Workpiece holder and method for producing three-dimensional screen printing workpieces

Abstract

The invention relates to the additive manufacturing of three-dimensional workpieces by means of screen printing. To simplify the screen printing of three-dimensional screen printing workpieces, the workpieces are printed onto a printing film.

Description

[0001] EXENTIS KNOWLEDGE GMBH 26713-EXE-PWO / NZ

[0002] Workpiece carriers and methods for producing three-dimensional screen-printed workpieces

[0003] The present invention relates to a workpiece carrier, in particular for the production of three-dimensional screen-printed workpieces. The present invention also relates to a support structure, in particular for such a workpiece carrier, and to a clamping device, in particular for such a support structure. Finally, the invention also relates to a retrofit kit for such a support structure and to a method for producing three-dimensional workpieces by means of screen printing.

[0004] Screen printing is used not only to create two-dimensional, i.e., flat, images, but also to create three-dimensional objects. Screen-printed objects are printed onto printing beds, with multiple layers being printed successively to produce a three-dimensional screen-printed object.

[0005] Print beds are plates that typically have a metallic surface. During screen printing, an adhesive force acts between the print bed and the workpieces, preventing unwanted slippage of the partially printed pieces on the print bed. However, if the adhesive force is too strong, the printed pieces may not be removable from the print bed without damage after printing.

[0006] Against the background outlined above, the object of the invention was to reduce the effort required for screen printing three-dimensional workpieces and the risk of producing rejects. This object has been achieved by a workpiece carrier according to claim 1 and also claim 102. With regard to a support structure, this object has been achieved by the subject matter of claim 59. With regard to a clamping device, this object has been achieved by the subject matter of claim 86. With regard to a retrofit kit, this object has been achieved by the subject matter of claim 101. With regard to the method, this object has been achieved by the subject matter of claim 106. Advantageous embodiments are specified in the respective dependent claims and are explained below.

[0007] A workpiece carrier according to the invention is, in particular, a workpiece carrier for the production of three-dimensional screen-printed workpieces. The workpiece carrier comprises a flexible printing film which has a printing surface that can be printed with three-dimensional screen-printed workpieces, a support structure that supports the printing film at least partially, and at least one clamping device for force-fit mounting of the printing film on and / or to the support structure.

[0008] The three-dimensional screen-printed workpieces are easily removed from the printing film because the printing film, unlike the print bed, is flexible and therefore readily deformable. This allows the screen-printed workpieces to be removed from the printing film with minimal effort by simply reshaping it. Simultaneously, such a printing film can be provided at minimal cost and, with the inventive embodiment of a workpiece carrier, a support structure, and / or a clamping device, can be attached and / or clamped or secured to a workpiece carrier for printing with minimal handling effort.

[0009] In this context, a flexible printing film is understood to be one that is pliable. A flexible printing film can, in particular, deform under its own weight and / or sag in sections due to the force of its weight, unless support or restraint is provided for the respective sections. In this case, a flexible printing film may consist of, or be manufactured from, a plastic material, a metal material, and / or cellulose.

[0010] The other components according to the invention, in particular the workpiece carrier, the support structure, the clamping device, and the method, as described in detail below, can be further improved by various embodiments, each advantageous in itself and, unless otherwise stated, combinable with one another. The advantageous embodiments and their associated benefits will be discussed in more detail below.

[0011] The respective details and advantages relating to the workpiece carrier, the support structure according to the invention, the clamping device according to the invention, and the method according to the invention also apply equally to the other objects or categories according to the invention.

[0012] Advantageously, a flexible printing film can have a material thickness of up to 25 pm, preferably up to 50 pm, preferably up to 75 pm, preferably up to 100 pm, preferably up to 150 pm, preferably up to 200 pm, more preferably up to 250 pm, preferably up to 300 pm, preferably up to 500 pm, preferably up to 750 pm, preferably up to 900 pm, preferably up to 1 mm, preferably up to 2 mm, preferably up to 3 mm.

[0013] In a further advantageous embodiment, a flexible printing film can have a material thickness of more than 25 µm, preferably more than 50 µm, preferably more than 75 µm, preferably more than 100 µm, preferably more than 150 µm, preferably more than 200 µm, more preferably more than 250 µm, preferably more than 300 µm, preferably more than 500 µm, preferably more than 750 µm, preferably more than 900 µm, preferably more than 1 mm, preferably more than 2 mm, preferably more than 3 mm. According to a preferred embodiment, the printing film can have several lateral sides, one of which can be held to the clamping device by frictional engagement. An advantage of such an embodiment can be that the clamping device can easily and releasably hold the printing film while simultaneously leaving sufficient usable printing area available on the printing film.For example, the clamping device can hold a free end of a printing film and keep a section of the printing film in the printing position. Another section of the printing film can be arranged on a printing film roll or held in a separate clamping device.

[0014] Preferably, the clamping device can be designed as a clamping strip, or two different clamping devices can each be designed as clamping strips.

[0015] The printing section can be positioned between the clamping device and the printing film roll and held taut in the printing position by both the printing film roll and the clamping device. Alternatively, the printing section can run between two different clamping devices and be held taut in the printing position. In the printing position, the printing film can rest on the print bed.

[0016] At least one clamping device can be arranged on a lateral side of the printing film section held in the printing position and be positively attached to the lateral side of the printing film. If two clamping devices are provided, one of the clamping devices can be positively attached to one of the lateral sides and the other of the clamping devices to opposite lateral sides.

[0017] According to a further embodiment, the workpiece carrier can have a plurality of clamping devices, in particular two clamping devices, for the force-fit attachment of the printing film to and / or on the support structure, wherein the clamping devices preferably form a clamping arrangement for the force-fit attachment of the printing film to and / or on the support structure and / or wherein the printing film preferably runs between the clamping devices. This ensures a particularly secure and precise attachment of the printing film.

[0018] Preferably, one of the lateral sides of the printing film can be held in a force-fit manner by one of the clamping devices, and another lateral side of the printing film can be held in the other clamping device. An advantage of such an embodiment can be that the printing film, even when provided as a sheet for printing, can be held more precisely by two clamping devices. The clamping devices can be arranged around the printing film in such a way that they align and hold the printing film flat. For example, the clamping devices can be rotationally symmetrical and arranged around the printing film on at least two sides.

[0019] According to another embodiment, the at least one clamping device can be movably connected to the support structure. An advantage of such an embodiment can be that the printed film can be precisely aligned with respect to the support structure.

[0020] The clamping device, or at least one of it, can also be rigidly connected to the supporting structure. This can ensure an overall simple and robust design.

[0021] According to a further embodiment, the support structure can comprise a base and a print bed for holding the printing film, with the print bed being arranged on the base. The print bed can be designed separately from the base and / or integrated into the base. An advantage of such an embodiment is that not the entire support structure, but only the print bed needs to be suitable for holding the printing film during printing, which can reduce the costs for the entire support structure and ensures a precisely defined printing area.

[0022] According to another embodiment, the support structure can have a base plate, and a print bed can be formed integrally with the base plate. This ensures a particularly simple and robust construction.

[0023] According to a further embodiment, the print bed can have a support side that rests on the base and a storage side facing away from the base. Vacuum openings can preferably be provided in the storage side to draw the printing film in by means of a vacuum. Furthermore, vacuum openings can preferably extend between the storage side and the support side to draw the printing film in by means of a vacuum. An advantage of such a design can be that unwanted movement of the printing film during printing can be prevented even more effectively. Optionally, the vacuum openings can even eliminate the need to hold the printing film taut with the clamping device(s) during screen printing.

[0024] According to a further embodiment, the vacuum openings can be arranged in and / or transversely to the clamping direction at the same and / or different distances from each other. An advantage of such an embodiment can be that the printing film can be held in place by varying degrees of suction in different areas, thus securing the printing film even more effectively against unwanted movement. For example, in an area where the edges of the printing film rest during operation, the vacuum openings can have a higher surface density than in an area where a central area of ​​the printing film rests during operation.

[0025] According to a further embodiment, the vacuum openings can have an increasing cross-section along their length. In particular, the cross-section can increase towards the side of the print bed facing the support surface. An advantage of such an embodiment can be that the vacuum can be established and / or maintained quickly and sufficiently, with only small interruptions in the print bed's contact surface on the support side.

[0026] According to another embodiment, the support structure can include a tensioning device for tensioning the printing film in a specific direction. An advantage of such an embodiment can be that the tensioned printing film is less mobile and its position is more precisely defined during screen printing.

[0027] A span direction can run along or parallel to a plane extension of the print bed and / or the support structure and / or the base, or transversely to a thickness direction of the print bed and / or the support structure and / or the base.

[0028] According to another embodiment, the clamping device can be arranged on the support base. The clamping device and the support base can thus form a single assembly. An advantage of such an embodiment can be that the support base and the clamping device connected to it can be manufactured with minimal effort, and a direct connection of the clamping device to the print bed is not strictly necessary.

[0029] According to a further embodiment, the clamping device can be movably connected to the support base relative to the print bed. The at least one clamping device can be connected to the clamping device or be connectable to it in a way that transmits movement. An advantage of such an embodiment can be that the print film clamped in the clamping device can be easily aligned relative to the print bed and kept taut. According to a further embodiment, the clamping device can be repeatedly and releasably attached to the clamping device. An advantage of such an embodiment can be that the clamping device can be handled separately from the clamping device, for example, to attach the clamping device to the print film or to remove the print film together with the clamping device from the support structure.

[0030] According to another embodiment, the support base can have several lateral sides, with the clamping device being arranged on and / or adjacent to one of the lateral sides of the support base. An advantage of such an embodiment can be that the clamping device is easily accessible, for example, to operate the clamping device or to attach the clamping device to the clamping device. At the same time, sufficient installation space remains available for the print bed.

[0031] According to a further embodiment, the clamping device arranged on and / or adjacent to one of the lateral sides of the support surface can be displaced against an elastic clamping force acting in the clamping direction towards another of the lateral sides of the support surface. An advantage of such an embodiment can be that the clamping device can apply the clamping force for tensioning the printing film automatically and therefore with minimal effort.

[0032] According to a further embodiment, the support structure can have a mounting device that is rigidly attached to the support structure, in particular a mounting device that is rigidly connected to the support surface relative to the print bed and / or relative to the support surface, wherein the mounting device or a clamping device can be rigidly attached to the support structure and / or via the mounting device along a clamping direction. An advantage of such an embodiment can be that the printing film can be attached to the support structure with a simple and therefore cost-effective mounting device. The design effort can thus be kept to a minimum.

[0033] The mounting device can form a fixed bearing through its immovable connection to the support surface or be part of a fixed bearing arrangement.

[0034] According to another embodiment, the clamping device can be repeatedly and releasably attached to the mounting device. An advantage of such an embodiment can be that the clamping device can be handled separately from the mounting device, for example, to attach the clamping device to the printing film or to remove the printing film together with the clamping device(s) from the support structure.

[0035] According to another embodiment, the support base can have several lateral sides, with the mounting device being arranged on and / or adjacent to one of the lateral sides of the support base. An advantage of such an embodiment can be that the mounting device is easily accessible, for example, to attach the clamping device to the mounting device. At the same time, this leaves sufficient installation space available for the print bed.

[0036] According to a further embodiment, the support structure can include a tensioning device for tensioning the printing film and / or a fixed mounting device, in particular a mounting device that is fixedly connected to the support surface relative to the print bed and / or relative to the support surface. Preferably, the tensioning device can be movably connected to the support surface relative to the print bed and / or relative to the support surface. More preferably, the at least one clamping device can be connected to the tensioning device or, in particular, fixedly connected to the mounting device in a way that transmits movement. An advantage of such an embodiment can be that several clamping devices can be easily attached to the support structure, providing sufficient movement functionality.Preferably, one or more clamping devices can be connected to the tensioning device, particularly in a motion-transmitting manner, and the other or one of the clamping devices can be connected to the mounting device, particularly in a fixed manner, on the support structure. Depending on the arrangement, one of the clamping devices can thus be fixed in position relative to the support structure, and another of the clamping devices can be movably arranged on the support structure relative to it. This can result in relative mobility between the clamping devices, which allows for particularly advantageous tensioning of the printed film between the clamping devices.

[0037] According to a further embodiment, the support surface can have several lateral sides, wherein the clamping device can be arranged on or adjacent to one of the lateral sides of the support surface and the mounting device can be arranged on or adjacent to another of the lateral sides of the support surface. Preferably, the support surface can extend between the clamping device and the mounting device. An advantage of such an embodiment can be that the clamping device and the mounting device can be easily accessed and sufficient installation space remains between the clamping device and the mounting device for the print bed and the placement of the printing film.

[0038] According to a further embodiment, one of the lateral sides of the support surface and the other of the lateral sides of the support surface can be arranged opposite each other. An advantage of such an embodiment can be that the printing film can be held and optionally tensioned from opposite sides, for example by at least two clamping devices, which enables cost-effective yet precise positioning of the printing film. According to a further embodiment, the printing bed can be arranged and / or extend between the tensioning device and the mounting device and / or between the lateral sides of the support surface. An advantage of such an embodiment can be that the printing film can be easily placed on the printing bed, even when held by at least two clamping devices.

[0039] According to a further embodiment, one of the at least two clamping devices can be attached to the clamping device in a way that transmits movement, and another of the at least two clamping devices can be attached to the mounting device in a way that prevents displacement relative to the print bed. In particular, each of the at least two clamping devices can be designed to be optionally attached to either the clamping device or the mounting device. An advantage of such an embodiment can be that the clamping devices are easier to mount and that there is greater flexibility in choosing the mounting positions for the respective clamping devices.

[0040] According to a further embodiment, one of the at least two clamping devices on the clamping device and another of the at least two clamping devices on the mounting device can be repeatedly and releasably attached. An advantage of such an embodiment can be that the clamping devices can be handled separately from the support structure, for example, to force-fit or clamp the printed film to the clamping devices.

[0041] According to a further embodiment, the support base can have a first side facing against the direction of gravity in an operating position of the workpiece carrier and a second side opposite the first side, wherein the clamping device can be arranged or extend at least partially along the second side. An advantage of such an embodiment can be that the printing film and / or the clamping devices can be easily handled and connected to the support base without colliding with the clamping device. Likewise, geometric restrictions that would impede movement of the clamping device relative to the support structure and / or relative to the print bed can be avoided.

[0042] According to a further embodiment, the print bed can be arranged or be arranged on the first side of the support base. An advantage of such an embodiment can be that the print bed is easily accessible and / or manageable and can be connected to the support base without colliding with the clamping device. The print bed can form a continuous surface with the support base, at least in sections, and / or be aligned with each other. In particular, a top surface of the print bed can be aligned with a top surface of the support base, at least in sections.

[0043] According to another embodiment, the support base can have or be equipped with a bearing for guiding the movement of the clamping device. The bearing can therefore be formed directly on the support base or by a separate bearing component attached to the support base. An advantage of such an embodiment can be that precise guidance of the clamping device's movement is enabled with minimal design effort and space requirements.

[0044] The clamping device, together with a bearing for guiding the movement of the clamping device, can form a floating bearing arrangement. The bearing can be a plain bearing and / or the clamping device can be designed as a sheet metal slide, in particular a spring-loaded sheet metal slide. The bearing can, in particular, have a plain bearing disc and / or a flanged bearing. In particular, the bearing can be designed as a combined plain and flanged bearing.

[0045] According to another embodiment, the bearing can be embedded, at least partially, in the second side of the support base. An advantage of such an embodiment can be that precise guidance of the clamping device's movement is enabled with minimal design effort and without geometric restrictions on the clamping device's movement relative to the print bed.

[0046] According to another embodiment, the bearing and the clamping device can be designed to be complementary to each other, at least in sections. An advantage of such an embodiment can be that precise guidance of the clamping device's movement is enabled with low cost and minimal space requirements.

[0047] According to another embodiment, the clamping device can have a guide receptacle and the bearing can have a guide projection. The guide projection can engage in the guide receptacle. An advantage of such an embodiment can be that the movement of the clamping device can be guided with low cost and minimal space requirements while maintaining high accuracy.

[0048] According to a further embodiment, the guide receptacle can have a larger extension along the clamping direction than the guide projection. An advantage of such an embodiment can be that the guide receptacle and the guide projection allow movement of the clamping device in and / or against the clamping direction.

[0049] According to a further embodiment, the difference between the extent of the guide receptacle and the extent of the guide projection can determine the maximum displacement of the clamping device relative to the pressure bed and / or the support base in and / or against the clamping direction. An advantage of such an embodiment can be that no separate stop is required to limit the displacement of the clamping device in and / or against the clamping direction, while simultaneously ensuring a precisely defined relative mobility. According to a further embodiment, the clamping device can have a guide tongue projecting against the clamping direction, wherein the guide tongue is provided with the guide receptacle. Furthermore, the guide tongue can engage in a receiving structure of the support base.One advantage of such an embodiment can be that sufficient space is provided for the guide housing in a space-saving manner and precise guidance of the movement of the clamping device is ensured.

[0050] According to a further embodiment, the support surface can have several guide projections, with at least one spring device applying the elastic clamping force being arranged between at least two of the guide projections. An advantage of such an embodiment can be that the spring device and the guide projections are arranged in a space-saving manner.

[0051] According to a further embodiment, the clamping device can have several guide tongues projecting in the opposite direction to the clamping direction, each guide tongue being provided with a guide receptacle and / or engaging in a receiving structure of the support base. An advantage of such an embodiment can be that the guiding accuracy is improved while saving space.

[0052] According to a further embodiment, the support structure and / or the base can have at least one spring device receptacle for receiving the spring device, wherein the spring device receptacle can preferably be arranged between two of the guide tongues. An advantage of such an embodiment can be that the spring device can be arranged in a space-saving manner and can provide reliable spring functionality.

[0053] According to a further embodiment, the support structure can include a clamping device cover plate. The guide projection can have a fastening element for a counter-fastening element that secures the clamping device cover plate to the support surface. For example, the fastening element can be a threaded stud with an external thread or a threaded opening with an internal thread. An advantage of such an embodiment can be that the clamping device cover plate can be installed in a space-saving manner and with a high degree of fastening security. The clamping device cover plate can at least partially cover the clamping device to prevent obstruction of its movement by external parts and / or to prevent the clamping device from moving away from the support surface unintentionally.

[0054] Such a clamping device cover plate can also have and / or provide at least partially a guiding function or guide surfaces for the clamping device.

[0055] According to a further embodiment, the bearing can have several guide projections, at least two of which can be arranged one behind the other along the clamping direction. An advantage of such an embodiment can be that two guide projections arranged one behind the other along the clamping direction can guide the linear sliding of the clamping device along the clamping direction even more effectively than a single guide projection. Undesired rotational positions of the clamping devices can thus be reliably avoided.

[0056] According to a further embodiment, the guide receptacle receiving the guide projections can have an extension along the clamping direction that is greater than the distance between the outward-facing sides of the guide projections arranged one behind the other along the clamping direction. An advantage of such an embodiment can be that the guide projections and the guide receptacle allow the clamping device to move along the clamping direction. According to a further embodiment, the difference between the extension of the guide receptacle and the distance between the outward-facing sides can determine the maximum displacement of the clamping device in and / or against the clamping direction. An advantage of such an embodiment can be that the maximum displacement of the clamping device can be determined without an additional stop.

[0057] According to a further embodiment, the clamping device and / or the mounting device can each have one or more mounting devices. Such mounting devices can, for example, include a mounting fixture.

[0058] Preferably, the maximum displacement of the clamping device in the clamping direction can be greater than the sum of the extent of at least one section of one of the mounting receptacles of the clamping device along the clamping direction and the extent of at least one section of one of the mounting receptacles of the mounting device along the clamping direction. An advantage of such an embodiment can be that the mounting receptacles ensure simple and secure attachment of the clamping device to the clamping device, namely in the retracted position of the clamping device and with a predetermined dimension of the printing film.

[0059] Simultaneously, given a predetermined dimension of a pressure film clamped in the respective clamping devices, the sum of the extent of at least one section of one of the mounting receptacles of the clamping device along the clamping direction and the extent of at least one section of one of the mounting receptacles of the mounting device along the clamping direction can limit the maximum movement of the clamping device from a retracted position in a clamping direction. Upon reaching an end position of movement of the clamping device defined by the mounting receptacles, the pressure film can be held under tension, provided that the clamping device can continue to move in the clamping direction without the pressure film clamped in place. According to a further embodiment, at least selected of the mounting receptacles can be designed, at least partially, as elongated slots, with one longitudinal axis of the elongated slots being oriented essentially along the clamping direction.One advantage of such a design can be that elongated holes simplify the precise attachment and fixing of the clamping device.

[0060] According to a further embodiment, at least selected mounting receptacles can be keyhole-shaped. Keyhole-shaped receptacles can have an elongated slot section and a circular section arranged at one longitudinal end of the elongated slot section. The longitudinal end can, for example, point away from the support surface. Transverse to the longitudinal direction of the elongated slot section, the circular section can have a larger dimension than the elongated slot section. An advantage of such an embodiment can be that keyholes further simplify the precise mounting and fixing of the clamping device and ensure that a fixed position of the clamping device is reliably maintained when the pressure film is under tension.

[0061] According to another embodiment, the support structure and, for example, the print bed can have a predefined point. The clamping device and the mounting device can be arranged rotationally symmetrically or substantially rotationally symmetrically with respect to the predefined point, particularly if the clamping device is in a partially retracted clamping position. The partially retracted clamping position can lie between a fully or maximally extended position, in which the clamping device can be moved along the clamping direction, and a fully or maximally retracted position, in which the clamping device can be moved against the clamping direction. An advantage of such an embodiment can be that the workpiece carrier can be used in several orientations for the production of three-dimensional screen-printed workpieces without further modifications.Furthermore, this can improve the usability of clamping devices both on the clamping device and on the mounting device, and also ensure a particularly uniform film tension.

[0062] According to another embodiment, the clamping device can be designed to be mirror-symmetrical with respect to an axis passing through the predefined point. An advantage of such an embodiment can be that a mirror-symmetrical clamping device is less likely to tilt when moved in and / or against the clamping direction.

[0063] According to another embodiment, the predefined point can be the center of the print bed or be formed by the center of the print bed. An advantage of such an embodiment can be that it simplifies the alignment of the print film.

[0064] According to a further embodiment, the mounting device and / or the clamping device can have a mounting device, and the clamping device(s) can have a counter-mounting device for attaching the clamping device to the mounting device. An advantage of such an embodiment can be that the clamping device is particularly easy to attach with minimal handling effort.

[0065] According to a further embodiment, the counter-mounting device can be designed, at least partially, as a pin. The pin-shaped counter-mounting device preferably has a mounting flange that at least partially surrounds the pin shape and projects away from it, particularly radially. The counter-mounting device can, in particular, be mushroom-shaped. An advantage of such an embodiment can be that the mounting flange can prevent the clamping device from tilting even when tensile forces act on the clamping device along and / or against the clamping direction, especially if the mounting device and / or the clamping device has a mounting receptacle into which the counter-mounting device can be inserted or is inserted, and the mounting flange can engage an edge of the mounting receptacle.

[0066] If the mounting receptacle is keyhole-shaped, the mounting flange can be dimensioned so that it can be guided through the round section. A pin section at least partially circumscribed by the mounting flange can have a diameter smaller than the width of the slotted section of the mounting receptacle running perpendicular to the longitudinal direction of the slotted section. Simultaneously, the mounting flange can have a larger diameter than the width of the slotted section, so that when the counter-mounting device is positioned within the slotted section of the mounting receptacle, a positive-locking connection is created between the mounting receptacle and the counter-mounting device in the longitudinal direction of the counter-mounting device.

[0067] According to another embodiment, the clamping device can have a mounting plate for attaching the clamping device to the support structure, and a clamping plate that can be pivoted about a pivot axis relative to the mounting plate. An advantage of such an embodiment can be that the clamping device can be manufactured with few parts while simultaneously providing reliable clamping functionality.

[0068] According to another embodiment, the counter-mounting device can be attached to the mounting plate. An advantage of such an embodiment can be that the clamping device can be easily attached to the support structure.

[0069] According to a further embodiment, the mounting plate and the clamping plate can have opposing clamping surfaces. During operation of the clamping device, the printed film can be clamped or pressed between the clamping surfaces and thereby held securely in place. An elastic clamping element can preferably be attached to one of the clamping surfaces. An advantage of such an embodiment is that the printed film can be easily attached to and detached from the clamping device, while a sufficiently high degree of secure attachment can be achieved in the clamped position.

[0070] According to a further embodiment, the elastic clamping element can be arranged, at least partially, in a recess provided in one of the clamping surfaces to which the clamping element is attached. An advantage of such an embodiment can be that the clamping element is securely held on the mounting plate or clamping plate, thus increasing clamping reliability during operation.

[0071] According to a further embodiment, the clamping device can have a spring-loaded connecting plate. The spring-loaded connecting plate can immovably connect the mounting plate and the clamping plate and / or hold or press them together in a clamping position. An advantage of such an embodiment can be that the clamping device can automatically apply a clamping or pressing force to hold the pressure film, so that no additional elements, such as actuators, are required to provide and / or maintain the clamping or pressing force.

[0072] According to another embodiment, the connecting plate can be a leaf spring, a spring lashing, or a spring tongue. The connecting plate can be made of spring steel or even consist entirely of it. An advantage of such an embodiment can be that the connecting plate is subject to low wear and is therefore durable and / or requires little or no maintenance.

[0073] According to a further embodiment, the connecting plate can have two mounting areas spaced apart from each other transversely to the pivot axis, wherein one of the mounting areas is attached to the mounting plate and the other to the clamping plate, and / or wherein the mounting areas are each spaced apart from the pivot axis, and / or, viewed in a clamping direction, are arranged on both sides of the pivot axis. An advantage of such an embodiment can be that the connecting plate is deformed uniformly when the clamping device is opened, i.e., when the clamping surfaces are moved away from each other, thus preventing small-scale or even localized overloading of the connecting plate.

[0074] According to another embodiment, one of the mounting areas can be arranged between the other mounting area and the clamping surfaces. An advantage of such an embodiment can be that opening the clamping device is made easier. Furthermore, the pivot axis can run between the two mounting areas.

[0075] According to a further embodiment, the clamping surface of the clamping plate can abut one end of the clamping plate transversely to the pivot axis, and the other of the mounting areas can abut the opposite end of the clamping plate. An advantage of such an embodiment can be that the connecting plate does not obstruct the insertion of the pressure film between the clamping surfaces.

[0076] According to a further embodiment, the clamping element can extend completely along one direction of the pivot axis and / or parallel to the pivot axis, at least partially, or along the clamping plate and / or along the mounting plate. An advantage of such an embodiment can be that the clamping element can clamp or press the pressure film not at a single point, but essentially along a line, thereby preventing localized overloading of the pressure film under tension.

[0077] According to a further embodiment, in a clamping state of the clamping device in which the clamping element rests against the opposite clamping surface or the pressure film presses against the opposite clamping surface, the clamping element can rest against the opposite clamping surface or the pressure film at least partially or continuously along the pivot axis. An advantage of such an embodiment can be that the clamping element can clamp or press the pressure film not just at a single point, but essentially along a line, in a continuous, area-like manner, thereby preventing localized overloading of the pressure film under tension.

[0078] According to a further embodiment, the clamping device can have at least one holding receptacle for holding and / or handling by an external handling device and / or two holding receptacles for holding and / or handling by an external handling device, positioned apart from each other along a direction of the pivot axis or along a direction parallel to the pivot axis. Ends of the holding receptacles pointing away from each other along a direction of the pivot axis or along a direction parallel to the pivot axis can have clear openings extending transversely to the pivot axis that are larger than the clear openings of two opposing ends of the holding receptacles. The holding receptacles can, for example, be keyhole-shaped.One advantage of such a design can be that clamping devices can be easily gripped, moved and held with suitable tools, such as mushroom-shaped grippers.

[0079] According to another embodiment, the retaining receptacles (Y) can be keyhole-shaped.

[0080] According to another embodiment, the clamping plate can have the retaining receptacles. An advantage of such an embodiment can be that the clamping plate can be moved with the tool even when the clamping device is attached to the supporting structure, for example to open and / or close the clamping device.

[0081] According to a further embodiment, the print bed can project beyond at least one of the clamping surfaces transversely to the pivot axis and / or in a thickness direction of the print bed or in a thickness direction of the support structure. The print bed can abut a common plane with the clamping device(s) or project beyond the clamping surfaces.

[0082] The printing film can be stretched over an edge of the print bed or support surface that extends beyond the clamping area. This edge can be rounded and, for example, have a radius of 1 mm, 2 mm, up to 5 mm, up to 10 mm, or even more than 10 mm. The edge can surround the print bed and / or be part of the support surface. An advantage of this design is that the printing film, tensioned by the clamping device and the clamping force, is securely stretched onto the print bed and not separated from it.

[0083] Another aspect of the present invention relates to a support structure. A support structure according to the invention is in particular designed as a support structure for a workpiece carrier for the production of three-dimensional screen-printed workpieces, especially for a workpiece carrier according to the further aspect of the invention.The support structure according to the invention comprises a print bed for depositing a printing film, a clamping device, and a mounting device. The clamping device and the mounting device are arranged on different and preferably opposite sides of the print bed. The clamping device and the mounting device may include mounting elements with which different sides or opposite ends of a printing film can be brought into operative contact. The clamping device is preferably displaceable in one direction against an elastic clamping force directed towards the print bed. A printing film to be clamped and / or held in such a support structure may, in particular, have a printing surface that can be printed with three-dimensional screen-printed workpieces.

[0084] According to a further embodiment of the support structure, the support structure has a base on which the clamping device is arranged and / or on which the pressure bed is arranged or can be arranged. According to a further embodiment of the support structure, the base has a first side on which the pressure bed is arranged or can be arranged, and a second side facing away from the first side, wherein the clamping device is arranged at least partially on the second side and / or extends along the second side.

[0085] According to another embodiment of the support structure, the support base has a bearing for guiding the movement of the clamping device.

[0086] According to another embodiment of the support structure, the bearing is embedded at least partially in the second side of the support base.

[0087] According to another embodiment of the support structure, the bearing and the clamping device are designed to be complementary to each other, at least in sections.

[0088] According to another embodiment of the support structure, the clamping device has a guide receptacle and the bearing has a guide projection, wherein the guide projection engages in the guide receptacle.

[0089] According to another embodiment of the support structure, the guide receptacle has a larger extent along the clamping direction than the guide projection.

[0090] According to another embodiment of the support structure, the difference between the extent of the guide receptacle and the extent of the guide projection determines the maximum displacement of the clamping device in and / or against the clamping direction.

[0091] According to a further embodiment of the support structure, the clamping device has a guide tongue projecting in the opposite direction to the clamping direction, wherein the guide tongue is provided with the guide receptacle and / or wherein the guide tongue engages in a receiving structure of the support base.

[0092] According to another embodiment of the support structure, the clamping device has several guide receptacles, wherein at least one spring device applying the elastic clamping force is arranged between at least two of the guide receptacles.

[0093] According to a further embodiment of the support structure, the clamping device has several guide tongues projecting in the opposite direction to the clamping direction, wherein the guide tongues are each provided with at least one of the guide receptacles and / or each engage in a receiving structure of the support base.

[0094] According to another embodiment of the support structure, the support base has at least one spring device receptacle, wherein the spring device receptacle is preferably arranged between two of the guide tongues.

[0095] According to a further embodiment of the support structure, the support structure has a clamping device cover plate, wherein preferably the guide projection has a fastening element for a counter fastening element that fastens the clamping device cover plate to the support base.

[0096] According to another embodiment of the support structure, the bearing has several guide projections, at least two of which are arranged one behind the other along the clamping direction.

[0097] According to a further embodiment of the support structure, a guide receptacle receiving the guide projections has an extension along the clamping direction that is greater than the distance between the outward-facing sides of the guide projections arranged one behind the other along the clamping direction. According to a further embodiment of the support structure, the difference between the extension of the guide receptacle and the distance between the outward-facing sides determines the maximum displacement of the clamping device (5) in and / or against the clamping direction.

[0098] According to a further embodiment of the support structure, the mounting devices have mounting receptacles, wherein preferably the maximum displacement of the clamping device is greater than the sum of the extent of at least one section of one of the mounting receptacles of the clamping device along the clamping direction and the extent of at least one section of one of the mounting receptacles of the mounting device along the clamping direction.

[0099] According to another embodiment of the support structure, at least selected of the mounting fixtures are designed at least partially as elongated holes, with one longitudinal axis of the elongated holes being oriented essentially along the clamping direction.

[0100] According to a further embodiment of the support structure, at least selected of the mounting receptacles are keyhole-shaped, wherein the keyhole-shaped mounting receptacles have an elongated slot section and a circular section arranged at a longitudinal end of the elongated slot section pointing away from the support base.

[0101] According to a further embodiment of the support structure, the print bed can have a predefined point, and the clamping device, arranged in a partially retracted clamping position, as well as the mounting device, can be arranged essentially rotationally symmetrically with respect to the predefined point, at least when the clamping device is arranged in a partially retracted clamping position. According to a further embodiment of the support structure, the clamping device can be designed to be mirror-symmetrical with respect to an axis passing through the predefined point.

[0102] According to another embodiment of the support structure, the predefined point can be the center point of the print bed or formed by the center point of the print bed.

[0103] According to a further embodiment of the support structure, a support side of the print bed can rest on the support base and a storage side of the print bed pointing away from the support base can have vacuum openings to draw in a printing film by means of a vacuum, and / or wherein vacuum openings preferably extend between the storage side and the support side to draw in a printing film by means of a vacuum.

[0104] According to another embodiment of the support structure, the support base can have at least one vacuum line, wherein the vacuum line is connected to at least one of the vacuum openings in a gas-conducting manner.

[0105] According to another embodiment of the support structure, the vacuum openings can be arranged at the same or different distances from each other in and / or transversely to the clamping direction.

[0106] According to another embodiment of the support structure, the vacuum openings can have an increasing cross-section along their course.

[0107] A further aspect of the present invention relates to a clamping device. The clamping device according to the invention is specifically designed as a clamping device for a support structure according to the invention. The clamping device according to the invention is for the force-fit mounting of a printing film having a printing surface printable with three-dimensional screen-printed workpieces, wherein the clamping device comprises a counter-mounting device for mounting the clamping device on the clamping device or the mounting device, in particular a support structure according to a further aspect of the invention.

[0108] According to a further embodiment of the clamping device, the counter-mounting device can be designed at least partially in a pin-shaped form, wherein the at least partially pin-shaped counter-mounting device preferably has a mounting flange in its course that runs at least partially around the pin shape and projects from the pin shape, in particular projecting radially, and / or runs around the pin shape.

[0109] According to another embodiment of the clamping device, it can have a mounting plate to which the counter-mounting device is attached, and / or a clamping plate that can be pivoted relative to the mounting plate about a pivot axis.

[0110] According to a further embodiment of the clamping device, the mounting plate and the clamping plate can have opposing clamping surfaces, wherein a pressure film is clamped between the clamping surfaces during operation of the clamping device or the clamping surfaces, with one of the clamping surfaces preferably having an elastic clamping element.

[0111] According to another embodiment of the clamping device, the clamping element can be arranged at least partially in a recess located in one of the clamping surfaces to which the clamping element is attached.

[0112] According to a further embodiment of the clamping device, the connecting plate has a spring-elastic connecting plate, wherein the spring-elastic connecting plate preferably connects the mounting plate and the clamping plate to each other in a non-displaceable manner and / or holds them in a clamping position relative to each other by spring elasticity. According to a further embodiment of the clamping device, the connecting plate can have two mounting areas spaced apart from each other transversely to the pivot axis, wherein one of the mounting areas is attached to the mounting plate and the other of the mounting areas is attached to the clamping plate and / or wherein the mounting areas are each arranged at a distance from the pivot axis.

[0113] According to another embodiment of the clamping device, one of the fastening areas can be arranged between the other fastening areas and the clamping surfaces.

[0114] According to another embodiment of the clamping device, the clamping surface of the clamping plate can adjoin one end of the clamping plate transversely to the pivot axis, and the other of the fastening areas can adjoin another end of the clamping plate opposite one end of the clamping plate.

[0115] According to another embodiment of the clamping device, the clamping element can extend along a direction of the pivoting direction and / or parallel to the pivoting axis at least partially or completely along the clamping plate and / or along the mounting plate.

[0116] According to a further embodiment of the clamping device, in a clamping state of the clamping device or the clamping surfaces in which the clamping element rests against the opposite clamping surface or a pressure film presses against the opposite clamping surface, the clamping element can rest at least partially or continuously against the opposite clamping surface or the pressure film along the pivot axis.

[0117] According to a further embodiment of the clamping device, it can have two holding receptacles that are offset from each other along the pivot axis. According to a further embodiment of the clamping device, the holding receptacles can each have ends pointing away from each other along a direction of the pivot axis or a direction parallel to the pivot axis, with clear openings extending transversely to the pivot axis that are larger than the clear openings of two opposing ends of the holding receptacles extending transversely to the pivot axis.

[0118] According to another embodiment of the clamping device, the holding receptacles can be keyhole-shaped.

[0119] According to another embodiment of the clamping device, the clamping plate can have the holding receptacles.

[0120] Another aspect of the present invention relates to a retrofit kit. The retrofit kit according to the invention is a retrofit kit, in particular for the support structure according to the invention, and comprises at least two clamping devices according to the invention, in particular two clamping devices according to the present invention.

[0121] Another aspect of the present invention also relates to a workpiece carrier, in particular a workpiece carrier for the production of three-dimensional screen-printed workpieces on a printing film. Such a workpiece carrier has a support structure according to the invention and at least two of the clamping devices according to the invention for the force-fit holding of a printing film, wherein the at least two clamping devices are arranged on different sides of the printing bed, particularly when a printing film rests on the printing bed. The printing film can have a printing surface that can be printed with three-dimensional screen-printed workpieces.

[0122] According to a further embodiment of the workpiece carrier, one of the at least two clamping devices can be attached or attachable to the clamping device in a movement-transmitting manner, and another of the at least two clamping devices can be attached or attachable to the mounting device in a manner that is immovable relative to the print bed.

[0123] According to a further embodiment of the workpiece carrier, one of the at least two clamping devices can be repeatedly detachably attached to the clamping device and another of the at least two clamping devices can be repeatedly detachably attached to the mounting device.

[0124] According to another embodiment of the workpiece carrier, the at least two clamping devices can be as described above, and the print bed can project beyond at least one of the clamping surfaces transversely to the pivot axis and / or the print bed can be aligned with the clamping plate and / or a top surface of the clamping plate.

[0125] Another aspect of the present invention relates to a method for producing three-dimensional screen-printed workpieces, in particular with a workpiece carrier as described above. In the inventive method for producing three-dimensional screen-printed workpieces, a printing film is repeatedly screen-printed to create three-dimensional screen-printed workpieces in several printing processes.

[0126] The method according to the invention can be further improved by various embodiments, each advantageous in itself and, unless otherwise stated, arbitrarily combinable with one another. The advantageous embodiments and their associated benefits are discussed in more detail below.

[0127] According to an advantageous embodiment, different edge areas of the printing film can be clamped with different clamping devices to create a force-fit connection between the printing film and the clamping devices. The clamping devices can be attached to different sides of a support structure containing the printing bed before or after the screen printing process begins. An advantage of such an embodiment is that the printing film is securely held by the clamping devices through this force-fit connection and can be easily detached from the clamping devices. Furthermore, the clamping devices attached to the support structure can easily keep the printing film taut, particularly during one or more printing processes.

[0128] According to a further embodiment, the support structure can be the support structure according to the invention, wherein the clamping device is pushed towards the print bed against the clamping force before or after the clamping devices are attached to the clamping device and the mounting device. An advantage of such an embodiment can be that the printing film can be easily attached to the support structure without tension or with minimal mechanical tension.

[0129] According to another embodiment, the clamping force can push the clamping device away from the print bed and stretch the printing film onto or over the print bed while the three-dimensional screen-printed workpieces are being printed. An advantage of such an embodiment is that the printing film is only stretched after the clamping devices have been mounted, which simplifies the mounting of the clamping devices. After mounting, the printing film can be stretched over the print bed, allowing the print bed to serve as a support for the printing film. This means that not only the clamping force but also the print bed itself can prevent unwanted movement of the printing film during screen printing.

[0130] According to another embodiment, the clamping device can be moved towards the print bed against the clamping force after the screen-printed workpieces have been printed, particularly to release the clamping devices from the clamping device and the mounting device. An advantage of such an embodiment can be that the clamping devices holding the printing film with the screen-printed workpieces can be removed from the support structure more easily and with a high degree of handling safety.

[0131] According to another embodiment, the clamping devices can be detached from the support structure, in particular from the clamping device and the mounting device, in order to remove the printing film from the print bed after the clamping device has been moved against the clamping force towards the print bed. An advantage of such an embodiment can be that the clamping devices holding the printing film with the screen-printed workpieces can be removed more easily from the support structure.

[0132] According to another embodiment, the three-dimensional screen-printed workpieces can be dried and / or cured on the printing film before or after the clamping devices are removed from the support structure. An advantage of such an embodiment can be that the dried and / or cured three-dimensional screen-printed workpieces deform less when separated from the printing film than uncured or undried screen-printed workpieces.

[0133] According to another embodiment, the screen-printed workpieces can be detached from the printing film. An advantage of such an embodiment can be that the screen-printed workpieces detached from the printing film can be fed to further processing steps with minimal handling effort, for example a sintering step and / or an assembly and / or packaging step.

[0134] According to a further embodiment, one of the clamping devices to which the printing film is attached can be moved to pull the printing film over a shearing device or shearing edge, thereby releasing the screen-printed workpieces from the printing film. Alternatively, at least one of the clamping devices can first be removed from the printing film, and the printing film can then be pulled over the shearing edge. An advantage of such an embodiment is that the printing film can be easily removed from the screen-printed workpieces by pulling it over the shearing edge, thus making damage to the screen-printed workpieces during removal of the printing film even less likely.

[0135] A further aspect of the present invention relates to a device for producing three-dimensional screen-printed workpieces with a printing device and with at least one workpiece carrier described above or with a plurality of workpiece carriers described above.

[0136] For a better understanding of the present invention, reference is made below to the drawings. These schematically show only exemplary embodiments of the invention. Features of these exemplary embodiments can be combined independently of one another.

[0137] In the figures and the accompanying description, identical or equivalent parts are marked with the same reference symbols.

[0138] They show:

[0139] Figure 1 shows a workpiece carrier according to an embodiment of the present invention in a schematic perspective view,

[0140] Figure 2 shows the workpiece carrier of the embodiment of Figure 1 in a top view of its underside,

[0141] Figure 3 shows the workpiece carrier of the embodiment shown in Figures 1 and 2 in a further top view of its underside,

[0142] Figure 4 shows the workpiece carrier of the embodiment shown in Figures 1 to 3 in a further top view of its underside; Figure 5 shows the workpiece carrier of the embodiment shown in Figures 1 to 4 in a sectional view.

[0143] Figure 6 shows the workpiece carrier of the embodiment shown in Figures 1 to 5 in a further sectional view.

[0144] Figure 7 shows the workpiece carrier of the embodiment shown in Figures 1 to 6 in a further sectional view,

[0145] Figure 8 shows the workpiece carrier of the embodiment shown in Figures 1 to 7 in a further sectional view,

[0146] Figure 9 shows the workpiece carrier of the embodiment shown in Figures 1 to 8 in yet another sectional view,

[0147] Figure 10 shows an embodiment of two clamping devices with a printed film attached to them.

[0148] Figure 11 shows an embodiment of two clamping devices with a printing film attached to them during the separation of screen-printed workpieces from the printing film and

[0149] Figure 12 shows a flowchart representing the method according to an embodiment of the present invention.

[0150] Figure 1 shows a workpiece carrier 1 in a schematic perspective view. The workpiece carrier 1 can be used for the production of three-dimensional screen-printed workpieces, which are not shown in detail here. The workpiece carrier 1 has a flexible printing film, also not shown in detail here. The printing film can be retrofitted. The printing film has a printing surface that can be printed with three-dimensional screen-printed workpieces. The workpiece carrier 1 has a support structure 2. In operation, the support structure 2 carries the printing film, at least in sections.

[0151] The workpiece carrier 1 has at least one clamping device 3 for force-fit mounting of the printing film on and / or the support structure 2.

[0152] According to one aspect of the invention, the support structure 2 has a printing bed 4. The support structure 2 can be a support structure 2 for a workpiece carrier and, in particular, for the workpiece carrier 1 for the production of three-dimensional screen-printed workpieces.

[0153] The support structure 2 has a clamping device 5. The support structure 2 also has a mounting device 6. The clamping device 5 and the mounting device 6 are arranged on different and preferably opposite sides of the print bed 4. The clamping device 5 and the mounting device 6 have mounting devices 16, as shown, for example, in Figure 2. The mounting devices 16 allow different sides of the print film to be brought into operative contact, in particular by means of the clamping device 3 or clamping devices 3.

[0154] The clamping device 5 can be displaced towards the printing bed 4 against an elastic clamping force pointing in a clamping direction R.

[0155] The clamping device 3 has a counter-mounting device for mounting the clamping device 3 on the clamping device 5 or the mounting device 6.

[0156] According to one aspect of the invention, at least two of the clamping devices 3 are part of a retrofit kit for a support structure and in particular for the support structure 2 according to the invention. According to one aspect of the invention, the workpiece carrier 1 has the support structure 2 and at least one clamping device 3 or at least two of the clamping devices 3, preferably, when the printing film rests on the printing bed 4, the at least two clamping devices 3 are arranged on different sides of the printing bed 4.

[0157] One of the clamping devices 3 can be movably connected to the support structure 2. The support structure 2 can thus have a support base 7, with the print bed 4 being arranged on the support base 7. The tensioning device 5 for tensioning the print film in the tension direction R can be movably connected to the support base 7 relative to the support base 7 and / or the print bed 4.

[0158] The clamping device 3 or one of the clamping devices 3 can be connected or connectable to the clamping device 5 in a way that transmits movement.

[0159] The support surface 7 can have several lateral sides, with the clamping device 5 being arranged on one of the lateral sides of the support surface 7. The clamping device 5 arranged on one of the lateral sides of the support surface 7 can be displaceable against an elastic clamping force pointing in the clamping direction R towards another of the lateral sides of the support surface 7. The lateral sides of the support surface 7 can be opposite each other. The lateral sides of the support surface 7 can be opposite each other along the clamping direction R.

[0160] The mounting device 6 can be arranged on one of the lateral sides of the support floor 7 and in particular on the lateral side of the support floor 7 opposite the clamping device 5.

[0161] The mounting device 6 can be immovably connected to the support surface 7 relative to the print bed 4 and / or the support surface 7. The clamping device 3, or one of the clamping devices 3, can be attached to or is attached to the mounting device 6.

[0162] In particular, the clamping device 3 can be repeatedly and releasably attached to the mounting device 6. Furthermore, the clamping device 3 can be repeatedly and releasably attached to the clamping device 5.

[0163] In the illustrated embodiment, the support structure 2 includes, by way of example, the clamping device 5 for tensioning the printing film and the mounting device 6, which is immovably connected to the support surface 7 relative to the printing bed 4 and / or the support surface 7. The clamping device 5 can be movably connected to the support surface 7 relative to the printing bed 4 and / or the support surface 7. The clamping device 3, and for example each of the clamping devices 3, can be configured to be connected to the clamping device 5 or to the mounting device 6 in a way that transmits movement.

[0164] If the workpiece carrier 1 has two clamping devices 3, one of the clamping devices 3 can be attached to the clamping device 5 and the other of the clamping devices 3 to the mounting device 6, or at least be attachable to them. Furthermore, the print bed 4 can be arranged, in particular along the clamping direction R, between the clamping device 5 and the mounting device 6. Additionally, the print bed 4 can be arranged, in particular along the clamping direction R, between the clamping devices 3.

[0165] The support structure 2 and / or the support base 7 can have a first side A1 pointing against the direction of gravity S in an exemplary operating position B of the workpiece carrier 1, and a second side A2 opposite the first side A1. The clamping device 5 can be arranged at least partially on the second side A2. In operating position B, the first side A1 can be the top surface of the support structure 2 and / or the support base 7. In operating position B, the second side A2 can be the bottom surface of the support structure 2 and / or the support base 7. The first side A1 can be spaced apart from the second side A2 in a thickness direction H of the support structure 2 and, for example, the support base 7. In operating position B, the direction of gravity S can correspond to the thickness direction H.

[0166] The clamping direction R can run perpendicular to the thickness direction H. Likewise, the clamping direction R can run along or parallel to a plane extension of the print bed 4 and / or the support structure 2 and / or the base 7, or transversely to a thickness direction H of the print bed 4 and / or the support structure 2 and / or the base 7.

[0167] The print bed 4 can be flush with the support surface 7, at least in sections, or can be continuously integrated. In particular, the print bed 4 and the support surface 7 cannot overlap each other. The print bed 4 and the support surface 7 can together form at least one continuously integrated section of the first side A1 of the support structure 2.

[0168] The support structure 2 can have a longitudinal direction D extending transversely to the span direction R and the thickness direction H. The longitudinal direction D can extend transversely to the span direction R. The clamping device 3 can be arranged on a side of the support base 7 extending along the longitudinal direction D. Viewed in the thickness direction H, the clamping device 3 can be arranged on the same side of the support base 7 as the pressure bed 4, in particular on side A1.

[0169] The clamping device 3 can have two holding receptacles Y oriented towards each other along the longitudinal direction D. Ends E1 of the holding receptacles Y pointing away from each other along the longitudinal direction D can have clear openings extending transversely to the longitudinal direction D that are larger than the clear openings of two opposing ends E2 of the holding receptacles Y, also extending transversely to the longitudinal direction D. For example, the holding receptacles Y can be shaped as keyholes or keyhole-shaped, particularly in a top view along the thickness direction H.

[0170] The holding fixtures Y can be used to fix and / or handle the respective clamping device, for example by a handling robot or a manipulator. In particular, fixing devices of a handling robot or a manipulator – not shown in detail here – can be inserted into the holding fixtures and moved towards each other along the longitudinal direction of the holding fixtures Y. Such fixing devices can be pin-shaped and / or mushroom-shaped and / or designed according to the counter-mounting device 22 – as described below.

[0171] By shifting the fixing devices in opposite or converging directions, the fixing devices move from the circular sections of the holding receptacles Y into the adjacent elongated slot sections, thus creating a positive fit in one longitudinal direction of the fixing devices. This allows the clamping devices to be securely fixed and handled.

[0172] The print bed 4 can have a support side facing the support surface 7, which, for example, rests on the support surface 7, and a storage side facing away from the support surface 7. Vacuum openings V can be provided in the storage side to draw the print film in by means of a vacuum. The vacuum openings V can be arranged in and / or perpendicular to the clamping direction R, spaced equally or at different distances from each other.

[0173] Figures 2 to 4 show the embodiment of Figure 1 in a schematic rear view, in which the second side A2 of the support base 7 and / or the support structure 2, which can also be referred to as the underside, projects out of the plane of the drawing. The support base 7 can provide a bearing 8 for guiding the movement of the clamping device 5. The bearing 8 is, for example, recessed, at least partially, into the second side A2 of the support base 7 and / or the support structure 2. If the clamping device 5 is inserted into the bearing 8, the clamping device 5 can be arranged or run at a distance from or in line with the second side A2. Thus, the bearing 8 can be milled or formed into the second side A2. The bearing 8 and the clamping device 5 can be formed, at least partially, complementarily to each other in order to improve the support and guidance of the clamping device 5.

[0174] The clamping device 5 can have at least one guide receptacle 9. The support base 7, and in particular the bearing 8, can have at least one guide projection 10. The guide projection 10 can engage in the guide receptacle 9.

[0175] The guide receptacle 9 can have a larger extent L along the clamping direction R than the guide projection 10. In particular, the difference in extent L of the guide receptacle 9 and the similarly oriented extent of the guide projection 10 can determine the maximum displacement of the clamping device 5 in and / or against the clamping direction R.

[0176] The clamping device 5 is shown by way of example in Figure 2 in a position inserted maximally or completely against the clamping direction R. In the position inserted maximally or completely against the clamping direction R, an end of the guide receptacle 9 pointing in the clamping direction R can rest against a guide projection 10.

[0177] In Figure 3, the clamping device 5 is shown by way of example in a position extended to its maximum or complete extent in the clamping direction R. In the position extended to its maximum or complete extent in the clamping direction R, an end of the guide receptacle 9 pointing against the clamping direction R can rest against a guide projection 10. Between the fully retracted position and the fully extended position, and with suitable dimensioning of a pressure film clamped in the clamping devices 3, the clamping device 5 can have an operating or clamping position in which the ends of the guide receptacle 9 pointing in and against the clamping direction R are spaced apart from the guide projection 10 or the guide projections 10. During operation of the workpiece carrier 1, the clamping device 5 can be held in the operating or clamping position by tension on the tensioned pressure film.

[0178] In the illustrated embodiment, the support surface 7 has, by way of example, several guide projections 10, at least two of which are arranged one behind the other along the clamping direction R and engage in the guide receptacle 9. The two guide projections 10 arranged one behind the other along the clamping direction R can be referred to as a guide projection pair. The dimension L of the guide receptacle 9 receiving the guide projection pair can be greater than the distance between the sides of the guide projections 10 that point away from each other along the clamping direction. The difference between the dimension L of the guide receptacle 9 and the distance between the sides that point away from each other can determine the maximum displacement of the clamping device 5 in and / or against the clamping direction R.

[0179] The clamping device 5 is shown by way of example in Figure 2 in the position inserted maximally or completely against the clamping direction R. In the position inserted maximally or completely against the clamping direction R, the guide projection 10, which is arranged behind the other guide projection 10 of the guide projection pair in the clamping direction R, can bear against the end of the guide receptacle 9 pointing in the clamping direction R.

[0180] In Figure 3, the clamping device 5 is shown by way of example in a position extended to its maximum or full extent in the clamping direction R. In the position extended to its maximum or full extent in the clamping direction R, an end of the guide receptacle 9 pointing opposite to the clamping direction R can abut the guide projection 10. In the position extended to its maximum or full extent in the clamping direction R, the guide projection 10 arranged in the clamping direction R in front of the other guide projection 10 of the pair of guide projections can abut the end of the guide receptacle 9 pointing opposite to the clamping direction R.

[0181] Between the fully or completely retracted position and the fully or completely extended position, the clamping device 5 can, with suitable dimensioning of a pressure film clamped or held by the clamping devices 3, have an operating or clamping position in which the ends of the guide receptacle 9 pointing in and against the clamping direction R are spaced apart from the guide projections 10. The clamping device 5 can be held in the operating or clamping position by tension of the tensioned pressure film during operation of the workpiece carrier 1.

[0182] The clamping device 5 can have at least one guide tongue 11 projecting in the opposite direction of clamping R. The guide tongue 11 can be provided with the guide receptacle 10. The clamping device 5 can have several guide tongues 11, at least selected of which can be provided with the guide receptacle 10. The guide tongues 11 can be arranged one behind the other or side by side transversely to the clamping direction R. The guide tongues 11 can be arranged one behind the other or side by side along the longitudinal direction D of the support structure 2, which runs transversely to the clamping direction R.

[0183] The support structure 2, and for example the support floor 7, can have several guide projections 10 arranged one behind the other transversely to the clamping direction R or along the longitudinal direction D. At least one spring device 12, which applies the elastic clamping force, can be arranged between two of the guide projections 10 arranged one behind the other transversely to the clamping direction R or along the longitudinal direction D. For example, the spring device 12 can be arranged between two of the guide tongues 11. The support structure 2, and for example the support floor 7, can have several spring devices 12. Each of the spring devices 12 can be arranged between two guide projections 10 arranged side by side or one behind the other transversely to the clamping direction R or along the longitudinal direction D, or between two other spring devices 12.

[0184] The support structure 2, and for example the support base 7, can have at least one spring device receptacle 13 for receiving the spring device 12. The spring device receptacle 13 can be recessed into the support base 7. The spring device receptacle 13 can be arranged between two of the guide tongues 11. In the spring device receptacle 13, or at least in selected spring device receptacles 13, one of the spring devices 12, such as a spring element, can be arranged that applies the tension force elastically or by spring elasticity. The spring element can be, for example, a hydraulic cylinder, a pneumatic cylinder, a coil spring, a stack of disc springs, a rubber spring, or another compression spring.

[0185] As can be seen from Figure 4, the support structure 2 can have a clamping device cover plate 14. The support structure 2 and, for example, the support base 7 can have a cover receptacle 15, which can be recessed into the support structure 2 and, for example, into the support base 7. The cover receptacle 15 can be milled or formed into the support structure 2 and, for example, into the support base 7. The cover receptacle 15 can be arranged behind the guide receptacle 9 in the thickness direction H. The guide receptacle 9 can be arranged at the level of, or substantially at the level of, the spring device receptacle 13 in the thickness direction H, and furthermore, the spring device receptacle 13 can be arranged adjacent to the cover receptacle 15.

[0186] The spring device receptacle 13 can be recessed into the support structure 2 and / or the support base 7 and, for example, milled or molded. The guide receptacle 9 can be recessed into the clamping device 5 and, for example, milled or molded.

[0187] As shown by way of example in Figure 2, the mounting devices 16 of the assembly device 6 and / or the clamping device 5 – the mounting devices 16 of the clamping device 5 are hidden here and therefore not shown in detail – can have mounting recesses 17. The mounting recesses 17 of the clamping device 5 and the assembly device 6 can have a clear width or dimension W along the clamping direction R.

[0188] The sum of the extent W of at least one section of one of the mounting fixtures 17 of the clamping device 5 along the clamping direction R and the extent W of at least one section of one of the mounting fixtures 17 of the mounting device 6 along the clamping direction R can be smaller than the maximum displacement of the clamping device 5.

[0189] At least selected mounting receptacles 17 can be designed as elongated holes, at least partially. The longitudinal axis of the elongated holes can be oriented essentially along the clamping direction R. At least selected mounting receptacles 17 can be keyhole-shaped. The keyhole-shaped mounting receptacles 17 can have an elongated slot section and a circular section arranged at a longitudinal end of the elongated slot section pointing away from the support surface.

[0190] The support structure 2 and, for example, the support base 7 can have a receptacle 18 for a mounting device cover plate 19 that covers the mounting device 6. The receptacle 18 can open towards the second side A2. The receptacle 18 can be recessed into the support base 7 and, for example, milled or formed. The mounting device 6 can be screwed to the support base 7 or attached to the support base by a material bond or other force-fit and / or form-fit connection. The support structure 2 can have a predefined point P. The clamping device 5 and the mounting device 6 can be arranged substantially rotationally symmetrically with respect to the predefined point. In particular, the clamping device 5 and the mounting device 6 can be arranged rotationally symmetrically with respect to each other with respect to point P when the clamping device 5 is in the partially retracted operating or clamping position.In particular, positions where the clamping device 5 and the mounting device 6 are arranged on the support structure 2 can be arranged rotationally symmetric to the predefined point.

[0191] The clamping device 5 and optionally the mounting device 6 can be designed to be mirror-symmetrical with respect to an axis X passing through the predefined point P. The axis X can run parallel to the clamping direction R.

[0192] The predefined point P can be the center of the print bed.

[0193] Figure 5 shows a perspective sectional view of the embodiment, which is cut along axis X or section line VV in Figure 3. Another sectional view of the embodiment along axis X or section line VV in Figure 3 is shown in Figure 6. Finally, Figure 7 shows a sectional view along section line VII-VII in Figure 3.

[0194] As can be seen in Figure 5 and also in Figure 6, the guide projection 10 can have a fastening element 20 for a counter-fastening element 21 that secures the clamping device cover plate 14 to the support base 7. In Figure 5, the fastening element 20 is shown by way of example as a screw receptacle. The counter-fastening element 21 is shown by way of example as a screw screwed into the screw receptacle.

[0195] Figure 8 shows another sectional view of the embodiment, which is cut along a section line labeled VI in Figure 3. As can be seen in Figure 8, the mounting device 6 can have a mounting device 16. The clamping device 3 can have a counter-mounting device 22 for attaching the clamping device 3 to the mounting device 6. The clamping device 5 can similarly have a mounting device 16, as can be seen in Figure 7. The counter-mounting device 22 can be designed to transmit motion to the clamping device 5 and attach it to a mounting device 16 of the clamping device 5 – shown in more detail in Figure 7.

[0196] The counter-mounting device 22 can be designed in a pin-like form, at least in sections. A pin section 23 of the counter-mounting device 22 can, in its course, for example along the thickness direction H, have at least one mounting flange 24 that at least partially surrounds the pin section 23 and projects away from the pin section 23. For example, the mounting flange 24 can project away from the pin section 23 transversely to the thickness direction H or in a radial direction.

[0197] In the assembled state of the clamping device 3 shown in Figure 8, in which the clamping device 3 is mounted on the mounting device 6 – or similarly on the clamping device 5 – the pin section 23 can be arranged in the mounting receptacle 17 and, in particular, in its elongated slot section. The mounting flange 24 can rest on the side of the mounting device 6 (or similarly, the clamping device 5) facing away from the first side A1. The mounting device 6 (or the clamping device 5) can therefore be arranged, at least partially, between the mounting flange 24 and parts of the remaining clamping device 3.

[0198] The clamping device 3 can have a mounting plate 25 for mounting the clamping device 3 to the support structure 2 and, for example, to the mounting device 6 or to the clamping device 5. The clamping device 3 can further have a clamping plate 26. The clamping plate 26 can be pivotable relative to the mounting plate 25, in particular pivotable about a pivot axis. The pivot axis can run parallel to the longitudinal direction D.

[0199] The mounting plate 25 and the clamping plate 26 can have opposing clamping surfaces 27, 28. During operation of the clamping device 3, the printing film can be pressed or clamped between the clamping surfaces 27, 28 and thus held in a force-fit position. The print bed 4 can project beyond at least one of the clamping surfaces 27, 28 transversely to the pivot axis and / or in or against the thickness direction H. Furthermore, the print bed 4 can be flush with the clamping plate 4 or with a top surface of the clamping plate 4, particularly when the clamping surfaces 27, 28 are in contact with each other or a printing film is pressed against one of the clamping surfaces 28.

[0200] An elastic, and for example spring-elastic, clamping element 29 can be attached to one of the clamping surfaces 27, 28. The elastic clamping element 29 can be made of or consist of plastic or rubber. The elastic clamping element 29 can extend completely along the pivot axis along the clamping plate 26 and / or along the mounting plate 25.

[0201] In a clamping state of the clamping device 3, in which the clamping element 29 rests against the opposite clamping surface 28 or a pressure film presses against the opposite clamping surface 28, the clamping element 29 can rest against the opposite clamping surface 28 or the pressure film at least partially or continuously along the pivot axis or the longitudinal direction D. The elastic clamping element 29 can be arranged at least partially in a recess 30 provided in one of the clamping surfaces 27 to which the elastic clamping element 29 is attached. The recess 30 can be designed as a groove. The groove can have a trapezoidal cross-section. The narrow side of the trapezoid can open towards the opposite clamping surface 28. The clamping device 3 can have a spring-elastic connecting plate 31.The spring-elastic connecting plate 31 can connect the mounting plate 25 and the clamping plate 26 to each other in a non-displaceable manner and / or support each other in a spring-elastic manner.

[0202] The spring-elastic connecting plate 31 can have two mounting areas 32, 33 spaced apart from each other transversely to the pivot axis. One of the mounting areas 33 can be attached to the mounting plate 25 and the other of the mounting areas 32 to the clamping plate 26. One of the mounting areas 33 can be arranged between the other of the mounting areas 32 and the clamping surfaces 27, 28. The clamping surface 28 of the clamping plate 26 can adjoin one end of the clamping plate 26 transversely to the pivot axis (or along the clamping direction R). The other of the mounting areas 32 can adjoin the opposite end of the clamping plate 26, for example, transversely to the pivot axis or along the clamping direction R. The pivot axis can run between the mounting areas 32, 33.

[0203] On a side of the clamping device 3 facing away from the support structure 2, a clear opening or distance F can remain between the mounting plate 25 and the clamping plate 26, or between the mounting plate 25 and the connecting plate 31, when the clamping device 3 is clamped. To open the clamping device 3 and thereby move the clamping surfaces away from each other along the thickness direction H or transversely to the pivot axis, the end of the clamping plate 26 facing away from the support structure 2 can be pivoted towards the mounting plate 25, thus reducing the distance F. When the end of the clamping plate 26 facing away from the support structure 2 is in contact with the mounting plate 25, the clamping device 3 can be opened to its maximum extent. The clamping plate 26 can also have the retaining receptacles Y. At least selected vacuum openings V can have an increasing cross-section along their length, particularly from the first side A1 towards the second side A2.

[0204] For example, a section V1 of the vacuum openings V adjacent to the first side A1 can be designed as a tunnel or tube, i.e., with a constant cross-section. A funnel-shaped section V2 of the vacuum opening V can be connected to an end of the tunnel or tube-shaped section V1 that points towards the second side A2.

[0205] Figure 9 shows a complete sectional view of the workpiece carrier 1, which is cut along a plane extending parallel to the clamping direction R and the thickness direction H.

[0206] The support surface 7 can have at least one vacuum line 34 and, for example, several vacuum lines 34. At least one of the vacuum lines 34 can be connected to one of the vacuum openings V in a gas-conducting manner. The vacuum line 34 can extend through the support surface 7 in the thickness direction H. An end of the vacuum line 34 pointing towards the vacuum opening V can have a diameter that corresponds to the diameter of the end of the vacuum opening V pointing towards the vacuum line 34.

[0207] A section of the vacuum line 34 adjacent to the end of the vacuum line 34 facing the vacuum opening V can have a constant cross-section. An end of the vacuum line 34 located away from and / or pointing away from the vacuum opening V can have a cross-section that increases towards the second side A2. The vacuum line 34 can have its maximum cross-section when it terminates at the second side A2.

[0208] The support surface 7 can have several vacuum lines 34, each of which can be connected to one of the vacuum openings V in a gas-conducting manner. For example, the vacuum lines 34 can each be arranged behind one of the vacuum openings V in the thickness direction H.

[0209] The number of vacuum lines 34 of the support surface 7 can correspond to the number of vacuum lines 34. Alternatively, the number of vacuum lines 34 of the support surface 7 can be less than the number of vacuum lines 34. In order to supply all vacuum openings V with vacuum via the vacuum line(s) 34, the support structure 2 can have a connecting line 35 that gas-conducts several vacuum openings V to at least one vacuum line 34.

[0210] The connecting line 35 can extend in the longitudinal direction D and / or in the clamping direction R. If the connecting line 35 extends in the longitudinal direction D and in the clamping direction R, it can be designed as a connecting plane. For example, the print bed 4 can limit the connecting plane in the longitudinal direction D and in the clamping direction R, such as when an edge of the print bed 4 facing the second side A2 rests on the support base 7 and the edge surrounds a region that is spaced from or adjacent to the support base 7 and forms the connecting plane.

[0211] Alternatively or additionally, the support surface 7 can limit the connection plane in the longitudinal direction D and in the span direction R, for example if the pressure bed 4 rests on a curve or step of the support surface 7 facing the first side A1 and the curve or step surrounds an area that is spaced away from or adjacent to the pressure bed 4 and forms the connection plane.

[0212] Figure 10 shows a schematic side view of two clamping devices 3, which are attached, by way of example, to different and, in particular, opposite sides of a printing film 40. The sides or edges of the printing film 40 are positively fixed to the clamping devices 3 by clamping or pressing. For example, the printing film 40 can be attached to the clamping devices 3 before or after the clamping devices 3 are attached to the support structure 2 and, for example, to the clamping device 5 and the mounting device 6.

[0213] Figure 11 shows a schematic side view of the printing film 40 printed with three-dimensional screen-printed workpieces 50. The printing film 40 has been removed from the support structure 2. At least one of the clamping devices 3 may still be attached to the printing film 40. In particular, both clamping devices 3 may still be attached to the printing film 40.

[0214] A release device 60 may be provided to remove the printing film 40 from the screen-printed workpieces 50. The release device 60 may be designed as a shearing device and / or have a shearing edge 61 over which the printing film 40 can be drawn or guided to deform the printing film 40, for example by bending and / or stretching it, in order to remove the printing film 40 from the screen-printed workpieces 50, or vice versa. For example, the printing film 40 can be drawn around the shearing edge 61. A screen-printed workpiece from which the printing film 40 has already been removed is designated with the reference numeral 50A.

[0215] Figure 12 schematically illustrates a process for producing three-dimensional screen-printed workpieces as a flowchart. The same reference numerals are used below for elements that may correspond in form or function to elements of the previous embodiments.

[0216] Method 100 can repeatedly screen-print the printing film 40 in a process step 101 to produce the three-dimensional screen-printed workpieces 50. Furthermore, method 100 can include a further process step 102 in which the printing film 40 is stretched over a printing bed 4 and then repeatedly screen-printed in process step 101 to produce the three-dimensional screen-printed workpieces.

[0217] Furthermore, the process 100 can include a further process step 103 in which different edge areas of the printing film 40 are force-fitted to different clamping devices 3, wherein the clamping devices 3 are subsequently attached, in particular according to process step 104, to different sides of the support structure 2 having the printing bed 4, before the screen printing then begins in the further course according to process step 101.

[0218] Alternatively, the clamping devices 3 can first be attached to different sides of the support structure 2 which has the print bed 4, and then the different edge areas of the print film 40 can be attached to different clamping devices 3.

[0219] Furthermore, the method 100 can include a further method step 104 in which the clamping device 5 is pushed against the clamping force towards the print bed 4, approximately to the maximum or fully inserted position, before the clamping devices 3 are attached to the clamping device 5 and the mounting device 6.

[0220] Alternatively, the clamping device 5 can be pushed towards the print bed 4 against the clamping force, approximately to its fully retracted position, after one of the clamping devices 3 has been attached to the clamping device 5. This can be done, for example, by a handling robot that engages the holding fixtures Y via fixing devices. The other clamping device 3 can then be attached to the mounting fixture 6 with the clamping device 5 in its retracted position. Furthermore, one of the clamping devices 3 can first be attached to the mounting fixture 6. Then, the clamping device 5 can be pushed towards the print bed 4 against the clamping force, approximately to its fully retracted position. Afterward, another clamping device 3 can be attached to the clamping device 5.The printing film 40 can already be attached to the clamping devices 3 before these are attached to the clamping device 5 and the mounting device 6.

[0221] Alternatively, the printing film 40 can be attached to the clamping devices 3 attached to the clamping device 5 and the mounting device 6 before the clamping device 5 is moved by the clamping force, for example from the maximally or fully inserted position and towards the maximally or fully extended position.

[0222] At least the sliding of the clamping device 5 towards its maximum or fully inserted position can be performed manually by an operator or mechanically, for example by an actuator, a cylinder, or a robot. When moved mechanically, the movement can be initiated directly into the clamping device 5 or via the clamping device 3 attached to the clamping device 5.

[0223] Furthermore, the process 100 can include a further process step 102 in which the clamping force attempts to push the clamping device 5 away from the print bed 4 and keeps the printing film 40 taut over the print bed 4. This clamping state can be maintained while the three-dimensional screen-printed workpieces 50 are printed in process step 101.

[0224] Furthermore, the method can include a further process step 105 in which the clamping device 5 is moved against the clamping force towards the print bed 4 after the screen-printed workpieces 50 have been printed. Furthermore, the method can include a further process step 106 in which the clamping devices 3 are released from the support structure 2 in order to remove the printing film 40 from the print bed 4 after the clamping device 5 has been moved against the clamping force towards the print bed 4 to ensure that the clamping devices 3 can be released.

[0225] Method 100 can further comprise a process step in which the produced three-dimensional screen-printed workpieces 50 are dried and / or cured on the printing film 40. The drying and / or curing can take place while the clamping devices 3, in particular together with the printing film, are attached to the support structure 2, or after the clamping devices 3, in particular together with the printing film, have been removed from the support structure 2.

[0226] Method 100 can further include a process step 107 in which the screen-printed workpieces 50 are detached from the printing film 40. In process step 107, one of the clamping devices 3, to which the printing film 40 is attached, can be moved to pull the printing film 40 over a shearing edge 61 and thereby detach the screen-printed workpieces 50 from the printing film 40.

[0227] 1 workpiece carrier

[0228] 2 Supporting structure

[0229] 3 Clamping device

[0230] 4 print bed

[0231] 5 Clamping device

[0232] 6 Mounting device

[0233] 7 Support floor

[0234] 8 bearings

[0235] 9 Guided tour

[0236] 10 Leading advantage

[0237] 11 Lead tongue

[0238] 12 Spring device

[0239] 13 Spring device mount

[0240] 14 Clamping device cover plate 15 Cover holder

[0241] 16 assembly devices

[0242] 17 mounting images

[0243] 18 recording

[0244] 19 Mounting device cover plate 20 Fastening element

[0245] 21 Counter fastening element

[0246] 22 Counter-mounting device

[0247] 23 pen section

[0248] 24 Mounting flange

[0249] 25 Mounting plate

[0250] 26 clamping plate

[0251] 27, 28 clamping surfaces

[0252] 29 clamping element

[0253] 30 In-depth study

[0254] 31 Connecting plate 32, 33 Mounting areas

[0255] 34 Vacuum line

[0256] 35 Connecting cable

[0257] 40 printing foil

[0258] 50, 50A three-dimensional screen printing workpieces 60 removal device

[0259] 61 Shearing edge

[0260] 100 procedures

[0261] 101 Printable foil

[0262] 102 Stretch the printing film over the print bed

[0263] 103 Connect printing film with clamping devices 104 Move clamping device

[0264] 105 Move clamping device

[0265] 106 clamping devices release from supporting structure

[0266] A1 first side of the floor

[0267] A2 second side of the floor

[0268] B Operating position

[0269] D Longitudinal direction

[0270] E1, E2 Ends of the holding fixtures

[0271] F distance

[0272] H Thickness direction

[0273] L Extension of the guided image

[0274] P predefined point of the supporting structure

[0275] R clamping direction

[0276] S Gravity direction

[0277] V vacuum openings

[0278] V1, 2, 3 sections of the vacuum openings.

[0279] W Extension of the assembly recordings

[0280] X-axis

[0281] Y holding points

Claims

58 EXENTIS KNOWLEDGE GMBH 26713-EXE-PWO / NZ PATENT CLAIMS 1. Workpiece carrier (1), in particular for the production of three-dimensional screen-printed workpieces (50), with a flexible printing film (40) which has a printing surface that can be printed with three-dimensional screen-printed workpieces (50), with a support structure (2) which supports the printing film (40) at least partially and with at least one clamping device (3) for force-fit mounting of the printing film (40) on and / or on the support structure (2).

2. Workpiece carrier (1) according to claim 1, characterized by a plurality of clamping devices (3), in particular two clamping devices (3), for force-fit mounting of the printing film (40) on and / or on the support structure (2), wherein the clamping devices (3) preferably form a clamping arrangement for force-fit mounting of the printing film (40) on and / or on the support structure (2) and / or wherein the printing film (40) preferably runs between the clamping devices (3).

3. Workpiece carrier (1) according to claim 1 or 2, characterized in that the or at least one clamping device (3) is movably connected to the support structure (2) relative to the support structure (2) and / or that the or at least one clamping device (3) is immovably connected to the support structure (2) relative to the support structure (2).

4. Workpiece carrier (1) according to one of the preceding claims, characterized in that the support structure (2) has a support base (7) and a pressure bed (4) for depositing the printing film (40), wherein the pressure bed (4) is arranged on the support base (7) and / or is formed separately from the support base (7).59 5. Workpiece carrier (1) according to claim 4, characterized in that the print bed (4) has a support side which rests on the support base (7) and a storage side which points away from the support base (5), wherein vacuum openings (V) are preferably provided in the storage side in order to draw in the printing film (40) by means of a vacuum, and / or wherein vacuum openings (V) preferably extend between the storage side and the support side in order to draw in the printing film (40) by means of a vacuum.

6. Workpiece carrier (1) according to one of the preceding claims, characterized in that the support structure (2) has a clamping device (5) for clamping the printing film (40) in a clamping direction (R), wherein the clamping device (5) is preferably movably connected to the support base (7) relative to the printing bed (4) and / or relative to the support base (7) and / or wherein the clamping device (3) or at least a clamping device (3) is connected to the clamping device (5) in a way that transmits movement.

7. Workpiece carrier (1) according to claim 6, characterized in that the or at least a clamping device (3) can be repeatedly and releasably attached to the clamping device (5).

8. Workpiece carrier (1 ) according to claim 6 or 7, characterized in that the support base (7) has several lateral sides, wherein the clamping device (5) is arranged on and / or adjacent to one of the lateral sides of the support base (7).

9. Workpiece carrier (1) according to claim 8, characterized in that the clamping device (5) arranged on and / or adjacent to one of the lateral sides of the support base (7) is displaceable against an elastic clamping force pointing in the clamping direction (R) in the direction of another of the lateral sides of the support base (7).60 10. Workpiece carrier (1) according to one of the preceding claims, characterized in that the support structure (2) has a mounting device (6) formed immovably on the support structure (2), in particular a mounting device (6) connected immovably to the support base (7) relative to the pressure bed (4) and / or relative to the support floor (7), wherein the clamping device (3) is preferably attachable immovably to the mounting device (6) and / or via the mounting device (6) along a clamping direction on the support structure (2).

11. Workpiece carrier (1 ) according to claim 10, characterized in that the or at least a clamping device (3) can be repeatedly and releasably attached to the mounting device (6).

12. Workpiece carrier (1 ) according to claim 11 , characterized in that the support base (7) has several lateral sides, wherein the mounting device (6) is arranged on and / or adjacent to one of the lateral sides of the support base (7).

13. Workpiece carrier (1 ) according to one of the preceding claims, characterized in that the support structure (2) has at least one clamping device (5) for clamping the printing film (40) and / or that the support structure (2) has a fixedly arranged mounting device (6), in particular a mounting device (6) which is fixedly connected to the support base (7) relative to the printing bed (4) and / or relative to the support base (7).

14. Workpiece carrier (1) according to claim 13, characterized in that the clamping device (5) is movably connected to the support base (7) relative to the pressure bed (4) and / or relative to the support base (7).61 15. Workpiece carrier (1) according to claim 13 or 14, characterized in that the or at least a clamping device (3) can be optionally connected or connected to the clamping device (5) or to the assembly device (6) in a motion-transmitting manner.

16. Workpiece carrier (1 ) according to one of claims 13 to 15 if dependent on claim 2, characterized in that the clamping device (3) or a clamping device (3) is connectable or connected to the clamping device (5), in particular in a motion-transmitting manner to the clamping device (5), and the other clamping device (3) or another clamping device (3) is connectable or connected to the assembly device (6).

17. Workpiece carrier (1) according to one of claims 13 to 16, characterized in that the support base (7) has several lateral sides, wherein the clamping device (5) is arranged on or adjacent to one of the lateral sides of the support base (7) and the mounting device (6) is arranged on or adjacent to another of the lateral sides of the support base (7), and / or that the support base (7) extends between the clamping device (5) and the mounting device (6).

18. Workpiece carrier (1) according to claim 17, characterized in that one of the lateral sides of the support base (7) and the other of the lateral sides of the support base (7) are arranged opposite each other lateral sides of the support base (7).

19. Workpiece carrier (1) according to one of claims 13 to 18, characterized in that the pressure bed (4) is arranged and / or extends between the clamping device (5) and the mounting device (6) and / or between the lateral sides of the support base (7).62 20. Workpiece carrier (1) according to one of claims 6 to 19, characterized in that the support structure (2) and / or the support base (7) has a first side (A1) pointing in an operating position (B) of the workpiece carrier (1) against the direction of gravity (S) and a second side (A2) opposite the first side (A1), wherein the clamping device (5) is arranged or extends at least sectionally on the second side (A2).

21. Workpiece carrier (1 ) according to one of claims 6 to 20, characterized in that the support base (7) has a bearing (8) for guiding the movement of the clamping device (5).

22. Workpiece carrier (1 ) according to claim 21 , characterized in that the bearing (8) is embedded at least partially in the second side (A2) of the support base (7).

23. Workpiece carrier (1 ) according to claim 21 or 22, characterized in that the bearing (8) and the clamping device (5) are at least partially complementary to each other.

24. Workpiece carrier (1 ) according to one of claims 21 to 23, characterized in that the clamping device (5) has a guide receptacle (9) and that the bearing (8) has a guide projection (10), wherein the guide projection (10) engages in the guide receptacle (9).

25. Workpiece carrier (1) according to claim 24, characterized in that the guide receptacle (9) has a larger extent (L) along the clamping direction (R) than the guide projection (10).

26. Workpiece carrier (1) according to claim 25, characterized in that the difference in the extent (L) of the guide receptacle (9) and the extent of the guide projection (10) determines the maximum displacement of the clamping device (5) relative to the pressure bed (4) and / or to the support base (7) in and / or against the clamping direction (R).

27. Workpiece carrier (1 ) according to claims 24 to 26, characterized in that the clamping device (5) has a guide tongue (11) projecting in the opposite direction of clamping (R), wherein the guide tongue (11) is provided with the guide receptacle (9) and / or wherein the guide tongue (11) engages in a receiving structure of the support base (7).

28. Workpiece carrier (1 ) according to claims 24 to 27, characterized in that the support base (7) has several guide projections (10), wherein at least one spring device (12) applying the elastic clamping force is arranged between at least two of the guide projections (10).

29. Workpiece carrier (1) according to claim 28, characterized in that the clamping device (5) has several guide tongues (11) projecting in the opposite direction of clamping (R), wherein the guide tongues (11) are each provided with one of the guide receptacles (9) and / or each engage in a receiving structure of the support base (7).

30. Workpiece carrier (1 ) according to one of the preceding claims, characterized in that the support structure (2) and / or the support base (7) has at least one spring device receptacle (13) for receiving the spring device (12), wherein the spring device receptacle (13) is preferably arranged between two of the guide tongues (11).

31. Workpiece carrier (1 ) according to one of the preceding claims, characterized in that the support structure (2) has a clamping device cover plate (14).

32. Workpiece carrier (1 ) according to claim 31 , characterized in that the guide projection (10) has a fastening element (20) for a counter fastening element (21) which fastens the clamping device cover plate (14) to the support base (7).

33. Workpiece carrier (1 ) according to one of claims 21 to 32, characterized in that the bearing (8) has several guide projections (10), at least two of which are arranged one behind the other along the clamping direction (R).

34. Workpiece carrier (1) according to claim 33, characterized in that a guide receptacle (9) receiving the guide projections (10) has an extension (L) along the clamping direction (R) which is greater than the distance between the sides of the guide projections (10) arranged one behind the other along the clamping direction (R).

35. Workpiece carrier (1) according to claim 34, characterized in that the difference in the extent (L) of the guide receptacle (9) and the distance between the sides facing away from each other determines the maximum displaceability of the clamping device (5) in and / or against the clamping direction (R).

36. Workpiece carrier (1 ) according to one of claims 6 to 35, characterized in that the clamping device (5) and / or the mounting device (6) have mounting receptacles (17) for fastening a clamping device (3).

37. Workpiece carrier (1) according to claim 36, characterized in that the maximum displaceability of the clamping device (5) in the clamping direction (R) is greater than the sum of the extent of at least one section of one of the mounting receptacles (17) of the clamping device (5) along the clamping direction (R) and the extent of at least one section of one of the mounting receptacles (17) of the mounting device (6) along the clamping direction (R).65 38. Workpiece carrier (1 ) according to claim 36 or 37, characterized in that at least selected of the mounting receptacles (17) are designed at least partially as elongated holes, wherein a longitudinal axis of the elongated holes is oriented substantially along the clamping direction (R).

39. Workpiece carrier (1 ) according to claim 37 or 38, characterized in that at least selected of the mounting receptacles (17) are keyhole shaped, wherein the keyhole shaped mounting receptacles (17) have an elongated slot section and a circular section arranged at a longitudinal end of the elongated slot section pointing away from the support base (7).

40. Workpiece carrier (1 ) according to one of claims 13 to 39, characterized in that the support structure (2) has a predefined point (P) and the clamping device (5) and the assembly device (6) are arranged in a substantially rotationally symmetrical manner with respect to the predefined point (P), at least when the clamping device (5) is arranged in a partially inserted clamping position.

41. Workpiece carrier (1 ) according to claim 40, characterized in that the clamping device (5) is designed in a mirror-symmetrical manner with respect to an axis (X) passing through the predefined point (P).

42. Workpiece carrier (1 ) according to claim 40 or 41 , characterized in that the selected point (P) is the center of the print bed (4) or is formed by the center of the print bed.

43. Workpiece carrier (1) according to one of claims 6 to 41, characterized in that the clamping device (5) is a mounting device (16) and 66 the or at least a clamping device (6) has a counter-mounting device (22) for motion-transmitting the clamping device (3) to the clamping device (5).

44. Workpiece carrier (1) according to one of claims 10 to 43, characterized in that the assembly device (6) has a mounting device (16) and the clamping device (3) has a counter-mounting device (22) for fastening the clamping device (3) to the assembly device (6).

45. Workpiece carrier (1 ) according to claims 43 or 44, characterized in that the counter-mounting device (22) is designed at least partially in a pin-shaped form, wherein the at least partially pin-shaped counter-mounting device (22) preferably has a mounting flange (24) in its course which at least partially surrounds the pin shape and projects from the pin shape, in particular a radially projecting one.

46. ​​Workpiece carrier (1 ) according to one of the preceding claims, characterized in that the at least one clamping device (3) has a mounting plate (25) for mounting the clamping device (3) on the support structure (2) and a clamping plate (26) that is pivotable relative to the mounting plate (25) about a pivot axis.

47. Workpiece carrier (1) according to claim 46, characterized in that the mounting plate (25) and the clamping plate (26) have opposing clamping surfaces (27, 28), wherein, during operation of the clamping device (3), the pressure film (40) is clamped between the clamping surfaces (27, 28) and thereby held in a force-fit manner, wherein one of the clamping surfaces (27, 28) preferably has an elastic clamping element (29).67 48. Workpiece carrier (1) according to claim 47, characterized in that the elastic clamping element (29) is arranged at least sectionally in a recess (30) which is provided in one of the clamping surfaces (27, 28) to which the clamping element (29) is attached.

49. Workpiece carrier (1 ) according to one of claims 46 to 48, characterized in that the clamping device (3) has a spring-elastic connecting plate (31), wherein the spring-elastic connecting plate (31) preferably connects the mounting plate (26) and the clamping plate (26) to each other in a non-displaceable manner and / or holds them in a clamping position relative to each other in a spring-elastic manner.

50. Workpiece carrier (1) according to claim 49, characterized in that the connecting plate (31) has two fastening areas (32, 33) spaced apart from each other transversely to the pivot axis, wherein one of the fastening areas (32, 33) is attached to the mounting plate (25) and the other of the fastening areas (32) is attached to the clamping plate (26) and / or wherein the fastening areas (32, 33) are each spaced apart from the pivot axis.

51. Workpiece carrier (1 ) according to claim 50, characterized in that one of the fastening areas (32, 33) is arranged between the other of the fastening areas (32, 33) and the clamping surfaces (27, 28).

52. Workpiece carrier (1 ) according to claim 50 or 51 , characterized in that the clamping surface (28) of the clamping plate (26) adjoins one end of the clamping plate (26) transversely to the pivot axis and the other of the fastening areas (32) adjoins another end of the clamping plate (26) opposite one end of the clamping plate (26).

53. Workpiece carrier (1) according to one of claims 47 to 52, characterized in that the clamping element (29) extends along a direction 68 the pivot axis and / or parallel to the pivot axis, at least partially or completely along the clamping plate (26) and / or along the mounting plate (25).

54. Workpiece carrier (1 ) according to one of claims 47 to 53, characterized in that in a clamping state of the clamping device (3) in which the clamping element (29) rests against the opposite clamping surface (27, 28) or a pressure film (40) presses against the opposite clamping surface (27, 28), the clamping element (29) rests at least partially or continuously against the opposite clamping surface (27, 28) or the pressure film (40) extending along the pivot axis.

55. Workpiece carrier (1 ) according to one of the preceding claims, characterized in that the clamping device (3) has at least one holding receptacle (Y) for holding and / or handling by an external handling device and / or has two holding receptacles (Y) separated from each other along a direction of the pivot axis or along a direction parallel to the pivot axis.

56. Workpiece carrier (1) according to claim 55, characterized in that the holding fixtures (Y) have clear widths extending transversely to the pivot axis at each of the ends (E1) of the holding fixtures (Y) extending away from each other along a direction of the pivot axis or a direction parallel to the pivot axis, which are larger than the clear widths extending transversely to the pivot axis of two ends (E2) of the holding fixtures (Y) extending towards each other.

57. Workpiece carrier (1 ) according to claim 55 or 56, characterized in that the holding receptacles (Y) are keyhole shaped.

58. Workpiece carrier (1) according to one of claims 55 to 57, characterized in that the clamping plate (26) has the holding receptacles (Y). 69 59. Support structure (2), in particular for a workpiece carrier (1) for the production of three-dimensional screen-printed workpieces (50), comprising a print bed (4) for depositing a print film (40) having a printable printing surface and comprising a clamping device (5) and a mounting device (6), wherein the clamping device (5) and the mounting device (6) are arranged on different and preferably opposite sides of the print bed (4) and wherein the clamping device (6) and the mounting device (6) have mounting devices (16) which can be brought into operative contact with opposite ends of a print film (50), wherein the clamping device (6) is preferably displaceable in an orientation opposite to an elastic clamping force pointing in a clamping direction (R) towards the print bed (4).

60. Support structure (2) according to claim 59, characterized in that the support structure (2) has a support base (7) on which the clamping device (5) is arranged and / or on which the pressure bed (4) is arranged or can be arranged.

61. Support structure (2) according to claim 60, characterized in that the support base (7) has a first side (A1) on which the pressure bed (4) is arranged or can be arranged, and a second side (A2) facing away from the first side (A1), wherein the clamping device (5) is arranged at least sectionally on the second side (A2) and / or extends along the second side (A2).

62. Support structure (2) according to claim 60 or 61, characterized in that the support base (7) has a bearing (8) for guiding the movement of the clamping device (5). 70 63. Support structure (2) according to claim 62, characterized in that the bearing (8) is embedded at least partially in the second side (A2) of the support base (7).

64. Support structure (2) according to claim 62 or 63, characterized in that the bearing (8) and the clamping device (5) are at least partially complementary to each other.

65. Support structure (2) according to one of claims 62 to 64, characterized in that the clamping device (5) has a guide receptacle (9) and that the bearing (8) has a guide projection (10), wherein the guide projection (10) engages in the guide receptacle (9).

66. Support structure (2) according to claim 65, characterized in that the guide receptacle (9) has a larger extent (L) along the clamping direction (R) than the guide projection (10).

67. Support structure (2) according to claim 68, characterized in that the difference in the extent (L) of the guide receptacle (9) and the extent of the guide projection (10) determines the maximum displaceability of the clamping device (5) in and / or against the clamping direction (R).

68. Support structure (2) according to claims 65 to 67, characterized in that the clamping device (5) has a guide tongue (11) projecting in the opposite direction of clamping (R), wherein the guide tongue (11) is provided with the guide receptacle (9) and / or wherein the guide tongue (11) engages in a receiving structure of the support base (7).

69. Support structure (2) according to claims 65 to 68, characterized in that the clamping device (5) has several guide receptacles (9), wherein at least one spring device (12) applying the elastic clamping force is arranged between at least two of the guide receptacles (9). 71 70. Support structure (2) according to claim 69, characterized in that the clamping device (5) has several guide tongues (11) projecting in the opposite direction to the clamping direction, wherein the guide tongues (11) are each provided with at least one of the guide receptacles (9) and / or each engage in a receiving structure of the support base (7).

71. Support structure (2) according to claim 70, characterized in that the support base (7) has at least one spring device receptacle (13), wherein the spring device receptacle (13) is preferably arranged between two of the guide tongues (11).

72. Support structure (2) according to one of claims 65 to 71, characterized in that the support structure (2) has a clamping device cover plate (14), wherein preferably the guide projection (10) has a fastening element (20) for a counter fastening element (21) fastening the clamping device cover plate (14) to the support base (7).

73. Support structure (2) according to one of claims 65 to 72, characterized in that the bearing (8) has several guide projections (10), at least two of which are arranged one behind the other along the clamping direction (R).

74. Support structure (2) according to claim 73, characterized in that a guide receptacle (9) receiving the guide projections (10) has an extension (L) along the tension direction (R) which is greater than the distance between the outwardly facing sides of the guide projections (10) arranged one behind the other along the tension direction (R).

75. Support structure (2) according to claim 74, characterized in that the difference in the extent (L) of the guide receptacle (9) and the distance 72 the maximum displacement of the clamping device (5) in and / or against the clamping direction (R) is specified by the sides pointing away from each other.

76. Support structure (2) according to one of claims 59 to 75, characterized in that the mounting devices (16) have mounting receptacles (17), wherein preferably the maximum displaceability of the clamping device (5) is greater than the sum of the extent of at least one section of one of the mounting receptacles (17) of the clamping device (5) along the clamping direction (R) and the extent of at least one section of one of the mounting receptacles (17) of the mounting device (6) along the clamping direction (R).

77. Support structure (2) according to claim 76, characterized in that at least selected of the mounting receptacles (17) are designed at least partially as elongated holes, wherein a longitudinal axis of the elongated holes is oriented substantially along the clamping direction (R).

78. Support structure (2) according to claim 76 or 77, characterized in that at least selected of the mounting receptacles (17) are keyhole shaped, wherein the keyhole shaped mounting receptacles (17) have an elongated slot section and a circular section arranged at a longitudinal end of the elongated slot section pointing away from the support base (7).

79. Support structure (2) according to one of claims 59 to 78, characterized in that the print bed (4) has a predefined point (P) and the clamping device (5) arranged in a partially retracted clamping position and the mounting device (6) are arranged substantially rotationally symmetrically to the predefined point (P), at least when the clamping device (5) is arranged in a partially retracted clamping position. 73 80. Support structure (2) according to claim 79, characterized in that the clamping device (5) is designed to be mirror-symmetrical with respect to an axis (X) passing through the predefined point (P).

81. Support structure (2) according to claim 79 or 80, characterized in that the selected point (P) is the center of the print bed (4) or is formed by the center of the print bed.

82. Support structure (2) according to one of claims 59 to 81, characterized in that a support side of the print bed (4) rests on the support base (7) and a storage side of the print bed (4) facing away from the support base (7) has vacuum openings (V) to draw in a printing film (40) by means of a vacuum, and / or wherein vacuum openings (V) preferably extend between the storage side and the support side to draw in a printing film (40) by means of a vacuum.

83. Support structure (2) according to claim 82, characterized in that the support base has at least one vacuum line (34), wherein the vacuum line (34) is connected to at least one of the vacuum openings (V) in a gas-conducting manner.

84. Support structure (2) according to claim 82 or 82, characterized in that the vacuum openings (V) are arranged at equal or different distances from each other in and / or transversely to the clamping direction (R).

85. Support structure (2) according to one of claims 82 to 84, characterized in that the vacuum openings (V) have an increasing cross-section along their course. 74 86. Clamping device (3), in particular for a support structure (2) according to one of claims 59 to 85, for force-fit mounting of a printing film (40) having a printing surface printable with three-dimensional screen printing workpieces (50), with a counter-mounting device (22) for mounting on a clamping device (5) or the mounting device (6), in particular a support structure (2).

87. Clamping device (3) according to claim 86, characterized in that the counter-mounting device (22) is designed at least partially in a pin-shaped form, wherein the at least partially pin-shaped counter-mounting device preferably has a mounting flange (24) in its course which at least partially surrounds the pin shape and projects from the pin shape, in particular projecting radially, and / or runs around the pin shape.

88. Clamping device (3) according to claim 86 or 87, characterized by a mounting plate (25) to which the counter-mounting device (22) is attached, and / or by a clamping plate (26) that is pivotable about a pivot axis relative to the mounting plate (25).

89. Clamping device (3) according to claim 88, characterized in that the mounting plate (25) and the clamping plate (26) have opposing clamping surfaces (27, 28), wherein in operation of the clamping device (3) or the clamping surfaces (27, 28) a pressure film (40) is clamped between the clamping surfaces (27, 28), wherein one of the clamping surfaces (27, 28) preferably has an elastic clamping element (29).

90. Clamping device (3) according to claim 89, characterized in that the clamping element (29) is arranged at least sectionally in a recess (30) which is arranged in one of the clamping surfaces (27) to which the clamping element (29) is attached. 75 91. Clamping device (3) according to one of claims 88 to 90, characterized by a spring-elastic connecting plate (31), wherein the spring-elastic connecting plate (31) preferably connects the mounting plate (25) and the clamping plate (26) to each other in a non-displaceable manner and / or holds them in a clamping position relative to each other in a spring-elastic manner.

92. Clamping device (3) according to claim 91, characterized in that the connecting plate (31) has two fastening areas (32, 33) spaced apart from each other transversely to the pivot axis, wherein one of the fastening areas (32, 33) is attached to the mounting plate (25) and the other of the fastening areas (32, 33) is attached to the clamping plate (26) and / or wherein the fastening areas (32, 33) are each spaced apart from the pivot axis.

93. Clamping device (3) according to claim 91, characterized in that one of the fastening areas (32, 33) is arranged between the other of the fastening areas (32, 33) and the clamping surfaces (27, 28).

94. Clamping device (3) according to claim 92 or 93, characterized in that the clamping surface (28) of the clamping plate (26) adjoins one end of the clamping plate (26) transversely to the pivot axis and the other of the fastening areas (32) adjoins another end of the clamping plate (26) opposite one end of the clamping plate (26).

95. Clamping device (3) according to one of claims 89 to 94, characterized in that the clamping element (29) extends along a direction of the pivoting direction and / or parallel to the pivoting axis at least partially or completely along the clamping plate (26) and / or along the mounting plate (25).

96. Clamping device (3) according to one of claims 89 to 95, characterized in that in a clamping state of the clamping device (3)76 or the clamping surfaces (27, 28), in which the clamping element (29) rests against the opposite clamping surface (28) or a pressure film (40) presses against the opposite clamping surface (28), the clamping element (29) extending along the pivot axis rests at least partially or continuously against the opposite clamping surface (28) or the pressure film (40).

97. Clamping device (3) according to one of claims 89 to 96, characterized by two holding receptacles (Y) separated from each other along the pivot axis.

98. Clamping device (3) according to claim 97, characterized in that the holding receptacles (Y) have clear widths extending transversely to the pivot axis at ends (E1) extending away from each other along a direction of the pivot axis or a direction parallel to the pivot axis, which are larger than the clear widths extending transversely to the pivot axis of two ends (E2) of the holding receptacles (Y) extending towards each other.

99. Clamping device (3) according to claim 98, characterized in that the retaining receptacles (Y) are keyhole shaped.

100. Clamping device (3) according to one of claims 97 to 99, characterized in that the clamping plate (26) has the retaining receptacles (Y).

101. Retrofit kit for a support structure (2) according to one of claims 59 to 85, comprising at least two clamping devices (3) according to one of claims 86 to 100.

102. Workpiece carrier (1), in particular for the production of three-dimensional screen-printed workpieces (50) on a printing film (40), with a support structure (2) according to one of claims 59 to 85 and with at least two clamping 77 Devices (3) according to one of claims 86 to 100 for force-fit holding of a printing film (40) with a printing surface, wherein the at least two clamping devices (3) are arranged on different sides of the printing bed (4) and / or are arranged for force-fit clamping of two opposite ends of a printing film (40).

103. Workpiece carrier (1) according to claim 102, characterized in that one of the at least two clamping devices (3) is attached or attachable to the clamping device (5) in a manner transmitting movement and another of the at least two clamping devices (3) is attached or attachable to the mounting device (6) in a manner that is not displaceable relative to the print bed (4).

104. Workpiece carrier (1) according to claim 103, characterized in that one of the at least two clamping devices (3) is repeatedly detachably attached or attachable to the clamping device (5) and another of the at least two clamping devices (3) is repeatedly detachably attached or attachable to the mounting device (6).

105. Workpiece carrier (1 ) according to one of claims 102 to 104, characterized in that the at least two clamping devices (3) are clamping devices (3) according to one of claims 81 to 90 and that the print bed (4) projects at least one of the clamping surfaces (27, 28) transversely to the pivot axis and / or that the print bed (4) is aligned with the clamping plate (26) and / or a top surface of the clamping plate (26).

106. Method (100) for producing three-dimensional screen-printed workpieces in which a printing film is repeatedly printed by screen printing (101) to produce three-dimensional screen-printed workpieces in several printing processes.

107. Method (100) according to claim 106, characterized in that the printing film is stretched over a printing bed (102) and then repeatedly 78 printed by screen printing (101) in order to print three-dimensional screen-printed workpieces in several printing processes.

108. Method (100) according to claim 107, characterized in that different edge areas of the printing film are clamped with different clamping devices (103) in order to connect the printing film to the clamping devices in a force-fit manner, wherein preferably the clamping devices are attached before or after on different sides of a support structure having the printing bed (104) before the screen printing begins.

109. Method (100) according to claim 108, characterized in that the support structure is the support structure according to one of claims 59 to 85, wherein the clamping device is pushed towards the print bed against the clamping force (104) before, after or while the clamping devices are attached to the clamping device and the mounting device.

110. Method (100) according to claim 109, characterized in that the clamping force seeks to push the clamping device away from the printing bed and pulls the printing film over the printing bed while the three-dimensional screen printing workpieces are printed (101).

111. Method (100) according to claim 110, characterized in that the clamping device is moved (105) against the clamping force in the direction towards the printing bed after the screen printing workpieces have been printed (101), in particular to release the clamping devices from the clamping device and the mounting device.

112. Method (100) according to claim 111, characterized in that the clamping devices are separated from the supporting structure, in particular from the clamping pre-79 direction and the mounting device, released (106) in order to remove the printing film from the print bed after the clamping device has been moved against the clamping force towards the print bed (105).

113. Method (100) according to one of claims 106 to 112, characterized in that the three-dimensional screen-printed workpieces are dried and / or hardened on the printing film.

114. Method (100) according to claim 112 or 113, characterized in that the screen-printed workpieces are detached from the printing film (107).

115. Method (100) according to claim 114, characterized in that one of the clamping devices to which the printing film is attached is moved in order to pull the printing film over a shearing device or shearing edge and thereby release the screen-printed workpieces from the printing film (107).

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