Printhead assembly and prototype creation system

Abstract

Printhead arrangement, characterized in that it is provided in prototype production systems, wherein the prototype production system comprises a drive unit and a work platform; wherein the printhead assembly is connected to the drive unit and serves to generate a relative movement to the work platform under the drive of the drive unit; wherein the printhead assembly comprises a mounting section and an extension module, wherein the mounting section has at least one first guide element extending in a first direction, wherein the extension module has at least one second guide element also extending in the first direction, wherein the first guide element and the second guide element can interlock in the first direction; wherein the printhead assembly further comprises a locking device, wherein the locking device serves to provide forces to the assembly section and the extension module to move closer together or further apart when the first guide element and second guide element are engaged, in order to limit the movement of the extension module in a second direction perpendicular to the first direction.

Description

Cross-reference to related registrations

[0001] This application claims priority over a Chinese patent application filed with the Chinese Patent Office on March 7, 2025, under application number 202510277062.5 and titled "Printhead Assembly, Filter Assembly, Cutting Module, Writing Module and Prototype Production System". It also claims priority over a Chinese patent application filed with the Chinese Patent Office on June 20, 2025, under application number 202521279566.2 and titled "Printhead Assembly and Prototype Production System", the full content of which is hereby incorporated into this application by reference. Technical field

[0002] This application relates to 3D printing technology, in particular a printhead assembly and a prototype creation system. Background technology

[0003] 3D printing systems are a type of machine used for rapid prototyping. The most widely used 3D printing technology currently is fused deposition modeling (FDM). FDM is a digital model-based technique in which materials such as plastic are heated and liquefied, then extruded through an extruder head to build three-dimensional objects layer by layer.

[0004] To expand the application range of the aforementioned prototype creation system, various expansion modules such as laser modules, cutting modules or writing modules can be installed on the printhead assembly or drive unit.

[0005] The expansion module can be connected to the printhead assembly using screws or other threaded connections. For example, several threaded holes can be provided on the main frame of the printhead assembly, while the expansion module has corresponding through-holes. The expansion module is then attached to the main frame by inserting screws through these through-holes and threaded holes.

[0006] Alternatively, the expansion module can be connected magnetically. Magnets are attached to the expansion module and / or the main frame to secure the expansion module to the main frame using their magnetic attraction. This mounting method is simple and user-friendly. However, the magnetic attachment method is generally not reliable enough, as rapid movement of the printhead assembly or external forces can cause it to detach.

[0007] In summary, the reliable attachment of the expansion module to the printhead assembly is a problem that urgently needs to be solved. Content of the invention

[0008] The present application discloses a printhead assembly and a prototype creation system that can improve the fastening strength of an extension module to the printhead assembly.

[0009] The technical solution of the embodiment of this application is implemented as follows:

[0010] First, a printhead assembly is provided for use in prototyping equipment, the prototyping equipment comprising a drive unit and a work platform; wherein the printhead assembly is connected to the drive unit and serves or is intended to generate a relative movement to the work platform under the drive of the drive unit; wherein the printhead assembly comprises an assembly section and an extension module, the assembly section having at least one first guide element extending in a first direction, the extension module having at least one second guide element also extending in the first direction, the first guide element and the second guide element being able to interlock along the first direction;wherein the printhead assembly further comprises a locking device, the locking device serving to provide forces to the assembly section and the extension module for moving closer together or further apart when the first guide element and second guide element are engaged, in order to limit the movement of the extension module in a second direction perpendicular to the first direction.

[0011] This application provides the aforementioned technical solution by including interlocking guide elements and locking devices between the printhead assembly's mounting section and the expansion module. Once the expansion module is moved into the mounting position along the guide elements, the locking device ensures that the guide elements on the mounting section and the expansion module fit snugly against each other. This eliminates play between the guide elements, simplifying the assembly process and ensuring a stable connection.

[0012] In some embodiments, the locking device comprises at least one eccentric wheel handle assembly, wherein the eccentric wheel handle assembly comprises an eccentric wheel rotatably connected to the extension module and a handle fixedly connected to the eccentric wheel.

[0013] Based on the aforementioned technical means, the locking device is designed as an eccentric wheel handle assembly. Due to its eccentric nature, it generates a thrust force when rotated to ensure reliable locking between the first and second guide elements; the handle in this eccentric wheel handle assembly extends the lever arm and improves ease of use for the user.

[0014] In some embodiments, the assembly section further comprises a positioning unit, wherein the positioning unit comprises a first stop element and / or at least one snap-lock structure; wherein the first stop element comprises a stop tab arranged in the first direction at the end of the assembly section; wherein the snap-lock structure comprises a first snap lock formed on the assembly section and a second snap lock formed on the extension module, and wherein the first snap lock and the second snap lock interlock when the extension module slides along the first direction to the end of the assembly section under the constraint of the first guide element and the second guide element.

[0015] Based on the aforementioned technical means, a positioning unit ensures precise mounting of the expansion module to prevent excessive module slippage. The snap-lock mechanism provides mechanical locking, increasing the module's connection strength and reducing wobble.

[0016] In some embodiments, the extension module can be locked to the assembly section by means of the locking device when the extension module slides in the first direction under the constraint of the first guide element and the second guide element until the first snap lock and the second snap lock engage.

[0017] Based on the aforementioned technical means, the first and second snap locks can interlock during the user's installation of the expansion module to position it. Simultaneously, there is a noticeable change in force, allowing the user to feel that the module is properly installed.

[0018] In some embodiments, the first snap lock is a recess and the second snap lock is a projection.

[0019] Based on the aforementioned technical means, the structural design of the indentation and protrusion can improve the reliability of the snap closure.

[0020] In some embodiments, the first direction is the Z-axis of the prototype creation system.

[0021] Based on the aforementioned technical means, the expansion module can be installed along the Z-axis of the prototype production system.

[0022] In some embodiments, the assembly section along the X-axis has two first guide elements spaced apart from each other, wherein the extension module along the X-axis has two second guide elements spaced apart from each other; or the assembly section along the Y-axis has two first guide elements spaced apart from each other, wherein the extension module along the Y-axis has two second guide elements spaced apart from each other.

[0023] Based on the aforementioned technical means, two first guide elements and two second guide elements are attached at intervals along the X-axis or Y-axis to further reduce the wobbling of the extension module.

[0024] In some embodiments, the printhead assembly comprises two or more extruder heads, wherein the extruder heads are connected to the drive unit, and wherein the assembly section is located on the extruder heads.

[0025] Based on the aforementioned technical means, the problem can be solved that "a 3D printer with only one extruder head can usually only print with a single material, and the extruder head has to be removed when changing materials, which makes the operating process cumbersome." Furthermore, the problem can be resolved that "after replacing the extruder head, the user has to calibrate the position of the new extruder head, as otherwise this would significantly affect printing accuracy, undoubtedly making operation more difficult."

[0026] In some embodiments, the two extruder heads comprise a first extruder head and a second extruder head, wherein the first extruder head and the second extruder head have different opening diameters and / or the first extruder head and the second extruder head are designed to print different consumables, wherein the different consumables include consumables in different colors and / or consumables made of different materials.

[0027] Based on the aforementioned technical features, the differences between the first and second extruder heads enable the 3D printer to handle print jobs with varying accuracy requirements and effortlessly perform multi-color printing, enriching print results with diverse color layers. This versatile configuration allows the 3D printer to be adapted to a wider range of applications.

[0028] In some embodiments, the two extruder heads comprise a first extruder head and a second extruder head, wherein the print head assembly further comprises a main frame, wherein the first extruder head is fixedly connected to the main frame, and wherein the second extruder head is movably connected to the main frame.

[0029] Based on the aforementioned technical means, the problem can be solved that "a 3D printer with only one extruder head can usually only print with a single material, and the extruder head has to be removed when changing materials, which makes the operating process cumbersome." Furthermore, the problem can be resolved that "after replacing the extruder head, the user has to calibrate the position of the new extruder head, as otherwise this would significantly affect printing accuracy, undoubtedly making operation more difficult."

[0030] In some embodiments, the second extruder head can be moved along the Z-axis so that the nozzle height of the second extruder head is higher than the nozzle height of the first extruder head, in order to print using the first extruder head.

[0031] Based on the aforementioned technical means, the second extruder head can be moved upwards over the first extruder head during the operation of the first extruder head in order to avoid a collision between the second extruder head and the printed object on the printing platform.

[0032] In some embodiments, the second extruder head can be moved along the Z-axis so that the nozzle height of the second extruder head is lower than the nozzle height of the first extruder head, in order to print with the first extruder head.

[0033] Based on the above-mentioned technical means, when changing the extruder head, the second extruder head can be moved downwards so that its nozzle height is lower than that of the first extruder head, thus enabling printing with the second extruder head.

[0034] In some embodiments, the drive unit comprises a motor and synchronous belts, the motor serving to drive synchronous belts arranged in different directions in order to generate a relative movement between the printhead assembly and the work platform.

[0035] Based on the aforementioned technical means, movement of the printhead in multiple directions can be achieved.

[0036] Secondly, a prototype creation system is provided which includes a printhead assembly as described in one of the claims of the first aspect.

[0037] Based on the aforementioned technical means, the prototyping system employs a modular design that facilitates the rapid exchange of functional modules, enabling the system to meet diverse processing requirements. The interlocking guide elements and the locking mechanism ensure convenient and reliable module connection during module replacement.

[0038] In some embodiments, the expansion module is a laser module, cutting module, writing module, milling module or engraving module.

[0039] Based on the aforementioned technical means, these extension modules can be moved under the control of the drive unit of the 3D printer to perform functions such as laser engraving, cutting, writing and painting.

[0040] In some embodiments, the extension module is a laser module, wherein the drive unit serves to move the laser module in a horizontal plane in order to cut and / or engrave material.

[0041] Based on the aforementioned technical means, the movement of the laser module is precisely controlled by providing a drive unit on the printhead assembly to cut and / or engrave the material from various horizontal positions, thus creating patterns with complex shapes.

[0042] In some embodiments, a rotating device is arranged on the work platform, the rotating device serving to drive the rotation of a rotating body or an object with an irregular surface.

[0043] Based on the aforementioned technical means, it is possible to efficiently cut or engrave irregularly shaped objects, which significantly expands the application range of 3D printing devices.

[0044] In some embodiments, the laser module can emit a laser beam directed at the material to melt, vaporize, or bring the material to its flash point, with the molten or burning material being blown away by a gas stream coaxial with the laser beam.

[0045] Based on the aforementioned technical means, the molten or burning material can be blown away using a high-speed airflow coaxial with the light beam.

[0046] In some embodiments, the extension module is a cutting module, wherein the cutting module can be moved along a target path under the drive of the drive unit to cut the material to be cut.

[0047] Based on the aforementioned technical means, the cutting module can be moved along the target path by means of the drive unit to create a predefined pattern on the material to be cut.

[0048] In some embodiments, the material to be cut rests against the work platform, or the prototype creation system further includes a cutting platform that serves to position the material to be cut.

[0049] Based on the aforementioned technical means, the cutting module can be used to cut materials such as paper, foils or stickers.

[0050] In some embodiments, the expansion module is a writing module, wherein a holding device for attaching writing tools is provided on the expansion module.

[0051] Based on the aforementioned technical means, by arranging the writing tool holder on the extension module, it is made possible for the writing module to hold various types of writing tools such as hard pens (e.g. pencils or gel pens) or soft pens (e.g. brushes or felt-tip pens) to facilitate the implementation of diverse artistic effects and styles for the user. Illustration of the attached drawings Fig. Figure 1 is a schematic representation of the structure of the prototype production system provided in the embodiment of this application. Fig. Figure 2 is a schematic representation of the local structure of the printhead arrangement in Fig. 1. Fig. 3 is a view of Fig. 2 in direction A. Fig. 4 is a side view of Fig. 2. Fig. Figure 5 is a schematic cross-sectional view of the first guide element and the second guide element provided in the embodiment of this application.

[0052] The symbols and labels shown in the figures are as follows: Prototype creation system 100, printhead assembly 110, extension module 111, second guide element 1111, third side surface 11111, fourth side surface 11112, second connecting surface 1112, shaft 1113, assembly section 112, first guide element 1121, first side surface 11211, second side surface 11212, first connecting surface 1122, positioning unit 1123, first stop element 1124, stop tab 11241, snap lock structure 1125, first snap lock 11251, second snap lock 11252, flange 11253, groove 11254, eccentric wheel handle assembly 113, eccentric wheel 1131, handle 1132, bearing 1133, drive unit 120, work platform 130. Specific embodiments

[0053] To clarify the purpose, technical solution, and advantages of this application, a more detailed description is given below, accompanied by the figures provided. The described embodiments are not to be understood as limiting this application. All other embodiments obtained by those skilled in the art in the relevant field without any inventive activity also fall within the scope of protection of this application.

[0054] In the following description, she refers to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" can be the same or different subsets of all possible embodiments and can be combined without conflict.

[0055] In the following description, the terms "first\second\third" serve only to distinguish similar objects and do not represent any specific type of object. Understandably, "first\second\third" can be replaced with certain arrangements or orders where permissible, so that the embodiment of this application described here can be implemented in a different order than the one presented or described here.

[0056] Unless otherwise defined, all technical and scientific terms used in this description have the same meaning as generally understood by those skilled in the field to which the application relates. The terms used in this article serve only to describe the embodiment of this application and are not intended to limit this application.

[0057] Before the embodiments of the present application are explained in more detail, a detailed description of the existing problems with 3D printing devices will first be given.

[0058] 3D printers, also known as three-dimensional printers, are manufacturing devices with rapid prototyping capabilities and play a crucial role in many industries such as modern manufacturing and design.

[0059] The most widely used 3D printing technology currently is fused deposition modeling (FDM). FDM is a technology based on digital models in which materials such as plastic are heated and liquefied, then extruded through an extruder head. The three-dimensional object is then built up layer by layer.

[0060] The printhead assembly is one of the key components of a 3D printer. The printhead assembly includes an extruder head, which, driven by the drive unit, generates relative motion between the extruder head and the print platform. The extruder head typically consists of a heating element and a nozzle. The heating element heats the printing material to a molten state, while the nozzle extrudes the molten material to print the model onto the print platform.

[0061] For 3D printers with only one extruder head, the fixed aperture diameter and constant temperature parameters typically limit printing to a single material. Changing materials requires replacing the extruder head, which complicates the process. Furthermore, after replacing the extruder head, the user must calibrate its position; otherwise, printing accuracy will be significantly affected, further complicating operation.

[0062] To solve the problems mentioned above, you can set up multiple extruder heads in the print module or configure the extruder head so that it can be changed automatically.

[0063] This section explains the process using the example of multiple extruder heads, including the first and second extruder heads. The print head assembly is also equipped with a main frame that connects the extruder head to the 3D printer's drive unit. In the aforementioned print head assembly with two extruder heads, both extruder heads are connected to the main frame. The first extruder head is fixed to the main frame and can be referred to as the fixed extruder head; the second extruder head is movably connected to the main frame and can move in the Z-direction and can be referred to as the movable extruder head.The second extruder head can be moved upwards above the first extruder head while the first is operating, preventing a collision between the second extruder head and the print object on the build platform. When it's necessary to change the extruder head, the second extruder head moves downwards so that its nozzle height is lower than that of the first extruder head, allowing printing with the second extruder head to begin.

[0064] The first and second extruder heads can differ in many ways. For example, the first and second extruder heads mentioned above can have different extruder head sizes. For instance, the first extruder head might have an orifice diameter of 0.2 mm, while the second extruder head has an orifice diameter of 0.4 mm. By using different-sized extruder heads, the 3D printer can handle print jobs with varying accuracy requirements. When high precision and detailed print results are needed, the extruder head with the smaller orifice diameter can be selected; for scenarios where accuracy is less critical but speed or the printing of larger objects is required, the extruder head with the larger orifice diameter can be used.Alternatively, the two extruder heads can each be used to print consumables in different colors, allowing the device to effortlessly produce multi-colored prints and giving printed objects a rich color range. Or, the two extruder heads can be used for different consumables; for example, the first extruder head can be used for ABS filament, which offers good strength and heat resistance, while the second extruder head prints PLA filament, which is environmentally friendly and easy to process. This versatile configuration allows the 3D printer to be adapted to a wider range of applications.

[0065] As an alternative implementation option, a storage area for extruder heads can be set up in the 3D printer, in which several extruder heads can be placed.

[0066] When the extruder head needs to be changed, the drive unit moves the printhead assembly to the extruder head storage area. Using manipulators or other auxiliary devices, the extruder head is removed from the printhead assembly, or the printhead assembly is configured to automatically remove the extruder head. The new extruder head is then secured in the printhead assembly. After the extruder head has been replaced, the drive unit moves the printhead assembly from the extruder head storage area to the working area and calibrates the extruder head.

[0067] To expand the functionality of 3D printers and enable their use in more areas, expansion modules can be installed on the printhead assembly. Expansion modules include, but are not limited to, laser, cutting, and writing modules. These expansion modules can be moved by the 3D printer's drive unit to perform functions such as laser engraving, cutting, writing, and drawing.

[0068] Using a laser module as an example, it can emit a high-power-density laser beam to irradiate materials, causing them to melt, vaporize, or reach their flash point. Simultaneously, a high-speed airflow, coaxial to the beam, blows away the molten or burned material. When used in 3D printers, it can perform complex movements based on the drive unit's capacity, thus enabling various functions. For example, paper, wood panels, and other common materials can be placed on the print platform. Precise control of the horizontally moving laser module makes it possible to cut these materials accurately and create complex patterns with various shapes.Another example is the simultaneous control of the laser focus during the movement of the laser module, which enables internal engraving in transparent materials such as glass or acrylic. Furthermore, a rotary device can be installed on the printing platform to drive rotating bodies or irregularly shaped objects. Combined with the movement of the laser module, this allows for efficient processing such as cutting or engraving of irregularly shaped objects, thus significantly expanding the application range of 3D printers.

[0069] The cutting module can be used to cut materials such as paper, foil, or stickers. During cutting operations, the material to be cut can either be fixed to the printer's print platform or placed on a specially designed cutting platform. The cutting module is then moved along the target path by the drive unit to create a predefined pattern on the material.

[0070] In the case of an expansion module that serves as a writing module, the functionality of the 3D printer can be extended to that of an automatic writing device (also called a writing robot). The writing module is equipped with a holder for writing tools, allowing the user to attach various types of writing instruments (e.g., pencils or gel pens as hard writing tools, brushes or felt-tip pens as soft writing tools). The drive unit enables writing or drawing on paper or a drawing board.

[0071] In the relevant technologies, there are many different possibilities for mounting expansion modules.

[0072] The expansion module can be connected to the printhead assembly using screws or other threaded connections. Specifically, multiple threaded holes can be provided on the main frame of the printhead assembly, while the expansion module has corresponding through-holes. The expansion module is then attached to the main frame by inserting screws through these through-holes and threaded holes. This type of screw connection is secure and wobble-free, but to ensure a secure installation, at least three screws must be used, which makes assembly slightly more complex.

[0073] Furthermore, the expansion module can also be connected magnetically. Magnets are attached to the expansion module and / or the main frame to secure the expansion module to the main frame using the magnetic force. This mounting method is simple and user-friendly. However, the magnetic attachment method is generally not reliable enough, as rapid movement of the printhead assembly or external forces can cause it to detach.

[0074] In light of the aforementioned problems, the present application provides a printhead assembly and a prototype production system. The technical solution of the application is explained in detail below in conjunction with the accompanying drawings.

[0075] The present embodiment of the application initially provides a printhead arrangement that is intended for use in prototype production facilities. Fig. Figure 1 shows a schematic structural view of the prototype production system provided in the present application, and Fig. Figure 2 is an enlarged view of the printhead assembly, and the Fig. 3 and Fig. 4 are the view in direction A and the side view from Fig. 2.

[0076] The in Fig. The prototype production system 100 shown comprises a printhead assembly 110, a drive unit 120 and a work platform 130.

[0077] The print head assembly 110 is connected to the drive unit 120 to create a relative displacement between the drive unit 120 and the work platform 130 for 3D printing, engraving, cutting and other operations on the work platform 130.

[0078] The structural form of the drive unit 120 can be varied. For example, the drive unit 120 can comprise a motor and a spindle, with multiple spindles arranged along the X, Y, and Z axes. The motor drives the spindle into rotation, allowing the spindle nut to move along the spindle's axis, thereby moving the printhead assembly 110 along the X, Y, and Z axes. Alternatively, the drive unit 120 can also comprise a motor and a synchronous belt, with the motor driving the pulley, which in turn drives the synchronous belt. By arranging transmission mechanisms for the synchronous belt in different directions, movement of the printhead in multiple directions is enabled.

[0079] See at the same time Fig. 1 to Fig. 3, the printhead assembly 110 comprises an extension module 111 and a mounting section 112.

[0080] In this exemplary embodiment of the application, the extension module 111 can also be referred to as a function module, plug-in module or extension module.

[0081] The expansion module 111 can be the aforementioned laser module, cutting module, or writing module, or it can also be a milling module, engraving module, etc. This application does not further restrict this.

[0082] Mounting section 112 can be the main frame of the print head assembly 110, with this main frame designed to accommodate the extruder head. This means that in this case, the expansion module 111 and the extruder head are mounted simultaneously on the main frame. Alternatively, in some implementations where the extruder head is directly connected to the drive unit 120 of the 3D printer, mounting section 112 can be attached to the extruder head.

[0083] The assembly section 112 comprises a first guide element 1121, and a second guide element 1111 is attached to the extension module 111. The first guide element 1121 and the second guide element 1111 both extend along the first direction, this first direction being the assembly orientation of the extension module 111.

[0084] In the example in Fig. 1. The first direction corresponds to the Z-axis of the prototype production system 100, meaning that the expansion module 111 can be installed along the Z-axis of the prototype production system 100. As a possible implementation option, this first direction could also correspond to the X-axis or Y-axis.

[0085] This means that the expansion module 111 can also be installed in the forward-backward direction or in the left-right direction of the prototype creation system 100.

[0086] See further Fig. 1. The first guide element 1121 projects outwards from the first connecting surface 1122 of the assembly section 112. The first guide element 1121 can also be referred to as a guide rail. Correspondingly, the second guide element 1111 is a guide groove recessed inwards from the second connecting surface 1112 of the extension module 111. The first connecting surface 1122 and the second connecting surface 1112 are the two surfaces that adhere to each other on the assembly section 112 and the extension module 111, respectively.

[0087] The cross-sectional shape of the first guide element 1121 and the second guide element 1111 in Fig. 1 is T-shaped, wherein the first guide element 1121 is a projecting T-shaped guide rail and the second guide element 1111 is a T-shaped guide groove 11254. This structure allows the first guide element 1121 and the second guide element 1111 to interlock, ensuring the limitation of the extension module 111 in directions other than the first direction.

[0088] It is understood that the aforementioned first guide element 1121 and second guide element 1111 with T-shaped cross-section serve only as examples. The cross-section of the first guide element 1121 and the second guide element 1111 can also be trapezoidal, Y-shaped, or another shape. This embodiment of the present application does not restrict this.

[0089] It is also understandable that the present embodiment of the application does not provide for any limit on the number of the aforementioned first guide element 1121 and the second guide element 1111. A Fig. The first guide element 1121 and the second guide element 1111 shown are only an example; the number of first guide elements 1121 and second guide elements 1111 can be multiple. For example, two first guide elements 1121 and two second guide elements 1111 can be attached at intervals along the X-axis or Y-axis to reduce the wobble of the extension module 111 to some extent.

[0090] It should also be noted that the present embodiment of the application does not provide for any limit on the number of the aforementioned first guide element 1121 and the second guide element 1111.

[0091] The in Fig. The first guide element 1121, projecting outwards, and the second guide element 1111, notched inwards, shown in Figure 1, serve only as an example. As an alternative implementation, the first guide element 1121 can be a groove 11254 formed in the assembly section 112, and the second guide element 1111 is a projecting rail structure formed on the extension module 111.

[0092] The printhead assembly 110 also includes a locking device which serves to provide forces to the assembly section 112 and the extension module 111 for mutual approach or separation when the first guide element 1121 and the second guide element 1111 are engaged, so that the first guide element 1121 and the second guide element 1111 are firmly in contact with each other.

[0093] The locking device mentioned above can be attached either to the extension module 111 or to the mounting section 112.

[0094] The locking device is attached to the mounting section 112 as an example. After the extension module 111 has been mounted in the first direction, the extension module 111 can be locked to the mounting section 112 by means of the locking device, thereby fixing the extension module 111.

[0095] The locking device 113 can provide a force that either brings the extension module 111 and the mounting section 112 closer together or separates them, so that the opposing surfaces of the first guide element 1121 and the second guide element 1111 fit tightly together, thereby eliminating the gap between them and preventing wobbling of the extension module 111.

[0096] The locking device 113 can be an automatic locking device or a manual locking device.

[0097] For an automatic locking device, this can be based on a mechanical mechanism, for example, by attaching an elastic element to the side of the mounting section 112 facing the extension module 111. After the extension module 111 is properly installed, this elastic element can press against it and exert a force that pushes the extension module 111 away from the mounting section 112, thus bringing the first guide element 1121 and the second guide element 1111 tightly into contact. The automatic locking device can also be implemented using an automatic control method. For example, an electric push-rod or pull-rod actuator can be installed in the mounting section 112.Once the assembly section 112 is attached in place, the extension module 111 is moved in a direction away from the assembly section 112 by means of the electric push or pull rod drive in order to eliminate the gap between the first guide element 1121 and the second guide element 1111.

[0098] The manual locking device can, for example, be a locking latch. After the extension module 111 has been installed, the user can engage the locking latch to eliminate the gap between the first guide element 1121 and the second guide element 1111.

[0099] Based on the aforementioned technical means, guide elements and interlocking locking devices are installed between the mounting section 112 of the printhead assembly 110 and the extension module 111. After the extension module 111 has been moved into the mounting position along the extension direction of the guide elements, the locking action of the locking element ensures that the guide elements on the mounting section 112 and the extension module 111 are tightly seated against each other. This eliminates the gap during sliding, enabling simple and reliable assembly.

[0100] Fig. Figure 5 shows one possible implementation of the first control element 1121 and the second control element 1111. As in Fig. As shown in Figure 5, the cross-sectional profile of the first guide element 1121 and the second guide element 1111 has a trapezoidal shape. The first guide element 1121 has opposing first side surface 11211 and second side surface 11212, while the second guide element 1111 has opposing third side surface 11111 and fourth side surface 11112. After the first guide element 1121 engages with the second guide element 1111, the first side surface 11211 lies close to the third side surface 11111, and the second side surface 11212 lies close to the fourth side surface 11112; and the respective adjacent surfaces are arranged parallel to each other. At the same time, these adjacent surfaces are not rigidly joined to allow relative sliding between the first guide element 1121 and the second guide element 1111.

[0101] The dashed line in Fig. Figure 5 shows the state when the first guide element 1121 and the second guide element 1111 are in close contact. When the locking device is used to apply forces in opposite directions to the first guide element 1121 and the second guide element 1111, the thrust force F provided by the locking device is resolved, due to the inclined surfaces, into a first partial force F1, acting perpendicular to the inclined surface, and a second partial force F2, directed horizontally outwards. The first partial force F1, perpendicular to the inclined surface, causes the adjacent surfaces to adhere tightly to one another, while the second partial force F2, acting horizontally, ensures that the first guide element 1121 and the second guide element 1111 are restrained in the horizontal direction.

[0102] In some embodiments, the locking device can be configured as shown in the Fig. 3 and Fig. 4 eccentric wheel handle arrangement 113 shown.

[0103] In some embodiments, the eccentric wheel handle assembly 113 can be attached to the extension module 111.

[0104] The eccentric wheel handle assembly 113 comprises an eccentric wheel 1131 and a handle 1132 fixedly connected to the eccentric wheel 1131, the handle 1132 being attached to the outside of the eccentric wheel 1131 in the direction of its diameter; the eccentric wheel 1131 being rotatably connected to the extension module 111, with a deviation between the center of rotation and the geometric center of the outer edge of the eccentric wheel 1131. The distance between the center of rotation and the geometric center corresponds to the eccentric distance of the eccentric wheel 1131. This eccentric wheel handle assembly 113 is also referred to as a clamping cam.

[0105] When the handle 1132 is turned, the outer edge of the eccentric wheel 1131 approaches and finally abuts the surface of the mounting section 112 facing the extension module 111 (i.e., the previously mentioned first connecting surface 1122). This exerts a thrust force away from the mounting section 112 onto the extension module 111, allowing the first guide element 1121 and the second guide element 1111 to fit tightly together. Simultaneously, the friction between the outer edge of the eccentric wheel 1131 and the mounting section 112 provides additional locking of the extension module 111, thereby increasing the fastening security.

[0106] It is understandable that, to prevent jamming when sliding the extension module 111 in the direction of the first axis, a gap inevitably exists between the first guide element 1121 and the second guide element 1111. The aforementioned eccentric wheel handle assembly 113 exerts pressure by applying a thrust force, allowing the first guide element 1121 and the second guide element 1111 to lie close together, thereby eliminating the sliding gap and improving assembly accuracy.

[0107] Based on the aforementioned technical means, the locking device is designed as an eccentric wheel handle assembly 113. Due to its eccentric feature, it generates a thrust force when rotated to ensure reliable locking between the mounting section 112 and the extension module 111; the handle 1132 in this eccentric wheel handle assembly 113 extends the lever arm and improves ease of use for the user.

[0108] In some embodiments, the outer edge of the eccentric wheel 1131 is covered with a material capable of elastic deformation. For example, the outer edge of the eccentric wheel 1131 may be coated with rubber or have an elastic material such as rubber applied to its outer surface. Such materials can deform elastically within a certain range. When the handle 1132 rotates the eccentric wheel 1131 and the outer edge of the eccentric wheel 1131 comes into contact with the second connecting surface 1112, the deformation of the elastic material allows the eccentric wheel 1131 to continue rotating, further increasing the thrust provided by the eccentric wheel 1131. At the same time, this elastic material can also provide greater friction to prevent springback and reversal of the eccentric wheel 1131, thus making the locking mechanism more secure.

[0109] In some embodiments, the eccentric wheel handle assembly 113 also includes a bearing 1133, which is arranged between the eccentric wheel 1131 and the extension module 111.

[0110] Specifically, the extension module 111 has a shaft 1113 which is mounted in a raised position on its side wall. The inner and outer rings of the bearing 1133 are each connected to the outer circle of the shaft 1113 and the bore of the bearing 1133 of the eccentric wheel 1131.

[0111] In this embodiment of the application, the type of the aforementioned bearing 1133 is not specifically restricted; the bearing 1133 can be a rolling bearing 1133 or a plain bearing 1133. The rolling bearing 1133 can be a ball bearing 1133 or a roller bearing 1133.

[0112] Based on the above-mentioned technical means, the bearing 1133 in the eccentric wheel handle assembly 113 can reduce the frictional resistance when rotating the eccentric wheel 1131, ensure the smoothness of the locking movement, and at the same time reduce mechanical wear and extend the service life of the locking device.

[0113] In the embodiment described in this application, the number of eccentric wheel handle assemblies 113 can be one, wherein this single eccentric wheel handle assembly 113 is arranged transversely on one side of the extension module 111; or the number of eccentric wheel handle assemblies 113 can be two, wherein these two eccentric wheel handle assemblies 113 are arranged symmetrically transversely on both sides of the extension module 111. The arrangement of two eccentric wheel handle assemblies 113 can further increase the fastening strength.

[0114] In some embodiments, the above-mentioned eccentric wheel handle assembly 113 also includes a stop element arranged axially at the end of the shaft 1113, located away from the extension module 111. This stop element at the shaft end is fixedly connected to the shaft 1113 and serves for the axial positioning of the bearing 1133 and the eccentric wheel 1131.

[0115] For example, the stop element at the shaft end can be a stop tab that is attached to the end of the shaft 1113 by means of screws or other threaded connections; or the stop element at the shaft end can also be an elastic retaining ring that is placed on the shaft 1113 and rests against the bearing 1133.

[0116] Based on the above-mentioned technical means, a stop element is attached to the shaft end of the eccentric wheel handle assembly 113, which, by axial positioning, prevents the bearing 1133 and the eccentric wheel 1131 from being displaced along the shaft in order to ensure the structural stability of the locking device.

[0117] In the present embodiment of the application, the assembly section 112 also includes a positioning unit 1123, which serves to position the extension module 111 in the direction of the first direction. The positioning unit 1123 comprises a first stop element 1124 and / or at least one snap-lock structure 1125.

[0118] As in Fig. As shown in Figure 1, the first stop element 1124 can be a stop tab 11241 attached to the end of the assembly section 112 in the first direction. When the extension module 111 slides along the first direction to the end of the assembly section 112 under the constraint of the first guide element 1121 and the second guide element 1111, the end of the extension module 111 can abut the stop tab 11241 in the first direction.

[0119] The first stop element 1124 mentioned above can be manufactured integrally with the main body of the assembly section 112, or the first stop element 1124 can be a structure separate from the main body of the assembly section 112, which is combined with the main body of the assembly section 112 by screw connections or similar methods.

[0120] The snap-lock structure 1125 comprises a first snap lock 11251 formed on the assembly section 112 and a second snap lock 11252 formed on the extension module 111.

[0121] When the extension module 111 slides along the first direction to the end of the assembly section 112 under the constraint of the first guide element 1121 and the second guide element 1111, the first snap lock 11251 and the second snap lock 11252 engage.

[0122] Based on the aforementioned technical means, the positioning unit 1123 enables precise mounting of the expansion module 111 to prevent excessive module slippage. The snap-lock structure 1125 provides a mechanical locking mechanism that increases the connection strength of the module and reduces wobble.

[0123] In some embodiments, the first snap lock 11251 extends from the edge of the first connecting surface 1122 of the assembly section 112 in a direction away from the first connecting surface 1122. The second snap lock 11252 is formed on the side wall of the extension module 111, this side wall being perpendicular to the second connecting surface 1112 of the extension module 111.

[0124] Alternatively, as a possible implementation option, the first snap lock 11251 is formed on the first connecting surface 1122, and the second snap lock 11252 is formed on the second connecting surface 1112.

[0125] For example, how in Fig. As shown in Figure 1, the first snap lock 11251 is a projection, and the second snap lock 11252 is a recess. The projection has a flange 11253 extending outwards away from the first connecting surface 1122, and the recess has a groove 11254 that is compatible with the aforementioned flange 11253. When the extension module 111 slides along the first direction to the end of the mounting section 112, constrained by the first guide element 1121 and the second guide element 1111, the aforementioned flange 11253 engages in the groove 11254, causing the first snap lock 11251 and the second snap lock 11252 to interlock and thus enabling the positioning of the extension module 111.

[0126] Based on the aforementioned technical means, the structural design of the protrusion and indentation can improve the reliability of the snap lock. The fit between the flange 11253 and the groove 11254 prevents the module from shifting towards the vertical connection surface. Simultaneously, the snap lock structure 1125 can be clicked together by the user during the installation of the expansion module 111 to position it. This creates a noticeable change in force, allowing the user to feel that the module is correctly installed.

[0127] Using the example of the in Fig. The snap-lock structure 1125 shown in 1 is the first snap lock 11251 in Fig. 1 is rigidly connected at one end in the first direction to the mounting section 112, while the other end is free and forms a cantilever structure. The flange 11253 located at the free end can be elastically deformed within a certain range.

[0128] The flange 11253 on the first snap lock 11251 and the groove 11254 on the second snap lock 11252 are each trapezoidal. When the extension module 111 slides and the first snap lock 11251 comes into contact with the second snap lock 11252, the edge of the second snap lock 11252 initially contacts the inclined side of the trapezoidal flange 11253. If a force is applied in the first direction, this inclined side generates a partial force directed towards the first connecting surface 1122, causing the first snap lock 11251 to deform elastically, allowing the extension module 111 to continue moving in the first direction.When the extension module 111 is moved further to the target position at the end of the assembly section 112, the first snap lock 11251 returns to its initial state, and the flange 11253 of the first snap lock 11251 slides into the groove 11254 of the second snap lock 11252, so that the first snap lock 11251 and the second snap lock 11252 interlock.

[0129] It should also be noted that the in Fig. The structure of the first snap fastener 11251 and the second snap fastener 11252 shown in Figure 1 serves only as an example. As one possible implementation, the first snap fastener 11251 and the second snap fastener 11252 are each designed as a recess and a projection, respectively.

[0130] It is understandable that the number of snap-lock structures is 1125, at least one as in Fig. can be 1; or in some implementation possibilities, the number of snap-lock structures 1125 can be two or more, wherein these two or more snap-lock structures 1125 can be distributed on different sides of the extension module 111, for example, snap-lock structures 1125 can be attached to both sides of the extension module 111 in the width direction.

[0131] It is also understandable that the positioning unit 1123 may comprise only the first stop element 1124 or only the snap-lock structure 1125, or it may include both the first stop element 1124 and the snap-lock structure 1125 simultaneously. This is not specifically restricted in this application example.

[0132] Based on the printhead arrangement 110 disclosed in the above-mentioned embodiment, the present application also provides a prototype production system 100, wherein the prototype production system 100 can be a prototype production system 100 that has multiple functions such as 3D printing, laser engraving, cutting, and writing. The structure of the prototype production system 100 is described in Fig. 1 shown.

[0133] The prototype production system 100 provided in the exemplary embodiment comprises a printhead assembly 110, a drive unit 120, and a work platform 130. The printhead assembly 110 is connected to the drive unit 120 and serves to generate a relative movement to the work platform 130 under the drive of the drive unit 120. The printhead assembly 110 comprises a mounting section 112 and an extension module 111, wherein the mounting section 112 has a first guide element 1121 extending in a first direction, and wherein the extension module 111 has at least a second guide element 1111, which also extends in the first direction, and wherein the first guide element 1121 and the second guide element 1111 can interlock.

[0134] The printhead assembly 110 also includes a locking device, wherein the locking device serves to provide forces to the assembly section 112 and the extension module 111 for mutual approach or separation in the state of the first guide element 1121 and second guide element 1111, so that the first guide element 1121 and the second guide element 1111 are firmly in contact with each other.

[0135] The printhead assembly 110 of the prototype production system 100, provided in the embodiment of this application, has a modular design that supports the rapid exchange of functional modules, enabling the system to meet a wide range of processing requirements. When replacing the expansion module 111, the interlocking of the guide elements and the locking action of the locking device make the module replacement process convenient and the module connection reliable.

[0136] In some embodiments, the locking device comprises at least one eccentric wheel handle assembly 113, wherein the structure of the eccentric wheel handle assembly 113 is described in the Fig. 3 and Fig. Figure 4 shows the eccentric wheel handle assembly 113 comprising an eccentric wheel 1131 rotatably connected to the extension module 111 and a handle 1132 fixedly connected to the eccentric wheel 1131; this eccentric wheel handle assembly 113 serves the following purpose: In the state in which the first guide element 1121 and the second guide element 1111 are engaged, the rotation of the eccentric wheel 1131 causes the outer edge of the eccentric wheel 1131 to bear against the side of the mounting section 112 facing the extension module 111, in order to provide the extension module 111 with a thrust force directed away from the mounting section 112, thereby causing the first guide element 1121 and the second guide element 1111 to lie close together.

[0137] In this technical concept, the thrust of the eccentric wheel handle assembly 113 enables a tight fit of the guide elements, thereby reducing the gap between the modules. The rotary movement of the handle 1132 allows for rapid locking and release, improving the exchange efficiency of the functional modules of the prototype production system 100.

[0138] In some embodiments, the eccentric wheel handle assembly 113 also includes a bearing 1133; wherein a shaft 1113 is arranged on the extension module 111, projecting from the extension module 111. The inner ring of the bearing 1133 is mounted on the shaft 1113, and the bore of the bearing 1133 of the eccentric wheel 1131 is mounted on the outer ring of the bearing 1133.

[0139] Based on the above-mentioned technical means, the bearing 1133 between the shaft 1113 and the eccentric wheel 1131 can reduce the frictional resistance when rotating the eccentric wheel 1131, ensure the smoothness of the locking movement, and at the same time reduce mechanical wear and extend the service life of the locking device.

[0140] In some embodiments, the aforementioned eccentric wheel handle assembly 113 also includes a stop element arranged axially at the end of the shaft 1113, located away from the extension module 111. This stop element at the shaft end is fixedly connected to the shaft 1113 and serves for the axial positioning of the bearing 1133 and the eccentric wheel 1131.

[0141] Based on the above-mentioned technical means, a stop element is attached to the shaft end of the eccentric wheel handle assembly 113, which, by axial positioning, prevents the bearing 1133 and the eccentric wheel 1131 from being displaced along the shaft in order to ensure the structural stability of the locking device.

[0142] In some embodiments, the assembly section 112 further comprises a positioning unit 1123, wherein the positioning unit 1123 comprises a first stop element 1124 and / or at least one snap-lock structure 1125; wherein the first stop element 1124 comprises a stop tab arranged in the first direction at the end of the assembly section 112; wherein the snap-lock structure 1125 comprises a first snap lock 11251 formed on the assembly section 112 and a second snap lock 11252 formed on the extension module 111, and wherein the first snap lock 11251 and the second snap lock 11252 interlock when the extension module 111 slides along the first direction to the end of the assembly section 112 under the constraint of the first guide element 1121 and the second guide element 1111.

[0143] Based on the aforementioned technical means, the positioning unit 1123 enables precise mounting of the expansion module 111 to prevent excessive module slippage. The snap-lock structure 1125 provides a mechanical locking mechanism that increases the connection strength of the module and reduces wobble.

[0144] In some embodiments, the first snap lock 11251 extends from the mounting section 112 near the edge of the first connecting surface 1122 of the extension module 111 in a direction away from the first connecting surface 1122. The second snap lock 11252 is formed on the side wall of the extension module 111, the side wall being a surface of the extension module 111 perpendicular to the second connecting surface 1112. The second connecting surface 1112 is the surface of the extension module 111 that abuts the first connecting surface 1122. The first snap lock 11251 is a projection with a flange 11253 that extends outward and away from the first connecting surface 1122. The second snap lock 11252 is a recess with a groove 11254 that fits the flange 11253. When the extension module 111 is moved to the end of the assembly section 112, the flange 11253 can engage in the groove 11254.

[0145] The embodiment of the present application further provides a prototype production system 100, wherein the prototype production system 100 can be a cutting machine.

[0146] The prototype production system 100 provided in the exemplary embodiment comprises a cutting module, a drive unit 120 (not shown in the figure) and a work platform 130, wherein the cutting module comprises a cutting knife holder and a cutting knife.

[0147] One end of the cutting blade holder is connected to the drive unit 120, while the other end is connected to the cutting blade.

[0148] The material to be cut is mounted on the top of the work platform 130. After being connected to the drive unit 120, the cutting module can perform a relative movement to the work platform 130 to process the aforementioned material.

[0149] The present embodiment of the application does not restrict the specific type of material to be cut; the material to be cut can be, for example, paper, foil or the like.

[0150] The present embodiment of the application does not limit the number of material layers to be cut; the material to be cut can be single-layered or multi-layered.

[0151] Multi-layered materials can consist of a sticker body and a backing paper joined together, or multi-layered materials can also consist of composite films of different thicknesses.

[0152] Based on the aforementioned embodiment of the writing module, the embodiment of the present application further provides a prototype creation system 100, wherein the prototype creation system 100 can be a writing robot. The prototype creation system 100 comprises a writing module, a drive unit 120, and a work platform 130.

[0153] The prototype creation system 100 also includes a housing that forms a receiving compartment, a writing module, a drive unit 120 and a work platform 130, which are arranged in the receiving compartment.

[0154] The writing module comprises the writing tool holder and the writing tool itself. One end of the writing tool holder is designed for connection to the writing tool, while the other end is connected to the drive unit 120. The writing tool can perform a relative movement to the work platform 130 under the drive of the drive unit 120, thus enabling functions such as writing, drawing, and coloring on the writing medium.

[0155] In this embodiment of the application, the category of writing instrument includes a pen with a hard tip or a brush.

[0156] With renewed reference to Fig. 1. In some embodiments, this is the prototype production facility 100 according to Fig.The extension module 111 shown is a writing module. This writing module comprises a writing tool holder and the writing tool itself; one end of the holder is connected to the printhead assembly 110, while the other end is connected to the writing tool. The writing tool is used to write on a writing medium on the work platform 130 by means of the drive unit 120.

[0157] The expansion module 111 is set up as a writing module, thereby expanding the application range of the prototype creation system 100.

[0158] In some embodiments, the extension module 111 in the printhead assembly 110 is the cutting module or writing module described above according to one of the preceding embodiments.

[0159] In the description of the application, it is understood that the azimuthal or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are azimuthal or positional relationships based on the accompanying drawings and serve to simplify the description of the application and are not intended to indicate or suggest that the arrangement or component referred to has a particular orientation and must be built and operated in a particular orientation, and are therefore not to be understood as a limitation of the application.

[0160] When describing the application, it should be noted that the terms "install," "connect," "connect," and "fasten" should be interpreted broadly unless expressly stated otherwise or limited. This could refer, for example, to a permanent connection, a detachable connection, a one-piece connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, a connection within two elements, or an interaction of both elements, unless expressly limited otherwise. The specific meaning of the aforementioned terms in the context of the application should be readily apparent to a person skilled in the art.

[0161] Unless expressly stated otherwise and limited, the first feature being "above" or "below" the second feature of the application may imply direct contact between the first and second features, or it may imply that the first and second features are not in direct contact but rather through an additional medium. Furthermore, the first feature being "above," "above," or "on top of" the second feature means that the first feature is directly and diagonally above the second feature, or simply indicates that the first feature is horizontally higher above the second feature. The first feature being "below," "below," or "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicates that the first feature is horizontally lower below the second feature.

[0162] In the description of this specification, the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" refer to the specific features, structures, materials, or properties described in connection with the embodiment or examples and included in at least one embodiment or example of the application. In this description, the schematic expressions of the above terms need not refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined appropriately in one or more embodiments or examples.Furthermore, the various embodiments or examples described in this description and the features of the different embodiments or examples can be combined with each other, provided that they do not contradict each other.

[0163] The above description is only a preferred embodiment of the application and is not intended to limit the scope of protection of the application. Any modification, equivalent replacement, improvement, etc., which is consistent with the spirit and principles of the application, falls within the scope of protection of the application.

Claims

[1] Printhead assembly, characterized by that it is intended for use in prototype production facilities, the prototype production facility comprising a drive unit and a work platform; wherein the printhead assembly is connected to the drive unit and serves to generate a relative movement to the work platform under the drive of the drive unit; wherein the printhead assembly comprises a mounting section and an extension module, wherein the mounting section has at least one first guide element extending in a first direction, wherein the extension module has at least one second guide element also extending in the first direction, wherein the first guide element and the second guide element can interlock in the first direction; wherein the printhead assembly further comprises a locking device, wherein the locking device serves to provide forces to the assembly section and the extension module to move closer together or further apart when the first guide element and second guide element are engaged, in order to limit the movement of the extension module in a second direction perpendicular to the first direction. [2] Printhead arrangement according to claim 1, characterized by that the locking device comprises at least one eccentric wheel handle assembly, wherein the eccentric wheel handle assembly comprises an eccentric wheel rotatably connected to the extension module and a handle fixedly connected to the eccentric wheel. [3] Printhead arrangement according to claim 1, characterized bythat the assembly section further comprises a positioning unit, wherein the positioning unit comprises a first stop element and / or at least one snap-lock structure; wherein the first stop element comprises a stop tab arranged in the first direction at the end of the assembly section; wherein the snap-lock structure comprises a first snap lock formed on the assembly section and a second snap lock formed on the extension module, and wherein the first snap lock and the second snap lock interlock when the extension module slides along the first direction to the end of the assembly section under the constraint of the first guide element and the second guide element. [4] Printhead arrangement according to claim 3, characterized by, that the extension module can be locked to the assembly section by means of the locking device when the extension module slides in the first direction under the constraint of the first guide element and the second guide element until the first snap lock and the second snap lock engage. [5] Printhead arrangement according to claim 3, characterized by that the first snap lock is an indentation and the second snap lock is a protrusion. [6] Printhead arrangement according to claim 1, characterized by , that the first direction is the Z-axis of the prototype creation system. [7] Printhead arrangement according to claim 1, characterized bythat the assembly section along the X-axis has two first guide elements spaced apart from each other, wherein the extension module along the X-axis has two second guide elements spaced apart from each other; or wherein the assembly section along the Y-axis has two first guide elements spaced apart from each other, wherein the extension module along the Y-axis has two second guide elements spaced apart from each other. [8] Printhead arrangement according to claim 1, characterized by that the printhead assembly comprises two or more extruder heads, wherein the extruder heads are connected to the drive unit, and wherein the assembly section is located on the extruder heads. [9] Printhead arrangement according to claim 8, characterized bythat the two extruder heads comprise a first extruder head and a second extruder head, wherein the first extruder head and the second extruder head have different opening diameters and / or the first extruder head and the second extruder head are designed to print different consumables, wherein the different consumables include consumables in different colors and / or consumables made of different materials. [10] Printhead arrangement according to claim 8, characterized by that the two extruder heads comprise a first extruder head and a second extruder head, wherein the print head assembly further comprises a main frame, wherein the first extruder head is fixedly connected to the main frame, and wherein the second extruder head is movably connected to the main frame. [11] Printhead arrangement according to claim 10, characterized by, that the second extruder head can be moved along the Z-axis so that a nozzle height of the second extruder head is higher than a nozzle height of the first extruder head, in order to print using the first extruder head. [12] Printhead arrangement according to claim 10, characterized by , that the second extruder head can be moved along the Z-axis so that the nozzle height of the second extruder head is lower than the nozzle height of the first extruder head, in order to print with the second extruder head. [13] Printhead arrangement according to claim 1, characterized by that the drive unit comprises a motor and synchronous belts, the motor serving to drive synchronous belts arranged in different directions in order to generate a relative movement between the printhead assembly and the work platform. [14] Prototype production facility, characterized by that it comprises a printhead arrangement according to one of claims 1-13. [15] Prototype production system according to claim 14, characterized by that the expansion module is a laser module, cutting module, writing module, milling module or engraving module. [16] Prototype production system according to claim 14, characterized by , that the expansion module is a laser module, wherein the drive unit serves to move the laser module in a horizontal plane in order to cut and / or engrave material. [17] Prototype production system according to claim 16, characterized by , that a rotating device is arranged on the work platform, wherein the rotating device serves to drive the rotation of a rotating body or an object with an irregular surface. [18] Prototype production system according to claim 16, characterized by, that the laser module emits a laser beam which can be directed at the material to melt, vaporize or bring the material to its flash point, whereby the molten or burning material can be blown away by a gas stream coaxial with the laser beam. [19] Prototype production system according to claim 14, characterized by , that the extension module is a cutting module, wherein the cutting module can be moved under the drive of the drive unit along a target path to cut the material to be cut. [20] Prototype production system according to claim 19, characterized by that the material to be cut is in contact with the work platform, or that the prototype creation system further includes a cutting platform which serves to place the material to be cut. [21] Prototype production system according to claim 14, characterized bythat the expansion module is a writing module, wherein a holding device for attaching writing tools is provided on the expansion module.

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