Conveyor belt for screen printing of flexible printing stock

Abstract

The utility model discloses a conveyor belt for screen printing of flexible printed materials. The two ends of a plurality of conveying round belts are sleeved with limiting ring grooves in the peripheries of two conveying shafts respectively, and the conveying round belts rotate in a tensioned state; an air blowing mechanism and a photoelectric sensing assembly are arranged at the feeding end; a lifting type material receiving plate is arranged below the conveying round belts, and a plurality of grooves capable of containing the conveying round belts are formed in the material receiving plate and correspond to the conveying round belts in number and size. A lifting type material blocking piece is arranged on the rear edge of the material receiving plate, limiting plates are arranged on the two sides of the material receiving plate respectively, and the limiting plates are connected with a left-right translation driving mechanism. The blowing mechanism ensures that the flexible printing stock enters the conveying round belt in a stable transition manner and moves along with the conveying round belt; the ascending material blocking part and the material receiving plate are matched with the conveying round belt and the limiting plate, so that the flexible printing stock is accurately positioned; and then the flexible printing stock on the material receiving plate is adsorbed by the transfer manipulator under negative pressure to be conveyed away. And the flexible printing stock can be accurately and reliably transferred and conveyed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a silk screen printing equipment especially a conveying belt for transferring flexible printing substrates in printing of flexible printing substrates. BACKGROUND

[0002] With the development of silk screen printing, the types of printing substrates are constantly expanding, and flexible printing substrates are constantly emerging. For example, circuit boards made of flexible substrates usually use high-performance materials such as polyester film, polyimide (PI), or polyamide (PA). Compared with traditional hard boards, FPC has bending and flexibility, making it suitable for electronic devices and products that require bending or complex shapes.

[0003] Due to the bending and stretching of flexible materials under the action of external forces such as gravity, there is a lack of necessary rigidity to support the pickup and placement, which makes it difficult to accurately and reliably transfer flexible printing substrates during screen printing. SUMMARY

[0004] To solve the above-mentioned drawbacks, the technical problem to be solved by the utility model is to provide a conveying belt for conveying screen printing flexible printing substrates, which can accurately and reliably transfer flexible printing substrates. To solve the above-mentioned technical problem, the utility model adopts the technical scheme of a conveying belt for screen printing flexible printing substrates, which includes a plurality of conveying circular belts, both ends of the conveying circular belts are sleeved in the limiting ring grooves of the outer periphery of two conveying shafts in a tensioned state and rotate; a blowing mechanism is arranged below the conveying shaft at the feeding end to blow air towards the flexible printing substrate; a photoelectric sensing assembly is arranged near the feeding end; a lifting type material receiving plate is arranged below the conveying circular belt, a plurality of grooves capable of accommodating the conveying circular belts are arranged on the material receiving plate corresponding to the number and size of the conveying circular belts; a lifting type material blocking piece is arranged at the trailing edge of the material receiving plate, and limiting plates are arranged on both sides of the material receiving plate, and the limiting plates are connected to left-right translation driving mechanisms.

[0005] The utility model has the beneficial effects that the photoelectric sensing assembly is started after sensing the flexible printing substrate, the blowing mechanism ensures the smooth transition of the flexible printing substrate into the conveying circular belt and moves with it; the rising material blocking piece blocks the flexible printing substrate to make it stay above the material receiving plate, the material receiving plate rises to make each conveying circular belt embedded in the groove, the material receiving plate lifts the flexible printing substrate to make it separate from the conveying circular belt, and the left-right translation driving mechanisms drive the limiting plates on both sides to move to the predetermined position in the middle, correcting the possible left-right direction position deviation of the flexible printing substrate to make it accurately positioned; then the flexible printing substrate on the material receiving plate is sent away by the negative pressure adsorption of the transfer manipulator. The flexible printing substrate can be accurately and reliably transferred.

[0006] Preferably, the receiving plate is provided with vacuum breaking zones on the contact surface of the flexible printing substrate. Avoiding the close contact between the upper surface of the receiving plate and the bottom surface of the flexible printing substrate to form negative pressure suction, resulting in the transfer robot cannot smoothly negative pressure suction flexible printing substrate for transfer. If the vacuum breaking zone is composed of convex points, or the vacuum breaking zone is composed of grid parts, or similar areas that hinder the close contact between the upper surface of the receiving plate and the bottom surface of the flexible printing substrate. Further, the four corners of the receiving plate are provided with the vacuum breaking zone.

[0007] Preferably, the blowing mechanism is provided with an electrostatic eliminator, and the gas blown by the blowing mechanism blows the positive and negative ions generated by the electrostatic eliminator to the surface of the flexible printing substrate to neutralize static electricity. Avoiding static adsorption leading to transmission, transfer is not smooth.

[0008] Preferably, the blowing mechanism includes a wind pipe arranged in parallel with the conveying shaft, and a plurality of nozzles are uniformly distributed on the wind pipe. The wind pipe can rotate around its axis to adjust the blowing direction of the nozzles.

[0009] Preferably, each conveying circular belt is provided with a tension adjusting mechanism, which includes two guide wheels through which the conveying circular belt passes, and the rotating shaft of at least one guide wheel is installed in a waist-shaped slot. The installation position of the guide wheel is adjusted along the waist-shaped slot to adjust the tension of the conveying circular belt.

[0010] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above at the same time.

[0011] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art of the technology to which the present application belongs. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0012] It should be understood that the orientation or positional relationship indicated by terms such as "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0013] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0014] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only indicates that the horizontal height of the first feature is less than that of the second feature.

[0016] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a perspective structure of a conveying belt;

[0018] Figure 2 is a schematic view of an exploded structure of a conveying belt;

[0019] Figure 3 is a schematic view of a side structure of a conveying belt (including a partial enlarged view);

[0020] Figure 4 is a schematic view of a front structure of a conveying belt.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 601 - frame, 602 - deviation correction air cylinder, 603 - limiting plate, 604 - motor mounting plate, 605 - driving motor, 606 - belt drive assembly, 607 - first conveying shaft, 608 - conveying round belt, 609 - guide metal part, 610 - material receiving plate, 611 - lifting mounting plate, 612 - lifting air cylinder, 613 - material blocking mounting plate, 614 - material blocking air cylinder, 615 - material blocking part, 616 - second conveying shaft, 617 - tensioning wheel, 618 - waist-shaped groove, 619 - air pipe, 620 - nozzle, 621 - air joint, 622 - photoelectric sensing assembly, 623 - vacuum breaking area, 624 - groove, 625 - discharging roller, 626 - flexible printing substrate. DETAILED DESCRIPTION

[0023] Reference Figure 3 In an example application scenario, the flexible printing substrate 626 is printed and then sent out from the discharging roller 625 of the drying furnace to the conveying belt for conveying (natural cooling), and then the flexible printing substrate 626 on the conveying belt is adsorbed by the material transferring manipulator and transferred to other working positions. However, the existing conveying belt is difficult to smoothly complete the above working process, and the material characteristics of the flexible printing substrate comprehensively consider the factors such as electrostatic adsorption, negative pressure adsorption, gravity, friction force and the like, which can easily lead to conveying failure, so that the failure rate of this link is relatively high, which constitutes a bottleneck process of the entire automatic screen printing equipment.

[0024] Therefore, we design a conveying belt for screen printing flexible printing substrate, see the attached Figures 1-4The utility model discloses a kind of flexible printing material conveying system, it is the system that a plurality of conveying belts are arranged side by side, to complete the conveying of multiple flexible printing materials simultaneously.

[0025] In the example, each conveying belt includes six conveying round belts 608, both ends of the conveying round belts 608 are sleeved in the limiting ring groove of the outer periphery of the first conveying shaft 607 and the second conveying shaft 616 in a tensioned state, the first conveying shaft 607 is a driven shaft, and the second conveying shaft 616 is a driving shaft. The driving shaft is connected to the driving motor 605 through the belt transmission assembly 606. The driving motor 605 is connected to the rack 601 through the motor mounting plate 604. In the example, in order to facilitate the adjustment of the tension of each conveying round belt 608, a tension adjustment mechanism is arranged on each conveying round belt 608. The mechanism includes two guide wheels 617 around which the conveying round belt 608 passes. The rotating shaft of the guide wheel 617 is installed in the waist-shaped groove 618. By adjusting the installation position of the guide wheel 617 along the waist-shaped groove 618, the tension of the conveying round belt 608 can be adjusted to avoid the blocking deformation of the flexible printing material.

[0026] A blowing mechanism for blowing air towards the flexible printing material 626 is arranged below the first conveying shaft 607 at the feeding end.

[0027] In the example, the blowing mechanism includes an air pipe 619 arranged in parallel with the first conveying shaft 607. The air pipe 619 is connected to a pressure air source through an air joint 621. A plurality of nozzles 620 are uniformly distributed on the air pipe 619 to linearly and uniformly provide lifting air flow, thereby avoiding the suspension of the flexible printing material 626 with insufficient stiffness from being unable to transition onto the conveying round belt 608 or causing other disturbances. The air pipe 619 can rotate around its axis to adjust the blowing direction of the nozzles 620.

[0028] In the example, the blowing mechanism is provided with an electrostatic eliminator (not shown in the figure). The electrostatic eliminator is a commercially available device that can be purchased under the trade name "electrostatic eliminator". The principle is as follows: it is composed of a high-voltage power generator and a discharge electrode (usually made into an ion needle). Air is ionized into a large number of positive and negative ions through the high-voltage corona discharge of the sharp end, and then the air is blown to the surface of the object to neutralize static electricity, or the electrostatic eliminator is placed close to the surface of the object to neutralize static electricity. In the example, the electrostatic eliminator can be installed on the air pipe connected to the pressure air source through the air joint 621. The gas blown by the blowing mechanism evenly blows the positive and negative ions generated by the electrostatic eliminator to the surface of the flexible printing material to neutralize static electricity, thereby avoiding the adsorption of static electricity that causes the conveying and transferring to be not smooth.

[0029] A photoelectric sensing assembly 622 is arranged close to the feeding end to send a signal when the flexible printing material 626 passes through.

[0030] The lower side of the conveying round belt 608 is provided with a lifting type receiving plate 610, which is driven to lift by a lifting cylinder 612 in the example, and the lifting cylinder 612 is connected to the frame 601 through a lifting mounting plate 611.

[0031] The receiving plate 610 is provided with six grooves 624 capable of accommodating the conveying round belt 608 corresponding to the number and size of the conveying round belt. The trailing edge of the receiving plate 610 is provided with a lifting type material blocking member 615, which is driven to lift by a material blocking cylinder 614 in the example, and the material blocking cylinder 614 is connected to the frame 601 through a material blocking mounting plate 613.

[0032] The two sides of the receiving plate 610 are respectively provided with limiting plates 603, and the two limiting plates 603 are respectively connected to correction cylinders 602. During the process of lifting the flexible printing substrate by the receiving plate 610, the limiting plates 603 on both sides are translated to the middle to a predetermined position, correcting the possible left-right position deviation of the flexible printing substrate, so that it is accurately positioned, and the flexible printing substrate is stretched by the conveying round belt 608 moving below to avoid possible disorder. Until the flexible printing substrate completely separates from the conveying round belt.

[0033] A transfer manipulator (not shown in the figure) corresponding to the receiving plate 610 is provided for negative pressure adsorption of the flexible printing substrate. In the example, the contact surface of the receiving plate 610 carrying the flexible printing substrate is provided with a vacuum breaking area 623. Avoiding the upper surface of the receiving plate 610 closely adhering to the bottom surface of the flexible printing substrate to form negative pressure suction, which causes the transfer manipulator to fail to smoothly negative pressure adsorb the flexible printing substrate for transfer. In the example, the vacuum breaking area is composed of a plurality of convex points, and the vacuum breaking area can also be composed of a grid part, or a similar area that prevents the upper surface of the receiving plate from closely adhering to the bottom surface of the flexible printing substrate. In the example, the four corners of the receiving plate 610 are provided with the vacuum breaking area 623.

[0034] In the example, the conveying round belt between the first conveying shaft 607 of the receiving end and the receiving plate 610 is provided with a guide metal part 609 on both sides. Guiding the flexible printing substrate to accurately enter the upper side of the receiving plate 610.

[0035] The device workflow is as follows: firstly, the flexible printing substrate 626 is sensed by the photoelectric sensing assembly 622 after being taken out from the drying furnace, the motor 605 is driven to work to drive the conveying round belt 608 to work, and the air blowing mechanism works to smoothly transition the flexible printing substrate to the conveying round belt 608; under the synergistic action of the guide metal part 609 and the material blocking part 615, the conveying round belt 608 conveys the flexible printing substrate to and stops above the receiving plate 610; the receiving plate is raised to lift the flexible printing substrate, the limiting plate 603 corrects and positions the flexible printing substrate, until the conveying round belt 608 is completely embedded in the groove 624, the flexible printing substrate is separated from the conveying round belt 608, the transfer robot is positioned to adsorb and transfer the flexible printing substrate to the receiving working position, and the transfer and conveying of the flexible printing substrate are accurately and reliably completed.

[0036] The above disclosed embodiments of the utility model are only used to help explain the utility model. The embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and combines the drawings to specifically describe these embodiments, in order to better explain the principle and practical application of the utility model, so that the technical personnel in the technical field can well understand and utilize the utility model. However, the utility model can be implemented in many other ways different from the description, and the technical personnel in the field can make similar improvements without violating the connotation of the utility model, so the utility model is limited by the claims and the whole scope and equivalents, and is not limited by the disclosed specific embodiments.

Claims

1. A conveyor belt for web printing a flexible printing substrate, comprising a number of conveyor endless belts, characterized in that, Two ends of the conveying round belt are sleeved in the limiting ring grooves on the outer periphery of the two conveying shafts in a tension state to make rotary motion; a blowing mechanism for blowing air towards the flexible printing substrate is arranged below the conveying shaft at the feeding end; a photoelectric sensing assembly is arranged close to the feeding end; a lifting type material receiving plate is arranged below the conveying round belt, a plurality of recesses capable of accommodating the conveying round belt are arranged on the material receiving plate corresponding to the number and size of the conveying round belt; a lifting type material blocking piece is arranged at the trailing edge of the material receiving plate, and limiting plates are arranged on both sides of the material receiving plate, and the limiting plates are connected with left-right translation driving mechanisms.

2. A conveyor belt for web printing a flexible printing substrate as defined in claim 1, characterized in that A vacuum breaking zone is arranged on the contact surface of the material receiving plate bearing the flexible printing substrate.

3. A conveyor belt for web printing a flexible printing substrate as defined in claim 2, wherein, The vacuum breaking zone is composed of a plurality of convex points or grid parts.

4. A conveyor belt for web printing a flexible printing substrate as defined in claim 2, wherein, The vacuum breaking zone is arranged at the four corners of the material receiving plate.

5. A conveyor belt for web printing a flexible printing substrate according to any one of claims 1-4, characterized in that, The blowing mechanism is provided with an electrostatic eliminator.

6. A conveyor belt for web printing a flexible printing substrate as defined in claim 5, wherein, The blowing mechanism comprises an air pipe arranged in parallel with the conveying shaft, a plurality of nozzles are uniformly distributed on the air pipe, and the air pipe can rotate around its axis to adjust the blowing direction of the nozzles.

7. A conveyor belt for web printing a flexible support according to any one of claims 1, 2, 3, 4, 6, characterized in that, Each conveying round belt is provided with a tension adjusting mechanism, which comprises two guide wheels through which the conveying round belt passes, and the rotating shaft of at least one guide wheel is installed in a waist-shaped groove, and the installation position of the guide wheel is adjusted along the waist-shaped groove to adjust the tension of the conveying round belt.

8. A conveyor belt for web printing a flexible printing substrate as defined in claim 5, wherein, Each conveying round belt is provided with a tension adjusting mechanism, which comprises two guide wheels through which the conveying round belt passes, and the rotating shaft of at least one guide wheel is installed in a waist-shaped groove, and the installation position of the guide wheel is adjusted along the waist-shaped groove to adjust the tension of the conveying round belt.

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