Device for adjusting tension balance of silk-screen printing plate

Abstract

The utility model discloses a silk-screen printing plate tension balance adjusting device which comprises two pressing plates symmetrically arranged on the two sides of a screen frame, the two pressing plates are connected with a first screw rod and a second screw rod which are symmetrically arranged respectively, threads of the first screw rod and threads of the second screw rod are opposite, the first screw rod and the second screw rod are in threaded connection with threaded sleeves, and the first screw rod and the second screw rod are in threaded connection with the threaded sleeves. The first threaded rod and the second threaded rod are connected with the threaded sleeve in a threaded mode, a first thread and a second thread are formed at the two ends of the inner wall of the threaded sleeve, the first thread is meshed with the first threaded rod, and the second thread is meshed with the second threaded rod. The first screw rod and the second screw rod move towards the inner side at the same time, the long edges of the two sides of the screen frame are extruded, the screen frame slightly deforms and is evenly stressed, then the screen cloth is fixedly installed, the tension balancing device is detached, the screen frame rebounds, and tension is applied to the two ends of the screen cloth.

Description

Technical Field

[0001] The utility model relates to the technical field of silk screen printing, in particular to a device for adjusting the tension balance of silk screen printing plate making. Background Art

[0002] In the process of making and using large-size screen printing plates (screen frame length exceeds 2000mm and width exceeds 1000mm), because the polyurethane mesh has a tightening force during the stretching process, the screen frame has tension, so that the stretching screen remains balanced. Figure 1 As shown, with the reciprocating motion of the scraper 7, the mesh 8 will relax and the tension will decrease, resulting in unsatisfactory printing effect. At the same time, the screen frame will be irreversibly deformed, resulting in uneven tension of the mesh, further affecting the printing quality of the product, resulting in defects such as burnt lines and sawtooth on the substrate 9;

[0003] The existing tension adjustment mechanism, such as the bidirectional adjustment mechanism and the bidirectionally adjustable screen printing plate device provided in patent CN201922274273.6, stretches or compresses the printing plate frame by adjusting the components, and the adjustment mechanism is bidirectionally adjustable, the adjustments on both sides are not synchronized, and the control is uneven, resulting in uneven tension distribution on the mesh. Therefore, a device for adjusting the tension balance of the screen printing plate is designed to make the mesh evenly stressed. Utility Model Content

[0004] The utility model aims to provide a device for adjusting the tension balancing of screen printing plate making. Before the mesh is fixed, the first screw and the second screw are moved inward at the same time by rotating the threaded sleeve, and the long sides of the two sides of the mesh frame are squeezed to make the mesh frame slightly deformed and evenly stressed. Then the mesh is fixed and installed, and the tension balancing device is disassembled. The mesh frame will rebound, and tension is applied to both ends of the mesh to keep the tension stable and even.

[0005] The utility model provides the following technical solution: a device for adjusting the tension balance of silk-screen platemaking, comprising two pressing plates symmetrically arranged on both sides of a screen frame, the two pressing plates are respectively connected with a first screw and a second screw symmetrically arranged, the threads of the first screw and the second screw are opposite, the first screw and the second screw are threadedly connected with a threaded sleeve, the first thread and the second thread are formed on both ends of the inner wall of the threaded sleeve, the first thread is meshed with the first screw, and the second thread is meshed with the second screw.

[0006] In order to reduce damage to the screen frame, an elastic pressing block is fixed on the pressing plate, and the elastic pressing block is used to fit on the side of the screen frame.

[0007] In order to increase the contact area between the elastic pressing block and the screen frame after deformation, the contact surface between the elastic pressing block and the pressing block is a horizontal surface, and the contact surface between the elastic pressing block and the side of the screen frame is an arc surface.

[0008] In order to stabilize the deformation and stress of the screen frame, the pressing plate is a right-angle profile, one side of which is tightly attached to the lower surface of the screen frame and the other side is located outside the screen frame, and the pressing plate is wrapped around the screen frame.

[0009] In order to facilitate the rotation of the threaded sleeve, the cross section of the threaded sleeve is polygonal.

[0010] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0011] (1) Before the mesh is fixed, the first screw and the second screw are simultaneously moved inward by rotating the threaded sleeve to squeeze the long sides of the mesh frame, causing the mesh frame to deform slightly. The mesh is then fixed and installed, and the tension balancing device is removed. The mesh frame will rebound, applying tension to both ends of the mesh to keep the tension stable.

[0012] (2) The threaded sleeve is used to simultaneously control the movement of the first screw and the second screw, so that the force on the mesh frame is uniform, further ensuring that the force on both ends of the mesh is relatively uniform, and the deviation is within 0.5N;

[0013] (3) The mesh has sufficient tension, which increases the number of times the mesh can be printed, reduces the frequency of mesh replacement, and improves printing quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is an existing screen printing structure;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] In the figure: 1, pressing plate; 2, elastic pressing block; 3, first screw; 4, threaded sleeve; 41, first thread; 42, second thread; 5, second screw; 6, screen frame; 7, scraper; 8, screen cloth; 9, substrate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] See also Figure 2 The utility model provides a technical solution: a device for adjusting the tension balance of screen printing plate making, comprising two pressing plates 1 symmetrically arranged on both sides of a screen frame 6, the pressing plates 1 are used to squeeze the long sides of the screen frame 6, so that the screen frame 6 shrinks before the screen cloth 8 is fixed, and the long sides of the screen frame 6 shrink within the deformation range, and the device is removed after the screen cloth 8 is fixed, and the screen frame 6 is no longer shrunk, and tension is generated on the screen cloth 8 under the rebound effect of the screen frame 6, and the two pressing plates 1 are respectively connected with a first screw rod 3 and a second screw rod 5 symmetrically arranged, and the threads of the first screw rod 3 and the second screw rod 5 are opposite, and the first screw rod 3 and the second screw rod 5 are threadedly connected with a threaded sleeve 4, and the first thread 41 and the second thread 42 are formed on the inner wall of the threaded sleeve 4 at both ends. Two threads 42, the first thread 41 is meshed with the first screw 3, and the second thread 42 is meshed with the second screw 5. By rotating the threaded sleeve 4 before fixing the mesh 8, the first screw 3 and the second screw 5 are moved inward, causing the two side frames of the screen frame 6 to be simultaneously squeezed inward and contracted. Then the screen frame 6 and the mesh belt are installed and fixed, and then the tension balancing device is removed. The two sides of the screen frame 6 will rebound, and further uniform tension is applied to the two ends of the mesh belt. The structure adjusts the tension of the mesh 8 through the micro-deformation of the screen frame 6, so that the two ends of the mesh 8 are subjected to relatively uniform force, and the deviation is within 0.5N, which further increases the number of printing times of the mesh 8 and improves the printing quality and production efficiency of the product.

[0021] An elastic pressing block 2 is fixed on the pressing plate 1. The elastic pressing block 2 is used to fit on the side of the screen frame 6. The elastic pressing block 2 will deform when squeezing the screen frame 6, thereby increasing the contact area between the elastic pressing block 2 and the screen frame 6, reducing the pressure on the screen frame 6 per unit area, and reducing damage to the screen frame 6.

[0022] The contact surface between the elastic pressing block 2 and the pressing plate 1 is a horizontal plane, and the contact surface between the elastic pressing block 2 and the side of the screen frame 6 is an arc surface. By designing the contact surface between the elastic pressing block 2 and the screen frame 6 as an arc surface, the arc can be evenly fitted on the side of the screen frame 6 after deformation, so that the long side of the screen frame 6 shrinks evenly.

[0023] The pressing plate 1 is a right-angled profile, one side of which is tightly attached to the lower surface of the mesh frame 6 and the other side is located on the outside of the mesh frame 6. The pressing plate 1 is wrapped around the mesh frame 6. By designing the right-angled pressing plate 1, the lower end and side of the mesh frame 6 are limited so that the bottom surfaces at both ends of the mesh frame 6 are on the same plane.

[0024] The cross section of the threaded sleeve 4 is polygonal, and in this embodiment, is preferably hexagonal, so that the threaded sleeve 4 can be easily rotated using a tool.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for adjusting the tension balance of screen printing plate making, comprising two pressing plates symmetrically arranged on both sides of a screen frame, characterized in that: The two pressure plates are respectively connected with a first screw and a second screw which are symmetrically arranged, and the threads of the first screw and the second screw are opposite. A threaded sleeve is threadedly connected to the first screw and the second screw, and a first thread and a second thread are formed on both ends of the inner wall of the threaded sleeve. The first thread is meshed with the first screw, and the second thread is meshed with the second screw.

2. The device for adjusting the tension balance of screen printing plate making according to claim 1, characterized in that: An elastic pressing block is fixed on the pressing plate, and the elastic pressing block is used to fit on the side of the screen frame.

3. The device for adjusting the tension balance of screen printing plate making according to claim 2, characterized in that: The contact surface between the elastic pressing block and the pressing plate is a horizontal surface, and the contact surface between the elastic pressing block and the side edge of the screen frame is an arc surface.

4. The device for adjusting the tension balance of screen printing plate making according to claim 1, characterized in that: The pressing plate is a right-angled profile, one side of which is closely attached to the lower surface of the mesh frame, and the other side is located outside the mesh frame, and the pressing plate is wrapped around the mesh frame.

5. The device for adjusting tension balance of screen printing plate making according to claim 1, characterized in that: The cross section of the threaded sleeve is polygonal.

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