A sealed silk screen printing plate and a silk screen printing method

Abstract

The application provides a sealed silk screen printing plate and a silk screen printing method. The sealed silk screen printing plate comprises a frame, a screen and a pattern layer arranged on the back side of the frame, a rubber blanket arranged in the middle of the front side of the frame, polyurethane adhesive strips arranged on both sides of the middle of the front side of the frame, an ink inlet arranged on one side of the front side of the frame, an ink outlet arranged on the other side of the front side of the frame, and two pressing rollers arranged on both sides of the middle of the front side of the frame. The application provides a sealed silk screen printing plate, ink is added into the cavity inside the frame, and the pressing roller and the extruding roller driven by the air cylinder are used to replace the traditional screen scraper and ink returning knife. Compared with the traditional silk screen printing, the repeated silk screen printing can be realized, the efficiency is improved, the ink is sealed, the environment is protected, the health is ensured, the speed is improved, the pattern part is not in contact with the scraper, the abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of printing, and more particularly to a sealed screen printing stencil and a screen printing processing method. Background Technology

[0002] Screen printing, a widely used printing method, can be categorized according to the substrate: fabric printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery ticket screen printing, electrical decoration advertising board screen printing, metal advertising board screen printing, stainless steel product screen printing, light reflector screen printing, screen transfer of electroplated aluminum, screen printing prints, and lacquerware screen printing, etc. It is a type of stencil printing technology, using particularly thick ink, making it ideal for creating special effects. It is especially suitable for small quantities where ink density is required. It can also be applied to three-dimensional surfaces, such as square boxes, cartons, round bottles, and cans. Besides paper, it can also print on fabrics, plastic materials, plywood, films, metal sheets, and glass. Common new products include banners, pennants, T-shirts, corrugated boxes, soft drink bottles, and circuit boards. The flexibility of screen printing is unmatched by other printing methods.

[0003] Screen printing, also known as stencil printing, is a major printing method in stencil printing.

[0004] Currently, in the screen printing process, the ink is exposed to the air and is pressed onto the workpiece by a squeegee. The ink solvent is prone to evaporation, resulting in poor printing stability, unpleasant odor, and environmental unfriendliness, which is very harmful to the human body. The direct friction between the squeegee and the screen causes severe wear and reduces the number of screen printing cycles.

[0005] Therefore, it is necessary to provide a sealed screen printing stencil and screen printing processing method to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a sealed screen printing stencil and screen printing processing method, which solves the problems in the current screen printing process, where ink is exposed to the air, the ink is squeezed onto the workpiece by a squeegee, the ink solvent is easy to evaporate, the printing stability is poor, and the ink has an unpleasant odor, is not environmentally friendly, and is very harmful to the human body. The direct friction between the squeegee and the screen causes serious wear and reduces the number of screen printing cycles.

[0007] To solve the above-mentioned technical problems, the present invention provides a sealed screen printing stencil, comprising: a frame;

[0008] A screen and pattern layer are provided on the rear side of the frame. A rubber sheet is provided in the middle of the front side of the frame, and polyurethane strips are provided on both sides of the middle of the front side of the frame.

[0009] An ink inlet is provided on one side of the front of the frame, and an ink outlet is provided on the other side of the front of the frame.

[0010] The two pressing rollers are respectively arranged on both sides of the center of the front of the frame;

[0011] An extrusion roller is disposed in the middle of the front side of the frame.

[0012] Preferably, the rubber blanket is attached to the upper layer of the frame, and the screen and pattern layer are attached to the lower layer of the frame, forming a cavity structure in the middle. The frame is made of aluminum alloy, and a channel is provided in the middle of the frame.

[0013] Preferably, the polyurethane adhesive strip is adhered to the middle of the frame and on both sides of the screen and pattern layer.

[0014] Preferably, a connecting device is fixedly installed at the middle of the top and bottom of the outer surface of the frame, and a clamping device is provided inside the connecting device.

[0015] Preferably, the connecting device includes a connecting plate, a movable groove, a slide rod, a spring, and a pull block. The connecting plate is fixedly installed on the surface of the frame, the movable groove is opened in the middle of the surface of the connecting plate, the slide rod is slidably installed inside the movable groove, a pull block is fixedly installed at one end of the slide rod, and a spring is sleeved on the outer surface of the slide rod.

[0016] Preferably, the clamping device includes a bonding plate, a pressing pad, and a moving block. The moving block is fixedly connected to one end of the slide rod, the bonding plate is fixedly installed on one side of the moving block, and the pressing pad is fixedly installed on the surface of the bonding plate.

[0017] Preferably, the compression pad is made of rubber.

[0018] Preferably, a pushing device is fixedly installed on the surface of the connecting plate. The pushing device includes a hydraulic cylinder, a connecting rod, and a pull rod. The hydraulic cylinder is fixedly connected to one side of the connecting plate, the connecting rod is fixedly connected to the output shaft of the hydraulic cylinder, and the pull rod is fixedly connected to one end of the connecting rod.

[0019] Preferably, the other end of the pull rod is connected to the moving block.

[0020] A sealed screen printing stencil and screen printing processing method, comprising the following steps: S1: adding ink into the cavity of the frame through the ink inlet, using a cylinder-driven roller of the screen printing machine instead of the traditional screen squeegee and ink return blade;

[0021] S2: The downward pressure of the pressing roller causes the rubber blanket and the screen and pattern layer to bend downwards simultaneously. The pressure of the pressing roller causes the rubber blanket and the screen and pattern layer to stick together. The ink pressure in the frame increases and flows to the workpiece through the mesh. The pressing roller and the squeezing roller move upwards and lift up, separating the ink from the rubber blanket and the screen and pattern layer.

[0022] Compared with related technologies, the sealed screen printing stencil and screen printing method provided by the present invention have the following beneficial effects:

[0023] This invention provides a sealed screen printing stencil and screen printing processing method. By adding ink into the cavity inside the frame, and using cylinder-driven pressing rollers and squeezing rollers to replace the traditional screen squeegee and ink return blade, it can perform repeated screen printing compared to traditional screen printing, improving efficiency. The ink is sealed, making it environmentally friendly, healthy, and fast. The pattern area does not come into contact with the squeegee, reducing wear and extending service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a first embodiment of a sealed screen printing stencil provided by the present invention;

[0025] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the top of the frame.

[0026] Figure 3 for Figure 1 The diagram shows a side sectional view of the frame.

[0027] Figure 4 This is a schematic diagram of the structure of a second embodiment of a sealed screen printing stencil provided by the present invention;

[0028] Figure 5 for Figure 4 The diagram shows the structure of the connecting device.

[0029] Figure 6 This is a structural schematic diagram of a third embodiment of a sealed screen printing stencil provided by the present invention;

[0030] Figure 7 for Figure 6 The diagram shows the structure of the propulsion device.

[0031] Figure 8 This is a structural schematic diagram of a fourth embodiment of a sealed screen printing plate provided by the present invention.

[0032] The diagram is labeled as follows: 1. Frame, 2. Rubber cloth, 3. Polyurethane strip, 4. Ink inlet, 5. Ink outlet, 6. Pressing roller, 7. Extrusion roller, 8. Screen and pattern layer, 9. Clamping device, 91. Adhesive plate, 92. Extrusion pad, 93. Moving block, 10. Connecting device, 101. Connecting plate, 102. Moving groove, 103. Slide rod, 104. Spring, 105. Pull block, 11. Pushing device, 111. Hydraulic cylinder, 112. Connecting rod, 113. Pull rod. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the structure of a first embodiment of a sealed screen printing stencil and screen printing processing method provided by the present invention; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the top of the frame. Figure 3 for Figure 1 The diagram shows a side sectional view of the frame. A sealed screen printing stencil includes: a frame 1;

[0035] The screen and pattern layer 8 is disposed on the rear side of the frame 1. The rubber sheet 2 is disposed in the middle of the front side of the frame 1, and polyurethane strips 3 are disposed on both sides of the middle of the front side of the frame 1.

[0036] Ink inlet 4 is provided on one side of the front of the frame 1, and ink outlet 5 is provided on the other side of the front of the frame 1.

[0037] Pressing rollers 6, the two pressing rollers 6 are respectively arranged on both sides of the center of the front of the frame 1;

[0038] The extrusion roller 7 is located in the middle of the front side of the frame 1.

[0039] The rubber sheet 2 is attached to the upper layer of the frame 1, and the screen and pattern layer 8 is attached to the lower layer of the frame 1, forming a cavity structure in the middle. The frame 1 is made of aluminum alloy and has a channel in the middle.

[0040] The polyurethane adhesive strip 3 is adhered to the middle of the frame 1 and on both sides of the screen and pattern layer 8.

[0041] A screen printing process using a sealed screen printing stencil includes the following steps: S1: Ink is added to the cavity of the frame 1 through the ink inlet 4, and a cylinder-driven roller of the screen printing machine is used instead of the traditional screen squeegee and ink return blade.

[0042] S2: The downward pressure of the pressing roller 6 causes the rubber sheet 2 and the screen and pattern layer 8 to bend downwards simultaneously. The pressure of the pressing roller 6 causes the rubber sheet 2 and the screen and pattern layer 8 to stick together. The ink pressure in the frame 1 increases and flows to the workpiece through the mesh. The pressing roller 6 and the squeezing roller 7 move upwards and lift up, separating the ink from the rubber sheet 2 and the screen and pattern layer 8.

[0043] The blanket 2 is a sealed structure that is not breathable or ink-permeable.

[0044] The screen and pattern layer 8 is a structure where the patterned parts are cut out and the rest are sealed.

[0045] The length of the pressure roller 6 is greater than or equal to the width between the two polyurethane strips 3.

[0046] The pressing roller 6 and the squeezing roller 7 are driven by a cylinder or motor to move up and down synchronously.

[0047] The extrusion roller 7 is positioned in the middle of the pressing roller 6.

[0048] The length of the extrusion roller 7 is less than the width between the two polyurethane strips 3.

[0049] The pressing roller 6 and the squeezing roller 7 are driven by a cylinder or motor to press down and lift up in the following sequence: when pressing down, the pressing roller 6 must press down before the squeezing roller 7 can press down; when lifting up, the squeezing roller 7 must lift up before the pressing roller 6 can lift up.

[0050] Frame 1 can be an aluminum alloy square frame or a stainless steel square frame.

[0051] The screen and pattern layer 8 can be made of stainless steel, polyester, or nylon with interwoven yarn fibers, woven mesh, coated with photosensitive emulsion for exposure and development to create patterns, or it can be a composite structure of stainless steel sheet + polyester or stainless steel sheet + nylon, with patterns created by laser cutting.

[0052] The rubber sheet 2 and the wire mesh layer are stretched and tightened longitudinally and transversely by a wire mesh stretching machine and fixed to the frame 1 by adhesive.

[0053] The rubber blanket 2 can be made of plastic film, stainless steel + polyester, or rubber blanket.

[0054] The polyurethane adhesive strip 3 can be made of polyurethane rubber, silicone, rubber, or other materials, and is adhered to the screen using an adhesive.

[0055] The rollers can be cylindrical or irregularly shaped, and the material can be rubber rollers or stainless steel rollers.

[0056] In the fourth embodiment, two pressing rollers 6 are respectively disposed on top of the two polyurethane adhesive strips 3, and a squeezing roller 7 is disposed on top of the rubber blanket 2, wherein the length of the squeezing roller 7 is less than the length between the two polyurethane adhesive strips 3.

[0057] Compared with related technologies, the sealed screen printing stencil provided by the present invention has the following beneficial effects:

[0058] This invention provides a sealed screen printing stencil and screen printing processing method. By adding ink into the cavity inside the frame 1, the traditional screen squeegee and ink return knife are replaced by a cylinder-driven pressing roller 6 and a squeezing roller 7. Compared with traditional screen printing, repeated screen printing is possible, which improves efficiency. The ink is sealed, which is environmentally friendly, healthy and fast. The pattern part does not come into contact with the squeegee, which reduces wear and extends service life.

[0059] Second Embodiment

[0060] Please refer to the following: Figure 4 and Figure 5 Based on the first embodiment of this application which provides a sealed screen printing stencil and screen printing method, the second embodiment of this application proposes another sealed screen printing stencil and screen printing method. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0061] Specifically, the second embodiment of this application provides a sealed screen printing stencil and screen printing processing method, which differs in that, in a sealed screen printing stencil and screen printing processing method, a connecting device 10 is fixedly installed in the middle of the top and bottom of the outer surface of the frame 1, and a clamping device 9 is provided inside the connecting device 10.

[0062] The connecting device 10 includes a connecting plate 101, a moving groove 102, a sliding rod 103, a spring 104, and a pull block 105. The connecting plate 101 is fixedly installed on the surface of the frame 1. The moving groove 102 is opened in the middle of the surface of the connecting plate 101. The sliding rod 103 is slidably installed inside the moving groove 102. A pull block 105 is fixedly installed at one end of the sliding rod 103. The spring 104 is sleeved on the outer surface of the sliding rod 103.

[0063] The clamping device 9 includes a bonding plate 91, a pressing pad 92, and a moving block 93. The moving block 93 is fixedly connected to one end of the slide rod 103, the bonding plate 91 is fixedly installed on one side of the moving block 93, and the pressing pad 92 is fixedly installed on the surface of the bonding plate 91.

[0064] The compression pad 92 is made of rubber.

[0065] A pushing device 11 is fixedly installed on the surface of the connecting plate 101. The pushing device 11 includes a hydraulic cylinder 111, a connecting rod 112, and a pull rod 113. The hydraulic cylinder 111 is fixedly connected to one side of the connecting plate 101, the connecting rod 112 is fixedly connected to the output shaft of the hydraulic cylinder 111, and the pull rod 113 is fixedly connected to one end of the connecting rod 112.

[0066] The other end of the pull rod 113 is connected to the moving block 93.

[0067] The slide bar 103 extends from the moving block 93 to the outer surface of the connecting plate 101.

[0068] The restoring force of spring 104 pushes the moving block 93 to move closer to frame 1.

[0069] The working principle of the sealed screen printing stencil and screen printing method provided by this invention is as follows:

[0070] When working, the user first holds the pull block 105 and pulls the slide bar 103 to move away from the frame 1. The slide bar 103 drives the moving block 93 to move, and the moving block 93 drives the bonding plate 91 and the pressing pad 92 to move. The bonding plate 91 is separated from the frame 1, so that the screen and pattern layer 8 can be separated from the frame 1 without restriction.

[0071] The new screen and pattern layer 8 is attached to the bottom of the frame 1, and the two sides of the screen and pattern layer 8 are attached to the surface of the frame 1 respectively. Then, the pull block 105 is released, and the restoring force of the spring 104 pushes the moving block 93. The moving block 93 and the bonding plate 91 move towards the frame 1. The bonding plate 91 drives the pressing pad 92 to restrict the screen and pattern layer 8 to the surface of the frame 1.

[0072] Compared with related technologies, the sealed screen printing stencil and screen printing method provided by the present invention have the following beneficial effects:

[0073] This invention provides a sealed screen printing stencil and a screen printing processing method. By moving the sliding rod 103, the clamping device 9 is driven away from the frame 1, making it convenient for the operator to install or remove the screen and pattern layer 8 from the bottom of the frame 1. Then, the restoring force of the spring 104 pushes the moving block 93, so that the bonding plate 91 is attached to the surface of the frame 1, and the screen and pattern layer 8 are installed at the bottom of the frame 1. This device has a simple structure, strong practicality, and can quickly replace and install the screen and pattern layer 8. The installation and disassembly methods are convenient and simple, improving the practicality of this device.

[0074] Third Embodiment

[0075] Please refer to the following: Figure 6 and Figure 7Based on the first embodiment of this application, which provides a sealed screen printing stencil, the third embodiment of this application proposes another sealed screen printing stencil. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0076] Specifically, the third embodiment of this application provides a sealed screen printing stencil that differs in that, in a sealed screen printing stencil, a pushing device 11 is fixedly installed on the surface of the connecting plate 101. The pushing device 11 includes a hydraulic cylinder 111, a connecting rod 112, and a pull rod 113. The hydraulic cylinder 111 is fixedly connected to one side of the connecting plate 101, the connecting rod 112 is fixedly connected to the output shaft of the hydraulic cylinder 111, and the pull rod 113 is fixedly connected to one end of the connecting rod 112.

[0077] The other end of the pull rod 113 is connected to the moving block 93.

[0078] The working principle of the sealed screen printing stencil and screen printing method provided by this invention is as follows:

[0079] During operation, the output shaft of the hydraulic cylinder 111 is first moved by the external power supply, which drives the clamping device 9 to move away from the frame 1. The output shaft of the hydraulic cylinder 111 moves towards the frame 1, which in turn drives the clamping device 9 to move towards the frame 1.

[0080] Compared with related technologies, the sealed screen printing stencil and screen printing method provided by the present invention have the following beneficial effects:

[0081] This invention provides a sealed screen printing stencil and a screen printing processing method. The output shaft of the hydraulic cylinder 111 is moved by an external power source, which drives the clamping device 9 to move away from the frame 1. The output shaft of the hydraulic cylinder 111 moves towards the frame 1, which in turn drives the clamping device 9 to move towards the frame 1. This device has a simple structure, strong practicality, and can automatically control the movement of the clamping device 9, reducing the labor intensity of operators and improving the practicality of the device.

[0082] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sealed screen printing screen, characterized in that include: frame; The screen and pattern layer are attached to the lower layer of the frame, and a rubber sheet is attached to the upper layer of the frame, forming a cavity structure in the middle. The frame is made of aluminum alloy and has a channel in the middle. Polyurethane strips are provided on both sides of the middle of the front of the frame. A connecting device is fixedly installed in the middle of the top and bottom of the outer surface of the frame. A clamping device is provided inside the connecting device. The rubber sheet is a sealed structure that is airtight and ink-proof. An ink inlet is provided on one side of the front of the frame, and an ink outlet is provided on the other side of the front of the frame. The pressing rollers consist of two rollers, each positioned above one of the two polyurethane strips. The length of each pressing roller is greater than or equal to the width between the two polyurethane strips. A squeeze roller is disposed above the rubber sheet and between the two pressing rollers.

2. The sealed screen printing stencil according to claim 1, characterized in that, The connecting device includes a connecting plate, a moving groove, a sliding rod, a spring, and a pull block. The connecting plate is fixedly installed on the surface of the frame. The moving groove is opened in the middle of the surface of the connecting plate. The sliding rod is slidably installed inside the moving groove. A pull block is fixedly installed at one end of the sliding rod. A spring is sleeved on the outer surface of the sliding rod.

3. A sealed screen printing stencil according to claim 2, characterized in that, The clamping device includes a bonding plate, a pressing pad, and a moving block. The moving block is fixedly connected to one end of the slide rod, the bonding plate is fixedly installed on one side of the moving block, and the pressing pad is fixedly installed on the surface of the bonding plate.

4. A sealed screen printing stencil according to claim 3, characterized in that, The compression pad is made of rubber.

5. A sealed screen printing stencil according to claim 3, characterized in that, A pushing device is fixedly installed on the surface of the connecting plate. The pushing device includes a hydraulic cylinder, a connecting rod, and a pull rod. The hydraulic cylinder is fixedly connected to one side of the connecting plate, the connecting rod is fixedly connected to the output shaft of the hydraulic cylinder, and the pull rod is fixedly connected to one end of the connecting rod.

6. A sealed screen printing stencil according to claim 5, characterized in that, The other end of the pull rod is connected to the moving block.

7. A method for screen printing a sealed screen printing stencil, comprising the sealed screen printing stencil as described in claim 1, characterized in that, Includes the following steps: S1: Ink is added to the cavity of the frame through the ink inlet, using the cylinder-driven pressing roller and extrusion roller of the screen printing machine instead of the traditional screen squeegee and ink return blade; S2: The downward pressure of the pressing roller causes the rubber sheet and the screen and pattern layer to bend downwards simultaneously. The pressure of the pressing roller causes the rubber sheet and the screen and pattern layer to adhere to each other. The ink pressure in the frame increases and flows to the workpiece through the mesh. The pressing roller and the squeezing roller move upwards and lift up, separating the rubber sheet and the screen and pattern layer.

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