Automatic stretching machine
By installing straightening devices around and at four corners on the screen stretching machine, combined with a lifting platform and cylinder drive, the problem of uneven tensioning caused by the lack of force on the diagonal lines of the screen is solved, achieving uniform tensioning of the screen and improving printing quality.
Patent Information
- Application Number
- CN202423316803.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When the existing screen stretching machine pulls the screen in four directions, no corresponding pulling device is provided at the diagonal lines of the screen, resulting in the screen being unable to be evenly stretched, thus affecting the printing quality.
An automatic screen stretching machine is designed, which adopts straightening devices on all sides and at four corners. It is driven by a lifting platform and controlled by a cylinder to ensure that the screen is evenly tightened in four directions and four corners. Guide columns and conical clamps are set to improve stability and accuracy.
It achieves fast and uniform tensioning of the screen, improves the efficiency and quality of screen tensioning, ensures the stability and reliability of printing, and avoids the problems of local relaxation or over-stretching.
Smart Images
Figure CN223466853U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of silk screen printing, especially to an automatic screen stretcher. BACKGROUND
[0002] The screen stretcher is an auxiliary device for screen printing plate making, and it is used to stretch the silk screen on the screen frame with a certain tension. The screen stretching is the primary process for screen printing plate making, and the quality of the screen stretching relates to the quality of plate making and printing.
[0003] The screen stretcher in the prior art is usually arranged at the four edges of the screen cloth, and the screen cloth is pulled from the four directions to make the screen cloth tight. However, the corresponding pulling device is usually not arranged at the diagonal line of the screen cloth, so the diagonal line of the silk screen is not stressed, and the silk screen cannot be tightly stretched, which will affect the printing quality to some extent. SUMMARY
[0004] To solve the problem that the screen stretcher in the prior art is usually arranged at the four edges of the screen cloth, and the screen cloth is pulled from the four directions to make the screen cloth tight, but the corresponding pulling device is usually not arranged at the diagonal line of the screen cloth, so the diagonal line of the silk screen is not stressed, and the silk screen cannot be tightly stretched, which will affect the printing quality to some extent, the present application provides an automatic screen stretcher, and the specific scheme is as follows.
[0005] An automatic screen stretcher comprises a rack, a lifting table arranged at the middle part of the rack, the lifting table being driven by a pneumatic cylinder to move along the vertical direction, four peripheral straightening devices arranged at the four edges of the lifting table, four corner straightening devices arranged at the four corners of the lifting table, the four peripheral straightening devices and the four corner straightening devices being used for detachable connection with the silk screen, the four peripheral straightening devices being slidably connected with the rack, the four corner straightening devices also being slidably connected with the rack, four peripheral driving devices arranged on the rack and corresponding to the four peripheral straightening devices, and four corner driving devices arranged on the rack and corresponding to the four corner straightening devices.
[0006] Through the above technical scheme, the automatic screen stretcher can quickly and uniformly stretch the silk screen, improve the screen stretching efficiency and quality, and the cooperation of the four peripheral straightening devices and the four corner straightening devices ensures the balance of the tension of the silk screen in each direction, and the corresponding straightening device is arranged on the diagonal line, so that the problems of local relaxation or excessive stretching are avoided.
[0007] Optionally, the four corner straightening devices comprise a four-corner frame body, the four-corner frame body being connected with the four corner driving devices and driven by the four corner driving devices, a four-corner pneumatic cylinder being fixedly arranged on the four-corner frame body, a four-corner lower clamping plate being fixedly arranged on the four-corner pneumatic cylinder, a four-corner upper clamping plate being fixedly arranged on the piston rod of the four-corner pneumatic cylinder, and the four-corner upper clamping plate and the four-corner lower clamping plate being the same in shape and being correspondingly arranged.
[0008] By adopting the above technical scheme, the four-corner straightening device can realize accurate four-corner positioning and tensioning, and ensure that the wire mesh remains flat and wrinkle-free during the tensioning process. The connection of the four-corner frame body and the four-corner driving device ensures the stability and controllability of the four-corner straightening device, and the use of the four-corner cylinder enables the upper and lower four-corner clamps to be flexibly adjusted in position, thereby adapting to wire meshes of different sizes.
[0009] Optionally, the upper four-corner clamp and the lower four-corner clamp are both arranged in a right angle shape, and one side of the upper four-corner clamp and the lower four-corner clamp is parallel to the diagonal line of the lifting platform.
[0010] By adopting the above technical scheme, the upper four-corner clamp and the lower four-corner clamp are both arranged in a right angle shape, which ensures that the tensioning effect of the wire mesh at the four corners is more uniform, and avoids the problem of uneven tension caused by the mismatching of the clamp shape. At the same time, one side of the upper four-corner clamp and the lower four-corner clamp is parallel to the diagonal line of the lifting platform, which makes the clamping position more accurate and improves the stability and reliability of the wire mesh.
[0011] Optionally, the four-corner driving device comprises a guide rail and a driving plate, both ends of the driving plate are provided with driving gears, a driving chain is arranged between the driving gears, the driving gears can drive the driving chain to move, the four-corner frame body is slidably connected with the guide rail, and the four-corner frame body is fixedly connected with the driving chain and can move with the driving chain.
[0012] By adopting the above technical scheme, the guide rail can guide the four-corner frame body, and the driving gears can drive the driving chain, and the driving chain can drive the four-corner frame body to move, so that the four-corner frame body moves along the guide rail.
[0013] Optionally, the upper four-corner clamp is further provided with a mounting bracket, the mounting bracket is arranged perpendicularly to the upper four-corner clamp, and a supporting rod is arranged at an end of the mounting bracket away from the upper four-corner clamp, and the supporting rod is arranged perpendicularly to the mounting bracket.
[0014] By adopting the above technical scheme, the mounting bracket and the supporting rod arranged on the mounting bracket are provided, and the supporting rod can temporarily place the wire mesh and the wooden frame, which facilitates the convenience of operation when arranging the wire mesh and facilitates the placement and removal of the wooden frame.
[0015] Optionally, the upper four-corner clamp is provided with a conical clamping piece facing the lower four-corner clamp, the lower four-corner clamp is provided with a corresponding conical clamping groove, and the conical clamping piece can be embedded in the conical clamping groove.
[0016] The conical clamping piece on the four-corner upper clamping plate and the conical clamping groove on the four-corner lower clamping plate are matched, which can firmly clamp the screen, improve the stability and reliability of the tightening process, prevent the screen from loosening or displacement during the tightening process, and thus ensure the quality of the final screen.
[0017] Optionally, the four-corner straightening device comprises a four-corner cylinder, a lower fixed strip is fixedly arranged on the four-corner cylinder, an upper fixed strip is fixedly arranged on the piston rod of the four-corner cylinder, the upper fixed strip and the lower fixed strip are correspondingly arranged, the upper fixed strip and the lower fixed strip are arranged along the length direction of the corresponding side of the lifting platform, the upper fixed strip is also provided with a conical clamping piece, the lower fixed strip is provided with a corresponding conical clamping groove, and the lower fixed strip is fixedly connected with the four-corner driving device.
[0018] By adopting the above technical scheme, the relative position of the upper fixed strip and the lower fixed strip can be effectively controlled by the four-corner cylinder of the four-corner straightening device, and accurate fixing and tensioning of the screen can be realized. The upper fixed strip and the lower fixed strip are arranged along the length direction of the corresponding side of the lifting platform, which ensures uniform stretching of the screen in four directions and improves the quality and stability of the screen. Meanwhile, the conical clamping piece on the upper fixed strip is matched with the conical clamping groove on the lower fixed strip, which further enhances the fixing effect of the screen and avoids loosening or displacement.
[0019] Optionally, the four-corner driving device comprises a driving cylinder, and the lower fixed strip is fixedly connected to the piston rod of the driving cylinder.
[0020] By adopting the above technical scheme, the driving cylinder can drive the four-corner cylinder to move in the horizontal direction, thereby realizing straightening of the screen.
[0021] Optionally, the lower fixed strip is provided with a guide column towards the upper fixed strip, the guide column penetrates through the upper fixed strip, and the four-corner lower clamping plate is also provided with a guide column towards the four-corner upper clamping plate, and the guide column penetrates through the corresponding four-corner upper clamping plate.
[0022] By adopting the above technical scheme, the guide column is arranged, which can make the four-corner straightening device and the four-corner straightening device more stable when clamping the screen, avoid uneven screen caused by position deviation, and improve the precision and reliability of the screen.
[0023] In summary, the present application has at least the following beneficial effects:
[0024] The application solves the problem that the existing stretcher is usually arranged at four edges of the screen cloth, and the screen cloth is pulled from four directions to make the screen cloth tight, but the diagonal of the screen cloth is usually not provided with corresponding pulling device, so that the diagonal of the screen cloth is not stressed, and the screen cloth cannot reach a better tight state, which will affect the printing quality to a certain extent. The four directions and four corners of the screen cloth are pulled, so that each position of the screen cloth can be straightened. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a perspective view of the embodiment.
[0026] Figure 2 is a sectional view of the embodiment.
[0027] Figure 3 is a perspective view of the four-corner straightening device and the four-corner driving device in the embodiment.
[0028] Figure 4 is a perspective view of the four-edge straightening device and the four-edge driving device in the embodiment.
[0029] REFERENCE SIGNS:
[0030] 1, frame;
[0031] 2, lifting platform;
[0032] 3, four-corner straightening device; 31, four-corner cylinder; 32, lower fixed bar; 33, upper fixed bar; 34, driving cylinder; 35, guide column;
[0033] 4, four-corner straightening device; 41, four-corner frame body; 42, four-corner cylinder; 43, four-corner lower clamping plate; 431, conical clamping groove; 44, four-corner upper clamping plate; 441, mounting frame; 442, support rod; 443, conical clamping piece;
[0034] 5, four-corner driving device; 51, four-corner cylinder;
[0035] 6, four-corner driving device; 61, guide rail; 62, driving plate; 621, driving gear; 622, driving chain. DETAILED DESCRIPTION
[0036] The application will be further described in detail through specific embodiments in combination with the drawings.
[0037] An automatic screen stretcher, such as Figure 1 and Figure 2As shown, including the rack, the middle of the rack is provided with a lifting platform, the lifting platform is driven by the cylinder along the vertical direction, the four edges of the lifting platform are provided with four peripheral straightening devices, the four corners of the lifting platform are provided with four corner straightening devices, the four edge straightening devices and the four corner straightening devices are used for detachable connection with the screen, the four peripheral straightening devices are slidingly connected with the rack, the four corner straightening devices are also slidingly connected with the rack, and the rack is provided with corresponding four peripheral driving devices for driving the four peripheral straightening devices and four corner driving devices for driving the four corner straightening devices. In specific implementation, the rack is arranged around the lifting platform, and the rack is directly installed on the ground. When producing, the wooden frame is first placed on the lifting platform, then the screen is arranged on the wooden frame, and then the screen is adhered to the wooden frame by glue, and the excess screen is cut off to complete the production.
[0038] As shown in Figure 3 The four corner straightening devices include a four corner frame body, the four corner frame body is connected with the four corner driving device and driven by the four corner driving device, the four corner frame body is fixedly provided with a four corner cylinder, the four corner cylinder is fixedly provided with a four corner lower clamping plate, the piston rod of the four corner cylinder is fixedly provided with a four corner upper clamping plate, and the four corner upper clamping plate and the four corner lower clamping plate are the same shape and are correspondingly arranged. In specific implementation, the four corner frame body is arranged at the four corners of the rack.
[0039] As shown in Figure 3 The four corner upper clamping plate and the four corner lower clamping plate are arranged in a right angle, and one side of the four corner upper clamping plate and the four corner lower clamping plate is parallel to the diagonal line of the lifting platform. In specific implementation, the four corner straightening device can increase the contact area of the screen when clamping, so that the clamping is more stable, and the straightening effect is further improved.
[0040] As shown in Figure 3 The four corner driving device includes a guide rail and a driving plate, the two ends of the driving plate are provided with driving gears, the driving gears are provided with a driving chain therebetween, the driving gears can drive the driving chain to move, the four corner frame body is slidingly connected with the guide rail, and the four corner frame body is fixedly connected with the driving chain and can move with the driving chain. In specific implementation, the driving chain can move with the driving gear, and the chain movement can drive the four corner frame body to move along the guide rail, so as to realize the outward pulling and realize the straightening.
[0041] As shown in Figure 3 The four corner upper clamping plate is also provided with a mounting frame, the mounting frame is perpendicular to the four corner upper clamping plate, the end of the mounting frame away from the four corner upper clamping plate is provided with a supporting rod, and the supporting rod is perpendicular to the mounting frame.
[0042] As shown in Figure 3As shown, the four corners of the upper clamping plate are provided with a tapered clamping piece, and the four corners of the lower clamping plate are provided with a corresponding tapered clamping groove, and the tapered clamping piece can be embedded in the tapered clamping groove. In specific implementation, the tapered clamping piece includes a tapered strip, and two tapered strips are provided in this embodiment, which can be embedded in the corresponding clamping groove, can increase the friction, and further improve the straightening effect.
[0043] As shown in the figure, Figure 4 The four-corner straightening device includes a four-corner air cylinder, a lower fixed strip is fixedly arranged on the four-corner air cylinder, an upper fixed strip is fixedly arranged on the piston rod of the four-corner air cylinder, the upper fixed strip and the lower fixed strip are arranged correspondingly, and the upper fixed strip and the lower fixed strip are arranged along the length direction of the corresponding side of the lifting platform. The upper fixed strip is also provided with a tapered clamping piece, and the lower fixed strip is provided with a corresponding tapered clamping groove. The lower fixed strip is fixedly connected with the four-corner driving device. In specific implementation, the four-corner driving device can drive the lower fixed strip to move, and the four-corner air cylinder can move with the lower fixed strip.
[0044] As shown in the figure, Figure 4 The four-corner driving device includes a driving air cylinder, and the lower fixed strip is fixedly connected to the piston rod of the driving air cylinder. In specific implementation, the driving air cylinder can drive the four-corner straightening device to pull the silk screen for straightening.
[0045] As shown in the figure, Figure 4 The lower fixed strip is provided with a guide column towards the upper fixed strip, the guide column penetrates through the upper fixed strip, and the four corners of the lower clamping plate are also provided with a guide column towards the four corners of the upper clamping plate. The guide column penetrates through the corresponding four corners of the upper clamping plate. In specific implementation, the guide column can play a guiding role, and the clamping is more stable during clamping, thereby further improving the guiding effect.
[0046] Working principle: place the wooden frame on the lifting platform, then arrange the silk screen, then lift the wooden frame through the lifting platform, then bond the silk screen on the wooden frame through glue, and then cut the silk screen to complete the production.
[0047] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.
Claims
1. An automatic net stretcher, characterized by: The machine frame is provided with a lifting platform in the middle, which is driven to move along the vertical direction by a cylinder, and the four sides of the lifting platform are provided with four peripheral straightening devices, and the four corners of the lifting platform are provided with four corner straightening devices, which are used for detachable connection with the screen, and the four peripheral straightening devices and the four corner straightening devices are slidably connected with the machine frame, and the machine frame is correspondingly provided with four peripheral driving devices for driving the four peripheral straightening devices and four corner driving devices for driving the four corner straightening devices.
2. An automatic net stretcher according to claim 1, characterized in that: The four corner straightening devices comprise a four-corner frame body connected with and driven by the four corner driving devices, and the four-corner frame body is fixedly provided with a four-corner cylinder, the four-corner cylinder is fixedly provided with a four-corner lower clamping plate, and the piston rod of the four-corner cylinder is fixedly provided with a four-corner upper clamping plate, which is the same shape as the four-corner lower clamping plate and is correspondingly provided.
3. An automatic net stretcher according to claim 2, characterized in that: The four-corner upper clamping plate and the four-corner lower clamping plate are both arranged in a right angle, and one side of the four-corner upper clamping plate and the four-corner lower clamping plate is parallel to the diagonal line of the lifting platform.
4. An automatic net stretcher according to claim 2, characterized in that: The four corner driving devices comprise guide rails and driving plates, the two ends of the driving plates are provided with driving gears, the driving gears are provided with a driving chain therebetween, the driving gears can drive the driving chain to move, the four corner frame body is slidably connected with the guide rails, and the four corner frame body is fixedly connected with the driving chain and can move with the driving chain.
5. An automatic net stretcher according to claim 2, characterized in that: The four-corner upper clamping plate is also provided with a mounting frame, the mounting frame is arranged vertically to the four-corner upper clamping plate, and the end of the mounting frame away from the four-corner upper clamping plate is provided with a supporting rod arranged vertically to the mounting frame.
6. An automatic net stretcher according to claim 2, characterized in that: The four-corner upper clamping plate is provided with a conical clamping piece towards the four-corner lower clamping plate, and the four-corner lower clamping plate is provided with a corresponding conical clamping groove, and the conical clamping piece can be embedded in the conical clamping groove.
7. An automatic net stretcher according to claim 6, characterized in that: The four peripheral straightening devices comprise a four peripheral cylinder, the four peripheral cylinder is fixedly provided with a lower fixed strip, the piston rod of the four peripheral cylinder is fixedly provided with an upper fixed strip, the upper fixed strip is correspondingly arranged with the lower fixed strip, and the upper fixed strip and the lower fixed strip are both arranged along the length direction of the corresponding side of the lifting platform, the upper fixed strip is also provided with a conical clamping piece, the lower fixed strip is provided with a corresponding conical clamping groove, and the lower fixed strip is fixedly connected with the four peripheral driving device.
8. An automatic net stretcher according to claim 7, characterized in that: The four peripheral driving devices comprise a driving cylinder, and the lower fixed strip is fixedly connected to the piston rod of the driving cylinder.
9. An automatic net stretcher according to claim 7, characterized in that: The lower fixed strip is provided with a guide column towards the upper fixed strip, the guide column penetrates through the upper fixed strip, and the four-corner lower clamping plate is also provided with a guide column towards the four-corner upper clamping plate, and the guide column penetrates through the corresponding four-corner upper clamping plate.