A screen printing machine screen mounting plate positioning mechanism
By adding a second brass screen plate positioning sleeve to the screen printing machine, the positioning pin of the guide frame moves, solving the problem of inaccurate positioning, improving the stability and accuracy of the equipment, and reducing the wear and maintenance costs of the rotating support.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINTON KAYEX TECH CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-07
AI Technical Summary
In existing screen printing machines, the positioning pins of the screen frame are inaccurate because the cylinder piston rod is suspended and there is no guiding structure, which affects the stability and accuracy of the equipment. Furthermore, long-term vibration causes wear on the rotating support.
A second brass positioning sleeve is added to the bottom surface of the rotating support. The movement of the positioning pin of the mesh frame is guided by the guide structure. Combined with the first positioning sleeve, precise positioning is achieved, avoiding direct contact with the rotating support and reducing wear.
It improves the positioning accuracy and operational stability of the equipment, reduces the equipment failure rate and maintenance costs, and reduces the wear of the rotating support.
Smart Images
Figure CN224465456U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a positioning mechanism for a screen printing machine frame mounting plate, belonging to the field of screen printing machine technology. Background Technology
[0002] In the printing head module of a screen printing machine, the screen frame mounting plate, as a part that directly cooperates with the screen, determines the positional accuracy of the screen directly, and further affects the overall working status of the screen printing machine.
[0003] In existing technology, the relative position between the printing head and the screen is generally determined by a movable positioning pin mounted on a cylinder and a screen positioning sleeve fixed to the screen frame mounting plate. The cylinder is mounted on a rotating support, and the screen positioning sleeve is mounted on the screen frame mounting plate. During operation, the movable positioning pin and the cylinder piston rod are generally suspended in the internal opening of the rotating support. During positioning, the cylinder piston rod extends, and the positioning pin engages with the screen positioning sleeve to complete the positioning.
[0004] In the existing technology, the piston rod of the cylinder is suspended and there is no guide structure between it and the rotating support. When the cylinder installation accuracy is poor or the cylinder mounting surface is offset due to long-term vibration, the concentricity of the piston rod and the internal opening of the rotating support cannot be guaranteed. After the positioning pin extends, it may deviate from the predetermined position, causing positioning difficulties and affecting the working status of the screen printing machine. Utility Model Content
[0005] This utility model proposes a positioning mechanism for the screen printing machine frame mounting plate. Its purpose is to overcome the above-mentioned shortcomings of the existing technology, prevent the frame positioning pin from deviating from the preset position, reduce the positioning difficulty of the frame mounting plate, protect the rotating support from direct rubbing against the frame positioning pin, improve the stability of equipment operation, and reduce maintenance costs.
[0006] The technical solution of this utility model is as follows: A screen printing machine frame mounting plate positioning mechanism, the structure of which includes a cylinder, a first screen plate positioning sleeve, a rotating support, a frame mounting plate and a screen plate. The cylinder is mounted on the top surface of the rotating support, and a screen frame positioning pin is installed at the end of the cylinder piston rod. The first screen plate positioning sleeve is installed in the step on the top surface of the frame mounting plate. The center of the first screen plate positioning sleeve is provided with a conical recess that matches the shape of the end of the screen frame positioning pin. The frame mounting plate is fixedly connected to the screen plate. It also includes a second screen plate positioning sleeve, which is mounted on the bottom surface of the rotating support. The screen frame positioning pin is located in the center hole of the second screen plate positioning sleeve. The screen frame positioning pin and the second screen plate positioning sleeve are concentric. The first screen plate positioning sleeve is installed below the second screen plate positioning sleeve. During operation, the cylinder piston rod extends, driving the screen frame positioning pin to move vertically downwards along the guide of the center hole of the second screen plate positioning sleeve, engaging with the first screen plate positioning sleeve mounted on the screen frame mounting plate. The first screen plate positioning sleeve then moves the pin to a precise preset position, adjusting the position and angle of the screen frame mounting plate and the screen, ultimately completing the precise positioning action and ensuring the relative position of the screen and the printing head. Adding the second screen plate positioning sleeve ensures the coaxiality between the screen frame positioning pin and the opening of the rotating support, guaranteeing the direction and position of the pin's movement during positioning, improving equipment stability and printing accuracy, and reducing equipment failure rates. Simultaneously, it prevents the screen frame positioning pin from directly contacting the rotating support, creating a hard limit and reducing the probability of damage to the aluminum rotating support, thus lowering operating and maintenance costs.
[0007] Preferably, the second mesh plate positioning sleeve is a brass positioning sleeve.
[0008] Preferably, the mesh frame mounting plate has mesh frame fixing plates on both sides. The mesh frame fixing plates are L-shaped, and the top of the mesh frame fixing plates is fixed to the bottom edge of the rotating support. Several ball-head plungers are arranged in a straight line along the length of the vertical portion of the mesh frame fixing plates facing the mesh frame mounting plate. This is used to limit the degree of freedom and range of motion of the mesh frame mounting plate, and reduce the difficulty of aligning the mesh frame positioning pins with the first mesh plate positioning sleeve.
[0009] Preferably, the bottom surface of the rotating support is provided with a step that matches the outer diameter of the second mesh plate positioning sleeve, and the second mesh plate positioning sleeve is installed in the step on the bottom surface of the rotating support.
[0010] Preferably, the second mesh plate positioning sleeve is fixed to the rotating support by two hexagonal head screws.
[0011] Preferably, the second mesh plate positioning sleeve, the rotating support, and the mesh frame positioning pin are all clearance fits.
[0012] The advantages of this utility model are: reasonable structural design; based on the existing technical structure, a new positioning sleeve made of brass is added to the rotating support, which can reduce the floating range of the mesh frame positioning pin and the cylinder piston rod, reduce the probability of mispositioning of the mesh frame positioning pin, ensure the accuracy of the movement direction and position of the mesh frame positioning pin during the positioning process, improve the stability of equipment operation and printing accuracy, and reduce the equipment failure rate; at the same time, it can avoid hard contact between the mesh frame positioning pin and the rotating support, reduce the wear of the aluminum rotating support, and reduce operating and maintenance costs. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the positioning mechanism for the screen printing machine frame mounting plate of this utility model.
[0014] Figure 2 This is a cross-sectional structural schematic diagram of the positioning mechanism for the screen printing machine frame mounting plate of this utility model.
[0015] Figure 3 This is a schematic diagram of the structure of the cylinder, the first screen plate positioning sleeve, and the second screen plate positioning sleeve in the positioning mechanism of the screen printing machine frame mounting plate of this utility model.
[0016] In the diagram, 1 is the cylinder, 2 is the mesh frame positioning pin, 3 is the first mesh plate positioning sleeve, 4 is the second mesh plate positioning sleeve, 5 is the rotating support, 6 is the mesh frame mounting plate, 7 is the mesh plate, 8 is the internal hexagon socket head cap screw, 9 is the mesh frame fixing plate, and 10 is the ball head plunger. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.
[0018] like Figure 1 As shown, a screen printing machine frame mounting plate positioning mechanism includes a cylinder 1, a first screen plate positioning sleeve 3, a second screen plate positioning sleeve 4, a rotating support 5, a frame mounting plate 6, and a screen plate 7. The first screen plate positioning sleeve 3 is an existing structure, and a second screen plate positioning sleeve 4 (preferably made of brass) is added to it. The second screen plate positioning sleeve 4 is installed on the bottom surface of the rotating support 5, and the cylinder 1 is installed on the top surface of the rotating support 5. A frame positioning pin 2 is installed at the end of the piston rod of the cylinder 1. The frame positioning pin 2 is located in the center hole of the second screen plate positioning sleeve 4 and is concentric with the second screen plate positioning sleeve 4. The first screen plate positioning sleeve 3 is installed in the step on the top surface of the frame mounting plate 6 below the second screen plate positioning sleeve 4. The center of the first screen plate positioning sleeve 3 has a conical recess that matches the shape of the end of the frame positioning pin 2. The frame mounting plate 6 is fixedly connected to the screen plate 7, and the screen plate 7 moves synchronously with the frame mounting plate 6.
[0019] The mesh frame mounting plate 6 has mesh frame fixing plates 9 on both sides. The mesh frame fixing plates 9 are L-shaped. The top of the mesh frame fixing plates 9 is fixed to the bottom edge of the rotating support 5. Several ball-head plungers 10 are arranged in a straight array along the length of the vertical part of the mesh frame fixing plates 9 facing the mesh frame mounting plate 6. These are used to limit the degree of freedom and range of motion of the mesh frame mounting plate 6 and reduce the difficulty of matching the mesh frame positioning pin 2 with the first mesh plate positioning sleeve 3.
[0020] During operation, the piston rod of cylinder 1 extends, driving the screen frame positioning pin 2 to move vertically downward along the guide of the center hole of the second screen plate positioning sleeve 4, cooperating with the first screen plate positioning sleeve 3 installed on the screen frame mounting plate 6; the range of motion of the screen frame mounting plate 6 is limited by the ball-head plungers 10 arrayed on the screen frame fixing plate 9, and is driven by the first screen plate positioning sleeve 3 to the accurate preset position, adjusting the position and angle of the screen frame mounting plate 6 and the screen plate 7, and finally completing the precise positioning action to ensure the relative position of the screen plate 7 and the printing head.
[0021] Adding a second screen plate positioning sleeve 4 between the rotating support 5 and the screen frame positioning pin 2 can ensure the coaxiality between the screen frame positioning pin 2 and the opening of the rotating support 5, ensure the movement direction and position of the screen frame positioning pin 2 during the positioning process, improve the stability of equipment operation and printing accuracy, and reduce equipment failure rate; at the same time, it avoids the screen frame positioning pin 2 from directly contacting the rotating support 5 to form a hard limit, reduces the probability of damage to the aluminum rotating support 5, and reduces operating and maintenance costs.
[0022] In the specific design, the bottom surface of the rotating support 5 is provided with a step that matches the outer diameter of the second mesh plate positioning sleeve 4, and the second mesh plate positioning sleeve 4 is installed in the step on the bottom surface of the rotating support 5. The second mesh plate positioning sleeve 4 is fixed to the rotating support 5 by two internal hexagon head screws 8. The second mesh plate positioning sleeve 4, the rotating support 5, and the mesh frame positioning pin 2 are all clearance fits.
[0023] In actual use, each printing station is equipped with a positioning mechanism for the screen printing machine frame mounting plate described above.
[0024] The cylinder 1, mounted on the rotating support 5, extends, and the screen frame positioning pin 2 moves along the second screen plate positioning sleeve 4. The first screen plate positioning sleeve 3 is fixed on the screen frame mounting plate 6, and the screen plate 7 is fixedly connected to the screen frame mounting plate 6. Therefore, the positioning accuracy of the first screen plate positioning sleeve 3 determines the position of the screen plate 7. The adjacent ends of the screen frame positioning pin 2 and the first screen plate positioning sleeve 3 have convex and concave conical surfaces with the same angle, which can play a guiding and fitting role, ensuring the fit and positioning accuracy between the screen frame positioning pin 2 and the first screen plate positioning sleeve 3. After the screen frame positioning pin 2 is driven by the cylinder 1 to accurately fit with the first screen plate positioning sleeve 3, the relative position of the first screen plate positioning sleeve 3 and the printing head is determined. At the same time, it drives the connected screen frame mounting plate 6 and screen plate 7 to move to the preset position, finally realizing the accurate positioning of the screen plate 7 in the printing head module, ensuring the stability of the screen printing machine operation and reducing the equipment failure rate.
[0025] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.
[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.
Claims
1. A screen printing machine frame mounting plate positioning mechanism, comprising a cylinder (1), a first screen plate positioning sleeve (3), a rotating support (5), a frame mounting plate (6), and a screen plate (7), wherein the cylinder (1) is mounted on the top surface of the rotating support (5), a frame positioning pin (2) is mounted on the end of the piston rod of the cylinder (1), the first screen plate positioning sleeve (3) is mounted in a step on the top surface of the frame mounting plate (6), the center of the first screen plate positioning sleeve (3) is provided with a conical recess that matches the shape of the end of the frame positioning pin (2), and the frame mounting plate (6) is fixedly connected to the screen plate (7), characterized in that, It also includes a second mesh plate positioning sleeve (4), which is installed on the bottom surface of the rotating support (5). The mesh frame positioning pin (2) is located in the center hole of the second mesh plate positioning sleeve (4). The mesh frame positioning pin (2) is concentric with the second mesh plate positioning sleeve (4). The first mesh plate positioning sleeve (3) is installed below the second mesh plate positioning sleeve (4).
2. The screen printing machine frame mounting plate positioning mechanism as described in claim 1, characterized in that, The second mesh plate positioning sleeve (4) is a brass positioning sleeve.
3. The screen printing machine frame mounting plate positioning mechanism as described in claim 1, characterized in that, The mesh frame mounting plate (6) is provided with mesh frame fixing plates (9) on both sides. The mesh frame fixing plates (9) are L-shaped. The top of the mesh frame fixing plates (9) is fixed to the bottom edge of the rotating support (5). The mesh frame fixing plates (9) are provided with a number of ball head plungers (10) in a straight line array along the length direction on the vertical part facing the mesh frame mounting plate (6).
4. The screen printing machine frame mounting plate positioning mechanism as described in claim 1, characterized in that, The bottom surface of the rotating support (5) is provided with a step that matches the outer diameter of the second mesh plate positioning sleeve (4), and the second mesh plate positioning sleeve (4) is installed in the step on the bottom surface of the rotating support (5).
5. The screen printing machine frame mounting plate positioning mechanism as described in claim 1, characterized in that, The second mesh plate positioning sleeve (4) is fixed to the rotating support (5) by two internal hexagonal head screws (8).
6. The screen printing machine frame mounting plate positioning mechanism as described in claim 1, characterized in that, The second mesh plate positioning sleeve (4) is clearance-fitted with the rotating support (5) and the mesh frame positioning pin (2).