Screen printer with support bar positioning pulley

Abstract

The utility model relates to the field of silk screen printing equipment discloses a silk screen printing machine with support post positioning pulley, including mounting seat, the front of mounting seat is provided with silk screen frame, the front of mounting seat is swingly installed with doctor blade support through stabilizing mechanism, the silk screen frame is connected with mounting seat through fixed mechanism, the stabilizing mechanism includes guide rail, support column and adjusting screw, the guide rail fixed connection is in the front of mounting seat, the support column is slidably connected on the inner wall of doctor blade support, the surface of support column is provided with pulley. In the utility model, through setting pulley on support column and cooperating with the triangular horizontal sliding slot of guide rail, utilize the low friction that pulley rolls generation, effectively reduced the resistance in the movement process of doctor blade support, reduced the track deviation due to vibration, the low friction design of pulley and sliding slot avoids the support to be jammed, ensures that the ink evenly shifts to the printing material.

Description

Technical Field

[0001] This utility model relates to the field of screen printing equipment, and in particular to a screen printing machine with a support rod positioning pulley. Background Technology

[0002] The full name of the screen printing machine is "screen printing machine". It is a device that uses a screen to transfer solder paste or adhesive onto the PCB pads. It is mainly used in the electronics processing industry for screen printing markings on printed circuit boards, markings on instrument housing panels, and solder paste printing during circuit board processing. Screen printing is a printing technology that transfers ink to a substrate through a screen printing plate. Its core principle is to use the selective ink permeability of the screen mesh. The mesh openings in the image areas can allow ink to pass through, while the non-image areas are blocked. By applying pressure with a squeegee, the ink is squeezed from the mesh openings onto the surface of the substrate to form the desired pattern. It is used to improve the stability of the squeegee movement and printing accuracy, and is suitable for high-density PCB board processing.

[0003] Traditional screen printing machines use linear guides or ball bearings to connect the squeegee holder and the screen frame. During high-speed operation, vibration can easily cause the squeegee trajectory to deviate, affecting ink uniformity and pattern accuracy. At the same time, the impact load on the squeegee during ink scraping is transmitted to the holder through the guide rail, causing low-frequency vibration, which leads to uneven ink distribution in the mesh. When printing high-density circuit boards, the ink thickness deviation increases, which seriously affects the circuit conductivity. To address these issues, a screen printing machine with a support rod positioning pulley is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a screen printing machine with a support rod positioning pulley, which aims to improve the problem in the prior art that "vibration causes the squeegee trajectory to deviate, affecting ink uniformity and pattern accuracy".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a screen printing machine with a support rod positioning pulley, including a mounting base. A screen frame is provided on the front side of the mounting base. A squeegee bracket is movably mounted on the front side of the mounting base via a stabilizing mechanism. The screen frame is connected to the mounting base via a fixing mechanism. The stabilizing mechanism includes a guide rail, a support column, and an adjusting screw. The guide rail is fixedly connected to the front side of the mounting base. The support column is slidably connected to the inner wall of the squeegee bracket. A pulley is provided on the surface of the support column. Transverse grooves for guiding the rolling direction of the pulley are provided on both the upper and lower sides of the guide rail. A scale line is provided on the front side of the guide rail. The adjusting screw passes through the interior of the guide rail and cooperates with the threaded hole on the surface of the guide rail.

[0006] As a further description of the above technical solution:

[0007] The number of support columns is set to multiple, and the pulley is rotatably installed on one side of the multiple support columns that are close to each other.

[0008] As a further description of the above technical solution:

[0009] The cross-sectional shape of the transverse slide is set as a triangle, and the outer wall of the pulley fits against the inner wall of the transverse slide.

[0010] As a further description of the above technical solution:

[0011] The fixing mechanism includes a connecting frame, which is fixedly connected to the front of the mounting base, and a U-shaped frame is fixedly connected to the end of the connecting frame away from the mounting base.

[0012] As a further description of the above technical solution:

[0013] The connecting frame is L-shaped and can be detachably connected to the U-shaped frame by fixing bolts.

[0014] As a further description of the above technical solution:

[0015] The fixing mechanism also includes a screw that passes through the U-shaped frame and engages with a threaded hole on the surface of the U-shaped frame. A knob is fixedly connected to the top of the screw.

[0016] As a further description of the above technical solution:

[0017] The fixing mechanism also includes a pressure block, which is fixedly connected to the bottom of the screw, and the bottom of the pressure block is in contact with the top of the wire mesh frame.

[0018] As a further description of the above technical solution:

[0019] The two ends of the wire mesh frame are located inside the U-shaped frame, and the side of the wire mesh frame away from the pressure block is in contact with the bottom of the inner wall of the U-shaped frame.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by setting pulleys on the support column and cooperating with the triangular transverse groove of the guide rail, the low friction generated by the rolling of the pulleys effectively reduces the resistance of the doctor blade support during the movement process, reduces the trajectory deviation caused by vibration, and the low friction design of the pulleys and grooves prevents the support from jamming, ensuring that the ink is evenly transferred to the substrate.

[0022] 2. In this utility model, the pressure of the pressure block on the screen frame is adjusted by adjusting the screw with a knob. The operation is simple and quick, and the installation and disassembly of the screen frame can be completed in a short time. At the same time, it ensures the stability and fixation of the screen frame during the printing process, prevents the screen from shifting due to vibration, further ensures the printing quality, and meets the high-precision printing requirements of high-density PCB boards, etc. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional exploded structure of this utility model;

[0025] Figure 3 This utility model Figure 2 An enlarged 3D structural diagram at point A in the middle;

[0026] Figure 4 This is a three-dimensional cross-sectional view of the scraper support and stabilizing mechanism in this utility model;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the mounting base and guide rail in this utility model.

[0028] Legend:

[0029] 1. Mounting base; 2. Wire mesh frame; 3. Scraper bracket; 101. Connecting bracket; 102. U-shaped bracket; 103. Fixing bolt; 104. Knob; 105. Screw; 106. Pressure block; 10. Fixing mechanism; 11. Stabilizing mechanism; 111. Guide rail; 112. Support column; 113. Pulley; 114. Transverse slide groove; 115. Scale line; 116. Adjusting screw. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 and Figure 2The present invention provides an embodiment of a screen printing machine with a support rod positioning pulley, including a mounting base 1. The device is mounted on the frame of the screen printing machine via the mounting base 1. A screen frame 2 is provided on the front of the mounting base 1 for fixing the screen printing plate and contacting the substrate to achieve ink transfer. A squeegee bracket 3 is movably mounted on the front of the mounting base 1 via a stabilizing mechanism 11 for supporting the squeegee. It is driven by a hydraulic cylinder to achieve reciprocating motion and complete the ink scraping and ink return actions. The screen frame 2 is connected to the mounting base 1 via a fixing mechanism 10.

[0032] Reference Figure 2 , Figure 4 and Figure 5 The stabilizing mechanism 11 includes a guide rail 111, a support column 112, and an adjusting screw 116. The guide rail 111 is fixedly connected to the front of the mounting base 1 and is used to provide the linear motion trajectory of the scraper bracket 3 to ensure the stability of the motion direction. The support column 112 is slidably connected to the inner wall of the scraper bracket 3. A pulley 113 is provided on the surface of the support column 112. The outer layer of the pulley 113 is nitrile rubber, and the inner layer is an aluminum alloy spindle. The number of support columns 112 is set to multiple, and the pulley 113 is rotatably installed on the side where multiple support columns 112 are close to each other.

[0033] Reference Figure 4 and Figure 5 The guide rail 111 has transverse grooves 114 on both the upper and lower sides to guide the rolling direction of the pulley 113. Through the rolling cooperation between the pulley 113 and the transverse groove 114, the rolling friction coefficient is ≤0.05, which reduces the frictional resistance compared with the traditional slider structure and improves the smoothness of movement. The cross-sectional shape of the transverse groove 114 is set as a triangle with a vertices angle of 60°. The outer wall of the pulley 113 fits against the inner wall of the transverse groove 114. The guide rail 111 has scale lines 115 on the front. The adjusting screw 116 passes through the interior of the guide rail 111 and cooperates with the threaded hole on the surface of the guide rail 111. The pressure between the pulley 113 and the transverse groove 114 is adjusted by adjusting the adjusting screw 116.

[0034] Reference Figure 2 and Figure 3 The fixing mechanism 10 includes a connecting frame 101, which is fixedly connected to the front of the mounting base 1. A U-shaped frame 102 is fixedly connected to the end of the connecting frame 101 away from the mounting base 1. The connecting frame 101 is L-shaped and can be detachably connected to the U-shaped frame 102 by fixing bolts 103, so as to realize the quick installation and disassembly of the wire mesh frame 2.

[0035] Reference Figure 2 and Figure 3The fixing mechanism 10 also includes a screw 105, which passes through the U-shaped frame 102 and engages with a threaded hole on the surface of the U-shaped frame 102. A knob 104 is fixedly connected to the top of the screw 105. The surface of the knob 104 is provided with anti-slip texture. The pressure of the pressure block 106 on the wire mesh frame 2 is adjusted by the knob 104 to ensure its fixing stability. The fixing mechanism 10 also includes a pressure block 106, which is fixedly connected to the bottom of the screw 105. The bottom of the pressure block 106 is in contact with the top of the wire mesh frame 2. Both ends of the wire mesh frame 2 are located inside the U-shaped frame 102. The side of the wire mesh frame 2 away from the pressure block 106 is in contact with the bottom of the inner wall of the U-shaped frame 102.

[0036] Working principle: When in use, insert both ends of the screen frame 2 into the U-shaped frame 102. By adjusting the screw 105 and rotating the knob 104, the bottom of the pressure block 106 is made to fit against the top of the screen frame 2. At the same time, the side of the screen frame 2 away from the pressure block 106 contacts the bottom of the inner wall of the U-shaped frame 102 to complete the fixation. The connecting frame 101 and the U-shaped frame 102 are locked by the fixing bolt 103 to ensure that the screen frame 2 will not shift during the printing process.

[0037] The scraper bracket 3 is connected to the mounting base 1 via the stabilizing mechanism 11: the pulley 113 of the support column 112 is embedded in the triangular transverse groove 114 of the guide rail 111, and the outer wall of the pulley 113 is in contact with the inner wall of the transverse groove 114 to form a low-friction rolling guide. The adjusting screw 116 finely adjusts the gap between the pulley 113 and the transverse groove 114 through the threaded hole on the surface of the guide rail 111. By rotating the adjusting screw 116, the support column 112 squeezes the pulley 113, pressing the rubber of the pulley 113 into the guide rail 111 to generate friction. This allows for fine adjustment and fixation of the position of the scraper bracket 3 to achieve the optimal printing position.

[0038] The motor of the screen printing machine drives the squeegee support 3 to reciprocate along the guide rail 111. The pulley 113 rolls in the transverse groove 114, reducing the linearity deviation of the squeegee support 3's movement trajectory and avoiding uneven ink distribution caused by squeegee shaking. The squeegee applies pressure to transfer ink from the screen mesh to the substrate surface. During the ink return stroke, the ink return plate recovers the untransferred ink, completing a single printing cycle. The fixing mechanism 10 maintains the stability of the screen frame 2 through the continuous pressure of the pressure block 106, preventing screen displacement due to vibration during printing.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screen printing machine with a support rod positioning pulley, comprising a mounting base (1), characterized in that: The front of the mounting base (1) is provided with a wire mesh frame (2), and the front of the mounting base (1) is movably mounted with a scraper bracket (3) through a stabilizing mechanism (11). The wire mesh frame (2) is connected to the mounting base (1) through a fixing mechanism (10). The stabilizing mechanism (11) includes a guide rail (111), a support column (112), and an adjusting screw (116). The guide rail (111) is fixedly connected to the front of the mounting base (1). The support column (112) is slidably connected to the inner wall of the scraper bracket (3). A pulley (113) is provided on the surface of the support column (112). A transverse groove (114) for guiding the rolling direction of the pulley (113) is provided on both the upper and lower sides of the guide rail (111). A scale line (115) is provided on the front of the guide rail (111). The adjusting screw (116) passes through the interior of the guide rail (111) and cooperates with the threaded hole on the surface of the guide rail (111).

2. The screen printing machine with a support rod positioning pulley according to claim 1, characterized in that: The number of the support columns (112) is set to multiple, and the pulley (113) is rotatably installed on one side of the multiple support columns (112) that are close to each other.

3. The screen printing machine with a support rod positioning pulley according to claim 1, characterized in that: The cross-sectional shape of the transverse groove (114) is set as a triangle, and the outer wall of the pulley (113) is in contact with the inner wall of the transverse groove (114).

4. The screen printing machine with a support rod positioning pulley according to claim 1, characterized in that: The fixing mechanism (10) includes a connecting frame (101), which is fixedly connected to the front of the mounting base (1), and a U-shaped frame (102) is fixedly connected to the end of the connecting frame (101) away from the mounting base (1).

5. The screen printing machine with a support rod positioning pulley according to claim 4, characterized in that: The connecting frame (101) is L-shaped and is detachably connected to the U-shaped frame (102) by fixing bolts (103).

6. The screen printing machine with a support rod positioning pulley according to claim 5, characterized in that: The fixing mechanism (10) also includes a screw (105), which passes through the U-shaped frame (102) and engages with the threaded hole on the surface of the U-shaped frame (102). A knob (104) is fixedly connected to the top of the screw (105).

7. The screen printing machine with a support rod positioning pulley according to claim 6, characterized in that: The fixing mechanism (10) also includes a pressure block (106), which is fixedly connected to the bottom of the screw (105), and the bottom of the pressure block (106) is in contact with the top of the wire mesh frame (2).

8. The screen printing machine with a support rod positioning pulley according to claim 7, characterized in that: The two ends of the wire mesh frame (2) are located inside the U-shaped frame (102), and the side of the wire mesh frame (2) away from the pressure block (106) is in contact with the bottom of the inner wall of the U-shaped frame (102).

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