Automatic screen glue printing system capable of preventing glue leakage and dripping

Abstract

The invention discloses an automatic silk screen glue printing system capable of preventing glue leakage and dripping, relates to the field of silk screen printing equipment, and solves the problems that residual glue drips to pollute workpieces and the silk screen cleaning / replacing efficiency is low in a traditional system. The system comprises a main frame, a silk screen body, a lifting mechanism and a rotating mechanism. The main frame is formed by connecting a vertical frame and a transverse frame in a # shape, and the vertical frame is provided with a sliding groove with a notch. Sliding blocks are arranged at the end parts of the silk screen main body; the lifting mechanism comprises a lifting cylinder and a lifting ring; the rotating mechanism comprises a rotating air cylinder and an electromagnetic clamping groove which can synchronously stretch and rotate; and a nylon brush and a rubber scraper capable of reciprocating are arranged on the silk screen main body in an attached manner. During working, the silk screen main body is adsorbed by the electromagnetic clamping groove after descending, and is driven by the rotating cylinder to be separated and overturned, so that residual glue is prevented from dripping on a workpiece, the silk screen does not need to be frequently cleaned / replaced, efficient and continuous printing can be performed, and the device is suitable for industrial batch glue printing.

Description

TECHNICAL FIELD

[0001] The present application relates to an automatic screen printing system capable of preventing glue dripping. BACKGROUND

[0002] Screen printing is a common printing process in industrial production, which transfers printing materials such as glue to the surface of a workpiece through the mesh of a screen to form a predetermined pattern. In a conventional screen printing system, the screen is usually static, and the workpiece below needs to be replaced after printing to perform a cycle operation.

[0003] However, this operation mode has obvious defects: the mesh and surface of the screen are prone to residual glue, which will drip onto the surface of the workpiece below to be printed or the workpiece that has completed printing, resulting in workpiece contamination, reduced printing accuracy, and even workpiece scrap.

[0004] To prevent glue dripping, the existing technology usually uses the method of cleaning the screen after each printing or directly replacing the screen, but both methods will significantly prolong the operation cycle, reduce production efficiency, increase labor and material costs, and are difficult to meet the needs of industrial mass production.

[0005] Therefore, it has become a technical problem to be solved in the field to develop an automatic screen printing system that can prevent residual glue from dripping and contaminating the workpiece while ensuring production efficiency. SUMMARY

[0006] To solve the technical defects of the existing static screen printing system, such as residual glue dripping and contaminating the workpiece, and cleaning / replacing the screen leading to low production efficiency, the present application provides an automatic screen printing system capable of preventing glue dripping, which achieves the technical effects of no glue dripping and contamination and efficient continuous printing. The specific technical solutions are as follows:

[0007] An automatic screen printing system capable of preventing glue dripping, comprising a main frame, a screen body, a lifting mechanism, and a rotating mechanism; the main frame is composed of a vertical frame and a horizontal frame in the shape of a cross, a sliding groove is formed in the vertical frame, a notch is provided in the middle of the sliding groove, and the cross-sectional width of the notch is greater than the main body width of the sliding groove; the end of the screen body is provided with a sliding block, the sliding block is slidingly assembled in the sliding groove and can be separated through the notch; a buckle is provided in the middle of the screen body, and a clamping groove is formed in the upper end of the buckle; the lifting mechanism comprises a lifting cylinder and a lifting ring, the lifting ring is connected to the bottom of the push rod of the lifting cylinder, and can translate forward and backward in the clamping groove; the rotating mechanism comprises a rotating cylinder and an electromagnetic clamping groove, the electromagnetic clamping groove is connected to the output end of the rotating cylinder, a recess structure adapted to the buckle is provided in the middle, and the electromagnetic clamping groove can be powered to attract the buckle; the rotating cylinder can simultaneously complete two kinds of motion of rotation and extension.

[0008] Furthermore, the upper surface of the screen body is provided with a brush and a scraper. The brush is made of nylon bristles and fits into the surface of the screen body. The scraper is made of rubber and can move back and forth along the surface of the screen body.

[0009] The nylon brush attachment can clean residual glue on the screen surface in real time, preventing accumulation and clogging of the mesh; the rubber squeegee is both elastic and wear-resistant, and can evenly scrape and press the glue when moving back and forth, ensuring that the glue is accurately transferred to the workpiece through the mesh, effectively improving the uniformity of printing and the quality of the finished product.

[0010] Furthermore, the surface of the buckle is equipped with a micro switch, which can abut against the surface of the electromagnetic slot to control the power supply to and from the electromagnetic slot.

[0011] Furthermore, the vertical and horizontal frames of the main frame are both made of metal, and the vertical and horizontal frames are fixedly connected by a full welding process, with the welded surfaces being ground and polished.

[0012] The metal material ensures that the main frame can bear sufficient weight and is suitable for long-term industrial operations; the full welding process strengthens the connection strength and avoids deformation; grinding and polishing eliminates welding burrs, which not only prevents scratches to operators, but also reduces dust accumulation and improves the overall durability and cleanliness of the main frame.

[0013] Furthermore, the surface of the slider is hard chrome plated with a thickness of 0.05-0.1 mm; the inner wall roughness of the groove Ra≤0.8 μm, and the fitting clearance between the groove and the slider is 0.1-0.3 mm.

[0014] Smooth chutes and reasonable clearances reduce sliding resistance, prevent jamming, ensure smooth lifting and lowering of the wire mesh body along the chutes, and reduce component wear and frequency of maintenance.

[0015] Furthermore, the entrance of the recessed structure of the electromagnetic slot is provided with an arc guide. In automated connection, this can shorten the buckle alignment time, improve the adsorption efficiency of the electromagnetic slot, ensure a fast and stable connection between the rotating mechanism and the wire mesh body, and guarantee a smooth workflow.

[0016] Furthermore, the lifting cylinder is a double-acting single-piston rod cylinder, and the end of the push rod of the lifting cylinder is provided with a buffer sleeve, which is made of polyurethane.

[0017] The double-acting cylinder enables bidirectional stable drive of the wire mesh body, meeting the requirements for precise lifting; the polyurethane buffer sleeve can absorb the impact force at the end of the lifting process, avoid rigid collision between the cylinder push rod and the lifting ring, protect the components and reduce operating noise, and effectively extend the service life of the lifting mechanism.

[0018] Furthermore, the main body of the wire mesh includes an aluminum alloy frame and a wire mesh fixed inside the frame. The wire mesh material is nylon, the mesh count is 100-200 mesh, and the thickness of the aluminum alloy frame is 8-12mm. Anti-collision pads are provided at the corners of the frame, and the pads are made of nitrile rubber.

[0019] The aluminum alloy frame balances lightweight and rigidity to prevent deformation; the nylon mesh is compatible with adhesives of different viscosities to ensure printing accuracy; the nitrile rubber pads cushion impacts and prevent frame damage, and the overall structure is suitable for industrial batch printing needs.

[0020] Compared with the prior art, the present invention has the following beneficial effects.

[0021] This invention relates to an automated screen printing system for preventing glue dripping. By using a rotating mechanism to rotate the screen body so that residual glue faces upward, it fundamentally avoids glue dripping and contaminating the workpiece. It eliminates the need for frequent screen cleaning or replacement. Combined with a lifting mechanism and a synchronously retractable rotating mechanism, it achieves automated and continuous lifting and rotating of the screen body, significantly improving production efficiency.

[0022] The main frame is made of stainless steel and is fully welded for fixation. The slider surface is plated with hard chrome and fits precisely with the slide groove. The electromagnetic slot has a recessed structure with anti-slip texture to ensure stable and reliable system operation. At the same time, the brush can clean the screen and reduce glue accumulation. The anti-collision pads on the frame protect the components and further extend the service life of the equipment, which can meet the needs of industrial batch precision glue printing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an automated screen printing adhesive system for preventing adhesive leakage, as shown in Example 1.

[0024] Figure 2 This is a schematic diagram of the back structure of an automated screen printing adhesive system designed to prevent adhesive leakage.

[0025] Figure 3 This is a schematic diagram of the structure when the main body of the wire mesh descends to its lowest position;

[0026] Figure 4 This is a schematic diagram of the structure of the wire mesh body after it has been rotated at a certain angle.

[0027] Figure 5 This is a partial structural diagram of the wire mesh body under the control of the lifting device;

[0028] Figure 6 This is a schematic diagram of the micro switch on the back of the wire mesh body;

[0029] Figure 7 This is a partial structural diagram of the wire mesh body being snapped into the electromagnetic slot on the back.

[0030] Figure 8 This is a partial structural diagram of the wire mesh body under the control of a rotating device;

[0031] In the diagram: 1. Vertical frame, 2. Wire mesh body, 3. Brush, 4. Scraper, 5. Electromagnetic slot, 6. Slide, 7. Notch, 8. Slider, 9. Lifting cylinder, 10. Rotating cylinder, 11. Lifting ring, 12. Buckle, 13. Micro switch. Detailed Implementation

[0032] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0033] Example 1: As Figures 1-8 As shown, this embodiment provides an automated screen printing adhesive system to prevent adhesive dripping. The system includes a main frame, a screen body 2, a lifting mechanism, and a rotating mechanism. The main frame is composed of vertical frames 1 and horizontal frames connected in a grid pattern. The vertical frames 1 have grooves 6, and the grooves 6 have notches 7 in the middle. The cross-sectional width of the notches 7 is greater than the width of the main body of the grooves 6.

[0034] The end of the wire mesh body 2 is provided with a slider 8, which is slidably fitted into the slide groove 6 and can be disengaged from the slide groove 6 through the notch 7. The middle part of the wire mesh body 2 is provided with a buckle 12, and the upper end of the buckle 12 has a slot. The lifting mechanism includes a lifting cylinder 9 and a lifting ring 11. The lifting ring 11 is connected to the bottom of the push rod of the lifting cylinder 9 and can move back and forth within the slot of the buckle 12.

[0035] The rotating mechanism includes a rotating cylinder 10 and an electromagnetic slot 5. The electromagnetic slot 5 is connected to the output end of the rotating cylinder 10, and its internal center has a recessed structure adapted to the buckle 12. The electromagnetic slot 5 can attract the buckle 12 by energizing it. In addition, the upper surface of the screen body 2 is provided with a brush 3 and a scraper 4. The brush 3 is made of nylon bristles and fits in contact with the surface of the screen body 2. The scraper 4 is made of rubber and can move back and forth along the surface of the screen body 2.

[0036] The working process of this embodiment is as follows:

[0037] S1. Initial state: The wire mesh body 2 is assembled in the slide groove 6 by the slider 8, the lifting ring 11 is inserted into the slot of the buckle 12, and the electromagnetic slot 5 is in the de-energized state.

[0038] S2. Printing preparation: Place the workpiece to be printed under the screen body 2, start the equipment, and the squeegee 4 moves back and forth along the surface of the screen body 2 to transfer the glue through the screen mesh to the surface of the workpiece, thus completing the printing.

[0039] S3, Lifting action: The lifting cylinder 9 drives the push rod to descend, causing the wire mesh body 2 to slide down along the slide groove 6 to the lowest position. At this time, the buckle 12 is embedded in the recessed structure of the electromagnetic slot 5, and the micro switch 13 abuts against the surface of the electromagnetic slot 5.

[0040] S4. Adsorption and detachment: Micro switch 13 triggers electromagnetic slot 5 to be energized, adsorption buckle 12; rotary cylinder 10 extends and retracts outward, driving the wire mesh body 2 to move outward, lifting ring 11 disengages from slot, and slider 8 disengages from slide groove 6 through notch 7.

[0041] S5. Flipping action: Rotating cylinder 10 drives the screen body 2 to rotate 180°, so that the lower surface of the screen body 2 faces upward, and the residual glue adheres to the upper surface by gravity, preventing it from dripping.

[0042] S6. Cyclic operation: Replace with a new workpiece to be printed and fix the workpiece to be printed on the mounting brackets at both ends of the screen body;

[0043] S7. Rotary cylinder 10 rotates 180° in the opposite direction and retracts, slider 8 re-enters slide groove 6, lifting ring 11 is engaged in slot, electromagnetic slot 5 is de-energized, lifting cylinder 9 drives screen body 2 to rise to printing position, and repeats the above printing steps.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automated screen printing adhesive system to prevent adhesive dripping, characterized in that, Includes the main frame, wire mesh body (2), lifting mechanism and rotating mechanism; The main frame is composed of vertical frame (1) and horizontal frame connected in a grid pattern. A sliding groove (6) is provided on the vertical frame (1), and a notch (7) is provided in the middle of the sliding groove (6). The cross-sectional width of the notch (7) is greater than the main width of the sliding groove (6). The wire mesh body (2) is provided with a slider (8) at one end. The slider (8) is slidably fitted into the groove (6) and can be disengaged through the notch (7). The wire mesh body (2) is provided with a buckle (12) in the middle. The buckle (12) has a slot at its upper end. The lifting mechanism includes a lifting cylinder (9) and a lifting ring (11). The lifting ring (11) is connected to the bottom of the push rod of the lifting cylinder (9) and can move back and forth in the slot. The rotating mechanism includes a rotating cylinder (10) and an electromagnetic slot (5). The electromagnetic slot (5) is connected to the output end of the rotating cylinder (10). The middle part is provided with a recessed structure that is compatible with the buckle (12). The electromagnetic slot (5) can be energized to attract the buckle (12). The rotating cylinder (10) can simultaneously complete the two movements of rotation and extension.

2. The automated screen printing adhesive system for preventing adhesive dripping according to claim 1, characterized in that, The upper surface of the wire mesh body (2) is provided with a brush (3) and a scraper (4). The brush (3) is made of nylon bristles and fits against the surface of the wire mesh body (2). The scraper (4) is made of rubber and can move back and forth along the surface of the wire mesh body (2).

3. The automated screen printing adhesive system for preventing adhesive dripping according to claim 2, characterized in that, The surface of the buckle (12) is equipped with a micro switch (13), which can abut against the surface of the electromagnetic slot (5) to control the electromagnetic slot (5) to turn on and off.

4. The automated screen printing adhesive system for preventing adhesive dripping according to claim 1, characterized in that, The vertical frame (1) and horizontal frame of the main frame are both made of metal, and the vertical frame (1) and horizontal frame are fixedly connected by full welding process, and the surface of the welded part is polished.

5. The automated screen printing adhesive system for preventing adhesive dripping according to claim 4, characterized in that, The surface of the slider (8) is plated with hard chrome and the plating thickness is 0.05-0.1mm; the inner wall roughness Ra of the groove (6) is ≤0.8μm, and the fitting gap between the groove (6) and the slider (8) is 0.1-0.3mm.

6. The automated screen printing adhesive system for preventing adhesive dripping according to claim 4, characterized in that, The entrance of the recessed structure of the electromagnetic card slot (5) is provided with an arc guide.

7. An automated screen printing adhesive system for preventing adhesive dripping according to claim 4, characterized in that, The lifting cylinder (9) is a double-acting single-piston rod cylinder. The end of the push rod of the lifting cylinder (9) is provided with a buffer sleeve, which is made of polyurethane.

8. An automated screen printing adhesive system for preventing adhesive dripping according to any one of claims 1-7, characterized in that, The main body of the wire mesh (2) includes an aluminum alloy frame and a wire mesh fixed inside the frame. The wire mesh is made of nylon and has a mesh count of 100-200. The thickness of the aluminum alloy frame is 8-12mm. Anti-collision pads are provided at the corners of the frame. The pads are made of nitrile rubber.

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