Back cover plate makeup screen printing device

Abstract

The utility model relates to a back cover plate makeup screen printing device which comprises a supporting platform, a horizontal conveying mechanism is arranged on the upper surface of the supporting platform, side face clamping and positioning mechanisms are arranged on the two sides of the conveying mechanism, a front driving rotating shaft is arranged on one side of the conveying mechanism, and a back driving rotating shaft is arranged on the other side of the conveying mechanism. The front driving rotating shaft and the rear driving rotating shaft are both vertically installed and connected with a rotation driving mechanism, a horizontal front gear lever is fixedly arranged on the front driving rotating shaft, and a horizontal rear gear lever is fixedly arranged on the rear driving rotating shaft; a lifting platform is arranged above the supporting platform, and a screen printing plate, a printing ink adding mechanism and a scraper mechanism are arranged on the lower surface of the lifting platform. The rear cover plate feeding and discharging device can achieve automatic feeding and discharging of the rear cover plate, manual operation is not needed in the whole screen printing process, labor cost can be saved, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to silk screen printing technical field especially, it is a kind of back cover plate plate making silk screen printing device. BACKGROUND

[0002] Screen printing (i.e., silk printing) is a common printing technology, widely used in the surface printing of various materials, such as paper, plastic, metal, glass, textiles, etc. In the production process of the back cover plate of mobile phones and other electronic devices, the designed pattern can be printed on the outer wall of the back cover plate through the silk printing process. The silk printing process is as follows: a screen is made according to the design pattern, the screen is covered on the outer wall of the back cover plate, the part that does not need to be printed is sealed by the photosensitive glue of the screen, and the ink cannot pass through; then the ink is poured on the screen; the ink is evenly scraped over the screen with a scraper, and the ink is printed on the printing material through the open part of the screen; after printing is completed, the ink needs to be dried or cured, usually by natural air drying, drying or ultraviolet curing.

[0003] The utility model discloses a four plate making screen printing equipment, including frame, the frame upper end is connected with support, support inside upper wall is connected with slide rail, the slide rail outer end is connected with slide table, the utility model discloses, through the setting of fixed mechanism, when the screen printing plate is fixed, is removed and is replaced, through the rotation handle drive screw rod rotation, makes the wedge block left and right horizontal shift movement, and then the ejector rod drives the push block up and down movement, makes the clamping rod around the pin shaft tightly clamps or releases the screen printing plate, so that the screen printing plate can be quickly fixed or removed, and different screen printing plates are conveniently replaced, and the working efficiency is improved. The novel screen printing plate structure of the four plate making screen is set, which can improve the work efficiency and reduce the labor intensity during printing, and is suitable for mass production to reduce the cost of enterprise production products. Although the equipment is convenient for replacing the screen printing plate, it is not convenient for feeding and discharging the printing material, which affects the efficiency. UTILITY MODEL CONTENTS

[0004] The utility model discloses a four plate making screen printing device, including frame, the frame upper end is connected with support, support inside upper wall is connected with slide rail, the slide rail outer end is connected with slide table, the utility model discloses, through the setting of fixed mechanism, when the screen printing plate is fixed, is removed and is replaced, through the rotation handle drive screw rod rotation, makes the wedge block left and right horizontal shift movement, and then the ejector rod drives the push block up and down movement, makes the clamping rod around the pin shaft tightly clamps or releases the screen printing plate, so that the screen printing plate can be quickly fixed or removed, and different screen printing plates are conveniently replaced, and the working efficiency is improved. The novel screen printing plate structure of the four plate making screen is set, which can improve the work efficiency and reduce the labor intensity during printing, and is suitable for mass production to reduce the cost of enterprise production products. Although the equipment is convenient for replacing the screen printing plate, it is not convenient for feeding and discharging the printing material, which affects the efficiency.

[0005] To solve the above problems, the utility model adopts the technical scheme as follows: a back cover plate plate making silk screen printing device, including support platform, the upper surface of support platform is provided with horizontal transmission mechanism, both sides of transmission mechanism are provided with side clamping positioning mechanism, one side of transmission mechanism is provided with front drive shaft, the other side of transmission mechanism is provided with rear drive shaft, front drive shaft and rear drive shaft are vertically installed and are connected with rotary drive mechanism, front drive shaft is fixedly provided with horizontal front stop rod, rear drive shaft is fixedly provided with horizontal rear stop rod, the upper portion of support platform is provided with lifting platform, the lower surface of lifting platform is provided with screen, ink adding mechanism and scraper mechanism.

[0006] Further, the lower surface of the lifting platform is provided with a moving base, the moving base is connected with a translation driving mechanism for driving the moving base to move linearly back and forth, and the ink adding mechanism and the scraper mechanism are arranged on the moving base.

[0007] Further, the ink adding mechanism comprises a spray head, the spray head is connected with a storage container through a hose, and an ink pump is arranged on the hose.

[0008] Further, the scraper mechanism comprises a pressure mechanism, and the lower end of the pressure mechanism is provided with a scraper.

[0009] Further, the translation driving mechanism comprises a servo motor, the servo motor is connected with a lead screw, the lead screw penetrates through the moving base and is in threaded cooperation with the moving base, and the moving base is in sliding cooperation with the lifting platform.

[0010] Further, the lower surface of the lifting platform is provided with a plurality of vertical positioning columns, the lower end of the positioning column is provided with a screen plate positioning mechanism, and the edge of the screen plate is fixed to the screen plate positioning mechanism.

[0011] Further, the screen plate positioning mechanism comprises a telescopic column, the lower end surface of the positioning column is provided with a center blind hole, the upper end of the telescopic column extends into the center blind hole and is in sliding cooperation with the center blind hole, a spring is arranged between the upper end surface of the telescopic column and the bottom of the center blind hole, the lower end of the telescopic column is provided with a positioning block, the side wall of the positioning block is provided with a positioning groove, and the edge of the screen plate extends into the positioning groove and is fixed by being pressed and fixed by screws.

[0012] Further, the side face clamping positioning mechanism comprises a clamping plate, and the clamping plate is connected with a clamping driving mechanism.

[0013] Further, the transmission mechanism is a transmission belt.

[0014] Further, the upper side of the lifting platform is provided with a support frame, the support frame is provided with a vertical guide column, the guide column is in sliding cooperation with the lifting platform, and a lifting mechanism is arranged between the lifting platform and the support frame.

[0015] The beneficial effects of the utility model are: the utility model can utilize the transmission mechanism to convey the back cover plate of electronic equipment to the support flat, utilize the front stopper, the rear stopper and the side face clamping positioning mechanism to clamp the back cover plate, make the back cover plate keep fixed. Then the lifting platform drives the screen plate to move downwards, makes the screen plate stick to the back cover plate, then utilizes the ink adding mechanism to spray ink to the screen plate, utilizes the scraper mechanism to evenly scrape the ink through the screen plate. After screen printing, the lifting platform resets upwards, and the transmission mechanism conveys the back cover plate to the drying station.

[0016] It can be seen that the automatic feeding and discharging of the back cover plate can be realized, manual operation is not needed in the whole silk screen printing process, labor cost can be saved, and production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view schematic diagram of the utility model;

[0018] Figure 2 is Figure 1 is a sectional view schematic diagram of A-A in the utility model;

[0019] Figure 3 is Figure 1 is a sectional view schematic diagram of B-B in the utility model;

[0020] Figure 4 is a top view schematic diagram of positioning the back cover plate;

[0021] Figure 5 is Figure 4 is a sectional view schematic diagram of C-C in the utility model;

[0022] Sign: 1 - support platform; 2 - transmission mechanism; 3 - front drive shaft; 4 - rear drive shaft; 5 - rotary drive mechanism; 6 - front stop lever; 7 - rear stop lever; 8 - lifting platform; 9 - screen; 10 - moving seat; 11 - translation drive mechanism; 12 - spray head; 13 - storage container; 14 - ink pump; 15 - pressure mechanism; 16 - doctor blade; 17 - positioning column; 18 - telescopic column; 19 - spring; 20 - positioning block; 21 - positioning groove; 22 - screw; 23 - clamping plate; 24 - clamping drive mechanism; 25 - support frame; 26 - guide column; 27 - lifting mechanism. DETAILED DESCRIPTION

[0023] The utility model is further explained in connection with the drawings and examples.

[0024] The back cover plate assembly screen printing device of the utility model, such as Figures 1 to 5As shown, including support platform 1, support platform 1 is horizontally arranged, can adopt a certain thickness of stainless steel plate, its bottom is provided with a group of support legs, so that the support platform 1 is at the appropriate height. The upper surface of the support platform 1 is provided with a horizontal transmission mechanism 2, which can drive the back cover plate to move to the support platform 1, and can drive the completed silk screen printing back cover plate to move to the next station, realizing the automatic feeding and discharging of the back cover plate. The two sides of the transmission mechanism 2 are provided with side clamping positioning mechanisms, which are used to clamp the two side edges of the back cover plate. One side of the transmission mechanism 2 is provided with a front drive shaft 3, and the other side of the transmission mechanism 2 is provided with a rear drive shaft 4. The front and rear directions are referred to as the transmission direction of the transmission mechanism 2, and the transmission mechanism 2 can drive the back cover plate to move from the rear to the front. The front drive shaft 3 and the rear drive shaft 4 are vertically installed and connected with a rotating drive mechanism 5, and the front drive shaft 3 is fixedly provided with a horizontal front stop rod 6, and the rear drive shaft 4 is fixedly provided with a horizontal rear stop rod 7. When the rotating drive mechanism 5 drives the front drive shaft 3 and the rear drive shaft 4 to rotate, the front stop rod 6 and the rear stop rod 7 will rotate synchronously, so that the front stop rod 6 and the rear stop rod 7 can move from outside the transmission mechanism 2 to above the transmission mechanism 2, and the front stop rod 6 and the rear stop rod 7 are perpendicular to the transmission mechanism 2. The rotating drive mechanism 5 can adopt a stepping motor, which can accurately control the rotation angle. The front stop rod 6 can position the front end of the back cover plate, and the rear stop rod 7 can position the rear end of the back cover plate. The front stop rod 6, the rear stop rod 7 and the side clamping positioning mechanism cooperate to stably position the back cover plate, ensuring that the back cover plate remains fixed during silk screen printing. The upper side of the support platform 1 is provided with a lifting platform 8, which can be lifted and lowered. The lower surface of the lifting platform 8 is provided with a screen 9, an ink adding mechanism and a scraper mechanism. The screen 9 adopts a spliced screen, that is, the screen 9 has a plurality of patterns, which can complete the printing of a plurality of patterns at a time, which can improve the efficiency.

[0025] The silk printing process of the utility model is as follows: firstly, the front driving shaft 3 is rotated by the rotary driving mechanism 5, so that the front stop rod 6 moves to the top of the transmission mechanism 2 and is perpendicular to the transmission mechanism; the back cover plate is placed on the transmission mechanism 2, the transmission mechanism 2 transports the back cover plate to the top of the support platform 1, when the front end of the back cover plate contacts the front stop rod 6, the back cover plate stops moving, at this time, the transmission mechanism 2 also stops moving; then, the rear driving shaft 4 is rotated by the rotary driving mechanism 5, so that the rear stop rod 7 moves to the top of the transmission mechanism 2 and is perpendicular to the transmission mechanism, at this time, the distance between the rear stop rod 7 and the front stop rod 6 is equal to the length of the back cover plate, therefore, the rear stop rod 7 can abut against the rear end of the back cover plate, and the two side edges of the back cover plate are clamped by the side clamping positioning mechanism, so that the back cover plate is kept fixed. Next, the lifting platform 8 moves downwards until the screen 9 is close to the upper surface of the back cover plate, then the ink adding mechanism sprays ink on the screen 9, then the scraper mechanism uniformly scrapes the ink on the screen 9. After the silk printing is completed, the lifting platform 8 drives the screen 9, the ink adding mechanism and the scraper mechanism to reset upwards, the side clamping positioning mechanism releases the back cover plate, the rotary driving mechanism 5 drives the rear driving shaft 4 and the front driving shaft 3 to rotate, the rear driving shaft 4 and the front driving shaft 3 drive the rear stop rod 7 and the front stop rod 6 to move out of the transmission mechanism 2, so that the transmission mechanism 2 is started to transport the back cover plate to the next station.

[0026] It can be seen that the utility model can realize the automatic feeding and discharging of the back cover plate, the whole silk printing process does not need manual operation, the labor cost can be saved, and the production efficiency is improved.

[0027] In order to realize the uniform ink spraying of the ink adding mechanism and the reciprocating movement of the scraper mechanism to realize the uniform ink scraping, the lower surface of the lifting platform 8 is provided with a moving seat 10, the moving seat 10 is connected with a translation driving mechanism 11 for driving the moving seat 10 to move linearly, and the ink adding mechanism and the scraper mechanism are arranged on the moving seat 10. When the translation driving mechanism 11 pushes the moving seat 10 to move linearly, the ink adding mechanism and the scraper mechanism move synchronously with the moving seat 10, so that the ink adding mechanism can move in a large range, thereby uniformly spraying the ink on the screen 9, and at the same time, the scraper mechanism can also move linearly to uniformly scrape the ink on the whole surface of the screen 9.

[0028] Specifically, the translation driving mechanism 11 can adopt a cylinder, a hydraulic cylinder or the like, as a preferred embodiment, the translation driving mechanism 11 comprises a servo motor, the servo motor is connected with a lead screw, the lead screw penetrates through the moving seat 10 and is in threaded cooperation with the moving seat 10, and the moving seat 10 is in sliding cooperation with the lifting platform 8. A sliding groove can be arranged on the lower surface of the lifting platform 8, the sliding groove can be a dovetail groove, the top of the moving seat 10 is provided with a dovetail-shaped sliding block, the sliding block is located in the sliding groove and is in sliding cooperation with the sliding groove. When the servo motor drives the lead screw to rotate, the lead screw can push the moving seat 10 to move linearly under the action of the thread.

[0029] The ink adding mechanism comprises a nozzle 12, the nozzle 12 is connected with a storage container 13 through a hose, and an ink pump 14 is arranged on the hose. The storage container 13 is made of stainless steel or corrosion-resistant plastic container and is used for storing ink. The volume of the storage container 13 is generally 1-5 liters. The storage container 13 can be sealed, and the gas in the storage container 13 cannot be discharged during the silk-screen process, so that the ink is prevented from volatilizing or being contaminated. In addition, a stirring mechanism can be arranged in the storage container 13 to prevent the ink from depositing. The hose can be made of corrosion-resistant silica gel tube. The ink pump 14 can be a gear pump or a peristaltic pump. If the viscosity of the ink is high, the gear pump is used to ensure the stable flow of the delivered ink. If the viscosity of the ink is low, the peristaltic pump is used. The storage container 13 and the ink pump 14 can be fixedly installed on the lifting platform 8, and the nozzle 12 is installed on the moving seat 10.

[0030] The scraper mechanism comprises a pressure mechanism 15, and the lower end of the pressure mechanism 15 is provided with a scraper 16. The pressure mechanism 15 can be a cylinder or the like. The scraper 16 and the nozzle 12 are both above the screen plate 9. The pressure mechanism 15 can push the scraper 16 to move downwards, so that the scraper 16 contacts the screen plate 9.

[0031] In order to facilitate the installation of the screen plate 9, the lower surface of the lifting platform 8 is provided with a plurality of vertical positioning columns 17, the lower end of the positioning column 17 is provided with a screen plate positioning mechanism, and the edge of the screen plate 9 is fixed to the screen plate positioning mechanism. The positioning column 17 can be 4, the screen plate 9 is rectangular, and the four corners of the screen plate 9 are fixed to the screen plate positioning mechanism.

[0032] The screen plate positioning mechanism comprises a telescopic column 18, the lower end surface of the positioning column 17 is provided with a center blind hole, the upper end of the telescopic column 18 extends into the center blind hole and is in sliding fit with the center blind hole, and the upper end surface of the telescopic column 18 and the bottom of the center blind hole are provided with a spring 19; the lower end of the telescopic column 18 is provided with a positioning block 20, the side wall of the positioning block 20 is provided with a positioning groove 21, the edge of the screen plate 9 extends into the positioning groove 21 and is tightly fixed by a screw 22. The screen plate 9 can be locked by the screw 22, so that the screen plate 9 can be conveniently replaced. Since the spring 19 is arranged in the positioning column 17, when the screen plate 9 moves downwards to contact the back cover plate, the spring 19 can play a buffering role.

[0033] In the utility model, the side clamping positioning mechanism comprises a clamping plate 23, the clamping plate 23 is connected with a clamping driving mechanism 24, and the clamping driving mechanism 24 can be a cylinder, a hydraulic cylinder, a linear motor or the like. The clamping driving mechanism 24 drives the clamping plate 23 to move, and the moving direction is perpendicular to the moving direction of the conveying mechanism 2, so that the clamping plate 23 can clamp the two side edges of the back cover plate.

[0034] In the utility model, transmission mechanism 2 is conventional transmission belt, transmission belt is horizontally arranged, and support platform 1 can support transmission belt, and the transmission belt can be prevented from deforming when being subjected to downward pressure.

[0035] In order to promote the stable lifting of lifting platform 8, the upper portion of lifting platform 8 is provided with support frame 25, the vertical guide column 26 is arranged on support frame 25, the guide column 26 is in sliding fit with lifting platform 8, and the guide column 26 can play the role of guiding and positioning. Lifting mechanism 27 is arranged between lifting platform 8 and support frame 25, and lifting mechanism 27 can be hydraulic cylinder and the like, and can push lifting platform 8 to lift.

[0036] The above only is the preferred embodiment of the utility model and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A screen printing device for rear cover plate assembly, characterized in that: The system includes a support platform (1), on the upper surface of which a horizontal transmission mechanism (2) is provided. Side clamping and positioning mechanisms are provided on both sides of the transmission mechanism (2). A front drive shaft (3) is provided on one side of the transmission mechanism (2), and a rear drive shaft (4) is provided on the other side of the transmission mechanism (2). The front drive shaft (3) and the rear drive shaft (4) are both vertically installed and connected to a rotation drive mechanism (5). A horizontal front stop bar (6) is fixedly provided on the front drive shaft (3), and a horizontal rear stop bar (7) is fixedly provided on the rear drive shaft (4). A lifting platform (8) is provided above the support platform (1), and a screen (9), an ink adding mechanism, and a scraper mechanism are provided on the lower surface of the lifting platform (8).

2. The rear cover plate screen printing device as described in claim 1, characterized in that: The lower surface of the lifting platform (8) is provided with a movable seat (10), and the movable seat (10) is connected to a translation drive mechanism (11) that drives the movable seat (10) to reciprocate linearly. The ink adding mechanism and the scraper mechanism are provided on the movable seat (10).

3. The rear cover plate screen printing device as described in claim 2, characterized in that: The ink adding mechanism includes a nozzle (12), which is connected to a storage container (13) via a hose, and an ink pump (14) is provided on the hose.

4. The rear cover plate screen printing device as described in claim 2, characterized in that: The scraper mechanism includes a pressure mechanism (15), and a scraper (16) is provided at the lower end of the pressure mechanism (15).

5. The rear cover plate screen printing device as described in claim 2, characterized in that: The translation drive mechanism (11) includes a servo motor, which is connected to a lead screw. The lead screw passes through the movable seat (10) and is threadedly engaged with the movable seat (10). The movable seat (10) is slidably engaged with the lifting platform (8).

6. The rear cover plate screen printing device as described in claim 1, characterized in that: The lower surface of the lifting platform (8) is provided with multiple vertical positioning columns (17), and the lower end of the positioning column (17) is provided with a screen positioning mechanism. The edge of the screen (9) is fixed to the screen positioning mechanism.

7. The rear cover plate screen printing device as described in claim 6, characterized in that: The screen positioning mechanism includes a telescopic column (18), the lower end face of the positioning column (17) is provided with a central blind hole, the upper end of the telescopic column (18) extends into the central blind hole and slides with the central blind hole, and a spring (19) is provided between the upper end face of the telescopic column (18) and the bottom of the central blind hole; the lower end of the telescopic column (18) is provided with a positioning block (20), the side wall of the positioning block (20) is provided with a positioning groove (21), and the edge of the screen (9) extends into the positioning groove (21) and is pressed and fixed by screws (22).

8. The rear cover plate screen printing device as described in claim 1, characterized in that: The side clamping and positioning mechanism includes a clamping plate (23), and the clamping plate (23) is connected to a clamping drive mechanism (24).

9. The rear cover plate screen printing device as described in claim 1, characterized in that: The transmission mechanism (2) is a transmission belt.

10. The rear cover plate screen printing device as described in claim 1, characterized in that: A support frame (25) is provided above the lifting platform (8), and a vertical guide column (26) is provided on the support frame (25). The guide column (26) slides with the lifting platform (8), and a lifting mechanism (27) is provided between the lifting platform (8) and the support frame (25).

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