Screen printing detection assembly

Abstract

The present application relates to the technical field of equipment for screen printing, and particularly relates to a detection assembly equipment for printing screen. The equipment comprises a rack, a shaping device, an end ring mounting device, a screen sticking device, a detection mechanism and a transmission mechanism. The bottom of the rack is sequentially provided with a shaping station, a detection station and a mounting station from left to right. The shaping device is arranged at the shaping station. The detection mechanism is arranged at the detection station. The end ring mounting device and the screen sticking device are arranged at the mounting station. The end ring mounting device comprises a supporting mechanism, a lifting mechanism and a fixing seat. The present application can realize mechanical scanning detection of the through hole on the screen, and the camera detection can replace the human eye detection, thereby improving the detection accuracy. The flexible screen cylinder is adsorbed by negative pressure suction, which can ensure that the screen cylinder is synchronously unfolded according to the predetermined shape, so that the screen cylinder is constrained and the installation of the end ring is ensured. The present application can improve the installation accuracy and precision and reduce the damage of the screen cylinder caused by the installation process of the end ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment for screen printing, in particular to a detection and assembly equipment for printing screens. BACKGROUND

[0002] Screen printing is a process of transferring a design from a stencil to a flat surface using a screen, ink, and a squeegee. A flexible thin-walled screen cylinder is an important component, and the screen is provided with printing mesh holes. The screen cylinder is formed by inserting two end rings into the two ends of the flexible thin-walled screen cylinder and bonding them.

[0003] Due to the high cost and complex processing technology (coating + laser engraving graphics) of the flexible cylindrical laser-engraved screen printing plate, it is easy to fold, leak, and block, and problems may occur in the processing, packaging, and transportation links, so it is necessary to check and timely feedback the screen before use, and most importantly, to ensure the printing quality of the product and reduce unnecessary economic losses. The traditional detection method is to manually check the graphics with a magnifying glass to see if there is a blockage, and to check the screen for creases by the naked eye. The efficiency is low, the detection accuracy is low, and it is inevitable that there will be missed detection or conditions that cannot be seen. This will affect the printing quality and the work efficiency is low. After checking, the end ring needs to be installed. The end ring is a ring-shaped metal product, and the end ring is divided into upper, middle and lower three parts. The upper part is a tapered guide ring, the middle part is a cylindrical support ring, and the bottom part is an installation ring. The support ring is in interference fit with the screen, the end of the screen cylinder is sleeved on the support ring and bonded, the installation ring is used to connect with the printing equipment, and the connection between the guide ring and the cylinder is transitionally connected. The end of the screen cylinder is provided with a glue hole, and then the edge of the screen cylinder is manually coated with glue and dried. Since the screen cylinder is flexible and needs to be in interference fit with the end ring, at least two experienced operators are needed to carefully sleeve the screen cylinder on the end ring during the net bonding process. The operation is complicated and requires experienced operators. If not careful, it will cause the screen to have creases or even tear, causing great economic losses. Moreover, during the glue coating process, due to the curvature of the screen cylinder, the glue needs to be coated and dried at the same time to prevent the glue from blocking the screen printing plate. In view of this situation, an equipment is urgently needed to efficiently check and install the end ring before screen printing, so as to improve the production efficiency and quality. SUMMARY

[0004] The present application provides a detection and assembly equipment for printing screens, which can realize vertical state monitoring of the screen cylinder, realize negative pressure adsorption and support of the round screen cylinder, and install the end ring, thereby improving the quality and efficiency of installing the end ring and improving the quality of glue coating.

[0005] The present application solves the technical problems by the following technical solutions,

[0006] A printing screen detection assembly device, comprising a rack, a forming device, an end ring mounting device, a screen sticking device, a detection mechanism and a transmission mechanism, the bottom of the rack is sequentially provided with a shaping station, a detection station and a mounting station from left to right, the forming device is arranged at the shaping station, the detection mechanism is arranged at the detection station, the end ring mounting device and the screen sticking device are arranged at the mounting station, and the transmission mechanism is arranged at the top of the rack and transmits the cylindrical screen cylinder between the shaping station, the detection station and the mounting station.

[0007] The end ring mounting device comprises a supporting mechanism, a lifting mechanism and a fixed seat, the fixed seat is located at the bottom of the mounting station, the lifting mechanism is located above the fixed seat, the supporting mechanism comprises a plurality of arc-shaped shaping arms and an opening and closing mechanism, the opening and closing mechanism is fixed to the movable end of the lifting mechanism, the opening and closing mechanism drives the shaping arms to open and close, the shaping arms form a circle after being embraced, and the lifting mechanism drives the opening and closing mechanism to lift.

[0008] The above-mentioned printing screen detection assembly device is further provided with an air channel, a suction hole, an air pipe and a negative pressure source, the air channel is arranged in the shaping arm, the inner side wall of the shaping arm is uniformly provided with the suction hole, and the suction hole is communicated with the air channel and the outside; the negative pressure source is provided with a controllable valve, and the air pipe is communicated with the valve of the negative pressure source and the air channel.

[0009] The above-mentioned printing screen detection assembly device, the screen sticking device comprises a support, a turnover driving mechanism, a supporting shaft, a fixed disc, a rotary motor and a supporting arm, the support is fixed on the support, the support is provided with a shaft hole, the turnover driving mechanism is connected with the top end of the supporting arm, the turnover driving mechanism drives the supporting arm to turn over, the fixed disc is detachably connected with the supporting shaft, the edge of the fixed disc is provided with a clamp, the clamp fixes the upper end ring to the fixed disc, the lifting mechanism is fixed on the supporting arm, the supporting arm is L-shaped, the rotary motor is installed at the bottom end of the supporting arm, the rotary motor drives the supporting shaft to rotate, the fixed seat is fixed at the bottom of the supporting shaft, and the rotary motor drives the supporting shaft and the fixed seat to rotate.

[0010] The above-mentioned printing screen detection assembly device, the forming device comprises a guide table and a shaping table, the guide table is conical, the diameter of the shaping table is consistent with the inner diameter of the screen cylinder, the guide table is arranged at the top of the shaping table, and the bottom of the guide table is transitionally connected with the shaping table.

[0011] The above-mentioned printing screen detection assembly device, the lifting mechanism comprises a lifting linear sliding table and a mounting seat, the lifting linear sliding table is fixed on the supporting arm, the sliding block of the lifting linear sliding table is fixedly connected with the rear side of the mounting seat, and the front side of the mounting seat is fixedly connected with the opening and closing mechanism.

[0012] The detection assembly device of the printing screen, the turnover driving mechanism comprises a first servo motor and a reducer, the power output end of the reducer is connected with the back of the support arm, the transmission mechanism comprises a transverse linear slide, a longitudinal linear slide, a clamping arm and two second servo motors, the transverse linear slide drives the longitudinal linear slide to move horizontally, the clamping arm is fixed on the sliding block of the longitudinal linear slide, and the second servo motors drive the transverse linear slide and the longitudinal linear slide to move respectively.

[0013] The detection assembly device of the printing screen, the working stop point of the shaping arm driven by the sliding block of the lifting mechanism during movement is provided with four upper end ring mounting points, suction points, confirmation stop points and pushing stop points, the upper end ring mounting point is the height of supporting the top end of the screen, the suction point is the height of the upper edge close to the screen bonding part, the height of the confirmation stop point is the height of the screen bottom end reaching the middle part of the guide ring, and the pushing stop point is the height of the screen bottom end reaching the bottom part of the mounting ring.

[0014] The detection assembly device of the printing screen, the fixed seat is provided with a fixing tool, the upper end ring fixing tool comprises a pressing block and a pressing screw rod, and the top end and the bottom end of the pressing screw rod are respectively screwed with the pressing block and the fixed seat.

[0015] A positioning tool is further arranged, the positioning tool comprises a clamping ring and a connecting ring, the diameter of the clamping ring is greater than that of the connecting ring, the outer diameter of the connecting ring is matched with the inner diameter of the screen cylinder, and the clamping ring and the connecting ring are integrally formed.

[0016] The opening and closing mechanism comprises a third servo motor, a sliding groove, a screw rod and two opening and closing sliding blocks, opposite external threads are arranged on the two sides of the screw rod, the two ends of the screw rod are rotatably connected in the sliding groove, screw holes are arranged in the two opening and closing sliding blocks respectively, the two opening and closing sliding blocks are screwed with the two ends of the screw rod respectively, one end of the screw rod penetrates out of the sliding groove and is connected with the driving end of the third servo motor, and the two shaping arms are connected with the rear ends of the two shaping arms respectively.

[0017] The detection assembly device of the printing screen, the detection mechanism comprises a lamp cylinder, a supporting rotating mechanism and a scanning mechanism, the scanning mechanism comprises a detection camera, a camera support, a detection linear slide and a display, the detection camera is installed on the detection linear slide through the camera support, and the detection camera is electrically connected with the display.

[0018] The support rotating mechanism comprises a lower fixed ring, a sleeve, a fixed shaft, a rotating motor, a rotating support and a fixed support, the lower fixed ring supports the wire mesh, the sleeve is connected with the lower fixed ring through the fixed support, the fixed shaft penetrates through the sleeve, the bottom of the fixed shaft is fixed on the support, the fixed shaft is connected with the sleeve through the rotating support, and the rotating motor drives the sleeve to rotate; and the power line of the lamp sleeve penetrates through the fixed shaft and is communicated with the external power supply.

[0019] The detection assembly device of the printing screen is also provided with a protective cover which is a hollow cylindrical tube made of acrylic material, the lamp sleeve is located in the hollow cylindrical tube made of acrylic material, and the lamp sleeve faces the scanning mechanism.

[0020] Compared with the prior art, the mechanical scanning detection of the screen hole can be realized, the camera detection can replace the human eye detection, and the detection accuracy is improved. The flexible screen cylinder is adsorbed by negative pressure suction, the screen cylinder can be synchronously unfolded according to the predetermined shape, the screen cylinder is constrained, the installation of the end ring is guaranteed, the installation accuracy and precision are improved, and the damage of the screen cylinder caused by the installation process of the end ring is reduced. During the gluing process, the efficiency can be improved, the gluing of the adhesive parts at the two ends of the screen cylinder is only needed at the installation station, one-side rotation and one-side airing can be realized, the overflow of the glue during the airing process is prevented, and the probability that the screen printing plate hole is blocked by the glue is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the present application (support shaft vertical state);

[0022] Figure 2 is a structural schematic view of the present application (support shaft horizontal state);

[0023] Figure 3 is a structural schematic view of the installation station of the present application;

[0024] Figure 4 is a front structural schematic view of the present application;

[0025] Figure 5 is Figure 4 is a local enlarged view of A part in the middle;

[0026] Figure 6 is a principle view of the opening and closing mechanism of the present application;

[0027] Figure 7 is a sectional structural schematic view of the shaping arm of the present application;

[0028] Figure 8 is a structural schematic view of the positioning tool of the present application;

[0029] The markings in the attached diagram represent: 1. Frame, 2. Mounting station, 3. Shaping station, 4. Fixed base, 5. Shaping arm, 6. Air duct, 7. Suction hole, 8. Vent pipe, 9. Support arm, 10. Support, 11. Support shaft, 12. Fixed plate, 13. Rotary motor, 15. Guide table, 16. Shaping table, 17. Lifting linear slide, 18. Mounting base, 19. First servo motor, 20. Inspection station, 21. Transverse linear slide, 22. Longitudinal linear slide, 23. Clamping arm, 25. Pressure block, 26. Clamping screw, 27. Clamping ring, 28. Connecting ring, 29. Third servo motor, 30. Slide groove, 31. Lead screw, 32. Opening and closing slider, 33. Inspection camera, 34. Camera bracket, 35. Inspection linear slide rail, 36. 37. Lamp tube, 38. Lower fixing ring, 39. Sleeve, 40. Fixing shaft, 41. Rotary motor, 42. Rotary bearing, 43. Fixing bracket, 44. Protective cover. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention.

[0031] like Figures 1 to 8 As shown, the machine includes a frame 1, a forming device, an end ring mounting device, a wire mesh gluing device, a detection mechanism, and a transmission mechanism. From left to right, the bottom of the frame 1 is sequentially equipped with a shaping station 2, a detection station 20, and an installation station 3. The forming device is located at the shaping station 2 to pre-shape the wire mesh tube. The detection mechanism is located at the detection station 20. The end ring mounting device and the wire mesh gluing device are located at the installation station 3. The transmission mechanism is located at the top of the frame 1 and transfers the cylindrical wire mesh tube between the shaping station 2, the detection station 20, and the installation station 3 to facilitate the installation of the upper and lower end rings.

[0032] The end ring mounting device includes a support mechanism, a lifting mechanism, and a fixed base 4. The fixed base 4 is located at the bottom of the mounting station 3, and the lifting mechanism is located above the fixed base 4. The support mechanism includes multiple arc-shaped shaping arms 5 and an opening and closing mechanism. The opening and closing mechanism is fixed to the movable end of the lifting mechanism. The opening and closing mechanism drives the shaping arms 5 to open and close. After the shaping arms 5 are closed, they form a circle. The lifting mechanism drives the opening and closing mechanism to rise and fall.

[0033] See Figure 6The opening and closing mechanism drives the shaping arm 5 to open and close, and the shaping arm 5 forms a circle after being closed. The device is also provided with an air passage 6, a suction hole 7, a ventilation pipe 8 and a negative pressure source. The air passage 6 is arranged in the shaping arm 5, and the inner side wall of the shaping arm 5 is uniformly provided with the suction hole 7. The suction hole 7 is connected with the air passage 6 and the outside. The negative pressure source is provided with a controllable valve, and the ventilation pipe 8 is connected with the valve of the negative pressure source and the air passage 6, so as to provide negative pressure for the suction hole 7. The lifting mechanism drives the adsorption base to lift. After the shaping arm 5 is closed, the side wall of the wire mesh can be adsorbed outward through the suction hole 7, and the shaping arm 5 is attached to the outer wall of the wire mesh, so that the wire mesh forms a stable cylinder to play a shaping role.

[0034] In order to realize stable lifting, the lifting mechanism includes a lifting linear slide and a mounting seat 18. The lifting linear slide can be a commercially available linear slide. The lifting linear slide is fixed on the supporting arm 9, and the sliding block of the lifting linear slide is fixedly connected with the rear side of the mounting seat 18. The front side of the mounting seat 18 is fixedly connected with the opening and closing mechanism. The mounting seat 18 connects the opening and closing mechanism and the lifting linear slide, so that the lifting linear slide drives the opening and closing mechanism and the shaping arm 5 to move up and down, thereby ensuring that the shaping arm 5 operates on the wire mesh cylinder.

[0035] Since the wire mesh cylinder is relatively soft and collapsed, it is necessary to support the radial direction of the wire mesh cylinder before clamping operation and form a cylindrical shape. Therefore, a forming device is arranged, and a positioning tool is also arranged. Referring to Figure 8 The positioning tool includes a clamping ring 27 and a connecting ring 28. The diameter of the clamping ring 27 is greater than the diameter of the connecting ring 28. The outer diameter of the connecting ring 28 matches the inner diameter of the wire mesh cylinder, and the clamping ring 27 and the connecting ring 28 are integrally formed. The forming device includes a guide table 15 and a shaping table 16. The guide table 15 is conical, and the diameter of the shaping table 16 matches the inner diameter of the wire mesh cylinder. The guide table 15 is arranged on the top of the shaping table 16, and the bottom of the guide table 15 is transitionally connected with the shaping table 16. The bottom end of the wire mesh cylinder is inserted into the guide table 15 and falls onto the shaping table 16. The shaping table 16 supports the wire mesh cylinder to form a cylinder. Then, the connecting ring 28 of the positioning tool is manually placed on the top of the wire mesh cylinder and is stuck by adhesive tape. The transmission mechanism can convey the wire mesh cylinder to the detection station 20 by grabbing the clamping ring 27. The transmission mechanism includes a transverse linear slide 21, a longitudinal linear slide 22, a clamping arm 23 and two second servo motors. The transverse linear slide 21 drives the longitudinal linear slide 22 to move transversely. The clamping arm 23 is fixedly connected with the sliding block of the longitudinal linear slide 22. The second servo motors drive the transverse linear slide 21 and the longitudinal linear slide 22 to move, respectively.

[0036] The detection mechanism includes a lamp cylinder 36, a support rotating mechanism and a scanning mechanism, the scanning mechanism includes a detection camera 33, a camera support 34, a detection linear slide 35 and a display, the detection camera 33 is installed on the detection linear slide 35 through the camera support 34, and the detection camera 33 is electrically connected with the display. The light of the lamp cylinder 36 is irradiated from inside to outside on the screen cylinder, the detection camera 33 outside the screen cylinder photographs the position needing to be detected, so that the image is transmitted to the display through the detection camera 33, and magnified observation is realized.

[0037] Referring to Figure 4 and Figure 5 , in order to facilitate the camera detection of the monitoring area of different positions of the screen cylinder, a support rotating mechanism is arranged, the support rotating mechanism includes a lower fixed ring 37, a sleeve 38, a fixed shaft 39, a rotating motor 40, a rotating support 41 and a fixed support 42, the lower fixed ring 37 supports the screen, the sleeve 38 is connected with the lower fixed ring 37 through the fixed support 42, the fixed shaft 39 penetrates through the sleeve 38, the bottom of the fixed shaft 39 is fixed on the support, the fixed shaft 39 is connected with the sleeve 38 through the rotating support 41, and the rotating motor 40 drives the sleeve 38 to rotate; the power line of the lamp cylinder 36 penetrates through the fixed shaft 39 and is connected with an external power supply. When the transmission mechanism delivers the screen cylinder and the positioning tool to the detection station 20, then the screen cylinder is placed on the lower fixed ring 37, the lower fixed ring 37 supports the bottom end of the screen cylinder, then the clamping arm is opened, the rotating motor 40 drives the sleeve 38 to rotate around the fixed shaft 39, the lower fixed ring 37 is also synchronously rotated, then the lamp cylinder 36 irradiates the screen cylinder, the detection camera 33 photographs the position needing to be checked and transmits to the display, the operator can magnify the observation according to the image on the display, and the detection precision is greatly improved.

[0038] In order to prevent collision with the lamp cylinder 36, a protective cover 43 is further arranged, the protective cover 43 is a hollow cylindrical cylinder made of acrylic material, the lamp cylinder 36 is located in the hollow cylindrical cylinder made of acrylic material, and the lamp cylinder 36 is located on the side of the scanning mechanism.

[0039] But the emergence of hole or is serious quality problems, can be found and replaced and handled in time. When the inspection qualified, the drive mechanism of the clamping arm clamping ring 27 and the screen cylinder lifting and moving horizontally to the installation station 3. The fixed seat 4 on the preloading lower end ring, and fixed on the fixed seat 4 through the fixed tool lower end ring. The clamping arm 23 clamping ring 27 across the support shaft 11, the screen to the lower end ring above, and then the shaping arm 5 to the bottom of the screen cylinder, and in the adsorption point position to hold the adsorption shaping. Then the lifting mechanism with screen cylinder down, the lower end ring is installed on the screen cylinder. Then, the positioning tool from the screen cylinder, the shaping arm 5 clamping the top of the upper end ring and adsorption, manual press the upper end ring to the top of the screen cylinder, and then install the fixed disc 12, the upper end ring and the fixed disc 12 stable connection, can keep the upper end ring and the support shaft 11 synchronous movement.

[0040] In order to prevent the process of inserting the lower end ring to the screen from damage, ensure the accurate insertion of the lower end ring to the bottom of the screen cylinder, the slider of the lifting mechanism with the shaping arm 5 action work stop point is provided with four, respectively, the upper end ring installation point, adsorption point, confirmation stop point and push point, the upper end ring installation point for the shaping arm 5 to support the height of the top of the screen cylinder, the adsorption point close to the upper edge of the height of the screen bonding part, the confirmation stop point height for the shaping arm 5 with the bottom of the screen cylinder to reach the middle of the guide ring height, the push point for the shaping arm 5 with the bottom of the screen cylinder to reach the installation ring bottom height. When the lifting mechanism with the shaping arm 5 to the confirmation stop point, artificial inspection screen cylinder can fall into the support ring, if found screen cylinder offset, stop, artificial correction, if can accurately inserted into the support ring, the lifting mechanism with the shaping arm 5 continue to decline to the bottom of the support ring, the work of the lower end ring inserted into the screen cylinder is completed.

[0041] Specifically, the sticky net device comprises a support arm 9, a support base 10, a turnover driving mechanism, a support shaft 11, a fixed disc 12, a rotary motor 13, and the support base 10 is fixed on the support, the support base 10 is provided with a shaft hole, the turnover driving mechanism is connected with the top end of the support arm 9, the turnover driving mechanism drives the support arm 9 to overturn, the turnover driving mechanism can drive the screen cylinder to reciprocate and overturn in the vertical and horizontal states through the support arm 9, the fixed disc 12 is detachably connected with the support shaft 11, the fixed disc 12 is provided with a clamp on the edge, and the clamp fixes the upper end ring on the fixed disc 12. The turnover driving mechanism comprises a first servo motor 19 and a speed reducer, and the power output end of the speed reducer is connected with the back of the support arm 9. The lifting mechanism is fixed on the support arm 9, the support arm 9 is L-shaped, the rotary motor 13 is installed at the bottom end of the support arm 9, the fixed seat 4 is fixed at the bottom of the support shaft 11, and the rotary motor 13 drives the support shaft 11 to rotate. Thus, the screen cylinder on the support shaft 11 is rotated, at this time, the edge of the rotating screen cylinder can be manually coated with glue, the glue enters the glue penetrating hole, and the glue is dried while rotating, so that the glue is prevented from flowing into the printing plate hole.

[0042] The fixed seat 4 is provided with a fixing tool, the upper end ring fixing tool comprises a pressing block 25 and a pressing screw 26, the top end and the bottom end of the pressing screw 26 are respectively screwed with the pressing block 25 and the fixed seat 4, the pressing block 25 holds the upper edge of the lower end ring, and then the pressing screw 26 is tightened to fix the lower end ring on the fixed seat 4.

[0043] Specifically, the opening and closing mechanism comprises a third servo motor 29, a sliding groove 30, a lead screw 31 and two opening and closing sliding blocks 32, the lead screw 31 is provided with reverse external threads on two sides, the two ends of the lead screw 31 are rotatably connected in the sliding groove 30, the two opening and closing sliding blocks 32 are respectively provided with screw holes, the two opening and closing sliding blocks 32 are respectively screwed with the two ends of the lead screw 31, and one end of the lead screw 31 penetrates out of the sliding groove 30 and is connected with the driving end of the third servo motor 29; the shaping arm 5 is provided with two, and the opening and closing sliding blocks 32 are respectively connected with the rear ends of the two shaping arms 5. The opening and closing mechanism drives the clamping arm 23 to relatively open and close, so that the shaping arms 5 are gripped and separated.

[0044] Work flow:

[0045] Preparation, support shaft 11 vertical state, fixed disc 12 is not installed in the vertical shaft, artificial installation of the lower end ring on the fixed seat 4, and the silk screen cylinder is placed on the shaping tool, the silk screen cylinder top is installed on the positioning tool, the silk screen is adhered with the connecting ring 28 by tape, the shaping arm 5 is located at the height of the adsorption point. The clamping arm 23 clamps the clamping ring 27 to lift the silk screen cylinder to the height above the lamp cylinder 36, and then falls on the lower fixed ring 37. The lower fixed ring 37 supports the bottom end of the silk screen cylinder, and then the clamping arm is opened. The rotating motor 40 drives the lower fixed ring 37 and the silk screen cylinder to rotate slowly, stops at the monitoring area, and the lamp cylinder 36 irradiates the silk screen cylinder. The detection camera 33 shoots the position to be checked and transmits to the display. The operator can observe the image on the display to improve the detection accuracy. If it is unqualified, it is stopped for processing; if it is qualified, the longitudinal linear slide 22 drives the clamping arm 23 to clamp the clamping ring 27 to rise until the bottom of the silk screen cylinder exceeds the top end of the support shaft 11, and then the horizontal linear slide 21 acts. The silk screen cylinder reaches above the fixed seat 4, and then the longitudinal linear slide 22 drives the silk screen cylinder to descend until the bottom end of the silk screen cylinder reaches the top of the guide ring of the lower end ring to stop. The shaping arm 5 embraces, the negative pressure source valve is opened, and the suction hole 7 sucks the outer wall of the silk screen cylinder. Then the positioning tool is manually removed. The lifting mechanism lowers the silk screen cylinder to the middle of the guide ring. At this time, the lower edge of the silk screen cylinder is very close to the support ring of the lower end ring. Through manual detection and judgment, whether there is serious deviation between the silk screen cylinder and the lower end ring is judged. If there is serious deviation, stop working and perform fault detection and discharge. If there is no serious deviation, the shaping arm 5 drives the silk screen cylinder to continue to descend until the support ring of the lower end ring is completely inserted into the silk screen cylinder. Then the shaping arm 5 is opened and rises to the top of the silk screen cylinder. The shaping arm 5 embraces and adsorbs the lower part of the top end adhesive part of the silk screen cylinder. Under the support of the shaping arm 5, the upper end ring is manually installed on the top end of the silk screen cylinder. The success rate of installing the upper end ring and the lower end ring is greatly improved.

[0046] Then, the fixed disc 12 is installed to fix the silk screen cylinder with the support shaft 11. Finally, the negative pressure in the shaping arm 5 is released and opened, so that the silk screen cylinder is not in contact with the shaping arm 5, preparing for rotary coating. The first servo motor 19 of the turnover driving mechanism is started to rotate the support arm 9 from vertical to horizontal, and the silk screen cylinder is also rotated to the horizontal position. The rotating motor 13 drives the support shaft 11 to rotate, and the silk screen cylinder also rotates. The operator holds a brush to coat the adhesive area on the outside. After coating, stop after 5-10 minutes, and stand still for 3-4 hours. Then the rotating motor 13 drives the support arm 9 to rotate back to the vertical position. The fixed disc 12 and the fixed tool are manually removed. The clamping arm 23 clamps the installation ring of the upper end ring to pull out the silk screen cylinder from the support shaft 11 and place it back on the forming device of the shaping station 22.

[0047] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A testing and assembly device for printing screens, characterized in that, The machine includes a frame (1), a forming device, an end ring mounting device, a mesh gluing device, a testing mechanism, and a transmission mechanism. The bottom of the frame (1) is arranged from left to right as a shaping station (2), a testing station (20), and an installation station (3). The forming device is located at the shaping station (2), the testing mechanism is located at the testing station (20), the end ring mounting device and the mesh gluing device are located at the installation station (3), and the transmission mechanism is located at the top of the frame (1) and transmits the cylindrical mesh tube between the shaping station (2), the testing station (20), and the installation station (3). The end ring mounting device includes a support mechanism, a lifting mechanism and a fixed seat (4). The fixed seat (4) is located at the bottom of the mounting station (3). The lifting mechanism is located above the fixed seat (4). The support mechanism includes multiple arc-shaped shaping arms (5) and an opening and closing mechanism. The opening and closing mechanism is fixed to the movable end of the lifting mechanism. The opening and closing mechanism drives the shaping arms (5) to open and close. After the shaping arms (5) are closed, they form a circle. The lifting mechanism drives the opening and closing mechanism to rise and fall. The forming device includes a guide platform (15) and a shaping platform (16). The guide platform (15) is conical, and the diameter of the shaping platform (16) matches the inner diameter of the wire mesh cylinder. The guide platform (15) is located at the top of the shaping platform (16), and the bottom of the guide platform (15) is transitionally connected to the shaping platform (16). The wire mesh gluing device includes a support arm (9), a support (10), a flipping drive mechanism, a support shaft (11), a fixed plate (12), and a rotary motor (13). The lifting mechanism includes a lifting linear slide and a mounting base (18). The lifting linear slide is fixed on the support arm (9), and the slider of the lifting linear slide is fixedly connected to the rear side of the mounting base (18). The front side of the mounting base (18) is fixedly connected to the opening and closing mechanism. During the movement, the slider of the lifting mechanism drives the shaping arm (5) to move. There are four working stops: the upper ring mounting point, the adsorption point, the confirmation stop point and the push stop point. The upper ring mounting point is the height of the top of the wire mesh, the adsorption point is the height of the upper edge near the wire mesh bonding part, the confirmation stop point is the height of the bottom of the wire mesh reaching the middle of the guide ring, and the push stop point is the height of the bottom of the wire mesh reaching the bottom of the mounting ring. The fixed seat (4) is provided with a fixing fixture, which includes a pressure block (25) and a clamping screw (26). The top and bottom ends of the clamping screw (26) are respectively screwed to the pressure block (25) and the fixed seat (4).

2. The inspection and assembly equipment for printing screens according to claim 1, characterized in that, It is also provided with an air passage (6), a suction hole (7), a ventilation pipe (8) and a negative pressure source. The air passage (6) is located inside the shaping arm (5). The inner side wall of the shaping arm (5) is uniformly provided with suction holes (7). The suction holes (7) connect the air passage (6) and the outside. The negative pressure source is provided with a controllable valve. The ventilation pipe (8) connects the air passage (6) and the valve of the negative pressure source.

3. The inspection and assembly equipment for printing screens according to claim 2, characterized in that, The support (10) is fixed on the bracket. The support (10) has a shaft hole. The flipping drive mechanism is connected to the top of the support arm (9). The flipping drive mechanism drives the support arm (9) to flip. The fixed plate (12) is detachably connected to the support shaft (11). The edge of the fixed plate (12) is provided with a clamp. The clamp fixes the upper ring to the fixed plate (12). The lifting mechanism is fixed on the support arm (9). The support arm (9) is L-shaped. The rotary motor (13) is installed at the bottom of the support arm (9). The rotary motor (13) drives the support shaft (11) to rotate. The fixed seat (4) is fixed at the bottom of the support shaft (11). The rotary motor (13) drives the support shaft (11) and the fixed seat (4) to rotate.

4. The inspection and assembly equipment for printing screens according to claim 3, characterized in that, The flipping drive mechanism includes a first servo motor (19) and a reducer. The power output end of the reducer is connected to the back of the support arm (9). The transmission mechanism includes a transverse linear slide (21), a longitudinal linear slide (22), a clamping arm (23), and two second servo motors. The transverse linear slide (21) drives the longitudinal linear slide (22) to move laterally. The clamping arm (23) is fixed to the slider of the longitudinal linear slide (22). The second servo motors drive the transverse linear slide (21) and the longitudinal linear slide (22) to move respectively.

5. The inspection and assembly equipment for printing screens according to claim 4, characterized in that, The device is also provided with a positioning fixture, which includes a clamping ring (27) and a connecting ring (28). The diameter of the clamping ring (27) is larger than the diameter of the connecting ring (28). The outer diameter of the connecting ring (28) matches the inner diameter of the wire mesh tube. The clamping ring (27) and the connecting ring (28) are integrally formed. The opening and closing mechanism includes a third servo motor (29), a slide groove (30), a lead screw (31), and two opening and closing sliders (32). The lead screw (31) has reverse external threads on both sides, and the two ends of the lead screw (31) are rotatably connected in the slide groove (30). The two opening and closing sliders (32) are respectively provided with screw holes, and the two opening and closing sliders (32) are respectively screwed to the two ends of the lead screw (31). One end of the lead screw (31) passes through the slide groove (30) and is connected to the drive end of the third servo motor (29). There are two shaping arms (5), and the opening and closing sliders (32) are respectively connected to the rear ends of the two shaping arms (5).

6. The inspection and assembly equipment for printing screens according to claim 5, characterized in that, The detection mechanism includes a lamp tube (36), a support rotation mechanism and a scanning mechanism. The scanning mechanism includes a detection camera (33), a camera bracket (34), a detection linear slide rail (35) and a display. The detection camera (33) is mounted on the detection linear slide rail (35) through the camera bracket (34), and the detection camera (33) is electrically connected to the display.

7. The inspection and assembly equipment for printing screens according to claim 6, characterized in that, The supporting rotation mechanism includes a lower fixed ring (37), a sleeve (38), a fixed shaft (39), a rotary motor (40), a rotary support (41), and a fixed bracket (42). The lower fixed ring (37) supports the wire mesh. The sleeve (38) is connected to the lower fixed ring (37) through the fixed bracket (42). The fixed shaft (39) passes through the sleeve (38). The bottom of the fixed shaft (39) is fixed on the bracket. The fixed shaft (39) and the sleeve (38) are connected through the rotary support (41). The rotary motor (40) drives the sleeve (38) to rotate. The power cord of the lamp tube (36) passes through the fixed shaft (39) and is connected to an external power source.

8. The inspection and assembly equipment for printing screens according to claim 7, characterized in that, It is also equipped with a protective cover (43), which is a hollow cylindrical tube made of acrylic material. The lamp tube (36) is located inside the hollow cylindrical tube made of acrylic material and faces the scanning mechanism.

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