Vacuum adsorption device for polyurethane film demolding

By designing a polyurethane film release device with vacuum adsorption roller and gantry system, the problem of damage and wrinkles of the film during the release process is solved, and the film is flat curled and spread, which improves production efficiency.

CN222681487UActive Publication Date: 2025-03-28JIANGSU HONGYUAN NEW MATERIAL TECH
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Patent Information

Application Number
CN202420754079.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-12
Publication Date
2025-03-28
Estimated Expiration
2034-04-12

AI Technical Summary

Technical Problem

During the release of polyurethane films, the prior art is difficult to avoid film breakage and wrinkles, especially in large-scale production. Automatic removal systems may cause wrinkles of the film during adsorption and transport, requiring additional equipment to be leveled.

Method used

A vacuum adsorption device for demolding of polyurethane films is designed, using a vacuum adsorption roller and a gantry system. Through the rotation of the vacuum adsorption roller and the movement of the gantry, the film is curled and its flatness is adjusted. The front and rear sections of the film are sorted with cylinders and adjustment rods to ensure that the film is free of damage and wrinkles during the demolding process.

Benefits of technology

The damage-free and wrinkle-free polyurethane film during the mold release process is achieved, ensuring the flat spread of the film at the next station, improving production efficiency and reducing the need for additional leveling devices.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a vacuum adsorption device for demoulding a polyurethane film. The vacuum adsorption device comprises a workbench and a portal frame, the portal frame is arranged on the workbench through a pair of sliding rails and can move from a demolding station to a spreading station. The portal frame comprises a pair of stand columns, a cross beam and a vacuum adsorption roller, the cross beam is arranged between the stand columns and can ascend and descend, a pair of installation columns are arranged below the cross beam, the vacuum adsorption roller is arranged between the installation columns and can rotate, one end of the vacuum adsorption roller is connected with the vacuum pump assembly, and the other end of the vacuum adsorption roller is provided with a driving motor. According to the utility model, the vacuum adsorption roller is adopted to adsorb and curl the polyurethane film, so that the vacuum adsorption roller not only has the advantage of uniform stress in vacuum adsorption, but also has the characteristic of flat film in the curling process, so that the polyurethane film is not damaged or wrinkled in the demolding process, and finally can be flatly placed and spread at the next station.
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Description

Technical Field

[0001] The utility model relates to the technical field of film demoulding, in particular to a vacuum adsorption device for polyurethane film demoulding. Background Art

[0002] In the process of preparing polyurethane film, polytetrafluoroethylene molds are often used for curing, and the cured film needs to be taken out and sent to the subsequent process. In small-scale production or laboratory environments, due to the small output and higher requirements for precision, the film will be taken out manually so that the film can be handled more carefully to avoid damage. In large-scale production, in order to improve production efficiency and reduce labor costs, an automated removal system will be used. Some of these systems use robotic arms and conveyor belts to complete the removal and transportation of the film, and some use other automated devices to quickly remove the cured polyurethane film. The automated removal system can greatly improve production efficiency and reduce damage and errors caused by human factors.

[0003] When the film is grabbed by a robot arm, the grabbing position and grabbing force of the robot arm are extremely high. If the film is grabbed at the edge or fragile part or the grabbing force is uneven, the film may be damaged. It may also cause the film to curl and wrinkle when it is transported by a conveyor belt. The existing technology also uses vacuum adsorption technology to remove the film, and evenly distributed adsorption points are set to ensure that the film is evenly stressed. After adsorption, the film is moved up to remove it, and then moved to the conveyor belt or to the support surface of the next station and slowly released. Compared with the robot arm film removal, the existing technology has more uniform force and is not easy to damage the film. The disadvantage is that the film is still prone to wrinkles during adsorption and transmission. After being placed in the next station, an additional device is required to flatten the film.

[0004] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0005] The utility model provides a vacuum adsorption device for demoulding a polyurethane film, which is used to solve the above problems.

[0006] A technical solution adopted by the utility model is: to provide a vacuum adsorption device for demoulding a polyurethane film, comprising: a workbench and a gantry;

[0007] The gantry is arranged on a workbench through a pair of slide rails and can be moved from the demoulding station to the spreading station;

[0008] The gantry comprises a pair of columns, a crossbeam and a vacuum adsorption roller. The crossbeam is arranged between the columns and can be raised and lowered. A pair of mounting columns are arranged below the crossbeam. The vacuum adsorption roller is arranged between the mounting columns and can rotate. One end of the vacuum adsorption roller is connected to the vacuum pump assembly and the other end is provided with a driving motor.

[0009] During demoulding, the crossbeam descends to allow the vacuum adsorption roller to adsorb the polyurethane film in contact. Subsequently, the gantry moves and the vacuum adsorption roller rotates to curl the polyurethane film onto the roller surface. The adsorption force is adjusted by adjusting the power of the vacuum pump. The film is curled evenly onto the roller surface by adjusting the moving speed of the gantry and the rotation speed of the roller.

[0010] During spreading, the crossbeam descends to make the roller surface touch the next workstation. Then, the gantry moves and the vacuum adsorption roller rotates to spread the polyurethane film on the workbench surface.

[0011] Furthermore, a pair of cylinders and an adjusting rod are provided below the crossbeam, a mounting seat is provided at the driving end of each cylinder, and the adjusting rod is rotatably provided between the mounting seats;

[0012] During demoulding, the head and tail parts of the polyurethane film need to be adjusted by the adjusting rod. The cylinder driving end extends to press the adjusting rod on the roller surface. The vacuum adsorption roller rotates or rotates while coordinating with the movement of the gantry to make the head and tail parts of the polyurethane film fit the roller surface.

[0013] Furthermore, the cylinder is also provided with a pressure sensor to directly or indirectly monitor the force applied to the adjusting rod, so as to stop in time after the adjusting rod presses the film.

[0014] Furthermore, the vacuum pump assembly includes a vacuum pump and a connecting pipe, a support plate is provided at the bottom of each mounting column, the vacuum pump is provided on the support plate, one end of the connecting pipe is connected to the output end of the vacuum pump, and the other end is connected to the end of the vacuum adsorption roller through a rotary joint;

[0015] During demoulding, the vacuum roller rotates and the connecting tube remains stationary.

[0016] Furthermore, the driving motor is arranged on a supporting plate at the bottom of another mounting column.

[0017] Furthermore, a pair of L-shaped connectors are provided below the crossbeam, one end of the L-shaped connector is connected to the crossbeam, and the other end is connected to the support plate, so as to strengthen the support structure.

[0018] Furthermore, sensing devices are provided on both the front and rear sides of the crossbeam for determining the front and rear positions of the mold to ensure that the roller surface accurately contacts the polyurethane film and is detached in time.

[0019] The beneficial effects of the vacuum adsorption device for demoulding a polyurethane film of the utility model are:

[0020] 1. The vacuum adsorption roller is used to adsorb and curl the polyurethane film, which has the advantages of uniform vacuum adsorption force and the characteristic of flattening the film during curling, so that the polyurethane film is not damaged or wrinkled during the demoulding process, and can finally be placed and spread flatly on the next station. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a vacuum adsorption device for demoulding a polyurethane film before demoulding according to the first embodiment of the utility model;

[0022] Figure 2 This is a front view of a vacuum adsorption device for demoulding a polyurethane film in the first embodiment of the utility model during demoulding;

[0023] Figure 3 It is a front view of a vacuum adsorption device for demoulding a polyurethane film in the first embodiment of the utility model, which is adjusted during demoulding;

[0024] Figure 4 It is a top view of the first embodiment of the utility model during demoulding;

[0025] Figure 5 is a top view of the first embodiment of the utility model when it is spread out;

[0026] Figure 6 This is a schematic diagram of the front section adjustment in the first embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of the rear section adjustment in the first embodiment of the utility model;

[0028] The components in the accompanying drawings are marked as follows: 1. workbench, 2. column, 3. beam, 4. vacuum adsorption roller, 5. vacuum pump assembly, 6. drive motor, 7. adjustment rod, 8. mold, 9. polyurethane film, 11. slide rail, 31. mounting column, 32. cylinder, 33. L-shaped connector, 51. vacuum pump, 52. connecting pipe. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] See also Figures 1 to 5, the first embodiment of the utility model provides a vacuum adsorption device for demoulding a polyurethane film 9, comprising: a workbench 1 and a gantry;

[0032] The workbench 1 has two stations, a demoulding station for placing the polytetrafluoroethylene mold 8, and a spreading station for spreading the film and reprocessing it;

[0033] The gantry is arranged on the workbench 1 through a pair of slide rails 11, and the slide rails 11 are located on both sides of the workstations, so that the gantry can be moved from one end of the workbench 1 to the other end, and from the demoulding station to the spreading station;

[0034] The gantry includes a pair of columns 2, a crossbeam 3 and a vacuum adsorption roller 4. The columns 2 are arranged on corresponding slide rails 11 and are movable. The crossbeam 3 is arranged between the columns 2 and can be raised and lowered. A pair of mounting columns 31 are arranged below the columns. The vacuum adsorption roller 4 is arranged between the mounting columns 31 and can be raised and lowered with the crossbeam 3. The two ends of the vacuum adsorption roller 4 are rotatably connected to the mounting columns 31 so that the roller can rotate. The end of the vacuum adsorption roller 4 extends outward, one end is connected to the vacuum pump assembly 5, and the other end is provided with a driving motor 6.

[0035] During demoulding, the crossbeam 3 descends to allow the vacuum adsorption roller 4 to adsorb the polyurethane film 9 in contact, and then the gantry moves and the vacuum adsorption roller 4 rotates to roll the polyurethane film 9 onto the roller surface. The adsorption force is adjusted by adjusting the power of the vacuum pump, and the film is smoothly rolled onto the roller surface by adjusting the moving speed of the gantry and the rotation speed of the roller. After the winding is completed, the crossbeam 3 moves upward, and the gantry moves to the other end of the workbench 1 to reach the spreading station.

[0036] During spreading, the crossbeam 3 descends to make the roller surface touch the starting position of the next station, and then the gantry moves and the vacuum adsorption roller 4 rotates to spread the polyurethane film 9 on the surface of the workbench 1. After the spreading is completed, the crossbeam 3 moves up and the gantry is reset to enter the next demoulding.

[0037] Specifically, during demoulding, the rotation speed of the vacuum adsorption roller 4 will be slightly greater than its natural rolling speed, so as to maintain a certain tension, which will not damage the film and can make it curl smoothly onto the roller surface.

[0038] The vacuum pump assembly 5 includes a vacuum pump 51 and a connecting pipe 52. A supporting plate is provided at the bottom of each mounting column 31. The vacuum pump 51 is provided on the supporting plate on the left side. One end of the connecting pipe 52 is connected to the output end of the vacuum pump 51, and the other end is connected to the end of the vacuum adsorption roller 4 through a rotating joint. When demoulding, the vacuum adsorption roller 4 rotates, and the connecting pipe 52 remains stationary to avoid the connecting pipe 52 from twisting and breaking during the working process.

[0039] The driving motor 6 is arranged on the right supporting plate and is used for driving the vacuum adsorption roller 4 to rotate.

[0040] Specifically, a pair of L-shaped connectors 33 are further provided below the cross beam 3 , the upper ends of the L-shaped connectors 33 are connected to the cross beam 3 , and the lower ends are connected to one side support plate, so as to strengthen the support structure.

[0041] When the vacuum adsorption roller 4 is rolling up the polyurethane film 9, it has a suitable adsorption force on the inner film to ensure that the inner layer is attached to the roller surface. At the end of the rolling, the outer film needs an additional structure to be pressed against the roller surface to prevent the film from loosening and wrinkling when the vacuum adsorption roller 4 moves upward:

[0042] A pair of cylinders 32 and an adjusting rod 7 are also provided below the crossbeam 3. A mounting seat is provided at the driving end of each cylinder 32. The adjusting rod 7 is arranged between the mounting seats and can rotate. Under the drive of the cylinder 32, the adjusting rod 7 can be raised and lowered.

[0043] At the end of winding, the cylinder 32 drives the adjusting rod 7 to descend and press on the surface of the wound film to prevent the film from unravelling during the movement.

[0044] Specifically, the cylinder 32 is also provided with a pressure sensor so as to stop in time after the adjusting rod 7 presses the film.

[0045] During the process of vacuum adsorption roller 4 rolling up polyurethane film 9, due to the limitation of the structure of mold 8, there is a small distance between the front section and the rear section of the film that cannot be directly attached to the roller surface during adsorption, and some adjustments are required:

[0046] (1) Adjusting and finishing the front section of the polyurethane film 9

[0047] See also Figure 6 , the vacuum adsorption roller 4 adsorbs the film and rewinds it half a circle, at which time the front section of the film does not contact the roller surface;

[0048] The cylinder 32 drives the adjusting rod 7 to descend to make it contact the film, after which the gantry moves back and the vacuum adsorption roller 4 reverses a distance, so that the front section is attached to the roller surface, thus achieving the adjustment and finishing of the front section;

[0049] After that, rewind as normal.

[0050] (2) Adjusting and finishing the rear section of the polyurethane film 9

[0051] See also Figure 7 , the vacuum adsorption roller 4 is rolled up to the end of the mold 8, at which time the rear section of the film does not contact the roller surface;

[0052] The cylinder 32 drives the adjusting rod 7 to descend to make it contact the film, after which the crossbeam 3 rises and the vacuum adsorption roller 4 continues to rotate. Under the action of the adjusting rod 7, the rear section will also be attached to the roller surface, thus achieving the adjustment and finishing of the rear section.

[0053] Afterwards, go to the spreading station to start.

[0054] Since the mold 8 has different length and width specifications, the vacuum adsorption roller 4 will also adopt different specifications to adapt to demoulding. Therefore, the vacuum adsorption roller 4 is detachable. At the same time, in order to ensure that the vacuum adsorption roller 4 can accurately enter and exit the mold 8, there are also the following designs:

[0055] Sensing devices are provided on both the front and rear sides of the crossbeam 3 to determine the front and rear positions of the mold 8;

[0056] The vacuum adsorption device has a controller to control the movement of the gantry, the lifting of the beam 3, the drive of the cylinder 32, the start and stop of the vacuum and the motor, and is also electrically connected to the induction device and the sensor to coordinate the actions of the various structures of the device.

[0057] The beneficial effects of the vacuum adsorption device for demoulding a polyurethane film of the utility model are:

[0058] 1. The vacuum adsorption roller is used to adsorb and curl the polyurethane film, which has the advantages of uniform vacuum adsorption force and the characteristic of flattening the film during curling, so that the polyurethane film is not damaged or wrinkled during the demoulding process, and can finally be placed and spread flatly on the next station;

[0059] 2. The outer film is pressed by setting a lifting adjustment rod, and the front and rear sections of the film are adjusted and arranged in cooperation with the crossbeam and vacuum adsorption roller, so that the polyurethane film can fit the roller surface throughout the whole process;

[0060] 3. The setting of the sensing device enables the vacuum adsorption roller to enter and exit the mold safely, and the setting of the sensor enables the adjustment rod to press the film with appropriate force.

[0061] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vacuum adsorption device for demoulding a polyurethane film, characterized in that: include: Work tables and gantries; The gantry is arranged on a workbench through a pair of slide rails and can be moved from the demoulding station to the spreading station; The gantry includes a pair of columns, a crossbeam and a vacuum adsorption roller. The crossbeam is arranged between the columns and can be raised and lowered. A pair of mounting columns are arranged below the crossbeam. The vacuum adsorption roller is arranged between the mounting columns and can be rotated. One end of the vacuum adsorption roller is connected to the vacuum pump assembly, and the other end is provided with a driving motor.

2. A vacuum adsorption device for demoulding a polyurethane film according to claim 1, characterized in that: A pair of cylinders and an adjusting rod are also arranged below the crossbeam, and a mounting seat is arranged at the driving end of each cylinder, and the adjusting rod is arranged between the mounting seats and can rotate.

3. A vacuum adsorption device for demoulding a polyurethane film according to claim 2, characterized in that: The cylinder is also provided with a pressure sensor.

4. A vacuum adsorption device for demoulding a polyurethane film according to any one of claims 1 to 3, characterized in that: The vacuum pump assembly includes a vacuum pump and a connecting pipe. A support plate is provided at the bottom of each mounting column. The vacuum pump is provided on the support plate. One end of the connecting pipe is connected to the output end of the vacuum pump, and the other end is connected to the end of the vacuum adsorption roller through a rotating joint.

5. A vacuum adsorption device for demoulding a polyurethane film according to claim 4, characterized in that: The driving motor is arranged on a supporting plate at the bottom of another mounting column.

6. A vacuum adsorption device for demoulding a polyurethane film according to claim 5, characterized in that: A pair of L-shaped connectors are also provided below the cross beam, one end of the L-shaped connector is connected to the cross beam, and the other end is connected to the support plate.

7. A vacuum adsorption device for demoulding a polyurethane film according to any one of claims 1 to 3, characterized in that: The front and rear sides of the crossbeam are both provided with sensing devices.

8. A vacuum adsorption device for demoulding a polyurethane film according to claim 7, characterized in that: The vacuum pump assembly includes a vacuum pump and a connecting pipe. A support plate is provided at the bottom of each mounting column. The vacuum pump is provided on the support plate. One end of the connecting pipe is connected to the output end of the vacuum pump, and the other end is connected to the end of the vacuum adsorption roller through a rotating joint.

9. A vacuum adsorption device for demoulding a polyurethane film according to claim 8, characterized in that: The driving motor is arranged on a supporting plate at the bottom of another mounting column.

10. A vacuum adsorption device for demoulding a polyurethane film according to claim 9, characterized in that: A pair of L-shaped connectors are also provided below the cross beam, one end of the L-shaped connector is connected to the cross beam, and the other end is connected to the support plate.