CN117326168A

CN117326168A - Dyestripping equipment

Info

Publication number: CN117326168A
Application number: CN202311527275.6A
Authority: CN
Inventors: 王建勋; 张成宣; 程恒龙; 陈安中; 殷春强
Original assignee: Dongguan Siwo Intelligent Equipment Co ltd
Current assignee: Dongguan Siwo Intelligent Equipment Co ltd
Priority date: 2023-11-15
Filing date: 2023-11-15
Publication date: 2024-01-02

Abstract

The invention relates to the technical field of plate processing, and discloses a film tearing device, which comprises: the feeding plate conveying mechanism is used for conveying the workpiece along a preset direction; the rubbing wheel pressing plate structure comprises a first clamping component used for clamping one end of a workpiece and a rubbing wheel component used for rubbing one end of a coating film on the workpiece; the film lifting device comprises a second clamping component for clamping one end of the workpiece, a film lifting component for sticking one end of the rubbed film and a film grabbing and removing mechanism for grabbing and removing the stuck film; the rubbing wheel pressing plate structure and the film lifting device are arranged at intervals along a preset direction. The film tearing equipment can effectively improve the film tearing efficiency of the platy workpiece.

Description

Dyestripping equipment

Technical Field

The invention relates to the technical field of plate processing, in particular to a film tearing device.

Background

At present, the processed PCB semi-finished product is generally covered on the upper surface and the lower surface by two layers of coating films respectively, so that the upper surface and the lower surface of the PCB are protected, and when the PCB semi-finished product is required to be further processed, the coating films on the upper surface and the lower surface of the PCB are removed. However, the current implementation of tearing off the coating is generally performed manually, specifically, a doctor blade is used to lift one edge of the coating, and then the coating is torn off by a human hand. The method is low in efficiency and high in labor cost, and the surface of the PCB is easily scratched and/or the coating is easily scratched when a scraper is used for lifting one edge of the coating, so that the production progress is greatly influenced.

In view of this, designing a film tearing apparatus to efficiently remove the envelope covering the PCB board is an urgent problem to be solved.

Disclosure of Invention

The invention aims to provide a film tearing device for efficiently removing a film covering a PCB (printed circuit board) to solve the problem.

To achieve the purpose, the invention adopts the following technical scheme:

a film tearing apparatus comprising:

the feeding plate conveying mechanism is used for conveying the workpiece along a preset direction;

the rubbing wheel pressing plate structure comprises a first clamping component used for clamping one end of a workpiece and a rubbing wheel component used for rubbing one end of a coating film on the workpiece;

the film lifting device comprises a second clamping component for clamping one end of the workpiece, a film lifting component for sticking one end of the rubbed film and a film grabbing and removing mechanism for grabbing and removing the stuck film;

the rubbing wheel pressing plate structure and the film lifting device are arranged at intervals along a preset direction.

Optionally, the first clamping assembly comprises a first clamping block, a first lifting device, a second clamping block and a second lifting device;

the first clamping block and the second clamping block are oppositely arranged, and the first lifting device is arranged on one side of the top of the workpiece and is used for driving the first clamping block to be close to or far away from the second clamping block; the second lifting device is arranged on one side of the bottom of the workpiece and used for driving the second clamping block to be close to or far away from the first clamping block.

Optionally, the rubbing wheel assembly comprises a first rubbing wheel, a third lifting device, a second rubbing wheel, a fourth lifting device and a linear module for driving the third lifting device and the fourth lifting device to move along a preset second direction;

the first rubbing wheel and the second rubbing wheel are oppositely arranged, and the third lifting device is arranged on one side of the top of the workpiece and is used for driving the first rubbing wheel to be close to or far away from the second rubbing wheel; the fourth lifting device is arranged on one side of the bottom of the workpiece and used for driving the second rubbing wheel to be close to or far away from the first rubbing wheel.

Optionally, the film lifting assembly comprises an adhesive tape unreeling device, an adhesive tape reeling device and a telescopic device arranged between the adhesive tape unreeling device and the adhesive tape reeling device, wherein the telescopic device is used for ejecting the adhesive tape to adhere the rubbed film.

Optionally, the film tearing assembly further comprises a plurality of transfer rollers;

the telescopic shaft of the telescopic device is provided with a fixed shaft, the fixed shaft is rotatably provided with a pressing block, the membrane lifting assembly also comprises an adjusting cylinder, the pressing block is fixedly connected with at least one transfer roller, and a gap for the adhesive tape to pass through is formed between the pressing block and the transfer roller fixedly connected to the pressing block;

the adjusting cylinder is fixedly connected with a telescopic shaft of the telescopic device and is used for driving the pressing block to rotate around the fixed shaft; when the coating is required to be adsorbed, the adjusting cylinder drives the pressing block to rotate so that the pressing surface of the pressing block faces the adhesive tape, and the telescopic device drives the pressing block and the adjusting cylinder to synchronously move downwards so that the pressing surface drives the adhesive tape to be pressed and stuck on the coating; before the film grabbing and removing mechanism grabs the film, the telescopic device drives the pressing block and the adjusting cylinder to move upwards synchronously so as to glue one end of the film, the adjusting cylinder drives the pressing block to rotate around the fixed shaft so that the pressing block is in an inclined state, and the glued end of the film is tilted upwards along with deformation of the adhesive tape so as to facilitate the film grabbing and removing mechanism to grab the film.

Optionally, the film grabbing and removing mechanism comprises a film tearing manipulator and a translation driving device for driving the film tearing manipulator to translate; the film tearing manipulator is provided with a gripper for gripping the film adsorbed by the film lifting assembly;

after the coating is grasped by the grippers, the translation driving device drives the film tearing manipulator to move in a direction away from the film lifting assembly.

Optionally, the feeding plate conveying mechanism comprises a frame, a front conveying section arranged on the frame, a middle conveying section arranged on the frame, and a rear conveying section arranged on the frame, wherein the front conveying section, the middle conveying section and the rear conveying section are sequentially arranged;

the rubbing wheel pressing plate structure is arranged between the front conveying section and the middle conveying section, and the second clamping assembly is arranged between the middle conveying section and the rear conveying section.

Optionally, the film tearing device further comprises a detection device which is arranged at the rear end of the second clamping component and used for detecting whether a film remains on the workpiece;

the detection device comprises a plurality of visual detection units which are arranged in a arrayed mode.

Optionally, the film tearing apparatus further comprises film collection means for collecting the film removed by the film grabbing removal mechanism;

the film collecting device comprises a blowing unit arranged at one side of the film lifting device and a film collecting box for receiving the envelope blown by the blowing unit; the opening of the film collecting box faces the blowing unit;

the film grabbing and removing mechanism at one side of the bottom of the workpiece further comprises blanking rings, the two blanking rings are respectively arranged at two sides of the grippers, and the film is guided to fall off when the grippers descend so as to be prevented from being hung on the grippers.

Optionally, the gripper comprises a fixed jaw, an opening and closing clamping jaw and a clamping cylinder for driving the opening and closing clamping jaw to be close to or far away from the fixed jaw;

the opening and closing clamping jaw is rotatably arranged on the fixed jaw, and is provided with an L-shaped clamping part which is used for being attached to the clamping part of the fixed jaw.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, through the plate feeding conveying mechanism, the washboard pressing plate structure and the film lifting device, a film tearing station for coating films on a workpiece can be automatically completed, the working efficiency of film tearing is effectively improved, and the films coated on the plate-shaped workpiece can be efficiently removed.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the invention, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

Fig. 1 is a schematic perspective view of a film tearing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic side view of a film tearing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a film tearing apparatus according to another embodiment of the present invention;

FIG. 4 is a schematic side view of a structure of a pinch roller press according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a rubbing wheel pressing plate structure according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a structure of a rubbing wheel press according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a lifting membrane assembly according to an embodiment of the present invention;

FIG. 8 is an enlarged schematic view of the position A of FIG. 7;

FIG. 9 is a schematic perspective view of a second clamping assembly according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of a film grabbing and removing mechanism according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of a film grabbing mechanism according to an embodiment of the present invention;

fig. 12 is a schematic perspective view of a detection device according to an embodiment of the present invention;

fig. 13 is a schematic diagram of an installation structure of a blower unit according to an embodiment of the present invention.

Illustration of: 1. a feeding plate conveying mechanism; 11. a front conveying section; 12. a middle conveying section; 13. a rear conveying section; 2. a rubbing wheel pressing plate structure; 21. a first clamping assembly; 211. a first clamping block; 212. a first lifting device; 213. a second clamping block; 214. a second lifting device; 22. a rubbing wheel assembly; 221. a first rubbing wheel; 222. a third lifting device; 223. a second rubbing wheel; 224. a fourth lifting device; 225. a linear module; 3. a film lifting device; 31. a second clamping assembly; 32. a membrane lifting assembly; 321. an adhesive tape unreeling device; 322. a tape winding device; 323. a telescoping device; 324. a transfer roller; 325. briquetting; 326. adjusting a cylinder; 33. a film grasping removal mechanism; 331. a film tearing manipulator; 332. a translation driving device; 333. a gripper; 3331. a fixed claw; 3332. opening and closing the clamping jaw; 3334. a clamping cylinder; 3201. a gap; 301. a blanking ring; 4. a detection device; 5. and a blowing unit.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

The embodiment of the invention provides a film tearing device which can efficiently overflow a film covered on a PCB.

Referring to fig. 1 to 13, the film tearing apparatus includes: the feeding plate conveying mechanism 1 is used for conveying the workpiece along a preset direction; the rubbing wheel pressing structure 2 comprises a first clamping component 21 used for clamping one end of a workpiece and a rubbing wheel component 22 used for rubbing one end of a coating film on the workpiece; the film lifting device 3 comprises a second clamping assembly 31 for clamping one end of a workpiece, a film lifting assembly 32 for sticking one end of the rubbed film and a film grabbing and removing mechanism 33 for grabbing and removing the stuck film; the rubbing wheel pressing plate structure 2 and the film lifting device 3 are arranged at intervals along a preset direction.

Specifically, when the workpiece is conveyed on the plate feeding conveying mechanism 1 along a preset direction and conveyed to the washboard station, the first clamping component 21 clamps one end of the workpiece and does not clamp the coating film on the workpiece, and the rubbing wheel component 22 loosens the end of the coating film on the workpiece; the workpiece continues to move in the preset direction to the film lifting station, the second clamping assembly 31 clamps one end of the workpiece and does not clamp the end of the film which is rubbed off, the film lifting assembly 32 sucks the end of the film which is rubbed off and rises to pull up the end of the film which is rubbed off, and the film grabbing removing mechanism 33 grabs the end of the film which is pulled up and removes the film. Wherein the film grasping removal mechanism 33 is movable in a direction opposite to the preset direction to remove the envelope and separate the envelope from the workpiece.

In the embodiment, through the mechanical structure, the purpose of automatically removing the coating can be achieved, and the coating on the PCB can be removed efficiently. Here, the envelope is also called a protective film.

Optionally the first clamping assembly 21 comprises a first clamping block 211, a first lifting device 212, a second clamping block 213 and a second lifting device 214; the first clamping block 211 and the second clamping block 213 are oppositely arranged, and the first lifting device 212 is arranged on one side of the top of the workpiece and is used for driving the first clamping block 211 to be close to or far from the second clamping block 213; the second lifting device 214 is disposed at one side of the bottom of the workpiece, and is used for driving the second clamping block 213 to approach or separate from the first clamping block 211.

Specifically, the first lifting device 212 drives the first clamping block 211 to descend, and the second lifting device 214 drives the second clamping block 213 to ascend, so as to clamp the end of the workpiece.

In particular, in this embodiment, an automatic copper retaining stopper mechanism 23 for automatically stopping the workpiece is provided so that the workpiece can be accurately stopped at the washboard station. The automatic copper retaining stop block mechanism 23 comprises a support baffle 234, and a plurality of stop blocks 233 for stopping the copper plate are arranged on the support baffle 234 at intervals; the automatic copper retaining stop block mechanism 23 further comprises a stop lifting cylinder 231 for driving the supporting baffle plate 23 to lift and a stop translation cylinder 232 for driving the stop lifting cylinder 231 to horizontally move. It should be further noted that the copper-retaining widths on the workpieces of different customers are different, and in this embodiment, the position of the copper-retaining width can be adjusted by stopping the translation cylinder 232, so as to adapt to the requirements of different copper-retaining widths, so that the rubbing wheel assembly 22 can accurately rub the end of the coating film. It should be noted that, after the film rubbing process is completed, the stop lifting cylinder 231 may drive the stop block 233 and the supporting baffle 234 to descend, so that the copper plate, the circuit board or other plate-shaped workpiece flows to the next process after undergoing the film rubbing process. The copper-leaving width herein refers to the width from the edge of the envelope to the edge of the copper plate.

Optionally, the rubbing wheel assembly 22 includes a first rubbing wheel 221, a third lifting device 222, a second rubbing wheel 223, a fourth lifting device 224, and a linear module 225 for driving the third lifting device 222 and the fourth lifting device 224 to move along a preset second direction; the first rubbing wheel 221 and the second rubbing wheel 223 are oppositely arranged, and the third lifting device 222 is arranged on one side of the top of the workpiece and is used for driving the first rubbing wheel 221 to be close to or far from the second rubbing wheel 223; the fourth lifting device 224 is disposed at one side of the bottom of the workpiece, and is used for driving the second rubbing wheel 223 to approach or separate from the first rubbing wheel 221.

Specifically, the third lifting device 222 drives the first rubbing wheel 221 to descend so that the first rubbing wheel 221 abuts against the end of the coating film of the workpiece, the fourth lifting device 224 drives the second rubbing wheel 223 to abut against the end of the coating film of the bottom surface of the workpiece, and then the linear module 225 drives the first rubbing wheel 221 and the second rubbing wheel 223 to synchronously move transversely, so that the end of the coating film is loosened, and the film lifting assembly 32 is convenient to adhere the end of the coating film.

During the friction and movement of the rubbing wheel 221 and the envelope, the end of the envelope, the surface of the workpiece, or both are separated to reduce the attractive force therebetween, referred to as rubbing loose.

Optionally, the film lifting assembly 32 includes a tape unreeling device 321, a tape reeling device 322, and a telescopic device 323 disposed between the tape unreeling device 321 and the tape reeling device 322, wherein the telescopic device 323 is used for ejecting the tape to adhere the film which is loosened.

Specifically, the telescopic device 323 is used for pushing the adhesive tape to move, so that the adhesive tape can be stuck to the adhesive tape, and one end of the coating can be lifted when the telescopic shaft of the telescopic device is lifted. It should be further noted that the tape unreeling device 321 and the tape reeling device 322 are matched with each other, so as to tighten the tape to a certain extent, and avoid the tape from being too loose.

Optionally, the film tearing assembly further includes a plurality of transfer rollers 324; the telescopic shaft of the telescopic device 323 is provided with a fixed shaft, the fixed shaft is rotatably provided with a pressing block 325, the film lifting assembly 32 further comprises an adjusting cylinder 326, the pressing block 325 is fixedly connected with at least one transfer roller 324, and a gap 3201 for the adhesive tape to pass through is formed between the pressing block 325 and the transfer roller 324 fixedly connected to the pressing block 325.

The adjusting cylinder 326 is fixedly connected with a telescopic shaft of the telescopic device 323 and is used for driving the pressing block 325 to rotate around a fixed shaft; when the coating is required to be adsorbed, the adjusting cylinder 326 drives the pressing block 325 to rotate so as to enable the pressing surface of the pressing block 325 to face the adhesive tape, and the telescopic device 323 drives the pressing block 325 and the adjusting cylinder 326 to synchronously move downwards so as to enable the pressing surface to drive the adhesive tape to be pressed and stuck on the coating; before the film grabbing and removing mechanism 33 grabs the film, the telescopic device 323 drives the pressing block 325 and the adjusting cylinder 326 to move upwards synchronously to glue one end of the film, the adjusting cylinder 326 drives the pressing block 325 to rotate around the fixed shaft to enable the pressing block 325 to be in an inclined state, and the glued end of the film is tilted upwards along with deformation of the adhesive tape so as to facilitate the film grabbing and removing mechanism 33 to grab the film.

It should be noted that, in one of the important points of the present invention, the adjustment of the adhesive tape can be changed by adjusting the posture of the pressing block 325 and the transfer roller 324 fixedly connected to the pressing block 325, so that the end of the coating film is tilted more upward, and the gripping film removing mechanism 33 can grip the end of the coating film better. Here, the pressing block 325 is directly used to directly adsorb the end of the envelope directly upward and downward, and the angle to which the envelope is lifted is generally not greater than 60 °, which is disadvantageous for the grasping and removing mechanism 33 to grasp the envelope. With the structure of the present invention, the angle at which the envelope is lifted can be made 90 ° or close to 90 °, making it easier for the grasping film removing mechanism 33 to grasp the envelope.

After the pressing block 325 is pressed down to make the adhesive tape adhere to one end of the envelope, the adjusting cylinder 326 drives the pressing block 325 to rotate around the fixed shaft to make the pressing block 325 in an inclined state, and at this time, the adhesive tape in the gap 3201 is correspondingly changed and in a slightly tightened state, so that the angle of the envelope lifted is changed by changing the inclination angle of the adhesive tape. Two states are illustrated in fig. 8, in which the press block 325 in the bottom lift membrane assembly 32 is in a state of being about to be vertically pressed out or vertically retracted, and the press block 325 in the top lift membrane assembly 32 is in an inclined state.

The lifting membrane component 32 can further improve the success rate and stability of grabbing the envelope by the membrane grabbing removing mechanism 33.

Optionally, the film grabbing removing mechanism 33 includes a film tearing manipulator 331 and a translation driving device 332 for driving the film tearing manipulator 331 to translate; the film tearing manipulator 331 is provided with a gripper 333 for gripping the film absorbed by the film lifting component 32; after the gripper 333 grips the envelope, the translation driving device 332 drives the film tearing manipulator 331 to move away from the film lifting assembly 32, so that the envelope and the workpiece are completely separated, and the workpiece can simultaneously move along a preset direction.

Optionally, the feeding plate conveying mechanism 1 comprises a frame, a front conveying section 11 arranged on the frame, a middle conveying section 12 arranged on the frame, and a rear conveying section 13 arranged on the frame, wherein the front conveying section 11, the middle conveying section 12 and the rear conveying section 13 are sequentially arranged; the pinch roller blade structure 2 is disposed between the front conveying section 11 and the middle conveying section 12, and the second clamping assembly 31 is disposed between the middle conveying section 12 and the rear conveying section 13.

Wherein a first positioning baffle plate for positioning the workpiece on the washboard station is arranged between the front conveying section 11 and the middle conveying section 12, and a second positioning baffle plate 313 for positioning the workpiece on the film lifting station is arranged between the middle conveying section 12 and the rear conveying section 13. It should be noted that, the second clamping assembly 31 further includes a first clamping lifting cylinder for driving the first clamping plate 311 to lift and a second clamping lifting cylinder for driving the second clamping plate 312 to lift, where the first clamping plate 311 and the second clamping plate 312 are close to each other to clamp one end of the workpiece.

Optionally, the film tearing device further comprises a detection device 4 arranged at the rear end of the second clamping assembly 31 and used for detecting whether a film remains on the workpiece; the detecting device 4 comprises a plurality of visual detecting units which are arranged in a arrayed manner, so that unqualified products are prevented from flowing into the next production station.

Optionally, the film tearing apparatus further comprises film collecting means for collecting the envelope removed by the film grasping removal mechanism 33; the film collecting device comprises a blowing unit 5 arranged at one side of the film lifting device 3 and a film collecting box for receiving the envelope blown by the blowing unit 5; the opening of the film collecting box faces to the blowing unit 5; the film grabbing and removing mechanism 33 at one side of the bottom of the workpiece further comprises blanking rings 301, and the two blanking rings 301 are respectively arranged at two sides of the grabber 333, so that the film is guided to fall off when the grabber 333 descends to avoid the film from being hung on the grabber 333. The blanking ring 301 can effectively prevent the envelope from being hung on the opening and closing clamping jaw 3332.

Optionally, the gripper 333 includes a fixed gripper 3331, an opening and closing gripper 3332, and a clamping cylinder 3334 for driving the opening and closing gripper 3332 toward or away from the fixed gripper; the opening and closing clamp jaw 3332 is rotatably mounted on the fixed jaw 3331, and the opening and closing clamp jaw 3332 has an L-shaped clamping portion for fitting the clamping portion of the fixed jaw 3331.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A film tearing apparatus, comprising:

the feeding plate conveying mechanism (1) is used for conveying the workpiece along a preset direction;

the rubbing wheel pressing plate structure (2) comprises a first clamping component (21) used for clamping one end of a workpiece and a rubbing wheel component (22) used for rubbing one end of a coating film on the workpiece;

a film lifting device (3) comprising a second clamping assembly (31) for clamping one end of a workpiece, a film lifting assembly (32) for sticking one end of a rubbed film and a film grabbing and removing mechanism (33) for grabbing and removing the stuck film;

the rubbing wheel pressing plate structure (2) and the film lifting device (3) are arranged at intervals along a preset direction.

2. The film tearing apparatus of claim 1, wherein the first clamping assembly (21) comprises a first clamping block (211), a first lifting device (212), a second clamping block (213) and a second lifting device (214);

the first clamping block (211) and the second clamping block (213) are oppositely arranged, and the first lifting device (212) is arranged on one side of the top of the workpiece and is used for driving the first clamping block (211) to be close to or far away from the second clamping block (213); the second lifting device (214) is arranged at one side of the bottom of the workpiece and is used for driving the second clamping block (213) to be close to or far away from the first clamping block (211).

3. The film tearing apparatus according to claim 1, wherein the rubbing wheel assembly (22) comprises a first rubbing wheel (221), a third lifting device (222), a second rubbing wheel (223), a fourth lifting device (224), and a linear module (225) for driving the third lifting device (222) and the fourth lifting device (224) to move along a preset second direction;

the first rubbing wheel (221) and the second rubbing wheel (223) are oppositely arranged, and the third lifting device (222) is arranged on one side of the top of the workpiece and is used for driving the first rubbing wheel (221) to be close to or far away from the second rubbing wheel (223); the fourth lifting device (224) is arranged at one side of the bottom of the workpiece and is used for driving the second rubbing wheel (223) to be close to or far away from the first rubbing wheel (221).

4. The film tearing apparatus of claim 1, wherein the film lifting assembly (32) comprises a tape unreeling device (321) and a tape reeling device (322), and a telescoping device (323) disposed between the tape unreeling device (321) and the tape reeling device (322), the telescoping device (323) being used for ejecting a tape to stick the loosened film.

5. The film tearing apparatus of claim 4, wherein said film tearing assembly further comprises a plurality of transfer rollers (324);

a fixed shaft is arranged on a telescopic shaft of the telescopic device (323), a pressing block (325) is rotatably arranged on the fixed shaft, the lifting membrane assembly (32) further comprises an adjusting cylinder (326), the pressing block (325) is fixedly connected with at least one transfer roller (324), and a gap (3201) for a tape to pass through is formed between the pressing block (325) and the transfer roller (324) which is fixedly connected to the pressing block (325);

the adjusting cylinder (326) is fixedly connected with a telescopic shaft of the telescopic device (323) and is used for driving the pressing block (325) to rotate around the fixed shaft; when the coating is required to be adsorbed, the adjusting cylinder (326) drives the pressing block (325) to rotate so as to enable the pressing surface of the pressing block (325) to face the adhesive tape, and the telescopic device (323) drives the pressing block (325) and the adjusting cylinder (326) to synchronously move downwards so as to enable the adhesive tape to be pressed and stuck on the coating; before the film grabbing removing mechanism (33) grabs the film, the telescopic device (323) drives the pressing block (325) and the adjusting cylinder (326) to move upwards synchronously to glue one end of the film, the adjusting cylinder (326) drives the pressing block (325) to rotate around the fixed shaft so that the pressing block (325) is in an inclined state, and the glued end of the film is tilted upwards along with deformation of the adhesive tape so as to facilitate the film grabbing removing mechanism (33) to grab the film.

6. The film tearing apparatus according to claim 1, wherein the film grasping removal mechanism (33) includes a film tearing manipulator (331) and a translation driving device (332) for driving the film tearing manipulator (331) to translate; a gripper (333) for gripping the envelope adsorbed by the membrane lifting assembly (32) is arranged on the membrane tearing mechanical arm (331);

after the coating is grasped by the grippers (333), the translation driving device (332) drives the film tearing manipulator (331) to move in a direction away from the film lifting assembly (32).

7. The film tearing apparatus according to claim 1, wherein the feeding conveying mechanism (1) comprises a frame, a front conveying section (11) mounted on the frame, a middle conveying section (12) mounted on the frame, a rear conveying section (13) mounted on the frame, the front conveying section (11), the middle conveying section (12) and the rear conveying section (13) being arranged in sequence;

the rubbing wheel pressing plate structure (2) is arranged between the front conveying section (11) and the middle conveying section (12), and the second clamping assembly (31) is arranged between the middle conveying section (12) and the rear conveying section (13).

8. The film tearing apparatus according to claim 1, further comprising a detecting device (4) provided at a rear end of the second clamping assembly (31) for detecting whether or not a film remains on a workpiece;

the detection device (4) comprises a plurality of visual detection units which are arranged in a arrayed mode.

9. A film tearing apparatus according to claim 1, further comprising film collection means for collecting the envelope removed by said film grasping removal mechanism (33);

the film collecting device comprises a blowing unit (5) arranged at one side of the film lifting device (3) and a film collecting box for receiving the envelope blown by the blowing unit (5); the opening of the film collecting box faces the blowing unit (5);

the film grabbing removing mechanism (33) on one side of the bottom of the workpiece further comprises blanking rings (301), the two blanking rings (301) are respectively arranged on two sides of the grippers (333), and when the grippers (333) descend, the film grabbing removing mechanism guides the film to fall off so as to prevent the film from being hung on the grippers (333).

10. The film tearing apparatus of claim 6, wherein the gripper (333) comprises a fixed jaw (3331), an opening and closing jaw (3332), and a clamping cylinder (3334) for driving the opening and closing jaw (3332) closer to or farther from the fixed jaw;

the opening and closing clamping jaw (3332) is rotatably mounted on the fixed jaw (3331), and the opening and closing clamping jaw (3332) is provided with an L-shaped clamping part for being attached to the clamping part of the fixed jaw (3331).