Automatic film tearing device

Abstract

The application discloses an automatic film tearing device, comprising a fixed plate and at least two film tearing mechanisms. The film tearing mechanism comprises a feeding wheel, a collecting wheel, a pressing head and an adhesive tape. The feeding wheel and the collecting wheel are rotatably arranged on the fixed plate. The two ends of the adhesive tape are wound around the feeding wheel and the collecting wheel respectively. The pressing head is fixed below the fixed plate. The side of the pressing head away from the fixed plate is a pressing surface. The adhesive tape has an adhesive surface and a non-adhesive surface. The non-adhesive surface abuts against the pressing surface of the pressing head. The pressing head presses the adhesive tape against the film on the product to be torn. The pressing head moves upwards, and the adhesive surface of the adhesive tape sticks to the film on the product to be torn. In the application, each pressing head exists in a different film tearing mechanism. The transmission speed and the pulling force of the adhesive tape in each film tearing mechanism can be adjusted by changing the rotation speed of the feeding wheel and the collecting wheel in the corresponding film tearing mechanism. In this way, the pulling force of the adhesive tape on each pressing head is basically consistent, and the difference in product yield during film tearing in different film tearing mechanisms is reduced.

Description

Technical Field

[0001] This invention relates to the field of PCB surface film peeling technology, and more particularly to an automatic film peeling device. Background Technology

[0002] Marlin firmware is a type of 3D printed firmware. During the Sputter (magnetron sputtering) process in the manufacturing process, a Mylar film is first applied to the product surface to protect the PCB surface and prevent it from being affected during sputtering. After the sputter process is completed, the Mylar film on the PCB surface is removed to expose the PCB, facilitating soldering and component placement in subsequent stages where SMT (Surface Mount Technology) components will be mounted.

[0003] In actual production, the film-tearing process was initially done manually, which was time-consuming, labor-intensive, and involved a huge workload. To improve operational efficiency and reduce the risks associated with manual labor, many companies and factories have introduced Mylar tearing equipment.

[0004] However, most existing Mylar tearing equipment uses a single-head, single-motor, single-pulley control for dual-head tearing, which does not maximize machine output. Moreover, the single-motor, single-pulley module control for dual-head tearing is not effective, easily leading to incomplete tearing, inconsistent movements of the two tearing heads, and inconvenience in adjusting the conveyor speed and force of either belt.

[0005] Therefore, how to improve the technical defects existing in the prior art has always been a problem that ordinary people skilled in the art need to solve. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic film-tearing device in which the film-tearing mechanism has a consistent film-tearing action, which can effectively reduce the product yield difference when different film-tearing mechanisms tear the film, facilitate the analysis of common problems in the later stage, and thus improve the output efficiency of the film-tearing equipment and the product yield.

[0007] The technical solution provided by this invention is as follows:

[0008] An automatic film-tearing device, comprising:

[0009] A fixed plate and at least two film-tearing mechanisms;

[0010] The film-tearing mechanism includes a feeding wheel, a receiving wheel, a pressure head, and a tape. The feeding wheel and the receiving wheel are both mounted on the fixed plate and are rotatable. The two ends of the tape are respectively wrapped around the feeding wheel and the receiving wheel. The pressure head is fixed below the fixed plate.

[0011] The side of the pressure head away from the fixed plate is the downward pressure surface, and the tape has an adhesive surface and a non-adhesive surface that are arranged opposite to each other;

[0012] The non-adhesive side of the tape abuts against the pressing surface of the pressure head. When the pressure head presses down, the tape presses firmly against the film on the product to be peeled off. When the pressure head moves up, the adhesive side of the tape adheres to the film on the product to be peeled off.

[0013] In some embodiments, the pressure head is located on the side away from the fixed plate, and has a receiving groove on both sides in the belt drive direction; and

[0014] The fixing plate is provided with a first guide wheel in the area near the pressure head and on both sides of the pressure head to guide the tape to fit as closely as possible to the two receiving grooves on the pressure head.

[0015] In some embodiments, the pressing surface of the pressure head is provided with a boss, and the non-adhesive surface of the tape abuts against the boss;

[0016] and / or

[0017] The pressing surface of the pressure head is provided with an elastic element, and a locking block is connected to the end of the elastic element. The locking block is used to press the product to be peeled to prevent the product from being stuck by the tape during the peeling process; and the locking block is provided with a clearance hole for the tape to pass through.

[0018] In some embodiments, the film-tearing mechanism further includes a driving member;

[0019] The drive unit drives the take-up wheel to rotate, so that the tape released by the unloading wheel wraps around the take-up wheel.

[0020] In some embodiments, the film-tearing mechanism further includes a resistance adjuster;

[0021] The resistance adjuster is connected to the feeding wheel to limit the feeding wheel from rotating under the drive of the receiving wheel, so that the tape is kept taut and the tape is prevented from sticking or tangling.

[0022] In some embodiments, the film-tearing mechanism further includes a drive wheel;

[0023] The drive wheel is fixed to the fixed plate and can rotate, and is driven by the drive component to drive the tape to wrap around the take-up wheel.

[0024] In some embodiments, the film-tearing mechanism further includes a pressure roller;

[0025] The pressure roller is fixed to the fixed plate and can rotate, and the pressure roller and the drive wheel are respectively located on both sides of the tape;

[0026] The pressure roller is adapted to press the tape tightly against the drive wheel to increase the friction between the drive wheel and the tape, thereby causing the drive wheel to drive the tape to move.

[0027] In some embodiments, the drive member has a drive shaft, and the drive shaft is fixed with a first pulley and a second pulley;

[0028] The rotating shaft of the receiving wheel is fixed with a third pulley, and the first pulley and the third pulley are connected by a transmission belt; and the rotating shaft of the drive wheel is fixed with a fourth pulley, and the second pulley and the fourth pulley are connected by a transmission belt.

[0029] In some embodiments, the fixing plate is provided with a plurality of second guide wheels to guide the tape to change direction.

[0030] In some embodiments, the film-tearing mechanism further includes a tape metering wheel;

[0031] The tape measuring wheel is fixed to the fixing plate and abuts against the tape to record the length of the tape.

[0032] The technical effects of this invention are as follows:

[0033] 1. In existing technologies, the most common automatic film-tearing devices employ a structure where a single adhesive tape abuts against two pressure heads. Because the tape end is subjected to tension, the tape itself deforms, easily leading to deviations in the tape's movement position at the two pressure heads. This results in inconsistent film-tearing actions, affecting the film-tearing effect, as well as the production efficiency and product yield of the film-tearing equipment. In this patent, however, each pressure head for film tearing exists independently in a different film-tearing mechanism; that is, each tape abuts against only one pressure head, minimizing the deviation in the tape's movement position at each pressure head. Simultaneously, the tape conveying speed and pulling force within each film-tearing mechanism can be individually adjusted by changing the rotation speed of the corresponding feeding and receiving rollers. This ensures that the pulling force on the tape at each pressure head is roughly consistent, further reducing the deviation in the movement position between different tapes, improving the consistency of the film-tearing action, and thus reducing product yield differences between different film-tearing mechanisms. This facilitates subsequent analysis of common problems and helps technicians improve the production efficiency and product yield of the film-tearing equipment. Furthermore, in existing technologies, a single adhesive tape often needs to adhere to film in two areas, resulting in a greater tensile force on the tape compared to the tape provided in this embodiment, which only needs to adhere to film in one area, making the tape more prone to breakage. However, if the tensile force is reduced, incomplete film removal may occur. Therefore, compared to existing technologies, the automatic film-removing device provided in this patent allows users to better control the tensile force on the tape, thereby improving the film-removing effect of the automatic film-removing device.

[0034] 2. In this patent, the drive wheel is designed to assist the take-up wheel in moving the tape. This reduces the tension on the tape at the take-up wheel, preventing large deformation or breakage of the tape, reducing downtime, and ensuring the production efficiency of the film-tearing equipment.

[0035] 3. Since the drive wheel is mainly used to assist the take-up wheel in driving the conveyor belt, under normal circumstances, the drive wheel and the take-up wheel run or stop simultaneously. This patent addresses this by setting a first pulley and a second pulley on the drive shaft of the drive component, a third pulley on the rotating shaft of the take-up wheel, and a fourth pulley on the rotating shaft of the drive wheel. The first and third pulleys, as well as the second and fourth pulleys, are then connected by transmission belts. In this way, only one motor is needed to drive both the take-up wheel and the drive wheel simultaneously, meeting the requirement for simultaneous operation and stopping of both wheels, optimizing the structural design, saving material costs and space, and demonstrating strong practicality. Attached Figure Description

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0037] Figure 1 This is a front view of an existing automatic film-tearing device;

[0038] Figure 2 This is a front view of the automatic film-tearing device provided by the present invention;

[0039] Figure 3 yes Figure 2 A magnified view of a portion at point A shown;

[0040] Figure 4 This is a three-dimensional structural diagram of the automatic film-tearing device provided by the present invention;

[0041] Figure 5 This is a three-dimensional structural diagram of the pressure head provided by the present invention in one state;

[0042] Figure 6 This is a three-dimensional structural diagram of the pressure head provided by the present invention in another state.

[0043] Explanation of icon numbers:

[0044] 100. Fixed plate; 110. First guide wheel; 120. Second guide wheel;

[0045] 200. Film tearing mechanism; 210. Feeding roller; 220. Receiving roller; 221. Third pulley; 230. Pressure head; 231. Receiving groove; 232. Boss; 233. Clamping block; 2331. Clearance hole; 240. Adhesive belt; 250. Driving component; 251. First pulley; 252. Second pulley; 253. Transmission belt; 260. Resistance adjuster; 270. Drive wheel; 271. Fourth pulley; 280. Pressure roller; 290. Adhesive belt metering wheel;

[0046] 300. Products with film to be removed. Detailed Implementation

[0047] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0049] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0050] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0051] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of the invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0053] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] According to a specific embodiment provided by the present invention, see [link to specific embodiment]. Figures 2 to 6 An automatic film-tearing device is disclosed, specifically including a fixed plate 100 and at least two film-tearing mechanisms 200. Each film-tearing mechanism 200 includes a feeding roller 210, a receiving roller 220, a pressure head 230, and an adhesive tape 240. The feeding roller 210 and the receiving roller 220 are rotatably mounted on the fixed plate 100. The two ends of the adhesive tape 240 are respectively wound around the feeding roller 210 and the receiving roller 220. The pressure head 230 is fixed below the fixed plate 100. The side of the pressure head 230 away from the fixed plate 100 is the downward pressing surface. The adhesive tape 240 has opposing adhesive and non-adhesive surfaces. The non-adhesive surface of the adhesive tape 240 abuts against the downward pressing surface of the pressure head 230. The pressure head 230 presses the adhesive tape 240 firmly onto the film on the product 300 to be peeled, allowing the adhesive surface of the adhesive tape 240 to adhere to the film on the product 300.

[0055] See Figure 1 Generally speaking, the most common automatic film-tearing devices in the existing technology use a structure in which a single tape 240 simultaneously abuts against two pressure heads 230. Because the ends of the tape 240 are subjected to tension, the tape 240 itself will also deform. This can easily lead to deviations in the movement position of the tape 240 at the two pressure heads 230, resulting in inconsistent film-tearing actions, affecting the film-tearing effect, as well as the output efficiency and product yield of the film-tearing equipment.

[0056] In this embodiment, see Figure 2 Each pressure head 230 used for tearing film exists independently in a different film tearing mechanism 200. That is, each tape 240 also abuts against only one pressure head 230, which can minimize the deviation of the tape 240's movement position at each pressure head 230.

[0057] Meanwhile, the conveying speed and pulling force of the tape 240 within each film-tearing mechanism 200 can be individually adjusted by changing the rotation speed of the feeding roller 210 and the receiving roller 220 within the corresponding film-tearing mechanism 200. In this way, users can ensure that the pulling force on the tape 240 on each pressure head 230 is roughly consistent by individually adjusting different film-tearing mechanisms 200, further reducing the deviation in the movement position between different tapes 240, thereby improving the consistency of the film-tearing action and reducing the product yield differences during film tearing by different film-tearing mechanisms 200, facilitating subsequent analysis of common problems. This is more conducive to technicians making improvements to address problems, thereby increasing the output efficiency and product yield of the film-tearing equipment.

[0058] Furthermore, in existing technologies, a single adhesive tape 240 often needs to adhere to film in two areas. This results in the adhesive tape 240 requiring a greater tensile force than the adhesive tape 240 provided in this embodiment, which only needs to adhere to film in one area, making the tape 240 more prone to breakage. Conversely, if the tensile force is reduced, incomplete film removal may occur. Therefore, compared to existing technologies, the automatic film-removing device provided in this embodiment allows users to better control the tensile force on the adhesive tape 240, thereby improving the film-removing effect of the automatic film-removing device and significantly saving factory labor costs.

[0059] Specifically, during the entire film-tearing process, the pressure head 230 first presses down, causing the adhesive tape 240 to adhere to the film on the product 300 to be peeled. Then, the pressure head 230 moves upward, and the adhesive tape 240 lifts up the film on the product 300. Finally, the take-up roller 220 rotates, driving the adhesive tape 240 to completely peel off the film from the product 300.

[0060] Specifically, see Figure 2 , Figure 5 and Figure 6 The pressure head 230 is located on the side away from the fixed plate 100, and a receiving groove 231 is provided on both sides of the conveyor belt 240 in the transmission direction. The receiving groove 231 has an inclined surface, which forms a certain inclination angle with the downward pressing surface of the pressure head 230 to ensure that the conveyor belt 240 fits as closely as possible to the receiving groove 231 during transmission.

[0061] The fixing plate 100 is provided with a first guide wheel 110 in the area near the pressure head 230 and on both sides of the pressure head 230 to guide the tape 240 to adhere to the two inclined surfaces of the two receiving grooves 231 on the pressure head 230.

[0062] It is worth noting that in this embodiment, the specific structural settings of each pressure head 230 should be the same, and the positional distribution of the first guide wheel 110 near each pressure head 230 relative to the corresponding pressure head 230 should also be largely consistent. In this way, the winding angle and layout of the tape 240 at each pressure head 230 can be consistent, thereby effectively ensuring the consistency of the film-tearing action of different film-tearing mechanisms 200, reducing the product yield difference when different film-tearing mechanisms 200 tear the film, and improving the output efficiency and product yield of the film-tearing equipment.

[0063] Furthermore, by incorporating the first guide wheel 110, this embodiment can prevent the tape 240 from being worn off due to friction with the edge of the pressure head 230 receiving groove 231 during movement, thus ensuring the performance and lifespan of the automatic film-tearing device. Of course, the first guide wheel 110 can also help disperse the tensile force on the tape 240 to a certain extent, preventing it from being torn during movement, making it highly practical.

[0064] Preferably, see Figure 2 , Figure 5 and Figure 6 The pressing surface of the pressure head 230 is provided with a boss 232, and the non-adhesive surface of the adhesive tape 240 abuts against the boss 232. In this embodiment, by providing the boss 232, the contact area between the pressure head 230 and the adhesive tape 240 is reduced. Correspondingly, the contact area between the adhesive tape 240 and the film on the product 300 to be peeled is also reduced. Thus, under the same pressure, the pressure between the adhesive tape 240 and the film will increase, which allows the adhesive surface of the adhesive tape 240 to adhere more tightly to the film, thereby making it easier for the adhesive tape 240 to adhere to the film and peel the film off the product 300. This improves the peeling effect of the automatic film peeling device and significantly saves factory labor costs.

[0065] Further, see Figure 2 , Figure 5 and Figure 6The pressing surface of the pressure head 230 is provided with an elastic element, and a locking block 233 is connected to the end of the elastic element to press the product 300 to be peeled, so as to prevent the product 300 to be peeled from being stuck by the tape 240 during the peeling process. At this time, the locking block 233 should be provided with a clearance hole 2331 for the tape 240 to pass through.

[0066] During the film-removing process, when the pressure head 230 and the tape 240 move upward relative to the product 300 to be peeled, in addition to the film on the product being peeled being picked up by the tape 240, the product 300 to be peeled may also be picked up by the tape 240, causing peeling failure and other adverse effects. To address this, this embodiment provides a locking block 233 with a clearance hole 2331 through which the tape 240 can pass to prevent the tape 240 from sticking to the product 300 to be peeled. In addition, an elastic element is provided on the side of the pressure head 230 away from the fixing plate 100. On the one hand, the elastic element ensures that the locking block 233 can hold the product 300 to be peeled during the downward or upward movement of the pressure head 230, preventing the product 300 to be peeled from being picked up; on the other hand, the elastic element can play a certain buffering role, preventing impact between the locking block 233 and the product 300 to be peeled, avoiding hard collisions, and ensuring product yield.

[0067] In actual production, the elastic element can be a spring or a sheet spring, and there are no restrictions on it, as both are within the protection scope of this invention.

[0068] Specifically, see Figure 2 and Figure 4 The film-tearing mechanism 200 also includes a drive component 250, which is drivenly connected to the take-up roller 220 to drive the take-up roller 220 to rotate, thereby releasing the tape 240 in the feed roller 210 and causing the released tape 240 to wrap around the take-up roller 220. Thus, when the tape 240 adheres to the film on the product being peeled off via the pressure head 230, the drive component 250 can directly drive the take-up roller 220 to rotate, which in turn pulls the tape 240, causing it to peel off the film. This achieves automated operation of the automatic film-tearing device, saving film-tearing time, improving the output efficiency of the film-tearing equipment, and significantly reducing factory labor costs. Users can change the conveying speed of the tape 240 by changing the rotation speed of the drive component 250.

[0069] Preferably, see Figure 2 and Figure 4The film-tearing mechanism 200 also includes a resistance adjuster 260, which is connected to the feeding wheel 210 to limit the rotation of the feeding wheel 210 under the drive of the receiving wheel 220, so that the tape 240 is kept taut. This prevents the automatic film-tearing device from having a poor film-tearing effect or even jamming due to local adhesion or entanglement of the tape 240, thereby reducing downtime and ensuring the actual performance and safety performance of the automatic film-tearing device.

[0070] Specifically, the resistance adjuster 260 is sleeved on the rotating shaft of the feeding roller 210, and the rotating shaft of the feeding roller 210 can rotate relative to the resistance adjuster 260. At this time, the resistance adjuster 260 applies pressure to the rotating shaft of the feeding roller 210, thereby limiting the rotation of the feeding roller 210. Thus, the user can change the magnitude of the friction between the resistance adjuster 260 and the rotating shaft of the feeding roller 210 by changing the pressure applied by the resistance adjuster 260 to the rotating shaft, thereby adjusting the tension of the tape 240. It is worth noting that during the adjustment process, the user must avoid winding the tape 240 too loosely, which would affect the film-tearing effect, and also avoid winding the tape 240 too tightly, which would cause the tape 240 to break.

[0071] Conversely, users can adjust the rotational speed of the drive unit 250 and the resistance of the resistance regulator 260 to the rotation of the feeding wheel 210 to change the tension on the tape 240. This is highly practical and helps users adjust the tension on the tape 240 on each pressure head 230 to be the same, thereby reducing the deviation in the movement position between different tapes 240, improving the consistency of the film-tearing action, reducing the product yield difference when different film-tearing mechanisms 200 are tearing film, facilitating the analysis of common problems in the later stage, and helping technicians to improve the output efficiency of the film-tearing equipment and the product yield.

[0072] Further, see Figure 2 and Figure 4 The film-tearing mechanism 200 also includes a drive wheel 270, which is rotatably fixed to the fixed plate 100 and driven by the drive component 250 to drive the tape 240 to wrap around the take-up wheel 220. It can be seen that during movement, the tape 240 is subjected to both the tension of the take-up wheel 220 and the force of the drive wheel 270. However, unlike the take-up wheel 220, in this embodiment, the tape 240 is not wrapped around the drive wheel 270. Compared to the take-up wheel 220 directly pulling the tape 240, the drive wheel 270 only assists in moving the tape 240. This reduces the tension on the tape 240 at the take-up wheel 220, preventing significant deformation or breakage of the tape 240, reducing downtime, and ensuring the production efficiency of the film-tearing equipment.

[0073] Furthermore, see Figure 3 and Figure 4 The film-tearing mechanism 200 also includes a pressure roller 280, which is rotatably fixed to the fixed plate 100, and the pressure roller 280 and the drive wheel 270 are located on opposite sides of the tape 240. At this time, the pressure roller 280 is adapted to press the tape 240 tightly against the drive wheel 270 to increase the friction between the drive wheel 270 and the tape 240, thereby causing the drive wheel 270 to drive the tape 240 to move.

[0074] In one specific embodiment, see Figure 2 and Figure 4 The driving component 250 is preferably a motor with a drive shaft, and the drive shaft is fixed with a first pulley 251 and a second pulley 252. The rotating shaft of the receiving wheel 220 is fixed with a third pulley 221, and the first pulley 251 and the third pulley 221 are connected by a transmission belt 253. Conversely, the rotating shaft of the driving wheel 270 is fixed with a fourth pulley 271, and the second pulley 252 and the fourth pulley 271 are connected by a transmission belt 253.

[0075] Since the drive wheel 270 is mainly used to assist the take-up wheel 220 in driving the conveyor belt 240, under normal circumstances, the drive wheel 270 and the take-up wheel 220 run or stop simultaneously. However, in this embodiment, a first pulley 251 and a second pulley 252 are installed on the drive shaft of the drive component 250, a third pulley 221 is installed on the rotation shaft of the take-up wheel 220, and a fourth pulley 271 is installed on the rotation shaft of the drive wheel 270. Then, a transmission belt 253 connects the first pulley 251 and the third pulley 221, as well as the second pulley 252 and the fourth pulley 271. Thus, only one motor is needed to drive the take-up wheel 220 and the drive wheel 270 simultaneously, meeting the requirement that the drive wheel 270 and the take-up wheel 220 run or stop simultaneously, while also optimizing the structural design, saving material costs and space, and demonstrating strong practicality.

[0076] In actual production, besides connecting the first pulley 251 and the third pulley 221 via a transmission belt 253, a connecting rod can also be used to connect them. In this case, both ends of the connecting rod should be rotatably fixed to the eccentric positions of the first pulley 251 and the third pulley 221 to ensure that the first pulley 251 can drive the third pulley 221 to rotate. Similarly, besides connecting the second pulley 252 and the fourth pulley 271 via a transmission belt 253, a connecting rod can also be used. Again, both ends of the connecting rod should be rotatably fixed to the eccentric positions of the second pulley 252 and the fourth pulley 271 to ensure that the second pulley 252 can drive the fourth pulley 271 to rotate. Of course, besides the possible implementations mentioned in this embodiment, other structural arrangements, such as gear meshing, can also be used, which are not detailed here but are all within the scope of protection of this invention.

[0077] Specifically, see Figure 2 The fixed plate 100 is provided with a plurality of second guide wheels 120 to guide the tape 240 to turn. In this embodiment, by setting the second guide wheels 120 with a wheel-like structure, right-angle bends of the tape 240 can be avoided when turning. Compared with some guide structures with sharp parts, the tape 240 guided by the second guide wheels 120 is less likely to be damaged by edge friction, reducing downtime. In addition, the second guide wheels 120 and the tape 240 are in rolling contact, resulting in low friction and better guiding effect. Moreover, the second guide wheels 120 can also help to disperse the tension on the tape 240 to a certain extent, effectively reducing the amount of pulling force on the tape 240 during movement, avoiding large deformation deviations or breakage of the tape 240, which can also reduce downtime and ensure the output efficiency of the film-tearing equipment.

[0078] Specifically, see Figure 2 The film-tearing mechanism 200 also includes a tape measuring wheel 290, which is fixed to the fixing plate 100 and abuts against the tape 240 to record the length of the tape 240.

[0079] In this embodiment, the tape metering wheel 290 is preferably cylindrical. On the one hand, it can guide the tape 240 to turn; on the other hand, it can also help the tape 240 to disperse the tension it receives to a certain extent, effectively reducing the amount of tension on the tape 240 during movement, avoiding large deformation deviations or breakage of the tape 240, reducing downtime, and ensuring the output efficiency of the film-tearing equipment.

[0080] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0081] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic film tearing device characterized by, The automatic film tearing device comprises: a fixed plate and at least two film tearing mechanisms; the film tearing mechanism comprises a feeding wheel, a collecting wheel, a pressing head and a tape, the feeding wheel and the collecting wheel are arranged on the fixed plate and can rotate, two ends of the tape are wound on the feeding wheel and the collecting wheel respectively, and the pressing head is fixed below the fixed plate; one side of the pressing head away from the fixed plate is a pressing surface, and the tape has an adhesive surface and a non-adhesive surface arranged oppositely; wherein the non-adhesive surface of the tape abuts against the pressing surface of the pressing head, when the pressing head is pressed down, the tape is pressed against the film on the product to be torn, when the pressing head is moved up, the adhesive surface of the tape sticks to the film on the product to be torn; the pressing surface of the pressing head is provided with a boss, and the non-adhesive surface of the tape abuts against the boss; the pressing surface of the pressing head is provided with an elastic element, the end of the elastic element is connected with a clamping block, the clamping block is used to press the product to be torn to avoid that the product to be torn is stuck by the tape during the film tearing process; and the clamping block is provided with an avoiding hole for the tape to pass through.

2. The automatic film tearing device of claim 1, wherein , the side of the pressing head away from the fixed plate and the two sides in the transmission direction of the tape are both provided with a containing groove; and the fixed plate is provided with a first guide wheel on both sides near the pressing head to guide the tape to be as close as possible to the two containing grooves on the pressing head.

3. The automatic film tearing device according to claim 1 or 2, wherein the film tearing mechanism further comprises a driving element; the driving element drives the collecting wheel to rotate, so that the tape released by the feeding wheel is wound on the collecting wheel.

4. The automatic film tearing device according to claim 3, wherein the film tearing mechanism further comprises a resistance adjuster; the resistance adjuster is connected with the feeding wheel to limit the rotation of the feeding wheel driven by the collecting wheel, so that the tape is in a straight state and local adhesion or winding of the tape is avoided.

5. The automatic film tearing device according to claim 3, wherein the film tearing mechanism further comprises a driving wheel; the driving wheel is fixed on the fixed plate and can rotate, and is drivingly connected with the driving element to drive the tape to be wound on the collecting wheel.

6. The automatic film tearing device according to claim 5, wherein the film tearing mechanism further comprises a pressing wheel; the pressing wheel is fixed on the fixed plate and can rotate, and the pressing wheel and the driving wheel are located on both sides of the tape respectively; the pressing wheel is adapted to press the tape against the driving wheel to increase the friction between the driving wheel and the tape, so that the driving wheel drives the tape to move.

7. The automatic film tearing device according to claim 5 or 6, wherein the driving element has a driving shaft, the driving shaft is fixed with a first pulley and a second pulley; the rotating shaft of the collecting wheel is fixed with a third pulley, the first pulley and the third pulley are drivingly connected through a transmission belt; and the rotating shaft of the driving wheel is fixed with a fourth pulley, the second pulley and the fourth pulley are drivingly connected through a transmission belt.

8. The automatic film tearing device according to claim 1 or 2, wherein the fixed plate is provided with a plurality of second guide wheels to guide the tape to turn.

9. The automatic film tearing device according to claim 1 or 2, wherein the film tearing mechanism further comprises a tape metering wheel; the tape metering wheel is fixed to the fixed plate and abuts against the tape to record the length of the tape. ​ ​

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