Automatic production system for EVA (Ethylene Vinyl Acetate) film

Abstract

The invention relates to the technical field of EVA thin films, in particular to an automatic EVA thin film production system which comprises a shell, an extrusion molding device, an embossing cooling device and a winding device and further comprises supports, a guide rod, a sliding frame, a transmission assembly, a cutter and an airflow assembly, the supports are connected to the front side and the rear side of the top of the shell, and the guide rod is connected between the two supports; the sliding frame is connected to the outer surface of the guide rod in a sleeving mode, the transmission assembly is connected to an inner cavity of the sliding frame, the lower end of the transmission assembly extends out of the sliding frame, the cutter is connected to the lower end of the transmission assembly, and the airflow assembly is connected to the inner cavity of the sliding frame. According to the device, the fixed cutter is changed into the movable cutter, so that the contact position of the cutter and the EVA film is changed, on one hand, abrasion of the single position of the cutter is avoided, the service life of the cutter is prolonged, on the other hand, the cutting effect is improved through the movable cutter, and the purpose of improving the trimming quality of the EVA film is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of EVA films, and specifically to an automated production system for EVA films. Background Art

[0002] EVA film, namely ethylene-vinyl acetate copolymer film, is a new generation of green environmental protection material. Due to its good weather resistance, anti-fogging, heat preservation performance and anti-ultraviolet performance, it is widely used in the production of various outdoor products, such as raincoats and document bags, etc.; The production of EVA film needs to be carried out through an automated production system for EVA film.

[0003] The production process of the automated production system for EVA film is as follows: First, materials such as EVA are melted, then the blank of EVA film is extruded through a die head, then cooled and shaped, and then the EVA film is driven by a traction mechanism to pass through an on-line thickness measurement and slitting and trimming device in sequence to ensure that the thickness, size and dimensions of the EVA film meet the standards. Finally, the coiling mechanism winds and packages the film with uniform thickness. During the process of trimming the EVA film by the slitting and trimming device, since the position of the cutting tool is fixed, the contact point between the EVA film and the cutting tool always remains at the same point. And the EVA film will be in contact with the cutting tool for a long time during the production process, which is likely to cause wear and notch of the cutting tool. The cutting effect at the notch decreases, resulting in uneven edges of the EVA film during the cutting process of the EVA film, affecting the quality of the EVA film. In view of the above problems, in the prior art, the cutting tool is often replaced after a specified time of cutting the EVA film to avoid damage to the edges of the EVA film caused by tool wear. However, when the EVA film is used in the production of document bags, some manufacturers will perform embossing treatment on the EVA film in order to improve the anti-slip performance of the document bags. The grooves and protrusions generated by the embossing treatment will cause the wear amount of the cutting tool to be uncontrollable when the cutting tool cuts the embossed EVA film, resulting in irregular replacement time of the cutting tool. If replaced in advance, the production cost will increase, and if replaced too late, the notch on the cutting tool will affect the trimming quality of the edges of the EVA film.

[0004] Therefore, an automated production system for EVA films is proposed. Summary of the Invention

[0005] The object of the present invention is to provide an automatic production system for EVA films, which solves the problem that when a cutter cuts the embossed EVA film, the grooves generated by embossing will cause the wear amount of the cutter to be uncertain, and then the cutter cannot be replaced in time, affecting the trimming quality of the EVA film. By changing the cutter from fixed to movable, the contact position between the cutter and the EVA film is changed. On the one hand, the wear of a single position of the cutter is avoided, and the service life of the cutter is improved. On the other hand, the movable cutter improves the cutting effect, achieving the purpose of improving the trimming quality of the EVA film.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automatic production system for EVA films, comprising a housing, an extrusion device, an embossing and cooling device, and a winding device. The extrusion device is connected to the right side of the housing. The embossing and cooling device and the winding device are both connected to the inner cavity of the housing, and the embossing and cooling device is located on the right side of the winding device. The extrusion device extrudes the EVA film, and the EVA film is wound around the embossing and cooling device and wound by the winding device. It further includes a bracket, a guide rod, a carriage, a transmission component, a cutter, and an air flow component. The bracket is connected to the front and rear sides of the top of the housing. A guide rod is connected between the two brackets. The carriage is sleeved on the outer surface of the guide rod. The transmission component is connected to the inner cavity of the carriage, and the lower end of the transmission component extends out of the carriage. The cutter is connected to the lower end of the transmission component. The air flow component is connected to the inner cavity of the carriage. When the embossing and cooling device conveys the EVA film, the transmission component drives the cutter to move up and down periodically. When the cutter moves up and down, the air flow component generates an air flow acting on the contact surface between the cutter and the EVA film.

[0008] Through the above solution, the transmission component can drive the cutter to move up and down periodically, thereby realizing the cutting of the EVA film, effectively improving the trimming effect of the EVA film. At the same time, the up and down movement of the cutter will cause the air flow component to generate an air flow to blow the contact surface between the cutter and the EVA film, thereby realizing effective chip removal when cutting the embossed EVA film.

[0009] Preferably, the bracket includes a base and a support plate. The base is connected to the top of the housing, and the support plate is connected to the top of the base. The support plate and the side surface of the base are connected by screws.

[0010] Through the above solution, the bracket is designed in a split form into two parts, namely the base and the support plate. Then, in use, on the one hand, it is convenient to replace the support plate, and the height of the carriage can be adjusted by support plates with different heights. On the other hand, it is convenient to remove the carriage for maintenance and adjustment.

[0011] Preferably, the carriage includes a latch and a fixing frame. The latch is sleeved on the circumferential surface of the guide rod. The fixing frame is connected to the lower end of the carriage. The side of the fixing frame away from the bracket is flush with the side of the latch away from the bracket.

[0012] Through the above solution, the side of the fixing frame away from the bracket is flush with the side of the latch away from the bracket. Thus, during the production stage, when adjusting the positions of the two carriages, it is convenient to measure, so as to accurately control the cutting position of the EVA film.

[0013] Preferably, the transmission assembly includes a transmission rod, a driving gear, a driven gear, an installation wheel, a connecting rod, a slider and an installation frame. The transmission rod is connected to the support plate, and the front end of the transmission rod extends to the front side of the front support plate and is connected to the embossing and cooling device through a transmission belt. The driving gear is connected to the upper end inside the fixing frame. The driven gear is meshed and connected to the lower side of the driving gear and is rotatably connected to the inner cavity of the carriage. The installation wheel is connected to the side of the driven gear away from the support plate. One end of the connecting rod is connected to the side of the installation wheel away from the support plate. The slider is connected to the other end of the connecting rod. The installation frame is connected to the lower side of the slider. The lower side of the slider passes through the fixing frame. The connection point of the connecting rod and the installation wheel deviates from the axis of the installation wheel.

[0014] Through the above solution, the lower side of the slider passes through the fixing frame, and the fixing frame limits the sliding position of the slider, so that the slider can only slide up and down. Thus, the up and down sliding of the tool is realized, which is convenient for trimming the EVA film.

[0015] Preferably, the surface of the transmission rod is provided with notches at equal angles. One side of the notch is arc-shaped. A block is connected to the inner wall of the driving gear, and the block is adaptively clamped with the notch.

[0016] Through the above solution, the driving gear can be adjusted in position on the rod while ensuring the rotation effect of the transmission rod on the driving gear, which is convenient for trimming EVA films of different sizes. At the same time, one side of the notch is arc-shaped. On the one hand, when the transmission rod rotates, it can reduce the accumulation of cutting waste chips in the notch. On the other hand, it increases the contact area between the transmission rod and the block, thereby increasing the force-bearing area of the block and achieving the purpose of improving the transmission stability.

[0017] Preferably, the tool is installed on the installation frame, and the side of the tool away from the support plate is in the same plane as the side of the fixing frame away from the support plate.

[0018] Through the above solution, the side surface of the tool is in the same plane as the side wall of the fixing frame. Thus, the distance between the tools can be adjusted by measuring the side wall of the carriage, and further, the purpose of facilitating the adjustment of the cutting position of the EVA film to ensure the dimensional requirements of the EVA film is achieved.

[0019] Preferably, the air flow assembly includes a longitudinal airbag, a transverse airbag, a pressing plate, an adjusting bar, and a guide post. The longitudinal airbag and the transverse airbag are both connected to the inner cavity of the fixed frame, and the transverse airbag is located on the left side of the longitudinal airbag. The pressing plate is connected to the right side of the slider, the adjusting bar is connected to the left side of the slider, and the guide post is connected to the left side of the rear end of the transverse pressing plate. The adjusting bar is inclined, and when the slider drives the adjusting bar to move upward, the adjusting bar contacts the guide post.

[0020] Through the above solution, the up and down movement of the slider can alternately drive the longitudinal airbag and the transverse airbag to blow air alternately, thereby avoiding the accumulation of waste chips when the tool cuts the embossed EVA film. At the same time, the air flow acting on the tool can effectively prevent the tool from accumulating heat and extend the service life of the tool.

[0021] Preferably, the longitudinal airbag includes a fixed plate, a first airbag body, and a movable plate. The fixed plate, the first airbag body, and the movable plate are arranged in sequence from bottom to top. The fixed plate is fixedly connected to the inner cavity of the fixed frame. Air holes are provided on the lower side of the fixed plate, and the longitudinal section of the air holes is trapezoidal in reverse. When the tool moves up and down, the top view projection of the effective contact length with the EVA film is a, and the distance value between the left and right ends of the air holes is greater than a. Thus, when the longitudinal airbag is pressed to blow air, it can ensure effective blowing on the tool, thereby achieving the purpose of removing chips and cooling.

[0022] Preferably, the transverse airbag includes a positioning plate, a second airbag body, and a moving plate. The positioning plate, the second airbag body, and the moving plate are connected in sequence from right to left. The guide post is connected to the moving plate. Spray holes are provided on the lower side of the inner cavity of the positioning plate. The spray holes are inclined, and the axis of the spray holes coincides with the midline of the tool in the front view.

[0023] Through the above solution, the axis of the spray holes is parallel to the midline of the tool. Thus, when the tool is withdrawn, the air flow generated by the spray holes can keep in contact with the surface of the tool, thereby effectively improving the chip removal effect.

[0024] Preferably, the top surface of the mounting frame is inclined, and the tool is connected to the mounting frame by screws.

[0025] Through the above solution, the top surface of the mounting frame is inclined. Thus, when the tool is installed on the mounting frame, it will form an angle with the horizontal plane, which is convenient for cutting the EVA film.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The present invention solves the problem that when a tool cuts an embossed EVA film, the grooves generated by the embossing cause the wear amount of the tool to be uncertain, making it inconvenient to master the tool replacement time, and further affecting the trimming quality of the EVA film. By setting a transmission component, the transmission belt transmits the power of the embossing cooling device to the transmission rod, which drives the mounting wheel to rotate through the transmission rod, and then drives the slider to slide up and down. When the slider slides up and down, it drives the tool to move up and down. During the up and down movement of the tool, the contact position between the tool and the EVA film changes, thus achieving uniform wear of the tool, effectively improving the cutting quality of the EVA film, and at the same time, the uniform wear of the tool effectively extends the service life of the tool.

[0028] 2. By setting an installation frame with an inclined top, the tool is inclined after installation. The inclined setting of the tool extends the contact area between the tool and the cutting surface of the EVA film, effectively improving the cutting effect. At the same time, the side surface of the tool is in the same plane as the fixed frame, which facilitates adjusting the distance between the two side tools through the position of the lock, and thus facilitates cutting the EVA film.

[0029] 3. By setting an air flow component, during the cutting process, debris is easily generated in the grooves and protrusions of the EVA film. Through the up and down swing of the slider, the longitudinal airbag and the transverse airbag are alternately squeezed. The air flow generated by the longitudinal airbag and the transverse airbag acts on the tool. On the one hand, it effectively removes the debris generated during the cutting process, and on the other hand, it can cool the EVA film, accelerating the cooling and hardening of the EVA film to ensure the hardness of the EVA film when it contacts the tool and improve the cutting effect of the EVA film. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0031] Figure 2 is of the present invention Figure 1 an enlarged schematic diagram of part A;

[0032] Figure 3 is a schematic structural diagram of the bracket and the carriage part of the present invention;

[0033] Figure 4 is a schematic structural diagram of the transmission component part of the present invention;

[0034] Figure 5 is a schematic structural diagram of the air flow component part of the present invention;

[0035] Figure 6 is a schematic structural diagram of the longitudinal airbag part of the present invention;

[0036] Figure 7 is a schematic structural diagram of the transverse airbag part of the present invention;

[0037] Figure 8 This is a schematic diagram of the state after the tool of the present invention moves downward.

[0038] In the figure: 1. Outer shell; 2. Extrusion device; 3. Embossing and cooling device; 4. Rewinding device; 5. Bracket; 501. Base; 502. Support plate; 6. Guide rod; 7. Slide carriage; 701. Lock; 702. Fixed frame; 8. Transmission assembly; 801. Transmission rod; 8011. Notch; 802. Driving gear; 8021. Block; 803. Driven gear; 804. Mounting wheel; 805. Connecting rod; 806. Slide block; 807. Mounting frame; 9. Tool; 10. Airflow assembly; 1001. Longitudinal airbag; 10011. Fixed plate; 10012. First airbag body; 10013. Movable plate; 10014. Air hole; 1002. Transverse airbag; 10021. Positioning plate; 10022. Second airbag body; 10023. Moving plate; 10024. Spray hole; 1003. Pressing plate; 1004. Adjusting strip; 1005. Guide post; 11. EVA film. Specific embodiments

[0039] Next, with reference to the accompanying drawings of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described, making its working state and structural features more detailed. Obviously, the described embodiments are only partial embodiments of the present invention, not complete embodiments. Based on the embodiments of the present invention, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 8 , the present invention provides an automated production system for EVA film, and the technical solution is as follows:

[0041] Specifically, please refer to Figures 1 to 8, an EVA film automatic production system, comprising a housing 1, an extrusion device 2, a embossing and cooling device 3 and a winding device 4. The extrusion device 2 is connected to the right side of the housing 1. Both the embossing and cooling device 3 and the winding device 4 are connected to the inner cavity of the housing 1, and the embossing and cooling device 3 is located on the right side of the winding device 4. The extrusion device 2 extrudes an EVA film 11, and the EVA film 11 is wound around the embossing and cooling device 3 and wound by the winding device 4. It further includes a bracket 5, a guide rod 6, a carriage 7, a transmission assembly 8, a cutter 9 and an air flow assembly 10. The bracket 5 is connected to the front and rear sides of the top of the housing 1. A guide rod 6 is connected between the two brackets 5. The guide rod 6 is slidably connected to the bracket 5. The carriage 7 is sleeved on the outer surface of the guide rod 6. The transmission assembly 8 is connected to the inner cavity of the carriage 7, and the lower end of the transmission assembly 8 extends out of the carriage 7. The cutter 9 is connected to the lower side of the transmission assembly 8. The air flow assembly 10 is connected to the inner cavity of the carriage 7. When the embossing and cooling device 3 conveys the EVA film 11, the transmission assembly 8 drives the cutter 9 to move up and down periodically. When the cutter 9 moves up and down, the air flow assembly 10 generates an air flow acting on the contact surface between the cutter 9 and the EVA film 11.

[0042] By setting the transmission assembly 8, the cutter 9 is connected to the transmission assembly 8. Through the transmission assembly 8, the cutter 9 is driven to swing up and down, thereby changing the contact point between the cutter 9 and the EVA film 11. By changing the contact position between the cutter 9 and the film, the single-point wear of the cutter 9 is avoided, the service life of the cutter 9 is improved. At the same time, the up and down movement of the cutter 9 has a good cutting effect on the EVA film 11, improving the smoothness of the edge of the EVA film 11, and thus improving the quality of the EVA film 11.

[0043] As an embodiment of the present invention, refer to Figure 3 , Figure 5 and Figure 8, the bracket 5 includes a base 501 and a support plate 502. The base 501 is connected to the top of the housing 1, and the base 501 is fixedly connected to the housing 1. The support plate 502 is connected to the top of the base 501, and the support plate 502 is slidably connected to the base 501 in the front and rear directions. The support plate 502 is connected to the side of the base 501 by screws. Through the setting of the screws, the position between the support plate 502 and the base 501 can be fixed. The carriage 7 includes a lock 701 and a fixed frame 702. The lock 701 is sleeved on the circumferential surface of the guide rod 6. A bolt is provided on one side of the lock 701. The tightness of the lock 701 on the guide rod 6 can be controlled by the screw rod. When the lock 701 is in a relaxed state, the position on the surface of the guide rod 6 can be adjusted, thereby adjusting the gap between the two cutting tools 9 to achieve a suitable cutting size for the EVA film 11. When the lock 701 is in a pressed state, the position of the lock 701 is fixed, and then the position of the blade is locked, ensuring the stability during the cutting of the EVA film 11. The fixed frame 702 is connected to the lower end of the carriage 7, and the side of the fixed frame 702 away from the bracket 5 is flush with the side of the lock 701 away from the bracket 5.

[0044] By providing the bracket 5, the bracket 5 is divided into two parts, namely the base 501 and the support plate 502, and the base 501 and the support plate 502 are fixed by screws. Through the detachable design, during use, it is convenient to replace the support plate 502 to adjust the height of the carriage 7. At the same time, it is convenient to disassemble the carriage 7 to adapt to the cutting requirements of different EVA films 11. By setting the side of the fixed frame 702 away from the bracket 5 to be flush with the side of the lock 701 away from the bracket 5, during the process of adjusting the cutting position of the blade on the EVA film 11 by the lock 701, it is convenient to measure the distance to ensure that the cutting size of the EVA film 11 meets the standard, thereby improving the quality of the finished EVA film 11.

[0045] As an implementation manner of the present invention, referring to Figure 4 , Figure 5 and Figure 8, the transmission assembly 8 includes a transmission rod 801, a driving gear 802, a driven gear 803, a mounting wheel 804, a connecting rod 805, a slider 806 and a mounting bracket 807. The transmission rod 801 is connected to the support plate 502, and the transmission rod 801 is rotatably connected to the support plate 502. The front end of the transmission rod 801 extends to the front side of the front support plate 502 and is connected to the embossing and cooling device 3 through a transmission belt. The rotating shaft of one of the rotating rollers in the embossing and cooling device 3 extends out of the front end, and this rotating roller is connected to the transmission rod 801 through a transmission belt. When this transmission roller rotates, it will drive the transmission rod 801 to rotate. The driving gear 802 is connected to the upper end of the inner cavity of the fixed bracket 702, and the driving gear 802 is rotatably connected to the inner cavity of the fixed bracket 702. The driven gear 803 is meshed and connected to the lower side of the driving gear 802 and is rotatably connected to the inner cavity of the carriage 7. When the driving gear 802 rotates, it will drive the driven gear 803 to rotate. The mounting wheel 804 is connected to the side of the driven gear 803 away from the support plate 502, and there is frictional transmission between the mounting wheel 804 and the driven gear 803. When the thickness of the EVA film 11 is less than the specified value, when the cutter 9 moves upward to cut the EVA film 11, the resistance generated by the EVA film 11 is small. The transmission ratio of the driven gear 803 to the mounting wheel 804 is high, and the rotation speed of the mounting wheel 804 is fast. Furthermore, the upward movement speed of the cutter 9 is fast, and the EVA film 11 can be effectively cut. When the thickness of the EVA film 11 is greater than the specified value, when the cutter 9 moves upward to cut the EVA film 11, the resistance generated by the EVA film 11 is large. At this time, if the moving speed of the cutter 9 is fast, it will cause a large upward stress on the EVA film 11, resulting in pulling on the edge of the EVA film 11 and causing the edge of the EVA film 11 to extend. By setting the frictional transmission between the mounting wheel 804 and the driven gear 803, when the resistance of the EVA film 11 is large, the transmission ratio of the driven gear 803 to the mounting wheel 804 decreases, and the rotation speed of the mounting wheel 804 is slow. Furthermore, the upward movement speed of the cutter 9 is slow, thereby reducing the upward stress generated by the upward movement of the cutter 9 on the EVA film 11. Furthermore, when the cutter 9 moves upward, the cutting direction of the thinner EVA film 11 when being stressed and cut is mainly upward, which is convenient for cutting, while the cutting direction of the thicker EVA film 11 when being stressed and cut is horizontal, which is convenient for protecting the EVA film 11. One end of the connecting rod 805 is connected to the side of the mounting wheel 804 away from the support plate 502, and the connecting rod 805 is rotatably connected to the mounting wheel 804. The slider 806 is connected to the other end of the connecting rod 805, and the slider 806 is rotatably connected to the connecting rod 805. The mounting bracket 807 is connected to the lower side of the slider 806, and the mounting bracket 807 is connected to the slider 806 by screws. The lower side of the slider 806 passes through the fixed bracket 702, and the slider 806 is slidably connected to the fixed bracket 702, and the sliding direction between the slider 806 and the fixed bracket 702 is vertical. The connection point of the connecting rod 805 and the mounting wheel 804 deviates from the axis of the mounting wheel 804.When the mounting wheel 804 rotates, it will drive one end of the transmission rod 801 to swing in a circular motion. The surface of the transmission rod 801 is provided with notches 8011 at equal angles. One side of the notch 8011 is arc-shaped. A block 8021 is connected to the inner wall of the driving gear 802. The block 8021 is adaptively clamped with the notch 8011. The notch 8011 is arranged in an arc shape. During the rotation process, the contact area with the block 8021 can be increased, thereby reducing the stress on the surface of the block 8021, effectively improving the service life of the block 8021 and the notch 8011. At the same time, during the rotation process of the arc surface of the notch 8011, it is convenient to throw out debris to ensure the smooth sliding of the block 8021 in the notch 8011. At the same time, the arrangement of the notch 8011 and the slider 806 enables the locking buckle 701 to move forward and backward, and the driving gear 802 can adaptively adjust its position. The cutter 9 is installed on the mounting frame 807. The side of the cutter 9 away from the support plate 502 and the side of the fixed frame 702 away from the support plate 502 are in the same plane. Therefore, the distance between the two cutters 9 can be adjusted based on the side of the fixed frame 702 away from the support plate 502, which is convenient for adjustment.,

[0046] By setting the transmission assembly 8, notches 8011 are opened on the surface of the transmission rod 801, and a block 8021 is connected to the inner surface of the driving gear 802. The main gear is connected to the transmission rod 801 through the block 8021, and the driving gear 802 can only slide back and forth on the surface of the transmission rod 801. Therefore, when the transmission rod 801 rotates, it can drive the driving gear 802 to rotate. The driving gear 802 can drive the mounting wheel 804 to rotate through the driven gear 803. Since the connection point of the connecting rod 805 and the mounting wheel 804 deviates from the axis of the mounting wheel 804, the mounting wheel 804 can drive the slider 806 to move up and down through the connecting rod 805 during the rotation process, thereby adjusting the position of the cutter 9. By changing the cutting position of the cutter 9 on the EVA film 11, the single-point wear of the cutter 9 is avoided, and the service life of the cutter 9 is extended by evenly distributing the wear amount.

[0047] As an implementation manner of the present invention, refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 8, the air flow assembly 10 includes a longitudinal airbag 1001, a transverse airbag 1002, a pressing plate 1003, an adjusting strip 1004 and a guide post 1005. The longitudinal airbag 1001 and the transverse airbag 1002 are both connected to the inner cavity of the fixing frame 702, and the transverse airbag 1002 is located on the left side of the longitudinal airbag 1001. The pressing plate 1003 is connected to the right side of the slider 806, and the pressing plate 1003 is fixedly connected to the slider 806. The adjusting strip 1004 is connected to the left side of the slider 806, and the adjusting strip 1004 is fixedly connected to the slider 806. The guide post 1005 is connected to the left side of the rear end of the transverse pressing plate 1003. The adjusting strip 1004 is inclined. When the slider 806 drives the adjusting strip 1004 to move upward, the adjusting strip 1004 contacts the guide post 1005. When the slider 806 drives the pressing plate 1003 to move downward, the pressing plate 1003 applies pressure to the top of the longitudinal airbag 1001. The longitudinal airbag 1001 includes a fixing plate 10011, a first airbag body 10012 and a movable plate 10013. The fixing plate 10011, the first airbag body 10012 and the movable plate 10013 are arranged in sequence from bottom to top. The fixing plate 10011 is fixedly connected to the inner cavity of the fixing frame 702. An air hole 10014 is opened on the lower side of the fixing plate 10011. The longitudinal section of the air hole 10014 is trapezoidal in reverse. Furthermore, when the air hole 10014 exhausts air, the air flow can be gathered, thereby improving the effect of removing debris. When the tool 9 moves up and down, the top view projection of the effective contact length with the EVA film 11 is a. The distance value between the left and right ends of the air hole 10014 is greater than a. Furthermore, when the tool 9 moves, the air hole 10014 can still maintain the blowing force on the tool 9. The transverse airbag 1002 includes a positioning plate 10021, a second airbag body 10022 and a moving plate 10023. The positioning plate 10021, the second airbag body 10022 and the moving plate 10023 are connected in sequence from right to left. The positioning plate 10021 is fixedly connected to the middle of the inner cavity of the fixing frame 702. The guide post 1005 is connected to the moving plate 10023. An injection hole 10024 is opened on the lower side of the inner cavity of the positioning plate 10021. The injection hole 10024 is inclined. The axis of the injection hole 10024 coincides with the center line of the tool 9 in the front view. Furthermore, the air flow from the injection hole 10024 will act on the diversion, and the air flow can flow along the surface of the tool 9, effectively improving the cleaning effect on the surface of the tool 9. The top surface of the mounting frame 807 is inclined. The tool 9 is connected to the mounting frame 807 by screws.

[0048] By setting the air flow component 10, when the slider 806 moves downward, it will drive the pressing plate 1003 to move downward. The downward movement of the pressing plate 1003 will apply pressure to the movable plate 10013, causing the gas in the first bladder 10012 to be discharged through the air holes 10014. At this time, the cutter 9 is in the downward movement stage. Since the downward movement speed of the cutter 9 is relatively fast, the cutter 9 withdraws from the tangent point with the EVA film 11. Then, the long strip-shaped air flow generated by the air holes 10014 will clean the area between the EVA film 11 and the cutter 9 on a large scale. At the same time, the air flow acts on the EVA film 11, thereby realizing the cooling of the EVA film 11, making the EVA film 11 further hardened and facilitating cutting. When the slider 806 moves upward, the cutter 9 is in the upward movement stage. At this time, the cutter 9 will start to contact the cutting surface of the EVA film 11. At the same time, the cut cutter 9 is exposed during the upward movement. The air flow ejected from the spray holes 10024 acts on the cutter 9. Since the axis of the spray holes 10024 coincides with the center line of the cutter 9 in the front view, the air flow will flow along the cutter 9, realizing effective chip removal of the cutter 9 and cooling the cutter 9 at the same time.

[0049] When cutting the embossed EVA film 11, since the position where the cutter 9 contacts the EVA film 11 is single, when the cutter 9 cuts the EVA film 11 for a long time, it is easy to cause a notch on the surface of the cutter 9. The existence of the notch will affect the cutting effect of the EVA film 11, resulting in poor trimming quality of the EVA film 11. In the present invention, by setting the transmission component 8, the fixed cutter 9 is changed to be movable, and the long-term contact with a single point of the EVA film 11 is avoided through the movement of the cutter 9, thereby extending the service life of the cutter 9 and ensuring the cutting effect of the EVA film 11 at the same time. During the cutting process of the EVA film 11, the embossing of the EVA film 11 makes it easy to generate debris during cutting. The debris accumulates on the contact surface between the cutter 9 and the EVA film 11, which is likely to cause poor cutting effect at the edge of the EVA film 11. When the slider 806 drives the cutter 9 to move up and down, it will squeeze the air flow component 10, causing the air flow component 10 to generate an air flow that continuously acts on the cutter 9 to avoid the accumulation of debris, thereby ensuring the cutting effect of the cutter 9 on the EVA film 11;

[0050] To avoid the notch of the tool 9 caused by the long-term single-point contact between the tool 9 and the EVA film 11, a transmission component 8 is provided. The tool 9 is connected to the transmission component 8, and the transmission component 8 drives the tool 9 to move up and down periodically, thereby achieving the purpose of changing the cutting position of the tool 9 on the EVA film 11. Specifically, by setting the transmission rod 801, the power of the embossing and cooling device 3 is transmitted to the transmission rod 801 through the transmission belt. The rotation of the transmission rod 801 drives the rotation of the driving gear 802 through the block 8021. The driving gear 802 drives the rotation of the mounting wheel 804 through the driven gear 803. The connection position of the connecting rod 805 and the mounting wheel 804 deviates from the axis of the mounting wheel 804. Therefore, one end of the connecting rod 805 makes a circular motion. When the connecting rod 805 rotates, the slider 806 slides up and down. The tool 9 is connected to the lower end of the slider 806 through the mounting bracket 807. Therefore, the tool 9 moves up and down. When the tool 9 moves up, the inclined tool 9 contacts the EVA film 11. As the tool 9 moves up, the cutting edge of the inclined tool 9 cuts the EVA film 11 from top to bottom. The position of the tool 9 on the EVA film 11 changes, so that the surface of the tool 9 is evenly worn, effectively extending the service life of the tool 9. At the same time, the upward movement of the tool 9 improves the cutting quality of the tool 9 on the film. When the tool 9 moves down, due to the relatively fast downward movement speed of the tool 9, the tool 9 will separate from the tangent point of the EVA film 11;

[0051] To avoid debris accumulation on the tool 9 or the EVA film 11 caused by the contact between the concave-convex texture on the surface of the embossed EVA film 11 and the tool 9, by setting the air flow assembly 10, when the slider 806 drives the tool 9 to move up and down, the air flow assembly 10 will be squeezed, causing the air flow assembly 10 to generate an air flow acting on the tool 9, thereby removing the debris on the surface of the tool 9, so as to ensure the cutting effect of the tool 9. Specifically, when the connecting rod 805 drives the slider 806 to move downward, the tool 9 moves downward, and the inclined cutting edge of the tool 9 moves leftward on the plane generated by the EVA film 11, so that the cutting edge does not directly contact the EVA film 11. At this time, a distance is formed between the cutting edge of the tool 9 and the EVA film 11. The downward movement of the slider 806 will drive the pressing plate 1003 to squeeze the movable plate 10013, causing the first bladder 10012 to contract, and the gas in the inner cavity of the first bladder 10012 is extruded. The gas passes through the air holes 10014 and acts on the contact surface between the EVA film 11 and the tool 9. The long strip-shaped air flow generated by the air holes 10014 will clean the area between the EVA film 11 and the tool 9 on a large scale. The cutting edge does not directly contact the EVA film 11, which is convenient for the air flow to pass through the cutting edge of the tool 9, thereby improving the chip removal effect of the air flow on the cutting point of the EVA film 11. At the same time, the air flow acts on the EVA film 11, thereby realizing the cooling of the EVA film 11, making the EVA film 11 further hardened and facilitating cutting. When the carriage 7 moves upward, the tool 9 moves upward to contact the cutting point of the EVA film 11 and starts to cut the EVA film 11. The upward movement of the carriage 7 will drive the adjusting bar 1004 to squeeze the guide post 1005, and the guide post 1005 drives the moving plate 10023 to approach the positioning plate 10021, so that the gas in the second bladder 10022 is ejected through the spray holes 10024 and acts on the tool 9. The spray holes 10024 are arranged facing the tool 9, and the axis of the spray holes 10024 coincides with the center line of the tool 9 in the front view, so that the air flow will flow along the tool 9, effectively avoiding the adhesion of debris on the tool 9 during cutting. Through the up and down movement of the slider 806, the longitudinal bladder 1001 and the transverse bladder 1002 blow air alternately, thereby avoiding debris accumulation and effectively ensuring the cutting effect of the tool 9 on the EVA film 11;

[0052] When cutting the thin film, a resistance will be generated between the cutter 9 moving upward and the EVA thin film 11. When the EVA thin film 11 is relatively thin, a certain resistance will cause the EVA thin film 11 to be tightened between the cutter 9, which is convenient for cutting. However, when the EVA thin film 11 is relatively thick, the resistance generated between the cutter 9 and the EVA thin film 11 is relatively large. At this time, if the upward movement speed of the cutter 9 is relatively fast, it will cause a relatively large upward stress on the EVA thin film 11, resulting in pulling on the edge of the EVA thin film 11, and the edge of the EVA thin film 11 is prone to extension. By setting the installation wheel 804 and the driven gear 803 to be friction-driven, when the resistance of the EVA thin film 11 is relatively large, the transmission ratio of the driven gear 803 to the installation wheel 804 decreases, and the rotation speed of the installation wheel 804 is relatively slow. Furthermore, the upward movement speed of the cutter 9 is relatively slow, thereby reducing the upward stress generated by the upward movement of the cutter 9 on the EVA thin film 11, and thus ensuring the cutting effect on the relatively thick EVA thin film 11.

[0053] Although the embodiments of the present invention have been described, for those of ordinary skill in the art, under the understanding of the principles and spirit of the present invention, the embodiments can be changed and modified to obtain other effects, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An EVA film automated production system, comprising a housing (1), an extruder (2), an embossing cooling device (3) and a winding device (4), wherein the extruder (2) is connected to the right side of the housing (1), the embossing cooling device (3) and the winding device (4) are both connected to the inner cavity of the housing (1), and the embossing cooling device (3) is located on the right side of the winding device (4), the extruder (2) extrude an EVA film (11), and the EVA film (11) is wound around the embossing cooling device (3) and is wound by the winding device (4), characterized in that: The invention also comprises a bracket (5), a guide rod (6), a slide (7), a transmission assembly (8), a tool (9) and an airflow assembly (10); the two brackets (5) are respectively connected to the front and rear sides of the top of the shell (1); a guide rod (6) is connected between the two brackets (5); the slide (7) is sleeved on the outer surface of the guide rod (6); the transmission assembly (8) is connected to the inner cavity of the slide (7), and the lower end of the transmission assembly (8) extends out of the slide (7); the tool (9) is connected to the lower side of the transmission assembly (8); the airflow assembly (10) is connected to the inner cavity of the slide (7); when the embossing cooling device (3) transports the EVA film (11), the transmission assembly (8) drives the tool (9) to move up and down periodically; when the tool (9) moves up and down, the airflow assembly (10) generates an airflow to act on the contact surface between the tool (9) and the EVA film (11).

2. The EVA film automated production system according to claim 1, characterized in that: The bracket (5) comprises a base (501) and a support plate (502), wherein the base (501) is connected to the top of the housing (1), and the support plate (502) is connected to the top of the base (501), and the support plate (502) and the base (501) are connected via screws.

3. The EVA film automated production system according to claim 2, characterized in that: The slide (7) comprises a lock buckle (701) and a fixing frame (702), wherein the lock buckle (701) is sleeved on the circumferential surface of the guide rod (6), and the fixing frame (702) is connected to the lower end of the slide (7), and a side of the fixing frame (702) away from the bracket (5) is flush with a side of the lock buckle (701) away from the bracket (5).

4. The EVA film automated production system according to claim 3, characterized in that: The transmission assembly (8) comprises a transmission rod (801), a driving gear (802), a driven gear (803), a mounting wheel (804), a connecting rod (805), a slider (806) and a mounting frame (807); the transmission rod (801) penetrates and extends to the front side of the support plate (502), and is connected to the embossing cooling device (3) through a transmission belt; the driving gear (802) is connected to the upper end of the inner cavity of the fixing frame (702); the driven gear (803) is meshed with the lower side of the driving gear (802) and is connected to the inner cavity of the sliding frame (7); The mounting wheel (804) is connected to the side of the driven gear (803) away from the support plate (502), one end of the connecting rod (805) is connected to the side of the mounting wheel (804) away from the support plate (502), the slider (806) is connected to the other end of the connecting rod (805), the mounting frame (807) is connected to the lower side of the slider (806), the lower side of the slider (806) passes through the fixing frame (702), and the connection point between the connecting rod (805) and the mounting wheel (804) deviates from the axis of the mounting wheel (804).

5. The EVA film automated production system according to claim 4, characterized in that: The surface of the transmission rod (801) is provided with slots (8011) at equal angles, one side of the slot (8011) is arc-shaped, the inner wall of the driving gear (802) is connected with a block (8022), and the block (8022) is adapted to be snap-fitted with the slot (8011).

6. The EVA film automated production system according to claim 4, characterized in that: The tool (9) is mounted on the mounting frame (807), and a side of the tool (9) away from the support plate (502) and a side of the fixing frame (702) away from the support plate (502) are in the same plane.

7. The EVA film automated production system according to claim 5, characterized in that: The airflow component (10) comprises a longitudinal airbag (1001), a transverse airbag (1002), a pressure plate (1003), an adjustment strip (1004) and a guide column (1005); the longitudinal airbag (1001) and the transverse airbag (1002) are both connected to the inner cavity of the fixing frame (702), and the transverse airbag (1002) is located on the left side of the longitudinal airbag (1001); the pressure plate (1003) is connected to the right side of the slider (806); the adjustment strip (1004) is connected to the left side of the slider (806); the guide column (1005) is connected to the left side of the rear end of the transverse pressure plate (1003); the adjustment strip (1004) is arranged to be inclined; when the slider (806) drives the adjustment strip (1004) to move upward, the adjustment strip (1004) contacts the guide column (1005).

8. An EVA film automated production system according to claim 7, characterized in that: The longitudinal airbag (1001) comprises a fixed plate (10011), a first bag body (10012) and a movable plate (10013), wherein the fixed plate (10011), the first bag body (10012) and the movable plate (10013) are arranged in sequence from bottom to top, the fixed plate (10011) is fixedly connected to the inner cavity of the fixed frame (702), an air hole (10014) is provided on the lower side of the fixed plate (10011), and the longitudinal cross-section of the air hole (10014) is in an inverted trapezoidal shape, and the top projection of the effective contact length of the tool (9) with the EVA film (11) when moving up and down is a, and the distance between the left and right ends of the air hole (10014) is greater than a.

9. The EVA film automated production system according to claim 8, characterized in that: The transverse airbag (1002) comprises a positioning plate (10021), a second bag body (10022) and a movable plate (10023), wherein the positioning plate (10021), the second bag body (10022) and the movable plate (10023) are connected in sequence from right to left, the guide column (1005) is connected to the movable plate (10023), a spray hole (10024) is provided on the lower side of the inner cavity of the positioning plate (10021), the spray hole (10024) is inclined, and the axis of the spray hole (10024) coincides with the center line of the tool (9) when viewed from the front.

10. The EVA film automated production system according to claim 6, characterized in that: The top surface of the mounting frame (807) is inclined, and the tool (9) is connected to the mounting frame (807) via screws.

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