Film cutting equipment

Abstract

The embodiment of the invention discloses film cutting equipment which comprises a base, a movable seat, a punching spring, a cam, a guide part and a cutter, the guide part guides the movable seat to vertically move relative to the base, the cam abuts against the movable seat to drive the movable seat to move upwards, the cam is provided with a sudden change section with the radius suddenly decreased, and the punching spring is vertically connected between the base and the cutter. The cam drives the movable seat to move upwards in the vertical direction, the cutter compresses the punching spring, the movable seat is separated from the cam after the abutting position rotates to the sudden change section, and the elastic force of the punching spring drives the cutter to impact downwards, so that the cutter punches the film. The film punching device has the advantages that the cam rotates, the movable seat moves upwards in the vertical direction to compress the punching spring, and the punching spring generates the elastic force; the movable seat is separated from the cam from the abutting position to the sudden change section, the movable seat vertically impacts downwards, the cutter is driven to apply punching force to punch the film, the film is cut off by the cutter, and the instant explosive resilience force of the punching spring enables the film to be cut off thoroughly and neatly, so that the cut of the film is neat.

Description

Technical Field

[0001] The present invention relates to the field of film cutting technology, and in particular to a film cutting device. Background Art

[0002] In the film cutting equipment, the motor on the equipment drives the cutter back and forth through a reciprocating motion structure, so that the cutter performs reciprocating motion to cut the film in a cyclic manner. In current technology, the equipment is usually equipped with an eccentric wheel, a cam, and a crank slider structure to realize the reciprocating motion of the cutter. For example, in the patent document with publication number CN210438163U, the film cutting equipment uses a cam, and the outer contour of the cam drives the cutter to reciprocate, so that the cutter cuts the film. However, since the radius of the outer contour of the cam gradually increases to form a curved surface, the cutting force of the cam-driven cutter also gradually increases. Therefore, the cutting force of the cutter on the film at the moment of cutting is not ideal, especially when cutting a film with relatively strong toughness, the insufficient cutting force causes the film to be partially or completely unable to be cut. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a film cutting device.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a film cutting device, including a base, a movable seat, a punching spring, a rotating cam, a guide member for guiding the sliding of the movable seat, and a cutter for cutting a film. The guide member guides the vertical movement of the movable seat relative to the base, the cam abuts against the movable seat, driving the movable seat to move upward, the cam is provided with a sudden change section with a sudden decrease in radius, the punching spring is vertically connected between the base and the cutter, and during processing, the cam drives the movable seat to move vertically upward, the cutter compresses the punching spring, and after the abutment turns to the sudden change section, the movable seat disengages from the cam, and the elastic force of the punching spring drives the cutter to impact vertically downward, so that the cutter punches the film.

[0005] Wherein, the punching spring is a compression spring, and the punching spring is located between the top surface of the cutter and the bottom surface of the base.

[0006] Wherein, the base includes a carrier, a support for supporting the carrier, the guide member is a ball guide sleeve, the support member is fixedly connected to the bottom surface of the carrier, the movable seat is located on the upper side of the carrier, the cutter is located on the lower side of the carrier, the fixing member of the guide member is fixedly connected to the base, the upper end of the movable member of the guide member is on the upper side of the carrier and connected to the movable seat, and the lower end of the movable member is connected to the cutter on the lower side of the carrier.

[0007] The movable seat is provided with a first clearance hole. After the abutment portion rotates to the mutation section, the movable seat is separated from the cam and impacts downward, so that a portion of the cam passes through the first clearance hole.

[0008] Wherein, it also includes a contact block, which is connected to the movable seat and located in the middle of the first clearance hole. The cam abuts against the contact block to make the movable seat move vertically upward.

[0009] The side of the cam is provided with a give-way slope, which is located on one side of the mutation section. The give-way slope gradually tilts downward from the highest point toward the turning direction of the cam. When the contact block impacts downward along the mutation section, the contact block is placed and moved on the outside of the give-way slope.

[0010] Wherein, a curved recess is provided on the side of the cam, the curved recess is located on one side of the mutation section, and is arranged toward the turning recess of the cam. When the contact block impacts downward along the mutation section, the contact block is placed and moved on the outside of the curved recess.

[0011] It also includes a tool holder, the cutter is connected to the bottom surface of the tool holder, the lower end of the movable part is connected to the top surface of the tool holder, and the punching spring is sleeved on the movable part and located between the bottom surface of the carrier and the top surface of the tool holder.

[0012] The carrier is provided with a second clearance hole, and the outer contour of the cam passes through the second clearance hole.

[0013] It also includes a hydraulic buffer, the cylinder of which is connected to the carrier, and the piston rod of which is arranged toward the movable seat. After the cutter impacts downward to cut the film, the movable seat abuts against the piston rod.

[0014] The embodiment of the present invention has the following beneficial effects: during processing, the driving motor drives the cam to rotate, and the cam drives the movable seat to gradually move vertically upward through its curved profile, and at the same time, the movable seat compresses the punching spring through the moving part and the cutter, and the moving part is the guide column of the ball guide sleeve, so that the punching spring generates a downward elastic force, and when the abutment between the movable seat and the outer profile of the cam rotates to the sudden change section, the sudden change section has a distance difference in the radial direction of the cam, and the movable seat separates from the cam. At the same time, the distance difference enables the elastic force of the punching spring to drive the movable seat to impact vertically downward, and the punching force applied by the punching spring to the cutter punches the film in a taut state, so that the film is cut by the cutter. Through the above arrangement, the instantaneous explosive rebound force of the punching spring enables the film to be cut cleanly, avoiding the pulling of the film due to the incomplete cutting to produce a defective finished product, and at the same time making the cut of the film neat; The hydraulic buffer acts as a buffer for the cutter that impacts vertically downward. After the cutter impacts downward and cuts the film, the top of the piston rod abuts against the bottom surface of the movable seat. The movable seat drives the piston rod to slide downward. The piston rod slides relative to the cylinder body to produce a damping effect, thereby buffering the vertical movement of the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention; Figure 2 1 is a schematic structural diagram of the first viewing angle of the present invention; Figure 3 1 is a schematic structural diagram of the second viewing angle of the present invention; Figure 4 1 is a schematic structural diagram of the third viewing angle of the present invention; Figure 5 It is a schematic structural diagram of some components of the present invention in a disassembled state; Figure 6 is a front view of the cam of the present invention; Figure 7 is a perspective view of a cam of the present invention; Figure 8 This is a schematic structural diagram of the first viewing angle of the present invention equipped with a material receiving mechanism; Figure 9 This is a schematic structural diagram of the second viewing angle of the present invention equipped with a material receiving mechanism; Figure 10 It is a schematic diagram of the contact block of the present invention passing through the mutation section; Figure 11 yes Figure 10 Enlarged view of area A in the middle; Figure 12 It is a front view of the material receiving mechanism of the present invention.

[0016] In the figure: 11, base; 12, movable seat; 13, cutter; 14, drive motor; 15, cam; 16, guide member; 23, moving member; 24, fixing member; 17, punching spring; 18, sudden change section; 19, highest point; 20, lowest point; 21, carrier; 22, support member; 25, first clearance hole; 26, contact block; 27, curved depression; 28, second clearance hole; 29, crossbeam; 30, short shaft; 31, torque arm member; 32, diamond bearing seat; 33, worm gear reducer Speed machine; 34. Vertical bearing seat; 35. Shaft; 36. Hydraulic buffer; 37. Assembly hole; 38. Piston rod; 39. Cylinder; 40. Tool holder; 42. Film; 43. Smoothing plate; 44. Vertical plate; 81. Base; 82. Assembly plate; 85. First tensioning roller; 86. Second tensioning roller; 87. First receiving roller; 88. Second receiving roller; 89. Swing arm; 90. Film-passing shaft; 91. Aluminum pressure roller; 92. Blowing pipe; 93. Reel lifting device; 94. Giving way inclined plane. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0018] When the existing film cutting equipment cuts the film, the cutter is driven by the eccentric wheel, cam, crank slider structure and other structures to cut the film. Because of the motion characteristics of the reciprocating motion structures such as the eccentric wheel, cam, crank slider structure, the motion characteristics are as follows: for example, the cam uses a gradually changing flange to drive the cutter to move during the movement, and the eccentric wheel and crank slider structure use a gradually changing motion trajectory to drive the cutter to move during the movement, resulting in the acceleration of the cutter in the process of cutting toward the film also having a gradual change, so that the above-mentioned reciprocating motion structure has a smaller driving force on the cutter, which in turn leads to a smaller explosive force when the cutter cuts, resulting in the cutter being unable to completely cut the film.

[0019] In order to overcome the above problems, the present invention provides a device that can apply a cutting force to a film and cut the film in a short stroke. For the convenience of feature description, the present invention is described as follows: Figure 1 The counterclockwise rotation direction of the cam 15 is described as a characteristic, but it cannot be regarded as a limiting condition of the present invention. Figure 1-12 The structure and working principle of the film cutting equipment are described in detail.

[0020] A film cutting device includes: a base 11, a movable seat 12, a cutter 13, a drive motor 14, a cam 15, a guide 16, and a punching spring 17. The base 11 plays a basic supporting role for the film cutting device. The position of the base 11 is fixed, the movable seat 12 is movable, and the movable seat 12 moves vertically relative to the base 11. The cutter 13 is used to cut the film 42. The cutter 13 is a serrated cutter, but the cutter 13 is not limited to a serrated cutter, and can also be a flat-edged cutter. When the cutter 13 cuts the film 42, the cutter 13 moves vertically relative to the base 11. The drive motor 14 is fixedly connected to the base 11. The drive motor 14 drives the cam 15 to rotate. The cam 15 is connected to the bottom of the movable seat 12. The surfaces abut against each other to drive the movable seat 12 to move vertically upward. The outer contour of the cam 15 is provided with a sudden change section 18 with a suddenly reduced radius. The outer contour of the cam 15 presents a G-shaped contour. The rotating end of the drive motor 14 drives the cam 15 to rotate. The curved contour of the cam 15 abuts against the movable seat 12, causing the movable seat 12 to move vertically upward. The fixing member 24 of the guide member 16 is vertically fixed and screwed to the base 11. Specifically, the fixing member 24 is provided in the base 11. The moving member 23 of the guide member 16 is fixedly connected to the movable seat 12 and the cutter 13. The moving member 23 slides vertically on the inner side surface connected to the fixing member 24, so that the guide member 16 guides the vertical reciprocating movement of the movable seat 12. The guide member 16 is a ball guide sleeve. The fixing member 24 of the guide member 16 is fixed to the base 11. The part 24 is a guide sleeve, and the movable part 23 of the guide part 16 is a guide column. The guide column slides vertically on the inner side of the guide sleeve, and also plays a guiding role in the vertical reciprocating movement of the cutter 13. The cutter 13 is fixedly connected to the movable seat 12 through the movable part 23, so that the cutter 13, the movable part 23, and the movable seat 12 can move vertically synchronously. The punching spring 17 is a compression spring. The punching spring 17 is vertically connected between the bottom surface of the base 11 and the top surface of the cutter 13. The direction of the driving force of the punching spring 17 on the cutter 13 is opposite to the driving direction of the cam 15 on the cutter 13. During processing, the drive motor 14 drives the cam 15 to rotate, and the cam 15 drives the movable seat 12 to move vertically upward through its curved profile. At the same time, the movable seat 12 is rotated by the cam 15. The movable part 23 and the cutter 13 compress the punching spring 17, causing the punching spring 17 to generate a downward elastic force. When the abutment between the movable seat 12 and the outer contour of the cam 15 rotates to the mutation section 18, the mutation section 18 has a distance difference in the radial direction of the cam 15. This distance difference enables the elastic force of the punching spring 17 to drive the movable seat 12 to impact vertically downward. The punching force applied by the punching spring 17 to the cutter 13 punches the film 42 in a taut state, so that the film 42 is cut by the cutter 13. Through the above arrangement, the instantaneous explosive rebound force of the punching spring 17 causes the film 42 to be cut cleanly, avoiding the production of defective finished products due to pulling on the film 42 due to uncutting, and at the same time making the cut of the film 42 neat.

[0021] It should be noted that when the cutter 13 cuts the film 42 , the film 42 needs to be stretched to keep the film 42 in a taut state, so as to facilitate the cutter 13 to cut the film 42 .

[0022] The mutation section 18 of the cam 15 is provided with a highest point 19 and a lowest point 20. The radius of the highest point 19 is greater than that of the lowest point 20. After the abutment between the movable seat 12 and the cam 15 rotates to the mutation section 18, the abutment is acted upon by the elastic force of the punching spring 17, and the abutment drops rapidly from the highest point 19 to the lowest point 20. At the same time, the movable seat 12 rapidly drives the cutter 13 to cut the film 42. It should be noted that the radius difference between the highest point 19 and the lowest point 20 is greater than the distance difference from the cutter 13 to the film 42. After the film 42 is cut, the abutment continues to abut against the outer contour of the rotating cam 15. The abutment continues to rotate from the lowest point 20 of the cam 15 to the highest point 19. The radius from the lowest point 20 to the highest point 19 also gradually increases, so that the height of the abutment also gradually increases.

[0023] The base 11 includes a carrier 21 and a support 22. The support 22 is used to support the carrier 21. The carrier 21 is a rectangular flat plate. The support 22 can be a plate or strip. The support 22 of the present invention is a plate. The support 22 is fixedly connected to the bottom surface of the carrier 21, so that the carrier 21 forms a platform structure. The movable seat 12 is on the upper side of the carrier 21 and moves vertically. The cutter 13 is located on the lower side of the carrier 21 and moves vertically under the drive of the cam 15 and the movable seat 12 and cuts the thin film. The film 42 is cut, and on the upper side of the carrier 21, the upper end of the movable member 23 is fixedly connected to the movable seat 12, and on the lower side of the carrier, the lower end of the movable member 23 is fixedly connected to the cutter 13. The fixing member 24 is fixedly connected and penetrates the carrier 21, and the movable member 23 slides vertically on the fixing member 24. The movable seat 12 and the cutter 13 are vertically moved relative to the base 11 by the movable member 23 sliding vertically along the fixing member 24. The guide member 16 guides the vertical movement of the movable seat 12 and the cutter 13.

[0024] The support members 22 of the present invention are provided in two groups. The two groups of support members 22 are spaced apart and fixedly connected to the bottom surface of the carrier 21 . The cutter 13 moves vertically between the space between the two groups of support members 22 .

[0025] A first clearance hole 25 is opened downward on the bottom surface of the movable seat 12. After the contact point between the cam 15 and the movable seat 12 turns to the sudden change section 18, the movable seat 12 impacts downward, and at the same time, part of the cam 15 passes through the first clearance hole 25. The first clearance hole 25 plays a role in giving way for the downward vertical movement of the movable seat 12.

[0026] The present invention also includes a contact block 26, which is threadedly connected to the movable seat 12. Specifically, the contact block 26 is located at the opening of the first clearance hole 25, and the outer contour of the rotating cam 15 abuts against the contact block 26. The movable seat 12 abuts against the outer contour of the cam 15 through the contact block 26. During the process of the contact block 26 abutting against the cam 15 along the outer contour of the cam 15 with a gradually increasing radius, the movable seat 12 is gradually driven vertically upward, and at the same time, the punching spring 17 is compressed, and the elastic potential energy of the punching spring 17 increases.

[0027] The first clearance hole 25 is set in the shape of a long hole, and the contact block 26 spans the middle of the first clearance hole 25 along the direction parallel to the short side of the first clearance hole 25. When the sudden section 18 of the cam 15 rotates to abut against the contact block 26, the movable seat 12 impacts downward. During the downward movement of the movable seat 12, the cam 15 passes through the movable seat 12 through the first clearance hole 25, and the contact block 26 moves at a high speed from the highest point 19 to the lowest point 20. The first clearance hole 25 plays a role in giving way to the downward movement of the movable seat 12.

[0028] like Figure 7 、 11 As shown, the side of the cam 15 is provided with a yield slope 94, which gradually tilts downward and leftward from the highest point 19, that is, the yield slope 94 gradually tilts downward from the highest point toward the turning direction of the cam 15. The abutment point between the cam 15 and the contact block 26 rotates to the highest point 19, and the cutter 13 starts to punch downward. When the contact block 26 impacts downward along the sudden change section 18, the yield slope 94 is located on the left side of the contact block 26, which plays a yielding role for the contact block 26, thereby avoiding friction between the contact block 26 and the side of the cam 15 during the downward movement.

[0029] like Figure 6 、 7 The cam 15 is provided with a curved recess 27, which is recessed from the side of the cam 15. The curved recess 27 is located on the left side of the sudden change section 18, that is, the curved recess 27 is arranged toward the turning recess of the cam 15, and the give way inclined surface 94 gradually tilts to the left from the highest point 19 to the curved recess 27. The abutment point between the cam 15 and the contact block 26 rotates to the highest point 19, and the cutter 13 begins to punch downward. When the contact block 26 impacts downward along the sudden change section 18, it passes through the give way inclined surface 94 and then the curved recess 27. The curved recess 27 plays a giving way role for the movement of the contact block 26 in the sudden change section 18, thereby preventing the contact block 26 from rubbing against the cam 15 during the downward impact driven by the punching spring 17. When the movable seat 12 impacts downward, the contact block 26 moves to the left side of the curved recess 27 to form a give way space.

[0030] A second clearance hole 28 is opened in the middle of the top surface of the carrier plate 21. The second clearance hole 28 is a rectangular hole. Part of the outer contour of the rotating cam 15 is located in the second clearance hole 28 or passes through the second clearance hole 28. The second clearance hole 28 plays a role in giving way to the rotation of the cam 15.

[0031] The base 11 of the present invention also includes a crossbeam 29, which is arranged in a long strip shape. The two groups of supports 22 are arranged at intervals and fixedly connected to the two side edges of the bottom surface of the carrier 21. The two ends of the crossbeam 29 are respectively fixedly connected to the inner side surfaces of the two groups of supports 22. The drive motor 14 is fixedly assembled on the outer side of the crossbeam 29, and the drive motor 14 is fixedly assembled to the base 11 through the crossbeam 29.

[0032] The present invention also includes a worm gear reducer 33. The base 11 of the present invention also includes a short shaft 30, a torque arm 31, and a diamond bearing seat 32. One end of the short shaft 30 is fixedly connected to the cross beam 29, and the other end of the short shaft 30 is fixedly connected to the diamond bearing seat 32. The torque arm 31 is sleeved on the short shaft 30 and is located between the diamond bearing seat 32 and the cross beam 29. The torque arm 31 is fixedly connected to the short shaft 30 and the diamond bearing seat 32. The worm gear reducer 33 is fixedly connected to the outer side surface of the torque arm 31. The above-mentioned arrangement is used to balance the reaction torque generated during the operation of the worm gear reducer 33. The drive motor 14 is fixedly connected to the outer casing of the worm gear reducer 33. The input shaft of the worm gear reducer 33 is axially connected to the rotating shaft of the drive motor 14. The output shaft of the worm gear reducer 33 is axially connected to the cam 15. The drive motor 14 reduces the speed through the worm gear reducer 33 and transmits it to the cam 15.

[0033] The base 11 of the present invention also includes a vertical bearing seat 34 and a shaft member 35. The vertical bearing seat 34 is fixedly screwed to the top surface of the carrier 21. The two groups of vertical bearing seats 34 are respectively located on both sides of the long side of the second clearance hole 28. The output shaft of the worm gear reducer 33 is axially connected to the shaft member 35 to drive the shaft member 35 to rotate. The shaft member 35 is rotatably connected to the two groups of vertical bearing seats 34. The cam 15 rotates coaxially with the shaft member 35. The cam 15 is located between the two groups of vertical bearing seats 34. The rotating shaft member 35 drives the cam 15 to rotate. The shaft member 35 is supported by the two groups of vertical bearing seats 34 to drive the cam 15 to rotate, thereby improving the stability of the rotation of the cam 15. At the same time, the base 11 provides support for the worm gear reducer 33 and the drive motor 14 through the crossbeam member 29, the short shaft 30, the torque arm member 31, the diamond bearing seat 32, and the vertical bearing seat 34, thereby reducing the burden on the shaft member 35.

[0034] The present invention also includes an oil pressure buffer 36 for buffering the vertical movement of the cutter 13 and the movable seat 12. The carrier 21 is provided with an assembly hole 37. The cylinder 39 of the oil pressure buffer 36 is fixedly screwed to the assembly hole 37 of the carrier 21. The piston rod 38 of the oil pressure buffer 36 is arranged toward the movable seat 12. The piston rod 38 and the cylinder 39 are vertically slidably connected. After the cutter 13 impacts downward and cuts the film 42, the rubber cap on the top of the piston rod 38 abuts against the bottom surface of the movable seat 12, and the movable seat 12 is driven. The piston rod 38 slides downward, and the piston rod 38 slides relative to the cylinder body 39 to produce a damping effect, thereby buffering the vertical movement of the cutter 13. It should be noted that when the contact block 26 moves from the highest point 19 to the lowest point 20 in the mutation section 18, the cutter 13 first cuts the film 42, and then the bottom surface of the movable seat 12 abuts against the rubber cap of the piston rod 38. The sliding of the piston rod 38 relative to the cylinder body 39 plays a buffering and damping role in the vertical movement of the cutter 13 and the movable seat 12.

[0035] The present invention also includes a tool holder 40, which includes a flat plate 43 and a vertical plate 44. The vertical plate 44 is vertically connected to the bottom surface of the flat plate 43, and the long side of the flat plate 43 and the long side of the vertical plate 44 are extended in parallel. The tool holder 40 is located on the lower side of the carrier 21, the cutter 13 is fixedly connected to the side of the vertical plate 44, and the lower end of the movable part 23 is fixedly connected to the top surface of the flat plate 43. The punching spring 17 is sleeved on the movable part 23 and is located between the bottom surface of the carrier 21 and the top surface of the flat plate 43. The punching spring 17 abuts against the bottom surface of the carrier 11 and the top surface of the flat plate 43.

[0036] The movable seat 12 is elongated, and the guide members 16 are provided in two groups and are respectively located on both sides of the short sides of the second clearance hole 28. The two guide members 16 are respectively arranged close to the two short sides of the carrier 21. The lower ends of the two movable members 23 are respectively fixedly connected to the top surface of the flat plate 43 and are arranged close to its short sides. The upper ends of the two movable members 23 are respectively fixedly connected to the bottom surface of the movable seat 12 and are arranged close to its two sides.

[0037] The hydraulic buffers 36 are provided in four groups, with two groups of hydraulic buffers 36 respectively provided on both sides of the second clearance hole 28 . The hydraulic buffers 36 are all provided between the second clearance hole 28 and the guide member 16 .

[0038] The present invention also includes a material receiving mechanism for winding the cut film, the material receiving mechanism includes a base 81, an assembly disk 82, a first tensioning roller 85, a second tensioning roller 86, a first tensioning motor, and a second tensioning motor. The assembly disk 82 is assembled with the base 81, the assembly disk 82 is assembled with the base 81, the first tensioning motor drives the first tensioning roller 85 to rotate, the first tensioning motor is fixedly connected to the assembly disk 82, the second tensioning motor drives the second tensioning roller 86 to rotate, and the second tensioning motor is fixedly connected to the assembly disk 8 2 is fixedly connected, the axial direction of the first tensioning roller 85 and the axial direction of the second tensioning roller 86 are parallel to the extension direction of the cutter 13, the rotation directions of the first tensioning roller 85 and the second tensioning roller 86 are opposite, the first tensioning roller 85 and the second tensioning roller 86 are located on the lower side of the cutter 13, the first tensioning roller 85 and the second tensioning roller 86 respectively apply tensioning force to the film 42, tensioning the two film ends of the film 42, so that the film 42 is in a taut state, which facilitates the cutter 13 to cut the film 42.

[0039] The material receiving mechanism also includes a first material receiving roller 87, a second material receiving roller 88, a first material receiving motor, and a second material receiving motor. The first material receiving motor is fixedly connected to the assembly disk 82. The first material receiving motor drives the first material receiving roller 87 to rotate. The second material receiving motor is fixedly connected to the assembly disk 82. The second material receiving motor drives the second material receiving roller 88 to rotate. The axial direction of the first material receiving roller 87 and the axial direction of the second material receiving roller 88 are parallel to the extension direction of the cutter 13. The steering direction of the first material receiving roller 87 and the second material receiving roller 88 is the same. The rolls of the two groups of films 42 are respectively mounted on the first material receiving roller 87 and the second material receiving roller 88. The first material receiving roller 87 and the second material receiving roller 88 respectively drive the two groups of rolls to rotate, so that one roll is unloaded and the other roll is received. After the film 42 is cut, two film heads are generated. One film head is rolled up by the first material receiving roller 87, and the other film head is rolled up into a bundle by the second material receiving roller 88 and the unloading is completed.

[0040] The first receiving roller 87 and the second receiving roller 88 are provided with a roll clamping mechanism so that the rolls can rotate synchronously. The roll clamping mechanism is a prior art and will not be described in detail again.

[0041] The receiving mechanism also includes an indexing motor, which drives the assembly disk 82 to rotate. The indexing motor is fixedly connected to the base 81. The indexing motor drives the assembly disk 82 to rotate, so that the first receiving roller 87 and the second receiving roller 88 are interchanged.

[0042] The material receiving mechanism also includes a swing arm 89 and a film passing shaft 90. The film passing shaft 90 is rotatably connected to the end of the swing arm 89 and is used to compress the film 42. The swing arm 89 is swingably connected to the base 81. The swing axis of the swing arm 89 is parallel to the extension direction of the cutter 13. The swing arm 89 can swing back and forth in the direction of the film 42, and the film passing shaft 90 abuts against the film 42 to further tighten the film 42.

[0043] The swing arm 89 is further provided with a blowing pipe 92 for blowing air to the membrane head.

[0044] The receiving mechanism also includes an aluminum pressure roller 91, which is swingably connected to the base 81. The swing axis of the aluminum pressure roller 91 is set parallel to the extension direction of the cutter 13. The aluminum pressure roller 91 can swing toward the second receiving roller 88 and abut it.

[0045] The material receiving mechanism also includes a roll lifting device 93, which is located on the lower side of the first material receiving roller 87. The roll lifting device 93 sends the roll upward to the first material receiving roller 87. The roll clamping mechanism of the first material receiving roller 87 tightens the roll. The roll lifting device 93 is an existing technology and will not be described in detail here.

[0046] Working principle of the take-up mechanism: After the film 42 is cut by the cutter 13, two film heads are generated. One of the film heads is rolled between the second take-up roller 88 and the aluminum pressure roller 91 under the action of the air blowing pipe 92, and the other film head is rolled into a bundle by the first take-up roller 87. The bundled film 42 and its roll are removed to complete the unloading. At the same time, the paper roll lifting device below sends the empty roll to the center of the first take-up roller 87 and is clamped by the roll clamping mechanism. When the number of rolls on the second take-up roller 88 reaches the set target value, the swing arm 89 swings about 50 degrees in the clockwise direction. °, used to make way for the position interchange of the first receiving roller 87 and the second receiving roller 88, and then the assembly disk 82 rotates 180°, so that the positions of the first receiving roller 87 and the second receiving roller 88 are interchanged, and the swing arm 89 is reset when rotated counterclockwise, so that the film shaft 90 re-tensions the film 42, so that the film 42 is in a tensioned state at both ends again, and at the same time the first tensioning roller 85 and the second tensioning roller 86 tension the film 42, so that the film 42 is in a taut state, which has sufficient conditions for being cut, and then the cutter 13 cuts the film 42 again.

[0047] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any modifications made within the spirit of the main technical solution of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A film cutting device, characterized in that: The invention comprises a base (11), a movable seat (12), a punching spring (17), a rotating cam (15), a guide member (16) for guiding the sliding of the movable seat (12), and a cutter (13) for cutting a film (42). The guide member (16) guides the vertical movement of the movable seat (12) relative to the base (11). The cam (15) abuts against the movable seat (12) to drive the movable seat (12) to move upward. The cam (15) is provided with a sudden change section (18) with a sudden decrease in radius. The punching spring (17) is vertically connected between the base (11) and the cutter (13). During processing, the cam (15) drives the movable seat (12) to move vertically upward, and the cutter (13) compresses the punching spring (17). After the abutment portion turns to the mutation section (18), the movable seat (12) separates from the cam (15), and the elastic force of the punching spring (17) drives the cutter (13) to impact vertically downward, so that the cutter (13) punches the film (42).

2. The film cutting device according to claim 1, characterized in that: The punching spring (17) is a compression spring, and the punching spring (17) is located between the top surface of the cutter (13) and the bottom surface of the base (11).

3. A film cutting device according to claim 1 or 2, characterized in that: The base (11) includes a carrier (21), a support (22) for supporting the carrier (21), the guide member (16) is a ball guide sleeve, the support (22) is fixedly connected to the bottom surface of the carrier (21), the movable seat (12) is located on the upper side of the carrier (21), the cutter (13) is located on the lower side of the carrier (21), the fixing member (24) of the guide member (16) is fixedly connected to the base (11), the upper end of the movable member (23) of the guide member (16) is on the upper side of the carrier (21) and connected to the movable seat (12), and the lower end of the movable member (23) is connected to the cutter (13) on the lower side of the carrier (21).

4. The film cutting device according to claim 1, characterized in that: The movable seat (12) is provided with a first clearance hole (25). After the abutment portion rotates to the mutation section (18), the movable seat (12) is separated from the cam (15) and impacts downward, causing a portion of the cam (15) to pass through the first clearance hole (25).

5. The film cutting device according to claim 4, characterized in that: It also includes a contact block (26), which is connected to the movable seat (12) and is located in the middle of the first clearance hole (25). The cam (15) abuts against the contact block (26) to move the movable seat (12) vertically upward.

6. The film cutting device according to claim 5, characterized in that: The side of the cam (15) is provided with a relief slope (94), and the relief slope (94) is located on one side of the sudden change section (18). The relief slope (94) gradually tilts downward from the highest point (19) toward the direction of the cam (15). When the contact block (26) impacts downward along the sudden change section (18), the contact block (26) is placed and moved on the outside of the relief slope (94).

7. A film cutting device according to claim 5 or 6, characterized in that: A curved recess (27) is provided on the side of the cam (15), and the curved recess (27) is located on one side of the sudden change section (18) and is arranged toward the turning recess of the cam (15). When the contact block (26) impacts downward along the sudden change section (18), the contact block (26) is placed and moved on the outside of the curved recess (27).

8. The film cutting device according to claim 3, characterized in that: The utility model further comprises a knife holder (40), wherein the cutter (13) is connected to the bottom surface of the knife holder (40), the lower end of the movable member (23) is connected to the top surface of the knife holder (40), and the punching spring (17) is sleeved on the movable member (23) and is located between the bottom surface of the carrier (21) and the top surface of the knife holder (40).

9. The film cutting device according to claim 3, characterized in that: The carrier (21) is provided with a second clearance hole (28), and the outer contour of the cam (15) passes through the second clearance hole (28).

10. The film cutting device according to claim 3, characterized in that: It also includes an oil pressure buffer (36), a cylinder body (39) of the oil pressure buffer (36) is connected to the carrier (21), and a piston rod (38) of the oil pressure buffer (36) is arranged toward the movable seat (12). After the cutter (13) impacts downward to cut the film (42), the movable seat (12) and the piston rod (38) abut against each other.

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