Yellowing-resistant hot melt adhesive film slitting and rewinding machine and method

Abstract

The invention relates to an anti-yellowing hot melt adhesive film slitting and rewinding machine and method, and relates to the technical field of hot melt adhesive film cutting, the anti-yellowing hot melt adhesive film slitting and rewinding machine comprises an unwinding system, an unwinding traction system, a cutting system, a floating leveling system and a plurality of winding systems which are arranged in sequence, and the cutting system comprises a reference frame, a cutting sliding beam and a plurality of cutting devices; each cutting device is installed on the cutting sliding beam, each winding system clamps a plurality of rotary winding drums, the floating leveling system comprises a leveling elastic frame and a floating film passing rod, the leveling elastic frame elastically clamps the winding drums, the floating film passing rod is installed on the side, close to the cutting system, of the leveling elastic frame, and a floating film passing seam is formed in the floating film passing rod; an acceleration switch is arranged on the side, close to the cutting system, of the floating film passing rod, the acceleration switch is located on the upper side of the floating film passing seam and electrically connected with the corresponding winding system, the leveling elastic frame is lifted along with increase of the winding diameter in the winding process, and wrinkles caused by too large tension in the whole winding process are stably prevented.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt adhesive film cutting, and in particular to a yellowing-resistant hot melt adhesive film slitting and rewinding machine and method. Background Art

[0002] Yellowing-resistant hot melt adhesive film generally uses TPU hot melt adhesive material as the base material. The main component of TPU hot melt adhesive film is thermoplastic polyurethane (TPU), which has excellent elasticity and flexibility. It can remain stable in extremely harsh environments and is not easy to break or deform.

[0003] It is precisely because TPU hot melt adhesive film is very soft that it is often used in clothing, footwear, electronic products and other fields, and can meet the requirements of these fields for material softness and elasticity. Compared with EVA hot melt adhesive film and PA hot melt adhesive film, TPU hot melt adhesive film is soft and easy to deform. Therefore, during slitting and rewinding, the film is prone to wrinkling and deformation under the action of tension, resulting in rewinding wrinkles.

[0004] The existing equipment lacks special equipment for rewinding adapted to the soft characteristics of yellowing-resistant hot-melt adhesive film. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a yellowing-resistant hot-melt adhesive film slitting and rewinding machine and method, which can stably prevent wrinkles caused by excessive tension during the entire rewinding process.

[0006] The technical solution adopted by the present invention is: A yellowing-resistant hot melt adhesive film slitting and rewinding machine comprises an unwinding system, an unwinding traction system, a cutting system, a floating leveling system and a plurality of winding systems which are arranged in sequence. The cutting system comprises a reference frame, a cutting sliding beam and a plurality of cutting devices. The cutting sliding beam is installed between the unwinding traction system and the winding system. Each of the cutting devices can be slidably installed on the cutting sliding beam. The reference frame has a fixed film-passing seam, and the height of the fixed film-passing seam is lower than that of each cutting device. Each of the winding systems clamps a plurality of rotating winding drums. The floating leveling system comprises a leveling elastic frame and a floating film-passing rod. The leveling elastic frame extends toward the cutting system. The leveling elastic frame elastically clamps the winding drum. The floating film-passing rod is installed on the side of the leveling elastic frame close to the cutting system. The floating film-passing rod is provided with a floating film-passing seam. The floating film-passing rod is provided with an acceleration switch on the side of the floating film-passing rod close to the cutting system. The acceleration switch is located on the upper side of the floating film-passing seam. The acceleration switch is electrically connected to the corresponding winding system. The leveling elastic frame is lifted as the winding diameter increases during the winding process.

[0007] Preferably, the unwinding system includes an unwinding frame, an unwinding shaft and an unwinding drum, a rotating inner cylinder is provided in the unwinding drum through a bearing, the unwinding shaft passes through the unwinding inner cylinder, the unwinding shaft passes through the unwinding inner cylinder and is connected by a spline, the unwinding frame has an upwardly arranged unwinding shaft groove, and the unwinding shaft is placed in the unwinding shaft groove.

[0008] Preferably, the unwinding traction system comprises an unwinding traction device and a pre-pressing device, the pre-pressing device is installed on the unwinding traction device, the unwinding traction device and the pre-pressing device are arranged relative to each other, and the pre-pressing device has a pre-tightening force directed toward the unwinding traction device.

[0009] Preferably, the unwinding traction device comprises an unwinding traction motor and an unwinding traction roller, and the unwinding traction motor and the unwinding traction roller are connected via a chain transmission.

[0010] Preferably, the pre-stressing device includes a pre-stressing slider, a pre-stressing roller, a pre-stressing guide rod and a pre-stressing lifting cylinder, the pre-stressing guide rod is installed on the unwinding traction device, the pre-stressing slider rises and slides along the pre-stressing guide rod, the pre-stressing roller is rotatably installed on the pre-stressing slider, and the two ends of the pre-stressing lifting cylinder are respectively installed on the top crossbeam of the pre-stressing guide rod and the pre-stressing slider.

[0011] Preferably, the winding system includes a winding roller and a winding motor, the winding roller and the winding motor are connected via a chain transmission, and each winding drum is sleeved and mounted on the winding roller.

[0012] Preferably, the cutting device comprises a cutting slider and a cutting knife, wherein the cutting slider is slidably mounted on a cutting sliding beam, and the cutting knife is mounted on the cutting slider.

[0013] Preferably, the elastic leveling frame comprises a leveling frame body and an elastic sheet, the elastic sheet is mounted on the leveling frame body, and the elastic sheet and the leveling frame body clamp the winding drum.

[0014] The method for slitting and rewinding a yellowing-resistant hot melt adhesive film, using a yellowing-resistant hot melt adhesive film slitting and rewinding machine, comprises the following steps: S1: The cutting device is adjusted to its position on the cutting slide beam, and the winding drum is adjusted to its position on the winding system accordingly; S2: The hot melt adhesive film is passed through the unwinding traction system, the fixed film slit, each cutting device and the floating film slit in sequence until the hot melt adhesive film is wound on the winding drum; S3: Put the floating leveling system on the winding drum; S4: Synchronously start the unwinding traction system and each winding system.

[0015] The beneficial effects of the present invention are: The cutting system includes a reference frame, a cutting sliding beam and a plurality of cutting devices. The cutting sliding beam is installed between the unwinding traction system and the winding system. Each cutting device is slidably installed on the cutting sliding beam. The reference frame has a fixed film-passing seam. The height of the fixed film-passing seam is lower than that of each cutting device, so that the film material is immediately cut by each cutting device after passing through the fixed film-passing seam. Each winding system clamps a plurality of rotating winding drums. The floating leveling system includes a leveling elastic frame and a floating film-passing rod. The leveling elastic frame extends toward the cutting system. The leveling elastic frame elastically clamps the winding drum. The winding drum is sleeved on the winding system so that the winding system drives the winding drum to rotate. The floating film-passing rod is installed on the side of the leveling elastic frame close to the cutting system. The floating film-passing rod is provided with a floating film-passing slit. Under the action of the floating film-passing slit of the floating film-passing rod, the hot-melt adhesive film is flattened to prevent wrinkles during winding, and the flattening elastic frame dynamically balances the tension, and stably prevents wrinkles caused by excessive tension during the entire winding process. The flattening elastic frame is not fixedly installed and can be conveniently removed at any time for use in other winding systems. In order to facilitate the winding of film materials of various widths, multiple flattening elastic frames can be prepared on the premise of different masses and even different widths but the same structure, so as to quickly select a suitable flattening elastic frame according to the width requirements of the film material. In order to control the tension, the mass and center of gravity of the flattening elastic frame can be controlled by adsorbing magnets, thereby controlling the tension of the film material.

[0016] An acceleration switch is provided on the side of the floating film rod close to the cutting system, and the acceleration switch is located on the upper side of the floating film seam. The acceleration switch is electrically connected to the corresponding winding system. The flattening elastic frame rises as the winding diameter increases during the winding process. The flattening elastic frame is always pressed on the film material during the winding process to ensure that the film material will not wrinkle during the entire winding process. After the tension of the film material decreases, the flattening elastic frame rotates downward until the film material presses the acceleration switch. The acceleration switch controls the winding system to accelerate, thereby increasing the tension of the film material and causing the flattening elastic frame to rotate upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of point B in the middle.

[0020] Figure 4 This is a cross-sectional schematic diagram of the floating leveling system.

[0021] Figure 5 for Figure 4 Enlarged schematic diagram at point C in the middle.

[0022] Figure 6 for Figure 4 The center C is an enlarged schematic diagram of the film material being pressed against the acceleration switch.

[0023] Description of reference numerals: 1. Unwinding system; 11. Unwinding rack; 12. Unwinding shaft; 13. Unwinding drum; 2. Unwinding traction system; 21. Unwinding traction device; 211. Unwinding traction motor; 212. Unwinding traction roller; 22. Pre-pressing device; 221. Pre-pressing slider; 222. Pre-pressing roller; 223. Pre-pressing guide rod; 224. Pre-pressing lifting cylinder; 3. Cutting system; 31. Reference frame; 311. Fixed film seam; 32. Cutting sliding beam; 33. Cutting device; 331. Cutting slider; 332. Cutting knife; 4. Floating leveling system; 41. Leveling elastic frame; 411. Leveling frame body; 412. Elastic sheet; 42. Floating film rod; 421. Floating film seam; 5. Winding system; 51. Winding drum; 52. Winding motor; 6. Membrane material; 7. Acceleration switch. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 — Figure 6As shown, the present embodiment provides a yellowing-resistant hot melt adhesive film slitting and rewinding machine, comprising an unwinding system 1, an unwinding traction system 2, a cutting system 3, a floating leveling system 4 and a plurality of winding systems 5 which are arranged in sequence, the cutting system 3 comprising a reference frame 31, a cutting sliding beam 32 and a plurality of cutting devices 33, the cutting sliding beam 32 being installed between the unwinding traction system 2 and the winding system 5, each cutting device 33 being slidably installed on the cutting sliding beam 32, the reference frame 31 having a fixed film-passing seam 311, the height of the fixed film-passing seam 311 being lower than that of each cutting device 33 so that the film material 6 is immediately cut by each cutting device 33 after passing through the fixed film-passing seam 311, each winding system 5 clamps a plurality of rotating winding drums 51, the winding drums 51 are sleeved on the winding system 5 so that the winding system 5 drives the winding drums 51 to rotate, the floating leveling system 4 comprises a leveling elastic frame 41 and a floating film-passing rod 42, the leveling elastic frame 41 is directed to the cutting system 3, the leveling elastic frame 41 elastically clamps the winding drum 51, and the floating film rod 42 is installed on the side of the leveling elastic frame 41 close to the cutting system 3. The floating film rod 42 is provided with a floating film slit 421. Under the action of the floating film slit 421 of the floating film rod 42, the hot melt adhesive film is leveled to prevent wrinkles during winding, and the leveling elastic frame 41 dynamically balances the tension, and stably prevents wrinkles caused by excessive tension during the whole winding process. The leveling elastic frame 41 is not fixedly installed and can be conveniently removed at any time and taken to other winding systems 5 for use. In order to facilitate the winding of film materials 6 of various widths, a plurality of leveling elastic frames 41 can be prepared under the premise of different masses and even different widths but the same structure, so as to quickly select a suitable leveling elastic frame 41 according to the width requirements of the film material 6. In order to control the tension, the mass and center of gravity of the leveling elastic frame 41 can be controlled by adsorbing magnets, thereby controlling the tension of the film material 6.

[0025] An acceleration switch 7 is provided on the side of the floating film rod 42 close to the cutting system 3, and the acceleration switch 7 is located on the upper side of the floating film seam 421. The acceleration switch 7 is electrically connected to the corresponding winding system 5. The leveling elastic frame 41 is lifted as the winding diameter increases during the winding process. The leveling elastic frame 41 is always pressed on the film material 6 during the winding process to ensure that the film material 6 will not wrinkle during the entire winding process. After the tension of the film material 6 is reduced, the leveling elastic frame 41 rotates downward until the film material 6 presses the acceleration switch 7. The acceleration switch 7 transmits an electrical signal to the 51 series single-chip microcomputer, and the 51 series single-chip microcomputer controls the winding system 5 to accelerate. This is a prior art and will not be repeated here, thereby increasing the tension of the film material 6 and causing the leveling elastic frame 41 to rotate upward.

[0026] Specifically, the unwinding system 1 includes an unwinding frame 11, an unwinding shaft 12 and an unwinding drum 13. A rotating inner cylinder is provided in the unwinding drum 13 through a bearing. The unwinding shaft 12 passes through the unwinding inner cylinder. The unwinding shaft 12 passes through the unwinding inner cylinder and is connected by a spline. The unwinding frame 11 has an upwardly arranged unwinding shaft groove. The unwinding shaft 12 is placed in the unwinding shaft groove. The uncut hot melt adhesive film is wound on the unwinding drum 13. The unwinding drum 13 rotates relative to the rotating inner cylinder to achieve unwinding.

[0027] Specifically, the unwinding traction system 2 includes an unwinding traction device 21 and a pre-pressing device 22. The pre-pressing device 22 is installed on the unwinding traction device 21. The unwinding traction device 21 and the pre-pressing device 22 are arranged relatively to each other. The pre-pressing device 22 has a pre-tightening force pointing to the unwinding traction device 21 to ensure that the unwinding traction device 21 has sufficient traction force.

[0028] Specifically, the unwinding traction device 21 includes an unwinding traction motor 211 and an unwinding traction roller 212. The unwinding traction motor 211 and the unwinding traction roller 212 are connected via a chain transmission, thereby achieving traction of the hot melt adhesive film.

[0029] Specifically, the pre-pressing device 22 includes a pre-pressing slider 221, a pre-pressing roller 222, a pre-pressing guide rod 223 and a pre-pressing lifting cylinder 224. The pre-pressing guide rod 223 is installed on the unwinding traction device 21. The pre-pressing slider 221 can be lifted and slid along the pre-pressing guide rod 223. The pre-pressing roller 222 is rotatably installed on the pre-pressing slider 221. The two ends of the pre-pressing lifting cylinder 224 are respectively installed on the top beam of the pre-pressing guide rod 223 and the pre-pressing slider 221. The pre-pressing lifting cylinder 224 controls the pre-pressing pressure between the pre-pressing roller 222 and the unwinding traction device 21 to prevent the hot melt adhesive film from slipping.

[0030] Specifically, the winding system 5 includes a winding roller and a winding motor 52. The winding roller and the winding motor 52 are connected through a chain transmission. Each winding drum 51 is sleeved and installed on the winding roller. The winding motor 52 drives the winding roller to achieve winding.

[0031] Specifically, the cutting device 33 includes a cutting slider 331 and a cutting knife 332. The cutting slider 331 is slidably installed on the cutting sliding beam 32, and the cutting knife 332 is installed on the cutting slider 331. The hot melt adhesive film is cut when passing through the cutting knife 332. The cutting slider 331 slides on the cutting sliding beam 32 to control the cutting position.

[0032] Specifically, the leveling elastic frame 41 includes a leveling frame body 411 and an elastic sheet 412. The elastic sheet 412 is hingedly mounted on the leveling frame body 411. The elastic sheet 412 and the leveling frame body 411 clamp the winding drum 51. A tension spring is provided between the elastic sheet 412 and the leveling frame body 411 to facilitate clamping the winding drum 51. As the hot melt adhesive film of the winding drum 51 is wound more and more, the leveling frame body 411 is lifted up accordingly and maintains the leveling function. As a result, the leveling frame body 411 not only maintains the leveling function but also maintains the tension control function during the whole process of the film material 6 being wound thicker and thicker.

[0033] The method for slitting and rewinding a yellowing-resistant hot melt adhesive film, using a yellowing-resistant hot melt adhesive film slitting and rewinding machine, comprises the following steps: S1: The cutting device 33 is adjusted to a position on the cutting slide beam 32, and the winding drum 51 is correspondingly adjusted to a position on the winding system 5, thereby ensuring that the hot melt adhesive film is wound at a suitable position of the winding drum 51; S2: The hot melt adhesive film is sequentially passed through the unwinding traction system 2, the fixed film slit 311, each cutting device 33 and the floating film slit 421 until the hot melt adhesive film is wound on the winding drum 51 to achieve slitting and winding; S3: placing the floating leveling system 4 on the winding drum 51 to adapt to the increase in the diameter of the winding drum 51 during winding; S4: Synchronously start the unwinding traction system 2 and each winding system 5.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A yellowing-resistant hot melt adhesive film slitting and rewinding machine, characterized in that: The invention comprises an unwinding system, an unwinding traction system, a cutting system, a floating leveling system and several winding systems which are arranged in sequence, wherein the cutting system comprises a reference frame, a cutting sliding beam and several cutting devices, wherein the cutting sliding beam is installed between the unwinding traction system and the winding system, and each of the cutting devices can be slidably installed on the cutting sliding beam, the reference frame has a fixed film-passing seam, and the height of the fixed film-passing seam is lower than that of each cutting device, and each of the winding systems clamps several rotating winding drums, and the floating leveling system comprises a leveling elastic frame and a floating film-passing rod, wherein the leveling elastic frame extends toward the cutting system, and the leveling elastic frame elastically clamps the winding drum, and the floating film-passing rod is installed on the side of the leveling elastic frame close to the cutting system, and a floating film-passing seam is provided on the floating film-passing rod, and an acceleration switch is provided on the side of the floating film-passing rod close to the cutting system, and the acceleration switch is located on the upper side of the floating film-passing seam, and the acceleration switch is electrically connected to the corresponding winding system, and the leveling elastic frame is lifted as the winding diameter increases during the winding process.

2. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The unwinding system includes an unwinding frame, an unwinding shaft and an unwinding drum. A rotating inner drum is provided in the unwinding drum through a bearing. The unwinding shaft passes through the unwinding inner drum. The unwinding shaft passes through the unwinding inner drum and is connected by a spline. The unwinding frame has an upwardly arranged unwinding shaft groove, and the unwinding shaft is placed in the unwinding shaft groove.

3. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The unwinding traction system comprises an unwinding traction device and a pre-pressing device, wherein the pre-pressing device is installed on the unwinding traction device, the unwinding traction device and the pre-pressing device are arranged opposite to each other, and the pre-pressing device has a pre-tightening force directed toward the unwinding traction device.

4. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 3, characterized in that: The unwinding traction device comprises an unwinding traction motor and an unwinding traction roller, and the unwinding traction motor and the unwinding traction roller are connected through a chain transmission.

5. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 3, characterized in that: The pre-stressing device includes a pre-stressing slider, a pre-stressing roller, a pre-stressing guide rod and a pre-stressing lifting cylinder. The pre-stressing guide rod is installed on the unwinding traction device, the pre-stressing slider rises and slides along the pre-stressing guide rod, the pre-stressing roller is rotatably installed on the pre-stressing slider, and the two ends of the pre-stressing lifting cylinder are respectively installed on the top crossbeam of the pre-stressing guide rod and the pre-stressing slider.

6. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The winding system comprises a winding roller and a winding motor. The winding roller is connected to the winding motor through a chain transmission, and each winding drum is sleeved and mounted on the winding roller.

7. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The cutting device comprises a cutting slider and a cutting knife. The cutting slider is slidably mounted on a cutting sliding beam, and the cutting knife is mounted on the cutting slider.

8. The yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The elastic leveling frame comprises a leveling frame body and an elastic sheet, wherein the elastic sheet is mounted on the leveling frame body, and the elastic sheet and the leveling frame body clamp the winding drum.

9. A method for slitting and rewinding a yellowing-resistant hot melt adhesive film, using the yellowing-resistant hot melt adhesive film slitting and rewinding machine according to claim 1, characterized in that: The steps include: S1: The cutting device is adjusted to its position on the cutting slide beam, and the winding drum is adjusted to its position on the winding system accordingly; S2: The hot melt adhesive film is passed through the unwinding traction system, the fixed film slit, each cutting device and the floating film slit in sequence until the hot melt adhesive film is wound on the winding drum; S3: Put the floating leveling system on the winding drum; S4: Synchronously start the unwinding traction system and each winding system.

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