A yellowing-resistant hot melt adhesive film slitting and rewinding machine and method

Abstract

The present invention relates to a yellowing-resistant hot melt adhesive film slitting and rewinding machine and method, belonging to the technical field of hot melt adhesive film cutting. It includes a unwind system, an unwind traction system, a cutting system, a floating leveling system and a plurality of rewinding systems arranged in sequence. The cutting system includes a reference frame, a cutting sliding beam and a plurality of cutting devices. Each cutting device is installed on the cutting sliding beam. Each rewinding system holds a plurality of rotating rewinding drums. The floating leveling system includes a leveling elastic frame and a floating film-passing rod. The leveling elastic frame elastically clamps the rewinding drum. The floating film-passing rod is installed on the side of the leveling elastic frame close to the cutting system. A floating film-passing slit is provided on the floating film-passing rod. An acceleration switch is provided on the side of the floating film-passing rod close to the cutting system. The acceleration switch is located above the floating film-passing slit. The acceleration switch is electrically connected to the corresponding rewinding system. The leveling elastic frame lifts as the rewinding diameter increases during the rewinding process, and stably prevents wrinkles caused by excessive tension throughout the rewinding process.

Description

Technical Field

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

[0002] The yellowing-resistant hot melt adhesive film generally uses TPU hot melt adhesive material as the base material. The main component of the 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 easily broken or deformed.

[0003] Precisely because the TPU hot melt adhesive film is very soft, it is commonly used in fields such as clothing, shoe materials, and electronic products, 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, due to its own soft and easily deformable characteristics, the TPU hot melt adhesive film is prone to wrinkling and deformation under the action of tension during slitting and rewinding, resulting in rewinding wrinkles.

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

[0005] To overcome the technical defects existing in 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 as follows:

[0007] A yellowing-resistant hot melt adhesive film slitting and rewinding machine includes a unwinding system, an unwinding traction system, a cutting system, a floating leveling system, and a plurality of rewinding systems arranged in sequence. 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 rewinding system. Each cutting device is slidably installed on the cutting sliding beam. The reference frame has a fixed film-passing slit, and the height of the fixed film-passing slit is lower than that of each cutting device. Each rewinding system holds a plurality of rotating rewinding drums. The floating leveling system includes a leveling elastic frame and a floating film-passing rod. The leveling elastic frame extends towards the cutting system, and the leveling elastic frame elastically clamps the rewinding drum. The floating film-passing rod is installed on the side of the leveling elastic frame close to the cutting system. A floating film-passing slit is provided on the floating film-passing rod. 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 above the floating film-passing slit. The acceleration switch is electrically connected to the corresponding rewinding system. The leveling elastic frame rises as the rewinding diameter increases during the rewinding process.

[0008] Preferably, the unwinding system includes an unwinding rack, an unwinding shaft, and an unwinding cylinder. A rotary inner cylinder is provided in the unwinding cylinder through a bearing. The unwinding shaft passes through the unwinding inner cylinder, and the unwinding shaft is connected to the unwinding inner cylinder through a spline connection. The unwinding rack has an upwardly provided unwinding shaft groove, and the unwinding shaft is placed in the unwinding shaft groove.

[0009] Preferably, the unwinding and traction system includes an unwinding and traction device and a preloading device. The preloading device is installed on the unwinding and traction device. The unwinding and traction device and the preloading device are arranged oppositely, and the preloading device has a pre-tightening force pointing to the unwinding and traction device.

[0010] Preferably, the unwinding and traction device includes an unwinding and traction motor and an unwinding and traction roller. The unwinding and traction motor and the unwinding and traction roller are connected by a chain drive.

[0011] Preferably, the preloading device includes a preloading slider, a preloading roller, a preloading guide rod, and a preloading lifting cylinder. The preloading guide rod is installed on the unwinding and traction device. The preloading slider slides up and down along the preloading guide rod. The preloading roller is rotatably installed on the preloading slider. Both ends of the preloading lifting cylinder are installed on the top cross beam of the preloading guide rod and the preloading slider respectively.

[0012] Preferably, the winding system includes a winding roller and a winding motor. The winding roller and the winding motor are connected by a chain drive. Each winding cylinder is sleeved and installed on the winding roller.

[0013] Preferably, the cutting device includes a cutting slider and a cutting knife. The cutting slider is slidably installed on the cutting sliding beam, and the cutting knife is installed on the cutting slider.

[0014] Preferably, the flattening elastic frame includes a flattening frame body and an elastic sheet. The elastic sheet is installed on the flattening frame body, and the elastic sheet and the flattening frame body clamp the winding cylinder.

[0015] A method for slitting and rewinding a yellowing-resistant hot melt adhesive film, using a yellowing-resistant hot melt adhesive film slitting and rewinding machine, includes the following steps:

[0016] S1: Adjust the position of the cutting device on the cutting sliding beam, and correspondingly adjust the position of the winding cylinder on the winding system;

[0017] S2: Pass the hot melt adhesive film through the unwinding and traction system, the fixed film passing slit, each cutting device, and the floating film passing slit in sequence until the hot melt adhesive film is wound around the winding cylinder;

[0018] S3: Place the floating flattening system on the winding cylinder;

[0019] S4: Synchronously start the unwinding and traction system and each winding system.

[0020] The beneficial effects of the present invention are as follows:

[0021] 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 and 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 slit, and the height of the fixed film-passing slit is lower than that of each cutting device, so that the film material is slit by each cutting device immediately after passing through the fixed film-passing slit. Each winding system holds 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 towards the cutting system. The leveling elastic frame elastically clamps the winding drum. The winding drum is sleeved on the winding system, and thus 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. A floating film-passing slit is provided on the floating film-passing rod. Under the action of the floating film-passing slit of the floating film-passing rod, the hot melt adhesive film is leveled to prevent winding wrinkles, and the leveling elastic frame dynamically balances the tension, stably preventing wrinkles caused by excessive tension throughout the winding process. Moreover, the leveling elastic frame is not fixedly installed and can be conveniently removed and used on other winding systems at any time. In order to facilitate the winding of film materials of various widths, multiple leveling elastic frames can be prepared on the premise that they have the same structure but different masses and widths, so as to quickly select a suitable leveling elastic frame according to the width requirements of the film material. In order to control the tension, the mass and center of gravity can be controlled on the leveling elastic frame by adsorbing magnets, thereby controlling the tension of the film material.

[0022] An acceleration switch is provided on the side of the floating film-passing rod close to the cutting system. The acceleration switch is located above the floating film-passing slit. The acceleration switch is electrically connected to the corresponding winding system. During the winding process, the leveling elastic frame rises as the winding diameter increases. The leveling elastic frame always presses on the film material during the winding process to ensure that the film material will not wrinkle throughout the winding process. After the tension of the film material decreases, the leveling elastic frame rotates downward until the film material presses on the acceleration switch. The acceleration switch controls the winding system to accelerate, thereby increasing the tension of the film material and causing the leveling elastic frame to rotate upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention.

[0024] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0025] Figure 3 is Figure 1 an enlarged schematic view of part B in

[0026] Figure 4 It is a sectional view schematic diagram of the floating leveling system.

[0027] Figure 5 is Figure 4Enlarged schematic diagram at position C in the [device].

[0028] Figure 6 It is Figure 4 An enlarged schematic diagram at position C in the [device] when the film material is pressed on the acceleration switch.

[0029] Description of reference numerals in the drawings:

[0030] 1. Unwinding system; 11. Unwinding rack; 12. Unwinding shaft; 13. Unwinding drum;

[0031] 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;

[0032] 3. Cutting system; 31. Reference frame; 311. Fixed film-passing slit; 32. Cutting sliding beam; 33. Cutting device; 331. Cutting slider; 332. Cutting knife;

[0033] 4. Floating leveling system; 41. Leveling elastic frame; 411. Leveling frame body; 412. Elastic sheet; 42. Floating film-passing rod; 421. Floating film-passing slit;

[0034] 5. Rewinding system; 51. Rewinding drum; 52. Rewinding motor;

[0035] 6. Film material;

[0036] 7. Acceleration switch. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] As Figure 1 — Figure 6As shown in the figure, this embodiment provides a yellowing-resistant hot melt adhesive film slitting and rewinding machine, which includes a unwind system 1, a unwind traction system 2, a cutting system 3, a floating leveling system 4 and a plurality of rewinding systems 5 arranged in sequence. The cutting system 3 includes a reference frame 31, a cutting sliding beam 32 and a plurality of cutting devices 33. The cutting sliding beam 32 is installed between the unwind traction system 2 and the rewinding system 5. Each cutting device 33 is slidably installed on the cutting sliding beam 32. The reference frame 31 has a fixed film passing slit 311, and the height of the fixed film passing slit 311 is lower than that of each cutting device 33, so that the film material 6 is slit by each cutting device 33 immediately after passing through the fixed film passing slit 311. Each rewinding system 5 holds a plurality of rotating rewinding drums 51. The rewinding drum 51 is sleeved on the rewinding system 5, and then the rewinding system 5 drives the rewinding drum 51 to rotate. The floating leveling system 4 includes a leveling elastic frame 41 and a floating film passing rod 42. The leveling elastic frame 41 extends towards the cutting system 3. The leveling elastic frame 41 elastically clamps the rewinding drum 51. The floating film passing rod 42 is installed on the side of the leveling elastic frame 41 close to the cutting system 3. A floating film passing slit 421 is provided on the floating film passing rod 42. Under the action of the floating film passing slit 421 of the floating film passing rod 42, the hot melt adhesive film is leveled to prevent winding wrinkles, and the leveling elastic frame 41 dynamically balances the tension, and stably prevents wrinkles caused by excessive tension during the whole rewinding process. Moreover, the leveling elastic frame 41 is not fixedly installed and can be easily removed and used on other rewinding systems 5 at any time. In order to facilitate the rewinding of film materials 6 with different widths, multiple leveling elastic frames 41 can be prepared on the premise of the same structure but different masses and widths, 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 the center of gravity can be controlled by adsorbing magnets on the leveling elastic frame 41, and then the tension of the film material 6 can be controlled.

[0039] An acceleration switch 7 is provided on the side of the floating film passing rod 42 close to the cutting system 3. The acceleration switch 7 is located above the floating film passing slit 421. The acceleration switch 7 is electrically connected to the corresponding rewinding system 5. During the rewinding process, the leveling elastic frame 41 rises as the rewinding diameter increases. The leveling elastic frame 41 always presses on the film material 6 during the rewinding process to ensure that the whole rewinding process of the film material 6 will not wrinkle. After the tension of the film material 6 decreases, the leveling elastic frame 41 rotates downward until the film material 6 presses on 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 rewinding system 5 to accelerate. This is the prior art and will not be elaborated here. Then the tension of the film material 6 increases, and then the leveling elastic frame 41 rotates upward.

[0040] Specifically, the unwinding system 1 includes an unwinding rack 11, an unwinding shaft 12, and an unwinding cylinder 13. A rotating inner cylinder is provided in the unwinding cylinder 13 through bearings. The unwinding shaft 12 passes through the unwinding inner cylinder, and the connection between the unwinding shaft 12 passing through the unwinding inner cylinder is a spline connection. The unwinding rack 11 has an upwardly provided unwinding shaft groove, and the unwinding shaft 12 is placed in the unwinding shaft groove. The unslit hot melt adhesive film is wound around the unwinding cylinder 13, and the unwinding cylinder 13 rotates relative to the rotating inner cylinder, thereby realizing unwinding.

[0041] Specifically, the unwinding and traction system 2 includes an unwinding and traction device 21 and a preloading device 22. The preloading device 22 is installed on the unwinding and traction device 21. The unwinding and traction device 21 and the preloading device 22 are arranged oppositely. The preloading device 22 has a pre-tightening force pointing to the unwinding and traction device 21 to ensure that the unwinding and traction device 21 has sufficient traction force.

[0042] Specifically, the unwinding and traction device 21 includes an unwinding and traction motor 211 and an unwinding and traction roller 212. The unwinding and traction motor 211 and the unwinding and traction roller 212 are connected by chain drive, thereby realizing the traction of the hot melt adhesive film.

[0043] Specifically, the preloading device 22 includes a preloading slider 221, a preloading roller 222, a preloading guide rod 223, and a preloading lifting cylinder 224. The preloading guide rod 223 is installed on the unwinding and traction device 21. The preloading slider 221 slides up and down along the preloading guide rod 223. The preloading roller 222 is rotatably installed on the preloading slider 221. The two ends of the preloading lifting cylinder 224 are respectively installed on the top cross beam of the preloading guide rod 223 and the preloading slider 221. The preloading lifting cylinder 224 controls the preloading pressure between the preloading roller 222 and the unwinding and traction device 21 to prevent the hot melt adhesive film from slipping.

[0044] Specifically, the winding system 5 includes a winding roller and a winding motor 52. The winding roller and the winding motor 52 are connected by chain drive. Each winding cylinder 51 is sleeved and installed on the winding roller, and the winding motor 52 drives the winding roller to realize winding.

[0045] 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. 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, and the cutting slider 331 slides on the cutting sliding beam 32 to control the cutting position.

[0046] Specifically, the leveling elastic frame 41 includes a leveling frame body 411 and elastic sheets 412. The elastic sheets 412 are hinged and installed on the leveling frame body 411. The elastic sheets 412 and the leveling frame body 411 clamp the winding drum 51. A tension spring is provided between the elastic sheets 412 and the leveling frame body 411 to facilitate clamping the winding drum 51. After more and more hot melt adhesive film is wound on the winding drum 51, the leveling frame body 411 follows and lifts to maintain the leveling function. As a result, the leveling frame body 411 not only maintains the leveling function but also maintains the tension control function throughout the process of the film material 6 being wound thicker and thicker.

[0047] A method for slitting and rewinding a yellowing-resistant hot melt adhesive film, using a slitting and rewinding machine for yellowing-resistant hot melt adhesive film, includes the following steps:

[0048] S1: Adjust the position of the cutting device 33 on the cutting sliding beam 32, and correspondingly adjust the position of the winding drum 51 on the winding system 5, so as to ensure that the hot melt adhesive film is wound at a suitable position on the winding drum 51;

[0049] S2: Pass the hot melt adhesive film through the unwinding and traction system 2, the fixed film passing slit 311, each cutting device 33, and the floating film passing slit 421 in sequence until the hot melt adhesive film is wound around the winding drum 51 to achieve slitting and winding;

[0050] S3: Place 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;

[0051] S4: Synchronously start the unwinding and traction system 2 and each winding system 5.

[0052] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A yellowing-resistant hot melt adhesive film slitting and rewinding machine, characterized in that, It includes an unwinding system, an unwinding traction system, a cutting system, a floating leveling system and several winding systems arranged in sequence. The cutting system includes a reference frame, a cutting sliding beam and several 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 slit, and the height of the fixed film-passing slit is lower than that of each cutting device. Each winding system holds several rotating winding drums. The floating leveling system includes a leveling elastic frame and a floating film-passing rod. The leveling elastic frame extends towards the cutting system, and 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. A floating film-passing slit is provided on the floating film-passing rod. 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 above the floating film-passing slit. After the tension of the film material decreases, the leveling elastic frame rotates downward until the film material presses on the acceleration switch. The acceleration switch is electrically connected to the corresponding winding system, and the leveling elastic frame lifts as the winding diameter increases during the winding process.

2. The slitting and rewinding machine for a yellowing-resistant hot melt adhesive film according to claim 1, characterized in that, 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, and the unwinding shaft is connected to the unwinding inner cylinder through a spline connection. The unwinding frame has an upwardly provided shaft slot, and the unwinding shaft is placed in the shaft slot.

3. The slitting and rewinding machine for yellowing-resistant hot melt adhesive film according to claim 1, characterized in that, The unwinding traction system includes 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 oppositely, and the pre-pressing device has a pre-tightening force pointing to the unwinding traction device.

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

5. The slitting and rewinding machine for yellowing-resistant hot melt adhesive film according to claim 3, characterized in that, The pre-pressing device includes a pre-pressing slider, a pre-pressing roller, a pre-pressing guide rod and a pre-pressing lifting cylinder. The pre-pressing guide rod is installed on the unwinding traction device. The pre-pressing slider slides up and down along the pre-pressing guide rod. The pre-pressing roller is rotatably installed on the pre-pressing slider. Both ends of the pre-pressing lifting cylinder are installed on the top cross beam of the pre-pressing guide rod and the pre-pressing slider respectively.

6. The slitting and rewinding machine for yellowing-resistant hot melt adhesive film according to claim 1, wherein The winding system includes a winding roller and a winding motor. The winding roller is connected to the winding motor by a chain drive. Each winding drum is sleeved and installed on the winding roller.

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

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

9. Method for slitting and rewinding the yellowing-resistant hot melt adhesive film, using the yellowing-resistant hot melt adhesive film slitting and rewinding machine described in claim 1, characterized in that, It includes the following steps: S1: Adjust the position of the cutting device on the cutting sliding beam, and correspondingly adjust the position of the winding drum on the winding system; S2: Pass the hot melt adhesive film through the unwinding traction system, the fixed film-passing slit, each cutting device and the floating film-passing slit in sequence until the hot melt adhesive film is wound around the winding drum; S3: Place the floating leveling system on the winding drum; S4: Synchronously start the unwinding traction system and each winding system.

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