Reflective film and preparation method and equipment thereof

Abstract

The present invention discloses a reflective film and a preparation method and equipment thereof, belonging to the technical field of reflective films, comprising an intermediate layer, wherein the upper and lower surfaces of the intermediate layer are respectively connected to an upper surface layer and a lower surface layer, forming a three-layer reflective film. The present invention proposes a reflective film and a preparation method and equipment thereof, wherein the intermediate layer of the reflective film adopts a fine foaming structure, the upper surface layer and the lower surface layer adopt a surface microstructure, and the three layers are co-extruded to form an ABA structure. The transmission gear on the transmission screw rotates around the gear ring, the transmission screw rotates on its own, and the abutment sleeve slowly rises outward along the thread of the transmission screw, and the spring slowly stretches until the thread inside the abutment sleeve disengages from the thread of the transmission screw and moves to a smooth position, and the strip groove of the film cylinder aligns with the four extended abutment sleeves, thereby realizing that the film cylinder is sleeved on the winding shaft, and the film cylinder rotates to realize film winding. After winding is completed, the winding shaft rotates in the opposite direction, and the abutment sleeve slowly retracts inward, making it convenient to remove the film cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of reflective films, and in particular to a reflective film and a preparation method and equipment thereof. Background Art

[0002] The Chinese patent published under the publication (announcement) number CN216785192U discloses a winding device for producing a reflective film, comprising a fixed base, a first support rod being movably mounted on the top of the fixed base. The winding device for producing reflective film is characterized in that a telescopic rod is fixedly installed on the left side of a fixed plate, and the left side of the telescopic rod is connected to the first support rod, a hydraulic cylinder is fixedly installed inside a sliding groove, and the output shaft of the hydraulic cylinder is fixedly connected to the first support rod. When the winding device is fixed, the telescopic rod and the hydraulic cylinder move in the same direction, and at the same time drive the first support rod to move to the left inside the sliding groove, so that the connecting plate is more stable during the movement process, thereby ensuring the stability of the winding device when in use. The winding roller installed on it can slide at the right end position of the support shaft. Driven by the motor, the output shaft of the motor is fixedly installed on the first turntable to drive the winding roller to rotate and wind up the reflective film. The left side of the winding roller is inserted into the inside of a limiting groove provided inside the first turntable, and the right side of the winding roller is fixedly installed inside the second turntable through the action of a fixing structure. The limiting rod is inserted into the inside of the limiting groove to limit and fix the winding roller, thereby ensuring that the winding roller is convenient for the operator to operate when winding up the reflective film and will not fall off and affect the winding efficiency.

[0003] There are the following defects:

[0004] The limit rod needs to be inserted into the limit groove to achieve the limit fixation of the winding roller. However, the limit rod has a small structure and is easily lost if it is frequently replaced. Summary of the Invention

[0005] The object of the present invention is to provide a reflective film and a method and device for preparing the same, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a reflective film, comprising an intermediate layer, wherein the upper and lower surfaces of the intermediate layer are respectively connected to the upper surface layer and the lower surface layer to form a three-layer reflective film.

[0007] Furthermore, the middle layer is composed of PP material and foaming agent.

[0008] Furthermore, the outer surfaces of the upper surface layer and the lower surface layer are provided with irregular microstructures, and the irregular microstructures are concave-convex.

[0009] Furthermore, an antistatic agent is added to the surface of the middle layer connected to the upper surface layer and the lower surface layer.

[0010] The present invention provides a method for preparing a reflective film, comprising the following steps:

[0011] S1: Load the rolled reflective film into the unwinding mechanism;

[0012] S2: Pass one end of the reflective film through the transmission mechanism and wind it around the winding mechanism;

[0013] S3: The edge cutting mechanism cuts the reflective film according to the required width, and the winding mechanism rotates and continuously winds up the reflective film;

[0014] S4: Repeat the above steps S1 to S3 to achieve continuous production of the reflective film.

[0015] The present invention provides a device for preparing a reflective film, comprising a base, on which are mounted an unwinding mechanism, a transmission mechanism, and a rewinding mechanism, wherein the unwinding mechanism and the rewinding mechanism are located on both sides of the transmission mechanism, and an edge cutting mechanism is disposed on the transmission mechanism;

[0016] Furthermore, the unwinding mechanism includes a left unwinding frame, a right unwinding frame, an unwinding shaft and an unwinding base plate, the left unwinding frame is fixed to the base plate, the unwinding shaft is inserted into the bearing of the left unwinding frame, and the right unwinding frame slides along the slide rail on the unwinding base plate, which is used to connect or disconnect the right unwinding frame with the other end of the unwinding shaft;

[0017] The winding mechanism includes a left winding frame, a right winding frame, a winding base plate, a winding motor, a winding shaft, a film assembly component and a film cylinder. The left winding frame is fixed to the winding base plate, the right winding frame slides along the winding base plate, one end of the film cylinder is opened and inserted into the bearing cylinder protruding from the side of the right winding frame, the winding motor arranged on the left winding frame is connected to the winding shaft and the film assembly component, the winding shaft and the film assembly component are connected, and the film assembly component extends outward and rests on the inner wall of the film cylinder;

[0018] The film assembly component includes a gear ring, a gear ring connecting rod and a telescopic member, wherein the gear ring is fixed to the left winding frame through the gear ring connecting rod, wherein the winding shaft passes through the left winding frame and overlaps with the axis of the gear ring;

[0019] The reel is provided with four sets of telescopic parts, each set of telescopic parts includes a transmission gear, a transmission screw, a limiting rod, a transmission seat and a resist sleeve. The transmission seat and the limiting rod are fixed side by side on the reel, the smooth end of the bottom end of the transmission screw is inserted into the bearing in the transmission seat, the thread in the middle of the transmission screw is engaged with the resist sleeve, a spring is sleeved on the limiting rod, and one end of the spring is fixed to the limiting rod, and the side surface of the other end of the spring is fixed to the outer wall of the resist sleeve;

[0020] The transmission gear is fixed on the smooth end of the bottom of the transmission screw and meshes with the gear ring.

[0021] Furthermore, four strip grooves along the axial direction are provided on the inner wall of the film cylinder, and the abutment sleeve is inserted therein, so as to ensure synchronous rotation of the film cylinder and the unwinding shaft.

[0022] Furthermore, the transmission mechanism includes a transmission frame, a front roller group and a rear roller group. The front roller group and the rear roller group have the same structure and are located on the front and rear ends of the transmission frame.

[0023] Furthermore, the edge cutting mechanism includes a transverse cylinder, a cutting frame, a cutting knife and a longitudinal cylinder. The cutting frame is installed on the edge of the transmission frame. The transverse cylinder is connected to the cutting frame by bolts. The cylinder rod of the transverse cylinder is connected to the longitudinal cylinder. The cutting knife is connected to the cylinder of the longitudinal cylinder.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention proposes a reflective film and its preparation method and equipment. The film's middle layer utilizes a finely foamed structure to minimize light energy consumption. The upper and lower surface layers utilize a surface microstructure design, replacing traditional reflective surface coating processes to achieve anti-adsorption, anti-scratch, and uniform light dispersion. The three layers are co-extruded to form an ABA structure, effectively resolving the aging issues of traditional PP reflective films. The addition of an antistatic agent imparts lubricity to the polymer surface, lowering the coefficient of friction and suppressing and reducing static electricity generation. The film's properties are permanent, non-migrating, thermally stable, and weather-resistant.

[0026] 2. The present invention proposes a reflective film and a preparation method and equipment thereof. The transmission gear on the transmission screw will rotate around the gear ring, the transmission screw will produce self-rotation, and the resistance sleeve will slowly rise outward along the thread of the transmission screw. The spring will slowly stretch until the thread inside the resistance sleeve is disengaged from the thread of the transmission screw and moves to a smooth position. The strip groove of the film cylinder is aligned with the four extended resistance sleeves, so that the film cylinder is sleeved on the winding shaft, and the film cylinder is rotated to realize film winding. After the winding is completed, the winding shaft rotates in the opposite direction, and the rotation direction of the transmission screw is opposite to the thread of the transmission screw. Under the pull of the spring, the resistance sleeve slowly shrinks inward, making it convenient to remove the film cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the reflective film of the present invention;

[0028] Figure 2 This is a diagram of the film roll structure of the device of the present invention;

[0029] Figure 3 This is a structural diagram of the device of the present invention without film rolling;

[0030] Figure 4 This is a diagram of the unwinding mechanism and the rewinding mechanism of the present invention in an opened state;

[0031] Figure 5 This is a structural diagram of the membrane assembly components of the present invention;

[0032] Figure 6 An exploded view of the membrane assembly of the present invention;

[0033] Figure 7 It is a structural diagram of the membrane cylinder of the present invention;

[0034] Figure 8 It is a side view of the membrane assembly component and membrane cartridge insertion of the present invention.

[0035] In the figure: 1. base; 2. unwinding mechanism; 21. unwinding left frame; 22. unwinding right frame; 23. unwinding shaft; 24. unwinding bottom plate; 3. transmission mechanism; 31. transmission frame; 32. front roller group; 33. rear roller group; 4. edge cutting mechanism; 41. horizontal cylinder; 42. cutting frame; 43. cutting knife; 44. longitudinal cylinder; 5. winding mechanism; 51. winding left frame; 52. winding right frame; 53. winding bottom plate; 54. winding motor; 55. winding shaft; 56. film assembly parts; 561. gear ring; 562. gear ring connecting rod; 563. transmission gear; 564. transmission screw; 565. limit rod; 566. transmission seat; 567. sleeve; 57. film cylinder; 6. upper surface layer; 7. lower surface layer; 8. middle layer. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1:

[0038] In order to solve the problem in the existing technology, the limit rod needs to be inserted into the limit groove to realize the limit fixation of the winding roller. However, the limit rod structure is small and is easy to lose if it is frequently replaced. Figure 1-8 ;

[0039] A reflective film comprises an intermediate layer 8, wherein the upper and lower surfaces of the intermediate layer 8 are respectively connected to an upper surface layer 6 and a lower surface layer 7, thereby forming a three-layer reflective film.

[0040] The middle layer 8 is composed of PP material and foaming agent. The middle layer 8 adopts a delicate foaming structure to minimize the consumption of light energy, making the brightness higher than the traditional PP and PET coating reflection. Through the foaming treatment of the middle layer 8, it forms an ABA structure with the upper surface layer 6 and the lower surface layer 7 on both sides, making the thermal stability far exceed that of traditional PP.

[0041] The outer surfaces of the upper surface layer 2 and the lower surface layer 7 are provided with irregular microstructures, which are concave and convex. The surface microstructure design replaces the traditional reflective surface coating process to achieve anti-adsorption, anti-scratch, uniform light diffusion and other effects. The three layers are co-extruded to form an ABA structure, which perfectly solves the problem of easy aging of traditional PP reflection.

[0042] Antistatic agent is added to the surface where the middle layer 8 is connected to the upper surface layer 2 and the lower surface layer 7. The antistatic agent molecules can not only give the surface of the polymer material a certain lubricity, reduce the friction coefficient, inhibit and reduce the generation of static electricity, but also be permanent, non-migrating, thermally stable and weather-resistant.

[0043] The present invention provides a method for preparing a reflective film, comprising the following steps:

[0044] Step 1: Load the rolled reflective film into the unwinding mechanism 2;

[0045] Step 2: Pass one end of the reflective film through the transmission mechanism 3 and wind it on the winding mechanism 5;

[0046] Step 3: The edge cutting mechanism 4 cuts the reflective film according to the required width, and the winding mechanism 5 rotates and continuously winds the reflective film;

[0047] S4: Repeat the above steps 1 to 3 to achieve continuous production of the reflective film.

[0048] The apparatus for preparing a reflective film proposed in the present invention comprises a base 1, on which are mounted an unwinding mechanism 2, a transmission mechanism 3, and a rewinding mechanism 5. The unwinding mechanism 2 and the rewinding mechanism 5 are located on either side of the transmission mechanism 3, and an edge cutting mechanism 4 is disposed on the transmission mechanism 3.

[0049] The unwinding mechanism 2 includes a left unwinding frame 21, a right unwinding frame 22, an unwinding shaft 23 and an unwinding base plate 24. The left unwinding frame 21 is fixed to the base plate 24, the unwinding shaft 23 is inserted into the bearing of the left unwinding frame 21, and the right unwinding frame 22 slides along the slide rail on the unwinding base plate 24, which is used to connect or disconnect the right unwinding frame 22 with the other end of the unwinding shaft 23;

[0050] The winding mechanism 5 includes a left winding frame 51, a right winding frame 52, a winding base plate 53, a winding motor 54, a winding shaft 55, a film assembly component 56 and a film cylinder 57. The left winding frame 51 is fixed on the winding base plate 53, and the right winding frame 52 slides along the winding base plate 53. One end of the film cylinder 57 is inserted into the bearing cylinder protruding from the side of the right winding frame 52. The winding motor 54 provided on the left winding frame 51 is connected to the winding shaft 55 and the film assembly component 56. The winding shaft 55 and the film assembly component 56 are connected, and the film assembly component 56 extends outward and rests on the inner wall of the film cylinder 57.

[0051] Specifically, the unwinding mechanism 2 and the rewinding mechanism 5 are used in conjunction with each other. The unwinding mechanism 2 is used to assemble the rolled reflective film, and the rewinding mechanism 5 is used to rewind the reflective film after the size is adjusted.

[0052] When the unwinding mechanism 2 is assembling the reflective film, the right unwinding frame 22 slides along the bottom plate 24 to expose the end of the unwinding shaft 23. The cylinder at the center of the rolled reflective film is sleeved on the unwinding shaft 23. The right unwinding frame 22 moves to seal the end of the unwinding shaft 23, thereby limiting the deviation of the reflective film during the winding process.

[0053] The winding mechanism 5 can also be disassembled to facilitate the assembly of the film cylinder 57 on the winding shaft 55, and the winding shaft 55 is powered by the winding motor 54 to rotate. After the winding film is wound around the film cylinder 57 once under manual intervention, it can work automatically. The winding motor 54 drives the winding shaft 55 to rotate to realize the rolling of the reflective film.

[0054] The film assembly component 56 includes a ring gear 561, a ring gear connecting rod 562, and a telescopic member. The ring gear 561 is fixed to the left winding frame 51 through the ring gear connecting rod 562. The winding shaft 55 passes through the left winding frame 51 and overlaps with the axis of the ring gear 561.

[0055] The reel 55 is provided with four sets of telescopic parts, each set of telescopic parts includes a transmission gear 563, a transmission screw 564, a limiting rod 565, a transmission seat 566 and a collar 567. The transmission seat 566 and the limiting rod 565 are fixed side by side on the reel 55. The smooth bottom end of the transmission screw 564 is inserted into the bearing in the transmission seat 566. The thread in the middle of the transmission screw 564 engages with the collar 567. A spring is sleeved on the limiting rod 565, and one end of the spring is fixed to the limiting rod 565, and the other end side of the spring is fixed to the outer wall of the collar 567.

[0056] The transmission gear 563 is fixed to the smooth bottom end of the transmission screw 564 and meshes with the ring gear 561 .

[0057] The inner wall of the film cylinder 57 is provided with four strip grooves along the axial direction, into which the abutment sleeve 567 is inserted, so as to ensure the synchronous rotation of the film cylinder 57 and the unwinding shaft 23.

[0058] Specifically, when the film cylinder 57 needs to be assembled on the winding mechanism 5, the right winding frame 52 moves to expose the end of the winding shaft 55, and the winding motor 54 drives the winding shaft 55 to rotate. During the rotation of the winding shaft 55, the limit rod 565 and the transmission seat 566 on the winding shaft 55 rotate synchronously. When the transmission seat 566 rotates, the transmission screw 564 rotates with the transmission seat 566, and the transmission gear 563 on the transmission screw 564 rotates around the gear ring 561, and the transmission screw 564 rotates on its own. The transmission screw 564 has a structure with smooth ends and a threaded middle part.

[0059] Since the sleeve 567 is restricted by the limit rod 565, the sleeve 567 will slowly rise outward along the thread of the transmission screw 564 during the rotation of the transmission screw 564, and the spring will slowly stretch until the thread inside the sleeve 567 is disengaged from the thread of the transmission screw 564 and moves to a smooth position. At this time, the rotation direction of the transmission screw 564 is the same as the thread of the transmission screw 564. The rotation of the winding shaft 55 can only drive the transmission screw 564 to rotate around the axis and rotate itself, while the position of the sleeve 567 will not rise or fall. At this time, the winding motor 54 stops, and the strip grooves of the film cylinder 57 are aligned with the four extended sleeves 567, so that the film cylinder 57 is sleeved on the winding shaft 55.

[0060] The rotation of the winding shaft 55 drives the film cylinder 57 to rotate synchronously, and the rotation of the film cylinder 57 realizes film winding. After the winding is completed, the winding shaft 55 rotates in the opposite direction, and the rotation direction of the transmission screw 564 is opposite to the thread of the transmission screw 564. Under the pull of the spring, the sleeve 567 slowly shrinks inward, making it easy to remove the film cylinder 57. It adopts an integral structure and there is no need to remove the fixed structure separately.

[0061] The transmission mechanism 3 includes a transmission frame 31 , a front roller group 32 and a rear roller group 33 . The front roller group 32 and the rear roller group 33 have the same structure and are located at the front and rear ends of the transmission frame 31 .

[0062] The edge cutting mechanism 4 includes a transverse cylinder 41, a cutting frame 42, a cutting knife 43 and a longitudinal cylinder 44. The cutting frame 42 is installed on the edge of the transmission frame 31. The transverse cylinder 41 is connected to the cutting frame 42 by bolts. The cylinder rod of the transverse cylinder 41 is connected to the longitudinal cylinder 44. The cutting knife 43 is connected to the cylinder of the longitudinal cylinder 44.

[0063] Specifically, the front roller group 32 and the rear roller group 33 are set to limit the front and rear ends of the reflective film for subsequent cutting. The horizontal cylinder 41 and the vertical cylinder 44 change the position of the cutting knife 43 and adjust the width of the reflective film according to needs to achieve reflective film preparation.

[0064] Example 2:

[0065] Except that the structure of the film cylinder 57 and the abutment sleeve 567 is the same as that of the first embodiment, the rest of the structures are the same. In this embodiment, the interior of the film cylinder 57 adopts a smooth structure, and the strip groove structure is removed. The film cylinder 57 is directly put on the abutment sleeve 567, and the winding motor 54 rotates. A spring-loaded rubber structure is provided on the port of the abutment sleeve 567, which extends the abutment sleeve 567 outward until the rubber abuts against the inside of the film cylinder 57, and drives the film cylinder 57 to rotate through friction.

[0066] In summary, the reflective film and its preparation method and equipment of the present invention utilize a finely sculpted foam structure in the middle layer 8 to minimize light energy consumption. The upper and lower surface layers 2 and 7 utilize surface microstructures, replacing traditional reflective surface coating processes to achieve anti-adsorption, anti-scratch, and uniform light dispersion. The three layers are co-extruded to form an ABA structure, effectively resolving the aging issues of traditional PP reflective films. The addition of an antistatic agent imparts lubricity to the polymer surface, lowering the coefficient of friction and suppressing and reducing static electricity generation. The film is permanent, non-migrating, thermally stable, and weather-resistant.

[0067] When the transmission seat 566 rotates, the transmission screw 564 rotates along with the transmission seat 566, and the transmission gear 563 on the transmission screw 564 rotates around the gear ring 561, and the transmission screw 564 rotates on its own. The sleeve 567 slowly rises outward along the thread of the transmission screw 564, and the spring slowly stretches until the thread inside the sleeve 567 disengages from the thread of the transmission screw 564 and moves to a smooth position. The strip groove of the film cylinder 57 is aligned with the four extended sleeves 567, so that the film cylinder 57 is sleeved on the winding shaft 55.

[0068] The rotation of the winding shaft 55 drives the film cylinder 57 to rotate synchronously, and the film cylinder 57 rotates to realize film winding. After the winding is completed, the winding shaft 55 rotates in the opposite direction, and the rotation direction of the transmission screw 564 is opposite to the thread of the transmission screw 564. Under the pull of the spring, the sleeve 567 slowly shrinks inward, making it easy to remove the film cylinder 57.

[0069] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for preparing a reflective film, characterized in that: The invention comprises a base (1), wherein an unwinding mechanism (2), a transmission mechanism (3) and a rewinding mechanism (5) are installed on the base (1), the unwinding mechanism (2) and the rewinding mechanism (5) are located on both sides of the transmission mechanism (3), and an edge cutting mechanism (4) is arranged on the transmission mechanism (3); The unwinding mechanism (2) comprises an unwinding left frame (21), an unwinding right frame (22), an unwinding shaft (23) and an unwinding bottom plate (24), wherein the unwinding left frame (21) is fixed on the unwinding bottom plate (24), one end of the unwinding shaft (23) is inserted into a bearing of the unwinding left frame (21), and the unwinding right frame (22) slides along a slide rail on the unwinding bottom plate (24) for connecting or disconnecting the unwinding right frame (22) from the other end of the unwinding shaft (23); The winding mechanism (5) includes a left winding frame (51), a right winding frame (52), a winding bottom plate (53), a winding motor (54), a winding shaft (55), a film assembly component (56) and a film cylinder (57). The left winding frame (51) is fixed on the winding bottom plate (53), the right winding frame (52) slides along the winding bottom plate (53), one end of the film cylinder (57) is inserted into the bearing cylinder protruding from the side of the right winding frame (52), and the film cylinder (57) is connected to the winding motor (54) arranged on the left winding frame (51). There is a reel (55) and a film assembly component (56), the reel (55) and the film assembly component (56) are connected, and the film assembly component (56) extends outward and abuts against the inner wall of the film cylinder (57); the film assembly component (56) includes a gear ring (561), a gear ring connecting rod (562) and a telescopic member, and the gear ring (561) is fixed to the left reeling frame (51) through the gear ring connecting rod (562), wherein the reel (55) passes through the left reeling frame (51) and overlaps with the axis of the gear ring (561); The reel (55) is provided with four groups of telescopic parts, each group of telescopic parts includes a transmission gear (563), a transmission screw (564), a limiting rod (565), a transmission seat (566) and a resisting sleeve (567), the transmission seat (566) and the limiting rod (565) are fixed side by side on the reel (55), the smooth end of the bottom end of the transmission screw (564) is inserted into the bearing in the transmission seat (566), the thread in the middle of the transmission screw (564) is engaged with the resisting sleeve (567), a spring is sleeved on the limiting rod (565), and one end of the spring is fixed to the limiting rod (565), and the side surface of the other end of the spring is fixed to the outer wall of the resisting sleeve (567); the transmission gear (563) is fixed to the smooth end of the bottom end of the transmission screw (564) and is engaged with the gear ring (561); The inner wall of the film cylinder (57) is provided with four strip grooves along the axial direction, into which the abutment sleeve (567) is inserted, so as to enable the film cylinder (57) and the unwinding shaft (23) to rotate synchronously.

2. The device for preparing a reflective film according to claim 1, characterized in that: The transmission mechanism (3) comprises a transmission frame (31), a front roller group (32) and a rear roller group (33). The front roller group (32) and the rear roller group (33) have the same structure. The front roller group (32) and the rear roller group (33) are located at the front and rear ends of the transmission frame (31).

3. The device for preparing a reflective film according to claim 2, characterized in that: The edge cutting mechanism (4) comprises a transverse cylinder (41), a cutting frame (42), a cutting knife (43) and a longitudinal cylinder (44). The cutting frame (42) is mounted on the edge of the transmission frame (31). The transverse cylinder (41) is connected to the cutting frame (42) via bolts. The cylinder rod of the transverse cylinder (41) is connected to the longitudinal cylinder (44). The cutting knife (43) is connected to the cylinder of the longitudinal cylinder (44).

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