Thin film electronic crosslinking device

Abstract

The utility model discloses a film electronic cross-linking device and relates to a packaging film production device. The utility model aims to solve the problems that the mechanical strength and the barrier property of a film produced by the existing down-blowing or casting process are greatly different from those of a double-drawing film, and the deep drawing property is lower. The device comprises a preheating roller, a cooling roller, an annealing roller and a winding bracket which are respectively in running fit with power output shafts of a preheating roller motor, a cooling roller motor, a rotating roller motor and a winding motor; the speed regulation signal output end of the controller is electrically connected with the speed regulation signal input end of a preheating roller motor, the speed regulation signal input end of a cooling roller motor, the speed regulation signal input end of a rotating roller motor and the speed regulation signal input end of a winding motor. The unwinding mechanism can release the wound film; the released thin film is wound on the winding bracket after being dragged by the preheating roller, the cooling roller and the annealing roller in sequence; the electronic crosslinking mechanism is located between the preheating roller and the cooling roller, and the electron emitting end and the electron receiving end of the electronic crosslinking mechanism are located on the two sides of the film respectively.

Description

Technical Field

[0001] The utility model relates to a packaging film production device. Background Art

[0002] Existing products, such as meat products, are packaged in various forms, and multi-layer co-extruded stretch film and multi-layer co-extruded body-fitting film are currently the mainstream packaging materials on the market. Most of these packaging materials are produced by blowing or casting processes. The plastic film produced by this process has relatively small longitudinal and transverse stretching during the production process, resulting in a significant difference in the mechanical strength and barrier properties of the film compared to the double-stretched film. The deep drawing performance is relatively small, and it is not easy to adapt to the shape of the product, and thus it is impossible to display the product in three dimensions. Utility Model Content

[0003] The utility model aims to overcome the problem that the mechanical strength and barrier properties of films produced by the existing down-blowing or casting processes are much different from those of double-drawn films, and the deep-drawing performance is relatively low, and provides a film electronic cross-linking device.

[0004] The thin film electronic cross-linking device of the utility model comprises an unwinding mechanism, a preheating mechanism, an electronic cross-linking mechanism, a cooling mechanism, an annealing mechanism, a winding mechanism and a controller;

[0005] The preheating mechanism includes a preheating roller and a preheating roller motor, the cooling mechanism includes a cooling roller and a cooling roller motor, the annealing mechanism includes an annealing roller and an annealing roller motor, and the winding mechanism includes a winding support and a winding motor;

[0006] The preheating roller, the cooling roller, the annealing roller and the winding bracket are respectively rotated with the power output shafts of the preheating roller motor, the cooling roller motor, the rotating roller motor and the winding motor, and the preheating roller, the cooling roller, the annealing roller and the winding bracket are parallel to each other;

[0007] The preheating roller motor speed control signal output terminal, the cooling roller motor speed control signal output terminal, the rotating roller motor speed control signal output terminal and the winding motor speed control signal output terminal of the controller are electrically connected to the preheating roller motor speed control signal input terminal, the cooling roller motor speed control signal input terminal, the rotating roller motor speed control signal input terminal and the winding motor speed control signal input terminal respectively;

[0008] The unwinding mechanism can release the rolled film;

[0009] The released film is successively pulled by the preheating roller, the cooling roller and the annealing roller and then wound on the winding support;

[0010] The electronic cross-linking mechanism is located between the preheating roller and the cooling roller, and the electron emitting end and the electron receiving end of the electronic cross-linking mechanism are respectively located on two sides of the film.

[0011] Furthermore, the electron beam irradiation emitted by the electronic cross-linking mechanism is 180KEV to 2500KEV, and the treatment dosage is 8Mrad to 18Mrad.

[0012] Further, the number of preheating rollers is two and each is rotationally matched with a preheating roller motor;

[0013] The temperature of the two preheating rollers is 30°C to 50°C.

[0014] Further, the number of cooling rollers is two and each is rotationally matched with a cooling roller motor;

[0015] The temperature of the two cooling rollers was 8°C to 15°C.

[0016] Further, the number of annealing rollers is three and each is rotationally matched with an annealing roller motor;

[0017] The temperature of the two annealing rollers adjacent to the cooling roller is 50°C to 70°C;

[0018] The temperature of the third annealing roller is 20°C to 30°C.

[0019] Further, the unwinding mechanism includes an unwinding bracket and a magnetic powder brake;

[0020] The unwinding bracket is rotatably matched with the rotating shaft of the magnetic powder brake machine.

[0021] The beneficial effects of the utility model are:

[0022] The speed of each preheating roller, cooling roller, annealing roller and winding support of the film electronic cross-linking device can be controlled separately, which can make the blown or cast film achieve zero tension during the electron beam irradiation process, which is more conducive to the formation of the internal network structure of the film and effectively improve the mechanical properties of the nylon co-extruded film. The network structure between the molecules inside the film makes the film have better deep drawing performance, so that various products can be better displayed in three dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the thin film electronic cross-linking device of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Specific implementation method 1

[0028] The thin film electronic cross-linking device of this embodiment includes an unwinding mechanism 1, a preheating mechanism 2, an electronic cross-linking mechanism 3, a cooling mechanism 4, an annealing mechanism 5, a winding mechanism 6 and a controller;

[0029] The preheating mechanism 2 includes a preheating roller 2-1 and a preheating roller motor, the cooling mechanism 4 includes a cooling roller 4-1 and a cooling roller motor, the annealing mechanism 5 includes an annealing roller 5-1 and an annealing roller motor, and the winding mechanism 6 includes a winding support 6-1 and a winding motor;

[0030] The preheating roller 2-1, the cooling roller 4-1, the annealing roller 5-1 and the winding bracket 6-1 are respectively rotated with the power output shafts of the preheating roller motor, the cooling roller motor, the rotating roller motor and the winding motor, and the preheating roller 2-1, the cooling roller 4-1, the annealing roller 5-1 and the winding bracket 6-1 are parallel to each other;

[0031] The preheating roller motor speed control signal output terminal, the cooling roller motor speed control signal output terminal, the rotating roller motor speed control signal output terminal and the winding motor speed control signal output terminal of the controller are electrically connected to the preheating roller motor speed control signal input terminal, the cooling roller motor speed control signal input terminal, the rotating roller motor speed control signal input terminal and the winding motor speed control signal input terminal respectively;

[0032] The unwinding mechanism 1 can release the rolled film;

[0033] The released film is successively pulled by the preheating roller 2-1, the cooling roller 4-1 and the annealing roller 5-1 and then wound on the winding support 6-1;

[0034] The electronic cross-linking mechanism 3 is located between the preheating roller 2 - 1 and the cooling roller 4 - 1 , and the electron emitting end and the electron receiving end of the electronic cross-linking mechanism 3 are respectively located on both sides of the film.

[0035] Specifically, the film is a nylon co-extruded film (thickness 60-μm200μm), which is installed through an unwinding mechanism 1 to generate unwinding tension for the film. The film is then preheated by a preheating mechanism 2, crosslinked by an electron beam by an electronic crosslinking mechanism 3, cooled by a cooling mechanism 4, and annealed by an annealing mechanism 5. The annealed film is rolled up by a rolling mechanism 7. Among them, the preheating roller motor, the cooling roller motor, the rotating roller motor and the winding motor can all adopt servo motors, and the speed is adjusted by a controller respectively. The speed of each preheating roller 2-1, the cooling roller 4-1, the annealing roller 5-1 and the winding bracket 6-1 can be controlled separately, thereby achieving a state of zero tension of the film during the electron beam irradiation process, which is more conducive to the formation of a network structure inside the film and effectively improves the various mechanical properties of the film. Specific implementation method 2

[0037] This embodiment is a further description of the first embodiment. In this embodiment, the electron beam irradiation emitted by the electronic cross-linking mechanism 3 is 180KEV to 2500KEV, and the treatment dosage is 8Mrad to 18Mrad.

[0038] Specifically, the electronic cross-linking mechanism 3 irradiates the film, and can use high-energy electron beams to form a cross-linking structure between molecules in the film, thereby generating a network structure inside the film.

[0039] After the film is preheated, it enters the electronic cross-linking mechanism 3, and the electron beam generating device of the electronic cross-linking mechanism 3 is started to emit electron beams. The electron beam irradiation is 180KEV-2500KEV, and the treatment dose is 8Mrad-18Mrad. Specific implementation method three

[0041] This embodiment is a further description of the first or second embodiment. In this embodiment, there are two preheating rollers 2-1, each of which is rotatably matched with a preheating roller motor.

[0042] The temperature of the two preheating rollers 2 - 1 is 30° C. to 50° C.

[0043] Specifically, the preheating roller 2 - 1 should have good thermal conductivity, and a steel rod may be used.

[0044] The temperature of the preheating roller 2-1 is controlled by a mold temperature controller and maintained at 30°C-50°C, and the preheating roller motor controls the speed of the preheating roller 2-1 to preheat and pull the film. Specific implementation method four

[0046] This embodiment is a further description of the first or second embodiment. In this embodiment, the number of cooling rollers 4-1 is two and each of them is rotationally matched with a cooling roller motor;

[0047] The temperature of both cooling rollers 4 - 1 is 8°C to 15°C.

[0048] Specifically, after the film is irradiated, it enters the cooling mechanism 4, and the temperature of the cooling roller 4-1 is controlled by the mold temperature controller at 8° C.-15° C. Similarly, the cooling roller 4-1 should also have good thermal conductivity, and a steel rod can be used.

[0049] The cooling roller motor controls the speed of each cooling roller 4-1 to cool and pull the film. Specific implementation method five

[0051] This embodiment is a further description of the first or second embodiment. In this embodiment, the number of annealing rollers 5-1 is three and each of them is rotationally matched with an annealing roller motor;

[0052] The temperatures of the two annealing rollers 5-1 adjacent to the cooling roller 4-1 are both 50°C to 70°C;

[0053] The temperature of the third annealing roller 5-1 is 20°C to 30°C.

[0054] Specifically, after the film is cooled, the internal stress of the film needs to be eliminated by the annealing mechanism 5. The annealing roller 5-1 should have good thermal conductivity and can be a steel rod.

[0055] The temperatures of the two annealing rollers 5-1 adjacent to the cooling roller 4-1 are controlled at 50-70°C by the mold temperature controller. The third annealing roller 5-1 has a cooling function and its temperature is controlled at 20-30°C by the mold temperature controller.

[0056] The annealing roller motor controls the speed of each annealing roller 5-1 to anneal, cool and pull the film.

[0057] The speed of the rotating rollers or supports of each part (preheating roller 2-1, cooling roller 4-1, annealing roller 5-1 and winding support 6-1) can be controlled separately, and they work together to achieve zero tension traction of the film during electron beam irradiation. Specific implementation method 6

[0059] This embodiment is a further description of the first or second embodiment. In this embodiment, the unwinding mechanism 1 includes an unwinding bracket 1 and a magnetic powder brake;

[0060] The unwinding bracket 1 is rotatably matched with the rotating shaft of the magnetic powder brake.

[0061] Specifically, the magnetic powder brake uses the magnetic viscosity and magnetic resistance generated by the magnetic effect of the magnetic powder liquid to achieve braking. It is a passive device that rotates passively under the drive of other rollers or brackets, and is used to accurately control the release speed of the film.

[0062] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

Claims

1. A thin film electronic cross-linking device, characterized in that: It comprises an unwinding mechanism (1), a preheating mechanism (2), an electronic cross-linking mechanism (3), a cooling mechanism (4), an annealing mechanism (5), a winding mechanism (6) and a controller; The preheating mechanism (2) comprises a preheating roller (2-1) and a preheating roller motor, the cooling mechanism (4) comprises a cooling roller (4-1) and a cooling roller motor, the annealing mechanism (5) comprises an annealing roller (5-1) and an annealing roller motor, and the winding mechanism (6) comprises a winding support (6-1) and a winding motor; The preheating roller (2-1), the cooling roller (4-1), the annealing roller (5-1) and the winding support (6-1) are respectively rotatably matched with the power output shafts of the preheating roller motor, the cooling roller motor, the rotating roller motor and the winding motor, and the preheating roller (2-1), the cooling roller (4-1), the annealing roller (5-1) and the winding support (6-1) are parallel to each other; The preheating roller motor speed control signal output terminal, the cooling roller motor speed control signal output terminal, the rotating roller motor speed control signal output terminal and the winding motor speed control signal output terminal of the controller are electrically connected to the preheating roller motor speed control signal input terminal, the cooling roller motor speed control signal input terminal, the rotating roller motor speed control signal input terminal and the winding motor speed control signal input terminal respectively; The unwinding mechanism (1) is capable of releasing the rolled-up film; The released film is pulled by a preheating roller (2-1), a cooling roller (4-1) and an annealing roller (5-1) in sequence and then wound on a winding support (6-1); The electronic cross-linking mechanism (3) is located between the preheating roller (2-1) and the cooling roller (4-1), and the electron emitting end and the electron receiving end of the electronic cross-linking mechanism (3) are respectively located on both sides of the film.

2. The thin film electronic cross-linking device according to claim 1, characterized in that: The electron beam irradiation emitted by the electron cross-linking mechanism (3) is 180KEV to 2500KEV, and the treatment dosage is 8Mrad to 18Mrad.

3. The thin film electronic cross-linking device according to claim 1 or 2, characterized in that: There are two preheating rollers (2-1), each of which is rotatably matched with a preheating roller motor; The temperature of the two preheating rollers (2-1) is 30°C to 50°C.

4. The thin film electronic cross-linking device according to claim 1 or 2, characterized in that: There are two cooling rollers (4-1), each of which is rotationally matched with a cooling roller motor; The temperature of the two cooling rollers (4-1) is 8°C to 15°C.

5. The thin film electronic cross-linking device according to claim 1 or 2, characterized in that: The number of annealing rollers (5-1) is three and each of them is rotationally matched with an annealing roller motor; The temperatures of the two annealing rollers (5-1) adjacent to the cooling roller (4-1) are both 50°C to 70°C; The temperature of the third annealing roller (5-1) is 20°C to 30°C.

6. The thin film electronic cross-linking device according to claim 1 or 2, characterized in that: The unwinding mechanism (1) comprises an unwinding bracket and a magnetic powder brake; The unwinding bracket is rotationally matched with the rotating shaft of the magnetic powder brake.

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