Longitudinal film stretching machine

Abstract

The utility model relates to a stretcher, in particular to a longitudinal film stretcher which comprises a main machine, a film leading system is arranged on the inner wall of the left side of the main machine, the film leading system comprises fixing frames, the fixing frames are fixedly arranged on the periphery of the inner wall of the left side of the main machine in a scattered mode, film leading ropes are movably arranged on the outer rings of the fixing frames, and film leading ends are movably arranged at the front ends of the film leading ropes. The film guiding end comprises a film guiding plate and a rotating shaft, the film guiding plate is movably connected with one end of the rotating shaft, and the other end of the rotating shaft is movably connected with the film guiding rope. The stretching set is arranged in the middle of the main machine, the unwinding roller is arranged at the front end of the stretching set, one end of the unwinding roller is fixedly connected with the main machine, and the other end of the unwinding roller is movably connected with the main machine. According to the longitudinal film stretching machine, the film guiding system is arranged, the film guiding system can automatically guide a film needing to be guided out on the unwinding roller to the winding roller, the film does not need to be manually pulled to penetrate through various roller shafts, the working efficiency is improved, and the risk that fingers of an operator are clamped between the roller shafts is also reduced.

Description

Technical Field

[0001] The utility model relates to a stretching machine, in particular to a film longitudinal stretching machine. Background Art

[0002] MDO (Machine Direction Orientation) is the abbreviation of film machine direction stretching, that is, longitudinal stretching. Generally speaking, the MDO process is to stretch the film produced by the blown film or cast film production line at a certain temperature and stretch ratio, and then heat treat it, and then cool it to room temperature. This process can be carried out both online and offline. Using MDO technology to stretch the film can not only improve the transparency and gloss, rigidity and tear strength and barrier properties of the film, and the uniformity of the film thickness; at the same time, it can also thin the film, save raw materials, and reduce costs; and the processing is self-contained, reducing the production process, and is widely used in the research and development and testing of high-end PE, PVDF, and LCP films. Film longitudinal stretching machines can be divided into three types according to mechanical design: vertical, horizontal, and simple; vertical longitudinal stretching machines have a small footprint and are more suitable for laboratory use. Unlike vertical longitudinal stretching machines, horizontal longitudinal stretching machines are easy to expand and are more suitable for pilot and small-scale production. Simple stretching machines have small roller widths and single-point stretching, which are more suitable for nested use.

[0003] The above three film longitudinal stretching machines are all provided with labyrinth film guiding grooves on the side walls, which are convenient for manual film guiding. However, manual film guiding is inefficient and easily tears the film, which is not conducive to efficient production and increases the cost. In view of this, the utility model aims to provide a film longitudinal stretching machine. Utility Model Content

[0004] The main purpose of the utility model is to provide a film longitudinal stretching machine to solve the defects mentioned in the above background technology.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A film longitudinal stretching machine comprises a main machine, wherein a film guiding system is arranged on the left inner wall of the main machine, wherein the film guiding system comprises a fixing frame, wherein the fixing frame is dispersedly fixed around the left inner wall of the main machine, a film guiding rope is movably arranged on the outer circle of the fixing frame, and a film guiding end is movably arranged on the front end of the film guiding rope.

[0007] As a preferred technical solution of the utility model: the film guiding end includes a film guiding plate and a rotating shaft, the film guiding plate is movably connected to one end of the rotating shaft, and the other end of the rotating shaft is movably connected to the film guiding rope.

[0008] As a preferred technical solution of the utility model: a stretching group is provided in the middle of the main machine, a reel is provided at the front end of the stretching group, one end of the reel is fixedly connected to the main machine, and the other end of the reel is movably connected to the main machine.

[0009] As a preferred technical solution of the utility model: a winding roller is provided at the rear end of the stretching group, one end of the winding roller is fixedly connected to the main machine, and the other end of the winding roller is movably connected to the main machine.

[0010] As a preferred technical solution of the utility model: the stretching group is provided with two preheating rollers at one end close to the unwinding roller, and the two preheating rollers are arranged in an up-and-down staggered manner and are rotatably arranged on the main machine.

[0011] As a preferred technical solution of the utility model: two stretching rollers are respectively arranged in parallel on the left sides of the two preheating rollers, and the two stretching rollers are rotatably arranged on the main machine.

[0012] As a preferred technical solution of the utility model: two annealing rollers are respectively and parallelly arranged on the left sides of the two stretching rollers, and the two annealing rollers are rotatably arranged on the main machine.

[0013] As a preferred technical solution of the utility model: a cooling roller is provided at the center of the left side of the two annealing rollers, and the cooling roller is rotatably arranged on the main machine.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] This type of longitudinal film stretching machine is equipped with a film guiding system, which can automatically guide the film that needs to be guided out from the unwinding roller to the winding roller, without manually pulling the film through various rollers, thereby speeding up work efficiency and reducing the risk of operators' fingers being caught between the rollers; the film guiding plate of the film guiding system can rotate around the rotating axis. When the film guiding system is needed to pull the film, the film guiding plate is rotated to a direction perpendicular to the film guiding rope. When the film guiding system is not needed, the film guiding plate is rotated to a direction parallel to the film guiding rope, and then the film guiding system is hung on the fixed frame. The retracted film guiding system is close to the side wall of the main machine, taking up very little space and not affecting the stretching work of the stretching group. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of a film longitudinal stretching machine in a preferred embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the stretching group in the preferred embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the film guiding system in the preferred embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the membrane guide plate structure in a preferred embodiment of the utility model.

[0020] Illustration Description:

[0021] 1. Host;

[0022] 3. Film guiding system; 301. Film guiding rope; 302. Fixed frame; 303. Film guiding end; 3031. Film guiding plate; 3032. Rotating shaft.

[0023] 4. Stretching group; 401. Unwinding roller; 402. Preheating roller; 403. Stretching roller; 404. Annealing roller; 405. Cooling roller; 406. Winding roller. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] See also Figure 1-Figure 4 As shown, the purpose of this embodiment is to provide a film longitudinal stretching machine, including a film guiding system 3 for pulling the film, the fixing frames 302 of the film guiding system 3 are dispersedly fixed around the inner wall on the left side of the main machine 1, and are used to fix the film guiding rope 301 of the film guiding system 3, and the front end of the film guiding rope 301 is movably provided with a film guiding end 303, and the film guiding end 303 is used to connect the film to be pulled.

[0026] The film guide end 303 is composed of a film guide plate 3031 and a rotating shaft 3032. One end of the rotating shaft 3032 is movably connected to the film guide plate 3031, and the other end is movably connected to the film guide rope 301. The film guide plate 3031 can rotate around the rotating shaft 3032. The film guide plate 3031 rotates to a direction perpendicular to the rotating shaft 3032, connects the film on the unwinding roller 401 to the film guide plate 3031, and winds the film guide rope 301 around the preheating roller 402. Around the stretching roller 403, annealing roller 404, cooling roller 405 and winding roller 406, start the unwinding roller 401 and the winding roller 406, and the film guiding system 3 will pull the film on the unwinding roller 401 to the winding roller 406; when the film guiding system does not need to work, separate the film guiding plate 3031 from the film and rotate it to a direction parallel to the rotating shaft 3032, pick up the film guiding rope 301 and the film guiding end 303 and hang them on the fixed frame 302.

[0027] A stretching group 4 is provided in the middle of the main machine 1 , and a reel 401 is provided at the front end of the stretching group 4 . The reel 401 is rotatably mounted on one end of the main machine 1 , and a semi-finished film to be stretched is placed on the reel 401 .

[0028] A winding roller 406 is provided at the rear end of the stretching group 4. The winding roller 406 is rotatably mounted on the other end of the main machine 1. The winding roller 406 is used to wind up the film on the unwinding roller 401 that has been stretched.

[0029] Two preheating rollers 402 are provided at one end of the stretching group 4 near the unwinding roller 401. The two preheating rollers 402 are staggered in position up and down and are rotatably arranged on the main machine 1. The preheating rollers 402 are used for heating the semi-finished film on the unwinding roller 401. The two preheating rollers 402 are staggered in position up and down and can gradually heat the semi-finished film on the unwinding roller 401, which can avoid waste caused by melting of the film due to excessive heating, and avoid quality degradation caused by insufficient heating affecting the stretching effect.

[0030] Two stretching rollers 403 are arranged in parallel on the left side of the two preheating rollers 402. The two stretching rollers 403 are rotatably arranged on the main machine 1. The two stretching rollers 403 sequentially stretch the film heated by the preheating rollers 402, thereby ensuring the stretching rate of the film and improving the stretching quality of the film.

[0031] Two annealing rollers 404 are arranged in parallel on the left side of the two stretching rollers 403. The two annealing rollers 404 are rotatably arranged on the main machine 1. The two annealing rollers 404 gradually cool down the film stretched by the stretching rollers 403 to reduce the deformation and shrinkage of the material and improve the qualified rate of the product.

[0032] A cooling roller 405 is provided at the center of the left side of the two annealing rollers 404. The cooling roller 405 is rotatably provided on the main machine 1. The cooling roller 405 cools the film after the temperature of the two annealing rollers 404 is reduced to room temperature to ensure that the winding roller 406 can be wound normally.

[0033] It should be noted that the unwinding roller 401 , the preheating roller 402 , the stretching roller 403 , the annealing roller 404 , the cooling roller 405 , and the winding roller 406 are all driven by a power source provided on the main machine 1 , and the power source is a motor.

[0034] When the utility model is used, the film guide rope 301 is removed from the fixed frame 302, and is wound around the periphery of the preheating roller 402, the stretching roller 403, the annealing roller 404, the cooling roller 405 and the winding roller 406, and the film guide plate 3031 is rotated to a direction perpendicular to the rotating shaft 3032, and the film on the unwinding roller 401 is connected to the film guide plate 3031, and the unwinding roller 401 and the winding roller 406 are started, and the film guide system 3 will pull the film on the unwinding roller 401 to the winding roller 406. Roller 406, when the film on the unwinding roller 401 reaches the winding roller 406, close the unwinding roller 401 and the winding roller 406, separate the film guide plate 3031 from the film, rotate the film guide plate 3031 until it is parallel to the film guide rope 301, pick up the film guide rope 301 and the film guide end 303 and hang them on the fixed frame 302, wind the film drawn by the film guide plate 3031 on the winding roller 406, and drive the unwinding roller 401, preheating roller 402, stretching roller 403, The annealing roller 404, the cooling roller 405 and the winding roller 406 work together. The semi-finished film on the unwinding roller 401 is processed by the preheating roller 402, the stretching roller 403, the annealing roller 404 and the cooling roller 405 to become a finished film and is wound up by the winding roller 406. When the finished film reaches the winding roller 406, the main machine 1 is turned off, the film between the winding roller 406 and the cooling roller 405 is cut off, the defective film wound on the winding roller 406 is removed, and the film on the cooling roller 405 is wound up. The film is wound around the winding roller 406, and the main machine 1 is started again. The stretching group 4 stretches the film on the unwinding roller 401 into shape and then receives it on the winding roller 406. When the finished film on the winding roller 406 reaches a certain amount, the main machine 1 is turned off, the film between the winding roller 406 and the cooling roller 405 is cut off, the movable end of the winding roller 406 is opened, the wound finished film is removed, and the movable end of the winding roller 406 is reset, and the film on the cooling roller 405 is wound around the winding roller 406.

[0035] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A film longitudinal stretching machine, comprising a main machine (1), wherein a film guiding system (3) is provided on the left inner wall of the main machine (1), characterized in that: The film guiding system (3) comprises a fixing frame (302), wherein the fixing frame (302) is dispersedly fixed around the inner wall of the left side of the main machine (1), a film guiding rope (301) is movably provided on the outer circle of the fixing frame (302), and a film guiding end (303) is movably provided at the front end of the film guiding rope (301).

2. A film longitudinal stretching machine according to claim 1, characterized in that: The film guiding end (303) comprises a film guiding plate (3031) and a rotating shaft (3032), wherein the film guiding plate (3031) is movably connected to one end of the rotating shaft (3032), and the other end of the rotating shaft (3032) is movably connected to the film guiding rope (301).

3. A film longitudinal stretching machine according to claim 2, characterized in that: A stretching group (4) is provided in the middle of the main machine (1), a reeling roller (401) is provided at the front end of the stretching group (4), one end of the reeling roller (401) is fixedly connected to the main machine (1), and the other end of the reeling roller (401) is movably connected to the main machine (1).

4. A film longitudinal stretching machine according to claim 3, characterized in that: A winding roller (406) is provided at the rear end of the stretching group (4), one end of the winding roller (406) is fixedly connected to the main machine (1), and the other end of the winding roller (406) is movably connected to the main machine (1).

5. A film longitudinal stretching machine according to claim 4, characterized in that: The stretching group (4) is provided with two preheating rollers (402) at one end close to the unwinding roller (401), and the two preheating rollers (402) are arranged in an up-and-down staggered manner and are rotatably provided on the main machine (1).

6. A film longitudinal stretching machine according to claim 5, characterized in that: Two stretching rollers (403) are respectively arranged in parallel on the left side of the two preheating rollers (402), and the two stretching rollers (403) are rotatably arranged on the main machine (1).

7. A film longitudinal stretching machine according to claim 6, characterized in that: Two annealing rollers (404) are arranged in parallel on the left side of the two stretching rollers (403), and the two annealing rollers (404) are rotatably arranged on the main machine (1).

8. A film longitudinal stretching machine according to claim 7, characterized in that: A cooling roller (405) is provided at the center of the left side of the two annealing rollers (404), and the cooling roller (405) is rotatably arranged on the main machine (1).

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