Stretching structure for balanced impact-resistant BOPA nylon film processing

Abstract

The utility model discloses a balanced impact-resistant stretching structure for processing a BOPA (Biaxially Oriented Polyamide) nylon film, which comprises a rack, an upper stretching roller group and a lower stretching roller group are arranged at the upper end and the lower end in the rack, and a feeding guide roller and a discharging guide roller are respectively arranged on one side of the outer part of the rack corresponding to the upper stretching roller group and the lower stretching roller group; by utilizing the upper stretching roller group and the lower stretching roller group which are opposite up and down and can independently rotate and combining anti-skid textures on the surfaces, the BOPA nylon film can be uniformly stretched in the transverse direction, so that the situation of excessive or insufficient local stretching is avoided, the thickness uniformity and the consistency of physical properties of the stretched film are ensured, and the production efficiency of the BOPA nylon film is improved. And two groups of vertical stretching rollers respectively arranged in the upper stretching roller group and the lower stretching roller group are used for carrying out vertical two-way stretching on clamping transmission of the BOPA nylon film, so that the position of the stretched BOPA nylon film can be kept unchanged by utilizing the anti-deviation protection plate in the vertical stretching transmission process, and the problem of position deviation of the BOPA nylon film in the stretching process is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to BOPA nylon film processing technical field, concretely relates to a balanced type impact -resistant BOPA nylon film processing is drawn structure. BACKGROUND

[0002] The biaxially oriented film is generally stretched on a special stretching machine. The film blank to be stretched is first introduced into a longitudinal stretching roller group, and the film is pulled forward by the roller. Since the speed of each roller gradually increases, the speed difference between the rollers stretches the film blank in the longitudinal direction. After the film passes through the longitudinal stretching roller group, it enters the transverse stretching mechanism. The two ends of the film stretched in the longitudinal direction are clamped by clamps, and the film is pulled forward by the clamps. As the distance between the running tracks of the clamps clamping the two ends of the stretched film gradually increases, the film blank is also stretched in the transverse direction, and then it is wound up. This stretching device needs to reset to the initial stretching position after the clamps complete a stretching, and then the stretching is performed again. In order to ensure continuous stretching during transverse stretching, multiple clamps are needed, and the clamps need to be controlled to complete the clamping action. However, the existing stretching equipment has a gap between the clamps during film stretching, which cannot fully stretch the film.

[0003] Therefore, a film biaxial stretching device with publication number "CN220661705U" is provided, which includes a longitudinal stretching mechanism and a transverse stretching mechanism. The longitudinal stretching mechanism includes a housing and multiple stretching rollers. The rotational speed of the stretching rollers gradually increases. The transverse stretching mechanism includes a base and two sets of clamping conveying mechanisms. The two sets of clamping conveying mechanisms are arranged in an eight-shaped manner from left to right. The clamping conveying mechanism includes a support frame, a lower conveying assembly, and an upper conveying assembly. The bottom end of the support frame is fixed on the base by bolts. The upper end of the support frame supports the lower conveying assembly. The upper conveying assembly is connected to the lower conveying assembly by an adjusting mechanism. The height of the upper conveying assembly is adjusted by the adjusting mechanism. The clamping conveying mechanisms on both sides in an eight-shaped manner can continuously complete the transverse stretching of the film. The overall structure is simple and suitable for promotion. The conveying belts of the clamping conveying mechanisms do not have a gap when continuously clamping the film, so the film can be fully stretched.

[0004] However, for the above-mentioned film biaxial stretching device, although the clamping conveying mechanisms on both sides in an eight-shaped manner can continuously complete the transverse stretching of the film, the following obvious defects still exist during use: the stretching rollers in the above-mentioned stretching device are vertically staggered to lift. Since there is a large gap between the vertically staggered stretching rollers, the film cannot be stretched and conveyed in position by the stretching rollers, which easily causes the film to stretch out of position. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a balanced type impact -resistant BOPA nylon film processing is drawn structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a balanced impact BOPA nylon film processing tensile structure, comprising:

[0007] The frame is internally provided with upper and lower ends of the frame, which are provided with upper and lower stretching roller groups for vertically bidirectional synchronous heating and stretching of the BOPA nylon film, one side of the frame is externally provided with an input and output BOPA nylon film guide roller for guiding the material, the rear end of the frame is internally provided with a tension horizontal stretching roller for horizontal stretching of the BOPA nylon film, the tension horizontal stretching roller is provided with a sliding shaft seat at both ends of the tension horizontal stretching roller, and the sliding shaft seat is externally provided with a guide rail groove for horizontal sliding of the sliding shaft seat.

[0008] Preferably, the upper and lower stretching roller groups each comprise two integrated stretching roller frames, the stretching roller frames are internally provided with vertically stretching rollers arranged in sequence and independently rotatable at the upper and lower ends, and the vertically stretching rollers at the upper end of the stretching roller frame are provided with anti-deviation guards to keep the nylon film at the center of the upper and lower stretching roller groups during stretching.

[0009] Preferably, the frame is internally provided with stretching cylinder pieces at the upper and lower ends, the stretching cylinder pieces are provided with heating connecting frames, the heating connecting frames are fixed at the ends of the upper and lower stretching roller groups through the connecting rods, the vertically stretching rollers at the upper and lower ends of the stretching roller frame are provided with anti-skid textures on the surfaces, and the BOPA nylon film can be uniformly stretched in the horizontal direction.

[0010] Preferably, the vertically stretching rollers at the upper and lower ends of the stretching roller frame are mutually attached, and the anti-deviation guards are clamped at both ends of the vertically stretching rollers at the bottom of the stretching roller frame, so as to ensure uniformity of the BOPA nylon film during vertical stretching.

[0011] Preferably, the guide rail groove is transversely fixed on the front and rear walls of the frame, the guide rail groove is internally provided with a tension cylinder at one end, the tension cylinder is fixed at the sliding shaft seat at both ends of the tension horizontal stretching roller, the sliding shaft seat is guided to slide in the guide groove internally provided in the sliding cavity of the guide rail groove, and the BOPA nylon film can be horizontally stretched.

[0012] Preferably, the frame is vertically provided with an inlet frame opening and an outlet frame opening on one side, the inlet guide roller and the outlet guide roller are respectively arranged in the inlet frame opening and the outlet frame opening and are each provided with two, the input and output BOPA nylon films are supported and guided, and the BOPA nylon film is prevented from being scratched by the inner wall of the frame during stretching.

[0013] Compared with the prior art, the technical effects and advantages of the equalizing type impact-resistant BOPA nylon film processing stretching structure are as follows: through the combination of the upper stretching roller group, the lower stretching roller group, the stretching roller frame, the vertical stretching roller, the anti-deviation guard, the stretching cylinder and the anti-skid texture, the upper stretching roller group and the lower stretching roller group which are opposite and can rotate independently are used, and the anti-skid texture on the surface is combined, so that the BOPA nylon film can be uniformly stretched in the transverse direction, the problems of local overstretching or insufficient stretching are avoided, the thickness uniformity and the consistency of physical properties of the film after stretching are ensured, and through the vertical bidirectional stretching of the two groups of vertical stretching rollers arranged in the upper stretching roller group and the lower stretching roller group, the position of the stretched BOPA nylon film can be kept unchanged in the vertical stretching transmission by the anti-deviation guard, so that the problem of position deviation of the BOPA nylon film in the stretching process is avoided, and the uniformity of the vertical bidirectional stretching of the BOPA nylon film is further improved.

[0014] Through the cooperation of the tension horizontal stretching roller, the tension cylinder, the guide rail groove and the sliding shaft seat, the tension of the tension horizontal stretching roller can be monitored and adjusted in real time, so that the stretching force borne by the nylon film is balanced and stable in the whole stretching process, and the stretching quality and the stability of the product are further improved. Whether manual adjustment or automatic adjustment mode can meet different production needs and operation habits, and the horizontal transverse stretching of the BOPA nylon film by the tension horizontal stretching roller can make the molecular structure of the BOPA nylon film reach an equilibrium state, so as to provide better physical properties and impact resistance, so that the BOPA nylon film has better physical properties and thermal stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of the utility model;

[0016] Fig. 2 It is a side view schematic view of the upper stretching roller group and the lower stretching roller group of the utility model;

[0017] Fig. 3 It is a side view schematic view of the tension horizontal stretching roller of the utility model.

[0018] In the drawing: 1, rack; 2, upper stretching roller group; 3, lower stretching roller group; 4, inlet guide roller; 5, outlet guide roller; 6, tension horizontal stretching roller; 7, sliding shaft seat; 8, guide rail groove; 9, stretching roller frame; 10, vertical stretching roller; 11, anti-deviation guard; 12, stretching cylinder; 13, heating connecting frame; 14, anti-skid texture; 15, feeding frame opening; 16, discharging frame opening; 17, tension cylinder. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings of the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the present utility model.

[0020] Please refer to Figs. 1-3 The present utility model provides a technical scheme: a balanced impact-resistant BOPA nylon film processing stretching structure, comprising:

[0021] The rack 1 is used as the support frame of the whole stretching structure, guarantees the relative position and stability of each component, and is internally provided with an upper stretching roller group 2 and a lower stretching roller group 3 for stretching the BOPA nylon film in a vertical bidirectional synchronous heating mode. In operation, the BOPA nylon film enters the upper stretching roller group 2 and the lower stretching roller group 3 from the inlet end of the rack 1 through the guidance of the feeding roller 4, and is stretched by the rotation and friction force of the upper and lower rollers. The rack 1 is externally provided with the feeding roller 4 and the discharging roller 5 on one side corresponding to the positions of the upper stretching roller group 2 and the lower stretching roller group 3 for guiding the BOPA nylon film to enter and discharge, thereby playing a guiding role for the BOPA nylon film. The rear end of the rack 1 is internally provided with a tension horizontal stretching roller 6 for horizontally stretching the BOPA nylon film in a transverse direction, thereby uniformly stretching the BOPA nylon film in a horizontal transverse direction. The tension horizontal stretching roller 6 is provided with a sliding shaft seat 7 on the rotating shafts at both ends, thereby enabling the tension horizontal stretching roller 6 to move horizontally in a transverse direction. The sliding shaft seat 7 is externally provided with a guide rail groove 8 for enabling the sliding shaft seat 7 to slide horizontally in a transverse direction, thereby enabling the tension horizontal stretching roller 6 to stably slide horizontally in a transverse direction.

[0022] The upper stretching roller group 2 and the lower stretching roller group 3 each comprise two stretching roller frames 9 connected as a whole. The stretching roller frames 9 are internally provided with vertical stretching rollers 10 arranged in a transverse direction and capable of independently rotating at the upper end and the lower end. The vertical stretching rollers 10 can uniformly stretch the BOPA nylon film in a vertical bidirectional mode. The stretching roller frames 9 are provided with anti-deviation guards 11 at the two ends of the vertical stretching rollers 10 at the upper end, thereby reducing the deviation of the BOPA nylon film during stretching. The rack 1 is internally provided with stretching cylinder members 12 at the upper end and the lower end, thereby enabling the upper stretching roller group 2 and the lower stretching roller group 3 to vertically stretch the BOPA nylon film. The stretching roller frames 9 are internally provided with anti-skid textures 14 on the surfaces of the vertical stretching rollers 10 at the upper end and the lower end. Each vertical stretching roller 10 is provided with a helical anti-skid texture 14, which can effectively increase the friction between the nylon film and the stretching roller, thereby preventing the nylon film from slipping during stretching and ensuring the uniformity and stability of the stretching.

[0023] The stretching cylinder 12 is provided with a heating connecting frame 13, and the heating connecting frame 13 is fixed at the end of the upper stretching roller group 2 and the lower stretching roller group 3 through the connecting rod, and the inner side top end of the heating connecting frame 13 is provided with a heating plate, which can moderately heat the nylon film during the stretching process, so that the molecular chain of the nylon film is more active, the stretching stress is reduced, and the uniformity and impact resistance of the nylon film are improved. The vertical stretching rollers 10 arranged at the upper and lower ends of the stretching roller frame 9 are mutually adhered, and the anti-deviation guard 11 is clamped at the two ends of the vertical stretching roller 10 at the inner bottom end of the stretching roller frame 9, so as to guide, limit and keep the nylon film in the middle state during stretching.

[0024] The guide rail groove 8 is transversely fixed on the front and rear walls inside the rack 1, and the tensioning cylinder 17 is arranged at one end of the sliding cavity in the guide rail groove 8. The tensioning horizontal stretching roller 6 is horizontally transversely slid by the sliding shaft seat 7 to horizontally transversely stretch the nylon film. The tensioning cylinder 17 is fixed at one end of the sliding shaft seat 7 at the two ends of the tensioning horizontal stretching roller 6, and the sliding shaft seat 7 is guided and slid in the guide groove arranged in the sliding cavity in the guide rail groove 8, so that the tensioning horizontal stretching roller 6 keeps the stability of the position during horizontal transverse movement. The rack 1 is vertically provided with an inlet frame opening 15 and an outlet frame opening 16 on one side, so that the nylon film can be fed and discharged. The inlet guide roller 4 and the outlet guide roller 5 are arranged inside the inlet frame opening 15 and the outlet frame opening 16 respectively, and each is provided with two rollers, which can press the nylon film to keep the conveying position unchanged.

[0025] Specifically, in use, first, according to the specifications and performance requirements of the BOPA nylon film to be processed, the initial tension of the upper stretching roller group 2 and the lower stretching roller group 3 is adjusted by the stretching cylinder 12 arranged at the upper and lower ends inside the rack 1. Then the nylon film is introduced from the inlet end in the inlet frame opening 15 of the rack 1 by the inlet guide roller 4, and after being guided by the inlet guide roller 4, it is pressed and stretched vertically upward between the vertical stretching rollers 10 in the upper stretching roller group 2 and conveyed, and then it is stretched horizontally transversely by the tensioning horizontal stretching roller 6 through the extension and retraction of the tensioning cylinder 17. The horizontally transversely stretched BOPA nylon film is pressed and stretched vertically downward between the vertical stretching rollers 10 in the lower stretching roller group 3 and conveyed, and then it is guided by the outlet guide roller 5 and discharged from the outlet frame opening 16. Thus, the BOPA nylon film can be stretched simultaneously in the horizontal and vertical directions, the molecular structure of the film can be balanced, and better physical properties and impact resistance can be provided. At the same time, the stretched BOPA nylon film can keep the position unchanged during vertical stretching and conveying by the anti-deviation guard 11, so that the problem of position deviation of the BOPA nylon film during the stretching process can be avoided.

[0026] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An equalized impact resistant BOPA nylon film processing tensile structure, characterized in that, The utility model relates to a BOPA nylon film vertical two-way synchronous heating and stretching device, which comprises a rack (1) internally provided with an upper stretching roller set (2) and a lower stretching roller set (3) at the upper and lower ends for vertically stretching BOPA nylon film in two directions, and an input and output BOPA nylon film guide-in roller (4) and a guide-out roller (5) are arranged at the positions corresponding to the upper and lower stretching roller sets (2) and (3) on one side of the outer part of the rack (1). The upper and lower stretching roller sets (2) and (3) each comprise two stretching roller frames (9) connected as one, vertically arranged stretching rollers (10) independently rotatable in sequence on the inner sides of the upper and lower ends of the stretching roller frames (9), and anti-deviation guards (11) are arranged at the two ends of the vertically arranged stretching rollers (10) at the upper end of the inner part of the stretching roller frames (9).

2. A balanced impact resistant BOPA nylon film processing tensile structure according to claim 1, characterized in that: The rack (1) is internally provided with stretching cylinder parts (12) at the upper and lower ends, and the stretching cylinder parts (12) are provided with heating connecting frames (13) and fixed to the ends of the upper and lower stretching roller sets (2) and (3) through the connecting rods arranged thereon.

3. A balanced impact resistant BOPA nylon film processing tensile structure according to claim 2, characterized in that: The vertically arranged stretching rollers (10) arranged at the upper and lower ends of the inner part of the stretching roller frames (9) are in close contact with each other, and the anti-deviation guards (11) are clamped at the two ends of the vertically arranged stretching rollers (10) at the bottom end of the inner side of the stretching roller frames (9).

4. The balanced impact resistant BOPA nylon film processing tensile structure according to claim 3, characterized in that: The guide rail grooves (8) are transversely fixed to the front and rear walls of the inner part of the rack (1), the guide rail grooves (8) are internally provided with tensioning cylinders (17) at one end of the sliding cavities, the tensioning cylinders (17) are fixed to the sliding shaft seats (7) at the two ends of the tensioning horizontal stretching rollers (6) at one end, and the sliding shaft seats (7) are guided to slide in the guide grooves arranged in the sliding cavities of the guide rail grooves (8) on the upper and lower surfaces.

5. The balanced impact resistant BOPA nylon film processing tensile structure according to claim 1, characterized in that: The rack (1) is vertically provided with an inlet frame opening (15) and an outlet frame opening (16) on one side, the guide-in roller (4) and the guide-out roller (5) are arranged in the inlet frame opening (15) and the outlet frame opening (16) respectively and each provided with two.

6. The balanced impact resistant BOPA nylon film processing tensile structure according to claim 1, characterized in that: ​

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