Plastic film cutting device with tightening structure

Abstract

The utility model discloses a plastic film cutting device with a tightening structure, relates to the field of plastic film processing, and aims to solve the problems that in the prior art, due to the fact that a plastic film is soft in texture and no tightening mechanism is arranged on an existing cutting device, when a cutting knife cuts the plastic film, the cutting position of the plastic film is prone to deformation, and the plastic film cannot be cut easily. And the cutting quality of the plastic film is influenced. A C-shaped supporting frame is fixedly connected to the middle of the upper end of the cutting table, a hydraulic rod is fixedly connected to the middle of the upper end of the C-shaped supporting frame, a lower pressing plate is arranged at the upper end of the inner side of the C-shaped supporting frame, a cutting knife is fixedly connected to the middle of the lower end of the lower pressing plate, and telescopic cylinders are fixedly connected to the front ends and the rear ends of the two sides of the upper end face of the lower pressing plate. The lower end of the telescopic cylinder extends out of the lower end face of the lower pressing plate and is connected with a telescopic rod, the lower end of the telescopic rod is fixedly connected with fixing blocks, and a pressing roller is rotationally connected between the two horizontally-aligned fixing blocks.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plastic film processing, concretely to a plastic film cutting device with a tightening structure. BACKGROUND

[0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, used for packaging and as a coating layer. Plastic packaging and plastic packaging products are taking up an increasingly large share of the market, especially composite plastic soft packaging, which has been widely used in food, medicine, chemical industry and other fields, of which food packaging accounts for the largest proportion, such as beverage packaging, frozen food packaging, steamed food packaging, fast food packaging, etc. These products have brought great convenience to people's life. Plastic film needs to be cut using a cutting device during production.

[0003] For example, the authorized announcement number CN 213290391 U provides a plastic film cutting device, which relates to the technical field of plastic film production auxiliary device, which includes a mounting frame, the mounting frame includes two parallel support rods, a connecting rod fixed in the middle of the two support rods, the connecting rod is a long rod-shaped member, and a cutting assembly for cutting plastic film is installed on the connecting rod along the width direction of the plastic film. This scheme uses a cutting assembly that moves along the width direction of the plastic film, making the resistance to cutting the plastic film smaller, and having the effect of making the process of cutting the plastic film easier.

[0004] Because the plastic film is soft, the existing cutting device does not have a tightening mechanism, so when the cutting knife cuts the plastic film, the cutting position of the plastic film is prone to deformation, affecting the cutting quality of the plastic film. Therefore, there is an urgent need to develop a plastic film cutting device with a tightening structure to help people solve the existing problems. Utility model content

[0005] The utility model aims to provide a plastic film cutting device with a tightening structure to solve the problem of the cutting position of the plastic film being prone to deformation when the cutting knife cuts the plastic film due to the softness of the plastic film, which affects the cutting quality of the plastic film.

[0006] To achieve the above object, the utility model provides the following technical scheme: A plastic film cutting device with a taut structure, including cutting table, the middle part of C type support frame is fixedly connected in the upper end of cutting table, the middle part of hydraulic rod is fixedly connected in the upper end of C type support frame, the upper end of C type support frame inside is provided with the lower pressing plate, the middle part of cutting knife is fixedly connected in the lower end of lower pressing plate, the front and rear ends of both sides of lower pressing plate upper end surface are all fixedly connected with telescopic cylinder, the lower end of telescopic cylinder extends lower pressing plate lower end surface and is connected with telescopic rod, the lower end of telescopic rod is fixedly connected with fixed block, and the rotation is connected with the compression roller between the horizontal alignment two fixed blocks.

[0007] Preferably, the front and rear ends of both sides of the upper end surface of the C-shaped support frame are provided with guide holes, and the front and rear ends of both sides of the upper end surface of the lower pressing plate are fixedly connected with guide rods.

[0008] Preferably, the four guide rods on the upper end of the lower pressing plate extend out of the upper end surface of the C-shaped support frame through the four guide holes.

[0009] Preferably, the lower end of the hydraulic rod extends through the C-shaped support frame and is fixedly connected with the middle part of the upper end of the lower pressing plate.

[0010] Preferably, the upper end of the telescopic rod extends into the telescopic cylinder and is fixedly connected with a limiting piece, and a spring is arranged in the telescopic cylinder and on the upper end of the limiting piece.

[0011] Preferably, the middle part of the compression roller is fixedly connected with a rotating shaft, and the two ends of the rotating shaft are respectively inserted into the middle part of the two fixed blocks.

[0012] Preferably, the outer side of the fixed block on one side is fixedly connected with a driving device, and one end of the rotating shaft extends out of one side of the fixed block and is fixedly connected with the output end of the driving device.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) In the utility model, the compression roller and the driving device are arranged to tautly pretreat the plastic film before cutting operation. This design significantly improves the deformation problem of the traditional cutting device when cutting soft plastic film. The compression roller can apply uniform and controllable tension to both sides of the plastic film under the driving of the driving device, so that the plastic film remains taut under the cutting knife, thereby effectively improving the cutting precision and the flatness of the edge, and the cut plastic film meets the quality requirements.

[0015] (2) The utility model discloses a spring and telescopic rod constitute the elastic compression mechanism, realize the adjustment of the plastic film compression force. This mechanism can according to the thickness of plastic film, material and the degree of tightness automatic adjustment the size of compression force, ensure that the compression roller can effectively fix plastic film, prevent its in cutting process slip or deformation, also can not damage the surface of plastic film because of excessive pressure. This self -adaptation compression mode greatly improves the flexibility and applicability of cutting process, makes the device can be applicable to the cutting of various types and specifications plastic film.

[0016] (3) The utility model discloses a guide rod is set up on the lower pressing plate, and the guide hole that cooperates with it is set up on the C type support frame, realizes the stable guidance of lower pressing plate and cutting knife in the process of lifting. This design not only improves the stability of cutting operation, reduces the cutting error caused by shaking or deviation, also makes the whole cutting process more stable, smooth. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view of a plastic film cutting device with the utility model of tight structure;

[0018] Figure 2 It is the main section view of telescopic cylinder of the utility model;

[0019] Figure 3 It is the side section view of the utility model;

[0020] Figure 4 It is the A detail enlarged view of the utility model.

[0021] In the drawing: 1, cutting table;2, C type support frame;201, guide hole;202, hydraulic rod;3, lower pressing plate;301, guide rod;302, cutting knife;4, telescopic cylinder;401, telescopic rod;402, limit sheet;403, spring;404, fixed block;5, compression roller;501, rotating shaft;6, driving device. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-4The utility model provides a kind of embodiment with the plastic film cutting device of tight structure, including cutting table 1, C type support frame 2 is fixedly connected with the middle part of cutting table 1 upper end, C type support frame 2 upper end middle part is fixedly connected with hydraulic rod 202, C type support frame 2 inner side upper end is provided with lower plate 3, cutting knife 302 is fixedly connected with the middle part of lower plate 3 lower end, the front and rear ends of both sides of C type support frame 2 upper end surface are provided with guide hole 201, the front and rear ends of both sides of lower plate 3 upper end surface are fixedly connected with guide rod 301, four guide rods 301 of lower plate 3 upper end respectively pass four guide holes 201 and extend out C type support frame 2 upper end surface, when plastic film is placed on cutting table 1, lower plate 3 is lowered by hydraulic rod 202, and then lower plate 3 drives cutting knife 302 to descend and cuts plastic film on cutting table 1, when lower plate 3 descends, the lifting of lower plate 3 is guided by four guide rods 301 respectively along four guide holes 201 sliding, guarantee the stability of lower plate 3 activity.

[0024] The front and rear ends of both sides of lower plate 3 upper end surface are fixedly connected with telescopic cylinder 4, telescopic cylinder 4 lower end extends lower plate 3 lower end surface and is connected with telescopic rod 401, telescopic rod 401 lower end is fixedly connected with fixed block 404, and two fixed blocks 404 between horizontal alignment are rotatably connected with compression roller 5, and the lower end telescopic end of hydraulic rod 202 passes through C type support frame 2 and is fixedly connected with the middle part of lower plate 3 upper end, and the upper end of telescopic rod 401 extends into telescopic cylinder 4 inside and is fixedly connected with limit sheet 402, and spring 403 is arranged in telescopic cylinder 4 inside and on the upper end of limit sheet 402, lower plate 3 is lowered simultaneously with telescopic cylinder 4, and then fixed block 404 is lowered simultaneously, so that the front and rear two compression rollers 5 of lower plate 3 lower end contact the front and rear ends of plastic film cutting position respectively, when lower plate 3 continues to descend, because compression roller 5 is limited to descend, then the upper end of telescopic rod 401 gradually extends into telescopic cylinder 4 inside and compresses spring 403, by the restoring force of spring 403, the pressure is applied to telescopic rod 401 downwards, then compression roller 5 gradually applies pressure to plastic film, and the compression of plastic film is realized.

[0025] Further, the middle part of compression roller 5 is fixedly connected with rotating shaft 501, rotating shaft 501 two ends are inserted into the middle part of two fixed blocks 404 respectively, the outside of one side fixed block 404 is fixedly connected with driving device 6, and rotating shaft 501 one end extends out one side of fixed block 404 and is fixedly connected with the output end of driving device 6, when cutting knife 302 cuts plastic film, rotating shaft 501 is rotated by driving device 6, then rotating shaft 501 drives compression roller 5 rotating to compress plastic film, so that two compression rollers 5 are rotated to outside respectively, stretch plastic film cutting position, make plastic film cutting position keep tight before cutting by cutting knife 302.

[0026] Working principle: when in use, firstly, the plastic film to be cut is placed on the cutting table 1. Then, the hydraulic rod 202 is started to push the lower pressing plate 3 to descend along the guide rod 301 guided in the guide hole 201. As the lower pressing plate 3 descends, the cutting knife 302 at the lower end thereof gradually approaches the plastic film, ready for cutting. Meanwhile, the descent of the lower pressing plate 3 also drives the telescopic cylinder 4 and the telescopic rod 401 inside thereof to descend, so that the front and rear two pressing rollers 5 at the lower end of the lower pressing plate 3 contact the plastic film at the position before and after the cutting. Since the descent of the pressing rollers 5 is limited, the telescopic rod 401 will gradually extend into the telescopic cylinder 4 and compress the spring 403, and the spring 403 is used to apply appropriate pressure to the plastic film by the restoring force, so as to realize the pressing of the plastic film. Before the cutting knife 302 contacts the plastic film, the driving device 6 is started, and the output end of the driving device 6 drives the rotating shaft 501 to rotate, and then drives the two pressing rollers 5 to rotate and respectively stretch the plastic film outward, so that the plastic film is kept in a taut state at the cutting position. At this time, the hydraulic rod 202 continues to push the lower pressing plate 3 to descend, so that the cutting knife 302 cuts the taut plastic film. After cutting is completed, the hydraulic rod 202 drives the lower pressing plate 3 to ascend, and the restoring force of the spring 403 drives the telescopic rod 401 and the pressing rollers 5 to reset, and the whole cutting process is completed.

[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A plastic film cutting device with a taut structure, comprising a cutting table (1), characterized in that: The cutting table (1) upper end middle part is fixedly connected with C type support frame (2), C type support frame (2) upper end middle part is fixedly connected with hydraulic rod (202), C type support frame (2) inner side upper end is provided with down pressure plate (3), down pressure plate (3) lower end middle part is fixedly connected with cutting knife (302), the front and rear ends of both sides of down pressure plate (3) upper end surface are fixedly connected with telescopic cylinder (4), telescopic cylinder (4) lower end extends down pressure plate (3) lower end surface and is connected with telescopic rod (401), telescopic rod (401) lower end is fixedly connected with fixed block (404), the horizontally aligned two fixed blocks (404) are rotatably connected with pressure roller (5) between.

2. The plastic film cutting device with a taut structure according to claim 1, characterized in that: The front and rear ends of both sides of C type support frame (2) upper end surface are provided with guide hole (201), the front and rear ends of both sides of down pressure plate (3) upper end surface are fixedly connected with guide rod (301).

3. The plastic film cutting apparatus having a taut structure according to claim 2, characterized in that: The four guide rods (301) of down pressure plate (3) upper end respectively pass four guide holes (201) and extend out C type support frame (2) upper end surface.

4. The plastic film cutting device having a taut structure according to claim 1, wherein: Hydraulic rod (202) lower end telescopic end passes through C type support frame (2) and is fixedly connected with down pressure plate (3) upper end middle part.

5. The plastic film cutting device having a taut structure according to claim 1, wherein: Telescopic rod (401) upper end extends into telescopic cylinder (4) inside and is fixedly connected with limit sheet (402), telescopic cylinder (4) inside and in limit sheet (402) upper end is provided with spring (403).

6. The plastic film cutting apparatus having a taut structure according to claim 1, wherein: The middle part of pressure roller (5) is fixedly connected with rotating shaft (501), and the both ends of rotating shaft (501) are respectively inserted into the middle parts of two fixed blocks (404).

7. The plastic film cutting apparatus having a taut structure according to claim 6, wherein: The outer side of one fixed block (404) is fixedly connected with driving device (6), and one end of rotating shaft (501) extends out one side of fixed block (404) and is fixedly connected with the output end of driving device (6).

Images