Extrusion film cooling adjusting device

Abstract

The utility model relates to the technical field of plastic film processing, in particular to an extrusion film cooling adjusting device which comprises two oppositely-arranged supporting plates and a cooling roller rotationally connected between the two supporting plates, the supporting plates are detachably connected with a plurality of extrusion rollers which are arranged around the outer circumference of the cooling roller, and gaps exist between the extrusion rollers and a film. The circumferential surface of the extrusion roller is gradually far away from the surface of the film in the film width direction from the film moving direction; by means of the concave structures and the inclined structures of the peripheral walls of the extrusion rollers, the gaps between the extrusion rollers and the film are gradually reduced when getting close to the edge position from the middle of the film, and meanwhile the gaps between the multiple extrusion rollers arranged in the moving direction of the film and the film are gradually reduced in the arrangement direction of the extrusion rollers. The thickness of the edge of the film is gradually flattened outwards, it is ensured that the thicknesses of all the positions of the film are relatively consistent, and damage such as pits and cracks on the surface of the film caused by different cooling efficiency of all the positions of the film during cooling is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic film processing, specifically to an extrusion film cooling adjusting device. BACKGROUND

[0002] The film is a kind of thin sheet formed by taking plastic or rubber and other materials as raw material, melting by heating, extruding plastic shape, and then cooling, and it is also widely used in electronic and semiconductor, photovoltaic solar cell, optical coating, packaging and preservation, building and industry and other fields due to the difference of raw material and additive and other materials used, and different films have different physical and chemical properties.

[0003] Among them, the car cover is a protective cover specially designed for cars, mainly used for protecting the car body paint, preventing scratches, corrosion, etc., which can effectively isolate the contact between the car paint and the external environment, thereby prolonging the service life of the car paint, and at the same time, it can prevent the car paint from fading and oxidizing under the irradiation of ultraviolet rays, and it can also be used according to the user's preference to cover different positions of the vehicle with different colored car covers, further increasing the appearance effect of the vehicle, wherein the main material of the car cover is the film, and various additives or auxiliary materials are added to the film to increase its protection effect and ornamental effect, so there are higher requirements for the thickness, transparency, color saturation and surface flatness of the film when producing the film for the car cover.

[0004] Generally, the production process of the film is to heat and melt the raw material through an extruder, then extrude the flat and not completely cooled film product through an extrusion die, make the film product around the cooling roller and release heat, and then cool and shape the film product, when it is transferred from the extrusion die to the cooling roller, the film product needs to be pulled by the cooling roller, so the film product itself is subjected to tension, and when it is subjected to tension, necking phenomenon may occur (when subjected to tension, the width of the film product at the middle position of its length direction decreases), and the thickness of the film at the edge position on the cooling roller increases, so that different thickness positions exist in the width direction of the film during cooling, and the shrinkage rate of the film as a whole is different due to the different cooling efficiency of the film at different thicknesses during cooling, especially at the edge position of the thickness change, small defects such as bending, cracking and hole depression are prone to occur, so the edge area needs to be cut and the qualified area position is left as the car cover preparation material, resulting in low production efficiency.

[0005] Therefore, a new technical solution is needed to solve the above problems. UTILITY MODEL CONTENT

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an extrusion film cooling adjusting device.

[0007] The technical problem of the utility model is solved through the following technical scheme: the utility model relates to an extrusion film cooling adjusting device, which comprises two oppositely arranged supporting plates and a cooling roller rotatably connected between the two supporting plates, a plurality of extrusion rollers are detachably connected to the supporting plates and are arranged around the outer circumference of the cooling roller and have a gap with the film, the extrusion rollers are arranged to be inclined to the film and the circumferential surface of the extrusion rollers gradually moves away from the surface of the film along the width direction of the film from the moving direction of the film, and the gap between the extrusion rollers and the film gradually increases from the middle position of the film to the edge position of the film.

[0008] By adopting the above technical scheme, when the film is extruded from the die opening of the extrusion die and cooled around the cooling roller, the film edge thick position on the cooling roller is gradually flattened by the inclined arrangement of the extrusion rollers and the gradually increased gap between the extrusion rollers and the film edge position, the film edge is flattened by the extrusion rollers, the film edge thick position is extruded outward by the surface of the extrusion rollers, the thickness of the film in the width direction is uniformly distributed, the cooling efficiency of the film at each position is the same during cooling, the surface of the film is prevented from being damaged due to different cooling shrinkage amounts of each part, and the output efficiency is improved.

[0009] The utility model is further provided with: the gap between the extrusion rollers and the film gradually decreases along the moving direction of the film.

[0010] By adopting the above technical scheme, the gap between the extrusion rollers and the film gradually decreases, so that each extrusion roller only extrudes a certain thickness of the film edge position, the film edge is gradually flattened, the film edge position is prevented from being damaged due to one-time flattening, and the output efficiency of the film is further improved.

[0011] The utility model is further provided with: the extrusion roller is a rotary body, and an annular recess is formed on the circumferential surface of the extrusion roller and forms the gap between the extrusion roller and the film.

[0012] By adopting the above technical scheme, the extrusion roller can rotate and extrude the film along the thickness direction of the film when the extrusion roller extrudes the film edge, the relative sliding distance between the extrusion roller and the film surface is reduced, and the damage to the film surface is reduced.

[0013] The utility model is further provided with: the extrusion roller is a rotary body, and an annular recess is formed on the circumferential surface of the extrusion roller and forms the gap between the extrusion roller and the film.

[0014] By adopting the technical scheme, the rotation power of the extrusion roller is provided by the servo motor, the rotation power of the extrusion roller is prevented from being provided by the friction force between the film and the extrusion roller, the friction force between the extrusion roller and the film is reduced, and the protection effect on the film surface is further increased.

[0015] The utility model further sets up: one connecting plate is detachably installed to the side of two support plates far from each other, the support plate side wall is penetrated with the fixed groove of semicircle ring, the connecting plate is fixedly connected with the positioning block that goes into the fixed groove and abuts to the fixed groove inner wall, a plurality of connecting blocks are fixedly connected to the side of the connecting plate far from the positioning block, the servo motor is installed on the connecting block, the connecting shaft penetrates the positioning block, the connecting plate and the connecting block and is fixedly connected with the servo motor output shaft.

[0016] By adopting the technical scheme, the rotation power of the extrusion roller is provided by the servo motor, the rotation power of the extrusion roller is prevented from being provided by the friction force between the film and the extrusion roller, the friction force between the extrusion roller and the film is reduced, and the protection effect on the film surface is further increased.

[0017] The utility model further sets up: the extrusion roller is located in the interval of the quarter of a circle after the film and cooling roller contact starting point.

[0018] By adopting the technical scheme, the rotation power of the extrusion roller is provided by the servo motor, the rotation power of the extrusion roller is prevented from being provided by the friction force between the film and the extrusion roller, the friction force between the extrusion roller and the film is reduced, and the protection effect on the film surface is further increased.

[0019] In summary, the utility model has the following beneficial effects:

[0020] The recessed structure of the extrusion roller peripheral wall and the inclined structure gradually reduce the gap between the extrusion roller and the film from the middle to the edge of the film, and the gap between the several extrusion rollers arranged along the moving direction of the film and the film is also gradually reduced along the arrangement direction, which gradually flattens the thickness of the film edge position outward, ensures the relative consistency of the thickness of the film at each position, and prevents the film surface from being damaged due to different cooling efficiencies of the film at each position during cooling. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a structure schematic drawing;

[0022] Figure 2 The utility model discloses a front view schematic drawing;

[0023] Figure 3 This is a top view of the present invention;

[0024] Figure 4 This is a schematic diagram of the support plate in this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the connecting plate, connecting shaft, and extrusion roller in this utility model.

[0026] In the picture:

[0027] 11. Support plate; 12. Connecting plate; 13. Connecting block; 14. Servo motor; 15. Fixing groove; 16. Connecting shaft; 17. Extrusion roller; 18. Positioning block; 19. Film; 20. Cooling roller. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings of the embodiments thereof. Example

[0029] This is a cooling and adjusting device for extruded films, such as Figures 1 to 5 As shown, there are two opposing support plates 11 and a cooling roller 20 rotatably connected between them. Several extrusion rollers 17 are detachably connected to the support plates 11, which are arranged around the outer circumference of the cooling rollers 20 and have gaps between them and the film 19. The extrusion rollers 17 are inclined to the film 19 and their circumferential surfaces gradually move away from the surface of the film 19 along the width direction of the film 19 from the direction of film movement. The gap between the extrusion rollers 17 and the film 19 gradually increases from the middle position of the film 19 to the edge position of the film 19. The gap between the extrusion rollers 17 distributed along the direction of film movement and the film 19 gradually decreases. The extrusion rollers 17 are rotating bodies and have annular recesses on their circumferential surfaces, forming gaps between the extrusion rollers 17 and the film 19.

[0030] like Figures 3 to 5 As shown, a connecting shaft 16 is fixedly connected to the end face of the extrusion roller 17 away from the film 19. A servo motor 14 is mounted on the support plate 11. The output shaft of the servo motor 14 is coaxially and fixedly connected to the connecting shaft 16 on the extrusion roller 17. A connecting plate 12 is detachably installed on each of the two support plates 11 on their respective sides away from each other. A semi-circular fixing groove 15 passes through the side wall of the support plate 11. A positioning block 18 is fixedly connected to the connecting plate 12, extending into the fixing groove 15 and abutting against the inner wall of the fixing groove 15. Several connecting blocks 13 are fixedly connected to the side of the connecting plate 12 away from the positioning block 18. The servo motor 14 is mounted on the connecting block 13. The connecting shaft 16 passes through the positioning block 18, the connecting plate 12 and the connecting block 13 and is fixedly connected to the output shaft of the servo motor 14. The extrusion roller 17 is located within a quarter-circle arc after the contact point between the film 19 and the cooling roller 20.

[0031] The corresponding connecting block 13 is clamped into the fixing groove 15, and the connection between the outer connecting plate 12 and the supporting plate 11 is achieved by screwing, then the film 19 extruded from the extrusion die is wound on the cooling roller 20, cooling water is supplied into the cooling roller 20, and the cooling roller 20 is rotated to pull and cool the film 19, then the connecting shaft 16 is inserted into the corresponding holes of the positioning block 18 and the connecting plate 12, and the extrusion roller 17 is located on the surface of the film 19, then the servo motor 14 is installed on the connecting block 13 and coaxially connected with the connecting shaft 16, the servo motor 14 is started to drive the connecting shaft 16 and the extrusion roller 17 to rotate;

[0032] The recessed structure of the extrusion roller 17 and the inclined arrangement structure gradually reduce the gap between the extrusion roller 17 and the film 19 from the middle to the edge of the film 19, and the gap between the extrusion roller 17 and the film 19 arranged along the moving direction of the film 19 is also gradually reduced along the arrangement direction, so that the thickness of the edge of the film 19 is gradually flattened outward, ensuring that the thickness of the film 19 at each position is relatively uniform, preventing the cooling efficiency of the film 19 at each position from being different during cooling, and causing damage such as concave, crack, etc. on the surface of the film 19, wherein the extrusion roller 17 is a rotating body structure, that is, the servo motor 14 drives the extrusion roller 17 to rotate while the film 19 edge thickness is extruded on the surface of the extrusion roller 17, the rotation speed of the extrusion roller 17 is controlled to reduce the movement of the extrusion roller 17 relative to the film 19, thereby reducing the friction force of the extrusion roller 17 on the surface of the film 19, further increasing the product quality, and converting the volume of the film 19 edge with large thickness into the width of the film 19, which can be used to adjust the film 19 at the position with relatively poor quality during subsequent processing of the film 19, further increasing the use effect;

[0033] The positioning effect of the connecting plate 12, the connecting shaft 16 and the extrusion roller 17 is further increased by the abutting structure of the positioning block 18 and the inner wall of the fixing groove 15, and the precision control of the extrusion amount of the extrusion roller 17 on the edge of the film 19 is increased.

[0034] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. An extrusion film cooling adjusting device, comprising two oppositely arranged support plates (11) and a cooling roller (20) rotatably connected between the two support plates, characterized in that: The support plate (11) is detachably connected with a plurality of extrusion rollers (17) which are arranged around the outer circumference of the cooling roller (20) and have a gap with the film (19), the extrusion roller (17) is arranged to tilt the film (19) and the circumferential surface thereof gradually moves away from the surface of the film (19) along the width direction of the film (19) from the moving direction of the film (19), and the gap between the extrusion roller (17) and the film (19) gradually increases from the middle position of the film (19) to the edge position of the film (19).

2. An extrusion film cooling adjustment device according to claim 1, characterized in that: The gap between the plurality of extrusion rollers (17) and the film (19) gradually decreases along the moving direction of the film (19).

3. An extruded film cooling adjustment device according to claim 1, wherein: The extrusion roller (17) is a rotating body, and an annular recess is formed on the circumferential surface thereof to form the gap between the extrusion roller (17) and the film (19).

4. An extruded film cooling adjustment device according to claim 3, wherein: The end surface of the extrusion roller (17) away from the film (19) is fixedly connected with a connecting shaft (16), a servo motor (14) is installed on the support plate (11), and the output shaft of the servo motor (14) is coaxially fixedly connected with the connecting shaft (16) on the extrusion roller (17).

5. An extruded film cooling adjustment device according to claim 4, wherein: The side of each of the two support plates (11) away from each other is detachably installed with a connecting plate (12), a semicircular fixing groove (15) is formed through the side wall of the support plate (11), a positioning block (18) is fixedly connected on the connecting plate (12) and extends into the fixing groove (15) and abuts against the inner wall of the fixing groove (15), a plurality of connecting blocks (13) are fixedly connected on the side of the connecting plate (12) away from the positioning block (18), the servo motor (14) is installed on the connecting block (13), and the connecting shaft (16) extends through the positioning block (18), the connecting plate (12) and the connecting block (13) and is fixedly connected with the output shaft of the servo motor (14).

6. An extruded film cooling adjustment device according to claim 1, wherein: The extrusion roller (17) is located in the interval of the fourth quadrant of the circle after the contact starting point of the film (19) and the cooling roller (20).

Images