Screen changing device of extruder for EVA (Ethylene Vinyl Acetate) adhesive film production

Abstract

The utility model discloses an extruder screen changing device for EVA (Ethylene Vinyl Acetate) adhesive film production, which relates to the technical field of EVA adhesive film production, and comprises a base and an extruder main body, the right side wall of the extruder main body is connected with a fixed box and an extrusion head, the inside of the fixed box is vertically connected with a mounting frame, the inner wall of the mounting frame is provided with a filter screen, and the outer wall of the fixed box is provided with a fixed seat; a lifting toothed plate is vertically and slidably connected into the fixing base, a mounting box is arranged at the top of the lifting toothed plate, a transverse pull rod is slidably connected into the mounting box, a clamping block is mounted at the end, close to the mounting frame, of the transverse pull rod, and a clamping groove matched with the clamping block is formed in the side wall of the mounting frame. The lifting toothed plate can drive the mounting box and the mounting frame to move, the filter screen in the mounting frame can be rapidly separated from the fixing box, the clamping block can be far away from the clamping groove through sliding of the transverse pull rod in the mounting box, the mounting frame can be rapidly taken down after the mounting frame is not limited by the clamping block, and the filter screen can be conveniently cleaned and replaced; and the filtering effect of the extruder for EVA adhesive film production is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of EVA film production, in particular to an extruder screen changing device for EVA film production. Background Art

[0002] EVA film is a commonly used plastic film. It is a high-viscosity film material sheet made of polymer resin (ethylene-vinyl acetate copolymer) as the main raw material, adding special additives, and processed by special equipment. During the production of EVA film, an extruder is required. The extruder allows the EVA film to be cooled and shaped during the transmission process.

[0003] Publication No. CN203622926U discloses an EVA film extruder with a bidirectional feed adjustment function. The extruder comprises a main barrel, an extrusion screw disposed within the main barrel, and a drive motor for driving the extrusion screw. The main barrel has a feed hopper at the feed end, a downward-pointing conical bottom with an opening at the apex. A die is provided at the discharge end of the main barrel. An additional feed barrel is connected to the bottom of the feed hopper. An adjustment plate is provided at the intersection of the additional feed barrel and the bottom of the feed hopper. One end of the adjustment plate extends into the feed hopper, while the other end extends into the additional feed barrel. A flow sensor for generating material flow information is located at the die outlet, and an adjustment motor is provided outside the feed hopper to receive this information and drive the adjustment plate. This EVA film extruder offers the advantages of significantly changing the extruder feed in a short period of time and adapting to fluctuations in molten resin production.

[0004] Most of the existing EVA film production extruders are usually equipped with a filter screen to filter out impurities. As the use time increases, the impurities will block the filter screen, thereby affecting the filtering effect of the filter screen. Therefore, manual personnel are required to replace the filter screen regularly. However, most of the existing filter screens are directly installed on the extrusion head of the extruder. When replacing, the entire extrusion head needs to be removed, which is cumbersome to operate, has low work efficiency, and is inconvenient to replace the filter screen. For this reason, we propose a filter screen changing device for an EVA film production extruder. Utility Model Content

[0005] The purpose of the utility model is to provide an extruder screen changing device for EVA film production, so as to solve the problem in the above background technology that the entire extruder head needs to be removed when replacing the filter screen, resulting in troublesome operation and low work efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A screen changing device for an extruder used in the production of EVA films comprises a base, an extruder body is mounted on the base, a feeding hopper is provided at the top left end of the extruder body, a fixing box and an extrusion head are connected and connected to the right side wall of the extruder body, an opening is formed in the fixing box, and a mounting frame is vertically connected to the opening, and a filter screen is provided on the inner wall of the mounting frame;

[0008] A fixing seat is installed on the outer wall of the fixing box, and a lifting gear plate is vertically slidably connected in the fixing seat. A mounting box is provided on the top of the lifting gear plate, and a horizontal tie rod is slidably connected in the mounting box. Both ends of the horizontal tie rod pass through the two ends of the mounting box. A clamping block is installed on the end of the horizontal tie rod close to the mounting frame, and a clamping groove adapted to the clamping block is provided on the side wall of the mounting frame.

[0009] Furthermore: a reduction motor is installed on the outer wall of the fixed seat, and a rotating shaft is provided at the output end of the reduction motor, a rotating gear is sleeved on the rotating shaft, and the rotating gear is meshed and connected with the lifting gear plate.

[0010] Furthermore: the outer wall of the cross tie rod is connected with a sliding plate, the sliding plate is slidably connected to the inner wall of the installation box, the outer wall of the cross tie rod is sleeved with a compression spring, and the compression spring is located between the outer side surface of the sliding plate and the inner wall of the installation box.

[0011] Furthermore: a heat-insulating handle is installed on the top of the installation frame.

[0012] Furthermore, one end of the horizontal tie rod away from the clamping block is connected with a pull ring, and the handheld end of the pull ring is covered with an anti-slip rubber sleeve.

[0013] Furthermore: the outer surface of the clamping block is provided with an anti-slip pad, and the inner wall of the clamping groove is embedded with staggered protrusions.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model can drive the rotating gear on the rotating shaft to rotate through the operation of the reduction motor. Since the rotating gear is meshed and connected with the lifting tooth plate, the lifting tooth plate can be lifted and lowered, thereby driving the installation box and the installation frame to move, so that the filter screen in the installation frame can be quickly separated from the fixed box. Through the action of the horizontal pull rod, the sliding plate and the compression spring in the installation box, the clamping block can be kept away from the clamping groove. After the installation frame is no longer restricted by the clamping block, the installation frame can be quickly removed, which is convenient for cleaning and replacing the filter screen, thereby improving the filtering effect of the extruder used for EVA film production and improving the quality of the finished EVA film. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the fixing box and the extrusion head of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the side connection structure of the fixing seat, the installation box and the installation frame of the present invention.

[0019] In the figure: 1. Base; 2. Extruder body; 3. Feeding hopper; 4. Fixing box; 5. Extrusion head; 6. Mounting frame; 7. Filter; 8. Heat-insulating handle; 9. Fixing seat; 10. Lifting gear plate; 11. Mounting box; 12. Speed ​​reducer motor; 13. Rotating gear; 14. Tie rod; 15. Compression spring; 16. Sliding plate; 17. Clamping block; 18. Clamping groove. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] Example 1:

[0022] See also Figure 1-3 The utility model provides a technical solution: a screen changing device for an extruder for producing EVA film, comprising a base 1, an extruder body 2 is mounted on the base 1, a feeding hopper 3 is provided at the top left end of the extruder body 2, a fixing box 4 and an extrusion head 5 are connected to the right side wall of the extruder body 2, an opening is provided in the fixing box 4, and a mounting frame 6 is vertically connected in the opening, and a filter screen 7 is provided on the inner wall of the mounting frame 6; the extruder used in the production of EVA film is an existing device, and the specific structure and working principle are not elaborated here. Before use, the electrical ends of each electrical device are electrically connected to the external power supply and the electrical end of the controller, the top of the mounting frame 6 passes through the top wall of the fixing box 4, and the filter screen 7 filters the raw materials extruded by the extrusion head 5;

[0023] The outer wall of the fixed box 4 is installed with a fixed seat 9, and a lifting tooth plate 10 is vertically slidably connected in the fixed seat 9. The top of the lifting tooth plate 10 is provided with a mounting box 11, and a horizontal tie rod 14 is slidably connected in the mounting box 11. The two ends of the horizontal tie rod 14 pass through the two ends of the mounting box 11. A clamping block 17 is installed at one end of the horizontal tie rod 14 close to the mounting frame 6, and a clamping groove 18 adapted to the clamping block 17 is opened on the side wall of the mounting frame 6; the fixed seat 9 is fixedly connected to the outer wall of the fixed box 4, and the lifting tooth plate 10 is connected to the mounting box 11. The fixed connection is driven by the lifting and lowering of the lifting tooth plate 10, which drives the installation box 11 and the installation frame 6 to rise and fall, so that the filter screen 7 in the installation frame 6 can be quickly separated from the fixed box 4. By pulling the horizontal tie rod 14 in the installation box 11, the clamping block 17 can be kept away from the clamping groove 18. After the installation frame 6 is no longer restricted by the clamping block 17, the installation frame 6 can be quickly removed, which is convenient for cleaning and replacing the filter screen 7 in the installation frame 6, thereby improving the filtering effect of the extruder used in the production of EVA film and improving the quality of the finished product of EVA film.

[0024] Among them, preferably, a reduction motor 12 is installed on the outer wall of the fixed seat 9, and the output end of the reduction motor 12 is provided with a rotating shaft, a rotating gear 13 is sleeved on the rotating shaft, and the rotating gear 13 is meshed and connected with the lifting gear plate 10; the operation of the reduction motor 12 can drive the rotating gear 13 on the rotating shaft to rotate forward or reverse, and the lifting gear plate 10 is provided with multiple groups of meshing grooves adapted to the rotating gear 13. Therefore, the operation of the reduction motor 12 can drive the lifting gear plate 10 to rise and fall in the fixed seat 9.

[0025] Preferably, the outer wall of the cross-tie rod 14 is connected with a sliding plate 16, and the sliding plate 16 is slidably connected to the inner wall of the installation box 11. The outer wall of the cross-tie rod 14 is sleeved with a compression spring 15, and the compression spring 15 is located between the outer side surface of the sliding plate 16 and the inner wall of the installation box 11; the cross-tie rod 14 is fixedly connected to the locking block 17, and the sliding plate 16 can be driven to move outward by pulling the cross-tie rod 14 outward. At this time, the compression spring 15 is compressed, and the clamping block 17 is close to the side wall of the installation box 11. At this time, the installation frame 6 can be aligned with the opening at the top of the fixed box 4 for installation. After the clamping groove 18 is aligned with the clamping block 17, after loosening the cross-tie rod 14, the compressed compression spring 15 can automatically return to its position, so that the clamping block 17 moves and is connected to the clamping groove 18, that is, the position of the installation box 11 and the installation frame 6 is fixed, which is convenient for the staff's operation.

[0026] Preferably, a heat-insulating handle 8 is installed on the top of the installation frame 6 ; the heat-insulating handle 8 makes it convenient for the staff to lift the installation frame 6 .

[0027] Preferably, the end of the tie rod 14 away from the clamping block 17 is connected to a pull ring, and the handheld end of the pull ring is covered with a non-slip rubber sleeve; the pull ring facilitates pulling the tie rod 14, and the non-slip rubber sleeve plays an anti-slip role, preventing the hand from slipping when holding the pull ring.

[0028] Example 2:

[0029] Reference Figure 3 This embodiment is different from the first embodiment in that: the outer surface of the clamping block 17 is provided with an anti-slip pad, and the inner wall of the clamping groove 18 is embedded with staggered protrusions; the anti-slip pad and the protrusion increase the friction force of the connection between the two, thereby improving the stability of the installation box 11 and the installation frame 6 after they are fixed.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screen changing device for an extruder for producing EVA film, comprising a base (1), an extruder body (2) mounted on the base (1), a feeding hopper (3) provided at the top left end of the extruder body (2), and characterized in that: The right side wall of the extruder body (2) is connected to a fixed box (4) and an extrusion head (5) which are arranged in communication. An opening is provided in the fixed box (4), and a mounting frame (6) is vertically connected to the opening. A filter screen (7) is provided on the inner wall of the mounting frame (6); The outer wall of the fixed box (4) is installed with a fixed seat (9), and a lifting tooth plate (10) is vertically slidably connected in the fixed seat (9), a mounting box (11) is provided on the top of the lifting tooth plate (10), and a horizontal tie rod (14) is slidably connected in the mounting box (11), both ends of the horizontal tie rod (14) pass through both ends of the mounting box (11), a clamping block (17) is installed at one end of the horizontal tie rod (14) close to the mounting frame (6), and a clamping groove (18) adapted to the clamping block (17) is provided on the side wall of the mounting frame (6); A reduction motor (12) is installed on the outer wall of the fixing seat (9), and a rotating shaft is provided at the output end of the reduction motor (12). A rotating gear (13) is sleeved on the rotating shaft, and the rotating gear (13) is meshed and connected with the lifting gear plate (10); The outer wall of the cross-tie rod (14) is connected with a sliding plate (16), and the sliding plate (16) is slidably connected to the inner wall of the installation box (11).

2. The screen changing device for an extruder for producing EVA film according to claim 1, characterized in that: The outer wall of the cross-tie rod (14) is sleeved with a compression spring (15), and the compression spring (15) is located between the outer side surface of the sliding plate (16) and the inner wall of the installation box (11).

3. The screen changing device for an extruder for producing EVA film according to claim 1, characterized in that: A heat-insulating handle (8) is installed on the top of the installation frame (6).

4. The screen changing device for an extruder for producing EVA film according to claim 1, characterized in that: One end of the horizontal tie rod (14) away from the clamping block (17) is connected to a pull ring, and the handheld end of the pull ring is covered with an anti-slip rubber sleeve.

5. The screen changing device for an extruder for producing EVA film according to claim 1, characterized in that: The outer surface of the clamping block (17) is provided with an anti-slip pad, and the inner wall of the clamping groove (18) is embedded with staggered protrusions.

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