Bar-breaking-free screen changing device

Abstract

The utility model relates to the field of plastic processing equipment, and discloses a strip-breaking-free screen changing device which comprises two containing holes, the two containing holes are formed in the top face of a filter box, a die head is connected to the front side of the filter box in a threaded mode, two hydraulic cylinders are fixed to the top face of the filter box, a blocking plate is fixed to one end of a telescopic rod of each hydraulic cylinder, and a baffle is fixed to the other end of the telescopic rod of each hydraulic cylinder. The baffle plate is slidably inserted in the accommodating hole, a feeding hole is formed in the rear side of the baffle plate, two mounting grooves are formed in the inner wall of the feeding hole, a limiting ring is slidably arranged on the inner wall of the feeding hole, and a filter screen is arranged on the inner wall of the feeding hole in a clamped mode. According to the filter screen replacing device, under the action of the limiting ring, the L-shaped plate, the first spring and the second spring, an operator can conveniently replace the filter screen from the feeding port, the phenomenon that the filter screen is blocked due to material residues is effectively prevented, the filter screen replacing efficiency is improved, and then labor force and time cost are saved.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic processing equipment, specifically to a non-strip screen changing device. Background Technology

[0002] With the increasing consumption of plastic products, the amount of waste plastic is also increasing. The recycling of waste plastic has been widely adopted by modern chemical enterprises. Plastic extruders are an indispensable production equipment for plastic recycling and granulation. Waste plastic can be recycled and granulated through plastic extruders, which can effectively recycle waste plastic and improve the living environment. During the granulation process, when the raw materials contain recycled materials or the cleanliness of the materials is required to be high, a screen changing device needs to be added between the extrusion cylinder and the wire drawing head.

[0003] Chinese patent CN206690504U discloses a screen replacement device that does not break the screen strips. It includes a front wall panel, a rear wall panel, a middle frame, a strip output plate, two snap-fit ​​shells, two screen plates, and two cylinders. The front and rear wall panels are spaced apart by the middle frame, and two slots that are adapted to the screen plates are formed between the front and rear wall panels. The two cylinders are mounted on the top of the middle frame by a mounting plate and can drive the corresponding screen plates to perform lifting and lowering actions. Heating rods are inserted into the front and rear wall panels.

[0004] In the above scheme, two screens are set up to form two workstations, which can work interactively or simultaneously. A heating rod is also added to prevent the rubber material from cooling and cutting off the material, effectively improving the flowability of the rubber material. However, it has the following disadvantages: during the screen changing process, the filter screen is easily stuck in the feed port of the screen plate due to material residue. Tools are needed to replace the filter screen, which increases the labor and time costs of filter screen replacement. Utility Model Content

[0005] The purpose of this invention is to provide a non-strip screen replacement device to solve the problem that during screen replacement, the filter screen is easily stuck in the feed inlet of the screen plate due to material residue, requiring tools to replace the filter screen, which increases the labor and time costs of filter screen replacement.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a non-strip screen changing device, comprising two receiving holes, both of which are opened on the top surface of a filter box. A die head is threadedly connected to the front side of the filter box. Two hydraulic cylinders are fixed on the top surface of the filter box. A blocking plate is fixed to one end of the telescopic rod of the hydraulic cylinder. The blocking plate is slidably inserted into the receiving hole. A feed inlet is opened on the rear side of the blocking plate. Two mounting grooves are opened on the inner wall of the feed inlet. A limit ring is slidably provided on the inner wall of the feed inlet. A filter screen is snapped onto the inner wall of the feed inlet. A first spring is fixed on the inner wall of the mounting groove. The other end of the first spring is fixed to the limit ring. Two L-shaped grooves are opened on the rear side of the blocking plate. The L-shaped grooves are connected to the feed inlet. An L-shaped plate is slidably provided on the inner wall of the L-shaped groove. A second spring is fixed on the L-shaped plate. The other end of the second spring is fixed to the inner wall of the L-shaped groove.

[0007] Preferably, two limiting grooves are provided on the left and right sides of the inner wall of the receiving hole, and limiting strips are fixed on the left and right sides of the blocking plate, with the limiting strips slidably connected to the limiting grooves.

[0008] Preferably, the front side of the filter box is provided with a plurality of threaded grooves, and the front side of the mold head is provided with a plurality of positioning holes. The positioning holes correspond to the threaded grooves, and a fixing bolt is slidably inserted into the inner wall of the positioning hole. The fixing bolt passes through the positioning hole and is threadedly connected to the threaded groove.

[0009] Preferably, a plurality of rubber strips are fixed to the inner wall of each receiving hole, and the rubber strips are in contact with the outer wall of the baffle plate.

[0010] Preferably, the feed channel and discharge channel in the filter box are both Y-shaped and connected to the receiving hole.

[0011] Preferably, the number of rubber strips for the receiving holes is two pairs, and they are distributed vertically at the feed end and discharge end of the filter box.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Through the action of the limiting ring, L-shaped plate, first spring, and second spring, operators can easily replace the filter screen from the feed inlet, effectively preventing the filter screen from "jamming" due to material residue, thereby improving the filter screen replacement efficiency and saving labor and time costs. The cooperation of the limiting strip and limiting groove makes the baffle plate more stable when moving up and down, allowing it to move smoothly along a predetermined trajectory, effectively preventing wobbling during up and down movement, thus improving the stability of the baffle plate.

[0014] Second, the fixing bolts allow operators to easily assemble the mold head, enabling them to change the mold head model according to processing needs, ensuring the diversity of material output and thus improving the flexibility and versatility of the filter box. Rubber strips can scrape off material adhering to the outer wall of the baffle plate as it moves up and down, effectively preventing the adhering material from affecting the up-and-down movement of the baffle plate, thereby improving the working efficiency of the baffle plate. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2 This is a breakdown diagram of an embodiment.

[0017] Figure 3 This is a rear view of the barrier plate and limiting strip in an embodiment.

[0018] Figure 4 This is a cross-sectional schematic diagram of the filter box in an embodiment.

[0019] Figure 5 For the example Figure 3 Enlarged diagram of point A in the middle.

[0020] In the diagram: 1. Receiving hole; 2. Filter box; 3. Die head; 4. Hydraulic cylinder; 5. Baffle plate; 6. Feed inlet; 7. Mounting groove; 8. Limiting ring; 9. Filter screen; 10. First spring; 11. L-shaped groove; 12. L-shaped plate; 13. Second spring; 14. Limiting groove; 15. Limiting strip; 16. Threaded groove; 17. Positioning hole; 18. Fixing bolt; 19. Rubber strip. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-5As shown, a non-strip screen changing device includes two receiving holes 1, both of which are located on the top surface of a filter box 2. A die head 3 is threadedly connected to the front side of the filter box 2. Two hydraulic cylinders 4 are fixed to the top surface of the filter box 2. A baffle plate 5 is fixed to one end of the telescopic rod of the hydraulic cylinder 4. The baffle plate 5 is slidably inserted into the receiving hole 1. A feed inlet 6 is provided on the rear side of the baffle plate 5. Two mounting grooves 7 are provided on the inner wall of the feed inlet 6. A limit ring 8 is slidably provided on the inner wall of the feed inlet 6. A filter screen 9 is installed. A first spring 10 is fixed to the inner wall of the mounting groove 7. The other end of the first spring 10 is fixed to the limiting ring 8. Two L-shaped grooves 11 are opened on the rear side of the baffle plate 5. The L-shaped grooves 11 are connected to the feed port 6. An L-shaped plate 12 is slidably installed on the inner wall of the L-shaped groove 11. A second spring 13 is fixed on the L-shaped plate 12. The other end of the second spring 13 is fixed to the inner wall of the L-shaped groove 11. The feed channel and the discharge channel in the filter box 2 are both Y-shaped and connected to the receiving hole 1.

[0023] During use, when replacing the filter screen 9, the operator activates the hydraulic cylinder 4, causing the baffle plate 5 to move vertically under the drive of the hydraulic cylinder 4. After the filter screen 9 is completely removed from the receiving hole 1, the baffle plate 5 will seal and block the original feed end. At this time, the material flow will automatically switch to the backup feed channel to continue transmission. Subsequently, the operator can move the two L-shaped plates 12 to bring them closer together. The L-shaped plates 12 will move backward against the limiting ring 8 under the action of the inclined surface. Thus, the filter screen 9 will be released from constraint under the force of the limiting ring 8, making it detachable. Then, the operator can easily pick up the filter screen 9 for replacement, completing the screen replacement operation. Then, the limiting ring 8 and the L-shaped plate 12 will be reset under the force of the first spring 10 and the second spring 13.

[0024] Under the action of the limiting ring 8, L-shaped plate 12, first spring 10, and second spring 13, the operator can easily replace the filter screen 9 from the feed inlet 6, effectively preventing the filter screen 9 from "jamming" due to material residue, thereby improving the filter screen 9 replacement efficiency and saving labor and time costs.

[0025] like Figures 1-4As shown, two limiting grooves 14 are opened on the left and right sides of the inner wall of the receiving hole 1. Limiting strips 15 are fixed on the left and right sides of the baffle plate 5. The limiting strips 15 are slidably connected to the limiting grooves 14. Several threaded grooves 16 are opened on the front side of the filter box 2. Several positioning holes 17 are opened on the front side of the die head 3. The positioning holes 17 correspond to the threaded grooves 16. Fixing bolts 18 are slidably inserted into the inner wall of the positioning holes 17. The fixing bolts 18 pass through the positioning holes 17 and are threadedly connected to the threaded grooves 16. Several rubber strips 19 are fixed on the inner wall of the receiving hole 1. The rubber strips 19 are in contact with the outer wall of the baffle plate 5. There are two pairs of rubber strips 19 in the receiving hole 1, and they are distributed vertically at the feed end and discharge end of the filter box 2.

[0026] During use, the cooperation between the limiting strip 15 and the limiting groove 14 makes the baffle plate 5 more stable when moving up and down, allowing it to move smoothly along a predetermined trajectory and effectively preventing wobbling during movement, thus improving its stability. The fixing bolts 18 facilitate the assembly of the die head 3 by the operator, allowing for customization of the die head model according to processing requirements, ensuring diverse material output and improving the flexibility and versatility of the filter box 2. The rubber strip 19 scrapes away material adhering to the outer wall of the baffle plate 5 during its up and down movement, effectively preventing the material from affecting its movement and improving its working efficiency.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-strip screen changing device, comprising two receiving holes (1), both receiving holes (1) being formed on the top surface of a filter box (2), characterized in that, The filter box (2) is threadedly connected to a mold head (3) on its front side. Two hydraulic cylinders (4) are fixed on the top surface of the filter box (2). A baffle plate (5) is fixed to one end of the telescopic rod of the hydraulic cylinder (4). The baffle plate (5) is slidably inserted into the receiving hole (1). A feed inlet (6) is provided on the rear side of the baffle plate (5). Two mounting grooves (7) are provided on the inner wall of the feed inlet (6). A limit ring (8) is slidably provided on the inner wall of the feed inlet (6). A retaining ring (8) is snapped onto the inner wall of the feed inlet (6). The filter screen (9) has a first spring (10) fixed on the inner wall of the mounting groove (7). The other end of the first spring (10) is fixed to the limiting ring (8). Two L-shaped grooves (11) are opened on the rear side of the baffle plate (5). The L-shaped grooves (11) are connected to the feed port (6). An L-shaped plate (12) is slidably arranged on the inner wall of the L-shaped groove (11). A second spring (13) is fixed on the L-shaped plate (12). The other end of the second spring (13) is fixed to the inner wall of the L-shaped groove (11).

2. The non-strip screen changing device according to claim 1, characterized in that: The inner wall of the receiving hole (1) has two limiting grooves (14) on both the left and right sides. The left and right sides of the blocking plate (5) are fixed with limiting strips (15), and the limiting strips (15) are slidably connected to the limiting grooves (14).

3. The non-strip screen changing device according to claim 1, characterized in that: The filter box (2) has several threaded grooves (16) on its front side, and the mold head (3) has several positioning holes (17) on its front side. The positioning holes (17) correspond to the threaded grooves (16). The inner wall of the positioning hole (17) is slidably fitted with a fixing bolt (18). The fixing bolt (18) passes through the positioning hole (17) and is threadedly connected to the threaded groove (16).

4. The non-strip screen changing device according to claim 2, characterized in that: The inner wall of each receiving hole (1) is fixed with several rubber strips (19), and the rubber strips (19) are in contact with the outer wall of the baffle plate (5).

5. The non-strip screen changing device according to claim 3, characterized in that: The feed channel and discharge channel in the filter box (2) are both Y-shaped and connected to the receiving hole (1).

6. The non-strip screen changing device according to claim 4, characterized in that: The number of rubber strips (19) in the receiving hole (1) is two pairs, and they are distributed vertically at the feed end and discharge end of the filter box (2).

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