A plastic sheet extruder screen changer

Abstract

The utility model belongs to the technical field of plastic sheet extruder, concretely relates to a plastic sheet extruder screen changing device, including frame, the top fixed mounting of frame has the extruder body, the one end of extruder body is fixedly installed with extrusion mould through screen changing mechanism, wherein, screen changing mechanism includes the mounting flange fixedly installed in the one end of extruder body, the one side of mounting flange is fixedly installed with fixed base through support column, and the switching assembly is rotatably installed between mounting flange and fixed base, and the switching assembly is used for driving filter screen assembly sector motion. The utility model can push the mounting bracket sector motion through hydraulic cylinder, realizes the automatic switching of two filter screen assemblies in mounting bracket, and can avoid the big temperature difference of filter screen assembly and molten plastic through the heating ring set up in cooperation mounting bracket interior.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic sheet extruders, and specifically relates to a screen changing device for a plastic sheet extruder. Background Technology

[0002] In plastic sheet extrusion production, molten plastic needs to pass through a filter screen before passing through the extruder die to remove impurities and unplasticized particles, ensuring the quality of the sheet product. As production progresses, the filter screen gradually becomes clogged, causing increased pressure in the die head, necessitating timely replacement.

[0003] Problems with existing technology: The current traditional method of screen replacement is to manually replace the filter screen after the machine is stopped. This method is not only labor-intensive, but also has a long downtime, which seriously affects production efficiency. In addition, the existing screen replacement device has a complex structure, the screen replacement action is not stable enough, and there is a large temperature difference between the replacement filter screen and the molten plastic during the screen replacement process, which affects the filtration effect. Utility Model Content

[0004] The purpose of this invention is to provide a screen changing device for a plastic sheet extruder, which can automatically switch between two filter screen components in the mounting frame by driving the mounting frame in a fan-shaped motion through a hydraulic cylinder, and avoid large temperature differences between the filter screen components and the molten plastic by cooperating with the heating ring set inside the mounting frame.

[0005] The specific technical solution adopted by this utility model is as follows: A screen changing device for a plastic sheet extruder includes a frame, on the top of which the extruder body is fixedly mounted; An extrusion die is fixedly installed at one end of the extruder body via a screen changing mechanism; The screen changing mechanism includes a mounting flange fixedly installed at one end of the extruder body. A fixed seat is fixedly installed on one side of the mounting flange via a support column. A switching component is rotatably installed between the mounting flange and the fixed seat. The switching component is used to drive the screen assembly to move in a fan shape.

[0006] The support columns are provided in three sets and arranged in a triangular pattern. The switching component is rotatably installed with one of the support columns.

[0007] The switching assembly includes a hydraulic cylinder fixedly mounted on one side of the frame, the top of which is hinged to the mounting bracket, and the hydraulic cylinder is used to push the mounting bracket to rotate on the surface of the support column.

[0008] The mounting bracket has two sets of through slots inside, and both sets of through slots are T-shaped.

[0009] The mounting bracket is correspondingly provided with the filter assembly, and the filter assembly is inserted into the mounting bracket through a through groove.

[0010] The mounting bracket has a first heating ring mounting slot and a second heating ring mounting slot in its through groove, and a magnetic suction slot is also provided inside the mounting bracket.

[0011] A magnetic ring is fixedly installed on the surface of the filter assembly, and the magnetic ring is magnetically connected to the magnetic groove.

[0012] The technical effects achieved by this utility model are as follows: This invention features two filter screen assemblies installed in the through groove of the mounting frame. The bottom of the mounting frame is hinged to the machine frame via a hydraulic cylinder. The mounting frame is rotatably mounted between the mounting flange and the fixed seat via a support column. Therefore, when the hydraulic cylinder is activated, it can drive the mounting frame and the filter screen assemblies to move in a fan-shaped forward and reverse direction, thereby realizing the switching and replacement of the two filter screen assemblies. Compared with manual replacement, there is no need for long-term machine downtime, thus improving production efficiency. At the same time, the screen replacement process is also more stable.

[0013] This invention utilizes a first heating ring mounting slot and a second heating ring mounting slot opened in the T-shaped through groove of the mounting frame. Both the first heating ring mounting slot and the second heating ring mounting slot are equipped with heating rings. Therefore, after the filter screen assembly to be replaced is installed inside the mounting frame by the magnetic suction ring, the filter screen assembly can be heated by activating the heating rings. This reduces the temperature difference between the replaced filter screen assembly and the molten plastic extruded by the extruder body, thereby improving the filtration effect and preventing solidification and blockage on the surface of the filter screen assembly due to excessive temperature difference. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the overall installation structure of this utility model; Figure 2 This is a schematic diagram of the screen-changing mechanism in this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the screen-changing mechanism in this utility model; Figure 4 This is a schematic diagram of the mounting bracket structure in this utility model; Figure 5 This is a schematic diagram of the magnetic ring installation structure in this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Extruder body; 3. Screen changing mechanism; 31. Mounting flange; 32. Switching assembly; 321. Mounting bracket; 322. Filter assembly; 323. Hydraulic cylinder; 324. First heating ring mounting groove; 325. Second heating ring mounting groove; 326. Magnetic suction groove; 33. Fixed base; 34. Support column; 35. Magnetic suction ring; 4. Extrusion die. Detailed Implementation

[0016] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0017] like Figure 1-5 As shown, a screen changing device for a plastic sheet extruder includes a frame 1, and an extruder body 2 is fixedly installed on the top of the frame 1. One end of the extruder body 2 is fixedly mounted with an extrusion die 4 via a screen changing mechanism 3; The screen changing mechanism 3 includes a mounting flange 31 fixedly installed at one end of the extruder body 2. A fixed seat 33 is fixedly installed on one side of the mounting flange 31 via a support column 34. A switching component 32 is rotatably installed between the mounting flange 31 and the fixed seat 33. The switching component 32 is used to drive the filter screen assembly 322 to move in a fan shape.

[0018] See attached document Figure 1 , Figure 2 and Figure 3 In this embodiment, three sets of support columns 34 are arranged in a triangular pattern, and the switching component 32 is rotatably installed with one of the support columns 34.

[0019] In the above embodiment, the arrangement of three sets of support columns 34 allows for a certain installation gap between the mounting flange 31 and the fixed seat 33, enabling the switching assembly 32 to be installed between the mounting flange 31 and the fixed seat 33.

[0020] Furthermore, through holes are concentrically arranged inside the mounting flange 31 and the fixed seat 33, and wear-resistant bushings are provided at the ends of the through holes. The wear-resistant bushings are slidably installed on both sides of the switching assembly 32. In addition, the fixed seat 33 is fixedly installed on one side of the extrusion die 4. Therefore, the molten plastic extruded from the extruder body 2 can enter the interior of the extrusion die 4 through the screen changing mechanism 3 for extrusion molding.

[0021] Based on the above structure, refer to the appendix. Figure 2 , Figure 3 and Figure 4 The switching assembly 32 includes a hydraulic cylinder 323 fixedly mounted on one side of the frame 1. A mounting bracket 321 is hinged to the top of the hydraulic cylinder 323. Therefore, when the hydraulic cylinder 323 is started, the mounting bracket 321 can be pushed to rotate between the mounting flange 31 and the fixed seat 33 through the output shaft of the hydraulic cylinder 323.

[0022] The mounting bracket 321 is rotatably mounted to one of the support columns 34. Therefore, the support column 34 restricts the mounting bracket 321 to drive the filter assembly 322 to perform a fan-shaped movement, thereby realizing the automatic switching of the two filter assemblies 322.

[0023] More specifically, two sets of through slots are provided inside the mounting bracket 321, and both sets of through slots are T-shaped. At the same time, the mounting bracket 321 and the filter assembly 322 are correspondingly set. The filter assembly 322 is inserted into the mounting bracket 321 through the through slots, and the through slots and the structure of the filter assembly 322 are fitted together.

[0024] See attached document Figure 4 and Figure 5 It is worth noting that a first heating ring mounting groove 324 and a second heating ring mounting groove 325 are provided in the through groove of the mounting bracket 321. At the same time, heating rings are fixedly installed inside the first heating ring mounting groove 324 and the second heating ring mounting groove 325. Therefore, after the filter screen assembly 322 is disassembled and replaced, the replaced filter screen assembly 322 can be heated, thereby reducing the temperature difference between the filter screen assembly 322 and the extruder body 2 when extruding molten plastic after the filter screen assembly 322 is replaced.

[0025] It should be noted that, since the mounting bracket 321 also has a magnetic groove 326 inside, and the filter assembly 322 has a magnetic ring 35 fixedly installed on its surface, and the magnetic ring 35 is magnetically connected to the magnetic groove 326, it is easier and more convenient to install and remove the filter assembly 322 from inside the mounting bracket 321.

[0026] The working principle of this utility model is as follows: After the filter screen assembly 322 to be replaced is installed inside the mounting frame 321 under the action of the magnetic ring 35 and the magnetic groove 326, the heating rings installed inside the first heating ring mounting groove 324 and the second heating ring mounting groove 325 are activated to heat the filter screen assembly 322 to be replaced. When the temperature is reached, the hydraulic cylinder 323 is activated to push the mounting frame 321 to rotate on the surface of the support column 34, thereby causing the mounting frame 321 to drive the two sets of filter screen assemblies 322 to move in a fan shape, thereby realizing the automatic screen replacement operation of the two filter screen assemblies 322.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A screen changing device for a plastic sheet extruder, characterized in that, include: A frame (1) is provided, and an extruder body (2) is fixedly mounted on the top of the frame (1). One end of the extruder body (2) is fixedly installed with an extrusion die (4) via a screen changing mechanism (3); The screen changing mechanism (3) includes a mounting flange (31) fixedly installed at one end of the extruder body (2). A fixed seat (33) is fixedly installed on one side of the mounting flange (31) via a support column (34). A switching component (32) is rotatably installed between the mounting flange (31) and the fixed seat (33). The switching component (32) is used to drive the filter screen assembly (322) to move in a fan shape.

2. The screen changing device for a plastic sheet extruder according to claim 1, characterized in that: The support columns (34) are provided in three sets and arranged in a triangular pattern. The switching component (32) is rotatably installed with one of the support columns (34).

3. The screen changing device for a plastic sheet extruder according to claim 1, characterized in that: The switching assembly (32) includes a hydraulic cylinder (323) fixedly mounted on one side of the frame (1). The top of the hydraulic cylinder (323) is hinged to the mounting frame (321). The hydraulic cylinder (323) is used to push the mounting frame (321) to rotate on the surface of the support column (34).

4. The screen changing device for a plastic sheet extruder according to claim 3, characterized in that: The mounting bracket (321) has two sets of through slots inside, and both sets of through slots are T-shaped.

5. A screen changing device for a plastic sheet extruder according to claim 4, characterized in that: The mounting bracket (321) is correspondingly provided with the filter assembly (322), and the filter assembly (322) is inserted into the mounting bracket (321) through a through groove.

6. A screen changing device for a plastic sheet extruder according to claim 5, characterized in that: The mounting bracket (321) has a first heating ring mounting groove (324) and a second heating ring mounting groove (325) in its through groove, and a magnetic suction groove (326) is also provided inside the mounting bracket (321).

7. A screen changing device for a plastic sheet extruder according to claim 5, characterized in that: A magnetic ring (35) is fixedly installed on the surface of the filter assembly (322), and the magnetic ring (35) is magnetically connected to the magnetic groove (326).

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