Extrusion die for PVDF (Polyvinylidene Fluoride) pipe production

Abstract

The utility model discloses an extrusion die for PVDF (Polyvinylidene Fluoride) pipe production, and relates to the technical field of PVDF pipe production. The extrusion die for PVDF pipe production comprises an extruder, a mounting mechanism and a cooling mechanism, and a die body is arranged on one side of the extruder; the mounting mechanism is arranged on one side of the extruder and comprises an annular block, L-shaped clamping grooves and positioning blocks, one side of the extruder is fixedly connected with one side of the annular block, the other side of the annular block is provided with the two L-shaped clamping grooves, the mold body is located in the annular block, and the two positioning blocks are fixedly mounted on the outer wall of the mold body. The positioning block is attached to the inner wall of the L-shaped clamping groove but not connected with the inner wall of the L-shaped clamping groove. The cooling mechanism is arranged on one side of the extruder and comprises an air gathering box and an air outlet pipe. The mold does not need to be fixed through bolts, when pipelines of other models are produced, disassembly and assembly are easier, workers can conveniently and rapidly replace the mold, and the workload of operators is reduced.

Description

Technical Field

[0001] This utility model relates to the field of PVDF pipe production technology, and in particular to an extrusion die for PVDF pipe production. Background Technology

[0002] Chinese patent document CN217993455U discloses an extrusion die for ultrapure PVDF pipes, including an inverted cup die, a heating coil, a torpedo head, a kerf die, a die nozzle, a flange, and a mandrel. The inverted cup die, kerf die, and flange are connected sequentially from left to right to form a column, with the heating coil covering the circumferential surface. The inverted cup die has a first through hole in the shape of an inverted cup at its axial center. The kerf die includes an annular outer die and an inner die connected to the axial center of the outer die. A second through hole corresponding to the right side of the first through hole in the inverted cup die is provided between the left middle part of the kerf die, the outer die, and the inner die. The torpedo head is shaped from left to right and gradually increases in size, and is connected to the inner die. The outer shape of the mandrel corresponds to that of the inner die, and the mandrel is connected to the inner die. The die nozzle has a third through hole that runs through the left and right sides. The left part of the third through hole is a flared shape that gradually decreases in size from left to right, and the right part of the third through hole is a round hole. The flange limits and fixes the die nozzle to the kerf die. This die can prevent the raw material from decomposing and generating corrosive gases due to increased temperature.

[0003] When using the above-mentioned ultrapure PVDF pipe extrusion die, the die needs to be fixed to the extruder with multiple sets of bolts. When other types of pipes need to be produced, disassembly and installation are relatively troublesome, and it is not convenient to quickly replace the die, which increases the workload of the staff. Utility Model Content

[0004] The purpose of this utility model is to provide an extrusion die for PVDF pipe production, which can solve the problem that when the above-mentioned ultrapure PVDF pipe extrusion die is used, the die needs to be fixed on the extruder with multiple sets of bolts. When other types of pipes need to be produced, disassembly and installation are relatively troublesome, making it inconvenient to quickly replace the die and increasing the workload of the staff.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extrusion die for PVDF pipe production, comprising an extruder, an installation mechanism, and a cooling mechanism. A die body is provided on one side of the extruder; the installation mechanism is located on one side of the extruder and includes an annular block, L-shaped grooves, and positioning blocks. One side of the extruder is fixedly connected to one side of the annular block, and two sets of L-shaped grooves are provided on the other side of the annular block. The die body is located inside the annular block, and two sets of positioning blocks are fixedly installed on the outer wall of the die body. The positioning blocks are in contact with but not connected to the inner wall of the L-shaped grooves; the cooling mechanism is located on one side of the extruder and includes an air-collecting box and air-discharge pipes. An air-collecting box is fixedly installed on one side of the extruder, and multiple sets of air-discharge pipes are fixedly installed on the top of the air-collecting box. The air-collecting box and the air-discharge pipes are connected.

[0006] Preferably, the installation mechanism further includes a limiting hole, a fixing plate, a plug rod, a partition plate, and a return spring. A limiting hole is provided on one side of the annular block. A fixing plate is fixedly installed on the outer wall of the mold body. The interior of the fixing plate is slidably connected to the outer wall of the plug rod. One end of the plug rod extends into the interior of the limiting hole. The outer wall of the plug rod is fixedly connected to the interior of the partition plate. A return spring is fixedly installed on one side of the partition plate. One end of the return spring is fixedly connected to one side of the fixing plate. The plug rod passes through the interior of the return spring but is not connected to it. The mold does not need to be fixed with bolts. When producing other types of pipes, disassembly and installation are simpler, making it easier for workers to quickly change the mold and reducing the workload of operators.

[0007] Preferably, the cooling mechanism further includes an air intake fan. An air intake fan is fixedly installed on the bottom inner side of the air collection box to blow air onto the freshly extruded PVDF pipe, thereby accelerating the heat loss rate from the pipe surface, enabling the pipe to cool and solidify quickly, preventing excessive deformation of the pipe, ensuring product quality, and improving the usability and practicality of the device.

[0008] Preferably, an auxiliary lever is fixedly installed at the other end of the plug rod.

[0009] Preferably, the bottom of the air collecting box is provided with an air inlet, and the air intake fan is located above the air inlet.

[0010] Preferably, a feed pipe is provided on one side of the mold body.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) The extrusion die for producing PVDF pipes uses an annular block, L-shaped groove, limit hole, positioning block, fixing plate, plug rod, partition plate and reset spring in combination. It does not require bolts to fix the die. When producing other types of pipes, it is easier to disassemble and install, and it is convenient for workers to quickly change the die, reducing the workload of operators.

[0013] (2) The extrusion die for producing PVDF pipes uses a combination of a blower box, an air outlet pipe and an air inlet fan to blow air onto the freshly extruded PVDF pipes, which accelerates the heat loss rate on the pipe surface, allows the pipes to cool and solidify quickly, avoids excessive deformation of the pipes, ensures product quality, and improves the availability and practicality of the device. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the annular block of this utility model;

[0017] Figure 3 This is a rear three-dimensional structural diagram of the mold body of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the plug-in rod of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the wind collection box of this utility model.

[0020] Reference numerals in the attached drawings: 1. Extruder; 2. Die body; 3. Mounting mechanism; 301. Annular block; 302. L-shaped slot; 303. Limiting hole; 304. Positioning block; 305. Fixing plate; 306. Connecting rod; 307. Divider; 4. Cooling mechanism; 401. Air collection box; 402. Air outlet pipe; 403. Air intake fan; 5. Feed pipe; 6. Auxiliary lever. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: an extrusion die for PVDF pipe production, including an extruder 1, an installation mechanism 3, and a cooling mechanism 4. A die body 2 is provided on one side of the extruder 1. The installation mechanism 3 is located on one side of the extruder 1 and includes an annular block 301, L-shaped slots 302, and positioning blocks 304. One side of the extruder 1 is fixedly connected to one side of the annular block 301. Two sets of L-shaped slots 302 are provided on the other side of the annular block 301. The die body 2 is located inside the annular block 301, and two sets of positioning blocks 304 are fixedly installed on the outer wall of the die body 2. The positioning block 304 fits against but is not connected to the inner wall of the L-shaped slot 302; the cooling mechanism 4 is located on one side of the extruder 1, and the cooling mechanism 4 includes an air collecting box 401 and an air outlet pipe 402. The air collecting box 401 is fixedly installed on one side of the extruder 1, and multiple sets of air outlet pipes 402 are fixedly installed on the top of the air collecting box 401. The air collecting box 401 and the air outlet pipes 402 are connected; an auxiliary lever 6 is fixedly installed on the other end of the plug rod 306; an air inlet is opened at the bottom of the air collecting box 401, and an air intake fan 403 is located above the air inlet; a feed pipe 5 is opened on one side of the mold body 2.

[0023] Secondly, the installation mechanism 3 also includes a limiting hole 303, a fixing plate 305, a plug rod 306, a partition plate 307, and a return spring 308. A limiting hole 303 is provided on one side of the annular block 301. A fixing plate 305 is fixedly installed on the outer wall of the mold body 2. The interior of the fixing plate 305 is slidably connected to the outer wall of the plug rod 306. One end of the plug rod 306 extends into the interior of the limiting hole 303. The outer wall of the plug rod 306 is fixedly connected to the interior of the partition plate 307. A return spring 308 is fixedly installed on one side of the partition plate 307. One end of the return spring 308 is fixedly connected to one side of the fixing plate 305. The plug rod 306 passes through the interior of the return spring 308 but is not connected to it. The mold does not need to be fixed with bolts. When producing other types of pipes, disassembly and installation are simpler, making it easier for workers to quickly change the mold and reducing the workload of operators.

[0024] Furthermore, the cooling mechanism 4 also includes an air intake fan 403. The air intake fan 403 is fixedly installed on the bottom inner side of the air collection box 401 to blow air onto the freshly extruded PVDF pipe, accelerate the heat loss rate of the pipe surface, enable the pipe to cool and solidify quickly, avoid excessive deformation of the pipe, ensure product quality, and improve the availability and practicality of the device.

[0025] Working principle: When using the mold body 2, select the appropriate model and insert the mold body 2 into the annular block 301. At the same time, insert the positioning block 304 into the L-shaped slot 302. Pull the insertion rod 306 outward through the auxiliary lever 6, which will move the separator 307 and compress the return spring 308. Then rotate the mold body 2 to lock the positioning block 304 into the horizontal groove of the L-shaped slot 302. Release the auxiliary lever 6. Under the elastic action of the return spring 308, push the separator 307 back to move, so that the insertion rod 306 is inserted into the limiting hole 303 to limit the mold body 2 and prevent the mold body 2 from rotating. This completes the installation of the mold body 2. Disassembly is done by reversing the operation. The PVDF pipe is extruded through the mold body 2. Turn on the air intake fan 403 to draw cold air from the outside into the air collection box 401. The air is then blown onto the freshly extruded pipe through the air outlet pipe 402 to cool and solidify it quickly.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An extrusion die for producing PVDF pipes, characterized in that, include: An extruder (1) is provided with a mold body (2) on one side of the extruder (1); The mounting mechanism (3) is located on one side of the extruder (1). The mounting mechanism (3) includes an annular block (301), an L-shaped slot (302) and a positioning block (304). One side of the extruder (1) is fixedly connected to one side of the annular block (301). Two sets of L-shaped slots (302) are opened on the other side of the annular block (301). The mold body (2) is located inside the annular block (301). Two sets of positioning blocks (304) are fixedly installed on the outer wall of the mold body (2). The positioning blocks (304) are in contact with the inner wall of the L-shaped slots (302) but not connected. A cooling mechanism (4) is provided on one side of the extruder (1). The cooling mechanism (4) includes an air collection box (401) and an air outlet pipe (402). An air collection box (401) is fixedly installed on one side of the extruder (1). Multiple sets of air outlet pipes (402) are fixedly installed on the top of the air collection box (401). The air collection box (401) and the air outlet pipes (402) are connected to each other.

2. The extrusion die for producing PVDF pipes according to claim 1, characterized in that: The installation mechanism (3) also includes a limiting hole (303), a fixing plate (305), a plug rod (306), a partition plate (307), and a return spring (308). A limiting hole (303) is opened on one side of the annular block (301). A fixing plate (305) is fixedly installed on the outer wall of the mold body (2). The interior of the fixing plate (305) is slidably connected to the outer wall of the plug rod (306). One end of the plug rod (306) extends into the interior of the limiting hole (303). The outer wall of the plug rod (306) is fixedly connected to the interior of the partition plate (307). A return spring (308) is fixedly installed on one side of the partition plate (307). One end of the return spring (308) is fixedly connected to one side of the fixing plate (305). The plug rod (306) passes through the interior of the return spring (308) but is not connected to it.

3. The extrusion die for producing PVDF pipes according to claim 2, characterized in that: The cooling mechanism (4) also includes an intake fan (403), and the intake fan (403) is fixedly installed on the bottom inner side of the air collection box (401).

4. The extrusion die for producing PVDF pipes according to claim 3, characterized in that: An auxiliary lever (6) is fixedly installed at the other end of the plug rod (306).

5. The extrusion die for producing PVDF pipes according to claim 4, characterized in that: The bottom of the air collecting box (401) has an air inlet, and the air intake fan (403) is located above the air inlet.

6. The extrusion die for producing PVDF pipes according to claim 5, characterized in that: A feed pipe (5) is provided on one side of the mold body (2).

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