High-temperature-resistant and acid-alkali-resistant polyurethane extrusion molding device

Abstract

The utility model provides a kind of high-temperature-resistant acid and alkali polyurethane extrusion forming device, it is related to polyurethane field.The high-temperature-resistant acid and alkali polyurethane extrusion forming device, including extruder, the output end of the extruder is fixedly connected with shaping die, the surface of the shaping die is provided with outer cooling mechanism, the outer cooling mechanism includes spraying ring and water storage tank, the middle part of the shaping die is provided with inner cooling mechanism, the inner cooling mechanism includes inner shaping pipe, spraying pipe and threaded connecting pipe.The high-temperature-resistant acid and alkali polyurethane extrusion forming device, by extruder, shaping die and shaping pipe, extrude polyurethane pipeline shape, by spraying ring, cooling water is sprayed on the surface of polyurethane pipeline, the outer surface of polyurethane pipeline is rapidly cooled, by threaded connecting pipe, spraying pipe is fixed in the front end of inner shaping pipe, by spraying pipe, low-temperature cooling water is sprayed, the inner wall of polyurethane pipeline is cooled, improve the yield of polyurethane pipeline forming.

Description

Technical Field

[0001] This utility model relates to a polyurethane extrusion molding device, specifically a high-temperature resistant and acid / alkali resistant polyurethane extrusion molding device, belonging to the field of polyurethane technology. Background Technology

[0002] Polyurethane (PU), short for polyurethane, is a high-molecular-weight material with excellent mechanical properties, formed by the condensation reaction of polyols and polyisocyanates. It is highly malleable and exhibits better stability, chemical resistance, resilience, and mechanical properties, with less compression deformation. It also provides good thermal insulation, sound insulation, shock resistance, and toxicity protection.

[0003] The utility model patent CN213947365U relates to the field of extrusion molding equipment technology, specifically a polyurethane synchronous belt extrusion molding equipment, including an extruder body, with a mounting part fixedly sleeved on the outer side of the extrusion port of the extruder body. This utility model features multiple interchangeable extrusion heads mounted on the outer wall of the mounting part, with adjacent extrusion heads connected by heat insulation pads. Therefore, the extrusion heads can be replaced periodically during use, preventing overheating.

[0004] In the processing of polyurethane pipes, an extruder is used to extrude and mold the polyurethane. Although the molding equipment in the aforementioned patent is convenient for periodic replacement of the extrusion head, it requires a high melting temperature when producing high-temperature and acid-alkali resistant polyurethane pipes. Most existing shaping methods use cooling water to cool the pipe surface. Because polyurethane pipes have good thermal insulation properties, the cooling and shaping effect of the inner ring of the pipe is poor. Prolonged high temperature can easily cause the polyurethane pipe to collapse and deform, reducing the molding effect of the polyurethane pipe. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a high-temperature and acid-alkali resistant polyurethane extrusion molding device to solve the above-mentioned problems, thereby addressing the issue of poor shaping effect of the inner wall of polyurethane pipes in the prior art.

[0007] (II) Technical Solution

[0008] This utility model is achieved through the following technical solution: a high-temperature resistant and acid-alkali resistant polyurethane extrusion molding device.

[0009] The extruder is included, and a shaping mold is fixedly connected to the output end of the extruder. An external cooling mechanism is provided on the surface of the shaping mold. The external cooling mechanism includes a spray ring and a water tank, and the spray ring is fixed to the surface of the shaping mold. An internal cooling mechanism is provided in the middle of the shaping mold. The internal cooling mechanism includes an internal shaping tube, a spray tube and a threaded connecting tube, and the internal shaping tube is fixedly connected to the shaping mold.

[0010] Preferably, the surface of the spray ring is fixedly connected to a circumferentially arranged spray head, and the bottom of the spray ring is fixedly connected to a cooling water pipe, and the bottom of the cooling water pipe is fixedly connected to a water storage tank. Through the cooling water pipe, low-temperature cooling water inside the water storage tank is drawn and continuously delivered to the spray ring.

[0011] Preferably, a baffle plate is fixedly connected to the surface of the water storage tank, and equidistant return ports are opened on the surface of the water storage tank. A chiller is fixedly installed at the bottom of the water storage tank. The baffle plate collects the cooling water dripping from the surface of the water storage tank, preventing the cooling water from flowing everywhere.

[0012] Preferably, the threaded connecting pipe is threadedly connected to the inner shaping pipe, and a sealing ring is fixedly connected to the surface of the inner shaping pipe, and the sealing ring abuts against the surface of the threaded connecting pipe. The sealing ring seals and limits the connection between the threaded connecting pipe and the inner shaping pipe, preventing the threaded connecting pipe from loosening due to the movement of the polyurethane pipe.

[0013] Preferably, a connecting pipe is fixedly connected to the middle of the threaded connecting pipe, and the other end of the connecting pipe is fixedly connected to the spray pipe. The connecting pipe is hexagonal prism in shape. The threaded connecting pipe and the spray pipe are fixedly connected through the connecting pipe. The hexagonal prism shape facilitates the disassembly and installation of the threaded connecting pipe, thereby improving the convenience of using the device.

[0014] Preferably, the surface of the spray pipe is fixedly connected with equidistantly arranged atomizing heads, and the atomizing heads are arranged in a spiral on the surface of the spray pipe. The cooling water is atomized through the atomizing heads, and the spiral arrangement reduces the dead angle of the cooling water spray, so that the sprayed water mist contacts the inner wall of the polyurethane pipe in all directions, thereby improving the shaping effect of the polyurethane pipe.

[0015] Preferably, the inner shaping tube is internally connected to a heat insulation sleeve, one end of which is fixedly connected to a connecting pipe, and the other end of which is fixedly connected to a spray ring. The heat insulation sleeve keeps the cooling water cold and heat-insulated, preventing the low temperature of the cooling water from causing the polyurethane to cool and solidify inside the shaping mold, thereby improving the stability of the polyurethane molding inside the shaping mold.

[0016] Preferably, the middle part of the threaded connecting pipe is slidably connected to the heat insulation sleeve, and a second sealing ring is fixedly connected inside the heat insulation sleeve, and the second sealing ring abuts against the heat insulation sleeve. The second sealing ring fills the gap between the threaded connecting pipe and the heat insulation sleeve, so as to prevent the threaded connecting pipe from being damaged by excessive thermal expansion and squeezing of the heat insulation sleeve.

[0017] This utility model provides a high-temperature and acid / alkali resistant polyurethane extrusion molding device, which has the following beneficial effects:

[0018] 1. This high-temperature and acid / alkali resistant polyurethane extrusion molding device uses an extruder and a shaping die to extrude polyurethane pipes. Cooling water is stored in a water tank and sprayed onto the surface of the polyurethane pipes via a spray ring, rapidly cooling the outer surface and improving the stability of the pipe molding process. An inner shaping tube extrudes the inner ring of the polyurethane pipe. A threaded connecting pipe fixes the spray pipe to the front end of the inner shaping tube, spraying low-temperature cooling water to cool the inner wall of the polyurethane pipe, improving molding efficiency and preventing poor pipe molding results due to excessively high extrusion temperatures, thus increasing the yield of high-quality polyurethane pipes.

[0019] 2. This high-temperature and acid / alkali resistant polyurethane extrusion molding device draws low-temperature cooling water from the storage tank through a cooling water pipe and continuously supplies the cooling water to the spray ring. A baffle plate collects the cooling water dripping from the surface of the storage tank, preventing it from flowing everywhere. A return port allows the collected cooling water to flow back into the storage tank, improving water resource recycling efficiency. A chiller cools the cooling water inside the storage tank, enhancing the shaping effect of the cooling water on the polyurethane pipes. A sealing ring seals and limits the connection between the threaded pipe and the inner shaping pipe, preventing movement of the polyurethane pipes and loosening of the threaded pipes, thus improving the stability of the threaded pipe connection. A connecting pipe securely connects the threaded pipe to the spray pipe, and its hexagonal prism shape facilitates disassembly and installation of the threaded pipe, improving the ease of use of the device.

[0020] 3. This high-temperature and acid / alkali-resistant polyurethane extrusion molding device atomizes cooling water through an atomizing head. The spiral arrangement of the atomizing head reduces dead zones in the cooling water spray, ensuring the water mist contacts the inner wall of the polyurethane pipe from all angles. This improves the shaping effect of the polyurethane pipe. The atomized cooling water also more easily absorbs heat from the inner wall of the polyurethane pipe and vaporizes, further enhancing the cooling effect. The vaporized water provides comprehensive support to the polyurethane pipe, reducing deformation and improving the molding effect. The heat insulation sleeve keeps the cooling water cool and prevents the polyurethane from cooling and solidifying inside the molding die due to low temperatures, improving the stability of the polyurethane molding process. A second sealing ring fills the gap between the threaded connecting pipe and the heat insulation sleeve, preventing the threaded connecting pipe from expanding due to heat and excessively compressing the heat insulation sleeve, thus improving the stability and safety of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the molding die of this utility model;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the internal cooling mechanism of this utility model;

[0024] Figure 4 This is a cross-sectional view of the internal cooling mechanism of this utility model.

[0025] [Explanation of Key Component Symbols]

[0026] 1. Extruder; 2. Shaping die;

[0027] 3. External cooling mechanism; 301. Spray ring; 302. Cooling water pipe; 303. Water tank; 304. Spray head; 305. Return port; 306. Refrigeration unit; 307. Water baffle;

[0028] 4. Internal cooling mechanism; 401. Inner shaping tube; 402. Connecting tube; 403. Spraying tube; 404. Atomizing head; 405. Connecting tube; 406. Threaded connecting tube; 407. Sealing ring one; 408. Heat insulation sleeve; 409. Sealing ring two. Detailed Implementation

[0029] This utility model provides a high-temperature resistant and acid / alkali resistant polyurethane extrusion molding device.

[0030] Example 1:

[0031] Please see Figure 1 and Figure 2The extruder 1 is included, and a shaping mold 2 is fixedly connected to the output end of the extruder 1. An external cooling mechanism 3 is provided on the surface of the shaping mold 2. The external cooling mechanism 3 includes a spray ring 301 and a water storage tank 303. The spray ring 301 is fixed on the surface of the shaping mold 2. The extruder 1 and the shaping mold 2 are used to extrude polyurethane pipes. The water storage tank 303 stores cooling water. The spray ring 301 sprays cooling water onto the surface of the polyurethane pipes to rapidly cool the outer surface of the polyurethane pipes and improve the stability of the polyurethane pipe molding.

[0032] The surface of the spray ring 301 is fixedly connected to a circumferentially arranged spray head 304, and the bottom of the spray ring 301 is fixedly connected to a cooling water pipe 302. The bottom of the cooling water pipe 302 is fixedly connected to a water storage tank 303. A water pump is installed in the middle of the cooling water pipe 302 and is installed inside the water storage tank 303. The water pump is prior art and will not be described in detail in this application. The cooling water pipe 302 draws low-temperature cooling water from inside the water storage tank 303 and continuously delivers the cooling water to the spray ring 301. The spray head 304 sprays the cooling water inside the spray ring 301 evenly and at an angle onto the outer surface of the polyurethane pipe, thereby improving the cooling and molding efficiency of the polyurethane pipe.

[0033] A baffle plate 307 is fixedly connected to the surface of the water storage tank 303. The surface of the water storage tank 303 is provided with equidistant return ports 305. A chiller 306 is fixedly installed at the bottom of the water storage tank 303. The baffle plate 307 collects the cooling water dripping from the surface of the water storage tank 303 to prevent the cooling water from flowing everywhere. The return ports 305 allow the cooling water collected on the surface of the water storage tank 303 to flow back into the interior of the water storage tank 303, improving the efficiency of water resource recycling. The chiller 306 cools the cooling water inside the water storage tank 303, improving the cooling water's shaping effect on the polyurethane pipes.

[0034] Example 2:

[0035] Please see Figure 2 , Figure 3 and Figure 4 An internal cooling mechanism 4 is provided in the middle of the forming mold 2. The internal cooling mechanism 4 includes an inner forming tube 401, a spraying tube 403, and a threaded connecting tube 406. The inner forming tube 401 is fixedly connected to the forming mold 2. The inner ring of the polyurethane pipe is extruded and formed through the inner forming tube 401. The spraying tube 403 is fixed to the front end of the inner forming tube 401 through the threaded connecting tube 406. Low-temperature cooling water is sprayed through the spraying tube 403 to cool the inner wall of the polyurethane pipe, improve the forming efficiency of the polyurethane pipe, avoid poor pipe forming effect due to excessive temperature during polyurethane pipe extrusion, and improve the yield of polyurethane pipe forming.

[0036] The threaded connecting pipe 406 is threadedly connected to the inner shaping pipe 401. A sealing ring 407 is fixedly connected to the surface of the inner shaping pipe 401, and the sealing ring 407 abuts against the surface of the threaded connecting pipe 406. The sealing ring 407 is made of high temperature resistant material and can be used in high temperature environment for a long time. The sealing ring 407 seals and limits the connection between the threaded connecting pipe 406 and the inner shaping pipe 401, preventing the polyurethane pipe from moving and causing the threaded connecting pipe 406 to loosen, thus improving the stability of the connection of the threaded connecting pipe 406.

[0037] The threaded connecting pipe 406 is fixedly connected to the middle of the connecting pipe 405. The other end of the connecting pipe 405 is fixedly connected to the spray pipe 403. The connecting pipe 405 is hexagonal prism in shape. The threaded connecting pipe 406 and the spray pipe 403 are fixedly connected through the connecting pipe 405. The hexagonal prism shape makes it easy to disassemble and install the threaded connecting pipe 406, improving the convenience of using the device.

[0038] Example 3:

[0039] Please see Figure 3 and Figure 4 The surface of the spray pipe 403 is fixedly connected with equidistantly arranged atomizing heads 404, which are spirally arranged on the surface of the spray pipe 403. The cooling water is atomized through the atomizing heads 404, and the spiral arrangement reduces the dead angle of the cooling water spray, so that the sprayed water mist comes into contact with the inner wall of the polyurethane pipe in all directions, improving the shaping effect of the polyurethane pipe. In addition, the water mist cooling water can more easily absorb the heat of the inner wall of the polyurethane pipe and vaporize, improving the cooling effect of the polyurethane pipe. Furthermore, the water vaporization provides all-round support to the polyurethane pipe, reducing the deformation of the polyurethane pipe and improving the forming effect of the polyurethane pipe.

[0040] The inner shaping tube 401 is internally connected to a heat insulation sleeve 408. One end of the heat insulation sleeve 408 is fixedly connected to a connecting pipe 402, and the other end of the connecting pipe 402 is fixedly connected to the spray ring 301. The heat insulation sleeve 408 is used to keep the cooling water cold and heat-insulated, so as to prevent the polyurethane from cooling and solidifying inside the shaping mold 2 due to the low temperature of the cooling water, thereby improving the stability of the polyurethane molding inside the shaping mold 2. The cooling water inside the spray ring 301 is transported to the inside of the heat insulation sleeve 408 through the connecting pipe 402.

[0041] The threaded connecting pipe 406 is slidably connected to the heat insulation sleeve 408 in the middle. A sealing ring 409 is fixedly connected inside the heat insulation sleeve 408, and the sealing ring 409 abuts against the heat insulation sleeve 408. The sealing ring 409 fills the gap between the threaded connecting pipe 406 and the heat insulation sleeve 408, preventing the threaded connecting pipe 406 from expanding due to heat and excessively squeezing the heat insulation sleeve 408, which would damage the heat insulation sleeve 408. This improves the stability and safety of the device.

[0042] In use, this invention works as follows: A polyurethane pipe shape is extruded using an extruder 1, a shaping mold 2, and an inner shaping tube 401. Low-temperature cooling water is drawn from the water storage tank 303 via a cooling water pipe 302 and continuously supplied to the spray ring 301. The cooling water is then evenly sprayed onto the outer surface of the polyurethane pipe through a spray head 304, improving the efficiency of cooling and shaping the polyurethane pipe. Cooling water dripping from the surface of the polyurethane pipe is collected by a baffle plate 307 and a return port 305. The cooling water from the spray ring 301 is then transported to the insulation sleeve 408 via a connecting pipe 402. The cooling water then passes through a threaded connecting pipe 406 and a connecting... Pipe 405 and spray pipe 403 deliver cooling water to atomizing head 404. Through atomizing head 404, cooling water is atomized, and the spiral arrangement reduces the dead angle of cooling water spray, allowing the sprayed water mist to contact the inner wall of the polyurethane pipe in all directions, improving the shaping effect of the polyurethane pipe. In addition, the water mist cooling water can more easily absorb the heat of the inner wall of the polyurethane pipe and vaporize, improving the cooling effect of the polyurethane pipe. The water vaporization also provides all-round support for the polyurethane pipe, reducing the deformation of the polyurethane pipe and improving the molding effect of the polyurethane pipe. With the above device, the high temperature and acid and alkali resistant polyurethane pipe can be cooled and molded inside and out at the same time, improving the stability of the molding of the high temperature and acid and alkali resistant polyurethane pipe.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and acid / alkali resistant polyurethane extrusion molding apparatus, comprising an extruder (1), characterized in that: The output end of the extruder (1) is fixedly connected to a shaping mold (2). An external cooling mechanism (3) is provided on the surface of the shaping mold (2). The external cooling mechanism (3) includes a spray ring (301) and a water tank (303). The spray ring (301) is fixed on the surface of the shaping mold (2). An internal cooling mechanism (4) is provided in the middle of the shaping mold (2). The internal cooling mechanism (4) includes an inner shaping tube (401), a spray tube (403), and a threaded connecting tube (406). The inner shaping tube (401) is fixedly connected to the shaping mold (2).

2. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The surface of the spray ring (301) is fixedly connected to a spray head (304) arranged in a circle, and the bottom of the spray ring (301) is fixedly connected to a cooling water pipe (302), and the bottom of the cooling water pipe (302) is fixedly connected to a water storage tank (303).

3. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: A baffle plate (307) is fixedly connected to the surface of the water storage tank (303), and equidistant return ports (305) are opened on the surface of the water storage tank (303). A chiller (306) is fixedly installed at the bottom of the water storage tank (303).

4. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The threaded connecting pipe (406) is threadedly connected to the inner shaping pipe (401). A sealing ring (407) is fixedly connected to the surface of the inner shaping pipe (401), and the sealing ring (407) and the surface of the threaded connecting pipe (406) abut against each other.

5. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The threaded connecting pipe (406) is fixedly connected to a connecting pipe (405) in the middle, and the other end of the connecting pipe (405) is fixedly connected to the spray pipe (403), and the connecting pipe (405) is hexagonal prism in shape.

6. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The surface of the spray pipe (403) is fixedly connected with atomizing heads (404) arranged at equal intervals, and the atomizing heads (404) are arranged in a spiral on the surface of the spray pipe (403).

7. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The inner shaping tube (401) is internally connected to a heat insulation sleeve (408), one end of the heat insulation sleeve (408) is fixedly connected to a connecting pipe (402), and the other end of the connecting pipe (402) is fixedly connected to a spray ring (301).

8. The high-temperature resistant and acid / alkali resistant polyurethane extrusion molding apparatus according to claim 1, characterized in that: The middle part of the threaded connecting pipe (406) is slidably connected to the heat insulation sleeve (408). The heat insulation sleeve (408) is fixedly connected to a second sealing ring (409), and the second sealing ring (409) abuts against the heat insulation sleeve (408).

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