High-speed extrusion molding mechanism for polypropylene plastic for automobile
By installing cooling components and condensation devices outside the extrusion section of the extruder, the problem of poor formability of polypropylene plastics was solved, achieving efficient temperature regulation and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUIJING NEW MATERIAL CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-15
AI Technical Summary
The existing polypropylene plastic has poor temperature control in the extruder, resulting in poor moldability. In addition, the existing cooling structure is inefficient and costly.
A cooling assembly, including heat dissipation pipes and fins, is installed outside the extrusion section of the extruder. Combined with a condenser and a water pump, it enables rapid temperature regulation and heat dissipation, and cooling is achieved through circulation in a cooling water tank.
It achieves efficient and precise temperature control, improves the quality of plastic molding, and reduces production costs.
Smart Images
Figure CN224240317U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of extrusion molding mechanism, and relates to a high-speed extrusion molding mechanism for polypropylene plastic used in automobiles. Background Technology
[0002] Polypropylene (PP) is a colorless, translucent, lightweight, general-purpose thermoplastic. It is a white, waxy material, transparent and lightweight, with a density of approximately 0.89-0.91 g / cm³. 3 Polypropylene (PP) is the lightest of commonly used plastics, but it is flammable and has a melting point between 164-170℃. It possesses chemical resistance, heat resistance, and electrical insulation properties. PP boasts high mechanical strength and good abrasion resistance, with higher tensile and impact strength than polyethylene (PE). It also exhibits high strength and rigidity, along with good toughness and impact resistance. It is primarily used in the manufacture of automotive interior parts (such as dashboards and door panels), body parts, and fuel tanks, thanks to its lightweight, heat resistance, fatigue resistance, and corrosion resistance.
[0003] Currently, polypropylene plastics require extrusion molding during the initial processing. However, existing plastics are difficult to extrude and become hard when the internal temperature of the extrusion section is low, while the plastic becomes too soft when the internal temperature of the extrusion section is too high, resulting in poor moldability and poor quality of the extruded plastic product. Therefore, a cooling device needs to be installed on the plastic extruder to maintain a moderate temperature during plastic production. For example, the patent announcement number CN220031129U, "A Circulating Water Cooling Mechanism for a Plastic Extrusion Molding Machine," simply uses a cylindrical water-cooling container fitted around the extrusion plate in the extruder and circulates water in the container to achieve a cooling effect. However, this cooling structure is not only inefficient but also has limited temperature regulation. Furthermore, because the cooling water requires time to dissipate heat, the manufacturing cost is high, requiring a large water tank, thus reducing its practicality. Utility Model Content
[0004] The purpose of this utility model is to address the above-mentioned problems by providing a high-speed extrusion molding mechanism for polypropylene plastic used in automobiles. The mechanism includes an extruder body with a cooling water tank at its front end. The extruder body is divided into a drive unit, a feeding section, a homogenizing section, and an extrusion section. The bottom of the feeding section is connected to the top of the drive unit. The front end of the drive unit is connected to the homogenizing section. The other end of the homogenizing section is connected to the extrusion section. A heating module is fitted around the homogenizing section. A cooling assembly is fitted around the extrusion section. One end of the cooling assembly is connected to a supply device, and the other end is placed above the cooling water tank. Several guide wheels are fixedly installed on the end face of the cooling water tank.
[0005] In the aforementioned high-speed extrusion molding mechanism for automotive polypropylene plastic, the cooling assembly consists of a connecting pipe, control valves, a drain pipe, a heat dissipation pipe, and heat sinks. One end of the connecting pipe is connected to the supply equipment, and the other end is connected to several control valves.
[0006] In the aforementioned high-speed extrusion molding mechanism for automotive polypropylene plastic, several control valves are respectively connected to heat dissipation pipes at their other ends, and the other ends of the heat dissipation pipes are all connected to drain pipes, with one end of the drain pipe placed above the cooling water tank.
[0007] In the above-mentioned high-speed extrusion molding mechanism for automotive polypropylene plastic, the heat dissipation pipe is a semi-circular heat-conducting hollow metal pipe, wherein the inner wall plane of the heat dissipation pipe is attached to the outer wall of the extrusion section, and a heat dissipation fin is attached to the outer wall of the top end of the heat dissipation pipe.
[0008] In the above-mentioned high-speed extrusion molding mechanism for automotive polypropylene plastic, a semi-circular fixing ring is fixedly connected to the bottom of the heat sink, and a corresponding mounting hole is provided on the outer wall of the extrusion section. The inner wall of the fixing ring is fitted to the end face of the heat sink tube, and both ends are fixedly connected to the mounting hole by screws.
[0009] In the above-mentioned high-speed extrusion molding mechanism for polypropylene plastic for automobiles, the supply equipment consists of an inlet pipe, an outlet pipe, a water tank, a condensation device, and a water pump, wherein the water tank is fixedly installed at the bottom of the cooling water tank.
[0010] In the aforementioned high-speed extrusion molding mechanism for automotive polypropylene plastic, one end of the water inlet pipe is connected to the bottom of the cooling water tank, and the other end is connected to the water tank. A condensation device is fixedly installed inside the water tank.
[0011] In the above-mentioned high-speed extrusion molding mechanism for polypropylene plastic for automobiles, a water pump is fixedly installed at the top of the water tank. The water inlet of the water pump is placed inside the water tank, and the water outlet is connected to a water outlet pipe. The other end of the water outlet pipe is connected to several connecting pipes.
[0012] In the above-mentioned high-speed extrusion molding mechanism for automotive polypropylene plastic, a temperature gauge is fixedly installed at the top of the extrusion section, and the temperature gauge is correspondingly installed between the heat dissipation pipes.
[0013] In the above-mentioned high-speed extrusion molding mechanism for automotive polypropylene plastic, the extrusion section is a square metal tube structure, wherein a screw mounting groove is provided inside the extrusion section, and the cooling component is square and attached to the outer wall of the extrusion section.
[0014] Compared with existing technologies, the advantages of this utility model are:
[0015] This invention features a cooling water tank placed at the discharge end of an extruder, facilitating the cooling and shaping of freshly processed plastic products. A water tank is connected to the bottom of the cooling water tank via an inlet pipe, and a condenser is fixedly installed inside the water tank. This allows for rapid cooling of the cooling water within the tank. A water pump is fixedly installed at the top of the water tank, with its inlet located inside the tank. The outlet of the water pump is connected to several control valves via an outlet pipe. The other ends of the control valves are respectively... The extrusion unit has several heat dissipation pipes connected in a continuous manner. These pipes are semi-circular hollow tubes with their inner walls fitted to the outer wall of the extrusion section of the extruder body. Heat dissipation fins are fixedly installed on the top outer wall of the heat dissipation pipes, allowing for faster heat dissipation. A thermometer is also fixedly installed on the extrusion section, enabling continuous monitoring of the internal temperature. The unit also allows for rapid cooling of the cooling water using a condenser, and the used cooling water is returned to the cooling water tank, further reducing operating costs and increasing efficiency.
[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0018] Figure 2 This is a schematic diagram showing the connection of the control valve, water outlet pipe, and heat dissipation pipe of this utility model.
[0019] Figure 3 This is a schematic diagram showing the connection between the cooling component and the extrusion section of this utility model.
[0020] Figure 4 This is a three-dimensional view of the heat dissipation pipe of this utility model.
[0021] Figure 5 This is a three-dimensional view of the heat sink of this utility model.
[0022] Figure 6 This is a front view of the water tank of this utility model.
[0023] Figure 7 This is a partial schematic diagram of the extrusion section of this utility model.
[0024] In the diagram: 1. Extruder body; 2. Cooling water tank; 21. Guide wheel; 3. Drive unit; 4. Feeding section; 5. Homogenization section; 6. Extrusion section; 61. Mounting hole; 62. Thermometer; 63. Mounting slot; 7. Heating module; 8. Cooling assembly; 81. Connecting pipe; 82. Control valve; 83. Drain pipe; 84. Heat dissipation pipe; 85. Heat sink; 86. Fixing ring; 9. Supply equipment; 91. Water inlet pipe; 92. Water outlet pipe; 93. Water tank; 94. Condensation device; 95. Water pump. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings.
[0026] like Figure 1-7 As shown, a high-speed extrusion molding mechanism for automotive polypropylene plastic includes an extruder body 1. A cooling water tank 2 is placed at the front end of the extruder body 1. The extruder body 1 is divided into a drive device 3, a feeding section 4, a homogenizing section 5, and an extrusion section 6. The bottom of the feeding section 4 is connected to the top of the drive device 3. The front end of the drive device 3 is connected to the homogenizing section 5. The other end of the homogenizing section 5 is connected to the extrusion section 6. A heating module 7 is fitted outside the homogenizing section 5. A cooling component 8 is fitted outside the extrusion section 6. One end of the cooling component 8 is connected to a supply device 9. The other end of the cooling component 8 is placed above the cooling water tank 2. Several guide wheels 21 are fixedly installed on the end face of the cooling water tank 2.
[0027] In this embodiment, a feeding section 4 is connected above the drive device 3 to facilitate the feeding of plastic raw materials. At the same time, a homogenization section 5 and an extrusion section 6 are connected to the front end of the drive device 3 to achieve the fusion and extrusion processing of plastic raw materials. A heating module 7 is fitted outside the homogenization section 5 to facilitate heating inside the homogenization section 5, thereby achieving rapid melting of the plastic. Meanwhile, a cooling component 8 is fitted outside the extrusion section 6 and is connected to the supply device 9. This not only allows the cooling component 8 to regulate the internal stability of the extrusion section 6, but also makes the operation more convenient and precise, further improving the processing quality of the product.
[0028] Combination Figure 2 , Figure 3 As shown, the cooling assembly 8 consists of a connecting pipe 81, a control valve 82, a drain pipe 83, a heat dissipation pipe 84, and a heat sink 85. One end of the connecting pipe 81 is connected to the supply device 9, and the other end is connected to several control valves 82.
[0029] In this embodiment, by connecting one end of the connecting pipe 81 to the supply device 9 and the other end to the control valve 82, it is convenient to transport and use cooling water.
[0030] Combination Figure 1 , Figure 2 and Figure 3 As shown, the other ends of several control valves 82 are respectively connected to heat dissipation pipes 84, and the other ends of the heat dissipation pipes 84 are all connected to drain pipes 83, with one end of the drain pipe 83 placed above the cooling water tank 2.
[0031] In this embodiment, by connecting the other end of the control valve 82 through the heat sink 84, it is convenient to control the opening and closing of the heat sink 84. At the same time, by connecting the other end of the heat sink 84 through the drain pipe 83, the cooled water can be transported back to the cooling water tank 2.
[0032] Combination Figure 3 , Figure 4 As shown, the heat dissipation pipe 84 is a semi-circular heat-conducting hollow metal pipe, wherein the inner wall plane of the heat dissipation pipe 84 is attached to the outer wall of the extrusion section 6, and a heat dissipation fin 85 is attached to the outer wall of the top end of the heat dissipation pipe 84.
[0033] In this embodiment, by setting the heat dissipation pipe 84 as a semi-circular heat-conducting hollow metal pipe, the inner wall plane of the heat dissipation pipe 84 is attached to the outer wall of the extrusion section 6, and a heat dissipation fin 85 is attached to the outer wall of the top of the heat dissipation pipe 84, so as to better remove the internal heat of the extrusion section 6.
[0034] Combination Figure 1 , Figure 5 As shown, a semi-circular fixing ring 86 is fixedly connected to the bottom of the heat sink 85, and a corresponding mounting hole 61 is provided on the outer wall of the extrusion section 6. The inner wall of the fixing ring 86 is attached to the end face of the heat sink 84, and both ends are fixedly connected to the mounting hole 61 by screws.
[0035] In this embodiment, by fixing a retaining ring 86 to the bottom of the heat sink 85 and installing the retaining ring 86 in the mounting hole 61 on the outer wall of the extrusion section 6 with screws, the heat sink 85 can be stably connected to the outside of the heat dissipation pipe 84.
[0036] Combination Figure 1 As shown, the supply device 9 consists of an inlet pipe 91, an outlet pipe 92, a water tank 93, a condensation device 94, and a water pump 95, wherein the water tank 93 is fixedly installed at the bottom of the cooling water tank 2.
[0037] In this embodiment, the water tank 93 is fixedly installed at the bottom of the cooling water tank 2 to facilitate stable support of the water tank 93.
[0038] Combination Figure 1 , Figure 6 As shown, one end of the water inlet pipe 91 is connected to the bottom of the cooling water tank 2, and the other end is connected to the water tank 93. A condenser 94 is fixedly installed inside the water tank 93.
[0039] In this embodiment, by connecting one end of the water inlet pipe 91 to the bottom of the cooling water tank 2 and the other end to the water tank 93, the cooling water inside the cooling water tank 2 can be transported to the water tank 93. A condensing device 94 is fixedly installed inside the water tank 93, which facilitates the stable regulation and use of the cooling water.
[0040] Combination Figure 1 , Figure 6 As shown, a water pump 95 is fixedly installed on the top of the water tank 93. The water inlet of the water pump 95 is placed inside the water tank 93, and the outlet is connected to an outlet pipe 92. The other end of the outlet pipe 92 is connected to several connecting pipes 81.
[0041] In this embodiment, a water pump 95 is fixedly installed at the top of the water tank 93, and the outlet end of the water pump 95 is connected to the connecting pipe 81 through the outlet pipe 92, so that the connecting pipe 81 can be transported with cooling water.
[0042] Combination Figure 1 , Figure 7 As shown, a temperature gauge 62 is fixedly installed at the top of the extrusion section 6, and the temperature gauge 62 is correspondingly installed between the heat dissipation pipes 84.
[0043] In this embodiment, a temperature gauge 62 is fixedly installed at the top of the extrusion section 6, so that the internal temperature of the extrusion section 6 can be observed at any time, which helps to maintain the processing quality of the product.
[0044] Combination Figure 1 , Figure 7 As shown, the extrusion section 6 is a square metal tube structure, in which a screw mounting groove 63 is provided inside the extrusion section 6, and the cooling component 8 is square and attached to the outer wall of the extrusion section 6.
[0045] In this embodiment, by attaching the cooling component 8 to the outer wall of the extrusion section 6, it is easier to remove the heat from the extrusion section 6 and to facilitate temperature adjustment at different locations.
[0046] The working principle of this utility model is as follows:
[0047] In use, this invention features a water tank 93 placed at the bottom of the cooling water tank 2, with the water tank 93 connected to the interior of the cooling water tank 2 via an inlet pipe 91. This facilitates the delivery of cooling water from the cooling water tank 2 to the water tank 93. A condenser 94 is fixedly installed inside the water tank 93 to regulate the temperature of the cooling water. A water pump 95 is fixedly installed at the top of the water tank 93 to further deliver the cooling water to the heat dissipation pipes 84, which are controlled by valves 82. Heat dissipation fins 85 are screwed to the outer wall of the heat dissipation pipes 84, allowing the heat to be dissipated by airflow. A thermometer 62 is fixedly installed at the top of the extrusion section 6 to monitor the internal temperature and adjust the heat dissipation range as needed. This design offers improved efficiency and ease of operation.
[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.
[0049] Although this document frequently uses terms such as 1. extruder body; 2. cooling water tank; 21. guide wheel; 3. drive device; 4. feeding section; 5. homogenization section; 6. extrusion section; 61. mounting hole; 62. thermometer; 63. mounting groove; 7. heating module; 8. cooling assembly; 81. connecting pipe; 82. control valve; 83. drain pipe; 84. heat dissipation pipe; 85. heat dissipation fin; 86. retaining ring; 9. supply equipment; 91. water inlet pipe; 92. water outlet pipe; 93. water tank; 94. condensation device; 95. water pump, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.
Claims
1. A high-speed extrusion molding mechanism for automotive polypropylene plastic, comprising an extruder body (1), characterized in that, The extruder body (1) has a cooling water tank (2) at its front end. The extruder body (1) is divided into a drive unit (3), a feeding section (4), a homogenization section (5), and an extrusion section (6). The bottom of the feeding section (4) is connected to the top of the drive unit (3). The front end of the drive unit (3) is connected to the homogenization section (5). The other end of the homogenization section (5) is connected to the extrusion section (6). A heating module (7) is fitted outside the homogenization section (5). A cooling component (8) is fitted outside the extrusion section (6). One end of the cooling component (8) is connected to the supply device (9). The other end of the cooling component (8) is placed above the cooling water tank (2). Several guide wheels (21) are fixedly installed on the end face of the cooling water tank (2).
2. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 1, characterized in that, The cooling assembly (8) consists of a connecting pipe (81), a control valve (82), a drain pipe (83), a heat dissipation pipe (84), and a heat sink (85). One end of the connecting pipe (81) is connected to the supply device (9), and the other end is connected to several control valves (82).
3. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 2, characterized in that, Several of the control valves (82) are connected to a heat dissipation pipe (84) at one end, and the other end of each heat dissipation pipe (84) is connected to a drain pipe (83), and one end of the drain pipe (83) is placed above the cooling water tank (2).
4. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 3, characterized in that, The heat dissipation pipe (84) is a semi-circular heat-conducting hollow metal pipe, wherein the inner wall plane of the heat dissipation pipe (84) is attached to the outer wall of the extrusion section (6), and a heat dissipation fin (85) is attached to the outer wall of the top end of the heat dissipation pipe (84).
5. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 4, characterized in that, The bottom of the heat sink (85) is fixedly connected to a semi-circular fixing ring (86), and a corresponding mounting hole (61) is provided on the outer wall of the extrusion section (6). The inner wall of the fixing ring (86) is attached to the end face of the heat sink (84), and both ends are fixedly connected to the mounting hole (61) by screws.
6. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 5, characterized in that, The supply device (9) consists of an inlet pipe (91), an outlet pipe (92), a water tank (93), a condensation device (94), and a water pump (95), wherein the water tank (93) is fixedly installed at the bottom of the cooling water tank (2).
7. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 6, characterized in that, One end of the water inlet pipe (91) is connected to the bottom of the cooling water tank (2), and the other end is connected to the water tank (93). A condensing device (94) is fixedly installed inside the water tank (93).
8. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 7, characterized in that, A water pump (95) is fixedly installed on the top of the water tank (93). The water inlet of the water pump (95) is placed inside the water tank (93), and the outlet is connected to an outlet pipe (92). The other end of the outlet pipe (92) is connected to several connecting pipes (81).
9. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 8, characterized in that, A temperature gauge (62) is fixedly installed at the top of the extrusion section (6), and the temperature gauge (62) is correspondingly installed between the heat dissipation pipes (84).
10. The high-speed extrusion molding mechanism for automotive polypropylene plastic according to claim 9, characterized in that, The extrusion section (6) is a square metal tube structure, wherein a screw mounting groove (63) is provided inside the extrusion section (6), and the cooling component (8) is square and attached to the outer wall of the extrusion section (6).