PVC管挤出设备及其冷却装置
By introducing a heat insulation component and a vacuum pump system into the PVC pipe extrusion equipment, the low-temperature transmission of the cooling device is isolated, which solves the problem of fish scale pattern caused by the temperature drop of the sizing sleeve and ensures the forming quality of the PVC pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIZUISHAN PLASTIC FACTORY
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-17
AI Technical Summary
The cooling devices in existing PVC pipe extrusion equipment cause the sizing sleeve temperature to drop at high speeds, resulting in fish-scale patterns on the PVC pipe surface and affecting product quality.
A thermal insulation component, including a thermal insulation ring and a cooling ring, is installed between the cooling device and the sizing sleeve. The thermal insulation ring in a vacuum state isolates the low temperature transmission of the cooling component, preventing the temperature from being transmitted to the sizing sleeve. A vacuum pump and a one-way valve are used to maintain the vacuum state. The thermal insulation effect is improved by combining a heat radiation protection coating and a reinforced bracket.
This effectively avoids the impact of the sizing sleeve temperature drop on the PVC pipe surface, prevents the formation of fish scale patterns, and ensures the molding quality of the PVC pipe.
Smart Images
Figure CN224510376U_ABST
Abstract
Claims
1. A cooling device for PVC pipe extrusion equipment, characterized by: The device includes interconnected insulation and cooling components. The sizing sleeve, insulation component, and cooling component of the extrusion equipment are arranged sequentially along the extrusion direction of the PVC pipe. The insulation component includes an insulation ring coaxially connected to the sizing sleeve. The insulation ring is hollow inside, forming a closed cavity. The cavity can be operated to a vacuum state to isolate the low temperature generated by the cooling component and prevent the low temperature from being transferred to the sizing sleeve.
2. Cooling device according to claim 1, characterized in that The insulation ring has an air extraction hole that communicates with the cavity. The insulation assembly also includes a one-way valve that is sealed to the air extraction hole. The flow direction of the one-way valve is from the inside of the cavity to the outside.
3. The cooling device of claim 1, wherein: The insulation assembly also includes a pressure gauge mounted on the insulation ring to detect the pressure inside the cavity.
4. The cooling device of claim 1, wherein: The heat insulation ring has a heat radiation protection coating.
5. The cooling device of claim 1, wherein: The strength of the material used for the insulation ring is within a predetermined strength range; or, the insulation assembly may further include a reinforcing bracket disposed inside the cavity.
6. Cooling device according to any of claims 1 to 5, characterized in that: The cooling assembly includes a cooling ring coaxially connected to the insulation ring. The cooling ring is hollow inside, forming a cooling cavity. A cooling inlet and a cooling outlet are formed on the cooling ring, which communicate with the cooling cavity. The cooling inlet, cooling cavity, and cooling outlet form a flow channel for the flow of cooling liquid.
7. Cooling device according to claim 6, characterized in that The axial direction of the cooling inlet is parallel to the axial direction of the cooling outlet, and the direction of the cooling liquid flow inside the cooling inlet is opposite to the direction of the cooling liquid flow inside the cooling outlet.
8. The cooling device of claim 6, wherein: The cooling assembly also includes a guide plate disposed inside the cooling chamber, the guide plate guiding the flow from the cooling inlet to the cooling outlet.
9. The cooling device of claim 6, wherein: The cooling ring is detachably connected to the insulation ring.
10. A PVC pipe extrusion apparatus characterized by: It includes a sizing sleeve and a cooling device as described in any one of claims 1 to 9.