Unlock instant, AI-driven research and patent intelligence for your innovation.

Injection molding process of PC (poly carbonate) plastic car lamp shade

A technology for car lampshades and plastics, which can be applied to other household appliances, frames, household appliances, etc. It can solve problems such as difficult to meet production requirements, complicated process steps, and affect the quality of finished products, so as to achieve good surface finish and good dimensional stability of products , Reduce the effect of molding cycle and production cost

Inactive Publication Date: 2013-07-10
JIANGSU HONGCHANG SCI & TECH
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The known injection molding process of plastic parts mainly includes 4 stages: filling-holding-pressure-cooling-demolding. These 4 stages directly determine the molding quality of the product. However, the existing injection molding process There are still some defects in the process, such as complex process steps, long cycle and high cost, which will affect the quality of the finished product, and it is difficult to meet people's production requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A PC plastic car lamp shade injection molding process, comprising the following steps:

[0014] 1. Raw material drying treatment: use an oven to dry the PBT plastic for 3 hours, and heat it to 120±5°C;

[0015] 2. Pretreatment of injection molding system and injection mold: preheat the injection molding system and injection mold, the first stage is 240±10°C, the second stage is 235±10°C, the third stage is 230±10°C, the fourth stage is 230±10°C, the fifth stage is 220± 10°C;

[0016] 3. Plasticization: Add the pretreated PC plastic in step 1 to the injection molding system in step 2, and heat it to a molten state at the same time;

[0017] 4. Injection: The injection pressure of the first stage is 80±10 bar, and the time is 10s; the injection pressure of the second stage is 45±10 bar;

[0018] 5. Holding pressure: the holding pressure is 40±10 bar, and the time is 10s;

[0019] 6. Cooling molding: cooling molding time is 35s;

[0020] 7. Demoulding: Demoulding while...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an injection molding process of a PC (poly carbonate) plastic car lamp shade. The injection molding process comprises the following steps of: (1) raw material drying; (2) pretreatment by using an injection molding system and an injection mold; (3) plasticizing; (4) injection; (5) pressure maintaining; (6) cooling forming; and (7) demolding. According to the invention, the forming cycle and production cost of a car lamp liner frame are reduced, and the quality of a finished product is effectively improved. The prepared car lamp shade is simple in producibility, has high impact resistance, high strength, excellent chemical resistance, good dimensional stability and good surface smoothness.

Description

technical field [0001] The invention relates to an injection molding process of an injection-molded PC plastic car lamp shade. Background technique [0002] The known injection molding process of plastic parts mainly includes 4 stages: filling-holding-pressure-cooling-demolding, etc. These 4 stages directly determine the molding quality of the product. However, the existing injection molding process is in the process of implementation. There are still some defects in the process, such as complex process steps, long cycle and high cost, which will affect the quality of the finished product and are difficult to meet people's production requirements. Contents of the invention [0003] In view of the above deficiencies, the purpose of the present invention is to provide a PC plastic car lamp shade injection molding process, which can reduce the molding cycle and production cost of the car lamp lining frame with simple implementation steps, and effectively improve the quality o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B29C45/76B29B13/06B29L12/00
Inventor 杜正清高菲菲陈正洪
Owner JIANGSU HONGCHANG SCI & TECH