Rotational moulding process for automobile body

Abstract

A rotational moulding process for automobile body includes steps of material addition: adding powdery plastic raw material into a die, and closing the die; heating: rotating the die in a heating chamber along a main axis and an auxiliary axis which are mutually perpendicular, heating, making the plastic raw material in the die to uniformly coat, melt and adhere to whole surface of the die chamber under gravity and heat energy action, wherein heating conditions are: wind heating, temperature of 310 DEG C to 350 DEG C, and time of 25-30 minutes; cooling: cooling the die in a cooling chamber, and keeping the die to rotate along the main axis and the auxiliary axis, wherein cooling conditions are: air flow cooling, and time of 50-60 minutes; and demoulding: taking the product out of the die. The invention not only can simplify automobile body structure and production process, and increase automobile body product strength and impact resistance, but also can reduce die quantity, shorten production period, reduce automobile body weight, and lighten automobile weight.

Description

Technical field: [0001] The invention relates to a manufacturing method of auto parts, in particular to a rotational molding process of an auto body. Background technique: [0002] Existing car bodies are mostly made of glass fiber reinforced plastics or iron sheets, and the body body and chassis are designed separately, and more than 20 inner and outer covering parts are also independently processed and formed. For example, the Chinese utility model patent 98110559.9 discloses a method for manufacturing a car body made of glass fiber reinforced plastics, which is realized through the following steps: (1) the outer shell of the car body is glued into shape; (2) the inner shell of the car body is glued into shape; 3) Make the body inner shell and the interior decoration parts into a whole; (4) Install the body inner shell in the body outer shell and insert the stabilizing nails, and at the same time pressurize the frame edges of the body outer shell and the body inner shell ...

AI Technical Summary

Problems solved by technology

The disadvantages of this manufacturing method are: A. The process is complicated and the production is cumbersome, which not only affects the work efficiency of the workers, but also causes the cost to increase greatly; 15MPA and 10MPA; C. The FRP body does not have the ability to recover from deformation. Once the body is deformed by collision, it usually needs to be replaced or repaired by external force; D. Since the parts in the body shell are formed separately and then glued As a whole, on the one hand, many sub-molds are needed, the cost is high, and on the other hand, the production cycle is also long; E. The weight of the FRP body is heavy, which cannot meet people's needs for lightweight vehicles, and also increases energy consumption.