Injection molding technique for automobile body panel and electric automobile fender

Abstract

The invention discloses an injection molding technique for an automobile body panel and an electric automobile fender. The injection molding technique comprises the steps that long glass fiber reinforced PP materials or nylon is used as mold filling materials, wherein the mass ratio of the long glass fiber reinforced PP materials or the nylon is 30%-50%; the mold filling materials are added into a charging barrel of an injection molding machine, the set mold temperature is 50-70 DEG C, the material temperature is 200-240 DEG C, the melting temperature is 260-290 DEG C, the fluid front temperature is 240-270 DEG C, and the shearing force is controlled to smaller than 0.25 MPa; the injection molding machine is started to conduct injection mold filling after the set temperatures are reached, the filling time is 3s-4s, the injection pressure is 40-70 MPa, and when the pressure in a mold cavity is increased to the injection pressure from 0 MPa along with filling, the pressure is maintained for 28s-35s; and the mold is opened when a workpiece is cooled to the temperature of 60-80 DEG C after pressure maintaining, and the workpiece is ejected out through an ejection rod and then is taken. According to the injection molding technique, the technological process can be simplified, the production cost is reduced, and low weight of an automobile body can be achieved easily. The electric automobile fender has the advantages of being low in weight, good in strength and the like.

Description

technical field [0001] The invention relates to the technical field of auto parts processing, in particular to an injection molding process of a vehicle body cover and an electric vehicle fender. Background technique [0002] Automobile panels refer to the surface or internal parts of the space shape made of thin metal plates that cover the engine, chassis, cab, and body. According to function and location, it can be divided into three categories: external covering, internal covering and skeleton covering. Traditional body panels are mainly made of metal plates, which are formed by stamping. The basic processes include blanking, pre-bending, drawing, trimming, punching, flanging, shaping, etc., generally requiring 4 to 6 processes. After stamping, welding and other processes are required to complete the final automotive panel. The above-mentioned manufacturing process is complicated, the production efficiency is low, the equipment and labor costs are high, and the quality ...

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Problems solved by technology

Chinese patent literature records a lightweight front fender, the application publication number of which is CN104228972A, because the fender only uses partial injection molding, the structure of the fender is relatively complicated, and the forming process is cumbersome, which is not conducive to i

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