Forming method of blow molding hollow box body capable of internally provided with assembly and preformed molding plate device

Abstract

The invention provides a forming method of a blow molding hollow box body capable of internally provided with an assembly, which forms the hollow box body by molding sheet-shaped blanks in mold semi-molds, respectively tightly attaches the mold semi-molds to closed molding plate semi-plates through the action matching between the mold semi-molds and an expansion mechanism, the molding plate semi-plates and a base which are arranged in a preformed molding plate device and tightly attaches the sheet-shaped blanks positioned between the mold semi-molds to the mold semi-molds to be molded and preformed through blowing and / or inspiration and performed through the internally installed assembly. The invention also provides the preformed molding plate device, wherein the expansion mechanism and the molding plate semi-plates are arranged on the base; the base is arranged on a guide rail support frame; and a power device drives the base to move on the guide rail support frame. The invention reduces the equipment investment and the product cost and enhances the adaptability of the rough sheet-shaped blanks and the finished product ratio of products; in addition, the internally installed assembly decreases openings positioned on a container wall to the minimum, thereby realizing the low infiltration capacity of the formed hollow box body.

Description

technical field [0001] The invention relates to a method for forming a blow-molded hollow box, in particular to a method for forming a blow-molded hollow box with built-in components; the invention also relates to a preformed template device used in the molding method. technical background [0002] Automotive plastic fuel tanks have been widely recognized by customers for their light weight, good safety performance, corrosion resistance, impact resistance, long service life and greater design freedom. HDPE 6-layer co-extrusion blow molding technology with EVOH fuel barrier layer is the mainstream technology for plastic fuel tank manufacturing today. With the increasing awareness of environmental protection of the global government, relevant policies and regulations have put forward strict requirements for automobile OEMs. For example, California, the United States has introduced a regulation of quasi-zero emission (PZEV), and the penetration of the fuel tank assembly is less...

AI Technical Summary

Problems solved by technology

In order to achieve this goal, the following technologies are currently in use. For example, the INSHELL technology mainly uses the welding surface to cover the multi-layer board, and the pipeline is integrated inside the fuel tank to further reduce the gasoline penetration on the welding surface, but it requires laser Welding technology has greatly increased the investment cost of equipment and tooling; at the same time, there are SIB and ICS technologies, which are implemented by placing integrated component modules inside the box, and using the method of "fuel tank inside fuel tank" to reduce gasoline penetration, this method also leads to single The cost of each piece of product is greatly increased; there is also a flat sheet-shaped parison formed by the extrusion process, which is produced by using a special mold, which also has the problems of low production efficiency, high unit cost of the product and high equipment cost

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