Double-layer PE large-scale hollow blow molding barrel and production process thereof

Abstract

The invention discloses a double-layer PE large-scale hollow blow molding barrel and a production process thereof. The double-layer PE large-scale hollow blow molding barrel comprises a blow molding barrel body, the blowing barrel body comprises an outer coloring layer and an inner raw material natural color layer, the inner raw material natural color layer is located inside the outer coloring layer, the outer coloring layer and the inner raw material natural color layer form a double-layer type blank in a material storage die head, the outer coloring layer and the inner raw material natural color layer are connected in an extruding and hot melting mode in an extrusion die head to form a whole, and the outer coloring layer and the inner raw material natural color layer form an integral layer. According to the double-layer PE large-scale hollow blow molding barrel and the production process, a hollow blow molding mode is adopted, plastic molecules are stretched in two directions duringmolding, the orientation is sufficient, so that the product performance is greatly improved on the basis of injection molding, the durability of the product is improved, the using cost of a user is reduced, the product forming mold is designed in a two-blank simultaneous injecting symmetry mode, the large-gas-quantity double-needle side blowing is adopted, top blowing is used for cooperating auxiliary molding in process at the same time, so that the production efficiency is improved by one time while the product performance is ensured compared with that of a single-cavity mold.

Description

technical field [0001] The invention relates to the technical field of plastic product production, in particular to a double-layer PE large-scale hollow blow molding barrel and a production process thereof. Background technique [0002] Plastic barrels are mostly used for storage and transportation of various liquids, and have good characteristics for special dangerous goods packaging. They are not fragile, rust-free, light in weight, etc., and have excellent oil resistance and strong corrosion resistance. Insulation, moisture-proof, pressure-resistant, and corrosion-resistant dangerous goods packaging, plastic barrels are mostly made of polyethylene, polypropylene, polyester and other plastics. [0003] However, the existing large-scale plastic barrels have the following disadvantages: At present, such plastic barrels on the market are all injection-molded, and the products are of a single-layer structure, and color masterbatches are added during product processing to obtai...

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Problems solved by technology

[0004] The object of the present invention is to provide a double-layer PE large-scale hollow blow-molded barrel and its production process, to solve the problem mentioned in the above-mentioned background technology that such plastic barrels on the market are all injection-molded, and the products are single-layer structures, and Color masterbatches are added during product processing to obtain a good appearance of the product. The use of environmental protection is not good, and the injection molding process determines the molecular orientation defect of the plastic molecule during the molding process. The impact strength and tensile strength of the product are not ideal, and the product is easily damaged. question

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