Polyurethane (PU) plastic sucking forming mould and forming method thereof

Abstract

The invention discloses a polyurethane (PU) plastic sucking forming mould and a forming method thereof. The PU plastic sucking forming mould comprises an upper mould, a lower mould and middle moulds. The upper mould and the lower mould are opposite to each other. The two middle moulds are symmetrically arranged between the upper mould and the lower mould. The upper mould extends to a forming bulge. A sealed forming cavity body is formed by the two symmetrical middle moulds and a forming downwards concave part of the lower surface of the lower mould. The bottom surfaces of the middle moulds are provided with rubber hollow sealing rings. The middle moulds are provided with positive pressure air ducts which are matched with the rubber hollow sealing rings. The positive pressure air ducts are connected with external air-pressure equipment. The positive pressure air ducts can jack the rubber hollow sealing rings out during working. Seamless matching between the middle moulds and the lower mould is achieved. According to the PU plastic sucking forming mould, when the PU plastic sucking forming mould is used, by using the above vacuum absorbability, tight absorbing between materials and forming cavity surface is achieved, during glue-injecting machining of small pressure values, good forming machining is completed, the structure is simple, using is convenient, forming of different stereo shapes can be achieved, and wide using and promoting valves are achieved.

Description

technical field [0001] The invention relates to the field of plastic parts molding, in particular to a PU plastic-absorbing molding mold and a molding method thereof, which can realize PU-type glued molding vertical parts, and can achieve better molding height and molding shape. Background technique [0002] PU adhesive molded parts are widely used in all kinds of clothing, shoes and bags, but the processing mold and processing technology of the current PU adhesive molded parts are relatively simple. There are obvious deficiencies. Specifically, the current PU adhesive parts include colloid and PU leather. When molding, the PU leather is placed in the mold, and the colloid is injected, and then the cavity is used to achieve bonding and molding. Due to the characteristics of PU leather material, as well as the limitation of molding materials and process requirements, the actual injection pressure of the colloid is relatively small, coupled with the molding characteristics of...

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Problems solved by technology

Due to the characteristics of PU leather material, as well as the limitations of molding materials and process requirements, the actual injection pressure of the colloid is relatively small, coupled with the molding characteristics of the material itself, the height of the façade that is expected to be formed is limited, and only curved and arched façades can be formed. Surface PU molded parts with glue, single shape, can not well meet the needs of production and use

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