Gas-assisted injection molding die and injection molding method

Abstract

The invention provides a gas-assisted injection molding die and injection molding method. The gas-assisted injection molding die comprises a fixed die body and a moving die body, wherein the fixed die body is connected with the moving die body, and comprises a panel, a sprue plate and a plate A; the panel is arranged at the top of the fixed die body; the sprue plate is arranged at the lower part of the panel; the plate A is arranged at the lower part of the sprue plate; the moving die body comprises a plate B, two pieces of square iron, a baseplate, an oil cylinder and a sliding block embedded needle guide block; the baseplate is arranged at the bottom of the moving die body; the two pieces of square iron are arranged at the upper parts of two sides of the baseplate; the middle parts of the two pieces of square iron are of hollow structures; the plate B is arranged at the upper parts of the two pieces of square iron; the sliding block embedded needle guide block is arranged at the front end of the plate B; and the oil cylinder is connected to the front part of the plate B. The gas-assisted injection molding die provided by the invention is reasonable in design and convenient to use, and has the advantages that through gas-assisted molding, a hollow wheel can be manufactured instead of an original solid thick-rubber wheel, so that the product weight is reduced, shrinkage caused by thick rubber is avoided, the intrinsic stress is reduced, and the injection molding cycle is shortened.

Description

technical field [0001] The invention specifically relates to a gas-assisted molding injection mold and an injection molding method. Background technique [0002] Gas-assisted molding in plastic molds usually refers to nitrogen-assisted molding. The molding method is mainly used for products with uneven meat thickness, relatively large and complex structures, which can save materials and avoid shrinkage and material shortage caused by uneven meat thickness. Gas-assisted injection molding is a novel plastic molding technology that introduces high-pressure gas into the thick-walled part of the part to create a hollow section inside the injection part, complete the filling process, realize gas pressure retention, and eliminate product sink marks. The traditional injection molding process cannot combine thick wall and thin wall together, and the residual stress of the part is large, easy to warp and deform, and sometimes there are sink marks on the surface. The newly developed ...

AI Technical Summary

Problems solved by technology

The traditional injection molding process cannot combine thick wall and thin wall together, and the residual stress of the part is large, easy to warp and deform, and there are sink marks on the surface

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