Push rod capable of exhausting

Abstract

The invention discloses a push rod capable of exhausting. The push rod comprises a push rod head, a tool withdrawal groove, a rod body and a suspension table, wherein the tool withdrawal groove is formed in the lower end of the push rod head; the rod body is arranged below the tool withdrawal groove; the suspension table is arranged at the bottom end of the rod body; an upper exhausting groove is formed in one side of the push rod head; a lateral exhausting groove is formed in the rod body; the lateral exhausting groove and the upper exhausting groove are formed in the same side; the lateral surface of the lateral exhausting groove is levelly connected with the tool withdrawal groove in parallel; a convex shoulder is arranged on the suspension table on the same side of the lateral exhausting groove in the rod body; the other side of the suspension table is level and parallel to the rod body without any convex shoulder. The push rod provided by the invention has the advantages of simple structure and convenience in repairing and assembling, so that the quality of a modeling product can be ensured; meanwhile, the modeling period can be shortened; energy consumed by an injector can be reduced; the production efficiency of injection molding is greatly improved.

Description

technical field [0001] The invention relates to an exhaustable push rod which can discharge gas in a mold cavity in time during injection production to ensure product quality. Background technique [0002] Injection mold is an important process equipment in plastic injection production. The injection mold belongs to the cavity mold. In injection molding, the moisture in the plastic evaporates at high temperature or the plastic additives decompose to form gas at high temperature, and the residual air in the cavity itself after mold closing will cause a large amount of air to accumulate in the mold cavity. When the plastic melt enters the cavity quickly for injection molding, these gases need to be discharged in time, otherwise the product will be partially carbonized and scorched due to the high temperature generated by the compression of the gas; or the injection pressure will increase due to the failure of the gas to be discharged in time, resulting in In addition, if the ...

AI Technical Summary

Problems solved by technology

The injection mold belongs to the cavity mold. In injection molding, the moisture in the plastic evaporates at high temperature or the plastic additives decompose to form gas at high temperature, and the residual air in the cavity itself after mold closing will cause a large amount of air to accumulate in the mold cavity. When the plastic melt enters the cavity quickly for injection molding, these gases need to be discharged in time, otherwise the product will be partially carbonized and scorched due to the high temperature generated by the compression of the gas; or the injection pressure will increase due to the failure of the gas to be discharged in time, resulting in In addition, if the gas cannot be discharged in time, the pressure in the cavity and the resistance of the melt to advance will increase, and eventually the filling speed of the melt will be reduced or defects such as insufficient filling will occur. Factors will ultimately affect the molding quality and injection molding cycle of the product, such as the formation of flow marks, air marks, weld lines, partial filling and dissatisfaction on the surface of the product, and even local flashing or local carbonization of the product.

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