Die-casting mold and method for thin-walled electrical connector shells

Abstract

The present invention discloses a die-casting mold structure for a thin-walled shell for electrical connectors and a method for designing the mold structure. The runner of the mold structure includes a longitudinal runner, a transverse runner, an end runner, and an in-gate connected sequentially. The cross-sectional areas of the longitudinal runner, the transverse runner, the end runner, and the in-gate decrease progressively. The cross sections of the longitudinal runner and the transverse runner may be oval or circular in shape. The perimeter-to-area ratio of the oval cross section of the longitudinal runner and of the transverse runner is smaller than the ratio for a runner with a rectangular cross section of the same area. The method may be used to calculate the in-gate area. Cold shuts and gas entrapment during the molding process are reduced, enhancing the quality of the thin-walled shell and raising the efficiency of the design process.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority, under the Paris Convention, of Chinese patent application, application number 201310292972.8, filed on Jul. 12, 2013 in the Intellectual Property Office of the People's Republic of China. The disclosure of the Chinese application is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to technology for manufacturing electrical connectors and, in particular, to a die-casting mold for manufacturing thin-walled shells for electrical connectors and a method for designing the die-casting mold. 2. Description of Related Art[0004]An important component of an electrical connector, such as an HDMI interface (High-Definition Multimedia Interface) connector or other digital audio / video interface, is a thin-walled shell. Traditionally, thin-walled shells for electrical connectors are manufactured by sheet metal stamping, ...

AI Technical Summary

Benefits of technology

The present invention aims to provide a die-casting mold structure for a thin-walled shell for electrical connectors that can overcome the shortcomings of conventional die-casting mold structures. This mold structure may prevent or reduce the occurrence of cold shuts and gas entrapment, thus increasing the product yield of the thin-walled connector shells and reducing manufacturing costs. The design process of the mold structure may be efficient and the quality of the casting may be ensured. The shape of the cross section of the longitudinal and transverse runners may reduce the resistive and thermal loss due to the viscosity of the molten metal, alleviating the problem of cold shuts. A quadratic function may be used to describe the relationship between the total mass of the casting and the area of the in-gate, reducing the time required for designing the mold structure.

Problems solved by technology

However, merely reducing the conventional die-casting mold structure to manufacture thin-walled connector shells may lead to manufacturing problems.

These problems, which may include cold shuts and gas entrapment, reduce the product yield of the thin-walled connector shells and increase the cost of manufacturing.

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