Seamless splicing method for large insert of die-casting mold

Abstract

The invention relates to a seamless splicing method for a large insert of a die-casting mold. The seamless splicing method comprises the following specific steps that S1, a mounting hole of a mold core and the outer surface of the large insert are cleaned; S2, the large insert after cleaning is finished is put into a cooling tank, liquid nitrogen is introduced into the cooling tank, the large insert is cooled for 4-6 minutes, and the size of the large insert is continuously reduced; and S3, after cooling is finished, the cooled large insert is rapidly taken out and installed in the mounting hole of the mold core, the large insert and the mold core are located at the room temperature, and the size of the large insert is gradually restored to the original size along with temperature rise ofthe large insert. According to the method, the principle of expansion caused by heat and contraction caused by cold is utilized, the size of the large insert is reduced through liquid nitrogen cooling, then the cooled large insert is mounted in the mounting hole, the size of the large insert is restored to the original size along with temperature rise of the large insert, and interference fit between the large insert and the mounting hole is achieved.

Description

technical field [0001] The invention relates to the technical field of die-casting molds, in particular to a method for seamlessly inlaying large inserts of die-casting molds. Background technique [0002] Due to inconvenient processing, mold damage and other reasons on the die-casting mold, a series of inserts should be made on the mold. However, due to machining accuracy, technology and other reasons, there will be a certain gap between the insert and the mold core, resulting in the existence of burrs after the product is produced. Due to the large insert, if the interference fit is used directly, a huge press-fitting tool is required, and the mold is easy to be damaged during the process. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for seamless inlaying of large inserts in die-casting molds. Using the principle of thermal expansion and contraction, the large inserts are cooled by liquid nitrogen ...

AI Technical Summary

Problems solved by technology

However, due to processing accuracy, technology and other reasons, there will be a certain gap between the insert and the core, resulting in the existence of burrs after the product is produced.

Due to the large insert, if the interference fit is used directly, a huge press-fitting tool is required, and the mold is easy to be damaged in the process

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