Die casting die extruding pin special structure

Abstract

The invention discloses a die casting die extruding pin special structure. The die casting die extruding pin special structure comprises a fixed die sleeve plate and a fixed die insert connected withthe fixed die sleeve plate in a matched mode. The fixed die sleeve plate is internally provided with a first hollow structure and a second hollow structure. The first hollow structure is internally provided with an extruding oil cylinder. The second hollow structure is internally provided with a connecting plate. An extruding pin is arranged on the connecting plate. A T-shaped hollow cavity is formed in the extruding pin. A core needle is detachably arranged in the T-shaped hollow cavity. An extruding pin needle sleeve is detachably arranged between the extruding pin and the fixed die insert.According to the die casting die extruding pin special structure, the extruding oil cylinder is used for pushing the extruding pin to move and combined with the extruding pin needle sleeve and the core needle for extruding the outside and / or inside of a die casting while precasting a needle hole so that outside and / or inside shrinkage cavity and porosity defects can be eliminated, meanwhile, the effect that the position of the core needle is not deviated in the operation process can be ensured, and the effect that the size of the core needle hole is stable and unchanged is ensured.

Description

Technical field [0001] The invention belongs to the technical field of die-casting molds, and more specifically, relates to a special structure of a die-casting mold extrusion pin. Background technique [0002] Die casting, or pressure casting, is a metal casting process that presses high-temperature liquid metal into a mold cavity under high pressure. The structure of the cavity is the same as the structure of the product to be formed. After the liquid metal in the cavity is cooled and solidified , Take it out, it is the workpiece to be formed. [0003] When the die casting method is used to produce molds, due to the diverse structures of die casting products, some die castings have thicker internal walls and more channels inside, which are prone to casting defects such as shrinkage holes and porosity. In order to solve the above problems, some companies try to install some auxiliary structures such as extrusion pins on the mold, and eliminate the internal shrinkage cavity and sh...

AI Technical Summary

Problems solved by technology

This structure has the following defects: (1) Pre-cast holes cannot be formed during extrusion, and the pre-cast holes can only be canceled for parts with dense holes, resulting in local thick castings and increased machining allowances, which cannot eliminate shrinkage cavities , shrinkage and other internal defects; (2) The core needle affected by the extrusion pin inside the mold is easy to break or deform, which not only seriously affects the quality of the product, but also aluminum material will enter the broken needle part of the mold, affecting the progress of mold maintenance , delaying a lot of manpower time and reducing production efficiency

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