In 1838, in order to make molds for movable type printing, people invented die-casting equipment.
1. Cold partition Features: The gaps that appear when the metal flows with lower temperature butt but are not fused are irregular linear, there are two kinds of penetrating and non-penetrating, and there is a development trend under the action of external force.
1. Cold partition Exclusions: 1. Properly increase the pouring temperature and mold temperature. 2. Change the alloy composition and improve the fluidity.
Aluminum die casting is to melt aluminum into a liquid, inject it into the cavity of a die casting mold under high pressure and high speed, and after the aluminum is cooled by water, open the mold to obtain a molded product.
For prolonging the service life of precision die-casting molds, it is also more important to perform cooling work in time when the temperature is high.
Die-casting molds sometimes fail in the process of die-casting production. The causes of failure are mainly caused by the following three aspects. The following is a brief introduction: