After the metal spinning process is formed, the product will stick to the mold, and it is difficult to take it out from the mold, which will affect the production efficiency.
Therefore, it is necessary to consider the issue of mold release.
Generally, the demolding methods used by metal spinning machines mainly include the following types.
Air pressure demoulding is an economical and simple demoulding method commonly used. After the product is processed, the machine tool releases gas through the air blowing hole to form a certain air pressure, release the tail top, and the product loses the thrust of the tail top. Because the air pressure accumulated in the blowing hole is greater than the external air pressure of the product, the air pressure thrust will make the product easily fall out of the mold. However, the air pressure should be adjusted within a reasonable range. If the air pressure is too small, the demoulding will not be smooth; if the air pressure is too high, the product will fly out of the mold and be damaged.
For some processed products with high product height, in addition to designing the demoulding angle, another way is to make an inlay mold in the spindle mold, and the other side of the inlay mold is connected to the rotary cylinder. After the metal spinning process of the product is completed, the rotary oil cylinder is extended to drive the product and the tail top mold to be demoulded smoothly.
For some special-shaped products, three types of molds are usually designed for demoulding. The first is a combination type, the second is a petal mold, and the third is an eccentric mold. Different products require different release methods, which may sometimes be used in combination. Therefore, when designing a metal spinning machine, the assembly flexibility of the core mold should be considered.
