keychain production knowledge

- Jan 22, 2019-

1. Mold manufacturing

The correct and reasonable mold is a prerequisite for the smooth operation of the machine, and plays an important role in ensuring the quality of the press and casting (the lower pass rate). The correct selection of various process parameters is the decisive factor for obtaining high-quality castings, and the mold is the premise of being able to correctly select and adjust various process parameters. The mold design is essentially a comprehensive reflection of the various factors that may appear in the production of the product. In the design of the mold, it is necessary to comprehensively analyze the structure of the pressure and casting, to be familiar with the operation process of the machine, to understand the possibility of adjustment of the machine and process parameters, to grasp the filling characteristics under different conditions, and to consider the method of mold processing and drilling. And in a fixed form, it is possible to design a mold that is realistic and meets the production requirements. Of course, the mold pattern can be carefully carved into different designs.

2, die casting process

Die Casting Introduction Pressure casting is called die casting. It is a casting method in which a molten alloy liquid is poured into a pressure chamber to fill a cavity of a steel mold at a high speed, and the alloy liquid is solidified under pressure to form a casting. The main features of die casting that distinguish it from other casting methods are high pressure and high speed. The molten metal fills the cavity under pressure and crystallizes at a higher pressure. The common pressure is 15-100 MPa. The molten metal fills the cavity at a high speed, usually at 10-50 m/s, and some can also exceed 80 m/s (the line speed of the cavity introduced into the cavity through the gate) - the filling speed of the gate, so the charging of the molten metal The type of time is extremely short, about 0.01-0.2 seconds (depending on the size of the casting) to fill the cavity.

3, stamping process

The stamping process can be roughly divided into two categories: separation process and forming process (also divided into bending, deep drawing, and forming). The separation process is to separate the stamping parts and the blanks along a certain contour line in the stamping process, and the quality of the separated sections of the stamping parts also meets certain requirements; the forming process is to plastically deform the stamping blanks without breaking. And into the required shape of the finished product, but also meet the requirements of dimensional tolerances. According to the temperature conditions at the time of stamping, there are two methods of cold stamping and hot stamping. This depends on the strength, plasticity, thickness, degree of deformation, and equipment capabilities of the material, as well as the original heat treatment state and end use conditions of the material. Through the pressure of the machine, the upper and lower molds press the plate between the molds to reach a certain pressure, and the mold pattern is deeply printed on the plate.