山东LOCKING TONGUE

Considering that the machining of accessories is complex, the processing cost is high, and the material utilization rate is low, MiM process has developed many applications, including special-shaped milling cutters, cutting tools, fasteners, micro gears, cotton loosening machines, textile machines, crimping machine parts, etc.

The typical one is the oblique tongue of the lock cylinder lock case. The oblique tongue of the lock cylinder lock case is an important part of the door and window lock and the cash register lock. Its material is generally 304, 316, 17-4PH stainless steel and brass. Here we mainly describe the MIM injection molding powder metallurgy process of stainless steel 304, 316, 17-4PH materials.

Because of the complex shape and high matching accuracy of the lock cylinder and lock case, the traditional machining or precision casting process cannot meet the technical requirements, including wear resistance, rust resistance, surface roughness, etc. Therefore, powder metallurgy injection molding process of MIM stainless steel with higher technical content is a good option.

The opening of the MIM stainless steel powder metallurgy injection molding mold with the lock cylinder and lock shell inclined tongue is a key option. First, scale the die size according to the size requirements of the lock cylinder and lock shell. In terms of die material selection, reasonable application is required, some use high-speed steel DC53, some need wear-resistant tungsten alloy YG8, etc. MIM stainless steel powder metallurgy injection mold is similar to plastic injection mold in structure, and the injection production process is also similar. The MIM stainless steel powder metallurgy injection molding mold of the lock cylinder lock housing oblique tongue includes the mold base and the mold core part.

The MIM stainless steel powder metallurgy injection molding machine for processing the lock cylinder and lock case oblique tongue is generally selected from the Haitian injection molding machine which is relatively stable on the market. According to the structure, size and other factors of the product, the injection molding quantity is one out of one, one out of two, one out of four, etc.

After the stainless steel metal MIM powder metallurgy injection processing lock cylinder lock case oblique tongue raw blank comes out, the next step is to degrease. At a certain temperature, use the MIM stainless steel powder metallurgy injection molding degreaser to remove the plastic materials inside. The temperature and time must be well controlled. If it is removed too quickly, the lock cylinder lock case oblique tongue raw blank will burst, if it is removed too slowly, it will not be clean, which affects the sintering quality of the product

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After degreasing, sintering is a technical activity for MIM powder metallurgy injection processing of raw oblique tongue blank of lock cylinder and lock shell. The placement of green sintering, sintering temperature, sintering time, sintering atmosphere and vacuum degree are all technical activities. Otherwise, the oblique tongue of lock cylinder and lock case is easy to cause uneven size control, sintering deformation, deviation of fitting tolerance, uneven shrinkage, etc.

After the sintered blank of oblique tongue of lock cylinder and lock shell produced by MIM powder metallurgy injection processing, according to the technical requirements, some need to be threaded, some need to be finished to ensure the dimensional accuracy, and some need to be polished and sandblasted for deburring. Finally, the finished product is inspected and packaged.