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Points for attention when using die casting machine punch

November 18,2020.

In the process of die casting machine production, the punch is easy to wear, and the easy wear of the punch will directly affect the appearance of the die casting or the return of the material, which will also increase the cost of the factory invisibly. How do we use and choose talents? Put the punch into full play and improve work efficiency.

At present, the types of die-casting machine punches on the market are roughly divided into gray iron punches, ductile iron punches, 45 steel high frequency punches, H13 die steel alloy punches, beryllium bronze punches, nano-ceramic laser punches, ceramic punches, etc. The surface hardness of the punch is recommended to heat treatment hardness HRC45±2 degrees. The hardness is too high, it is easy to wear the barrel, resulting in the early scrap of the barrel; if the hardness is too low, the punch is easy to wear, which will reduce the service life of the punch.

The good lubrication of the die-casting machine punch is an important link to prolong the life of the die-casting machine punch. Therefore, how to choose and use the punch lubricant is very important. At present, the commonly used lubricants are mineral oil-based and graphite-containing and Graphite-free punch lubricants, synthetic-based water-soluble lubricants, and waxy granular lubricants.

  In the production process, the die-casting machine punch should be used reasonably and the method can be appropriately extended. In fact, the service life of the punch must be comprehensively measured in the entire die-casting system to get the ideal configuration.

The die-casting machine punch and the feeding barrel are interdependent systems, and the punch slides linearly in the feeding barrel. Considering the manufacturing error, installation error, and the thermal expansion coefficient during use, there should be a certain amount between the punch and the feeding barrel. It is not good if the fit clearance is too large or too small.

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