mold home news: good casting structure design, casting wall thickness as uniform as possible, to avoid hot spots, so as to reduce the thermal fatigue caused by local heat concentration of the mold. The corner of the casting shall have appropriate casting fillet to avoid stress caused by sharp corner on the die.
Reasonable die structure design
- 1) Each element in the mold shall have sufficient stiffness and strength to bear pressure without deformation. The wall thickness of the die should be sufficient to reduce deformation.
- 2) The gating system is designed to minimize the impact and erosion on the core.
- 3) Correctly select the tolerance fit and surface roughness of each element.
- 4) Maintain mold heat balance.
Standardize heat treatment process
The metallographic structure of the material can be changed by heat treatment to ensure the necessary strength, hardness, dimensional stability at high temperature, thermal fatigue resistance and material cutting performance.
The correct heat treatment process will get the best die performance, and the performance of steel is controlled by quenching temperature and time, cooling rate and tempering temperature.
Die casting production process control
- 1) Temperature control: preheating temperature and working temperature of die; The alloy pouring temperature shall be lower on the premise of ensuring good molding.
- 2) Reasonable die casting process: specific pressure and filling speed.
- 3) Adjust the clamping force of the machine to make the force on the die uniform. Pay attention to cleaning the residual chips on the die surface to avoid uneven stress on the die surface and deformation caused by these superfluous objects during die closing.
- 4) The alloy melting shall be strictly controlled to reduce the gas in the molten metal.
- 1) Periodic stress relief
- 2) Mold repair
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