Tungsten Carbide Button TPA Mould Design

Tungsten carbide button density is an important factor which affects tungsten carbide button quality. Apart from choosing proper pressing method, the size of material forming zone is very important.

If the forming zone is too low, the upper punch can not reach to the metal powder, and the lower punch can not reach the top layer which will cause the high pressure of the lower layer thus the density is uneven. And also the size of finished product will be too small.

If the forming zone is too high, both the upper punch and lower punch will not have enough power to press the middle layer. As a result the density in the neutral layer is lower than the other part. The punch needs to go deep inside the mould which will cause air block in the mould; the metal powder will stick to the punch and will cause damage. Also the mould will be overloaded; size of tungsten carbide button will be too large.

Only when the forming zone height is proper, the pressure on neutral layer from upper and lower punch is even, tungsten carbide button will be high density and quality. 


Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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