| Differences in processing between 400 series and 300 series 1.Drawing technics of 400 series A. The clearance proportion in moulds of 400 series is smaller than that of 300 series, and the pressure on edge is also smaller. B. The angle of the concave mould of 400 series is smaller than that of 300 series. C. 400 series needs approx. 1-2.5% larger material area than that of 300 series. 2. Polishing technics of 400 series
A. Polishing of 400 series is a little more difficult compared with 300 series. We suggest polishing with or water if it is allowed. B. Generally the polishing time of 400 series is not longer than that of 300 series if under the same requirement. 3. To avoid the cost increase in polishing of 400 series, we must strictly control the material drains during drawing. Please use the material of better heat resistance and abrasion resistance to manufacture the moulds. |
