*temperature:

Before the extrusion operation, the die was heated to 350°C. The temperature of the it should not fall below 250°C during the extrusion operation. At the end of operation, the die was cooled to ambient temperature and that should not be cooled with water.

* Hair crack:

A small crack has occurs at the entrance R corner. It will not damage the function of the mold. Only when the extruded material adheres to these hairline cracks is it necessary to modify the die.

Therefore, to recommend using fine cotton cloth and diamond paste for hand polishing.