| 摘要 |
An extrusion die plate and method of making same, the die plate having a die plate body with a die plate face, and a plurality of extrusion passageways in the die plate body terminating generally at the die plate face. Discreet, spaced extrusion port formations made of a unitary body of a machinable material of greater hardness than the material of the die plate body are positioned on the die plate body, each of the formations defining an extrusion port which registers with a respective one of the extrusion passageways in the die plate body, the extrusion port defining a terminal extrusion orifice, each of the formations having a substantially planar discharge surface surrounding the extrusion orifice, the respective discharge surfaces being substantially coplanar with each other and with an abrasion resistance facing positioned on the die plate face, the facing substantially filling the space between the extrusion port formations and, together with the discharge surfaces on the extrusion port formations, forming a substantially planar discharge face.
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