| 摘要 |
PURPOSE: To obtain a die plate having an insert locked firmly by containing the insert in the seat of a plate, setting the dimensions of the base surface of the insert larger than those of the opposite surface and conducting the base surface with an opening of small dimensions at the seat. CONSTITUTION: Each nozzle 2 of a die plate 1 is provided with an insert 3 of hard material having a circular upper base part 3a and an elliptical lower base part 3b wherein a shaft 21 has the same diameter as the base part 3a and a spindle a2 has a larger diameter. A seat 4 of the plate 1 has a circular base surface 4a equal to or slightly larger than the spindle a2 of the insert 3, an opening 4b at the seat 4 is elliptical and a spindle b1 is equal to or slightly larger than the shaft a1 of the insert. Corresponding shafts a1, b1 of the insert and the seat are arranged in parallel and the insert 3 is disposed on the inside of the seat 4 before turning the insert 3 by 90 deg.. A region 7 left between the insert and the seat is filled by brazing.
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