Method for making cylindrical toothed drill of nodular graphite cast iron

Method for making cylindrical toothed drill of nodular graphite cast iron

  • CN 1,028,502 C
  • Filed: 04/30/1990
  • Issued: 05/24/1995
  • Est. Priority Date: 04/30/1990
  • Status: Active Grant
First Claim
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1. , method for making cylindrical toothed drill of nodular graphite cast iron, technological process divides wind hole, edge alloy column for system punching block and sandbox, moulding, cast, sand removal, heat treatment, brill, it is characterized in that in the moulding operation, increase a core 2, the bottom fixed support iron 1 of core center core iron 3 in the die cavity centre;

  • Core has steam vent 9;

    Steam vent 8 on the fixed core disk 4 is communicated with the steam vent 7 of cap mouth sandbox 11;

    Ingate 5 on the fixed core disk 4 is communicated with the pouring basin 6 of cap mouth sandbox 11.

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