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Golf club head fabrication method

  • US 5,772,527 A
  • Filed: 04/24/1997
  • Issued: 06/30/1998
  • Est. Priority Date: 04/24/1997
  • Status: Expired due to Fees
First Claim
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1. A golf club head fabrication method including the steps of:

  • i) preparing a rubber mixture by mixing a rubber with fillers, then pre-warming the rubber mixture thus obtained in a material tank of an injection molding machine at a temperature of about 60°

    C., and then delivering the pre-warmed rubber mixture to an injection molding tube of the injection molding machine which is heated to a temperature of about 70°

    C.;

    ii) preparing a club head casing having a front open chamber at its front side, a filling hole at one side in communication with said front open chamber, and an inside flange raised from a bottom side of said front open chamber around the border, then welding a face panel to the inside flange of said club head casing to close said front open chamber, and then filling a bonding agent through said filling hole into said front open chamber, and then pre-heating said club head casing at a temperature of about 100°

    C. for about 480 second; and

    iii) injecting said pre-warmed rubber mixture into said filling hole by said injection molding machine at an injection velocity of about 3.0 cm/sec, an injection pressure of about 100 kg/cm2, a mold closing pressure of about 150 kg/cm2, and an injection time of about within 10 seconds to 30 seconds, to mold a shock absorbing rubber in said front open chamber through a vulcanization process.

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