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Mold attaching method to mold clamping device

  • US 10,493,679 B2
  • Filed: 04/16/2015
  • Issued: 12/03/2019
  • Est. Priority Date: 04/17/2014
  • Status: Active Grant
First Claim
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1. A mold attaching method comprising the following steps:

  • providing a mold clamping device including;

    a rotary platen having a predetermined number of clamp portions corresponding to a number of molds and a mold attachment surface;

    a movable platen supporting the mold attachment surface of the rotary platen; and

    a fixed platen having a mold attachment surface that is opposite to the mold attachment surface of the rotary platen and having a predetermined number of clamp portions corresponding to the number of molds,providing only a first mold between the movable platen and the fixed platen,exerting a mold clamping force to only the first mold that is limited to a limited mold clamping force lower than a mold clamping force at a time of molding,setting a mold attaching mode having an interlock function of preventing the mold clamping force from being cancelled until a condition under which all the clamp portions are actuated is satisfied, thenproviding a second mold between the movable platen and the fixed platen, and thenexerting a mold clamping force to the second mold that is limited to the limited mold clamping force,wherein in the mold attaching mode, a number of all the clamp portions is previously set at a setting value, and the interlock function is cancelled on condition that a number of clamp portions which are turned on when the mold is attached, is counted, and that a count value counted reaches the setting value, wherein the setting value is greater than one,wherein after completing the mold attaching mode, performing post-attachment processing comprising the following steps;

    setting each of the clamp portions to a maximum mold clamping force,determining a thickness of the molds,performing a primary mold closing step for the molds,turning off at least one of the clamp portions,performing a secondary mold closing step for the molds,turning on the at least one clamp portion, andsetting each of the clamp portions to the maximum mold clamping force, andwherein the limited mold clamping force is set within a range of 5 to 25% of the maximum mold clamping force to allow for the adjustability of the respective mold to ensure that the mold clamping force for each of the molds are balanced with respect to the other molds, and to allow for the removal of a mold that is improperly clamped.

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