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Actuator cooling apparatus and method

  • US 10,046,497 B2
  • Filed: 12/15/2016
  • Issued: 08/14/2018
  • Est. Priority Date: 11/23/2011
  • Status: Active Grant
First Claim
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1. An injection molding apparatus comprising a clamp plate mounted to a mold in spaced relationship, a heated manifold, an actuator comprising a housing body, and a cooling device that cools the actuator, wherein the manifold is disposed between the clamp plate and the mold and the housing body of the actuator is mounted in thermally conductive communication with the manifold,the cooling device comprising:

  • a heat transmitter comprising a distal arm or member and a proximal base or member mounted in heat conductive contact to the housing body of the actuator,the distal arm or member comprising a rod or tube slidably disposed within a complementary bore disposed within the proximal base or member, the complementary bore and the rod or tube being configured such that an exterior surface of the rod is slidably engaged in thermally conductive contact with and against an interior surface of the complementary bore,the rod or tube being comprised of a thermally conductive material having a distal end surface, the rod transmitting heat from the proximal base or member to the distal end surface via engagement of the exterior surface of the rod with the interior surface of the complementary bore,the rod or tube being mounted within the complementary bore via a spring loadable interconnection disposed between the proximal base or member and the rod such that the spring loadable interconnection can exert a spring load between the proximal base or member and the rod,the clamp plate, the mold, the manifold, the actuator and the heat transmitter being assemblable together in an arrangement wherein the spring loadable interconnection is loaded urging the distal end surface of the rod into compressed engagement with the clamp plate at least when the clamp plate, the mold, the manifold, the actuator and heat transmitter are assembled and the manifold is heated to an elevated operating temperature.

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