Patent ID: 9138928
Filing Date: 2015-09-22
Classification: B29C

Abstract:
1. A cooling device for the drive for the adjustment of the needle of a needle valve nozzle in hot runner systems for injection molding machines, comprising: the drive is spaced apart from and mounted by at least one support to a retaining plate or the hot runner manifold of the injection molding machine and wherein a drive housing, in which the drive is accommodated, is connected, on the side facing the hot runner manifold, with a heat sink of the cooling device mounted by suspension from the drive housing such that it is connected and in contact only with the drive housing, which heat sink is a separate part spaced apart from and not in contact with the retaining plate or the hot runner manifold, wherein at least a portion of the heat sink of the cooling device is on the side of the drive housing facing the hot runner manifold without bearing the weight of the drive housing, the heat sink surrounding with a clearance the suspension mounting such that the heat sink is substantially free of load from beneath the drive housing and free of load caused by compression when the manifold expands through heating.