Patent ID: 6945765
Filing Date: 2005-09-20
Classification: B29C

Abstract:
1. A hydraulic clamping device for a molding machine, comprising: first and second mold support platens, one of said mold support platens being movable in respect to the other one; a tie-bar axially extending from one of the platens, said tie-bar having a toothed head at one end bearing a single set of coplanar perpherally spaced teeth; mold-thickness adjustment and tie-bar clamping means on the other one of said platens, for clamping the toothed head of the tie-bar, said mold-thickness adjustment and clamping means comprising: a clamping sleeve and piston unit having a tie-bar passing through hole, and axially spaced apart tooth members inside the clamping sleeve; said clamping sleeve and piston unit being axially movable and rotatably supported relative to said tie bar for a fine adjustment of its position and to selectively engage and disengage the toothed head of the tie-bar in a plurality of axially spaced-apart locking positions defined by said tooth members of the clamping sleeve; and control means to rotate the said sleeve and piston unit in each of said locking positions defined by the tooth members of the clamping sleeve.