| US 7,497,678 B2 | ||
| Clamp piston assembly with mold break function | ||
| Pierre Glaesener, Bissen (Luxembourg); Christophe Halter, Selange (Belgium); and Joaquim Martins Nogueira, Everett (Canada) | ||
| Assigned to Husky Injection Molding Systems Ltd, Bulton ON (Canada) | ||
| Filed on Jul. 05, 2007, as Appl. No. 11/773,530. | ||
| Prior Publication US 2009/0011072 A1, Jan. 08, 2009 | ||
| Int. Cl. B29C 45/64 (2006.01) | ||
| U.S. Cl. 425—190 [425/451.9; 425/595] | 18 Claims |
| 1. A self-positioning clamp assembly comprising:
a clamp up chamber arranged to effect, in use, movement of a clamp piston in a first axial direction;
a mold break chamber arranged to effect movement of the clamp piston in a second axial direction opposite to the first axial
direction; and
a position reset chamber in which a reset piston is operative and independently moveable from the clamp piston;
a first reference shoulder against which the reset piston is selectively both engageable and separable; and
a second reference shoulder being moveable relative to the first reference shoulder and against which the second reference
shoulder the reset piston is selectively both engageable and separable;
wherein an axial reference position for the self-positioning clamp assembly occurs with simultaneous engagement of the reset
piston against both the first reference shoulder and the second reference shoulder.
|