B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/703
B29C 45/28 (2006.01)
Patent
CA 1177213
ABSTRACT OF THE DISCLOSURE This invention relates to a hydraulically actuated valve gated injection molding system. The valve pin actuating mechanism has a piston which engages the driven end of the valve pin and reciprocates in a cylinder in alignment with the valve pin. The cylinder is bolted directly to the back plate and has a mouth which is also in alignment with the valve pin and is sealed by a separately removable cap. In order to compensate for accumulations of tolerances and have the valve pin seat accurately to avoid drooling or breakage of the seat, it is desirable to accurately measure the necessary length of valve pin after the remainder of the system has been assembled. The mouth of the cylinder is larger in diameter than the piston to allow these measurements to be taken, the proper length valve pin to be attached to the piston outside the cylinder, and the assembly to then be inserted through the mouth. This structure provides for accurate measurement of the necessary length of valve pin after assembly of the rest of the system, as well as for convenient installation of the valve pin without disassembling the system.
398866
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Gellert Jobst Ulrich
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