B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/711
B29C 45/38 (2006.01) B29C 45/28 (2006.01)
Patent
CA 1193817
ABSTRACT OF THE DISCLOSURE This invention relates to an injection molding system with core ring gating which is used for making products with an opening through them formed by the valve pin. The system has a melt passage which conveys pres- surize melt from a molding machine through a manifold to a bore in a gate insert, through which it flows along around the valve pin to the gate. The valve pin has a head portion extending from a reduced neck portion. The gate and the opening through the cavity are in alignment and substantially equal in diameter and the head portion of the valve pin fits closely through them into a bore in the ejector side of the mold. Actuating mechanism drives the valve pin forwardly to the open position in which the reduced neck portion extends past the gate into the cavity to allow the pressurized melt to flow into the cavity. The valve pin is then retracted to the closed position on which the head portion closes off the gate. One portion of the head portion is hollow to form an insulative air space and another portion adjacent the tip end is filled with a beryllium copper plug. This structure provides the advantage for large diameter valve pins of improving the cooling rate in the closed position. The air space reduces the mass of the head portion of the valve pin and reduces the flow of heat into the head portion. The highly conductive plug increases the transfer of heat away from the head portion to the cooled mold platen.
422305
Bereskin & Parr
Gellert Jobst Ulrich
LandOfFree
Injection molding core ring gate system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Injection molding core ring gate system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection molding core ring gate system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1182851