Safety cover for injection molding machine
OwnerKarl Hehlinventor
Life of this patent
Estimating the term…
Abstract
A safety cover assembly for the die closing unit of an injection molding machine having three jointly or separately openable safety gates on the front, top and rear of the unit supported in a cantilever-type guide arrangement on a U-shaped supporting frame, and a stationary cover assembly attached to the same frame and forming pockets into which the safety gates are retracted when opened. The supporting frame consists of three identical frame members, each carrying a safety gate and a gate drive in the form of a timing belt loop, as well as safety interlock switches and a safety interlock linkage for the operation of hydraulic and/or mechanical interlock devices. One frame member also carries a die displacement measuring unit.
Claims16
A safety cover assembly enclosing the area of the injection molding die of the die closing unit of a plastic injection molding machine having at least one safety gate which is retractable in the direction of the die opening movements and having a supporting member carrying and guiding the safety gate, including guide means for the safety gate comprising outer guide members (eyes or rollers) and inner guide members in the form of guide rods, as well as safety interlock triggering elements on the safety gate cooperating with electrical and hydraulic safety interlock devices which are arranged solidary with the die closing unit, as part of a system of safety controls for the die closing unit,
- characterized in that
- the supporting member carrying the safety gate (17',17",17'") is in the form of a supporting frame (12) which extends over the die closing unit in a portal-like fashion, being mounted on the machine base (10) and carrying stationary guide members as well as safety interlock devices (33 . . . 39;
- 48 . . . 50;
- 40 . . . 47) for the safety gate.
Dependencies are inferred from the claim text.