Moulding plastic articles

Abstract

Abstract The specification discloses a method of making an aperturedefining frame member e.g. a window frame, comprising a rigid, frame-shaped reinforcement embedded in synthetic resinuous material. The method comprises placing the reinforcement in a mould cavity having the shape of the required frame member, at least partly locating the reinforcement in the cavity by engaging the reinforcement between a plurality of pairs of pin-like projections, the projections of each pair extending from the cavity walls in opposite directions and being located directly opposite to one another, filling the mould cavity with synthetic resinuous material to embed the reinforcement therein while the reinforcement is located in the cavity by the projections, subsequently opening the cavity and withdrawing the projections from the completed frame member after moulding of the member is complete thus to leave bores in the material at the positions occupied by the projections during moulding, providing an aperture through the reinforcement in alignment with the bores left by at least one pair of projections and fixing a bushing to extend through said bores and said aperture, the bushing being in sealing engagement with said bores. The bushing may be used to receive a fastener to secure the frame member to another member and the bushing may be in two parts, a first part having a hollow shank with a collar at one end thereof and a second part arranged to engage the end of the shank remote from the collar.

Inventors

• 👤 H Sharp
• 👤 V Humphrey

Bibliographic Details