Injection moulding method and system for forming an oven liner as well as oven liner

Abstract

The present invention relates to an injection moulding system for forming an oven liner, particularly of the type that is used with microwave ovens. Oven liners are of particular benefit when used inside microwave ovens. They improve hygiene as where food spills or spurts onto the oven liner rather than an interior of the microwave oven. An injection moulding system for forming an oven liner includes: a first mould tool which defines a cavity of length (L), width (W) and height (H), the first mould tool has a substantially rectangular end face with dimensions corresponding to the width (W) and height (H) of the cavity and has a hot feed located at a centroid of its end face; and a wedge collapsing tool is received in the cavity so as to contact and engage with an external periphery of the first mould tool at selected locations in order to define a volume into which hot material feed is injected, wherein the wedge collapsing tool comprises a first part and a second part in slidable contact one with another, and the width (W2) of the second part exceeds the width (W1) of the first part of the wedge collapsing tool by at least 0.1 mm so that a split line is formed on at least one side of an interior surface of the oven liner.

Dependencies are inferred from the claim text.