Method for the production of plates made of plastic material with parts overmoulded by injection compression

A process for the production of plates with overmoulded parts, the process comprising:

• moulding a plate using a transparent material by injection compression in a mould in a first moulding station utilizing a set of first injectors located in the first moulding station and aligned relative to each other along a periphery of the mould corresponding to only one side of a peripheral area of the plate, the set of first injectors being plugged and where the injection compression starts at the end of an injection step through the first set of injectors and where visible witness marks are created by the plugged set of first injectors;
• transferring the mould to a second moulding station;
• overmoulding parts on said plate using a non-transparent material to create a frame on the peripheral area of the plate in the mould in the second moulding station utilizing a set of second injectors located in the second moulding station and aligned relative to each other along the periphery of the mould corresponding to the frame of the peripheral area of the plate, the set of second injectors comprising at least two injectors located on a side of the frame of the peripheral area of the plate and at least two injectors located on an opposite side of the frame of the peripheral area of the plate, wherein the non-transparent material covers the witness marks from the set of first injectors of the first moulding station.