Patent ID: 7641843

Claim:
Method for producing a decorative ornamental part, having a symbol ( 32 ) in relief that is defined by a clearance gap ( 34 ) free as far as possible of webs and connections in a frame ( 31 ) of a control key ( 30 ), wherein the decorative ornamental part is back-injected with a plastic melt ( 29 ) by a plastic injection moulding process, comprising: a cutting operation to produce the clearance gap ( 34 ) within the frame ( 31 ), a stamping punch ( 16 ) carrying out a cutting operation remains within the frame ( 31 ) as a place-holder in the clearance gap ( 34 ) during the injection moulding, and the injection moulding is carried out to produce a bond enabling the exact connection of the cut free inner part ( 33 ) to the frame ( 31 ) of the ornamental part, wherein during said injecting moulding, through the degree of filing of the mould cavity ( 25 ) or control of holding pressure of the plastic melt ( 29 ), the degree of filing of the clearance gap ( 34 ) is over filled to a distinctly palpable degree; characterised in that in a first work step the decorative ornamental part to be back-injected is punched and optionally formed in a mould ( 1 , 20 ) from a visible side ( 13 ) and in doing so punching waste ( 24 ) is pushed into an upper half ( 1 ) of the mould, that in a second work step the stamping punch ( 16 ) is locked in an extended position passing through the frame ( 31 ) and a mould lower part with an inner part fixed by the stamping punch is moved under the upper half of the mould, that in a third work step a plastic melt ( 29 ) is injected into the mould cavity ( 25 ) and the cut free inner part ( 33 ) is connected to the reverse side of the frame ( 31 ) by the plastic melt ( 29 ), and that in a fourth work step after the mould cavity ( 25 ) has been filled with plastic melt ( 29 ) the stamping punch ( 16 ) is unlocked, pulled back to a defined extent and a space liberated comprising the clearance gap ( 34 ) is likewise filled with plastic melt ( 29 ).