A method for manufacturing of injection moulds for plastic pyramidal packagings with a label area and an injection mould for plastic pyramidal packagings with a label area

摘要

A method for manufacturing of injection moulds for plastic pyramidal packagings with a label area and with lenticular lens, in which a two-part mould is prepared, wherein the first part of the mould has a socket shaped correspondingly to the outer surface of the packaging wall and contains grooves corresponding to the inverse shape of the lenticular lens and a planar label area, and wherein the second part of the mould has a piston shaped correspondingly to the inner surface of the packaging wall and is intended to receive a label comprising a print with a lenticular image compatible with the grooves of the socket of the first part of the mould and with a label image. In the first part of the mould (210) a socket (212) is made in a shape of a truncated pyramid and a metal sheet (230) is cut to the shape of a geometrical development of the side walls of the truncated pyramid corresponding to the socket (212), wherein in the metal sheet (230) grooves (213) are made which are corresponding to the inverse shape of the lenticular lens (110) and positioned within each wall in parallel to each other and perpendicularly to the geometrical base of the particular side wall, wherein on at least one wall of the metal sheet (230) an area is left which is free of grooves (213) and corresponds to the label area (130), and next the cut metal sheet (230) with the grooves (213) is attached to the side walls of the socket (212) such that the grooved side (213) is faces the inside of the socket (212).