| 摘要 |
AN INTERNAL UNDERCUT CORE (7) TO OVERCOME THE DIFFICULTIES IN INJECTION MOULDING AN ARTICLE (8) OF A DESIGN HAVING AN INTERNAL CIRCUMFERENTIAL UNDERCUT THAT EXTENDS UP TO 360 DEGREES. THE INTERNAL UNDERCUT CORE (7) COMPRISES A PLURALITY OF SECTIONS (7A, 7B) AND WITH SAID INTERNAL UNDERCUT CORE (7) ABLE TO FORM, SPLIT AND REFORM TO SUIT THE DIFFERENT REQUIREMENTS OF EACH INJECTION MOULDING CYCLE AND WITH A CONTROL MEANS PROVIDED TO CONTROL THE FORMING, SPLITTING AND REFORMING OF SAID INTERNAL UNDERCUT CORE (7). THE INTERNAL UNDERCUT CORE (7) FORMS PART OF COMPONENTS OR IS ATTACHED TO SAID COMPONENTS OF AN INTERMEDIATE PLATE ASSEMBLY (33) WITH SAID INTERMEDIATE PLATE ASSEMBLY (33) USED IN CONJUNCTION, AMONG OTHERS, A CAVITY MOULD (15) AND A CORE MOULD (18) OF A MOULD ASSEMBLY (1) FOR INJECTION MOULDING OF THE ARTICLE (8). |
