PLASTIC PRODUCT INJECTION MOULD AND METHOD OF INJECTION MOULDING Russian patent published in 2009 - IPC B29C45/16 B29C45/33 B29C39/12 B29C33/38 

FIELD: process engineering.

SUBSTANCE: proposed mold is intended for moulding plastic product made up of at least two adjacent parts (15,16) from two plastic materials of different types and/or colors welded- or glued together. Proposed mould comprises forming chamber (1) limited by, at least two irregular walls (3, 4) and, at least, one extending partition (5) to divide mould chamber (2) into at least two compartments (6, 7), plastic material being fed separately into both. Aforesaid partition (5), when extended, comprises nonlinear rib (13) to interact with wall (4) of chamber (2). Aforesaid partition comprises multiple butt-jointed panels (10, 11, 12), either extended or pushed in. These panels can change the shape of nonlinear rib to have it mating the shape of second wall (3) in chamber (2). Proposed injection method comprises moving at least one extending partition (5) of mould (1) to produce at least two moulding compartments, filling at least first compartment (6) with plastic material of first type to be cooled therein. Consecutive motion of panels (10,11,12) of at least one extending partition (5) is displaced in pushed-in position. Now, second compartment (7) is filled with plastic material of second type to be cooled therein. Now the product is taken out of the mould.

EFFECT: mould for producing plastic product consisting of at least two adjoining parts of different plastic materials or colors.

8 cl, 9 dwg