Injection molding process to form a box for bottles, bottle case and corresponding apparatus for said bottle case

摘要

Procedure injection molding to form at least partially a bottle case (20, 35) with molten plastic material which includes additive elements, comprising the step of injecting into a mold (3, 43) through at least one injection nozzle (6, 7; 59) said molten plastic to form at least partially a panel (2; 21, 22; 36, 37) of said bottle case, wherein the molten plastic extends into two opposite flows (4, 4 ', 4 ", ...; 5, 5', 5") towards each other until at least one region of visible joint (10, 11; 53, 54) to provide initial contact layer ( 12, 13) cast in a ratio of front wave plastic when said opposing flows meet one another, characterized by further comprising the step of channeling the flows at one end (14, 15) of said connecting zone to a conduit external overflow (16, 17; 55, 56) outside the visible area of ​​union, and filling said overflow pipe with the molten plastic of said layer of initial contact, to eliminate lines dark flow in said attachment zone, being displaced the layer initial contact of the two flows the overflow pipe located in a cover or hide the box area, and / or forming an excess portion (23, 24, 25, 26) after curing removed, the remaining part is formed in a cavity (57, 61) comprising a reservoir (18, 19) of a predetermined volume included in the mold in the vicinity of said connecting zone and connected to said connecting zone to form said conduit and said housing comprises a bottom wall and side walls, said side walls are covered at least partially by an external overmolded cladding (39 ) formed by the two opposing flows (4, 4 ', 4 ", 5, 5', 5") of said molten plastic material.