Mold and method for sequentially injecting plastics material to form an automotive vehicle body part
AssigneeCompagnie Plastic Omnium
InventorBernard Martinez
Life of this patent
Estimating the term…
Abstract
The invention relates to a method of producing an automotive vehicle body part (1) by injecting a plastics material sequentially into a mold fed by one or more cold runners, the method consisting in filling firstly a first region (A) at one end of the mold, then a second region (B) adjacent to the first region, and repeating the operation consisting in filling a new region adjacent to the preceding region each time, until a last region (C) of the mold is reached at its end opposite from the first region (A). Each cold runner is shut off using a cold rod which is axially movable in a bore intersecting the cold runner, the longitudinal section of the rod overlaying the cross section of the runner.
Claims13
A method of producing an automotive vehicle body part by injecting a plastics material sequentially into a cavity of a mold fed by cold runners, the method comprising filling firstly a first region at one end of the mold, then a second region adjacent to the first region, and repeating the operation comprising filling a new region adjacent to the preceding region each time, until a last region of the mold is reached at its end opposite from the first region, wherein each cold runner is shut off using a cold rod which is axially movable in a bore intersecting the cold runner, the longitudinal section of the rod overlaying the cross section of the runner.
A method of injecting plastics material sequentially into a mold fed by cold runners, to produce an automotive vehicle body part, the method comprising:
- providing the mold with bores intersecting the cold runners and with axially movable cold rods in said bores, the longitudinal section of each rod overlaying the cross section of the corresponding runner;
- shutting off the cold runners using the rods at the start of injection;
- and
- opening the cold runners individually by displacing the rods in the bores.
An injection mold for carrying out a method of injecting plastics material sequentially into a mold fed by cold runners, to produce an automotive vehicle body part, the method including providing the mold with bores intersecting the cold runners and with axially movable cold rods in said bores, the longitudinal section of each rod overlaying the cross section of the corresponding runners, shutting off the cold runners using the rods at the start of injection, and opening the cold runners individually by displacing the rods in the bores, the mold comprising:
- a rod, as a shut-off for a cold runner, said rod having a longitudinal section which overlays the cross section of the cold runner, the rod being axially movable in a bore intersecting the cold runner between a shut off position in which the rod traverses the cold runner and an open position in which the rod is retracted from the cold runner and leaves the cross section of the cold runner open.
Dependencies are inferred from the claim text.