Method and tool for injection moulding
AssigneeFlexiject AB
InventorLennart Karlsson
Life of this patent
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Abstract
Method for injection moulding one or more parts using an injection moulding machine and tool including at least one mould cavity, and a feed system comprising at least one gate and at least one runner that is located upstream of the at least one gate. The at least one runner includes at least one moveable wall and the method includes changing at least one cross-sectional dimension of the at least one runner by moving the at least one moveable wall in order achieve at least one of to vary a flow rate of material in the at least one runner, to apply a holding pressure to material in the at least one runner and consequently to the at least one mould cavity, or to compress residue in the at least one runner.
Claims10
An injection moulding tool for performing a method for simultaneously injection moulding two or more parts with a different size, shape and/or volume using an injection moulding machine, the injection moulding tool including two or more mould cavities and a feed system comprising at least one gate and a plurality of runners that is arranged to be located upstream of said at least one gate, wherein said plurality of runners comprises at least one movable wall that is arranged to enable at least one cross-sectional dimension of said plurality of runners to be changed in order achieve at least one of the following:
- a) to apply a holding pressure to material in said plurality of runners and consequently to said two or more mould cavities,
- b) to compress residue in said plurality of runners,
- whereby said tool comprises means to change said at least one cross-sectional dimension of said a plurality of runners, and whereby said at least one cross-sectional dimension of said plurality of runners is individually variable.
Dependencies are inferred from the claim text.