A molding device for producing a molded module. The molding device has one tool part and one further tool part, which together enclose a cavity. At least one of the tool parts has at least one dividing web arranged and configured to subdivide the cavity into at least a low-pressure sub-cavity and a high-pressure sub-cavity. The tool part has at least two feed channels, of which a low-pressure feed channel opens into the low-pressure sub-cavity and has a smaller cross-section at least over a longitudinal portion than a high-pressure feed channel opening into the high-pressure sub-cavity. The low-pressure feed channel is configured to become pressure-resistantly blocked through hardening of the molding compound once a predetermined time interval has elapsed or during the interval. The high-pressure feed channel is configured to conduct a molding pressure into the cavity for a longer time interval than the low-pressure feed channel.

An injection molding tool configured for being mounted in an injection molding apparatus for automated molding of work pieces in plastics, said injection molding tool comprising at least one main runner channel extending between the sprue channel and a runner branch where it branches into two or more branched runner channels leading to the mold cavities, and where at least the main runner channel downstream from the sprue channel comprises two flow channels being mutually joined at a runner junction downstream from the sprue channel, and wherein the two flow channels until the runner junction are linear and extending parallel to each other, and being completely or partly separated by a linear separating wall.

An injection-molding tool has at least two separate mold parts forming a set of mold cavities, and a set of runner channels extending between the mold inlet and leading melt flow to the mold cavities. The set of runner channels comprises a number of junctions, each junction dividing a downstream end of a primary runner channel extending upstream from the junction into two or more separate secondary runner channels extending downstream from the junction. A stretch of the downstream end of the primary runner has a cross section area being smaller than the cross section area of the primary runner further upstream from the junction.

Method for injection moulding one or more parts using an injection moulding machine and tool (12, 13) comprising at least one mould cavity (17), and a feed system comprising at least one gate (18) and at least one runner (19, 20, 21) that is located upstream of the at least one gate (18). The at least one runner (19, 20, 21) comprises a at least one moveable wall and the method comprises the step of changing at least one cross-sectional dimension (T, B, H, S or S+ΔS) of the at least one runner (19, 20, 21) by moving the at least one moveable wall in order achieve at least one of the following: a) to vary a flow rate of material in the at least one runner (19, 20, 21), b) to apply a holding pressure to material in the at least one runner (19, 20, 21) and consequently to the at least one mould cavity (17), c) to compress residue in the at least one runner (19, 20, 21).

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.

Method for injection moulding one or more parts using an injection moulding machine and tool (12, 13) comprising at least one mould cavity (17), and a feed system comprising at least one gate (18) and at least one runner (19, 20, 21) that is located upstream of the at least one gate (18). The at least one runner (19, 20, 21) comprises a at least one moveable wall and the method comprises the step of changing at least one cross-sectional dimension (T, B, H, S or S+S) of the at least one runner (19, 20, 21) by moving the at least one moveable wall in order achieve at least one of the following: a) to vary a flow rate of material in the at least one runner (19, 20, 21), b) to apply a holding pressure to material in the at least one runner (19, 20, 21) and consequently to the at least one mould cavity (17), c) to compress residue in the at least one runner (19, 20, 21).

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.

Methods and systems for co-extruding multiple polymeric material flow streams into a mold having a plurality of cavities to produce a plurality of multi-layer polymeric articles each having a consistent coverage of an interior core layer are disclosed herein. In an example method, a flow rate of a first skin material into a cavity is individually controlled for each cavity before initiation of co-injection of a second core material into the cavity, which may address inconsistent interior core layer coverage for articles from different cavities.

A device for injection-molding and for overmolding objects has an upper element and a lower element, which surround a contiguous volume consisting of a filling space for holding the object and casting material and a sprue for holding casting material. The upper element is movable in relation to the lower element. A piston is arranged within the upper element in an integrated manner and is movable relative to the upper element. The position of the piston can be varied in accordance with a dimension of the object in an axial direction and the piston has a protrusion for changing a volume as filling amount balancing of the casting material within the sprue such that the device is filled with a constant amount of casting material irrespective of the dimension of the object in the axial direction and a volume varying with the dimension of the object in the axial direction.

Methods and systems for co-extruding multiple polymeric material flow streams into a mold having a plurality of cavities to produce a plurality of multi-layer polymeric articles each having a consistent coverage of an interior core layer are disclosed herein. In an example method, a flow rate of a first skin material into a cavity is individually controlled for each cavity before initiation of co-injection of a second core material into the cavity, which may address inconsistent interior core layer coverage for articles from different cavities.