LEGO A/S

An injection molding tool comprising two mold parts arranged for mutual movement along a tool axis between a closed position and an open position. The injection molding tool comprises a first mold core having a mounting end and a core end. Each of the two mold parts, in the closed position, form a mold cavity and a socket adapted for holding the mounting end between the two mold parts, and for releasing the mounting end in the open position. The core end of the first mold core in the closed position, extends along a core axis from the mounting end and into the mold cavity in a transverse direction with respect to the direction of the tool axis, so that the mold cavity forms a tubular space extending axially along the core axis between both of the two mold parts and the core end of the mold core part.

An injection-molding tool comprising at least two separate mold plates each having a mold insert socket with a mold insert attached in the mold insert socket. Each mold plate have mutually opposite and parallel abutting side faces defining the thickness of the mold plate and a number of mutually aligned guide bushings forming through holes adapted for axially sliding one of the mold plates with respect to the other on a common guide pin in a direction perpendicular to the abutting side faces of the mold plates. The guide bushings and the mold insert socket of at least one mold plate am interconnected via one or more connection plates each extending parallel to the abutting side faces and having a thickness of less than half the thickness of the mold plate.

An injection-molding tool comprising at least two separate mold parts arranged so that they can be moved along a central tool axis between a closed and an open position. At least one of the mold parts comprises an alignment compensator with a first and a second compensator part. The first compensator part has a socket adapted for receiving the second compensator part so that it can slide along the central tool axis in the socket, and for allowing the second compensator part to tilt in the socket. A seal is arranged so that the seal and the first and the second compensator part encloses a space in the socket containing an elastic or fluid material. The seal also comprises a lid made from a plastic material arranged between the second compensator part and the liquid filled space in the socket.

A method for controlling an injection molding machine comprising a reciprocating plasticizing screw and a controller system adapted for measuring or calculating at least one first production parameter and for controlling/setting at least one second production parameter on the injection molding machine. The method comprises setting a preselected target value for the first production parameter, and inputting the target value into the controller system. The method comprises comparing the measured first production parameter of one production cycle with the preselected target value for the first production parameter. The method comprises calculating by the controller system a new value for the second production parameter as a function of the difference between the first production parameter and the preselected target value for the selected actual production parameter. The method comprises setting by the controller system said new value for the second production parameter for a subsequent production cycle.

An injection-molding tool comprising at least two separate mold plates each having a mold insert socket with a mold insert attached in the mold insert socket. Each mold plate have mutually opposite and parallel abutting side faces defining the thickness of the mold plate and a number of mutually aligned guide bushings forming through holes adapted for axially sliding one of the mold plates with respect to the other on a common guide pin in a direction perpendicular to the abutting side faces of the mold plates. The guide bushings and the mold insert socket of at least one mold plate am interconnected via one or more connection plates each extending parallel to the abutting side faces and having a thickness of less than half the thickness of the mold plate.

An injection molding tool comprising two mold parts arranged for mutual movement along a tool axis between a closed position and an open position. The injection molding tool comprises a first mold core having a mounting end and a core end. Each of the two mold parts, in the closed position, form a mold cavity and a socket adapted for holding the mounting end between the two mold parts, and for releasing the mounting end in the open position. The core end of the first mold core in the closed position, extends along a core axis from the mounting end and into the mold cavity in a transverse direction with respect to the direction of the tool axis, so that the mold cavity forms a tubular space extending axially along the core axis between both of the two mold parts and the core end of the mold core part.

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.

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.