Disclosed herein is an injection mold for production of marbled moldings, including at least one hot runner, a cavity, an entry opening into the injection mold and an inlet into the cavity, where the hot runner has at least two ducts that are connected at a first end of each duct to the inlet into the cavity and at a second end of each duct to the entry opening into the injection mold, where the at least two ducts each at least partly form a spiral, and the at least two ducts are bounded by a one-piece component. Further disclosed herein is a process for producing the injection mold and a process for producing marbled moldings.

Disclosed herein is a process for producing marbled moldings, where a first molding compound and at least one further molding compound are injected from an injection unit of a screw injection molding machine into an injection mold, where the injection unit includes a barrel, a screw having a screw tip and a nozzle where the screw is rotatable and is disposed in the barrel so as to be movable between a forward position and a backward position, with a smaller distance between the screw tip and the nozzle in the forward position than in the backward position, and where the first molding compound includes a first polymer compound and a first colorant, and the at least one further molding compound includes a further polymer compound and optionally at least one further colorant. Further disclosed herein is an apparatus for production of marbled moldings, and a process for producing the apparatus.

Disclosed herein is a process for producing marbled moldings, where a first molding compound and at least one further molding compound are injected from an injection unit of a screw injection molding machine into an injection mold, where the injection unit includes a barrel, a screw having a screw tip and a nozzle where the screw is rotatable and is disposed in the barrel so as to be movable between a forward position and a backward position, with a smaller distance between the screw tip and the nozzle in the forward position than in the backward position, and where the first molding compound includes a first polymer compound and a first colorant, and the at least one further molding compound includes a further polymer compound and optionally at least one further colorant. Further disclosed herein is an apparatus for production of marbled moldings, and a process for producing the apparatus.

A runner turn-off for a mold. The runner turn-off includes a bottom ring and a top ring rotatable on the bottom ring. The runner turn-off has a generally cylindrical shape to allow for the rotation, and includes a machining flat on each of two opposing sides of the bottom ring and partially extending into the top ring. A plurality of detents is disposed in one of a bottom surface of the top ring or a top surface of the bottom ring. A spring plunger between the top ring and the bottom ring and configured to fit within each of the plurality of detents when aligned to provide more precise angular positioning.

A runner turn-off for a mold. The runner turn-off includes a bottom ring and a top ring rotatable on the bottom ring. The runner turn-off has a generally cylindrical shape to allow for the rotation, and includes a machining flat on each of two opposing sides of the bottom ring and partially extending into the top ring. A plurality of detents is disposed in one of a bottom surface of the top ring or a top surface of the bottom ring. A spring plunger between the top ring and the bottom ring and configured to fit within each of the plurality of detents when aligned to provide more precise angular positioning.

A component (100, 100) of a molding apparatus (110, 110) for producing hollow plastic items, in particular test tubes, syringes or tubular bodies, the component (100, 100) comprising: a first body (1,1) having a face (11) defining part of a separation surface of the molding apparatus (110, 110); a second body (2, 2), or stripper ring, inserted in the first body (1, 1), adapted to be crossed along an axis (X) by a core (3), and in particular to come into contact with the core (3); a plurality of elements (4, 4) inserted in the first body (1, 1), adapted to be displaced parallel to the axis (X); in which the second body (2, 2) has an outer surface (20) comprising a plurality of inclined portions (21, 21), in particular with respect to said axis (X); and in which each element (4, 4) of said plurality of elements (4, 4) has an outer surface comprising an inclined portion (41, 41), in particular with respect to said axis (X), which is in contact with a respective inclined portion (21, 21) of the second body (2, 2) so that the position of the second body (2, 2) can be adjusted by means of said plurality of elements (4, 4).

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

An actuator system for an injection molding system includes a double acting pressurized fluid actuator having a piston drive movable in a cylinder space, a flow control valve for regulating a flow rate of pressurized fluid to and/or from the cylinder space, a flow sensor for detecting the flow rate of pressurized fluid to and/or from the cylinder space, and an electronic controller for controlling the flow control valve to regulate the flow rate of pressurized fluid to and/or from the cylinder space depending on the flow rate detected by the flow sensor.

A runner turn-off for a mold. The runner turn-off includes a bottom ring and a top ring rotatable on the bottom ring. The runner turn-off has a generally cylindrical shape to allow for the rotation, and includes a machining flat on each of two opposing sides of the bottom ring and partially extending into the top ring. A plurality of detents is disposed in one of a bottom surface of the top ring or a top surface of the bottom ring. A spring plunger between the top ring and the bottom ring and configured to fit within each of the plurality of detents when aligned to provide more precise angular positioning.

A runner turn-off for a mold. The runner turn-off includes a bottom ring and a top ring rotatable on the bottom ring. The runner turn-off has a generally cylindrical shape to allow for the rotation, and includes a machining flat on each of two opposing sides of the bottom ring and partially extending into the top ring. A plurality of detents is disposed in one of a bottom surface of the top ring or a top surface of the bottom ring. A spring plunger between the top ring and the bottom ring and configured to fit within each of the plurality of detents when aligned to provide more precise angular positioning.