Abstract: Described herein is a process and apparatus for the production of an article made of moulded plastic material with a first component and at least one second component overmoulded on the first component, in which, in the second injection step for overmoulding the second component, the moulding cavity is at least in part delimited by at least one resting surface that is independent of and mobile with respect to the mobile surface of mould and is set in contact with the first component.

Abstract: An injector for injection moulding of plastic materials incorporates a vacuum device for creating a suction pressure within the mould in an area corresponding to the injection point, prior to the injection of the plastic material.

Abstract: An injector for injection-moulding of plastic materials including a generally cylindrical body, wound on the outside of which are at least two pairs of mutually independent electrical heating resistors and associated to which are respective control thermocouples.

Abstract: The identification and location of possible faults of operation and/or installation of a hot runner are obtained through the measurement of the absorption of power by the heating resistors applied to the arms and to the injectors of the hot runner. The qualitative and quantitative analysis of the power absorbed by the resistors also enables identification of the type of possible faults and the corresponding seriousness.

Abstract: A method of injection molding lens bodies of transparent or semitransparent plastic material for producing car lights and similar; the lens body being defined by a convex shell made of transparent or semitransparent plastic material, and which has a concave face eventually facing the light source of the light, and a convex face eventually forming part of the outer surface of the light, and is divided into at least a first and a second monochromatic portion; the molding method forming, in succession, a first half-shell of plastic material substantially reproducing the shape of the whole shell, and, directly on the concave surface of the first half-shell, a second half-shell of plastic material only reproducing the shape of the second monochromatic portion of the shell; in both cases, the plastic material being injected into the mold through one or more injection points located at the concave face of the shell, inside the perimeter of the second monochromatic portion, which is bounded by an at least partly corr

Abstract: The identification and location of possible faults of operation and/or installation of a hot runner are obtained through the measurement of the absorption of power by the heating resistors applied to the arms and to the injectors of the hot runner. The qualitative and quantitative analysis of the power absorbed by the resistors also enables identification of the type of possible faults and the corresponding seriousness.

Abstract: An injector for equipment for injection moulding of plastic materials comprising at least one first heating resistor and at least one second heating resistor, which are controlled independently of one another and of which one is wound on a first area of the body of the injector extending substantially throughout the axial extension thereof and the other is wound on a second area that extends only along an axial portion of the body of the injector starting from a substantially intermediate area thereof.

Abstract: Described herein is a thermoregulation sistem for heated components (N) of apparatus for injection moulding of plastic materials, equipped with a first heating resistor (R1) and a second heating resistor (R2) with respective thermocouples (TC1, TC2) associated thereto, comprising an electronic control unit (C) for controlling the fail-safe electric supply of the two resistors (R1, R2) according to signals coming from the respective thermocouples (TC1, TC2). The two resistors (R1, R2) are connected independently to the control unit (C), to which the thermocouples (TC1, TC2) are also independently connected.

Abstract: Described herein is a process and apparatus for the production of an article made of moulded plastic material with a first component and at least one second component overmoulded on the first component, in which, in the second injection step for overmoulding the second component, the moulding cavity is at least in part delimited by at least one resting surface that is independent of and mobile with respect to the mobile surface of mould and is set in contact with the first component.

Abstract: Described herein is a process and apparatus for the production of an article made of moulded plastic material including a first component formed in a first injection step and possible compression step, and at least one second component overmoulded on said first component in a second injection step and possible compression step. The moulding is carried out in a single station defined by a mould and a countermould and, prior to forming the first component, recesses for formation of elements of attachment and/or reinforcement integrally with the second component are closed or modified.

Abstract: The identification and location of possible faults of operation and/or installation of a hot runner are obtained through the measurement of the absorption of power by the heating resistors applied to the arms and to the injectors of the hot runner. The qualitative and quantitative analysis of the power absorbed by the resistors also enables identification of the type of possible faults and the corresponding seriousness.

Abstract: An injector for equipment for injection moulding of plastic materials comprising at least one first heating resistor and at least one second heating resistor, which are controlled independently of one another and of which one is wound on a first area of the body of the injector extending substantially throughout the axial extension thereof and the other is wound on a second area that extends only along an axial portion of the body of the injector starting from a substantially intermediate area thereof.

Abstract: A flow component (5) for systems for injection moulding of plastic materials having a flow passage (10) with an inlet (11) and an outlet (12), which together form an elbow (13), which has an internal projection (16) facing the inlet (11) and delimiting two areas (17) of doubling of the flow located immediately downstream of a guide passage (14) for a valve stem (8).

Abstract: An injector for equipment for injection moulding of plastic materials the cylindrical body of which has a distal axial portion of larger diameter, a proximal axial portion of smaller diameter, and an intermediate adapting portion shaped like a truncated cone made of a single piece with the distal and proximal portions. An electrical heating resistor extends without any interruption within a helical groove of the body of the injector.