Abstract: A plastics injection molding machine having a mold comprising at least two metal shells which are brought into contact with each other and are designed to form a closed cavity negatively reproducing the shape of the plastic part for molding, and a plastic material feed line which is supplied with and liquefies a stream of granular plastic material, and which feeds the liquid plastic material in controlled manner to the cavity formed when the two metal shells are mated; the machine also having a detergent mixture feed circuit which, on command, feeds a given quantity of a detergent mixture into the plastic material feed line, and an electronic central control unit for controlling the detergent mixture feed circuit.

Abstract: A control system for monitoring plastics injection molding machines having a multiwire electric cable connecting the electronic central control unit of the machine to both the electric power unit of the machine and to the thermocouples arranged on the liquid-plastic injection device of the machine. The control system having a data processing unit, which is completely separate from and independent of the electronic central control unit of the machine, and processes the signals travelling along the multiwire electric cable of at least one plastics injection molding machine to determine any malfunctioning of the machine; and at least one data acquisition device connected to the multiwire electric cable to intercept the signals travelling along the multiwire electric cable, and to send copies of them directly to the data processing unit without interfering in any way with operation of the electronic central control unit of the machine.

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: Described herein is an injector for equipment for injection moulding of plastic materials, in which the open/close end of the plug and the corresponding axial passage of the nozzle tip have each an oblong shape in cross section.

Abstract: A method for producing components for injection moulding comprising a body made of thermally conducting material with expansion coefficient matching that of the insulating layers and provided with a passage for the material to be injected. At least one strip of electrically conducting material with high change of resistance with temperature, forming a heating resistor or inductor is applied on a electrically insulating base layer previously directly applied on the body. At least one final insulating layer with low thermal emissivity is then applied to optimise electrical efficiency. The method utilises thermal spray techniques and can be applied also for production of other heating equipment.

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.