Abstract:
The invention relates to a multi-component injection moulding method for producing a sleeve-shaped preform as well as to a perform which has at least two layers, said method comprising at least two process steps including at least two cavities and at least one injection mould core that can be used for both cavities, and wherein during the first process step, the first layer which has at least one first and at least one second area extending partially in the circumferential direction of the preform, is injected onto the injection mould core within the first cavity, with the second area having a substantially lower layer thickness than the first area, and during the second process step, the second layer is deposited on the first layer which is located on the injection mould core in the second cavity in such a way that only the second area of the first layer is completely covered by the second layer, or during the first process step, the first area of the first layer is deposited partially on the injection mould core within the first cavity, with the remaining areas being covered by the second layer during a second process step within a second cavity.
Abstract:
The invention relates to a multi-component injection molding method for producing a sleeve-shaped preform as well as to a perform which has at least two layers, said method comprising at least two process steps including at least two cavities and at least one injection mold core that can be used for both cavities, and wherein during the first process step, the first layer which has at least one first and at least one second area extending partially in the circumferential direction of the preform, is injected onto the injection mold core within the first cavity, with the second area having a substantially lower layer thickness than the first area, and during the second process step, the second layer is deposited on the first layer which is located on the injection mold core in the second cavity in such a way that only the second area of the first layer is completely covered by the second layer, or during the first process step, the first area of the first layer is deposited partially on the injection mold core within the first cavity, with the remaining areas being covered by the second layer during a second process step within a second cavity.
Abstract:
A housing includes a housing section made of hard thermoplastic material for a circuit, e.g. a motor vehicle locking system, to be protected from harmful substances, and at least one pressure member being made of soft thermoplastic material and being accessible from outside the housing. Each pressure member serves to operate at least one electric switch being disposed or to be disposed inside the housing. Edges of the pressure member provide an all-round watertight and adhesive-free cover for a hole in the housing section, with the edges being injection molded directly onto the synthetic material of the housing section in such a way that the synthetic material of the pressure member and the synthetic material of the housing section are fused together.
Abstract:
An inductive measurement transducer for determining a position of a moving body, comprising: a conductor loop over the moving body; a stationary conductor loop which extends over a measurement length and is fixed with respect to the moving body; an inductively acting element mounted to the moving body to produce an alternating magnetic field which extends essentially at right angles to the conductor loop over the moving body so that the alternating field passes through the stationary conductor loop, a voltage difference between a forward line and a return line of the stationary conductor loop being averaged and passed to an output so that voltage elements can be tapped off by individual taps which are distributed over the measurement length on the conductor loop; and one of individual resistors and individual capacitors operatively arranged to carry out the averaging, the one of individual resistors and individual capacitors being connected to a common connection which encloses the region through which the alternating magnetic field of the moving, inductively acting element can flow.