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Hot Runners Four components for injection moulding include an elastomer

Editor: Eric Culp

A range of hot runners designed by Günther Heisskanaltechnik allows a processor to make producing a complicated everyday item look easy.

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A schematic of the hot half of the mould, which features 10 hot runners. It is used to produce remote controls for cars.
A schematic of the hot half of the mould, which features 10 hot runners. It is used to produce remote controls for cars.
(Source: Günther Heisskanaltechnik)

Mould maker and plastic processor Oechsler, Ansbach, Germany, has created a complex tool – with a total of ten hot runner nozzles of varying construction and different runners from Günther – for vehicle remote control housing shells from four materials.

A product that must be simple, durable and reliable

The remote looks unspectacular at first glance but has perform reliably for a car's whole life. Moreover, it must be able to cope with unfavourable environmental conditions and withstand the buttons being pressed thousands of times during the service life of the vehicle, safely and without any mistakes.

Oechsler supplies several versions to the General Motors Group, and the whole housing must be robust in construction, but because it is for the the automotive industry, it has to be produced inexpensively with a high standard of quality, the company said. The main component of the housing consists of black PA66 and PA6T/6I GF50.

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According to Ochsler, this extremely rigid material provides robustness and good mechanical characteristics, which are required for, among other things, the basis for the turning mechanism of the key. The buttons and/or symbols consist of a PA6 GF10. These buttons are coated with a TPU; the membranes created in this way are permanently elastic, provide a pleasant sensation when pressed and seal the whole unit, the supplier said.

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