APARELHO PARA AQUECER OBJETOS SEMIMANUFATURADOS, EM FORMA DE PLACAS, DE SUBSTANCIAS TERMOPLASTICAS SINTETICAS
In an apparatus for heating preshapes consisting of a thermoplastic, in particular a fiber-reinforced plastic, the preshape is fed, by a conveyor belt, to a heating apparatus equipped with bright infra-red radiators. To provide time-dependent metering of the thermal energy, the installation possesse...
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Main Authors | , , |
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Format | Patent |
Language | Portuguese |
Published |
08.09.1981
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Edition | 3 |
Subjects | |
Online Access | Get full text |
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Summary: | In an apparatus for heating preshapes consisting of a thermoplastic, in particular a fiber-reinforced plastic, the preshape is fed, by a conveyor belt, to a heating apparatus equipped with bright infra-red radiators. To provide time-dependent metering of the thermal energy, the installation possesses an electronic control unit, equipped with a microprocessor, which unit generates a periodically increasing and decreasing electrical signal voltage, whose time-curve and amplitude can be varied in accordance with the heat uptake capacity of the preshape. The signal voltage additionally controls a feed unit, which in turn feeds to the heating apparatus, by means of a phase control system, a periodic electric current which in its time-curve and amplitude corresponds to the pre-programmed signal voltage. |
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Bibliography: | Application Number: BR19818101103 |