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    • 2. 发明授权
    • Electrical heating element for heating a plate and process for the
production thereof
    • 用于加热板的电加热元件及其制造方法
    • US4471214A
    • 1984-09-11
    • US398556
    • 1982-07-15
    • Gerhard G/o/ sslerEugen WildeBernhard Mikschl
    • Gerhard G/o/ sslerEugen WildeBernhard Mikschl
    • H05B3/76F24C15/10H05B3/06H05B3/68H05B3/74
    • H05B3/748H05B2203/017
    • An electrical heating element (18) for heating a plate, e.g. a glass ceramic plate (14) has a multilayer insulating support (12) in whose dish-shaped depression heater coils (18) are arranged in spiral form. The heater coils are located on the insulating support surface (17) and have downwardly directed deformations (19) comprising a turn pressed out in the downwards direction. These deformations (19) are embedded in the surface layer (16) of the insulating support, which is mechanically stronger and more thermally conductive than the underlying insulating layer (15). The deformations are produced in a mould (22, 23) carrying the heater coils in slots (21) and by means of a bladelike punch (24) a turn is pressed into a depression (25). The connection between heater coil (18) and insulating support (12) during the moulding thereof comprises a loose insulating material, the heater coil and deformations being placed in slots (27) of mould part (26).
    • 一种用于加热板的电加热元件(18),例如 玻璃陶瓷板(14)具有多层绝缘支撑件(12),其碟形凹陷加热器线圈(18)以螺旋形式布置。 加热器线圈位于绝缘支撑表面(17)上并且具有向下定向的变形(19),包括沿向下方向压出的转弯。 这些变形(19)嵌入在绝缘支撑体的表面层(16)中,该表面层(16)比下面的绝缘层(15)机械地更强并且更加导热。 在模具(22,23)中,在槽(21)中承载加热器线圈并且通过平板冲头(24)将转弯压入凹部(25)中来产生变形。 加热器线圈(18)和绝缘支撑件(12)在其模制期间的连接包括松散的绝缘材料,加热器线圈和变形被放置在模具部件(26)的槽(27)中。