Inductively operated heating apparatus for plastic materials
First Claim
1. An inductively operated heating apparatus for plastic materials and the like, comprising a heat-transmitting housing having at least one passage for the material to be heated;
- and means for heating said housing including at least one laminated iron core which is magnetically coupled to said housing, said at least one core defining an open magnetic circuit and said circuit being completed by said housing, at least one coil surrounding at least a portion of said at least one core, and at least one fluid-cooled thermally conductive barrier which carries said at least one coil and is disposed between said at least one core and said at least one coil.
1 Assignment
0 Petitions
Accused Products
Abstract
An inductively operated apparatus for heating plastic materials in extruders or for other purposes has a heat-transmitting housing with one or more passages for the material or materials to be heated, and an arrangement for heating the housing. The heating arrangement employs a laminated core with two legs which are magnetically coupled to the housing with the interposition of distancing elements of heat insulating material. The core is surrounded by an exciting coil. In order to prevent overheating of the coil, the heating arrangement further comprises at least one barrier which is interposed between the core and the core and is cooled by one or more streams of a gaseous or liquid coolant, such as water. The barrier can be constituted by a flat tube which is convoluted around the core and supports the coil. A second barrier can be placed around the coil so that the latter is received between two barriers. Alternatively, the barrier can employ a vessel which confines the coil, and a fluid-conveying conduit which draws heat from the vessel.
33 Citations
16 Claims
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1. An inductively operated heating apparatus for plastic materials and the like, comprising a heat-transmitting housing having at least one passage for the material to be heated;
- and means for heating said housing including at least one laminated iron core which is magnetically coupled to said housing, said at least one core defining an open magnetic circuit and said circuit being completed by said housing, at least one coil surrounding at least a portion of said at least one core, and at least one fluid-cooled thermally conductive barrier which carries said at least one coil and is disposed between said at least one core and said at least one coil.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
Specification