A method and apparatus for trimming one of an electrically conductive synthetic resin compound existing information traeger - blank

摘要

PURPOSE:To obtain an apparatus which is provided with an extruding means of material for a recording medium, a preforming means, a carrying means, a special press case, a pressing means, an edge shaping means and press-forms the information recording medium which has not strain in an outer peripheral part and has a uniform thickness. CONSTITUTION:Electroconductive resin such as vinylchloride resin mixed with carbon of 5-30% is extruded from an extruding means 1 sufficient for one sheet of recording medium. From obtained forming material a medium part which continues to its final shape at the outside of the final shape of a recording medium is formed by a preforming means of which a plate 13 is provided to slide freely within a cake cup 12. Then, a preformed product is press-formed between upper and lower press cases 49, 48 which are constituted so as to form a overflow part continuing to the medium part and a recording medium having a large outer shape with a overflow is obtained, it is put on a turntable and edge shaping is performed by an edge shaping mechanism.