EXTRUSION MOLDING EQUIPMENT FOR HIGH POLYMER SHEET

摘要

PURPOSE:To enable a prolonged operation while controlling the width-wise thickness evenly by providing a plurality of heat transfer bodies, heating elements and radiating elements at points along the length of at least one of a pair of lip blocks forming a sheet-shaped matter molding slit section. CONSTITUTION:A melt of a high polymer is put into a cap body 1 as shown by the arrow A and expanded along the width of the cap at a manifold 2. Then, it is discharged in the from of a melt film or plate in the direction of the arrow B from the slit section 3. On the othe hand, the right lip block 11 is equipped with a number of heaters 4 along the length of the cap. The heaters 4 are each made up of a heat transfer body 40 provided with a part thereof inserted into the lip block 11 while the other part thereof is projected thereoutside, a heating element 41 provided with a part thereof at a portion of the heat transfer body 40 positioned in the lip block 11 and a discharging element 42 provided at a portion of the heat transfer body 40 positioned outside the lip block 11. This eliminates disturbance of the atmosphere near the exhaust section as accompanied by cooling thereby producing an evenly thick sheet-shaped matter without any new uneven thickness.