| 摘要 |
Extrusion apparatus comprising a wheel having a circumferential groove around its outer edge. A fixed shoe member bearing against the edge of the wheel has a die member projecting into the circumferential groove. Material to be extruded is fed into the circumferential groove below the shoe member. The wheel is rotated relative to the shoe member so that the material is carried along the circumferential groove by frictional drag towards the die member and is extruded through an orifice in the die member. Conventiently the wheel is formed from three abutting discs, the center disc having a diameter less than that of the two outer discs whereby to form the circumferential groove.
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