HIGH FREQUENCY COIL DRAWING HOLE STRUCTURE CAPABLE OF PRODUCING 5 TO 10 SILICON CORES SIMULTANEOUSLY

摘要

A high frequency coil drawing 5 to 10 silicon cores simultaneously. A drawing hole or material melting hole (11) is disposed in a middle portion of a round high frequency coil (2). 4 to 9 drawing holes (5) surrounding the outside of the hole evenly are disposed. Flow guide grooves (12) are disposed radially between the drawing hole or material melting hole (11) and any two drawing holes (5). An outer end head (4) of the flow guide groove (12) is disposed between any two drawing holes. A drainage groove (6) or a V-shaped notch (16) is disposed on one side, facing the drawing hole or material melting hole (11), of the drawing hole (5). A distance is kept between a pointed end of the drainage groove (6) or the V-shaped notch (16) and the drawing hole or material melting hole (11). Outer ends of a water inlet pipeline (8) and a water outlet pipeline (13) are each provided with a connecting seat (9). The drainage groove or the V-shaped notch enables a drawing hole current surrounding the periphery to be distributed around the drawing hole evenly, thereby effectively decreasing the ovality of an obtained columnar crystal.