cemented carbide rods with double helix hole carbide helix rod manufacturing technology key is the helix hole formed, it mainly made by a metal powder injection molding technology. 

The process is: the mixture of metal powder and wax injection molding, and then paraffin is removed by sintering to obtain a high density tungsten carbide helix hole rods. Metal injection molding process as follows: mixing→glue→injection material→injection molding (mold)→green→lifted binder sintering→product. 

Metal powder injection molding production of tungsten carbide helix rod has high efficiency, high quality, precision, low power consumption advantages. 

carbide rods with double helix hole Processing Methods 

1. Billet processing method. The carbide bar prior to sintering the green compacts in drilling, the other end of the drilled hole at the same angle of 2-4. 

2. Mosaic Law. This method is called sandwich method, sintering combination method. That is processed into a spiral flute carbide rod surface, and then pressed into a hard metal pipe sleeve compacts and then sintered together. 

3. Squeeze method. The plastic compound mixture is extruded through a cut of the spout, the spout end of the installation of a large cylindrical hole formed spiral teeth containing these small teeth produce a rotating spiral during extrusion material through the formation of spiral groove slot. Our carbide rods with double helix hole including 15°, 35° and 45° ,with 330mm length 

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