The screw feeder of SEIWA GIKEN
A screw feeder is a device that discharges various powder and raw materials, by rotating a helical screw mounted inside a pipe.
The amount of discharge can be adjusted by changing the size of screw, (Diameter, winding pitch, etc.)In addition, it is possible to transport materials according to the characteristics of the material (good smoothness and fluidity, adhesion and cohesion, fluffy lightness, etc.) by changing the shape of the screw. Since the screw feeder can handle various powders, it is one of the stable transportation method
A screw feeder can stably and quantitatively feed powder or granular raw materials by rotating a screw with an even pitch, but caution is required when weighing a certain amount.
Generally, there are two types of screw feeder (Volumetric screw feeder, and weighing screw feeder)
Advantages ・The number of facilities is small, and the cost is low.
Disadvantages ・Error range varies depending on types of powder raw materials, and discharge conditions
Since the volumetric screw feeder determines the discharge amount by the pitch of the screw, it does not actually measure with a weighing scale.
If the raw material in the screw feeder is constant, it is possible to discharge a stable amount continuously.
However, if you want to weigh a fixed amount such as 500g or 1Kg, you cannot eliminate the error just by stopping at a certain time.
Furthermore, when the remaining amount in the hopper is low, the amount of discharge would also change due to the change in the pressure applied.
The shape and size of the screw are selected according to the characteristics and discharge amount of the powder raw material.
Stainless steel SUS304 is generally used as the material, and the surface finish is selected according to the using environment.
We generally use different types of screws, such as those carefully,
wound one by one by craftsmen, and special screws machined by using the latest multi-spindle lathe.
In addition, all welded parts that come in contact with powder are standardized as all-round welding, so there is no need to worry about contamination caused by powder remaining in gaps.
We deliver safe screws that can be used with confidence in any industry.