JPH0355530Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a screw feeder for cutting and transporting highly adhesive powder and granules.

``Prior Art'' Conventionally, as shown in FIGS. 2 and 3, screw feeders of this type include a screw feeder in which a spiral screw blade 2 is integrally fixed around a rotating shaft 1; Alternatively, as shown in FIGS. 4 and 5, there is no rotating shaft 1, and a spiral screw blade 2 is used.
It is known that the chisel rotates.

"Problems to be Solved by the Invention" However, in the conventional example shown in FIGS. There is a problem in that the parts adhere to each other, and the deposits grow, eventually forming bridges between the screw pitches as shown in FIG. 3, resulting in a reduction in conveyance capacity. Additionally, as shown in Figures 4 and 5,
Even when only the screw blade 2 is rotated, the problem arises that the powder 3 adheres to the screw blade 2 and grows, forming a bridge between the screw pitches. In this way, when deposits adhere to the screw feeder, it is necessary to stop the operation of the entire device and remove the deposits.

This invention was made in view of the above circumstances,
The purpose of this is to be able to remove the powder and granules that adhere between the screw pitches while the device is still running, to suppress the powder and granules from adhering between the screw pitches, and to prevent a decrease in conveyance capacity. Our goal is to provide a screw feeder that can.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides an outlet in the distal end of the housing, an inlet in the proximal end of the housing, and an inlet in the housing. A screw feeder is provided with a screw blade that is rotatably provided, and a fixed shaft is loosely fitted into the center of the screw blade, and which conveys powder, granular material, slurry, and other fluid materials, and the screw feeder is provided with an input port of the housing. The screw blade is rotatably supported by the side wall of the housing on the proximal end side.

"Function" In the screw feeder of the present invention, by rotating the screw blade, the conveyed material such as powder or granular material is conveyed, and the rotating screw blade and the fixed shaft in a fixed state are connected to each other. work together to shear the conveyed material between the screw pitches, constantly removing deposits from the corners of the fixed shaft and the screw blades, and also to ensure that the screw blades are attached to the side wall of the housing on the proximal side of the input port. By being rotatably supported, the conveyed material is transported from the input port to the output port by the rotation support part (bearing, etc.) of the screw blade provided on the side wall of the housing.
The rotary support part can be used stably over a long period of time.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIG. 1.

In FIG. 1, reference numeral 10 denotes an outer cylinder, and inside this outer cylinder 10 there is a fixed shaft 11 extending in the longitudinal direction.
is fixed. A hollow shaft 12 is rotatably attached to the side wall 10a at one end of the outer cylinder 10 via a bearing 14, with a loose fit around the fixed shaft 11. A spiral screw blade 13 is connected to one end of the hollow shaft 12 and is loosely fitted around the fixed shaft 11 . Further, a drive device (not shown) is connected to the other end of the hollow shaft 12, and this drive device drives the screw blade 1 along with the hollow shaft 12.
3 is set to rotate. Further, the outer cylinder 10 has an inlet 10b and an outlet 1 for powder and granular material.
0c is provided.

In the screw feeder configured as described above, when the hollow shaft 12 and the screw blades 13 connected thereto are rotated by a drive device (not shown), the screw blades 13 rotate the outer cylinder 10. The powder and granular material inputted from the input port 10b is transported and discharged from the output port 10c. In this case, due to the interaction between the rotating screw blade 13 and the fixed fixed shaft 11, the powder particles adhering to the fixed shaft 11 are removed from the screw blade 13.
It is sheared and scraped off. Therefore, powder particles do not adhere to the corner portions of the fixed shaft 11 and screw blades 13, and are removed smoothly and quickly. In this way, it is possible to transport the powder and remove the deposits at the same time without stopping the apparatus.

"Effects of the Invention" As explained above, the present invention has an outlet provided at the tip of the housing, an input port provided near the base end of the housing, and a screw blade rotatably provided in the housing. On the other hand, the screw feeder has a fixed shaft loosely fitted in the center of the screw blade and conveys powder, slurry, and other fluid materials, and the screw feeder is located on the proximal end side of the input port of the housing, Since the screw blade is rotatably supported by the side wall of the housing, as the screw blade rotates, the material to be transported such as powder or granules is conveyed and fixed to the rotating screw blade. By working together with the shaft to shear the conveyed material between the screw pitches, it is possible to remove powder and granules that adhere to the space between the screw pitches (the corner portion between the fixed shaft and the screw blade) while the device is being driven. In addition to being able to suppress the adhesion of powder and granules to the housing, it is also possible to prevent a decrease in conveying capacity. Therefore, it is possible to prevent the conveyed material being conveyed from the input port to the output port from entering the rotation support part (bearing, etc.) of the screw blade provided on the side wall of the housing, and the rotation support part can be prevented for a long period of time. It can be used stably.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure and Figure 3 show a conventional screw feeder in which screw blades are fixed to a rotating shaft.
Fig. 2 is a cross-sectional view of the conveyed object attached to the rotating shaft and the corner of the screw blade, Fig. 3 is a cross-sectional view of the condition in which a bridge is formed between the screw pitches, and Figs. 4 and 5 are the conventional This figure shows a screw feeder in which only the screw blades rotate, and FIG. 4 is a cross-sectional view of the screw blade with a conveyed object attached to it, and FIG. 5 is a cross-sectional view of the screw blade with a bridge formed between the screw pitches. 10... Outer cylinder (housing), 11... Fixed shaft,
13... Screw blade, 10a... Side wall, 10
b...Input port, 10c...Output port.

Claims (1)

[Scope of utility model registration request] An outlet is provided at the tip of the housing, an input port is provided near the base end of the housing, and a screw blade is rotatably provided in the housing, while a fixed shaft is loosely fitted in the center of the screw blade. A screw feeder for conveying powder, slurry, and other fluid materials, wherein the screw blade is rotatably supported on a side wall of the housing at a base end side of the input port of the housing. A screw feeder that has a self-cleaning action.