JPH0116593Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a cone-type extruder that continuously extrudes viscous materials such as plastic materials and rubber.
This invention relates to an extruder used in an intermediate process for continuously supplying pellets or strands to a machine that preforms them under high pressure. When processing a viscous material, the material kneaded by the kneader in the pre-process of the extruder of the present invention is a huge lump of highly viscous material. The method used was to cut the material and then feed it into an extruder. In response, the present inventor devised a twin-screw cone type extruder with a large material input port that could directly take in the huge lump kneaded in the kneader, and transferred it to the kneader and preforming machine in the previous process. We have completed a system that directly connects the extruder to continuously supply materials under high pressure. However, in conventional cone-type extruders, extrusion screw-type blades were formed all the way from the tip of the rotor to the root.
If this was applied directly to the extruder with the huge material input port mentioned above, the load on the rotor would increase because the screw radius is the largest at the base of the rotor, which would require a large driving force, and would also require a large amount of driving force to be applied to the kneader in the previous process. In this extruder, which simply pushes the material that has already been kneaded into the next preforming machine, there is a drawback that if kneading is performed again, the material becomes over-kneaded, leading to a decrease in quality. The present invention has been made in order to eliminate the above-mentioned drawbacks. The cone-type extruder of the present invention has a two-screw rotor shaft inclined in a direction in which the tip thereof descends, and the size of the material input port is formed to be as large as the width of the base of the container. An opening was formed at the base of the biaxial rotor, which is located below the mouth, so that the outer circumferential surface, which is an extension of the cutting edge of the screw type blade, was close to the inner surface of the container, and between the outer circumferential portion and the rotor shaft, through which the material could pass. It is characterized by the formation of a ribbon-type stirring tool. Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a plan view of the embodiment, and FIG. 2 is a longitudinal sectional view thereof. The extruder container 1 has a biaxial cone shape with an inclined axis.
A discharge port 2 is provided at the tip, and a material input port 3 is opened above the base. The size of this material input port is so large that the length of one side is approximately the same as the width of the container 1. A rotor 4 rotating inside the container,
5 are supported by bearings 6 and 7, and power is transmitted by bevel gears 8 and 9 so that they rotate in different directions. When the biaxial rotors 4 and 5 are divided into two parts, a tip part and a root part, screw type blades 10 and 11 are attached to the tip part.
is formed, and a ribbon-type stirring tool 1 with extended cutting edges of screw-type blades 10 and 11 is formed at the base.
2 and 13 are formed. The ribbon-type stirring tools 12 and 13 have their base end supported by a support 14 and their tip end supported by screw-type blades 10 and 1.
It is fixed to the base end of the container 1, and is almost straight in the axial direction, but is slightly inclined or twisted in the direction of feeding the material toward the tip, and the outer peripheral surface 15 is close to the inner surface of the container. There is. That is, openings are formed between the ribbon-type stirring tools 12, 13 and the rotor shafts 4, 5 through which the material can pass. Further, the rotor shaft on which the ribbon-type stirring tools 12 and 13 are provided is formed not in a conical shape but in a cylindrical shape. FIG. 3 illustrates the cross-sectional shape of the ribbon-type stirring tools 12 and 13. A is a semicircle, b is a square, and c is a substantially triangular shape, all of which have adjacent surfaces 16a, 16b, and 16c parallel to the inner surface 17 of the container. Although this is not an essential component of the present invention, it helps to reduce the load as much as possible since the material is not compressed. As a modified example of the ribbon-type stirring tool of the present invention,
It may be formed not almost linearly in the axial direction, but in a spiral shape, and it is not a shape consisting only of a ribbon-like portion close to the inner wall of the container, but is a blade type embedded in the rotor shaft, with the cutting edge visible. It is also possible to form an opening in the portion as appropriate. According to the present invention, the size of the material input port is made as large as the width of the base of the container, and the cutting edge of the screw-type blade is attached to the base of the biaxial rotor below the material input port. Since the extended ribbon-shaped stirring tool is formed, it is possible to directly take in the huge lump of material kneaded in the kneader in the previous process, and the drive torque of the two-shaft rotor is significantly reduced, making it possible to improve the quality of the material. I was able to prevent over-kneading. By the way, when we tested the performance of a conventional product with screw-type blades extending to the root of the rotor shaft and a product implementing the present invention, we obtained the following results.

[Table] Test conditions Capacity of container 1 110 Material input port 3 71cm x 61cm Motor for twin-shaft rotor Rated 5.5KW Material used Polyethylene According to this data, when the motor current, or drive torque, is constant, the amount of emissions increases by 38%. ing.
Further, since the tip of the biaxial rotor shaft is inclined in a downward direction, the material does not remain on the bottom of the container, and the material is smoothly sent toward the discharge port by its own weight. Therefore, the batch type kneader in the previous stage and the extruder of the present invention are directly connected, and a roller molding machine that controls the next process,
Pellet molding machine, pellet strand molding machine,
Furthermore, an integrated processing system is realized in which the extruder of the present invention is directly connected to a straight screw type extruder connected upstream of these molding machines, and productivity is dramatically improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view thereof, and FIG. 3 is a cross-sectional view illustrating the shape of a ribbon-type stirrer according to the present invention. 1... Extruder container, 2... Outlet, 3... Material input port, 4, 5... Rotor, 10, 11... Screw type blade, 12, 13... Ribbon type stirring tool.

Claims (1)

[Scope of utility model registration request] In an apparatus in which a screw-type blade is formed on a cone-shaped biaxial rotor, a material input port is provided at the upper side of the base of a container surrounding the biaxial rotor, and a material discharge port is provided at the tip, the biaxial rotor shaft is The tip thereof is inclined in a downward direction, the size of the material input port is formed to be as large as the width of the base of the container, and the screw is attached to the base of the biaxial rotor below the material input port. A cone comprising a ribbon-type agitator whose outer circumferential surface, which is an extension of the cutting edge of the mold blade, is close to the inner surface of the container, and where an opening through which the material can pass is formed between the outer circumferential portion and the rotor shaft. mold extruder.