JP2580994Y2 - Gear roll body of extrusion granulator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear roll of an extrusion granulator for forming a granule.

[0002]

2. Description of the Related Art Gears provided with a number of small holes in the tooth bottom.
The moistened material is supplied between both gear rolls while engaging and rotating the rolls, and the teeth of one gear roll forcibly apply the material to the bottom of the other gear roll. A granulator is known in which the material is formed into a rod shape by a small hole at the bottom of the tooth, and the molded body extruded from the small hole is cut into an appropriate length by a knife cutter. However, the gear roll in this granulator has a problem that, when processing a powdery material having high abrasion, the small holes at the bottom of the tooth are worn, and the diameter becomes large with the passage of time. There is a problem that the diameter becomes non-uniform. As a method to solve such problems,
It is conceivable that the entire gear roll is made of a material having extremely high wear resistance such as ceramics, but there is a problem that the production is troublesome and very expensive. The present invention has been made in view of the above problems, and significantly reduces the wear of the small holes in the tooth bottom and enables the diameter of the extruded granules to be uniformly formed for an extremely long time. Extrusion granulator gears
It is intended to provide a roll body.

[0003]

Means for Solving the Problems To achieve the above object, a gear roll body according to the present invention is a gear roll having a hollow portion formed by hollowing a main body wall into an annular body having a U-shaped cross section. A tip made of a wear-resistant material, in which a plurality of small through holes are formed at appropriate intervals in the tooth bottom of the gear roll, is fitted and bonded.

[0004]

According to the present invention, by adopting the above solution, a gear roll can be manufactured at low cost, and a granulated material which is extruded and formed even when a highly abradable powder is processed. Can be formed with a constant diameter for a long period of time.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, two shafts 2,
The shafts 2, 2 ′ are rotatably mounted side by side horizontally, and the shafts 2, 2 ′ are connected by a timing gear 4 so that they can rotate synchronously. A gear roll 3, 3 'is connected to one end of each of the shafts 2, 2' by a spanning ring 12, as shown in FIG.
As shown in FIG. 4, 3 'has a hollow portion 3A formed by hollowing the main body wall into an annular body having a U-shaped cross section, and the other end of one of the shafts 2 and 2' is connected to the base. The gear rolls 3 and 3 'are connected to a variable speed motor 5 mounted on the base 1 so that the gear rolls 3 and 3' are rotated in an engaging direction (the direction of the arrow in FIG. 2) at an arbitrary rotational speed. Have been. A variable speed motor 13 is mounted on the base 1 above the shafts 2 and 2 'via a mounting base 13A.
The feed screw 6 is connected to a vertical feed screw 6 provided in a conical raw material supply hopper 7 installed at a position directly above the feed screw 3 'by a gear box 8, whereby the feed screw 6 can rotate at an arbitrary speed. It can be rotated by a number.
The feed screw 6 is located at an appropriate distance above the gear rolls 3, 3 ', and is located at the center of the gear rolls 3, 3' where the tips of the screws 6 mesh with each other. It is installed so that it can come. A cover 14 for preventing the raw material from spilling during molding is mounted on the overhanging plate 7A on the lower bottom surface of the hopper 7 on the upper front center of the gear rolls 3 and 3 '. In order to cut the granulated raw material into an appropriate length, its cutting edge is required in parallel with the shafts 2 and 2 'toward the hollow portion 3A of the gear rolls 3 and 3'. A knife cutter 10 extending to the length is attached. The gear roll 3,
As shown in FIGS. 3 and 4, a ceramic chip 9 having a plurality of small through holes 9A formed at appropriate intervals is fitted and bonded to the entire circumference of the tooth root 3 '. Since the lower part of the chip 9 has a tapered stepped shape, the chip 9 does not easily come off even if a force is applied during molding. Reference numeral 11 in the drawing denotes a shot for guiding a molded product in a falling manner.

In FIG. 2, an appropriate amount of processing material is charged into the conical hopper 7, and the vertical feed screw 6 is rotated so that the processing material meshes with each other and rotates. -It is forcibly fed between the rolls 3 and 3 '. And, the raw material is the above gear
The gear rolls 3, 3 'are engaged by the engagement of the gears 3, 3'.
The ceramic chip 9 fitted and bonded to the tooth bottom
Is formed by being pressed into the through hole 9A.
Extruded into the hollow portion 3A of the hole 3, 3 '. The molded body extruded in this manner is cut to a predetermined length by the knife cutter 10 and collected by a shoe 11 installed below the gear rolls 3 and 3 '. In the above embodiment, ceramic is used as the chip 9, but a wear-resistant material such as a cemented carbide may be used.

[0007]

As is apparent from the above description, the present invention provides a tip made of a wear-resistant material in which a plurality of small through holes are formed in the bottom of the gear roll of a gear roll type extrusion granulator. The gear roll body can be easily manufactured by fitting and bonding, and the expansion due to wear of the small holes is greatly reduced, and the diameter of the granulated material can be kept constant in long-term granulation molding. It is possible to keep.

[Brief description of the drawings]

FIG. 1 shows a gear roll equipped with a gear roll body of the present invention.
FIG. 2 is a side view of the extruder.

FIG. 2 is a partially cut-away enlarged view taken along a line II in FIG.

FIG. 3 is an enlarged detail view of a portion A in FIG. 2;

FIG. 4 is an enlarged view as viewed from the direction of the arrows in FIG. 2;

[Explanation of symbols]

 3, 3 'gear roll 3A hollow portion 9 wear-resistant material tip 9A small through hole

Continuation of the front page (56) References JP-A-64-34433 (JP, A) JP-A-54-68863 (JP, A) JP-A-52-36148 (JP, A) , U) Japanese Utility Model 4-5228 (JP, U) Japanese Utility Model 1-70514 (JP, U) Japanese Utility Model Application 61-155364 (JP, U) Japanese Patent Publication No. 41-14976 (JP, B1) (58) Surveyed field (Int.Cl. ⁶ , DB name) B01J 2/00 B01J 2/20 B30B 11/28

Claims (1)

(57) [Scope of request for utility model registration] 1. Gear rolls 3 and 3 'forming a hollow portion 3A in which a wall surface of a main body is hollowed out in an annular body having a U-shaped cross section, and teeth of the gear rolls 3 and 3'. A gear roll body for an extrusion granulator characterized in that a chip 9 made of a wear-resistant material having a plurality of small through holes 9A drilled at appropriate intervals at the bottom is fitted and bonded.