JP2001061946A - Method and device for making particle substance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a particle substance in a uniform length by continuously making the particle substances having a length equivalent to an interval between dice and a belt in such a way that plastic is pushed out of a lot of small holes of the dice in a stringy shape and a stringy body is touched to the belt moving in parallel to the dice to be cut like a particle. SOLUTION: In an extruding forming machine 1, medical plastics is thrown into a hopper 4, and is kneaded by a screw 5a in a kneading section 5, air and water are made vacuous at a gas removing section 6, and the plastics after removing gas is compressed by a screw 7a at a compressing section 7 is conveyed to a lower side, and the plastics in half hardened condition is pushed out of small holes of dice 8 in a stringy shape. In a cutting machine 2, plural pieces of a stringy shape body R pushed out of the dice 8 are touched to an endless belt 9 moving in parallel to the dice 8 and are cut like a particle. Particles P having a length equivalent to an interval between the dice 8 and the belt 9 are conveyed by the belt 9 and collected at a collecting box 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for producing a granular material such as a medicine or food.

[0002]

2. Description of the Related Art For example, as a method for producing a medicine, as shown in FIG. 5, a medicinal plastic material is extruded in a string form from a number of small holes provided in a die 22 of an extruder 21, and an outlet of the die 22 is formed. The cutter 23 is operated intermittently in the vicinity,
A technique is known in which the cord R is cut into granules by the cutter 23 to continuously produce the powder P.

[0003]

However, in this type of extruder 21, as shown in FIGS. 5A and 5B, the extrusion speed of the cord-like body R depends on the extrusion conditions.
May differ between the outer peripheral portion and the central portion. For this reason,
According to the conventional method using the cutter 23, there is a problem that the length of the powder P becomes uneven.

Accordingly, an object of the present invention is to provide an apparatus and a method capable of producing a granular material with a uniform length.

[0005]

In order to solve the above-mentioned problems, a method for producing a granular material according to the present invention comprises extruding a plastic material into a string from a number of small holes provided in a die, and forming the string into a die. The method is characterized in that it is cut into granules by contacting with a belt that moves in parallel with the belt, and granules having a length corresponding to the distance between the die and the belt are continuously produced. In addition, the apparatus for manufacturing a granular material according to the present invention includes a screw that extrudes a plastic material into a string from a number of small holes provided in the die, and a belt that moves in parallel with the die, and brings the string into contact with the belt. And continuously producing granules having a length corresponding to the distance between the die and the belt.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an apparatus for producing a powder as a granular material. This powder manufacturing apparatus comprises an extruder 1 for extruding a medicinal plastic material into a string, and a string-shaped body R
And a collecting device 3 for collecting the powder P.

The extruder 1 includes a hopper 4 for charging a plastic material, a kneading unit 5 for kneading the plastic material with a screw 5a, a degassing unit 6 for evacuating air and moisture in the plastic material, and a degassing unit. A pressurizing unit 7 that presses the airy plastic material by a screw 7a and sends it downward, and a die 8 that extrudes the semi-solidified plastic material in a string shape are provided.

The cutting machine 2 includes an endless belt 9 that moves in parallel with the end surface of the die 8 near the die 8 and a motor 10 that rotates the belt 9 at a high speed. The body R is brought into contact with the belt 9 to be cut into granules, and the cut powder P is transported to the collection device 3 by the belt 9.

As shown in FIG. 2, the die 8 is provided with a large number of small holes 11 which are outlets of the plastic material in a dense state. In the case of powder, the size of the small hole 11 is φ0.
It is preferably about 8 to 1.5 mm, and the shape of the small hole 11 is
The shape is not limited to a circle as shown in FIG.
It may be a variant as shown in FIG.

Next, a method for producing a powder using the apparatus having the above configuration will be described. First, in the extruder 1, a medicinal plastic material is put into a hopper 4, kneaded by a screw 5a in a kneading section 5, air and moisture are evacuated in a deaeration section 6, and deaeration is performed in a pressing section 7. The latter plastic material is pressurized by the screw 7a and sent downward, and the semi-solidified plastic material is extruded in a string form from the small holes 11 of the die 8.

Subsequently, in the cutting machine 2, a large number of cords R extruded from the dies 8 come into contact with an endless belt 9 moving in parallel with the dies 8, and are cut into granules. As a result, powder P having a length corresponding to the distance between the die 8 and the belt 9 is continuously manufactured, and thereafter the powder P is conveyed by the belt 9 and collected by the collection device 3.

According to the above manufacturing apparatus and method, as shown in FIG. 4, even when the extrusion speed is different between the outer peripheral portion and the central portion of the die 8, each of the cords R comes into contact with the belt 9. Cut at Therefore, the powder P can always be manufactured with a uniform length regardless of the extrusion conditions of the plastic material.

In the above-described embodiment, the method of transporting and collecting the powder P by the belt 9 has been exemplified. However, a method of recovering the powder P by suction with a blower may be adopted. In addition, the present invention is not limited to the production of pharmaceuticals alone, and can be applied to the production of various granular materials such as foods, fertilizers, feeds, and the like.Other steps may be appropriately performed without departing from the spirit of the present invention. It is also possible to change to the implementation.

[0014]

As described in detail above, according to the present invention,
Since a method is employed in which the string-shaped material extruded from the dies is brought into contact with a belt moving in parallel with the dies and cut into granules, an excellent effect that granules can be manufactured with a uniform length is produced.

[Brief description of the drawings]

FIG. 1 is a schematic view of a powder manufacturing apparatus showing one embodiment of the present invention.

FIG. 2 is a plan view showing a die of the extruder.

FIG. 3 is a reference diagram illustrating a small hole shape of a die;

FIG. 4 is an explanatory view showing a cutting operation by a belt.

FIG. 5 is a schematic view showing a conventional manufacturing method.

[Explanation of symbols]

1. Extruder, 2. Cutting machine, 5. Kneading unit, 6.
-Deaeration part, 7-Pressure part, 8-Dice, 9-Belt, 11-Small hole, R-String, P-Powder.

Claims (2)

[Claims] 1. A plastic material is extruded in a string form from a number of small holes provided in a die, and the string-shaped body is cut into particles by contacting with a belt moving in parallel with the die, which corresponds to the distance between the die and the belt. A method for producing a granular material, comprising continuously producing a granular material having a length. 2. A screw for extruding a plastic material in a string form from a number of small holes provided in the die, and a belt moving in parallel with the die. An apparatus for continuously producing a granular material having a length corresponding to the distance between the belt and the belt.