JPH0332736A - Glanulator - Google Patents

Abstract

PURPOSE:To uniformize the size of a granulated material by closing the discharge port of a rotary cylinder with a fixed body and a sliding block at a part where the sliding block is brought into contact with the outer surface of the cylinder to hold a fluid material within the discharge port. CONSTITUTION:The granulator for supplying a fluid material 3 onto a conveyor belt B is provided with the rotary cylinder 2 having many discharge ports 1 for the material 3, a part 4 for supplying the material 3 into the discharge ports 1, the fixed body 5 in contact with the inner surface of the cylinder 2 and the sliding block 6 in contact with the outer surface of the cylinder 2. The material 3 is supplied into the discharge port 1 sent to the position of the supply part 4 by the rotation of the cylinder 2, the discharge port 1 at the part where the block 6 is brought into contact with the outer surface of the cylinder 2 is closed with the fixed body 5 and the block 6 to hold the material 3 within the discharge port 1, and the material within the discharge port 1 is discharged from the discharge port 1 under the cylinder 2 where the block 6 is not brought into contact with the outer surface of the cylinder 2.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention supplies a fluid substance such as a melt of a heat-meltable substance onto a conveyor belt in the form of drops, and cools and solidifies it on the belt. The present invention relates to a granulation device that separately feeds a fluid substance onto a conveyor belt during granulation.

"Prior art" Conventionally, this type of device has been developed using the Japanese Patent Publication No. 624373.
A device described in Publication No. 2 is known.

The device comprises a fixed cylindrical container arranged above the conveyor belt and having a plurality of first openings in a wall portion facing the conveyor belt for passing the flowable material, at least in said wall portion. a rotatable second cylindrical container that is in sliding contact with the first cylindrical container and has a plurality of second openings distributed over the entire circumferential wall;
The fluidized Yak 44 material is configured to be allowed to be extruded when the opening of the second cylindrical container coincides with the opening of the first cylindrical container 2x.

"Problem to be Solved by the Invention" However, in the above-mentioned apparatus, the discharge amount of the fluid substance is
It is determined by the size of the discharge pores and the pressure and flow characteristics of the fluid material, and the discharge amount tends to change due to changes in the pressure and temperature of the fluid material, making it difficult to make the size of the granules uniform. there were.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a granulation device that can uniformize the size of granules.

"Means for Solving the Problems" The granulation device of the present invention is a granulation device that supplies a fluid material onto a conveyor belt, and includes a rotating cylinder in which a large number of discharge ports for the fluid material are formed, and a rotating cylinder that supplies a fluid material onto a conveyor belt. A supply unit disposed at the top of the cylinder and supplying a fluid substance into the discharge port, a fixed body provided in contact with the inner surface of the rotating cylinder, and a sliding block provided in contact with the outer surface of the rotating cylinder. The rotating cylinder is rotated so that the fluid substance is supplied into the discharge port which reaches the disposed position of the supply section, and the discharge port slides with the fixed body in the part where the sliding block is in contact with the outer surface of the rotating cylinder. The fluid substance is held in the discharge port by being blocked by the block, and the fluid substance in the discharge port is discharged from the discharge port below the rotating cylinder where the sliding block is not in contact with the outer surface of the rotating cylinder. was used as a means to solve the above problem.

Furthermore, a granulation device may be configured by providing a fluid material passage hole in the device corresponding to the supply section of the fixing body, and arranging a fluid material return hole communicating with the fluid material passage hole in the fixing body. .

Further, the fixed body is provided with a gas outlet at a position corresponding to the flow of the fluid material of the rotating cylinder, and a gas supply hole communicating with the outlet is provided in the fixed body to constitute a granulation device. It's okay.

The present invention will be explained below using the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, and reference numeral A in these figures indicates a granulation device.

This granulating device A includes a thick rotary cylinder 2 having a large number of pore-shaped discharge ports 1, and a supply supply for supplying a fluid substance 3 into the discharge port 1, which is disposed on the upper part of the rotary cylinder 2. 4, a fixed body 5 having a circular cross section that is provided in contact with the inner surface of the rotating cylinder 2, and a sliding block 6 that is provided in contact with the outer surface of the rotating cylinder 2.

The outer surface of the fixed body 5 is in close contact with the inner surface of the rotating cylinder 2, and is configured to close an inner outlet of a discharge port formed in the rotating cylinder 2. Inside this fixed body 5, a heated fluid passage 7 through which a heated fluid such as steam or heated air flows is arranged along the axial direction in order to keep the temperature of the fixed body 5 close to the melting point of the fluid substance 3. It is set up.

The supply section 4 is provided in the second part of the rotating cylinder 2, and includes a container body 8 in which a fluid substance is accommodated, and heated fluid jackets 9 disposed on both sides of the container body 8. A heat insulating material 10 is provided to cover the outside of the heated fluid jacket 9, and a heat insulating material 10 is provided inside the container body 8.
=111. Inside the container body 8, the rotating cylinder 2 forms the bottom of the container body 8, and the fluid substance 3 is supplied into the discharge port l.

The fluid substance 3 housed in the container body 8 is kept at a temperature above its melting point by a heating fluid such as steam or energized air supplied in a heating fluid jacket 9.

A wedge-shaped seal block 12 is attached to one end of the supply section 4, with a portion of the seal block 12 in contact with the outer surface of the rotating cylinder 2. This seal block 12 prevents the fluid substance 3 in the supply section 4 from leaking outside when the discharge port l enters the supply section 4 again after discharging, and also adheres to the outer surface of the rotating cylinder 2. The fluid material 3 is removed without scraping it off. In this figure, the symbol +3a is a fixing bolt that fixes the seal block 12 and one end of the container body 8, and the symbol q13b is a bolt that measures the movement of the sole block 12 into and out of the container body 8, and the rotation cylinder 2. This is an adjustment screw for adjusting the degree of contact of the seal pro and the nail 12 with the outer surface.

The sliding block 6 is in contact with the outer surface of the rotating cylinder 2 from the position where it contacts the other end of the supply unit 4 to the lower part of the rotating cylinder 2 where the fluid substance 3 is discharged from the discharge port l. It is arranged on the side of the rotating cylinder 2. The surface of this sliding block 6 in contact with the outer surface of the rotating cylinder 2 has the same arc as the outer surface of the rotating cylinder 2, and since the sliding block 6 is pressed against the rotating cylinder 2, the rotating When the cylinder 2 rotates, no space is created between the sliding block 6 and the outer surface of the rotating cylinder 2, and leakage of the fluid substance 3 can be substantially eliminated. As a method of pressing this sliding block 6 against the rotating cylinder 2, as shown in this figure, an adjustment bolt 15 screwed onto a fixed frame 14 is used.
In addition to the method of pressing the outer surface of the sliding block 6 with the tip of the slide block 6, a method of pressing the outer surface of the sliding block 6 with a spring, a roller, etc. can be used.

Furthermore, a heating fluid passage I6 is provided in the sliding block 6 to allow heating fluid such as steam or heated air to flow therein.
The temperature of this sliding block 6 can be maintained at a temperature higher than the melting point of the fluid material 3.

A conveyor belt B is provided at the bottom of the rotating cylinder 2. This conveyor belt B runs in the same direction at approximately the same speed as the circumferential speed of the rotary station 2, and is cooled so that the fluid material 3 that has fallen onto this conveyor belt B can be solidified. preferable. For this cooling, for example, a cooling method using water or air from the back side of the belt can be adopted. Also, if the solidification temperature of the fluid substance 3 is quite high (in other cases, the fluid substance can be sufficiently cooled and solidified even if the conveyor belt B is left at room temperature without being actively cooled). Note that the distance between the conveyor belt B and the rotating cylinder 2 is preferably set in the range of 5 to 30 mm.

Note that FIG. 2 is a diagram showing the end structure of the supply section 4,
A Zide seal plate 17, which is slidably provided on the upper part of the rotating cylinder 2, is closely fixed to the longitudinal end of the container body 8, so that the fluid substance 3 in the container main body 8 is leaked from the longitudinal end to the outside. It is designed to prevent leakage.

In order to granulate a fluid material such as a melt of a heat-molten material such as a solid fat or a thermoplastic synthetic resin using the granulator A configured as described above, first, the fluid material 3 is stored in the supply section 4. and keep warm at a temperature above the melting point. Next, the rotating cylinder 2 is rotated at a predetermined circumferential speed, and the conveyor belt B is moved at a predetermined speed to start the conveyance operation. The discharge ports 1 of the rotating cylinder 2 enter the container body 8 of the supply section 4 through the sole block 12 side, are immersed in the fluid substance 3, and are discharged into the discharge ports l... The fluid substance 3 is supplied to the.

The discharge ports 1 to which the fluid substance 3 is supplied pass through the supply section 4 and reach the portion in contact with the sliding block 6. At this contact portion of the sliding block 6, the discharge port l is connected to the fixed body 5.
Closed by the outer surface and the contact surface of the sliding block 6, the discharge port l...
・The fluid substance 3 is held inside.

The outlet l... which has passed through the contact part of the sliding block 6 and reached the lower part of the rotating cylinder 2 has its outer surface open, and due to the weight of the fluid substance 3 and the centrifugal force of the rotating cylinder 2, the outlet l... The fluid substance 3 inside is discharged downward.

The fluid substance 3 discharged from the discharge port 1 and falling onto the conveyor belt B is cooled and solidified while being conveyed by the conveyor belt B, becoming a solid granule, and before the next granule falls. Since the particles are transported, the particles do not stick to each other.

In this granulator A, the discharge amount of the fluid material 3 is determined by the internal volume of the discharge port 1. Since the fluid substance 3 can be discharged in a fixed amount by volumetric metering, the size of the granules can be made extremely uniform.

In addition, the internal volume of the discharge port 1 can be adjusted by the diameter of the discharge port 1 and the discharge port depth (corresponding to the thickness of the rotating cylinder), and multiple types of rotating cylinders can be used for each internal volume of the discharge port. By preparing and using these rotating cylinders interchangeably,
Granules of various sizes can be produced.

In the granulator A having the above configuration, a fluid material passage hole 18 is provided in a position corresponding to the supply section 4 of the fixed body 5, and a fluid material return hole 19 communicating with the fluid material passage hole 18 is provided in the fixed body 5. It may be configured such that when the discharge port 1 overlaps the fluid material passage hole 18, the inside of the container body 8 and the fluid material return hole 19 communicate through the discharge port 1 and the fluid material passage hole 18. .

By arranging these fluid material passage holes 18 and fluid material return holes 19, when the fluid material 3 is supplied into the discharge ports 1, .
Even if the fluid substance 3 is a highly viscous substance, it passes through the discharge port 1 and reaches the fluid substance passage hole 18.
The fluid substance 3 can be supplied without causing the inconvenience of air being mixed inside.

Discharge port 1... When supplying a fluid substance into the discharge port 1...
The fluid material 3 that has passed through ... and reached the fluid material passage hole 18
passes through the fluid material passage hole 18 to reach the fluid material return hole 19, and is led to the end of the granulator A through this hole,
It is returned to the supply section 4 again by a pump or the like. The shape of the eaves of the fluid material passage hole 18 is preferably circular or elongated depending on the flow characteristics of the fluid material 3. In addition, the fluid material return hole 19 is sloped so that one end in the longitudinal direction of the granulator A is higher and the other end is lower, so that the fluid material 3 can easily flow through the fluid material 3. Even if it is, it can be collected at the end of the granulator A by gravity flowing through the pores.

In addition, in the granulator A having the above configuration, a gas outlet 20 is provided in the fixed body 5 at a position corresponding to the fluid material discharge position of the rotating cylinder 2, and a gas supply hole 21 communicating with the outlet 20 is fixed. A gas such as hot air is sent into the gas supply hole 21 from the outside of the granulator A, and when the outlet 20 and the outlet 1 overlap, the outlet 1 is closed.
It may be configured such that gas is supplied inside.

By configuring the granulation device by arranging these blow holes 20 and gas supply holes 21, the discharge ports l... in which the fluid substance 3 is held reach the discharge position at the bottom of the rotating cylinder 2. At this point, the hot air overlaps the blow-off hole 20 and blows out the fluid material 3 inside the discharge port 1, allowing it to fall as granules. The falling time of the fluid material from the outlet 1 can be shortened, and the speed of the rotating cylinder 2 and the conveyor belt B can be increased. Therefore, the productivity in granulating the stringable material can be greatly improved.

"Effects of the Invention" According to the granulation device according to the present invention, the discharge amount of the fluid substance is determined by the internal volume of the discharge port, and positive-volume granulation can be performed, so the size of the granulated product can be extremely increased. It can be arranged uniformly.

In addition, by providing the fluid material passage hole and the fluid material return hole in the fixed body, when the fluid material is supplied into the discharge port in the supply section, the fluid material passes through the discharge port and flows into the fluid material passage hole. Since the fluid material is supplied into the discharge port in this state, the fluid material can be supplied without the problem of air being mixed into the discharge port even if the fluid material is a highly viscous material.

In addition, by providing a blowout hole and a gas supply hole in the fixed body, when the discharge port holding the fluid substance reaches the discharge position, hot air overlaps the blowout hole and is blown into the discharge port. Since the fluid substance can be blown out and dropped as granules, the falling time of the fluid substance from the discharge port can be shortened even when granulating highly viscous stringy substances, and the speed of the rotating cylinder and conveyor belt can be increased. be able to. Therefore, the productivity in granulating the stringable material can be greatly improved.

[Brief explanation of drawings]

1 and 2 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view of a granulating device, and FIG. 2 is a perspective view of the essential parts thereof. l...Discharge port, 2... Rotating cylinder, 3... Fluid substance, 4... Supply section, 5... Fixed body, 6... Sliding block [
J. I8...Fluid substance passage hole, 19...Fluid repurchase hole, 20...Blowout port, 21...Gas supply hole.

Claims (3)

[Claims] (1) A granulation device that supplies a fluid substance onto a conveyor belt, which includes a rotating cylinder in which a large number of discharge ports for the fluid substance are formed, and a rotating cylinder that is disposed at the top of the rotating cylinder and supplies the fluid substance into the discharge ports. a fixed body provided in contact with the inner surface of the rotating cylinder; and a sliding block provided in contact with the outer surface of the rotating cylinder; The fluid substance is supplied into the discharge port that has reached the position, and the discharge port is blocked by the fixed body and the sliding block at the portion where the sliding block is in contact with the outer surface of the rotating cylinder, and the fluid substance is held within the discharge port. A granulating device characterized in that the fluid material in the discharge port is discharged from the discharge port below the rotary cylinder where the sliding block is not in contact with the outer surface of the rotary cylinder. (2) In the granulation device according to claim 1, a fluid material passage hole is provided in a position corresponding to the supply section of the fixed body, and a fluid material return hole communicating with the fluid material passage hole is arranged in the fixed body. A granulation device characterized by: (3) The granulator according to claim 1 or 2, wherein the fixed body is provided with a gas outlet at a position corresponding to the fluid material discharge position of the rotating cylinder, and has a gas supply hole communicating with the outlet. A granulation device characterized in that it is disposed within a fixed body.