JPS6217213Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pellet cooling transfer device.

In conventional pellet molding, as shown in FIG. 1, a generally cylindrical molding chamber 3 is provided at one end of an extruder 1, with the opening surface of a pelletizer 2 having a large number of small holes exposed on the inner periphery. The long molded product pushed into the molding chamber 3 is cut by a rotary cutter 4 to form pellets 5, and air is sent to the molding chamber 3 from an outside blower 6 to transport the pellets 5 inside the molding chamber 3. Conveyed through pipe 7 into cyclone 8,
The pellets 5 are stored in a container 9. However, since the pellets 5 in the molding chamber 3 have just been molded and are still in a high-heat molten state, the pellets 5 may fuse together within the transfer pipe 7 or adhere to the inside of the transfer pipe. , the transfer pipe becomes clogged. In addition, especially if colored pellets adhere to the inside of the transfer pipe, this color will be adhered to the pellets when other colored pellets are molded later, and the desired colored pellets will not be obtained, resulting in a large loss. In addition, when the pellets are used as a raw material after being molded as shown in FIG. The pellets 5 may adhere to the inner wall, or the pellets 5 may
There was a risk that they would stick to each other and cause the same problem as above.

This idea was made in consideration of these points, and by cooling the pellets immediately after molding during transfer, the pellets can be transferred and stored smoothly without sticking to each other or to the transfer pipe etc. In addition to providing a cooling transfer device, it is possible to easily apply a surface modifier such as an antistatic treatment to the pellets at the same time as the above-mentioned cooling, if necessary.

Hereinafter, an embodiment of this invention will be explained with reference to the drawings. In addition to the apparatus shown in FIG. Using an ultrasonic generator etc., measure the liquid to a particle size of 1 to 50.
A large number of aerosols of about μ are sent to the blower 6, and the transfer pipe 7 is provided with a water vapor separation device 14.

In this embodiment, a molded product extruded from a pelletizer 2 of an extruder 1 into a molding chamber 3 is cut by a rotary cutter 4, and a large number of pellets 5 are molded. On the other hand, the aerosol generated in the aerosol generator 13 is sent to the blower 6.
Air containing aerosol is blown into the molding chamber 3 from the molding chamber 3. This air swirls the pellets 5, which are still in a molten state immediately after molding, in the molding chamber 3, and is then blown away through the transfer pipe 7 and transferred to the cyclone 8. A large number of aerosols adhere to the pellets 5. Since the pellets 5 are still in a molten state and the aerosol is minute, the moisture evaporates immediately when it adheres to the pellets 5, and as a large number of them adhere, the pellets 5 are rapidly cooled by the latent heat of the vapor. In this way, the pellets 5 are cooled by a large number of aerosols attached to them during transfer in the molding chamber 3 and the transfer pipe 7, and the water vapor caused by the adhesion of the aerosols to the pellets 5 is separated by the transfer pipe 7. Discharge from device 14. The pellets 5 then pass through the transfer pipe 7 and enter the cyclone 8 in a sufficiently cooled state.

Therefore, the pellets 5 are prevented from adhering to the inner wall of the transfer pipe 7,
There is no mutual adhesion of the pellets 5, and the transfer can be carried out smoothly, and there is no possibility that the pellets 5 will become clogged in the transfer pipe 7 or the like. Furthermore, in the past, the blade of the cutter 4 was heated and there was a risk that the molded pellets 5 would adhere to the blade, but in this invention, as described above, the pellets 5
Since the pellets 5 are cooled and the aerosol adheres to the blades to suppress heating, there is no risk of the pellets 5 adhering to the blades of the cutter 4. Also, after forming the pellet 5,
When using this, it is sufficiently cooled, so
For example, even when used as a raw material for molding, it has never clogged up inside the machine.

Moreover, instead of the above embodiment, the aerosol generator 1
For example, an aqueous solution or aqueous dispersion containing an antistatic agent is placed in the container 3 and aerosolized. Air containing this aerosol is then blown into the molding chamber 3 by the blower 6. As a result, a large number of aerosols adhere to the pellets 5 in the molding chamber 3, only the water in the aerosols immediately evaporates, and the antistatic agent adheres to the surface. In this manner, each pellet 5 is cooled and at the same time a thin film of antistatic agent is formed on the outer peripheral surface.

Therefore, antistatic treatment is performed at the same time as cooling and transferring the pellets 5, and even if the pellets 5 collide with each other in the transfer pipe 7 and cyclone 8, static electricity is not generated and they do not stick to each other or to other objects. There is no risk of dirt and dust adhering to the surface.
Purity can be maintained when using the pellets 5.

Although an antistatic agent was used in this embodiment, it is needless to say that the pellets 5 may be coated with an appropriate surface modifier such as an antifogging agent, an antirust agent, an antifungal agent, or the like.

As described above, this invention allows pellets that are still in a molten state to be cooled very easily and reliably during transport immediately after molding, and if necessary, a surface modifier can be applied at the same time as cooling. It has various effects such as making it easier to

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a pellet molding and transporting device, FIG. 2 is a schematic diagram showing how pellets are used as a raw material for molding, and FIG. 3 is a schematic diagram showing the device of this invention. In the figure, 1 is an extruder, 2 is a pelletizer, 3 is a molding chamber, 4 is a cutter, 5 is a pellet, 6 is a blower, 7 is a transfer pipe, 8 is a cyclone, and 13 is an aerosol generator.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A molding chamber in which a long molded product extruded from a pelletizer of an extruder is cut by a rotary cutter to mold a large number of pellets, and the pellets in this molding chamber are transferred to a cyclone. The pellet molding apparatus has an aerosol generator that turns an aqueous solution or an aqueous dispersion into an aerosol, and a blower that blows the aerosol generated by the generator into the molding chamber and the transfer pipe together with air. A pellet cooling transfer device characterized by: (2) The pellet cooling and transfer device according to claim (1) of the utility model registration claim, characterized in that the aqueous solution or aqueous dispersion contains a surface modifier such as an antistatic agent.