JPS5914916A - Method and apparatus for cooling and curing melted resin - Google Patents

Abstract

PURPOSE:To obtain efficiently a small mass of a resin uniform in property, by charging a melted resin into a chamber of a container, the chamber being in the shape of a rotating body, and cooling the melted resin while rotating the container about its rotational axis. CONSTITUTION:When a resin that is hard and brittle at normal temperatures such as rosin-modified phenolic resin is taken out from a kettle, the melted resin is charged into the chamber 11 of the container 1 that is in the shape of a rotating body, and the chamber 11 is rotated about the rotational axis 31 to cause the melted resin to adhere to the chamber wall, during which the melted resin cooled and cured. It is preferably that a cooling liquid is forcibly brought in contact with the outer surface of the container 1 and at the same time a cooling gas is fed into the chamber of the container so that the resin is forcibly and rapidly cooled. Thus since the product can be taken out from the kettle quickly and cooled and cured, a uniform product can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for cooling and solidifying a resin that is hard and brittle at room temperature, such as D-disi modified phenol resin, from a molten state.

After the resin is produced, it is usually solidified, crushed into small pieces, and then packaged and shipped.

For example, 0disi-modified phenolic resin is poured out in a molten state from a reaction vessel onto a belt conveyor, solidified by natural heat dissipation or forced cooling while moving on Koshiveer, and is scraped off by a doctor at the end of Koshiveer. Crush into flakes or small pieces.

Alternatively, a drum with a built-in cooling device may be used instead of the belt conveyor, but in this case as well,
The modified phenolic resin is poured from the reaction vessel onto a drum, and while rotating at a certain angle with the drum, it radiates heat and solidifies, and is then scraped up by a doctor to form flakes. However, in any of the above cases, it is necessary to keep the inside of the reactor at a high temperature in order to keep the resin in the reactor in a molten state. Therefore, there is a difference in thermal history between the initial resin and the final resin flowing out from the reaction vessel, and as a result, there is a drawback that uniform properties cannot be obtained.

Furthermore, since the molten resin spreads thinly, the thickness of the solidified resin is limited to 51 JI%, usually 2 to 3 tax, which limits the processing capacity per unit area of the equipment, resulting in poor productivity.

It is an object of the present invention to overcome these drawbacks of the prior art and to provide a method and apparatus for efficiently mobilizing logic-modified phenolic resin agglomerates with uniform longevity.

In order to achieve the above object, the present invention puts molten resin into a chamber of a container having a chamber shaped like a rotating body, rotates the container around the rotational axis of the chamber, and directs the molten resin to the inner wall of the chamber. Provided is a method for cooling and assimilating a molten resin, characterized in that the molten resin is made to adhere to the circumferential surface of the chamber and solidified by cooling by adhesion force and centrifugal force acting on the molten resin as the rotation occurs. As an apparatus for implementing this, there is provided a container having a chamber in the shape of a rotating body, a supply port for supplying molten resin into the chamber, and an outlet for taking out the resin from the chamber, and The present invention provides an apparatus for cooling and solidifying molten resin, characterized in that it is equipped with a drive unit for driving and rotating a container.

In the method of the present invention, the cooling may be performed only by natural heat radiation inside and outside the container, but in order to improve efficiency, a refrigerant may be forcibly brought into contact with the outer surface of the container, or It is also possible to supply cooling gas to the interior of the container, and it is also possible to forcibly bring the refrigerant into contact with the outer surface of the container and to circulate the cooling gas inside the container.

The apparatus of the present invention is equipped with either or both of an external cooling device that allows a refrigerant to be forcibly brought into contact with the outer surface of the container, and an internal cooling device that supplies cooling gas into the chamber, thereby increasing cooling efficiency.

The resin solidified and adhered to the inner peripheral surface of the container causes cracks either naturally due to shrinkage or by applying an impact to the container,
The impact causes the container to flake off into small pieces, but since the chamber is in the shape of a rotating body, cracks (101) occur in the radial direction of the container (100) as shown in FIG. The fan-shaped cross-section portions (102) formed by the cracks interact with each other to form a so-called ridge, and may not fall from the circumferential surface of the container chamber.

In preparation for such a case, the present invention also provides an apparatus in which the container has a pointed protrusion on the inner peripheral surface thereof.

The pointed protrusion may be a protrusion that continuously extends on the inner peripheral surface of the chamber. Further, the protrusion may be spiral or spiral-shaped around the rotational axis of the chamber, and in this case, the feed screw effect of the spiral or helical protrusion that occurs when the container rotates in a certain direction After solidification, the crushed resin lumps can be taken out automatically or easily.

Next, embodiments of the method of the present invention will be described with reference to the accompanying drawings together with an example of a cooling solidification apparatus for logiυ modified phenolic resin.

The cooling and solidifying device for logic-modified phenolic resin shown in FIGS. and an internal cooling device (3) for circulating water.

The container (1) has a cylindrical body and a chamber (11) inside.
), and is supported by a support drive device (4) so that the center axis of the cylinder is substantially horizontal. Support drive device (4)
is four 0-lers (4X) that support the container (1), and the
- Equipped with an electric upper gear C4 that drives the roller through a transmission (4 seats and a belt device (4□□□).

The container (+) is closed at one end and has a solidified resin outlet θ2) at the other end. The outlet (12) is the container (1)
The container +1 is provided with an opening that opens on the entire surface of the other end, and a closing lid (131) that freely seals the opening with a fastener (14). It is equipped with a molten resin supply port (+5) that fits tightly.The supply port (15) is connected to the supply pipe (5) via a rotary joyseat (■6), and an assimilation port (+5) is provided below the outlet port (12). A popper (6) is provided to receive the resin when it is taken out.

The external cooling device (2) is a pie-5 (2) that is installed approximately horizontally above the container (1) and has many small holes arranged in parallel on the bottom surface.
The cooling liquid is pumped and supplied to the outer peripheral surface of the container through the small holes.

The internal cooling device (3) is equipped with pipes 5 (3) 1 and (32) penetrating the wall on the closed end side of the container f+, and the compressed cooling gas is supplied from the pipe pipe l), ) and then discharged from pipe (32).
, (32 is rotatably and airtightly connected to the container (1) by a double inner tube fixed type rotary joysite. In order to cool and solidify the logic modified phenolic resin, first, the supply port (11) is connected to the chamber (11). ) After pouring an appropriate amount of molten resin into the motor +44>, while supplying cooling liquid and cooling gas from the external cooling device (2) and internal cooling device (3), respectively.
The container (1) is driven to rotate. As is clear from the figure, the amount of resin poured into the chamber (11) is such that it does not exceed the molten resin supply port (1 tube) and the pipe tube (31) of the internal cooling device.

The molten resin initially accumulates at the bottom of the container (I), but as the temperature decreases, it becomes more sticky, and as the chamber (11>inner periphery increases due to the adhesion force to the inner circumferential surface and the rotation of the chamber (container + 1)). Due to the action of the centrifugal force acting on the resin adhered to the surface, it spreads over the entire inner peripheral surface of the chamber (11) against gravity and gradually increases in thickness.In this way, the resin is spread almost evenly on the inner peripheral surface of the chamber (11). Spread it to a thickness,
It is solidified to obtain a cylindrical solidified resin layer (7) along the inner peripheral surface of the chamber (11). The solidified resin layer (7) naturally cracks due to shrinkage, but further cracks occur when the container +1) is subjected to an impact, and the impact causes it to peel off from the inner circumferential surface of the container and fracture at the same time. The crushed resin is transferred to the hopper (6) through the outlet (12) with the closed lid 03) opened.

Therefore, after the resin is transferred from the reaction vessel to the present apparatus, the resin is no longer maintained at a high temperature, so there is no difference in thermal history between the resin at the initial stage of solidification and the resin at the final stage of solidification. In addition, since the adhesive force of the molten resin and the centrifugal force acting on the resin cause the resin to adhere to the periphery of the container interior, a thick solidified resin layer can be obtained, and high productivity can be achieved with a compact device. . Furthermore, since the solidified resin can be transferred directly from the outlet of the container to the hopper, recovery is easy. In addition, as in this example, the cooling of the resin is carried out in the container f+.
) When forced both externally and internally, solidification proceeds quickly and efficiency is improved. Further, in this embodiment, the outlet (12) is sealed with a closing lid 0, and the supply port (1) is connected to the supply pipe (5), the pipe (31), and the G3
2 is a rotary joyseat (16) for each container ft')
, (Since the connection is airtight, heat and odor are not released into the atmosphere, and a good working environment is maintained.

FIGS. 3 and 4 show the main parts of other examples of containers in the cooling and solidifying apparatus. The container (white is equipped with a chamber (1 white) similar to the above-mentioned container (1), an outlet (12') and a supply port, but is further provided with a pointed ridge (17). 07)
are strip-shaped with a triangular cross section, and two of them are attached to the inner circumferential surface of the container (1') substantially parallel to the cylindrical center axis and facing each other.

Therefore, after the resin solidifies, a crack (201) is generated in the radial direction of the container due to the impact applied to the container (white) as shown in FIG. ) is formed, the portion in contact with the protrusion 0?) has a rectangular cross section or a reverse shape (208), so that a so-called bridge is not formed and it reliably peels off from the inner circumferential surface of the container.

As shown in FIG. 5, the pointed protrusion can be a protrusion that forms a spiral along the inner circumferential surface of the container, centered on the center axis of the white cylinder. As described above, the solidified resin reliably peels off from the inner wall of the container, and as the container (1") rotates, the crushed resin is brought to one end of the chamber (1") by the spiral protrusion (18). By appropriately selecting the hopper (in the example shown in Figure 5, by rotating it clockwise when viewed from the outlet (12')), the resin pellets are sent to the outlet (12') and into the hopper (6). ) is forced to fall inside.

The protrusions (+8!) do not need to be continuous spirals, and the same effect can be obtained by arranging short linear protrusions in a spiral.Also, the number of protrusions, the size of the apex angle, and the height It can be made as appropriate depending on the type of resin.

In the embodiment, a case has been described in which the container rotates around a substantially horizontal axis, but the container has a substantially vertical axis. Appropriate means other than those described above may be used to support and drive the container.

The external cooling device and the internal cooling device can be various devices as long as they are capable of cooling the peripheral wall of the container and supplying cooling gas into the interior of the container. For example, the external cooling device may include a cooling bath in which a portion of the container can be immersed.

As the cooling gas, appropriate gases such as air, inert gas, nitrogen, etc. can be used.

In order to peel off the solidified resin from the inner circumferential surface of the container, as shown in FIG. 8) may be provided on the left side.

As is clear from the above, according to the present invention, it is not only possible to efficiently obtain 0-di-modified phenolic resin pellets with uniform properties, but also to be generally advantageous in obtaining thermoplastic resin pellets that are hard and brittle at room temperature. It is possible to provide an apparatus for cooling and solidifying molten resin.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention.
The figure is a side view partially showing the device according to the first embodiment, FIG. 2 is a front view partially showing the device shown in FIG. 1, and FIG.
4 is a cross-sectional view taken along the line A-A in FIG. 3, and FIG. 6 is a cross-sectional view showing a part of the container shown in FIG. 1 together with solidified resin, and FIG. 7 is a cross-sectional view showing a part of the container shown in FIG. 3 together with solidified resin. (1)・・・・・・Container (2)・
......External cooling device (3)...
・Internal cooling device (4)・・・・・・・Support drive device (7)・・・・−・・Solidified resin layer (
11)・・・・・・・・・Room (+2)・・・・・・・・・
・Outlet port (15)・・・・・・・Supply port 0η・・・・・・・−・Pointed protrusion (+8)
・・・・・・・・・Spiral protrusions (and above)

Claims (1)

[Claims] ■ A molten resin is placed in a chamber of a container having a chamber shaped like a rotating body, and the container is rotated about the rotation axis of the chamber to increase the adhesion force of the molten resin to the inner wall of the chamber. . A method for cooling and solidifying a molten resin, characterized in that the molten resin is caused to adhere to the inner circumferential surface of the chamber and is cooled and solidified by a centrifugal force acting on the molten resin as the molten resin rotates. (2) A method for cooling and solidifying a molten resin according to claim 1, characterized in that during the cooling, a refrigerant is forcibly brought into contact with the outer surface of the container. (2) The method for cooling and solidifying a molten resin according to claim 1 or 2, characterized in that during the cooling, a cooling gas is supplied into the container chamber. ■ A container having a rotating body-shaped chamber, a supply port for supplying molten resin into the chamber, and an outlet for taking out the resin from the core chamber, and a drive device that drives and rotates the container about the rotation axis of the chamber. A molten resin cooling and solidifying device characterized by comprising: ■ A container having a rotating body-shaped chamber, a supply port for supplying molten resin to the chamber, an outlet for taking out the resin from the chamber, and a pointed projection disposed on the circumferential surface of the chamber, and An apparatus for cooling and assimilating molten resin, comprising a drive device that drives and rotates the container about the rotation axis of the chamber. (2) The apparatus for cooling and solidifying molten resin according to claim 5, wherein the pointed projection is a protrusion extending continuously on the circumferential surface of the chamber. (2) The apparatus for cooling and solidifying molten resin according to claim 6, wherein the protrusion extends in a spiral or helical shape centered on the rotational axis of the chamber.