JP2003062830A - Method and apparatus for cooling kneaded resin mixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cooling a kneaded resin mixture which uses a flat nozzle as a nozzle for ejecting cooling water, can eject cooling water over a wide range in the lower surface of a conveyer belt by the flat nozzle, and can enough cool the resin mixture. SOLUTION: While the kneaded resin mixture is conveyed by the conveyer belt 1 with the resin mixture held on the upper surface of the conveyer belt 1, cooling water is ejected from the flat nozzle 2 toward the lower surface of the conveyer belt 1 below the resin mixture through the conveyer belt 1, and the flat nozzle 2 is revolved around a revolution axis approximately parallel to the ejection direction of the cooling water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cooling a kneaded material, in which raw material of a molding material is mixed and then heated and kneaded to cool a belt-shaped or sheet-shaped high-temperature resin kneaded material, and a cooling device therefor. It is a thing.

[0002]

2. Description of the Related Art A process of mixing a raw material of a molding material such as a thermosetting resin and then heating and kneading it to cool a high temperature resin kneaded material in a band shape or a sheet shape is performed in a molding material manufacturing step or the like. The kneaded high-temperature resin kneaded material is cooled and then pulverized and transferred to the next step.

To cool such a high temperature band-shaped or sheet-shaped resin kneaded product, a cooling device as shown in FIGS. 11 to 14 has been conventionally used.

In this cooling device, the conveyor belt 1 made of a material having a high thermal conductivity such as stainless steel is used for the rolls 8 and 9
A conveyor device is constructed by being hung between them, and this conveyor belt 1 is provided so as to be introduced into the cooling chamber 5 from one end in the cooling chamber 5 and led out from the other end of the cooling chamber 5. In the cooling chamber 5, a full cone nozzle, a hollow cone nozzle or the like is arranged as a nozzle 31 for injecting cold water on the lower surface side of the conveyor belt 1, and the plurality of nozzles 31 are arranged along the conveying direction of the conveyor belt 1. Individually arranged, the cold water is jetted upward, that is, toward the lower surface of the conveyor belt 1. A cold air supply pipe 3 is connected to the upper surface of the cooling chamber 5, and the main cold air pipe 3a connected to the air conditioner is branched into a plurality of branched cold air pipes 3b. The branched cold air pipes 3b are connected to the cooling chamber 5 at a plurality of locations along the conveying direction of the cooling chamber 5 conveyor belt 1. In the vicinity of the opening of the branched cold air tube 3b in the cooling chamber 5, a fan 3 for sending the cool air supplied from the branched cold air tube 3b toward the resin kneaded product.
2 are provided respectively. An exhaust pipe 4 is connected to the cooling chamber 5.

In the conventional cooling device as described above, first, the resin-kneaded product of the thermosetting resin composition that has been heat-kneaded is arranged on the upper surface of the conveyor belt 1 in a belt shape or a sheet shape, and the conveyor belt 1 is driven. The resin kneaded material is conveyed into the cooling chamber 5 and the cold water is jetted from the nozzle 31 toward the lower surface of the conveyor belt 1 to cool the resin kneaded material via the conveyor belt 1. The resin kneaded material is further cooled by sending cold air from the cold air supply pipe 3 into the chamber 5.

[0006]

However, the full cone nozzle and the hollow cone nozzle, which are the nozzles 31 for injecting cold water in the conventional cooling device as described above, are for ejecting cold water in an umbrella shape. The injection area is circular,
A large amount of cold water is injected at the outer edge of this injection area,
On the inner side, the injection amount becomes small, and the injection amount of cold water becomes non-uniform, and the cooling efficiency by cold water is low. Therefore, the cooling efficiency of the resin kneaded product was low.

On the other hand, in a nozzle called a flat nozzle in which the shape of the injection area is an elliptical shape, the injection amount in the injection area of the cold water is uniform and the cooling efficiency in the injection area is high. As compared with the nozzle and the hollow cone nozzle, the injection area of the cold water becomes extremely small, and it becomes impossible to widely inject the cold water to the lower surface of the conveyor belt 1, and as a result, the resin kneaded product cannot be sufficiently cooled. Therefore, conventionally, the flat nozzle has not been adopted.

The present invention has been made in view of the above points, and a flat nozzle is adopted as a nozzle for jetting cold water, and the flat nozzle can jet cold water over a wide range on the lower surface of the conveyor belt. It is an object of the present invention to provide a cooling method and a cooling device for a resin kneaded material, which is capable of sufficiently cooling the resin kneaded material.

[0009]

According to a first aspect of the present invention, there is provided a method for cooling a resin kneaded material, which conveys the resin kneaded material on the conveyor belt 1 while holding the resin kneaded material on the upper surface of the conveyor belt 1. Meanwhile, cold water is jetted from the flat nozzle 2 toward the lower surface of the conveyor belt 1 below the resin kneaded product via the conveyor belt 1, and the flat nozzle 2 revolves around an axis of revolution substantially parallel to the jet direction of cold water. It is characterized by that.

A cooling device for a resin kneaded material according to a second aspect of the present invention includes a conveyor belt 1 for conveying the resin kneaded material while holding the resin kneaded material on the upper surface, and a conveyor belt 1.
And a plurality of cold water jetting flat nozzles 2 arranged along the conveying direction of the resin kneaded product on the lower surface side of the flat kneading machine. The flat nozzles 2 jet cold water toward the lower surface of the conveyor belt 1 and cool water. It is characterized in that it is formed such that it can revolve around an orbital axis that is substantially parallel to the injection direction.

According to a third aspect of the present invention, in the second aspect, the flat nozzle 2 is formed so as to be capable of revolving around a revolution axis inclined with respect to the vertical direction.

Further, the invention of claim 4 is characterized in that in claim 2 or 3, it comprises a dry cold air generator for sending dry cooling air around the resin kneaded material conveyed by the conveyor belt 1. To do.

According to a fifth aspect of the present invention, in the fourth aspect, the cooling chamber 5 is connected to the exhaust pipe 4 and the cold air supply pipe 3 through which the dry cooling air supplied from the dry cold air generator flows.
The conveyor belt 1 is formed so that the resin kneaded material is introduced into the cooling chamber 5 from one end side and is discharged from the other end side, and the flat nozzle 2 is arranged in the cooling chamber 5 of the conveyor belt 1. 5. The resin kneaded product cooling device according to claim 4, wherein the cooling device is arranged so as to spray cold water toward the portion where the resin kneaded product is provided.

According to a sixth aspect of the present invention, in the fifth aspect, the inside of the cooling chamber 5 is divided into a plurality of compartments 6 arranged in the substrate transport direction, and the cold air supply pipes 3 are connected to the respective compartments 6. It is characterized by that.

The invention of claim 7 is any one of claims 2 to 6, wherein the conveyor belt 1 has a rotary shaft on the upper surface side which is orthogonal to the conveying direction of the conveyor belt 1 and faces the upper surface of the conveyor belt 1. It is characterized in that a pressure roll 7 biased by the pressure roller is arranged.

Further, the invention of claim 8 is characterized in that, in the invention of claim 7, a water passing mechanism for passing cold water is provided inside the pressing roll 7.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

1 to 4 show an example of the structure of a cooling device. In FIG. 1, the configurations of a pressing roll 7 and a cooling chamber 5 described later are omitted, and in FIG. 3, the configuration of a cooling water delivery device described later is omitted.

This cooling device is provided with a conveyer constituted by a conveyor belt 1. In this conveyer, two parallel and parallel rolls 8 are provided on the start side and the end side of the cooling device, respectively. , 9, the conveyor belt 1 is suspended. One of the two rolls 8 and 9 is a drive roll 9 to which a drive force is transmitted from a drive device 10 such as a motor and is rotationally driven. The conveyor belt 1 is driven by the rotary drive force of the drive roll 9. The conveyor belt 1 is made of a material having high thermal conductivity such as stainless steel. The upper side of the conveyor belt 1 is a forward path and the lower side is a return path. When the conveyor belt 1 is rotated by a driving device, the conveyor belt 1 is conveyed from the starting end side to the ending side in the forward path. A plurality of support rolls 11 that support the conveyor belt 1 are provided in parallel and in parallel on the lower surface side of the outward path of the conveyor belt 1.

The cooling chamber 5 includes a pair of rolls 8 and 9 of the transfer device.
Between the cooling chamber 5 and the other end of the cooling chamber 5 after being introduced from one end of the cooling chamber 5 into the cooling chamber 5 on the outward path. Is derived from.

The inside of the cooling chamber 5 is formed as an air cooling chamber 5a on the upper side of the outward path of the conveyor belt 1 and is formed as a water cooling chamber 5b on the lower side. Here, from the inner surface of the cooling chamber 5, the shield plate 23 obliquely extended downward from the diagonally upper side of the conveyor belt 1 toward the upper side of the side edge of the conveyor belt 1 and the diagonal side of the conveyor belt 1 A shield plate 23 extending obliquely upward from a lower side to a slightly lower side edge of the conveyor belt 1 is provided, and a side edge of the conveyor belt 1 on the outward path is provided with these two shield plates 23, 3.
It is designed to be arranged between the leading edges of the three. As a result, inside the cooling chamber 5, the conveyor belt 1 and the shielding plate 2
It is divided by 3 and 33 into an air cooling chamber 5a and a water cooling chamber 5b.

In the water cooling chamber 5b in the cooling chamber 5, a cold water injection device is arranged on the lower surface side of the outward path of the conveyor belt 1. This chilled water injection device includes a main chilled water pipe 12 which is long on the lower surface side of the conveyor belt 1 in the conveying direction of the conveyor belt 1.
a and a cold water supply pipe 12 including a plurality of branch cold water pipes 12b branched from the main cold water pipe 12a, and a branch cold water pipe 12b
And an injection unit 13 provided at the tip of the.

A plurality of branch chilled water pipes 12b are extended toward both sides of the main chilled water pipe 12a, whereby a plurality of jetting parts 13 are provided in two rows along the conveying direction of the conveyor belt 1. ing. A supply pipe 12c for supplying cold water to the main cold water pipe 12a is connected to the main cold water pipe 12a. Although not shown, the supply pipe 12c is connected to a cooling water delivery device that cools the water and supplies the cold water to the supply pipe 12c at a constant flow pressure.

The injection unit 13 has a rotating body 14 which rotates about a vertical rotation axis at the tip of the branch cold water pipe 12b.
And two connecting pipes 15 protruding from the rotating body 14 in a direction substantially orthogonal to the rotation axis, and a flat nozzle 2 for cold water injection provided at the tip of each connecting pipe 15. The two connecting pipes 15 extend from the rotating body 14 in opposite directions, and the two connecting pipes 15 are substantially straight. Therefore, a pair of flat nozzles 2
Is revolvable around the rotation axis of the rotating body 14 when the rotating body 14 rotates. The flat nozzle 2 is a branched cold water pipe 1 through the inside of the connecting pipe 15 and the rotating body 14.
2b, and is open upward, that is, toward the lower surface of the conveyor belt 1 in the outward path.

The flat nozzle 2 for jetting cold water has a major axis (or longitudinal direction) dimension and a minor axis (longitudinal direction) orthogonal to this major axis dimension such that the nozzle opening shape is oval, elliptical, cat's eye shape or the like. Alternatively, in the present invention, it is preferable that the ratio of the minor diameter (shorter direction) dimension r of the nozzle opening to the major diameter (longitudinal direction) dimension R is larger. r: R = 1: 3
It is preferable to use one having a range of ˜1: 5 and a minor axis (transverse direction) dimension of 1.0 to 10.0 mm.

Further, in this flat nozzle 2, the major axis (longitudinal) direction of the opening is aligned with the diametrical direction of the revolution path of the flat nozzle 2, that is, the major axis (longitudinal) direction is the connecting pipe 1.
5 is formed so as to be parallel to the longitudinal direction of the flat nozzle 2 and the area of cold water jetted from the flat nozzle 2 on the lower surface of the conveyor belt 1 when the flat nozzle 2 revolves is increased.

The spraying unit 13 revolves the flat nozzle 2 by rotating the rotating body 14 when the cold water is sprayed from the flat nozzle 2, and in order to rotate the rotating body 14 at this time. Can be provided with a motor or the like as its drive source.

Further, as shown in FIG. 5, the opening direction of at least one of the two flat nozzles 2 in the injection part 13 is inclined in the tangential direction of the revolution orbit with respect to the upward direction parallel to the revolution axis direction. If formed, flat nozzle 2
From above, cold water will be jetted from the upward direction of the revolution axis in the direction inclined to the tangential direction of the revolution orbit,
Therefore, the flat nozzle 2 can be revolved by the injection pressure of cold water. In this case, the flat nozzle 2 can be revolved without providing a drive source such as a motor. In the illustrated example, the opening directions of the two flat nozzles 2 are respectively inclined in the opposite directions to the upward direction parallel to the revolution axis direction in the tangential direction of the revolution trajectory.

Further, by making the opening diameters of the two flat nozzles 2 provided in the jetting section 13 different, it is possible to make the jetting amount of the cold water in each flat nozzle 2 different and make the jetting jet diameters jetted different. Therefore, the rotation can be smoothed and the cooling efficiency can be improved. At this time, the nozzle opening having a small diameter has a minor axis (transverse direction) dimension r of 1 to 3 mm and a major axis (longitudinal direction) dimension R of 2.5 to 5.9 mm. It is preferable that the dimension in the hand direction is 2 to 5 mm and the dimension in the major axis (longitudinal direction) is 5 to 15 mm.

Further, as shown in FIG.
It is also preferable that the whole is provided so as to be inclined inward. That is, the rotary shaft of the rotary body 14 is slightly inclined with respect to the vertical direction so that the upper side is inward and the lower side is outward, and the rotary body 14 is formed so as to rotate about this rotary axis. Each connecting pipe 15 extends from the rotating body 14 in a direction orthogonal to this rotation axis, and the flat nozzle 2 is opened parallel to this rotation axis (that is, in a direction inclined from the vertical direction) toward the upper side. To form. By doing so, the injection area of the cold water from the flat nozzle 2 on the lower surface of the conveyor belt 1 when the flat nozzle 2 revolves has an elliptical shape that spreads inward more than when the injection portion 13 is not inclined. Therefore, the injection area becomes larger. Here, the injection area can be widened even if the size between the flat nozzle 2 and the lower surface of the conveyor belt 1 is increased, but the injection area is formed by inclining the injection section 13 as described above. Wider, flat nozzle 2 and conveyor belt 1
Even if the dimension between the lower surface and the lower surface is limited by design, the injection area can be widened, and the device configuration can be made compact.

In addition, above the conveyor belt 1 on the outward path, the pressing roll 7 is provided closer to the starting end side of the apparatus than the cooling chamber 5.
Is provided. The pressing roll 7 has a horizontal rotation axis that is substantially orthogonal to the conveying direction of the conveyor belt 1, and is urged downward, that is, toward the upper surface of the conveyor belt 1.

The pressing roll 7 has a structure called a flatting roll as shown in FIGS. In the illustrated example, the rotary shaft bodies 16 extend from both ends of the pressing roll 7 in the rotary shaft direction, and the rotary shaft bodies 16 are rotatably supported by the shaft support bodies 17, respectively. Each shaft support 17 is attached to a frame 18.

The pedestal 18 is composed of a leg portion 19 and a pedestal portion 20 provided at the upper end of the leg portion 19. Base 2
A support base 22 is erected upward from the upper surface of 0, and a linear motion guide 21 (LM guide) that supports the shaft support 17 so as to be vertically movable is provided on the support base 22. . Further, on the support base 22 below the shaft support 17,
A vertical elevating rod 23 is provided. The elevating rod 23 is formed so as to be vertically movable with its lower end penetrating the support base 22. Further, a brim-shaped pressing rib 25 is provided on the upper end portion of the elevating rod 23. A coil spring 24 is arranged on the outer peripheral side of the elevating rod 23 so as to spirally surround the elevating rod 23. The coil spring 24 has an upper end abutting the pressing rib 25 and a lower end of the support 22. It comes in contact with the upper surface.

The pressing roll 7 configured as described above can be moved up and down in the vertical direction while being urged downward by its own weight, and when the resin kneaded material is not placed on the conveyor belt 1, the conveyor belt 1 is moved. The belt 1 comes into contact with the upper surface of the belt 1 while applying downward biasing force, and when the resin kneaded material is arranged on the upper surface of the conveyor belt 1, it comes into contact with the upper surface of the resin kneaded article downwardly while applying biasing force.
Further, at this time, the upper end of the elevating rod 23 comes into contact with the lower end of the shaft support 17, so that the coil support 24 applies an upward elastic biasing force to the shaft support 17,
The downward biasing force of the pressure roll 7 is adjusted.

A cylinder 26 is provided on the support base 22 below the shaft support 17. The cylinder 26 has a vertical plunger 27, and is formed so that the plunger 27 can be moved up and down by driving the cylinder 26. The upper end of the plunger 27 is normally arranged at a position spaced downward from the shaft support 17, and when the cylinder 26 is driven, the plunger 27 moves upward and the upper end of the plunger 27 moves.
7 abuts on the lower end of the shaft 7, and further moves upward in this state
Is moved upwards, whereby the pressing roll 7 is moved upwards. The cylinder 26 is provided for driving the maintenance roll of the apparatus to separate the pressing roll 7 upward from the conveyor belt 1. When the resin kneaded product is cooled, the cylinder 26 is provided with a plunger 27.
Is kept apart from the shaft support 17.

The pressing roll 7 is formed in a hollow shape as shown in FIG. Further, the rotary shaft bodies 16 at both ends are also formed in a hollow cylindrical shape, and the inner hollow portion is formed so as to communicate with the pressing roll 7 and open to the outside at the tip end portion of the rotary shaft body 16. A rotary joint 28 (rotating joint) is provided on each of the rotary shaft bodies 16 at both ends.
Are connected in communication, and each rotary joint 28
The inside of the pressing roll 7 and the running water pipe (not shown) are connected to each other via the. Here, the rotary joint 28 (rotary joint) is a pipe joint used to connect the tubular bodies that relatively rotate relative to each other, and it is possible to use an appropriate one having a generally-used conventional configuration. it can.

Then, cold water is supplied into the pressing roll 7 from the flowing water pipe connected to the one rotary joint 28, and the cold water is discharged from the flowing water pipe connected to the other rotary joint 28 so that the pressing roll 7 is discharged. The resin kneaded product can be cooled by passing cold water through the inside and pressing the resin kneaded product with the pressing roll 7 cooled by the cold water.

A dehumidifying cool air device (not shown) for sending dry cooling air into the cooling chamber 5 is connected to the cooling chamber 5 via the cold air supply pipe 3. As this dehumidifying cool air device, an appropriate air conditioner that cools air and dehumidifies and sends it out can be applied.

The cold air supply pipe 3 is composed of a main cold air pipe 3a whose upstream side is connected to a dehumidifying cold air device, and a plurality of branched cold air pipes 3b branched from the downstream side of the main cold air pipe 3a. The branched cold air pipes 3b are connected to the inside of the cooling chamber 5 on the upper surface of the cooling chamber 5, and the connection positions of the branched cold air pipes 3b are arranged from the starting end side to the terminating end side of the cooling chamber 5. The main cold air tube 3
An axial fan 30 is disposed in a, and by driving the axial fan 30, the dry cooling air supplied from the dehumidifying cool air device to the cold air supply pipe 3 has a sufficient air volume to cool the cooling chamber 5. It is designed to be sent inside.

In the air-cooling chamber 5a of the cooling chamber 5, a plurality of compartments 6 (6a, 6b, 6c, 6a, 6b, 6c
6d, 6e), and the branched cold-air tube 3b described above.
Are connected to each of the sub-compartments 6 except the sub-compartment 6e located closest to the terminal end. Further, the exhaust pipe 4 is connected to the upper surface of the compartment 6e arranged on the most end side.

In the air-cooling chamber 5a of the cooling chamber 5, a branch chamber 6
A baffle plate 29 for partitioning the space is provided. This baffle 2
9 is arranged so as to partition the compartments 6 above the upper surface of the conveyor belt 1, and a gap is provided between the upper surface of the conveyor belt 1 and the lower end of the baffle plate 29.

When cooling the high-heat band-shaped or sheet-shaped resin kneaded product after heating and kneading using the cooling device configured as described above, first, the band-shaped or sheet-shaped resin kneaded product is used. Is supplied to the upper surface of the conveyor belt 1 at the starting end side thereof, and the conveyor belt 1 is driven while the resin kneaded material is held on the upper surface of the conveyor belt 1. At this time, cold water is injected from the flat nozzle 2 by supplying cold water to the supply pipe 12c of the cold water injection device, and by driving the dehumidifying cool air device and the axial fan 30, the cold air supply pipe 3 is introduced into the cooling chamber 5. Deliver dry cooling air.

When the apparatus is driven in this way, the resin kneaded material first passes through the pressure roll 7 when passing through the pressure roll 7.
It is pressed by the downward urging force from and is brought into close contact with the conveyor belt 1. Next, the resin kneaded product is cooled in the cooling chamber 5.
Be transported inside. At this time, the rotary joint 28
When cold water is passed through the pressure roll 7 through the pressure roller 7, the cooled pressure roll 7 is brought into contact with the resin kneaded material to precool the resin kneaded material, thereby improving the cooling efficiency of the resin kneaded material by the cooling device. It can be further improved.

In the cooling chamber 5, the flat nozzle 2 sprays cold water toward the lower surface of the conveyor belt 1 to cool the conveyor belt 1, whereby the resin placed in close contact with the upper surface of the conveyor belt 1. The kneaded product is cooled while being transported in the cooling chamber 5.

At this time, by adopting the flat nozzle 2, the cooling efficiency by the injected cold water becomes high. In addition, the plurality of spraying units 13 spray the cold water from the flat nozzle 2 while revolving the flat nozzle 2 by rotating the rotating body 14.
Therefore, the spraying area of the cold water sprayed from the flat nozzle 2 on the lower surface of the conveyor belt 1 is widened, and the resin kneaded material can be cooled in a wide range. Further, as described above, when the injection portion 13 is formed so as to be inclined inward, the injection area of the cold water can be made wider, and the resin kneaded material can be cooled in a wider range. is there.

The dry cooling air supplied into the cooling chamber 5 is sent from the upper surface side of the cooling chamber 5 toward the resin kneaded material,
The resin kneaded product is also cooled by this dry cooling air, and the resin kneaded product can also be dried by sending the dry cooling air toward the resin kneaded product. Furthermore,
The conveyor belt 1 is cooled by cold water in a water cooling chamber 5b which is separated from the air cooling chamber 5a in which the resin kneaded material is arranged in the cooling chamber 5, and the resin kneaded material is cooled by the cold water jetted from the flat nozzle 2. Although it does not absorb moisture, even if steam or water particles generated from the cold water jetted from the flat nozzle 2 enter the air cooling chamber 5a through the gap between the water cooling chamber 5b and the air cooling chamber 5a, the dry cooling air is used. Is sent toward the resin kneaded product to dry the resin kneaded product,
Moisture absorption of the resin kneaded material can be prevented.

At this time, each branch cold air pipe 3b of the cold air supply pipe 3
The dry cooling air supplied from the cooling chamber 5 into the respective compartments 6 of the cooling chamber 5 is sent downward around the cooling chamber 5 to be sent around the resin kneaded material, and the resin kneaded material is efficiently dried and cooled. To do. Further, the dry cooling air supplied to each of the compartments 6 flows into the adjacent compartments 6 through the gap between the upper surface of the conveyor belt 1 and the lower end of the baffle plate 29, and at this time, the conveyor belt 1 The contact efficiency between the dry cooling air and the resin kneaded product becomes high in the gap between the upper surface of the above and the lower end of the baffle plate 29, whereby the resin kneaded product can be dried and cooled more efficiently. is there. In addition, the dry cooling air sequentially flowing into the adjacent compartments 6 in this way is finally sent to the compartment 6e arranged at the most end side and then exhausted from the inside of the cooling room 5 through the exhaust pipe 4. It is a thing.

In cooling the resin kneaded material as described above, in order to sufficiently cool the resin kneaded material,
The temperature of the cold water jetted from the flat nozzles 2 of the jetting unit 13 is set in the range of 5 to 12 ° C., and the total jetting amount of the cold water jetted from all the flat nozzles 2 toward the lower surface of the conveyor belt 1 is 250 L / mim or more. It is preferable that
In this case, a cooling water delivery device having the ability to supply such cold water is connected to the supply pipe 12c of the cold water supply pipe 12.

In order to sufficiently cool the resin kneaded product and dry the resin kneaded product, the dry cooling air sent from the cold air supply pipe 3 to the cooling chamber 5 has a temperature of 10 to 10.
20 ° C., humidity 5 to 50%, and the delivery amount is 30 m ² /
It is preferably equal to or more than mim, and in this case, a dehumidifying cold air device having the ability to supply such cold air is connected to the cold air supply pipe 3.

The temperature of 80 ° C., which was heat-kneaded as described above,
When the resin kneaded product at 110 ° C. is cooled, the conventional FIG.
When the resin kneaded product is cooled by the cooling device as shown in FIG. 4, the atmosphere in the cooling chamber 5 has a temperature of 25 ± 5 ° C. and a humidity of 50 to 50 ° C.
It is about 70% RH, and the temperature of the resin kneaded product after cooling is 3
Although the temperature was about 0 to 35 ° C., if the resin kneaded product was cooled by the above cooling device, the atmosphere in the cooling chamber 5 was set to 15 ± 2 ° C., the humidity was 15 to 50% RH, and the cooling was performed. The temperature of the subsequent resin kneaded product can be set to about 20 to 25 ° C., and the cooling rate of the resin kneaded product can be remarkably improved as compared with the prior art, and the resin kneaded product can be sufficiently dried. It is a thing.

In the above device configuration, the cold air supply pipe 3
Is connected to the upper surface of each of the compartments 6 by a branch cold air tube 3b, and the dry cooling air supplied to each of the compartments 6 is the compartment 6 at the most end side.
Although the exhaust pipe 4 connected to e is collectively exhausted, the dry cooling air may be sent to the inside of the compartment 6 from the side of each compartment 6, and the exhaust pipe 4 is also composed of each compartment. 6
It may be provided for each.

For example, in the one shown in FIG. 10, the branch cold air pipe 3b of the cold air supply pipe 3 is provided with the branch chamber 6 provided closest to the start end side.
In a, it is connected to the side surface on the starting end side of the branch chamber 6, and at this time, the branch cold air pipe 3b is provided so as to be inclined so that the downstream side is directed obliquely downward, and the dry cooling air supplied from the branch cold air pipe 3b is fed to the conveyor belt 1. It is designed to be delivered toward the resin kneaded product. Further, in the compartments 6b, 6c ... Arranged on the end side from this, each baffle plate 29 for partitioning the compartments 6 is formed in a hollow shape, and the branch cold air tube 3b is arranged from the upper surface side of the cooling chamber 5 to the baffle plate. It connects so that it may connect in 29. An opening is formed in each baffle plate 29 toward the compartment 6 on the terminal side of the baffle plate 29, and fins 33 that are inclined obliquely downward are formed at the upper and lower edges of the opening. Further, the exhaust pipe 4 is connected to the upper surfaces of the respective compartments 6 on the terminal side thereof so as to communicate with each other.

In the structure shown in FIG. 10, in the compartment 6a formed at the most start end side, the dry cooling air flows in from the branch cold air tube 3b and is sent out from the side of the start end side of the compartment 6a toward the resin kneaded material. , Also exhausted from the terminal end side,
Inside, a flow is formed in which the dry cooling air flows from the starting end side toward the terminal end side while being in contact with the resin kneaded material. Further, in the other compartments 6b, 6c, ..., the dry cooling air supplied from the branch cold air pipe 3b into the baffle plate 29 is regulated in the distribution direction by the fins 33 from the opening of the baffle plate 29, and the branch chamber 6b.
.. are sent from the side of the starting end side of b, c ..... toward the resin kneaded product, and are exhausted from the terminal end side, and dry cooling air in the compartments 6b, c .. A flow is formed which is in contact with the kneaded product and flows. As a result, the dry cooling air efficiently contacts the resin kneaded material in each compartment 6, and the resin kneaded material can be efficiently dried and cooled.

[0054]

As described above, the method for cooling a resin kneaded material according to claim 1 of the present invention is such that the resin kneaded material is conveyed on the conveyor belt while the resin kneaded material is held on the upper surface of the conveyor belt, For injecting cold water from the flat nozzle toward the lower surface of the conveyor belt under the resin kneaded material via the conveyor belt and causing the flat nozzle to revolve around the revolution axis substantially parallel to the injection direction of the cold water,
The conveyor belt is cooled by the injection of cold water from the flat nozzle, which makes it possible to cool the resin kneaded material. At this time, the efficiency of cooling the resin kneaded material by the cold water injected by adopting the flat nozzle is improved. By improving the rotation of the flat nozzle, the injection area of the cold water sprayed from the flat nozzle on the lower surface of the conveyor belt is widened, and the resin kneaded product can be cooled in a wide range.

The cooling device for a resin kneaded material according to a second aspect of the present invention comprises a conveyor belt for conveying the resin kneaded material while holding the resin kneaded material on the upper surface, and a resin kneaded material on the lower surface side of the conveyor belt. It comprises a plurality of cold water jetting flat nozzles arranged along the conveying direction, and the flat nozzles jet cold water toward the lower surface of the conveyor belt and center around a revolution axis substantially parallel to the cold water jetting direction. In order to form an orbital motion, the conveyor belt is cooled by jetting cold water from the flat nozzle while conveying the resin kneaded material on the conveyor belt, whereby the resin kneaded material can be cooled at this time. By adopting a flat nozzle, the cooling efficiency of the resin kneaded material by the cold water jetted is improved, and the flat nozzle is revolved to revolve. Of cold water injected from the nozzle, the injection region of the lower surface of the conveyor belt is wide, in which a resin kneaded material can be extensively cooled.

Further, according to the invention of claim 3, in claim 2, since the flat nozzle is formed so as to be able to revolve around a revolution axis inclined with respect to the vertical direction, the flat nozzle between the conveyor belt and the flat nozzle is designed. Even when the size is limited, the injection area of the cold water from the flat nozzle on the lower surface of the conveyor belt when revolving the flat nozzle can be expanded to an elliptical shape to make the injection area larger, and the resin kneaded material can be spread over a wider area. It is possible to form a compact device structure while cooling over the entire length.

The invention of claim 4 is characterized in that, in claim 2 or 3, the resin kneaded product is provided with a dry cold air generator for sending dry cooling air around the resin kneaded product conveyed by the conveyor belt. The resin kneaded product can be further cooled by dry cooling air, and the resin kneaded product can be dried to prevent moisture absorption of the resin kneaded product due to injection of cold water from the flat nozzle.

According to a fifth aspect of the present invention, in the fourth aspect, there is provided a cooling chamber in which a cold air supply pipe through which dry cooling air supplied from the dry cold air generator flows and an exhaust pipe are connected, and the conveyor belt is The resin kneaded material is formed so as to be introduced into the cooling chamber from one end side and to be led out from the other end side, and the flat nozzle is configured to inject cold water toward a portion arranged in the cooling chamber of the conveyor belt. Therefore, the resin kneaded product can be cooled and dried more efficiently by generating an air flow of dry cooling air in the cooling chamber.

According to a sixth aspect of the present invention, in the fifth aspect, the cooling chamber is divided into a plurality of compartments arranged in the substrate transport direction, and a cold air supply pipe is connected to each compartment, so that each compartment is dried. The resin kneaded product can be cooled and dried more efficiently by generating an air flow of cooling air.

Further, the invention according to claim 7 is the method according to any one of claims 2 to 6, wherein the conveyor belt has a rotating shaft orthogonal to a conveying direction of the conveyor belt and is urged toward the upper surface of the conveyor belt. Since the pressure roll is arranged, the resin kneaded product can be pressed and brought into close contact with the upper surface of the conveyor belt by the pressure roll, and the resin kneading when cold water is sprayed from the flat nozzle toward the lower surface of the conveyor belt. The cooling efficiency of the product can be further improved.

According to the invention of claim 8, in claim 7, since a water-passing mechanism for passing cold water is provided inside the pressing roll, the pressing roll cooled with cold water is brought into contact with the resin kneaded product. The resin kneaded product can be pre-cooled, and the resin kneaded product can be cooled more efficiently.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of an embodiment of the present invention with a part omitted.

FIG. 2 is a plan view showing an example of an embodiment of the present invention.

FIG. 3 is a front view of the embodiment shown in FIG.

4 (a) is a side view of the embodiment shown in FIG. 2,
(B) is an enlarged view of part A of (a).

FIG. 5 is a front view showing the configuration of an injection unit.

FIG. 6 is a front view showing a configuration of a pressure roll.

FIG. 7 is a side view of the pressure roll shown in FIG.

FIG. 8 is a partial side view showing the operation of the pressure roll.

FIG. 9 is a cross-sectional view showing the structure of a pressure roll.

FIG. 10 is a partial schematic cross-sectional view showing another example of the embodiment of the present invention.

FIG. 11 is a schematic front view with one part omitted, showing an example of a conventional technique.

FIG. 12 is a plan view showing an example of a conventional technique.

13 is a front view of the embodiment shown in FIG.

14 (a) is a side view of the embodiment shown in FIG.
(B) is an enlarged view of part A of (a).

[Explanation of symbols]

1 conveyor belt 2 flat nozzle 3 Cold air supply pipe 4 exhaust pipe 5 cooling room 6-room 7 Press roll

Claims (8)

[Claims] 1. A flat nozzle facing the lower surface of the conveyor belt below the resin kneaded material via the conveyor belt while conveying the resin kneaded material on the conveyor belt while holding the resin kneaded material on the upper surface of the conveyor belt. A method for cooling a resin kneaded product, characterized in that cold water is jetted from the flat nozzle and the flat nozzle is revolved around an axis of revolution that is substantially parallel to the jet direction of cold water. 2. A conveyor belt for conveying the resin kneaded material while holding the resin kneaded material on the upper surface thereof, and a plurality of cold water jetting devices arranged on the lower surface side of the conveyor belt along the conveyance direction of the resin kneaded material. A resin kneading characterized by comprising a flat nozzle, the flat nozzle spraying cold water toward the lower surface of the conveyor belt and being capable of revolving around a revolution axis substantially parallel to the spray direction of the cold water. Cooling system for things. 3. The cooling device for a resin kneaded material according to claim 2, wherein the flat nozzle is formed so as to be capable of revolving around a revolving shaft inclined with respect to the vertical direction. 4. The cooling of the resin kneaded product according to claim 2 or 3, further comprising a dry cold air generator for sending dry cooling air around the resin kneaded product conveyed by a conveyor belt. apparatus. 5. A cooling chamber is provided in which a cooling air supply pipe through which dry cooling air supplied from a drying cold air generator flows and an exhaust pipe are connected, and a conveyor belt conveys a resin kneaded material from one end side of this cooling chamber. It is characterized in that it is formed so as to be introduced into the inside and led out from the other end side, and the flat nozzle is arranged so as to inject cold water toward the portion arranged in the cooling chamber of the conveyor belt. The cooling device for the resin kneaded material according to claim 4. 6. The cooling of the resin kneaded material according to claim 5, wherein the cooling chamber is divided into a plurality of compartments arranged in the substrate conveying direction, and each compartment is connected to a cold air supply pipe. apparatus. 7. The pressure roller, which has a rotary shaft orthogonal to the conveying direction of the conveyor belt and is biased toward the upper surface of the conveyor belt, is arranged on the upper surface side of the conveyor belt. Item 7. A cooling device for a resin kneaded material according to any one of items 2 to 6. 8. The cooling device for a resin kneaded material according to claim 7, wherein a water passing mechanism for passing cold water is provided inside the pressing roll.