JPH0691644A - Device for solidifying thermosetting resin by cooling - Google Patents

Abstract

PURPOSE:To easily control supply quantity of resin liquid and enable unmanned operation by automatic control of supply of the resin liquid. CONSTITUTION:A device comprises a cooling drum 2 to be rotated having a cooling means inside thereof, a rolling roll 3 to be rotatably brought into contact with the periphery of the cooling drum 2 for rolling a resin liquid 1 supplied on the periphery of the cooling drum 2 to make it thin so as to stick to the periphery of the cooling drum 2, a resin liquid supply pipe 14 for supplying the resin liquid 1 having high temperature on the periphery of the cooling drum 2 between the rolling roll 3 and the top end of the cooling drum 2, and a level sensor 18 arranged on the upper part of the cooling drum 2 for detecting level of the resin liquid 1 retained on the periphery of the cooling drum 2 between the rolling roll 3 and the top end of the cooling drum 2. A supplying quantity of the resin liquid 1 can be shown in accordance with the level of liquid face to be detected by the level sensor 18.

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 and solidifying a thermosetting resin in a process for producing a thermosetting resin such as phenol resin or melamine resin.

[0002]

2. Description of the Related Art For example, for a phenol resin, a resin liquid 1 is prepared as a syrup-like initial condensate by charging phenol and formalin in a reaction vessel and heating them to react with each other. It is manufactured by cooling the liquid 1 with the cooling drum 2 and solidifying it.

The cooling drum 2 is formed of a metal cylindrical body or the like, and is rotatably driven while being cooled by showering cooling water on its inner surface. As shown in FIG. On the outer periphery of the rolling roll 3 at a position displaced from the upper end of the cooling drum 2 in the rotation direction of the cooling drum 2.
Are arranged in rolling contact with each other, and the high temperature resin liquid 1 is supplied from the resin supply pipe 14 to a portion between the rolling roll 3 and the upper end of the cooling drum 2. Further, as shown in FIG. 4B, a pair of left and right damming plates 16 are provided at the location of the rolling roll 3, and the resin liquid 1 supplied to the cooling drum 2 is cooled by the cooling drum 2.
So that it doesn't overflow from the side edges. In this case, the high temperature resin liquid 1 is supplied from the resin supply pipe 14 to the cooling drum 2.
Is supplied to the central portion in the width direction of the
Is rolled and thinly spread and attached to the outer periphery of the cooling drum 2, and the resin liquid 1 is cooled and solidified by the cooling drum 2. The solid resin is separated from the cooling drum 2 by a scraper or the like and is then crushed by a crusher or the like. Be crushed.

When the resin liquid 1 is supplied from the resin supply pipe 14 to the cooling drum 2 as described above, the supply amount is adjusted using a flow meter or the like.

[0005]

However, since the resin liquid 1 has a high viscosity and its viscosity changes greatly depending on its temperature, it is difficult to control the supply amount by using a flow meter, etc. When measuring with a meter that is in direct contact with the resin liquid 1 like a meter, maintenance is required due to the adhesion of the curable resin liquid 1, and unattended operation by automatic control of the supply of the resin liquid 1 is possible. It was difficult to realize.

The present invention has been made in view of the above points, and a thermosetting resin in which the control of the supply amount of the resin liquid is facilitated and the unmanned operation by the automatic control of the supply of the resin liquid becomes possible. An object of the present invention is to provide a cooling and solidifying device.

[0007]

The apparatus for cooling and solidifying thermosetting resin according to the present invention includes a cooling drum 2 provided with cooling means 4 therein and driven to rotate, and a rotation of the cooling drum 2 from the upper end of the cooling drum 2. Cooling drum 2 at a position displaced in the direction
Between the rolling roll 3 and the upper end of the cooling drum 2 and the rolling roll 3 for rolling the resin liquid 1 thinly rolled on the outer periphery of the cooling drum 2 and attached to the outer periphery of the cooling drum 2. At the location, the resin liquid supply pipe 14 for supplying the high temperature resin liquid 1 to the outer periphery of the cooling drum 2 and the rolling roll 3
And a liquid level sensor 18 for detecting the liquid level of the resin liquid 1 staying on the outer periphery of the cooling drum 2, the liquid level sensor 18 being disposed above the cooling drum 2 between the upper end of the cooling drum 2 and the upper end of the cooling drum 2. It is a feature.

[0008]

By detecting the liquid level of the resin liquid 1 staying on the outer periphery of the cooling drum 2 with the liquid level sensor 18, the supply amount of the resin liquid 1 according to the liquid level can be known.
It is possible to manage the supply amount of the resin liquid 1 by detecting the supply amount of the resin liquid 1 without having to directly contact the resin liquid 1.

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples. The cooling drum 2 is formed in a cylindrical shape with a hollow inside and openings on both side surfaces closed, and is made of a metal having excellent thermal conductivity. This cooling drum 2 is arranged in a casing 8 as shown in FIG. 2A, and is rotatable by pivotally supporting a rotating shaft 9 projecting in the center of both side surfaces of the cooling drum 2 through the casing 8. The cooling drum 2 is supported by the motor and is rotatably driven by the power of an electric motor or the like. A cooling pipe 10 is disposed in the cooling drum 2 through the hollow rotating shaft 9 and is cooled by spraying cooling water from a nozzle 11 of the cooling pipe 10 onto the inner peripheral surface of the cooling drum 2. The drum 2 is cooled from the inner surface. The cooling means 10 is formed by the cooling pipe 10 provided with the nozzle 11, and the cooling drum 2 is cooled so that the surface temperature thereof becomes 20 to 30 ° C.

The rolling roll 3 is provided with a heating means such as a heater inside and the surface temperature of the rolling roll 3 is about the same as that of the resin liquid 12.
It is formed so as to be heated to 0 to 130 ° C., and the rotary shafts 12 at both ends thereof are pivotally supported by passing through the casing 8 and are brought into close proximity to the surface of the cooling drum 2 by the power of an electric motor or the like and driven to roll. I am allowed to do it. As shown in FIG. 2A, the rolling roll 3 is disposed on the upper part of the outer periphery of the cooling drum 2 at a position offset from the upper end in the rotation direction side of the cooling drum 2.

A resin supply pipe 14 is introduced into the casing 8 through the ceiling surface, and a resin distribution pipe 15 formed of an elongated pipe is connected to the lower end of the resin supply pipe 14. The resin distribution pipe 15 is provided with a large number of resin outlets (not shown) on its lower surface at regular intervals along the longitudinal direction,
The resin distribution pipe 15 is horizontally arranged immediately above the upper end of the cooling drum 2 such that its longitudinal direction is parallel to the axial direction of the cooling drum 2. It is preferable to separate the resin distribution pipe 15 from the rolling roll 3 as far as possible to the side opposite to the rotation direction of the cooling drum 2, but in order to prevent the resin liquid 1 from flowing out in the direction opposite to the rotation direction of the cooling drum 2, It is preferable to arrange it just above the uppermost end.

Further, from the outer circumference of the rolling roll 3 to the outer circumference of the cooling drum 2, between the respective side end portions thereof, as shown in FIG.
As shown in (a), the damming plate 16 is disposed and fixed, and the lower end surface of the damming plate 16 is formed into an arcuate surface having the same curvature as that of the outer circumference of the cooling drum 2 to form the outer circumferential surface of the cooling drum 2. In addition to being in close contact with each other, one side end surface of the damming plate 16 is formed into an arc surface having the same curvature as the outer peripheral curvature of the rolling roll 3, and is brought into close contact with the outer peripheral surface of the rolling roll 3 to be in sliding contact therewith. is there.
The pair of blocking plates 16 and the rolling roll 3 form a resin reservoir 17 on the outer periphery of the upper end of the cooling drum 2.

A liquid level sensor 18 is arranged and mounted directly above the resin reservoir 17. As the liquid level sensor 18, a non-contact type sensor such as an ultrasonic level sensor, a radiation level sensor, a capacitance type sensor, a laser type sensor or the like can be used. Here, as shown in FIG. 1, the liquid level sensor 18 is electrically connected to the control device 23. Further, the resin supply pipe 14 led out from the resin liquid supply tank 22 is provided with an automatic valve 24 formed of an electromagnetic valve, an air opening / closing valve, a motor opening / closing valve or the like so that the supply amount of the resin liquid 1 can be adjusted. The automatic valve 24 can be opened and closed by remote control from the control device 23.

Then, the amount of 120-
The resin liquid 1 having a high temperature of about 130 ° C. is supplied to the resin liquid supply tank 22.
From the resin supply pipe 14 to the upper end of the outer circumference of the cooling drum 2. Since the resin distribution pipe 15 is provided with a large number of resin outlets 19 at equal intervals, the resin liquid 1 is uniformly distributed in the axial direction and supplied to the cooling drum 2 as shown in FIG. 2B. It The resin liquid 1 thus supplied to the cooling drum 2 is rolled by the rolling rolls 3 as the cooling drum 2 rotates.
Although it is made to flow to the side, after it stays in the resin pool 17 between the blocking plate 16 and the cooling drum 2, it passes between the rolling roll 3 and the rolling roll 3 while being rolled by the rolling roll 3. In this way, the resin liquid 1 that has passed through between the rolling rolls 3 and is thinly spread and adhered to the surface of the cooling drum 2 is cooled and solidified by the cooling drum 2, and the surface of the cooling drum 2 is solidified. Solid resin 1 cooled and solidified by
b is peeled by a scraper 20 arranged so as to be in sliding contact with the surface of the cooling drum 2, and the peeled solid flake piece 1c is provided at the lower end of the casing 8 for the crusher 2
It is roughly crushed into coarsely crushed pieces 1d.

When the resin liquid 1 is supplied from the resin supply pipe 14 to the cooling drum 2 as described above, the resin liquid 1 stays in the resin pool 17 and then passes between the resin liquid 1 and the rolling roll 3 to pass through the outer periphery of the cooling drum 2. Therefore, the amount of supply can be controlled by controlling the liquid level of the resin liquid 1 that stays at the liquid level sensor 18. That is, the liquid level of the resin liquid 1 staying in the resin reservoir 17 is always detected by the liquid level sensor 18, and the data of the liquid level is input to the arithmetic circuit unit 26 of the control device 23. Then, when the liquid level of the resin liquid 1 changes from the control standard of the liquid level calculated from the parameter constants managed by the equipment, this change is calculated by the arithmetic circuit unit 26, and the signal of the arithmetic data is sent to the controller 23. It is input to the control circuit unit 27, and based on this, the automatic valve 24 of the resin supply pipe 14 is controlled to open and close. Here, when the liquid level of the resin liquid 1 staying in the resin pool 17 is low, the supply amount of the resin liquid 1 is small, and when the liquid level of the resin liquid 1 staying in the resin pool 17 is high, the supply amount of resin liquid 1 is Therefore, when the liquid level detected by the liquid level sensor 18 decreases, control is performed to increase the valve opening amount of the automatic valve 24, and the supply amount of the resin liquid 1 by the resin supply pipe 14 is increased. When the liquid level is increased and the liquid level detected by the liquid level sensor 18 is increased, the opening amount of the automatic valve 24 is controlled to be small, and the supply amount of the resin liquid 1 through the resin supply pipe 14 is reduced. , The liquid level of the resin liquid 1 staying in the resin reservoir 17 is always stabilized, the supply amount of the resin liquid 1 to the cooling drum 2 is stabilized to an optimum condition, and the supply of the resin liquid 1 is automatically controlled to perform unattended operation. Drive It is capable to ability.

[0016]

As described above, according to the present invention, a liquid for detecting the liquid level of the resin liquid, which is arranged above the cooling drum at a position between the rolling roll and the upper end of the cooling drum and stays on the outer periphery of the cooling drum. Since it is equipped with a surface sensor, it is possible to know the supply amount of the resin liquid according to the liquid level of the resin liquid detected by the liquid level sensor. The amount of resin liquid supplied can be easily detected without the need for direct contact,
The amount of resin liquid supplied can be controlled by a liquid level sensor to enable unmanned operation.

[Brief description of drawings]

FIG. 1 is a schematic view of part of an embodiment of the present invention.

2 shows the same embodiment of the present invention, FIG.
(A) is a front sectional view and (b) is a partial side sectional view.

FIG. 3 is a block diagram of the control system of the above.

FIG. 4 shows a conventional example, in which (a) is a partial plan view and (b) is a partial front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin liquid 2 Cooling drum 3 Rolling roll 4 Cooling means 14 Resin supply pipe 18 Liquid level sensor

Claims (1)

[Claims] 1. A cooling drum provided with a cooling means inside and driven to rotate, and a cooling drum which is disposed on the outer circumference of the cooling drum at a position offset from the upper end of the cooling drum in the rotation direction of the cooling drum and is supplied to the outer circumference of the cooling drum. A rolling roll that thinly rolls the resin liquid and attaches it to the outer periphery of the cooling drum, and a resin liquid supply pipe that supplies the high temperature resin liquid to the outer periphery of the cooling drum at a position between the rolling roll and the upper end of the cooling drum. A liquid level sensor arranged above the cooling drum at a position between the rolling roll and the upper end of the cooling drum, the liquid level sensor detecting a liquid level of the resin liquid staying on the outer periphery of the cooling drum. Cooling and solidifying device for thermosetting resin.