JPH08300198A - Release agent regenerating device - Google Patents

Abstract

PURPOSE: To prevent the explosive boiling of a used release agent when this used release agent is freshly introduced into an already heated heat treating vessel. CONSTITUTION: An opening/closing control valve 10 is disposed at a supply pipe 9 for supplying the used release agent contg. moisture to the heat treating vessel 1 and is provided with a controller 11 which closes this opening/closing control valve 10 when the temp. detected by a temp. sensor 9 disposed near the bottom of the heat treating vessel 1 attains the set temp. near the b.p. of the water or above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reclaiming a release agent used in a press machine or the like.

[0002]

2. Description of the Related Art Heretofore, an oil-based mold release agent containing graphite powder has been used in a pressing operation by a pressing machine. After releasing the work, the release agent is recovered.
At that time, since cooling water for press-type cooling is often mixed, it is necessary to dissipate the mixed water by heat treatment in order to regenerate it so that it can be reused. This regenerating is performed by the mold release agent regenerating apparatus having the heat treatment tank.

[0003]

In the conventional release agent regenerating apparatus, the used release agent is heated to about 110 ° C. in the heat treatment tank to remove water. However, when a new used release agent is introduced into the already heated heating tank in this way, the water contained in this new used release agent suddenly boils, and the release agent is removed. There is a risk of blowing out from the top of the heat treatment tank.

An object of the present invention is to prevent a mold release agent from explosively boiling when a new used mold release agent is introduced into a heating treatment tank which has already been heated. It is to provide an agent regeneration device.

[0005]

According to the present invention, the above problems can be solved as follows. In a mold release agent regenerating apparatus equipped with a heat treatment tank for heating a used mold release agent to evaporate the water contained in the mold release agent, the heat treated tank contains a used mold release agent containing water. An open / close control valve is provided in the supply pipe to be supplied, and the temperature detected by the temperature sensor provided in the heat treatment tank of the open / close control valve is slightly lower than the boiling point of water and is equal to or higher than the set temperature. A control device was installed to close it at times.

[0006]

According to the present invention, when the temperature of the inside of the heat treatment tank rises to a set temperature slightly lower than the boiling point of water, the opening / closing control valve provided in the supply basket automatically supplies the used release agent. Closed, and the supply of the used release agent containing water to the heat treatment tank is stopped, so that there is no possibility of sudden boiling of the water.

[0007]

EXAMPLE The release agent regenerating apparatus shown in FIG. 1 has a heat treatment tank (1) having a heating device (not shown). A used release agent (2) is accommodated in the heat treatment tank (1), and a pyramidal duct (3) for discharging water as water vapor is formed in the upper portion. Reference numeral (4) is an observation window provided in the duct (3). Used release agent (2) in heat treatment tank (1)
Is, for example, with the agitator supplied to the level shown.
While being stirred by (5), it is heated to a temperature of about 110 ° C. to remove water.

The release agent thus completely regenerated by removing the water content is operated by operating the pump (7).
It is taken out by (6).

The used release agent to be regenerated next is supplied from the supply pipe (8) into the heat treatment tank (1).
When the mold release agent (2) remaining in the heat treatment tank (1) is at a high temperature, the water contained in the newly supplied mold release agent explosively boils, so that the upper part (3) There is a danger that the liquid will blow out.

According to the present invention, the temperature sensor (9) is arranged near the bottom of the heat treatment tank (1) and the supply pipe (8) is provided.
An on-off control valve (10) is provided in the control valve (10), and the on-off control valve (10) is controlled by a control device (11) which receives a signal from a temperature sensor (9). That is, when the temperature detected by the temperature sensor (9) becomes equal to or higher than the set temperature set slightly lower than the boiling point (100 ° C.) of water such as 90 ° C., the opening / closing control valve (10) causes the supply pipe
(8) is closed and a new used release agent is the heat treatment tank.
(1) The temperature is set to 90 ° C so that it is not supplied inside.
Only when the temperature is lower, the open / close control valve (10) is opened so that a new used release agent can be supplied into the heat treatment tank (1).

[0011]

With the above-described structure, the supply of new used release agent is performed below the set temperature close to the boiling point of water, so that explosive boiling is reliably prevented.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic front view of an embodiment of a release agent reproducing apparatus of the present invention.

[Explanation of symbols]

 (1) Heat treatment tank (2) Release agent (3) Duct (4) View window (5) Stirrer (6) Extraction pipe (7) Pump (8) Supply pipe (9) Temperature sensor (10) Open / close control Valve (11) Controller

Claims (1)

[Claims] 1. A mold release agent regenerator comprising a heat treatment tank for heating a used mold release agent to evaporate the water contained in the mold release agent, wherein the heat treatment tank contains water. An open / close control valve is installed in the supply pipe that supplies the used release agent, and this open / close control valve is
A releasing agent regenerating apparatus provided with a control device for closing the temperature detected by a temperature sensor arranged in the heat treatment tank when the temperature exceeds a set temperature set slightly lower than the boiling point of water. .