JPS62158533A - Method for drying water passage of metal die - Google Patents

Abstract

PURPOSE:To completely dry the inner face of a water passage in short time by feeding the compressed air which was subjected to a temp. up by heating into the water passage of a metal die by passing the compressed air through the inner part of the heat exchanger for fooling which is used for the temp. control of warm water for a metal die temp. adjustment. CONSTITUTION:The warm water 10 inside the tank 9 subjected to a temp. control by the heat exchanger 7 for cooling or the heater 8 for heating is fed to the water passage of a metal die 1 via a pipe 11 by a pump 4, in using the metal die. In case of changing the metal die the valve 13 of the pipe 12 for compressed air feeding of a compressor is opened by closing the valve 3 at warm water discharging side, valves 5, 6 for cooling water feeding and discharging, and by opening the valve 15 at the heat exchanger 7 outlet side and the valve 17 of the warm water discharging pipe 16. The compressed air heated by the warm water 10 inside the heat exchanger 7 reaches to the water passage of the metal die 1 via pipes 14, 11 and dries the inner face completely in several minutes by blowing off the water of the inner part of the water passage. In this way the inner face of the watering aperture of the metal die can completely be dried in short time.

Description

[Detailed description of the invention] (a) Industrial application field The present invention enables water holes formed in a mold through which hot water for regulating mold temperature passes to be completely dried in a few minutes. , relates to a method for drying water holes in a mold.

(Example) Conventional technology and problems to be solved by the present invention Conventionally, when replacing a mold, if water remained in the water hole of the mold, the water would flow out and worsen the working environment. The mold was replaced after supplying compressed air from a compressor to the water hole and blowing out the water inside the water hole, but if only the water was blown away, water droplets still remained inside the water hole. These water droplets were the cause of rust and water stains.

(c) Means for Solving the Problems In view of the above, the present invention uses existing equipment and heat sources to completely dry the inner surface of the water hole economically and in a short time. A compressor is installed inside the cooling heat exchanger that is used to control the hot water for regulating the mold temperature to a set temperature, which is stored in the tank and passed through the water holes formed in the mold when the mold is in use. By passing the compressed air, the compressed air is heated and then supplied to the water hole, which blows away the water inside the water hole and completely dries it in a few minutes.

(D) Embodiments and Functions The embodiments of the present invention will now be described with reference to the drawings as follows.

That is, when the mold (1) is used, if the pump (4) is operated with the switching solenoid valve (3) provided on the hot water discharge side circulation pipe (2) open, the solenoid for supplying cooling water is activated. Valve (5)
and the cooling water discharge solenoid valve (6), and by passing the cooling water into the cooling heat exchanger (7) or by energizing the heating heater (8). The hot water (10) stored in the tank (9), which is controlled at a set temperature, is passed through the hot water supply side circulation pipe (11) by the pump (4) and then through the water passage hole formed in the mold (1) (as shown in the drawing). (not shown), and then the discharge side circulation vibrator (2)
The temperature of the mold (1) is adjusted to an appropriate temperature as it returns to the tank (9) through the Operate the switch provided in the above switching solenoid valve (3) and the cooling water supply i! Solenoid valve 5) and cooling water discharge solenoid valve (6)
At the same time, the solenoid valve (13) installed in the compressed air supply pipe (12) of the compressor connected to the cooling water supply side of the cooling heat exchanger (7) closes the cooling heat exchanger (7). ), a solenoid valve (15) provided on a pipe (14) connecting the cooling water discharge side and a hot water supply side circulation pipe (11), and a discharge connected to a hot water discharge side circulation vibrator (2). When the solenoid valve (17) provided on the pipe (16) is opened, the compressed air from the compressor that is supplied to the cooling heat exchanger (7) through the pipe (12) flows into the cooling heat exchanger (7). It is heated by the heat of the hot water (1o) while passing through the pipe (14) and the hot water supply side circulation pipe (11), and is supplied to the water passage hole of the mold (1), and passes through Furthermore, since the hot water is discharged to the outside through the discharge-side circulation vibrator (2) and the discharge pipe (16), the water inside the water hole of the mold (1) is blown away, and the inner surface is washed away in a few minutes. Since it dries completely, the work environment will not be degraded due to residual water flowing out from the water hole when replacing the mold, unlike conventional molds, and there is no risk of rust or limescale forming on the inner surface of the water hole. This allows molds to be stored and placed without any problems.

In addition, in the figure, (18) is an automatic water supply pipe, and (19)
is an automatic water supply solenoid valve provided on this automatic water supply pipe (18). Also, (a) is a check valve installed at a suitable location.

(E) Effects of the Invention As described above, the present invention has the hot water stored in the tank, and when the mold is used, the hot water for adjusting the mold temperature being passed through the water holes formed in the mold, to a set temperature. O? The compressed air of the compressor is heated by using the existing cooling heat exchanger used for cooling and the heat of the hot water for adjusting the mold temperature, which is kept at the set temperature when replacing the mold. It is extremely economical.

In addition, conventionally, since the cooling water passes through the inside of the cooling heat exchanger, limescale etc. tend to adhere to the inside, which tends to deteriorate the performance, but according to the method of the present invention, the mold can be replaced easily. Compressed air from the compressor passes through the inside of the cooling heat exchanger every time this is done, so even if limescale etc. occurs, it is removed by the compressed air, which prevents the performance of the cooling heat exchanger from deteriorating. It is possible.

However, since heated compressed air is supplied to the water holes in the mold, any water remaining inside the holes is blown away and the inner surface is completely dry within a few minutes, so it is not possible to use conventional methods. When replacing the mold, the work environment will not be degraded due to water remaining in the water hole and flowing out, and the mold can be stored without the risk of rust or limescale forming on the inner surface of the water hole. Since the drying method can be left in place, it has made a great contribution to the industry as a method for drying water holes in molds.

[Brief explanation of drawings]

The drawing is a circuit diagram showing the flow of compressed air when replacing molds. (1) in the figure is the mold. (7) is a cooling heat exchanger. (9) is a tank. (10) is hot water.

Claims (1)

[Claims] A compressor is installed inside the cooling heat exchanger, which is used to control the hot water for regulating the mold temperature to a set temperature, which is stored in the tank and passes through the water holes formed in the mold when the mold is used. By passing compressed air, the compressed air is heated and then supplied to the water hole, which blows away the water inside the water hole and dries the water hole of the mold completely in a few minutes. How to do it.