KR101805718B1 - Circulating water pipe control device for injection mold and control method thereof - Google Patents

Abstract

The present invention relates to a circulating water pipe control device for an injection molding device. The circulating water pipe control device includes: a first air pipe (11) branching from an air pipe (10), and connected to a cooling water supply pipe (20); a second air pipe (12) discharging heating water and cooling water, remaining in a mold, through a cooling water discharge pipe (30) and a heating water discharge pipe (50); a first drain pipe (31) and a second drain pipe (51) connected to the cooling water discharge pipe (30) and the heating water discharge pipe (50) respectively; a first liquid pipe (32) and a second liquid pipe (52) installed between the cooling water discharge pipe (30) and the heating water discharge pipe (50) and a gas-liquid separator (70); a decompressing valve (250) controlling pressure of circulating water flowing in the cooling water discharge pipe and the heating water discharge pipe; a motor (230) controlling the decompressing valve (250); a main controller controlling the motor (230); a flowmeter (260) checking the rate of flow to the decompressing valve (250); a first pressure sensor (270a) measuring pressure of the rate of flow to the decompressing valve (250); a second pressure sensor (270b) measuring pressure of the rate of flow discharged from the decompressing valve (250); and a malfunction sensing part determining whether the decompressing valve (250), the flowmeter (260), the first pressure sensor (270a), or the second pressure sensor (270b) malfunctions or not.

Description

TECHNICAL FIELD [0001] The present invention relates to a circulating water pipe control apparatus for an injection mold apparatus,

The present invention relates to a circulating water pipe control apparatus for an injection mold apparatus, and more particularly, to a circulating water pipe control apparatus for an injection mold apparatus which discharges residual water remaining inside a mold during repair work of a mold or production of another product, The bubbles contained in the remaining water discharged from the mold are separated and discharged, so that the compressed air forming the bubbles can be circulated for recycling, and the cooling water and the heated water supplied along the cooling water supply pipe and the heated water supply pipe The present invention relates to a circulating water pipe control apparatus for an injection mold apparatus capable of supplying cooling water and heating water by adjusting a supply pressure and a supply amount of a mold to a suitable flow rate and an appropriate supply pressure suitable for a mold condition such as a mold size and a mold temperature.

Generally, a mold can be classified into an injection mold for producing a plastic (synthetic resin) product, a press mold for producing a product by using an iron plate, and a die casting mold for producing a metal by melting a metal. Among the molds, The temperature of the mold is a very important factor because the flow of the synthetic resin is very sensitive to the temperature of the mold in the molding work for the synthetic resin injection molding in which the molten injection material is filled between the respective molds at high pressure to produce the product according to the internal shape of the mold It is important to set the correct mold temperature and maintain the mold temperature to reduce the defect rate and to maintain the quality of the injection molding product. As an important factor to improve the quality of the molded product, the mold temperature Regulating devices have been developed.

Injection molding is a technique for producing a material such as a thermosetting resin or a thermoplastic resin into various types of injection molds. The injection molding process includes a metering process for metering the melted resin in the mold, an injection process for filling the molten resin in the mold, A cooling step of solidifying the filled resin, a mold opening step of opening the mold after cooling, and a taking out step of taking out the molded article formed in the mold.

On the other hand, the cooling process, which is a process for solidifying the resin after the injection process in the injection molding, is necessary to make the thermal conductivity of the mold uniform and improve the shape of the injection molded product.

As the cooling method, there are a medium cooling method in which cooling water flows inside the injection mold and a natural cooling method in which it is cooled naturally. The present invention relates to a medium cooling method, and Korean Patent Laid-Open Publication No. 10-2014-0022251 discloses a medium cooling method.

According to the prior art, defective products are mass-produced according to the temperature of the injection mold, and molding is performed at a temperature of 160 ° C or less at present, so that the maintenance cost is too large and the size of the equipment is inevitably increased.

Further, the molten synthetic resin is cooled in the process of filling the cavity of the injection mold, causing a lot of defects in the appearance of the injection-molded article, and the temperature distribution of the injection-molded article is uneven, have.

In addition, the cooling system of the injection mold according to the related art has a problem that the distance from the cooling tower to the injection mold is too far away from the cooling tower, the cooling device, the heating device, It is difficult to recover and it is composed of pipeline lines such as supply line and recovery line to overcome this.

Registration No. 10-1036548 (Temperature control system for injection mold and pressurizing device for injection mold) Open No. 10-2008-0024279 (temperature control device of injection mold) Open No. 10-2014-0106222 (Mold automatic thermostat for pure water supply ion exchange resin purification device for mold cleaning installed in water supply pipe)

The injection mold according to the prior art needs to be replaced according to the product to be produced. When replacing the mold, compressed air supplied through the air line for operation of the mold, cooling water supplied to the cooling line for cooling the mold, There is a problem that contamination is generated in the work place and the injection apparatus due to the leakage of the heated water or the like supplied in the number line to the outside in a state in which it remains in the mold.

In addition, the mold apparatus according to the related art has a problem in that it is difficult to shorten the time required for injection molding because a skilled technician can not handle it even if malfunction of the intermittent valves for controlling the piping lines occurs.

Further, in the mold apparatus according to the related art, since the operator must manually discharge the cooling water and the heating water remaining in the mold by using compressed air before replacing the mold, the preliminary preparation process performed before the mold work is complicated And it is difficult to reduce the time and cost required for the mold working.

Therefore, there is a need for improvement.

The present invention can prevent the environmental pollution of the workplace by discharging the remaining water remaining in the mold at the time of replacement work due to repairs of the mold or production of other products to the outside of the mold, The supply pressure and the supply amount of the cooling water and the heating water supplied along the cooling water supply pipe and the heating water supply pipe are adjusted to the mold state such as the size of the mold and the temperature of the mold And it is an object of the present invention to provide a circulating water pipe control apparatus for an injection mold apparatus capable of supplying cooling water and heating water by adjusting the flow rate to an appropriate flow rate and an appropriate supply pressure.

The present invention relates to an injection molding machine comprising an air tube (10) for supplying compressed air for operation of an injection mold apparatus, a cooling water supply pipe (20) for supplying cooling water for cooling the mold, a cooling water discharge pipe (30) , A heating water supply pipe (40) for supplying the heating water for preheating the mold, and a heating water discharge pipe (50) for discharging the heating water for which the preheating is completed, the circulating water pipe control device for the injection mold apparatus A first air pipe 11 branched from the cooling water supply pipe 20 and connected to the cooling water supply pipe 20; The cooling water supply pipe (20) is connected to the heating water supply pipe (40) so that the supply of air to the cooling water supply pipe (20) and the heating water supply pipe A second air pipe (12) for bypassing air through a supply pipe (40) to discharge remaining cooling water and heating water in the mold through the cooling water discharge pipe (30) and the heating water discharge pipe (50); A first drain pipe 31 and a second drain pipe 51 connected to the cooling water discharge pipe 30 and the heating water discharge pipe 50, respectively; A gas-liquid separator (70) installed in the first drain pipe (31) and the second drain pipe (51) and through which the remaining water flows; The gas separated from the gas-liquid separator 70 is discharged and the liquid is discharged to the cooling water discharge pipe 30 and the heating water discharge pipe 50 through the cooling water discharge pipe 30 and the heating water discharge pipe 50, A first liquid pipe (32) and a second liquid pipe (52) installed between the separator (70); A pressure reducing valve (250) for adjusting the pressure of the circulating water flowing in the cooling water discharge pipe and the heating water discharge pipe; An electric motor 230 installed on one side of the pressure reducing valve 250 and adjusting the pressure reducing valve 250 by a rotational force generated according to a control signal; A main controller connected to the electric motor 230 to control the electric motor 230; A flow meter 260 installed on one side of the pressure reducing valve 250 for checking a flow rate flowing into the pressure reducing valve 250; A first pressure sensor 270a installed between the pressure reducing valve 250 and the flow meter 260 for measuring a pressure of a flow rate flowing into the pressure reducing valve 250, A second pressure sensor (270b) installed on the other surface of the pressure reducing valve (250) and connected to the main controller by a cable to measure a pressure of a flow rate discharged from the pressure reducing valve (250); A waste pipe 130 for bypassing the flow rate of the flow to the pressure reducing valve 250, the flow meter 260, the first pressure sensor 270a or the second pressure sensor 270b, And a bypass valve (150) provided at a connecting portion between the cooling water discharge pipe (30) and the heating water discharge pipe (50) for opening and closing the right pipe (130) And a malfunction detection unit for determining whether the flow meter 260, the first pressure sensor 270a, or the second pressure sensor 270b is malfunctioning.

The right side pipe 130 of the present invention is connected to the cooling water discharge pipe 30 and the heating water discharge pipe 50 so that the inlet side and the outlet side of the flow meter 260 are connected to each other, (132); A second bypass pipe (134) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) so that the inlet side and the outlet side of the first pressure sensing sensor (270a) are connected; A third bypass pipe (136) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) so that the inlet side and the outlet side of the pressure reducing valve (250) And a fourth bypass pipe (138) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) so as to connect the inlet side and the outlet side of the second pressure sensor (270b) do.

In addition, the bypass valve (150) of the present invention includes a first valve (151) installed at the inlet side of the first bypass pipe (132); A second valve (152) installed at an outlet side of the first bypass pipe (132); A third valve (153) installed at an inlet side of the second bypass pipe (134); A fourth valve (154) installed at an outlet side of the second bypass pipe (134); A fifth valve (155) installed at an inlet side of the third bypass pipe (136); A sixth valve (156) installed at an outlet side of the third bypass pipe (136); A seventh valve (157) installed at an inlet side of the fourth bypass pipe (138); And an eighth valve (158) installed at an outlet side of the fourth bypass pipe (138).

The apparatus for controlling a circulating water pipe for an injection mold apparatus according to the present invention uses the compressed air supplied for operation to discharge water remaining in the mold in the step before the mold replacement so that contamination of the workplace and the injection apparatus due to residual water leakage It is advantageous to prevent unnecessary cleaning work from being performed.

In addition, when the operation of the injection apparatus is stopped, the circulating water pipe control apparatus for an injection mold apparatus according to the present invention bypasses the compressed air and supplies it to the cooling water supply pipe and the heating water supply pipe to forcibly discharge the cooling water and the heating water remaining in the mold So that it is not cooled even during a cold weather, and there is an advantage that the device can be maintained in a comfortable state.

In addition, the apparatus for controlling a circulating water pipe for an injection mold apparatus according to the present invention has an advantage of preventing inflow of air along a pipe when discharging residual water mixed with water and air forced by compressed air.

Further, in the circulating water pipe control apparatus for an injection mold apparatus according to the present invention, the drainage water is passed through the gas-liquid separator without discharging it, and only the liquid is discharged, and the air is separately discharged to cause a water hammer phenomenon in the pipe, There is an advantage that the phenomenon that the pump is idling (cavitation phenomenon) is prevented.

In addition, the circulating water pipe control apparatus for an injection mold apparatus according to the present invention can automatically operate and control the valves installed in various piping by an automatic method, .

In addition, the circulating water pipe control apparatus for an injection mold apparatus according to the present invention is characterized in that a malfunction detection unit is provided in the heating water discharge pipe and the cooling water discharge pipe so that the pressure reducing valve, the flow meter, There is an advantage that it can be easily recognized whether the pressure sensor is malfunctioning.

Further, in the circulating water pipe control apparatus for an injection mold apparatus according to the present invention, since the first drain pipe and the second drain pipe are formed in a coil shape inside the separator and the separation hole portion for discharging the heated water and the cooling water is formed, And the first drain pipe and the second drain pipe are arranged so as to be spaced apart from each other. Therefore, the advantage that heat or cooling water discharged from each drain pipe can be prevented from being applied to different drain pipes, .

1 is a block diagram of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention.
FIG. 2 is a configuration diagram showing a control signal delivery state of the circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention.
3 is a piping diagram to which a gas-liquid separator of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention is applied.
4 is a perspective view illustrating a gas-liquid separator of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a gas-liquid separator of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention.
6 is a block diagram illustrating a malfunction sensing unit of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of a circulating water pipe control apparatus for an injection mold apparatus according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram of a control signal of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention. FIG. 3 is a piping diagram to which a gas-liquid separator of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention is applied.

4 is a perspective view illustrating a gas-liquid separator of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention, and FIG. 5 is a schematic view illustrating a circulating water pipe control for an injection mold apparatus according to an embodiment of the present invention. FIG. 6 is a block diagram illustrating a malfunction sensing unit of a circulating water pipe control apparatus for an injection mold apparatus according to an embodiment of the present invention. Referring to FIG.

1 to 6, an apparatus for controlling a circulating water pipe for an injection mold apparatus according to an embodiment of the present invention includes an air tube 10 for supplying compressed air for operation of an injection mold apparatus, A cooling water supply pipe 20 to which cooling water is supplied, a cooling water discharge pipe 30 to discharge the cooled cooling water, a heating water supply pipe 40 to which heating water is supplied for preheating the mold, And a water discharge pipe 50.

The circulating water pipe control apparatus for an injection mold apparatus according to the present embodiment includes a first air pipe 11 branched from an air pipe 10 and connected to a cooling water supply pipe 20, The air is bypassed through the cooling water supply pipe 20 and the heating water supply pipe 40 in a state in which supply of air to the mold is blocked in the stage before the replacement of the mold of the injection mold apparatus, A second air pipe 12 for discharging the remaining cooling water and heating water in the mold through the cooling water discharge pipe 30 and the heating water discharge pipe 50 and the second air pipe 12 connected to the cooling water discharge pipe 30 and the heating water discharge pipe 50 A gas-liquid separator 70 installed in the first drain pipe 31 and the second drain pipe 51 for introducing the remaining water, a gas-liquid separator 70 installed in the first drain pipe 31 and the second drain pipe 51, And the liquid is discharged to the cooling water discharge pipe 30 and the cooling water discharge pipe 50 so as to be returned to the cooling water discharge pipe 30 and the heating water discharge pipe 50, The first liquid pipe 32 and the second liquid pipe 52 provided between the hot water discharge pipe 50 and the gas-liquid separator 70 and the pressure of the circulating water flowing in the cooling water discharge pipe 30 and the heated water discharge pipe 50 An electric motor 230 installed on one side of the pressure reducing valve 250 for adjusting the pressure reducing valve 250 by a rotational force generated in accordance with a control signal, A main controller for controlling the electric motor 230 and a flow meter 260 installed on one side of the pressure reducing valve 250 for checking a flow rate flowing into the pressure reducing valve 250, A first pressure sensor 270a which is installed between the flow meter 260 and connected to the main controller by a cable to measure the pressure of the flow rate flowing into the pressure reducing valve 250 and a second pressure sensor 270b installed on the other side of the pressure reducing valve 250 , And is connected to the main controller by a cable to measure the pressure of the flow rate discharged from the pressure reducing valve 250 A second bypass valve 230 for bypassing the flow rate of the flow rate to the first pressure sensor 270a and the second bypass valve 270b, and a bypass pipe 130 for bypassing the flow rate to the decompression valve 250, the flowmeter 260, the first pressure sensor 270a or the second pressure sensor 270b, And a bypass valve 150 provided at a connection portion between the cooling water discharge pipe 30 and the heating water discharge pipe 50 for opening and closing the right pipe 130. The main controller is connected to the pressure reducing valve 250, the flow meter 260, the first pressure sensor 270a, or the second pressure sensor 270b.

In the present embodiment, an air tube 10 for supplying compressed air for operation of the injection mold apparatus, a cooling water supply pipe 20 for supplying cooling water for cooling the mold, and a cooling water discharge pipe 30, a heating water supply pipe 40 to which heating water is supplied for preheating the mold, and a heating water discharge pipe 50 to discharge heated water after preheating.

The compressed air is supplied to the air tube 10, the cooling water supply pipe 20, the cooling water discharge pipe 30, the heating water supply pipe 40 and the heating water discharge pipe 50 from the mold, First to fifth valves 10a, 20a, 30a, 40a, and 50a for controlling the flow rate of the refrigerant are provided close to the mold side.

First and second shutoff valves 21 and 41 for shutting off the supply are provided on the upper part of the cooling water supply pipe 20 and the heating water supply pipe 40. The cooling water discharge pipe 30 and the heating water discharge pipe 50 are provided with discharge And the first and second check valves 35 and 55 for blocking the reverse flow of the cooling water and the heated water.

The first air pipe 11 branched from the air pipe 10 is connected to the cooling water supply pipe 20 while the supply of the compressed air to the mold is stopped by closing the first valve 10a, And the compressed air is supplied to the cooling water supply pipe 20 through the first air pipe 11 in a state in which the first shutoff valve 21 is opened.

The second air pipe 12 branched from the air pipe 10 is connected to the heating water supply pipe 40 and the fourth valve 40a is closed while the supply of the compressed air to the mold is stopped by closing the first valve 10a, The compressed air is supplied to the heating water supply pipe 40 through the second air pipe 12 with the second cutoff valve 41 cut off.

The first and second air pipes 11 and 12 are provided with first and second automatic valves 13 and 14 for controlling supply and interruption of air, respectively, and first and second automatic valves 13 and 14, Is controlled to be opened or closed in an automatic manner according to the set value through the control unit (60).

The first and second drain pipes 31 and 51 are provided in the cooling water discharge pipe 30 and the heating water discharge pipe 50 respectively and the gas and liquid separator 70, and the gas-liquid separator 70 includes a separator 71 for separating the liquid and the gas from the liquid.

The separator 71 may be made of stainless steel or synthetic resin which does not cause corrosion and flows through the lower portion of the separator 71 and has the ends of the 1,2 drain pipes 31 and 51 And the first and second drain valves 33 and 53 are installed.

The ends of the first and second drain valves 33 and 53 are positioned close to the ceiling portion of the separation tube 71 so that the liquid can be quickly separated Respectively.

A water level sensor 72 for checking the water level is provided on the upper portion of the separator 71. The gas separated from the gas-liquid separator 70 is exhausted and the liquid is connected to the cooling water discharge pipe 30 and the heating water discharge pipe 50 And the first and second liquid pipes 32 and 52.

First and second liquid pipe valves 34 and 54 are installed at the lower side of the inner space and the ends of the first and second liquid pipes 32 and 52 are installed in the upper portion of the separation tube 71, The ends of the first and second liquid pipe valves 34 and 54 are formed so as to be positioned close to the bottom portion of the separation cuvette 71 so as to discharge only the remaining collected water. So that it is naturally discharged by the pressure of the air.

The amount of compressed air exhausted through the exhaust pipe 74 is set to be greater than the amount of exhaust gas discharged through the exhaust pipe 74. The exhaust pipe 74 is connected to the air pipe 10, It is minimized so as not to be influenced by the pressure of the remaining water through the first and second liquid pipes (32) and (52).

The water level sensor 72 is connected to the control unit 60 and transmits a signal to the control unit 60 for checking the amount of the remaining water collected in the separation tank 71. The control unit 60 controls the first to fifth valves The first and second drain valves 33 and 53 and the first and second liquid pipe valves 34 and 54 and the exhaust valve 73 are opened and closed by the first and second valves 10a, 20a, 30a, 40a and 50a, To control the compressed air, the drain and discharge of the remaining water, and the compressed air exhaust.

The controller 100 bypasses air through the cooling water supply pipe 20 and the heating water supply pipe 40 in a state where supply of air to the injection mold apparatus is stopped before the metal mold is replaced with the mold so that the remaining cooling water The heating water is discharged through the cooling water discharge pipe 30 and the heating water discharge pipe 50.

Since the discharge pressure of the cooling water and the heating water discharged from the cooling water discharge pipe 30 and the heating water discharge pipe 50 of the present embodiment can be controlled by the pressure reducing valve 250, So that a sufficient heat exchange action is achieved.

In addition, the pressure reducing valve 250 is installed in the cooling water discharge pipe 30 and the heating water discharge pipe 50 according to the present embodiment to control the discharge speed of the discharged cooling water or heating water, so that the cooling water is rapidly supplied to the heated pipe Or the sudden supply of the heating water to the cooled pipe can be prevented.

Therefore, it is possible to prevent thermal shock from being applied to the piping connected to the cooling water discharge pipe 30 and the heated water discharge pipe 50.

The electric motor 230 of the present embodiment is installed on one side of the pressure reducing valve 250 and generates a predetermined rotational force in accordance with a control signal of the main controller and regulates the pressure reducing valve 250 with the generated rotational force.

The speed reducer 240 is installed between the electric motor 230 and the pressure reducing valve 250 so that the rotation of the electric motor 230 is decelerated by the gear ratio so that the pressure reducing valve 250 is slowly driven.

The flow meter 260 is installed on one side of the pressure reducing valve 250 so that the user can check the flow rate flowing into the pressure reducing valve 250.

The first pressure sensor 270a is installed between the pressure reducing valve 250 and the flow meter 260 and is connected to the main controller by a cable to measure the pressure of the flow rate flowing into the pressure reducing valve 250.

The second pressure sensor 270b is installed on the other side of the pressure reducing valve 250 and connected to the main controller by a cable to measure the pressure of the flow rate discharged from the pressure reducing valve 250.

The present embodiment also includes a wastewater pipe 130 for bypassing the flow rate to the pressure reducing valve 250, the flow meter 260, the first pressure sensor 270a or the second pressure sensor 270b, And a bypass valve 150 installed at a connection portion between the cooling water discharge pipe 30 and the heating water discharge pipe 50 and for opening and closing the right pipe 130.

The main controller transmits an open signal to the bypass valve 150 when the operation of moving the flow rate along the cooling water discharge pipe 30 and the heating water discharge pipe 50 is continued for the set period and the pressure reducing valve 250 and the flow meter 260 The flow rate meter 260, the first pressure sensor 270a or the second pressure sensor 270b determines the data transmitted from the first pressure sensor 270a or the second pressure sensor 270b, It is judged whether or not it is faulty.

At this time, when data exceeding the set value or the setting range inputted to the main controller is received, the trouble signal is transmitted from the main controller to the alarm generating unit, so that the operator can operate the pressure reducing valve 250, the flow meter 260, the first pressure sensor 270a It is possible to recognize whether or not the second pressure sensor 270b is malfunctioning, thereby enabling smooth replacement work.

The right pipe 130 has a first bypass pipe 132 installed in the cooling water discharge pipe 30 and the heating water discharge pipe 50 so as to connect the inlet side and the outlet side of the flow meter 260, A second bypass pipe 134 installed in the cooling water discharge pipe 30 and the heating water discharge pipe 50 so that the inlet side and the outlet side of the sensor 270a are connected to each other and a second bypass pipe 134 connected to the inlet side and the outlet side of the pressure reducing valve 250 A third bypass pipe 136 provided in the cooling water discharge pipe 30 and the heating water discharge pipe 50 so as to be connected to the first pressure sensor 270b and the cooling water discharge pipe 30 and a fourth bypass pipe 138 provided in the heated water discharge pipe 50.

The bypass valve 150 includes a first valve 151 provided at the inlet side of the first bypass pipe 132, a second valve 152 provided at the outlet side of the first bypass pipe 132, A third valve 153 provided at the inlet side of the second bypass pipe 134, a fourth valve 154 provided at the outlet side of the second bypass pipe 134, a third bypass pipe 136, A sixth valve 156 provided at the outlet side of the third bypass pipe 136 and a sixth valve 156 provided at the inlet side of the fourth bypass pipe 138. The fifth valve 155 is provided on the inlet side of the fourth bypass pipe 138, A valve 157 and an eighth valve 158 installed at the outlet side of the fourth bypass pipe 138.

When the open signal is inputted from the main controller, the first valve 151 and the second valve 152 are opened and the flow rate supplied to the flow meter 260 is bypassed along the first bypass pipe 132, The flow rate of the gas supplied to the gasification chamber is reduced.

At this time, the flow rate signal transmitted from the flow meter 260 is reduced and must be received by the main controller. If the flow rate signal inputted to the main controller is higher than the set value, a failure signal transmitted from the main controller is received by the alarm generator, .

The first pressure sensor 270a, the pressure reducing valve 250, or the second pressure sensor 270b can also be checked by the main controller for failure by the above-described operation.

The first drain pipe 31 is connected to the cooling water discharge pipe 30 of the present embodiment and the second drain pipe 51 is connected to the heating water discharge pipe 50. The first drain pipe 31 and the second drain pipe Liquid separator 70 is connected to the drain pipe 51 and the cooling water discharged from the gas-liquid separator 70 is supplied to the cooling water discharge pipe 30 by the first liquid pipe 32 and discharged from the gas-liquid separator 70 Is connected to the heating water discharge pipe (50) by the second liquid pipe (52).

As described above, the bubbles are removed from the cooling water and the heating water discharged from the mold, and the cooling water and the heating water can be recycled while circulating the bubbles again to the mold.

The gas-liquid separator 70 of this embodiment is configured such that the first drain pipe 31 and the second drain pipe 51 are inserted from the lower end and the first liquid pipe 32 and the second liquid pipe 52 are inserted A separation hole 51a formed in the first drain pipe 31 and the second drain pipe 51 and a support 31a supporting the first drain pipe 31 .

The first drain pipe (31) and the second drain pipe (51) inserted from the lower side of the separator (71) extend upward while being bent into a coil shape, and the outer diameter of the first drain pipe The first drain pipe 31 and the second drain pipe 51 are spaced apart from each other in the separator 71a. The first drain pipe 31 and the second drain pipe 51 are formed to be smaller than the inner diameter of the second drain pipe 51.

Since the separation hole 51a is formed in the first drain pipe 31 and the second drain pipe 51 disposed in the separator 71, the cooling water and the heating water introduced into the separator 71 are discharged to the first drain The cooling water and the heating water are scattered to the inside of the separation tube 71 through the separation hole portion 51a while being rotated and moved along the pipe 31 and the second drain pipe 51. As a result, .

Accordingly, it is possible to prevent the cooling water from being rapidly supplied to the separator 71 heated to a predetermined temperature or higher in a short time while the heating water is discharged, and to prevent the cooling water from being rapidly supplied to the separator 71, The supply of the thermal shock to the separation cylinder 71 and the pipe can be effectively prevented.

The first drain pipe 31 of this embodiment is bent in a coil shape while maintaining a small outer diameter as compared with the second drain pipe 51 and extends upward so that the separation hole portion 51a of the first drain pipe 31 Can be prevented from being directly brought into contact with the second drain pipe (51), thereby preventing the thermal shock from being applied to the second drain pipe (51).

A plurality of supporting rods 31a extending upward are provided on the bottom surface of the separator 71. The supporting rods 31a are welded to the outer wall of the first drain pipe 31 to be bent in a coil shape, 1 drain pipe 31 as shown in FIG.

The second drain pipe 51, which has an inner diameter larger than the outer diameter of the first drain pipe 31 and is bent in a coil shape and extends upward, is welded to the inner wall of the separation pipe 71, Respectively.

Since the separation hole portion 51a of the present embodiment is formed below the first drain pipe 31 and the second drain pipe 51, the cooling water and the heating water can flow through the first drain pipe 31 and the second drain pipe 51 The cooling water and the heating water are scattered while being discharged into the separator through the separation hole portion 51a.

Therefore, rapid heat exchange does not proceed between the cooling water and the piping, or between the heating water and the piping, in which the temperature is greatly increased, so that the thermal shock can be effectively prevented from being applied to the piping and the separation cylinder 71 due to the gradual heat exchange.

As a result, the remaining water remaining in the mold during the repair work of the mold or the production of other products can be discharged to the outside of the mold, thereby preventing the environmental pollution in the workplace, and the bubbles contained in the remaining water discharged from the mold And the supply pressure and supply amount of the cooling water and the heating water supplied along the cooling water supply pipe and the heating water supply pipe are adjusted according to the mold condition such as the size of the mold and the temperature of the mold It is possible to provide a circulating water pipe control apparatus for an injection mold apparatus capable of supplying cooling water and heating water by adjusting the flow rate to an appropriate value and an appropriate supply pressure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

Also, the circulating water pipe control device for injection mold apparatus has been described as an example, but this is merely an example, and the control device of the present invention can be used for products other than the circulating water pipe control device for the injection mold apparatus.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: air tube 10a: first valve
11: first air tube 12: second air tube
13: first automatic valve 14: second automatic valve
20: cooling water supply pipe 20a: second valve
21: first shut-off valve 30: cooling water discharge pipe
30a: third valve 31: first drain pipe
32: first liquid pipe 33: first drain valve
34: first liquid pipe valve 35: first check valve
40: Heating water supply pipe 40a: Fourth valve
41: second shut-off valve 50: heating water outlet pipe
50a: fifth valve 51: second drain pipe
52: second liquid pipe 53: second drain valve
54: second liquid pipe valve 55: second check valve
60: control unit 70: gas-liquid separator
71: Separator 72: Water level sensor
73: exhaust valve 100: control device

Claims (3)

(10) for supplying compressed air for the operation of the injection mold apparatus, a cooling water supply pipe (20) for supplying cooling water for cooling the mold, a cooling water discharge pipe (30) for discharging the cooled cooling water, a preheating And a heating water discharge pipe (50) for discharging the preheated heated water. The circulating water pipe control device for an injection mold apparatus according to claim 1, wherein the heating water supply pipe (40)
A first air pipe (11) branched from the air pipe (10) and connected to the cooling water supply pipe (20);
The cooling water supply pipe (20) is connected to the heating water supply pipe (40) so that the supply of air to the cooling water supply pipe (20) and the heating water supply pipe A second air pipe (12) for bypassing air through a supply pipe (40) to discharge remaining cooling water and heating water in the mold through the cooling water discharge pipe (30) and the heating water discharge pipe (50);
A first drain pipe 31 and a second drain pipe 51 connected to the cooling water discharge pipe 30 and the heating water discharge pipe 50, respectively;
A gas-liquid separator (70) installed in the first drain pipe (31) and the second drain pipe (51) and flowing residual water;
The gas separated from the gas-liquid separator 70 is discharged and the liquid is discharged to the cooling water discharge pipe 30 and the heating water discharge pipe 50 through the cooling water discharge pipe 30 and the heating water discharge pipe 50, A first liquid pipe (32) and a second liquid pipe (52) installed between the separators (70);
A pressure reducing valve (250) for adjusting the pressure of the circulating water flowing in the cooling water discharge pipe and the heating water discharge pipe;
An electric motor 230 installed on one side of the pressure reducing valve 250 and adjusting the pressure reducing valve 250 by a rotational force generated according to a control signal;
A main controller connected to the electric motor 230 to control the electric motor 230;
A flow meter 260 installed on one side of the pressure reducing valve 250 for checking a flow rate flowing into the pressure reducing valve 250;
A first pressure sensor 270a installed between the pressure reducing valve 250 and the flow meter 260 for measuring a pressure of a flow rate flowing into the pressure reducing valve 250,
A second pressure sensor (270b) installed on the other surface of the pressure reducing valve (250) and connected to the main controller by a cable to measure a pressure of a flow rate discharged from the pressure reducing valve (250);
A waste pipe 130 for bypassing the flow rate of the flow to the pressure reducing valve 250, the flow meter 260, the first pressure sensor 270a or the second pressure sensor 270b, And a bypass valve (150) provided at a connecting portion between the cooling water discharge pipe (30) and the heating water discharge pipe (50) for opening and closing the right pipe (130) And a malfunction detecting part for determining whether the flow meter (260), the first pressure sensor (270a) or the second pressure sensor (270b) is faulty, Water piping control device.
The washing machine according to claim 1, wherein the right-side pipe (130)
A first bypass pipe (132) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) to connect the inlet side and the outlet side of the flow meter (260);
A second bypass pipe (134) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) to connect the inlet side and the outlet side of the first pressure sensor (270a);
A third bypass pipe (136) installed in the cooling water discharge pipe (30) and the heating water discharge pipe (50) so that the inlet side and the outlet side of the pressure reducing valve (250) And
And a fourth bypass pipe (138) provided in the cooling water discharge pipe (30) and the heating water discharge pipe (50) so as to connect the inlet side and the outlet side of the second pressure sensor (270b) A circulating water pipe control device for an injection mold apparatus.
3. The apparatus of claim 2, wherein the bypass valve (150)
A first valve 151 installed at an inlet side of the first bypass pipe 132;
A second valve (152) installed at an outlet side of the first bypass pipe (132);
A third valve (153) installed at an inlet side of the second bypass pipe (134);
A fourth valve (154) installed at an outlet side of the second bypass pipe (134);
A fifth valve (155) installed at an inlet side of the third bypass pipe (136);
A sixth valve (156) installed at an outlet side of the third bypass pipe (136);
A seventh valve (157) installed at an inlet side of the fourth bypass pipe (138); And
And an eighth valve (158) installed at an outlet side of the fourth bypass pipe (138).

Images