KR20100011739A - Apparatus for eliminating rust in passage of cooling structure body in the metal mold and method for eliminating rust - Google Patents

Abstract

PURPOSE: A rust removing device within a flow path on a cooling structure of a mold and a rust removing method using the same are provided to suppress rust by forming a rust-proof film on the inside of a flow path. CONSTITUTION: A rust removing device within a flow path on a cooling structure of a mold comprises a rustproof mixed solution tank(10), an ultrasonic wave generator(20), a circulating pump(30), supply and collecting flexible pipes(40,40'), and a foreign material collecting vessel(50). The rustproof mixed solution stores rustproof mixed solution which contains the water and the phosphoric acid. The ultrasonic wave generator applies supersonic vibration on the rustproof mixed solution. The circulating pump circulates the rustproof mixed solution from the tank to a cooling structure of a mold. The supply flexible pipe connects the one end of the flow path and the tank to transfer the rustproof mixed solution to the flow path of the cooling structure. The collecting flexible pipe connects one end of the flow path and the foreign material collecting vessel to collect the rustproof mixed solution.

Description

Apparatus for eliminating rust in passage of cooling structure body in the metal mold and method for eliminating rust}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view showing a rust removing apparatus in a flow path in a cooling structure of a mold of the present invention.

<Explanation of symbols for main parts of drawing>

1: movable side mold 2: fixed side mold

3: movable panel 3 ': fixed panel

4, 4 ': guide rail 10: mixed solution tank for rust prevention

11 heating means 20 ultrasonic generator

21: vibration amplifier 30: circulation pump

40: supply side flexible pipe 40 ': recovery side flexible pipe

50: foreign material recovery container 51: filter

The present invention relates to an apparatus for removing rust and a method for removing rust from a cooling structure in a mold. More particularly, ultrasonic vibration is applied to an anti-rust solution and an anti-corrosion mixture of hot water to circulate in a flow path of a cooling structure to remove rust. The present invention relates to a rust removal device and a rust removal method in a flow path in a cooling structure of a mold capable of simplifying rust removal without the need for water washing or a neutralization operation conventionally required after the execution.

Various metal molds are provided with a cooling structure consisting of a flow path for circulating the cooling water, the release rate of the molded body is changed by the thickness change of the molded body. There is no method of equalizing the release rate, but according to the development of the joining technology of various metals, the design of the cooling structure (euro) has evolved into a fine cooling structure (euro) and is trying to prevent rust in the cooling structure.

In general, it is common practice to use inexpensive water for cooling metal molds. The metal mold must also be cooled continuously by forming continuously, but the diameter of the hole designed as the metal mold cooling channel for long-term use also needs to be cooled by ordinary water. In this case, the diameter of the flow path is estimated to decay to about 1/3 in about 6 months.

Conventionally, it is considered difficult to provide a cooling structure in the vicinity of the rear surface of the cavity, and it is considered difficult in the processing technology. Thus, a drill passage is used to drill the vertical portion or the side of the mold cavity to form a flow path. However, even though the perforated flow path is not in communication, even though the pillar gate of the shrine is in communication with the cooling water, the cooling water partially remains in the mold, so that the mold is immersed in a high temperature, which promotes the occurrence of rust and adversely affects the life of the mold.

Thus, the water circulated in the cooling structure is easy to accumulate, and in particular, when the shape of the cooling water passage is complicated, the cooling water is hard to come out, so rust is likely to occur on the inner surface of the cooling water passage. When rust occurs, it is difficult for the cooling water to flow in the cooling channel at a uniform rate, which increases the cooling solidification time of the mold to be molded, and adversely affects the molded product due to a lack of cooling.

Conventionally, chlorine generated in the cooling structure is removed by supplying hydrochloric acid, sulfuric acid or acetic acid to the cooling structure. Thus, when hydrochloric acid, sulfuric acid, or acetic acid is used for rust removal, if hydrochloric acid groups, sulfuric acid groups, or acetic acid groups remain, rust is more likely to occur than ever before. Therefore, after the rust removal work is performed with hydrochloric acid, sulfuric acid or acetic acid, the hydrochloric acid group, sulfuric acid group or acetic acid group is rapidly removed by flushing with water in a cooling channel. Furthermore, after washing with water, neutralization solution is supplied and neutralized. After that, the neutralization solution is washed with water, dried, and finally rust preventive oil is injected. That is, conventionally, rust removal work by hydrochloric acid, sulfuric acid, or acetic acid → washing work → neutralization treatment work to supply neutralizing liquid → washing work of neutralizing liquid → drying → injection of anti-rust oil is performed.

As described above, in the related art, after washing with rust, washing with water, neutralization, washing with water, pouring of anti-rust oil, and a large number of working processes are required. In addition, water washing pipes, water washing devices such as pumps that send the water, neutralization fluids such as pipes for neutralizing liquids, and pumps for neutralizing liquids, and anti-rust oil injection devices are required. It becomes and becomes very expensive thing.

However, the hydrochloric acid group and the sulfuric acid group tend to remain even if time-consuming water washing is sufficiently performed using the apparatus. In addition, it is necessary to ensure that the flushing water and the neutralizing liquid itself supplied to the cooling channel do not remain.However, if the shape of the cooling water path is complicated and it is a labyrinth, water or neutralization liquid for washing may remain and cause rust. There is a problem.

In addition, since hydrochloric acid is hydrochloric acid and sulfuric acid is hydrofluoric acid, all have acid containing hydrogen. When rust removal is performed using this, most of the mold material is carbon steel, so hydrogen embrittlement occurs due to hydrogen influence. This softness has a drawback. In particular, when hydrochloric acid is used, it is easy to remain as a gas because it is volatile, and there is a problem in that rust regeneration occurs even if a few gases remain.

In this way, the cooling water in the flow passage is not completely discharged in the flow passage of the cooling structure, and rust is generated due to the fact that it partially remains at all times. Rust prevention in the cooling structure of a metal mold | die, such as the need for a liquid, can be said that there are many unsolved parts so far.

The present invention has been invented by the present inventors in earnest effort to solve the problem of rust generation occurring in the cooling structure of the conventional mold in view of the problems caused when using the hydrochloric acid and sulfuric acid, the object is the main component Ultrasonic vibration is applied to the rust-preventing mixed solution in which hot water is mixed with phosphoric acid, and it is circulated by pressure in the flow path of the cooling structure to remove rust, and cooled. The present invention provides a rust removal device and a rust removal method in a flow path.

Another object of the present invention is a rust removal device in a flow path in a cooling structure of a mold that can simplify the rust removal process and the rust removal device without the washing operation, the neutralization treatment, and the rust prevention oil injection operation, which were conventionally required. And a method for removing rust.

Still another object of the present invention is to circulate the anti-corrosion liquid, which serves as cooling and rust prevention, to the flow path of the cooling structure provided on the rear side of the cavity of various molding dies to prevent cooling and rusting of the molding dies. The present invention provides a rust removal device and a rust removal method in a flow path in a cooling structure of a mold, which can improve the quality and productivity of a molded product and increase the life of the mold by a normal molding operation.

Rust removal apparatus in the flow path in the cooling structure of the metal mold of the present invention for achieving the above object is an anti-corrosive mixed liquid tank (10) for storing the anti-corrosive mixed liquid produced by adding phosphoric acid to a predetermined ratio; An ultrasonic generator (20) embedded in the anti-rust mixed liquid tank (10) to impart ultrasonic vibration to the anti-rust mixed liquid stored in the anti-rust mixed liquid tank (10); A circulation pump (30) for circulating the anti-rust mixed liquid from the anti-rust mixed liquid tank (10) to a cooling structure of a mold; A supply-side flexible pipe 40 communicating the rust mixed liquid tank 10 for transferring the rust mixed liquid pumped by the circulation pump 30 to the flow path in the cooling structure and one end of the flow path in the cooling structure; A recovery-side flexible pipe 40 'configured to communicate between one end of the flow path in the cooling structure and the foreign matter recovery container to recover the anti-rust mixed solution circulated through the flow path in the cooling structure; It consists of a structure provided with the foreign matter recovery container 50 provided with the filter which isolate | separates a foreign material from the anti-rust mixed liquid circulated through the flow path in a cooling structure.

In addition, the rust removal method in the flow path in the cooling structure of the mold of the present invention for achieving the above object is to give ultrasonic vibration to the anti-corrosive mixture solution formed by adding phosphoric acid to the water at a predetermined ratio to give the cooling structure of the mold at a predetermined pressure. By supplying from one end of the flow path and discharging from the other end, the rust generated on the inner surface of the flow path of the cooling structure of the mold is removed, and an anti-corrosive film of iron phosphate in which the phosphoric acid and the iron of the flow path forming material in the rust-preventing mixture are combined is applied to the cooling structure of the mold. It is formed on the inner surface of the flow path.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rust removing device and a removal method in a flow path in a cooling structure of a mold of the present invention will be described in detail with the accompanying drawings and preferred embodiments.

1 is a cross-sectional view showing a rust removing device in the flow path in the cooling structure of the mold of the present invention, the rust removing device in the flow path in the cooling structure of the mold of the present invention is for rust prevention produced by adding phosphoric acid to a predetermined ratio An anti-rust mixed liquid tank 10 for storing the mixed liquid; An ultrasonic generator (20) embedded in the anti-rust mixed liquid tank (10) to impart ultrasonic vibration to the anti-rust mixed liquid stored in the anti-rust mixed liquid tank (10); A circulation pump (30) for circulating the anti-rust mixed liquid from the anti-rust mixed liquid tank (10) to a cooling structure of a mold; A supply-side flexible pipe 40 communicating the rust mixed liquid tank 10 for transferring the rust mixed liquid pumped by the circulation pump 30 to the flow path in the cooling structure and one end of the flow path in the cooling structure; A recovery-side flexible pipe 40 'configured to communicate between one end of the flow path in the cooling structure and the foreign matter recovery container to recover the anti-rust mixed solution circulated through the flow path in the cooling structure; It consists of a structure provided with the foreign matter recovery container 50 provided with the filter which isolate | separates a foreign material from the anti-rust mixed liquid circulated through the flow path in a cooling structure.

The rust preventive mixture is a mixture of phosphoric acid in water, the mixing ratio of water 1 to 4: by weight of phosphoric acid 4 to 1. That is, the mixing ratio of water and phosphoric acid Water: phosphoric acid is selected from 1: 4, 2: 3, 3: 2, 4: 1 as needed.

The rust preventive mixed liquid tank 10 is a container for storing the rust preventive mixed liquid mixed with water and phosphoric acid for circulating in the flow path of the cooling structure, and the ultrasonic generator 20 and the vibration inside the rust preventive mixed liquid tank 10 An amplifying plate 21 is mounted, and at the same time, a heating means 11 for heating the rust preventive mixed solution and maintaining it at a constant temperature is provided.

Here, the ultrasonic generator 20 generates ultrasonic waves within the range of 15 to 20 kPa, and the heating means 11 is preferably configured to be a heater so that the heating temperature is maintained within the range of 20 ~ 70 ℃.

A circulating pump 30 is installed between the rust preventive liquid tank 10 and the supply side flexible pipe 40, and the rust preventive liquid mixture in the rust preventive liquid tank 10 is supplied to the supply side by a pumping operation of the circulating pump 30. It is supplied to the flow path in a cooling structure through the pipe 40, and is circulated in a flow path.

In addition, a recovery side flexible pipe 40 'is provided between one end of the flow path in the recovery-side cooling structure and the foreign matter recovery container 50 to recover the anti-rust mixed solution circulated in the cooling structure flow path, and the foreign matter recovery container 50 ) And a flexible pipe 40 'is installed between the rust-preventing mixed liquid tank 10, and a filter 51 for filtering a foreign substance is installed in the foreign substance recovery container 50 to collect the rust-prevented mixed liquid. After the foreign matter is removed, it is returned to the anti-corrosion mixed liquid tank 10 so as to be reused.

Next, the operation of the present invention will be described in detail.

First, referring to FIG. 1, a mold process is schematically illustrated. The molten mold material is pressurized between the movable mold 1 and the fixed mold 2, and the movable plate 3 is guide rails 4 and 4. The movable side mold 1 is pressed toward the fixed side mold 2 by moving toward the fixed plate 3 'side along the'), so that the mold exactly matches the contents of the movable side mold 1 and the fixed side mold 2; Will be cast.

Here, the movable mold (1) and the fixed mold (2) is composed of a cooling structure having a plurality of flow paths for cooling the mold to circulate the cooling water in the plurality of flow paths to cool the mold.

The present invention provides a cooling solution circulated in the flow path in the cooling structure as a rust preventive solution in which phosphoric acid is mixed with water to remove rust generated in the flow path in the cooling structure and to prevent rust. When the rust removal device in the flow path is operated, the ultrasonic wave generator 20 mounted in the anti-rust mixed liquid tank 10 operates to generate ultrasonic waves, and the heating means 11 operates to prevent the mixed liquid tank 10 for anti-rust. The mixed solution for rust prevention is heated. In this way, the anti-rust mixed liquid is heated to a temperature within the range of 20 ~ 70 ℃ by the heating means 11 and the ultrasonic wave generated by vibrating the vibration amplifier plate 21, the vibration is applied to the anti-rust mixed liquid, the anti-rust mixed liquid It will vibrate.

In this state, the circulating pump 30 operates so that a vibrating rust preventive solution having a temperature of 20 to 70 ° C. is introduced into the flow path of the cooling structure in the movable mold 1 and the fixed mold 2 through the supply-side flexible pipe 40. To pump. Accordingly, the rust preventive mixed solution is circulated in the flow path of the cooling structure and then recovered to the foreign matter recovery container 50 through the recovery side flexible pipe 40 '.

The anti-corrosive mixed liquid recovered by the foreign substance recovery container 50 passes through the filter 51 in the foreign substance recovery container 50 to remove foreign substances, and then passes through the flexible pipe 40 'to the anti-rust mixed liquid tank 10. It will be returned and reused.

The ultrasonic generator 20, the heating means 11 and the circulation pump 30 is preferably provided with a separate automatic control means (not shown) to be automatically controlled, the mixed solution for rust prevention by the control of the automatic control means Can be maintained at a constant temperature and circulated to the flow path in the cooling structure at the required strength or pressure of vibration.

While the present invention has been described as a preferred embodiment, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the invention.

For example, in FIG. 1, the foreign matter recovery container 50 is configured on the movable side and the fixed side, respectively, but only one foreign matter recovery container 50 is configured to form the foreign material recovery side flexible pipe 40 ′ on both the movable side and the fixed side. The structure connected to the collection | recovery container 50 is also possible, and a valve | bulb, a pressure gauge, etc. can also be provided in supply side flexible pipe 40 and recovery side flexible pipe 40 'as needed.

The present invention acting as described above has an excellent effect in preventing the occurrence of rust and removal of rust by applying to the passage in which rust occurs, and can be employed in various fields as follows.

1. Casting Gravity Metal Mold Cooling Furnace,

2. Die-cast casting metal mold cooling passage,

3. Low pressure casting metal mold cooling passage,

4. Plastic molding metal mold cooling passage,

5. Rubber product molding metal mold cooling flow path,

6. Metal mold cooling oil to draw or extrude electric wire,

7. Metal mold cooling oil to draw or extrude aluminum sash,

8. Other product molding metal mold cooling oil,

9. Rust prevention in flooring heating and heating piping (liquid flow path),

10. Rust removal of various metals by water quality.

As described above, the rust removing device and the rust removing method in the flow path of the cooling structure of the mold of the present invention impart ultrasonic vibration to the rust-preventing mixed solution in which hot water is mixed with the main component phosphoric acid to circulate pressure in the flow path of the cooling structure to remove rust and At the same time, unlike hydrochloric acid and sulfuric acid, which is conventionally used, there is no need to neutralize the acid, and at the same time, rust is removed and an antirust film made of iron phosphate is formed on the inner surface of the flow path by combining with iron on the inner surface of the flow path to efficiently generate rust. There is an advantage that can be suppressed.

In addition, after the circulation of the rust-preventing liquid solution, the water washing work, the neutralization treatment work and the anti-rust oil injection work, which were conventionally required, are not required. Therefore, the water washing device, the neutralizing fluid supply device, and the anti-rust oil supply device are not required. Is greatly simplified and has the advantage of miniaturization.

In addition, the anti-corrosive mixture solution, which serves as cooling and rust prevention, is circulated to the flow path of the cooling structure provided on the rear side of the cavity of the various molding dies to prevent cooling and rust of the molding dies. Not only can the quality and productivity be greatly improved, but also the mold time can be shortened and the operation rate can be improved, and the life of the mold can be significantly extended.

Claims (8)

An rust preventive solution tank (10) for storing the rust preventive solution produced by adding phosphoric acid to a predetermined ratio; An ultrasonic generator (20) embedded in the anti-rust mixed liquid tank (10) to impart ultrasonic vibration to the anti-rust mixed liquid stored in the anti-rust mixed liquid tank (10); A circulation pump (30) for circulating the anti-rust mixed liquid from the anti-rust mixed liquid tank (10) to a cooling structure of a mold; A supply-side flexible pipe 40 communicating the rust mixed liquid tank 10 for transferring the rust mixed liquid pumped by the circulation pump 30 to the flow path in the cooling structure and one end of the flow path in the cooling structure; A recovery-side flexible pipe 40 'configured to communicate between one end of the flow path in the cooling structure and the foreign matter recovery container to recover the anti-rust mixed solution circulated through the flow path in the cooling structure; An apparatus for removing rust in a flow path in a cooling structure of a metal mold, characterized by comprising a foreign material recovery container (50) having a filter for separating foreign matter from the rust-prevented mixed liquid circulated through the flow path in the cooling structure. The mold according to claim 1, wherein the anti-corrosive mixture is a mixture of phosphoric acid with water, and the mixing ratio is selected from water: phosphoric acid in a weight ratio of 1: 4, 2: 3, 3: 2, 4: 1. Rust removal device in the flow path in the cooling structure of the. The inside of the flow path of the cooling structure of the metal mold | die of Claim 1 characterized by the ultrasonic generator 20 and the vibration amplifier plate 21 which generate | occur | produce ultrasonic vibration in the said rust prevention mixed liquid tank 10. Rust remover. The method of claim 1, wherein a heating means (11) is provided in the anti-rust mixed liquid tank (10) for heating and maintaining the anti-rust mixed liquid at a constant temperature. Rust remover. 5. The apparatus of claim 4, wherein the heating means (11) is a heater and the heating temperature is maintained within a range of 20 to 70 占 폚. Ultrasonic vibration is applied to the rust-prevented mixed solution formed by adding phosphoric acid to water at a predetermined ratio, and at the same time, it is heated and supplied from one end of the cooling structure flow path of the mold and discharged from the other end to generate the inside of the cooling structure flow path of the mold. The rust removal in the flow path of the cooling structure of the mold is formed by forming a rust-proof film of iron phosphate in which phosphoric acid and the iron of the flow path formation material in the rust-preventing mixed liquid are removed and formed on the inner surface of the flow path of the cooling structure of the mold. Way. 7. The rust in the flow path of the cooling structure of the mold according to claim 6, wherein the anti-corrosive mixture is selected from water: phosphate in a weight ratio of 1: 4, 2: 3, 3: 2, 4: 1. How to remove. 7. The method for removing rust in a flow path of a cooling structure of a metal mold according to claim 6, wherein the heating temperature of the rust preventive mixed liquid is in the range of 20 to 70 占 폚.

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