KR101925514B1 - Apparatus and Method for anticorrosing of Mold Cooling Channel - Google Patents

Apparatus and Method for anticorrosing of Mold Cooling Channel Download PDF

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Publication number
KR101925514B1
KR101925514B1 KR1020150057931A KR20150057931A KR101925514B1 KR 101925514 B1 KR101925514 B1 KR 101925514B1 KR 1020150057931 A KR1020150057931 A KR 1020150057931A KR 20150057931 A KR20150057931 A KR 20150057931A KR 101925514 B1 KR101925514 B1 KR 101925514B1
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KR
South Korea
Prior art keywords
mold
cooling passage
cooling
corrosion inhibitor
cooling channel
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Application number
KR1020150057931A
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Korean (ko)
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KR20160126624A (en
Inventor
김억수
박진영
박성범
최지환
윤필환
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한국생산기술연구원
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Priority to KR1020150057931A priority Critical patent/KR101925514B1/en
Publication of KR20160126624A publication Critical patent/KR20160126624A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/70—Maintenance
    • B29C33/72—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/84—Safety devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The present invention primarily removes foreign matter such as scale generated in the cooling channel by spraying air into the cooling channel of the mold, and secondly, the corrosion inhibitor is filled in the cooling channel in which scale and moisture are removed, The present invention relates to an apparatus for preventing corrosion of a mold cooling passage and a method for preventing corrosion of a mold cooling passage, An air injection unit for injecting compressed air into the cooling passage to remove moisture and scale from the cooling passage; A supply line for connecting the storage tank to one end of the cooling passage; a pump for supplying the corrosion inhibitor in the storage tank to the cooling passage through a supply line; And an opening / closing member that closes one end and the other end of the cooling passage in a state that the cooling passage is closed.

Description

TECHNICAL FIELD [0001] The present invention relates to a mold cooling channel,

More particularly, the present invention relates to an apparatus and a method for preventing corrosion of a cooling passage of a mold, more specifically, to a method of injecting air into a cooling passage of a mold for injection molding to remove scale and sludge, To an apparatus and a method for preventing corrosion of a cooling passage of a mold, which can prevent corrosion of the cooling passage by storing the corrosion inhibitor in the oil passage.

As the use of light metal alloy materials such as aluminum (Al), magnesium (Mg) or zinc (Zn) alloys for the light weight and high performance of transportation machines and household appliances has been expanded, gravity casting using a die, low pressure casting, Technologies such as casting, forging, rolling and extrusion techniques are also becoming increasingly diverse and advanced.

The metal processing method using these molds (SKD 61, which is a main material commonly used for Fe-based special steels, for example, 0.4% C-5% Cr-Mo-V system), depends on the quality of the mold, Life and the like, which is a very important factor, and efforts are being made to increase the quality of the mold.

Among them, temperature control of molds is a key management factor for continuous metal processing (casting, forging, etc.). Normally, in order to maintain the mold temperature uniformly, it is necessary to remove the amount of heat per unit cycle (unit time) applied to the mold within that time, thereby enabling continuous operation without trouble. Therefore, the cooling ducts are designed in various forms such as an annular shape, an angular shape, a bending shape, a bending shape, a baffle shape and the like according to the shape of the mold, and the heat input is removed by flowing the cooling water through the cooling passage have.

However, the cooling flow path inside the mold has a very complicated structure with different shapes and sizes. In recent years, as a means for obtaining high quality, the cooling flow path is designed in the cooling flow path up to the fine pin shape, Lt; / RTI > Most of all, the biggest problem is that rust of various scales or sludge due to corrosion occurs in the inside of the cooling channel due to reaction between dissolved oxygen and the mold material due to water (industrial water) used for cooling, The cooling performance of the mold is rapidly deteriorated, resulting in product quality problems as well as problems such as lowering of productivity, sticking during operation, and ultimately lowering mold life. In addition, this phenomenon causes the problem that the water remaining in the cooling channel and the oxygen in the air abruptly corrode the mold material during the long-term storage of the mold after the operation.

Registration No. 10-1384310 (April 4, 2014) Registration No. 10-1027692 (March 31, 2011) US Published Patent US 2009/0315231 A1 (December 24, 2009)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method and apparatus for injecting air into a cooling flow path of a mold to remove foreign substances such as scale and moisture generated in the cooling flow path, The present invention also provides an apparatus and method for preventing corrosion of a cooling channel by filling a corrosion inhibitor in the removed cooling channel and holding the same for a predetermined period of time.

According to another aspect of the present invention, there is provided an apparatus for preventing corrosion of a mold cooling passage, the apparatus comprising: a mold cooling passage which is connected to one end of a mold cooling passage for injecting compressed air into a cooling passage of the mold, An injection unit; A supply means for supplying a corrosion inhibitor into the cooling passage and an opening and closing member for closing one end and the other end of the cooling passage in a state where the corrosion inhibitor is filled in the cooling passage .

A method for preventing corrosion of a mold cooling passage by using the mold cooling passage corrosion preventing apparatus of the present invention includes a first step of injecting compressed air into a cooling passage of a mold to remove moisture and scale in the cooling passage; A second step of supplying a corrosion inhibitor to the cooling channel of the mold; And a third step of closing both ends of the cooling passage when the corrosion inhibitor is filled in the cooling passage.

According to the present invention, since the moisture and scale remaining in the cooling passage of the metal mold are cleanly removed by the compressed air, and the corrosion inhibitor is filled in the cooling passage in this state, the corrosion is not generated in the cooling passage during storage .

Therefore, when the molding operation is carried out using the stored mold, it is possible to minimize the clogging of the pipe due to the scale, thereby preventing defects such as shrinkage, deformation, It is possible to prevent a decrease in productivity and a reduction in mold life.

1 is a block diagram showing the configuration of an apparatus for preventing corrosion of a mold cooling channel according to an embodiment of the present invention.
2 is a flowchart illustrating a corrosion prevention method of a mold cooling passage according to the present invention.
3 is a photograph showing a state before the scale of the cooling passage of the mold is removed and a state where the scale is removed by spraying compressed air to the cooling passage of the mold.
Fig. 4 is a photograph showing a reaction of a metal specimen having the same composition as that of a mold to a specimen as time goes by when the specimen is immersed in a vessel (left side in the drawing) in which general cooling water is stored (left side in the drawing) .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an apparatus and method for preventing corrosion of a die cooling passage according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an apparatus for preventing corrosion of a mold cooling passage according to an embodiment of the present invention. The apparatus for preventing corrosion of a mold cooling passage according to the present invention is connected to one end of a mold cooling passage 1, An air injection unit for injecting compressed air into the cooling passage 1 to remove moisture and scale in the cooling passage 1 and a corrosion inhibitor supply unit for injecting and filling a corrosion inhibitor through one end of the mold cooling passage 1 .

The air injection unit includes an air supply line 11 having one end connected to one end of the cooling passage 1 and an air compressor 12 for supplying compressed air through the air supply line 11 .

The corrosion inhibitor supply unit includes a supply means for supplying a corrosion inhibitor into the cooling passage 1 and a supply means for supplying a corrosion inhibitor to the one end and the other end of the cooling passage 1 in a state in which the corrosion- And an opening / closing member that closes the opening / closing member.

The supply means includes a storage tank 21 in which a corrosion inhibitor is stored, a supply line 22 connecting one end of the storage tank 21 and one end of the cooling passage 1, And a pump 23 for supplying the refrigerant to the cooling channel 1 through a line 22. [

The opening and closing member includes an inlet valve 31 for controlling the supply of the corrosion inhibitor through the supply line 22 and an outlet valve 31 connected to the other end of the cooling passage 1 for controlling the discharge of the corrosion inhibitor (32). The outlet valve 32 is connected to a drain line 25 which guides the corrosion inhibitor discharged through the outlet valve 32 to the storage tank 21.

In this embodiment, the inlet valve 31 and the outlet valve 32 are used as the opening and closing member. However, when the mold is to be stored for a long period of time, the opening and closing member is sandwiched between the one end and the other end of the cooling passage 1 A separate stopper or sealing member may be applied.

The corrosion inhibitor may be selected from a variety of well-known corrosion inhibitors. The corrosion inhibitor may be selected from the group consisting of HCl, which exhibits excellent performance in removing Fe 2 O 3 , CaO, SiO 2 , MgO and MnO, Based or H 3 PO 4 based acid detergent or an NaOH-based corrosion inhibitor exhibiting an excellent effect for preventing corrosion is preferably diluted with water.

Reference numeral 40 denotes a control panel for controlling the operation of each component of the air injection unit and the corrosion inhibitor supply unit.

A method for preventing corrosion of a mold cooling passage according to the present invention is a method for preventing corrosion of a mold cooling passage according to the present invention, A step S2 for removing water and scale, a step S2 for supplying a corrosion inhibitor to the cooling channel 1 of the mold, a step S2 for closing the both ends of the cooling channel 1 when the corrosion inhibitor is filled in the cooling channel 1, (Step S3).

This will be described in more detail as follows.

First, when the inlet valve 31 is opened and the air compressor 12 is operated, compressed air is supplied along the air supply line 11 and injected into the cooling channel 1 through the inlet valve 31. The high pressure compressed air injected into the cooling passage 1 flows along the cooling passage 1 while discharging foreign matter such as moisture and scale in the cooling passage 1 through the other end of the cooling passage 1 .

When the water and the scale in the cooling channel 1 are removed, the operation of the air compressor 12 is stopped and the pump 23 is operated. When the pump 23 is operated, the corrosion inhibitor in the storage tank 21 flows along the supply line 22 and is injected into the cooling passage 1 through the inlet valve 31.

When the corrosion inhibitor is filled in the cooling passage 1, the outlet valve 32 is closed and the inlet valve 31 is closed so that the inside of the cooling passage 1 is filled with the corrosion inhibitor.

When the inside of the cooling channel 1 is filled with the corrosion inhibitor as described above, when the molding operation using the metal mold is completed and the metal mold is to be replaced or stored, the one end (inlet portion) (Outlet portion) or by sealing the sealing member to completely close the cooling passage 1, and to store the mold separately.

As described above, when compressed air is primarily injected into the cooling channel 1 of the mold to remove moisture and scale, and the cooling channel 1 is filled with the corrosion inhibitor in the secondary cooling channel for more than six months, the cooling channel 1 ) Without any corrosion at all.

3 is a photograph showing a state before the scale of the cooling passage of the metal mold is removed (left side in the drawing) and a state in which the scale is removed by spraying compressed air to the cooling flow path of the metal mold A metal specimen of the same composition as the mold was immersed in a container (left container) containing ordinary cooling water and a container containing the corrosion inhibitor (right container) for 7 days, 15 days, 30 days and 120 days. It is a photograph.

3 and 4, the moisture and scale remaining in the cooling passage 1 of the mold are cleanly removed by the compressed air, and the cooling passage 1 is filled with the corrosion inhibitor in this state, So that the phenomenon of corrosion in the cooling channel 1 during storage is eliminated.

Therefore, when the molding operation is carried out using the stored mold, it is possible to minimize the clogging of the pipe due to the scale, thereby preventing defects such as shrinkage, deformation, It is possible to prevent a decrease in productivity and a reduction in mold life.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: cooling flow path 11: air supply line
12: Air compressor 21: Storage tank
22: supply line 23: pump
25: drain line 31: inlet valve
32: Outlet valve 40: Control panel

Claims (7)

An air injection unit connected to one end of the cooling passage 1 of the mold to inject compressed air into the cooling passage 1 of the mold to remove moisture and scale in the cooling passage 1; A supply means for supplying a corrosion inhibitor for removing a scale generated in the cooling passage 1 of the mold into the cooling passage 1 and a compression means 2 connected to one end of the cooling passage 1 for compressing through the air injection unit An inlet valve 31 for controlling the supply of the corrosion inhibitor through the air and the supply means and an outlet valve 32 connected to the other end of the cooling channel 1 for controlling the discharge of the air and the corrosion inhibitor A corrosion inhibitor supply unit,
The supply means includes a storage tank 21 in which the corrosion inhibitor is stored, a supply line 22 connecting the storage tank 21 and the inlet valve 31, a corrosion inhibitor in the storage tank 21, A pump 23 for supplying the refrigerant to the cooling channel 1 through a supply line 22 and an inlet valve 31 and a discharge pump 32 for connecting the outlet valve 32 and the storage tank 21, And a drain line (25) for guiding the corrosion inhibitor to the storage tank (21)
The air injection unit includes an air supply line 11 whose one end is connected to the inlet valve 31 and an air compressor 12 which supplies compressed air through the air supply line 11 A method for preventing corrosion of a mold cooling channel by using a corrosion prevention device for a mold cooling channel,
(a) opening the inlet valve (31) and the outlet valve (32);
(b) operating the air compressor (12) to inject compressed air into the cooling channel (1) through the inlet valve (31) to remove moisture and scale in the cooling channel (1);
(c) operating the pump 23 to supply the corrosion inhibitor into the cooling channel 1 through the inlet valve 31;
(d) closing the inlet and outlet valves 31 and 32 simultaneously to close both ends of the cooling channel 1 when the cooling channel 1 is filled with the corrosion inhibitor;
(e) storing the mold for a predetermined time in a state where both ends of the cooling channel (1) are closed by an inlet valve (31) and an outlet valve (32);
(f) opening the outlet valve (32) to discharge the corrosion inhibitor in the cooling channel (1) through the drain line (25) to the storage tank (21);
And cooling the mold cooling passage.
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KR1020150057931A 2015-04-24 2015-04-24 Apparatus and Method for anticorrosing of Mold Cooling Channel KR101925514B1 (en)

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KR101925514B1 true KR101925514B1 (en) 2018-12-06

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KR102160103B1 (en) * 2019-08-23 2020-09-29 주식회사 유라테크놀로지 Cleaning method of semiconductor manufacturing apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004353009A (en) * 2003-05-27 2004-12-16 Ryoei Engineering Kk Method for storing metallic member having cooling channel

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Publication number Priority date Publication date Assignee Title
JP4475260B2 (en) 2006-07-26 2010-06-09 トヨタ自動車株式会社 Molding mold cooling system and molding mold cooling method
KR101027692B1 (en) 2008-07-25 2011-04-12 진아다크로 주식회사 Apparatus for eliminating rust in passage of cooling structure body in the metal mold and method for eliminating rust
KR101384310B1 (en) 2013-05-20 2014-04-11 대진아이엠 주식회사 Complex cooling device mold of injection molding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004353009A (en) * 2003-05-27 2004-12-16 Ryoei Engineering Kk Method for storing metallic member having cooling channel

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