JPH085059B2 - Anti-corrosion method for cooling pipes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust preventive method for machines and devices requiring cooling water piping, or parts thereof.

[0002]

2. Description of the Related Art When a machine such as a synthetic resin molding die or a metal die casting die is provided with a cooling water circulation path (pipe) inside the molding apparatus, the inside of the cooling water pipe is stored. It is well known that oxidative corrosion occurs inside pipes when a small amount of water remaining in the air comes into contact with air.

As means for preventing these oxidative corrosion,
A means to prevent oxygen from flowing through the pipe was installed by attaching a plug called a "sealing coupler" to the end of the pipe, but in this method, air was not introduced into the pipe after the plug was attached. Although it can be prevented from flowing in, it was not possible to prevent the occurrence of oxidative corrosion caused by oxygen contained in the water remaining in the pipe.

As a countermeasure against these problems, a rust preventive cap as described in Japanese Utility Model Publication No. 5-1369 has been developed.

This invention is constructed such that a cap containing an oxygen scavenger inside is attached to the end portion of the pipes, and not only prevents air from flowing into the pipes but also leaves them inside the pipes. It was excellent in that it was configured so that the oxygen in the water contained therein could be forcibly removed by an oxygen scavenger.

[0006]

However, in the device described in the above publication, the pipes (cooling water inlet end and outlet end) equipped in the molds (mechanical devices) are protected at all ends. Since it is necessary to install a rust cap, there is a drawback that the work of installing the rust cap becomes extremely large and complicated, and the work of installing the rust cap costs a lot of money. Problems have also been pointed out.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to cope with the above-mentioned situation, in which the inside of a pipe is attached by attaching a container containing an oxygen scavenger to only one end of the pipe or both ends of a long pipe. It is an object of the present invention to provide a rust preventive method for a cooling pipe or the like which is configured to completely remove the oxygen.

[0008]

SUMMARY OF THE INVENTION The present invention is a rust preventive method for cooling pipes in machines and devices having a large number of cooling water circulation paths, wherein the cooling water circulation is located at the outermost or both ends of the plurality of circulation paths. Leave the passage and block the other cooling water circulation passages with a screw for closing, or connect adjacent cooling water circulation passages by a bypass hose to form one continuous water passage, which is located on the outermost side. One cooling water circulation passage or cooling water circulation passages located at both ends are connected to a container containing an oxygen scavenger, and the oxygen absorber contained in the container causes the cooling water to remain in the pipe. The essential point of the invention is a method for rust prevention of cooling pipes and the like, which is characterized by removing the oxygen that is generated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

A mold generally indicated by A is a known mold for molding synthetic resin, and has a structure in which two mold constituents 1a and 1b are combined so as to be freely contactable and separable.

Reference numerals 11 ... 11 are cooling water circulation passages formed in the mold A, and nipples 2 ... For connecting cooling water supply hoses and the like to the ends of the circulation passages 11 ... 11 as needed. Two
Is installed.

Reference numeral 3 is a known forming roll device, in which a cooling water circulation passage 21 is formed, and nipples 2 for connecting a cooling water supply hose and the like from both ends of the roll device 3.
2 is attached.

Denoted at 4 is a container for containing an oxygen scavenger, which is constructed so that an oxygen scavenger (ageless agent) 41 having an oxygen absorbing ability can be contained in the container body.

The oxygen absorber storage container 4 has a proper number of side surfaces of the container body 42 having a closed structure, or the lid 43, and the attachment portions 44 ... 44 of the connecting hoses 5 and 5 are formed in an appropriate number. .

The amount of the oxygen scavenger 41 stored in the storage container 4 is set according to the scale of the mechanical device to be attached.

Reference numerals 6 ... 6 are bypass hoses, and among the cooling water circulation passages 11 ... 11 formed in a large number in the mold constructing bodies 1a, 1b, circulation passageways located at both ends of the mold constructing bodies 1a, 1b.
By attaching to the other circulation passages 11 ... 11 other than 11, 11, the whole circulation passage formed in the mold is formed into one circulation passage.

As shown in FIG. 6, the connecting means for connecting the deoxidizing agent storage container 4 and the mold A is connected to several connecting hoses 5 ... 5 at several mounting portions 44. As shown in FIG. 7, one connecting hose 5 is drawn out from the oxygen absorber storage container 4, and the tip of the connecting hose 5 is connected to the branching mechanism 7 as shown in FIG. It is also possible to connect the tips of several connecting hoses 51 ... 51 drawn from 7 to the mold A.

In the embodiment, two connecting hoses 5 and 5 are drawn from the oxygen absorber storage container 4 and connected to both ends of the mold A. It is also possible to close one circulation passage and connect the connection hose 5 to only one circulation passage according to the scale of the device or its component parts).

[0019]

According to the present invention, of the cooling water circulation passages 11 ... 11 formed in the mold, the circulation passages 11 ... 11 except for both ends of the mold are connected by the bypass hoses 6 ... The water passage of the whole mold is substantially one continuous water passage, and connecting hoses 5 and 5 drawn from the oxygen absorber storage container 4 are connected to both ends or only one end of this water passage. The complicated work of attaching the rust preventive cap to all circulation paths formed in the mold A as described in the publication is not required, and the economically excellent advantage can be exhibited.

Further, according to the present invention, the container 4 for the oxygen scavenger is constructed in a large size, and the connecting hose 5 drawn out from the container 4 is simply connected to the end of the mold A to circulate the cooling water circulation path. Residual oxygen can be forcibly and completely removed, and the effect of completely preventing oxidative corrosion of the cooling water circulation path caused by residual oxygen can be obtained, and its rust prevention effect is It has the advantage that it can be demonstrated over a long period of time.

Further, according to the method of the present invention, there is an advantage that the amount of the oxygen scavenger used can be freely set according to the scale of the mold for which oxygen is to be removed, and any harmful chemicals are used. There is an advantage that the rust prevention effect can be exhibited without doing so.

[Brief description of drawings]

FIG. 1 is a perspective view of a single die.

FIG. 2 is a front view showing a state in which an oxygen absorber storage container is connected to a molding roll device.

FIG. 3 is a perspective view of an oxygen absorber storage container.

FIG. 4 is a perspective view showing a different structure of the oxygen absorber storage container.

FIG. 5 is a vertical sectional view of a container for storing an oxygen scavenger.

FIG. 6 is a perspective view showing a state in which an oxygen absorber storage container and a mold are connected to each other.

FIG. 7 is a perspective view showing another connection mode of FIG. 6;

[Explanation of symbols] A mold 1a mold structure 1b mold structure 11 cooling water circulation passage 2 nipple 3 molding roll device 4 oxygen absorber container 41 oxygen absorber 42 container body 43 lid 44 connection Hose attachment part 5 Connection hose 51 Connection hose 6 Bypass hose

Claims (1)

[Claims] 1. A method for rust prevention of cooling pipes in machines and devices having a large number of cooling water circulation paths, wherein the cooling water circulation paths located at the outermost or both ends of the plurality of circulation paths are left, The other cooling water circulation passage is closed by a screw for closing, or adjacent cooling water circulation passages are connected by a bypass hose to form one continuous water passage, and the one outermost cooling water Of the cooling water or the cooling water circulation passages at both ends are connected to the container containing the oxygen scavenger, and the oxygen absorber contained in the container removes oxygen remaining in the piping of the cooling water. Anti-corrosion method for cooling pipes, etc.