JP2004090518A - Cooling device for mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device which cools down a mold efficiently and is also excellent in maintenance. <P>SOLUTION: For the purpose of maintenance or the like, an inner pipe 4 alone is taken out as an outer pipe 3 is left fitted to a mold 2. When a cap 22 is removed on the occasion, a deformed hole 21 in the rear end part of the inner pipe 4 is seen. Then, a tool such as a wrench is inserted into the deformed hole 21 and the inner pipe 4 is turned. Thereby, the inner pipe 4 alone is taken out. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mold cooling device for lowering the temperature of a casting mold or the like.
[0002]
[Prior art]
If the temperature of the mold is high, the molten metal hardly solidifies and it takes time to release. Therefore, the mold itself is conventionally cooled. Although various cooling structures have been proposed, Japanese Unexamined Utility Model Publication No. 59-54155 or Japanese Unexamined Utility Model Publication No. 2-123352 proposes a cooling device having a double pipe structure.
[0003]
Japanese Utility Model Application Laid-Open No. 59-54155 discloses a conventional cooling device in which an inner portion of an inner pipe is used as a cooling water outward path and a cooling water return path is provided between the inner pipe and the outer pipe. There has been proposed a cooling device in which a partition plate is provided in the pipe in the axial direction and divided into a forward path and a return path of cooling water.
[0004]
In Japanese Utility Model Laid-Open No. 2-123352, a tubular head is provided at the rear of a double pipe structure, and the inside of the head is defined by partition walls in front and rear chambers, and cooling water is supplied to the rear chamber. The cooling water used for cooling is taken out of the front room.
[0005]
Of the cooling devices disclosed in Japanese Utility Model Laid-Open No. 59-54155, those having a simple double pipe structure merely push the tip into a mold, causing rattling and leakage of cooling water from the insertion portion. Cheap. In addition, since the fixing pipe (base) connecting the hoses for supplying and recovering the cooling water is fixed to the outer pipe, the direction of the fixing pipe cannot be changed, and a large number of cooling devices are used as molds. Attachment pipes interfere with each other when they are attached to the unit, and it takes a long time and experience to perform the attachment work.
In addition, the cooling device disclosed in Japanese Utility Model Laid-Open No. 2-123352 not only has a complicated structure, but also cannot change the direction of the fastening tube connecting the hoses, as described above, so that the mounting operation requires a long time and experience. Cost.
Further, it is difficult for any of the cooling devices to separate the inner pipe and the outer pipe, and there is a problem in maintenance when cooling water is clogged or the like.
[0006]
Then, the cooling device shown in FIG. 7 is known. In this cooling device 100, an outer pipe 103 and an inner pipe 104 are coaxially attached to a joint 102. That is, the screw part 103a formed on the inner side of the rear end of the outer pipe 103 is screwed into the screw part 102a formed on the outer periphery of the front end of the joint 2, and the rear end of the inner pipe 104 is press-fitted into the joint 102. The rear end opening of the inner pipe 104 is closed with a plug 105, and the screw part 103b engraved outside the front end part of the outer pipe 103 is screwed into the screw part 201b formed in the mounting hole 201 of the mold 200 for cooling. The device 100 is fixed to a mold 200.
[0007]
A nut 106 is provided on the outer periphery of the joint 102, and an adapter 107 for supplying and discharging cooling water is attached to the outer periphery of the joint 102 behind the nut 106. The adapter 107 is provided with a forward ring member 108 and a return ring member 109 rotatably provided around the axis of the joint 102, a forward hose fixing tube 110 and a backward hose stop fixed to these ring members 108 and 109. Cooling water hoses 112 and 113 are fitted to the fixing tubes 110 and 111. Incidentally, reference numeral 114 denotes a stopper.
[0008]
A flow channel is formed on the inner circumference of the ring members 108 and 109 over the entire circumference, and the cooling water from the cooling water hose 112 is supplied to the forward hose connecting tube regardless of the rotational position of the ring member. The cooling water supplied to the outward path 115 of the cooling water through the flow channel 110 and returned to the return path 116 of the cooling water after cooling the mold is cooled by the flow channel, the return hose fixing pipe 111 and the hose 113. Is collected via
[0009]
[Problems to be solved by the invention]
In the cooling device shown in FIG. 7, in order to easily perform maintenance for removing clogging of scale, etc., as shown in FIG. 4 is pulled out of the outer pipe 103 integrally.
[0010]
However, the nut portion 106 is hidden inside the ring member, and the workability is extremely poor. Further, depending on the mold, there are cases where two cooling devices are close to each other as shown in FIG. 7, and in such a case, there is no space for passing a spanner.
[0011]
Furthermore, in the apparatus shown in FIG. 7, the forward and backward ring members have exactly the same shape, and there is no differentiating joint for assembling them. Therefore, the in and out may be erroneously assembled.
[0012]
[Means for Solving the Problems]
In order to solve the above problem, a cooling device for a mold according to the present invention includes an inner pipe disposed in an outer pipe, and an inner portion of the inner pipe and one between the inner pipe and the outer pipe is used as a forward path of cooling water. A cooling system for a mold having a double pipe structure in which the cooling water is returned on the return path, wherein the outer pipe and the inner pipe are screwed together at a portion from the rear end, and the inner pipe is provided with an outer pipe at an inner diameter of the inner pipe. It has a configuration in which a deformed hole into which a jig is inserted when attaching / detaching to / from a pipe is formed.
With this configuration, it is possible to attach and detach the inner pipe from the front while keeping the outer pipe fixed to the mold.
[0013]
In addition, the cooling device may have a structure including an adapter. This adapter includes a forward ring member and a backward ring member rotatably provided around an axis, and a forward hose fastening tube and a backward hose fastening tube fixed to these ring members. In addition, a flow channel is formed in the outer peripheral portion of the outer pipe so that a flow channel is formed regardless of the rotational position of the ring member. If this channel groove is formed in the inner peripheral portion of the ring member, the O-ring may be damaged, so it is preferable to form the channel groove in the outer pipe.
[0014]
Further, the inner diameters of the outward ring member and the return ring member are made different, and the rear end portion of the outer pipe is also formed into a stepped shape having a different outer diameter, and a ring member corresponding to the outer diameter is attached to these different diameter portions. This prevents erroneous assembly.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a cooling device according to the present invention, FIG. 2 is an enlarged cross-sectional view of a rear portion of an inner pipe, and FIG.
[0016]
The cooling device 1 has a screw portion 2b formed in a mold 2 formed in a cooling device mounting hole 2a, and a screw portion 3b at the tip of the outer pipe 3 screwed into the screw portion 2b. Are mounted coaxially. That is, a screw portion 3c is formed at the rear inner periphery of the outer pipe 3, while a nut member 41 is welded to the rear end of the inner pipe 4 as shown in FIG. The screw portion 4c is screwed to the screw portion 3c of the outer pipe 3.
[0017]
An adapter 7 is provided on the outer periphery of the rear end of the outer pipe 3. The adapter 7 includes a forward ring member 8 and a return ring member 9 rotatably mounted on the outer periphery of the outer pipe 3, a forward hose fastening tube 10 mounted on the forward ring member 8 and the return ring member 9, and a return path. And a hose connecting tube 11.
[0018]
Further, the inside of the inner pipe 4 is provided with a forward path 15 of the cooling water, and the space between the outer pipe 3 and the inner pipe 4 is provided with a return path 16 of the cooling water. An opening 18 for collecting the cooling water from the opening 17 and the return path 16 of the cooling water is formed.
On the outer periphery of the outer pipe 3, there are formed flow passage grooves 17a, 18a facing the openings 17, 18, respectively.
[0019]
The ring members 8 and 9 are formed with flow paths 19 and 20 that open to the flow grooves 17a and 18a. Thus, irrespective of the rotational position of the ring members 8 and 9, the cooling water from the cooling water hose 12 is supplied to the cooling water through the forward hose fastening tube 10, the flow path 19, the flow groove 17 a and the opening 17. The cooling water supplied to the outward path 15 and returned to the return path 16 of the cooling water after cooling the mold passes through the opening 18, the flow channel 18 a, the flow path 20, the return hose fixing pipe 11 and the hose 13. Collected.
Here, even if it is close to an adjacent cooling device, the ring members 8 and 9 can be rotated to an arbitrary position, so that interference between the hose fixing tubes 10 and 11 can be prevented.
[0020]
On the other hand, a deformed hole (hexagonal hole) 21 is formed in the nut member 41 by broaching, and a rear end opening of the outer pipe 3 is closed by a removable cap 22 in a watertight manner.
[0021]
To take out only the inner pipe 4 with the outer pipe 3 attached to the mold 2 for the purpose of maintenance or the like, when the cap 22 is removed, the deformed hole 21 at the rear end of the inner pipe 4 can be seen. By inserting the inner pipe 4 into the modified hole 21 and turning the inner pipe 4, only the inner pipe 4 can be pulled out as shown in FIG.
[0022]
FIG. 5 is a cross-sectional view of an outer pipe of a cooling device according to another embodiment, and FIG. 6 is an enlarged view of a main part of FIG. 5. In this embodiment, the outer end of the outer pipe 3 has a small diameter portion 30a and a large diameter portion 30a. The outer ring member 8 and the return ring member 9 also have different diameters. The outward ring member 8 is provided on the small diameter portion 30a, and the return ring member is provided on the large diameter portion 30b. 9 are attached.
[0023]
In this way, by making the diameter of the outer end of the outer pipe 3 and the diameter of the ring members 8 and 9 different, it is possible to prevent erroneous assembly. In the figure, reference numeral 31 denotes an O-ring groove.
[0024]
【The invention's effect】
As described above, according to the cooling device according to the present invention, since the cooling device can be securely fixed to the mold, leakage of the cooling water can be effectively prevented, and a large number of cooling devices can be concentrated into one. Even when the cooling water hose is attached to the mold, the fixing pipe for attaching the cooling water hose is rotatable around the outer pipe or the joint, so that it does not interfere with the fixing pipe of the adjacent cooling device.
[0025]
Also, if the outer pipe and the inner pipe are attached coaxially via a joint and the outer pipe and the joint are screwed together, the joint and the inner pipe can be easily removed with the outer pipe left in the mold Can be.
[0026]
Similarly, by screwing the rear end of the inner pipe to the outer pipe and forming a deformed hole in the inner pipe, the inner pipe can be removed while the cooling device remains attached to the mold, Maintainability is greatly improved.
[Brief description of the drawings]
1 is a cross-sectional view of a cooling device according to the present invention; FIG. 2 is an enlarged cross-sectional view of a rear portion of an inner pipe; FIG. 3 is a view in the direction of arrow A in FIG. 2; FIG. 5 is an exploded view of an example. FIG. 5 is a cross-sectional view of an outer pipe of a cooling device according to another embodiment. FIG. 6 is an enlarged view of a main part of FIG. FIG. 7 shows an exploded state of the cooling device in FIG. 7.
DESCRIPTION OF SYMBOLS 1 ... Cooling device, 2 ... Die, 2a ... Mounting hole of the cooling device formed in the mold, 2b ... Screw part formed in the mold, 3 ... Outer pipe, 3b, 3c ... Screw part formed in the outer pipe, DESCRIPTION OF SYMBOLS 4 ... Inside pipe, 4c ... Thread part formed in the inside pipe, 7 ... Adapter, 8 ... Outbound ring member, 9 ... Inbound ring member, 10 ... Outbound hose fastening tube, 11 ... Inbound hose fastening tube , 12, 13 ... cooling water hose, 14 ... stopper, 15 ... cooling water forward path, 16 ... cooling water return path, 17, 18 ... opening, 17a, 18a ... flow channel, 19, 20 ... flow path, 21 … Deformed hole (hexagonal hole), 22… Cap.

Claims (3)

A cooling device for a mold having a double pipe structure in which an inner pipe is disposed inside an outer pipe, and one of an inner portion of the inner pipe and one between the inner pipe and the outer pipe is a forward path of cooling water and the other is a return path of cooling water. In the above, the outer pipe and the inner pipe are screwed at a portion from the rear end, and a deformed hole for inserting a jig when attaching / detaching the inner pipe to / from the outer pipe is formed in an inner diameter portion of the inner pipe. A mold cooling device. 2. The mold cooling device according to claim 1, wherein the cooling device includes an adapter, and the adapter is fixed to the forward and backward ring members provided rotatably around the axis, and the ring members. A cooling device for a mold, comprising a forward hose connecting tube and a returning hose connecting tube, wherein a flow channel is formed in an outer peripheral portion of the outer pipe. The mold cooling device according to claim 2, wherein the forward ring member and the backward ring member have different inner diameters, and the rear end of the outer pipe has a stepped shape having a different diameter. A cooling device for a mold, wherein a ring member corresponding to the diameter is mounted.

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