JP2011025262A - Cooling pipe and cooling unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling pipe and a cooling unit which are capable of detaching an inner pipe from a hose connection member without detaching the outer pipe from a cooling bush. <P>SOLUTION: The cooling pipe 1 is provided with: an outer pipe 3 fitted to a cylindrical cooling bush 2 whose tip is clogged; an inner pipe 5 arranged at the inner part in the radial direction of the outer pipe 3 and opened to the tip; and a hose connection member 7 connecting the outer pipe 3 and the inner pipe 4 at the terminal side, further provided with two connection ports for being connected to cooling liquid hoses 31, 32, and disposed with a first flow passage performing communication from either of the two connection parts to the inner pipe 5 and a second flow passage performing communication from the other of the connection parts to a space between the outer pipe 3 and the inner pipe 5. The terminal part of the hose connection member 7 is provided with an insertion hole 7b into which the inner pipe 5 is inserted to the axial direction, and further, the terminal part of the inner pipe 5 is provided with a fitting part 5b fitted to the insertion hole 7b. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cooling pipe and a cooling unit that are mounted in a cooling hole of a mold used for die casting, injection molding, and the like and cool the mold.

  Conventionally, a cooling pipe having a double pipe structure composed of an outer pipe and an inner pipe and fitting a cooling bush to form an outward path and a return path of the coolant is known (for example, Patent Documents). 1). The cooling pipe includes a hose connection member that connects the outer pipe and the inner pipe at the base end side and is connected to a coolant hose. The hose connection member includes a water inlet connection port that communicates with the inner pipe, and an outer connection port. A water outlet port that leads to a gap between the pipe and the inner pipe is provided.

Japanese Patent Laid-Open No. 9-1313

  However, in the above-described cooling pipe of Patent Document 1, in order to remove the inner pipe from the hose connection member, it is necessary to remove the outer pipe from the cooling bush and push the inner pipe from the tip side. There is a disadvantage that the removing operation is complicated.

  This invention is made | formed in view of said situation, and it aims at providing the cooling pipe and cooling unit which can remove an inner pipe from a hose connection member, without removing an outer pipe from a cooling bush.

The present invention employs the following means in order to solve the above problems.
The present invention relates to an outer pipe that is fitted to a cylindrical cooling bush whose tip is closed, an inner pipe that is disposed radially inward of the outer pipe and that opens at the tip, and the outer pipe and the inner pipe. Two connection ports for connecting to the base pipe side and connecting to an external pipe are provided, a first flow path communicating from one of the two connection parts into the inner pipe, and the connection part A connecting member formed with a second flow path communicating with the space between the outer pipe and the inner pipe from the other, and the inner pipe is inserted in the axial direction at a base end portion of the connecting member A cooling pipe provided with an insertion hole to be fitted and a fitting portion fitted to the insertion hole at the base end portion of the inner pipe is employed.

  According to the cooling pipe of the present invention, when the coolant is supplied to the one connection port provided in the connecting member from the external pipe, the coolant sent from the external pipe is the first formed in the connecting member. It flows into the inner pipe through the flow path. Thereafter, the coolant flows through the inside of the inner pipe from the proximal end side toward the distal end side, and flows out into the cooling bush from the opening at the distal end of the inner pipe. Since the cooling bush is closed at the tip, the coolant that has reached the tip of the cooling bush passes through the gap between the inner pipe and the cooling bush, or the gap between the inner pipe and the outer pipe fitted to the cooling bush. It circulates from the side toward the base end side. Thereafter, the coolant flows out to the other connection port through the second flow path formed in the connecting member, and is sent to an external pipe. Thus, according to the cooling pipe of the present invention, the cooling liquid can be circulated inside the cooling bush, and the mold in which the cooling bush is inserted by transferring the heat outside the cooling bush to the cooling liquid. The object to be cooled such as can be cooled.

  Here, in the cooling pipe of the present invention, an insertion hole for the inner pipe is provided at the base end portion of the connecting member, and a fitting portion that fits into the insertion hole is provided at the base end portion of the inner pipe. Yes. Therefore, by inserting the inner pipe from the insertion hole of the connecting member and fitting the fitting portion of the inner pipe into the insertion hole, the inner pipe can be freely detached from the connecting member. Thereby, the inner pipe can be detached from the connecting member without removing the outer pipe from the cooling bush. Accordingly, it is possible to eliminate the necessity of removing external piping connected to the connecting member when removing the inner pipe. Therefore, when the inner pipe is cleaned or exchanged, the removal work can be facilitated.

In the cooling pipe, a female screw is formed on the inner peripheral surface of the insertion hole of the connecting member, and a male screw is formed on the outer peripheral surface of the fitting portion of the inner pipe. A prismatic part having a side surface in the direction along the axis may be provided.
By doing in this way, an inner pipe can be easily attached or detached to a connection member by rotating a square column part around an axis line with tools, such as a spanner.

Said cooling pipe WHEREIN: It is good also as having a ring-shaped sealing member which seals the clearance gap between the said connection member and the said inner pipe in the said fitting part.
By doing in this way, since the sealing member can seal the inner surface of the insertion hole of the connecting member and the outer surface of the fitting portion of the inner pipe, the coolant supplied to the inner portion of the connecting member is connected to the inner pipe and the connecting member. It is possible to prevent leakage from the gap.

In the above cooling pipe, the connection port may be provided with a one-touch joint for connecting a coolant hose.
In this way, the coolant hose can be quickly and easily connected to the connection port.

The present invention employs a cooling unit comprising any one of the above cooling pipes, and a cylindrical cooling bush fitted to the cooling pipe and closed at the tip inserted into a cooling hole formed in the object to be cooled. To do.
According to the cooling unit of the present invention, the cooling unit is set to the object to be cooled by inserting the cooling bush into the cooling hole formed in the object to be cooled such as a mold and attaching the cooling pipe to the cooling bush. The According to the cooling unit of the present invention, since the cooling pipe is provided, the inner pipe can be detached from the connecting member without removing the outer pipe from the cooling bush, and the inner pipe is cleaned or replaced. In this case, the removing operation can be facilitated.

  According to the present invention, it is possible to remove the inner pipe from the hose connecting member without removing the outer pipe from the cooling bush.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining schematic structure of the cooling pipe which concerns on one Embodiment of this invention, (a) is a longitudinal cross-sectional view of an axial direction, (b) is the front view seen from the base end side. It is a figure explaining the state at the time of removing the inner pipe of the cooling pipe of FIG. 1, (a) is a longitudinal cross-sectional view of an axial direction, (b) is the front view seen from the base end side. It is a longitudinal cross-sectional view explaining the schematic structure of the conventional cooling pipe.

Hereinafter, a cooling pipe and a cooling unit according to an embodiment of the present invention will be described with reference to the drawings.
The cooling unit 100 according to the present embodiment includes a cooling pipe 1 according to the present embodiment, a cooling bush 2 inserted into a die casting mold or the like, and a cooling liquid supply device (not shown) for supplying a cooling liquid to the cooling pipe 1. And cooling the object to be cooled by circulating a cooling liquid through the cooling bush.

1A and 1B are diagrams illustrating a schematic configuration of a cooling pipe 1 according to the present embodiment. FIG. 1A is a longitudinal sectional view of the cooling pipe 1 in an axial direction, and FIG. 1B is a view from the base end side of the cooling pipe 1. FIG.
As shown in FIG. 1A, the cooling pipe 1 connects the outer pipe 3, the inner pipe 5 disposed radially inward of the outer pipe 3, and the outer pipe 3 and the inner pipe 5. A hose connection member (connection member) 7 to which the coolant hoses 31 and 32 are connected is provided as a main component.

  The outer pipe 3 is fitted into a bottomed hole formed in the mold A or a cylindrical cooling bush 2 whose tip is closed. A male screw portion 3c used when connecting to the mold A or the cooling bush is formed at the tip of the outer pipe 3. On the other hand, a male screw portion 3 a used when connecting to the hose connecting member 7 is formed at the base end portion of the outer pipe 3.

  The inner pipe 5 is a pipe that opens at the tip, and is longer than the outer pipe 3 in the axial direction. The inner pipe 5 has the same axis as that of the outer pipe 3 and is disposed radially inward of the outer pipe 3. The inner pipe 5 is provided with an opening 5a at a position closer to the base end side than a partition wall 17 described later.

FIG. 2 shows a state when the inner pipe 5 is removed from the hose connecting member 7 in the cooling pipe 1 of FIG. 1, (a) is a longitudinal sectional view in the axial direction of the cooling pipe 1, and (b) is It is the front view seen from the base end side of the inner pipe.
As shown in FIG. 2A, an insertion hole 7 b into which the inner pipe 5 is inserted in the axial direction is provided at the proximal end portion of the hose connection member 7. A fitting portion 5 b that fits into the insertion hole 7 b of the hose connection member 7 is provided at the proximal end portion of the inner pipe 5.

  A female screw is formed on the inner peripheral surface of the insertion hole 7 b of the hose connecting member 7, and a male screw is formed on the outer peripheral surface of the fitting portion 5 b of the inner pipe 5. Further, a hexagonal portion (rectangular column portion) 5c having a side surface in a direction along the axis is provided at the base end portion of the inner pipe 5. In this way, the inner pipe 5 can be easily attached to and detached from the hose connecting member 7 by rotating the hexagonal portion 5c around the axis with a tool such as a spanner.

  A ring-shaped seal member 19 is provided at the base end portion of the inner pipe 5. The seal member 19 seals the insertion hole 7b of the hose connection member 7 and the fitting portion 5b of the inner pipe 5. Thereby, the coolant is prevented from leaking from the gap between the insertion hole 7b and the fitting portion 5b.

  The hose connection member 7 includes a cylindrical cylindrical member 10 and a casing 20 that houses the cylindrical member 10. The cylindrical member 10 is inserted into the casing 20 in the axial direction thereof, and is fitted into the casing 20. The casing 20 is attached to the cylindrical member 10 so as to be rotatable around its axis.

  The axial movement between the cylindrical member 10 and the casing 20 is restricted by the base end portion 7 c of the hose connecting member 7 and a retaining ring (C-shaped retaining ring) 30. The retaining ring 30 has a C shape with one end open, and can be removed from the cylindrical member 10.

  The cylindrical member 10 is connected to the outer pipe 3 through a female screw hole 7a formed at the distal end side, and is connected to the inner pipe 5 through an insertion hole 7b formed at the base end portion. The cylindrical surface of the cylindrical member 10 is provided with two openings 12 and 13 that open at intervals in the longitudinal axis direction.

  Inside the cylindrical member 10, a partition wall 17 is provided between the opening 12 and the opening 13 and divides the inside of the cylindrical member 10 in the longitudinal axis direction. The partition wall 17 is provided with a through hole that allows the inner pipe 5 to pass therethrough. A ring-shaped seal member 18 is provided on the inner pipe 5 at the axial position of the through hole. The seal member 18 seals the internal spaces of the cylindrical member 10 divided by the partition wall 17.

  With the above configuration, a first flow path that communicates from the opening 12 into the inner pipe 5 is formed inside the cylindrical member 10 at a position closer to the base end than the partition wall 17. In addition, a second flow path that communicates from the opening 13 to the space between the outer pipe 3 and the inner pipe 5 is formed in the cylindrical member 10 at a position on the tip side of the partition wall 17.

  The cylindrical surface of the cylindrical member 10 is provided with circumferential grooves (not shown) formed over the entire circumference at axial positions corresponding to the openings 12 and 13. Accordingly, an annular gap is formed between the cylindrical surface of the cylindrical member 10 and the cylindrical inner surface of the casing 20 at the axial position corresponding to the openings 12 and 13.

  The casing 20 has a first casing 21 and a second casing 22 that are divided in the axial direction corresponding to the openings 12 and 13 of the cylindrical member 10. The first casing 21 and the second casing 22 are connected so as to be relatively rotatable about the axis.

  The first casing 21 and the second casing 22 each have a cylindrical inner surface into which the cylindrical surface of the cylindrical member 10 is fitted, and accommodates the cylindrical member 10 so as to be rotatable about its axis. The first casing 21 and the second casing 22 are provided with connection ports for connection to the coolant hoses 31 and 32, respectively.

  A one-touch joint 33 is provided at the connection port on the base end side, and a coolant hose 31 for supplying a coolant is connected to the one-touch joint 33. A one-touch joint 34 is provided at the connection port on the distal end side, and a coolant hose 32 for discharging the coolant is connected to the one-touch joint 34. Thus, by providing the one-touch joints 33 and 34 at the respective connection ports, the coolant hoses 31 and 32 can be connected quickly and easily.

  On the cylindrical inner surface of the first casing 21, ring-shaped seal members 41 and 42 are provided on both sides in the axial position of the circumferential groove of the cylindrical member 10. The seal members 41 and 42 seal an annular gap formed between the cylindrical surface of the cylindrical member 10 and the cylindrical inner surface of the first casing 21.

  Similarly to the first casing 21, ring-shaped seal members 43 and 44 are provided on the cylindrical inner surface of the second casing 22 on both sides in the axial direction of the circumferential groove of the cylindrical member 10. The seal members 43 and 44 are configured to seal an annular gap formed between the cylindrical surface of the cylindrical member 10 and the cylindrical inner surface of the second casing 22.

  With the above configuration, the opening 12 on the base end side provided on the cylindrical surface of the cylindrical member 10 communicates with the inside of the inner pipe 5 through the first flow path. The opening 12 communicates with the coolant hose 31 via the one-touch joint 33 through a gap between the cylindrical surface of the cylindrical member 10 and the cylindrical inner surface of the first casing 21. As a result, a flow path that connects the inside of the inner pipe 5 and the inside of the coolant hose 31 through the opening 12 is formed. This flow path is used as a forward path for the coolant by supplying the coolant from the coolant hose 31.

  Further, the opening 13 on the distal end side provided on the cylindrical surface of the cylindrical member 10 communicates with the space between the outer pipe 3 and the inner pipe 5 through the second flow path. Further, the opening 13 communicates with the coolant hose 32 through the one-touch joint 34 through a gap between the cylindrical surface of the cylindrical member 10 and the cylindrical inner surface of the second casing 22. As a result, a flow path that connects the space between the outer pipe 3 and the inner pipe 5 and the inside of the coolant hose 32 through the opening 13 is formed. This flow path is used as a return path for the coolant by discharging the coolant from the coolant hose 32.

Next, the operation of the cooling pipe 1 having the above configuration will be described below.
As shown in FIG. 1A, the coolant sent from the coolant hose 31 passes through the connection port provided in the first casing 21 and the cylindrical surface of the cylindrical member 10 and the cylinder of the first casing 21. It flows into the gap with the inner surface. Thereafter, the coolant flows through the gap into the opening 12 provided in the cylindrical member 10, and flows into the inner pipe 5 through the first flow path formed in the cylindrical member 10. Thereafter, the coolant flows through the inner pipe 5 from the proximal end side toward the distal end side, and flows out into the cooling bush 2 from the opening at the distal end of the inner pipe 5.

  Since the cooling bush 2 is closed at the tip, the coolant that has reached the tip of the cooling bush 2 passes through the gap between the inner pipe 5 and the cooling bush 2 and the gap between the inner pipe 5 and the outer pipe 3 on the tip side. Circulates toward the base end side. Thereafter, the coolant flows into the cylindrical member 10, passes through the second flow path formed in the cylindrical member 10, and passes through the opening 13 provided in the cylindrical member 10 and the cylindrical surface of the cylindrical member 10. 2 flows out into a gap between the inner surface of the casing 22 and the cylindrical inner surface. Thereafter, the coolant passes through this gap and is sent to the coolant hose 32 from the connection port provided in the second casing 22.

  As described above, according to the cooling pipe 1 of the present embodiment, the cooling liquid can be circulated inside the cooling bush 2, and heat from the outside of the cooling bush 2 is transferred to the cooling liquid so that the cooling bush 2 The inserted mold A can be cooled.

Next, the operation | work at the time of removing the inner pipe 5 in the cooling pipe 1 of this embodiment is demonstrated.
First, as a comparative example, an operation for removing an inner pipe in a conventional cooling pipe will be described with reference to FIG.
As shown in FIG. 3, the conventional cooling pipe 51 is provided with an in-bush 55c inserted into the hose connecting member 57 at the base end portion of the inner pipe 55, and a hexagonal hollow screw 56 is fitted into the in-bush 55c. It is set as the structure.

  According to the conventional cooling pipe 51 having the above configuration, in order to remove the inner pipe 55 from the hose connecting member 57, the in-bush 55c provided on the inner pipe 55 and the hexagonal hollow screw 56 are separated. Therefore, it is necessary to remove the outer pipe 53 from the cooling bush 52 inserted into the mold A and push out the inner pipe 55 from the tip side. Further, in order to remove the outer pipe 53 from the cooling bush 52, it is necessary to rotate the hose connection member 57 around the axis, and thus the coolant hoses 31 and 32 must be removed from the hose connection member 57. Therefore, when performing maintenance such as cleaning of the inner pipe 55, there is an inconvenience that the removing operation is complicated.

  In contrast, in the cooling pipe 1 according to the present embodiment, the insertion hole 7b of the inner pipe 5 is provided at the proximal end portion of the hose connection member 7, and the insertion hole 7b is provided at the proximal end portion of the inner pipe 5. A fitting portion 5b to be fitted is provided. Therefore, as shown in FIG. 2 (a), the inner pipe 5 is inserted from the insertion hole 7b of the hose connection member 7, and the fitting portion 5b of the inner pipe 5 is fitted into the insertion hole 7b, thereby connecting the hose. The inner pipe 5 can be freely attached to and detached from the member 7. Thereby, the inner pipe 5 can be detached from the hose connecting member 7 without removing the outer pipe 3 from the cooling bush 2. Accordingly, it is possible to eliminate the necessity of removing the coolant hoses 31 and 32 connected to the hose connecting member 7 when removing the inner pipe 5. Therefore, when the inner pipe 5 is cleaned or replaced, the removal work can be facilitated.

  In the cooling pipe 1 according to the present embodiment, the casing 20 provided with a connection port to which the coolant hoses 31 and 32 are connected is attached to be rotatable around the axis of the cylindrical member 10. Thereby, the direction in which the coolant hoses 31 and 32 are connected can be freely changed, and the degree of freedom in handling the coolant hoses 31 and 32 can be improved. As a result, it is possible to effectively use the surrounding space and improve workability when attaching the coolant hoses 31 and 32 to the connection ports.

Further, in the cooling pipe 1 according to the present embodiment, the first casing 21 to which the coolant hose 31 is connected and the second casing 22 to which the coolant hose 32 is connected are provided so as to be relatively rotatable. ing.
By doing in this way, the direction to which the coolant hose 31 is connected and the direction to which the coolant hose 32 are connected can be made into different directions. Thereby, the freedom degree of management of each hose can be improved, while working effectively, the workability | operativity at the time of attaching the coolant hoses 31 and 32 can be improved further.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, although the base end portion of the inner pipe 5 has been described as being provided with the hexagonal portion 5c, the shape may be a shape that can be removed with a commercially available tool such as a spanner or a wrench. It is good also as a shape.

A Mold 1 Cooling pipe 2 Cooling bush 3 Outer pipe 5 Inner pipe 5b Fitting part 5c Hexagon part 7 Hose connecting member (connecting member)
7b Insertion hole 10 Cylindrical members 12, 13 Opening portion 20 Casing 21 First casing 22 Second casing 31, 32 Coolant hoses 33, 34 One-touch joints 41, 42, 43, 44 Seal member 100 Cooling unit

Claims (5)

An outer pipe fitted to a cylindrical cooling bush whose tip is closed;
An inner pipe disposed radially inward of the outer pipe and opening at the tip;
The outer pipe and the inner pipe are connected at the base end side, and two connection ports for connecting to the external pipe are provided, and a first flow that communicates into the inner pipe from one of the two connection portions. A connecting member formed with a path and a second flow path communicating with the space between the outer pipe and the inner pipe from the other of the connecting portions;
An insertion hole into which the inner pipe is inserted in the axial direction is provided at the base end portion of the connecting member, and a fitting portion to be fitted into the insertion hole is provided at the base end portion of the inner pipe. Cooling pipe.   A female screw is formed on the inner peripheral surface of the insertion hole of the connecting member, a male screw is formed on the outer peripheral surface of the fitting portion of the inner pipe, and a side surface in a direction along the axis line at the proximal end portion of the inner pipe. The cooling pipe according to claim 1, further comprising a prismatic portion having the following.   The cooling pipe according to claim 1, wherein the fitting portion includes a ring-shaped seal member that seals a gap between the connection member and the inner pipe.   The cooling pipe according to any one of claims 1 to 3, wherein a one-touch joint for connecting a coolant hose is provided at the connection port. The cooling pipe according to any one of claims 1 to 4,
A cooling unit including a cylindrical cooling bush fitted to the cooling pipe and closed at a tip inserted into a cooling hole formed in an object to be cooled.

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