JP6461750B2 - Cooling pipe and mold cooling mechanism - Google Patents

Description

  The present invention relates to a cooling pipe and a mold cooling mechanism for cooling a mold used for die casting or the like.

  In general, a mold used for die casting, injection molding, or the like is provided with a cooling pipe for cooling the mold and a mold cooling mechanism using the cooling pipe. For example, as a cooling pipe and mold cooling mechanism, a plurality of cooling holes are formed in a mold, a cooling pipe is inserted into these cooling holes, and a cooling fluid such as cooling water is supplied from the cooling pipe into the cooling hole. It has a structure for cooling the mold.

For example, in Patent Document 1, an inner pipe is arranged in an outer pipe to form a cooling water forward path and a return path, and a cooling water inlet connection port and a return path are connected to one end side of the outer pipe and the inner pipe. The cooling pipe for metal mold | dies with which the hose connection cap provided with the outflow connection port leading to is attached is described.
Patent Document 2 describes a cooling pipe in which a holder to which an outgoing pipe and a return pipe are connected is fixed to an opening of a cooling hole in which a cooling pipe is inserted.

Japanese Patent Laid-Open No. 2004-154796 JP-A-6-315751

In the above conventional technique, the following problems remain.
In other words, in the conventional technology, the connecting portion of the cooling fluid supply hose (outward piping) and the connecting portion of the discharge hose (return piping) are fixed in a certain direction, so that the hose can be freely routed. There was an inconvenience that the degree was low. Also, when removing the cooling pipe inserted in the cooling hole, it is necessary to remove both the supply hose and the discharge hose, and to remove the connected base and holder from the mold. There was a problem that it took.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a cooling pipe and a mold cooling mechanism that have a high degree of freedom in handling a supply hose and a discharge hose and are excellent in maintainability. And

  The present invention employs the following configuration in order to solve the above problems. That is, the cooling pipe according to the first invention is a cooling pipe that is inserted into a cooling hole formed in a mold and supplies a cooling fluid into the cooling hole, and is supplied to the inside from a supply port on the base end side. An inner pipe that discharges the cooling fluid from the opening on the distal end side into the cooling hole, a proximal end member fixed to a proximal end portion of the inner pipe, and a proximal end portion attached to the proximal end member, A pipe disposed inside with a gap therebetween, and an outer pipe that discharges the cooling fluid in the cooling hole from the base end side to the outside through the gap, and the base end member has the cooling on the base end side outer peripheral surface A fluid supply hose is connectable and has a first connection portion communicating with the supply port, and the outer pipe communicates with the gap so that a cooling fluid discharge hose can be connected to the outer peripheral surface of the base end side. A second connecting portion, wherein the base end member is the outer side. Characterized in that mounted for and releasably rotate axially direction with respect to type.

  In the cooling pipe of the present invention, the base end member is attached to the outer pipe so as to be rotatable and detachable in the axial direction. Therefore, by rotating the base end member with respect to the outer pipe, The direction of the first connection portion can be freely changed with respect to the second connection portion of the pipe, and the degree of freedom in handling the discharge hose and the supply hose can be improved. Also, if you want to remove the inner pipe for maintenance, etc., the base end member to which the supply hose is connected can be removed from the outer pipe, so that the outer pipe and the discharge hose remain attached to the mold together with the base end member. The inner pipe can be removed.

The cooling pipe according to a second aspect of the present invention is the cooling pipe according to the first aspect, wherein the base end member is provided on the distal end side with respect to the male screw portion provided on the base end side outer periphery and the male screw portion on the base end outer periphery. An inner seal member that can be in close contact with the inner peripheral surface of the pipe, and the outer pipe is provided on the inner peripheral surface and an outer seal member that is provided on the outer periphery of the tip portion and can be in close contact with the inner peripheral surface of the cooling hole. It has a female screw part that can be screwed to the male screw part, and a space part that is provided on the inner peripheral surface and is adjacent to the axially leading end side of the female screw part and can accommodate the male screw part. And
In this cooling pipe, since the base end member has a male screw portion and an inner seal member, and the outer pipe has a female screw portion and a space portion, leakage is prevented by the inner seal member. By arranging the male screw part in the space part beyond the female screw part, the inner pipe and the base end member can be prevented from being detached and the rear end side can be positioned.

  That is, when the cooling pipe is inserted into the cooling hole and attached, the outer pipe is first pushed into the cooling hole and attached. At this time, the outer seal member is in close contact with the inner peripheral surface of the cooling hole, whereby the outer pipe is fixed to the cooling hole, and leakage of the cooling fluid from between the outer pipe and the cooling hole is prevented. Next, the inner pipe to which the base end member is fixed is inserted into the outer pipe, and the distal end side is inserted into the cooling hole. At this time, the male screw portion is screwed into the female screw portion from the outside, and the base end member is turned into the space formed on the distal end side of the male screw portion to feed the male screw portion. In this state, the male thread part that has been fed into the space part is removed from the female thread part, but unless the base end member is rotated in a screwable direction, the female thread part functions as a stopper, so that it moves to the rear end side. Is regulated and positioned.

Further, in the state where the male thread portion is arranged in the space portion, only the base end member can be rotated with respect to the outer pipe without changing the axial position, and the connection direction of the supply hose and the discharge hose can be changed. It can be easily adjusted separately. That is, the take-out directions (connection directions) of the two cooling fluid hoses are not fixed to each other, and a high degree of freedom in the axial rotation direction is obtained.
Also, when removing the inner pipe, the male screw part in the space is screwed into the female screw part from the inner side (front end side) by rotating the base end member in the direction opposite to the mounting direction while pulling the base end member in the rear end direction. In addition, the base end member and the inner pipe can be easily detached from the outer pipe by taking out the female screw portion to the outside, and the maintenance becomes easy.

  A mold cooling mechanism according to a third aspect of the present invention includes a cooling hole formed in a mold and a cooling pipe that is inserted into the cooling hole and supplies a cooling fluid into the cooling hole. Or it is the cooling pipe of 2nd invention, It is characterized by the above-mentioned.

The present invention has the following effects.
That is, according to the cooling pipe and the mold cooling mechanism of the present invention, since it is pivotably and detachably attached to the outer pipe, the degree of freedom in handling the discharge hose and the supply hose The inner pipe can be removed together with the base end member while the outer pipe and the discharge hose are attached to the mold.
In addition, since the base end member has a male screw portion and an inner seal member, and the outer pipe has a female screw portion and a space portion, leakage is prevented by the inner seal member, and the inner pipe and the base member are also prevented. The end member can be prevented from coming off and the rear end side can be positioned.
Therefore, in the cooling pipe and the mold cooling mechanism of the present invention, a high degree of freedom in handling between the supply hose and the discharge hose can be obtained, and excellent maintainability can be obtained.

1 is a cross-sectional view showing a state where a cooling pipe is attached to a mold in an embodiment of a cooling pipe and a mold cooling mechanism according to the present invention. In this embodiment, it is an expanded sectional view which shows the base end part of a cooling pipe. It is an expanded sectional view which shows the part (part by which the external thread part was accommodated in the space part) enclosed by the A line of FIG. In this embodiment, it is sectional drawing which shows an outer side pipe. In this embodiment, it is sectional drawing which shows the inner side pipe to which the base end member was fixed.

  Hereinafter, an embodiment of a cooling pipe and a mold cooling mechanism according to the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the mold cooling mechanism 1 in this embodiment includes a cooling hole 3 formed in the mold 2 and a cooling fluid such as cooling water inserted into the cooling hole 3 in the cooling hole 3. And a cooling pipe 4 to be supplied. A plurality of cooling holes 3 are formed in the mold 2, and a cooling pipe 4 is attached to each cooling hole 3.
The mold 2 includes a nesting 2A and a main mold 2B installed outside the nesting 2A.

  As shown in FIGS. 1 to 3, the cooling pipe 4 includes an inner pipe 5 that discharges the cooling fluid supplied to the inside from the supply port 5a on the proximal end side into the cooling hole 3 from the opening 5b on the distal end side. The base end member 6 fixed to the base end portion of the inner pipe 5 and the base end portion are attached to the base end member 6, and the inner pipe 5 is disposed inward with a gap S therebetween to cool the cooling hole 3. And an outer pipe 7 for discharging the fluid from the base end side to the outside through the gap S.

As shown in FIGS. 1 and 5, the base end member 6 has a first connecting portion 6a connected to a supply port 5a on the base end side outer peripheral surface to which a cooling fluid supply hose (not shown) can be connected. doing.
As shown in FIGS. 1 and 4, the outer pipe 7 has a second connection portion 7 a that can be connected to a cooling fluid discharge hose (not shown) on the proximal end side outer peripheral surface and communicated with the gap S. ing.
In addition, the 1st connection part 6a and the 2nd connection part 7a are formed with the internal thread for hose connection.

The base end member 6 is attached to the outer pipe 7 so as to be rotatable and detachable about the axial direction.
That is, the base end member 6 includes a male screw portion 6b provided on the outer periphery on the base end side, and an inner seal member 6c provided on the front end side from the male screw portion 6b on the outer periphery of the base end portion and capable of closely contacting the inner peripheral surface of the outer pipe 7. And have.
The outer pipe 7 includes an outer seal member 7e that is provided on the outer periphery of the tip portion and can be in close contact with the inner peripheral surface of the cooling hole 3, a female screw portion 7b that is provided on the inner peripheral surface and can be screwed into the male screw portion 6b, It has a space portion 7c that is provided on the peripheral surface and is adjacent to the tip end side in the axial direction of the female screw portion 7b and can accommodate the male screw portion 6b.

The tip of the inner pipe 5 is cut obliquely with respect to the axial direction, and the opening 5b opens in the oblique direction.
A base end portion 5 c of the inner pipe 5 is fixed to a pipe mounting hole 6 e formed in the base end member 6. That is, the base end portion 5c of the inner pipe 5 is machined with a male screw, and is screwed into and fixed to the portion of the base end member 6 with the female screw machined at the tip portion in the pipe mounting hole 6e. The first connecting portion 6a communicates with the pipe mounting hole 6e.

  The cooling hole 3 has a through hole portion 3a that penetrates the main mold 2B and has an inner diameter larger than the outer diameter of the outer pipe 7, and an inner pipe that is formed in the insert 2A and has an inner diameter smaller than that of the through hole portion 3a. 7 has an opening-side hole 3b into which the outer pipe 7 can be inserted, and a tip-side hole 3c whose inner diameter is set smaller than the outer diameter of the outer pipe 7 and whose inner diameter is set larger than the inner diameter of the outer pipe 7. ing. That is, the tip side hole 3c has an inner diameter smaller than that of the opening side hole 3b, and the inner pipe 5 can be inserted therein, and communicates with the gap S between the outer pipe 7 and the inner pipe 5. In addition, the through-hole part 3a, the opening side hole part 3b, and the front end side hole part 3c are formed coaxially.

The outer seal member 7e is an O-ring fitted in each of two annular grooves 7d formed on the outer periphery of the distal end portion of the outer pipe 7.
The inner seal member 6 c is an O-ring fitted in one annular groove 6 d formed on the outer periphery of the distal end portion of the base end member 6.

  In the mold cooling mechanism 1 of the present embodiment, a method for attaching and removing the cooling pipe 4 will be described below.

  When the cooling pipe 4 is inserted into the cooling hole 3 and attached, the outer pipe 7 is first pushed into the cooling hole 3 and attached. At this time, since the outer diameter of the outer pipe 7 is larger than that of the distal end side hole 3c, the outer pipe 7 is inserted up to the opening side hole 3b. At this time, the outer seal member 7e is in close contact with the inner peripheral surface of the opening-side hole 3b, whereby the outer pipe 7 is fixed to the cooling hole 3, and the cooling fluid from between the outer pipe 7 and the cooling hole 3 is used. Leakage is prevented.

Next, the inner pipe 5 to which the base end member 6 is fixed is inserted into the outer pipe 7, and the distal end side is inserted into the cooling hole 3. At this time, the male screw portion 6b is screwed into the female screw portion 7b from the outside, and the base end member 6 is turned into the space portion 7c formed on the distal end side of the male screw portion 6b to feed the male screw portion 6b. In this state, the male screw portion 6b fed into the space portion 7c is detached from the female screw portion 7b, but unless the base end member 6 is rotated in a screwable direction, the female screw portion 7b functions as a stopper. The movement toward the rear end side is restricted and positioned.
Moreover, since the front-end | tip of the outer side pipe 7 is contact | abutting to the step part of the boundary of the front end side hole part 3c and the opening side hole part 3b, the movement to the front end direction of the cooling pipe 4 is also controlled. Note that the base end of the base end member 6 may be supported by a pressing plate (back plate).

Further, in the state where the male screw portion 6b is arranged in the space portion 7c, only the base end member 6 can be rotated with respect to the outer pipe 7 without changing the position in the axial direction. It is possible to easily adjust the connection direction of each separately. That is, the take-out directions (connection directions) of the two cooling fluid hoses are not fixed to each other, and a high degree of freedom in the axial rotation direction is obtained.
In the above attachment method, the outer pipe 7, the inner pipe 5 and the base end member 6 are separated and attached to the mold 2. However, the outer pipe 7, the inner pipe 5 and the base end member 6 are assembled. Alternatively, the cooling pipe 4 may be attached by being inserted into the cooling hole 3 as it is from the tip side.

Next, when removing the inner pipe 5, the base end member 6 is rotated in the direction opposite to that at the time of attachment while pulling the base end member 6 in the rear end direction (the pulling direction), so that the male screw portion 6 b in the space portion 7 c. Is screwed into the female threaded portion 7b from the inner side (front end side), and further out beyond the female threaded portion 7b, the base end member 6 and the inner pipe 5 can be easily detached from the outer pipe 7 for easy maintenance. Become.
When the cooling pipe 4 is removed, the entire cooling pipe 4 can be removed simply by extracting the outer pipe 7 from the mold 2.

  Thus, in the cooling pipe 4 and the mold cooling mechanism 1 of the present embodiment, the base end member 6 is attached to the outer pipe 7 so as to be rotatable and detachable about the axial direction. By rotating 6 with respect to the outer pipe 7, the direction of the first connecting portion 6a can be freely changed with respect to the second connecting portion 7a of the outer pipe 7, and a discharge hose, a supply hose, The degree of freedom of handling can be improved.

  Further, when it is desired to remove the inner pipe 5 for maintenance or the like, the base end member 6 to which the supply hose is connected can be detached from the outer pipe 7, so that the outer pipe 7 and the discharge hose are attached to the mold 2. The inner pipe 5 can be removed together with the base end member 6.

  Furthermore, since the base end member 6 has a male screw portion 6b and an inner seal member 6c, and the outer pipe 7 has a female screw portion 7b and a space portion 7c, leakage is caused by the inner seal member 6c. In addition to being prevented, by disposing the male screw portion 6b in the space portion 7c beyond the female screw portion 7b, the inner pipe 5 and the base end member 6 can be prevented from coming off and positioned on the rear end side.

  In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

  DESCRIPTION OF SYMBOLS 1 ... Mold cooling mechanism, 2 ... Mold, 3 ... Cooling hole, 4 ... Cooling pipe, 5 ... Inner pipe, 5a ... Supply port, 5b ... Opening part, 6 ... Base end member, 6a ... 1st connection part, 6b ... male screw part, 6c ... inner seal member, 7 ... outer pipe, 7a ... second connection part, 7b ... female screw part, 7c ... space part, 7e ... outer seal member, S ... gap

Claims (3)

A cooling pipe that is inserted into a cooling hole formed in a mold and supplies a cooling fluid into the cooling hole,
An inner pipe that discharges the cooling fluid supplied to the inside from the supply port on the proximal end side into the cooling hole from the opening on the distal end side;
A proximal member fixed to the proximal end of the inner pipe;
A base end portion is attached to the base end member, and the inner pipe is arranged inside with a gap, and an outer pipe for discharging the cooling fluid in the cooling hole from the base end side to the outside through the gap; and
The base end member has a first connection portion that can be connected to the cooling fluid supply hose on the base end side outer peripheral surface and communicated with the supply port;
The outer pipe has a second connection portion that can be connected to the cooling fluid discharge hose on the outer peripheral surface on the base end side and communicated with the gap.
The cooling pipe, wherein the base end member is attached to the outer pipe so as to be rotatable and detachable in the axial direction. The cooling pipe according to claim 1,
The base end member has a male screw portion provided on the outer periphery on the base end side, and an inner seal member provided on the distal end side from the male screw portion on the outer periphery of the base end portion and capable of being in close contact with the inner peripheral surface of the outer pipe. ,
The outer pipe is provided on the outer periphery of the distal end portion and is provided on the inner peripheral surface of the outer seal member that can be in close contact with the inner peripheral surface of the cooling hole, the female screw portion that is provided on the inner peripheral surface and can be screwed into the male screw portion. And a space portion that is adjacent to the tip end side in the axial direction of the female screw portion and can accommodate the male screw portion. Cooling holes formed in the mold,
A cooling pipe inserted into the cooling hole and supplying a cooling fluid into the cooling hole,
The mold cooling mechanism, wherein the cooling pipe is the cooling pipe according to claim 1 or 2.

Images