JP4212889B2 - Mold cooling pipe and mold with cooling structure using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold cooling pipe for mounting in a cooling hole of a mold used for die casting, injection molding or the like and cooling the mold, and a mold cooling structure using the same, An inner pipe is arranged in the outer pipe to form an outward path and a return path for cooling water, and a hose provided with an inlet connection port leading to the outbound path and an outlet connection port leading to the return path on one end side of the outer pipe and the inner pipe. The present invention relates to a mold cooling pipe configured by attaching a connection base, and a mold cooling structure using the cooling pipe.
[0002]
[Prior art]
When a mold is cooled using this type of cooling pipe, it is desirable to cool by forming a cooling hole at an appropriate position of the mold according to the shape of the product to be cast. However, the mold cooling hole for mounting this type of cooling pipe is drilled from the back side of the mold toward the cavity side so that at least the outer pipe of the cooling pipe can be inserted (inner diameter). Depending on the location where the cooling holes are drilled, the proper number of cooling holes cannot be drilled at an appropriate position for reasons such as insufficient strength of the mold. As a result, accurate cooling cannot be performed. (See Patent Document 1).
[0003]
[Disclosure of prior art documents]
[Patent Document 1]
Japanese Utility Model Publication No. 6-14926
[Problems to be solved by the invention]
The present invention has been made in view of such a conventional problem, and it is possible to perform accurate cooling by drilling a cooling hole in a desired portion of a mold according to the shape of a cast product. It is an object of the present invention to provide a mold cooling pipe and a mold cooling structure using the same, in which a small number of cooling pipes can be used with respect to a large number of formed mold cooling holes.
[0005]
[Means for Solving the Problems]
The mold cooling pipe of the present invention that achieves such an object includes a plurality of inner pipe branch branches from the tip of one inner pipe main pipe, and the inner pipe main pipe is arranged in the outer pipe. The inner pipe main pipe is protruded from the front end of the outer pipe, and the inner pipe main pipe and the inner pipe branch pipe form a forward path for cooling water, and the outer pipe and the inner pipe main pipe. A cooling water return path is formed between the outer pipe and the inner pipe main pipe, and a hose connection cap having a water inlet connection port leading to the forward path and a water outlet connection port leading to the return path is attached to the base end side of the outer pipe and the inner pipe main pipe. It is characterized by being comprised (Claim 1).
At this time, it is preferable that the inner pipe branch of the inner pipe is formed of an elastic pipe.
The mold with a cooling structure according to the present invention is a mold with a cooling structure in which the above-described cooling pipe for a mold is installed in a drilled cooling hole, and a plurality of the cooling holes are provided in the inner part thereof. Each of the branched inner pipe branch pipes is inserted and arranged separately inside the cooling hole, and the outer pipe is inserted and installed in a watertight manner with respect to the cooling hole. (Claim 3).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings showing an embodiment thereof.
A symbol A in the figure indicates a mold cooling pipe, and a symbol B indicates a mold.
[0007]
The mold cooling pipe A according to the present invention basically has a water inlet connection port leading to the cooling water forward path 3 on the proximal end side of the outer pipe 1 and the inner pipe 2 arranged concentrically as in the prior art. 4 and a hose connection base 7 having a water discharge connection port 6 leading to the cooling water return path 5 are integrally attached, and are detachably inserted into the cooling hole 8 formed in the mold B.
The cooling pipe A is disposed on the back side of the mold B so that it does not accidentally come out of the cooling hole 8 due to the supply pressure of the cooling water during use after being inserted into the cooling hole 8. The presser plate C or the like is contacted and fixed.
[0008]
In the mold cooling pipe A according to the present invention, the inner pipe 2 is composed of one inner pipe main pipe 21 and a plurality of inner pipe branch pipes 22a, 22b, 22c with respect to one outer pipe 1. A plurality of inner pipe branch pipes 22a, 22b, and 22c are branched from the distal end portion of one inner pipe main pipe 21.
In this type of mold cooling pipe A, the inner pipe 2 is usually formed longer than the outer pipe 1, the inside of the inner pipe 2 is used as a cooling water forward path 3, and the space between the outer pipe 1 and the inner pipe 2 is cooled. The water return path 5 is configured.
[0009]
The inner pipe branch pipes 22a, 22b, and 22c are made of thin pipe materials having elasticity such as metal pipes such as copper, aluminum, and stainless steel, and synthetic resin pipes. , 8b, 8c are formed in lengths corresponding to the depths of the inner pipe main pipe 21, and are integrally fixed to the inside of the inner pipe main pipe 21 by brazing or welding. Connected.
[0010]
The mold cooling hole 8 is formed in a more appropriate position according to the shape of the product to be cast from the back side of the mold B toward the cavity. At this time, the cooling hole 8 is formed by branching into a plurality of 8a, 8b, and 8c inside. That is, a single cooling hole 8 facing the cavity is formed on the back side of the mold B, and a plurality of cooling holes 8a, 8b, 8c are formed according to the shape of the product cast in the inner and inner parts near the cavity. It is formed by branching.
[0011]
Therefore, as the mold B to which the mold cooling pipe A according to the present invention is applied, a mold in which the nested mold B2 is nested with respect to the main mold B1, or a piece as shown in the illustrated embodiment. It is desirable to use B3. By using such a mold, a hole 8 'having a size (inner diameter) enough to allow the outer pipe 1 of the cooling pipe A to be inserted through the back side of the mold B, that is, the main mold B1. The cooling hole 8 communicates with the cooling hole 8 drilled in the main mold B1 at an appropriate position in accordance with the shape of the product to be cast on the inner side of the cooling hole 8, that is, on the back side of the insert mold B2 or the insertion frame B3. Thus, it becomes possible to easily form a plurality of inner and outer cooling holes 8a, 8b, 8c.
[0012]
Thus, when the mold cooling pipe A is mounted in the cooling hole 8 of the mold B, the inner pipe branch pipes 22a, 22b, 22c of the inner pipe 2 are previously connected to the inside of the cooling hole 8 of the mold B. The cooling pipes 8a, 8b, 8c drilled in the back are bent so as to conform to the shape of the cooling holes. On the other hand, a male screw is engraved on the outer periphery of the outer pipe 1 or a ring shape. Packing 9 is attached.
Next, when the inner pipe branch pipes 22a, 22b, and 22c of the inner pipe 2 are expanded to the periphery rather than the outer diameter of the outer pipe 1, the inner pipe of the inner pipe 2 is inserted into the cooling hole 8 of the mold B. The branch pipes 22a, 22b, and 22c are bundled by hand or the like, and the inner pipe branch pipes 22a, 22b, and 22c of the inner pipe 2 are inserted into the cooling hole 8 in this state. Then, the inner pipe branch pipes 22a, 22b, 22c of the inner pipe 2 are restored to the original state in the inner part of the cooling hole 8, and are separately inserted and arranged in the inner cooling holes 8a, 8b, 8c, respectively. A male screw engraved on the outer periphery of the distal end of the outer pipe 1 is screwed into the inner periphery of the cooling hole 8 in a watertight manner, or watertight with respect to the cooling hole 8 via a ring-shaped packing 9 as in the illustrated embodiment. Insert it into the shape. Therefore, it is preferable that the inner pipe branch pipes 22a, 22b, and 22c of the inner pipe 2 have not only elasticity but also rigidity that can hold a bent shape.
Finally, the hose 17 is connected to each of the water inlet port 4 and the water outlet port 6.
Thus, the cooling water supplied from the inlet connection port 4 of the hose connection base 7 passes from the inside of the cooling water forward path 3, that is, the inner pipe (inner pipe main pipe 21) to the inner pipe branch pipes 22a, 22b, 22c. Each of the cooling holes 8a, 8b, 8c inside the mold cooling hole 8 is supplied separately, and heat is exchanged there to take the heat of the mold. And the cooling water heat-exchanged in each cooling hole 8a, 8b, 8c passes the cooling water return path 5 formed between the outer pipe 1 and the inner pipe (inner pipe main pipe 21), and a hose connection cap 7 Is discharged to the outside through the water outlet 6.
[0013]
【The invention's effect】
In the present invention, in the mold cooling pipe composed of the outer pipe and the inner pipe, the inner pipe is formed by branching a plurality of inner pipe branches from one inner pipe main pipe, and each of these inner pipe branch pipes. Are inserted and arranged separately in a cooling hole formed by branching into a plurality of cooling holes in the inner part of the cooling hole, so that the cooling hole is provided at a desired location of the mold according to the shape of the product to be cast. It is possible to perform accurate cooling by drilling, and at the same time, it is possible to cool a plurality of locations of the mold with a single mold cooling pipe. Therefore, the number of cooling pipes used is small with respect to a large number of (inner depth) mold cooling holes, and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of the embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view showing a state where it is mounted on the same piece.
[Explanation of symbols]
A: Mold cooling pipe B: Mold C: Presser plate 1: Outer pipe 2: Inner pipe 21: Inner pipe main pipe
22a, 22b, 22c: Inner pipe branch pipe 3: Cooling water outbound path 4: Cooling water connection port 5: Cooling water return path 6: Outlet connection port 7: Hose connection port 8: Cooling holes 8a, 8b, 8c: Cooling holes in the inner part

Claims (3)

Branch multiple inner pipe branch pipes from the tip of one inner pipe main pipe,
The inner pipe main pipe is arranged in the outer pipe, and the tip of the inner pipe main pipe is formed so as to protrude from the tip of the outer pipe,
Forming a cooling water forward path by the inner pipe main pipe and the inner pipe branch pipe and forming a cooling water return path between the outer pipe and the inner pipe main pipe,
A mold cooling system comprising a hose connection base having a water inlet connection port leading to the forward path and a water outlet connection port leading to the return path on a proximal end side of the outer pipe and the inner pipe main pipe. pipe.   The mold cooling pipe according to claim 1, wherein the inner pipe branch pipe is formed of an elastic pipe. A mold with a cooling structure for installing the cooling pipe for a mold according to claim 1 or 2 in a drilled cooling hole,
The cooling hole is formed by branching into a plurality of inner depths, and each of the branched inner pipe branch pipes is inserted and arranged separately in the inner depth of the cooling hole, and the outer pipe is connected to the cooling hole. A mold with a cooling structure, which is inserted in a watertight manner .

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