JPH034428Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a reciprocating mold for circulating and supplying cooling water to the inside of the mold in order to cool the mold used in die casting, plastic molding, etc. This relates to cooling pipes for molds.

A reciprocating cooling pipe is a cooling pipe that has an outgoing path for cooling water, and the cooling water enters the inside of the mold through that outgoing path, and the cooling water that has been heat exchanged inside the mold is transferred to the cooling water. Refers to something that is discharged to the outside of the mold through the return path.

<Prior Art> In order to eliminate the drawbacks of the double pipe structure, the present applicant previously developed a method in which the inside of a single hollow pipe is partitioned in the axial direction with a single partition plate to form an outward path and a return path for cooling water. We proposed a cooling pipe that could be used as a cooling pipe.
(See No. 54155).

Due to its structure, this cooling pipe was able to solve the inconveniences of the double pipe structure, such as water leakage and rising material costs, but like the double pipe structure, the outer diameter of the hollow pipe was This is an installation structure in which the pipe is formed to have the same diameter as the diameter (hole diameter) of the pipe, and a packing retaining concave groove is provided on the outside of the pipe, and the waterproof packing is attached to the groove and inserted into the cooling hole in a fitting manner. Therefore, several types of cooling pipes must be manufactured and prepared depending on the diameter of the cooling hole. Also, in order to ensure that the cooling water discharged from the outward path reaches the depths of the cooling hole (the bottom of the hole), it is possible to cut out the hollow pipe to change the amount of protrusion of the partition plate from the hollow pipe depending on the depth of the cooling hole. This requires complicated processing.

In other words, the diameter and depth of the cooling holes in the mold vary depending on the shape and wall thickness of the product in the mold cavity, so when adopting the conventional installation structure described above, A hollow pipe with a diameter of Several types of cooling pipes had to be manufactured depending on the diameter and depth of the cooling hole, which required cutting out the hollow pipe to allow the partition plate to protrude from the hollow pipe so that it could reach deep into the pipe.

<Problems to be solved by the invention> The present invention was made in view of such conventional problems, and the technical problem to be solved is to create a partition plate inside a hollow pipe that partitions it in the axial direction. In cooling pipes that are integrally installed to form the outward and return paths of cooling water, all cooling holes can be made to have different diameters by a simple process such as cutting a hollow pipe to match the depth of the cooling hole. In addition, by freely inserting the hollow pipe into the cooling hole, a sufficient heat exchange area can be secured, and the mold can be effectively cooled with good circulation. There is a particular thing.

<Means for solving the technical problems> The technical means taken by the present invention to achieve the above object is to form the outer diameter of the hollow pipe to be smaller than the diameter of the mold cooling hole, and to The water-stop packing can be fixed at a suitable position in the axial direction, and a cooling water return port is provided near the fixing position of the water-stop packing to communicate the return path and the cooling hole.

<Embodiment> Hereinafter, an example of the embodiment of the present invention will be described based on the drawings.

In the figure, A is a cooling pipe, B is a mold, and C is a cooling hole into which the cooling pipe A is inserted and installed to cool the mold B.

The cooling pipe A is formed by partitioning the inside of a hollow pipe 1 in the axial direction (longitudinal direction) with a single partition plate 2 to form an outgoing path 3a and a returning path 3b of cooling water, and has a hose connection fitting 4 at one end thereof. Attachment: A water supply port pipe 5 and a drain port pipe 6 that communicate with the outward path 3a and return path 3b of the cooling water are integrally attached to the hose connection cap 4.

The hollow pipe 1 and the cooling water 2 are formed by extrusion molding using steel, iron, aluminum, an alloy thereof, or a synthetic resin material, and a partition plate 2 is installed inside the hollow pipe 1 over the entire length in the axial direction. are provided integrally, and the thickness (diameter) of the hollow pipe 1 is smaller than the diameter of the cooling hole C, which has the smallest diameter among the many cooling holes C formed in the mold B. The thickness is such that when the hollow pipe 1 is inserted into the cooling hole C, a distance _M2 as shown in the figure is secured between the inner peripheral surface of the cooling hole C and the outer surface of the hollow pipe 1. Yes, hollow pipe 1 based on such requirements
This is to set the thickness of.

Then, the hollow pipe 1 having an outgoing path 3a and an incoming path 3b of cooling water was inserted into the inside of the pipe, which was formed into an appropriate length by extrusion molding, and cut into a predetermined length according to the depth of the cooling hole C. Later, the hose connection cap 4 is attached to one end, and the water stop packing 8 is fixed to the outside, and the cooling water return path 3b and the cooling hole C of the mold B are installed near the stop position of the water stop packing 8. A cooling water return port 7 is provided to communicate with the cooling water return port 7.

The waterproof packing 8 has a thickness, that is, an inner diameter, which is approximately the same as the outer diameter of the hollow pipe 1, so that it can be fixed to the outside of the hollow pipe 1 at a desired position in the axial direction with a desired frictional force. The outer diameter and the thickness of the cooling holes C are formed so as to closely fit the inner circumferential surfaces of the cooling holes C having different diameters.

The cooling water return port 7 is inserted when the hollow pipe 1 is inserted into the cooling hole C with a sufficient insertion amount so that the cooling water discharged from the cooling water outgoing path 3a reaches the depth of the cooling hole C (bottom of the hole). Return path 3b entrance 3' on the other end side
From b to the stop position of the water stop packing 8
In the gap _M2 secured in the relevant part in _M1 , cooling water or gas generated by water coming into contact with a high-temperature part flows to the return path 3b without stagnation and passes through the return path 3b to the mold B. A hole is opened near the water stop packing 7 of the hollow pipe 1 so that the water can be discharged to the outside.

According to the present embodiment configured as described above, the interior, which is integrally molded to an appropriate length by extrusion molding, is partitioned in the axial direction by the partition plate 2, and the outgoing path 3a and the incoming path 3b of the cooling water are separated. A hollow pipe 1 having a hose connection cap 4 attached to one end thereof is cut off at the other end to a length matching the depth of the cooling hole C.
Then, the water stop packing 7, which has been formed in advance to match the diameter of the cooling hole C, is fixedly attached to the outside of the hollow pipe 1 according to the insertion amount of the hollow pipe 1, and a simple The cooling pipe A can be manufactured by drilling the cooling water return port 17 by drilling.

Therefore, the cooling water discharged from the outward path 3a flows through the cooling hole C.
Although the installation structure is such that the hollow pipe 1 is freely inserted with an insertion amount that reaches the depth of the mold B, the cooling pipe A is installed from the insertion hole D on the back side of the mold B.
A sufficient heat exchange area with the cooling hole C can be secured with a distance of _M2 , and the cooling water discharged from the outward path 3a reaches the depths of the cooling hole C for heat exchange, and the heat exchanged cooling water is transferred to the return path. The mold B can be effectively cooled by reciprocating circulation under good circulation in which the water is discharged from the inlet 3'b of the cooling water return port 3b and the cooling water return port 7 to the outside of the mold B through the return path 3b. .

<Effects of the invention> Since the cooling pipe of the invention is constructed as described above, it exhibits the following effects.

The thickness (outer diameter) of the hollow pipe, which is integrally equipped with a partition plate that partitions the inside in the axial direction, is made smaller than the diameter of the mold cooling hole, and the water-stop packing is fixed on the outside in the appropriate position in the axial direction. The hollow pipe can be inserted freely into the cooling hole, and the amount of insertion of the hollow pipe into the cooling hole can be adjusted freely depending on the depth of the cooling hole.
By cutting the length of the hollow pipe to match the depth of the cooling hole and attaching waterproof packing formed to match the diameter of the cooling hole to the outside of the hollow pipe, all pipes with different diameters can be created. It can be used by inserting it into the cooling water hole.

Moreover, even if the cooling pipe is installed by inserting a hollow pipe into the cooling hole with an insertion amount that allows the cooling water to reach the depths of the cooling hole (the bottom of the hole), the amount of water that can be inserted from the stopping position of the water stop packing to the entrance of the return path is small. Since the gap _M2 is secured in the relevant part at the gap _M1 , a sufficient area can be secured without reducing the heat exchange area between the cooling water and the cooling hole by the hollow pipe, and the cooling water discharged from the outward path can be The water reaches the depths of the cooling hole and exchanges heat, flows to the return path from the cooling water return port provided near the stopping position of the water stop packing, and is discharged from the return path to the mold without accumulating in the cooling hole. The mold can be effectively cooled with good reciprocating circulation.

Therefore, according to the cooling pipe of the present invention, it is possible to cut the pipe according to the depth of the cooling hole and cut the hole according to the amount of insertion into the cooling hole without any need for the troublesome and time-consuming notching process as in the conventional method. It can be manufactured by simple machining such as drilling, and can be inserted and installed in all cooling holes with different diameters, and the mold can be effectively cooled under good circulation.

Thus, the intended purpose can be achieved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the implementation of the present invention, showing a state where it is assembled into a mold, and FIG. 2 is a sectional view taken along line 2-2 in FIG. In the figure, A is a cooling pipe, B is a mold, C is a cooling hole, 1 is a hollow pipe, 2 is a partition plate, 3a is a cooling water outgoing path, 3b is a cooling water return path, 7 is a cooling water return port, 8 is a waterproof packing.

Claims (1)

[Scope of utility model registration request] In a cooling pipe in which a partition plate that divides the cooling water in the axial direction is integrally provided inside the hollow pipe to form an outgoing path and a returning path for cooling water, the outer diameter of the hollow pipe is made smaller than the diameter of the mold cooling hole. At the same time, on the outside thereof, a water stop packing can be fixed at a suitable position in the axial direction, and a cooling water return port is provided near the fixed position of the water stop packing to communicate the return path and the cooling hole. Characteristic cooling pipe for molds.