JPH0110194Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to the cooling piping structure in a foam molding machine.It is easy to attach to the mold, provides a good cooling effect, and can change the shape of the mold. We are trying to provide something that is highly flexible.

<Prior art> Conventionally, the method of cooling a mold in a foam molding machine is to install cooling water supply piping in the steam chamber of the mold and inject cooling water from this cooling piping to the back of the mold. It will be done.

<Problem that the invention aims to solve> However, in order to properly cool the entire mold,
It is necessary to bend the cooling piping in a complicated manner to match the shape of the mold and to adjust the position of the injection holes, making the installation of the cooling piping extremely troublesome.

Furthermore, when the mold is replaced, the cooling piping must also be replaced and new piping must be re-wired to match the shape of the new mold, which is troublesome and inconvenient in terms of time and cost.

Therefore, we installed a frame-shaped cooling pipe in advance that communicates with the supply port of the base plate at the back of the mold and runs along the outer periphery of the steam chamber, and a number of easily bendable branch pipes are branched from this frame cooling pipe. A structure in which the branch pipe is bent and adjusted so that the injection hole formed in the branch pipe is placed at the desired position of the mold has also been proposed (see Utility Model Publication No. 16131/1983), but the above structure In this case, one cooling pipe is arranged in a frame shape along the entire circumference of the steam room, and there is only one cooling water supply port, so it is difficult to adjust the amount of water supplied to each branch pipe. There is a problem of local insufficient cooling or overcooling of the mold, making it difficult to balance or optimize the cooling effect.

Furthermore, since the cooling pipes were arranged around the entire circumference of the steam chamber, there were some areas that were susceptible to the effects of high heat during heating, and there was a risk of deformation, corrosion, etc.

Therefore, the object of this invention is to eliminate the drawbacks of the conventional structure described above, and to provide a cooling piping structure that is particularly easily adaptable to changes in mold shape and that can always provide a good cooling effect.

<Means for solving the problem> The configuration of the cooling piping structure in the foam molding machine of this invention to achieve the above object is a mold that can be opened and closed in the left and right directions, and in the steam chamber of the mold, A plurality of main cooling pipes are installed parallel to the back plate at appropriate intervals, and each main cooling pipe has its upper end communicated with the outside of the mold separately, and along the outer periphery of the steam chamber. Each main cooling pipe is connected to a plurality of bendable cooling branch pipes, and cooling water injection holes are formed at appropriate locations on the main cooling pipe and cooling branch pipes. The cooling branch pipes are further characterized in that they are arranged more densely in the upper part of the steam chamber than in the lower part.

<Function> According to the cooling piping structure of the foam molding machine of this invention configured as described above, the cooling branch pipe connected to the main cooling pipe can be bent or curved, and it can be applied to any part of the mold. Therefore, the cooling water can be injected in an optimal state, and the cooling state of the entire mold can be balanced.

Multiple main cooling pipes can be installed and the amount of cooling water can be adjusted for each main cooling pipe, so it can be adjusted depending on the parts of the mold that require strong cooling or those that do not require much cooling. The amount of water supplied to the main cooling pipe can be adjusted to optimize the degree of cooling.

Furthermore, when changing the shape of the mold, there is no need to reinstall the cooling pipes, and this can be handled by simply adjusting the water volume for each main cooling pipe.

Compared to installing a single frame-shaped cooling pipe around the entire outer circumference of the steam room, the length installation range of multiple main cooling pipes can be set appropriately, and the area of the steam room that is not affected by heat during heating can be set appropriately. Main cooling pipes can be left uninstalled in locations that are easily accessible or do not require cooling, reducing equipment costs and cooling water, as well as preventing damage to the main cooling pipes due to heat effects. .

Because the cooling branch pipes are arranged so that the upper part of the steam chamber is denser than the lower part, even if there is a water pressure difference between the upper and lower ends of the main cooling pipe, uniform cooling water is distributed within the steam chamber. The amount of water can be ensured, and the mold can be cooled well with cooling water in all of the upper, middle, and lower parts of the mold.

In addition, if the main cooling pipe breaks down or it becomes necessary to remove it due to the shape of the mold, you can simply remove the main cooling pipe in question and use the main cooling pipes in other parts as they are. can do.

<Example> Next, an example of this invention will be illustrated below with reference to the drawings.

In a normal foam molding machine that can be opened and closed from left to right, a cavity mold and a core mold are used in combination, and the cooling piping structure of this invention can be applied to both molds. However, for convenience, we will mainly explain the cavity type.

Reference numeral 1 denotes a mold, in this case a mold for a cavity mold. is closed by a back plate 3, and forms a space 4 on the back side of the mold 1, which becomes a steam chamber. The basic structure of these molds as a whole is the same as the conventional ones, and other molds are also formed with steam supply piping, drain ports, steam holes in mold 1, etc., but these parts are also the same as the conventional ones. The illustration is omitted since it may be any other material.

In this invention, cooling water supply ports 20 are provided at a plurality of locations (four locations in the figure) near the rear back plate 3 of the upper box frame 2. A cooling water supply pipe 5 that communicates with a distributor or the like is connected to the outside of the supply port 20 as appropriate, so that a necessary amount of cooling water can be supplied to each supply port 20.

Main cooling pipes 6 are connected to the inside of the mold of the supply port 20 at appropriate intervals parallel to the back plate 3, and these main cooling pipes 6 are connected to the inner circumference of the box frame 2, that is, the steam chamber 4. They are arranged from the upper side toward the lower side along the outer periphery of the . In the figure, two of the four main cooling pipes 6 are approximately L-shaped, and the remaining two
The book is approximately T-shaped and is shown arranged along the outer periphery of the steam chamber 4 from the upper side to the lower side.

Next, each main cooling pipe 6 has a main cooling pipe 6 at a plurality of locations.
A cooling branch pipe 7 having a smaller diameter is connected thereto.
This branch pipe 7 is made of copper pipe or other material that can be easily bent or curved and can be bent freely, and the length of the branch pipe 7 is from the main cooling pipe 6 on the outer periphery of the steam chamber 4 to the steam chamber 4. It is assumed that the length is long enough to reach the inner part of the steam chamber 4 on the center and mold 1 side.

The branch pipe 7 is connected to the lower part of the steam chamber 4 where cooling water is likely to come out due to the water pressure difference in the main cooling pipe 6.
They are arranged so that the upper part, where it is difficult for water to come out, is densely packed. Therefore, even if there is a water pressure difference between the upper and lower ends of the main cooling pipe 6, a uniform amount of cooling water can be ensured in the steam chamber, and the cooling water can be used in the upper, middle, and lower parts of the steam chamber. This allows uniform cooling of the mold.

At the tip of the branch pipe 7 or at an appropriate location along the main cooling pipe 6, small holes 70, 60 for spraying cooling water are formed through the tip, and it will be more effective if a spray nozzle is attached to the tip of the branch pipe 7. Yes, above pore 6
0 and 70 to the back surface of the mold 1 for cooling (see FIGS. 1 and 2).

Next, an example of the detailed structure of the connecting part between the main cooling pipe 6 and the external cooling water pipe 5 will be shown. First, a cylindrical socket 21 is attached to the outside of the supply port 20 of the box frame 2, and A female thread is cut in the external pipe 5, and a male threaded part 50 formed at the end of the external pipe 5 is screwed into one end of the socket 21 and fixed.

In addition, the main cooling pipe 6 has a male thread 61 cut at its end, and is inserted into the supply port 20 and screwed into the other end of the socket 21, and a flange portion 62 is provided near the end of the main cooling pipe 6. It is designed so that it can be attached and fixed to the inner edge of the supply port 20. 63 is an O-ring, which improves the sealing performance of the connection part. Note that the flange portion 62 has parallel notches in opposing portions of its outer periphery to facilitate screwing and rotation using a spanner or the like (see FIGS. 3 and 4).

Among the piping structures described above, the number and arrangement of the main cooling pipes 6 and branch pipes 7 are not limited to those in the above embodiments, and can be changed as appropriate depending on the entire mold or the shape of the mold. FIG. 5 shows an example of a piping structure for a core type to be combined with the cavity type of the above embodiment.

Although the main cooling pipe 6 may be attached to the back plate 3, it is more convenient and preferable to attach it to the side wall of the mold, that is, the box frame 2, since it is convenient to remove the back plate 3 and inspect the inside of the steam chamber 4. It is.

Furthermore, in the above embodiment, the main cooling pipe 6 divided into a plurality of pipes is arranged only in a part of the outer periphery of the steam chamber 4, but it is possible to arrange the main cooling pipe 6 over the entire outer periphery of the steam chamber 4. It may be.

<Effect of the invention> According to the cooling piping structure of the foam molding machine of this invention configured as described above, the mold 1 can be cooled by bending or curving the cooling branch pipe 7 connected to the main cooling pipe 6. Cooling water can be injected to any location in an optimal state, making it possible to improve and balance the cooling state of the entire mold.

Since a plurality of the main cooling pipes 6 can be installed and the amount of cooling water can be adjusted for each main cooling pipe 6, the parts of the mold 1 that need to be strongly cooled,
Alternatively, the degree of cooling can be optimized by freely adjusting the amount of water supplied to the corresponding main cooling pipe 6 depending on locations that do not require much cooling. Furthermore, even when changing the shape of the mold, there is no need to reinstall the cooling pipes, and this can be easily handled by simply adjusting the amount of water for each of the main cooling pipes 6, providing great flexibility.

Moreover, compared to the case where a single frame-shaped cooling pipe is installed around the entire outer periphery of the steam chamber 4, by appropriately setting the length installation range of the plurality of divided main cooling pipes 6, the steam chamber 4 can be The main cooling pipe 6 can be omitted in areas that are easily affected by heat during heating or areas that do not require cooling, which reduces equipment costs and saves cooling water. This is also suitable for preventing damage to the main cooling pipe 6 due to thermal effects.

Furthermore, since the main cooling pipes 7 are arranged so that the upper part of the steam chamber 4 is denser than the lower part, even if there is a water pressure difference between the upper end and the lower end of the main cooling pipe 6, there is no problem in the steam chamber. A uniform amount of cooling water can be ensured, and the mold can be cooled well by the cooling water in any of the upper, middle, and lower parts of the mold.

In addition, if the main cooling pipe 6 breaks down or it becomes necessary to remove the main cooling pipe 6 due to the shape of the mold, you can remove only the main cooling pipe 6 in question, and the main cooling pipes 6 in other parts can be removed. It is also possible to use the system as is, making it much easier and convenient to handle than the conventional structure in which the entire cooling piping is replaced.

As described above, this invention can greatly contribute to improving the cooling performance of molds, provide a cooling piping structure that is highly flexible and easy to handle when changing molds, and is extremely inexpensive for practical use.

[Brief explanation of the drawing]

The figure illustrates an embodiment of this invention,
1 is a sectional view, FIG. 2 is a front view, FIG. 3 is an enlarged sectional view of a connecting portion, FIG. 4 is a bottom view, and FIG. 5 is a front view of a modified example. 1... Mold, 2... Box frame, 3...
Rear plate, 4... Steam room, 5... External cooling water piping,
6... Main cooling pipe, 7... Cooling branch pipe, 60, 70...
...Injection hole.

Claims (1)

[Claims for Utility Model Registration] 1. A mold that can be opened and closed in the left and right directions, in which main cooling pipes divided into a plurality of pipes are installed parallel to the back plate at appropriate intervals in the steam chamber of the mold. The main cooling pipes have their upper ends communicated with the outside of the mold separately, and are arranged from the upper side to the lower side along the outer periphery of the steam chamber, and each main cooling pipe has a plurality of pipes. Flexible cooling branch pipes are connected, and cooling water injection holes are formed at appropriate locations on the main cooling pipe and cooling branch pipes, and the cooling branch pipes are denser in the upper part than in the lower part of the steam chamber. A cooling piping structure for a foam molding machine, characterized in that the cooling piping structure is arranged so as to 2. A cooling piping structure in a foam molding machine according to claim 1, wherein the upper end of the main cooling pipe is communicated with the outside through the side wall of the mold.