JP4281366B2 - Cooling medium / release agent spraying device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling medium / release agent spraying apparatus, and more particularly to an apparatus for spraying a cooling medium or a release agent onto a cavity surface of a mold.
[0002]
[Prior art]
In die-casting machines and other molding machines, each time the mold is opened, a cooling medium is sprayed onto the mold cavity surface to improve the mold cavity temperature in order to improve the mold separation from the mold. After being lowered, the mold release agent is sprayed on the surface of the mold cavity. That is, a cooling medium is first sprayed from the spraying device, and then a release agent is sprayed into the mold cavity (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent No. 3003824 (pages 1 to 3, FIGS. 1 to 4)
[0004]
[Problems to be solved by the invention]
However, this patent document 1 only discloses the spray device functionally, and does not disclose its specific configuration. Presumably, the spraying device seems to have both the cooling medium spraying means and the release agent spraying means. If so, a blower, which is a source of compressed air essential for spraying, is provided in each spraying means, and the configuration of the spraying device, particularly the on-off valve of the air becomes complicated.
[0005]
Therefore, an object of the present invention is to provide a cooling medium / release agent spraying device that can be simplified in configuration.
[0006]
[Means for Solving the Problems]
A nozzle having a discharge port directed to the cavity surface of the mold, a release agent tank for storing a release agent sprayed on the mold, a blower for sending compressed air sprayed to the mold to the nozzle, and a mold A cooling water tank for storing the cooling water to be sprayed on, a manifold having a nozzle disposed on one side and having a flow path communicating with the nozzle inside, a mixing means for mixing the cooling water and the compressed air, and the manifold and the mold release Between the release agent pipe connecting the agent tank, the compressed air pipe connecting the manifold and the blower, the cooling water pipe connecting the cooling water tank and the compressed air distribution pipe, and the release agent tank and the manifold. A first opening / closing valve that opens and closes the release agent pipe, a second opening / closing means that is disposed between the blower and the mixing means, and that opens and closes the compressed air pipe, and between the cooling water tank and the mixing means. The cooling water pipe is opened And a third switching means for performing,
The cooling water pipe is connected by a mixing means disposed in the compressed air pipe, and the compressed air pipe is a cooling water / release agent spraying device that merges with the release agent pipe in the nozzle.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the cooling medium / release agent spraying apparatus according to the present invention will be specifically described.
[0008]
The cooling medium / release agent spraying apparatus 10 includes a nozzle 12. The nozzle 12 has two discharge ports 12 </ b> A and 12 </ b> B held by the manifold 14. The discharge ports 12A and 12B are directed to the cavity surface 82 of the mold 80.
[0009]
The tank 20 in which the release agent is accommodated is connected to one end 22 </ b> X of the pipe 22. The other end of the pipe 22 has a bifurcated shape, and includes a first end 22A connected to the discharge port 12A and a second end 22B connected to the discharge port 12B. A pump 24 and a first on-off valve 26 are interposed in the pipe 22. The pump 24 and the first on-off valve 26 are under the control of a control device 90 whose main component is a microcomputer (not shown).
[0010]
The discharge port of the blower 30 that is an air source is connected to one end portion 32 </ b> X of the pipe 32. The other end of the pipe 32 has a bifurcated shape, and includes a first end 32A connected to the discharge port 12A and a second end 32B connected to the discharge port 12B. A second open / close valve 36 is interposed in the pipe 32. The blower 30 and the second on-off valve 26 are under the control of the control device 90.
[0011]
A mixing block 38 is formed in the pipe 32 downstream of the second on-off valve 36. This block 38 is connected to a check valve 48. This check valve 48 is connected via a pipe 42 to a tank 40 in which cooling water is accommodated. A pump 42 and a third opening / closing valve 46 are interposed between the check valve 48 and the tank 40. The pump 42 and the third on-off valve 46 are under the control of the control device 90.
[0012]
The above-described cooling medium / release agent spraying device 10 operates as follows by the control device 90.
[0013]
When the cooling medium / release agent spraying device 10 is not activated (when a main switch (not shown) is off), the first on-off valve 26, the second on-off valve 36, and the third on-off valve 46 are closed.
[0014]
When the main switch is turned on and the cooling medium / release agent spraying device 10 is activated, the control device 90 opens the second on-off valve 36 and the third on-off valve 46. Then, air discharged from the blower 30, that is, compressed air, passes through the pipe 32 and is pumped to the discharge ports 12 </ b> A and 12 </ b> B of the nozzle 12. At the same time, the cooling water in the tank 40 compressed by the pump 42 passes through the pipe 42, reaches the mixing block 38 of the pipe 32, and is mixed with the compressed air passing through the pipe 32. As a result, the cooling water is atomized, and the cooling water is sprayed toward the cavity surface 82 of the mold 80 from the discharge ports 12 </ b> A and 12 </ b> B of the nozzle 12. The mold 80 is cooled by continuously spraying the cooling water for a predetermined time.
[0015]
During such a mold cooling process, the check valve 48 prevents the compressed air from flowing into the pipe 42.
[0016]
Next, the control device 90 closes the third on-off valve 46 and opens the first on-off valve 26. Then, the release agent in the tank 20 compressed by the pump 24 passes through the pipe 22 and reaches the discharge ports 12A and 12B of the nozzle 12, but compressed air is discharged from the discharge ports 12A and 12B of the nozzle 12. Therefore, as a result, the release agent is sprayed from the discharge ports 12 </ b> A and 12 </ b> B of the nozzle 12 toward the cavity surface 82 of the mold 80. The release agent application process is carried out by continuously spraying the release agent for a predetermined time.
[0017]
Briefly describing the above operation, the switching means composed of the control device 90, the first on-off valve 26, the second on-off valve 36, and the third on-off valve 46 is an alternative to cooling water and mold release agent with compressed air. As a result, the cooling water and the release agent are sprayed back and forth on the cavity surface 82, respectively.
[0018]
Note that the pumps 24 and 42 and the blower 30 are not necessarily placed under the control of the control device 90, and may be driven individually as appropriate.
[0019]
【The invention's effect】
According to the present invention, spraying of the cooling medium and spraying of the release agent can be performed by a blower that is a common air source, so that the apparatus can be simplified and has a great practical effect.
[Brief description of the drawings]
Block die Ya grams of an example embodiment of such a cooling medium, the release agent spray device in the invention; FIG.
[Explanation of symbols]
12 nozzles
14 Manifold
20 tanks (release agent tank)
22 Piping (release agent piping)
26 First open / close valve (first open / close means)
30 Blower
32 Piping (Compressed air piping)
36 Second on-off valve (second on-off means)
38 Mixing block (mixing means)
40 tanks (cooling water tank)
42 Piping (cooling water piping)
46 3rd on-off valve (3rd on-off means)
80 Mold 82 Cavity 90 Controller

Claims (1)

A nozzle in which a discharge port directed to the cavity surface of the mold is formed;
A release agent tank for containing a release agent sprayed on the mold;
A blower for sending compressed air sprayed onto the mold to the nozzle;
A cooling water tank containing cooling water sprayed on the mold;
A manifold having the nozzle disposed on one side and having a flow path communicating with the nozzle inside;
Mixing means for mixing the cooling water and the compressed air;
A release agent pipe connecting the manifold and the release agent tank;
Compressed air piping connecting the manifold and the blower;
A cooling water pipe connecting the cooling water tank and the compressed air distribution pipe;
A first on-off valve disposed between the release agent tank and the manifold for opening and closing the release agent pipe;
A second opening / closing means disposed between the blower and the mixing means for opening / closing the compressed air pipe;
A third opening / closing means disposed between the cooling water tank and the mixing means for opening / closing the cooling water pipe;
The cooling water pipe is connected by the mixing means arranged in the compressed air pipe,
The cooling water / release agent spraying apparatus characterized in that the compressed air pipe merges with the release agent pipe in the nozzle.

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