JPH0539812Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a multi-liquid coating device, and is particularly applicable to die casting molds and synthetic resin molding molds, such as mold release agents, cooling water, cleaning water, etc. The present invention relates to a device for coating.

[Conventional technology]

When molding castings or synthetic resins using molds,
In order to facilitate the removal of a product from an opened mold and improve production efficiency, it has been conventional practice to apply a mold release agent to the mold.

In Japanese Utility Model Application No. 60-136764, a spray head for spraying a mold release agent between an opened fixed mold and a movable mold is provided so as to be movable forward and backward using a link mechanism, and the spray head can be moved forward and backward using a link mechanism, and the spray head can be moved forward and backward using a link mechanism. A method in which a mold release agent is applied has been proposed.

In addition, Japanese Utility Model Application Publication No. 57-51657 describes a spray device that sucks up liquid with air and sprays it.
It has been proposed to include a plurality of chemical liquid tanks, which face a spray nozzle via a switching valve, and to spray two liquids by switching the switching valve at predetermined time intervals.

[Problem that the invention attempts to solve]

When molding castings or synthetic resins using molds,
In order to make it easier to remove the product from the opened mold and improve production efficiency, a mold release agent is applied to the mold. It is necessary to apply a molding agent, and even if the temperature of the mold increases, a mold release agent is often applied without taking time to cool the mold. However, due to the nature of the mold release agent, when it is used at a high temperature above a predetermined temperature, the mold release effect decreases.

In particular, in the case of die casting, a mold release agent is often sprayed to cool the mold immediately after opening the mold and taking out the product. In this case, the mold temperature is about 400°C.

When a highly concentrated mold release agent is sprayed onto a hot mold, the mold release agent evaporates the moment it touches the mold, and the components of the mold release agent adhere to the mold and its surroundings, causing severe seizure. This makes it difficult for the product to come out and causes the product to squeak.

For this reason, molds are cleaned by hand spray at the start of work, but this reduces productivity.

Application of mold release agent involves applying a small amount of mold release agent to areas of the mold that are difficult to remove or areas that are prone to seizure, but cooling water and cleaning agents are used to It is necessary to spray a large amount over a wide area.

In the method described in the above-mentioned publication, only a mold release agent is applied, and spraying of a cleaning agent or cooling water must be performed separately.

In addition, in the latter case, since the position of the spray nozzle is fixed and a common spray nozzle is used, the spray state of the two liquids is also the same, and each liquid can be used in different spray conditions on different parts. I can't.

The present invention solves the above problems by applying a predetermined amount of mold release agent to a predetermined part of the mold, and spraying a large amount of cleaning agent or cooling water onto the mold at a predetermined timing. The object of the present invention is to provide a multi-liquid coating device that can perform the following steps.

[Means and actions for solving problems]

In the present invention, a shaft body having an outer pipe arranged thereon so as to form an outer passage around an inner pipe forming an inner passage is installed to move forward and backward, a nozzle is fixed to one end of the shaft body, and a nozzle is fixed to one end of the shaft body. The nozzle is provided with a central blow-off hole that communicates with the inner passage and a number of peripheral blow-off holes that communicate with the outer passage, and a plurality of liquid coating devices are provided in which a different liquid feeding means is connected to each of the passages of the shaft body. be.

The shaft body with the nozzle at the tip is movable back and forth, so when not in use, it is moved away from the application position, and during application, the nozzle is moved forward to bring its blow-out hole closer to the application area, and the predetermined amount is applied. It can be applied to the area efficiently.

Since a liquid feeding means connected to the inner passage and a liquid feeding means connected to the outer passage are provided, it is possible to apply the desired amount of the desired liquid to the desired area only from the central blowout hole, and Separately, another liquid can be blown out from a number of peripheral blow-off holes and applied to a different area from the above-mentioned liquid.

〔Example〕

An embodiment of the present invention shown in the drawings will be described.

As shown in FIG. 1, a nozzle 7 is provided at the tip of a shaft body that moves forward and backward by an operating cylinder 2 fixed to a mold 1 with a bracket 3. Pipe 6 is arranged,
The inside of the inner cylinder pipe 6 is an inner passage 8 and an inner cylinder pipe 6.
An outer passage 9 is formed between the outer cylinder pipe 4 and the outer cylinder pipe 4.

The nozzle 7 is advanced into the mold by the actuating cylinder 2 after opening the movable mold and taking out the product. In this advance/retreat mechanism, a piston 5 fixed to an outer cylindrical pipe 4 is disposed within an operating cylinder 2, and is driven by fluid flowing into the operating cylinder 2 from hoses connected to nipples 12 and 13.

A pipe 20 communicating with the inner passage 8 is connected to the rear end of the shaft, and the release agent is supplied from the mold release agent tank 24 to the inner passage 8 via a filter 23, a pump 22, and a control valve 21. Ru. Further, a pipe 30 communicating with the outer passage 9 is connected to the rear end of the shaft, and the cleaner is supplied from the cleaner tank 34 to the outer passage 9 via the filter 33, the pump 32, and the control valve 31.

The nozzle 7, as shown in an enlarged cross section in FIG.
It is fixed with a snap ring via an O-ring to a receiver attached to the outer cylinder pipe 4 by welding, and the inner cylinder pipe 6 is similarly connected to the inside thereof.

The nozzle 7 is provided with a central blow-off hole 10 communicating with the inner passage 8 and a large number of peripheral blow-off holes 11 communicating with the outer passage 9. The arrangement of the outlet holes of these nozzles 7 is shown in FIG.

A mounting plate 14 of a limit switch 15 is fixed to the operating cylinder 2, while an actuator 16 of the limit switch is fixed to the rear end of the shaft.

Next, the operation of this device will be explained.

Open the mold of the molding machine, send working fluid to the working cylinder 2 from the hose connected to the nipple 13,
The shaft body is advanced by the piston 5, and the nozzle 7 is advanced into the mold. When the nozzle 7 advances to a predetermined position, the actuator 16 switches the limit switch 15 (first
(on the left in the figure), the supply of working fluid to the working cylinder 2 is stopped, and the nozzle 7 is connected to the double chain line 7' in the figure.
Stop at the position. In this state, the pump 22 is operated to spray the required amount of mold release agent from the tank 24 through the inner passage 8 and from the center blowout hole 10 of the nozzle to the necessary locations of the mold cavity and core. Apply to.

When the application of the mold release agent is completed, the pump 22 is stopped, the working fluid is sent from the hose connected to the nipple 12 to the working cylinder 2, the shaft body is retreated by the piston 5, and the nozzle 7 is retracted out of the mold. Nozzle 7
When the nozzle 7 is retracted to a predetermined position, the actuator 16 operates the limit switch 15 (on the right side in FIG. 1), stops the supply of working fluid to the working cylinder 2, and stops the nozzle 7 at the position indicated by the solid line 7 in the figure.

Next, molding is performed using a metal mold, the mold is opened, and the product is taken out, after which the operating cylinder 2 is operated in the same manner as described above to insert the nozzle 7 between the molds.

The pump 32 is operated to feed the cleaning agent from the tank 34 to the outer passage 9 and to the outlet hole 11 around the nozzle.
Make it blow out. The peripheral air outlet 11 is the center air outlet 1.
Since a large number of cleaning agents are provided around the mold, the cleaning agent is spread over a wide area of the mold. After spraying the cleaning agent, a mold release agent is applied in the same manner as described above, and the next molding is performed.

This multi-liquid coating device applies two different types of liquids, such as a mold release agent and a cleaning agent, separately at different timings, and controls the time and control valves 21 and 31 for each of the mold release agent and cleaning agent. The control can be managed by computer and automated as sequence control.

By using cooling water instead of a cleaning agent, the mold can be cooled before applying the mold release agent, and it can also be used to enhance the mold release effect. By installing pipes and making the supply liquid passages triple, it is also possible to spray three liquids: mold release agent, cleaning agent, and cooling water.

In this embodiment, the shaft body having the nozzle 7 is moved back and forth by an operating cylinder, but this movement mechanism may also be driven by a motor.

As shown in Figs. 4 and 5, a male screw 42 is provided around an outer cylindrical pipe 4 constituting a shaft body, and a male screw sleeve 41 is rotated by an electric motor 40.
A male screw 42 is screwed into the nozzle. An appropriate guide member is provided on the shaft having the male screw 42, and the shaft is advanced and retreated by the rotation of an electric motor. It is also possible to fix a rack to the shaft, and advance and retreat the shaft with a pinion driven by an electric motor. These advance and retreat mechanisms can increase the distance the shaft can be moved, and are therefore suitable for cases where the nozzle position needs to be moved a large distance.

[Effect of idea]

The present invention allows the nozzle, which has been retracted from the application position, to move forward during application to bring its blow-out hole closer to the application area, allowing efficient application of multiple types of liquids to a predetermined area. Spraying can be performed separately with one compact coating device, and it can be used for applying mold release agent, cooling molds, cleaning, etc., and can automate these tasks, improving work efficiency. can be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a part of an embodiment of the present invention in cross section, Figs. 2 and 3 are enlarged views of the nozzle, Fig. 2 is a longitudinal sectional view, Fig. 3 is a front view, FIG. 4 is an explanatory diagram showing another embodiment, partially in cross section, and FIG. 5 is an enlarged sectional view of the main part of FIG. 4. 1... Fixed mold, 2... Working cylinder, 3...
...Bracket, 4...Outer tube pipe, 5...Piston, 6...Inner tube pipe, 7...Nozzle, 8...Inner passage, 9...Outer passage, 10...Center outlet hole,
11... Peripheral blow-off hole, 12, 13... Nipple,
14... Limit switch mounting plate, 15... Limit switch, 16... Actuator, 40... Electric motor, 41... Male screw sleeve, 42... Male screw.

Claims (1)

[Scope of utility model registration request] A shaft body on which the outer tube pipe 4 is arranged is installed so as to be movable forward and backward so as to form an outer passageway 9 around an inner tube pipe 6 forming an inner passageway 8, and a nozzle 7 is fixed to one end of the shaft body. The nozzle 7 is provided with a central blow-off hole 10 communicating with the inner passage 8 and a number of peripheral blow-off holes 11 communicating with the outer passage 9, and different liquids are supplied to each of the passages 8 and 9 of the shaft body. A multi-liquid coating device characterized in that means are connected.