JP2832834B2 - Spray device for die casting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mold release agent spray device for a die of a die casting machine.

[Related Art] Conventionally, a spray device in a die casting machine has been a spray device dedicated to mixing spray or a spray gun dedicated to spray gun spray.

The mixing head of the conventional mixing spray system has a structure as shown in FIG. 2 (b), and a plurality of mixing heads are prepared according to a mold.
It had been replaced with a cassette type.

On the other hand, the spray gun method, in which a die-cast product having a better surface property than the mixing spray method is obtained, has a high cost for the spray gun. Is not economical.

Therefore, in the spray gun system, it was adjusted and used according to the mold each time.

[Problems to be Solved by the Invention] However, in the conventional spray apparatus, a plurality of mixing heads are prepared in the mixing spray system and can be replaced according to a mold. There is a disadvantage that a large amount of a release agent is used.

On the other hand, the spray gun spray method has fine spray particles and no dripping, which improves the surface properties of the die-cast product, and requires less consumption of the release agent.
Due to the high cost of the gun head spray gun, it is not economical to prepare multiple gun heads for the mold. Therefore, in the spray gun spray method,
In each case, it is necessary to make adjustments in accordance with the mold, and there is a problem that the setup time becomes longer.

As described above, both the conventional mixing spray method and the spray gun spray method have their advantages and disadvantages, so both can be used with a single spray device for the production of many types. There was inconvenience that there was not.

In view of the above, the present invention, when using a spray device, can cope with the production of many types with a single spray device, has a short setup time, and combines the advantages of a mixing head with the advantages of a gun head. It is an object of the present invention to provide a versatile spray device having the same.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a mixing device.
It has a mixing head for mixing spray which is detachably attached to the block and a gun head for spray gun spray to be selectively used, and the mixing head replaces the gun head by a die casting product manufactured by a die casting machine. It is characterized by facilitating selective use.

That is, the mixing block is provided with a release agent valve, a release valve air opening / closing check valve, and a stopper means for the check valve, and when the mixing head is used,
Opening the stopper means to operate the check valve, opening the release agent valve and introducing the release agent, supplying the release agent air to open the check valve, and immediately after the check valve The release agent and the release agent air are mixed and sent to the release agent port of the mixing head, and distributed from the tips of a plurality of release agent ejection nozzles provided in the mixing head. The release agent ejected and the mainstream air of the release agent air directly flowing into the mixing head directly before the check valve are joined at the tip of the release agent ejection nozzle to form the release agent. Atomizing the mold agent, ejecting from a plurality of nozzles arranged coaxially with the plurality of release agent ejection nozzles, and continuing to supply the release agent air for a while after closing the release agent air,
The mold release agent remaining in the mixing head is blown off and cleaned.

When the gun head is used, the check valve is closed by pressing the stopper means of the mixing block, and the mixing head is removed from the mixing block by removing the mixing head from the mixing block. Exchange, attach. The gun head has an air port communicating with an air port for delivering air of the mixing block, and a plurality of air blow nozzles attached to the gun head and connected to the air port of the gun block are dedicated to air blowing. A plurality of spray guns are arranged at variable mounting positions on the head, and a plurality of branch pipes of the release agent communicating with the release agent port of the mixing block and the air pipe dedicated to the air blow are separately provided to the air source. A plurality of branch pipes for release agent air which are connected and piped are connected to the plurality of spray guns.

According to the present invention, when a mixing spray is used, a mixing head is mounted on the mixing block, and the stopper means of the check valve, which is provided inside the mixing block, is opened to perform the check. Activate the valve and open the release agent valve provided in the mixing block.

By the operation of the check valve, a part of the release agent air supplied from the air source to the mixing block is mixed with the release agent introduced by opening the release agent valve immediately after the check valve. The mixture is sent to the release agent port of the mixing head and is distributed and ejected from the tips of a plurality of release agent ejection nozzles in the mixing head. The main flow of the release agent air supplied to the mixing block is directly sent to the mixing head from just before the check valve, and distributed to and sent to the tips of the plurality of release agent ejection nozzles. The release agent is jetted from a plurality of nozzles disposed coaxially with the plurality of release agent ejection nozzles by being combined with the release agent ejected from the plurality of release agent ejection nozzles to atomize the release agent, After closing the release agent valve, the release agent air is continuously supplied for a while to remove the remaining release agent.

When using a spray gun sprayer, the stopper means of the mixing block is pressed to close the check valve, the mixing head is removed from the mixing block, and the gun head is attached.・ The gun that communicates with the block air port
High-pressure air is blown from a plurality of air blow nozzles attached to and attached to the air port of the head to perform air blow.

When the air blow is completed, a branch pipe for the release agent which is next variably mounted on the gun head and communicates with the release agent port of the mixing block, and an air pipe dedicated to the air blow are separately provided. A spray gun spray can be performed by a plurality of spray guns connected to a branch pipe for release agent air that has been piped, and both a mixing spray and a spray gun spray can be performed by one spray device. .

Example Next, an example of the present invention will be described with reference to the drawings.

In FIG. 1 (a), two guide rods 2 and 3 slidably guided on a frame (not shown) by flanges 2a and 3a are attached to a mixing block 1, and a piston of a pneumatic hydraulic cylinder is provided. The rod 4 is attached and moved up and down by a movable device (not shown) using the two guide rods 2 and 3 as guides.

The mixing head 5 has a structure in which the tab tails 8 of the mixing head 5 are pressed by pressing pieces 6 and 7, and bolts (not shown) are tightened and fixed. Such a detachable structure is not limited to the illustration.

A nozzle 46 is attached to the mixing head 5, and the nozzle 46 is made of a small-diameter copper tube, and its tip is bent to fit the mold.

When using spray gun spray, the gun
A head 10 is used instead of the mixing head 5.
The gun head 10 is also configured to be detachable from the mixing block 1 similarly to the mixing head.

A branch pipe 12 for release agent and a branch pipe 13 for release agent air are connected to the gun head 10. A spray pipe is provided at the end of the branch pipe 12 for release agent and the branch pipe 13 for release agent air. Gun 11 is attached.

The spray gun 11 is supported by a support fitting 14, and the support fitting 14 is further fixed to a support rod 15 by a fixing bolt.
It can be moved up and down along the support bar 15 and can be fixed at an appropriate position according to the mold.
The fixture 17 to which the support rod 15 is attached is attached to the support rod 18, and can be moved in the longitudinal direction along the support rod 18 to be fixed at an appropriate position. The support rod 18 is
It is attached to a bracket 19 fixed to the head 10.

The hose 20 of the release agent air dedicated to the spray gun is detachably joined to the fixed pipe 22 by a hose joint 21, and has a replaceable structure.

FIG. 2 (a) is a cross-sectional view of a part of the mixing block 1. In FIG. 2, reference numeral 23 denotes a release agent port which is connected to the release agent port 23 of the guide rod 2 in FIG. 1 by a flange 2a. Have been. The guide rod 2 is hollow and forms a flow path for pressure-feeding the release agent.

The control of the inflow and the stop of the release agent is performed by operating a piston 26 which is provided in the cylinder 27 and is attached to the release agent valve 24, so that the release agent valve 24 and the valve seat 25 are controlled. This is performed by opening and closing the flow path.

Reference numeral 28 denotes a check valve, which is slidably inserted into the valve case 30. The stopper means 32 of the check valve 28 is screwed so that the stopper 32a moves left and right with the screw 33, and the tip engages with the check valve 28. When the mixing head 5 is used, the position of the rod 32b is changed to the left-hand position, and since the rod 32b at the tip does not press the check valve 28, the check valve is activated. , The premix chamber 35 feeds air and the gun head
When 10 is used, it will be in the state of the right row and the rod 32b at the tip
Pushes the check valve 28 against the valve seat 29 to stop the operation of the check valve.

Numeral 34 denotes a release agent air passage which communicates with the release agent air port through the hole of the hollow rod of the guide rod 3 in FIG.

In the case of using a mixing head, as shown in FIG. 2 (a), the stopper 32a is moved leftward by the stopper means 32 to activate the check valve 28, and the release agent valve 24 is When opened by the left row of 26, the release agent flows into the premix chamber 35, and when the release agent air is opened from the check valve 28 and ejected from the flow path 36, the release agent and the release agent are released. The air is mixed in the premix chamber 35. The mixed release agent flows from the release agent port 37 into the release agent port 39 of the mixing head 38 shown in FIG. 2 (b), further flows into the distribution path 40, and flows in the longitudinal direction of the mixing head 38. Distributed to
It passes through a plurality of needle valves 41 and is ejected from a plurality of nozzles.

On the other hand, the release agent air flows into the release agent air port 43 from the flow path 34 of the mixing block 1, mixes with the release agent of the nozzle 42 at the throat 45 from the distribution path 44, and is atomized to form a plurality of nozzles. Squirted from 46.

FIG. 4 is a block diagram showing the mixing head 38.
Is used.

In FIG. 4, reference numeral 47 denotes a release agent pressurizing tank, which pressurizes the release agent pressurizing tank 47 with pressurized air 48 whose pressure has been adjusted. The release agent is pumped to 23.

On the other hand, the release agent air is supplied with air of 4 kg / cm ² or more from the air source 50 through the pressure regulating valve 51, and the solenoid valve 5
2 to the mixing block air port.

53 is the cylinder 27 for opening and closing the release agent valve 24.
This is a solenoid valve that supplies air pressure to the solenoid valve. Numeral 54 denotes a solenoid valve for air blow, which directly supplies high-pressure air from the air source 50, ejects high-pressure air from the nozzle 46 of the mixing head 38 through the mixing block 1, and adheres to the mold. It is used to blow off and remove small pieces of casting.

 The above description is for the case of using a mixing head.

 Next, the case of using a gun head will be described.

The gun head 10 having the structure already described with reference to FIG. 1B is attached to the mixing block 1 (see FIG. 1A) instead of the mixing head 5.

As shown in the block diagram of FIG. 4, the gun release agent air device 55, the fixed pipe 22, and the hose joint 21 are connected to the gun
It has been added for the head.

The hose joint 21 is of a one-touch type as a detachable joint.

FIG. 5 is a block diagram showing the mixing block 1 and the gun head 10. In the case where the mixing head 38 is used, the check valve 28 is operated. When used, as shown in FIG. 3 (a), the check valve 28 is pressed so as not to be operated by the stopper means 32. Therefore, when represented by a symbol, it is like the mixing block 1 in FIG. Turns into.

In the air blow, when the solenoid valve 54 shown in FIG. 4 is opened and high-pressure air is supplied to the mixing block 1, the release agent valve 24 and the check valve 28 are closed as shown in FIG. 3A. The air blows into the air port 56 of the air blow shown in FIG. 3B communicating with the release agent air flow path 34, and ejects high-pressure air from the plurality of air blow nozzles 58 through the distribution path 57.

Next, when the air blow is completed, the release agent air dedicated for the gun is supplied from the release agent air device 55 for the gun, and the solenoid valve 53 is operated to open the release agent valve 24 to release the release agent. And connected to a plurality of spray guns 11 via hoses 12 from a release agent port 61 of the gun head 10 through a distribution passage 59.

Further, the release air for the gun is connected to the gun head 10 from the fixed pipe 22 through the hose joint 21, and the plurality of spray guns are
Connected to 11.

As described above, the hoses 12 and 13 form branch pipes for the release agent and the release agent air.

FIGS. 6 (a) and 6 (b) are perspective views of another embodiment.

In this embodiment, the same members as those in FIGS. 1 (a) and 1 (b) are denoted by the same reference numerals and description thereof is omitted.

In FIG. 6 (a), the mixing block 1
In addition, a release agent air port 62 dedicated to the gun is provided and connected to the fixed pipe 22 by the hose 20. The release agent air port 62 dedicated to the gun is bent and communicates with the port 63. When the mixing head 5 is used, it is not used, so that the mixing head 5 has no port hole.

The gun head 10 is provided with a port 64 communicating with the port 63.
From the spray gun 11 is supplied to the spray gun 11.

In the case of the first embodiment, as shown in FIG. 1 (b), the hose 20 was directly connected to the gun head 10 with the release agent air dedicated to the gun, and the hose joint 21 was attached and detached. This is not necessary in the embodiment, and the mounting and detachment are simple and convenient.

[Effects of the Invention] As described above, according to the present invention, the mixing head for mixing spraying and the gun head for spray gun spraying can be changed by one spraying device, as described above, in the shape and quality of the die-cast product. Can be selected, and can be interchanged with each other to shorten the setup time, thereby improving productivity and quality, and providing a versatile spray device.

[Brief description of the drawings]

1 (a) and 1 (b) are perspective views of an embodiment of the present invention, FIG. 2 (a) is a sectional view taken along line AA of FIG. 1 (a), and FIG.
FIG. 2B is a sectional view of the mixing head 5 shown in FIG. 1A, and FIG. 3A is a sectional view taken along the line AA of FIG. 1A, similar to FIG. 2A. FIG. 1 (b) is a sectional view of the gun head 10 of FIG. 1 (b), FIG. 4 and FIG.
FIG. 6 (a) and FIG. 6 (b) are perspective views of another embodiment. 1 ... mixing block, 5 ... mixing head, 9 ... release agent air port, 10 ... gun head, 11 ...
Spray gun, 24 ... Release agent valve, 28 ... Check valve, 31 ... Spring, 42 ... Spout nozzle, 46 ... Nozzle.

Claims (1)

(57) [Claims] 1. A movable device having a pipe for feeding a release agent and a release agent port for sending the release agent, a pipe for sending air, and an air port for sending the air. A mixing block; and a release agent port for introducing a release agent and an air port for introducing air, which are respectively connected to the release agent port and the air port of the mixing block when attached to the mixing block. The mixing
A mixing head for mixing spray and a gun head for spray gun spray removably attached to the block, wherein the mixing head or the gun head is simply attached to or replaced with the mixing block. A spray device for a die casting machine, characterized in that the spray device is a mixing spray device and a spray gun spray device that can easily select and use a mixing spray device or a spray gun spray device with one spray device.