JP2002144005A - Spraying device in die casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spraying device in a die casting machine with which after shutting off the supply of releasing agent to a nozzle holder, the dripping- down of the releasing agent from a nozzle held with the nozzle holder can be minimized. SOLUTION: A switch valve 22 is disposed at the lowermost part of a spraying head body 21 and a releasing agent receiving/supplying hole 14a in the nozzle holder 11 is disposed at the upper part from the switch valve 22, and the releasing agent is supplied while going against the gravity acted to the releasing agent from the switch valve 22 to the releasing agent receiving/ supplying hole 14a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray device for a die casting machine which sprays a release agent onto a die surface of a die of the die casting machine.

[0002]

2. Description of the Related Art In a die casting machine, after a product is cast, a release agent is applied to a mold surface of a mold from which the product has been taken out. The application of the release agent is generally performed by a spray device. Various types of spray devices are known. For example, a spray head having a large number of nozzles for spraying a release agent is moved between a mold in an open state to release the release agent. Is sprayed onto a mold surface. FIG. 9 is a cross-sectional view showing the configuration of a spray head of a spray device disclosed in Japanese Patent Application Laid-Open No. 61-212355, and FIG. 10 is a side view of the spray head viewed from the direction of arrow A in FIG. As shown in FIG. 9, the spray head 101 is held by a moving means (not shown) so as to be movable between the molds in the mold open state, and includes a spray head main body 126 and the spray head main body 1.
Nozzle holder 140 detachably fixed to 26
It is basically composed of

As shown in FIG. 10, the nozzle holder 140 is formed of a horizontally long rectangular member, and a plurality of spray nozzles 143 are attached to the lower end of the nozzle holder 140 along the longitudinal direction by an attachment member 155. The flow control valve 145 is provided on the upper end side in correspondence with each nozzle 143. Further, inside the nozzle holder 140, a release agent channel 151 and an air channel 152 are formed along the longitudinal direction. Communication passages 151a and 152a are formed in a direction orthogonal to the release agent flow path 151 and the air flow path 152, respectively. The communication paths 151a and 152a are formed from the mounting surface of the nozzle holder 140 to the spray head main body 126. It is open. The release agent L is supplied to the release agent flow path 151 from the spray head main body 126 through the communication path 151a, and the compressed air is supplied to the air flow path 152 from the spray head main body 126 through the communication path 152a.

[0004] Between the release agent channel 151 and the air channel 152, the release agent L supplied to the release agent channel 151 is supplied to the air channel 152 side so that the air is released. A release agent supply nozzle 144 for mixing the release agent L is provided. The release agent supply nozzle 144 penetrates a wall between the release agent flow path 151 and the air flow path 152, and a space between the penetrating portion and the nozzle 144 is sealed by a seal member 156. ing. The air flow path 152 includes a mounting member 155.
The release agent supply nozzle 144 extends from the upper end side of the release agent flow path 151 to the inside of the through-hole of the mounting member 155 through the air flow path 152. An overflow groove 157 is formed along the longitudinal direction on the upper end side of the release agent flow path 151, and the upper end of the nozzle 144 is located in the overflow groove 157.

The flow control valve 145 is constituted by an adjusting screw 158 having a conical tip projecting into the overflow groove 157, and a screw is formed on the outer periphery of the adjusting screw 158. It is screwed to the upper end. The conical tip of the adjusting screw 158 faces the opening end of the release agent supply nozzle 144, and adjusts the screwing amount of the adjustment screw 158 to adjust the adjustment screw 158 and the release agent supply nozzle 144. The opening area of the opening end of the release agent supply nozzle 144 can be adjusted by adjusting the distance to the opening end of the release agent. By adjusting the opening area, the release agent supply nozzle 144 is connected to the air flow path 15.
The amount of the release agent L supplied to the second side is adjusted. The screwing position of the adjusting screw 158 is fixed by a nut 159.

[0006] In the spray head body 126, a releasing agent supply path 126a and the air supply passage 126b are formed respectively, these openings 126a ₁ and the opening which is open to the mounting surface of the nozzle holder 140 is mounted 1
26b ₁ respectively. Openings 126a ₁ and the opening 126b ₁ are respectively communicate with 152a of the communication passage 151a of the nozzle holder 140. Around the openings 126a ₁ and the opening 126b _1, in order to prevent the leakage of a releasing agent L and the air from between the nozzle holder 140 and the spray head body 126 is provided with a sealing member 153 and sealing member 154 ing.

At the upper and lower ends of the mounting surface side of the nozzle holder 140, dovetails 140a and 140b are integrally formed.
Fixing members 146a and 146b for forming a dovetail portion corresponding to 140b are provided vertically. The upper fixing member 146 a is fixed to the spray head main body 126 by a bolt 149 via a holding plate 147 and a washer 148.

An opening / closing valve 141 for supplying and stopping the release agent L is provided in the middle of the release agent supply passage 126a in the spray head main body 126. On-off valve 14
Numeral 1 is provided in a valve chamber 126c having a distal end formed in the middle of the release agent supply passage 126a. Open / close valve 141
Has a piston portion on the rear end side, and the piston portion is movably fitted to the inner periphery of the cylinder chamber 126d.
The space between the valve chamber 126c and the cylinder chamber 126d is sealed by a seal member 142a. Cylinder chamber 12
The compressed air supply passages 126e and 126f communicate with the compressed air supply passage 6d, respectively.
The 6f side is sealed by a seal member 142b provided on the piston portion of the on-off valve 141. When compressed air is supplied from the supply path 126f, the open / close valve 141 is opened.
Moves forward, and the conical tip of the opening / closing valve 141 is placed in the valve chamber 1.
Close the opening of 26c. Thereby, the nozzle holder 14
The supply of the release agent L to 0 is shut off. When compressed air is supplied from the supply path 126f, the opening / closing valve 141 is retracted, and the release agent L is supplied to the nozzle holder 140 from the release agent supply path 126a through the valve chamber 126c. The release agent L supplied to the nozzle holder 140 is supplied to the release agent supply nozzle 14.
4, is supplied into the through hole of the attachment member 155, is mixed with the compressed air, and is sprayed from the spray nozzle 143.

[0009]

By the way, in the spray device having the above-mentioned structure, various flow paths are formed in the spray head main body 126 and an opening / closing valve is built in. Therefore, there is a problem that the processing of the spray head main body 126 is difficult, and the processing cost increases. For this reason, the spray device 201 shown in FIG. 11 has a structure in which a general-purpose opening / closing valve is externally attached to the spray head body. A spray device 201 shown in FIG.
An opening / closing valve 220 is externally attached to one side surface, and a nozzle holder 210 is mounted on the opposite side surface. At the lower end of the nozzle holder 210, a plurality of nozzles 211 are provided downward. A release agent supply path 203 is formed substantially horizontally inside the spray head main body 202, and the release agent supply path 203 is formed by the opening / closing valve 220 and the nozzle holder 2.
10 is communicated. When the release agent L is supplied from the release agent supply port 205 formed in the spray head body 202, the release agent L is supplied to the opening / closing valve 220 and the release agent supply path 2
03, and reaches the nozzle holder 210. However, if the opening / closing valve 220 is externally attached, the release agent supply path 203 becomes long, and the opening / closing valve 220
When the supply of the release agent is shut off by the
03 leaves a large amount of the release agent L. Release agent supply path 2
Since 03 is disposed horizontally, the remaining release agent L gradually flows out to the nozzle holder 210, the release agent L from the nozzle 211 continues dripping for a long time, and a large amount of release agent is discharged. There was the problem of sagging.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and minimizes dripping of a release agent from a nozzle held by a nozzle holder after interrupting supply of the release agent to the nozzle holder. It is an object of the present invention to provide a spray device for a die casting machine that can be limited to a limited number.

[0011]

According to the present invention, there is provided a spray apparatus for a die casting machine, wherein a nozzle for spraying a mold release agent on a die surface of a mold is held at a lower end portion, and the mold release agent is supplied through the nozzle. A nozzle holder having a release agent receiving port, a release agent supply path on which the nozzle holder is mounted and communicating with the release agent receiving port of the nozzle holder, and the release supply of a release agent supplied from the outside A spray head body having an on-off valve for supplying and shutting off to the road, and a spray head body with the nozzle holder mounted thereon are moved to a predetermined spray position with respect to the opened mold while maintaining a constant posture. A spraying device for a die-casting machine having a moving means for moving the spray head, wherein the on-off valve is disposed at a lowermost portion of the spray head main body, and the release agent receiving port of the nozzle holder is provided with the on-off valve. Remote is disposed upward, at least from the on-off valve until the releasing agent-receiving opening, and supplying a release agent while defy gravity acting on the release agent.

Preferably, a release agent supply path from the on-off valve to the release agent receiving port has a vertically extending portion extending substantially vertically upward, and a leading end of the vertical extension portion communicating with the release agent supply passage. And an inclined portion inclined obliquely upward toward the mold receiving port.

[0013] More preferably, said nozzle holder comprises:
The spray head body is provided on each side surface facing the opened mold.

In the present invention, the pressure is supplied from the opening / closing valve to the release agent receiving port while opposing the gravity acting on the release agent, that is, while applying a certain pressure to the release agent. When the on-off valve is closed during the supply of the release agent, and the supply of the release agent from the spray head body side to the nozzle holder side is shut off,
The release agent remains in the release agent supply path from the on-off valve to the release agent receiving port. In the present invention, the on-off valve is disposed at the lowermost portion of the spray head body, the release agent receiving port is disposed at a position higher than the on-off valve, and the release agent is released from at least the on-off valve while resisting gravity. It supplies to the agent receiving port. Therefore, when the on-off valve is closed, a weight toward the on-off valve acts on the release agent remaining in the release agent supply passage from the on-off valve to the release agent receiving port. Therefore, it is possible to minimize the amount of the release agent flowing out from the release agent receiving port to the nozzle holder side. It is possible to quickly suppress the release of the release agent.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a spray device of a die casting machine according to an embodiment of the present invention. Note that FIG. 1 shows only a part of the configuration of the die casting machine. Spray device 1 shown in FIG.
Has a base member 2 installed on a fixed die plate 51 of a die casting machine, a moving mechanism unit 3 installed on the base member 2, and a spray head 10 held by the moving mechanism unit 3.

The fixed die plate 51 holds a fixed die 53 and is fixed on a base of a die casting machine (not shown). The fixed die plate 51 is connected to a link housing (not shown) by a plurality of tie bars 52 penetrating the movable die plate 54. The movable die plate 54 holds a movable mold 55 and is movably provided on a base of a die casting machine (not shown) so as to face the fixed die plate 51.

Normally, a toggle mechanism is provided between the movable die plate 54 and the link housing, and the toggle mechanism moves the movable die plate 54 and the link housing closer to or away from each other, whereby the fixed mold 53 and the movable mold are moved. 5
5 is opened and closed and the mold is closed.

The moving mechanism 3 includes a support portion 4 and two link members 5, one end of which is rotatably connected to the support portion 4.
6 and an arm 7 to which the other ends of the link members 5 and 6 are rotatably connected.

The link member 5 and the link member 6 are respectively connected to the support 4 and the arm 7 so as to be substantially parallel to each other. Turn. When the link member 5 and the link member 6 turn, the arm 7 is provided because the link member 5 and the link member 6 are provided substantially parallel to each other.
Moves while maintaining a substantially constant posture. For this reason, the arm 7
The position of the spray head 10 held at the tip of the link member 5 is also changed by the turning of the link members 5 and 6, but the posture is kept substantially constant.

FIG. 2 is a diagram showing a schematic configuration of the spray head 10. As shown in FIG.
Is the spray head body 2 fixed to the tip of the arm 7
1 and a nozzle holder 11 mounted on the spray head body 21 and holding the nozzle 12. The nozzle holder 11 holds a plurality of nozzles 12 at its lower end for spraying a release agent onto the mold surfaces of the fixed mold 53 and the movable mold 55. The nozzle 12 is formed of a deformable material. As shown in FIG. 1, the tip of the nozzle 12 is deformed into various shapes so that the tips of the fixed mold 53 and the movable mold 55 It can be directed to various positions. The release agent sprayed from the nozzle 12 is applied so that the die cast product cast by the fixed mold 53 and the movable mold 55 is easily separated from the mold surface.

FIG. 3 is a side view in which a part of the nozzle holder 11 viewed from the side mounted on the spray head body 21 is broken. As shown in FIG.
The mounting surface 11a has a horizontally long rectangular shape. The mounting surface 11a has a release agent receiving port 14a through which the release agent is supplied from the spray head main body 21 side, and compressed air is supplied to the spray head main body 21 side. Air receiving port 15a supplied from the
And are open.

In the inside of the nozzle holder 11, a release agent flow path 14 and an air flow path 15
Are formed. The release agent channel 14 and the air channel 15 communicate with the release agent receiving port 14a and the compressed air receiving port 15a, respectively. The release agent flow path 14 and the air flow path 15 are each formed in two rows, and the two rows of the release agent flow path 14 and the air flow path 15 are in communication with each other.

The release agent L supplied to the release agent flow path 14 is supplied to the air flow path 15 side between the release agent flow path 14 and the air flow path 15 so that the air is removed. A release agent supply nozzle 16 for mixing the release agent L is provided. The release agent supply nozzle 16 penetrates a wall between the release agent flow path 14 and the air flow path 15. The space between the penetrating portion and the release agent supply nozzle 16 is sealed by a seal member 17.

The above-mentioned nozzle 12 is fixed to a lower end of the nozzle holder 11 by a mounting member 13. The through-hole 13 a of the mounting member 13 communicates with the air channel 15. The release agent supply nozzle 16 extends from the upper end side of the release agent channel 14 to the inside of the through hole 13 a of the mounting member 13 through the air channel 152.

At the upper end of the nozzle holder 11, a flow regulating valve 18 is provided corresponding to each nozzle 12.
The flow control valve 18 includes an adjusting screw 19 having a conical tip projecting into the release agent flow path 14 and a nut 20 to which the adjusting screw 19 is screwed. A screw is formed on the outer periphery, and is screwed into a screw hole formed at the upper end of the nozzle holder 11.
The conical tip of the adjusting screw 19 faces the open end of the release agent supply nozzle 16. Adjustment screw 1
By adjusting the screwing amount of No. 9 and adjusting the distance between the adjusting screw 19 and the opening end of the release agent supply nozzle 16, the opening area of the opening end of the release agent supply nozzle 16 can be adjusted. The release agent supply nozzle 1 is adjusted by adjusting the opening area.
The amount of the release agent L supplied from 6 to the air flow path 15 side is adjusted. The screwing position of the adjusting screw 19 is fixed by a nut 20.

The spray head main body 21 is held at the distal end of the arm 7, and corresponds to the nozzle holders 11 mounted on both sides of the arm 7, and an operation unit 41 for mounting the nozzle holder 11 to the spray head main body 21. And a support portion 27, and an on-off valve 22 at the lowermost portion. The spray head body 21 has a supply port 23 to which the release agent L is supplied from the outside, and the release agent L supplied from the supply port 23 to the inside of the on-off valve 2.
2 is formed. In addition, the spray head body 21 applies the release agent to the nozzle holder 1 respectively.
A release agent supply passage 24 that communicates with the on-off valve 22 for supplying the supply agent 1 is formed therein. Further, the spray head main body 21 has a compressed air supply passage 26 formed therein for supplying compressed air supplied from outside (not shown) to each nozzle holder 11.

The on-off valve 22 is driven by, for example, an air cylinder, and the supply port 2 of the spray head main body 21 is opened.
The supply and cutoff of the release agent L supplied from 3 to the nozzle holder 11 are performed.

The release agent supply passage 24 communicates with an on-off valve 22 provided at the lower end of the spray head main body 21 to extend substantially vertically upward, and a distal end of the vertical extension 24b. And an inclined portion 24c which is communicated with and inclined obliquely upward. Vertical extension 24b
The release agent present in the release agent supply passage 24 constituted by the inclined portion 24c and the release agent is always applied with a force directed to the on-off valve 22 by gravity.

FIG. 4 shows the mounting surface 11 of the nozzle holder 11.
FIG. 6 is a view of a mounting surface of a spray head body 21 to which a is mounted. As shown in FIG. 4, on the mounting surface 21 a of the spray head main body 21, a release agent supply port 24 a communicating with the release agent supply path 24, and a compressed air supply port 26 a communicating with the compressed air supply path 26 are provided. The release agent supply port 24a and the compressed air supply port 26a are formed at positions corresponding to the release agent supply port 14a and the compressed air supply port 15a opened on the mounting surface 11a of the nozzle holder 11. ing. A seal member 29 is provided on the outer periphery of the release agent supply port 24a. The seal member 29 is provided between the mounting surface 11a of the nozzle holder 11 and the spray head main body 2.
The release agent L is interposed between the first mounting surface 21a and the release agent L from leaking from between the mounting surface 11a and the mounting surface 21a. A seal member 30 is provided on the outer periphery of the compressed air supply port 26a. The seal member 30 prevents the compressed air from leaking from between the mounting surface 11a and the mounting surface 21a.

FIG. 5 is an enlarged sectional view of the operation section 41 and the support section 27. The operation unit 41 includes a handle unit 42
, A screw shaft 43, a pressing member 44, a detent lever 46, and a screw member 47. The screw shaft 43 and the pressing member 44 of the operation portion 41 are guided by a guide portion formed by the cover member 49 and the fixing member 21s. The cover member 49 is fixed to the fixing member 21s by bolts 64 and 65. Also, the fixing member 21s
Is fixed to an upper plate 21t provided at the upper end of the spray head body 21 by bolts 60,
It is also fixed to the spray head body 21 by bolts 63.

FIGS. 6A and 6B are diagrams showing a connection relationship between the screw shaft 43 and the pressing member 44, wherein FIG. 6A is a plan view and FIG.
Is a side view. As shown in FIG. 6, the screw shaft 43 has an engaging portion 43a at the tip, and a screw portion 43c is formed on the outer periphery of the shaft portion. A small diameter portion 43b is provided between the engagement portion 43a and the screw portion 43c. On the other hand, the pressing member 44
Is formed of a member having a rectangular external shape, a front end surface 44a having a flat end surface, a notch portion 44b with which the engaging portion 43a of the screw shaft 43 is engaged, and a screw shaft formed continuously with the notch portion 44b. And a shaft fitting portion 44c in which the small diameter portion 43b of the shaft 43 is fitted.

The engaging portion 43a of the screw shaft 43 is
The screw shaft 43 and the pressing member 44 move in the axial direction integrally with each other by engaging with the notch portion 44b. The screw shaft 43 is rotatable with respect to the pressing member 44.

As shown in FIG. 5, a handle portion 42 is connected to the upper end of the screw shaft 43. By rotating the handle portion 42, the screw shaft 43 can be rotated. The screw shaft 43 is screwed into a screw hole 47 a formed in the screw member 47. The screw member 47 is fixed to the fixing member 21s by a bolt 61. The screw shaft 43 is a screw hole 47a of the screw member 47.
, It moves forward or backward depending on the rotation direction of the screw shaft 43.

The detent lever 46 has a detent lever 46a and a screw part 46b provided at the tip of the detent lever 46a.
Is screwed. The detent lever portion 46 rotates the detent lever 46a in a certain direction,
The rotation of the screw shaft 43 can be restricted.

The screw shaft 43 and the pressing member 44 connected to the screw shaft 43 are provided at an angle of 30 ° with respect to the mounting surface 21a of the spray head body 21. On the other hand, as shown in FIG.
Are provided on the back side of the upper and lower ends of the mounting surface 11a.
Inclined surface 11c inclined at an angle of 60 degrees with respect to
And 11d. Therefore, the pressing member 44
Are perpendicular to the inclined surface 11c. Further, since the distal end surface 44a of the pressing member 44 is formed of a plane perpendicular to the screw shaft 43, the distal end surface 44a
Contact parallel to c.

The support portion 27 is made of a horizontally long member provided on the lower end side of the mounting surface 21a of the spray head main body 21, and is fixed to the spray head main body 21 by bolts 62. The support portion 27 has a support surface 27a that faces the lower inclined surface 11d of the nozzle holder 11 and supports the inclined surface 11d. The support surface 27a of the support portion 27 is inclined at an angle of 60 degrees with respect to the mounting surface 11a.

Next, a method of attaching and detaching the nozzle holder 11 in the spray device 1 of the die casting machine having the above-described configuration will be described. First, from the state shown in FIG. 5, when the handle portion 42 and the rotation preventing lever 46a are both turned in a predetermined direction (leftward), the handle portion 42, the screw shaft 4
3 and the pressing member 44 move in the direction of the arrow B1 shown in FIG. 5, and the distal end surface 44a of the pressing member 44 separates from the upper inclined surface 11c of the nozzle holder 11. When the pressing member 44 moves to a position where it does not interfere with the nozzle holder 11,
The nozzle holder 11 can be removed from the spray head body 21.

When the nozzle holder 11 is mounted on the spray head body 21, the inclined surface 1 of the nozzle holder 11
1d is fitted to the support surface 27a of the support portion 27, and the mounting surface 11a of the nozzle holder 11 and the spray head body 21
Is brought into contact with the mounting surface 21a. When the handle portion 42 is rotated in a predetermined direction (rightward) from this state, the handle portion 42, the screw shaft 43, and the pressing member 44 are rotated.
Moves in the direction of arrow B2 in FIG. The tip surface 44a of the pressing member 44 is the upper inclined surface 11 of the nozzle holder 11.
When the nozzle holder 11 abuts on the nozzle c, the nozzle holder 11 does not fall off from the spray head body 21.

Further, the pressing member 44 is advanced, and for example, as shown in FIG. 7, a force F is applied vertically from the distal end surface 44a of the pressing member 44 to the inclined surface 11c of the nozzle holder 11. When a force F is applied vertically to the inclined surface 11c of the nozzle holder 11, a vertical component Fb of the force F perpendicular to the mounting surface 21a of the spray head main body 21 sprays the upper end of the mounting surface 11a of the nozzle holder 11. It acts as a force pressing against the mounting surface 21a of the head main body 21.

Of the above-mentioned force F, the spray head main body 2
The component Fa parallel to the first mounting surface 21a acts as a force for pushing the nozzle holder 11 downward.
By the action of the force for pushing the nozzle holder 11 downward, the lower inclined surface 11 of the nozzle holder 11 is formed.
d receives a reaction force R from the support surface 27 a of the support portion 27.
Of the reaction force R, a vertical component Rb perpendicular to the mounting surface 21a of the spray head main body 21 acts as a force for pressing the lower end side of the mounting surface 11a of the nozzle holder 11 against the mounting surface 21a of the spray head main body 21. Vertical component Rb
And the vertical component Fb have substantially the same size, and the upper and lower ends of the mounting surface 11a of the nozzle holder 11 are pressed against the mounting surface 21a of the spray head main body 21 with a uniform force. As a result, a substantially uniform surface pressure is generated between the mounting surface 11a of the nozzle holder 11 and the mounting surface 21a of the spray head main body 21.

When a substantially uniform surface pressure is generated between the mounting surface 11a of the nozzle holder 11 and the mounting surface 21a of the spray head main body 21, the release agent supply port 24a opened on the mounting surface 21a is opened. The seal member 29 provided around the periphery is substantially evenly crushed. Further, as the handle portion 42 is turned, the surface pressure between the mounting surface 11a and the mounting surface 21a increases. Therefore, with sufficient surface pressure generated,
By operating the rotation preventing lever 46a, the rotation of the screw shaft 43 is restricted. Thereby, the mounting surface 11 of the nozzle holder 11 is
a and a high sealing performance between the mounting surface 21a of the spray head body 21 and the release agent can be reliably prevented from leaking out from between the mounting surface 11a and the mounting surface 21a. it can.

An example of the operation of the spray device 1 of the die casting machine having the above configuration will be described. In the die casting machine, a die-cast product is cast by the fixed mold 53 and the movable mold 55, and the fixed mold 53 and the movable mold 5 are cast.
In the state where the die-cast product is taken out by opening the mold 5,
The spray head 10 of the spray device 1 is located above the fixed die plate 51 as shown in FIG.
When the die-cast product is taken out of the mold by a transfer device such as an articulated robot, for example, the link members 5 and 6 of the spray device 1 are turned to rotate the spray head 10.
Is positioned at a predetermined spray position between the opened mold 53 and the mold 55.

In this state, the release agent is sprayed from the nozzles 12 held on the nozzle holders 11 mounted on both sides of the spray head body 21 toward the mold surface of the mold. At this time, the blowing directions of the nozzles 12 of the nozzle holders 11 provided opposite to the dies 53 and 55 are set such that the release agent is evenly sprayed on the mold surfaces of the dies 53 and 55. Have been. The release agent is sprayed from the nozzle 12 by the on-off valve 2 provided on the spray head body 21.
2 is opened, the release agent is supplied to each nozzle holder 11 from the spray head main body 21 side, and the compressed air is supplied to each nozzle holder 11.

When the operation of spraying the release agent onto the mold surfaces of the molds 53 and 55 is completed, the on-off valve 22 is closed, and the supply of the release agent from the spray head body 21 to each nozzle holder 11 is stopped. Here, the operation of the spray device 1 of the die casting machine according to the present embodiment after the supply of the release agent is stopped will be described with reference to FIG. In the spray device 1 according to the present embodiment, in the release agent supply path 24 from the on-off valve 22 provided at the lower end of the spray head main body 21 to each nozzle holder 11, there is no element that regulates the flow of the release agent. not exist. Therefore, the on-off valve 22 is connected to the spray head main body 21.
The release agent receiving port 14a of the nozzle holder 11 is disposed above the on-off valve 22. The release agent receiving port 14a of the nozzle holder 11 extends from the on-off valve 22 to the release agent receiving port 14a of the nozzle holder 11. The structure is such that the release agent is supplied while opposing the gravity acting on the release agent. For this reason, immediately after the on-off valve 22 is closed and the supply of the release agent to the release agent supply path 24 is stopped, a part of the release agent remaining in the release agent supply path 24 is supplied to the nozzle holder 11. However, as shown in FIG.
The release agent supply path 24 is composed of a vertically extending portion 24b extending substantially vertically upward, and an inclined portion 24c which communicates with the tip end of the vertically extended portion 24b and is inclined obliquely upward. Only a part of the release agent L ₀ existing at the tip of 24 c flows out to the nozzle holder 11 side, and most of the remaining release agent L remains in the release agent supply path 24.

That is, in the present embodiment, since the release agent supply path 24 from the on-off valve 22 to each nozzle holder 11 is constituted by the vertically extending portion 24b and the inclined portion 24c,
Since the release agent tries to move the release agent supply path 24 toward the on-off valve 22 side by its own weight, after the supply of the release agent is stopped,
The dripping of the release agent from the nozzle 12 of the nozzle holder 11 quickly stops.

As described above, according to the present embodiment, the release agent remaining in the release agent supply passage 24 is removed from the nozzle holder 11 after the supply of the release agent is stopped by utilizing the gravity acting on the release agent. From the nozzle 12 can be prevented. As a result, it is possible to prevent the inside of the factory from being contaminated with the release agent. Further, according to the present embodiment, the opening / closing valve 22 is arranged at the lowermost portion of the spray head main body 21, so that the surface of the spray head main body 21 facing the fixed mold 53 and the moving mold 55 are opposed to each other. Nozzle holders 1 for fixed mold 53 and movable mold 55 on the surface
1 can be adopted.

In this embodiment, the release agent supply passage 24 from the on-off valve 22 to each nozzle holder 11 is constituted by the vertically extending portion 24b and the inclined portion 24c. However, the flow path in each nozzle holder 11 is also inclined. It may be configured to be connected to the portion 24c and inclined. Also, although difficult from the processing point of view, the vertical extension portion 24b and the inclined portion 24c are not used.
The release agent supply path 24 may be configured to be curved.

[0048]

According to the present invention, it is possible to minimize the dripping of the release agent from the nozzle held by the nozzle holder after the supply of the release agent to the nozzle holder is cut off.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a spray device of a die casting machine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a spray head 10.

FIG. 3 shows a spray head body 21 of the nozzle holder 11;
FIG. 5 is a side view in which a part viewed from the side mounted on the device is broken.

FIG. 4 is a view of a mounting surface of a spray head body 21 on which a mounting surface 11a of a nozzle holder 11 is mounted.

FIG. 5 is an enlarged sectional view of an operation unit 41 and a support unit 27;

6A and 6B are diagrams showing a connection relationship between a screw shaft 43 and a pressing member 44, wherein FIG. 6A is a plan view and FIG. 6B is a side view.

FIG. 7 is a diagram for explaining a force relationship acting on the nozzle holder 11 by pressing by a distal end surface 44a of a pressing member 44.

FIG. 8 is a view for explaining a state of the release agent in the release agent supply path 24 after the supply of the release agent to the release agent supply path 24 is stopped.

FIG. 9 is a sectional view showing a configuration of a spray head of a spray device disclosed in Japanese Patent Application Laid-Open No. 61-212355.

10 is a side view of the spray head of FIG. 9 as viewed from the direction of arrow A.

FIG. 11 is a view showing still another example of the spray head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Spray apparatus of die-casting machine 2 ... Base member 3 ... Moving mechanism part 4 ... Support part 5, 6 ... Link member 7 ... Arm 10 ... Spray head 51 ... Fixed die plate 52 ... Tie bar 53 ... Fixed die 55 ... Moving metal Mold 21: Spray head main body 22 ... Open / close valve 23 ... Supply port 24 ... Release agent supply path 41 ... Operating part 42 ... Handle part 11 ... Nozzle holder 12 ... Nozzle 13 ... Mounting member 14 ... Release agent flow path

Claims (3)

[Claims] 1. A nozzle holder for holding a nozzle for spraying a release agent on a mold surface of a mold at a lower end thereof, the nozzle holder having a release agent receiving port for communicating with the nozzle and supplying the release agent, and the nozzle holder. Has a release agent supply path communicating with the release agent receiving port of the nozzle holder, and an opening / closing valve for supplying and shutting off the release agent supplied from the outside to the release agent supply path. A spray device for a die casting machine, comprising: a spray head main body; and a moving unit configured to move a spray head main body to which the nozzle holder is mounted to a predetermined spray position with respect to the opened mold. A release agent receiving port of the nozzle holder is disposed above the on-off valve, and at least from the on-off valve to the release agent receiving port. Spray device of the die casting machine and supplying a release agent while defy gravity acting on the release agent. 2. A release agent supply path from the on-off valve to the release agent receiving port has a vertically extending portion extending substantially vertically upward, and communicates with a tip of the vertical extension portion to communicate with the release agent. The spray device for a die casting machine according to claim 1, further comprising: an inclined portion inclined obliquely upward toward the receiving port. 3. The spray device for a die casting machine according to claim 1, wherein the nozzle holder is provided on each side of the spray head body facing the opened mold.