JP2018051621A - Atomizer head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of difficulty that an optimal fine amount of a mold release agent is applied a die-casting mold.SOLUTION: An atomizer head comprises: a supporting body; a nozzle fixed to the supporting body, jetting the mold release agent from the tip and drilled with a mold release agent feed tube guiding the mold release agent at the center; a cap provided at the supporting body, in which the tip side is drilled with a through hole with a diameter slightly larger than the outer diameter of the nozzle tip part, and mounted between the inside of the through hole and the outside of the nozzle tip part so as to have a small-allowance gap; a flange part that is provided between the nozzle tip part and the base end part thereof and whose diameter is expanded in a direction crossed with the lease agent feed tube; and a slit milled around the flange part and extending in a direction parallel to the extending direction of the mold release agent feed tube.SELECTED DRAWING: Figure 2

Description

  The present invention is an atomizer head for applying a release agent to a die-casting mold, minimizing the amount of the release agent to be applied to the mold, and further making the applied release agent fine particles and storing them in the mold It is intended to remove the generated heat rapidly.

  When producing die-cast products, a mold release agent is injected into the mold to improve the mold releasability from the mold. In this case, even after taking out the product from the mold, an excessive release is required. Since the mold material remains in the mold, air is sprayed onto the mold to blow away the residual mold release agent, but it is difficult to completely remove the mold release agent from the mold. The agent remains or the release agent scatters around, causing deterioration of the environment.

In addition, if the amount of release agent applied to the mold is unstable, or the temperature of the mold becomes unstable and uneven coating occurs, excess mold release agent remains in the mold, resulting in the product. There is a risk that a release agent is mixed, gas is generated, or moisture is mixed into the product, resulting in a defective product.
In order to prevent this, various atomizer heads that appropriately apply a release agent to a mold have been proposed.

  Japanese Patent No. 4276899

  JP 2009-279494 A

  Patent Document 1 described above describes a method for applying a water-soluble release agent and the like, and discloses an optimum method for applying a release agent to a die casting mold.

  Moreover, the said patent document 2 describes the atomizer head which sprays a molten metal.

  However, although the patent document 1 describes various conditions for the method of applying the water-soluble release agent to the die casting mold, the atomizer head is not described.

  Moreover, although the said atomizer head is described in the said patent document 2, a mold release agent is not apply | coated to a die-casting metal mold | die.

  In general, an atomizer that sprays a release agent onto a die casting mold is such that air is injected from the center of a nozzle and the release agent is injected from the periphery of the atomizer. It was difficult to suppress to a small amount.

  In the present invention, a small amount of a release agent is stably sprayed onto a die casting mold.

(1) The present invention is an atomizer head for injecting a mold release agent to a die casting die, the support being fixed to the support and connected to the support from the mold release agent. , A nozzle having a release agent supply pipe for injecting the release agent from the tip and guiding the release agent in the center, and the support, and being separated from the base end of the nozzle. A release agent supply means for supplying a mold agent, and a through hole having a diameter slightly larger than the outer diameter of the nozzle tip on the tip side, and between the inside of the through hole and the outside of the nozzle tip A cap that is mounted to have a small clearance, a flange that is provided between the nozzle tip and the base, and that expands in the direction intersecting the release agent supply pipe, and A slit cut around and extending in a direction parallel to the extending direction of the release agent supply pipe, and a base end of the flange A carrier gas supply means for supplying a carrier gas from the nozzle, the release agent being transferred from the base end portion toward the tip end portion in the nozzle and sprayed to the outside from the nozzle tip end, and the carrier gas is supplied to the flange portion From the base end side of this, it passes through the said slit and is injected outside from the said gap | interval.

  According to the present invention, the release agent is transferred from the proximal end portion toward the distal end portion within the nozzle and injected to the outside from the nozzle distal end, and the carrier gas passes through the slit from the proximal end side of the flange portion and passes through the slit. Since the carrier gas is sprayed to the outside at a high speed from the gap, a small amount of mist-like release agent can be sprayed onto the mold so as to cover the release agent.

(2) It is preferable that the slit is formed so as to rotate in a spiral shape when the carrier gas supplied from the base end side is sent to the tip end side.
When the slit is formed in this manner, the release agent fired from the tip of the nozzle is accurately jetted forward on the carrier gas flowing in a spiral shape.

(3) It is preferable that the plurality of slits are formed at a predetermined same angle with respect to the direction of the central portion of the collar portion.
When the plurality of slits are configured in this way, the carrier gas passing through the slits is ejected at a predetermined angle, and rotates in a vortex shape along the angle.

(4) The slit cutting direction is preferably in the range of 20 degrees to 70 degrees with respect to the direction of the central portion of the collar portion, and most preferably around 45 degrees.
At this angle, the carrier gas rotates most efficiently in a vortex.

(5) It is preferable that the slit is formed deep on the carrier gas injection side and shallow on the carrier gas supply side.
If comprised in this way, the carrier gas by the side of injection will rotate further, and a strong spiral will be formed.

(6) The gap between the inside of the cap through-hole and the outside of the nozzle tip is preferably in the range of 0.05 mm to 0.15 mm, and most preferably around 0.1 mm.
When the gap is of this size, the carrier gas is injected most efficiently.

(7) Preferably, the release agent supply means is provided with a switching means for supplying or stopping the release agent, and the change means is configured to operate in conjunction with the carrier gas supply means.
If comprised in this way, a release agent will be supplied simultaneously with the timing at which carrier gas is injected, and a release agent can be injected efficiently.

(8) It is preferable that the switching unit is operated by a carrier gas, and is switched in a direction in which the release agent is supplied when the carrier gas is supplied to the flange portion.
With such a configuration, since the switching means is operated by the carrier gas, it is not necessary to separately provide the switching means, and the structure is simple and inexpensive.

(9) It is preferable that the nozzle and the cap are detachably attached to the support.
If comprised in this way, a peeling agent can be easily inject | poured on various conditions only by replacing | exchanging a nozzle and a cap.

(10) The carrier gas is preferably air.
A special gas is not used as a carrier gas, and it can be used anywhere by using air.

  In the present invention, the release agent is transferred from the base end portion toward the tip end portion in the nozzle and injected to the outside from the nozzle tip end, and the carrier gas passes through the slit from the base end side of the flange portion and passes through the small gap. Since the carrier gas is sprayed to the outside at a high speed, a small amount of mist-like release agent can be sprayed onto the mold so that the carrier gas covers the mold release agent.

It is a longitudinal cross-sectional view of the non-operation state of one embodiment of this invention. It is a longitudinal cross-sectional view of the operation state of one embodiment of this invention. It is an external appearance perspective view of one embodiment of the present invention. It is an external appearance perspective view of the nozzle of one embodiment of the present invention. It is a top view of the nozzle of one embodiment of the present invention. It is a top view of the nozzle of one embodiment of the present invention. 5 and 6 are drawn by the single angle method.

FIG. 1 is a longitudinal sectional view of the atomizer head in a non-operating state according to the present embodiment. A cylindrical neck portion 2 is formed to protrude from an upper portion of a cylindrical body 1 as a support body. A male screw 4 into which a cap 3 having a cylindrical shape at the bottom and a truncated cone shape at the top is screwed is formed on the outer periphery.
In the present embodiment, air is used as the carrier gas.

A female screw 5 is formed on the cylindrical inner surface of the cap 2 so as to be screwed into the male screw 4 of the neck 2, and a through hole 6 is formed at the center of the upper frustoconical portion. ing.
Further, a stepped portion 7 is cut out inside the portion formed in the truncated cone shape.

  A nozzle 8 extending in the vertical direction is inserted into the neck 2 of the cap 3 from below. A release agent supply pipe 9 extending in the same direction as the extending direction of the nozzle 8 is formed in the axial center portion of the nozzle 8.

  A flange portion 10 having an outer diameter corresponding to the inner diameter of the neck portion 2 is formed at a substantially central portion in the extending direction of the nozzle 8, and a male screw 14 to be screwed into the body 1 is formed at the lower end portion. Yes. The male screw 14 is not always necessary, and the nozzle 8 may be pressed against the body 1 by a tightening force between the female screw 4 of the cap 3 and the male screw 5 of the neck 2.

  An upper cylindrical portion 11 of the nozzle 8 is inserted into the through hole 6 of the cap 3, and between the outer diameter (3.85 mm) of the upper cylindrical portion 11 and the inner diameter (4.05 mm) of the through hole 6. Is formed with a gap 12 of 0.1 mm.

  The upper end of the nozzle 8 is a release agent spraying portion, the tip of which is sharpened in the shape of a truncated cone, and a stepped portion 7 cut out inside the cap 3 around the upper surface of the flange portion 10. An annular portion 13 that abuts the projection is provided. When the annular portion 13 abuts on the stepped portion 7, the positional relationship between the cap 3 and the nozzle 8 is defined.

As shown in FIGS. 4, 5, and 6, the nozzle 8 has a direction parallel to the extending direction of the release agent supply pipe 9 around the flange portion 10 (vertical direction in FIG. 4). Six slits 15 penetrating through the collar portion 10 are formed in each of the slit portions 15, and each of these slits 15 is formed at an angle α (45 degrees) with respect to the direction of the central portion of the ten collar portion. ing.
The slit 15 is formed so that the air injection side 15A is deep and the air supply side 15B is shallow.

  A cylindrical cylinder 16 is formed in the lower portion of the body 1 at the nozzle 8 mounting portion, and a piston 17 is slidably inserted in the interior thereof. A bottomed cylindrical valve body 29 that controls supply and stop of the release agent to the 8 release agent supply pipes 9 is formed. The outer diameter of the valve body 17 is smaller than that of the cylinder 16 so that the release agent can move around the valve body 17.

  In the lower part of the valve body 29, a horizontal flow path 18 of a release material that penetrates the piston 17 in a cross shape in the horizontal direction is bored, and a vertical passage extending vertically downward from the center of the horizontal flow path 18 is formed. A flow path 19 is formed.

  The central portion of the piston 17 is formed with a large diameter, and the cylinder 16 has a large diameter portion 27 corresponding to the large diameter portion 26 of the piston 17, and the longitudinal section of the cylinder 16 is convex. Is formed.

A cylindrical orifice perforation pin 20 is inserted and fixed in the vertical flow path 19, and an orifice 21 for controlling the flow rate of the release agent is formed at the bottom of the orifice perforation pin 20.
A lid 23 having a release agent introduction hole 22 formed in the center is fixed to the lower end of the body 1.

  Further, the piston 1 is pushed upward at the lower portion of the large-diameter portion 26 of the piston 17 of the body 1, and the lower end of the release agent supply pipe 9 of the nozzle 8 is closed by the valve body 29. A first air passage 24 is formed, and an air discharge port 25 of the first air passage 24 is located toward a closed space formed by the large-diameter portion 26 and the lid portion 23 of the piston 17. .

On the opposite side of the piston 17 of the first air passage 24, a second air passage 28 for air as a carrier gas is formed, and the second air passage is a lower portion of the housing 10 of the orifice 8. A third air passage 30 is provided to extend to the air discharge port 31 and to push down the piston 17 to open the valve body 29 from the lower end of the release agent supply pipe 9 of the nozzle 8. Has been.
Although not shown in the drawing, the second air passage 28 extends to a symmetrical portion via the nozzle 8, and the air discharge port 31 is also formed to a symmetrical portion via the nozzle 8. The air is supplied to the lower surface of the flange 10 from the two air outlets 31 at symmetrical positions.

  The air discharge port 32 of the third air passage 30 is located toward a fine closed space above the large-diameter portion 26 of the piston 17. 33 is a rubber O-ring.

  The body 1 is provided with a fixing hole 34 for fixing the atomizer head to a device for applying a release agent to a die casting mold.

  The above is the structure of an embodiment of the present invention. Next, the operation of the embodiment will be described.

  When the atomizer is not operating, as shown in FIG. 1, the air is supplied from the first air passage 24 to the closed space formed by the large-diameter portion 26 and the lid portion 23 of the piston 17 via the air discharge port 25. Is done.

  Then, due to the air pressure, the piston 17 moves upward in the cylinder 16, the valve body 29 is pressed against the upper end of the cylinder 16, and the release agent in the horizontal flow path 18 is moved to the nozzle by the valve body 29. 8 is prevented from moving to the release agent supply pipe 9, and the release agent does not flow out of the release agent supply pipe 9.

Next, when the atomizer is operated, as shown in FIG. 2, the supply of air from the first air passage 24 is stopped first, and then the air is supplied to the second air passage 28.
Then, air is also supplied to the third air passage 30 branched from the second air passage 28, and the piston 17 is increased in size through the air discharge port 32 from the third air passage 30. It is supplied to a fine closed space above the diameter portion 26.

  Thereby, the piston 17 moves downward in the cylinder 16 by the air pressure, and the valve body 29 is separated from the upper end of the cylinder 16.

At this time, the mold release agent is simultaneously supplied from the introduction hole 22 into the horizontal flow path 18 via the orifice 21 of the orifice drilling pin 20.
Then, the release agent in the horizontal flow path 18 passes around the valve body 29 and is supplied to the release agent supply pipe 9 of the nozzle 8, and the release agent from the tip of the release agent supply pipe 9. Is injected to the outside.

  At this time, at the same time as the piston 17 moves downward, air is also supplied from the second air passage 28 through the air discharge port 31 to the lower portion of the flange portion 10 of the nozzle 8.

The air supplied to the lower part of the flange part 10 passes through the slit 15 of the flange part 10 and rotates, while being outside the upper cylindrical part 11 of the nozzle 8 and the inside of the through hole 6 of the cap of the nozzle 8. It is injected outside through a small clearance 12 provided.
Then, the mold release agent injected from the mold release agent supply pipe 9 rides on the air vortex to form a mist, and is vigorously injected from the tip of the nozzle 8 toward the die casting mold. Become.

  As described above, in the present embodiment, simply by supplying air to the second air passage 28, the piston 17 operates and the valve body 29 is supplied to the release agent supply pipe 9. Since the side passage is opened and air can be expelled toward the tip of the nozzle 8 at the same time, it is not necessary to supply the air for injection and the opening operation of the valve body 8 by different means.

  In the present embodiment, the amount of ejected liquid is set to 0.5 CC / second, the liquid pressure is set to 0.2 MPa, and the air pressure is set to 0.4 MPa. However, if the orifice 21 of the orifice drilling pin 20 is appropriately changed, it is desired. The discharge conditions can be set as follows.

DESCRIPTION OF SYMBOLS 1 Body 2 Neck part 3 Cap 4 Female screw 5 Male screw 6 Through-hole 7 Step part 8 Nozzle 9 Release agent supply pipe 10 Gutter part 11 Upper cylindrical part 12 Gap 13 Annular part 14 Male screw 15 Slit 15A Injection side 15B Supply side 16 Cylinder 17 Piston 18 Horizontal flow path 19 Vertical flow path 20 Orifice drilling pin 21 Orifice 22 Introduction hole 23 Lid 24 First air passage 25 Air discharge port 26 Large diameter part (piston)
27 Large diameter part (cylinder)
28 Second air passage 29 Valve body 30 Third air passage 31 Air discharge port 32 Air discharge port 33 O-ring 34 Fixing hole

Claims (10)

An atomizer head that injects a release agent into a die casting die,
A support;
A release agent supply pipe fixed to the support and supplied with a release agent from a proximal end connected to the support, injecting the release agent from the tip, and guiding the release agent to the center. A drilled nozzle,
A release agent supply means provided in the support, for supplying a release agent from the base end of the nozzle;
A cap that has a through hole that is slightly larger than the outer diameter of the nozzle tip on the tip side, and that is mounted so as to have a small clearance between the inside of the through hole and the outside of the nozzle tip. When,
A collar portion provided between the nozzle tip portion and the base end portion, and having a diameter expanded in a direction intersecting with the release agent supply pipe;
A slit cut around the flange, and extending in a direction parallel to the extending direction of the release agent supply pipe;
A carrier gas supply means for supplying a carrier gas from the base end side of the collar part, and the release agent is transferred from the base end part toward the tip part in the nozzle, and jetted from the nozzle tip to the outside. The atomizer head according to claim 1, wherein the carrier gas is ejected from the gap through the slit from the base end side of the flange portion.   The atomizer head according to claim 1, wherein the slit is formed so as to rotate in a spiral shape when the carrier gas supplied from the base end side is sent to the tip end side.   The atomizer head according to claim 1 or 2, wherein a plurality of slits are formed at a predetermined same angle with respect to the direction of the central portion of the collar portion.   The atomizer head according to claim 3, wherein a slit cutting direction is in a range of 20 degrees to 70 degrees with respect to a direction of a central portion of the collar portion.   5. The atomizer head according to claim 1, wherein the slit is formed deep on a carrier gas injection side and shallow on a carrier gas supply side.   The atomizer head according to any one of claims 1 to 5, wherein the gap is in a range of 0.05 mm to 0.15 mm.   The atomizer head according to any one of claims 1 to 6, wherein the release agent supply means is provided with a switch means for supplying or stopping the release agent, and the switch means operates in conjunction with the carrier gas supply means.   The atomizer head according to claim 7, wherein the switching unit is operated by the carrier gas and is switched in a direction in which the release agent is supplied when the carrier gas is supplied to the flange portion.   The atomizer head according to any one of claims 1 to 8, wherein the nozzle and the cap are detachably attached to a support.   The atomizer head according to any one of claims 1 to 9, wherein the carrier gas is air.

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