JPH072131Y2 - Device for applying powdery heat insulating agent to the mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a coating device for coating a powdery heat insulating agent on a cavity surface of a molding die in die casting, resin molding or the like.

<Prior Art> The present applicant has previously proposed a die casting method in which a powdery heat insulating agent is applied to the cavity surface of a mold in Japanese Patent Laid-Open No. 1-299752, in which the cavity surface of the mold is It has been disclosed that the method of electrostatically applying the powdery heat insulating agent is most preferable when the powdery heat insulating agent is applied.

However, when the powdery heat insulating agent is actually electrostatically applied to the cavity surface of the mold, the powdery heat insulating agent that has not adhered to the cavity surface of the mold rises and scatters around, deteriorating the working environment, When applying the release agent to the cavity surface of the mold, there is a problem that the release agent splashes and wets the injection port of the powder heat insulating agent application nozzle.

<Problems to be solved by the invention> The present invention has been made in view of such a problem,
With a simple structure, it is possible to prevent the powdery heat insulating agent from scattering around when applying the powdery heat insulating agent to the mold cavity surface, and to apply the release agent to the mold cavity surface. Another object of the present invention is to provide a device for applying a powdery heat insulating agent to a mold that does not have the risk of the injection port of a coating nozzle for spraying a powdery heat insulating agent being moistened by a release agent.

<Means for Solving the Problem> A device for applying a powdery heat insulating agent to a mold of the present invention which achieves such an object is a spray device for spraying a release agent to a fixed mold and a movable mold, and a fixed mold. A dust collecting hood covering an upper part of a space formed by the mold and the movable mold, a window hole is formed in a part of the dust collecting hood, and the coating nozzle is fixed through the window hole to the fixed mold and the movable mold. And the upper and lower closing plates for closing the window holes are integrally attached to the upper and lower parts of the coating nozzle. is there.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In the figure, A is a well-known horizontal injection type die casting machine, and when the fixed mold 1 and the movable mold 2 are opened, a powdery heat insulating agent is applied to the surface of the cavity 3.

The coating device B for coating the powdery heat insulating agent on the surface of the cavity 3 composed of the fixed mold 1 and the movable mold 2 is basically a spray device for spraying a release agent on the surface of the cavity 3 (see FIG. (Not shown), a dust collecting hood 4 that covers the upper part of the space formed by the fixed mold 1 and the movable mold 2, a coating nozzle 5 for spray-coating the surface of the cavity 3 with a powdery heat insulating agent, and a collector. It is composed of an upper closing plate 10a, a lower closing plate 10b, etc. for closing the window hole 43 formed in the dust hood 4, and is fixedly installed on the diver 6 of the die casting machine A or the like.

The dust collecting hood 4 is a bottom opening portion that can cover an upper portion of a space 7 formed by the fixed mold 1 and the movable mold 2 when the mold is opened.
41 is formed in an appropriate shape, the dust collecting pipe 8 for absorbing the powdery heat insulating agent a therein is connected to the upper opening 42 thereof, and the bottom opening 41 is vertically provided on a part of the side wall. The opening 43 facing the window is opened so that it can be installed over the upper two divers 6 of the die casting machine A.

The window hole 43 is formed from the outside of the dust collecting hood 4 to the fixed mold 1 and the movable mold 2.
This is for allowing the coating nozzle 5 to freely pass over the space 7 between the and, and a part of the dust collecting hood 4 is hollowed so that the bottom opening part 41 faces up and down, and the partition plate 44 is installed there. A window hole 43 is formed in the partition plate 44.

Further, the coating nozzle 5 is for spraying and coating the powdery heat insulating agent a on the surfaces of the cavities 3 of the molds 1, 2, and the spraying nozzles 51a of the plurality of powder supply pipes 51 are provided with the support 52. Mold 1,2
The powder supply pipes 51 are connected in parallel to the powder heat insulating agent supply source pipes 54 via the manifolds 53, and the support bodies 52 of the dust collection hood 4 are connected to each other. It is connected to the rod 9a of the lifting cylinder 9 installed right above the window hole 43 via the bracket C, and the application nozzle 5 is passed through the window hole 43 of the dust collecting hood 4 with the lifting cylinder 9 to fix the fixed mold 1 And the movable mold can be moved back and forth freely.

The powdery heat insulating agent a sprayed from the coating nozzle 5 must be charged, but the powdery heat insulating agent a charged in advance is used.
May be ejected from the ejection port 51a of each powder supply pipe 51, or as in the illustrated embodiment, the ejection port of each powder supply pipe 51.
The electrode 55 connected to a high voltage generator (not shown) is disposed so as to face 51a, and the injection port 51a of each powder supply pipe 51 is arranged.
Alternatively, the powdery heat insulating agent a may be injected and charged at the same time.

In addition, the dust collecting hood 4 is provided above and below the coating nozzle 5.
The closing plates 10a and 10b for closing the insertion window hole 43 are integrally attached. These upper and lower closing plates 10a, 10b are formed in a flat plate shape that fits the window holes 43 of the dust collecting hood 4, and are placed at the upper and lower positions of the coating nozzle 5 via the support 52 or the support rod 56 of the coating nozzle 5, respectively. Install integrally. In the illustrated embodiment, the manifold 53 connecting the plurality of powder supply pipes 51 also serves as the upper closing plate 10a.

Thus, when the powdery heat insulating agent a is applied to the surfaces of the cavities 3 of the molds 1 and 2, the coating nozzle 5 is moved by the lifting cylinder 9 through the window hole 43 of the dust collecting hood 4 to the fixed mold 1. Between the movable mold 2 and the movable mold 2, and stopped at a predetermined position. Then, the window hole 43 of the dust collecting hood 4 is closed by the upper closing plate 10a, and in this state, the powdery heat insulating agent a is discharged from the coating nozzle 5.
Is injected (see FIGS. 1 and 2).

Further, when the mold release agent is applied to the surfaces of the cavities 3 of the molds 1 and 2, the coating nozzle 5 is lifted from between the fixed mold 1 and the movable mold 2 by the lifting cylinder 9 to collect the mold. Dust hood 4
When the dust collecting hood 4 is taken out of the dust collecting hood 4 through the window hole 43, the window hole 43 of the dust collecting hood 4 is closed by the lower closing plate 10b. Yes (see FIGS. 3 and 4).

<Effect of Device> Since the device for applying the powdery heat insulating agent to the mold according to the present invention is configured in this way, when the upper part of the space formed by the fixed mold and the movable mold is covered with the dust collecting hood. At the same time, the window hole for taking the application nozzle in and out of the dust collecting hood is also closed by the upper closing plate, so that when applying the powdery heat insulating agent to the cavity surface of the mold, the spray of the powdery heat insulating agent rises up. It can be prevented from scattering around.

Moreover, when the mold release agent is applied to the cavity surface of the mold, the coating nozzle is pulled out of the dust collecting hood and the window hole for inserting and removing the coating nozzle is closed by the lower closing plate, so that powder There is no fear that the spray nozzle of the coating nozzle for spraying the heat insulating agent will get wet with the release agent.

Further, since the opening and closing of the window hole of the dust collecting hood is automatically performed by the raising and lowering operation of the coating nozzle, a special mechanism for opening and closing the window hole is not required, and a simple structure can be obtained, which is inexpensive. Can be provided to.

Therefore, the intended purpose can be achieved.

[Brief description of drawings]

The drawing shows an example of the present invention, FIG. 1 is a vertical sectional front view showing a state in which a coating nozzle is inserted between a fixed mold and a movable mold, FIG. 2 is a cutaway perspective view of the same portion, and FIG. FIG. 4 is a vertical sectional side view showing a state in which the coating nozzle is pulled out of the dust collecting hood, and FIG. 4 is a perspective view of the same. In the figure, A: Die casting machine, B: Coating device 1: Fixed mold, 2: Movable mold 3: Cavity, 6: Diver 4: Dust collecting hood, 43: Window hole 5: Coating nozzle, 7: Space 10a , 10b: Closure plate

Claims (1)

[Scope of utility model registration request] 1. A spray device for injecting a release agent onto a fixed mold and a movable mold, and a dust collecting hood for covering an upper part of a space formed by the fixed mold and the movable mold. A window hole is formed in the portion, and a coating nozzle for spray-coating the powdery heat insulating agent on the mold cavity surface is made movable forward and backward between the fixed mold and the movable mold through the window hole. An apparatus for applying a powdery heat insulating agent to a mold, wherein an upper closing plate and a lower closing plate for closing the window hole are integrally attached to the upper and lower portions of the coating nozzle, respectively.