JPS6033943Y2 - Sand molding machine for denture molding, etc. - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a sand molding machine that is most suitable for molding dentures, etc.

Hitherto, the so-called lost wax method has been commonly used as a method for manufacturing dentures, and the dentures have been manufactured using a sand molding machine (cruzi pull former) shown in FIGS. 1 to 3.

That is, a base plate 10 made of hard rubber or the like is formed with a conical protrusion 11, and a runner rod 1 is mounted on the top of the conical protrusion 11.
2 is erected and there is a screwed material (
The tooth mold) 13 is glued 14.

After that, the ring 15 is glued 16 to the base plate 10 with wax or the like.
Then, raw material sand is poured into it, and Material 13 is buried therein.

After the raw material sand has hardened, the runner rod 12 is removed and the sand mold 17 is placed in a furnace to melt the material 13.

As a result, a female mold is formed inside, and molten metal or the like is poured through the runner formed by removing the runner rod 12 to obtain an object having the same shape as the material.

In the one shown in FIG. 2, the ring 15 is made of flexible plastic, and a part of the ring is cut off to make it easier to remove from the sand mold 17.
It is held in a ring shape at 8 mag.

Therefore, in this type only the sand mold 17 can be heated.

In the ring 15 shown in FIG. 3, a heat-resistant material such as iron is used, and the ring 15 cannot be removed from the sand mold 17, but is heated together with the sand mold 17.

However, in the above-mentioned conventional sand molding machine, the material 13 needs to be glued carefully.
Be sure to separate this from the base plate 10 after adhering the materials.
However, as mentioned above, it must be easy to remove, so the adhesive has to be weak, which can lead to accidents such as raw sand leaking or the ring coming off during work. There has occurred.

Further, in the case shown in FIG. 2, since there is a stepped portion 19 at the joint of the ring 15, there is a drawback that cracks are likely to occur in the sand mold 17.

The purpose of this invention is to eliminate the drawbacks of the conventional ones mentioned above,
It is an object of the present invention to provide a sand mold molding machine that not only makes it easy to make a sand mold, but also eliminates the risk of raw sand leaking out, and also allows the sand mold to be easily removed and prevents cracks from occurring. .

Below, the configuration of the present invention will be explained as shown in FIGS. 4 and 5, which are examples thereof.
This will be explained based on the diagram.

In the figure, reference numeral 1 denotes a cup-shaped container made of an elastic material, which in the embodiment is made of soft rubber, and a small diameter hole 3 is bored in the bottom surface 2 of the container.

Note that the material of the cup-shaped container may be soft resin or the like.

Reference numeral 4 is a plastic rod in the form of a rod, which can be tightly fitted into the small diameter hole 3, and a material 6 is precisely adhered to the tip 5 with wax 7.

When manufacturing a sand mold, first, the other end 4a of the plastic rod 4 to which the material 6 is attached as described above is inserted from above the small diameter hole 3, and the material 6 is inserted into the cup-shaped container 1.
Place it inside.

Next, raw material sand 8 is poured into the cup-shaped container 1 and hardened.

After hardening, the plastic rod 4 is pulled out and the sand mold is removed from the cup-shaped container 1. At this time, the sand mold can be removed very easily by blowing compressed air through the small diameter hole 3.

Since the cup-shaped container 1 is integrally molded from an elastic material, there are no seams on the inside, and unlike conventional sand molds, there are no accidents such as cracks in the sand mold or rings coming off during the process, and sand mold production. can concentrate on.

Furthermore, since the sand mold can be removed very easily, workability is also good.

According to the sand mold molding device according to the present invention, it is a sand mold molding device for casting molds such as dentures by the lost wax method,
A cup-shaped container made of an elastic material such as soft rubber and having a small diameter hole bored in its bottom to be filled with molded river sand, and a rod-shaped body with a mold attached to one end. Since the mold can be placed inside the cup by tightly inserting the other end of the rod-shaped body into the small diameter hole, there is no possibility of cracks occurring in the sand mold or molding during the work process as in conventional molds. There is no risk of the container separating, and a high-quality sand mold can be obtained.

Moreover, since the molding device is made of an elastic material, it is extremely easy to remove the sand mold, and the molding device has excellent features such as being able to greatly improve work efficiency.

[Brief explanation of the drawing]

1 to 3 are perspective views showing a conventional sand mold molding device, FIGS. 4 and 5 show an embodiment of the sand mold molding device according to the present invention, FIG. 4 is an overall perspective view, and FIG. The figure is a perspective view showing the working process. 1...Cup-shaped container, 3...Small diameter hole,
4...Plastic rod as a rod-shaped body, 6...
...Data, 7...Wax, 8...Raw material sand.

Claims (1)

[Scope of Claim for Utility Model Registration] A sand molding device for casting molds of dentures etc. by the lost wax method, which is made of an elastic material such as soft rubber to fill the molded river sand, and the bottom surface of the sand molding device is It consists of a cup-shaped container in which a small diameter hole is bored and a rod-shaped body to which a mold is attached to one end, and the mold is placed inside the cup by tightly inserting the other end of the rod-shaped body into the small hole. A sand molding machine characterized by: