KR200169529Y1 - Ventilator for casting mould - Google Patents

Abstract

The present invention relates to a die casting vantilator, in which the inclined surface 11 is formed at the bottom edge of the outside and has a cylindrical shape, and has a vent hole penetrating the upper and lower surfaces at regular intervals up, down, left and right. The exhaust hole is characterized in that it is configured to be an equilateral triangle exhaust hole 1 constituting an equilateral triangle, but arranged to be repeatedly arranged while shifting each other.

Description

Vantilator for Casting Molds

The present invention relates to a vantilator for casting molds, and more particularly to a vantilator for aluminum casting molds.

When injecting molten metal into the mold, air, gas, water vapor, etc. in the mold should be quickly discharged from the mold. For this purpose, a hole is formed in the inner upper surface of the upper mold, and then the ventilator 10 is inserted into the hole. Commonly used to insert the exhaust pipe 101. The vantilator may use more than one plural number. The vantilator plays an important role of preventing the molten metal from leaking while smoothly discharging the gas and water vapor generated during the injection of the air and the molten metal into the mold. On the other hand, the vantilator 10 is formed in a cylinder-like shape, the inclined surface 11 is formed at the bottom of the bottom to be easily inserted when inserted into the hole of the mold as described above, a number of exhaust so that the upper and lower surfaces are penetrated Holes are formed while maintaining a constant gap in the top, bottom, left and right. In the conventional ventilator, the above-described exhaust hole is constituted by a spherical exhaust hole 1a.

However, the following vantilizer has been found the following disadvantages will be described in detail. As described above, the conventional ventilator is formed with the regular exhaust holes 1a maintained at regular intervals in the up, down, left, and right directions. Therefore, the gas and water vapor generated during the injection of the air and the molten metal stayed in the mold are discharged to the outside of the mold through the garden exhaust hole 1a. However, looking at Figure 3, it can be seen that the space between the top and bottom and left and right of the garden exhaust hole 1a is the same, but the space in the diagonal direction is much wider than the space between the top and bottom and the left and right. Therefore, the conventional bantilator has a disadvantage in that the exhaust effect is not good because the ratio of the exhaust area per unit area is not large. Particularly, since the exhaust hole has a garden shape, the exhaust effect resistance due to the slug is large, high quality castings are produced. There is a physical disadvantage that is not achieved. In other words, referring to FIG. 5, slugs are attached to each side of the garden exhaust holes 1a as if they form a film, and in the center there is a hole S1 formed by the slugs. It has a small diameter that is less than The reason for this phenomenon is that when the liquid molten metal is filled into the mold and filled, slugs with light specific gravity rise above the molten metal, which is caused by surface tension caused by the surface tension that occurs when the liquid is in contact with the edge of the solid. The film is formed as shown in FIG. 5 while being attached to the edge of the hole 1a to form a hole S1 formed by a slug having a small diameter in the center. The hole S1 formed by the slug has a shape that is nearly circular because the garden exhaust hole 1a has a shape of a garden. Because of this phenomenon, air, gas, and water vapor in the mold cannot be discharged smoothly through the ventilator, which in turn adversely affects the formation rate of the casting and the formation time of the casting, which causes the failure to obtain the best product.

Accordingly, the object of the present invention is to provide a ventilator capable of smoothly discharging air, gas and water vapor in a mold.

In order to achieve the above object, the present invention is a conventional casting mold vantilator in which the inclined surface 11 is formed at the bottom edge of the outer side and has a cylindrical shape and exhaust holes penetrating the upper and lower sides at regular intervals up, down, left and right: The exhaust hole is characterized in that it is configured to be an equilateral triangle exhaust hole 1 constituting an equilateral triangle, it is arranged to be repeated repeatedly while shifting each other.

1 is a reference diagram showing a state of use of the present invention.

2 is a perspective view showing the most preferred embodiment of the present invention.

3 is a reference diagram showing an exhaust hole configuration of a conventional vantilator.

4 is a reference diagram showing the exhaust hole configuration of the present invention.

5 is a reference diagram showing a slug state formed in an exhaust hole of a conventional vantilator.

6 is a reference diagram showing a slug state formed in the exhaust hole of the present invention.

Explanation of symbols on the main parts of the drawings

1: equilateral triangle exhaust hole 1a: garden exhaust hole

S, S1: hole formed by slug 10: vantilator

11: slope 100: upper mold

200: lower mold 101: exhaust pipe

120: molten metal injection tube 130: pressure bath tube

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. And, in describing the present invention, if a detailed description of the related known function or configuration may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention is a conventional casting mold vantilator formed with a slope 11 formed on the outer bottom edge as described above and the exhaust hole penetrating the upper and lower surfaces in a cylindrical shape at regular intervals up, down, left and right; The exhaust hole is configured to be an equilateral triangle exhaust hole 1 forming an equilateral triangle, but is configured to be arranged repeatedly repeatedly while being shifted from each other. As shown in FIG. 4, the equilateral triangle exhaust holes 1 are arranged repeatedly and alternately arranged upward and downward. Since the intervals between the equilateral triangular exhaust holes are substantially the same in the right and left as well as in the diagonal directions, the exhaust area ratio per unit area is larger than that of the conventional vantilator, so that the first exhaust operation is performed smoothly.

And as can be seen in Figure 6 the forward triangular exhaust hole 1 of the present invention is a form of slug is significantly different than the conventional form. That is, since the three sides have the same length but the three sides form a straight line and the angle between the sides is maintained at 60 degrees, the angle formed by the three edges when the slug is formed (attached) to the three sides by surface tension ( Acute angles cause capillary action, which eventually causes the slug to rush toward the three corners. Therefore, the slug having affinity is concentrated at three corners to form most of the films, and because of this phenomenon, the width of the slug film formed near the center of the three sides becomes very narrow. Therefore, as shown in FIG. 6, the hole S formed by the slug having a larger diameter is formed at the center of the equilateral triangle exhaust hole 1 of the present invention.

On the other hand, the equilateral triangle exhaust hole 1 can be changed into an isosceles triangle or a right triangle, such that the physical characteristics are lower than the most reasonable reason or equilateral triangle in the art, there is no great utility value, the degree of such commercial change is in the technical scope of the present invention It is obvious to belong.

As described above, the present design has an exhaust hole arrangement configuration effect that the exhaust area ratio per unit area is smoother than that of a conventional vantilator since the spacing of the equilateral triangular exhaust holes is substantially the same, and the equilateral triangular exhaust hole Since 1 is the same length of the three sides, the three sides form a straight line, and the angle between the sides is maintained at 60 degrees, so the angle formed by the three edges when the slug is formed (attached) by the surface tension Acute angle causes capillary phenomenon, and the slugs are driven to three corners, so the affinity slugs are collected at three corners to form most of the membranes. It becomes very narrow, and in the center of equilateral triangle exhaust hole 1 more than before Since the aperture S to form a slug having a diameter forming an exhaust effect becomes excellent.

Claims (1)

In the conventional casting mold vantilator formed with an inclined surface 11 on the outer bottom edge and the exhaust hole penetrating the upper and lower surfaces in the form of a cylinder at regular intervals up, down, left and right; The vent hole is a triangular exhaust hole 1 constituting an equilateral triangle, but the vantilator for casting mold, characterized in that configured to be arranged repeatedly repeatedly shifted each other.