KR-102962766-B1 - Precision pressurized casting system

Abstract

The present invention relates to a precision pressure casting system comprising: a melting furnace formed in a cylindrical shape to melt metal and produce molten metal; and a molten metal tank for storing the molten metal.

Inventors

• 정산권

Assignees

• 정화금속공업(주)

Dates

Publication Date

20260511

Application Date

20250704

Claims (2)

1. A melting furnace formed in a cylindrical shape to melt metal and produce molten metal, and a melting tank in which the molten metal is stored; A mold installed on the upper part of the above molten metal tank; An injection pipe for transferring molten metal from the above molten metal tank to the above mold; A pressurizing pipe installed on one side of the above-mentioned molten metal tank to supply air or gas into the interior to pressurize; and A pressure control unit installed on one side of the above-mentioned pressure pipe to control the pressure by adjusting the amount of air or gas supplied; The above molten metal tank is, It is characterized by having tank legs for supporting the floor at the bottom; and It further includes a tank leg support member that can be fitted onto the tank leg for the secure fixation and stability of the tank leg. The above tank leg support is, A first fixing part having an open upper side so that a first tank leg can be inserted and seated; A second fixing part having an open upper side so that a second tank leg can be inserted and seated; A third fixing part having an open upper side so that a third tank leg can be inserted and seated; A fourth fixing part having an open upper side so that the fourth tank leg can be inserted and seated; A first support member installed between a first fixed part and a second fixed part to support the gap between the first fixed part and the second fixed part; A second support member installed between the third fixed part and the fourth fixed part to support the gap between the third fixed part and the fourth fixed part; A third support member installed between the first fixed part and the third fixed part to support the gap between the first fixed part and the third fixed part; and A fourth support member installed between the second fixed part and the fourth fixed part to support the gap between the second fixed part and the fourth fixed part; including The above-mentioned first support member is, A connecting part that supports the gap between a first fixed part and a second fixed part with elastic force, formed of an elastic material, having a shear contraction part installed at the front end and a rear contraction part installed at the rear end; A shear contraction part installed at the front end of the above-mentioned connecting part, which connects the front end of the connecting part to the first fixing part while simultaneously contracting the front end of the connecting part to increase the tension of the connecting part; A rear end contraction part installed at the rear end of the above-mentioned connecting part, facing the front end contraction part, and connecting the rear end of the connecting part to the second fixing part while simultaneously contracting the rear end of the connecting part to increase the tension of the connecting part; An installation member included in the shear contraction portion above, fixedly installed on one side of the first fixing portion above, and configured to allow a pull bolt to pass through and be seated therein; An insertion groove extending from the front end of the above-mentioned connecting part along the inner side of the connecting part, with a tension adjustment part disposed on the inner side; A tension adjustment part installed on the inner side of the insertion groove and having threads formed on its inner surface so as to be able to engage with the threads of a pull bolt; and a tension bolt that is fastened to the tension adjustment part with the head seated on the installation member, and moves the tension adjustment part according to rotation to contract the length of the connection part; The above shear contraction member is characterized by further including a strength adjusting member, wherein one end is installed on the inner surface of the first fixing member and the other end is extended toward the installation member and inserted along the inner side of the connecting member, and wherein the fastening strength of the tank leg coupled to the first fixing member is adjusted according to the movement of the tension adjusting member. Precision pressure casting system.
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Description

Precision pressurized casting system The present invention relates to a precision pressure casting system. Generally, a low-pressure casting device is a device that produces an object made of the molten material and having a shape corresponding to the mold by injecting a molten material (i.e., molten substance), such as metal or plastic, into a mold formed in the shape of the object to be cast at low pressure, and then cooling and solidifying it for a certain period of time. Meanwhile, a conventional low-pressure casting device includes a mold disposed inside a casing, a low-pressure casting tank disposed below the mold and storing molten material inside, a supply pipe connecting the mold and the low-pressure casting tank, and a pressure device for injecting a high-pressure gas, such as air or nitrogen, into the low-pressure casting tank. Therefore, by operating the pressure device to inject high-pressure gas, the inside of the low-pressure casting tank is made into a high-pressure environment, causing the molten material stored in the low-pressure casting tank to rise through the supply pipe and fill the inside of the mold with molten material. Then, by waiting for a certain period of time while continuously operating the pressure device to prevent the molten material filled in the mold from being discharged again through the supply pipe, the molten material filled in the mold cools and solidifies, allowing the casting of the target object. However, the low-pressure casting device according to the prior art described above has a structure in which the mold is sealed, so even when the molten material is not fully filled inside the mold, the pressure inside the mold becomes equal to the pressure of the pressure device (14), and the molten material does not rise any further. In order to prevent this, the pressure must be finely and precisely controlled, which has the problem that it is difficult to control the pressure. In addition, shrinkage occurs when the molten material cools and solidifies, and this characteristic is particularly severe when the molten material is a metallic material. Since a cavity corresponding to the volume of shrinkage is formed, pressure must be continuously applied with a pressure device to fill in the area whenever shrinkage occurs. Consequently, there was a problem in that the molding characteristics deteriorated, such as the formation of layers in the casting as solidification and molten material injection were repeated. In addition, there was a problem in that the development time was prolonged because a significant amount of time and effort was required to find the optimal pressure value to prevent this. In addition, as described above, there was a problem in that the pressure device had to be continuously operated until solidification occurred while the mold was filled with molten material, and productivity decreased as the cooling time of the molten material was prolonged under high pressure. Furthermore, in the case of thick-walled products, when shrinkage occurs at the top of the product, the further the distance from the supply pipe, the less the molten metal inside the product can compensate for the shrinkage that occurs during solidification; thus, there was a problem in that defects could not be controlled, especially in products with complex thickness differences. FIG. 1 is a drawing showing a precision pressure casting system according to one embodiment of the present invention. FIGS. 2 and FIGS. 3 are drawings showing a tank leg support portion of a precision pressure casting system according to one embodiment of the present invention. The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. Furthermore, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, including all equivalents thereof, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects. Meanwhile, throughout this specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components bu