RU2192330C2 - Easy-to-remove hot top of gating system and method for removing it - Google Patents

Abstract

FIELD: foundry. SUBSTANCE: monolythic dividing plate is placed vertically in hot top. Said plate is made of wood material and it has pointed ribs. It is possible to place several plates or cross-like plate. At pouring metal to mold said plate divides hot top by portions and it burns out. In order to remove hot top, percussion load is applied to its upper part at side of flat dividing surface of plate. It simplifies removal of hot top. Additional heat separated at plate burning out provides condition for making up casting by heat. EFFECT: enhanced quality of castings, lowered labor consumption, simplified design of gating system. 3 cl, 10 dwg, 1 ex

Description

 The invention relates to foundry, mainly to aluminum and precision casting, and can be used to prevent the formation of shrinkage shells on castings and facilitate the separation of profits.

 Known easy-to-profit gating system (see B.N. Ivanov "Dictionary-reference for foundry. M. Engineering, 1990, p. 141, Fig. L-2). It contains a housing, a dividing plate of metal or core mixtures with the casting power channel in the center, mounted vertically, and the sign part.This device is the closest in technical essence to the proposed one and is selected as a prototype.

The disadvantages of the known devices include:
1. The design is not compact due to the presence of a sign part that does not allow it to be installed on castings with small power supply units.

 2. Insufficient casting quality due to the limited supply of the casting, because the metal is chilled in the central channel due to the installation of the separation plate across the supply.

 3. The complexity of the separation of profit, because the cross section of the central channel in the separation plate is solid, monolithic.

 The method of profit separation is widely known, in which the hammer is applied randomly on the upper part of the profit with a sledgehammer until profit is separated from the casting.

 The disadvantages of this method: high complexity due to the need for multiple strikes and the application of significant physical effort.

 The proposed inventions solve the problem of improving the quality of casting and reduce the complexity in its manufacture. At the same time, the following technical result is achieved: simplification of the design, which allows reducing profit margins, improving the casting supply due to additional heating and supply efficiency, and facilitating profit separation due to the separation (unit) of the power channel. To obtain such a technical result, in the proposed easily separable profit of the gating system comprising a housing and a separation plate mounted vertically, the separation plate is made of monolithic wood, while the edges of the plate are pointed. The separation plate may be made crosswise.

 Distinctive features of the proposed device is that the dividing plate is monolithic, made of wood, while the edges of the plate are pointed. The plate can be made crosswise.

 This greatly simplifies the design, because the sign part is missing; an opportunity is created to reduce profit margins; casting nutrition is improved by increasing the number of supply channels. Power channels run along the plate from 2 sides. You can install several parallel plates, then the number of power channels increases. The power of the casting is improved due to additional heating of the profit during the burning of wood, which leads to an increase in the quality of casting and a decrease in the laboriousness in making the profit itself, as well as casting.

 To achieve the named technical result, a method for separating profit is proposed, which, like the one closest to it, involves imposing an impact load on the upper part of the profit, but the blow is applied from the side of the flat surface of the separation plate.

 Distinctive features of the proposed method is that the blow is applied from the flat surface of the separation plate.

 This provides convenience and easy separation of profits due to the separation of the power channel into several parts, which leads to a decrease in the complexity of the separation of profits.

The invention is illustrated by drawings, which depict:
figure 1 - dividing plate, limited in height of profit;
figure 2 - dividing plate for the entire height of profit;
figure 3 - cross-shaped dividing plate, limited in height of profit;
figure 4 - cross-shaped dividing plate for the entire height of profit;
figure 5 is a method of separating profits from the casting.

 Profit consists (figure 5) of the housing 1, the separation plate 2, mounted vertically with pointed ribs (angle α, figures 1, 2, 3, 4 and 5). The profit is located on the casting 4. The shock load during separation of profit is applied along the upper part 6 from the side of the flat surface of the separation plate 2. The drawing shows the fault location 3 and the gap 5 between the separation plate and the casting body 4.

 Installation of the separation plate in the profit cavity is carried out along the feed of the casting by pressing in the mold into the molding mixture during molding into the ground due to the pointed edges of the plate, this operation is also facilitated by the method of jamming into the profit cavity if pouring into the chill mold, while the separation plate is installed at a distance of not less than 5 mm (plate) from the body of the casting, as shown in figure 5, position 5. This is necessary so that when removing profits not to damage the body of the casting.

 The device operates as follows. The poured metal enters the cavity of the casting and fills it. When filling the cavity of the casting 4 of Fig. 5, the liquid metal enters along the separation plate 2 into the profit cavity 1 and fills it through the channels 7. Thus, the separation plate made of wood is flooded on all sides with liquid metal, thereby dividing the profit body into parts depending on which dividing plate is installed (figures 1, 2, 3 and 4). If necessary, you can install several parallel plates (figure 1 and figure 2).

 When burning without air, the dividing plate generates additional heat, which heats the profit and creates a favorable condition for feeding the body of the casting 4. Thus, the divided profit into several parts by the dividing plate is easily separated in parts (through channels) from the body of the casting 4.

 The proposed method of profit separation is as follows.

 For quicker and easier separation of profit and maintain the quality of the casting, the impact load should be applied on the upper part of the profit from the flat surface of the separation plate.

 Example. It is required to separate the profit with the dividing plate installed in it (according to the proposed device) from the obtained casting. If you hit chaos with a sledgehammer randomly on the upper part of the profit, then to achieve the result you will need a lot of strokes and considerable physical activity.

 And according to the proposed method, if you hit from the flat surface of the dividing plate, then the profit divided by this plate can easily be separated from the casting.

 Those. reduced labor intensity and increased labor productivity.

 From the above it follows that the task of improving the quality of casting and reducing the complexity in its manufacture is solved. At the same time, the profit structure has been simplified, it has become possible to reduce its size, the casting supply has improved, and therefore, the casting quality has improved, and the profit separation has become easier.

 The proposed invention is simple, reliable, economical, suitable for widespread use in foundry.

Claims (3)

 1. Easily separable gating system profit, comprising a housing and a separation plate, characterized in that the separation plate is monolithic, made of wood and mounted vertically, while the edges of the plate are pointed.  2. Easily separable gating system profit according to claim 1, characterized in that the separation plate is made crosswise.  3. The method of separation of profit, including the imposition of a shock load on the upper part of the profit, characterized in that the blow is applied from the side of the flat surface of the separation plate.

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