Pouring gate system with sump-insert

IPC classes for russian patent Pouring gate system with sump-insert (RU 2557037):

B22C9/08 - Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates

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FIELD: metallurgy.

SUBSTANCE: pouring gate system contains pouring basin, riser, sump, slug catcher with feeders, throttle and sump-insert. The sump-insert is made out of rods and is arranged under vertical riser in bottom half-mould. The sump-insert gas U shape and contains central and side parts. In the central part of the sump-insert the sump is made, at both sides of the sump on here internal surfaces of the sump-insert two throttles are installed. The throttles have shape of triangular prisms and act as stress concentrators. Side parts of the sump-insert are part of the slug catcher. The vertical riser is located at centre of the mould above the slug catcher located at both sides of the vertical riser symmetrically to its axis.

EFFECT: easy separation of the pouring gate system to parts on the knockout grate.

1 dwg

The present invention relates to foundry, namely to devices for supplying molten metal, and can be used in the manufacture of Gating systems with a sump-insert.

Closest to the claimed invention is a Gating-feeding system consisting of a sprue Cup, vertical riser, tlacolula located in a horizontal plane, feeders, side pouring profits, the upper drain profits, throttle, sump and Vipera (Sharifijanov F. S. and Mamleev R. F. Design of castings. Training manual. Ufa, Ufa state aviation technical University, 2002, 205 p. with ill., Fig.3.6, pp. 125-126).

The disadvantages of the known Gating-feeding system are:

- insufficient quality of the castings;

- the complexity of the separation of Gating-feeding system parts on the knockout grid.

The claimed technical solution aimed at improving the quality of castings and the expansion of technological capabilities by facilitating the separation of the Gating system parts on the knockout grid.

The technical result is achieved in that in the Gating system, sprue Cup, vertical riser, placed underneath the sump, horizontally positioned in the lower mold part, secolonial with perpendicular astray from it Pete�fir and choke, vertical riser is placed in the center of form over lakoololielal located on both sides of the vertical riser symmetrically to its axis, under the vertical riser in the lower mold part is placed is made of core sand sump-insert, having a U-shape and consisting of a Central and lateral parts, while in the Central part of the sump-inserts made the sump, and on both sides of the sump in the three internal surfaces of the sump-the inserts are placed two chokes that have the shape of triangular prisms, and serves as a hub voltage side of the sump-inserts are part of tlacolula.

Fig.1 shows the Gating system with the sump-insert General view.

Gating system contains secolonial 1, a horizontally positioned in the lower mold part 2. In the center of form over lakoololielal 1 symmetrically to its axis is vertical riser 3 with the sprue Cup 4. Under the vertical riser 3 in the lower mold part 2 is posted the sump insert. On both sides of the vertical riser 3 perpendicular to tlacolulita 1 allotted feeders.

Gating bowl 4 is a funnel and is used to receive from the bucket of a jet of molten metal.

Vertical riser 3 is a vertical cylindrical channel from which the metal is supplied to other gate elements�howl of the system.

Secolonial 1 is a trapezoidal channel, a horizontally positioned in the lower mold part 2. Feeders are a channel for supplying molten metal directly into the mold cavity.

The sump insert is U-shaped and comprises a Central part 5 and side portions 6.

In the Central part of the sump 5-panels are made sump, representing a deepening of the vertical riser 3. The sump is designed to mitigate scour effects on the shape of a falling stream of liquid metal in the beginning of filling of the vertical riser 3.

On both sides of the sump in the three internal surfaces of the sump-insert (sidewalls and bottom) are two of the inductor 7 having the form of triangular prisms. The inductors 7 are local narrowing, made for the purpose of "locking" of vertical riser 3 and thereby maintain it in a filled condition with the die casting, and also for keeping a certain level of alloy in the casting bowl 4.

Thus, the presence of chokes 7 reduces the probability of such defects on the castings, slag contamination, as slag inclusions do not get to form and accumulate on the surface of the alloy in the casting bowl 4.

Simultaneously with the function to control the consumption of the alloy in the form (retaining the design head in a vertical riser 3) chokes 7 �apolnet function of stress concentrators, as a zone of deformation and fracture. This allows Gating system, passing after crystallization by stamped-out grille, guaranteed to split into three parts.

The side parts 6 of the sump-inserts are part of tlacolula 1 placed in the lower mold part 2 on both sides of the vertical riser 3 is symmetrical to its axis.

The sump insert is made of core mixture which has higher strength characteristics than the moldable mixture, which made other parts of the Gating system. This allows you to use the sump-box to avoid erosion of the mold surface in the area of the sump and chokes 7, reducing the probability of occurrence of such defects on the castings, as earthy blockage and sandy shell.

Gating system with a sump and pasting works as follows.

Alloy from the casting ladle is poured into the casting Cup 4, then through a vertical riser 3 alloy enters the Central portion of the sump 5 is inserted. Passing through the choke 7, the level of the alloy is increased by reducing the flow section in the area of the choke 7. Then the alloy fills the remaining elements of the Gating system and mold cavity. After filling all the cavity of the alloy crystallization process proceeds. After crystallization produced knockout of castings from the Gating system on vibin�th lattice. Passing through the knockout lattice, Gating system, collapsing in the area of stress concentrators sump-insert, is divided at least into three parts - riser with a bowl, the left branch of the Gating system, the right branch of the Gating system. The separation of the Gating system reduces the weight of the falling parts of, softening the force of impact with the passage in the knockout stages of the lattice, which in turn provides a reduction of such defects of castings, cupping, cleavage and nick.

Thus, the Gating system with the sump-insert creates optimal conditions to obtain high-quality castings.

The use of the claimed technical solution allows you to:

1. To improve the quality of castings by reducing the probability of occurrence of the following defects:

- slag blockage - due to the presence of chokes that would guarantee to hold a certain level of alloy in the casting of the bowl, resulting in slag inclusions do not get to form and accumulate on the surface of the alloy in the mold Cup;

- excavation contamination and sandy shell - by eliminating erosion of the mold surface in the area of the sump and reactors, due to the fact that the sump insert is made of a core mixture having higher strength characteristics than the moldable mixture, which made other parts of the Gating system;

KOR�consumption, chip and nick - at the expense of guaranteed separation of Gating system, which entails a reduction of the mass falling on the knockout grille parts of the Gating system and softens the force of impact while passing through the knockout grid.

2. To expand the technological capabilities by facilitating the separation of the elements of the Gating system into parts while passing through the knockout grid, thanks to the presence of inductors that simultaneously function as stress concentrators.

Gating system, sprue Cup, vertical riser, a sump, a horizontally positioned in the lower mold part, secolonial with feeders and throttle, characterized in that it is provided with a rod made of a mixture of the sump-insert, is placed under the vertical riser in the lower mold part having a U-shaped form and consists of the Central and lateral parts, wherein the sump is made in the Central part of the sump-boxes, and on both sides of the sump in the three internal surfaces of the sump-inserts made chokes in the form of triangular prisms, performing the function of stress raisers, and the side portion of the sump-inserts are parts of tlacolula, with a vertical riser in the center of the form, and secolonial located on both sides of the vertical strut is symmetrical relative to its axis.