CN2587549Y - Pouring system of vertical mode-division casting production line for shoe brack casting piece of car - Google Patents

Abstract

The utility model proposes a two-position segmental pouring system for automobile brake shoe castings on a vertical split casting production line, including a sprue cup, a sprue, a runner, and an inner runner; one of the inner runners is It is arranged at the middle and upper part of the brake shoe cavity, and is connected with the sprue through the runner and the feeding bag, and the other inner runner is arranged at the middle and lower part of the brake shoe cavity, and is connected with the sprue through the runner. The structure is further optimized by setting a riser on the top of the cavity. The above gating system, compared with the existing gating system, removes the inner runner at the upper end, which simplifies the structure of the gating system; adopts the above gating system, reduces the shrinkage cavity and air hole defects of the automobile brake shoe casting, and the automobile brake The scrap rate of shoe castings has decreased by 20%-25%, so that the casting cost of brake shoe castings has dropped by 5%-8%.

Description

The gating system of automobile brake shoe castings on the vertical split casting production line

Technical field: The utility model relates to a pouring system for automobile brake shoe castings on a vertical split casting production line.

Background technology: Automobile brake shoes are the key safety parts of automobile brakes, and the mechanical properties, metallographic structure, and chemical composition of the castings have strict requirements. At present, the pouring system of automobile brake shoe castings on the vertical split casting production line is a three-position segmented pouring system, including sprue cups, sprues, runners, and corresponding to the upper end of the brake shoe cavity, The middle part and the lower part are respectively provided with ingates, and the runner pressure head corresponding to the upper ingate is lower than that of the upper ingate, and the middle ingate is connected with the sprue through the runner and the shrinking bag; when pouring molten iron , when the sprue cup is full, water enters the three ingates at the same time, and the molten iron easily forms a turbulent flow in the cavity, and the molten iron entering from the upper ingate flows downward, preventing the gas from being discharged upward, and the gas pressure rises The height prevents the filling of the lower cavity, and it is easy to form dense air holes in the upper and middle parts. As a result, there are defects such as shrinkage cavities and air holes in the formed automobile brake shoe castings, and the scrap rate of brake shoe castings is as high as 25%-32%. .

Technical content: In order to reduce the shrinkage cavity and air hole defects of automobile brake shoe castings and reduce the reject rate of automobile brake shoe castings, the utility model proposes a pouring system for automobile brake shoe castings on a vertical split casting production line. The gating system is a two-position segmented gating system, including sprue cups, sprues, runners, and inner runners; one of the inner runners is set in the upper part of the brake shoe cavity, through the runners, feeding The bag is connected with the sprue, and the other ingate is set in the middle and lower part of the brake shoe cavity, and is connected with the sprue through the runner. Compared with the existing pouring system, the above pouring system removes the upper ingate and simplifies the structure of the pouring system; when the above pouring system is combined with conventional process conditions and process structures for pouring and filling, the molten iron in the cavity The turbulent flow in the interior is reduced, the gas can be smoothly removed from the cavity, the mechanism of shrinkage cavity and pore formation is reduced, the shrinkage cavity and pore defects of automobile brake shoe castings are reduced, and the scrap rate of automobile brake shoe castings is reduced. 20% -25%, thus reducing the casting cost of brake shoe castings by 5% -8%.

BRIEF DESCRIPTION OF THE DRAWINGS: Figure 1 is a schematic structural view of the utility model.

Specific implementation: as shown in Figure 1, the brake shoe cavity 9 is vertically arranged, the sprue 2 is directly connected to the sprue cup 1, and the inner runner 6 is arranged in the middle of the brake shoe cavity 9, through horizontal pouring Road 5 and feeding bag 4 are connected with sprue 1; another ingate 7 is arranged at the lower part of brake shoe cavity 9, and is connected with sprue 2 through runner 3; at the end of sprue 2 A buffer vortex 8 is provided at the lower end; an air outlet riser 10 is arranged on the top of the brake shoe cavity 9 .

In the pouring system of the above structure, an air outlet riser 10 is arranged on the top of the cavity 9, through the function of the air outlet riser 10, the shrinkage cavity and air hole defects of the brake shoe casting are further reduced.

Claims (2)

1, the pouring system of a kind of motor vehicle brake shoe foundry goods on the vertical-parting foundry production line, be two segmented pouring systems, comprise pouring cup, sprue, cross gate, ingate, it is characterized in that: one of them ingate is arranged on brake shoe die cavity middle and upper part, links to each other with sprue by cross gate, shrink bob; Another ingate is arranged on brake shoe die cavity middle and lower part, links to each other with sprue by cross gate.

2, the pouring system of motor vehicle brake shoe foundry goods according to claim 1 on the vertical-parting foundry production line, it is characterized in that: the top at described brake shoe die cavity is provided with rising head.

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