Combined lost foam casting system

Abstract

A combined lost foam casting system comprises a top face open-hole cross-gate sand core, universal cross-gate sand cores and a cross-gate end sand core. A hole in the top face open-hole cross-gate sand core is connected with a sprue. The sprue is connected with a sprue cup. Refractory bricks are laid on the top face open-hole cross-gate sand core. The universal cross-gate sand cores are connectedwith ingates through filter net seats. Lost foams are connected with the filter net seats through ingates. The combined lost foam casting system has the beneficial effects that the casting and mold filling speed of the lost foams is high and stable, many ingate inlet flow points exit, the molten iron flowing speed of flow gates is low, and the return and choke of the casting molten iron are prevented.

Description

technical field [0001] The invention relates to a mechanical casting equipment, in particular to a combined lost foam pouring system. Background technique [0002] In the existing technology, there are usually two types of gating systems for lost foam casting in the production process of lost foam casting: 1. The gating system uses lost foam to form runners and inner runners, and then uses ceramic tubes or paper tubes for casting as sprues ; 2. Use ceramic tubes or paper tubes for casting to overlap each other to form the inner runner, and then connect the inner runner and the straight runner through the corresponding reducing pipe; the first gating system in the above two forms of gating system is easy to be affected by the casting Due to the impact of the structure, the filling of the casting is not stable, resulting in slag inclusion defects in the casting, and the sprue is directly connected to the runner of the lost foam runner. Choking, endangering the personal safety...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, there are usually two types of gating systems for lost foam casting in the production process of lost foam casting: 1. The gating system uses lost foam to form runners and inner runners, and then uses ceramic tubes or paper tubes for casting as sprues ; 2. Use ceramic tubes or paper tubes for casting to overlap each other to form the inner runner, and then connect the inner runner and the straight runner through the corresponding reducing pipe; the first gating system in the above two forms of gating system is easy to be affected by the casting Due to the impact of the structure, the filling of the casting is not stable, resulting in slag inclusion defects in the casting, and the sprue is directly connected to the runner of the lost foam runner. Choking, endangering the personal safety of pouring personnel; the above-mentioned second gating system, the sprue is directly connected to the inrunner, there is no steady flow of the runner, the flow of molten iron in the ingate is fast, and the filling is not stable, resulting in slag inclusion defects in castings , and this gating system overlap is complex and the production efficiency is low

The existing pouring system has a slow re-starting speed. In order to ensure the rapid gasification of the lost foam, the pouring temperature must be increased, resulting in a waste of energy, and it is easy to cause sand sticking defects in castings.

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