Space spanning pouring system for iron mold sand coating process

Abstract

The invention discloses a space spanning pouring system for an iron mold sand coating process. The pouring system comprises a sprue cup, a sprue and a bridging sprue, wherein the bridging sprue comprises semi-arch bridge channels, runners and risers, the bottom of the sprue cup is connected with the top of the sprue, the two ends of the bottom of the sprue are respectively connected with one endsof the semi-arch bridge channels, the two semi-arch bridge channels form an arch bridge channel, the other ends of the two semi-arch bridge channels are respectively connected with one ends of the runners, the two ends of each runner are respectively connected with the risers, and one side or two sides of each riser is connected with inner sprues. Molten iron is introduced into the arch bridge channel through the sprue cup and the sprue, sequentially flows through slag collection bags, filter screens, the runners and the risers, and is injected into product casting molds through the inner sprues. According to the pouring system, space placement channels of the product casting molds can be increased, so that the product casting amount produced by a single box is increased by 1.5-2 times, the production efficiency is high, the yield is high, the quality is stable, the operation is convenient, and the pouring system is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a leaping pouring system for an iron mold sand-covered process space. Background technique [0002] There are mainly two types of engine crankshaft materials commonly used, forged steel and ductile iron. [0003] Compared with the traditional forged steel crankshaft, the ductile iron crankshaft has the advantages of simple manufacture, low cost and shock absorption and wear resistance. The fatigue strength of the nodular cast iron crankshaft under torsion and bending fatigue stress can reach or even exceed that of the forged steel crankshaft through alloying, reasonable spheroidization, and inoculation treatment. [0004] Our company is currently the leader in the production of high-grade nodular cast iron crankshafts in China. Since 2000, it has produced 3 million crankshafts with the patented grade QT800-6. The weight of small crankshafts ranges from 10 to 540Kg. Diesel engin...

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Problems solved by technology

[0006] However, for the crankshafts used for new gasoline engines with small crankshaft size and weight, if the gating system design of the existing technical solution is used, the yield rate will be low and the area of ​​the iron mold will be small, which will cause the temperature of the iron mold to not reach the level during the production process. According to the process requirements, it needs to be heated separately to waste energy consumption, increase the production cycle and affect the output efficiency, etc.

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