2, 60% of the defects in cast iron parts is directly related to modelling and formative conditions improve, puts forward new requirements for quality management, sand control is more strict.Improve the quality of management is also a important conditions for producing high quality castings, otherwise, the advanced process method can also be difficult to play their role.3, production conditions, development trend also determines the difficulty of process control, and the control than clay sand, resin sand production application of the hybrid machine tool castings, labor intensity can be reduced by 50%, stainless steel castings defects decreased from 5.4% to 5.4%, and the workshop production capacity increased by 20%.�;1, the first is about 4 � � � � uniformity, surface roughness and size ` � � � � requirements.For one-time clay sand mold 侌 � � tight strength gradually improve on behalf of the production 渨 � � improvement, � � the font > s tight � � � type machine adopts fill pressure tight pressure is 0.18 ~ 0.2 � � �, 50 s for � � nt > 0.35 ~ 70 s for � � � ~ 1.40 MPa.Tight pressure increase guarantee cast iron � � � density, dimensional stability and achieve � � L � � strict requirements of a smooth surface.
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