Casting of metals
a metal and casting technology, applied in the field of sand casting of metals, can solve the problems of many production related problems, and achieve the effect of reducing residual stresses and potential cracking of casting
Inactive Publication Date: 2006-12-07
EQUIP MERCHANTS INT
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Benefits of technology
"The invention provides a segmented die assembly for casting metal objects, which includes chill segments to maintain contact with the molten metal during solidification. The die segments are movable to ensure the chill is in contact with the casting surface as it solidifies. The assembly has a central chill segment and an outer die segment, which are interconnected and movable by an actuator. The chills are cooled using oil, water, or air. Each actuator is controlled by a Fuzzy logic module, which controls the actuators independently based on inputs from devices measuring casting solidification parameters. The technical effect of this invention is to improve the quality and efficiency of metal casting by controlling the solidification process in real-time, resulting in better quality castings and reduced production costs."
Problems solved by technology
While chilling processes have been used in the area of the bulkheads of the cylinder block, they have caused many production related problems in existing facilities using moulds made from sand.
Method used
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[0019] In the following description the invention is described as casting a cylinder block 1 of an internal combustion engine, but it is to be realized by a person skilled in the relevant art however, that the invention can be applied to the casting of any article whether it is cast in aluminium or another metal.
[0020] The figures show a design for a segmented die assembly having an interconnected chill segment 2 and outer segment 4 on each side of the cylinder block 1. The chill segment 2 and outer segment 4 are interconnected by a coupling 6, the coupling ensures that the chill returns with the outer segment when it is retracted by the actuator (not shown). The coupling comprises a ‘T’ shaped projection stemming from the chill segment 2, the head 8 of the coupling being received in a recess in the outer segment that is shaped and adapted to receive the male portion of the coupling. This assembly produces the bulkhead section of the cylinder block, and can form a part of the clamp...
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Abstract
A segmented die assembly for the casting of a metal object, the die assembly incorporating chill segments that are cooled using oil and / or water and / or air, the segments being interconnected and moved by actuators under the control of a Fuzzy logic module, wherein in use the assembly ensures that the chill maintains contact with the surface of the casting as it solidifies.
Description
TECHNICAL FIELD [0001] This invention relates to the sand casting of metals, particularly aluminium and more particularly to the casting of aluminium products requiring desired mechanical properties. [0002] This is particularly so in the casting of aluminium cylinder blocks for automotive engines. Recent developments in aluminium cylinder block design have resulted in a requirement for high mechanical properties in the bulkhead sections of the casting. The rapid cooling of a casting results in increased hardness and other properties in the casting, or selected areas of the casting. The rapid cooling can be achieved by oil and / or water and / or air-cooling of the mould, particularly in the use of metal moulds. However in sand cast moulds, the cooling can be achieved by a metal insert or chill in the mould, the chill having the capacity of conducting the heat into itself, thus cooling the molten metal and solidifying the casting. BACKGROUND ART [0003] While chilling processes have been ...
Claims
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IPC IPC(8): B22D15/00B22D15/04
CPCB22D15/04
Inventor BEND, ROBERTJ
Owner EQUIP MERCHANTS INT