Abstract: A mixing and adjusting method for foundry sand includes calculating a total supplied water amount until a compactability (CB) value of mixed sand becomes larger than a lower limit value of a target CB value range, determining the total supplied water amount as a predetermined amount of water associated with an electric resistance of the foundry sand, and determining a ratio of a variation in the CB value corresponding to an additionally supplied water amount from the additionally supplied water amount during an additional water pouring and the CB value of the mixed sand.

Abstract: Provided is a mixing and adjusting method for foundry sand that uses a sand muller, having weight measuring means for measuring a weight of the foundry sand to be mixed, water content measuring means for measuring a water content of the foundry sand to be mixed, water pouring means for pouring water into the foundry sand, and CB value measuring means for measuring a CB value of the foundry sand during mixing.

Abstract: A robot holds an untreated coarse aluminum casting that is located at a predetermined carrying-in corner with the holding means and carries it to the first machining unit. At the first unit it holds a treated casting treated by the first unit with the holding device as well as transferring the untreated casting from the holding device to the first unit. Then it carries the treated casting that has been treated by the first unit to a second machining unit. At the second unit it holds a second treated casting that has been treated by the second unit with the holding device as well as transferring the treated casting treated by the first unit from the holding device to the second unit. Then it carries the second treated casting treated by the second unit to a predetermined carrying-out corner.

Abstract: This invention resolves the problem in which a robot of the existing method cannot efficiently carry coarse aluminum castings to a first and a second machining unit. A robot holds an untreated coarse aluminum casting that is located at a predetermined carrying-in corner with the holding means and carries it to the first machining unit. Then, at the first machining unit it holds the treated coarse aluminum casting that has been treated by the first machining unit with the holding means as well as transferring the untreated coarse aluminum casting from the holding means to the first machining unit. Then it carries the treated coarse aluminum casting that has been treated by the first machining unit to the second machining unit.