Core-blowing machine using the hot box process - for high speed automatic prodn. of sand cores

摘要

Core-blowing machine uses a frame contg. three stations. In station (I), a sand hopper mounted on an overhead carrier is used for the reciprocation of a sand box from its location under the hopper to station (II). In station (II)b, the sand box is located above a core box trolley mounted over a press table; and the trolley can be reciprocated between station (II) and (III). Station (III) is a core ejector station, provided wtih a hoist for the upper core box half. The sand box is pref. fitted with air inlets and outlets, whereas station (III) has a removable ejector plate on which ejector pegs are mounted; both the upper and lower core box halves can be removed. In station (I) is another trolley fitted with a plate driven vertically upwards and on which pins are mounted; the pins are used to clean the sand blowing holes in the sand box when the latter is in station (I). The device is used for prodn. of cores for high speed mass prodn. The core box halves can be rapidly replaced so idle time is very short and output can be increased.