. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fio. 3.—Section of Machine for Non plastic Material. is a pan roller mill, in which a pan containing the rawmaterial is driven round under rollers ; there are perfora-tions in the bottom, through which the ground clay escapes,and is swept by arms into a general receiver, whence aband with buckets conveys it to the hopper of tbp mould-ing and pressing machines C, of which fig. 4 gives anotherview. Here the moulds are contained in a box at B, boltedbetween the standards. There are two sets of pistons,one a
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fio. 3.—Section of Machine for Non plastic Material. is a pan roller mill, in which a pan containing the rawmaterial is driven round under rollers ; there are perfora-tions in the bottom, through which the ground clay escapes,and is swept by arms into a general receiver, whence aband with buckets conveys it to the hopper of tbp mould-ing and pressing machines C, of which fig. 4 gives anotherview. Here the moulds are contained in a box at B, boltedbetween the standards. There are two sets of pistons,one above and the other below the brick-moulds, andthey simultaneously press the top and the bottom of the. -Part of Machine shovm in section in fig. 3. shaft. These pistons are hollow, and are heated by steamto prevent the brick-earth adhering to them. The preparedmaterial is supplied to the two moulds by a feed-box whichslides to and fro under the feeding hopper of the machine. BRICK 283 and thus passes altornatoly under it and over the moulds,conveying sufficient each timo to fill the latter. Thobricks are delivered from tho moulds by tho lovror pistons,which are forced upwards by the complete revolution ofthe cams, and the newly-made bricks are forthwith movedforward by the approach of the feed-box with a freshcharge of the material. In another dry-clay machine con-structed by Messrs Bradley and Craven of Wakefield, two orthree distinct pressures can be given to a brick, and by thismeans the air is gradually forced out from the interstices,and tho brick consolidated to a greater extent than can beeffected by a single pressure. The varieties of brickmaking machinery are too numer-ous to
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
