A shorter course in woodworking; a practical manual for home and school . Fig. 476 Fig. 477 A warped board can often be straightened by heating or wetting (orboth) one side. Experiment will fix this in the mind best. These methodswork quicker with thin wood than with thick, but do not feel sure thatthe result will be lasting. A board can be soaked or pressed into shape operations in Shaping, Fitting, and Finishing 167 between clamps or under a weight, and left until thoroughly dry. It isoften well to bend a piece more than required, to allow for the tendencyto spring back when released. Laying
A shorter course in woodworking; a practical manual for home and school . Fig. 476 Fig. 477 A warped board can often be straightened by heating or wetting (orboth) one side. Experiment will fix this in the mind best. These methodswork quicker with thin wood than with thick, but do not feel sure thatthe result will be lasting. A board can be soaked or pressed into shape operations in Shaping, Fitting, and Finishing 167 between clamps or under a weight, and left until thoroughly dry. It isoften well to bend a piece more than required, to allow for the tendencyto spring back when released. Laying a board on a fiat surface will oftencause it to warp (thin wood quicker than thick), because the two sides are. Fig. 478 unequally exposed to the atmosphere. Planing off one side only, or planingone side more than the other, often produces the same effect. 133. Panelling and Door-making.—To prevent bad results fromswelling, shrinking, and warping of wide sur-faces, the work may be framed in panels. Thethin panel, fitting in the groove of the frame(Fig. 479), swells and shrinks, and often tendsto warp and twist, but can not exert forceenough to change the shape of the thick should fit closely in the groove, but beloose enough to slide in and out as it swellsand shrinks. It should not extend to thebottom of the groove, but have room forexpansion in width (Fig. 479, showing sectionon line AB). In nice work rub wax or tallow around the wrong edge of the panel before gluing the frame lest pjg_ .yg the panel become stuck. If it fits too tightly or becomes stuck it may buckle or split, or the frame be split or forced apartat the joints. If the door or surface to be panelled is too large for
Size: 2958px × 845px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorklondongpput
