Ushirikiano
SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Clamping Caul: Plain Pine Board Shaped to the Work (Adamson, 1889)
A caul is a board laid over glued work so the clamps press evenly over the whole surface instead of only under their jaws. D. Adamson (1889) uses a piece of good sound pine about 1 in. thick, shaped exactly to fit the surface: flat for a flat panel, convex for a concave one.
For veneering he warms it first. Wood can warp or twist, and burns if overheated; a zinc-faced caul (separate blueprint) lasts longer.
Source: D. Adamson, "Practical Veneering", Work, 5 October 1889, pp. 453-455.
Mwanzo
Unknown
Maagizo
1
1
Read Adamson
Read Adamson
"The caul itself is either wood or metal, either of which must be shaped exactly to fit the surface to be veneered. Thus for a flat panel it must be flat, while for a concave surface it must be convex, and so on. ... For the material nothing is more suitable than good sound pine."
2
2
Cut the board
Cut the board
Cut a piece of good sound pine about 1 in. thick, large enough to cover the whole surface to be pressed. Thicker is no better, only waste. The length and width are set by the work (not given).
Vifaa kwa hatua hii:
Ubao wa msonobari1 about 1 in. thickZana zinazohitajika:
Msumeno wa useremala
Vipimo visivyojulikana3
3
Shape it to the work
Shape it to the work
Plane the face that meets the work to fit it exactly: flat for a flat panel, convex for a concave surface. A caul that is hollow in the middle presses only at the edges. How it is trued is not given (ours: plane, checked with a straightedge).
Zana zinazohitajika:
Randa ya mkono
Rula ya kunyoosha4
4
Use it
Use it
Warm the caul (not so hot that it cannot be comfortably handled), lay it over the veneer with a sheet of slightly greased paper between, and screw down the hand-screws evenly until the glue oozes out at the edges. Leave it until the caul is cold, an hour or two.
Zana zinazohitajika:
VibanoVifaa
1- 1 about 1 in. thickKishikilia Nafasi
Zana Zinazohitajika
5- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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