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Trowel: the Moulder's Trowel Forged from Flat Steel (Modern Shop Practice, 1916)
A trowel with a wide thin steel blade and a short stem cranked up at a right angle to a round handle. Modern Shop Practice (1916) forges it from steel about 1/4 inch by 1 inch: nick it with fullers, draw down the stem, bend it up to a square corner, then thin the blade edge by edge so a small ridge stays where the stem joins (Fig. 121, R).
The foundry uses it to shape and smooth the larger surfaces of a mould; the bottom is ground slightly crowning so the forward edge does not cut into the sand. Blade size, steel grade and the handle are not given.
Source: Modern Shop Practice, vol. 4 (American Technical Society, 1916), Forging p. 65 and Foundry Work pp. 14-15. Picture: Figs. 121-122.
Katamtaman
An hour
Mga Tagubilin
1
1
Read the source
Read the source
"The molder's trowel illustrated in Fig. 121 is a sample of a large class of forgings, having a wide thin face with a comparatively small thin stem forged at one end. The stock used for the trowel would be about 1/4 inch by 1 inch. This is thick enough to allow for the formation of a ridge at R."
2
2
Nick and draw the stem
Nick and draw the stem
Heat the 1/4 × 1 inch steel. Make two nicks across it with fullers near one end (Fig. 122, A) and draw that end down, roughly to size, into the stem.
Mga materyales para sa hakbang na ito:
Hilaw na baras na asero1 barMga kailangang kasangkapan:
Pandayan
Palihan
Martilyo ng panday
Sipit ng panday
Fuller (bakal na panguka)
Guwantes na Matibay sa Init3
3
Bend the square corner
Bend the square corner
Bend the stem up at a right angle and forge it to a square corner (Fig. 122, B), the same way as the square corner of a bracket.
Mga kailangang kasangkapan:
PandayanPalihanMartilyo ng pandaySipit ng pandayGuwantes na Matibay sa Init4
4
Flatten the blade
Flatten the blade
Hold the work with the stem pointing down against the side of the anvil (Fig. 122, C). Strike down so the blows cover the part over the edge of the anvil: all the metal on the anvil is flattened. Swing the piece round to thin the other edge. The small triangle left unworked forms the ridge R. The same result comes from laying the work flat on the anvil face and using a set hammer. Blade width and length are not given (unknown).
Mga kailangang kasangkapan:
PandayanPalihanMartilyo ng pandaySipit ng panday
Set hammer ng panday
Hindi alam na sukatGuwantes na Matibay sa Init5
5
Grind the bottom and fit the handle
Grind the bottom and fit the handle
Grind the bottom of the blade slightly crowning, so it can be rocked a little as it is worked over the sand without the forward edge cutting in. Fit a short round handle that fits the grasp of the hand (Fig. 10); the source does not say what it is made of or how it is fixed to the stem.
Mga materyales para sa hakbang na ito:
Hawakan ng Kasangkapan1 pirasoMga kailangang kasangkapan:
Gulong na panggiling6
6
History and honest limits
History and honest limits
The book counts sixty or more trowel and slick shapes on the market; the square trowel works into square corners, the finishing trowels cope out along curved pattern edges. Trowels are sold by width and length of blade.
Not given: blade size, steel grade, handle material and fixing, any hardening. Steel Bar Stock stands for the plain "steel" of the source.
Mga Materyales
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- 1 pirasoPlaceholder
Mga Kinakailangang Kasangkapan
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