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Sediver Catalog 1970
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§lvpt ·46 ·74 ·102 ·131
·18 §horn §brit ·103 ·132
·19 ·48 ·76 ·104 §d.c.
·20 ·49 ·77 ·105 ·134
·21 ·50 ·78 ·106 ·135
·22 ·51 ·79 §a'fog ·136
·23 ·52 ·80 ·108 ·pack
§hvpt §flash §u.s. ·109 ·comp
·26 ·54 ·82 ·110 ·139
·27 ·55 ·83 ·111 §index
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§fit §int'l ·87 ·115
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list of Captions

Manufacture Phases

A - Preparation and mixing of the raw materials.
B - Stocking of the mixed raw materials.
C - Loading into the furnace.
D - Melting and homogeneization of the molten mass.
E - First cooling of the molten mass.
F - Second cooling, conditioning of the molten mass, and formation of gobs.
G - Moulding of the glass bodies.
H - Homogeneization of the temperature of the glass bodies before toughening.
I - Toughening of the glass bodies.
K - Cooling of the glass bodies.
L - Cold to hot thermal shock.
M - Cooling of the glass bodies.
N - Homogeneization of the temperature of the glass bodies.
O - Hot to cold thermal shock.
P - Stocking.

Controls

I - Physical and chemical checking of the raw materials.
II - Furnace controls: temperature, pressure, glass level in the furnace, viscosity, temperature and oil flow, chemical analysis of the combustion gases, and so on.
III - Temperature control of the molten mass in the feeder.
IV - Chemical and physical controls of glass.
V - Visual checking at random.
VI - Statistical checking of dimensions.
VII - Unitary checking to destroy the bodies including a speck.
VIII - Unitary checking to destroy badly quenched bodies.
IX - Visual unitary controls to reveal flaws of the glass bodies.

The curve situated in the lower part of the figure shows the variations of temperature of the raw materials of glass, and of the glass bodies, during the whole manufacturing process.