LENGTHS OF DRAWING FRAMES, 16-IN. GAUGE.
[Ill.u.s.tration]
Above lengths are over all, including Driving Pulley.
For widths, see Floor Plans, pages 88 and 89
Drawing Frames are usually made with 4, 5 or 6 deliveries per head or table, and 2, 3 or 4 heads per frame, but can be made with more or less deliveries per head, and more or less heads per frame.
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DRAWING FRAMES.
PRODUCTION PER DAY OF TEN HOURS.
[Ill.u.s.tration]
NOTE--In the above table 20 per cent. has been deducted for stops, cleaning, etc.
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[Ill.u.s.tration]
DRAFT GEARING FOR DRAWING FRAMES
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DRAWING FRAMES.
ALPHABETICAL REFERENCES TO DIAGRAM.
A Electric Roll Gear, 24 Teeth for Common Rolls, 20 Teeth for Metallic Rolls.
B Off End Back Roll Gear. 24 Teeth for Common Rolls, 29 Teeth for Metallic Rolls.
*C Small Double Intermediate, driving 3d Roll.
D Large Double Intermediate, driving 3d Roll, 40 Teeth for Common Rolls, 36 Teeth for Metallic Rolls.
E Off End 3d Roll Gear, 24 Teeth.
*F Off End 2d Roll Gear.
*G Small Double Intermediate, driving 2d Roll.
*H Large Double Intermediate, driving 2d Roll.
I Off End Front Roll Gear, 20 Teeth.
J Back Roll Gear, 45 to 80 Teeth.
K Draft Change Gear, 45 to 70 Teeth.
*L Crown Gear.
*M Front Roll Gear.
N Front Roll Calender Driving Gear, 16 Teeth for Common Rolls, 19 Teeth for Metallic Rolls.
O and P Double Intermediate Gear, 52 and 91 Teeth for 10-in. Coiler, 62 and 108 Teeth for 12-in. Coiler.
Q Calender Roll Gear, 58, 59, 60 Teeth for Common Rolls, 52, 53, 54 Teeth for Metallic Rolls.
R Coiler Horizontal Shaft Gear, 21 to 26 Teeth (driven by O through Carrier Gear).
S Tube Wheel, 75 Teeth for 10-in. Coiler, 98 Teeth for 122 in. Coiler.
T Coiler Vertical Shaft, Top Bevel Gear, 32 Teeth for 10 in.
Coiler, 37 Teeth for 12-in. Coiler.
NOTE--For teeth on gears marked * refer to table on page 96.
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DRAWING FRAMES.
DRAFT CALCULATIONS.
[Ill.u.s.tration]
The above figures are for Total Draft up to and including the 3-in.
dia. Calender Rolls. When Graduated Pitch Metallic Rolls are used, and it is desired to figure drafts between them, the following equivalents are approximately correct:
1-3/8-in. dia. Roll, 32 pitch, taken as 11/6-in. or 1.83-in. dia.
1-1/4-in. dia. Roll, 32 pitch, taken as 10/6-in. or 1.67-in. dia.
1-1/8-in. dia. Roll, 32 pitch, taken as 9/6-in. or 1.50-in. dia.
1-in. dia. Roll, 32 pitch, taken as 8/6-in. or 1.33-in. dia.
1-1/8-in. dia. Roll, 16 pitch, taken as 10/6-in. or 1. 67-in. dia.
1-in dia. Roll, 16 pitch, taken as 9/6-in. or 1.50-in. dia.
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PRODUCTION CALCULATIONS
[Ill.u.s.tration]
The greater production with Metallic Rolls over Common Rolls for a given number of revs. is due to the meshing of the flutes, which increases the effective circ.u.m. of the rolls about 33 per cent. This accounts for the difference in the gears driving the Calender Rolls.
Short rules for production in 10 hours based on 20 per cent. allowance for stops, etc., and 1-3/8 in. dia. front bottom roll.
Common Rolls--.852 x R. P. M. of Front Roll x Wt. of Sliver in grains = Lbs. in 10 hours.
Metallic Rolls--1.126 x R. P. M. of Front Roll x Wt. of Sliver in grains = Lbs. in 10 hours.
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DRAWING FRAMES.
GEARING COMBINATIONS, DRAFT CONSTANTS AND DRAFTS FOR MACHINES WITH 1-3/8-IN. FRONT ROLL.
[Ill.u.s.tration]
The above constant and drafts are figured up to and including the 3-in. Calender Rolls. Draft Gear K is the usual change gear.
When making extreme draft changes the best results will be obtained by following the above arrangements of gearing.
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