FRANKLIN
MANUFACTURING CORPORATION
Reprinted by AFM Engineering, Inc. -16- Phone 714.547.0194
1313 E. Borchard Ave.
Fax 714.542.2728
Santa Ana, CA 92705 Email [email protected]
Shore hardness, i.e., cellulose acetate will require about ¾ of a ton of
pressure per square inch of impression area.
The basic adjustment then to be made in this control area is the PSI
adjustment of the ram air regulator. The first step is to arrive at the total
impression area of the metal die. This may be estimated, measured
directly, or in some cases, where die detail is intricate a planimeter may
be used to measure the actual artwork. Once the square inch area is
know, the following formulas may be used to arrive at the proper PSI
adjustment of the ram regulator, when using a metal die.
Eight Ton Machine
12.5 x
Sq.
In.
=
PSI
Five Ton Machine
20
x
Sq.
In.
=
PSI
Two Ton Machine
50
x
Sq.
In.
=
PSI
One & One-Half Ton Machine
66.6 x
Sq.
In.
=
PSI
One Ton Machine
100 x
Sq.
In.
=
PSI
When a silicone rubber die is used, in order to tip the raised portions of
normal engineering materials, silicone rubber die which is normally
between 60 to 70 Shore hard will normally give before the harder plastic
material.
When using a rubber die then for tipping, the basic rule is to allow 300
PSI per square inch of stamping area in order to assure the rubber die, in
this case, will give enough to make a good thermal contact with the
lowest point in the stamping area.
Hence, once the square inch area is known, the following formulas may
be used to arrive at the proper PSI adjustment of the ram air regulator,
when using a rubber die.
