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DIE LOADS AND PRESS CAPACITY
The engineers at Value Line have performed years of testing to determine the amount of force necessary to cut or emboss
many materials.
The maximum tonnage recommended by various manufactures of cutting and creasing presses can become confusing
when a comparison of machines is made unless the basis used by each company is defined and understood.
Die Loads
Cutting and Creasing loads can be determined by testing a sample using a specially constructed laboratory press. This
test takes into consideration material grain, die construction, and stripping material load. The results can be converted to the
maximum die size allowable to stay within recommended die cutting load ratings.
Press Loads
The total load on a press is usually much greater than the theoretical die cutting load and is made up of the following:
1. Loads created by die imperfections such as:
A. Dull cutting rule
B. Cutting rule of unequal height.
C. Poor die design, specifying cutting rule of incorrect height, bevel, or thickness, or incorrect height of creasing rule,
lumber or stripping material.
2. Load created by poor makeready that is soft or excessive.
3. Load created by material variations caused by changes in moisture content, grain density or thickness.
4. Excess load created by careless impression micrometer settings.
5. Load created by a worn machine components and the natural deflection of highly stressed parts.
6. Load created during cutting and creasing of material. This is the diecutting load used as a basis for Value Line
recommendations.
The total press load will vary with the above conditions and can be up to 3 times the recommended die cutting load.
Instruction Manual - 19" x 25"
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