HD 200 ECOLINE CUTTING RULES (Extra/750) are fully hardened cutting rules made from quenched and subsequently drawn steel.
HD 100 (HF) ECOLINE CUTTING RULES (Flex/Flex 60) are fully hardened cutting rules with high-frequency hardened cutting edges. This design provides better bending properties than HD 200 ECOLINE cutting rules, and due to the higher hardness level of the cutting edge it offers a substantially better cutting performance.
HD 200 UND 100 (HF) CUTTING EDGE FORMS AND CUTTING EDGE FINISH
1. Cutting Edge Forms
We differentiate between four types of cutting edges: CF, SF, CFDB, SFDB
2. Cutting Edge Finish
- Standard shaved: Shaving leads to a smooth cutting edge (therefore less dust during punching). Shaved rules provide better bending properties than sharpened rules.
- Sharpened on request: Sharpened cutting edges can only be supplied with HD 100 (HF) design on request. They have shown outstanding results in punching synthetic and plastic-laminated materials. The bending properties of sharpened rules are, however, slightly worse than those of shaved lines.
3. Optimal use of various cutting edge forms (CF, SF, CFDB, SFDB)
CF: This cutting edge is most commonly used for punching standard cardboard articles. It is mainly employed either for thinner materials or if drawing-in of the edge is of no importance for the final product. The CF cutting edge is used in up to 85% in the construction of punching moulds.
CFDB: The CFDB cutting edge reduces the required cutting force during the punching of hard or thick materials (such as thick glass-fibre reinforced laminates, leather, rubber, puzzles, plastics, balsa wood, etc.) and is also used if stronger edge deformations should be prevented.
SF: The SF cutting edge is used for cutting sealings, displays and narrow contours. The punched material should have the least possible edge deformations.
SFDB: The SFDB cutting edge is used in the same way as the SF cutting edge. It is, however, also suitable for punching thicker materials.
DIFFERENCE BETWEEN HD 200 AND HD 100 (HF) ECOLINE
The decision about the quality of rule to be used (HD 200 or HD 100 HF) is made by the mould maker according to the following viewpoints:
- required bending properties
- materials to be cut (required stability of the rules)
- required amount of circulation
Concerning 1: It is well known that there are two principally different systems for dimensioning moulds:
- Rules are only inserted it is possible proceed with the maximum hardness without taking the bending properties of the rules into account
- Rules are bent in this case, it is necessary to take the required radius of bending into account and to use the respective quality of rule.
TOOL LIFE OF HD ECOLINE
The tool life of flat-bed rules depends substantially on the following factors:
- the quality of rule used
- the preciseness of the height tolerance
- the preciseness of the dressing of the tools in the punching machine
- technical condition of the punching machine
- the material to be punched