Cutting rubber / cutting rubber seals
Cutting rubber seals / The CNC milling machine used as a cutting plotter
With our optional tangential knife EOT-3, all CNC machines offered by us can also be used as a cutting plotter. The tangential knife module turns the CNC machine into a full-fledged flatbed tangential cutting plotter with which you can, for example, easily and precisely cut hard rubber, cork and other materials.
The CNC machine is designed for single-part as well as for series production in shift operation. In the future, you will be able to cut your workpieces easily and quickly using the tangential knife module and the High-Z / T CNC router, which can not be milled due to the nature of the material (too soft).
Cutting rubber isn’t that easy
Due to the extreme toughness of rubber, cutting results in extremely high friction between the knives used and the material itself. This leads to a great deal of heat which in the worst case causes the melting of the rubber to be cut. Here, it must be ensured that the feed rate of the blade is exactly matched to the material to be cut.
In our experiment, we cut a 5mm thick rubber seal from a 70 shore hard hard rubber. This is followed by further rubber cutting tests. You are welcome to send us your material and we will test for you if we can realize your requirement with our CNC machines.
Information about the Shore hardness of elastomers
The most commonly used hardness test for determining the Shore hardness of elastomers is the test method according to standard DIN ISO 7619-1. Shore hardness is understood to mean the resistance of a rubber to the penetration of a conical body with a defined shape and dimension under a defined compressive force.
The measuring bodies are designed differently and one differentiates according to Shore A for soft elastomer mixtures and for the harder elastomers Shore D. For the exact determination of Shore hardness the DIN standard 7619-1 stipulates a material thickness of 6 mm for the sample fix.
For technical molded parts / molded rubber parts, the hardness ranges from about 20-90 Shore A.