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.