Laser cutting vacuum pump diaphragm solution
|Plastic or rubber diaphragms are a very important component in vacuum pumps. Because the diaphragm must form a closed seal between the inner and outer chambers of the pump, an efficient pumping process is completed. The edge of the diaphragm must be flattened and not rough or uneven.|
The use of CNC laser cutting machine cutting process can meet the requirements of these materials applications, can provide high quality trimming, improve product consistency, and reduce the edge damage caused by mechanical cutting diaphragm.
Cutting the diaphragm with a laser cutter provides good trim quality while reducing the risk of damage from mechanical cutting.
For this application, it is required in practice to cut a central mounting hole on a 1 mm (0.039″) thick diaphragm made of layered neoprene and polytetrafluoroethylene (Teflon®). 22.9mm (0.9″).
The cutting process uses a laser with a 2.5″ focal length lens that provides a 0.1 mm (0.004″) focused spot. CDA (clean and dry air) is used as an auxiliary gas, which is sprayed through a 0.9mm (0.0345″) wide nozzle at a flow rate of 100 PSI to reduce the damage of the melt to the lens. This can be 74mm/s (175inches/min). The cutting speed is completed by cutting. The resulting cut edge is smooth and the amount of melting is small.
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