Generally, the diaphragm made of plastic or rubber is a very important part in a vacuum pump. Because its diaphragm must form a closed space between the internal and external cavity of the pump to complete the efficient pumping process, and the edge of the diaphragm must be It is very flat and actinic, and can not be rough or uneven. The laser cutting process cannot meet the cutting requirements of these materials, which affects the cutting quality. It can also provide high-quality trimming, improve the quality of the product, and reduce some edge damage that may be caused by mechanically cutting the diaphragm.
The cutting diaphragm of the laser cutting machine can provide good cutting edge quality, and at the same time, it can reduce some damage caused by mechanical cutting and reduce the risk of cutting.
For this application, a small centrally mounted hole was cut out of a 1mm (0.039 ") thick diaphragm made of layered neoprene and polytetrafluoroethylene (Teflon?). The diameter is generally 22.9mm (0.9 ").
The cutting process uses a Synrad 80W laser mounted on the XY stage, equipped with a cutting head with a 2.5 "focal length lens, which can provide a focused spot of 0.1mm (0.004"). And use CDA (clean and dry air) As an auxiliary gas, it is sprayed through a 0.9mm (0.0345 ") wide nozzle at a flow rate of 100 PSI per second to reduce the harm of the melt to the lens. In this way, we can complete the cutting speed at 74mm / s (175inches / min) The required cutting work. The resulting cutting edge is very smooth and has a small amount of melting. Generally, the 0.9 "diameter center hole on the diaphragm is cut with a 80W power and 74 mm / s (175 IPM) laser.