Water jet cutters

Super-speed water-jets are further applied increasingly for the production steps requiring the cutting of pieces of material which should be kept at low temperature and which appear soft and restrictive towards mechanical tools. The water-jet as a "hydrodynamic cutter" provides a number of advantages in cases which should be selected by case studies. 

Once the slabstock has been made, the conveyor belts carry the foam to storage for 12-24 hr, to allow the materials to cool and cure. Finally, the foams are transported via conveyor belt past cutters and trimmers that cut the foam to size. High speed water jet are used to cut a variety of shapes from the flexible foam. ... 

Thermoformings are made from a solid sheet, so the spare material (offal) must be trimmed from the exterior. Holes and other openings must be machined since they cannot be formed in this process. While traditional cutting tool methods are commonplace, high-pressure water jets, hot wires, thermal laser, and robotic cutters are often used. The most recent trend has been the introduction of one or another of the automated devices as thermoformers strive to be competitive. 

Cutting of composites can be performed using knives, disc cutters, lasers and water jets. 

Kawahara [21] has discussed the characterisation and identification of spilled residual fuel oils on surface water using gas chromatography and infrared spectrophotometry. The oily material was collected by surface skimming and extraction with dichloromethane, and the extract was evaporated. Preliminary distinction between samples was made by dissolving portions of the residue in hexane or chloroform. If the residue was soluble in chloroform but not in hexane it was assumed to be crude oil, a grease, a heavy residual fuel oil or an asphalt if it was soluble in both solvents it was assumed to be very light or heavy naphtha, kerosine, gas oil, white oil, diesel oil, jet fuel, cutting oil, motor oil or cutter stock. The residue was also examined by infrared spectrophotometiy wavenumber values of use for identification purposes are tabulated. 

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