Quality Waterjet Newsletter – 06/05/2007
Tailoring
with High Pressure Waterjets Cutting fabrics with waterjets
presents some obvious advantages over metal cutters. Metal cutters wear out
while waterjets are always sharp. Metal cutters need to be orientated to the
tangent of the contour, but waterjets need not. Waterjets have a narrow kerf
and can cut complex contours with sharp turns. Its heatless characteristic
also lends itself to cutting high strength textile like synthetic fibre. A
research study by Luo* provided some technical data for tailoring with
waterjets. A waterjet tailoring machine
requires a multifunctional vacuum table to support, draw, fix, and compress
the multilayer textile materials. A Nylon-fur type of vacuum table is good in
avoiding wetting the fabrics, but it is expensive. A grid-box type table is
less expensive but tends to wet the fabrics. One solution to prevent the
wetting is to use mylar film as the top and bottom layers. Because of the low
cutting force of waterjets, the machine can be constructed as light as
possible and still has sufficient precision. The cutting is best with the
highest operating pressure that the pump will allow. The nozzle size is
between 0.15 and 0.35 mm. Larger nozzles can cut faster but also have a
higher chance of wetting the materials. Typical feedrates are showed in the
table below.
Waterjet tailoring is specially useful in cutting leather, felt, and high
strength chemical fibre materials, but not so good for cutting wool and silk
materials because the edge of the bottom layer tends to get wet. The cut edge
is precise and clean, free of remaining links. Compared to traditional
mechanical tailoring machines (GGT), the productivity of waterjet tailoring
is lower (1-2 m/min vs 3-4 m/min), but with less auxiliary time. The
equipment cost and operational cost are also lower. These two technologies
complement, but not replace, each other. * Luo, X.
(1996) Study of tailoring with high-pressure waterjet, in Colin Gee (ed.)
Proceedings of the 13th International Conference on Jetting
Technology, Sardinia, Italy, October 29-31, pp 643-648. l
Fredrick Equipment, a recognized distributor of
high pressure piping components, is proud to offer QualJet/OHP’s line of
waterjet pumps and OEM replacement parts along with sapphire and diamond
orifice replacements, tools, gauges, and accessories. Call toll-free at 1-888-928-3758. |
|
QualJet
LLC
Quality Waterjet Spare Parts Specialist · Quality
Waterjet Spare Parts o Meets/exceeds
OEM standards o 30%
longer operation life time than competing products · Extensive
Parts Coverage for: o Flow
style, IR Style o 40K/55K
pumps o Intensifiers
o On/off
valves o Cutting
head o Swivels · OEM
Expert o 20+
year waterjet OEM experience (via OH Precision) o Accept
small OEM order Durable, Compact 40K
PSI Pumps
· Long
operation lifetime · Highly
cost-effective · Light
weight and compact · Contact
us for o
Custom power end o
50K psi models o
Private labeling o
Custom design QualJet LLC
1-866-QUALJET (782-5538) Fax: 425-378-7776 Email: info@qualjet.com Website: www.qualjet.com To unsubscribe the
newsletter: unsubscribe@qualjet.com For newsletter archive: www.qualjet.com/Newsletter.htm
Copyright ©2005, QualJet LLC |
||||||||||||||||||||||||||||||||
|
|