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8/18/2019 174021467 Case Study Mechanics Machine
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Hoist application in engineering field
A hoist is a device used for lifting or lowering a load by means of a drum or
lift-wheel around which rope or chain wraps. It may be manually operated,
electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting
medium. The load is attached to the hoist by means of a lifting hook.
Types of hoist:
The basic hoist has two important characteristics to define it: Lifting medium and
power type. The lifting medium is either wire rope, wrapped around a drum, or load-
chain, raised by a pulley with a special profile to engage the chain. The power can
be provided by different means. ommon means are hydraulics, electrical and air
driven motors. !oth the wire rope hoist and chain hoist have been in common use
since the "#$$s. however% &ass production of an electric hoist did not start until the
early "'$$s and was first adapted by (ermany. A hoist can be built as one integral-
package unit, designed for cost-effective purchasing and moderate use, or it can be
built as a built-up custom unit, designed for durability and performance. The built-up
hoist will be much more e)pensive, but will also be easier to repair and more
durable. *ackage units were once regarded as being designed for light to moderateusage, but since the +$s this has changed. !uilt-up units are designed for heavy to
severe service, but over the years that market has decreased in sie since the
advent of the more durable packaged hoist. A machine shop or fabricating shop will
use an integral-package hoist, while a teel &ill or AA would use a built-up unit to
meet durability, performance, and repairability re/uirements. AA has also seen a
change in the use of package hoists. The AA Astronaut training pool, for e)ample,
utilies cranes with packaged hoists.
http://en.wikipedia.org/wiki/Pneumaticallyhttp://en.wikipedia.org/wiki/Pneumaticallyhttp://en.wikipedia.org/wiki/Lifting_hookhttp://en.wikipedia.org/wiki/Mass_productionhttp://en.wikipedia.org/wiki/Lifting_hookhttp://en.wikipedia.org/wiki/Mass_productionhttp://en.wikipedia.org/wiki/Pneumatically
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Wire Rope Hoist or Chain Hoist
&ore commonly used hoist in today0s worldwide market is an
electrically powered hoist. These are either the chain type or the wire rope
type.
owadays many hoists are package hoists, built as one unit in a single
housing, generally designed for ten-year life, but the life calculation is based
on an industry standard when calculating actual life. ee the 1oists
&anufacturers Institute site2"3 for true life calculation which is based on load
and hours used. In today0s modern world for the orth American market there
are a few governing bodies for the industry. The 4verhead Alliance is a group
that represents rane &anufacturers Association of America 5&AA6,
hanghai 7A!4 1oisting &achinery 58A!46, 1oist &anufacturers
Institute 51&I6, and &onorail &anufacturers Association 5&&A6. These
product counsels of the &aterial 1andling Industry of America have 9oined
forces to create promotional materials to raise the awareness of the benefits
to overhead lifting. The members of this group are marketing representatives
of the member companies.
ommon small portable hoists are of two main types, the chain
hoist or chain block and the wire rope or cable type. hain hoists may have a
lever to actuate the hoist or have a loop of operating chain that one pulls
through the block 5known traditionally as a chain fall6 which then activates the
block to take up the main lifting chain.
http://en.wikipedia.org/wiki/Hoist_(device)#cite_note-1http://en.wikipedia.org/wiki/Crane_Manufacturers_Association_of_Americahttp://en.wikipedia.org/wiki/Hoist_(device)#cite_note-1http://en.wikipedia.org/wiki/Crane_Manufacturers_Association_of_America
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A hand powered hoist with a ratchet wheel is known as a ratchet lever
hoist or, collo/uially, a come-along. The original hoist of this type was
developed by Abraham &aasdam of ;eep reek, olorado about "'"', and
later commercialied by his son,
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hain hoist also describes a hoist using a differential pulley system,
in which a compound pulley with two different radii and teeth engage an
endless chain, allowing the e)erted force to be multiplied according to the
ratio of the radii.
• onstruction hoists
Also known as a &an-Lift, !uckhoist, temporary elevator, builder hoist,
passenger hoist or construction elevator, this type of hoist is commonly used on
large scale construction pro9ects, such as high-rise buildings or ma9or
hospitals. There are many other uses for the construction elevator. &any other
industries use the buckhoist for full-time operations, the purpose being to carry
personnel, materials, and e/uipment /uickly between the ground and higher floors,
or between floors in the middle of a structure. There are three types: Btility to move
material, personnel to move personnel, and dual-rated, which can do both.2=3
http://en.wikipedia.org/wiki/Differential_pulleyhttp://en.wikipedia.org/wiki/Hoist_(device)#cite_note-4http://en.wikipedia.org/wiki/Differential_pulleyhttp://en.wikipedia.org/wiki/Hoist_(device)#cite_note-4
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The construction hoist is made up of either one or two cars 5cages6 which
travel vertically along stacked mast tower sections. The mast sections are attached
to the structure or building every C? feet 5D.+C m6 for added stability.
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8ibration is occasionally desirable.
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Pendulum
A pendulum is a weight suspended from a pivot so that it can swing freely.2"3 7hen a
pendulum is displaced sideways from its restinge/uilibrium position, it is sub9ect to
a restoring force due to gravity that will accelerate it back toward the e/uilibrium
position. 7hen released, the restoring force combined with the pendulum0s mass
causes it to oscillate about the e/uilibrium position, swinging back and forth. The
time for one complete cycle, a left swing and a right swing, is called the period. A
pendulum swings with a specific period which depends 5mainly6 on its length.
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lock pendulums
*endulum and anchor escapement from agrandfather clock
*endulums in clocks 5see e)ample at right6 are usually made of a weight
or bob (b) suspended by a rod of wood or metal (a).To reduce air resistance 5which
accounts for most of the energy loss in clocks6 the bob is traditionally a smooth disk
with a lens-shaped cross section, although in anti/ue clocks it often had carvings or
decorations specific to the type of clock. In /uality clocks the bob is made as heavy
as the suspension can support and the movement can drive, since this improves the
regulation of the clock 5see Accuracy below6. A common weight for seconds
pendulum bobs is "? pounds. 5+.# kg6. Instead of hanging from a pivot, clock
pendulums are usually supported by a short straight spring (d) of fle)ible metal
ribbon. This avoids the friction and 0play0 caused by a pivot, and the slight bending
force of the spring merely adds to the pendulum0s restoring force. A few precision
clocks have pivots of 0knife0 blades resting on agate plates. The impulses to keep the
pendulum swinging are provided by an arm hanging behind the pendulum called
http://en.wikipedia.org/wiki/Anchor_escapementhttp://en.wikipedia.org/wiki/Anchor_escapementhttp://en.wikipedia.org/wiki/Grandfather_clockhttp://en.wikipedia.org/wiki/Bob_(physics)http://en.wikipedia.org/wiki/Air_resistancehttp://en.wikipedia.org/wiki/Pendulum#Accuracy_of_pendulums_as_timekeepershttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wiktionary.org/wiki/pivothttp://en.wikipedia.org/wiki/Spring_(device)http://en.wikipedia.org/wiki/Restoring_forcehttp://en.wikipedia.org/wiki/Anchor_escapementhttp://en.wikipedia.org/wiki/Grandfather_clockhttp://en.wikipedia.org/wiki/Bob_(physics)http://en.wikipedia.org/wiki/Air_resistancehttp://en.wikipedia.org/wiki/Pendulum#Accuracy_of_pendulums_as_timekeepershttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wiktionary.org/wiki/pivothttp://en.wikipedia.org/wiki/Spring_(device)http://en.wikipedia.org/wiki/Restoring_force
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the crutch, (e), which ends in a fork , (f) whose prongs embrace the pendulum rod.
The crutch is pushed back and forth by the clock0s escapement, (g,h).
Each time the pendulum swings through its centre position, it releases one tooth of
the escape wheel (g). The force of the clock0s mainspring or a driving weight hanging
from a pulley, transmitted through the clock0s gear train, causes the wheel to turn,
and a tooth presses against one of the pallets (h), giving the pendulum a short push.
The clock0s wheels, geared to the escape wheel, move forward a fi)ed amount with
each pendulum swing, advancing the clock0s hands at a steady rate.
The pendulum always has a means of ad9usting the period, usually by an ad9ustment
nut (c) under the bob which moves it up or down on the rod. &oving the bob updecreases the pendulum0s length, causing the pendulum to swing faster and the
clock to gain time. ome precision clocks have a small au)iliary ad9ustment weight
on a threaded shaft on the bob, to allow finer ad9ustment. ome tower clocks and
precision clocks use a tray attached near to the midpoint of the pendulum rod, to
which small weights can be added or removed. This effectively shifts the centre of
oscillation and allows the rate to be ad9usted without stopping the clock.
The pendulum must be suspended from a rigid support. ;uring operation, any
elasticity will allow tiny imperceptible swaying motions of the support, which disturbs
the clock0s period, resulting in error. *endulum clocks should be attached firmly to a
sturdy wall.
The most common pendulum length in /uality clocks, which is always used
in grandfather clocks, is the seconds pendulum, about " metre 5>' inches6 long.
In mantel clocks, half-second pendulums, C? cm 5"$ in6 long, or shorter, are used.4nly a few large tower clocks use longer pendulums, the ".? second pendulum,
C.C? m 5D ft6 long, or occasionally the two-second pendulum, = m 5"> ft6 as is the
case of !ig !en.
Temperature compensation
The largest source of error in early pendulums was slight changes in length due to
thermal e)pansion and contraction of the pendulum rod with changes in ambient
http://en.wikipedia.org/wiki/Escapementhttp://en.wikipedia.org/wiki/Mainspringhttp://en.wikipedia.org/wiki/Wheel_train_(horology)http://en.wikipedia.org/wiki/Turret_clockhttp://en.wikipedia.org/wiki/Grandfather_clockhttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wikipedia.org/wiki/Mantel_clockhttp://en.wikipedia.org/wiki/Turret_clockhttp://en.wikipedia.org/wiki/Big_Benhttp://en.wikipedia.org/wiki/Escapementhttp://en.wikipedia.org/wiki/Mainspringhttp://en.wikipedia.org/wiki/Wheel_train_(horology)http://en.wikipedia.org/wiki/Turret_clockhttp://en.wikipedia.org/wiki/Grandfather_clockhttp://en.wikipedia.org/wiki/Seconds_pendulumhttp://en.wikipedia.org/wiki/Mantel_clockhttp://en.wikipedia.org/wiki/Turret_clockhttp://en.wikipedia.org/wiki/Big_Ben
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temperature.2D'3 This was discovered when people noticed that pendulum clocks ran
slower in summer, by as much as a minute per week 2?+32#$3 5one of the first
was (odefroy 7endelin, as reported by 1uygens in "+?#6. 2#"3 Thermal e)pansion of
pendulum rods was first studied by Gean *icard in "++'.2#C3 A pendulum with a steel
rod will e)pand by about "".> parts per million 5ppm6 with each degree elsius
increase, causing it to lose about $.CD seconds per day for every degree elsius
increase in temperature, or ' seconds per day for a >> H 5+$ H> H 5+$ H
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container these two effects will cancel, leaving the pendulum0s centre of mass, and
its period, unchanged with temperature. Its main disadvantage was that when the
temperature changed, the rod would come to the new temperature /uickly but the
mass of mercury might take a day or two to reach the new temperature, causing the
rate to deviate during that time.To improve thermal accommodation several thin
containers were often used, made of metal. &ercury pendulums were the standard
used in precision regulator clocks into the C$th century.
Gridiron pendulum
Main article: Gridiron pendulum
The most widely used compensated pendulum was the gridiron pendulum, invented
in "DC+ by Gohn 1arrison.2#32#$32#>3 This consists of alternating rods of two different
metals, one with lower thermal e)pansion 5TE6, steel, and one with higher thermal
e)pansion, inc or brass. The rods are connected by a frame, as shown in the
drawing above, so that an increase in length of the inc rods pushes the bob up,
shortening the pendulum. 7ith a temperature increase, the low e)pansion steel rods
make the pendulum longer, while the high e)pansion inc rods make it shorter. !y
making the rods of the correct lengths, the greater e)pansion of the inc cancels outthe e)pansion of the steel rods which have a greater combined length, and the
pendulum stays the same length with temperature.
inc-steel gridiron pendulums are made with ? rods, but the thermal e)pansion of
brass is closer to steel, so brass-steel gridirons usually re/uire ' rods. (ridiron
pendulums ad9ust to temperature changes faster than mercury pendulums, but
scientists found that friction of the rods sliding in their holes in the frame caused
gridiron pendulums to ad9ust in a series of tiny 9umps. In high precision clocks this
caused the clock0s rate to change suddenly with each 9ump. Later it was found that
inc is sub9ect to creep.
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Invar and fused quartz
Around "'$$ low thermal e)pansion materials were developed which, when used as
pendulum rods, made elaborate temperature compensation unnecessary. These
were only used in a few of the highest precision clocks before the pendulum became
obsolete as a time standard. In "#'+ harles Edouard (uillaume invented
the nickel steel alloy Invar . This has a TE of around $.? Jin5inKH seconds per day, and this
residual error could be compensated to ero with a few centimeters of aluminium
under the pendulum bob 5this can be seen in the @iefler clock image above6. Invar
pendulums were first used in "#'# in the @iefler regulator clock which achieved
accuracy of "? milliseconds per day. uspension springs of Elinvar were used to
eliminate temperature variation of the spring0s restoring force on the pendulum.
Later fused /uart was used which had even lower TE. These materials are the
choice for modern high accuracy pendulums.
Atmospheric pressure
The effect of the surrounding air on a moving pendulum is comple) and re/uires fluid
mechanics to calculate precisely, but for most purposes its influence on the period
can be accounted for by three effects:
• !y Archimedes0 principle the effective weight of the bob is reduced by the
buoyancy of the air it displaces, while the mass 5inertia6 remains the same,
reducing the pendulum0s acceleration during its swing and increasing the period.
This depends on the air pressure and the density of the pendulum, but not its
shape.
• The pendulum carries an amount of air with it as it swings, and the mass of
this air increases the inertia of the pendulum, again reducing the acceleration
and increasing the period. This depends on both its density and shape.
• 8iscous air resistance slows the pendulum0s velocity. This has a negligible
effect on the period, but dissipates energy, reducing the amplitude. This reduces
http://en.wikipedia.org/wiki/Charles_Edouard_Guillaumehttp://en.wikipedia.org/wiki/Nickelhttp://en.wikipedia.org/wiki/Steelhttp://en.wikipedia.org/wiki/Alloyhttp://en.wikipedia.org/wiki/Invarhttp://en.wikipedia.org/wiki/Coefficient_of_thermal_expansionhttp://en.wikipedia.org/wiki/Riefler_escapementhttp://en.wikipedia.org/wiki/Elinvarhttp://en.wikipedia.org/wiki/Restoring_forcehttp://en.wikipedia.org/wiki/Fused_quartzhttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Archimedes'_principlehttp://en.wikipedia.org/wiki/Weighthttp://en.wikipedia.org/wiki/Bob_(physics)http://en.wikipedia.org/wiki/Masshttp://en.wikipedia.org/wiki/Inertiahttp://en.wikipedia.org/wiki/Air_resistancehttp://en.wikipedia.org/wiki/Charles_Edouard_Guillaumehttp://en.wikipedia.org/wiki/Nickelhttp://en.wikipedia.org/wiki/Steelhttp://en.wikipedia.org/wiki/Alloyhttp://en.wikipedia.org/wiki/Invarhttp://en.wikipedia.org/wiki/Coefficient_of_thermal_expansionhttp://en.wikipedia.org/wiki/Riefler_escapementhttp://en.wikipedia.org/wiki/Elinvarhttp://en.wikipedia.org/wiki/Restoring_forcehttp://en.wikipedia.org/wiki/Fused_quartzhttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Fluid_mechanicshttp://en.wikipedia.org/wiki/Archimedes'_principlehttp://en.wikipedia.org/wiki/Weighthttp://en.wikipedia.org/wiki/Bob_(physics)http://en.wikipedia.org/wiki/Masshttp://en.wikipedia.org/wiki/Inertiahttp://en.wikipedia.org/wiki/Air_resistance
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the pendulum0s factor , re/uiring a stronger drive force from the clock0s
mechanism to keep it moving, which causes increased disturbance to the period.
o increases in barometric pressure increase a pendulum0s period slightly due to the
first two effects, by about $."" seconds per day per kilopascal 5$.>D seconds per day
per inch of mercury or $.$"? seconds per day per torr 6. @esearchers using
pendulums to measure the acceleration of gravity had to correct the period for the air
pressure at the altitude of measurement, computing the e/uivalent period of a
pendulum swinging in vacuum. A pendulum clock was first operated in a constant-
pressure tank by
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Friction application in mechanical component
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and
material elements sliding against each other. There are several types of friction:
• Dry friction resists relative lateral motion of two solid surfaces in contact. ;ry
friction is subdivided into static friction 5stiction6 between non-moving surfaces,
and kinetic friction between moving surfaces.
• Fluid friction describes the friction between layers within a viscous fluid that
are moving relative to each other.
• ubricated friction is a case of fluid friction where a fluid separates two solid
surfaces.
http://en.wikipedia.org/wiki/Forcehttp://en.wikipedia.org/wiki/Surfacehttp://en.wikipedia.org/wiki/Stictionhttp://en.wikipedia.org/wiki/Viscoushttp://en.wikipedia.org/wiki/Forcehttp://en.wikipedia.org/wiki/Surfacehttp://en.wikipedia.org/wiki/Stictionhttp://en.wikipedia.org/wiki/Viscous
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• S!in friction is a component of drag, the force resisting the motion of a fluid
across the surface of a body.
• "nternal friction is the force resisting motion between the elements making
up a solid material while it undergoes deformation.
7hen surfaces in contact move relative to each other, the friction between the two
surfaces converts kinetic energy into heat. This property can have dramatic
conse/uences, as illustrated by the use of friction created by rubbing pieces of wood
together to start a fire. Ninetic energy is converted to heat whenever motion with
friction occurs, for e)ample when a viscous fluid is stirred. Another important
conse/uence of many types of friction can be wear , which may lead to performance
degradation andor damage to components.
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&easurement
• A tribometer is an instrument that measures friction on a surface.
• A profilograph is a device used to measure pavement surface roughness.
1ousehold usage
•
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simple drilling processes to more comple) applications such as welding or punching,
!alance Engineering stands ready to help solve your balancing needs with any
number of standard and customied solutions.
Drilling $pplications
This method of balancing customer-specific parts utilies a drilling process to remove
metal for part correction. This process can be accomplished in a vertical or horiontal
attitude, and use any number of dfferent drill types and diameters. The appropriate
configuration will depend on specific part and production process re/uirements.
Typical parts utiliing this process include crankshafts, engine dampers, and other
rotating members with sufficient metal thickness to allow drilling without
compromising component integrity.
A newer technology used with great success on many of our machines is &inimum
uantity Lubrication 50&L06 drilling. @ather than pumping large /uantities of coolant
onto the part as necessary during a normal drilling operation, the &L method forces
small /uantities of coolant through the drilling tool and directly into the drill hole
during correction. This method allows faster drill speeds, resulting in shorter cycle
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times and enhanced formation and e)traction of drilling chips. The overall drilling
process is much cleaner. &L has become the preferred method employed by
!alance Engineering on our machines using drilling correction.
%rinding $pplications
(rinding is another commonly used method for balancing parts and assemblies. This
involves abrasive removal of material from specific areas on the part. This process
can be employed in either a vertical or horiontal attitude and use any number of
different grinding tooling, depending on the part configuration and correction
re/uirements. Typical parts utiliing grinding correction include flywheels, stators and
brake discs.
&illing $pplications
This method of balancing customer-specific parts utilies a milling process to remove
metal for part correction. &illing is generally employed for part configurations that do
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not lend themselves to any other metal removal correction process. Typical parts
using this process include brake rotors, brake drums and stator assemblies, among
others.
'ibbling ( 'otching $pplications
This method of balancing customer-specific parts utilies a metal removal process
known as nibbling or notching. This involves using specialied tooling to shear small
sections of material from the part edge surface at calculated vectors to achieve
specified balance. ormally accomplished in a horiontal attitude, nibblingnotching
removes metal from the outside diameter of any given rotor in any number of
heights, widths or depths. Typical parts utiliing this correction process include
various transmission components such as hubs or housings.
Piercing ( Punching $pplications
This method of balancing customer-specific parts utilies a metal removal process
known as piercing or punching. This involves using specialied tooling to remove
small sections of material from the part surface at pre-calculated vectors to achievespecified balance. *iercing or punching can be accomplished in either a horiontal or
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vertical attitude, employing any number of tooling shapes and sies to e)tract
material from a given part. Typical parts utiliing this correction process
include thinner metal components such as flywheels, hubs or housings.
Welding $pplications
This method of balancing customer-specific parts utilies a metal addition process
known as welding. This involves using specialied tooling for attaching pre-cut or
variable length metal weights onto the part surface at pre-calculated vectors to
achieve specified balance. 7eld correction can be accomplished in several different
ways, including pro9ection and spot welding. Typical parts utiliing this correction
process include tor/ue converters, turbine assemblies, a)ledifferential
assemblies and driveshafts, among others.
Current technology applied in belting system
teel belts are top of the milk for Tetra *ak
http://www.belttechnologies.com/steel-belts-are-top-of-the-milk-for-tetra-pak/http://www.belttechnologies.com/steel-belts-are-top-of-the-milk-for-tetra-pak/
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Tetra *ak has recently launched the Tetra Evero Aseptic oneFlitre F the first aseptic
carton bottle for milk.
The new carton combines the easy handling and pouring of a bottle with the
environmental and cost advantages of a carton. It is initially being aimed at the
ambient white milk market, including non-o)ygen sensitive enriched products,
including flavored milk and cream.
Bnlike traditional carton materials, which are aseptically sterilied before they are
formed into shape, the Tetro Evero Aseptic is pre-formed and not flat-packed,
meaning it re/uires an alternative approach.
The ma9ority of e)isting technologies for steriliing performed shapes rely on a gas-
condensation process. This process involves the gas condensing on the material
surface, but this is known to be comple) and difficult to control.
The Tetra Evero Aseptic, however, uses a new gas-phase steriliation techni/ue
which involves the cartons passing through a uni/ue aseptic chamber in pairs where
they are e)posed to hydrogen pero)ide. The gas comes into contact with the whole
preformed package F inside and out, removing any contaminants that might have
been present before entering the aseptic chamber.
The cartons travel on steel belts during this production process. The use of steel
belts is a highly hygienic alternative to using traditional plastic and ! conveyor
systems. "voiding the spread of contaminants is imperative in belt technology: steel
belts are far easier to clean than their plastic counterparts and do not need to be
lubricated in order to transmit power. This is important because germs and
potentially harmful bacteria are attracted to dust generated by lubricant grease,
which can potentially contaminate food or other products.
teel belts are not 9ust available as flat conveyors, they can be customied in many
ways and offer novel and e)citing solutions to a variety of complicated conveying
problems. !elts can be perforated with comple) patterns for timing, vacuum or
dosing applications.
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Together, the steel belt technology and the new gas-phase steriliation techni/ue
used in the production of the new Tetra Evero Aseptic have resulted in a highly
effective means of commercial sterility F an innovative development which should
now set the gold standard for the production of aseptic packaging across Europe and
the rest of the world.
Stainless Steel #elts Shine in Solar Cell $pplications
!elt Technologies, a leading provider of metal belt and conveyor systems, provides
photovoltaic manufacturers a more efficient means of producing solar cells that use
the sunOs energy to generate electricity. As the world makes significant moves
towards sustainability, manufacturers are continually searching for more efficientways to produce products that take advantage of renewable energy sources.
!elt TechnologiesO steel belts have provided manufacturers a more effective solution
for transporting components through the cell manufacturing process as well as final
panel assembly. Bsed in tabber and stringer operations, the belts provide many
benefits not found in alternative belting materials. The beltsO robust nature allows
them to be perforated and sustain accuracy in high-speed vacuum systems. As a
result, cells can be moved precisely to the re/uired welding spot to achieve
accuracies of ."mm or less in both the lateral and horiontal planes. Additionally,
stainless steel belts from !elt Technologies are able to resist the high temperatures
involved in laser soldering bus ribbons during the solar panel assembly process,
avoiding the /uality-threatening belt degradation commonly seen with plastic and
fabric belts. Their longevity under intense heat provides cost savings to
manufacturers as a result of fewer belt changes and reduced down time. Abrasion-
resistant release coatings prevent solder buildup and provide protection for the
various flu)es commonly used in the manufacturing process.
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Perforated Steel #elts "mprove )fficiency in #lood Filter Production
!elt Technologies has developed a perforated stainless steel belt that has
significantly improved production efficiency for a leading manufacturer of advanced
technologies in the separation of li/uids, solids, and gases. The belt, used to
transport pre-coated blood filter elements through a forced hot air drying chamber,
has streamlined the production process and helped *orous &edia orporation of t.
*aul, & achieve machine efficiencies in the '+-'#M range.
The beltOs large perforations allow for the ma)imum amount of airflow through anupper and lower belt, resulting in complete drying of the li/uid coating solution. Its
seamless non-stretch surface eliminates the threat of particulate debris being
introduced into the manufacturing environment, while allowing for a complete Pclean
and placeQ process, which cannot be done effectively with other belting materials. A
cycled belt cleaning operation can be performed simultaneously with the production
of the filters, eliminating the need for stoppages and resulting in machine efficiencies
in the upper '$M range. The productOs non-stretch properties result in better
positioning and increased accuracy.
http://www.belttechnologies.com/perforated-steel-belts-improve-efficiency-in-blood-filter-production/http://www.belttechnologies.com/perforated-steel-belts-improve-efficiency-in-blood-filter-production/
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"ndependent Pulley System Steers Flat #elts for *n+the+fly $d,ustments
!elt Technologies has developed a simple and effective pulley system for
independently steering flat belts while allowing for easy on-the-fly tracking
ad9ustments. The patented system provides a solution to tracking problems
encountered as a result of operating environment changes and also eliminates
downtime by allowing independent belt ad9ustments on a multi-pulley common shaft.
teering is accomplished by ad9usting the angle of the pulley relative to the belt and
modifying lateral tension. @ather than moving the pulley shaft through the use of
pillow block ad9ustments, the I* design fits a variable steering collar 5with either a
skewed or offset bore6 and a sealed bearing assembly to the body of the pulley.
7hen rotated, the collar changes the angle of the pulley body, resulting in the
controlled bi-directional movement of the belt across the pulley face.
http://www.belttechnologies.com/independent-pulley-system-steers-flat-belts-for-on-the-fly-adjustments/http://www.belttechnologies.com/independent-pulley-system-steers-flat-belts-for-on-the-fly-adjustments/
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'e- Stainless Steel Tapes Drive Robotic $rms
!elt Technologies has introduced a new high-performance line of stainless steel
drive tapes used in con9unction with A@A robots in atmospheric and vacuumwafer transport applications. The tapes provide significant advantages over
alternative drive methods including reduced vibration, improved accuracy, and a
cleaner manufacturing environment. @einforced with standard or custom end tabs,
!elt Technologies drive tapes are easy to install.
The low-mass, low-stretch properties of these tapes result in precision tolerances
with no outgassing and low hysteresis. mooth surfaces provide for a much cleaner
manufacturing environment by eliminating the particulate debris that is a common bi-
product of traditional systems. ;esigned to minimie vibration, these stainless steel
drive tapes allow for rapid acceleration, improved positioning accuracy, and high
levels of repeatability% resulting in better performance with increased throughput. !elt
Technologies stainless steel drive tapes can be customied for specific applications
in the nano-technology, solar and fuel cell, data storage, opto-electronics, L;LE;,
pharmaceutical, and biotech industries.
http://www.belttechnologies.com/new-stainless-steel-tapes-drive-robotic-arms/http://www.belttechnologies.com/new-stainless-steel-tapes-drive-robotic-arms/
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