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Conveyors

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A roller track for a storage rack or roller conveyor, comprising a wall ... Oven - Pre-heat, baking, drying, flash off and curing. ... – PowerPoint PPT presentation

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Title: Conveyors


1
Conveyors
  • By
  • Scott Wood
  • Ryan Huff
  • October 31, 2007

2
  • Introduction
  • Definition
  • As an engineer, consider
  • Types(400)
  • (Applications/capabilities/programming/etc)
  • Costs
  • Applications
  • Example/Problem
  • Summary
  • References

3
Introduction
  • Conveyor- a mechanized device used to move
    materials in relatively large quantities between
    specific locations over a fixed path. (Dr. Red)
  • There are over 400 types of conveyors we are only
    going to discuss 7 of the most common conveyors
    that can relate to all others.

4
As an engineer consider
  • Different types of conveyors
  • Different applications
  • Different limits

5
Roller
  • A roller track for a storage rack or roller
    conveyor, comprising a wall arrangement, and a
    longitudinally-extending array of freely
    rotatable roller units supported on the wall for
    supportive engagement with a load, the roller
    units being disposed for rotation about generally
    parallel horizontal axes which are horizontally
    spaced along a longitudinally-extending conveying
    direction, each roller unit including an annular
    roller housing supported through an annular array
    of antifriction bearing elements on a support
    spindle for rotation about the respective
    horizontal axis.
  • Most common are free floating, no mechanical or
    electrical system used
  • 60-1000
  • Can safely go up to 60 fpm (depending on size of
    material)
  • Up to 25,000 lbs (for most depends on support and
    material used)
  • No real restrictions on volume of objects used on
    conveyor
  • Roller conveyors are one of the most common
    conveyors used in industry because they are
    inexpensive, simple to use and can vary depending
    on the needs of the business.

6
Chain
  • Chain-A conveyor on which material is transported
    along solid pans by the scraping action of
    crossbars that are connected by chains.
  • Chain conveyors use belts or rollers to move
    objects
  • Can handle loads of up 20,000 lbs
  • Speeds of up to 60 fpm, but depend on size of
    object, for safety reasons
  • Relay logic and pneumatic control devices used to
    control and program the chain
  • Costs range from 2000-60,000 (depending on
    amount of control logic needed)

7
Portable
  • Portable conveyors are used primarily for
    applications involving mobility and space is a
    high priority.
  • Portable conveyors are very versatile
  • Loads of up to 1000lbs (depends on the angle)
  • Can fold up 5-10ft and extend up to 17ft
  • Have multiple capabilities depending on need.
  • These are more common for small scale production,
    where use is temporary.

8
Vibrating
  • Vibrating conveyors operation is typically based
    on the natural frequency principle. At the
    natural frequency, the conveyor will vibrate
    indefinitely with only a small energy input. Once
    the drive initiates the conveyor's vibration, the
    supporting springs, by alternately storing and
    releasing most of the required energy, help
    maintain constant motion under the conveyed load.
  • Depending on the frequency and the size of the
    object can reach speeds as high as 35 fpm
  • No programming is needed, uses an on or off
    system to control it
  • Can handle objects lt1 - 90lbs
  • Can handle various sizes and shapes
  • Used in pharmaceutical and mining industries

9
Screw/Spiral
  • Spiral conveyors are used mainly for heating,
    cooling or accumulation
  • Screw conveyors use a rotating screw in a channel
    or tube to move material
  • Primarily run on a continuous motor that is
    simply on or off
  • Costs range from 500-30,000
  • Sizes up to 48 diameter tubing and can stack as
    high as 50 ft
  • Used in the pharmaceutical, food, and
    manufacturing industries
  • Useful for accumulation, drying, or moving
    vertically in a small space

10
Belt
  • Conveyor belts are used in a wide variety of
    material transport applications such as
    manufacturing, food processing, and heavy
    industry.
  • Commercial applications include
  • Agriculture
  • Construction - heavy building materials
  • Food and beverage processing
  • Forestry - logging, sawmill, paper pulp, etc.
  • Mining and quarrying
  • Factory production line
  • Belt Width ranges from 12 to 120
  • Belt Speeds determined by loads and speed
    required. Ex Bushels/hr dictates size.
  • Prices range from 500 to 30k or more for custom
    applications. Depends mainly on Length, Width,
    and Speed

11
Overhead
  • Overhead Conveyor Systems are typically used to
    convey unit loads in a variety of industrial
    applications, such as
  • Painting - Electrostatic, powder coating,
    fluidized bed, dip and conventional spray.
  • Washing - Parts and dunnage.
  • Oven - Pre-heat, baking, drying, flash off and
    curing.
  • Transporting - Products between work stations or
    plant operations to maximize floor space and
    increase efficiency.
  • Storage - Finished Goods, raw materials, work in
    process, and tooling.
  • Speeds can range from 3 fpm to 60 fpm and more
    based on application.
  • Capacities per unit load range from 30 lbs to
    1200 lbs (based on load connector type).
  • Unit spacing should be taken into account when
    determining length and operating capacity (varies
    by connector type).
  • Cost is determined by unit load, speed/motor
    size, and length. Price ranges from 30 per foot
    to 100 per foot.

12
New/High Tech Innovations
  • http//www.hytrol.com/view.cfm?fileprosortsc.wmv
  • http//v.youku.com/v_show/id_cb00XNzg0MjYzNg.htm
    l
  • http//www.ryson.com/Bucket.htm

13
Problem
  • A recirculating conveyor has a total length
    of 300 m. Its speed is 60m/min, and the spacing
    of part carriers along its length is 12 m. Each
    carrier can hold two parts. The task time
    required to load two parts into each carrier is
    0.20 min and the unload time is the same. The
    required loading and unloading rates are both
    defined by the specified flow rate, which is 4
    parts/min. Evaluate the conveyor system design
    with respect to the Speed Rule based on Kwos
    principles.
  • (hint http//www.et.byu.edu/ered/ME486/MatHandli
    ng.ppt)

14
Solution
  • The lower limit on speed is set by the required
    loading and unloading rates, which is 4
    parts/min.
  • npvc/sc gt Max RL, RU
  • (2 parts/carrier)(60m/min)/(12m/carrier)10
    parts/min gt 4parts/min
  • The lower limit
  • (60m/min)/(12m/carrier) 5 carriers/min
    ltMin1/(0.2),1/(0.2) Min5,55
  • The Speed Rule is satisfied.

15
Major Venders
  • Hytrol Conveyor Company ( all sorts of conveyors,
    does well with rollers and skate wheels)
  • Multi-Conveyor (manufactures for many different
    company types)
  • Titan Industries (custom made conveyors)
  • New London Engineering (has a wide variety of
    exchangeable conveyors)
  • Dorner Conveyors (primarily a belt company)
  • Ryson International (new and high tech conveyor
    types)

16
Summary
  • Conveyors are very versatile and can be an
    inexpensive way to move things
  • Rollers- are cheap and can move heavy objects
  • Chain- are more expensive but can do more
    complicated tasks
  • Portable- can be useful for small applications
    and are easy to store
  • Vibrating- useful for moving lots of small parts
    or things that are misshaped
  • Screw/Spiral- are useful for accumulation,
    drying, and moving things vertically in a small
    amount of space
  • Belt- are the most common type of conveyors and
    are very versatile
  • Overhead- take up less room than other conveyors
    and can deliver vertically

17
References
  • http//www.hytrol.com/about.htm
  • http//www.nleco.com/catalog.html
  • http//www.patentstorm.us/patents/6793060-claims.h
    tml
  • http//www.multi-conv.com/
  • http//www.carriervibrating.com/industries/typical
    _applications.asp
  • http//www.metzgarconveyors.com/conveyor/systems.h
    tm
  • http//v.youku.com/v_show/id_cb00XNzg0MjYzNg.htm
    l
  • http//www.et.byu.edu/ered/ME486/MatHandling.ppt
  • http//www.metzgarconveyors.com/conveyor/systems.h
    tm
  • http//www.conveyusa.com/beltconveyors.html
  • http//www.equipmentexpress24.com/Indexing20Conve
    yors/index.shtml
  • http//www.asipro.net/olc/73304545/page3.htm
  • http//www.martingregoryconveyor.com/overhead_conv
    eyor.htm
  • http//www.planiform.com/English/Products/Overhead
    EnclosedConveyors/photogallery.htm
  • http//www.mcnicholsconveyor.com/overhead.htm
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