IPC e newsletters now available on CD.
We often get requests for previous editions of the IPC e newsletter. On popular demands we have put together the past editions of the newsletter on a CD. This CD includes IPC e newsletters from 2001 2002 2003 and 2004 along with free e-book " The Powder Coating Manual". The CD is available against a processing fee of Rs 500/- or USD 11.00 only. (service tax 10.2% extra, + Courier charges).
The new logger has some great new features! It can accommodate a wide range of K and T type thermocouple probes which offers the user greater flexibility, a quick response time and higher accuracy. For ease of use, the new logger also has USB communications which not only facilitates PC communications but also allows you to connect directly to a USB printer and get immediate reports without ever touching the PC.
The new 6 channel logger is small and compact making it suitable for use in a variety of applications. It is battery operated, easily portable and can be set-up via a simple 3 button operation or from the PC. Simply power up the logger, connect the thermocouples and carry out the tests. The logger automatically detects when sensors are connected making setup even easier! The logger can be configured to automatically start and stop logging on time or temperature levels and has the capability of logging up to 8 readings per second to provide a more detailed analysis in fast changing temperature processes.
The OQ610 is supplied with SquirrelView software; a powerful and easy to use application for configuring, downloading, displaying and analysing data from the logger. SquirrelView can also automatically calculate cure times when needed in applications using conveyor ovens.
At the touch of a button the OQ610 temperature logger can directly
print user-configurable, concise reports to simplify record keeping
and provide ISO9000 quality records for compliance and traceability. <more>
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|Powder Coating Manual, Types of Conveyor----- (Part - 46)|
3 Types of Conveyor
Conveyorized powder coating systems are designed for higher volume operations. Belt conveyor, chain-on-edge conveyor and overhead conveyor are used in powder coating systems. The simplest overhead conveyor is a hand-push trolley system. It has load bars attached to trolleys that ride in a box-shaped track or on a beam. Load bar assemblies can be designed to hold loads of anywhere from 250 pounds to 4,000 pounds. Movement of the parts suspended from the trolley assembly is accomplished by an operator who pushes the trolley along the track. Usually, these systems do not have any elevation changes. Switches can be used to route the load bar through one of several powder booths or other discreet stations within the system. The switches, which look and act like railroad switches, are activated by the operator who pulls a cord to move the part onto the appropriate track. Parts stand motionless inside each station of the operation. These systems can provide excellent flexibility for the low-volume coater.
Powder coating on blank sheets is done with a belt conveyor. The blank sheet of steel is laid flat on a belt conveyor and moved at very high speed under a row of fixed guns. It is then conveyed into an infrared oven for curing. The blank sheet of steel is used for appliances or similar products that can be fabricated from pre-coated stock. A chain-on-edge conveyor supports the part on a spindle above the
conveyor chain. The chain is sometimes a rivetless-overhead chain or a roller chain that is run on its side. The chain pitch is typically 2 to 3” and loads are limited to around 25 pounds. Chain-on-edge systems are used for situations where a single part, or small family of similar parts, can be run through a fixed gun arrangement, with rotation to access the entire part surface. Chain-on-edge systems are also run at high speed and parts are cured with infrared ovens. Oil filter canisters or similar parts with uniform shapes work very well in these systems, producing parts at a very fast pace.
The most common type of conveyors for powder coating is the continuous speed, overhead system. These systems use a conveyor drive to power the product through the system with a fixed or adjustable line speed.
Enclosed track and I-beam type conveyors are commonly used for powder systems. The enclosed track works well for lighter duty situations. When a more heavy-duty chain is required the overhead conveyor will be an I-beam. I-beam conveyor comes in different sizes ranging from 3” to 6”.
Selection depends mostly on the product size and weight. Each conveyor has a limit of weight that can be hung on each hanger point and a different chain pitch between available centers.
• Enclosed track – 80 lbs.
• 3” I Beam – 250 lbs.
• 4” I Beam – 500 lbs.
• 6” I Beam – 1,200 lbs.
Enclosed Track Conveyor
The enclosed track conveyor uses a box-shaped section of track with a slot in the bottom. The chain has vertical trolleys to support the work in process and horizontal wheels to maneuver the chain through the horizontal turns. The typical standard pitch distance between hanger centers on enclosed track conveyor is 8 1/8”. Hanging attachments can be installed at each available site or any increment of 8 1/8.” Two hook sites can be connected by a loadbar attachment to double the capacity of the hanger.
Enclosed track conveyor is generally lower in cost than I-beam since the track components are standard sizes that are usually readily available from stock. Rollers or traction wheels are not required for turns because the chain rides inside the track. Horizontal turns can have a tighter radius than I-beam systems, which can be an advantage in the sizing of the equipment and overall layout.
In an I-beam system, the trolleys ride on the lower flange of the beam. The rivetless chain is suspended from the trolley attachments below the beam. A variety of attachments can be bolted to the end of the trolley attachment. Like the enclosed track conveyor, attachments can be joined by a load bar to increase the capacity per hook site. The larger the size of the I-beam, the more weight the conveyor will support. Horizontal turns in I-beam systems are supported by rollers or traction wheels to maintain tension on the chain and guide it through the turn. The turn radius is limited to a minimum of a 2’ radius. Turns should be carefully sized to make sure that parts will not hit each other or come in contact with any surrounding equipment or building steel. The center distance is reduced as the part passes through the turn. To size the turns, an analysis of the conveyor part-path is performed with the largest part, racked on typical production hanging centers. The turn radius must be big enough to allow for the swing-out of the part as it passes through the turn. Changes of elevation need to be studied also, to make sure that parts have adequate clearance in the incline. A sharp degree of incline may force the operator to hang parts farther apart. A good starting point is 15° from the horizontal. Inclines with a sharper angle should be checked to make sure that parts will clear.
India Powder Coating
3, Lalaram Nagar, Indore, 452001 MP India
Phone 91 731 2492291
emails: firstname.lastname@example.org , email@example.com , firstname.lastname@example.org
Alternate url http://www.geocities.com/indiapowdercoating , http://ipconweb.tripod.com
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