International Paper |
SIC: 2656
|
Hytrol Distributor: FloStor Engineering, Inc. (Hayward, CA)
System Upgrade Leads to Higher Reliability
Conveyors, computers, and Columbia palletizers
combine to improve shipment reliability at International Paper distribution
center.
Reliability is a critical factor at International
Paper's beverage packaging operation in Turlock, California. Every day, the
facility must accurately ship thousands of cartons to customers across the
western states as well as to overseas destinations. These cartons contain
the packaging products used for milk, juices, and other liquid necessities
of daily life.
Downtime can be disastrous to an operation like this. Multiple order
changeovers need to be made almost literally on the fly. When a carton run
is completed for one customer, another order is immediately introduced into
the system.
The process of getting the right carton to the
right palletizer for shipment preparation has to be fast, accurate, and
efficient. But, with the old materials handling system in place prior to
November 1998, that was not always the case. One of the palletizers, an old-style
gantry type, had trouble keeping pace with order demand. The existing merge
line sometimes experienced back-up problems. And there were multiple "jam"
points that required stopping the line, manually correcting the problem,
and then ramping up again.
"We were just not achieving the kinds of reliability
levels needed to meet our shipping goals," sums up Ron Young, maintenance
team leader at the 150,000 square-foot facility.
The solution was to modernize and upgrade the
entire order-flow process. Working closely with systems integrator and Hytrol
distributor FloStor Engineering of Hayward, CA, International Paper created
a highly dependable order-flow process that incorporates advanced computer
controls, dependable conveyor units, and automatic palletizers. FloStor provided
a turnkey service-integrating the computer software, hardware, electrical,
palletizers, and conveyors.
Streamlined Product Flow
Product now moves through the Turlock facility smoothly
and efficiently. The order-flow process starts in the carton sealing department,
located in a walled-off area adjacent to the distribution center. Here the
cartons are sealed and imprinted with a four-digit bar code that identifies
the destination palletizer.
Seven sealer lines lead from this area to the
distribution center. A roller belt incline conveyor moves the cartons up
to a horizontal belt conveyor, which then inducts them into a recirculating
sortation conveyor in the D.C. The recirculation loop is required to separate
orders during changeovers. With the new computer controls and conveyor system,
these changeovers now happen quickly with no interruption to product
flows.
Seamlessly integrated into the sortation loop
are several different conveyor types-roller bed, powered belt curve, and
live roller. The live roller segment that leads to the power pivot diverters
(PPDs) has the EZ Logic feature. This unique capability from Hytrol automatically
senses product presence and effectively controls the accumulation and release
of product from zone to zone.
Directed
by the computer controls, the PPDs feed the four lanes leading to the palletizers
and the one lane reserved for "no reads," hand stacking of pallets, and other
special operations.
When the pallets are built, the palletizer releases
them to an automated transfer cart station. The transfer cart then moves
them onto a chain-driven roller (Hytrol's CRR model). This heavy-duty
chain-driven conveyor brings the pallet to a stretch wrap machine. A bypass
switch at the infeed of the stretch wrapper allows operators to stop the
pallet and install corner parts (when required), label the loads and perform
QC functions, and so on. The chain conveyor then moves the pallet onto a
gravity conveyor where they await transport by forklift to the shipping
area.
Reliability and More
Management at Turlock reports that the new
system has lived up to expectations. "With our order changeovers happening
so fast," says Maintenance Team Leader Young, "we needed a system that would
give us a consistently high level of shipment accuracy. We now have that.
Customer complaints about mis-shipments have dropped dramatically since the
system was installed."
But the benefits have not stopped there. Less
conveyor downtime has resulted in less carton sealer downtime, which has
lowered the cost per carton shipped. Also, there's less maintenance required
on the new conveyor and palletizer equipment-another contributing factor
to lower operating costs.
In short, the new system at International Paper's
Turlock operation is not only reliable, but also cost-efficient.
International Paper's Distribution Center at the
Turlock plant
An incline conveyor takes the cartons from the sealer area to a
horizontal belt conveyor and into the distribution center. The cartons move
onto a sortation conveyor, which also serves as a recirculation loop during
order changeovers. Powered pivot diverters send the cartons either to one
of the four palletizer lanes or to the lane reserved for manual pallet stacking.
The palletizers release completed orders to a transfer cart station, which
then moves them onto a chain-driven roller. After shrink wrapping, pallets
are moved onto gravity conveyors where they await pickup by forklift truck
and transport to the shipping area.
A Snapshot of the Facility
Company: International Paper
Facility: Beverage packaging plant
Location: Turlock, CA
Size: 150,000 square feet
Employees: 130
Maintenance Team Leader: Ron Young
Product Handled: Beverage cartons
Control system: PLC-based, configurable operator interface
Conveyor Supplier: Hytrol Conveyor Inc., Jonesboro, AR
Systems Integrator: FloStor Engineering, Hayward, CA
|
Types of conveyors:
- Incline
- Slider Bed
- Accumulating
- Gravity
- Chain Roller
- Powered Pivot Diverter
- Transfer Cart
|
Go Back To
Case History Home Page
|