Veneer Grading Line System
Grading Table and Walkway
A series of belts with plastic strips between them carry the veneer bundles down the length of the table. At no time does the veneer touch unprotected steel; wear surfaces are made of plastic and stainless steel. Bundles down to four inches wide can be loaded side by side with no space between them to maximize the throughput. A speed-up section is located at the end of the grading table to create the space between the bundles required for proper operation of the rest of the system. A gearbox and variable-speed motor drives the belts.
Six Modular Sorting Bays with Storage Decks
After the bundles pass the speed up section, they begin to transfer onto the sorting bays. Each sorting bay has a series of belts that carry the bundles. If a bundle in destined for that bay, a tipple opens to allow that bundle to transfer below onto the storage deck. Tipples are activated by pneumatic valves and high-quality cylinders with appropriate cushions and controls.
Sensors locate the leading and trailing edges of the bundles and index them on the storage deck to maximize the storage capacity. As the deck fills, a light flashes to notify the persons stacking that the bay is getting full. If the bay completely fills and another bundle is on the tipple ready to be indexed, the system will stop until sufficient room is created by moving a bundle from the bottom of the storage deck.
When the stacking persons are present to unload the deck, there is one button they can push to move the bundles to them if the bundles are not within reach. At this point, each bundle they remove allows the system to advance another bundle to their reach. When the stacking persons finish unloading the bay, they simply press the button again to return the system to indexing. If they forget to press the button before leaving, the system returns to indexing in six seconds. Each bay is constructed to allow the future addition of more bays.
Sorts and Singles Table
In practice, we have found the most efficient way to achieve fast sorting and to minimize the initial cost of the system is to allow the grader to pull the shorts and singles from the table and not send them down the line. This table can take up to six sorts. Using this method, you can achieve up to 10 to 12 sorts with only six automatic bays. We supply a table with movable dividers to store these bundles for stacking.
Electrical, Safety, and Controls System
All motor and function controls are enclosed in cabinets, including the main disconnect. All cables from the control cabinet are included and run in protective tubing. Customers must bring power to our control cabinet.
Our system has operator’s station for the infeed conveyor and scissors lift located near the scissors lift. Another for the grading line is located along the grading line railing. Safety E-stops or pull cables are included at every work station.
The machine requires the reading of existing bar codes for proper location control and inventory data. We include a bar code reader at the end of the grading table and one at each modular bay. This way we ensure that bundles are accurately placed. Integration with the customer’s existing database and inventory controls system is not included in our price. The customer is responsible for implementing the connection between our system and their existing system.
We supply the machine with the main voltage required for local demands. Control voltage is 24v DC.
The machine will be supplied as an assembly with a complete frame ready to be placed on your concrete floor. The customer is responsible for providing a proper concrete floor for the machine. The loading is low enough to sit on most existing concrete floors. The unit will be bolted to the floor upon final placement.
Additional Modular Sorting Bays with Storage Decks
The system is designed to allow the addition of almost unlimited additional bays. They are priced individually and in groups for additional savings. Installation of each additional bay takes approximately three working days.
Pallet Infeed and Return Section
A gearbox and motor drives two chains running in tracks fitted with wear strips to bring the full pallets onto a scissors lift in front of the grading table. A scissors lift (included) positions the pallets at the correct height for comfortable loading of the grading table. The standard arrangement is for the incoming pallets to come from the side of the scissors lift. The standard chain infeed deck is approximately 26 feet long. A set of gravity rollers allows a platform loaded with empty pallets to be easily pushed back for removal by a forklift.