Wood-Mizer TVS HD Industrial Sawmilling Line for Pallet Manufacturing
By Wood-Mizer, Europe
The Industrial Sawmilling Lines, or Wood-Mizer Systems, introduce automation and smart solutions to produce timber efficiently at lower costs. Glinkowski Sawmilling Company has operated its Wood-Mizer industrial sawmilling line in Poland since 2021. The line made it possible to customize the machinery to specific business needs and incorporate the existing equipment at the factory into the new Wood-Mizer Systems setups.
Since 1997, Glinkowski Company has been specializing in making quality pallets and supplying the local market with construction timber. The Glinkowski Company’s Wood-Mizer sawmilling line consists of the TVS HD twin-head vertical saw, the HR700 horizontal resaw, and the MR200 double-arbor multirip (also called a gangsaw), along with log loading deck, infeed, and outfeed tables, transfer tables, and sorting tables.
TVS HD Twin-Head Vertical Saw for Primary Breakdown
“The primary purpose of the sawmilling line is to produce boards for pallets most efficiently, i.e., maximizing yield from every log, speeding up the process, and reducing manual labor,” explains Adam Kubiak, Wood-Mizer Industrial Sales Manager. “The TVS HD is used in this line as the primary machine for breaking down logs – it makes 2-sided cants that are forwarded to the HR700 resaw to reduce their size. The last machine in the system, the MR200 gangsaw, saws the cants into boards to be used for pallet production. An essential addition to the line is the transferring and sorting tables that allow for a swift material flow.”
The horizontal deck at the beginning of the line is used for loading the logs onto the TVS HD infeed table. The outside part of the deck has been accommodated from the existing system and enables the stocking of the logs for continuous operation. Wood-Mizer offers loading decks with 3,6, or 6 m-long conveyors (12” or 20”), which can be easily customized to individual manufacturing needs.
The log deck is coupled with an inclined loading deck with arms that feed the TVS HD vertical saw. Once the log is on the infeed table, it is secured from the top by hold-down spiked wheels and transported on a chain with sprockets. The infeed table is synchronized with the loading deck, so the hold-down wheels move up at loading.
The operator monitors the cutting process from the control panel in front of the TVS HD. There is a joystick for loading, positioning, and feeding the logs and a setwork for adjusting sawing parameters, such as positioning and distancing the saw heads. Above the control panel, the operator can watch the process closely thanks to four surveillance cameras.
The twin-head vertical saw TVS HD was designed for processing logs with a diameter of 150 – 450 mm and a length of 120 – 520 cm. “On customer request, the engineers can customize the length to the required dimensions, e.g., 100 – 350 cm,” says Adam Kubiak. “Compared to the standard TVS vertical saw, the HD version is elevated about 254 mm above the ground to facilitate cleaning and allow the conveyor belt to collect the sawdust from under the saw heads. The standard TVS vertical saw features a single belt to transmit the power from the motor (11 kW, 15HP) and run the blades, while in the HD version, two separate belts are allowed to utilize more robust electric motors (18,5 kW, 25 HP).”
In the TVS HD, two types of blades can be used to break down logs – the standard 38-mm wide blades or the 50-mm wide blades (2-inch). The blade tensioning system is based on a manual hydraulic pump with a measuring gauge, feeding both sawmill blades. It is assisted by a pressure sensor, which can turn off the entire sawmilling line in case of a sudden pressure drop (e.g., blade breakage).
The outfeed table of the TVS HD features side discs and hold-down rollers controlled by optic sensors. The main task of this mechanism is to hold the 2-sided cant steady and feed it to the transfer table down the line. After separating the cant from the slabs, the side discs allow for a controlled fall of these slabs onto the incline transfer deck that transports the slabs away from the machine into another processing machine (in this case, it is a customer’s existing machine incorporated to the TVS HD sawmilling line). At the end of the TVS HD outfeed table, the final hold-down wheel moves sideways to turn the cants over to horizontal orientation. The cant is forwarded on a conveyor to another machine in the next step.
HR700 Horizontal Resaw for Reduce the Oversized Cants
The secondary breakdown machine is the HR700 single-head horizontal resaw, which reduces the size of 2-sided cants sawn on the TVS HD. All the oversized cants are first centered on the infeed table by a single vertical roller pushing each cant to the side fence. The HR700 horizontal resaw reduces the prism into two halves and passes it to the next machine.
“We decided to introduce the HR700 horizontal resaw to the line to eliminate the need for sorting the logs before feeding the TVS HD vertical saw,” explains Adam Kubiak. “This way, we can put all log sizes (150-450 mm wide) on the loading deck and break them down in two steps – first on the TVS HD and a second time on the HR700. For each 450-mm wide log that we process on the TVS HD, we get a 400-mm wide 2-sided prism and two slabs that go on for further resaw, and in the next step, we convert the oversized cant into two 200-mm wide cants on the HR700. ”
The HR700 single-head horizontal resaw is modular and can work in clusters of 6 heads. It is offered with 11-kW or 15-kW electric motors and uses 32-38-mm wide sawmill blades that move on 600-mm diameter blade wheels. The blade tensioning system relies on a manual hydraulic pump with a measuring gauge. Like the TVS HD, it is assisted by a pressure sensor, which can turn off the sawmilling line entirely in an emergency.
“In the third step, the two 200-mm wide cants will be fed to the MR200 gangsaw, which will convert them into boards, ideal for pallet production standards,” explains Adam. “We must remember to reduce the volume of slabs, where ideally we should make not more than 1-2 boards out of each slab and forward the main volume to the MR200 gangsaw to get the most out of each log.”
Once the prism has been reduced in size on the HR700 horizontal resaw, the cants must be separated and positioned in a single line on the infeed roller table equipped with a simple separator based on an optical sensor and a pneumatic cylinder. The cants are swiftly forwarded on a 3-m long roller conveyor. Before the cants enter the MR200 double-arbor gangsaw, they are centered by side fences and hold-down wheels. The centering infeed table before the MR200 operates in sequence using optic sensors – once the cant is between the centering rollers, it is pressed evenly by the side fences, and only next is it held down by the top rollers. It also features special plates on the center table to feed shorter, 800-mm-long cants.
“The roller transfer table here is not only for separating, creating proper gaps, and centering but also for one more thing. In the sawmilling line, the LT20 sawmill is used to process oversized logs that the TVS HD vertical saw cannot handle,” says Adam. “This roller table is used to put the cants made on the LT20 and feed them to the MR200 gangsaw. In this situation, only part of the sawmilling line is activated. The side fences are removed, and the cants can be loaded onto the rollers with a forklift.”
Making Final Boards with the MR200 Gangsaw
The primary purpose of the MR200 gangsaw in the Glinkowski Sawmilling Line is to turn 200-mm wide cants into boards and pass the material further onto the sorting table for collection. The roller outfeed table features a plate at the end of the line, activating the final collection table with cross chains. It is activated only briefly to allow the assistant to pick up the boards.
The MR200 double-arbor multirip features two shafts with a maximum of 24 circular blades that ripsaw the prism into several cants in one pass. It is a standard machine used in a sawmilling line to increase the efficiency of a modern wood company. The MR200 has a crank handle with a screw on the top to adjust the positions of the arbors and the height of the head. “In this machine, we’re able to position both arbors separately,” says Adam Kubiak. “Under the arbors, a chipper mills all small pieces of wood and bark. It is an important machine component, as wooden debris often clogs the extraction outlets.”
All the machines from this line are designed to be connected to a vacuum extraction system to minimize the sawdust in the workplace and keep it as tidy as possible. Also, electric cables are guided in the ducts under or over the line to make cleaning under the machines easier.
For more information, please get in touch with your local sales representative or visit the website https://woodmizer.co.uk/contact.