All boards going through the sawmill will eventually end up at the trimmer. Two operators will pull any boards out that do not meet any quality standards and ensure the boards are lined up properly to go through the trimmer. The trimmer will trim the ends off the boards to meet length specifications or to remove any defects.
After passing through the boards will be dropped into bins to match similar lengths and dimensions for stacking. Once these bins are full, they will be dropped onto transfer chains where they will be brought to the stacker. The stacker will place horizontal tiers in a stacked formation so that the boards can be dried through out kilns and sent to the planer mill.
Creating lumber can be quite the process! If you have the opportunity to tour a saw mill I definitely recommend it. Thanks for reading blog 4! Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Logs to Boards — How does a sawmill work?
July 26, pm Published by Gillian Stauffer Leave your thoughts gillian-stauffer-sawmill-blog-In blog 2 I talked about how I pull sample boards from some of the machine centres in the saw mill, so I thought for this blog it would be a good idea to go over those machine centres while describing the flow of the mill.
Logs await to be sent through the canters. Trimmer area at work. How our swingblade circular sawmills work. The Concept. The First Cut. The Return Cut. Step by step. The cutting begins at the top of the log with the blade in the horizontal position, where small waste pieces are removed to expose the first useable layer of the log.
The horizontal cut is always done pushing forward, and the vertical cut is always done pulling backward. Once you have reached your desired depth of cut, you can remove the waste edge from the left of the log by cutting forward horizontally to the far end of the log, and then pivoting the blade into the vertical position and pulling backwards. Remove the waste piece of timber. You can now cut your first board.
With the blade in the horizontal position, move the horizontal sizing slide to the desired width of board. After several heart attacks he had to leave the mill. Even though Mr. Rutledge moved slowly, every move he made counted towards creating lbs. It was fueled with the scrap wood and sawdust produced by the sawmill. The number of toots on the signal whistle communicated whether the engineer should start, stop or run slow.
The fireman shoveled a mixture of freshly cut sawdust and tossed 4 foot lengths of scrap wood from the mill into the fireboxes.
The boiler is the heart of the mill as it heats water to make steam. The steam is fed to the various steam engines in the mill by big black iron steam pipes wrapped with insulation. The insulation keeps crew and visitors safe from the hot pipes and the wrapping keeps the steam hotter and more powerful for the steam engines.
We are presently looking for another diesel fired horsepower boiler that will produce lbs. If you know of one please contact us. Our present active boiler is an Atlas Steam Generator. This boiler powers 5 steam engines under and around the sawmill. Our present boiler is fired automatically with diesel rather than scrap wood and sawdust to comply with air quality regulations.
As a result we no longer have a fireman, only engineers. The Atlas steam engine runs at revolutions per minute. The twin cylinder steam engines are different from any of the other steam engines in the mill because they can run in either direction, and can change directions immediately from forward to reverse.
This is our smallest steam engine and was manufactured in San Francisco. These twin cylinder engines, each with a 10 by 13 inch bore and stroke, sit side by side separated 8 feet apart by a vertical boiler and giant cable drums and gears all bolted and riveted on I-beam steel skids. Our ancient lumber planning flat-bed planer is powered by an old Fairbanks-Morse model Y hit-n-miss diesel engine. The moving metal plates on the bottom of this planer transports rough-sawn lumber, up to 2 feet wide and as thick as 12 inches, under four sharp spinning knives to create a smooth planed or surfaced finish.
Modern planers surface all four sides of the rough-sawn lumber at once. Our historic planer surfaces one side at a time. As you watch the mill in action you will be fascinated by how our crew works together in synchronicity, almost like a ballet between men working together with their machines.
Few words are spoken while they are working in the mill because… who can hear anything when the sawblades are working? A nod or a gesture usually communicates the next move. They will be glad to explain the machinery and the processes of milling lumber to you. Unloading the logging trucks Logs came to our sawmill on logging trucks. The Landing Once the logs were delivered to the sawmill by the logging trucks, they had to be rolled into the mill.
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