Glulam Beam Fabrication via Continuous Finger-Jointing and Adhesive Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for an efficient method and system to fabricate glulam beams that can produce longer structural timber members by continuously controlling moisture content, end joints, adhesive application, glue line pressure, and clamping time, while also addressing the limitations of solid dimensional lumber lengths.
Innovation Solution
A system comprising a finger-jointing unit and a beam-forming unit that processes wood pieces into glulam beams at a high rate, with continuous control of moisture content, adhesive application, and clamping time, allowing for the production of longer structural timbers with improved strength and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If solid dimensional lumber is used to create longer structural members, then the length of the timber member can be extended beyond typical 22-24 foot limits, but the complexity of joining multiple pieces increases and production efficiency decreases
Solution Approach 1:
The timber is divided into multiple smaller laminations that are stacked and bonded together to form a continuous long member. This segmentation allows the creation of members exceeding 24 feet in length by combining multiple 8-12 foot laminations into a unified structural element through adhesive bonding, eliminating the need for complex field joining operations.
Solution Approach 2:
Multiple separate wood laminations are merged together through adhesive bonding to create a single integrated structural member. The glulam manufacturing process combines numerous individual pieces into one continuous beam, achieving both extended length and structural integrity without requiring complex mechanical joints or connectors.
2Manufacturing precision
If traditional batch processing methods are used for glulam fabrication, then quality control can be maintained, but production speed is limited and manufacturing efficiency decreases
Solution Approach 1:
The glulam manufacturing process transitions from batch processing to continuous production, where laminations are constantly fed through the manufacturing line. The continuous operation maintains quality control through consistent adhesive application and pressing parameters while achieving production speeds of hundreds of linear feet per minute, dramatically increasing manufacturing efficiency.
Solution Approach 2:
Laminations are pre-prepared with adhesive application before being stacked and pressed together in a continuous flow. This preliminary adhesive application ensures consistent bonding quality while enabling high-speed production, as the bonding process is initiated before the final pressing stage and continues uninterrupted through the manufacturing line.
3Productivity
If high production speeds are achieved in glulam manufacturing, then productivity increases, but control over moisture content, adhesive bonding, and clamping pressure becomes more difficult
Solution Approach 1:
The continuous glulam manufacturing system incorporates feedback control mechanisms that monitor and adjust moisture content, adhesive application rates, and pressing pressure in real-time. Sensors and automated control systems maintain optimal bonding parameters even at high production speeds of 500-600 linear feet per minute, ensuring consistent quality throughout the continuous production process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables the production of high-quality, longer glulam beams at a competitive cost, with increased strength and quality standards, including shearing resistance, delamination resistance, fire resistance, and dimensional stability, while reducing production time and improving adhesive bonding.
Implementation Method 1
assembling the wood pieces of the target length into structural timbers of a target thickness; mixing and applying of adhesives
Data Source
AI summary
A method and a system for glulams fabrication, comprising obtaining wood pieces of a target length from raw materials; and assembling them into structural timbers of a target thickness in a continuous line, whereby moisture content, end joints, mixing and applying of adhesives, glue line pressure and clamping time are continuously controlled.