CLT Panel Cutout Assembly Using Rotated Sub-Layers
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Solution Overview
Problem
The production of cross-laminated timber (CLT) panels with integrated window and door cutouts requires two different joining machines to lay and glue boards perpendicular and parallel to the panel's length, complicating the manufacturing process.
Innovation Solution
A method and device that allows both longitudinal and transverse layers of CLT panels to be produced on the same or structurally identical joining system by dividing and rotating boards to create cutouts, enabling the production of both layers at a single station, and using a combination of cutting, gluing, and rotating devices to form the transverse layer from a second longitudinal layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two different joining machines are used to lay boards perpendicular and parallel to the panel length, then both longitudinal and transverse layers can be produced, but the manufacturing process becomes complicated
Solution Approach 1:
The patent applies multi-functionality by enabling a single joining machine to perform both longitudinal and transverse layer production. The machine is equipped with adjustable guiding rails and positioning systems that allow it to accommodate boards in different orientations (perpendicular and parallel to panel length), effectively replacing the need for two separate specialized machines while simplifying the manufacturing process
2Device complexity
If boards are divided and rotated to create cutouts using a single joining system, then production complexity is reduced, but additional processing steps are required
Solution Approach 1:
The patent applies preliminary action by pre-dividing boards into segments before they reach the joining machine. These pre-divided boards are then positioned and joined in a specific sequence that automatically creates the desired cutout shapes (windows and doors) in the final panel. This preliminary preparation allows the single joining machine to produce complex panels with integrated cutouts without requiring post-production cutting operations
Solution Approach 2:
The patent applies segmentation by dividing the panel production into distinct board segments that are joined in a specific sequence. Boards are divided into longitudinal and transverse segments that are alternately laid and glued, with strategic gaps left to form cutouts. This segmentation approach enables a single machine to handle the complexity of creating panels with integrated windows and doors through systematic piecewise assembly
Data Source
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AI summary
The invention relates to a method for producing cross-laminated timber panels with cutouts (A1, A2,...) which are composed of at least one longitudinal layer (L) in which the boards (L1, L2, L3, ... L20, L21, L22) are arranged parallel to each other in rows (I, II, III, IV, V, VI, VII, VIII, IX, X) in a longitudinal direction (RL), and at least one transverse layer (Q) in which the boards (Q1, Q2, Q3, ...Q1, ..., Q26, Q27, Q28) are arranged parallel to each other in rows (1, 2, 3, ... 26, 27, 28) in a transverse direction (RQ), wherein in a first operation to produce the cutouts (A1, A2, ...) in the longitudinal layer (LE), the boards in the rows (IV, V, VI, VII, VIII, IX, X) in which they are arranged Cutouts (A1, A2, ...) are located in individual boards (L4, L5, L6, ...L20, L21, L22) are divided and then laid down to form a first longitudinal layer (L1) and glued together along their long sides, with both the longitudinal layer (L) and the transverse layer (Q) being produced in the same or the same joining station (200), in a second operation a second longitudinal layer (LZ) is first formed from a plurality of individual boards (B1, B2, ...) in several rows (I, II, III, IV, V, VI), with individual boards (B4, B5, ... Bi, ... B10, B11) being laid down in some rows (IV, V, VI) to take into account the cutouts (A1, A2, ...) and glued together along their long sides, whereby the second longitudinal layer (LZ) is formed with a stepped profile in the transverse direction RQ, with the area of the second longitudinal layer (LZ) being equal to the area of the first longitudinal layer (LE) without the cutouts (A1, A2, ...) corresponds to, in a third step the second longitudinal layer (LZ) is divided into at least two sub-layers (A, B, C, D, E, F) and the divided sub-layers (A, B, C, D, E, F) are rotated by 90°, in a fourth step the sub-layers (A, B, C, D, E, F) rotated by 90° are placed next to each other to form the transverse layer (Q) and connected in such a way that the cutouts (A1, A2, ...) are formed here as well, in a final step the transverse layer Q is placed on the longitudinal layer L and the superimposed layers are glued together.