Veneer Cutting and Sorting Apparatus for Continuous Defect Separation
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Solution Overview
Problem
Existing veneer cutting and sorting apparatuses face challenges in accurately sorting defective veneer portions from product veneer at high speeds, often requiring temporary cessation of veneer peeling and transportation, which hampers productivity in laminated wood production.
Innovation Solution
A veneer cutting and sorting apparatus featuring a knife assembly and knife edge receiver assembly driven by a servomotor through a gear transmission, allowing precise cutting and separation of defective veneer portions from product veneer without interrupting the flow, using a control system to determine the boundary position and rotate the rolls for simultaneous cutting and support of the product veneer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If veneer peeling and transportation are stopped temporarily to remove trash veneer, then sorting accuracy is improved, but productivity deteriorates
Solution Approach 1:
The sorting lever is pre-positioned in the lowered intersecting state before the veneer arrives. The control system detects the boundary between defective and product veneer in advance and actuates the sorting lever to the upper retracted position before the defective portion reaches the sorting point, enabling accurate sorting without stopping the conveyor
Solution Approach 2:
A control system with sensors detects the position of the boundary between defective and product veneer in real-time and provides feedback to actuate the sorting lever at the precise moment, ensuring accurate sorting while maintaining continuous high-speed operation
2Productivity
If veneer is conveyed at high speed to increase productivity, then productivity is improved, but sorting accuracy deteriorates
Solution Approach 1:
The boundary between defective and product veneer is detected in advance upstream, and the sorting lever is actuated to the retracted position before the defective portion reaches the sorting point, allowing accurate sorting decisions to be made with sufficient time margin even at high conveyance speeds
Solution Approach 2:
Real-time feedback from boundary detection sensors enables the control system to calculate the exact timing and position for actuating the sorting lever, maintaining high sorting accuracy despite the high speed of veneer conveyance
Data Source
AI summary
A veneer cutting and sorting apparatus is disclosed. The apparatus includes a revolvable knife blade having a cutting edge and a revolvable knife edge receiver having a cutting edge receiving surface. The knife blade cuts a veneer sheet as peeled from a peeler block by a veneer lathe at a previously detected boundary between defective veneer portion and product veneer sheet on the cutting edge receiving surface then revolving at the same peripheral speed as the cutting edge of the knife blade. Cut-off defective portion is allowed to drop off by its own weight.