Bi-directional Seaming Machine for Large Sheet Materials
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Solution Overview
Problem
The existing seaming processes for forming larger sheets of material are time-consuming and labor-intensive, requiring multiple people to handle and position sheet segments, and involve inefficient carriage movement and material handling, especially when forming large tarps or similar heavy materials.
Innovation Solution
A bi-directional seaming machine that unwinds and positions sheet segments from rolls on either side of a frame, allowing for simultaneous seaming in both directions, reducing the need for manual handling and optimizing the use of space by using a movable table and adjustable components to accommodate material as it piles up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-direction carriage is used for seaming, then the seaming device can complete seams, but the carriage must move back and forth losing time when no welding occurs
Solution Approach 1:
The patent applies bidirectional movement capability to the carriage system, allowing it to dynamically change direction and Seam in both directions along the sheet material. This eliminates the idle return trip by making the carriage productive during both forward and backward movements, directly resolving the time loss contradiction.
Solution Approach 2:
By enabling the carriage to Seam continuously in both directions without requiring idle return movements, the system maintains continuous useful action. The carriage is productive during every movement phase, eliminating downtime and maximizing welding utilization.
2Productivity
If sheet segments are manually handled and repositioned during seaming, then additional segments can be added, but four or more people are required and the process is labor intensive
Solution Approach 1:
The system employs automated material handling mechanisms including feed rollers and positioning systems that automatically advance and position sheet segments without manual intervention. The apparatus serves itself by automatically managing material flow, alignment, and feeding through the seaming process.
Solution Approach 2:
Manual mechanical handling by multiple workers is replaced with an automated mechanical system comprising motorized feed rollers, positioning mechanisms, and controlled material advancement systems. This substitution eliminates the need for four or more people while maintaining seaming throughput.
3Adaptability or versatility
If material hangs off the table during seaming, then additional segments can be positioned, but it pulls on the material atop the table and adds to alignment difficulty
Solution Approach 1:
The table or work surface is made movable rather than fixed, allowing dynamic adjustment of its position and orientation. This enables the system to adapt to material accumulation while maintaining proper alignment through controlled movement, resolving the conflict between positioning flexibility and alignment precision.
Solution Approach 2:
The system creates equipotential conditions by ensuring that material tension and positioning forces are balanced throughout the seaming process. By coordinating material feed rates and table positioning, the system eliminates differential pulling that causes misalignment.
Data Source
AI summary
A seaming machine and method are provided for seaming segments of sheet material to one another to form larger sheets. The machine typically includes a frame with a pair of spaced seaming devices mounted thereon for respectively seaming opposed edges of the segments of sheet material to one another. The process allows for the seaming of multiple sheet segments while the sheet segments remain atop a work surface. Relative back and forth movement between various components and the work surface typically facilitate the process.