Tufting Machine Edge Yarn Column for Seamless Carpet Joining
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Solution Overview
Problem
In tufting machines with dual needle bars, the alignment of needles causes web warping, leading to undesirable edges and difficulties in trimming carpets for seamless joining, resulting in waste and mismatched patterns.
Innovation Solution
The needles are laterally fixed or shifted to create an additional column of yarn at the edge of the carpet, spaced further than the interior rows, allowing for enhanced seaming without voids or color changes, enabling easier trimming and matching of patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If needles are aligned in dual needle bar tufting machine, then production efficiency is improved, but web warping occurs causing undesirable edges
Solution Approach 1:
The patent applies preliminary action by forming an additional column of yarns at the edge portion of the carpet before the normal tufting process. This pre-formed structure serves as a guide for subsequent trimming operations, ensuring that edges can be cut accurately without causing web warping or pattern mismatch during installation.
Solution Approach 2:
The patent segments the carpet structure by creating a distinct additional column of yarns at the edge portion, separated from the main body of the carpet. This segmentation allows the edge area to be treated differently during trimming and installation, enabling precise cuts without affecting the overall carpet integrity or causing web warping.
2Productivity
If conventional tufting is used, then carpet production is efficient, but trimming difficulties arise causing pattern mismatch
Solution Approach 1:
The patent performs preliminary action by pre-forming the additional column of yarns that will serve as trimming guides. This preparation is done during the normal tufting process, so that when trimming is needed later, the work can be done quickly and accurately without pattern mismatch, significantly reducing installation time.
Solution Approach 2:
The additional column of yarns acts as an intermediary element between the main carpet body and the trimming operation. This intermediary structure provides a clear visual and physical guide for where to make cuts, eliminating the time-consuming process of measuring and calculating cut locations to avoid pattern mismatch.
3Loss of substance
If edge trimming is performed without guidance, then material waste increases, but precision is lost
Solution Approach 1:
The patent uses color changes by forming the additional column of yarns in a different color or with different properties than the main carpet body. This visual distinction allows trimmers to easily identify the exact location where cuts should be made, ensuring precision without wasting material through excessive trial and error or conservative cutting margins.
Solution Approach 2:
The additional column of yarns serves as an intermediary guide structure that mediates between the trimming tool and the main carpet body. It provides a clear target for cutting operations, enabling precise trimming with minimal material waste by eliminating the need for excessive safety margins or repeated adjustments.
Data Source
AI summary
A carpet and method for producing same that comprises an enhanced seam suitable for separation of an installation portion of the carpet and sacrificial edge portions of the produced carpet.