Dual Needle Bar Tufting System for Cut and Loop Pile Pattern Formation
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Solution Overview
Problem
Existing systems for forming tufted carpets with precise and varied patterns are costly and limited in design precision, particularly in creating patterns with intermixed cut and loop pile tufts and woven appearances.
Innovation Solution
A tufting machine system with longitudinally spaced needle bars, controlled yarn feed mechanisms, and shift mechanisms that allow for the formation of cut and loop pile tufts in the same longitudinal rows without requiring expensive pattern attachments, enabling precise and cost-effective creation of complex patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expensive pattern attachments are used to form precise and varied patterns, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the pattern formation capability from complex mechanical pattern attachments and relocates it to the control system. The tufting machine controller coordinates multiple needle bars and yarn feed mechanisms to create patterns through electronic control rather than mechanical pattern-specific attachments, thereby eliminating expensive pattern attachments while maintaining pattern precision.
Solution Approach 2:
The patent implements multi-functionality by using standard yarn feed mechanisms and multiple needle bars that can be independently controlled to form various patterns. The same hardware configuration can produce different patterns by changing control parameters, making the system universal and eliminating the need for specialized pattern attachments for each design.
2Manufacturing precision
If multiple needle bars with staggered needles are used to form intermixed cut and loop pile tufts, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the tufting function into multiple needle bars (first and second needle bars) with different needle arrangements. The first needle bar forms loop pile tufts while the second needle bar forms cut pile tufts. This segmentation allows independent control of each needle bar to achieve precise intermixed cut and loop pile patterns without requiring complex integrated mechanisms.
Solution Approach 2:
The patent employs dynamic control of yarn feed mechanisms that can independently adjust yarn supply to each needle bar. The yarn feed mechanisms respond to controller signals to vary yarn feed rates, enabling dynamic formation of different tuft types in sequence or combination, thereby achieving precise pattern control through dynamic coordination rather than static mechanical complexity.
Data Source
AI summary
A system and method for forming patterned tufted fabrics such as carpets, including the formation of patterns having cut pile and loop pile tufts therein. The system includes a pair of needle bars each carrying a series of needles to which a plurality of yarns are fed. Cut pile hooks are arranged along a cut pile side of a tufting zone, in a position to engage the needles of one of the needle bars, while loop pile loopers are arranged along the opposite loop pile side of the tufting zone, in a position to engage the needles of the other one of the needle bars. A backing material is fed through the tufting zone, and as loop pile tufts of yarns are formed in the backing material, the needles mounted along a needle bar extending along the cut pile side of the tufting zone can be shifted to an off-gauge position, with the yarn feed to these needles further being controlled, to substantially prevent engagement and pick-up of the yarns carried by such needles by the cut pile hooks.