Patterned Tufting Machine Needle Support for Long-Stroke Precision
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Solution Overview
Problem
Existing tufting machines face challenges in accurately forming patterned tufted products with increased pile heights and multiple colors due to reduced control over needle shifting, increased vibrational forces, and inefficiencies in yarn feeding, leading to labor-intensive and inaccurate design application processes.
Innovation Solution
A tufting machine with a drive system that includes needle stroke support assemblies and a control system to maintain linear motion of push rods, combined with a yarn feed and selection system, enabling precise control over needle reciprocation and yarn insertion, allowing for varied pile heights and colors without expanding gauge spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If needle stroke length is increased to form longer tufts, then pile height is improved, but control over needle motion stability deteriorates
Solution Approach 1:
The needle stroke support assembly segments the support function into multiple components: a stationary support structure and a movable follower component. This segmentation allows the system to provide distributed support along the needle stroke path, maintaining stability even as overall stroke length increases.
Solution Approach 2:
The follower component acts as an intermediary between the needle and the stationary support structure. It transfers and distributes the support forces along the needle stroke, reducing vibration and maintaining motion stability without constraining the extended stroke length.
2Productivity
If operational speed is increased to improve productivity, then output is improved, but manufacturing precision deteriorates
Solution Approach 1:
The needle stroke support assembly pre-establishes stable motion pathways and support points before the needle begins its reciprocating motion. This preliminary positioning ensures that even at high speeds, the needle follows a precise and consistent stroke path, maintaining pattern alignment accuracy.
3Productivity
If yarn feed rate is increased to match needle speed, then productivity is improved, but yarn selection control deteriorates
Solution Approach 1:
The yarn selection system uses the needle's own reciprocating motion to control yarn feeding. As the needle reciprocates, it automatically selects and feeds the appropriate yarn color for each stitch location, eliminating the need for separate complex selection mechanisms and maintaining precision at high feed rates.
Data Source
AI summary
A system, apparatus and methods for forming tufted products can include a tufting machine for forming patterned tufted products, such as carpets, rugs, and artificial grass or turf product with logos of other designs including multiple colors of yarns integrated therein. The tufting machine can include a series of hollow needles arranged along a needle bar at a gauge spacing and can receive a series of different color and/or types of yarns from a yarn feed system. A yarn selection system can be controlled to selectively hold back or retract yarns from the needles. The needles will be reciprocated into and out of a backing to deliver a series of yarns into the backing and can be engaged by corresponding knives to form tufts of yarns.