Movable Yarn Finger for Plated Knitting Precision
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Solution Overview
Problem
Circular hosiery knitting machines struggle to maintain precise positioning of two yarns during plated knitting, leading to defects in the finished product due to yarn rotation and interference, which reduces productivity and quality.
Innovation Solution
A double cylinder circular hosiery knitting machine equipped with a yarn finger system featuring a second yarn finger with an elongated body and a dispensing end that can move laterally and perpendicularly to the needle cylinder, allowing precise control of the reinforcement yarn's position, reducing interference and maintaining correct yarn arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional yarn feeding is used in plated knitting, then the machine structure is simple, but the yarn positioning precision deteriorates due to rotation and interference
Solution Approach 1:
The yarn finger is divided into a stationary body and a movable dispensing end, allowing independent control of the dispensing position to maintain yarn arrangement precision without complicating the entire structure
Solution Approach 2:
The dispensing end of the yarn finger is made movable along the tangent direction of the needle cylinder, enabling dynamic adjustment of yarn dispensing position to compensate for rotation and maintain precise yarn positioning during knitting operation
2Manufacturing precision
If the dispensing end of the second yarn finger is made movable to improve yarn positioning, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The dispensing end is made movable along the tangent direction of the needle cylinder through an actuation mechanism, enabling precise control of reinforcement yarn positioning while maintaining a relatively simple overall structure
Solution Approach 2:
The position parameter of the dispensing end is made variable along the tangent direction, allowing adjustment of yarn dispensing location to prevent interference and maintain precise yarn arrangement during the knitting process
Data Source
AI summary
A circular hosiery knitting machine, particularly of the double cylinder type, with yarn finger for plated knitting, comprising at least one needle cylinder and a first yarn finger for dispensing a base yarn and a second yarn finger for dispensing a reinforcement yarn; the dispensing end of the body of the second yarn finger can move on command with respect to the remaining part of the body of the second yarn finger, on a plane that is substantially perpendicular to the axis of the needle cylinder, along a direction that is substantially parallel to the tangent to the needle cylinder in the grip point, by needles, of a reinforcement yarn dispensed by the second yarn finger.