Yarn Forming Element Snap Connection for Air-Jet Spinning

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Solution Overview

Problem

Existing yarn-forming elements for air-jet spinning machines are not easily adaptable or maintainable for different fiber materials, and the spinning tip, which is prone to wear, requires complex replacement procedures.

Innovation Solution

A yarn-forming element with a snap connection between the spinning tip and the base body, allowing for easy manual detachment and reattachment without tools, utilizing a sleeve and snap ring mechanism that provides a secure yet easily releasable connection, enabling quick replacement of the spinning tip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the spinning tip is made replaceable to improve adaptability and reduce wear, then the adaptability and maintainability are improved, but the device complexity increases due to the need for connection mechanisms

Engineering Contradiction:
Improveadaptability to different fiber materialsVSAvoidstructure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The yarn-forming element is divided into two separate parts: a base body and a spinning tip. The spinning tip can be detached and replaced independently from the base body, allowing adaptation to different fiber materials and replacement when worn, without replacing the entire yarn-forming element.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connection between the spinning tip and base body is designed to be dynamically changeable - it can be securely attached during operation and easily detached when needed. The snap connection provides a stable connection during spinning while allowing quick replacement when the spinning tip wears out or when changing fiber materials.

Inventive Principle:
Principle #15Dynamics

2Reliability

If the spinning tip is securely attached to ensure operational reliability, then the reliability is improved, but the ease of repair deteriorates due to difficult replacement

Engineering Contradiction:
Improveattachment securityVSAvoidspinning tip replacement
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The traditional mechanical screw or clamp connection is replaced with a snap connection mechanism. The snap connection uses elastic deformation of functional elements (such as elastic hooks or clips) to engage with corresponding features on the base body, providing secure attachment during operation while allowing easy manual detachment without tools.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The snap connection is designed to be self-securing during operation - the elastic functional elements automatically engage with the base body when the spinning tip is attached, providing reliable retention without additional fastening steps. Meanwhile, the same elastic elements allow easy manual release by pulling apart in the longitudinal direction.

Inventive Principle:
Principle #25Self-service

3Ease of operation

If a tool-free replacement system is implemented to improve ease of operation, then the ease of operation is improved, but the reliability may deteriorate due to potential connection issues

Engineering Contradiction:
Improvereplacement simplicityVSAvoidconnection stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The snap connection acts as an intermediary mechanism between the spinning tip and base body. It provides a simple manual connection interface that is easy to operate (pull apart in longitudinal direction) while internally providing stable connection through elastic functional elements that engage with corresponding features, ensuring reliable attachment during high-speed spinning operation.

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates easy and tool-free replacement of the spinning tip, improving adaptability to various fiber materials and reducing maintenance complexity while ensuring secure attachment during operation.

Implementation Method 1

When the spinning tip and base body are connected, at least one functional element deforms elastically and finally engages in a corresponding further functional element

Methodology Applied
Scientific EffectElastic deformation: Elasticity

Data Source

PatentEP3293294B1Yarn forming element and spinning nozzle for an air-jet spinning machine
Publication Date: 2020.10.28 MASCHINENFABRIK RIETER AG
  • EP3293294B1 patent drawingFigure 1
  • EP3293294B1 patent drawingFigure 2
  • EP3293294B1 patent drawingFigure 3

AI summary

The invention relates to a yarn forming element (1) for an air spinning machine used to produce yarn (2) from a fiber composite (3) by means of a vortex airflow, wherein the yarn forming element (1) has a spinning tip (4) with an inlet opening (5) for fibers of the fiber composite (3), wherein the yarn forming element (1) has a base body (6) connected to the spinning tip (4), and wherein the yarn forming element (1) has a discharge channel (7) for yarn (2) produced in the region of the spinning tip (4), which extends through the spinning tip (4) and the base body (6) and opens into an outlet (8) through which the yarn (2) produced in the region of the spinning tip (4) can exit the yarn forming element (1). According to the invention, it is proposed that the spinning tip (4) and the base body (6) are connected to each other by means of at least one snap connection.Furthermore, a spinneret (13) with a corresponding yarn forming element (1) is proposed.