Condenser Passage Groove Geometry for Ribbon Swelling Control

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Solution Overview

Problem

Traditional condensers for fibre ribbons in spinning machines face issues with controlling ribbon swelling during stopping and restarting, clogging, mechanical stress, and inflexibility in handling varying fibre types and thread counts, leading to defects and increased operational complexity.

Innovation Solution

A condenser device with a double V or U-shaped passage groove configuration, featuring diverging arms and an open section that allows the ribbon to self-adjust and expand, eliminating the need for active control systems and enabling universal use across different fibre types and thread counts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If a closed section condenser is used to collect and compress fibres, then fibre collection and compression are improved, but ribbon swelling control during stopping and restarting deteriorates

Engineering Contradiction:

Improvefibre collectionVSAvoidribbon swelling control

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The condenser section is made dynamically adjustable through a movable wall that can change the cross-sectional area of the passage groove. This allows the condenser to adapt its geometry in real-time: maintaining a closed configuration during normal operation for effective fibre collection, and opening during stopping/restarting to accommodate ribbon swelling and prevent clogging.

Inventive Principle:

Principle #15Dynamics

2Stress or pressure

If a closed section condenser is used to compress fibres, then compression efficiency is improved, but ribbon accommodation and self-adjustment deteriorates

Engineering Contradiction:

Improvefibre compressionVSAvoidribbon accommodation

Core Design Contradiction:

Stress or pressureVSAdaptability or versatility

Solution Approach 1:

The movable wall enables the condenser to switch between closed and open configurations, providing both strong compression during normal operation and ribbon accommodation during stopping/restarting. This dynamic adaptability resolves the contradiction between maintaining compression efficiency and allowing ribbon self-adjustment.

Inventive Principle:

Principle #15Dynamics

3Quantity of substance

If the condenser section is closed to prevent fibre escape, then fibre containment is improved, but operational flexibility for different fibre types and thread counts deteriorates

Engineering Contradiction:

Improvefibre containmentVSAvoidoperational flexibility

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The movable wall allows the condenser to adjust its geometry dynamically, providing effective fibre containment during normal operation while enabling configuration changes for different fibre types and thread counts. This eliminates the need for multiple dedicated condensers and improves operational flexibility.

Inventive Principle:

Principle #15Dynamics

4Reliability

If steel plugs are added to prevent abrasion, then wear protection is improved, but device complexity increases

Engineering Contradiction:

Improvewear protectionVSAvoidconstruction complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The steel plugs are completely removed from the design. Instead of adding protective elements, the invention uses the movable wall mechanism itself to prevent contact between the ribbon and condenser walls during stopping/restarting, thereby eliminating wear without requiring additional protective components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The movable wall automatically prevents ribbon contact with condenser walls through its own motion during stopping/restarting operations. This self-protecting mechanism eliminates the need for separate steel plug components and simplifies the overall device structure.

Inventive Principle:

Principle #25Self-service

5Quantity of substance

If the outlet section is closed to prevent fibre escape, then fibre containment is improved, but operator access and monitoring deteriorates

Engineering Contradiction:

Improvefibre containmentVSAvoidoperator access

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The movable wall can be opened by the operator when needed, providing direct access to the condenser for ribbon insertion, monitoring, and maintenance. During normal operation, the wall remains closed to contain fibres, but opens on demand to improve operator access and monitoring capability.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4249652A1Condenser device for fibre ribbon, spinning head comprising such device, and spinning machine comprising such spinning head

Publication Date: 2023.09.27 SAVIO MACCHINE TESSILI SPA

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AI summary

A condenser device (12) for fibre ribbon (14) for spinning head (16), comprises at least one passage groove (18, 19) arranged with a mouth (20), an outlet (22), and a sliding surface (24) comprised between said mouth (20) and said outlet (22). The sliding surface (24) converges from the mouth (20) towards the outlet (22). The sliding surface (24) is arranged with a sliding bottom (26) and sliding side walls (28, 30), wherein the sliding side walls (28, 30) diverges from each other in the opposite direction with respect to said sliding bottom (26).