Coving Hood Suction for Combing Machine Fiber Dust Control

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Solution Overview

Problem

Existing combing machines face issues with fiber flight and dust entering the combing area, leading to contamination of the combed fibers and increased maintenance requirements.

Innovation Solution

A combing machine design featuring a suction channel below the combing point, a swiveling cover with integrated suction, and a suction nozzle for cleaning the upper trigger roller, which effectively captures fibers and dust, reducing contamination and maintenance needs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a cover hood is used to shield the combing station, then fiber fly from the environment is prevented, but fiber dust generated during combing accumulates below the cover and contaminates the combed fiber material

Engineering Contradiction:

Improvefiber fly from environmentVSAvoidfiber dust accumulation

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes the harmful fiber dust and fly from the combing station area using a suction system. The suction channel with extraction openings captures fibers and dust at the source, preventing their accumulation and redeposition onto the combed material, thus resolving the contradiction between shielding and contamination prevention

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs a pneumatic suction system to remove fiber dust and fly. The suction channel creates negative pressure to extract airborne fibers and dust particles from the combing station, effectively addressing the contamination issue while maintaining the protective cover hood

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Object-affected harmful factors

If scrapers are applied to roller surfaces to capture adhering fibers, then fiber transfer to fiber material is reduced, but the rollers and scrapers require regular maintenance and cleaning

Engineering Contradiction:

Improvefiber adhesion to rollersVSAvoidmaintenance of scrapers and rollers

Core Design Contradiction:

Object-affected harmful factorsVSEase of repair

Solution Approach 1:

The patent extracts fibers from the air and surfaces using the suction system before they can adhere to rollers and other components. By removing fibers from the environment through suction, the system reduces the amount of fiber that would otherwise accumulate on rollers and scrapers, thereby reducing maintenance requirements

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The suction channel acts as an intermediary between the fiber source and the rollers/scrapers. It intercepts and removes fibers from the air stream before they can deposit on the rollers, reducing the burden on mechanical scrapers and decreasing maintenance frequency

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the cover hood is fixed to provide continuous suction, then fiber removal is effective, but access to the combing point for maintenance is restricted

Engineering Contradiction:

Improvefiber flyawaysVSAvoidaccess to combing point

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent makes the cover hood dynamic and movable rather than fixed. The hood can be opened or adjusted to provide access to the combing point for maintenance while maintaining suction capability. This dynamic design allows operators to access components when needed while preserving continuous fiber removal functionality

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The suction system is segmented into multiple components including the movable cover hood, suction channel, and extraction openings. This segmentation allows the hood to be independently moved or opened for maintenance access while the suction channel remains positioned to continue removing fibers from the combing area

Inventive Principle:

Principle #1Segmentation

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

The proposed solution efficiently captures fibers and dust, minimizing contamination of the combed fibers and reducing the maintenance burden on the combing machine by ensuring that fibers are not redeposited into the combed fiber stream.

Implementation Method 1

a suction channel running below the combing station in the machine frame

Methodology Applied

Scientific EffectSuction: Suction

Implementation Method 2

the negative pressure prevailing in the extraction duct is sufficient for the operation of the extractor

Methodology Applied

Scientific EffectNegative pressure: Pressure Drop

Data Source

PatentEP4253617B1Suction of a combing position in a combing machine

Publication Date: 2025.05.07 RIETER CZ AS

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AI summary

The invention relates to a combing machine with a machine frame (1) and with at least one combing section (2), with a suction channel (3) extending below the combing section (2) in the machine frame (1), and with a cover hood (4) pivotably held on the machine frame (1) and extending over the combing section (2), wherein the combing section (2) comprises at least one gripper unit (5), a round comb (6), a fixed comb (7), a feed cylinder (8), and a pair of take-off rollers (10), the take-off roller pair (10) consisting of a lower take-off roller (11) and an upper take-off roller (12) provided with a scraper (13). The combing section (2) is provided with a suction system, the suction system being attached to the cover hood (4) and connected to the suction channel (3) via a coupling (31).