Cross-Winding Machine Bobbin Transport Control

Solution Overview

Problem

The existing method for operating automatic cheese winding machines often results in production losses due to a temporary standstill of the ring spinning machine when transport plates equipped with empty bobbin tubes are not returned in time, primarily caused by prolonged thread breaks or controlled thread cuts during the rewinding process.

Innovation Solution

A method where the central control unit of the cross-winding machine continuously monitors the number of empty bobbin tubes and activates a reloading station to ensure sufficient transport plates are available for the ring spinning machine by replacing spinning cops with empty bobbin tubes, preventing production delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the cross-winding machine processes spinning cops continuously, then productivity is improved, but thread breaks and controlled thread cuts occur causing production losses

Engineering Contradiction:

Improvecross-winding productivityVSAvoidproduction continuity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system implements a feedback mechanism where the control unit continuously monitors the number of processed spinning cops and the availability of empty bobbin tubes. Based on this feedback, the system predicts potential shortages and activates the reloading station in advance to prevent production interruptions, thus maintaining both high productivity and production continuity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The reloading station performs preliminary actions by preparing and positioning empty bobbin tubes before they are actually needed. The control unit calculates the expected number of empty bobbin tubes based on the spinning cop processing rate and activates the reloading station in advance to ensure sufficient empty tubes are available, preventing thread breaks and production losses.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the ring spinning machine waits for empty bobbin tubes to be returned, then production continuity is maintained, but temporary standstills occur causing loss of time

Engineering Contradiction:

Improveproduction continuityVSAvoiddoffing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The reloading station performs preliminary actions by preparing and positioning empty bobbin tubes before they are actually needed. The control unit calculates the expected number of empty bobbin tubes based on the spinning cop processing rate and activates the reloading station in advance to ensure sufficient empty tubes are available, preventing thread breaks and production losses.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system ensures continuous operation of the ring spinning machine by maintaining a steady supply of empty bobbin tubes. The reloading station operates continuously or periodically to replenish empty tubes, and the control unit coordinates the timing to ensure tubes are available exactly when needed, eliminating standstills during doffing operations.

Inventive Principle:

Principle #20Continuity of useful action

3Manufacturing precision

If transport plates with spinning cops are held at the cross-winding machine, then winding quality is ensured, but insufficient empty bobbin tubes are returned causing production losses

Engineering Contradiction:

Improvewinding qualityVSAvoidoverall production rate

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The system implements a feedback mechanism where the control unit continuously monitors the number of processed spinning cops and the availability of empty bobbin tubes. Based on this feedback, the system predicts potential shortages and activates the reloading station in advance to prevent production interruptions, thus maintaining both high productivity and production continuity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The reloading station operates autonomously under control unit guidance to replenish empty bobbin tubes. The system self-regulates by monitoring its own inventory levels and automatically activating the reloading station when thresholds are approached, ensuring continuous operation without external intervention while maintaining winding quality.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4253618A1Method and device for operating an automatic cross-winding machine connected to a ring spinning machine by a bobbin and bobbin transport system

Publication Date: 2023.10.04 RIETER AUTOMATIC WINDER GMBH

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AI summary

The invention relates to a method or device for operating a cross-winding machine (1) which is connected to a ring spinning machine (4) via a bobbin and sleeve transport system (14).According to the invention, it is provided that during the spinning process of a ring spinning machine (4), the current number of spinning heads (3) unwound at the workstations (2) of the cross-winding machine (1), which are returned to the ring spinning machine (4) as empty bobbins (7) on transport plates (6), is constantly recorded, and furthermore, it is determined how many of these empty bobbins (7) arranged on transport plates (6) will still be returned until the next winding process of the ring spinning machine (4), and that if the production process at the cross-winding machine (1) suggests that a production loss will occur due to a lack of transport plates (6) equipped with empty bobbins (7), a special transfer station (28) intervenes in the material flow of the cross-winding machine (1) to provide support.