Warp Knitting Machine Bar Sections Phase Difference

Solution Overview

Problem

Warp knitting machines face a challenge in achieving high productivity while maintaining a simple construction, as increasing the working width requires significant forces that must be absorbed by the machine frame, making it costly and complex to compensate for these forces.

Innovation Solution

The use of at least two main shaft sections with an angular offset relative to each other, driven by drive train sections with a phase difference, allows for the distribution of forces over time, reducing the overall load on the supporting structure and enabling higher machine speed without the need for complex force compensation systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the working width of the machine is increased, then productivity is improved, but the forces required to drive the bar assembly increase, requiring complex force compensation systems

Engineering Contradiction:

ImproveproductivityVSAvoidcomplex construction

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The bar assembly is divided into at least two bar sections (first bar section and second bar section) that are arranged side by side. Each bar section is driven by separate drive train sections with different phase positions, allowing the forces to be distributed and compensated independently, thereby enabling increased working width without requiring complex overall force compensation systems.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The drive train sections are configured with different phase positions such that the forces generated by each bar section act at different times and in different directions on the supporting structure. This phase difference creates a counterbalancing effect where forces from one bar section compensate for forces from the other, reducing the net load on the machine frame and eliminating the need for elaborate force compensation mechanisms.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Productivity

If the working width of the machine is increased, then productivity is improved, but the machine frame requires elaborate design and complex construction

Engineering Contradiction:

ImproveproductivityVSAvoidmachine frame strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The bar assembly is divided into at least two bar sections (first bar section and second bar section) that are arranged side by side. Each bar section is driven by separate drive train sections with different phase positions, allowing the forces to be distributed and compensated independently, thereby enabling increased working width without requiring complex overall force compensation systems.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The drive train sections are configured with different phase positions such that the forces generated by each bar section act at different times and in different directions on the supporting structure. This phase difference creates a counterbalancing effect where forces from one bar section compensate for forces from the other, reducing the net load on the machine frame and eliminating the need for elaborate force compensation mechanisms.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

3Productivity

If the machine speed is increased, then productivity is improved, but the forces acting on the supporting structure increase simultaneously

Engineering Contradiction:

Improvemachine speedVSAvoidforces on supporting structure

Core Design Contradiction:

ProductivityVSForce

Solution Approach 1:

The drive train sections operate with different phase positions, creating a periodic distribution of forces over time. As the bar sections are raised and lowered at different phases, the forces are distributed across different time intervals rather than acting simultaneously, allowing higher machine speeds without proportionally increasing the peak forces on the supporting structure.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP3859067B1Warp knitting machine

Publication Date: 2023.08.02 KARL MAYER STOLL R&D GMBH

Figure 1
Figure 2

AI summary

A warp knitting machine (1) is described, comprising a longitudinally oriented bar arrangement driven by a drive train. The bar arrangement is divided into at least two adjacent bar sections (2, 3), and the drive train acts on both bar sections (2, 3). The aim is to achieve high productivity of the warp knitting machine in a simple manner. For this purpose, the drive train comprises a number of drive train sections corresponding to the number of bar sections (2, 3), with the drive train sections acting on the bar sections (2, 3) at different phase angles, exhibiting a phase difference.