Knitting Tool Bar Composite Profile Elements

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Solution Overview

Problem

Existing knitting tool bars face challenges in achieving a high mechanical load capacity while maintaining a low weight and minimizing susceptibility to vibrations, which is crucial for efficient operation in textile machines.

Innovation Solution

The design incorporates two profile elements with varying cross-sectional arrangements and a cohesive connection, including a wire for additional stability, allowing for adaptable and flexible attachment of circuit boards, which are made from materials like stainless steel or sheet metal to optimize mechanical strength and reduce weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the knitting tool bar is made from lightweight materials such as magnesium, aluminum, or fiber-reinforced plastic to minimize mass, then the weight is reduced and forces acting on the bar are minimized, but the mechanical load capacity and susceptibility to vibrations are compromised

Engineering Contradiction:
Improveweight of knitting tool barVSAvoidmechanical load capacity
Core Design Contradiction:
Weight of moving objectVSStrength

Solution Approach 1:

The knitting tool bar combines aluminum alloy (lightweight material) with stainless steel profile elements (high strength material) to create a composite structure. The aluminum base body provides low weight while the stainless steel profile elements provide high mechanical strength and vibration resistance, resolving the contradiction between weight reduction and maintaining load capacity.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The knitting tool bar is divided into functional segments: the aluminum alloy base body for weight reduction and the stainless steel profile elements for structural strength. This segmentation allows each material to be optimized for its specific function, achieving both low weight and high mechanical load capacity simultaneously.

Inventive Principle:
Principle #1Segmentation

2Weight of moving object

If the knitting tool bar is made from lightweight materials to reduce mass, then acceleration and deceleration forces are minimized reducing wear, but the susceptibility to vibrations increases

Engineering Contradiction:
Improvemass of knitting tool barVSAvoidsusceptibility to vibrations
Core Design Contradiction:
Weight of moving objectVSObject-affected harmful factors

Solution Approach 1:

The composite structure of aluminum alloy base body with stainless steel profile elements provides both low weight for reduced acceleration forces and high vibration resistance. The stainless steel profile elements act as vibration-dampening structures, eliminating the typical vibration susceptibility of lightweight materials.

Inventive Principle:
Principle #40Composite materials

3Strength

If profile elements with varying cross-sectional arrangements are used to adapt to different mechanical conditions and vibrations, then the mechanical load-bearing capacity and vibration resistance are improved, but the device complexity increases

Engineering Contradiction:
Improvemechanical load-bearing capacityVSAvoidstructural complexity of profile elements
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The profile elements feature varying cross-sectional arrangements at different locations to adapt to local mechanical conditions and vibration patterns. This local optimization provides high load-bearing capacity and vibration resistance where needed while maintaining overall structural simplicity through the modular profile element design.

Inventive Principle:
Principle #3Local quality

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

This configuration enhances the mechanical load capacity and reduces vibration susceptibility, enabling efficient operation with minimal wear and weight, while allowing for precise positioning and easy installation in a compact space.

Implementation Method 1

the wire and the circuit boards are bonded together

Methodology Applied
Scientific EffectBonding: Adhesive

Implementation Method 2

The first profile element and the second profile element are connected to each other by a material bond. Examples of a material bond include an adhesive bond

Methodology Applied
Scientific EffectAdhesive bond: Adhesive

Implementation Method 3

Examples of a material bond include an adhesive bond, a soldered bond

Methodology Applied
Scientific EffectSoldered bond: Soldering

Implementation Method 4

Examples of a material bond include an adhesive bond, a soldered bond, or a welded connection

Methodology Applied
Scientific EffectWelded connection: Welding

Data Source

PatentEP4151789B1Warp knitting tool bar
Publication Date: 2024.12.11 KARL MAYER STOLL R&D GMBH
  • EP4151789B1 patent drawingFigure 1~2

AI summary

The present invention relates to a knitting tool bar (1) of a textile machine with a blank holder for receiving several blanks (4). The object of the invention is to propose a knitting tool bar (1) with a low weight. For this purpose, the blank holder has a first profile element (2) and a second profile element (3), wherein the first profile element (2) and the second profile element (3) are connected to each other and have a space (15) for receiving the blanks (4).