Level Cut Loop Looper Clip Assembly Spring Actuation
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Solution Overview
Problem
Conventional level cut loop hook or looper assemblies for tufting machines are limited by the speed of hydraulic actuators, require compressors for operation, and have complex connecting linkages, leading to increased costs and operational complexity.
Innovation Solution
A level cut loop looper and clip assembly with a modular structure, featuring gauging modules, pivot arms, and solenoid actuators, where clips are biased by springs to automatically switch between extended and retracted positions, allowing for selective formation of loop and cut pile tufts without the need for independent actuation of each clip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hydraulic actuators with connecting linkages are used to operate clips, then clips can be extended and retracted to control loop and cut pile formation, but the operation speed is limited by cylinder speed and the system complexity increases
Solution Approach 1:
The patent removes the hydraulic actuator and connecting linkage from the system entirely. Instead, a spring-loaded clip automatically extends and retracts through the reciprocating motion of the looper itself, eliminating the complex actuation system while maintaining clip control functionality.
Solution Approach 2:
The looper assembly performs dual functions: it both loops the yarn and automatically actuates the clip through its own reciprocating motion. The clip is spring-loaded to extend automatically during looper reciprocation without requiring separate actuation, making the system self-sufficient.
2Ease of operation
If hydraulic cylinders and compressors are used to operate clips, then clips can be controlled, but the operational cost increases due to compressor requirements
Solution Approach 1:
The patent eliminates the hydraulic cylinder and compressor from the system. The spring-loaded clip mechanism requires no external fluid power source, thereby removing the energy-consuming compressor and associated operational costs.
Solution Approach 2:
The patent replaces the hydraulic mechanical system with a simple spring-loaded mechanical system. This substitution eliminates the need for compressors and fluid power infrastructure, reducing both energy consumption and operational complexity.
3Ease of operation
If connecting linkages are used between clips and actuators, then clips can be actuated, but the system complexity and operational limitations increase
Solution Approach 1:
The patent completely removes the connecting linkage from the system. The clip is directly mounted on the looper and actuated through the looper's own reciprocating motion, eliminating the need for any intermediate linkage components.
4Adaptability or versatility
If conventional level cut loop hooks with hydraulic actuators are used, then loop and cut pile tufts can be formed, but the production speed is limited by actuator operation speed
Solution Approach 1:
The spring-loaded clip provides continuous automatic actuation throughout the looper's reciprocating cycle without interruption or speed limitation. The clip extends and retracts seamlessly with each looper stroke, enabling continuous high-speed tufting operation.
Solution Approach 2:
The looper assembly self-actuates the clip through its own motion, eliminating the speed bottleneck of external actuators. This self-service mechanism allows the system to operate at the full speed capability of the tufting machine.
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 solution enables faster and more precise operation of the tufting machine, reduces complexity and cost, and improves the consistency and production rate of loop and cut pile tufts, while minimizing interference between components.
Implementation Method 1
Each of the clips further will include a spring or other biasing member that applies a biasing force to urge their clips to the retracted position
Data Source
AI summary
A level cut loop looper or hook and clip assembly for a tufting machine includes at least one module carrying a series of level cut loop loopers or hooks. Each level cut loop looper or hook generally can include a looper body along which a clip is slidably moved. Each clip will be moved between retracted and extended positions as the level cut loop loopers or hooks are reciprocated toward and away from engagement with their associated needles of the tufting machine. Actuators can be engaged to secure the clips in their extended positions as needed to selectively form cut and loop pile tufts in a backing material.