Dual Axially-Moving Grinding Rollers for Balanced Textile Finishing
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Solution Overview
Problem
Existing grinding apparatuses are limited in their ability to effectively grind both weft and warp threads of textile materials without increasing pressure, rotation speed, or inducing unmanageable vibrations, and they often accentuate defects in the material or apparatus components.
Innovation Solution
The apparatus features two rotating grinding rollers with axes parallel to each other and transverse to the textile feed direction, moving axially in synchronous phase opposition to compensate for vibrations and achieve balanced grinding, using synchronized motor systems, transmission belts, or pneumatic/hydraulic actuators to adjust speed and pressure for various textile materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the speed of rotation of the grinding roller is increased to improve productivity, then the grinding effect on the textile material is enhanced, but the aggressiveness of the action creates damage to the textile material
Solution Approach 1:
The invention divides the grinding function into two separate rollers instead of using one high-speed roller. Each roller operates at a lower, safer speed while collectively achieving the desired grinding effect through their combined action on the textile material passing between them.
Solution Approach 2:
The invention introduces axial movement of the grinding rollers in addition to their rotation, creating a two-dimensional grinding action (rotation + axial displacement). This allows effective grinding of both weft and warp threads without increasing rotational speed, thereby avoiding material damage.
2Productivity
If the speed of the to and fro device is increased to grind warp threads as well, then the grinding effectiveness is improved, but unmanageable vibrations are triggered which compromise the stability of the machine
Solution Approach 1:
The invention uses two grinding rollers that move axially in opposite directions (reciprocal phase opposition). The vibrations generated by one roller are counterbalanced by the other, eliminating unmanageable vibrations and maintaining machine stability while enabling effective grinding of warp threads.
Solution Approach 2:
The invention employs periodic axial movement of the grinding rollers in a synchronized, opposite-phase manner. This periodic action allows the rollers to grind warp threads effectively while the counterbalancing motion prevents vibration accumulation that would destabilize the machine.
3Device complexity
If a single grinding roller is used with to and fro motion, then the apparatus structure is simple, but only weft threads can be ground and not warp threads
Solution Approach 1:
The invention replaces a single grinding roller with two separate rollers, each capable of independent axial movement. This segmentation allows the system to grind both weft and warp threads, significantly improving versatility while maintaining relatively simple individual roller structures.
Solution Approach 2:
The invention makes both grinding rollers dynamically movable along their axes with synchronized, opposite-phase motion. This dynamic configuration enables the rollers to effectively engage with both weft and warp threads, expanding the grinding coverage beyond what a static or single-roller system could achieve.
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 allows for effective grinding of both weft and warp threads without causing instability, enabling precise control over grinding results and reducing vibrations, thus improving the finishing process for a range of textile materials.
Implementation Method 1
the two rotating grinding rollers are also mobile axially, synchronously but in reciprocal phase opposition... the phase opposition of their movements means that the vibrations induced on the structure of the machine to are compensated and substantially eliminated
Implementation Method 2
abrasive brushes or rotating rollers or cylinders, covered on their external surface with slightly abrasive paper which, by scraping the surface of the textile material, produces a more or less evident effect
Implementation Method 3
by scraping the surface of the textile material
Data Source
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AI summary
An apparatus for finishing a textile material, comprises at least two rotating grinding rollers (25, 26), disposed facing each other with the respective axes (Al, A2) parallel to each other and transverse with respect to the direction of feed of the textile material. The grinding rollers (25, 26) are also mobile axially.