Mechanical Wedge for Interrupting Roving Feed in Core Yarn Spinning
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Solution Overview
Problem
Existing devices for interrupting the feed of roving in core yarn spinning machines either require specialized maintenance, increasing costs, or involve manual labor to resume spinning after filament breakage, reducing efficiency.
Innovation Solution
A mechanical device with a wedge mechanism that interrupts the roving feed by acting on the rollers rather than the roving itself, allowing automatic resumption of spinning once the issue is resolved, using a spring-activated slide and lever system to position the wedge between feed rollers and a sensor for breakage detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical sensors and electromagnetic devices are used to detect filament breakage and interrupt roving feed, then breakage detection reliability is improved, but maintenance complexity and operational costs increase due to requiring specialized personnel
Solution Approach 1:
The patent replaces complex electrical sensing systems and electromagnetic devices with a simple mechanical detection system. A light source positioned near the filament and a reflective surface create a light path that is mechanically interrupted when the filament breaks, causing a mechanical lever to move and trigger the roving feed interruption without requiring electrical sensors or specialized maintenance personnel.
Solution Approach 2:
The invention uses simple, inexpensive mechanical components such as a light source, reflective surface, and lever mechanism instead of expensive electrical sensors. These basic mechanical elements are easy to manufacture, install, and maintain, eliminating the need for specialized personnel while maintaining reliable breakage detection functionality.
2Reliability
If the roving feed is interrupted by cutting the roving at the feed roller intake, then filament breakage response is achieved, but productivity decreases due to manual reinsertion operations required to resume spinning
Solution Approach 1:
The patent positions a light source and reflective surface in advance to create a detection zone before the roving feed rollers. When the filament breaks, the system预先 (in advance) prepares the mechanical lever to move and the roving feed to be interrupted, enabling automatic detection and response without requiring manual intervention to resume the process.
Solution Approach 2:
The mechanical system automatically detects filament breakage through the light path interruption and self-activates the roving feed interruption mechanism. The system serves itself by converting the optical signal change into mechanical action without requiring external control or manual reinsertion operations, thereby maintaining continuous productivity.
3Ease of operation
If a wedge mechanism acts on feed rollers to interrupt roving feed, then ease of operation is improved by eliminating manual reinsertion, but device complexity increases due to the mechanical activation system
Solution Approach 1:
The patent merges the detection function (light source and reflective surface) with the actuation function (lever and wedge mechanism) into a single integrated mechanical system. The light path interruption directly drives the lever movement, which in turn activates the wedge to interrupt roving feed, combining sensing and actuation in one simple mechanical chain without requiring separate control systems.
Solution Approach 2:
The lever acts as an intermediary element that converts the optical signal change (light path interruption) into mechanical motion (wedge displacement). This simple mechanical mediator translates the detection event into the appropriate action (roving feed interruption) without requiring complex control mechanisms, maintaining ease of operation while achieving automatic response.
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
Enables efficient and cost-effective interruption and resumption of the spinning process without manual roving insertion, as the drafting rollers separate or cut the roving, allowing the free end to be automatically directed back into the spinning process.
Implementation Method 1
a spring-activated slide and lever system to position the wedge between feed rollers
Implementation Method 2
an electrical sensor which monitors the passage of the filament, detects the breakage
Implementation Method 3
a wedge arranged for its insertion, in an active position, between a pair of roving feed rollers, said wedge being able to interrupt the feed of the roving by its action on the rollers
Data Source
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AI summary
A device (1) for the INTERRUPTING of the feed of a roving (12) when breakage of a filament (11) occurs during the process of spinning core yarn, characterised in that it comprises a wedge (2) arranged to be inserted, in its active position, between a pair of roving (12) feed rollers (6a, 6b), said wedge (2) enabling the INTERRUPTING of the feed of the roving (12) by acting on said rollers (6a, 6b); said device (1) featuring a mechanism (3, 4, 5, 7) to activate the displacement of the wedge (2) towards said active position when the breakage occurs. A procedure for the INTERRUPTING of the feed of a roving (12) when breakage of a filament (11) occurs during the process of spinning core yarn, comprising the stage of separating the roving (12) feed rollers (6a, 6b) by strictly mechanical means (2) to grasp the roving (12) and to halt its feed when a breakage of the filament (11) occurs.