Automatic Temple Position Switching Mechanism for Loom Weave Section Transitions
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Solution Overview
Problem
Rapid displacement of the temple from the operating to the standby position in a loom causes a sharp decrease in warp tension, leading to warp shedding faults and reduced fabric quality when switching from high to low weft density weave sections.
Innovation Solution
Implementing an automatic temple position switching mechanism that detects the weaving length and starts moving the temple before the set weaving length is reached, allowing it to transition to the standby position after multiple weft-insertion periods, thereby reducing tension variations and maintaining fabric quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the temple is rapidly displaced from the operating position to the standby position, then the temple can quickly switch between weave sections, but the warp tension decreases sharply causing warp insertion faults
Solution Approach 1:
The patent applies dynamics by making the temple displacement speed variable rather than constant. The control system adjusts the displacement speed based on the temple's current position and the required destination, ensuring the temple reaches the target position at an appropriate timing without causing excessive tension variation. This dynamic speed adjustment resolves the contradiction between fast switching and weaving reliability.
2Loss of time
If the temple is displaced before the set weaving length is reached, then the temple can be positioned in time for the next weave section, but the warp tension varies during weft insertion periods
Solution Approach 1:
The patent applies preliminary action by initiating temple displacement before the current weave section's set weaving length is completely reached. The control system calculates the optimal start timing based on the remaining weaving length and the time required for the temple to reach its destination. This allows the temple to be positioned in time for the next weave section while minimizing disruption to the current weaving process.
Solution Approach 2:
The patent applies periodic action by scheduling the temple displacement to occur during specific periods within the weaving cycle. The control system determines appropriate displacement timing based on the weaving length and weft insertion periods, ensuring that displacement occurs at intervals that minimize impact on warp tension stability and fabric quality.
3Object-affected harmful factors
If the temple remains at the operating position during low density weave sections, then crimp prevention is maintained, but the warp and weft positions become disarranged due to excessive binding force
Solution Approach 1:
The patent applies local quality by making the temple's presence and binding force location-dependent. The control system determines whether the temple should be at the operating position or standby position based on the local characteristics of the weave section (high density requiring crimp prevention vs. low density requiring minimal binding). This localized control of temple position ensures appropriate treatment for each section's specific requirements.
Data Source
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AI summary
Provided is a method of driving a temple (41) of a temple device (40) including an automatic temple position switching mechanism (42), the temple device (40) being used for a loom that successively weaves a fabric (2a) having two or more weave sections with different weft densities in accordance with a set weaving length that has been set, the temple (41) being displaceable between two positions, the automatic temple position switching mechanism (42) automatically switching a position of the temple (41) between two positions that are an operating position and a standby position, the method being performed when displacing the temple (41) from the operating position toward the standby position in accordance with switching between the weave sections, the method including successively detecting a weaving length of a weave section that is being woven, and displacing the temple (41) in accordance with a preset operation mode including a movement start timing of the temple (41) such that movement of the temple (41) is started before the detected weaving length reaches the set weaving length and such that the temple (41) reaches a non-operating position after a plurality of weft-insertion periods.