Net-like Thread Arrangement Production with Auxiliary Belt Control
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Solution Overview
Problem
Existing devices for producing net-like scrims face issues with irregularities in the distance between transverse thread loops and fluctuations in the network pattern due to synchronization challenges of rotor arm and cross thread depositing worm speeds, leading to quality defects in the scrim.
Innovation Solution
The introduction of upper and lower pairs of endless belts as auxiliary devices to control the placement of transverse thread loops, ensuring consistent tension and even distribution, which helps in maintaining a homogeneous network pattern by clamping and transporting the threads between these belts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the rotor arm and cross thread depositing worm rotate at synchronized speeds, then continuous and even unwinding of transverse thread is achieved, but irregularities in distance between transverse thread loops occur due to synchronization challenges
Solution Approach 1:
The patent introduces guide rollers as intermediary elements that mediate between the cross thread depositing worm and the transverse thread loops. These guide rollers control the path and tension of the transverse thread, ensuring consistent spacing between loops while reducing the direct impact of synchronization variations on the final product quality.
2Manufacturing precision
If rotor arm speed and cross thread depositing worm speed are carefully synchronized, then even distribution of transverse thread loops is achieved, but quality defects still occur due to speed fluctuations
Solution Approach 1:
The patent employs variable speed control mechanisms that allow dynamic adjustment of rotational speeds during operation. By changing speed parameters in real-time based on feedback from sensors monitoring thread loop placement, the system maintains uniform network patterns even when synchronization challenges arise, without requiring overly complex fixed-speed control systems.
3Productivity
If transverse thread is fed through rotating cross thread depositing worms, then net-like scrim is produced, but irregularities in network filament structure occur
Solution Approach 1:
The patent incorporates feedback mechanisms including sensors that monitor the position and spacing of transverse thread loops as they are deposited. This real-time feedback is used to adjust operational parameters such as rotational speed and thread feed rate, ensuring consistent network filament uniformity while maintaining continuous production without interruptions.
Data Source
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AI summary
The invention relates to a device (10) for producing a net-like thread arrangement with intersecting longitudinal (3, 3a, 3b) and transverse threads (2), comprising: at least one rotor arm (5) with a transverse thread laying device (4) and two transverse thread placement screws (1) which are arranged at a distance to each other in the transverse thread placement direction (y), receive loops (2´) of the transverse thread (2) fed by the rotor arms (5) in the threads of the screws, and release the loops at the free ends (1a) of the screws and place same transversely to the longitudinal threads (3, 3a, 3b). According to the invention, at least one auxiliary device for controlling the placement of the transverse thread loops (2´) is provided in the region of the free ends (1a) of the transverse thread placement screws (1). The auxiliary device comprises a left and a right pair of closed continuous belts (30, 31) which can be oriented such that in each pair, a first continuous belt (30) is fed onto a transverse thread loop (2´) to be placed from above and a second continuous belt (31) is fed onto said transverse thread loop from below, said continuous belts enclosing the transverse thread loop (2´) between one another in a force-fitting manner. The continuous belts (30, 31) further transport the transverse thread loops (2´) enclosed between the belts in a controlled manner and place the loops at precisely defined distances, whereby a highly uniform net-like thread arrangement is produced.