Circular Loom Shed Forming with Pivoting Elements
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Solution Overview
Problem
Conventional circular looms require frequent maintenance, have high energy consumption, and are noisy due to numerous moving parts and control levers, leading to reduced production speed and output.
Innovation Solution
The circular loom incorporates shed-forming devices with pivoting elements connected to multiple warp thread lifting means, which receive a pivoting and lifting movement from a control cam, forming a lens-shaped shed that reduces the number of moving parts and enhances operational efficiency, allowing for increased production speed and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional circular looms use numerous control levers arranged around the cam carrier, then the shed can be formed, but the machine requires frequent maintenance, has high energy consumption, and produces excessive noise
Solution Approach 1:
The patent combines multiple control levers into a single control lever that actuates multiple shed-forming devices simultaneously. This merging reduces the total number of control levers from many individual levers to just one or a few levers that control groups of shed-forming devices, thereby reducing maintenance requirements and improving reliability while maintaining the necessary shed formation functionality
Solution Approach 2:
The control lever is designed with multi-functionality to actuate multiple shed-forming devices at different positions around the circular reed. A single control lever performs the function of multiple separate control levers by controlling groups of shed-forming devices simultaneously, reducing the overall complexity of the control system
2Device complexity
If several shed forming devices are linked simultaneously by one or two control levers to reduce the number of control levers, then the number of control levers decreases, but a stepped shed is formed that shortens the shed in end areas and increases dead space between sheds
Solution Approach 1:
The patent introduces dynamic control of the control lever position to vary the effective control curve during operation. By dynamically adjusting the control lever's position or the cam profile it engages with, the system can form smooth wave-shaped sheds rather than static stepped sheds, maintaining optimal shed geometry while using fewer control levers
Solution Approach 2:
The patent changes the parameters of the control mechanism by using an offset control lever position or a specially designed cam profile that compensates for the simultaneous linkage of multiple shed-forming devices. This parameter adjustment transforms the control curve to produce smooth wave-shaped sheds instead of stepped sheds, eliminating the geometric deficiencies
3Device complexity
If a stepped shed is formed with smaller usable space, then fewer shuttles can circulate simultaneously, but the number of control levers is reduced
Solution Approach 1:
The dynamic control lever mechanism creates smooth wave-shaped sheds that maximize the usable space within the circular reed. This dynamic adjustment ensures that shuttles have adequate clearance throughout their entire circulation path, allowing the maximum number of shuttles to operate simultaneously and maintain high production speed while using fewer control levers
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
The design minimizes maintenance needs, reduces noise, and allows for more shuttles to operate simultaneously, enhancing production speed and protecting moving parts by reducing the risk of collisions and tears, while maintaining efficient operation.
Implementation Method 1
Upon rotation of the control cam carrier, the control cam, either directly or indirectly, imparts a pivoting movement to each pivoting element about a pivoting axis arranged essentially radially to the main axis and a lifting movement
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Circular loom (1; 19; 41) with warp guide elements arranged around a circular reed (2; 20; 42) of the circular loom (1; 19; 41) for feeding warp (4a, 4b), with a control cam carrier (3; 21; 43) in which a control cam (6, 7; 22; 44) is formed, with shed forming devices (5; 23; 45) which divide the warp (4a, 4b) into two warp sets (10a, 10b) and impart opposite alternating movements to the two warp sets (10a, 10b), whereby a shed (11) is opened and closed between the two warp sets (10a, 10b).The weaving training devices (5; 23; 45) have pivoting elements (12, 13; 30; 54; 55) and warp thread lifting means, wherein the at least one control cam (6, 7; 22; 44) imparts a pivoting movement and a lifting movement to each pivoting element (12, 13; 30; 54, 55) when the control cam carrier (3; 21; 43) is rotated, and wherein the pivoting elements (12, 13; 30; 54, 55) impart alternating movements to the warp thread lifting means by means of the pivoting movement and the lifting movement.