Sewing Machine Conveyor Belt Pressure Control
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Solution Overview
Problem
Conventional sewing machine conveying devices lack adjustable pressure control, leading to inconsistent cloth feeding and potential damage due to variable spring compression, and are not adaptable to cloth thickness and conformation, resulting in inefficiencies and safety issues.
Innovation Solution
A conveying device with a motorized conveyor belt and a pressing element actuated by a piston with elastic means, connected to a pressure control system, allowing for adjustable and constant pressure on the cloth through pneumatic or hydraulic regulation, and position limiting mechanisms to prevent cloth misalignment with rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a spring system is used to press the conveyor belt against the base, then the belt can be pressed against the cloth, but the pressure cannot be adjusted and varies with spring compression, causing cloth damage
Solution Approach 1:
The patent replaces the mechanical spring system with a pneumatic or hydraulic pressing element. This substitution allows for adjustable and controllable pressure through gas or liquid pressure regulation, eliminating the inability to adjust pressure and the harmful variable compression forces caused by springs.
Solution Approach 2:
The patent introduces a pneumatic or hydraulic pressing element that uses compressed gas or liquid to apply pressure to the conveyor belt. This enables precise pressure control and adjustability, resolving the contradiction between maintaining pressure and enabling pressure adjustment while preventing cloth damage from uncontrolled spring compression.
2Force
If a spring system is used to press the conveyor belt, then the belt presses the cloth against the base, but the pressure varies according to spring compression which may provoke damage of the cloth
Solution Approach 1:
The patent replaces the mechanical spring system with a pneumatic or hydraulic pressing element. This substitution allows for adjustable and controllable pressure through gas or liquid pressure regulation, eliminating the inability to adjust pressure and the harmful variable compression forces caused by springs.
Solution Approach 2:
The patent introduces a pneumatic or hydraulic pressing element that uses compressed gas or liquid to apply pressure to the conveyor belt. This enables precise pressure control and adjustability, resolving the contradiction between maintaining pressure and enabling pressure adjustment while preventing cloth damage from uncontrolled spring compression.
3Adaptability or versatility
If the conveyor belt position is fixed vertically, then the structure is simple, but the belt cannot adapt to the conformation and movement of the cloth
Solution Approach 1:
The patent makes the pressing element dynamic by allowing it to move vertically in response to cloth conformation and thickness variations. The pneumatic or hydraulic system enables the pressing element to automatically adjust its position, providing adaptability to different cloth forms while maintaining a relatively simple overall structure.
4Productivity
If two conveyor belts are used to translate cloth without rotation, then the cloth feeds properly, but the system lacks pressure control and adaptability
Solution Approach 1:
The patent introduces a pneumatic or hydraulic pressing element that can be integrated with the existing two-conveyor-belt system. This addition provides adjustable pressure control to improve cloth feeding efficiency for different fabric types and thicknesses, while maintaining the dual-belt configuration that prevents unwanted rotation.
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
Ensures optimal and consistent pressure control, adaptable to varying cloth thickness and conformation, reducing the risk of damage and improving the safety and practicality of the sewing process.
Implementation Method 1
a pressing element actuated by a piston which slides in the inside of a cylinder which comprises elastic means acting on the piston
Implementation Method 2
said cylinder is connected with a pressure control system and said pressing element is in touch with a sector of said plate and/or a sector of said belt so that the pressure control system regulates the pressure acting on the cloth to be conveyed
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Conveying device to be mounted on a sewing machine comprising a plate to be constrained to a base of the sewing machine, a conveyor belt mounted on two rollers constrained to a supporting structure so as to rotate, the supporting structure being coupled with the sewing machine, so that the conveyor belt is adjacent to the plate, and motor means connected with the conveyor belt and suited to put said belt in motion so that a cloth arranged between the plate and the conveyor belt translates when the conveyor belt is put in motion. The conveying device comprises at least a pressing element actuated by a piston of a cylinder which comprises elastic means and is constrained to the supporting structure of the conveyor belt, said cylinder being connected with a pressure control system. The pressure control system adjusts the pressure acting on the cloth to be conveyed since the elastic means are adjustable through the same system and the pressing element is in contact with the portion of the plate and/or belt.