Fabric Spreading Carriage With Switchable Chute and Vertical Drop
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Solution Overview
Problem
Existing fabric spreading machines are inefficient for both lightweight and substantial fabrics, as they either cause creases in lightweight fabrics due to chute sliding or result in lower spreading speeds for heavier fabrics due to vertical drops, limiting the versatility and speed of fabric deposition.
Innovation Solution
A machine with a movable unwinding system that can switch between vertical and chute drop configurations, allowing for optimal spreading speeds and ease of technique change, featuring a carriage with a conveyor belt system, inclined chute, and a cutting system, along with a movement system that adjusts the unwinding system's position to avoid creases and ensure efficient fabric laying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fabric is conveyed over a substantial portion of the conveyor belt and slides on the chute, then the fabric can be spread effectively, but creases are formed in lightweight fabrics requiring manual intervention
Solution Approach 1:
The invention makes the conveyor belt system dynamic by enabling it to assume different positions (first position for chute drop, second position for vertical drop) through the movement system. This allows the fabric handling method to be dynamically adjusted based on fabric type, resolving the contradiction between effective spreading and crease formation by selecting the appropriate configuration for each fabric weight category.
Solution Approach 2:
The invention changes the geometric parameter of the fabric path by altering the position of the conveyor belt and fabric drop point. For lightweight fabrics, the parameter is changed to enable vertical drop avoiding chute contact; for substantial fabrics, the parameter returns to chute-based spreading. This parameter change resolves the contradiction by adapting the physical path to fabric properties.
2Speed
If the fabric drops vertically from the unwinding system without a chute, then spreading speed increases for substantial fabrics, but the fabric belly forms due to carriage motion limiting the speed
Solution Approach 1:
The invention introduces dynamics to the fabric drop system by enabling switching between vertical drop (for speed) and chute drop (for stability). The movement system allows the conveyor belt to dynamically adjust its position, enabling the system to achieve high speeds for substantial fabrics when using vertical drop, while maintaining fabric flatness through chute guidance when needed.
3Productivity
If a fixed chute-based spreading system is used, then substantial fabrics can be spread effectively, but lightweight fabrics develop creases and the system lacks versatility
Solution Approach 1:
The invention applies universality by designing a single fabric spreading machine that can handle both lightweight and substantial fabrics effectively. The movement system enables the conveyor belt to assume different positions, allowing the machine to perform chute-based spreading for substantial fabrics and vertical drop for lightweight fabrics, thus achieving multi-functionality and resolving the contradiction between spreading effectiveness and adaptability.
4Device complexity
If the unwinding system position is fixed, then the machine structure is simpler, but switching between spreading techniques for different fabrics is time-consuming
Solution Approach 1:
The invention introduces a movement system that enables dynamic repositioning of the conveyor belt between different configurations. This dynamic capability allows rapid switching between chute-based and vertical drop techniques without manual reconfiguration, resolving the contradiction by accepting moderate increased complexity in exchange for significantly reduced technique change time.
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 machine achieves versatile and rapid fabric spreading for both lightweight and substantial fabrics, optimizing deposition speeds and minimizing creases, while allowing easy switching between techniques, thus enhancing operational efficiency.
Implementation Method 1
the simultaneous rotation of the conveyor belts transmits rotational motion to the roll of fabric about its own axis, which results in the unwinding of the fabric from the roll
Implementation Method 2
the fabric, continuing to move, drops downwards until it rests on the inclined chute that guides the strip of fabric towards the cutting system
Data Source
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AI summary
A machine (1) for spreading fabric on a spreading plane (2) comprising a carriage (3) that is movable on the spreading plane, the carriage comprising an unwinding system (6) for unwinding the fabric; an inclined chute arranged below; a cutting system (11) for cutting the fabric, arranged at a lower end (12) of the chute; and a movement system (35) for moving the unwinding system between a first and a second unwinding operating configuration, wherein in the first configuration, a first end (14) of the unwinding system is vertical to the chute (10) and in the second configuration, the first end (14) is in an advanced position towards the cutting head (13).