Conveyor Belt Stabilization via Spring-Loaded Lateral Guide
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Solution Overview
Problem
Existing transport devices for flat parts, such as plastic cards, face challenges in achieving high throughput while maintaining high print quality, as prior solutions often result in a trade-off between increased throughput and deteriorated print quality due to lateral movements and vibrations of the conveyor belt.
Innovation Solution
A transport device with a conveyor belt guided by a carrier structure featuring lateral guide elements with spring elements that apply a pretensioning force to stabilize the belt, reducing sideways movement and vibrations, and a magazine device with an endless loop configuration to ensure continuous operation without interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conveyor belt moves at high speed to achieve high throughput, then productivity increases, but lateral movements and vibrations increase causing deterioration in print quality
Solution Approach 1:
The guide element is made movable rather than fixed, allowing it to dynamically adapt to the conveyor belt's lateral movements and vibrations. The spring element provides a flexible pressing force that maintains contact while accommodating the belt's dynamic behavior at high speeds, thereby stabilizing the belt without causing damage.
Solution Approach 2:
The pressing force of the guide element is made variable through the spring element, which can adjust the force parameter based on the belt's movement. This variable pressing force allows effective lateral guidance at different speeds while preventing excessive friction and wear that would occur with a fixed pressing force.
2Manufacturing precision
If fixed guide elements are used to prevent lateral movement of the conveyor belt, then manufacturing precision improves, but friction and wear increase due to pinching the belt
Solution Approach 1:
The guide element incorporates a spring element that makes the pressing force dynamic rather than fixed. This allows the guide element to maintain contact with the conveyor belt for alignment while automatically adjusting the pressing force to minimize friction and prevent belt damage during operation.
Solution Approach 2:
The spring element acts as a cushioning element that anticipates and absorbs the impacts and friction between the guide element and conveyor belt. By providing this beforehand cushioning, the system reduces wear and tear on the belt while maintaining effective lateral guidance.
3Manufacturing precision
If the conveyor belt is constrained rigidly to prevent lateral movement, then manufacturing precision improves, but the belt cannot compensate for irregularities in the transport route
Solution Approach 1:
The guide element is designed to be movable with respect to the carrier structure, allowing it to dynamically respond to irregularities in the transport route. The spring element enables the guide element to adapt its position and pressing force, providing both stability for precision and adaptability for compensating route irregularities.
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 solution enables precise printing at high throughput by stabilizing the conveyor belt and optimizing the movement of flat parts, reducing wear and maintaining belt alignment, while the magazine device ensures continuous operation without the need for reversing the transport direction, thus enhancing overall efficiency.
Implementation Method 1
the guide element also having a spring element which pretensions the guide element at the contact area in a pressing direction against the conveyor belt
Implementation Method 2
the carrier structure having a cavity in which a negative pressure can be generated, and the carrier structure being designed in such a way that the cavity is at least temporarily connected to at least one of the openings so that a negative pressure can be generated at the at least one opening to hold the parts
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present invention relates to a transport device (14) for conveying planar parts, preferably flat plastic parts, in particular plastic cards, the transport device (14) with a conveyor belt (20) which moves along a transport direction (22), and with a support structure (24) for the conveyor belt (20) which supports the conveyor belt (20) and guides it along the transport direction (22).The conveyor belt (20) has openings (26), the support structure (24) has a cavity (28) in which a vacuum can be generated, and the support structure (24) is designed such that the cavity (28) can be brought into contact with at least one of the openings (26) at least temporarily, so that a vacuum can be generated at the at least one opening (26) to hold the parts (12), wherein the support structure (24) further has at least one lateral guide element (30) which can come into contact with the conveyor belt (20) in a contact area (32) and which is designed to reduce movement of the conveyor belt (20) in a lateral direction (34) transverse to the transport direction (22), wherein furthermore the guide element (30) has a spring element (36) which pre-tensions the guide element (30) at the contact area (32) in a pressing direction (38) against the conveyor belt (20).Furthermore, a device (10) for printing on flat parts (12) is shown with a transport device (14) and/or with a magazine device (16).