Packaging Machine Conveyor Speed Control
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Solution Overview
Problem
Existing flow-pack packaging machines require a long conveying path to ensure articles are evenly spaced, making them cumbersome and unsuitable for compact applications, and they struggle to handle articles fed at arbitrary spacings.
Innovation Solution
A packaging machine with independent conveyor units and a control unit that adjusts the speed of each conveyor to maintain a predetermined spacing between articles, using abutment members on chains or belts to push and transfer articles along a shorter path, allowing for efficient packaging regardless of initial article spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple conveyor belts are used to accelerate and decelerate articles to achieve uniform spacing, then article spacing precision is improved, but the conveying path length increases significantly
Solution Approach 1:
The patent applies dynamics by making the conveyor belt speed variable rather than constant. The control unit dynamically adjusts the speed of each conveyor belt based on real-time article position feedback from sensors. This allows articles to be accelerated and decelerated along a shorter path while achieving the required uniform spacing, resolving the contradiction between spacing precision and path length.
Solution Approach 2:
The patent implements a feedback control system where sensors detect article positions and feed this information to a control unit. The control unit uses this feedback to continuously adjust conveyor belt speeds, ensuring precise article spacing is achieved despite variations in initial article positions. This feedback mechanism enables accurate spacing control on a compact machine with shorter conveying paths.
2Reliability
If conveyor belts are positioned to release articles onto downstream conveyors with limited acceleration capability, then article handling reliability is improved, but the required conveying path length increases
Solution Approach 1:
The patent uses dynamic speed control of conveyor belts to compensate for limited acceleration capabilities. By adjusting belt speeds according to real-time article positions and required spacing, the system achieves reliable article handling on a shorter path. The control unit calculates optimal speeds that prevent slipping while maintaining reliability, eliminating the need for long conveying paths.
Solution Approach 2:
The patent changes the operating parameters (speeds) of the conveyor belts dynamically based on article positions and spacing requirements. This parameter adjustment allows the system to achieve the same reliable article handling effect as a long conveyor path would provide, but in a more compact configuration with shorter conveying paths.
3Adaptability or versatility
If the machine is designed to handle articles fed at arbitrary spacings, then adaptability is improved, but the complexity of the feed system increases
Solution Approach 1:
The patent uses feedback from sensors that detect article positions to enable the control unit to adapt to arbitrary initial spacings. The control unit processes this feedback information and dynamically adjusts conveyor speeds to achieve uniform output spacing regardless of input variations. This feedback-based adaptation achieves high versatility without requiring complex mechanical feed systems.
Solution Approach 2:
The patent replaces complex mechanical spacing mechanisms with a control-based system. Instead of using intricate mechanical devices to physically space articles, the system uses sensors and control algorithms to detect and adjust article positions through variable conveyor speeds. This substitution of mechanical complexity with electronic control achieves adaptability to arbitrary spacings more simply.
Data Source
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AI summary
A machine (1) for packaging articles (A) comprises: feed means (4) for feeding a film (N) to a packaging station (5), where the film (N) is used to wrap the articles (A), a conveying line (2) for conveying the articles (A) to the packaging station (5) along a conveying path (P) extending from a pickup zone (R1), where the articles (A) are picked up, to a release zone (R2), where the articles (A) are released, the conveying line (2) comprising a plurality of pushing and transfer means (6) consisting at least of first means (6a) for pushing and transferring the articles (A) and second means for pushing and transferring the articles (A), the first and second pushing and transfer means (6a) and (6b) being configured to pick up the articles (A) in turn at the pickup zone (R1) and being able to be driven independently, the machine further comprising a control and drive unit (8) programmed to drive each of the pushing and transfer means (6a, 6b) in at least one portion (7) of the conveying path (P) according to a law of motion which is variable as a function of signals (s1, s2, s4), for releasing the articles (A) at the release zone in coordination with the packaging station (5), at a distance (D*) from each other and at a controlled speed.