Singling Apparatus Height Guidance for Preform Jamming
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Solution Overview
Problem
Existing singling devices for PET bottle preforms suffer from reliability issues due to positional errors that go undetected, leading to jamming and operational interruptions, which are not adequately addressed by current technologies.
Innovation Solution
A singling apparatus featuring a pair of parallel guidance elements with a liftable height guidance and a jamming detection system, utilizing sensors like light barriers and ultrasonic sensors to detect and correct positional errors, ensuring preforms are properly aligned and conveyed, and an ejection arrangement to remove malpositioned bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roller conveyor is used to convey preforms in a single row, then conveying capacity is increased, but reliability decreases due to undetected positional errors causing jamming
Solution Approach 1:
The height guidance element is positioned upstream in the conveyance path to correct positional errors of cylindrical bodies before they reach the run-off track. By performing the correction action in advance, the system prevents jamming from occurring, thereby maintaining both high conveying capacity and operational reliability without requiring complex detection and intervention systems downstream.
2Reliability
If the height guidance is made liftable to free jammed cylindrical bodies, then reliability is improved, but device complexity increases
Solution Approach 1:
The height guidance element is designed with liftable sections that can dynamically adjust their position vertically. This dynamic capability allows the guidance element to adapt to different situations: maintaining a fixed height to correct positional errors during normal operation, and lifting temporarily to release jammed cylindrical bodies. This dynamic design provides a simple yet effective solution that improves reliability without requiring complex control systems.
3Stability of the object's composition
If preforms are conveyed with collars contacting adjacent preforms, then conveying stability is improved, but positional detection accuracy worsens due to undetected errors
Solution Approach 1:
The height guidance element acts as an intermediary between the cylindrical bodies and the run-off track. It provides a reference surface that ensures proper alignment and spacing of the cylindrical bodies during conveyance. The guidance element mediates the interaction between adjacent preforms, maintaining stable conveying while preventing positional errors from developing into jamming conditions, thereby eliminating the need for complex detection systems.
Data Source
AI summary
An arrangement for separating cylindrical bodies, such as parisons for hollow bodies, which have at least one protuberance at a first end, has a pair of parallel guide elements between which the cylindrical bodies can be erected in that the cylindrical bodies hang on the guide elements in each case by way of the protuberance. The separation arrangement here has a height guide, wherein a spacing between the height guide and the cylindrical bodies, as seen in the conveying direction, decreases to a predetermined spacing in relation to the guide elements, as a result of which vertically projecting cylindrical bodies, as they are being conveyed in the conveying direction, are forced downwards by the height guide and wherein the height guide can be raised briefly by means of a lifting device in accordance with a triggering signal.