Removable Movement Device for Plastic Preform Transfer Accuracy
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Solution Overview
Problem
Existing systems for heating plastic preforms face inaccuracies in transfer point adjustments, leading to placement errors and increased wear and tear, particularly during format changes, due to mechanical adjustments and coupled drive systems that fail to detect distortions or jams promptly.
Innovation Solution
The apparatus features separate drive devices for each transport device, allowing independent control and adjustment of transfer points, with sensor systems to detect potential errors and prevent damage by stopping the transfer process, and a decoupling mechanism to fine-tune the transfer point without mechanical changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a toothed belt couples the sawtooth star wheel with the transport chain drive, then the transfer point is established once at the factory and mechanical adjustments are avoided, but the transfer accuracy suffers and placement errors occur during format changes
Solution Approach 1:
The patent introduces a movable adjustment element that allows the transfer point to be dynamically repositioned along the transport path. This enables the system to adapt to different format requirements while maintaining high transfer accuracy, resolving the contradiction between ease of operation and manufacturing precision by making the previously fixed transfer point adjustable without complex mechanical post-adjustment procedures
Solution Approach 2:
The patent changes the positional parameter of the transfer point by introducing an adjustable mechanism that can shift the transfer location along the transport path. This allows the system to optimize transfer accuracy for different preform formats while maintaining operational simplicity, effectively resolving the contradiction between fixed setup and adaptive precision
2Adaptability or versatility
If the sawtooth star wheel is used to separate plastic preforms with different neck diameters, then part costs are saved and format changeovers are simplified, but the transfer point may be displaced by up to 0.5 mm leading to deterioration of transfer quality
Solution Approach 1:
The patent implements a dynamically adjustable transfer point mechanism that can be repositioned to compensate for variations in preform neck diameters. This allows the system to handle different formats with a single sawtooth star wheel while maintaining transfer accuracy within 0.5 mm, resolving the contradiction between versatility and precision by adding adaptability to the transfer mechanism
Solution Approach 2:
The patent incorporates a feedback mechanism that detects the actual position of the transfer point and adjusts it accordingly to maintain accuracy. This feedback system ensures that even when handling preforms with varying neck diameters, the transfer point remains accurately positioned, resolving the contradiction between format adaptability and transfer precision
3Stability of the object's composition
If the drive train components are coupled together, then the system operates as an integrated unit, but distortion or jamming is detected late or not at all, increasing wear and tear
Solution Approach 1:
The patent introduces sensor-based feedback mechanisms that continuously monitor the drive train components for distortion, jamming, or abnormal conditions. This feedback system enables early detection of problems while maintaining integrated operation, resolving the contradiction between system integration and reliability by adding monitoring capabilities that detect issues before they cause damage
Solution Approach 2:
The patent implements protective measures through sensor monitoring that detect potential failures before they occur. By detecting drive train distortions and jamming conditions in advance, the system can take preventive action to avoid damage, resolving the contradiction between integrated operation and reliability by cushioning against potential failures
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
This solution ensures precise and accurate transfer points, reduces machine damage, and automates format changes, preventing unnoticed wear and tear and improving overall transfer quality.
Implementation Method 1
at least one heating device (6) is provided that heats the plastic preforms transported by the second transport device
Data Source
AI summary
An apparatus for heating plastic preforms includes a first transport device that transports the plastic preforms in a separated manner, wherein said first transport device has a plurality of recesses for receiving the plastic preforms, and a second transport device that takes over the plastic preforms transported by the first transport device and transports the plastic preforms along a predetermined transport path. The apparatus has at least one sensor device that detects at least one measured value that is characteristic of at least one of the two drive devices, and a control device that is designed to control the drive device for moving the holding elements as a function of this characteristic measured value.