Rotary Preform Heater with Lane Compensation
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Solution Overview
Problem
Conventional temperature adjustment devices for thermoplastic preforms transported in two adjacent lanes often result in uneven thermal treatment due to disturbances or deviations in component alignment, requiring significant effort to ensure uniform conditioning.
Innovation Solution
A temperature adjustment device with a rotary transport system and compensation devices that adjust the heating or cooling of preforms in one lane differently than the other, ensuring uniform thermal conditioning by using radiant heaters that act on both lanes and adjustable compensation mechanisms for temperature differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If preforms are transported in two adjacent transport lanes, then transport capacity is improved, but thermal uniformity deteriorates due to disturbances or misalignment causing uneven heating
Solution Approach 1:
The heating system provides different heating intensities to different localities (transport lanes) through individually controllable heating zones. Each heating zone can be independently adjusted to compensate for local thermal variations, ensuring uniform heating across all lanes despite their different positions and potential misalignments.
Solution Approach 2:
The system changes heating parameters (temperature, heating duration, heating intensity) dynamically for different transport lanes based on real-time temperature measurements. By adjusting these parameters individually for each lane, the system compensates for thermal inequalities and maintains uniform heating across all lanes.
2Device complexity
If heating elements are arranged to act on both transport lanes, then device complexity is reduced, but temperature control precision deteriorates due to inability to compensate for lane-specific variations
Solution Approach 1:
The heating system is segmented into multiple independently controllable heating zones along the transport path. Each zone can be individually controlled to provide precise temperature management for different sections of the transport lanes, enabling compensation for lane-specific thermal variations while maintaining a relatively simple overall structure.
Solution Approach 2:
The system incorporates temperature sensors that continuously monitor the thermal state of preforms in different transport lanes and provide feedback to the control system. Based on this feedback, the heating parameters are automatically adjusted to maintain precise temperature control and compensate for any thermal deviations in specific lanes.
3Manufacturing precision
If strict equal treatment of preforms in both lanes is enforced, then thermal uniformity is improved, but ease of operation deteriorates due to significant effort required for monitoring and adjustment
Solution Approach 1:
The heating system is designed to automatically self-adjust and self-regulate temperature distribution across transport lanes through integrated sensors and control algorithms. The system monitors its own thermal state and makes necessary adjustments without requiring external intervention, thereby maintaining thermal uniformity while minimizing operational effort.
Solution Approach 2:
Automatic feedback control systems continuously monitor temperature variations in different transport lanes and adjust heating parameters in real-time to maintain thermal uniformity. This automated feedback mechanism eliminates the need for manual monitoring and adjustment, significantly reducing operational effort while ensuring consistent thermal treatment.
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 allows for uniform thermal conditioning of preforms across both lanes, reducing the need for strict equal treatment and enabling economical, energy-efficient heating while compensating for temperature differences, ensuring consistent preform quality for molding.
Implementation Method 1
the radiant heaters radiate into both transport lanes so that the corresponding sections of the two transport lanes form a uniform radiation space in which the preforms are heated by the action of radiation
Data Source
AI summary
A temperature adjustment device (2) for thermally conditioning preforms (10) made of a thermoplastic material for subsequent molding including a transport device based on the rotary principle for transporting the preforms along a transport path that has at least one section with two adjacent transport lanes (32, 34) for transporting the preforms in two adjacent rows. Heating elements (36) are arranged between the transport lanes for heating the preforms. Each heating element acts on preforms in both transport lanes. At least one compensation device (22, 22′, 23, 24) for compensating for temperature differences between the preforms is assigned to the two transport lanes, which exclusively or more strongly acts on preforms in one of the two transport lanes for adjusting their temperature. Also, a container manufacturing machine (1) for manufacturing containers (12) from preforms that includes a temperature adjustment device.