Blow Molding Machine Liquid Temperature Control System
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Solution Overview
Problem
Blow molding machines face challenges in maintaining optimal operating temperatures for functional equipment components like electric servomotors and electronic control devices, which are prone to overheating due to high temperature loads during production, affecting process and operational reliability.
Innovation Solution
A liquid temperature control system is integrated to set and maintain optimal operating temperatures for functional equipment components, using combined temperature circuits and a centralized control unit, which can operate independently or in conjunction with the primary function temperature control system, and includes features like rotary feedthroughs for heat transfer and air conditioning units to manage heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric servomotors and electronic control devices are used for secondary functions in blow molding stations, then movement control sensitivity and individual control processes are improved, but heat generation and temperature load on functional equipment components increase
Solution Approach 1:
The patent divides the temperature control into separate circuits: a first temperature control circuit for blow molds and a second temperature control circuit for functional equipment components. This segmentation allows independent temperature management for each component type, preventing the heat generated by electric servomotors and electronic devices from affecting the blow molds, while also preventing ambient heat from overheating the functional equipment.
Solution Approach 2:
The patent applies different temperature levels to different locations/components based on their specific requirements. The second temperature control circuit provides localized temperature control for functional equipment components (servomotors, frequency converters, control units) that generate or are sensitive to heat, while the first circuit maintains optimal temperatures for blow molds. This local quality approach ensures each component operates at its optimal temperature without being affected by thermal conditions of other components.
2Temperature
If multiple separate feeds and returns for mold shells and bottom molds extend from the rotary union, then temperature control for blow molds is achieved, but device complexity increases
Solution Approach 1:
The patent merges the temperature control for blow molds and functional equipment components into a unified liquid temperature control system. The first and second temperature control circuits share common infrastructure including the liquid supply, rotary feedthrough, and temperature control device, while maintaining separate control paths. This combining approach reduces overall system complexity compared to having completely separate systems, while still enabling independent temperature management for different components.
Solution Approach 2:
The liquid temperature control system is designed with multi-functionality to serve both blow molds and functional equipment components through a single integrated system. The temperature control device can selectively direct temperature-controlled liquid to different circuits based on operational requirements, making the system universal rather than requiring separate dedicated systems for each function.
3Productivity
If functional equipment components are exposed to high ambient temperatures, then production continuity is maintained, but operational reliability and service life of functional equipment components decrease
Solution Approach 1:
The patent converts the harmful effect of ambient heat into a beneficial controlled thermal environment. Instead of allowing functional equipment components to be passively exposed to high ambient temperatures that reduce reliability, the second temperature control circuit actively manages thermal conditions. The system can provide cooling when ambient temperatures are high or heating when temperatures are low, transforming the unpredictable harmful thermal environment into a controlled beneficial condition that extends component service life while maintaining production continuity.
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 reliable operation and extended service life of blow molding machines by maintaining functional equipment components at optimal temperatures, enhancing process and operational reliability while simplifying the machine's structure and reducing external liquid supply needs.
Implementation Method 1
a liquid temperature control system T for the functional equipment components (4) of secondary functions... which rotates with it and is connected, for example, via a flow and a return (26, 27) to a central supply arranged in the stationary part (2) or outside of the blow molding machine B... used to set and maintain optimal operating temperatures for functional equipment components
Implementation Method 2
a primary function liquid temperature-control system (6) for the blow molds (3)... which is connected via a rotary feedthrough (5) to a central supply arranged in the stationary part (2) or outside of the blow molding machine B
Data Source
Figure 1
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AI summary
In a blow molding machine (B) for producing containers (F) from tempered preforms (P) into tempered blow molds (3) having blowing stations (S), wherein at least the blowing stations (S) are assigned functional equipment components (4), such as at least electric servomotors (18, 19) for controlling and/or monitoring secondary functions in the production operation, a controllable and electrically operated liquid temperature control system (T) supplied by at least one temperature control unit (24) is integrated into the blow molding machine (B) and guided via the functional equipment components (4) for tempering at least some functional equipment components (4) for secondary functions.