Measuring Apparatus Uniform Temperature Control
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Solution Overview
Problem
Conventional measuring apparatuses for injection molding face issues with non-uniform temperature distribution leading to measurement errors, piston jamming, and sample leakage due to gaps between the piston and testing cylinder.
Innovation Solution
A measuring apparatus with a temperature-controlling bucket and testing cylinder, featuring a spirally extended heating wire and cooling pipe for uniform temperature distribution, and upper and lower pistons with temperature sensors and heating wires to maintain temperature balance, preventing leakage and jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional measuring apparatus uses a simple heating structure, then the device complexity is low, but the temperature distribution becomes non-uniform leading to measurement errors
Solution Approach 1:
The heating system is segmented into multiple heating wires positioned at different locations (bucket wall, cylinder wall, piston) rather than a single heating source. This segmentation allows independent temperature control at different zones to achieve uniform temperature distribution throughout the testing sample, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
Different heating and cooling elements are applied to different locations: heating wires on the bucket wall and cylinder wall, cooling pipes in the bucket wall, and temperature sensors at multiple positions. This local quality approach ensures each region receives appropriate thermal treatment to maintain uniform temperature distribution, improving measurement accuracy while justifying the increased structural complexity.
2Reliability
If the piston fits tightly in the testing cylinder to prevent leakage, then sealing performance improves, but the piston may become jammed due to thermal expansion differences
Solution Approach 1:
The temperature of the piston is actively controlled to match the temperature of the testing cylinder through heating wires and temperature sensors. By changing and maintaining the temperature parameter, the thermal expansion of both components is synchronized, preventing jamming while maintaining tight sealing performance.
Solution Approach 2:
The piston and testing cylinder are maintained at the same temperature potential through coordinated heating and temperature control. This equipotential state eliminates thermal expansion differences that would cause relative movement or jamming, allowing the piston to move freely while maintaining sealing contact.
3Stability of the object's composition
If the measuring apparatus uses advanced temperature control systems, then temperature uniformity improves, but the energy consumption increases
Solution Approach 1:
The temperature control system operates continuously with heating wires and cooling pipes working in coordination to maintain uniform temperature. This continuous action prevents temperature fluctuations and gradients, ensuring stable temperature uniformity throughout the testing process while managing energy consumption through efficient heat transfer pathways.
Solution Approach 2:
Temperature sensors positioned at multiple locations provide feedback on the actual temperature distribution. This feedback information is used to adjust the heating and cooling systems dynamically, maintaining optimal temperature uniformity while minimizing energy consumption by activating heating or cooling only when and where needed.
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
The apparatus ensures accurate volumetric variation measurement under different temperatures and pressures by eliminating measurement errors and preventing sample leakage, while maintaining uniform temperature distribution and preventing piston jamming.
Implementation Method 1
a piston heating wire received in the receiving room
Implementation Method 2
a cooling pipe disposed in the bucket wall and surrounding the bucket heating wire
Implementation Method 3
a piston temperature sensor and a piston heating wire are received in the receiving room
Data Source
AI summary
A measuring apparatus includes a base and a testing module. The testing module is received in the base and includes a temperature-controlling bucket, a testing cylinder, and upper and lower pistons. The temperature-controlling bucket extends in a vertical direction and has a bucket wall having a bucket inner surface and a bucket outer surface opposite to the bucket inner surface. The testing cylinder extends in the vertical direction, is received in the temperature-controlling bucket, and has a cylinder wall having a cylinder inner surface and a cylinder outer surface opposite to the cylinder inner surface. The upper and lower pistons plug top and bottom ends of the testing cylinder, respectively. The upper piston has a receiving room located inside the upper piston, and has a piston temperature sensor and a piston heating wire received in the receiving room.