Electromagnetic Plastometer for Rubber Hardness Testing
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Solution Overview
Problem
Current manual methods for measuring rubber compound hardness are prone to variability due to differences in force and contact speed, making it difficult to achieve objective and precise measurements.
Innovation Solution
A plastometer with a main frame, driving unit, electromagnet, loading dock, upper mold, and measuring unit, which includes a lifting platform driven by screws and a transmission belt, an electromagnet, and a magnetic member to stabilize and accurately measure the hardness of rubber materials by controlling the pressure applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual measurement method is used, then operation simplicity is improved, but measurement precision deteriorates due to force and contact speed variability
Solution Approach 1:
The patent replaces the manual mechanical measurement system with an automated electromechanical system. The electromagnet controls the loading dock to apply standardized force, and the driving motor with transmission belt controls the lifting platform for standardized contact speed, eliminating human variability in force application and contact speed while maintaining ease of operation through automated control.
Solution Approach 2:
The patent changes the measurement parameters from manual variable force and contact speed to controlled electromagnetic force and motor-driven contact speed. The electromagnet's magnetic field strength and the motor's rotation speed are standardized parameters that ensure consistent measurement conditions, resolving the precision issue while keeping the device easy to operate through standardized automation.
2Measurement precision
If automated electromechanical system is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the measurement system into distinct functional modules: the electromagnet module for force control, the driving motor module for motion control, the lifting platform module for positioning, and the measurement module for data collection. Each module performs a specific function, making the complex system manageable and maintainable while achieving high measurement precision through coordinated operation of these segmented components.
Solution Approach 2:
The patent designs components with multiple functions to reduce overall complexity. For example, the lifting platform serves both as a positioning mechanism and as a support for the electromagnet; the transmission belt provides both motion transmission and synchronization of multiple screws. This multi-functionality reduces the number of separate components needed, managing device complexity while maintaining measurement precision.
3Reliability
If synchronized motion control is implemented, then measurement consistency is improved, but control system complexity increases
Solution Approach 1:
The patent merges the control functions for the lifting platform and loading dock into a coordinated electromechanical system. The driving motor controls both the transmission belt (which moves the lifting platform) and the screws (which control the loading dock position) through the transmission belt connection. This merged control approach ensures synchronized motion for measurement consistency while avoiding the need for separate complex control systems for each component.
Solution Approach 2:
The patent implements feedback through the measurement unit that detects the position and force parameters during measurement. This feedback information is used to verify that the lifting platform and loading dock are moving synchronously as intended, and to adjust control parameters if deviations occur, ensuring measurement consistency while managing control system complexity through automated feedback control.
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 plastometer ensures stable and precise hardness measurements by synchronously moving the lifting platform and loading dock, allowing for consistent pressure application and accurate data collection, thereby improving measurement efficiency and objectivity.
Implementation Method 1
The electromagnet is secured to a bottom of the lifting platform and moves with the lifting platform. The lifting platform further comprises two L-shaped positioning frames at two sides of the electromagnet. The loading dock is disposed between the top plate and the positioning plate and connected to a connecting column passing through the lifting platform and the electromagnet and mounted with a magnetic member.
Implementation Method 2
The driving unit further comprises two screws, a driving motor, and a transmission belt. The two screws are symmetrically installed through the top plate and the bottom plate of the main frame and connected to the lifting platform. The driving motor is configured to drive the two screws, and the two screws are coupled by the transmission belt for synchronized rotation to lift the lifting platform along the two supporting columns.
Data Source
AI summary
A plastometer has: a main frame, a driving unit, an electromagnet, a loading dock, a lower mold, an upper mold and a measuring unit the driving unit drives the lifting platform, so the lifting platform makes a stable elevating displacement along the two supporting columns. Then, the electromagnet attracts and controls the loading dock, so the pressure amount to be provided by the loading dock for each test object 80 can be simply obtained, and the measurement operation is actually performed by the measuring unit which can get accurate test results to improve the measurement efficiency of the relevant industry.