Plastic Particle Feeding Weight Control With Dynamic Motor Feedback
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Solution Overview
Problem
Existing methods for controlling the feeding weight of plastic particles in plastic product production face challenges such as low precision, inertia effects leading to weight deviations, and inefficient feeding due to fixed motor shutdown times, which are not adaptable to varying material characteristics.
Innovation Solution
A control method utilizing a speed regulating motor with weight feedback, where a central processor and motor controller work together to adjust dosing speed in multiple stages, incorporating real-time weight feedback and automatic correction of advance quantities to improve precision and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If weighing type feeding control is used to improve weight control accuracy, then manufacturing precision is improved, but the motor speed cannot be adjusted and inertia effects cause weight deviations
Solution Approach 1:
The patent applies dynamics by transitioning from fixed motor speed to dynamic speed regulation. The motor controller adjusts motor speed in real-time based on feedback from the weighing module, enabling the system to adapt to different material characteristics and control requirements while maintaining accurate weight control throughout the feeding process.
Solution Approach 2:
The patent changes the parameter of motor speed from a fixed value to a dynamically adjustable parameter. By modifying the motor speed parameter during operation based on weight feedback and material characteristics, the system achieves both accurate weight control and adaptability to different feeding conditions.
2Productivity
If motor speed is increased to reduce feeding time, then productivity is improved, but inertia effects cause actual weight to exceed set weight
Solution Approach 1:
The patent implements feedback control where the weighing module continuously monitors the weight of plastic particles and feeds this information back to the motor controller. The controller uses this feedback to dynamically adjust motor speed, reducing speed when approaching the target weight to minimize inertia effects and ensure accurate weight control while maintaining high productivity.
Solution Approach 2:
The system performs preliminary action by predicting the remaining weight needed and pre-adjusting motor speed before the motor stops. This allows the system to account for inertia effects in advance by reducing speed appropriately before the feeding cycle ends, ensuring accurate weight control.
3Manufacturing precision
If motor shutdown time is extended to account for material travel distance, then manufacturing precision is improved, but output is reduced due to longer cycle time
Solution Approach 1:
The patent applies dynamics by replacing fixed shutdown timing with dynamic speed adjustment. Instead of extending the shutdown period, the system dynamically reduces motor speed as the target weight approaches, allowing material to continue feeding at reduced rate while maintaining precision and avoiding extended cycle times that would reduce productivity.
4Ease of operation
If fixed advance shutdown time is used to control motor stopping, then ease of operation is improved, but manufacturing precision deteriorates due to variable material weight
Solution Approach 1:
The patent implements feedback control where the weighing module provides real-time weight information to the motor controller. This automatic feedback mechanism replaces manual fixed timing with intelligent dynamic control, maintaining ease of operation through automated control while achieving high manufacturing precision by continuously adjusting motor speed based on actual weight measurements.
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 method achieves high precision in batch weight control, reduces inertia-related weight deviations, and ensures efficient feeding by dynamically adjusting motor speed and correcting advance quantities in real-time, thus improving overall control accuracy and output stability.
Implementation Method 1
When the motor is shut down, due to the effect of inertia, if the speed is too high, the actual weight will easily exceed the set weight
Implementation Method 2
The weighing module collects the weight of the plastic particles in the container and feeds it back to the control controller
Data Source
AI summary
A control method of feeding weight of plastic particles based on speed regulating motor and weight feedback is characterized in that it includes a central processor (71), which is electrically connected to a motor controller (72), and the motor controller (72) drives a actuator (73) to drive a controlled object (74) to complete an operation, so that a mixing bin (4) outputs the corresponding amount of materials, and characterized in that a detection device (75) is set on the controlled object (74), and the detection device (75) is communicated with the central processor (71).