Motor-Driven Discharge Control for Form-Fill-Seal Machines
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Solution Overview
Problem
Current product discharge devices in form-fill-seal machines, controlled by pneumatic drives, face limitations in achieving high opening/closing speeds and optimal discharge cycle adjustments, leading to reduced working speeds and reliability, especially at high production rates.
Innovation Solution
A motor-driven product discharge control device with synchronized levers and a connecting rod-crank mechanism allows for precise control of discharge element speed and position, enabling faster discharge times and adjustable settings for different products without mechanical adjustments, using a servomotor for controlled parameterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pneumatic drives are used to control discharge elements, then the device structure is simple, but the opening and closing speed is limited and vibrations occur at high speeds
Solution Approach 1:
The patent replaces the pneumatic drive system with an electric motor-driven mechanical transmission system. The motor coupled with gears, cranks, and connecting rods provides precise control over the discharge elements' motion, eliminating the speed limitations and vibrations inherent in pneumatic systems while maintaining operational reliability at high speeds.
Solution Approach 2:
The patent implements a dynamic control mechanism where the electric motor can adjust the opening and closing speeds of the discharge elements in real-time. The synchronized levers and connecting rods ensure that both discharge elements move dynamically in coordination, optimizing the discharge cycle and preventing collisions during high-speed operation.
2Adaptability or versatility
If fixed pneumatic control positions are used, then the device structure is simple, but the adaptability to different products is limited
Solution Approach 1:
The patent employs a dynamic control system where the electric motor can be programmed to adjust the opening positions and speeds of the discharge elements according to different product requirements. This dynamic adjustability allows the same device to handle various products efficiently without requiring complex mechanical reconfiguration mechanisms.
Solution Approach 2:
The patent changes the control parameters (opening position, opening speed, closing speed) of the discharge elements through electronic control of the electric motor. This allows flexible adaptation to different products by simply modifying control parameters rather than changing physical components, balancing adaptability with system simplicity.
3Productivity
If faster discharge speeds are achieved, then the work cycle is reduced and production capacity increases, but the risk of collisions and vibrations increases
Solution Approach 1:
The patent implements a feedback control mechanism where the electric motor's control system monitors the position and motion state of the discharge elements in real-time. This feedback allows the system to adjust speeds and positions dynamically, enabling fast discharge operations while preventing collisions by detecting and correcting potential conflict conditions before they occur.
Solution Approach 2:
The patent uses preliminary action by pre-positioning the discharge elements and pre-adjusting their motion parameters before the discharge cycle begins. The electric motor control system prepares the synchronized levers and connecting rods in optimal positions, ensuring that high-speed operation can proceed without collisions while maximizing productivity.
Data Source
AI summary
The invention relates to a discharge control device, comprising a hopper (1) receiving a metered product amount where it is deposited, discharge control elements (3) movable between a closed position and an open position by a driving mechanism, and a fill tube (2) connecting the discharge control device with a fill nozzle of the form-fill-seal machine whereby a bag is filled with product, wherein the driving mechanism of the discharge control elements (3) comprise a motor (7) driving the movement of one of the discharge control elements (3), and a synchronizing connecting rod (9) synchronizing the movement of the discharge control element (3) driven by the motor (7) with the other discharge control element (3). The invention allows filling bags reliably and more quickly.