Dual Rotary Gear Pump Metering for Hot Melt Adhesive Volume Control
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Solution Overview
Problem
Conventional hot melt adhesive or thermoplastic material dispensing systems struggle to rapidly change volumetric outputs to achieve desired deposition patterns and volumes on substrates, especially when processing different products at varying speeds, as altering the pump motor speed is insufficient to meet the required changes.
Innovation Solution
The system employs two separate and independent rotary gear-type metering pumps that can output precisely metered amounts of material, allowing for independent control and combination of volumes to achieve desired patterns and locations, with the ability to double the output from one pump by combining both.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the speed of the pump drive motor is altered to achieve desired output volumes, then the volumetric output can be adjusted, but the system cannot rapidly change output volumes to meet changing product processing speeds and requirements
Solution Approach 1:
The system divides the single pump into two separate and independent rotary gear-type metering pumps, each capable of independent operation. This segmentation allows each pump to be independently controlled and adjusted, enabling rapid volumetric output changes without altering a single motor's speed, thus resolving the contradiction between productivity adjustment speed and adaptability to different products
Solution Approach 2:
The system employs variable speed motors that can dynamically adjust the rotation speed of each pump independently. This dynamic control mechanism allows the volumetric output to be rapidly changed by adjusting motor speeds, providing both high productivity adjustment capability and adaptability to different product requirements
2Ease of operation
If a single pump system is used, then the system structure is simple, but the system cannot independently control different volumes of material for different patterns or locations on substrates
Solution Approach 1:
The system uses two separate and independent rotary gear-type metering pumps instead of a single pump. Each pump can be independently controlled to deliver different volumes of material, enabling complex deposition patterns and multi-location material application. This segmentation provides the operational flexibility needed for independent volume control while maintaining relatively simple individual pump designs
Solution Approach 2:
The system combines the outputs of two independent pumps through a common manifold and delivery system. This merging allows the volumes from both pumps to be combined or applied separately, providing versatile control over total material volume and deposition patterns while avoiding the need for two complete separate pump systems
3Productivity
If the pump motor speed is changed to match different substrate processing speeds, then the deposition rate can be adjusted, but the system cannot quickly change output volumes at predetermined times during the processing run
Solution Approach 1:
The system employs variable speed motors with independent control for each pump, allowing dynamic adjustment of rotation speeds during the processing run. This dynamic control enables rapid volumetric output changes at predetermined times without stopping the substrate processing, thus maintaining high productivity while minimizing time loss for volume adjustments
Solution Approach 2:
The system incorporates control mechanisms that monitor and adjust pump operation based on processing requirements. This feedback capability allows the system to automatically change output volumes at predetermined times during processing, maintaining optimal deposition rates while reducing the time needed for volume adjustments
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 enables rapid adjustment of volumetric outputs to match changing product processing needs, ensuring precise and flexible deposition of hot melt adhesive or thermoplastic materials onto substrates, enhancing the system's capability to handle diverse substrates and patterns.
Implementation Method 1
two separate and independent rotary, gear-type metering pumps, or two separate and independent sets of rotary, gear-type metering pumps, which are adapted to output or discharge precisely metered amounts of hot melt adhesive or other thermoplastic material
Data Source
AI summary
A hot melt adhesive material dispensing system comprises two separate and independent rotary, gear-type metering pumps, or two separate and independent sets of pumps, which are able to output precisely metered amounts of hot melt adhesive material. The hot melt adhesive materials discharged are able to be independently outputted through suitable output devices onto a substrate to result in different outputted volumes of the hot melt adhesive material in accordance with predeterminedly desired patterns, or at predeterminedly desired locations. The hot melt adhesive materials may also have their volumetric outputs combined such that the discharged or outputted volumes of the hot melt adhesive material onto the substrate may be, for example, twice the outputted volumes of the hot melt adhesive outputted onto the substrate from only one of the two pumps, or from only one of the two pumps.