Modular Foam Dispensing Gun with Interchangeable Cartridges
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Solution Overview
Problem
Current two-component polyurethane foam dispensing guns face challenges such as clogging, uneven dispensing, and high manufacturing costs due to complex metering rod designs and limited interchangeability, and lack effective cleaning mechanisms and temperature indication for optimal foam application.
Innovation Solution
A modular foam spray gun design with a pivotable trigger, safety lock, and a third input hose for dispensing a liquid or gas, featuring a removable nozzle that changes color with temperature and a high/low flow control mechanism, enhancing dispensing precision and ease of use while allowing for interchangeable modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex metering rod design is used to improve dispensing precision, then the manufacturing cost increases
Solution Approach 1:
The dispensing system is divided into separate modular components: a reusable gun body and interchangeable cartridges containing the metering rod and nozzle assembly. This segmentation allows the complex metering rod to be pre-manufactured with high precision in a controlled environment, then assembled into the gun body, reducing overall manufacturing complexity and cost while maintaining dispensing precision.
Solution Approach 2:
The cartridge containing the metering rod and nozzle is designed as a disposable or replaceable component. Instead of manufacturing the entire gun with high-precision metering rods, the complex precision components are confined to inexpensive, replaceable cartridges. When worn or clogged, the entire cartridge is replaced rather than repaired, reducing manufacturing costs while maintaining dispensing precision during its service life.
2Ease of manufacture
If a fixed non-modular design is used to simplify manufacturing, then the interchangeability and adaptability of the dispensing gun is limited
Solution Approach 1:
The gun body is designed with a universal interface that can accommodate multiple types of cartridges with different nozzle configurations, metering rod designs, and chemical compatibility features. This universal mounting mechanism allows a single gun body to perform multiple functions by simply changing cartridges, providing adaptability and interchangeability while keeping the base gun design simple and easy to manufacture.
Solution Approach 2:
The system transitions from a static fixed design to a dynamic modular design where cartridges can be quickly exchanged based on application requirements. The mounting mechanism incorporates quick-release features that allow operators to change cartridges without complex tools or procedures, enabling the system to adapt dynamically to different dispensing needs while maintaining manufacturing simplicity through standardized interfaces.
3Device complexity
If traditional cleaning mechanisms are not included to simplify the gun design, then clogging occurs due to reaction with moisture in the air
Solution Approach 1:
The cleaning function is extracted from the main gun body and integrated into the replaceable cartridge design. Each cartridge contains its own sealed cleaning mechanism or is designed to be easily disassembled for cleaning, isolating the cleaning complexity from the permanent gun structure. This allows the gun body to remain simple while ensuring each cartridge has adequate clogging prevention capabilities.
Solution Approach 2:
The cartridge design incorporates self-cleaning features such as built-in purging channels, self-actuating cleaning mechanisms, or designs that facilitate easy user cleaning without requiring disassembly of the gun body. The cartridge serves its own cleaning needs through its modular design, preventing clogging while keeping the main gun structure simple and minimizing overall device complexity.
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 modular design improves dispensing precision, reduces clogging and manufacturing costs, and provides effective cleaning and temperature indication, enabling broader application of polyurethane foam with improved consistency and cost-effectiveness.
Implementation Method 1
the removable nozzle that changes color with temperature
Implementation Method 2
This fluorocarbon component is a compressed gas which exits in its liquid state under pressure and changes to it gaseous state when the aerosol liquid is dispensed into a lower pressure ambient environment
Data Source
AI summary
A modular foam spray gun is illustrated in which a third hose is attached to the gun for the application of either a liquid or a gas, the spray gun having a transverse channel positioned at a rear of the housing of the gun for securedly affixing the separable module to the housing of the spray gun.