Jet Adapter for Plastering Machines Using Gas Injection
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Solution Overview
Problem
Current plastering methods, including manual and mechanical techniques, face limitations such as reliance on human experience, inefficient application speed, poor adhesion due to pressure-based application, and inability to effectively cover tall walls without scaffolding, with existing machines struggling to apply plaster uniformly and efficiently.
Innovation Solution
A unique jet adapter for plastering machines that utilizes non-pressure jets with precisely defined cross-sections and gas injection to provide kinetic energy for plaster application, allowing for faster and more uniform coverage with improved adhesion, compatible with smart machines for semi-automatic operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual plastering methods are used, then flexibility and adaptability to wall surfaces are maintained, but productivity is low (25 minutes per 1 m2) and quality depends on human experience
Solution Approach 1:
The patent replaces manual mechanical plastering operations with an automated jet adapter system that uses controlled gas flow and jet mechanisms to apply plaster. The system substitutes human skill-based control with automated control mechanisms, enabling consistent quality and higher productivity without depending on operator experience.
Solution Approach 2:
The patent changes the fundamental parameters of plaster application by transitioning from manual throwing/coating to pressurized jet application. By controlling parameters such as gas pressure, jet angle, and material flow rate, the system achieves consistent plaster application quality and speed independent of operator skill level.
2Productivity
If pressure-based plaster application is used, then application speed is improved, but adhesion quality deteriorates due to air entrapment
Solution Approach 1:
The patent applies different qualities of pressure control to different aspects of plaster application. Localized pressure is applied through jet openings to propel plaster material, while simultaneous local vacuum or controlled atmosphere is maintained to prevent air entrapment. This localized quality control enables both speed and adhesion quality.
Solution Approach 2:
The patent uses pneumatic principles by introducing gas flow through the jet adapter to control plaster application. The gas flow creates a controlled atmosphere that prevents air entrapment while maintaining high application speed. The pneumatic system allows precise control over material delivery without the harmful effects of uncontrolled pressure.
3Extent of automation
If existing plastering machines are used, then automated operation is achieved, but device complexity increases and adaptability to different wall configurations is reduced
Solution Approach 1:
The patent segments the plastering system into a separate jet adapter module that can be attached to existing machines. This segmentation allows automation functionality to be added without redesigning the entire machine, reducing overall device complexity while maintaining adaptability to different wall configurations.
Solution Approach 2:
The jet adapter is designed as a universal component that can be attached to various existing plastering machines and adapted to different wall types and configurations. This multi-functionality reduces device complexity by using a single adaptable component rather than requiring machine-specific specialized equipment.
4Adaptability or versatility
If scaffolding is erected for tall walls, then access to upper wall areas is achieved, but loss of time and device complexity increase
Solution Approach 1:
The jet adapter system is designed to be self-positioning and self-adjusting, allowing the operator to access different wall heights without external scaffolding support. The system's mobility and adjustability enable it to serve itself in positioning, eliminating the need for separate scaffolding setup and dismantling time.
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
Enables the application of 1 m2 of standard plaster with a thickness of 5 to 15 mm in approximately 3 minutes, improving plaster quality and efficiency while allowing for independent, nearly automatic operation on walls of varying heights and shapes without the need for scaffolding.
Implementation Method 1
The gas feeds open into the jet channel at the maximum distance corresponding to four times the diameter of the jet channel and at the minimum distance corresponding to 1.5 times the diameter of the jet channel in the place of the gas feed entry from the jet channel inlet opening. The gas feeds are connected to air tubing supplying pressurized gas to the gas feeds at the pressure of at least 0.3 MPa, preferably 0.8 MPa at the maximum.
Data Source
AI summary
A jet adapter (1) for plastering machines is designed for (semi)automatic application of materials, such as plaster, heat insulation foam, penetrating agent, etc. onto walls Thanks to its design, this unique jet adapter (1) in combination with a smart plastering machine is capable of plastering 1 m of a standard wall in 3 minutes, including plaster trowelling. The application of material onto the wall is performed by especially designed material jets (2) comprising a jet channel (22) and at least two gas feeds (24) entering the jet channel (22) at the slope ranging from 20° to 60° with reference to the axis of the jet (2), which feed the jet (2) with pressurized gas, that in the jet (2) accelerates the supplied material and provides it with energy sufficient for leaving the jet (2).