Hot Melt Adhesive Powder Application System for Non-Metallic Surfaces
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Solution Overview
Problem
Conventional methods for bonding non-metallic objects using liquid adhesives are labor-intensive, energy-consuming, and pose health risks due to toxic solvents, especially in applications like shoe part assembly where manual application and solvent evaporation are required.
Innovation Solution
A system comprising a convey belt, radiation, spraying, and heating chambers that automates the application and melting of hot melt adhesive powder using ultraviolet rays, electrostatic charging, and powder recycling, reducing manual labor and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual application of liquid adhesive is used, then bonding of non-metallic objects can be achieved, but labor intensity increases and working environment deteriorates due to toxic solvents
Solution Approach 1:
The invention changes the physical state of adhesive from liquid to powder form, eliminating the need for solvent evaporation and associated toxic emissions. This parameter change (liquid→powder) directly resolves the harmful factors while maintaining bonding functionality
Solution Approach 2:
The invention replaces manual mechanical application with automated electrostatic spraying system. The electrostatic charging mechanism automatically directs adhesive powder to the bonding surface, reducing labor intensity and improving ease of operation
2Ease of manufacture
If solvent based liquid adhesive is used, then bonding can be achieved, but energy consumption increases due to evaporation requirements
Solution Approach 1:
The invention utilizes phase transition of hot melt adhesive powder from solid to liquid state through controlled heating at the bonding zone, eliminating the need for energy-intensive solvent evaporation. The adhesive applies in powder form and melts only where needed
Solution Approach 2:
The invention changes the adhesive application method from solvent-based liquid (requiring evaporation) to hot melt powder (melting only at application point). This parameter change dramatically reduces energy consumption by eliminating bulk evaporation
3Ease of operation
If automated spraying system is used, then labor intensity is reduced, but device complexity increases
Solution Approach 1:
The invention divides the bonding system into separate functional modules: powder storage, electrostatic charging section, spraying section, and heating section. This segmentation allows each component to be relatively simple while achieving overall automation
Solution Approach 2:
The electrostatic spray head performs multiple functions: charging the adhesive powder, directing the spray pattern, and controlling deposition. This multi-functionality reduces the number of separate components needed, managing 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 system enhances automation, reduces energy consumption, minimizes labor intensity, and improves working conditions by enabling automatic spraying and melting of hot melt adhesive powder, while recycling the powder to prevent environmental pollution and protect worker health.
Implementation Method 1
the radiation chamber irradiates the to-be-bonded object by ultraviolet rays and ozone
Implementation Method 2
the spray head sprays charged hot melt adhesive powder onto a surface of the to-be-bonded object
Implementation Method 3
the heating chamber is provided with a heating device to generate heat to melt the hot melt adhesive powder
Implementation Method 4
the radiation chamber is further provided with a ozone generator
Data Source
AI summary
A system for applying hot melt adhesive powder onto a non-metallic object surface comprises a convey belt, a radiation chamber, a spraying chamber and a heating chamber. The convey belt is used to deliver a non-metallic object treated by a cleaning agent and a conductive liquid through the radiation chamber where the surface of the non-metallic objected is irradiated by ultraviolet rays and ozone and then through the spraying chamber where the surface of the non-metallic object is sprayed with charged hot melt adhesive powder, and finally into the heating chamber where the hot melt adhesive powder attached onto the non-metallic object will be melted into a liquid adhesive film ready to be bonded.