Continuous Microwave Curing System for Laminated Structures
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Solution Overview
Problem
Traditional adhesive bonding processes in industries like shoemaking are labor-intensive, time-consuming, and prone to errors, with manual application of adhesive requiring significant manpower and leading to issues like residual glue and poor bonding.
Innovation Solution
A continuous microwave curing system and process that uses a conveyor belt to feed laminated structures with environmentally friendly adhesives into a microwave heating cavity, allowing for rapid and uniform heating and solidification of materials of different sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual adhesive application is used, then bonding can be achieved, but the process is labor-intensive and time-consuming
Solution Approach 1:
The patent replaces manual mechanical adhesive application with an automated adhesive application device that uses controlled dispensing mechanisms. This substitution eliminates manual labor while maintaining precise adhesive placement, directly resolving the contradiction between productivity improvement and automation extent.
Solution Approach 2:
The system incorporates automatic adhesive application and microwave curing that operate without continuous manual intervention. The adhesive is automatically dispensed and the curing process is automatically initiated, allowing the system to serve itself and eliminating the need for ongoing manual operations.
2Loss of time
If traditional heating methods are used, then heating can be achieved, but it takes a long time for the center to reach desired temperature
Solution Approach 1:
The patent replaces traditional thermal conduction heating with microwave electromagnetic heating. This substitution enables volumetric heating where the center and surface are heated simultaneously through dielectric heating, eliminating the time delay associated with heat conduction from the surface to the center.
Solution Approach 2:
The microwave heating process induces rapid molecular rotation and friction in the adhesive, generating heat throughout the material volume simultaneously. This phase transition in the heating mechanism allows the center temperature to rise at the same rate as the surface temperature, dramatically reducing total heating time.
3Strength
If too much adhesive is applied, then bonding strength is sufficient, but residual glue affects appearance and causes operational issues
Solution Approach 1:
The automated adhesive application device applies adhesive with precise local control, dispensing the exact amount needed at each specific location. This local precision ensures sufficient bonding strength at the interface while preventing excess adhesive from accumulating and causing appearance defects or operational problems.
Solution Approach 2:
The system incorporates control mechanisms that monitor and regulate adhesive application in real-time, providing feedback to maintain optimal adhesive quantity. This feedback control ensures consistent bonding strength while preventing the operational issues caused by excessive adhesive.
4Strength
If too little adhesive is applied, then equipment operation is easier, but bonding properties are poor and service life is reduced
Solution Approach 1:
The automated application system ensures adequate adhesive is applied at each local bonding interface with precise control. This local quality control guarantees sufficient bonding strength and reliable service life while maintaining ease of operation through consistent, error-free application.
Solution Approach 2:
The feedback control mechanism monitors adhesive application quantity and adjusts in real-time to ensure the minimum required amount is applied for reliable bonding. This prevents under-application that would compromise service life while avoiding over-application that would create operational difficulties.
5Manufacturing precision
If adhesive is applied manually, then flexibility is maintained, but consistency and precision are poor
Solution Approach 1:
The patent replaces manual adhesive application with an automated dispensing system that uses programmed motion control and precise metering mechanisms. This substitution dramatically improves application precision and consistency while the modular design of the automated system keeps complexity manageable through standardization.
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 enables efficient, safe, and automated curing of laminated structures, reducing manpower requirements, improving production efficiency, and ensuring uniform heating and solidification of adhesives, thus enhancing the quality and service life of products.
Implementation Method 1
Microwave is an electromagnetic wave with a frequency of 300 MHz to 300 GHz. In recent years, it has also been used in various industries and agriculture for heating, drying, cracking or solidifying substances. Commonly used frequencies of microwave power are 915 MHz and 2450 MHZ, which can cause the molecules of polar substances to rub against each other to generate heat.
Implementation Method 2
a microwave absorbing structure, disposed above inside the interior of the first microwave suppression cavity or the second microwave suppression cavity, and containing at least one microwave absorbing material
Data Source
AI summary
A continuous microwave curing system, includes a heating cavity with a microwave power source and an inlet opening and an outlet opening on opposite sides; a first microwave suppression cavity, connected to the inlet opening of the heating cavity; a second microwave suppression cavity, connected to the outlet opening of the heating cavity; a conveyor belt, used to transport a laminated structure that needs to be heated by microwave power; wherein the laminated structure includes at least one adhesive and two layers of objects, the adhesive is placed between the two layers of objects. A continuous microwave curing process includes placing an adhesive between two layers of objects to form a laminated structure and using a conveyor belt to send the laminated structure into a heating cavity for heating with microwave power for a period of time, so that the temperature of the adhesive reaches above 60 degrees.