Ceramic Liquefier for Adhesive Glue Gun
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Solution Overview
Problem
Existing hot glue guns require significant heating times and energy consumption due to the mass of metal elements, making them unsuitable for portable and energy-efficient applications, and previous solutions are either complex or prone to mechanical issues.
Innovation Solution
A liquefaction body made of electrical resistance material, such as barium oxide ceramic, is integrated into the melting chamber, allowing direct heat input without additional heat transfer components, with a tapered design and electrodes for efficient heating and energy use, suitable for battery operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a metal element is used as the melting chamber with heating resistors, then high heating power can be applied, but the heating time becomes very long (up to 300 seconds or more) and energy consumption increases
Solution Approach 1:
The patent extracts the melting chamber function from the heavy metal body and implements it as a separate ceramic heating element. The ceramic element with heating resistors integrated into its lateral surfaces directly contacts the adhesive rod, eliminating the need to heat the entire metal melting chamber. This extraction reduces the thermal mass that must be heated while maintaining the ability to apply high heating power locally at the adhesive contact point.
Solution Approach 2:
The ceramic heating element acts as an intermediary between the heating resistors and the adhesive rod. Instead of heating the metal chamber and relying on thermal conduction to melt the adhesive, the ceramic element directly contacts and heats the adhesive through its lateral surfaces. This intermediary approach enables more efficient and faster heat transfer to the adhesive material.
2Loss of time
If the melting chamber is replaced by an electrically heated grid, then heating energy and heating time are reduced, but the device becomes mechanically complex and prone to problems under excessive pressure
Solution Approach 1:
The heating function is segmented into multiple independent heating zones along the lateral surfaces of the ceramic element. Heating resistors are distributed along the sides of the ceramic heating element, creating multiple heat sources that contact the adhesive rod at different positions. This segmentation allows for more uniform and efficient heating while maintaining structural simplicity and robustness under pressure.
Solution Approach 2:
The patent uses a composite structure combining ceramic material with integrated heating resistors. The ceramic body provides mechanical strength and thermal properties, while the embedded heating resistors provide the heating function. This composite approach eliminates the need for separate grid structures, reducing mechanical complexity while maintaining efficient heating performance and robustness under operational pressure.
3Reliability
If continuous heating is applied to prevent adhesive cooling, then the adhesive remains liquid in the melting chamber, but electrical energy consumption increases significantly
Solution Approach 1:
The ceramic heating element with lateral heating resistors enables continuous and efficient heat transfer to the adhesive rod as it is fed into the melting chamber. The multiple heating zones along the lateral surfaces ensure that the adhesive is continuously heated and melted as it moves through the chamber, maintaining reliable adhesive flow without requiring excessive energy input compared to heating a large metal mass.
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 design significantly reduces heating times and energy consumption, enabling a portable and user-friendly adhesive application device that can achieve operational readiness in approximately 10-15 seconds, suitable for battery operation and large-scale production.
Implementation Method 1
A liquefaction body made of electrical resistance material, such as barium oxide ceramic, is integrated into the melting chamber, allowing direct heat input without additional heat transfer components
Data Source
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Figure 9~10
AI summary
The invention relates to a device for applying adhesives, comprising a housing designed to receive a solid, preferably pin- or rod-shaped, plastic element (22) that interacts with electrically heat-generating liquefiers (10) and provides an outlet at one end for dispensing the adhesive liquefied by the liquefiers. According to the invention, the liquefiers are implemented as a liquefier (10) made of a heat-generating electrical resistance material, which provides a molten contact surface (18) for interaction with a preferably end-face section of the adhesive element. This molten contact surface is inclined relative to an axis (21) extending along a feed axis of the adhesive element, preferably at an angle (19) of > 0° and < 90°, more preferably > 5° and < 40°, and even more preferably > 10° and < 30°.