Vehicle Door Trim Bonding Device Radiant Heating

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Solution Overview

Problem

Existing methods for coupling vehicle door trims require complex assembly processes and energy wastage due to prolonged heating times and environmental pollution from heat convection methods, with conduction methods facing challenges in molding without additional support.

Innovation Solution

A vehicle door trim coupling device using a heat supplier with a continuously curved flat plate heater emitting radiant heat between 200°C to 800°C for rapid melting, combined with a molding part that press-molds the protrusion without additional supporting force, allowing for instantaneous energy use and reduced cooling times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conduction heating method is used to melt the protrusion, then heating can be achieved through direct contact, but heating time becomes excessively long

Engineering Contradiction:
Improveheating efficiencyVSAvoidheating time
Core Design Contradiction:
TemperatureVSLoss of time

Solution Approach 1:

The patent replaces the mechanical contact-based conduction heating system with a radiant heating system that uses electromagnetic radiation (infrared or other radiant energy) to heat the protrusion without physical contact. This substitution eliminates the need for thermal conduction through contact surfaces and enables rapid heating by directly energizing the material molecules, thereby resolving the contradiction between achieving sufficient heating and minimizing heating time.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs periodic or pulsed radiant heating rather than continuous heating, allowing the heating element to deliver intense thermal energy in short bursts. This periodic action enables the protrusion to reach melting temperature quickly while minimizing total heating time and energy consumption, effectively resolving the time efficiency contradiction.

Inventive Principle:
Principle #19Periodic action

2Temperature

If convection heating method is used to melt the protrusion, then heating can be achieved through heat transfer, but heat waste causes environmental pollution and thermal losses

Engineering Contradiction:
Improveheating capabilityVSAvoidthermal loss
Core Design Contradiction:
TemperatureVSLoss of energy

Solution Approach 1:

The patent replaces the convection-based heating system (which relies on fluid circulation and contact) with a radiant heating system that transfers thermal energy through electromagnetic waves. This eliminates the need for convective heat transfer media and reduces thermal losses to the surrounding environment, as radiant energy can be directed precisely at the protrusion without requiring extensive heat distribution systems that waste energy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The radiant heating system applies heat locally and directly to the protrusion surface that requires melting, rather than heating a large volume of material or environment through convection. This localized heating approach concentrates thermal energy where needed, minimizing wasted heat and reducing environmental pollution from excess thermal emissions.

Inventive Principle:
Principle #3Local quality

3Device complexity

If conduction heating method is used without additional supporting parts, then assembly can be simplified, but molding of the protrusion becomes difficult

Engineering Contradiction:
Improveassembly complexityVSAvoidmolding precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The patent replaces contact-dependent conduction heating with radiant heating that does not require physical contact or additional supporting fixtures. The radiant energy can penetrate and heat the protrusion from a distance, allowing the molding process to proceed without complex support structures, thereby maintaining both simplicity and precision.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent transitions from a contact-based heating approach (requiring supporting parts in the same spatial dimension) to a radiant heating approach that operates from a different dimension (through electromagnetic field interaction). This allows heating and molding to occur without additional supporting fixtures, simplifying the overall device while maintaining molding precision through controlled radiant energy application.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 solution enables quick coupling of sub trims with reduced energy wastage and assembly time, enhancing productivity by minimizing the need for additional supporting forces and reducing environmental impact.

Implementation Method 1

a heater formed spaced apart from a circumferential surface of the protrusion at a predetermined distance by being disposed inside of the heating hole, and configured to emit radiant heat

Methodology Applied
Scientific EffectRadiant heat: Thermal Radiation

Implementation Method 2

a heat supplier configured to melt a part of the protrusion by radiant heat; and a molding part configured to press-mold the melted protrusion

Methodology Applied
Scientific EffectMelting: Melting

Data Source

PatentEP3103620B1Vehicle door trim bonding device
Publication Date: 2020.03.18 GUNYANG ITT
  • EP3103620B1 patent drawingFigure 1~2
  • EP3103620B1 patent drawingFigure 3
  • EP3103620B1 patent drawingFigure 4

AI summary

The objective of the present invention is to provide a vehicle door trim bonding device capable of quickly bonding sub-trims. In order to achieve the objective, the present invention provides a vehicle door trim bonding device for coupling a first sub-trim in which a projection is formed and which is made of a thermoplastic resin material, and a second sub-trim in which a receiving hole for receiving the projection of the first sub-trim is formed and which is made of a thermoplastic resin material, the device comprising: a heat supply unit for melting a part of the protrusion with radiation heat; and a molding part for compression-molding the molten protrusion.