Zone-Based Heating Element for Uniform Plastic Pipe Welding
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Solution Overview
Problem
Existing heating elements for contactlessly heating plastic profile ends, such as pipe ends, suffer from non-uniform temperature distribution and heat accumulation, leading to inconsistent weld seams, and are not adaptable to different pipe diameters, requiring separate heating plates for varying sizes.
Innovation Solution
A heating element with a conductive heating plate featuring multiple radially spaced heating zones, each independently controllable, and insulated from others to prevent heat conduction, allowing for uniform heating and energy efficiency across various pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating cartridges are arranged in bores projecting into the centre of the heating plate, then the heating plate can be heated, but the temperature distribution becomes non-uniform with higher temperatures near the heating cartridges and lower temperatures in distant regions
Solution Approach 1:
The heating plate is divided into multiple independently controllable heating zones (first heating zone, second heating zone, third heating zone) arranged radially. Each zone can be heated selectively based on the pipe diameter being processed, allowing uniform temperature distribution across the heating surface and eliminating the temperature gradients caused by central heating cartridge arrangements.
2Temperature
If heating cartridges are used to heat the entire heating plate, then heating can be achieved, but heat accumulation occurs in the upper inner region of the pipe leading to non-uniform heating
Solution Approach 1:
Different heating zones are activated selectively based on the specific pipe diameter being processed. For example, only the innermost heating zone is activated for small pipe diameters, while outer zones remain inactive. This localized heating approach prevents energy waste and eliminates heat accumulation in regions that do not require heating, achieving uniform temperature distribution throughout the pipe wall.
3Adaptability or versatility
If a single heating plate design is used for all pipe diameters, then device simplicity is maintained, but adaptability to different pipe sizes is lost requiring separate heating plates
Solution Approach 1:
The heating plate incorporates dynamically controllable heating zones that can be selectively activated based on the pipe diameter. The system includes control mechanisms (such as control units with sensors) that automatically adjust which heating zones are active, allowing a single heating plate design to adapt to various pipe sizes without requiring physical reconfiguration or multiple dedicated plates.
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 uniform and energy-efficient contactless heating of plastic profile ends, ensuring consistent weld seams and accommodating different pipe diameters without the need for multiple heating plates, by using a modular design with concentric heating rings and insulation gaps to minimize heat transfer.
Implementation Method 1
a heating wire (3) for generating the IR heat beams
Implementation Method 2
heating element for generating IR heat beams for contactlessly heating
Implementation Method 3
heating plate made at least partially of a conductive material
Implementation Method 4
insulation gaps to minimize heat transfer
Data Source
AI summary
Heating element for generating IR heat beams for contactlessly heating plastic profile ends, preferably for end-face welding of pipes or fittings clamped in a device, comprising a heating plate made at least partially of a conductive material and having two heatable faces, a heating wire for generating the heat beams, wherein the heating wire is arranged on the faces of the heating plate, wherein the heating plate has a plurality of heating zones spaced apart radially from one another.