Hot Press Surface Temperature Control via Infrared Feedback
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Solution Overview
Problem
Wood material panel hot presses face inefficiencies in producing high-quality panels due to temperature inhomogeneities and defects caused by suboptimal heat transfer, leading to material ruptures and increased waste, as existing temperature sensors measure internal temperatures rather than surface temperatures.
Innovation Solution
Implementing a contactless temperature measurement system using an infrared camera to monitor surface temperatures on the outlet side of the panel, allowing for real-time adjustments of process parameters such as pressing force and heat output to maintain uniform temperature distribution and prevent defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the feed speed is increased to improve productivity, then production speed increases, but defects occur due to insufficient heat transfer and material ruptures
Solution Approach 1:
The patent implements a feedback control system using infrared sensors to continuously monitor the surface temperature of the wood material panel during pressing. The measured temperature is fed back to the control unit, which automatically adjusts process parameters (pressing force, heat output) to maintain optimal temperature ranges, enabling high feed speeds without quality defects
Solution Approach 2:
The system dynamically changes process parameters based on real-time temperature measurements. When the surface temperature deviates from the target range, the control unit adjusts the pressing force and/or heat output to compensate, allowing the feed speed to be increased while maintaining product quality through automatic parameter optimization
2Loss of information
If temperature sensors are used to monitor internal temperatures, then temperature data is obtained, but the measurement precision is insufficient for controlling surface temperature and heat transfer
Solution Approach 1:
The patent replaces mechanical contact temperature sensors with contactless infrared sensors that measure surface temperature through thermal radiation. This substitution provides precise surface temperature measurements without physical contact, enabling accurate monitoring of heat transfer from the press to the panel surface
Solution Approach 2:
The infrared sensors act as an intermediary between the pressing process and the control system. They indirectly measure surface temperature through thermal radiation without interfering with the pressing process, providing accurate real-time data for feedback control of heat transfer and pressing parameters
3Loss of substance
If waste reduction is achieved by adjusting heat output, then material waste decreases, but further waste reduction is still desired
Solution Approach 1:
The feedback control system monitors surface temperature in real-time and automatically adjusts process parameters to maintain optimal pressing conditions. This prevents defects and material waste by ensuring consistent temperature control, enabling both waste reduction and maintained productivity
Solution Approach 2:
The system performs preliminary temperature monitoring and adjustment during the pressing process to prevent defects before they occur. By proactively controlling surface temperature and heat transfer, the system prevents material waste and reduces the need for rework or scrap
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 approach enables the production of high-quality wood material panels with reduced waste by ensuring precise temperature control and homogeneity, allowing for increased feed speed without defects and optimizing the production process.
Implementation Method 1
a temperature measurement device (36) arranged on the outlet side (34) in order to detect a surface temperature on a surface of the wood material panel (32)
Data Source
AI summary
The disclosure relates to a wood material panel hot press for producing a wood material panel, wherein the wood material panel hot press has an inlet side and an outlet side, and is designed to press a blank supplied on the inlet side in order to form a wood material panel. According to the invention, a temperature measurement device is provided which is designed to automatically measure the temperature (T) of the wood material panel on the outlet side in a spatially resolved manner.