Microwave Heating Press for Solid Wood Forming
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Solution Overview
Problem
Existing pressing devices for solid wood components are inefficient in achieving rapid plastic deformation and consistent forming quality due to suboptimal heating and pressure distribution.
Innovation Solution
A pressing device utilizing microwave heating and adjustable pressure elements, with a modular design and directional microwave antennas for efficient energy use, allows for precise temperature control and high pressing forces, enabling rapid forming of solid wood components with consistent quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional heating methods are used in pressing devices, then the structure is simple, but the energy efficiency is low and heat distribution is uneven
Solution Approach 1:
The patent replaces conventional thermal conduction heating with microwave radiation heating. The microwave heating device generates electromagnetic waves that directly heat the wood material through dielectric heating, eliminating the need for complex thermal conduction paths and achieving superior energy efficiency and uniform heat distribution.
Solution Approach 2:
The microwave heating process induces rapid phase transitions in the water molecules within the wood material, converting electromagnetic energy directly into thermal energy throughout the material volume simultaneously, achieving rapid and uniform heating that conventional methods cannot achieve.
2Productivity
If conventional heating and pressing methods are used, then the process is simple, but the forming time is long and plastic deformation is insufficient
Solution Approach 1:
The microwave heating device pre-heats the wood material rapidly before the pressing operation begins, increasing the material's plasticity and deformation capability in advance. This preliminary thermal treatment enables faster subsequent forming operations and reduces overall cycle time.
Solution Approach 2:
The pressing process employs periodic cycles of microwave heating followed by pressing operations. This alternating sequence allows the material to be repeatedly heated to enhance plasticity and then pressed to achieve the desired shape, accelerating the overall forming process.
3Use of energy by moving object
If microwave heating is applied directly to the press plate, then heating efficiency is high, but microwave radiation is blocked and energy is wasted
Solution Approach 1:
The press plate is constructed from microwave-transparent or microwave-permeable materials that allow electromagnetic waves to pass through. This flexible design enables microwave radiation to penetrate the press plate and directly heat the wood material underneath, maximizing energy utilization and eliminating radiation loss.
4Manufacturing precision
If high pressing forces are applied to achieve profile deformation, then forming quality improves, but the material becomes too rigid and cannot be deformed
Solution Approach 1:
The microwave heating process fundamentally changes the thermal and mechanical parameters of the wood material, raising its temperature to a range where plasticity is enhanced and rigidity is reduced. This parameter change enables the material to deform under pressing forces that would be insufficient at lower temperatures.
Solution Approach 2:
Microwave heating induces thermal expansion and softening of the wood material's cellular structure, reducing its rigidity and increasing its capacity for plastic deformation. This thermal state allows high pressing forces to effectively reshape the material without causing fracture or excessive resistance.
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 achieves economical and efficient energy use, ensuring high forming quality with reduced manufacturing tolerances and shorter cycle times, while allowing for the production of various wood profiles with precise control over moisture content.
Implementation Method 1
a microwave heating device (6) for heating a raw part (7), preferably made of solid wood, to be formed into the wooden element (2) by a pressing process
Implementation Method 2
heating device (6) with a wave guide device (10) for microwaves
Implementation Method 3
by pressurizing an expansion element (29) arranged as a drive device (30) for the press die (9)
Implementation Method 4
elastically deformable pipes or hoses to be pressurized with a pressure medium
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A press device (1) has a sub-framework (2) with a press-plate (8) with a mounting surface for single- or multi-layer blanks to be pressed from solid wood, via a drive device (30). A micro-wave control device (10) is formed through a plastics hollow molding (11) between the press plate (8) and a parallel extending support plate (17) provided with a microwave generator (19), and which are oriented in a vertical direction to one bottom face (27) of the press plate (8).