MH-CHP
MINGHUNG
1. Heating Mechanism
Electromagnetic Field Action:
A high-frequency generator (typically operating at 13.56 MHz or 27.12 MHz) creates an alternating electromagnetic field that penetrates the OSB mat.
Molecular Friction Heating:
Polar molecules within the mat (primarily water and resin) rapidly oscillate under the electromagnetic field, converting electrical energy directly into heat through friction. This achieves volumetric internal heating, unlike conventional surface-to-core thermal conduction.
2. Frequency Selection Rationale
Penetration Depth:
Lower frequencies enable deeper electromagnetic wave penetration (e.g., 27.12 MHz penetrates mats beyond 30 cm), ensuring uniform heating for thick boards.
Thermal Efficiency Optimization:
The 13.56 MHz band maximizes thermal conversion efficiency for strands with 8-12% moisture content while complying with international industrial frequency standards (ISM band).
3. Advantages Over Conventional Heating
Energy Efficiency:
Conventional thermal oil heating: 40-50% efficiency; HF heating achieves 70-85% (reduced thermal loss).
Heating Speed:
Core temperature rise to 180°C takes 15-20 seconds (vs. 60+ seconds conventionally).
1. HF System Integration
Embedded Electrode Plates:
Copper-alloy electrode plates are embedded within upper/lower heated platens, connected to HF generators to form closed electric fields penetrating the mat.
Zoned Independent Control:
Multiple HF heating zones along press length (e.g., 6-8 zones), each independently adjustable for:
Power (0-100 kW)
Frequency fine-tuning (±1 MHz)
2. Synchronized Pressure-Temperature Control
Pressure Coordination:
Full HF power in high-pressure zones (infeed) rapidly activates resin; reduced frequency in low-pressure zones (outfeed) prevents over-curing.
Closed-Loop Temperature Feedback:
Infrared sensors monitor core temperature in real-time, dynamically adjusting HF power (±2°C precision).
1. Three-Stage Curing Breakthrough
（1） Rapid Heating (0-15 sec):
HF field elevates entire mat from 20°C to 160°C, initiating resin melting (conventional heating only reaches 120°C at surfaces).
（2） Isothermal Curing (15-70 sec):
Maintains 175-185°C core temperature for complete resin cross-linking (HF continuously compensates for endothermic reaction).
（3） Decompression Setting (70-90 sec):
HF power reduced to 10% with stepped pressure release, enabling elastic recovery.
2. Time-Reduction Key Technologies
Optimized Resin Reaction Kinetics:
HF heating improves temperature uniformity to 95% (vs. 75% conventionally), eliminating localized under-curing.
Directed Moisture Migration:
Electromagnetic fields drive moisture toward the mat core, generating internal steam pressure to accelerate resin flow and penetration.
Eliminated Cold-Core Effect:
Direct internal heating removes thermal lag in conventional pressing where core temperatures lag behind surfaces.
1. Core Benefits
Doubled Production Capacity:
Line speed increases from 1.2 m/min to 2.5 m/min (for 20mm boards), enabling annual output > 500,000 m³.
Enhanced Quality:
Internal Bond (IB) strength increases by 15-20% (resin cure degree >98%)
Thickness tolerance tightens to ±0.15 mm (vs. ±0.3 mm conventionally)
2. Critical Challenges
Equipment Cost:
HF systems increase investment by ~30%, requiring high-stability power supplies (>100 kW/zone).
Process Control Complexity:
Moisture content fluctuations >±1% cause uneven heating, necessitating real-time laser moisture sensors (±0.2% precision).
Safety Compliance:
Electromagnetic shielding must meet IEC 61000 standards with radiation leakage <10 W/m².
Mainstream Configuration:
New-generation 8-foot OSB lines widely adopt dual-mode heating (HF + thermal oil)—HF for rapid heating, thermal oil for steady-state.
Typical Production Data:
Curing time (20mm board): 90 seconds (vs. 180-240 sec conventionally)
Energy consumption: 110 kWh/m³ (vs. 160 kWh/m³)
Resin cure degree: >98% (vs. 90-95%)
Shandong MingHung OSB&MDF Machinery Equipment is a China professional factory who specilize in manufacturering and offering Wood based panel machine, including OSB making machine, MDF making machine, and Chipboard /PB making machine.
Our factory with the advanced processing lathes, Mature production technology, and Professional engineers and technicians, and independent ability of reasearch and development, and quickly service, ensure that we have the ability to offer you the suitable and good woodworking machinery as different conditions and requires.
2007-2010
2007 -Our factory started to manufacture the full sets of OSB、PB、MDF Production line.
2013
Shandong Hungyou intelligent Equipment Industry ResearchCo..Ltd established, for plywood machinery and OSB、PB、MDF machinery research and development.The main research direction is to realize the automation of Plywood machinery.
2015
Linyi Ming Hung Trade Co.,Ltd established, the development focus has began to Foreignmarket, to service more foreign customers.
2017
Our High-end brand -ShandongMinghung OSB&MDF Machinery Equipment Manufacturing Co..Ltd established, mainly for foreign customers make the whole plant planning and design,achieve comprehensive high-end automation.
2018
Our High-end brand -Shandong MingHung Wood Machinery Co..Ltd established, mainly for foreign customers make the whole plant planning and design,achieve comprehensive high-end automation.
2022
Our factory's overseas business achieved significant growth,shipped machines to many different countriesl,ike America,Mexico,Columbia,Russia,Indonesia,Vietnam,Malaysia,Thailand,Egypt, TurkishUkraine, Romania, Portugal, Africaand others.
2024
We continue to adhere to the strategy of going global,to become one World brand.
If interested please contact us for a quote.
Our contacts:
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
1. Heating Mechanism
Electromagnetic Field Action:
A high-frequency generator (typically operating at 13.56 MHz or 27.12 MHz) creates an alternating electromagnetic field that penetrates the OSB mat.
Molecular Friction Heating:
Polar molecules within the mat (primarily water and resin) rapidly oscillate under the electromagnetic field, converting electrical energy directly into heat through friction. This achieves volumetric internal heating, unlike conventional surface-to-core thermal conduction.
2. Frequency Selection Rationale
Penetration Depth:
Lower frequencies enable deeper electromagnetic wave penetration (e.g., 27.12 MHz penetrates mats beyond 30 cm), ensuring uniform heating for thick boards.
Thermal Efficiency Optimization:
The 13.56 MHz band maximizes thermal conversion efficiency for strands with 8-12% moisture content while complying with international industrial frequency standards (ISM band).
3. Advantages Over Conventional Heating
Energy Efficiency:
Conventional thermal oil heating: 40-50% efficiency; HF heating achieves 70-85% (reduced thermal loss).
Heating Speed:
Core temperature rise to 180°C takes 15-20 seconds (vs. 60+ seconds conventionally).
1. HF System Integration
Embedded Electrode Plates:
Copper-alloy electrode plates are embedded within upper/lower heated platens, connected to HF generators to form closed electric fields penetrating the mat.
Zoned Independent Control:
Multiple HF heating zones along press length (e.g., 6-8 zones), each independently adjustable for:
Power (0-100 kW)
Frequency fine-tuning (±1 MHz)
2. Synchronized Pressure-Temperature Control
Pressure Coordination:
Full HF power in high-pressure zones (infeed) rapidly activates resin; reduced frequency in low-pressure zones (outfeed) prevents over-curing.
Closed-Loop Temperature Feedback:
Infrared sensors monitor core temperature in real-time, dynamically adjusting HF power (±2°C precision).
1. Three-Stage Curing Breakthrough
（1） Rapid Heating (0-15 sec):
HF field elevates entire mat from 20°C to 160°C, initiating resin melting (conventional heating only reaches 120°C at surfaces).
（2） Isothermal Curing (15-70 sec):
Maintains 175-185°C core temperature for complete resin cross-linking (HF continuously compensates for endothermic reaction).
（3） Decompression Setting (70-90 sec):
HF power reduced to 10% with stepped pressure release, enabling elastic recovery.
2. Time-Reduction Key Technologies
Optimized Resin Reaction Kinetics:
HF heating improves temperature uniformity to 95% (vs. 75% conventionally), eliminating localized under-curing.
Directed Moisture Migration:
Electromagnetic fields drive moisture toward the mat core, generating internal steam pressure to accelerate resin flow and penetration.
Eliminated Cold-Core Effect:
Direct internal heating removes thermal lag in conventional pressing where core temperatures lag behind surfaces.
1. Core Benefits
Doubled Production Capacity:
Line speed increases from 1.2 m/min to 2.5 m/min (for 20mm boards), enabling annual output > 500,000 m³.
Enhanced Quality:
Internal Bond (IB) strength increases by 15-20% (resin cure degree >98%)
Thickness tolerance tightens to ±0.15 mm (vs. ±0.3 mm conventionally)
2. Critical Challenges
Equipment Cost:
HF systems increase investment by ~30%, requiring high-stability power supplies (>100 kW/zone).
Process Control Complexity:
Moisture content fluctuations >±1% cause uneven heating, necessitating real-time laser moisture sensors (±0.2% precision).
Safety Compliance:
Electromagnetic shielding must meet IEC 61000 standards with radiation leakage <10 W/m².
Mainstream Configuration:
New-generation 8-foot OSB lines widely adopt dual-mode heating (HF + thermal oil)—HF for rapid heating, thermal oil for steady-state.
Typical Production Data:
Curing time (20mm board): 90 seconds (vs. 180-240 sec conventionally)
Energy consumption: 110 kWh/m³ (vs. 160 kWh/m³)
Resin cure degree: >98% (vs. 90-95%)
Shandong MingHung OSB&MDF Machinery Equipment is a China professional factory who specilize in manufacturering and offering Wood based panel machine, including OSB making machine, MDF making machine, and Chipboard /PB making machine.
Our factory with the advanced processing lathes, Mature production technology, and Professional engineers and technicians, and independent ability of reasearch and development, and quickly service, ensure that we have the ability to offer you the suitable and good woodworking machinery as different conditions and requires.
2007-2010
2007 -Our factory started to manufacture the full sets of OSB、PB、MDF Production line.
2013
Shandong Hungyou intelligent Equipment Industry ResearchCo..Ltd established, for plywood machinery and OSB、PB、MDF machinery research and development.The main research direction is to realize the automation of Plywood machinery.
2015
Linyi Ming Hung Trade Co.,Ltd established, the development focus has began to Foreignmarket, to service more foreign customers.
2017
Our High-end brand -ShandongMinghung OSB&MDF Machinery Equipment Manufacturing Co..Ltd established, mainly for foreign customers make the whole plant planning and design,achieve comprehensive high-end automation.
2018
Our High-end brand -Shandong MingHung Wood Machinery Co..Ltd established, mainly for foreign customers make the whole plant planning and design,achieve comprehensive high-end automation.
2022
Our factory's overseas business achieved significant growth,shipped machines to many different countriesl,ike America,Mexico,Columbia,Russia,Indonesia,Vietnam,Malaysia,Thailand,Egypt, TurkishUkraine, Romania, Portugal, Africaand others.
2024
We continue to adhere to the strategy of going global,to become one World brand.
If interested please contact us for a quote.
Our contacts:
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
