MH-CHP
MINGHUNG
 | Technical Principle: Precision Control of Dynamic Pressure Profile |
A customizable pressure profile means the press can be divided into multiple independent pressure control zones along its length. The pressure in each zone can be set independently, collectively forming a dynamic pressure program "tailor-made" for a specific product.
An optimized pressure profile for 40mm thick panel production typically includes four key stages:
1. Stage 1: Initial Pre-pressing & Deaeration Zone (Infeed Section)
Pressure Setting: Medium-low pressure.
Function: This stage does not aim for instant high pressure but uses moderate pressure to preliminarily compress the loose mat and expel most internal air. It also allows the thick mat to be "nipped" into the press smoothly, reducing mechanical shock and mat feeding issues.
2. Stage 2: Core Compaction & Plasticization Zone (Mid-Front Section)
Pressure Setting: Rapidly increases to and maintains Maximum Pressure.
Function: After preheating and deaeration, maximum pressure is applied to force strands/fibers into close contact, eliminating voids. This ensures efficient heat transfer to the core and initiates lignin plasticization, creating optimal conditions for resin bonding. This is the most critical stage for overall density and strength.
3. Stage 3: Pressure Ramp-Down & Setting Zone (Mid-Rear Section)
Pressure Setting: Stepwise, gradual pressure reduction.
Function: As the core reaches temperature and resin begins to cure, pressure is gradually reduced. This allows residual steam and volatiles to escape smooth and steady, preventing "blows" or internal blisters. The slow reduced pressure process is key to releasing internal stress and reducing springback.
4. Stage 4: Pressure Stabilization & Final Curing Zone (Outlet Section)
Pressure Setting: Low maintenance pressure.
Function: In the final curing stage, only low pressure is needed to maintain panel shape, suppress expansion from internal stress, and ensure the panel completes curing in a stable state, achieving excellent dimensional stability.
Through this meticulously designed, dynamic "pressure mountain range," the press intelligently guides the mat from a loose state to a solid panel.
| Working Principle of the Continuous Press |
The working principle of a continuous press can be summarized as follows: The mat is continuously conveyed, sandwiched between two massive steel belts, through an enclosed "tunnel" that integrates heating, pressing, and curing functions, transforming from loose material into a solid panel while in motion.
The detailed process is as follows:
1. Forming and Infeed
Prepared raw materials form a continuous, uniform "mat" on a moving steel belt via a forming station.
This mat is fed smoothly into the inlet of the continuous press.
2. Steel Belt Transport and Synchronization
Two parallel, endless heavy-duty steel belts tightly sandwich the mat from above and below.
Driven by the main drive rolls, the belts run synchronously at a set speed, ensuring the mat is transported without distortion or misalignment.
3. Pressing Zone - The Core Forming Process
This is the heart of the press. The steel belts carrying the mat enter a pressing zone consisting of a series of heated platens.
Heating: The platens, internally circulated with high-temperature thermal oil or steam, transfer heat continuously and evenly through the steel belts to the mat.
Pressing: Numerous support rollers or pressure cylinders above and below the steel belts apply enormous, precisely controlled pressure to the mat.
Customizable Pressure Profile: As discussed, the press is divided into multiple pressure zones along its length. An intelligent hydraulic system allows precise programming of the pressure in each zone, creating an optimized pressure profile, perfectly adapted for curing 40mm thick boards.
4. Curing and Forming
Under the combined action of high temperature and pressure, moisture within the mat evaporates, the resin melts and undergoes cross-linking, and lignin plasticizes, ultimately bonding the loose raw materials into a solid, integrated panel.
This entire process is continuous; the mat undergoes physical and chemical changes while moving.
5. Outfeed and Post-Processing
The fully cured panel exits the press as a continuous "panel strip".
This continuous strip is then trimmed and cross-cut to the required final dimensions by sawing systems before proceeding to cooling and stacking stations.
Key Feature: Compared to intermittent presses, continuous presses enable non-stop production, offering significant advantages in high output, consistent quality, low energy consumption, and high automation.
| Core Components of the Continuous Press |
This massive equipment can be viewed as an integration of several precision subsystems working in concert. Its main components include:
1. Frame & Base Structure
Function: The "skeleton" of the entire press, made from high-strength steel plates. It supports all moving parts and withstands pressing forces. It must be extremely robust and stable to ensure pressing precision.
2. Steel Belt System
Function: Acts as the "mobile mold," responsible for transporting the mat and transferring heat and pressure.
Includes:
Two Endless Steel Belts: Made of special alloy steel, resistant to high temperature and high strength.
Drive Rolls: Provide the motive power for belt movement.
Tensioning Device: Maintains constant belt tension to prevent slippage and misalignment.
Alignment System: Automatically monitors and adjusts belt position to ensure stable operation.
3. Heating System
Function: Provides the heat required for mat curing.
Includes:
Heating Platens: Located inside the steel belts, featuring internal channels; they are the direct heat exchangers.
Heating Unit: Such as a thermal oil heater or steam boiler, responsible for heating the thermal medium.
Circulation Pumps & Piping: Transport the high-temperature medium to the various platens.
4. Hydraulic System
Function: The "muscles" of the press, generating and precisely controlling the pressure required for pressing. This is key to achieving the customizable pressure profile.
Includes:
Main Hydraulic Power Unit: The power source.
Hydraulic Cylinders / Servo Valves: The actuators that apply pressure. High-response servo valves are core to achieving precise pressure control.
Control Manifolds & Piping: Direct and control the flow of hydraulic fluid.
5. Roller System
Function: Supports the steel belts, transfers pressure, and guides their movement.
Includes: A vast number of support rollers, guide rollers, etc., densely distributed between the steel belts and platens to ensure even pressure distribution and reduce belt friction and deformation.
6. Infeed and Outfeed Devices
Infeed Device: Ensures the mat enters the press smoothly and correctly synchronized, often including a pre-press and synchronized feeder.
Outfeed Device: Receives and conveys the hot, pressed panel strip.
7. Automated Control System
Function: The "brain and nervous system" of the entire press.
Includes:
Central PLC: Receives signals from all sensors and automatically regulates all actuators based on preset process recipes.
Human-Machine Interface: Operators monitor the entire process, set parameters, and call up recipes via the touchscreen.
Sensor Network: The "eyes and ears" scattered throughout the equipment, collecting real-time data.
| Technical Components Enabling Customizable Pressure Profile |
1. High-Precision, High-Response Hydraulic Servo System
The "muscle" of the system. It uses servo-driven hydraulic pumps or proportional servo valves for millisecond-level, stepless adjustment of cylinder pressure, enabling smooth execution of complex profile setpoints.
2. Distributed Pressure & Position Sensor Network
Numerous high-precision pressure and displacement sensors along the press length monitor real-time pressure and panel thickness, providing continuous feedback to the control system.
3. Intelligent Central Controller (PLC & HMI)
The "brain" of the system. A high-performance PLC stores hundreds of pressure recipes for different products. It issues real-time commands to the hydraulic system based on the preset profile and sensor feedback, ensuring precise closed-loop control.
Operators can easily call, edit, and store recipes via the Touchscreen HMI, enabling "one-touch" product changeover.
4. Robust Mechanical Structure & Roller System
Reinforced press frame, heating platens, and support rollers withstand the immense loads from 40mm panel production, ensuring minimal deformation under high pressure and providing a stable platform for precise control.
| Advantages & Value Delivered to Customers |
Revolutionary Thick Panel Quality:
Superior Internal Bond Strength: Effective pressure transfer ensures consistent bonding from surface to core, drastically improving IB values.
Exceptional Dimensional Stability: Optimized pressure ramp-down releases internal stress, markedly reducing springback and ensuring precise thickness control.
Uniform Density Distribution: Achieves an ideal density gradient from surface to core,completely solve the "soft-heartedness" problem.
Unparalleled Process Flexibility:
"One Product, One Profile": The optimal pressure profile can be customized for panels made from different raw materials, thicknesses, and density requirements, enabling true flexible manufacturing.
Rapid Recipe Changeover: Switching products is done by calling the corresponding pressure recipe with one click, drastically reducing setup time and transition waste.
Enhanced Production Efficiency & Economic Benefits:
Reduced Rejection Rate: Precise pressure control virtually eliminates defects like delamination and blistering caused by improper pressure.
Optimized Energy Consumption: Pressure is applied on demand, avoiding the energy waste of maintaining ultra-high pressure throughout the entire press cycle.
Market Expansion Capability: Enables stable production of high-end, ultra-thick specialty panels, allowing entry into high-margin segments like container flooring and structural panels, gaining a competitive edge.
| Our Company |
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.
MINGHUNG product series include medium density fiberboard (MDF), high density fiberboard (HDF), particle board (PB), oriented strand board (OSB), veneerable super strong particle board (LSB) multi-layer heat press production line, double-sided fixed thickness broadband Sanding machine, gauge saw, mechanical paving machine, air flow paving machine, channel dryer, super screen, post-processing system artificial panel cooling system, turning machine, stacker, storage and transportation trolley. etc. For artificial panel equipment mainly involved in particleboard, medium density fiberboard, oriented strand board, multilayer plywood machinery.
For more information, welcome contact us, we will reply you quickly and offer working videos with you.
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
| Technical Principle: Precision Control of Dynamic Pressure Profile |
A customizable pressure profile means the press can be divided into multiple independent pressure control zones along its length. The pressure in each zone can be set independently, collectively forming a dynamic pressure program "tailor-made" for a specific product.
An optimized pressure profile for 40mm thick panel production typically includes four key stages:
1. Stage 1: Initial Pre-pressing & Deaeration Zone (Infeed Section)
Pressure Setting: Medium-low pressure.
Function: This stage does not aim for instant high pressure but uses moderate pressure to preliminarily compress the loose mat and expel most internal air. It also allows the thick mat to be "nipped" into the press smoothly, reducing mechanical shock and mat feeding issues.
2. Stage 2: Core Compaction & Plasticization Zone (Mid-Front Section)
Pressure Setting: Rapidly increases to and maintains Maximum Pressure.
Function: After preheating and deaeration, maximum pressure is applied to force strands/fibers into close contact, eliminating voids. This ensures efficient heat transfer to the core and initiates lignin plasticization, creating optimal conditions for resin bonding. This is the most critical stage for overall density and strength.
3. Stage 3: Pressure Ramp-Down & Setting Zone (Mid-Rear Section)
Pressure Setting: Stepwise, gradual pressure reduction.
Function: As the core reaches temperature and resin begins to cure, pressure is gradually reduced. This allows residual steam and volatiles to escape smooth and steady, preventing "blows" or internal blisters. The slow reduced pressure process is key to releasing internal stress and reducing springback.
4. Stage 4: Pressure Stabilization & Final Curing Zone (Outlet Section)
Pressure Setting: Low maintenance pressure.
Function: In the final curing stage, only low pressure is needed to maintain panel shape, suppress expansion from internal stress, and ensure the panel completes curing in a stable state, achieving excellent dimensional stability.
Through this meticulously designed, dynamic "pressure mountain range," the press intelligently guides the mat from a loose state to a solid panel.
| Working Principle of the Continuous Press |
The working principle of a continuous press can be summarized as follows: The mat is continuously conveyed, sandwiched between two massive steel belts, through an enclosed "tunnel" that integrates heating, pressing, and curing functions, transforming from loose material into a solid panel while in motion.
The detailed process is as follows:
1. Forming and Infeed
Prepared raw materials form a continuous, uniform "mat" on a moving steel belt via a forming station.
This mat is fed smoothly into the inlet of the continuous press.
2. Steel Belt Transport and Synchronization
Two parallel, endless heavy-duty steel belts tightly sandwich the mat from above and below.
Driven by the main drive rolls, the belts run synchronously at a set speed, ensuring the mat is transported without distortion or misalignment.
3. Pressing Zone - The Core Forming Process
This is the heart of the press. The steel belts carrying the mat enter a pressing zone consisting of a series of heated platens.
Heating: The platens, internally circulated with high-temperature thermal oil or steam, transfer heat continuously and evenly through the steel belts to the mat.
Pressing: Numerous support rollers or pressure cylinders above and below the steel belts apply enormous, precisely controlled pressure to the mat.
Customizable Pressure Profile: As discussed, the press is divided into multiple pressure zones along its length. An intelligent hydraulic system allows precise programming of the pressure in each zone, creating an optimized pressure profile, perfectly adapted for curing 40mm thick boards.
4. Curing and Forming
Under the combined action of high temperature and pressure, moisture within the mat evaporates, the resin melts and undergoes cross-linking, and lignin plasticizes, ultimately bonding the loose raw materials into a solid, integrated panel.
This entire process is continuous; the mat undergoes physical and chemical changes while moving.
5. Outfeed and Post-Processing
The fully cured panel exits the press as a continuous "panel strip".
This continuous strip is then trimmed and cross-cut to the required final dimensions by sawing systems before proceeding to cooling and stacking stations.
Key Feature: Compared to intermittent presses, continuous presses enable non-stop production, offering significant advantages in high output, consistent quality, low energy consumption, and high automation.
| Core Components of the Continuous Press |
This massive equipment can be viewed as an integration of several precision subsystems working in concert. Its main components include:
1. Frame & Base Structure
Function: The "skeleton" of the entire press, made from high-strength steel plates. It supports all moving parts and withstands pressing forces. It must be extremely robust and stable to ensure pressing precision.
2. Steel Belt System
Function: Acts as the "mobile mold," responsible for transporting the mat and transferring heat and pressure.
Includes:
Two Endless Steel Belts: Made of special alloy steel, resistant to high temperature and high strength.
Drive Rolls: Provide the motive power for belt movement.
Tensioning Device: Maintains constant belt tension to prevent slippage and misalignment.
Alignment System: Automatically monitors and adjusts belt position to ensure stable operation.
3. Heating System
Function: Provides the heat required for mat curing.
Includes:
Heating Platens: Located inside the steel belts, featuring internal channels; they are the direct heat exchangers.
Heating Unit: Such as a thermal oil heater or steam boiler, responsible for heating the thermal medium.
Circulation Pumps & Piping: Transport the high-temperature medium to the various platens.
4. Hydraulic System
Function: The "muscles" of the press, generating and precisely controlling the pressure required for pressing. This is key to achieving the customizable pressure profile.
Includes:
Main Hydraulic Power Unit: The power source.
Hydraulic Cylinders / Servo Valves: The actuators that apply pressure. High-response servo valves are core to achieving precise pressure control.
Control Manifolds & Piping: Direct and control the flow of hydraulic fluid.
5. Roller System
Function: Supports the steel belts, transfers pressure, and guides their movement.
Includes: A vast number of support rollers, guide rollers, etc., densely distributed between the steel belts and platens to ensure even pressure distribution and reduce belt friction and deformation.
6. Infeed and Outfeed Devices
Infeed Device: Ensures the mat enters the press smoothly and correctly synchronized, often including a pre-press and synchronized feeder.
Outfeed Device: Receives and conveys the hot, pressed panel strip.
7. Automated Control System
Function: The "brain and nervous system" of the entire press.
Includes:
Central PLC: Receives signals from all sensors and automatically regulates all actuators based on preset process recipes.
Human-Machine Interface: Operators monitor the entire process, set parameters, and call up recipes via the touchscreen.
Sensor Network: The "eyes and ears" scattered throughout the equipment, collecting real-time data.
| Technical Components Enabling Customizable Pressure Profile |
1. High-Precision, High-Response Hydraulic Servo System
The "muscle" of the system. It uses servo-driven hydraulic pumps or proportional servo valves for millisecond-level, stepless adjustment of cylinder pressure, enabling smooth execution of complex profile setpoints.
2. Distributed Pressure & Position Sensor Network
Numerous high-precision pressure and displacement sensors along the press length monitor real-time pressure and panel thickness, providing continuous feedback to the control system.
3. Intelligent Central Controller (PLC & HMI)
The "brain" of the system. A high-performance PLC stores hundreds of pressure recipes for different products. It issues real-time commands to the hydraulic system based on the preset profile and sensor feedback, ensuring precise closed-loop control.
Operators can easily call, edit, and store recipes via the Touchscreen HMI, enabling "one-touch" product changeover.
4. Robust Mechanical Structure & Roller System
Reinforced press frame, heating platens, and support rollers withstand the immense loads from 40mm panel production, ensuring minimal deformation under high pressure and providing a stable platform for precise control.
| Advantages & Value Delivered to Customers |
Revolutionary Thick Panel Quality:
Superior Internal Bond Strength: Effective pressure transfer ensures consistent bonding from surface to core, drastically improving IB values.
Exceptional Dimensional Stability: Optimized pressure ramp-down releases internal stress, markedly reducing springback and ensuring precise thickness control.
Uniform Density Distribution: Achieves an ideal density gradient from surface to core,completely solve the "soft-heartedness" problem.
Unparalleled Process Flexibility:
"One Product, One Profile": The optimal pressure profile can be customized for panels made from different raw materials, thicknesses, and density requirements, enabling true flexible manufacturing.
Rapid Recipe Changeover: Switching products is done by calling the corresponding pressure recipe with one click, drastically reducing setup time and transition waste.
Enhanced Production Efficiency & Economic Benefits:
Reduced Rejection Rate: Precise pressure control virtually eliminates defects like delamination and blistering caused by improper pressure.
Optimized Energy Consumption: Pressure is applied on demand, avoiding the energy waste of maintaining ultra-high pressure throughout the entire press cycle.
Market Expansion Capability: Enables stable production of high-end, ultra-thick specialty panels, allowing entry into high-margin segments like container flooring and structural panels, gaining a competitive edge.
| Our Company |
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.
MINGHUNG product series include medium density fiberboard (MDF), high density fiberboard (HDF), particle board (PB), oriented strand board (OSB), veneerable super strong particle board (LSB) multi-layer heat press production line, double-sided fixed thickness broadband Sanding machine, gauge saw, mechanical paving machine, air flow paving machine, channel dryer, super screen, post-processing system artificial panel cooling system, turning machine, stacker, storage and transportation trolley. etc. For artificial panel equipment mainly involved in particleboard, medium density fiberboard, oriented strand board, multilayer plywood machinery.
For more information, welcome contact us, we will reply you quickly and offer working videos with you.
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
