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MINGHUNG
This production line is a technologically advanced, highly automated turnkey project specifically designed for the large-scale manufacturing of high-quality 16mm sound-insulating Medium-Density Fiberboard (MDF). The entire line is engineered around the concepts of efficiency, stability, and energy conservation, ensuring the achievement of an annual output target of 120,000 cubic meters.
Production Equipment
 | I. Raw Material Preparation Section |
1. Chiping & Screening System: Utilizes a large-scale drum chipper to process raw logs, branch wood, or wood chips. It is followed by a swinging screen and a re-crusher to separate qualified chips from oversized particles, ensuring uniform chip size for the next stage.
2. Chip Storage & Metering System: Equipped with large silos and precise belt scales for continuous and stable chip supply, providing a data foundation for subsequent formulation.
| II. Fiber Preparation Section (Core) |
1. Defibrator System: The heart of the production line. A large continuous defibrator (refiner) is used to soften chips with high-temperature, high-pressure steam before refining them into high-quality wood fibers throug precision grinding discs. This stage is critical for determining fiber quality and the final board's properties.
2. Resin Blending & Drying System:
Blending: A high-speed pneumatic blending system in the pipeline ensures thorough and uniform mixing of fibers with environmentally friendly urea-formaldehyde (UF) or MDI resin, along with specialized sound-insulating additives (e.g., mineral fillers, damping materials).
Drying: A large rotary drum dryer uses hot air to rapidly reduce the moisture content of the fibers to the required range for forming.
blender
dryer
| III. Forming & Pre-Pressing Section |
1. Forming Station: Employs an advanced mechanical or pneumatic fiber forming machine to evenly distribute resinated and dried fibers into a continuous, consistent-thickness mat. The precision of this equipment directly determines the density uniformity and thickness tolerance of the finished board.
2. Pre-Press: The mat enters a continuous belt pre-press for initial compaction, which increases its strength for transportation and removes entrapped air to prevent blistering during hot pressing.
forming machine
pre press machine for MDF
| IV. Hot Pressing & Finishing Section |
1. Continuous Flat Press: The core and most significant investment of the line. A multi-opening continuous flat press uses precisely controlled temperature, pressure, and time profiles to cure the mat into a solid board while moving continuously. It is characterized by high output, smooth surface, precise thickness, and uniform density distribution, making it ideal for producing large-format standard boards.
2. Cooling & Trimming System: The pressed boards pass through a star cooler for uniform cooling and setting. They are then precisely cut to required rough sizes by cross-cutting and edge-trimming saws.
3. Sanding System: A heavy-duty, multi-head (typically 6-8 heads) calibrating sander performs fine grinding on the top and bottom surfaces of the board. This ensures precise thickness and a perfectly smooth surface, providing an ideal substrate for subsequent laminating or direct use.
continuous belt press
edge cutter
MDF sanding machine
| V. Automation & Control System |
The entire line is controlled by a central PLC (Programmable Logic Controller) and computer system integrated into a control room. It enables automated monitoring and adjustment of the entire process—from raw material ratio, refining parameters, resin dosage, and mat density to press cycles—guaranteeing production stability and consistent product quality.
| Line Features Summary |
High-Capacity Design: Core equipment (refiner, dryer, press) is selected and matched for the 120,000 m³/year capacity.
Excellent Sound Insulation: The dedicated blending system ensures uniform addition of sound-insulating additives, which is the technical guarantee for the superior acoustic performance (high sound resistance) of the 16mm boards.
High Automation: Reduces labor costs and improves production efficiency and product consistency.
Energy Efficient & Eco-Friendly: Incorporates energy recovery systems (e.g., heat recovery from the press, exhaust gas treatment from the dryer), complying with environmental standards.
The production process for 16mm sound-insulating MDF builds upon the standard MDF manufacturing process, with the core addition of applying sound-insulating additives and adjustments in equipment and process to meet its higher density and performance requirements. The entire process is highly automated and consists of the following steps:
| Phase 1: Raw Material Preparation |
1. Chipping: Wood (logs, branches, recycled wood, etc.) is fed into a large-scale drum chipper to produce uniform process chips.
2. Screening & Washing: The chips are passed through screening equipment to remove oversized chunks (which are sent back for re-chipping) and fine fines (which can be used as fuel). Qualified chips are washed to remove impurities like sand and metals, ensuring subsequent processing quality and equipment safety.
| Phase 2: Fiber Preparation - 【Key Sound Insulation Step】 |
3. Refining: Clean chips are sent to a pre-heater, softened by high-pressure steam, and then enter the defibrator (refiner). Here, chips are separated into coarse fibers and then refined into fine wood fibers.
4. Resin & Additive Blending: This is the core step for producing sound-insulating boards. The dried fibers are uniformly mixed in a high-speed pneumatic piping system with the following materials:
Binder: Environmental-friendly Urea-Formaldehyde (UF) or Methyl Diphenyl Diisocyanate (MDI) resin.
Additives: Such as hardeners and water repellents.
Sound-Insulating Additives: Specialized mineral fillers (e.g., quartz powder, barium sulfate), damping materials, or other polymer compounds. These high-density fillers effectively increase board mass, block sound wave transmission, and enhance acoustic performance.
5. Fiber Drying: The fibers, now coated with resin and additives, enter a rotary drying pipeline where they are rapidly dried by hot air to the appropriate moisture content for forming.
| Phase 3: Mat Forming & Pre-pressing |
6. Forming: The dried fibers are distributed evenly by an advanced mechanical or pneumatic forming machine onto a moving steel belt, forming a continuous, uniform-thickness "fluffy" mat. Forming accuracy is critical for a 16mm thick board.
7. Pre-pressing: The fluffy mat first enters a pre-press, where it is initially compacted at room temperature into a mat strip with certain strength. Pre-pressing removes air, reduces thickness for easier transport, and prevents blowouts during hot pressing.
| Phase 4: Hot Pressing & Curing |
8. Hot Pressing: This is the key forming process step. The mat strip is cut to the required length and fed into a continuous flat press. Under high temperature (200-250°C) and high pressure (several tens of MPa), the resin in the fibers rapidly cures, firmly bonding the wood fibers and sound-insulating additives into a solid board. Precisely controlled pressure, temperature, and speed profiles ensure high thickness accuracy and uniform density throughout the 16mm board.
| Phase 5: Finishing & Processing |
9. Cooling & Trimming: The pressed board is very hot and must enter a cooler/stacker for even cooling to release internal stress and stabilize dimensions. The cooled boards are then cut to standard sizes by cross-cut and edge-trimming saws.
10. Sanding: The boards are sent through a multi-head (usually 6-8 heads) heavy-duty calibrating sander. Sanding removes the pre-cured layer, corrects thickness deviations, and creates an extremely smooth and flat surface, providing a perfect substrate for subsequent laminating, painting, or direct use.
11. Inspection & Packaging: Finally, the boards undergo strict quality inspection (thickness, density, flatness, MOR, formaldehyde emissions, and spot check of sound insulation performance). Qualified products are automatically stacked, packaged, labeled, and stored for sale.
The raw material system for producing sound-insulating MDF is based on standard MDF, with the core addition of high-density, high-weight-ratio sound-insulating fillers. The main raw materials are divided into the following categories:
I. Core Fiber Material (Wood Fiber)
This forms the matrix of the board, providing basic mechanical strength and structure.
1. Wood Raw Material:
Types: Softwoods (e.g., pine, fir), hardwoods (e.g., eucalyptus, poplar, oak), or a mixture of both. Fast-growing plantation wood, wood processing residues (e.g., scraps, shavings), or recycled wood are commonly used.
Characteristics:
Softwoods: Longer fibers provide better internal bond strength, resulting in boards with better toughness.
Hardwoods: Shorter fibers create a finer board structure with a smoother surface and higher flatness.
Mixed Use: Balances board strength, surface quality, and cost.
Recycled Wood: Low cost, environmentally friendly, but requires strict control of impurity content to ensure quality.
popla
pine
eucalyptus
2. Non-wood plant fibers:
Types: Bamboo, sugarcane residue, straw, cotton stalks, etc.
Characteristics:
Environmentally friendly and renewable, it is a good alternative to wood resources.
The characteristics of different fibers vary greatly, and the production process parameters need to be adjusted.
bamboo
cornstalk
reed
II. Binder
Its role is to firmly bond the loose fibers together, creating the strength of the board.
1. Urea-Formaldehyde (UF) Resin:
Characteristics: The lowest cost and most widely used adhesive. Fast curing speed and good bonding performance.
2. Isocyanate (MDI) Resin:
Characteristics:
No Added Formaldehyde: Contains no formaldehyde, offering excellent environmental performance. It is the preferred choice for high-end, eco-friendly MDF boards.
High Bonding Strength: Excellent adhesion to both wood and fillers, particularly suitable for sound-insulating boards containing large amounts of mineral fillers, preventing dusting.
Good Water Resistance: Significantly improves the board's moisture resistance.
III. Sound-Insulating Additives - 【Core Functional Materials】
These are the key to imparting excellent sound insulation performance to MDF boards. The core principle is to increase the surface density (mass per unit area) of the board, following the "mass law" – greater mass leads to better sound insulation.
1. Mineral Fillers:
Types: Barium sulfate (barite powder), quartz sand, limestone powder (calcium carbonate), kaolin, etc.
Characteristics:
High Density: This is the most important characteristic. For example, the density of barium sulfate (4.5 g/cm³) is much higher than that of wood fiber (~1.5 g/cm³), allowing a small amount to significantly increase the board's weight.
Inert: Chemically stable, does not affect adhesive curing.
Filling: Effectively fills the voids between fibers, creating a denser board structure and reducing paths for sound wave transmission.
Cost-Performance Balance: Barium sulfate is most effective but costly; quartz sand and limestone powder are lower-cost, common compromises.
2. Damping Materials:
Types: Rubber powder, asphalt-based materials, polymers, etc.
Characteristics:
Vibration Absorption: Effectively converts sound energy into heat, dissipating the energy of mid-to-low frequency sound waves, reducing board vibration caused by sound waves and secondary radiation noise.
Composite Effect: Often used in combination with mineral fillers to simultaneously improve both sound insulation (blocking) and absorption (dissipation) performance.
IV. Other Additives
1. Water Repellent: Usually paraffin emulsion, used to improve the board's water and moisture resistance.
2. Hardener: Used to accelerate the curing of UF resin, improving production efficiency.
3. Flame Retardants: Such as aluminum hydroxide, magnesium hydroxide, used to produce MDF boards with both sound-insulating and flame-retardant functions.
Summary:
The core of the raw material formulation for producing high-quality sound-insulating MDF lies in:
Wood fiber as the base structure.
MDI resin as the guarantee for environmental friendliness and high-performance bonding.
High-density mineral fillers (e.g., barium sulfate) as the key to achieving high sound transmission loss (STL).
Who We Are
Shandong MINGHUNG OSB&MDF Machinery Equipment Manufacturing Co.,Ltd. was founded in 1983, specializes in continuous press solutions for over 40 years.
MINGHUNG is a leading company in the industry of OSB&MDF making machine. With a strongfocus on producing high-quality machinery, we specialize in manufacturing thecomplete production line of Medium density fiberboard (MDF), High densityfiberboard (HDF),Particle board (PB), Oriented strand board (OSB) , Veneerable super strong particle board (LSB),Laminated board and veneer.
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
This production line is a technologically advanced, highly automated turnkey project specifically designed for the large-scale manufacturing of high-quality 16mm sound-insulating Medium-Density Fiberboard (MDF). The entire line is engineered around the concepts of efficiency, stability, and energy conservation, ensuring the achievement of an annual output target of 120,000 cubic meters.
Production Equipment
| I. Raw Material Preparation Section |
1. Chiping & Screening System: Utilizes a large-scale drum chipper to process raw logs, branch wood, or wood chips. It is followed by a swinging screen and a re-crusher to separate qualified chips from oversized particles, ensuring uniform chip size for the next stage.
2. Chip Storage & Metering System: Equipped with large silos and precise belt scales for continuous and stable chip supply, providing a data foundation for subsequent formulation.
| II. Fiber Preparation Section (Core) |
1. Defibrator System: The heart of the production line. A large continuous defibrator (refiner) is used to soften chips with high-temperature, high-pressure steam before refining them into high-quality wood fibers throug precision grinding discs. This stage is critical for determining fiber quality and the final board's properties.
2. Resin Blending & Drying System:
Blending: A high-speed pneumatic blending system in the pipeline ensures thorough and uniform mixing of fibers with environmentally friendly urea-formaldehyde (UF) or MDI resin, along with specialized sound-insulating additives (e.g., mineral fillers, damping materials).
Drying: A large rotary drum dryer uses hot air to rapidly reduce the moisture content of the fibers to the required range for forming.
blender
dryer
| III. Forming & Pre-Pressing Section |
1. Forming Station: Employs an advanced mechanical or pneumatic fiber forming machine to evenly distribute resinated and dried fibers into a continuous, consistent-thickness mat. The precision of this equipment directly determines the density uniformity and thickness tolerance of the finished board.
2. Pre-Press: The mat enters a continuous belt pre-press for initial compaction, which increases its strength for transportation and removes entrapped air to prevent blistering during hot pressing.
forming machine
pre press machine for MDF
| IV. Hot Pressing & Finishing Section |
1. Continuous Flat Press: The core and most significant investment of the line. A multi-opening continuous flat press uses precisely controlled temperature, pressure, and time profiles to cure the mat into a solid board while moving continuously. It is characterized by high output, smooth surface, precise thickness, and uniform density distribution, making it ideal for producing large-format standard boards.
2. Cooling & Trimming System: The pressed boards pass through a star cooler for uniform cooling and setting. They are then precisely cut to required rough sizes by cross-cutting and edge-trimming saws.
3. Sanding System: A heavy-duty, multi-head (typically 6-8 heads) calibrating sander performs fine grinding on the top and bottom surfaces of the board. This ensures precise thickness and a perfectly smooth surface, providing an ideal substrate for subsequent laminating or direct use.
continuous belt press
edge cutter
MDF sanding machine
| V. Automation & Control System |
The entire line is controlled by a central PLC (Programmable Logic Controller) and computer system integrated into a control room. It enables automated monitoring and adjustment of the entire process—from raw material ratio, refining parameters, resin dosage, and mat density to press cycles—guaranteeing production stability and consistent product quality.
| Line Features Summary |
High-Capacity Design: Core equipment (refiner, dryer, press) is selected and matched for the 120,000 m³/year capacity.
Excellent Sound Insulation: The dedicated blending system ensures uniform addition of sound-insulating additives, which is the technical guarantee for the superior acoustic performance (high sound resistance) of the 16mm boards.
High Automation: Reduces labor costs and improves production efficiency and product consistency.
Energy Efficient & Eco-Friendly: Incorporates energy recovery systems (e.g., heat recovery from the press, exhaust gas treatment from the dryer), complying with environmental standards.
The production process for 16mm sound-insulating MDF builds upon the standard MDF manufacturing process, with the core addition of applying sound-insulating additives and adjustments in equipment and process to meet its higher density and performance requirements. The entire process is highly automated and consists of the following steps:
| Phase 1: Raw Material Preparation |
1. Chipping: Wood (logs, branches, recycled wood, etc.) is fed into a large-scale drum chipper to produce uniform process chips.
2. Screening & Washing: The chips are passed through screening equipment to remove oversized chunks (which are sent back for re-chipping) and fine fines (which can be used as fuel). Qualified chips are washed to remove impurities like sand and metals, ensuring subsequent processing quality and equipment safety.
| Phase 2: Fiber Preparation - 【Key Sound Insulation Step】 |
3. Refining: Clean chips are sent to a pre-heater, softened by high-pressure steam, and then enter the defibrator (refiner). Here, chips are separated into coarse fibers and then refined into fine wood fibers.
4. Resin & Additive Blending: This is the core step for producing sound-insulating boards. The dried fibers are uniformly mixed in a high-speed pneumatic piping system with the following materials:
Binder: Environmental-friendly Urea-Formaldehyde (UF) or Methyl Diphenyl Diisocyanate (MDI) resin.
Additives: Such as hardeners and water repellents.
Sound-Insulating Additives: Specialized mineral fillers (e.g., quartz powder, barium sulfate), damping materials, or other polymer compounds. These high-density fillers effectively increase board mass, block sound wave transmission, and enhance acoustic performance.
5. Fiber Drying: The fibers, now coated with resin and additives, enter a rotary drying pipeline where they are rapidly dried by hot air to the appropriate moisture content for forming.
| Phase 3: Mat Forming & Pre-pressing |
6. Forming: The dried fibers are distributed evenly by an advanced mechanical or pneumatic forming machine onto a moving steel belt, forming a continuous, uniform-thickness "fluffy" mat. Forming accuracy is critical for a 16mm thick board.
7. Pre-pressing: The fluffy mat first enters a pre-press, where it is initially compacted at room temperature into a mat strip with certain strength. Pre-pressing removes air, reduces thickness for easier transport, and prevents blowouts during hot pressing.
| Phase 4: Hot Pressing & Curing |
8. Hot Pressing: This is the key forming process step. The mat strip is cut to the required length and fed into a continuous flat press. Under high temperature (200-250°C) and high pressure (several tens of MPa), the resin in the fibers rapidly cures, firmly bonding the wood fibers and sound-insulating additives into a solid board. Precisely controlled pressure, temperature, and speed profiles ensure high thickness accuracy and uniform density throughout the 16mm board.
| Phase 5: Finishing & Processing |
9. Cooling & Trimming: The pressed board is very hot and must enter a cooler/stacker for even cooling to release internal stress and stabilize dimensions. The cooled boards are then cut to standard sizes by cross-cut and edge-trimming saws.
10. Sanding: The boards are sent through a multi-head (usually 6-8 heads) heavy-duty calibrating sander. Sanding removes the pre-cured layer, corrects thickness deviations, and creates an extremely smooth and flat surface, providing a perfect substrate for subsequent laminating, painting, or direct use.
11. Inspection & Packaging: Finally, the boards undergo strict quality inspection (thickness, density, flatness, MOR, formaldehyde emissions, and spot check of sound insulation performance). Qualified products are automatically stacked, packaged, labeled, and stored for sale.
The raw material system for producing sound-insulating MDF is based on standard MDF, with the core addition of high-density, high-weight-ratio sound-insulating fillers. The main raw materials are divided into the following categories:
I. Core Fiber Material (Wood Fiber)
This forms the matrix of the board, providing basic mechanical strength and structure.
1. Wood Raw Material:
Types: Softwoods (e.g., pine, fir), hardwoods (e.g., eucalyptus, poplar, oak), or a mixture of both. Fast-growing plantation wood, wood processing residues (e.g., scraps, shavings), or recycled wood are commonly used.
Characteristics:
Softwoods: Longer fibers provide better internal bond strength, resulting in boards with better toughness.
Hardwoods: Shorter fibers create a finer board structure with a smoother surface and higher flatness.
Mixed Use: Balances board strength, surface quality, and cost.
Recycled Wood: Low cost, environmentally friendly, but requires strict control of impurity content to ensure quality.
popla
pine
eucalyptus
2. Non-wood plant fibers:
Types: Bamboo, sugarcane residue, straw, cotton stalks, etc.
Characteristics:
Environmentally friendly and renewable, it is a good alternative to wood resources.
The characteristics of different fibers vary greatly, and the production process parameters need to be adjusted.
bamboo
cornstalk
reed
II. Binder
Its role is to firmly bond the loose fibers together, creating the strength of the board.
1. Urea-Formaldehyde (UF) Resin:
Characteristics: The lowest cost and most widely used adhesive. Fast curing speed and good bonding performance.
2. Isocyanate (MDI) Resin:
Characteristics:
No Added Formaldehyde: Contains no formaldehyde, offering excellent environmental performance. It is the preferred choice for high-end, eco-friendly MDF boards.
High Bonding Strength: Excellent adhesion to both wood and fillers, particularly suitable for sound-insulating boards containing large amounts of mineral fillers, preventing dusting.
Good Water Resistance: Significantly improves the board's moisture resistance.
III. Sound-Insulating Additives - 【Core Functional Materials】
These are the key to imparting excellent sound insulation performance to MDF boards. The core principle is to increase the surface density (mass per unit area) of the board, following the "mass law" – greater mass leads to better sound insulation.
1. Mineral Fillers:
Types: Barium sulfate (barite powder), quartz sand, limestone powder (calcium carbonate), kaolin, etc.
Characteristics:
High Density: This is the most important characteristic. For example, the density of barium sulfate (4.5 g/cm³) is much higher than that of wood fiber (~1.5 g/cm³), allowing a small amount to significantly increase the board's weight.
Inert: Chemically stable, does not affect adhesive curing.
Filling: Effectively fills the voids between fibers, creating a denser board structure and reducing paths for sound wave transmission.
Cost-Performance Balance: Barium sulfate is most effective but costly; quartz sand and limestone powder are lower-cost, common compromises.
2. Damping Materials:
Types: Rubber powder, asphalt-based materials, polymers, etc.
Characteristics:
Vibration Absorption: Effectively converts sound energy into heat, dissipating the energy of mid-to-low frequency sound waves, reducing board vibration caused by sound waves and secondary radiation noise.
Composite Effect: Often used in combination with mineral fillers to simultaneously improve both sound insulation (blocking) and absorption (dissipation) performance.
IV. Other Additives
1. Water Repellent: Usually paraffin emulsion, used to improve the board's water and moisture resistance.
2. Hardener: Used to accelerate the curing of UF resin, improving production efficiency.
3. Flame Retardants: Such as aluminum hydroxide, magnesium hydroxide, used to produce MDF boards with both sound-insulating and flame-retardant functions.
Summary:
The core of the raw material formulation for producing high-quality sound-insulating MDF lies in:
Wood fiber as the base structure.
MDI resin as the guarantee for environmental friendliness and high-performance bonding.
High-density mineral fillers (e.g., barium sulfate) as the key to achieving high sound transmission loss (STL).
Who We Are
Shandong MINGHUNG OSB&MDF Machinery Equipment Manufacturing Co.,Ltd. was founded in 1983, specializes in continuous press solutions for over 40 years.
MINGHUNG is a leading company in the industry of OSB&MDF making machine. With a strongfocus on producing high-quality machinery, we specialize in manufacturing thecomplete production line of Medium density fiberboard (MDF), High densityfiberboard (HDF),Particle board (PB), Oriented strand board (OSB) , Veneerable super strong particle board (LSB),Laminated board and veneer.
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
