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Using low-value wood resources such as small-diameter wood and branch wood to produce Oriented Strand Board (OSB) is a model for the wood industry to utilize resources efficiently, reduce costs, and achieve sustainable development.
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Core Concept and Raw Material Characteristics
Core Concept: Processing traditionally low-value materials—such as small-diameter wood (diameter < 20cm), thinning wood, forest harvest residues (branches, tops), and even some wood processing scraps—into high-strength, high-value-added engineered panels (OSB) through specific processes and equipment.
Advantages: Low cost, wide availability, sustainable, beneficial for forest management and comprehensive resource utilization.
|
Main Production Process
This is the first critical stage of this type of production line, directly affecting subsequent flake quality and equipment longevity.
Feeding and Bucking: Raw materials are fed via chain conveyors or grapples and cut to suitable length (typically 2-4 meters) by drum or ring buckers, or directly chipped into specified wood chips by disc chippers.
Debarking: Efficient debarking is essential due to the high bark content. Drum debarkers are commonly used, removing bark through friction between logs and against the drum walls. The bark is typically sent to the energy plant as fuel.
Washing and Sorting: Sand, stones, metal, and other contaminants are removed via water washing or dry cleaning (vibrating screens + magnetic separators). Cleaned logs proceed to the next stage.
2. Flaking and Drying Section
This is the core technical stage, determining strand geometry and quality.
Flaking: Cleaned logs are fed into Ring-type Stranders (or Flakers). This is one of the core machines in an OSB line. It slices logs along the grain to produce ideal large, flat flakes (called "strands" or "flakes"). Strand length, thickness, and geometry can be precisely controlled by adjusting knives, gaps, etc.
Screening and Re-fining: Strands are classified by size via multi-deck screens. Qualified fine face strands and coarse core strands are conveyed separately. Oversized strands are sent back to a re-finer or hammermill for reduction.
Drying: Sized wet strands are dried in rotary drum dryers (typically using hot gas from natural gas or biomass burners). Moisture content is reduced to 2-4% to meet requirements for blending and pressing. Drying requires precise control to prevent fire or over-drying.
3. Blending, Forming, and Pressing Section
This is the forming stage that gives OSB its oriented structure and strength.
Blending (Resin Application): Dried strands are mixed with adhesive in high-speed blenders. OSB primarily uses Phenolic Resin or PMDI (Isocyanate) glue, the latter offering superior waterproofness but at a higher cost. Precise metering systems ensure glue evenly coats each strand.
Oriented Forming: This is the key process distinguishing OSB from ordinary particleboard. Resinated strands pass through mechanical or electrostatic orienting forming heads. Face strands are oriented parallel to the panel length, while core strands are oriented perpendicularly or randomly, creating the classic "cross-oriented three-layer structure." This structure gives OSB exceptionally high longitudinal strength and good transverse strength.
Pre-pressing and Hot Pressing: The loose, formed mat is first lightly compacted by a continuous belt pre-press, then cut to length and fed into a multi-opening hot press. Under high temperature (200-220°C) and pressure, the adhesive cures rapidly, bonding the strands firmly into a dense panel.
4. Finishing and Ancillary Sections
Cooling and Stacking: Pressed panels enter a cooling star or cooler to set, then are stacked for storage.
Sanding: Panels are sanded to precise thickness and smoothness as required.
Trimming and Packaging: Panels are trimmed to market sizes via cross-cut and trim saws, then packaged for shipment.
Energy Center (Thermal Oil Plant/Power Plant): The "power heart" of the entire line. Uses process residues (bark, sander dust, fines) as fuel to generate thermal energy for pressing and drying, achieving energy self-sufficiency and cleaner production.
| Key Equipment
1. Ring-type Strander: Must efficiently handle small-diameter, curved raw material and produce high-quality strands with a high yield.
2. High-Efficiency Drying System: Requires large-capacity, energy-efficient, and safe drying systems for high volumes of high-moisture strands.
3. Precision Blending System: Uniform resin distribution with low resin consumption (typically 2-5% of dry strand weight) is key for cost control and quality.
4. Oriented Forming Technology: Advanced forming heads are essential for achieving OSB's superior mechanical properties, determining product grade and value.
5. Large-Scale Continuous Pressing Technology: Modern large-scale OSB lines often use continuous flat presses for higher productivity and more uniform panel density.
OSB flaker
drying system
glue sizing system
mat forming machine
continuous hot press
sanding machine
|
Advantages of this production line
1. Raw Material Cost and Availability Advantages
Low-Cost Raw Materials: The core advantage lies in utilizing traditionally low-value wood such as small-diameter logs, thinning wood, and harvest residues, significantly reducing raw material procurement costs.
Abundant and Sustainable Resources: Raw materials are sourced from forest management and logging residues, ensuring stable and renewable supply, which aligns with the circular economy concept.
Reduced Resource Waste: Maximizes the use of forest resources by transforming "waste wood" into high-value products, enhancing the overall economic efficiency of forestry.
2. Product Performance and Market Advantages
High Value-Added Product: Processes low-value feedstock into high-strength, versatile engineered wood panels (OSB) for structural applications, commanding strong product premiums.
Excellent Product Performance: The OSB produced exhibits exceptional bending strength, dimensional stability, and nail-holding capacity, making it suitable for structural building applications and enabling it to substitute plywood in many uses.
Large and Stable Market Demand: OSB is a fundamental material in construction, packaging, and interior finishing, with high market acceptance and consistently growing demand.
3. Environmental and Sustainability Advantages
Eco-Friendly Operation: The production line is typically integrated with an energy plant that uses process residues (bark, fines) to generate thermal energy for drying and pressing, achieving energy self-sufficiency and reducing fossil fuel consumption.
Alignment with Policy Goals: The project strongly supports policies promoting efficient forest resource utilization, carbon neutrality, and sustainable development, facilitating access to policy support and recognition.
Reduced Environmental Pressure: By utilizing logging residues, it mitigates the greenhouse gas emissions and fire risks associated with their natural decay or open burning in forests.
4. Operational and Strategic Advantages
Promotes Regional Economic Development: Facilitates the establishment of factories near raw material sources, stimulating local forestry, logistics, and employment, and fostering industrial clusters.
Supply Chain Resilience: Diversified and localized raw material sources help reduce dependence on imported timber or single-material supplies, enhancing supply chain security.
Technical Advancement and Efficiency: Modern production lines feature high automation, continuous operation, high efficiency, and stable, controllable product quality.
|
Company Profile
We are China professional factory and supplier of OSB board making machine, MDF/HDF making machine and Flakeboard/Particleboard making machine. Whatever which size, thickness, capacity you want to make, and whatever what kinds of raw materials do you use, our professional team can offer a suitable and good solution for you.
From A to Z, from Raw materials to the final wood based panel, we can offer you all necessary machinery. including: Wood chipper, Strander, Disc chipper, Ring flaker, Rotary drum dryer, Vibrating screener, Glue dosing and applying system, Refiner, Mat frorming line, Continuous pre-press, synchronous Cross-cut saw, Multi-layers Hot press /Continuous single layer hot press, Auto edge trimming machine line，Sanding line，etc.
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
Using low-value wood resources such as small-diameter wood and branch wood to produce Oriented Strand Board (OSB) is a model for the wood industry to utilize resources efficiently, reduce costs, and achieve sustainable development.
|
Core Concept and Raw Material Characteristics
Core Concept: Processing traditionally low-value materials—such as small-diameter wood (diameter < 20cm), thinning wood, forest harvest residues (branches, tops), and even some wood processing scraps—into high-strength, high-value-added engineered panels (OSB) through specific processes and equipment.
Advantages: Low cost, wide availability, sustainable, beneficial for forest management and comprehensive resource utilization.
|
Main Production Process
This is the first critical stage of this type of production line, directly affecting subsequent flake quality and equipment longevity.
Feeding and Bucking: Raw materials are fed via chain conveyors or grapples and cut to suitable length (typically 2-4 meters) by drum or ring buckers, or directly chipped into specified wood chips by disc chippers.
Debarking: Efficient debarking is essential due to the high bark content. Drum debarkers are commonly used, removing bark through friction between logs and against the drum walls. The bark is typically sent to the energy plant as fuel.
Washing and Sorting: Sand, stones, metal, and other contaminants are removed via water washing or dry cleaning (vibrating screens + magnetic separators). Cleaned logs proceed to the next stage.
2. Flaking and Drying Section
This is the core technical stage, determining strand geometry and quality.
Flaking: Cleaned logs are fed into Ring-type Stranders (or Flakers). This is one of the core machines in an OSB line. It slices logs along the grain to produce ideal large, flat flakes (called "strands" or "flakes"). Strand length, thickness, and geometry can be precisely controlled by adjusting knives, gaps, etc.
Screening and Re-fining: Strands are classified by size via multi-deck screens. Qualified fine face strands and coarse core strands are conveyed separately. Oversized strands are sent back to a re-finer or hammermill for reduction.
Drying: Sized wet strands are dried in rotary drum dryers (typically using hot gas from natural gas or biomass burners). Moisture content is reduced to 2-4% to meet requirements for blending and pressing. Drying requires precise control to prevent fire or over-drying.
3. Blending, Forming, and Pressing Section
This is the forming stage that gives OSB its oriented structure and strength.
Blending (Resin Application): Dried strands are mixed with adhesive in high-speed blenders. OSB primarily uses Phenolic Resin or PMDI (Isocyanate) glue, the latter offering superior waterproofness but at a higher cost. Precise metering systems ensure glue evenly coats each strand.
Oriented Forming: This is the key process distinguishing OSB from ordinary particleboard. Resinated strands pass through mechanical or electrostatic orienting forming heads. Face strands are oriented parallel to the panel length, while core strands are oriented perpendicularly or randomly, creating the classic "cross-oriented three-layer structure." This structure gives OSB exceptionally high longitudinal strength and good transverse strength.
Pre-pressing and Hot Pressing: The loose, formed mat is first lightly compacted by a continuous belt pre-press, then cut to length and fed into a multi-opening hot press. Under high temperature (200-220°C) and pressure, the adhesive cures rapidly, bonding the strands firmly into a dense panel.
4. Finishing and Ancillary Sections
Cooling and Stacking: Pressed panels enter a cooling star or cooler to set, then are stacked for storage.
Sanding: Panels are sanded to precise thickness and smoothness as required.
Trimming and Packaging: Panels are trimmed to market sizes via cross-cut and trim saws, then packaged for shipment.
Energy Center (Thermal Oil Plant/Power Plant): The "power heart" of the entire line. Uses process residues (bark, sander dust, fines) as fuel to generate thermal energy for pressing and drying, achieving energy self-sufficiency and cleaner production.
| Key Equipment
1. Ring-type Strander: Must efficiently handle small-diameter, curved raw material and produce high-quality strands with a high yield.
2. High-Efficiency Drying System: Requires large-capacity, energy-efficient, and safe drying systems for high volumes of high-moisture strands.
3. Precision Blending System: Uniform resin distribution with low resin consumption (typically 2-5% of dry strand weight) is key for cost control and quality.
4. Oriented Forming Technology: Advanced forming heads are essential for achieving OSB's superior mechanical properties, determining product grade and value.
5. Large-Scale Continuous Pressing Technology: Modern large-scale OSB lines often use continuous flat presses for higher productivity and more uniform panel density.
OSB flaker
drying system
glue sizing system
mat forming machine
continuous hot press
sanding machine
|
Advantages of this production line
1. Raw Material Cost and Availability Advantages
Low-Cost Raw Materials: The core advantage lies in utilizing traditionally low-value wood such as small-diameter logs, thinning wood, and harvest residues, significantly reducing raw material procurement costs.
Abundant and Sustainable Resources: Raw materials are sourced from forest management and logging residues, ensuring stable and renewable supply, which aligns with the circular economy concept.
Reduced Resource Waste: Maximizes the use of forest resources by transforming "waste wood" into high-value products, enhancing the overall economic efficiency of forestry.
2. Product Performance and Market Advantages
High Value-Added Product: Processes low-value feedstock into high-strength, versatile engineered wood panels (OSB) for structural applications, commanding strong product premiums.
Excellent Product Performance: The OSB produced exhibits exceptional bending strength, dimensional stability, and nail-holding capacity, making it suitable for structural building applications and enabling it to substitute plywood in many uses.
Large and Stable Market Demand: OSB is a fundamental material in construction, packaging, and interior finishing, with high market acceptance and consistently growing demand.
3. Environmental and Sustainability Advantages
Eco-Friendly Operation: The production line is typically integrated with an energy plant that uses process residues (bark, fines) to generate thermal energy for drying and pressing, achieving energy self-sufficiency and reducing fossil fuel consumption.
Alignment with Policy Goals: The project strongly supports policies promoting efficient forest resource utilization, carbon neutrality, and sustainable development, facilitating access to policy support and recognition.
Reduced Environmental Pressure: By utilizing logging residues, it mitigates the greenhouse gas emissions and fire risks associated with their natural decay or open burning in forests.
4. Operational and Strategic Advantages
Promotes Regional Economic Development: Facilitates the establishment of factories near raw material sources, stimulating local forestry, logistics, and employment, and fostering industrial clusters.
Supply Chain Resilience: Diversified and localized raw material sources help reduce dependence on imported timber or single-material supplies, enhancing supply chain security.
Technical Advancement and Efficiency: Modern production lines feature high automation, continuous operation, high efficiency, and stable, controllable product quality.
|
Company Profile
We are China professional factory and supplier of OSB board making machine, MDF/HDF making machine and Flakeboard/Particleboard making machine. Whatever which size, thickness, capacity you want to make, and whatever what kinds of raw materials do you use, our professional team can offer a suitable and good solution for you.
From A to Z, from Raw materials to the final wood based panel, we can offer you all necessary machinery. including: Wood chipper, Strander, Disc chipper, Ring flaker, Rotary drum dryer, Vibrating screener, Glue dosing and applying system, Refiner, Mat frorming line, Continuous pre-press, synchronous Cross-cut saw, Multi-layers Hot press /Continuous single layer hot press, Auto edge trimming machine line，Sanding line，etc.
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
