MINGHUNG
Manufacturing Process
The manufacturing process primarily involves the following steps:
1. Log Processing: Logs (e.g., poplar, pine) are cut into required lengths and softened by steaming.
2. Peeling & Drying: The softened logs are rotated against a blade in a lathe to produce a continuous veneer sheet. The veneer is clipped to size and dried in a dryer to achieve suitable moisture content (typically 8-12%).
3. Gluing & Lay-up: Dried veneers are coated evenly with adhesive (e.g., Phenolic Resin PF) by a glue spreader (e.g., roller type). The glued and unglued veneers are then assembled into a mat with the grain of adjacent layers perpendicular to each other.
4. Pre-pressing & Hot Pressing: The assembled mat is first cold-pressed or pre-pressed for initial shaping and air removal. It is then loaded into a multi-opening hot press where high temperature (140-180°C) and high pressure (10-20 MPa) cure the adhesive, permanently bonding the veneers into a solid panel.
5. Post-processing: The pressed panels are cooled, trimmed to size, sanded (if required), graded, and packaged. For construction formwork, the surface is usually laminated (with phenolic film) to enhance waterproofing and abrasion resistance.
Materials & Thickness for Concrete Formwork Plywood
Materials:
Core Material: Poplar is predominantly used. It is ideal for formwork core due to its abundance, cost-effectiveness, uniform texture, excellent machinability, and bonding properties. Sometimes other species like pine or eucalyptus are mixed in.
Adhesive: Waterproof Phenol-Formaldehyde resin (PF) is mandatory. PF glue provides the essential water resistance needed for the panel to withstand repeated use and wet conditions. The surface is typically laminated with a dark brown or black phenolic film to further enhance wear resistance, waterproofing, and concrete release properties.
Common Thicknesses:
Plywood for concrete formwork comes in various thicknesses to meet different load-bearing requirements in construction. Common thicknesses (in mm) are:12, 15, 18, 21, 25, 30. Among these, 18mm is currently the most common and widely used specification in the global market.
 | 25mm Thickness Plywood |
The 25mm thick construction formwork plywood is a heavy-duty, high-strength panel designed specifically for exceptionally demanding construction applications.
Applications:
Large-scale Infrastructure Projects: Such as piers, columns, and girders of large bridges; thick walls for dams and large power stations.
Core Tubes & Shear Walls in High-Rise Buildings: In skyscrapers, core tubes and shear walls are subjected to extreme concrete pressure. 25mm plywood provides the necessary rigidity and strength.
Projects Requiring Very High Reuse: Due to its extreme thickness and durability, it can be reused many more times than 18mm panels on well-managed projects. Although the initial cost per sheet is higher, the long-term amortized cost can be lower.
Mass Concrete Pouring: For occasions involving huge single pours and extreme lateral concrete pressure, 25mm or thicker formwork is essential to prevent bulging and blowouts.
Key Advantages:
1. Exceptional Load-Bearing Capacity & Bending Strength: Can withstand enormous lateral pressure from fresh concrete, ensuring construction safety.
2. Superior Stiffness & Resistance to Deformation: Minimal deflection under high pressure guarantees the flatness and verticality of the poured structure, improving project quality.
3. Long Service Life & High Reusability: Extremely abrasion-resistant and durable. With proper use and maintenance, it can be reused dozens of times or more, offering high comprehensive economic value.
4. Enhanced Construction Safety: Significantly reduces the risk of formwork failure (bulging or bursting) due to insufficient strength, protecting personnel and project safety.
| Equipment Configuration |
I. Core Essential Equipment
5. Automatic Lay-up Line
Requirements: Crucial for 25mm panels (often 11+ plies). Manual lay-up is inefficient and prone to error. Automatic systems ensure precise placement and grain orientation, guaranteeing symmetrical mat structure and minimizing warpage.
Function: Automatically stacks glued core veneers and unglued face/back veneers into a cross-grained mat.
8. Finishing Equipment
Cooler & Turner: Cools hot panels from the press rapidly, setting their shape and preventing warping.
Heavy-Duty Trimming Saw: Trims the rough edges of the hard, thick panels; requires high-power motors.
Calibrating Sander: Typically a multi-head (e.g., 4-6 heads) wide-belt sander for calibrating and finishing thick panels, ensuring precise thickness and a smooth surface for subsequent laminating.
Film Laminating Machine: Essential for formwork. Laminates phenolic resin-impregnated paper onto the sanded panel surface under heat and pressure, creating a waterproof, wear-resistant film.
cross-cut saw
Sander
II. Auxiliary Systems
1. Raw Material Handling System: Log cross-cut saw, debarker, steaming vat.
2. Conveying System: Belt and roller conveyors linking all machines for continuous flow.
3. Dust Collection System: Powerful central system to handle dust from peeling, trimming, and sanding.
4. Thermal Energy Center: Provides stable heat (thermal oil/steam) for the dryer and hot press.
5. Glue Preparation System: Storage, mixing, and pumping equipment for phenolic glue.
6. Central Control System: PLC-based automation, the "brain" of the line, integrating and controlling all machine parameters.
| Configuration Summary & Features |
A line producing 25mm construction formwork is a heavy-duty, high-investment, highly automated production line. Its main differences from standard lines are:
Reinforced Structure: Key machines are structurally reinforced to handle heavy, thick material.
Higher Pressure: Tonnage of the pre-press and hot press is the core specification and must be met.
Higher Precision: Control systems must be more precise to manage the complex process of thick panel production.
Higher Automation: Automatic lay-up is critical for ensuring consistency in thick panel quality.
In a nutshell: This line is designed around ensuring that immense pressure and heat effectively act on every layer of the mat to produce structurally stable, strongly bonded, high-strength thick panels.
| Key Features & Advantages of production line |
Specialized for Thick Board Production: Optimized for producing 18mm, 21mm, 25mm, and other thick construction formwork, offering far superior productivity and stability than standard lines.
Superior Formwork Quality: Produces panels with a smooth surface, precise thickness, high MOR (Modulus of Rupture), and excellent waterproofness (using Phenolic PF glue), fully meeting demanding construction requirements.
High Degree of Automation: The automated process, from peeling, drying, gluing, lay-up, pre-pressing, hot pressing to trimming and sanding, significantly reduces manual labor and enhances production efficiency and consistency.
Robust & Durable Design: Key structural components are reinforced, and the hot press is built with sufficient tonnage, specifically designed for the continuous high-pressure, high-temperature environment of thick plate production, ensuring long-term stable operation.
Comprehensive Turnkey Service: We provide a complete package, including factory planning, equipment installation & commissioning, technical process guidance, and personnel training to get you up and running quickly.
Whether you are establishing a new factory or upgrading existing equipment, this production line is your ideal investment to capture the market for thick construction formwork.
Contact Us Now for a Customized Solution and Quotation!
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
Manufacturing Process
The manufacturing process primarily involves the following steps:
1. Log Processing: Logs (e.g., poplar, pine) are cut into required lengths and softened by steaming.
2. Peeling & Drying: The softened logs are rotated against a blade in a lathe to produce a continuous veneer sheet. The veneer is clipped to size and dried in a dryer to achieve suitable moisture content (typically 8-12%).
3. Gluing & Lay-up: Dried veneers are coated evenly with adhesive (e.g., Phenolic Resin PF) by a glue spreader (e.g., roller type). The glued and unglued veneers are then assembled into a mat with the grain of adjacent layers perpendicular to each other.
4. Pre-pressing & Hot Pressing: The assembled mat is first cold-pressed or pre-pressed for initial shaping and air removal. It is then loaded into a multi-opening hot press where high temperature (140-180°C) and high pressure (10-20 MPa) cure the adhesive, permanently bonding the veneers into a solid panel.
5. Post-processing: The pressed panels are cooled, trimmed to size, sanded (if required), graded, and packaged. For construction formwork, the surface is usually laminated (with phenolic film) to enhance waterproofing and abrasion resistance.
Materials & Thickness for Concrete Formwork Plywood
Materials:
Core Material: Poplar is predominantly used. It is ideal for formwork core due to its abundance, cost-effectiveness, uniform texture, excellent machinability, and bonding properties. Sometimes other species like pine or eucalyptus are mixed in.
Adhesive: Waterproof Phenol-Formaldehyde resin (PF) is mandatory. PF glue provides the essential water resistance needed for the panel to withstand repeated use and wet conditions. The surface is typically laminated with a dark brown or black phenolic film to further enhance wear resistance, waterproofing, and concrete release properties.
Common Thicknesses:
Plywood for concrete formwork comes in various thicknesses to meet different load-bearing requirements in construction. Common thicknesses (in mm) are:12, 15, 18, 21, 25, 30. Among these, 18mm is currently the most common and widely used specification in the global market.
| 25mm Thickness Plywood |
The 25mm thick construction formwork plywood is a heavy-duty, high-strength panel designed specifically for exceptionally demanding construction applications.
Applications:
Large-scale Infrastructure Projects: Such as piers, columns, and girders of large bridges; thick walls for dams and large power stations.
Core Tubes & Shear Walls in High-Rise Buildings: In skyscrapers, core tubes and shear walls are subjected to extreme concrete pressure. 25mm plywood provides the necessary rigidity and strength.
Projects Requiring Very High Reuse: Due to its extreme thickness and durability, it can be reused many more times than 18mm panels on well-managed projects. Although the initial cost per sheet is higher, the long-term amortized cost can be lower.
Mass Concrete Pouring: For occasions involving huge single pours and extreme lateral concrete pressure, 25mm or thicker formwork is essential to prevent bulging and blowouts.
Key Advantages:
1. Exceptional Load-Bearing Capacity & Bending Strength: Can withstand enormous lateral pressure from fresh concrete, ensuring construction safety.
2. Superior Stiffness & Resistance to Deformation: Minimal deflection under high pressure guarantees the flatness and verticality of the poured structure, improving project quality.
3. Long Service Life & High Reusability: Extremely abrasion-resistant and durable. With proper use and maintenance, it can be reused dozens of times or more, offering high comprehensive economic value.
4. Enhanced Construction Safety: Significantly reduces the risk of formwork failure (bulging or bursting) due to insufficient strength, protecting personnel and project safety.
| Equipment Configuration |
I. Core Essential Equipment
5. Automatic Lay-up Line
Requirements: Crucial for 25mm panels (often 11+ plies). Manual lay-up is inefficient and prone to error. Automatic systems ensure precise placement and grain orientation, guaranteeing symmetrical mat structure and minimizing warpage.
Function: Automatically stacks glued core veneers and unglued face/back veneers into a cross-grained mat.
8. Finishing Equipment
Cooler & Turner: Cools hot panels from the press rapidly, setting their shape and preventing warping.
Heavy-Duty Trimming Saw: Trims the rough edges of the hard, thick panels; requires high-power motors.
Calibrating Sander: Typically a multi-head (e.g., 4-6 heads) wide-belt sander for calibrating and finishing thick panels, ensuring precise thickness and a smooth surface for subsequent laminating.
Film Laminating Machine: Essential for formwork. Laminates phenolic resin-impregnated paper onto the sanded panel surface under heat and pressure, creating a waterproof, wear-resistant film.
cross-cut saw
Sander
II. Auxiliary Systems
1. Raw Material Handling System: Log cross-cut saw, debarker, steaming vat.
2. Conveying System: Belt and roller conveyors linking all machines for continuous flow.
3. Dust Collection System: Powerful central system to handle dust from peeling, trimming, and sanding.
4. Thermal Energy Center: Provides stable heat (thermal oil/steam) for the dryer and hot press.
5. Glue Preparation System: Storage, mixing, and pumping equipment for phenolic glue.
6. Central Control System: PLC-based automation, the "brain" of the line, integrating and controlling all machine parameters.
| Configuration Summary & Features |
A line producing 25mm construction formwork is a heavy-duty, high-investment, highly automated production line. Its main differences from standard lines are:
Reinforced Structure: Key machines are structurally reinforced to handle heavy, thick material.
Higher Pressure: Tonnage of the pre-press and hot press is the core specification and must be met.
Higher Precision: Control systems must be more precise to manage the complex process of thick panel production.
Higher Automation: Automatic lay-up is critical for ensuring consistency in thick panel quality.
In a nutshell: This line is designed around ensuring that immense pressure and heat effectively act on every layer of the mat to produce structurally stable, strongly bonded, high-strength thick panels.
| Key Features & Advantages of production line |
Specialized for Thick Board Production: Optimized for producing 18mm, 21mm, 25mm, and other thick construction formwork, offering far superior productivity and stability than standard lines.
Superior Formwork Quality: Produces panels with a smooth surface, precise thickness, high MOR (Modulus of Rupture), and excellent waterproofness (using Phenolic PF glue), fully meeting demanding construction requirements.
High Degree of Automation: The automated process, from peeling, drying, gluing, lay-up, pre-pressing, hot pressing to trimming and sanding, significantly reduces manual labor and enhances production efficiency and consistency.
Robust & Durable Design: Key structural components are reinforced, and the hot press is built with sufficient tonnage, specifically designed for the continuous high-pressure, high-temperature environment of thick plate production, ensuring long-term stable operation.
Comprehensive Turnkey Service: We provide a complete package, including factory planning, equipment installation & commissioning, technical process guidance, and personnel training to get you up and running quickly.
Whether you are establishing a new factory or upgrading existing equipment, this production line is your ideal investment to capture the market for thick construction formwork.
Contact Us Now for a Customized Solution and Quotation!
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
