Product Overview
The 7 Ply Corrugated Cardboard Production Line is designed for the continuous production of 7-ply corrugated board, which provides higher compression strength and load-bearing capacity than 3-ply and 5-ply corrugated board.
A standard 7-ply corrugated board consists of four liner papers and three corrugated mediums, forming a heavy-duty corrugated structure suitable for demanding packaging applications.
The production line integrates paper feeding, preheating, corrugating, gluing, laminating, heating, slitting, cross cutting, and stacking into one continuous manufacturing process.
Available in different working widths, production speeds, and flute combinations, the line can be configured according to production requirements for heavy-duty corrugated board.
7-ply corrugated board is commonly used for industrial packaging, export packaging, heavy equipment transportation, and other applications requiring high stacking strength and improved product protection.
Key Features
Designed for heavy-duty corrugated board production
The production line is designed to manufacture 7-ply corrugated board for packaging applications that require higher compression strength and better load-bearing performance.
Multiple working width options
Standard working widths range from 1800 mm to 2800 mm, with configurations up to 3300 mm available according to production requirements.
Flexible production speed
Different production configurations are available with design speeds suitable for medium- and high-capacity manufacturing.
Supports multiple flute combinations
The production line can be configured with different flute combinations such as:
- AAA
- AAC
- ABC
- BBC
Other flute combinations may be available according to customer requirements.
Continuous production process
The complete production line integrates corrugating, laminating, slitting, cutting, and stacking into one continuous manufacturing process.
Stable board quality
The production process is designed to maintain consistent bonding, board flatness, and dimensional accuracy for downstream converting operations.
Suitable for heavy packaging applications
The finished corrugated board can be used for packaging products requiring higher stacking strength, transportation protection, and structural performance.
Main Configuration
A typical 7 Ply Corrugated Board Production Line may include the following main equipment and auxiliary systems:
| Equipment / System | Function |
|---|---|
| Hydraulic Shaftless Mill Roll Stand | Supports paper rolls and provides stable paper feeding |
| Automatic Splicer | Automatically changes paper rolls without stopping production |
| Preheaters | Preheat liner paper and medium paper to improve bonding performance |
| Single Facers (3 Sets) | Produce single-face corrugated board for multi-layer board production |
| Cassette Type Single Facer (Optional) | Enables quick flute changeover and improves production flexibility |
| Overhead Bridge Conveyor | Transfers and stores single-face corrugated board between production sections |
| Triple Glue Machine | Applies adhesive for bonding multiple layers |
| Double Facer | Bonds multiple corrugated layers into finished 7 ply corrugated board |
| NC Thin Blade Slitter Scorer | Slits and scores corrugated board according to required specifications |
| NC Cross Cutter | Cuts corrugated board into required sheet lengths |
| Automatic Stacker | Collects and stacks finished corrugated sheets automatically |
| Steam System | Provides stable steam supply for heating, preheating, and corrugating processes |
| Electrical Control Cabinet System | Controls the operation of the complete production line and manages machine synchronization |
| Pneumatic System | Supplies compressed air for pneumatic components and automatic functions |
| Production Management System | Monitors production data, improves line efficiency, and supports production management |
The final configuration can be customized according to working width, production speed, flute combinations, automation level, factory layout, and specific production requirements.
Technical Parameters
| Item | Specification |
|---|---|
| Product Type | 7 Ply Corrugated Board |
| Working Width | 1800 mm, 2000 mm, 2200 mm, 2500 mm, 2800 mm (up to 3300 mm available) |
| Design Speed | 100-300 m/min |
| Flute Combination | AAA, AAC, ABC, BBC and other combinations |
| Liner Paper | Approx. 200–300 g/m² |
| Corrugating Medium | Approx. 150–200 g/m² |
| Steam Pressure | 0.8–1.3 MPa |
| Installed Power | Depends on production line configuration |
| Workshop Length | Depends on machine configuration and production speed |
Supported Flute Combinations
The production line supports various flute combinations depending on packaging requirements.
AAA Flute
Provides increased cushioning performance and is suitable for products requiring enhanced protection.
AAC Flute
Combines cushioning performance with improved compression strength for heavy-duty packaging.
ABC Flute
Offers a balance of cushioning, stacking strength, and structural performance.
BBC Flute
Provides excellent compression resistance and is commonly used for industrial transportation packaging.
The available flute combinations depend on the selected corrugating rolls and production configuration.
Suitable Materials
The production line can process commonly used papers for heavy-duty corrugated board production, including:
- Kraft liner paper
- Test liner paper
- White top liner paper
- Corrugating medium paper
- Recycled paper (depending on production requirements)
Paper grades should be selected according to the required board strength and final packaging application.
Applications
The 7 Ply Corrugated Board Production Line is suitable for manufacturers producing heavy-duty corrugated board for industrial and export packaging.
Typical applications include:
Industrial equipment packaging
Suitable for machinery, generators, pumps, compressors, and other industrial equipment.
Heavy machinery transportation
Used for packaging large mechanical components and heavy industrial products.
Automotive and engineering products
Suitable for automotive parts, metal products, and engineering equipment requiring high-strength packaging.
Export packaging
Provides improved protection for products transported over long distances by sea, rail, or road.
Agricultural and bulk product packaging
Suitable for selected agricultural products and bulk goods requiring higher stacking performance.
Alternative packaging solution
In certain applications, 7-ply corrugated board may be used as an alternative to wooden packaging, depending on product weight, transportation conditions, and packaging design.
Working Process
The production process typically includes the following steps:
1. Paper roll feeding
Paper rolls are loaded onto the hydraulic shaftless mill roll stands.
2. Paper preheating
Liner paper and corrugating medium are preheated to improve forming and bonding performance.
3. Corrugating
Three single facers produce the required corrugated layers according to the selected flute combination.
4. Laminating
The glue machine applies adhesive, and the double facer bonds multiple layers into finished 7-ply corrugated board.
5. Slitting and scoring
The NC thin blade slitter scorer cuts the board to the required width and creates score lines.
6. Cross cutting
The NC cross cutter cuts the board into preset sheet lengths.
7. Automatic stacking
Finished sheets are automatically counted and stacked for the next converting process.
Why Choose This Production Line
The 7 Ply Corrugated Board Production Line is suitable for manufacturers producing heavy-duty corrugated board with higher strength than standard 3-ply and 5-ply products.
Key advantages include:
- Continuous corrugated board production
- Suitable for heavy-duty packaging
- Multiple working widths available
- Flexible flute combinations
- Stable board quality
- Compatible with downstream printing and carton converting equipment
- Suitable for industrial and export packaging production
Machine configuration can be customized according to production capacity, workshop layout, and packaging requirements.
Recommended Industries
This production line is widely used by:
- Corrugated board manufacturers
- Large carton box factories
- Industrial packaging manufacturers
- Export packaging suppliers
- Heavy equipment packaging companies
- Automotive packaging manufacturers
- Machinery packaging suppliers
- Logistics packaging companies
Frequently Asked Questions
What is a 7 Ply Corrugated Board Production Line?
A 7 Ply Corrugated Board Production Line is designed to manufacture heavy-duty corrugated board consisting of four liner papers and three corrugated mediums for industrial packaging applications.
What is the difference between 5-ply and 7-ply corrugated board?
Compared with 5-ply corrugated board, 7-ply board generally provides higher compression strength, greater stacking performance, and increased protection for heavier products.
Which flute combinations are available?
Common flute combinations include AAA, AAC, ABC, and BBC. Other combinations may be available depending on production requirements.
What working widths are available?
Standard working widths range from 1800 mm to 2800 mm, with wider configurations up to 3300 mm available.
What industries commonly use 7-ply corrugated board?
7-ply corrugated board is commonly used in industrial packaging, heavy machinery transportation, automotive parts packaging, export packaging, and other heavy-duty applications.
Can the production line be customized?
Yes. Every production line is engineered according to the customer’s production requirements. Factors such as working width, design speed, flute configuration, automation level, heating system, and optional equipment can all be configured to create a production solution that matches your factory layout, production capacity, and product range.
How Thick Is a 7 Ply Corrugated Box in MM?
A standard 7 ply corrugated board is typically 7.5 mm to 14 mm thick after production, depending on the flute combination, paper grades, and manufacturing process.
Typical finished board thicknesses include:
- BCE: approximately 7.5–8.2 mm
- BCB: approximately 8.0–9.0 mm
- BCA / ABC: approximately 10.5–12.5 mm
- ACA: approximately 12.5–14.0 mm
A 7 Ply Corrugated Board Production Line can produce different flute combinations to meet various requirements for heavy-duty packaging, export cartons, industrial equipment, and high-strength shipping boxes. Actual board thickness may vary slightly depending on paper specifications and production settings.
