News - Corrugated Paper Making and Tungsten Carbide Blades Solution

Corrugated Paper Making Process:

The process of making corrugated paper involves several steps, which are outlined below:

1. Paper Making:

Pulp Preparation: Wood chips or recycled paper are pulped, either mechanically or chemically, to create a slurry.
Paper Formation: The pulp is spread onto a moving wire mesh screen to form a wet web, which is then pressed and dried to form paper.

2. Corrugating:

Single Facers: A flat sheet (liner) is glued to a medium that’s been formed into a corrugated shape using heat and pressure. This creates a single-faced board.
Double Facers: Another liner is glued to the opposite side of the corrugated medium, forming a double-faced corrugated board.

3. Cutting and Slitting:

Slitting: The board is cut into specific widths using large rotary blades.
Scoring and Cutting: Lines are scored for easy folding, and the board is cut into sheets or specific shapes.

4. Printing and Converting:

The corrugated sheets are then printed, cut, scored, and formed into boxes or other packaging shapes.

5. Quality Control and Finishing:

Ensuring the corrugated product meets quality standards, with checks on strength, dimensions, and print quality.

Issues Faced During Slitting:

Blade Wear: The blades used for slitting are subjected to significant wear due to the abrasive nature of corrugated board, leading to reduced cutting efficiency and poor cut quality over time.
Dust and Debris: Cutting through paper generates a lot of dust, which can dull blades, affect machinery, and contaminate the product.
Blade Misalignment: If blades are not perfectly aligned, they can cause uneven cuts, leading to waste or poor product quality.
Blade Heat: Friction from cutting can heat up blades, causing thermal expansion and potential warping or melting of the blade material.
Material Consistency: Variations in paper thickness or quality can challenge the slitting process, leading to inconsistent cuts.

Tungsten Carbide Blades as a Solution:

Durability: Tungsten carbide is extremely hard and resistant to wear, significantly extending the life of the blades compared to steel blades. This reduces downtime for blade changes and maintenance.
Edge Retention: These blades maintain a sharp edge for longer, ensuring consistent cut quality even after prolonged use, which is crucial for maintaining precise slitting accuracy.
Heat Resistance: Tungsten carbide has a high melting point, making it less susceptible to the heat generated during cutting, thus preventing deformation or dulling due to thermal effects.
Reduced Dust: A sharper blade cuts cleaner, producing less dust and debris, which improves the overall cleanliness of the operation and reduces maintenance.
Cost-Effectiveness: Although initially more expensive, the longevity of tungsten carbide blades can lead to cost savings over time due to reduced replacement frequency and higher productivity from fewer interruptions.
Precision: The material’s hardness allows for very precise manufacturing of the blade’s edge, which is essential for accurate slitting, especially when dealing with different grades or thicknesses of corrugated board.

While using high-quality tungsten carbide blades for slitting in the corrugated paper manufacturing process addresses many of the typical issues encountered, improving efficiency, product quality, and operational cost-effectiveness. However, ensuring proper blade maintenance, alignment, and periodic sharpening or replacement is also crucial for optimal performance.

Huaxin Cemented Carbide manufactures tungsten carbide blades custom, altered standard and standard blanks and preforms, starting from powder through finished ground blanks. Our comprehensive selection of grades and our manufacturing process consistently delivers high-performance, reliable near-net shaped tools that address specialized customer application challenges across diverse industries.

Tailored Solutions for Every Industry
custom-engineered blades
Leading manufacturer of industrial blades

Post time: Feb-06-2025