What are the differences between extrusion and compression molding for WPC outdoor seating?

When it comes to manufacturing WPC (Wood-Plastic Composite) outdoor seating, two primary methods are extrusion and compression molding. Each technique has distinct advantages and limitations.

Extrusion Molding:

This process involves melting WPC material and forcing it through a die to create continuous profiles, which are then cut to size. Extrusion is ideal for high-volume production, offering consistent quality and intricate designs. However, it may lack the density and strength of compression-molded products.

Compression Molding:

Here, WPC material is placed in a mold and subjected to high pressure and heat. This results in denser, more durable seating with superior load-bearing capacity. While slower and more expensive, compression molding excels in producing heavy-duty outdoor furniture.

Key Differences:

- Production Speed: Extrusion is faster and more cost-effective for large batches.

- Durability: Compression molding yields stronger, longer-lasting products.

- Design Flexibility: Extrusion allows for more complex shapes, while compression is better for thick, robust structures.

Choosing between the two depends on your priorities—cost and volume (extrusion) or durability and strength (compression).