Production Workshop: Intelligent Manufacture of the Polyurethane Sandwich Panel Production Line

Polyurethane Edge-Sealed Rock Wool Sandwich Panel is a high-performance building composite material, widely used in the exterior walls and roofs of steel structure buildings, warehouses, factories, cold storage, and other places. Its production process mainly includes material selection, forming, bonding, edge sealing, cutting, inspection, and packaging. Each step requires strict control of process parameters to ensure product quality and performance. This article will take you deep into the production workshop, providing a panoramic view of the precise manufacturing process of this composite panel, from raw materials through the polyurethane sandwich panel production line to the final finished product.

Preparation of Raw Materials  

The main materials for Polyurethane Edge-Sealed Rock Wool Sandwich Panel include color-coated steel plate, rock wool core material, and polyurethane edge sealing material.

• Color Coated Steel Plate: Selected galvanized or aluminum-zinc color-coated steel plates, usually with a thickness of 0.4mm-0.8mm, which are beautiful, anti-corrosive, and aging-resistant.

  
  

• Rock Wool: The core material uses high-quality structural rock wool with a density of more than 100kg/m³, made from basalt. It has excellent fireproof, insulation, and sound-absorbing properties.  

  
  

• Polyurethane: Used for edge sealing of the panels, featuring low thermal conductivity, high bending strength, and excellent waterproof performance.

Forming of Color Coated Steel Plate

The color-coated steel plate is rolled into the required shapes through a forming machine, such as small corrugations, flat, or single-mirror surface. The formed steel plate will serve as the upper and lower surfaces of the sandwich panel, enhancing the stiffness and wind resistance of the panel through the wave design.

Rock Wool Core Material Laying

Rock wool blocks are laid in a staggered manner between the formed color-coated steel plates according to the designed thickness (50mm-200mm), ensuring that the fibers of the rock wool are perpendicular to the upper and lower surfaces of the sandwich panel to enhance insulation performance and structural stability.

High-Strength Foam Adhesive Bonding

The rock wool blocks are connected to the upper and lower color-coated steel plates using a high-strength foam adhesive, ensuring a tight bond between the rock wool and steel plate, forming an integrated structure. The choice of adhesive directly affects the sealing and moisture resistance of the panel.

Polyurethane Edge Sealing

Polyurethane edge sealing is a key step in the production process, aiming to enhance the sealing and waterproof performance of the panels. The specific steps are as follows:  

• Sealing on Both Sides: Polyurethane material is used for edge sealing treatment on both side edges of the sandwich panel. The sealing width is usually 50mm, preventing the rock wool core material from absorbing moisture and affecting its stability, thereby extending the panel's lifespan.  

  
  

• Polyurethane Sandwich Panel Production Line: The edge sealing process is completed by the polyurethane sandwich panel production line, ensuring uniform and smooth edge sealing, and avoiding uneven foaming.

Panel Cutting and Customization  

According to customer requirements, the panels are cut to length on the polyurethane sandwich panel production line. The conventional effective width is 1000mm, and the length can be customized as needed, facilitating transportation and installation.  

Packaging and Transportation  

The qualified sandwich panels produced by the polyurethane sandwich panel production line are packaged before leaving the factory. The packaging materials are usually wrapped with protective film, and foam strips are placed at the bottom for shockproof and moisture-proof, ensuring no damage during transportation.

The polyurethane sandwich panel production line reflects the efficiency and precision of modern industrial manufacturing. From material selection to final product inspection, each step strictly follows process standards to ensure product quality and performance. The automated polyurethane sandwich panel production line and advanced process technology, such as roll forming, polyurethane edge sealing, and computer-integrated control, not only improve production efficiency but also ensure the appearance and practicality of the product. The composite material produced by the polyurethane sandwich panel production line, with its excellent fireproof, insulation, soundproof, and waterproof performance, has become the ideal choice for modern construction.