PU Continuous Sandwich Panel Production Line

The PU continuous sandwich panel production line is a highly automated industrial equipment dedicated to producing polyurethane (PU) sandwich panels, widely used in building insulation, cold chain logistics, decoration and other fields.

sandwich panel line

The PU continuous sandwich panel production line is a highly automated and efficient industrial equipment specifically designed for producing polyurethane (PU) sandwich panels. This production line can continuously manufacture various types of sandwich panel products, including cold storage panels, wall panels, roof panels, and soft faced coil composite panels, which are widely used in fields such as building insulation and cold chain logistics. The modern PU continuous sandwich panel production line adopts advanced n-pentane foaming system (excluding some products), which has the characteristics of high production efficiency, stable product quality, and high degree of automation. The production line can produce sandwich panels with different core materials (such as polyurethane or rock wool) as needed to meet diverse market demands.

A complete PU continuous sandwich panel production line consists of multiple precision coordinated systems:

• Raw material processing system
  Uncoiling system: used for unfolding metal coils
  Steel plate feeding and automatic docking system: ensuring production continuity
  Reinforcement unit: increases structural strength for steel plates

• Forming and Composite Systems
  Forming machine system: Process the flat plate into the desired cross-sectional shape
  Corona system: improving the adhesion performance of steel plate surface
  Steel plate preheating system: optimizing bonding conditions
  Double track machine and heating system: controlling the foaming process

• Foam system
  N-pentane foaming system: used for polyurethane foaming
  Rock wool automatic cutting and conveying system (optional)

• Post processing system
  Cutting system: including band saw and disc saw, suitable for different finishing requirements
  Coating equipment: protecting the surface of the product
  Cooling equipment: ensure product shaping
  Automatic palletizer: Classify and stack finished products
  Packaging system: Complete product packaging

• Auxiliary system
  Chemical material storage system (Class A/Class C)
  conveying system
  Dust removal and environmental protection equipment: ensure emissions meet standards
  Tank area and safety system

The production process of PU continuous sandwich panels is highly automated, with the main steps including:

• Metal coil processing
  Open book: Unfold metal coil
  Cutting and laminating: Cut and protect the surface as needed
  Pressing: Processing the required plate shape through a pressing unit

• Surface treatment
  Corona treatment: improve surface energy and enhance adhesion
  Preheating: bringing the metal plate to a suitable temperature

• Foam molding
  Polyurethane raw material mixing: precise proportioning through high-pressure foaming machine
  Pouring: evenly pour the mixture onto the lower substrate
  Laminated foaming: Foam curing and molding in a double track machine

• Shaping and post-processing
  Cooling and shaping: Natural cooling through a non powered roller conveyor
  Edge trimming: Remove excess material on both sides
  Fixed length cutting: precise cutting according to the set length

• Packaging and storage
  Film protection
  automatic palletizing
  packing and shipping

The products produced by the PU continuous sandwich panel production line are widely used in:

• Construction field
  External wall insulation system
  Roof insulation and waterproofing system
  Steel structure building enclosure system
  Purification workshop partition wall

• Cold chain logistics
  Cold storage construction
  Manufacturing of refrigerated truck body
  Cold chain equipment insulation

• Industrial applications
  noise barrier
  Air conditioning supply duct
  Industrial plant insulation

The modern PU continuous sandwich panel production line has multiple technological advantages:

• High degree of automation
  Automated control of the entire process from raw materials to finished products
  PLC touch screen control system, easy to operate
  Automated palletizing reduces manual intervention

• Production flexibility
  Can quickly switch between producing products of different thicknesses and widths
  Suitable for various surface materials (color steel plate, aluminum plate, non-woven fabric, etc.)
  Can produce various core materials (polyurethane, rock wool, etc.) products

• Stable product quality
  Accurate temperature and speed control ensures foam quality
  High precision cutting system ensures product dimensional accuracy
  Uniform laminating pressure ensures consistent density of the board

• Environmental protection and safety
  Compliant with environmental emission standards (such as non methane total hydrocarbon emissions)
  Combustible gas monitoring system ensures safe production
  Closed vacuum system improves working environment

• Energy saving and efficient
  Hot air circulation system reduces energy waste
  Efficient insulation design reduces heat loss
  Variable frequency speed regulation technology saves energy

The core functions include:

• Multi category production: It can produce four major categories of products: cold storage panels, wall panels, roof panels, and soft surface roll composite panels. It is compatible with two core materials, rock wool and polyurethane, to meet the fire prevention and insulation needs of different scenarios.
  

• Environmental Protection Process: Adopting n-pentane foaming system (excluding rock wool board) to reduce the environmental pollution caused by traditional fluorine foaming agents, in line with the trend of green manufacturing.
  

• Customized design: Supports flexible adjustment of board thickness of 20-150mm and width of 400-1200mm, with customizable length to meet diverse engineering needs.

Key equipment composition and technical highlights

• Full process automation system
  Uncoiling and Forming: Hydraulic Uncoiler, Reinforcement Unit, High Frequency Corona Equipment.
  Foaming and shaping: Double track laminating machine, n-pentane high-pressure foaming system.
  Post processing units: automatic trimming machine, fixed length saw cutting machine, laminating packaging equipment.

• Innovative technology application
  Intelligent temperature control: dual heating mode of electric heating tube and fuel furnace, combined with PLC real-time adjustment to ensure foam uniformity.
  Synchronous lifting hydraulic system: Accurate positioning of the upper track is achieved through 16 sets of oil cylinders to ensure consistent thickness of the sheet metal.
  Safety protection: Combustible gas monitoring device and emergency exhaust system meet the safety standards for Class A chemical material storage.

The PU continuous sandwich panel production line, as a modern industrial equipment, is driving the sustainable development of the building insulation materials and cold chain building materials industry with its efficient, stable, and environmentally friendly production characteristics. With the advancement of technology and the growth of market demand, such production lines will play an important role in more fields.