Cold Resistant PU Sandwich Panel Machine

The dedicated production line for cold resistant polyurethane sandwich panels is an efficient production system developed for extreme low temperature environments, capable of producing polyurethane sandwich panels that maintain excellent performance even in low temperature environments ranging from -40 ℃ to -60 ℃. The entire polyurethane sandwich panel machine consists of modules such as raw material supply system, foaming system, continuous lamination system, cutting system, and automation control system. It adopts advanced temperature control technology and special formula process to ensure stable production and quality of the panels under severe cold conditions.

sandwich panel machine

The cold resistant pu sandwich panel machine generally adopts PLC+touch screen control system, which has remote monitoring and fault diagnosis functions. The average production speed can reach 6-10 meters/minute, and the board width can be adjusted within 1-1.5 meters according to demand. The daily production capacity can reach 2000-3000 square meters.

Core equipment composition and technical characteristics

• Raw material pretreatment system
  The cold resistant production line is equipped with a two-component raw material constant temperature storage tank, adopting a double-layer insulation design and built-in coil heating device, which can maintain the ideal reaction temperature of 25 ± 2 ℃ for polyols and isocyanates respectively. Specially designed low-speed agitator to prevent raw material precipitation, equipped with high-precision mass flow meter, with measurement error controlled within ± 1%.

• High pressure foaming machine system
  Adopting a high-pressure foaming unit, the working pressure can reach 150-200 bar, equipped with a dynamic mixing head to ensure thorough mixing of raw materials in low-temperature environments. The specially designed temperature control module can accurately control the temperature of the mixing chamber at 30-35 ℃, avoiding the problem of insufficient reaction caused by low ambient temperature. The foaming machine is equipped with an automatic cleaning device to reduce downtime.

• Continuous lamination production line
  Double belt press: The upper and lower steel strips are made of special alloy material, with excellent low-temperature resistance and surface mirror treatment (roughness Ra ≤ 0.2 μ m)
  Temperature control system: zone heating design (6-8 temperature zones), with a maximum temperature of up to 180 ℃, using infrared temperature measurement and thermocouple dual feedback control
  Pressure control: The hydraulic system pressure is adjustable from 0.2-0.5MPa and equipped with a pressure balancing device to ensure uniform thickness of the sheet metal
  Cooling section: Water cooling+air cooling dual mode, ensuring that the board is fully shaped before leaving the factory

• Low temperature environment adaptability design
  Integrated insulation design for polyurethane sandwich panel production line, equipped with auxiliary heating devices in key areas
  The transmission system uses low-temperature specialized lubricating grease
  The protection level of electrical components reaches IP54 or above
  Equipped with environmental temperature monitoring and automatic compensation system

Production process flow

• Preparation for loading: Automatic unwinding of metal panels → Surface treatment (cleaning, passivation) → Preheating (60-80 ℃)

• Raw material measurement: Accurately measure polyols, isocyanates, and additives according to the cold resistant formula

• High pressure mixing: The raw materials are thoroughly mixed under high pressure and injected between two panels

• Foaming molding: Complete foaming reaction under temperature and pressure control environment (foaming time 90-120 seconds)

• Maturation and shaping: post curing is completed through a temperature controlled zone

• Fixed length cutting: Infrared positioning automatic cutting, accuracy ± 1mm

• Stacking packaging: automatic stacking, PE film moisture-proof packaging

Key points of maintenance and upkeep

• Daily maintenance:
  Check the working status of the heating system daily
  Regularly calibrate measuring devices
  Clean the mixing head and feeding pipeline

• Seasonal maintenance:
  Replace low-temperature hydraulic oil and lubricating oil before winter
  Check the integrity of all insulation layers
  Test the extreme performance of the temperature control system

• Long term shutdown protection:
  Thoroughly clean the raw material system
  Place moisture-proof agent inside the equipment
  Regularly power on the lubrication system for operation