PIR Continuous Sandwich Panel
Production Line

•  Hydraulic Decoiler
•  Filming and Pre-cutting
•  Roll Forming
•  Pre-heating
•  Double Belt with Foam
•  Band Saw Cutting
•  Cooling System
•  Stacking System
•  Packing System

Decoiling System is to feed the color steel sheet to the sandwich panel production line continuously .Usually the production line includes upper and down decoilers. Each set of decoiler includes coil car, hydraulic station, main decoiler, with assistant support.

The plastic film can protect the surface of steel panel to avoid scratch. The filming looks simple but very difficult to get good flatness of filming,our technical team has resolved this difficult problem after more than ten years experience accumulation, mainly adopt high precision filming system.The pre-cutter is used for cutting the single skin panel when it needs to change to be another profile.

The PIR sandwich panel is composed of upper steel sheet, middle thermal insulation material and down steel sheet, the up forming machine can be only installed on the above of down roll forming machine, to meet process requirement, not intervene with down roll forming machine and also save workshop space, so a independent installation platform is needed.
Upper roll forming machine is overhead the production line, it is mainly used for producing inner surface of sandwich panel. In order to save the equipment investment, normally upper roll forming machine produce the panels for PIRblic use, so that can meet the requirements of wall panel and roof panel. For special joint panels, adopts quick-changing assembly or double-station roll forming unit, so that can change the profiles. This machine’s feature is adopting Integral hoisting to carry out the quick changing.
Down roll forming machine is very important, it is used for forming outer panel, which will influence the surface quality of sandwich panel. This is one core part of the whole production line, which is one of important steps for guaranteeing the high-quality sandwich panel.

This part adopt hot air cycle heating method, the temperature of air can be adjusted steplessly and high controlling accuracy so that to control the temperature in the suitable range for foaming and solidification, and ensure high quality panels. After panels preheated, there is the thermometer and the temperature of 2 metal sheets is showed on the screen, easy to see.

The high-pressure foaming system comprises a two-component high-pressure foaming system,
Mix well within the required pouring amount and mixing ratio adjustment range (viscosity: 500~2000cps, B material <50cps, mixing ratio A: B=100:50-120).
The amount of glue applied to the sheet: about 300g/m2 to 600g/m2 (double sided) (adjustable).
Design mixing ratio: A: B = 100: 50 - 120 (adjustable).
Working height of the glue spraying device: The upper plate is about 1500± 100 mm.
Lower plate approximately 1250±100 mm.

Double belt conveyor machine is the core unit for the high quality Polyurethane Sandwich panel production line. It is mainly used to overcome the expansibility of foaming and make it to solid, and decide the panel thickness and the production speed .Side belt is overcome horizontal expansion and decide the width of panel and guiding to panels.
Now the structure of the side seal module is driven by two sides large chain wheel, modules are separated, what means the modules and belt plates are separated individually. Removable type that is convenient for changing profile type.The side modules are processed on CNC machine, so get high precision and high efficiency.

Band saw is used for cutting the composite panels which come out from double-belt into fixed length to meet the requirements of different orders.
Band-saw includes encoder device, clamping device, saw blade guiding rotary part, band saw part, working table, dust-extraction device, flexible roller path, fast roller and so on.