Steel Belt Sandwich Panel Line

Modern construction demands materials that are **strong, lightweight, easy to install, reliable, and durable**. High-pressure rigid polyurethane (PU) foam meets all these requirements while offering **exceptional fire resistance and thermal insulation**, making it ideal for applications such as:
Cold storage & refrigeration
Hospitals & healthcare facilities
Automotive manufacturing
Stadiums & large-scale structures
Villas & high-end buildings

Our high-pressure PU production line** delivers superior performance, matching global industry standards with the following advantages:

**Key Benefits:**
1. **Fire Resistance** – Complies with **B2-grade fireproofing** standards.
2. **Thermal Insulation** – Achieves refrigeration/cold-storage-level efficiency.
3. **Superior Foam Quality** – High-pressure mixing ensures **homogeneous AB material distribution**, enhancing foam consistency and **extending service life**.
4. **Cost Efficiency** – **7–9% raw material savings** vs. low-pressure systems.
5. **Self-Cleaning System** – Nozzles require **no manual cleaning**, reducing maintenance effort.
6. **Automated Flying Saw Cutting** – Minimizes labor costs with precision cutting.
7. **Safety Assurance** – Patented **pressure detection protection** for stable, safe operation.
8. **Customizable Options** – Available with **dual-sided metal cladding** (thickness: **50mm, 70mm, 100mm**).

### **Why Choose Our PU Line?**
By integrating **advanced automation, material efficiency, and stringent safety controls**, our system optimizes productivity while ensuring long-term durability—making it the **preferred choice for high-performance insulation solutions worldwide**.

2 sets of 5 Tons Hydraulic Decoiler with Loading Car

2 Sets of roll forming machines

Double Roll Forming Machine – Precision & Efficiency for Your Production Line

Among the core components of the production line, the double roll forming machine plays a critical role in ensuring synchronous, precise, and efficient material shaping. This advanced equipment processes raw materials into predefined dimensions and profiles using high-precision roll forming technology, meeting strict product specifications.

1 set of high pressure PU Foaming System

**Principle and comparison of high-pressure foaming and low-pressure foaming of polyurethane**

1. Low-Pressure Foaming
Principle:
Mechanical mixing: Mix material A (isocyanate) and material B (polyol + additives) by low-speed stirring (200-1000 rpm), and inject them into the mold by gravity or low pressure.
Chemical reaction: Isocyanate (-NCO) reacts with polyol (-OH) to form polyurethane, accompanied by the formation of CO₂ bubbles (foaming agent effect).
Features:
– The mixing accuracy is low, and problems such as uneven bubbles and inconsistent density are prone to occur.

2. High-Pressure Foaming
Principle:
High-pressure impact mixing: A and B materials are accurately measured under high pressure (100-200 bar) and instantly mixed (mixing time <1ms) by high-precision collision mixing heads.
-Atomization mixing: High pressure makes the raw materials atomized to ensure uniform mixing at the molecular level.

Core advantages of high-pressure foaming:
1. More uniform mixing and finer pores
– High-pressure atomization can reduce dead zones and avoid defects caused by unmixed materials (such as lumps and uneven bubbles).
2. Higher production efficiency
– Suitable for automated continuous production.
3. Less material waste
– The mixing head is self-cleaning, with a residual amount of <0.1%, which reduces raw material loss and can save 7-9% of raw materials compared to low-pressure foaming.
4. Better product performance
– The pore structure is more uniform.

High-pressure foaming technology is superior to low-pressure foaming in terms of mixing accuracy, production efficiency and product performance, and is particularly suitable for high-end manufacturing.

1 set of pu host machine

The length of the PU mainframe is usually 25 to 30 meters, which is determined by the drawings provided by the customer and the required foaming thickness. In order to better meet the production needs of customers, the equipment is designed with full consideration of the diversity and flexibility of different product specifications so that it can adapt to various production scenarios.

Our mainframe adopts a rubber belt transmission system, which not only ensures the stability and efficiency of the equipment during operation, but also significantly reduces the manufacturing cost of the machine. Compared with traditional transmission methods, rubber belts are excellent in shock absorption and wear resistance, thereby extending the service life of the equipment, reducing maintenance frequency, and saving subsequent operating costs for enterprises.

1 Whole set of PLC Control System

The whole main machine consists of 3 parts: roll forming machine, PU foaming system, and shearing system. Each part has an independent electronic control system, and the 3 systems can be operated intelligently online.

1 Flying Cutting System

Servo motor cutting system

1 Pneumatic Stacker

1. Grab Length: 1.5-12m
2. Grab Width: 930-1160mm
3. Maximum Grab Weight: 500kg
4. Automatic Flip
5. Fully Automatic Computer Control

1 Wrapping Packaging Machine   

1. Packaging Dimensions: 1200 x 1000
2. Product Weight: 2 tons
3. Packaging Material: Stretch Film
4. Stretch Film Dimensions: Width 500mm, Diameter within 250mm
5. Stretch Film Core Inner Diameter: 75mm
6. Packaging Method: Horizontal Conveyor Rotary Packaging
7. Film Loading Method: Ring Drives Mold Rotation
8. Conveyor and Ring Speeds Adjustable by Frequency Converter
9. Roller Length: 10 meters for both front and rear ends of the wrapping machine