PLC-Controlled Four-Roll Calender Machine for Double-Sided Coating with 500-2000mm Roller Width
Price:
Negotiable
MOQ:
2set
Delivery Time:
50day
Brand:
Beishun
Product Description
PLC-Controlled Four-Roll Calender for Rubber Cord Fabric Manufacturing
The four-roll rubber calender is essential equipment in rubber processing, designed for pressing and stretching rubber sheets with precision. Our available model weighs 10,000 kg and features a twin-screw design with 85 mm screw diameter and 44:1 length-to-diameter ratio, suitable for PLA and PET raw materials.
With an extrusion diameter range of 800-1500 mm and output capacity of 500-800 kg/h, this equipment meets high-efficiency production demands. Customizable with 600 mm roller diameter, it produces single-layer, double-layer, and multi-layer PET sheets in widths from 600 mm to 1220 mm.
PLC-controlled four-roll calenders are the industry standard for high-volume, double-sided rubber coating of cord fabrics (tire cord, conveyor belt fabric). They achieve precise thickness, uniform cord penetration, and high automation through programmable logic control and advanced roller compensation technologies.
Technical Specifications & Features
| Primary Application | One-pass, double-sided continuous coating (frictioning/skim coating) of tire cord, canvas, and steel cord with rubber compound |
|---|---|
| Core Advantage | Doubles productivity vs. 3-roll calenders; eliminates need to flip fabric for second-side coating, ensuring better cord alignment |
| Control System | PLC (Programmable Logic Controller): Core of automation. Manages speed synchronization, nip adjustment, temperature, and safety interlocks. Brands mentioned: Omron; Options for bus-mastering systems |
| Roller Configuration | S-type / Z-type / L-type (45° or 30° angles). Design minimizes roller deflection and facilitates even sheet formation |
| Precision Devices | Axis Crossing, Roll Bending, Pre-loading: Compensate for roll deflection under load, ensuring micron-level thickness uniformity (±0.02mm tolerance cited) |
| Drive System | Independent Motor Drive: Each roller driven by separate variable-frequency or DC motor. Allows arbitrary speed ratios between rolls for frictioning vs. coating modes |
| Thermal Control | Peripheral Drilling: Rollers feature drilled passages close to the surface for rapid, uniform heat transfer (steam, oil, or water). Typical working temp: 50°C - 150°C |
| Key Specifications | Roll Diameter: 230mm - 900mm+; Working Width: 630mm - 3400mm; Min Thickness: 0.15mm - 0.2mm; Line Speed: 2 - 50 m/min |
| Safety Features | Emergency stop buttons (multiple stations), foot brakes, electro-hydraulic braking (braking distance ≤1/4 roll circumference), and emergency nip opening functions |
PLC-Integrated Calendering Process
Fabric Path Operation
- Upper Sheet Formation: Rubber compound is calendered between Roll 1 & 2, forming a thin sheet adhered to Roll 2.
- Lower Sheet Formation: Simultaneously, another sheet is formed between Roll 4 & 3, adhered to Roll 3.
- Lamination: The cord fabric (warp threads guided via spindle creel and expander rolls) enters the main nip between Roll 2 & 3. The PLC synchronizes speeds so the two rubber sheets laminate onto both sides of the fabric simultaneously.
- Post-Processing: The exiting rubberized fabric is pulled via tension-controlled take-off, cooled, and wound.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Qingdao Beishun Environmental Protection Technology Co.,Ltd
Location
Add: No. 338 mingxi road, Huangdao district, Qingdao China，Postal code: 266400
Contact Person
Alexey Pan