I. Equipment Application

This production line is designed for manufacturing rubber cord fabric and calendered pure rubber sheets.

II. Operating Conditions

1. Ambient Conditions for Equipment Operation
Ambient temperature: 7~40°C
Maximum relative humidity: 95%

2. Utilities
- Power supply: 380V, 50Hz, three-phase
- Compressed air: 0.6~0.8 MPa
- Cooling water: 0.4 MPa

III. Technical Specifications & Parameters

1. Line speed: 4–40 m/min
2. Maximum width of calendered rubber sheet: 1600 mm

IV. Supply Scope

| Item | Quantity |
| ---- | ---- |
| Unwinding Unit | 1 set |
| XY-4S 610×1730 Four-Roll Rubber Calender | 1 set |
| Eight-Roll Cooling Unit | 1 set |
| Unwinding & Winding Unit | 2 sets |

V. Overview of Equipment Components

(I) Main Machine Technical Specifications

1. Technical Parameters

1.1 Rolls

- Roll diameter: Φ610 mm
- Working length of rolls: 1830 mm
- Roll structure: Hollow smooth roll
- Roll surface hardness: 68–72 Shore Hardness
- Roll surface roughness: Ra1.6
- Roll arrangement: S-type

1.2 Roll speed ratio: 1 : 1.4 : 1.4 : 1

1.3 Roll linear speed: 4–40 m/min

1.4 Gap Adjustment Device

- Adjusting speed: 3.6 mm/min
- Adjusting range: 0–10 mm working range
- Motor power: 1.1 kW

1.5 Oil Circulation Lubrication System

- Oil pump flow rate: 8 L/min
- Motor power: 0.25 kW

1.6 Main Drive Motor

- Rated power: 185 kW
- Rated speed: 1000 r/min

2. Main Components List

- Machine frame assembly: 1 set
- Rolls & bearing assemblies: 4 sets
- Gap adjustment devices: 3 sets
- Rubber baffles: 2 sets
- Reducer: 1 set
- Main drive motor: 1 set
- Lubrication system: 1 set
- Electrical control system: 1 set

3. Structural Description

3.1 Machine Frame

1. Housing: Fabricated by welding, fully annealed, precision machined all over. High rigidity, non-deformable; sliding surfaces are smooth, flat and wear-resistant.
2. Base: Welded base, annealed then precision machined, featuring excellent rigidity and anti-deformation performance.

3.2 Rolls & Bearing Assemblies

1. Roll structure: Hollow smooth roll
2. Material: Alloy chilled cast iron LTH-H
3. Hardness: 68–72 HSD
4. Chilled layer thickness: 10–25 mm
5. Main bearing: Four-row radial cylindrical roller bearing (Wafangdian Metallurgical Bearing)
6. Bearing housing: Cast, tempered and machined, equipped with lubrication oil ports
7. Maximum gap protection for rolls
8. Roll temperature control adopts high-quality rotary joints and stainless steel metal hoses

3.3 Gap Adjustment Device

1. Adjusting speed: 3.6 mm/min
2. Drive motor power: 1.1 kW
3. Gap adjustment applies to the 1st, 2nd and 4th rolls; both-side synchronous adjustment or single-side independent adjustment is available.

3.4 Transmission Mode

The motor drives the rolls through reducer, pin coupling and speed ratio gears.

3.5 Reducer

1. Type: Single motor input, single output shaft
2. Gear type: Hardened tooth surface

3.6 Main Drive Motor

Variable frequency motor equipped with variable frequency drive for speed regulation.

3.7 Lubrication System

1. Bearing lubrication: Equipped with an oil tank, including flow regulators, oil temperature gauge, cooler and filter, to control flow rate, reduce lubricant temperature and guarantee oil cleanliness.
2. Thin oil lubrication pipelines

(II) Auxiliary Machine Technical Specifications

1. Tension Unwinding Unit (with Magnetic Particle Brake)

1.1. Square steel size: 45×45 mm
1.2. Maximum cord fabric width: 1600 mm
1.3. Maximum roll diameter: Φ1000 mm
1.4. Magnetic particle brake model: PB20

2. Eight-Roll Cooling Unit

- Cooling roll size (working diameter × length): Φ570×1900 mm
- Max cooling water pressure: 0.3 MPa
- Traction roll size (working diameter × length): Φ570×1900 mm
- Traction roll linear speed: 4.5–45 m/min
- Motor power: 18.5 kW

3. Unwinding & Winding Unit

- Winding speed: 5–50 m/min
- Max liner cloth unwinding diameter: Φ800 mm
- Max winding diameter: Φ1000 mm
- Square shaft size: 45×45 mm
- Motor power: 7.5 kW