New High-Efficiency Twin Screw Rubber Extrusion Sheet Machine For Compound Rubber Mixing Production

Twin screw extruder sheet machine introduction:

The rubber compounding twin-screw extruder is a key equipment in the field of rubber processing, with the following characteristics and applications:

I Structure and Principle

1- Twin-screw system: The core of the equipment is two intermeshing screws, which rotate in the same or opposite directions to transport rubber raw materials, compounding agents, etc. from the hopper to the inside of the barrel. The different pitch and thread segment combinations on the screw will produce strong shearing, extrusion and stirring effects, allowing various materials to be mixed quickly and evenly, which is much more efficient than the mixing efficiency of a single-screw extruder.

2- Extrusion part: The fully mixed rubber material is extruded through a die of a specific shape under the push of the screw to form a continuous rubber strip or film prototype, preparing for subsequent molding.

3- Tabletting link: The extruded material immediately enters the tablet press, and passes through multiple sets of rollers. Under the pressure of the rollers, the rubber strip is pressed into a film with a specified thickness, width and a smooth surface, which is convenient for subsequent cutting, vulcanization and other processes.
II- Advantages
1- High mixing quality: It can make rubber and various additives, such as carbon black, vulcanizer, antioxidant, etc., evenly dispersed at the micro level, improve the performance stability of rubber products, and reduce the defective rate.
2- Improved production efficiency: Compared with traditional intermittent mixing equipment, the continuous extrusion and sheeting process has a large output per unit time, which is suitable for large-scale rubber product production.
3- High degree of automation: It can be equipped with automatic feeding, temperature control, and metering systems to accurately control production parameters and reduce manual intervention and labor intensity.
III- Application scenarios
1- Tire manufacturing: Used to prepare films for various parts of tires, such as treads, sidewalls, and cord layer lamination films, to ensure tire quality and safety.
2- Rubber seals: High-precision, high-quality films required for the production of oil seals, O-rings, etc., meet the strict standards of the sealing industry.
-3 Conveyor belt production: Mixing, extrusion, and pressing of cover rubber and base belt films for conveyor belts to ensure the wear resistance and tensile resistance of conveyor belts.

Overview of main structure
4.1 Extrusion device
The extrusion device is mainly composed of two screws, barrel, bearing, bearing seat, rubber baffle, etc. Two conical twin screws rotate in opposite directions, and the screws are supported by thrust radial symmetrical spherical roller bearings and double-row radial spherical roller bearings.
4.1.1 Screw: The inner cavity of the screw is cooled by water, and the surface of the screw in contact with the rubber is plated with hard chrome.
4.1.2 Barrel: The inner cavity of the barrel is jacketed and cooled, and the inner surface of the barrel in contact with the rubber is plated with hard chrome, and the barrel is 15° to the horizontal plane.
4.1.3 Rubber baffle: The part where the rubber baffle contacts the rubber is plated with hard chrome.
4.2 Tablet pressing device
The tablet pressing device is mainly composed of upper and lower rollers, a distance adjustment device, left and right brackets, etc. The two ends of the rollers are supported by rolling bearings, and the distance between the two rollers is adjusted by the distance adjustment device.
4.2.1 Roller: Made of alloy chilled cast iron. The working surface hardness of the roller is 68~75HSD.
4.2.2 Distance adjustment device: electric distance adjustment.
4.2.3 Emergency stop device: an emergency stop switch is installed above the tablet press.
4.2.4 Safety device: a safety sheet is set to protect the roller.
4.3 Feeding trough
The rubber material is stored on the feeding trough for screw conveying.
4.4 Base
The main machine base is a steel plate welded structure.
4.5 Transmission system
The transmission system consists of a motor, a reducer, a coupling, etc.
4.5.1 Tablet reducer: mainly provides power for the roller. The gear is a hard tooth surface gear, and the gear surface is surface treated and ground to ensure accuracy.
4.5.2 Extrusion reducer: mainly provides power for the screw. The gear is a hard tooth surface gear, and the gear surface is surface treated and ground to ensure accuracy. .
4.5.3 An elastic coupling is used between the main motor and the reducer.
4.6 Dry oil lubrication system
An electric grease lubrication pump is used.
4.7 Cooling pipeline system
Two separate circuits are used for extrusion and tableting to cool the main parts. The extrusion screw and barrel are a cooling circulation loop; the upper and lower rollers use a cooling circulation loop.

Technical Parameters: