Single screw extruder
With the wide application and development of plastic extruder molding process, the types of plastic extruders are increasing and the classification methods are not consistent. According to the number of screws, they are divided into single-screw extruders, twin-screw extruders and multi-screw extruders, etc. The following is an introduction to single-screw plastic extruders.Single screw extruder is one of the important molding methods for plastic molding processing. The material is formed from the extruder by heating, mixing and pressurizing, and then continuously passing through the mouth die in a flowing state.
Single Screw Extruder Applications
Most thermoplastics and rubbers can be processed by this method. Single screw extruder is widely used in petrochemical, machinery manufacturing, agriculture, construction and etc.
Composition and principle
The plastic is heated to a viscous flow state, and under pressure, it is passed through the mouth mold with a certain shape to become a continuous body with a cross-section similar to the shape of the mouth mold, and then by cooling, the plastic with a certain geometric shape and size is changed from a viscous flow state to a highly elastic state, and finally cooled and shaped into a glass state to obtain the desired product.
Single screw extruder consists of the following
- Transmission control system: composed of motor, belt drive, gear reducer, etc.
- Heating and cooling system: heater and cooling device, by heating and cooling the barrel and screw to ensure that the process is completed within the range required.
- Extrusion system: It is composed of screw, manifold, etc., which plasticizes powdered plastic into soluble body under the effect of certain temperature and pressure, and then is continuously extruded into the head by the screw.
Single Screw Extruder Gallery
It is mainly composed of control cabinet and electrical control components to control the temperature, speed and power supply of the extrusion process.
The screw is driven to rotate within a certain speed range, and the screw is made to complete the plasticization and extrusion process of the material by ensuring that the screw gets the necessary torque and speed and can rotate evenly in the process requirements.
Heating and cooling systems
By heating and cooling the barrel, screw and other components, the molding process is ensured to be completed within the temperature range required by the process.
The powder or other shape plastic is plasticized into a uniform melt under certain temperature and pressure, and then extruded into the head by the screw with fixed temperature, pressure and quantity.
Single screw extruder features and advantage
1.Continuous production process
2.High production efficiency
3.Wide range of applications, can produce plastic pipes, rods, sheets, films, monofilaments, profiles and hollow products, etc.
4.Low investment and fast payoff
5.Simple structure, easy to operate
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