Single-screw extruder principle: the second section is called compression section when the screw groove volume from large gradually become smaller, and the temperature to reach the degree of plasticisation of the material, here to produce compression by the conveyor section of the three, where the compression to one, which is called the compression ratio of the screw - 3:1, there are also variations in the machine to complete the plasticisation of the material into the third section.
Single-screw extruder principle: the third section is the metering section Here the material to maintain the plasticising temperature, just like the metering pump as accurate, quantitative delivery of melt material to supply the head, the temperature can not be lower than the plasticising temperature, generally slightly higher.
Single-screw extruder is mainly used for extruding soft and hard PVC, polyethylene and other thermoplastic plastics, which can process many kinds of plastic products, such as film, pipe, plate, ribbon, etc. with the corresponding auxiliary machine (including moulding head), and can also be used for granulation.
Plastic extruder has advanced design, high quality, good plasticisation, low energy consumption, and adopts involute gear transmission, which has the features of low noise, smooth running, large bearing capacity and long service life.
Single Screw Extruder Application
Sheet and plate extrusion: suitable for PVC, PET, PS, PP, PC and other profiles and plate extrusion. Extrusion of other kinds of plastics such as silk, rods and so on.

Profile extrusion: Adjusting the speed of extruder and changing the structure of extrusion screw can be applied to the production of PVC, polyolefin and other plastic profiles. Modified pelletising: it is suitable for blending, modifying and reinforcing pelletising of various plastics.
Single-screw extruder is one type of plastic extrusion line.
Extrusion moulding in plastics processing is also known as extrusion, in the non-rubber extruder processing using hydraulic pressures in the mould itself is called extrusion press out. It refers to the material through the extruder barrel and the role of the screw between the side of the heat plastification, while being pushed forward by the screw, continuously through the head and made of a variety of cross-section products or semi-products of a processing method.

Raw materials from the hopper into the barrel, under the action of screw rotation, through the barrel wall and screw surface friction shear action forward to the charging section, where the loose solids forward at the same time be compacted; in the compression section, the depth of the screw groove becomes shallower, and further compacted, at the same time in the barrel outside the heating and screw and barrel wall friction shear action, the material temperature rises to begin to melt, the end of the compression section; homogenisation section so that the material is uniform, fixed temperature, Fixed amount, fixed pressure extrusion melt, to the head of the machine after moulding, after shaping to get products.
1、Extrusion method
According to the plasticising method: dry extrusion and wet extrusion.
According to the way of pressurisation: continuous extrusion and intermittent extrusion.
2、Features continuous production, high efficiency, simple operation, wide range of applications.

Nanjing Suminoe Precision Machinery Co., Ltd. has a professional sheet production line, the company's main sheet machine manufacturing production line: PET/PRET sheet production line, PP sheet production line, PP vacuum profile extrusion line, PP/PC vacuum sheet production line, PC/PP corrugated sheet production line, PVDF photovoltaic backing sheet production line, PMMA acrylic sheet production line, PE waterproofing membrane production line, high-performance barrier sheet production line. High-performance barrier sheet production line, optical panel production line, multilayer co-extruded sheet production line, etc.
Address:No.11, Dongshanqiao Pioneering Road, Jiangning District, Nanjing, Jiangsu Province, China.