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Address:No.82, feitian avenue, airport development zone, lukou, nanjing.
email:JCTRADEykx@163.com

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What is the screw of plastic extruder?

The release date:2018-01-03
In order to meet the needs of different plastic processing, plastic screw type, there are many common types include the following: the gradient type (isometric ranging from deep), the gradient type (such as deep isometric), mutant, torpedo head type, etc.
The selection of screw type in nanjing extruder mainly depends on the physical properties of plastic and the technical specification of extruder.
(1) finish the softening of non-crystalline polymers in a relatively wide temperature, and generally choose a gradient screw with equal distance. The temperature range of crystallized polymer melt is narrow, and the equidistant mutation screw is generally used.
(2) in small plastic extrusion machine, such as the phi 45 extrusion molding machine screw is equidistant ranging from deep full thread type, screw length to diameter is small, it is mainly used for extrusion, small cross section of insulation and sheath layer extrusion speed faster.
(3) the medium screw adopts the full-thread type with equal pitch and depth gradient, and its long diameter is larger than the small screw, and the pitch of the thread is equal, from the base to the deep. Thread the end of the thread is deeper, the root of the thread, this plastic extrusion amount is more, and shall not affect the strength of screw, extrusion speed, good plastic plasticizing, is generally small and medium-sized squeeze molding machine in the production of insulation and sheath layer ideal screw.
(4) the diameter of a large screw is generally over 150mm, such as 150, 200, and 250 extruder. There are two types of large screws, one is equidistant, such as the 150 and the 200 extruder. 2 it is screw is divided into three segments, namely the isometric iso-volumetric ranging from deep, deep isometric range, not deep, such as the phi 250 extrusion molding machine, compression ratio between 2 ~ 3, length to diameter ratio is controlled in 15:1, mainly for the production of large cross section of wire and cable insulation and sheath layer.


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The contact:Mr. Li
The phone:025-5272 9652
Mobile phone:13851554922
email:JCTRADEykx@163.com
address:No.82, feitian avenue, airport development zone, lukou, nanjing.

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