Last week, chemical prices fell more and less. Rising varieties are mainly carbon-products (nitric acid, melamine) based on synthetic ammonia, and petrochemical feedstock olefins and related derivatives. Falling varieties are concentrated in chemical fiber raw materials, with the largest drop in the viscose and polyester industry chain. Due to the high price of bulk raw materials, there is no significant improvement in terminal demand. Currently, some chemical sub-sectors with poor supply and demand conditions have again experienced large-scale production stoppages. In the later period, it is necessary to observe the intensity of supply contraction, and the largest variable on the demand side still comes from real estate.

Extrusion Parallel Twin Screw Barrel

Twin screw extrusion

Simply described, the twin-screw extruder is a machine consisting of two co-penetrating and self-cleaning identical screws which are mounted on shafts and rotate in the same direction in a fixed closed housing called [barrel" . The twin-screw extruders operate continuously with very short residence times.

The parallel twin screw and the conical twin screw

According to whether the screw axis is parallel or not, the twin screws can be divided into the conical twin screw and the parallel twin screw, where the parallel twin screws are divided into fully intermeshing type, partly intermeshing type, non-engaged type, etc. In the case of parallel screws, the feed end and the die end have the same diameter.

The diameter of the screws in the conical twin-screw extruder is larger at the feed end and smaller at the die end.

Extrusion Parallel Twin Screw Barrel,Parallel Twin Screw Barrel,Twin Screw Parallel,Parallel Twin Screw

Ningbo Jinyi Precision Machinery Co., Ltd. , https://www.jinyi-machinery.com