Continental Group announced plans recently that from January 1, 2011, the price of summer replacement tires for all car brands in mainland China will increase by 5%. The mainland said that the increase in tire prices was due to the substantial increase in the prices of major types of natural rubber. The price of natural rubber has exceeded 3 US dollars per kilogram, setting a record high price. Hartmut Wöhler, director of automotive tire marketing at Continental, said: “Increase tire prices to offset the cost of raw material price increases in 2010. We set the price start date on January 1, 2011 so that we can concentrate on developing the winter tire business. †According to the mainland, 40% of a tire consists of natural rubber, which is the most important raw material for tire production. Currently, the mainland is trying to find a material that can replace natural rubber without changing the characteristics of the tire.
Single screw extrusion uses one screw within a cylindrical barrel to continuously push plastic through a constant profile die. Production rate is typically measured in mass per hour (lb/hour or kg/hour) and is controlled by the screw speed of the machine.
Most extruder products are produced using single screw extrusion. Parts such as window frames, house siding, and weather stripping, which have a constant profile, are generally produced by means of single screw extrusion. Due to such factors as the melt swelling as it exits the die, the die design for an extruder is critical. Great complexity is sometimes needed with an extrusion die in order to gain the correct profile.
The two largest industries for extrusion are pipe and tubing extrusion and film and sheet extrusion. There are many other industries that use extrusion to create their products though. Fiber extrusion, for clothing, coating extrusion, and blown film extrusion are just a few of the others.
Extrusion Single Screw Barrel,Single Screw Barrel,Single Screw Extruder Barrel,Single Screw Extruder Screw Barrel Ningbo Jinyi Precision Machinery Co., Ltd. , https://www.jinyi-machinery.com