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The role and composition of the center feeding system of the extruder

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The center feeding system is a part of the raw material system of the film production line and is responsible for the feeding of the main extruder. The main extruder has a production capacity of 3.5t/h. During the production process, the main material, recycled material, and additives are precisely dosed by the loss-in-weight metering feeder, sent to the mixing hopper by the pneumatic conveying system, mixed with the crushed trimmings recovered online, and then fed to the extruder by the loss-in-weight metering feeder which is synchronized with the extruder capacity. This article briefly introduces the role and composition of the center feeding system.


Here is the list of contents

  • Composition of the center feeding system of the extruder

  • Usage of center feeding system


Composition of the center feeding system of the extruder

  • Roots fan: provides power for the pneumatic conveying of the raw material to the mixing hopper.

  • Loss-in-weight metering: a loss-in-weight metering feeder for main material, loss-in-weight metering feeder for recycled material, loss-in-weight metering feeder for additives.

  • Rotary valve: effectively realize the continuous and batch supply of raw materials to the pneumatic conveying system to ensure the normal operation of the system.

  • Vacuum feeder: The additive is automatically transported to the storage hopper above the loss-in-weight metering feeder.

  • Cyclone separator: This device separates the raw materials, flaky crushed side materials, and high-pressure airflow from the pneumatic conveying to the mixing hopper.

  • Dust collector: The high-pressure airflow separated by the cyclone separator also carries dust, which is removed by the dust collector.

  • Metal separator: The raw material and flake crushing trimmings are removed from the metal material that may be carried into the melt chamber to protect the screw from damage.

  • Mixing hopper: Mix raw materials, additives and flake crushed trimmings evenly and prevent the crushed trimmings from bridging and not feeding smoothly.

  • Dosing loss-in-weight metering feeder: feeds the main extruder with precise dosing.


Usage of center feeding system

  • Achieves 24-hour unmanned continuous forming operation

  • Changeable forming machine with multi-species and multi-color material as required

  • Fully automatic regeneration and use of cold material in the injection port

  • Automation of the coloring process

  • Centralized control of all mold temperatures

  • Prevention of blockage in the storage bin

  • Labor-saving through the installation of a central monitoring station

  • Centralized transport of pellets in this system


Zhangjiagang Chenxing Machinery Co., Ltd., its predecessor is Sanxing Plastic Machinery Factory. It evolved into a joint-equity enterprise in 1996 from the former collective enterprise. Founded in 2002, Chenxing Company is specialized in producing plastic machinery equipment. Located in the beautiful, national sanitary city -Zhangjiagang, east to Shanghai, west to Nanjing, Chenxing enjoys facilitated traffic. Chenxing Company has always taken acting as the industry model, creating plastic machinery top-class products as its enterprise's objective, integrity first, service foremost as its business motto, offering more detailed technical support and service for customers both at home and abroad.

Our company has many years of experience in producing plastic machinery and equipment, and always takes the enterprise purpose of being the model of the industry and creating first-class products of plastic machinery, and insists on providing more detailed technical support and service for domestic and foreign customers with the business purpose of integrity first and service first. If you are interested in our products, welcome to contact us!


Zhangjiagang Chenxing Machinery Co., Ltd., its predecessor is Sanxing Plastic Machinery Factory. It evolved into a joint-equity enterprise in 1996 from the former collective enterprise. 

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