Basic Information
Due to the insertion of pins, the ability to mix, knead and plasticize is strengthened. Under the same extrusion conditions, the working length of the screw can be shortened by 2D-4 compared with the ordinary cold-feed extruder, because the aspect ratio becomes smaller. , The time that the material stays in the barrel is shortened. Almost all of the rubber extruder machine used for the rubber compound uses a pin-type cold-feed rubber extruder. In the production of bias tires, in recent years, it has become a general trend to use pin-type cold-feed rubber extruder instead of hot-feed extruder, which has developed rapidly, such as compound tread extrusion, various apex, and various types of rubber. For extrusion, many production plants use pin-type cold-feed rubber extruders. In the production of rubber hoses, pin-type cold-feed rubber extruders are also used for inner and outer rubber extrusion.
Work Phase
The work is divided into four phases: in the first phase, the machine must accept the feeding material, convey and compact the compounded rubber; in the second phase, the rubber must be heated and plasticized to make it a more flowable block; the third phase The extruder must mix and heat homogenize the compound; in the fourth stage, pressure must be established to force the compound to pass through the die. For hot-fed extruders, the second and third stages are provided by preheated open mills.
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