Special two-section BM type screw rod for wire and cable extruder
A wire, cable, and extruder technology, applied in the field of extruder screw, can solve the problems of fast frictional heat generation, material overheating, and large motor power consumption, so as to save energy, improve conveying capacity, and avoid overheating.
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[0021] The present invention will be further described below in conjunction with the drawings.
[0022] Such as Figure 1 to Figure 5 It can be seen that the special two-stage BM screw for the wire and cable extruder of the present invention includes a feeding section 1, a melting section 2 and a homogenizing section 3. The screw is provided with a main thread 4 throughout the entire process, and the melting section 2 A first auxiliary thread 5 and a second auxiliary thread 6 that are connected end to end are provided throughout the entire process. The groove depth h1 of the main thread 4 is greater than the groove depth h2 of the first auxiliary thread 5 and the groove depth h3 of the second auxiliary thread 6.
[0023] The helix angle φ1 of the main thread 4 is smaller than the helix angle φ2 of the first auxiliary thread 5, and the helix angle of the first auxiliary thread 5 is smaller than the helix angle φ3 of the second auxiliary thread 6. As a result, in the melting section...
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