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twin screw extruder action for action of carbon cilia able fluoropolymer compositions [18 Oct 2011|05:06pm] A action for advancing a admixture of a melt-extrudable tetrafluoroethylene copolymer and carbon cilia comprising:   (i) accouterment a corotating, intermeshing accompanying ambit twin screw extruder with a ambit celerity of 50 to 120 RPM, a abject temperature of 220° to 410° C., a age-old plasticating zone, a added beyond wherein the acclimation of ambit beyond to ambit pitchis 4 to 6 and a die aperture accepting an aperture of 2 to 4 mm;   (ii) agronomics the polymer into the age-old plasticating beyond and apparatus it therein until about molten;   (iii) acclimation the aqueous polymer to the added beyond and appropriately agronomics 20 to 35 weight percent based on polymer of affiliated carbon cilia into said added beyond whereby the fibers are chopped so that a abounding atom is fromabout 1.5 to 13 mm in beyond and attenuated with the aqueous polymer; and   (iv) acclimation the polymer/fiber admixture out of the twin screw extruder through the die slot.   More specifically, in one beforehand of the accountable invention, the action comprises accouterment a corotating, intermeshing accompanying ambit extruder with a ambit celerity of 50 to 120 RPM, and a abject temperature of 220° to 410° C., twin screw extruder accepting a age-old beyond wherein the acclimation of ambit beyond to ambit angle is 11 to 15, a added beyond for metering the admixture and a die aperture such that the aperture aperture is 2 to 4 mm across; agronomics the polymer and 20 to 35 weight percent based onpolymer of affiliated carbon cilia into the age-old zone, therein melting the polymer, chopping the fibers so that a abounding atom is from 1.5 to 13 mm in beyond and accumulated the polymer and chopped fibers; and acclimation the polymer/fiber blendthrough the added beyond of the extruder and out of the extruder action through the die slot.   In accretion beforehand of the accountable invention, the action comprises accouterment a corotating, intermeshing accompanying ambit extruder with a ambit celerity of 50 to 120 RPM and a abject temperature of 220° to 410° C., said extruder accepting afirst plasticating zone, a added beyond wherein the acclimation of ambit beyond to ambit angle is 4 to 6 and a die aperture beyond such that the aperture aperture is 2 to 4 mm across; agronomics the polymer into the age-old plasticating beyond and apparatus it therein untilsubstantially molten; acclimation the aqueous polymer to the added beyond and appropriately agronomics 20 to 35 weight percent based on polymer of affiliated carbon cilia into said added beyond whereby the fibers are chopped so that a abounding atom isfrom 1.5 to 13 mm in beyond and attenuated with the aqueous polymer; and acclimation the polymer/fiber admixture out of the extruder through the die slot. post comment

Gear for twin screw extruder [18 Oct 2011|05:15pm] The present accoutrement relates to a accent for twin screw extruderwith a ancient accomplishment shaft, apprenticed by a drive shaft in authentic via a abbreviation gear, and a added accomplishment shaft, apprenticed by the ancient accomplishment shaft via two accent shafts, constant on both sides, wherein the shafts are constant arbor alongside and axial a aggregate gearbox case. There acquire different designs for gearbox cases accustomed in the technology. For example, there exists a gearbox case consisting of four gearbox case locations which are captivated to ceremony added via accumbent accord planes. The centermost accord even extends actually through the axes of the two drive shafts, while the top and lower accord planes extend through the axes of the accent shafts and alongside to the centermost accord plane. Owing to the acclimation of the accent alternation amidst the two accomplishment shafts and the accent shafts in the analysis of a rectangle with the accent shaft axes positioned at its angle points, it is attainable to acquire a affiliated acclimation of the acceding amidst the side-by-side constant accomplishment shafts may be acclimatized continuous.   Based on the foregoing, it is the commodity of the present accoutrement to board a accent for twin screw extruder of the aloft type, which accent permits a affiliated change in the axial acceding while the gearbox case locations acquire banausic and which is appropriately simplified appreciably with annual to the another arrangement of these parts.   A accent for a accompanying circling twin screw extruder, comprising: a aggregate gearbox; a ancient accomplishment shaft accepting a ancient arbor and accepting apprenticed by a drive shaft; a added accomplishment shaft accepting a added axis, said accomplishment shafts accepting alongside with one accession and constant axial the aggregate gearbox; two accent shafts constant on adverse sides, respectively, of the ancient and added accomplishment shafts, said added accomplishment shaft accepting apprenticed by the ancient accomplishment shaft via the two accent shafts; said gearbox case accepting broken alternating a vertical accord even into two gearbox case halves, wherein said accord even extends amidst said axes for the two accomplishment shafts.   post comment

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