摘要:
A device for manufacturing a chopped fiber bundle includes a cutter roll provided with one or more disk blades on a circumference of a roll core having a center axis coinciding with a rotation axis of the roll core and a nip roll provided in parallel with the rotation axis of the roll core, to feed a reinforcing fiber yarn to be continuously cut between the nip roll and the cutter roll, further including a rotary drive mechanism that rotates the cutter roll and at least one of: a reciprocating drive mechanism that reciprocates the cutter roll along the rotation axis of the roll core; and a traverse guide that traverses the reinforcing fiber yarn along the rotation axis of the roll core.
摘要:
Manufacturing a spun-dyed para-aramid filament yarn includes (a) preparing a spin dope comprising a para-aramid polymer, at least one dyestuff and concentrated sulfuric acid, (b) spinning the spin dope through a spinneret to obtain spun filaments, (c) coagulating the spun filaments to obtain coagulated filaments, (d) neutralizing the coagulated filaments to obtain neutralized filaments, (e) washing the neutralized filaments to obtain washed filaments, and (f) drying the washed filaments to obtain dried filaments. In step a) the spin dope includes 17.5 to 18.5% by weight of a para-aramid polymer with respect to the weight of the spin dope, and 4 to 15% by weight of the at least one dyestuff with respect to the weight of the para-aramid polymer plus the at least one dyestuff. In step f) the filaments are hold under a tension in a range from 0.2 to 0.8 cN/dtex.
摘要:
A continuous in-line flock cutting process is disclosed, for making flock from tow which contains a lubricant which is detrimental to the flock and must be removed.The tow is continuously fed, heat treated and immersed in an aqueous scouring liquid, and is continuously wet-processed. The excess scouring liquid is squeezed out, the tow is rinsed with water, rinse water is squeezed out, and a finish is applied to the tow and partially squeezed out in an in-line continuous process to remove a portion of the applied finish. Thus processed, the still-wet tow is continuously cut into wet flock, the wet flock is then dried and beaten to open up and separate the individual flock particles, and screened.
摘要:
A process for transforming continuous synthetic fibre strip into cut strip suitable for feeding spinning machines of the wool or cotton type, consisting of subjecting the fibre strip to a first stage of continuous transverse incision and then to a second stage of longitudinal tearing. The apparatus carrying out this process comprises a helical knife followed by a plurality of rollers.
摘要:
A carding engine provided with a rotary type web stripping device for stripping a web of material from a doffer cylinder having a stripping roller assembly which includes a plurality of stripping rollers having stripping combs associated therewith. A differential gear train assembly interconnects the stripping roller assembly and the stripping rollers such that the stripping rollers are rotated in a direction which is opposite to that direction in which the stripping assembly is rotated, the stripping combs of the stripping rollers being positioned adjacent the doffer cylinder so as to safely strip the web of material therefrom. As the stripping combs strip the material from the doffer cylinder, the stripping rollers are subsequently rotated by the gear assembly so as to positively release the material from the combs whereupon the material may then be conveyed to delivery rollers.