Method for optimizing melt spinning processes

Abstract

The invention relates to a method for optimizing melt spinning processes. Spinning process parameters are simulated and computed according to target diameters, target crystallinity and target orientation degrees of fibers, and then melt spinning is carried out according to the spinning process parameters obtained by means of simulating and computing. The method includes simulating and computing steps of (1), assigning initial values of material parameters, spinning assembly parameters, the spinning process parameters, stress F(0) at spinneret holes and step lengths H; (2), building melt spinning forming kinetic models; (3), substituting the material parameters, the spinning assembly parameters, the spinning process parameters, the stress F(0) at the spinneret holes and the step lengths H into the melt spinning forming kinetic models; (4), judging whether termination conditions are met or not, acquiring the spinning process parameters obtained by means of simulating and computing if thetermination conditions are met, terminating programs or carrying out a next step if the termination conditions are not met; (5), adjusting the spinning process parameters; (6), returning to the step(3). The method for optimizing the melt spinning processes has the advantages of high production efficiency and capability of saving labor, time and financing costs of experiments.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and in particular relates to a melt spinning process optimization method. Background technique [0002] Melt spinning, also known as melt spinning, or melt spinning for short, is a chemical fiber spinning method in which the polymer is heated and melted, extruded through the spinneret hole, cooled and solidified in the air to form fibers. Polyester fibers, polyamide fibers and polypropylene fibers can all be produced by melt spinning. The technological process of the melt spinning method is mainly as follows: the fiber-forming polymer is heated and melted in the screw extruder to form a melt, and the melt is extruded from the spinneret hole by a metering pump to form a thin stream of melt, which is cooled and solidified Filaments are formed, oiled and wound, and finally drawn and attenuated to make fibers. [0003] The main process parameters of melt spinning are the flow rate of the polymer th...

AI Technical Summary

Problems solved by technology

Obviously, this method is extremely cumbersome and requires a lot of time, manpower and funds. It is very inefficient for factories and is not conducive to industrial production.

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