Unlock instant, AI-driven research and patent intelligence for your innovation.

Melt-spinning spinneret device and use method thereof

A technology of melt spinning and spinneret, which is applied in the direction of melt spinning, spinneret assemblies, textiles and papermaking, etc. It can solve the problems of high broken filament rate, poor quality of precursor filament, and large difference in fiber precursor diameter, etc. problem, to achieve the effect of ensuring uniformity, improving quality and good controllability

Active Publication Date: 2018-07-10
湖南东映碳材料科技股份有限公司
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over the years, although my country has achieved certain research results in this field, the design, processing and manufacturing capabilities of the spinneret for spinning high-precision, ultra-microporous and heat-sensitive materials are relatively weak.
In the process of melt spinning, especially high-temperature spinning, since one side of the spinneret is in contact with the outside world, heat exchange occurs continuously with the outside world, resulting in a large temperature gradient on the surface of the spinneret plate, so that the nozzles flowing through different positions The viscosity of the heat-sensitive material in the hole is inconsistent, resulting in a large difference in the diameter of the obtained fiber precursors, a high rate of broken filaments, resulting in poor quality of the precursors, which cannot meet actual needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Melt-spinning spinneret device and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The spinneret area 1 of the circular spinneret is in the form of a concentric ring, evenly distributed on the outer circumference of the circular spinneret, and is divided into four by grooves, and the spinneret area is composed of a plurality of arranged spinneret 4 Composition, the outer groove of each spinneret hole area is the heating compensation area, the groove of the heating compensation area is passed into the circulation heat transfer oil or filled with the heater, the groove is provided with the heat transfer oil inlet and outlet or the heater wire inlet and outlet 5, spray The hole area 1 and the heating compensation area 2 are completely separated by a hard sealing surface 3 .

[0016] The heat-sensitive naphthalene-based synthetic mesophase pitch with a softening point of 280° C. is melt-spun by using the melt-spinning spinneret designed in the present invention. Connect the spinneret to the spinning box, and after the temperature of the spinning box reach...

Embodiment 2

[0018] The heat-sensitive petroleum-based mesophase pitch with a softening point of 295° C. is melt-spun by using the melt-spinning spinneret designed in the present invention. Connect the spinneret to the spinning box, and after the temperature of the spinning box reaches the set temperature of 345°C and keep it warm for 2 hours, turn on the high-temperature circulating heat transfer oil, the flow rate of the heat transfer oil is 10L / min, and the temperature is 345°C, test the spinneret hole area through the far-infrared temperature, and start spinning when the temperature of the spinneret plate surface reaches 345±1°C. The mesophase pitch-based carbon fiber comes out of the spinneret, and after oiling, bundling, drawing, and winding, continuous high-quality mesophase pitch-based carbon fiber precursors can be obtained. Using the above-mentioned spinneret to carry out the melt spinning of the mesophase pitch, the broken filament rate can be controlled at 0.15%, and the diamet...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a melt-spinning spinneret device and a use method thereof. A spinneret comprises a screw area, a heating compensation area, a sealing surface area and a spinneret hole area, wherein the screw area is located in the center; the spinneret hole area of the round spinneret is averagely divided into four pieces; a groove is formed in the periphery of each piece of spinneret holearea, circulating heat conduction oil flows in the groove or the groove is filled with a heater, and the groove is provided with a heat conduction oil in-out port or a heater wire in-out port; the spinneret hole area and the heating compensation area are completely separated by the hard sealing surface area. In the melt-spinning process, the spinneret is subjected to heat transfer mainly by a spinning box, and the circulating heat conduction oil or the heater provides a small amount of heat compensation; temperature uniformity of the spinneret hole area can be realized, fiber diameter difference is reduced, and quality of precursor fiber is improved.

Description

technical field [0001] The invention relates to the field of melt spinning production equipment, in particular to a heat-sensitive material melt spinning spinneret device and a use method thereof. technical background [0002] The textile industry in China is a highly labor-intensive and foreign-dependent industry. my country is the world's largest producer and exporter of textiles and clothing. The continuous and stable growth of textile and clothing exports is crucial to ensuring my country's foreign exchange reserves, balance of payments, and The stability of RMB exchange rate, social employment and the sustainable development of the textile industry are very important, but many key equipment in the textile industry are still heavily dependent on foreign countries, especially the design and processing of spinnerets with special structures and ultra-micro holes are completely dependent on imports. Through years of technology accumulation and development, some developed coun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D01D4/02D01D5/08
CPCD01D4/02D01D5/08
Inventor 刘金水李保六张仕杰谭弘瑞易鑫
Owner 湖南东映碳材料科技股份有限公司