CN-122013328-A - Extrusion equipment for producing modified polyphenylene sulfide fiber

CN122013328ACN 122013328 ACN122013328 ACN 122013328ACN-122013328-A

Abstract

The invention discloses extrusion equipment for producing modified polyphenylene sulfide fibers, which relates to the field of extrusion equipment and comprises an extruder and two feeding boxes, wherein the two feeding boxes are connected with a feeding pipe, the feeding pipe is connected to the extruder, a stirring motor is arranged on the feeding box, a stirring shaft is arranged on an output shaft of the stirring motor, a plurality of stirring frames positioned in the feeding boxes are arranged on the stirring shaft, and a preheating feed box is arranged on the feeding boxes. In the invention, the raw materials are preliminarily melted into the melt through premelting, so that stable melt feeding can be realized, the fluctuation of solid particle feeding is eliminated, impurities can be trapped in a low-temperature premelting state with higher melt viscosity through filtering of the preheating plate in the premelting stage, the yield is improved, the impurities are cleaned without stopping through switching of double feed hoppers, the non-production time is reduced, the cleaning and feeding switching of the impurities without stopping can be realized, and the continuous production is ensured.

Inventors

LIU JU
YANG JUN
LI YARU
DENG DEYUAN
YIN XIANJUN
YANG XUBIN

Assignees

四川安费尔高分子材料科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. The extrusion equipment for producing the modified polyphenylene sulfide fibers is characterized by comprising an extruder and two feeding boxes, wherein the two feeding boxes are connected with a feeding pipe, the feeding pipe is connected to the extruder, a stirring motor is arranged on the feeding boxes, a stirring shaft is arranged on an output shaft of the stirring motor, and a plurality of stirring frames positioned in the feeding boxes are arranged on the stirring shaft; the feeding box is provided with a preheating box, a multistage premelting device is arranged in the preheating box and used for preheating and premelting raw materials, the multistage premelting device comprises a premelting cylinder, the premelting cylinder is movably arranged in the preheating box, the bottom side of the premelting cylinder is movably provided with a terminal melting plate, a plurality of grading premelting plates are arranged in the premelting cylinder, the bottom side of the preheating box is provided with a discharging cylinder, and the premelting cylinder is inserted in the discharging cylinder; The feeding device comprises a feeding pipe, a feeding barrel, a discharging switching device, two movable sealing plates and a movable sealing plate, wherein the feeding pipe is arranged on the feeding pipe, the discharging switching device is arranged on the feeding pipe, the two feeding boxes are connected to the discharging switching device, the discharging switching device is used for switching the two feeding boxes, the discharging switching device comprises a switching feeding pipe, the switching feeding pipe is arranged on the feeding pipe, the two discharging barrels are connected to the switching feeding pipe, two positioning sealing plates are arranged in the switching feeding pipe, the two movable sealing plates are movably arranged in the switching feeding pipe, and the movable sealing plates move downwards to be matched with the positioning sealing plates so as to seal one side of the switching feeding pipe.
2. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 1, wherein the multistage premelting device further comprises two synchronous sealing plates, two limiting rods are movably mounted on the two synchronous sealing plates, the limiting rods are mounted on the inner wall of the preheating bin, and the two synchronous sealing plates are mutually close to each other and used for sealing the feeding bin; and one end of the limiting rod is provided with a push-back spring, and the push-back spring is arranged on the inner wall of the synchronous sealing plate.
3. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 2, wherein sinking seats are arranged on the inner walls of the two sides of the preheating bin, sinking sliding blocks are arranged on the two sides of the premelting cylinder, and the two sinking sliding blocks are respectively and slidably arranged in the two sinking seats; And a supporting spring is arranged on the inner wall of the sinking seat, and the supporting spring is arranged on the sinking sliding block.
4. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 3, wherein one side of each of the two sinking seats is rotatably provided with a mounting shaft, and each of the two mounting shafts is provided with a V-shaped push rod; the two synchronous sealing plates are provided with a closed pushing frame, the two V-shaped pushing rods are provided with a linkage shaft, and the two linkage shafts are respectively and movably arranged in the two closed pushing frames; And one side of each sinking slide block is provided with a pressing shaft, and the sinking slide blocks drive the pressing shafts to move downwards and are used for extruding the V-shaped push rod to rotate.
5. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 4, wherein the bottom end of the stirring shaft extends into the premelting cylinder, a plurality of discharging rotating rods for pushing raw materials are arranged on the stirring shaft, and the plurality of discharging rotating rods are all located in the premelting cylinder.
6. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 5, wherein the discharging switching device further comprises a rotary switching frame, wherein an intermediate support rod is arranged on the switching feeding pipe, and the rotary switching frame is rotatably arranged on the intermediate support rod; the rotating switching frame is provided with two switching shafts, the movable sealing plates are provided with lifting frames, and the two switching shafts are respectively and movably arranged in the two lifting frames.
7. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 6, wherein driving press rods are movably installed in the two preheating bins, the two driving press rods are respectively installed on the two synchronous sealing plates, and driving press shafts are installed on the driving press rods; Install two mounting brackets on the switching inlet pipe, two all install the switch on the mounting bracket, two the switch respectively with two premelt section of thick bamboo and two agitator motor electric connection.
8. The extrusion equipment for producing the modified polyphenylene sulfide fiber according to claim 1, further comprising an auxiliary discharging device, wherein the auxiliary discharging device is installed on the multistage premelting device, and the auxiliary discharging device is used for assisting the multistage premelting device to discharge; The auxiliary discharging device comprises two rotating scrapers, the rotating scrapers are rotatably arranged at the bottom end of the stirring shaft, and the rotating scrapers rotate to scrape and discharge the bottom side of the terminal melting plate.
9. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 8, wherein two lifting sliding grooves are formed in the bottom side of the premelting cylinder, lifting sliding rods are slidably installed in the two lifting sliding grooves, knocking plates are installed on two sides of the terminal melting plate, and the two lifting sliding rods are respectively installed on the two knocking plates; the inner wall of the lifting sliding chute is provided with a push-down spring, and the push-down spring is arranged on the lifting sliding rod.
10. The extrusion equipment for producing modified polyphenylene sulfide fibers according to claim 9, wherein an extrusion arc-shaped seat is installed on the bottom side of the terminal melting plate, and the rotating scraper extrudes the extrusion arc-shaped seat to move so as to drive the terminal melting plate to move upwards.

Description

Extrusion equipment for producing modified polyphenylene sulfide fiber Technical Field The invention relates to the technical field of extrusion equipment, in particular to extrusion equipment for producing modified polyphenylene sulfide fibers. Background The modified PPS fiber is a high-performance fiber material prepared by carrying out structural optimization or performance enhancement on PPS resin by a chemical or physical method, and has the core aim of improving the limitation of the PPS fiber in specific application scenes, such as improving the dyeability, the moisture absorption rate, the oxidation resistance or the mechanical property and the like on the basis of retaining the original high-temperature resistance, the chemical corrosion resistance, the flame retardance and the like of the PPS. The raw materials of the modified polyphenylene sulfide are mixed and dried and then are sent into a screw extruder, the extruder melts the solid modified PPS raw materials into uniform melt through the rotary shearing of a screw and the heating of a machine barrel, and the melt is continuously and stably conveyed to a spinning component to finally prepare the modified polyphenylene sulfide fiber. Further, PPS fibers are mainly produced by ‌ melt spinning ‌, which is a process of heating and melting a solid polymer into a viscous state, extruding the viscous polymer through a spinneret orifice to form a thin stream, and then cooling, drawing, winding, etc., and an extruder is a key device for realizing the core step of ‌ melting, plasticizing, mixing, and transporting the melt ‌. It should be noted that during the production of the conventional extruder, when the conventional screw extruder is directly used for feeding, the modified PPS particles are easy to cause feeding fluctuation due to agglomeration and bridging, so that the extrusion amount is unstable, the deviation of the fiber linear density is large, impurities in the raw materials are difficult to be removed efficiently, mechanical impurities such as metal chips, glass fiber chips or thermo-oxidative aging impurities are possibly mixed in the raw materials in the production of the modified PPS fibers, such as cross-linked caking generated in the storage process, the filtering device of the conventional extruder is mostly arranged at a melt section, the impurities are easy to block a filter screen to cause shutdown, the raw materials stay at high temperature for a long time to cause deterioration, while the PPS has good heat resistance, but is thermally degraded above the melting temperature for a long time, so that the molecular weight is reduced, the mechanical properties of the fibers are deteriorated, and in addition, once the impurities are blocked, shutdown, disassembly and cleaning are needed in the conventional single-channel feeding system, so that the production efficiency is reduced. Disclosure of Invention The invention aims to provide extrusion equipment for producing modified polyphenylene sulfide fibers, which solves the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: The extrusion equipment for producing the modified polyphenylene sulfide fibers comprises an extruder and two feeding boxes, wherein two feeding boxes are connected with a feeding pipe, the feeding pipe is connected to the extruder, a stirring motor is arranged on each feeding box, a stirring shaft is arranged on an output shaft of each stirring motor, and a plurality of stirring frames positioned in each feeding box are arranged on each stirring shaft; the feeding box is provided with a preheating box, a multistage premelting device is arranged in the preheating box and used for preheating and premelting raw materials, the multistage premelting device comprises a premelting cylinder, the premelting cylinder is movably arranged in the preheating box, the bottom side of the premelting cylinder is movably provided with a terminal melting plate, a plurality of grading premelting plates are arranged in the premelting cylinder, the bottom side of the preheating box is provided with a discharging cylinder, and the premelting cylinder is inserted in the discharging cylinder; The feeding device comprises a feeding pipe, a feeding barrel, a discharging switching device, two movable sealing plates and a movable sealing plate, wherein the feeding pipe is arranged on the feeding pipe, the discharging switching device is arranged on the feeding pipe, the two feeding boxes are connected to the discharging switching device, the discharging switching device is used for switching the two feeding boxes, the discharging switching device comprises a switching feeding pipe, the switching feeding pipe is arranged on the feeding pipe, the two discharging barrels are connected to the switching feeding pipe, two positioning sealing plates are arranged in the switching feeding pipe, the two movable s