Water washing device for carbon fiber filament and method of water washing

Patent metadata

Field	Value
Publication number	US-12385164-B2
Application number	US-202217865929-A
Country	US
Kind code	B2
Filing date	Jul 15, 2022
Priority date	Jul 16, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A water washing device for carbon fiber filament and a method of water washing using the same are provided. The water washing device divides a temperature controller and the carbon fiber filament by disposing a division plate in a water washing tank; thus a temperature of washing water can be accurately controlled. Further, spray nozzle(s) can be controlled to enhance washing effect of the carbon fiber filament.

First claim

What is claimed is:

1. A water washing device for carbon fiber filament, comprising:
a plurality of water washing tanks, wherein the water washing tanks are disposed in series along a producing direction of the carbon fiber filament, and each of the water washing tanks comprises:
a tank, configured to accommodate washing water, wherein the tank has an end of accessing filament and an end of exporting filament, and the end of accessing filament has a water inlet and an overflow lip;
a division plate, configured to divide the tank into an upper portion and a lower portion, wherein the water inlet is disposed in the lower portion, and the overflow lip is disposed in the upper portion;
a plurality of driving rollers, disposed in a top region of the upper portion, wherein the driving rollers are configured to move the carbon fiber filament;
a plurality of filament guides, disposed in the upper portion and between the driving rollers, wherein the carbon fiber filament is moved above the filament guides;
at least one spray nozzle, disposed in the upper portion and between the end of accessing filament and the end of exporting filament, wherein the at least one spray nozzle is configured to spray water from underneath toward the carbon fiber filament;
a temperature controller, disposed in the lower portion, wherein the temperature controller is configured to control a temperature of the washing water;
a perforated plate, disposed at the end of exporting filament and connected to the division plate; and
a pump, connected to the tank and each of the at least one spray nozzle, wherein the pump is configured to pump the washing water to each of the at least one spray nozzle,
wherein the tank is configured to flow the washing water from the water inlet into the tank through the temperature controller and the perforated plate, and further flows into the upper portion.

2. The water washing device of claim 1 , wherein each of the water washing tank further comprises:
a thermometer, disposed in the upper portion and near the end of the accessing filament.

3. The water washing device of claim 1 , wherein each of the water washing tanks comprises 1 to 5 spray nozzle(s).

4. The water washing device of claim 1 , wherein a flowing direction of the washing water in the upper portion is contrary to the producing direction of the carbon fiber filament.

5. The water washing device of claim 1 , wherein the washing water flows from the overflow lip of one of the water washing tanks to the water inlet of another one of the water washing tanks, and the end of accessing filament of the one of the water washing tanks is connected in series to the end of exporting filament of the another one of the water washing tanks.

6. The water washing device of claim 1 , wherein a distance between each of the at least one spray nozzle and the carbon fiber filament is in a range of 2 cm to 5 cm.

7. The water washing device of claim 1 , wherein a water spray rate of the at least one spray nozzle is in a range of 50 L/hr to 100 L/hr.

8. The water washing device of claim 1 , wherein a spray pressure of the at least one spray nozzle is in a range of 1 kg/cm 2 to 2 kg/cm 2 .

9. The water washing device of claim 1 , wherein the pump is connected to the upper portion of the tank.

10. A method of water washing a carbon fiber filament, comprising: introducing the carbon fiber filament through the water washing device of claim 1 , wherein temperature of the water washing devices is gradually increasing along the producing direction of the carbon fiber filament.

11. A water washing device for carbon fiber filament, comprising:
a plurality of water washing tanks, wherein the water washing tanks are disposed in gradient, and each of the water washing tanks comprises:
a tank, configured to accommodate washing water, wherein the carbon fiber filament accesses the tank from an end of accessing filament and exports the tank through an end of exporting filament;
a division plate, configured to divide the tank into an upper portion and a lower portion, wherein a water inlet is disposed in the lower portion, and an overflow lip adjacent to the end of accessing filament is disposed in the upper portion;
a plurality of driving rollers, disposed in the upper portion and between the end of accessing filament and the end of exporting filament, wherein the driving rollers are configured to move the carbon fiber filament;
a plurality of spray nozzles, disposed in the upper portion and between the end of accessing filament and the end of exporting filament, wherein the plurality of spray nozzles are configured to spray water from underneath toward the carbon fiber filament;

at least one temperature controller, disposed in the lower portion, wherein the at least one temperature controller is configured to control a temperature of the washing water; and
a perforated plate, disposed at the end of exporting filament and connected to the division plate,
wherein the tank is configured to flow the washing water from the water inlet into the tank through the at least one temperature controller and the perforated plate, and further flow into the upper portion, and a flowing direction of the washing water in the upper portion is contrary to a producing direction of the carbon fiber filament.

12. The water washing device of claim 11 , wherein each of the water washing tank further comprises:
a plurality of filament guides, disposed in the upper portion and between the driving rollers, wherein the carbon fiber filament is moved above the filament guides.

13. The water washing device of claim 12 , wherein each of the water washing tanks comprises 3 to 5 filament guides.

14. The water washing device of claim 11 , wherein each of the water washing tank further comprises:
a pump, connected to upper portion of the tank and each of the spray nozzles, wherein the pump is disposed to pump the washing water to each of the spray nozzles.

15. The water washing device of claim 11 , wherein the perforated plate is configured to allow the washing water to flow from the lower portion into the upper portion.

16. The water washing device of claim 11 , wherein the at least one temperature controller controls a temperature of the washing water between 20° C. and 100° C.

17. The water washing device of claim 11 , wherein the washing water flows from the overflow lip of one of the water washing tanks to the water inlet of another one of the water washing tanks, and the end of accessing the filament of the one of the water washing tanks is connected in series to the end of exporting filament of the another one of the water washing tanks.

Assignees

• Formosa Plastics Corp

Inventors

• Chen Ching-Wen
• Tsai Kun-Yeh
• Hung Chia-Chi
• Chou Wen-Ju
• Hwang Long-Tyan

Classifications

• D01F6/18

  from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide · CPC title

• D10B2101/12

  Carbon; Pitch · CPC title

• D06B23/22

  for heating · CPC title

• D06B23/14

  Containers, e.g. vats · CPC title

• D06B23/02

  Rollers · CPC title