다이 설계에 따른 2-루멘 카테터 튜빙 압출의 비등온 해석

유준종; 조한수; 류민영; Joon Jong Yoo; Han Su Cho; Min-Young Lyu

Polymer(Korea), Vol.43, No.6, 889-898, November, 2019

DOI10.7317/pk.2019.43.6.889 Export Citation

다이 설계에 따른 2-루멘 카테터 튜빙 압출의 비등온 해석

Non-isothermal Simulation of a Two-lumen Catheter Tubing Extrusion for a Die Design

유준종, 조한수, 류민영^†

서울과학기술대학교 기계시스템디자인공학과

Joon Jong Yoo, Han Su Cho, and Min-Young Lyu^†

Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea

E-mail:

초록

카테터 튜빙은 압출공정으로 제작된다. 본 연구에서는 카테터 튜빙 제작에 사용되는 두 형태의 압출다이에 대해서 비등온 해석으로 비교하였다. 해석에 사용된 다이는 스트레이트 다이(straight die)와 크로스헤드 다이(crosshead die)이며, 스트레이트 다이는 압출기와 동일한 방향으로 장착되고 크로스헤드 다이는 압출기와 수직으로 장착된다. 두 다이에서 수지가 흐르는 유동통로에 대해서 분석하였다. 그리고 컴퓨터 해석을 통하여 두 종류의 다이에서 압력분포, 속도분포, 온도분포, 그리고 전단응력분포 등을 비교 분석하였다. 이러한 분석을 통해 내부 구조가 다른 두 다이에서 흐름과 온도의 안정성을 검토하였고 두 다이에 적절한 압출기에 대해서도 논의하였다. 다이내 수지의 원활한 유동측면에는 스트레이트 다이가 유리하고, 카테터 튜빙의 품질에 영향을 주는 다이 내 전단응력 발생 측면에서는 크로스헤드 다이가 유리하게 나타났다.

Catheter tubing is manufactured by an extrusion process. In this study, two types of extrusion dies that were used in catheter tubing extrusion were compared through non-isothermal computer simulation. The two types of dies were a straight die and a crosshead die. The straight die is attached to the extruder in the same line while the crosshead die is attached to the extruder at a right angle. The pressure distribution, velocity distribution, temperature distribution, and shear stress distribution in the two types of dies were analyzed and compared through computer simulation. Flow characteristics and temperature stabilities were examined and subsequently the adequacy of extruders for the two dies was discussed. The straight die had the advantage of a smooth and balanced flow, while the crosshead die had the advantage of a low shear stress generation that influenced the tubing quality.

Keywords:non-isothermal simulation;catheter tubing;extrusion die;straight die;crosshead die

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[4] Jin GB, Wang MJ, Zhao DY, Tian HQ, Jin YF, J. Mater. Process. Technol., 214, 50 (2014)

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[8] Rosen SL, Fundamental Principles of Polymeric Materials, Wiley, New York, 1993.

[9] Maillefer CE, U.S. Patent 3358327 (1967).

[10] Cunha SM, Cunha AG, Covas JA, Material Forming, Springer, New York, 2009.

[11] Park SY, Lyu MY, Macromol. Res., 26(8), 744 (2018)

[12] Griffith RM, Ind. Eng. Chem. Fundam., 1, 180 (1962)

[13] Tadmor Z, Broyer E, Gutfinger C, Polym. Eng. Sci., 14, 660 (1974)

[14] Han CD, Lee KY, Wheeler NC, Polym. Eng. Sci., 31, 818 (1991)

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[17] Urraca R, Espinoza AP, Adv. Manuf., 90, 2377 (2017)

[18] Dryden J, Acta Mech., 213, 269 (2011)

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[23] Lee WS, Ho HY, Polym. Eng. Sci., 40(5), 1085 (2000)

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[25] Yang GJ, Huang XC, Shen CY, Chen JB, Int. Polym. Process., 20(4), 336 (2005)

[26] Yilmaz O, Kısasoz E, Guner FS, Nart C, Kirkkopru K, Fiber Polym., 15, 84 (2014)

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[29] Luo XL, Tanner RI, Rheol. Acta, 26, 499 (1987)

[30] Zheng H, Yu W, Zhou C, Zhang H, Polym. Res., 13, 433 (2006)

[31] Chougale S, Rokade D, Bhattacharjee T, Pol H, Dhadwal R, Rheol. Acta, 57(6-7), 493 (2018)

[32] Wang Y, Polym. Res., 1, 175 (1994)

[33] Cho HS, Lyu MY, Polym. Korea, 42(2), 197 (2018)

[34] White JL, Principles of Polymer Engineering Rheology, Wiley, New York, 1990.

[35] Lyu MY, White JL, Int. Polym. Process., 10(4), 305 (1995)

[36] Macosko CW, Rheology: Principles, Measurement, and Applications, Wiley, New York, 1994.