MINISTRY OF EDUCATION AND TRAINING
HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND
EDUCATION
FACULTY FOR HIGH QUALITY TRAINING

GRADUATION PROJECT

STUDY ON THE EFFECT OF INJECTION
MOLDING PARAMETERS ON THE WELD LINE
STRENGTH FOR THERMOPLASTIC COMPOSITE
MATERIALS
ADVISOR: Assoc. Prof. DO THANH TRUNG
STUDENT:NGUYEN TAN LOI

ID STUDENT:18143024

NGUYEN THAI BINH ID STUDENT:18143002
School year: 2018-2022
Major: Machine Manufacturing Technology

Ho Chi Minh City, July 2023

Graduation Project
Project
HCMC UNIVERSITY OF

SOCIALIST REPUBLIC OF

TECHNOLOGY AND EDUCATION

VIETNAM

FACULTY FOR HIGH QUALITY TRAINING

Independence – Liberty – Happiness

GRADUATION PROJECT TASKS
Advisor: Assoc. Prof. Do Thanh Trung
Students perform: Nguyen Thai Binh
Nguyen Tan Loi

ID: 18143002

Phone: 0983719600

ID: 18143024

Phone: 0377611637

1. Topic name:
STUDY ON THE EFFECT OF INJECTION MOLDING PARAMETERS ON THE
WELD LINE STRENGTH FOR THERMOPLASTIC COMPOSITE MATERIALS
2. Initial figures and documents:
- Injection molding process parameters.
- Injection mold.
3. Main contents of the project:
- Overview of plastic injection molding technology and its injection parameters.
- Conducting the tensile tests and hardness on various injection molding specimens
with different parameters.
- Analyzing the SEM images.
- Discussing the results.
4. Expected products
- Creating plastic injection molding samples using ABS and TPU materials.
- Analyzing the effects of mold temperature, plastic temperature, and injection pressure
on the tensile strength.
FACULTY FOR HIGH QUALITY TRAINING

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Graduation Project
Project
5. Project delivery date:
6. Date of submission of the project:
7. Presentation language:

The report:

English

 Vietnamese

Protection

English

 Vietnamese

presentation:
FACULTY
(Sign, specify fullname)

DEPARTMENT HEADS
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FACULTY FOR HIGH QUALITY TRAINING

ADVISOR
(Sign, specify full name)

ii

Graduation Project
Project
HCMC UNIVERSITY OF
TECHNOLOGY AND EDUCATION
FACULTY FOR HIGH QUALITY TRAINING

SOCIALIST REPUBLIC OF
VIETNAM
Independence – Liberty – Happiness

GRADUATION PROJECT COMMENT SHEET (For Advisor)
Full name of students

Nguyen Thai Binh

Student ID

18143002

Council:

12

Nguyen Tan Loi

Student ID

18143024

Council:

12

Topic name: STUDY ON THE EFFECT OF INJECTION MOLDING PARAMETERS ON THE
WELD LINE STRENGTH FOR THERMOPLASTIC COMPOSITE MATERIALS
Major: Machine Manufacturing Technology
Full name of instructor:
...

...
ia-Hsiang Hsu, Molding Simulation:
Theory and Practice, Hnser Publisher, Munich, 2018.
3. Phạm Sơn Minh, Trần Minh Thế Uyên – Thiết kế chế tạo khuôn ép nhựa, NXB Đại
học Quốc gia Tp.HCM, 2015
4. Vũ Hoài Ân, Thiết kế khuôn cho sản phẩm nhựa, Viện máy và dụng cụ công nghiệp,
1994.
5. Phan Thế Nhân, Luận án Tiến sĩ “Nghiên cứu ảnh hưởng của nhiệt độ khuôn đến độ
điền đầy của vật liệu composite trong quy trình phun ép, Trường Đại học Sư phạm
Kỹ thuật Tp.HCM, năm 2022.
6. ASTM International, The World Trade Organization Technical Barriers to Trade
(TBT) Committee, Standard Test Method for Tensile Properties of Plastics, 2015,
pp. 1-17.
7. https://www.injectionmould.org/2019/06/01/weld-lines/
8. Ming-Chang Jeng, Shia-Chung Chen, Pham Son Minh, Jen-An Chang, Chia-shen
Chung, Rapid mold temperature control in injection molding by using steam
heating, International Communications in Heat and Mass Transfer, Volume 37,
Issue 9, November 2010, Pages 1295-1304.
9. Ming-Ching Yu, Wen-Bin Young, Pe-Ming Hsu, Micro-injection molding with the
infrared assisted mold heating system, Materials Science and Engineering: A,
Volumes 460–461, 15 July 2007, Pages 288-295.
10. Phạm Sơn Minh, Đỗ Thành Trung, Nguyễn Hộ và Phan Thế Nhân, Đánh giá quá
trình gia nhiệt cho lòng khuôn hình chữ nhật bằng phương pháp phun khí nóng từ
bên ngoài, Tạp chí Khoa học Giáo dục Kỹ thuật, Số 33, 2015, trang 9- 15.
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11. Đỗ Thành Trung, Phạm Sơn Minh, Phan Thế Nhân và Phùng Huy Dũng, Gia nhiệt
cục bộ cho lòng khuôn phun ép nhựa bằng khí nóng, Tạp chí Cơ khí Việt Nam, Số
4, 2015, trang 15-20.
12. Pham Son Minh, Tran Minh The Uyen, Thanh Trung Do, Van Thuc Nguyen, Van
Thanh Tien Nguyen, Enhancing the Fatigue Strength of the Weld Line in Advanced
Polymer Injection Molding: Gas-Assisted Mold Temperature Control for
Thermoplastic Polyurethane (TPU) Composites, Polymers 2023, 15(11), 2440
https://doi.org/10.3390/polym15112440.
13. Trần Minh Thế Uyên, Luận án Tiến sĩ “Nghiên cứu ảnh hưởng của gia nhiệt khuôn
phun ép bằng khí nóng đến độ bền sản phẩm nhựa dạng thành mỏng, Trường Đại
học Sư phạm Kỹ thuật Tp.HCM, năm 2020.
14. https://omnexus.specialchem.com/polymer-properties/properties/hardness-shored#Definition
15. https://omnexus.specialchem.com/ion-guide/acrylonitrile-butadiene-styreneabs-plastic.

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APPENDIX

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