Molding of Thin Sheets Using Impact Micro-injection Molding
-
S. C. Nian
Abstract
The micro-injection molding is used to fabricate ultra-thin polymeric components used in optoelectronics and biotechnology. Due to the extremely high flow resistance and fast heat transfer, ultra-thin parts is difficult to mold. In this study, a lab-made impact type micro-injection machine and a rapid heating/cooling system are used to perform the micro-injection molding. A mold with test-sheet cavities of thickness 100 lm and 200 lm are constructed. The molding capacity and the effects of processing conditions are systematically investigated. The processing conditions include the mold temperature, air pressure of accelerating cylinder, and air pressure of packing cylinder. The thicker parts have larger operation window. The high mold temperature reduces the area of short shot but induces more shrinkage and sink mark. The increase of air pressure in accelerating and packing cylinders can effectively reduce shrinkage.
References
1 Heckele, M., Schomburg, K.: J. Micromech. Microeng. 14, p. R 1 (2004)10.1088/0960-1317/14/3/R01Search in Google Scholar
2 Kukla, C., Loibl, H., Detter, H.: Kunststoffe 9, p. 1331 (1998)Search in Google Scholar
3 Despa, M. S., Kelly, K. W., Collier, J. R.: Microsyst. Technol. 6, p. 60 (1999)10.1007/s005420050176Search in Google Scholar
4 Fasset, J.: Plast. Eng. 12, p. 35 (1995)10.1007/BF03309740Search in Google Scholar
5 Yang, S. Y., Nian, S. C., Sun, I. C.: Int. Polym. Proc. 4, p. 355 (2002)Search in Google Scholar
6 Tadmor, Z., Gogos, C. G.: Principles of Polymer Processing. Wiley, New York (1979)Search in Google Scholar
7 Eberle, H.: Kunststoffe 9, p. 1344 (1998)Search in Google Scholar
8 Yao, D., Chen, M., Kim, B.: SPE ANTEC Techn. Papers 59, p. 704 (2001)Search in Google Scholar
9 Oda, K., White, J. L., Clark, E. S.: Polym. Eng. Sci. 16, p. 585 (1976)10.1002/pen.760160811Search in Google Scholar
10 White, J. L., Dee, H. B.: Polym. Eng. Sci. 14, p. 212 (1974)10.1002/pen.760140310Search in Google Scholar
11 Hasegawa, S., Yokoi, H., Murata, Y.: Paper presented at the Polymer Processing Society (PPS) Meeting, Athens (2003)Search in Google Scholar
12 White, J. L.: Polym. Eng. Sci. 15, p. 44 (1975)10.1002/pen.760150108Search in Google Scholar
13 Yang, S. Y., Liou, S. J., Liou, W. N.: Adv. Polym. Technol. 16, p. 175 (1997)10.1002/(SICI)1098-2329(199723)16:3<175::AID-ADV2>3.0.CO;2-QSearch in Google Scholar
14 Sato, M., Yokoi, H.: IEEE Trans. Adv. Pack. 23, p. 729 (2000)10.1109/6040.883765Search in Google Scholar
15 Yokoi, H., Masuda, N., Mitsuhata, H.: J. Mater. Process. Tech. 130–131, p. 328 (2002)10.1016/S0924-0136(02)00742-2Search in Google Scholar
© 2005 Hanser Publishers, Munich
Articles in the same Issue
- Contents
- Regular Contributed Articles
- An Improvement on Design of Sheet Extrusion Dies
- Organic-Inorganic Hybrid Material Synthesis by on Line Coupling Twin Screw Extruder with a Microwave Oven
- Water Penetration Stability in Water Assisted Injection Molded Symmetric Ribs
- A New Plasticating Model for Amorphous and Semi-crystalline Polymers in Single Screw Extruders
- Simultaneous Biaxial Stretching of Polypropylene Resins of Varying Tacticity
- Optimization of a Flat Die Including Elongational Viscosity Effects
- Experimental Study on Factors Influencing Throughput Rate and Process of Polymer-Mineral Filler Mixing in a Twin Screw Extruder
- 3D Finite Element Simulation of Processing of Generalized Newtonian Fluids in Counter-rotating and Tangential TSE and Die Combination
- Simulation of Heat Transfer in Laser Transmission Welding
- Influence of Power Law and Isothermal Simplification on the Accuracy in Single Screw Extrusion
- Melt Intercalation in Montmorillonite/Polystyrene Nanocomposites
- Experimental Investigation of the Effect of the Bubble Cone on the Cooling Jets used in the Blown Film Manufacturing Process
- Molding of Thin Sheets Using Impact Micro-injection Molding
- Rapid communications
- Ultrasonic Vibration Hot Embossing
- PPS news
- PPS news
- Seikei-kakou abstracts
- Seikei-kakou abstracts
Articles in the same Issue
- Contents
- Regular Contributed Articles
- An Improvement on Design of Sheet Extrusion Dies
- Organic-Inorganic Hybrid Material Synthesis by on Line Coupling Twin Screw Extruder with a Microwave Oven
- Water Penetration Stability in Water Assisted Injection Molded Symmetric Ribs
- A New Plasticating Model for Amorphous and Semi-crystalline Polymers in Single Screw Extruders
- Simultaneous Biaxial Stretching of Polypropylene Resins of Varying Tacticity
- Optimization of a Flat Die Including Elongational Viscosity Effects
- Experimental Study on Factors Influencing Throughput Rate and Process of Polymer-Mineral Filler Mixing in a Twin Screw Extruder
- 3D Finite Element Simulation of Processing of Generalized Newtonian Fluids in Counter-rotating and Tangential TSE and Die Combination
- Simulation of Heat Transfer in Laser Transmission Welding
- Influence of Power Law and Isothermal Simplification on the Accuracy in Single Screw Extrusion
- Melt Intercalation in Montmorillonite/Polystyrene Nanocomposites
- Experimental Investigation of the Effect of the Bubble Cone on the Cooling Jets used in the Blown Film Manufacturing Process
- Molding of Thin Sheets Using Impact Micro-injection Molding
- Rapid communications
- Ultrasonic Vibration Hot Embossing
- PPS news
- PPS news
- Seikei-kakou abstracts
- Seikei-kakou abstracts
