Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


osu1087449857.pdf (3.23 MB)

ETD Abstract Container

Abstract Header

Processing studies in reactive in-mold coating for thermoplastic substrates

Zuyev, Konstantin Sergeevich
http://rave.ohiolink.edu/etdc/view?acc_num=osu1087449857

Abstract Details

2004, Doctor of Philosophy, Ohio State University, Industrial and Systems Engineering.
In-mold coating products have been used for many years to enhance the surface of reinforced plastics, providing a smooth, sealed surface used as a conductive or non-conductive primer for subsequent painting operations. Initially, the IMC process was successfully applied to the Sheet Molding Compound compression molded parts. Recently a new class of coating materials has been developed and applied to thermoplastic substrates. The potential benefits of using In-Mold Coating as a topcoat for thermoplastics are large due to the fact that painting is a very costly and non-environmentally friendly operation. However, the acceptance of IMC as a competitor to the traditional painting process will depend upon the ability of the former to deliver coated parts in short cycle times with the best possible surface quality and adhesion. The core of this research work is the development of an approach to solve cases of non-uniform heat transfer between thermoplastic and mold with emphasis on cycle time, uniformity of cure, and adhesion in the Injection Molding/In-Mold Coating process. Finite Difference Method is first applied to solve 1-dimensional heat conduction. The model is then expanded to solve 2-dimensional heat conduction. The results of the heat transfer analysis are used to predict IMC cure time, which is a major part of the Injection Molding/In-Molding Coating cycle time. Extensive experimental work has been conducted to understand how different processing conditions such as packing pressure, temperature, coating volume, and delay time between thermoplastic and coating injections affect adhesion and surface quality of the parts. Here, the Pilot Facility including 50-ton injection molding machine, in-mold coating high pressure pump, mold, temperature controllers, heaters, sensors, and data acquisition system is used to conduct experiments with three different thermoplastics: Acrylonitrile Butadiene Styrene, Polycarbonate Acrylonitrile Butadiene Styrene, and Polyethylene Terephthalate. Adhesion of the coating to the substrate has been evaluated using scratch test (ASTM D3359) and button pull test (ASTM D4541). From the results of these experiments we conclude that adhesion is independent of processing conditions. We also indicate that heat transfer between thermoplastic and mold plays an important role if one desires to achieve uniform coating cure and equal adhesion anywhere in the part.
Jose Castro (Advisor)
244 p.
In-Mold Coating

Recommended Citations

Citations

  • Zuyev, K. S. (2004). Processing studies in reactive in-mold coating for thermoplastic substrates [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1087449857

    APA Style (7th edition)

  • Zuyev, Konstantin. Processing studies in reactive in-mold coating for thermoplastic substrates. 2004. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1087449857.

    MLA Style (8th edition)

  • Zuyev, Konstantin. "Processing studies in reactive in-mold coating for thermoplastic substrates." Doctoral dissertation, Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1087449857

    Chicago Manual of Style (17th edition)

osu1087449857
3,123
© 2004, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.