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Scientific Processing and Scientific Molding - What is the difference?

The term ‘Scientific Molding’ was coined and promoted by a two pioneers in the field of injection molding, John Bozzelli and Rod Groleau. Their principles are widely used today and are industry standards. Scientific Molding deals with the actual plastic that enters the mold during the molding operation at the molding press. The studies such as the Rheology Study or the Pressure Drop Study all constitute to the practice of Scientific Molding. Scientific Molding is understanding the science behind molding. Having a ’decoupled process’ (registered service mark of RJG) is not scientific molding or performing a Rheology Curve is not Scientific Molding. Applying these techniques is Scientific Molding.

But what has happened to the plastic before it enters the feed throat? Was it in a controlled environment? What is happening to the molecules of the plastic in the molded product when it is ejected out of the mold and is exposed to the environment? Are there any changes in part quality over time and if so why and what is affecting it? There are a lot of questions to be answered. One has to understand the journey of the pellet as it gets transformed to a molded part and then into its final service life.  The molding process is what happens in the mold with the aid of the molding machine but the process actually starts from when the pellet enters into the molding facility to when it leaves the facility as a molded product. Understanding this and applying this knowledge to produce consistent quality parts is what is Scientific Processing.

Suhas Kulkarni has done numerous studies on materials, their preconditioning (drying), post mold shrinkage studies and so on. Some of the results have been published at conferences. The final quality of the part that reaches the customer is the result of all the sub processes from the storage of the resin to the shipping of the product. 

 

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