Course IntroductionMicrocellular injection molding (also known as patented commercial process MuCell ®) is a processin which supercritical fluid (SCF) (N2 or CO2) is injected into the machine barrel. Then SCF andmolten polymer are mixed during the plasticizing and become a uniform single-phase fluid.Microcellular foams appear from the mixture of SCF and polymer melt during the injection phase asthe instability of thermodynamic states caused by sudden pressure drop. Molten polymerscontaining cells are shaped in the mold cavities and the desired molded products with micro scalecells are obtained. This process is without the packing stage in the regular injection moldingprocess so that the cycle time is reduced. In addition, foaming process improves the dimensionalstability and reduces the shrinkage and warpage problem on the molded part. Other benefits fromthis process include environmental friendliness, material /energy saving, lightweight and recyclableplastic products and so on.

The Recent Development and Process The Recent Development and Process Optimization of Optimization of MucellMucell ®® MoldingMolding

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Goals

• Understanding the recent development and application of microcellular injection molding .

• Understanding the principle of product design of microcellular injection molding and the common product defect and resolved solution.

• Knowing how CAE help for design and processing optimization of microcellular molded product.

Course Information

Date：Please refer to official website

Organizer ：CoreTech System

Contact ：mkt@moldex3d.com

Remark：Small class size of 8-10

Course Information

Date：Please refer to official website

Organizer ：CoreTech System

Contact ：mkt@moldex3d.com

Remark：Small class size of 8-10

Topics

Manufacturing challenge and green issue of plastic industry

Essentials and recent development in microcellular injection molding process

Optimization of microcellular injection molding process via CAE application

Case study - Cell quality control and application of counter pressure technique

Case study - High dimensional stability of injection molded product

Q & A

*The agenda is subject to changes.

Course Content

Although microcellular injection molding has so many advantages, the control of SCF andphysics of gas dissolved into molten polymer makes this technique very complex. How to

Participants• Business owners and managers

• Product/manufacturing engineer

• Mold maker and product designer

• Polymer processing engineer

• Plastics suppliers

• Persons who is interested in plastic manufacturing

effectively control and optimize the processingconditions are extremely important. Based on this,the course introduces the short history ofmicrocellular injection molding technique. Then theapplications in the market and the latestdevelopments of this technique are discussed.Finally, the CAE technology is introduced as apowerful tool in solving the complicated problem ina simple sense. The practical case studies arediscussed to investigate the cell size and celldistribution of the micro-foam molded product.

Dr. Lloyd Shiu

Current Position：Senior engineer and polymer specialist in Technical Research Division of CoreTech System Co., Ltd.

Education：Ph.D. in Chemical Engineering from Illinois Institute of Technology

Instructor

He was a research assistant of The Center of Excellence in Polymer Science and Engineeringat IIT. He has worked in the area of polymer rheology for many years, and is working onpolymer processing simulation for optical products and novel manufacturing technology, suchas micro injection molding and microcellular injection molding.

Cycle time comparison between microcellular and regular injection molding

Warpage of microcellular foam molded product

Microcellular foams in the product.(Source:http://green.autoblog.com)

Warpage of regular molded product