Nebraska Community College Heeds PPE Call in Cororavirus Crisis
Molds 550 pieces of headgear for face shields in the same time it took to produce one on a 3D printer. College has donated 11,500 completed face shields for use throughout Nebraska and 800 to Columbus Community Hospital, a local facility.
The injection molding program at Central Community College (CCC) in Nebraska helped meet the demand for personal protective equipment during the COVID pandemic. In particular, there was a great need for headgear pieces for face shields to be produced at a much higher rate than 3D printing. Utilizing on-campus injection molding machines, program director Ben Wilshusen was able to produce 550 pieces of headgear in the same time it took to produce one on a 3D printer.
CCC partnered locally with Jimko Machine for the project as well as custom molder Majors Plastics of Omaha. Wilshusen produced the headgear pieces on two machines—a Toyo Si-55-6 (55 ton) and an Arburg Allrounder 370 E golden Electric (55 ton). Both presses were donated on consignment from the machine builders. The material used to make the headgear pieces was HIPS regrind donated by Majors Plastics. An aluminum MUD mold insert was utilized with the cavity machined by Jimko Machine. The waterline and ejector system was machined on campus by advanced manufacturing design technology coordinator Darin Skipton.
Once the headgear pieces were created, 100 were boxed along with shields, elastic bands and assembly instructions. CCC staffers and even a couple of student-athletes helped pack the boxes, which were then shipped to various health departments in Nebraska. CCC has donated 11,500 completed face shields for use throughout Nebraska and 800 to Columbus Community Hospital, a local facility.
Face shield head gear molded of HIPS by Nebraska Central Communnity College Program.
With the assistance of a National Science Foundation grand, CCC’s plastic injection molding program is in development and scheduled to launch in fall 2021.
One of the important process parameters to establish and record for any injection molded part is its injection or fill time. Research research reveals the limitations of popularly taught methods of establishing this critical parameter.
First find out if they are the result of trapped gas or a vacuum void. Then follow these steps to get rid of them.
Modifications to the common core pin can be a simple solution, but don’t expect all resins to behave the same. Gas assist is also worth a try.