4 WAYS YOU CAN IMPROVE THE MANUFACTURABILITY OF YOUR PART FOR INJECTION MOLDING (PART2)
MAKE ROOM FOR DRAFT
Depending on the part design and material adding just a few degrees of taper can allow your part to leave its mold much more smoothly. This will also minimize scraping and friction between the finished product and the mold. This means that the surface of your part will remain undamaged, while the process itself moves along at a much quicker rate.
Draft can be very easily understood if you imagine an ice cube tray. When ice cubes are formed and you take them out of the freezer do you have to pry them out of their individual molds with a tool? No, because the part design for the ice cube tray has a certain amount of draft within it that allows the cubes to smoothly pop out when placed under a little bit of pressure.
CAREFULLY CHOOSE WALL THICKNESS
Beside primarily impacting the visual outcome and functionality of a part, wall thickness directly affects the manufacturing cycle time. Thicker walls utilize more material and extend the length of the molding/cooling cycle and drive up the cost. Also, be wary of wall thickness when working with plastics as thicker walls are weaker.
Designing with thick walls poses other issues as well. Having thick wall sections can lead to air being trapped and creating voids in your parts with can compromise their structural integrity. You can also see the cosmetic effects of thick walls as sink or other visual imperfections.
Injection molding has become a very popular process, but you won’t gain its full benefits unless the proper steps are taken to optimize its potential. Knowing how a mold works and what the necessities of part design will help you optimize your product.
There are many moving parts to creating an optimized part design. Without a strong background in plastics, it can seem overwhelming to create an effective product or component. Luckily, a skilled moulder will have the resources available to assist you in ensuring your design is optimized prior to beginning your mold build.
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