4 Design for Efficient Signing up with Can the parts interlock or clip together? Search for ways to sign up with parts without the use of screws, fasteners or adhesives. If you should utilize fasteners, here are a few tips: Keep the number, size and variation of fasteners to a minimum Usage standard fasteners as much as possible.
Stay away from screws that are too long or too brief, different washers, tapped holes, round heads and flatheads. 5 Lessen Reorientation of Parts During Assembly & Machining Parts must be developed so that a minimum of manual interaction is necessary during production and assembly. 6 Streamline Number of Manufacturing Operations/Processes The more intricate the procedure of making your item, is the more variables for mistake are presented.
Just consist of those operations that are vital to the function of the design. 7 Specify "Appropriate" Surface Ends up Unless it should be trade show grade, opt for function rather than flashy for your surface finish. BONUS: 4 KEY QUESTIONS ABOUT PLASTIC INJECTION MOLDING & DFM Jeff talked a good bit about plastic injection molding in the videos.
The hot plastic liquid is put into the mold, then rapidly cooled. The two halves are pulled apart and there's your part. If any feature in your part relocates a direction besides the pull of the mold, that will complicate the tooling and the tool will cost more.
They can get captured in the tool and cause damage. If the design element causing the undercut is absolutely required it's possible to navigate it by utilizing a slide, but that increases the price of the tool. Check it Out to eliminate the damaged by changing the design. The thick areas on plastic parts are designed that way for strength.
Sink is not good. It is an area of weakness in the part. Also, longer cycle times increase part cost, as the amount of press time to mold the part is increased. To address this problem, an engineer will thin a thick location out and strengthen it with ribs. Thin walls are not good either, however.
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