What is undercut in product design?
An undercut is a surface or face that can’t be formed by either the core or cavity in an injection mould tool. If the feature can’t be removed, or is critical to function in a certain way which forces us to retain the undercut, we may suggest moving the parting line of the product to the middle of the undercut.
What is an undercut in casting?
In molding, an undercut is an indentation or protrusion in a shape that will prevent its withdrawal from a one-piece mold. Undercuts on molded parts are features that prevent the part from being directly ejected from an injection molding machine.
What is undercut analysis?
You can use Undercut Analysis to find trapped areas in a model that cannot be ejected from the mold. These areas require a side core. When the main core and cavity are separated, the side core slides in a direction perpendicular to the motion of the main core and cavity. Undercut Analysis works only on solid bodies.
What is undercut in plastic?
Undercuts achieve complex plastic part designs for the injection molding process. An undercut is any indentation or protrusion that prohibits part ejection from a mold. It is a feature that the cavity and core cannot capture alone. It is die-locked which prevents the part from being ejected from the cavity.
What is undercut in plastic products?
Undercuts are those features in an injection-molded part that prevent its ejection from the mold. With straight-pull molds such as the ones used by Protolabs, these are any protrusions, holes, cavities, or recessed areas in the part where alignment is not perpendicular to the mold’s parting line.
What is the purpose of an undercut?
In fact, undercuts are so amazing in particular because of their functionality. Less hair means less maintenance, and less maintenance usually means an easier lifestyle and getting-ready process. It also takes weight off, so your hair can feel more lightweight than ever.
What is undercutting in lathe?
Undercutting: Undercutting is similar to a grooving operation when performed inside a hole. It is the process of boring a groove or a large hole at a fixed distance from the end of a hole. This is similar to the boring operation, except that a square nose parting is used.
What is external undercut?
Any recess or projection on the outer surface of a molded part that prevents its direct removal from its mold cavity.
How do you size an undercut?
A rule of thumb is that the undercut should be at least 1.5 threads long and the diameter should be at least 0.015 in (0.38 mm) smaller than the minor diameter of the thread. Strictly speaking the relief simply needs to be equal or slightly smaller than the minor diameter of the thread.
Why is the undercut so popular?
Undercut with shorter hair It is very popular because your hair will not fall in front of your eyes and it is very easy to style. Shorter hairstyles will look great when they have some texture and hold. Shorter hair also makes it easier to manage curly or wavy hair.
Can a plastic part be made with an undercut?
Cutting face and using the cavity to support the undercut. But today I’d describe a method of manufacturing plastic parts with side hole type undercuts. It is a popular and cost efficient technique that will reduce the need of a side core and manufacture the part (with undercut) by only a core and a cavity.
What does an undercut mean in a mold?
Simply, Undercut is something that prevents your luxury of easy removal of the plastic part from the mold. Now, in a simple mold, we have 2 parts. Core and Cavity. If the part has a feature that gets stacked inside the core or cavity after the molten plastic solidifies inside the mold, it is undercut.
What kind of material is best for undercuts?
It’s also important to note that side-actions work best with rigid materials like nylon, polycarbonate, acetal, and so on, especially for very deep features. Rubbery, flexible materials are not the best bet, as they might stick to the cylinder upon retraction and inadvertently get yanked out of the cavity.
Can a side hole be an undercut in a part?
Undercut can be a side hole, a rib, an hinge or any fancy feature of the part. Normally unnecessary undercuts are avoided. But to produce unavoidable undercut there are many ways. 1. Using side cores. (Which may increase the total cost to 15%) 2. Cutting face and using the cavity to support the undercut.