Plastic Industry Parts Design Geometry is one of the most important components of the design process. Not only does it affect aesthetics, it also affects the performance, strength, and durability of your parts. So if you're designing a plastic part, here are five key geometry tips that will help ensure its success:
1. Always define the design intent of the part features.
Make sure to clearly document your design intent so everyone involved in the project understands it.
Define the design requirements for a part, that is, the requirements that a product part must meet in order for it to function properly.
Define any constraints on how features are designed, for example, restrictions on the manufacturing process or materials used in production. Some constraints may be imposed by external forces beyond your control. For example, regulations imposed by security officials or material availability.
Make sure you understand all of these requirements and limitations before proceeding to design any features of your plastic part.
2. Establish a draft angle in the part.
Draft angles are used to increase the strength of a part, reduce stress, and make it easier to remove the part from the mold.
Draft angle is the angle at which a wall on part transitions to another surface. Draft angle is also known as undercut or negative draft angle.
3. Add ribs and gussets for added strength and durability.
Ribs and gussets are used to increase the strength and durability of plastic part designs. They can also be added for added stiffness. This is important for parts that need to be stiff enough to withstand the loads from their intended use. Rib and gusset placement must be carefully considered as they affect other aspects of the part design:
The thickness of the rib will determine the amount of material used in areas where the rib is not needed or has been removed.
If you plan to print your part on a 3D printer, ribs should not be placed on areas where internal supports will be printed as this may cause problems with print accuracy if this causes problems removing the supports later
4. The wall thickness of the whole part should be uniform.
One of the most important rules when designing a plastic part is to ensure that its wall thickness is uniform throughout. This can be very difficult if you're trying to model something with complex proportions, such as complex shapes or irregular surfaces. However, all parts must have the same wall thickness so that they do not crack during production or use.
The recommended minimum wall thickness for any given material is determined by three factors: 1) the required strength of the part; 2) the amount of plastic required for production; 3) the length/width ratio of your design (i.e., does it have a surface area that is much greater depth/thickness).