A correct boss design is very important in every plastic part
Boss design is a common design in a plastic part, it is used for mating part or for attaching fasteners such as screws or accepting threaded inserts. […]
The wall thickness is very important for a plastic part
As an experienced industrial designer, especially for a mold designer, when he or she designs a plastic part, the wall thickness need to be considered carefully,On the premise of meeting the requirements of product use function and injection molding, the designers should know how to design a minimum wall thickness, because during injection molding process, [...]
please don’t forget ribs
hey! Every one, please don’t forget ribs, sometimes, in order to enhance the plastic part strength and stiffness, and it is impossible to increase the wall thickness of the part, what to do? Yes! ribs could help and also ribs could improve material flow conditions during molding.
the thickness of plastic part can help mold designer
sometimes, the thickness can help us to probably locate the welding mark, for example, in order to avoid leaving welding marks in the top areas. We should increase the thickness of the top areas to a reasonable value.
the homogeneous thickness around the part is very important
during the solidification and cooling process, uneven shrinkage is bad for plastic part, such as residual forces and defects and so on. So the homogeneous thickness around the part is very important.
about thermoplastic material
I want to say something about thermoplastic material when you meet thickness problem, actually thermoplastic materials are good for parts with a thin wall. The value we often use is from 1.5 mm to 4 mm. though it could be as thin as 0.6 – 0.9mm, or even 0.25 mm at time.
more details about the thickness of plastic part
before deciding a certain thickness, you need to balance something like economics, and part quality and strength, these contain the material type, part size, and molding conditions and so on.
how to design a reasonable rib in plastic part?
1) Ribs increase the bending stiffness of a part. Without ribs, the thickness has to be increased to increase the bending stiffness. Adding ribs increases the moment of inertia, which increases the bending stiffness. Bending stiffness = E (Young’s Modulus) x I (Moment of Inertia) […]