For some plastic parts, other causes lead to warping or twisting
Different gate position and cooling time often build stresses, then lead to warping or twisting, but also we find other causes. in mold design, […]
During molding process, your plastic parts will meet warpage problem
For an Experienced molding engineer, that is a common problem, but for a fresh molding engineer, maybe It is worth mentioning, at first, in almost every plastic part, there are different thickness, thick sections cool slower than thin sections, […]
Some plastic parts need textures and lettering
maybe there are some plastic products or products with plastic parts at hand, when looking carefully, you can find some of them have textures or lettering on their inner or external surface. […]
Some manufacturing details about textures and lettering
When we decide to make textures and lettering on the plastic parts, depth and draft should be considered, draft for texturing is somewhat dependant on the mold design and the specific mold texture. […]
Please don’t forget to add drafts when designing a plastic product
Today I check some mold designs from some Young mold designers, I find a common and Easily neglected problem—they often forget to add drafts in some areas, maybe they don’t realize it’s importance, […]
how to evaluate the stress concentration factor in a plastic part
Today we discuss how to evaluate the stress concentration factor in a plastic part, actually in last blog, you can find a small illustration, please look at it carefully. there is a Mathematical relationship between radius and thickness for the stress concentration factor. it means when R/T values lesss than 0.5, the stress concentration factor [...]
Plastic products need to be radiused at the sharp corner
There are many many sharp corners in every plastic product, what does a sharp corner mean? Sharp corners greatly increase the stress concentration during injection molding.it could lead to failure of plastic parts, especially for the high amount of stress concentration. So generally, as a mold or plastic produce designer, when he or she meet [...]
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 material additive processes lead fastest to moldings
the material additive processes lead fastest to moldings and are therefore the most promising. These also include new and further in RP. Examples of such techniques are laser sintering, […]
introduction to mold lifting
Safety must be a primary consideration of the mold designer. How can a mold, or any heavy mold part, handled safely? No person should repeatedly lift parts heavier than 20KG or any part which is awkward to handle, regardless of weight, without some mechanical assistance, such as a hoist. […]