dimension precision
as for dimension precision, how to make your final decision when designing plastic structural, at first, as a professional designer, […]
they affect the shrinkage of the plastic material
yes! You are right, as for affecting the shrinkage of the plastic material, I want to add something, the wall thickness and shape of plastic part also affect it’s shrinkage. For example, the plastic part with a thin wall shrinks less.
about injection condition
when you change the injection conditions during the injection process, such as injection force, time, and temperature. They will directly affect the shrinkage of the plastic material. For example, at the higher injection pressure, plastic parts usually shrink less.
the shrinkage of the plastic material
as a new mold designer, the shrinkage of the plastic material must be understood well, not only each plastic material has an unique shrinkage rate, but also it may vary by it’s manufacturer, batch number, and water and volatile contents.
design a plastic part
As a new comer, today I finally have a chance to design a plastic part, now I want to share something I gained during design: […]
about mold design
Of course, after understanding product well, in mold designer side, he or she also allow to suggest changes, especially in the areas of fragile mold cores or thin ribs, not only to make the mold easier to build but also to extend the life of the mold and to improve its serviceability.
understand product well
As a professional mold designer, it is very important to understand product well. For example, where and how is the product to be used? Required fits with other products, finish, strength, location of gate, ejector, etc.
make sure your tolerance make sense
In order to make sure that the tolerances shown on the product drawing make sense and can be achieved. the mold designer must know molding characteristics of specified plastic well, […]
product designer and tolerance
Our product designers often make mistakes in assigning tolerance to the product that are not necessary for the function of product. The proper method is to give a relatively large general tolerance and tighten up dimensions only where it is necessary for the function of the product or where it is required in the assembly [...]
tolerance on the product drawing
Tolerances are probably the most important areas to be checked. When this project is quoted, the tolerance will be checked and question. Before designing, the final drawing released with complete tolerance should be required. because a large portion of the machining cost is directly related to the tolerance.