The surface finish is an important part of the product design, it defines the tone and atmosphere of the product. The part could be shared by more application by only changing the design of surface finish, such as providing same product with different color. The surface finish of the cavity area inside mold is a… Continue reading →

Here discuss injection molding mold design process, see principle of making a mold design. To concentrate the critical/important dimension instead of general/reference dimension. Use time more efficient and shorten the lead time. Most of the raw material has 2 direction shrinkage rates, and the rate was tested in a controlled setting and environment (see test… Continue reading →

This is one of the key to the injection-molding process, the injection mold forms the melt plastic into the desired shape, provides the surface texture, and determines the dimensions of the finished molded article. In facilitating mold cavity filling and cooling, the mold also influences the molding cycle and efficiency as well as the internal… Continue reading →

Here discuss some common mold accessories that being implemented in mold design.

Positioning is a design concept; it helps to maintain and ensure the interaction between the elements of injection molding process by reserving specific area of “mold part” or providing particular design to control alignment inside and outside of mold (see Pic.-1). The purpose of Positioning includes: The colors of different mold parts stand for: Red:… Continue reading →

In most cases, the molding process operates at the environment where technician also works at, it is normal environment we are living at which is full of air. Within the molding cycle, the mold cavity area is full of air when the mold closes/before the step injection (melt plastic fills the cavity area) starts. To… Continue reading →

Insert is a design concept. By replacing specific area in the mold with different design steel to achieve particular target. An insert inside mold could be considered as an additional/removable part. The purpose of insert including: Despite the advantage mentioned above, we shall consider the cost as well. Generally, the manufacturing cost of a mold… Continue reading →

According to principles of plastic part design in post B-1~B-4 and mold concept, designers could make feasible/ producible part and mold accordingly. However, customers nowadays have more and higher requirements regarding products, they want more fashion/ personalize/ complicated designs. While part with more complicated design (aka Undercut), mold design needs more complicated mechanisms to fulfill the same…. Continue reading →

According to principles of plastic part design in post B-1~B-4 and mold concept, designers could make feasible/ producible part and mold accordingly. However, customers nowadays have more and higher requirements regarding products, they want more fashion/ personalize/ complicated designs. While part with more complicated design (aka Undercut), mold design needs more complicated mechanisms to fulfill the same…. Continue reading →

According to principles of plastic part design in post B-1~B-4 and mold concept, designers could make feasible/ producible part and mold accordingly. However, customers nowadays have more and higher requirements regarding products, they want more fashion/ personalize/ complicated designs. While part with more complicated design (aka Undercut), mold design needs more complicated mechanisms to fulfill… Continue reading →

Previously, we discussed Runner which is a system (path) of mold. It let plastic material flow travel from outside of mold into cavity area. In most cases, Gate located at the end of Runner, it is an entrance for material flow into cavity area. See concept in Pic.-1. Note: Red: Runner system, Orange: location ring (a… Continue reading →

Runner is a system (path) of mold for plastic material flow travel from outside of mold into cavity area, see concept in pic.-illustration of mold. Here discuss 3 runner systems Generally, Cold runner could be divided into areas below, see detail in pic.-illustration of Cold runner type-1 Some parts need many even distributed Gates to… Continue reading →