C-8-Core Pulling

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

C-7-Lifter

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

C-6-Slider

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

C-5-Gate

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

C-4-Runner System

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

C-3-Cooling

Plastic is a material which very sensitive to temperature. Previously in properties of plastic, we have discussed important plastic characteristics which are related to the same. In a molding process, the temperature of plastic is well controlled from drying, transporting, melting (the injection molding machine heat the raw material up to process range), and of… Continue reading

C-1-Mold Concept

Injection molding process needs 3 major elements: raw material, injection molding machine, and mold. The process basically is that Injection molding machine melts raw material and inject it into mold, the mold opened, and we get the part. The purpose of mold is to form the melt plastic to the shape of part. It could… Continue reading

B-7-Plastic Properties

Here discuss 4 plastic characteristics which being mostly considered in product/process development, and how they affects through out the entire product life cycle. Note: Polymer manufacturer shall provide these information. 4 Temperature Each kind of plastic behaves differently when at 4 different temperature This information help designer to decide injection molding equipment/tool/plastic raw material. This… Continue reading

B-6-Common Plastic Issues

As any manufacturing process, defects can happen and negatively affect your product quality and productivity. To help you avoid this problem and create consistently great products, here discusses 35 different kinds of common plastic part issues (see table-1), their background and possible countermeasure. Before start identifying the issues, it is suggested to complete following actions… Continue reading

B-5-Different polymers and their characteristics

Resin and polymer are organic materials. The key difference between resin and polymer is that resins have small molecular weights, whereas polymers have large molecular weights. Polymers can be divided into 2 major categories: This site we discuss thermoplastic are commonly used in injection molding process. Each plastic model from different supplier can have different… Continue reading

B-4-Ribs

Rib is a kind of mechanical profile which is very common to be seen in plastic part design. Most of the time, the purpose of rib is to increase the strength of plastic part. See illustration of rib in Pic.-1 and 2. While rib is only necessary under the scenario when the area need more… Continue reading