In injection molding process, ejector marks is a concave or a convex on the surface. Samples are stick in the mold under force of ejector system, it will create holes on products. Cause of ejector mark. + Sample doesn’t have a draft angle at boss, rib. It is difficult to push sample out of the […]
Plastic molding
Parting lock in plastics injection mold
Parting lock in plastics injection mold is an equipment that use to fix cavity plate and core plate when mold open. It creates the friction force to help cavity plate open more slowly. There are two types of parting lock. I. Parting lock in plastics injection mold with mechanism. 1. Nylon parting lock. + Allows adjustment […]
plastics injection mold design process
Before starting mold design process, designer must complete many questions about all the requirements which must be filled be the product. This is typical of question: 1. Question from the customer. + How can the product be made? + Is the product expected to have long time? + How many times does product be reused? […]
Mold material for plastics injection
In this lesson I will show how to choose the mold material for plastics injection. As you know, injection mold mass production much so durability of the material is very important. If we choose material not good, we will lose much money for repair mold when mass production. I. Mold material for plastics injection must […]
Injection molding design construction slide core
Slide core injection molding solve undercut in the products. This post will explain construction and design of it. How does slide core work? I. Construction of slide core system. Two pictures below will explain construction of slide core system. 1. Product. 2. Cavity plate. 3. Slide locking block: It uses to assemble an angular pin […]
Weld line in injection molding cause troubleshooting
Weld line in injection molding is line where two or more flow molten plastics knit together. These lines occur usually around holes or obstructions and cause locally weak areas in the molded part. Weld line are formed whenever melt fronts separate and recombine at some downstream location. It is formed when parts have multiple gates, […]