Chapter 17,Gate design overview

What is a gate? A gate is a small opening (or orifice) through which the polymer melt enters the cavity. Gate design for a particular application includes selection of the gate type, dimensions,and location. It is dictated by the part and mold design, the part...

Chapter 18, Gate types

Two categories of gates Gates can have a variety of configurations. They are classified into two categories- manually trimmed and automatically trimmed-based on the method of de-gating. Manually trimmed gates Manually trimmed gates are those that require an operator...

Chapter 19, Gate Design Rules

Essentials of a well-designed gate A properly designed gate will deliver a rapid, uniform, and preferably uni-directional mold filling pattern with a proper gate freeze-off time. Gate location The gate location should be at the thickest area of the part, preferably at...

Chapter 20,How Does Plastic Flow?

Design Example: Optimizing gates and ram speed profile Purpose of this example This example illustrates various aspects of the power of CAE software for the plastics industry, and how such software can be strategically applied. It shows how to put into practice many...

Chapter 21, Mold cooling system overview

Mold cooling system overview Importance of cooling system design Mold cooling accounts for more than two-thirds of the total cycle time in the production of injection molded thermoplastic parts. Figure 1 illustrates this point. An efficient cooling circuit design...

Chapter 22,Cooling-channel configuration

Cooling-channel configuration Types of cooling channels Cooling-channel configurations can be serial or parallel. Both configurations are illustrated in Figure 1 below. FIGURE 1. Cooling-channel configurations Parallel cooling channels Parallel cooling channels are...