Edge Gate Design and Functionality

The video tutorial explains the runner system in injection molding, focusing on the sprue, runner, and gate. It details the edge gate's role, its manual trimming process, and its rectangular shape. The tutorial covers how the edge gate channel can be enlarged without removing the tool, allowing more plastic flow. It also discusses the design and placement of the edge gate, emphasizing its simplicity and flexibility in positioning. Finally, it provides dimensions and flow considerations, highlighting the importance of radius for smooth plastic flow.

What is the primary function of the sprue in the runner system?

• To cool the plastic

• To shape the final product

• To bring plastic from the barrel into the runner

• To remove excess material

What happens to the gate after the molding process?

• It dissolves naturally

• It is manually trimmed by operators

• It is left attached to the part

• It is automatically removed by the machine

What shape does the gate have?

• Hexagonal

• Circular

• Triangular

• Rectangular

How can the edge gate channel be enlarged?

• By replacing the tool

• By adding more plastic

• By grinding down the channel

• By heating the plastic

Where is the edge gate typically placed?

• Inside the mold

• On the parting line

• On the top of the part

• At the bottom of the part

What is a key advantage of the edge gate's design?

• It is a simple cut-out shape

• It requires multiple channels

• It is complex and difficult to mill

• It cannot be modified once created

How does the edge gate fill the part?

• From multiple positions including the side and back

• Only from the bottom

• Only from the top

• Only from the side

What is the minimum dimension of the edge gate?

• 10 thousands

• 20 thousands

• 40 thousands

• 30 thousands

What is the purpose of the radius in the edge gate?

• To reduce the size of the gate

• To enhance the aesthetic of the part

• To prevent plastic flow

• To facilitate plastic flow from the runner

What is the relationship between the edge gate width and the part wall thickness?

• The width is 2 to 10 times the wall thickness

• The width is always equal to the wall thickness

• The width is unrelated to the wall thickness

• The width is half the wall thickness