Week 8 - Challenge 6 - Core & Cavity Design

Core & Cavity Design

Creating tooling axis:

The ejection from the mold after manufacturing the interior trim must have the nominal 3-degree draft angle.

hence the tooling directions created by considering the above factor and bisecting method is used.

The base surface of the class-A was extracted to create a reference point on the surface using the point, create a line in the z-direction and an axis system was inserted to the point

then using projection intersection along the yz plane is made and the two inclined lines were drawn inside the positioned sketch.

then bisecting lines with the two inclined lines were created.

Bisecting these two lines sketch1 and sketch2 the bisecting line is created and published as a tooling axis.

Draft Analysis

• First the class – A surface is checked before creating the Class –B&C surface and finally the solid body must be analyzed. Both can be done by following the below procedures.
• By changing the view mode to custom view parameters – Material mode then the feature draft analysis is enabled.
• Then the compass was activated and placed with the tooling axis by dragging the red pointer and then locking it.
• Then, by selecting the quick analysis mode, the nominal value will be 3 degrees and checked for the component's draft angle.
• The green color area shows that it satisfies the 3-degree draft angle. If not satisfied then by using the Running point tool the area is measured and then altered to get a successful draft for the created tooling direction.

PARTING SURFACE

• Generally, injection mold has two major components: the movable half and the fixed half, during the injection molding process, these two halves are pressed tightly from a sealed hollow to avoid melt flow leakage and maintain certain holding pressure, the pressed surface is called parting surface, usually, parting surface are the biggest projection outline of the part.

CORE DESIGN

• Core - A portion of the mold that goes inside a cavity to form the interior of a hollow part.
• Core-cavity - A term used to describe a mold created by mating A-side and B-side mold halves.

CAVITY DESIGN

• A mold is a hollow form typically made from stainless steel that has plastic injected into it to manufacture a plastic part.
• The plastic is inserted into the mold cavity, which is a hole in the mold shaped like the desired part.

PARTING LINE

• A parting line is an inevitable part of injection-molded products.
• It is the line of separation between where two halves of a mold meet.
• It manifests itself on injection molded parts as a line that runs the entire perimeter of the part.
• In most parts, it is just a line that runs straight down the middle.