Week 8 - Challenge 6 - Core & Cavity Design

Aim: To create the Core and cavity blocks for the switch bezel.

Tooling axis:

• The axis is the direction in which the mold opens or else the core and cavity open. The tooling axis should help to clear components from the core and cavity, so it plays a very crucial role in plastic designing and manufacturing also.

Parting line:

• It is the line where the core and cavity intersect each other.
• The parting line lies on the B surface of the Plastic component to protect the A surface from the splash.

Parting Surface:

• The surface where the core and cavity meet each other is called the Parting surface.
• The Parting surface also lies on the B surface side.
• The below screenshot shows the surface in orange color which represents the Parting surface and the light blue color line represents the parting line.
• We can clearly see that the parting line and the parting surface are lying on the class B surface.
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Publication:

• Publications are used to publish the Geometric set which can be directly accessed.
• To do Publications, go to Tools-Publications as shown below we can do publications.
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Draft Angle:

• Draft angle is the degree of taper that is incorporated into the side wall and part, core, and cavity of the die-cast tool to aid in the removal of a part. Primarily, their function is to reduce the friction between the part and the tool as it is ejected. Without draft angles, parts can be stripped, dented, or get stuck in the tool.
• Draft angle also reduces the friction between the part, core, and cavity and also reduces the production time as it is easy to reject the part from the core and cavity.

Draft Analysis:

• As the name suggests, draft analysis is nothing but checking the draft angle range i.e., whether the angle is in the ideal range of 3 degrees or not.
• In this analysis we have a colour scale where we can see the range of a specific colour and we can even change the range by double-clicking on the number.
• To do draft analysis go to insert-Analysis-Featured Draft analysis.
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Steps to create a tooling axis by using the bisecting method:

Tooling axis creation-

Creating the tooling axis by using bisecting line and a dummy axis.

The steps to follow for creating a tooling axis:

Open the file which contains the Class A surface, after creating a geometrical set "Tooling Axis" then select the most appropriate position which can clear the part in one short for manufacturing.For the given component i have created two dummy axis ,one in x-axis and the other one in y-axis.

In x-axis i have created two lines with respect to the walls of the class A surface.As shown in the screen shot.

In y-axis i have created two points on the class A surface and joined both using line and drawn line opposite to the other line at an angle of 3 degree.

The Last step create a bisecting line using the above 2 lines and named it as Tooling axis after that hide the dummy tooling axis

Screenshots of the Draft analysis report for switch bezel plastic component

Screenshots of the core and cavity blocks in various orientations (Isometric, Front, Side, and Top View):

Cavity Block:

• Isometric View:
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• Front View/Back View:
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• Side View:
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• Top View

Core Block:

• Isometric View:
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• Front View/Back View:
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• Side View:
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• Top View
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Conclusion:

• Hence all the submission requirements are successfully done and the CATPart file is attached below using the Browse option.