Week 8 - Challenge 6 - Core & Cavity Design

AIM:

Create the Core and cavity blocks for the switch bezel 

OBJECTIVE:

• To crate a tooling axis for the plastic component
• To create a Switch Bezel  of plastic component from given Class A surface.
• To perform the draft analysis over the plastic component.
• Creation of Core Cavity Blocks for the switch bezel

PROCEDURE:

Generating tooling axis

• Doing the continuity check to ensure whether given class A surface is continuos or not.By using Boundry/jion method,It seems there is no dis-continuos boundry

• Then using the Boundry create a Bisecting line B/w 2 edges of a component along one plane

• Then create one more line with respect to other side surface of the component,for that given 3^0 WRT surface

• created the tooling axis b/w those two lines created above using Bysecting method

• Perform draft analysis on the given class A surface,Below pic shows the result of draft analysis,It cleares that it has 3^0 draft throughout the surface with respect to tooling axis as it is in green color

Creating Class B surface:

• First Extract the surface base
• untrim the surface base
• Then extrapolite wherever reuired
• Offset ClaasA surface to 2.5 mm ,then we will get desired class B base surface
• Similarly do the above procedure for All the sides and Top Surface
• Side surfaces of switch bezel
• Top Surface
• Then trim all the surfaces together

• Give the Fillets in required region And It's the finle Class B

Creation of Class C:

• Extract all the boundry of class A surface Then sweep it seperataley
• Trim them together then we will get Class C surface

• Jion the class A & class C surface(by trimming)

• Then jion all the Class A,B & C Surfaces

• Then convert this closed surface to part body in the part workbench,we will get the required switch bezel plastic component 

•  perform the Draft analysis on the Finle model. 

From the above figure we can observe it is satisfying 2.9^0 draft It's Approximately 3^0 nominal draft

Hence plastic component can be created

•  solid model with the proper color code of the draft angle in various orientations
  • green- 3^0
  • Red- 0^0
  • Blue- negative side
• Isometric view

• Front view/Back view

• Core & Cavity

The Mould Core & Cavity are the shaped sections in either half of the mould tool which give the plastic product its final shape. The hot molten material is injected into the core & cavity and then sets hard into shape. The design of the core & cavity is essential in the correct formation of the product.

 Parting Surface:

 A Parting Surface is a surface that seperates the mold block into two parts,the core & cavity or we can defined as it is the surface where the core and cavity meet when the mold is closed.

PARTING LINE:

 It is the junction between component and parting surface.

Core:

 

Cavity:

Cavity with part

• ISO VIEW

• FRONT VIEW

• SIDE VIEW

• TOP VIEW with Parting line & Parting surface

• Section view of Core & Cavity 

• Core & cavity with Parting line & parting surface

CONCLUSION:

• The Plastic Component is created & Draft analysis is Done
• Created the Core and cavity blocks for the switch bezel