Laboratory Manual
CAM 3 – Core & Cavity Design – Injection
molds
Faculty of Mechanical Engineering and Robotics
Department of Robotics and Mechatronics
Dr. Eng. Zbigniew Śliwa
Objective
To create surface elements of the injection
mold on the basis of the given solid model
geometry.
2
Prerequisites
The basic knowledge of CATIA v5 in the
scope of files management, 3D model
manipulation and the proper use of
specification tree.
NOTICE !
To complete the task you need to have the model named: CCDmodel.CATPart.
You should download or receive by e-mail the file CCDmodel.stp . Open it
in Part Design module. System will transform the file to the CATPart format.
Save the transformed file.
3
Preparatory activities
1. Open new folder named Core & Cavity Design and save CCDmodel CATIA
Part in it.
2. Open the new file of type Product and save it in the just created folder
with the name Product1
3. Click Product1 in the specification tree and choose module Core & Cavity
Design
4. Find Import Model (on the right side) and apply to the file CCD.CATPart
The model and the tree should look exactly like in
the figure
Check carefully !
The imported model is presented in the tree with the
name: MoldedPart.
4
Main Pulling Direction
1. Choose Pulling Direction (menu on right)
2. Click the model
3. In the opened window don't change
settings and click OK.
New elements: Core, Cavity, Other,
NoDraft appeared in the tree.
Their colors are respectively: red,
green, blue and pink.
Two last elements need further
actions
5
Direction in Slider Area
1. Choose icon Slider Lifter Direction
2. Drag the compass to the center of the hole to define the pulling
direction in the area.
3. When value -1 appears in the field DX, click Locked
4. In the bottom of the window click Local transfer (or Target in CATIA
v5r20) and choose Point continuity
5. Click the flat pink face and (focused) blue face of hole. Click OK. Both
chosen faces should become yellow defining a Slider Area.
The tree shows replacement of
two faces: Other and NoDraft,
with the one: Slider/Lifter.
6
Explode View
1. Switch on the icon Explode View
2. Change Explode value into 100.
3. You can choose one or two of pulling
directions listed in the window Pulling
direction
Explode View helps to evaluate
surfaces and pulling directions
7
The Cavity – preparatory activities
1. From main menu choose: Insert → Geometrical Set.
Enter name PS Cav Temp (Parting Surface Cavity
Temporary). The name matters !!! Be exact.
2. Hide in the tree: Core and Slider/Lifter
3. Delete empty branches Other i NoDraft
4. Draw the sketch on plane xy: a square 300x300 mm
with the center point (0, 0)
8
Parting Surfaces (1)
1. Choose Parting Surface from the workbench
2. Click the model in 3D space
3. Click two white points on the edge.
Mark
Choose
After the second point
the green line appears
2 1 Click
the opposite
line
9
Parting Surfaces (2)
In the same way make surfaces adjacent to
the straight segments of the edge of the
model's base
10
Parting Surfaces (3)
Change
operation
In the same way
make surfaces by
the three remaining
arcs of the model's
edge.
Choose two points
of the arc and two
edges marked as
Section1
and Section2
11
Parting Surfaces (4)
Back to
Extrude
2
Click two white points of
the vertical profile
and the opposite line
12
Parting Surfaces (5)
There are still two
gaps to be filled in
with surface elements.
13
Parting Surfaces (6)
Click
Sweep
Then
Profile and then OK
Guide curve
Do the same on
the other side
of the „tunel”
14
Conjoining the surfaces
1. Find and click Join.
2. Click each formed surface, excluding the
green one of the model belonging to the
Cavity in the specification tree. Then OK.
PSCavity contains all newly
created surface elements (except
the green model).
The last Join element contains all
surfaces joined together.
15
Checking the surface
Click Join in the specification tree. All borders of faces are
marked with orange color
Notice that all original component surfaces forming the Join
surface have been automatically hidden.
16
Cutting the surface (1)
Find and click
3D Curve Offset
Fill in the data into Curve Offset Definition widow by
clicking proper elements (rectangular sketch, xy plane)
and setting the Offset value: -35 mm. Then OK.
17
Cutting the surface (2)
Choose
Extrude
Build a surface with
data given below
18
Cutting the surface (3)
Use Split with data shown in the figure. If needed, click Other side
to remove the outer part of the surface. Then OK.
Hide a cutting surface.
19
Moving the surface to the Cavity.1 (1)
Choose Propagation type and Destination like the figure shows.
Click
Click white surface somewhere by the model. The surface will
Transfer an element change color into green.
Choose
Copy
Click
20 OK
Moving the surface to the Cavity.1 (2)
In the Cavity.1 branch of the tree the new
element TrfSurface appeared which is a copy
of elements forming the parting surface.
When clicking each element of the Cavity branch,
the respective geometry area should be
marked.
21
Aggregating the element Cavity.1 (1)
Choose In the definition window choose
Aggregate Mold Area Cavity.1 and mark Create datum
Join. The list of elements should
be automatically filled in.
Click OK.
22
Aggregating the element Cavity.1 (2)
In the Cavity branch
the new element
Surface.7 appeared. It
represents the whole
surface of the mold's
cavity.
Surface.2 has been
automatically moved to the new
branch CCV_NoShow.1
in the end of the tree.
Split.2 must be hidden manually.
23
Modeling the Core
1. Hide the surface in Cavity.1
2. Show the surface in Core.1
3. Insert the new Geometrical Set and name it PS Cor Temp
4. Perform subsequent steps as described from point 4 on page 8.
24
The surface of Core.1
The second part of the mold is ready made.
25
Modeling the Slider/Lifter (1)
1. Hide the surface in the Core.1 branch
2. Show the surface in the Slider/Lifter.1 branch
3. Create the new Geometrical Set (Insert-> Geometrical
Set) and name it PS Slid Temp.
4. Create or copy the sketch with rectangle 300x300 mm
and the center point (0, 0).
26
Modeling the Slider/Lifter (2)
Choose Click the model surface.
Parting Surface White points appear
Take two points and
opposite line of the
sketch to create
surfaces in the way
applied before. The
result should be as
visible on the next
slide.
27
Modeling the Slider/Lifter (3)
Press OK.
The system will automatically
merge created elements into one
Join and will hide original
elements.
28
Modeling the Slider/Lifter (4)
According to the method applied to the two
previous surfaces, make Split,Transfer an
element and Aggregate Mold Area.
The final result is shown in the figure.
29
The final result of the task completion
1. Show surfaces in Cavity.1 and Core.1, as well as
Solid.1 in the branch Result of PartBody.
2. Apply Explode View.
The task is
completed.
Compare results.
30
Summary.
Created surfaces can be used to design the
injection or casting mold.
31
Good Luck !
32
