Presentation: report design and manufacture of plastic injection molds

REPORT 
 DESIGN AND 

MANUFACTURING PLASTIC 
MOULD

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CONTENT

NOTICES about THE SHAPE  oF 
PRODUCT DESIGN PRODUCTS 
FOR INJECTION INJECTION MOLD


Content 
The shape of the product
The thickness of the 
product
circle Corner nerve
 Lugs protruding? hole 
on product? Corner exit 
mold? thread on 
products


The thickness of the product.
Nên thiết kế thành mỏng, tạo nhiều gân tăng độ cứng

Figure 1.1 The transition from part design


The related disability
Hìn 1.2 Common disabilities when designing the thickness mismatch.


warping

Fg 1.4 warping the uneven thickness.


Remedy 

Figure 1.5 Comparison.

To correct the warping, the need to design
a uniform thickness, the following
is some way designed to make uniform
thickness:


circle Corner 
By about 25­60% boron corner thickness, 50% is the best

Outer radius radius should equal the thickness 
of the product plus: R = r+ T.

circle Corner 

Figure 2.2 Dimensions Design bo corner.
floors


Defects involving round corner


RIBS

The thickness tendon thickness not exceeding ½ set tendon
• tendon thickness affects the priority flow
Geometric parameters of the tendon
Tendon thickness: t = <0.5T
Nearby Height: h = <3T
Bo corner radius: r> = (0.25­0.5) T
Research Corner: ᶲ> = 0.5 degrees
The distance of the tendon: S> = 2T


The thickness of the tendon does not exceed
the ½ thickness placed near, the site
less shrinkage material and does not affect the aesthetic can put a 
little thick.


Figure 3.2 The designations tendon.

The ribs should be placed along one

direction to achieve good rigidity.


RIBS
The ribs should be designed in parallel.
• It should be placed along a direction to increase the
stiffness
Create corrugated ribs increase the strength and aesthetics.
• Create cross tendon cungvung increases, resistance to
stress.


Reinforcement such

The design parameters stiffening ribs


 Vấu lồi
The thickness is less than 75% lugs protruding put the lug thickness.

Outer radius equal to 25%
transition should put the
paw thickness
or by 0.04mm to reduce
stress.




DESIGN

• The taper angle of 0.5 degrees in 
addition to the minimum and 
should taper in the smallest
0.25 degrees.
• The lugs protruding far into the 
product put up extra hard team 
tendon increase
firmly.


DESIGN SIZES


5. hole on products
• hole depth does not exceed 3 times the diameter of the hole (hole not 
informed).
• Lengths of holes evenly, without the
sharp corner.


• Two hole distance or distance than the outer edge of the 
hole
should equal twice the thickness or twice size
measure the circumference most hole (hole smoothly).


6. DRAFT ANGLE
• Products with ribs, lugs protruding, deep 
groove ... or beveled surface, you should
design towards open mold taper angle.

• We can rely on to design the diagram below 
for proper taper angle.


• The value depends on the angle shoulder of plastic shrinkage and 
height
Slovak.
• Structural molds suitable for easy product.


7 Products with thread
Lace and lace foot radius should be greater 
focus to avoid application
productivity.