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.

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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

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

Figure 1.5 Comparison.

circle Corner

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

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

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

ᶲ Research Corner:  > = 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

V u l

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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.

The last paragraph should be rounded to avoid  flush lace lace and lace damaged.

Avoid designing steps lace <1mm to avoid lace and easy

fabrication flush

When designing plastic threaded metal insert with Iran,

we should design Dies for plastic products in the  metal and lace

Ren for plastic products sometimes do not follow the  standard for manufacturing dex.

Undercut

• Change a detail of an undercut on other details

we can fabricate it into the mold pull straight.