Presentation: report design and manufacture of plastic injection molds

Presentations report design and manufacture of plastic injection molds was conducted with the following contents: The thickness of the product, the relevant defects, warping, how to fix, corner boards, tendons, tendon increases hard, protruding lug, lug sticking design, holes in the product, ... Invite you to consult the documentation.

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The shape of the product The thickness of the 

product

circle Corner nerve

 Lugs protruding? hole 

on product? Corner exit  mold? thread on 

products

Content  

Nên thi t k  thành m ng, t o nhi u gân tăng đ  c ngế ế ỏ ạ ề ộ ứ

Figure 1.1 The transition from part design

Hìn 1.2 Common disabilities when designing the thickness mismatch.

Fg 1.4 warping the uneven thickness.

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:

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

Outer radius radius should equal the thickness 

of the product plus: R = r+ T

Figure 2.2 Dimensions Design bo corner.floors

Defects involving round corner

the ½ thickness placed near, the site

less shrinkage material and does not affect the aesthetic can put a  little thick.

The ribs should be placed along one direction to achieve good rigidity.

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.

The design parameters stiffening ribs

 V u l i ấ ồ

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 SIZES

• 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).

• The value depends on the angle shoulder of plastic shrinkage and  height

Slovak.

• Structural molds suitable for easy product.

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

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.

• Change a detail of an undercut on other details

we can fabricate it into the mold pull straight.