As a mature industrial designer, when designing products, to give the product a friendly user experience, you must grasp factors such as the process realization and economicality of production. How to weigh, complement and promote each other between design and technology? Today w

As a mature industrial designer ,

When designing products,

should give the product a friendly user experience,

should grasp the factors such as production process realization and economics.

How to weigh, complement and promote each other,

Today we will discuss the relationship between the two on injection molding .

This article mainly involves the following keywords:

Disassembly, mold drafting, mold division line, mold drawing surface, drafting angle/deep

Plastic type products have a variety of molding process

For example:

Injection molding, extrusion, blow molding, molding forming , calendering forming, foaming forming ,

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Injection molding is a kind of equal material manufacturing ,

Then what is equal material manufacturing?

simply means that the volume of the same material remains unchanged, and a manufacturing principle of morphological changes in

0 1.

is a subtractive manufacturing , such as CNC, relative to .

Adjustable manufacturing , for example, 3D printing, for example.

I believe everyone has heard of what injection molding is,

But I don’t know much about it,

Now the editor will introduce it to you “grand”:

What is injection molding?

Injection molding is a method of injecting material into the mold into the mold .

The main method of processing plastics is injection molding.

In this process, the plastic is placed in the hopper,

Then the hopper heats and injects the plastic into it,

It is pushed through a chamber with a reciprocating screw. After

, it is softened to a fluid state.

nozzle is located at the end of the chamber, the fluid plastic is forced to cool through the nozzle, and

closes the mold.

When the plastic is cooled and solidified, the semi-finished product exits from press .

(mold-climbing-pressure-maintenance-melting, metering, loosening and cooling-ejection)

(injection molding product)

What issues should be paid attention to in injection molding and product design?

The first thing to note is - disassembly:

The concept of disassembly:

Remove the product, including shell, decorative parts, functional parts, etc.

The purpose of disassembly:

1. is convenient for installing internal components.
2. is a product's functional services, such as light transmission/sound, rotation, folding, etc.
3. facilitates color separation.
4. other questions.

Notes on disassembly:

1. Overall thinking
2. Single shape integrity,
3. avoid sharp corners, irregularities, special shapes,
4. combined with product functions.
5. and color matching are combined to think.

The second thing to note is - Die line :

Most of the molds used for infusion have several parts splicing ,

. The position at the joint cannot be absolutely smooth.

will have a small gap.

When the infused accessories are produced,

will have a small edge protrusion that is the mold splitting line.

To be more popular, the plastic parts need to be divided into several parts to form a molding.

The various parts are put together to form a closed space.

Then the line between the parts of is the mold split line.

As an example



According to the product analysis of the above figure,

off-white parts are split into three parts, and

modulus line is shown in the figure.

































html ml0





Die-dividing line sometimes affects the beauty of the product.

At this time, you can use the knowledge points of the dividing line to design the product.

regards the dividing line as part of the design, and

How to make the dividing line better integrate with the product.













The third thing to note is the draft slope:

Draft slope is also the demolding slope,

is the slope designed on both sides of the mold chamber for to facilitate mold output . The orientation of the mold release slope depends on the inner and outer dimensions of the plastic parts.

In order for the molded product to be successfully ejected from the mold,

On the wall surface in the same direction as the mold opening and closing (including the side core and reinforcement rib),

must set the draft slope to facilitate mold removal.

Some students will ask,

Why do some products not see the draft slope?

This may be another process,

or draft slope is not large, so it is not easy to find.



(The picture below is about the design of draft angle )



































Factors influencing the draft angle:

1. Designer's styling needs.
2. draft surface depth. Generally, the deeper the draft surface, the smaller the draft angle.
3. draft surface roughness. Generally, the rougher the draft surface, the larger the draft angle needs to be.

Therefore, the consideration of draft angle is indispensable in the product design process

So what impact does the mold division line, draft angle,

have on the designer's design, and what should designers pay attention to?

Precautions for designers:

. Reasonably disassemble the parts

. Pay attention to the impact of draft slope on product shape

. Try not to have mold texture/text design on the draft surface, otherwise the draft slope needs to be increased to exceed your imagination.

. The dense arrangement of holes/holes is not suitable for direct injection molding.

should consider the mold splitting line and draft angle in the design,

because this is related to whether a product can be implemented.

combines process knowledge points with the application of product design,

can make a product design more mature,

is more thoughtful.

Last If you want to learn Creo/Proe product structure design, you must not miss it!

I have sorted out all the materials I have learned from zero foundation to mastering my studies. Whether you are a novice in zero foundation or are already engaged in product-related work!

full set of information acquisition methods: Follow + Like , comment "66" and click the private message button ✉️, send the keyword " information ", it's fine, first come and send~













only partially display

5