Abstract: In general, to determine a product can open the mould, should follow the idea: product appearance and requirements → structure → glue mouth → demoulding why is so? Next, I take a product as an example to illustrate that in the whole design process, the changes of ideas caused by various factors lead to the change of mold design results.

In general, to determine whether a product can open the mold, should follow the following idea:

Product appearance and requirements → structure → glue mouth → demoulding

Why is that?

Next, I take a product as an example to illustrate that in the whole design process, the changes of ideas caused by various factors lead to the change of mold design results.

This product, when we get it in hand, let's take a look at its main message. In this picture, the red circles are inverted. The product is a decorative strip, appearance piece. It is not allowed to damage the appearance unless the mold structure is necessary.

There are small side holes on the left and right sides are inverted, and the parting surface on both sides shown by the drawing analysis is just on the appearance surface. In order to maximize the appearance of beautiful, the left and right sides should consider the whole side as a whole slider. The parting should not follow the position shown in the drawing analysis, but should be wrapped to the bottom of the product, as shown in the red line in the picture below.

The reason why the package is here is that if the mold has been produced for a long time, the mold will wear out, or the mold is not properly matched. The position of the parting surface is easy to produce burrs, and the product parting is moved to the inside. If there are burrs here, it has no impact on the quality of the whole product, and it belongs to the invisible position.

Next, look at the upside-down part of the picture, which is the most troublesome part of the mold. AB two inverted, nothing more than to do inside slider or inclined top.

You want to talk about this position, you want to talk about it with the gate, because there's an effect between the two. The choice of gate for this product is better in two places, as shown in the arrow.

Do the inside, because the middle position is not inverted, you can do hidden gate or horn gate, do not increase the difficulty of the mold. And, do inside, can greatly reduce mold eccentricity. Therefore, the gate should be selected in the more appropriate.

Because the gate is inside, the inclined roof can leave more space here. Add a group of thimble plate in the front die, is a more reasonable choice.

See the above parting, part of the inclined top of the front die is below the two big sliders outside. If the large sliders on the left and right sides are the rear die sliders, then the inclined top of the front die and the rear die sliders will produce displacement in the direction of opening the die. When the die is fully opened, the slant top rests on the front die and disconnects from the back die. When closing the die, the inclined top of the front die must be synchronized with the parting surface, otherwise it will hit the die.

Therefore, the overall large slider on both sides of the product must be made into a inclined spring or inclined top of the front die to ensure synchronization.

Here, basically clear thinking, the left and right sides of the spring, the middle position of the front die inclined top.

Since the inclined top is driven by the thimble plate, the inclined spring is driven by its own hooks and springs. Due to the different driving force of the two, it is difficult to ensure complete synchronization. If the inclined spring moves first when the mold is opened, it is bound to pull the sealing surface of the inclined top and the inclined spring.

How do you guarantee perfect synchronization?

Only when the two rely on the same driving force can they be guaranteed to advance and retreat at the same time.

Therefore, the left and right slant should be placed on the front die thimble plate, so that they can be fully synchronized. So, if you do that, the slant becomes a slant. So the mold looks something like this.

The left and right slant became a slant top, but not quite a slant top, and the top was pulled by the hook. A spring is mounted on the top of the slant.

But a new question arises. What drives the thimble board?

Consider spring drive, oblique spring and above the hook, then, oblique spring at the top of the spring can be cancelled, directly on the front mold back needle spring.

In order to ensure that the mold can be completely started when opening, so that the force point does not act on the inclined spring I-word, we add elastic glue at the bottom of the thimble plate of the front mold, so that neither the spring failure, nor the gap between the hooks is worried. Minimize the risk, to meet the mold requirements we need.

Every time you get a new product, you should proceed according to this idea, which should be the idea, or mind map, of a qualified mold designer to maximize the focus.