“When designing molds, copper materials are sometimes used, such as bronze inclined top guide blocks, or beryllium copper inserts for rear mold cores. Can you introduce bronze, brass, beryllium copper, cup copper, and their application in molds? What’s the scope?”
He should have wanted to ask how to apply these kinds of materials. In fact, these things have troubled me for a long time, and now I generally understand, but I have to say one, two, three, four in detail, and why is beryllium? What about copper, but not other materials?
It is not clear, we are not engaged in material research. I think that for those who do mold design, if they can understand a general idea, they can basically handle it.
To figure out how to use it, you must first understand the difference between these materials.
No matter it is bronze, brass, beryllium copper, etc., they are all copper alloys. Different other metals are added to copper to form different alloys. For example, bronze, tin or lead is added to copper; brass, copper is added to copper. Zinc, etc., you can go to Baidu for details.
There are many copper alloys, and the most used ones are brass, bronze and beryllium copper.
These three materials, beryllium copper, I believe many people know that when cooling is not easy in some places on the mold, we often make beryllium copper inserts, which can effectively cool.
The main reason for this is that for materials with comparable hardness, its conductivity is better; for materials with good conductivity, its hardness and fatigue strength are better. Therefore, the main reason for choosing it is that its comprehensive performance On the one hand, it is relatively suitable.
Brass and bronze, in terms of molds, are mostly used as accessories. What are accessories? For example, wear blocks, bushings, etc. For the specific usage, let’s take a look at its characteristics first. I extracted these two points from the encyclopedia.

The main characteristics of bronze are low melting point, high hardness, strong plasticity, wear resistance and corrosion resistance.
Brass The main characteristics of mechanical properties and wear resistance are very good.
What are mechanical properties? The parts made of this material are used on machinery. Good performance is better than bad, more durable and not easy to break.
So, the question is, both of them say good wear resistance, which one is used? In this question, we need to know the difference between the two

One: Bronze is more expensive than brass. For mold making, this is often a choice.
Two: In terms of wear resistance, bronze is better.
Three: Bronze is a little harder than brass.

To sum up the above characteristics, the mold has higher requirements on wear resistance and high precision, and we mostly use bronze. For example, like some bushings, it has been moving in it, and the accuracy requirements are relatively high. Therefore, in the thread mold, sometimes it is not easy to make bearings, or we do not have the specifications we want. We directly make bronze sleeves instead of bearings, and bronze sleeves are also used.

And some wear-resistant plates on the mold, guide sleeves and the like use brass more. why? Because the texture is relatively soft, the replacement cost is relatively low. Will not eat steel.

As the student said, why are the inclined roof guide blocks made of bronze? Can I use brass? Or what about other materials? This can not be generalized, and it is directly made of steel. If I had a choice, what would I use? The quantity is not large, the mold price is good, and the mold grade requirements are high, so bronze must be used.

What about cup bronze? This material is rarely used. I went to Baidu to check it. It is said that the cup is a copper sleeve. It belongs to a kind of bronze, called tin bronze, and cup bronze should be understood as a kind of copper used to make some kind of copper.