Daming: I asked you to hang yourself, but I didn’t ask you to rebuild the Ming Dynasty

Zhu Youjian stepped forward and knocked on the glass.

It feels very thick.

"Has sandwich glass been produced?"

Zhu Youjian was surprised.

He simply mentioned this to Sun Yunqiu!

He only knew a rough idea, but he didn’t even know the specific manufacturing process!

Just now I was far away and couldn't see clearly. Now I was closer, and I realized that there were tiny steel wires inside the glass.

Obviously, this should be the wired glass tinkered by Sun Yunqiu...

"It has not reached the level that His Majesty said it can withstand bullets."

Zhang Shutang smiled and pointed to the door on one side:

"Your Majesty, do you want to go in and talk?"

Zhu Youjian nodded. He understood what Zhang Shutang meant.

There are many people outside, so it is better for as few people as possible to know this kind of secret.

Sun Yunqiu gave him another way to make money!

Following the open door, a group of people entered the bank.

Zhang Shutang then continued the topic:

"Your Majesty, according to the idea you provided, tempering the glass and then cooling it suddenly can indeed improve the toughness of the glass.

However, I don't know which link went wrong. The hardness of the tempered glass did not meet His Majesty's requirements.

However, the wired glass, which was originally thought to be more difficult, actually met the standard first.

Manager Sun simply put the wired glass into production first.

The protective effect of this wire-lined model is even better than that of the immature quenched model.

However, the glass factory has not made the special glass that His Majesty said could withstand bullets. "

Zhu Youjian nodded:

"Don't worry, since the direction is right, all that's left is just ink and wash skills.

One day we will be able to make it. "

Everyone said yes.

Zhang Shutang took the group to the room where building materials were stacked.

The most conspicuous thing is a piece of broken glass leaning against the wall.

The glass was broken like a spider web, but it still stood firmly against the wall.

Zhang Shutang picked up a sledgehammer and swung it hard.

"Bang!"

The glass, which was five feet long, three feet wide and one inch thick, weighed more than 100 kilograms and suddenly started to beat.

"Snapped!"

Gravity strikes, causing the glass to flip over.

With a snap, it was spread flat on the ground, raising a puff of smoke and dust.

The broken spider webs became even denser.

However, this powerful and heavy blow did not break the hole in the glass.

Zhang Shutang and others helped the glass up again.

After a quick glance, Zhu Youjian was surprised to find that this thing was no different from before!

There were only some broken glass on the ground, but the thick wired glass was still strong.

"Your Majesty, I have personally seen experiments done by others. This kind of wired glass, because of the existence of the internal steel mesh, even if it is broken, it still has a protective effect."

Zhu Youjian smiled and nodded:

"I'm afraid Sun Yunqiu and the others lost a lot of hair again, right?"

"Hahaha!"

As soon as this was said, everyone laughed.

Some people glanced at Wang Zheng's head subconsciously.

The boss of the Ming Dynasty Royal Heavy Equipment Bureau, who is deeply trusted by His Majesty, is "extremely smart".

My hair is gone a long time ago...

Wired explosion-proof glass, also called shatterproof glass, or wire glass.

It is produced by calendering method.

That is, when the glass is in a molten state, the preheated steel wire or steel mesh is pressed into the middle of the glass.

Made by annealing and cutting.

The surface of wired explosion-proof glass can be embossed or polished.

The color can be colorless, transparent or colored.

These things were generally used for special purposes in the past few years, such as explosion-proof, fire-proof, smoke-proof, riot-resistant, etc.

In recent years, it has begun to enter ordinary life scenes, such as high-rise companies, residential glass, etc.

Wired glass is not difficult to manufacture.

To put it bluntly, before the glass solution is pressed into the finished product, the steel wire mesh is laid in advance (it needs to be heated to the same temperature), and after pressing, the glass-wrapped steel wire mesh is formed.

In order to enhance the strength, several layers of glass are usually stacked together.

The reason why wired glass can ensure that it does not fall apart after being broken is because of the traction of these steel wires inside.

At the same time, because the hardness of the glass itself is very high, even if the glass is broken, it is difficult to damage the internal steel wire without special tools.

Therefore, the usage scenarios of this thing are very comprehensive.

The corners of Zhu Youjian's mouth were full of smiles.

Wired glass!

Although this thing cannot withstand direct bullets for the time being...

However, it is enough to protect against stray bullets!

If this thing is installed on a border guard post...

If it were installed in the sunken crenellations of the parapet at the top of the city...

If it is mounted on a chariot...

If it is installed on the guardrail of the warship...

This is an artifact!

Zhu Youjian's heart suddenly became hot.

Sun Yunqiu, Chen Tianqu and other five monsters are really treasures given to him by heaven!

The production technology of tempered glass is not complicated.

Tempered glass was invented in France as early as 1874.

To put it bluntly, this thing is to cut the finished glass into the desired shape and then temper it to 700 degrees twice.

After the glass is heated to a semi-melted state, it is quickly quenched and cooled down.

In this way, uniform compressive stress will be formed on the surface of the glass, while tensile stress will be formed inside.

The existence of internal and external stress improves the bending and impact strength of glass.

The strength of tempered glass is about four times that of ordinary glass.

In addition to being several times stronger, tempered glass will also form fragments with small obtuse angles after breaking, thus ensuring that no secondary damage is caused.

Therefore, this thing is most commonly used in store glass doors and in the automotive industry.

Zhu Youjian raised his eyebrows.

Sun Yunqiu is really a treasure!

It seems that it is time to arrange a trip to South America.

Rubber is on the agenda!

Do not!

We should send people to explore South America!

When planting rubber trees, it will take 6-8 years before the rubber can be tapped.

And Daming's demand for rubber is already imminent!

(Again, neither steam nor internal combustion engines originally used any rubber.

I don't know why some people have the understanding that "steam engines need to use rubber seals"...

Although natural rubber was used by Indians as early as the 11th century.

However, vulcanized rubber that can truly withstand high and low temperatures began in 1839.

The principle is that after heating the natural rubber, sulfur is added to carry out the vulcanization reaction.

but!

At this time, not to mention steam engines, even internal combustion engines had already taken shape!

Not to mention the Ming Dynasty steam engine.

Let’s talk about the West. In 1698, the first steam engine appeared in Europe. In 1705, steam engines began to be widely used in Europe.

Where did the rubber seals come from during these more than 130 years? )

……