Chen Xi tried to weld a colored transparent dome of one quarter size, but when he tried it in the rain, he found that the dome he made was useless, and the rainwater would leak down the gap between the copper bars and glass, which proved that the tin filling was uneven and there was a problem with welding. Even if Chen Xi, who had the highest skill, could do it with all his strength, the welding level could not reach the leak-proof level.

Of course, a leaking dome is useless, and Mao Geng was a little discouraged for a moment. I don’t know what craft Europeans used in later generations to prevent the church’s stained glass dome from leaking. But in short, this is by no means a high-tech, so Mao Geng did not intend to give up halfway.

Mao Gen asked Chen Xi:

"Why are most places not leaking? Why do these places leak? Also, can leaking places be filled?"

Chen Xi has been doing this job every day these days, and thought for a while and said:

"This is because the small craftsmanship is not fine enough, and the thickness of the copper strips are different, so the width and narrow gaps are also different from the glass gaps. Where the gaps are wide, water will often leak. If it is repaired, this place will be raised and very ugly. Also, the places that did not leak at the beginning will also leak after being moved. Therefore, the small scoops are not afraid to try it down."

Seeing Chen Xi looking at her helpless and ashamed, Mao Geng originally wanted to have some trouble, but now he felt weak, and he had to comfort Chen Xi.

Mao Geng looked at the dome he tried again and silently told himself that failure is a success. In fact, Chen Xi’s handicrafts are pretty good, but no matter how good the handicrafts are, it still cannot achieve the consistency of aluminum profiles extruded by machines in later generations. Mao Geng thought, it would be great if the profiles could be extruded. Well, it would be better to find rubber, and glass rubber.

Of course, there is no need to think about rubber for the time being. That thing is still in the Americas. Of course, there is no need to think about glass rubber.

However, it seems that there is still a way to make copper profiles. If you don’t care about the cost, you can use the milling method. If you have an I-shaped profile with the same size and shape, you only need to embed the glass into the I-shaped groove of the copper profile and then weld it firmly. According to the principle, it can not only ensure that there is no water leakage, but also ensure the welding strength, and it will not cause cracks to occur at a certain welding point after being subjected to force and leaking.

Nowadays, there is no turning back when the bow is drawn. However, to solve the problem of not leaking the dome, we must first solve the problem of how to make profiles. Before the latter problem is solved, it is probably difficult to solve the first problem. Mao Geng can only smile bitterly at this.

Mao Geng will not miss this opportunity to train his disciples' thinking. How to use his brain to solve problems is just enough for the disciples to experience it. Therefore, every time at this time, Mao Geng will habitually summon his disciples to start a brainstorm.

After a brainstorming, the last choice was not the milling method, but under Mao Geng's inspiration, everyone talked and said something, and came up with a set of methods to manually squeeze and make I-shaped copper profiles.

Under Mao Geng's guidance, Tan Xiaochun drew drawings of the hand-extruded profile mechanism.

Although the three views drawn by Tan Xiaochun have flaws, the general meaning is expressed. Now both Tan Xiaochun and Yi Bo can understand the three views, Mao Geng tried to let them make this set of extrusion mechanism.

On the fourth day, a simple continuous wheel extrusion mechanism was assembled. Mao Geng looked at such a thing with interest. Not to mention whether it could squeeze out qualified profiles. It was already rare to be able to do this. Mao Geng was quite satisfied with the performance of the two disciples.

Huang Wangcaisheng, who was making iron, had a lot of strength and made copper strips without much effort. Soon, he made many long copper strips. After the copper strips were made, the next step was to squeeze the process.

One side of an iron plate is equipped with a row of wheels opposite to each other, with five pairs of wheels in total. The five pairs of wheels are all quenched high-carbon steel, and it should be effortless to deal with soft copper materials. From shallow to deep from left to right, the rims of the five pairs of wheels come out of different shades of cavity, and behind them are a series of gears and a large hand-crank handle.

As Chen Xi stuffed the copper bar into the two wheels on the far right, Huang Wangcai began to shake the handle hard behind him, but the first squeeze failed. The first two pairs of wheels passed smoothly, but the third pair of wheels was stuck. Huang Wangcai could not shake his brute force, let alone others.

There was no way, so I had to stop and adjust the third pair of wheels. After slightly adjusting the center distance of the third pair of wheels, I shook the handle again. Driven by the wheel, the copper bars turned from right to left. After rolling over, they became an I-shaped profile with concave and protruding at both ends in the middle.

“So exquisite!”

Chen Xi couldn't put it down with this I-shaped profile. The groove in the middle was slightly wider than the thickness of the glass, and the copper strips were neat and regular from the beginning to the end. Especially after squeezing, the copper strips became smooth and shiny, shining with a golden luster.

As the second and third I-shaped characters were squeezed out one by one, Mao Geng also put down a hanging heart. Fortunately, he finally made a profile.

"Okay, just use this copper bar to embed the glass into the groove and then fill it with tin, so it shouldn't leak."

At this time, Mao Geng breathed a sigh of relief. He thought to himself, we don’t have aluminum profiles, but we can make copper profiles, which have better ductility than aluminum, and are simply the best material for extrusion.

However, copper profiles are really a bit luxurious. After all, the purpose of copper in this era was mainly to cast copper coins. The copper production in the Song Dynasty was limited. If you want to promote copper profiles, you have to think of another way. I don’t know when the copper ore here in Taiwan will be mined. The copper mine in Japan should be produced. The combination of copper profiles and glass will bring an impact to the architecture of this era, at least in high-end architecture.

Of course, extruding copper profiles and making colorful transparent spherical domes are of significance, but the most important thing is that in this process, the disciples, including the Mao Family Workshop and even some people in the official workshop, have improved their abilities. In time, their team will grow into elite soldiers, and perhaps in the near future, they will be able to stand alone.

Today, in Kaohsiung Special Zone, Mao Geng serves as the Chief Executive, housekeeper, engineer, architect, teacher, and under his management include Zhou Xun, the military-to-civilian army, his own Mao family workshop team, and his own disciples.

The cement workshop and the watch workshop have already been officially launched, but the glass workshop has remained. If the profits of the watch are a bit enviable, glass actually has a greater profit prospect.

After learning about the magic of monocular telescopes, the Song Dynasty military ordered 500 monocular telescopes from Mao's workshop at one time. For monocular telescopes priced at 30 stakes, 500 are not a large number, but subsequent orders should follow.

Mercury glass mirrors will soon be launched in small batches, which will be a business with great prospects for money. Glass mirrors are simply a difference compared to bronze mirrors, and this will undoubtedly be the next growth point of the Kaohsiung Special Economic Zone.

The current glass workshop is managed by Kanteppei. Kanteppei's talent is not outstanding, but his advantage lies in his knowledge and proper work. After some training, he can keep accounts according to Mao Geng's requirements. If this continues, Kanteppei is expected to become a qualified corporate manager under Mao Geng.

According to Mao Geng's plan, in addition to gradually opening up a number of manufacturing industries, developing industries will be a strong R&D team. This R&D team is led by Mao Geng, a time traveler, and is unique. As long as you persist in training, some top talents will surely emerge. At that time, Mao Geng may not have to do everything personally.

Mao Geng consciously positioned the Special Administrative Region as the local bureau level, so the R&D team naturally named it the "Technical Department", while other departments were also named "XX Department".

Soon after, Mao Geng’s technical department will launch pocket watches. If you are interested in the official watch workshop, you can give priority to the technology of pocket watches.

Based on the principle of ** accounting, even enterprises affiliated with Mao Geng have to pay for the technology department. In this way, the technology department can develop healthily.

After the problem of glass dome was solved, Mao Geng was still busy. Mao Geng not only had to vigorously develop industry, but also couldn't let go of the matter of cultivation.

For a moment, Mao Geng was exhausted and coping. When he encountered this situation, he could only overdraw his body. The result of overdrawing was fatigue, becoming more and more tired, and finally fell ill.

Fortunately, at this time, the bell from Lin'an and his party arrived.

(I went on a business trip for two days, which affected the update.)
Chapter completed!