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Chen Xi tried to weld a quarter-sized colored transparent dome, but when he tried it in the rain, the dome was useless, and the rain would leak down the gap between the copper strip and the glass, which proved that the tin was uneven and there was a problem with welding.

Of course, a leaky dome is useless, and Mao Geng was a little deflated for a while. I don't know what kind of process the Europeans used in later generations to make the stained glass dome of the church not leak rain. But all in all, this is by no means high-tech, so Mao Geng does not intend to give up halfway.

Mao Gen asked Chen Xi:

"Why don't most of the places leak out? Why are these areas leaking? Also, can I make up for the leaks? ”

Chen Xi has been doing this job every day for the past few days, and after thinking about it:

"This is because the small craftsmanship is not fine enough, and the thickness and width of the copper strip are different, so the gap with the glass is also different from the width and narrowness, and the gap is often leaky, and if it is repaired, this place will be raised, which is very ugly. Also, where it didn't leak at the beginning, it will leak rain after transportation. Therefore, the small ones did not dare to try any further. ”

Seeing that Chen Xi looked helpless and self-conscious, Mao Geng originally wanted to do something, but now his heart softened, and he had to comfort Chen Xi in turn.

Mao Geng took a closer look at the dome he tried to make, and silently said to himself, failure is success, in fact, Chen Xi's handiwork is still good, but no matter how good the handiwork is, it still can't achieve the consistency of the aluminum profile extruded by the later generations, Mao Geng said in his heart, it would be good if he could extrude the profile, well, it would be better to find rubber, and it would be better to find glass glue.

Of course, rubber doesn't have to think about it for the time being, and that thing is still in the Americas. Of course, glass glue is not to be considered.

However, to make copper profiles, it seems that there is still a way, if you don't care about the cost, you can use the method of milling. If there is an I-shaped profile with the same size and shape, only the glass needs to be embedded in the I-groove of the copper profile, and then soldered, according to the reason, it can not only ensure that there is no water leakage, but also ensure the welding strength, and it will not cause cracks and water leakage after a certain welding place is stressed.

So far, there is no turning back from the bow. But to solve the problem of the dome does not leak, you have to solve the problem of how to make the profile, before the latter problem is solved, I am afraid it is difficult to solve the first problem, Mao Geng can only smile bitterly.

Mao Geng will not let go of this opportunity to exercise the thinking of his disciples, how to use his brains to solve problems, just let the disciples experience, therefore, whenever this time, Mao Geng will habitually gather his disciples to brainstorm.

After a brainstorming, the final choice was not the milling method, but under Mao Gengqi, everyone gossiped and came up with a set of methods for hand-extruding zuò I-shaped copper profiles.

Under the guidance of Mao Geng, Tan Xiaochun drew a drawing of the manual extrusion profile mechanism.

Although the three views drawn by Tan Xiaochun have such and such flaws, it means that the table has come out, and now Tan Xiaochun and Yi Bo can already understand the three views, Mao Geng tried to let the two of them make this set of extrusion mechanisms.

On the fourth day, a set of simple continuous wheel extrusion mechanism was assembled, Mao Geng looked at such a thing with great interest, not to mention whether it can extrude a qualified profile, it is already commendable to be able to do this, Mao Geng is quite satisfied with the table of the two disciples.

Huang Wangcaisheng, who struck iron, had a good strength, and it took almost no effort to make copper bars, and soon made a lot of copper strips, and after the copper bars were made, the next step was the extrusion process.

On one side of an iron plate is a row of wheels facing each other, five pairs in total, all of which are quenched high-carbon steel, which should be effortless against soft-textured copper. From left to right, the rim of five pairs of wheels has different shades of cavity on the car, and behind it is a series of gears and a large hand-cranked handle.

As Chen Xi stuffed the copper bar into the two wheels on the far right, Huang Wangcai began to shake the handle vigorously, but the first squeeze was unsuccessful, and the first two pairs of wheels were smooth and smooth, but they were stuck on the third pair of wheels. Huang Wangcai's brute strength is still unshakable, let alone others.

No rut, had to stop to adjust the third pair of wheels, the center distance of the third pair of wheels was slightly adjusted, and then the handle was shaken again, and the copper bar was driven by the wheel from right to left, and after rolling, it became an I-shaped profile with two concave ends in the middle.

"It's 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 bar was neat and regular from beginning to end, especially after squeezing, the copper bar became smooth and shiny, shining with a golden luster.

As the second and third I-shapes were squeezed out one by one, Mao Geng also let go of a hanging heart. Fortunately, the profile was finally made.

"Okay, just use this copper strip, embed the glass into the groove, and then pour tin, it should not leak."

At this time, Mao Geng breathed a sigh of relief. We don't have aluminum profiles, but we can make copper profiles, which are better ductility than aluminum, and are simply the best materials for extrusion.

However, copper profiles are really a bit extravagant, after all, the use of copper in this era is mainly used to cast copper coins, and the copper production of the Great Song Dynasty is limited, if you want to promote copper profiles, you have to think of another way. I don't know when the copper mine here in Taiwan will be mined, and the copper production in Japan should be there, and the combination of copper profiles and glass will bring an impact to the architecture of this era, at least in terms of high-end buildings.

Of course, the new process of extruding copper profiles and making colored transparent spherical domes has its own significance, but the most important thing is that in this process, the disciples, including some people in the Mao Workshop and even the government-run workshop, have improved their abilities, and over time, the team under their command will grow into elite soldiers, and perhaps in the near future, they will be able to take charge of themselves.

Today's Kaohsiung Special Economic Zone, Mao Geng is also a specialist, housekeeper, engineer, architect, and teacher, and his subordinates manage both the military-to-civilian Zhou Xun Department, as well as his own Mao's workshop team, as well as his own disciples.

The cement workshop and the watch workshop have been hung with government signs, but the glass workshop has remained. If the profitability of the watch is somewhat eye-catching, glass has a much greater profit prospect.

After understanding the magic of the monocular, the Great Song Dynasty military ordered 500 monoculars from Mao's workshop at one time, and 500 telescopes priced at 30 yuan were not much, but follow-up orders should follow.

The mercury glass mirror will soon be launched in small batches, which will be a business with a very promising prospect of attracting gold, and the glass mirror is simply different from the copper mirror, which will undoubtedly be the next growth point of the Kaohsiung Special Economic Zone.

At present, the glass workshop is managed by Kang Depei, and Kang Depei's talent is not outstanding, but it is better to have a knowledge foundation, work in a decent manner, and after some training, it has been able to keep accounts in accordance with Mao Geng's requirements. In this way, Kang Depei is expected to become a qualified enterprise manager under Mao Geng.

According to Mao Geng's plan, in addition to gradually opening a number of manufacturing industries, the exhibition industry is to build a strong research team, which is led by Mao Geng, a traverser, which can be described as unique. As long as you persevere in training, there will definitely be some top-notch talents coming out, and at that time, maybe you don't need Mao Geng to do everything.

Mao Geng consciously positioned the Special Economic Zone as a prefectural bureau level, so the research team was naturally named "Technology Department", and other departments were also named "XX Department".

Soon, Mao Geng's technical department will launch pocket watches, and the government-run watch workshops can give priority to the technology of pocket watches if they are interested.

In line with the principle of first-class accounting, even if it is an enterprise affiliated to Mao Geng, it also has to pay for the technology of the technical department. In this way, the technical department can develop healthily.

After the glass dome problem was solved, Mao Geng was still very busy, Mao Geng not only had to vigorously develop the industry, but also could not let go of the reclamation.

For a while, Mao Geng was exhausted to deal with it, and when he encountered this situation, he could only overdraft his body, and the result of overdraft was fatigue, more and more fatigue, and finally fell ill.

Fortunately, at this time, Ling'er and his party from Lin'an arrived.

(I was on a two-day business trip and it affected the update.) ）