Hearing Ou Tiexin's invitation, Yan Liqiang laughed and agreed readily, "Haha, I'm just thinking about it. Even if Lord Ou doesn't say it, I want to go and see. Is this water and lighter workshop right in front?"

Ou Tiexin pointed to the front, "The workshop that made this water lighter is right in front, and you will be there after a few more steps!"

"Hahaha, Li Qiang, when I heard that you and Master Zhang had made a water and lighter, Tiexin bought three water and lighter machines from Pingxi County and sent them back. As soon as I came back, I took a bunch of craftsmen to dismantle the water and lighter and studied it all, and started to imitate it. Tiexin praised this water and lighter!" Luo Yutian also smiled, and then looked at Ou Tiexin, "Tiexin, if you have any problems this time, this time, you can ask Li Qiang for advice in person. This is a rare opportunity. Even if other craftsmen want to ask Li Qiang for guidance, they may not be able to contact us!"

"Hahaha, Brother Luo is polite. I'm here today, so I'm here to gain insight!"

Luo Yutian pointed at Yan Liqiang, "Humatizing, Liqiang, you are humble again!"

Yan Liqiang smiled...

"I have a question to ask Lord Yan for advice. I heard that this water and lighter was invented by Lord and Zhang Yourong, the master of the world's number one institution of Lingshan Sect. I wonder how he thought of inventing this thing at the beginning?" Ou Tiexin asked. When he asked, the craftsmen accompanying him showed an listening look. Because of this question, they were also very curious. It happened that the master craftsmen of Tiangong came to Jiancheng in person today, so they were about to listen.

"At that time, Brother Zhang made a few gadgets and took them out to discuss with me. He wanted the thing to run without manpower. We discussed it together. Once, while cooking tea, I saw the boiling teapot moving up and down under the impact of water vapor. Therefore, I got inspiration and found a way to use the power of water and fire to drive things to run continuously!"

"I admire you, I admire you, I didn't expect that this water lighter could be made of tea!" After hearing this, Ou Tiexin and a group of craftsmen looked at Yan Liqiang with awesome look. If Yan Liqiang didn't say it, they wouldn't have thought that this water lighter was actually a two powerful person who drank tea together and found it when they saw the teapot boiling. The great man was indeed a great man.

"In the end, you will follow the path of investigating things. You will learn from things, observe all things and work together, benefit the world and be remembered forever. Don't underestimate the ability you have in your hands!"

Hearing Yan Liqiang's words, Ou Tiexin and the craftsmen were shocked. They felt that this words were full of charm and could benefit those who were craftsmen for life. Even Luo Yutian couldn't help but praise him again, "Liqiang said it well!"

The group said, after a while, they arrived at a large workshop covering an area of ​​dozens of acres, which was a workshop that made water and lighters in Jiangcheng. There were two large chimneys in the workshop, which were rolling farm poplars. Below the chimney was a furnace of melted iron, with hot air rolling and iron flowing...

When everyone came, a group of craftsmen in the water and lighter workshop were busy working. A craftsman with a craftsman's head looked sweaty and hurried over to salute Luo Yutian, Yan Liqiang, Ou Tiexin and others, and then took everyone to patrol and visit.

Under the leadership of the craftsman, everyone walked into the workshop and just saw a group of craftsmen busying themselves. The most important parts of the water and lighter manufacturing were cast, so the most important process in the workshop was casting.

"Master Ou, I think the workshop of this water and lighter should have just been expanded, right?" Yan Liqiang looked as he walked. There was a very basic flow production model in this workshop. However, Yan Liqiang could still see the iron melting furnace and the sand boxes very new. As for the casting process, let's not talk about it. It seems that it is not much different from the manufacturing bureau under his command. But in fact, in this casting process, some subtle differences are enough to have a huge impact.

"Sir, I also saw that there were not many objects that needed to be cast in the craftsman city before, so this casting workshop was not big. However, if we wanted to make water and lighters, the casting workshop in the past was not enough and it had to be expanded. The workshop in front of us was newly expanded!" Ou Tiexin said, looking at Yan Liqiang and said straightforwardly, "Although water and lighters are also produced here, we made water and lighters according to the parallel cargo aircraft of the Manufacturing Bureau under our command are not as easy to use as water and lighters of the Manufacturing Bureau. There are often problems..."

"Does there often be sand holes on the castings you poured?" Yan Liqiang said casually.

"Ah, sir, do you see?" Ou Tiexin and a marshal looked at Yan Liqiang in surprise. No one expected that Yan Liqiang just came here to take a look and suddenly discovered the problem. "It is because there are too many problems in the casting here. Only one or two of the ten pieces can be used, so they are inefficient and consume countless expenses. It is really nerve-wracking. Lord Luo rewarded thousands of taels of gold to seek a solution, but no one can solve it..."

"The sand shape is being cleaned over there, let's go over and take a look..." Yan Liqiang said, and then he came to the place where several craftsmen were dismantling the sand boxes in the workshop, watching the craftsmen cleaning the sand shape outside the castings.

As the sand shape is cleaned, the castings under the sand shape also reveal its original appearance. This casting is the most critical cylinder component in the water and lighter. Such components can only be formed through casting, and it is completely impossible to knock and hit.

Yan Liqiang squatted down and looked at it. On the surface of the cleaned cylinder, he could see a lot of sand holes with his naked eyes, which greatly affected the quality of the cylinder. He grabbed a handful of the cleaned sand shape with his hand, rubbed it in his hand, and then stood up. This problem was encountered by the Manufacturing Bureau at the beginning, but later Yan Liqiang relied on his powerful knowledge reserve ability in memory to solve it.

It is also a sad part of the Han Empire. The casting process is actually not complicated. The sand casting process has existed for a long time. In addition to this process, there are also more complex cavity melting wax casting methods. However, these casting processes have been used for a long time, not to improve production efficiency, but to cast exquisite and various ritual instruments, such as various tripods, bells, and burial objects. These things are cast in copper or silver. To put it bluntly, they are used to enjoy and demonstrate their identity for the powerful and wealthy families.

The steel objects forged forging used to improve the productivity of the entire society are pitifully rare. Correspondingly, casting becomes a construction. In the end, it can only be built by relying on the blacksmith to create something. The productivity of the entire society will not be improved for a long time, and the casting process will stagnate for a long time. People who truly understand steel casting are simply rare.

Although casting and building are only one word different, the direction of social development that evolved later was far different. One was an agricultural society, while the other was strides towards the initial industrialization direction, and the last one was ahead of the world...

It is estimated that Jiangcheng rarely casts any steel objects in the past, so now he has started to imitate water and lighters. He found that although the process is the same process, which seems not complicated and can be mastered, due to some subtle differences, they cannot create finished products like the manufacturing bureau in any case.

"Sir, can this problem be solved?"

Yan Liqiang patted the dust on his hands and stood up, "This problem can be solved!"

"I don't know where this problem comes from. We craftsmen have been thinking about it for a year but haven't found out the problem?"

"Did you use straw ash and dry sand when you gather sand?"

"Is there any problem with this?" Ou Tiexin looked at Yan Liqiang in confusion. "Some of the utensils cast in Jiangcheng were not exactly the case when making sand molds, but there was no problem before?"

"Are the artifacts you cast in copper or iron?"

"It's copper!"

"The melting temperature of iron is nearly half higher than that of copper, and the weight under the same volume is much larger. Although it is the same sand casting process, do you think the sand-polymerization things used for both are the same?"

Ou Tiexin was shocked and quickly bowed to Yan Liqiang, "I would like to ask for advice from you!"

"The most important reason why cast iron molds produce sand holes is that the surface strength drops sharply after the sand mold solidifies and dehydrates and drys. The surface sand particles are easily eroded by heavier and hotter iron into the iron liquid. This way, sand holes will be produced. If you want to avoid sand holes, you cannot use straw ash and dry sand when collecting sand. Instead, clay with greater humidity or a little paste must be added to stir. Then the sand mold must be heavily formed. Before casting the sand mold for half an hour, the sand mold must be sprayed with water mist. Don't let it dry. Remember..."

Yan Liqiang said, but the secret method among craftsmen is worth ten thousand gold. If placed elsewhere, this is definitely the unique skill of those craftsmen who pass on men but not women. When Yan Liqiang said this method to solve the casting sand hole, Ou Tiexin and the craftsmen next to him were both very happy. They all looked at Yan Liqiang with admiration. This craftsman is really not a blow to the craftsman. Just one look at him and you will know the problem...

Luo Yutian also laughed, "Li Qiang, in this way, the water and lighters made in this workshop will probably be the same as those built by your manufacturing bureau?"

"Does Brother Luo want to hear the truth?"

"What's the truth?"

Yan Liqiang shook his head, "Even if this problem is solved, the water and lighters made in Jiangcheng workshop are only better than yours before, but there will still be a gap compared to those of the manufacturing bureau, and this gap is very difficult to make up, and the gap may become bigger and bigger in the future!"

Ou Tiexin, who was a little happy just now, suddenly became dissatisfied. "Sir, I'm afraid it's an exaggeration to say this. How could there be such a big gap for the same water and lighter?"

Luo Yutian also looked at Yan Liqiang with a puzzled look...

Seeing a short hair sticking to the leather apron that Ou Tiexin was wearing, Yan Liqiang reached out and pinched the hair, "In my manufacturing bureau, the weight, thickness, and volume of this hair. I require all qualified craftsmen to be able to measure and calculate it completely. If you want to use copper and iron to make a thing the same as this hair, everyone must draw the same drawing. People who have never seen this hair do it according to the drawings and can make the same thing. I wonder who in this craftsman city can tell me the weight, thickness, and volume of this hair. You draw the drawings and let others do it. How many people can make the same thing as this hair?"

A craftsman, including Ou Tiexin, heard Yan Liqiang's question and looked at the hair on Yan Liqiang's hand and was stunned.

It was Ou Tiexin the first to react, "Is there a different measurement system in the manufacturing bureau of adults?"
Chapter completed!