A man is a man, after the four of them got drunk, the relationship deepened a lot, at least that Auf no longer said that he couldn't do it without the help of the Soviet Union, but began to really help them! The next thing is the experiment, after hundreds of rounds of tests every day, the problem is once again exposed, the stability of * is not good, and the indicators are much worse than the indicators of the Soviet Union! Liu Hai and Engineer Zhong studied all night, and finally found a problem, but they couldn't solve it! At this time, Auf wanted to speak and stopped, as if he was reluctant to say anything, but his expression looked like he wanted to say again.

"I said Auf, I thought we were revolutionary comrades-in-arms? What's the matter with you? Bangs looked at Auf and said. Of course, we are revolutionary comrades-in-arms, but there are some military secrets that cannot be revealed! Auf said. You used this Katyusha in World War II, what else is there to keep secret! Bangs asked. No, no, no, Hai, you still don't understand, the manufacture and development of a weapon, not only steelmaking and processing, it tests the overall industrial capacity of a country, I can tell you, now yours this, the problem is still in the seal, but just such a simple seal, it depends on your rubber refining and processing capacity, to be honest, your rubber quality is too poor, not only rubber parts, your metallurgical capacity is also insufficient, to be honest, Your current industrial capacity is not enough to support you in the production of a qualified Katyusha*! You might as well consider giving up! "Isn't there a way to replace it?" Bangs asked unwillingly. "Nope!" Auf said.

"Auf, I'm sure you can help us, even a small reminder is very grateful, we can't send such substandard rocket shells to the front line!" Bangs has found Auf again! "Comrade Liu Hai, this makes me very embarrassed, this technology has not been decrypted, this really makes me very embarrassed!" Auf said. "Off, tell me what's the problem?" Bangs asked. "It's not a big problem, but it depends on what the situation is, for example, the cold on the battlefield in North Korea will seriously reduce the elasticity of the rubber seal, and then the first experiment will happen!" Auf said. "Auf must have a way, it's actually very simple, isn't it, just a little hint! Is it Auf? Bangs asked earnestly. When boiling the soup, you should keep stirring, so that it is convenient for all kinds of ingredients to fully penetrate into the soup, so that the soup will be delicious! Do you say yes, dear Liu! Old-Flo said thoughtlessly, and then looked at the bangs strangely! Bangs looked at Auf inexplicably!

"That's what he said, that's what he said, I really don't understand!" Bangs said embarrassedly. "I really don't understand, but this old boy won't say this sentence for no reason, there must be a mystery!" Engineer Zhong said, "There is only one rubber processing factory in Northeast China, let's go there and ask, maybe the people in the rubber factory know!" "Yes, yes, yes!" Liu Hai and Engineer Zhong hurried to the rubber factory! After arriving at the rubber factory, Engineer Zhong found the technical section chief of the rubber factory and told him about the situation. The technical section chief sighed. "Engineer Zhong, Master Liu, I won't tell you that the rubber material we have provided to you is already the best product we can come up with!" The technical section chief said sincerely. "We know, but there is a Soviet expert who gave us a little hint on rubber, but we are not professionals, and we really don't understand this aspect!" Engineer Zhong said. "What's the hint?" The head of the technical section asked. "A soup making tip!" Engineer Zhong said.

"It is necessary to keep stirring to fully penetrate all kinds of ingredients!" The technical section chief kept muttering this sentence! "What the hell is going on? Did you have an epiphany? Bangs walked over and asked. Looks like something has an idea! "The technical section chief walked around and thought about it for a long time, but he didn't seem to get to the point! After arriving in the evening, he still didn't come up with anything, and the technical section chief called Engineer Zhong and Liu Hai to eat in the canteen together! The three of them made noodles and steamed buns, and while they were sitting there eating, there was a worker next to them, drinking the soup and saying to the worker next to him, "This soup is boiled evenly today, and the entrance is good!" "Huh?" The head of the technical section spit out a mouthful of steamed buns that he had eaten in his mouth, "I seem to understand!" The technical section chief stood up and said to a few people in the back, "Don't eat, come with me to the workshop!" ”

"You see, the processing of rubber is divided into several processes, and there are many kinds of rubber products, but the production process is basically the same. For products made of general solid rubber as raw materials, the production process mainly includes: raw material preparation, plastic refining, mixing, molding, vulcanization, resting, and inspection! The technical section chief seemed to really think of something, and said excitedly, "In the process of preparing raw materials, the ingredients must be weighed accurately according to the recipe. In order to make the raw rubber and the compounding agent can be evenly mixed with each other, some materials need to be processed: the raw rubber should be baked in the oven between 60 and 70 degrees to soften, and then cut and break the rubber into small pieces; Bulk compounding agents such as paraffin, stearic acid, rosin, etc. should be crushed; If the powdered compounding agent contains mechanical impurities or coarse particles, it needs to be screened and removed; Liquid compounding agents (pine tar, coumaron) need to be heated, melted, evaporated, and impurities filtered; The compounding agent should be dried, otherwise it is easy to agglomerate, and the old can not be dispersed evenly during mixing, and bubbles will be generated during vulcanization, which will affect the product quality; I think what the Soviet expert meant was heating, melting, evaporating water, filtering impurities; The compounding agent should be dried, otherwise it is easy to agglomerate, and the mixing can not be evenly dispersed! ”

"We don't understand this, can you put it simply?" Engineer Zhong said. He used the soup as an analogy, I want to refer to the process of heating and melting, which must be stirred constantly to facilitate the penetration of various ingredients, which means that when heating and melting, evaporating water and filtering impurities, it is necessary to fully stir! It must be like this! The technical section chief jumped up happily, and got busy with a few of his subordinates, and put a blade-like agitator in the original heating furnace, although the size is not very matching, but it can be used!" Yes, that's it, it's easy! Next is plasticizing, where raw rubber is elastic and lacks the necessary properties (plasticity) for processing, making it difficult to process. In order to improve its plasticity, it is necessary to plastic the raw rubber; In this way, the compounding agent is easy to be evenly dispersed in the raw rubber during mixing; At the same time, it also helps to improve the permeability and molding fluidity of the rubber compound in the calendering and molding process. The process of degrading the long-chain molecules of raw rubber to form plasticity is called plasticization. There are two methods of raw rubber plastic refining: mechanical plastic refining and thermoplastic refining. Mechanical plasticizing is to degrade and shorten the long-chain rubber molecules through the mechanical extrusion and friction of the plasticizer at a temperature that is not too high, and change from a highly elastic state to a plastic state. Thermoplastic refining is to introduce hot compressed air into the raw rubber, and under the action of heat and oxygen, the degradation of long-chain molecules becomes shorter, so as to obtain plasticity" The technical section chief gushed endlessly, listening to the bangs and engineer Zhong like falling into the fog!

"What's next..." Engineer Zhong hurriedly blocked the chattering technical section chief. "Don't tell us, you just say that this kind of practice is okay?" Engineer Zhong said. "I don't know yet, you guys wait a little while, wait for this pot to come out, after I get shaped, you can take a look!" After the technical section chief finished speaking, he ran to the production line, commanded a group of workers to be busy with the operation, and after waiting for a while, the hot thermoplastic poured out, and the technical section chief ran up to ignore the unpleasant smell that was bubbling, scooped out a spoonful with a sample spoon, and took Liu Hai and Engineer Zhong to the laboratory! After arriving at the laboratory, the plasticity test was carried out immediately, and after shaping, it was cooled, and after the cooling, various tests were carried out, including high and low temperature tests, and the technical section chief happily told the two people that it was done!

"Don't worry, the drawings of the rubber parts you need are here with me, and I promise that within two days, all the rubber parts will be made into ten sets and sent to you!" As if he had discovered a new continent, the technical section chief didn't care about talking to Liu Hai at all, and threw himself in the laboratory in one breath! Engineer Zhong and Liu Hai saw that it didn't make much sense to stay, so they returned to the experimental base!

When the two returned to the base, they found Auf waiting for them at the door. "Auf! Why are you still here, it's the middle of the night! Bangs asked strangely. I'm waiting for you to say goodbye, and I'm going home tomorrow! Auve said gloomily. Why, do you think you are given less allowance? My allowance can also be given to you, and the help you give us is what we need! Engineer Zhong said anxiously. Zhong, you underestimate me! My salary back home is much more than your allowance! "I am very vague about what I say, but it must be understandable by your ingenuity, and frankly I have leaked the secret, and if I stay any longer, I will become a traitor!" "But..." Zhong Gong wanted to say something, but Auf waved his hand, "Don't say it, remember my advice, after your * success, you must buy our country's * in moderation, because you need our help too much, because one * is not cost-effective to go to our help, but after your * success, the price of our * and processing line will definitely drop, which is also very beneficial to you!" "Thank you, Auf!" Engineer Zhong said.

Auf did not break his promise, and left by train the next day. "Auf, I wish you a smooth journey, and I hope we will have the opportunity to meet again in the future!" Bangs said, holding Auf's hand. "I'll be back, friends, remember, I'm just telling you the trick of making soup, and I didn't say anything else!" Auf said. "Understood!" Bangs said with a smile.