The latest progress of a particular research was a question that puzzled many researchers before the Internet age. Pen & Fun & Pavilion www.biquge.info especially those niche topics, in addition to the contact between researchers, can only be solved by looking through newly published journals.

In the 80s, this problem became more difficult. Because China has been practicing politics in seclusion for more than 10 years, apart from Marx's theory, what new discoveries have been made in foreign countries is no longer something that can be solved by going through the periodicals published in the last few months. On the other hand, it is difficult to confirm whether there are previous studies in China due to the disconnection of researchers and the lack of data.

Therefore, when Yang Rui said that he saw a journal that had a solution to the problem of canned food protrusions, Duan Hua believed it a little.

However, Yang Rui was only a high school student after all, Duan Hua only straightened his waist slightly, and asked calmly and seriously: "What are the four methods, you can talk about it." ”

Rui's mother and Rui's father also looked at her son curiously.

"The first way is to increase the strength of the can itself, I have the impression that it seems that it can be replaced with better tinplate?" Yang Rui deliberately said a little vaguely.

Duan Hua nodded unexpectedly: "You can exchange 90p tinplate for 80p tinplate." You can also use imported tinplate, and Japan's adjustment system is the best, and it is even more powerful than the Americans. However, a small factory like ours has no foreign exchange. ”

Speaking of the last sentence, Duan Hua picked up his wine glass a little self-deprecatingly.

In 82 years, foreign exchange was so expensive that the central government had to make careful calculations when traveling, and county-level institutions could not think of using foreign exchange when they were idle.

Yang Feng knew more things, so he also picked up his wine glass, took the initiative to touch him, and said, "Doesn't your factory export white strip meat to Europe? I heard that the sales are not bad, so there is always some foreign exchange to keep." ”

"The retention is also reserved for the main factory, how can our branch factory get the index. It's also impossible to change to a domestic 90p, and it's not a skill to spend more money, besides, domestic tinplate is also very nervous. Duan Hua said very naturally, Xibao Meat Factory was established in the 60s, and now, it is a series of meat joint factories integrating slaughtering, refrigerated storage and transportation, and cooked meat products. The canneyard is just starting to build, and the revenue is good, but it is only a small character.

This kind of struggle for power and profit in the big family of state-owned enterprises is not accessible to outsiders.

Yang Rui does not think that the problem can be solved with better materials, in terms of the domestic economic situation, new product development is to pick up low cost, not to mention the correction of old products.

Like when he was a graduate student, facing corporate customers, Yang Rui smiled slightly and said, "Then I will continue to talk about the second point." ”

"Oh, you say. Duan Hua has become invisibly serious because of Yang Rui's changes.

"The second point is the temperature of the soup. If you control the temperature, you can slowly release the pressure difference. The data should be more than 80 degrees, how is it, it is estimated that some tests will be done. Yang Rui couldn't directly read the values in the data, so he tried to narrow down the range.

However, different production lines and equipment are naturally suitable for different temperatures, and the factory always needs to debug it itself. This is also the significance of the existence of the manufacturer's after-sales service and the technical department of the factory.

Duan Hua scratched his head: "Which temperature is better to test...... It's a bit difficult, there is a lack of talents in the factory, the main factory is mainly slaughtered and divided, and there is no suitable candidate. ”

Xibao Canning Factory is a newly built factory of Xibao Meat Factory, which means that it does not have many old people to support the scene, and college students after the resumption of the college entrance examination will not be able to take its turn, Duan Hua is already at the highest level.

Therefore, even if an ordinary graduate student in later generations can do a simple comparative test, the Xibao canning factory is a rat pulling a turtle, and there is nowhere to start.

Yang Rui shook his head and said: "The third is to rely on pre-cooking, as well as canning adjustment, to solve the problem of protrusion as much as possible, this should be combined with other methods." The pre-cooking is sufficient, the weight of the canning is reasonable, and so on. ”

"We do this, but the time of pre-cooking, the degree of canning, is really difficult to determine. Duan Hua had completely entered the state at this time, and really began to discuss technology.

"The pre-cooking time and the degree of canning can be adjusted to a certain extent, at least within a certain range, and it should be linked to the temperature of the soup and tested. ”

"That's right...... I'll figure out how to do this when I go back. ”

Yang Rui's parents looked left and right, and always felt that something was wrong with the scene in front of them.

Yang Rui was quite satisfied, took a bite of the dish, and said with a smile: "The fourth way to improve the yield rate is the best, before that, let me ask, is the sterilization pot used for sterilization in the factory?"

"Yes, GT7C3 type, we also call it sterilization tank. ”

"Vertical?"

"Yes. Freshly packed cans are put in, sterilized at high temperatures, then sprayed with water to cool, and finally packed into boxes and shipped away. "Uncle doesn't mean to take the school exam now, he's completely discussing technology. He was already convinced that Yang Rui had really read the relevant papers.

Yang Rui pretended to be a memory, thought for a while, and said, "Is this type of sterilization tank cooled by spraying water from the bottom up?"

"Yes, yes. ”

Yang Rui suddenly realized: "That's right, if you want to significantly improve the yield rate, you have to replace the vertical sterilization cylinder with a horizontal sterilization cylinder." ”

"Why?"

"The book only gives the answer, not in particular detail, I thought about it myself, do you see if this is the case......" Yang Rui put on a studious middle school student and said: "If you spray water from below, the water will be stored in the lower area, and the cans below will definitely be cooled first, and the upper ones will be cooled later, right? Moreover, there is more water stored in the lower area, and the buoyancy gradually increases, and the cans above may float." ”

After all, Duan Hua had been doing it on the spot for many years, and nodded while thinking: "That's right, the cooling below is fast, and the cooling above is slow." It is indeed possible for the cans on top to float, so that the cans on top are not completely immersed in the cooling water and will cool more slowly. ”

Yang Rui continued to go deeper and said, "I remember that the book said that different temperatures will also cause pressure differences......

"Hmmm......"

"The pressure difference is the culprit of the protrusion, so this vertical sterilization tank itself will cause the protrusion, so it should be replaced. Yang Rui pushed forward slowly, and he was already sure in his heart.

The vertical sterilization cylinder will not only cause the protrusion, but also one of the main reasons for the protrusion, which is the conclusion reached by more than a dozen related papers in later generations.

The cannery currently has a yield rate of only 75%, which is closely related to this. Only by first transforming the sterilization and cooling method, and then cooperating with other small means, it is possible to achieve a higher yield.

The simple but rigorous reasoning made Duan Hua listen to it, and he thought about it motionlessly.

Rui's mother didn't understand technology, and when she saw him like this, she thought that Yang Rui had said the wrong thing, and said with a smile: "Big brother, don't think so much, eat something first, the dishes are cold." ”

Duan Hua lowered his head and didn't say anything.

The courtyard fell into an inexplicable silence, only the rustle of the breeze caressing the pear trees, and faintly, there seemed to be a faint fragrance coming.

"Smack. ”

Duan Hua slapped his thigh, grinning in pain, but he stood up on the table and said, "I have to go back, I'll drink here today." ”

"Hey, what's wrong?" Yang Rui's parents both stood up.

"There is a horizontal sterilization cylinder in the third workshop, they can use any of them, I changed it to try it, it was too late, I went first, I went first. Duan Hua picked up the briefcase, wanted to touch Yang Rui's head, paused, patted it on the shoulder, and said with a smile: "Yang Rui has really grown up, he has done me a great favor, and he will bring you good things next time." ”

"Is the expert still please?"

"Please, please come and do the test. As Duan Hua spoke, he ran out of the yard at the pace of a trot and headed straight for the direction of the passenger station.

……