Chapter 365: Immortal Party A
Gao Zhendong didn’t know what to say for a while. His understanding of this thing was limited to what he saw in the book, but he still understood what he knew All explained to Mr. Xiang.
"Mr. Xiang, it's not like that. The difference between twin-screw and single-screw is huge."
Anyway, this thing already exists at this time, he can say whatever he wants, just ask. Read a lot, remember it firmly, and use it well. As for whether many detailed techniques are available at this time, where can people in China get verification?
One of the major differences between practical twin-screws and single-screws is that the power and mechanism of material advancement are completely different from those of single-screws.
The material in the single screw seems to be pushed by the screw groove. In fact, the implicit requirement is that the friction between the material and the screw groove is greater than the friction between the material and the inner wall of the machine.
In this case, the extrusion speed of the material does not change linearly with the screw speed. The most disgusting thing is that when the screw speed remains unchanged, due to changes in other conditions, the extrusion of the material The speed will also change.
This leads to a problem. Generally speaking, the extrusion speed of materials in this kind of machine is not very controllable. In other words, the controllability is poor and the controllable window is not large.
At the same time, since the single screw groove is continuous, the material will form a long molten pool and two continuous spiral strips of solid bed in the entire screw groove. In this way, what is uniform heating and mixing? Naturally, there is no way to talk about it. When the solid bed disappears and all the materials form a molten pool, it will be over soon.
Twin screws are different.
There is a kind of non-meshing twin screw. This thing is quite similar to what Mr. Xiang said. It is really almost doubled as a single screw. Basically, this product has the shortcomings of a single screw.
But when the twin screws use meshing twin screws, the situation changes drastically.
To put it simply, the intermeshing twin-screw divides the material into small, disconnected pieces through the ingenious meshing of the threads on the two parallel screws, and the materials are forcibly transported forward as the screw rotates. The power of its transportation does not rely on friction, but forced transportation.
If you really can’t figure it out, you can imagine it is feeding materials forward one ladle at a time.
That is, dividing continuous materials into parts. This can be regarded as an alternative kind of indecision, quantum mechanics.
This brings many benefits. The extrusion speed of the material can be controlled at once. The faster the rotation, the faster the extrusion and the speed are controllable.
And this small piece of material is strictly fixed, which also makes the heating uniform. It is even possible to directly design the mixing screw for mixing, using different screw combinations to provide shear force, so that the material can be heated evenly. It is very considerate to obtain a high mixing degree state.
Of course, it is not without its shortcomings. The conveying process is throttling, which will cause pulsations in the extrusion pressure. However, the good news is that this situation can be weakened or even eliminated through reasonable design.
Gao Zhendong is not clear about the details and in-depth theories, but he can still explain the superficial things clearly, and he also remembers a lot of relevant superficial knowledge. This is enough for Mr. Xiang and the others. They are Lack of ideas, but not bad at brains.
After all, Mr. Xiang specializes in this. Although he is not responsible for the extruder itself, he can still analyze the principles. After listening to Gao Zhendong’s introduction, he pondered for a long time. Director Gao said it seemed very That makes sense.
At least in principle, I haven't found any fault. Give it a try, maybe it will work.
He knew very well that if Director Gao was right, once this thing was developed, it would not only be used in the processing of this ABS bobbin, but could also be used as a general processing technology for other materials. processing.
It’s worth doing, not just for Director Gao’s project.
Mr. Xiang thought about it for a long time and felt that there was nothing wrong with it. He was in a very good mood. It must be Director Gao who has a wide range of knowledge and the method he came up with was even better than someone like himself who specializes in this.
"Director Gao, I will go find the comrade who makes the extruder and ask him to try it. If it is true as you said, you have inadvertently helped us solve a big problem. Thank you very much. ”
Apart from being happy, there is also a hint of guilt. This is like starting a project. If you can't solve it yourself, Party A has to personally take action.
Party A is a fairy Party, and he does take advantage, but his face is somewhat red.
Gao Zhendong smiled and said: "I hope it can be solved. We are basically short of this now. By the way, the screws, screws, barrels and other parts of this thing are best made of corrosion-resistant nickel-based alloys. "Well, the working temperature is probably not low, and the corrosion resistance of ordinary materials will drop sharply under high temperatures."
As for Gao Zhendong's words, Mr. Xiang has no doubt that this issue can go back to what Director Gao is good at. field.
In this case, let's use urea steel first. At least in his hands, this is the steel with the best corrosion resistance known.
Okay, back again.
Before hanging up the phone, Mr. Xiang still gave himself a moment of respect: "Director Gao, although the barrel is not good yet, there is no problem with the sight. I have processed hundreds of sets and will soon pass the specialized I will send it to you through the channel. By the way, I will also send a few qualified barrels to you. At least I will support you in starting the experiment." Gao Zhendong heard that, that's fine, at least get the sight. Tried it first. There was no need to send it to himself. He asked Mr. Xiang to send it directly to Changjian Machinery Factory, and then he would just call Mr. Luo and explain. After hanging up the phone, Mr. Xiang immediately ran to find the comrade in charge of the extruder and repeated Gao Zhendong's reminder to him.
After hearing what Mr. Xiang said, this comrade first thought blankly for a long time, and then showed an expression of surprise and grinned.
"It seems that the functions of mixing, reaction, exhaust and self-cleaning of this thing are better than those of a single screw. Simply changing the idea has completely changed the working principle of the screw extruder and solved the problem of single screw extruders." There are many defects in the extruder.”
After all, the other party is specialized in this. After turning around in his head, he thought about the whole thing and saw more. Places that cannot be reached.
Looking at his expression, Mr. Xiang knew that there should be no problem.
“Looking at you like this, is this suggestion feasible?”
The other party suddenly held Mr. Xiang’s hand: “Lao Xiang, you must make the suggestion to Mr. Xiang for me. Thank you to the comrade for this plan. His simple words have solved a big problem! Why can’t my mind think of this? Oh, I still have to learn, I still have to learn.”
Mr. Xiang smiled and said: "Thank you, thank you. Do you think this can be done?"
"I will immediately ask the superiors to set up a project. This thing can not only be used by you, but also by others." Don’t worry, I didn’t think of this way, so I can’t solve it. But if someone points out the way and I can’t go through it, then I’m really useless.”
I am a mechanical person. , he naturally has his own judgment about his major, so Mr. Xiang was relieved, but he still warned: "Then you write the report quickly, and I will sign it with you. By the way, don't forget to put the person's name in it. You must I don’t know how long you’ll be scratching your head if you don’t say this.”
“Well, of course! By the way, what is this comrade’s name and what unit is he from? I can write it in the report. Ah."
Huh? Oops!
This question suddenly silenced Mr. Xiang. I seem to be unable to tell you the name of this comrade.
"Ah, this, ah, this, that, etc., you can just write an outsourcing expert. I really can't tell you the name of this person right now. This is such a big deal."
The comrade who worked on the extruder was not a fool either. Looking at Mr. Xiang like this, he probably knew the reason and started laughing. Mr. Xiang himself couldn’t hold it back, and the two of them laughed together like a pair of Maitreya Buddhas.
——
Somewhere in Beijing, the Bureau of Standards and Regulations is currently meeting to internally review an application for the preparation of national standards.
The Standards and Regulations Bureau, the full name of the Standards and Regulations Bureau, is affiliated to the National Technical Committee (National Technical Committee).
These days, there are not many comrades doing this. The first serious national standardization work conference was held in 1963. From the establishment of the Standards and Regulations Bureau in 1957 and the release of GB1 in 1958, to As of 1966, there were only more than 1,000 standards established across the country.
That's it, a considerable part of it was only done after 1963, because the first standardization development plan of the Zhengerbajing was only formulated in April 1963, and the Standard Publishing House was also in 1963. It was established only in 2006.
As for this time in the 1960s, to be honest, it cannot be said that the standard work has nothing, at least there is not much ink. In 1958, the country promulgated the first batch of national standards, a total of 120 items. In 1960, industry standards were promulgated. The 103 items are all from the machinery industry, and the 120 national standards are all fasteners, including 7 categories of products including bolts, nuts, screws, wood screws, washers, rivets and pins.
It seems a bit tearful, the first step of our standardization work is so stumbling.
As for the rest, there are only some standards for translating Lao Maozi in the early days of the founding of the People's Republic of China.
So for the very few babies who have taken the initiative to report to the Standards and Regulations Bureau for the task of compiling national standards in this year, the Standards and Regulations Bureau also attaches great importance to them. Everyone at the meeting was present.
Another reason why they attach so much importance is that the applicant for this application has a good background and looks very reliable at first glance.
The 17th Ministry of Machinery, the 12th Ministry of Machinery, and the Postal and Communications Commission jointly declared!
To be honest, even if these units declare individually, they are heavy enough, let alone a joint declaration.
As a subordinate unit of the National Technical Committee, the Bureau of Standards and Regulations is very aware of the outstanding performance of the 17th and 12th Machinery Departments in science and technology in the past six months.
The combination of the two of them, plus a Postal and Communications Commission that controls national communications, makes this a super heavyweight.
What was placed in front of them was the national standard preparation application document regarding the "Software Development Document Preparation Guide". The 12th Ministry of Machinery and the Postal and Communications Commission moved very quickly.
(End of this chapter)