"Hehe, I called you an hour ago, the one who wants to buy the injection molding machine, my name is Zhou Jianhua." Zhou Jianhua replied.

"Oh! Hehe...... I'm sorry to let you find here......" Section Chief Chen said with a wry smile, and then pointed to the chair next to him:

"Come, Comrade Xiao Zhou, sit here!"

After Section Chief Chen finished speaking, he went to the teacup rack in the conference room to take a cup, rinsed it with boiling water, rushed the tea leaves and placed them in front of Zhou Jianhua, stared at Zhou Jianhua a few times and asked:

"Comrade Xiao Zhou, you are very young! What unit are you from? ”

"I am from the Jianhua Electromechanical Equipment Service Department in Jiancheng County. Zhou Jianhua replied with a smile.

"...... the Electromechanical Equipment Service Department?" Section Chief Chen glanced at the person next to him and asked hesitantly:

"What kind of services do you all do?"

"Do mechanical and electrical equipment maintenance, transformation or something." Zhou Jianhua replied, and suddenly couldn't help but smile and asked:

"What? Do you need service? ”

"Uh...... Are you here to buy a machine, or are you here to find business? Section Chief Chen asked a little depressedly.

"If you buy the machine, you can also find business, there is no contradiction!" Zhou Jianhua said deliberately.

"That'...... All right...... Tell me what kind of injection molding machine you want to buy, and what will it be used for? ”

"Do you have a wide range of injection molding machine models?" Zhou Jianhua asked in a slightly teasing tone.

"Injection molding machine, we currently only have one model ...... for the time being," Section Chief Chen replied in a tangled manner:

"Of course, we have a series of products, such as a big old machine tool manufacturer...... There will be follow-up models soon......"

"Huh...... Can you show me the information of this model? Zhou Jianhua asked.

"Uh...... All right...... Please sit here for a while, and I'll give them a call. Hehe......" Section Chief Chen smiled awkwardly. Then he turned to the man beside him and said:

"Section Chief Zeng. Please accompany him first. I'll come right over. ”

"Good!" Section Chief Zeng smiled and nodded in agreement.

"This is Section Chief Zeng of our technical department, you can talk first......" Section Chief Chen stood up and walked out while introducing Zhou Jianhua.

"Hello Section Chief Zeng, hehe......" Zhou Jianhua greeted with a smile:

"I just came from the supply and marketing department, and I saw that many of your customers reported that your injection molding machine is always broken, is there any circuit problem?"

"Huh...... It's just a little problem......" Section Chief Zeng's white and slightly chubby face showed a hint of hesitation, and then replied lightly:

"There is nothing wrong with normal production, but some companies buy our equipment but do not operate and maintain it according to the specifications. If the equipment is not well maintained, can it not be broken? Occasionally, it is normal for individual components to be broken, and it is good to replace them if they are broken. Even if it's a simple light bulb, you have to replace it after a long time. ”

"It doesn't seem as simple as you say, does it?" Zhou Jianhua smiled and said:

"If it's just a matter of use and maintenance, I'm afraid Section Chief Chen doesn't have to hide here, right? Since so many people have come to report equipment problems, and they are all only coming for this injection molding machine, I'm afraid it's not a small problem you said, right? ”

"It's a small problem!" Section Chief Zeng replied with a little unhappiness:

"They came to reflect those equipment problems. Every time, a few electronic components are broken, and it is good to simply replace them. Not a big deal......"

"Can't a machine tool factory as big as yours buy a component with better quality and stable performance?" Zhou Jianhua asked pretending to be puzzled.

"Actually, the quality of our components is very good, but this ......" Section Chief Zeng stopped talking, muttered for a long time, and finally shook his head and disappeared, looking restless.

Zhou Jianhua saw that Section Chief Zeng was reluctant to say more, so he thought that he would forget it, and he would wait for the information to come over later.

Section Chief Chen really came back soon, and said to Zhou Jianhua with a smile: "Comrade Xiao Zhou, the information will be sent over soon!" Just wait a little bit, hehe......"

"It's okay, it's okay to wait." Zhou Jianhua replied with a smile.

"Section Chief Chen, you talk, I'll go first." Section Chief Zeng saw that Section Chief Chen had returned, so he withdrew.

"Oh! You're busy first, we'll talk next time! Hehe......" Section Chief Chen replied with a smile.

Immediately afterwards, a young man walked in briskly from outside, handed a stack of materials to Section Chief Chen, and hurriedly walked out. Section Chief Chen handed the information to Zhou Jianhua:

"The information is here, you can take a look first."

Zhou Jianhua flipped through the information, first understood the injection volume, injection rate, injection pressure, mold opening stroke and other important parameters of this injection molding machine, and felt that from the listed data, these equipment parameters can meet their current needs, so he scanned the circuit diagram and found that the control circuit part of the injection molding machine is all analog circuits.

Because in the injection molding production process, plastic melting, injection, cooling and demoulding and other processes are completed on an injection molding machine, so the various production parameters that need to be controlled are very many, so the various sensors and control devices that are required are also many, and the transmission structure of the injection molding machine is relatively complex, and each process is completed in one go on the injection molding machine, and it also needs to be able to be accurately linked, therefore, the control circuit of the injection molding machine is much more complex than the general lathe.

This injection molding machine only relies on the analog circuit to realize the control function, and the control accuracy can not reach the higher requirements, and, because there are many discrete components, the circuit is complex, the electrical noise interference will also be very large, and this electrical noise interference will have a very big impact on the stability of the analog circuit, but the measurement of these sensor feedback data and the output accuracy of the control circuit completely depend on the stability of the whole circuit including discrete components.

Although in the control circuit of this injection molding machine, some closed-loop control circuits have been used to improve the accuracy of input and output signals, so as to improve the response speed of the control system and enhance its anti-interference, so as to improve the working accuracy of the whole equipment system in this way, but this analog circuit with closed-loop feedback inevitably causes oscillation fluctuations in the whole system because of the signal oscillation of the closed-loop circuit, and causes a large current impact to the individual circuit units and components of the control system. Even beyond the range it can bear, resulting in damage to the components.

After Zhou Jianhua roughly looked at the circuit diagram of this injection molding machine, he raised his head and asked: "Section Chief Chen, those people who have used the machine in your factory below have reported that the machine is often broken, what is going on?" ”

"Oh...... They are indeed telling the truth...... The injection molding machine is a new product of our factory, which has not been produced before, and our factory has been engaged in it for nearly 2 years, and it was finalized and began mass production in the second half of last year. Section Chief Chen frowned and replied:

"To say that in the past two years, our factory technicians have made a lot of efforts on this equipment, from the perspective of technical application level, our product should be regarded as upstream in similar products in China, and we also intend to continue to launch other specifications of a series of products on the basis of this product in the future, but I didn't expect that just over two months, there were so many problems, and basically the same problem. The technicians of our factory have been trying to solve this problem for more than a month. Before you came just now, I was talking to Section Chief Zeng about this. ”

"Since there is a problem with the product, you should agree to return it." Zhou Jianhua said disappreliantly:

"Not only do you not return them now, but you also ask me to come over to negotiate, isn't this a trick for customers?"

"Hehe, it's not what you say." Section Chief Chen explained:

"If I were going to hurt you, I wouldn't have told you this. We are a veteran state-owned factory, how can we do things that harm other factory brothers, and if we want to do this, the higher-level leaders will not be able to dismiss our factory director? The problem is, we all know that this product is only a little problem in the circuit part, originally wanted to find out the problem as soon as possible, and solve it completely, a month ago when the problem was just discovered, the technical department said that it could be solved quickly, so we did not agree to return it, but I don't know why, a month has passed, and the technical department still has not been able to solve it. ”

Section Chief Chen paused and continued:

"Every time I ask Section Chief Zeng how long it will take to get it done, he says it's going to be soon, just another week, but now a few weeks have passed, and I can't help it! A month ago, I had asked the factory director to suspend the sale of this injection molding machine, and the leader agreed with my suggestion at that time, but the leader also said that the temporary non-refund of the sold ones should be sent to them as soon as possible, and then the technical department would completely solve the problem and then replace the control circuit with them, so as not to affect the reputation of our factory. ”

Before 85 years, the state was not allowed to register private companies, only allowed the registration of "self-employed" individuals in the economy, and this "self-employed" could only register in the service industry, repair industry or handicraft industry, and the purchase of machinery and equipment for production was basically still state-owned enterprises.

Therefore, Section Chief Chen's words are also true. In this era, there is no such trickery between state-owned enterprises, and it is still an era when government and enterprises are not separated, and enterprise leaders are also at the administrative level, if you mess around, you will definitely be punished by your superiors, and then do you want to continue to play happily in the officialdom? No one would do such a stupid thing.

At this time, Zhou Jianhua, as a "self-employed" to buy machinery and equipment for production, also took a certain policy risk, but fortunately, Zhou Jianhua already knew the future direction of national policy, as long as he did not go too far and brazenly to seize the raw materials and markets of state-owned enterprises, and did not "disrupt the economic order", there would be no big problem. (To be continued......)