Make small hardware, pour out the product in the red sand called sand products, the advantage of this product is that the production process is simple, but there are too many problems in production, the product must be made out of the sand, more or less sand or something, the knife goes in, there are small stones in it will damage the knife, if you are lucky, the knife edge will only collapse a little bit, if you are unlucky, you will collapse a large piece, the knife to do iron is tungsten carbide cutter head, after the collapse, the gap is small, and it will take a long time to grind out the knife edge on the grinding wheel, if the whole piece of cutter head is broken, you have to change the cutter, this tungsten carbide cutter head is very expensive, you can only buy the cutter head back to weld yourselfThe cutter head is welded on the iron bar head of the square, the height of each iron bar is not very consistent, if the knife is changed, the entire center point must change, in this way, it is necessary to find the corresponding center point of the cutter head, and the following gasket is exchanged for it, which is not only time-consuming and laborious, but also consumes a lot of money.

Whenever he heard the sound of the machine tool "banging", the master would run over, frowning, his face full of unhappiness, and sighed and said, "It's collapsed again! Alas!

The main part of the faucet of iron products, the water retaining part, is completed with iron eggs, by twisting the surface of the iron egg, to connect the water, one side is a closed arc, blocking the water from passing, and the other side is punching a hole in the middle of the round egg, as long as the hole in the middle is connected, the water is connected. To make the water retaining parts in the faucet, you need to use a hook knife to boring the arc, and boring it out of the same arc as the iron egg placed inside, only in this way can the water channel be blocked and play the role of turning off the water. The inner wall inside is hollow, you can only choose the boring cutter to go in, slowly cut out the arc mouth, so that the closed surface, in order to match the arc surface of the egg out of the water, the water can not come in, there is a notch on the egg, through the notch, with a copper pillar made of the rod, the bottom of the rod is made into a bolt that coincides with the notch, inserted into the notch, by twisting the rod, drive the bolt to twist the switch, to achieve the effect of water outlet.

Under normal circumstances, the boring tool does not touch the sand and gravel, basically there is no problem, and tungsten steel is the best tool for cutting iron products. If there is sand and gravel attached to the empty wall, and the sand and gravel collide with the boring tool at high speed, the knife edge will collapse at least and the large area of the knife edge will crack with it, resulting in the scrapping of the whole knife.

For this matter, Gong Xuanqun was very troubled, and as a last resort, he had to ask each household to sift through the red sand with a sieve, and select the gravel and iron sand in the red sand. It's better to do this, but after a while, irreversible things still happen, and knife breakdowns have become commonplace, and they have become a defect that can be helped. Originally, the profit of iron products is small, coupled with the continuous damage of the tool, the expensive tungsten carbide cutter head is expensive, and the product made is traded, and the cost can not earn a few copper plates.

At first, everyone thought that the technology was immature and had no opinions, but after a few months, it was like this, which made the iron producers complain, and even suspected that the technology brought back by Han Sanjiang was just something to toss people, and there was nothing profitable.

Han Sanjiang also realized this problem, so the four-person group gathered together for a meeting to discuss countermeasures, Han Sanjiang was a little frustrated, and said to everyone: "Jiang Yuanqiao, Mo Damin, Gong Xuanqun, what do you think is the problem with our iron products?"

Gong Xuanqun frowned and said: "I think there may be a problem with the furnace water, the molten iron poured out is not ideal, a word is not pure, there are many small particles in it, the culprit is basically those small molten iron, stuck to the iron wall, eat tightly, you can't knock it off, the boring knife will collapse as soon as it goes, you see!" As he spoke, he took out a faucet and handed it over to Han Sanjiang to see.

Han Sanjiang took the faucet handed over, and looked at the inner wall inside, it didn't matter, he found that there were three iron beans as irregular as water droplets attached to it, and he couldn't buckle it with his fingers, so he had to use a chisel to chisel it down, and found that if the chisel was small, it couldn't be chiseled. Han Sanjiang's eyes widened suddenly, and he looked at everyone, not knowing what to say. He couldn't find the real reason for it, and he ran into a problem.

Jiang Yuanqiao came over and looked at it, thought about it and said: "At the beginning, we didn't find these problems, the molten iron is still the molten iron, and there is no problem with the industrial salt in the furnace that should be placed, if there is a problem, there will be a problem in Mu Sanduo's copper furnace a long time ago." There is no problem with this copper furnace, and there will be no problem with the iron furnace, but there are some lead blocks and some other trace powders in the copper furnace, and nothing has happened, so there is nothing wrong with the situation of the iron furnace?"

Gong Xuanqun frowned and asked, "There is nothing wrong with the iron furnace, but there is a problem with the red sand?" The red sand we shipped back was carefully inspected, and no gravel or anything like that was found at all!"

Mo Damin's head turned sharply, constantly reviewing, there was no major problem in the first week or two, two weeks later, the problem continued to emerge, is this red sand after high temperature, there will be problems, so that the molten iron solidification defects, the molten iron burst when it solidifies instantly, and the burst molten iron particles stick to the inner wall of the product. So he said: "I think that after a period of time, that is, after high-temperature calcination, the density of the sand has changed, and the air permeability is not as good as before, so it causes the air flow to rotate and produce bursting water droplets, and then when the sand cools rapidly, the molten iron that bursts out is adsorbed to the inner wall that is about to solidify again, forming a process like today." ”

Mo Damin's words immediately made Han Sanjiang, Jiang Yuanqiao, and Gong Xuanqun fall into deep thought, none of the three spoke, they neither raised questions, nor denied his views. The sand has been calcined and its density changes so much that it is not visible to the naked eye. It is also possible for this to happen if the air permeability of the sand changes. This question is indeed a little puzzling, but you can't tell people that this red sand will be replaced in two weeks, so expensive, shipped from Nanjing, not to mention the cost, the freight alone is a lot of money!

Han Sanjiang's mind kept flying, pacing back and forth in the conference room, and suddenly he thought of a way, so he smiled and said: "Why don't we try it, use a small bamboo skewer in the appropriate position to pour the poured sand mold, a small bamboo skewer as big as a toothpick, try to insert a few small openings in the sand mold, and test it again tomorrow to see how the effect is? If we can't solve this difficulty after inserting fine holes, then it is not that there is a problem with the red sand, but that there is a problem with our molten iron, and we have not refined the impurities!

When Jiang Yuanqiao heard that there were impurities in the molten iron that had not been refined, these words made him very angry, and retorted: "Boss, if you think that the furnace I opened is not refined clean, then well, tomorrow you go and watch it yourself, you say you can pour the molten iron, I will pour it, and I will listen to you!"

Seeing that Jiang Yuanqiao was angry, Han Sanjiang smiled a little embarrassedly, and replied: "Brother Yuanqiao, I didn't mean that, I mean if, if, even if? Besides, if you clean it up, you can't guarantee that a few of your apprentices will be as serious as you!

When Jiang Yuanqiao heard this, he was even more unhappy, and shouted angrily: "Han Sanjiang, let me tell you, every apprentice I choose is very attentive, not like your apprentice Liu Chunming, who is a hanger, when he sees a beautiful woman passing by the door, he comes out to talk, and after studying for a few months, he can't operate it alone! Hmph, you are embarrassed to say me, you look at Zhou Yuhong, Lu Jianmin, Niu Mingming, Zhu Xianjun, Shi Yunsheng, all of them are not good hands, even if the beautiful girl is around, she will not be separated, take a look at it more, what kind of master we are, what kind of apprentice we are!"

Han Sanjiang couldn't help but say: "Jiang Yuanqiao, you all know that Liu Chunming is going to be an apprentice with Gong Xuanqun, and he came back after two weeks, saying that Old Gong is too torturous, he can't bear it, so he runs to me with a dead face, I don't accept him, that guy, it's annoying every day, he washes for me and cooks for me, I really haven't broken it, just let him do it, but I don't want to accept him as an apprentice at all!"

Gong Xuanqun smiled, and said: "Liu Chunming's guy is a slippery person, I will see it after a few days, I deliberately rectified him, everyone got off work, I asked him to work overtime, I didn't do it, just guarded him, stayed up late at night every day, I didn't expect him to be unbearable after two weeks, he ran away, I didn't expect to run to the boss you, hehehehe·····"