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Li Guo returned to Guangxi with a boatload of wild rubber and began the process of making real rubber products.

This proved to be difficult, and although Li Guo studied physics and chemistry in the original space, he was only a student at the time, and he was not a panacea. Li Guo racked his brains, recalling the method of making zuò from rubber in the original time and space, and vaguely remembered something, but he couldn't remember it for a while.

If you can't think of it, you don't want to, then it's really yàn! I don't believe that you can't get rubber!

Li Guo and Song Yingxing took the students of those specialized disciplines in the hall of Xihai University and began to do real things, it's okay, anyway, there is a boatload of rubber, not afraid of waste! Besides, Turu in Malay has already started collecting rubber.

Li Guo led people to start making rubber.

In fact, raw rubber is smelted into real rubber, which requires six basic processes: plasticizing, mixing, calendering, extrusion, molding and vulcanization.

The first is the plastic refining of raw rubber, which is the process of changing raw rubber from a strong elastic state to a soft and easy to process plastic state through mechanical stress, heat, oxygen or adding some chemical reagents.

The purpose of raw rubber refining is to reduce its elasticity, increase plasticity, and obtain appropriate fluidity to meet the requirements of mixing, calendering, extrusion, molding, and vulcanization.

Mastering the appropriate plasticity of plastic refining is crucial to the processing of rubber products and the quality of finished products. On the premise of meeting the requirements of the processing process, the plasticity should be reduced as much as possible. With the emergence of constant viscosity rubber and low viscosity rubber, some rubber no longer needs to be molded and directly mixed.

In the rubber industry, it is one of the most commonly used mechanical plastic refining methods. The main equipment used is an open mixer, a closed mixer and a screw plasticizer.

Before mixing, raw rubber needs to be pre-baked, cut, selected and broken before it can be plasticized.

Second, mixing refers to the process of evenly mixing various compounding agents into the raw rubber type on the rubber mixer.

The quality of the compounding has a decisive influence on the further processing of the compound and the quality of the finished product. Even if the compound is well formulated, if the mixing is not good. There will also be uneven dispersion of compounding agents, the plasticity can be too high or too low, easy to burn, frost, etc., so that the calendering, extrusion, gluing and vulcanization processes can not be carried out normally, and the performance of the product will be reduced.

The operation method is generally divided into one-stage mixing method and two-stage mixing method.

The first-stage mixing method refers to the method of completing the mixing by the internal mixer at one time, and then pressing the tablet to obtain the rubber compound, which is suitable for all natural rubber, and its feeding sequence is raw rubber - small material - reinforcing agent - filler - oil softener - discharge - cooling - sulfur and super accelerator.

Third, there is the calendering process. Fourth. It is the extrusion process. Fifth, it is the injection process. Sixth, it is the die-casting process. These processes are actually the processes for making finished products after the rubber is smelted.

Seventh, it is the vulcanization process, which is the most critical step in rubber manufacturing.

In the original time and space, the main use of natural rubber in the earliest days was only to make erasers, and later to make small rubber tubes.

Until 1839, the American inventor Charlie? Goodyear heats natural rubber and sulfur together. It is desirable to obtain a substance that remains dry and resilient at all temperatures all year round.

One day he poured rubber, sulfur and turpentine into a pot (sulfur was only used for dyeing) and accidentally spilled the mixture on the scorching stove. To his surprise, the mixture did not melt after falling into the fire, but was charred as it was. The mixture, which remains in the furnace and is not completely charred, is resilient. He peeled the spilled off the stove and realized that he had prepared the elastic rubber he wanted.

Li Guo is not a professional rubber manufacturer, and of course he does not understand these processes. He just thought, to make rubber, you have to smelt the raw rubber!

Thereupon. In an iron trough heated by fire underneath, the chopped rubber particles were put in. Prepare to wait for the rubber to melt and start stirring.

It is not easy to melt the smeltable raw rubber, and the fluidity of the raw rubber is not good, and it is often burned.

Li Guo angrily asked someone to bring two jars of wine, and while drinking wine, he was refining rubber. But no matter how you refine it, you can't refine it, and the fluidity of the raw rubber is too poor. Li Guo was angry and poured the remaining half jar of wine into the glue tank. But a strange thing happened, the raw rubber was poured into the strong liquor, and the liquidity was surprisingly good.

Li Guo didn't know that it was necessary to add turpentine or alcohol to smelt raw rubber in the original time and space. And the wine he drank was a high-grade wine made from grain, which was similar to alcohol, and a dissolving agent was added to the raw gum crookedly.

Seeing that the fluidity of the raw rubber was very good, Li Guo was very happy, but after all, manual mixing was laborious, so Li Guo ordered to make a simple mixing machine, and moved a steam engine to drive the mixer to stir.

I feel that the fire is a little fierce, add raw rubber, the temperature is down, and then add charcoal. In this way, unconsciously, the plastic refining and mixing were completed.

But the rubber is sticky after cooling, and nothing can be done.

What can I do? Li Guo remembered what additives should be added to the rubber? But what is it to add?

Li Guo was worried.

Until one day, a gunpowder boss came to report to Song Yingxing on the inventory and production of gunpowder.

The leader first asked Li Guo for a peace, and then said to Song Yingxing, "Master Song, there is a lot of gunpowder stored now, yes." In addition, there are also a lot of charcoal, nitrate, and sulfur in storage. ”

Li Guo snorted, "What did you say?" ”

Not to mention that the leader was shocked, even Song Yingxing and the people who worked together were shocked, the tiger master couldn't refine the glue, and he was really angry!

The leader didn't have to come here to report to Song Yingxing, he knew that Li Guo was here, so he deliberately came here to show his face. Hearing that Li Guo's voice was wrong, the leader's legs were weak at that time, and he hurriedly knelt down, "Master Tiger forgives, forgive sins!" ”

Li Guo picked up the leader and asked, "You are talking about sulfur?" ”

The leader didn't dare to say anything, just nodded vigorously.

Li Guo laughed and patted the leader on the shoulder, "If the rubber can be successfully refined this time, you will have a great achievement!" ”

Because, Li Guo suddenly remembered the word 'vulcanization', which is too familiar.

Li Guo ordered, "Ying Xing, add sulfur to the rubber!" ”

"Huh? Be! Song Yingxing was surprised and agreed, and secretly said to the leader who reported to him, "Get out, don't let the tiger master see it these days, didn't you hear it?" The tiger master is going to add sulfur to it. ”

The leader hurried away, and Brimstone had sent someone else to bring him, but he didn't dare to show his face.

As a result, the smelted rubber is evenly sprinkled with sulfur powder. After taking out the rubber solution and letting it cool, Li Guo was pleasantly surprised to find that the real rubber was refined.

It's just that the shape of the rubber is not good, that is the lack of mold, not a problem. It's just that the rubber is harder in some places, and softer in some places, it doesn't matter, maybe it is not stirred evenly, or the temperature is not right, in short, it must be okay to test it a few more times.

Looking at Li's uncontrollable laughter, Song Yingxing also asked a little cautiously, "Master Tiger, is this rubber?" Is that a success? Does this thing really work? ”

"Haha! Yes, it worked, this thing works! It's useful! Li Guo then laughed.

But listen, boom! There was a loud bang, and the boiler that drove the rubber mixer exploded! (To be continued......)