Under the action of hydraulic power, the screw continuously squeezes downward, and strands of golden clean oil flow out from the gaps of the iron plate, flow to the oil tank below the oil press, flow out from the small opening beside the oil tank, and flow into the wooden barrel.

"It's out...it's out!"

Compared to others' calmness, all the workers in the oil mill were shocked by the scene in front of them and could not speak. They opened their eyes wide and stared at the oil flowing out, with only shock left in their expressions.

Staring at the oil press without turning his eyes, Sun Erhu didn't even dare to breathe. He had been in an oil mill as an apprentice since he was 10 years old. He was no stranger to oil pressing. Oil pressing is a job of strength and hard work. Anyone who squeezes one dragon of oil can lose two pounds.

But the clean oil that was constantly flowing out now completely subverted his understanding. He even looked at the gate rod at his feet.

Just push it, the oil comes out?

Staring at the screw that was constantly rotating under the hydraulic power, Sun Erhu murmured in incredible shock, just like others.

In fact, Song Qiyu's situation was not much better, and he was also shocked. Under the squeeze of the hydraulic screw, the four-foot-thick material tray was squeezed dry with the oil, leaving only two feet high. When the material tray could not continue to fall, Sun Erhu, who was standing by, quickly pulled down the gate rod, and the shaft disk transmission stopped immediately.

"out……"

I originally wanted to drink the name of the son Sun Erhu like in the past. As soon as I opened my mouth, I realized that I didn’t even see sweat on my body, and Yilong oil came out.

The oil that used to take two hours to make it come out, but now it will come out after drinking a sip of tea.

"This, so... the oil comes out?"

Song Qiyu looked at the wooden barrel full of oil in shock, and he even blinked his eyes deliberately. After all, the oil came out too quickly.

"It's out."

After responding casually, Shi Yiwen said to himself.

“The efficiency of a single screw machine seems to be quite high.”

This is a vertical single-screw oil press. Historically, it was not until the 1600s that a manual vertical single-screw oil press was invented. This simple-structured manual oil press was the first modern oil press and was introduced to China in the mid-to-late 19th century. Until the 21st century, it was still used in some remote areas of China.

The current vertical single-screw oil press is not manual, but with the help of hydraulic power, its working efficiency is faster. However, in just a few minutes, 400 kilograms of raw materials were squeezed.

"How much oil is squeezed out?"

Shi Yiwen asked loudly when the worker called oil.

"59 pounds and 7 taels, boss, this machine has almost 15% of the oil!"

Song Qiyu asked back amid the workers' surprise shouts.

“Are there many?”

"Well, in the past, I couldn't squeeze out half of Chengdu, but now the oil output rate has increased by almost twice."

Shi Yiwen replied with a smile.

"So much oil has been added!"

With his eyes wide open in surprise, Song Qiyu looked at Shi Yiwen and asked.

"I understand. Your machine uses the same raw materials to squeeze twice as much oil, and the cost of oil will naturally decrease. However, how can I calculate it? It is still higher than butter."

Looking at the puzzled Song Qiyu, Shi Yiwen walked to the oil barrel and said to him.

"Ziyu, look at the oil in this bucket, how is it different from ordinary oil?"

"different?"

When she walked to the edge of the bucket, Song Qiyu noticed that the oil in the bucket was darker redder than other oils.

"This is……"

Just then, the dried oil cake in the material frame was taken out. Looking at the dark brown oil cake, he wondered.

"Zhiyuan, is it that your raw material for oil pressing is not ordinary oil seeds?"

With a slight smile, Shi Yiwen spit out two words.

"Cottonseed."

"What? It's actually cotton seeds! Cotton seed oil not only produces less oil, but also takes time and effort..."

Before he finished speaking, Song Qiyu swallowed the words back. It was time-consuming and labor-intensive. The oil press made of iron lumps in front of him not only did not take time, but instead squeezed faster and produced more oil.

"In the past, cotton seed oil pressing was indeed time-consuming and labor-intensive, but with a hydraulic oil press, it not only produces a lot of oil, but also produces a quick oil. Of course, this involves a small preliminary processing process."

When he led Song Qiyu to the shed by the river, Shi Yiwen said while walking.

"There are not enough raw materials in the factory, and I am also anxious, but I can't help with the purchase of butter, so I went to the oil mill to inquire about it. The cheapest oil is cotton seed oil, because cotton seeds are almost worth a ounce, and a stone of soybeans costs 5 cents of silver, but cotton seeds are not worth a ounce. But even so, they rarely use it to squeeze oil. Do Ziyu know why?"

As a child of a businessman, Song Qiyu also knows this. Cotton seeds are by-products of cotton production and are of no use at all.

"It's not because the cottonseed oil tastes sour, but because the shell is hard and difficult to detach, the oil is too low. One hundred kilograms of cottonseed can only produce 5 kilograms of oil. After the oil mill has been exhausted for half a day, it only squeezes dozens of kilograms of oil. The raw materials are not valuable, but labor is not cheap. However, even so, cottonseed oil is the cheapest oil, but it is still more expensive than butter."

As soon as he entered the shed, Song Qiyu let out a "ah" sound. What came into his sight was four rows of things that looked similar to the dust removal bellows in the oil mill. Driven by the water shaft belt, the workers were whispering cotton seeds in the four "bellows". With the harsh "rattle" sound, the cotton seed shells kept spewing out of the box mouth, and piles of cotton seed kernels fell in the dustpan under the box.

"This is……"

“Cass remover!”

Shi Yiwen grabbed a handful of cotton seeds and said.

"Why did cotton seeds be worth a lot of waste in the past? It was because the cotton seed shell was too hard and difficult to break. The short velvet on the shell absorbed oil, so naturally no oil could be produced. Now, if the cotton seed shell was peeled off, there would naturally be more oil. As long as the shell was broken, all natural problems would be solved..."

Throwing the cotton seeds into the bag again, Shi Yiwen smiled proudly.

Although cotton seed oil was used in ancient China, cotton seed oil has not been widely used. In the final analysis, it is because of the hard shell and the short velvet on the shell. It is extremely difficult to remove the shell of cotton seeds with good elasticity and toughness. Cotton seeds were not truly used in oil pressing until the dehulling machine was invented in the mid-19th century.

The principle of the cotton seed shelling machine is very simple. It is a blade-type shell peeler. The core of the shell is the drum and the blade holder. When the cotton seed enters the shell peeler, the cotton seed will break the shell when the blade holder rotates and shears. When the shell falls, the cotton seed is gently blown out under the blowing of the wind leaves, and the seeds fall into the dustpan below.

However, unlike the power used by shelling machines in later generations, the hydraulic power provided by the water truck is driven here.

"This, this will remove the shell..."

Looking at the light green cotton seeds in the dustpan, Song Qiyu seemed very surprised. Just a few things turned worthless things into valuable raw materials.

"That's right, but you just put it here, don't you be afraid that others will steal your way?"

As soon as he said that, looking at Shi Yiwen who was smiling but silent, Song Qiyu said.

"I'm afraid it's already prepared. Look at its shell, it doesn't seem to be wood."

The oil press can be not confidential, but the cotton seed shelling machine cannot be kept confidential, because it directly concerns whether you can buy cotton seeds at the "garbage price". Some technologies cannot be confidential because the technology is too simple, but some technologies must be kept confidential even if they are simple. It is even for the sake of confidentiality that Shi Yiwen deliberately used thin steel plates fixed with anti-theft screws as the shell.

If outsiders want to get it, unless they spell it all away, they can move things that weigh thousands of pounds away secretly... it is not easy! What's more, there are expansion screws on and off the bracket.

Looking at Shi Yiwen who was smiling but speechless, and looking at the oil mill that had nothing to do with the Song family, Song Qiyu suddenly realized a problem.

It seems...he is getting further and further away from the Song family!

When this thought emerged in his heart, he suddenly felt that Shi Yiwen had become a little unfamiliar.

It’s not just because he has completely gotten rid of the Song family after he has this oil mill, but because he didn’t even say hello when he was doing all this.

Thinking of this, Song Qiyu's thoughts suddenly became complicated and even had some strange emotions.

But after a moment, he looked at the shelling machine and said with a smile.

"Zhiyuan, since cotton seed oil is so cheap, in my opinion, we can consider running a larger oil shop, which is a huge profit."

Song Qiyu, born in a family of merchants, immediately saw business opportunities in oil presses and shelling machines. Cottonseed oil can not only be used to light a lamp but also eat it. Such things that thousands of households cannot do without are the easiest business, and of course the profit is also extremely generous.

"There is no need for this now. The most important thing is that we need to expand the sales of soap, but we have solved the problem of raw materials. Then let's sell the goods along the river."

Shi Yiwen's refusal made Song Qiyu stunned, and he said without saying anything in surprise.
Chapter completed!