The crusher can finally be put into use successfully.

Connect the waterwheel and the pulverizer on the river with a speed-increasing gear, and place an ordinary millstone next to it. In comparison, the millstone is as big as a table, and the pulverizer is only as big as a barrel.

Put the soaked soybeans into it and start processing at the same time.

At the beginning, Shimo was in the lead. At half an hour, Shimo was still in the lead. At two hours, the crusher finally took over.

After two hours of long processing, the soybeans were smashed into crumbs by a sharp knife. A bucket of water was poured down, and the soybean milk was stirred with a stick.

From an efficiency point of view, the efficiency of crusher processing soy milk is generally higher than that of stone mill.

However, the processing depth of the crusher is far from enough.

In Li Mengxi's impression, the soy milk machine breaks the beans into fine pieces as fine as bean flour. But when you grab a handful of bean dregs in the bucket and look at it, you can see that the largest pieces of bean dregs are as big as rice grains.

The pulp yield of soy milk is probably related to the degree of grinding. Obviously, the finer the beans are crushed, the more pulp will be produced.

It's a bit useless now. The crusher is indeed very efficient and can indeed replace stone grinding, but it is a waste of beans.

This is either to perform secondary processing and use the bean dregs for other purposes, or to improve the crusher. In fact, both methods are acceptable.

The bean dregs can be fed to cattle or made into food, whatever.

The crusher can be used as a makeshift machine, but Li Mengxi never thought it would stop there.

The waterwheel and gears have achieved temporary results and can be used without any improvement for the time being.

Li Mengxi turned around and invested in improving the crusher.

Still use the controlled variable method, a crusher system, the variables include beans, water, barrels, blades, cutter shafts, chassis, all variables, all factors, that's all.

As for the variable of beans, the longer the beans are soaked in water, the easier they are to crush and the higher the pulp extraction rate. This is probably the case. It seems to be the same as well. However, it sometimes feels wrong. What if it is not the case? What if the beans are not soaked?

The longer it is left, the easier it is to crush. What if the beans are slightly harder and more susceptible to stress and easier to crush. Therefore, a large number of tests must be carried out.

Regarding the factor of water, I don’t know whether the beans will be crushed faster by adding water to the beans, or without adding water, or by adding a small amount of water, or by adding a large amount of water.

As for barrels, the variable of barrels can be subdivided into material, shape, height, thickness, etc. The shape of the barrel probably does not affect the efficiency of the grinder. However, the feeling may not be right, and the data will never be wrong.

Still have to try.

The most complex and important structure of the pulverizer is the blade. Its complexity is comparable to that of a waterwheel blade. The waterwheel blade uses a clever method and seeks bionics. The same can be said for the pulverizer blade.

The first generation blade uses the shape of a mantis blade arm and has a toothed edge that looks like a knife but not a knife, like a saw but not a saw. This kind of mantis blade is okay to use, and I found a better knife shape for the time being, so I will use it for the time being.

Tool factors are complex. In addition to the blade itself, there are also blade installation angles and blade arrangement methods. The previous installation angle was an upward lotus-shaped shape, but this may not be the best angle.

When it comes to the tool angle factor, there are too many variables. If it is only calculated in right angles, one variable is three degrees, which is thirty variables. If it is calculated in one hundred and eighty degrees, there are sixty variables. If it is three hundred and sixty degrees, there are too many variables.

If all angles of the blade are upward, downward, left or right, then there are 120 variables. For each of these 120 angle variables, at least 300 samples will be set, and the prototype will have 36,000 samples.

tower.

This is just the angle variable, plus the arrangement method, the blades are better arranged upright, diagonally, clockwise, counterclockwise, these are many variables.

There was another huge amount of testing, and Li Mengxi was very motivated.

——

There are about a dozen repaired small waterways in Julu. The repaired waterways have stable hydraulic power and small errors, which just facilitates testing.

Multiple tests were conducted simultaneously. The first test was to test how long the soybeans were soaked for to make them easier to crush.

The soybeans have been soaked. Li Mengxi first led someone to make a crusher. For testing purposes, the crusher must be exactly the same. It needs to have exactly the same cutter, exactly the same speed, and the same crushing barrel. Everything must be the same.

More than 300 knives were manufactured in batches using the casting method. After the knives were polished and edged, they encountered a small problem when they wanted to test the sharpness. The sharpness was too subtle to be quantified intuitively, so Li Mengxi had to put a lot of thought into the design.

How to test sharpness.

To test the sharpness, you must first get rid of human power, which fluctuates too much and is not accurate enough.

The test method for the sharpness of a knife is to place the knife upright on a stack of tissue paper, put a weight of the same weight on the back of the knife, and rely on the gravity of the weight to force the blade to cut downwards.

The number of layers is used to determine the sharpness.

According to this method, put the polished knives for a try. Some knives can crush three pieces of tissue paper, and some cannot cut even one. The difference in sharpness is obvious.

In this way, the sharpness gradient of the tool is immediately distinguished.

Although the sharpness determined by paper is still not accurate enough, the error has been greatly eliminated.

There are more than 300 cast knives, and only about 100 knives with similar sharpness can be selected. A pulverizer requires at least several blades, and more than 100 knives can be used to make dozens of pulverizers, and for

It is ensured that the knives are at the same sharpness at the beginning of each round of testing. New knives must be replaced for each round of testing, so it is obvious that 300 knives are too few.

There is no other way but to simplify the test scale.

Li Mengxi moved a sundial to the river to prepare for timekeeping.

The sun was shining brightly, and when the shadow of the sundial reached the fourth quarter of the hour, Li Mengxi immediately ordered the test to begin.

In the first round, put the beans that have been soaked for a long time into the crusher, take five kilograms of beans, drain the water, and put the beans into the crusher. Driven by the water wheel, the crusher spins very fast.

A long time passed, and when an hour later, the sundial just passed the hour mark, the destruction stopped.

The first round of testing is over.

When the record was shattered, Li Mengxi felt troubled again.

How do you measure the degree of crushing? How can you compare whether the particles are a little bit broken and a little bit complete?

Use a ruler to measure? Even if you use a ruler to measure, you can't measure it at all. Even if you use a magnifying glass, you can't do it.

Li Mengxi exhausted his memories. He recalled all the physical, chemical and biological experiments during his student days. After recalling them, he could not think of a method, because in all the experiments during his student days, there was no method to measure the degree of crushing.

Li Mengxi had no choice but to ask everyone for help. He did not expect that the craftsmen would casually give the answer to this question that puzzled him.

What the craftsman said is to fill a bucket with a full bucket, and then weigh it. Whichever bucket is heavy will break.

Damn it, the degree of crushing is related to the weight.

After thinking deeply, Li Mengxi realized the brilliance of this method.

It's not weight, it's density.

For example, a bottle can only hold ten pebbles, but if the pebbles are broken into pieces, the whole bottle can hold fifteen pebbles. If the pebbles are broken into smaller pieces and the pebbles are broken into sand, then the bottle

It can hold eighteen stones.

clever.

The higher the crushing degree, the more it can be accommodated in the container and the heavier the weight will be.

In this way, the degree of crushing can be judged.

Li Mengxi was really taught a lesson by the craftsmen.

The craftsmen must have sufficient experience in using the liter bucket on daily basis. It must be that one liter of wheat is ground into powder and it must not be filled with one liter. The wheat flour must be heavier than the wheat after one liter is filled. For the craftsmen,

, the ground things are packed less, but weighed heavily. This must be a common phenomenon. Therefore, craftsmen with rich life experience can explain the method of judging the degree of grinding of soybeans.

Li Mengxi issued a military coupon of three hundred kilograms of grain on the spot to reward the craftsman who proposed the method. The craftsman accepted the military coupon with a smile on his face. Seeing this, the people around him only regretted not speaking earlier.

Every reward of money and food is an incentive to wisdom, and every incentive will make everyone more willing to think about problems.

It's the same this time. These craftsmen have received incentives and will definitely participate more actively in solving problems next time.

Li Mengxi began to measure [the degree of crushing of soybeans]. In scientific experiments, there is an amplification method, which is to enlarge the test phenomenon for easier observation.

At this time, Li Mengxi decided to get a slender container for measurement.

For a more slender container, the scale of one milliliter of capacity is as long as a length, while for the thicker container, the scale of one milliliter is as short as a fingernail. This makes the accuracy of the two containers completely different.

Li Mengxi hurried back to the city and ordered the carpenters to make a wooden tube as quickly as possible. The requirements were that the wooden tube should be as thick as an egg and five feet long, as thick as the top and bottom, and smooth inside without any water trapped inside.

Making wooden tubes is not difficult, but Li Mengxi's requirements are too tight. If the craftsman camp had not had enough manpower and raw materials, there would be no way to complete the task quickly.

Li Mengxi hurried back with the wooden tube and returned to the river. He filled the bamboo tube completely with bean dregs, then shook it vigorously for a while, and then poured out all the bean dregs.

This step is to reduce the error.

Because there is no water or bean residue left in a new wooden tube when it is used for the first time. The first weighing will not be affected by the residue. Every subsequent weighing will be affected by the residue. Therefore, the formal measurement is actually not affected by the residue.

It should start from the second time.

Fill the entire wooden tube with bean dregs and shake vigorously to make the bean sprouts settle as evenly as possible.

Wait for the bean dregs to sink a little, fill it up again, and then shake it vigorously until it stops sinking anymore, seal the wooden tube, weigh it, and record the weight.

This is the first weight.

The next day, on the second day, I took five kilograms of soybeans that had been soaked for a day and night, replaced the blades in the grinder with new ones, and waited until the sun reached the fourth quarter of the hour to start the grinder.

When the crushing time is exactly one hour, stop, collect the bean dregs, fill the wooden tube, and weigh again.

Compared to the day before, the weight was about four cents more.

On the third day, the soybeans have been soaked for two days and two nights. It is time to replace the third batch of new blades, which will start at 4:00 and end at 4:00.

The bean dregs are put into a tube and weighed. A full tube of bean dregs weighs another two cents.

According to this, the more broken the beans are, the heavier they are. The heavier the beans, the higher the degree of crushing. According to this known principle, it has been successfully measured that the softer the soaked soybeans are, the easier they are to break. This is the same as the previous guess.

.
To be continued...