With such a big kiln, the bellows are too small, considering the actual situation in the tribe, Song Xuan feels that it is still a little unrealistic to make the bellows in his mind.

Although the structure of the bellows is not complicated, it is very complicated for the snake.

However, Song Xuan suddenly thought that although it was a little difficult to make a suitable bellows completely, he could try to make a skeleton, and then use animal skins to prop it up inside.

It's hard to board the perimeter tightly, but it's not so difficult if it's just a frame.

There are also many intact hides in the tribe, most of which are goats, and when catching this kind of prey that does not have too high combat power, the hunting team will be more careful, and even if they can't capture it alive, they will aim at the head and buttocks, which are harmless.

Even when peeling, it is kept as intact as possible, although it is not a big effect, but it is still good to bring back some soft hay to fill it with and make a toy.

Even some of the targets in the tribe are made in this way, and the targets produced in this way are much more vivid than the stake heads that are erected, and the height and size are more in line with the real hunting environment.

And Shi Ban designed it well, and the two picked a relatively large sheepskin, of course, if it is used to blow the wind, it must be as big as possible, but this is the first time to do it after all, if it is damaged, there are some larger animal skins to use later, even if the design is not successful, you can stop the loss in time.

Although the animal skin is irregular, Song Xuan still wants to use a wooden stick to prop it into a square, and when the time comes, the wooden board that pushes the wind in is relatively easier to make, if it is made round according to its shape, and then wants to fit it completely, that wooden board will not be so easy to polish.

Wood is also used off-the-shelf, although not much in stock, but it is more than enough to make a rectangular wooden frame half a meter long and thirty or forty centimeters wide.

However, the existing wood still needs to be polished again, as far as possible horizontally and vertically, and each side must be so that there are no too many undulations.

There are no other tools here, so they can only be ground on the stone, but fortunately, they can be regarded as semi-finished products, so it took half a day to grind to the desired effect.

Before assembling, you have to carefully get the sheepskin right, and the four-legged part, but you can't completely remove it, because there is no way to seal it after removing it, so you can only use a rope to tie the legs as tightly as possible so that it doesn't leak.

At the same time, he also made full use of the two big holes in the front and back, where Song Xuan was going to connect the pipe directly to the burning stove, and the big hole in the tail was directly made into a place to push the wind rod inside, which can be regarded as using this complete animal skin to the limit, and almost every place was not wasted.

The size of the frame is completely according to the animal skin, the big animal skin can't be covered, and the animal skin can't hold up if it's smaller, so there will be a lot of gaps at that time, so it will be completely useless.

So there is no room for a little error, although there is no ruler in the tribe, Song Xuan still brought a few animal skin ropes and marked them on the same length, striving not to have too much error.

However, the existing wood is redundant, and it can be slowly polished after it is done, but if it is short, there is no way to make up for it.

Such a frame must not be tied directly with a rope as usual, or have to use a relatively strong rope riveting structure, but the method is more primitive, you can only take charcoal little by little to burn a hole, and then carefully take something to grind a little bigger, and then polish the corresponding wood part, and finally put it in.

It's very cumbersome to say, let alone when it's time to do it, the two of them are careful and careful, and they don't even dare to gasp more when they burn it.

Fortunately, Shiban also has some experience with this simple mortise and tenon joint, after all, he has done some related things before, and after burning out a similar round hole, he will stop in time, and then use the bones to shovel off the blackened charcoal, and polish it as round as possible, so that the corresponding wood is also easy to make.

Looking at the wooden frame in front of him, which took two days of hard work to make, Song Xuan shook it a few times, it was still very firm, at least not a little loose at the moment, which also had something to do with the fact that the two of them were extremely conservative, the hole burned a little smaller, and the wood was not polished very finely, so it could only be squeezed in little by little, which was naturally very firm.

Moreover, in order to ensure that Song Xuan is strong enough, each piece of wood is a burning hole, and the other is used as a socket.

As for the protruding part on both sides, it can only be burned and then polished and smoothed, polishing off one end, and after making sure that the animal skin can be propped up, Song Xuan continued to make the other end, although it was measured, but it was safer to test it.

After it was completely done, the two of them put the sheepskin in, because it fit very well, so it was not easy to put on the sheepskin, Song Xuan was afraid that the sheepskin would be worn out, and he specially got some oil to rub it on the sheepskin.

Then came the most difficult part to make, and the key part of this simple seal, which was the design of the air push plate and air inlet.

This board must not be too thick, Song Yaxuan gave Shi Ban, the limit is one finger thick, and if it is thick, it is estimated that it will not be easy to use, and it will be more tiring to push it if it is too heavy.

And it must be a complete plank, Song Xuan can't do it, put the plank together, and it can be done to the point where it doesn't fall apart.

As for the other parts, Song Xuan can only design it slowly, and the four corners of the board can be dug out to fit the frame inside, which was also designed before, so that although it can't fit completely, it also reduces air leakage as much as possible.

The air outlet is also the simplest, that is, the neck of the sheep Song Quan's temporary idea is to set a bamboo pipe, after all, the same size of bamboo is easier to find, and the bamboo is gradually tapered, these are in line with the principle of air supply, gradually narrowing can make the wind speed faster, so that the wind can naturally blow into the entire stove.

Song Xuan hadn't figured out how to do it for a while, after all, they were all animal skins, and they couldn't easily dig holes for experiments, so they could only think up in their heads before they started.

Although Song Xuan knows the relevant principles, after all, he has not completely stood in it to see what the structure is, he can only rely on his own imagination to do it, although Song Xuan has theories that are thousands of years beyond this world, but most of them are only in the theoretical stage, and he is not very good at practical operation, after all, he is just an ordinary person, it is impossible for these things that have basically been eliminated in later generations to understand them very thoroughly.

Especially these things used by Teng Snake are the most primitive objects, and it is quite good for Song Xuan to think of this kind of thing.

After thinking about it for a while, it was decided to make a hole in the hide for air intake, but the hole still had to be designed.

Song Jun's idea was to dig a square hole with enough air intake above the side near the outside, and of course this hole only had three sides, and it still had to be connected to the entire large animal skin.

Then tie a piece of wood under the excavated hide, which doesn't have to be too big, just a finger's thickness, but strong enough to extend to the front of the bellows.

In this way, on the same line, dig a depression that matches the size of the wood on the air pusher, and when the board is pushed inside, directly stick the wood to the top of the bellows, so that the air inlet is sealed, and when it is pulled to the rear end, the wood hangs down, and the air inlet is naturally opened.

Although it is not the most perfect solution, this is also a better way that Song Xuan can come up with for the time being, so that the air intake can also be closed by the way when the air is supplied, and at the same time, it can also naturally enter the air due to its own gravity.

In order to ensure that the cut animal skin can still seal the gap, so it can't use the set of burning stones and scalding the skin developed by Song Xuan, and can only use a stone knife to cut slowly little by little.

In order to tie the animal skin to the wooden stick, Song Xuan cut a piece of hemp from the ground and braided it into a thin hemp rope.

It took two days for the two of them to build the frame, but these two days were not enough for Shiban to grind out a suitable size plank, and in the end, it took four days before and after, and the wooden board made barely met Song Xuan's requirements, although there were many obvious traces of polishing on it, but now, this is already the limit that the tribe has been able to do.

The next thing is to install two poles for pushing the wind on the board, which is a relatively easy link that has not been seen for a long time, and the structure of mortise and tenon is used, but there are not so many requirements for wood, and the logs around the tribe can be directly selected, but the round wood is more convenient to use.

In order to ensure that it is strong enough, Song Xuan has reinforced the poles on both sides of the plank, even if a piece of wood is broken, it should not affect the use.

There is also a small handle on the outermost part of the two poles to assemble, at least in this link, Song Xuan feels that there is not much difference between what he has seen before, just replace the square wooden stick with a round one.

This is also the most satisfying part of Song Xuan, of course, the other parts are also the best that can be made temporarily, and if you are not satisfied, this is it, at least Song Xuan does his best to look like it, as for what it is, we can only wait to see how it works after assembling it.

First stuff the wooden board diagonally, adjust the position, and then install the pole for pushing the wind, fortunately, both ends are empty, and it is not troublesome to install, the well-designed wooden board is basically very close to the inside, Song Xuan pushed back and forth a few times, but he only felt a little friction, and then smeared oil on him, rubbed back and forth a few more times, and it was smooth naturally.

Feeling the wind blowing from the sheep's neck, Song Xuan was also full of a sense of accomplishment:

"Ben, you can try it too!"

"Hey, hey!"

The wind-blowing class showed a burst of smirks, it was true that he had been busy with his work in the past few days, basically he didn't have much rest, and he began to grind wood after eating, because Song Xuan attached great importance to the bellows, Shi Ban naturally didn't dare to borrow other people's hands, all by himself, at most let the bow and arrow on the side and them beat it.

Although the designed air inlet is not perfect, it is not too much of a problem to use, holding the bellows, Song Xuan said to Shi Ban:

"Go, grab the bamboo, go and try the stones for them!"

Seeing that Song Xuan brought a sheep-like thing, the stone immediately recognized what it was, and shouted at Song Xuan happily:

"Oracle, you ...... Made it? ”

"Well, try it first!"

Song Xuan said and assembled it with Shi Ban, put the bamboo pipe around the sheep's neck, and tied it tightly with animal skin rope.

Song Xuan didn't move anymore, and pouted at the stone, motioning for him to try it too.

The stone has not run to the workshop for the past two days, and he has a very clear grasp of the progress, and he is also very clear about the use of this bellows.

Seeing that Song Xuan asked him to use it himself, he and Shi Ban carried the bellows to the door of the stove and stretched the pipe into the combustion chamber, fortunately, there was still some distance from the charcoal, and it would not burn out at once, Song Xuan also thought about the next design, that is, let the stone burn a batch of pottery pipes with clay, so that he would not worry about the pipe being roasted after a long time.

I saw the stone take the pole and push it inside, as the air rushed in, the charcoal fire in the combustion chamber immediately became stronger, and after pulling back and forth a few times, the flame in the combustion chamber became much larger, and as long as enough wind was sent in, it could be maintained for a while even if it stopped slightly.

Of course, this time is relatively short, and you still have to continuously supply air at once, but this is much less labor-saving than taking a fan, and pushing and pulling back and forth does not consume much energy.

"Divine Messenger, Divine Messenger!"

"It's really okay!"

The stone with the bellows was very excited, and even if the three of them took turns to come recently, they didn't have time to stop, because they had to make clay billets in addition to fanning the wind inside.

The successful production of the beehive can also be regarded as solving the last shortcoming of the firing pottery, although the existing beehive is not perfect, but it is also unsatisfactory, it is not a problem to use it for a period of time, the entire inner layer of Song Xuan is smeared with grease, so the loss is not particularly large.

When this is broken, it is estimated that Teng Snake has also used new tools, even if it is not used, it is not troublesome to do a few more at that time, and some bad places can still be changed at that time, if you have mastered the technology, it will only get better and better.