Under the guidance of Wang Tian, the installation problem of the door was successfully solved, in fact, such a door leaf installation method is already simple and outrageous, and the doors of the firewood room and utility room in many rural areas in later generations are better than this.

But in the primitive era, there was no metal, and it was impossible to make metal hinges, even if Wang Tian could design a stronger door shape, but because of the lack of metal, he could only look at the door and sigh.

Metals affect all aspects of life, and if we had iron metal farming tools, it would be much easier to reclaim wasteland, and we wouldn't have to work as hard as we do now.

In this regard, Wang Tian had no other way but to sigh, he could only hope for a meteor shower in the sky and obtain some extraterrestrial metals from the falling meteorites.

Now even if the house has been built, it doesn't matter if the stones fall from the sky in order to get metal, the roof is broken, it's a big deal to make up for it, but it is difficult to move an inch without metal......

As for the rafting expedition before the snow season this year, he was really not sure that he would be able to find metal minerals, and in order to get some metal, Wang Tian also asked Kuroko to take the children of the tribe to pick up all kinds of pebbles by the river.

He wanted to use the method of a blind cat to meet a dead mouse to see if he could find iron-containing metal ores, but the result was in vain and he found nothing, and this result was expected, so he had nothing to be disappointed about.

Wang Tian is not an all-rounder, in fact, he doesn't know anything about geology and mining, except for reading online novels and knowing that malachite is a kind of copper ore, and iron ore seems to be available in various colors, other knowledge is no different from everyone in the tribe.

In the future, the only way to find metal ore is to use the method of blind cats touching dead rats, find stones that have not been seen, put them in the graphite tong pot, and use a blower to refine them, and that is the one that can get the metal liquid.

Of course, the preliminary exclusion method can also be used, since it is a metal mineral, then the density of the stone will generally be greater than that of ordinary stones, two stones of the same volume, if one of them is heavier, then it is more likely to be a metal ore.

Just when Wang Tian was thinking about how to distinguish iron ore, he felt that his two ankles were hugged, and he didn't have to look down, and he knew that the two little tiger cubs were hungry and were asking his dad for food.

Wang Tian squatted down and stroked the two tiger cubs in turn, which he learned from the TV program of the animal world, and the petting of pets helped to increase each other's feelings.

"I'm hungry, so the two little ones went to find their mother by themselves." Wang Tian pointed to Ling'er, who was sewing animal skin clothes in the pavilion, and then continued: "Go! ”

The two little tigers seemed to understand what he meant, and ran in his direction to Xiao Ling, running while making a whining sound in their mouths, looking very cute.

For the matter of asking for milk for the two little tigers, it has always been Ling'er who has come forward, and he is a big man who can't tear this face, staring at the mothers and begging.

After the two little tigers ran away, Wang Tian got up and asked the second brother and Liu Bei again: "Is the door panel of the ancestral hall ready?" Is there a problem with the installation? ”

The installation of the door panel of the ancestral hall is the same as the dismantling of the door leaf, and the difficulty lies in the tight fit.

Ideally, the two long sides of the door panel need to be made into two concave and convex shapes with a chisel respectively, and the concave edge of one door panel and the convex edge of the other door panel should be docked with each other when installing. In this way, there is a double block, which can be tightened together to the greatest extent.

But now there are only metal axes, and Wang Tian can only design the shape of a seven-character notch with the left and right sides of the door panel misaligned with each other, and then paste animal skins on one of the notches to seal it.

When the second brother of King Kong and Liu Bei heard the Son of Heaven ask, they immediately replied: "Son of Heaven, I have already made two pieces, I tried to install them, there is no problem, but it is too time-consuming to make that notch." ”

Wang Tian nodded, he understood this situation, there was no saw, a wooden board 5 meters high and more than one meter wide, all of which needed to be split by hand with an axe and an axe, just making wooden planks was already very troublesome.

What's more, it is necessary to cut out a relatively flat seven-character notch, which can be imagined, and everyone in the tribe will go around the new house every day, and the desire to live in the new house is very urgent.

Wang Tian, the second brother of King Kong and Liu Bei all saw this, and now that the two of them have determined the production method, it is also the most reasonable to make and install the door of the room first, and the first snow of this year is estimated to be in these ten or twenty days.

"There's really no rush for this, it's okay to make the door of the room first, and it doesn't matter if the door panel snows and then does it, but it's too much trouble to chop the wooden planks one by one with an axe."

In the absence of a saw, a tree with a diameter of about one meter can only take out 1~2 planks, which is too time-consuming, and it takes more time to make the thickness of each piece of wood consistent.

There are no metal tools, but there are still stones, Wang Tian plans to make a long stone knife, the length of the stone knife must be more than 1 meter 2, after making up his mind, Wang Tian casually summoned a playing child, and asked him to call the big hand over.

Dashou is now responsible for the manufacture and repair of stone tools in the tribe, and Wang Tian will also be handed over to him in the future for the manufacture of iron tools, and the scientific and reasonable allocation of human resources can maximize the productivity of the tribe and reduce the burden on himself.

After the big hand arrived, Wang Tian called the second brother of King Kong and Liu Bei over and explained to them how this stone knife would be used, the stone knife did not need to be sharp, the most important thing was to be firm and able to withstand the beating without shattering.

When cutting the plank, first use a metal axe to cut a gap of corresponding thickness at one end of the wood, determine the thickness of the plank in advance, and then put the stone knife into the wood gap cut by the axe, and then two people use a wooden hammer to hit the two ends of the stone knife beyond the trunk at the same time.

The reason why a wooden hammer is used instead of a stone hammer is that objects of different materials are not easy to cause chipping, and wood is softer than stone, and even if it is damaged, it is generally broken by wooden hammer.

This method is much faster than cutting planks by hand, and a log can cut at least 4~5 planks, and the thickness is easier to control.

Because the length of the log reaches 5 meters, in the process of beating the stone knife, the stone knife will be squeezed tighter and tighter by the wood itself, then it is necessary to make several wooden deeds, once it is found that the knock cannot be moved, the wooden deeds will be beaten again into the gap of the wood, which is actually the use of the principle of leverage.

Because of the tension provided by the wood deed, it will be much easier to hit the stone knife next, and even the wood that is completely dry will crack along a certain pattern.

As for whether this texture and thickness are what you want, this luck component is the majority, but as long as you choose the wood, choose those that are straight and have no knots and no scars, the effect will generally be ideal.

Under Wang Tian's careful explanation, the master of making the stone knife understood which material of stone should be used, and the two people who were responsible for processing the wooden planks also understood the skills, which is why Wang Tian wanted to pull the three of them together to explain.

This saves a lot of trouble, and it is enough to say important words only once, so Wang Tian definitely does not want to say it twice.

And this is also in line with the spirit of later generations of industrial design: the designer should understand the difficulty of the user's operation, and the user should understand the possible defects of the design, and try to avoid it in the process of operation.

Wang Tian used a model demonstration in the process of explaining, and the three of them quickly understood his intention and the operation method in use, and then left to continue their own work.

The second brother continued to install the wooden door, and the big hand rushed back to repair the stone tools, the wasteland has not been carried out for a whole day, and has used 5 stone hoes, two stones made of Luoyang shovel, which can be repaired, and can only be redone if it cannot be repaired.

In short, everyone was very busy, but at this time Wang Tian had already rested, he returned to the group of sewing animal skins again, and found that the two little tigers were curled up together after eating and drinking, and they were sleeping soundly, looking very kawaii......