What is the reason for the holes in the surface of the plastic chair?

In many restaurants, different decorations will make the store create different furnishings, of course, the tables and chairs are carefully designed and placed in, in order to have a good experience environment when guests enter the restaurant to eat, and the placement of tables and chairs is particularly important, but in some rural areas or small shops, basically no one will care too much about such tables and chairs, but the simplest tables and chairs can also eat delicious food.

Usually the plastic chairs we see are very lightweight, no matter where you move there is very convenient, but also let many families will deliberately reserve a few plastic chairs at home, just to prevent guests from visiting, ready for guests to sit, but we have seen most of the plastic chair design even if there are many patterns, there will always be a few holes in the plastic chair, why will these holes be designed?

First of all, the plastic chair is to consider the drainage problem, after all, such a light chair is for a large number of guests to sit, then it is likely to sit in the open air, after the rain will have water on the concave surface of the chair, it is difficult to clean and the speed of drying is very slow, and after there are holes, it is easier to drain the plastic chair, and it will naturally dry quickly. The second is that the plastic chair has a certain toughness, and there will be pressure after people sit on it, and the plastic will extend to different places, and the hole is designed to accommodate the weak extension.

Finally, because the plastic chair is small and easy to move, as long as it is stacked together, many plastic chairs can be moved, and the chairs stacked together will form a vacuum environment, which is difficult to separate, and the existence of holes can avoid the plastic chairs that cannot be separated because of the vacuum environment. On the contrary, it is the plastic chair that saves space and makes everyone love it.

This is because the pressure bearing capacity of this plastic chair is relatively weak, so it can also disperse a certain amount of pressure in this way.

Because this gives you the freedom to breathe very well, and it will also have good drainage. It also shares the pressure and gives the chair a longer lifespan.

This gap is to give space for expansion, so that the chair is stressed more evenly, and even if it is affected by external forces, the chair is not easy to deform.

One is easy to move and transport. How do you usually take a plastic stool? Of course, I took my fingers off and took them away.

If there is no hole, we either hold it or hold it, not too human. In the process of carrying the stool, we can use a rope to drill a hole in the middle and tie it together to prevent it from falling halfway, so the hole is kept scientifically.

If no hole is left behind, a sealed space is formed between the two stools. Because the air pressure is difficult to peel off, and it is difficult to stack the stools together. Putting a single stool would make the storage space in the warehouse too wasteful, and this hole solves all the problems perfectly.

To make a plastic stool, you need molds and injection molding, and if you make a hole in the middle, it will be much easier to lose your hair and save some materials. Of course, heat dissipation is also one of the functions of this hole in the chair, and when you usually sit on the stool, you will feel that the seat without the hole is hotter and better with the hole.

The upper and lower stools create a sealed space, so the air pressure will make it difficult to open the stool and it will be difficult to pile up when stacking the stool. As in the Magdeburg Hemispheric Test, a lot of force is required to pull the hemisphere due to the internal vacuum. A similar effect can be produced in a naturally stacked stool that is not vacuum, but the air pressure in the internal cavity decreases before opening.

Why is an airplane porthole a circular rectangle, if there is a square or pointed hole, the sharp point stress will be concentrated, and it is easy to break when stressed, while the round shape is easier to tear. Of all the holes with round holes, the round is the easiest to make a mold, so it is perforated and prone to hair loss. The size of the hole is also well-founded.

If it's too big, it will affect the strength of the structure, and if it's too small, your fingers won't be able to get in when you pull out the chair above, so it's just right if it's not too big!

One is an injection molded stool. The blank fragments that the worker takes out from the machine, which is easy to operate, and the air is ventilated from the hole when accumulated, so that the air pressure of the flat plastic leaks out of the middle of the stool, so that the stool position is tight, but not adsorbed, which is called the void packaging method. Sitting on a flat stool with poor air circulation makes it inconvenient to sit up.

There is a hole in the middle, and the heat may spread. It is easy to take off the stool and move it at will, and the fourth use is to reduce weight pressure, and it is not easy to be stressed and **. The fifth advantage is that there are holes when farting and air circulation.

If you don't hold your breath, you can't make a hole. Sixth, when sitting in the bath, the bath liquid catcher flows along the hole, and the water surface does not accumulate water. Buy 10 plastic chairs at home, all of them are one chair, spread, press, do not suction, easy to take out, use the hole in the middle of the chair to prevent heavy pressure, exhaust, ventilation and water leakage.

It seems that this hole is used for drainage. If the chair gets rainy, the chair will have a concave surface to hold water, and the hole will drain the water from itself. I guess that's what it's used for.

Plastic chairs do not have the characteristics of moisture absorption and ventilation like wooden furniture, the holes on the plastic chair can play a role in ventilation, if there are no holes, sitting on the plastic chair, after a long time, you will feel not breathable, sweating, you will feel damp, affecting the user's experience.

This makes the plastic chair more malleable, stress-bearing and more durable.

This stool design can be stacked together in many pieces, which is convenient for storage and transportation. If there is no hole, the upper part of the stools stacked together may, depending on the structural design of the inner surface of the stool, form a closed space, and the air pressure difference will make it difficult to pull the stool apart quickly, and it will be difficult to stack the stool tightly when stacking the stool.

The stool is an indispensable piece of furniture in life, and it will be seen no matter what it is. The most popular is the plastic chair, which is lightweight, convenient and inexpensive. But have you ever wondered what the hole in the middle of the plastic chair is for?

Some netizens said that this hole is in the middle of the chair, could it be for the convenience of farting?

Fart first, breathability second, reducing material to increase strength is third.

The first is to reduce the cracking phenomenon caused by external stress. The second is that the design of the general plastic chair can be stacked on top of each other, and a hole in the middle helps to separate.

It is for breathability, so that it is easy to stack together and take it away.

source: gaofenzi.I saw a very interesting question on the fruit shell network, I don't know what the gods think?

Why do all plastic benches have a hole in the middle?

We often have all sorts of wonderful ideas, so the question is, do you know why there is a hole in the middle of a plastic chair?

This kind of stool can be stacked together in many ways, which is convenient for storage and transportation. If you don't open a hole, when you remove the stool (only possible, depending on the shape of the details on the inside of the stool), it will be difficult to pull the stool apart due to air pressure, and it will be difficult to stack the stool tightly when stacking it.

source: gaofenzi.Remember the physics experiment in junior high school, the Magdeburg Hemispheric Experiment? The vacuum inside causes a strong force to be required to pull the hemisphere apart.

Although there will be no vacuum in the middle of a naturally stacked stool, the air pressure in the internal cavity will decrease before it is pulled apart, creating a similar effect.

In order to eliminate the effects mentioned above, it is perfectly possible to open any form of hole . Why is it a round hole that is not too big or too small?

source: gaofenzi.First of all, it would be tragic to open a square hole: similar to why an airplane window is a rounded rectangle, square, or any hole with sharp corners, the stress of the sharp corners will be more concentrated, and it is easy to crack when stressed.

Among the other holes with rounded corners, the round shape is the easiest to make a mold, so choose a round hole.

Why one? To breathe, if the size is about the same, one is enough.

Why is it not too big or too small ? If it's too big, it will affect the strength of the structure, and if it's too small, you won't be able to put your fingers in when you hook the stool above!

Pretend: As a person in the direction of polymers, I have to say that this is related to the injection molding process, so that the hole opening, the demoulding is easier, the mold is cheaper, and the material is saved. Finally, it is concluded that it is generally the low** plastic chair that does this.

Ordinary big head: This design is either for the convenience of processing or for the convenience of storage and transportation......Thinking about it from this point of view, I came to the conclusion that when the Mori Sock Chairs were stacked, it was easy to get the stack together by taking something through the hole.

Original source: gaofenzi

In life, we often have a big brain, I don't know if you have noticed a detail, no matter what shape, there will be a small hole in the middle of the plastic chair, do you know what the reason is? Plastic chair platforms are here to help.

Benefits of round holes.

Holes with sharp corners are easy to crack when stressed, and round holes are easy to make molds, and too large holes will affect the strength of the structure, and too small holes are not conducive to finger hooking. Now that we know how it works, let's take a look at the wonderful answers given by different people.

Literary youth. In this way, the hole is opened, the mold is easy to demold, the mold is cheap, and the material is saved.

Ordinary youth. Once the stools are stacked, you can easily remove them by threading the rope through the holes.

2b youth. Fart, it's as simple as that