Especially: a hundred years ago,

The fireworks of the "fireworks bomb" invented by foreigners,

It has always been the most popular and favorite fireworks variety.

Earlier,

Fireworks are just a kind of fire.

This is strictly controlled stuff. Private purchase, transportation, possession and discharge are prohibited. Only a professional discharge company can discharge it on its behalf.

Customers only need to pay, and customers are not allowed to touch the packaging and shell of the fireworks display! ! ! !

The structure of fireworks bomb is that gunpowder is made into particles in a heated open cylinder.

The cylinder keeps rolling, pouring adhesive, flame retardant and gunpowder into it. They embrace each other and form many spheres.

These spheres are like snowballs, rolling bigger and bigger.

Chinese and western medicines are granulated with round particles, and the surfaces of drugs and food particles are coated with sugar, and the process of making food chocolate peas is similar.

A thin layer of kindling powder is rolled on the surface of the bright beads, otherwise the bright beads can't be ignited when the buds are opened, and the blasted bright beads can't start bright curves.

This is "bright pearl", dried in the shade, mixed with gunpowder, inserted into the fuse, fuse,

Wrapped in two semi-circular paper shells, wrapped outside the paper shell by a planetary motion tape winding machine,

Wrap the adhesive in a paper case, and be careful not to leave a fuse.

Tightly wrapped, "budding" paper shell will have great pressure, and "bright beads" will have a large distribution diameter, and the artistic effect will be spectacular! ! ! !

The package below fires gunpowder.

Among the launch tubes, glass steel tubes are used in China and thick-walled stainless steel tubes are used abroad. Decorative pipes or iron pipes cannot be used. The standard practice is to use seamless steel pipes with deep holes extruded in the middle instead of welded steel pipes with longitudinal welds.

The processing technology of seamless steel pipe was also invented by foreigners. The cylindrical billet is heated, clamped outside and plunged into the middle of the billet, and the plastic fluid is deformed to push out the inner hole alive.

After the propellant is ignited, the sphere is pushed into the air, and when the projectile is at the highest point, the delay fuse is detonated. The bud opener exploded a bright pearl in full bloom, which exploded around with the explosion center as the origin, and pulled out a dense colorful bright line in the air, which was quite spectacular, colorful, fascinating and fascinating.

Fireworks have been entrenched at the top of fireworks, and their authoritative position is unshakable, indestructible, irreplaceable and subversive.

Its defects are also obvious,

That is, people like to distribute "bright beads" unevenly in paper shells, but in an overhead three-dimensional distribution, expecting bright three-dimensional patterns to burst out after "bud opening".

However, the spatial distribution of these patterns is not expected, and the direction of spatial vectors is irregular and discrete. For example, to print the logo of the "Olympic rings",

Five fireworks bombs were launched. As a result, the spatial distribution of the five rings was not on the same plane, which was chaotic, disorderly and inconsistent. This is also a very helpless thing, foreigners 100 years can not be improved.

Only a few hundred barrels can be used to print characters and patterns, which are arranged in a straight line and point to a plane. When each shell is hit, a delay fuse is detonated at a specified height in the air.

This is to use lattice to build patterns. This kind of equipment is huge, needs a lot of space and has high installation cost. Pulling the equipment from the fireworks enterprise to the discharge site and then transporting it back to the fireworks enterprise is costly, and the overall cost remains high, so it cannot be popularized. Moreover, Dotmatrix is not clear, the highlights are discontinuous, and it is just passing by. It is not worth spending so much money to make a short-lived artistic effect.

If it challenges its monopoly in the future,

It will be guided fireworks, guided fireworks,

Baidu's website has a detailed introduction.

According to keywords,

Just search.