Fireworks shell is an important product in fireworks products, A class of large-scale high-altitude fireworks. It is a modern fireworks technology and plastic arts artfully combined art, it concentrated all kinds of toy fireworks manufacturing skills and principles of action, is currently all fireworks in the higher level of a class of products.
The main use of fireworks is for people to enjoy and hold celebrations to use, set off to watch more people, the impact is relatively large, so we not only require the product to produce the fireworks effect when setting off, but also must ensure the maximum safety when setting off. For the safety production and quality requirements of fireworks shell products, we should ensure from the following aspects.
1. No flame-out is allowed.
1. After the ignition primer (including fast lead) is ignited, it is necessary to ensure that the projectile body is launched into the air without duds;
2, the delay should ensure that the fire is transmitted in time when the bomb is launched into the air, igniting the opening glass in the bomb body, so that the bomb explodes, and no black bombs appear;
3, the production of bright beads, parts to ensure that there is a strong ignition rate, no ineffective projectiles;
In the discharge process, if there are the above situations, no matter which kind, it will bring great harm to safety, and may lead to the discharge personnel and viewers being hurt, and even life accidents.
Second, the burning time should be accurate.
1, ignition time to be accurate. That is, the ignition combustion time should be controlled between 6 seconds and 12 seconds according to the standard (except for export products, customers have special requirements), and there is no burning too fast or too slow phenomenon;
2, the delay lead in the combustion to ensure accurate. That is, the time of the delay lead from ignition to detonation should meet the design requirements, and the phenomenon of early explosion or backfire time is too long can not lead to a return explosion.
Third, it is not allowed to blast the chamber or blast the chamber, otherwise, it will affect the discharge effect, and may cause casualties or fire accidents.
Fourth, require a certain burning height.
1, fireworks projectile body launched into the air explosion height from the ground to meet the design requirements, too low will produce sparks fall, causing fire or injury; Too high fireworks shell effect pattern becomes smaller accordingly, which will give the viewer a sense of incoordination;
2. The parts in the body of the fireworks cartridge can not be burned for too long, which will cause the embers to fall and cause fire risk.
5. The discharge effect should be consistent with the product name, and the air pattern should be intact.
6, ensure that the product is effectively dry, so that the product in the effective storage period does not occur mildew and lead to chemical deterioration, parts failure, bomb surface lightning spots and other phenomena.
7. Ensure that the external surface of the bomb is smooth and clean, the labels and warning words are pasted neatly and without mistakes, and the external effect parts are tight and do not fall off.