1: The ball can be made of natural materials, artificial materials or their mixture. As long as the flying performance of the ball is similar to that of natural feathers wrapped in sheepskin and cork ball holders.
2. The ball should have 16 feathers fixed on the ball holder.
3. The feathers are 62-70 mm long, and the length of each ball's feathers from the ball support surface to the tip of the feather should be the same.
4. Feather tips are round, with a diameter of 58-68mm.
Feathers should be tied with thread or other suitable materials.
6: The bottom of the ball holder is spherical with a diameter of 25-28mm.
7: The ball weighs 4.74-5.50g..
8. Non-badminton:
8. 1: skirts made of synthetic materials or balls made of natural feathers.
8.2: The bearer is as stated in Rule 6.
8.3: The size and weight of the ball shall comply with the provisions of Rules 3, 4 and 7; However, due to the difference in specific gravity and performance between synthetic materials and natural feathers, the error cannot exceed 10%.
9: As long as the general style, speed and flight performance of the ball remain unchanged, with the approval of the relevant organizations, the standard ball may not be used in the following special circumstances.
9. 1: When the standard ball is not suitable due to the weather conditions at altitude;
9.2: Only when the change is beneficial to competition.
2. Classification of badminton hair:
High-quality badminton hair must use goose knife hair. If you use duck knife hair and other rough pieces, its quality is difficult to guarantee.
The classification of ball hair is very complicated. Because there is no unified national classification and numbering standard at present, the labels of badminton produced by various manufacturers are all customized. If different manufacturers have products with the same label, it doesn't mean that their quality is the same. Take Jinhe Factory as an example: all middle and high-grade badminton, that is, products with the word "A", are made of live plucked white goose feathers. First, it is divided into large, medium and small hairs according to the hair quality, then it is divided into one, two, three and four grades according to the hair quality, then it is divided into five standards according to the warp of the hair, and then it is classified according to the thickness of the hair stalk and the thickness of the hair. The 16 feathers used in the same badminton must be of the same category and as similar as possible. The more high-end products are used, the more consistent the 16 wig is, so as to ensure the flying quality of the products. Low-grade products, that is, ordinary leisure balls, are also made of white goose nest hair and camel hair, and the processing technology is the same as that of high-grade products, ensuring aesthetics and durability.
3. Classification of badminton ball heads:
According to the materials used, there are three common types: hard plastic, foamed plastic and cork. The first two kinds are mainly used for low-grade leisure badminton with low cost and poor performance. Middle and high-grade badminton all adopt natural cork ball heads, which can be roughly divided into three categories: integral cork ball heads, composite cork ball heads and recycled cork ball heads. Their structural diagrams are as follows:
It can be seen that the best ball head is of course natural cork, and the composite ball head has low cost and is not easy to break, but if the hitting force is large, it is easy to break the regenerated cork at the lower part, thus affecting the hitting performance. However, the cost of recycled cork ball head is lower, and the flying performance is better than that of non-cork ball head. Although its anti-strike ability is poor, it can meet the needs of specific users. For example, the 204A produced by Jinhe Factory is a low-priced medium-performance badminton suitable for beginners. Considering that beginners' hitting power is generally not too great, the main reason for badminton damage is that it is easy to hit the ball hair, so the regenerated cork ball head is not easy to crack, and its flying performance can fully meet the practice. Of course, the strength of cork ball heads recycled by different manufacturers sometimes varies greatly due to different production processes. In recent years, the ball head manufacturer has developed a ball head made of bionic plastic and natural cork, which is cheap and good, and the effect is ideal.
4. Identification of badminton Mao Mao quality;
High-quality badminton feathers must use high-quality goose feathers. The strength and toughness of goose feather are especially suitable for badminton, but its cost is high and the supply of raw materials is limited, so some badminton manufacturers with low requirements use duck feather. It is difficult to distinguish duck feathers from goose feathers only by appearance, and the well-made duck feather badminton has good flight performance. Because the hair stems of the two hair pieces are different, their hitting resistance is much worse than that of goose feather badminton, and normal hitting is easy to break because of the price of duck feather.
5. The difference between badminton glue:
The quality of glue directly affects the firmness and durability of badminton. Glue used in badminton production can be divided into two categories: advanced resin glue and chemical glue. High-grade resin adhesive is superior to chemical adhesive in hardness and firmness, but its cost is relatively high, and it is generally used to make high-grade badminton. For example, 200A and 20 1A badminton made by Jinhe Factory are high-grade resin glue, while other kinds of badminton are high-strength chemical glue. In order to ensure the quality, the glue content of each badminton is higher than the requirements of national standards.
6. Quality inspection items of finished badminton:
Test items generally include: stability, impact resistance, weight, caliber, speed, adhesion fastness, hook fastness, etc. The manufacturers of these projects generally do not and do not need to test them item by item. When consumers buy badminton, they can test and compare their most concerned qualities according to the above items.
7. The difference between high-end products and low-end products:
Apart from the appearance, the main difference lies in the flying performance of the ball, that is, stability, speed, deformation when hitting and rotation when flying. High-grade badminton requires a lot of wigs, and the appearance and quality of wigs on a ball 16 are similar, so as to ensure the high standard requirements of badminton, which leads to its higher price.
8. The relationship between speed, weight and caliber of badminton;
In the same area, the flying speed of badminton mainly depends on its overall weight, caliber, hair type, the difference between the left and right hairs, and the weight ratio of the ball head to the ball body. Generally speaking, the caliber of badminton manufactured by the same factory is fixed. For example, the caliber standard of Golden Carved Badminton is 66.5mm±0.5mm, that is, 66-67 mm. At this time, the main factors that determine the ball speed are the overall weight of the ball and the weight ratio of the ball head to the ball body. So according to the overall weight of the ball, we can know its approximate flying speed and where it is suitable.
9. What kind of badminton should I choose in different altitude climate areas?
The most basic requirement of badminton is that the speed or weight of the ball used must be appropriate, otherwise many techniques will be difficult to play. Badminton with the same weight will fly at different speeds in different areas, because the weight of the ball is closely related to altitude and climate. The high air density at high altitude will reduce the air resistance when badminton flies, so the weight of badminton used at high altitude will be reduced. At low altitude, the air density is high, and the air resistance of badminton in flight is great, so the weight of badminton used at low altitude is heavier. Take the golden eagle products as an example: Shanghai: 5.2g, Guangzhou: 5. 1g, Kunming: 4.7g, Chengdu: 4.9g. In addition, the air humidity and temperature also have certain influence on the speed of badminton, but the altitude has the most obvious influence.
10. What are the disadvantages of using heavy badminton or light badminton to the racket and human body?
The overall weight of badminton is too heavy or the ball head is too heavy, which will cause great vibration when hitting the ball, which will have a great impact on the badminton racket and badminton line and reduce the service life of the badminton racket and badminton line. The most obvious thing is that the service life of badminton line will be greatly shortened. On the other hand, long-term vibration will be transmitted to the batter's arm, which will also have some bad effects on the arm. If the weight of badminton is too light, because the ball is not in place, the batter will send out more strength to achieve the goal of hitting the ball in place, which will easily cause fatigue and injury to the arm. So choosing the right weight badminton can not only make you enjoy badminton better, but also reduce your risk of injury.
1 1. What's the manufacturing process of badminton?
The production technology of badminton is divided into three parts: wool making, head making and combination.
Wool making process: wool washing, drying, wool selection, wool washing, classification, warping and wool mixing.
Head making process: grinding, repairing, wrapping, baking, peeling, drilling and weighing.
Combined technology: hair planting, glue injection and drying, thread hooking, adjustment, glue brushing and drying, head wiping, edge winding, weighing, applique, finishing, stability testing, weighing, packaging and warehousing.