The measuring unit of the needle is calculated according to the "silk". LMM = 100 silk, or 1 silk = 1 mm. The visible needle is a very high - precision sewing machine accessories.In Shanghai hualian sewn equipment co., LTD., xin xianbin's thick notebook is the various sizes of needles that he has accumulated over the years.Through xin xianbin's explanation, originally such a small machine needle, among them the mystery can be big.
Let's see how good a needle should be identified?First, we need to see the finish of the needle.Second, the "three children" of the needle.The head, the eye, the slot.The head is the pointed part of the needle should be reasonable, different USES of the needle usually adopt different taper;The eye is the eye of the needle, should be clean, must not have the slightest burr;The slot is the slot, and the bottom of the slot must be clean.In addition, the concentricity should be vertical and not curved;Needle handle should be within the tolerance range, good also can't bend machine beard needle handle, and the most easy to grasp the method of identification is the needle handle trademark, specification of the handwriting to clear, even the font to be beautiful and delicate.
At present, China's annual production of needle sales volume is about 80 million packs in China, and the total sales volume of foreign products in China is more than 20 million.China's machine needle market is very promising, and more and more foreign counterparts have targeted the sales target of the needle production in China, and have begun to find partners in China.But the problem is how to build and improve the domestic sales network, because the domestic machine needle market is very irregular.For example, the imported organ brand needle DBx 1 is a pack of 7 yuan in China, while DBx 1 produced by domestic machine needle production factory only sells at 0 in China.60 yuan a pack. If you export, you only sell 0.$05 a pack.Those more famous name-brand computer needle in China such as diamond, flying tigers, pearl, their production is very big, but the price is low, the diamond is not as expensive as "diamond", an average of only 1 yuan a pack;Japan and Germany produce very little, but prices are high.The same products, foreign brands are nearly 10 times higher.Why on earth would such a situation be formed?In the end, we still cannot keep up with the pace of science and technology. The combined strength of the needle in the production process has a certain gap with the foreign brand.
Xin xianbin told reporters that the gap between the domestic production machine needle and the foreign machine needle in the clean, processing technology and raw materials is extremely obvious.First of all, the most deadly is the smoothness, which is used in foreign countries to use chemical methods to burr.At home, it is the "soil method" which is polished by grinding and shred.High carbon and high chromium raw materials are widely used in China, and high carbon and low chromium are adopted abroad.The difference of chromium content directly leads to the rigidity of the needle.If the chromium content is too high, the machine needle will be too hard, and lack due toughness, will lead to the result of the easy to break.In processing technology, the mold requirements are very high, the advanced technology of foreign countries basically reached a molding, and the domestic cannot reach this level.The precision of the machine needle requires very good equipment to be able to meet the requirements of its production process.Abroad is only this step heat treatment processing equipment is as high as $400000, needle to produce a whole production line all off about millions of dollars, domestic production enterprises needle no one can achieve this level of production equipment.