Since the establishment, Dongguan Zuolong Machinery Co., Ltd. has always been focusing on the R&D and production of automatic cutting machine manufacturers . With great production capability, we can provide customers with personalized solutions according to their needs. Zuolong Machinery's sewing machine is widely applicable in the Manufacturing Machinery industry. Zuolong Machinery's automatic cutting machine manufacturers feature stable performance, high quality, and easy operation. Besides, they are reasonably-priced and well-designed. The products we produce are of high quality and reasonable price. If needed, please contact us! The automatic cutting machine series has many styles to meet the diversified needs of customers.

Main points and acceptance specifications for straight thread connection construction In order to ensure the strength of the steel bar (rib stripping) rolling straight thread joint meets the national industry standard JGJ107-2003 requirements for grade 1 joints,Formulate this regulation.1. the processed steel wire head should be self-inspected one by one,If there is an unqualified silk head, it should be cut and re-processed;2, self-inspection qualified silk head,The quality inspector shall conduct random sampling for inspection,The silk head processed in a work class is an acceptance batch,Random sampling 10%,When the pass rate is less than 95%,Should double the sampling,When the pass rate in the reinspection is still less than 95%,All silk heads should be inspected one by one.3, appearance and shape inspection: steel wire thread should be full,There shall not be an incomplete buckle with a large diameter of the thread lower than the middle diameter of the thread.The defective buck

What happened when the sewing machine was transferred to 4000? First of all, let's check whether the needle is installed correctly,It's better to change a new machine needle.2, if still not,We went on to open the needle,Turn the needle to the lowest position,Look at the rotary shuttle tip from the machine needle 8mm or so.If yes,Then raise the machine needle 2.3mm or so,Look at whether the rotary shuttle tip coincides with the machine needle center.At this time, the needle and the tip of the shuttle can not be too tight,There should be 0.1 gap.3, sometimes the needle has a little bend will also jump the needle, the easiest way is to change the needle to try, if not, when the needle is installed, try a little bit, only a little bit, otherwise, it will break the line. sometimes such a simple operation is also very effective.4. it also has something to do with the thickness of your sewing.Thick things should be thicker,If the needle is fine, it will jump,If something thin,If the needle is thick, it w

Development status and advantages and disadvantages of membrane filtration technology, mainly used for sewage treatment The current membrane technology is generally used for fermentation liquid filtration, oil-water separation, seawater dilution, etc,.The reason is that the cost is too high.And not suitable.The film can only be used for filtration,But many sewage is heavy metal or nitrogen exceeding the standard,Too small,Ordinary membrane can't purify,Reverse osmosis membrane can,But the cost is too high and too high,Who can't afford it.You can think of a ton of water, dozens or even hundreds of pieces of waste,Who used it?There is one technology for membrane technology to treat sewage,It's called trunk,But not filtering,Instead, Catalyst is added to the membrane to catalytic degradation of harmful substances in water and so on.Therefore, filtering technology cannot be counted.And liquor is not a very mature technology,It is usually used to treat organic wastewater,There is nothing to do with inorganic wa