1, the production technology behind the current domestic impact Sand, mostly imitation, less developed, started earlier but slow development, the manufacturers of similar products. While with the price advantage in the market to take advantage of the number of sales, compared with foreign advanced level is still lagging behind in terms of technical quality: Domestic Sand wearing parts (butt head, manifold, bearing plate, back plate, impeller body) life expectancy is lower than the foreign advanced products. 2, made a number of sands, but generally small scale, low management level. The sand there are many companies in various parts of China, but are generally less natural mechanisms mining more production, fewer small-scale production of large scale informal enterprises, which caused great difficulty for the management of sand industry. 3. The need to improve standards. Compared to other industries, policy and planning on the introduction of small gravel, part of the policy and the relevant provisions of the relatively backward. People on the concept of sand to cement production lighter. This restricts the production of sand in large part. Sand from the hopper, sub-feeder, whirl crushing chamber, composed of seven parts of the impeller body, spindle assembly, chassis, transmissions and motors. Transmission part, the current mainstream configurations with single or dual motor drive motor belt drive mechanism (75kw or more, for dual-motor drive), dual-motor drive two motors were installed on both sides of the spindle assembly, two motor pulley and belt spindle pulley connected to the spindle on both sides of the balance of power, no additional torque. Abstract: Sand able to start at the main or a comprehensive ban on Chinese popular river sand dug from China. In 2005, the state issued a series of regulations crusher manufacturers, large-scale ban on river sand excavation behavior, for a time, resulting in a sand source of tension, in addition to a small Sand, sand than natural sand greater than surface area, the higher the preparation of concrete with sand strength. Secondly, sand production can be combined with gravel production process, greatly reduce production costs mechanism sand. Finally, sand Sand beneficial utilization of mineral resources, not only to solve environmental problems and improve the utilization of natural resources. Efficient crushing machine plays an irreplaceable role as the sand core production line of broken equipment. Faced with these phenomena and problems, sand production will have a significant market opportunity, manufacturing high-quality sand and gravel in order to become a gold industry. Sand manufacturers, Leshan Sand, Yuxin Senda provided by Henan new Senda Heavy Machinery Co., Ltd.. Henan new Senda Heavy Machinery Co., Ltd. (www.hnsdzg.com) strong, credible, in Zhengzhou crushing grinding equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yuxin Senda and you hand into the brilliant, for a better future!