Porthole design is too large (especially for low profile extrusion ratio), so that the pressure is reduced crowded square rod manufacturers specializing in the production of aluminum, thereby reducing the welding force. Recommendation from the edge of the vent hole extrusion cylinder wall at least 6-10mm distance. Shunt hole course selection and diversion structure of the bridge would be better considered together. 2. welding chamber volume is too shallow or too small, can not form a sufficient hydrostatic pressure. Reasonable under guarantee core rigidity and strength of the premise of Jinan aluminum square rod manufacturers, increase the volume of welding chamber. Welding chamber can be increased cross-sectional area, may also increase the height of the welding chamber. Molding process characteristics of different materials 1) and crystallization shrinkage coefficient of linear expansion of aluminum 2 times greater than steel, is easy to produce high welding deformation and stress. 2) linear expansion coefficient than the stainless steel large, such as austenitic stainless steel linear expansion coefficient of 40% larger than the carbon steel. Should be carried out before 3) austenitic stainless steel molding solution treatment Shandong Aluminium square bar suppliers, in order to reduce the hardness, reduce deformation resistance, bending forming an integrated approach should be adopted. Jinan aluminum square bar Suppliers | rolls Aluminum (certified) | aluminum square bar provided by the Aluminum Co., Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) Shandong Jinan, aluminum products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Aluminum leadership in cis with the staff warmly welcome all inquiries negotiations to create a better future for aluminum rolls.