Porthole design is too large (especially for low profile extrusion ratio), so that the pressing force lower Jinan magnesium alloy aluminum prices, thereby reducing the welding force. Recommend vent hole from the edge of the extruder barrel wall has at least 6-10mm distance. Vent hole course selection and bypass bridge structure considered together better. 2. welding chamber volume is too shallow or too small, can not form a sufficient water pressure. Reasonable is to ensure core rigidity and strength of magnesium alloy aluminum factory premise Jinan, increase the volume of welding chamber. Welding chamber can be increased cross-sectional area, it may also increase the height of the welding chamber. Pollution aging process acid in rust Jinan magnesium aluminum alloy, will continue to bring oil or other impurities, which suspended impurities can be removed by scraping fishing methods; when soluble iron exceeds a certain content, in addition to the bath rust effect will not only greatly reduced, and an excess of iron ions with the surface of the mixed phosphate residue tank, accelerated aging phosphate bath pollution, seriously affecting the quality of the workpiece phosphate, general acid iron ion content should be controlled In no more than 6% to 10% is appropriate. Bath must be replaced when more than control targets. Magnesium aluminum alloy, magnesium alloy aluminum Jinan Heshun Alcoa (certified merchants) are provided by Jinan Heshun Aluminium Limited. Jinan Heshun Aluminum Co., Ltd. (www.jnhsly.com) (www.jnhsly.cn) in the field of aluminum products devoted boundless enthusiasm and passion, rolls Alcoa has been customer-centric, for customers to create the concept of value, quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcomed the inquiry, Contact: Zhang.