. Squeezing pressure is too low, then the lower weld together. Squeeze caused by low pressure factor is integrated, there are factors that have mold on the process. There are several situations: a squeeze relatively low. To improve the welding together can take the following methods: 1 / thickening of the upper mold 2 / porthole appropriately reduced 3 / extrusion temperature appropriate to reduce the normal hollow profile extrusion temperature of 460-500 ℃, can be reduced to 420-440 ℃ . This method is very useful in the field. 4 / Select a large square bar aluminum extrusion barrel price is about the profile extrusion arranged on large models. 5 / welding chamber depth and selection (by the shunt bridge "sink" approach). But pay attention to the bridge will reduce the extrusion pressure sink aluminum square bar supply manufacturers, thus making this method when you want, depending on the circumstances. For the use of "+ yu" shunt-mode bridge structure more effective. Porthole irrational, unreasonable diversion bridge design and processing. Should try to make the weld to the corners or decorative surfaces on the list, and the use of drip-shaped bridge and shunt reasonable welding angle, so that the solder joints on the welding chamber falls flat (ie, pre-formed district); the use of a "+ yu "bridge structural arrangement porthole square bar stock aluminum manufacturers, like this case, the bridge can be narrower in the middle, and Shen bridge (deepen local welding chamber depth) 5-8mm. aluminum square bar stock manufacturers, aluminum square bar, rolls Alcoa Aluminum Co., Ltd. is provided by Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) strong, credible, in Jinan, Shandong aluminum products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rolls in aluminum and you hand into the brilliant, for a better future!