How to remove the metal spinning product  is a important technology ,metal spun part needs to take off from mold smoothly after spinning in the production ,if the demould of mold design is wrong ,the product is hard to take off or it's surface will be scratches after removed. metal spinning removed effect the quality and efficiency of production ,now we introduce several remove ways to help you to make it better .

Why the metal spinning is difficult to take off from the mold 

① Flange : If the metal spinning part with a wide flange is more than 30mm. the spun deformation of metal springback in flange position will hold the mold tightly .

② Cylinder height is more than 100mm : There is vacuum between mold and spun parts ,the interior pressure is less than exterior , so it stops spun part to remove .

③ Aluminum spun touch the mold tightly : The aluminum is less internal tress spring back ,so aluminum spun part can hold the mold tightly .

How to remove the metal spinning products 

① Air pressure remove  

Air pressure remove is a basic way to take off the metal spun product after metal spinning ,the CNC metal spinning machine design the air pressure pipe to assemble into the mold .the air pressure can be set different value .the air pressure can form a push force to push the metal spun part out from the air pressure holes ( you can check in the left image above ).

② Hydraulic pressure remove 

When cylinder height of metal spinning product  is more than 200mm ,it is hard to remove the metal spinning product .You can use the hydraulic and spinning cylinder to offer push force to remove ,you can design the pull part like the image to demold ,Pull part connect the spinning and hydraulic cylinder by a long pole , this cylinder can spining follow the spindle ,when the spindle stop working after finishing spinning ,the spinning and hydraulic cylinder will offer the push force to push the Pull part ,the pull part will take off the spun part togather from the mold .

③ Design a demold cone 

If the customer allow the design change ,you can use the demould cone in the image above ,it help to reduce the vacuum situation and it can be took off easlily.

④ Sample remove 

You can heat the metal spun part to increase the diameter of metal spinning products ,then you can use the air pressure to take off.

⑤ CNC program adjust 

You need to judge the gap between mold and spun part, which position is least with mold where is hold tightly .you can use a little hammer to beat this position ,if the sound is litte that improve the gap is less , you can increase the gap of this position in CNC program ,so the diameter of this position will be bigger and it is took off easily .