Les défauts dus au retrait restant

Les défauts dus au retrait restant à l’intérieur de la pièce, appelés « retassures », sont des cavités que le métal liquide n’a pas pu remplir pendant la solidification. Ce sont des zones où une poche de liquide est restée isolée : la cavité se situe généralement au sommet de la poche de liquide. Pour qu’une poche de métal liquide se trouve isolée, il faut donc que le procédé de remplissage du moule soit incompatible avec les formes de la pièce. La présence d’autres défauts (impuretés, bulles de gaz,…) peut aussi perturber la solidification et piéger le métal liquide3,4

結果 (英文) 1:

defects due to shrinkage remaining inside of the room, referred to as "voids" are cavities that the liquid metal could not complete during solidification. These are areas where a pocket of liquid remained isolated: the cavity is usually at the top of the pocket of fluid. for a pocket of liquid metal is isolated,it is necessary that the process of filling the mold is incompatible with the shape of the room. the other defects (impurities, gas bubbles, ...) may also disturb the solidifying metal and sequester liquide3, 4

結果 (英文) 2:

Defects due to removing remaining inside the room, called 'voids', are cavities that liquid metal was unable to fill during solidification. These are areas where a pocket of fluid remained isolated: the cavity is usually at the top of the pocket of fluid. So a pocket of liquid metal is isolated, Therefore, the filling of the mold process is incompatible with forms of the piece. The presence of other defects (impurities, bubbles of gas,...) can also disrupt the solidification and trap metal outlay.3, 4

結果 (英文) 3:

Defects due to the withdrawal remaining inside the part, called “shrinkage pipes”, are cavities which the molten metal could not fill during solidification. They are zones where a pocket of liquid remained isolated: the cavity is generally located at the top of the pocket of liquid. So that a molten metal pocket is insulated,it is necessary thus that the process of filling of the mould is incompatible with the shapes of the part. The presence of other defects (impurities, bubbles of gas,…) can also disturb solidification and trap metal liquide3,4