Q: direct extrusion is the use of toothpaste type of the material to the extrusion direction on the method is?
A: forward extrusion refers to, the heated to a proper temperature alloy into the ingot holding cylinder, using
an extrusion rod alloy pressure to the direction of mold, and the alloy was formed through the mold holeshape
of the prescribed method.
Q: extrusion aluminum alloy should be a great deal of pressure. If it is in accordance with the above method,
the case of the ingot cylinder and the alloy will produce friction, in order to squeeze the internal alloy of the
ingot, it is a lot of pressure, right?
A: so the forward extrusion, the alloy is very easy to produce metal flow is not uniform.
Q: anti extrusion will not occur in the case of uneven metal flow?A: the structure of the backward extrusion is a structure of the billet and the cylinder.Therefore, the ingot tube
and the alloy will not produce friction, can save 30% of the extrusion pressure, but compared to the forward
extrusion, backward extrusion of metal flow will be more uniform.