Die and die device

A die, comprising:

• a die body having an outermost side portion and provided at its upper portion with a die hole;
• a discharge hole formed in the die body and having a diameter larger than that of the die hole;
• a peripheral groove formed at an outer peripheral surface of the die body and at an upper portion higher than the middle height portion of the die body, so that an inclined surface is formed at the peripheral groove;
• and
• an inclined air injection hole having an upper end and a lower end, the upper end being opened into the inclined surface so as to breaking through the inclined surface, the lower end being opened into a lower portion of the discharge hole, so that the air injection hole is configured to inject air from the upper end into the discharge hole downwardly through the lower end of the air injection hole.
• wherein the lower end of the air injection hole is located at a lower portion lower than the middle height portion of the discharge hole.