Compression molding die for I-shaped part

A compression molding die for I-shaped part, the I-shaped part comprises a middle shaft, an upper wing plate and lower wing plate;

• the middle shaft has an outer diameter (f) and a height (e);
• each of the upper wing plate and the lower wing plate has a diameter (d) and a height (g);
• and,
• (d) is greater than (f) wherein:
• the molding die comprises:
• an outer mold with an inner diameter (d), an upper pressing disc, a lower pressing disc, a huff mold, an upper mold and a lower mold, wherein each of the upper pressing disc, the lower pressing disc and the huff mold has an outer diameter (d) and an inner diameter (f);
• the upper pressing disc, the huff mold and the lower pressing disc are vertically arranged in the outer mold at an interval;
• the upper mold extends into the upper pressing disc;
• the lower mold extends into the lower pressing disc;
• and
• a mold cavity is surrounded by the outer mold, the upper mold, the upper pressing disc, the huff mold, the lower pressing disc and the lower mold, wherein,
• an outer periphery of a lower end of the upper mold is step-shaped, an axle journal with a smaller diameter at the lower end of the upper mold extends in the upper pressing disc;
• an outer periphery of an upper end of the lower mold is step-shaped, and an axle journal with a small diameter at the upper end of the lower mold extends in the lower pressing disc;
• a plurality of support rings which are nested in turn are provided;
• an annular slot is formed at an upper end of an inner periphery of each of the support rings;
• the support ring with a smaller diameter is nested in the annular slot of the support ring with a greater diameter the lower pressing disc is located in the annular slot of the support ring with the smallest diameter;
• and
• an axle journal with a greater diameter at an outer periphery of the lower end of the lower mold penetrates through the support ring with the smallest diameter, and the support ring with the greatest diameter is arranged on a mold rack.