Die-casting piston, and die-casting apparatus incorporating same
A piston of a die-casting apparatus includes: a piston tip having a generally cup-shaped body having an inner front face and an inner cylindrical surface, the inner front face having a plurality of grooves formed therein for conveying cooling fluid; and an inner piston carrier coupled to the piston tip, the carrier comprising an elongate forward portion matingly engaging the piston tip.
1. A piston of a die-casting apparatus, the piston comprising:
a piston tip having a generally cup-shaped body having an inner front face and an inner cylindrical surface, the inner front face having a plurality of grooves formed therein for conveying cooling fluid; and
an inner piston carrier coupled to the piston tip, the carrier comprising an elongate forward portion matingly engaging the piston tip,
wherein the grooves comprise curved grooves extending from a center of the inner front face to a periphery of the inner front face.
2. The piston of claim 1 , wherein each curved groove extends within only one quarter of the inner front face.
3. The piston of claim 1 , wherein the grooves further comprise a recess at the center of the front face.
4. The piston of claim 1 , wherein the forward portion of the carrier comprises:
a generally planar front face comprising an aperture through which cooling fluid is delivered; and
a cylindrical surface having a plurality of additional grooves formed therein.
5. The piston of claim 4 , wherein the additional grooves comprise axial grooves extending from the front face of the carrier.
6. The piston of claim 5 , wherein the axial grooves are formed in an intermediate surface of the cylindrical surface, the axial grooves extending a portion of a width of the intermediate surface.
7. The piston of claim 6 , wherein the intermediate surface extends around a full revolution about the longitudinal axis of the carrier.
8. The piston of claim 6 , wherein the additional grooves further comprise:
a circumferential groove extending around the cylindrical surface rearward of the intermediate surface.
9. The piston of claim 8 , wherein the circumferential groove extends around a full revolution about the longitudinal axis of the carrier.
10. The piston of claim 8 , further comprising at least one duct extending from the circumferential groove into an interior of the carrier.
11. The piston of claim 1 , wherein the piston tip is fabricated of AISI grade 4340 steel, AISI grade 300M steel, or AISI grade 4140 steel, or any compositional equivalent thereof.
12. The piston of claim 1 , wherein the carrier is fabricated of AISI grade 4340 steel, AISI grade 300M steel, or AISI grade 4140 steel, or any compositional equivalent thereof.
13. A die-casting apparatus comprising the piston of claim 1 .
14. The die-casting apparatus of claim 4 , wherein the die-casting apparatus is a vacuum die-casting apparatus.
15. A piston of a die-casting apparatus, the piston comprising:
a piston tip having a generally cup-shaped body having an inner front face and an inner cylindrical surface, the inner front face having a plurality of grooves formed therein for conveying cooling fluid; and
an inner piston carrier coupled to the piston tip, the carrier comprising an elongate forward portion matingly engaging the piston tip,
wherein the forward portion of the carrier comprises:
a generally planar front face comprising an aperture through which cooling fluid is delivered; and
a cylindrical surface having a plurality of additional grooves formed therein, wherein the additional grooves comprise axial grooves extending from the front face of the carrier.
16. The piston of claim 15 , wherein the axial grooves are formed in an intermediate surface of the cylindrical surface, the axial grooves extending a portion of a width of the intermediate surface.
17. The piston of claim 16 , wherein the intermediate surface extends around a full revolution about the longitudinal axis of the carrier.
18. The piston of claim 16 , wherein the additional grooves further comprise:
a circumferential groove extending around the cylindrical surface rearward of the intermediate surface.
19. The piston of claim 18 , wherein the circumferential groove extends around a full revolution about the longitudinal axis of the carrier.
20. The piston of claim 18 , further comprising at least one duct extending from the circumferential groove into an interior of the carrier.