Protective leaching mask assemblies and methods of use
Embodiments of the invention relate generally to overmolded protective leaching masks, and methods of manufacturing and using the same for leaching superabrasive elements such as polycrystalline diamond elements. In an embodiment, a protective leaching mask assembly includes a superabrasive element including a central axis and a superabrasive table, and a protective mask overmolded onto at least a portion of the superabrasive element. The protective mask includes a base portion and at least one sidewall extending from the base portion and defining an opening generally opposite the base portion. The at least one sidewall includes an inner surface configured to abut with a selected portion of the superabrasive element being chemically resistant to a leaching agent and an outer surface sloping at an oblique angle relative to the central axis.
1. A protective leaching mask assembly sized and configured for covering a superabrasive element including a superabrasive table, a rear face, and a side surface, the protective leaching mask assembly comprising:
a protective mask being chemically resistant to a leaching agent, the protective mask including:
a base portion; and
at least one sidewall extending from the base portion and defining an opening, the at least one sidewall including:
an inner surface adjacent to a selected portion of the side surface of the superabrasive element; and
an outer surface spaced from the inner surface of the at least one sidewall, the outer surface including a binding member loading portion having a generally constant diameter; and
a binding member in contact with the binding member loading portion of the outer surface of the at least one sidewall, the binding member configured to compress the inner surface of the at least one sidewall against a selected portion of the superabrasive element;
wherein the binding member is chemically resistant to hydrofluoric acid.
2. The protective leaching mask assembly of claim 1 , wherein:
the at least one sidewall of the protective mask includes a top edge positioned opposite to the base portion; and
the binder member loading portion is located between the top edge and a location between the superabrasive table and the base portion of the protective mask.
3. The protective leaching mask assembly of claim 1 , wherein the binding member is sized to generally correspond to the binding member loading portion.
4. The protective leaching mask assembly of claim 3 , wherein:
the binding member includes an upper surface, a lower surface, and a height dimension between the upper surface and the lower surface; and
the binding member loading portion includes a height dimension that is substantially equal to the height dimension of the binding member.
5. The protective leaching mask assembly of claim 1 , wherein:
the base portion includes an inner surface adjacent to the rear face of the superabrasive element and an outer surface spaced from the inner surface of the base portion; and
the binding member is not in contact with the outer surface of the base portion.
6. The protective leaching mask assembly of claim 1 , wherein the protective mask is overmolded onto the superabrasive element.
7. The protective leaching mask assembly of claim 1 , wherein the binding member is positioned with an interference fit with the outer surface of the at least one sidewall.
8. The protective leaching mask assembly of claim 1 , wherein each of the binding member and the protective mask includes at least one material selected from the group consisting of a polymer, a metal, an alloy, a shape memory material, and a composite material.
9. The protective leaching mask assembly of claim 1 , wherein the binding member and the protective mask are made from different materials and the binding member exhibits a greater flexural modulus than the protective mask.
10. The protective leaching mask assembly of claim 1 , wherein the binding member includes one or more resilient materials configured to compress the protective mask.
11. A protective leaching mask assembly, comprising:
a superabrasive element including a rear face, a side surface, and a superabrasive table having a chamfer; and
a protective mask being chemically resistant to a leaching agent, the protective mask including:
a base portion; and
at least one sidewall extending from the base portion and defining an opening that receives at least a portion of the superabrasive element therein, the at least one sidewall including:
an inner surface adjacent to a selected portion of the side surface of the superabrasive element; and
an outer surface spaced from the inner surface of the at least one sidewall, the outer surface including a binding member loading portion having a generally constant diameter; and
a binding member in contact with the binding member loading portion of the outer surface of the at least one sidewall, the binding member configured to compress the inner surface of the at least one sidewall against a selected portion of the superabrasive element.
12. The protective leaching mask assembly of claim 11 , wherein:
the at least one sidewall of the protective mask includes a top edge positioned opposite to the base portion; and
the binder member loading portion is located between the top edge and a location between the superabrasive table and the base portion of the protective mask.
13. The protective leaching mask assembly of claim 11 , wherein the binding member is sized to generally correspond to the binding member loading portion.
14. The protective leaching mask assembly of claim 13 , wherein:
the binding member includes an upper surface, a lower surface, and a height dimension between the upper surface and the lower surface; and
the binding member loading portion includes a height dimension that is substantially equal to the height dimension of the binding member.
15. The protective leaching mask assembly of claim 11 , wherein:
the base portion includes an inner surface adjacent to the rear face of the superabrasive element and an outer surface spaced from the inner surface of the base portion; and
the binding member is not in contact with the outer surface of the base portion.
16. The protective leaching mask assembly of claim 11 , wherein the protective mask is overmolded onto the superabrasive element.
17. The protective leaching mask assembly of claim 11 , wherein the binding member is positioned with an interference fit with the outer surface of the at least one sidewall.
18. The protective leaching mask assembly of claim 11 , wherein each of the binding member and the protective mask includes at least one material selected from the group consisting of a polymer, a metal, an alloy, a shape memory material, and a composite material.
19. The protective leaching mask assembly of claim 11 , wherein the binding member and the protective mask are made from different materials and the binding member exhibits a greater flexural modulus than the protective mask.
20. The protective leaching mask assembly of claim 11 , wherein the binding member includes one or more resilient materials configured to compress the protective mask.