Claims
- 1. A core assembly adapted for use in foundry practice comprising a plurality of cores, with the cores being joined together by at least one connecting area which comprises a male portion integrally formed on one of the joined cores and a female portion integrally formed on the other of the joined cores, with the male portion being closely received in the female portion, and a clamping member positioned between the male and female portions of the connecting area to produce a clamping effect therebetween.
- 2. The core assembly as defined in claim 1 wherein said clamping member comprises a formable initially flat sheet which is adapted for being placed or slipped on the male portion or being placed or inserted over the female portion so as to develop said clamping effect during the insertion of the male portion into the female portion.
- 3. The core assembly as defined in claim 1 wherein the male portion is in the form of a cone or frustrum, and the female portion is in form of a conical or frustoconical recess.
- 4. The core assembly as defined in claim 3 wherein the core or frustrum of the male portion has an extremely small angle of inclination of its circumferential surface.
- 5. The core assembly as defined in claim 1 wherein the clamping member is in the form of a closed or open sleeve.
- 6. The core assembly as defined in claim 1 wherein the clamping member is in the form of a closed or open ring.
- 7. The core assembly as defined in claim 1 wherein the clamping member comprises a formable initially flat sheet having a generally circular center portion and a serrated, fringed, or star shaped outer edge portion.
- 8. The core assembly as defined in claim 7 wherein the outer edge portion of the flat sheet is star shaped and formed by triangular segments which radiate from the center portion, with the triangular segments being configured so as not to overlap when adapted to the shape of the connecting area.
- 9. The core assembly as defined in claim 1 wherein the clamping member comprises a soft material that is essentially adaptable to the shape of the connecting area.
- 10. The core assembly as defined in claim 1 wherein the clamping member comprises a sheet which is sufficiently thick to receive therein small core sand particles.
- 11. The core assembly as defined in claim 10 wherein the sheet is composed of a material selected from the group consisting of cellulose, paper, cardboard, plastic, and soft metal.
- 12. The core assembly as defined in claim 10 wherein the sheet is configured to be non-uniform on at least one of its two opposite surfaces.
- 13. The core assembly as defined in claim 10 wherein the sheet has a coating on at least one of its two opposite surfaces.
- 14. The core assembly as defined in claim 13 wherein the coating is a soft material.
- 15. The coating assembly as defined in claim 13 wherein the coating is an adhesive.
- 16. The coating assembly as defined in claim 10 wherein the sheet is expandable in a defined manner.
Priority Claims (3)
Number |
Date |
Country |
Kind |
199 23 856.1 |
May 1999 |
DE |
|
299 20 419.7 |
May 1999 |
DE |
|
199 55 957.0 |
Nov 1999 |
DE |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation of PCT/DE00/01651 filed May 23, 2000, and designating the U.S.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/DE00/01651 |
May 2000 |
US |
Child |
09994329 |
Nov 2001 |
US |