Equipment for making foundry cores
View Patent ↗The present invention concerns equipment ( 1 ) for making foundry cores comprising a mold ( 2 ) provided with one or more core forms ( 3 ) and one or more channels ( 4, 6, 7 ) for conveying core formation material to the core forms ( 3 ). The equipment comprises one or more inserts ( 10 ) housed or able to be housed in the conveying channels ( 4, 6, 7 ) near to the core forms ( 3 ).
1. An apparatus for manufacturing foundry cores comprising,
a mould arranged with a plurality of core boxes,
one or more ducts for conveying core formation material to said plurality of core boxes,
and a plurality of inserts, one or more inserts housed in the one or more ducts in proximity to the plurality of core boxes; wherein said plurality of core boxes are arranged in one or more groups, each group including a plurality of core boxes arranged in series and connected together through connection channels,
wherein one or more of the plurality of inserts are arranged in one or more of the connection channels such that the formation material does not solidify or does not completely solidify remaining at least partially friable in the presence of said insert.
2. The apparatus of claim 1 , wherein the plurality of inserts the one or more inserts limit the transmission of heat coming from the mould where the plurality of inserts are housed.
3. The apparatus of claim 1 , wherein the plurality of inserts have a thermal conductivity less than the thermal conductivity of the mould.
4. The apparatus of claim 1 , wherein the plurality of inserts and the mould are comprised of different materials.
5. The apparatus of claim 1 , wherein the plurality of inserts comprise aluminium titanate.
6. The apparatus of claim 1 , wherein the plurality of inserts and the one or more conveying ducts are arranged according to one or more conveying duct groups, each of said conveying duct groups comprising one or more core boxes mutually connected by one or more connecting ducts of the one or more conveying ducts, and a supply duct of said conveying ducts for supplying the core formation material from the exterior to the interior of the mould.
7. The apparatus of claim 6 , wherein the plurality of inserts are arranged in the one or more supply ducts and/or in the one or more connecting ducts.
8. The apparatus of claim 1 , wherein the conveying ducts comprise insert seats having expanded portions for housing said inserts.
9. The apparatus of claim 8 , wherein the expanded portions are substantially complementary to said inserts.
10. The apparatus of claim 1 , wherein the plurality of inserts comprise portions having a substantially annular shape, so as to define a through-opening allowing passage of the core formation material.
11. The apparatus of claim 10 , wherein the through-openings extend below the transversal extent of the conveying ducts in which the plurality of inserts are housed.
12. The apparatus of claim 1 , wherein the plurality of inserts include side flanges suitable for being received in corresponding mould flange seats.
13. The apparatus of claim 1 , wherein the plurality of inserts are manufactured as a single insert piece.
14. The apparatus of claim 1 , wherein the plurality of inserts are manufactured as two distinct insert pieces.
15. The apparatus of claim 14 , wherein the two distinct insert pieces are substantially mutually the same.
16. The apparatus of claim 1 , wherein the mould includes a first half-shell and a second half-shell which are removably connectable, the one or more inserts being received partially in said first half-shell and partially in said second half-shell when each of said first and second half-shell are connected to form said mould.