Übersetzung für "Kernkasten" in Englisch

The core shooter serves to shoot the basic moulding material mixed with binder into a core box.

The core box is at ambient temperature, at least for the first use.

Internal contours are represented by cores, which are made in a separate core box.

In order to achieve faster ageing during core making, catalysts are added to the moulding sand in the core box...

The invention further relates to a method for core box suitable for making a riser body for use in the core shooter.

After the hot air had been passed through, the core box was separated from the heat source and removed from the core shooter.

By direct sucking off the catalyst gas at the core box the exhaust air rate was reduced to 40%.

For the production of cores, mixed and prepared sand is shot with compressed air in a core box.

The use of a more resistant material for the core box is also not possible for reasons of cost due to the poorer workability of the materials that would be applicable for this purpose.

The term "mold part" in the sense of the invention includes a pattern as well as a core box.

SUMMARY OF THE INVENTION It is an object of the invention to configure a mold part of the above defined type, particularly a core box, in such a way that an increase in the service life together with an increase in throughput becomes possible, with the materials employed in the past still being usable.

A core box 1 having an upper part 2 and a lower part 3 contains a core 5, which is molded therein.

The core box 1 then passes into a further station 8 where it is received by a chamber 9 which is shown only schematically.

The sand formulations so prepared are then charged to an appropriate metal container such as a core box and fully cured, at temperatures between 150° C. and 300° C., within a short time which may range from 60 to 80 seconds, for example.

To achieve very complete drying of the casting moulds, WO 98/06522 proposes leaving the moulding mixture after demoulding in a heated core box only until a dimensionally stable and load-bearing shell around the outside is formed.

Also known from DE 196 32 293 is a method for the production of core blanks for foundry technology, a mixture of an inorganic fire-proof foundry sand and an inorganic binding agent with a water glass base being poured here into a core box and then, in order to solidify the core, the water being withdrawn or gassed with CO 2 .

The invention is therefore based on the object of providing a method as well as a core box for making a riser with the previously described design, by means of which with a simplified procedure, a one-piece riser body can be produced.

The present invention offers the advantage that the core technology for making the inner cavity of a riser body made in a core shooting method is replaced by the king expandable in its outer contour, wherein the space taken up by the expanded king forms the inner cavity of the finished, shot riser body within the cavity implemented in core boxes and reproduces the outer contour of the riser body.

To use this binder system, a heated core box (130° C. to 180° C.) as well as a hot air flush (100° C. to 200° C.) are necessary.

After the core in the core box has reached a certain processing strength, it is completely hardened in a microwave oven at low power.

To this end, a basic moulding material mixed with binder is shot into a core box using a core shooter under pressure and is hardened therein.

Advantageously, this means that energy is saved, since it is not necessary to heat up an entire core box initially and to keep it permanently warm throughout the period it is being used.

In a particular embodiment of the invention, the core box is produced from a material which can be heated up, preferably from steel.