CN1202401A

CN1202401A - Method and apparatus for casting metal wires, bars and tubes in upwardly direction

Info

Publication number: CN1202401A
Application number: CN98107778A
Authority: CN
Inventors: 马尔库·科伊维斯托
Original assignee: Outokumpu Oyj
Current assignee: Outokumpu Oyj
Priority date: 1997-04-29
Filing date: 1998-04-28
Publication date: 1998-12-23
Anticipated expiration: 2018-04-28
Also published as: DE69807280D1; JPH10328787A; CN1086968C; FI112447B; RU2203769C2; FI971818A; EP0875317B1; DE69807280T2; FI971818A0; TW403680B; KR19980081807A; EP0875317A1

Abstract

The invention relates to a method and apparatus for casting particularly non-ferrous wires, bars and tubes continuously upwards, but the casting is not carried out vertically but in an inclined position. After the primary cooler, the cooling of the cast product takes place as direct water cooling.

Description

Along upward to the method and apparatus of cast metal silk, bonding jumper and metal tube

The method and apparatus that the present invention relates to particularly is used for along upward to casting nonferrous metal silk, bonding jumper and metal tube continuously, but this casting is not vertically to carry out, but along certain incline direction up.Behind a cooler, again product is carried out direct water-cooling.

Be that the cooler that corresponding apparatus comprises and the casting spout links to each other also comprises second cooler silk, bar or the pipe fitting vertical casting that makes progress in traditional vertical casting method.When casting the silk material of 8mm for example (in the copper wire casting, 8mm is the most general diameter), the length overall of these two coolers is about 2m.The metal of casting cooler (particularly length approximately for this reason cooler always be about 1～5% nozzle-end) in generation crystallization and once cooling off.Secondary cooling then occur in the top of a cooler and the recoler opened in one minute in, the latter constitute again the cooler length overall pact half.The top of this cooler and recoler are comprising shell, cooling water distributing pipe and interior pipe.Cooling water is outside interior pipe, and silk material to be cast is then interior.At interior pipe and treat to set out the space between the casting silk material, so that blank can unhinderedly take out.The heat conduction takes place on the gap of waiting to cast between a part and the interior pipe.

In this traditional vertical casting method, production line be the factor that appreciable impact is arranged than high cost, particularly when relating to limited production scale, this is because must provide member in the mode that is same as the large scale of production production line.By improving the expense that casting speed can reduce production line, coiled pipe number and cooler number under this situation should reduce.But the poor efficiency of secondary cooling then is an impediment to the raising of casting speed.When blank just comes out and when too hot from cooler, its surface is oxidized and blackening, thereby becomes underproof in further refining.For diameter is the unoxidized casting silk material of 8mm, and when cooler is pure, and the enough underground heat of cooling water, when the quality of melt was qualified simultaneously, maximum casting speed for example was about 5m/min.Cooling off in all obstacles that run into for improving secondary, will point out at first and can not cause interior control excessively tightly that this is because blank can be moved freely; Silk material diameter owing to casting when secondly making cooler oversizely quite carefully also is disadvantageous.Elongated filament length is easy to the impulse form that lax casting machine forms, and this has remarkable influence to silk material amount.

Method and apparatus of the present invention is developed in particular for the needs of small-scale production capacity.In this method, product to be cast is that silk material, web or tubing are with different in traditional casting method vertically upward, it is vertical axis with respect to casting furnace, preferably become 30～60 ° angle to cast by 20～85 ° of the one-tenth of the position on being tilted to, only provide a cooler to every rhizoid material simultaneously, the secondary cooling then is directly to carry out on blank to be cast.The invention still further relates to corresponding apparatus.Key features of novelty of the present invention can be recognized from the appended claim book.

The method according to this invention, casting spout and cooler are to be immersed in the melt with obliquity, make be ejected on the cast article as secondary cooling water can be poured into outside the founding furnace wall casting of heat product on.In addition, the silk material that comes out from cooler does not need to do too many bending towards the cooler direction.

For this reason, equipment of the present invention has adopted a kind of cooler of weak point, and this means that actually this kind cooler includes only the vertical cooler of making in the casting technique of tradition.Purpose of this short cooler just is used for from its melting heat of metal cooling of being cast, and carry out preliminary slightly cooling with cast product in form robustness.On the top of the hot-cast part of emerging, then there is injection water to realize secondary cooling and the temperature of product is reduced to be enough to make oxidation no longer takes place from cooler.On the top of this cooler, introducing before the secondary cooling in its aperture has certain suitable protective gas such as nitrogen, in order to anti-oxidation.

Further specify equipment of the present invention referring to the accompanying drawing 1 of illustrating operation principle of the present invention with cross-sectional diagram form below.

The Casting Equipment of Fig. 1 at first includes casting furnace 1 and supporting member thereof.Cooler 4 and casting nozzle partly are inserted in wherein, and are immersed in the contained melt of this casting furnace with about 45 drawing situation by obliquity.The secondary cooling segment of this cast article comprise water jet 8 and be positioned at this cast article and crooked drum under be used for reclaiming the end slot 9 of the water that water jet sprays.From then on also can see among the figure,, introduce the protective gas screen with anti-oxidation along the distance between suitable for reading 10 and secondary cooling end of a cooler.The obliquity of above-mentioned spout allows to adopt the direct water jet outside this founding furnace wall.

As shown in the figure, this newly developed simple in structure and highly low, thereby production process is easy to control.When foundation the present invention had only adopted a cooler around cast article, this cooler construction only had 1/4 height of conventional cooler height approximately.In addition, direct water-cooling is very effective, the result can make the casting speed be higher than in the conventional method and can not make the cast article oxidation.This itself causes cooler number and coiled pipe number to reduce, thereby has reduced cost.

In a cooler of this a kind of equipment of developing now, only from cast article, reclaim about 60% heat, this means that required cooling water inflow has reduced about 40%.Last cooling is to spray water by direct spout, and this just need not have and is similar in cooler to the high-purity of water with to the temperature requirement of water.

Particularly in the casting machine of small-scale production scale, each cast article all has its specific operation motor, just can not have any problem when at this moment starting each cast article respectively in deceleration.On the other hand, because each cast article all has the operation motor of himself, the size of motor just can be selected very for a short time and the reduction expense.When the material that is used to melt is sent in the casting furnace and spout when enough submergences are arranged the independently height adjusting system that also can cause cost to increase in this casting machine in uniform mode.

Claims

1. along upward to the method for casting nonferrous metal wire rod, web and tubing, be characterised in that casting is upwards to carry out when the angle with respect to the casting furnace vertical axis is 20-85 °.

2. the described method of claim 1 is characterised in that, the cooling of cast article also is directly injected to water on this cast article and cools off as secondary except cooling off for the first time in casting nozzle.

3. the described method of claim 1 is characterised in that, casting be in 30～60 ° angle on carry out.

4. the described method of claim 1 is characterised in that, the first cooling zone and the zone between the secondary cooling zone at cast product place are to be surrounded by protective gas.

5. along upward to the equipment of casting nonferrous metal wire rod, web or tubing (5), this equipment comprise casting furnace (1) and thus on the primary cooler (4) that draws, and be positioned partially at casting nozzle (3) in the primary cooler, be characterised in that primary cooler (4) and part casting nozzle (3) located therein is arranged to get 20～85 ° of from then on molten casting stoves in angle upwards with respect to this casting furnace vertical axis.

6. the described equipment of claim 5 is characterised in that, it is upwards to be provided with from casting furnace by 30～60 ° angle that primary cooler (4) and part are positioned at wherein casting nozzle (3).

7. the described equipment of claim 5 is characterised in that, in treating the direction of advance of cast product, is provided with secondary cooling end that comprises direct water jet (8) and the chute (10) that is used to reclaim this water afterwards at primary cooler (4) mutually continuously.

8. the described equipment of claim 7 is characterised in that, above-mentioned secondary cooling end is positioned at the outside, furnace wall of casting furnace (1).