DE1928311A1 - Inlet pipe for casting molds - Google Patents

Description

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Acie τ ie8 Reuniea de Burbaoh-Eieh-Dudelange, Soöleti Aaonyne Luxembourg} Avenue de la Libert !, Luxembourg

Flow pipe for OitSforesn

For this invention, the priority is derived from the Luxembourg one Registration no. 56 · 211 rom 5 * «Do! 1968 to complete

The present invention relates to inlet pipe «for SieSformen, in particular divisible flow pipe · which ensures an even flow rate secure during the entire casting period »

The speed of casting steel through refractory inlet pipes depends essentially on the level of the iron in the casting mold and on the cross-section of the inlet pipe. The reduction in the sieving speed, which usually depends on the step-by-step reduction in the steadiness of the liquid ^s ieana in the casting mold, has been compensated in previous practice by a constant increase in the cross section of the inlet pipe as a result of wear. Ba nan can assume that the wear and tear is proportional to the longevity »there is the possibility of carrying a certain amount of tsrechieiSes when calculating the amount of discharge, but on the assumption that the opening of the egg tube has a medium caliber Reitst, because at

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the diameter of which is in the order of magnitude of lOGrnm and more lies, the outflow quantity can differ from the first bia sur reduce the last mold by half. Di · calculation the outflow volume, which is due to the increase in the diameter of the inlet pipe as a result of wear and tear, let's just look at it! from JJnsioherneiten possible ». in the the rest of the wear itself leads to many lullen i ^ u the formation of gaps and cracks, which in turn is su "ine" Platsen of the neck of the inlet tube can lead. The same damage to the outlet opening of the inlet pipes · » ^ how to cause slagging of the exit opening

Vortex formation on the surface of the pouring stream and ▼ prevent the risk of air infiltration. . .,

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Considering these Sohwierigkeitea dl "present invention provides a Sixdaufrohr -ROR, AEMM during the entire period dee QieSrorganges a constant Auafluß as alcherstellt a smooth, non-turbulent Oießetrahl.

The construction of the inlet pipes according to the present invention differs from the inlet pipes previously used by the fact that they are in the horizontal direction "divided into individual sections during the casting process will. This kind of goal opening offers the goal part that one the damaged and slagged ones according to the pouring process Switch off parts of the shark of the Sinlaufrohres and in this way ensure an eddy-free Giefietray can. As before, the casting speed can be constant can be kept, although the constant »enlargement of the cross-section of a cylindrical inrun proferee as a result The wear and tear put in evidence, but it is it is much more advantageous to use such an egg cone to his su-: to take flight whose pouring hole has a conical Jbrm, since it is possible under these circumstances to file an attack against the » choose a more wear-resistant, fireproof material,

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for the progressive enlargement of the diameter of the Opening through subdivision resembles the reduction in the level of the liquid iron in the form of the mold and ensures a practically smooth convoluted surface.

Except for sinusoidal pipes with conical and smooth diefilooh can you can also use inlet pipes, which consist of two or more conical stumps lying on top of one another, whereby the lower part of a cone tump a little stronger τβrjungt let alB the upper part of the following cone tune « In this pail the subdivision can be made at the height of the connection between two successive truncated cones.

The successive subdivision of the neck of the inlet pipe β can be vorgenaraaen according to the circumstances, which of the type and dimensions of the Sinlaufzohree, the Tolueen the semolina form and the number of the ingots pouring as well depend on the nature of the steel, and «was ß * ch dem Pour a single or multiple bars. Oils subdivision itself is done with the help of a dividing device fastened under the Gleflfora or in some other device, in the feennik known way.

Subdivision of the opening of the inlet pipes to the desired extent can take place immediately after the start of the process. This means that there is no need to worry about the nature of the batch. has brought, since the conical inlet pipe according to? ¹ invention can easily be subdivided in such a way that the desired casting speed can be achieved with a given batch. In addition, some inlet pipes according to the present invention can be used to offer the large number of classic inlet pipes with a veneered diameter.

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Ihi the inrun pipes more resistant in maohen and dl · bite formation. And dme plates dt «Hal · ·· dee blue flow pipe ·· su diminish, and« was eowobl during the GleßTorgange al · also nutrient dtr subdivision, is according to an execution form of the invention, the exterior of the inlet pipes is surrounded by a cover. The Tateaehe de · Einhüllen · or de · ttofangene of the inrun pipes with the help of a Schutshüll · or duroh Fixed supports allow the thickness of the wind to be reduced. The bleed cover can have a cutout their number and their distance from one another depending on) the number of subdivisions, while the pouring gate take place, be chosen · Dl · ·· Butene make dl · subdivision easier and faster.

The success of the present invention was achieved nioht duroh den Durchneeser, dl · form or dl · beeo texture the inlet pipes limited. 7ersohiedenarbeiten dee Durohmefeers, which are selected depending on the desired casting speed, among other things, do not prevent the application of the present invention in any way. Se should be emphasized inmerhla that inflow pipes τοη thick dimensions · 1η · Reinforcement by means of a solid sheet metal to a greater extent . leave them alone. The shape of the Oießlooh ·· of the Binlaufrohre · "can be cylindrical or conical β;" the beds are grounded Results obtained from old conical inlet pipes. The invention can also be applied to inlet pipes with just as much success use with several channels, drain pipe can also be used Silicon, magneau or aluminum bonds, but ooh consist of graphite or any other material »oils can also have a mixed composition. In principle, the nature of the material is not critical from the point of view of the present invention. Ss 1st nevertheless advisable not to correspond to the widespread Beatreben, to give the inlet pipes a certain easy abrasion, in order to enlarge the cross-section of the Inlet pipes become exposed due to wear during casting

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to maintain an even discharge, Rather, use conical inlet pipes that have a subject to possibly low price. Daa Sineetsen'dee Inlet pipe into the upper mold can τοη outside or from the inside the casting mold also take place.

As for the quality of the obtained bars, eo a very considerable reduction in the missing parts can be determined. The same is, albeit in lesser * Extent, the case in terms of the number of Querrieee on the Ingots when taking out of the Ibra or with prehistoric parents

The accompanying drawing illustrates one embodiment of the invention. The inlet funnel consists of the upper part 1 and the lower part 2.

The lower part is tapered at 3 in the shape of a truncated cone. This ensures an even flow of the casting compound. The length of the lower part 2 of the inlet tube bleed eur taper 3 and below it should each time be about the same to aeohefaohe the respective inner drilling diameter.

The upper part 1 1st at the Sinus end 4 expanded arcuately, over to be able to take in the Qussmasae with certainty.

The lower part 2 is in the illustrated Aueftthrungeförji a «protective sheath 5 made of bleoh surround, over a ü of the enema ro hrea mil; Preventing security.

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Claims (7)

Claims 1. Inlet pipes for casting molds, characterized in that when pouring in Ibrmen in horizontal bio-direction or divided several times, at each gate or during the pouring process. 2. Inlet pipes according to Aneprooh 1. characterized in that • ie attached through a cloth jacket or through the outside · Beifen more resistant geaaoht and. 3. Inlet pipes naoh claim 2, characterized in that £ the BIeohhüllβ has luten whose saw! and distance τοη-one another τοη depends on the number of subdivisions 4. Inlet pipes according to claims 1 to 3, characterized in that the Gießlooh has a conical Ib ra 5. Inlet pipes according to claims 1 bie 3, characterized in that the Gießlooh consists of several conical sections arranged one above the other, the lower one Part of a · conical section · kept a little tighter is as the upper part of the following cone 6. Inlet pipes according to claims 1 bie 4, characterized in that they have a maximum resistance to Show wear 7. Inlet pipes according to claims 1 to 5, characterized in that they are subdivided with hooves of a Teilrorriohtung or another suitable device · 909886/0993 ÖAD ORiGlNAt