CN1166392A

CN1166392A - Apparatus for intensifying cooling in casting of metal objects

Info

Publication number: CN1166392A
Application number: CN97102416.2A
Authority: CN
Inventors: 马库·赫曼尼; 希波·伊尔马利
Original assignee: Outokumpu Castform Oy
Current assignee: Luvata Castform Oy
Priority date: 1990-10-17
Filing date: 1997-02-03
Publication date: 1997-12-03
Anticipated expiration: 2011-10-16
Also published as: JPH04262836A; CN1066365C; CN1060802A; FI87894B; FI905102A0; DE69117422D1; CN1046876C; JP3276381B2; EP0481380B1; FI87894C; EP0481380A1; FI905102A; DE69117422T2; ES2084749T3; ATE134543T1

Abstract

Disclosed is a device used for high intensity cooling castings in the continuous casting from the bottom to the top. The stopper nozzle of a conticaster is surrounded by a cooler in which an insulating element is arranged. According to the invention, the cooler is provided with at least one guiding element which is arranged in the shell of the cooler and / or connected with the insulating element. The guiding element is better arranged at the front edge height of the coagulated metal liquid. Besides, the guiding element is at least one groove arranged on the cooler shell.

Description

The device of fierce cooling foundry goods in the metal casting

The present invention relates in metal casting, especially by the bottom device of fierce cooling foundry goods in the continuous vertical casting up.

For example in the U.S. Pat 3746077 disclosed vertical continuous uphill casting methods, cooler is as shown in Figure 1 used in the cooling of metal casting usually.The coolant inlet of cooling agent wherein by near the cooler outer wall, being provided with, from the overhead stream of cooler to the bottom.In cooler, be provided with intervalve, make cooling agent its outlet of leading when rising at cooler inwall place.In Fig. 1, molten metal guiding geat 1; Formed the solidification front of molten metal at height 2 places of geat, molten metal solidifies at this place.In cooler 3, by means of intervalve 4, cooling agent is at first down led the bottom of cooler by coolant inlet, and then up returns, and to the overhead stream of cooler, discharges from cooler again.Clearly, the thermal content of discharging from geat 1 is the height at solidification front 2 substantially, because in process of setting, metallic state changes and gives out heat according to state-shift.

When the cooler of prior art shown in Figure 1 for example was used for the cast metal silk, at this moment casting speed was than very fast, and the increase that can be observed cast metal silk temperature is the function of time.When casting copper wire with 6 meters/minute speed, after cooling, the temperature on copper wire surface also is higher than 500 ℃.So increasing of copper wire temperature makes the copper wire fracture usually, makes operational quality become bad.The reason of increase in temperature is for example in the thermal expansion of cooler bottom, has produced the gap in the screw thread between geat and cooler like this.In addition, high melting heat capacity makes water surface temperature rising in the cooler under high casting speed, thereby has produced heat insulation steam bubble at the cooling surface of cooler.

The objective of the invention is to eliminate the above-mentioned defective of prior art, a kind of new more reliable device of follow-on operation is provided, make under high casting speed, up vertically connecting in the casting, can more effectively cool off foundry goods especially by the bottom.

For realizing above-mentioned purpose of the present invention, the invention provides a kind of in casting, especially by the bottom device of fierce cooling foundry goods in the continuous vertical casting up, at least the top of continuously cast machine geat is surrounded by a cooler, in cooler, be provided with an isolated component, it has been divided into two parts to cooler, described cooler is provided with at least one director element, this director element be contained in the cooler casing and/or be arranged on cooler in isolated component link to each other, according to the present invention, described director element is at least one guide groove that is arranged on the cooler casing body.

According to the present invention, director element is preferably disposed on the height place that the molten metal solidification front of cooling device is limited, and makes that particularly highly locating cooling effect at this has at least very advantageously strengthened.Simultaneously, also prevent the rising of casting temperature, avoided the product fracture thus.

Director element of the present invention can very advantageously be contained on the housing of cooler and/or on the isolated component that limited by the ANALYSIS OF COOLANT FLOW direction, this isolated component make cooling agent in cooler earlier from the top toward dirty, and then return the upper reaches.When director element is contained in the cooler casing, these elements have formed cooling agent have been directed near the surface that will cool off.So strengthened cooling, also strengthened cooling in the part of solidification front elevation-over.

Use director element of the present invention, cooling agent can very advantageously flow through position the hottest in the continuous vertical casting, can fully use total cooling capacity of cooling agent.Can improve used casting speed like this, and can not increase the temperature of foundry goods and the danger of the foundry goods having avoided causing thus fracture.

The ginseng accompanying drawing describes the present invention in detail below, in the accompanying drawing:

Fig. 1 shows prior art and uses the schematic side elevation of the cooler of the casting machine of continuous vertical casting from bottom to up;

Fig. 2 illustrates the schematic side elevation of a most preferred embodiment of the present invention, and wherein the director element of cooling agent is contained on the housing of cooler;

Fig. 3 illustrates the schematic side elevation of another most preferred embodiment of the present invention, and wherein the director element of cooling agent is contained on the isolated component of cooler.

Fig. 4 illustrates this schematic side elevation that the 3rd most preferred embodiment arranged, and wherein the director element of cooling agent is contained on the housing of isolated component and cooler.

In front the part of prior art explanation has been explained Fig. 1.

Among Fig. 2, cooler 11 is positioned to and surrounds geat 12, makes that the top of geat 12 is cooled at least.Cooling agent as water and so on enters cooler by the import 13 that is arranged in the cooler top.In cooler 11, cooling agent at first flows downstream in the space between the outer wall of cooler 11 and the isolated component 14 that is provided with in cooler along the direction of arrow among Fig. 2.Then, according to the present invention, when cooling agent leads to the height of the molten metal solidification front 15 in geat 12, enter in the guide groove 16 of the basic horizontal in the housing that is arranged on cooler 11, make cooling agent flow in fact inwall, so very advantageously improved cooling effectiveness near the cooler 11 that is in thermal site.Guide groove 16 links to each other with another guide groove 17 again, and in fact the latter parallels with the inner vertical walls of cooler 11.Except

guide groove

16 and 17 takes cooling agent to the thermal site of cooler casing substantially, also be expanded on the surface of thermal site place and the contacted cooler casing 11 of cooling agent.The further like this cooling capacity that improves cooler 11.

The cooling agent that has heated in cooler 11 inwalls and isolated component 14 rises by guide groove 17, and discharges cooler via coolant outlet 18.In the

cooler guide groove

16 and 17 number can according to apparatus of the present invention should be used for determine, can be one or more.

In Fig. 3, cooler 22 is arranged to surround geat 21, and wherein the flow of coolant direction also illustrates with arrow as the mode of Fig. 2.Cooling agent enters in the cooler 22 by import 23, and cooling agent down flows to the bottom of cooler between the outer wall of cooler 11 and isolated component 24.According to the present invention, in the bottom of isolated component 24, be in the height place of the molten metal solidification front 25 in the geat 21 basically, be provided with at least one guide 26, in order to the inwall of cooling agent guiding cooler, very advantageously lead the fierce place of cooling off of inwall requirement.Warmed-up cooling agent is directed to coolant outlet 27 by the space between the inwall of isolated component 24 and cooler 11.Use guide 26 of the present invention, the flow velocity of cooling agent can increase, so cooling effectiveness is better.Equally, the turbulent flow of cooling agent also increases, and therefore very advantageously prevents to produce a vapor film at cooler surface.

In the embodiment of Fig. 4, cooler 31 is arranged to surround the top of geat 32.Cooling agent infeeds by the coolant inlet 33 that the cooler top is provided with, and the space between cooler outer wall and isolated component 34 down flows to the bottom of cooler 31.Inwall for cooler that cooling agent is led, bottom at isolated component 34, basically be in the molten metal solidification front 35 in the geat 32, connecting at least one guide 36, cooling agent be directed to be provided with on the cooler inwall with vertical substantially at least one groove 37 of this inwall in.Because the effect of director element 36 and groove 37, the pressure energy that cooling agent comprised is transformed into function.Like this, when preventing that generation from can reduce the adiabatic steam layer of cooling effectiveness, improved the cooling effectiveness of cooling agent.The warmed-up cooling agent in bottom at the cooler in the hot spot that is in cooler is substantially discharged from cooler 31 by the coolant outlet 38 that is provided with at the cooler top.

Above-mentioned Fig. 2 shows most preferred embodiment of the present invention to Fig. 4, respectively has a multi-form director element.But can understand that in the time of needs, various forms of director elements can be used in the same cooler.

Claims

One kind in metal casting, especially by bottom fierce cooling foundry goods device in the continuous vertical casting up, the conticaster geat (12 at least, 21,32) napex is a cooler (11,22,31) surround, in cooler, be provided with an isolated component (14,24,34), it is cooler (11,22,31) two parts have been divided into, described cooler (11,22,31) be provided with at least one director element (16,17), this director element is contained in the cooler casing also/or with the isolated component (14 that is arranged in the cooler, 24,34) link to each other, it is characterized in that described director element is at least one guide groove (16,17) that is arranged on the cooler casing.
2. according to the device of claim 1, it is characterized in that described director element (16,17) is located at the height place that the solidification front (15,25,35) that is located at the molten metal in the geat (12,21,31) is limited.