KR101144036B1 - Molten metal stopper apparatus having improved heat isolation - Google Patents

Molten metal stopper apparatus having improved heat isolation Download PDF

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KR101144036B1
KR101144036B1 KR1020100066053A KR20100066053A KR101144036B1 KR 101144036 B1 KR101144036 B1 KR 101144036B1 KR 1020100066053 A KR1020100066053 A KR 1020100066053A KR 20100066053 A KR20100066053 A KR 20100066053A KR 101144036 B1 KR101144036 B1 KR 101144036B1
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South Korea
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molten metal
heater
stopper
cover
outer cover
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KR1020100066053A
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Korean (ko)
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KR20120005351A (en
Inventor
김원기
김종욱
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현대자동차주식회사
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Abstract

The present invention relates to a molten metal stopper device of an automatic molten metal supplying system, the molten metal stopper device having an improved heater cover configured to double insulation shielding around the stopper and the molten metal, the electric heater in the heater device for preventing solidification of the molten metal It is about. In the present invention, by adopting a double cover structure in which the inner cover is spaced inside the outer cover so that the air insulation layer is formed, the heat insulating performance of the heater device can be maximized, thereby preventing the solidification phenomenon of the molten metal can be effectively prevented. . In addition, it is possible to extend the life of the heater by reducing the full load operation of the heater, and to secure the durability of the equipment and to manage the low temperature of the molten metal by eliminating the insulation problem in the current installation space, thereby reducing energy consumption, casting cost and cost There are several advantages, such as ease of material quality control.

Description

Molten Metal Stopper Apparatus Improved Insulation Performance {MOLTEN METAL STOPPER APPARATUS HAVING IMPROVED HEAT ISOLATION}

The present invention relates to a molten metal stopper device, and more particularly, to a molten metal stopper device for selectively blocking the supply of molten metal in an automatic molten metal supplying system for supplying a molten material for casting, such as an aluminum alloy, to a mold of a low pressure casting machine. It is about.

In general, the low pressure casting method is a technique of slowly injecting molten metal melted at a lower pressure from the lower part of the mold to coagulate. The low pressure casting method is capable of producing precise castings with less mixing defects and incorporation of foreign substances such as oxides. It is widely used for the manufacture of heavy cylinder blocks, cylinder heads, wheels and the like.

The low pressure casting method is also used in copper alloys, cast iron and the like, but is mainly used for casting aluminum alloys. In particular, it is widely used for casting cylinder heads for automobile engines to aluminum alloys.

In the low pressure casting machine used for low pressure casting, the aluminum alloy molten metal is filled into the mold to cast parts. At this time, the automatic melting system for manufacturing the aluminum alloy molten metal is automatically transported and supplied and then injected into the mold of the low pressure casting machine. It is becoming.

1 and 2 are cross-sectional views showing the configuration of the automatic melt supplying system, in particular showing the operating state of the melt stopper device.

As shown, the automatic molten metal supply system 100 is an apparatus for automatically transporting the molten aluminum alloy molten metal from the melting furnace 110 to the heating furnace 150 connected to the mold 210 of the low pressure casting machine 200, Degassing apparatus 110 is installed on the melting furnace 110 for melting the raw material to produce the molten metal and the molten metal from the melting furnace 110, the molten metal supply pipe 120 is supplied and moved ( 130 and a molten metal stopper device 140 installed on the molten metal supply pipe 120 to selectively block the supply of the molten metal supplied through the molten metal supply pipe 120 through the degassing device 130; The main configuration is a heat retention furnace 150 in which the molten metal passing through the molten metal stopper device 140 is temporarily stored and maintained at a temperature.

The thermal insulation furnace 150 in which the molten metal is stored is connected to the mold 210 of the low pressure casting machine 200 through the connection pipe 151, and the mold 210 of the low pressure casting machine 200 is connected to the insulation furnace 150. It consists of a lower mold 212 connected through the tube, and the upper mold 211 provided to be combined with the lower mold 212, a molding space in which the upper mold 211 and the lower mold 212 molds the product Will form.

In addition, the low pressure casting machine 200 is provided with a variety of machines for molding and separating the upper mold 211 and the lower mold 212, demoulding the product.

In addition, the molten stopper device 140 is a device for controlling the amount of molten metal supplied to the thermal furnace 150 and preventing leakage of the pressing force during casting and pressurization. Looking at the configuration, the molten metal stopper moves up and down to be connected to the thermal furnace 150. Stopper 141 for selectively opening and closing the molten metal inlet 121 of the molten metal supply pipe 120, the stopper elevating cylinder 142 for elevating and moving the stopper 141, and the stopper 141 by rotating the stopper 141 Stopper locking cylinder 143, stopper 141 which prevents the stopper 141 from being pushed to the inner surface of the inlet 121 and removes foreign substances adhering to the inner surface of the molten metal inlet 121 and maintains airtightness. The heater device 145 is installed around the stopper 141 and prevents the solidification of the molten metal from the molten metal inlet 121.

Here, the stopper 141 is a device for controlling the inflow of the molten metal in the thermal furnace 150, and is a kind of valve for opening and closing the molten metal inlet 121 of the thermal furnace 150, and the stopper lifting cylinder 142 is the stopper 141. Is an actuator for opening and closing the stopper, and the stopper locking cylinder 143 is an actuator for preventing the stopper 141 from sliding.

In addition, the heater device 145 is an electric heater device for preventing the solidification of the molten metal, a heater device for preventing the solidification of the molten metal in the molten metal supply pipe 120 together with the heater device 145 around the stopper 141 ( 122) is installed.

The heater device 145 is composed of a heater rod-shaped electric heater 149 and a heater cover 146 of a heat insulating material installed to surround the electric heater 149, the heater cover 146 is a stopper 141 The surrounding area is sealed to insulate the heat from leaking to the outside.

As a result, when the molten metal produced in the melting furnace 110 flows into the degassing apparatus 130, the gas contained in the molten metal is removed from the degassing chamber 131, and then moved along the molten metal supply pipe 120, followed by the molten stopper device. In the open state of the 140 is supplied to the thermal furnace 150.

Subsequently, air pressurization is started into the heating furnace 150 in the closed state of the molten stopper device 140, and the molten metal is injected into the mold 210 of the low pressure casting machine 200 to perform casting.

Referring to the operation of the molten stopper device 140, the opening and closing operation of the molten stopper device 140 is performed while the driving of each cylinder is controlled by a control device not shown, the molten metal in the thermal insulation furnace 150 lowered after casting When the control signal for raising the stopper is output from the control device by the level signal, the stopper elevating cylinder 142 is driven to raise the stopper 141 to open the molten metal inlet 121, and thus the molten metal supply pipe in the melting furnace 110. The molten metal transported along the furnace 120 is moved into the thermal furnace 150 through the molten metal inlet 121.

Subsequently, when the control device outputs a control signal for stopping the stopper from the signal of the molten metal level sensor (not shown) in the heating furnace 150, the stopper elevating cylinder 142 is driven to lower the stopper 141 to inject the molten metal inlet 121. ) Closes.

As described above, when the stopper 141 closes the molten metal inlet 121, air pressurization is started into the heating furnace 150, and the molten metal is injected into the mold 210 of the low pressure casting machine 200 to perform casting.

Subsequently, the mold 210 waits until the solidification of the molten metal is completed, and the control device outputs a control signal for the stopper ascending by the molten metal lowered by the injected weight, thereby opening the molten metal inlet 121 again.

On the other hand, Figure 3 is a view for explaining the problem of the molten metal stopper device according to the prior art, it is a view showing a state in which the heater device 145 is installed in the molten stopper device 140.

As shown in the figure, a heater device 145 for preventing solidification of the molten metal is installed around the stopper 141 and the upper side of the molten metal inlet 121, so as to prevent the solidification of the molten metal around the stopper 141 and the molten metal inlet 121. In order to block the heat of the electric heater 149, the heater cover 146 for insulation is installed in the form of a cover, and the heater rod-shaped electric heater 149 is inserted into the heater cover 146.

However, the conventional molten metal stopper device 140 has a large limitation in the installation space of the heater device 145 due to the structural characteristics of the low pressure casting machine 200 and the structural characteristics of the molten metal stopper device 140. The size of the 145, in particular the heater cover 146 is not installed to a sufficient size.

For this reason, the heat insulation layer of the heater apparatus 145, ie, the heat insulation layer which consists of the heater cover 146 around the stopper 141, is not fully secured.

Therefore, the heat loss emitted to the outside through the heater cover 146, which is a heat insulating material due to the lack of heat insulation, is severe, so that the molten metal around the stopper 141 and the molten metal inlet 121 may be easily solidified. Therefore, there is a problem in that the temperature of the entire molten metal must be managed at a high temperature.

In particular, when continuous melt circulation is not performed when the line is not in operation, such as a holiday, the melt solidifies, which causes a problem in the line operation, and the electric heater 149 must be operated at full load due to the lack of adiabatic effect. The life of the is bound to be shortened.

Therefore, the present invention has been invented to solve the above problems, the heat insulation performance of the heater device for heating the stopper surroundings to prevent the molten metal around the stopper and the molten metal inlet in the automatic molten metal supply system can be maximized It is an object of the present invention to provide a molten metal stopper device that can effectively prevent the occurrence of problems caused by solidification of the molten metal around the stopper by improving the insulation performance of the heater device.

In order to achieve the above object, the present invention, the stopper for selectively opening and closing the molten metal inlet of the molten metal supply pipe connected to the heat induction furnace, the actuator for operating the stopper, and is arranged to surround the stopper surrounding the solidification of the molten metal In the molten metal stopper device including a heater device for preventing the heater, the heater cover is installed to surround the heater of the heater device to shield the heat of the heater to the inner cover and the inner cover spaced apart inside the outer cover; It is configured to provide a molten metal stopper device having improved heat insulating performance, characterized in that an air insulation layer is formed between the outer cover and the inner cover.

In a preferred embodiment, the outer cover and the inner cover may be assembled by fastening them up and down, and the nut is fastened to the end of the bolt, the inner cover is preferably made of a heat insulating material.

Accordingly, according to the molten metal stopper device according to the present invention, by installing a separate inner cover for forming an air insulation layer inside the existing heater cover (outer cover) forming the outer structure of the heater device, the outer cover and the inner Air insulation layer between the cover is configured to maximize the heat insulation performance of the heater device, thereby expanding the appearance of the heater device, that is, sufficient heat insulation of the heater device without regard to the size of the electric heater or the heater cover, or the resulting space constraints It is possible to secure the performance, thereby effectively preventing the solidification of the molten metal.

In addition, it is possible to reduce the full load operation of the heater, thereby extending the life of the heater, and to solve the problem of heat insulation in the current installation space, to secure the durability of the equipment and to manage the low temperature of the molten metal, thereby reducing energy consumption, casting cost, and cost. There are several advantages, such as savings and ease of material quality control.

1 and 2 are cross-sectional views showing the configuration of the automatic melt supplying system, in particular showing the operating state of the molten stopper device.
3 is a view for explaining the problem of the molten metal stopper device according to the prior art, it is a view showing the installation state of the heater built in the molten stopper device.
4A and 4B are sectional views showing the configuration of the molten metal stopper device according to the present invention, showing the structure of the improved heater device.
Figure 5 is a perspective view of the assembled state showing the heater apparatus of the molten stopper apparatus according to the present invention.
Figure 6 is a bottom perspective view of the assembled state showing the heater device of the molten stopper device according to the present invention.
7 and 8 are exploded perspective views of the heater device shown in Figs. 5 to 6, Figure 7 is a top perspective view of the disassembled state, Figure 8 is a bottom perspective view of the disassembled state.
9 is a cutaway perspective view of the heater device illustrated in FIGS. 5 to 6.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

4a and 4b are cross-sectional views showing the configuration of the molten metal stopper device according to the present invention, showing the structure of the improved heater device, Figure 4a is an open state of the stopper, Figure 4b is shown in a closed state of the stopper It is a cross section.

As shown, the molten metal stopper device 140 according to the present invention, the stopper 141 to move up and down selectively to open and close the molten metal inlet 121 of the molten metal supply pipe 120 connected to the insulating furnace 150 And an actuator for operating the stopper 141 and a heater device 145 installed around the stopper 141 to prevent melt solidification of the stopper and the melt inlet.

In addition, as the actuator, the stopper lifting cylinder 142 for moving the stopper 141 up and down, and the stopper 141 is prevented from being pushed and the stopper 141 is rotated so that the lower end of the stopper is pressed on the inner surface of the molten metal inlet 121. It is composed of a stopper lock cylinder 143 for maintaining the airtight while removing foreign matter attached to the inner surface of the molten metal inlet 121 by, so that the configuration of the molten stopper device 140 does not have a difference compared with the conventional.

In addition, there is no difference in the opening and closing operation of the stopper 141 made by each cylinder as compared with the prior art, but the present invention is that the heater cover of the heater cover 145 to prevent the solidification of the molten metal is maximized The main feature is to improve the insulation structure.

Looking at the structure of the heater cover, a separate inner cover for forming the air insulation layer 148 into the existing heater cover (hereinafter, divided into the outer cover) 146 forming the outer structure of the heater device 145 ( 147) install additionally.

In particular, in the heater device 145 according to the present invention, the inner cover 147 is fixed to the inside of the outer cover 146 and installed, the inner surface of the outer cover 146 and the outer surface of the inner cover 147 Are spaced apart at predetermined intervals to assemble the two covers 146 and 147 to the outside and the inside, so that the air insulation layer 148 can be formed in the spaced space between the two covers 146 and 147.

Figure 5 is a plan perspective view of the assembled state showing the heater apparatus of the molten stopper device according to the present invention, Figure 6 is a bottom perspective view of the assembled state.

7 and 8 are exploded perspective views of the heater device shown in Figs. 5 to 6, Figure 7 is a top perspective view of the disassembled state, Figure 8 is a bottom perspective view of the disassembled state.

9 is a cutaway perspective view of the heater device shown in FIGS.

First, the heater device of the molten stopper device 140 includes two sub-heater devices 145a disposed on both left and right sides, respectively, around the lifting hole 145c in the center through which the stopper 141 is inserted to move up and down. 145b, and each subheater device 145a, 145b is composed of the same components, that is, a heater cover and an electric heater 149 installed inside thereof.

The heater cover of each of the sub-heater device (145a, 145b) is made of a heat insulating material is installed to seal the space around the stopper 141 and around the molten metal inlet 121, around the electric heater 149, in particular the molten metal inlet 121 The electric heater 149 is disposed so that heat is transmitted from the upper side of the molten metal that is present in the periphery of the molten metal. In this case, each heater cover thermally shields the space where the electric heater is installed so that the heat of the electric heater is not discharged to the outside.

At this time, each heater cover is composed of an outer cover 146 and an inner cover 147 which are arranged in the outer and inner spaces to be separated from each other and assembled together, the outer cover 146 is the outer structure of the existing heater device If the heater cover to be formed, the inner cover 147 is a separate cover newly added to the inside of the outer cover 146.

Therefore, the heat insulation performance of the entire heater cover is improved by the air insulation layer 148 formed between the outer cover 146 and the inner cover 147 while the external shape of the heater device 145, that is, the overall size of the heater cover is enlarged. It is not.

The outer cover 146 and the inner cover 147 is made of the same kind or different types of heat insulating material, the electric heater by the air insulating layer 148 formed between the outer cover 146 and the inner cover 147 without expanding the size ( Shielding performance of the heat emitted from 149) can be improved compared to the conventional heater cover.

The outer cover 146 and the inner cover 147 should be assembled and fixed to each other in a spaced apart state to form an air insulation layer 148, the bolt-nut can be used as a fastening means for fastening both sides, both sides Long bolts 149a fastening through the covers 146 and 147 and nuts 149b fastened to opposite ends of the long bolts penetrating both covers may be used so that both covers are not separated from each other.

As shown, the bolt 149a is inserted into fastening holes 146a and 147a respectively formed at corresponding positions of both covers so as to penetrate both sides 146 and 147 simultaneously at the one side (eg, the upper side of the cover). The nut 149b is fastened to the end portions of the bolts 149a inserted into the fastening holes 146a and 147a so as to integrate the two covers.

In addition, the electric heater 149 positioned inwardly of the inner cover 147 may be provided in various shapes such as the embodiment of FIGS. 3 to 8 or the embodiment of FIG. 9, which is perpendicular to the inside of the inner cover 147. After extending downward and horizontally arranged at the same height (see FIGS. 3 to 8), or extending vertically downward from the inside of the inner cover 147 and horizontally arranged at the same height at each position of the upper and lower ( 9, two heaters disposed up and down in FIG. 9 may be integrally connected at opposite ends, not shown, and both ends of each heater 149 may include an outer cover 146 and an inner cover 147. Has a structure that is connected to the outside through the heater extension through hole (146b) formed in.

In this way, in the molten metal stopper device 140 according to the present invention, the heater cover is composed of a double cover structure spaced apart from each other, that is composed of an outer cover 146 and the inner cover 147 made of a heat insulating material, the outer cover spaced apart An air insulation layer 148 is formed between the 146 and the inner cover 147, thereby maximizing the heat insulating performance of the heater device 145.

As a result, sufficient heat insulation performance of the heater device can be ensured without expanding the appearance of the heater device, that is, the size of the heater cover or the electric heater, and the life of the heater can be extended, and solidification of the molten metal can be effectively prevented. .

In addition, by eliminating the problem of heat insulation in the current installation space, it is possible to secure the durability of the equipment and to manage the low temperature of the molten metal, thereby reducing the energy consumption, casting cost and cost reduction, easy material quality management.

Although the embodiment employing a single inner cover in the molten metal stopper device of the present invention has been described above, a plurality of inner covers may be installed in the outer cover to be spaced apart from each other. Since the heat insulation layer is formed, it is possible to maximize the heat insulation performance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

100: automatic melting system 110: melting furnace
120: molten metal supply line 121: molten metal inlet
130: degassing device 140: molten stopper device
141: stopper 142: stopper lifting cylinder
143: stopper lock cylinder 145: heater device
146: outer cover 147: inner cover
148: air insulation layer 149: heater
149a: Bolt 149b: Nut
200: low pressure casting machine 210: mold

Claims (3)

A stopper 141 for selectively opening and closing the molten metal inlet 121 of the molten metal supply pipe 120 connected to the heating furnace 150, an actuator for operating the stopper 141, and surrounding the stopper 141. In the molten metal stopper device 140 including a heater device 145 is disposed so as to prevent the solidification of the molten metal,
An inner cover disposed to surround the heater 149 of the heater device 145 and spaced apart from the outer cover 146 and the outer cover 146 to shield the heat of the heater 149. The molten metal stopper device having improved heat insulating performance, characterized in that the air insulating layer 148 is formed between the outer cover 146 and the inner cover 147.
The method according to claim 1,
The outer cover 146 and the inner cover 147 are assembled by fastening them with bolts 149a penetrating them up and down, and nuts 149b fastened to the ends of the bolts 149a. Improved melt stopper device.
The method according to claim 1 or 2,
The inner cover 147 is a molten metal stopper device to improve the thermal insulation performance, characterized in that made of a heat insulating material.

KR1020100066053A 2010-07-08 2010-07-08 Molten metal stopper apparatus having improved heat isolation KR101144036B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100066053A KR101144036B1 (en) 2010-07-08 2010-07-08 Molten metal stopper apparatus having improved heat isolation

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Application Number Priority Date Filing Date Title
KR1020100066053A KR101144036B1 (en) 2010-07-08 2010-07-08 Molten metal stopper apparatus having improved heat isolation

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KR20120005351A KR20120005351A (en) 2012-01-16
KR101144036B1 true KR101144036B1 (en) 2012-05-23

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102194906B1 (en) * 2020-10-29 2020-12-24 유정오 Opening/closing device of molten aluminum inlet having multi-angle shaft and single one body nozzle block

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262329A (en) * 1993-03-15 1994-09-20 Ube Ind Ltd Trough type molten metal supplying device
KR200396541Y1 (en) 2005-07-11 2005-09-22 주식회사 희택 Nozzle stopper with heat interception sleeve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262329A (en) * 1993-03-15 1994-09-20 Ube Ind Ltd Trough type molten metal supplying device
KR200396541Y1 (en) 2005-07-11 2005-09-22 주식회사 희택 Nozzle stopper with heat interception sleeve

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