KR101824500B1 - Chill Vent for Die Casting - Google Patents

Abstract

The present invention relates to a die casting die for use in a die casting die in which a region in which molten metal is directly contacted with a molten metal is formed of a metal having a thermal conductivity higher than that of the metal of the die casting die, Initiate a seventeen vent.
The seventeenth aspect of the present invention has an effect of minimizing the generation of a bond inside the die casting product by efficiently removing the gas in the melt during the die casting process because of high thermal conductivity.

Description

{Chill Vent for Die Casting}

The present invention relates to a die casting chill vent installed in a mold for die casting of an aluminum alloy or a magnesium alloy.

Generally, die casting molds are made of alloy steel, SKD61 or SKD11, and are in direct contact with the molten metal. During the die casting process, the high-temperature molten metal accelerates or slows down the cooling rate depending on the thermal conductivity of the mold, and the cooling rate affects the texture and the defect rate of the die cast product. In addition, in the die casting process, the gas existing in the molten metal must be easily discharged. However, when the thermal conductivity of the mold is low, the gas is not sufficiently discharged in the overflow. During the die casting process, the molten metal inside the die casting process proceeds and the gas that does not pass out of the die causes a defect in the pores in the die casting product, which causes a defect in the post-treatment process (for example, painting or plating).

In order to facilitate the discharge of the die for die casting during the die casting process, a vent for overflow of the die is installed. Typically, the quench is made of the same metal as the die casting mold, SKD61 or SKD11. When manufactured with SKD61 or SKD11, the quart vents do not play a sufficient role as a gas vent because the heat transfer is slow due to low thermal conductivity. In addition, when the injection pressure is increased and the casting is performed at a high pressure in the die casting process, the molten metal is scattered to the outside of the quench vent due to the high injection pressure before the molten metal coagulates, which adversely affects the working environment.

In order to solve the problems caused by low thermal conductivity and high injection pressure of the chill vent made of SKD61 or SKD11, a chill vent made entirely of beryllium copper alloy has been developed. Beryllium copper alloys have high thermal conductivity and excellent mechanical properties. However, since beryllium copper alloy is expensive, the production cost of the chill bent made of beryllium copper alloy increases. In addition, beryllium copper alloy is not a serious problem to human body in solid state, but beryllium fume generated when heated to high temperature in die casting process has a fatal effect on the human body, which can adversely affect working environment. For this reason, the chill vent made of the beryllium copper alloy is inexpensive and has a poor manufacturing environment.

An object of the present invention is to provide a die-casting chill vent which minimizes the occurrence of internal bonding in a die-casting product due to high thermal conductivity and low manufacturing cost.

The chill vent for the die casting of the present invention is a chill vent used in a die casting die, and the region where the molten metal is directly contacted is formed of a metal having higher thermal conductivity than the metal of the die casting mold. As shown in FIG.

The diecasting chill vent of the present invention has a block body and has a lower body formed with a lower body groove downward on an upper surface thereof, a lower body body inlet penetrating from one side of the upper face to the lower body groove, A lower vent inlet formed in the lower main body and having a higher thermal conductivity than the lower main body, a lower vent inlet communicating with the lower main inlet, and a lower vent outlet communicating with the lower main inlet, And a lower body portion having a block-shaped bottom face and an upper body portion formed in an upper direction on the lower face, and a lower body portion having a higher thermal conductivity than the upper body portion, And an upper vent body inserted into the upper body groove, For forming a vent passageway with it is characterized in that it comprises an upper vent.

The lower body portion and the upper body portion may be formed of alloy steel such as SKD61, SKD 11, or SCM440, and the lower vent portion and the upper vent portion may be formed by hetero-bonding with a copper alloy.

The lower vent portion extends downward from an upper surface of the lower vent body and includes a lower vent main groove formed in a region of the vent passage,

And a lower vent sub groove formed in a lower side of a bottom surface of the lower vent main groove, wherein the upper vent part protrudes downward from a lower surface of the upper vent body and is inserted into the lower vent sub groove, And an upper vent projection spaced apart from an inner circumferential surface of the vent sub groove to form the vent passage.

The lower vent sub-grooves may have a length corresponding to the width of the lower vent main groove, and a plurality of the lower vent sub grooves may be spaced apart from each other in the longitudinal direction of the lower vent main body. And may be formed in a shape opposite to the shape of the lower vent sub-groove at a position corresponding to the position of the lower vent sub-groove when the lower vent sub-groove is engaged with the lower vent body.

Also, the bottom vent sub-groove may be formed to have a curved surface in the width direction on the bottom surface thereof, a connecting portion connected to the adjacent sub vent sub-grooves may be curved in an arc shape, Shaped curved surface in the width direction, and a connecting portion connected to the adjacent upper vent projection may be formed to have a curved surface of an arc shape.

Also, the lower vent sub-grooves may have a length corresponding to the width of the lower vent main groove, a plurality of the lower vent sub grooves may be spaced apart from each other in the longitudinal direction of the lower vent main body, The projection width of the upper vent projection may be larger than the projection width of the upper vent projection at another position.

The lower main body portion may further include a lower cooling passage formed at a lower portion of the lower body groove at a position of 1 to 5 mm below the bottom surface of the lower body groove, And an upper cooling passage formed at a position of 1 to 5 mm downward.

The high-thermal conductivity of the die-casting chill vent according to the present invention effectively removes the gas in the molten metal during the die casting process, thereby minimizing the generation of the bond in the die casting product.

The seventh aspect of the present invention has the effect of reducing the manufacturing cost of the die casting process by forming a small overflow in the die casting process due to high thermal conductivity.

The die-casting chill vent according to the present invention has an excellent heat conduction characteristic compared to the chill vent made of SKD61 or SKD11 and has the same characteristics as the chill vent made of beryllium copper alloy at a low manufacturing cost.

1 is an exploded perspective view of a seventh vent for diecasting according to an embodiment of the present invention.
2 is a vertical cross-sectional view of AA of FIG.
3 is a vertical cross-sectional view of BB of FIG.
4 is a vertical cross-sectional view of the lower body and the upper body of FIG.
FIG. 5 is a vertical cross-sectional view illustrating the state where the die-casting chill vent of FIG. 1 is coupled to the die casting die.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

First, a description will be given of a die-casting chill vent according to an embodiment of the present invention.

1 is an exploded perspective view of a seventh vent for diecasting according to an embodiment of the present invention. 2 is a vertical sectional view taken along line A-A in Fig. 3 is a vertical sectional view taken along the line B-B in Fig. 4 is a vertical cross-sectional view of the lower body and the upper body of FIG.

1 to 4, the chill vent 10 for a diecasting according to an embodiment of the present invention includes a lower body 110, a lower vent 120, an upper body 130, (140).

The upper vent 140 is inserted and coupled to the lower surface of the upper main body 130 by inserting the lower vent 120 into the upper surface of the lower main body 110, The upper surface of the lower main body 110 and the lower surface of the upper main body 130 are brought into contact with each other. The lower vent 120 and the upper vent 140 form a vent passage a in which the molten metal and the gas are accommodated. The vent passage a is formed by surrounding the lower vent portion 120 and the upper vent portion 140 except for the region where the molten metal is initially introduced and the region where the molten metal is finally discharged.

The die-casting chill vent 10 is a chill vent mounted on a die casting die used for die casting of a non-ferrous alloy metal such as an aluminum alloy or a magnesium alloy. The die casting chill vent 10 has a higher thermal conductivity than a metal of the die casting die And the other area is formed of the same metal as the die casting mold. Here, the region where the molten metal is directly contacted is formed by the lower vent 120 and the upper vent 140, and the other region is formed by the lower main body 110 and the upper main body 130. The die-casting chill vent 10 easily discharges the gas generated during the die casting process through the vent passage a, rapidly cooling the molten metal introduced into the die, and discharging the molten metal to the outside of the die casting chill vent 10 prevent.

The lower main body part 110 and the upper main body part 130 are formed of alloy steel such as SKD 61 or SKD 11 or SCM 440 and the lower vent part 120 and the upper vent part 140 Phosphor bronze, and brass. The lower main body part 110 and the upper main body part 130 forming the overall structure of the die-casting chill vent 10 are formed of alloy steel having relatively high mechanical strength, and the lower main body part 110 and the upper main body part The lower vent 120 and the upper vent 140 are formed of a copper alloy having a thermal conductivity higher than that of the lower main body 110 and the upper main body 130.

The die-casting chill vent 10 is formed by alloying a copper alloy and a copper alloy. The lower main body 110 and the upper main body 130 increase the cooling rate of the molten metal while securing the mechanical strength. The die-casting chill vent 10 increases the cooling effect of the molten metal to increase the solidification speed of the molten metal flowing into the lower bend part 120 and the upper bend part 140 and to reduce the internal defects of the die casting product. The die-casting chill vent 10 reduces the scattering of the molten metal by increasing the cooling rate of the molten metal, thereby reducing the emission of contaminants into the working environment.

The lower main body 110 includes a lower main body 111, a lower main body groove 112, a lower main body inlet 113, a lower main body outlet 114 and a lower cooling passage 115.

The lower main body 111 is formed in a block shape corresponding to half of the die-casting chill vent 10. For example, the lower main body 111 may be formed in a block shape such as a hexahedron or a semi-cylindrical shape.

The lower main body 111 is formed of various alloy steels used for making molds, and may be formed of alloy steel such as SKD61, SKD11, SCM440 and the like. In addition, the lower body 111 may be formed to have a hardness of HRC 55 or more by heat treating low carbon steel (0.1 to 0.5 wt% C). The lower main body 111 serves as a support so that the chill vent has sufficient strength. In addition, the lower main body 111 prevents deformation of the lower vent portion 120 due to die casting pressure during the die casting process.

<Lower body seems to be appropriate because it encloses lower vent part.>

The lower body groove 112 is formed as a groove formed in a downward direction from the upper surface of the lower body 111. The lower body groove 112 is formed to have a side wall along each side of the lower body 111. The lower body groove 112 receives the lower bent portion 120 therein. The lower vent portion 120 received in the lower body groove 112 is coupled to be surrounded by the respective side walls. The lower body groove 112 is formed to have a predetermined depth, width, and length so as to accommodate the lower bent portion 120 therein.

The lower body inlet 113 is formed to pass from one side of the upper surface of the lower body 111 to the lower body groove 112. The lower body inlet 113 is connected to the overflow of the die casting mold to provide a path through which the molten metal and gas are discharged and introduced into the vent passage a. The lower body inlet 113 is formed in a shape corresponding to the shape of the overflow of the die casting mold and is formed to have a predetermined width and height.

The lower body outlet 114 is formed to pass from the other side of the upper surface of the lower body 111 to the lower body groove 112. The lower body outlet 114 provides a path through which the gas and the molten metal introduced into the vent passage (a) flow out. The lower body inlet 113 is formed in a shape corresponding to the shape of the overflow of the die casting mold and is formed to have a predetermined width and height.

The lower cooling passage 115 is formed at a lower portion of the lower body groove 112 and is formed as a cooling water passage through which cooling water flows. The lower cooling passage 115 includes an inlet and an outlet formed on the other side surface and a cooling water passage formed inside the lower body 111. The lower cooling passage 115 may be formed in various shapes of cooling water passages inside the lower main body 111. The lower cooling passage 115 may extend inwardly from the other side of the lower body 111 and may extend through the other side of the lower body 111 to have a generally "C" shape. In addition, the lower cooling passage 115 may be formed in a zigzag shape in the lower body 111.

The lower cooling passage 115 provides a path through which cooling water for cooling the lower body 111 and the lower vent 120 flows. Accordingly, the lower cooling passage 115 is formed at a depth of 1 to 5 mm below the bottom surface of the lower body groove 112. If the depth of the lower cooling passage 115 is too deep, the lower vent portion 120 can not be efficiently cooled. If the depth of the lower cooling passage 115 is too low, it may be difficult to process the lower cooling passage 115.

The lower vent part 120 includes a lower vent main body 121, a lower vent main groove 122, a lower vent sub groove 123, a lower vent inlet 124, and a lower vent outlet 125. The lower vent part 120 together with the upper vent part 140 forms a vent passage a through which the molten metal and the gas are introduced. The vent passage a is formed between the lower vent inlet 124 and the lower vent outlet 125.

The lower vent body 121 has a lower portion and a side portion formed in a block shape corresponding to the shape of the lower body groove 112. For example, when the lower body groove 112 is formed as a hexagonal groove, the lower bent body 121 is also formed in a hexahedron shape. When the lower body groove 112 is formed as a semicylindrical groove, the lower bent body 121 is also formed in a semicircular shape.

The lower vent body 121 is preferably formed to have a thickness of 10 to 40 mm. If the thickness of the lower vent body 121 is too thin, the cooling effect of the lower vent 120 is reduced. If the thickness of the lower vent body 121 is too thick, it is not meaningful to use the die-casting chill vent 10 as a heterogeneous bonding metal.

The lower vent body 121 is inserted into and coupled to the lower body groove 112. The lower vent body 121 is formed to have a height corresponding to the depth of the lower body groove 112. The lower vent body 121 is coupled to the lower body groove 112 such that the upper surface of the lower vent body 121 is flush with the upper surface of the lower body 111.

The lower vent body 121 is formed of a metal having higher thermal conductivity than the lower body 111. The lower vent body 121 is preferably formed of a copper alloy, and may be formed of a copper alloy such as phosphor bronze or brass. The lower vent body 121 is inserted into the lower body groove 112 and then joined by heterogeneous bonding.

The joining method of joining the lower vent body 121 to the lower body 111 by inserting the lower vent body 121 into the lower body groove 112 may be performed by various methods. The die-casting chill vent 10 needs to have a good bonding interface and a bonding strength of 10 kgf / mm 2 or more. The joining method used in the die-casting chill vent 10 may be a casting method in which a copper alloy is melted and injected into the lower body groove 112 and then heat-treated. In the joining method, the lower vent body 121 is processed into each of the lower body grooves 112, the lower vent body 121 is inserted into the lower body groove 112, and then heated while being pressurized using a graphite jig or the like A diffusion bonding method can be used. Such a joining method as described above may be applied to the lower main body 111 by forming a sufficient diffusion layer by the metal of the lower vent body 121 so as to prevent the lower vent body 121 from being detached or removed from the lower main body groove 112 Thereby giving a bonding strength.

The lower vent main groove 122 is formed in a groove shape extending downward from the upper surface of the lower vent body 121. The lower vent main groove 122 is formed in a region where the vent passage a is formed. Since the lower vent main groove 122 forms the vent passage a, the lower vent main groove 122 has a main groove length extending in the longitudinal direction of the lower vent body 121 and a width of the main groove extending in the width direction. At this time, the main width length is less than the length of the lower vent body 121 so that the lower vent inlet 124 and the lower vent outlet 125 can be formed on one side and the other side. The main groove width is formed to be smaller than the entire width of the lower vent body 121 so that the side walls are formed on the front and rear sides of the lower vent body 121. The lower vent main groove 122 has a main groove depth corresponding to a height of a required vent passage a.

The lower vent sub-grooves 123 are formed in a lower direction on the bottom surface of the lower vent main groove 122, and a plurality of the lower vent sub grooves 123 are spaced apart from each other in the longitudinal direction of the lower vent main body 121. The lower vent sub-grooves 123 are formed to be inclined with respect to the vertical direction in the downward direction, and may be inclined at preferably 30 to 45 degrees. When the lower vent sub-groove 123 is formed to be inclined, the contact area between the molten metal and the lower vent body 121 is increased to cool the molten metal more efficiently.

The lower vent sub-groove 123 is formed to have a length corresponding to the width of the lower vent main groove 122. Since the plurality of lower vent sub-grooves 123 are spaced apart from each other in the longitudinal direction of the lower vent body 121, the respective widths may be determined according to the total number of the sub-grooves. However, the width of the lower vent sub-groove 123a located at one side of the lower vent sub-groove 123 is wider than that of the lower vent sub-groove 123b located at another position. Here, one side refers to the direction in which the molten metal flows into the vent passage (a). The lower vent sub-grooves 123a located at the most one side of the lower vent sub-grooves 123 may be formed to have a width larger by 5 to 15% than the lower vent sub-grooves 123b at other positions.

The bottom vent sub-grooves 123 are formed such that the bottom surface forms a curved surface in the width direction. In addition, the lower vent sub-groove 123 is formed so that a connecting portion connected to the adjacent lower vent sub-groove 123 forms a curved surface. The bottom vent sub-groove 123 is curved to form a bottom surface and a connecting portion in the longitudinal direction of the lower vent body 121, so that the molten metal and gas flow smoothly through the vent passage a.

The lower vent inlet 124 is formed to be connected to the lower body inlet 113 and the lower vent main groove 122 at one side of the lower vent 120. One end of the lower vent inlet 124 is formed in a shape corresponding to the lower body inlet 113 so as to communicate with the lower body inlet 113. The other end of the lower vent inlet 124 has a shape corresponding to the lower vent main groove 122 and communicates with the lower vent main groove 122. The lower vent inlet 124 may have various shapes depending on the shapes of the lower body inlet 113 and the lower vent main groove 122. For example, the lower vent inlet 124 may be formed to have a greater width and a reduced height while moving toward the lower vent main groove 122.

The lower vent inlet 124 allows the molten metal and gas flowing through the lower body inlet 113 to flow into the vent passage a. Meanwhile, the lower vent inlet 124 may form a part of the vent passage a.

The lower vent outlet 125 is formed to connect the lower vent main groove 122 and the lower body outlet 114 from the other side of the lower vent 120. One end of the lower vent outlet 125 has a shape corresponding to the lower vent main groove 122 and communicates with the lower vent main groove 122. The other end of the lower vent inlet 124 is formed in a shape corresponding to the lower body outlet 114 so as to communicate with the lower body outlet 114. The lower vent outlet 125 allows the gas introduced into the vent passage a to flow out of the quench vent. Meanwhile, the lower vent outlet 125 may form a part of the vent passage a.

The upper body portion 130 includes an upper body 131, an upper body groove 132, and an upper cooling passage 135.

The upper body 131 is formed in a block shape corresponding to a half of the die-casting chill vent 10. For example, the upper body 131 may have a block shape such as a hexahedron or a semicircular cylinder. The lower surface of the upper body 131 is coupled to the upper surface of the lower body 111 so as to face the upper surface of the lower body 111.

The upper body 131 is formed of various alloy steels used for manufacturing a mold, and is preferably made of the same material as the lower body 111.

The upper body groove 132 is formed as a groove formed in the upper direction of the lower surface of the upper body 131. The lower body groove 112 is formed to have side walls along each side surface of the upper body 131. The upper body groove 132 may be formed in a shape symmetrical to the lower body groove 112. The upper body groove 132 receives the upper vent portion 140 therein. The upper vent portion 140 received in the upper body groove 132 is coupled to be surrounded by the side walls. The upper body groove 132 is formed to have a predetermined depth, width and length so as to accommodate the upper vent 140 therein.

The length of the upper body groove 132 may be the same as the length of the lower body groove 112. The width of the upper main body groove 132 may be the same as the width of the lower main groove 122 or the width of the lower main groove 112. The lower surface of the upper body 131 is entirely in contact with the upper surface of the lower body 111 on both sides in the longitudinal direction. The lower surface of the upper main body 131 is in contact with the upper surface of the lower vent body 121, or the lower surface of the lower vent body.

The upper cooling passage 135 is formed as a cooling water passage through which cooling water for cooling the upper body 131 flows. The upper cooling passage 135 includes an inlet and an outlet formed on the other side surface and a cooling water passage formed inside the upper body 131. The upper cooling passage 135 may be formed in various shapes of cooling water passages in the upper body 131. The upper cooling passage 135 may extend inwardly from the other side of the upper body 131 and may extend through the other side of the upper body 131 to have a generally "U" shape. In addition, the upper cooling passage 135 may be formed in a zigzag shape in the upper body 131.

The upper cooling passage 135 provides a path through which the cooling water for cooling the upper body 131 and the upper vent 140 flows. Accordingly, the upper cooling passage 135 is formed at a position 1 to 5 mm below the upper surface of the upper body groove 132. If the position of the upper cooling passage 135 is too large, the upper vent portion 140 can not be efficiently cooled. Further, if the position of the upper cooling passage 135 is too close, the processing of the upper cooling passage 135 may be difficult.

The upper vent portion 140 includes an upper vent body 141 and an upper vent projection 143. The upper vent portion 140 forms a vent passage a through which molten metal and gas flow together with the lower vent portion 120.

The vent passage a is formed to have a height of 0.5 to 1.5 mm and cools the molten metal so that the molten metal entering the vent passage a coagulates before reaching the lower vent outlet 125.

The upper vent body 141 is formed in a block shape having a lower portion and a side portion corresponding to the shape of the upper body groove 132. For example, when the upper body groove 132 is formed as a hexagonal groove, the upper vent body 141 is also formed in a hexahedron shape. When the upper body groove 132 is formed as a semicylindrical groove, the upper bent body 141 is also formed in a semicircular shape. The upper vent body 141 is inserted into and coupled to the upper body groove 132. The upper vent body 141 is formed to have a height corresponding to the depth of the upper body groove 132. The upper vent body 141 is coupled to the lower body groove 112 such that the lower surface of the upper vent body 141 is flush with the lower surface of the upper body 131.

The upper vent body 141 is preferably formed to have a thickness of 10 to 40 mm. If the thickness of the upper vent body 141 is too thin, the cooling effect of the upper vent 140 is reduced. If the thickness of the upper vent body 141 is too thick, the manufacturing cost is increased, and there is no use of the hetero-junction metal.

The upper vent body 141 is formed of a metal having higher thermal conductivity than the upper body 131. The upper vent body 141 may be formed of the same metal as the lower vent body 121. The upper vent body 141 is preferably formed of a copper alloy, and may be formed of a copper alloy such as phosphor bronze or brass. The upper vent body 141 is inserted into the upper body groove 132 and then joined by heterogeneous bonding. Since the heterojunction method has been described in the heterojunction method of the lower vent body 121, a detailed description thereof will be omitted.

The upper vent projections 143 protrude downward from the lower surface of the upper vent body 141. The upper vent projection 143 is inserted into the lower vent sub groove 123 and the outer peripheral surface is spaced apart from the inner peripheral surface of the lower vent sub groove 123 to form a vent passage a.

The upper vent projection 143 is formed to be inclined with respect to the vertical direction, and preferably, it may be inclined at 30 to 45 degrees. In this case, the vent passage (a) is formed to be inclined with respect to the vertical direction. Accordingly, the vent passage (a) increases the contact area between the molten metal flowing through the vent passage (a) and the upper vent body 141, thereby cooling the molten metal more efficiently.

The upper vent projection 143 is formed at a position corresponding to a position where the lower vent sub-groove 123 is formed when the upper vent body 141 is engaged with the lower vent body 121. The upper vent projection 143 is formed on the lower surface of the upper vent body 141 in a shape opposite to the shape of the lower vent sub-groove 123. When the upper vent projection 143 is inserted into the lower vent sub-groove 123, the outer peripheral surface of the upper vent projection 143 is spaced apart from the inner peripheral surface of the lower vent sub-groove 123 by a predetermined distance. The upper vent projections 143 together with the lower vent sub-grooves 123 form a vent passage a through which molten metal and gas flow.

The upper vent projections 143 are formed such that a plurality of the upper vent projections 143 are spaced apart from each other in the longitudinal direction of the upper vent body 141, as in the case of the lower vent sub- The upper vent projection 143 may have a length corresponding to the width of the upper vent body 141 or a smaller length. Since the upper vent projections 143 are spaced apart from each other in the longitudinal direction of the upper vent body, the projection width may be determined according to the total number of the projections. However, the protrusion width of the upper vent protrusion 143a located at the most one side of the upper vent protrusion 143 is formed to be wider than the protrusion width of the upper vent protrusion 143b at another position. Here, one side refers to the direction in which the molten metal flows into the vent passage (a). Since the upper vent projection 143a located on the most side of the upper vent projection 143 is in contact with the relatively higher temperature and pressure of the molten metal, it is necessary to increase the strength of the upper vent projection 143. Therefore, 15%. &Lt; / RTI &gt;

The upper vent projection 143 is formed so as to form a curved surface of a plurality of planes whose lower ends form an arc or a constant angle in the width direction. In addition, the upper vent projection 143 is formed so that the connecting portion connected to the adjacent upper vent projection 143 forms a curved surface of an arc shape. The upper vent sub-groove is formed such that the bottom surface and the connecting portion are curved in the longitudinal direction of the lower vent body 121, so that the molten metal and gas flow smoothly in the vent passage (a).

Next, the operation of the chill vent for diecasting according to one embodiment of the present invention will be described.

FIG. 5 is a vertical cross-sectional view illustrating the state where the die-casting chill vent of FIG. 1 is coupled to the die casting die.

Referring to FIG. 5, a mold for die casting to which a die-casting chill vent 10 according to an embodiment of the present invention is coupled includes a mold body 20, a sleeve 30, and a plunger 40 . However, the die casting die may have various structures depending on the shape of the die casting product to be manufactured, and may include additional structures.

The mold body portion 20 is formed with a molding cavity 21 corresponding to the shape of the die casting product and has a molten metal injection port 22 as a path through which the molten metal flows into the molding cavity 21 on one side, An overflow 23 for filling the molding cavity 21 with the remaining molten metal is formed. The mold body 20 is connected to an overflow 23 and a vent cavity 24 to which the die-casting chill vent 10 is coupled is formed.

The sleeve 30 is coupled to the melt inlet 22 and supplies the melt injected through the sleeve inlet 31 to the melt inlet 22. The sleeve 30 has a plunger inlet 32 through which the plunger 40 is inserted.

The plunger 40 is movably coupled to the plunger injection port 32 of the sleeve 30 and injects the molten metal injected through the sleeve injection port into the molten metal injection port of the metal mold body.

The die-casting chill vent 10 is inserted into the vent cavity of the mold body part and joined thereto. The die-casting chill vent 10 is connected to the overflow of the lower body inlet 113, and forms a path through which the molten metal and the gas are discharged to the outside. Since the molten metal and the vent passage (a) into which the gas flows are formed of a copper alloy having a relatively high thermal conductivity, the cooling efficiency of the molten metal is high. Accordingly, the die-casting chill vent 10 discharges the gas flowing through the overflow and quickly cools the molten metal.

Since the vent passage (a) of the die-casting chill vent (a) is formed in a U shape or a curved surface having a predetermined angle repeatedly and is inclined at a predetermined angle with respect to the vertical direction, The area of contact with the upper vent 140 is increased and the flow of the molten metal into the vent passage a is delayed by the resistance of the upper vent protrusion 143. Therefore, the molten metal flowing into the vent passage (a) can be cooled and solidified rapidly in a short time.

10: Seven vents for diecasting
110: Lower main body part
111: Lower main body 112: Lower main body groove
113: Lower body inlet 114: Lower body outlet
115: lower cooling passage
120: Lower vent portion
121: Lower vent body 122: Lower vent main groove
123: Lower vent sub-groove 124: Lower vent inlet
125: Lower vent outlet
130:
131: upper body 132: upper body groove
135: upper cooling passage
140: upper vent portion
141: upper vent body 143: upper vent projection
20: mold body portion 30:
40: plunger

Claims (8)

delete And a lower main body inlet port extending from one side of the upper surface to the lower main body groove and a lower main body outlet port extending from the other side of the upper surface to the lower main body groove, the lower main body having a block- Wealth,
A bottom vent body formed of a metal having higher thermal conductivity than the lower body and inserted into the lower body groove, a lower vent inlet communicating with the lower body inlet, and a lower vent outlet communicating with the lower body outlet, Wealth,
An upper main body portion having an upper body formed in a block shape and having an upper body groove formed in an upper direction thereof,
And an upper vent portion formed of a metal having higher thermal conductivity than the upper body and having an upper vent body inserted into the upper body groove and forming a vent passage with the lower vent,
The lower vent portion extends downward from an upper surface of the lower vent body and includes a lower vent main groove formed in a region of the vent passage and a lower vent sub groove formed in a lower direction of a bottom surface of the lower vent main groove In addition,
Wherein the lower vent sub-grooves are spaced from each other in the longitudinal direction of the lower vent sub-grooves, and the width of the lower vent sub-grooves located at the most one of the lower vent sub- Width,
Wherein the upper vent portion includes an upper vent protrusion protruding downward from a lower surface of the upper vent body to be inserted into the lower vent sub-groove and having an outer circumferential surface spaced apart from an inner circumferential surface of the lower vent sub-
Wherein the upper vent projection is formed in a shape opposite to the shape of the lower vent sub-groove at a position corresponding to a position of the lower vent sub-groove when the upper vent body is engaged with the lower vent body,
Wherein the upper vent projection is formed such that the projection width of the upper vent projection located at the most one side is wider than the projection width of the upper vent projection at another position,
Wherein the lower vent inlet is formed so as to have a greater width and a reduced height as it goes toward the lower vent main groove direction. 3. The method of claim 2,
Wherein the lower body portion and the upper body portion are formed of SKD 61, SKD 11, or SCM440, and the lower vent portion and the upper vent portion are bonded to each other by a copper alloy. delete delete 3. The method of claim 2,
Wherein the lower vent sub-groove has a bottom surface formed in a curved shape in the width direction, and a connection part connected to the adjacent lower vent sub-groove is curved in an arc shape,
Wherein the upper vent projection is formed so that a lower end portion thereof is curved in a curved shape in the width direction and a connecting portion that is connected to the upper vent projection is formed to be a curved surface of an arc shape. delete 3. The method of claim 2,
The lower main body portion further includes a lower cooling passage formed at a lower portion of the lower body groove at a position of 1 to 5 mm below the bottom surface of the lower body groove,
Wherein the upper body portion further comprises an upper cooling passage formed at a position of 1 to 5 mm below the upper surface of the upper body groove.

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