KR101555521B1 - Molding apparatus for die casting - Google Patents

Molding apparatus for die casting Download PDF

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Publication number
KR101555521B1
KR101555521B1 KR1020120148839A KR20120148839A KR101555521B1 KR 101555521 B1 KR101555521 B1 KR 101555521B1 KR 1020120148839 A KR1020120148839 A KR 1020120148839A KR 20120148839 A KR20120148839 A KR 20120148839A KR 101555521 B1 KR101555521 B1 KR 101555521B1
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KR
South Korea
Prior art keywords
molten metal
mold
sleeve
space
plunger
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KR1020120148839A
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Korean (ko)
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KR20140079177A (en
Inventor
홍기원
오종민
구대현
전연도
Original Assignee
주식회사 에스티아이씨앤디
한국전기연구원
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Application filed by 주식회사 에스티아이씨앤디, 한국전기연구원 filed Critical 주식회사 에스티아이씨앤디
Priority to KR1020120148839A priority Critical patent/KR101555521B1/en
Priority to PCT/KR2013/002073 priority patent/WO2014098320A1/en
Publication of KR20140079177A publication Critical patent/KR20140079177A/en
Application granted granted Critical
Publication of KR101555521B1 publication Critical patent/KR101555521B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The die casting mold apparatus according to the present invention is provided with a mounting portion on which an object to be molded is mounted so as to be movable in a direction in which the object to be molded is inserted into the molding space and in a direction to be taken out from the molding space, And a work for taking out the molded object from the molding space can be easily performed.

Figure R1020120148839

Description

[0001] MOLDING APPARATUS FOR DIE CASTING [0002]

The present invention relates to a die casting mold apparatus.

In general, die casting is a mold method in which a molten metal is injected into a mold to solidify it. As a result, it has advantages such as high productivity, high dimensional accuracy, beautiful casting surface and thin molded product, , And daily necessities.

Die casting can be classified into various types depending on the pressing force, the melt injection speed, and the structure.

1 to 3 are views showing a molding process by a die casting mold apparatus according to the related art.

A conventional die casting mold apparatus is provided with a mold apparatus 1 in which a molding space 2 in which a molten metal L is injected to form a molded product is formed and a molten metal injection apparatus 2 for injecting molten metal L into a molding space 2 of the mold apparatus 1 The sleeve 20 is connected to the molding space 2 of the mold apparatus 1 and is supplied with the molten metal L and the molten metal L supplied to the inside of the sleeve 20, And a plunger (30) to be injected into the molding space (2) of the device (1).

A molten metal supply port 22 is formed in the upper portion of the sleeve 20 to receive the molten metal L through the heating furnace 40 or the like. The molten metal (L) supplied to the sleeve (20) is filled from the lower side of the sleeve (20).

The plunger 30 includes a plunger tip 32 located inside the sleeve 20 and in contact with the melt L supplied to the inside of the sleeve 20 and a plunger tip 32 connected to the plunger tip 32, And a plunger rod 34 connected to a driving device (not shown) extending in the longitudinal direction to provide a linear driving force. The pressing surface 321 in which the molten metal L is in contact with the plunger tip 32 is formed as a vertical surface parallel to the vertical axis perpendicular to the moving direction of the plunger tip 32. [

The molding process of the molded product using the conventional die casting mold apparatus thus configured is as follows.

1, when the plunger 30 is retracted rearward, that is, when the plunger 30 is separated from the mold apparatus 1 by the sleeve 20 by the heating furnace 40 or the like And the molten metal (L) is supplied to the sleeve (20). 2 and 3, when the plunger 30 is moved forward, that is, when the plunger 30 is moved toward the mold apparatus 1, the sleeve (not shown) The molten metal L supplied to the inside of the molding apparatus 1 is injected into the molding space 2 of the mold apparatus 1 while being pressed by the plunger 30. Then, the molten metal L injected into the molding space 2 of the mold apparatus 1 is solidified to mold the molded article.

However, the conventional die casting mold apparatus has the following problems.

First, when the molten metal L is supplied to the inside of the sleeve 20, the surface-side molten metal L exposed to the air in the sleeve 20 is exposed to the air for a relatively long time, There is a problem that when the oxide film and the solidification layer are not filtered and injected into the molding space 2, the molded product may be defective.

In this process, the plunger tip 32 and the inner peripheral surface of the sleeve 20 are repeatedly moved in the process of molding the plurality of molded products. Friction occurs. This friction causes a problem that the outer circumferential surface of the plunger tip 32 and / or the inner circumferential surface of the sleeve 20 are damaged, and thus the life of the plunger 30 and / or the sleeve 20 is deteriorated .

2, since the pressing surface 321 of the plunger tip 32 is formed in a vertical plane, the plunger tip 32 is moved forwardly, so that the molten metal L is discharged from the sleeve 20 It gets in the inside. The air A is entrapped in the molten metal L by the swaying of the molten metal L so that bubbles are generated in the molten metal L and these bubbles flow into the molding space 2 as they are . Therefore, as shown in FIG. 3, there is a problem that defects (A) are generated in the molded product due to the introduction of air and the generation of bubbles in the molten metal (L).

In addition, when the molded article has a large size and a large weight, it is difficult for the operator to directly carry out the work of taking the molded article out of the molding space 2 after the molding of the molded article is completed. There is a danger that there is a great risk to the operator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide an injection molding machine which can easily carry out an operation of inserting an object to be molded into a molding space, There is provided a die casting mold apparatus.

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According to another aspect of the present invention, there is provided a die casting mold apparatus including a first mold, a second mold coupled to the first mold in a detachable manner to form a molding space into which the object is inserted together with the first mold, And a mounting unit mounted on the second mold so as to be movable in a direction in which the molding object is inserted into the molding space and in a direction to be taken out of the molding space, and on which the molding object is mounted.

The object to be molded may be mounted on the mounting portion while being coupled to the jig.

Here, it is preferable that a carrying hook is provided at an upper portion of the jig.

The molding object may be formed in a cylindrical shape having a plurality of molten metal injection holes formed in the circumferential direction and penetrating in the vertical direction and a hollow portion penetrating in the vertical direction.

The forming object may be formed by stacking a plurality of original plates in a vertical direction.

In this case, a first portion formed to be larger than a diameter of the shaft portion at the upper side of the shaft portion and a shaft portion inserted into the hollow portion of the object to be molded, and a second portion formed larger than the diameter of the shaft portion at a lower side of the shaft portion. And at least one of the first portion and the second portion may be detachably coupled to the shaft portion.

The mounting portion may include a mounting member on which a mounting groove is formed through which at least a part of the second portion is inserted and fixed.

A first step portion is provided between the first portion and the shaft portion, the first step portion having a diameter larger than an inner diameter of the hollow portion of the molding object and smaller than a diameter of a virtual circle passing through the plurality of molten metal injection holes of the molding object, A second step portion having a diameter smaller than the diameter of the virtual circle which is larger than the inner diameter of the hollow portion of the object to be molded and which has the molten metal injection holes of the object to be molded is provided between the second portion and the shaft portion, The object to be molded may be disposed between the first step portion and the second step portion so that the side surface is in close contact with the first step portion and the lower surface of the object is in contact with the second step portion.

Meanwhile, the first mold may be provided with an injection path through which the molten metal is injected, and the injection path may communicate with a space formed by the lower surface of the object and the second step.

The die casting mold apparatus according to the present invention is characterized in that the die casting mold apparatus is provided in the second mold so as to be movable in a direction in which the object is inserted into the molding space and in a direction taken out from the molding space, And a pressing member which is moved together with the mounting portion when the object is taken out and presses the molding object or the jig in a direction in which the molding object is taken out from the molding space.

Further, the die casting mold apparatus according to the present invention may include a mount moving unit connected to the mount unit to move the mount.

The die casting mold apparatus according to the present invention is provided with a mounting portion on which an object to be molded is mounted so as to be movable in a direction in which the object to be molded is inserted into the molding space and in a direction to be taken out from the molding space, There is an effect that it is possible to easily carry out the work of forming the molded object and the operation of taking out the molded object completed from the molding space.

The die casting mold apparatus according to the present invention can reduce the friction between the sleeve and the plunger tip that occurs during the injection of the molten metal by providing the lubricant supply portion for supplying the lubricant to the plunger tip of the plunger, It is possible to reduce the damage of the plunger tip and / or the sleeve due to the friction between the tips, thereby increasing the life of the plunger and / or the sleeve.

Particularly, in the die casting mold apparatus according to the present invention, the accommodation space in which the lubricant is accommodated is arranged so as to surround the entire outer circumferential surface of the plunger tip in the circumferential direction, so that the lubricant can be uniformly applied to the entire circumferential surface of the plunger tip.

In the die casting mold apparatus according to the present invention, since the pressing surface of the plunger tip in contact with the molten metal is formed to be inclined, when the pressing surface of the plunger tip presses the molten metal, it is possible to minimize swinging of the molten metal, It is possible to prevent the occurrence of defects in the molded product due to the introduction of air and the generation of air bubbles in the molten metal.

Further, the die casting mold apparatus according to the present invention is characterized in that a runner forming portion having a communication hole smaller than the discharge port of the sleeve is provided between the injection path for injecting the molten metal and the discharge port of the sleeve, So that the inflow of air, an oxidation film, a coagulating material and the like is prevented and the quality of the molded product can be improved.

1 is a cross-sectional view illustrating a state in which molten metal is supplied to the inside of a sleeve in a die casting mold apparatus according to a related art.
Figs. 2 and 3 are cross-sectional views showing a state in which a molten metal is injected into a molding space in the die casting mold apparatus of Fig. 1. Fig.
4 is a cross-sectional view illustrating a state in which molten metal is supplied to the inside of the sleeve in the die casting mold apparatus according to the present invention.
5 is an enlarged view of part E of Fig.
Fig. 6 is a perspective view showing an object to be molded molded by the die casting mold apparatus of Fig. 4; Fig.
Fig. 7 is a sectional view showing an object to be molded molded by the die casting mold apparatus of Fig. 4; Fig.
8 is a perspective view showing a molded product formed by the die casting mold apparatus of FIG.
Fig. 9 is a sectional view showing a molded product formed by the die casting mold apparatus of Fig. 4; Fig.
10 is a perspective view illustrating a jig used in the die casting mold apparatus of FIG.
Fig. 11 is a perspective view of the die casting mold apparatus of Fig. 4, in which a second die, a molding object coupled to the jig, and a mount portion on which the jig is mounted.
12 is a rear view of the first mold of the die casting mold apparatus of FIG.
Fig. 13 is a partial plan view of the runner forming portion of the die casting mold apparatus of Fig. 12 as viewed from above. Fig.
14 is a cross-sectional view taken along line CC of Fig.
Fig. 15 is a sectional view showing a state in which a first mold and a second mold are separated from each other and a jig to which an object to be molded is mounted is mounted on a mounting portion in the die casting mold apparatus of Fig. 4;
Fig. 16 is a sectional view showing a state in which a molten metal is injected into a molding space in the die casting mold apparatus of Fig. 4; Fig.
17 is an enlarged view of F in Fig.
Fig. 18 is a cross-sectional view showing a state in which a molten metal is injected into a molding space in the die casting mold apparatus of Fig. 4;
Fig. 19 is a cross-sectional view showing a state in which a first mold and a second mold are separated from each other and a jig to which a molded object to be molded is attached is taken out from the mounting portion in the die casting mold apparatus of Fig.

Hereinafter, a preferred embodiment of a die casting mold apparatus according to the present invention will be described with reference to the accompanying drawings.

4, a die casting mold apparatus 101 according to an embodiment of the present invention includes a first mold 110, a first mold 110 coupled to the first mold 110 in a detachable manner, A sleeve 120 connected to the first mold 110 and supplied with the molten metal L therein; a second mold 112 which forms a molding space 102 into which the molding object 50 is inserted, The molten metal L supplied to the inside of the sleeve 120 is moved to the molding space between the first mold 110 and the second mold 112, A plunger 130 for injecting the molding object 50 into the molding space 102 and a direction to be taken out from the molding space 102 in the second mold 112 And a mounting portion 80 on which the molding object 50 is mounted.

Hereinafter, for describing the embodiment, the direction in which the plunger 130 moves while pressurizing the molten metal L inside the sleeve 120 so that the molten metal L is injected into the molding space 102 is defined as forward , And the direction in which the plunger 130 retracts from the molding space 102 is defined as the rear direction. However, the present invention is not limited to this direction.

The first mold 110 and the second mold 112 may be moved such that the first mold 110 moves relative to the second mold 112 or the second mold 112 moves relative to the first mold 110, And can be detachably coupled to each other by being moved relatively horizontally with respect to the main body. The sleeve 120 is connected to the first mold 110 so that the first mold 110 is fixed and the second mold 112 can be installed so as to be relatively movable with respect to the first mold 110 .

The molding space 102 between the first mold 110 and the second mold 112 is configured to mold the object 50 to be manufactured and may have various shapes depending on the shape of the object. The outlet 121 of the sleeve 120 and the molding space 102 are communicated with each other inside the first mold 110 so that the molten metal L can be injected from the sleeve 120 into the molding space 102. [ The injection flow path 103 can be formed.

The expansion portion 104 may be formed below the molding space 102 so that the molten metal L can be sufficiently injected into the molding space 102.

The sleeve 120 is configured to inject the molten metal L into the molding space 102, and various configurations are possible depending on the type of the molten metal L and the injection method. The molten metal L may be horizontally connected to the first mold 110 so that the molten metal L can be injected horizontally into the molding space 102. Here, the horizontal means the direction (the Y-axis direction in Fig. 4) substantially perpendicular to the vertical direction (the Z-axis direction in Fig. 4), and the vertical direction (In the Y-axis direction).

The sleeve 120 is disposed so as to communicate with the molding space 102 and serves as a passage through which the molten metal L is injected into the molding space 102. The molten metal L can be injected smoothly Structure. The cross section in the longitudinal direction and the cross section in the width direction of the sleeve 120 may be formed in various shapes such as a circular shape and a square shape.

A molten metal supply port 122 is formed in the upper portion of the sleeve 120 to receive the molten metal L through the heating furnace 140 or the like. A discharge port 121 through which the molten metal L is discharged is formed in front of the sleeve 120.

The plunger 130 is disposed inside the sleeve 120 and moves along the longitudinal direction of the sleeve 120 so that the molten metal L supplied to the inside of the sleeve 120 flows toward the molding space 102 So that the molten metal L is injected into the molding space 102. The plunger 130 may be configured in various ways, such as a piston having an outer diameter corresponding to the inner diameter of the sleeve 120.

For example, the plunger 130 may include a plunger tip 132 in contact with the melt L supplied to the interior of the sleeve 120 inside the sleeve 120, And a plunger rod 134 connected to the sleeve 132 and extending in the longitudinal direction of the sleeve 120 and connected to a driving device 136 for providing a linear driving force to move the plunger tip 132. For example, as the driving device 136, a linear moving mechanism such as an actuator, a linear motor, or a ball screw device operated by hydraulic pressure or air pressure may be used.

The plunger tip 132 is formed with a pressing surface 133 which is in contact with the molten metal L. [ The pressing surface 133 is a portion that presses the molten metal L toward the molding space 102 when the molten metal L is injected into the molding space 102. It is preferable that the pressing surface 133 is formed to be inclined with respect to the Y axis which is the axis which is the center of the moving direction of the plunger tip 132. [ That is, the pressing surface 133 of the plunger tip 132 is preferably formed as an inclined surface inclined at a predetermined angle (R) with respect to the vertical axis (Z-axis).

As described above, when the pressing surface 133 of the plunger tip 132 is inclined at a predetermined angle with respect to the Y axis which is the moving center axis of the plunger tip 132, when the pressing surface 133 is formed as a vertical surface The area of contact with the molten metal L can be increased. Since the amount of the molten metal to be pressed by the pressing surface 133 can be increased by increasing the area in which the pressing surface 133 is in contact with the molten metal L as described above, It is possible to reduce the sluggishness of the molten metal.

When the molten metal L is supplied to the inside of the sleeve 120 while the plunger 130 is retracted rearwardly, the molten metal L is supplied to the lower side of the inside of the sleeve 120 at a predetermined height do. Therefore, before the plunger tip 132 is moved and the pressing surface 133 presses the molten metal L, the molten metal L is brought into contact with only the lower side of the pressing surface 133 and the molten metal L is not brought into contact with the upper side State is maintained. When the pressure surface 133 presses the molten metal L as the plunger tip 132 moves, as the volume between the discharge port 121 of the sleeve 120 and the plunger tip 132 is reduced, The area of the portion where the molten metal L is in contact with the pressing surface 133 gradually increases from the lower side to the upper side. At this time, the molten metal (L) rises along the pressing surface (133) and bends forward to trap air in the molten metal (L) (see FIG. 2).

Therefore, in order to prevent such a phenomenon, the pressing surface 133 of the plunger tip 132 is preferably formed to be inclined downward. At this time, the angle formed by the normal line at the center of the pressing surface 133 of the plunger tip 132 and the Y axis (i.e., the angle R of the pressing surface 133 with respect to the vertical axis (Z axis) 30 DEG or less.

It is preferable that the plunger tip 132 is detachably connected to the plunger rod 134. In this case, the plurality of plunger tips 134 having different inclination angles of the pressure surface 133, depending on the properties of the molten metal L, There is an advantage in that it can be used while replacing the battery 132.

17, since the pressing surface 133 of the plunger tip 132, which is in contact with the molten metal L, is inclined so as to face downward, the pressing surface 133 of the plunger tip 132 It is possible to minimize the occurrence of turbulence (occurrence of turbulent flow) of the molten metal L when the molten metal L is pressurized so that the molten metal L bends forward while rising along the pressing surface 133 to trap air in the molten metal L The phenomenon can be prevented. Therefore, it is possible to prevent the occurrence of defects in the molded product due to the introduction of air into the molten metal L and the generation of bubbles.

On the other hand, the object 50 to be molded can be mounted directly on the mounting portion 80. Further, the object 50 to be molded can be mounted on the mounting portion 80 while being coupled to the jig 90. When the molding object 50 is mounted on the mounting portion 80 while being coupled to the jig 90, after the injection of the molten metal into the molding object 50 and the solidification of the molding object 50 are completed, And the operation of conveying the object 50 to the subsequent process can be easily performed.

As shown in FIGS. 6 and 7, the molding object 50 has a plurality of molten metal injection holes 52A penetrating in the vertical direction at predetermined intervals along the circumferential direction, and is vertically penetrated And may be formed in a cylindrical shape in which the hollow portion 52B is formed. The molten metal injection hole 52A can be formed in a variety of shapes such as a groove-like shape on the circumferential side surface. The molding object 50 may have an iron material to which a magnetic force can act and the molten metal L injected into the molten metal injection hole 52A may be copper (copper) dissolved. The molding object 50 can be manufactured by vertically stacking a plurality of discs 52 in which a plurality of molten metal injection holes 52A are formed in the circumferential direction. The molten metal L is injected into the plurality of molten metal injection holes 52A of the object 50 while the hollow portion 52B of the object 50 is blocked from the outside. The finished product manufactured using the molding object 50 can be used as a rotor of a motor and the rotation shaft of the motor can be inserted into the hollow portion 52B in which the melt L is not filled.

8 and 9, after the molding process is performed on the object 50 using the die casting mold apparatus 101 according to the present embodiment, a polishing process and a cutting process are performed (Rotor) may have a shape in which an upper ring 60 and a lower ring 70 made of molten metal L are formed on the upper and lower ends of the object 50. [

As shown in FIG. 10, it is preferable that a carrying hook 94 is provided at the upper portion of the jig 90. A conveying member 95 such as a chain or a rope of a hoist apparatus (not shown) may be connected to the carrying hook 94 when the molded product 50 is conveyed to the next step following the completed product. As described above, since the jig 90 is provided with the carrying hook 94, it is possible to easily carry out the operation of transporting the molded product to the molding object 50. [

The transporting hook portion 94 may be provided by being separately coupled to the jig 90. The transporting hook portion 94 may be provided on the inner surface of the first mold 110 and the second mold 112 forming the molding space 102, And the molten metal L is injected and solidified in the corresponding grooves so that the carrying hook 94 can be formed.

Meanwhile, a space may be formed between the first mold 110 and the second mold 112 to accommodate the carrying hook 94.

The jig 90 is inserted into the molding space 102 together with the molding object 50 with the molding object 50 coupled thereto and includes a shaft portion 93 inserted into the hollow portion 52B of the molding object 50, A first portion 91 formed to be larger than the diameter of the shaft portion 93 on the upper side of the shaft portion 93 and a second portion 92 formed larger than the diameter of the shaft portion 93 on the lower side of the shaft portion 93, . ≪ / RTI >

Here, at least one of the first portion 91 and the second portion 92 may be detachably coupled to the shaft portion 93. For example, the second portion 92 and the shaft portion 93 may be integrally manufactured, and the first portion 91 may be manufactured independently. After the through holes 96 penetrating through the first shaft 91, the second shaft 92 and the shaft 93 are formed, the first shaft 91, the second shaft 92, The first part 91 can be attached to and detached from the second part 92 and the shaft part 93 by inserting the screw 97 into the through hole of the screw 93 and tightening one end of the screw 97 with a nut Lt; / RTI > The shaft portion 93 is inserted into the hollow portion 52B of the molding object 50 and the first portion 91 is screwed into the shaft portion 93 by using the screw 97 and the nut 98 The molding object 50 can be engaged with the jig 90. [ However, the present invention is not limited to this configuration, and various configurations can be used in which at least one of the first portion 91 and the second portion 92 can be detachably attached to the shaft portion 93 .

On the other hand, a product (rotor) that has been molded with respect to the molding object 50 can have a shape in which an upper ring 60 and a lower ring 70 made of a molten metal L are formed at the upper and lower ends of the molding object 50 A plurality of molten metal injection holes 52A are formed between the first portion 91 and the shaft portion 93 so as to be larger than the inner diameter of the hollow portion 52B of the molding object 50, And the second stage 92 and the shaft portion 50 are provided with a first stage jaw portion 911 having a diameter smaller than the diameter of the molding object 50. The first stage jaw portion 911 is larger than the inner diameter of the hollow portion 52B of the molding object 50, A second step portion 921 having a smaller diameter than the diameter of the imaginary circle passing through the molten metal injection holes 52A of the molten metal injection hole 50 may be provided. The object 50 is held in the first stage 911 so that the upper surface of the object 50 is in close contact with the first stage 911 and the lower surface of the object 50 is in close contact with the second stage 921. [ And may be disposed between the jaw portion 911 and the second step portion 921.

Here, the injection path 103 formed in the first mold 110 communicates with the space 922 formed by the lower surface of the object 50 and the second step portion 921. The lower ring 70 can be formed while the molten metal L injected through the injection path 103 is injected into the space 922 formed by the lower surface of the molding object 50 and the second step portion 921 And the molten metal L is injected into the space 912 formed by the upper surface of the object 50 and the first step portion 921 through the injection path 103 and the plurality of molten metal injection holes 52A, The ring 60 can be formed.

As described above, the molding object 50 can be easily molded by the simple operation of detachably coupling the molding object 50 to the jig 90 on which the first stage jaw 911 and the second stage jaw 921 are formed. The upper ring 60 and the lower ring 70 can be formed at the upper and lower ends of the completed product (rotor). The shape of the upper ring 60 and the lower ring 70 can be changed by joining the object 50 to the jig 90 having different shapes of the first stage jaw 911 and the second stage jaw 921. [ It is possible to cope with the change. This is because the inner surface of the first mold 110 or the second mold 112 forming the molding space 102 for forming the upper ring 60 and the lower ring 70 is simpler And it is possible to cope with the shape change of the upper ring 60 and the lower ring 70 properly.

4 and 11, the mounting portion 80 includes a mounting member 81 on which a mounting groove 811 in which at least a part of the second portion 92 of the jig 90 is inserted and fixed is formed . The mounting member 81 is disposed in the second mold 112 so that the molding object 50 is inserted into the molding space 102 and taken out from the molding space 102, As shown in FIG. The mounting groove 811 may be formed in a shape having an inner diameter corresponding to the outer diameter of the second portion 92 of the jig 90.

The mounting member 81 can be automatically moved by being connected to the mount moving apparatus 83 via the connecting rod 82. [ The second metal mold 112 may have a through hole 113 penetrating therethrough in a horizontal direction so that the mounting member 81 and the connecting rod 82 can be installed to be movable. As the mount moving device 83, various linear moving devices such as an actuator, a linear motor, or a ball screw device operating with hydraulic or pneumatic pressure may be used.

As the mounting member 81 is moved in the direction in which the molding object 50 is taken out from the molding space 102, the mounting groove 811 is exposed and the jig The molding member 90 can be seated in the mounting groove 811 and the mounting member 81 is inserted into the molding space 102 with the jig 90 seated in the mounting groove 811 The molding object 50 can be moved to the molding space 102. [0053] Fig. When the molding object 50 is formed in the molding space 102 as the mounting member 81 is moved in the direction in which the molding object 50 is taken out of the molding space 102 at the completion of molding for the molding object 50, As shown in Fig. Since the mounting portion 80 is provided so as to be movable in the second mold 112 as described above, the insertion of the molding object 50 into the molding space 102 and the taking out of the molding space 102 are facilitated .

The second mold 112 is provided with a pressing member 300 that is provided so as to be movable in a direction in which the object 50 is inserted into the molding space 102 and in a direction taken out from the molding space 102 . The pressing member 300 may be formed in a substantially rod-like shape and arranged to be horizontally movable in the interior of the second metal mold 112. A plurality of the pressing members 300 may be disposed inside the second mold 112. A guide hole 301 into which the pressing member 300 is inserted may be formed inside the second metal mold 112 so that the pressing member 300 can be arranged to be movable inside the second metal mold 112 have.

The pressing member 300 may be connected to the mounting portion 80 and moved together with the mounting portion 80. The pressing member 300 may be connected to the mounting portion 80 through a connecting member 302 extending in the vertical direction.

The pressing member 300 is moved along with the mounting portion 80 when the molding object 50 is taken out so that the molding object 50 is taken out of the molding space 102 from the side surface of the molding object 50 As shown in FIG. 4 shows the configuration in which the pressing member 300 is disposed so as to press the side surface of the object 50 in the form of a cylinder, but the present invention is not limited thereto, The molding object 50 can be taken out of the molding space 102 while the jig 90 is being pressed.

The pressing member 300 functions to press the molding object 50 or the jig 90 so that the molding object 50 can be easily taken out from the molding space 102. The pressing member 300 also serves to guide the movement of the mounting portion 80 while moving along the guide hole 301 formed in the inside of the second mold 112.

On the other hand, when the molten metal L is supplied to the inside of the sleeve 120, the surface-side molten metal L exposed to the air in the sleeve 120 is exposed to the air for a relatively long time, There is a problem that if the oxide film and the solidification layer are injected into the molding space 102 without being filtered, the molded article may be defective. The first mold 110 is provided with a discharge port 121 of the sleeve 120 and a discharge port of the sleeve 120 between the discharge port 121 of the sleeve 120 and the injection port 103. In order to prevent defects of the molded product due to the injection of the oxide film and the solidification layer, A runner forming unit 200 having a communication hole 230 smaller than the communication hole 121 may be additionally provided.

For example, as shown in FIGS. 12 and 13, the runner forming unit 200 can be installed so as to be movable in a direction perpendicular to the moving direction of the second mold 112. The runner forming unit 200 may include a pair of slide members 210 and 220 provided so as to be movable relative to the first mold 110.

When the moving direction of the second mold 112 is the forward and backward direction (the Y-axis direction in FIG. 4), the pair of slide members 210 and 220 move in the left and right directions When the pair of slide members 210 and 220 are coupled to each other, the communication hole 230 is communicated with the discharge port 121 of the sleeve 120 and the infusion passage 103 As shown in Fig.

The slide members 210 and 220 may be linearly moved in opposite directions to form a communication hole 230, and may be linearly driven by a hydraulic cylinder, an angular pin, or the like.

The communication holes 230 may be formed in a variety of ways by the pair of slide members 210 and 220 and the communication hole 230 and the step 240 may be formed in the vertical direction .

13, the stepped portion 240 is formed so that a pair of slide members 210 and 220 are coupled to each other along the direction in which the molten metal L is injected, that is, along the longitudinal direction of the communication hole 230 And it is possible to prevent the molten metal from being injected through the surfaces where the pair of slide members 210 and 220 are coupled to each other. Meanwhile, the step 240 may be formed by connecting the communication holes 230.

Here, as a structure for preventing the molten metal from being injected through the surfaces to which the pair of slide members 210 and 220 are coupled to each other, instead of the step 240, the engagement surface may be formed in a direction in which the molten metal L is injected, The longitudinal direction of the communication hole 230 may be inclined.

It is preferable that the communication hole 230 of the runner forming part 200 is formed to be positioned in the discharge port 121 when projected onto the discharge port 121 of the sleeve 120.

The runner forming unit 200 may further include an air outlet 250 communicating with the outside on a surface of the sleeve 120 facing the outlet 121.

The air outlet 250 may be formed in various forms as a structure for discharging the air generated in the process of injecting the molten metal L.

When the communication hole 230 is projected on the discharge port 121 of the sleeve 120 and is positioned in the discharge port 121, the discharge hole 121 of the sleeve 120 is formed to be smaller than the discharge port 121 of the sleeve 120, Air or the like formed in the communication hole 230 can be prevented from flowing into the communication hole 230.

Particularly, the lowermost end of the communication hole 230 may be formed at the same height as the lowermost end of the discharge port 121 of the sleeve 120. More preferably, the lowermost end of the communication hole 230 may be formed at the lower end of the discharge hole 121 of the sleeve 120, Can be formed at a position higher than the height of the lowermost end of the first substrate 121. When the lowermost end of the communication hole 230 is formed at a position higher than the lowermost end of the discharge port 121 of the sleeve 120, oxides or the like, which may be formed on the bottom of the sleeve 120, Can be prevented.

In addition, the pair of slide members 210 and 220 may move in one direction, that is, leftward or rightward while being coupled to each other, to move the communication hole 230. The molten metal L solidified in the injection hole 103 and the communication hole 230 can be separated by the movement of the communication hole 230.

As described above, the die casting mold apparatus 101 according to the present invention is configured such that the discharge port 121 of the sleeve 120 is connected to the discharge port 121 of the sleeve 120 by the communication passage 103 through which the molten metal L is injected, Since the molten metal L can be injected into the molding space 102 through the communication hole 230 which is smaller than the discharge port 121 of the sleeve 120 by providing the runner forming part 200 having the hole 230, , An oxidation film, a solidification product and the like can be prevented and the quality of the molded article can be improved.

5 and 14, the die casting mold apparatus 101 according to the present invention includes a lubricant supply unit (not shown) installed to be connected to the sleeve 120 and supplying lubricant to the outer circumferential surface of the plunger tip 132 150).

The lubricant supply portion 150 includes a receiving portion 161 in which the plunger tip 132 is accommodated, through holes 162 and 164 communicating with the sleeve 120 and through which the plunger tip 132 passes, And a housing 160 having an injection port 163 through which lubricating oil is injected. The lubricant supply unit 150 may include a lubricant supply unit 170 that is connected to the injection port 163 of the housing 160 and supplies the lubricant to the inside of the accommodating unit 161 through the injection port 163.

The length in the front-rear direction (Y-axis direction) of the housing 160 is such that when the plunger tip 132 is received in the receiving portion 161, the plunger tip 132 is inserted between the pair of through holes 162, When the lubricating oil is supplied to the outer circumferential surface of the plunger tip 132 accommodated in the accommodating portion 161, the lubricating oil is supplied to the pair of through holes 162 and 164 Can be prevented.

As the lubricating oil supply device 170, a pump for supplying lubricating oil at a constant pressure may be used.

The receiving portion 161 of the housing 160 preferably has a larger inner diameter than the outer diameter of the plunger 132 so that the receiving space 165 in which lubricating oil is received between the outer peripheral surface of the plunger tip 132 and the outer peripheral surface of the plunger tip 132 is provided . Accordingly, the lubricating oil injected through the injection port 163 can be once applied to the outer circumferential surface of the plunger tip 132 after being accommodated in the accommodating space 165.

It is preferable that the accommodating portion 161 is formed such that the accommodating space 165 surrounds the entire circumferential surface of the plunger tip 132 in the circumferential direction of the plunger tip 132. In this case, the entire outer circumferential surface of the plunger tip 132 can be brought into contact with the lubricant along the circumferential direction, so that the lubricant can be uniformly applied to the entire outer circumferential surface of the plunger tip 132. [

The through holes 162 and 164 of the housing 160 may be formed with an inner diameter that matches the inner diameter of the sleeve 120 so that the plunger tip 132 may pass through the sleeve 120 immediately after passing through the through- As shown in FIG. The inner circumferential surface of the through holes 162 and 164 and the outer circumferential surface of the plunger tip 132 can be in close contact with each other when the plunger tip 132 is positioned inside the housing 160, Can be maintained.

The housing 160 may be disposed at a portion opposite to a portion where the sleeve 120 is connected to the first mold 110. However, the present invention is not limited thereto, and the housing 160 may be disposed in the middle of the sleeve 120. Since the housing 160 has a simple structure, it can be easily attached to and detached from the conventional die casting mold apparatus 101.

One inlet 163 may be formed in the housing 160 and a plurality of injection ports 163 may be formed at predetermined intervals along the circumferential direction of the housing 160.

The lubricant supply unit 150 is provided to supply the lubricant to the outer circumferential surface of the plunger tip 132 when the plunger tip 132 is received in the receiving portion 161 of the housing 160 And a controller 180 for controlling operation. The plunger tip 132 is retracted rearward of the sleeve 120 to be accommodated in the receiving portion 161 of the housing 160 after the operation of injecting the molten metal L into the molding space 102 is completed The lubricant can be supplied to the plunger tip 132 while the lubricant feeder 170 is operated under the control of the controller 180. [ When or before the plunger tip 132 moves from the inside of the housing portion 161 of the housing 160 to the front side of the sleeve 120 in order to inject the molten metal L into the molding space 102 , The supply of the lubricating oil to the plunger tip 132 can be interrupted while the lubricating oil supply device 170 is operated under the control of the controller 180. [

Such a controller 180 determines the current position of the plunger tip 132 from the operating state of the driving device 136 (e.g., the hydraulic or pneumatic pressure supply state, etc., when the driving device 136 is an actuator) It is possible to determine whether the plunger tip 132 is accommodated in the receiving portion 161 of the housing 160 and to control the operation of the lubricant feeder 170 using the determined information.

The friction between the sleeve 120 and the plunger tip 132 generated during the injection of the molten metal L can be reduced by providing the lubricant supply portion 150 for supplying the lubricant to the outer circumferential surface of the plunger tip 132. [ It is possible to reduce damage to the plunger tip 132 and / or the sleeve 120 due to friction between the sleeve 120 and the plunger tip 132, thereby preventing the plunger 130 and / 120 can be increased.

The molding process by the die casting mold apparatus 101 according to the present invention having the above-described structure can be performed as follows.

The hollow portion 52B of the molding object 50 is inserted into the shaft portion 93 of the jig 90 and the first portion 91 of the jig 90 and the second portion 91 of the jig 90 are inserted into both ends of the molding object 50, The object 50 is engaged with the jig 90 in a state in which the object 92 is in close contact. After the transferring member 95 is connected to the carrying hook 94 of the jig 90, the jig 90 to which the object 50 is coupled is carried.

15, in a state where the first mold 110 and the second mold 112 are separated from each other, the mounting member 81 of the mounting portion 80 is positioned in the molding space The jig 90 to which the molding object 50 is coupled is seated in the mounting groove 811 when the mounting groove 811 is exposed.

As the mounting member 81 is moved in the direction in which the object 50 is inserted into the molding space 102 in a state where the jig 90 is seated in the mounting groove 811, Can be moved to the space 102.

4, as the first mold 110 or the second mold 112 relatively moves with respect to each other, the first mold 110 and the second mold 112 are coupled to each other . At this time, the sleeve 120 is horizontally connected to the molding space 102 and the plunger 130 is retracted rearward.

In this state, the melt (L) is supplied to the sleeve (120) through the melt supply port (122) of the sleeve (120).

In order to prevent the molten metal L from flowing into the communication hole 230 when the molten metal L is supplied to the sleeve 120, the portion where the communication hole 230 is formed is formed on the left side The communication hole 230 can be prevented from being communicated with the discharge port 121 of the sleeve 120. [0064]

When the molten metal L is supplied, the plunger 130 is moved forward along the sleeve 120, that is, toward the molding space 102, as shown in FIGS. Then, the molten metal L supplied to the sleeve 120 by the movement of the plunger 130 is injected into the molding space 102 while being pressurized.

17, since the pressing surface 133 of the plunger tip 132, which is in contact with the molten metal L, is inclined so as to face downward, the pressing surface 133 of the plunger tip 132 is in contact with the molten metal (Occurrence of turbulence) of the molten metal L is minimized when the molten metal L is pressurized.

The moving speed of the plunger 130 may be constant from start to end, or it may be gradually or stepwise variable. Preferably, the plunger 130 is divided into a low-speed section and a high-speed section so that the plunger 130 can be moved at a low speed and at a high speed. For example, the plunger 130 may be a low speed section in which the plunger 130 moves at a low speed from a starting point of movement of the plunger 130 to a certain point, and the section may be a high speed section in which the plunger 130 moves at high speed .

The molten metal L may be introduced through a portion where the pair of slide members 210 and 220 forming the communication hole 230 are coupled to each other. It is possible to prevent the molten metal L from flowing in the longitudinal direction of the mold 230.

delete

In the runner forming part 200, an air outlet 250 communicating with the outside is additionally formed on the surface of the sleeve 120 facing the discharge port 121 to discharge air that may exist at the initial stage of the discharge of the melt L. .

19, after the molten metal L has been injected into the molding space 102 and then solidified to form the molding object 50, the first mold 110 or the second mold 112 is rotated The first mold 110 and the second mold 112 are separated from each other.

At this time, the pair of slide members 210 and 220 moves in one direction, that is, leftward or rightward while being coupled to each other to move the communication hole 230 to cut off a portion connected to the injection channel 103, ) From the solidified molten metal (L).

A part of the molten metal L solidified near the discharge port 121 of the sleeve 120 may remain. When the second metal mold 112 is separated from the first metal mold 110, the slide members 210, The slide members 210 and 220 may be moved to the left and right to be taken out together with the take-out of the molding object 50 or may be discharged to the outside by moving the slide members 210 and 220 in a state separated from the molding object 50 .

The molding object 50 can be taken out of the molding space 102 as the mounting member 81 is moved in the direction in which the molding object 50 is taken out from the molding space 102. [ At this time, while the pressing member 300 presses the molding object 50 or the jig 90, the molding object 50 can be taken out more easily.

When the molding object 50 is taken out of the molding space 102 and the transferring member 95 is connected to the carrying hook 94 of the jig 90 as described above, ) May be carried to the following process.

The first part 91 or the second part 92 is detached from the shaft part 93 of the jig 90 and the object 50 is taken out from the shaft part 93 in the next step, 50 can be separated from the jig 90.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

50: object to be molded 80:
90: jig 102: molding space
110: first mold 112: second mold
120: Sleeve 130: Plunger
133: pressure face 150: lubricating oil supply part
200: runner forming part 300: pressing member

Claims (14)

A first mold;
A second mold coupled to the first mold in a detachable manner to form a space into which an object having a plurality of melt injection holes for injecting the melt together with the first mold is inserted; And
And a mounting portion on which the object is mounted so as to be movable in a direction in which the object is inserted into the space and in a direction taken out from the space,
The object is mounted on the mounting portion in a state of being coupled to the jig,
A carrying hook is provided at an upper portion of the jig,
The object is formed into a cylindrical shape having a hollow portion penetrating in the vertical direction therein,
Wherein the plurality of molten metal injection holes are formed in a circumferential direction and penetrate in a vertical direction,
The jig,
A shaft portion inserted into the hollow portion of the object;
A first portion formed to be larger than a diameter of the shaft portion above the shaft portion; And
And a second portion formed to be larger than a diameter of the shaft portion from below the shaft portion,
Wherein at least one of the first portion and the second portion is detachably coupled to the shaft portion. delete delete delete The method according to claim 1,
Wherein the object is formed by stacking a plurality of original plates vertically. delete The method according to claim 1,
Wherein the mounting portion includes a mounting member on which a mounting groove is formed in which at least a part of the second portion is inserted and fixed. The method according to claim 1,
A first step portion is provided between the first portion and the shaft portion, the first step portion having a diameter larger than an inner diameter of the hollow portion of the object and smaller than a diameter of a virtual circle passing through the plurality of molten metal injection holes,
A second step portion having a diameter smaller than an inner diameter of the hollow portion of the object and smaller than a diameter of an imaginary circle connecting the molten metal injection holes of the object is provided between the second portion and the shaft portion,
Wherein the object is disposed between the first stage jaw and the second stage jaw such that an upper surface of the object is in close contact with the first stage jaw and a lower surface of the object is in close contact with the second stage jaw, Die casting mold apparatus. 9. The method of claim 8,
Wherein the first mold is formed with an injection path through which molten metal is injected,
Wherein the injection path is communicated with a space formed by a lower side surface of the object and the second step portion. 10. The method according to any one of claims 1, 5, and 7 to 9,
The second mold is provided so as to be movable in a direction in which the object is inserted into the space and in a direction to be taken out of the space and is connected to the mount portion and moved together with the mount portion when the object is taken out, And a pressing member for pressing the object in a direction in which the object is taken out of the space. 11. The method of claim 10,
And a mount portion moving device connected to the mount portion to move the mount portion. 10. The method according to any one of claims 1, 5, and 7 to 9,
A sleeve connected to the first mold and supplied with molten metal to the inside of the sleeve; a molten metal supplied to the inside of the sleeve so as to be movable along the sleeve inside the sleeve, between the first mold and the second mold, And a plunger for introducing the plunger into the molding space of the mold,
The plunger has a plunger tip located inside the sleeve and in contact with the melt supplied to the inside of the sleeve,
And a lubricant supply unit connected to the sleeve to supply a lubricant to an outer circumferential surface of the plunger tip. 13. The method of claim 12,
Wherein the lubricant supply portion includes a housing portion in which the plunger tip is housed and a housing having a through hole communicating with the sleeve and through which the plunger tip passes and an injection port formed in the housing portion and into which lubricant is injected. 13. The method of claim 12,
Wherein the plunger tip is formed with a pressing surface contacting with the molten metal to press the molten metal toward the space when the molten metal is injected into the space,
Wherein the pressing surface is inclined with respect to an axis which is a center of a moving direction of the plunger tip.
KR1020120148839A 2012-12-18 2012-12-18 Molding apparatus for die casting KR101555521B1 (en)

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Publication number Priority date Publication date Assignee Title
KR20210142429A (en) 2020-05-18 2021-11-25 주식회사 바낙스 Die casting mold for drive gear of spinning reel

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JP2002361387A (en) 2001-05-30 2002-12-17 Toshiba Mach Co Ltd Diecasting device for motor rotor
JP2009297758A (en) 2008-06-16 2009-12-24 Kuroda Precision Ind Ltd Apparatus for manufacturing laminated iron core

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JP5026806B2 (en) * 2007-01-25 2012-09-19 ヤマハ発動機株式会社 Die casting mold
JP5070110B2 (en) * 2008-04-02 2012-11-07 本田技研工業株式会社 Manufacturing equipment for rotors for rotating electrical machines
KR20090126224A (en) * 2009-11-02 2009-12-08 (주)엔티티 Die casting apparatus
KR101187428B1 (en) * 2010-05-17 2012-10-02 주식회사 큐빅스 Tube for die casting apparatus and die casting apparatus having the same

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Publication number Priority date Publication date Assignee Title
JP2002361387A (en) 2001-05-30 2002-12-17 Toshiba Mach Co Ltd Diecasting device for motor rotor
JP2009297758A (en) 2008-06-16 2009-12-24 Kuroda Precision Ind Ltd Apparatus for manufacturing laminated iron core

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210142429A (en) 2020-05-18 2021-11-25 주식회사 바낙스 Die casting mold for drive gear of spinning reel

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