KR101509341B1 - Die casting machine - Google Patents

Abstract

A die casting machine (1) includes a spring member (82) for pressing a clamping device (9) towards a nozzle (61). A contact force between a runner (4) of a fixated frame (2) and the nozzle (61) during clamping can be adjusted as below. The nozzle (61) is inserted into the runner (4) of the fixated frame (2) while a movable frame (3) and the fixated frame (2) are clamped by a clamping cylinder (30). And the clamping device (9) is pressed by the spring member (82) towards the nozzle (61) while the spring member (82) is being twisted.

Description

[0001] DIE CASTING MACHINE [0002]

The present invention relates to a die cast machine.

A conventional die casting machine 100 as shown in Fig. 7 is known (see, for example, Patent Document 1). The die casting machine 100 is provided with a mold unit 117 which can be moved by a roller 119 on a rail 118 provided on the upper part of the main body 115. [ The mold unit 117 includes a stationary mold 124 fixed to the stationary mold mounting plate 123, a movable mold 125, an extrusion pin 127 for pushing out the product molded in the cavity 126, 125 and the first hydraulic cylinder 131 for driving the extruding pin 127, and the like. A hot water extracting apparatus 116 provided with a nozzle 121 for extracting molten metal from the cavity 126 is disposed on one side (right side in FIG. 5) of the mold unit 117.

The die casting machine 100 includes a second hydraulic cylinder 132 capable of advancing and retracting the mold unit 117 with respect to the hot water extracting apparatus 116. The rod 133 of the second hydraulic cylinder 132 presses the mold unit 117 to the hot water extracting apparatus 116 at a constant hydraulic pressure so that the hot water 122 of the fixed mold 124, The lowering of the contact pressure of the nozzle 121 of the device 116 is suppressed to prevent leakage of molten metal.

Japanese Patent Application Laid-Open No. 57-156867

However, in the above-mentioned die casting machine 100, since the hot water 122 of the fixed mold 124 and the nozzle 121 of the hot water extracting apparatus 116 are brought into contact with each other by the strong force of the second hydraulic cylinder 132 , The consumption of these contact portions is accelerated.

Since the hot water 122 of the fixed mold 124 and the nozzle 121 of the hot water extraction device 116 contact with each other with a strong force, the nozzle 121 is cooled by the cooling heat from the fixed mold 124 There is a problem that it is easy to clog.

The nozzle 121 is separated from the fixed mold 124 by performing the removal operation of the product by separating the mold unit 117 from the hot water extraction device 116 by the second hydraulic cylinder 132 for each casting, It is conceivable that the nozzle 121 is prevented from being clogged. However, it is not preferable to separate the mold unit 117 from the hot water extracting apparatus 116 for each casting, because it is connected by an increase in cycle time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a die cast machine in which nozzles are hardly clogged while suppressing consumption of contact portions between the nozzles and the stationary mold without increasing the cycle time.

The above object of the present invention is achieved by the following constitution.

(1) a clamping cylinder having a fixed mold, a movable mold having a movable mold, a clamping cylinder for moving the movable mold toward and away from the fixed mold, a housing for holding the clamping cylinder, A clamping device having a plurality of tie bars for slidably supporting the clamping device,

A die casting machine comprising a nozzle for injecting molten metal into a cavity formed in a stationary mold and a movable mold clamped, the nozzle having a nozzle penetrating the inside of the stationary mold and insertable into a mold formed in a fixed mold,

Further comprising a spring member urging the clamping device toward the nozzle,

After clamping the stationary and movable molds by the clamping cylinder, the nozzles are inserted into the fixed mold bath,

Wherein the clamping device adjusts the contact force between the fixed nozzle and the fixed nozzle at the time of clamping by pressing the clamping device toward the nozzle by the spring member while bending the spring member.

(2) a shaft rotatably supported on the housing and extending in a direction parallel to the tie bar,

Further comprising a connecting member for connecting the shaft and the mounting table on which the clamping device is mounted,

The die cast machine according to (1), wherein the shaft is screwed to the connecting member, and the shaft is rotated to bring the clamping device close to or away from the nozzle.

(3) The diecast according to (2), wherein the connecting member is a link mechanism capable of bringing the clamping device closer to or away from the nozzle by moving the shaft relative to the mounting table in a direction parallel to the tie bar machine.

(4) The spring member is screwed to the outer peripheral surface of the shaft to urge the housing toward the nozzle side,

The housing, on which the shaft is supported, is movable toward the nozzle by a predetermined distance with respect to the shaft,

After clamping the stationary and movable molds by the clamping cylinder, the nozzles are inserted into the fixed mold bath,

By the link mechanism, the clamping device is separated from the nozzle,

By fastening the spring member, the clamping device is moved to the nozzle side by a predetermined distance with respect to the shaft,

Further, by tightening the spring member, the clamping device is urged toward the nozzle side by the spring member while bending the spring member by a predetermined amount,

The die-cast machine according to (3), wherein the clamping device is brought close to the nozzle by a link mechanism.

(5) The link mechanism includes a first block fixed to the table, a first link rotatably connected to the first block, a second link rotatably connected to the first link, and a second link rotatably connected to the first block, And a second block in which a shaft is threadedly engaged,

The diecast machine according to (3) or (4), wherein the link mechanism is elongated and contracted by horizontally or tilting the first link and the second link relative to the tie bars.

(6) A male screw portion is formed on the outer peripheral surface of the shaft,

The spring member is a disc spring having a base portion formed with an internal thread portion engaging with a male thread portion on an inner circumferential surface thereof and a substantially disc-shaped plate portion extending from an end of the base-

The outer circumferential surface of the base has a shape capable of engaging a jig for rotating the dish spring,

The dish portion is formed so as to be inclined toward the housing side toward the outer peripheral side and extends to the housing beyond the end face of the base side of the base portion,

A concave portion is formed on an end face of the housing of the dish portion,

The die cast machine according to (4) or (5), wherein a plurality of slits are formed in the circumferential surface of the dish portion at predetermined intervals in the circumferential direction.

(7) The spring member is a dish spring having a base inserted into the outer peripheral surface of the shaft and a substantially disc-shaped dish portion extending from the end of the base on the housing side toward the outer periphery,

The dish portion is formed so as to be inclined toward the housing side toward the outer peripheral side and extends toward the housing side than the end face on the housing side of the base portion,

A concave portion is formed on an end face of the dish portion on the housing side,

A plurality of slits are formed on the outer peripheral surface of the dish portion at predetermined intervals in the circumferential direction,

The dish spring is inserted into the outer peripheral surface of the shaft,

A male screw portion is formed on the outer peripheral surface of the shaft,

A fastening member formed on an inner peripheral surface of a female screw portion screwed with the male screw portion is disposed so as to sandwich a disc spring between the fastening member and the housing,

The outer circumferential surface of the fastening member is shaped so as to engage with a jig for rotating the fastening member,

By tightening the fastening member, the spring member can press the housing toward the nozzle side,

The housing, on which the shaft is supported, is movable toward the nozzle by a predetermined distance with respect to the shaft,

After clamping the stationary and movable molds by the clamping cylinder, the nozzles are inserted into the fixed mold bath,

By the link mechanism, the clamping device is separated from the nozzle,

By fastening the fastening member, the clamping device is moved toward the nozzle by a predetermined distance relative to the shaft,

Further, by fastening the fastening member, the clamping device is urged toward the nozzle side by the spring member while bending the spring member by a predetermined amount,

The die-cast machine according to (3), wherein the clamping device is brought close to the nozzle by a link mechanism.

According to the die casting machine of the present invention, after inserting the nozzle into the fixed mold bath while clamping the stationary mold and the movable mold by the clamping cylinder, the clamping device clamps the nozzle by the spring member while bending the spring member Thereby adjusting the fixed flow rate at the time of clamping and the contact force of the nozzle.

Therefore, the clamping force of the fixed mold at the time of clamping and the contact force of the nozzle are increased by the amount of deflection of the spring member from the state immediately after the nozzle is inserted into the fixed mold bath, so that at the time of clamping, It is possible to contact the nozzle with a certain preload. As a result, it is possible to prevent the molten metal from leaking out, and it is possible to carry out the injection molding appropriately.

Further, at the time of clamping, since the stationary die and the nozzle are in strong contact with each other, a force is applied to the stationary die (clamping device) in a direction to be spaced from the nozzle as a reaction force. Then, the reaction force applied to the clamping device is transmitted to the spring member, and the spring member is absorbed by the bending. As described above, since the force generated in the clamping device can be absorbed by the spring member, it is possible to prevent an excessive load from being applied to the fixed member and the member such as the nozzle, and to prevent deformation, consumption and breakage of these members It is possible.

In addition to the injection molding, when the clamping by the clamping cylinder is released, that is, when the clamping is performed at the low pressure or the mold is opened, the pressing force by the clamping cylinder is reduced, so that the contact force between the fixed mold and the nozzle is reduced. Further, by reducing the contact force between the fixed die and the nozzle, the reaction force applied to the clamping device is also reduced, and the amount of deflection of the spring member is reduced. In addition, at the time of high-pressure clamping, the metal tie bar is subjected to a load, the cross-sectional area thereof is reduced and the entire length is elongated. However, when the high-pressure clamping is released, the tie bar is not elongated. . Therefore, the contact force between the fixed die and the nozzle is further reduced. As described above, since only the clamping by the clamping cylinder is released, the contact force between the stationary mold and the nozzle can be reduced, so that the consumption of the contact portion of the nozzle and the fixed contact can be suppressed without increasing the cycle time , It is possible to suppress the nozzle tip from becoming cold and hard.

1 is a schematic diagram of a die cast machine;
Fig. 2 is a sectional view of a main part of a clamping device, showing a state in which a disc spring is released; Fig.
Fig. 3 is a sectional view of a main portion of the clamping device, showing a state in which the flat spring is in contact with the housing; Fig.
4 is a sectional view of a main portion of a clamping device, showing a state in which a disc spring is engaged;
5 is a plan view of the dish spring;
6 is a cross-sectional view of a main portion of a clamping device according to a modification, showing a state in which a flat spring is in contact with a housing;
7 is a schematic diagram of a conventional die cast machine;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of a die casting machine according to the present invention will be described in detail with reference to the drawings. Further, the drawings are to be viewed in the direction of the reference numerals.

1, the die casting machine 1 includes a clamping device 9, a loading table 70 on which the clamping device 9 is mounted, (60).

The clamping device 9 includes a fixed plate 10 provided with a fixed die 2, a movable plate 20 provided with a movable die 3 so as to face the fixed die 2, A housing 40 for holding the outer circumferential surface 31 of the clamping cylinder 30 at the inner circumferential surface 41; a fixed plate 10; a movable plate 20; And a plurality of tie bars 50 made of metal that connect the movable plate 20 and the movable plate 20 to each other and also slidably support the movable plate 20 between the fixed plate 10 and the housing 40.

1, only the outer tube (outer circumferential surface 31) of the clamping cylinder 30 is shown, but a piston, a piston rod or the like not shown is provided in the inside thereof. It is possible to move the movable plate 20 forward and backward by fixing the movable plate 20 to the tip end of the piston rod and reciprocating the piston rod.

Although only two tie bars 50 are shown in Fig. 1, four tie bars 50 are provided which actually pass through the four corners of the fixed board 10, the movable board 20 and the housing 40 . Both ends of the tie bar 50 protrude to the outside through the fixing plate 10 and the housing 40 and fixed to the tie bar 50 by the nuts 55, The panel 10 and the housing 40 are connected and fixed. In the figure, in the direction parallel to the direction in which the tie bars 50 extend, the direction toward the fixed base 10 side is the X1 direction, the direction toward the housing 40 side is the X2 direction, and X1 And the vertical direction with respect to the direction (X2) is the Y direction.

The hot water injection apparatus 60 has a nozzle 61 which penetrates the interior of the fixed base 10 in the X1 (X2) direction and is insertable into the hot water duct 4 formed by the stationary mold 2, It is possible to inject the molten metal into the cavity 5 formed by the clamped fixed mold 2 and the movable mold 3 through the through holes 61.

The housing 40 has a body frame 42 for holding the clamping cylinder 30 and a shaft fixing frame 43 extending in the X1 (X2) direction. The shaft fixing frame 43 has a shaft 80 which is rotatably supported on the inner circumferential surface 44 in the X1 (X2) direction and is rotatably supported by a shaft 46 In the axial direction. The shaft 80 is connected to the loading table 70 by a link mechanism 90 as a connecting member. The shaft fixing frame 43 is a part of the shaft fixing frame 43 which faces the second block 94 in the Y direction so that the shaft 80 can be screwed onto the second block 94 of the link mechanism 90 It is cut off.

The link mechanism 90 includes a first block 91 fixed to the stage 70 and extending in the Y direction, a first link 92 rotatably connected to the first block 91, A second link 93 rotatably connected to the X1 direction end of the second link 93 and a second link 93 rotatably connected to the X1 direction end of the second link 93 and to the shaft fixing frame 43 in the X1 And has a second block 94 into which a shaft 80 is screwed.

Here, in a state in which the lever 95 connected to the first link 92 is horizontal in the X1 (X2) direction (the state shown in Fig. 1), the first and second links 92 and 93 are X1 ) Direction, and the link mechanism 90 is in the most extended state. Further, when the link mechanism 90 is in the most extended state, the first link 92 comes into contact with the stopper 71 provided on the loading table 70. When the lever 95 is rotated in the Y direction, the connecting portions 96 of the first and second links 92 and 93 are displaced in the Y direction so that the first and second links 92 and 93 are moved in X1 (X2) direction, and the link mechanism 90 is in a contracted state.

Therefore, when the link mechanism 90 is expanded and contracted, the shaft fixing frame 43 (the housing 40) moves in the X1 (X2) direction through the shaft 80 screwed to the second block 94, The entire clamping device 9 approaches or is spaced toward the nozzle 61 side.

When the shaft 80 engaged with the second block 94 is rotated, the shaft 80 moves in the X1 (X2) direction with respect to the second block 94, so that the shaft 80 is supported The shaft fixing frame 43 (the housing 40) moves in the X1 (X2) direction so that the entire clamping device 9 approaches or is spaced toward the nozzle 61 side.

2, a portion of the outer circumferential surface of the shaft 80 which is exposed to the outside of the cover 46 is provided with a male screw portion 83. The male screw portion 83 is provided with a plate spring 82 are screwed together. The diaphragm spring 82 has a base portion 84 formed with an internally threaded portion 85 which is screwed into the male threaded portion 83 on the inner circumferential surface thereof and a substantially circular plate portion 84 extending from the end in the X1 direction of the base portion 84 to the outer circumferential side. (86).

5, the end portion of the outer peripheral surface 87 of the base portion 84 in the X2 direction has a hexagonal shape so as to engage with a jig for rotating the diaphragm spring 82. As shown in Fig. The shape of the outer peripheral surface 87 may be any shape corresponding to the shape of a jig (not shown), and may be, for example, an octagonal shape.

The dish portion 86 is formed so as to be inclined in the X1 direction as it goes toward the outer peripheral side and extends in the X1 direction slightly more than the X1 direction end face 88 of the base portion 84. [ A concave portion 89 recessed in the X2 direction is formed on the end surface in the X1 direction of the dish portion 86. The concave portion 89 is formed so as to be concaved in the X1 direction as it goes toward the inner circumferential side. A plurality of slits 99 are formed in the dish portion 86 at predetermined intervals in the circumferential direction. Since the dish portion 86 has the concave portion 89 and the plurality of slits 99 as described above, the dish portion 86 has flexibility in the X1 (X2) direction.

The diaphragm spring 82 thus configured is screwed into the shaft 80 from the direction X2 and fastened to bring the dish portion 86 into contact with the cover 46 (housing 40) of the shaft fixing frame 43 , It is possible to urge the housing 40 toward the nozzle 61 side. When the diaphragm spring 82 is further engaged from the state in which the movement of the housing 40 is restricted (for example, the state shown in Fig. 4 to be described later), the distance from the cover 46 (the housing 40) The dish portion 86 is bent in the X2 direction by the reaction force.

A convex portion 81 protruding outward in the radial direction is formed on the outer circumferential surface of the shaft 80. A concave portion 81 is formed on the inner circumferential surface 44 of the shaft fixing frame 43 so as to correspond to the convex portion 81 of the shaft 80, A portion 45 is formed. The concave portion 45 is formed to be larger than the convex portion 81 by a predetermined distance A in the X1 (X2) direction. The shaft fixing frame 43 (the housing 40) To the nozzle 61 side by a predetermined distance (A) with respect to the nozzle 61.

The movement of the shaft fixing frame 43 with respect to the shaft 80 is performed by fastening the dish spring 82 in the X1 direction while fixing the shaft 80 so as not to rotate the plate spring 82, By pressing the cover 46 of the frame 43 for X1 in the X1 direction. By fastening the diaphragm spring 82 as described above, the shaft fixing frame 43 (the housing 40) is moved toward the nozzle 61 by a predetermined distance A relative to the shaft 80, and the clamping device 9 Can be brought close to the nozzle 61 side.

<Adjustment of Contact Force between Bottom 4 of Fixed Type 2 and Nozzle 61>

In the die-casting machine 1 configured as described above, adjustment of the contact force between the nozzle 4 and the nozzle 61 of the stationary die 2 at the time of clamping is performed by the following method. Before the adjustment of the contact force, the clamping device 9 and the hot-water injection device 60 are spaced apart from each other in the X1 (X2) direction, and the nozzle 61 is inserted into the hot- .

First, the movable die 20 is driven by the clamping cylinder 30 so that the movable die 3 and the fixed die 2 are clamped.

Next, the lever 95 is horizontally moved in the X1 (X2) direction to move the entire clamping device 9 toward the nozzle 61, with the link mechanism 90 being in the most extended state. 2, the X1 direction side surface 81a of the convex portion 81 of the shaft 80 is inclined with respect to the X1 direction side surface 45a of the concave portion 45 of the shaft fixing frame 43 The contact state is established. The diaphragm spring 82 screwed to the shaft 80 is kept in a loose state so as not to contact the cover 46 of the frame for fixing the shaft 43.

Subsequently, the entire clamping device 9 is moved toward the nozzle 61 side by rotating the shaft 80, and the nozzle 61 is inserted into the molten metal duct 4 of the stationary die 2.

In this manner, the molten metal 4 of the stationary die 2 and the nozzle 61 come into contact with each other, but this is in a weak contact state (hereinafter referred to as &quot; weak nozzle touch state &quot;). There is a possibility that the molten metal leaks from between the stationary mold 2 and the nozzle 61. Therefore, it is necessary to adjust so as to further increase the contact force F between the molten metal 4 and the nozzle 61 at the time of clamping.

First, by rotating the lever 95, the link mechanism 90 is contracted, and the clamping device 9 as a whole is separated from the nozzle 61, and the fixed mold 2 is pushed out of the nozzle 61. This is because, in the weak nozzle touch state, it is difficult to move the stationary die 2 by tightening the diaphragm spring 82 as described below.

Next, as shown in Fig. 3, the dish spring 82 is fastened by a jig so that the dish portion 86 of the diaphragm spring 82 is brought into contact with the cover 46 of the shaft fixing frame 43 . At this time, as described above, since the dish portion 86 extends in the X1 direction with respect to the X1 direction end face 88 of the base portion 84, the base portion 84 is prevented from contacting the cover 46. [ From this state, the shaft fixing frame 43 (the housing 40) is fixed to the shaft 80 by pressing the cover 46 of the shaft fixing frame 43 by tightening the disc spring 82, (Fig. 4). That is, the stationary die 2 is brought close to the nozzle 61 by a predetermined distance A.

At this time, the X2 direction side surface 81b of the convex portion 81 of the shaft 80 and the X2 direction side surface 45b of the concave portion 45 of the shaft fixing frame 43 come into contact with each other, The movement of the shaft fixing frame 43 is regulated. Further, when the plate spring 82 is fastened, the dish portion 86 of the plate spring 82 elastically deforms and begins to warp. The cover 46 of the shaft fixing frame 43 is fixed to the nozzle (not shown) by the dish portion 86 of the diaphragm spring 82 while bending the dish portion 86 of the diaphragm spring 82 by a predetermined amount d2 61). That is, the stationary die 2 is pressed toward the nozzle 61 by the amount of deflection d2 of the dish portion 86 of the diaphragm spring 82. [

When the lever 95 is rotated to return the link mechanism 90 to the most elongated state, the contact force F between the blanket 4 of the fixed die 2 and the nozzle 61 becomes equal to the contact force F0. More specifically, the stationary mold 2 is closer to the nozzle 61 by a predetermined distance A, so that the dish portion 86 of the dish spring 82 is further bent by the predetermined distance A, The fixed mold 2 is pressed toward the nozzle 61, so that the contact force increases by F1. Further, as described above, since the stationary die 2 is pressed toward the nozzle 61 by the amount of the plate portion 86 of the diaphragm spring 82 by the predetermined amount d2, the contact force increases by F2. Therefore, the contact force F between the blanket 4 of the stationary mold 2 and the nozzle 61 becomes (F0 + F1 + F2), and the state in which the blanket 4 of the stationary mold 2 and the nozzle 61 are in strong contact Quot; steel nozzle touch state &quot;) is realized.

As described above, since the steel nozzle touch state can be realized, the molten metal 4 of the stationary mold 2 can be brought into contact with the nozzle 61 with a certain degree of preload at a time of high-pressure clamping in which the molten metal is injected, It is possible to prevent leakage of the molten metal, and it is possible to carry out injection molding appropriately. Here, the "high-pressure clamping" state is a state in which the movable die 20 and the movable die 3 are driven by the clamping cylinder 30 to reciprocate while the die-casting machine 1 is operating, Refers to a state in which the movable die 3 and the fixed die 2 are clamped in contact with each other and the molten metal is injected into the cavity 5 from the molten metal duct 4.

The contact force F (= F0 + F1 + F2) in the steel nozzle touch state is determined by the deflection amount d1 of the dish portion 86 of the diaphragm spring 82 by the predetermined distance A and the diaphragm amount d1 of the diaphragm spring 82 86, it is possible to change the contact amount increase amounts F1, F2 and to adjust them to a desired value. The shape of the shape of the concave portion 89 or the shape of the plurality of slits 99 and the material of the dish portion 86 of the plate spring 82 are set appropriately so that the amounts of deflection d1 and d2 become a desired value .

As described above, according to the die casting machine 1 of the present embodiment, the fixed die 2 and the movable die 3 are clamped by the clamping cylinder 30, The clamping device 9 is separated from the nozzle 61 by the link mechanism 90 and the diaphragm spring 82 is tightened after the nozzle 61 is inserted into the nozzle 61 The clamping device 9 is moved to the nozzle 61 side by a predetermined distance A with respect to the shaft 80 and the plate spring 82 is fastened so that the plate spring 82 is bent by the predetermined amount d2, The clamping device 9 is urged toward the nozzle 61 side by the spring 82 and the clamping device 9 is brought close to the nozzle 61 by the link mechanism 90 to realize the strong nozzle touch state. That is, when the stationary die 2 is brought close to the nozzle 61 by a predetermined distance A, the diaphragm spring 82 is bent by the amount of deflection d1 to increase the contact force by F1, and by tightening the diaphragm spring 82, The contact force F of the fixed die 2 and the nozzle 61 becomes F0 + F1 + F2, so that the strong nozzle touch state becomes equal to F0 + F1 + F2 .

Therefore, at the time of high-pressure clamping in which the injection of the molten metal is performed, the molten metal 4 of the stationary mold 2 can be brought into contact with the nozzle 61 with a certain degree of preload, so that the molten metal can be prevented from leaking , It is possible to carry out injection molding appropriately.

In the high-pressure clamping, since the hot water 4 of the fixed mold 2 and the nozzle 61 are in strong contact with each other, the fixed mold 2 (clamping device 9) The force is applied in the direction (X2 direction). Then, the reaction force applied to the clamping device 9 is transmitted to the diaphragm spring 82, so that the diaphragm spring 82 is absorbed by the bending. Since the force generated in the clamping device 9 can be absorbed by the diaphragm spring 82 as described above, the configuration of the clamping device 9 such as the fixed die 2, the nozzle 61, the tie bar 50, It is possible to prevent an excessive load from being applied to the member, and it is possible to prevent deformation, consumption and breakage of these members.

Since the pressing force by the clamping cylinder 30 is reduced when the high-pressure clamping by the clamping cylinder 30 is released, that is, when the clamping cylinder 30 is clamped or opened at a low pressure, And the contact force F of the nozzle 61 decreases by? 1 (F = F0 + F1 + F2-? 1).

Further, since the contact force F is reduced by? 1, the reaction force applied to the clamping device 9 also decreases, and the amount of deflection of the diaphragm spring 82 decreases. In addition, at the time of high-pressure clamping, the metallic tie bar 50 is subjected to a load and its cross-sectional area is reduced and the entire length is extended. However, when the high-pressure clamping is released, the tie bar 50 is not stretched, The deflection amount of the disc spring 82 is further reduced. This reduces the urging force of the diaphragm spring 82 against the shaft fixing frame 43 so that the contact force F between the hot water 4 of the fixed die 2 and the nozzle 61 is also reduced by? = F0 + F1 + F2 -? 1 -? 2).

Since the values of? 1 and? 2 increase as the high-pressure clamping force by the clamping cylinder 30 increases, F = F0 + F1 + F2 -? 1 -? 2 <0, The nozzle 4 and the nozzle 61 may be spaced apart from each other.

As described above, by only releasing the high-pressure clamping by the clamping cylinder 30, the contact force F between the blanket 4 of the stationary mold 2 and the nozzle 61 can be reduced, 2, the contact force F can be made zero by separating the nozzle 4 and the nozzle 61 from each other. Therefore, it is possible to suppress consumption of the contact portion between the hot water 4 and the nozzle 61 of the stationary mold 2 without increasing the cycle time, and to prevent the tip of the nozzle 61 from becoming cold and hardening .

According to the die casting machine 1 of the present embodiment, the shaft 80 is screwed to the link mechanism 90 to rotate the shaft 80 so that the clamping device is brought close to the nozzle 61 Or spaced apart. Therefore, by rotating the shaft 80, the entire clamping device 9 is brought close to the nozzle 61, and the state in which the hot water 4 of the fixed mold 2 and the nozzle 61 are in weak contact ).

According to the die casting machine 1 of the present embodiment, the shaft 80 is moved with respect to the mounting table 70 in the X1 (X2) direction so that the clamping device 9 is brought close to the nozzle 61 And a link mechanism (90) capable of separating, Therefore, in addition to the shaft 80, the clamp mechanism 9 can be spaced apart from the nozzle 61 by the link mechanism 90, so that it is easy to make the nozzle touch state. For example, if the clamping device 9 is moved by the link mechanism 90 so as to slightly move the clamping device 9 by the rotation of the shaft 80, It is possible to insert the nozzle 61 into the blanket 4 of FIG.

The present invention is not limited to the embodiments described above, and can be appropriately changed within the scope not deviating from the gist of the present invention.

For example, in the above-described embodiment, the diaphragm spring 82 is structured so that the female screw portion 85 formed on the inner peripheral surface of the base portion 84 is screwed to the male screw portion 83 on the outer peripheral surface of the shaft 80 However, as shown in FIG. 6, the internal thread 85 may not be formed on the inner peripheral surface of the base 84.

In this case, the inner diameter of the inner peripheral surface of the base portion 84 is set slightly larger than the outer diameter of the outer peripheral surface of the shaft 80, and the base portion 84 of the diaphragm spring 82 is inserted into the outer peripheral surface of the shaft 80. The male threaded portion 83 on the outer peripheral surface of the shaft 80 is formed on the X2 direction side with respect to the diaphragm spring 82. [ A nut 97 (fastening member) formed on the inner peripheral surface of the plate spring 82 on the X2 direction side is provided with a female screw portion 98 screwed to the male screw portion 83 of the shaft 80, And the nut 97 come into contact with each other. That is, the cover 46 (housing 40) and the diaphragm spring 82 have a positional relationship in which the diaphragm spring 82 is sandwiched in the X1 (X2) direction. The outer circumferential surface of the nut 97 has a shape corresponding to the shape of the jig, for example, a hexagonal shape so that the jig for rotating the nut 97 is caught.

Therefore, in the case of this modification, the nut (97) is fastened by the jig so that the cover (46) (housing (40)) is urged toward the nozzle (61) side by the dish portion (86) It is possible to adjust the contact force between the molten metal bath 4 and the nozzle 61 by the same method as the above-described embodiment.

The concave portion 45 of the shaft fixing frame 43 is formed larger by a predetermined distance A in the X1 (X2) direction as compared with the convex portion 81 of the shaft 80 The housing 40 is configured to be movable toward the nozzle 61 by the predetermined distance A with respect to the shaft 80. The present invention is not limited to this configuration and may be modified such that the predetermined distance A It may be set to zero.

In this case, it is not necessary to once push the fixed mold 2 from the nozzle 61 by the link mechanism 90 when the nozzle nozzle is touched from the weak nozzle touch state, It is possible to increase the contact force F between the hot water 4 of the stationary mold 2 and the nozzle 61 by F2 (F = F0 + F2). Therefore, the same effects as those of the above-described embodiment can be achieved.

1: Die casting machine
2: Fixed type
3: Movable type
4: Tangdo
5: Cavity
9: Clamping device
10: Fixed panel
20:
30: Clamping cylinder
31:
40: Housing
41: inner peripheral surface
42: Body frame
43: frame for fixing the shaft
44: inner peripheral surface
45:
45a: X1 direction side
45b: X2 direction side
46: cover
50: Taiba
55, 56: Nuts
60: hot water injection device
61: Nozzle
70: Stacking table
71: Stopper
80: Shaft
81: convex portion
81a: X1 direction side
81b: X2 direction side
82: Plate spring (spring member)
83: Male threads
84: donation
85: Female threads
86: dish portion
87:
88: End face in X1 direction
89:
90: Link mechanism (connecting member)
91: first block
92: first link
93: second link
94: second block
95: Lever
96: Connection
97: Nut (fastening member)
98: female thread part
99: slit
A:

Claims (7)

A clamping cylinder 30 for moving the movable platen 20 toward and away from the fixed platen 10 and a fixed platen 2 provided with a fixed mold 2, A housing 40 for holding the clamping cylinder 30 and a movable plate 20 connected to the fixed plate 10 and the movable plate 20 so as to be slidable A clamping device (9) having a plurality of tie bars (50)
And a nozzle 61 which penetrates the inside of the fixed barrel 10 and is insertable into the blanket 4 formed in the fixed barrel 2. The fixed barrel 2 and the movable barrel 3, And a hot water injection device (60) for injecting molten metal into the cavity (5) to be formed, the die casting machine (1)
Further comprising a spring member (82) for urging the clamping device (9) toward the nozzle (61)
After the nozzle 61 is inserted into the blanket 4 of the stationary mold 2 in a state where the stationary mold 2 and the movable mold 3 are clamped by the clamping cylinder 30,
The clamping device 9 is urged toward the nozzle 61 by the spring member 82 while bending the spring member 82 so that the clamping force of the clamping device 2 The contact force of the nozzle 61 is adjusted,
A shaft 80 rotatably supported on the housing 40 and extending in a direction parallel to the tie bars 50,
Further comprising a connecting member (90) for connecting the shaft (80) to a loading table (70) for loading the clamping device (9)
The shaft 80 is screwed to the connecting member 90 so that the clamping device 9 can be brought close to or spaced from the nozzle 61 by rotating the shaft 80 (1). &Lt; / RTI &gt; delete The apparatus according to claim 1, wherein the connecting member (90) moves the shaft (80) relative to the loading table (70) in a direction parallel to the tie bar (50) Is a link mechanism (90) capable of bringing it closer to or away from the body (61) of the diecasting machine (1). 4. The apparatus according to claim 3, wherein the spring member (82) is screwed to an outer circumferential surface of the shaft (80) to urge the housing (40) toward the nozzle (61)
The housing 40 in which the shaft 80 is supported is movable toward the nozzle 61 by a predetermined distance A with respect to the shaft 80,
After the nozzle 61 is inserted into the blanket 4 of the stationary mold 2 in a state where the stationary mold 2 and the movable mold 3 are clamped by the clamping cylinder 30,
The link mechanism 90 separates the clamping device 9 from the nozzle 61,
The clamping device 9 is moved toward the nozzle 61 by the predetermined distance A with respect to the shaft 80 by fastening the spring member 82,
The clamping device 9 is urged toward the nozzle 61 by the spring member 82 while the spring member 82 is bent by a predetermined amount by tightening the spring member 82,
Characterized in that the clamping device (9) is brought close to the nozzle (61) by the link mechanism (90). The apparatus according to claim 3 or 4, wherein the link mechanism (90) comprises a first block (91) fixed to the loading table (70), a first link (91) rotatably connected to the first block A second link 93 rotatably connected to the first link 92 and connected to the second link 93 so that the shaft 80 is screwed into the second link 93, (92)
Characterized in that the link mechanism (90) expands and contracts by horizontally or tilting the first link (92) and the second link (93) with respect to the tie bar (50) (One). 5. The connector according to claim 4, wherein a male threaded portion (83) is formed on an outer peripheral surface of the shaft (80)
The spring member 82 has a base portion 84 formed on its inner circumferential surface with a female screw portion 85 screwed into the male screw portion 83 and a base portion 84 extending from the end of the base portion 84 toward the outer circumferential side Is a disc spring (82) having an approximately disc-shaped dish portion (86) extending therefrom,
The outer circumferential surface of the base 84 is shaped to be able to hang a jig for rotating the dish spring 82,
The dish portion 86 is formed to be inclined toward the housing 40 toward the outer circumferential side so that the base portion 84 extends toward the housing 40 more than the end face 88 on the housing 40 side. And,
A concave portion 89 is formed on an end face of the housing 40 of the dish portion 86,
Characterized in that a plurality of slits (99) are formed on the outer peripheral surface of the dish portion (86) at predetermined intervals in the circumferential direction. 4. The apparatus according to claim 3, wherein the spring member (82) comprises a base portion (84) inserted into the outer circumferential surface of the shaft (80), and a substantially circular plate extending from the end of the base portion (84) (82) having a dish portion (86) of a shape,
The dish portion 86 is formed to be inclined toward the housing 40 toward the outer peripheral side so that the base portion 84 is extended toward the housing 40 side with respect to the end face 88 of the housing 40 side. And,
A concave portion 89 is formed on an end face of the dish portion 86 on the side of the housing 40,
A plurality of slits 99 are formed on the outer peripheral surface of the dish portion 86 at predetermined intervals in the circumferential direction,
The disc spring 82 is inserted into the outer peripheral surface of the shaft 80,
A male threaded portion 83 is formed on the outer peripheral surface of the shaft 80,
The coupling member 97 formed on the inner peripheral surface of the female screw portion 98 screwed to the male screw portion 83 is disposed so as to sandwich the diaphragm spring 82 between the coupling member 97 and the housing 40 And,
The outer circumferential surface of the fastening member 97 is shaped to be able to hang a jig for rotating the fastening member 97,
By tightening the fastening member 97, the spring member 82 can press the housing 40 toward the nozzle 61 side,
The housing 40 in which the shaft 80 is supported is movable toward the nozzle 61 by a predetermined distance A with respect to the shaft 80,
After the nozzle 61 is inserted into the blanket 4 of the stationary mold 2 in a state where the stationary mold 2 and the movable mold 3 are clamped by the clamping cylinder 30,
The link mechanism 90 separates the clamping device 9 from the nozzle 61,
The clamping device 9 is moved toward the nozzle 61 by the predetermined distance A with respect to the shaft 80 by tightening the fastening member 97,
The clamping device 97 is urged to urge the clamping device 9 toward the nozzle 61 by the spring member 82 while bending the spring member 82 by a predetermined amount,
Characterized in that the clamping device (9) is brought close to the nozzle (61) by the link mechanism (90).

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