KR101375643B1 - Die-casting die having linear moving member for runner cross sectional area control device - Google Patents

Abstract

The present invention relates to a die-casting mold having a linear moving object for a runner cross sectional area controlling device comprising: a linear moving object which is arranged in a fixing mold to be able to be linearly moved, and whose one end is in contact with a molten metal inside the runner; and a screw member which is screwed to a screw hole of the fixing mold, and which is always in contact with the linear moving object by a spring. A cross sectional area of a runner can be accurately, easily and rapidly controlled by a simple configuration. The controlled cross sectional area of a runner can be certainly, easily, and rapidly maintained with inexpensive costs. Moreover, since a linear moving object which is in contact with a molten metal inside a runner for controlling a cross sectional area of a runner comprises a first member and a second member combined to the first member to be able to be separated, costs required for the formation and maintenance of the linear moving object can be reduced.

Description

Die-casting die having linear moving member for runner cross sectional area control device

The present invention relates to a die-casting mold, and more particularly, to a runner cross-sectional area adjustment mechanism, which enables to easily and quickly and reliably control the cross-sectional area of a runner through which molten metal flows and maintain the adjusted runner cross-section by a simple configuration. Eggplant relates to die casting mold.

The die casting mold used for mass production of a metal product generally consists of a stationary mold 1 and a movable mold 2, as shown in FIG. The stationary mold 1 of the die casting mold 1A is fixed to the main body 4a of the die casting molding machine 4, and the movable mold 2 is provided on the movable plate 4b of the die casting molding machine 4. The movable plate 4b is connected to the rod 4d of the hydraulic cylinder 4c, and is reciprocated along the rail 4e by the operation of the hydraulic cylinder 4c, and at the time of the reciprocating movement, the movable mold 2 The fixed mold 1 is in close contact or spaced apart. Reference numerals 10, 20 and 100 in parentheses are given for the purpose of illustrating the present invention, respectively.

As shown in Fig. 2, a molten metal inlet 1k is formed in the stationary mold 1, and a sleeve 9 for supplying molten metal from the outside is connected to the molten metal inlet 1k. In the sleeve 9, a plunger 9a for pressing the molten metal in the sleeve 9 is disposed. When the stationary mold 1 and the movable mold 2 are in close contact with each other, the space 3 including the cavity 3a, the gate 3b, and the runner 3c is formed between the stationary mold 1 and the movable mold 2. ) The cavity 3a is a molding space filled with molten metal to be molded into a metal product, the gate 3b is connected to the cavity 3a, and the runner 3c is connected between the molten metal inlet 1k and the gate 3b. It's the part that connects. Depending on the mold, a plurality of cavities 3a and gates 3b may be provided, and the plurality of gates may be connected to one runner.

When the molten metal supplied into the molten metal inlet 1k (specifically, the sleeve connected to the molten metal inlet) is pressed by the plunger 9a in the state in which the stationary mold 1 and the movable mold 2 were in close contact with each other, The molten metal flows along the runner 3c, is blown into the cavity 3a through the gate 3b, and filled in the cavity 3a. The molten metal in the cavity 3a solidifies into a desired metal product (metal product having a shape corresponding to the shape of the cavity).

On the other hand, if the speed of the molten metal sprayed into the cavity through the gate (hereinafter referred to as the 'spraying speed') is too fast, poor deposition occurs, and if the spraying speed is too slow, the molten metal is not completely filled in the cavity, that is, the poor melt ( Poor molding) occurs. In general, the ejection speed in the die casting mold is inversely related to the flow cross section of the molten metal ejected into the cavity through the gate (hereinafter referred to as the ejection cross section). Can be obtained. However, the optimum blowing speed in each die casting mold depends on various factors such as the size, shape, and thickness of the product to be molded, and is not theoretically established regarding the optimum value of the blowing speed. Therefore, it is difficult to know in advance what is the optimum blowing speed in the die during the design or manufacturing stage of the die casting die. Therefore, depending on the experience of the operator, the blowing speed that is determined to be the best in the die casting die situation is set. The die casting mold is manufactured after calculating the ejection cross-sectional area of the size that can be obtained. Then, the produced die-casting die is installed in a die-casting molding machine to mold a metal product (prototype), and it is determined whether the current blowing speed is appropriate through the prototype. If the defect occurs in the prototype, the ejection speed is fast, and the mold modification is performed to increase the ejection area. If the defect is produced in the prototype, the ejection speed is slow, and the mold modification is performed to reduce the ejection area.

In general, the ejection cross section is corrected by correcting the cross sectional area of the runner in a portion adjacent to the gate. That is, a method of widening or reducing the cross sectional area of the runner in a portion adjacent to the gate is made to widen or reduce the ejection cross section (flow cross section of the molten metal ejected into the cavity).

However, the above-described mold modification work for changing the cross-sectional area of the runner involves a cutting process of the mold of the corresponding site or a process of forming the welded portion in the mold and then cutting the welded portion, so that the corrective work itself is not only cumbersome. For such a mold modification, the die casting mold installed in the die casting molding machine must be separated from the die casting molding machine, and after the mold modification is completed, the die casting mold needs to be installed in the die casting molding machine again for the production of the prototype.

Moreover, the mold modification described above is not often done only once, and once the mold modification is made, the prototype is again molded and the prototype is checked to determine whether the proper ejection speed is maintained, and then the mold modification is performed again according to the result. It is common to do. Since the mold modification work is usually performed several times and in a special case over a dozen times, there is a problem that the process of adjusting the cross-sectional area of the runner for achieving the optimum ejection speed is quite cumbersome.

The present invention has been made to solve the problems in the conventional die casting mold as described above, the adjustment of the runner cross-sectional area and maintenance of the adjusted runner cross-sectional area can be quickly, easily and reliably at a low cost by a simple configuration It is an object of the present invention to provide a die casting mold having a linear moving body for a runner cross-sectional area adjustment mechanism.

Another object of the present invention is a straight line for a runner cross-sectional area adjustment mechanism, which is movable in the direction of entering and retracting with respect to the runner for adjusting the cross-sectional area of the runner, and the cost for forming a member made to come into contact with the molten metal in the runner can be reduced. It is an object to provide a die casting mold having a moving body.

In order to achieve the above objects, the die casting mold having the linear moving body for the runner cross-sectional area adjusting mechanism is fixed to the die casting molding machine and has a molten metal inlet, and movable coupled to the die casting molding machine so as to be in close contact with and spaced from the fixed mold. And a mold, wherein when the fixed mold and the movable mold are in close contact with each other, a space portion is formed between the fixed mold and the movable mold, and the space portion includes a cavity which is a molding space for a metal product, a gate connected to the cavity, A die casting mold comprising a runner connecting the molten metal inlet and the gate so that the molten metal supplied to the molten metal inlet is ejected into the cavity through the gate and filled in the cavity, wherein the stationary mold faces the movable mold. From the first side to the second side opposite the first side A through hole penetrating in a first direction perpendicular to the longitudinal direction of the nucleus is formed, and the through hole of the fixed mold has a non-circular cross section and has a guide hole open to the first surface to communicate with the runner, and the guide hole; It is made of a screw hole that is open to the second surface and the inner circumferential surface is formed with a female threaded portion, and is coupled to the guide hole of the fixed mold so that linear movement in the first direction is possible and rotation is impossible. In order to change the cross-sectional area of the runner while the depth of entry into the runner is adjusted, a linear movable body having one end portion in contact with the molten metal in the runner, and a male screw portion fastened to the female thread portion of the screw hole of the fixed mold, One end is arranged to be in contact with the other end of the linear movable body, the other end is the second surface of the fixed mold through the screw hole A spring member for elastically biasing the screw member exposed to the side, the linear movable member in a direction in which the other end of the linear movable member contacts the one end of the screw member, and a runner at a position where one end of the linear movable member is disposed A sensor for measuring at least one of the flow rate and the hydraulic pressure of the molten metal in the molten metal, and a display for displaying a value measured by the sensor, wherein the linear moving body comprises: a first member which is a part in contact with the molten metal in the runner; And a second member detachably coupled to the first member and contacting one end of the screw member, wherein the first member is formed of a material having a higher heat resistance than the second member. A rectangular groove portion is formed in the second member side end face of one member, and a groove portion of the first member is formed in the first member side end face of the second member. A rectangular protrusion is formed to be fitted so that the protrusion is fitted into the groove of the first member, thereby preventing relative rotation of the first member and the second member, and the screw penetrates the second member. It is fastened to the first member.

The die-casting mold of the present invention is a linear movable body which is arranged in the fixed mold so that only linear movement is possible and one end thereof is in contact with the molten metal in the runner, and a screw which is screwed into the screw hole of the fixed mold and is in constant contact with the linear movable body by spring. Since the member is provided, by simply rotating the screw member, the cross-sectional area of the runner can be adjusted quickly, easily and accurately. In addition, when the adjustment of the cross-sectional area of the runner is completed, even when a very high pressure molten metal flows in the runner, the linear moving body is supported by a screw member fastened to a screw hole of a fixed mold, whereby the runner cross-section is changed. Since the linear movement in the direction is prevented, the changed cross-sectional area of the runner can be reliably maintained unless the screw member is rotated. In addition, the linear movable body which is brought into contact with the molten metal in the runner for adjusting the cross-sectional area of the runner comprises a first member and a second member detachably coupled to the first member, thereby forming and maintaining the linear movable body. Maintenance costs can be reduced.

1 is a schematic diagram for explaining a general die casting molding machine.
2 is a schematic cross-sectional view of an example of a conventional die casting mold.
3 is a schematic cross-sectional view of a die casting mold having a linear moving body for a runner cross-sectional area adjustment mechanism according to an embodiment of the present invention.
4 is an enlarged view of the main part of the die casting mold shown in FIG.
5 is a schematic separated perspective view of the linear member and the screw member shown in FIG.
6 is a schematic cross-sectional view taken along the line VI-VI in FIG. 4.
FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. 4. FIG.
FIG. 8 is a view of a state in which the linear moving body of FIG. 4 is separated from a stationary mold. FIG.
9 and 10 are views of the state in which the linear moving body of FIG. 4 is moved.
11 is an exploded perspective view of another type of linear moving body applicable to the die casting mold of the present invention.
FIG. 12 is a schematic cross-sectional view of the die casting mold to which the linear moving body shown in FIG. 11 is applied. FIG.

Hereinafter, a die casting mold having a linear moving body for runner cross-sectional area adjustment mechanism according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, referring to FIGS. 3 to 7 of a die casting mold of an embodiment of the present invention together with FIG. 1, the die casting mold 100 of the present embodiment is similar to the die casting mold 1A of the conventional die casting mold 4. A fixed mold 10 fixed to the main body 4a of the main body 4a, and a movable mold 20 coupled to the movable plate 4b of the die casting molding machine 4 so as to be movable in a direction in which the fixed mold 10 is in close contact with and spaced apart from the fixed mold 10. The sleeve 9 is connected to the molten metal inlet 11 formed in the stationary mold 10. When the stationary mold 10 and the movable mold 20 are in close contact with each other, the space 30 formed between the stationary mold and the movable mold is formed in the cavity 31 and the cavity 31, which are molding spaces of the metal product. The runner 33 connecting the molten metal inlet 11 and the gate 32 so that the gate 32 to be connected and the molten metal supplied to the molten metal inlet 11 are ejected into the cavity 31 through the gate 32. The configuration is also not different from the conventional die casting mold.

On the other hand, the die-casting die 100 of the present embodiment is a runner cross-sectional area adjusting mechanism for enabling the cross-sectional area of the runner 33 to be adjustable, and includes a through hole 16 formed in the stationary mold 10 and a through hole 16 thereof. It is provided with a linear movable body 50, a screw member 60 and a spring 70 coupled to the.

The through hole 16 of the stationary mold 10 penetrates from the first surface 13 facing the movable mold 20 to the second surface 14 opposite to the first surface 13. Specifically, the extending direction (through direction) of the through hole 16 is a direction perpendicular to the longitudinal direction (F; flow direction of the melt) of the runner 33 at a portion where the through hole 16 is formed (hereinafter, referred to as a "flow direction"). , "First direction"). The through hole 16 is a guide hole 17 disposed on the first surface 13 side, and a screw hole 18 disposed on the second surface 14 side and opened toward the second surface 14. Consists of The guide hole 17 is opened to the first surface 13 so as to communicate with the runner 33, and has a non-circular cross section (a rectangular cross section in the present embodiment). The screw hole 18 is connected with the guide hole 17, and the internal thread part of the screw hole 18 is formed.

The linear movable body 50 is provided with a guide part 51. The guide portion 51 has a non-circular cross section (a square cross section corresponding to a square cross section of the guide hole in this embodiment) corresponding to the guide hole 17 of the fixed mold. It is in sliding contact with the inner circumferential surface of (17). The linear moving body 50 may be linearly moved along the extending direction (first direction) of the guide hole 17 while being guided by the guide part 51 and the guide hole 17, and rotating (first direction). Rotation of the virtual line extending to the center of rotation is impossible. Since one end of the linear moving body 50 is disposed in contact with the molten metal flowing in the runner 33, when the linear moving body 50 is linearly moved, a straight line with respect to the runner 33 according to the moving direction and the moving amount. The entry depth (entry amount) of the moving body 50 is adjusted, and as a result, the cross-sectional area (flow cross-sectional area of the melt) of the runner 33 is adjusted. The cross-sectional area of the adjusted runner will eventually be the ejection cross-sectional area (flow cross-sectional area of the molten metal ejected into the cavity through the gate), and the ejection cross-sectional area will be the ejection velocity (speed of the molten metal ejected into the cavity through the gate) and Have an inverse relationship. That is, the ejection speed is increased when the cross sectional area of the runner is reduced, and becomes smaller when the cross sectional area of the runner is increased.

An inclined surface 52 is formed at one end of the linear moving body 50, and an outward flange portion 53 for contacting the screw member described later is provided at the other end. The inclined surface 52 is inclined in a direction in which the depth of entry to the runner 33 is deeper (ie, a direction closer to the bottom surface of the runner) toward the downstream side in the flow direction F of the molten metal directed toward the cavity 31. have. Therefore, the molten metal which will pass between the end of the linear mover 50 and the bottom of the runner (the space between the end of the linear mover and the bottom of the runner corresponds to the runner whose cross-sectional area is adjusted) is the inclined surface 52. Since it is guided by), the flow resistance of the molten metal is reduced compared to the case without the inclined surface.

One end of the screw member 60 is in surface contact with the end surface of the outward flange portion 53 of the linear movable body 50 in a state capable of relative rotation. The other end of the screw member 60 can insert a tool such as a driver through the screw hole 18 on the second surface 14 side of the fixed mold, or the operator can directly rotate the screw member 60 by hand. It is exposed to the 2nd surface 14 side of the fixed mold through the screw hole 18 so that it may be.

The spring 70 is provided to elastically bias the linear movable body 50 in a direction in which the other end (outward flange portion 53) of the linear movable body 50 contacts one end of the screw member 60. . In this embodiment, as the spring 70, a compression coil spring disposed in the screw hole 18 is provided. One end of the compressed coil spring is supported by the stationary mold 10, and the other end is supported by the outward flange portion 53 of the linear moving body 50.

When the screw member 60 is rotated in the fastening direction with respect to the screw hole 18, the screw member 60 is rotated and moved in the direction approaching the runner 33. At this time, the linear moving body 50 which is in contact with one end of the screw member 60 through the outward flange portion 53 is pushed by the screw member 60 moving in the direction approaching the runner 33. In this case, the screw member 60 is linearly moved in the same direction. On the other hand, when the screw member 60 is rotated in the relaxation direction with respect to the screw hole 18, the screw member 60 is moved in a direction away from the runner 33 while being rotated. At this time, since the linear moving body 50 which is in contact with one end of the screw member 60 through the outward flange portion 53 is elastically biased in the direction of contact with the screw member 60 by the spring 70. , Linear movement in the direction of maintaining contact with the screw member (the same direction as the moving direction of the screw member 60). That is, by appropriately selecting the rotational direction and the amount of rotation of the screw member 60, the linear moving body 50 is adjusted by the appropriate amount linearly to adjust the cross-sectional area of the runner 33 as described above.

On the other hand, the sensor 80 for measuring at least one of the flow rate and the hydraulic pressure of the molten metal in the runner 33 in the position where one end (the end with the inclined surface 52) of the linear moving body 50 is disposed (for example, a flow rate sensor B) a hydraulic sensor). And a liquid crystal display element is provided as the display 81 which displays the value (flow velocity or oil pressure of a molten metal) measured by the said sensor 80. As shown in FIG. When the value measured by the sensor 80 is input to the control unit 85 such as a microprocessor, the control unit 85 outputs the value to the display 81 to be viewed by an operator through the display 81. To be able.

In the present embodiment, the second surface side end of the screw member 60 from the end of one end of the linear member 50 in a state where the other end of the linear member 50 is in contact with one end of the screw member 60. The length LT1 (refer FIG. 8) to the tip is made smaller than the length LT2 (refer FIG. 9) of the through-hole 16. FIG. In a state where the linear moving body does not change the cross-sectional area of the runner 33, for example, as shown in FIG. 9, one end (an end formed with an inclined surface) of the linear moving body 50 is formed on the first surface of the guide hole 17. When the linear moving body protrudes toward the runner through the opening surface of the guide hole, when the linear moving body is in a state coinciding with the opening surface of the side 13), the screw member 60 is connected to the second surface (through the screw hole 18). It is possible to maintain the state of being protected by being immersed in the screw hole 18 without protruding with respect to 14). Therefore, the screw member 60 is prevented from being rotated due to an unwanted external force during the handling process of the die casting mold or the mass production of the metal product by using the mold, whereby the linear moving body moves undesirably and is already adjusted. It is possible to effectively prevent the unwanted cross section of the runner from being changed again.

In addition, in the present embodiment, the vertical distance L1 (see FIG. 8) between the both ends of the inclined surface 52 in the depth direction D of the runner is in the longitudinal direction of the runner (ie, the flow direction of the melt; F). It is formed shorter than the vertical distance L3 between both ends of the inclined surface 52. Therefore, the inclined surface 52 maintains a relatively gentle inclination with respect to the flow direction F of the molten metal, and can further reduce the flow resistance while smoothly guiding the flow of the molten metal.

The vertical distance L1 between both ends of the inclined surface 52 in the depth direction D of the runner is larger than the depth L2 of the runner. Therefore, even when the linear moving body 50 protrudes from the guide hole 17 to the maximum (that is, the end of the linear moving body protrudes to a position where the bottom of the runner contacts the bottom part) as shown in FIG. In the movable body 50, the surface in contact with the molten metal flowing inside the runner 33 becomes the inclined surface 52. Therefore, when the molten metal flows in a state in which one end of the linear moving body 50 enters the runner in an appropriate amount (a state where the cross-sectional area of the runner is adjusted), all of the molten metal that comes into contact with the linear moving body 50 is inclined on the inclined surface of the linear moving body. Since it is guided in contact, it can flow smoothly and the flow resistance can be kept small.

In the design and manufacture of such a die-casting die 100, the cross-sectional area of the runner 33 is set slightly larger than the range expected in actual use. When the prototype is formed using the mold thus manufactured, one end of the linear moving body 50 is inserted into the runner 33 at a predetermined depth so that the cross-sectional area of the runner (that is, between the linear moving body and the bottom surface of the runner) is reduced. The prototype is molded with a certain amount of reduced flow area). Then, the state of the prototype is checked, and if a defect due to the gate speed occurs, such as the poor deposition or the poor casting, the position of the linear movable member 50 in the first direction is changed to the linear movable member. Change the entry depth to the runner. For example, when a casting defect occurs in the prototype, it is necessary to increase the ejection speed. In this case, the screw member 60 is rotated in one direction so that the linear moving body 50 enters the runner 33. Move it to the right amount. In this way, the cross-sectional area of the runner 33 in the portion where the linear moving body 50 is located is reduced, and as a result, the speed (ejection speed) of the molten metal passing through the reduced cross-sectional area and entering the cavity through the gate is reduced. Will be faster. If it is desired to reduce the ejection speed, the screw member may be appropriately rotated in the opposite direction. After adjusting the ejection speed as described above, the prototype is manufactured again to check the state of the prototype, and if necessary, the screw member 60 is rotated again to retract the linear moving body 50 from the runner or to the runner. Properly move a proper amount in the direction of entry and make a prototype.

By performing this process several times, if the desired blowing speed is realized (that is, the prototype is obtained in the desired state), the linear moving body 50 is kept in its position (the position implementing the desired blowing speed) ( That is, mass production operation | movement is performed, without rotating the screw member 60 anymore.

On the other hand, in the process of adjusting the cross-sectional area of the runner as described above, since the flow rate or hydraulic pressure by the cross-sectional area currently being adjusted is measured by the sensor 80 and displayed on the display 81, the operator melts every time the runner cross-sectional area is adjusted. The runner cross-sectional area adjustment operation can be performed while referring to the flow velocity and the hydraulic pressure of the, so that the adjustment operation can be performed more precisely and quickly.

As described above, in the case of the die-casting die of the present embodiment, the position of the linear member 50 is simply rotated by simply rotating the screw member 60 without cutting the mold or forming a weld in the mold and performing mold modification to cut the weld. By adjusting only, the desired blowing speed can be obtained, so that the cross-sectional area adjusting work (ie, the blowing speed adjusting work) of the runner can be easily performed. Furthermore, the cross-sectional area adjustment operation of the runner as described above can be performed by simply rotating the screw member in a state where the fixed mold is installed in the die casting molding machine without separating the fixed mold from the die casting molding machine. By doing this, the work for adjusting the blowing speed can be performed very easily, quickly and surely.

In addition, in order to adjust the cross-sectional area of the runner, the linear movable body 50 in contact with the molten metal flowing at a very high pressure is capable of linear movement only in the direction perpendicular to the flow direction of the runner. Since the linear movement is performed only when the screw screwed to the fixed mold is rotated, when the position of the linear moving body is changed by the flow of high pressure melt (the cross-sectional area of the runner is changed by the flow of high pressure melt). Will not occur). Therefore, with a simple configuration and low cost, it is possible to easily and quickly and accurately carry out the operation of adjusting the cross-sectional area of the runner and maintaining the adjusted cross-sectional area.

On the other hand, after the cross-sectional area adjustment of the runner is completed as described above, the mass production work for the actual mass production of metal products with the linear moving body or the screw member held at the position (not separated from the fixed mold or changed in position). When the mold is worn or the molding conditions are changed during the execution of the mold, it is necessary to adjust the ejection speed again. By rotating the screw member 60 again, the linear member 50 is moved in the desired direction to adjust the ejection speed. As it is possible, it is convenient.

Meanwhile, in the above-described embodiment, the linear movable body 50 is illustrated as being composed of one body, but as shown in FIGS. 11 and 12, the linear movable bodies 50 can be separated from each other by screws 59. It may be made to include two members that are coupled to each other, that is, the first member 510 and the second member 520.

Among the components shown in FIGS. 11 and 12, the components having the same configuration or function as the components in the embodiments illustrated in FIGS. 3 to 10 are given the same reference numerals, and for each of them. Detailed description will be omitted, and will be described in more detail with respect to the parts that are different from the embodiment shown in Figures 3 to 10 below.

The first member 510 is in contact with the molten metal in the runner 33, and the second member 520 is in contact with one end of the screw member 60. The first member 510 and the second member 520 have a square cross section of the same size. A rectangular groove 512 is formed in an end face of the first member 510 on the second member 520, and an end face of the second member 520 in the first member 510. A rectangular protrusion 522 is formed in the groove 512 of the first member 510. As the protrusion 522 of the second member is fitted into the groove 512 of the first member, relative rotation of the first member 510 with respect to the second member 520 is prevented. The first member 510 is provided with a female screw hole 515 which is engaged with the male screw portion 591 of the screw 59 on the same central axis as the first member 510. In addition, the second member 520, the male screw portion 591 of the screw 59 is passed through the head portion 592 is not passed through the male screw portion through hole 525, and the male screw portion through hole ( 525 is connected to the screw through hole 526 sized to pass the head 592 of the screw 59 is formed. The male threaded through hole 525 extends into the first member side end face of the second member 520, and the screw through hole 526 is the end face of the screw member 60 side of the second member 520. Open. The male threaded through hole 525 and the screwed through hole 526 are formed on the same central axis as the female screw hole 515 of the first member. Accordingly, the screw 59 may be fastened to the female screw hole 515 of the first member 510 by penetrating through the second member 520 from the screw member 60 side, and the screw 59 may be fastened by the screw 59. The first member 510 and the second member 520 are fixed relative to each other.

The first member 510 is formed of a material having higher heat resistance than the second member 520. For example, the second member 520 is formed of cast iron which is easy to process and inexpensive, and since the first member 510 is in contact with the molten metal at high temperature, the second member 520 has higher heat resistance than cast iron and has excellent high temperature characteristics. For example, it is formed by hot oral cavity such as SKD61.

On the other hand, the screw member 60 is formed with a through hole 65 passing through the screw member 60. The through hole 65 is provided to allow the screw 59 to pass from the second surface 14 side of the stationary mold 10 to the first member 510 side.

In this case, the first member passes through the screw member 60 from the second surface 14 side of the fixed mold 10 and the rectangular protrusion 522 fitted to the rectangular groove portion 512. By the screw 59 fastened to the female threaded hole 515 of the 510, the first member 510 and the second member 520 are fixed to each other in a state in which relative rotation is prevented, and a linear moving body integrated into one ( 50), and similarly to the linear moving body in the embodiment shown in FIGS. 3 to 10, by the rotation of the screw member 60, integrally straight in the direction entering the runner 33 and vice versa Will move.

Also in the case of the die casting mold which employs the linear moving body 50 including the first member 510 and the second member 520 as in the present embodiment, the embodiment shown in FIGS. 3 to 10, that is, one body It has the same effect as the die-casting die of the embodiment which employs the linear moving body. On the other hand, since the linear moving body in the present embodiment is composed of the first member 510 and the second member 520 detachably coupled to the first member 510, the portion that contacts the hot melt (that is, , Only the first member 510 is manufactured using a material having excellent heat resistance, and the portion in contact with the screw member 60 (that is, the second member 520) has a lower heat resistance than the first member 510, resulting in a high price. It is possible to fabricate using this inexpensive material. Therefore, the cost for forming the linear moving body can be reduced. In addition, when the mechanical performance is deteriorated due to contact with the hot melt during use, for example, when the linear moving body needs to be replaced, the first member 510, which is a part in contact with the molten metal, is released by loosening the screw 59. The first and second members 510 may be separated from the member 520, and the new first member 510 may be fitted to the second member 520 and may be fixed by the screw 59. As shown in FIGS. Compared to the case where the whole linear moving body has to be replaced due to the body, replacement cost or maintenance cost can be reduced.

On the other hand, when the male screw portion through hole 525 and the screw through hole 526 as described above are formed in the second member 520, the screw 59 is the second member 520 from the screw member 60 side. It can be fastened to the first member 510 by passing through), it is possible to fasten and relax the screw 59 even without removing the second member 520 from the fixed mold (10). Therefore, the coupling and separation operations of the first member 510 and the second member 520 can be easily performed.

In addition, if the through-hole 65 through which the screw 59 can pass through is formed in the screw member 60 as described above, the first screw member 60 can be removed without removing the screw member 60 from the stationary mold 10. Since the screw 59 for screwing the member 510 and the second member 520 can be fastened or relaxed, the first member 510 and the second member 520 can be combined and separated more easily. Can be done.

In the present embodiment, the screw 59 is used to detachably couple the first member 510 and the second member 520, but the screw 59 may be formed by a known coupling mechanism other than the screw (for example, a clamp mechanism). The first member 510 and the second member 520 may be coupled to each other.

Although not shown in detail, an end surface of the end of the screw member 60 (the end of the second surface side) may be provided with a groove portion into which a tool such as a wrench or a screwdriver is fitted in order to easily rotate the screw member. Alternatively, it may be formed by protruding the handle portion so that the operator can directly grip and rotate. In this case, the rotating operation of the screw member by the operator can be performed more easily.

10 ... Fixed mold 11 ... Mold inlet
16 ... Through-through 17-Guide
18.Screws 20.Movable molds
30 ... Space 31 ... Cavity
32 ... gate 33 ... runner
50 ... straight moving body 52 ... inclined surface
510 ... First member 512 groove
515 Female thread hole 520 Second member
522 ... projection 525 ... thread through hole
60.Thread member 61 ... Male thread
65 ... through hole 70 ... spring
80 ... sensor 81 ... display

Claims (2)

A fixed mold fixed to a die casting molding machine having a molten metal inlet and a movable mold coupled to the die casting molding machine so as to be in close contact with and spaced apart from the fixed mold,
In close contact between the stationary mold and the movable mold, a space portion is formed between the stationary mold and the movable mold.
The space portion connects the molten metal inlet and the gate such that the cavity, which is a molding space of a metal product, the gate connected to the cavity, and the molten metal supplied to the molten metal inlet are ejected into the cavity through the gate and filled in the cavity. In a die casting mold comprising a runner to be
The fixed mold has a through hole penetrating in a first direction perpendicular to the lengthwise direction of the runner from a first surface facing the movable mold to a second surface opposite to the first surface.
The through hole of the fixed mold comprises a guide hole having a non-circular cross section and opened to the first surface to communicate with the runner, and a screw hole communicating with the guide hole and opening to the second surface and having an internal thread formed on the inner circumferential surface thereof. Lose,
It is coupled to the guide hole of the fixed mold capable of linear movement in the first direction and rotation is impossible, and at one end thereof so as to change the cross-sectional area of the runner while adjusting the entry depth to the runner during linear movement. A linear moving body disposed in contact with the molten metal in the runner,
A male screw portion fastened to the female screw portion of the screw hole of the fixed mold, and one end portion is disposed to be in contact with the other end portion of the linear movable body, and the other end portion is exposed to the second surface side of the fixed mold through the screw hole. Screw member,
A spring for elastically biasing the linear member in a direction in which the other end of the linear member contacts the one end of the screw member;
A sensor for measuring at least one of a flow rate and a hydraulic pressure of the molten metal in the runner at a position where one end of the linear moving body is disposed;
A display for displaying a value measured by the sensor,
The linear movable member includes a first member which is a part in contact with the molten metal in the runner, and a second member which is detachably coupled to the first member by a screw and is in contact with one end of the screw member. ,
The first member is formed of a material having a higher heat resistance than the second member,
A rectangular groove is formed in the end face of the second member side of the first member, and a rectangular protrusion is fitted into the groove part of the first member in the end face of the first member side of the second member. Is formed so that the protrusion is fitted to the groove of the first member, thereby preventing relative rotation of the first member and the second member,
And said screw is fastened to said first member through said second member, said die casting mold having a linear mover for a runner cross-sectional area adjustment mechanism. delete

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