JP2016193447A - Mold spool core and casting mold provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold spool core which cools each area of a biscuit part and a runner part respectively substantially-equally.SOLUTION: A mold spool core 30 comprises a main body block 31 having a runner part 9 formed thereon which guides molten metal from a biscuit part 10 to a cavity part, and a separator 32 which is inserted to the main body block 31. Therein, the separator 32 includes an inflow channel 32b which causes cooling water to flow into the lower side of a first space S1 opposite to the biscuit part 10 and an outflow channel 32d which causes the cooling water guided from the first space S1 to a second space S2 of an upper part of the separator 32 to flow out. A first inclination angle θ1 for an axial line X of an outer circumferential surface 31a which forms the runner part 9 and a second inclination angle θ2 for an axial line X of an inner circumferential surface 31b of the main body block 31 which forms the second space S2 accord with each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mold shunt and a casting mold including the same.

2. Description of the Related Art Conventionally, there is known a die-casting mold that performs casting by filling a cavity formed between a fixed mold and a movable mold with a molten metal at a high pressure. The die casting mold is provided with a mold diverter for guiding the molten metal injected by the plunger tip to the cavity.
The mold divertor forms a biscuit portion between the plunger tip and a runner portion that guides the molten metal injected into the biscuit portion to the cavity portion.

  In die casting, a cooling period (clamping time) is provided after the cavity is filled with the molten metal, and the molten metal filled in the cavity is cooled and solidified before the product is taken out. Since the molten metal is filled in the cavity part, the runner part, and the biscuit part, it is necessary to solidify the molten metal filled in each part before taking out the product.

  As the cooling period (clamping time) is shorter, the number of products manufactured per unit time increases. However, if the product is removed from the mold with insufficient cooling, it is solidified by the metal solidified in the cavity and the runner. There is a possibility that a problem that the metal is divided and a problem that the molten metal of the biscuit part that is not solidified bursts.

In order to solve such problems, a mold shunt has been proposed in which cooling water is circulated inside to lower the surface temperature in order to promote cooling of the molten metal filled in the runner part and biscuit part. (For example, refer to Patent Document 1).
The mold shunt disclosed in Patent Document 1 is formed by forming a plurality of cooling holes in the body block of the mold shunt, and allowing cooling water to flow out from a cooling water supply pipe inserted into the cooling holes. The main body block of the mold diverter is cooled.

JP 2014-69206 A

The mold shunt disclosed in Patent Document 1 discharges the cooling water flowing out from the cooling water supply pipe through between the cooling hole and the outer peripheral surface of the cooling pipe. For this reason, a phenomenon in which turbulent flow occurs inside the cooling hole or a phenomenon in which cooling water stagnates in a part of the region is likely to occur.
In addition, since the front wall of the mold shunt facing the biscuit portion is partially cooled by the plurality of cooling holes, each region of the biscuit portion is not evenly cooled, resulting in a region that is difficult to cool.
Further, while the cooling hole extends along the central axis of the mold flow divider, the upper wall portion of the mold flow divider forming the runner portion is inclined with respect to the central axis. Therefore, it is not possible to cool each region along the runner portion evenly.

  The present invention has been made in view of the above points, and distributes a cooling medium inside without causing turbulent flow or stagnation, and substantially equally cools each region of the biscuit portion and the runner portion. It is an object of the present invention to provide a mold divertor that makes it possible and a casting mold having the same.

The present invention employs the following means in order to solve the above problems.
A mold diverter according to the present invention is a mold diverter that forms a biscuit portion between a plunger tip that moves along an axis and injects a molten metal, and has a substantially truncated cone shape along the axis. A runner portion having an outer peripheral surface and an inner peripheral surface formed on the outer peripheral surface and guiding a molten metal injected by the plunger tip from the biscuit portion to the cavity portion; And a cooling mechanism disposed in contact with the inner peripheral surface, and the biscuit portion between the distal end portion of the cooling mechanism and the inner peripheral surface of the main body portion. A first space is formed opposite to the cooling mechanism, and communicates with the first space between a groove formed at an upper portion of the cooling mechanism and the inner peripheral surface of the main body and faces the runner. axis A second space extending along the first space is formed, and the cooling mechanism is guided to the second space from the first space, and an inflow passage for allowing the cooling medium flowing from the outside to flow into the lower portion of the first space. An outflow passage for flowing out the cooling medium to the outside, and a first inclination angle of the outer peripheral surface forming the runner portion with respect to the axis and the inner peripheral surface of the main body portion forming the second space. The second tilt angle with respect to the axis coincides.

According to the mold shunt according to the aspect of the present invention, the first space facing the biscuit portion is formed between the tip portion of the cooling mechanism and the inner peripheral surface of the main body portion, and is formed at the upper portion of the cooling mechanism. A second space extending along the axis is formed between the groove portion and the inner peripheral surface of the main body portion so as to communicate with the first space and to face the runner portion.
The cooling medium that has flowed in from the outside flows into the lower portion of the first space by the inflow passage of the cooling mechanism, and is guided upward while cooling each region of the biscuit portion substantially evenly.

The cooling medium that has uniformly cooled each region of the biscuit part is guided to the second space communicating with the first space, passes through the second space, and flows out to the outside via the outflow channel.
Here, the 1st inclination angle with respect to the axis line of the outer peripheral surface which forms a runner part, and the 2nd inclination angle with respect to the axis line of the internal peripheral surface of the main-body part which form 2nd space correspond. Therefore, the radial thickness of the portion of the main body portion that cools the runner portion is constant along the axis along which the runner portion extends, and each region of the runner portion is cooled substantially uniformly by the cooling medium.

In addition, according to the mold shunt according to the aspect of the present invention, the cooling medium that has flowed into the lower portion of the first space from the outside via the inflow channel is guided from the upper portion of the first space to the second space. At the same time, it flows out through the outflow channel.
Therefore, the cooling medium can be circulated inside without generating turbulent flow or stagnation, as compared with a method in which the cooling medium is circulated inside the cooling hole using the cooling hole and the cooling water supply pipe.

  As described above, according to the mold diverter according to one aspect of the present invention, the cooling medium is circulated inside without causing turbulent flow or stagnation, and each region of the biscuit portion and the runner portion is cooled substantially equally. can do.

In the mold shunt according to the aspect of the present invention, the third inclination angle with respect to the axis of the groove of the cooling mechanism forming the second space is equal to the first inclination angle and the second inclination angle. It may be what you do.
By doing in this way, in each area | region of the 2nd space which cools the runner part of a main-body part, the distance of the groove part formed in the upper part of a cooling mechanism and the internal peripheral surface of a main-body part becomes fixed.
Therefore, the cooling medium passing through the second space flows at a substantially uniform flow velocity in each region along the axis of the second space, and each region along the axis of the runner portion is substantially uniformly cooled by the cooling medium.

In the mold shunt according to one aspect of the present invention, a distance between the groove portion of the cooling mechanism forming the second space and the inner peripheral surface of the main body portion is constant in a circumferential direction around the axis. May be.
By doing in this way, in each area | region of the circumferential direction of 2nd space which cools the runner part of a main-body part, the distance of the groove part formed in the upper part of a cooling mechanism and the internal peripheral surface of a main-body part becomes fixed.
Therefore, the cooling medium passing through the second space flows at a substantially uniform flow velocity in each circumferential region of the second space, and each circumferential region of the runner portion is cooled substantially uniformly by the cooling medium.

In the mold shunt according to one aspect of the present invention, a plurality of the groove portions are formed in the upper portion of the cooling mechanism at intervals in the circumferential direction around the axis, and the inner portions of the plurality of groove portions and the main body portion are formed. A plurality of the second spaces may be formed between the peripheral surface and the peripheral surface.
By doing in this way, compared with the case where a single 2nd space is formed by a single groove part, the deviation of the flow velocity of the cooling medium in each position of the peripheral direction of the 2nd space can be reduced.

In the mold shunt according to the aspect of the present invention, an outlet for allowing the cooling medium flowing out from the outflow channel to flow out is formed in the main body, and the outflow channel is formed in a circumferential direction around the axis. The cooling mechanism may be formed in an annular shape on the outer peripheral surface of the cooling mechanism, and may be a flow path communicating with the second space and the outlet.
By doing in this way, the cooling medium that has flowed into the second space from the first space can be guided to the outlet along the outflow channel formed on the outer peripheral surface of the cooling mechanism along the circumferential direction around the axis. .

In the mold shunt according to one aspect of the present invention, the first tilt angle and the second tilt angle may be set in a range of 3 ° to 15 °.
By doing in this way, while making the 1st inclination angle with respect to the axis line of the outer peripheral surface of the main-body part which forms a runner part into the angle (gradient) of the range of 3 degrees or more and 15 degrees or less suitable for die-cutting, Each region can be cooled substantially uniformly by the cooling medium.

A casting mold according to an aspect of the present invention includes the above-described mold diverter.
In this way, the mold shunt that allows the cooling medium to circulate inside without causing turbulence and stagnation, and that the respective regions of the biscuit portion and the runner portion can be cooled substantially uniformly. A casting mold can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, while the cooling medium is distribute | circulated inside without generating a turbulent flow and a stagnation, and each area | region of a biscuit part and a runner part can be cooled substantially equally, respectively, The casting mold provided with can be provided.

It is a longitudinal cross-sectional view which shows a die-cast metal mold | die provided with the metal mold | die diverter which concerns on 1st Embodiment. It is a longitudinal cross-sectional view of the mold shunt shown in FIG. It is a front view of the main body block shown in FIG. It is a front view of the separator shown in FIG. It is AA arrow sectional drawing of the metal mold | die dilator shown in FIG. FIG. 3 is a cross-sectional view of the mold diverter shown in FIG. It is sectional drawing of the metal mold | die dilator which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view of the metal mold | die dilator which concerns on 3rd Embodiment. It is CC sectional view taken on the line of the mold divertor shown in FIG.

[First Embodiment]
Hereinafter, a die casting die according to a first embodiment of the present invention will be described with reference to the drawings.
A die casting die 100 (casting die) of this embodiment shown in FIG. 1 is an apparatus for casting aluminum, zinc, or magnesium.

  As shown in FIG. 1, a die casting mold 100 according to the present embodiment includes a molten metal supply unit 1, a fixed mold 2, a movable mold 3, a fixed platen 4, a movable platen 5, and a fixed mold. A cavity 6, a movable mold cavity 7, an extrusion plate 15, an extrusion pin 16, and a chill vent 20 are provided. As a part of the movable mold cavity 7, a mold shunt 30 is provided.

  The molten metal supply unit 1 includes a plunger sleeve 12, a plunger tip 13, and a gate gate 14. The plunger sleeve 12 is a substantially cylindrical member fixed to the fixed platen 4. A hollow portion serving as a flow path for the molten metal is provided in the central portion of the plunger sleeve 12 in the axial direction. A high-temperature molten metal is injected from a molten metal supply port 21 provided above the plunger sleeve 12.

  The plunger tip 13 is a substantially columnar member that is fixed to an injection hydraulic cylinder (not shown) via a plunger rod 13 b and has an outer peripheral surface having an outer diameter that is substantially the same as the inner diameter of the plunger sleeve 12. The plunger tip 13 can be advanced and retracted from the position indicated by a two-dot chain line in 13 a of FIG. 1 along the inner peripheral surface 12 a of the plunger sleeve 12 to the inside of the gate sleeve 14.

The gate sleeve 14 is a substantially cylindrical member attached to the fixed mold 2. A mold diverter 30 is disposed at a position facing the gate gate 14. In the state shown in FIG. 1 in which the movable mold 3 is close to the fixed mold 2, a runner portion 9 is formed between the gate sleeve 14 and the mold diverter 30.
The plunger tip 13 can advance and retreat along the inner peripheral surface 14 a of the gate sleeve 14.

In the mold shunt 30, the cooling water supply pipe 18 for supplying cooling water (cooling medium) to the separator 32 (cooling mechanism) formed inside, and the cooling water supplied to the separator 32 are discharged. The cooling water return pipe 19 is connected. By cooling the inside of the mold diverter 30, the molten metal that passes through the runner portion 9 is cooled.
Further, the gate sleeve 14 is provided with a cooling water supply pipe 22 for supplying cooling water to a cooling hole (not shown) formed therein, and for discharging the cooling water supplied to the cooling hole (not shown). The cooling water return pipe 23 is connected.

In a state where the molten metal is injected into the bottom of the plunger sleeve 12, the plunger tip 13 is moved from the right side of the molten metal supply port 21 (the position indicated by a two-dot chain line indicated by reference numeral 13a) to the inside of the molten metal sleeve 14 (the position indicated by the solid line indicated by reference numeral 13). ). Thereby, the molten metal in the plunger sleeve 12 is guided to the cavity portion 8 and the chill vent 20 via the runner portion 9.
The biscuit part 10 shows the area | region which the mold shunt 30 forms between the plunger tip 13 in the state in which the plunger tip 13 was closest to the mold shunt 30.

The fixed mold 2 is a member fixed to the fixed platen 4. A recess 2a formed in the fixed mold 2 accommodates a fixed mold cavity 6 into which the molten metal is guided.
The movable mold 3 is a member fixed to the movable platen 5. A movable mold cavity 7 is accommodated in the recess 3 a formed in the movable mold 3. The movable mold 3 is positioned close to the fixed mold 2 shown in FIG. 1 and separated from the fixed mold 2 (not shown) by a drive mechanism (not shown) such as a hydraulic cylinder connected to the movable platen 5. ) And can be switched.

  A cavity 8 is formed between the movable mold 3 and the fixed mold 2 in a state where the movable mold 3 and the fixed mold 2 are close to each other (see FIG. 1). In the state shown in FIG. 1, the product corresponding to the shape of the cavity portion 8 is cast by introducing the molten metal into the cavity portion 8 and cooling it.

  The extrusion plate 15 is a plate-like member that is arranged inside the movable mold 3 and to which a plurality of extrusion pins 16 are connected. The extrusion plate 15 is pushed out in a direction in which a product cast by an extrusion mechanism (not shown) with the movable mold 3 being separated from the fixed mold 2 approaches the fixed mold 2. As a result, the end of the push pin 16 extrudes the product formed by the cavity 8, and the product is removed from the movable mold cavity 7.

The chill vent 20 is a metal member used for degassing the gas that is pushed out when the molten metal is guided to the cavity portion 8 to the outside of the die casting mold 100.
The chill vent 20 includes a fixed chill vent 20 a fixed to the fixed mold 2 and a movable chill vent 20 b fixed to the movable mold 3. The fixed chill vent 20a is provided with a suction port 20c.

  A pump (not shown) is connected to the suction port 20c. By performing suction by the pump, the gas in the cavity portion 8 is sucked and guided to the pump through a gap formed between the fixed chill vent 20a and the movable chill vent 20b.

Next, the structure of the mold flow divider 30 of this embodiment is demonstrated with reference to FIGS.
As shown in FIG. 2, the mold shunt 30 of the present embodiment includes a main body block 31 (main body portion) that forms the biscuit portion 10 between the plunger tip 13 and a separator inserted into the main body block 31. 32.

As shown in the front view of FIG. 3, the main body block 31 is a member having an outer peripheral surface 31 a and an inner peripheral surface 31 b that are formed in a substantially truncated cone shape along the axis X. As a member forming the main body block 31, hot tool steel such as SKD61 is preferably used.
On the outer peripheral surface 31 a at the upper part of the main body block 31, a runner portion 9 is formed that guides the molten metal injected by the plunger tip 13 moving along the axis X from the biscuit portion 10 to the cavity portion 8.

An inflow port 31c that is connected to the cooling water supply pipe 18 (see FIG. 1) and penetrates from the outer peripheral surface 31a toward the inner peripheral surface 31b is formed in the lower portion of the main body block 31.
In addition, an outlet 31d that is connected to the cooling water return pipe 19 (see FIG. 1) and penetrates from the outer peripheral surface 31a toward the inner peripheral surface 31b is formed in the lower part of the main body block 31.
The separator 32 is a member that is formed in a substantially truncated cone shape along the axis X and is disposed in contact with the inner peripheral surface 31 b of the main body block 31. As a member for forming the separator 32, stainless steel such as SUS303 is preferably used.

  As shown in the cross-sectional view of FIG. 2 and the front view of FIG. 4, the separator 32 has an inflow channel 32 b formed therein so as to be connected to an inflow port 31 c formed in the main body block 31. Further, the separator 32 has an outflow channel 32 d formed in an annular shape on the outer peripheral surface of the separator 32 along the circumferential direction around the axis X. Further, a groove portion 32 c extending along the axis X is formed on the upper portion of the separator 32.

As shown in FIGS. 2 and 4, an endless annular groove 32 e and an annular groove 32 f extending around the axis X are formed on the outer peripheral surface on the rear end side of the separator 32.
An O-ring 32g is disposed in the annular groove 32e. When the O-ring 32g disposed in the annular groove 32e and the inner peripheral surface 31b of the main body block 31 are in contact with each other, a seal region that prevents leakage of cooling water is formed over the entire circumference around the axis X.

Similarly, an O-ring 32h is disposed in the annular groove 32f. The O-ring 32h arranged in the annular groove 32f and the inner peripheral surface 31b of the main body block 31 come into contact with each other, so that a seal region that prevents leakage of cooling water is formed over the entire circumference around the axis X.
This sealing region is formed between the inlet 31c and the outlet 31d. Therefore, it is possible to prevent the cooling water flowing from the inflow port 31c from being directly led to the outflow port 31d without being led to the inflow channel 32b of the separator 32.

  As shown in FIG. 2, a first space S <b> 1 having a substantially circular cross section perpendicular to the axis X is formed between the tip 32 a of the separator 32 and the inner peripheral surface 31 b of the main body block 31 facing the tip 32 a. Is formed. The first space S1 is a space that is disposed so as to face the biscuit portion 10 and in which cooling water flows.

As shown in FIG. 2, a second space S <b> 2 extending along the axis X is formed between the groove portion 32 c of the separator 32 and the inner peripheral surface 31 b of the main body block 31 so as to face the runner portion 9.
As shown in FIG. 2, the first space S1 and the second space S2 are in communication with each other above the first space S1.

  The inflow passage 32b included in the separator 32 allows the cooling water that has flowed in from the cooling water supply pipe 18 (outside) through the inflow port 31c to flow downward in the first space S1. The cooling water that has flowed downward from the first space S1 is guided upward from the first space S1 and flows into the second space S2. The cooling water that has flowed into the second space S2 is guided from the front end side (biscuit portion 10 side) of the mold flow divider 30 toward the rear end side, and flows into the outflow channel 32d.

  As shown in FIG. 5 (AA arrow cross-sectional view in FIG. 2), the outflow channel 32 d is formed in an annular shape along the circumferential direction around the axis X. The outflow passage 32d guides the cooling water guided from the first space S1 to the second space S2 to the outflow port 31d along the direction indicated by the arrow in FIG.

As shown in FIG. 2, the inclination angle with respect to the axis Y of the outer peripheral surface 31a forming the runner portion 9 is the first inclination angle θ1. By inclining the axis Y by the first inclination angle θ1, it is possible to prevent the product from being damaged when the product is taken out from the movable mold cavity 7.
The inclination angle of the inner peripheral surface 31b of the main body block 31 forming the second space S2 with respect to the axis Z is the second inclination angle θ2. The inclination angle of the groove 32c of the separator 32 forming the second space S2 with respect to the axis Z is the third inclination angle θ3.

Here, the axis Y and the axis Z are parallel to the axis X which is the central axis of the mold flow divider 30 and the plunger tip 13.
Accordingly, the first inclination angle θ1 indicates the inclination angle with respect to the axis X of the outer peripheral surface 31a, the second inclination angle θ2 indicates the inclination angle with respect to the axis X of the inner peripheral surface 31b, and the third inclination angle θ3 indicates the axis X of the groove 32c. The inclination angle with respect to is shown.

The first tilt angle θ1, the second tilt angle θ2, and the third tilt angle θ3 are the same and the same angle. Specifically, the same angle is preferably set in the range of 3 ° or more and 15 ° or less.
By making the first inclination angle θ1 and the second inclination angle θ2 coincide with each other, the thickness in the radial direction (direction perpendicular to the axis X) of the portion of the main body block 31 that cools the runner portion 9 is the axis along which the runner portion 9 extends. Constant along X (distance D1 shown in FIG. 2).

  Further, by matching the second inclination angle θ2 and the third inclination angle θ3, in each region of the second space S2 for cooling the runner portion 9 of the main body block 31, the groove portion 32c formed on the upper portion of the separator 32 and the main body The distance from the inner peripheral surface 31b of the block 31 is constant (distance D2 shown in FIG. 2).

Further, as shown in FIG. 6 (a cross-sectional view taken along the line B-B in FIG. 2), the distance between the groove 32c of the separator 32 forming the second space S2 and the inner peripheral surface 31b of the main body block 31 is about the axis X. Is constant in the circumferential direction (distance D2 shown in FIG. 6).
By doing in this way, in each area | region of the circumferential direction of 2nd space S2 which cools the runner part 9 of the main body block 31, between the groove part 32c formed in the upper part of the separator 32, and the internal peripheral surface 31b of the main body block 31 The distance D2 is constant.

The operation and effect of the mold flow divider 30 of the present embodiment described above will be described.
According to the mold flow divider 30 of the present embodiment, the first space S <b> 1 facing the biscuit portion 10 is formed between the tip end portion 32 a of the separator 32 and the inner peripheral surface 31 b of the main body block 31. In addition, a second space extending along the axis X so as to communicate with the first space S1 and to face the runner portion 9 between the groove portion 32c formed in the upper portion of the separator 32 and the inner peripheral surface 31b of the main body block 31. S2 is formed.
The cooling water that has flowed in from the cooling water supply pipe 18 flows into the lower part of the first space S1 through the inflow channel 32b of the separator 32, and is guided upward while cooling each region of the biscuit part 10 substantially equally.

The cooling water that has uniformly cooled each region of the biscuits 10 is guided to the second space S2 that communicates with the first space S1, passes through the second space S2, and passes through the outflow passage 32d to return the cooling water. To 23.
Here, the first inclination angle θ1 with respect to the axis X of the outer peripheral surface 31a that forms the runner portion 9 matches the second inclination angle θ2 with respect to the axis X of the inner peripheral surface 31b of the main body block that forms the second space S2. Yes. Therefore, the radial thickness of the portion of the main body block 31 that cools the runner portion 9 is constant (distance D1 shown in FIG. 2) along the axis X along which the runner portion 9 extends, and each region of the runner portion 9 is cooled. Cooled almost uniformly by water.

Further, according to the mold diverter 30 of the present embodiment, the cooling water that has flowed into the lower portion of the first space S1 from the cooling water supply pipe 18 via the inflow channel 32b is changed from the upper portion of the first space S1 to the second portion. It is guided to the second space S2 and flows out to the cooling water return pipe 19 via the outflow passage 32d.
Therefore, compared with the conventional system which distribute | circulates a cooling water inside a cooling hole using a cooling hole and a cooling water supply pipe, a cooling water can be distribute | circulated inside, without generating a turbulent flow or a stagnation.

  As described above, according to the mold diverter 30 of the present embodiment, the cooling water is circulated inside without causing turbulent flow or stagnation, and each region of the biscuit portion 10 and the runner portion 9 is cooled substantially equally. can do.

In the mold shunt 30 of the present embodiment, the third inclination angle θ3 with respect to the axis X of the groove 32c of the separator 32 that forms the second space S2 matches the first inclination angle θ1 and the second inclination angle θ2. ing.
By doing in this way, in each area | region of 2nd space S2 which cools the runner part 9 of the main body block 31, the distance of the groove part 32c formed in the upper part of the separator 32 and the internal peripheral surface 31b of the main body block 31 is constant. (Distance D2 shown in FIG. 2).
Therefore, the cooling water passing through the second space S2 flows at a substantially uniform flow rate in each region along the axis X of the second space S2, and each region along the axis X of the runner portion 9 is substantially even by the cooling water. To be cooled.

In the mold diverter 30 of the present embodiment, as shown in FIG. 6, the distance D2 between the groove 32c of the separator 32 forming the second space S2 and the inner peripheral surface 31b of the main body block 31 is about the axis X. Constant in the circumferential direction.
By doing in this way, in each area | region of the circumferential direction of 2nd space S2 which cools the runner part 9 of the main body block 31, between the groove part 32c formed in the upper part of the separator 32, and the internal peripheral surface 31b of the main body block 31 The distance D2 is constant.
Therefore, the cooling water passing through the second space S2 flows at a substantially uniform flow rate in each circumferential region of the second space S2, and each circumferential region of the runner portion 9 is cooled substantially uniformly by the cooling water. .

In the mold diverter 30 of the present embodiment, an outlet 31 d for allowing the cooling water flowing out from the outflow passage 32 d to flow out to the cooling water return pipe 19 is formed in the main body block 31. The outflow channel 32d is a channel that is formed in an annular shape on the outer peripheral surface of the separator 32 along the circumferential direction around the axis X and communicates with the second space S2 and the outflow port 31d.
In this way, the cooling water that has flowed into the second space S2 from the first space S1 flows into the outlet 31d along the outflow passage 32d formed on the outer peripheral surface of the separator 32 along the circumferential direction around the axis X. Can lead to.

[Second Embodiment]
Next, a die casting die according to a second embodiment of the present invention will be described with reference to FIG.
Note that the second embodiment is a modification of the first embodiment, and is the same as the first embodiment except for the case described below, and the description below is omitted.

In the die casting mold according to the first embodiment, a single groove 32c is formed in the separator 32, and a single second space S2 is formed between the groove 32c and the inner peripheral surface 31b of the main body block 31. A mold shunt 30 was provided.
On the other hand, in the die casting mold of this embodiment, a plurality of groove portions 32c are formed in the separator 32, and a plurality of second spaces S2 are formed between the plurality of groove portions 32c and the inner peripheral surface 31b of the main body block 31. The mold diverter 30 ′ is provided.

  FIG. 7 is a cross-sectional view of the mold shunt 30 ′ according to the second embodiment, and shows a cross-sectional view at the same position as the cross-sectional view taken along the line BB of the mold shunt 30 according to the first embodiment. Is.

The mold shunt 30 ′ of the present embodiment is longer in the circumferential direction around the axis X of the runner portion 9 than the mold shunt 30 of the first embodiment. In this case, if the single groove part 32c is formed in the separator 32 so that the whole area | region of the circumferential direction of the runner part 9 can be cooled, the length of the circumferential direction of the single 2nd space S2 will become long.
Then, the flow rate of the cooling water is biased in each circumferential region of the single second space S2, and the runner portion 9 cannot be cooled substantially uniformly in the circumferential direction.

  Therefore, in the present embodiment, as shown in FIG. 7, the mold shunt 30 ′ of the present embodiment forms three groove portions 32 c at an upper portion of the separator 32 at intervals in the circumferential direction around the axis X. I made it. Three second spaces S <b> 2 are formed between the three grooves 32 c and the inner peripheral surface 31 b of the main body block 31.

  By doing in this way, compared with the case where the single 2nd space S2 is formed by the single groove part 32c, the deviation of the flow velocity of the cooling water in each position of the circumferential direction of the 2nd space S2 can be reduced. .

[Third Embodiment]
Next, a die casting die according to a third embodiment of the present invention will be described with reference to FIGS.
Note that the third embodiment is a modification of the second embodiment, and is the same as the second embodiment unless otherwise described below, and the description thereof will be omitted.

The die casting mold according to the second embodiment forms an inflow channel 32b so as to communicate with an inflow port 31c formed in the main body block 31, and communicates with an outflow port 31d formed in the main body block 31. An annular outflow channel 32d was formed.
On the other hand, in the die casting mold according to the present embodiment, the inlet 31c and the outlet 31d are not formed in the main body block 31, and the inflow channel 32b and the outflow channel 32i that extend along the axis X are formed in the separator 32, respectively. To form.

  As shown in the longitudinal sectional view of FIG. 8, the separator 32 included in the mold diverter 30 ″ of the present embodiment is formed inside along the axis X so as to be connected to a cooling water supply pipe (not shown). And an outflow channel 32i formed inside along the axis X so as to be connected to a cooling water return pipe (not shown).

  The inflow channel 32b allows the cooling water flowing along the axis X to flow into the lower portion of the first space S1. As shown in FIG. 9 (cross-sectional view taken along the line CC in FIG. 8), the first space S1 passes through the three second spaces S2 corresponding to the three groove portions 32c to the annular outflow channel 32d. The cooling water that has flowed out is guided to the outflow passage 32i from three locations around the axis X, and is discharged from the outflow passage 32i to the cooling water return pipe (not shown).

  As shown in FIGS. 8 and 9, a cooling piece 32j formed in a semi-annular shape is disposed in the lower half of the annular outflow channel 32d. The cooling piece 32j is a member for preventing the cooling water flowing into the outflow passage 32d from the three grooves 32c from staying in the lower half of the outflow passage 32d.

  In the mold shunt 30 ″ of the present embodiment, the cooling water supply pipe (not shown) and the cooling water return pipe (not shown) are on the movable platen 5 side (FIG. 1) from the die casting mold 100 shown in FIG. (In this case, the flow is connected to the inlet port connected to the cooling water supply pipe and the cooling water return pipe to the main body block 31 of the mold diverter 30 "). The cooling water can be circulated by the inflow channel 32b and the outflow channel 32i formed in the separator 32 without forming an outlet.

[Other Embodiments]
In the above description, the cooling water is used as a cooling medium for cooling the mold diverter. However, other modes may be used. For example, other cooling media such as liquid or gas other than water may be used.

  In the above description, the example in which the mold diverter is used for the die casting mold 100 used for die casting is described, but other modes may be used. For example, the present invention may be applied to a casting mold used in casting other than die casting such as gravity casting or low pressure casting.

DESCRIPTION OF SYMBOLS 1 Molten metal supply part 2 Fixed metal mold 3 Movable metal mold 8 Cavity part 9 Runner part 10 Biscuit part 12 Plunger sleeve 13 Plunger tip 14 Pouring sleeve 18 Cooling water supply piping 19 Cooling water return piping 21 Molten metal feeding port 22 Cooling water supply piping 23 Cooling water return pipe 30, 30 ′, 30 ″ Mold shunt 31 Body block
31a Outer peripheral surface 31b Inner peripheral surface 31c Inlet 31d Outlet 32 Separator (cooling mechanism)
32a Tip portion 32b Inflow channel 32c Groove portion 32d Outflow channel 32e, 32f Annular grooves 32g, 32h O-ring 32i Outflow channel 32j Cooling piece 100 Die casting mold (casting mold)
S1 first space S2 second space X, Y, Z axis θ1 first inclination angle θ2 second inclination angle θ3 third inclination angle

The present invention employs the following means in order to solve the above problems.
A mold diverter according to the present invention is a mold diverter that forms a biscuit portion between a plunger tip that moves along a central axis and injects a molten metal, and has a substantially conical shape along the central axis. A body portion having an outer peripheral surface and an inner peripheral surface formed in a trapezoidal shape and a runner portion for guiding the molten metal injected by the plunger tip from the biscuit portion to the cavity portion is formed on the outer peripheral surface at the upper portion, and the center A cooling mechanism formed in a substantially truncated cone shape along the axis and in contact with the inner peripheral surface, and between the tip of the cooling mechanism and the inner peripheral surface of the body portion A first space facing the biscuit portion and having a substantially circular cross section perpendicular to the central axis is formed , and the first space is formed between a groove portion formed in an upper portion of the cooling mechanism and the inner peripheral surface of the main body portion. One sky A second space extending along the central axis so as to face the runner portion communicated with is formed, the cooling mechanism, the central axis of the cooling medium flowing from the outside to a lower portion of said first space The outer peripheral surface that has an inflow channel that flows into a region below and an outflow channel that flows out the cooling medium guided from the first space to the second space to the outside, and forms the runner portion wherein a second inclined angle with respect to the central axis of the inner peripheral surface of the main body portion where the first inclination angle to form the second space with respect to the central axis is matched.

In the mold shunt according to the aspect of the present invention, the third inclination angle with respect to the central axis of the groove portion of the cooling mechanism forming the second space is the first inclination angle and the second inclination angle. It may match.
By doing in this way, in each area | region of the 2nd space which cools the runner part of a main-body part, the distance of the groove part formed in the upper part of a cooling mechanism and the internal peripheral surface of a main-body part becomes fixed.
Therefore, the cooling medium passing through the second space flows at a substantially uniform flow velocity in each region along the central axis of the second space, and each region along the central axis of the runner portion is substantially uniformly cooled by the cooling medium. The

In the mold shunt according to the aspect of the present invention, a distance between the groove portion of the cooling mechanism that forms the second space and the inner peripheral surface of the main body portion is constant in a circumferential direction around the central axis. There may be.
By doing in this way, in each area | region of the circumferential direction of 2nd space which cools the runner part of a main-body part, the distance of the groove part formed in the upper part of a cooling mechanism and the internal peripheral surface of a main-body part becomes fixed.
Therefore, the cooling medium passing through the second space flows at a substantially uniform flow velocity in each circumferential region of the second space, and each circumferential region of the runner portion is cooled substantially uniformly by the cooling medium.

In the mold shunt according to an aspect of the present invention, a plurality of the groove portions are formed in the upper portion of the cooling mechanism at intervals in the circumferential direction around the central axis, and the plurality of groove portions and the main body portion A plurality of the second spaces may be formed between the inner peripheral surface and the inner peripheral surface.
By doing in this way, compared with the case where a single 2nd space is formed by a single groove part, the deviation of the flow velocity of the cooling medium in each position of the peripheral direction of the 2nd space can be reduced.

In the mold shunt according to one aspect of the present invention, an outlet for allowing the cooling medium flowing out from the outflow channel to flow out is formed in the main body, and the outflow channel has a circumference around the central axis. A channel may be formed in an annular shape on the outer peripheral surface of the cooling mechanism along the direction and communicated with the second space and the outlet.
In this way, the cooling medium flowing into the second space from the first space can be guided to the outlet along the outflow channel formed on the outer peripheral surface of the cooling mechanism along the circumferential direction around the central axis. it can.

Claims (7)

A mold diverter that forms a biscuit portion between a plunger tip that moves along an axis and injects molten metal,
A runner portion having an outer peripheral surface and an inner peripheral surface each formed substantially in a truncated cone shape along the axis and leading the molten metal injected by the plunger tip from the biscuit portion to the cavity portion is formed on the upper outer peripheral surface. The body part made,
A cooling mechanism formed in a substantially truncated cone shape along the axis and disposed in contact with the inner peripheral surface,
A first space facing the biscuit portion is formed between a tip portion of the cooling mechanism and the inner peripheral surface of the main body portion,
A second space is formed between the groove formed in the upper portion of the cooling mechanism and the inner peripheral surface of the main body so as to communicate with the first space and extend along the axis so as to face the runner. And
The cooling mechanism includes an inflow channel for allowing a cooling medium flowing in from outside to flow downward in the first space, and an outflow channel for flowing out the cooling medium guided from the first space to the second space to the outside. Have
A mold diversion in which a first inclination angle of the outer peripheral surface forming the runner portion with respect to the axis and a second inclination angle of the inner peripheral surface of the body portion forming the second space with respect to the axis are the same. Child.   2. The mold flow diverter according to claim 1, wherein a third inclination angle with respect to the axis of the groove portion of the cooling mechanism forming the second space coincides with the first inclination angle and the second inclination angle.   The mold diversion according to claim 1 or 2, wherein a distance between the groove portion of the cooling mechanism that forms the second space and the inner peripheral surface of the main body portion is constant in a circumferential direction around the axis. Child. A plurality of the groove portions are formed at intervals in the circumferential direction around the axis at the top of the cooling mechanism,
4. The mold flow diverter according to claim 1, wherein a plurality of the second spaces are formed between the plurality of grooves and the inner peripheral surface of the main body. 5. An outlet for allowing the cooling medium flowing out from the outflow channel to flow out is formed in the main body,
5. The outflow channel is a channel formed in an annular shape on the outer peripheral surface of the cooling mechanism along a circumferential direction around the axis and communicating with the second space and the outflow port. The mold shunt according to any one of the above.   The mold shunt according to any one of claims 1 to 5, wherein the first tilt angle and the second tilt angle are set in a range of 3 ° or more and 15 ° or less.   A casting mold comprising the mold diverter according to any one of claims 1 to 6.

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