JP7198316B1 - Die casting mold parts and method for manufacturing die casting mold parts - Google Patents

Abstract

Kind Code: A1 A heat check is prevented, rust is suppressed inside a water pipe, and deposits such as impurities contained in water are suppressed. A water pipe 13 having a flat hole bottom of a bent portion 13R is provided inside a die casting mold part 10A by a drill, and the inner surface of the water pipe 13 is divided into two along the extension axis of the water pipe 13. is subjected to rust prevention and deposit adhesion prevention processing, and the two divided members (11, 12) are integrated by metal bonding. [Selection drawing] Fig. 6

Description

The present invention relates to a die casting mold part and a method for manufacturing a die casting mold part.

A temperature control system consisting of a cooling pipe, etc. for adjusting the temperature of the movable side insert, which is attached to the fixed side insert so that it can move back and forth, and the movable side insert, which is attached to move back and forth in the same direction as the movable side insert. A mold component provided with means is known (see Patent Document 1, for example).

Generally, in die casting mold parts, in order to speed up the cooling of the molded product, a water pipe is arranged in the mold part that contacts the heat storage part of the molded product to speed up the molding cycle.
For this reason, the water pipes of general die-casting mold parts are designed so that straight holes are provided from multiple directions with a drill or the like so as to cool the locations that require cooling.
Also, water is often used for cooling, and a chiller is used to circulate the inside of the die casting mold part.

JP 2005-219445 A

However, in die-casting mold parts in which water pipes are formed by drilling straight holes from multiple directions, repeated heating and cooling may cause heat checks to occur toward sharp points at the tip of the drilled holes. I had a problem with the height.
Also, after the production of the molded product is finished, the cooling water is drained from the die casting mold part, and the water in the water pipe is removed.
However, there is a problem that the water in the water pipe cannot be completely removed, and the water remains partially, which causes rust.

In addition, if the rust is severe, it may block part or all of the water pipe, and there have been cases where this die-cast mold part cannot be used thereafter.
Furthermore, impurities contained in the water also accumulate in the water pipes, causing rust and clogging of the water pipes.
On the other hand, in the case of light rust and deposits of impurities, it is possible to remove deposits such as rust and impurities by using a dedicated removal device.

Therefore, the present invention has been made in view of the above-mentioned problems, and prevents water leakage from the water pipe due to heat check, suppresses the generation of rust inside the water pipe, and accumulates impurities contained in water. It is an object of the present invention to provide a die-casting die part and a method for manufacturing the die-casting die part that suppress the generation of objects.

Mode 1: One or more embodiments of the present invention comprises a water pipe internally drilled to flatten the bottom of the bend, deepen the blind hole, and flatten the tip, It is characterized in that it is divided into two along the extension axis of the water pipe, the inner surface of the water pipe is subjected to rust prevention and sediment adhesion prevention processing, and the two divided members are integrated by metal bonding. We are proposing die-cast mold parts that

The water pipe provided inside the die-cast mold part is drilled to flatten the bottom of the bent portion, deepen the blind hole, and flatten the tip.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is flattened by electrical discharge machining or the like.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
In addition, by deepening the blind hole and processing the tip flat by electrical discharge machining, etc., it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the tip of the drill hole during drilling. can.
Also, the water tube provided inside the die casting mold part is divided into two along the extension axis.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Also, the two divided members are integrated by metal bonding.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Moreover, the water pipe is formed by drilling, for example.
Therefore, the water tube can be formed inside the die casting mold part by a simple construction method.
The inner surface of the water pipe formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part of the present embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spraying.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 2: One or more embodiments of the present invention comprises a water pipe internally drilled to form a spherical hole bottom at a bend, deepen a blind hole, and have a spherical tip end, The water pipe is divided into two along the extension axis, the inner surface of the water pipe is subjected to rust prevention and sediment adhesion prevention processing, and the two divided members are integrated by metal bonding. We are proposing a die-cast mold part that

The water pipe provided inside the die-cast mold part is drilled so that the bottom of the bent portion is spherical, the blind hole is deepened, and the tip is spherical.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is processed into a spherical shape by electric discharge machining or the like.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
In addition, by deepening the blind hole and processing the tip into a spherical shape by electric discharge machining, etc., it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the tip of the drill hole during drilling. can.
Also, the water tube provided inside the die casting mold part is divided into two along the extension axis.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Also, the two divided members are integrated by metal bonding.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Moreover, the water pipe is formed by drilling, for example.
Therefore, the water tube can be formed inside the die casting mold part by a simple construction method.
The inner surface of the water pipe formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part of this embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spray film treatment.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 3: In one or more embodiments of the present invention, at least the outside of the bent portion is rounded by grooving, the blind hole is deepened by drilling, and the tip is rounded. The water pipe is divided into two along the extension axis, the inner surface of the water pipe is subjected to rust prevention and sediment adhesion prevention processing, and the two divided members are integrated by metal bonding. We are proposing a die casting mold part characterized by

The water pipe provided inside the die-casting mold part is rounded at least on the outer side of the bent portion by grooving, and the blind hole is deepened by drilling, and the tip is rounded.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, at least the outside of the bent portion is rounded by grooving.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the bent portion during grooving.
In addition, by deepening the blind hole and processing the tip into a radius by electric discharge machining or the like, it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the tip of the drill hole during drilling. can.
Also, the water tube provided inside the die casting mold part is divided into two along the extension axis.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Also, the two divided members are integrated by metal bonding.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Also, the water pipes are formed by, for example, grooving.
Therefore, the water tube can be formed inside the die casting mold part by a simple construction method.
In addition, the inner surface of the water pipe formed by grooving can suppress the surface roughness compared to drilling. there's a possibility that.
However, in the die-cast mold part of this embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spray film treatment.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 4: One or more embodiments of the present invention proposes a die-cast mold part, wherein the rust-prevention and deposition-prevention processing is plating.

Rust prevention and deposit adhesion prevention processing are performed, for example, by plating.
That is, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and plating is applied to counteract this surface roughness.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 5: One or more embodiments of the present invention propose a die-cast mold part, wherein the anti-corrosion/adhesion-prevention treatment is a coating treatment.

The rust prevention/deposit adhesion prevention processing is performed, for example, by a coating treatment.
That is, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and the surface roughness is treated with a coating process.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 6: One or more embodiments of the present invention propose a die-cast mold part characterized in that the anticorrosion/deposit adhesion prevention treatment is a thermal spray film treatment.

Rust prevention and deposit adhesion prevention processing are performed, for example, by thermal spray film processing.
In other words, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and the thermal spray film treatment is applied to this surface roughness.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 7: One or more embodiments of the present invention propose a die casting mold part, wherein the metal bonding is diffusion bonding.

Metal bonding is performed by, for example, a diffusion bonding method.
Diffusion bonding has the advantage that one metal bonding process can be performed in a short time and the bonding strength is close to 100%.
Therefore, it is a suitable method for metal joining of die-cast mold parts that require strength.

Mode 8: One or more embodiments of the present invention include drilling into the interior of the die casting mold part to flatten the bottom of the bend and drill the blind holes to deepen and flatten the tip. A water pipe forming step of forming a processed water pipe, a dividing step of dividing the die casting mold part into two along the extension axis of the water pipe, and a rust prevention and deposit prevention on the inner surface of the water pipe divided into two. A processing step in which processing is performed, and a bonding step in which the inner surface of the water pipe divided into two parts integrates the two-divided die-cast mold parts that have been processed to prevent rust and adherence of deposits by metal bonding. and a method for manufacturing a die-cast mold part.

In the water tube forming step, the water tube provided inside the die-cast mold part is drilled to flatten the bottom of the bent portion, deepen the blind hole, and flatten the tip.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is flattened by electrical discharge machining or the like.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
In addition, by deepening the blind hole by drilling and flattening the tip by electric discharge machining, etc., it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the drill hole tip during drilling. can do.
Also, in the dividing step, the water tube provided inside the die casting mold part is divided into two along its extension axis.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Further, in the processing step, the inner surface of the water pipe divided into two parts is subjected to rust prevention and sediment adhesion prevention processing.
That is, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and plating or coating is applied to deal with this surface roughness.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Also, in the bonding step, for example, metal bonding is performed by a diffusion bonding method.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Moreover, the water pipe is formed by drilling, for example.
Therefore, the water tube can be formed inside the die casting mold part by a simple construction method.
The inner surface of the water pipe formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part of the present embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spraying.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 9: One or more embodiments of the present invention include drilling into the die casting mold part with a spherical bottom at the bend and drilling a deep blind hole with a spherical tip. A water pipe forming step of forming a processed water pipe, a dividing step of dividing the die casting mold part into two along the extension axis of the water pipe, and a rust prevention and deposit prevention on the inner surface of the water pipe divided into two. A processing step in which processing is performed, and a bonding step in which the inner surface of the water pipe divided into two parts integrates the two-divided die-cast mold parts that have been processed to prevent rust and adherence of deposits by metal bonding. and a method for manufacturing a die-cast mold part.

In the water tube forming step, a drill is used inside the die-cast mold part to make the bottom of the bent portion spherical, the blind hole deepened, and the tip portion spherical.
The water pipe provided inside the die-casting mold part has a hole bottom of a bent portion formed into a spherical shape by drilling.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is processed into a spherical shape by electrical discharge machining.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
In addition, by deepening the blind hole by drilling and processing the tip into a spherical shape by electric discharge machining, etc., it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the drill hole tip during drilling. can do.
In the splitting step, the water tube formed in the water tube forming step is split into two along the extension axis of the water tube.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
In the processing process, the inner surface of the water tube divided into two is subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spraying.
That is, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and plating or coating is applied to deal with this surface roughness.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
In the bonding step, for example, metal bonding is performed by diffusion bonding.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Moreover, since the water pipe is formed by, for example, drilling, the water pipe can be formed inside the die-cast mold component by a simple construction method.
The inner surface of the water pipe formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part of this embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spray film treatment.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

Mode 10: In one or more embodiments of the present invention, the inside of the die casting mold part is rounded at least on the outer side of the bend by grooving, and the blind hole is deepened by drilling, and the tip is rounded. a water tube forming step of forming a water tube that is shaped like a water tube; a splitting step of splitting the die casting mold part into two along the extension axis of the water tube; and a joining step in which the inner surface of the two-divided water pipe is integrated by metal joining the two-divided die-cast mold parts that have been processed to prevent rust and adherence of deposits in the processing step. A method for manufacturing a die casting mold part is proposed, which is characterized by comprising:

In the water tube forming step, at least the outer side of the bent portion is rounded by grooving inside the die casting mold part.
In other words, the heat check occurs from the external surface that is in direct contact with molten aluminum used for die casting, and the crack tends to extend toward the sharp outer portion of the bent portion.
Therefore, in order to suppress the above phenomenon, specifically, at least the outer side of the bent portion is rounded by, for example, grooving.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion on the outside of the bent portion during drilling.
In addition, by deepening the blind hole by drilling and rounding the tip by electric discharge machining, etc., it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the tip of the drilled hole during drilling. can do.
In the splitting step, the water tube formed in the water tube forming step is split into two along the extension axis of the water tube.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
In the processing process, the inner surface of the water tube divided into two is subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spraying.
That is, the inner surface of the water tube formed by drilling, grooving, or the like is accompanied by surface roughness, and plating or coating is applied to deal with this surface roughness.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
In the bonding step, for example, metal bonding is performed by diffusion bonding.
Therefore, it is possible to produce a die-cast mold part in which a water pipe is formed inside which is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spraying film treatment.
As a result, it is possible to obtain a die-cast mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.
Moreover, since the water pipe is formed by, for example, drilling, the water pipe can be formed inside the die-cast mold component by a simple construction method.
The inner surface of the water pipe formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part of this embodiment, the water pipes formed inside are subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spray film treatment.
Therefore, it is possible to obtain a die casting mold part that suppresses the generation of rust inside the water pipe and suppresses the generation of deposits such as impurities contained in water.

According to one or more embodiments of the present invention, it is possible to prevent water leakage from the water pipe due to heat check, suppress the generation of rust inside the water pipe, and prevent the generation of deposits such as impurity components contained in water. There is an effect that it can be suppressed.

1 is a diagram showing a schematic configuration of a die-cast molding machine using a die-cast mold component according to an embodiment of the present invention; FIG. 1 is a perspective view of a die casting mold component according to a first embodiment of the invention; FIG. FIG. 10 is a diagram showing a machined shape of a bent portion of a water tube in a conventional die-casting mold part; FIG. 4 is a diagram showing a machined shape of a curved portion of the water tube in the die casting mold component according to the first embodiment of the present invention; FIG. 4 is a diagram showing a machined shape of a curved portion of the water tube in the die casting mold component according to the first embodiment of the present invention; 1 is a flow diagram of a method for manufacturing a die casting mold component according to a first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the machined shape of the stop hole in the die casting mold component according to the first embodiment of the present invention; FIG. 4 is a diagram for explaining the machined shape of the stop hole in the die casting mold component according to the first embodiment of the present invention; FIG. 7(A) is a cross-sectional view of the die part 41 of FIG. 7(A) in the die casting die part according to the first embodiment of the present invention. FIG. 7B is a view of the die part 41 of FIG. 7A in the die casting die part according to the first embodiment of the present invention when viewed from the right direction of the paper surface. FIG. 7(A) is a cross-sectional view of the die part 42 of FIG. 7(A) in the die casting die part according to the first embodiment of the present invention. FIG. 7B is a view of the die part 42 of FIG. 7A in the die casting die part according to the first embodiment of the present invention when viewed from the right direction of the paper surface. 1 is a cross-sectional view of a water tube of a die casting mold part according to a first embodiment of the present invention; FIG. FIG. 5 is a perspective view of a die casting mold component according to a second embodiment of the present invention; FIG. 10 is a diagram showing a machined shape of a curved portion of a water pipe in a die casting mold component according to a second embodiment of the present invention; FIG. 6 is a flow diagram of a method for manufacturing a die casting mold component according to a second embodiment of the present invention; FIG. 10 is a perspective view of a die casting mold component according to a third embodiment of the invention; FIG. 10 is a perspective view of a die casting mold component according to a fourth embodiment of the invention; FIG. 11 is a flow diagram of a method for manufacturing a die casting mold component according to a fourth embodiment of the present invention;

<Embodiment>
An embodiment of the present invention will be described below with reference to FIGS. 1 to 16. FIG.

<Die casting>
Die casting is a die casting method that is suitable for mass-producing castings with high dimensional accuracy in a short period of time by injecting molten metal (molten metal) into a mold. method.
Die casting is suitable for mass production of high-precision castings in a short period of time.
The die casting process is broadly divided into seven processes: release agent/lubricant application, mold clamping, pouring, injection/filling, holding pressure, mold opening, mold release/ejection.

<Configuration of injection molding machine>
Generally, a die casting machine is mainly composed of a mold clamping unit 20 and an injection unit 30. As shown in FIG.

Die casting machines generally include cold chamber die casting machines and hot chamber die casting machines, but the cold chamber die casting machine will be described here as an example.
As shown in FIG. 1, a die casting machine 1 according to this embodiment includes a die casting mold 10, a mold clamping unit 20, and an injection unit 30. As shown in FIG.

The injection unit 30 also includes an injection sleeve 31 , an injection plunger 32 and an injection cylinder 33 .

The mold clamping unit 20 opens, closes and ejects the die casting mold 10, and includes a toggle type and a direct pressure type that directly opens and closes the mold with a hydraulic cylinder.
In the mold release agent/lubricant application process, which is the first step, before the mold is closed by the mold clamping unit 20, the mold mold part (cavity) is coated with the mold release agent/lubricant, filled and solidified. Improves metal releasability.

The injection unit 30 pours the heated and melted metal (molten metal) into the mold.
Then, the measured molten metal is poured into the injection sleeve 31, and the injection plunger 32 is moved toward the mold at high speed by the injection cylinder 33, thereby filling the mold with the molten metal in a short period of time. The mold is filled with molten metal that solidifies quickly.
After filling, the mold is kept closed and held under pressure until it reaches a temperature at which the molded product can be taken out, and when the molded product solidifies, the mold is opened.

The die-casting die 10 is a metal die for injection injection of molten metal in order to form the molten metal into a certain shape, and is composed of a movable die-casting die part 10A and a fixed die-casting die part 10B.

The movable die casting mold component 10A is moved by the mold clamping unit 20. As shown in FIG.
A water pipe (not shown) is formed inside the movable die casting mold part 10A, a cooling medium circulates in the water pipe, and the mold temperature is maintained at about half the casting temperature of the molten metal.
In other words, if the mold temperature is too low, the flow rate of hot water will decrease and water residue will occur (the mold release agent will not dry and water will remain), making it easier for blowholes to occur. It is designed to be at an appropriate temperature because the adhesion of the agent is inhibited and seizure occurs.

The molten metal enters the die casting mold 10 from the injection sleeve 31, passes through a runner gate (not shown), and fills a cavity (not shown).
Then, after a pressure holding process, the die casting mold 10 is opened, and an ejector rod (not shown) of the molding machine pushes an ejector plate (not shown) of the die casting mold 10 to eject the molded product.

<First embodiment>
A movable die casting mold component 10A according to the first embodiment will be described with reference to FIGS. 2 to 10. FIG.

<Structure of Movable Die Cast Mold Part 10A>
As shown in FIG. 2, the movable die casting mold part 10A according to the present embodiment includes a first die casting that is divided into two along the extension axis of a circular water tube 13 formed by drilling. It is composed of a mold component 11 and a second die casting mold component 12 .

As shown in FIG. 10, the inner surfaces of the semicircular water pipes 13 formed in the first die-casting mold part 11 and the second die-casting mold part 12 are subjected to plating, coating, or thermal spraying. Antirust/deposit adhesion prevention processing 16 is applied.

After the rust prevention and deposit adhesion prevention processing 16 is applied, the first die casting mold part 11 and the second die casting mold part 12 are metal-bonded by, for example, a diffusion bonding method.

In addition, when the diffusion bonding method is used for metal bonding, the processing temperature of the rust prevention/deposit adhesion prevention processing 16 is 600° C. to 1000° C., so heat treatment is required after bonding. Heat resistance is required.
Therefore, in the case of plating, hard chromium plating is preferable, and if the temperature exceeds 700° C., although the composition changes, anti-rust and mold-releasing effects can be expected.
In the case of coating treatment, a TiAlN or AlCrN film containing aluminum and having a high heat resistance temperature is preferable.
Furthermore, in the case of thermal spray film treatment, there are many coatings with heat resistance and releasability, and the options are wide.

The movable die-cast mold part 10A has a circular water pipe formed therein by, for example, drilling.
As shown in FIG. 3, when the water pipe 13 is formed by drilling, for example, an excavation shape of the tip of the drill is formed in the vicinity of the bent portion 13R of the water pipe 13. As shown in FIG.
There is a high possibility that heat check will occur toward the sharp portion 13R2 of the tip of the drill hole due to repeated heating and cooling of the sharp portion of the excavation shape of the tip of the drill.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is processed into a spherical shape by electric discharge machining or the like.
Therefore, in the vicinity of the bent portion 13R of the water tube 13 according to the present embodiment, as shown in FIGS. It is machined into 13R3 or 13R4 to make it spherical.

Further, the movable die-casting mold part 10A is internally formed with, for example, a water pipe with a deep blind hole and a ball-shaped tip.
For example, FIG. 7(A) shows a product 40 made by die casting, and die parts 41 and 42 for producing the product 40 by die casting, and FIG. 7(B). shows a top view of the product.
8(B) is a top view of the mold component 41, and FIG. 8(A) is a cross-sectional view taken along line AA in FIG. 8(B).
9(B) is a bottom view of the mold component 42, and FIG. 9(A) is a cross-sectional view taken along line BB in FIG. 9(B).

As shown in FIG. 8A, the blind hole 41A is formed to a depth toward the opening 41B that satisfies the requirements of satisfying a predetermined strength and improving the cooling effect.
For mold part 42, blind hole 42B is similarly formed to a depth that satisfies the above two requirements.

The arrangement of the blind holes is optimized when designing the mold according to the shape of the product.
In other words, depending on the shape of the product, there will be places where efficiency can be improved with curved holes, and places where only blind holes can be made, so it is necessary to take measures for both.
In the example of FIGS. 8 and 9, when manufacturing a product, the mold part 41 that forms the bottom surface is large enough to allow flexibility in the arrangement of the water pipes, so the water pipes that circulate are processed by forming a bent portion. exemplifies the case.
On the other hand, in the case of the mold part 42 that makes a hole in the product, the mold part 42 itself is small and there is no freedom in arranging the water pipes. will come to

<Manufacturing Method of Movable Die Cast Mold Part 10A>
A method of manufacturing the movable die casting mold component 10A according to the present embodiment will be described with reference to FIGS. 6 and 10. FIG.

First, a movable die casting mold component 10A that does not include the water pipe 13 is produced (step S100).
As for the method of creating the movable die casting mold component 10A, a conventional method of creating may be used.

The movable die casting mold component 10A produced in step S100 is processed by drilling or the like to form the water pipe 13 therein (step S200).
In step S200, processing is also performed to form a shape 13R3 that flattens the bottom of the hole or a shape 13R4 that makes it spherical.

The movable die-casting mold part 10A produced in step S200 is divided into two along the extension axis of the water pipe to produce a first die-casting mold part 11 and a second die-casting mold part 12. (Step S300).

As shown in FIG. 10, the inner surfaces of the semicircular water pipes 13 formed in the first die casting mold part 11 and the second die casting mold part 12 produced in step S300 are plated or coated. A rust prevention/deposit adhesion prevention process 16 is applied by treatment, thermal spraying film treatment, or the like (step S400).

In step S400, the first die-casting die part 11 and the second die-casting die part 12 subjected to the rust prevention and sediment adhesion prevention processing 16 are treated with a metal detergent to remove rust prevention oil and marking. (magic) etc. are removed, and cleaning is performed using an air blow so that no dust or the like adheres to the joint surface 15 (step S500).

In step S500, for example, the degreased and cleaned first die casting mold part 11 and the second die casting mold part 12 are arranged on a pedestal set in a diffusion bonding apparatus.
At this time, the first die-casting mold component 11 is placed on the second die-casting mold component 12 in a shifted position.
The positions of the positioning pin holes 14 are aligned in the same direction.
Next, the first die-casting mold part 11 is slid so as to remove air from the contact surfaces of the first die-casting mold part 11 and the second die-casting mold part 12, and when they are roughly aligned. Then, the position of the positioning pin hole 14 is confirmed and finely adjusted. When the positioning is completed, the pin is inserted into the positioning pin hole 14 from the pointed side to perform positioning (step S600).

Then, in step S600, when the positioning is completed, one of the previously inserted pins is removed and replaced with a shorter pin, and this operation is performed for all the pins.
Further, after confirming that the newly inserted short pin is hidden in the positioning pin hole 14, the misalignment of the outer shape is adjusted.
The newly inserted pin is sintered during the metal joining process without being pulled out (step S700).

Next, the movable die casting mold component 10A is installed in the diffusion bonding apparatus (step S800).

Then, the first die-casting die part 11 and the second die-casting die part 12 are metal-bonded by a diffusion bonding apparatus to manufacture the movable die-casting die part 10A (step S900).

<Action/effect>
The movable die casting mold component 10A according to the present embodiment includes a water pipe 13 in which the hole bottom of the bent portion 13R is flattened, the blind hole 41A is deepened, and the tip is flattened by drilling. , along the extension axis of the water pipe 13, the water pipe 13 is divided into two parts, the inner surface of the water pipe 13 is subjected to rust prevention and sediment adhesion prevention processing 16, and the two divided members (first die casting mold parts 11. The second die casting mold part 12) is integrated by metal bonding.
The water tube 13 provided inside the die-casting mold part 10A is drilled to flatten the bottom of the bent portion 13R, deepen the blind hole 41A, and flatten the tip.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is flattened by electrical discharge machining or the like.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
In addition, by deepening the blind hole 41A and flattening the tip portion by electric discharge machining or the like, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole during drilling. can be done.
Also, the water tube 13 provided inside the die casting mold part 10A is divided into two along its extension axis.
Therefore, it is possible to accurately and easily carry out the rust prevention/deposit adhesion prevention processing 16 for plating, coating, and thermal spraying.
Also, the two divided members (the first die-casting mold part 11 and the second die-casting mold part 12) are integrated by metal bonding.
Therefore, it is possible to produce a die-casting die part having a water pipe inside which is accurately subjected to the rust prevention/deposit adhesion prevention processing 16 of plating, coating, and thermal spraying.
As a result, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurities contained in water.
Moreover, the water pipe 13 is formed by drilling, for example.
Therefore, the water pipe 13 can be formed inside the die casting mold part 10A by a simple construction method.
The inner surface of the water pipe 13 formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part 10A of this embodiment, as shown in FIG. 10, the water tube 13 formed inside is subjected to a rust-prevention and sediment-adhesion prevention process 16 that performs a plating process, a coating process, or a thermal spray film process. ing.
Therefore, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurity components contained in water.

The movable die casting mold component 10A according to the present embodiment includes a water pipe 13 in which the hole bottom of the bent portion is formed into a spherical shape by drilling. The inner surface of the water pipe 13 is subjected to rust prevention and deposit adhesion prevention processing 16. are integrated.
The water pipe 13 provided inside the die-cast mold component 10A is drilled to have a spherical bent portion 13R.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, only the tip portion of the hole drilled by the drill is processed into a spherical shape by electric discharge machining or the like.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
Also, the water tube 13 provided inside the die casting mold part 10A is divided into two along its extension axis.
Therefore, it is possible to accurately and easily carry out the rust prevention/deposit adhesion prevention processing 16 for plating, coating, and thermal spraying.
Also, the two divided members (the first die-casting mold part 11 and the second die-casting mold part 12) are integrated by metal bonding.
Therefore, it is possible to produce a die-casting die part having a water pipe inside which is accurately subjected to the rust prevention/deposit adhesion prevention processing 16 of plating, coating, and thermal spraying.
As a result, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurities contained in water.
Moreover, the water pipe is formed by drilling, for example.
Therefore, the water pipe 13 can be formed inside the die casting mold part 10A by a simple construction method.
The inner surface of the water pipe 13 formed by drilling is accompanied by surface roughness, which, if left as it is, promotes the generation of rust and promotes the generation of deposits such as impurities contained in water.
However, in the die-cast mold part 10A of this embodiment, as shown in FIG. 10, the water tube 13 formed inside is subjected to a rust-prevention and sediment-adhesion prevention process 16 that performs a plating process, a coating process, or a thermal spray film process. ing.
Therefore, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurity components contained in water.

Further, the movable die casting mold part 10A according to the present embodiment is subjected to the rust prevention/precipitation prevention processing 16 by plating.
In other words, the inner surface of the water tube 13 formed by drilling is accompanied by surface roughness, and plating is applied to counteract this surface roughness.
Therefore, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurity components contained in water.

Further, the movable die-casting mold part 10A according to the present embodiment is subjected to the rust prevention/deposit adhesion prevention processing 16 by coating.
In other words, the inner surface of the water tube 13 formed by drilling is accompanied by surface roughness, and the surface roughness is treated with a coating process.
Therefore, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurity components contained in water.

Further, the movable die casting mold part 10A according to the present embodiment is subjected to the rust prevention/precipitation prevention processing 16 by thermal spraying film treatment.
In other words, the inner surface of the water tube 13 formed by drilling is accompanied by surface roughness, and the thermal spray film treatment is applied to this surface roughness.
Therefore, it is possible to obtain the die casting mold component 10A that suppresses the generation of rust inside the water tube 13 and suppresses the generation of deposits such as impurity components contained in water.

Also, in the movable die casting mold component 10A according to the present embodiment, metal bonding is performed by diffusion bonding.
Diffusion bonding has the advantage that one metal bonding process can be performed in a short time and the bonding strength is close to 100%.
Therefore, this method is suitable for metal joining of the die casting mold part 10A that requires strength.

<Second embodiment>
A movable die casting mold component 10A1 according to the second embodiment will be described with reference to FIGS. 11 to 13. FIG.
It should be noted that the components denoted by the same reference numerals as in the first embodiment have the same functions, and detailed description thereof will be omitted.

<Structure of Movable Die Casting Mold Part 10A1>
As shown in FIG. 11, a movable die casting mold part 10A1 according to the present embodiment includes, for example, a first die casting split into two along the extension axis of a rectangular water pipe 13A formed by grooving. It is composed of a mold component 11A and a second die casting mold component 12A.

The movable die-casting mold part 10A has a rectangular water pipe formed therein, for example, by grooving at least the outer side of the bent portion 13R.
When forming the water pipe 13A by drilling, for example, an excavation shape of the tip of the drill is formed in the vicinity of the bent portion 13R of the water pipe 13A.
A sharp portion of the excavation shape at the tip of the drill is likely to cause a heat check toward the sharp portion of the tip of the drill hole due to repeated heating and cooling.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, in the present embodiment, for example, as shown in FIG. 12, at least the outer side of the bent portion 13R is rounded by grooving.

The inner surfaces of the U-shaped water pipes 13A formed in the first die-casting die part 11A and the second die-casting die part 12A are plated, coated, or thermally sprayed to prevent rust and adhere deposits. A protective finish 16 is applied.

<Manufacturing Method of Movable Die Cast Mold Part 10A1>
A method of manufacturing the movable die casting mold component 10A1 according to this embodiment will be described with reference to FIG.

First, a movable die casting mold component 10A1 that does not include the water pipe 13A is produced (step S100).
As for the method of creating the movable die casting mold component 10A1, a conventional method of creating may be used.

The movable die-casting mold part 10A1 created in step S100 is divided into two along the extension axis of the water tube 13A formed in a rectangular shape by later processing, and the first die-casting mold part 11A, A second die casting mold component 12A is created (step S210).

The first die-casting mold part 11A and the second die-casting mold part 12A produced in step S210 are processed to form a U-shaped water pipe 13A inside by grooving or the like. (Step S310).
At least the outer side of the bent portion 13R of the U-shaped water tube 13A is also subjected to R processing in this step.

The inner surface of the U-shaped water tube 13A formed in the first die-casting mold part 11A and the second die-casting mold part 12A prepared in step S310 is subjected to a plating treatment, a coating treatment, a thermal spraying film treatment, or the like. , antirust/deposit adhesion prevention processing 16 is applied (step S400).

In step S400, the first die-casting die part 11A and the second die-casting die part 12A subjected to the rust prevention and sediment adhesion prevention processing 16 are treated with a metal detergent to remove rust prevention oil and marking. (magic), etc. are removed, and cleaning is performed using an air blow so that there is no adhesion of dust or the like to the joint surface 15 (step S500).

In step S500, for example, the degreased and cleaned first die casting mold component 11A and the second die casting mold component 12A are placed on a pedestal set in a diffusion bonding apparatus.
At this time, the first die-casting mold part 11A is placed on the second die-casting mold part 12A in a shifted position.
The positions of the positioning pin holes 14 are aligned in the same direction.
Next, the first die-casting mold part 11A is slid so as to remove the air from the contact surfaces of the first die-casting mold part 11A and the second die-casting mold part 12A. Then, the position of the positioning pin hole 14 is confirmed and finely adjusted. When the positioning is completed, the pin is inserted into the positioning pin hole 14 from the pointed side to perform positioning (step S600).

Then, in step S600, when the positioning is completed, one of the previously inserted pins is removed and replaced with a shorter pin, and this operation is performed for all the pins.
Further, after confirming that the newly inserted short pin is hidden in the positioning pin hole 14, the misalignment of the outer shape is adjusted.
The newly inserted pin is sintered during the metal joining process without being pulled out (step S700).

Next, the movable die casting mold part 10A1 is installed in the diffusion bonding apparatus. (Step S800).

Then, the first die-casting die part 11A and the second die-casting die part 12A are metal-bonded by a diffusion bonding apparatus to manufacture the movable die-casting die part 10A1 (step S900).

<Action/effect>
The movable die casting mold part 10A1 according to the present embodiment has a water pipe 13 in which at least the outer side of the bent portion 13R is rounded by groove processing, the blind hole 41A is deepened by drilling, and the tip portion is rounded. The water pipe 13 is divided into two along the extension axis, and the inner surface of the water pipe 13 is subjected to rust prevention and sediment adhesion prevention processing 16, and the two divided members (first die casting mold The component 11A and the second die casting mold component 12A) are integrated by metal bonding.
The water pipe 13 provided inside the die casting mold part 10A1 is rounded at least on the outer side of the bent portion 13R by groove processing, and the blind hole 41A is deepened by drilling and the tip is rounded.
In other words, the heat check occurs from the outer surface that is in direct contact with the molten aluminum used for die casting, and the crack tends to extend toward the sharp tip of the sharp drilled hole.
Therefore, in order to suppress the above phenomenon, specifically, for example, at least the outside of the bent portion is rounded by grooving.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the bent portion 13R during grooving.
In addition, by deepening the blind hole 41A and processing the tip into a spherical shape by electric discharge machining or the like, it is possible to effectively suppress the heat check that is likely to occur toward the sharp part of the tip of the drill hole during drilling. can be done.
Also, the water pipe 13A provided inside the die casting mold part 10A1 is divided into two along its extension axis.
Therefore, it is possible to accurately and easily carry out rust prevention and deposit adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Also, the two divided members are integrated by metal bonding.
Therefore, it is possible to produce the die-cast mold part 10A1 in which the water pipe 13A is accurately subjected to rust prevention and sediment adhesion prevention processing such as plating, coating, and thermal spraying.
As a result, it is possible to obtain the die casting mold component 10A1 that suppresses the generation of rust inside the water tube 13A and suppresses the generation of deposits such as impurity components contained in water.
Also, the water pipe 13A is formed by, for example, groove processing.
Therefore, the water pipe 13A can be formed inside the die casting mold part 10A1 by a simple construction method.
The inner surface of the water tube 13A formed by grooving can be less rough than drilling. can occur.
However, in the die-cast mold part 10A1 of this embodiment, the water pipe 13A formed inside is subjected to rust prevention and sediment adhesion prevention processing such as plating treatment, coating treatment, and thermal spray film treatment.
Therefore, it is possible to obtain the die casting mold component 10A1 that suppresses the generation of rust inside the water tube 13A and suppresses the generation of deposits such as impurity components contained in water.

<Third Embodiment>
A movable die casting mold component 10A2 according to the third embodiment will be described with reference to FIGS. 14 to 16. FIG.
It should be noted that the components denoted by the same reference numerals as in the first embodiment and the second embodiment have the same functions, so detailed description thereof will be omitted.

<Structure of Movable Die Cast Mold Part 10A2>
As shown in FIG. 14, the movable die-casting mold part 10A2 according to the present embodiment includes, for example, a flat surface portion of a water tube 13B configured by a semicircular groove formed by grooving and an opposing flat surface. It is composed of a first die-casting mold part 11B and a second die-casting mold part 12B which are divided into two along the .
In addition, as shown in FIG. 15, along the plane portion of the water tube 13C, which is configured by, for example, a U-shaped groove formed by grooving and a plane facing each other, the first divided into two 11C and a second die casting mold part 12C.

The inner surfaces of the semicircular or U-shaped water pipes 13B and 13C formed in the first die casting mold parts 11B and 11C and the second die casting mold parts 12B and 12C are plated, coated, or sprayed. A treated rust prevention/deposition prevention treatment 16 is applied.

<Manufacturing Method of Movable Die Cast Mold Part 10A2>
A method of manufacturing the movable die casting mold component 10A2 according to this embodiment will be described with reference to FIG.

First, a die casting mold part 10A2 that does not include water pipes 13B and 13C is produced (step S100).
As for the method of creating the movable die casting mold component 10A2, a conventional method of creating may be used.

The movable die casting mold part 10A2 produced in step S100 is divided into two along a plane facing the water pipes 13B and 13C formed as semicircular or U-shaped grooves in a later process. , first die casting mold parts 11B and 11C and second die casting mold parts 12B and 12C are produced (step S220).

The first die-casting mold parts 11B, 11C and the second die-casting mold parts 12B, 12C produced in step S220 are grooved or the like to form semicircular or U-shaped water pipes inside them. Processing for forming 13B and 13C is performed (step S320).
At least the outside of the bent portion 13R of the semicircular or U-shaped water pipes 13B and 13C is also rounded in this step.

On the inner surfaces of the semicircular or U-shaped water pipes 13B and 13C formed in the first die casting mold parts 11B and 11C and the second die casting mold parts 12B and 12C created in step S320 A rust prevention/deposit adhesion prevention process 16 is performed by plating, coating, thermal spraying, or the like (step S400).

In step S400, the first die-casting mold parts 11B, 11C and the second die-casting mold parts 12B, 12C subjected to the rust prevention and deposit adhesion prevention processing 16 are treated with a metal detergent. Rust oil, markings (markers), etc. are removed, and the bonding surface 15 is cleaned by using an air blower so that there is no adhesion of dust or the like (step S500).

In step S500, for example, the first die casting mold parts 11B and 11C and the second die casting mold parts 12B and 12C that have been degreased and cleaned are placed on a pedestal set in a diffusion bonding apparatus. Deploy.
At this time, the first die casting mold parts 11B and 11C are placed on the second die casting mold parts 12B and 12C while being shifted.
The positions of the positioning pin holes 14 are aligned in the same direction.
Next, the first die casting mold parts 11B and 11C are slid so as to remove the air from the contact surfaces of the first die casting mold parts 11B and 11C and the second die casting mold parts 12B and 12C, When the positions are roughly aligned, it is checked whether the positions of the positioning pin holes 14 are aligned, and fine adjustments are made. When the positions are aligned, the pin is inserted into the positioning pin holes 14 from the pointed side to perform positioning. (Step S600).

Then, in step S600, when the positioning is completed, one of the previously inserted pins is removed and replaced with a shorter pin, and this operation is performed for all the pins.
Further, after confirming that the newly inserted short pin is hidden in the positioning pin hole 14, the misalignment of the outer shape is adjusted.
The newly inserted pin is sintered during the metal joining process without being pulled out (step S700).

Next, the movable die casting mold part 10A2 is installed in the diffusion bonding apparatus. (Step S800).

Then, the first die casting mold parts 11B, 11C and the second die casting mold parts 12B, 12C are metal-bonded by a diffusion bonding apparatus to manufacture the movable die casting mold part 10A (step S900).

<Action/effect>
The movable die casting mold part 10A2 according to the present embodiment includes water tubes 13B and 13C in which at least the outside of the bent portion 13R is R-processed. The inner surfaces of 13B and 13C are subjected to rust prevention and deposit adhesion prevention processing 16, and the divided members (first die casting mold parts 11B and 11C, second die casting mold parts 12B and 12C) are divided into Integrated by metal bonding.
In other words, the water pipes 13B and 13C provided inside the die casting mold part 10A2 are rounded at least on the outside of the bent portion 13R by grooving.
Therefore, it is possible to effectively suppress the heat check that is likely to occur toward the sharp portion of the tip of the drill hole in drilling.
Also, the water pipes 13B and 13C provided inside the die casting mold part 10A2 are divided into two along the extension axis.
Therefore, it is possible to accurately and easily carry out the rust prevention/deposit adhesion prevention processing 16 for plating, coating, and thermal spraying.
Also, the two divided members (first die casting mold parts 11B and 11C, second die casting mold parts 12B and 12C) are integrated by metal joining.
Therefore, it is possible to produce the die-cast mold part 10A2 in which the water pipes are accurately subjected to the rust prevention/deposit adhesion prevention processing 16, which includes plating, coating, and thermal spraying.
As a result, it is possible to obtain the die casting mold part 10A2 that suppresses the generation of rust inside the water pipes 13B and 13C and suppresses the generation of deposits such as impurities contained in water.
Also, the water pipes 13B and 13C are formed by, for example, grooving.
Therefore, the water pipes 13B and 13C can be formed inside the die casting mold part 10A2 by a simple construction method.
The inner surfaces of the water pipes 13B and 13C formed by grooving can be less rough than drilling. things may occur.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design within the scope of the gist of the present invention.
For example, in the above embodiment, the blind hole is deepened and the tip is processed into a spherical shape. In consideration of the deposition of rust and impurities, only plating, coating, or thermal spraying may be performed without the spherical processing.

Further, in the above-described embodiment, the drilling of the hole has been exemplified and explained, but the hole may be machined by an end mill or electric discharge.

Further, in the above embodiment, drilling or electric discharge machining is used as an example for machining the bottom of the hole. You may make it process by .

In the above-described embodiment, as a method of manufacturing a die-cast mold part, the procedure of forming the shape of the mold part, processing the water hole to divide it into two parts, performing rust prevention and sediment adhesion prevention processing, and joining the parts is performed. Although it has been described as an example, when diffusion bonding is used, the atoms in the contacting surfaces are diffused by heating, pressurizing, and holding the bonding surfaces, and the bonding is performed without melting. The water pipes are processed and layered on a plate whose surfaces are parallel and flat. After joining, shape processing of the mold parts may be performed.
More specifically, since the joint is heated to about 1000° C., it is hardened by quenching. Therefore, in order to carry out post-processing, annealing is performed to soften it, rough processing is performed in a soft state to create a rough shape, quenching and tempering to the hardness required by the customer to increase the hardness, grinding, cutting, etc. Electrical discharge machining or the like may be performed to finish the final shape.

1 injection molding machine 10 die casting mold 10A movable die casting mold part 10B stationary die casting mold part 11 first die casting mold part 11A first die casting mold part 11B first die casting mold Second die casting mold part 12A; Second die casting mold part 12B; Second die casting mold part 12C; Second die casting mold part 13; Water tube 13B; Water tube 13C; Water tube 13R; Bending portion 14; Positioning pin hole 15; Joint surface 16; injection cylinder 41; mold part 41A; blind hole 41B; opening 42; mold part 42A;

Claims (8)

It has an opening , forms a water pipe with a bend inside by drilling, flattens the excavated shape of the bottom of the hole at the tip of the drill by electric discharge machining , and satisfies the predetermined strength toward the opening. with blind-drilled water tubes to a depth that meets the requirements of cooling and cooling ,
Divided into two along the extension axis of the water tube,
The inner surface of the water pipe is treated to prevent rust and adhesion of deposits,
A die casting mold part characterized in that the two divided members are integrated by metal bonding. It has an opening , forms a water pipe with a bend inside by drilling, and the hole bottom at the tip of the drill is excavated in a spherical shape by electric discharge machining , and the predetermined strength is satisfied toward the opening. with blind-drilled water tubes to a depth that meets the requirements of cooling and cooling ,
Divided into two along the extension axis of the water tube,
The inner surface of the water pipe is treated to prevent rust and adhesion of deposits,
A die casting mold part characterized in that the two divided members are integrated by metal bonding. 3. A die casting mold part according to claim 1, wherein said rust prevention and deposition prevention processing is plating. 3. A die casting mold part according to claim 1, wherein said anticorrosion and sediment adhesion prevention processing is coating processing. 3. A die casting mold part according to claim 1, wherein said anticorrosive and sediment adhesion prevention processing is thermal spraying film processing. 6. A die casting mold component according to any one of claims 1 to 5 , wherein said metal bonding is bonding by a diffusion bonding method. Forming a water pipe having a bent portion by drilling inside a die casting mold part having an opening, flattening the drilled shape of the bottom of the hole at the tip of the drill by electric discharge machining , and directing it toward the opening, a water tube forming step of forming a water tube with a blind hole deepened to a depth that satisfies the requirements of satisfying a predetermined strength and increasing the cooling effect ;
A splitting step of splitting the die casting mold part into two along the extension axis of the water tube;
A processing step in which the inner surface of the water pipe divided into two parts is subjected to rust prevention and sediment adhesion prevention processing;
In the processing step, the inner surface of the water pipe divided into two parts is a joining step of integrating the two-part die casting mold parts that have been processed to prevent rust and adherence of deposits by metal joining;
A method for manufacturing a die casting mold part, comprising: A water pipe having a bent portion is formed by drilling inside a die-cast mold part having an opening, and the shape of the bottom of the hole at the tip of the drill is made spherical by electric discharge machining and directed toward the opening, a water tube forming step of forming a water tube with a blind hole deepened to a depth that satisfies the requirements of satisfying a predetermined strength and increasing the cooling effect ;
A splitting step of splitting the die casting mold part into two along the extension axis of the water tube;
A processing step in which the inner surface of the water pipe divided into two parts is subjected to rust prevention and sediment adhesion prevention processing;
In the processing step, the inner surface of the water pipe divided into two parts is a joining step of integrating the two-part die casting mold parts that have been processed to prevent rust and adherence of deposits by metal joining;
A method for manufacturing a die casting mold part, comprising:

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