JP5035086B2 - Coarse material cooling apparatus and method - Google Patents

Description

  The present invention relates to a coarse material cooling apparatus and method for cooling a high temperature coarse material formed by a mold such as a casting mold, and more specifically, after the mold is opened, the coarse material becomes a movable mold. The present invention relates to a technique for cooling the rough material and the mold in a restrained state.

Conventionally, as a method of producing a product using a casting mold using aluminum alloy or the like as a molding material, first, a cast coarse material is formed by the casting mold, and then the cast coarse material is heated. A technique for manufacturing a product by applying heat treatment such as quenching and finally performing machining such as trimming, bolt drilling, deburring, and the like is widely known.
In order to shorten the work time (cycle time) required for the entire work process for manufacturing the product and improve the accuracy of the product when moving to the machining process after the molding process as described above, It is necessary to cool the material as quickly as possible from the temperature immediately after molding (high temperature) to a temperature that can be handled by an operator (for example, about 60 ° C.).

  As an example of a method for cooling such a cast coarse material, an internal cooling method in which a cooling hole is provided in a mold, and a cooling medium such as water is blown to the cast coarse material through the inside of the mold through the cooling hole is used. Technology is known. In this internal cooling method, it is possible to cool the cast coarse material and cool the mold from the inside. However, this internal cooling method has problems such as a complicated internal structure of the mold for internal cooling and a shortened mold life due to the formation of a complicated structure inside the mold. It was.

On the other hand, as an example of an external cooling method in which a cast coarse material is immersed in a cooling medium such as water or a cooling medium such as cooling air is sprayed on the cast coarse material, a technique such as Patent Document 1 shown below is provided. It is disclosed.
The technology disclosed in Patent Document 1 is a cast coarse material introduced into the dry sand by fluidizing the dry sand with air blown from an air chamber and cooling the dry sand by heat exchange through a cooling water pipe. It is a technology that rapidly cools. And the cooling rate and cooling temperature of a casting coarse material are made changeable by changing the temperature and flow volume of the cooling water in the said cooling water piping.
According to the technique disclosed in Patent Document 1, as described above, the cooling rate of the cast coarse material can be increased by changing the temperature and flow rate of the cooling water in the cooling water pipe. It becomes possible to do. However, in the configuration in which the entire cast coarse material is cooled as in the technique disclosed in Patent Document 1, when the cast coarse material having a complicated shape such as a cylinder block or a transmission case is cooled, the cast coarse material has a thick wall. Non-uniform temperature distribution occurs between a portion with a low cooling rate such as a thin portion and a portion with a high cooling rate such as a thin-walled portion, and due to such variation in cooling rate, for example, deformation shrinkage in a high-temperature portion, There is a possibility that local partial deformation of the cast coarse material that is difficult to predict such as solidification deformation due to supercooling may occur, and the dimensional accuracy may be deteriorated by such partial deformation.
Japanese Utility Model Publication No. 5-53768

  The present invention has been made in view of the situation as described above, and suppresses local partial deformation of the coarse material due to the variation in the cooling rate, thereby improving the dimensional accuracy of the coarse material. It is an object of the present invention to provide a material cooling device and method.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

A coarse material cooling device according to a first aspect of the present invention described in claim 1 is a coarse material cooling device that cools a high-temperature coarse material formed by a mold composed of a fixed mold and a movable mold. After the mold is opened, the coarse material is cooled in a state where the coarse material is constrained by the movable mold, and when there is no cooling to the coarse material, the coarse material is opened after the mold is opened. The portion which does not become less than the recrystallization temperature until the mold is released is intensively cooled .
According to this, not only the rough material of a product having a simple shape but also the cooling material of a product having a complicated shape such as a cylinder block or a transmission case is cooled, the rough material is restrained to a movable mold. By cooling the rough material in a state in which the movable material is cooled, the movable mold becomes a place for heat to escape from a portion where the cooling rate is slow, such as a thick portion of the coarse material, and a place where the coarse material is fast cooled by the movable die. It will keep warm. In this way, the coarse material and the movable mold can exchange heat with each other to promote uniform cooling rate of the coarse material.
Therefore, local partial deformation of the coarse material due to the variation in the cooling rate can be suppressed, and the dimensional accuracy of the coarse material can be improved.
Further, since the coarse material can be sufficiently cooled by external cooling, the cooling structure inside the mold can be simplified.

In addition, by cooling the coarse material in a state where the coarse material is constrained to the movable die in this way, the movable die can be cooled via the coarse material.
Therefore, partial overheating of the movable mold can be prevented and the residual thermal stress of the movable mold can be reduced, so that the mold life can be extended.
Furthermore, the movable mold is cooled through the rough material in this way, and in particular, the surface temperature of the movable mold can be lowered, thereby preventing the Leidenfrost phenomenon during the application of the mold release agent, and the adhesion of the mold release agent. Since it can be promoted, it is possible to reduce the mold release resistance when releasing the coarse material from the movable mold, prevent deterioration of accuracy due to the mold release resistance, and suppress the seizure of the coarse material, so that molding Loss of material related to defects can be reduced.

According to a second aspect of the present invention, the coarse material cooling device is further detected by a nozzle that ejects a cooling medium onto the coarse material, a temperature sensor that detects a temperature distribution of the coarse material, and the temperature sensor. A control unit that extracts a portion of the coarse material that is equal to or higher than the recrystallization temperature based on the temperature distribution and controls the nozzle so that a cooling medium is ejected to the extracted portion that is equal to or higher than the recrystallization temperature; It is equipped with .

According to a third aspect of the present invention, the coarse material cooling device is provided in a robot that takes out the coarse material from the movable mold .

A coarse material cooling method according to a second aspect of the present invention as set forth in claim 4 is a coarse material cooling method for cooling a high temperature crude material formed by a mold comprising a fixed mold and a movable mold. After the mold is opened, the coarse material is cooled in a state where the coarse material is constrained by the movable mold, and when there is no cooling to the coarse material, the coarse material is opened after the mold is opened. The portion which does not become less than the recrystallization temperature until the mold is released is intensively cooled .
According to this, not only the rough material of a product having a simple shape but also the cooling material of a product having a complicated shape such as a cylinder block or a transmission case is cooled, the rough material is restrained to a movable mold. By cooling the rough material in a state in which the movable material is cooled, the movable mold becomes a place for heat to escape from a portion where the cooling rate is slow, such as a thick portion of the coarse material, and a place where the coarse material is fast cooled by the movable die. It will keep warm. In this way, the coarse material and the movable mold can exchange heat with each other to promote uniform cooling rate of the coarse material.
Therefore, local partial deformation of the coarse material due to the variation in the cooling rate can be suppressed, and the dimensional accuracy of the coarse material can be improved.
Further, since the coarse material can be sufficiently cooled by external cooling, the cooling structure inside the mold can be simplified.

In addition, by cooling the coarse material in a state where the coarse material is constrained to the movable die in this way, the movable die can be cooled via the coarse material.
Therefore, partial overheating of the movable mold can be prevented and the residual thermal stress of the movable mold can be reduced, so that the mold life can be extended.
Furthermore, the movable mold is cooled through the rough material in this way, and in particular, the surface temperature of the movable mold can be lowered, thereby preventing the Leidenfrost phenomenon during the application of the mold release agent, and the adhesion of the mold release agent. Since it can be promoted, it is possible to reduce the mold release resistance when releasing the coarse material from the movable mold, prevent deterioration of accuracy due to the mold release resistance, and suppress the seizure of the coarse material, so that molding Loss of material related to defects can be reduced.

  As effects of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, it is possible to improve the dimensional accuracy of the coarse material by suppressing local partial deformation of the coarse material due to the variation in the cooling rate. Further, partial overheating of the movable mold can be prevented and the residual thermal stress of the movable mold can be reduced, so that the mold life can be extended.
In addition, it is possible to suppress deformation and shrinkage of the coarse material, which is likely to occur in a portion where the temperature exceeds the recrystallization temperature after the release of the coarse material from the movable mold, and to improve the dimensional accuracy of the coarse material .

According to the second aspect of the present invention, it is possible to suppress deformation and shrinkage of the coarse material that is likely to occur in a portion that becomes higher than the recrystallization temperature after releasing the coarse material from the movable mold , and to improve the dimensional accuracy of the coarse material. Can do. In addition, it is possible to extract an optimal cooling point and to intensively cool the cooling point, to promote uniform temperature distribution of the coarse material, and to prevent rough movement against heat transfer that is difficult to predict in the coarse material. The flexibility of the material cooling device can be improved .

According to the third aspect of the present invention, since the step of taking out the coarse material and the step of cooling the coarse material are performed in the same process, the cycle time of the entire product manufacturing process can be shortened .

According to the invention described in claim 4, it is possible to improve the dimensional accuracy of the coarse material by suppressing local partial deformation of the coarse material due to the variation in the cooling rate. Further, partial overheating of the movable mold can be prevented and the residual thermal stress of the movable mold can be reduced, so that the mold life can be extended .
In addition, it is possible to suppress deformation and shrinkage of the coarse material, which is likely to occur in a portion where the temperature exceeds the recrystallization temperature after the release of the coarse material from the movable mold, and to improve the dimensional accuracy of the coarse material .

  Below, with reference to FIG. 1, the process of shape | molding the casting rough material 6 using the metal mold | die 1 which is one Embodiment of the metal mold | die which concerns on this invention, and the metal mold | die 1 is demonstrated.

As shown in FIG. 1A, the mold 1 is a casting mold, and includes a fixed mold 2, a movable mold 3, and the like.
As shown in FIG. 1B, in the mold 1, the fixed mold 2 and the movable mold 3 are clamped. At this time, a cavity 4 is formed between the fixed mold 2 and the movable mold 3. As shown in FIG. 1 (c), a molten aluminum 5 made by melting an aluminum alloy as a molding material by a ladle 7 is poured into a sleeve 8. As shown in FIG. 1 (d), the molten aluminum 5 is injected and injected into the cavity 4 by the plunger 9, and as shown in FIG. 1 (e), the molten aluminum 5 is solidified by being left for a predetermined time. The coarse material 6 is cast into the shape of the cavity 4.

The fixed mold 2 and the movable mold 3 are one embodiment of the fixed mold and the movable mold according to the present invention, and a molding that forms a molding shape of the surface of the cast coarse material 6 on the surface of the fixed mold 2 and the surface of the movable mold 3. A surface (not shown) is formed, and the shape of the mold 1 is transferred to the cast coarse material 6 through the molding surface.
In addition, the metal mold | die which concerns on this invention is not limited to the metal mold | die 1 of this embodiment, The rough material immediately after shaping | molding becomes high temperature, and cools in order to perform the said rough material in the lower process of a shaping | molding process. It is sufficient if it is a mold for molding a necessary rough material, and for example, a mold such as a forging mold is widely included.

The cavity 4 is an embodiment of a space for determining the shape transferred to the rough material by the mold according to the present invention, and is formed between the fixed mold 2 and the movable mold 3 when they are clamped. Space. In the present embodiment, the cavity 4 has the shape of an engine cylinder block.
The shape of the space that determines the shape to be transferred to the rough material by the mold according to the present invention is not limited to the shape of the cavity 4 according to the present embodiment (the shape of the cylinder block of the engine). The space may have a shape such as a crankcase of an engine, and widely includes not only a simple shape but also a complicated shape.

The molten aluminum 5 is an embodiment of the molding material of the coarse material according to the present invention, and becomes the molding material of the casting coarse material 6. In this embodiment, the molten aluminum 5 is a molten metal obtained by melting an aluminum alloy having a melting point of about 650 ° C., and is heated to about 700 ° C. and melted. Further, the molten aluminum 5 is injected into the cavity 4 in a state where pressure is applied by a pressure feeding means (not shown), so that the molten aluminum 5 reaches every corner of the cavity 4, and the cavity 4 has a complicated shape. Even in the case of having it, the shape of the cavity 4 can be sufficiently transferred to the cast coarse material 6.
In addition, the molding material of the rough | crude material shape | molded with the metal mold | die which concerns on this invention is not limited to the aluminum molten metal 5 of this embodiment, What is necessary is just a molten metal which fuses metals, such as a zinc alloy, a magnesium alloy, and iron. .

The cast coarse material 6 is an embodiment of the coarse material according to the present invention, and is a coarse material formed by the mold 1 as described above. The cast coarse material 6 formed in the shape of the cylinder block of the engine in this way is subjected to heat treatment such as heating and quenching in the lower process of the molding process, and further trimming, bolt drilling, and deburring Etc., it can be used as a product (engine cylinder block).
Note that the coarse material according to the present invention is not limited to the cast coarse material 6 of the present embodiment, and may be any material that has a high temperature immediately after molding, and widely includes, for example, high-precision molded products that become products after molding.

Below, with reference to FIG. 2, the coarse material cooling device 10 which is one Embodiment of the coarse material cooling device which concerns on this invention is demonstrated.
The coarse material cooling device 10 is a device that cools the cast coarse material 6 cast by the mold 1.
As shown in FIG. 2, the coarse material cooling device 10 according to the present embodiment is a device that ejects water as a cooling medium for cooling the cast coarse material 6. The coarse material cooling device 10 includes a pipe 12, a nozzle 13, a storage tank, a pump (both not shown), and the like. Water that serves as a cooling medium is stored in the storage tank, and the pump that serves as a means for pumping water is connected to the storage tank. Further, one side of the pipe 12 is connected to this pump, and a nozzle 13 is provided on the other side of the pipe 12. With the pressure of the pump, water is ejected from the storage tank toward the cast coarse material 6 from the nozzle 13 serving as the ejection port via the pipe 12 and the like.
Further, as shown in FIG. 2, in this embodiment, the coarse material cooling device 10 is configured such that the cast coarse material 6 cast by the mold 1 is cast by the movable die 3 after the mold 1 is opened. The cast coarse material 6 is cooled in a state where the material 6 is restrained. That is, after the movable mold 3 is retracted from the fixed mold 2 and before the cast coarse material 6 is released from the movable mold 3, the coarse cast material 6 is cooled by the coarse material cooling device 10, so that the cast coarse material 6 is cooled. Both the material 6 and the movable die 3 in contact with the cast coarse material 6 are cooled together.

As described above, the coarse material cooling device 10, which is one embodiment of the coarse material cooling device according to the present invention, is a high-temperature cast coarse material formed by the mold 1 including the fixed mold 2 and the movable mold 3. 6 is a coarse material cooling device 10 for cooling the cast raw material 6 in a state where the cast coarse material 6 is restrained by the movable mold 3 after the mold 1 is opened.
According to this, the movable die 3 serves as a heat escape place from a portion where the cooling rate is slow, such as a thick portion of the cast coarse material 6, and the movable die 3 keeps the location where the cast coarse material 6 is fast cooled. It will be. In this way, the casting coarse material 6 and the movable mold 3 can exchange heat with each other to promote uniform cooling rate of the casting coarse material 6.
Therefore, local partial deformation of the cast coarse material 6 due to the variation in the cooling rate can be suppressed, and the dimensional accuracy of the cast coarse material 6 can be improved.
Further, since the cast coarse material 6 can be sufficiently cooled by the external cooling by the coarse material cooling device 10, the cooling structure to the cast coarse material 6 from the inside of the mold 1 can be simplified.

Further, by cooling the cast coarse material 6 in a state where the cast coarse material 6 is restrained by the movable die 3 in this way, the movable die 3 can be cooled via the cast coarse material 6.
Accordingly, partial overheating of the movable mold 3 can be prevented and the residual thermal stress of the movable mold 3 can be reduced, so that the mold life can be extended.
Further, the movable mold 3 is cooled through the casting coarse material 6 in this way, and in particular, the surface temperature of the movable mold 3 can be lowered, so that the Leidenfrost phenomenon at the time of applying the release agent in the molding process of the next cycle can be reduced. Since the adhesion of the mold release agent to the surface of the movable mold 3 can be promoted while preventing the mold release resistance when the cast coarse material 6 is released from the movable mold 3, the mold release resistance can be reduced. While the deterioration of the resulting precision can be prevented and the seizure of the cast coarse material 6 can be suppressed, the loss of the material related to the molding failure can be reduced.

  Below, with reference to FIG. 2, the coarse material cooling device 10 which concerns on this embodiment is demonstrated in detail.

  As shown in FIG. 2, a plurality of coarse material cooling devices 10 are provided, each having a pipe 12, a nozzle 13, and the like. That is, in the present embodiment, a plurality of coarse material cooling devices 10, 10... Are provided with a plurality of nozzles 13, 13. And these nozzles 13,13 ... are each arrange | positioned in the specific part A * A ... vicinity of the casting rough material 6, and are the structure which cools these specific part A * A ... intensively. is there.

Here, the specific portion A is a part of the cast coarse material 6 determined in advance by experiments, computer simulations, and the like, and when the cast coarse material 6 is released from the movable mold 3, the specific portion A is equal to or higher than the recrystallization temperature of the cast coarse material 6. (In this embodiment, since an aluminum alloy is used as a molding material, the recrystallization temperature of the cast coarse material 6 is about 300 ° C.). In other words, the specific portion A is a portion that is equal to or higher than the recrystallization temperature of the aluminum alloy and is easily deformed and contracted after the cast coarse material 6 is released.
In the present embodiment, the specific portions A, A... Are equal to or higher than the recrystallization temperature of the aluminum alloy used as the molding material of the cast coarse material 6 when the cast coarse material 6 is released from the movable mold 3. Although it is a part, when other molding materials such as iron are used, the present invention is not limited to this part, and when the cast coarse material 6 is released from the movable mold 3, the recrystallization temperature of each molding material is exceeded. Any part can be used.

As shown in FIG. 2, a plurality of the coarse material cooling devices 10 configured as described above may be provided, and the specific portions A, A,... Of the cast coarse material 6 can be efficiently cooled. If so, the number of arrangements is not limited. Further, as shown in FIG. 3, a plurality of pipes 12 and nozzles 13 are connected to the storage tank with respect to one coarse material cooling device 10, and a plurality of nozzles 13, 13,. It is good also as a structure.
Further, the arrangement positions of the coarse material cooling devices 10... (Or nozzles 13, 13...) Are not particularly limited, and specific portions A, A. Any position that can be efficiently cooled may be used.
Furthermore, in the present embodiment, water is used as a cooling medium for cooling the coarse material, but the present invention is not limited to this, and liquids such as air and cold air, etc., shower water, and mist-like water are used. It may be a powder such as sand or the like as long as it can cool the specific parts A, A... Of the cast coarse material 6 efficiently, and these cooling media may be used selectively.

As described above, the coarse material cooling device 10 according to the present embodiment of the coarse material cooling device of the present invention releases the cast coarse material 6 from the movable mold 3 and recrystallizes the cast coarse material 6 at the recrystallization temperature (this time). In the embodiment, the specific portions A, A,...
According to this, after the casting coarse material 6 is released from the movable mold 3, deformation shrinkage of the casting coarse material 6 that is likely to occur in a portion of the casting coarse material 6 at or above the recrystallization temperature (about 300 ° C. in the present embodiment). And the dimensional accuracy of the cast coarse material 6 can be improved. As a result, the dimensional accuracy of the product can be improved.

Below, with reference to FIG. 4, the coarse material cooling device 20 which is other embodiment of the coarse material cooling device which concerns on this invention is demonstrated. As shown in FIG. 4, the coarse material cooling device 20 further includes a control device 21 and a temperature sensor 22 in addition to the pipes 12, 12..., The nozzles 13, 13.
The control device 21 is connected to the coarse material cooling device 20 and controls the coarse material cooling device 20. Specifically, the cooling points B, B..., The cooling time, etc. by the coarse material cooling device 20 are controlled.
The temperature sensor 22 is configured by thermography and is connected to the control device 21. The temperature sensor 22 detects the temperature distribution on the surface of the cast coarse material 6, and the detected temperature distribution data is transferred to the control device 21.

  In addition, the control device 21 stores a predetermined set temperature. This set temperature is a temperature that is equal to or higher than the recrystallization temperature of the cast coarse material 6 (about 300 ° C. in this embodiment) when the cast coarse material 6 is released from the movable mold 3. That is, the “set temperature” refers to the recrystallization temperature (300 in the present embodiment) between the opening of the mold 1 and the release of the cast coarse material 6 when there is no cooling by the coarse material cooling device 20. It is the temperature at the time of mold opening in a portion that does not become less than about ° C.

Based on the temperature distribution detected by the temperature sensor 22, the control device 21 defines a location that is equal to or higher than the set temperature as a cooling location B • B... The coarse material cooling device 20 is controlled to cool.
Specifically, the control device 21 changes the inclination of the pipes 12, 12... By operating an actuator (not shown) and the like, and the nozzle 13 is placed at an appropriate position near the cooling points B, B. -It is the structure which changes the arrangement position of 13 ....

As described above, the coarse material cooling device 20 according to the embodiment of the coarse material cooling device of the present invention detects the control device 21 that controls the coarse material cooling device 20 and the surface temperature distribution of the cast coarse material 6. A temperature sensor 22 made of thermography, and the control device 21 sets the temperature of the cast coarse material 6 based on the surface temperature distribution of the cast coarse material 6 detected by the temperature sensor 22. The above cooling points B, B,... Are extracted, the coarse material cooling device 20 is controlled so as to intensively cool the cooling points B, B,. The arrangement position is controlled.
This makes it possible to intensively cool the optimal cooling points B, B... In the cast coarse material 6, and can promote uniform temperature distribution of the cast coarse material 6. 6 can improve the flexibility of the coarse material cooling device 20 with respect to heat transfer and the like that are difficult to predict in the interior.

Further, in the present embodiment, the control device 21 is based on the temperature distribution of the cast coarse material 6 detected by the temperature sensor 22, and the entire surface temperature of the cast coarse material 6 is stored in advance in the control device 21. The coarse material cooling device 20 is operated until it becomes lower than the recrystallization temperature (about 300 ° C. in this embodiment).
According to this, the entire cast coarse material 6 can be surely brought to a temperature lower than the recrystallization temperature (about 300 ° C. in the present embodiment) by releasing the cast coarse material 6 from the movable die 3. It is possible to reliably prevent deformation and shrinkage of the cast coarse material 6 after releasing the cast coarse material 6.

Below, with reference to FIG. 5, the coarse material cooling device 30 which is other embodiment of the coarse material cooling device which concerns on this invention is demonstrated.
As shown in FIG. 5, in this embodiment, the coarse material cooling device 30 includes the pipes 12, 12... And the nozzles 13, 13. Are disposed in the vicinity of the thick portions C, C,... Of the coarse material, and the cooling medium is sprayed from the nozzles 13, 13,. It is the structure which raises the cooling degree of meat part C * C ... from other parts, and cools these thick part C * C ... intensively.

  Here, the thick-walled portion C is a portion that can be specified in advance by the shape of the cast coarse material 6 formed by the mold 1 or a design portion of the cast coarse material 6 and is compared when the cast coarse material 6 is cooled. This is a time-consuming part.

As described above, the coarse material cooling device 30 according to the embodiment of the coarse material cooling device of the present invention makes the cooling degree of the thick portions C, C. Thus, the thick-walled parts C, C,... Are intensively cooled.
According to this, since the temperature can be lowered by intensively cooling the thick-walled portions C, C... That are likely to become high temperature when released from the movable mold 3, the thick-walled portions C -It can prevent that the residual heat of C ... is transmitted to the other site | part of the cast rough material 6. FIG. Moreover, deformation shrinkage in the entire cast coarse material 6 can be suppressed, and the dimensional accuracy of the cast coarse material 6 can be improved. As a result, the dimensional accuracy of the product can be improved. In addition, the other parts of the cast coarse material 6 are cooled by heat transfer from the thick parts C, C,. The uniform cooling rate of the cast coarse material 6 can be promoted.

Below, with reference to FIG. 6, the coarse material cooling device 40 which is other embodiment of the coarse material cooling device which concerns on this invention is demonstrated.
As shown in FIG. 6, in this embodiment, the coarse material cooling device 40 is provided in a take-out robot 41 which is an embodiment of the robot for taking out the coarse material of the present invention. The take-out robot 41 is a device that removes the cast coarse material 6 formed by the mold 1 from the movable mold 3, and includes a robot arm 42, a robot hand 43, and the like. The robot arm 42 is configured by a known articulated robot arm or the like, and the robot hand 43 is configured by a known articulated robot hand or the like, and each is controlled by a control device (not shown). It is operated by.
In the take-out robot 41 configured as described above, the position of the robot hand 43 is moved by the movement of the robot arm 42 (more precisely, an actuator such as a motor provided in the robot arm 42 is operated). The cast coarse material 6 is grasped or sandwiched by the robot hand 43 in accordance with the take-out position.

As shown in FIG. 6, the take-out robot 41 includes a coarse material cooling device 40 in the robot hand 43 (or the tip of the robot arm 42). This coarse material cooling device 40 includes pipes 12, 12..., Nozzles 13, 13. These configurations are as described above, and a description thereof is omitted here.
As described above, the number and position of the coarse material cooling device 40 and the pipes 12 and nozzles 13 provided in the coarse material cooling device 40 may be positions that do not hinder the removal of the cast coarse material 6 by the take-out robot 41. What is necessary is just to be able to cool the cast coarse material 6 efficiently.
Moreover, about cooling by the coarse material cooling device 40 in the cast coarse material 6, when specifying specific part A * A ... beforehand by experiment etc. like this embodiment shown in FIG. 6, or coarse material cooling As described above, the apparatus 40 further includes the control device 21 and the temperature sensor 22, and when the cooling points B, B,... Are extracted, or the thick portions C, C,. Any case may be sufficient.
And the position which can cool well the specific part A * A ... (or extracted cooling location B * B ..., thick part C * C ...) each identified in this way .., And the robot arm 42 is operated so as to arrange the nozzles 13...

As described above, the coarse material cooling device 40, which is one embodiment of the coarse material cooling device of the present invention, is the tip of the robot arm 42 of the take-out robot 41 that takes out the cast coarse material 6 from the movable mold 3 or the robot hand 43. It is provided in the part.
According to this, since the removal process of the cast coarse material 6 and the cooling process of the cast coarse material 6 are performed in the same process, the cycle time of the entire product manufacturing process can be shortened. In addition, since the existing pick-up robot is easily realized by providing the coarse material cooling device 40, the pipe 12, the nozzle 13, and the like, the capital investment required for realizing the coarse material cooling device 40 according to the present embodiment is reduced. Less is enough.

Below, with reference to FIG.7 and FIG.8, the shaping | molding process 100 which shape | molds the cast coarse material 6 using the metal mold | die 1 and the coarse material cooling device 10 which concern on this embodiment is demonstrated.
As shown in FIG. 7, the molding process 100 includes a release agent application process 110, a coarse material molding process 120, a coarse material cooling process 130, a mold release process 140, and the like.

The release agent application step 110 is a step of applying a release agent to the surface of the molding surface of the mold.
In the release agent application step 110, as shown in FIG. 8A, the release agent is sprayed on the molding surfaces of the fixed mold 2 and the movable mold 3 by an appropriate application device 111 having a spray nozzle or the like. Apply release agent. At this time, the applied release agent has a function of cooling the surfaces (molding surfaces) of the fixed mold 2 and the movable mold 3 and reducing the mold release resistance in the subsequent mold release process 140. After applying the release agent to the molding surface, the process proceeds to the rough material molding step 120.

The coarse material forming step 120 is a step of forming the coarse material by pouring molten metal into the mold cavity that has been clamped and solidifying the molten metal.
In the coarse material forming step 120, as shown in FIG. 8 (b), the movable mold 3 is advanced to the fixed mold 2 side, the mold 1 is brought into a clamped state, and the clamped fixed mold 2 and the movable mold are moved. The cast aluminum 6 having the shape of the cavity 4 is formed by injecting molten aluminum 5 into the cavity 4 formed between the two and solidifying it. At this time, the molten aluminum 5 is heated to about 700 ° C. and poured in a molten state, cooled by the mold 1, and gradually cooled to about 650 ° C. which is the melting point of the aluminum alloy. Then, after being left for a predetermined time, the movable mold 3 is retracted from the fixed mold 2, the mold 1 is opened, and the process proceeds to the coarse material cooling step 130.

The coarse material cooling step 130 is an embodiment of the coarse material cooling method of the present invention, and is a step of cooling the coarse material formed by the mold after the mold is opened. In the coarse material cooling step 130, after the mold is opened, the coarse material is cooled in a state where the coarse material is constrained by the mold (movable mold), so that the mold (movable mold) and the coarse material are separated. It is a process of cooling all of them.
In the coarse material cooling step 130, as shown in FIG. 8C, the coarse material cooling device 10 (or the coarse material cooling device 20, the coarse material cooling device 30) in a state where the cast coarse material 6 is restrained by the movable mold 3. The cast coarse material 6 is cooled by the coarse material cooling device 40). That is, in the coarse material cooling step 130, the cast coarse material 6 is cooled before the cast coarse material 6 is released from the movable die 3, so that the movable die 3 in contact with the cast coarse material 6 is obtained. Both are cooled. After the cast coarse material 6 is cooled for a predetermined time by the coarse material cooling device 10 (or the coarse material cooling device 20, the coarse material cooling device 30, and the coarse material cooling device 40), the process proceeds to the mold release step 140.

As described above, in the coarse material cooling step 130, when cooling is performed using the coarse material cooling device 10, as described above, the high temperature state molded by the mold 1 including the fixed mold 2 and the movable mold 3 is used. A coarse material cooling device 10 for cooling the cast coarse material 6, which cools the cast coarse material 6 in a state where the cast coarse material 6 is restrained by the movable mold 3 after the mold 1 is opened. Further, when the cast coarse material 6 is released from the movable mold 3, the specific portions A, A,... That are higher than the recrystallization temperature (about 300 ° C.) of the cast coarse material 6 are intensively cooled. . According to this, after the casting coarse material 6 is released from the movable mold 3, deformation shrinkage of the casting coarse material 6 that is likely to occur in a portion of the casting coarse material 6 at or above the recrystallization temperature (about 300 ° C. in the present embodiment). And the dimensional accuracy of the cast coarse material 6 can be improved. As a result, the dimensional accuracy of the product can be improved.
Further, in the coarse material cooling step 130, when cooling is performed using the coarse material cooling device 20, the control device 21 that controls the coarse material cooling device 20 and the surface temperature distribution of the cast coarse material 6 are detected as described above. A temperature sensor 22 made of thermography, and the control device 21 sets the temperature of the cast coarse material 6 in advance based on the surface temperature distribution of the cast coarse material 6 detected by the temperature sensor 22. The coarse material cooling device 20 is controlled so as to intensively cool the cooling points B, B... Above the temperature. This makes it possible to intensively cool the optimal cooling points B, B... In the cast coarse material 6, and can promote uniform temperature distribution of the cast coarse material 6. 6 can improve the flexibility of the coarse material cooling device 20 with respect to heat transfer and the like that are difficult to predict in the interior.
Further, in the coarse material cooling step 130, when the coarse material cooling device 30 is used for cooling, as described above, the thickness of the thick portions C, C,... The parts C, C... Are cooled intensively. According to this, since the temperature can be lowered by intensively cooling the thick-walled portions C, C... That are likely to become high temperature when released from the movable mold 3, the thick-walled portions C -It can prevent that the residual heat of C ... is transmitted to the other site | part of the cast rough material 6. FIG. Moreover, deformation shrinkage in the entire cast coarse material 6 can be suppressed, and the dimensional accuracy of the cast coarse material 6 can be improved. As a result, the dimensional accuracy of the product can be improved. In addition, the other parts of the cast coarse material 6 are cooled by heat transfer from the thick parts C, C,. The uniform cooling rate of the cast coarse material 6 can be promoted.
In the coarse material cooling step 130, when the coarse material cooler 40 is used for cooling, the coarse material cooler 40 takes the robot arm of the take-out robot 41 that takes out the cast coarse material 6 from the movable mold 3 as described above. 42 or the robot hand 43 portion. According to this, since it can be easily realized by providing the coarse material cooling device 40 in an existing take-out robot, the capital investment required for realizing the coarse material cooling device 40 according to the present embodiment can be reduced.

The mold release process 140 is a process of removing the coarse material from the movable mold.
In the release step 140, as shown in FIG. 8D, the cast coarse material 6 is taken out from the movable die 3 and released by an appropriate take-out device 141 having a robot arm, a robot hand, and the like. The cast coarse material 6 after being released from the movable mold 3 is sent to a lower process such as a machining process by an appropriate conveying device or the like.
In the coarse material cooling step 130, when the coarse material cooling device 40 is used for cooling, the coarse material cooling step 130 and the mold release step 140 are performed simultaneously as described above. According to this, since the mold release process 140 that is a process of taking out the cast coarse material 6 and the coarse material cooling process 130 that is a cooling process of the cast coarse material 6 are performed in the same process, the entire product manufacturing process is performed. Cycle time can be shortened.

As described above, the coarse material cooling step 130, which is an embodiment of the coarse material cooling method according to the present invention, included in the method of forming the coarse material according to the present invention, includes the fixed mold 2, the movable mold 3, and the like. A raw material cooling method 130 for cooling the high-temperature cast coarse material 6 formed by the mold 1 comprising the mold 1 and the cast coarse material 6 being constrained by the movable die 3 after the mold 1 is opened. The casting raw material 6 is cooled.
According to this, the movable die 3 serves as a heat escape place from a portion where the cooling rate is slow, such as a thick portion of the cast coarse material 6, and the movable die 3 keeps the location where the cast coarse material 6 is fast cooled. It will be. In this way, the casting coarse material 6 and the movable mold 3 can exchange heat with each other to promote uniform cooling rate of the casting coarse material 6.
Therefore, local partial deformation of the cast coarse material 6 due to the variation in the cooling rate can be suppressed, and the dimensional accuracy of the cast coarse material 6 can be improved.
Moreover, since it becomes possible to cool the casting coarse material 6 sufficiently by the external cooling by the coarse material cooling device 10 (or the coarse material cooling device 20, the coarse material cooling device 30, and the coarse material cooling device 40), the gold The cooling structure from the inside of the mold 1 to the cast coarse material 6 can be simplified.

Further, by cooling the cast coarse material 6 in a state where the cast coarse material 6 is restrained by the movable die 3 in this way, the movable die 3 can be cooled via the cast coarse material 6.
Accordingly, partial overheating of the movable mold 3 can be prevented and the residual thermal stress of the movable mold 3 can be reduced, so that the mold life can be extended.
Furthermore, by cooling the movable mold 3 through the cast coarse material 6 in this way, and in particular, the surface temperature of the movable mold 3 can be lowered, the Leidenfrost phenomenon at the time of applying the release agent in the molding process of the next cycle Since the adhesion of the mold release agent to the surface of the movable mold 3 can be promoted while preventing the mold release resistance when the cast coarse material 6 is released from the movable mold 3, the mold release resistance can be reduced. While the deterioration of the resulting precision can be prevented and the seizure of the cast coarse material 6 can be suppressed, the loss of the material related to the molding failure can be reduced.

It is a schematic diagram which shows one Embodiment of the metal mold | die which concerns on this invention. It is a schematic diagram which shows one Embodiment of the coarse material cooling device which concerns on this invention. It is a schematic diagram which shows one Embodiment of the coarse material cooling device which concerns on this invention. It is a schematic diagram which shows one Embodiment of the coarse material cooling device which concerns on this invention. It is a schematic diagram which shows one Embodiment of the coarse material cooling device which concerns on this invention. It is a schematic diagram which shows one Embodiment of the coarse material cooling device which concerns on this invention. It is a flowchart which shows one Embodiment of the coarse material cooling method which concerns on this invention. It is a schematic diagram which shows one Embodiment of shaping | molding by the metal mold | die which concerns on this invention.

1 Mold 2 Fixed mold 3 Movable mold 6 Casting rough material (rough material)
10, 20, 30, 40 Coarse material cooling device 100 Molding process 130 Coarse material cooling process (coarse material cooling method)

Claims (4)

A coarse material cooling device for cooling a high temperature coarse material formed by a mold composed of a fixed mold and a movable mold,
After the mold is opened, the coarse material is cooled in a state where the coarse material is restrained by the movable mold,
A coarse material cooling device that intensively cools a portion that does not become less than the recrystallization temperature after the mold is opened and before the coarse material is released when the coarse material is not cooled. The coarse material cooling device includes:
A nozzle for jetting a cooling medium to the coarse material;
A temperature sensor for detecting a temperature distribution of the rough material;
Based on the temperature distribution detected by the temperature sensor, when there is no cooling to the rough material, the part that does not become less than the recrystallization temperature after the mold is opened and before the rough material is released is extracted. The coarse material cooling device according to claim 1, further comprising: a control device that controls the nozzle so as to eject a cooling medium to the extracted portion . The coarse material cooling device according to claim 1, wherein the coarse material cooling device is provided in a robot that takes out the coarse material from the movable mold . A coarse material cooling method for cooling a high temperature coarse material formed by a mold composed of a fixed mold and a movable mold,
After the mold is opened, the coarse material is cooled in a state where the coarse material is restrained by the movable mold,
A method for cooling a coarse material, in which, in the absence of cooling to the coarse material, a portion that does not become less than the recrystallization temperature after the mold is opened until the coarse material is released is intensively cooled .

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