JP4601489B2 - Vibration solidification casting mold and casting method thereof - Google Patents

Description

  The present invention relates to a vibration solidification casting mold and a casting method thereof, and in particular, when casting a casting product made of an aluminum alloy or the like, the vibration solidification capable of refining the metal structure and reducing the result of the cast hole. The present invention relates to a casting mold and a casting method thereof.

  Conventionally, casting of an aluminum alloy has been performed by filling a molten aluminum alloy melted at a high temperature into a cavity of a mold (such as a mold or a sand mold) and solidifying from a liquid phase to a solid phase. ing. Here, when solidifying molten metal melted at a high temperature, in order to prevent defects such as “hot cracks” and “nests” from concentrating during the cooling process, the cast product was made as fine as possible. Attempts have been made to make macro crystal grains. Attempts have also been made to reduce mechanical properties such as strength and pressure resistance of cast products, or to prevent defects in the mold that cause unevenness on the processed surface. In general, the size range of macro crystal grains that can be observed under an optical microscope is generally recognized.

  Here, when casting an aluminum alloy, there are three methods for refining the metal structure into macro crystal grains: 1) quenching treatment, 2) addition of a finer, and 3) vibration treatment. It has been known for a long time (see Non-Patent Document 1). 1) Although the rapid cooling treatment can be carried out relatively easily, the entire cast product is not uniformly refined due to differences in the thickness of each part with respect to the product shape in each cast product. Sometimes. On the other hand, the addition process of 2) a refiner can be ensured by introducing a crystal grain refiner into the molten metal.

  However, injecting a predetermined ratio of the fine agent to all casting products increases the cost of the fine agent and complicated processes such as input work. Therefore, 3) a vibration processing technique is expected for a technique for refining macro crystal grains, assuming that the structure is formed with a relatively simple configuration and the increase in manufacturing cost is not so large. Here, what casts a casting product having a relatively simple shape such as an ingot by applying vibration to the mold has already been disclosed. It is described that it has an effect in preventing the casting defect of “crack” caused by the above (see, for example, Patent Document 1 and Patent Document 2).

  Furthermore, in order to reduce the defects in the cast holes that occur in the casting products, 1) the product shape, the position of the feeder or the weir, the size, etc. are arranged appropriately and the directivity in the solidification direction is considered, or the molten metal is configured It is mentioned to appropriately manage the composition of the alloy or the component ratio of impurities contained in the molten metal.

Japanese Patent Laid-Open No. 10-156505 JP 2003-136190 A Edited by Kazuo Katori and Kazunori Kobayashi, “Casting on the spot”, Agne, 1969, p69

  However, in the vibration processing method described above, vibrations having a relatively high frequency such as ultrasonic vibrations and electromagnetic vibrations are often applied. In addition, with simple vibration only, the macro-crystal grains are not sufficiently refined, and an inoculum such as alumina or carbon is embedded in the mold, and a synergistic effect using both of these actions is utilized. It has been practiced to refine the macrocrystal grains of the metal structure. Accordingly, the cost of the inoculating agent to be embedded is required in the same manner as the addition treatment of the fine agent in 2), which may lead to an increase in production cost. In addition, all casting products cast with vibrations have a simple shape such as an ingot, and are not suitable for casting a casting product having a complicated shape.

  Further, in the case of a cast product formed by adding the above-described finer agent, a problem may occur when the cast product is reused (recycled). That is, the process of removing the micronizing agent mixed in the casting product again has a high degree of difficulty. This process requires time and cost, and the recycling itself may be complicated. For this reason, it has been demanded that such a micronizing agent is not used as much as possible.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a vibration solidification casting mold and a casting method thereof that can vibrate the mold and refine the macro crystal grains.

In order to solve the above-mentioned problems, the vibration solidification casting mold of the present invention has a "cavity filled with a molten aluminum alloy, and is in contact with the vibration mold formed so as to be separable from each other. A mold body having a fixed mold and the mold body opposite to the cavity mounted on the outer surface of the mold of the vibration mold, while the molten metal filled in the cavity is solidified to cast a cast product, buffer support portion for supporting the vibrating of the mold body while buffering vibrations donated by a vibration means for vibrating the vibratory, before Symbol vibrating means, and a fixed support for supporting the fixed mold of the mold body And a mold support part that supports the vibration mold and the fixed mold of the mold body that are separably formed so as to be openable and closable ”.

  Here, the vibration means is, for example, a ball vibrator that uses a compressed air pressure to rotate a metal ball filled in a circular inner space at a high speed to generate vibration associated with centrifugal force, or An electromagnetic vibration element or the like that can generate vibration electromagnetically can be used. Among these, the ball vibrator has a relatively compact and simple structure, and the generated frequency can be arbitrarily changed by appropriately adjusting the air pressure. The ball vibrator is generally used as a vibration source for transporting, filling, and sorting powders and solids, or a vibration source for eliminating clogging in the transport pipe.

  Further, the molten metal is a metal or metal alloy melted at a high temperature, and becomes a raw material when casting a cast product or the like. In addition, although the metal seed | species used for a molten metal and an alloy seed | species are not specifically limited, For example, various metals or alloys etc. which can be conventionally used for casting products, such as pure aluminum, aluminum alloy, magnesium, and aluminum-copper alloy, are object Is possible. Here, it is possible to use a molten metal that does not contain a crystal grain refining agent such as titanium, boron, and zirconium.

  Therefore, according to the vibration solidification casting mold of the present invention, vibration means for separating the mold into at least two parts by the mold support portion and applying vibration to the mold body supported so that the cavity can be opened and closed is installed. Accordingly, after the cavity is filled with the molten metal, the switch of the vibration means is operated to vibrate the mold body. As a result, in the situation of phase transition from the liquid phase to the solid phase, by applying vibration (any value from low frequency to high frequency), the uneven load related to the liquid phase and the solid phase is eliminated, and the load is evenly loaded. It is possible to proceed with solidification in a dispersed state. As a result, the solidification change from the liquid phase to the solid phase proceeds rapidly, and it becomes possible to refine the macro crystal grains of the metal structure. The vibration to be applied can be changed greatly depending on the type and performance of the vibration means (ball vibrator, etc.) or the mounting method of the vibration means, and the frequency in a wide range from the low frequency range to the high frequency range can be arbitrarily set. Can be set.

  Here, the buffer support portion having the buffer means is capable of supporting, for example, the vibration of the mold body by the vibration means while buffering, for example, a connection portion for connecting the mold body and the buffer support portion. A part or all of this can be formed of an elastic body such as a spring or rubber that can be elastically deformed, and can support a part of the mold body in a state where the vibration by the vibration means is buffered.

  Therefore, in the vibration solidification casting mold of the present invention, the mold support portion has the fixed support portion and the buffer support portion, and can be supported while buffering the vibration of the mold body by the buffer means such as the spring of the buffer support portion. Therefore, for example, when the mold body is formed so as to be separable into two parts and the mold body is in a closed state to form a cavity filled with molten metal, the mold body is moved by the buffer means (buffer support part). It is possible to avoid a situation where the molds are separated from each other. Thereby, the micro crystal grains can be made finer by vibration, and the shape of the cavity filled with the molten metal (the mold closed state of the mold body) can be maintained. Furthermore, the shock when the vibration direction changes is reduced by the buffer means, and the solidification of the molten metal is not adversely affected (such as rippling of the liquid phase surface).

  Therefore, according to the vibration solidification casting mold of the present invention, the vibration means is mounted on the outer surface of the mold body of the mold body facing the cavity. That is, the vibration means is provided in the vicinity of a cast product formed by solidification of the molten metal. Thereby, the vibration of the vibration means is reliably transmitted to the molten metal. As a result, the refinement of macro crystal grains by vibrating the molten metal proceeds promptly.

On the other hand, casting according to the present invention, "mold with a casting method utilizing vibration solidification casting mold described above, the vibration type and the vibratory and abutting the fixed mold are separable to each other A molten metal filling step of filling a cavity inside the main body with a molten aluminum alloy melted at a high temperature; a casting step of casting a cast product by cooling and solidifying the molten metal filled in the cavity; and A vibration providing step of applying vibration to the mold body using vibration means installed on the outer surface of the vibration mold of the mold body in the course of solidification of the molten metal in the casting process. It is mainly composed of things.

  Therefore, according to the casting method of the present invention, after the filling of the molten metal into the cavity is completed, the mold body is vibrated using the vibration means. At this time, the filled molten metal is gradually cooled immediately after completion of filling, and phase transition from the liquid phase to the solid phase is started. Therefore, when the vibration is given in such a phase transition state, the liquid phase molten metal is greatly affected by the vibration, and the solidification of the metal structure proceeds in a state (uniform state) in which unnecessary loads related to solidification are dispersed. To do. As a result, the macro crystal grains can be miniaturized.

  On the other hand, the casting method according to the present invention includes, in addition to the above-described configuration, “in the vibration donating step, after the filling of the molten metal into the cavity is completed by the molten metal filling step, the solid phase ratio of the molten metal is 50%. The above-mentioned vibration may be continued until the above is occupied.

  Therefore, according to the casting method of the present invention, the supply of vibration to the mold body in the vibration supplying step is continued until the solid phase ratio of the molten metal reaches 50% or more. Here, as described above, the phase transition from the liquid phase to the solid phase is started immediately after the filling of the molten metal into the cavity. At this time, immediately after the filling of the molten metal is completed, the liquid phase region dominates (solid phase ratio = almost 0%). Therefore, it is possible for the melt in the liquid phase to sufficiently receive the vibration provided by the vibration providing step. On the other hand, in a state where the liquid phase completely transitions to the solid phase (solidification state: solid phase ratio = 100%), even if vibration is provided by the vibration providing step, the casting is made of the solid phase. Will not receive. In other words, it is meaningless to give vibration after solidification has completely progressed and the cast product has been cast. Therefore, vibration is provided by the vibration providing step until the solid phase ratio reaches 50% or more, and thereafter, it is determined that no significant effect is obtained even if the vibration is supplied, and the subsequent vibration is stopped. Thereby, the mold body is not vigorously vibrated by adjusting the timing of vibration using the vibration means. The solid fraction can be calculated based on a time-temperature cooling curve measured for each metal or alloy. Therefore, the vibration solidification casting mold of the present invention includes a time measurement means such as a timer for measuring time, and a temperature sensor capable of measuring the temperatures of a plurality of locations (for example, a feeder part, a cavity, etc.) of the mold body. It is also possible to provide temperature measurement means, calculate the solid phase ratio based on the above-described cooling curve, and determine whether to continue or stop the provision of vibration.

  As an effect of the present invention, vibration means is used to vibrate the mold body, and vibration is applied during the phase transition from the liquid phase to the solid phase that occurs immediately after the completion of the filling of the molten metal, so that the macro crystal grains are refined. be able to. As a result, the metal structure becomes finer and uniformly distributed. Furthermore, it is excellent in mechanical properties, and does not cause defects in the casting hole such as “hot cracking” and “nest”, so that a stable casting product can be cast.

  Hereinafter, a vibration solidification casting mold 1 (hereinafter simply referred to as “mold 1”) and a method 2 for manufacturing the same according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is an explanatory view schematically showing an example of the structure of the mold 1 and a cast product 9 to be cast according to this embodiment, and FIG. 2 shows the flow of each process of the casting method 2 using the mold 1. FIG. 3 is a graph showing the relationship between the vibration conditions and macro crystal grains, FIG. 4 is a graph showing the relationship between the vibration conditions and the size of the microstructure, and FIG. 5 is the relationship between the vibration conditions and the specific gravity value. It is a graph which shows. In the present embodiment, the mold 1 is used to cast a cast product 9 made of an aluminum alloy by a gravity casting method. Further, in order to examine changes in the size of the microstructure of each part based on vibration conditions described later, a test piece as shown in FIG.

  As shown mainly in FIG. 1, a mold body 1 of the present embodiment includes a vibration mold 3 that is separable from each other and a mold body 5 that includes a fixed mold 4 that is in contact with the vibration mold 3. A vibrator 7 made of a ball vibrator installed on the outer mold surface 6 on the vibration mold 3 side of the mold body 5 and a mold support portion 8 that supports the vibration mold 3 and the fixed mold 4 of the mold body 5 so as to be freely opened and closed. It is mainly composed. A mold opening / closing mechanism (not shown) formed by an air cylinder, a hydraulic cylinder, or the like for allowing the vibration mold 3 and the fixed mold 4 of the mold body 5 to be opened and closed uses a conventionally known technique and apparatus. The detailed description is omitted here.

  Further, the vibration mold 3 and the fixed mold 4 of the mold body 5 are respectively a cavity 10 engraved in the same shape as the casting product 9 cast therein, and a hot water supply portion 12 for filling the cavity 10 with the molten metal 11. Is formed. In addition, since the molten metal filling mechanism (not shown) for filling the molten metal 11 into the cavity 10 by the gravity casting method via the feeder 12 is already well known, detailed description is omitted here.

  Further, the mold support unit 8 supports the vibration mold 3, supports the vibration provided by the vibrator 7 while buffering the vibration by the buffer spring section 13, and the fixed support section 15 that supports the fixed mold 4. It is equipped with. Here, the buffer spring portion 13 corresponds to the buffer means in the present invention. With such a configuration, even when vibration is applied to the mold body 5 that is clamped by the mold opening and closing mechanism, the buffer body 14 can support the mold body 5 while absorbing the amplitude due to vibration. It becomes like this. As shown in FIG. 1, at least a pair of buffer support portions 14 having buffer spring portions 13 are attached to the vibration mold 3. On the other hand, the fixed support portion 15 firmly supports the mold body 5 to which vibration is applied. As a result, even if the mold body 5 is clamped by the buffer support portion 14 and the fixed support portion 15 and the cavity 10 is filled with the molten metal 11, the vibration die 3 and the fixed die 4 are separated from each other. Can be avoided.

Further, as described above, the vibrator 7 installed on the vibration mold 3 of the mold body 5 causes a steel ball (not shown) to centrifugally move in a circular space at high speed using the air pressure of compressed air. The thing which can obtain a vibration using the centrifugal force which generate | occur | produces with this motion is utilized. Therefore, the magnitude or frequency of vibration provided to the mold body 5 can be arbitrarily changed by changing the strength (supply amount, supply pressure) of the supplied air. Note that the vibration strength or frequency of the compressed air due to the air pressure varies greatly depending on the shape of the cavity 10 engraved in the mold body 5, in other words, the shape of the cast product 9 to be cast. Therefore, it is not possible to specifically limited, for example, in the case of casting products 9 of the shape of the test piece embodiment, the vibration strength of 0.5 kg / cm ² or more, it is set to less than 4.0 kg / cm ² Can do. That is, when the vibration strength is higher than 4.0 kg / cm ² , so-called “surface shrinkage” occurs in the vicinity of the vibrator 7. Further, as shown in the graph of FIG. 5 described later, the effect of improving the specific gravity value may be inferior compared with the above range. On the other hand, when the vibration strength is 0.5 kg / cm ² or less, the macro crystal grains cannot be sufficiently refined, and the effect of vibrating the mold 1 cannot be obtained. Therefore, in the case of the cast product 9 having the above-mentioned shape, it is desirable to set the vibration strength within the range. As shown in FIG. 1, in the present embodiment, the vibrator 7 is disposed so as to be close to the feeder 12 (measurement site D) that is the upper side of the mold body 5 and the upper portion (measurement site C) of the cast product 9. Is installed.

  In this embodiment, the vibrator 7 is provided on the outer surface 6 of the mold facing the cavity 10 carved on the inner surface of the vibration mold 3. Thereby, the vibration generated by the vibrator 7 is transmitted to the molten metal 11 filled in the cavity 10 without loss. Therefore, it is possible to fully enjoy the effects obtained by vibrating the mold body 5.

  Next, a specific example of the casting method 2 using the mold 1 of this embodiment will be described based on the flowchart of FIG. First, a cavity that forms the shape of a casting product 9 to be cast by closely contacting the mold surfaces 3a and 4a of the vibration mold 3 and the fixed mold 4 that are separable from each other using a mold opening / closing mechanism (not shown). 10 is formed inside the mold body 5 (clamping step S1). The mold body 5 that has been clamped is heated to 300 ° C. in advance.

Thereafter, using a molten metal filling mechanism (not shown), the molten metal 11 is poured from the molten metal port 12a of the feeder 12 provided in communication with the cavity 10 of the mold body 5 (molten filling step S2). Here, the molten metal 11 is an aluminum alloy melted at a high temperature and is controlled by a liquid phase (corresponding to a solid phase ratio = 0%). Further, as the molten metal 11, in order to confirm the refinement of the metal structure due to vibration, a melt that does not contain titanium, boron, zirconium, or the like that is usually added as a crystal grain refiner is used. At this time, immediately after the filling of the cavity 10 is completed, the molten metal 11 starts the phase transition (solidification) from the liquid phase to the solid phase, and the phase transition from the liquid phase to the solid phase is completely completed. The molten metal 11 is cast as a cast product 9 (casting step S3).

  Here, in the casting method 2 of the present embodiment, the filling of the molten metal 11 into the cavity 10 is completed by the molten metal filling step S2, and the solidification of the molten metal 11 by the casting step S3 proceeds, so that the vibrator 7 is operated simultaneously. Then, a vibration having a predetermined frequency (see arrow V in FIG. 1) is provided to the mold body 5 (vibration providing step S4). Furthermore, since the vibration mold 3 is supported by the buffer spring portion 13 of the buffer support portion 14 during such vibration, vibration can be performed while buffering the force acting in the horizontal direction. Thereby, the vibration reaches the peak of the amplitude, and the impact when the vibration direction changes is reduced. As a result, the quality of the cast product 9 to be solidified and cast is not adversely affected.

  Thereafter, when the solid phase ratio of the molten metal 11 exceeds 50%, if it is judged from the cooling curve of the aluminum alloy, the supply of vibration to the mold body 5 is stopped (vibration stopping step S5). The determination of the solid phase ratio of 50% is based on the cooling curve in principle, and is comprehensively determined based on the elapsed time measured from the completion of the molten metal filling and the temperature sensor installed in the mold body 5. It does not matter.

  Note that the casting step S3 in which the molten metal 11 is phase-shifted from the liquid phase to the solid phase is continuously performed even after the supply of vibration is stopped. Note that with the change from the liquid phase to the solid phase, the high-temperature molten metal 11 gradually loses heat, and the temperature changes. Thereafter, the solid phase ratio reaches 100%, the phase transition from the liquid phase to the solid phase is completely terminated, and when the casting is completed, the vibrating mold 3 and the stationary mold are used to take out the cast product 9 after casting from the cavity 10. The mold is opened so that 4 are separated from each other (mold opening step S6). Thereby, the cast product 9 cast while giving vibration is completed.

  As described above, according to the mold 1 of this embodiment and the casting method 2 using the mold 1, the mold body 5 in which the cavity 10 is filled with the molten metal 11 is vibrated at a predetermined frequency. It is done. Thereby, generation | occurrence | production of the defect at the time of casting, such as a casting hole defect, can be decreased. In particular, by installing the vibrator 7 for vibrating the mold body 5 on the outer surface 6 of the mold near the cavity 10, the generated vibration can be transmitted to the molten metal 11 without loss. Furthermore, the vibration providing step S4 for applying vibration is continued from the filling of the molten metal 11 until the solid phase ratio becomes 50% or more, so that vibration is effectively applied to the molten metal 11 mainly controlled by the liquid phase. It is possible to avoid the formation of casting hole defects.

Next, the relationship between the vibration condition V1 and the like in the cast product 9 (test piece) cast using the mold 1 of the present embodiment, and the measured macro crystal grain size, microstructure size, and specific gravity value are as follows. The effects of vibration are shown based on the graphs shown (FIGS. 3 to 5). Here, the vibration conditions V1 to V4 in each graph are set as follows.
That is,
V1: No vibration (◆)
V2: with vibrations, vibration timing = 0 s after filling, air pressure = 4.9 kg / cm ² (■)
V3: with vibration, vibration timing = 0 s after filling, air pressure = 3.0 kg / cm ² (●)
V4: With vibration, vibration timing = 5 s after filling, air pressure 4.9 kg / cm ² (▲)
It is.
Thus, by changing the presence / absence of vibration, the timing of starting vibration, and the strength of air pressure, what is the difference in the values of each measurement site A, B, C, D of the test piece (cast product 9) Was observed. Here, the measurement site A is the lower end portion of the test piece, the measurement site B is the center portion of the test piece, the measurement site C is the upper end portion of the test piece, and the measurement site D is the location corresponding to the feeder 12. Note that the vibration timing in the vibration condition V2 and the vibration condition V3 is 0 s after the filling of the molten metal 11, that is, immediately after the filling is completed, the solid phase ratio is about 0%, while the vibration timing in the vibration condition V4 is 5 s after the filling of the molten metal 11. In the state after elapse of time, the solid phase ratio shows about 20%.

  As shown in FIG. 3, when the vibration is given by the vibrator 7 (vibration condition V2 to vibration condition V4), the size of the macro crystal grain does not give vibration at any measurement site A or the like (vibration condition V1). It was observed to be smaller than That is, it was confirmed that the macro crystal grains were refined by the mold 1 of the present embodiment. Specifically, when no vibration is applied, the size of the macro crystal grains is about 500 to 600 μm, while those with vibration show values of 300 to 400 μm. However, in the part corresponding to the measurement part A of the cast product 9, in other words, the part farthest from the molten metal inlet 12a, there was almost no influence of the size of the macro crystal grains due to the presence or absence of vibration. The molten metal 11 that has reached such a site has the longest time until vibration by the vibrator 7 is started (that is, the time until filling is completed), and the phase transition from the liquid phase to the solid phase has already occurred in the molten metal 11. It is likely that it has already begun at the time of filling. Therefore, it was shown that the size of the measurement site A due to the presence or absence of vibration is not so large. Moreover, in FIG. 3, there was almost no difference in the size of the macro crystal grains under the vibration condition V2 and the vibration condition V4. That is, even if the vibration timing is set after 5 seconds have elapsed from completion of filling, a value almost equal to that immediately after completion is shown. This confirms that the effect of vibration is enjoyed even when the solid fraction is about 20%. In addition, by comparing the vibration condition V2 and the vibration condition V3, the larger the air pressure supplied to the vibrator 7, in other words, the stronger the vibration strength, the more the refinement of the macro crystal grains is promoted. It was confirmed. In particular, since the refinement of the metal structure can be promoted even under conditions where no conventional crystal grain refiner is added, the work of adding the crystal grain refiner is omitted and required. Raw material costs can also be reduced.

FIG. 4 is a graph comparing the size (DAS) of the microstructure of the cast product 9 that is cast for each measurement site A and the like. According to this, the DAS size of the measurement part D and the measurement part C close to the vibrator 7 is larger than that of the measurement part A and the measurement part B. Therefore, as in this embodiment, when filling the molten metal 11 from the feeder 12 provided on the upper side, by providing at least one vibrator 7 at a position excluding the feeder 12, The DAS size can be reduced. Furthermore, as shown in FIG. 5, it was shown that the value of specific gravity changes with the difference in air pressure. In particular, the measurement site C, air pressure compared to 3.0 kg / cm ^2, the specific gravity value of 4.9 kg / cm ² was confirmed to be lower. As a result, it was shown that if the vibration strength becomes too high, there is a high possibility of causing a decrease in specific gravity value or “surface shrinkage” due to vibration. Therefore, in the case of the present embodiment, it is considered desirable to reduce the vibration by the vibrator 7 to 4.0 kg / cm ² or less, for example. Note that the vibration strength due to air pressure and the vibration frequency associated therewith greatly depend on the shape of the cast product 9 to be cast and other casting conditions, and the above-described numerical values are merely examples.

  As described above, according to the casting method 2 using the casting mold 1 and the casting mold 1 of the present embodiment, when the molten metal 11 filled in the cavity 10 undergoes a phase transition from the liquid phase to the solid phase, By applying appropriate vibration, the macro crystal grains of the metal structure of the cast product 9 can be refined. Thereby, the quality of the casting product 9 is stabilized. In addition, it is possible to reduce defects such as casting hole defects during casting as much as possible.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, the present invention is not limited to the casting product 9 and the casting conditions shown in the mold 1 and the casting method 2 of the present embodiment. In particular, the vibration strength due to the air pressure giving vibration and the vibration frequency of the mold body 5 vary greatly depending on the shape of the cast product 9 to be cast, and need to be set individually. In addition, in the present embodiment, the vibrator 7 made of a ball vibrator is used as the vibration means for providing vibration. However, the present invention is not limited to this, and the mold main body 5 is electromagnetically or mechanically used. Conventionally known vibration means capable of applying vibration to the head may be used. However, such casting is performed at a high temperature using the molten metal 11 melted at a high temperature, and heat resistance and durability are required. Therefore, the one using a ball vibrator that has been proven in this embodiment and used for powder transportation has higher stability than the one composed of relatively heat-sensitive parts such as electronic equipment. It seems that there is. In the present embodiment, a single vibrator 7 is provided on the mold 1, but the number of vibrators 7 is not limited to one. That is, the vibration of the present invention can be transmitted to the molten metal 11 at all locations in the cavity 10 by attaching a plurality of vibrators 7 to various locations on one mold 1 and simultaneously vibrating the same. Thereby, the whole metal structure of the cast product 9 to be cast is in a state in which the macro crystal grains are refined.

It is explanatory drawing which shows typically an example of the structure of the casting_mold | template of this embodiment, and the cast product cast. It is a flowchart which shows the flow of each process of the casting method using a casting_mold | template. It is a graph which shows the relationship between vibration conditions and a macrocrystal grain. It is a graph which shows the relationship between vibration conditions and a microstructure size. It is a graph which shows the relationship between a vibration condition and specific gravity value.

Explanation of symbols

1 Mold (vibrating solidification casting mold)
2 Casting method of vibration solidification casting mold (casting method)
3 Vibration type 4 Fixed type 5 Mold body 6 Mold outer surface 7 Vibrator (vibration means)
8 Mold support part 9 Cast product 10 Cavity 11 Molten metal 13 Buffer spring part (buffer means)
14 Buffer support part 15 Fixed support part S2 Molten metal filling process S3 Casting process S4 Vibration donating process

Claims (3)

A mold body having a cavity filled with a molten aluminum alloy, a vibration mold formed so as to be separable from each other, and a fixed mold in contact with the vibration mold;
Is To設in the mold outer surface of the vibrating opposing the mold body to the cavity, while solidifying the molten metal filled in the cavity to cast a cast product, vibrating means for vibrating the vibratory When,
Buffer support portion for supporting the vibrating of the mold body while buffering vibrations granted by the previous SL vibrating means, and has a fixed support portion, for supporting the fixed die of the mold body, separably formed A vibration coagulation casting mold, comprising: a mold support portion that supports the vibration mold and the fixed mold of the mold body that can be opened and closed. A casting method using the vibration solidification casting mold according to claim 1,
A molten metal filling step of filling a cavity inside a mold main body having a vibration mold formed so as to be separable from each other and a fixed mold in contact with the vibration mold;
A casting step of casting a cast product by cooling and solidifying the molten metal filled in the cavity;
A vibration providing step of applying vibration to the mold body using vibration means installed on the outer surface of the vibration mold of the mold body in the course of solidification of the molten metal in the casting process. A casting method characterized by that. The vibration donating step includes
The supply of the vibration is continued until the solid phase ratio of the molten metal occupies 50% or more after the filling of the molten metal into the cavity is completed by the molten metal filling step. Casting method.

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