JP4843742B1 - Casting equipment - Google Patents

Abstract

The present invention provides a vacuum casting mold that can maintain a vacuum in a cavity without using seal packing and without increasing the processing accuracy of a divided surface.
A casting apparatus includes a first mold, a second mold, and a release agent. The first mold has a first mold surface and a recess provided at a position away from the edge of the first mold surface by a certain distance or more. The second mold has a second mold surface and is joined to the first mold. The release agent is applied to at least the first mold and the second mold in the inner region surrounded by the concave portion, and is gelled by heating.
[Selection] Figure 4

Description

  Embodiments of the present invention relate to a casting apparatus including a mold that is used by applying a release agent.

  In the case of vacuum casting molten aluminum or an alloy thereof, there is a mold in which a groove surrounding the cavity is provided and a seal packing is mounted in order to decompress the inside of the cavity. A release agent is applied to the inner surface of the cavity in order to make the work easy to separate from the mold. As the mold release agent used at this time, there are known ones that gel when heated to increase the viscosity, and those that are suitable when the casting temperature is high.

JP 2008-149358 A JP-A-11-277211

  In the case of a cavity having a complicated shape, the temperature of the molten metal or the mold may be set high in order to spread the molten metal to every corner. Also, magnesium must be cast at a higher temperature than aluminum. However, since the seal packing used in vacuum casting is used under the casting temperature condition of magnesium, the durability is lowered and the consumable must be frequently replaced. When the degree of vacuum is lowered, the workpiece is oxidized or the molten metal does not flow well in the details. Therefore, it is important to maintain the sealing performance.

  If the sealing temperature cannot be used due to high casting temperature, the sealing accuracy of the cavity may be ensured by improving the alignment accuracy of the divided surfaces and reducing the surface roughness of the divided surfaces of the mold. However, not only does the manufacturing cost of the mold increase, but it must be managed so as not to damage the dividing surface in the manufacturing process.

  Therefore, the present invention provides a casting apparatus that can maintain the vacuum of the cavity without using seal packing and without increasing the processing accuracy of the divided surface.

  The casting apparatus of the embodiment includes a first mold, a second mold, and a release agent. The first mold has a first mold surface and a recess provided at a position away from the edge of the first mold surface by a certain distance or more. The second mold has a second mold surface and is joined to the first mold. The release agent is applied to at least the first mold and the second mold in the inner region surrounded by the concave portion, and is gelled by heating.

The perspective view which shows the 1st metal mold | die of the casting apparatus of 1st Embodiment. The perspective view of the 2nd metal mold | die joined to the 1st metal mold | die shown in FIG. FIG. 3 is a schematic view of a casting apparatus using the vacuum casting mold shown in FIGS. 1 and 2. Sectional drawing of the state which apply | coated the mold release agent to the cavity inner surface of the metal mold | die for vacuum casting shown in FIG. Sectional drawing just before match | combining the 1st metal mold | die and 2nd metal mold | die of the vacuum casting metal mold | die shown in FIG. Sectional drawing of the state which match | combined the 1st metal mold | die shown in FIG. 5, and the 2nd metal mold | die. Sectional drawing of the state which injected the molten metal into the metal mold | die for vacuum casting shown in FIG. The perspective view which shows the 1st metal mold | die of the casting apparatus of 2nd Embodiment. Sectional drawing just before match | combining the 1st metal mold | die and 2nd metal mold | die of the vacuum casting metal mold | die shown in FIG. Sectional drawing of the state which match | combined the 1st metal mold | die shown in FIG. 9, and the 2nd metal mold | die. Sectional drawing of the state which inject | poured the molten metal into the metal mold | die for vacuum casting shown in FIG. The perspective view which shows the 1st metal mold | die of the casting apparatus of 3rd Embodiment.

  A vacuum casting mold 10 according to the first embodiment will be described with reference to FIGS. 1 to 7. The vacuum casting mold 10 includes a first mold 11 as a cavity mold shown in FIG. 1, a second mold 12 as a core mold shown in FIG. 2, and a first mold 11. The formed recessed part 13 and the mold release agent 14 are provided.

  The first mold 11 has a first mold surface 111 as shown in FIG. The first mold surface 111 forms an outer shape on the first side with respect to a dividing line of a product cast by the vacuum casting mold 10. The second mold 12 has a second mold surface 121 as shown in FIG. The second mold surface 121 forms a second side outer shape with respect to the product dividing line. The first mold surface 111 and the second mold surface 121 include injection parts 112 and 122, product parts 113 and 123, and overflow parts 114 and 124, respectively, as shown in FIGS. In addition, the first mold surface 111 and the second mold surface 121 form a cavity C by combining the first mold 11 and the second mold 12 as shown in FIG.

  The injection part 112 is connected to the molten metal supply port 2 of the vacuum casting apparatus 1 shown in FIG. 3, and is supplied with a metal or alloy molten metal M as a product. The product parts 113 and 123 are parts for forming products. The overflow parts 114 and 124 are provided downstream of the product parts 113 and 123 with respect to the injection parts 112 and 122 in the flow of the molten metal M. The overflow portions 114 and 124 are portions necessary for sufficiently spreading the molten metal M to every corner of the product portions 113 and 123.

  The recess 13 is formed in at least one of the first mold 11 and the second mold 12. In the first embodiment, the recess 13 is formed in the first mold 11 as shown in FIG. The concave portion 13 is formed at a position separated by a certain distance along the edges of the first mold surface 111 and the second mold surface 121, and continuously surrounds the outer periphery of the first mold surface 111. That is, when the first mold 11 and the second mold 12 are combined, the recess 13 surrounds the first mold surface 111 and the second mold surface 121. The cross-sectional shape of the recess 13 of the first embodiment is a square as shown in FIGS. However, as long as the same function is satisfied, the cross-sectional shape of the recess 13 may be a semicircular shape, a wedge shape, a trapezoidal shape, etc. in addition to the square shape.

Further, in the case of the first embodiment, as shown in FIG. 2, a convex portion 15 is provided at a position corresponding to the concave portion 13. As shown in FIG. 6, the convex portion 15 is fitted into the concave portion 13 with a gap left between the convex portion 15 and the concave portion 13. The convex portion 15 also has a function of positioning the first mold 11 and the second mold 12 by fitting into the concave portion 13. While the concave portion 13 surrounds the outer periphery of the cavity C, the convex portion 15 may be provided partially. The release agent 14 is made of a material that gels when heated. The mold release agent 14 is applied to an inner region surrounded by at least the recess 13 of the first mold 11 and the second mold 12. In the case of the first embodiment, the second mold 12 is provided with the convex portion 15 at a position corresponding to the concave portion 13, so that it is easy to determine the region where the release agent 14 is to be applied. As shown in FIG. 4, the release agent 14 is formed from the concave portion 13 including the first mold surface 111 and the second mold surface 121 before the first mold 11 and the second mold 12 are combined. Is also applied to the inner area. When the first mold 11 and the second mold 12 in a state where the mold release agent 14 is applied are combined as shown in FIG. 5, the mold release applied to the portion between the cavity C and the recess 13. The agent 14 enters a gap formed between the concave portion 13 and the convex portion 15.

  The vacuum casting mold 10 is heated to a temperature at which the molten metal M can be poured. The release agent 14 is gelled as shown in FIG. 6 when heated. Therefore, the release agent 14 that has entered the gap formed between the concave portion 13 and the convex portion 15 is heated to be gelled to perform the same function as the sealing material, and also when the cavity C is evacuated. Keep airtight. The release agent 14 that has flowed to the cavity C side is pushed away by the molten metal M. 5 and 6, the release agent 14 applied to the cavity C is exaggerated.

  The vacuum casting mold 10 configured as described above is mounted on the vacuum casting apparatus 1 shown in FIG. 3 to vacuum cast a product. The vacuum casting apparatus 1 includes a plunger 3, a molten metal tank 31, a vacuum tank 40, a vacuum pump 4, a suction pipe 102, a valve 103, a release agent recovery machine 5, and a control device 6.

  The plunger 3 pushes the molten metal M into the vacuum casting mold 10 through the molten metal supply port 2 from the molten metal tank 31 that stores the molten metal M. The vacuum tank 40 is connected through a suction pipe 102 to a suction port 101 provided downstream of the overflow portions 114 and 124 of the vacuum casting mold 10. The capacity of the vacuum tank 40 is sufficiently larger than the capacity of the cavity C. The vacuum pump 4 evacuates the connected vacuum tank 40. The valve 103 and the release agent collecting machine 5 are attached in the middle of the suction pipe 102. The release agent recovery machine 5 is a centrifugal cooling device having a filter 51 inside, and separates and recovers the release agent 14 discharged from the vacuum casting mold 10. Since the valve 103 is provided to shut off the cavity C and the vacuum tank 40, the valve 103 is disposed between the vacuum casting mold 10 and the release agent recovery machine 5 or between the release agent recovery machine 5 and the vacuum tank 40. It may be provided in any place. If the volumes of the release agent recovery machine 5 and the suction pipe 102 are not so large, a valve 103 is provided downstream of the release agent recovery machine 5 in order to prevent the release agent 14 discharged from the cavity C from being clogged. Deploy.

  The control device 6 includes a mold thermometer 104 attached to the vacuum casting mold 10, a plunger 3, a molten metal thermometer 32 for measuring the temperature in the molten metal tank 31, a vacuum pump 4, and a pressure attached to the vacuum tank 40. The sensor 41 and the valve 103 are connected to each other. The control device 6 confirms whether the temperatures of the vacuum casting mold 10 and the molten metal M are suitable for vacuum casting with the mold thermometer 104 and the molten metal thermometer 32, and whether the vacuum tank 40 is sufficiently decompressed. Confirm with the pressure sensor 41. When the temperatures of the vacuum casting mold and the molten metal M are out of the set values, the control device 6 adjusts the operating conditions of the attached heater to adjust the temperature conditions. When the pressure in the vacuum tank does not satisfy the target degree of vacuum, the control device 6 operates the vacuum pump 4.

  Next, operation | movement of the vacuum casting by said vacuum casting apparatus 1 is demonstrated. First, as shown in FIG. 4, a release agent 14 is applied to the entire mating surfaces of the first mold 11 and the second mold 12. That is, the mold release agent 14 is uniformly applied not only to the first mold surface 111 and the second mold surface 121 constituting the cavity C, but also to the peripheral region of the cavity C where the concave portions 13 and the convex portions 15 are provided. Apply.

  The first mold 11 and the second mold 12 to which the release agent 14 is applied are put together as shown in FIGS. 5 and 6 and heated. When the temperature of the vacuum casting mold 10 is about 300 ° C., the release agent 14 gels as shown in FIG. Therefore, the release agent 14 that has entered the recess 13 gels to exhibit the same function as the sealing material.

  Thus, even when the casting temperature exceeds the heat resistance temperature of a general sealing material as in the case of vacuum casting using a magnesium alloy as the molten metal M, the sealing property for evacuating the cavity C is ensured. Further, since the release agent 14 is only applied to ensure the sealing performance, even if the shape of the portion where the sealing material is arranged is complicated, the operation is easier than attaching the sealing material separately.

  When the temperature condition is satisfied, the control device 6 opens the valve 103 to make the cavity C communicate with the vacuum tank 40. Since the cavity C is hermetically sealed in the vacuum casting mold 10 by the release agent that has gelled in the recess 13, the pressure inside the cavity C is reduced to a state close to vacuum. When the pressure sensor 41 detects that the internal pressure of the vacuum tank 40 has decreased due to evacuation, the control device 6 operates the vacuum pump 4 to evacuate the vacuum tank 40 to a set pressure.

  The control device 6 sends the molten metal M into the cavity C of the vacuum casting mold 10 by the plunger 3 almost simultaneously with opening the valve 103. The molten metal M enters the cavity C from the injection parts 112 and 122, is evenly distributed, and flows to the product parts 113 and 123. By combining the first mold 11 and the second mold 12, the mold release agent 14 pushed out to the cavity C side is pushed away by the molten metal M. The molten metal M flows over the product parts 113 and 123 and further flows into the overflow parts 114 and 124 and hardens. The cast product is obtained by separating the first mold 11 and the second mold 12 and taking out the product and removing the injection parts 112 and 122, the overflow parts 114 and 124, and burrs.

  When casting the next product, the first mold surface 111, the second mold surface 121, the concave portion 13, the convex surface 15 including the convex portion 15, and the entire mating surface of the second mold 12. It is only necessary to apply the release agent 14 and match them. By simply applying the release agent 14, the same quality as when the sealing material is replaced every time the product is cast can be obtained.

  A vacuum casting mold 10 according to the second embodiment will be described with reference to FIGS. The vacuum casting mold 10 of the second embodiment does not have the shape of the concave portion 13 of the first mold 11 that becomes the cavity mold shown in FIG. 8 and the convex portion 15 in the second mold 12. The point is different from the vacuum casting mold 10 of the first embodiment, and other configurations are the same. Therefore, regarding the points other than these, the same reference numerals are given to the configurations having the same functions, and the description of the first embodiment is referred to, and the description below is omitted.

  As shown in FIG. 8, the recess 13 of the first mold 11 is formed in a region from a position away from the edge of the first mold surface 111 by a certain distance to the outer peripheral portion of the first mold 11. ing. That is, the outer peripheral portion at a position away from the edge of the first mold surface 111 by a certain distance is generally lowered by one step. The second mold 12 is flat from the outer periphery of the second mold surface 121 to the outer periphery of the second mold 12 as shown in FIGS. 9 to 11. The second mold 12 may be provided with a concave portion similar to the concave portion 13 on the outer periphery of the second mold surface 121, or may be provided with the convex portion 15 of the first embodiment.

  The vacuum casting mold 10 according to the second embodiment, in which the first mold 11 is formed as described above, is a joint surface between the first mold 11 and the second mold 12 as shown in FIG. When the release agent 14 is applied to and combined with each other, the release agent 14 between the first mold surface 111 and the second mold surface 121 and the recess 13 is pushed out into the recess 13 as shown in FIG. The recess 13 continuously surrounds the outer periphery of the cavity C as shown in FIG. Therefore, even when a large amount of the release agent 14 is applied, it flows and expands in the recess 13, so that it does not easily protrude beyond the mold beyond the recess 13.

  As in the case of the first embodiment, when the mold is heated to about 300 ° C., the release agent 14 gels as shown in FIG. 10, and the cavity C is hermetically sealed. Then, when this vacuum casting mold 10 is set in the vacuum casting apparatus 1 of FIG. 3 and cast, the inside of the cavity C is filled with the molten metal M as shown in FIG. As shown in FIGS. 10 and 11, the release agent 14 pushed into the recess 13 by combining the first mold 11 and the second mold 12 is accumulated on the cavity C side. Since the release agent 14 is gelled, the same function as that in which the sealing material is mounted is exhibited as in the first embodiment.

  A vacuum casting mold 10 according to the third embodiment will be described with reference to FIG. The vacuum casting mold 10 of the third embodiment is provided with a protruding pin on the first mold 11 which is a cavity mold shown in FIG. Configurations having the same functions as those of the vacuum casting mold 10 of the first and second embodiments are denoted by the same reference numerals and description thereof is omitted. The recess 13 continuously surrounds the cavity C along the outer peripheral edge of the first mold 11. The first mold 11 has a plurality of holes 115 penetrating in the direction from the cavity C to the recess 13 in the direction in which the first mold 11 and the second mold 12 are aligned.

  The protruding pin 105 has a thickness slightly smaller than the inner diameter of the hole 115 and is attached to each hole 115. The protrusion pin 105 is driven so as to protrude from the joint surface of the first mold 11 so as to separate the first mold 11 from the second mold 12. The protruding pins 105 may be operated at the same time, or may be configured so that all the protruding pins 105 protrude at the same time.

  As shown in FIG. 12, the tip of the protruding pin 105 is slightly retracted from the end of the hole 115. The first mold 11 further includes a groove 116 for individually communicating each hole 115 with the recess 13. The second mold 12 may have a convex portion at a position corresponding to the concave portion 13, or may be provided with a concave portion having the same shape facing the concave portion 13. The outer peripheral edge of the second mold 12 may be flat. The hole 115 and the groove 116 may be formed in the second mold 12, and the protruding pin 105 may be disposed in the second mold 12.

  In the vacuum casting mold 10 according to the third embodiment in which the first mold 11 is configured as described above, the mold release agent 14 is applied to the joint surfaces of the first mold 11 and the second mold. Then, the release agent 14 applied between the first mold surface 111 and the second mold surface 121 and the recess 13 not only enters the recess 13 but also the hole into which the protruding pin 105 is inserted. Also flows into 115. Since the hole 115 is formed with a fitting tolerance that allows the protruding pin 105 to move freely, it can be a path through which air flows when the cavity C is evacuated.

  In the vacuum casting mold 10 of the third embodiment, the release agent 14 that gels when heated flows into the holes 115, so that even a slight gap between the holes 115 and the protruding pins 105 is one by one. It can be hermetically sealed. Further, the end of the hole 115 communicates with the recess 13 through the groove 116. Excess release agent 14 applied between the cavity C and the recess 13 is collected by the nearby hole 115 and supplied to the recess 13. The release agent 14 applied to the joint surface between the first mold 11 and the second mold 12 can be quickly recovered, and the time for aligning the molds is shortened.

  When the vacuum casting mold 10 is set and cast in the vacuum casting apparatus 1 shown in FIG. 3, the mold release agent that has flowed into the recess 13 provided on the outer periphery of the cavity C, as in the first and second embodiments. When 14 is heated, it gels and serves as a sealing material. Since the release agent 14 before gelation is liquid, it is easy to handle.

  Therefore, even if the dividing line of the product has a complicated shape, the concave portion is formed so as to surround the periphery of the mold surface constituting the cavity C, and the mold release agent that is heated and gelled is applied. As with the vacuum casting mold 10 of the third embodiment, the confidentiality of the cavity C can be easily ensured.

  The vacuum casting mold is not limited to the above-described two-part mold, and can be implemented as a multi-part vacuum casting mold having three or more parts. In the case of a multi-division vacuum casting mold, a recess continuously communicating over all the joint surfaces of the mold corresponding to the dividing line of the product is formed at a certain distance from the outer shape of the cavity. By applying the mold release agent to the bonding surface and heating, it is possible to seal between the molds to such an extent that the cavity can be evacuated. In this way, the release agent gels to serve as a sealing material. Therefore, even in the case of multi-divided molds combined in a complicated manner, the cavity can be hermetically sealed so as to be evacuated.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The invention described in the scope of the claims at the beginning of the patent application of the original application is added below.
[1]
A first mold having a first mold surface that forms a first side profile with respect to a parting line of the product to be cast;
A second mold having a second mold surface joined to the first mold to form a second side profile with respect to the dividing line;
The first mold at a certain distance along the joint of the first mold surface and the second mold surface forming a cavity by combining the first mold and the second mold And a recess formed in at least one of the second molds;
A mold release agent that gels by being applied and heated to at least the inner region surrounded by at least the recesses of the first mold and the second mold;
A mold for vacuum casting.
[2]
The first mold has the recess,
The second mold has a convex part that fits into the concave part leaving a gap,
The part of the mold release agent applied between the joint portion and the concave portion enters the gap by combining the first mold and the second mold, according to [1]. Die for vacuum casting.
[3]
The first mold surface and the second mold surface include an injection part to which a molten metal that is the product is supplied, a product part that forms the product, and the product part with respect to the injection part. An overflow section provided on the downstream side of the flow of the molten metal,
The said recessed part is a metal mold | die for vacuum casting as described in [1] which encloses the outer periphery of a said 1st mold surface and a said 2nd mold surface continuously.
[4]
The vacuum casting according to [1], wherein the concave portion is formed in a region from a position separated by a certain distance along the joint portion to an outer peripheral portion of the first mold and the second mold. Mold.
[5]
At least one of the first mold and the second mold has a hole penetrating in a direction in which the first mold surface and the second mold surface are aligned in a region from the cavity to the recess. ,
An extruding pin that is passed through the hole to separate the first mold from the second mold;
A vacuum casting mold according to [1], further comprising a groove communicating from the recess to the hole.
[6]
A series of recesses surrounding the outer periphery of the cavity at a certain distance along the joint between the first mold surface and the second mold surface forming the cavity, and the first mold surface having the first mold surface. Forming at least one of one mold and a second mold having the second mold surface;
Applying a release agent that gels when heated to at least the region including the cavity inside the recess,
By combining the first mold and the second mold coated with the mold release agent, at least the mold release agent in the region between the cavity and the recess is infiltrated into the recess,
The first mold and the second mold are heated so that the cavity can be evacuated by heating the first mold and the second mold to gel the release agent. Sealing a vacuum casting method.

The invention described in the claims of the original application immediately before the division will be added below.
[1]
A first mold having a first mold surface;
A second mold having a second mold surface and joined to the first mold;
A recess formed in at least one of the first mold and the second mold at a position more than a certain distance away from edges of the first mold surface and the second mold surface;
A vacuum casting mold comprising: a mold release agent that is applied to and heated at least at the first mold and the second mold in an inner region surrounded by the recess.
[2]
The first mold has the recess,
The second mold has a convex part that fits into the concave part leaving a gap,
A part of the mold release agent applied between the edge and the concave portion enters the gap when the first mold and the second mold are combined with each other, according to [1]. Die for vacuum casting.
[3]
The first mold surface and the second mold surface include an injection part to which a molten metal that is the product is supplied, a product part that forms the product, and the product part with respect to the injection part. An overflow section provided on the downstream side of the flow of the molten metal,
The vacuum casting mold according to [1], wherein the concave portion continuously surrounds the outer periphery of the first mold surface and the second mold surface.
[4]
The said recessed part is formed in the whole area | region ranging from the position away from the fixed distance or more along the said edge to the outer peripheral part of the said 1st metal mold | die and the said 2nd metal mold | die, It described in [1]. Mold for vacuum casting.
[5]
At least one of the first mold and the second mold has a hole penetrating in a direction from the edge to the recess in a direction in which the first mold and the second mold are aligned. ,
An extruding pin that is passed through the hole to separate the first mold from the second mold;
A vacuum casting die described in [1], comprising a groove communicating from the recess to the hole.
[6]
At least one of the first mold having the first mold surface and the second mold having the second mold surface is at least a certain distance from the edge of the first mold surface and the second mold surface Forming a series of recesses surrounding the outer periphery of the first mold surface and the second mold surface at a distant position;
Applying a release agent that gels when heated to at least the region inside the recess,
By combining the first mold with the mold release agent and the second mold, the mold release agent applied to at least the region from the edge to the recess enters the recess. Let
A vacuum comprising: sealing between the first mold and the second mold by heating the first mold and the second mold to cause the release agent to gel. Casting method.
[7]
A plurality of molds each formed with a mold surface and a recess surrounding the mold surface,
A mold for vacuum casting comprising: a release agent that is applied to at least an inner region of each of the molds and gels when heated.
[8]
A recess continuously communicating with the outer periphery of the mold surface formed on each of the plurality of divided molds is formed, and the gel is separated when heated to an area inside the recess of each of the molds. A vacuum casting method comprising: applying a mold agent, combining a plurality of the molds, and then heating to seal the inside of the recess.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum casting apparatus, 10 ... Mold for vacuum casting, 11 ... 1st metal mold, 12 ... 2nd metal mold, 13 ... Concave part, 14 ... Mold release agent, 15 ... Convex part, 105 ... Extrusion pin, 111 ... 1st mold surface, 121 ... 2nd mold surface, 112, 122 ... Injection part, 113, 123 ... Product part, 114, 124 ... Overflow part, 115 ... Hole, 116 ... Groove, C ... Cavity, M ... molten metal.

Claims (7)

A first mold having a first mold surface and a recess provided at a position separated from the edge of the first mold surface by a certain distance or more;
A second mold having a second mold surface and joined to the first mold;
A casting apparatus comprising: a mold release agent that gels by being applied to and heated by at least the first mold and the second mold in an inner region surrounded by the recess. A first mold provided with a recess and a mold surface surrounded by the recess;
A second mold joined to the first mold;
A casting apparatus comprising a mold release agent that is applied to at least an inner region of each of the molds and is gelled when heated. The second mold has a convex part that fits into the concave part leaving a gap,
3. The part of the mold release agent applied between the edge and the recess enters the gap when the first mold and the second mold are combined. Casting equipment described in 1. The first mold surface and the second mold surface include an injection part to which a molten metal that is the product is supplied, a product part that forms the product, and the product part with respect to the injection part. An overflow section provided on the downstream side of the flow of the molten metal,
3. The casting apparatus according to claim 1, wherein the recess continuously surrounds an outer periphery of the first mold surface and the second mold surface. 4. The said recessed part is formed in the whole area | region ranging from the position which left | separated more than the fixed distance along the said edge to the outer peripheral part of a said 1st metal mold | die and a 2nd metal mold | die. The casting device described. At least one of the first mold and the second mold has a hole penetrating in a direction from the edge to the recess in a direction in which the first mold and the second mold are aligned. ,
An extruding pin that is passed through the hole to separate the first mold from the second mold;
The casting apparatus according to claim 1, further comprising a groove communicating from the recess to the hole. For at least one of and if joint surfaces mutually contact with each other when a plurality are used in combination, in a series over all the mold surface and the bonding surface corresponding to the product of the dividing line surrounding the periphery of the mold surface A plurality of molds provided with communicating recesses ;
A casting apparatus comprising: a mold release agent that gels when applied to at least an inner region of the mold and heated.

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