JP3062439B2 - Casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting apparatus, and more particularly to a casting apparatus capable of effectively supplying molten metal to a vertically extending injection sleeve for supplying molten metal to a die casting machine. It relates to a casting device.

[0002]

2. Description of the Related Art A casting apparatus supplies a molten metal into a cavity having a predetermined shape, and solidifies the molten metal in the cavity to obtain a wide range of desired cast products.

[0003] Casting equipment can be generally classified into hot chambers and cold chambers. FIG. 5 discloses an example of a known cold chamber type casting apparatus.

A horizontally oriented injection sleeve 11 is arranged so as to be located substantially at the center of a fixed plate 12. The injection sleeve 11 has a hot water supply port 13 located substantially at the center of the bottom surface of the fixed plate 12. The fixing plate 12 communicates with an L-shaped pipe hole 14 located below the hot water supply port 13. A hot water supply pipe 15 for supplying the molten metal to the injection sleeve 11 has one end extending to the pipe hole 14 and is connected to the hot water supply port 13.

[0005] The other end of the hot water supply pipe 15 is connected to a molten metal holding furnace 16 for storing the molten metal 17 and maintaining it at a predetermined temperature.

The electromagnetic pump 18 is provided to the injection sleeve 11 through the hot water supply port 13 with respect to the hot water supply pipe 15 for supplying the molten metal 17 from the molten metal holding furnace 16. The molten metal holding furnace 16 has a heater 19 for maintaining the molten metal 17 in the molten metal holding furnace 16 at a predetermined temperature.

[0007] The cavity 20 is defined between a fixed die 21 and a movable die 22. A sensor 23 for detecting temperature faces one end of the bottom of the cavity 20 connected to the injection sleeve 11 via the runner 24. When the required amount of the molten metal 17 is supplied to the injection sleeve 11, the sensor 23 comes into contact with the filled molten metal 17 and detects that the required and sufficient amount of the molten metal 17 has been accurately supplied into the injection sleeve 11. That is, the injection sleeve 11 contains 100 molten metal 17.
% Is satisfied. The frame 25 is connected to the outer surface of the fixed plate 12 and is firmly tightened to a movable die frame 28 via a tie bar 27 with bolts 26. A rod 29 having one end connected to the joint 30 and the other end holding the injection plunger tip 31 is connected to a shaft 32 of a cylinder 33 driven by pressure.

A conventional casting process will be described with reference to FIG.

The molten metal 17 stored in the molten metal holding furnace 16 is heated to a predetermined temperature by a heater 19 and held.
At this time, the injection plunger tip 31 performs a retreat operation by the cylinder 33. The electromagnetic pump 18 is driven to supply the molten metal 17 from the molten metal holding furnace 16 to the injection sleeve 11 via the molten metal supply pipe 15. Electromagnetic pump 18 is for molten metal 1
7 is supplied to the injection sleeve 11 until a predetermined amount is supplied to the injection sleeve 11. When the sensor 23 detects that a predetermined amount of molten metal 17 has been supplied, the electromagnetic pump 18
A signal to stop supplying the molten metal 17 to the controller is sent to a controller (not shown).

The cylinder 33 displaces the rod 29 at a predetermined speed, and the injection plunger tip 31 is pushed forward at that speed.

The molten metal 17 thus supplied to the injection sleeve 11 is forcibly injected into the cavity 20 by the injection plunger tip 31 via the runner 24. After a certain period of time, the cavity 20 is cooled, and the molten metal 17 is solidified. After the molten metal 17 in the cavity 20 has solidified,
The cylinder 33 moves the injection plunger tip 31 away from the cavity 20. Then, the fixed die 21 and the movable die 22 are separated from each other, and the completed casting can be taken out from the cavity 20.

In the above casting apparatus, the injection sleeve 11
Is placed at the position shown in FIG. 6, a high quality final casting can be obtained.

[0013]

However, at times, the injection sleeve 11 needs to be vertically oriented in order to supply the molten metal 17 to a cavity 20 located above it.

FIGS. 6 and 7 show a case where the molten metal is supplied to the upper cavity via the injection sleeve oriented in the vertical direction.

FIG. 6 shows an injection sleeve 34 having a vertically oriented cylinder rod 35 and a plunger tip 36 at a position to forcibly supply molten metal to an upper die assembly (not shown). The injection sleeve 34 has a hot water supply port 37, which is provided near the bottom of the injection sleeve 34 to introduce the molten metal 17. Hot water supply port 37 is connected to hot water supply pipe 38 via hot water supply block 39. One end of the hot water supply pipe 38 is connected to the outlet of the molten metal holding furnace 16 that holds the molten metal 17 at a predetermined temperature. The hot water supply pipe 38 having a crank shape has a fluid passage for supplying the molten metal 17 from the molten metal holding furnace 16 to the injection sleeve 34 through the hot water supply port 37 and the hot water supply block 39. The molten metal 17 is supplied to a hot water supply pipe 38 using an electromagnetic pump 18.
Injected through. The heating coil 40 is the molten metal holding furnace 1
6 and above the crank-shaped hot water supply pipe 38 on the side of the hot water supply block 39 to keep the molten metal 17 in a molten state.

The disadvantages of the above casting apparatus will be described below.

First, when the electromagnetic pump 18 is energized to fill the injection sleeve 34 with the molten metal 17, especially when the molten metal 17 first enters the injection sleeve 34 from the hot water supply port 37, the inside of the hot water supply pipe 38 The gap 41 allows the molten metal 17 to enter the upper part of the crank-shaped hot water supply pipe 38. The gap 41 remains in the hot water supply pipe 38 until the molten metal 17 fills the injection sleeve 34 at the top of the hot water supply port 37. Molten 1
A large part of the surface of the surface 7 is exposed in the horizontal direction above the hot water supply pipe 38 in a crank shape. Such a large surface portion S is easily oxidized by the air in the hot water supply pipe 38, resulting in a poor quality cast product.

Second, when the molten metal 17 passes through the hot water supply port 37 and enters the injection sleeve 34, the surface portion S of the molten metal 17
Undulations and waves W are generated. Such waves W increase the amount of air taken into the molten metal 17. When the air thus taken in is brought into the cavity 20, a poor quality casting having nests therein is formed.

Third, as a result of the upper part of the crank-shaped hot water supply pipe 38 being oriented horizontally, the plunger tip 3 is moved from the position shown by the broken line in FIG.
6 rises high and the molten metal 1 remaining in the hot water supply pipe 38
7 is spilled through the hot water supply port 37 to the bottom of the injection sleeve 34 below the plunger tip 36. The molten metal 17 thus spilled subsequently collects in a casting device located below an injection sleeve 34 in a cylinder (not shown) of a cylinder rod 35 for moving a plunger tip 36 and solidifies. The molten metal 17 that has flowed in and solidified in this way deteriorates the efficiency of the casting operation.

Fourth, a crank-shaped hot water supply pipe 38 occupying a central portion between the molten metal holding furnace 16 and the hot water supply block 39.
In this area, since it contacts cold air, it is necessary to dispose a heating coil 40 in order to keep the molten metal 17 in a molten state. In particular, it is necessary above the crank-shaped hot water supply pipe 38. However, even when the heating coil 40 is used, it is difficult to maintain the molten metal 17 in the entire volume of the hot water supply pipe 38 in a sufficiently appropriate molten state. And
In particular, the molten metal 17 in the hot water supply pipe 38 includes a hot water supply block 39 or a wall portion of the crank-shaped hot water supply pipe 38 which is apart from a portion where the heating coil 40 actually has a heating effect.
It tends to solidify inside the wall of the hot water supply pipe 38 or the hot water supply block 39.

The solidification of the molten metal 17 causes the hot water supply pipe 38
And the capacity of hot water supply block 39 is lost. Since the supply of the correct amount of molten metal 17 to the injection sleeve 34 is adjusted by the volume inside the hot water supply pipe 38, such a decrease in the volume inside the hot water supply pipe 38 and the inside of the hot water supply block 39 does not actually occur. Molten metal 17 in injection sleeve 34
Is a problem when adjusting the supply.

Furthermore, the fact that the molten metal 17 to be supplied to the injection sleeve 34 solidifies on the wall while passing through the hot water supply pipe 38 between the molten metal holding furnace 16 and the injection sleeve 34 can be solved by the following reason. Melt 1 to be supplied to the assembly
As a result, the total amount of molten metal 17 supplied to the injection sleeve 34 and the cavity 20 cannot be controlled.

FIG. 7 shows one method of improving the problem related to the spilling of the molten metal 17 on the bottom portion of the injection sleeve. In FIG. 7, the same components as those described above are denoted by the same reference numerals, and detailed description will be omitted.

Specifically, the hot water supply block 39 and the hot water supply port 3
A hot water supply pipe 38 which enters the injection sleeve 34 through 7 is provided with an inclined passage. The hot water supply block 3
9 also has a passage 39a therein. Hot water supply pipe 38
When the plunger tip 36 reaches the upper portion of the hot water supply port 37 by the inclined passage passing through the hot water supply block 39 and
The tendency of the molten metal 17 to flow to the bottom of the injection sleeve 34 is reduced.

Further, most of the molten metal 17 remaining at the upper part of the hot water supply block 39 flows out to the bottom of the injection sleeve 34 through the hot water supply port 37, but instead of the hot water supply pipe 3
8 and the path of the hot water supply block 39 are returned.

However, even with the improvement shown in FIG. 7, the hot water supply pipe 38 and the hot water supply block 3 which are generated because the surface of the molten metal 17 is exposed to air inside the hot water supply pipe 38.
The problem that the molten metal adheres and solidifies on the wall surface of 9 cannot be solved, and as a result, oxidation of the molten metal 17 may occur.

The present invention solves this kind of problem and prevents the oxidation of the molten metal in the casting process and always accurately weighs an appropriate amount of molten metal into the chamber in order to obtain a high-quality casting without defects. It is an object of the present invention to provide a casting apparatus capable of performing the following.

[0028]

In order to solve the above-mentioned problems, the present invention provides a molten metal holding furnace for storing molten metal,
In order to produce a casting, the molten metal in the molten metal holding furnace is forced
A die assembly defining a cavity to be injected
Before having a sprue and located above the molten metal in the direction of travel
While supplying the molten metal to the cavity,
A truncated cone-shaped seating recess is provided at the hot water inlet.
An injection sleeve, which is disposed near the injection sleeve.
A bent passage communicating with the hot water supply port; and
Has a frusto-conical taper connection that sits in the seat recess
Hot water supply block, the seating concave portion and the tapered connecting portion
A heat-insulating packing member disposed at a seating portion with
And / or formed between the seating recess and the tapered connection.
Heat insulating means having a heat insulating space, and the bent path
The molten metal holding furnace and the hot water supply
A hot water supply pipe connected to a lock; and
Pass the hot water supply pipe from the hot water holding furnace, the bent
Hot water is supplied to the injection sleeve through the passage and the hot water supply port.
And a supply unit for the casting apparatus.
It is concerned.

Also, the present invention provides a method for storing molten metal.
A hot-water holding furnace and the molten-metal holding furnace for producing a cast product
Die that defines the cavity into which the molten metal is forcibly injected
Has an assembly and a hot water supply port, and upwards in the direction of molten metal
For supplying the molten metal to the cavity located at
An injection sleeve, and disposed around the injection sleeve.
And a truncated cone on the outer periphery corresponding to the hot water supply port
A sleeve guide provided with a seat recess,
The guide is arranged near the heat guide and communicates with the hot water supply port.
A truncated cone having a folded passage and seated in the seating recess
A hot water supply block having a tapered connecting portion having a shape, and the seat
A cutout provided at a seating portion between the concave portion for use and the tapered connecting portion.
A heat packing member and / or the seat recess and the
Insulation with a space for heat insulation formed between
Means and for supplying molten metal to said bent passages
A hot water supply pipe connected to the molten metal holding furnace and the hot water supply block;
And the hot water supply pipe from the melt holding furnace to the hot water supply pipe.
Through the bent passage and the hot water supply port
Supply means for supplying hot water to the injection sleeve.
And a casting apparatus characterized by the following.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a casting apparatus according to the present invention will be described.

In the drawings, the same components as those already described are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows the vertically upwardly extending injection sleeve 34 located on the lower surface of the die assembly 42 and securely secured to a sleeve substrate 43 provided thereon.
The plunger tip 36 and the cylinder rod 35 are disposed on the injection sleeve 34 for forcibly supplying the molten metal 17 above the die assembly 42. This injection sleeve 34
Is a feature of an important aspect of the present invention, which is located near the bottom of the injection sleeve 34 and has a hot water supply port 37 for guiding the melt 17 from a melt holding furnace (not shown). Hot water supply block 44 is located close to hot water supply port 37. The hot water supply block 44
Has a curved tubular fluid passage (bent passage) 45 which is a passage through which the molten metal 17 enters the injection sleeve 34 through the hot water supply port 37.

The hot water supply block 44 is connected to the hot water supply port 37 via a tapered connecting portion 46 preferably having a truncated cone shape. More specifically, since the injection sleeve 34 in the space of the hot water supply port 37 is well connected to the tapered connecting portion 46 of the hot water supply block 44, the seating recess 47 having a truncated cone shape is used.
Having. The concave portion 47 is a seating portion 48 for receiving a packing (insulating packing member) 49 constituting a heat insulating means.
Having. Such packing 49 is used for the hot water supply block 44.
And supply the molten metal 17, and
Like the hot water supply port 37, it is useful for two purposes of preventing the transfer of heat from the hot water supply block 44. One end of the curved tubular fluid passage 45 located on the opposite side of the hot water supply port 37 is connected to the hot water supply pipe 5.
0 and another end (not shown) of the hot water supply pipe 50 is connected to the molten metal holding furnace. Hot water pipe 5 with molten metal 17
To supply from 0, for example, the electromagnetic pump 1 shown in FIG.
8 and the like. The hot water supply pipe 50 is connected to the hot water supply block 44 and the seating portion 48 via another packing 51.

FIGS. 1 and 2 show the structure installed on the hot water supply block 44 close to the injection sleeve 34. FIG.
This will be described with reference to FIG.

A set of parallel holders 52 joined to the bottom of the sleeve substrate 43 is suspended and fixed to the die assembly 42 mounted on a fixed die plate (not shown) using, for example, bolts (FIG. 1). And FIG. 2). The holder 52 is disposed with both side surfaces of the hot water supply block 44 interposed therebetween, and the lower portion of the base plate 53 is movably fitted into a groove 52 a provided at a lower portion of the holder 52 facing each other. The base plate 53 has a box shape whose upper part is surrounded by a wall 54 and whose upper part is open, and the hot water supply block 44 is supported inside the base plate 53 via a heat insulating plate 55.

A pull-in bolt (lower bolt) 56 constituting a screw mechanism is supported below the holder 52, and the pull-in bolt 56 is screwed into a screw hole formed in a lower portion of the base plate 53. A nut 56a is screwed onto the draw-in bolt 56. By rotating the nut 56a, the draw-in bolt 56 exerts a thrust on the base plate 53, and the lower part of the hot water supply block 44 is drawn. That is, the seat 48 of the curved tubular fluid passage 45 is provided with the packing 5 so that the molten metal 17 does not leak.
1 is strongly pressed against the hot water supply pipe 50.

At the same time, the upper bolt 57 is screwed into the screw hole of the clamp holder 58 so as to press the wall 54. When turning the nut 56a, the upper bolt 57 presses against the wall 54, so that the hot water supply block 44 above it is pushed in the direction of the injection sleeve 34. Therefore, the tapered connecting portion 46 firmly presses the concave portion 47 via the packing 49 for supplying the molten metal 17 between the curved tubular fluid passage 45 and the hot water supply port 37 without leaking.

FIG. 3 shows details of the tapered connecting portion 46 and the hot water supply block portion 44 according to the present invention. One of the constituent elements according to the present invention is to supply the molten metal 17 to the fluid passage so as to eliminate a problem relating to oxidation of a metal used as a material of the molten metal 17. Accordingly, the present invention provides a tortuous and curved tubular fluid passage 45 located inside the hot water supply block 44. After the injection of the melt 17 into the cavity located above, the melt 17 remaining inside the curved tubular fluid passage 45 flows down into the inclined portion 61 and remains on the level line 1 of the vertical upright portion 60 shown in FIG. . The surface of the melt 17 exposed to air at the level line 1 is very small and substantially equal to πr ² when the radius of the vertical upright 60 of the curved tubular fluid passage 45 is r. Therefore, only a very limited part of the surface of the molten metal 17 is exposed to air, and the oxidation of the molten metal 17 can be prevented.

To produce the highest quality final castings,
Another component is to keep the molten metal in the curved fluid passage 45 of the hot water supply block 44 at all times so as to prevent the molten metal from solidifying and to adhere to the inside of the curved fluid passage 45. That is. Therefore, heating means 62, preferably made of ceramic material, is included in hot water supply block 44. Due to the heat conducting properties of the ceramic, the heating means 62 heats the entire hot water supply block 44 uniformly. That is, the bent passages 45 are all heated uniformly. Therefore, the tendency of the molten metal 17 to solidify on the wall of the curved tubular fluid passage 45 is smaller than in the case where the crank-shaped supply pipe according to the related art is used.

It is preferable to form the molten metal block from a ceramic material having an attribute in which the molten metal 17 does not easily adhere thereto and having good thermal conductivity. However, it may be necessary to make the hot water supply block 44 from a material other than ceramic. For example, when the casting is made of an alloy, steel is used, and at very high melting temperatures, molybdenum steel is used. It should be noted that the hot water supply block 44 must be maintained at a high temperature, typically in the temperature range of 600 ° C. or higher. However, it is not preferable that the temperature of the molten metal 17 once supplied to the injection sleeve 34 rises. As a result, effective insulation material needs to be provided between the hot water supply block 44 and the injection sleeve 34. In the present invention, this is performed by means for connecting the tapered connecting portion 46 and the concave portion 47 to the hot water supply block 44 and the injection sleeve 34, respectively.

As shown in FIG. 3, a hot water supply block 44 is attached to the injection sleeve 34 via a tapered connecting portion 46 having a truncated conical shape.
Are concatenated. The tapered connecting part 46 is the tapered connecting part 4
6 to be connected to the injection sleeve 34 having a truncated conical recess 47. Taper connection 4
6 and the concave portion 47 are joined to an air gap (insulating means) 63 for leaving a space for air therebetween. Therefore, a gap 63 remains between the wall 64 of the concave portion 47 and the tapered wall of the tapered connecting portion 46. In reality, the hot water supply block 44
A part of the surface slightly contacts the hot water supply port 37. Further, the volume of the hot water supply block 44 is only slightly separated from the injection sleeve 34. In practice, a very small portion of the hot water supply block 44 is bounded by the injection sleeve 34 and the tapered connection portion 46, and the volume of the hot water supply block 44 is consequently not directly in contact with the injection sleeve 34, so that heat is transferred to other portions. Leave on part. Therefore, hot water supply block 44
The conduction of heat between the and the injection sleeve 34 is effectively reduced. Furthermore, the tapered connection 46 and the recess 47 and the gap 63 have a heat-insulating layer with a special effect between the injection sleeve 34 and the hot water supply block 44, thus avoiding the transfer of heat between them.

Further, the packing 49 described above and shown in FIG. 1 is supplied between the tapered connecting portion 46 and the concave portion 47 to supply a heat insulating layer having a different configuration. Therefore, the injection sleeve 34 can effectively perform heat insulation from a high temperature by the heating means 62 of the hot water supply block 44.

FIG. 4 shows the hot water supply block 44 and the injection sleeve 3.
4 shows a detail of a second embodiment according to the invention for providing a special heat-insulating layer between the second and fourth embodiments.

If necessary, the injection sleeve 34 may be provided with an injection sleeve guide 65. Then, the hot water supply block 44 can be effectively connected to the injection sleeve 34. In the present embodiment, the injection sleeve guide 65 and / or the injection sleeve 34 itself is provided with the concave portion 4 for connecting the tapered connection portion 46 of the hot water supply block 44.
7a. Thus, the injection sleeve guide 65 is provided with another layer of insulation between the hot water supply block 44 and the injection sleeve 34, and therefore the injection sleeve 34 itself may be located outside the direct heat source contacts of the hot water supply block 44. it can.

[0045]

The function and effect of the present invention will be described.

The molten metal is heated in a molten metal holding furnace and maintained at a desired temperature. The molten metal is conveyed to the die assembly via a hot water supply pipe and a hot water supply block, for example, by a supply means using an electromagnetic pump. The melt, as a result,
After passing through the hot water supply pipe, the hot water supply block moves in a bent path. At this time, the rod retreats, and a prescribed total amount of molten metal is supplied to the injection sleeve through the hot water supply port. After filling the injection sleeve with a certain amount of molten metal, the rod moves the plunger tip upward, forcing the molten metal into the die assembly. Since the bent passage is located in the hot water supply block, the passage time of the molten metal in the bent passage, which is a hot water supply narrow path, can be relatively shortened. Therefore, a favorable molten metal state can be maintained until the molten metal reaches the hot water supply runner. In addition, the volume of the bent passage is small, and it is possible to minimize the contact of the molten metal surface with oxygen in the bent hot water supply path. Thus, the problem of oxidation of the molten metal in the hot water supply path can be overcome. Furthermore, during the injection of the molten metal supplied to the injection sleeve, the molten metal remaining in the bent passage flows out from its upper part to the lower part. Therefore, the molten metal supplied to the bottom end of the injection sleeve can also avoid the problem by contacting only a part of the surface of the molten metal with the air in the bent passage.

The molten metal in the hot water supply block is uniformly heated by the heating means. Since the hot water supply block is made of a ceramic material, the inside of the bent passage is uniformly heated to a predetermined temperature. Therefore, it is possible to prevent the molten metal from solidifying and adhering to the wall in the bent passage. At the same time, unnecessary heat transfer between the hot water supply block and the injection sleeve can be avoided in practice by the air gap, the sleeve substrate and the recess, which effectively supply the heat insulating layer between the hot water supply block and the injection sleeve.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional explanatory view of a casting device according to an embodiment of the present invention.

FIG. 2 is an explanatory right side view of the casting apparatus according to the embodiment of the present invention shown in FIG.

FIG. 3 is a partial cross-sectional explanatory view showing details of a hot water supply block and a curved fluid passage of the casting apparatus according to the embodiment of the present invention.

FIG. 4 is a partial cross-sectional explanatory view showing details of an injection sleeve of a casting apparatus according to a second embodiment of the present invention.

FIG. 5 is a partial vertical cross-sectional explanatory view of a casting apparatus according to a conventional technique.

FIG. 6 is a partial longitudinal sectional view of a casting apparatus having a vertically upward injection sleeve and a supply passage located between the injection sleeve and the melting furnace according to the prior art.

FIG. 7 is a partial vertical cross-sectional explanatory view of a casting apparatus including a vertically upward injection sleeve and a melt passage having a supply passage directed in the direction of the injection sleeve, that is, upward.

[Explanation of symbols]

Reference Signs List 17 molten metal 34 injection sleeve 36 plunger tip 37 hot water supply port 44 hot water supply block 45 curved tubular fluid passage 46 tapered connecting portion 47, 47a concave portion 48 seating portion 50 hot water supply pipe 51 packing 52 holder 55 ... heat insulation plate 56 ... pull-in bolt 60 ... vertical upright part 62 ... heating means 63 ... cavity 64 ... recessed wall

Claims (6)

(57) [Claims] 1. A molten metal holding furnace for storing molten metal, a die assembly defining a cavity into which molten metal of the molten metal holding furnace is forcibly injected for manufacturing a cast product, and a hot water supply port. An injection sleeve that supplies the molten metal to the cavity that is positioned upward with respect to the direction of travel of the molten metal, and that is provided with a truncated conical seating concave portion that is located at the hot water supply port on an outer peripheral portion; A bent passage communicating with the hot water supply port, which is disposed near the sleeve , and seated in the seating recess;
A hot water supply block having a frusto-conical tapered connecting portion; a heat insulating packing member disposed at a seating portion between the seating concave portion and the tapered connecting portion; and / or a heat insulating packing member provided between the seating concave portion and the tapered connecting portion. A heat insulating means having a heat insulating space formed therebetween; a hot water supply pipe connected to the molten metal holding furnace and the hot water supply block to supply the molten metal to the bent passage; And a supply means for supplying hot water to the injection sleeve through the bent passage and the hot water supply port. 2. A molten metal holding furnace for storing molten metal, a die assembly for defining a cavity into which molten metal of the molten metal holding furnace is forcibly injected for manufacturing a cast product, and a hot water supply port. An injection sleeve for supplying the molten metal to the cavity positioned in an upward direction with respect to the traveling direction of the molten metal; and an injection sleeve arranged to surround the injection sleeve, and an outer peripheral portion corresponding to the hot water supply port. a sleeve guide seating recesses of frustoconical shape is provided, is placed in the vicinity of the sleeve guide, the taper connection frustoconical seated on and the seating recess has a refractive passageway communicating with said hot water port A hot water supply block having a portion, a heat-insulating packing member disposed at a seating portion between the seating concave portion and the tapered connecting portion, and / or formed between the seating concave portion and the tapered connecting portion. And insulating means having a thermal space, in order to supply the molten metal passage have a refractive, a hot water supply pipe connected to said hot water supply block and the molten metal holding furnace, the hot water supply pipe to the molten metal from the molten metal holding furnace passed, casting apparatus, characterized in that it comprises a supply means for hot-water supply into the injection sleeve through the refracted path between the hot water supply port. 3. The casting apparatus according to claim 1, wherein said hot water supply block is provided with ceramic heating means for heating and maintaining said hot water supply block at a predetermined temperature. 4. The apparatus according to claim 1, wherein a pair of holders, a base plate movably mounted in a groove provided in the holder, and a screw mechanism for moving the base plate with respect to the groove. And a heat insulating plate that supports the hot water supply block and is disposed on the base plate. 5. An apparatus according to claim 4, wherein said clamp holder is provided between said holders and said clamp holder for sealing a tapered connecting portion of said hot water supply block into a seating recess of said injection sleeve. And an upper bolt capable of being screwed into the base plate to press the base plate. 6. The apparatus according to claim 4, wherein the screw mechanism is supported by the holder and a screw hole formed in a lower portion of the base plate, and is screwed into the screw hole to advance and retract the base plate. A casting apparatus comprising: a lower bolt to be moved;