JP2003039151A - Mold casting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold casting device provided with a mold moving device small in construction and small in size, wherein the device is not stopped even in repairing and replacing the mold, and the entrainment of air is made little to the utmost in pouring a molten metal prior to injection. SOLUTION: The mold casting device is provided with an injection station 1 equipped with an injection device injecting and filling a molten metal from the lower side into a pair of upper and lower molds 17 composing a moving side and a stationary side molds, a fixed board 4 for clamping against the pair of the molds, and a mold clamping movable board 7 vertically movable by a mold clamping mechanism 6, a taking out station provided respectively on the injection station adjacently and equipped with a mold opening/closing stationary board 8 and a mold opening/closing movable board 13 which is made vertically movable while being equipped with the upper mold, and a mold moving stand 11 mounting and fixing the pair of the mold 17 and movable among each the station, and an injection speed control part controlling the position of an injection plunger tip of the injection device so as to move downward according to the pouring amount in injecting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shuttle type rigid die casting machine.

[0002]

2. Description of the Related Art In a vertical injection mold casting apparatus, two sets of mold opening and closing units each consisting of a mold and its temporary mold clamping mechanism are mounted on a trolley to reduce the casting cycle. The following two examples have been proposed as a so-called shuttle type vertical die casting machine that is a continuous casting device that performs mold clamping and casting while alternately taking in and out.

Japanese Utility Model Application Laid-Open No. 58-9725 proposes that two sets of mold opening / closing units are mounted on a long carriage extending from a mold clamping position to one external mold opening / closing position. But 1
Since two sets of mold opening / closing units are mounted on one dolly, if one of the mold opening / closing units fails, repair,
There was a problem that the entire casting apparatus could not be used during the replacement. Further, since the moving mechanism is a trolley in which two sets of mold opening / closing units are mounted, there is a problem that the structure becomes large and complicated.

[0004]

[Problems to be Solved by the Invention]
In the No. issue, the trolleys equipped with mold opening / closing units from the right and left sides of the mold are alternately put in and taken out so that even if one of the mold opening / closing units fails, casting can be continued by the other mold opening / closing unit. Has been done.

However, even in this apparatus, the temporary mold clamping mechanism is mounted on the carriage, which causes some problems. First, it is necessary to make the structure of the truck robust and to increase the size of the truck itself in order to support the weight of the temporary mold clamping device and the mold. Secondly, there are 3 types of dolly, temporary mold clamping device, and mold which are upsized.
Since the points move, there is a problem that the moving device and the supporting portion are largely consumed and the life of the device is short. Thirdly, it is necessary to move the hydraulic hose for controlling the temporary mold clamping device according to the movement of the temporary mold clamping device. Therefore, there are problems such as difficulty in arranging the moving hose and interference between the moving hose and other parts.

Further, in the conventional vertical die casting apparatus, when the molten metal is supplied into the injection sleeve and the ladle is used, as shown in FIG. When pouring into the inclined injection sleeve SL, the upper end surface of the plunger tip PT is the injection sleeve SL.
It is pre-positioned at a position which is lowered by a distance l below the opening of No. 1, and the molten metal ML is poured into the injection sleeve SL as shown by rotating the ladle LD in this state. The position of the upper end surface of the plunger tip PT is determined as a predetermined position so that the molten metal ML does not overflow even if all the molten metal ML is poured into the injection sleeve SL.

In the state shown in FIG. 8, there is a drop between the upper end surface of the plunger tip and the spout P of the ladle LD, and when a predetermined amount of the molten metal ML is poured into the injection sleeve SL, the molten metal foams. There is a problem in that the quality of the cast product is unfavorable if it is awakened and air is entrained in it, and if it is directly injected into the mold.

Therefore, an object of the present invention is to provide a die casting apparatus which has a die moving apparatus having a simple structure and a small size, and which does not stop the apparatus even when the die is repaired or replaced.
Another object of the present invention is to provide a mold casting that does not cause bubbles when hot water is supplied into the injection sleeve when a ladle is used as a molten metal supply means, and thus can reduce entrapment of air as much as possible.

[0009]

In order to solve the above-mentioned problems, in the mold casting apparatus according to the present invention, the molten metal is supplied into the pair of molds prior to the injection of a predetermined amount of the molten metal from below. The injection sleeve that is supplied from the injection sleeve, the injection plunger that is inserted into the injection sleeve so as to be able to move forward and backward, and has the plunger tip attached to the tip, and the injection speed of the injection plunger are drive-controlled according to a pre-stored injection speed command. In a vertical mold casting apparatus including an injection device including an injection speed control unit, the injection speed control unit is configured to supply the molten metal from the molten metal supply means into the injection sleeve, according to the amount of the supplied molten metal. In order to move the position of the plunger tip in the sleeve downward, there is provided means for instructing the plunger tip position during hot water supply. Further, the mold casting device according to the present invention is a vertical mold casting device, in which molten metal is introduced from below into a pair of molds composed of an upper mold and a lower mold which constitute a movable mold and a stationary mold. An injection station equipped with an injection device for injection filling, a mold clamping fixed plate for the pair of molds, and a mold clamping movable plate that can be moved up and down by a mold clamping mechanism, and a mold opening / closing unit provided adjacent to the injection station. An unloading station equipped with a fixed plate and the upper mold and equipped with a movable plate for opening and closing the mold that can be moved up and down by an opening / closing mechanism, and a pair of molds including the upper mold and the lower mold are mounted and fixed, and between the stations. A movable mold moving table, and a mold clamping unit rail that is attached to a mold clamping fixed plate of the injection station and forms a guide when the mold moving table is moved in and out of the take-out station; The above A mold opening / closing section rail which is attached to a fixed plate for mold opening / closing of a delivery station and forms a guide part when the die moving table is moved in and out of the injection station, and the die moving table on each of the rails. And a moving means for moving the die moving table.

The clamping plate for mold clamping is formed in a shape having two grooves in cross section, and is arranged so that the end faces of this cross section face each other in the entrance direction of the mold moving table. ,
A load holding mechanism that is arranged in parallel in the two grooves of the mold clamping plate and holds the lower surface of the mold moving table at a higher position than the upper surface of the stationary plate when the mold moving table is mounted. When the movable plate for mold clamping is operated, the lower surface of the mold moving table may be brought into contact with the upper surface of the fixed plate to receive the mold clamping force by the fixed plate for mold clamping.

The load holding mechanism has a supporting means for elastically supporting the lower surface of the rail vehicle body forming the mold clamping section rail, and the height of the upper surface of the rail main body when the mold moving table is mounted is such that the mold opening and closing is performed. The adjusting means is provided so as to be the same as the upper surface of the rail.

The upper die holding mechanism may be configured such that the upper die can be attached to and detached from the movable platen for opening and closing the die.

An ejector mechanism may be provided for separating the cast product from the upper mold. A hydraulic cylinder may be used as the load holding mechanism.

As the upper die holding mechanism, a clamp mechanism operated by a pneumatic cylinder or a hydraulic cylinder can be used.

[0015]

According to the present invention, the mold opening / closing mechanism, the movable plate for mold opening / closing and the upper mold holding mechanism are provided on the fixed plate for mold opening / closing of the ejection station adjacent to the injection station, and the fixed plate for mold opening / closing is further provided. In the configuration in which the mold is mounted via the mold opening / closing section rail and the mold moving table, the upper mold holding mechanism is operated to attach the upper mold to the mold opening / closing movable plate, and then the mold opening / closing movable plate is moved. Lift and open the mold. A mold release agent is applied to the inner surface of the mold by a spray device (not shown).

After applying the release agent, the movable plate for opening and closing the mold with the upper mold is lowered to temporarily clamp the mold, and then the upper mold holding mechanism is released to move the movable plate for opening and closing the mold and the upper plate. Unlink the type.
This completes the preparation for the die delivery at the take-out station.

After preparation for the die delivery, the die moving table on the die opening / closing section rail on which the die is mounted is slid onto the die clamping section rail in the injection station by the moving device to enter the die clamping stationary platen. Let

In the injection station, the movable plate for mold clamping is lowered to perform the main mold clamping and the molten metal is supplied into the injection sleeve. In that case, the upper end surface of the plunger tip in the injection sleeve is positioned near the opening position of the injection sleeve immediately before pouring from the ladle, and hot water was supplied into the injection sleeve due to the inclination of the ladle. Depending on the amount of the molten metal, it is gradually moved downward, and when the hot water supply is completed, the plunger tip at that point shifts to the original injection operation and is injected into the cavity. Here, it is also possible to simultaneously operate a squeeze mechanism for locally pressing the inside of the cavity in the movable plate for mold clamping.

In the other take-out station outside the injection station during the main mold clamping / casting, the other die is prepared for delivery.

When the cooling and solidification after the main mold clamping is finished, the movable plate for mold clamping is raised, and the mold moving table slides on the mold clamping section rail by the operation of the moving device with the mold mounted. It moves backwards and is moved onto the mold opening / closing rail of the original take-out station.

In the original take-out station, the upper mold holding mechanism is operated to clamp the upper mold on the movable plate for opening and closing the mold, and then the movable plate for opening and closing the mold is raised to open the mold.

Next, the cast product is extruded by the ejector mechanism built in the movable plate for mold opening and closing, and the cast product is taken out from the take-out station by a not-shown product take-out device.

When one mold is working at the take-out station, the other mold is cooled and solidified after the main mold clamping / casting on the injection station.

The above cycle constitutes the casting process. When repairing the mold or exchanging it with another mold, the mold can be taken out of the unloading station as needed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a die casting apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. Note that the same numbers are assigned to the same components in the left and right take-out stations.

FIG. 1 shows a front view of an embodiment of a mold casting apparatus according to the present invention, in which an injection station 1 is arranged in the center and take-out stations 2 and 2'are arranged on both sides of the injection station 1. As shown in FIG. Has become.

The injection station 1 is a vertical mold clamping device similar to the conventional shuttle mold casting device, as shown in FIG. 3 (a) as a sectional view taken along the line AA. In the injection station 1, a fixed plate 4 for mold clamping and a movable platen 7 for mold clamping are provided so as to face each other, and a mold clamping mechanism 6 allows movable mold clamping in the axial direction (the vertical direction in the drawing is hereinafter referred to as the axial direction). The plate 7 is moved downward to clamp a pair of molds 17 composed of an upper mold 16 and a lower mold 14 on the mold moving base 11 in the axial direction, and the mold clamping axis is formed. Are arranged in the vertical direction so that they are vertical. An injection device 3 is provided below the injection station 1 to inject the molten metal in the mold clamped state.

As shown in FIG. 3 (b), the fixed plate 4 for mold clamping is formed so that its cross section has two grooves 35.
In the direction perpendicular to the paper surface of
Is located in. The mold clamping fixed plate 4 is mounted with the mold clamping portion rail 5 and is paired with the mold clamping movable plate 7 so that the mold clamping mechanism 6 performs the mold clamping in the axial direction. The mold clamping portion rail 5 contracts, and as a result, the upper surface of the mold clamping stationary platen 4 and the mold moving base 11 are joined to each other so that the mold clamping is performed.

The mold clamping movable platen 7 is integrally mounted with the mold clamping mechanism 6 so as to be able to move up and down so as to face the mold clamping stationary platen 4 and clamp the mold 17 in the axial direction.

The mold 17 is mounted and fixed on the mold moving table 11 in a pair with an upper mold 16 and a lower mold 14 which form a movable mold and a stationary mold, and the lower part of the lower mold 14 is ejected at the time of injection. Is injected through.

As shown in FIG. 2, the mold moving table 11 mounts and fixes the mold 17 and slides the injection station 1 and the take-out station 2 on the mold opening / closing rail 10 and the mold clamping rail 5. Moving. The drive source of the die moving table 11 is a hydraulic cylinder 24 provided in the take-out station 2.
The tip of the piston rod 32 of the hydraulic cylinder 24 is connected to the members 32a protruding to both end portions of the die moving table 11, so that the die moving table 11 is moved integrally with the movement of the piston rod 32. There is.

Further, at the time of movement, the lower surface of the die moving table 11 is separated from the upper surface of the stationary platen of the stationary platen 4 for clamping to facilitate sliding. Further, at the time of mold clamping, since the mold clamping force is large, the spring 19 contracts, so that the lower surface of the mold moving table 11 is in close contact with the upper surface of the stationary platen of the stationary platen 4 for clamping and the entire surface of the mold is closely adhered. It is configured to withstand the tightening force.

The mold clamping part rail 5 is provided with the groove 3 of the mold clamping fixing plate 4.
5, the rail main body 5b that is in contact with the lower surface of the mold moving table 11 is elastically supported by the spring 19 as shown in FIG. Further, the rail main body 5b is fixed to the mold clamping fixing plate 4 by bolts 5a provided at a plurality of locations on the center thereof. At this time, the height of the upper surface of the rail body 5b which is crimped to the fixing member 34 is fixed to the fixing member 34 when the die moving table 11 having the die 17 mounted and fixed on the rail body 5b is mounted. The height of the upper surface of the mold opening / closing section rail 10 can be made equal by moving the bolt 5a up and down for adjustment. Therefore, the mold clamping unit rail 5 and the mold opening / closing unit rail 10 are smoothly joined, and the mold moving table 11 can slide.

Here, the spring 19, the bolt 5a, the fixing agent 34 and the rail main body 5b constitute the mold clamping portion rail in the present invention, and the bolt 5a, the spring 19 and the fixing agent 34 are the same. It constitutes a load holding mechanism for the rail body 5b in the invention.

As the load holding mechanism, the spring 19,
A hydraulic cylinder may be used in place of the bolt 5a and the fixing member 34, and the tip of the piston rod may support the rail main body 5b and the die moving base 11 on the rail main body 5b from below.

The injection device 3 is, as shown in FIG.
The molten metal supplied from the molten metal holding furnace 30 to the injection sleeve 33 via the electromagnetic pump 31 is injected into the mold 17 from below.

On the other hand, in the take-out station 2, as shown in the sectional view taken along the line BB in FIG. 4, after cleaning the inside of the mold and applying the mold release agent, the mold is temporarily clamped and the injection station 1 is set. On the other hand, the mold is sent out, while the cast product after injection and cooling and solidification is taken out.

In the take-out station 2, a fixed plate 8 for opening and closing the mold and a movable plate 13 for opening and closing the mold are provided so as to face each other, and the movable plate 13 for opening and closing the mold is moved axially downward by the mold opening and closing mechanism 12. A pair of molds 1 including a mold 16 and a lower mold 14.
7 is clamped in the axial direction or moved in the upward direction to move the upper mold 1
6 is moved in the vertical direction so that the mold clamping axis is vertical.

A die opening / closing part rail 10 is installed on the upper surface of the die opening / closing fixed plate 8 and faces the die opening / closing movable plate 13. In that state, the upper surface of the mold opening / closing section rail 10 and the lower surface of the mold moving table 11 are configured to be joined.

The movable platen 13 for opening and closing the mold is provided with an ejector mechanism 27 on the upper part thereof, and is provided with upper die holding mechanisms 25 at both ends, and is opposed to the fixed platen 8 for opening and closing the mold to be integrated with the mechanism 12 for opening and closing the mold. It is equipped so that it can be raised and lowered. Then, by moving downward, the die 17 is temporarily clamped in the axial direction, the upper die 16 clamped by the upper die holding mechanism 25 is moved upward, and the ejector mechanism 27 attaches the upper die 16 to the casting. Take out the goods.

The ejector mechanism 27 is used to separate the cast product from the upper mold 16 moved upward.

The upper mold holding mechanism 25 presses the upper mold 16 against the movable plate 13 for opening and closing the mold by using a clamp mechanism so as to be movable together with the movable platen for opening and closing the mold 13. Although not shown, as the clamp mechanism, for example, a clamp piece utilizing the action of a lever is rotatably provided on a fixed shaft, and by pressing one end of the piece with the cylinder rod tip,
The other end of the bridge may be configured to press the lower surface of the upper end of the upper die about the rotation axis. At this time, the piece may be moved outward from the lower surface after the clamp is released so that the piece does not collide with the lower surface of the upper mold when the movable plate moves up and down.

Further, the clamp mechanism is a movable platen 1 for opening and closing the mold.
Four pieces are installed on each side, two pieces on each side, and the upper part of the upper die 16 is clamped at four points by using a driving force of a hydraulic cylinder or the like to be fixed to the die opening / closing movable plate 13. The clamp mechanism does not need to be installed in the injection station 1 because the mold opening and closing is performed only in the ejection stations 2 and 2 '.

In FIG. 3, the injection sleeve 33 at the upper end of the injection mechanism below the injection station 1 is fixed, and the electromagnetic pump 31 is attached to the side wall thereof. In the case of supplying the molten metal into the injection sleeve by such an electromagnetic pump system, the upper end surface of the plunger tip is usually pre-positioned immediately below the position where the hot water supply pipe of the electromagnetic pump 31 and the injection sleeve intersect with each other. The molten metal in the injection sleeve 33 collects above the upper end surface of the plunger tip when there is no hot drop, and there is no drop 1 as shown in FIG. However, in another embodiment of the present invention shown in FIG. 6, the injection sleeve SL and the plunger rod PRD injection drive unit INJ are tilted during pouring, and the molten metal is melted from the ladle LD in the posture of the injection sleeve SL as shown by the alternate long and short dash line on the right side. ML is supplied with hot water. In this case, the upper end surface of the plunger tip PT is positioned near the upper end opening of the injection sleeve SL. This will reduce the head as much as possible. And Ladle LD
By moving the plunger tip PT in the direction of the arrow according to the amount of molten metal poured, it is possible to minimize the foaming of the molten metal and thus the entrainment of air. The position of the upper end surface of the plunger tip of
Since it is located higher than in the case of FIG. 8, the filling rate of the molten metal is also improved.

FIG. 7 is a block diagram of an injection speed control section for controlling the operation of the injection drive section INJ shown in FIG. In FIG. 7, 101 is a block diagram showing a simplified injection control unit, 101A is a data memory for storing command values such as low speed, high speed, and pressure control related to the original injection control, and 101B is a command procedure. Program memory,
Reference numeral 101C is a central processing unit, and 101D is a command value data memory relating to the position of the upper end surface of the plunger tip when pouring molten metal into the injection sleeve of the present invention. 101E
Is an input / output unit. In addition to the conventional command signal SGL to the injection drive unit INJ, the operation command signal of the plunger tip when pouring the molten metal into the injection sleeve as shown by the dotted line is shown separately with the dotted line.

In order to create the contents of the data memory 101D more accurately in advance, the amount of molten metal corresponding to the tilting motion of the ladle is simulated in advance to create plunger tip position data corresponding to the tilt angle position of the ladle. Is possible. Further, as shown in the figure, the actual inclination angle of the ladle can employ data from an encoder or the like connected to the servo motor for ladle rotation. Of course, if the pouring amount is substantially constant per unit time, the plunger tip PT can be lowered at a constant speed.

[0047]

According to the present invention, since the position of the plunger tip in the vertical type injection device is moved downward from the ladle into the injection sleeve during pouring, air is not trapped in the injection sleeve. It is possible to reduce the number in an absorptive manner and to reduce the porosity of the cast molded product. Further, the mold casting apparatus according to the present invention is provided with a mold opening / closing fixed plate on each of left and right sides of an injection station equipped with an injection device, a mold clamping fixed plate, and a mold clamping movable plate that is moved up and down by a mold clamping mechanism. In a die casting machine equipped with a take-out station equipped with a die opening / closing movable plate that is moved up and down by a die opening / closing mechanism, a die moving table on which a pair of die consisting of a lower die and an upper die is mounted and fixed. It can be placed on the mold opening / closing rail provided on the mold opening / closing fixed board, and can be individually put in and taken out from the left and right sides on the mold clamping fixed board via the mold closing rail provided on the mold closing stationary board. Since it has a simple structure and a small mold moving device, it does not stop the device even when the mold is repaired or replaced, and when one of the take-out stations fails, It can be used during repair and replacement.
Further, what moves between the stations is a mold moving table on which a mold is mounted and fixed, and there is no mold opening / closing mechanism, so that the structure can be downsized and simplified.

Further, since the die moving table only supports the weight of the die, the die moving table has a minimum necessary structure and the die moving table itself can be downsized.

Further, since the pair of miniaturized upper and lower molds and the mold moving table only move integrally, the moving device and the supporting portion are less consumed and the life of the device is extended.

In addition, it is sufficient to fix the hydraulic hose so as not to move the temporary mold clamping device, which solves problems such as wiring of the moving hose and interference between the moving hose and other parts. .

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a die casting apparatus according to the present invention.

FIG. 2 is a view of an embodiment of the mold casting apparatus according to the present invention as seen from the upper surface of the mold moving table.

FIG. 3 is a sectional view taken along line AA of the injection station in the embodiment of the mold casting apparatus according to the present invention shown in FIG.

FIG. 4 is a sectional view taken along the line BB of the take-out station in the embodiment of the mold casting apparatus according to the present invention shown in FIG.

FIG. 5 is a detailed view of a load holding mechanism in the embodiment of the die casting apparatus according to the present invention.

FIG. 6 is a view showing a state of pouring the molten metal into the injection sleeve of the injection device in the lower part of the injection station of the mold casting device according to the present invention.

FIG. 7 is a block diagram of an injection control unit that controls an injection drive unit of the mold casting apparatus according to the present invention.

FIG. 8 is a view showing a state of pouring a conventional type ladle into the injection sleeve.

[Explanation of symbols]

1 injection station 2 take-out station 3 injection device 4 Fixed plate for mold clamping 5 Mold clamp rail 5a bolt 6 Mold clamping mechanism 7 Movable plate for mold clamping 8 type fixed plate for opening and closing 10 type opening / closing rail 11-type moving table 12-type opening / closing mechanism 13-type movable plate for opening and closing 14 Lower mold 16 Upper mold 17 Mold 19 spring 24 hydraulic cylinder 25 Upper die holding mechanism 27 Ejector mechanism 30 Molten metal holding furnace 31 Electromagnetic pump 32 piston rod 32a member 33 injection sleeve 34 Fixing member 35 groove 101 injection control unit LD Ladle PT Praja Chip INJ injection drive

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29C 45/04 B29C 45/04 45/53 45/53 45/77 45/77

Claims (9)

[Claims] 1. An injection sleeve in which the molten metal is supplied from a molten metal supply means prior to injecting a predetermined amount of the molten metal into a pair of molds from below, and the injection sleeve is inserted into the injection sleeve so as to be capable of advancing and retreating, and at the tips. In the vertical mold casting apparatus equipped with an injection device having an injection plunger having a plunger chip attached thereto and an injection speed control unit for driving and controlling the injection speed of the injection plunger according to a pre-stored injection speed command, The speed controller has a means for instructing the plunger tip position during hot water supply so as to move the position inside the sleeve of the plunger tip downward according to the amount of hot water being supplied from the melt supply means into the injection sleeve. A die casting machine characterized by having. 2. The mold casting apparatus according to claim 1, wherein the molten metal supply means has a ladle for containing the molten metal. 3. The injection device for injecting and filling the molten metal from below into a pair of metal molds comprising an upper mold and a lower mold that form a movable mold and a stationary mold, and the vertical metal casting device. An injection station equipped with a mold clamping fixed plate for a pair of molds and a mold clamping movable plate that can be raised and lowered by a mold clamping mechanism, and a mold opening / closing fixed plate provided adjacent to each of the injection stations and the upper mold. For moving a mold, which is equipped with a take-out station equipped with a movable plate for mold opening / closing that can be mounted and moved up and down by an opening / closing mechanism, and which is mounted and fixed with a pair of molds consisting of the upper mold and the lower mold. A table, a mold clamping rail that is attached to a mold clamping fixed plate of the injection station and forms a guide when the mold moving table is taken in and out of the take-out station, and mold opening and closing of the take-out station Die opening / closing part rail attached to a stationary platen for forming a guide part for moving the die moving table into and out of the injection station, and a die moving table for moving the die moving table on each rail. The mold casting apparatus according to claim 1, comprising a table moving means. 4. The mold clamping plate is formed so that its cross section has two grooves, and is arranged such that the end faces of this cross section face each other in the approach direction of the mold moving table. The rails are arranged in parallel in the two grooves of the fixed plate for mold clamping, and when the mold moving table is mounted, the rail holds the lower surface of the mold moving table at a position higher than the upper surface of the fixed plate. A mechanism is provided, and the lower surface of the mold moving table is brought into contact with the upper surface of the fixed plate when the movable plate for mold clamping is operated, so that the fixed plate for mold clamping receives the mold clamping force. The mold casting apparatus according to claim 3, which is characterized in that. 5. The load holding mechanism has a supporting means for elastically supporting a lower surface of a rail main body that constitutes the mold clamping section rail, and the height of the upper surface of the rail main body when the mold moving table is mounted is the above-mentioned. The mold casting apparatus according to claim 4, further comprising adjusting means for adjusting the mold opening / closing section to be the same as the upper surface of the rail. 6. The upper die can be attached to and detached from a movable plate for opening and closing the die by an upper die holding mechanism.
The die casting apparatus according to any one of 1 to 5. 7. The mold casting apparatus according to claim 3, further comprising an ejector mechanism for separating the cast product from the upper mold. 8. The mold casting apparatus according to claim 3, wherein the load holding mechanism uses a hydraulic cylinder. 9. The mold casting apparatus according to claim 3, wherein the upper die holding mechanism uses a clamp mechanism that is operated by a pneumatic or hydraulic cylinder.