JP2003010954A - Casting equipment for mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide casting equipment for a mold provided with a mold moving device simple in construction and compact, and not stopping the equipment even in repairing and exchanging the mold. SOLUTION: The casting equipment comprises an injection station 1 equipped with an injection device for injection-filling a molten metal from the lower part into a pair of molds 17 composed of a cope and a drag constituting the molds on the moving side and the stationary side, a clamping movable board 7 liftable by a clamping stationary board 4 and a clamping mechanism 6 for the pair of molds 17, taking out stations 2, 2' which are provided respectively adjacent to the injection station, equipped with clamping boards 8 and the copes 16, and equipped with a movable board 13 for mold opening/closing liftable by mold opening/closing mechanisms 12, a mold moving stand 11 which mounts and fixes a pair of molds 17 comprising the copes 16 and the drags and an ejector mechanism, and is movable between each station, rails for moving, and a moving means.

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,
Since two sets of mold opening / closing units are mounted on one carriage, there is a problem that if one mold opening / closing unit fails, the entire casting apparatus cannot be used during repair and 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] Actual Kaihei 5-30841
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.

Therefore, an object of the present invention is to provide a die casting apparatus having a die moving apparatus having a simple structure and a small size, which does not stop the apparatus even when the die is repaired or replaced. .

[0007]

In order to solve the above-mentioned problems, a mold casting apparatus according to the present invention includes a pair of molds including an upper mold and a lower mold which form a movable mold and a stationary mold. An injection station equipped with an injection device for injecting and filling molten metal from below, a fixed plate for mold clamping for the pair of molds, and a movable plate for mold clamping that can be moved up and down by a mold clamping mechanism, and adjacent to the injection station. A take-out station equipped with a fixed plate for mold opening and closing 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 and closing mechanism, and a pair of the mold including the upper mold and the lower mold, and the upper mold. Installed and fixed to the ejector mechanism that separates the cast product from the upper mold, and is attached to the mold moving table that can move between the stations and the mold clamping fixed plate of the injection station. A mold clamping rail that forms a guide when the mold moving table is moved in and out of the take-out station; and a mold moving table that is attached to the mold opening / closing fixed plate of the take-out station and the injection station. It comprises a mold opening / closing section rail that forms a guide when inserting and removing between, and a moving means of the mold moving table that moves the mold moving table on each of the rails.

The clamping plate for mold clamping is formed so that its cross section has two grooves 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 body forming the mold clamping 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 / closing is performed. The adjusting means is provided so as to be the same as the upper surface of the partial rail.

The upper die holding mechanism may be configured such that the ejector mechanism and the upper die can be attached to and detached from the lower surface of the movable plate for opening and closing the die.

An ejector mechanism for separating the cast product from the upper mold may be provided. 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.

[0013]

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 move the upper mold and the ejector mechanism provided on the upper mold to move the mold. After mounting on the board, raise the movable plate for mold opening / closing to 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 mold. 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 on 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 and 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.

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

When the cooling and solidification after the main mold clamping is completed, the movable plate for mold clamping is raised, and the mold moving table is mounted on the mold clamping part rail by the operation of the moving device while the mold and the ejector mechanism are mounted. It slides back 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 and the ejector mechanism on the movable plate for mold opening / closing, and then the movable plate for mold opening / closing is lifted to open the mold.

Next, the cast product is extruded by the ejector mechanism provided at the lower part of the movable plate for mold opening and closing, and the cast product is taken out from the take-out station by a product take-out device (not shown).

When one mold is working at the take-out station, the other mold is clamped on the injection station by the main mold.
Cooling and solidification after casting is performed.

The above cycle is the casting process. When repairing the mold or exchanging it with another mold, the mold can be taken out of the unloading station if necessary.

[0023]

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. In addition, the same numbers are given 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. 3A 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 move a pair of molds 17 composed of the upper mold 16 and the lower mold 14 and an ejector mechanism 27 (the details are shown in FIG. 6 described later) formed on the upper part of the mold 16 for mold movement. The mold is configured to be clamped in the axial direction while being mounted on the table 11, and is arranged in the vertical direction so that the mold clamping axis is 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 mold clamping platen 4 is formed to have a cross section having 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 movable up and down so as to face the mold clamping fixed plate 4 and clamp the mold 17 in the axial direction.

The mold 17 is mounted and fixed on the mold moving base 11 as a pair of an upper mold 16 and a lower mold 14 which constitute a movable mold and a fixed 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 die moving table 11 includes a die 17 and an ejector mechanism 2 provided on the upper die.
7 is mounted and fixed, and the injection station 1 and the take-out station 2 are slidably moved on the mold opening / closing part rail 10 and the mold clamping part rail 5. A drive source of the die moving table 11 is a hydraulic cylinder 24 provided in the take-out station 2, and a tip of a piston rod 32 of the hydraulic cylinder 24 is connected to a member 32a protruding to both ends of the die moving table 11. The die moving base 11 is moved integrally with the movement of the piston rod 32.

Further, at the time of movement, the lower surface of the mold moving table 11 is separated from the upper surface of the fixed plate of the mold clamping fixed plate 4 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 stationary platen 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 member 34 and the rail body 5b constitute the mold clamping portion rail in the present invention, and the bolt 5a, the spring 19 and the fixing member 34 in the present invention. A load holding mechanism for the rail body 5b is configured.

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 FIG. 4 as a cross-sectional view taken along the line BB, after cleaning the inside of the mold and applying the mold release agent, the mold is temporarily clamped, the mold is delivered to the injection station 1, and the other is injected and cooled. It is designed to take out the cast product after solidification.

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 by the mold opening and closing mechanism 12 to move upward. A pair of molds 17 including a mold 16 and a lower mold 14 is configured to be axially clamped or moved upward to move the upper mold 16, so that the mold clamping axis is vertical. It is arranged in the vertical direction.

A die opening / closing section 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.

An ejector mechanism 27 is arranged at the upper part of the lower part of the mold opening / closing movable plate 13, and upper mold holding mechanisms 25 are provided at both ends of the movable platen opening / closing plate 13 so as to face the mold opening / closing fixed plate 8 and to open the mold opening / closing mechanism. It is equipped with 12 so that it can be raised and lowered. Then, the mold 17 is temporarily clamped in the axial direction by moving downward, and the upper mold 16 and the ejector mechanism 27 clamped by the upper mold holding mechanism 25 are moved upward, and the upper mold is ejected by the ejector mechanism 27. The cast product adhered to 16 is taken out.

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

FIG. 6 shows details of the ejector mechanism 27 located at the take-out station 2. The upper body 101 of the ejector mechanism 27 is clamped on the lower surface of the movable plate 13 by the clamp mechanism 25.
An extrusion cylinder 121 is provided inside. A plate 122 is fixed to the lower end portion of the rod of the pushing cylinder 121, and the plate 122 is the pushing rod 125.
The head of the push rod 125 is fixed by both the plates 122 and 123 when the head of the push rod 125 is horizontally moved to a predetermined position by locking the head of the push rod 125 (the drive portion is omitted).

Reference numeral 126 serves as a vertical guide for the extrusion rod 125, and is fixed to the upper die 102 forming the upper die 16 by screws 127. Also, push rod 1
The lower end of 25 is fixed to an extruding plate 128 which can slide up and down in the upper mold 102, and the extruding plate 128 is always biased upward by a pin and a spring 130. 12
Reference numeral 9 denotes an extruding pin, the upper end of which is fixed to the extruding plate 128.

102, 103, 104, 105, 106
Are metal molds that form the upper mold 16. While 10
Reference numerals 7, 108, 109, 110 and 111 denote respective metal molds that form the lower mold.

The cast product W is a wheel for an automobile, which is molded and solidified at the injection station 1 immediately before. A rod 120A extending downward of the cylinder 120 is connected to a punching pin 124 through a connecting portion, and the lower end of the pin 124 moves downward along with R to the extruded portion remaining in the punching gate portion at the center of the wheel casting W. It is designed to stick out.

When the movable platen 13 rises, the upper body 101,
Upper mold 102 and each mold 103, 104, 105, 1
06 will rise together. The outer surface of the wheel W is separated from the molds 109 and 107 that form the lower mold 14. When the push-up cylinder 121 is driven, the push-out plate 128 and the push-out pin 129 are lowered when the push-up cylinder 121 is moved to a predetermined height position, and the wheel W is separated from the molds 105 and 106. The one-dot chain line below the riser R shows the injection sleeve 33 at the injection station and the upper end position of the plunger tip when the injection is completed.

The clamp 25A clamps the upper main body 101 and the upper mold 102, and for example, the clamp mechanism 25.
However, other methods may be used.

In the example of FIG. 6, the clamp 25A is unclamped when the molds 14 and 16 are replaced with another pair of molds. That is, the clamp 25A is used when the molding operations of the cast products are continuously performed one after another.
Is held in the clamped state.

Reference numeral 27A in FIG. 6 constitutes an extruding plate unit 27A composed of an extruding pin 129, a pin and a spring 130, an extruding plate 128, an extruding rod 125 and the like housed in the upper mold 102. 27A is a cast product W
Has corresponding dimensions and related positions (for example, the position of the extruding pin 129) and is changed when the molds 14 and 16 are replaced with another mold for casting. However, it is not necessary to change the cylinder 121, the plates 122, 123, etc. housed in the upper main body 101 in order to fulfill the ejector function even if the mold is changed. 101A is an electromagnetic switching valve for each cylinder 1 housed in the upper main body 101.
The operation of 20,121 is performed. In that case, although not shown, the electromagnetic switching valve 1 is provided inside the upper main body 101.
A hydraulic passage communicating with 01A is formed. The supply of the pressure oil to the electromagnetic switching valve 101A is connected to the pressure oil source and the tank via a flexible hose.

The upper die holding mechanism 25 uses the clamp mechanism 25 to move the extrusion cylinder unit 27B of the ejector mechanism 27 previously attached to the upper die 16 by using the clamp mechanism 25.
To move together with the movable plate 13 for opening and closing the mold. Although not shown in detail, as a clamp mechanism, for example, a clamp piece utilizing the action of a lever is rotatably provided on a fixed shaft, and one end of the piece is pressed by a cylinder rod tip to thereby The other end portion 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 25 is a movable platen 1 for opening and closing the mold.
3 are installed on each side, 2 on each side, 4 on each side.
It is clamped at a point and fixed to the movable platen 13 for opening and closing the mold. Since the mold opening and closing of the clamp mechanism 25 is performed only at the take-out stations 2 and 2 ′, the clamp mechanism does not need to be installed at the injection station 1.

[0049]

The mold casting apparatus according to the present invention is equipped with an injection device, a fixed plate for clamping and a movable plate for clamping that is moved up and down by a clamping mechanism, on both left and right sides of an injection station.
In a mold casting apparatus provided with a take-out station equipped with a fixed plate for opening and closing a mold and a movable plate for opening and closing the mold that is moved up and down by a mold opening and closing mechanism, a pair of a mold and an ejector mechanism including a lower mold and an upper mold. Mount the fixed mold moving table on the mold opening / closing rail provided on the fixed plate for mold opening / closing,
Since the mold clamping rails provided on the mold clamping fixed plate can be individually put in and taken out from the right and left sides of the mold clamping fixed plate, a mold moving device having a simple structure and a small size can be provided. However, even if the mold is repaired or replaced, the device will not be stopped, and if one of the ejection stations fails,
It can be used during its 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 weight of the die and the ejector mechanism is only supported, 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.

Moreover, since the temporary mold clamping device does not move, it is sufficient to fix the hydraulic hose, which solves problems such as wiring of the moving hose and interference between the moving hose and other parts. In addition, the ejector mechanism is equipped with a cylinder for extrusion and an extrusion plate unit integrally on the die moving table, and the ejector mechanism at the take-out station only needs to supply pressure oil, which shortens the cycle time. Be useful.

[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 cross-sectional view of an injection station in an embodiment of the mold casting apparatus according to the present invention.

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

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 detailed view of an ejector mechanism in the embodiment of the die casting apparatus according to the present invention.

[Explanation of symbols]

1 Injection Station 2 Extraction Station 3 Injection Device 4 Mold Clamping Fixed Plate 5 Mold Clamping Rail 5a Bolt 6 Mold Clamping Mechanism 7 Mold Clamping Movable Plate 8 Mold Clamping Plate 10 Mold Opening / Closing Rail 11 Mold Moving Stand 12 Model Open / close mechanism 13 Movable plate 14 for opening / closing the mold Lower mold 16 Upper mold 17 Mold 19 Spring 24 Hydraulic cylinder 25 Upper mold holding mechanism 27 Ejector mechanism 27A Extrusion plate unit 27B Extrusion cylinder unit 30 Molten metal holding furnace 31 Electromagnetic pump 32 Piston rod 32a Member 33 injection sleeve 34 fixing member 35 groove 101 upper body 101A electromagnetic switching valve 102 upper mold 103, 104, 105, 106, 107, 108, 1
09 mold 120 cylinder 121 extrusion cylinders 122 and 123 plate 125 extrusion rod 128 extrusion plate 129 extrusion pin 130 pin and spring

Claims (7)

[Claims] 1. An injection device for injecting and filling a molten metal from below into a pair of molds composed of an upper mold and a lower mold constituting movable and stationary molds and a fixed plate for clamping the molds. And an injection station equipped with a movable mold clamping plate that can be moved up and down by a mold clamping mechanism, and a mold that is provided adjacent to each of the injection stations and is equipped with the mold opening / closing fixed plate and the upper mold and that can be moved up and down by the opening / closing mechanism. A take-out station equipped with a movable plate for opening and closing, a pair of molds composed of the upper mold and the lower mold, and an ejector mechanism provided on the upper mold for separating a cast product from the upper mold are mounted and fixed, and A mold moving table movable between the stations and a guide part for attaching and removing the mold moving table to and from the take-out station, which is attached to the mold clamping fixed plate of the injection station. A mold clamping part rail, a mold opening / closing part rail attached to a mold opening / closing fixed plate of the take-out station to form a guide part when the mold moving table is taken in and out of the injection station, and the mold moving part rail. A die casting apparatus comprising a die moving table moving means for moving the table on each of the rails. 2. 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 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 1, which is characterized in that. 3. The load holding mechanism has a supporting means for elastically supporting a lower surface of a rail body forming the mold clamping section rail, and the height of the upper surface of the rail body when the die moving table is mounted is the above-mentioned. The mold casting apparatus according to claim 2, further comprising adjusting means for adjusting the mold opening / closing portion to be the same as the upper surface of the rail. 4. The mold casting apparatus according to claim 1, wherein the ejector mechanism and the upper mold can be attached to and detached from the lower surface of the movable plate for mold opening / closing by an upper mold holding mechanism. 5. An ejector mechanism for separating a cast product from an upper die, and an extruding plate unit, which is provided corresponding to the cast product formed by the pair of molds, to which an extruding pin can be attached; An extrusion cylinder unit is provided, which is vertically slidably housed in the upper part of the mold and is detachably connected to the extrusion plate unit and internally formed with an extrusion cylinder for moving the extrusion plate unit. Item 5. The mold casting apparatus according to any one of Items 1 to 4. 6. The mold casting apparatus according to claim 2, wherein the load holding mechanism uses a hydraulic cylinder. 7. The mold casting apparatus according to claim 1, wherein the upper die holding mechanism uses a clamp mechanism that is operated by a pneumatic or hydraulic cylinder.