JPS58103951A - Casting machine for die casting - Google Patents

Abstract

PURPOSE:To improve cutting of molten metal and to improve the cooling efficiency for dies by sliding a movable die plate back and forth with respect to a horizontal stationary die plate in which an injection hole for molten metal is penetrated, and making said injection hole closable with the sliding surface. CONSTITUTION:An injection hole 6e which is penetrated in a stationary die plate 6 above a base metal melting furnace in the thickness direction of said plate is communicated with an injection opening 5a of a nozzle 5 mounted with the preceding end of the runner for injecting the molten metal with an injecting cylinder. A movable die plate 7 having a sliding surface in sliding contact with the sliding surfaces 6b, 6c of the plate 6 is movable back and forth (perpendicularly to the plane of the figure), and a die 9 and a core inserting and pulling device are placed thereon. The plate 7 is advanced to the charging position where the hole 6e and the opening 10a of the cavities 10 of the die 9 are communicated, then molten metal is injected through the opening 5a. Upon completion of the injection, the plate 7 is retreated to the removal position and the products are removed. Here, the opening 10a and the hole 6e are closed by the sliding surfaces of the plates 6, 7, by which the cutting of the molten metal is improved and the leakage of the molten metal is obviated. The die 9 is separated from a nozzle 5 and the cooling efficiency of the dies is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the structure of a casting machine for die casting using zinc alloy or the like.

Conventionally, various casting machines for die-casting zinc alloys and the like have been known, but they have had the following problems. - When casting low melting metals such as zinc alloys, the area from the melting furnace to the injection nozzle is heated so that the molten metal is press-fitted into the mold in a good state, so the metal is in contact with the nozzle. There is a problem with the cooling efficiency of the mold in those that cool the mold, and for this reason, a device that separates the mold from the nozzle is used, but the connection between the injection opening of the nozzle and the cavity opening of the mold is The molten metal does not cut well between the holes, and burrs form at the injection opening and the cavity opening, making it necessary to remove the burrs.

(2) Conventional #$,! Samurai's J de l, inserting the core.
Relation to F1, in which drawing is performed using the mold opening and mold clamping force of the mold, the core insertion/pulling equipment was housed inside the mold, so the drawing direction of the core changed and the number of cores drawn was changed. When there are many
As molds become larger, even if the projected area and volume of the cast product are approximately the same (that is, the mold clamping force is approximately the same), the punching direction changes or the number of punches increases. There are cases where a large machine has to be used, which has the disadvantage of requiring high equipment costs.

(3) With conventional molds, when changing the direction or number of cores to be removed, the mold must be completely remanufactured because the core insertion/extraction device is housed within the mold. mosquito,
Even if a part is to be remanufactured, it is often necessary to remanufacture a considerable portion, which has the disadvantage of increasing mold costs.

(4) With conventional molds, when changing the direction or number of cores to be punched, the entire mold must be replaced, which is disadvantageous in that it takes a lot of setup time.

(5) In conventional molds, unnecessary parts other than the product such as runners and sprues, so-called return materials, are generated, which poses a problem in terms of resource and energy conservation.

(6) In a conventional casting machine, the heat required to heat the furnace is
Since it was discharged to the outside as it was, there was also a problem from the aspect of energy conservation.

The present invention was made in view of Problem F, and it is possible to improve the drainage of hot water between the injection opening of the nozzle and the cavity opening of the mold, and to separate the mold from the nozzle without causing any cracks. It is possible to improve the cooling efficiency of the mold, and even if the welding direction of the core or the number of cores to be punched changes, there is no need to unnecessarily increase the size. It is an object of the present invention to provide a die-casting machine that allows easy setup when changing the die-casting machine, generates almost no return material, and makes effective use of exhaust gas.

For this reason, in the present invention, the melting furnace has an injection hole which is fixed horizontally above and penetrates in the direction of the nozzle so as to be able to communicate with the injection opening of the nozzle, and whose L side 1 is the sliding surface. A fixed die plate is formed on the fixed die plate, and a sliding surface is formed on the lower surface of the fixed die plate to be in sliding contact with the sliding surface of the fixed die plate and to form an interface with the lower surface of the mold. A movable die plate that can move the sliding surface of the fixed die plate L in one direction while holding the device;
With respect to the fixed die rate, at least the injection hole of the fixed die plate and the opening of the cavity of the mold are matched and the molten metal is poured into the cavity. The openings of the SaW iv, -/ are closed by sliding surfaces facing each other, and the product ejecting device closes the openings of the
A movable die plate sliding device that slides between a take-out position for taking out the product, and a sliding surface that faces the injection hole of the fixed die plate and the opening of the cavity, which communicate with each other at the pouring position. The opening of the capitei and the injection hole of the fixed die plate are properly drained, and the relationship between the two is severed.Furthermore, the exhaust gas that heated the furnace is removed from the nozzle. It is characterized by being reused for heating.

EMBODIMENT OF THE INVENTION Below, this invention is concretely demonstrated based on the Example of illustration.

Figure 1 shows the state in which the product is taken out. In the figure, 1 is a melting furnace arranged at the front of the machine frame 2 to melt the zinc alloy and maintain it in a molten state, and 3 is perpendicular to the melting furnace LL. A press-fit cylinder 6 is fixed horizontally to the machine frame 2 above the melting furnace 1, and is erected downward in the direction and pushes out the molten metal 4 in the melting furnace 1 from a nozzle 5 that projects upward from the rear of the melting furnace 1. A fixed die plate, 7 is a movable die plate that can slide the fixed die plate 6 and 1 in the front and rear directions, and 8 is a movable die plate that can move the movable die plate 7 to two positions in the front and back relative to the fixed die plate 6, that is, between the take-out position and the oil-lifting position. A movable die plate sliding cylinder 9 is held by the movable die plate 7 and has a cavity 10 for casting products in the vertical direction in the center, and a mold into which the core can be taken out. , 11 is
This is an eject pin that is fixed to the fixed die plate 6 and takes out the product from the cavity 10 of the mold 9. L
After inserting the core into the mold 9 at the take-out position shown in Figure 1,
The movable gouly plate 7 is slid on the fixed die plate 6 by the sliding cylinder 8 to the pouring position shown in FIG.
The molten metal 4 is press-fitted into the cavity 10 of. After press fitting, the movable guide plate 7 is slid to the removal position by the sliding cylinder 8, and the mold e is cooled down.
After the core is extracted, the product is extracted from the cavity 10 using an eject pin 11.

The extracted product 44 is pushed into a transport chuck 41 and transported to the next process, and the structure of this chuck is a chuck using a steel pole 42 and a spring 43, as shown in FIG. Various methods are possible, such as a chuck 41b using a plate hole 45 as shown in Figs. 41a and 8. In Figs. .

The melting furnace 1 is heated by a latent burner or the like,
Inside the furnace is a sleeve 1 with a molten metal inlet 12a on its side.
2 is vertically installed, and the front end is attached to the sleeve 1.
A gooseneck 13 is provided as a runner which communicates with the bottom of the furnace 1 and whose rear end is connected to a nozzle 5 that projects above the rear of the furnace 1. A blanker 3b provided at the tip of the rod 3a of the press-fit cylinder 3 is fitted into the sleeve 12, and the plunger 3b is moved up and down within the sleeve 12 by driving the press-fit cylinder 3, and the nozzle 5 is inserted through the gooseneck 13. The molten metal 4 is pushed out more. In the gooseneck 13, as shown in Figure 9, in the middle of the runner,
A "cutting board" 52 can also be provided to enhance the effect of the riser. Further, the melting furnace 1 is provided with a shielding plate 48,
The area surrounded by the lid 49 and the shielding plate 48 is sealed to prevent oxidation of the upper surface of the molten metal.

In addition, the exhaust gas that heated the melting furnace 1 is allowed to pass around the nozzle to heat the nozzle, as shown by the dashed line A in the steel sheet drawing, but this exhaust gas is passed through the chimney 5.
It can be adjusted by a damper 51 provided at 0. -F The melting furnace 1 has a fulcrum 1 at the upper front part thereof.
It is rotatably supported by a and also rotates on the rear bottom surface)
- It is supported by the shaft 14a of the handle 14, and the rotation
While the rotation can be adjusted by operating the handle 14, the shaft 15a of the horizontal movement handle 15 is rotatably fitted on the front surface, and by operating the handle 15, it is guided by a furnace guide member (not shown). Nozzle 5 can be adjusted back and forth.
It is possible to perform positioning with respect to the fixed die plate 6.

1. The fixed Goi plate 6 is provided with a convex portion 6a extending back and forth in the center of the rectangular plate in the width direction, and has a sliding surface 5 on each upper surface.
'b, 5c, and the U-shaped guide members 16.1 fixed to the machine frame 2 on both sides are fixed to the machine frame 2 as shown in FIG.
It is fitted and fixed in the guide grooves 16 a and 16 a of No. 6. A concave portion 6d is provided on the lower surface of the convex portion 6a, and an injection hole 6C is provided at the apex of the concave portion, and the conical portion at the tip of the nozzle 5 is inserted upward into the concave portion 6d. The injection opening 5a of the nozzle 5 is brought into close contact with the injection opening 5a of the nozzle 5. - An eject pin insertion hole 6f is provided at a predetermined distance behind the concave portion 6d of the convex portion 6a;
The eject pin 11 is freely movable downward within the insertion hole 6f by an eject pin drive cylinder 17, and the upper end surface of the eject pin is held flush with the sliding surface 6b of the convex portion of the fixed die plate 6.

On the other hand, the movable die plate 7 that slides on the fixed die plate 6 is provided with a concave groove 7a in the center of the substantially rectangular plate that fits into the convex part 6a of the fixed die plate 6, and a groove 7a on each lower surface. - Sliding surfaces 7b and 7C that slide on the sliding surfaces 6b and 6c of the fixed guide plate 6 are formed. Both sides of the movable guide plate 7 are -h-shaped guide members 16.
．． The tip of the piston 8a of the movable die plate sliding cylinder 8 fixed to the end of the machine frame 2f is fixed to the rear end of the movable die plate 7. Then, by driving the sliding cylinder 8, the guide member 16. is moved over the fixed die plate 6.
Guided by 16, the movable die plate 7 slides back and forth and hangs. In addition, -E guide member 16.1
At the front and rear of the guide grooves 16a and 16a of 6, there are stopper poles that can finely adjust the front end surface of the movable die plate 7).
The movable die plate 7 is positioned by providing a front stopper 18, 18 whose tip ends of 18a, 18a abut against the pouring position, and a rear stopper 19, 19 whose rear end surface abuts against the ejecting position. .

A circular recess 7d is provided at the center of the L surface of the movable die plate 7.
is provided, and the input piece main body 9a and the -E mold 9 are provided in the circular recess 7d.
A mold 9 consisting of b is arranged. The L combination type 90 inserting piece body 9a has, for example, 5 pieces perpendicular to the core insertion direction.
It is a prismatic body having two side surfaces, and a fitting protrusion 9C whose lower surface is flush with the sliding surface 7b of the concave groove 7a of the movable die plate 7 is provided at the lower part thereof. The mold 9 is removably attached to the movable die plate 7 by fitting into a fitting hole 7e provided in the groove 7a of the movable die plate 7 by tightening bolts or using a cam type clamp.

An opening 10a of a capity 10 provided with a center plate of the inserting piece body 9a is provided on the lower surface of the fitting protrusion 9C.
a can be communicated with the injection hole 6e of the fixed die plate 6.

The upper part of the inserting piece body 9a is connected to the core pin 21 from the center of the lower surface.
is covered with a hanging upper mold 9b, the core pin 21 is inserted into the cavity 10, and the upper end of the cavity 10 is closed.

The upper mold 9b has tie bars 22 vertically installed at the four corners of the movable die plate 7. . . , is supported at the center of the lower surface of the upper mold support plate 23, which is vertically movable downward by guides 22. On the surface of the upper mold support plate 231, the tie bars 22. ..., the tip of a piston 25a of a mold clamping cylinder 25 provided on the upper plate 24 fixed to the -L end of the core mold clamping cylinder 25 is connected, and the tie bar 22. ..., the core pin 2 of the upper mold 9b is guided by 22.
The core pin 21 is hung down and inserted into the cavity 10 of the inserting piece body 9a, or the E mold 9b is raised to extract the core pin 21 from the cavity 1.0.

Further, on the outside of the movable die plate chi 0 circular recess 7d, as shown in FIG. A mold-shaped groove 27 for driving the core is formed with a width of 26.26 mm.

A movable die plate 7 is provided in the L-shaped core drive groove 27.
As shown in FIG. 5, a drive ring 29 is slidably and rotatably provided via an annular collar 28, and has a spiral-shaped square screw 29a formed on its upper surface and toothed portions 29b formed on its outer surface. ing. A drive gear 31 connected to a core drive motor via a speed reducer 30 is engaged with the southern part 29b of the drive ring 29 to rotate the drive ring 29 in forward and reverse directions.

” - Between the two narrow annular grooves 26 for inserting bolt heads, the drive ring 29 is inserted between the groove walls and the earth surface of the groove 26.
The drawing device 20 adjusts the positions of the L-shaped core sliding member 32 and the inverted-shaped core feeding member 33 using the adjustment screw 34 provided at the rear end of the core feeding member 33, and then removes the bolts. 35.35
As shown in FIG. 6, their sides are slidably guided by a sliding guide member 36° 36, and an elongated hole 37a is provided to allow the head of the L port 35 to move. The upper cover 37 allows the guide member 36.36 to be moved 1. A fixing bolt 38 whose head is inserted into the bolt head insertion groove 26. . . . is fixed to the movable die plate 7 by 38. Further, the guide members 36, 36 can be fixed to the movable die plate by a clamp method (not shown) or the like.

The square screw 2 of the drive ring 29 is attached to the lower surface of the core feeding member 33.
One force 1. Providing 6 square threaded portions 33a that mesh with 9a. A large number of cores 39 are provided on the end surface of the front bent portion of the core sliding member 32.
．． . . , 39 are provided, and the bent lower surface of the die plate 7 is slidable on the upper surface of the circular recess 7d of the movable die plate 7.

Therefore, when the drive element 29 rotates, for example, counterclockwise in FIG. The core 39. is inserted into the cavity 10.
, 39 are inserted, and when the drive ring 29 rotates clockwise in the opposite direction, each core feeding member 33 retreats from the mold 9 and the cores 39 . ..., 39 is taken out.

In addition, 40 shown by a two-dot chain line in FIG. 4 is a wedge that fits into the recess 32a formed on the curved surface of the core sliding member 32 from the long hole 37a of the -L lid 37, and the core 39, ...,
39 is inserted into the cavity 10, and when the molten metal 4 is press-fitted into the cavity 10, the pressure of the molten metal 4 causes the core 39.・
..., 39 is applied in the direction in which it is pulled out from the cavity 10, this force is received by the L routing part 32a and the wedge 40, and the square screw part 33a of the core feeding member 33 and the drive ring 29
This is to prevent damage to the meshing portion with the square screw 29a.

The casting machine having the above configuration operates as follows.

In the state of taking out the product shown in FIG. 1, the mold clamping cylinder 25 and the core drive motor are driven,
This upper surface is covered with the -E mold 9b, and the core pin 21 is inserted into the cavity lO, and each core sliding member 32 is moved via the drive ring 29 to move the Qin core 39. ..., 39 is inserted into the cavity 10. Then, by driving the movable guide plate sliding cylinder 8, the movable die plate 7 is advanced with respect to the fixed die plate 6 to the pouring position shown in FIG. 6e and the opening 10a of the cavity 10 of the mold 9 of the movable die plate 7 are communicated.

Next, the press-fit cylinder 3 is driven to lower the plunger 3b within the sleeve 12, and the plunger 3b is passed through the gooseneck 13 from the nozzle injection opening 5a through the injection hole 6C of the fixed die plate 6 and the cavity opening 10a of the movable die plate 7. Molten metal 4 is press-fitted into cavity 10. Plunger 3b
is lowered to the lower end of the sleeve 12 and the cavity 10 is filled with molten metal 4. Immediately, the movable die plate 7 is moved relative to the fixed guide plate 6 by the driving of the movable die plate sliding cylinder 8, guided by the guide member 16.16. It is moved back to the ejecting position shown in FIG. 1, and the cavity opening 10m and the upper end surface of the eject pin 11 are aligned. At this time, the cavity opening 10a of the movable die plate 7 and the injection hole 6e of the fixed die plate 6 are aligned with the sliding surfaces 6b and 7b of the fixed die plate 6 and the movable die plate 7, respectively, which face each other.
It is closed to ensure hot water drains well and prevents water leaks. Simultaneously with this movement of the movable die plate 7, the press-fitting cylinder 3 is driven to raise the plunger 3b within the sleeve 12, filling the sleeve 12 with the molten metal 4 in preparation for the next press-fitting.

At the above-mentioned take-out position, the mold 9 is cooled and the cavity 1 is
The molten metal 4 in 0 is solidified and the ridge is completely solidified, or in some products, the molten metal solidifies while moving the movable die plate from the pouring position to the unloading position, so after arriving at the unloading position. Immediately, the mold clamping cylinder 25 and the core drive motor are driven to raise the -F mold 9, pull out the core pins 21, and move each core sliding member 32 via the drive ring 29 to remove the core. 39. ..., 39 is removed from the cavity 10, and then the product is pushed upward from the inserting piece body 9a using the eject pin Ili and pushed into the product transporting chuck 41 rotated above the inserting piece body 9a. Transport to the process. Then, a mold release agent is applied inside the cavity 10, the mold 9 is assembled again as described above, the core pins 21 and the cores 39° . . . , 39 are inserted into the cavity 10, and the above operations are repeated.

Note that the present invention is not limited to this embodiment, and can be implemented in various other ways. For example, instead of inserting the nozzle into the dovetail-shaped recess of the fixed gouly plate, the nozzle may be fitted into the fixed gouly plate so that the upper end surface of the nozzle and the sliding surface are flush with each other. Also, a motor or the like may be used instead of the cylinder for sliding the movable die plate, and 1. The mold clamping mechanism of the F mold may also be a cam type, a toggle type (not shown), or other means.

Furthermore, the drive means for rotating the drive ring 29 in the forward and reverse directions is not limited to a motor, but as shown in FIG. The piston rod 53a of the hydraulic cylinder 53 is connected to the protrusion 29d protruding outside of the plate 29C, and as the piston rod 53a moves, the drive ring 29'
It may also be made to rotate in forward and reverse directions. Note that 54 is a stopper groove provided in the play 129c, and a stopper pin 55 is abutted against the end face of the groove to restrict rotation of the drive ring 29'.

According to this embodiment, the core insertion/extraction device is driven with respect to the mold by a drive ring equipped with a spiral-shaped square screw, so the mold is replaced and the core insertion/extraction devices are fixed. It is possible to easily change the direction of the core or increase or decrease the number of core insertion locations without using bolts or clamps, that is, without providing a driving device for each core insertion location.

As described in detail in the above embodiments, the die casting casting machine according to the present invention includes a fixed die plate that is horizontally fixed on the L side of the melting furnace and has a sliding surface on the -E side, and a fixed die plate on the lower surface. a movable die plate formed with a sliding surface that comes into sliding contact with the sliding surface of the movable die plate, and a movable die plate sliding device that slides the movable die plate with respect to the fixed die plate between at least a pouring position and a dispensing position. Since the injection hole of the fixed die plate and the opening of the cavity of the mold held by the movable die plate are closed by sliding surfaces facing each other, the hot water drains extremely easily and prevents the formation of paris. figure,
Products with no runners or sprues can be easily cast, and the cooling efficiency of the mold is improved because the mold can be cooled by moving it away from the melting furnace.

In addition, the movable die plate that holds the mold is installed horizontally above the melting furnace via the fixed die plate, and a device for inserting and extracting the core is installed outside the mold, making the mold more compact. Even if you change the direction of core removal or the number of cores to be extracted, the mold can be easily and inexpensively replaced, and the installation of the core inserted into the mold or cavity can be easily removed and adjusted. This can be easily carried out, and since there is no restriction on the space for installing the mold due to a melting furnace or the like, it is possible to provide a mold in multiple directions. Also, since the nozzle is heated by the exhaust gas from the melting furnace, thermal efficiency can be improved.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional side views showing the state in which a product is taken out from the mold and the soft and hard pouring of molten metal into the mold, respectively, in a die-casting machine according to an embodiment of the present invention; 4 is a sectional view taken along line IV-TV in FIG. 5, FIG. 5 is an enlarged plan view of main parts, and FIG.
VT line sectional view, Figures 7 and 8 are the embodiment of Char, and Figure 9, respectively.
FIG. 10 shows another embodiment of the drive ring drive device. 1... Melting furnace, 4... Molten metal, 5... Nozzle, 5a
... Nozzle injection opening, 6 ... Fixed die plate, 6
e... Injection hole, 7... Movable die plate, 5 b
, 5c, 7b. 7C...Sliding surface, 8...Movable die plate sliding cylinder, 9...Mold, 10...Cavity, 10a
...Cavity opening, 11...Eject pin. Patent applicant Tokai Rika Denki Seisakusho Co., Ltd. Patent attorney Hajime Aoyama and two others Figure 6 Figure 7 Figure 9 Figure 1o

Claims (1)

[Scope of Claims] (1) The molten metal in the bullion melting furnace is press-fitted into the cavity of the metal sluice through a runner through a runner through a nozzle attached to the tip of the runner, and after the presser is pressed, L is deposited. In a die-casting machine in which the mold is cooled and the product is taken out by a product take-out device, the mold is fixed horizontally on the L side of the melting furnace marked L, and penetrates in the folding direction so as to be able to communicate with the injection opening of the nozzle marked F. A fixed die plate having a fixed injection hole and a sliding surface formed on the upper surface, and a sliding surface that is in sliding contact with the sliding surface of the fixed die plate and is unified with the lower surface of the mold. A movable die plate formed on the lower surface and movable in one direction on the sliding surface E of the fixed die plate L, a mold placed on the movable die plate, and a device for inserting/extracting the core and the movable die plate. Die plate-
(h) With respect to the fixed die plate, there is a sliding plate that at least aligns the injection hole of the fixed die plate with the opening of the cavity of the mold, and a sliding position that makes the injection hole of the fixed die plate and the opening of the cavity of the mold face each other. A casting machine for die casting, characterized in that it is equipped with a movable die grate sliding device that closes on a moving surface and slides and displaces the product to a take-out position from which the product is taken out by the product take-out device.