JPH09192812A - Horizontal clamping and vertical injecting die casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the contamination and the damage of an injection plunger device and attached working device caused by flash, releasing agent, cooling water, etc., dropped from a die in a horizontal clamping and vertical injecting die casting machine for casting by injecting molten metal into the vertical direction from the parting surface of the die clamping in the horizontal direction. SOLUTION: In this die casting machine, the injection plunger device 10 for injecting the molten metal in an injection sleeve 7 fitted to the parting surface of a fixed die 5 and a movable die 6 into a die cavity C is provided with the injection plunger 11 arranging the upper end part thereof in the injection sleeve 7, a flat beam-like cross frame 12 arranged at the lower part of the injection plunger and connecting the center part with the lower end of the injection plunger 11 and a pair of injection cylinders 13 supported on a pair of projected supporting parts 2a projected to the front part from both side lower end parts of a fixed die plate 2 in a die clamping device 1 and arranged downward and connecting the tip part of each of the cylinder rods 13a with each of both end parts of the cross frame 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting machine used for casting light alloys and the like, and more specifically, casting a molten metal in a vertical direction from a divided surface of a mold clamped in the horizontal direction. The present invention relates to a horizontal mold clamping / vertical injection die casting machine having a configuration.

[0002]

2. Description of the Related Art As is well known, in a die casting method in which a precision mold is closed with a high force and a molten metal is pressed into the mold cavity with a high pressure, a cast product having a complicated shape can be mass-produced with high dimensional accuracy. Widely applied to the production of alloys and resin members. Also, although various devices are used,
These die casting machines are categorized according to the mold clamping direction and the molten metal injection direction.General vertical die casting machines clamp the mold vertically with a vertical mold clamping device, and It is configured to inject the molten metal in the vertical direction by an injection device equipped with an injection sleeve that communicates with the cavity in the vertical direction and cast it.In addition, a general horizontal die casting machine uses a horizontal mold clamping device to move the mold in the horizontal direction. The mold is clamped, and the melt is laterally injected by an injection device equipped with an injection sleeve that communicates with the mold cavity in the horizontal direction for casting.

In the vertical die casting machine, since the length of the injection sleeve is short, the temperature drop of the molten metal is small,
In addition, it is often used for casting high-strength parts because it suppresses the formation of cavities due to gas entrainment in the injection sleeve and effectively transmits the injection pressure. on the other hand,
The horizontal die casting machine has a lower machine height than the vertical die casting machine, and the horizontal die clamping device has the advantages of good operability and high versatility, but with horizontal injection, the molten metal in the injection sleeve is used. There is a problem that the filling rate is low, the surface area of the molten metal is large, and oxidation and solidified pieces are generated, which tends to deteriorate the product quality.

Therefore, in order to enjoy the advantages of each of the vertical type and the horizontal type, various die casting machines have been proposed in which the mold is clamped in the horizontal direction and the molten metal is injected in the vertical direction. For example, as shown in FIG. 4, a horizontal die clamping / vertical injection die casting machine disclosed in Japanese Patent Publication No. 59-13941 is
A mold clamping mechanism (21) that moves one of the pair of molds (22), (22 ') to open the mold in the lateral direction, and an injection cylinder that injects molten metal into the cavity (C) of this mold. It is provided with an injection plunger device (24) provided with (24a) at the upper part. In addition, the injection plunger device (24) is installed in the pit (P) where the installation floor is dug down.
It is arranged so that it can be rotated and raised, while a pair of molds (22),
A vertical sprue (23) is provided on the divided surface of (22 '). In this horizontal mold clamping / vertical injection die casting machine, after each injection cycle, the injection plunger device (24) is tilted to pour the molten metal into the upper injection cylinder (24a), and then it is vertically rotated and returned as well as raised. Then, the tip of the injection cylinder (24a) is pressed against the sprue (23), and the molten metal is placed above the mold cavity.
It is configured to inject into (C).

Further, the horizontal die clamping / vertical injection die casting machine disclosed in Japanese Patent Publication No. 7-41391 has a diagram (a) in FIG. 5 (a longitudinal sectional view along a die dividing surface) and a diagram (b). As shown in (A-A cross-sectional view of Fig. (A)), a mold clamping mechanism (31) for laterally clamping the moving mold (33) with respect to the fixed mold (32).
A fixed mold (32) and a movable mold (33) to be clamped, the split mold injection sleeve (34) attached to the dividing surfaces, and the fixed mold.
(32) and the injection sleeve between the dividing surfaces via the connecting member (36) engaged with the groove (35) formed in the dividing surface of the movable die (33)
(34) An injection plunger device (37) suspended immediately below is provided. In addition, the hot water supply port provided on the side surface of the injection sleeve (34)
(34a) is connected to a hot water supply device (not shown) via a mouthpiece (not shown) and a hot water supply pipe. This horizontal mold clamping
The vertical injection die casting machine is configured such that the molten metal is directly supplied to the injection sleeve (34) from a hot water supply device (not shown), and the molten metal is injected into the upper mold cavity (C).

[0006]

However, in the above-mentioned conventional horizontal die clamping / vertical injection die casting machine, the height of the floor on which it is installed is low, and the injection sleeve is vertical, so that the filling rate of the molten metal is increased. Although there is little decrease in temperature, the entrainment of gas is suppressed, and the injection pressure is effectively transmitted, there are the following problems, respectively.

That is, in the former die-casting machine (Japanese Examined Patent Publication No. 59-13941), the injection plunger device is configured to rotate and rise, and its height becomes high, so that its structure becomes complicated and , A deep and large pit is required at the installation location. Furthermore, since the injection plunger device is tilted, pivoted back and raised from the time of receiving the hot water to the injection sleeve, the time between them is prolonged, and a solidified layer is formed in the injection sleeve, which causes casting. It is easy to deteriorate the quality of the product. In the latter die-casting machine (Japanese Patent Publication No. 7-41391), the injection force of the molten metal is applied to the fixed / moving mold and the injection plunger device, and the injection force is applied to the mold clamping mechanism to open the mold. Although it is possible to prevent the trouble of, and the pit can be made smaller than the former case where the injection plunger device is independently arranged, the injection plunger device is suspended by engaging with the mold, Since it is necessary to process the mold to mold the engaging part, the cost of the mold is high, and the injection plunger device and the mold are disengaged each time the mold is replaced. At this time, it is necessary to separately prepare a supporting / moving means for the injection plunger device.

In any case, it is difficult to further reduce the total machine height and the pit depth with the structure in which the vertical injection plunger device is arranged below the mold. Furthermore, since the injection plunger device is located directly below the dividing surface of the mold, the mold releasing agent and cooling are applied when the mold releasing agent is applied to the mold and the cooling water is sprayed at each injection cycle. Water and burrs of cast metal remaining on the surface of the mold drop, contaminating and damaging the operating part of the injection plunger device and the control system equipment such as the attached stroke sensor, which often causes failures. There is a problem to say.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an injection plunger device and an accompanying stroke sensor caused by a drop of burrs remaining on the surface of a mold, a release agent to be applied and cooling water. It is an object of the present invention to provide a horizontal die clamping / longitudinal injection die casting machine capable of reliably avoiding contamination / damage of working equipment such as, and thus capable of continuously continuing continuous casting.

[0010]

In order to achieve the above object, the present invention has the following arrangement. That is, the horizontal die clamping / vertical injection die casting machine according to the present invention is a die for laterally clamping the die by moving the movable die plate having the movable die attached to the fixed die plate having the fixed die attached. A clamping device, an injection sleeve mounted between the divided surfaces of a fixed mold and a movable mold that are clamped in the lateral direction, a hot water supply device for supplying molten metal into the injection sleeve, and hot water supplied into the injection sleeve. In a horizontal die clamping / vertical injection die casting machine, which comprises an injection plunger device for injecting a molten metal into an upper mold cavity, and vertically injects the molten metal from a divided surface of a mold clamped in a horizontal direction to cast the molten metal, The injection plunger device is formed in the form of a flat beam having a length larger than the widths of the fixed and movable molds, and an injection plunger that is arranged so as to be slidable with its upper part positioned in the injection sleeve. A cross frame horizontally arranged below the injection sleeve and having a central part connected to the lower end of the injection plunger, and a front located on both sides of the front end of the fixed die from both lower ends of the fixed die plate. At least one injection cylinder that is supported on a pair of overhanging support portions that are provided so as to project toward each other, is arranged in a downward vertical direction, and has the tip end of the cylinder rod connected to both ends of the cross frame. It is characterized by comprising.

Further, the main body portion is connected to the outer side portion of one of the pair of overhanging support portions, and
A rod-type stroke sensor may be provided in which a tip end portion of a measuring rod directed vertically downward is connected to a side end portion of the cross frame.

In the horizontal die-clamping / vertical injection die casting machine of the present invention, the injection plunger device has an injection plunger arranged in the injection sleeve through a flat beam-shaped cross frame arranged below the injection plunger, and a fixed mold front end. Since it is configured to pull up the molten metal in the injection sleeve into the upper mold cavity by the injection cylinder arranged on the side of the part, that is, the injection cylinder that drives the injection plunger is Since it is located not on the side of the mold but on the side like the conventional device, the mold release agent, cooling water, burrs, etc. that fall from the dividing surface of the mold in the vertical direction are injected. It is possible to prevent the injection cylinder of the plunger device and the attached control system device from reaching and contaminating the working part of the device. Further, since it is not necessary to dispose the injection cylinder below the mold, the height of the entire machine and the pit depth at the installation portion can be greatly reduced as compared with the conventional apparatus.

Further, by disposing a stroke sensor on the outer side of the overhanging support portion and measuring the injection stroke,
Surely avoid contamination and damage of the stroke sensor due to mold release agent, cooling, burr, etc. falling from the mold, maintain high measurement accuracy of each injection stroke, and stabilize the molten metal injection amount in each casting cycle. You can

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a drawing showing a schematic configuration of one embodiment of a horizontal die clamping / vertical injection die casting machine of the present invention, in which (a) is a top view and (b) is (a) A- A sectional view, (c) figure is a BB vertical sectional view of (a) figure.

In FIG. 1, (1) is a mold clamping device, and this mold clamping device (1) comprises a fixed die plate (2) to which a fixed mold (5) is attached, and a movable mold ( (6) is attached to the moving die plate (3), and
(c) As shown in the figure, the moving die plate (3) is guided by the tie bar (4), and is pressed and moved in the direction of the fixed die plate (2) by a hydraulic cylinder (not shown here) to move the mold. Is clamped in the lateral direction.
Also, as shown in Figures (a) and (b), attach the fixed die plate (2) to the front, which is located on both sides of the front end of the fixed mold (3), from its lower ends. A pair of projecting support portions (2a) are provided.

(7) is an injection sleeve, and this injection sleeve (7) is divided into two parts along a plane passing through the central axis.
As shown in (b) and (c), the upper end of each is engaged with the dividing surface of the fixed mold (5) and the moving mold (6),
The upper opening communicates with the mold cavity (C), and the lower end projects vertically downward. A hot water inlet (7a) is provided on the lower side wall of the injection sleeve (7) on the side of the fixed mold (5), and the hot water inlet (7a) is provided with an inclined rising portion (8a) at the front. It is connected to the hot water supply device (9) via the hot water supply pipe (8).

(10) is an injection plunger device, and this injection plunger device (10) has an injection tip attached to the upper end.
Positioning (11a) in the injection sleeve (7), the injection plunger (11) is arranged slidably, and the width between the both ends of the pair of overhanging supports (2a) of the fixed die plate (2). It is formed into a flat beam of approximately equal length, and as shown in (b), the injection sleeve
A cross frame (12), which is arranged horizontally below (7) and whose central part is connected to the lower end of the injection plunger (11).
And are supported vertically on a pair of overhanging support parts (2a) of the fixed die plate (2) and arranged vertically downward, and the tip end of each cylinder rod (13a) is attached to the cross frame (1
2) A pair of injection cylinders (13) connected to both ends.

Reference numeral (14) is a stroke sensor, and this stroke sensor (14) is a rod type for measuring magnetostriction of the linear movement amount of the measuring rod (14a), and as shown in FIG.
The main body is supported by one overhanging support (2a) of the fixed die plate (2) located outside the injection cylinder (13), and the tip of the measuring rod (14a) facing vertically downward is fixed. It is connected to the side end of the cross frame (12) and its measuring rod (1
The stroke of the injection cylinder (13) depends on the linear movement of 4a),
That is, the injection stroke of the injection plunger (11) is detected.

In the die casting machine of this embodiment having the above construction, first, as shown in FIG. 1 (c), the movable die plate (3) is pressed and moved to fix the movable die (6). Mold
It is pressed against (5) with high force and the mold is clamped, so that the injection sleeve (7) divided into two parts is also integrated. At this time, the injection plunger (11) of the injection plunger device (10) has the injection tip (11a) at the upper end and the hot water supply port (7a) of the injection sleeve (7) at the upper end surface.
It is located at a reference position that is substantially the same height as the lower end.
Next, as shown in (a) of FIG. 2 which is an operation explanatory view, the molten metal (M) is fed from the hot water supply device (9) to the injection sleeve (7).
Hot water, and then the pair of injection cylinders (13) of the injection plunger device (10) are operated synchronously, and the injection plunger is inserted through the lower cross frame (12) as shown in Fig. (B).
(11) is pulled up, and the molten metal (M) in the injection sleeve (7) is injected into the upper mold cavity (C) by the injection tip (11a) at the tip thereof and cast. The injection stroke of the injection plunger (11) at this time is
It is detected and controlled by a stroke sensor (14) arranged outside of 3). And the molten metal in the mold cavity (C)
When (M) solidifies, the injection plunger (11) is lowered and the moving mold (6) is opened to take out the cast product. Then, as shown in (c), the injection nozzle descends from above.
(N) allows mold cavity (C) and injection sleeve (7)
A mold release agent is sprayed and applied to the inner surface of, and cooling water is sprayed if necessary, and then the process proceeds to the next injection cycle.

As described above, in the die casting machine of the present embodiment, the injection plunger device pulls up the injection plungers with a pair of injection cylinders arranged on both sides of the mold, thereby allowing the molten metal in the injection sleeve to move upward. Since it is configured to inject into the mold cavity, that is, the injection cylinder that drives the injection plunger is located not on the side of the mold as in the conventional device but on both sides, so it is vertical. The mold release agent, cooling water, burrs, etc. that fall from the split surface of the mold fall downward through the cross frame that is the transmission part of the ejection force, and the injection cylinders arranged on both sides of the mold and the attached stroke sensor. It is possible to prevent the operating part from directly reaching the control system equipment such as to be contaminated and damaged, so that continuous casting can be stably continued. Also,
Since the injection cylinder is not arranged below the mold, the overall height can be greatly reduced as compared with the conventional apparatus, and the pit depth at the installation portion can be significantly reduced, or the pit itself can be eliminated.

In the above embodiment, the injection plunger device has a pair of injection cylinders arranged on both sides, but this maintains the horizontal state of the cross frame and smoothly pulls up the injection plunger. In order to do so, the injection cylinder is arranged on the side of the mold, and the injection plunger is pulled up via the cross frame arranged below. One or two or more cylinders may be arranged. For example,
As shown in (a) of FIG. 3 which is an explanatory view of another embodiment of the present invention, the injection cylinder (13) is arranged only on one of the overhanging support portions (2a), while the other is arranged. A guide bar (15) is attached vertically upward to the end of the cross frame (12) on the side of the overhang support (2a), and the guide bar (15) is attached to the other overhang support of the other side.
By using an injection plunger device (10 ') configured to slidably penetrate through (2a) via a guide sleeve (16), as shown in (b), a pair of overhanging support devices can be supported. Injection plunger device (10 ") configured such that a similar guide bar (15) is slidably passed through each of the parts (2a) via a guide sleeve (16).
Therefore, the horizontal state of the cross frame (12) is maintained by the guide bars (15), and one injection cylinder (1
The injection plunger (11) can be smoothly pulled up and injected by the method (3).

Further, in the above embodiment, the injection sleeve attached to the split surface of the fixed mold and the movable mold is divided into two parts on the same surface as the split surface, but this injection sleeve is fixed mold. It may be an integral type that is engaged and fixed to the side.

[0023]

As described above, in the horizontal die clamping / longitudinal injection die casting machine according to the present invention, the injection plunger device and the auxiliary equipment due to the burrs remaining on the die surface, the mold release agent to be applied, and the cooling water falling. It is possible to reliably avoid contamination and damage of the working equipment such as the stroke sensor, so that continuous casting can be stably continued.

[Brief description of the drawings]

FIG. 1 is a horizontal die clamping / vertical injection die casting machine 1 according to the present invention.
It is drawing which shows the schematic structure of an Example, Comprising: (a) figure is a top view, (b) figure is AA sectional drawing of (a) figure, (c) figure is BB vertical section of (a) figure. It is a side view.

FIG. 2 is an operation explanatory view of a horizontal die clamping / longitudinal injection die casting machine according to an embodiment of the present invention.

FIG. 3 is an explanatory view of another embodiment of the horizontal die clamping / vertical injection die casting machine of the present invention.

FIG. 4 is a drawing showing a schematic configuration of a conventional horizontal die clamping / vertical injection die casting machine.

FIG. 5 is a view showing a schematic configuration of another conventional horizontal die clamping / vertical injection die casting machine.

[Explanation of symbols]

(1) --Clamping device, (2) --Fixed die plate, (2a) --Overhang support, (3) --Moveable die plate, (4) --Tie bar,
(5) --Fixed mold, (6) --Movable mold, (7) --Injection sleeve, (7a) --Hot water inlet, (8) --Hot water pipe, (8a) --Inclined rising part , (9) --Water heater, (10), (10 '), (10 ")-Injection plunger device, (11)-Injection plunger, (11a) --Injection tip,
(12)-Cross frame, (13)-Injection cylinder, (13a)-
Cylinder rod, (14)-Stroke sensor, (14a)-Measuring rod, (15)-Guide bar, (16)-Guide sleeve,
(C) --Mold cavity, (N) --Injection nozzle, (M) --Molten.

Claims (2)

[Claims] 1. A mold clamping device for laterally clamping a mold by moving a movable die plate with a movable mold attached to a fixed die plate with a fixed mold attached, and a mold clamping device for laterally clamping the mold. An injection sleeve attached between the split surfaces of the fixed mold and the moving mold, a hot water supply device for supplying the molten metal into the injection sleeve, and the molten metal supplied into the injection sleeve is injected into the upper mold cavity. In a horizontal die clamping / vertical injection die casting machine in which a molten metal is vertically injected from a divided surface of a mold clamped in the horizontal direction to cast, the injection plunger device has an upper portion with the injection sleeve. An injection plunger that is positioned inside and is freely slidable, and a flat beam that has a length larger than the width of the fixed and movable molds and that is horizontally arranged below the injection sleeve. A cross frame whose central part is connected to the lower end of the injection plunger, and a pair of tensions which are provided from the lower end parts on both sides of the fixed die plate to the front located on both sides of the front end part of the fixed mold. A horizontal mold clamping, comprising: at least one injection cylinder supported on the projecting support part, arranged vertically downward, and having a tip end of a cylinder rod connected to both ends of the cross frame.・ Vertical injection die casting machine. 2. A body part is connected to an outer side portion of either one of the pair of overhanging support portions, and a tip end of a measuring rod directed vertically downward is provided on a side of the cross frame. The horizontal die clamping / vertical injection die casting machine according to claim 1, wherein a rod type stroke sensor connected to an end portion is provided.