JPH0929410A - Vertical casting type die casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect an injection cylinder rod and a cylinder rod packing from a casting flash from a die parting surface of a vertical casting type die casting machine, dropping of molten metal and slag from an injection sleeve or dripping of die spray liquid and sleeve spray liquid. SOLUTION: An injection mechanism 50 mounts a docking cylinder 30 for ascending/descending the injection sleeve 60 for casting molten metal into a cavity 11a and an injection cylinder 70 for ascending/descending a plunger 62 on a travelling truck 52 for travelling on travelling rails 2B extended to the longitudinal direction at each two pieces in the symmetrical state at the right and the left sides. The injection cylinder 70 is arranged at apart position from the die 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a movable mold and a fixed mold which are opened in a horizontal or vertical direction, and is cast downward into a cavity formed by the two molds clamped. The present invention relates to a vertical casting die casting machine that casts molten metal from a mouth, and particularly to a vertical casting die casting machine that pays attention to protection of a rod and packing of an injection cylinder.

[0002]

2. Description of the Related Art Vertical casting die casting machines are further classified into a vertical clamping die and a horizontal clamping die according to the die clamping direction, but both are tiltable or horizontally movable. An injection sleeve is provided directly below the mold. When casting a molded product, after the mold is clamped, the injection sleeve is tilted or horizontally moved to supply the molten metal into the injection sleeve, and after returning the injection sleeve to its original state, the inside of the injection sleeve The molten metal of (3) is driven by the injection cylinder to raise the plunger in the injection sleeve to be injected and filled into the cavity of the mold. 4 and 5 show a conventional structure of an injection mechanism which the applicant of the present invention has already disclosed in Japanese Patent Publication No. 2-20350, and FIG. 4 shows a schematic overall side view of a horizontal vertical vertical die casting machine. FIG. 5 shows a front view taken along the line BB of FIG. As can be seen from FIG. 4 and FIG. 5, the injection cylinder of the horizontal vertical vertical casting die casting machine is generally housed in the pit 1, and a pair of left and right vertically long hanging from the machine base 2 side into the pit 1 is installed. It is mounted on a support frame 13 composed of a plate-shaped member 13a, a disk member 13b connected to the plate-shaped member 13a, and a horizontal member 13d connecting the lower ends thereof. In the conventional injection mechanism of the horizontal vertical vertical die casting machine, the cavity is filled with the molten metal in the injection sleeve 25 by moving the plunger 20 back and forth in the vertical direction. Is performed by driving the injection cylinder 15, and since the injection sleeve 25 and the piston rod of the injection cylinder 15 are concentrically connected, the plunger 20 and the injection cylinder 15 are inevitably
It was linearly arranged vertically below the casting port. Also,
Similarly to the above-mentioned horizontal vertical vertical casting die casting machine, the vertical vertical vertical casting die casting machine also injects and fills the molten metal into the cavity from the position right below the mold by the injection sleeve and the plunger.

[0003]

However, in such a conventional injection mechanism, when the mold flash is attached to the dividing surface of the mold when the mold is opened, or when the plunger is retracted. A part of the molten metal adhering to the inner wall of the injection sleeve is peeled off by the plunger and falls downward as it is. The injection flash and molten slag that have fallen are deposited on the cylinder rod packing retainer because the injection cylinder is directly below the casting port, damaging the cylinder rod and entering the packing inside the cylinder rod packing retainer. Hurt. Also,
When the cylinder rod or the packing is damaged in this way, oil leakage of the injection cylinder is induced, the life of the cylinder rod or the packing is shortened, and the replacement time is shortened, thereby increasing the maintenance cost. Furthermore, the spray liquid sprayed onto the cavity surface of the mold wets the injection cylinder directly below the mold, and in particular, the spray liquid applied to the cylinder rod and cylinder rod packing retainer passes through the dust seal and packing and is injected. Mix in the cylinder. The mold spray liquid and sleeve spray liquid used in the horizontal vertical vertical casting die casting machine contain inorganic materials such as talc to secure the heat retention of the molten metal as the main component, and together with hydraulic oil, Circulating the hydraulic circuit, it blocks the spool of various valves operated by hydraulic pressure and the pilot line of small diameter, which causes malfunction of the machine.

[0004]

In order to solve such a problem, in the present invention, in the first invention, the fixed mold and the movable mold are arranged in a horizontal direction or a vertical direction via a mold clamping device. An injection mechanism is provided in which the mold is opened, and the molten metal is injected into the cavity formed by the two molds, and the injection sleeve for pouring the molten metal is brought into contact with the injection sleeve for pouring the molten metal from the lower side to the upper side. A vertical casting die casting machine, wherein the injection mechanism is a movable traveling cart that travels on a pair of left and right rails installed directly below the mold dividing surface toward the pouring position on the back side of the fixed plate. And a pair of left and right injection cylinders that are connected to the plunger and that move forward and backward. did. According to a second aspect of the invention, the injection mechanism of the first aspect of the invention is such that a pair of left and right injection cylinders are fixedly erected on a traveling carriage, and the tip ends of the tops of the injection piston rods projecting above the both injection cylinders. A connecting plate having both ends fixedly attached is provided, a lower end of a plunger having a large-diameter step portion is connected to the central upper surface of the connecting plate, and a pair of left and right docking cylinders penetrating the connecting plate are provided. A small-diameter stepped portion having a tapered tip end is provided in the middle of the piston rod of the docking cylinder, and the lower end of the injection sleeve is fixedly erected at the center of the top end of the piston rod. An intermediate horizontal connecting the ends of the top horizontal top plate and penetrating the upper part of the small diameter stepped part of the piston rod at both ends and the lower part of the large diameter stepped part of the plunger at the central part And an injection mechanism which is arranged to.

[0005]

The present invention is configured as described above, and since the injection cylinder is arranged not at the position directly below the mold but at a position separated from the mold, the flash of flash adhered to the mold can be prevented. The injection cylinder is not contaminated by the dripping of the spray liquid. Therefore, it is possible to avoid the damage to the packing or the like and the malfunction of the machine, which have occurred conventionally. In addition, the injection mechanism such as the injection sleeve and the injection cylinder is mounted on the traveling carriage to move on the traveling rail to the rear surface of the fixed plate to pour the molten metal. Not only is pouring easy, There is an advantage that consumables can be easily replaced.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 relate to the present invention, FIG. 1 is an overall side view of a horizontal clamped vertical casting die casting machine, FIG. 2 is a front view of a horizontal clamped vertical casting die casting machine, and FIG. 3 is A- in FIG. It is a cross-sectional plan view of A view.

As shown in FIGS. 1 and 2, a horizontal vertical vertical casting die casting machine (hereinafter abbreviated as a machine) 1 according to the present invention.
00 is a substantially square fixed platen (fixed platen) 3 at both ends of the machine base 2A fixed on the floor surface.
And a link housing 4 are vertically fixed, and a movable platen (movable platen) 7 which moves in the horizontal direction while being guided by tie rods 5 which penetrate the four corners of both platens and are fastened with nuts 6 is provided in the middle. It is arranged. The movable platen 7 is moved back and forth by a piston rod 9 of the mold clamping cylinder 8 via a toggle mechanism 10 so that the fixed mold 11 of the fixed plate 3 and the movable mold 12 of the movable plate 7 are brought into contact with each other and closed. And the mold opening operation is performed.

Next, the injection mechanism 50 will be described. As shown in FIGS. 2 and 3, the injection mechanism 50 in this embodiment mainly includes a traveling carriage 52 that moves on the traveling rail 2B, an injection sleeve 60 mounted on the traveling carriage 52, and two injection cylinders 70. It is composed of two docking cylinders 90 and the like. That is, as shown in the figure, the fixed mold 1
Two traveling rails are symmetrically extended to the rear surface of the stationary platen 3 on the lower floor surface of the dividing surface of the movable die 12 and the movable die 12 when the die is closed, and the piston rod 98a of the moving cylinder 98 is above this.
The injection cylinder 70 and the docking cylinder 90 are erected vertically and symmetrically on the upper surface of the traveling carriage 52, which is movable by the forward and backward movements. The injection piston rod 72 of the injection cylinder 70 is provided with a horizontal connecting plate 74 at the ends thereof, and the lower end of the plunger 62 slidably fitted inside the injection sleeve 60 is fixedly attached to the central upper surface of the connecting plate 74. To be done.

On the other hand, the piston rod 90a of the docking cylinder 90 penetrates the connecting plate 74, and the tips thereof are fastened to the ends of the horizontal top horizontal plate. In addition, a tapered stepped portion 90b having a small upper portion is provided in the middle of the piston rod 90a, and the tapered stepped portion 90b is provided.
An intermediate plate 92 having a through hole that penetrates the small-diameter piston rod 90a above and at the same time penetrates the lower part of the large-diameter stepped portion 62b of the plunger 62 is provided. Therefore, the injection mechanism 50 is mounted on the traveling carriage 52 and moves forward from directly below the mold to the back of the stationary platen 3, receives hot water in the injection sleeve 60, and then returns to the position directly below the mold. The injection sleeve 60 is brought into close contact with the casting opening 11b in the lower part of the mold, and then injection-filled into the cavity 11a. As a moving means of the traveling carriage 52, a horizontally arranged hydraulic cylinder (moving cylinder 98 in the embodiment of the present invention) is used, or a wheel that runs on the traveling rail 2B is provided and this is used as an electric motor with a brake. It may be rotationally driven by the driving means. The lower ends of the fixed platen 3 and the movable platen 7 are firmly bottle-fed with the upper end face of the machine base 2A and the pressing metal fitting 2C as shown in FIG.

The operation of the horizontal vertical vertical die casting machine 100 having the injection mechanism 50 constructed as above will be described. First, after confirming the mold clamping operation and the take-out operation that are normally performed, the test molding operation is performed. In this test molding operation, a trial casting called "disposal casting" is usually performed several times, and the conditions are set by grasping appropriate values of the casting amount, casting pressure and mold clamping pressure according to the characteristics of the molten metal. After setting the conditions in the test molding operation, the production molding operation is performed.
Specifically, by operating the moving cylinder 98 to the right position in FIG. 3, the traveling carriage 52 equipped with the injection mechanism 50 including the injection sleeve 60 and below is moved to the pouring position behind the stationary platen 3 to supply hot water (not shown). Molten metal with a specified amount of hot water is poured into the injection sleeve 60 by the device. Next, after returning the traveling carriage 52 to the original position, the docking cylinder 90 is operated to raise the injection sleeve 60, and casting is performed below the split surfaces of the two molds 11 and 12 in which the upper end of the injection sleeve 60 is clamped. Mouth 1
Abut and closely contact 1b. At this time, the tapered stepped portion 9 of the piston rod 90a of the docking cylinder 90 that rises
0b raises the intermediate plate 92 at the same speed, while the intermediate plate 9
2 also raises the plunger 62 at the same speed through the large-diameter stepped portion 62b, so that the molten metal in the injection sleeve rises without spilling while maintaining the same liquid level level as when pouring. After that, the injection cylinder 70 is operated and the injection piston rod 72 is moved up to raise the injection sleeve 6
The plunger 62 is raised while 0 is kept stationary, and the molten metal in the injection sleeve 60 is injected and filled in the cavity 11a by raising the plunger tip 62a. Then, after a certain cooling time required for the molten metal to solidify, the mold is opened and the product is taken out by the product take-out device. In this way, after one shot is completed, the next cycle is started based on a similar operation procedure. In the present invention, disposing the injection cylinder 70 just below the mold dividing surface as in the conventional structure is stopped, and the injection cylinder 70 is arranged at a position eccentric by an appropriate distance from just below the mold dividing surface. Dropping objects such as spray liquid and drop liquid from the mold dividing surface are injected into the injection cylinder 7.
It is possible to avoid multiplying by zero. Further, since all the devices of the injection mechanism 50 are mounted on the traveling carriage 52 and can be moved to the back surface of the fixed plate at the pouring position, the worker can easily access the injection cylinder 70 for inspection and maintenance. The maintainability is superior to that of the conventional structure in which the injection cylinder is located just below the mold dividing surface. Further, it is easy to replace consumable items such as the injection sleeve 60 and the plunger tip 62a. In addition, in the embodiment of FIG. 1 to FIG. 3, the embodiment of the horizontal type vertical casting die casting machine has been described, but the present invention is also applicable to the vertical type vertical casting die casting machine in which the casting opening is directly below the die. It goes without saying that can be implemented.

[0011]

As described above, in the present invention,
The following excellent effects can be achieved. (1) Since the injection cylinder is not directly under the mold dividing surface, the casting flash falling from the mold dividing surface, the molten slag falling from the injection sleeve, or the molten metal due to backflush drops onto the injection cylinder rod or cylinder rod packing retainer. do not do. Therefore, there is almost no danger of damaging the cylinder rod or packing, and a long service life is secured. (2) The dropping of the mold spray liquid or the sleeve spray liquid can be similarly avoided, so that the malfunction of the machine due to mixing with the hydraulic oil of the hydraulic system can be avoided. Therefore, driving operability and maintainability are improved. (3) Compared with the conventional structure, inspection of the injection cylinder and replacement of consumable parts such as the injection sleeve and the plunger tip become easier.

[Brief description of drawings]

FIG. 1 is an overall side view of a horizontal type vertical vertical casting die casting machine according to an embodiment of the present invention.

FIG. 2 is a front view of a horizontal vertical vertical die casting machine according to an embodiment of the present invention.

3 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 4 is an overall side view of a conventional horizontal vertical vertical casting die casting machine.

5 is a front view taken along the line BB of FIG.

[Explanation of symbols]

1 Pit 2 Machine Base 2A Machine Base 2B Traveling Rail 2C Holding Bracket 3 Fixed Plate (Fixed Platen) 4 Link Housing 5 Tie Rod 6 Nut 7 Movable Plate (Movable Platen) 8 Clamp Cylinder 9 Piston Rod 10 Toggle Mechanism 11 Fixed Mold 11a Cavity 11b Casting port 12 Movable mold 13 Support frame 13a Plate member 13b Disc member 13d Horizontal member 15 Injection cylinder 20 Plunger 25 Injection sleeve 30 Hydraulic piping 33 Lower block 50 Injection mechanism 52 Traveling trolley 60 Injection sleeve 62 Plunger 62a Plunger chip 62b Large diameter stepped portion 70 Injection cylinder 72 Injection piston rod 74 Connection plate 90 Docking cylinder 90a Piston rod 90b Tapered stepped portion 92 Intermediate plate 94 Top horizontal top plate 98 Transfer Cylinder 98a a piston rod 100 vertical casting mold casting machine (horizontal Shimetate casting mold die casting machine)

Claims (2)

[Claims] 1. A fixed mold and a movable mold are opened in a horizontal direction or a vertical direction through a mold clamping device, and a molten metal is introduced into a cavity formed by the two molds. A vertical casting die casting machine having an injection mechanism for abutting an injection sleeve containing molten metal and casting the molten metal from below to above, the injection mechanism comprising: A vertically movable injection sleeve mounted on a movable traveling carriage that travels on a pair of right and left rails laid toward the pouring position on the back side, and a plunger that is fitted in the injection sleeve and is movable back and forth in the axial direction. And a pair of left and right injection cylinders connected to the plunger and moved back and forth for moving the plunger, a vertical casting die casting machine. 2. A pair of left and right injection cylinders are fixedly erected on the traveling carriage, and a connecting plate is fixed to both ends of the top end of the injection piston rod projecting above the injection cylinders. , A lower end of a plunger having a large-diameter stepped portion on the middle upper surface of the connecting plate is connected, and a pair of left and right docking cylinders penetrating the connecting plate are fixedly erected on the traveling carriage, In the middle of the piston rod of the cylinder, a small-diameter stepped portion each having a tapered front end side is provided, and the top end of the piston rod is connected to the end of a top horizontal top plate that fixes the lower end of the injection sleeve at the center. The injection mechanism is further provided with an intermediate water top plate which penetrates an upper portion of a small diameter stepped portion of the piston rod at both ends and a lower portion of a large diameter stepped portion of the plunger at a central portion. Description Vertical die casting machine.