JPS5941831B2 - Pressure casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure casting apparatus used for performing high-pressure solidification casting methods and the like.

In general, this type of device includes a fixed mold, a movable mold that is attached to the fixed mold so as to be able to move toward and away from the fixed mold, and an operation that is provided between the movable mold and the fixed mold to move the movable mold forward and backward with respect to the fixed mold. The movable mold is configured to form a cavity between opposing surfaces of the fixed mold when the movable mold comes into contact with the fixed mold.

Conventionally, a hydraulic cylinder mechanism has been used as the operating mechanism, and since it is also used to tighten the movable fixed type, a large hydraulic cylinder mechanism that can generate high pressure is required. There are problems such as an increase in the scale of the fruiting device, an increase in manufacturing costs, and an increase in the space it occupies. The present invention was proposed in view of the above,
A mold clamping mechanism different from the operating mechanism is specially provided on the fixed mold to solve the above problem, and the special provision of the mold clamping mechanism does not interfere with the operation of the operating mechanism. The purpose of the present invention is to provide a pressure casting device, and its features include a fixed mold, a movable mold that is attached to the fixed mold so as to be able to come into contact with and be separated from the fixed mold, and a mold that is provided between the movable mold and the fixed mold. In a pressurized casting apparatus, the pressurized casting apparatus includes an operating mechanism for advancing and retracting a mold relative to a fixed mold, and a cavity is formed between opposing surfaces of the movable mold when the movable mold comes into contact with the fixed mold. A tapered fitting portion surrounding the cavity is formed on opposing surfaces of the mold and the movable mold, and the fixed mold is further provided with a mold clamping mechanism for clamping the movable mold, and the mold clamping mechanism is not in the operating position. a clamp member for crimping the movable mold to the fixed mold and allowing the movable mold to separate from the fixed mold at a non-operating position outside the movement locus of the movable mold; The invention also includes a drive device that can be driven between the operating position and the operating position.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a base, and a fixed mold 3 is placed on a fixed mold holder 2 on the upper surface of the base.
is fixed.

A plurality of guide posts 4 are erected on the base 1 around the fixed holder 2, and a mobile holder 5 is attached to the guide posts 4 so as to be movable up and down. A movable mold 6 is fixed to the lower surface of the movable mold holder 5 so as to be able to face the fixed mold 3, and an elevating hydraulic cylinder is used as an operating mechanism to move the movable mold 6 forward and backward relative to the fixed mold 3, and in the illustrated example, raises and lowers the movable mold 6. The mechanism 7 is attached to a support base (not shown), and the lower end of its piston rod 8 is connected to the moving type holder 5. Recesses 9 and 10 are formed on each opposing surface of the fixed mold 3 and the movable mold 6, and both molds 3
, 6 are polymerized, a cavity 11 for molding the product is formed by the cooperation of the recesses 9 and 10.

In addition, an annular convex portion 12 is formed on the mold matching surface around the concave portion 9 of the fixed mold 3.
and an annular groove 13 located on the outer periphery thereof, and the outer peripheral surface of each convex portion 12 is formed into a tapered surface 14 with a downward slope from the upper surface. On the other hand, an annular recess 15 and an annular groove 16 facing the annular protrusion 12 and annular groove 13 of the fixed mold 3 are respectively formed on the mold matching surface around the recess 10 of the moving mold 6, and the inner peripheral surface of the recess 15 is formed on a tapered surface 17 having a downward slope from the upper base. Therefore, when the moving mold 6 and the fixed mold 3 are superimposed, the mating surfaces of both the molds 3 and 6 are tapered-fitted, and leakage of molten metal from the cavity 11 is prevented. Further, by fitting the sealing member 18 into both the annular grooves 13 and 16, safety against leakage of molten metal is improved. Clamping flanges 19 and 20 are formed on the upper edge of the stationary mold 3 and the lower edge of the movable mold 6, respectively.

The upper surface of the flange 19 of the fixed mold 3 forms a flat outer peripheral part of the mold mating surface, while the lower surface of the flange 19 is formed into a tapered surface 21 having an upward slope from the outer peripheral surface of the fixed mold 3. The lower surface of the flange 20 of the moving mold 6 forms a flat outer peripheral portion of the mold mating surface, while the upper surface of the flange 20 is formed into a tapered surface 22 that slopes downward from the outer peripheral surface of the moving mold 6. A plurality of brackets 23 are attached to the fixed holder 2 at predetermined intervals.
Each bracket 23 supports a hydraulic cylinder 24, and the tip of the piston rod 25 has a tapered inner surface 27 that fits into the tapered surfaces 21, 22 of both the flanges 19, 20 of the fixed type 3 and the moving type 6. A clamping hand 26 is attached, and these hydraulic cylinder 24, piston rod 25, and mold clamping hand 26 constitute a mold clamping mechanism 28.

The mold clamping hand 26, in the operating position, faces the movement locus of the moving mold 6 (flange 20) and presses it against the fixed mold 3, and the hydraulic cylinder 24 holds the clamp member of the present invention. Each constitutes a drive device of the invention that can be driven between an operating position and a non-operating position. The town moving type holder 5 includes a hydraulic cylinder 30 and a pressure rod holder 3 connected to the lower end of the piston rod 31.
2, and a molten metal pressurizing mechanism 34 which is attached to the holder 32 and includes a plurality of pressurizing rods 33 passing through the movable holder 5 and the movable die 6.

The base 1 also includes a hydraulic cylinder 35, a pin holder 37 connected to the upper end of the piston rod 36, and a plurality of knockout pins 38 that are erected on the pin holder 37 and pass through the fixed mold holder 2 and the fixed mold 3. A knockout mechanism 39 is provided.

Further, a plunger 41 for pushing the molten metal into the cavity 11 is slidably connected to the cylinder portion 40 of the fixed holder 2 .

Set pins 42 and 43 project into the cavity 11 from the fixed mold 3, and are used to immovably hold the inorganic fiber molded body F in the cavity 11 when reinforcing the product with fibers.

For example, when reinforcing the rod part of a connecting rod for an internal combustion engine with fibers, both set pins 42 and 43 are located in the large end hole and small end hole forming part of the cavity 11, and are used to hold the rod-shaped fiber molded body F therein. It is. Next, to explain the casting operation using the above-mentioned device, first, each mold clamping hand 26 of the mold clamping mechanism 28 is set at the most retracted position, that is, outside the moving trajectory of the moving mold 6 (flange 20), and the fixed mold 3 The piston rod 8 of the lifting hydraulic cylinder mechanism 7 is extended to overlap the moving mold 6 with the fixed mold 3, and the annular protrusion 12 and the recess 15 are fitted in a tapered manner. Match.

Then, the piston rod 25 of the mold clamping mechanism 28 is extended to move the mold clamping hand 26 to an operating position where it taper-fits into each flanges 19, 20 of the fixed mold 3 and the movable mold 6 to clamp both molds 3, 6. The molds are moved forward until they reach , thereby completing the mold clamping of both molds 3 and 6. Thereafter, the molten metal is poured into the reservoir above the plunger 41 from a pouring port (not shown), and the plunger 41 is raised to push the molten metal into the cavity 11.

Then, the molten metal in the cavity 11 became semi-solidified.
At this point, the hydraulic cylinder 30 of the molten metal pressurizing mechanism 34 is operated to extend each pressurizing rod 33 and pressurize the molten metal. In this case, high pressure acts on the molten metal, so the reaction force causes both molds 3
, 6, but since both molds 3 and 6 are clamped by the mold clamping mechanism 28, they do not open, and the molten metal can be pressurized with a sufficiently high pressure. Furthermore, in the case where the mold clamping mechanism 28 is not provided, the reaction force also acts on each guide post 4 via the movable holder 5, so it is necessary to make them large in diameter to maintain rigidity. Since the reaction force can be supported by the mold clamping mechanism 28,
There is no problem even if each guide post 4 has a small diameter. Next, after the molten metal has completely solidified, the piston rod 25 of the mold clamping mechanism 28 is contracted, and the mold clamping hand 26 and both molds 3, 6 are closed.
The taper fitting with the flanges 19 and 20 is released, the piston rod 8 of the lifting hydraulic cylinder mechanism 7 is contracted to raise the movable mold 6, and the hydraulic cylinder 35 of the knockout mechanism 39 is actuated to cause each knockout pin 38 to This is to remove the product inside the fixed mold 3 outside the mold.

As described above, according to the present invention, there is provided a fixed mold, a movable mold that is removably opposed to the fixed mold, and a movable mold that is provided between the movable mold and the fixed mold to move the movable mold to the fixed mold. In the pressurized casting apparatus, the pressurized casting device has an operating mechanism that moves the moving mold forward and backward, and when the moving mold comes into contact with the fixed mold, a cavity is formed between the opposing surfaces of the molds. Since a mold clamping mechanism for clamping the movable mold is provided, the mold clamping mechanism allows the movable mold to be clamped to the fixed mold without any trouble, and the mold clamping mechanism can be used to clamp the movable mold to the stationary mold without any problem. It is no longer necessary to use a high-output actuation mechanism that can perform the process independently, and the actuation mechanism can be made smaller and the casting equipment can be made smaller, reducing manufacturing costs and occupying space. can contribute to

In particular, the mold clamping mechanism includes a clamp member that presses the movable mold to the fixed mold in an operating position, and in a non-operating position, the clamp member is outside the movement locus of the movable mold and allows the moving mold to separate from the fixed mold. and a drive device capable of driving the clamp member between the operating position and the non-operating position, so that the movable mold can be clamped by simply holding the clamp member of the mold clamping mechanism in the non-operating position. The movable mold can be smoothly moved forward and backward with respect to the fixed mold without any interference with the members, and therefore, even if a mold clamping mechanism is specially provided, there is no problem in the movement of the movable mold toward and away from the fixed mold.

Furthermore, since a tapered fitting portion surrounding the cavity is formed on the facing surfaces of the fixed mold and the movable mold, as the movable mold is strongly tightened to the fixed mold by the mold clamping mechanism,
The adhesive force of the tapered fitting portion between the opposing surfaces of those molds can enhance the sealing function, and as a result, the molten metal can be prevented from leaking to the outside through the mold mating surface from the cavity surrounded by the taper fitting portion. can be effectively prevented.

[Brief explanation of drawings]

The drawing is a longitudinal sectional front view of a real blood example of the present invention. 3... Fixed type, 6... Town moving type, 7...
...Elevating hydraulic cylinder mechanism as an operating mechanism, 11
... Cavity, 14, 17 ... Tapered surface as a tapered fitting part, 24 ... Hydraulic cylinder as a drive device, 26 ... ... As a clamp member mold clamping hand, 28... mold clamping mechanism.

Claims (1)

[Claims] 1. Consisting of a fixed mold, a movable mold disposed opposite to the fixed mold so as to be removable, and an operating mechanism provided between the movable mold and the fixed mold to move the movable mold forward and backward with respect to the fixed mold, In the pressure casting apparatus, in which a cavity is formed between opposing surfaces of the movable mold and the fixed mold when the movable mold comes into contact with the fixed mold, the cavity is surrounded by the opposing surface of the fixed mold and the movable mold. A tapered fitting part is formed, and the fixed mold is further provided with a mold clamping mechanism for clamping the movable mold, and the mold clamping mechanism presses the movable mold to the fixed mold in the operating position and presses the movable mold to the fixed mold in the non-operating position. A clamp member that is located outside the movement locus of the movable mold and allows the movable mold to be separated from the fixed mold, and a drive device that can drive the clamp member between the operating position and the non-operating position. Pressure casting equipment.