JPH044068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a so-called low-pressure casting device that presses molten metal into a mold through a pneumatic body, and more specifically, a device that automatically sets a core in a mold. This invention relates to a low-pressure casting device equipped with a core setter.

(Prior art) In conventional low-pressure casting equipment, the core is manually set in the mold by an operator while the mold is heated by molten metal and reaches a high temperature. This is a big problem in terms of safety and health, and the industry has therefore been demanding the emergence of low-pressure casting equipment equipped with an automatic core setter.

(Object of the invention) The present invention was made in view of the above circumstances, and
The object of the present invention is to provide a low-pressure casting device equipped with an automatic core setter.

(Embodiment of the Invention) Hereinafter, an embodiment of the present invention will be described in detail based on the drawings. Reference numeral 1 denotes a gate-shaped frame, and a molten metal holding furnace 2 is mounted on a cart 4 inside the gate-shaped frame 1 at a lower position. Also,
A lower die base 7 is fixed to a position slightly above the holding furnace 2 in the gate-shaped frame 1, and a lower die 6 that communicates with the holding furnace 2 via a stalk 5 is attached to the lower die base 7. Furthermore, in the upper position of the gate-shaped frame 1, a rail 8 extending in the left-right direction,
8 is provided via a frame-like frame 9, and both left and right ends of the frame-like frame 9 are supported by pillars 10 and 11. A first truck 12 is placed on the left side of the rails 8, 8 so as to be able to move left and right, and as shown in FIG. It is driven by a motor 14 with a reduction gear installed at 13, and a transmission mechanism 15 consisting of a chain gear and a roller chain. Further, as shown in FIG. 1, a downward cylinder 16 is attached to the center of the first truck 12 so as to pass through the first truck 12, and the lower end of the piston rod 16a of the cylinder 16 is attached to the center of the lifting member 17. The parts are fixed. An elevating frame 19 is vertically installed on the elevating member 17 via two pairs of link mechanisms 18 and 18 so as to be able to swing freely from side to side. Guide bars 21, 21 are erected and slidably fit through the holders 20, 20. In addition, on both front and rear sides of the elevating frame 19,
Downward cylinders 22, 22 are fixed, and core gripping mechanisms 23, 23 are attached to both the left and right sides of the lifting frame 19, and the core gripping mechanisms 23, 23, for example, The core C is inserted into a predetermined hole and then expanded by supplying compressed air to grip the core C.
Reference numeral 24 denotes a surface plate support frame disposed on the lower left side of the rails 8, 8, and the surface plate support frame 24 includes a core surface plate 2 that can reciprocate in the front and back direction.
5 and 25 are arranged at a required interval in the vertical direction, and the core surface plates 25 and 25 are connected to the cylinder 2.
It is designed to reciprocate back and forth by the expansion and contraction operations of 6 and 27. Furthermore, a stopper 46 for the first truck 12 is fixed to the left end of the frame-like frame 9. In addition, a positioning mechanism 28 that alternately fixes the first cart 12 and a second cart 34 (described later) in a predetermined position is attached via a support frame 29 at a position directly above the holding furnace 2 in the upper part of the frame-like frame 9. (See FIG. 2), the positioning mechanism 28 includes first and second gripping members 30 and 31 that are pivotally attached to a support frame 29 so as to be rotatable left and right, and a first gripping member 3.
A horizontal cylinder 32 is pivotally supported on the upper part of the second gripping member 31 and the tip of its piston rod is connected with a pin to the upper part of the second gripping member 31.
It is comprised of a stopper 33 for positioning the second gripping members 30, 31.

Also, a second cart 3 is located on the right side above the rails 8, 8.
4 is placed so as to be able to run left and right, and a downward cylinder 35 is mounted in the center of the second truck 34.
It is installed through the And cylinder 3
The center portion of an upper die base 36 with a built-in product extrusion mechanism is fixed to the lower end of the piston rod 35a of No. 5, and an upper mold 37 is attached to the lower surface of the upper die base 36. Further, on the upper surface of the upper die base 36, holders 38, 38 fixed to the second cart 34 are provided.
Guide bars 39, 39 that slidably fit and pass through the
In addition, a stopper 40 for the second truck 34 is fixed to the right end of the frame 9. Reference numeral 41 denotes a product receiving mechanism that receives the product released from the upper mold 37 and conveys it to a predetermined position, and is installed on a transfer member 42 constructed between the gate frame 1 and the support column 11. The product receiving mechanism 41 includes a truck 43 arranged to be able to reciprocate back and forth, and a receiving member 45 mounted on the truck 43 via a cylinder 44 so as to be movable up and down.

(Operation of the invention) Next, the operation of the device configured as described above will be explained. From the state shown in the figure, first cylinder 2
2 and 22 are extended to fit the lower ends of the piston rods into predetermined holes (not shown) in the core base plates 25 and 25, and the core C is positioned via the core base plates 25 and 25.

Next, the piston rod 16a of the cylinder 16
is extended and the core gripping mechanisms 23, 23 are lowered together with the lifting frame 19.
3 into predetermined holes (not shown) of the cores C, C, and then compressed air is supplied to the core gripping mechanisms 23, 23 to grip the cores C, C. Next, the cylinders 22, 22 are contracted to extract the piston rods from the core surface plates 25, 25, and then,
The piston rod 16a of the cylinder 16 is contracted to raise the core gripping mechanisms 23, 23 that grip the cores C, C, and lift the cores C, C from the core surface plates 25, 25. Next, the cylinder 26 is actuated to move the empty core surface plate 25, and the motor 14 with a reduction gear is driven to move the first cart 12 to the right to grip the cores C, C. Core gripping mechanism 2
3 and 23 directly above the lower mold 6, and then the cylinder 32 is extended to release the first and second gripping members 3.
0 and 31 are closed and a predetermined portion (not shown) of the first carriage 12 is clamped, the first carriage 12, core gripping mechanisms 23, 23, etc. are positioned. Next, the piston rods 16a of the cylinders 16 are extended to a required length to bring the piston rods of the cylinders 22, 22 closer to the lower mold 6, and then the cylinders 22, 22 are extended and the piston rods are inserted into the predetermined holes of the lower mold 6 (not shown). ), and the core gripping mechanism 23, 2
3 is positioned, and then the cylinder 16 is further extended to lower the core gripping mechanisms 23, 23 and insert the cores C, C into predetermined holes (not shown) in the lower mold 6.

Next, the compressed air is discharged from the core gripping mechanisms 23, 23, and the cores C, C of the core gripping mechanisms 23, 23 are removed.
Release the grip on the cylinder 16, and then release the grip on the cylinder 16.
The piston rod 16a is contracted to raise the elevating frame 19, the core gripping mechanisms 23, 23, etc.
As a result, the cores C and C are set in the lower mold 6. Next, the cylinder 32 is contracted to open the lower portions of the first and second gripping members 30 and 31, and the positioning mechanism 2 is opened.
8 is released from the clamped state on the first truck 12.
Next, the motor 14 with a speed reducer is reversely driven to move the first cart 12 to the left, the stopper 46 stops the first cart 12 at a predetermined position, and then the second cart 12 is moved to the left.
The cart 34 is moved to the left to transfer the upper die 37 directly above the lower die 6, and then the cylinder 32 of the positioning mechanism 23 is extended in the same manner as the first cart 12 to move the upper die 37 to the second cart 34. is fixed and positioned at the same time. Next, the piston rod 3 of the cylinder 35
5a and the upper mold 3 together with the upper die base 36.
7 is lowered to align the upper mold 37 with the lower mold 6, and then the molten metal in the holding furnace 2 is press-fitted through the stalk 5 into a cavity (not shown) defined by the upper and lower molds 37 and 6. After the press-fitted molten metal has solidified to some extent, the piston rod 35a of the cylinder 35 is contracted to separate the upper mold 37 from the lower mold 6 and raise it. Then, the product is released from the lower mold 6,
It adheres to the upper die 37 and is raised. Next, the cylinder 32 is contracted to move the positioning mechanism 2.
8 is released from the clamped state on the second truck 34,
Subsequently, the second cart 34 is moved to the right to transfer the upper die 37 with the product attached thereto directly above the product receiving mechanism 41.

Next, after the cylinder 44 is extended to raise the receiving member 45, the product is released from the upper mold 37 and dropped onto the receiving member 45, and then the cylinder 44 is contracted to lower the receiving member 45. By repeating the above operations, predetermined products can be manufactured intermittently. Note that the cylinder 26,
The core gripping mechanism 23, 2 is held by the upper and lower core surface plates 25, 25 by alternately expanding and contracting the cores C, 27.
3, so that they are alternately conveyed directly below.

In addition, in the above embodiment, the first and second carts 12,
34 is moved by a pair of rails 8, but it may be moved by two pairs of rails. In addition, the first and second carts 12,
34 may be driven by a cylinder.

(Effect of the invention) As is clear from the above explanation, the present invention has the following effects:
The first cart 12 on which the core gripping mechanism 23 is mounted so as to be movable up and down, and the second cart 34 on which the upper die base 36 is mounted so as to be movable up and down are provided so as to be able to move forward and backward directly above the lower die base 7. This provides excellent effects such as automatically setting the core in the lower mold 6 attached to the mold.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, and FIG. 2 is a left side view of FIG. 1. 6: Lower mold, 7: Lower die base, 12: First truck, 23: Core gripping mechanism, 25: Core surface plate, 3
4: Second truck, 36: Upper die base, 37: Upper mold.

Claims (1)

[Claims] 1. A lower die base 7 to which the lower mold 6 is attached, a core surface plate 25 for temporarily holding the core, and a product receiving mechanism 41 that receives the product released from the upper mold 37.
are arranged at appropriate intervals in the horizontal direction, and a first cart 12 is provided above the lower die base 7 and the core surface plate 25 to reciprocate between them. A child gripping mechanism 23 is mounted so as to be able to rise and fall, and a second
A low-pressure casting apparatus characterized in that a truck 34 is provided, and an upper die base 36 to which an upper mold 37 is attached is mounted on the second truck 34 so as to be movable up and down.