JPS6326251A - Low-pressure casting device - Google Patents

Abstract

PURPOSE:To execute surer carrying in and out of a casting mold by providing U-shaped grooves to a molding board, disposing rails liftably thereto and providing liftable extension rails and fork carriages to both ends of the rails. CONSTITUTION:The rails 11 are provided in a pair of the U-shaped grooves penetrated through the molding board 3 to be imposed with the casting mold. The rails 18, 18a are respectively disposed onto the extension lines at both ends thereof and further the fork carriages 21, 21a which move onto and out of the molding board 3 are installed on the molding board via the rails 11, 18, 18a. The sand mold 25 on a table 16 is transferred onto the molding board 3 by lifting of the rails 11, 18 and the carriage 21 and after a keep plate 7 is lowered, the low-pressure casting is executed. The casting mold 25 after the casting is ejected by the carriage 21a on the opposite side and the lifting of the rails 18a, 11. Since the casting mold 25 is smoothly put onto and out of the molding board 3 by the rails 11, 18, 18a, the sure carrying in and out of the sand mold 25 which is liable to break are executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus suitable for low-pressure casting of aluminum products and the like using a sand mold.

(Prior technology) In recent years, pouring work, which is the most severe work in casting work, has been reconsidered, and automatic pouring machines are becoming more widespread. The low-pressure casting method, which also has the following functions, is gaining recognition again.

On the other hand, most conventional low-pressure casting equipment performs casting using molds with predetermined conditions, and as with sand molds, 1) damage < 2) mold size changes frequently 3) There is a problem in that it is not possible to adequately deal with conflicts in the mold outer wall that are not sufficiently accurate when carrying in and out of the mold. (Objective of the Invention) The present invention is intended to solve the above problem. To provide a low-pressure casting device which can perform casting by reliably transporting sand molds to and from a casting position. 1
) is a holding furnace installed inside a pit (2), and a surface plate (3) is fixedly arranged above the holding furnace (1) via support legs (4). The disk (3) has a stalk pipe (
3a), and a gate-shaped frame (5) is erected on the upper surface.

A downward cylinder (6) is installed on the ceiling of the portal frame (5).
A mold valve plate (7) is connected to the tip of the piston rod of the cylinder (6). Guide rods (8) (8) are connected to the back of the mold valve plate (7) and slide on guide tubes (9) (9) provided on the ceiling of the portal frame (5). It is freely penetrated and fitted. Furthermore, the surface plate (3) has a U that penetrates in the left and right direction.
Shape grooves (10) (10) are bored at predetermined intervals in the front and back direction, and rails Ql (11) pass through the V-shape grooves (10) (10) from side to side. It is arranged so that it can move up and down.

The left and right end positions of the rail 01) (11) are located at the support legs (
4) The piston rod (14) of the upward cylinder (13) (13) attached to (4) via the frame (12) (12) is connected to the rail (11).
) (11) is raised and lowered by the operation of cylinders (13x13). On both left and right outer sides of the surface plate (3), there are tables (16) supported by support legs (15) (15a) and made to have the same height as the surface plate (3).
(16a) is provided, the table (16) (
16a) has two U-shaped grooves (17
) (17) (17a) (17a) is the surface plate (3)
) is provided at the extension position of the U-shaped groove (10) (10) ・The V-shaped groove (17) (17) (17a)
Inside (17a) is a rail (18) (18) (18a)
) (18a) penetrates left and right and the rail (18a)
1) The rails (18) (18) (18a) (18a
) is connected to the piston rod of an upward cylinder (20x20) (20a) (20a) attached to the support leg (15) (15a) via the frame (19) (19a). Rail (18) (18)
(18a,) (18a) is the cylinder (20) (2
0) (20a) It is designed to go up and down by the operation of (20 &).

Furthermore, the rail (18) (18) (18a) (1
8a) has a U-shaped Hawk trolley (21) (21a).
) are engaged through the wheels (22) (22a), and the hawk portion of the hawk truck (21 In addition, the rails (18) (18) (18a) (1
With table 8a) in its lowest position, the table (16) (1
6) Bracket with a height that protrudes slightly above the top surface)
(23) (23) (23a) (23a) and are connected via connecting bars (24) (24a).

The hawk truck (21) (21a) is engaged and connected to a drive device (not shown) so as to be able to slide up and down, and is reciprocated to a predetermined position on the surface plate (3). Note that (25) in the figure is a sand mold.

(Operation of the invention) To explain the operation of the device configured as described above, the upper surface of the hawk of the hawk truck (21) has a U-shaped groove (17) (
The sand mold (
25) is positioned and placed at a predetermined position on the table (16). Next, operate the cylinders (13) (13) and cylinders (20) (20) to operate the rails (11) (1
1) (18) Raise (18). As a result of this operation, the Hawk truck (21) is also raised, and the sand mold (25) placed on the table (16) is moved to the Hawk truck (21).
is lifted by the rail (11) (11
) and the rail (18) (18) are brought to the same level at a high position.

Next, a drive device (not shown) operates to move the Hawk truck (21) on which the sand mold (25) is placed onto the rail (18) (11
) to a predetermined position above the surface plate (3), the cylinders (13) (13) (20) (20) operate in reverse and the rails (11) (11) (18) (18
) is lowered by this operation, the hawk cart (21) is also lowered into the U-shaped groove (10) of the surface plate (3), and the sand mold (
25) is transferred to a predetermined position 1d on the surface plate (3).

Next, the drive device (not shown) operates in reverse and the Hawk truck (2
1) is returned to its original position on the table (16).

Subsequently, the cylinder (6) is activated to lower the mold valve plate (7) and press the top surface of the sand mold (25) with a predetermined pressure to prevent the sand mold (25) from floating. Compressed air is supplied into the holding furnace (1), and molten metal is supplied to the cavity of the sand mold (25) through the stalk pipe (3a). By continuing this state for a certain period of time, the molten metal in the cavity solidifies, the supply of compressed air is stopped, and by exhausting the pressure in the holding furnace (1), the molten metal in the stalk pipe (3a) solidifies. ) During this time, another sand mold (25) is positioned and placed on the table (16).

Next, the cylinder (6) operates in reverse to raise the mold valve plate (7), and then a drive device (not shown) operates to move the hawk truck (21a) onto the surface plate via the rails (18a) and (11). (3), then move each cylinder (
13) (20) (21ri → operates and each rail Ql
) (18) Raise (18a). As a result of this operation, the poured sand mold (25) is lifted by the Hawk truck (21a), and a new sand mold (25) is lifted by the Hawk truck (21), and the rail (11)
(18) (18a) are brought to the same level at a higher position.

Next, a drive device (not shown) operates in reverse to move the poured sand mold (25) along with the Hawk cart (2]j) to the table (1).
At the same time, the hawk carriage (21) is moved to the position of the surface plate (3) and the new sand mold (25) is moved to a position above the surface plate (3).

Further, the poured sand mold (25) moved to the position of the table (16a) is lowered together with the rail (18a) (18a) and the Hawk truck (21a) by the reverse operation of the cylinder (20a), and is lowered together with the table (16a). ) and removed from the table (16a) by a device not shown. Thereafter, the above operation is repeated.

In the above embodiment, the sand mold (25) is replaced by the Hawk truck (21).
When placing the sand mold (25) on the table (16) (16a) or removing it from the Hawk cart (21a), each operation is performed after placing the sand mold (25) on the table (16) (16a). ) or directly remove the sand mold (25) from the hawk cart (21a), the table (16) (16a) with the U-shaped groove (17) (17a) except rail (18)
(18) (18a) Only (18a) may be arranged so that it can be raised and lowered.

(Effects of the Invention) As is clear from the above description, the present invention provides U-shaped grooves on the left and right sides of the surface plate in a low-pressure casting machine that is composed of a holding furnace and a surface plate for placing a mold equipped with a stalk pipe. A rail is installed in the V-shaped groove so as to be movable up and down, and loading and unloading rails extending in the direction of extension of the rail are installed on the outside of both ends of the rail so that the rail can be moved up and down. Since the construction is such that Hawk carts that can move in and out of the U-shaped groove are arranged on each of the loading and unloading rails so as to be movable back and forth to the surface plate position, damage can be prevented. Even sand molds whose size is frequently changed and whose outer walls do not have sufficient accuracy can be reliably moved to the surface plate position of the low-pressure casting machine using the carrying hawk cart, and the molds have already been poured. It is now possible to reliably scoop up and transport 8 from the surface plate using a hawk cart for transport, which was considered to be a problem with low-pressure casting using sand molds.
It has the excellent effect of being able to resolve all issues.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. FIG. 1 is a partially cutaway front view, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG. 3 is a B-- It is a view from arrow B.

Claims (1)

[Claims] U-shaped grooves (10) (10) are provided in the surface plate (3) of a low-pressure casting machine that is composed of a holding furnace (1) and a surface plate (3) for placing the mold equipped with a stalk pipe (3a). are drilled through the U-shaped grooves (10) (10), and rails (11) (11) are movable up and down in the U-shaped grooves (10) (10). ) on the outside of both ends of the rail (
11) A rail (18) extending in the direction of extension of (11) (1
8) (18a) (18a) is arranged so as to be movable up and down,
and each rail (18) (18), (18a) (18a
) are provided with hawk carts (21) (21a) that can move in and out of the U-shaped grooves (10) (10) and move back and forth to the surface plate (3) position, respectively. casting equipment