JPS62179860A - Low pressure casting apparatus - Google Patents

Abstract

PURPOSE:To improve safety for a low pressure casting apparatus by arranging the first carrier, which arranges a core holding mechanism as movable vertically, and the second carrier, which arranges an upper die-base as movable vertically direction, at just over a lower die-base as movable backward and forward, so as to set the core into the lower die automatically. CONSTITUTION:A core (C) is held by the core holding mechanism 23. The first carrier 12 is shifted toward right direction, to shift the core holding mechanism 23, which holds the core (C) just above the lower die 6 and set the core (C) into the lower die 6. Next, the first carrier 12 is shifted toward left direction. Further, the second carrier 34 is shifted toward left direction, and the upper die 37 is descended together with the upper die-base 36, the match the upper die 37 with the lower die 6. Molten metal is poured under pressure into the mold and after solidification, the upper die 37 is detached from the lower die 6 and the second carrier 34 is shifted toward right direction to take out the casting products. By this low pressure casting apparatus, the core is set automatically and excellent effect is obtd.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a so-called low-pressure casting device that presses molten metal into a mold using gas pressure, and more specifically, a core is automatically set in a mold. This invention relates to a low-pressure casting device equipped with a core setter that can be used.

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

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a low-pressure casting apparatus 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. (1) is a gate-shaped frame, and a molten metal holding furnace (2) is mounted on a cart (4) and provided inside the lower position of the gate-shaped frame (1).

In addition, a lower die base (7) is fixed to a position slightly above the holding furnace (2) in the portal frame (1), and the lower die base (7)
): First cart (23): Core gripping mechanism (2
5) : Core surface plate (34) : 2nd cart (36
): Upper die base (37): Upper die core (C)
Grasp (C). Next, the cylinder (22) (2
2) is contracted and its piston opening/throat is placed on the core surface plate (
25) Pull it out from (25), and then remove it from the cylinder (1
6) Shrink the piston rod (16a) to form the core (C)
The core gripping mechanism (23) (23) that grips (C) is raised, and the cores (b) and (C) are held on the core surface plate (25) (2!
l>) Lift it up from above. Next, the cylinder (26) is operated to move the empty core surface plate (25), and the motor with reducer (14) is driven to move the first truck (12).
to the right, the core gripping mechanism (23) (23) gripping the core (C) (C) is transferred to directly above the lower mold (6), and then the cylinder (32) is extended. The first operation
The lower part of the second gripping member (30) (31) is closed and a predetermined portion (not shown) of the first cart (12) is clamped, and the first
Positioning of the cart (12), core gripping mechanism (23), etc. is performed. Next, the piston rod (16a) of the cylinder (16) is extended to a required length to open the cylinder (22).
After bringing the piston rod (22) close to the lower mold (6),
The cylinder (22) (22) is extended and its piston mouth and throat are inserted into a predetermined hole (not shown) of the lower mold (6), and the core gripping mechanism (23) (23) is positioned;
Next, the cylinder (16) is further extended and the core gripping mechanism (23) is lowered to lower the core (C) (C
) into a predetermined hole (not shown) of the lower mold (6).

Next, the compressed air is discharged from the core gripping mechanism (23) (23) to remove the core (C) of the core gripping mechanism (23) (23).
) Release the grip on (C'), then contract the piston rod (16a) of the cylinder (16), and lift the lifting frame (19) and core gripping mechanism (23) (23)
etc., thereby raising the core (C) (C) to the lower mold (
6). Next, the cylinder (32) is contracted to open the lower portions of the first and second gripping members (30, 31), and the positioning mechanism (28) is released from the first carriage (12). Next, the motor with reducer (14
) 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 (34) is moved to the left. Then, the upper mold (37) is transferred directly above the lower mold (6), and then the cylinder (32) of the positioning mechanism (23) is moved to the first truck (1).
As in case 2), the second carriage (34) is fixed and positioned at the same time by the extension operation. Next, cylinder (3
5) by extending the piston rod (35a) and lowering the upper mold (37) together with the upper die base (36).
7) to the lower mold (6), then the upper and lower molds (37)
The molten metal in the holding furnace (2) is press-fitted into the cavity (not shown) defined by (6) through the stalk (5), and after the press-fitted molten metal has solidified to some extent, the cylinder (35) is The piston rod (35a) is contracted to separate the f" mold (37) from the lower mold (6) and raise it. Then, the product is released from the lower mold (6) and adheres to the upper mold (37). and be made to rise.

Next, the cylinder (32) is contracted to release the clamping state of the positioning mechanism (28) from the second cart (34), and then the second cart (34) is moved to the right and the product is attached to the top. The mold (37) is transferred directly above the product receiving mechanism (41).

Next, the cylinder (44) is extended to release the receiving member (
After lifting the cylinder (45), the product is released from the upper mold (37) and dropped onto the receiving member (45).
The receiving member (45) is lowered by the contraction operation in step 4). By repeating the above operations, predetermined products can be manufactured intermittently. In addition, the cylinders (26) and (27) are alternately expanded and contracted to hold the core (C) (C) with the upper and lower core surface plates (25) (25) and the core gripping mechanism (23) (
23).

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. Further, the first and second carts (12) and (34) may be driven by cylinders.

(Effects of the Invention) As is clear from the above description, the present invention provides a first truck (12) on which a core gripping mechanism (23) is mounted so as to be movable up and down, and an upper die base (36) on which the upper die base (36) is mounted so as to be movable up and down. Since the second trolley (34) is installed so that it can advance and retreat directly above the lower die base (7), the core can be automatically set in the lower mold (6) attached to the lower die base (7). It has excellent effects.

[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.

Claims (1)

[Claims] 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 core surface plate (25) to reciprocate between them. 1 truck (
12) is equipped with a core gripping mechanism (23) that can be raised and lowered,
Furthermore, the lower die base (7) and the product receiving mechanism (
The second cart (34) that reciprocates between these above the
), and an upper die base (36) to which an upper die (37) is attached is attached to the second truck (34) so as to be movable up and down.