JPS58100941A - Die device for molding of gas hardening type mold - Google Patents

Abstract

PURPOSE:To mount an evacuating hose in one place and to facilitate handling by providing a gas passage which communicates the hollow part for molding of molds in a pair of right and left dies and the hollow part of a bottom die. CONSTITUTION:A movable side 13 and a stationary side 14 are brought into tight contact with each other to form a hollow part 4 for molding of molds in a die body 2. Molding sand for core which is hardened by contact with hardening gas is blown through the blow part 19 in the upper part of the part 4 to form a core 21 in the part 4. The hardening gas is blown through the port 19 to harden the core 21. At this time, the hardening gas passes through vent holes 7 and enters the hollow part 15a of a bottom die by passing through the gas passage of a gas communicating hole 16 via a clearance 6 and is discharged to the outside through an evacuating hose 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas hardening type mold making device. As is well known, an /s mold is required to cast molten metal into a certain shape and size.

Generally, a mold consists of a mother mold and a core, and is formed using a sand mold. As a mold manufacturing method, there is a gas curing blow molding method in which a curing gas such as CO2 gas, asyn gas, SO gas, etc. is blown into the mold to harden the mold. There is a vertically split mold device used in this method, and the conventional device had a structure as shown in FIG.

That is, (a) is a pair of mold bodies divided into left and right parts, each body (a) is supported by a mounting frame (b), and one is a movable side (d) that can be moved in the left and right direction with a cylinder etc. ), and the other side is the fixed side (e). (f) is a mandrel that protrudes into a hollow part (g) formed in the mold body (a). (h) is an extrusion device which releases the mold (1) in which the hollow part (g) K has been formed from the mold body (a). (j) is a blowing port and hardening gas blowing port for blowing in casting sand that hardens upon contact with hardening gas. (
K) is a vent hole, which allows the air in the hollow part (g) to escape during the injection of casting sand, and also allows the curing gas to escape. (
1) is a discharge hole, which discharges the air and gas described in 1 to the outside, and is provided in the mounting frame (b).

In such a conventional structure, the movable side (d) and the fixed side (e
), and if necessary, exhaust pipes must be installed from the 3-way bottom of the mandrel (f). In particular, a long hose must be installed on the movable side (d), making handling operations difficult. It was difficult.

Therefore, the present invention was devised in view of the above problems, and is a gas-curing casting method that requires only one exhaust hose and is extremely easy to handle and operate. The entire purpose is to provide a mold device u for IA molding.

Therefore, its characteristic feature is a pair of gold/fJ! and a lower mold that spans the surfaces of the pair of molds, and a gas communication passage that communicates the mold-making hollow part with the lower mold hollow part inside the lower mold is provided in the pair of molds and the lower mold. be.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figures 2 and 3 show an example of the present invention, fl)
is a pair of left and right molds, the mold (1) is a mold body (2)
and a support mold (3). A pair of left and right mold bodies (2
), the core etc. f: Hollow part for mold making (
4) is formed. A support metal tu (3) is removably fitted and fixed on the back side of this mold body (2), and both +2
1 (3) is provided with a 1 ml gap (6) opening in the shape of a slit on the bottom surface (5). Mold body +21
K has a plurality of vent holes (7) that communicate the hollow part (4) and the gap (6). The gap (6) is sealed from the outside except for the opening in the bottom (5).

55 (8) is a mounting frame, which is provided on the back side of the support mold (3), and the extrusion device (9) is installed in the space formed between the mounting frame (8) and the support mold (3). ing. This extrusion device (9)
a plurality of extrusion pins α0 that penetrate the support mold (3) and the mold body (2) and protrude freely into the hollow part (4);
It consists of an extrusion plate (11) that connects all the ends of the plurality of extrusion pins Ql and simultaneously operates the extrusion pins Ql, and the plate (11) is pushed by a cylinder (12) or the like. One of the left and right molds (1) is a movable side (13) that can be moved in the left-right direction, and the other is a fixed side (14).

The lower mold (15) extends between the pair of molds t13) (14).
) is provided. under! ++a) is movable downward, a lower mold hollow part (15a) is formed inside the lower mold (15), and a gas vent (16) is provided that communicates the lower mold hollow part (15a) with the gap (6). It is opened at the contact surface (15b) of the lower mold (15) to the mold tll.

And it is connected to an exhaust hose (I no is lower ffi! +15) that communicates the hollow @ (15a) inside the lower mold (15) with the outside.

The vent hole (7) and the space (6) are between the mold making hollow part (4) in the mold (11) and the lower mold hollow part (
15a) constitutes a gas communication path that communicates with the gas vent (
16) is the gas communication 111 in the lower mold 115)! It consists of

081 is a mandrel, which is installed on the lower mold α
2) Naka'JI! It stands out in the capital (4). Reference numeral (19) denotes a blowing port, which is opened at the upper part of the mold body (2). (20
) is a gutting head. The mandrel (18) is removably attached to the lower mold 06), and can be removed depending on the type of mold to be molded.

According to the '$1 embodiment of the present invention, the movable side (13) and the fixed side (141) are brought into close contact with each other, and the entire mold forming hollow part (4) is formed inside the mold body (2). , molding sand for cores that is hardened by contact with hardening gas is blown into the hollow m(4) from the blowing port (19) at the upper part thereof, and the core +
21J is formed, and then hardening gas is blown in from the blowing port 09) to harden the core Qυ. At this time, the curing gas passes through the vent hole (7)'Jk and the gap (6).
The gas passes through the entire gas vent (161), that is, the gas vent path, enters the lower mold hollow part (+5a), and is discharged to the outside through the exhaust hose (17'l).

Next, as shown in FIG. 3, the mandrel α8) is
The mold 0xu moves downward to the position where it separates from l+, and the movable side (13) moves, and the extrusion device 1 (9) on the fixed side (14) pushes the core C2υ and the fixed side (14).
The mold body (2) is released. The core α is on the movable side (13
) is attached to the mold body (2), and the movable 1μlJ [
+3). After moving a certain distance in the horizontal direction, the movable side (13) changes its direction by 90° and moves the core (12+'
Then, the core (12) is finned downward from the mold body (2) on the movable side (13) by the extrusion device (9) and discharged onto a transfer device such as a belt conveyor.

In this way, in the above embodiment, the lower mold (15) is
Since the hose is installed in the same position, there is no need for a long hose as in the past, making it easier to handle and operate.

The one shown in Fig. 4 is the second embodiment of the present invention, in which the mandrel (18) is hollow, and the curing gas is blown into the mandrel (inside the country). is the same as the first embodiment. In this case, the lower mold hollow part (1
5a) is divided into two layers, and the curing gas inlet (goods) is located at the bottom of the mold.
5) It is convenient to be able to centrally manage the exhaust and air inlets as shown in Figure 5).

Note that the present invention is not limited to the above embodiments,
The mold body and the support mold may be integrally formed. Further, the other of the pair of metals may not be completely fixed, but both may be movable in the left and right direction.

Also, the mold body (2) on the movable side (I3) and the fixed side (14)
On the other hand, the surface shape of the hollow part (4) for @j mold construction of the mold body (2) may be made different.

Further, the present invention can be applied not only to the molding of the core but also to the entire mold including the mother mold.

According to the present invention, the exhaust hose only needs to be stored in one place, making handling and operation convenient.

[Brief explanation of drawings]

Figure 1 is a partially sectional side view showing a conventional example, Figures 2 and 3.
The figure is a partially sectional side view showing a first embodiment of the invention, and FIG. 4 is a partially sectional side view showing a second embodiment of the invention. f+)...Mold, (4)...Hollow part, i+5)...
・Lower mold. JP-A-58-100941 (3)

Claims (1)

[Claims] 1. Consisting of a pair of left and right molds that form a mold-making hollow part inside, and a lower mold extending between the pair of molds, the mold-making hollow part and the lower mold hollow part inside the lower mold communicate with each other. A mold device for a gas hardening type casting mold, characterized in that a gas communication passage is provided in the pair of molds and the lower mold.