JPS6312703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lower mold device for a horizontally split mold in a gas hardening type mold making machine used when molds are made by a cold box method or the like.

Generally, a sealed space is configured at the bottom of the lower mold in the lower mold device of a gas-curing mold making machine, and the curing gas discharged from the mold is once collected in this sealed space and then neutralized through a conduit. Conventionally, this sealed space is constructed by attaching a box with an open top to the back of the lower mold using bolts and nuts, and then fixing this box to a lifting table. Therefore, replacing the mold requires removing and installing many bolts, which is very time-consuming, and also causes the mixing sand to leak from the vent plug of the mold and into the sealed space. However, there were problems in that it was extremely troublesome to discharge the accumulated kneading sand and clean the sealed space.

The present invention has been made to solve the above problems, and one embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 1 denotes a rectangular base set on a foundation, and an upwardly facing cylinder 2 is installed at the center of the base 1. The cylinder 2 has a double structure, and its piston rod 3 also has an upwardly facing cylinder 4, and furthermore, at the upper end of the piston rod 3,
A side wall 5 having a rectangular plate shape and having a low height on the entire periphery
A lifting table 5 is fixed to the cylinder 4 and also serves as a front cover of the cylinder 4. A frame-shaped sealing member 6 is provided on the side wall 5a of the lifting table 5.
is attached, and an exhaust pipe 7 which also serves as a guide pin is vertically installed at a corner position of the lifting table 5 and fitted into a holder 8 provided on the front cover of the cylinder 2 so as to be able to slide vertically. . The lower end of the exhaust pipe 7 is connected to a hardening gas neutralization device (not shown) via a flexible pipe, and the upper end of the piston rod 9 of the cylinder 4 is connected to a push-out plate 17 for pushing up a push-out plate 17, which will be described later. A push-up plate 10 is fixed. Also,
Supports 11, 11 are erected at the four corner positions of the base 1, and two bridge members 12, 12 oriented in the front-rear direction are installed opposite each other at the lower positions of the supports 11, 11. . Rail members 13, 13 are laid on the transfer members 12, 12, and a frame-shaped cart 14 having an opening 14a through which the elevating table 5 can pass is mounted between the rail members 13, 13 so as to be movable forward and backward. It is suspended. On the trolley 14 is a flange portion 1 having the same outer dimensions as the side wall 5a of the lifting table 5 and projecting outward at the upper end.
A hook member 15 having a hook 5a is located above the seal member 6, passes through the opening 14a of the truck 14, and is mounted on the truck 14 so as to be able to rise freely with a flange portion 15a hooked onto the truck 14. A lower mold 16 of the horizontally split mold is fixed on the hook member 15, and a plurality of extrusion pins 18, 18 connected by an extrusion plate 17 are suspended on the lower mold 16 so as to be able to rise freely. There is. 19 is a horizontal cylinder for reciprocating the trolley 14, which is attached to the transfer member 12;
The tip of this piston rod is bracket 2.
0 to the truck 14. Reference numeral 21 denotes a stopper for positioning the trolley 14, which is fixed on the transfer member 12. An upper mold 22 is paired with the lower mold 16 and has a mixing sand blowing hole 22a, and is located above the lower mold 16 and directly above the lifting table 5. A stopper 24, which is supported on support members 23, 23 fixed to
24 prevents it from rising. Reference numeral 25 denotes a guide member for preventing the hook member 15 from shifting to the left or right and preventing the lower mold 16 from rising when the mold is pushed up from the lower mold 16. is fixed to.

With this structure, when the elevating table 5 is raised by the extension operation of the cylinder 2, a hook member 15 on which the lower mold 16 is placed is placed on the side wall 5a of the elevating table 5 with a seal member 6 interposed therebetween. The upper mold 22 is crimped onto the lower mold 16, and a sealed space is defined by the lower mold 16, the hook member 15, the seal member 6, and the lifting table 5, and the stoppers 24, 24 The upper and lower molds 22 and 16, the hook member 15, etc. are clamped by the lifting table 5. Next, a blowing head (not shown) is lowered and brought into contact with the upper mold 22 to form the blowing hole 22a.
From there, a predetermined amount of kneaded sand is blown into the cavities of the upper and lower molds 22 and 16, and after the blowing of the kneaded sand is completed, the blowing head is carried out from above the upper mold 22, and then a gushing head (not shown) is moved over the upper mold 22. The upper mold 22
The upper and lower molds 2 are brought into contact with each other through the blowing hole 22a.
A predetermined hardening gas is blown into cavities 2 and 16. Then, the hardening gas flows through the kneaded sand and passes through a vent plug (not shown) to the hook member 1.
5, etc., and the exhaust pipe 7
is introduced into a neutralization device (not shown), neutralized, and discharged into the atmosphere. As a result, the kneaded sand in the cavity is hardened. After the kneaded sand has hardened, compressed air is supplied into the gushing head, penetrates through the hardened kneaded sand, and is discharged into the atmosphere through a neutralization device to clean the hardened kneaded sand, etc.; When the extrusion pin is inserted into the blowing hole 22a to press the hardened kneaded sand downward and the elevating table 5 is lowered by the shortening operation of the cylinder 2, the upper and lower molds 22, 16 are released from the clamped state and at the same time the above-mentioned The lower mold 16 and the like are lowered with the kneaded sand extruded from the upper mold 22 and attached to the lower mold 16. Then cylinder 4
The elongation operation causes the push-out pins 18, 18, etc. to rise and push up the hardened kneaded sand mold from the lower mold 16, thereby completing the entire molding process. In addition, after repeating the above molding process several times, the carriage 14 etc. are advanced by the extension operation of the cylinder 19, and the lower mold 1 is moved forward.
It is also possible to carry out the lower mold 16 from a position directly above the lifting table 5 and to clean the lower mold 16, apply a mold release agent, etc.

In the above embodiment, the side wall 5a is provided at the periphery of the lifting table 5, but the side wall 5a may be omitted by setting the height of the hook member 15 to a desired height. Further, the seal member 6 may be attached to the lower end surface of the hook member 15.

As is clear from the above description, in the present invention, the sealed space provided below the lower mold for collecting the curing gas is configured with a hook member and an elevating table that are separable from each other. By manufacturing the lower mold and hook member as a set, there is no need for tightening bolts between the lower mold and the lifting table, making it possible to replace the mold in a short time. When it is carried out from a position directly above the lifting table via a trolley, the upper part of the lifting table is opened and the lower part of the lower mold is not closed.
This has excellent effects such as making it extremely easy to clean the top of the lifting table and the lower part of the lower mold.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, and FIG. 2 is a partially cutaway right side view of FIG. 1. 5... Elevating table, 14a... Opening, 14...
...Dolly, 15...Hack member, 16...Lower mold.

Claims (1)

[Claims] 1 A frame-shaped sealing member 6 is attached to the upper surface of the lifting table 5 which is connected to the neutralization device and is arranged to be able to rise and fall.
A frame-shaped trolley 14 is equipped with an opening 14a of a required size above the lifting table 5.
is disposed directly above the elevating table 5 so as to be able to be carried in and out, and is mounted on the trolley 14 with the seal member 6 interposed thereon when the elevating table 5 rises, thereby sealing the airtight space. rises to define
In addition, a frame-shaped hook member 15, which is configured to release the sealed space and separate from it when the lifting table 5 is lowered and has a predetermined lower mold 16 mounted on its upper surface, is attached to the opening 14a of the cart 14. A lower mold device for a gas hardening type mold making machine, characterized in that a lower mold device of a gas hardening type mold making machine is installed so as to be able to rise freely through the lower mold device.