JP3125966B2 - Horizontal split gas curing type mold making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for blowing and filling gas-curable molding sand into a mold cavity defined by an upper mold and a lower mold.
The present invention relates to a horizontal split gas-curing mold molding apparatus for curing a molding sand by passing a curing gas through the molding sand.

[0002]

2. Description of the Related Art Conventionally, as a horizontal split gas hardening mold forming apparatus as described above, a gassing frame for blowing a hardening gas is fixedly provided, and the upper and lower molds are pushed up from below and pressed against the gassing frame. In addition, a blow head that blows molding sand and a system that presses down and presses down a gassing lid or the like for closing the upper portion of the gassing frame from above are used because of various advantages due to shortening of the gas piping for gassing. (Japanese Patent Publication No. 1-37219). However, in such an apparatus, the gassing frame fixed to the main body of the mold making apparatus receives a force to bend in one vertical direction. For this reason, not only the gassing frame but also the main body of the mold making apparatus needs to have sufficient rigidity, and there is a problem in cost. Further, the lifting and lowering of the blow head and the gassing lid is performed by using a compression spring and a press-down cylinder. However, when the lifting stroke is long, it is difficult to select a compression spring. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and can reduce the rigidity of a gassing frame and a main body of a molding apparatus without significantly deteriorating the advantages of piping of the gassing frame by the conventional fixed arrangement, and can reduce the compression spring. It is an object of the present invention to provide a horizontal split gas-curing mold molding apparatus having a structure not using a mold.

[0003]

Means for Solving the Problems In order to achieve the above object, a horizontal split gas curing mold molding apparatus according to the present invention comprises a mold supported up and down via a push-up cylinder, and A gashing frame connected to a downward cylinder attached to the fixed frame so as to be able to move up and down, an upper die fixed to a lower part of the gassing frame so as to be able to move up and down, and the fixed frame; A gashing lid with a product pushing mechanism suspended at a lower portion of the gashing frame so as to be reciprocally movable between an upper position of the gassing frame and a standby position and capable of moving up and down within a predetermined range; and a lower portion of the fixed frame. And a blow head suspended so as to be able to reciprocate between an upper position of the gassing frame and a sand charging position and to be able to ascend and descend within a predetermined range, and to the fixed frame. A blowing head which is provided at a position directly above the gassing frame and which can also serve as a stopper for stopping the rise of the gassing lid and the blow head, and which can blow out compressed air. It is.

[0004]

According to the present invention, by adopting the above solution, the gassing frame is moved up and down by using the downward cylinder and the push-up cylinder, and during this elevating movement, the blow head and the gassing lid are moved. The casting gas can be blown into and out of the upper part of the gassing frame to inject molding sand and hardening gas to form a mold. An apparatus in which the rigidity of the gassing frame and its supporting mechanism is greatly reduced can be provided.
The use of special equipment such as a compression spring for raising and lowering the head and the gassing lid can be eliminated.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. A push-up cylinder 2 is supported at the center of the machine base 1 so as to face upward, and a piston rod of the push-up cylinder 2 is provided with a table 3 having an unshown pushing mechanism.
The lower die 4 having an extrusion pin (not shown) is mounted on the table 3. 5.5 at the upper four corners of the machine base 1 (the rear one is not shown)
A fixed frame 6 is provided between the upper two front and rear two of the columns 5.5 so as to protrude in both left and right directions. The fixed frame 6
A mounting member 7.7 is hung on the front and rear outer sides of a lower position corresponding to the lower mold 4 in the above, and a downward cylinder 8.8 is mounted on a lower end portion of the mounting member 7.7.

As shown in FIG. 2, a gas inlet is provided between the distal ends of the piston rods 9.9 of the downward cylinder 8.8, and has an opening 10 penetrating vertically and communicating with the opening 10 on one wall surface. A gassing frame 12 provided with 11 is fixed. A guide tube 1 is provided at the lower end of the mounting member 7.7.
3.13 is provided, and a guide rod 14.14 erected on the upper part of the gassing frame 12 is inserted through the guide cylinder 13.13, and the gassing frame 12 is provided.
To guide you up and down. At the left and right ends of the lower surface of the gassing frame 12, L-shaped mold supports 15.15 are provided.
Are mounted opposite each other and the mold support 15.15
An upper die 16 having a rectangular shape larger than the opening 10 is suspended in the space between the lower die 4 and locked. Also, the gas inlet 11 of the gassing frame 12
Is a hardening gas generator 18 via a bendable rubber tube 17
Is communicated to.

[0007] Rails 19.19 are attached to the front and rear of the lower surface of the fixed frame 6, and between the rails 19.19 via rollers 20.20. .19 is suspended by a driving device (not shown) so as to be movable. The cart 21
As shown in FIG. 2, a guide tube 22.22 oriented in the vertical direction is mounted at an appropriate interval on the left half portion of the guide tube 22. The guide tube 22.22 has a stopper formed at the upper end thereof. A step-shaped bar 23.23 is inserted through the lower end of the bar 23.23.
Is attached and suspended. Further, a guide tube 26.26 which is directed in the up-down direction is attached to the right half of the bogie 21 at an appropriate interval, and a T-shaped guide tube 26.26 having a stopper at the upper end. Of the gassing frame 12 is inserted through the lower end of the stepped rod 27.27.
A gassing lid 28 for closing the upper part of the opening 10 is connected and suspended.

A cylinder 29 is provided in the gassing lid 28.
Is provided, and a stopper member 31 for restricting upward movement is fixed to an upper portion of the gassing lid 28. Also, in the fixed frame 6, the position just above where the cashing lid 28 is moved to the left and the stopper member 31 stops is located at the position just above the blow head 25.
Is moved to the right side and stopped at a position common to the position immediately above where it is stopped.
Is fixedly disposed. Further, in the fixed frame 6, the blow head 2
A sand hopper 35 is fixedly disposed at a position immediately above where the sand hopper 5 is moved to the left and stopped.

FIGS. 1 and 2 show such a construction.
In this state, gas-hardening molding sand is supplied into the blow head 25, and the carriage 21 is driven by a driving device (not shown).
Is moved to the right and the blow head 25 is
And is stopped between the blower head 34 and the camera 12. Next, the push-up cylinder 2 is actuated to raise the lower die 4 to match the upper die 16 as shown in FIG.
Is lifted together with the gassing frame 12 by overcoming the downward force of the downward cylinder 8, the lower end of the blow head 25 enters the gassing frame 12, and the blow nozzle 24 is inserted into a blow port (not shown) of the upper die 16. The blow head 25 is lifted up by continuing to ascend, and the upper end of the blow head 25 is pressed against the lower end of the blow head 34 to stop the ascending operation, and the state shown in FIG. 3 is obtained. Next, the blow-off valve 23 is operated, and the compressed air in the air tank 33 is blown by the blow head 25.
The molding sand supplied and stored therein is blown and filled together with the compressed air into the cavity defined by the upper and lower molds 16.4 through the blow nozzle 24, and the supply of the compressed air is stopped. .

Next, the push-up cylinder 2 operates in reverse, and the elongating action of the downward cylinder 8 causes the blow nozzle 24 of the blow head 25 to come out of the gassing frame 12 with the upper and lower molds 16.4 closed. After lowering and stopping, the drive unit (not shown) operates in reverse to move the carriage 21 to the left, and moves the blow head 25 to the lower part of the sand hopper 35 and the gassing lid 28 to the gassing frame 12.
Stop at the top of the Next, the push-up cylinder 2 is extended again to overcome the lowering force of the downward cylinder 8, and the upper and lower molds 16.4 and the gassing frame 12 are raised and abut against the gassing lid 28 to continue to further rise. The stopper member 31 is pressed against the lower end of the blowing head 34 to stop rising, and the state shown in FIG. 4 is obtained. In this state, the hardening gas generator 18 is operated to supply the hardening gas through the rubber pipe 17 and the gas inlet 11 into the gassing frame 12 whose upper part is closed, and the blowing port (not shown) of the upper die 16. After that, the hardening gas is ventilated (gassing) to harden the molding sand, and the supply of the hardening gas is stopped.

Next, the push-up cylinder 2 is contracted while the cylinder 29 is extended. The hardened molding sand (mold) is pushed from the upper mold 16 by the product extruding mechanism 30 and continues to descend together with the lower mold 4 to separate the gassing lid 28 and the gassing frame 12 as shown in FIG. The lowering of the upper die 16 and the upper die 16 is stopped at the lowering end of the downward cylinder 8. Further, the lower mold 4 is continued to descend, and the mold is separated while the mold is attached to the lower mold 4.
The mold is pushed up by the operation of an unillustrated extrusion pin of the lower mold, carried out of the machine by a known method, and brought into the state of FIG. During this time, molding sand is introduced into the blow head 25 from the sand hopper 35. Hereinafter, the same operation as described above is repeated.

[0012]

According to the present invention, as apparent from the above description, a gassing frame is suspended via a downward cylinder above a lower die which is moved up and down by a push-up cylinder, and a lower portion of the gassing frame is provided. The upper die is locked to the upper surface of the gassing frame, and the blow head and the gassing lid are alternately put in and out above the gassing frame. The advantages of the present invention are that the rigidity of the system and the whole device supporting the system can be greatly reduced, and various effects such as eliminating the need to use a compression spring for raising and lowering the blow head and the gassing lid are advantageous. It is enormous.

[Brief description of the drawings]

FIG. 1 is a front view showing a state before an operation according to an embodiment of the present invention.

FIG. 2 is a cutaway front view of a main part showing a state before operation according to the embodiment of the present invention.

FIG. 3 is a front view, partially cut away, showing a state before casting sand blowing in the embodiment of the present invention.

FIG. 4 is a cutaway front view of a main part showing a state before hardening gas gassing in the embodiment of the present invention.

FIG. 5 is a cutaway front view of a main part showing a gassing lid separated state in the embodiment of the present invention.

[Explanation of symbols]

 2 Push-up cylinder 4 Lower die 6 Fixed frame 8 Downward cylinder 12 Gassing frame 15 Mold support material 16 Upper die 21 Cart 25 Blow head 28 Gassing lid 34 Blowing head

Claims (1)

(57) [Claims] 1. A lower mold 4 supported so as to be able to move up and down via a lifting cylinder 2 and a lower cylinder 8 attached to a fixed frame 6 above the lower mold 4 so as to be able to move up and down. And the upper die 1 movably lifted and locked at the lower part of the gassing frame 12.
And a gashing with a product pushing mechanism suspended below the fixed frame 6 so as to be reciprocally movable between a position above the gassing frame 12 and a standby position and to be able to move up and down within a predetermined range. A lid 28 and the fixed frame
A blow head 2 suspended at a lower portion of the frame 6 so as to be able to reciprocate between a position above the gassing frame 12 and a sand charging position and to be able to ascend and descend within a predetermined range.
5 and the gassing lid 2 provided at a position immediately above the gassing frame 12 in the fixed frame 6.
8 and stopper for stopping the upper part of the blow head 25
Head 34 capable of blowing compressed air
And a horizontal split gas curing type mold making apparatus characterized by comprising: