JPS5841932B2 - Continuous mold manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous mold manufacturing apparatus, and more specifically to a mold manufacturing apparatus that manufactures a mold by blowing gas such as carbon dioxide gas or triethylamine into a mold filled with a cold box method to harden the mold. This relates to continuous molding equipment.

The method of using a special gas such as carbon dioxide gas or triethylamine as a catalyst for a mold curing agent occupies an important position in the mold manufacturing method.

However, when curing a mold using this method, there has been a desire for an apparatus that can be used continuously through repeated operations and that does not emit gas into the surrounding area.

Under these circumstances, the present inventor first developed a hermetically sealed curing chamber using a formwork station provided on the frame so as to be movable up and down, and a bottomless box facing the formwork station and fixed to the top plate of the frame. A gas blowing head is attached to the tip of a gas blowing pipe that penetrates from the top plate of the frame into the box, and the gas blowing head is tightly fitted to the gas blowing hole of the gas plate placed on the formwork. (For example, Patent No. 730599 (Japanese Patent Publication No. 48-3)
(See Publication No. 8290).

The present invention is a further improvement of the above-mentioned device, and its operability is improved so that it can be used efficiently.

That is, in the present invention, a sealed chamber is formed by a formwork station provided on a frame so as to be movable up and down and a bottomless box mounted on the top of the frame opposite to the formwork station, and the box In a mold continuous molding device that has a gas outlet on the side surface of the box and a gas blowing pipe that passes through the top plate of the box, the gas is used to blow gas into the formwork placed on the formwork station. A plate is provided between the formwork station and the upper plate of the box so as to be movable up and down, and a sealing mechanism is attached to the gas plate for tightly fitting the gas blowing hole of the gas plate to the lower end of the gas blowing pipe. It is characterized by this.

The present invention will be described below with reference to specific examples shown in the drawings.

FIG. 1 is a longitudinal sectional front view of the device of the present invention, FIGS. 2 and 3 are views showing the gas plate used in the device of the present invention, and FIGS. 4 and 5 show the gas plate installation. It is a figure showing an auxiliary board of.

FIG. 6 is a partially cutaway front view of the apparatus during gas blowing work.

In the drawing, 1 is a table, a pneumatic cylinder 2 is attached to the lower center of the table 1, and its piston rod 3 passes through the center of the table 1 and moves up and down, and a formwork station plate is attached to the upper end of the piston rod 3. 4 is provided.

On the other hand, a bottomless box 6 is attached to the top of the frame 5 fixed to the table 1, and a gas exhaust pipe 7 is attached to the side of the box 6.
On the other hand, a gas blowing pipe 9 is provided on the upper plate of the box 6 and is moved up and down through the upper plate by a pneumatic cylinder 8.

Further, on the upper plate of the box 6, an auxiliary plate 10 for attaching a gas plate 16, which will be described later, is suspended by rods 11 and 11' so that it can be raised and lowered. 12 and 12' are provided.

The auxiliary plate 10 has a hole 13 in the center that penetrates vertically, and a sealing material 14,
15 are provided respectively, and the upper surface can be tightly fitted with the lower end of the gas blowing pipe 9.

A gas plate 16 is attached to the lower surface of the auxiliary plate 10 with a sealing material 15 interposed therebetween by a plurality of bolts 17, and the holes 13 of the auxiliary plate 10 and the gas blowing holes 18 of the gas plate are brought into tight contact.

As shown in FIGS. 2 and 3, the gas plate 16 has a plurality of guide grooves 19 radially provided on its lower surface, which communicate with the central gas blowing hole 18.

A method of forming a mold by hardening a mold in a mold frame using this device will be described below.

As shown in FIG. 1, a molded mold 20 is placed on the station plate 4.

Next, when the station plate 4 is raised by the cylinder 2 as shown by the arrow, the upper surface of the formwork 16 is joined to the gas plate 16, and then the gas plate 16 and the auxiliary plate 10 are pushed up.

The station plate 4 further rises, and when its upper surface periphery hits the sealing material 21 at the lower end of the bottomless box 6 and stops, the box 6 and the station plate 4 form a sealed chamber.

When the sealed chamber is thus formed, the gas blowing pipe 9 is lowered by the action of the pneumatic cylinder 8 provided at the top of the box 6, and the lower end 9' of the blowing pipe comes into contact with the sealing material 14 of the auxiliary plate 10. Then, the lower end 9' of the gas blowing pipe and the hole 13 of the auxiliary plate are brought into close contact with each other, resulting in the state shown in FIG.

When the two operations of forming the airtight box described above and sealing the lower end of the gas blowing pipe and the gas blowing hole of the gas plate through the auxiliary plate are completed, a gas generator (not shown) installed externally is then installed. ), as shown by the arrow in FIG.
The guide groove 19 passes through the central hole 18 of the gas plate 16.
It is diffused through the process and supplied to the molding sand in the flask 20.

Excess gas that did not act on the hardening of the sand is removed from the formwork 20.
The gas diffuses into the sealed chamber through the gap 23 between the station plate 4 and the formwork 20 created by the protruding member 22 provided at the bottom of the gas discharge pipe 7, and is discharged to a gas processing device such as an adsorption device (not shown). It is processed, rendered harmless and dissipated.

When the molding sand is hardened by the gas and the mold is manufactured in this way, the gas supply is stopped, and then the gas blowing pipe 9
More air is pumped in to exhaust any gas remaining in the sealed chamber.

After exhausting the gas, the air supply is also stopped, the gas blowing pipe 9 is pulled up by the cylinder 8, and the cylinder 2
The station plate 4 is lowered to return to the state shown in FIG. 1, and the desired mold is taken out.

In the apparatus of the present invention, the gas plate is vertically movably provided between the station plate and the top plate of the bottomless box, and the sealing mechanism for tightly fitting the gas blowing hole of the gas plate to the lower end of the gas blowing pipe includes: As shown in the figure, it is desirable to provide the auxiliary plate 10 to which the gas plate 16 is detachably attached, but the present invention is not limited thereto.

For example, the gas plate 16 may be suspended directly from the upper plate of the box 6, and a sealing material may be provided on the upper surface of the gas blowing hole 18 of the gas plate so that the gas plate 16 is directly fitted to the lower end 9' of the gas blowing pipe 9. .

However, it is particularly preferable to provide an auxiliary plate as shown in the drawings, since gas plates of various sizes can be quickly and easily replaced when molds of various types and small quantities are manufactured.

Since the apparatus of the present invention has the above-described structure, it does not emit harmful gases to the outside when manufacturing molds by hardening molding sand using gases such as carbon dioxide gas and triethylamine. It can be implemented.

In addition, when mass producing the same mold, the operator only needs to place the filled mold on the mold station plate, and then place the gas plate on top of the mold as in the case of conventional machines. The work becomes more efficient as there is no need to remove it when the work is completed.

In addition, there is no fear of forgetting to place the gas plate on the formwork and operating the machine, resulting in defective products being produced.

Furthermore, even when the dimensions of the formwork change, the gas plate can be quickly and easily replaced as described above.

Furthermore, according to the device of the present invention, the operator can see the gas plate 16 suspended below the box 6 as shown in FIG. , the formwork 20 and the gas plate 16 as shown in FIG.
are accurately joined.

Naturally, the gas blowing pipe 9 and the gas blowing hole 18 of the gas plate are precisely aligned, so that correct work is always performed.

However, in the conventional machine, the gas plate is not suspended like in the present invention, and when the operator places the separated and independent gas plate on the formwork and then places the formwork on the station plate. However, in the present invention, it is difficult to find the correct position, and the lower end of the gas blowing pipe and the gas blowing hole of the gas plate do not match, resulting in the possibility that the gas will not be properly blown into the formwork. No failures occur at all.

In short, the device of the present invention has superior functions compared to conventional devices, such as good operability and high efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a specific example of the present invention, and FIG.
3 and 3 are diagrams showing specific examples of the gas plate used in the present invention, and FIGS. 4 and 5 are diagrams showing specific examples of the auxiliary plate for attaching the gas spray (9). FIG. 6 is a diagram showing the situation during gas injection. 1...Table, 2,8...Pneumatic cylinder, 5...Frame, 6...Bottomless box, 7... Gas exhaust pipe, 9...Gas blowing pipe, 10...Auxiliary plate for gas plate installation, 16...Gas plate.

Claims (1)

[Claims] 1 A sealed chamber is formed by a formwork station provided on the frame so as to be movable up and down and a bottomless box attached to the top of the frame opposite to the formwork station, and In a mold continuous molding device in which a gas outlet is provided through the upper plate of the box and a gas blowing pipe is provided, the gas plate for blowing gas into the mold placed on the mold station is installed as described above. A sealing mechanism is provided between the formwork station and the upper plate of the box so as to be movable up and down, and the gas plate is provided with a sealing mechanism for tightly fitting the gas blowing hole of the gas plate to the lower end of the gas blowing pipe. Continuous molding equipment for molds.