JP2000238029A - Method and device for releasing molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for releasing a molded body, with which the molded body such as a suspension insulator or the like can be surely released from a mold without deforming the molded body. SOLUTION: At the releasing of a molded body such as a suspension insulator or the like from a porous mold 1, under the state that a caul 5 is arranged at a slight interval above a molded body W, air is blown in the mold so as to float the molded body. The amount of flotation is limited by the caul 5. Next, the molded body W is brought back in the mold by stopping the air blowing. By lowering a suction plate, the molded body W is attached to the suction plate. The molded body W is taken out under rotation together with the suction plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for releasing a molded article made of ceramic having a complicated shape such as a suspension insulator from a mold.

[0002]

2. Description of the Related Art A ceramic molded body having a complicated shape such as a suspension insulator is molded by a porous mold described in Japanese Patent No. 1786207 and Japanese Patent No. 2736004. If such a mold is used, the raw material clay can be brought into close contact with the surface of the mold by applying a negative pressure to the mold to form a precise shape. When releasing the molded product, the suction plate 2 is lowered toward the molded product W in the molding die 1 as shown in FIG. It had been.
At this time, air blowing of pressurized air is performed from the mold 1,
The molding W is lifted from the molding die 1.

However, in the conventional method in which the compact W is lifted by the air blow in a state where the compact W is sucked by the suction plate 2 as described above, the compact W may not be evenly lifted from the molding die 1 in some cases. When 2 was raised, mold release was sometimes impossible due to insufficient adsorption. For this reason, when the vacuum pressure of the suction plate 2 is increased to reliably suck the compact W, the ribs of the compact W may be deformed inward. In addition, even if the suction is reliably performed, the compact W
Insufficient lifting from the mold 1 may cause the molded body W to be stretched upward and deformed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and to provide a method and an apparatus for releasing a molded product from which a molded product can be reliably removed from a molding die without deforming the molded product. It was done in.

[0005]

In order to solve the above-mentioned problems, a method for releasing a molded article according to the present invention comprises the steps of first releasing a ceramic molded article from a molding die, After placing the backing plate, perform air blow from the mold to lift the molded body, then stop air blowing and return the molded body to the mold, and then lower the suction plate to adsorb the molded body, And removing the molded body while rotating the molded body. In addition, the molded product release apparatus of the present invention includes, on an upper portion of a porous molding die capable of air blowing of a molded product, a contact plate for restricting an amount of lifting of the molded product from the molding die by air blowing, and once lifting by air blowing. And a suction plate that can rotate and ascend and descend to suck the compact after the molding.

According to the present invention, the molded body can be reliably once lifted off the mold by air blow prior to the mold release by the suction plate. In addition, since the lift amount is limited by the backing plate, the molded body does not jump out of the molding die. The molded body once lifted up from the molding die is returned to the molding die by stopping the air blow. However, since the molded body is merely in contact with the molding die without being in close contact with the molding die, it can be easily taken out by the suction plate. Moreover, since the suction plate is taken out while rotating, the molded body can be taken out without deforming.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. In FIG. 1, reference numeral 1 denotes a porous mold similar to the conventional one. For example, a porous plaster mold in which a ventilation tube or the like is embedded and air blow and vacuum can be used can be used. The clay as a raw material is pressure-formed by the molding die 1 and a pressing die (not shown) to form a ceramic molded body W as shown. The illustrated molded body W is a suspension insulator having a plurality of annular ribs 4 around a central head 3. Such forming is performed continuously by a known rotary table type press forming machine. As described above, in the final stage of molding, the molding die 1 is set to a negative pressure, and the raw material clay is brought into close contact with the surface of the molding die 1 so that it can be formed into an accurate shape.

In the case of a rotary table type molding machine, a molding die 1
Comes to the station just before the removal station, the contact plate 5 descends to the upper part of the mold 1.
The abutment plate 5 is stopped about 1 to 2 mm above the upper end of the molding W, and in this state, air blowing is performed by injecting high-pressure air from the inside of the molding die 1 to lift the molding from the molding die 1. As a result, the compact W rises from the mold 1, but its amount is limited by the backing plate 5. The backing plate 5 has a surface shape corresponding to the formed body W.

Next, the air blow is stopped, and at the same time, the molding W returns to the inside of the molding die 1, but comes into contact with the molding die 1 without adhering to the molding die 1. Thereafter, the backing plate 5 moves up and away from the compact W, and the mold 1 moves to the removal station. As shown in FIG. 2, the suction plate 2 is installed at this position as in the related art, and descends above the compact W. Note that the molded body W once floated up from the molding die 1 by air blowing at the previous station, so that the molded body W is simply kept in contact with the molding die 1 even when moved to the take-out station. Therefore, if the suction plate 2 is moved down to a position where the suction plate 2 is in contact with the formed body W and suction is performed, the formed body W can be reliably sucked. Also at this time, it is preferable to perform air blowing from the molding die 1 to lift the molded body W to further ensure the suction.

The suction plate 2 rises while adsorbing the compact W, but at this time, rises while rotating slowly. For this reason, the compact W is successfully separated from the mold 1 and taken out on a conveyor or the like. As described above, in the present invention, since the molded body W is taken out while rotating, the contact surface between the molded body W and the molding die 1 needs to be a rotating body symmetrical about the central axis.

[0011]

As described above, according to the present invention, the compact W is once lifted up from the mold, and is then taken out while rotating while being sucked by the suction plate.
The mold can be reliably released without exerting an excessive force on the mold. Therefore, there is no possibility of taking out errors as in the prior art, and it is not necessary to apply an excessive suction pressure. Can be.

The present invention can be widely applied to mold release of various ceramic molded bodies other than the suspension insulator. Needless to say, the present invention can be applied to molding machines other than the rotary table type molding machine.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a lifting step in the present invention.

FIG. 2 is an explanatory view showing an adsorption step in the present invention.

FIG. 3 is an explanatory view showing a conventional method.

[Explanation of symbols]

1 Mold, 2 suction plate, 3 heads, 4 annular ribs, 5
Patch

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Claims (2)

[Claims] 1. In releasing a ceramic molded body from a molding die, first, a contact plate is placed on the upper part of the molded body, air blowing is performed from the molding die to lift the molded body, and then air blowing is stopped. And returning the molded body to a molding die, lowering the suction plate to adsorb the molded body, and removing the molded body while rotating the molded body together with the suction plate. 2. A pressing plate for limiting the amount of the molded body floating from the molding die by air blowing, and a molded body once lifted by air blowing is adsorbed on an upper portion of a porous molding die capable of air blowing the molded body. A mold release device for a molded article, comprising a rotating and vertically movable suction plate.