JP4529836B2 - Mold release method and release device for molded products for ceramic products - Google Patents

Description

  The present invention relates to a method for releasing a molded product for a ceramic product and a device for releasing the same.

An invention described in Japanese Patent Application Laid-Open No. 61-270110 (Patent Document 1) is known as a mold release method and a mold release apparatus for this type of molded product.
The present invention relates to a method and an apparatus for releasing a molded product formed by a roller machine from a gypsum mold.

  In this background art, the middle mold corresponding to the inner surface shape of the molded product is positioned in close contact with the inner surface of the molded product in the gypsum mold, and the ventilation formed in the gypsum mold with the molded product held between the gypsum mold and the middle mold. Compressed air is ejected through the passage to the molding surface, and an air film is formed between the gypsum mold and the outer surface of the molded product, so that the molded product is separated from the gypsum mold, and then opened to the outer periphery of the middle mold. A method and apparatus have been described in which a suction action is applied to a molded product through the suction holes, the molded product is adsorbed and held on the outer peripheral surface of the middle mold, and the molded product is released from the gypsum mold.

  And since the background art is the above-mentioned configuration, when the molded product is lifted from the gypsum mold by the action of the compressed air, the molded product is held from the inner surface direction by the middle mold. In addition to being able to prevent deformation and sufficiently supporting the release of thin molded products by roller machine molding, the molded products can be adsorbed by adsorbing the molded products through the suction holes opened in the outer periphery of the middle mold following the air film. Since the mold is released from the gypsum mold, it does not take a long time compared to the conventional mold release method using the water absorption action of the gypsum mold, and the molded product immediately after molding can be easily deformed. It is described that there is an advantage that adsorption / release can be performed.

JP-A 61-270110

  The problem to be solved is that a reticulated air supply pipe is embedded in the entire area of the gypsum mold to form a ventilation path. By releasing compressed air to the molding surface through the ventilation path, the molded product is released. Although it can be evaluated in terms of improving the property, there is a possibility that the plaster mold having a problem in strength due to the material may be further weakened due to the structure in which the air passage is formed.

In addition, the middle mold corresponding to the inner surface shape of each molded product is placed in close contact with the inner surface of the molded product in the gypsum mold so that the molded product is sucked through the suction holes of the middle mold, and the molded product is released. Therefore, it was necessary to produce a medium mold corresponding to each type of molded product with different types and inner surface shapes and to replace it.

In addition, as is known for molded products for ceramic products, in particular, shrinkage due to drying cannot be avoided. Therefore, although the shape of the inner surface is small for each molded product, it cannot be unified due to shrinkage differences. .
As a result, it must be said that producing a middle mold corresponding to the inner shape of a molded product whose inner surface shape is not uniform is not easy as described in the background art, and lacks reality.
Therefore, there is a possibility that it is not practical to place the middle mold in close contact with the inner surface of the molded product as the background art explains.

  Moreover, the environment in which the compressed air is injected through the gypsum mold onto the molding surface is not necessarily hermetically sealed.In addition, as described above, when the molded product is sucked through the suction holes of the middle mold, As a result of non-unification, there is a possibility that the middle mold cannot be brought into close contact with the inner surface of the molded product, and there is a possibility that the completeness of the suction action cannot be expected.

An object of the present invention is to provide a mold release method and apparatus for improving the mold releasability of a molded product by adopting a conventional gypsum mold as it is without weakening the strength of the gypsum mold.
Another object is to eliminate the complexity of mold release of the molded product and to rationally evaporate water in the gypsum mold and the molded product.

In order to achieve the above object, the first problem solving means is:
In the method of releasing the molded product from the gypsum mold, which is molded by an inner trowel, has a concave portion on the inside, and the upper portion of the concave portion is opened and dried.
A step of bringing a control cylinder of a lower air control mechanism into contact with the lower side of the gypsum mold so as to form a sealed gypsum mold side air chamber around the lower side of the gypsum mold;
On the other hand, the step of closing the open side of the concave portion of the molded product with the control lid of the upper air control mechanism so as to form the concave portion of the molded product as an air intake chamber on the molded product side in a sealed state,
Supplying compressed air to the air chamber on the plaster mold side in a sealed state;
And a step of supplying air to the air intake chamber on the molded product side in a sealed state.

In order to achieve the above object, the second problem solving means is:
In the method of releasing the molded product, which has been molded by an outer trowel and dried, from the gypsum mold, the gypsum mold is formed so that the periphery of the lower side of the gypsum mold is formed as a sealed gypsum mold side air chamber. A step of bringing the control cylinder of the lower air control mechanism into contact with the lower side, and on the other hand, providing a certain space outside the molded product so that the outside of the molded product is formed as an air intake chamber on the molded product side in a sealed state The step of closing the upper side of the gypsum mold by the control lid of the upper air control mechanism, the step of supplying compressed air to the air chamber on the gypsum mold side in a sealed state,
And a step of supplying air to the air intake chamber on the molded product side in a sealed state.

In order to achieve the above object, the third problem solving means is:
In an apparatus for releasing a molded product from a gypsum mold for molding with an inner trowel,
A gypsum mold with an engagement part provided around the body part, connected to the compressed air supply means, and a liftable lower air control mechanism with a control cylinder and an intake means, and an elevator with a control lid It consists of a flexible upper air control mechanism,
The lower air control mechanism is provided below the plaster mold, and the upper air control mechanism is provided above the plaster mold,
The lower air control mechanism is raised, and the control cylinder is brought into contact with the engaging portion of the gypsum mold so that the lower side of the gypsum mold is formed as a sealed gypsum mold side air chamber,
On the other hand, the upper air control mechanism is lowered and the opening edge of the molded product in the gypsum mold is closed by the control lid, so that the concave portion of the molded product is formed as an air intake chamber on the molded product side in a sealed state. It is characterized by.

In order to achieve the above object, the fourth problem solving means is:
In an apparatus for releasing a molded product from a gypsum mold for molding with an outer trowel,
Lower and lower air that is movable up and down with a control cylinder connected to a gypsum mold and a compressed air supply means provided with a lower side engaging part and an upper side engaging part near the lower part and upper part around the body part, respectively. Consists of an upper air control mechanism that is connected to the control mechanism and the intake means and that can move up and down with a control lid,
The lower air control mechanism is provided below the plaster mold, and the upper air control mechanism is provided above the lower air control mechanism,
The lower air control mechanism is raised and the control cylinder is brought into contact with the engaging portion on the lower side of the gypsum mold, thereby forming the gypsum mold side air chamber around the lower side of the gypsum mold. And
On the other hand, the upper air control mechanism is lowered, and the control lid is provided with a certain space on the outer side of the molded product and is brought into contact with the engaging portion on the upper side of the plaster mold, thereby sealing the outer side of the molded product. It is characterized by being formed as an intake chamber on the molded product side.

Since the first problem-solving means of the present invention is configured as described above, the following operational effects can be obtained.
When the molded product is released from the gypsum mold, both the air chamber on the gypsum side and the intake chamber on the molded product side are in a sealed atmosphere, and the former is supplied with compressed air to the gypsum mold and the latter is inhaled. Therefore, the certainty of vacuum suction can be expected.
Therefore, an air layer is formed between the inner surface of the gypsum mold and the outer peripheral surface of the molded product through the fine pores provided in the physical properties of the gypsum mold without actively forming a ventilation path unlike the gypsum mold of the background art. Since it can be formed, the conventional gypsum mold can be used as it is without weakening the strength of the gypsum mold to improve the releasability of the molded product.

  Compared to the background technology, which requires the preparation of a middle mold for each molded product with different types and shapes of inner parts, it eliminates the need to produce a middle mold and replace the middle mold.

  Further, as described above, since the vacuum suction is performed in a state where the air chamber and the intake chamber are hermetically sealed, it is expected to improve the evaporation of moisture remaining in the gypsum mold or the molded product.

Since the second problem-solving means of the present invention has the above-described configuration, the following effects can be obtained.
The second problem solving means supplies compressed air to the air chamber on the gypsum side in a sealed state, although there is a difference in that the molded product is formed by an outer trowel compared to the first problem solving means. Since the process of applying intake air to the intake chamber on the side of the molded product in the sealed state is basically common, the effect obtained by the first problem solving means can be expected.

Since the third problem-solving means of the present invention is configured as described above, the following operational effects can be obtained.
By raising the lower air control mechanism, a sealed gypsum side air chamber is formed around the lower side of the gypsum mold, and on the other hand, by lowering the upper air control mechanism,
The concave portion of the molded product can be formed as an intake chamber on the molded product side in a sealed state.
Therefore, compressed air is supplied to the air chamber on the gypsum side through the compressed air supply means, and intake air is supplied to the intake chamber on the molded product side through the intake means, so that the gypsum mold has inherent physical properties. Compressed air can be supplied to the molded product through a closed air chamber through fine pores, and intake can be performed from the molded product in parallel. Release can be performed.

Since the fourth problem-solving means of the present invention is configured as described above, the following operational effects can be obtained.
The fourth problem solving means supplies compressed air to the air chamber on the gypsum side in a sealed state, although there is a difference in that the molded product is molded by an outer trowel compared to the third problem solving means. Since it is basically the same in that intake air is applied to the intake chamber on the side of the molded product in a sealed state, it is possible to expect the operational effects exhibited by the third problem solving means.

  For the purpose of improving the releasability of the molded product by adopting the conventional gypsum mold as it is without weakening the gypsum mold, a sealed air chamber is formed around the lower side of the gypsum mold, On the other hand, the recessed part of the molded product is made into a sealed intake chamber, compressed air is supplied to the sealed air chamber around the lower side of the gypsum mold, and air is sucked into the sealed intake chamber formed in the recessed part of the molded product It was realized by applying.

The invention of the method for releasing the molded article from the gypsum mold according to the embodiment of the present invention will be described below with reference to FIGS. 1 and 2 together with the invention of the apparatus.
In this example, an inner iron that is not shown in the figure is formed to leave some moisture, but basically, for example, a concave portion W1 is formed inside like a vase that has been dried through a drying chamber as known, for example. It is an example of a method and apparatus 10 for releasing a molded product W provided from a plaster mold 12.

  A circular support ring 14 that supports the periphery of the body of the plaster mold 12 is provided so as to be known, and a lower air control mechanism 16 that can be raised and lowered is provided below the plaster mold 12 (see FIGS. 1 and 2). reference).

  On the other hand, an upper air control mechanism 18 that can be raised and lowered is provided above the plaster mold 12 (see FIGS. 1 and 2).

Therefore, in more detail, a step-like engagement portion 12 a is formed around the body portion of the plaster mold 12.
The engaging portion 12a raises and lowers the gypsum mold 12 when the opening edge 16a of the cylindrical control cylinder 16A on the gypsum mold side of the lower air control mechanism 16 to be described later is brought into contact. When the opening edge 16a is in close contact with the engaging portion 12a, the gypsum die 12 is surrounded by the periphery of the gypsum die 12 so as to surround the gypsum die 12 and the control cylinder 16A. The purpose is to form a sealed gypsum mold side air chamber 20 by the inner side surface (see FIG. 2).

This gypsum mold 12 has a configuration other than the above-described configuration of the engaging portion 12a, and the other configuration is a conventionally known configuration. As is known, it is made of calcium sulfate and is a prototype for producing ceramics.
It is important to note that the present invention presupposes that it has countless fine pores due to its physical properties and has a function of passing air and moisture.

The lower air control mechanism 16 is provided to be movable up and down.
A cylindrical control cylinder 16A is provided on the bottom side of the plaster mold 12, and a rod 16b is suspended below the control cylinder 16A so that the control cylinder 16A can be moved up and down. 16c is provided continuously.
Thus, the cylindrical control cylinder 16A constituting the main part of the lower air control mechanism 16 is configured to follow up and down of the cylinder 16c and to move up and down via the rod 16b.

  Further, an air hose 16e is connected to the lower side of the control cylinder 16A so that compressed air can be introduced into the control cylinder 16A through an air inlet 16d provided at the bottom of the control cylinder 16A. Although not shown in the figure, compressed air supply means such as an air compressor capable of supplying compressed air is continuously provided.

  In this specification, the term “control cylinder” is used, but it means a hollow body having a bottom and an open top.

With the configuration of the lower air control mechanism 16, the control cylinder 16A is raised through the rod 16b as the cylinder 16c is raised.
Then, the opening edge 16a of the control cylinder 16A is in close contact with the gypsum-type engaging portion 12a, so that the function and purpose of the gypsum mold 12 are followed between the outer surface of the body part and the inner surface of the control cylinder 16A. An air chamber 20 on the gypsum mold side in a sealed state is formed (see FIG. 2).

  The lower air control mechanism 16 is supported by a mounting base 22, and the mounting base 22 is fixed to a base frame 24 a below a U-shaped support frame 24.

Next, the upper air control mechanism 18 provided above the plaster mold 12 will be described.
The upper air control mechanism 18 closes the opening edge W2 of the recessed portion W1 in which the upper portion of the molded product W in the gypsum mold 12 is opened, thereby sucking the intake air on the molded product side sealed in the recessed portion W1 of the molded product W. The purpose is to form the chamber 30 and to make the control lid 18A for closing and closing the opening edge W2 and the like freely movable.

  Above the control lid 18A, a cylinder 18c is provided up and down via a rod 18b, and an upper air control mechanism 18 having the control lid 18A as a main part is provided up and down.

Since the control lid 18A is intended to close the opening edge W2 of the recess W1 of the molded product W, it is not limited to the concave shape as shown in the figure.
What is necessary is only to have a function that allows the molded product side intake chamber 30 to be sealed when the opening edge W2 is closed by the control lid 18A.

  Further, an air hose 18e is connected to the upper side of the control lid 18A so that air can be sucked into the intake chamber 30 through an air inlet 18d provided on the ceiling of the control lid 18A. Although not shown in FIG. 18e, intake means such as an air pump is continuously provided.

With the configuration of the upper air control mechanism 18 described above, the control lid 18A is lowered via the rod 18b as the cylinder 18c is lowered.
Then, the control lid 18A is lowered, and the opening edge W2 of the molded product W in the gypsum mold 12 is closed, whereby the molded product side intake chamber 30 can be obtained (see FIG. 2).

  The upper air control mechanism 18 is fixed to a base frame 24 b above the support frame 24.

Therefore, according to the molded product release apparatus 10 described above, when the molded product W is released from the gypsum mold 12, the air chamber 20 on the gypsum mold side and the intake chamber 30 on the molded product side are both sealed. Can be set.
Since compressed air is supplied to the air chamber 20 on the plaster mold side and the intake chamber 30 on the molded product side is inhaled, the air of the air chamber 20 → the plaster mold 12 → the molded product W → the intake chamber 30 → the outside. The certainty of the distribution or discharge of can be expected.

  Accordingly, the gypsum mold 12 has fine physical properties provided on the physical properties of the gypsum mold 12 without actively forming an air passage unlike the gypsum mold of the background art and without applying the middle mold to the inner surface of the molded product W. Since an air layer can be formed between the inner surface of the gypsum mold 12 and the outer peripheral surface of the molded product W, the conventional gypsum mold can be used as it is without weakening the strength of the gypsum mold 12, and the releasability of the molded product. Can be improved.

Hereinafter, an invention of a method for releasing a molded product from a gypsum mold according to an embodiment of the present invention will be described with reference to FIG.
In this example, a molded product W such as a bowl is basically formed, for example, in the form of a bowl, although it is formed by a trowel not shown and leaves some moisture. 2 is an example of a method and an apparatus 10 for releasing a mold from a plaster mold 12.

  The second embodiment is different from the first embodiment in that it is molded by a trowel, the gypsum mold 12 is a form for molding by a trowel, and in the essence of the invention, a method of releasing the mold. Since there is no change in the apparatus, the description of Example 1 is used and the description is omitted unless otherwise noted.

A lower-side engaging portion 12a and an upper-side engaging portion 12f are provided at positions near the lower portion and the upper portion around the body portion of the plaster 12, respectively.
A lower air control mechanism 16 that can be moved up and down with respect to the gypsum mold 12 is provided, and an upper air control mechanism 18 that can be moved up and down is provided in the same manner as in the first embodiment.
And both 16 and 18 are being fixed by the base frame 24b of the upper part of the support frame 24, and the base frame 24a of the lower part similarly to Example 1, respectively.

As for the plaster mold 12, as is known, it is in the form of a trowel.
A lower-side engaging portion 12a and an upper-side engaging portion 12f are provided at positions near the lower portion and the upper portion around the body portion of the plaster mold 12, respectively.

Therefore, the operation of this embodiment and the mold release method will be described together below.
The molded product W molded by the outer trowel is covered so as to cover the outer peripheral surface of the plaster mold 12 as is known.
By raising the lower air control mechanism 16 and bringing the opening edge 16a of the control cylinder 16A into contact with the lower engaging portion 12a of the gypsum mold 12, the bottom of the gypsum mold 12 and the inner surface of the control cylinder 16A are sealed. A gypsum mold side air chamber 20 is formed.

On the other hand, the upper air control mechanism 18 is lowered to bring the opening edge 18a of the control lid 18A into contact with the upper engaging portion 12f of the plaster mold 12, so that the upper side of the plaster mold 12 and the inner surface of the control lid 18A are sealed. The molded product side intake chamber 30 is formed.
In this case, it goes without saying that a fixed space for forming the intake chamber 30 is set on the inner surface of the control lid 18A and the outer side of the molded product W.

Accordingly, the air compressor of the lower air control mechanism 16 supplies compressed air from the air inlet 16d of the control cylinder 16A to the gypsum mold side air chamber 20 through the air hose 16e.
On the other hand, the air hose 18e connected to the air pump of the upper air control mechanism 18 sucks the gypsum mold-side intake chamber 30 through the air introduction port 18d of the control lid 18A.

Thus, the compressed air supplied to the air chamber 20 on the gypsum mold side forcibly penetrates between the outer peripheral surface of the gypsum mold 12 and the inner peripheral surface of the molded product W through countless fine pores in the gypsum mold 12. However, since this compressed air is vacuum-sucked from the intake chamber 30 on the molded product side, it is easier to circulate from the air chamber 20 on the plaster mold side toward the intake chamber 30 on the molded product side.

  As a result, an air layer can be reliably formed between the outer peripheral surface of the plaster mold 12 and the inner peripheral surface of the molded product W.

  Further, since the compressed air is supplied to the air chamber 20 on the sealed gypsum mold side and is sucked through the gypsum mold 12 to the intake chamber 30 on the molded article side in the sealed state, the flow of the compressed air is smoothly performed. It can be expected that water remaining in the plaster mold 12 and the molded product W is forcibly evaporated.

  In the first and second embodiments, the lower air control mechanism 16 operates to form the gypsum mold side air chamber 20 first, and the upper air control mechanism 18 operates to move the molded product side intake chamber 30 later. As described above, the upper air control mechanism 18 is actuated first to form the molded product side intake chamber 30 first, and the lower air control mechanism 16 is actuated later to thereby form the gypsum mold side air chamber. 20 may be formed.

What is necessary is to provide a sealed gypsum mold side air chamber 20 and a sealed molded article side intake chamber 30 above and below the gypsum mold 12, and the order thereof does not matter.
The order before and after the step of supplying compressed air to the air chamber 20 on the plaster mold side and the step of supplying air to the intake chamber 30 on the molded product side are not limited.
Theoretically, it is conceivable to carry out both processes without time lag.

The side view before mold release of the molded product which showed the principal part which concerns on the Example of the mold release apparatus of the molded product for ceramic products by the cross section. Example 1 The side view at the time of mold release of the molded article which showed the principal part which concerns on the Example of the mold release apparatus of the molded article for ceramic products by the cross section. Example 1 The side view at the time of mold release of the molded article which showed the principal part which concerns on the other Example of the mold release apparatus of the molded article for ceramic products by the cross section. (Example 2)

Explanation of sign

DESCRIPTION OF SYMBOLS 10 Mold release apparatus for ceramic products 12 Plaster mold 12a Placing mold engaging portion, lower engaging portion 12f upper engaging portion 14 support ring 16 lower air control mechanism 16A control cylinder 16a opening edge of control cylinder 16b Rod 16c Cylinder 16d Air inlet 16e Air hose 18 Upper air control mechanism 18A Control lid 18a Control lid opening edge 18b Rod 18c Cylinder 18d Air inlet 18e Air hose 20 Gypsum mold side air chamber 22 Mounting base 24 Support frame 24a Lower base frame 24b Upper base frame 30 Intake chamber on the molded product side W Molded product W1 Molded product recess W2 Molded product recess opening edge

Claims (4)

In the method of releasing the molded product from the gypsum mold, which is molded by an inner trowel, has a concave portion on the inside, and the upper portion of the concave portion is opened and dried.
A step of bringing a control cylinder of a lower air control mechanism into contact with the lower side of the gypsum mold so as to form a sealed gypsum mold side air chamber around the lower side of the gypsum mold;
On the other hand, the step of closing the open side of the concave portion of the molded product with the control lid of the upper air control mechanism so as to form the concave portion of the molded product as an air intake chamber on the molded product side in a sealed state,
Supplying compressed air to the air chamber on the plaster mold side in a sealed state;
A method for releasing a molded product for a ceramic product, comprising the step of supplying air to an air intake chamber on the molded product side in a sealed state. In a method of releasing the molded product molded by an outer trowel and dried from a plaster mold,
A step of bringing a control cylinder of a lower air control mechanism into contact with the lower side of the gypsum mold so as to form a sealed gypsum mold side air chamber around the lower side of the gypsum mold;
On the other hand, a fixed space is provided on the outside of the molded product so that the outside of the molded product is formed as an air intake chamber on the molded product side in a sealed state, and the upper air control mechanism has a control lid to surround the upper side of the gypsum mold. Occluding the step,
Supplying compressed air to the air chamber on the plaster mold side in a sealed state;
A method for releasing a molded product for a ceramic product, comprising the step of supplying air to an air intake chamber on the molded product side in a sealed state. In an apparatus for releasing a molded product from a gypsum mold for molding with an inner trowel,
A gypsum mold with an engagement part provided around the body part, connected to the compressed air supply means, and a liftable lower air control mechanism with a control cylinder and an intake means, and an elevator with a control lid It consists of a flexible upper air control mechanism,
The lower air control mechanism is provided below the plaster mold, and the upper air control mechanism is provided above the plaster mold,
The lower air control mechanism is raised, and the control cylinder is brought into contact with the engaging portion of the gypsum mold so that the lower side of the gypsum mold is formed as an air chamber on the gypsum mold side in a sealed state,
On the other hand, the upper air control mechanism is lowered, and the opening edge of the molded product in the gypsum mold is closed by the control lid, so that the concave portion of the molded product is formed as an intake chamber on the molded product side in a sealed state. A mold release device for molded products for ceramic products. In an apparatus for releasing a molded product from a gypsum mold for molding with an outer trowel,
Lower and lower air that is movable up and down with a control cylinder connected to a gypsum mold and a compressed air supply means provided with a lower side engaging part and an upper side engaging part near the lower part and upper part around the body part, respectively. Consists of an upper air control mechanism that is connected to the control mechanism and the intake means and that can move up and down with a control lid,
The lower air control mechanism is provided below the plaster mold, and the upper air control mechanism is provided above the lower air control mechanism,
The lower air control mechanism is raised and the control cylinder is brought into contact with the engaging portion on the lower side of the gypsum mold, thereby forming the gypsum mold side air chamber around the lower side of the gypsum mold. And
On the other hand, the upper air control mechanism is lowered, and the control lid is provided with a certain space on the outer side of the molded product and is brought into contact with the engaging portion on the upper side of the plaster mold, thereby sealing the outer side of the molded product. A molded product release apparatus for ceramic products, characterized in that it is formed as an intake chamber on the molded product side.

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