JPH08127011A - Device and method for molding tile - Google Patents

Abstract

PURPOSE: To avoid generation of defective tiles by optionally setting a quantity of deformation of a protrusion, changing a shape of a recess on a back face of a tile, contracting the deformed protrusion, and pull it out. CONSTITUTION: A molding device forms a recess on a back face of a tile by a protrusion 8 of a rubber mold 5 arranged on a molding face. A hollow 12 is formed in the protrusion 8. The hollow 12 is connected to a pressure supplying source for supplying air or liquid by a predetermined pressure through a first open/close valve 21, and a suction device 24 for sucking air or liquid is also connected through a second open/close valve 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tile forming apparatus and a forming method for forming a recess such as a dovetail groove on the back surface of a tile used in dry construction.

[0002]

2. Description of the Related Art Conventionally, as a molding apparatus a of this type,
As shown in FIGS. 14 and 15, the powder material W is compression-molded by the upper and lower molds c in the mold b to mold the molded product W1 which is the base material of the tile T. It is known that the molding surface d is mounted with a rubber mold g made of rubber in which a projection f having a rectangular cross section is formed on the upper surface of the substrate e.

When the powder raw material is pressed by the upper and lower molds c during molding, the projection f is crushed downward by the pressing force and deformed into a trapezoidal shape with a wide upper side portion. Thus, the dovetail groove G on the back surface of the tile T after molding is formed.

Next, in order to remove the molded product W1 from the molding apparatus a, first, the upper mold c is moved upward and the mold frame b is moved downward to release the restraint of the molded body by the mold frame b. Then, while adsorbing the molded product W1 by an appropriate adsorption means, the molded product W1 is lifted up in an extremely short time in relation to the cost in continuous production, and finally the protrusion f embedded in the molded product W1 is removed from the molded product W1. Remove and complete molding.

The above-mentioned time for the projection f to be removed from the molded product W1 is usually several tens of milliseconds or less because the height of the projection f is about 1 to 3 mm.

As described above, since the molded product W1 is compression molded, the projection f is still embedded while being restrained by the molded product W1 only by releasing the constraint by the mold b, and the projection f is molded. Sometimes it remains in a crushed form, and since the time for the projection f to be removed from the molded product W1 is extremely short, the projection f remains trapezoidal before returning to its original shape. As a result of the removal of the dovetail groove, the tip sharp corner portion G1 of the opening in the dovetail groove G is chipped.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the amount of deformation of a protrusion can be set arbitrarily, and the deformed protrusion can be reduced and removed to prevent a tile from being damaged. It is intended to provide a molding method.

[0008]

SUMMARY OF THE INVENTION In view of the problems such as the loss of dovetail grooves at the time of mold release of a molded product based on the above-mentioned prior art, the present invention provides a hollow part in a protrusion forming a recess on the back surface of a tile, A tile forming apparatus and a forming method, which are characterized in that after compressing and deforming a projecting portion such that a gas or a liquid is supplied to and sucked into a hollow portion, the projecting portion is removed from the recessed portion to eliminate a defect. It is intended to solve the above-mentioned drawbacks by providing them.

In the tile forming apparatus, when the powder material is compression-molded by the mold and the upper and lower molds, the concave portion is formed on the back surface of the tile by the protrusion of the rubber mold provided on one molding surface of the upper and lower molds. A hollow portion is formed in the protrusion, and a communication passage communicating with the hollow portion is formed in a lower mold or an upper mold provided with a rubber mold, and gas or liquid is applied to the communication passage by a predetermined pressure. A pressurizing supply source for supplying pressure is connected via the first opening / closing valve, and a suction device for sucking gas or liquid is connected to the communication passage via the second opening / closing valve.

As a molding method, compression molding is carried out in a state where gas or liquid is pressurized and supplied at a predetermined pressure into the hollow portion inside the protrusion, and then the mold and the upper and lower molds are operated to release the molded product from the mold. After molding, the gas or liquid supplied to the hollow portion in the protrusion is sucked to reduce the pressure in the hollow portion, and the protrusion embedded in the molded product is removed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a tile forming apparatus for compression-molding a tile T for dry construction using a powder material W. The lower mold 3 is inserted into the vertically movable mold frame 2 so as to be relatively movable vertically, and the vertically movable upper mold 4 is arranged at the upper facing inlet of the lower mold 3. ing.

5 is a rubber which is an elastic body having a predetermined hardness,
A rubber mold formed of urethane or the like, and the rubber mold 5 is a molding surface 6 of the lower mold 3 or the upper mold 4 corresponding to the back surface side of the tile T.
The molding surface 6 of the lower mold 3 in this embodiment.
It is attached to.

Further, the rubber mold 5 is a protrusion for forming a concave portion T1 formed on the rear surface side of the tile T on the upper surface of the thin-walled substrate portion 7 which is closely attached to the molding surface 6 of the lower mold 3. A section 8 is provided.

The recess T1 of the tile T is shown in FIG.
The dovetail groove G is formed so that the back side is expanded with respect to the opening edge as shown in FIG.
Alternatively, as shown in FIG. 13, there is a hole H or the like in which the inner diameter is expanded with respect to the opening edge.

Further, as the protrusion 8 of the rubber mold 5,
First, as shown in FIGS. 5 to 8 corresponding to the dovetail groove G, which is a kind of the concave portion T1 of the tile T, a ridge 9 having a square cross section and a straight line is integrated from the upper surface of the substrate portion 7. Of the horizontal strip-shaped hollow portion 10, the flat strip-shaped hollow portion 10 having a wide cross-sectional shape in the lateral direction which is the width direction of the linear projection 9 is formed on the upper side of the horizontal strip-shaped hollow portion 10. On the lower side,
A vertical strip-shaped hollow portion 11 for communicating the outside with the horizontal strip-shaped hollow portion 10 is formed via the substrate portion 7, and the hollow portion having a T-shaped cross section as a whole.
12 is made up.

Further, in the protruding portion 8, the wall thickness above the horizontal strip-shaped hollow portion 10 in the hollow portion 12 and on the left and right sides are preferably substantially the same so that the stress during elastic deformation becomes uniform and durability is improved. Is improved.

It should be noted that the hollow portion 12 only communicates with the outside by the vertical strip-shaped hollow portion 11, and naturally both ends of the other ridges 9 in the linear direction are closed.

Next, as another embodiment of the projection 8 corresponding to the dovetail groove G, as shown in FIG. 9, a ridge 9 having a rectangular cross section and a straight line is formed from the upper surface of the substrate 7. A vertical strip-shaped hollow portion 11 is formed integrally with the protrusion 9 so as to vertically penetrate the ridge 9 and the substrate portion 7. On the other hand, a cap body 13 is formed in a lip groove shape in which openings at both ends are closed by separate bodies. The cap body 13 is formed with a ridge 9 between the tips of the lip sides 14 and 14a.
The cap body 13 is capped and attached to the ridge 9 so that the side surfaces 9a and 9b of the cap body 13 are closely attached to each other, and the inner space of the cap body 13 forms a hollow portion 12, and the vertical strip-shaped hollow portion 11 allows the cap body 13 to The hollow portion 12 communicates with the outside.

Next, as shown in FIG. 10, as a rubber mold 5 corresponding to the hole H which is a kind of the concave portion T1 of the tile T, a cylindrical projection 15 formed in a cylindrical shape is integrally projected from the upper surface of the substrate portion 7. Formed, to form a flat disk-shaped disk-shaped hollow portion 16 on the upper side of the cylindrical projection 15, on the lower side of the disk-shaped hollow portion 16,
A column-shaped hollow portion 17 that communicates the disc-shaped hollow portion 16 with the outside is formed through the substrate portion 7 to form a hollow portion 12 having a T-shaped cross section as a whole.

Another example of the rubber mold 5 is shown in FIG.
As shown in FIG. 11, a columnar cylindrical protrusion 15 is integrally formed on the upper surface of the substrate portion 7 so as to project therefrom, and a cylindrical hollow portion 17 is formed to vertically penetrate the cylindrical protrusion 15 and the substrate portion 7. ,
A part of the hollow sphere is cut off by a separate body to form a dome-shaped dome body 18, and the inner peripheral edges 18a and 18b of the opening portion of the dome body 18 are adhered to the outer peripheral surface 15a of the cylindrical projection 15. Attach the dome body 18 to the cylindrical projection 15 by attaching it,
The inner space of is formed with a hollow portion 12.

A communication passage 19 is formed in the lower mold 3 so as to communicate with the hollow portion 12 of the rubber mold 5, and a pressure control valve 20 is provided in the communication passage 19.
A suction device that connects a pressure supply source 22 that pressurizes and supplies gas or liquid via the first opening / closing valve 21 and that sucks gas or liquid via the second opening / closing valve 23 to depressurize the hollow portion 12.
24 connected.

Next, the molding method by the tile molding apparatus according to the present invention will be described. After raising the mold 2 by a predetermined amount with respect to the lower mold 3, the powder material W is filled into the mold 2,
Thereafter, the upper mold 4 is lowered, and the powder material W is compression-molded by a predetermined pressure applied by the mold 2, the lower mold 3, and the upper mold 4 to mold a molded product W1.

In the compression molding, first, the gas or liquid supplied from the pressure supply source 22 whose pressure is controlled to a predetermined pressure by the pressure control valve 20 before the compression molding is supplied to the hollow portion 12 through the communication passage 19. By performing compression molding in this state, the protrusion 8 is crushed and pressure-deformed into a trapezoidal shape having an expanded upper portion as a cross-sectional shape, which is the concave portion T1 on the rear surface side of the tile T after molding. The dovetail groove G and the hole H are formed.

The shape of the concave portion T1 is as follows:
It can be changed appropriately depending on the rubber hardness of the rubber mold 5, the supply pressure to the hollow portion 12, and the change in the internal volume of the hollow portion 12 in the protruding portion 8 does not cause any problem in the case of a non-compressible liquid. However, in the case of a gas having compressibility, the supply pressure and the like are set so that the gas can be reduced and deformed in the next step.

Next, the upper mold 4 is raised and the mold 2
To lower the molded product W1 from the mold 2 to remove the mold W2.
After releasing the constraint by releasing the pressing force, etc., the first opening / closing valve 21 is closed and the hollow portion of the gas or liquid from the pressurized supply source 22.
After shutting off the supply to 12, open the second on-off valve 23 and open the hollow part.
By sucking and discharging the gas or liquid in 12 to the outside by the suction device 24, the inside of the hollow portion 12 is sequentially depressurized,
As a result, the internal volume of the hollow portion 12 is gradually reduced, and the entire projection portion 8 is gradually reduced, preferably to such an extent that it does not come into contact with the opening edge of the recess T1 formed during the final pressing, and then the suction device is appropriately used. Molded product W1 (not shown)
Is suction-supported and lifted to remove the protruding portion 8 from the molded product W1, and the molding is completed.

With respect to the contraction deformation of the protrusion 8, the horizontal strip-shaped hollow portion 10 forming the hollow portion 12 has a wide flat shape in the lateral direction which is the width direction of the protrusion 9, so that the gas in the hollow portion 12 is deformed. Alternatively, by sucking the liquid, the upper wall 25 above the horizontal strip-shaped hollow portion 10 and the disk-shaped hollow portion 16 in the hollow portion 12 is first curved and deformed downward, whereby the horizontal strip-shaped hollow portion 10 and the disk-shaped hollow portion. As a result of pulling both left and right walls 26 of the portion 16 toward the center side, the expanded upper side of the pressure-deformed protrusion 8 is contracted, and the upper side of the vertical band-shaped hollow portion 11 and the cylindrical hollow portion 17 is also the same. , And as a result, the projection 8 is reduced as a whole.

[0027]

In summary, according to the present invention, when the powder raw material is compression-molded by the upper and lower molds in the mold, the protrusions of the rubber mold provided on the molding surface of one of the lower mold and the upper mold form the concave portion on the back surface of the tile. In the molding apparatus for forming the hollow part 12, a hollow part 12 is formed in the projection part 8 and a communication passage 19 communicating with the hollow part 12 is formed.
Is formed on the lower mold 3 or the upper mold 4 provided with the rubber mold 5, and the pressurizing supply source 22 for supplying the gas or liquid to the communication passage 19 under a predetermined pressure is connected via the first opening / closing valve 22. At the same time, the suction device 24 for sucking gas or liquid into the communication passage 19 is connected via the second opening / closing valve 23, so that gas or liquid having a predetermined pressure can be supplied into the hollow portion 12 of the protrusion 8 before compression molding. Therefore, the amount of deformation of the protrusion 8 can be set arbitrarily by setting the supply pressure, and the amount of deformation of the liquid can be made larger than that of the liquid because it is compressible in the case of gas. By sucking or discharging the gas or the liquid in the hollow portion 12 to the outside by the suction device 24, the inside of the hollow portion 12 is sequentially depressurized, and accordingly, the internal volume of the hollow portion 12 is gradually reduced, and the protrusions are formed. 8 The entire area is reduced in sequence, and the concave portion T1 formed during pressurization The size of the hollow portion 12 can be reduced to such an extent that the hollow portion 12 does not come into contact with the opening edge, so that the molded product W1 can be removed without damaging the concave portion T1. It is great.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a state before charging a powder raw material and pressure molding in a tile molding apparatus according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a state of pressure molding in the above molding apparatus.

FIG. 3 is a schematic cross-sectional view showing a demolded state of a molded product in the above molding device.

FIG. 4 is a schematic cross-sectional view showing a taken-out state of a molded product in the above molding device.

FIG. 5 is a schematic perspective view of a rubber mold corresponding to a dovetail groove of a tile in a molding device.

FIG. 6 is a schematic cross-sectional view showing a state before pressing of a rubber mold corresponding to a dovetail groove of a tile in the molding apparatus.

FIG. 7 is a schematic cross-sectional view showing a state when the rubber mold is being pressurized.

FIG. 8 is a schematic cross-sectional view showing a state in which the inside of the hollow portion of the rubber mold is sucked and reduced and deformed.

FIG. 9 is a schematic sectional view showing another embodiment of the same rubber mold.

FIG. 10 is a schematic cross-sectional view showing a state before pressurization of a rubber mold corresponding to a hole of a tile in a molding device.

FIG. 11 is a schematic sectional view showing another embodiment of the same rubber mold.

FIG. 12 is a perspective view of a tile in which a dovetail groove is formed.

FIG. 13 is a plan view and a partial cross-sectional view of a tile in which holes are formed.

FIG. 14 is a schematic sectional view showing a conventional molding apparatus.

FIG. 15 is a schematic cross-sectional view showing a deformed state of a rubber mold in the same molding apparatus.

[Explanation of symbols]

 3 Lower mold 4 Upper mold 5 Rubber mold 8 Projection part 12 Hollow part 19 Communication passage 21 First opening / closing valve 22 Pressurized supply source 23 Second opening / closing valve 24 Suction device

Claims (2)

[Claims] 1. A molding apparatus for forming a concave portion on the back surface of a tile by a protrusion of a rubber mold provided on one molding surface of a lower mold or an upper mold when a powder raw material is compression molded by an upper mold and a lower mold in a mold frame. In, while forming a hollow portion in the protrusion,
A communication passage communicating with the hollow portion is formed in a lower mold or an upper mold provided with a rubber mold, and a pressure supply source for pressurizing gas or liquid to the communication passage at a predetermined pressure is provided via the first on-off valve. A tile forming apparatus, which is connected to a suction device for sucking gas or liquid into the communication path via a second opening / closing valve. 2. A molding method in which a recess is formed on the back surface of a tile by a protrusion of a rubber mold provided on one molding surface of a lower mold or an upper mold when a powder material is compression-molded by an upper mold and a lower mold in a mold. In the above, compression molding is performed in a state in which a gas or liquid is pressurized and supplied to the hollow portion inside the protrusion portion by a predetermined pressure, and then the mold and the upper and lower molds are operated to release the molded product from the mold,
Next, the tile forming method is characterized in that the gas or liquid supplied to the hollow portion inside the protrusion is sucked to reduce the pressure inside the hollow portion, and the protrusion embedded in the molded product is removed. .