JPH09300333A - Dry molding method for laminated tile and molding apparatus used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a tile raw material remaining by sticking to a powdery measure from being mixed in another kind of a tile raw material above a molding recessed part in return motion of the powdery measure by a method wherein different tile raw materials arc enabled to be filled in a laminated state in the molding recessed part based on simple advance and retreat motion of the powdery measure in molding the laminated tile. SOLUTION: A plurality of powdery measures 20, 22 are, in a state of being linked before and after, advanced along an upper surface of a frame mold 10, a tile raw material therein is successively fed into a molding recessed part 14, and laminated. Thereafter, the blanked powdery measures 20, 22 are retreated, and the front side measure 20 is retreated in retreat motion by being evacuated above the upper surface of the frame mold 10 in passing at least the molding recessed part 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry molding method for laminated tiles and a molding apparatus used therefor.

[0002]

2. Description of the Related Art As a method for forming a ceramic tile, a powdery tile raw material is supplied and filled into a molding recess formed by a lower mold and a frame mold, and then the upper mold is closed to press the tile raw material, There is a dry molding method of press molding, which is widely practiced.

By the way, there is a type of tile in which a plurality of layers made of different materials are stacked one above the other.
As a method for forming such a laminated tile, a method as shown in FIG. 8 is conventionally known (for example, Japanese Patent Publication No. 2-6048).
7).

FIG. 8 shows an example in which two types of tile raw materials are laminated vertically and molded. In the figure, 100 is a frame die and 102 is a relative slide along the inner surface of the frame die 100. The lower die 104 is fitted to the frame die 104 by the relative lowering movement of the lower die 102 or the relative raising movement of the frame die 100.
00 and the lower mold 102 are molding recesses.

Reference numerals 106 and 108 denote powder containers for accommodating different powdery tile raw materials 110 and 112, respectively, and supplying / filling the tile raw materials 110 and 112 into the molding recess 104. The upper surface and the lower surface are opened. It has a form.

In the molding method of this example, first, the powder container 106 is moved forward and backward in the X direction along the upper surface of the frame mold 100,
During the forward movement, the tile raw material 110 in the powder container 106 is dropped and supplied into the molding recess 104, and then another powder container 10 is placed.
8 is moved forward and backward along the Y direction, and at the time of forward movement, the tile raw material 112 inside the powder container 108 is dropped and supplied into the molding recess 104.

As a result, different types of tile raw materials 110 and 112 are vertically stacked in the forming recess 104, and then the upper mold 114 is lowered to press the tile raw material and press it into a laminated tile. Mold.

[0008]

However, in the case of this molding method, it is necessary to move the powder container back and forth in two directions, the X direction and the Y direction, which limits the usable press device. is there.

That is, it is necessary to use a four-column type press device having an opening in two directions of X direction and Y direction as a pressing device, and a two-column type press device having an opening in only one direction of X direction or Y direction. However, there is a problem that the press machine cannot be used.

Further, when the tile raw material is supplied / filled into the molding concave portion 104, the two powder containers 106 and 108 must be moved forward and backward for two cycles as a whole, which prolongs the press molding cycle time of the tile. Therefore, there is a problem that productivity becomes low.

Further, it is necessary to provide two sets of charging devices for feeding the powdery tile raw materials 110 and 112 into the molding recesses 104 by moving the powder stubs 106 and 108 forward and backward, which increases the initial equipment cost. Another problem is that a large space is occupied by these two sets of charging devices.

Therefore, the inventor of the present invention successively stacks different kinds of powdery tile raw materials in a molding recess formed by a frame die and a lower die slidably fitted to the inner surface of the frame die. In a method of supplying and filling, then closing the upper mold and pressurizing, thereby press-molding a laminated tile, directly or indirectly connecting front and rear a number of powder basins according to the type of the tile raw material, By advancing in the connecting direction along the upper surface of the frame die, sequentially supplying each tile raw material inside the powder container into the molding recess to be laminated in the molding recess, and then the empty powder containers are emptied. A method for forming a laminated tile by compressing and compressing the tile material in a laminated state together with the upper mold after the backward movement is devised and proposed in the previous patent application (Japanese Patent Application No. 7-20965).

According to this method, conventionally required two-direction or three-direction (when the tile raw materials are laminated in three layers)
It is possible to successively stack a plurality of different tile raw materials in the molding recesses by simply advancing and retracting the connecting body of the powder shavings in only one direction without requiring the movement of the powder stubs to and from the molding cavities.

Therefore, it is possible to solve the problem that the pressing device is limited, such that not only the four-column type pressing device but also the two-column type pressing device can be used as the pressing device.
In addition, when filling the molding recess with the tile raw material, it is not necessary to reciprocate the powder container by a number (cycle) corresponding to the number of laminated different tile raw materials. Even so, it is possible to supply the different kinds of tile raw materials into the molding recess by only one reciprocating motion.

In some cases, it is possible to stack four or more layers of different tile raw materials, which has been difficult in the past. Therefore, regardless of the number of tile raw materials, the tile raw material can be supplied and laminated by only one reciprocating motion of the powder slag, so the cycle time of press molding is greatly shortened and the productivity of tile production is improved. Can be increased.

Since only one charging device is required, the equipment cost can be reduced and the space occupied by the charging device can be reduced.

However, during the execution of this molding method, when the tile raw material adhered to and remains on the front shavings is moved backward, the uppermost tile raw material laminated in the molding recess, that is, the front tile raw material. It was experienced that there was an inconvenience that different kinds of tile raw materials were mixed with the tile raw material inside the powder pit.

[0018]

The invention of the present application has been made to solve such a problem. Thus, according to the invention of the present application, different kinds of powdery tile raw materials are sequentially supplied in a laminated state in a molding recess formed by a frame die and a lower die slidably fitted to the inner surface of the frame die. In a method of filling, then closing the upper mold and pressurizing, thereby press-forming a laminated tile, a plurality of box-shaped powder containers having upper and lower surfaces open or directly in a number corresponding to the type of the tile raw material. Indirectly connecting to the front and back, advancing the powder containers in the connecting direction along the upper surface of the frame mold, and sequentially supplying the tile raw material inside each powder container into the molding recesses to stack them in the molding recesses. Then, while moving the emptied powder basins backwards, at the time of the retreating motion, the front-side powder basins other than the rear-end powder basin are moved above the upper surface of the frame mold at least when passing through the molding recess. To the upper surface of the frame mold after the passage. And returning the location position (claim 1).

Another invention of the present application is a molding apparatus used for carrying out the molding method according to claim 1, wherein (a) the frame mold, the lower mold and the upper mold, and (b) different kinds of tile raw materials, respectively. A plurality of powder containers to be housed, directly or indirectly connected to the front and back,
(C) A powder container driving device that drives the powder container forward and backward in the connecting direction, and (d) a guide mechanism that guides the movement of the powder container, and the guide mechanism is lateral to the front powder container. And a supported portion provided in a protruding shape on the lower side of the self-supporting portion during forward movement, while supporting the supported portion by riding on the upper side of itself during backward movement. It has a guide rail for moving and guiding (claim 2).

According to still another aspect of the present invention, in claim 2, the supported portion of the guide rail is moved below the guide rail when moving forward, and is moved up on the guide rail when moving backward. A passage switching means is provided (Claim 3).

[0021]

As described above, according to the first aspect of the present invention, when molding a tile having a laminated structure, a plurality of powder slags are moved forward and backward in a state of being connected to each other so that a different kind of tile raw material is placed in the molding recess. Are stacked, and when the backward movement is performed, the backward movement is performed while retreating the front-side dust barrel upward from the rear-end dust barrel. According to the present invention, the above-mentioned applicant's proposal In addition to the effect similar to that of the molding method of Japanese Patent Application No. 7-20965, in addition to the fact that the powder container on the front side moves backward while retracting upward when the powder container moves backward, it is laminated in the molding recess. It is possible to surely avoid the inconvenience that another type of powder raw material that remains attached to the powder container on the front side is mixed with the uppermost powder raw material.

Next, a second aspect of the present invention relates to a molding apparatus. According to the present invention, the supported portion is provided on the side of the front dust container in a protruding manner, and the supported portion is supported to guide the movement. A guide rail is provided to allow the supported portion to pass under the guide rail during forward movement, and to support the supported portion by the guide rail by letting the supported portion ride on the guide rail during backward movement. In the present invention, the front-side powder container is moved backward by the guide rails and the supported portions according to the present invention when the powder container after the tile raw material is supplied to the molding recess is moved backward. With the guide mechanism, it is possible to smoothly and reliably retreat to the upper side, and to move backward in that state.

According to the present invention as described above, it is possible to realize the upward retreating operation of the powder container during the backward movement with a simple device configuration.

According to the third aspect of the present invention, the guide rail is provided with the passage switching means, and the passage switching means allows the supported portion of the front dust container to pass under the guide rail during the forward movement, and during the backward movement. According to the present invention, the passage of the supported portion can be smoothly switched by means of the passage switching means, and consequently, the retracting movement of the powder shavings upward can be made simple. Can be done smoothly.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, 10 is a frame die, 12 is a lower die that can relatively slide vertically along the inner surface of the frame die 10, and 14 is a molding recess formed by the frame die 10 and the lower die 12. Reference numeral 16 is an upper mold for pressing the powdery tile raw material together with the frame mold 10 and the lower mold 12 to form a predetermined tile shape.

Numerals 20 and 22 are box-shaped and open-bottomed upper and lower sluices for accommodating different tile raw materials inside, respectively, and sequentially supplying them to the molding concave portion 14, and they are rotated relative to each other by a link 24. Connected as possible.

In FIG. 1, a drive cylinder 26 as an advancing / retracting drive device is further connected to the rear (left) powder container 22, and the powder cylinders 20 and the two powder containers 20 connected in front and rear by the drive cylinder 26 are connected. 22 is adapted to be moved forward and backward.

A partitioning unit 28 is housed in each of the powder containers 20 and 22 as shown in FIG. The partition unit 28 has a configuration in which a plurality of partition plates 30 extending in a direction perpendicular to the advancing / retreating direction of the powder crucibles 20 and 22 are connected by a connecting rod 32.

In FIG. 2, reference numeral 34 denotes a slide plate, and the slide plate 34 is integrally provided with the frame mold 10 with its upper surface flush with the upper surface of the frame mold 10 as shown in FIG. Has been.

A side frame 36 is provided at an end portion in the width direction of the slide plate 34 in a state of standing upright vertically. Further, large and small Ls are formed on inner surfaces of the pair of side frames 36.
The angle member is fixedly provided, and the guide rail 38 is formed by them. The guide rail 38 has a horizontal piece 40 and a vertical piece 42.

On the other hand, the powder crucibles 20 and 22 are provided with arms 44 and 46 serving as supported portions in a state of protruding laterally. A roller 48 is rotatably provided at the tip of one arm 44 so as to be concentric with the axis of the arm 44, and the roller 48 is rotatable around the vertical axis of the other arm 46. It is provided in.

Here, a roller 48 provided on the arm 46
Is brought into contact with the inner surface of the vertical piece portion 42 of the guide rail 38 and exerts the guiding action of the guide rail 38 on the powder particles 20 and 22, and the roller 48 of the arm 44 is provided on the upper surface of the horizontal piece portion 40 of the guide rail 38. It is supported and exerts its guiding action on the powder container 20.

As shown in FIG. 1, the guide rail 38 is provided with a pair of movable pieces 50 and 52 which are vertically rotatable around a shaft 54 at the front position and the rear position of the molding recess 14, respectively. Has been. Here, the movable piece 50 on the front side
Is rotatable downward by its own weight, and the rear movable piece 52 is biased upward by a spring 56. However, it is normally held in a horizontal position by a stopper (not shown). The movable pieces 50 and 52 and the spring 56 are provided on the arm 44 of the front dust container 20.
It constitutes a switching means for switching the passage.

Next, the method of forming the laminated tile of this example will be described in detail with reference to FIGS. 4 to 7 together with its operation.
In this example, powdery tile raw materials 58 and 60 are respectively accommodated in the powder buckets 20 and 22, and in this state, the drive cylinder 26 links the powder buckets 20 and 22 to the link 24.
Slide plate 34 in the connecting direction in the connected state by
Move forward on top. At this time, the slide plate 3
4 is raised together with the frame mold 10 by a predetermined minute distance. In this state, first, when the front-side powder container 20 reaches above the molding recess 14 formed by the frame mold 10 and the lower mold 12, the powder container 2
The tile raw material 58 accommodated inside
Dropped into 4 and supplied.

At this point in time, both the front and the rear powder containers 20 and 22 are on the upper surface of the slide plate 34, and therefore the arm 44 extending from the front-side powder container 20.
The roller 48 of the horizontal rail 4 of the guide rail 38
The roller 48 of the arm 46 extending from the powder container 22 on the rear side is in contact with the inner surface of the vertical piece 42 of the guide rail 38. In addition, the roller 48 of the rear side of the dust container 22 abuts on the vertical piece 42 of the guide rail 38 during both the forward movement and the backward movement so that the guide action of the guide rail 38 is exerted on the powder drum (FIG. 7). (C)).

Now, in the state of FIG. 4 (II), when the tile raw material 58 inside the front syrup 20 is supplied into the inside of the molding recess 14, the lower die 12 is then moved down by a predetermined minute distance, or further, the frame. The mold 10 is moved upward, and in that state, the powder slags 20 and 22 continue to move forward, and the rear powder stub (rear end powder stub) 22 forms the tile raw material 60 inside the recess 14 inside. And supply to. Figure 4 (II
I) shows this state.

In this way, the tile raw materials 58, 6 inside
As shown in FIG. 5 (IV), the powder crucibles 20 and 22 in which 0 is supplied into the molding concave portion 14 further move forward in the empty state. At this time, the arm 44 and the roller 48 in the front-side powder container 20 move the movable piece 5 at the front side position of the molding recess 14.
Pass through the same part while pushing up 0.

The powder crucibles 20 and 22 that have reached the forward end are subsequently moved backward by the drive cylinder 26. At this time, the powder container 22 on the rear side is directly attached to the slide plate 34.
Move backwards. On the other hand, in the front side of the dust container 20, the arm 44 and the roller 48 move the front movable piece 50 during the backward movement.
At this point, the movable piece 50 is in a state of being rotated downward, so that the arm 44 and the roller 4 are reached.
8 is lifted up by this movable piece 50, and is made to ride on the upper surface of the horizontal piece 40 in the guide rail 38 (FIG. 5 (V)).

After that, the arm 44 and the roller 48 in the front dust container 20 are moved backward while being supported by the upper surface of the horizontal piece 40 of the guide rail 38. That is, the front dust container 20 passes through the molding recess 14 in a state of being retracted upward (FIGS. 5 (VI) and 7 (B)).

When the arm 44 and the roller 48 reach the position of the movable piece 52 at the rear side position of the molding recess 14,
Therefore, the movable piece 52 is rotated downward by the weight of the dust container 20 against the urging force of the spring 56 (see FIG. 6 (VI
I)). Therefore, the arm 44 and the roller 48 in the front dust pan 20 are guided by the turning piece 52 to move downward, and the dust pan 20 is placed on the slide plate 34 again. Then, in that state, it is continuously moved backward and returned to the backward end, that is, the initial position (see FIG. 6 (VII
I)).

As described above, since the front-side powder container 20 passes through the molding recess 14 in the retracted state during the backward movement, even if the tile raw material 58 remains attached to the front-side powder container 20, the backward movement is performed. Sometimes, the problem that the tile raw material 58 mixes with the upper tile raw material 60 does not occur.

As described above, according to this example, the powder crucibles 20, 2
In the backward movement of No. 2, since the front-side powder stub 20 retreats while retreating upward, the upper tile raw material 60 stacked in the molding recess 14 is attached to the front-side powder stub 20 and remains. It is possible to reliably avoid the inconvenience that the tile raw materials 58 of different types are mixed.

Further, according to the apparatus of this embodiment, after the tile raw materials 58 and 60 are supplied to the molding concave portion 14, when the powder barrels 20 and 22 are moved backward, the front-side powder barrel 20 is smoothly and surely moved by the guide mechanism. It is possible to retreat to the upper side and move backward in that state.

Further, according to this embodiment, the passages of the arms 44 and the rollers 48 can be smoothly switched by the passage switching means having the movable pieces 50 and 52 and the spring 56 as elements, so that the powder container 20 in the backward movement is moved. The upward retreating operation can be performed with a simple device configuration.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention can be embodied and configured in various modified modes and forms without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a molding apparatus used for carrying out a method according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing a main part of the apparatus in FIG.

FIG. 3 is a view showing separately the powder container and the partition unit inside thereof in FIG.

FIG. 4 is a process explanatory view of the method of the example.

FIG. 5 is a drawing of a step different from that of FIG. 4 in the method of Example.

FIG. 6 is an explanatory view of a step different from FIGS. 4 and 5 of the method of the embodiment.

FIG. 7 is a diagram showing a positional relationship between front and rear powder sluices in the method of the embodiment.

FIG. 8 is an explanatory diagram of a conventionally known method for forming a laminated tile.

[Explanation of symbols]

 10 Frame Mold 12 Lower Mold 14 Molding Recess 16 Upper Mold 20,22 Powder Cylinder 26 Drive Cylinder 38 Guide Rail 40 Horizontal Piece 42 Vertical Piece 44,46 Arm 48 Roller 50,52 Movable Piece 54 Shaft 56 Spring 58,60 Tile material

Claims (3)

[Claims] 1. A different type of powdery tile raw material is sequentially supplied and filled in a laminated state into a molding recess formed by a frame mold and a lower mold slidably fitted to the inner surface of the frame mold, Thereafter, the upper mold is closed and pressure is applied, and in the method of press-forming the laminated tiles, a plurality of box-shaped and upper and lower powder-shaped powder containers corresponding to the type of the tile raw material are directly or indirectly connected back and forth. The tile raw materials inside the respective powder crucibles are sequentially fed into the molding recesses to be stacked, and then the powder crucibles are stacked in the molding recesses. While retreating the emptied powder containers, at the time of the retreat motion, the front-side powder containers other than the rear-end powder container are retracted above the upper surface of the frame mold at least when passing through the molding recess. Move it backwards and place it on the upper surface of the frame after passing it. A method for dry-molding a laminated tile, which comprises returning. 2. A molding apparatus used for carrying out the molding method according to claim 1, wherein (a) the frame mold and the lower mold, and (b) the different types of tile raw materials are respectively housed directly before and after or And a guide mechanism that guides the movement of the powder container, and (d) a powder container driving device that (c) drives the powder container forward and backward in the connecting direction. A supported portion provided on the side of the front dust container in a protruding shape, and while allowing the supported portion to pass below itself during forward movement,
An apparatus for forming a laminated tile, comprising: a guide rail that allows the supported portion to ride on the upper side of itself during the backward movement and supports and guides the movement. 3. The guide rail according to claim 2, wherein the guide rail is provided with a passage switching means for moving the supported portion below the guide rail when moving forward, and for riding on the guide rail when moving backward. An apparatus for forming a laminated tile, which is characterized in that