JP2004188766A - Dry production method for accessary tile and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dry production method which can determine the inside and outside shapes of the bent part of an accessary tile freely to some extent, and an apparatus for the method. <P>SOLUTION: In the dry production method for compacting a body Z to produce an L-shaped accessary tile, a press means, which is equipped with a lower mold wherein a mold recessed part assuming the shape of the turned-out accessary tile is formed in a V-groove, and an upper mold having a mold protruded part 6, which has an inverted triangular shape, fitted in the mold recessed part, is used. The leveled cut surface shape of the body Z packed into the mold recessed part is set so that a pressure adjusting clearance S, which is smaller than the falling quantity of the main surface of the mold protruded part 6 up to the completion of pressing after the contact with the surface Z1 of the body Z, is formed between the bent part corresponding-part of the accessary tile of the mold protruded part and the surface Z1 of the body Z in such a state that the flat plate corresponding part of the accessary tile of the mold protruded part 6 of the upper mold is in contact with the surface Z1 of the body Z. The excess pressurization of the bent part of the accessary tile which can occur when the inside and outside shapes of the bent part are set arbitrarily is reduced by the pressure adjusting clearance S. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dry manufacturing method and a dry manufacturing apparatus for manufacturing a so-called accessory tile bent in a substantially L shape.
[0002]
[Prior art]
A conventional dry manufacturing method for manufacturing the accessory tile T shown in FIGS. 3C and 4C will be described with reference to FIGS. 3 (c) and FIG. 4 (c), the symbol X is a flat portion of the accessory tile T, and the symbol Y is a bent portion between the flat portion X and the flat portion X.
[0003]
The manufacturing apparatus used in the dry manufacturing method includes a pressing means 1 for compacting the clay Z and a charger 2 for supplying the clay Z to the pressing means 1.
The pressing means 1 comprises a lower mold 5 having a mold recess 3 substantially shaped like an inverted accessory tile T provided in a V-shaped groove 4 having an upper surface opening, and a substantially inverted triangular mold protrusion fitted into the mold recess 3. And an upper mold 7 having a portion 6.
The lower mold 5 includes a frame 51 supported so as to be able to move up and down with respect to a fixed portion of the apparatus, and a fixed piece slidably fitted in a mold hole 52 formed in the frame 51. When the frame 51 is at the raised position as shown in FIG. 5A, the mold recess 3 is formed by the upper surface of the piece 53 and the mold hole 52 of the frame 51.
In the upper mold 7, the surface of the mold protrusion 6 is covered with a synthetic resin layer (not shown), and the anti-peeling groove 8 engraved on the back surface of the accessory tile T is carved in the synthetic resin layer. A ridge (not shown) is provided to protrude. The surface of the mold projection 6 excluding the projection is referred to as a main surface.
[0004]
On the other hand, the charger 2 has a rectangular bottomless frame shape, and is mounted on the upper surface of the lower die 5 so as to be slidable on the V groove 4. Although not shown, the front plate 2F and the rear plate 2R which form the front and rear of the charger 2 are provided with inverted triangular plates which are loosely fitted in the V-grooves 4. Further, a powder cutting plate 9 is attached to the charger 2 at the front side of the front plate 2F so as to be freely inserted and removed in the vertical direction. The powder cutting plate 9 has a shape conforming to the V-shaped groove 4 of the lower die 5 and performs a function of filling the mold concave portion 3 with the clay Z put into the V-shaped groove 4 in a cut-off state.
[0005]
When the accessory tile T is formed by the pressing means 1 of the above-described manufacturing apparatus, first, the charger 2 on the lower mold 5 is filled with the clay Z, and the charger 2 is slid back and forth on the V-groove 4. Reciprocate. As described above, since the charger 2 has a bottomless frame shape, when the charger 2 passes over the mold recess 3, the clay Z present therein enters the mold recess 3. Then, when the charger 2 is returned to the original position, the powder cutting plate 9 slides into the V-groove 4 to scrape off the excess clay Z, so that the powder cutting plate 9 is cut into the mold recess 3 as shown in FIG. Then, the clay Z remains.
[0006]
Next, as shown in FIG. 5 (c), the upper mold 7 is lowered, the mold projection 6 is fitted into the mold recess 3 of the lower mold 5, and the clay Z is pressed at a predetermined pressure. Thus, the upper mold 7 is moved upward, the frame 51 of the lower mold 5 is further lowered, and the compacted accessory tile T is relatively raised and taken out of the mold recess 3. Note that the main surface of the mold convex portion 6 (the surface excluding the convex streaks for forming the separation preventing groove 8 on the back surface of the accessory tile T as described above) is pressed from the start of pressing to the pressing of the clay surface Z1 to the end of pressing. The amount of vertical downward movement of the mold projection 6 up to here is hereinafter referred to as “pressing allowance”. Generally, the pressing margin of the standard accessory tile T having a thickness of about 7 mm after firing is about 4 to 5 mm.
[0007]
The press-formed product of the accessory tile in which the kneaded clay Z is solidified as described above is placed and arranged on a dedicated sagger 10 as shown in FIG. 7, and fired by a conventionally known method.
[0008]
[Problems to be solved by the invention]
In the dry manufacturing method of the accessory tile T, if the flat plate portion X and the bent portion Y are not uniformly pressed, shrinkage due to firing becomes uneven, and the width of the flat plate portion X and the bent portion Y are not uniform. In the current standard accessory tile T, the outer corner of the bent portion Y has an arc with a radius of about 3 mm, and the inner corner has an arc with a radius of about 3 to 5 mm. When compacted in step 1, the bent portion Y and the flat portion X are pressed almost uniformly, and the width of the flat portion X and the bent portion Y after firing are substantially equal.
On the other hand, the same accessory tile T has a larger radius of the arc at the outer corner of the bent portion Y, but in such a role tile T, the radius of the arc at the inner corner is also increased and the pressure of the bent portion Y is reduced. It is adjusted so as not to rise as compared with the flat plate portion X. In other words, the conventional accessory tile T determines the shape of the outer corner of the bent portion Y from the viewpoint of design importance, determines the shape of the inner corner corresponding to the shape of the outer corner, and then determines the bent shape. The pressure of the portion Y is adjusted so as to be equal to the pressure of the flat plate portion X, and there is a freedom to independently determine the shape of the inside of the bent portion Y of the accessory tile T from the shape of the outside. There is no.
[0009]
By the way, the special sagger 10 is used for firing the accessory tile T as described above. The sagger 10 for the accessory tile has a mountain-shaped mounting portion 10a, and the accessory tiles T are laid face-up on the mounting portion 10a and fired. The shape of 10a is made to fit the back surface shape of the accessory tile T.
[0010]
According to the above-described conventional method of manufacturing the accessory tile T, the shape of the inner corner changes depending on the shape of the outer corner of the bent portion Y. Therefore, the sagger 10 that matches the shape of the outer corner of the bent portion Y is prepared. There is a need to. Of course, mass production of the accessory tile T requires a large amount of the sagger 10 even if only one kind, so a huge capital investment was required to change the shape of the bent portion Y of the accessory tile T. .
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a method of dry-manufacturing a tile for an accessory tile and a dry manufacturing method capable of freely determining the shape of a bent portion Y of the accessory tile T to the inside and the outside to some extent. In providing the equipment.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a dry manufacturing method for manufacturing a roughly L-shaped accessory tile by compacting kneaded clay. Using a pressing means provided with a lower mold provided in a V-shaped groove and an upper mold having a substantially inverted triangular mold convex portion fitted into the mold concave portion, and In the state in which the portion corresponding to the flat portion of the accessory tile in the upper mold convex portion is in contact with the surface of the kneaded clay, the sliding surface shape of the soil corresponds to the bent portion of the accessory tile in the mold convex portion. Bending that can occur when the inside and outside shapes of the bent portion of the accessory tile are arbitrarily set by setting a pressure adjustment gap smaller than the pressing allowance of the mold convex portion between the portion and the kneaded clay surface Dry manufacturing method of the accessory tiles in which excessive pressurization of the part is reduced by the pressure adjustment gap and pressed. Subjected to.
[0013]
As described above, for example, if the pressure of the bent portion of the accessory tile is higher than that of the flat plate portion, shrinkage due to firing becomes unbalanced, and the width of the bent portion is larger than the flat plate portion. For this reason, conventionally, means for adjusting the radius of the arc inside the bent portion to make the pressure uniform has been taken. However, in the dry manufacturing method of the present invention, the portion corresponding to the bent portion of the mold convex portion and the mold in the cut-off state are cut off. By forming the pressure adjustment gap as described above between the ground and the soil surface, the pressing allowance at the bent portion is reduced by the pressure adjustment gap, and the pressure at the bent portion is reduced accordingly. Of course, since the pressure adjustment gap is smaller than the pressing allowance of the mold convex portion, the bent portion is finally pushed by the mold convex portion to have a shape according to the mold convex portion.
[0014]
Further, as described in claim 2, a dry manufacturing apparatus for manufacturing a substantially L-shaped accessory tile, comprising a pressing means for compacting the clay and a charger for supplying the clay to the pressing means. In the pressing means, the lower mold provided with a mold recess substantially shaped like an inverted accessory tile in a V-shaped groove having an upper surface opening, and a substantially inverted triangular mold protrusion fitted into the mold recess. The charger has a plate shape having a shape conforming to the V-groove of the lower die, and slides in the V-groove to fill the mold recess into the mold recess. When having a powder cutting plate, when the thin tip of the upper mold convex portion is overlapped with the thin tip of the powder cutting plate, an extended projection projecting from the contour of the mold convex portion to the periphery is formed. On the other hand, an extended depression corresponding to the extended projection of the powder cutting plate is formed at the groove bottom of the V groove, and The is can provide a dry manufacturing apparatus tile made smaller than the pressing margin. With this dry manufacturing apparatus, the manufacturing method of claim 1 can be easily implemented.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 (a) to 1 (c) are enlarged views of a main part showing a manufacturing process, FIG. 2 is a front view showing a powder cutting plate and a tip of a mold convex portion overlapped, and FIGS. 3 (a) to 3 (c). 4) is a perspective view of the accessory tile viewed from the back side, and FIGS. 4A to 4C are plan views of main parts showing bent portions of the accessory tile.
[0016]
Since the description of the dry manufacturing apparatus and the manufacturing method described in the section of the related art applies to the present invention almost as it is, the description of the overlapping parts will be omitted.
[0017]
The feature of the dry manufacturing apparatus of the present invention is that, as shown in an enlarged manner in FIG. 2, the narrow end of the mold projection 6 of the upper die 7 is attached to the narrow end of the powder cutting plate 9. An extended projection 11 is formed to project outward from the contour of the mold projection 6 when superimposed as indicated by a dashed line, while the extended projection 11 of the powder cutting plate 9 is formed at the bottom of the V-groove 4. The present invention is characterized in that an expanding recess 12 is formed, and the size of the expanding protrusion 11 is made smaller than the pressing allowance.
[0018]
According to the dry manufacturing apparatus of the present invention having such features, as shown in FIG. 1 (b), the shape of the cut surface of the clay Z filled into the mold recess 3 in the cut state is upward. In the state where the main surface portion corresponding to the flat plate portion X of the accessory tile T in the mold convex portion 6 of the mold 7 is in contact with the clay surface Z1, the mold convex portion 6 corresponds to the bent portion Y of the accessory tile T in the mold convex portion 6. A pressure adjusting gap S corresponding to the extended protrusion 11 of the powder cutting board 9 is formed between the portion to be formed and the kneaded material surface Z1. Since the press allowance of the mold convex portion 6 is reduced by the pressure adjustment gap S and the pressure applied to the bent portion Y is surely weakened, the size of the pressure adjustment gap S is adjusted by adjusting the size of the pressure adjustment gap S. The pressure can be made uniform. Of course, as shown in FIG. 1 (c), the bent portion Y is finally pressed and molded by the mold convex portion 6, so that the shape of the bent portion Y is finished as intended.
[0019]
【Example】
The shape shown in FIGS. 3A and 4A having a thickness of about 7 mm after firing, a width of about 45 mm, an inner corner radius of the bent portion Y of about 3 mm, and an outer corner arc of about 10 mm. Was manufactured by the manufacturing apparatus of the present invention. Extended protrusion 11 (= pressure adjustment gap S) size powder cutting plate 9, and the maximum vertical width of about 0.6 mm, an area of about 1.45 mm ² in FIG. 2 (Figure 1 (b)). In the fired accessory tile T, the difference in width between the bent portion Y and the flat plate portion X was within a range in which there was no practical problem.
The shape of the inside corner of the bent portion Y of the accessory tile T manufactured this time is the same as that of the currently mass-produced accessory tile T shown in FIGS. 3C and 4C. . Therefore, it could be fired without any trouble in the existing sagger.
[0020]
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, in the embodiment, the outer shape of the bent portion Y of the accessory tile T is formed in an arc shape, but may be formed as a straight chamfered shape as shown in FIGS. 3B and 4B. Incidentally, according to the conventional manufacturing method, the inside of the bent portion Y must be formed into a straight chamfered shape, and a dedicated sagger is required.
Further, in the embodiment, the powder cutting plate 9 is detachable from the charger 2. However, for example, a front plate 2F of the charger 2 may be used as the powder cutting plate 9. In addition, the powder cutting plate 9 is not limited to sliding integrally with the charger 2 but may be sliding independently.
[0021]
Further, according to the results of repeated trial production by the inventor, it has been confirmed that the pressure applied to the bent portion Y is also affected by the length of the separation preventing groove 8 on the back surface of the accessory tile T. That is, the pressure applied to the bent portion Y decreases as the tip of the separation preventing groove 8 moves away from the bent portion Y. It is considered that the reason is that the ridge provided on the mold convex portion 6 for engraving the separation preventing groove 8 exerts an action of increasing the pressure. Therefore, by combining the means for providing the pressure adjustment gap S of the present invention with the means for separating the tip end of the separation preventing groove 8 from the bent portion Y, the pressure adjustable range of the bent portion Y can be expanded.
[0022]
【The invention's effect】
The dry manufacturing method of the present invention is to provide a pressure adjusting gap as described above between the portion corresponding to the bent portion of the mold convex portion and the surface of the kneaded clay in the sliding state, thereby reducing the pressing allowance of the bent portion. Since the pressure at the bent portion is reduced by that amount, the pressure applied to the bent portion can be reliably reduced. Therefore, by appropriately adjusting the size of the pressure adjusting gap, it is possible to equalize the pressure between the bent portion and the flat plate portion. Of course, since the pressure adjustment gap is made smaller than the pressing allowance of the mold convex portion, the bent portion is finally pushed by the mold convex portion, so that the shape conforms to the mold convex portion.
Thus, the dry manufacturing method of the present invention allows the shape of the bent portion of the accessory tile to be determined to some extent freely on the inside and the outside, so that, for example, the radius of the outer corner of the bent portion is increased from the viewpoint of emphasis on design, On the other hand, from the viewpoint of cost consideration, it is possible to match the shape of the inside of the bent portion with that of the existing accessory tile, thereby suppressing the manufacturing cost by making full use of the existing sagger.
[0023]
Further, according to the accessory tile dry manufacturing apparatus described in claim 2, the manufacturing method of claim 1 can be easily implemented.
[Brief description of the drawings]
FIGS. 1A to 1C are enlarged views of a main part showing a manufacturing process.
FIG. 2 is a front view showing a powder cutting plate and a tip of a mold convex portion overlapped with each other.
3 (a) to 3 (c) are perspective views of the accessory tile viewed from the back side.
4 (a) to 4 (c) are plan views of main parts showing a bent portion of the accessory tile.
FIGS. 5A to 5D are cross-sectional views illustrating a manufacturing process.
FIG. 6 is a perspective view showing a lower mold and a charger.
FIG. 7 is a perspective view showing a sagger.
[Explanation of symbols]
S: Pressure adjusting gap T: Tactile tile X: Flat plate portion Y: Bent portion Z: Clay Z1: Clay surface 1 ... Pressing means 2 ... Charger 3 ... Mold recess 4 ... V groove 5 ... Lower mold 6 ... Mold convex Part 7 ... Upper die 9 ... Powder cutting board 11 ... Expansion projection 12 ... Expansion depression

Claims (2)

A dry manufacturing method of compacting kneaded clay to produce an approximately L-shaped accessory tile,
Pressing means comprising: a lower mold having a mold recess substantially imitating an inverted accessory tile in a V-groove having an upper surface opening; and an upper mold having a substantially inverted triangular mold protrusion fitted into the mold recess. Use
The cut surface shape of the kneaded clay filled in the mold concave portion in the cut-off state, the portion of the upper mold convex portion corresponding to the flat plate portion of the accessory tile is in contact with the surface of the clay, and the mold convex portion is formed. The lowering amount from the time when the main surface of the mold projection contacts the surface of the kneaded material to the end of pressing between the portion corresponding to the bent portion of the accessory tile and the surface of the kneaded clay (hereinafter referred to as “pressing allowance”). ) Set so that there is a smaller pressure adjustment gap,
A dry type of a tile for a character tile, characterized in that excessive pressurization of the bent portion that can occur when the shape of the inside and outside of the bent portion of the role tile is arbitrarily set is reduced by the pressure adjustment gap and pressed. Production method. A dry manufacturing apparatus for manufacturing a substantially L-shaped accessory tile, comprising: a press unit for compacting the kneaded material, and a charger for supplying the kneaded material to the pressing unit,
The pressing means includes a lower mold having a mold recess substantially shaped like an inverted role tile in an open top V-shaped groove, and an upper mold having a substantially inverted triangular mold protrusion fitted into the mold recess. With
On the other hand, the charger has a powder form that has a plate shape in a shape that matches the V groove of the lower die and slides in the V groove to fill the mold recess into the mold recess in a sliding state, When the narrow tip of the upper mold projection is superimposed on the thin tip of the powder cutting plate, an extended projection is formed to project from the contour of the mold projection to the periphery. An apparatus for dry-manufacturing a tile for an accessory tile, wherein an expansion recess corresponding to the expansion protrusion of the powder cutting board is formed at the bottom, and the size of the expansion protrusion is smaller than the pressing allowance.

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