JP3217686B2 - Tile base molding die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of a filling part of a clay filling space by a powder box in a dry tile body forming side view in which a tile body is formed by a forming press machine.

[0002]

2. Description of the Related Art Conventionally, a technique relating to the configuration of a mold in molding a tile base has been known. For example, Japanese Patent Publication No. 49-4521 and Japanese Utility Model Publication No. 4-32
No. 251 publication. In the conventional mold for forming a tile base, a problem has occurred as shown in FIGS. 5, 6 and 7. That is, in the above-mentioned conventional tile base molding die, when the tile after firing is inspected for quality, a black stripe pattern or a black portion is generated on the surface of the tile, and the texture of the tile after firing is generated. Had a significant adverse effect on When investigating the causes of the occurrence of the black stripes and black portions, the following points were found to be the causes.

[0003]

That is, a powder scraping plate 2 is provided over the width of the clay filling space D via a fixed bracket rod 7 at the tip of the powder box B in the traveling direction. The powder scraping plate 2 is configured to scrape and retreat the powder material piled up on the clay filling space D when the powder box B is retracted. However, the fine powder of the raw material powder stays between the powder scraping plate 2 and the powder box B, and when the fine powder K is brought back by the powder scraping plate 2 and retreats, It has been found that black stripes and black areas are generated by scattered roses on the tile base. At the tip of the powder measure B, the powder scraper 2 is forcibly driven to scrape the fine powder K of the raw material powder attached to the lower surface of the upper die 3 in the tile base molding die. Or the driven upper brush 1 is provided, and the fine powder K scraped off at the upper brush 1 is also dropped and retained between the powder scraping plate 2 and the powder box B. Was also one of the causes. An object of the present invention is to eliminate such disadvantages of the prior art and eliminate the occurrence of black bruises and stripes on the surface of the tile base.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. In claim 1, a powder box B reciprocating on a molding die is provided, and a powder scraping plate 2 is provided at an end of the powder box B.
In the configuration in which is attached, the tip of the powder box B moves on the frame mold A, and the tip of the powder box B is
And a fine powder falling space C for dropping the fine powder staying between them.

According to a second aspect of the present invention, in the tile base molding die, a shallow recess 6 is formed in a communicating state at a position adjacent to the tile-shaped forming hole of the frame die A and at a position before and after in the moving direction of the powder box B. It was established.

According to a third aspect of the present invention, in the tile base molding die according to the second aspect, a shallow concave portion 6 is formed in a portion of the frame die A.

[0007]

Next, an embodiment of the present invention will be described. FIG. 1 is a front sectional view showing an embodiment in which a fine powder falling space C is cut off at right angles to a frame die A in a tile base molding die of the present invention, and FIG. FIG. 3 is a front sectional view showing an embodiment in which the fine powder falling space C of the present invention is formed by cutting off an inclined surface.
FIG. 4 is a side view of a frame mold A similarly constituting a fine powder falling space C of the present invention, and FIG. 5 is a front view showing a conventional technique in which fine powder K stays between a powder scraping plate 2 and a powder box B. FIG. 6 is a front sectional view showing the prior art in which fine powder K staying between the powder scraping plate 2 and the powder box B is scattered on the raw material powder in the clay filling space D, and FIG. It is a front sectional view of the prior art which reciprocates to the position where the scraping plate 2 protrudes from the front end of the frame die A.

[0008] The conventional tile base molding die is configured as shown in FIGS. 5 and 6. That is, the powder measure B is pressed by the pneumatic or hydraulic cylinder 5 and reciprocates on the clay filling space D formed by the frame mold A and the lower mold 4. Then, the powder scraping plate 2 attached to the rear end of the powder box B at the time of retreating scrapes the heaping state of the raw material powder formed on the clay filling space D,
The fine powder K tends to stay in the space between the powder scraping plate 2 and the powder box B. When the powder scraping plate 2 retreats and scrapes the surface of the raw material powder, the clay filling space D The fine powder K is scattered on the surface of the raw material powder.

In particular, an upper brush 1 for cleaning the lower surface of the upper die 3 in the mold for forming a tile base and dropping the fine powder K is disposed above the powder scraping plate 2 at the tip of the powder box B. Therefore, there is a high possibility that the fine powder K on the lower surface of the upper die 3 dropped by the upper die brush 1 also falls and stays between the powder scraping plate 2 and the tip of the powder box B. As shown in FIG. 7, in order to prevent the fine powder K from staying between the powder scraping plate 2 and the powder box B and adversely affecting the texture of the tile base material, as shown in FIG. The position of the reciprocating stroke of the tip
It was necessary to reach the position where the frame A was removed.

As shown in FIG. 7, the stroke of the pneumatic or hydraulic cylinder 5 is increased in order to increase the reciprocating stroke of the powder box B so that the powder scraping plate 2 comes off the end of the frame die A. However, the time required for the reciprocating motion of the frame die A becomes longer, so that the waiting time of the molding press becomes longer.

In the present invention, as shown in FIGS. 1, 2, 3, and 4, a fine powder falling space C is formed in a frame die A in order to solve the above-mentioned disadvantages of the prior art. In the embodiment of FIG. 1, the fine powder falling space C formed at the end of the frame mold A is
This is avoided by forming the cut surface 8 at a right angle. Further, in the embodiment shown in FIG. 2, the oblique cut-off surface 9 is formed at the end of the frame die A to avoid the problem. Since the fine powder K falls on the cut surface 8 and the oblique cut surface 9, the fine powder K is not scattered on the raw material powder in the return process of the scraping plate 2.

FIG. 8 shows a conventional frame die A having a shallow recess 6.
FIG. 9 is a front cross-sectional view showing a state before the swelling state of the raw material powder is scraped off by the side plate 15 of the powder measure B in a case where no shallow concave portion 6 is provided. FIG. 10 is a view showing a state after the surface of the raw material powder has been scraped off by the side plate 15 of the basin B. FIG. 10 shows a configuration in which a shallow concave portion 6 is provided in the frame mold A as in the present invention.
5 is a view showing a state after the raw material powder has been scraped from the side plate 15 of FIG.

When the powder box B returns, the side plate 15 scrapes the surface of the raw material powder in a heaped state. In the clay filling space D, the scraping of the powder scraping plate 2 in the return stroke is started first. The side plate 15 of the powder measure B
Since the raw material powder is not scraped off and is the part where the raw material powder starts to be scraped first, the force is sufficiently applied to the powder scraping plate 2 in the scraping direction, and the downward force of the raw material powder is reduced. There is a tendency for the raw material powder to be cut deeper than the surface of the frame die A to form a concave portion or a sparse portion 13 of the raw material powder. Conversely, at the final position of the scraping of the raw material powder in the clay filling space D by the raw material powder, the raw material powder collected on the side before the scraping of the raw material powder is It tends to receive the pushing force from the end wall, leaving more raw material powder than before,
This tends to form the convex portion or the dense portion 14.

As described above, in the conventional clay filling space D, when the frame mold A is not formed with the shallow recesses 6, the recess or sparse portion is formed at the scraping start portion of the side plate 15 of the powder box B. 13 is formed, and a protrusion or a dense portion 14 is formed at the scraping end portion of the side plate 15 of the powder measure B. As described above, when the kneaded clay filling space D is pressed by the upper die 3 in a state where the concave or sparse portion 13 and the convex or dense portion 14 are generated, the pressing force of the raw material powder per area is different. The surface pattern may be uneven, or the texture of the tile may be adversely affected.

In the present invention, the portion where the concave portion or the sparse portion 13 or the convex portion or the dense portion 14 is generated is concentrated on the shallow concave portions 6 and 6 and the clay filling space D pressed by the upper mold 3 is formed. In this portion, the frame mold A is provided with shallow concave portions 6.6 so that the concave portions or the sparse portions 13 and the convex portions or the dense portions 14 do not occur.

[0016]

As described above, the present invention has the following advantages. In a configuration in which a powder box B that reciprocates on a molding die is provided and a powder scraping plate 2 is attached to the tip of the powder box B, the tip of the powder box B moves on the frame mold A as claimed in claim 1. Then, at the maximum protruding position, the fine powder falling space C for dropping the fine powder staying between the tip of the powder box B and the powder scraping plate 2 is formed. Since the fine powder K can be positively dropped in the fine powder falling space C, black stripes and scratches of the fine powder K formed on the tile base can be eliminated. Also,
If the moving stroke of the powder measure B is increased, the problem can be solved without forming the fine powder falling space C, but the time lag for reciprocating the powder measure B increases,
The time required for one stroke of the tile base forming press machine is prolonged, and the efficiency is reduced. The present invention solves such a problem by removing the cut surface 8 and the oblique cut surface 9.
By providing the frame type A, the problem could be easily solved.

According to a second aspect of the present invention, in the tile base molding die, a shallow concave portion 6 is formed in a communicating state at a position adjacent to the tile-shaped forming hole of the frame die A and at a position before and after in the moving direction of the powder box B. Since the side plate 15 of the powder measure B is provided in the return stroke of the powder measure B, when the raw material powder in the heaping state of the clay filling space D portion is scraped, a concave portion or a sparse portion 13 at an initial position, The convex portion or the dense portion 14 at the last position can be formed at the positions of the shallow concave portions 6.6, both of which are formed in the frame mold A, and the portion of the clay filling space D actually pressed by the upper mold 3 is formed. Since the concave portion or the sparse portion 13 and the convex portion or the dense portion 14 cannot be formed, the unevenness generated due to the difference in the pressing pressure on the tile surface can be eliminated, and the deterioration of the texture of the tile can be avoided.

According to the third aspect of the present invention, in the mold for forming a tile base according to the second aspect, since the shallow recessed portion 6 is formed in the portion of the frame die A, the shallow recessed portion 6.6 can be easily punched in the frame die A. Since it can be configured by setting and processing, it is possible to improve and use a conventionally used tile base molding die as it is, and it is possible to easily eliminate the problems of the tile base molding die. .

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment in which a fine powder falling space C is formed by cutting a frame die A at a right angle in a tile base molding die of the present invention.

FIG. 2 is a front sectional view showing an embodiment in which a fine powder falling space C is formed by cutting a frame die A into an inclined surface.

FIG. 3 is a plan view of a frame die A constituting a fine powder falling space C of the present invention.

FIG. 4 is a side view of a frame die A similarly constituting a fine powder falling space C of the present invention.

FIG. 5 is a front sectional view showing a conventional technique in which fine powder K stays between a powder scraping plate 2 and a powder box B.

FIG. 6 is a front sectional view showing a conventional technique in which fine powder K retained between the powder scraping plate 2 and the powder box B is scattered on the raw material powder in the clay filling space D.

FIG. 7 is a front sectional view of a conventional technique in which the powder scraping plate 2 is reciprocated to a position where the powder scraping plate 2 projects from the front end of the frame die A.

FIG. 8 is a front cross-sectional view showing a state before the swelling state of the raw material powder is scraped off by the powder scraping plate 2 when the shallow concave portion 6 is not provided in the conventional frame die A.

FIG. 9 is a drawing showing a state after the surface of the raw material powder has been scraped off by the powder scraping plate 2 when the conventional shallow recess 6 is not provided.

FIG. 10 is a view showing a state after the raw material powder is scraped off from the powder scraping plate 2 in a configuration in which a shallow concave portion 6 is provided in the frame mold A according to the present invention.

[Explanation of symbols]

 B Powder measure C Fine powder falling space D Clay filling space K Fine powder 1 Upper brush 2 Powder scraper 3 Upper die 4 Lower die 5 Pneumatic or hydraulic cylinder 6 Shallow recess 7 Fixed bracket rod 8 Cut-off surface 9 Oblique cut-off surface 13 Concave or sparse part 14 Convex or dense part 15 Side plate of powder measure

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-24509 (JP, A) JP-A-8-244024 (JP, A) JP-A-8-207037 (JP, A) JP-A-8-210 132428 (JP, A) JP-A-5-154827 (JP, A) JP-A-5-13704 (JP, U) JP-A-58-190108 (JP, U) JP-B-4-32251 (JP, B2) JP-B-49-4521 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 3/00-3/26

Claims (3)

(57) [Claims] 1. A powder box B that reciprocates on a molding die is provided.
In the configuration in which the powder scraper 2 is attached to the tip of the powder measure B,
That the tip of the powder box B moves on the frame mold A to form a fine powder falling space C for dropping the fine powder staying between the tip of the powder box B and the scraping plate 2 at the maximum projecting position. Characteristic tile base molding die. 2. In a mold for forming a tile base, a shallow recess 6 is formed in a communicating state at a position adjacent to a tile-shaped forming hole of a frame mold A and at a position before and after in a moving direction of a powder box B. Characteristic tile base molding die. 3. The mold for forming a tile base according to claim 2, wherein a shallow recess 6 is formed in the frame A.