JP2617354B2 - Forming method of waste land for character tile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for forming a waste tile for a special purpose tile.

[Conventional technology]

Eaves tiles, sleeve tiles,
There are nosori tiles, crown tiles, etc. If further subdivided, eaves tiles, such as Manto tiles, single character tiles, Manto arabesque tiles, Manto Tomoe tiles, etc. are widely known, and small sleeve tiles, large sleeve tiles as sleeve tiles There is something called.

These forms and types do not substantially change from the forms and types of the accessory tile to which the present invention is directed (see FIGS. 1 to 6).

Among these tiles, eaves tiles and sleeve tiles, which are the object of the present invention, are different from girder tiles and flat tiles, as is known, and are usually suspended at right angles to one side of the flat main body of the tile. Since the “accessory portion” is provided as a portion that has been made, that is, a portion used for a certain purpose, the form is complicated. Therefore, the forming process of the rough lands is conventionally performed twice.

As a first step, first, rough forming is performed to obtain an approximate form, and as a second step, main forming is employed (see Japanese Patent Application Laid-Open No. 57-34907).

[Problems to be solved by the invention]

However, in the conventional primary molding method, FIGS.
As shown in the figure, the boundary between the presumed part 52 and the presumed part 54 of the tile roof main body of the waste land 50 is usually formed by an upper die 56 and a lower die 58 which are manufactured by following a right angle or an acute angle. Molding, in other words, rough molding.

Accordingly, with reference to the drawings of FIGS. 16 to 18, the clay 60 located at the boundary between the accessory portion scheduled portion 52 and the role tile main body scheduled portion 54 at the time of rough forming is a soft clay containing moisture. Although the clay 60 is high in nature, the clay 60 is forced to flow through the molds 56 and 58 due to the pressurizing action in the rough molding dies 56 and 58. Was inevitably obstructed by the corners of the roughly formed dies 56 and 58 provided at right angles or acute angles.

That is, the pressure stress tends to be dispersed at the outer portion of the boundary between the two, and the stress tends to be concentrated at the inner portion.

In other words, wrinkles 62 and cracks often occur on the inside, and cracks 64 often occur on the outside.

For this reason, referring to the drawings in FIGS. 17 and 18, the surface of the rough land adjacent to the portion X where the clay 60 flows and the portion Y where the fluidity is poor flows into the waste land by the portion where the clay 60 flows. It has the effect of being taken in. Note that, in FIG. 17, a thin hatched portion Z in the vertical direction of the clay 60 shows a part of the clay for convenience of explanation of the flow of the clay near the boundary.

In the industry, this effect is called "entanglement", but due to the entrapment, there is a problem that tends to increase or decrease the amount of clay distribution at the boundary, and there is a problem that cracks tend to occur. Even if it is carried out, as a result of the insufficient pre-process, problems often occur in the quality of the product.

In addition, a release agent such as petroleum is applied to the unfinished tile for waste tile 50 before molding so that the waste land for tile tile 50 is easily released from the mold. In such a case, there is an inconvenient problem that the release agent enters the crack. For this reason, there is a disadvantage that cracks and wrinkles cannot be eliminated even after the main molding is performed.

The present invention has been made in view of the problems of the prior art, and has as its object to formally regulate the dispersion of the pressing stress during rough molding and to reduce excessive stress concentration. By dispersing the clay, the uniform distribution of clay at the boundary between the planned part of the part and the part of the part of the tile is expected to be uniform, and at the same time, the formation of waste tile for the part of the tile that will suppress the occurrence of cracks and wrinkles The aim is to provide high quality tiles.

[Means for solving the problem]

The basic configuration of the present invention is a molding method for performing press molding by two molding steps for molding of a waste tile for accessory tiles,
A method for forming a waste tile for a special purpose tile, comprising: performing a primary molding by a curved shape at a boundary between a predetermined part of a special purpose tile and a predetermined part of a special purpose tile body in a waste area for a special purpose tile, and then performing a secondary molding. It is.

〔Example〕

 Examples will be described in detail with reference to the drawings.

Prior to describing the configuration of the present invention, the configuration and types of the accessory tile described in this specification will be clarified.

The type and structure of the accessory tile are basically the same as the conventional products, but the types shown in FIGS. 1 to 4 are eaves tiles of the accessory tile and are shown in FIG. Example is Manto tile
10, Fig. 2 is a one-character tile 12, Fig. 3 is a Manto arabesque tile 14, 14
The figure shows Mantomo tile 16.

The examples shown in FIGS. 5 and 6 show another type of sleeve tile as the accessory tile. FIG. 5 shows a small sleeve tile 18 and FIG. 6 shows a large sleeve tile 20.

All of these tiles are different from flat tiles and cross tiles, and are usually composed of a flat tile tile main body part 22 and a tile part 24 vertically suspended from one side of the tile tile main body part 22 at right angles. Have been.

In addition, Manto tiles for eaves 12, Manto arabesque tiles 14 and Manto Tomoe tiles
In 16, a circular bulge called so-called “manju 26” is provided on one side of the accessory portion 24.

As described above, the term is not necessarily established as the accessory tile main body portion 22, but a tile provided with the accessory portion 24, which is referred to as "hanging" regardless of the presence or absence of 26, is used in this specification. It is called a roof tile.

Of course, there is a form of this accessory part 24 in which a so-called hanging is provided on the left side or the right side of the cross tile for roofing a gable roof (gable) like a sleeve tile. This will be explained as a concept of a role tile.

In the present invention, the waste tile for the tile is basically formed into a rough form corresponding to the form of the expected tile by the upper mold 28 and the lower mold 30 by primary molding by press molding, and subsequently primary molded. The wasteland molded article 44 is formed by the secondary molding.

The details of this point will be described with reference to FIGS. 7 to 9. The upper mold 28 and the lower mold 30 manufactured in accordance with the ideal form of the primary waste tile for the accessory tile are basically the same as the conventional method. The upper die has a portion corresponding to the accessory tile main body portion 22 and the accessory portion 24 of the accessory tile, that is, the outer boundary portion 32 and the inner boundary portion 34 of the two form a curved surface. A mold 28 and a lower mold 30 are prepared (both of these molds are referred to as a wasteland primary molding mold).

Therefore, referring to FIG. 10 and FIG. 11, the primary molding die for these waste lands, the vicinity 40 of the inner part between the accessory part scheduled portion 36 and the accessory tile main body scheduled portion 38 in the accessory tile wasteland, and The outer boundary area 42 is roughly formed in a curved shape following the curved surface form of the outer boundary part 32 and the inner boundary part 34 of the rough land primary forming die.

Thus, the form of the first formed wasteland molded article 44 is generally formed in a shape similar to that of an accessory tile product, and the intended portion of the accessory tile main body
The shapes of the accessory portion 38 and the presumed portion portion 36 are formed so as to approximate the shape of the accessory tile main body portion 22 and the accessory portion 24 of the completed accessory tile.

In this case, as shown in FIG. 12, the boundary between the accessory tile main body planned portion 38 and the accessory portion planned portion 36 is such that the clay 46 at the boundary portion is a curved surface shape of the upper mold 28 and the lower mold 30. Will flow naturally within the mold following the outer boundary part 32 and the inner boundary part 34 in which the pattern is drawn.

For this reason, the clay distribution at the boundary becomes uniform without causing the problems seen in the prior art, and stress concentration and dispersion phenomenon due to local pressing do not occur, so that wrinkles and cracks do not occur. A primary wasteland molded product is obtained (No. 10
(See Figures to 12).

After obtaining a primary wasteland molded article having a configuration such as an ideal clay distribution by the above-described pretreatment, secondary molding is performed so that this preferred primary wasteland molded article becomes the next ideal molded article for an accessory tile. By performing the so-called main molding, a molded article for a role tile that is ideal can be obtained.

Therefore, in the subsequent steps, as in the prior art, a “insertion” step is performed as the so-called finishing of a molded article, dried, and then baked to obtain a product.

In this specification, the term "predetermined portion of the accessory tile body" is used.
Is the part that becomes the main body of the tile when the wasteland is completed as a product, and the `` planned part of the role tile '' is the same as the part of the role tile when it is completed as a product Is designated.

〔The invention's effect〕

The present invention has the following advantages because of the above configuration.

When performing the rough forming of the waste tile for the role tile, the boundary between the planned portion of the role tile and the planned portion of the role tile main body is formed into a curved surface shape,
The clay near the boundary between the two described above flows at the time of pressure molding, but the rough molding primary molding die has a curved surface portion. It smoothly adapts to the curved surface formed on the surface.

Therefore, there is no variation in the clay distribution near the above-mentioned boundary of the waste tile for the role of tile for a special purpose.

Further, the clay near the boundary is subjected to pressure stress, but flows smoothly, so that the stress distribution acts uniformly inside and outside the vicinity of the boundary of the role-use wasteland, so that cracks and wrinkles are less likely to occur.

Therefore, since a molded article which has been subjected to the main molding in such a waste area for a tile roof is ideal, a product having good quality can be obtained.

[Brief description of the drawings]

1 to 6 are perspective views of a roof tile, FIG. 7 is a perspective view of an upper mold and a lower mold, FIG. 8 is a sectional view of an upper mold, FIG. 9 is a sectional view of a lower mold, and FIG. Fig. 10 is a surface perspective view of a primary wasteland molded product, and Fig. 11
FIG. 10 is a rear perspective view of FIG. 10, FIG. 12 is an enlarged sectional view of a main part in a primary wasteland molding state, FIGS. 13 to 18 show a prior art, FIG. 13 is a perspective view of wasteland, FIG. FIG. 14 is a perspective view of a primary wasteland forming base, FIG. 15 is a perspective view of a secondary wasteland forming base, FIG.
16 is an enlarged cross-sectional view of a main part of the primary wasteland molding, FIG. 17 is a cross-sectional view of a main part showing a state before pressurization at the time of primary wasteland molding, and FIG. 18 is a cross-sectional view of a main part of the primary wasteland molding at the time of pressurization. It is. (Explanation of the reference numerals of the main parts) 36: scheduled part of the accessory part 38: scheduled part of the accessory tile body

Claims (1)

(57) [Claims] 1. A molding method for performing press molding of a rough tile for a role tile in two molding steps, wherein a boundary between a predetermined portion of a role tile and a predetermined portion of a role tile main body in the rough tile for a role tile is curved. A method of forming a waste tile for a tile for a character tile, comprising performing a primary molding according to a shape, and then performing a secondary molding.