JP4948355B2 - Manufacturing method of self-supporting flat roof tile - Google Patents

Manufacturing method of self-supporting flat roof tile Download PDF

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JP4948355B2
JP4948355B2 JP2007272100A JP2007272100A JP4948355B2 JP 4948355 B2 JP4948355 B2 JP 4948355B2 JP 2007272100 A JP2007272100 A JP 2007272100A JP 2007272100 A JP2007272100 A JP 2007272100A JP 4948355 B2 JP4948355 B2 JP 4948355B2
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大輔 石川
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新東株式会社
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Description

本発明は、自立型平板瓦の製造方法に関するものであって、特に、自立性を向上させた平板瓦に関する。   The present invention relates to a method for manufacturing a self-supporting flat roof tile, and more particularly to a flat roof tile with improved self-supporting properties.

平板粘土瓦の搬送時の自立性を改良した構造が、特許文献１の提案されている。これには、瓦本体の尻部端部に上下に突出する凸部を成形して、尻部を下にして縦立させ整列させるときその基底幅を拡幅することで、安定させて自立させることができるようにしたものである。   Patent Document 1 proposes a structure in which the self-supporting property at the time of transporting the flat clay tile is improved. For this purpose, a convex part that protrudes up and down is formed on the bottom end of the roof tile body, and when the vertical part is aligned vertically with the bottom part down, the base width is widened to make it stable and independent. It is made to be able to.

また、本発明出願人は、このようは自立型の平板瓦に生じる乾燥時の収縮歪みを研削、修正し、瓦の尻部端面の平面性を改良するようにした平板瓦の製造方法を特許文献２に提案している。この製造方法は、例えば、図４に例示する平板瓦本体１の尻部端面１１において、引掛け凸部１２の端面に第１小凸部１２ａを設け、また上辺縁部位に第２小凸部１３ａを設けて、それら第１小凸部１２ａと第２小凸部１３ａの突出高さを研削することにより調整してから、焼成するようにしたものである。   In addition, the applicant of the present invention has patented a method for manufacturing a flat roof tile, which grinds and corrects the shrinkage distortion during drying that occurs in such a free-standing flat roof tile, and improves the flatness of the end face of the roof of the roof tile. Proposed in Document 2. In the manufacturing method, for example, in the bottom end surface 11 of the flat roof tile body 1 illustrated in FIG. 4, the first small convex portion 12 a is provided on the end surface of the hook convex portion 12, and the second small convex portion is formed on the upper edge portion. 13a is provided, and the protrusion heights of the first small convex portion 12a and the second small convex portion 13a are adjusted by grinding, and then fired.

特開平１１−３６５２１号公報：各図面Japanese Patent Laid-Open No. 11-36521: Each drawing 特開２００２−８８９８１号公報：図２などJP 2002-88981 A: FIG. 2 and the like

ところで、引掛け凸部の端面に前記のような第１小凸部を設けるには、瓦生地をプレス成形するに当って、尻部端面を成形するための型面に予め相当形状の凹部を設けておき、その凹部に充填された粘土生地が、型はずし後に突出した第１小凸部を形成するよう構成されるのが生産技術上好ましい。このような第１小凸部成形用凹部は、裏面成形用型との境界部分に設定されるので、金型構造が複雑になるうえ、磨耗し易いので補修などメンテナンスに多くの手間と費用がかかるという問題があった。   By the way, in order to provide the first small convex portion as described above on the end surface of the hook convex portion, a concave portion having a corresponding shape is previously formed on the mold surface for forming the end portion end surface when press-molding the tile fabric. It is preferable in terms of production technology that the clay dough that is provided and filled in the concave portion is configured to form a first small convex portion that protrudes after mold removal. Since the first small convex portion forming recess is set at a boundary portion with the back surface forming die, the mold structure becomes complicated and wears easily, so that much labor and cost for maintenance such as repair are required. There was a problem that it took.

本発明は、上記の問題点を解決するためになされたものであり、金型構造が簡単になり、前記したようなメンテナンスを省略できる自立型平板瓦の製造方法を提供する。   The present invention has been made to solve the above-described problems, and provides a method for producing a self-supporting flat roof tile that simplifies the mold structure and can eliminate the above-described maintenance.

上記の問題は、成形、乾燥後に、成形体の尻側端面を部分的に平面研削機で研削する工程を備えた自立型平板瓦の製造方法であって、表型と裏型とからなるプレス成形型により粘土生地から、表面、裏面および裏面方向に突出する引掛け凸部を含む尻側端面を備えた成形体を成形するに際して、尻側端面を成形するための表型側面板の成形面を、表型主板面に対して９１度〜９８度の角度に開いて傾斜させた表型を用いて、成形体の引掛け凸部の尻側小端面を成形体の尻から外方向に突出させて成形するとともに、引掛け凸部以外の尻側端面に小凸部を成形することを特徴とする本発明の自立型平板瓦の製造方法によって、解決することができる。
また、本発明は、尻側端面を成形するための前記表型側面板の成形面に凹部を設けた表型を用いて、成形体の尻側端面の表側縁部から裏側縁部に向けて高さが低くなる勾配を持った小凸部を形成する前記形態に好ましく具体化される。 The above problem is a method for producing a self-supporting flat roof tile comprising a step of partially grinding a bottom end surface of a molded body with a surface grinder after molding and drying, and a press comprising a front mold and a back mold The molding surface of the front side plate for molding the bottom side end surface when molding a molded body having a bottom side end surface including hook projections protruding in the front surface, the back surface, and the back surface direction from the clay dough by the molding die , The bottom end surface of the hooked convex portion of the molded body protrudes outward from the bottom of the molded body using a table mold that is inclined at an angle of 91 to 98 degrees with respect to the main plate surface of the mold This problem can be solved by the method for producing a self-supporting flat roof tile according to the present invention, wherein the small convex portion is formed on the end side end surface other than the hook convex portion.
Further, the present invention uses a front mold in which a concave portion is provided on the molding surface of the front mold side plate for molding the bottom end face, from the front edge to the back edge of the bottom end face of the molded body. It is preferably embodied in the above-described form in which small convex portions having a gradient that decreases in height are formed.

さらに、本発明は、前記成形体の引掛け凸部の尻側小端面と、小凸部とを平面研削機で研削して、その尻側小端面と小凸部との先端とを結んだ平面と、成形体の主板面とがなす角度が予め定めた所定の角度になるよう調整する前記自立型平板瓦の製造方法として具体化される。   Further, the present invention is to grind the bottom end small end surface of the hooked convex portion of the molded body and the small convex portion with a surface grinder, and connect the bottom end small end surface and the tip of the small convex portion. The present invention is embodied as a method for manufacturing the self-supporting flat roof tile, wherein the angle formed by the flat surface and the main plate surface of the molded body is adjusted to a predetermined angle.

本発明の自立型平板瓦の製造方法は、このように、成形体の引掛け凸部の尻側小端面を成形体の主板面に対して所定角度に開いて成形することになるので、その引掛け凸部小端面を他の部分に比較して尻から外方向に自ずから突出させることになるから、成形体の尻側端面全体を研削する必要がなく研削工程で研削面積を少なくできる。また同時に、成形体の尻側端面の小凸部を研削することにより、焼成時の自立角度を容易に調整できる利点が得られるとともに、金型構造が簡単になり、磨耗する部分も少なくなるのでメンテナンスも容易になる利点が得られる。よって本発明は、従来の問題点を解消した自立型平板瓦の製造方法として、技術的価値はきわめて大なるものがある。   In this way, the manufacturing method of the self-supporting flat roof tile according to the present invention forms the hook-side small end surface of the hooked convex portion of the molded body at a predetermined angle with respect to the main plate surface of the molded body. Since the small end surface of the hooking convex portion is naturally protruded outward from the buttocks as compared with other portions, it is not necessary to grind the entire buttocks side end surface of the molded body, and the grinding area can be reduced in the grinding process. At the same time, grinding the small convex part on the end face on the bottom side of the molded product provides the advantage of easily adjusting the self-standing angle during firing, simplifies the mold structure, and reduces the number of parts that wear out. There is an advantage that maintenance is easy. Therefore, the technical value of the present invention is extremely high as a method for manufacturing a self-supporting flat roof tile that has solved the conventional problems.

次に、本発明の自立型平板瓦の製造方法に係る実施形態について、図１〜３，４、５〜７を参照しながら説明する。
先ず、本発明は、以下に詳述する成形体２の成形工程に続く乾燥工程後に、成形体２の尻側端面３を部分的に平面研削機（図示せず）で研削することによって、尻側端面３を下に頭２３を上にして安定して自立させて焼成することができる自立型平板瓦の製造方法に関する。そして、成形工程では、表型４と裏型５とからなるプレス成形型により粘土生地から、表面２１、裏面２２および裏面方向に突出する２箇所の引掛け凸部３３を含む尻側端面３を備えた成形体２を成形する点では、従来方法と基本的には同様である。 Next, an embodiment according to a method for manufacturing a self-supporting flat roof tile of the present invention will be described with reference to FIGS.
First, according to the present invention, after the drying process following the molding process of the molded body 2 described in detail below, the buttocks side end surface 3 of the molded body 2 is partially ground with a surface grinder (not shown), thereby The present invention relates to a method of manufacturing a self-supporting flat roof tile that can be fired while being stably self-supported with the side end face 3 facing down and the head 23 facing up. In the molding step, the bottom end face 3 including the hooking protrusions 33 projecting in the direction of the back surface 21, the back surface 22, and the back surface from the clay dough by the press mold composed of the front mold 4 and the back mold 5. In the point which shape | molds the provided molded object 2, it is the same as that of the conventional method fundamentally.

この表型４は、図２に示すように、成形体２の表面２１を成形するための表主板４１の両側に、尻側端面３を成形するための側面板４２と、頭部２３を成形するための側面板４４とが固定されて構成されている。 同様に、裏型５は、成形体２の裏面２２を成形するための裏主板５１の両側に、成形体２の両側端面を成形するための側面板５２、５３が固定されて構成されている。   As shown in FIG. 2, the table mold 4 is formed with a side plate 42 for forming the bottom end surface 3 and a head portion 23 on both sides of a front main plate 41 for forming the surface 21 of the molded body 2. A side plate 44 for fixing is fixed. Similarly, the back mold 5 is configured by fixing side plates 52 and 53 for forming both side end surfaces of the molded body 2 on both sides of a back main plate 51 for molding the back surface 22 of the molded body 2. .

そして、表型４と裏型５とは、上下に組み合せるときに、それぞれの側面板４２、４４と側面板５２、５３とが互い違いに組み合されて、その間に成形空間（キャビティ）が形成されるよう配置されていて、図３にしめすように、この成形空間に押し出し機から得られた平板状粘土生地を配置し、この表型４と裏型５とにより圧搾することによって成形体２を得ることができる。   When the front mold 4 and the back mold 5 are assembled vertically, the side plates 42 and 44 and the side plates 52 and 53 are alternately assembled to form a molding space (cavity) therebetween. As shown in FIG. 3, a flat clay dough obtained from an extruder is placed in this molding space, and the molded body 2 is squeezed with the front mold 4 and the back mold 5. Can be obtained.

なお、実際には、成形体２の表面２１および裏面２２などに造形されている凹凸形状などを成形するための凹凸型面が、表主板４１、側面板４２、４４および裏主板５１、側面板５２、５３のそれぞれに配設されているのであるが、この図２、３においては、説明を簡便にするため省略されている。   Actually, the concave and convex mold surfaces for molding the concave and convex shapes formed on the front surface 21 and the back surface 22 of the molded body 2 are the front main plate 41, the side plates 42 and 44, the back main plate 51, and the side plate. 52 and 53 are not shown in FIGS. 2 and 3 for simplicity of explanation.

そして、本発明の特徴とするところは、第１に、２箇所に設けられた成形体２の引掛け凸部３３、３３の尻側小端面３３ａ、３３ａを成形体の頭２３から尻２４方向に突出させて成形する点にあり、この尻側小端面３３ａ、３３ａを突出させるために、本発明での表型４は、尻側端面３を成形するための表型側面板４２の成形面４２ａを、表型主板４１面に対して９１度〜９８度の角度に開いて傾斜させた点がその要点となっている。   The first feature of the present invention is that the bottom end surfaces 33a, 33a of the hook projections 33, 33 of the molded body 2 provided at two locations are directed from the head 23 of the molded body to the bottom 24 direction. In order to project the bottom side end surfaces 33a and 33a, the front mold 4 in the present invention is formed by a molding surface of a front mold side plate 42 for molding the bottom end face 3 The main point is that 42a is opened and inclined at an angle of 91 to 98 degrees with respect to the surface of the main plate 41.

第２に特徴とするところは、引掛け凸部３３以外の尻側端面３に小凸部３４を成形する点にあり、図１の例では、引掛け凸部３３の両側に２箇所、計４箇所に小凸部３４を配置しているが、本発明では、これに限定されず、少なくとも１箇所、好ましくは左右に計２箇所配置するのがよい。
このように、成形体２の尻側端面３に小凸部３４を成形するには、図５に例示するように、表主板４１に固定された、尻側端面３を成形するための側面板４２の成形面４２ａに小凹部４３を設けることで達成できる。 The second characteristic is that the small convex portion 34 is formed on the end side end surface 3 other than the hooking convex portion 33. In the example of FIG. Although the small convex portions 34 are arranged at four places, the present invention is not limited to this, and at least one place, preferably a total of two places on the left and right sides, should be placed.
Thus, in order to form the small convex portion 34 on the bottom end surface 3 of the molded body 2, as illustrated in FIG. 5, a side plate for forming the bottom end surface 3 fixed to the front main plate 41. This can be achieved by providing a small recess 43 on the molding surface 42a of 42.

この場合、前記表型側面板４２の成形面４２ａに小凹部４３の凹形状は、図５，６、７に示す通り、成形体の尻側端面３の表側縁部近傍の突出部３４ａから裏側縁部近傍の平坦部３４ｂに向けて突出高さが小さくなる勾配面を持った小凸部３４を形成するように、表主板４１の裏面４１ａとの境界部分に深さが最も深い最凹部４３ａを設け、成形面４２ａと面一になる下方の平坦部４３ｂに向けて底面４３ｃが浅くなる凹形状とするのが好ましい。   In this case, the concave shape of the small recess 43 on the molding surface 42a of the front side plate 42 is as shown in FIGS. 5, 6 and 7 from the protrusion 34a near the front edge of the bottom end surface 3 of the molded body to the back side. The deepest concave portion 43a having the deepest depth at the boundary portion with the back surface 41a of the front main plate 41 so as to form a small convex portion 34 having a sloped surface whose projection height decreases toward the flat portion 34b in the vicinity of the edge portion. It is preferable to form a concave shape in which the bottom surface 43c becomes shallower toward the lower flat portion 43b that is flush with the molding surface 42a.

このような金型構造において、表裏型４、５は垂直方向にプレス操作されるので、小凹部４３の底面４３ｃの勾配が垂直（表主板４１の裏面４１ａに対して直角）の場合、図６、７に示されるように、小凸部３４が突出高さが尻側端面３に対して最大になる。さらに、最凹部４３ａが深くなるよう設定する（図８に示すように、底面４３ｃの勾配を変化させて最凹部４３ａを、平坦部４３ｂを基点とした垂直線４５（一点鎖線で表示）より深くする）と、底面４３ｃの勾配は表主板４１の裏面４１ａに対して直角以下の角度となるので、型はずし時の型の動きからみると、下方の平坦部４３ｂが成形された小凸部３４と干渉して押し潰すように作用すると考えられた。   In such a mold structure, since the front and back molds 4 and 5 are pressed in the vertical direction, when the gradient of the bottom surface 43c of the small recess 43 is vertical (perpendicular to the back surface 41a of the front main plate 41), FIG. 7, the protruding height of the small convex portion 34 is maximum with respect to the buttocks side end surface 3. Further, the deepest concave portion 43a is set to be deeper (as shown in FIG. 8, the gradient of the bottom surface 43c is changed to make the deepest concave portion 43a deeper than the vertical line 45 (indicated by a one-dot chain line) with the flat portion 43b as a base point. ), The slope of the bottom surface 43c becomes an angle that is equal to or less than a right angle with respect to the back surface 41a of the front main plate 41. Therefore, when viewed from the movement of the mold when the mold is removed, the small convex part 34 formed with the lower flat part 43b is formed. It was thought to act to crush by interfering with.

しかし、試験の結果、最凹部４３ａを平坦部４３ｂを基点とした前記垂直線４５より０．８mm深く設定しても支障がないことが分った。つまり、凹部４３により成形される小凸部３４は、型はずし時の型動作から想定される高さより高く成形され得るのである。その理由は、成形直後の成形体は、押し潰されてもその形状はある程度復元するという相応の粘弾性の性質を持っているからと思われる。   However, as a result of the test, it was found that there is no problem even if the most concave portion 43a is set 0.8 mm deeper than the vertical line 45 with the flat portion 43b as a base point. That is, the small convex portion 34 formed by the concave portion 43 can be formed higher than the height assumed from the mold operation when removing the mold. The reason seems to be that the molded body immediately after molding has a corresponding viscoelastic property that its shape is restored to some extent even when it is crushed.

かくして、本発明の自立型平板瓦の製造方法では、成形工程で得られる成形体２は、表型側面板４２の成形面４２ａを下方に所定の傾斜角度で開くことにより、引掛け凸部３３の尻側小端面３３ａを成形体の尻から外方向に突出させた状態で成形される。同時に、表型側面板４２の成形面４２ａに設けた小凹部４３によって、尻側端面３に前記形状の小凸部３４が成形されるのである。この小凸部３４の高さが、予想より０．８mmだけ高く成形できることも分った。   Thus, in the method for producing a self-supporting flat roof tile according to the present invention, the molded body 2 obtained in the molding step is formed by opening the molding surface 42a of the front side plate 42 downward at a predetermined inclination angle, thereby hooking convex portions 33. The butt-side small end surface 33a is molded in a state of protruding outward from the butt of the molded body. At the same time, the small convex portion 34 having the above-mentioned shape is formed on the bottom end surface 3 by the small concave portion 43 provided on the molding surface 42 a of the front side plate 42. It has also been found that the height of the small convex portion 34 can be formed by 0.8 mm higher than expected.

このように本発明によれば、表型側面板４２の成形面４２ａに傾斜角度を与えることで引掛け凸部３３の尻側小端面３３ａを突出させることができるので、型の方に突出部成形用凹部を省略できるから、金型構造が簡単になり、磨耗箇所も少なくて済むようになり、金型の製作コストやメンテナンスコストも低減できるという利点が得られる。   As described above, according to the present invention, the bottom end surface 33a of the hooking convex portion 33 can be projected by giving an inclination angle to the molding surface 42a of the front side plate 42. Since the molding concave portion can be omitted, the mold structure is simplified, the number of wear points is reduced, and there are advantages that the manufacturing cost and maintenance cost of the mold can be reduced.

なお、本発明では、表型側面板４２の成形面４２ａの前記した傾斜角度を９１〜９８度としたのは、９１度未満では、尻側小端面３３ａ、３３ａの突出高さが少ないので、成形誤差以下となり、平面研削機による研削効率の向上に寄与しないから好ましくないからであるが、９３度以上の場合がその効果が十分に発揮できるので、より好ましい。
また、９８度超えの場合は、尻側小端面３３ａ、３３ａの突出高さが過大となり、平面研削機による研削効率を低下させるからである。 In the present invention, the angle of inclination of the molding surface 42a of the front side plate 42 is set to 91 to 98 degrees because, if it is less than 91 degrees, the projecting height of the bottom small end faces 33a and 33a is small. This is because it is not preferable because it is less than the molding error and does not contribute to the improvement of the grinding efficiency by the surface grinding machine, but the case of 93 degrees or more is more preferable because the effect can be sufficiently exhibited.
Further, when the angle exceeds 98 degrees, the protrusion height of the bottom end small end surfaces 33a and 33a becomes excessive, and the grinding efficiency by the surface grinding machine is lowered.

こうようにして得た成形体２を乾燥した後に、成形体２の２箇所の引掛け凸部３３の尻側小端面３３ａと、複数個の小凸部３４との突出面を平面研削機で研削し、その引掛け凸部の尻側小端面３３ａと小凸部３４との研削面とを結んだ平面と、成形体２本体とがなす角度が予め定めた所定の角度、例えば９０±3度の範囲内の角度になるよう調整する工程を含む自立型平板瓦の製造方法が実施できるのである。かくして、本発明によれば、焼成時に成形体を焼成台車上に自立整列させるときに、最も安定した自立角度を選択することができる利点も得られるのである。   After drying the molded body 2 thus obtained, the bottom side end face 33a of the two hooking convex portions 33 of the molded body 2 and the projecting surfaces of the plurality of small convex portions 34 are obtained by a surface grinding machine. A predetermined angle, for example, 90 ± 3, is defined by the angle formed between the flat surface obtained by grinding and connecting the ground surface of the bottom-side small end surface 33a of the hooking convex portion and the small convex portion 34 and the main body of the molded body 2. The manufacturing method of the self-supporting flat roof tile including the process adjusted so that it may become the angle within the range of a degree can be implemented. Thus, according to the present invention, it is possible to obtain an advantage that the most stable self-standing angle can be selected when the compacts are self-aligned on the firing cart during firing.

本発明により得られる瓦成形体を説明するための要部斜視図。The principal part perspective view for demonstrating the roof-molding body obtained by this invention. 本発明の金型を説明するため、開放した表型、裏形の状態を示す要部斜視図。The principal part perspective view which shows the state of the open front mold | type and back form, in order to demonstrate the metal mold | die of this invention. 本発明の金型の動きを説明するため、表型、裏形の位置関係を示す側面図。The side view which shows the positional relationship of a surface type | mold and a back shape in order to demonstrate the motion of the metal mold | die of this invention. 従来の瓦成形体を説明するための要部斜視図。The principal part perspective view for demonstrating the conventional roof-molding body. 本発明の表型側の小凹部を示す、斜め下方から仰ぎ見た要部斜視図。The principal part perspective view which looked up from the diagonally downward direction which shows the small recessed part by the side of the surface type of this invention. 本発明の成形体の引掛け凸部尻側小端面と、小凸部とを同一面上に表現し表型、裏形の位置関係を概念的に示す側断面図。The sectional side view which expresses the positional relationship of a table | surface type | mold and a back shape conceptually expressing the hook convex part bottom end small end surface and small convex part on the same surface of the molded object of this invention. 本発明の成形体の小凸部を説明するための要部斜視図。The principal part perspective view for demonstrating the small convex part of the molded object of this invention. 図６の変形例を説明するための要部拡大断面図。The principal part expanded sectional view for demonstrating the modification of FIG.

符号の説明Explanation of symbols

２：成形体、２１：表面、２２：裏面、２３：頭
３：尻側端面、３３：引掛け凸部、３３ａ：尻側小端面、３４：小凸部、３４ａ：突出部、３４ｂ：平坦部
４：表型、４１：表主板、４１ａ：裏面、４２：側面板、４２ａ：成形面、４３：小凹部、４３ａ：最凹部、４３ｂ：平坦部、４３ｃ：底面、４４：側面板、４５：垂直線
５：裏型、５１：裏主板、５２：側面板、５３：側面板 2: molded body, 21: front surface, 22: back surface, 23: head 3: bottom end surface, 33: hook projection, 33a: bottom small end surface, 34: small projection, 34a: projection, 34b: flat Part 4: front plate, 41: front main plate, 41a: back surface, 42: side plate, 42a: molding surface, 43: small recess, 43a: most recessed portion, 43b: flat portion, 43c: bottom surface, 44: side plate, 45 : Vertical line 5: Back mold, 51: Back main plate, 52: Side plate, 53: Side plate

Claims (3)

成形、乾燥後に、成形体の尻側端面を部分的に平面研削機で研削する工程を備えた自立型平板瓦の製造方法であって、表型と裏型とからなるプレス成形型により粘土生地から、表面、裏面および裏面方向に突出する引掛け凸部を含む尻側端面を備えた成形体を成形するに際して、尻側端面を成形するための表型側面板の成形面を、表型主板面に対して９1度〜９８度の角度に開いて傾斜させた表型を用いて、成形体の引掛け凸部の尻側小端面を成形体の尻から外方向に突出させて成形するとともに、引掛け凸部以外の尻側端面に小凸部を成形することを特徴とする自立型平板瓦の製造方法。   A method for producing a self-supporting flat roof tile comprising a step of partially grinding a bottom end surface of a molded body with a surface grinder after molding and drying, wherein a clay dough is formed by a press mold comprising a front mold and a back mold. From the front surface, the back surface, and the molding surface of the side surface plate for molding the bottom side end surface when molding the molded body having the bottom side end surface including the hooking convex portion protruding in the back surface direction, the front surface main plate Using a table mold that is open and inclined at an angle of 91 to 98 degrees with respect to the surface, the bottom end face of the hooked convex portion of the molded body is projected outward from the bottom of the molded body and molded. A method for producing a self-supporting flat roof tile, wherein a small convex portion is formed on an end side end surface other than the hook convex portion. 尻側端面を成形するための前記表型側面板の成形面に凹部を設けた表型を用いて、成形体の尻側端面の表側縁部から裏側縁部に向けて高さが低くなる勾配を持った小凸部を形成する請求項１に記載の自立型平板瓦の製造方法。   Gradient that decreases in height from the front edge of the bottom end face of the molded body toward the back edge using a front mold provided with a recess on the molding surface of the front mold side plate for molding the bottom end face The method for manufacturing a self-supporting flat roof tile according to claim 1, wherein a small convex portion having a protrusion is formed. 前記成形体の引掛け凸部の尻側小端面と、小凸部とを平面研削機で研削して、その尻側小端面と小凸部との先端とを結んだ平面と、成形体の主板面とがなす角度が予め定めた所定の角度になるよう調整する請求項２に記載の自立型平板瓦の製造方法。   Grinding the bottom side small end face of the hooked convex part of the molded body and the small convex part with a surface grinder, and connecting the bottom side small end surface and the tip of the small convex part, The method for producing a self-supporting flat roof tile according to claim 2, wherein the angle formed by the main plate surface is adjusted to a predetermined angle.
JP2007272100A 2007-10-19 2007-10-19 Manufacturing method of self-supporting flat roof tile Expired - Fee Related JP4948355B2 (en)

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JPH0619543Y2 (en) * 1988-02-01 1994-05-25 みのわ窯業株式会社 Clay roof tiles
JPH0267104A (en) * 1988-09-01 1990-03-07 Kosumitsuku:Kk Method for molding tile material and mold therefor
JP2002046072A (en) * 2000-08-02 2002-02-12 Goei Seisakusho:Kk Grinding wheel tool and method of manufacturing it
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