JPH0360651B2 - - Google Patents
Info
- Publication number
- JPH0360651B2 JPH0360651B2 JP58203933A JP20393383A JPH0360651B2 JP H0360651 B2 JPH0360651 B2 JP H0360651B2 JP 58203933 A JP58203933 A JP 58203933A JP 20393383 A JP20393383 A JP 20393383A JP H0360651 B2 JPH0360651 B2 JP H0360651B2
- Authority
- JP
- Japan
- Prior art keywords
- septic tank
- mold
- nozzle
- molding material
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は地中に埋設されて使用される浄化槽の
製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing a septic tank that is used while being buried underground.
合併処理浄化槽を含む大型浄化槽は、第１図に
示すように円筒状の浄化槽本体１を横置きとし、
両端開口に鏡板２，２を取付けて形成されてい
る。そして、この浄化槽Ａが地中に埋設された際
には第２図に示すように本体１の底部が上部分に
比して土圧、水圧等により強い外圧力Ｐを受け易
いものであるが、従来の浄化槽本体１の肉厚は一
様に形成されており、そのため本体１の上部にか
かる圧力は小さいにもかかわらず本体１の底部に
かかる圧力に耐えうる下部の肉厚と同じように形
成してあり、そのため本体１の上部分が必要以上
に厚肉となつていて製造コストが高くついている
という欠点があつた。
A large septic tank including a combined treatment septic tank has a cylindrical septic tank main body 1 placed horizontally as shown in Fig. 1.
It is formed by attaching mirror plates 2, 2 to openings at both ends. When this septic tank A is buried underground, as shown in Figure 2, the bottom part of the main body 1 is more susceptible to strong external pressure P due to earth pressure, water pressure, etc. than the upper part. The wall thickness of the conventional septic tank body 1 is uniform, and therefore, although the pressure applied to the top of the body 1 is small, the thickness of the bottom part is the same as that of the bottom part, which can withstand the pressure applied to the bottom part of the body 1. Therefore, the upper part of the main body 1 is thicker than necessary, resulting in high manufacturing costs.
本発明は上記の点に鑑みて成されたものであつ
て、外圧に耐え、しかも安価に製造することので
きる浄化槽の製造法を提供することを目的とする
ものである。
The present invention has been made in view of the above points, and it is an object of the present invention to provide a method for manufacturing a septic tank that can withstand external pressure and can be manufactured at low cost.
本発明は円筒状の成形型６内にノズル７を挿入
し、成形型６を周方向に回転させながらノズル７
より成形材料８を成形型６の内面に吹付けて浄化
槽Ａを成形するにあたつて、初めはノズル７より
成形材料８を均一に吹付け、その後、浄化槽Ａの
内周面の下部が上部より厚肉となるよう成形型６
の内面に成形材料８を間欠的に吹付けることを特
徴とする浄化槽の製造法により上記目的を達成し
たものである。
In the present invention, a nozzle 7 is inserted into a cylindrical mold 6, and the nozzle 7 is inserted while rotating the mold 6 in the circumferential direction.
When spraying the molding material 8 onto the inner surface of the mold 6 to form the septic tank A, the molding material 8 is first sprayed uniformly from the nozzle 7, and then the lower part of the inner circumferential surface of the septic tank A becomes the upper part. Molding mold 6 to make it thicker
The above object has been achieved by a method for manufacturing a septic tank, which is characterized by intermittently spraying molding material 8 onto the inner surface of the septic tank.
以下本発明を実施例により詳述する。浄化槽Ａ
を構成する円筒状の浄化槽本体１の成形法はフイ
ラメントワインデング（FW）法、遠心成形法、
回転成形法等の機械成形法を採用することができ
るが、ここでは回転成形法について説明する。第
３図に示すように円筒状の成形型６内にノズル７
を挿入し、成形型６を一定速度で回転させながら
成形型６の内面にノズル７よりポリエステル樹脂
とガラス繊維等の成形材料８を吹付けてローラで
押え、その後樹脂を硬化させて円筒パイプの浄化
槽本体１を成形するものである。その際、初めは
ノズル７より成形材料８を成形型６の内面に均一
に吹付けることによつて本体１の内周面の上部の
肉厚（本体の最低肉厚）に相当する厚さの成形材
料を成形型６の内面に全面に亘つて塗布するもの
であり、その後成形型６の回転に同調させてノズ
ル７から吹付けを間欠的に行ない本体１の下部の
肉厚を上部に比して厚くするものである。すなわ
ち第４図ａで示すように本体１の下部Ｂがノズル
７の吹付け位置にきた時にノズル７より成形材料
８を吹付けるようにし、その後成形型６の回転に
伴つて本体１の上部Ｃがノズル７の吹付け位置に
きた時にはノズル７の吹付けを止め、再び成形型
６の回転により本体１の下部Ｂがノズル７の吹付
け位置にきた時にはノズル７より成形材料８を吹
付けるものである。このようにして第５図のよう
な耐圧強度が必要とされる下部の肉厚を上部に比
して大きくした本体１を成形し、本体１の両端開
口に鏡板２，２を取付けて浄化槽を形成するので
ある。図中３はマンホール口、４は厚肉部、５は
薄肉部である。 The present invention will be explained in detail below with reference to Examples. Septic tank A
The molding method for the cylindrical septic tank body 1 that constitutes the main body 1 is the filament winding (FW) method, the centrifugal molding method,
Although a mechanical molding method such as a rotational molding method can be employed, the rotational molding method will be described here. As shown in FIG. 3, a nozzle 7 is placed inside a cylindrical mold 6.
is inserted, and while rotating the mold 6 at a constant speed, a molding material 8 such as polyester resin and glass fiber is sprayed onto the inner surface of the mold 6 through a nozzle 7 and pressed down with a roller.Then, the resin is cured to form a cylindrical pipe. This molds the septic tank body 1. At that time, the molding material 8 is first sprayed uniformly onto the inner surface of the mold 6 from the nozzle 7 to create a thickness corresponding to the upper wall thickness of the inner peripheral surface of the main body 1 (minimum wall thickness of the main body). The molding material is applied to the entire inner surface of the mold 6, and then sprayed intermittently from the nozzle 7 in synchronization with the rotation of the mold 6, so that the thickness of the lower part of the main body 1 is compared to the upper part. This is to make it thicker. That is, as shown in FIG. 4a, when the lower part B of the main body 1 comes to the spraying position of the nozzle 7, the molding material 8 is sprayed from the nozzle 7, and then as the mold 6 rotates, the upper part C of the main body 1 is sprayed. When the material reaches the spraying position of the nozzle 7, the spraying from the nozzle 7 is stopped, and when the lower part B of the main body 1 comes to the spraying position of the nozzle 7 by rotating the mold 6 again, the molding material 8 is sprayed from the nozzle 7. It is. In this way, the main body 1 shown in Fig. 5, in which the thickness of the lower part where pressure resistance is required is larger than that of the upper part, is formed, and the end plates 2, 2 are attached to the openings at both ends of the main body 1 to form a septic tank. It forms. In the figure, 3 is a manhole opening, 4 is a thick part, and 5 is a thin part.
しかしてこのようにして形成される浄化槽Ａは
第１図で示したように横置きとして地中に埋設さ
れるもので、本体１の下部の肉厚を上部の肉厚に
比して大きく形成してあるために、本体１の底部
分の耐圧強度を上部分に比して強くすることがで
き、本体１の底部が上部に比して強く作用する土
圧や水圧等の外圧に対して十分耐えうることがで
きるものである。また、本体１の上部に作用する
外圧は小さいために本体１の上側の肉厚を小さく
したとしても十分耐えうることができ、成形材料
を減らすことができるものである。 However, the septic tank A formed in this way is laid horizontally and buried underground as shown in Fig. 1, and the lower part of the main body 1 is made thicker than the upper part. Therefore, the pressure resistance of the bottom part of the main body 1 can be made stronger than that of the upper part, and the bottom part of the main body 1 can withstand external pressures such as earth pressure and water pressure that act more strongly than the upper part. It is something that can be endured. Further, since the external pressure acting on the upper part of the main body 1 is small, it can withstand sufficient pressure even if the upper wall thickness of the main body 1 is reduced, and the amount of molding material can be reduced.
上記のように本発明は、浄化槽の内周面の下部
の肉厚が上部より厚肉となるように成形型の内面
に成形材料を吹付けるようにしたので、本体の各
部位に作用する外圧力に合せて本体の肉厚を設定
することができ、不必要以上に上部の肉厚を厚く
する必要がなく安価に浄化槽を製造することがで
きるものであり、しかも初めはノズルより成形材
料を均一に吹付け、その後、浄化槽の内周面の下
部が上部より厚肉となるように成形型の内面に成
形材料を間欠的に吹付けるから、円筒状の成形型
内にノズルを挿入し、成形型を周方向に回転させ
ながらノズルより成形材料を成形型の内面に吹付
けて浄化槽を成形するにあたつて、成形型側の回
転速度は成形初期も成形終期も略一定の回転速度
でよく、比較的大型となる成形型を回転させる装
置を定速回転構成となすことができ、装置を簡素
化できるという利点がある。
As described above, in the present invention, the molding material is sprayed onto the inner surface of the mold so that the lower part of the inner circumferential surface of the septic tank is thicker than the upper part. The wall thickness of the main body can be set according to the pressure, and there is no need to make the upper wall thicker than necessary, making it possible to manufacture a septic tank at a low cost.Moreover, it is possible to manufacture the septic tank at a low cost by using the molding material from the nozzle in the beginning. The material is sprayed uniformly, and then the molding material is intermittently sprayed onto the inner surface of the mold so that the lower part of the inner peripheral surface of the septic tank is thicker than the upper part.Insert the nozzle into the cylindrical mold. When forming a septic tank by spraying molding material onto the inner surface of the mold from a nozzle while rotating the mold in the circumferential direction, the rotation speed on the mold side is approximately constant both at the beginning of molding and at the end of molding. This has the advantage that a device for rotating a mold, which is often relatively large, can be configured to rotate at a constant speed, and the device can be simplified.
第１図は浄化槽の全体斜視図、第２図は従来例
の説明図、第３図は本発明の一実施例の要部斜視
図、第４図ａ，ｂ，ｃは同上の作用説明図、第５
図は同上の断面図である。
１は浄化槽本体、２は鏡板、６は成形型、７は
ノズル、８は成形材料、Ａは浄化槽である。
Fig. 1 is an overall perspective view of a septic tank, Fig. 2 is an explanatory view of a conventional example, Fig. 3 is a perspective view of essential parts of an embodiment of the present invention, and Figs. 4 a, b, and c are explanatory views of the same operation. , 5th
The figure is a sectional view of the same as above. 1 is a septic tank main body, 2 is an end plate, 6 is a mold, 7 is a nozzle, 8 is a molding material, and A is a septic tank.
Claims (1)
を周方向に回転させながらノズルより成形材料を
成形型の内面に吹付けて浄化槽を成形するにあた
つて、初めはノズルより成形材料を均一に吹付
け、その後、浄化槽の内周面の下部が上部より厚
肉となるように成形型の内面に成形材料を間欠的
に吹付けることを特徴とする浄化槽の製造法。1. When molding a septic tank by inserting a nozzle into a cylindrical mold and spraying the molding material onto the inner surface of the mold while rotating the mold in the circumferential direction, the molding material is initially sprayed from the nozzle. A method for manufacturing a septic tank, which comprises uniformly spraying the molding material, and then intermittently spraying the molding material onto the inner surface of a mold so that the lower part of the inner peripheral surface of the septic tank is thicker than the upper part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20393383A JPS6096417A (en) | 1983-10-31 | 1983-10-31 | Manufacture of purificatory cistern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20393383A JPS6096417A (en) | 1983-10-31 | 1983-10-31 | Manufacture of purificatory cistern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096417A JPS6096417A (en) | 1985-05-30 |
| JPH0360651B2 true JPH0360651B2 (en) | 1991-09-17 |
Family
ID=16482091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20393383A Granted JPS6096417A (en) | 1983-10-31 | 1983-10-31 | Manufacture of purificatory cistern |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096417A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111890615B (en) * | 2020-07-29 | 2021-09-10 | 康东亮 | Full-automatic no waste material type gel piece production facility of intelligence |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57100024A (en) * | 1980-12-15 | 1982-06-22 | Matsushita Electric Works Ltd | Manufacture of septic tank |
-
1983
- 1983-10-31 JP JP20393383A patent/JPS6096417A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6096417A (en) | 1985-05-30 |
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