JPH0319050B2 - - Google Patents
Info
- Publication number
- JPH0319050B2 JPH0319050B2 JP17759782A JP17759782A JPH0319050B2 JP H0319050 B2 JPH0319050 B2 JP H0319050B2 JP 17759782 A JP17759782 A JP 17759782A JP 17759782 A JP17759782 A JP 17759782A JP H0319050 B2 JPH0319050 B2 JP H0319050B2
- Authority
- JP
- Japan
- Prior art keywords
- tank body
- dividing
- mold
- inner diameter
- hollow portion
- 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
Links
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000005336 cracking Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、注入口部を備えた合成樹脂製の燃料
タンクの製造方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a synthetic resin fuel tank equipped with an injection port.
従来、この種の燃料タンクを製造するにあたつ
ては、タンク本体に対応する中空部を分割して形
成する成形型の分割面に、加熱軟化せしめたホー
ス状の合成樹脂の筒体を押圧、挾持し、この筒体
に空気を圧入してタンク本体を形成して、冷却、
固化し、成形型を分割してタンク本体を取り出し
ていた。しかるに、タンク本体には、一般に注入
口部が突出して設けられ、しかも、この注入口部
の外径部には、キヤツプが螺合するためのおねじ
が設けられているので、タンク本体と同時に、注
入口部を形成せしめると、この注入口部が成形型
から抜き出すことができない。このため、別途に
製作した注入口部を、タンク本体の成形時に１体
に固着せしめていたが、この母材が互に接着しに
くく亀裂を生ずるおそれがあり、また工程が多く
原価が高くなる等の欠点があつた。 Conventionally, when manufacturing this type of fuel tank, a hose-shaped synthetic resin cylinder that has been softened by heating is pressed onto the dividing surface of a mold that is formed by dividing a hollow part that corresponds to the tank body. , and pressurize air into this cylindrical body to form the tank body for cooling.
After it solidified, the mold was divided and the tank body was removed. However, the tank body is generally provided with a protruding filler port, and the outer diameter of the filler port is provided with a male thread for the cap to be screwed into, so that it can be inserted into the tank body at the same time. Once the injection port is formed, the injection port cannot be removed from the mold. For this reason, the injection port part, which was manufactured separately, was fixed into one body when forming the tank body, but this base material is difficult to adhere to each other and there is a risk of cracking, and there are many steps, which increases the cost. There were other drawbacks.
本発明は、注入口部に対応して下端を開口する
内径面を備えた入れ子を、分割面と直交する方向
に中空部の内方から着脱自在に嵌合し、この分割
面に、加熱軟化せしめたホース状の合成樹脂の筒
体を偏平に押圧、挾持し、この筒体に空気を圧入
して中空部および内径面に内方から押圧して成形
し、冷却、固化してのち、入れ子とともにタンク
本体を取り出し、さらに入れ子を取り外すことに
より、ねじ付の注入口部を備えた燃料タンクを、
いわゆるブロー成型によつて製作することを可能
とし、また、注入口部を完全に１体化して亀裂を
生ずるおそれがなく、しかも工程少なく製作容易
な燃料タンクの製造方法を提供しようとするもの
である。 In the present invention, a nest having an inner diameter surface opening at the lower end corresponding to the injection port is removably fitted from inside the hollow part in a direction perpendicular to the dividing plane, and the nest is heated and softened on the dividing plane. A hose-shaped synthetic resin cylinder is pressed flat and clamped, air is forced into the cylinder and pressed from the inside into the hollow part and inner diameter surface to form the cylinder, cooled and solidified, and then inserted into the cylinder. By taking out the tank body and removing the nest, a fuel tank with a threaded filler port can be installed.
The purpose of the present invention is to provide a method for manufacturing a fuel tank that can be manufactured by so-called blow molding, has an injection port completely integrated into one body, has no risk of cracking, and is easy to manufacture with fewer steps. be.
以下、図面により本発明の一実施例について詳
細な説明を行なう。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
図において、１は金属板の成形型で、上型３と
下型５とに分割され、タンク本体７の外形に対応
する中空部９が分割形成されている。上型３の中
空部９の底面には、金属製の入れ子１１が分割面
１３と直交する方向に中空部９の内方から着脱自
在に嵌合している。入れ子１１の内径部は注入口
部１５の外径部に対応して形成され、ねじ１７が
設けられている。１９は下型５の中空部９の底面
に、分割面１３と直交する方向に中空部９の内方
から着脱自在に嵌合する入れ子で、内径部は排出
口部２１の外径部に対応して形成され、環状の突
起２３に対応する環状の溝部２５が設けられてい
る。入れ子１９は排出口２１の軸心線を含む分割
面２７によつて分割されている。 In the figure, reference numeral 1 denotes a molding die made of a metal plate, which is divided into an upper mold 3 and a lower mold 5, and a hollow part 9 corresponding to the outer shape of a tank body 7 is formed separately. A metal nest 11 is removably fitted into the bottom surface of the hollow part 9 of the upper mold 3 from inside the hollow part 9 in a direction perpendicular to the dividing surface 13. The inner diameter of the nest 11 is formed to correspond to the outer diameter of the injection port 15, and a screw 17 is provided. 19 is a nest that is removably fitted to the bottom of the hollow part 9 of the lower mold 5 from inside the hollow part 9 in a direction perpendicular to the dividing surface 13, and the inner diameter part corresponds to the outer diameter part of the discharge port part 21. An annular groove 25 corresponding to the annular projection 23 is provided. The nest 19 is divided by a dividing surface 27 that includes the axis of the discharge port 21 .
上述の上型３と下型５との間に加熱軟化せしめ
たホース状の合成樹脂の筒体を偏平にして押圧、
挾持し、この筒体に空気を圧入する。空気圧入の
手段は通常用いられる装置と同じであるので、こ
こに詳細な説明を省略する。空気を圧入された筒
体は膨張し、中空部９および入れ子１１，１９の
内径面に沿つて押圧されるとともに、冷却されて
固化し、タンク本体７が形成される。つぎに、上
型３、下型５を分離し、固化したタンク本体７を
取り出すと、入れ子１１，１９はそれぞれ注入口
部１５、排出口部２１の嵌合したまま取り出され
る。入れ子１１はねじ１７に沿つて回動すること
により取り外し、また入れ子１９は分割面２７に
おいて分割して取り外す。最後に、注入口、排出
口を切削して開口するものである。 Between the upper mold 3 and the lower mold 5 described above, a hose-shaped synthetic resin cylinder that has been softened by heating is flattened and pressed;
Clamp it and pressurize air into this cylinder. The means for injecting air is the same as a commonly used device, so a detailed explanation will be omitted here. The cylindrical body press-fitted with air expands and is pressed along the inner diameter surfaces of the hollow portion 9 and the nests 11 and 19, and is cooled and solidified to form the tank body 7. Next, when the upper mold 3 and the lower mold 5 are separated and the solidified tank body 7 is taken out, the nests 11 and 19 are taken out with the injection port 15 and the discharge port 21 still fitted, respectively. The nest 11 is removed by rotating along the screw 17, and the nest 19 is separated at the dividing surface 27 and removed. Finally, the inlet and outlet are opened by cutting.
本発明は請求の範囲に記載のとおりの燃料タン
クの製造方法であるから、別体の注入口部、排出
口部を接着する必要がなく、したがつて、作業容
易で、製作能率を向上することができ、しかも亀
裂を生ずるおそれがない。また、外周にねじを設
けた注入口部を備えた燃料タンクをブロー成型に
よつて安価に製作することを可能とするものであ
る。 Since the present invention is a method of manufacturing a fuel tank as described in the claims, there is no need to glue separate inlet and outlet parts, and therefore the work is easy and production efficiency is improved. Moreover, there is no risk of cracking. Further, it is possible to inexpensively manufacture a fuel tank having an injection port provided with a thread on the outer periphery by blow molding.
なお、本発明は前述の実施例に限定されるもの
ではなく、他の態様においても実施しうるもので
ある。また、請求の範囲に示す符号は本発明の技
術的範囲を限定するものではない。 It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.
第１図は本発明に係る成形型の側断面図であ
る。
（図面の主要な部分を表わす符号の説明）、１
……成形型、７……タンク本体、９……中空部、
１１……入れ子、１３……分割面、１５……注入
口部、１７……ねじ、２１……排出口部。
FIG. 1 is a side sectional view of a mold according to the present invention. (Explanation of symbols representing main parts of drawings), 1
... Molding mold, 7 ... Tank body, 9 ... Hollow part,
DESCRIPTION OF SYMBOLS 11... Nest, 13... Dividing surface, 15... Inlet part, 17... Screw, 21... Outlet part.
Claims (1)
割面１３によつて分割して形成する成形型１の前
記中空部９の上面に、外周にねじ１７を設けた円
筒状の注入口部１５に対応して下端を開口する内
径面を備えた１体の入れ子１１を、前記分割面１
３と直交する方向に前記中空部９の内方から着脱
自在に嵌合し、前記分割面１３に加熱軟化せしめ
たホース状の合成樹脂の筒体を偏平に押圧、挾持
せしめる第１工程と、前記押圧、挾持された筒体
に空気を圧入して前記中空部９および前記内径面
に内方から押圧して前記タンク本体７及び注入口
部１５を形成して冷却、固化せしめる第２工程
と、前記成形型１を分割して入れ子１１とともに
タンク本体７を取り出す第３工程と、前記入れ子
１１をタンク本体７から取外す第４工程とよりな
る燃料タンクの製造方法。1. A cylindrical injection port 15 with a screw 17 provided on the outer periphery is provided on the upper surface of the hollow portion 9 of the mold 1, which is formed by dividing the hollow portion 9 corresponding to the tank body 7 by a horizontal dividing surface 13. A single nest 11 having an inner diameter surface opening at the lower end corresponding to the dividing surface 1
a first step of removably fitting from the inside of the hollow portion 9 in a direction perpendicular to 3, and pressing and holding a hose-shaped synthetic resin cylinder softened by heat on the dividing surface 13 flatly; a second step of pressurizing air into the pressed and clamped cylindrical body to press it against the hollow part 9 and the inner diameter surface from the inside to form the tank body 7 and the inlet part 15, and cool and solidify it; , a method for manufacturing a fuel tank comprising: a third step of dividing the mold 1 and taking out the tank body 7 together with the insert 11; and a fourth step of removing the insert 11 from the tank body 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17759782A JPS5967019A (en) | 1982-10-12 | 1982-10-12 | Preparation of fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17759782A JPS5967019A (en) | 1982-10-12 | 1982-10-12 | Preparation of fuel tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967019A JPS5967019A (en) | 1984-04-16 |
| JPH0319050B2 true JPH0319050B2 (en) | 1991-03-14 |
Family
ID=16033773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17759782A Granted JPS5967019A (en) | 1982-10-12 | 1982-10-12 | Preparation of fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967019A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6319453B1 (en) * | 1994-07-25 | 2001-11-20 | Sprayex, Inc. | Method of making a multiple neck spray bottle |
-
1982
- 1982-10-12 JP JP17759782A patent/JPS5967019A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5967019A (en) | 1984-04-16 |
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