JPH0229316A - Manufacture of inside and outside connecting tubes for vehicle lamp - Google Patents
Manufacture of inside and outside connecting tubes for vehicle lampInfo
- Publication number
- JPH0229316A JPH0229316A JP63178034A JP17803488A JPH0229316A JP H0229316 A JPH0229316 A JP H0229316A JP 63178034 A JP63178034 A JP 63178034A JP 17803488 A JP17803488 A JP 17803488A JP H0229316 A JPH0229316 A JP H0229316A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- parison
- continuum
- molding
- molded
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 24
- 238000000071 blow moulding Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 12
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 14
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 239000000109 continuous material Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/004—Bent tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/24—Pipe joints or couplings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は新規な車輌用灯具の内外連絡チューブの製造方
法に関する。詳しくは、車輌用、例えば、自動車用の灯
具の水抜き孔や空気流通孔等に取着されるＵ字形状やコ
字形状（以下、これを総称してＵ字形状という）の連絡
チューブを安価に製造する方法を提供しようとするもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a novel connecting tube between the inside and outside of a vehicle lamp. In detail, we refer to connection tubes in the U-shape or U-shape (hereinafter collectively referred to as U-shape) that are attached to water drain holes, air circulation holes, etc. of vehicle lights, for example. The aim is to provide a method of manufacturing at low cost.
車輌用、例えば、自動車用の灯具においては、ランプボ
ディに連絡孔を形成し、この連絡孔を介して灯具内の水
抜きや曇りの除去を図るようになっている。しかし連絡
孔から雨水や塵埃等が灯具内に侵入する恐れがあり、こ
れを防止するために、略Ｕ字形状をした連絡チューブを
連絡孔に取着するようになっている。BACKGROUND ART In a lamp for a vehicle, for example, an automobile, a communication hole is formed in the lamp body, and water is drained from the lamp and fog is removed through the communication hole. However, there is a risk that rainwater, dust, etc. may enter the lamp through the communication hole, and to prevent this, a substantially U-shaped communication tube is attached to the communication hole.
ところで、従来は上記したような略Ｕ字形に屈曲した連
絡チューブを形成するのに５例えばＥＰＴゴムをプレス
成形するようになっていた。By the way, conventionally, to form a connecting tube bent into a substantially U-shape as described above, for example, EPT rubber was press-molded.
しかしながら、ゴム材料のプレス成形では生産性が悪く
、それだけ連絡チューブの生産コストが増大し、連絡チ
ューブの価格が高くなるという問題があった。However, press molding of rubber materials has a problem in that productivity is poor and the production cost of the connecting tube increases accordingly, making the connecting tube expensive.
本発明は前記従来技術の問題点に鑑みなされたもので、
その目的は車輌用１例えば自動車用の灯具の水抜き孔や
空気流通孔等に取着される連絡チューブを安価に製造す
ることができる方法を提供することにある。The present invention has been made in view of the problems of the prior art,
The purpose is to provide a method for manufacturing at low cost a connecting tube to be attached to a water drain hole, an air circulation hole, etc. of a vehicle lamp, for example, an automobile lamp.
〔問題点を解決するための手段および作用〕前記目的を
達成するために、本発明に係る車輌用灯具の内外連絡チ
ューブの製造方法においては、ブロー成形により、Ｕ字
形状チューブ成形体が端部を互いに連続させて左右交互
に配置された蛇行形状チューブ連続体を成形し、その後
このチューブ連続体をパリソンの軸方向に沿う方向およ
び隣接するＵ字形状チューブ成形体間にて切断して、各
Ｕ字形状チューブ成形体に分離する内外連絡チューブの
製造方法であって、前記チューブ連続体を、線対称な左
右一対のチューブ連続体が上端部および下端部において
それぞれ連通する並列チューブ連続体とするようにした
ものである。[Means and effects for solving the problem] In order to achieve the above-mentioned object, in the method for manufacturing an internal/external connecting tube for a vehicle lamp according to the present invention, a U-shaped tube molded body is formed by blow molding at the end thereof. are made continuous with each other to form a meandering tube continuum arranged alternately on the left and right, and then this tube continuum is cut in the axial direction of the parison and between adjacent U-shaped tube molded bodies to form each tube continuum. A method for producing an internal/external connecting tube that is separated into U-shaped tube moldings, wherein the tube continuum is a parallel tube continuum in which a pair of line-symmetric left and right tube continuums communicate at the upper end and the lower end, respectively. This is how it was done.
したがって本発明車輌用灯具の内外連絡チューブの製造
方法によれば、−度の成形で多数の連絡チューブを成形
することができ、連絡チューブの製造コストが低減され
る。Therefore, according to the method of manufacturing an internal/external connecting tube for a vehicle lamp according to the present invention, a large number of connecting tubes can be molded with a -degree molding, and the manufacturing cost of the connecting tubes can be reduced.
また複数のＵ字形状チューブ成形体の成形収縮に伴うチ
ューブ連続体としての捩れや曲がりは。Also, twisting and bending of a continuous tube body due to molding shrinkage of a plurality of U-shaped tube molded bodies.
左右の線対称形状のチューブ連続体同士で相殺しあうの
で、真っ直な並列チューブ連続体を成形でき、従って切
断やパリ取りが容易となる。Since the left and right linearly symmetrical tube continuums cancel each other out, a straight parallel tube continuum can be formed, which makes cutting and deburring easy.
次に、本発明車輌用灯具の内外連絡チューブ製造方法の
実施の一例を図面に基づいて説明する。Next, an example of an implementation of the method for manufacturing an internal/external connecting tube for a vehicle lamp according to the present invention will be described with reference to the drawings.
第１図は複数の内外連絡チューブが一体化されたチュー
ブ連続体をブロー成形する装置を示すもので、符号１は
ダイスであり、その中心部にダイスコア２が嵌合されて
おり、このダイス１とダイスコア２との間に溶融樹脂通
路３が形成され、この溶融樹脂通路３の下端開口部は下
から見て略円形をしている。またダイスコア２の中心を
貫通して空気通路４が形成され、この空気通路４の下端
にはエアーパイプ５が設けられている。また溶融樹脂通
路３は図示しない射出装置に接続されており、溶融樹脂
、例えば溶融ポリエチレン樹脂が射出装置によって溶融
樹脂通路３を通して下方に射出され、これによって下方
に延びる筒状のパリソン６が形成されるようになってい
る。Fig. 1 shows an apparatus for blow molding a tube continuous body in which a plurality of internal and external communication tubes are integrated. A molten resin passage 3 is formed between the die core 2 and the die core 2, and the lower end opening of the molten resin passage 3 has a substantially circular shape when viewed from below. Further, an air passage 4 is formed passing through the center of the die core 2, and an air pipe 5 is provided at the lower end of this air passage 4. Further, the molten resin passage 3 is connected to an injection device (not shown), and a molten resin, for example, molten polyethylene resin, is injected downward through the molten resin passage 3 by the injection device, thereby forming a cylindrical parison 6 extending downward. It has become so.
符号１０．２０は一対の成形金型であり、パリソン６を
挟んでパリソン６の軸方向に直交する方向に接離自在に
移動するように構成されている。Reference numerals 10 and 20 denote a pair of molding dies, which are configured to be movable toward and away from each other in a direction perpendicular to the axial direction of the parison 6 with the parison 6 in between.
そして金型１０，２０の対向する突合せ面には、成形面
１．２．２２が形成されている。Molding surfaces 1, 2, and 22 are formed on opposing abutting surfaces of the molds 10 and 20.
成形面１２．２２によって形成される金型のキャビティ
は、第４図を参照して後述するように、成形しようとす
るＵ字形状チューブの端部が互いに連続し、左右交互に
配置された蛇行形状チューブ連続体であって、互いに線
対称の左右のチューブ連続体３２．３４を上端部および
下端部において連通させた形状の並列チューブ連続体の
外周形状に整合する形状とされている。As will be described later with reference to FIG. 4, the mold cavity formed by the molding surface 12.22 has a meandering shape in which the ends of the U-shaped tube to be molded are continuous with each other and alternately arranged left and right. The shape matches the outer circumferential shape of a parallel tube continuum in which left and right tube continuums 32 and 34, which are axisymmetric with each other, are communicated at their upper and lower ends.
金型１０，２０の成形面１２．２２は、互いに対称形状
とされており、ここでは成形面１２についてのみ説明し
、成形面２２の説明は省略する。The molding surfaces 12, 22 of the molds 10, 20 are symmetrical with respect to each other, and only the molding surface 12 will be described here, and a description of the molding surface 22 will be omitted.
第２図は、成形金型１０の斜視図であり、成形面１２は
、大径水平凹部１３と小径垂直凹部１５とがコ字状形状
に蛇行して上下方向に延びる左側蛇行凹部１４と、右側
蛇行凹部１６とからなり、左右の蛇行凹部１４，１６は
互いに線対称形状とされるとともに、上端部１５および
下端部１７位置においてつながっている。FIG. 2 is a perspective view of the molding die 10, in which the molding surface 12 includes a left meandering recess 14 in which a large-diameter horizontal recess 13 and a small-diameter vertical recess 15 meander in a U-shape and extend in the vertical direction; The left and right meandering recesses 14 and 16 are symmetrical to each other and are connected at the upper end 15 and lower end 17 positions.
次に、本発明方法によるブロー成形の手順を、第１図お
よび第３図に基づいて説明する。Next, the procedure of blow molding according to the method of the present invention will be explained based on FIGS. 1 and 3.
まず第１図に示されるように、パリソン６が金型１０，
２０間に垂下されると、金型１０．２０が接近する方向
（第１図矢印方向）に移動し、第３図に示されるように
、パリソン６をピンチする。First, as shown in FIG.
20, the mold 10.20 moves in the approaching direction (in the direction of the arrow in FIG. 1) and pinches the parison 6, as shown in FIG.
次いでエアーパイプ５から第３図矢印に示されるように
、空気がパリソン６内に供給される。これによってパリ
ソン６は金型１０，２０の成形面１２．２２に抑圧密着
される。この状態において、図示しない冷却装置によっ
て金型１０，２０が冷却される。そして金型の冷却に伴
ってキャビティ内の樹脂が固化し、その後、金型１０，
２０を離間させて、キャビティ内の成形体を取り出す。Air is then supplied from the air pipe 5 into the parison 6 as shown by the arrow in FIG. As a result, the parison 6 is tightly pressed against the molding surfaces 12 and 22 of the molds 10 and 20. In this state, the molds 10 and 20 are cooled by a cooling device (not shown). As the mold cools, the resin in the cavity solidifies, and then the mold 10,
20 and take out the molded body from the cavity.
第４図および第５図において、符号３０はブロー成形に
より成形された並列チューブ連続体を含むブロー成形体
を示している。左右のチューブ連続体３２．３４は、Ｕ
字形状チューブ３２ａ、３４ａの端部が互いに連続し、
左右交互に配置された蛇行形状を呈し、互いに線対称と
なっている。In FIGS. 4 and 5, reference numeral 30 indicates a blow molded body including a continuous parallel tube body formed by blow molding. The left and right tube continuum 32.34 is U
The ends of the letter-shaped tubes 32a and 34a are continuous with each other,
They have a meandering shape, arranged alternately on the left and right, and are symmetrical to each other.
また左右のチューブ連続体３２．３４は、上端部および
下端部において互いに連通ずるとともに、両チューブ連
続体３２．３４の内側および外側にはパリ４０が付着し
て、ブロー成形体３０として一体となっている。そして
このブロー成形体３０は、その後、符号Ｑｉ、 Ｑ２．
０．、で示す縦方向位置にて切断され、次いでパリ取り
を行って、第６図に示すような連絡チューブ３２ａ （
３４ａ）が得られる。Further, the left and right tube continuum bodies 32,34 communicate with each other at the upper and lower ends, and a paris 40 is attached to the inside and outside of both tube continuum bodies 32,34, so that they are integrated as a blow-molded body 30. ing. This blow-molded body 30 is then given the symbols Qi, Q2.
0. The connecting tube 32a (
34a) is obtained.
なおブロー成形体３ｏの切断工程では、成形体を切断装
置の所定位置に位置決めしてセットし、縦方向（Ｑ□？
Ｑ２１ ａ、方向）に切断するものであるが、ブロー
成形体３０は捩れや曲がりや反りの無い略真っ直なもの
となっており、成形体３０の位置決めをスムーズに行う
ことができるとともに、正確な切断が可能となる。In the cutting process of the blow molded body 3o, the molded body is positioned and set at a predetermined position of the cutting device, and the molded body is cut in the vertical direction (Q□?
Q21 a, direction), the blow molded product 30 is substantially straight without twisting, bending, or warping, and the molded product 30 can be positioned smoothly and accurately. This allows for precise cutting.
ブロー成形体に含まれているチューブ連続体が一本の場
合、あるいはチューブ連続体が並列である場合であって
も、蛇行形状が線対称でない場合には、チューブ連続体
に成形収縮時の捩れや曲がりや反りなどが生じ、これに
起因して、ブロー成形体が捩れたり曲がったりあるいは
反り返ったりした形状となることがある。この為、切断
工程において、ブロー成形体の位置決めが戴しく、切断
作業に時間がかかり、同時に正確な切断もできないとい
う難点がある。しかるに前記したこのブロー成形方法で
は、左右の蛇行形状チューブ連続体３２．３４が線対称
であり、成形収縮に伴うチューブ連続体としての捩れれ
や曲がりや反りが互いに相殺しあうので、ブロー成形体
が捩れたり曲がったり反ったりするという不具合がなく
、スムーズなブロー成形体のセットおよび正確な切断が
可能となるという優れた効果がある。Even if there is only one continuous tube included in the blow-molded product, or even if the continuous tubes are arranged in parallel, if the meandering shape is not axisymmetric, the continuous tube may be twisted during molding shrinkage. This may cause the blow-molded product to have a twisted, bent, or warped shape. For this reason, in the cutting process, it is difficult to position the blow-molded body, the cutting operation takes time, and at the same time, accurate cutting is difficult. However, in this blow molding method described above, the left and right meandering tube continuums 32 and 34 are axisymmetric, and the twists, bends, and warpages of the tube continuum bodies due to molding shrinkage cancel each other out. There are no problems such as twisting, bending, or warping, and the excellent effect is that the blow-molded product can be smoothly set and accurately cut.
なおブロー成形体３０の切断工程およびパリ取り工程は
、縦方向に切断後、パリ取りを行っても、あるいは逆に
パリ取り後、縦方向に切断しても、さらにあるいは縦方
向切断と同時にパリ取りを行ってもよく、その手順はい
かなるものでもよい。The cutting process and the deburring process of the blow molded product 30 can be carried out either by cutting in the longitudinal direction and then deburring, or conversely, after removing the deburring and cutting in the longitudinal direction, or in addition or at the same time as cutting in the longitudinal direction. Any procedure may be used.
次に、前記本発明方法で製造した連絡チューブの実際の
使用態様について説明する。Next, the actual usage of the connecting tube manufactured by the method of the present invention will be explained.
前記本発明に係る方法で製造された連絡チューブは合成
樹脂製であり、従来のゴム製の連絡チューブでは問題と
されなかった取着部での回り止め手段や取着部からの脱
落防止手段が必要とされている。The connecting tube manufactured by the method according to the present invention is made of synthetic resin, and has a means for preventing rotation at the attachment part and a means for preventing it from falling off from the attachment part, which were not a problem with conventional rubber connecting tubes. is necessary.
連絡チューブは、灯具の水抜孔や空気流通孔が形成され
ているボスの先端部であるチューブ被取着部にチューブ
の一端開口部を被せるようにして取着されるが、チュー
ブの他端開口部を下方に位置するよう上下方向に延在す
るように配置されることが、水の侵入を防ぐという点か
ら最も望ましい。またボスのチューブ被取着部に取着さ
れた連絡チューブの他端側に外力が作用しても、チュー
ブ被取着部から抜は落ちないようにすることも必要であ
る。このような観点から連絡チューブの取着部における
回り止め手段および脱落防止手段を工夫することが必要
となる。The connecting tube is installed by placing one end of the tube over the tube attachment part, which is the tip of the boss where the water drain hole and air circulation hole of the lamp are formed. It is most preferable to extend vertically so that the lower part is located at the bottom in order to prevent water from entering. Furthermore, even if an external force acts on the other end of the communication tube attached to the tube attachment portion of the boss, it is also necessary to prevent the puller from falling from the tube attachment portion. From this point of view, it is necessary to devise a rotation prevention means and a drop-off prevention means at the attachment portion of the connecting tube.
第７図に示す回り止め手段は、連絡チューブ４２ａの開
口部４２ｂの湾曲側内方にブロー成形時に生じるパリ４
０（第４，５図参照）を利用してリブ４４を突出形成し
、ランプボディに突出形成されているボス５０先端のチ
ューブ被取着部５２に連絡チューブ４２ａを取着したと
きに、前記リブ４４をちょうど挟むように一対のストッ
パリブ５４を灯具裏面に突出形成させたものである。そ
して連絡チューブ４２ａが回転しようとしても。The anti-rotation means shown in FIG.
0 (see FIGS. 4 and 5) to protrude the rib 44, and when the connecting tube 42a is attached to the tube attachment part 52 at the tip of the boss 50 protrudingly formed on the lamp body, the above-mentioned A pair of stopper ribs 54 are formed to protrude from the back surface of the lamp so as to sandwich the ribs 44 between them. And even if the communication tube 42a tries to rotate.
リブ４４がストッパリブ５４にその動きを拘束されるの
で、連絡チューブの回転が防止される。第７図（ａ）、
（ｂ）は連絡チューブ取着状態の側面図および水平断面
図を示す、なおストッパリブ５４はボス５ｏの側面に突
出形成してもよい。Since the movement of the rib 44 is restrained by the stopper rib 54, rotation of the communication tube is prevented. Figure 7(a),
(b) shows a side view and a horizontal cross-sectional view of the connecting tube attached. Note that the stopper rib 54 may be formed to protrude from the side surface of the boss 5o.
第８図に示す回り止め手段は、ボス５０のチューブ被取
着部５２の外周に、軸方向に延びる一対の突条５３ａを
形成し、チューブ開口部４２ｂの内周に前記突条と係合
可能な縦スリット５３ｂを形成し、突条５３ａと縦スリ
ット５３ｂとの係合により、連絡チューブ４２ａの回転
を防止するようになっている。第８図（ａ）、（ｂ）は
チューブ被取着部の平面図および側面図、第８図（Ｃ）
。The anti-rotation means shown in FIG. 8 includes a pair of axially extending protrusions 53a formed on the outer circumference of the tube attachment portion 52 of the boss 50, and engaged with the protrusions on the inner circumference of the tube opening 42b. A possible vertical slit 53b is formed, and rotation of the communication tube 42a is prevented by engagement between the protrusion 53a and the vertical slit 53b. Figures 8(a) and 8(b) are a plan view and side view of the tube attachment part, Figure 8(C)
.
（ｄ）は連絡チューブの側面図及び底面図を示す。(d) shows a side view and a bottom view of the connecting tube.
以上の説明から明かなように、本発明に係る車輌用灯具
の内外連絡チューブの製造方法においては、ブロー成形
により、Ｕ字形状チューブ成形体が端部を互いに連続さ
せて左右交互に配置された蛇行形状チューブ連続体を成
形し、その後このチューブ連続体をパリソンの軸方向に
沿う方向および隣接するＵ字形状チューブ成形体間にて
切断して、各Ｕ字形状チューブ成形体に分離する内外連
絡チューブの製造方法であって、前記チューブ連続体を
、線対称な左右一対のチューブ連続体が上端部および下
端部にお゛いてそれぞれ連通する並列チューブ連続体と
するようにしたものである。As is clear from the above description, in the method for manufacturing the internal/external connecting tube for a vehicle lamp according to the present invention, U-shaped tube molded bodies are arranged alternately on the left and right sides with their ends continuous with each other by blow molding. Internal and external communication in which a serpentine tube continuum is molded, and then this tube continuum is cut along the axial direction of the parison and between adjacent U-shaped tube bodies to separate each U-shaped tube body. In the method of manufacturing a tube, the tube continuum is formed into a parallel tube continuum in which a pair of line-symmetric left and right tube continuum bodies communicate with each other at the upper and lower ends.
したがって−度の成形で多数の連絡チューブを成形する
ことができ、連絡チューブのコストが低減される。Therefore, a large number of connecting tubes can be molded in one molding process, and the cost of connecting tubes is reduced.
特に複数のＵ字形状チューブ成形体の成形収縮に伴うチ
ューブ連続体としての捩れや曲がりは、左右の線対称形
状のチューブ連続体同士で相殺しあうので、真っ直な並
列チューブ連続体を成形でき、切断工程やパリ取り工程
が容易となって、連絡チューブのコストがさらに低減さ
れる。In particular, twisting and bending of the tube continuum due to molding shrinkage of multiple U-shaped tube molded bodies is canceled out by the left and right line-symmetric tube continuums, so it is possible to form a straight parallel tube continuum. , the cutting process and the deburring process are facilitated, further reducing the cost of the connecting tube.
第１図は本発明方法の実施に使用する成形装置の断面図
、第２図は成形金型の成形面の斜視図、第３図は成形金
型のブロー成形時の断面図、第４図はブロー成形された
チューブ連続体の斜視図、第５図はブロー成形されたチ
ューブ連続体の切断位置を示す正面図、第６図は製造さ
れたＵ字形状連絡チューブの斜視図、第７図はおよび第
８図はそれぞれＵ字形状連結チューブの実際の使用態様
を示す図である。
６・・・パリソン、
１０．２０・・・成形金型、
１２．２２・・・成形面、
１４．１６・・・蛇行凹部、
３ｏ・・・ブロー成形体、
３２．３４・・・蛇行形状チューブ連続体、３２ａ、３
４ａ・・・Ｕ字形状連絡チューブ。
４０・・・パリ。
第１図Fig. 1 is a cross-sectional view of the molding apparatus used to carry out the method of the present invention, Fig. 2 is a perspective view of the molding surface of the mold, Fig. 3 is a cross-sectional view of the mold during blow molding, and Fig. 4 5 is a front view showing the cutting position of the blow-molded continuous tube body, FIG. 6 is a perspective view of the manufactured U-shaped connecting tube, and FIG. 7 is a perspective view of the blow-molded continuous tube body. 8 and 8 are diagrams respectively showing how the U-shaped connecting tube is actually used. 6... Parison, 10.20... Molding die, 12.22... Molding surface, 14.16... Meandering recess, 3o... Blow molded body, 32.34... Meandering shape Tube continuum, 32a, 3
4a...U-shaped connecting tube. 40...Paris. Figure 1
Claims (1)
形成し、このパリソンをその軸方向と直交する方向から
金型でピンチすると同時に、パリソン内に空気を供給し
て成形を行う、いわゆるブロー成形により、Ｕ字形状チ
ューブ成形体が端部を互いに連続させて左右交互に配置
された蛇行形状チューブ連続体を成形し、その後このチ
ューブ連続体をパリソンの軸方向に沿う方向および隣接
するＵ字形状チューブ成形体間にて切断して、各Ｕ字形
状チューブ成形体に分離する車輌用灯具の内外連絡チュ
ーブの製造方法であって、前記チューブ連続体は、線対
称な左右一対のチューブ連続体が上端部および下端部に
おいてそれぞれ連通する並列チューブ連続体とされたこ
とを特徴とする車輌用灯具の内外連絡チューブの製造方
法。(1) Molten synthetic resin is injected into a cylindrical shape to form a cylindrical parison, and this parison is pinched with a mold from a direction perpendicular to its axis, and at the same time air is supplied into the parison to form the parison. , by so-called blow molding, a serpentine tube continuum is formed in which U-shaped tube moldings are arranged alternately on the left and right with their ends continuous with each other, and then this tube continuum is formed in the axial direction of the parison and adjacently. A method for manufacturing an internal/external communication tube for a vehicle lamp, in which the inner and outer connecting tubes of a vehicle lamp are cut between U-shaped tube molded bodies and separated into U-shaped tube molded bodies, the tube continuum being separated into a pair of axially symmetric left and right tube bodies. 1. A method for manufacturing an internal/external connecting tube for a vehicle lamp, characterized in that the tube continuum is a parallel tube continuum that communicates at its upper end and lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63178034A JPH0790590B2 (en) | 1988-07-19 | 1988-07-19 | Method for manufacturing inner / outer communication tube of vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63178034A JPH0790590B2 (en) | 1988-07-19 | 1988-07-19 | Method for manufacturing inner / outer communication tube of vehicle lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0229316A true JPH0229316A (en) | 1990-01-31 |
| JPH0790590B2 JPH0790590B2 (en) | 1995-10-04 |
Family
ID=16041430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63178034A Expired - Lifetime JPH0790590B2 (en) | 1988-07-19 | 1988-07-19 | Method for manufacturing inner / outer communication tube of vehicle lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790590B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100441029B1 (en) * | 2002-01-23 | 2004-07-21 | 주식회사 제너럴 라이팅 | Manufacturing method of the back light lamp for the lamp |
| WO2020158558A1 (en) * | 2019-01-30 | 2020-08-06 | キョーラク株式会社 | Molding device and system for producing molded article |
| JP2020121448A (en) * | 2019-01-30 | 2020-08-13 | キョーラク株式会社 | Molding device |
| JP2020121450A (en) * | 2019-01-30 | 2020-08-13 | キョーラク株式会社 | Molding device |
| JP2021041640A (en) * | 2019-09-12 | 2021-03-18 | キョーラク株式会社 | Manufacturing system for molded product |
-
1988
- 1988-07-19 JP JP63178034A patent/JPH0790590B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100441029B1 (en) * | 2002-01-23 | 2004-07-21 | 주식회사 제너럴 라이팅 | Manufacturing method of the back light lamp for the lamp |
| WO2020158558A1 (en) * | 2019-01-30 | 2020-08-06 | キョーラク株式会社 | Molding device and system for producing molded article |
| JP2020121448A (en) * | 2019-01-30 | 2020-08-13 | キョーラク株式会社 | Molding device |
| JP2020121450A (en) * | 2019-01-30 | 2020-08-13 | キョーラク株式会社 | Molding device |
| US11890802B2 (en) | 2019-01-30 | 2024-02-06 | Kyoraku Co., Ltd. | Molding device and system for producing molded article |
| JP2021041640A (en) * | 2019-09-12 | 2021-03-18 | キョーラク株式会社 | Manufacturing system for molded product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0790590B2 (en) | 1995-10-04 |
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