JP3275102B2 - Container blow molding method - Google Patents

Container blow molding method

Info

Publication number
JP3275102B2
JP3275102B2 JP16167792A JP16167792A JP3275102B2 JP 3275102 B2 JP3275102 B2 JP 3275102B2 JP 16167792 A JP16167792 A JP 16167792A JP 16167792 A JP16167792 A JP 16167792A JP 3275102 B2 JP3275102 B2 JP 3275102B2
Authority
JP
Japan
Prior art keywords
mouth
parison
container
wall
mold
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 - Fee Related
Application number
JP16167792A
Other languages
Japanese (ja)
Other versions
JPH06143393A (en
Inventor
功 木村
博 竹川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyoraku Co Ltd
Original Assignee
Kyoraku Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyoraku Co Ltd filed Critical Kyoraku Co Ltd
Priority to JP16167792A priority Critical patent/JP3275102B2/en
Publication of JPH06143393A publication Critical patent/JPH06143393A/en
Application granted granted Critical
Publication of JP3275102B2 publication Critical patent/JP3275102B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • 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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
    • 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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2021—Inserts characterised by the material or type
    • B29C2049/2026—Neck portions
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、樹脂製のタンクやボト
ルなど、口部を有る容器を製造する容器のブロー成形方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for blow molding a container for producing a container having a mouth, such as a resin tank or a bottle.

【０００２】[0002]

【従来の技術】従来、ブロー成形される樹脂タンク本体
に、ブロー成形中にチューブを融着し、ブロー成形完了
後にチューブの内孔を塞いでいるパリスン壁を切除し
て、樹脂タンク本体に開口したチューブを一体に取り付
けた樹脂タンク、およびそのブロー成形手段は、実開昭
５８−１８５５３５号公報に記載されているように、知
られている。2. Description of the Related Art Conventionally, a tube is fused to a resin tank main body to be blow-molded during blow molding, and after the blow molding is completed, a parison wall closing an inner hole of the tube is cut off to open the resin tank main body. A resin tank having a tube integrally attached thereto and a blow molding means therefor are known as described in Japanese Utility Model Laid-Open Publication No. 58-185535.

【０００３】従来の樹脂タンクのブロー成形手段によれ
ば、図５に示すように、分割形式の金型ａのキャビテイ
ｂに、樹脂タンクｃの口部となる口部材ｄを設置してブ
ロー成形するが、口部材ｄは開口した筒状のものである
から、ブロー成形時にパリスンｅが口部材ｄの内面に入
り込んで溶着するとともに、口部を塞ぐパリスン壁ｆが
形成され、ブロー成形完了後に口部を塞いでいるパリス
ン壁ｆを、ドリルを用いて切除して口部を開口する後加
工が施される。ｇはその切除部分である。According to the conventional blow molding means for a resin tank, as shown in FIG. 5, a mouth member d serving as a mouth portion of a resin tank c is installed in a cavity b of a divided mold a to perform blow molding. However, since the mouth member d is an open tubular member, the parison e enters the inner surface of the mouth member d during the blow molding and is welded, and a parison wall f closing the mouth is formed. The paris wall f closing the mouth is cut off using a drill, and post-processing is performed to open the mouth. g is the cut portion.

【０００４】[0004]

【発明が解決しようとする課題】ところで、上記のよう
に口部に形成されるパリスン壁を、ドリルを回転して切
除する際には、パリスン壁のみが押圧されるので、その
応力が口部材の樹脂タンク本体に対する溶着境界面を離
す方向に作用して、境界面が剥離するおそれがある。ま
た、口部に形成されるパリスン壁は、ドリルによる切削
時の応力を受け止めるのに十分な剛性を有していないの
で、切削時にパリスン壁が不規則に撓み、ドリルの先端
が滑って、切除端面に削り過ぎ、偏芯、ブレが生じ、切
端面の寸法除精度に劣るうえ、切除端面が鋸歯状になっ
たり粗雑面となって、平滑性に劣るという問題がある。By the way, when a parison wall formed at the mouth as described above is cut by rotating a drill, only the parison wall is pressed, so that the stress is applied to the mouth member. Acts in a direction to separate the welding boundary surface with respect to the resin tank body, and the boundary surface may be peeled off. In addition, since the parison wall formed at the mouth does not have sufficient rigidity to receive the stress during cutting by the drill, the parison wall flexes irregularly during cutting, and the tip of the drill slips, resulting in a cut. There is a problem in that the end face is excessively cut, eccentricity and blurring occur, the dimensional accuracy of the cut end face is inferior, and the cut end face becomes serrated or rough, resulting in poor smoothness.

【０００５】本発明は、上記のような従来の問題点の解
消を図り、容器に対する口部の溶着強度を損なわず、口
部の開口端面の寸法精度が高く、かつ平滑面に容易に加
工することができ、容器の成形後にブロー孔を塞ぐ後工
程を必要としない容器のブロー成形方法を提供すること
を目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, does not impair the welding strength of the mouth portion to the container, has high dimensional accuracy of the opening end surface of the mouth portion, and is easily processed into a smooth surface. Can be used to close the blow holes after molding the container
It is an object of the present invention to provide a method for blow molding a container which does not require any special process.

【０００６】[0006]

【課題を解決するための手段】本発明は、上記目的を達
成するため、次の手段を案出した。すなわち、本発明に
係る容器のブロー成形方法は、分割形式の金型を開放し
た状態で、容器の口部を構成する口部材としてその開口
部を塞ぐとともにブローピンの挿入孔を設けてある隔壁
を有するものを金型のキャビテイに設置し、可塑化され
たパリスンを金型間に配置して金型を閉鎖し、次いで、
口部材の隔壁に設けてあるブローピンの挿入孔からブロ
ーピンをパリスンに刺し込み、圧力流体を吹き込んでパ
リスンを膨張して容器の形状に成形するとともに口部材
を溶着し、かつ口部材の隔壁とパリスンによる成形壁と
を溶着して積層部分を形成し、次いで、金型を開放して
成形品を取り出し、口部材の隔壁とパリスンの成形壁と
の積層部分を除去して口部を開口するものである。According to the present invention, the following means have been devised to achieve the above object. That is, in the container blow molding method according to the present invention, in a state in which the divided mold is opened, the partition having the opening for the blow pin is provided while closing the opening as a mouth member constituting the mouth of the container. Place the having in the mold cavity, place the plasticized parison between the molds and close the mold, then
Blow through the insertion hole of the blow pin provided in the partition
Piercing the pin into the parison, blowing the pressurized fluid to expand the parison to form the shape of the container, welding the mouth member, and welding the partition wall of the mouth member and the wall formed by the parison. After forming the laminated portion, the mold is opened to take out the molded product, and the laminated portion of the partition wall of the mouth member and the molded wall of Paris is removed to open the mouth portion.

【０００７】[0007]

【作用】本発明に係る容器のブロー成形方法によれば、
容器の口部を構成する口部材としてその開口部を塞ぐ隔
壁を有するものを用いて、かつその隔壁に設けてあるブ
ローピンの挿入孔からブローピンをパリスンに刺し込ん
でブロー成形するので、口部の隔壁の部分に、パリスン
による成形壁が溶着した積層部分が形成される。このた
め、口部の隔壁とパリスンの積層部分は、口部を開口さ
せる切除時の応力を受け止めるに十分な剛性を有して撓
まず、その部分は高精度を保って切除される。そして、
パリソンの積層部分にブローピンの刺し込みによってブ
ロー孔が生じてもその積層部分は切除される部分である
から、容器の成形後にブロー孔を塞ぐ後工程を必要とし
ない。 According to the container blow molding method of the present invention,
As a mouth member constituting the mouth portion of the container, a member having a partition wall closing the opening portion is used, and a port provided on the partition wall is used.
Insert the blow pin into the Paris through the low pin insertion hole
In the blow molding, a laminated portion in which a molding wall made of parison is welded is formed on the partition wall portion at the mouth. For this reason, the laminated portion of the partition wall and the parison at the mouth does not bend with sufficient rigidity to receive the stress at the time of cutting to open the mouth, and the portion is cut with high accuracy. And
A blow pin is inserted into the parison laminate to
Even if a low hole occurs, the laminated part is the part to be cut off
Requires a post-process to close the blow holes after forming the container.
Absent.

【０００８】[0008]

【実施例】図１において、１は分割形式の金型であり、
そのキャビテイ２には、口部を構成する口部材３が、金
型１を開いた状態で、係止部４に予めインサートして設
置される。５は溶融したパリスンである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a divided mold.
In the cavity 2, a mouth member 3 constituting a mouth portion is inserted and set in advance in a locking portion 4 with the mold 1 opened. 5 is a melted parison.

【０００９】本発明の方法により製造される容器６は、
図２に示すように、容器壁７に一体に突出した口部８を
有するものである。９はキャップである。上記口部８
は、図３に詳細を示すように、口部材３を容器壁７と溶
着一体化して形成されたものであり、キャップ９は、そ
の内周面の雌ネジ１０を口部８の外周面の雄ネジ１１に
螺合して着脱自在となっている。図２において、１２は
ブロー成形により生じたパーティングラインを示してい
る。The container 6 manufactured by the method of the present invention comprises:
As shown in FIG. 2, the container wall 7 has an opening 8 integrally projecting therefrom. 9 is a cap. Mouth 8
As shown in detail in FIG. 3, the cap member 9 is formed by welding and integrating the mouth member 3 with the container wall 7. It is screwed to the male screw 11 and is detachable. In FIG. 2, reference numeral 12 denotes a parting line generated by blow molding.

【００１０】容器６のブロー成形は、図４に示すよう
に、一対の分割形式の金型１，１を開放状態とし、前記
のように一方の金型１のキャビテイ２に口部材３を設置
して、押出ヘッド１３から溶融したパリスン５を金型
１，１間に配置する。次いで、図１に示すように、金型
１，１を閉鎖し、ブローピン１４をパリスン５に刺し込
み、圧力流体を吹き込んでパリスン５を膨張させ、金型
１，１のキャビテイ２，２に沿った形状の容器６をブロ
ー成形する。In the blow molding of the container 6, as shown in FIG. 4, a pair of split molds 1 and 1 are opened, and the mouth member 3 is set in the cavity 2 of one mold 1 as described above. Then, the parison 5 melted from the extrusion head 13 is disposed between the dies 1 and 1. Next, as shown in FIG. 1, the molds 1 and 1 are closed, the blow pin 14 is pierced into the Paris 5, and the pressure fluid is blown to expand the Paris 5, and along the cavities 2 and 2 of the molds 1 and 1. The container 6 having the bent shape is blow molded.

【００１１】金型１のキャビテイ２に設置される口部材
３は、突出した口部８を形成する筒部１５と、容器壁７
に溶着される鍔部１６を有しており、筒部１５の鍔部１
６と一連をなす部分は隔壁１７によって閉じられてい
る。この隔壁１７には多数のエア逃げ孔１８が形成され
ており、金型１の係止部４にはエアを逃がすための空間
部１９が設けられている。２０はブローピン１４の挿入
孔である。The mouth member 3 installed in the cavity 2 of the mold 1 includes a cylindrical portion 15 forming a protruding mouth portion 8 and a container wall 7.
And a flange portion 1 of the cylindrical portion 15.
A part forming a series with 6 is closed by a partition 17. A large number of air escape holes 18 are formed in the partition 17, and a space 19 for allowing air to escape is provided in the locking portion 4 of the mold 1. Reference numeral 20 denotes an insertion hole for the blow pin 14.

【００１２】前記ブロー成形時において、口部材３の鍔
部１６と隔壁１７にパリスン５が溶着し、隔壁１７の部
分には、パリスン５による成形壁が溶着した積層部分２
１が一体状に形成される。なお、隔壁１７にパリスン５
が溶着される際に、隔壁１７とパリスン５間に残留して
いる空気は、エア逃げ孔１８から金型１の係止部４の空
間部１９に逃げるので、隔壁１７に対してパリスン５が
部分的に浮き上がることなく完全に溶着される。At the time of the blow molding, the parison 5 is welded to the flange 16 and the partition 17 of the mouth member 3, and the laminated wall 2 is formed by welding the wall formed by the paris 5 to the partition 17.
1 are formed integrally. In addition, Paris 5
Is welded, the air remaining between the partition wall 17 and the parison 5 escapes from the air escape hole 18 to the space 19 of the locking portion 4 of the mold 1. Completely welded without partial lifting.

【００１３】次いで、金型１，１を開放して成形品を取
り出し、口部材３の隔壁１７とパリスン５の積層部分２
１をともにドリルで切除し、口部８に開口部２２を形成
する後加工を施す。図１において２３はその切除部分を
示している。Next, the molds 1 and 1 are opened and the molded product is taken out, and the partition 17 of the mouth member 3 and the laminated portion 2 of the Paris 5 are removed.
1 is cut off with a drill, and post processing for forming an opening 22 in the mouth 8 is performed. In FIG. 1, reference numeral 23 denotes a cut-out portion.

【００１４】以上のように、口部８の隔壁１７の部分に
は、パリスン５による成形壁が溶着した積層部分２１が
形成されるので、口部８の隔壁１７とパリスン５の積層
部分２１は、口部８を開口させる切除時の応力を受け止
めるに十分な剛性を有し、切除時に撓まない。このた
め、容器壁７に対する口部８の溶着部分が上記切除加工
時に剥離するおそれがなく、溶着強度が損なわれない。
また、口部８の開口部２２の端面は、高い寸法精度で、
しかも平滑面に加工することができる。As described above, the laminated portion 21 formed by welding the wall formed by the parison 5 is formed in the portion of the partition 17 of the mouth 8, so that the laminated portion 21 of the partition 17 of the mouth 8 and the parison 5 is formed. The opening 8 has sufficient rigidity to receive the stress at the time of resection for opening, and does not bend at the time of resection. For this reason, there is no possibility that the welded portion of the mouth 8 to the container wall 7 may be peeled off during the above-mentioned cutting, and the welding strength is not impaired.
The end face of the opening 22 of the mouth 8 has high dimensional accuracy,
Moreover, it can be processed into a smooth surface.

【００１５】[0015]

【発明の効果】本発明によれば、容器壁に対する口部の
溶着強度を損なわず、口部の開口端面の寸法精度が高
く、かつ平滑面に容易に加工することができ、容器の成
形後にブロー孔を塞ぐ後工程を必要としない容器のブロ
ー成形方法が得られる。According to the present invention, without impairing the weld strength of the mouth portion to the container wall, high dimensional accuracy of the open end surface of the mouth portion, and can be easily processed into a smooth surface, containers formed
Container blower that does not require a post-process to close blow holes after forming
-A molding method is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係るブロー成形態様の一例を示す要部
断面図である。FIG. 1 is a cross-sectional view of an essential part showing an example of a blow molding mode according to the present invention.

【図２】本発明の方法により得られた容器の全体正面図
である。FIG. 2 is an overall front view of a container obtained by the method of the present invention.

【図３】図２の要部の拡大断面図である。FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

【図４】本発明のブロー成形態様の一例を示す正面図で
ある。FIG. 4 is a front view showing an example of a blow molding mode of the present invention.

【図５】従来例のブロー成形態様を示す要部断面図であ
る。FIG. 5 is a sectional view of a main part showing a conventional blow molding mode.

【符号の説明】 １ 分割形式の金型 ２ キャビテイ ３ 口部材 ４ 係止部 ５ パリスン ６ 容器 ７ 容器壁 ８ 口部 ９ キャップ１０ 雌ネジ １１ 雄ネジ １２ パーティングライン １３ 押出ヘッド１４ ブローピン １５ 筒部 １６ 鍔部 １７ 隔壁１８ エア逃げ孔 １９ 空間部 ２０ ブローピンの挿入孔 ２１ 積層部分 ２２ 開口部 ２３ 切除部分[Description of Signs] 1 Split mold 2 Cavity 3 Mouth member 4 Locking portion 5 Paris 6 Container 7 Container wall 8 Mouth 9 Cap 10 Female screw 11 Male screw 12 Parting line 13 Extrusion head 14 Blow pin 15 Tube portion DESCRIPTION OF SYMBOLS 16 Flange part 17 Partition wall 18 Air escape hole 19 Space part 20 Blow pin insertion hole 21 Stacking part 22 Opening 23 Cut part

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 分割形式の金型を開放した状態で、容器
の口部を構成する口部材としてその開口部を塞ぐととも
にブローピンの挿入孔を設けてある隔壁を有するものを
金型のキャビテイに設置し、可塑化されたパリスンを金
型間に配置して金型を閉鎖し、 次いで、口部材の隔壁に設けてあるブローピンの挿入孔
からブローピンをパリスンに刺し込み、圧力流体を吹き
込んでパリスンを膨張して容器の形状に成形するととも
に口部材を溶着し、かつ口部材の隔壁とパリスンによる
成形壁とを溶着して積層部分を形成し、 次いで、金型を開放して成形品を取り出し、口部材の隔
壁とパリスンの成形壁との積層部分を除去して口部を開
口することを特徴とする容器のブロー成形方法。In a state in which claim 1 was opened mold divided form, together when closing the opening as the mouth member constituting the mouth portion of the container
A mold having a partition having a blow pin insertion hole is installed in a mold cavity, a plasticized parison is arranged between the molds and the mold is closed, and then provided on the partition of the mouth member. Blow pin insertion hole
The blow pin into the parison
The parison is expanded and molded into the shape of a container, and the mouth member is welded, and the partition wall of the mouth member and the molding wall made of parison are welded to form a laminated portion. Then, the mold is opened and molded. A method for blow molding a container, comprising removing an article, removing a laminated portion of a partition wall of a mouth member and a molded wall of parison, and opening the mouth.
JP16167792A 1992-05-29 1992-05-29 Container blow molding method Expired - Fee Related JP3275102B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16167792A JP3275102B2 (en) 1992-05-29 1992-05-29 Container blow molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16167792A JP3275102B2 (en) 1992-05-29 1992-05-29 Container blow molding method

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JPH06143393A JPH06143393A (en) 1994-05-24
JP3275102B2 true JP3275102B2 (en) 2002-04-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009132137A (en) * 2007-10-31 2009-06-18 Kyoraku Co Ltd Insertion method in blow molding

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4959380B2 (en) * 2007-03-01 2012-06-20 三菱自動車工業株式会社 Blow molding spoiler with insert and blow molding spoiler with insert
JP5110508B2 (en) * 2007-05-16 2012-12-26 本田技研工業株式会社 Blow molding equipment
JP5005496B2 (en) * 2007-10-19 2012-08-22 本田技研工業株式会社 Fuel tank inlet structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009132137A (en) * 2007-10-31 2009-06-18 Kyoraku Co Ltd Insertion method in blow molding

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