JPH09193236A - Blow molding method and air blowing nozzle - Google Patents
Blow molding method and air blowing nozzleInfo
- Publication number
- JPH09193236A JPH09193236A JP8023364A JP2336496A JPH09193236A JP H09193236 A JPH09193236 A JP H09193236A JP 8023364 A JP8023364 A JP 8023364A JP 2336496 A JP2336496 A JP 2336496A JP H09193236 A JPH09193236 A JP H09193236A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- blowing nozzle
- nozzle
- mold
- collar
- 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
- 238000007664 blowing Methods 0.000 title claims abstract description 26
- 238000000071 blow moulding Methods 0.000 title claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000012809 cooling fluid Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/58—Blowing means
-
- 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
- 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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/66—Cooling by refrigerant introduced into the blown 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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6604—Thermal conditioning of the blown article
- B29C2049/6606—Cooling the article
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
(57)【要約】 （修正有）
【課題】 ブロー成形において、パリソンに高圧の圧縮
空気を注入する場合、エアー吹込ノズルとパリソンの一
端部の間隙からエアーが洩れたり、パリソンの他端部に
透孔が生じてそこからエアーが洩れたりして、所定の高
圧を所定時間保持できず成形条件を制御できないという
問題があるが、この問題を解決できるブロー成形方法お
よびエアー吹込ノズルを提供する。
【解決手段】 キャビティ外にはみだしたパリソン端部
の一方から吹込ノズル４を挿入すると共に両者の間隙を
密閉し、一方、パリソン端部の他方からストッパー１１
を挿入し、このストッパー１１によりパリソンの他端部
を密閉した状態で吹込ノズル４から加圧流体を吹込むよ
うにする。ノズル本体の外周面に型締めした金型の外側
面に対向してパリソン端部を押圧する前面を有するカラ
ーを装着してエアー吹込ノズルを構成する。
(57) [Abstract] (Correction) [Problem] In blow molding, when high-pressure compressed air is injected into a parison, air leaks from the gap between the air blowing nozzle and one end of the parison, or the other end of the parison is exposed. Although there is a problem that a through hole is generated and air leaks from the hole and a predetermined high pressure cannot be maintained for a predetermined time and molding conditions cannot be controlled, a blow molding method and an air blowing nozzle capable of solving this problem are provided. SOLUTION: A blowing nozzle 4 is inserted from one end of a parison protruding outside the cavity and a gap between the both is sealed, while a stopper 11 is provided from the other end of the parison.
Then, the pressurizing fluid is blown from the blowing nozzle 4 with the stopper 11 sealing the other end of the parison. An air blowing nozzle is configured by mounting a collar having a front surface that presses a parison end portion on the outer peripheral surface of the nozzle body so as to face the outer surface of the mold that is clamped.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱可塑性合成樹脂
のブロー成形方法およびこの方法の実施に用いられる改
良されたエアー吹込ノズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow molding method for thermoplastic synthetic resins and an improved air blowing nozzle used for carrying out the method.
【０００２】[0002]
【従来の技術】従来、中空容器やパイプ等の樹脂成形品
の製造方法としてブロー成形法が知られており、特に、
二次元的又は三次元的に屈曲した複雑な形状の樹脂成形
品の場合には、押出機のダイヘッドから樹脂材料を押出
して形成した円筒状のパリソンを所定の長さにカット
し、上下に分割した横置の金型の下金型のキャビティに
供給し、その後型締めした金型内のパリソンに圧縮気体
を注入してパリソンを膨らませて金型の内面に密着させ
ると共にパリソンを冷却固化させることにより行われて
いる。そして、パリソンに圧縮空気を注入する際には、
通常、金型に設けたノズル孔にエアー吹込ノズルを挿入
し、パリソンの長さ方向における一端部に突き刺して行
い、このときパリソンの長さ方向における他端部は型締
めした上下の金型により偏平状に押圧されている。Blow molding has been known as a method for producing resin molded products such as hollow containers and pipes.
In the case of a two-dimensional or three-dimensionally bent resin molded product with a complicated shape, a cylindrical parison formed by extruding the resin material from the die head of the extruder is cut into a predetermined length and divided into upper and lower parts. It is supplied to the cavity of the lower mold of the horizontally placed mold, and then compressed gas is injected into the parison in the mold that is clamped to inflate the parison so that it adheres to the inner surface of the mold and cools and solidifies the parison. Is done by. And when injecting compressed air into the parison,
Usually, an air blowing nozzle is inserted into the nozzle hole provided in the mold and pierced at one end in the length direction of the parison, and the other end in the length direction of the parison is made by the upper and lower molds clamped. It is pressed flat.
【０００３】[0003]
【発明が解決しようとする課題】ところで、パリソンを
金型の内面に充分に密着させて表面の光沢が優れた樹脂
成形品を得るためには、パリソンに注入する圧縮空気を
できるだけ高圧力にしてしかもそれを一定時間維持する
ことが要求される。しかしながら、高圧の圧縮空気を吹
込んだ場合、その後短時間の内にエアー吹込ノズルとパ
リソンの一端部の間隙からエアーが漏れたり、パリソン
の他端部の型締められた部分において、例えば３〜４ｋ
ｇ／ｃｍ2程度の圧力で自然に透孔が生じてそこからエ
アーが漏れたりして、所定の高圧を所定時間保持でき
ず、圧縮空気の保持について制御不可能であるという問
題があった。本発明は、上記問題を解決できるブロー成
形方法およびこの方法の実施に用いるエアー吹込ノズル
を提供することを課題とする。By the way, in order to bring the parison into close contact with the inner surface of the mold to obtain a resin molded product having an excellent surface gloss, the compressed air injected into the parison is set to a pressure as high as possible. Moreover, it is required to maintain it for a certain period of time. However, when high-pressure compressed air is blown, air leaks from the gap between the air blowing nozzle and one end of the parison within a short time thereafter, or, for example, 3 to 3 in the mold-clamped portion of the other end of the parison. 4k
There was a problem in that the pressure could not be maintained at a predetermined high pressure for a predetermined time because the through holes were naturally generated at a pressure of about g / cm 2 and air leaked from there, and the control of the compressed air could not be controlled. An object of the present invention is to provide a blow molding method capable of solving the above problems and an air blowing nozzle used for carrying out the method.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
め、本発明が採用した手段は、押出機から押出されたチ
ューブ状のパリソンを一対の半割型からなる横置の金型
のキャビティに収容すると共にこのパリソン内部に加圧
気体または加圧液体若しくはこれらの混合体を吹込んで
中空品を成形する方法において、上記キャビティ外には
み出した上記パリソン端部の一方から吹込ノズルを挿入
すると共に上記パリソン端部と上記吹込ノズルの間隙を
密閉するようにし、また、上記パリソン端部の他方から
ストッパーを挿入し、このストッパーにより上記パリソ
ンの他端部を密閉するようにした状態で上記吹込ノズル
から加圧気体または加圧液体若しくはこれらの混合体を
吹込むようにしたブロー成形方法にある。Means for Solving the Problems In order to solve the above-mentioned problems, the means adopted by the present invention is a cavity for a horizontal die which comprises a pair of half halves of a tubular parison extruded from an extruder. In the method of molding a hollow product by blowing a pressurized gas or a pressurized liquid or a mixture thereof into the parison, the blow nozzle is inserted from one of the parison ends protruding outside the cavity. The blow nozzle is designed such that the gap between the parison end and the blow nozzle is sealed, and a stopper is inserted from the other end of the parison, and the other end of the parison is closed by this stopper. A blow molding method in which a pressurized gas, a pressurized liquid, or a mixture of these is blown.
【０００５】また、パリソン内部が加圧気体または加圧
液体若しくはこれらの混合体の吹込みにより一定の圧力
に達した後に、ストッパーをパリソンより引き抜くこと
によりパリソンの他端部を開放し、このパリソン内部に
冷却流体を循環させてパリソンの冷却を行うようにした
ことである。また、型締め時に金型のキャビティ外には
みだしたパリソンの一端部を吹込ノズルのノズル本体に
装着したカラーの前面と金型とで押圧圧縮することによ
り、上記パリソンと上記吹込ノズルの間隙をシールする
ようにしたことである。また、カラーの前面に凹部を設
け、この凹部にパリソン端部を充満させて押圧圧縮する
ようにしたことである。Further, after the inside of the parison reaches a certain pressure by blowing a pressurized gas or a pressurized liquid or a mixture thereof, the stopper is pulled out from the parison to open the other end of the parison. The cooling fluid is circulated inside to cool the parison. In addition, when the mold is clamped, one end of the parison that protrudes outside the cavity of the mold is pressed and compressed by the mold and the front surface of the collar mounted on the nozzle body of the blow nozzle to seal the gap between the parison and the blow nozzle. That is what I did. Further, a concave portion is provided on the front surface of the collar, and the concave portion is filled with the end portion of the parison so as to be pressed and compressed.
【０００６】また、ノズル本体の外周面に型締めした金
型の外側面に対向してパリソン端部を押圧する前面を有
するカラーを装着したエアー吹込ノズルを構成すること
である。また、エアー吹込ノズルのカラーの前面にパリ
ソン端部を充満させる凹部を設けたことである。また、
エアー吹込ノズルのカラーがノズル本体に取外し自在に
装着されていることである。Another object of the present invention is to construct an air blowing nozzle equipped with a collar having a front surface that presses the end of the parison so as to face the outer surface of the mold clamped to the outer peripheral surface of the nozzle body. In addition, a recess for filling the end of the parison is provided on the front surface of the collar of the air blowing nozzle. Also,
The collar of the air blowing nozzle is detachably attached to the nozzle body.
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施例を図面に
基づいて説明する。図１は図示しない押出機のヘッドか
らチューブ状に押出されたパリソン１が内部にプリブロ
ーされ両端部が袋状に密閉された状態で上下に分割され
た金型の下金型２のキャビティに収容された状態を示
し、パリソンの両端部１Ａ，１Ｂが下金型２の外部には
みだして収容されており、ブロー成形後はバリとなるも
のである。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a parison 1 extruded in a tube shape from a head of an extruder (not shown) is pre-blowed inside and is housed in a cavity of a lower mold 2 of a mold which is divided into upper and lower parts with both ends sealed in a bag shape. The both ends 1A and 1B of the parison are housed outside the lower mold 2 and become burrs after blow molding.
【０００８】図２は金型を型締めしパリソン内部に加圧
気体又は加圧液体若しくはこれらの混合体（以下加圧流
体という）を注入する状態を示し、下金型２は上金型３
とパリソン両端部１Ａ，１Ｂを挟んで型締されると共に
金型に設けたノズル孔（図示せず）からエアー吹込ノズ
ル４がエアーシリンダー（図示せず）により前進挿入さ
れ、そのノズル先端部のエアー吹出口６はパリソンの一
端部１Ａを突き破ってパリソン内部に臨んでいる。他
方、パリソンの他端部１Ｂ側においては、先端に径小の
挿入部１２を有する円筒状のストッパー１１がエアーシ
リンダー（図示せず）により上下の金型２，３間に差し
込まれ、ストッパー１１と上下の金型２，３とでパリソ
ンの他端部１Ｂを圧縮してこの部分における気密保持が
図られている。FIG. 2 shows a state in which a mold is clamped and a pressurized gas or a liquid or a mixture thereof (hereinafter referred to as a pressurized fluid) is injected into the parison, and the lower mold 2 is the upper mold 3.
And the parison both ends 1A and 1B are clamped, and the air injection nozzle 4 is advanced by an air cylinder (not shown) from a nozzle hole (not shown) provided in the mold, and the nozzle tip end The air outlet 6 penetrates one end 1A of the parison and faces the inside of the parison. On the other hand, on the other end 1B side of the parison, a cylindrical stopper 11 having a small-diameter insertion portion 12 at its tip is inserted between the upper and lower molds 2 and 3 by an air cylinder (not shown), and the stopper 11 The other end 1B of the parison is compressed by the upper and lower molds 2 and 3 to keep airtightness in this part.
【０００９】一方、エアー吹込ノズル４は、図３に示す
ように、先端部にエアー吹出口６を有するノズル本体５
と、ノズル本体５の外周面に螺着等により取り外し自在
に装着されたカラー７とにより構成されている。そし
て、図４に拡大して示すように、カラー７の前面部８は
金型２，３の側面にパリソンのバリを挟んで押圧されて
いる。この際、カラー７の前面部には凹部９が設けられ
ており、この凹部９にパリソンの一端部１Ａが多量に溜
められてから圧縮され金型側面に押圧されるので、パリ
ソンと吹込ノズルの間隙はこのパリソンのバリにより完
全に塞がれ、エアー吹出口６から注入した高圧のエアー
が逆流して外部に漏れることはない。On the other hand, as shown in FIG. 3, the air blowing nozzle 4 has a nozzle body 5 having an air outlet 6 at the tip.
And a collar 7 detachably attached to the outer peripheral surface of the nozzle body 5 by screwing or the like. Then, as shown in an enlarged manner in FIG. 4, the front surface portion 8 of the collar 7 is pressed against the side surfaces of the molds 2 and 3 with a burr of a parison interposed therebetween. At this time, a concave portion 9 is provided on the front surface of the collar 7, and a large amount of one end portion 1A of the parison is stored in the concave portion 9 and then compressed and pressed against the side surface of the mold. The gap is completely closed by the burr of the parison, and the high-pressure air injected from the air outlet 6 does not flow backward and leak to the outside.
【００１０】上記の状態において、エアー吹出口６より
高圧例えば最大１５ｋｇ／ｃｍ2の加圧流体をパリソン
内部に注入して、パリソンを膨らませ金型内面に押し付
けてブロー成形を行う。そして、この高圧状態を所定の
時間保持した後、図５に示すように、ストッパー１１を
エアーシリンダーにより金型２，３から引き抜き、この
部分において開放部１３を形成し、エアー吹込ノズル４
から成形品１４内面に注入される冷却エアーが開放部１
３を通って外部に排出され循環することにより成形品１
４の冷却硬化が行われ、その後製品として金型から取り
出される。In the above state, a high pressure, for example, a pressurized fluid having a maximum of 15 kg / cm 2 is injected into the parison from the air outlet 6 to inflate the parison and press it against the inner surface of the mold for blow molding. Then, after maintaining this high-pressure state for a predetermined time, as shown in FIG. 5, the stopper 11 is pulled out from the molds 2 and 3 by an air cylinder to form an open portion 13 at this portion, and the air blowing nozzle 4
The cooling air injected from the inside of the molded article 14 from the open portion 1
Molded product 1 by being discharged to the outside through 3 and circulating
The cooling hardening of No. 4 is performed, and after that, it is taken out from the mold as a product.
【００１１】[0011]
【発明の効果】本発明において、請求項１に記載の発明
によれば、パリソン内部に高圧の加圧流体を吹込んでも
パリソン両端部は完全に密閉されているので、流体洩れ
が防止され、常に所定の高圧を所定時間維持でき、任意
の成形条件を制御できるのでブロー成形になんら支障を
来さない。請求項２に記載の発明によれば、パリソンの
冷却を迅速に行うことによって冷却時間の短縮化を図る
ことができ生産性の向上が可能となる。請求項３に記載
の発明によれば、請求項１に記載の発明と同様、パリソ
ンの一端部におけるシールを完全にすることができ、所
定の高圧力を所期の設定通りの時間パリソンに作用させ
ることができる。請求項４あるいは請求項６に記載の発
明によれば、パリソンの一端部におけるシールをより完
全にすることができる。請求項５に記載の発明によれ
ば、従来吹込ノズルの挿入位置をエアシリンダなどの押
圧力によって調整していたのをカラーの存在により挿入
深さの位置決めを容易にできる。請求項７に記載の発明
によれば、カラーをその長さを異にするものに取替える
ことにより、吹込ノズルの挿入位置決めを簡単にするこ
とができる。According to the present invention, the both ends of the parison are completely sealed even when a high-pressure pressurized fluid is blown into the parison, so that fluid leakage is prevented. Since a predetermined high pressure can always be maintained for a predetermined time and arbitrary molding conditions can be controlled, there is no problem in blow molding. According to the second aspect of the present invention, the cooling time can be shortened by rapidly cooling the parison, and the productivity can be improved. According to the invention described in claim 3, as in the invention described in claim 1, the seal at one end of the parison can be perfected, and a predetermined high pressure acts on the parison for a predetermined time as set. Can be made. According to the invention described in claim 4 or claim 6, the seal at one end of the parison can be made more complete. According to the fifth aspect of the present invention, the insertion position of the blow nozzle is conventionally adjusted by the pressing force of the air cylinder or the like, but the presence of the collar facilitates the positioning of the insertion depth. According to the invention described in claim 7, by replacing the collar with one having a different length, the insertion and positioning of the blow nozzle can be simplified.
【図１】本発明の成形方法の一実施例の工程を示す断面
図。FIG. 1 is a cross-sectional view showing a process of an embodiment of a molding method of the present invention.
【図２】本発明の成形方法の一実施例の工程を示す断面
図。FIG. 2 is a cross-sectional view showing the steps of an embodiment of the molding method of the present invention.
【図３】吹込ノズルの側面断面図。FIG. 3 is a side sectional view of a blow nozzle.
【図４】吹込ノズルをパリソン内に挿入した状態を示す
拡大断面図。FIG. 4 is an enlarged cross-sectional view showing a state in which a blowing nozzle is inserted into a parison.
【図５】本発明の成形方法の一実施例の工程を示す断面
図。FIG. 5 is a cross-sectional view showing the steps of an embodiment of the molding method of the present invention.
１…パリソン ２…下金型 ３…上金型 ４…吹込ノズル ５…ノズル本体 ６…エアー吹出口 ７…カラー ８…前面部 ９…凹部 １１…ストッパー １２…挿入部 １３…開放部 １４…成形品 1 ... Parison 2 ... Lower mold 3 ... Upper mold 4 ... Blowing nozzle 5 ... Nozzle body 6 ... Air outlet 7 ... Color 8 ... Front part 9 ... Concave part 11 ... Stopper 12 ... Insertion part 13 ... Open part 14 ... Molding Goods
Claims (7)
ソンを一対の半割型からなる横置の金型のキャビティに
収容すると共にこのパリソン内部に加圧気体または加圧
液体若しくはこれらの混合体を吹込んで中空品を成形す
る方法において、上記キャビティ外にはみ出した上記パ
リソン端部の一方から吹込ノズルを挿入すると共に上記
パリソン端部と上記吹込ノズルの間隙を密閉するように
し、また、上記パリソン端部の他方からストッパーを挿
入し、このストッパーにより上記パリソンの他端部を密
閉するようにした状態で上記吹込ノズルから加圧気体ま
たは加圧液体若しくはこれらの混合体を吹込むようにし
たことを特徴とするブロー成形方法。1. A tubular parison extruded from an extruder is housed in a cavity of a horizontal mold comprising a pair of half molds, and a pressurized gas or liquid or a mixture thereof is placed inside the parison. In a method of molding a hollow article by inserting a blowing nozzle from one of the parison ends protruding outside the cavity and sealing the gap between the parison end and the blowing nozzle, and the parison. It is characterized in that a stopper is inserted from the other end, and a pressurized gas or a pressurized liquid or a mixture thereof is blown from the blowing nozzle in a state where the stopper seals the other end of the parison. Blow molding method.
若しくはこれらの混合体の吹込みにより一定の圧力に達
した後に、ストッパーをパリソンより引き抜くことによ
りパリソンの他端部を開放し、このパリソン内部に冷却
流体を循環させてパリソンの冷却を行うようにした請求
項１に記載のブロー成形方法。2. After the inside of the parison reaches a certain pressure by blowing a pressurized gas, a pressurized liquid or a mixture thereof, the stopper is pulled out from the parison to open the other end of the parison. The blow molding method according to claim 1, wherein the parison is cooled by circulating a cooling fluid inside.
したパリソンの一端部を吹込ノズルのノズル本体に装着
したカラーの前面と金型とで押圧圧縮することにより、
上記パリソンと上記吹込ノズルの間隙をシールするよう
にした請求項１に記載のブロー成形方法。3. When the mold is clamped, one end of the parison protruding outside the cavity of the mold is pressed and compressed by the mold and the front surface of the collar attached to the nozzle body of the blow nozzle,
The blow molding method according to claim 1, wherein a gap between the parison and the blow nozzle is sealed.
パリソン端部を充満させて押圧圧縮するようにした請求
項３に記載のブロー成形方法。4. The blow molding method according to claim 3, wherein a concave portion is provided on the front surface of the collar, and the concave portion is filled with the parison end portion and pressed and compressed.
の外側面に対向してパリソン端部を押圧する前面を有す
るカラーを装着したエアー吹込ノズル。5. An air blowing nozzle equipped with a collar having a front surface that presses the end of the parison so as to face the outer surface of the mold clamped to the outer peripheral surface of the nozzle body.
る凹部を設けた請求項５に記載のエアー吹込ノズル。6. The air blowing nozzle according to claim 5, wherein the front surface of the collar is provided with a recess for filling the end of the parison.
されている請求項５に記載のエアー吹込ノズル。7. The air blowing nozzle according to claim 5, wherein the collar is detachably attached to the nozzle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08023364A JP3141987B2 (en) | 1996-01-17 | 1996-01-17 | Blow molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08023364A JP3141987B2 (en) | 1996-01-17 | 1996-01-17 | Blow molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09193236A true JPH09193236A (en) | 1997-07-29 |
| JP3141987B2 JP3141987B2 (en) | 2001-03-07 |
Family
ID=12108518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08023364A Expired - Fee Related JP3141987B2 (en) | 1996-01-17 | 1996-01-17 | Blow molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3141987B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007530322A (en) * | 2004-03-30 | 2007-11-01 | エス．アイ．ピー．エイ．ソシエタ’インダストリアリザッジオーネ プロゲッタジオーネ エ オートマジオーネ ソシエタ ペル アチオニ | Blow molding equipment for plastic products |
-
1996
- 1996-01-17 JP JP08023364A patent/JP3141987B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007530322A (en) * | 2004-03-30 | 2007-11-01 | エス．アイ．ピー．エイ．ソシエタ’インダストリアリザッジオーネ プロゲッタジオーネ エ オートマジオーネ ソシエタ ペル アチオニ | Blow molding equipment for plastic products |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3141987B2 (en) | 2001-03-07 |
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