JP2002200669A - Method for crystallizing neck part of synthertic resin bottle - Google Patents
Method for crystallizing neck part of synthertic resin bottleInfo
- Publication number
- JP2002200669A JP2002200669A JP2000400510A JP2000400510A JP2002200669A JP 2002200669 A JP2002200669 A JP 2002200669A JP 2000400510 A JP2000400510 A JP 2000400510A JP 2000400510 A JP2000400510 A JP 2000400510A JP 2002200669 A JP2002200669 A JP 2002200669A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- neck
- neck part
- crystallizing
- heating
- 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.)
- Pending
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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
- B29C49/645—Thermal conditioning of preforms characterised by temperature differential through the preform length by cooling the neck
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合成樹脂製瓶の首
部結晶化方法に関する。The present invention relates to a method for crystallizing a neck portion of a synthetic resin bottle.
【０００２】[0002]
【従来の技術】従来ＰＥＴ（ポリエチレンテレフタレー
ト）樹脂製瓶が多用されており、このような合成樹脂製
瓶は、通常射出成形金型によって図３に示すようなパリ
ソン１と呼ぶ中間成形品を成形し、これを瓶成形装置に
よって加工して、瓶を形成することになる。このように
して成形された合成樹脂製瓶において、高温の内容物を
充填するものにおいては、充填時に瓶の首部２を保護す
るために、首部２を結晶化して強度を確保することが行
われる。この結晶化は、パリソン成形後別に設けられた
結晶化装置によって首部２を加熱した後、徐冷すること
によって行われる。2. Description of the Related Art Conventionally, PET (polyethylene terephthalate) resin bottles are frequently used, and such synthetic resin bottles are usually formed by injection molding into an intermediate molded product called a parison 1 as shown in FIG. Then, this is processed by a bottle forming apparatus to form a bottle. In the synthetic resin bottle molded in this way, when the bottle is filled with high-temperature contents, the neck 2 is crystallized to secure the strength in order to protect the neck 2 of the bottle at the time of filling. . This crystallization is performed by heating the neck portion 2 by a crystallization device separately provided after the parison molding and then gradually cooling the neck portion.
【０００３】[0003]
【発明が解決しようとする課題】ところでこのような瓶
成形装置においては、発熱体による加熱が、首部の外部
の雰囲気中における加熱ということで、熱気が拡散し易
くて加熱時間が長くかかり、また瓶の首部の加熱が一様
に行われにくくて、瓶の首部に変形を生じ易いというよ
うな問題がある。By the way, in such a bottle forming apparatus, the heating by the heating element is heating in the atmosphere outside the neck, so that the hot air is easily diffused and the heating time is long. There is a problem that the neck of the bottle is not uniformly heated, and the neck of the bottle is easily deformed.
【０００４】そこで本発明の目的は、前記のような従来
の合成樹脂製瓶の首部結晶化方法のもつ問題を解消し、
発熱体による熱気が大気中に拡散しにくくて加熱時間が
短くてすみ、また瓶の首部の加熱が一様に行われて、瓶
の首部に変形を生じることのない合成樹脂製瓶の首部結
晶化方法を提供するにある。Accordingly, an object of the present invention is to solve the problems of the conventional method for crystallizing a neck portion of a synthetic resin bottle as described above,
The heat generated by the heating element is not easily diffused into the atmosphere, so the heating time is short.The neck of the bottle is evenly heated and the neck of the bottle is not deformed. It is to provide a conversion method.
【０００５】[0005]
【課題を解決するための手段】本発明は前記のような目
的を達成するために、請求項１に記載の発明は、射出成
形金型においてパリソンを成形した後、同射出成形金型
内で、該パリソンの首部を結晶化させることを特徴とす
るものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a method according to the present invention, wherein a parison is formed in an injection mold, and then the parison is formed in the injection mold. And crystallizing the neck of the parison.
【０００６】請求項２に記載の発明は、コア入子と首部
入子とを有するパリソン成形用射出成形金型において、
パリソンを成形した後、パリソンの首部を内側のコア入
子内、又は外側の首部入子内の冷媒と熱媒とによって、
冷却と加熱とを交互に行うことによって首部を結晶化さ
せることを特徴とするものである。According to a second aspect of the present invention, there is provided an injection mold for parison molding having a core insert and a neck insert,
After molding the parison, the neck of the parison is placed in the inner core insert, or by the refrigerant and heat medium in the outer neck insert,
The neck portion is crystallized by alternately performing cooling and heating.
【０００７】請求項３に記載の発明は、冷媒の温度は−
10〜50℃で、熱媒の温度は100〜1000℃であることを特
徴とするものである。[0007] In the invention according to claim 3, the temperature of the refrigerant is-
It is characterized in that the temperature of the heating medium is 10 to 50 ° C and the temperature of the heating medium is 100 to 1000 ° C.
【０００８】[0008]
【発明の実施の形態】図面に示す本発明の実施に使用さ
れる射出成形金型を参照して、本発明の実施の形態につ
いて説明する。３は射出成形金型を示し、この射出成形
金型３は、コア入子４と首部入子５とを具えていて、コ
ア入子４の外側面と、首部入子５の内側面との間の空腔
によってパリソン１の首部２の成型部が構成されてい
る。そしてコア入子４の外側面と、首部入子５の内側面
とを、冷却しまた加熱する冷媒と熱媒とが交互に作動す
る冷媒・熱媒作動部６、７が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to an injection mold used for carrying out the present invention shown in the drawings. Reference numeral 3 denotes an injection molding die, which is provided with a core insert 4 and a neck insert 5, and is provided between an outer surface of the core insert 4 and an inner surface of the neck insert 5. The molded space of the neck 2 of the parison 1 is constituted by the space between them. Refrigerant / heat medium operating portions 6 and 7 are provided for alternately operating a refrigerant and a heat medium for cooling and heating the outer surface of the core insert 4 and the inner surface of the neck insert 5.
【０００９】図１は、前記のような射出成形金型３によ
るパリソン１の成形時、及びその後同金型３内における
パリソン１の首部２の結晶化時の状態を示し、図２はこ
のようなパリソン１の成形作業、及び首部２の結晶化作
業が終了して、射出成形金型３が型開きして、まもなく
パリソン１を射出成形金型３から取り出す状態を示して
いる。FIG. 1 shows a state in which the parison 1 is formed by the injection mold 3 as described above, and a state in which the neck 2 of the parison 1 is crystallized in the mold 3 thereafter, and FIG. This shows a state in which the molding operation of the parison 1 and the crystallization operation of the neck portion 2 are completed, the injection molding die 3 is opened, and the parison 1 is taken out of the injection molding die 3 soon.
【００１０】このような首部２の結晶化作業は、パリソ
ン１が射出成形金型３内に、図１に示すような状態で保
持され、射出成形金型の型開きをすることなく、冷媒・
熱媒作動部６、７に保持した冷媒と熱媒とにより、冷却
及び加熱を交互に行うことになる。このようにしてパリ
ソン１の首部２の内側を、冷媒・熱媒作動部６内の冷媒
・熱媒により、外側を冷媒・熱媒作動部７内の冷媒と熱
媒とによって、交互に冷却と加熱とを行うことによって
結晶化が行われる。In the crystallization operation of the neck 2, the parison 1 is held in the injection mold 3 in a state as shown in FIG. 1, and the refrigerant and the refrigerant are opened without opening the injection mold.
Cooling and heating are alternately performed by the refrigerant and the heat medium held in the heat medium operation units 6 and 7. In this way, the inside of the neck portion 2 of the parison 1 is alternately cooled and cooled by the refrigerant and the heat medium in the refrigerant and heat medium operating portion 6 and the outside is cooled by the refrigerant and the heat medium in the refrigerant and heat medium operating portion 7. The crystallization is performed by heating.
【００１１】このような結晶化作業時において、パリソ
ン１の首部２は、コア入子４と首部入子５によって包囲
されていることから、熱気が大気中に拡散しにくくて加
熱時間が短くてすみ、またパリソン１の首部２の加熱が
一様に行われて、パリソン１の首部２に変形を生じるこ
とがない。In such a crystallization operation, the neck 2 of the parison 1 is surrounded by the core insert 4 and the neck insert 5, so that it is difficult for hot air to diffuse into the atmosphere and the heating time is short. In addition, the neck 2 of the parison 1 is uniformly heated, and the neck 2 of the parison 1 is not deformed.
【００１２】そして前記のようにして首部２の結晶化を
行うに際して、コア入子４の冷媒・熱媒作動部６及び首
部入子５の冷媒・熱媒作動部７内に保持される冷媒は、
水、ガス等からなっていて、その温度は、−10〜50℃と
されており、また熱媒は、ヒータ、ガス、油等からなっ
ていて、その温度は、100〜1000℃とされている。When the neck 2 is crystallized as described above, the refrigerant held in the refrigerant / heat medium operating section 6 of the core insert 4 and the refrigerant / heat medium operating section 7 of the neck insert 5 is ,
It is composed of water, gas, etc., and its temperature is -10 to 50 ° C., and the heat medium is made of heater, gas, oil, etc., and its temperature is 100 to 1,000 ° C. I have.
【００１３】[0013]
【発明の効果】この発明は前記のようであって、請求項
１に記載の発明は、射出成形金型においてパリソンを成
形した後、同射出成形金型内で、該パリソンの首部を結
晶化させるので、首部を結晶化するに際して、発熱体が
首部によって包囲されていることから、熱気が大気中に
拡散しにくくて加熱時間が短くてすみ、またパリソンの
首部の加熱が一様に行われて、パリソンの首部に変形を
生じることがないという効果がある。The present invention is as described above. According to the first aspect of the present invention, after a parison is molded in an injection mold, the neck of the parison is crystallized in the injection mold. When the neck is crystallized, the heating element is surrounded by the neck, so that it is difficult for hot air to diffuse into the atmosphere, so that the heating time is short, and the neck of the parison is uniformly heated. Accordingly, there is an effect that the neck of the parison is not deformed.
【００１４】請求項２に記載の発明は、コア入子と首部
入子とを有する射出成形型によって、合成樹脂製瓶成形
用のパリソンを成形した後、同射出成形型内で同パリソ
ンの首部を、内側のコア入子及び外側の首部入子内の、
冷媒と熱媒とによって交互に冷却、加熱することによっ
て、パリソンの首部を結晶化し、また請求項３に記載の
発明は、冷媒の温度は、−10〜50℃で、発熱体の温度
は、100〜1000℃であるので、請求項１に記載の発明と
同様の効果を有するのに加えて、パリソンの首部が外周
が首部入子の内周によって、また内周もコア入子の外周
によって密着支持されていることから、、パリソンの首
部の変形がさらに起りにくくて、寸法精度が確保される
という効果がある。According to a second aspect of the present invention, after a parison for molding a synthetic resin bottle is formed by an injection mold having a core insert and a neck insert, the neck of the parison is formed in the injection mold. In the inner core nest and the outer neck nest,
The neck portion of the parison is crystallized by alternately cooling and heating with a refrigerant and a heating medium, and the invention according to claim 3 has a temperature of the refrigerant of -10 to 50 ° C and a temperature of the heating element, Since the temperature is 100 to 1000 ° C., in addition to having the same effect as the invention according to claim 1, the outer periphery of the parison neck is formed by the inner periphery of the neck insert, and the inner periphery is also formed by the outer periphery of the core insert. Since the parison is closely supported, the neck of the parison is less likely to be deformed, and the dimensional accuracy is ensured.
【図１】本発明の実施形態のパリソン成形時およびその
首部の結晶化時の概略を説明する説明図である。FIG. 1 is an explanatory view schematically illustrating a parison molding and a neck crystallization according to an embodiment of the present invention.
【図２】同上のパリソンの首部の結晶化終了後における
パリソン取り出し時の概略を説明する説明図である。FIG. 2 is an explanatory diagram for explaining an outline of taking out the parison after crystallization of the neck of the parison is completed.
【図３】本発明により、完成されたパリソンの縦断面図
である。FIG. 3 is a longitudinal sectional view of a completed parison according to the present invention.
１ パリソン ２ 首部 ３ 射出成形金型 ４ コア入子 ５ 首部入子 ６ 冷媒・熱媒作動部 ７ 冷媒・熱媒作動部 DESCRIPTION OF SYMBOLS 1 Parison 2 Neck 3 Injection molding die 4 Core insert 5 Neck insert 6 Refrigerant / heat medium operating part 7 Refrigerant / heat medium operating part
Claims (3)
た後、同射出成形金型内で、該パリソンの首部を結晶化
させることを特徴とする合成樹脂製瓶の首部結晶化方
法。1. A method for crystallizing a neck portion of a synthetic resin bottle, comprising: after forming a parison in an injection molding die, crystallizing a neck portion of the parison in the injection molding die.
成形用射出成形金型において、パリソンを成形した後、
パリソンの首部を内側のコア入子内、又は外側の首部入
子内に交互に配置される冷媒と熱媒とによって、冷却と
加熱とを交互に行うことによって結晶化させることを特
徴とする請求項１に記載の合成樹脂製瓶の首部結晶化方
法。2. In a parison molding injection mold having a core insert and a neck insert, after forming a parison,
The method according to claim 1, wherein the parison neck is crystallized by alternately performing cooling and heating with a cooling medium and a heating medium alternately arranged in the inner core nest or the outer neck nest. Item 4. The method for crystallizing a neck portion of a synthetic resin bottle according to Item 1.
は100〜1000℃であることを特徴とする請求項２に記載
の合成樹脂製瓶の首部結晶化方法。3. The method according to claim 2, wherein the temperature of the refrigerant is −10 to 50 ° C. and the temperature of the heat medium is 100 to 1000 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000400510A JP2002200669A (en) | 2000-12-28 | 2000-12-28 | Method for crystallizing neck part of synthertic resin bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000400510A JP2002200669A (en) | 2000-12-28 | 2000-12-28 | Method for crystallizing neck part of synthertic resin bottle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002200669A true JP2002200669A (en) | 2002-07-16 |
Family
ID=18865096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000400510A Pending JP2002200669A (en) | 2000-12-28 | 2000-12-28 | Method for crystallizing neck part of synthertic resin bottle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002200669A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007112040A (en) * | 2005-10-21 | 2007-05-10 | Fujifilm Corp | Mold and molding method |
-
2000
- 2000-12-28 JP JP2000400510A patent/JP2002200669A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007112040A (en) * | 2005-10-21 | 2007-05-10 | Fujifilm Corp | Mold and molding method |
| JP4695485B2 (en) * | 2005-10-21 | 2011-06-08 | 富士フイルム株式会社 | Mold for molding and molding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4496517A (en) | Process for preparing saturated polyester resin bottles | |
| EP3689577B1 (en) | Blow-molding method and blow-molding apparatus | |
| KR960010218A (en) | Stretch Blow Molding Method for Large Containers | |
| WO2002062549A3 (en) | Method and apparatus for conditioning pet preforms and method and apparatus for manufacturing pet containers with out-of-center mouth | |
| JPH06179238A (en) | Injection stretch blow molding machine | |
| JPH05185493A (en) | High speed biaxial orientation blow molding method | |
| US9802729B2 (en) | Blow molding method, blow mold, and blow-molded container | |
| JP2002200669A (en) | Method for crystallizing neck part of synthertic resin bottle | |
| JP2007505766A (en) | Heat blow mold for heat stabilization treatment | |
| JP2001121598A (en) | Method for stretch blow molding of wide-mouthed vessel | |
| JPH09239852A (en) | Manufacture of resin vessel | |
| JPS6220013B2 (en) | ||
| JPH0363500B2 (en) | ||
| JPS62182044A (en) | Synthetic-resin bottle with grip and manufacture thereof | |
| JPS62238730A (en) | Manufacture of thermally fixed oriented container | |
| JPH0577310A (en) | Bottle made of polyethylene terephthalate resin and preparation thereof | |
| JP3972579B2 (en) | Heat-resistant PET bottle and manufacturing method thereof | |
| JPH01133716A (en) | Manufacture of biaxial-oriented and heat-set vessel | |
| JP2016210142A (en) | Method for producing hollow container and blow molding apparatus | |
| JPH0427093B2 (en) | ||
| JPS62284723A (en) | Method for processing mouth tube of molding product of polyethylene terephthalate resin bottle | |
| JPS6378727A (en) | Manufacture of biaxially stretched bottle | |
| JPH0365247B2 (en) | ||
| JPH02238924A (en) | Member made of thermoplastic material of polyster or polyamide, preferably of polyethylene terephthalate | |
| JPH02127023A (en) | Manufacture of polyester bottle |