JP2000218684A - Blow molding of resin hollow molded product - Google Patents
Blow molding of resin hollow molded productInfo
- Publication number
- JP2000218684A JP2000218684A JP2291799A JP2291799A JP2000218684A JP 2000218684 A JP2000218684 A JP 2000218684A JP 2291799 A JP2291799 A JP 2291799A JP 2291799 A JP2291799 A JP 2291799A JP 2000218684 A JP2000218684 A JP 2000218684A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- decorative
- parison
- hollow molded
- blow molding
- 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
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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、加飾シートにより
表面に模様や光沢を施した樹脂中空成形品をブロー成形
により成形する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for blow molding a hollow resin molded article having a surface provided with a pattern or gloss by a decorative sheet.
【０００２】本発明に係る樹脂中空成形品は、主とし
て、冷凍冷蔵コンテナや冷蔵庫のドア、建築用パネルや
ドア、あるいは自動車のスポイラー、ドアパネルまたは
コンソールパネルなどの断熱、遮音性を要求される用途
に供されるものである。[0002] The resin hollow molded article according to the present invention is mainly used for applications requiring heat insulation and sound insulation, such as doors of refrigerated containers and refrigerators, panels and doors for construction, automobile spoilers, door panels and console panels. It is provided.
【０００３】[0003]
【従来の技術】従来から、樹脂中空成型品のブロー成形
方法としては、特開平４−１４０５１号公報に示すよう
に、ダイから押し出したシートと織布とを一対のローラ
間を通して互いに貼り合わせて形成したパリソンを、分
割金型間に配置してブロー成形することが行われてい
る。2. Description of the Related Art Conventionally, as a blow molding method for a resin hollow molded product, as shown in Japanese Patent Application Laid-Open No. 4-14051, a sheet extruded from a die and a woven fabric are bonded to each other through a pair of rollers. The formed parison is arranged between divided molds and blow molded.
【０００４】[0004]
【発明が解決しようとする課題】ところで、この従来の
方法では、分割金型の型締めの工程でシート状のパリソ
ンが分割金型のキャビティに不規則に接触して付着する
ことがあり、これが成形不良を起こす原因となってい
た。また、パリソンがシート状であるところから、分割
金型のキャビティに対して必ずしも均等に沿わない現象
が起こり、特に表面が加飾されたものにあっては、模様
や光沢などの装飾性が損なわれたり低下することが避け
られなかった。However, in this conventional method, a sheet-shaped parison may be irregularly contacted and adhere to the cavity of the divided mold in the step of clamping the divided mold. This was a cause of molding failure. In addition, since the parison is in a sheet shape, a phenomenon that the parison does not necessarily follow the cavity of the split mold necessarily occurs, and especially in the case of a decorated surface, decorative properties such as pattern and gloss are impaired. It was inevitable that it would drop or fall.
【０００５】そこで、本発明は、従来のこの種の樹脂中
空成形品の成形方法における欠点を解消すべく、一対の
シート状パリソンのうち、少なくとも一方のシート状パ
リソンをその外側に装飾シートとを対向させて密着させ
た加飾パリソンとしたものを、キャビティの周囲に突出
可能な摺動部を備えた分割金型間に配置し、上記摺動部
を突出させてその端面をシート状パリソンに接触させ
て、シート状パリソンと分割金型のキャビティとの間に
閉じた空間を形成する状態としをうえ、分割金型のキャ
ビティ面から上記空間内の空気を真空吸引してシート状
パリソンを分割金型のキャビティ面に密着させる手段を
採用することにより、一対のパリソンがシート状であっ
ても分割金型間に配置したパリソンがキャビティに不規
則に接触することをなくして、キャビティに均等に密着
させたうえ、ブロー成形することができ、成形不良を生
ぜず、しかも表面に加飾が施されたものにおいて特に表
面の装飾性すぐれた樹脂中空成形を得ることができる樹
脂中空成形品のブロー成形方法を提供することを目的と
するものである。[0005] In order to solve the drawbacks in the conventional method of molding a resin hollow molded article, the present invention provides at least one of the pair of sheet parisons with a decorative sheet on the outside thereof. A decorative parison that is opposed and closely attached is placed between divided molds having a sliding part that can protrude around the cavity, and the sliding part is protruded and its end face is formed into a sheet parison. The sheet parison is divided by contacting and forming a closed space between the sheet-shaped parison and the cavity of the split mold, and vacuuming the air in the space from the cavity surface of the split mold. By adopting a means for bringing the parison into close contact with the cavity surface of the mold, even if the pair of parisons is in the form of a sheet, it is possible to prevent the parison arranged between the divided molds from coming into irregular contact with the cavity. Thus, it is possible to blow-mold the resin evenly in close contact with the cavity, and to obtain a resin hollow molding which does not cause molding defects and has a decorative surface particularly excellent in the surface-decorated one. It is an object of the present invention to provide a method for blow molding a resin hollow molded article that can be performed.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明の請求項１に係る樹脂中空成形品のブロー成
形方法は、樹脂押出ヘッドから押し出した一対のシート
状パリソンのうち、少なくとも一方のシート状パリソン
をその外側に装飾シートとを対向させて密着させた加飾
パリソンとしてキャビティの周囲に突出可能な摺動部を
備えた分割金型間に配置し、上記摺動部を突出させてそ
の端面を前記シート状パリソンに接触させて、シート状
パリソンと分割金型のキャビテイとの間を閉じた空間を
形成する状態としたうえ、分割金型のキャビティ面から
上記空間内の空気を真空吸引して、上記シート状パリソ
ンを分割金型のキャビティ面に密着させ、前記突出させ
た摺動部を後退させながら分割金型を締めてキャビティ
の周囲を互いに密着させてピンチオフ部を形成し、次い
でシート状パリソンの内部に圧力流体を導入して樹脂中
空成形品をブロー成形することを特徴とするものであ
る。According to a first aspect of the present invention, there is provided a method for blow molding a resin hollow molded article, wherein at least one of a pair of sheet parisons extruded from a resin extrusion head is provided. The sheet-shaped parison is placed between divided molds having a sliding portion that can protrude around the cavity as a decorative parison having a decorative sheet facing the decorative sheet facing the outside, and the sliding portion is protruded. Then, the end face thereof is brought into contact with the sheet-shaped parison to form a closed space between the sheet-shaped parison and the cavity of the split mold, and the air in the space is separated from the cavity surface of the split mold. Vacuum suction is applied to bring the sheet-shaped parison into close contact with the cavity surface of the split mold, and tighten the split mold while retracting the protruding sliding portion, so that the periphery of the cavity is in close contact with each other. Allowed to form a pinch-off portion, and then is characterized in that the blow molding of the resin hollow molded article by introducing a pressurized fluid into the interior of the sheet-like parison.
【０００７】また、本発明の請求項２に係る樹脂中空成
形品のブロー成形方法は、請求項１記載の方法におい
て、少なくとも一方のシート状パリソンをその外側に装
飾シートとを対向させて密着させた加飾パリソンは、圧
着ロールにより互いに圧着して形成されることを特徴と
するものである。According to a second aspect of the present invention, there is provided a method for blow molding a resin hollow molded article according to the first aspect, wherein at least one of the sheet-like parisons is brought into close contact with a decorative sheet on the outside thereof. The decorated parisons are formed by being pressed against each other by a pressure roll.
【０００８】本発明の請求項３に係る樹脂中空成形品の
ブロー成形方法は、請求項１または２記載の方法におい
て、シート状パリソンは、環状パリソンを切り開いてシ
ート状に形成することを特徴とするものである。According to a third aspect of the present invention, there is provided a blow molding method for a resin hollow molded article, wherein the sheet-like parison is formed by cutting a circular parison into a sheet-like shape. Is what you do.
【０００９】本発明の請求項４に係る樹脂中空成形品の
ブロー成形方法は、請求項１、２または３記載の方法に
おいて、シート状パリソンと装飾シートは、同材質であ
ることを特徴とするものである。According to a fourth aspect of the present invention, there is provided a method for blow molding a resin hollow molded article, wherein the sheet parison and the decorative sheet are made of the same material. Things.
【００１０】本発明の請求項５に係る樹脂中空成形品の
ブロー成形方法は、請求項１、２、３または４記載の方
法において、装飾シートは、木目模様、大理石模様、石
目模様、または光沢面を有することを特徴とするもので
ある。According to a fifth aspect of the present invention, there is provided a blow molding method of a resin hollow molded article, wherein the decorative sheet is a wood grain pattern, a marble pattern, a stone pattern, or It has a glossy surface.
【００１１】本発明の請求項６に係る樹脂中空成形品の
ブロー成形方法は、請求項１、２、３、４または５記載
の方法において、装飾シートは、その一部が布状である
ことを特徴とするものである。According to a sixth aspect of the present invention, there is provided the blow molding method for a resin hollow molded article according to the first, second, third, fourth, or fifth aspect, wherein the decorative sheet is partly cloth-shaped. It is characterized by the following.
【００１２】[0012]
【発明の実施の形態】図１は本発明に係る樹脂中空成形
品のブロー成形方法により成形された樹脂中空成形品を
一部破断して示す全体斜視図である。図２ないし図８は
本発明に係る樹脂中空成形品のブロー成形方法の実施の
形態あって、樹脂押出ヘッドから押し出されたシート状
パリソンと装飾シートとにより加飾パリソンを形成する
態様を示す正面図、図３は樹脂押出ヘッドを下方からみ
た下面図、図４は図２の破線円Ａ内の詳細構成を示す断
面図、図５は分割金型間に加飾パリソンを配置した工程
を示す断面図、図６は分割金型間に配置した加飾パリソ
ンをキャビティ面に真空吸着した工程を示す断面図、図
７は樹脂中空成形品内に発泡体を内装する工程を示す断
面図、図８はブロー成形の工程を示す断面図である。FIG. 1 is an overall perspective view showing a partially cutaway hollow resin molded article formed by a blow molding method for a hollow resin article according to the present invention. FIGS. 2 to 8 show an embodiment of the blow molding method for a resin hollow molded article according to the present invention, and show a mode in which a decorative parison is formed by a sheet parison and a decorative sheet extruded from a resin extrusion head. FIG. 3 is a bottom view of the resin extrusion head as viewed from below, FIG. 4 is a cross-sectional view showing a detailed configuration within a dashed circle A in FIG. 2, and FIG. 5 shows a process in which a decorative parison is arranged between split molds. FIG. 6 is a cross-sectional view showing a process of vacuum-adsorbing a decorative parison disposed between divided molds on a cavity surface, and FIG. 7 is a cross-sectional view showing a process of providing a foam inside a resin hollow molded article. FIG. 8 is a sectional view showing a blow molding process.
【００１３】図１において、１は樹脂中空成形品であ
り、この樹脂中空成形品１は、主体層２と主体層２の外
面層を覆う加飾膜層３とでなり、樹脂中空成形品１内に
は、発泡体４が密に内装されている。In FIG. 1, reference numeral 1 denotes a hollow resin molded product. The hollow resin molded product 1 includes a main layer 2 and a decorative film layer 3 covering an outer surface layer of the main layer 2. Inside, a foam 4 is densely provided.
【００１４】樹脂中空成形品１を構成する主体層２は、
ポリエチレン、ポリプロピレン、ポリアミド、ポリスチ
レン、ＡＢＳ樹脂、ポリエチレンテレフタートなどの熱
可塑性樹脂でなり、加飾膜層３は主体層２と同材質の熱
可塑性樹脂で構成したりあるいはホットメルトタイプの
接着剤を介したり接着した布を介した異質な熱可塑性樹
脂または布などの装飾材で構成される。加飾膜層は、熱
可塑性樹脂の場合はその表面に木目模様、大理石模様、
石目模様または光沢面を有する。加飾膜層３と主体層２
との接合は、加飾膜層３が同材質の熱可塑性樹脂の場合
はそれらの溶着により発現し、ホットメルトタイプの接
着剤を介した異質な熱可塑性樹脂の場合は接着剤の接着
により発現するものであり、さらに接着した布を介した
異質な熱可塑性樹脂の場合あるいは布等の装飾材の場合
は布の目の中に熱可塑性樹脂が入り込むことにより物理
的に接合されるものである。加飾膜層３の表面に木目模
様、大理石模様、石目模様、あるいは光沢面を形成する
には、その表面に印刷を施したり表面処理をするなど適
宜の手段によることができる。発泡体４は発泡ポリエチ
レン、発泡ポリプロピレンあるいは発泡ポリスチロール
などであるが、リサイクルのうえで発泡体４の材質は、
主体層２と同材質であることが好ましい。The main layer 2 constituting the resin hollow molded article 1 is
The decorative film layer 3 is made of a thermoplastic resin such as polyethylene, polypropylene, polyamide, polystyrene, ABS resin, or polyethylene terephthalate, and the decorative layer 3 is made of the same material as the main layer 2 or a hot-melt adhesive is used. It is composed of a decoration material such as a heterogeneous thermoplastic resin or cloth through an interposed or bonded cloth. In the case of a thermoplastic resin, the decorative film layer has a grain pattern, a marble pattern,
It has a stone pattern or glossy surface. Decorative film layer 3 and main layer 2
When the decorative film layer 3 is a thermoplastic resin of the same material, it is developed by welding them, and when the decorative film layer 3 is a heterogeneous thermoplastic resin via a hot-melt type adhesive, it is developed by bonding of the adhesive. In the case of a heterogeneous thermoplastic resin via a bonded cloth or a decorative material such as a cloth, the thermoplastic resin enters the eyes of the cloth and is physically bonded. . In order to form a wood pattern, a marble pattern, a stone pattern, or a glossy surface on the surface of the decorative film layer 3, any appropriate means such as printing or surface treatment can be applied to the surface. The foam 4 is foamed polyethylene, foamed polypropylene, foamed polystyrene, or the like.
The material is preferably the same as that of the main layer 2.
【００１５】次に、図１に示すような樹脂中空成形品１
のブロー成形態様について説明する。図２に示すよう
に、樹脂押出ヘッド５から押し出されるシート状パリソ
ン６と装飾シート７は、圧着ロール８，８により互いに
圧着され、内側がシート状パリソン６、外側が装飾シー
ト７からなる加飾パリソン９が形成される（図４参
照）。加飾パリソン９のシート状パリソン６は図１の主
体層２、装飾シート７は加飾膜層３となる層である。装
飾シート７は、その一部、特に内面の一部が布状である
ことが、シート状パリソン６との溶着を強くするうえで
好適である。樹脂押出ヘッド５は、環状の樹脂路１０を
有するものであって、その環状の樹脂路１０は、詰め部
材１１，１１により２分されて、樹脂押出ヘッド５から
押し出される環状のパリソンは切り開かれて、上記のよ
うな一対のシート状パリソン６，６となるものである。
上記ロール８，８は、表面にフッ素の薄膜でコーティン
グを施し、また７０〜１００℃程度に加熱するのが樹脂
の付着防止および溶着高度の向上のうえで好ましい。Next, a resin hollow molded article 1 as shown in FIG.
Will be described. As shown in FIG. 2, the sheet parison 6 and the decorative sheet 7 extruded from the resin extrusion head 5 are pressed against each other by pressing rolls 8, 8, and are decorated with the sheet parison 6 on the inside and the decorative sheet 7 on the outside. A parison 9 is formed (see FIG. 4). The sheet-like parison 6 of the decorative parison 9 is the main layer 2 and the decorative sheet 7 is the layer of the decorative film layer 3 in FIG. It is preferable that a part of the decorative sheet 7, in particular, a part of the inner surface thereof be cloth-like, in order to strengthen the welding with the sheet-like parison 6. The resin extrusion head 5 has an annular resin path 10. The annular resin path 10 is divided into two parts by filling members 11, 11, and an annular parison extruded from the resin extrusion head 5 is cut open. Thus, a pair of sheet parisons 6 and 6 as described above are formed.
It is preferable to coat the surfaces of the rolls 8 and 8 with a thin film of fluorine and heat the rolls to about 70 to 100 ° C. in order to prevent adhesion of the resin and improve the welding height.
【００１６】図５に示すように、一対の加飾パリソン
９，９を分割金型１２，１２間に配置するが、この工程
においては、分割金型１２，１２のキャビティ１３，１
３の周囲にキャビティ１３，１３から突出可能に備えら
れている摺動部１４，１４を突出させてその端面を加飾
パリソン９，９に接触させ、加飾パリソン９，９と分割
金型１２，１２のキャビテイ１３，１３との間を閉じた
空間を形成する状態とする。そして、図６に示すよう
に、真空ポンプおよび真空タンク（いずれも図示せず）
と接続した真空チャンバー１５により分割金型１２，１
２のキャビティ１３，１３の面から上記空間内の空気を
真空吸引して、加飾パリソン９，９を分割金型１２，１
２のキャビティ１３，１３の面に密着させる。次いで、
図７に示すように、分割金型１２，１２の間で一対の加
飾パリソン９，９間に発泡体４を配置したうえ、図８に
示すように、分割金型１２，１２を型締めし、キャビテ
ィ１３，１３の周囲を互いに密着させてピンチオフを形
成し、ブローピン１６を一方の加飾パリソン９に差し込
んで内部に加圧流体を導入して、ブロー成形して図１に
示すような樹脂中空成形品を成形する。なお、分割金型
１２，１２において、真空チャンバー１５とキャビティ
１３，１３の面側とは、金型を構成する部材の接触面１
７に生じる隙間により連通されるものである。As shown in FIG. 5, a pair of decorative parisons 9, 9 are arranged between the split molds 12, 12. In this step, the cavities 13, 1 of the split molds 12, 12 are arranged.
3, the sliding portions 14, 14 provided so as to be able to protrude from the cavities 13, 13 are made to protrude so that their end faces contact the decorative parisons 9, 9, and the decorative parisons 9, 9 and the split mold 12 , 12 with the cavities 13, 13 to form a closed space. Then, as shown in FIG. 6, a vacuum pump and a vacuum tank (both not shown)
Molds 12, 1 by a vacuum chamber 15 connected to the
The air in the space is vacuum-evacuated from the surfaces of the cavities 13, 13 to separate the decorated parisons 9, 9 into the split molds 12, 1.
The second cavity 13 is brought into close contact with the surface. Then
As shown in FIG. 7, the foam 4 is arranged between the pair of decorative parisons 9, 9 between the split molds 12, 12, and the split molds 12, 12 are clamped as shown in FIG. Then, the peripheries of the cavities 13 and 13 are brought into close contact with each other to form a pinch-off, and a blow pin 16 is inserted into one of the decorative parisons 9 to introduce a pressurized fluid into the interior and blow-molded as shown in FIG. A resin hollow molded article is formed. In the split molds 12, 12, the vacuum chamber 15 and the surface side of the cavities 13, 13 correspond to the contact surfaces 1 of the members constituting the mold.
7 are communicated with each other.
【００１７】本発明に係る樹脂中空成形品のブロー成形
方法によれば、一対の加飾パリソン９，９を、キャビテ
ィ１３，１３の周囲に突出可能な摺動部１４，１４を備
えた分割金型１２，１２間に配置し、上記摺動部１４，
１４を突出させてその端面を加飾パリソン９，９に接触
させて、加飾パリソン９，９と分割金型１２，１２のキ
ャビテイ１３，１３との間に閉じた空間を形成する状態
としたうえ、分割金型１２，１２のキャビティ１３，１
３の面から上記空間内の空気を真空吸引して加飾パリソ
ン９，９を分割金型１２，１２のキャビティ１３，１３
の面に密着させる手段を採用しているので、一対の加飾
パリソン９，９がシート状であっても分割金型１２，１
２のキャビティ１３，１３に不規則に接触することがな
く、キャビティ１３，１３に均等に密着させて予め樹脂
中空成形品の略外形を成形したうえでブロー成形するこ
とができる。このため、加飾パリソン９，９がシート状
であっても成形不良が生ぜず、しかも表面に加飾が施さ
れたものにおいて特に表面の装飾性すぐれた樹脂中空成
形を得ることができる。According to the blow molding method of the resin hollow molded article according to the present invention, the pair of decorative parisons 9, 9 are divided into metal parts having sliding portions 14, 14 protruding around the cavities 13, 13. Placed between the dies 12,
14 is projected and its end face is brought into contact with the decorating parisons 9, 9 to form a closed space between the decorating parisons 9, 9 and the cavities 13, 13 of the split molds 12, 12. In addition, the cavities 13, 1 of the split molds 12, 12
3, the decorated parisons 9, 9 are vacuum-evacuated from the surface of the space to form the decorated parisons 9, 9, and the cavities 13, 13 of the split molds 12, 12.
Since the means for adhering to the surfaces of the pair of decorative parisons 9, 9 are sheet-like, the split molds 12, 1
Without irregular contact with the cavities 13, 13, the resin hollow molded article can be blow-molded after it has been molded in close contact with the cavities 13, 13 so as to form a substantially external shape in advance. For this reason, even if the decorative parisons 9 and 9 are sheet-shaped, molding failure does not occur, and in the case where the surface is decorated, it is possible to obtain resin hollow molding with particularly excellent decorativeness on the surface.
【００１８】なお、本発明に係る実施の形態によれば、
樹脂中空品１の内部に発泡体４を内装して、断熱性およ
び遮音性を向上させているが、用途によっては、この発
泡体４を内装しないものであってもよい。According to the embodiment of the present invention,
Although the foam 4 is provided inside the hollow resin article 1 to improve heat insulation and sound insulation, the foam 4 may not be provided depending on the use.
【００１９】加飾パリソン９，９は、ブロー成形後の冷
却により収縮する。例えば、加飾パリソン９がポリエチ
レンでは１．８％、ポリプロピレンでは１．６％、ポリ
スチレンでは０．８％、ＡＢＳ樹脂では０．５〜０．７
％である。したがって、図１に示す樹脂中空成形品１
は、収縮率を見込んで大きめに成形するが、内装する発
泡体４は、収縮を見込むことなく樹脂中空成形品１の肉
厚分だけ除いた寸法からなる成形品であるから、図７に
示す工程において、発泡体４を配置し、次いで図８に示
す型締めの際には、余裕をもって加飾パリソン９，９内
に入れ込むことができる。この場合、上記冷却による収
縮分だけの隙間が加飾パリソン９，９と発泡体４との間
にあっても、冷却後はその内部に密に内装されて状態と
なる。The decorative parisons 9, 9 shrink by cooling after blow molding. For example, the decorative parison 9 is 1.8% in polyethylene, 1.6% in polypropylene, 0.8% in polystyrene, and 0.5 to 0.7 in ABS resin.
%. Therefore, the resin hollow molded article 1 shown in FIG.
Is formed to be large in anticipation of the shrinkage, but the foam 4 to be interior is a molded product having a dimension excluding the thickness of the resin hollow molded product 1 without anticipating shrinkage, and is shown in FIG. In the process, the foam body 4 is arranged, and then can be inserted into the decorating parisons 9, 9 with a margin at the time of the mold clamping shown in FIG. In this case, even if there is a gap between the decorative parisons 9 and 9 and the foam 4 due to the shrinkage due to the cooling, after the cooling, the interior is densely packed inside.
【００２０】ところで、ブローピン１６を一方の加飾パ
リソン９に差し込んで内部に加圧流体を導入してブロー
成形する際には、上記冷却による収縮による隙間を通じ
て加圧流体を導入すると、従来のブロー成形と同様の冷
却効率で冷却することができるが、発泡体４の温度は基
本的に常温であるから、概して速く冷却することができ
る。By the way, when the blow pin 16 is inserted into one of the decorative parisons 9 to introduce a pressurized fluid into the interior and perform blow molding, when the pressurized fluid is introduced through the gap caused by the above-described shrinkage due to cooling, the conventional blow Although the cooling can be performed with the same cooling efficiency as that of the molding, the temperature of the foam 4 is basically room temperature, so that the cooling can be generally performed quickly.
【００２１】なお、発泡体４の存在によりパリソンがブ
ローピン１６の挿入によっても逃げないので、ブローピ
ン１６はどの位置に設けてもかまわない。Since the parison does not escape even when the blow pin 16 is inserted due to the presence of the foam 4, the blow pin 16 may be provided at any position.
【００２２】発泡体４は、加飾パリソン９と必ずしも同
材質でなくてもよいが、これを同材質とすれば、リサイ
クルのうえで好ましい。The foam 4 does not necessarily have to be made of the same material as the decorative parison 9, but if it is made of the same material, it is preferable in terms of recycling.
【００２３】[0023]
【発明の効果】本発明によれば、樹脂押出ヘッドから押
し出した一対のシート状パリソンのうち、少なくとも一
方のシート状パリソンをその外側に装飾シートとを対向
させて密着させた加飾パリソンとしてキャビティの周囲
に突出可能な摺動部を備えた分割金型間に配置し、上記
摺動部を突出させてその端面を前記シート状パリソンに
接触させて、シート状パリソンと分割金型のキャビテイ
との間を閉じた空間を形成する状態としたうえ、分割金
型のキャビティ面から上記空間内の空気を真空吸引し
て、上記シート状パリソンを分割金型のキャビティ面に
密着させ、前記突出させた摺動部を後退させながら分割
金型を締めてキャビティの周囲を互いに密着させてピン
チオフ部を形成し、次いでシート状パリソンの内部に圧
力流体を導入して樹脂中空成形品をブロー成形すること
により、一対のパリソンがシート状であっても分割金型
間に配置したパリソンがキャビティに不規則に接触する
ことをなくして、キャビティに均等に密着させたうえ、
ブロー成形することができ、パリソンがシート状であっ
ても成形不良が発生せず、しかも表面に加飾が施された
ものにおいて特に表面の装飾性すぐれた樹脂中空成形を
得ることができる効果を奏するものである。According to the present invention, at least one sheet parison of a pair of sheet parisons extruded from a resin extrusion head has a cavity as a decorative parison in which a decorative sheet is brought into close contact with a decorative sheet on the outside thereof. It is arranged between the divided molds having a sliding portion that can protrude around the periphery, and the end of the sliding portion is brought into contact with the sheet-shaped parison, so that the sheet-shaped parison and the cavity of the divided mold are disposed. In a state where a closed space is formed, the air in the space is suctioned from the cavity surface of the split mold by vacuum, and the sheet parison is brought into close contact with the cavity surface of the split mold, and is protruded. While the sliding part is retracted, the split molds are tightened and the peripheries of the cavities are brought into close contact with each other to form a pinch-off part. A hollow molded article by blow molding, after which the pair of the parison is eliminated that the parison disposed between even split molds a sheet is irregularly contacts the cavity was uniformly close contact with the cavity,
Blow molding can be performed, and even if the parison is in the form of a sheet, molding defects do not occur. To play.
【図１】本発明に係る樹脂中空成形品のブロー成形方法
により成形された樹脂中空成形品を一部破断して示す全
体斜視図である。FIG. 1 is an overall perspective view showing a partially cut resin hollow molded product formed by a blow molding method for a resin hollow molded product according to the present invention.
【図２】本発明に係る樹脂中空成形品のブロー成形方法
の実施の形態あって、樹脂押出ヘッドから押し出された
シート状パリソンと装飾シートとにより加飾パリソンを
形成する態様を示す正面図である。FIG. 2 is a front view showing an embodiment of a blow molding method of a resin hollow molded article according to the present invention, in which a decorative parison is formed by a sheet parison and a decorative sheet extruded from a resin extrusion head. is there.
【図３】樹脂押出ヘッドを下方からみた下面図である。FIG. 3 is a bottom view of the resin extrusion head as viewed from below.
【図４】図２の破線円Ａ内の詳細構成を示す断面図であ
る。FIG. 4 is a sectional view showing a detailed configuration within a dashed circle A in FIG. 2;
【図５】分割金型間に加飾パリソンを配置した工程を示
す断面図である。FIG. 5 is a cross-sectional view showing a process in which a decorative parison is arranged between split molds.
【図６】分割金型間に配置した加飾パリソンをキャビテ
ィ面に真空吸着した工程を示す断面図である。FIG. 6 is a cross-sectional view showing a step of vacuum-adsorbing a decorative parison disposed between divided molds onto a cavity surface.
【図７】樹脂中空成形品内に発泡体を内装する工程を示
す断面図である。FIG. 7 is a cross-sectional view showing a step of providing a foam inside a resin hollow molded article.
【図８】ブロー成形の工程を示す断面図である。FIG. 8 is a sectional view showing a blow molding process.
１ 樹脂中空成形品 ２ 主体層 ３ 加飾膜層 ４ 発泡体 ５ 樹脂押出ヘッド ６ シート状パリソン ７ 装飾シート ８ 圧着ロール ９ 加飾パリソン １０ 環状の樹脂路 １１ 詰め部材 １２ 分割金型 １３ キャビティ １４ 摺動部 １５ 真空チャンバー １６ ブローピン １７ 接触面 REFERENCE SIGNS LIST 1 resin hollow molded product 2 main layer 3 decorative film layer 4 foam 5 resin extrusion head 6 sheet parison 7 decorative sheet 8 pressure roll 9 decorative parison 10 annular resin path 11 filling member 12 split mold 13 cavity 14 slide Moving part 15 Vacuum chamber 16 Blow pin 17 Contact surface
Claims (6)
ート状パリソンのうち、少なくとも一方のシート状パリ
ソンをその外側に装飾シートとを対向させて密着させた
加飾パリソンとしてキャビティの周囲に突出可能な摺動
部を備えた分割金型間に配置し、上記摺動部を突出させ
てその端面を前記シート状パリソンに接触させて、シー
ト状パリソンと分割金型のキャビテイとの間を閉じた空
間を形成する状態としたうえ、分割金型のキャビティ面
から上記空間内の空気を真空吸引して、上記シート状パ
リソンを分割金型のキャビティ面に密着させ、前記突出
させた摺動部を後退させながら分割金型を締めてキャビ
ティの周囲を互いに密着させてピンチオフ部を形成し、
次いでシート状パリソンの内部に圧力流体を導入して樹
脂中空成形品をブロー成形することを特徴とする樹脂中
空成形品のブロー成形方法。At least one of a pair of sheet parisons extruded from a resin extrusion head can protrude around a cavity as a decorative parison in which a decorative sheet is opposed to and in close contact with a decorative sheet. A space closed between the sheet-shaped parison and the cavity of the split mold by disposing between the divided molds having a sliding part, projecting the sliding part, and bringing its end face into contact with the sheet-shaped parison. Is formed, and the air in the space is vacuum-evacuated from the cavity surface of the split mold to bring the sheet-shaped parison into close contact with the cavity surface of the split mold, and the protruding sliding portion is retracted. Tighten the split mold while making the periphery of the cavity adhere to each other to form a pinch-off part,
Subsequently, a pressure fluid is introduced into the inside of the sheet-shaped parison to blow-mold the resin hollow molded article.
の外側に装飾シートとを対向させて密着させた加飾パリ
ソンは、圧着ロールにより互いに圧着して形成されるこ
とを特徴とする請求項１記載の樹脂中空成形品のブロー
成形方法。2. The decorative parison in which at least one sheet-like parison is closely adhered to the outer side of the parison with a decorative sheet facing the decorative parison, is formed by crimping each other with a crimping roll. Blow molding method for resin hollow molded products.
り開いてシート状に形成することを特徴とする請求項１
または２記載の樹脂中空成形品のブロー成形方法。3. The sheet-shaped parison is formed by cutting out an annular parison to form a sheet.
Or the blow molding method of the resin hollow molded article according to 2.
質であることを特徴とする請求項１または２記載の樹脂
中空成形品のブロー成形方法。4. The blow molding method for a resin hollow molded article according to claim 1, wherein the sheet parison and the decorative sheet are made of the same material.
石目模様、または光沢面を有することを特徴とする請求
項１、２、３または４記載の樹脂中空成形品のブロー成
形方法。5. The decorative sheet may be a wood grain pattern, a marble pattern,
5. The blow molding method for a resin hollow molded product according to claim 1, wherein the method has a stone pattern or a glossy surface.
とを特徴とする請求項１、２、３、４または５記載の樹
脂中空成形品のブロー成形方法。6. The blow molding method for a resin hollow molded article according to claim 1, wherein the decorative sheet is partly cloth-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2291799A JP4270624B2 (en) | 1999-01-29 | 1999-01-29 | Blow molding method for resin hollow molding products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2291799A JP4270624B2 (en) | 1999-01-29 | 1999-01-29 | Blow molding method for resin hollow molding products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000218684A true JP2000218684A (en) | 2000-08-08 |
| JP4270624B2 JP4270624B2 (en) | 2009-06-03 |
Family
ID=12096006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2291799A Expired - Lifetime JP4270624B2 (en) | 1999-01-29 | 1999-01-29 | Blow molding method for resin hollow molding products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4270624B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003071912A (en) * | 2001-08-31 | 2003-03-12 | Kyoraku Co Ltd | Blow molding method for resin hollow molded article |
| WO2004007183A1 (en) * | 2002-07-12 | 2004-01-22 | Basell Polyolefine Gmbh | Giuding of a cut-open parison |
| JP2006068930A (en) * | 2004-08-31 | 2006-03-16 | Kyoraku Co Ltd | Manufacturing method of composite molded product |
| JP2011025696A (en) * | 2009-06-30 | 2011-02-10 | Kyoraku Co Ltd | Blow molding mold and blow molding method |
| JP2011073422A (en) * | 2009-09-30 | 2011-04-14 | Kyoraku Co Ltd | Molding method |
| JP2011073364A (en) * | 2009-09-30 | 2011-04-14 | Kyoraku Co Ltd | Method for molding resin molding |
| JP2011255531A (en) * | 2010-06-07 | 2011-12-22 | Kyoraku Co Ltd | Method for manufacturing resin laminated sheet including inner rib |
| WO2012036588A1 (en) * | 2010-09-13 | 2012-03-22 | Postovalov Boris Vladimirovich | Internal chamber of a product line of refrigerators, die and method for the vacuum forming of a chamber of this type |
| KR101258514B1 (en) * | 2010-11-19 | 2013-04-26 | 광 지 진 | Manufacture Method and Structure of press |
| US8617344B2 (en) | 2002-07-12 | 2013-12-31 | Basell Polyolefine Gmbh | Multistage process for producing hollow plastic articles from half shells |
-
1999
- 1999-01-29 JP JP2291799A patent/JP4270624B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003071912A (en) * | 2001-08-31 | 2003-03-12 | Kyoraku Co Ltd | Blow molding method for resin hollow molded article |
| WO2004007183A1 (en) * | 2002-07-12 | 2004-01-22 | Basell Polyolefine Gmbh | Giuding of a cut-open parison |
| US7556489B2 (en) | 2002-07-12 | 2009-07-07 | Basell Polyolefine Gmbh | Guiding of a cut-open parison |
| US8617344B2 (en) | 2002-07-12 | 2013-12-31 | Basell Polyolefine Gmbh | Multistage process for producing hollow plastic articles from half shells |
| JP2006068930A (en) * | 2004-08-31 | 2006-03-16 | Kyoraku Co Ltd | Manufacturing method of composite molded product |
| JP4689213B2 (en) * | 2004-08-31 | 2011-05-25 | キョーラク株式会社 | Manufacturing method of composite molded product |
| JP2011025696A (en) * | 2009-06-30 | 2011-02-10 | Kyoraku Co Ltd | Blow molding mold and blow molding method |
| JP2011073422A (en) * | 2009-09-30 | 2011-04-14 | Kyoraku Co Ltd | Molding method |
| JP2011073364A (en) * | 2009-09-30 | 2011-04-14 | Kyoraku Co Ltd | Method for molding resin molding |
| JP2011255531A (en) * | 2010-06-07 | 2011-12-22 | Kyoraku Co Ltd | Method for manufacturing resin laminated sheet including inner rib |
| WO2012036588A1 (en) * | 2010-09-13 | 2012-03-22 | Postovalov Boris Vladimirovich | Internal chamber of a product line of refrigerators, die and method for the vacuum forming of a chamber of this type |
| KR101258514B1 (en) * | 2010-11-19 | 2013-04-26 | 광 지 진 | Manufacture Method and Structure of press |
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| Publication number | Publication date |
|---|---|
| JP4270624B2 (en) | 2009-06-03 |
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