JPS61227017A - Manufacture of blow molded body by blowing gas and device thereof - Google Patents
Manufacture of blow molded body by blowing gas and device thereofInfo
- Publication number
- JPS61227017A JPS61227017A JP60068818A JP6881885A JPS61227017A JP S61227017 A JPS61227017 A JP S61227017A JP 60068818 A JP60068818 A JP 60068818A JP 6881885 A JP6881885 A JP 6881885A JP S61227017 A JPS61227017 A JP S61227017A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- molded body
- pipe
- cooling
- hollow 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.)
- 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
- B29C49/66—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
- B29C2049/6607—Flushing blown articles
- B29C2049/6646—Flushing blown articles while keeping the final blowing pressure in 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C49/06—Injection blow-moulding
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はガス体吹込みによる中空成形体の製造方法およ
びその装置に関する。１対の半割状金型間に挾持された
成形材料内にガス体を圧入して成形材料の金型の凹状内
壁面への膨張圧接手段により製せられる中空成形物は、
例えば自動車用アームレスト、ヘッドレストなどにその
具体例を見るごとく、各産業分野において多用されてい
る。しかしこの中空成形体の成形後の冷却処理にはその
特殊形状とも関連して時間を要し、特に大きな容量の空
気層をそれ自体内存せしめる布地あるいは発泡層をその
構成材の一部として使用した中空成形体にあってはその
冷却処理には時間を要し、又残留熱の不完全は排出にあ
っては成形物の変形などはその後の中空成形品の外観を
損う結果となる。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method and apparatus for manufacturing a hollow molded body by gas injection. A hollow molded article is produced by pressurizing a gas into a molding material held between a pair of half-shaped molds and applying expansion pressure welding of the molding material to the concave inner wall surface of the mold.
For example, they are widely used in various industrial fields, such as armrests and headrests for automobiles. However, the cooling process after molding of this hollow molded body takes time due to its special shape, and it is especially difficult to use a fabric or foam layer that contains a large volume of air space as part of its constituent material. In the case of a hollow molded product, it takes time to cool it down, and incomplete discharge of residual heat may cause deformation of the molded product, which may impair the appearance of the subsequent hollow molded product.
本発明はガス体吹込みによる中空成形体の製造方法およ
びその製造装置にあって特に中空成形後の効率的な冷却
処理を意図して提案されたものである。The present invention relates to a method for producing a hollow molded body by blowing a gaseous body and an apparatus for producing the same, and has been proposed particularly with the intention of efficient cooling treatment after blow molding.
（従来の技術）
一般のガス体の吹込み中空成形法は熱可塑性合性樹脂製
の押出しダイより押出されたパリソンを１対の半割状金
型間に導き、上記金型の閉型後、パリソン内に圧縮空気
を導入して、パリソンを膨張拡大せしめ、金型の凹状内
壁面形状に一致した中空体を成形後、この成形体を冷却
固化させて中空成形品を完成せしめている。(Prior art) In the general gas blow molding method, a parison extruded from an extrusion die made of thermoplastic resin is guided between a pair of half-shaped molds, and after the molds are closed, Compressed air is introduced into the parison to expand and expand the parison to form a hollow body that matches the shape of the concave inner wall of the mold, and then the formed body is cooled and solidified to complete the hollow molded product.
ところで今日、上記成形手段により生産される中空成形
品として塩化ビニル樹脂層の表面に布地を接着せしめた
もの、あるいＩ／ｉ塩化ビニル樹脂層の内面に発泡層を
積層状に一体形成したものなどの複合表皮中空成形体の
ガス体吹込みによる成形法が提案され、これら仕上処理
として困難を伴う冷却処理の一手段として金型内に冷却
水と流入せしめる方法が特開昭５５−１５６０３２号公
報において開示されている。By the way, today, as hollow molded products produced by the above-mentioned molding method, there are products in which fabric is adhered to the surface of a vinyl chloride resin layer, or products in which a foam layer is integrally formed in a laminated manner on the inner surface of an I/i vinyl chloride resin layer. A molding method using gas injection for composite skin hollow molded bodies has been proposed, and Japanese Patent Laid-Open No. 55-156032 discloses a method of flowing cooling water into the mold as a means of cooling treatment, which is difficult as a finishing treatment. Disclosed in the official gazette.
（発明が解決しようとする問題点）
中空成形体はその形状の面より最終仕上処理としての成
形品の冷却作業には時間を要し、特に上述した複合表皮
の中空成形体の場合、布と金型との界面間の布地起毛部
に存在する空気層のため、あるいけ積層体の一部を構成
する発泡層中に内在する空気のため熱伝導率が極端に低
下し、単に金型部の冷却処理によっては複合表皮の中空
成形体の実質的冷却には不十分であり、この不十分かつ
不完全な冷却処理しか実行されない中空成形体は脱型時
に変形しやすく、又脱型後も残留熱の放散に伴い中空成
形体は萎縮変形する危険性が高く、これら問題点の解消
のため金型の冷却時間を十分とらねばならず、このこと
はとりもなおさず成形時間の長期化となり、中空製品の
成形サイクルが長くなり、作業効率の面で強く解決が求
められている問題点の一つであった。(Problems to be Solved by the Invention) Due to the shape of the hollow molded product, it takes time to cool the molded product as a final finishing treatment, and especially in the case of the above-mentioned composite skin hollow molded product, it takes a long time to cool down the molded product due to its shape. Due to the air layer existing in the fabric raised area between the interface with the mold, the thermal conductivity is extremely reduced due to the air inherent in the foam layer that makes up a part of the laminate. Depending on the cooling treatment, it is insufficient to substantially cool the hollow molded body with the composite skin, and the hollow molded body for which only this insufficient and incomplete cooling treatment is performed is likely to deform during demolding, and even after demolding. There is a high risk that the hollow molded body will shrink and deform due to the dissipation of residual heat, and in order to solve these problems, it is necessary to allow sufficient time for the mold to cool down, which in turn lengthens the molding time. , the molding cycle for hollow products is becoming longer, which is one of the problems that strongly requires a solution in terms of work efficiency.
本発明は上記問題点の解決に向けられたもので、特にガ
ス体の吹込み成形後の中空成形体の冷却処理の簡易化、
短縮化により成形作業の効率化を意図したものである。The present invention is directed to solving the above-mentioned problems, and in particular, simplifies the cooling process of the hollow molded body after blow molding the gas body.
The aim is to improve the efficiency of molding work by shortening the length.
（問題点を解決するための手段）
本発明の第１の発明のガス体吹込みによる中空成形体の
製造法の構成は成形材料を１対の半割状金型間に位置せ
しめての型締後、成形材料内にガス体を圧入して成形材
料を金型の凹状内壁面に膨張圧接せしめてなる中空成形
体の製造方法において、ガス体の圧入後、冷却用がヌ体
と中空成形体内に導入する作業と、中空成形体内部のガ
ス体を強制的に成形体外に排出する作業を並行して行う
ことを特徴とし、中空成形体々内の昇温したガス体を強
制脱気せしめつつ冷却ガス体を中空成形体に供給し、効
率的な中空成形体の冷却処理を意図したものであシ、又
第２の発明のガス体吹込みによる中空成形体の製造装置
は１対の半割状金型にて挾持される成形材料内には吹込
用ガス体導入パイプ、冷却用ガス体導入パイプおよびガ
ス体導出パイプが連通している構造よりなり、中空成形
体の成形・冷却作業を連続的に、さらに並行して実行し
、作業能率と装置自体の機構の簡素化を意図したもので
ある。(Means for Solving the Problems) The method for manufacturing a hollow molded body by gas injection according to the first aspect of the present invention has a structure in which a molding material is placed between a pair of half-shaped molds. In a method for manufacturing a hollow molded body, in which a gas body is press-fitted into the molding material after tightening, and the molding material is brought into contact with the concave inner wall surface of the mold by expansion pressure, after the gas body is press-fitted, the cooling body and the hollow molding are It is characterized in that the work of introducing the gas into the body and the work of forcibly discharging the gas inside the hollow molded body to the outside of the molded body are performed in parallel, and the heated gas inside the hollow molded bodies is forcibly degassed. The device is intended for efficient cooling of the hollow molded body by supplying a cooling gas body to the hollow molded body while the cooling gas body is supplied to the hollow molded body. The molding material held in the half-split mold has a structure in which a blowing gas introduction pipe, a cooling gas introduction pipe, and a gas discharge pipe communicate with each other, making it possible to form and cool hollow molded bodies. It is intended to execute these processes continuously and in parallel, increasing work efficiency and simplifying the mechanism of the device itself.
（実施例）
つぎに本発明の吹込み成形による中空成形体の成形方法
とその成形方法を実施するための具体的装置を図面を用
いて説明する。(Example) Next, a method of molding a hollow molded body by blow molding of the present invention and a specific apparatus for carrying out the molding method will be described with reference to the drawings.
第１図は本発明の製造方法実施時の閉型直前の状態を示
す製造装置の概略縦断面図、第２図は同じく閉型した状
態における冷却処理工程時の製造装置の概略縦断面図で
ある。左右１対のローラ（２）（２）にロール巻きさ、
れたポリエステル、ナイロン等の混紡糸を用いてジャー
ジ編などの手段をもって編み上げられた伸縮性を有する
布地（１）（１）はローラ（２）（２）より引き出され
てガイドローラ（３Ｘ３）を経て各凹状面（４）を対面
せしめ、かつ所定の間隔を保って設置された半割状の１
対をもって１組とする吹込み成形用金型（５）（５）間
に懸吊状に垂下され、布地（１）（１）の自由端部は１
対の金型（５）（５）に取付けられ、背部よりばね（６
）に押されて金型の内向き内壁面より心持ち突出した状
態にあるヌライド可能な把持部材（７）（７）にそれぞ
れ把持されている。この布地（１）は１対の金型（５）
（５）間に垂下される過程にてガイドローラ（３） （
３）間にあって、その上方に位置する加熱装置（８）、
例えば赤外線ヒータ、超音波、高周波あるいけ通常の電
熱ヒータなどにて１０〜３０秒間加熱され、布地の表面
温度４０°〜６０°Ｃに処理される。尚この布地（１）
が特に塑性変形タイプの場合はその表面温度は１４０°
〜１９０℃に処理される。FIG. 1 is a schematic vertical cross-sectional view of the manufacturing apparatus showing a state immediately before closing the mold when implementing the manufacturing method of the present invention, and FIG. 2 is a schematic vertical cross-sectional view of the manufacturing apparatus during the cooling process in the closed mold state. be. Rolled around a pair of left and right rollers (2) (2),
A stretchable fabric (1) (1) knitted using a blended yarn of polyester, nylon, etc. using a method such as jersey knitting is pulled out from rollers (2) (2) and passed through a guide roller (3 x 3). A half-split 1 is installed with each concave surface (4) facing each other and with a predetermined interval maintained.
The fabrics (1) (1) are suspended between pairs of blow molding molds (5) (5), and the free ends of the fabrics (1) (1) are 1
It is attached to the pair of molds (5) (5), and the spring (6
), and are held by gripping members (7) (7) which are capable of sliding, and are in a state of protruding from the inwardly facing inner wall surface of the mold. This fabric (1) has a pair of molds (5)
(5) Guide roller (3) (
3) a heating device (8) located between and above;
For example, the fabric is heated for 10 to 30 seconds using an infrared heater, ultrasonic wave, high frequency, or ordinary electric heater to bring the surface temperature of the fabric to 40° to 60°C. Furthermore, this fabric (1)
In particular, if it is of the plastic deformation type, its surface temperature is 140°.
~190°C.
また伸縮性を有する布地（１）としては他にポリエステ
ル、ナイロン、アクリル系などの織物、編物が採用でき
、これら布地の構成糸としては混紡糸あるいは捲縮加工
糸が使用される。In addition, as the stretchable fabric (1), woven or knitted fabrics of polyester, nylon, acrylic, etc. can be used, and the constituent yarns of these fabrics are blended yarns or crimped yarns.
尚、布地（１）としての構成は上述した織物あるいは編
物に限定されるものではなく、伸度１５０％以上の異方
性のない布地であれば最適である。The structure of the fabric (1) is not limited to the above-mentioned woven or knitted fabric, but any fabric with an elongation of 150% or more and no anisotropy is most suitable.
半割状金型（５）（５）間に垂下した１対の布地（１）
（１）間には押出ダイαＱから押出された熱可塑性合成
樹脂製のパリソンαｐが同じく懸吊状に垂下しており、
このパリソンαυは塩化ビニル、ナイロン、ポリエチレ
ン、ポリプロピレンなど熱融着性に優れた素材から適宜
選択される。A pair of fabrics (1) hanging between the half-split molds (5) (5)
(1) In between, a parison αp made of thermoplastic synthetic resin extruded from an extrusion die αQ also hangs in a suspended manner.
This parison αυ is appropriately selected from materials with excellent heat-sealability such as vinyl chloride, nylon, polyethylene, and polypropylene.
懸吊状のパリソンαυの下方部には組合された１対の金
型（５）（５）内部に挿入されるガス制御機構が配置さ
れている。即ちガス体導入パイプ（ｌＩ→とがス体導出
パイプ（ト）が組立てられた金型（５）（５）の突き合
せ面位置より金型のキャビティ内に連通するよう挿込れ
る。At the lower part of the suspended parison αυ, a gas control mechanism is arranged to be inserted into the combined pair of molds (5) (5). That is, the gas body inlet pipe (lI→) and the gas body outlet pipe (g) are inserted into the mold cavity from the abutting surfaces of the assembled molds (5) (5) so as to communicate with each other.
前記がヌ体導入パイプＱ◆は金型（５）内への挿入前の
個所にて分岐して、パリソンＱηおよび布地（１）を膨
張させるガス流量調整用バルブ（ｖｌ）を介在せしめた
吹込用ガス体導入パイプ（６）と中空成形体を冷却せし
めるガス流量調整用バルブ（ｖ２）を介在せしめた冷却
用ガス導入パイプ（至）となり、一方前記ガス体導入パ
イプ＠は金型（５）への挿入個所にて、ガス流量調整用
バルブ（ＶＲ）を介在せしめた前記ガス体導出パイプａ
Ｑ内に同心状に挿入され、機構の簡素化を図っている。The body introduction pipe Q◆ is branched at a point before insertion into the mold (5), and a gas flow rate regulating valve (vl) is interposed to inflate the parison Qη and the fabric (1). The cooling gas introduction pipe (6) is interposed with a gas flow rate adjustment valve (v2) for cooling the hollow molded body, and the gas body introduction pipe @ is connected to the mold (5). The gas body outlet pipe a has a gas flow rate adjustment valve (VR) interposed at the insertion point into the gas body outlet pipe a.
It is inserted concentrically into Q to simplify the mechanism.
なおこの折、両パイプに）（至）を統合したガス体導入
パイプａ４のノズルａηはガス体導出パイプＱ５のノズ
ルαπより心持ち突出した状態に構成配置されている。At this time, the nozzle aη of the gas inlet pipe a4, which is integrated with both pipes, is arranged so as to project more than the nozzle απ of the gas outlet pipe Q5.
勿論両ガス体の導入、導出向パイプθａＱＱをそれぞれ
別個に金型（５）内に連通せしめる構造としてもよい。Of course, it is also possible to have a structure in which the inlet and outlet pipes θaQQ for both gas bodies are communicated separately into the mold (5).
又１対の金型（５）（５）内には金型の凹状面（４）を
全面カバーする形にて、金型加熱兼冷却用管（９）が配
管され、さらに金型の凹状面（４）に一端を開口して凹
状面（４）Ｋ散在する形にて複数の吸引ダクト（図示省
略）を付設配管せしめることによりパリソンαηおよび
布地（１）の金型凹状面への密着度を助長せしみること
ができる。In addition, a mold heating/cooling pipe (9) is installed inside the pair of molds (5) so as to completely cover the concave surface (4) of the mold. The parison αη and the fabric (1) are brought into close contact with the concave surface of the mold by installing a plurality of suction ducts (not shown) with one end open on the surface (4) and dispersing the concave surface (4) K. You can try to improve your degree.
（作用）
上記構造の装置にあって、懸吊状の１対の布地（ＩＸＩ
）および円筒状のパリソンαυを挾持しつつ、加熱兼冷
却用管（９）をもって、あるいは金型（５）の外側部に
設置した加熱装置にて温度８０°Ｃ以下に設定された１
対の金型（５）（５）を閉型する折、パリソンａυの下
方よりガス体導入パイプ（Ｊ４およびガス体導出パイプ
（至）を挿入し、これら両パイプαθの先端ノズルαつ
部を１対の金型（５）（５）の凹状キャビティ部に連通
せしめる。吹込用ガス体導入パイプ（６）のバルブ（■
１）のみを開放し、他のパイプ（１３ＧＧに介在せしめ
た各バルブ（Ｖ ２ ） （ＶＲ）を閉鎖して、吹込用
ガス体導入パイプα邊より１〜６ｊＣ９／Ｃｄ、好まし
くは３〜５ｋｇ／ａｌｌ の圧縮空気を金型キャビティ
内に噴出する。これによりパリソンθυおよび布地（Ｉ
ン（１）は外方に大きく膨張し、１対の半割状金型（５
Ｘ５）の組合せによりその内部に目的とする中空成形体
（至）の外形に一致するべく形成されたキャビテイ面（
凹状面（４）（４） ）に圧接密着させる。なお、この
折各金型（５）（５）に付設せしめた吸引ダクト（図示
省略）を介して、パリソンＱｌ）および布地（１）を金
型凹状面に強力に吸着せしめることにより、前記吹込用
ガス体によるパリソンＯυなどの金型凹状面への密着効
果を一段と助長せしめることができる。(Function) In the device having the above structure, a pair of suspended fabrics (IXI
) and the cylindrical parison αυ, the temperature was set to 80°C or less with the heating/cooling pipe (9) or with a heating device installed on the outside of the mold (5).
When closing the pair of molds (5) and (5), insert the gas inlet pipe (J4) and the gas outlet pipe (to) from below the parison aυ, and insert the tip nozzle α of both pipes αθ. Connect the concave cavities of the pair of molds (5) (5).The valve (■) of the blowing gas introduction pipe (6)
1) and close the other pipes (V 2 ) (VR) interposed in 13GG, 1 to 6jC9/Cd, preferably 3 to 5kg, from the blown gas introduction pipe α side. /all of compressed air is injected into the mold cavity.This causes the parison θυ and the fabric (I
The ring (1) expands outward and a pair of half-split molds (5
By combining X5), a cavity surface (
Press and adhere closely to the concave surface (4) (4). At this time, the parison Ql) and the fabric (1) are strongly attracted to the concave surface of the mold through suction ducts (not shown) attached to each of the molds (5) (5). This can further enhance the effect of the gas body on the concave surface of the mold such as the parison Oυ.
なおこのパリソンαυなどの金型凹状面への圧着時にお
ける金型温度は８０°Ｃ以下に設定されていることが望
ましく、金型温度が８０°Ｃ以上となるとパリソンαυ
を構成する熱可塑性樹脂の一部が布地（１）の表面に滲
出して中空成形体の外観を損う弊害が発生する。パリソ
ンαηなどの膨張作業の終了後、金型（５Ｘ５）内の冷
却用管（９）内には冷却水を流入せしめ、金型（５）の
温度を調整し、中空成形体（ト）を外部より冷却する。It is desirable that the mold temperature be set to 80°C or less when pressing the parison αυ to the concave surface of the mold.If the mold temperature is 80°C or higher, the parison αυ
A part of the thermoplastic resin constituting the fabric (1) oozes out onto the surface of the fabric (1), resulting in an adverse effect that impairs the appearance of the hollow molded article. After the expansion work of the parison αη, etc., cooling water is allowed to flow into the cooling pipe (9) in the mold (5×5) to adjust the temperature of the mold (5), and the hollow molded body (G) is heated. Cooled from the outside.
と同時に、吹込用ガス体導入パイプ＠のバルブ（ｖｌ）
を閉じ、冷却用がヌ体導入パイプα１のバルブ（Ｖ２）
およびガス体導出パイプσ〜のバルブ（ＶＲ）ヲ開いて
冷却用ガス体導入パイプσ１より圧力１〜４ｋｇ１ｃｄ
ｌ 。At the same time, the valve (vl) of the gas introduction pipe for blowing
Close the valve (V2) of the body introduction pipe α1 for cooling.
Then, open the valve (VR) of the gas body outlet pipe σ and apply a pressure of 1 to 4 kg 1 cd from the cooling gas body introduction pipe σ1.
l.
温度−６０°〜５°Ｃ範囲に設定した冷却空気又は窒素
ガスなどを中空成形体（至）内に圧入すると共に中空成
形体（ト）内に内在する冷却ガス体を導出パイプαＧを
用いて外部へ吸引放出し、中空成形体を内部からも併せ
冷却せしめる。尚この冷却ガス体の注入は中空成形体（
至）の形状保持安定に大いに貢献している。Cooling air or nitrogen gas, etc. set at a temperature in the range of -60° to 5°C, is press-injected into the hollow molded body (to), and the cooling gas body present in the hollow molded body (g) is discharged using the outlet pipe αG. It is sucked and discharged to the outside, and the hollow molded body is also cooled from the inside. The injection of this cooling gas is carried out in the hollow molded body (
This greatly contributes to the stable shape retention of
中空成形体（至）の温度が略３０°〜６０°Ｃに低下し
た時点にて、中空成形体（至）は脱型されるが、この程
度まで温度の低下があると中空成形体の材質は直接的に
潜熱の影響を受けることが少なく、脱型後の中空成形体
の残留熱が発散することにより緩やかに進行する成形体
の冷却時にも極端な変形現象の発生はない。The hollow molded body (to) is demolded when the temperature of the hollow molded body (to) falls to approximately 30° to 60°C, but if the temperature decreases to this extent, the material of the hollow molded body may deteriorate. is not directly affected by latent heat, and extreme deformation does not occur even when the molded product is cooled slowly due to the residual heat of the hollow molded product dissipating after demolding.
以上の説明は専ら布地をもって表面を被覆した樹脂製中
空成形体の製造に関連して記述したが、勿論この中空成
形体としてはスキン層の内面に発泡層を積層した複合中
空成形体、又は熱可塑性樹脂製単層中空成形体など広範
囲の中空成形体の製造に関して適用されるものである。The above explanation has been made in relation to the manufacture of a resin hollow molded body whose surface is covered with cloth, but of course, this hollow molded body may be a composite hollow molded body in which a foam layer is laminated on the inner surface of a skin layer, or a thermoplastic hollow molded body. It is applicable to the production of a wide range of hollow molded bodies, including single-layer hollow molded bodies made of plastic resin.
（発明の効果）
本発明は仕上げ工程にあってその冷却処理の比較的困難
な中空成形体、特に空気層をそれ自体内蔵せしめて冷却
処理の難しい布地層又は発泡層をその一部に形成した複
合層からなる中空成形体にあって、金型に設けた冷却用
管を用いての外部からの冷却処理と共に、中空成形体内
部のガス体を強制吸引脱気しながら、冷却加圧ガス体を
中空成形体内に注入することにより成形体々内のガス体
の流通は促進され、その冷却効果は増大し、又中空成形
体の内外両面よりの迅速な冷却処理により作業能率を促
進でき、又中空成形体内に圧入される冷却用ガス体の注
入は成形体の迅速な冷却処理と伴せ、この圧ガスの注入
は成形体を金型内面にさらに強力に密着せしめこれによ
り中空成形体の変形防止、脱型後の保形に大きく貢献す
るものである。(Effects of the Invention) The present invention provides a hollow molded body which is relatively difficult to cool during the finishing process, and in particular, has an air layer built-in to form a fabric layer or a foam layer that is difficult to cool. A hollow molded body consisting of a composite layer is cooled from the outside using a cooling pipe installed in the mold, and the gas inside the hollow molded body is forcibly suctioned and degassed to cool the pressurized gas body. By injecting the gas into the hollow molded bodies, the flow of the gas inside the molded bodies is promoted, the cooling effect is increased, and the work efficiency can be promoted by rapid cooling treatment from both the inside and outside of the hollow molded bodies. The injection of the cooling gas into the hollow molded body is accompanied by a rapid cooling process of the molded body, and the injection of this pressurized gas causes the molded body to adhere more tightly to the inner surface of the mold, thereby preventing the deformation of the hollow molded body. This greatly contributes to prevention and shape retention after demolding.
又装置面にあってはガス体の導入および導出パイプをし
て同心状の一体化ノズルとすることにより装置自体の機
構は簡素化でき、又脱型後の成形体にあって、パイプの
痕跡は最小限にとどめることができ、その後の閉鎖処理
などもその手数を軽減できる。又冷却用ガス体導入パイ
プの先端部とガス体導出パイプの先端部より、より中空
成形体内に突出せしめた構造とすることにより、冷却用
ガス体の無駄のない有効利用ができ、ガス体の導出パイ
プをもっての中空成形体内部よりの強制脱気は冷却処理
の目的を果したガス体のみを確実に外部に吸引放出でき
る。In terms of equipment, the mechanism of the equipment itself can be simplified by making the gas introduction and exit pipes into a concentric integrated nozzle, and there are no traces of the pipes on the molded product after demolding. can be kept to a minimum, and the trouble of subsequent closure processing can also be reduced. In addition, by making the tip of the cooling gas inlet pipe and the tip of the gas outlet pipe protrude further into the hollow molded body, the cooling gas can be used effectively without wasting it. Forced degassing from the inside of the hollow molded body using the outlet pipe ensures that only the gas that has served the purpose of cooling treatment can be sucked and discharged to the outside.
第１図は本発明に係る中空成形体の製造方法実施時の閉
型直前の状態を示す装置の概略縦断面図、第２図は同じ
く閉型した状態における冷却処理工程時の製造装置の概
略縦断面図である。
図中、（ＩＸＩ）は布地、（４）は金型凹状面、（５）
（５）Ｈ半割状金型、（９）は加熱兼冷却用管、ａυは
パリソン、＠は吹込用ガス体導入パイプ。α［有］は冷
却用がヌ体導入パイプ、α４１はガス体導入パイプ、α
Ｑはガス体導出パイプ、（ｖｌ）（Ｖ２）（ｖＲ）ハハ
ルブ、Ｑ７）Ｑ７）’Ｕノズル、（至）は中空成形体を
示す。FIG. 1 is a schematic vertical cross-sectional view of the apparatus showing the state immediately before closing the mold when carrying out the method for manufacturing a hollow molded body according to the present invention, and FIG. 2 is a schematic longitudinal sectional view of the manufacturing apparatus during the cooling treatment process in the closed mold state. FIG. In the figure, (IXI) is the fabric, (4) is the concave surface of the mold, (5)
(5) H half-shaped mold, (9) is a heating and cooling pipe, aυ is a parison, and @ is a gas introduction pipe for blowing. α [Yes] has a cooling body introduction pipe, α41 has a gas body introduction pipe, α
Q indicates a gas outlet pipe, (vl) (V2) (vR) haharub, Q7) Q7)'U nozzle, and (to) a hollow molded body.
Claims (5)
型締後、成形材料内にガス体を圧入して成形材料を金型
の凹状内壁面に膨張圧接せしめてなる中空成形体の製造
方法において、ガス体の圧入後、冷却用ガス体を中空成
形体内に導入する作業と、中空成形体内部のガス体を強
制的に成形体外に排出する作業を並行して行うことを特
徴とするガス体吹込みによる中空成形体の製造方法。(1) After the molding material is placed between a pair of half-split molds and the molds are clamped, a gas is injected into the molding material to cause the molding material to expand and press into contact with the concave inner wall surface of the mold. In a method for manufacturing a molded body, after the gas body is press-fitted, the work of introducing a cooling gas body into the hollow molded body and the work of forcibly discharging the gas body inside the hollow molded body to the outside of the molded body are carried out in parallel. A method for producing a hollow molded body by blowing a gas body, characterized by:
吹込用ガス体導入パイプ、冷却用ガス体導入パイプおよ
びガス体導出パイプが連通しているガス体吹込みによる
中空成形体の製造装置。(2) Inside the molding material, which is held between a pair of half-split molds, there is a hollow space created by blowing gas into which a gas introduction pipe for blowing, a gas introduction pipe for cooling, and a gas delivery pipe are connected. Molded body manufacturing equipment.
導入パイプは半割状金型への挿入個所にては一本のガス
体導入パイプに統合されている特許請求の範囲第２項記
載のガス体吹込みによる中空成形体の製造装置。(3) The blowing gas introduction pipe and the cooling gas introduction pipe are integrated into a single gas introduction pipe at the insertion point into the half-split mold. A device for producing hollow molded bodies by blowing gas into the body.
のノズル部分は金型への挿入個所にてガス体導出パイプ
内に同心状に挿装されている特許請求の範囲第３項記載
のガス体吹込みによる中空成形体の製造装置。(4) The nozzle portion of the gas body introduction pipe integrated into the single pipe is inserted concentrically into the gas body outlet pipe at the insertion point into the mold. A device for producing hollow molded bodies by blowing gas into the body.
のノズルはガス体導出パイプのノズル部分より突出状態
に挿装されている特許請求の範囲第４項記載のガス体吹
込みによる中空成形体の製造装置。(5) The nozzle of the gas body inlet pipe integrated into the one pipe is inserted in a protruding state from the nozzle portion of the gas body outlet pipe, and the hollow space is formed by blowing the gas body according to claim 4. Molded body manufacturing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60068818A JPS61227017A (en) | 1985-04-01 | 1985-04-01 | Manufacture of blow molded body by blowing gas and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60068818A JPS61227017A (en) | 1985-04-01 | 1985-04-01 | Manufacture of blow molded body by blowing gas and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61227017A true JPS61227017A (en) | 1986-10-09 |
Family
ID=13384673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60068818A Pending JPS61227017A (en) | 1985-04-01 | 1985-04-01 | Manufacture of blow molded body by blowing gas and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61227017A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63218332A (en) * | 1987-03-09 | 1988-09-12 | Beishin Kogyo Kk | Method for blow molding synthetic resin |
| US5194212A (en) * | 1990-12-18 | 1993-03-16 | Ford Motor Company | Method of manufacturing a fiber-reinforced structure having a hollow blow-molding core |
| EP0760737A1 (en) * | 1995-03-27 | 1997-03-12 | Kurt H. Ruppman, Sr. | Method of making a molded plastic container |
| US5885515A (en) * | 1997-03-06 | 1999-03-23 | Lear Corporation | Blow molding process |
| JP2012006198A (en) * | 2010-06-23 | 2012-01-12 | Kyoraku Co Ltd | Method of manufacturing hollow foamed molding, and the hollow foamed molding |
-
1985
- 1985-04-01 JP JP60068818A patent/JPS61227017A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63218332A (en) * | 1987-03-09 | 1988-09-12 | Beishin Kogyo Kk | Method for blow molding synthetic resin |
| JPH0566852B2 (en) * | 1987-03-09 | 1993-09-22 | Beishin Kogyo Kk | |
| US5194212A (en) * | 1990-12-18 | 1993-03-16 | Ford Motor Company | Method of manufacturing a fiber-reinforced structure having a hollow blow-molding core |
| EP0760737A1 (en) * | 1995-03-27 | 1997-03-12 | Kurt H. Ruppman, Sr. | Method of making a molded plastic container |
| EP0760737A4 (en) * | 1995-03-27 | 1999-08-04 | Kurt H Ruppman Sr | Method of making a molded plastic container |
| CN1064892C (en) * | 1995-03-27 | 2001-04-25 | 大库尔特H·鲁普曼 | Method for making a molded plastic container |
| US5885515A (en) * | 1997-03-06 | 1999-03-23 | Lear Corporation | Blow molding process |
| JP2012006198A (en) * | 2010-06-23 | 2012-01-12 | Kyoraku Co Ltd | Method of manufacturing hollow foamed molding, and the hollow foamed molding |
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