JP2745830B2 - Method for manufacturing synthetic resin hollow structure - Google Patents
Method for manufacturing synthetic resin hollow structureInfo
- Publication number
- JP2745830B2 JP2745830B2 JP3012096A JP1209691A JP2745830B2 JP 2745830 B2 JP2745830 B2 JP 2745830B2 JP 3012096 A JP3012096 A JP 3012096A JP 1209691 A JP1209691 A JP 1209691A JP 2745830 B2 JP2745830 B2 JP 2745830B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- mold
- temperature control
- hollow structure
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、芯材を利用して中空
部を形成する合成樹脂製中空構造体の製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic resin hollow structure in which a hollow portion is formed using a core material.
【０００２】[0002]
【従来の技術】従来、図３に示すような金型１を用いた
合成樹脂製中空構造体の製造方法が知られている。2. Description of the Related Art Conventionally, there has been known a method for manufacturing a synthetic resin hollow structure using a mold 1 as shown in FIG.
【０００３】金型１は、上型２と下型３を有しており、
プリフォーム４ａ，４ｂとプリフォーム５との間に発泡
体からなる芯材６ａ，６ｂを挟み、更に、プリフォーム
５とプリフォーム７との間に発泡体からなる芯材８を挟
んで積層した積層体９を、上型２と下型３との間にセッ
トする。そして、上型２と下型３に温度調節用液（温調
液）を流して上型２と下型３の温度調節（温調）を行っ
た後、金型１内に合成樹脂を注入し、芯材６ａ，６ｂ及
び芯材８の該当部分が中空部を形成する合成樹脂製中空
構造体を成形している。[0003] A mold 1 has an upper mold 2 and a lower mold 3.
A core material 6a, 6b made of a foam is sandwiched between the preforms 4a, 4b and the preform 5, and a core material 8 made of the foam is sandwiched between the preform 5 and the preform 7. The laminate 9 is set between the upper mold 2 and the lower mold 3. Then, a temperature control liquid (temperature control liquid) is supplied to the upper mold 2 and the lower mold 3 to control the temperature of the upper mold 2 and the lower mold 3 (temperature control), and then the synthetic resin is injected into the mold 1. The core portions 6a and 6b and the core portion 8 form a hollow structure made of synthetic resin in which the corresponding portions form a hollow portion.
【０００４】このような発泡体からなる芯材を用いたも
のとして、特開昭５５-７６７７４号公報がある。[0004] Japanese Patent Application Laid-Open No. 55-76774 discloses a method using a core material made of such a foam.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の合成樹脂製中空構造体の製造方法にあって
は、中空部形成のための芯材６ａ，６ｂ及び芯材８が発
泡体となっていたため、合成樹脂の芯材６ａ，６ｂ及び
芯材８と接する面は温調ができなかった。つまり、発泡
体であるために、新たに空間を形成して内部に温調液を
流すための経路を設ける（例えば樹脂製ホースを装着す
る）必要があり、重量及びコストの増加を招くことが避
けられず温調がなされていなかった。However, in such a conventional method for manufacturing a synthetic resin hollow structure, the core members 6a and 6b and the core member 8 for forming the hollow portion are formed of a foam. As a result, the surfaces of the synthetic resin core members 6a and 6b and the core member 8 which contact the core member 8 could not be temperature-controlled. That is, since it is a foam, it is necessary to form a new space and provide a path for flowing the temperature control liquid therein (for example, to attach a resin hose), which may increase weight and cost. Inevitably, the temperature was not controlled.
【０００６】このため、二箇所の発泡体（芯材６ａ，６
ｂ及び芯材８）に挟まれた部分に位置する合成樹脂は全
く温調効果を得ることができず、成形不良を起こした
り、樹脂の浸透が遅くなって成形サイクルが長くなると
いう問題点があった。For this reason, two foams (core members 6a and 6
b) and the synthetic resin located in the portion sandwiched between the core materials 8) cannot attain a temperature control effect at all, which causes a problem that a molding failure occurs, and that the resin permeation becomes slow and a molding cycle becomes long. there were.
【０００７】この発明は、上記問題点に鑑みてなされた
ものであり、その目的とするところは、金型の中空部形
成部分であっても温調を可能として、成形不良を生じさ
せず、また、樹脂の浸透の遅延を防止して成形サイクル
の短縮を可能とする合成樹脂製中空構造体の製造方法を
提供することにある。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it possible to control the temperature even in a hollow portion of a mold without causing molding defects. Another object of the present invention is to provide a method for manufacturing a synthetic resin hollow structure that can prevent a delay in resin penetration and shorten a molding cycle.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、この発明に係る合成樹脂製中空構造体の製造方法
は、金型と該金型内に配設した中空の芯材との間に溶融
した合成樹脂を充填して硬化させることにより、前記中
空の芯材を前記硬化した合成樹脂内に一体に設けた合成
樹脂製中空構造体の製造方法であって、金型内に、前記
芯材として温度調節液の内部循環を可能とする中空体を
配置し、前記温度調節液を内部循環させて前記芯材の温
度調節を行った後に、合成樹脂を注入して合成樹脂製中
空構造体の成形を行うことを特徴としている。Means for Solving the Problems To achieve the above object, a method for manufacturing a synthetic resin hollow structure according to the present invention comprises the steps of: providing a mold between a mold and a hollow core material provided in the mold; Melting
Filling and curing the synthetic resin
Empty core material A method of manufacturing a synthetic resin hollow structural body provided integrally with the cured synthetic the resin, into the mold, the hollow body to allow internal circulation of a temperature regulating liquid as the core material Is arranged, the temperature of the core material is adjusted by circulating the temperature adjusting liquid inside, and then a synthetic resin is injected to mold a synthetic resin hollow structure.
【０００９】[0009]
【実施例】以下、この発明に係る合成樹脂製中空構造体
の製造方法の実施例を、図面を参照しつつ説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a synthetic resin hollow structure according to the present invention will be described below with reference to the drawings.
【００１０】図１及び図２に示す金型１０は、上型１１
と下型１２を有しており、上型１１と下型１２との間に
は積層体１３がセットされる。これら上型１１、下型１
２及び積層体１３には、温調パイプ１４（図２参照）を
介して温度調節油（温調油）が取り入れられ或は排出さ
れ、上型１１、下型１２及び積層体１３と温調油供給機
（図示せず）との間で温調油を循環させることができ
る。The mold 10 shown in FIG. 1 and FIG.
And a lower mold 12. A laminate 13 is set between the upper mold 11 and the lower mold 12. These upper mold 11 and lower mold 1
The temperature control oil (temperature control oil) is taken in or discharged from the second mold 2 and the laminate 13 through the temperature control pipe 14 (see FIG. 2), and the upper mold 11, the lower mold 12, and the laminate 13 are temperature-controlled. Temperature-regulated oil can be circulated to and from an oil feeder (not shown).
【００１１】上型１１には、内部全域に配置された循環
路１５が形成されており、循環路１５には連結口１５ａ
を介して温調パイプ１４が連結される。下型１２にも同
様に、循環路１５及び連結口１５ａが形成されている。
また、上型１１には、上面に開口１６ａ，１７ａを有す
ると共に後述するパイプ部２５ａ，２６ａに連通する取
付穴１６，１７（図２参照）、及び側面から突出すると
共に後述するパイプ部２５ｂ，２６ｂを装着するパイプ
状の受け部１８，１９（図２参照）が両側面に設けられ
ている。下型１２には、下面に開口２０ａ，２１ａ（図
２参照）を有すると共に後述するパイプ部２８ａ，２８
ａに連通する取付穴２０，２１が開けられている。これ
ら開口１６ａ，１７ａ、受け部１８，１９及び開口２０
ａ，２１ａには、温調パイプ１４がそれぞれ連結され
る。なお、上型１１の上面に設けられた開口１１ａは、
合成樹脂の注入口である。The upper die 11 is provided with a circulation path 15 which is arranged in the entire inner region. The circulation path 15 has a connection port 15a.
The temperature control pipe 14 is connected via the. Similarly, the lower die 12 is formed with a circulation path 15 and a connection port 15a.
The upper die 11 has openings 16a and 17a on its upper surface and has mounting holes 16 and 17 (see FIG. 2) communicating with pipe portions 25a and 26a, which will be described later. Pipe-shaped receiving portions 18 and 19 (see FIG. 2) for mounting 26b are provided on both side surfaces. The lower mold 12 has openings 20a, 21a (see FIG. 2) on the lower surface, and has pipe portions 28a, 28
Mounting holes 20 and 21 communicating with a are opened. These openings 16a, 17a, receiving portions 18, 19, and opening 20
The temperature control pipes 14 are respectively connected to a and 21a. The opening 11a provided on the upper surface of the upper mold 11 is
Injection port for synthetic resin.
【００１２】積層体１３は、プリフォーム２２，２３と
プリフォーム２４との間にコア（芯材）２５，２６を挟
み込み、更に、プリフォーム２４とプリフォーム２７と
の間にコア（芯材）２８を挟み込んだ状態に積層されて
いる。プリフォーム２２，２３には、温調パイプ１４を
連通させるための穴２２ａ，２３ａがそれぞれ開けられ
ており、プリフォーム２４には、温調パイプ１４を配置
するための受け溝２４ａが両端に形成されている。コア
２５，２６は、例えばブロー成形により中空部Ｓを有す
る中空体に形成されており、コア２５には、一端側に上
方に突出するパイプ部２５ａが、他端側に底面延長上に
突出するパイプ部２５ｂが形成されており、パイプ部２
５ａは取入口として機能し、パイプ部２５ｂは排出口と
して機能する。コア２６にも同様に、取入口として機能
するパイプ部２６ａ及び排出口として機能するパイプ部
２６ｂが形成されている。また、プリフォーム２７に
は、温調パイプ１４を連通させるための穴２７ａが両端
に開けられている。コア２８は、例えばブロー成形によ
り中空部Ｓを有する中空体に形成されており、下方に突
出するパイプ部２８ａが両端に形成されている。各パイ
プ部２８ａは、取入口或は排出口として機能する。The laminate 13 has cores (core materials) 25 and 26 sandwiched between the preforms 22 and 23 and the preform 24, and further has a core (core material) between the preforms 24 and 27. 28 are sandwiched therebetween. Holes 22a and 23a for communicating the temperature control pipe 14 are formed in the preforms 22 and 23, and receiving grooves 24a for disposing the temperature control pipe 14 are formed in both ends of the preform 24. Have been. The cores 25 and 26 are formed in a hollow body having a hollow portion S by, for example, blow molding. The core 25 has a pipe portion 25a projecting upward at one end side and projecting upward from the bottom surface at the other end side. A pipe portion 25b is formed, and the pipe portion 2
5a functions as an inlet, and the pipe part 25b functions as an outlet. Similarly, the core 26 is formed with a pipe 26a functioning as an inlet and a pipe 26b functioning as an outlet. The preform 27 has holes 27a at both ends for communicating the temperature control pipe 14. The core 28 is formed in a hollow body having a hollow portion S by, for example, blow molding, and a pipe portion 28a protruding downward is formed at both ends. Each pipe portion 28a functions as an inlet or an outlet.
【００１３】次に、合成樹脂製中空構造体の製造方法に
ついて説明する。Next, a method for manufacturing a synthetic resin hollow structure will be described.
【００１４】先ず、上型１１の取付穴１６にプリフォー
ム２２の穴２２ａを通してコア２５のパイプ部２５ａを
装着すると共に、上型１１の受け部１８にコア２５のパ
イプ部２５ｂを装着する。同様に、取付穴１７に穴２３
ａを通してパイプ部２６ａを装着すると共に、受け部１
９にパイプ部２６ｂを装着する。ここに、コア２５内及
びコア２６内に温調パイプ１４を介して温調油を循環さ
せるための取入口と排出口が、それぞれセットされる
（図２参照）。First, the pipe portion 25a of the core 25 is mounted on the mounting hole 16 of the upper die 11 through the hole 22a of the preform 22, and the pipe portion 25b of the core 25 is mounted on the receiving portion 18 of the upper die 11. Similarly, hole 23 is attached to mounting hole 17.
a and the receiving portion 1
9 is fitted with a pipe 26b. Here, an inlet and an outlet for circulating the temperature control oil in the core 25 and the core 26 via the temperature control pipe 14 are respectively set (see FIG. 2).
【００１５】また、下型１２の取付穴２０にプリフォー
ム２７の穴２７ａを貫通させてコア２８のパイプ部２８
ａを装着する。同様に、取付穴２１に穴２７ａを貫通さ
せてパイプ部２８ａを装着する。ここに、コア２８内に
温調パイプ１４を介して温調油を循環させるための取入
口と排出口がセットされる（図２参照）。Further, the hole 27a of the preform 27 is passed through the mounting hole 20 of the lower mold 12 so that the pipe portion 28 of the core 28 is formed.
a. Similarly, the pipe portion 28a is mounted by penetrating the mounting hole 21 through the hole 27a. Here, an inlet and an outlet for circulating the temperature control oil through the temperature control pipe 14 are set in the core 28 (see FIG. 2).
【００１６】続いて、金型１０を閉じ、上型１１と下型
１２の各取付穴１６，１７，２０，２１及び受け部１
８，１９と各パイプ部２５ａ，２６ａ，２８ａ，２８ａ
及び２５ｂ，２６ｂとの隙間をシール部材で埋め、コア
２５，２６及びコア２８の取入口及び排出口に温調ホー
ス１４を連結固定する。そして、温調ホース１４を介し
て連結した温調油供給機と各コア２５，２６，２８との
間で温調油を循環させ、各コア２５，２６，２８を温調
する。Subsequently, the mold 10 is closed, and the mounting holes 16, 17, 20, 21 of the upper mold 11 and the lower mold 12 and the receiving portion 1 are formed.
8, 19 and each pipe section 25a, 26a, 28a, 28a
And the gaps between the cores 25b and 26b are filled with a seal member, and the temperature control hose 14 is connected and fixed to the inlets and outlets of the cores 25, 26 and 28. Then, the temperature control oil is circulated between the temperature control oil supply device connected via the temperature control hose 14 and each of the cores 25, 26, 28 to control the temperature of each of the cores 25, 26, 28.
【００１７】この後、溶融した合成樹脂を開口１１ａか
らコア２５，２６，２８と型１１，１２との間に射出注
入して、この注入した合成樹脂を硬化させる成形を行う
ことにより、コア２５，２６，２７を硬化した合成樹脂
内に一体に設ける。これにより、コア２５，２６及びコ
ア２８配置部分が中空部Ｓを形成する閉断面構造の合成
樹脂製中空構造体が形成される。合成樹脂としては、例
えばFRP（繊維強化プラスチック）が用いられる。Thereafter, the molten synthetic resin is removed from the opening 11a.
Injection between the cores 25, 26, 28 and the dies 11, 12
And perform molding to cure this injected synthetic resin
Synthetic resin with cores 25, 26, 27 cured
It is provided integrally inside. As a result, a synthetic resin hollow structure having a closed sectional structure in which the cores 25 , 26 and the core 28 are disposed forms the hollow portion S. As the synthetic resin, for example, FRP (fiber reinforced plastic) is used.
【００１８】このように、上型１１及び下型１２と共に
コア２５，２６及びコア２８にも温調液を流して所望の
温度に保持する温調を行うことができることから、ＦＲ
Ｐの成形体を外表面及びコア側（中空部Ｓ側）の両面か
ら温調することができる。加えて、コア２５，２６及び
コア２８を薄肉のブロー成形体により形成したことによ
り、注入する合成樹脂の注入圧に耐えられるように温調
油を加圧して循環することが容易にできると共に、軽量
化にも寄与する。As described above, since the temperature control liquid can be supplied to the cores 25, 26 and the core 28 together with the upper mold 11 and the lower mold 12 and the temperature can be maintained at a desired temperature, the FR can be controlled.
The temperature of the molded body of P can be controlled from both the outer surface and the core side (hollow portion S side). In addition, since the cores 25, 26, and the core 28 are formed of a thin blow molded body, it is possible to easily pressurize and circulate the temperature control oil so as to withstand the injection pressure of the synthetic resin to be injected, It also contributes to weight reduction.
【００１９】従って、成形サイクルを短くすると共に成
形品の品質を高めることができる。更に、温調油を循環
させるための送出圧力によりコア２５，２６，２８の座
屈を防ぐことができるため、合成樹脂の注入圧を高める
ことができる。Therefore, the molding cycle can be shortened and the quality of the molded article can be improved. Further, since the buckling of the cores 25, 26, 28 can be prevented by the delivery pressure for circulating the temperature control oil, the injection pressure of the synthetic resin can be increased.
【００２０】[0020]
【発明の効果】この発明に係る合成樹脂製中空構造体の
製造方法は、金型と該金型内に配設した中空の芯材との
間に溶融した合成樹脂を充填して硬化させることによ
り、前記中空の芯材を前記硬化した合成樹脂内に一体に
設けた合成樹脂製中空構造体の製造方法であって、金型
内に、前記芯材として温度調節液の内部循環を可能とす
る中空体を配置し、前記温度調節液を内部循環させて前
記芯材の温度調節を行った後に、合成樹脂を注入して合
成樹脂製中空構造体の成形を行うこととしたため、金型
の中空部形成部分であっても温調を可能として、成形不
良が生じるのを未然に防止できる。また、成型時に中空
体内に温度調整液を流すことでコアの座屈を防ぐことが
できるため、合成樹脂の注入圧を高めることができると
共に、樹脂の浸透の遅延を防止できる。これに加えて、
中空体は成形終了後に合成樹脂製中空構造体と一体とな
って成型品の一部を構成するので、成形後は中空体の除
去作業を必要としない。これらの結果、成形サイクルの
短縮及び成形品の製造時間の短縮を可能とする。しか
も、中空体は成形終了後に合成樹脂製中空構造体と一体
となって製品の一部を構成するので、合成樹脂製中空構
造体の軽量化を図ることができる。また、中空体を合成
樹脂製中空構造体内に残すことで、材料の節約を図っ
て、合成樹脂製中空構造体のコストを低減できる。 According to the method of manufacturing a synthetic resin hollow structure according to the present invention, a mold and a hollow core material provided in the mold are combined .
By filling and curing the synthetic resin melted in between
The hollow core material is integrated into the cured synthetic resin.
A method for manufacturing a synthetic resin hollow structure provided , wherein a hollow body that enables internal circulation of a temperature control liquid as the core material is disposed in a mold, and the temperature control liquid is internally circulated, and after the temperature adjustment of the core material, because it was decided to perform the molding of the synthetic resin hollow structural member by injecting synthetic resin, as a possible temperature control even hollow section forming part of the mold, the molding defects This can be prevented from occurring. Also, hollow during molding
Prevents core buckling by flowing a temperature control solution into the body
Because it is possible to increase the injection pressure of the synthetic resin
In both cases, delay of resin penetration can be prevented. In addition to this,
The hollow body is integrated with the synthetic resin hollow structure after molding.
After molding, the hollow body is removed.
No need to leave. As a result, the molding cycle
It is possible to shorten the manufacturing time of the molded product. Only
The hollow body is integrated with the synthetic resin hollow structure after molding.
And constitute a part of the product.
The structure can be reduced in weight. Synthesizing hollow body
Save material by leaving it inside the resin hollow structure.
Thus, the cost of the synthetic resin hollow structure can be reduced.
【図１】この発明に係る合成樹脂製中空構造体の製造方
法に使用する金型の分解構成説明図である。FIG. 1 is an exploded configuration view of a mold used in a method of manufacturing a synthetic resin hollow structure according to the present invention.
【図２】図１に示す金型の閉じた状態の概略説明図であ
る。FIG. 2 is a schematic explanatory view of the mold shown in FIG. 1 in a closed state.
【図３】従来の合成樹脂製中空構造体の製造方法に使用
する金型の分解構成説明図である。FIG. 3 is an exploded configuration view of a mold used in a conventional method of manufacturing a synthetic resin hollow structure.
１０…金型 ２５，２６，２８…コア Ｓ…中空部 10: Mold 25, 26, 28 ... Core S: Hollow part
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 22:00 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI B29L 22:00
Claims (1)
の間に溶融した合成樹脂を充填して硬化させることによ
り、前記中空の芯材を前記硬化した合成樹脂内に一体に
設けた合成樹脂製中空構造体の製造方法であって、 金型内に、前記芯材として温度調節液の内部循環を可能
とする中空体を配置し、前記温度調節液を内部循環させ
て前記芯材の温度調節を行った後に、合成樹脂を注入し
て合成樹脂製中空構造体の成形を行うことを特徴とする
合成樹脂製中空構造体の製造方法。1. A mold and a hollow core material disposed in the mold.
By filling and curing the synthetic resin melted during
The hollow core material is integrated into the cured synthetic resin.
A method for manufacturing a synthetic resin hollow structure provided , wherein a hollow body that enables internal circulation of a temperature control liquid as the core material is disposed in a mold, and the temperature control liquid is internally circulated, and A method for producing a synthetic resin hollow structure, comprising: injecting a synthetic resin into a synthetic resin hollow structure after performing temperature control of a core material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3012096A JP2745830B2 (en) | 1991-02-01 | 1991-02-01 | Method for manufacturing synthetic resin hollow structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3012096A JP2745830B2 (en) | 1991-02-01 | 1991-02-01 | Method for manufacturing synthetic resin hollow structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04246521A JPH04246521A (en) | 1992-09-02 |
| JP2745830B2 true JP2745830B2 (en) | 1998-04-28 |
Family
ID=11796047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3012096A Expired - Lifetime JP2745830B2 (en) | 1991-02-01 | 1991-02-01 | Method for manufacturing synthetic resin hollow structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2745830B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5686711A (en) * | 1979-12-19 | 1981-07-14 | Hitachi Ltd | Metallic mold for molding |
| JPS5889309U (en) * | 1981-12-11 | 1983-06-17 | 積水化学工業株式会社 | Core part of mold for pipe fitting with bent pipe part |
| JPH0696250B2 (en) * | 1986-05-09 | 1994-11-30 | 株式会社ブリヂストン | Injection molding equipment |
| JPH04189522A (en) * | 1990-11-26 | 1992-07-08 | Mazda Motor Corp | Manufacture of resin molded product |
-
1991
- 1991-02-01 JP JP3012096A patent/JP2745830B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04246521A (en) | 1992-09-02 |
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