JPH0631764A - Molding device of hollow molded body - Google Patents
Molding device of hollow molded bodyInfo
- Publication number
- JPH0631764A JPH0631764A JP4194294A JP19429492A JPH0631764A JP H0631764 A JPH0631764 A JP H0631764A JP 4194294 A JP4194294 A JP 4194294A JP 19429492 A JP19429492 A JP 19429492A JP H0631764 A JPH0631764 A JP H0631764A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- resin
- pressure
- mold
- temperature
- 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
- 238000000465 moulding Methods 0.000 title claims description 28
- 239000011347 resin Substances 0.000 claims abstract description 55
- 229920005989 resin Polymers 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 27
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1732—Control circuits therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融樹脂を金型内のキ
ャビテイに射出した後、ガスを注入して中空部を有する
成形体を成形するための成形装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for injecting a molten resin into a cavity in a mold and then injecting a gas to mold a molded article having a hollow portion.
【０００２】[0002]
【従来の技術】従来より、中空部を有する樹脂製成形体
を射出成形により成形するための成形装置が知られてい
る。この種の成形装置では、金型のキャビテイ内に溶融
樹脂が射出充填された後、比較的圧力の大きなガス（窒
素ガス等）が吹き込まれることにより樹脂内部にガスが
充填されて中空部が形成され、この樹脂が凝固されるこ
とによって中空成形体が成形されている（特公昭４８−
４１２６４号公報等参照）。2. Description of the Related Art Conventionally, a molding apparatus for molding a resin molding having a hollow portion by injection molding has been known. In this type of molding machine, after the molten resin is injected and filled into the cavity of the mold, a gas with a relatively large pressure (such as nitrogen gas) is blown into the resin to fill the gas inside the resin and form a hollow portion. Then, the hollow molded body is molded by solidifying the resin (Japanese Patent Publication No. 48-
No. 41264, etc.).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
従来技術では、キャビテイに溶融樹脂が射出充填された
後、前記樹脂の表面が所望の状態に固化した時点でガス
を注入することが極めて困難となるという問題がある。
すなわち、金型自体の温度や充填される溶融樹脂の温度
等の種々の要因によりキャビテイ内で樹脂が凝固する時
間が異なってしまい、これを正確に検知することができ
ないからである。従って、キャビテイ内の樹脂の外層が
十分に固化しない状態、あるいは樹脂の凝固が進行した
後にガスが注入される場合が多く、所望の中空成形体を
効率的に得ることができないという不具合が指摘されて
いる。However, in the above-mentioned prior art, it is extremely difficult to inject gas when the surface of the resin is solidified in a desired state after the cavity is filled with the molten resin by injection. There is a problem of becoming.
That is, the time for the resin to solidify in the cavity varies due to various factors such as the temperature of the mold itself and the temperature of the molten resin to be filled, and this cannot be accurately detected. Therefore, it is often pointed out that the outer layer of the resin in the cavity is not sufficiently solidified, or gas is often injected after the resin has been solidified, and the desired hollow molded article cannot be efficiently obtained. ing.
【０００４】本発明はこの種の問題を解決するものであ
り、キャビテイに充填された溶融樹脂の固化状態等を確
実に検出することができ、これにより品質に優れた中空
成形体を効率的かつ容易に成形することが可能な中空成
形体の成形装置を提供することを目的とする。The present invention solves this kind of problem, and can reliably detect the solidified state of the molten resin filled in the cavities, thereby efficiently and efficiently producing a hollow molded article of excellent quality. An object of the present invention is to provide a molding device for a hollow molded body that can be easily molded.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明は、金型内に形成されたキャビテイに溶融
樹脂が射出された後、未凝固の樹脂内部にガスを注入し
て中空部を形成するためのガス注入手段と、前記キャビ
テイに射出充填された樹脂の温度および圧力を検出する
ための検出手段と、を備えることを特徴とする。In order to achieve the above-mentioned object, according to the present invention, after a molten resin is injected into a cavity formed in a mold, gas is injected into the unsolidified resin. A gas injection unit for forming a hollow portion and a detection unit for detecting the temperature and pressure of the resin injected and filled in the cavity are provided.
【０００６】[0006]
【作用】本発明に係る中空成形体の成形装置では、金型
内に形成されたキャビテイに溶融樹脂が射出充填される
と、この樹脂の温度および圧力が検出手段を介して検出
されるため、前記樹脂の温度および圧力状態からキャビ
テイ内における樹脂の固化状態や中空部の形成状態等が
正確に検出される。従って、この情報に基づいてガスの
注入タイミング等を設定することにより、高品質な中空
成形体を確実かつ容易に成形することができる。In the hollow molded body molding apparatus according to the present invention, when the cavity formed in the mold is injected and filled with the molten resin, the temperature and pressure of the resin are detected through the detection means. From the temperature and pressure of the resin, the solidified state of the resin in the cavity, the state of formation of the hollow portion, etc. can be accurately detected. Therefore, by setting the gas injection timing and the like based on this information, a high quality hollow molded article can be molded reliably and easily.
【０００７】[0007]
【実施例】本発明に係る中空成形体の成形装置について
実施例を挙げ、添付の図面を参照しながら以下詳細に説
明する。EXAMPLES Examples of the molding apparatus for hollow molded articles according to the present invention will be described in detail below with reference to the accompanying drawings.
【０００８】図１および図２において、参照符号１０
は、本発明の第１の実施例に係る成形装置を示す。この
成形装置１０は、金型１２を備え、この金型１２を構成
する下型１４と上型１６との間にキャビテイ１８が形成
される。このキャビテイ１８の一端側に堰２０および湯
道２２を介してインジェクションノズル２４が連通す
る。1 and 2, reference numeral 10
Shows a molding apparatus according to a first embodiment of the present invention. The molding apparatus 10 includes a mold 12, and a cavity 18 is formed between a lower mold 14 and an upper mold 16 which compose the mold 12. An injection nozzle 24 communicates with one end of the cavity 18 via a weir 20 and a runner 22.
【０００９】下型１４には、キャビテイ１８の堰２０
側、すなわち、溶融樹脂射出側前部に対応してガス注入
手段２６が設けられるとともに、このキャビテイ１８の
前記溶融樹脂射出側前部とは反対側の後部に検出手段２
８が設けられる。ガス注入手段２６は、下型１４に嵌着
される油圧シリンダ３０を備え、この油圧シリンダ３０
内に形成されるシリンダ室３２に油圧ライン３４、３５
が連通する。この油圧ライン３４、３５は油圧制御部３
６に接続され、この油圧制御部３６の駆動作用下にシリ
ンダ室３２内に配設されているピストン３８が上下方向
に摺動変位する。The lower mold 14 is provided with a weir 20 of a cavity 18.
Side, that is, the gas injection means 26 is provided corresponding to the front portion of the molten resin injection side, and the detection means 2 is provided at the rear portion of the cavity 18 opposite to the front portion of the molten resin injection side.
8 are provided. The gas injection means 26 includes a hydraulic cylinder 30 fitted to the lower mold 14, and the hydraulic cylinder 30
The hydraulic lines 34, 35 are formed in the cylinder chamber 32 formed inside.
Communicate with each other. The hydraulic lines 34 and 35 are connected to the hydraulic control unit 3
6, the piston 38 disposed in the cylinder chamber 32 is slidably displaced in the vertical direction under the driving action of the hydraulic control unit 36.
【００１０】このピストン３８から上方に延びるロッド
４０の先端部に、ピン部４２が同軸的かつ一体的に設け
られている。ピン部４２は、下型１４に形成されている
孔部４４に嵌合するとともに、その先端部をキャビテイ
１８内に臨入可能にその長さが選択されている。油圧シ
リンダ３０には、ピン部４２を囲繞するように室４６が
形成され、この室４６にガス通路４８の一端が連通す
る。このガス通路４８の他端側は下型１４から外部に延
び、図示しない高圧ガス供給源に連通している。A pin portion 42 is coaxially and integrally provided at the tip of a rod 40 extending upward from the piston 38. The length of the pin portion 42 is selected so as to fit into the hole portion 44 formed in the lower mold 14 and the tip end portion thereof can be inserted into the cavity 18. A chamber 46 is formed in the hydraulic cylinder 30 so as to surround the pin portion 42, and one end of a gas passage 48 communicates with the chamber 46. The other end of the gas passage 48 extends from the lower mold 14 to the outside and communicates with a high pressure gas supply source (not shown).
【００１１】検出手段２８は、下型１４に固着されるケ
ーシング５０を備え、このケーシング５０は熱伝導率の
低い、例えば、ＳＵＳ材やセラミックス等で形成されて
いる。ケーシング５０の端部には、キャビテイ１８の後
部側に突出する筒状部５２が設けられており、この筒状
部５２内およびケーシング５０の開口部５４内に測定ピ
ン５６が嵌合配設されている。この測定ピン５６は熱伝
導率の高い、例えば、銅材等で形成されており、その先
端部が所定の長さだけキャビテイ１８内に臨入する。The detecting means 28 is provided with a casing 50 fixed to the lower mold 14, and the casing 50 is made of a material having a low thermal conductivity, such as SUS material or ceramics. At the end of the casing 50, a tubular portion 52 protruding toward the rear side of the cavity 18 is provided, and a measuring pin 56 is fitted and arranged in the tubular portion 52 and the opening 54 of the casing 50. ing. The measuring pin 56 is formed of, for example, a copper material having a high thermal conductivity, and its tip portion is inserted into the cavity 18 by a predetermined length.
【００１２】測定ピン５６の途上には、温度検出手段、
例えば、熱電対５８が取着されるとともに、この測定ピ
ン５６の大径な下端部側には、圧力検出手段、例えば、
圧力センサ６０が配設され、この圧力センサ６０および
測定ピン５６がプラグ部材６２を介してケーシング５０
に固定されている。熱電対５８および圧力センサ６０
は、検知部６４に電気的に接続されている。On the way of the measuring pin 56, a temperature detecting means,
For example, a thermocouple 58 is attached, and a pressure detecting means, for example,
A pressure sensor 60 is provided, and the pressure sensor 60 and the measuring pin 56 are connected to the casing 50 via a plug member 62.
It is fixed to. Thermocouple 58 and pressure sensor 60
Are electrically connected to the detection unit 64.
【００１３】次に、このように構成される成形装置１０
の動作について、図３に示すフローチャートを参照して
説明する。Next, the molding apparatus 10 thus constructed
The operation will be described with reference to the flowchart shown in FIG.
【００１４】先ず、金型１２を構成する下型１４と上型
１６とが型締めされ（ステップＳ１）、ガス注入手段２
６を構成するピン部４２により孔部４４が閉塞された状
態で（図１参照）、インジェクションノズル２４から湯
道２２および堰２０を介してキャビテイ１８に溶融樹脂
が射出充填される（ステップＳ２）。その際、図示しな
い高圧ガス供給源からガス通路４８を介して室４６内に
高圧ガスが導入されている。First, the lower mold 14 and the upper mold 16 constituting the mold 12 are clamped (step S1), and the gas injection means 2
In the state where the hole portion 44 is closed by the pin portion 42 which constitutes 6 (see FIG. 1), the cavity 18 is injected and filled with the molten resin from the injection nozzle 24 through the runner 22 and the weir 20 (step S2). . At that time, high-pressure gas is introduced into the chamber 46 from a high-pressure gas supply source (not shown) through the gas passage 48.
【００１５】次いで、ステップＳ３において、キャビテ
イ１８内に充填されている溶融樹脂の表面が所望の固化
状態になったか否かが判断される。すなわち、キャビテ
イ１８内に溶融樹脂が充填されると、この樹脂の温度が
検出手段２８を構成する測定ピン５６から熱電対５８を
介して検出されるとともに、該樹脂の圧力がこの測定ピ
ン５６から圧力センサ６０を介して検出される。その
際、検出手段２８により検出される溶融樹脂の温度およ
び圧力は、図４に示すように、経時的に低下するもので
あり、そのデータのピークとなる充填終了時（ｔ0 ）か
ら所定時間経過した時点（時間ｔ1 ）で樹脂の温度およ
び圧力が所望の値となる。従って、その時間ｔ1 を計時
することにより、キャビテイ１８内の樹脂表面が所望の
固化状態に至ったことが検出される。Next, in step S3, it is judged whether or not the surface of the molten resin filled in the cavity 18 is in a desired solidified state. That is, when the cavity 18 is filled with the molten resin, the temperature of the resin is detected from the measuring pin 56 constituting the detecting means 28 via the thermocouple 58, and the pressure of the resin is measured from the measuring pin 56. It is detected via the pressure sensor 60. At that time, the temperature and pressure of the molten resin detected by the detection means 28 decrease with time, as shown in FIG. 4, and a predetermined time has elapsed from the end of filling (t 0 ) which is the peak of the data. When the time has elapsed (time t 1 ), the temperature and pressure of the resin have desired values. Therefore, by measuring the time t 1 , it is detected that the resin surface in the cavity 18 has reached a desired solidified state.
【００１６】そこで、油圧制御部３６の駆動作用下に油
圧シリンダ３０の油圧ライン３４に圧油が供給され、シ
リンダ室３２内のピストン３８が上昇してピン部４２の
先端部がキャビテイ１８内に所定量だけ突出し、このキ
ャビテイ１８内で凝固する前の樹脂表面に小孔が形成さ
れる。その後、油圧ライン３５に圧油が供給されること
によってピストン３８を介してピン部４２が下降し、孔
部４４が室４６に連通する。このため、高圧ガスが孔部
４４からキャビテイ１８内の樹脂内部に導入され、中空
部７０が形成される（ステップＳ４および図２参照）。Then, under the driving action of the hydraulic control section 36, pressure oil is supplied to the hydraulic line 34 of the hydraulic cylinder 30, the piston 38 in the cylinder chamber 32 rises, and the tip of the pin section 42 enters the cavity 18. A small hole is formed on the surface of the resin before protruding by a predetermined amount and solidifying in the cavity 18. Then, by supplying pressure oil to the hydraulic line 35, the pin portion 42 descends via the piston 38, and the hole portion 44 communicates with the chamber 46. Therefore, the high pressure gas is introduced into the resin inside the cavity 18 through the hole 44, and the hollow portion 70 is formed (see step S4 and FIG. 2).
【００１７】ステップＳ５において、キャビテイ１８内
に所望の中空部７０が形成されたか否かが判断される。
すなわち、測定ピン５６がキャビテイ１８内の樹脂に接
している際には、熱電対５８を介して検出される温度は
徐々に低下していくが、この測定ピン５６を囲繞して中
空部７０が形成されると、該測定ピン５６がガスに覆わ
れるために熱電対５８を介して検出される温度が急激に
下降し始める（図５Ａ中、時間ｔ2 参照）。一方、圧力
センサ６０を介して検出される圧力は樹脂の表面固化に
伴って徐々に下降しており、測定ピン５６が中空部７０
に囲繞されることによってこの測定ピン５６には高圧ガ
スの圧力が作用し、検出される圧力が一旦上昇する（図
５Ｂ参照）。In step S5, it is determined whether or not the desired hollow portion 70 is formed in the cavity 18.
That is, when the measuring pin 56 is in contact with the resin inside the cavity 18, the temperature detected via the thermocouple 58 gradually decreases, but the hollow portion 70 is surrounded by the measuring pin 56. When formed, the temperature detected via the thermocouple 58 begins to drop sharply because the measuring pin 56 is covered with gas (see time t 2 in FIG. 5A). On the other hand, the pressure detected by the pressure sensor 60 is gradually lowered as the surface of the resin is solidified, and the measuring pin 56 has a hollow portion 70.
The pressure of the high-pressure gas acts on the measuring pin 56 by being surrounded by, and the detected pressure temporarily rises (see FIG. 5B).
【００１８】従って、図５Ａおよび図５Ｂに示すような
温度の急激な下降および圧力の上昇が惹起される前にお
いては、高圧ガスの注入量を追加し（ステップＳ６）、
該温度および圧力が所望の状態となってステップＳ５で
ＹＥＳと判定されると、ステップＳ７に移り、中空成形
体が取り出し可能な温度まで冷却されたか否かが判断さ
れる。この樹脂の冷却状態は、検出手段２８を構成する
熱電対５８により検出される温度に基づいて判断される
ものであり、図６に示すように、検出温度が樹脂固化温
度であるＴ℃となった時点において金型１２の型開きが
行われる（ステップＳ８）。そして、この金型１２から
中空成形体が取り出され（ステップＳ９）、この中空成
形体から不要な部分が除去されて製品が得られる。Therefore, before the rapid decrease in temperature and increase in pressure as shown in FIGS. 5A and 5B, the injection amount of high-pressure gas is added (step S6).
When the temperature and the pressure are in the desired states and it is determined to be YES in step S5, the process proceeds to step S7 and it is determined whether or not the hollow molded body has been cooled to a temperature at which it can be taken out. The cooling state of the resin is determined based on the temperature detected by the thermocouple 58 constituting the detecting means 28, and as shown in FIG. 6, the detected temperature is T ° C. which is the resin solidifying temperature. At that time, the mold 12 is opened (step S8). Then, the hollow molded body is taken out of the mold 12 (step S9), and unnecessary parts are removed from the hollow molded body to obtain a product.
【００１９】このように、本実施例では、キャビテイ１
８内に充填された樹脂の温度変化並びに圧力変化を検出
手段２８を構成する熱電対５８および圧力センサ６０を
介して連続的に検出している。従って、検知部６４にお
いて、この温度データ並びに圧力データを介してキャビ
テイ１８内における樹脂の種々の状態、すなわち、樹脂
表面の固化状態、中空部７０の形成状態および中空成形
体の冷却状態等をリアルタイムで正確に検出することが
できる。これにより、金型１２自体の温度や射出される
溶融樹脂の温度の変化等に影響されることがなく、樹脂
内部への高圧ガスの注入開始時期やこの高圧ガスの注入
停止時期および金型１２の型開き時期等を高精度に制御
することができ、高品質な中空成形体を効率的かつ容易
に成形し得るという効果が得られる。As described above, in this embodiment, the cavity 1
The temperature change and the pressure change of the resin filled in 8 are continuously detected through the thermocouple 58 and the pressure sensor 60 which constitute the detecting means 28. Therefore, in the detection unit 64, various states of the resin in the cavity 18, that is, the solidified state of the resin surface, the formation state of the hollow portion 70, the cooling state of the hollow molded body, and the like are real-time based on the temperature data and the pressure data. Can be accurately detected. As a result, there is no influence of the temperature of the mold 12 itself, the temperature of the molten resin to be injected, and the like, and the injection start time of the high pressure gas into the resin, the injection stop time of this high pressure gas, and the mold 12 are not affected. It is possible to control the mold opening timing and the like with high accuracy, and it is possible to obtain an effect that a high quality hollow molded article can be efficiently and easily molded.
【００２０】次に、本発明の第２の実施例に係る成形装
置１０ａを、図７および図８を参照して以下に説明す
る。なお、第１の実施例に係る成形装置１０と同一の構
成要素には同一の参照数字に符号ａを付して、その詳細
な説明は省略する。Next, a molding apparatus 10a according to a second embodiment of the present invention will be described below with reference to FIGS. 7 and 8. The same components as those of the molding apparatus 10 according to the first embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted.
【００２１】この第２の実施例に係る成形装置１０ａで
は、下型１４ａと上型１６ａとの間に、キャビテイ１８
ａに連通する幅狭な通路１００を介してオーバーフロー
部１０２が設けられている。このオーバーフロー部１０
２には、検出手段２８ａが配設されるとともに、この検
出手段２８ａを構成する測定ピン５６ａがオーバーフロ
ー部１０２内の中空部７０ａに対応する位置に突出して
配置されている（図８参照）。In the molding apparatus 10a according to the second embodiment, the cavity 18 is provided between the lower mold 14a and the upper mold 16a.
An overflow portion 102 is provided via a narrow passage 100 communicating with a. This overflow section 10
2, the detecting means 28a is arranged, and the measuring pin 56a constituting the detecting means 28a is arranged so as to project to a position corresponding to the hollow portion 70a in the overflow portion 102 (see FIG. 8).
【００２２】従って、この成形装置１０ａでは、前述し
た成形装置１０と同様に、検出手段２８ａによりオーバ
ーフロー部１０２に充填された樹脂の温度変化並びに圧
力変化を検出して高圧ガスの注入タイミングや中空部７
０ａの形成状態および樹脂の固化状態等を正確に検出す
ることができ、品質に優れた中空成形体を得ることがで
きるという効果が得られる。Therefore, in this molding apparatus 10a, similar to the molding apparatus 10 described above, the temperature change and the pressure change of the resin filled in the overflow section 102 are detected by the detecting means 28a to detect the injection timing of the high pressure gas and the hollow section. 7
It is possible to accurately detect the formation state of 0a, the solidification state of the resin, and the like, and it is possible to obtain the effect that a hollow molded body having excellent quality can be obtained.
【００２３】[0023]
【発明の効果】本発明に係る中空成形体の成形装置によ
れば、以下の効果乃至利点が得られる。EFFECTS OF THE INVENTION According to the molding apparatus for hollow molded articles of the present invention, the following effects and advantages are obtained.
【００２４】キャビテイに射出充填された樹脂の温度お
よび圧力が検出手段により検出されることによって、こ
の温度データおよび圧力データを介してガスの注入タイ
ミング等を正確に検出することができる。これにより、
品質に優れた中空成形体を効率的かつ容易に成形するこ
とが可能になる。By detecting the temperature and pressure of the resin injected and filled into the cavity by the detecting means, it is possible to accurately detect the gas injection timing and the like through the temperature data and the pressure data. This allows
It becomes possible to efficiently and easily mold a hollow molded article having excellent quality.
【図１】本発明の第１の実施例に係る成形装置の概略縦
断説明図である。FIG. 1 is a schematic vertical cross-sectional explanatory view of a molding apparatus according to a first embodiment of the present invention.
【図２】前記成形装置における中空成形体の成形途上の
動作説明図である。FIG. 2 is an explanatory view of an operation in the middle of molding a hollow molded body in the molding apparatus.
【図３】前記成形装置により中空成形体を成形する際の
フローチャートである。FIG. 3 is a flow chart when a hollow molded body is molded by the molding device.
【図４】樹脂の温度および圧力変化を示す図である。FIG. 4 is a diagram showing changes in temperature and pressure of resin.
【図５】高圧ガス注入による樹脂温度および圧力の変化
を示す図である。FIG. 5 is a diagram showing changes in resin temperature and pressure due to high-pressure gas injection.
【図６】樹脂温度の変化を示す図である。FIG. 6 is a diagram showing a change in resin temperature.
【図７】本発明の第２の実施例に係る成形装置の概略縦
断説明図である。FIG. 7 is a schematic vertical cross-sectional explanatory view of a molding apparatus according to a second embodiment of the present invention.
【図８】前記成形装置の動作説明図である。FIG. 8 is an operation explanatory view of the molding apparatus.
１０、１０ａ…成形装置 １２、１２ａ…金型 １４、１４ａ…下型 １６、１６ａ…上型 １８、１８ａ…キャビテイ ２６、２６ａ…ガス注入手段 ２８、２８ａ…検出手段 ３０、３０ａ…油圧シリンダ ４２、４２ａ…ピン ４４、４４ａ…孔部 ５０、５０ａ…ケーシング ５６、５６ａ…測定ピン ５８、５８ａ…熱電対 ６０、６０ａ…圧力センサ ６４、６４ａ…検知部 １０２…オーバーフロー部 10, 10a ... Molding device 12, 12a ... Mold 14, 14a ... Lower mold 16, 16a ... Upper mold 18, 18a ... Cavity 26, 26a ... Gas injection means 28, 28a ... Detecting means 30, 30a ... Hydraulic cylinder 42, 42a ... pins 44,44a ... holes 50,50a ... casing 56,56a ... measuring pins 58,58a ... thermocouples 60,60a ... pressure sensors 64,64a ... detection section 102 ... overflow section
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｌ 22:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display area // B29L 22:00 4F
Claims (3)
が射出された後、未凝固の樹脂内部にガスを注入して中
空部を形成するためのガス注入手段と、 前記キャビテイに射出充填された樹脂の温度および圧力
を検出するための検出手段と、 を備えることを特徴とする中空成形体の成形装置。1. A gas injection means for injecting a gas into a non-solidified resin to form a hollow portion after a molten resin is injected into a cavity formed in a mold, and the cavity is injection-filled. A molding device for a hollow molded body, comprising: a detection means for detecting the temperature and pressure of the resin thus molded.
出手段は、前記キャビテイの溶融樹脂射出側前部とは反
対側の後部に設けられることを特徴とする中空成形体の
成形装置。2. The molding apparatus according to claim 1, wherein the detecting means is provided at a rear portion of the cavity opposite to a front portion on the molten resin injection side.
出手段は、ガス注入により中空部となる部分に対応して
配設されることを特徴とする中空成形体の成形装置。3. The molding apparatus according to claim 2, wherein the detecting means is arranged corresponding to a portion which becomes a hollow portion by gas injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19429492A JP3221732B2 (en) | 1992-07-21 | 1992-07-21 | Hollow molded body molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19429492A JP3221732B2 (en) | 1992-07-21 | 1992-07-21 | Hollow molded body molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0631764A true JPH0631764A (en) | 1994-02-08 |
| JP3221732B2 JP3221732B2 (en) | 2001-10-22 |
Family
ID=16322205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19429492A Expired - Fee Related JP3221732B2 (en) | 1992-07-21 | 1992-07-21 | Hollow molded body molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3221732B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040032432A (en) * | 2002-10-09 | 2004-04-17 | 주식회사 대우일렉트로닉스 | A gas injection molding apparatus and the controlling method |
| US7104681B2 (en) * | 2003-02-10 | 2006-09-12 | ICIPC—Instituto De Capacitacion E Investigacion Del Plastico Y Del Caucho | Method and device to determine the thermal diffusivity of materials, such as thermoplastic polymers, during non-stationary heat transfer processes |
| US7621343B2 (en) | 1998-12-21 | 2009-11-24 | Halliburton Energy Services, Inc. | Steerable drilling system and method |
| EP3950262A1 (en) * | 2020-08-04 | 2022-02-09 | Chung Yuan Christian University | Injection molding apparatus and injection molding method |
| WO2024013371A1 (en) | 2022-07-15 | 2024-01-18 | Priamus System Technologies, Zweigniederlassung der Barnes Group Suisse Industries GmbH | Sensor unit for monitoring a cavity in an injection mold |
-
1992
- 1992-07-21 JP JP19429492A patent/JP3221732B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7621343B2 (en) | 1998-12-21 | 2009-11-24 | Halliburton Energy Services, Inc. | Steerable drilling system and method |
| KR20040032432A (en) * | 2002-10-09 | 2004-04-17 | 주식회사 대우일렉트로닉스 | A gas injection molding apparatus and the controlling method |
| US7104681B2 (en) * | 2003-02-10 | 2006-09-12 | ICIPC—Instituto De Capacitacion E Investigacion Del Plastico Y Del Caucho | Method and device to determine the thermal diffusivity of materials, such as thermoplastic polymers, during non-stationary heat transfer processes |
| EP3950262A1 (en) * | 2020-08-04 | 2022-02-09 | Chung Yuan Christian University | Injection molding apparatus and injection molding method |
| CN114055741A (en) * | 2020-08-04 | 2022-02-18 | 中原大学 | Injection molding apparatus and injection molding method |
| US11654603B2 (en) | 2020-08-04 | 2023-05-23 | Chung Yuan Christian University | Injection molding apparatus and injection molding method |
| WO2024013371A1 (en) | 2022-07-15 | 2024-01-18 | Priamus System Technologies, Zweigniederlassung der Barnes Group Suisse Industries GmbH | Sensor unit for monitoring a cavity in an injection mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3221732B2 (en) | 2001-10-22 |
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