JPS61206612A - Injection hot-runner mold and injection molding - Google Patents
Injection hot-runner mold and injection moldingInfo
- Publication number
- JPS61206612A JPS61206612A JP4780185A JP4780185A JPS61206612A JP S61206612 A JPS61206612 A JP S61206612A JP 4780185 A JP4780185 A JP 4780185A JP 4780185 A JP4780185 A JP 4780185A JP S61206612 A JPS61206612 A JP S61206612A
- Authority
- JP
- Japan
- Prior art keywords
- hot runner
- hot
- exit gate
- gate
- inner stem
- 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
- 238000001746 injection moulding Methods 0.000 title claims description 10
- 238000002347 injection Methods 0.000 title description 3
- 239000007924 injection Substances 0.000 title description 3
- 229920005989 resin Polymers 0.000 claims abstract description 65
- 239000011347 resin Substances 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 239000012212 insulator Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1603—Multi-way nozzles specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は射出成形用ボットンンナ金型に関し、特に性
質の異なった２種類の熱可塑性樹脂材料をもとに、多層
体からなる成形品を得るための金型に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bottomner mold for injection molding, and more particularly to a mold for obtaining a molded product consisting of a multilayer body based on two types of thermoplastic resin materials with different properties. be.
従来、この種の多層体からなる成形品を得る場合、それ
ぞれの屠体をフィルム成形法によって成形し、その後そ
れらの屠体を重ね合わせて、再加熱しながら圧縮空気成
形法により所要形状に最終成形するという手法がとられ
ている。しかしながら、前記のような方法では、少くと
も２工程にわたる成形を必要とするため、各成形を行う
ための装置を設置し々ければならず、製品コストが高価
になるだけでなく、複雑な形状の製品を成形できないと
いう欠点があった。Conventionally, when obtaining a molded product consisting of this type of multilayer body, each carcass was molded using a film molding method, then the carcasses were stacked on top of each other, and the final shape was formed into the desired shape using a compressed air molding method while being reheated. A method of molding is used. However, the method described above requires molding in at least two steps, which necessitates the installation of equipment for each molding process, which not only increases product costs but also creates complex shapes. The disadvantage was that it was not possible to mold products.
また射出成形法により前記のような成形品を得ることも
考えられるが、キャビティに樹脂材料を注入するための
出口ゲートを、２種類の樹脂材料に応じてそれぞれ独立
して設けなければならず、金型の内部構造が複雑となっ
て大きなものとなるに加えて、異なった２つの出口ゲー
トから注入されるため、均一な層状の成形品を得ること
ができないという欠点があった。It is also possible to obtain the above-mentioned molded product by injection molding, but it would be necessary to separately provide exit gates for injecting resin materials into the cavities, depending on the two types of resin materials. In addition to the fact that the internal structure of the mold becomes complicated and large, there is also the disadvantage that it is impossible to obtain a molded product with uniform layers because the mold is injected from two different exit gates.
この発明は上記のような従来の欠点を排除し、射出成形
法により多層体からなる成形品を成形するにつき、内部
構造が簡単であって全体形状が小きくで済み、しかも各
屠体を均一とすることができる金型を提供することを目
的とする。This invention eliminates the above-mentioned conventional drawbacks and molds a multi-layer molded product by injection molding, which simplifies the internal structure and requires a small overall shape, while also making it possible to form each carcass uniformly. The purpose is to provide a mold that can
以下回向に示す実施例に基づいてこの発明を説明する。The present invention will be explained below based on the embodiments shown in the following.
第１図に示すように１は固定型であって、その内部には
ノズルハウジング２、マニホルド３およびノ々ルブプッ
シュ４を具えたホットランナブロック５が組込まれてい
る。ホットランナブロック５にはマニホルド３からノズ
ルハウジング２に亘って出口ゲート６を有する第１ホツ
トランナ７が形成されている。As shown in FIG. 1, 1 is of a fixed type, and a hot runner block 5 having a nozzle housing 2, a manifold 3, and a nozzle pusher 4 is assembled therein. A first hot runner 7 having an outlet gate 6 is formed in the hot runner block 5 from the manifold 3 to the nozzle housing 2.
第１ホツトランナ７内には、先端部が出口ゲート６から
離間したアウタステム８が収容され、このアウタステム
８には先端部に出口ゲート６と整合する出口ゲート９を
有する第２ホツトランナ１０が形成されていて、この第
２ホツトランナｌＯは第１ホツトランナ７と同心的とな
っている。１１．１２は第１、第２ホツトランナ７．１
０にそれぞれ第１、第２樹脂材料Ａ、Ｂ全供給する第１
、第２樹脂通路であって、第２樹脂通路１２には逆止弁
１３が設けられいる。The first hot runner 7 houses an outer stem 8 whose tip is spaced apart from the outlet gate 6, and the outer stem 8 is formed with a second hot runner 10 having an outlet gate 9 aligned with the outlet gate 6 at its tip. Thus, the second hot runner lO is concentric with the first hot runner 7. 11.12 is the first and second hot runner 7.1
0, the first and second resin materials A and B are respectively supplied.
, the second resin passage 12 is provided with a check valve 13.
この逆止弁１３は図示しない射出機本体のノズルに設け
てもよい。This check valve 13 may be provided in a nozzle of the injection machine main body (not shown).
アウタステム８の後端部はマニホルド３およびパルプブ
ツシュ４を貫通してその空所１４に突出し、ノ々ルブプ
ッシュ４に固定されている。The rear end of the outer stem 8 passes through the manifold 3 and the pulp bush 4, projects into the cavity 14 thereof, and is fixed to the knob push 4.
第２ホツトランナ１０内にはインナステム１７が第２ホ
ットランナ１ｏＶＣ沿って往復移動可能に収容され、こ
のインナステム１７の後端部はアウタステム８を貫通し
て空所１４に突出し、この空所１４に摺動可能に収容さ
れたピストン１６に固定されている。An inner stem 17 is housed in the second hot runner 10 so as to be able to reciprocate along the second hot runner 1oVC, and the rear end of the inner stem 17 penetrates the outer stem 8 and protrudes into the space 14. It is fixed to a movably housed piston 16.
１８はパルプブツシュ４とピストン１６との間の室１８
′に流体を送る流路、１９はピストン１６と固定型１の
後壁との間の室１９’に流体を送る流路、２１は可動型
、２２はキャビティ、２３は（ンシュレータ、２４は）
々ンドヒータである。上記ホットランナ金型はマニホル
ド３において第１、第２樹脂通路１１．１２が多数に分
岐し、それに応じて第１、第２ホツトランナが設けられ
、成形品を多数個取りできるようになっている。18 is a chamber 18 between the pulp bush 4 and the piston 16;
19 is a flow path that sends fluid to a chamber 19' between the piston 16 and the rear wall of the fixed mold 1, 21 is a movable mold, 22 is a cavity, 23 is an insulator, and 24 is an insulator.
It is a dual heater. In the above-mentioned hot runner mold, first and second resin passages 11 and 12 are branched into many branches in the manifold 3, and first and second hot runners are provided accordingly, so that a large number of molded products can be produced. .
次に上記のようなホットランナ金型を使用し、多層体か
らなる成形品を成形する方法を説明する。Next, a method for molding a multilayer molded product using the hot runner mold as described above will be described.
第１図４非成形時の状態を示し、室１９′に流体を送り
、ピストン１６は固定型１の後壁から離れる方向に前進
している。これにより第１、第２ホツトランナ７．１０
の出口ゲート６，９はいずれもインナステム１７により
閉鎖されている。FIG. 14 shows a non-molding state, in which fluid is sent to the chamber 19' and the piston 16 moves forward in a direction away from the rear wall of the stationary mold 1. As a result, the first and second hot runners 7.10
Both exit gates 6 and 9 are closed by an inner stem 17.
ここで室１８′に流体を送ると、第２図に示すようにピ
ストン１６は後退し、それによりインナステム１７がゲ
ート６．９を開放する。この状態で第１ホツトランナ７
に第１樹脂材料Ａを供給し、出口ゲート６を経てキャビ
ティ２２に注出する。この際第１樹脂材料Ａの注出量は
キャビティ２２に対し所定比率となるようにする。When fluid is now delivered to chamber 18', piston 16 is retracted, as shown in FIG. 2, thereby causing inner stem 17 to open gate 6.9. In this state, the first hot runner 7
The first resin material A is supplied to and poured out into the cavity 22 through the exit gate 6. At this time, the amount of the first resin material A poured out is set to be a predetermined ratio to the cavity 22.
第１樹脂材料Ａの注出の際、キャビティ２２内は完全に
充填されずに樹脂圧が低く、また第２樹脂通路１２には
逆止弁１３が設けられているので、第１樹脂材料Ａによ
って第２樹脂材料Ｂが逆流することはない。When pouring out the first resin material A, the inside of the cavity 22 is not completely filled and the resin pressure is low, and since the second resin passage 12 is provided with a check valve 13, the first resin material A This prevents the second resin material B from flowing backward.
次に第２ホツトランナｌＯに第２樹脂材料Ｂを供給し、
出口ゲート６，９を経てキャビティ２２内に注出する。Next, supplying the second resin material B to the second hot runner lO,
It is poured into the cavity 22 through the exit gates 6 and 9.
注出された第２樹脂材料Ｂは第１樹脂材料Ａ内に潜り込
むこととなり、この際その注入量はキャビティ２２に対
し所定比率となるようにする。第２樹脂材料Ｂの注出の
際、キャビティ２２内は完全に充填きれずに樹脂圧が低
く、また第１樹脂通路１１には射出機本体の保持圧が作
用しているので、第２樹脂材料Ｂによって第１樹脂材料
人が逆流することはない。The poured second resin material B will sink into the first resin material A, and at this time, the amount of the poured second resin material B will be in a predetermined ratio to the cavity 22. When pouring out the second resin material B, the inside of the cavity 22 is not completely filled and the resin pressure is low, and the holding pressure of the injection machine main body is acting on the first resin passage 11, so the second resin material B is poured out. Material B will not cause the first resin material to flow backward.
次いで第１ホツトランナ７に再び第１樹脂材料Ａを供給
し、出口ゲート６を経てキャビティ２２に供給する。こ
の際第１樹脂材料Ａの注出量はキャビティ２２に対し所
定比率、すなわち前記のような３回の注出によυキャビ
ティ２２全体が充填されるようにする。第１樹脂材料Ａ
の注出の際、キャビティ２２内は完全に充填されて樹脂
圧が高くなるが、第２樹脂通路１２には逆止弁１３が設
けられているので第１樹脂材料Ａによって第２樹脂材料
Ｂが逆流することはない。Next, the first resin material A is again supplied to the first hot runner 7 and supplied to the cavity 22 through the exit gate 6. At this time, the amount of the first resin material A poured into the cavity 22 is set at a predetermined ratio, that is, the entire υ cavity 22 is filled by pouring three times as described above. First resin material A
When pouring out the resin, the inside of the cavity 22 is completely filled and the resin pressure increases, but since the second resin passage 12 is provided with a check valve 13, the first resin material A causes the second resin material B to flow. will not flow backwards.
次いで室１９′に再度流体を送ると、第１図に示したよ
うな状態に戻り、インナステム１７によってゲート６．
９が双方共閉鎖される。Next, when fluid is supplied to the chamber 19' again, the state shown in FIG. 1 is restored, and the inner stem 17 causes the gate 6.
9 are both closed.
このように第１樹脂材料Ａ、第２樹脂材料Ｂ、第１樹脂
材料へのｊ閾で３回注出し、多層体からなる成形品が得
られるが、２回目の注出まではキャビティ２２が完全に
充填されずに樹脂圧が低く、３回目の注出によってはじ
めてキャビティ２２が完全に充填されて樹脂圧が高くな
るので、一方の樹脂通路、この場合第２樹脂通路１２に
逆止弁１３を設ければよい。第１樹脂通路１１に逆止弁
１３を設けてもよいことはもちろんである。In this way, the first resin material A, the second resin material B, and the first resin material are poured three times at the j threshold, and a molded product consisting of a multilayer body is obtained, but until the second pouring, the cavity 22 is Since the cavity 22 is not completely filled and the resin pressure is low, and the cavity 22 is completely filled and the resin pressure becomes high only after the third pouring, the check valve 13 is installed in one resin passage, in this case the second resin passage 12. All you have to do is set it up. Of course, a check valve 13 may be provided in the first resin passage 11.
第５図は成形品の一例を示し、第１．第２樹脂材料Ａ、
Ｂとしては、例えば第１樹脂材料Ａが気密性に劣るが不
透水性であり、第２樹脂材料Ｂが気密性に秀れるが透水
性であるというように、異なった性質の材料が使用され
る。そして上記のようなホットランナ金型を使用する場
合には、一般には第１、第２樹脂材料Ａ、Ｂとしては互
いに混合しにくいものが用いられる。FIG. 5 shows an example of a molded product. second resin material A,
As B, materials with different properties may be used, for example, the first resin material A has poor airtightness but is water impermeable, and the second resin material B has excellent airtightness but is water permeable. Ru. When using a hot runner mold as described above, the first and second resin materials A and B are generally made of materials that are difficult to mix with each other.
２回にわたって注出される第１樹脂材料Ａの注出量の比
率を変えることにより、第５図に示すように部分的に５
層からなる成形品を得ることができる。すなわち、第１
樹脂材料Ａの１回目の注出−１ｔｉ少くし、２回目の注
出量を多くすると、２回目の注出時において第１樹脂材
料には既に充填されている第２樹脂材料Ｂ内に潜シ込む
こととなり、成形品を５層にすることができる。これに
より第２樹脂層の肉厚な薄くすることができ、２釉の樹
脂間の物性の差（例えば熱膨張率）の影響を小さくでき
る。By changing the ratio of the amount of the first resin material A poured out twice, as shown in FIG.
A molded article consisting of layers can be obtained. That is, the first
If the first pouring amount of resin material A is reduced by -1ti and the second pouring amount is increased, the second resin material B, which has already been filled in the first resin material, will sneak into the second resin material B during the second pouring. This allows the molded product to be made into five layers. As a result, the second resin layer can be made thinner, and the influence of the difference in physical properties (for example, coefficient of thermal expansion) between the two glaze resins can be reduced.
この発明は上記のようであって、１つの出口ゲートから
異なった２種類の樹脂材料を注出して多層体からなる成
形品を成形することができるので、金型の内部構造が簡
単であって全体形状が小さくて済み、しかも各屠体が均
一な成形品を得ることができる。またインナステムのみ
を作動させればよいので、駆動部分の構造が簡単でその
重量も小さく、したがって成形品の多数個取りへの対応
がし易く、キャビティの配置が比較的自由となるだけで
なく、メインテナンスも行い易くなる。This invention is as described above, and since a molded product consisting of a multilayer body can be molded by pouring two different types of resin materials from one exit gate, the internal structure of the mold is simple. The overall shape can be small, and each carcass can be made into a uniform molded product. In addition, since only the inner stem needs to be actuated, the structure of the driving part is simple and its weight is small. Therefore, it is easy to handle multiple molded products, and the arrangement of the cavities is relatively free. Maintenance is also easier.
第１図はこの発明のホットランナ金型の１実施例を示す
断面図、第２〜４図は同上のものにより多層体からなる
成形凸金成形する方法を示す断面図、第５図は成形品の
１例を示す断面図、第６図は成形品の他の例を示す断面
図。
１・・・固 定 型 ５・・・ホットランナブ
ロック６．９・・・出口ゲート ７・・・第１ホツ
トランナ８・・・アウタステム １０・・・第２ホツト
ランナ１３・・・逆止弁 １４・・・空所
１６・・・ピストン １７・・・インナステム２１
・・・可動型 ２２・・・キャビティ特許出願人
岐阜ハスキー株式会社
の の
の のFig. 1 is a cross-sectional view showing one embodiment of the hot runner mold of the present invention, Figs. 2 to 4 are cross-sectional views showing a method of forming a convex mold consisting of a multilayer body using the same as above, and Fig. 5 is a FIG. 6 is a cross-sectional view showing one example of the molded product; FIG. 6 is a cross-sectional view showing another example of the molded product. 1... Fixed type 5... Hot runner block 6. 9... Outlet gate 7... First hot runner 8... Outer stem 10... Second hot runner 13... Check valve 14. ...Vacancy 16...Piston 17...Inner stem 21
...Movable type 22...Cavity patent applicant
Gifu Husky Co., Ltd.
Claims (1)
ットランナを形成し、この第１ホットランナ内にその出
口ゲートから先端部が離間したアウタステムを収容して
、その後端部を前記ホットランナブロックに固定し、こ
のアウタステムに先端部に前記第１ホットランナの出口
ゲートと整合する出口ゲートを有しかつ前記第１ホット
ランナと同心的な第２ホットランナを形成し、この第２
ホットランナ内にそれに沿つて往復移動可動なインナス
テムを収容し、このインナステムはその往復移動により
先端部が前記第１および第２ホットランナの各出口ゲー
トを開閉するようになつていることを特徴とする射出成
形用ホットランナ金型。 ２、ホットランナブロックに第１、第２樹脂通路を形成
するとともに、第１樹脂通路と連通しかつ出口ゲートを
有する第１ホットランナを形成し、この第１ホットラン
ナ内にその出口ゲートから先端部が離間したアウタステ
ムを収容して、その後端部を前記ホットランナブロック
に固定し、このアウタステムに先端部に前記第１ホット
ランナの出口ゲートと整合する出口ゲートを有しかつ前
記第１ホットランナと同心的な第２ホットランナを形成
し、この第２ホットランナ内にそれに沿つて往復移動可
動なインナステムを収容し、このインナステムはその往
復移動により先端部が前記第１および第２ホットランナ
の各出口ゲートを開閉するようになつており、前記第１
、第２樹脂通路の少くとも一方に逆止弁を設けたことを
特徴とする射出成形用ホットランナ金型。 ３、ホットランナブロックに出口ゲートを有する第１ホ
ットランナを形成し、この第１ホツトランナ内にその出
口ゲートから先端部が離間したアウタステムを収容して
、その後端部を前記ホットランナブロックに固定し、こ
のアウタステムに先端部に前記第１ホットランナの出口
ゲートと整合する出口ゲートを有しかつ前記第１ホット
ランナと同心的な第２ホットランナを形成し、この第２
ホットランナ内にそれに沿つて往復移動可能なインナス
テムを収容し、前記ホットランナブロックに空所を形成
してその内部にピストンを摺動可能に収容し、このピス
トンに前記インナステムの後端部を連結し、このインナ
ステムは流体圧による前記ピストンの作動により往復移
動し、その先端部が前記第１および第２ホットランナの
各出口ゲートを開閉するようになつていることを特徴と
する射出成形用ホットランナ金型。 ４、ホットランナブロックに出口ゲートを有する第１ホ
ットランナを形成し、この第１ホットランナ内にその出
口ゲートから先端部が離間したアウタステムを収容して
、その後端部を前記ホットランナブロックに固定し、こ
のアウタステムに先端部に前記第１ホットランナの出口
ゲートと整合する出口ゲートを有しかつ前記第１ホット
ランナと同心的な第２ホットランナを形成し、この第２
ホットランナ内にそれに沿つて往復移動可能なインナス
テムを収容し、このインナステムはその往復移動により
先端部が前記第１および第２ホットランナの各出口ゲー
トを開閉するようになつている射出成形用ホットランナ
金型を用い、前記インナステムを第２ホットランナの出
口ゲートから離間させて第１、第２ホットランナの出口
ゲートを双方とも開放し、この状態で第１ホットランナ
に第１樹脂材料を供給してその出口ゲートを経て可動型
のキャビティ内に注出し、次いで前記第２ホットランナ
に第２樹脂材料を供給してその出口ゲートおよび前記第
１ホットランナの出口ゲートを経て前記キャビティ内の
第１樹脂内に注出し、次いで第１ホットランナに前記と
同様の第１樹脂材料を供給してその出口ゲートを経て前
記キャビティ内に注出し、次いで前記インナステムによ
つて前記第１、第２ホットランナの出口ゲートを双方と
も閉鎖することを特徴とする射出成形方法。 ５、ホットランナブロックに出口ゲートを有する第１ホ
ットランナを形成し、この第１ホットランナ内にその出
口ゲートから先端部が離間したアウタステムを収容して
、その後端部を前記ホットランナブロックに固定し、こ
のアウタステムに先端部に前記第１ホットランナの出口
ゲートと整合する出口ゲートを有しかつ前記第１ホット
ランナと同心的な第２ホットランナを形成し、この第２
ホットランナ内にそれに沿つて往復移動可能なインナス
テムを収容し、このインナステムはその往復移動により
先端部が前記第１および第２ホットランナの各出口ゲー
トを開閉するようになつている射出成形用ホットランナ
金型を用い、前記インナステムの先端部を第２ホットラ
ンナの出口ゲートから離間させて第１、第２ホットラン
ナの出口ゲートを双方とも開放し、この状態で第１ホッ
トランナに第１樹脂材料を供給してその出口ゲートを経
て可動型のキャビティ内に注出し、次いで前記第２ホッ
トランナに第２樹脂材料を供給してその出口ゲートおよ
び前記第１ホットランナの出口ゲートを経て前記キャビ
ティ内の第１樹脂内に注出し、次いで第１ホットランナ
に前記と同様の第１樹脂材料を供給してその出口ゲート
を経て前記キャビティ内の第２樹脂内に注出し、次いで
前記インナステムによつて前記第１、第２ホットランナ
の出口ゲートを双方とも閉鎖することを特徴とする射出
成形方法。[Claims] 1. A first hot runner having an exit gate is formed in the hot runner block, and an outer stem whose tip end is spaced apart from the exit gate is housed in the first hot runner, and the rear end thereof is disposed within the first hot runner. a second hot runner fixed to the hot runner block, having an exit gate at its tip portion aligned with the exit gate of the first hot runner and forming a second hot runner concentrically with the first hot runner; 2
An inner stem is housed in the hot runner and is movable to reciprocate along the hot runner, and the tip of the inner stem opens and closes each outlet gate of the first and second hot runners by reciprocating the inner stem. Hot runner mold for injection molding. 2. Forming first and second resin passages in the hot runner block, and forming a first hot runner that communicates with the first resin passage and has an exit gate, and a tip from the exit gate to the first hot runner. an outer stem whose rear end is fixed to the hot runner block; the outer stem has an outlet gate at a distal end aligned with an outlet gate of the first hot runner; A second hot runner is formed concentrically with the second hot runner, and an inner stem that is movable in reciprocating motion along the second hot runner is housed within the second hot runner, and as the inner stem moves back and forth, the distal end portion of the inner stem is moved between the first and second hot runners. Each exit gate is opened and closed, and the first exit gate is opened and closed.
A hot runner mold for injection molding, characterized in that a check valve is provided in at least one of the second resin passages. 3. A first hot runner having an exit gate is formed in the hot runner block, an outer stem whose tip end is spaced apart from the exit gate is accommodated in the first hot runner, and its rear end is fixed to the hot runner block. , a second hot runner is formed on the outer stem, the second hot runner having an exit gate at its tip aligned with the exit gate of the first hot runner and concentric with the first hot runner;
An inner stem that can reciprocate along the hot runner is housed within the hot runner, a cavity is formed in the hot runner block, a piston is slidably housed therein, and a rear end of the inner stem is connected to the piston. The inner stem is reciprocated by the actuation of the piston by fluid pressure, and the tip thereof opens and closes each outlet gate of the first and second hot runners. runner mold. 4. A first hot runner having an exit gate is formed in the hot runner block, an outer stem whose tip end is spaced apart from the exit gate is accommodated in the first hot runner, and its rear end is fixed to the hot runner block. a second hot runner having an exit gate aligned with the exit gate of the first hot runner at a distal end of the outer stem and concentric with the first hot runner;
The hot runner for injection molding includes an inner stem that can be moved reciprocally along the hot runner, and a tip of the inner stem opens and closes each outlet gate of the first and second hot runners by reciprocating the inner stem. Using a runner mold, the inner stem is separated from the exit gate of the second hot runner, the exit gates of the first and second hot runners are both opened, and in this state, the first resin material is supplied to the first hot runner. The second resin material is poured into the cavity of the movable mold through the exit gate thereof, and then the second resin material is supplied to the second hot runner, and the second resin material is poured into the cavity of the movable mold through the exit gate and the exit gate of the first hot runner. Then, the same first resin material as described above is supplied to a first hot runner and poured into the cavity through the outlet gate, and then the first and second hot resin materials are poured into the cavity by the inner stem. An injection molding method characterized in that both exit gates of the runner are closed. 5. A first hot runner having an exit gate is formed in the hot runner block, an outer stem whose tip end is spaced apart from the exit gate is accommodated in the first hot runner, and its rear end is fixed to the hot runner block. a second hot runner having an exit gate aligned with the exit gate of the first hot runner at a distal end of the outer stem and concentric with the first hot runner;
The hot runner for injection molding includes an inner stem that can be moved reciprocally along the hot runner, and a tip of the inner stem opens and closes each outlet gate of the first and second hot runners by reciprocating the inner stem. Using a runner mold, the tip of the inner stem is separated from the exit gate of the second hot runner, the exit gates of the first and second hot runners are both opened, and in this state, the first resin is applied to the first hot runner. A material is supplied and poured into the cavity of the movable mold through an exit gate thereof, and a second resin material is then supplied to the second hot runner and poured into the cavity through the exit gate thereof and the exit gate of the first hot runner. Then, the same first resin material as described above is supplied to a first hot runner and poured through the outlet gate into the second resin in the cavity, and then by the inner stem. The injection molding method is characterized in that the exit gates of the first and second hot runners are both closed.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4780185A JPS61206612A (en) | 1985-03-11 | 1985-03-11 | Injection hot-runner mold and injection molding |
| US06/738,939 US4657496A (en) | 1984-06-04 | 1985-05-29 | Hot-runner mold for injection molding |
| AU43136/85A AU559486B2 (en) | 1984-06-04 | 1985-05-30 | Hot runner mould for multilayer injection |
| GB08513790A GB2163089B (en) | 1984-06-04 | 1985-05-31 | Hot-runner moulds |
| DE19853519921 DE3519921A1 (en) | 1984-06-04 | 1985-06-04 | MOLDING FORM WITH HEATED SPRING CHANNEL FOR INJECTION MOLDING |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4780185A JPS61206612A (en) | 1985-03-11 | 1985-03-11 | Injection hot-runner mold and injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61206612A true JPS61206612A (en) | 1986-09-12 |
| JPH0477652B2 JPH0477652B2 (en) | 1992-12-09 |
Family
ID=12785469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4780185A Granted JPS61206612A (en) | 1984-06-04 | 1985-03-11 | Injection hot-runner mold and injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61206612A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11165330A (en) * | 1997-09-25 | 1999-06-22 | Mitsubishi Gas Chem Co Inc | Injection molding machine for molding multilayer molding and method for injection molding of multilayer molding |
| EP0904922A3 (en) * | 1997-09-25 | 2000-01-26 | Mitsubishi Gas Chemical Company, Inc. | Injection molding apparatus for molding multi-layered article and method of injection-molding multi-layered article |
| US6344249B1 (en) | 1999-03-11 | 2002-02-05 | Mitsubishi Gas Chemical Company, Inc. | Multi-layered article |
| JP2005343099A (en) * | 2004-06-07 | 2005-12-15 | Nippon Parison Kk | Mold for preform of multilayer container |
| WO2008034839A1 (en) * | 2006-09-20 | 2008-03-27 | S.I.P.A. Societa Industrializzazione Progettazione E Automazione S.P.A. | Plugging rod |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543489A (en) * | 1977-06-09 | 1979-01-11 | Fujitsu Ltd | Receiver for phase difference navigation use |
| JPS5545374A (en) * | 1978-09-29 | 1980-03-31 | Shimadaya Honten:Kk | Preparation of won ton having long-term preservability |
-
1985
- 1985-03-11 JP JP4780185A patent/JPS61206612A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543489A (en) * | 1977-06-09 | 1979-01-11 | Fujitsu Ltd | Receiver for phase difference navigation use |
| JPS5545374A (en) * | 1978-09-29 | 1980-03-31 | Shimadaya Honten:Kk | Preparation of won ton having long-term preservability |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11165330A (en) * | 1997-09-25 | 1999-06-22 | Mitsubishi Gas Chem Co Inc | Injection molding machine for molding multilayer molding and method for injection molding of multilayer molding |
| EP0904922A3 (en) * | 1997-09-25 | 2000-01-26 | Mitsubishi Gas Chemical Company, Inc. | Injection molding apparatus for molding multi-layered article and method of injection-molding multi-layered article |
| US6322344B1 (en) | 1997-09-25 | 2001-11-27 | Mitsubishi Gas Chemical Co., Inc. | Injection molding apparatus for molding multi-layered articles |
| US6544459B2 (en) | 1997-09-25 | 2003-04-08 | Mitsubishi Gas Chemical Company, Inc. | Method of injection molding multi-layered articles |
| US6344249B1 (en) | 1999-03-11 | 2002-02-05 | Mitsubishi Gas Chemical Company, Inc. | Multi-layered article |
| JP2005343099A (en) * | 2004-06-07 | 2005-12-15 | Nippon Parison Kk | Mold for preform of multilayer container |
| WO2008034839A1 (en) * | 2006-09-20 | 2008-03-27 | S.I.P.A. Societa Industrializzazione Progettazione E Automazione S.P.A. | Plugging rod |
| US7942664B2 (en) | 2006-09-20 | 2011-05-17 | S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. | Injection nozzle plugging rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0477652B2 (en) | 1992-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |