JPH05253973A - Injection molding die - Google Patents
Injection molding dieInfo
- Publication number
- JPH05253973A JPH05253973A JP5838291A JP5838291A JPH05253973A JP H05253973 A JPH05253973 A JP H05253973A JP 5838291 A JP5838291 A JP 5838291A JP 5838291 A JP5838291 A JP 5838291A JP H05253973 A JPH05253973 A JP H05253973A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- fluid
- resin passage
- injection
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
- B29C45/1607—Multi-way nozzles specially adapted therefor having at least three different ways
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は射出成形用金型に関
し、特に複数の樹脂通路をもち、複数種類の樹脂を射出
することによりそれに応じた多層構造の製品を同時に複
数組得るための金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding die, and more particularly to a die having a plurality of resin passages and injecting a plurality of kinds of resins to obtain a plurality of multi-layered products at the same time. Regarding
【０００２】[0002]
【従来の技術】従来のこの種の金型は、その大部分にお
いてこの発明の実施例と同様であるから、この同様な部
分についてこの発明の実施例を示す図１〜４を参照して
説明する。この金型は固定金型Ａ，可動金型Ｂからな
り、固定金型Ａは同形の複数の第１，２多層成形部１，
２を具え、各多層成形部１，２は前記のように同形とな
っているので、図２〜４では第１多層成形部１を示すこ
ととする。多層成形部１，２はそれぞれ先端に第１，２
出口３，４を有する第１，２中心樹脂通路５，６と、少
なくとも１つ（この例では２つ）の第１，２周辺樹脂通
路７‐１，２；８‐１，２とを具え、周辺樹脂通路７‐
１，２，８‐１，２は中心樹脂通路５，６にその軸方向
に異なる位置において開口し、中心樹脂通路５，６内に
その軸線上を移動可能に第１，２ステム９，10が配置さ
れ、このステム９，10の後端は流体圧第１シリンダ11，
12内に配置された第１ピストン13，14に連結されてお
り、15，16；17，18は第１ピストン13，14の前後面側に
流体を供給する通気孔である。第１シリンダ11，12の後
方にさらに停止部材を構成する流体圧第２シリンダ19，
20が設けられ、この第２シリンダ19，20内に受圧面積が
第１ピストン13，14よりも大きくなっている第２ピスト
ン21，22が第１シリンダ11，12の室内に突出可能に収納
されており、23，24は第２ピストン21，22の後面側に流
体を供給する通気孔である。そしてステム９，10は通気
孔16，18へ流体を供給することにより出口３，４と樹脂
通路５，６，７，８との連通を阻止する全閉鎖位置（図
２）と、通気孔15，17へ流体を供給することにより出口
５と樹脂通路５，６，７，８との連通を許す全開放位置
（図３）との間を移動し、また通気孔16，23；18，24に
流体を供給することにより、第２ピストン21，22が第１
シリンダ11，12の室内に突出して第１ピストン13，14に
衝合し、それによってそれらの間の中間位置（図４）に
停止するようになっている。可動金型Ｂには第１，２キ
ャビティ25，26が設けられている。2. Description of the Related Art A conventional mold of this type is similar to the embodiment of the present invention for the most part, and this similar portion will be described with reference to FIGS. To do. This mold comprises a fixed mold A and a movable mold B. The fixed mold A is composed of a plurality of first and second multi-layer molding parts 1 of the same shape.
2 and each multilayer molding part 1 and 2 has the same shape as described above, the first multilayer molding part 1 is shown in FIGS. The multi-layer molding parts 1 and 2 have first and second ends, respectively.
It comprises first and second central resin passages 5 and 6 having outlets 3 and 4, and at least one (two in this example) first and second peripheral resin passages 7-1 and 8-1 and 8-2. , Peripheral resin passage 7-
1, 2, 8-1 and 2 are opened in the central resin passages 5 and 6 at different positions in the axial direction, and are movable in the central resin passages 5 and 6 along the axis thereof. And the rear ends of the stems 9 and 10 are the fluid pressure first cylinders 11 and
It is connected to the first pistons 13 and 14 arranged in the inside 12, and 15, 16; 17 and 18 are vent holes for supplying fluid to the front and rear surface sides of the first pistons 13 and 14, respectively. A fluid pressure second cylinder 19, which constitutes a stop member behind the first cylinders 11 and 12,
20 is provided, and second pistons 21 and 22 having a pressure receiving area larger than that of the first pistons 13 and 14 are housed in the second cylinders 19 and 20 so as to project into the chambers of the first cylinders 11 and 12. Reference numerals 23 and 24 are ventilation holes for supplying fluid to the rear surface side of the second pistons 21 and 22. The stems 9 and 10 are in a fully closed position (FIG. 2) that blocks the communication between the outlets 3 and 4 and the resin passages 5, 6, 7 and 8 by supplying fluid to the vents 16 and 18, and the vent 15 , 17 to move between the outlet 5 and the fully open position (FIG. 3) allowing communication with the resin passages 5, 6, 7, 8 and vent holes 16, 23; 18, 24 By supplying the fluid to the
It projects into the chamber of the cylinders 11 and 12 and abuts the first pistons 13 and 14, thereby stopping at an intermediate position between them (FIG. 4). The movable mold B is provided with first and second cavities 25 and 26.
【０００３】図７にはこのような金型における圧力流体
の制御回路が示されており、通気孔15，16，23；17，1
8，24に通気管29，30，31；33，34，35の一端が連結さ
れ、通気管29，33；30，34；31，35の他端は、それぞれ
第１，２，３送排気管37，38，39に連結されている。そ
してこれらの第１，２，３送排気管37，38，39はソレノ
イド弁からなる切換弁41，42，43を介して給気源45又は
大気と連通するようになっている。そしてこれらの切換
弁41，42，43は射出成形機46と制御部材47，48，49を介
して接続されていて、これらの制御部材47，48，49の作
動によって送排気管37，38，39は給気源45又は大気と連
通する。FIG. 7 shows a control circuit for pressure fluid in such a mold, which has vent holes 15, 16, 23;
One end of the ventilation pipes 29, 30, 31; 33, 34, 35 is connected to 8, 24, and the other ends of the ventilation pipes 29, 33; 30, 34; It is connected to pipes 37, 38 and 39. The first, second and third air supply / exhaust pipes 37, 38, 39 are communicated with the air supply source 45 or the atmosphere via switching valves 41, 42, 43 which are solenoid valves. The switching valves 41, 42, 43 are connected to the injection molding machine 46 via control members 47, 48, 49, and the operation of these control members 47, 48, 49 causes the exhaust pipes 37, 38, 39 communicates with the air supply source 45 or the atmosphere.
【０００４】このような金型では、各多層成形部１，２
の各通気孔15，17；16，18；23，24が、それぞれ切換弁
41，42，43に連結されていることから、両ステム９，10
の通気孔16，18へ流体を供給することによる出口３，４
と、樹脂通路５，６，７，８との連通を阻止する全閉鎖
位置への移動、通気孔15，17へ流体を供給することによ
る出口５と樹脂通路５，６，７，８との連通を許す全開
放位置への移動、又は通気孔16，23；18，24に流体を供
給することによる中間位置における停止等が同時に行わ
れるようになっている。図７は通気孔15，17は給気源４
１と連通し、通気孔15，17；16，18；23，24が大気と連
通し、両ステム９，10は全開放位置にある状態を示す。In such a mold, each of the multilayer molding parts 1 and 2 is
Ventilation holes 15, 17; 16, 18; 23, 24 of
Since it is connected to 41, 42, 43, both stems 9, 10
Outlets 3 and 4 by supplying fluid to the vent holes 16 and 18 of
Of the resin passages 5, 6, 7, and 8 to the completely closed position for preventing communication with the resin passages 5, 6, 7, and 8, and the outlet 5 and the resin passages 5, 6, 7, and 8 by supplying fluid to the ventilation holes 15 and 17 The movement to the fully open position that allows communication, or the stop in the intermediate position by supplying the fluid to the vent holes 16, 23; 18, 24, etc. are performed at the same time. In FIG. 7, the ventilation holes 15 and 17 are the air supply source 4.
1, the vent holes 15, 17; 16, 18; 23, 24 are in communication with the atmosphere, and both stems 9, 10 are in the fully open position.
【０００５】[0005]
【発明が解決しようとする課題】このような金型におい
て、３層成形品を成形する場合を図８〜11を参照して説
明すると、まず図８に示すスキン樹脂層ｘ形成用１次射
出において通気孔16，23；18，24に流体を供給して、ス
テム９，10を出口３，４と最外側の周辺樹脂通路７‐
２，８‐２を連通し、他の樹脂通路５，６，７‐１，８
‐１を閉鎖する位置に移動し、樹脂通路７‐２，８‐２
からスキン層ｘとなる第１樹脂ａを両キャビティ25，26
に注入すると、ホットランナの温度不均一や流動抵抗の
アンバランス等によって、両キャビティ25，26へ注入さ
れる樹脂量が等しくならないので、両スキン樹脂層ｘの
先端間には距離Ｄ１だけの差がつく。The case of molding a three-layer molded product in such a mold will be described with reference to FIGS. 8 to 11. First, the primary injection for forming the skin resin layer x shown in FIG. Fluid is supplied to the vent holes 16, 23; 18, 24, and the stems 9, 10 are connected to the outlets 3, 4 and the outermost peripheral resin passage 7-.
2, 8-2 communicate with each other, other resin passages 5, 6, 7-1, 8
-1 is moved to the position to close, and the resin passages 7-2, 8-2
To the skin layer x from the first resin a to both cavities 25, 26
, The resin amounts injected into the cavities 25 and 26 will not be equal due to temperature nonuniformity of the hot runner, imbalance of flow resistance, etc. Therefore, the distance D1 between the tips of both skin resin layers x is different. Get stuck.
【０００６】ついでこのようなところへ、図９に示すコ
ア樹脂層ｙ形成用２次射出を行うこととなり、その際に
おいては、通気孔15，17へ流体を供給して、ステム９，
10を出口３，４と全樹脂通路５，６，７，８との連通を
許す全開放位置へ移動し、これらの樹脂通路５，６，
７，８からコア樹脂層ｙとなる第２，３樹脂ｂ，ｃを両
キャビティ25，26に注入する。このようにすると、注入
された第２，３樹脂ｂ，ｃによるコア樹脂層ｙの先端間
の距離Ｄ３は小さいが、第１樹脂ａによるスキン樹脂層
ｘの先端間の距離Ｄ２は大きくなる。Then, the secondary injection for forming the core resin layer y shown in FIG. 9 is performed at such a place. At that time, the fluid is supplied to the vent holes 15 and 17, and the stem 9,
10 is moved to a fully open position that allows communication between the outlets 3, 4 and all resin passages 5, 6, 7, 8, and these resin passages 5, 6,
The second and third resins b and c, which form the core resin layer y from 7 and 8, are injected into both the cavities 25 and 26. By doing so, the distance D3 between the tips of the core resin layer y formed by the injected second and third resins b, c is small, but the distance D2 between the tips of the skin resin layer x formed by the first resin a is large.
【０００７】ついでこのようなところへ、図10に示すコ
ア樹脂層ｙをカットするカット樹脂層ｚ形成用３次射出
を行うこととなり、その際においては、ステム９，10を
図８に示す１次射出時と同じ位置とし、コア樹脂層ｙを
カットするためのスキン樹脂層ｘと同じ第１樹脂ａを第
１キャビティ25と、第２キャビティ26とに注入する。こ
のようにすると、注入された第２，３樹脂ｂ，ｃによる
コア樹脂層ｙの先端は第１キャビティ25におけるより
も、第２キャビティ26におけるほうが長くなり、第１樹
脂ａによるスキン樹脂層ｘの先端間の距離Ｄ４は小さく
なる。Then, the third injection for forming the cut resin layer z for cutting the core resin layer y shown in FIG. 10 is performed at such a place. At that time, the stems 9 and 10 are shown in FIG. At the same position as in the next injection, the same first resin a as the skin resin layer x for cutting the core resin layer y is injected into the first cavity 25 and the second cavity 26. By doing so, the tip of the core resin layer y formed by the injected second and third resins b and c becomes longer in the second cavity 26 than in the first cavity 25, and the skin resin layer x formed by the first resin a is formed. The distance D4 between the tips of the two becomes smaller.
【０００８】前記のようにして両キャビティ25，26に樹
脂が完全に充填された状態を示すのが図11であって、こ
れからわかるようにコア樹脂層ｙの先端は、第２キャビ
ティ26の方が長さＤ５だけ長く、カット樹脂層ｚはＤ６
だけ短くなっている。FIG. 11 shows a state in which both cavities 25, 26 are completely filled with resin as described above. As can be seen from this, the tip of the core resin layer y is closer to the second cavity 26. Is longer by D5, and the cut resin layer z is D6.
Is getting shorter.
【０００９】前記のような従来の金型では、前記のよう
にその成形品は各層ごとにその分布が異なって全体が均
一になりにくいという問題があり、このような問題を解
決する方策として、ノズルヒータ27でノズル部の樹脂を
加熱調整して各キャビティ25，26間の充填のアンバラン
スを調整することが行われているが、そのためにノズル
部の設定温度を変更しても、直ちに温度が安定的に変更
するのが困難であり、特に第２，３樹脂ｂ，ｃは金型の
温度変更の影響を迅速に受けることが困難であって、ノ
ズル部の設定温度の変更後20〜30分経過しないと、調整
後の結果を確認することができないことから、各キャビ
ティ25，26間の充填のアンバランスを調整するのに長時
間が必要であるという問題がある。In the conventional mold as described above, there is a problem that the molded product has a different distribution for each layer as described above and it is difficult to make the whole uniform, and as a measure for solving such a problem, The nozzle heater 27 heats and adjusts the resin in the nozzle part to adjust the imbalance in filling between the cavities 25 and 26. Therefore, even if the set temperature of the nozzle part is changed, the temperature immediately changes. It is difficult to change the temperature stably, and it is particularly difficult for the second and third resins b and c to be quickly affected by the temperature change of the mold. There is a problem that it takes a long time to adjust the imbalance of the filling between the cavities 25 and 26, because the result after the adjustment cannot be confirmed unless the time elapses.
【００１０】この発明の目的は、前記のような従来の金
型のもつ問題を解消し、複数の良好で、かつ均一な多層
成形品を容易な操作で効率よく成形できる射出成形用金
型を提供するにある。An object of the present invention is to solve the problems of the conventional molds described above and to provide an injection molding mold capable of efficiently molding a plurality of good and uniform multi-layer molded products by an easy operation. To provide.
【００１１】[0011]
【課題を解決するための手段】この発明は前記のような
目的を達成するために、前記のような従来の射出成形用
金型において、流体シリンダの作動用流体回路を各多層
成形部ごとに設け、それらの各流体回路ごとに制御手段
を設けたことを特徴とするものである。また制御手段は
各流体回路への流体の供給排出に寄与する制御弁を作動
するタイミングを決めるタイマを有し、さらに製品サン
プルの樹脂分布を読取る検知手段を設け、制御手段はこ
の検知手段から出力する信号を入力し、これに基いてタ
イマの作動時間を設定するようになっている。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a conventional injection molding die as described above, wherein an operating fluid circuit of a fluid cylinder is provided for each multilayer molding part. It is characterized in that a control means is provided for each of the fluid circuits. Further, the control means has a timer for deciding the timing for operating the control valve that contributes to the supply and discharge of the fluid to each fluid circuit, and further has a detection means for reading the resin distribution of the product sample, and the control means outputs from this detection means. Signal is input, and the operation time of the timer is set based on this signal.
【００１２】[0012]
【作用】前記のようなこの発明において、射出成形機の
射出信号によってタイマの作動スタートが実施され、製
品サンプルからえられる第１，２検知部材からの信号に
基いて制御部材から出力される制御信号によって決定さ
れるタイムだけ各タイマが作動し、例えば図11に示すよ
うな成形品についていえば、第１多層成形部１の第１ス
テムが第１樹脂を射出する中間位置に移動していると
き、第２多層成形部２では第２ステム10が全閉位置とな
り、ついで１次射出完了信号が出力されて、第１多層成
形部１の第１ステムが全開位置となって、全樹脂による
２次射出に移行し、第２多層成形部では第２ステムが中
間位置となっていて、第１樹脂の射出射出を継続してい
る。In the present invention as described above, the operation of the timer is started by the injection signal of the injection molding machine, and the control output from the control member based on the signals from the first and second detection members obtained from the product sample. Each timer operates for the time determined by the signal, and for example, in the case of a molded product as shown in FIG. 11, the first stem of the first multilayer molding part 1 is moved to the intermediate position where the first resin is injected. At this time, in the second multilayer molding part 2, the second stem 10 is in the fully closed position, then the primary injection completion signal is output, and the first stem of the first multilayer molding part 1 is in the fully open position. After shifting to the secondary injection, the second stem is at the intermediate position in the second multilayer molding section, and the injection injection of the first resin is continued.
【００１３】[0013]
【実施例】図１〜７に示すこの発明の実施例において、
前記従来の射出成形用金型と同様な部分には同一の符号
を引用してその説明を省略し、主として異なる点につい
て説明することとする。その異なる点は、固定型Ａの第
１，２ステム９，10を作動する制御回路に属し、図５，
６に示す実施例において、通気孔15，16，23；17，18，
24に一端が連結されている通気管29，30，31；33，34，
35の他端を直接第１，２，３，４，５，６切換弁51，5
2，53，54，55，56を介して給気源45又は大気と連通す
るようになっている。そしてこれらの切換弁51，52，5
3，54，55，56は、第１，２，３，４，５，６タイマ6
1，62，63，64，65に接続され、これらのタイマ61，6
2，63，64，65は制御部材69を介して射出成形機46に接
続されている。そして第１，２多層成形部１，２におけ
る２次射出後に、それらによる製品サンプルの先端と後
端の位置及び樹脂分布を検出する紫外線又は赤外線セン
サからなる第１，２センサ71，72を有する第１，２検知
部材73，74が設けられ、これらは制御部材69に接続され
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiments of the present invention shown in FIGS.
The same parts as those of the conventional injection molding die will be designated by the same reference numerals and the description thereof will be omitted, and the different points will be mainly described. The difference lies in the control circuit that operates the first and second stems 9 and 10 of the fixed type A.
In the embodiment shown in FIG. 6, the ventilation holes 15, 16, 23; 17, 18,
Vent pipes 29, 30, 31; 33, 34, one end of which is connected to 24
The other end of 35 is directly connected to the first, second, third, fourth, fifth and sixth switching valve 51, 5
It is adapted to communicate with the air supply source 45 or the atmosphere via 2, 53, 54, 55, 56. And these switching valves 51, 52, 5
3, 54, 55, 56 are the first, second, third, fourth, fifth, sixth timer 6
1, 62, 63, 64, 65 connected to these timers 61, 6
2, 63, 64 and 65 are connected to the injection molding machine 46 via a control member 69. Then, after the secondary injection in the first and second multilayer molding parts 1 and 2, it has first and second sensors 71 and 72 composed of ultraviolet or infrared sensors for detecting the positions of the front and rear ends of the product sample and the resin distribution by them. First and second detection members 73 and 74 are provided, and these are connected to the control member 69.
【００１４】図５では、タイマ61〜63の作動によって第
１多層成形部１の第１ステム９が第１樹脂aを射出する
中間位置に移動しているとき、第２多層成形部２ではタ
イマ64〜66の作動によって第２ステム10が全閉位置とな
っており、図６は１次射出完了信号が出力されて、第１
多層成形部１の第１ステム９が全開位置となって、全樹
脂ａ，ｂ，ｃによる２次射出に移行しており、第２多層
成形部２では第２ステム10が中間位置となっていて、第
１樹脂aを射出する１次射出を継続していることを示
す。この場合タイマ61〜63；64〜66の作動スタートは射
出成形機46の射出信号によって実施され、そこに設定さ
れるタイムは、製品サンプルからえられる第１，２検知
部材73，74からの信号に基いて制御部材69から出力され
る制御信号によって決定される。この実施例では、ステ
ム９，10の作動を電気的なソレノイド弁で行うようにな
っているが、これ以外に手動又は機械的手段で行うよう
にしてもよく、また周辺樹脂通路が２つのものを示した
が、周辺樹脂通路は１つあるいは３つ以上であってもよ
い。In FIG. 5, when the first stem 9 of the first multilayer molding unit 1 is moved to the intermediate position for injecting the first resin a by the operation of the timers 61 to 63, the timer of the second multilayer molding unit 2 is changed. The second stem 10 is in the fully closed position by the operations of 64 to 66, and the first injection completion signal is output in FIG.
The first stem 9 of the multi-layer molding part 1 is in the fully open position, and the secondary injection by all the resins a, b, c is in progress, and in the second multi-layer molding part 2, the second stem 10 is in the intermediate position. Indicates that the primary injection for injecting the first resin a is continued. In this case, the operation start of the timers 61 to 63; 64 to 66 is performed by the injection signal of the injection molding machine 46, and the time set therein is the signal from the first and second detection members 73 and 74 obtained from the product sample. Is determined by the control signal output from the control member 69. In this embodiment, the operation of the stems 9 and 10 is performed by an electric solenoid valve, but other than this, it may be performed manually or by a mechanical means, and two peripheral resin passages are provided. However, the number of peripheral resin passages may be one or three or more.
【００１５】[0015]
【発明の効果】この発明は前記のようであって、ステム
を全閉鎖位置と、全開放位置と、その中間位置にもたら
す流体シリンダの作動用流体回路を各多層成形部ごとに
設け、それらの各流体回路ごとに制御手段を設け、射出
成形機の射出信号によってタイマの作動スタートを実施
し、製品サンプルからえられる第１，２検知部材からの
信号に基いて制御部材から出力される制御信号によっ
て、各タイマのタイムを決定するようになっているの
で、複数の良好で、かつ均一な多層成形品を容易な操作
で効率よく成形できるという効果がある。As described above, the present invention has the above-described structure, in which each of the multi-layer molding parts is provided with a working fluid circuit for the fluid cylinder that brings the stem to the fully closed position, the fully open position, and an intermediate position thereof. A control means is provided for each fluid circuit, the operation of the timer is started by the injection signal of the injection molding machine, and the control signal output from the control member based on the signal from the first and second detection members obtained from the product sample. Since the time of each timer is determined by the above, there is an effect that a plurality of good and uniform multilayer molded products can be efficiently molded by an easy operation.
【図１】この発明の実施例の縦断正面図である。FIG. 1 is a vertical sectional front view of an embodiment of the present invention.
【図２】同上の第１多層成形部のステムが全閉鎖位置に
ある状態を示す縦断正面図である。FIG. 2 is a vertical cross-sectional front view showing a state in which the stem of the first multilayer molding part is in the fully closed position.
【図３】同上のステムが全開放位置にある状態を示す縦
断正面図である。FIG. 3 is a vertical sectional front view showing a state in which the stem is in the fully open position.
【図４】同上のステムが中間位置にある状態を示す縦断
正面図である。FIG. 4 is a vertical cross-sectional front view showing a state in which the above stem is in an intermediate position.
【図５】同上の制御回路の一作動状態を示す説明図であ
る。FIG. 5 is an explanatory diagram showing one operating state of the control circuit of the above.
【図６】同上の他の作動状態を示す説明図である。FIG. 6 is an explanatory view showing another operating state of the above.
【図７】この発明と同種の従来の射出成形装置の制御回
路の図５と同様な説明図である。FIG. 7 is an explanatory view similar to FIG. 5 of a control circuit of a conventional injection molding apparatus of the same type as the present invention.
【図８】同上による１次射出作業後におけるキャビティ
内の樹脂の充填状態を示す説明図である。FIG. 8 is an explanatory view showing a filled state of resin in the cavity after the primary injection work according to the above.
【図９】同２次射出作業後におけるキャビティ内の樹脂
の充填状態を示す説明図である。FIG. 9 is an explanatory diagram showing a resin filled state in a cavity after the second injection work.
【図１０】同３次射出作業後におけるキャビティ内の樹
脂の充填状態を示す説明図である。FIG. 10 is an explanatory diagram showing a resin filled state in the cavity after the third injection work.
【図１１】同射出作業終了後におけるキャビティ内の樹
脂の充填状態を示す説明図である。FIG. 11 is an explanatory diagram showing a filled state of the resin in the cavity after completion of the injection work.
Ａ 固定型 Ｂ 可動型 １ 第１多層成形部 ２ 第２多層成形部 ３ 第１出口 ４ 第２出口 ５ 第１中心樹脂通路 ６ 第２中心樹脂通路 ７ 第１周辺樹脂通路 ８ 第２周辺樹脂通路 ９ 第１ステム 10 第２ステム 11，12 第１シリンダ 13，14 第１ピストン 15〜18 通気孔 19，20 第２シリンダ 21，22 第２ピストン 23，24 通気孔 25 第１キャビティ 26 第２キャビティ 29〜31 通気管 33〜35 通気管 45 給気源 46 射出成形機 51〜56 第１〜６切換弁 61〜66 第１〜６タイマ 69 制御部材 73 第１検知部材 74 第２検知部材 A Fixed type B Movable type 1 First multilayer molding section 2 Second multilayer molding section 3 First outlet 4 Second outlet 5 First central resin passage 6 Second central resin passage 7 First peripheral resin passage 8 Second peripheral resin passage 9 1st stem 10 2nd stem 11 and 12 1st cylinder 13 and 14 1st piston 15 to 18 vent hole 19 and 20 2nd cylinder 21 and 22 2nd piston 23 and 24 vent hole 25 1st cavity 26 2nd cavity 29-31 Vent pipe 33-35 Vent pipe 45 Air supply source 46 Injection molding machine 51-56 1st-6th switching valve 61-66 1st-6th timer 69 Control member 73 1st detection member 74 2nd detection member
Claims (3)
の樹脂通路に開口する少くとも１つの周辺樹脂通路と、
中心樹脂通路内にその軸線上を移動可能に配置されたス
テムと、このステムを中心樹脂通路および周辺樹脂通路
の全てと前記出口との連通が阻止される全閉鎖位置と、
中心樹脂通路および周辺樹脂通路の全てと前記出口との
連通が許される全開放位置との間を移動させ、またそれ
らの間の中間位置で停止させる流体シリンダとを有する
多層成形部を複数組具えた射出成形用金型において、前
記流体シリンダの作動用流体回路を各多層成形部ごとに
設け、それらの各流体回路ごとに制御手段を設けたこと
を特徴とする射出成形用金型。1. A central resin passage having an outlet at its tip, and at least one peripheral resin passage opening into this resin passage,
A stem movably arranged on the axis in the central resin passage, and a fully closed position in which the stem is prevented from communicating with all of the central resin passage and the peripheral resin passage and the outlet,
A plurality of multi-layer molding parts having a fluid cylinder that moves between all the central resin passages and the peripheral resin passages and the fully open position where communication with the outlet is allowed, and stops at an intermediate position between them. In the injection molding die, an operating fluid circuit of the fluid cylinder is provided for each multilayer molding section, and control means is provided for each of the fluid circuits.
出に寄与する制御弁を作動するタイミングを決めるタイ
マを有する請求項１の射出成形用金型。2. A mold for injection molding according to claim 1, wherein the control means has a timer for deciding a timing for operating a control valve that contributes to supply and discharge of fluid to and from each fluid circuit.
段を設け、制御手段はこの検知手段から出力する信号を
入力し、これに基いてタイマの作動時間を設定するよう
になっている請求項２の射出成形用金型。3. A detection means for reading the resin distribution of a product sample is provided, and the control means inputs a signal output from this detection means and sets the operating time of the timer based on this. Injection mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5838291A JP3041067B2 (en) | 1991-02-28 | 1991-02-28 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5838291A JP3041067B2 (en) | 1991-02-28 | 1991-02-28 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05253973A true JPH05253973A (en) | 1993-10-05 |
| JP3041067B2 JP3041067B2 (en) | 2000-05-15 |
Family
ID=13082783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5838291A Expired - Lifetime JP3041067B2 (en) | 1991-02-28 | 1991-02-28 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3041067B2 (en) |
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