JPH0732431A - Continuous plasticizing type injection molding device - Google Patents
Continuous plasticizing type injection molding deviceInfo
- Publication number
- JPH0732431A JPH0732431A JP20098493A JP20098493A JPH0732431A JP H0732431 A JPH0732431 A JP H0732431A JP 20098493 A JP20098493 A JP 20098493A JP 20098493 A JP20098493 A JP 20098493A JP H0732431 A JPH0732431 A JP H0732431A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- accumulator
- continuous
- plasticizing
- valve
- 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 9
- 238000002347 injection Methods 0.000 claims abstract description 53
- 239000007924 injection Substances 0.000 claims abstract description 53
- 229920005989 resin Polymers 0.000 claims abstract description 45
- 239000011347 resin Substances 0.000 claims abstract description 45
- 239000004014 plasticizer Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、可塑化樹脂のアキュー
ムレータ装置を介在させて連続可塑化装置と射出装置と
を接続した連続可塑化式射出成形装置に係り、特に樹脂
替え・色替え性の向上に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous plasticizing type injection molding apparatus in which a continuous plasticizing apparatus and an injection apparatus are connected with an accumulator apparatus for plasticizing resin interposed therebetween, and particularly to a resin changing / color changing property. Regarding improvement.
【０００２】[0002]
【従来の技術】本出願人は、先に、連続可塑化装置を完
全に連続運転することができる上記連続可塑化式射出成
形装置を提案した（特開平４−２８６６１７号）。この
装置は、連続可塑化装置とアキュームレータ装置とを常
に連通状態におき、射出装置は射出時（保圧を含む）を
除き、少なくとも計量時には連続可塑化装置及びアキュ
ームレータ装置に連通させて両装置のいずれからも可塑
化樹脂を受入れることができるように構成されている。2. Description of the Related Art The applicant of the present invention has previously proposed the above continuous plasticizing type injection molding apparatus capable of completely continuously operating the continuous plasticizing apparatus (JP-A-4-286617). In this device, the continuous plasticizing device and the accumulator device are always in communication with each other, and the injection device communicates with the continuous plasticizing device and the accumulator device at least at the time of measurement except at the time of injection (including holding pressure). Both are configured to be able to receive the plasticizing resin.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記連続可
塑化式射出成形装置は、樹脂替え・色替え時に、アキュ
ームレータ装置からの高速パージ（高速押出）を行う
と、樹脂流路抵抗により樹脂圧が高くなり、その高圧に
より樹脂が連続可塑化装置側へ逆流して、脱気口から流
出する、いわゆるベントアップを生じたり、また、連続
可塑化装置の軸受部に過度のスラスト荷重を与えたりす
るなどの不都合があった。By the way, in the above continuous plasticization type injection molding apparatus, when high speed purging (high speed extrusion) from the accumulator device is performed at the time of resin change / color change, the resin pressure is reduced by the resin flow path resistance. Due to the high pressure, the resin flows back to the continuous plasticizer side and flows out from the degassing port, so-called vent up occurs, or an excessive thrust load is applied to the bearing part of the continuous plasticizer. There was such inconvenience.
【０００４】他方、アキュームレータ装置からのパージ
速度が遅いと、アキュームレータ装置内や樹脂流路中の
樹脂が部分的に残り易く、完全に樹脂替え・色替えを行
うのに長時間を要する欠点があった。On the other hand, if the purging speed from the accumulator device is slow, the resin in the accumulator device or in the resin flow passage is likely to remain partially, and there is a drawback that it takes a long time to completely change the resin and color. It was
【０００５】本発明は、前述したような欠点を解決し、
アキュームレータ装置からの高速パージを可能にして、
アキュームレータ装置及び射出装置を含むそれより下流
側部分の可塑化樹脂のパージをより効果的かつ完全に行
うことのできる連続可塑化式射出成形装置を提供するこ
とを目的としている。The present invention solves the above-mentioned drawbacks,
Enables high-speed purging from the accumulator device,
An object of the present invention is to provide a continuous plasticization type injection molding apparatus which can more effectively and completely purge the plasticizing resin in the downstream portion including the accumulator apparatus and the injection apparatus.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明は、合成樹脂材料の連続可塑化装置と、先端部
を前記連続可塑化装置の流出路に接続された可塑化樹脂
のアキュームレータ装置と、同じく先端部を前記流出路
に接続された射出装置と、前記流出路中に設けられ、計
量時においては連続可塑化装置をアキュームレータ装置
及び射出装置にそれぞれ連通させ、射出時においては射
出装置側を閉鎖して連続可塑化装置とアキュームレータ
装置とを連通させ、さらに、樹脂替え・色替え時におい
ては連続可塑化装置側を閉鎖してアキュームレータ装置
と射出装置とを連通させるように構成された弁装置とか
らなる連続可塑化式射出成形装置にある。SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a continuous plasticizer for synthetic resin material, and a plasticized resin accumulator whose tip is connected to the outflow passage of the continuous plasticizer. A device, an injection device whose tip portion is also connected to the outflow passage, and a continuous plasticizing device, which is provided in the outflow passage and is connected to the accumulator device and the injection device at the time of weighing, and makes an injection at the time of injection. The device is closed to connect the continuous plasticizing device and the accumulator device to each other, and when the resin is changed or the color is changed, the continuous plasticizer device is closed to connect the accumulator device to the injection device. It is a continuous plasticizing injection molding machine consisting of a valve device.
【０００７】なお、上記弁装置は三方切換弁とすること
が好ましく、さらに、アキュームレータ装置のプランジ
ャが押出限位置にあるとき、このプランジャの先端部が
三方切換弁の合流部まで入り込むように形成することが
好ましい。The valve device is preferably a three-way switching valve. Further, when the plunger of the accumulator device is at the push-out limit position, the tip of the plunger is formed so as to enter the confluence portion of the three-way switching valve. It is preferable.
【０００８】[0008]
【作用】計量時及び射出時においては、弁装置によって
連続可塑化装置、アキュームレータ装置及び射出装置の
連通、しゃ断を上記のようにすることにより完全な連続
可塑化運転を行うことができる。また、樹脂替え・色替
え時には、連続可塑化装置側を閉鎖してアキュームレー
タ装置と射出装置とを連通することにより、連続可塑化
装置からの可塑化樹脂の流出を一時的にしゃ断すること
により樹脂圧力やスクリュ内の樹脂充満率が変化する
が、アキュームレータ装置を高速パージすることが可能
になり短時間で済むため、連続可塑化装置への影響は少
なく、アキュームレータ装置およびその下流側の流路中
の可塑化樹脂をより効果的に排出することができる。さ
らに、アキュームレータ装置と射出装置は、それらの先
端部が連続可塑化装置からの流出路に接続されているた
め、両装置の可塑化樹脂はそれらのプランジャによって
ほぼ完全に排出される。During metering and injection, a complete continuous plasticizing operation can be performed by the valve device for connecting and disconnecting the continuous plasticizing device, the accumulator device and the injection device as described above. Also, at the time of resin change / color change, by closing the continuous plasticizing device side and connecting the accumulator device and the injection device, it is possible to temporarily block the outflow of the plasticized resin from the continuous plasticizing device. Although the pressure and the resin filling rate in the screw change, the accumulator device can be purged at high speed and can be completed in a short time.Therefore, the effect on the continuous plasticizer is small, and the flow path in the accumulator device and its downstream side is small. The plasticized resin can be discharged more effectively. Furthermore, since the accumulator device and the injection device have their tips connected to the outflow passage from the continuous plasticizing device, the plasticizing resin of both devices is almost completely discharged by their plungers.
【０００９】[0009]
【実施例】以下本発明の実施例について図１ないし図４
を参照して説明する。１０は連続可塑化装置で、図示し
ない加熱及び冷却装置を有する可塑化シリンダ１１とこ
れに係合された可塑化スクリュ１２からなっている。可
塑化スクリュ１２は同方向または異方向回転の２軸スク
リュで、駆動装置１３により回転のみを与えられる。可
塑化シリンダ１１の元端寄りには第１供給口１４が開口
され、第１フィーダ１５により合成樹脂材料が供給され
るようになっている。可塑化シリンダ１１の略中央位置
には、第２供給口１６が開口され、第２フィーダ１７に
より、例えばガラス繊維，カーボン繊維ならびにマイカ
等の強化あるいは充填材料が供給されるようになってい
る。可塑化シリンダ１１の左方寄りにはベント口１８
が、開口されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
Will be described with reference to. Reference numeral 10 denotes a continuous plasticizing device, which comprises a plasticizing cylinder 11 having a heating and cooling device (not shown) and a plasticizing screw 12 engaged with the plasticizing cylinder 11. The plasticizing screw 12 is a biaxial screw that rotates in the same direction or in different directions, and is given only rotation by the drive device 13. A first supply port 14 is opened near the base end of the plasticizing cylinder 11, and a synthetic resin material is supplied by the first feeder 15. A second supply port 16 is opened at a substantially central position of the plasticizing cylinder 11, and a reinforcing or filling material such as glass fiber, carbon fiber and mica is supplied by the second feeder 17. A vent port 18 is provided on the left side of the plasticizing cylinder 11.
But it is open.
【００１０】可塑化シリンダ１１の先端に開口された可
塑化樹脂の流出路１９には、三方切換弁２７を介してア
キュームレータ装置２０の先端部（図１において下端
部）が接続されている。アキュームレータ装置２０はシ
リンダ２１とプランジャ２２とからなり、プランジャ２
２の先端側（図１において下端側）にアキュームレータ
室２３を形成している。アキュームレータ室２３の周囲
は図示しないヒータによって加熱されるようになってい
る。プランジャ２２の上端にはロッド２４を介して駆動
シリンダ２５のピストン２６が連結されている。A tip end portion (lower end portion in FIG. 1) of the accumulator device 20 is connected to a plasticizing resin outflow passage 19 opened at a tip end of the plasticizing cylinder 11 via a three-way switching valve 27. The accumulator device 20 includes a cylinder 21 and a plunger 22, and the plunger 2
An accumulator chamber 23 is formed on the tip end side (the lower end side in FIG. 1) of 2. The periphery of the accumulator chamber 23 is heated by a heater (not shown). A piston 26 of a drive cylinder 25 is connected to the upper end of the plunger 22 via a rod 24.
【００１１】三方切換弁２７は、図１に示す状態にある
とき、流出路１９をアキュームレータ室２３に接続させ
ると共に、図１において下方へ伸びる流路２８を介して
射出装置３０の先端部に接続させるようになっている。
なお、流出路１９とアキュームレータ装置２０との接続
状態と同様に、流路２８を射出装置３０の計量室３３の
最先端に接続してもよい。When in the state shown in FIG. 1, the three-way switching valve 27 connects the outflow passage 19 to the accumulator chamber 23 and also connects to the tip of the injection device 30 via the passage 28 extending downward in FIG. It is designed to let you.
Note that the flow path 28 may be connected to the leading end of the measuring chamber 33 of the injection device 30 as in the connection state of the outflow passage 19 and the accumulator device 20.
【００１２】三方切換弁２７は、図１に示す状態のほ
か、図３及び図４に示すように、切換えられるようにな
ってる。すなわち、図３に示すように、流出路１９を射
出装置３０からしゃ断し、アキュームレータ装置２０に
のみ接続させる切換位置と、図４に示すように、流出路
１９をアキュームレータ装置２０及び射出装置３０から
しゃ断し、アキュームレータ装置２０と射出装置３０と
を接続させる切換位置と、さらには図示しないが、流出
路１９を射出装置３０にのみ接続させる切換位置とをそ
れぞれとるように構成されている。The three-way switching valve 27 can be switched as shown in FIGS. 3 and 4 in addition to the state shown in FIG. That is, as shown in FIG. 3, a switching position in which the outflow passage 19 is cut off from the injection device 30 and only connected to the accumulator device 20, and the outflow passage 19 is disconnected from the accumulator device 20 and the injection device 30 as shown in FIG. It is configured so as to have a switching position for disconnecting and connecting the accumulator device 20 and the injection device 30 and a switching position for connecting the outflow passage 19 to the injection device 30 only (not shown).
【００１３】なお、プランジャ２２の先端２２ａは、図
２に示すように、三方切換弁２７が図１に示す切換位置
にあるとき、三方切換弁２７内の合流部まで入り込み、
アキュームレータ室２３内の可塑化樹脂を完全に押出す
と共に、流出路１９から射出装置３０へ流れる可塑化樹
脂の滞留を防止するようになっている。As shown in FIG. 2, when the three-way switching valve 27 is in the switching position shown in FIG. 1, the tip 22a of the plunger 22 enters the confluence portion in the three-way switching valve 27,
The plasticized resin in the accumulator chamber 23 is completely extruded, and the plasticized resin flowing from the outflow passage 19 to the injection device 30 is prevented from accumulating.
【００１４】射出装置３０は、図示しないヒータによっ
て加熱される射出シリンダ３１とこれに係合された射出
プランジャ３２とからなり、アキュームレータ室２３か
ら供給される可塑化樹脂を計量室３３に貯えるようにな
っている。射出プランジャ３２の先端部は、これが図１
に示す前進限にあるとき、流路２８からの可塑化樹脂の
流れにより、該先端部にある可塑化樹脂をより容易に流
出させ得るように形成されている。この射出プランジャ
３２の後端にはロッド３４を介して射出駆動シリンダ３
５のピストン３６が連結されている。計量室３３は開閉
弁３７を介してノズル３８に接続されている。The injection device 30 comprises an injection cylinder 31 heated by a heater (not shown) and an injection plunger 32 engaged with the injection cylinder 31, and stores the plasticized resin supplied from the accumulator chamber 23 in the measuring chamber 33. Has become. The tip of the injection plunger 32 is shown in FIG.
When it is in the advance limit shown in (1), it is formed so that the plasticized resin at the tip can be more easily flowed out by the flow of the plasticized resin from the flow path 28. The injection drive cylinder 3 is attached to the rear end of the injection plunger 32 via a rod 34.
Five pistons 36 are connected. The measuring chamber 33 is connected to the nozzle 38 via an opening / closing valve 37.
【００１５】アキュームレータ装置２０の駆動シリンダ
２５の上室２５ａは、第１切換弁４１が図示の中立位置
にあるとき、メータイン用の電磁比例流量調整弁４２、
メータアウト用の電磁比例圧力調整弁４３を介してタン
ク４４及び下室２５ｂに接続され、上室２５ａの圧力を
制御しつつ上室２５ａ内の圧油をタンク４４へ逃がすと
共に、第１切換弁４１を図１において右方のｂ側へ切換
えたときには、油圧源４５から第１減圧弁４６によって
所定の圧力に制御された圧油を電磁比例流量調整弁４２
を介して供給されるようになっている。下室２５ｂは、
第１切換弁４１がｂ側へ切換えられると、タンク４４に
解放され、第１切換弁４１がａ側へ切換えられると、第
１減圧弁４６を介して油圧源４５に接続されるようにな
っている。なお、開閉弁４７はプランジャ２２の前進を
一時的に停止させるためのものである。The upper chamber 25a of the drive cylinder 25 of the accumulator device 20 has an electromagnetic proportional flow rate adjusting valve 42 for meter-in when the first switching valve 41 is in the neutral position shown in the drawing.
It is connected to the tank 44 and the lower chamber 25b via a meter-out electromagnetic proportional pressure adjusting valve 43, and while releasing the pressure oil in the upper chamber 25a to the tank 44 while controlling the pressure of the upper chamber 25a, the first switching valve When 41 is switched to the b side on the right side in FIG. 1, the pressure proportional oil controlled from the hydraulic pressure source 45 to the predetermined pressure by the first pressure reducing valve 46 is changed to the electromagnetic proportional flow rate adjusting valve 42.
It is designed to be supplied via. The lower chamber 25b is
When the first switching valve 41 is switched to the b side, it is released to the tank 44, and when the first switching valve 41 is switched to the a side, it is connected to the hydraulic pressure source 45 via the first pressure reducing valve 46. ing. The open / close valve 47 is for temporarily stopping the forward movement of the plunger 22.
【００１６】射出駆動シリンダ３５の後室３５ａは、第
２切換弁５１が図示の中立位置及びａ側の切換位置にあ
るとき、電磁リリーフ弁５２を介してタンク５３に接続
される。電磁リリーフ弁５２は、切換弁５２ａが図示の
切換位置にあるとき、ロジック弁５２ｂを圧力設定用リ
リーフ弁５２ｃの設定圧力で制御し、切換弁５２ａが図
示とは逆のｂ側に切換えられるとロジック弁５２ｂをブ
ロックするようになっている。また、後室３５ａは、第
２切換弁５１がｂ側へ切換えられると、第２減圧弁５４
を介して油圧源５５に接続されるようになっている。The rear chamber 35a of the injection drive cylinder 35 is connected to the tank 53 via the electromagnetic relief valve 52 when the second switching valve 51 is in the neutral position and the switching position on the side a in the figure. The electromagnetic relief valve 52 controls the logic valve 52b by the set pressure of the pressure setting relief valve 52c when the switching valve 52a is in the switching position shown in the drawing, and when the switching valve 52a is switched to the b side opposite to that shown in the drawing. The logic valve 52b is blocked. Further, in the rear chamber 35a, when the second switching valve 51 is switched to the b side, the second pressure reducing valve 54
It is adapted to be connected to the hydraulic pressure source 55 via.
【００１７】前室３５ｂは、第２切換弁５１がａ側の切
換位置にあるとき、射出プランジャ３２の後退速度制御
操作部としての電磁比例流量調整弁５６と前記第２減圧
弁５４とを介して油圧源５５に接続されるようになって
いる。In the front chamber 35b, when the second switching valve 51 is in the switching position on the a side, the electromagnetic proportional flow rate adjusting valve 56 as the backward speed control operation portion of the injection plunger 32 and the second pressure reducing valve 54 are interposed. Is connected to the hydraulic power source 55.
【００１８】アキュームレータ装置２０には、プランジ
ャ２２の後退限位置と前進限位置をそれぞれ検知する検
知器６１，６２と、プランジャ２２の先端部２２ａが三
方切換弁２７から抜け出た位置にあることを検知する検
知器６３とが設けられている。射出装置３０には、射出
プランジャ３２の計量位置を検知する検知器６４が設け
られている。The accumulator device 20 detects the detectors 61 and 62 for detecting the backward limit position and the forward limit position of the plunger 22, respectively, and detects that the tip end portion 22a of the plunger 22 is at the position where the tip end 22a is pulled out from the three-way switching valve 27. And a detector 63 that operates. The injection device 30 is provided with a detector 64 for detecting the measurement position of the injection plunger 32.
【００１９】６５はコントローラであり、各部の制御を
行うと共に指令に従って三方切換弁２７を図１，図３，
図４に示すように切換え、さらに各運転モードに従って
設定器６６に設定されている流量又は圧力となるように
電磁比例流量調整弁４２，５６と電磁比例圧力調整弁４
３を制御するようになっている。Reference numeral 65 denotes a controller, which controls each part and operates the three-way switching valve 27 in accordance with a command.
The switching is performed as shown in FIG. 4, and the electromagnetic proportional flow rate adjusting valves 42 and 56 and the electromagnetic proportional pressure adjusting valve 4 are controlled so that the flow rate or the pressure set in the setter 66 is set according to each operation mode.
3 is controlled.
【００２０】次いで本装置の作用について説明する。ま
ず、計量時に於いては、図１の連続可塑化装置１０から
の可塑化樹脂とアキュームレータ装置２０から押出され
る可塑化樹脂を三方切換弁２７で合流させ、計量室３３
へ送り込み計量を開始する。計量途中でアキュームレー
タ装置２０のプランジャ２２が前進限に達すると、図２
に示すように先端部２２ａが前記三方切換弁２７の合流
部まで入り込み、連続可塑化装置１０からの可塑化樹脂
を滞留させることなく、円滑に計量室３３に送りこみ計
量する。Next, the operation of this device will be described. First, at the time of measuring, the plasticizing resin from the continuous plasticizing device 10 and the plasticizing resin extruded from the accumulator device 20 of FIG.
Send to and start weighing. When the plunger 22 of the accumulator device 20 reaches the forward limit during the measurement,
As shown in (3), the tip end 22a enters the confluence of the three-way switching valve 27, and the plasticized resin from the continuous plasticizer 10 is smoothly fed into the measuring chamber 33 for measurement without being retained.
【００２１】射出時に於いては、図１の前記プランジャ
２２の先端部２２ａを三方切換弁２７の回転部から外れ
た位置まで後退させ、その位置を検知器６３で検出した
後、図３に示すように三方切換弁２７を切換え、射出シ
リンダ３１からの射出圧をアキュームレータ装置２０及
び連続可塑化装置１０に作用させないようにすると共
に、連続可塑化装置１０からの可塑化樹脂を三方切換弁
２７を通してアキュームレータ室２３へ送り込み蓄積す
る。この状態で射出プランジャ３２を前進させて射出を
行う。At the time of injection, the tip end portion 22a of the plunger 22 of FIG. 1 is retracted to a position separated from the rotating portion of the three-way switching valve 27, and the position is detected by the detector 63, and then shown in FIG. Thus, the three-way switching valve 27 is switched so that the injection pressure from the injection cylinder 31 is prevented from acting on the accumulator device 20 and the continuous plasticizing device 10, and the plasticized resin from the continuous plasticizing device 10 is passed through the three-way switching valve 27. It is sent to and accumulated in the accumulator chamber 23. In this state, the injection plunger 32 is advanced to perform injection.
【００２２】樹脂替え・色替え時に於いては、まずアキ
ュームレータ装置２０のプランジャ２２と射出プランジ
ャ３２とをそれぞれ前進限の状態にしてノズル３８から
可塑化樹脂を押出した後、射出プランジャ３２を前進限
位置に固定し、三方切換弁２７を図３に示すように切換
えて連続可塑化装置１０からの可塑化樹脂をアキューム
レータ装置２０へ所定量蓄積し、その後、好ましくは、
第２フィーダ１７を停止、次いで第１フィーダ１５を停
止し、連続可塑化装置１０を減速、または停止させると
共に三方切換弁２７を図４に示すように切換えて、連続
可塑化装置１０の流出路１９を閉鎖し、電磁比例流量調
整弁４２を高速に切換えて、プランジャ２２を高速で下
降させ、アキュームレータ装置２０へ蓄積した可塑化樹
脂を高速高圧で三方切換弁２７及び射出シリンダ３１及
びノズル３８を通過させてパージする。At the time of resin change / color change, first, the plunger 22 and the injection plunger 32 of the accumulator device 20 are set to the forward limit state, the plasticized resin is extruded from the nozzle 38, and then the injection plunger 32 is moved to the forward limit. The position is fixed, and the three-way switching valve 27 is switched as shown in FIG. 3 to accumulate a predetermined amount of the plasticizing resin from the continuous plasticizing device 10 in the accumulator device 20, and then, preferably,
The second feeder 17 is stopped, then the first feeder 15 is stopped to decelerate or stop the continuous plasticizer 10, and the three-way switching valve 27 is switched as shown in FIG. 19, the electromagnetic proportional flow rate adjusting valve 42 is switched to high speed, the plunger 22 is lowered at high speed, and the plasticized resin accumulated in the accumulator device 20 is transferred to the three-way switching valve 27, the injection cylinder 31 and the nozzle 38 at high speed and high pressure. Pass and purge.
【００２３】このプランジャ２２による可塑化樹脂のパ
ージによりアキュームレータ室２３内の可塑化樹脂はほ
ぼ完全に排出され、また、このパージは連続可塑化装置
１０に全く悪影響を及ぼすことなく行うことができるた
め、もっぱらパージに適した速度で行うことができる。
そこで、流路２８以降の各樹脂路中の可塑化樹脂をより
確実にパージすることができると共に、このパージに要
する時間を短かくできる。このため、前述したように、
第１，第２フィーダ１５，１７を含む連続可塑化装置１
０を減速又は停止させることなく、上記パージを行うこ
とも可能である。Purging of the plasticizing resin by the plunger 22 causes the plasticizing resin in the accumulator chamber 23 to be almost completely discharged, and the purging can be performed without any adverse effect on the continuous plasticizing apparatus 10. , Exclusively at a rate suitable for purging.
Therefore, the plasticized resin in each resin passage after the passage 28 can be more surely purged, and the time required for this purging can be shortened. Therefore, as mentioned above,
Continuous plasticizer 1 including first and second feeders 15 and 17
It is also possible to perform the above purge without decelerating or stopping 0.
【００２４】上記パージの後、三方切換弁２７を図１又
は図３の状態に切換えて再びアキュームレータ室２３に
可塑化樹脂を貯え、以下、同様に数回のパージを行うこ
とにより、アキュームレータ室２３、流路２８、計量室
３３ないしノズル３８までの各部分の可塑化樹脂は完全
に新たな樹脂に置き換えられる。After the above-mentioned purging, the three-way switching valve 27 is switched to the state shown in FIG. 1 or 3, the plasticizing resin is stored in the accumulator chamber 23 again, and the purging is repeated several times in the same manner. , The flow path 28, the measuring chamber 33 to the nozzle 38, the plasticizing resin in each part is completely replaced with a new resin.
【００２５】前述した実施例は、連続可塑化装置１０，
アキュームレータ装置２０及び射出装置３０の連通、し
ゃ断を三方切換弁２７によって切換えるようにした例を
示したが、これに限らず、流出路１９と流路２８にそれ
ぞれ開閉弁を設けて同様の連通、しゃ断を行うようにし
てもよい。In the above-described embodiment, the continuous plasticizing device 10,
An example has been shown in which communication and cutoff of the accumulator device 20 and the injection device 30 are switched by the three-way switching valve 27, but the invention is not limited to this, and open / close valves are respectively provided in the outflow passage 19 and the flow passage 28 to perform similar communication, You may make it cut off.
【００２６】[0026]
【発明の効果】以上述べたように本発明によれば、連続
可塑化装置と射出装置とのバッファとして、アキューム
レータ装置を設けた装置において、連続可塑化装置部の
樹脂圧力を過大に増加させることなく、樹脂替え・色替
えを極めて効果的に行うことができる効果が得られる。As described above, according to the present invention, in a device provided with an accumulator device as a buffer between the continuous plasticizing device and the injection device, the resin pressure in the continuous plasticizing device part is excessively increased. Therefore, it is possible to obtain the effect that the resin change and the color change can be performed extremely effectively.
【図１】本発明の実施例を示す概要構成図。FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.
【図２】アキュームレータ装置のプランジャと三方切換
弁との係合状態を示す部分拡大図。FIG. 2 is a partially enlarged view showing an engaged state of a plunger and a three-way switching valve of an accumulator device.
【図３】射出時における三方切換弁の切換状態を示す部
分拡大図。FIG. 3 is a partially enlarged view showing a switching state of a three-way switching valve at the time of injection.
【図４】樹脂替え・色替え時における三方切換弁の切換
状態を示す部分拡大図。FIG. 4 is a partially enlarged view showing a switching state of a three-way switching valve when changing resin and changing colors.
１０ 連続可塑化装置 １５ 第１フィーダ １７ 第２フィーダ １９ 流出路 ２０ アキュームレータ装置 ２２ プランジャ ２２ａ 先端部 ２３ アキュームレータ室 ２７ 三方切換弁 ２８ 流路 ３０ 射出装置 ３３ 計量室 ３７ 開閉弁 ３８ ノズル ４２ 電磁比例流量調整弁 ４３ 電磁比例圧力調整弁 ５２ 電磁リリーフ弁 ５６ 電磁比例流量調整弁 ６１〜６４ 検知器 ６５ コントローラ ６６ 設定器 10 Continuous Plasticizer 15 First Feeder 17 Second Feeder 19 Outflow Path 20 Accumulator Device 22 Plunger 22a Tip 23 Accumulator Chamber 27 Three-way Switching Valve 28 Flow Path 30 Injection Device 33 Metering Chamber 37 On-off Valve 38 Nozzle 42 Electromagnetic Proportional Flow Rate Adjustment Valve 43 Electromagnetic proportional pressure adjusting valve 52 Electromagnetic relief valve 56 Electromagnetic proportional flow rate adjusting valve 61 to 64 Detector 65 Controller 66 Setting device
Claims (3)
部を前記連続可塑化装置の流出路に接続された可塑化樹
脂のアキュームレータ装置と、同じく先端部を前記流出
路に接続された射出装置と、前記流出路中に設けられ、
計量時においては連続可塑化装置をアキュームレータ装
置及び射出装置にそれぞれ連通させ、射出時においては
射出装置側を閉鎖して連続可塑化装置とアキュームレー
タ装置とを連通させ、さらに、樹脂替え・色替え時にお
いては連続可塑化装置側を閉鎖してアキュームレータ装
置と射出装置とを連通させるように構成された弁装置と
からなることを特徴とする連続可塑化式射出成形装置。1. A continuous plasticizer for synthetic resin material, an accumulator device for plasticized resin whose tip is connected to an outflow passage of the continuous plasticizer, and injection in which a tip is also connected to the outflow passage. A device, provided in the outflow passage,
At the time of weighing, the continuous plasticizing device is connected to the accumulator device and the injection device respectively, and at the time of injection, the injection device side is closed so that the continuous plasticizing device and the accumulator device are connected to each other. In the above, there is provided a continuous plasticizing type injection molding apparatus comprising a valve device configured to close the continuous plasticizing device side so that the accumulator device and the injection device communicate with each other.
する請求項１記載の連続可塑化式射出成形装置。2. The continuous plasticizing type injection molding apparatus according to claim 1, wherein the valve device is a three-way switching valve.
出限位置にあるとき、このプランジャの先端部が三方切
換弁の合流部まで入り込むように形成されていることを
特徴とする請求項２記載の連続可塑化式射出成形装置。3. The continuous plasticizing according to claim 2, wherein when the plunger of the accumulator device is in the push-out limit position, the tip of the plunger is formed so as to enter the confluence portion of the three-way switching valve. Injection molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20098493A JP3256914B2 (en) | 1993-07-21 | 1993-07-21 | Continuous plasticization type injection molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20098493A JP3256914B2 (en) | 1993-07-21 | 1993-07-21 | Continuous plasticization type injection molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0732431A true JPH0732431A (en) | 1995-02-03 |
| JP3256914B2 JP3256914B2 (en) | 2002-02-18 |
Family
ID=16433579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20098493A Expired - Fee Related JP3256914B2 (en) | 1993-07-21 | 1993-07-21 | Continuous plasticization type injection molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3256914B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016606A1 (en) * | 1997-09-30 | 1999-04-08 | Asahi Glass Company Ltd. | Method of molding resin member and method of manufacturing resin member-carrying plate material using the same |
| JPH11156902A (en) * | 1997-12-01 | 1999-06-15 | Niigata Eng Co Ltd | Injection molding machine and injection molding method |
| JP2003522049A (en) * | 2000-02-14 | 2003-07-22 | ロモルド コーポレーション エヌヴィー | Molding of moldable materials |
| JP2008516792A (en) * | 2004-10-15 | 2008-05-22 | ハスキー インジェクション モールディング システムズ リミテッド | Three-way shut-off valve and method for injection molding |
| LU91461B1 (en) * | 2007-09-19 | 2009-11-16 | Krauss Maffei Tech Gmbh | Compounder injection molding machine |
| JP2017148956A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本製鋼所 | Flow path switching device for plasticizing injection device |
| JP2017148952A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本製鋼所 | Plunger type injection device having valve block provided at top of device |
| WO2017145680A1 (en) * | 2016-02-22 | 2017-08-31 | 株式会社 日本製鋼所 | Injection device provided with flow path switching block |
| DE102022106909A1 (en) | 2022-03-23 | 2023-09-28 | Thermoplay S.P.A. | PORTIONING UNIT |
-
1993
- 1993-07-21 JP JP20098493A patent/JP3256914B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016606A1 (en) * | 1997-09-30 | 1999-04-08 | Asahi Glass Company Ltd. | Method of molding resin member and method of manufacturing resin member-carrying plate material using the same |
| JPH11156902A (en) * | 1997-12-01 | 1999-06-15 | Niigata Eng Co Ltd | Injection molding machine and injection molding method |
| JP2003522049A (en) * | 2000-02-14 | 2003-07-22 | ロモルド コーポレーション エヌヴィー | Molding of moldable materials |
| JP2008516792A (en) * | 2004-10-15 | 2008-05-22 | ハスキー インジェクション モールディング システムズ リミテッド | Three-way shut-off valve and method for injection molding |
| EP1802436A4 (en) * | 2004-10-15 | 2009-01-07 | Husky Injection Molding | THREE-WAY INJECTION MOLDING VALVE AND METHOD |
| LU91461B1 (en) * | 2007-09-19 | 2009-11-16 | Krauss Maffei Tech Gmbh | Compounder injection molding machine |
| JP2017148956A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本製鋼所 | Flow path switching device for plasticizing injection device |
| JP2017148952A (en) * | 2016-02-22 | 2017-08-31 | 株式会社日本製鋼所 | Plunger type injection device having valve block provided at top of device |
| WO2017145680A1 (en) * | 2016-02-22 | 2017-08-31 | 株式会社 日本製鋼所 | Injection device provided with flow path switching block |
| US10850438B2 (en) | 2016-02-22 | 2020-12-01 | The Japan Steel Works, Ltd. | Injection device provided with flow path switching block |
| EP3421217B1 (en) * | 2016-02-22 | 2023-07-26 | The Japan Steel Works, Ltd. | Injection device provided with flow path switching block |
| DE102022106909A1 (en) | 2022-03-23 | 2023-09-28 | Thermoplay S.P.A. | PORTIONING UNIT |
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|---|---|
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