JPS60219025A - Plunger-type injection molding device - Google Patents
Plunger-type injection molding deviceInfo
- Publication number
- JPS60219025A JPS60219025A JP7705684A JP7705684A JPS60219025A JP S60219025 A JPS60219025 A JP S60219025A JP 7705684 A JP7705684 A JP 7705684A JP 7705684 A JP7705684 A JP 7705684A JP S60219025 A JPS60219025 A JP S60219025A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- valve
- plunger
- hopper
- nozzle head
- 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.)
- Pending
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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- 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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/231—Needle valve systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、シリンダの内部に設けたプランジャの軸方
向の移動によってシリンダ内部の溶融樹脂をシリンダ先
端に接続したノズルヘッドのノズルから押出すようにし
たプランジャ式射出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plunger type injection device that extrudes molten resin inside a cylinder from a nozzle of a nozzle head connected to the tip of the cylinder by moving a plunger provided inside the cylinder in the axial direction. It is something.
プランジャ式射出装置のシリンダに成形材料を供給する
方法には、上記シリンダにバレルを接続し、そのバレル
にホッパを取付け、上記ホッパからバレル内部に落下し
た成形原料をバレルの内部に設けたスクリュの回転によ
り混練し、溶融した状態でシリンダの内部に流動させる
方法と、定噴の溶索樹脂を人手によってシリンダ内部に
供給する方法とが存在する。The method of supplying molding material to the cylinder of a plunger-type injection device involves connecting a barrel to the cylinder, attaching a hopper to the barrel, and discharging the molding material that has fallen from the hopper into the barrel through a screw provided inside the barrel. There are two methods: one method is to knead the resin by rotation and flow it into the cylinder in a molten state, and the other method is to manually feed a constant jet of weld resin into the cylinder.
しかし、前者の供給方法においては、高圧を要するので
装置が大型化し、しかも金型が高圧に耐え得るものでな
ければならないという不都合があり、また、後者の供給
方法においては、シリンダ内部が空になると、その都度
溶融ＦＭ ’Ｉ８を供給する必要があるため、射出作業
が不連続となり、作業叶が悪いという不都合がある。However, the former supply method requires high pressure, which increases the size of the equipment, and the mold must be able to withstand high pressure. In this case, since it is necessary to supply molten FM'I8 each time, the injection operation becomes discontinuous and there is an inconvenience that the efficiency of the operation is poor.
そこで、この考案は上記の不都合を解消し、射出作業が
連続して行なえるようにした小型のプランジャ式射出装
置を提供することを目的としている。Therefore, the object of this invention is to provide a small-sized plunger type injection device which eliminates the above-mentioned disadvantages and allows continuous injection work.
上記の目的を達成するため、この発明は、プランジャを
内部に設けたシリンダと原料ホッパの連通路およびシリ
ンダの先端に接続したノズルヘツドの樹脂流路のそれぞ
れに通路開閉用のバルブを設け、プランジャの後退時に
は、ノズルヘッドのバルブを閉じ、連通路のバルブを開
放してプランジャの移動によるシリンダ内部の圧力減少
によりホッパ内部の原料をシリンダ内部に吸引するよう
にしたものである。In order to achieve the above object, the present invention provides passage opening/closing valves in each of the communication passage between the cylinder in which the plunger is installed and the raw material hopper, and the resin flow passage in the nozzle head connected to the tip of the cylinder. When retracting, the valve of the nozzle head is closed, the valve of the communication passage is opened, and the pressure inside the cylinder is reduced by the movement of the plunger, so that the raw material inside the hopper is sucked into the cylinder.
以下、この発明の実施例を添付図面に基ついて説明する
。Embodiments of the present invention will be described below with reference to the accompanying drawings.
図示のように、押出機本体１の内部にはシリンダ２が設
けられ、そのシリンダ２の内側に摺動可能に設けたプラ
ンジャ３は押出機本体１の後端部に設けたシリンダ４の
ピストンロッド５に連結され、上記シリンダ４を作動す
ることによってプランジャ３が移動する。As shown in the figure, a cylinder 2 is provided inside the extruder main body 1, and a plunger 3 slidably provided inside the cylinder 2 is connected to a piston rod of a cylinder 4 provided at the rear end of the extruder main body 1. 5, and the plunger 3 is moved by operating the cylinder 4.
上記シリンダ２の外側には螺旋形のジャケット６が形成
され、そのジャケット６に温度調整した油等の熱媒体を
供給してシリンダ２の内部を加熱するようになっている
。A spiral jacket 6 is formed on the outside of the cylinder 2, and the inside of the cylinder 2 is heated by supplying a heat medium such as oil whose temperature is adjusted to the jacket 6.
また、押出機本体１の先端部上面には原料ホッパ７が取
付けられ、そのホツパアの出口とシリンダ２の内部は連
通路８を介して連通し、その連通路８に第１バルブ１０
が取付けられている（第２図参照）。Further, a raw material hopper 7 is attached to the upper surface of the tip of the extruder main body 1, and the outlet of the hopper and the inside of the cylinder 2 are communicated via a communication passage 8, and a first valve 10 is connected to the communication passage 8.
is installed (see Figure 2).
上記原料ホッパ７の周壁１１は二層構造となり、その内
壁１１と外壁１１との間に螺旋形のジャケット１２が形
成され、そのジャケット１２に供給する熱媒体によって
ホッパ７の内部が、す［１熱される。The peripheral wall 11 of the raw material hopper 7 has a two-layer structure, and a spiral jacket 12 is formed between the inner wall 11 and the outer wall 11, and the inside of the hopper 7 is heated by the heating medium supplied to the jacket 12. It gets heated.
このため、ホッパ７の内部に成形原料を充填してお（と
、上記原料が溶融する。Therefore, when the inside of the hopper 7 is filled with the forming raw material, the raw material melts.
なお、原料ホッパ７の内部に溶嵜原料の攪拌部材を設け
ておくようにする。Note that a stirring member for the melted material is provided inside the material hopper 7.
前記第１バルブ１０は、バルブ本体１３を備えそのバル
ブ本体１３に形成した弁孔１４に対して移動可能なニー
ドル１５をシリンダ１６によって移動させるようにしで
あるが、バルブの形式は任きである。The first valve 10 includes a valve body 13, and a movable needle 15 is moved by a cylinder 16 with respect to a valve hole 14 formed in the valve body 13, but the type of the valve is arbitrary. .
さらに、押出機本体１の先端には、筒状のミキシング筒
１７が接続され、そのミキシング筒１７の先端に筒状の
ノズルヘッド１８が接続されている。このミキシング筒
１７およびノズルヘッド１８の内側の孔は前記シリンダ
２の内側と連通し、溶融樹脂が流動する通路になってい
る。ミキシング筒１７の樹脂通路１７には溶融樹脂をそ
の流動状態において混合する混合部材（図示省略）が配
置され、一方、ノズルヘッド１８の樹脂通路１日には第
２バルブ２０が取付けられている（第３図参照）。Further, a cylindrical mixing tube 17 is connected to the tip of the extruder main body 1, and a cylindrical nozzle head 18 is connected to the tip of the mixing tube 17. The holes inside the mixing cylinder 17 and the nozzle head 18 communicate with the inside of the cylinder 2, forming a passage through which the molten resin flows. A mixing member (not shown) for mixing molten resin in a fluid state is arranged in the resin passage 17 of the mixing cylinder 17, while a second valve 20 is installed in the resin passage 1 of the nozzle head 18 ( (See Figure 3).
ここで、第２バルブ２０は、樹脂通路１８にバルブ本体
２１を組み込んで上記の通路１８を前後に仕切り、その
バルブ本体２１に前後の通路を連通させる通路２２と、
前記ノズルヘッド１８の先端のノズル１８と同一軸芯上
にニードル挿入孔２３とを形成し、そのニードル挿入孔
２３に挿入したニードル２４の先端を上記ノズル１８の
背部に位置せしめ、このニードル２４をバルブ本体２１
にピン２５で同動可能に取付けたレバー２６の一端に関
連し、そのレバー２６の他端をノズルヘッド１８に形成
した窓２７から外側に突出させてシリンダ２８のピスト
ンロッド２９に連結し、上記シリンダ２日の作動により
レバー２６を回動してニードル２４の先端でノズル１８
を開閉するようにしである。Here, the second valve 20 includes a valve body 21 incorporated in the resin passage 18 to partition the passage 18 into front and rear parts, and a passage 22 that allows the valve body 21 to communicate with the front and rear passages;
A needle insertion hole 23 is formed coaxially with the nozzle 18 at the tip of the nozzle head 18, and the tip of the needle 24 inserted into the needle insertion hole 23 is positioned at the back of the nozzle 18. Valve body 21
The other end of the lever 26 is connected to the piston rod 29 of the cylinder 28 by protruding outward from a window 27 formed in the nozzle head 18, and connected to the piston rod 29 of the cylinder 28. Due to the operation of the cylinder 2, the lever 26 is rotated and the tip of the needle 24 is connected to the nozzle 18.
It is designed to open and close.
いま、ホッパ７のジャケット１２に熱媒体を供給してホ
ッパ７を加熱し、その加熱されたホッパ７の内部に成形
１ｇ料を供給すると、この成形原料は加熱溶融する。Now, when a heating medium is supplied to the jacket 12 of the hopper 7 to heat the hopper 7, and 1 g of molding material is supplied into the heated hopper 7, this molding material is heated and melted.
このような原料の溶融状態において、第１バルブ１０を
開放し、第２バルブ２０を全閉し、それよりシリンダ４
の作動によりプランジャ３を後退（第１図の右方向に移
動させる）させると、シリンダ２の内部圧力が減少する
ため、ホラパフ内部の溶融朋脂は、連通路８からシリン
ダ２の内部に１反引される。In such a molten state of the raw material, the first valve 10 is opened, the second valve 20 is fully closed, and then the cylinder 4 is opened.
When the plunger 3 is moved backward (moved to the right in Fig. 1) by the operation of , the internal pressure of the cylinder 2 decreases, and the molten tom inside the hollow puff flows from the communication path 8 into the inside of the cylinder 2. drawn.
また、シリンダ２゛の内部に溶融樹脂が供給された状態
において、第１バルブ１０を閉し、第２バルブ２０を開
５牧し、それよりプランジャ３を前進させると、シリン
ダ２内部の溶嘲崩指がミキシング筒１７およびノズルヘ
ッド１８の内側の崩脂通以上のように、この発明によれ
ば、第１バルブを開放し、第２バルブを全閉してプラン
ジャを後退させると、ホッパの内部の溶融原料がシリン
ダの内部に供給され、また、第１バルブを全閉し、第２
バルブを開放してプランジャを前進させると、シリンダ
の内部の溶融樹脂がノズルヘッドの先端のノズルから押
出されるため、射出作業を連続して能率よく行なうこと
ができると共に、ホッパとシリンダの連通路およびシリ
ンダの先端に接続したノズルヘッドの内側の明細通路に
それぞれバルブを取付けた簡単な構成であるため、全体
を小型するとよができ、コストの安い射出装置を提供す
ることができる。In addition, when the first valve 10 is closed and the second valve 20 is opened and the plunger 3 is advanced, the molten resin inside the cylinder 2 is supplied with molten resin inside the cylinder 2. According to the present invention, when the first valve is opened, the second valve is fully closed, and the plunger is retracted, the hopper is The internal molten raw material is supplied to the inside of the cylinder, and the first valve is fully closed and the second valve is fully closed.
When the valve is opened and the plunger is moved forward, the molten resin inside the cylinder is extruded from the nozzle at the tip of the nozzle head, making it possible to perform continuous and efficient injection work, and also to improve the communication path between the hopper and cylinder. Since it has a simple structure in which valves are attached to each of the detailed passages inside the nozzle head connected to the tip of the cylinder, the entire structure can be made compact and an inexpensive injection device can be provided.
第１図は、この発明に係る射出装置の一実施例を示す一
部切欠正面図、第２図は同上のホッパとシリンダの連通
部を示す縦断側面図、第３図は同上のノズルヘッド部分
を示す断面図である。
２・・・シリンダ、３・・・プランジャ、７・・・原料
ホッパ、８・・・連通路、１０・・・第１バルブ、１８
・・・ノズルヘット、１８・・・樹脂通路、２０・・・
第２バルブ。FIG. 1 is a partially cutaway front view showing an embodiment of an injection device according to the present invention, FIG. 2 is a longitudinal sectional side view showing a communication section between the hopper and cylinder of the same, and FIG. 3 is a nozzle head portion of the same. FIG. 2... Cylinder, 3... Plunger, 7... Raw material hopper, 8... Communication path, 10... First valve, 18
...Nozzle head, 18...Resin passage, 20...
2nd valve.
Claims (1)
配置し、そのプランジャの移動によってシリンダ内部の
溶融樹脂をノズルヘッドの先端か路および前記ノズルヘ
ッドの内側の樹脂流路のそれぞれに通路開閉用のバルブ
を設けたことを特徴とするプランジャ式射出装置。A plunger is placed inside the cylinder to which the nozzle head is connected, and by the movement of the plunger, the molten resin inside the cylinder is transferred from the tip of the nozzle head to the passage and the resin flow passage inside the nozzle head. A plunger type injection device characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7705684A JPS60219025A (en) | 1984-04-13 | 1984-04-13 | Plunger-type injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7705684A JPS60219025A (en) | 1984-04-13 | 1984-04-13 | Plunger-type injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60219025A true JPS60219025A (en) | 1985-11-01 |
Family
ID=13623128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7705684A Pending JPS60219025A (en) | 1984-04-13 | 1984-04-13 | Plunger-type injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60219025A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07125025A (en) * | 1993-10-29 | 1995-05-16 | Yanagimoto Hoso Sangyo Kk | Plunger type resin injection device |
| CN111016074A (en) * | 2019-12-30 | 2020-04-17 | 蔡燕芳 | One-way current-limiting anti-blocking nozzle for injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4890361A (en) * | 1972-03-06 | 1973-11-26 | ||
| JPS5787340A (en) * | 1980-11-20 | 1982-05-31 | Toshiba Mach Co Ltd | Injection unit for injection molding machine |
-
1984
- 1984-04-13 JP JP7705684A patent/JPS60219025A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4890361A (en) * | 1972-03-06 | 1973-11-26 | ||
| JPS5787340A (en) * | 1980-11-20 | 1982-05-31 | Toshiba Mach Co Ltd | Injection unit for injection molding machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07125025A (en) * | 1993-10-29 | 1995-05-16 | Yanagimoto Hoso Sangyo Kk | Plunger type resin injection device |
| CN111016074A (en) * | 2019-12-30 | 2020-04-17 | 蔡燕芳 | One-way current-limiting anti-blocking nozzle for injection molding machine |
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