JPS62225318A - Injection molder - Google Patents
Injection molderInfo
- Publication number
- JPS62225318A JPS62225318A JP61067054A JP6705486A JPS62225318A JP S62225318 A JPS62225318 A JP S62225318A JP 61067054 A JP61067054 A JP 61067054A JP 6705486 A JP6705486 A JP 6705486A JP S62225318 A JPS62225318 A JP S62225318A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- speed
- nozzle
- molten resin
- flow
- 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
- 238000002347 injection Methods 0.000 title abstract description 19
- 239000007924 injection Substances 0.000 title abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 16
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、溶融樹脂を金型のキャビティ内に充填する射
出成形機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an injection molding machine for filling a mold cavity with molten resin.
従来の技術
特公昭５７−５９０６０号公報に示すように、回転駆動
されるスクリューを射出シリンダで往復動自在として溶
融樹脂をノズルより射出することで金型のキャビティ内
に充填する射出成形機が知られている。As shown in Japanese Patent Publication No. 57-59060, an injection molding machine is known in which a rotatably driven screw is reciprocated by an injection cylinder and molten resin is injected from a nozzle to fill the cavity of a mold. It is being
発明が解決しようとする問題点
かかる射出成形機においては溶融樹脂を金型のキャビテ
ィ内に充填する速度をスクリューの位置に応じて制御す
る必要がある。Problems to be Solved by the Invention In such an injection molding machine, it is necessary to control the speed at which molten resin is filled into the cavity of the mold according to the position of the screw.
前述した従来の射出成形機における充填速度はスクリュ
ーの移動速度、つまり射出シリンダの伸長速度によって
決定されるので、前述のように充填速度を制御するには
スクリューの位置に応じて射出シリンダに供給する油量
を制御して伸長速度を変化させることで行なうしかない
。The filling speed in the conventional injection molding machine mentioned above is determined by the moving speed of the screw, that is, the extension speed of the injection cylinder, so in order to control the filling speed as mentioned above, it is necessary to feed the injection cylinder according to the position of the screw. The only way to do this is to control the amount of oil and change the elongation speed.
しかしながら、射出シリンダーの伸長速度が変化してか
らノズルを通りキャビティ内に流れる溶融樹脂の速度と
流量が変化するまでには若干の時間遅れがあるので、射
出速度をスクリュー位置に応じて高速、高精度で制御す
ることはできない。However, since there is a slight time delay between the change in the elongation speed of the injection cylinder and the change in the speed and flow rate of the molten resin flowing through the nozzle into the cavity, the injection speed can be changed to high or high depending on the screw position. It cannot be controlled with precision.
問題点を解決するための手段及び作用
スクリューとノズルの中間に流量制御機構を設けて、ス
クリューよりノズルに流れる溶融樹脂の流れを制御して
ノズルより射出される溶融樹脂の流量、速度を制御でき
るようにしたものである。Means and operation for solving the problem A flow rate control mechanism is provided between the screw and the nozzle to control the flow of the molten resin flowing from the screw to the nozzle, thereby controlling the flow rate and speed of the molten resin injected from the nozzle. This is how it was done.
災施例
ハウジング１の中間部孔１α内にはスクリュー２が摺動
及び回転自在に挿入され、そのスクリュー２の先端部２
αは円錐形状となっていると共に、後端部２６は大径と
なってホッパ３内の溶融樹脂が後端側に洩れないように
しであると共に、スプライン軸４が連結され、このスプ
ライン軸４はスラスト軸受５を介して射出シリンダ６の
ピストン杆７に連結していると共に、スプライン軸４に
は図示しない回転駆動源に連結したギヤ８がスプライン
嵌合している。A screw 2 is slidably and rotatably inserted into the intermediate hole 1α of the disaster example housing 1, and the tip 2 of the screw 2
α has a conical shape, and the rear end portion 26 has a large diameter to prevent the molten resin in the hopper 3 from leaking to the rear end side.The spline shaft 4 is connected to the spline shaft 4. is connected to a piston rod 7 of an injection cylinder 6 via a thrust bearing 5, and a gear 8 connected to a rotational drive source (not shown) is spline-fitted to the spline shaft 4.
前記ピストン杆７にはラック杆８が連結され、このラッ
ク杆８に噛合するピニオン９が回転センサ１０に連結さ
れてスクリュー２の位置を検出する機構を構成している
と共に、前記中間部孔１αは流量制御機構１１を介して
ノズル１２に連結し、ノズル１２が金型１３のキャビテ
ィ１４に連通ずるようにしである。A rack rod 8 is connected to the piston rod 7, and a pinion 9 meshing with the rack rod 8 is connected to a rotation sensor 10 to constitute a mechanism for detecting the position of the screw 2. is connected to a nozzle 12 via a flow rate control mechanism 11, so that the nozzle 12 communicates with a cavity 14 of a mold 13.
前記流量制御機構１１は中間部孔１αとノズル１２とを
連通する細孔１５を比例ソレノイド１６で出入りするス
プール１７で絞るようにしたものである。The flow rate control mechanism 11 is configured such that a spool 17 that goes in and out of a proportional solenoid 16 narrows a fine hole 15 that communicates between the intermediate hole 1α and the nozzle 12.
つまり、ハウジング１の先端部１ｂには中間部孔１＠と
ノズル１２とを連通ずる長さの異なる第１、第２細孔１
５ｚ、１５ｔ が形成されていると共に、この第１、
第２細孔１５＋、１５ｔ と直焚する孔１８が形成さ
れ、この孔１８内には第１、第２スプール１７１，１７
２ が嵌挿されたスリーブ１９が嵌合してあり、この
スリーブ１９の両端部に第１、第２比例ンレノイド１６
ｓ、１６ｔ が設けられ、入力電流に応じ次ストロー
クだけ第１、第２スプール１７＋−１７２が摺動するよ
うに構成しであると共に、スリーブ１９には第１、第２
細孔１５＋−１５ｔ を連通する第１、第２孔２０１
゜２０ｙが形成され、かつ第１、第２スプール１７１゜
１７２には第１、第２括れ部２１．．２１． が形成
されて第１、第２細孔１５１−１５ｔ の開口面積を増
減して絞るようにしである。That is, the tip 1b of the housing 1 has first and second pores 1 of different lengths that communicate the intermediate hole 1@ and the nozzle 12.
5z, 15t are formed, and this first,
A hole 18 for direct firing is formed with the second pores 15+, 15t, and inside this hole 18 are the first and second spools 171, 17.
A sleeve 19 is fitted into the sleeve 19, into which the first and second proportional renoids 16 are fitted.
s, 16t are provided, and the first and second spools 17+-172 are configured to slide by the next stroke according to the input current, and the sleeve 19 is provided with first and second spools 17+-172.
First and second holes 201 communicating the pores 15+-15t
20y are formed, and the first and second spools 171 and 172 have first and second constricted portions 21. ．． 21. is formed so that the opening area of the first and second pores 151-15t is increased or decreased to narrow it down.
このようであるから、射出シリンダ６の伸長速度、つま
り伸長ｇ ６ｃｔに供給する油量を一定としてスクリュ
ー２の移動速度を一定としても、第１、第２比例ソレノ
イド＋６．．１６． に供給する電流値を変更して第
１、第２細孔１５１，１５．の絞りを変更すればノズル
１２に送られる溶融樹脂の速度と流ｉを変更できる。Because of this, even if the amount of oil supplied to the extension speed of the injection cylinder 6, that is, the extension g 6ct, is constant and the moving speed of the screw 2 is constant, the first and second proportional solenoids +6. ．． 16. By changing the current value supplied to the first and second pores 151, 15. By changing the aperture, the speed and flow i of the molten resin sent to the nozzle 12 can be changed.
したがって、前記の回転センサ１０の検出信号によって
スクリュー２の位置を検出し、その位置に応じて図示し
ないコントローラによって第１、第２比例ンレノイド１
６ｔ−１６ｔ に供給する電流値を制御することで射
出速度を制御できると共に、第１、第２細孔１５．、＋
５． の絞りを変更してからノズル１２を通過する溶
融樹脂の速度と流量が変化するまでには極く僅かな、実
際には無視できる程度の時間遅れしかないので射出速度
を高精度、高速度で制御できる。Therefore, the position of the screw 2 is detected based on the detection signal of the rotation sensor 10, and the controller (not shown) controls the first and second proportional renoids according to the detected position.
By controlling the current value supplied to the first and second pores 15.6t-16t, the injection speed can be controlled. , +
5. Since there is an extremely small, in fact negligible, time delay between changing the aperture of the nozzle and the change in the speed and flow rate of the molten resin passing through the nozzle 12, the injection speed can be adjusted with high precision and high speed. Can be controlled.
なお、長さの異なる第１、第２細孔＋ｓｔ、＋ｓｔを設
は友のはノズル１２へ流れる溶゛融樹脂の流量、速Ｋｔ
−より精度良く制御するためであり、１本の細孔のみで
も良いことは勿論である。Note that the first and second pores +st and +st having different lengths are designed to control the flow rate and speed Kt of the molten resin flowing to the nozzle 12.
- This is for more precise control, and it goes without saying that only one pore may be sufficient.
次に溶融樹脂の充填動作を説明する。射出シリンダ６の
縮少室６ｂに圧油を供給してスクリュー２を所定の計量
位置Ｓ′とし、第１、第２ソレノイド１６＋、１６ｔ
に電流を供給して第１、第２スプール＋７１−１７２
で第１、第２細孔１５．。Next, the filling operation of the molten resin will be explained. Pressure oil is supplied to the reduction chamber 6b of the injection cylinder 6 to set the screw 2 to a predetermined metering position S', and the first and second solenoids 16+, 16t are activated.
supplying current to the first and second spools +71-172
and the first and second pores 15. .
１５！を閉塞し、この状態でギヤＳを回転してスクリュ
−２ｔ−回転すると同時に射出シリンダ６の伸長室６α
に圧油を供給して一定速度で移動して溶融樹脂を一定圧
で押して溶融樹脂を圧縮しそのクッション、つまり弾性
変位を防止する。15! In this state, the gear S is rotated to rotate the screw 2t, and at the same time the extension chamber 6α of the injection cylinder 6 is closed.
Pressure oil is supplied to the cylinder, which moves at a constant speed and presses the molten resin with a constant pressure to compress the molten resin and prevent its cushioning, that is, elastic displacement.
この圧縮終了し次スクリュー２の位ｆｉｔ Ｓｏを原点
としてコントローラにセットし、同時に第１、第２細孔
１５＋、１５１ の開口面積をＷｃ２図（α）となる
ように第１、第２比例ソレノイド＋６．、＋６．に電流
を供給する。After this compression is completed, set the screw 2 position fit So as the origin in the controller, and at the same time adjust the first and second proportional solenoids so that the opening areas of the first and second pores 15+ and 151 become as shown in Figure Wc2 (α). +6. , +6. supply current to.
スクリュー２の位置を検出してＳｌの位置となったら第
１、第２細孔１５．−１５ｔ の開口面積が第２図（
ｂ）となるように第１、第２比例ソレノイド１６＋、１
６ｔ に電流を供給し、スクリュー２がＳ、の位置と
なったら第１、第２細孔１５．、 ｌ ｓ。When the position of the screw 2 is detected and reaches the position of Sl, the first and second pores 15. -15t opening area is shown in Figure 2 (
b) The first and second proportional solenoids 16+, 1
6t, and when the screw 2 reaches the position S, the first and second pores 15. , l s.
の開口面積を第２図（α）となるように第１、第２比例
ソレノイドｌ ６＋、ｌ ６ｔに電流を供給し、ストロ
ークエンドＳ、となったら第１、第２細孔１５、。Current is supplied to the first and second proportional solenoids l 6+ and l 6t so that the opening area of the opening area becomes as shown in FIG. 2 (α), and when the stroke end S is reached, the first and second pores 15.
１５、を閉塞するようにする。15, so that it is occluded.
このような制御を行なうことによって、溶融樹脂の弾性
変形によるスクリュー２の位置と射出される溶融樹脂の
流量、速度の誤差が吸収され、より高精度で射出制御で
きる。By performing such control, errors in the position of the screw 2 and the flow rate and speed of the injected molten resin due to elastic deformation of the molten resin are absorbed, and injection can be controlled with higher precision.
なお、金型１３のキャビティＩ４内に溶融樹脂を充填終
了したら、射出シリンダ６を一定圧で伸長して保持圧を
かけるようにする。Note that after filling the cavity I4 of the mold 13 with the molten resin, the injection cylinder 6 is extended at a constant pressure to apply a holding pressure.
前記流量制御機構１１は第３図に示すように、細孔１５
の中間に回転バルブ３０を設け、この回転バルブ３０を
レバー３１を介してシリンダ３２に連結して、シリンダ
３２でレバー３１を介して回転バルブ３０を回転して細
孔１５の開口面積を増減するようにしても良い。The flow rate control mechanism 11 has a pore 15 as shown in FIG.
A rotary valve 30 is provided in the middle, and this rotary valve 30 is connected to a cylinder 32 via a lever 31, and the cylinder 32 rotates the rotary valve 30 via the lever 31 to increase or decrease the opening area of the pore 15. You can do it like this.
以上の実施例では射出速度を段階的に制御したが、これ
に限るものではなく最初が遅く中間が速く最後が遅くな
るように無段階に制御しても良い。In the above embodiments, the injection speed is controlled stepwise, but the invention is not limited to this, and it may be controlled steplessly such that the injection speed is slow at the beginning, fast in the middle, and slow at the end.
発明の効果
流量制御機構１１によってノズル１２に流れる溶融樹脂
の流量、速度を制御できるから、スクリュー２の位置を
検出してから時間遅れなくノズル１２より射出される溶
融樹脂の流量、速度を制御でき、射出速度を高速度、高
精度で制御できる。Effects of the Invention Since the flow rate control mechanism 11 can control the flow rate and speed of the molten resin flowing into the nozzle 12, the flow rate and speed of the molten resin injected from the nozzle 12 can be controlled without any time delay after detecting the position of the screw 2. , the injection speed can be controlled at high speed and with high precision.
図面は本発明の実施例を示し、第１図は全体断面図、第
２図は細孔開度とスクリュー位置との関係の図表、第３
図は他の実施例の全体断面図である。
２はスクリュー、１１は流量制御機構、Ｉ２はノズル。The drawings show an embodiment of the present invention, and FIG. 1 is an overall sectional view, FIG. 2 is a diagram showing the relationship between pore opening degree and screw position, and FIG.
The figure is an overall sectional view of another embodiment. 2 is a screw, 11 is a flow rate control mechanism, and I2 is a nozzle.
Claims (1)
１２より射出する射出成形機において、前記スクリュー
２とノズル１２との間に溶融樹脂の流れを制御する流量
制御機構１１を設けたことを特徴とする射出成形機。An injection molding machine in which molten resin is injected from a nozzle 12 by a rotating and reciprocating screw 2, characterized in that a flow rate control mechanism 11 for controlling the flow of molten resin is provided between the screw 2 and the nozzle 12. injection molding machine.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61067054A JPH07115386B2 (en) | 1986-03-27 | 1986-03-27 | Injection molding machine |
| US07/138,385 US4846651A (en) | 1986-03-27 | 1987-03-27 | Injection molding machine |
| DE8787902159T DE3783115T2 (en) | 1986-03-27 | 1987-03-27 | INJECTION MOLDING MACHINE. |
| PCT/JP1987/000193 WO1987005854A1 (en) | 1986-03-27 | 1987-03-27 | Injection molding machine |
| KR1019870701112A KR940009897B1 (en) | 1986-03-27 | 1987-03-27 | Injection molding machine |
| EP87902159A EP0262229B1 (en) | 1986-03-27 | 1987-03-27 | Injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61067054A JPH07115386B2 (en) | 1986-03-27 | 1986-03-27 | Injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62225318A true JPS62225318A (en) | 1987-10-03 |
| JPH07115386B2 JPH07115386B2 (en) | 1995-12-13 |
Family
ID=13333738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61067054A Expired - Lifetime JPH07115386B2 (en) | 1986-03-27 | 1986-03-27 | Injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115386B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63173619A (en) * | 1987-01-14 | 1988-07-18 | Komatsu Ltd | Device for controlling injection speed of injection molding machine |
| JPH01241417A (en) * | 1988-03-24 | 1989-09-26 | Komatsu Ltd | Molding device of injection compression molding machine and molding process |
| US5059364A (en) * | 1988-03-24 | 1991-10-22 | Kabushiki Kaisha Komatsu Seisakusha | Injection-compression molding machine and method of molding by using the machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042013A (en) * | 1983-08-19 | 1985-03-06 | 大同コンクリ−ト工業株式会社 | Method of coating pipe body with mortars |
| JPS60242022A (en) * | 1984-05-10 | 1985-12-02 | Mitsubishi Heavy Ind Ltd | Injection device |
| JPS6233416U (en) * | 1985-08-13 | 1987-02-27 |
-
1986
- 1986-03-27 JP JP61067054A patent/JPH07115386B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042013A (en) * | 1983-08-19 | 1985-03-06 | 大同コンクリ−ト工業株式会社 | Method of coating pipe body with mortars |
| JPS60242022A (en) * | 1984-05-10 | 1985-12-02 | Mitsubishi Heavy Ind Ltd | Injection device |
| JPS6233416U (en) * | 1985-08-13 | 1987-02-27 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63173619A (en) * | 1987-01-14 | 1988-07-18 | Komatsu Ltd | Device for controlling injection speed of injection molding machine |
| JPH0457179B2 (en) * | 1987-01-14 | 1992-09-10 | Komatsu Mfg Co Ltd | |
| JPH01241417A (en) * | 1988-03-24 | 1989-09-26 | Komatsu Ltd | Molding device of injection compression molding machine and molding process |
| WO1989009125A1 (en) * | 1988-03-24 | 1989-10-05 | Kabushiki Kaisha Komatsu Seisakusho | Molding method and molding apparatus by use of injection-compression molding machine |
| US5057255A (en) * | 1988-03-24 | 1991-10-15 | Kabushiki Kaisha Komatsu Seisakusho | Molding method and molding apparatus in an injection-compression molding machine |
| US5059364A (en) * | 1988-03-24 | 1991-10-22 | Kabushiki Kaisha Komatsu Seisakusha | Injection-compression molding machine and method of molding by using the machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07115386B2 (en) | 1995-12-13 |
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