JPH0144491B2 - - Google Patents
Info
- Publication number
- JPH0144491B2 JPH0144491B2 JP55152432A JP15243280A JPH0144491B2 JP H0144491 B2 JPH0144491 B2 JP H0144491B2 JP 55152432 A JP55152432 A JP 55152432A JP 15243280 A JP15243280 A JP 15243280A JP H0144491 B2 JPH0144491 B2 JP H0144491B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- feeder
- speed
- main screw
- amount
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 24
- 238000001746 injection moulding Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims 2
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000002950 deficient Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 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
- B29C45/76—Measuring, controlling or regulating
-
- 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
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)
Description
【発明の詳細な説明】 本発明は射出成形機のフイーダ装置に関する。[Detailed description of the invention] The present invention relates to a feeder device for an injection molding machine.
射出成形機に取付たフイーダのスクリユと主ス
クリユが連動してなく、夫々別々に無関係な回転
数を設定出来るような場合、主スクリユの回転
数、即ち、主スクリユの材料移送能力に適した材
料供給量をフイーダから供給する必要がある。主
スクリユによる材料の移送量の変動は成形品にシ
ヨートシヨツトやバリ等の不良品を発生させる原
因となる。 If the feeder screw and main screw attached to the injection molding machine are not linked, and unrelated rotation speeds can be set for each separately, select the material that is suitable for the rotation speed of the main screw, that is, the material transfer capacity of the main screw. It is necessary to supply the amount from the feeder. Fluctuations in the amount of material transferred by the main screw cause defects such as short shots and burrs to occur in molded products.
前記主スクリユの材料移送量は射出成形機の成
形条件によつても異なり、例え主スクリユとフイ
ーダスクリユが一定比率を保ちつつ変化する場合
であつても、スクリユ背圧、加熱シリンダ温度等
の変化により計量時の主スクリユ後退速度が変化
した場合には前述のような主スクリユによる材料
の移送量が変化し、材料の可塑化のバランスがく
ずれるため成形品は不良品となる。 The amount of material transferred by the main screw varies depending on the molding conditions of the injection molding machine, and even if the main screw and feeder screw change while maintaining a constant ratio, the amount of material transferred by the main screw may vary depending on changes in screw back pressure, heating cylinder temperature, etc. If the retraction speed of the main screw during measurement changes, the amount of material transferred by the main screw as described above will change, and the balance of plasticization of the material will be lost, resulting in a molded product being defective.
また、計量時ばかりでなく射出時においても、
例えば射出中の射出速度を種々変化させて成形を
行う射出成形の場合、射出速度によりスクリユ溝
内へ引込まれる材料の量が異なるため、射出工程
に次いで行われる計量工程時にスクリユ溝内の可
塑化バランスがくずれ前述のような不良な成形品
が出来る。 In addition, not only during measurement but also during injection,
For example, in the case of injection molding in which molding is performed by varying the injection speed during injection, the amount of material drawn into the screw groove differs depending on the injection speed, so the plasticity in the screw groove occurs during the metering process that follows the injection process. The chemical balance is disrupted, resulting in defective molded products as described above.
本発明は前述のような主スクリユの回転数とフ
イーダスクリユの回転数が互いに無関係に設定出
来る射出成形機において、主スクリユの前進、後
退の移動速度の違いによりフイーダから供給する
材料の量を変化させることが出来ないという欠点
を取除き、主スクリユの移動速度にバランスした
材料供給が出来るようなフイーダ装置を提供する
ことである。 The present invention is an injection molding machine in which the rotation speed of the main screw and the feeder screw can be set independently of each other as described above, and the amount of material fed from the feeder is changed by the difference in the forward and backward movement speeds of the main screw. It is an object of the present invention to provide a feeder device capable of supplying material in a manner balanced with the moving speed of a main screw by eliminating the disadvantage of being unable to do so.
次に第１図により本発明の１実施例を説明する
と、１はフイーダ２を取付た射出成形機で、主ス
クリユ３が射出シリンダ４に作用する圧油で軸方
向に進退し、図示してない駆動装置により回転す
るようになつている。前記フイーダ２には油圧モ
ータ６により回転駆動されるようにされたスクリ
ユ５が設けてあり、ホツパ７から投入された材料
を前記スクリユ５の回転により前方（図中左向）
へ移送し、供給口８から主シリンダ９内へ供給す
るようになつている。１０はラツクで前記主スク
リユ３に固着されていて、同主スクリユ３の移動
に同調して移動するものである。１１は前記ラツ
ク１０に噛合つたピニオンで、前記スクリユ３の
移動に伴い回転し、パルスを発するパルスエンコ
ーダ等が取付てある。従つて、移動速度検出器１
２が前記主スクリユ３の移動中に前記パルスエン
コーダ等の発したパルス数よりその移動速度を検
出し、電気信号として発信するようになつてい
る。１３は電磁比例流量制御弁で作用される電圧
の大小によりその回路の開度を調節し、前記油圧
モータ６の回転数を制御するものである。１４は
前記フイードスクリユ５の回転数を算出する算出
部で、前記移動速度検出器１２が検出した主スク
リユ３の移動速度ｖより計量に必要なフイーダ２
からの材料の供給量Ｑとすると下記(1)式が成立
ち、
Ｑ＝γ×ｖ (1)
(1)式中γはスクリユ径によつて決定する係数で、
主シリンダ内径DB、スクリユ谷径DS、材料の比
重をωとすると、射出時はγ＝π／４（D2 B−D2 S）・
ωとなり、計量時はγ＝π／４D2 B・ωとなる。 Next, one embodiment of the present invention will be described with reference to FIG. 1. 1 is an injection molding machine equipped with a feeder 2, in which a main screw 3 is moved back and forth in the axial direction by pressure oil acting on an injection cylinder 4. It is designed to be rotated by a drive device that does not have a drive mechanism. The feeder 2 is provided with a screw 5 that is rotationally driven by a hydraulic motor 6, and the material fed from the hopper 7 is rotated forward (towards the left in the figure) by the rotation of the screw 5.
and is supplied into the main cylinder 9 from the supply port 8. 10 is fixed to the main screw 3 with a rack, and moves in synchronization with the movement of the main screw 3. Reference numeral 11 denotes a pinion meshed with the rack 10, which rotates with the movement of the screw 3 and has a pulse encoder and the like attached thereto for emitting pulses. Therefore, the moving speed detector 1
2 detects the speed of movement of the main screw 3 from the number of pulses emitted by the pulse encoder or the like while the main screw 3 is moving, and transmits it as an electrical signal. Reference numeral 13 controls the rotation speed of the hydraulic motor 6 by adjusting the degree of opening of the circuit depending on the magnitude of the voltage applied by the electromagnetic proportional flow control valve. 14 is a calculation unit that calculates the rotation speed of the feed screw 5, which calculates the feeder 2 necessary for weighing based on the moving speed v of the main screw 3 detected by the moving speed detector 12.
When the amount of material supplied from
If the main cylinder inner diameter D B , screw valley diameter D S , and material specific gravity are ω, then γ = π/4 (D 2 B − D 2 S )・ω during injection, and γ = π/4 D 2 during metering. It becomes B・ω.
一方、フイーダ側から考えると、フイードスク
リユ５の回転数Ｎ、材料のグレードにより算出さ
れ、外部より設定する係数をα、供給量を制限す
るための係数をβとすると下記(2)式が成立つ
Ｑ＝αN＋β (2)
たゞし、フイードスクリユ外径dB、フイードス
クリユ谷径dS、充満率、スクリユピツチａ、材
料のみかけ密度θとすると、Ｑ＝60××π／４
（d2 B−d2 S）×ａ×Ｎ×Ｑ＝60×πa／４（d2 B−d2 S）
・θ×Ｎより、α＝60×πa／４（d2 B−d2 S）・
θとなる。 On the other hand, from the feeder side, it is calculated based on the rotational speed N of the feed screw 5 and the grade of the material, and if α is the coefficient set from the outside and β is the coefficient for limiting the supply amount, the following equation (2) holds true. Q = αN + β (2) Assuming that the feed screw outer diameter d B , the feed screw valley diameter d S , the filling rate, the screw pitch a, and the apparent density of the material θ, Q = 60××π/4 (d 2 B − d 2 S )×a×N×Q=60×πa/4(d 2 B −d 2 S )・θ×N, α=60×πa/4(d 2 B −d 2 S )・θ .
またβは材料の供給量を制限するための係数
で、理論上はβ＝０となるものであるが、前記係
数αが供給材料のグレードにより、みかけ密度
θ、充満率が異なり、β＝０でフイーダの運転
を行うと、材料の供給は多過ぎたり、不足したり
する場合が多く、実際の運転に当つては、経験上
から得られる係数βを用いて補正する。 Also, β is a coefficient for limiting the amount of material supplied, and theoretically β = 0. However, the coefficient α differs depending on the grade of the supplied material, the apparent density θ, and the filling rate, so β = 0. When the feeder is operated in this manner, the amount of material supplied is often too large or insufficient, and in actual operation, correction is made using the coefficient β obtained from experience.
依つて、上記(1)、(2)式より、フイーダスクリユ
の回転数Ｎが算出される。この算出値を電気信号
として信号設定器１５に設定し、同設定値を種々
変更することにより、前記電磁比例流量制御弁１
３に作用する電気信号を変化させ、油圧モータ６
の回転数を制御するものである。１６は供給材料
のグレードにより異なる係数αを外部より設定す
る設定装置である。１７は供給量を制限するため
に用いる係数βを設定する係数設定装置である。 Therefore, the rotation speed N of the feeder screw is calculated from the above equations (1) and (2). By setting this calculated value as an electric signal in the signal setting device 15 and changing the set value variously, the electromagnetic proportional flow control valve 1
3 to change the electric signal acting on the hydraulic motor 6.
The rotation speed of the motor is controlled. Reference numeral 16 denotes a setting device for externally setting a coefficient α that varies depending on the grade of the supplied material. Reference numeral 17 denotes a coefficient setting device for setting a coefficient β used to limit the supply amount.
以上のように構成されているので、主スクリユ
３の移動速度に適したフイードスクリユの回転
数、即ち材料供給が出来、当初に掲げたような欠
点が取除かれる。 With the above structure, the feed screw can be rotated at a rotational speed suitable for the moving speed of the main screw 3, that is, the material can be fed, and the drawback mentioned above can be eliminated.
第１図は本発明による１実施例を示す図。
３……主スクリユ、５……フイードスクリユ、
６……油圧モータ、１２……主スクリユ移動速度
検出器、１３……電磁比例流量制御弁、１４……
フイードスクリユ回転数算出部。
FIG. 1 is a diagram showing one embodiment according to the present invention. 3...Lord Skrill, 5...Feed Skrill,
6... Hydraulic motor, 12... Main screw movement speed detector, 13... Electromagnetic proportional flow control valve, 14...
Feed screw rotation speed calculation unit.
Claims (1)
いに無関係に設定する射出成形機の油圧モータ駆
動によるフイーダ装置において、 主スクリユの前進、後退時の移動速度ｖを検出
する速度検出装置と、 前記速度検出装置の検出した速度ｖに基く主ス
クリユによる材料移送量Ｑ＝γv（たゞし、γはス
クリユ径により決定する係数）と、フイーダスク
リユの材料移送量Ｑ＝αN＋β（たゞし、αは材料
のグレードによつて決定する係数、βは供給量を
制限する係数）とによりフイーダスクリユの回転
数Ｎを算出する算出部と、 前記算出部が算出したフイーダスクリユの回転
数Ｎを電気信号にとして設定する信号設定器と、 前記信号設定器からの電気信号により作動し、
主スクリユの移動速度に応じて材料を供給するよ
うにフイーダスクリユ駆動用の油圧モータの制御
を行う電磁流量制御弁とから成る射出成形機用フ
イーダ装置。[Claims] 1. A feeder device driven by a hydraulic motor of an injection molding machine in which the rotation speeds of the main screw and the feeder screw are set independently of each other, and a speed detection device that detects the moving speed v of the main screw when moving forward and backward. , the amount of material transferred by the main screw based on the speed v detected by the speed detection device Q = γv (where γ is a coefficient determined by the screw diameter), and the amount of material transferred by the feeder screw Q = αN + β (where, γ is a coefficient determined by the screw diameter). a calculation unit that calculates the rotation speed N of the feeder screw by α is a coefficient determined by the grade of the material, and β is a coefficient that limits the supply amount; a signal setting device configured to set the signal as a signal setting device;
A feeder device for an injection molding machine comprising an electromagnetic flow control valve that controls a hydraulic motor for driving a feeder screw so as to feed material according to the moving speed of the main screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15243280A JPS5775834A (en) | 1980-10-30 | 1980-10-30 | Feeder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15243280A JPS5775834A (en) | 1980-10-30 | 1980-10-30 | Feeder device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5775834A JPS5775834A (en) | 1982-05-12 |
| JPH0144491B2 true JPH0144491B2 (en) | 1989-09-28 |
Family
ID=15540395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15243280A Granted JPS5775834A (en) | 1980-10-30 | 1980-10-30 | Feeder device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5775834A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829428U (en) * | 1981-08-24 | 1983-02-25 | 宇部興産株式会社 | Vented plasticization molding equipment |
| JPS62132624A (en) * | 1985-12-05 | 1987-06-15 | Toshiba Mach Co Ltd | Raw material supply device of injection molding machine |
| CN111361093B (en) * | 2020-04-09 | 2021-12-24 | 嘉兴市维尔塑业有限公司 | Movable feeding mechanism for injection molding machine and working method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124061A (en) * | 1976-04-12 | 1977-10-18 | Sumitomo Heavy Industries | System for controlling injection molding machine |
| JPS5311957A (en) * | 1976-07-20 | 1978-02-02 | Meiki Seisakusho Kk | Plastic molding machine |
-
1980
- 1980-10-30 JP JP15243280A patent/JPS5775834A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124061A (en) * | 1976-04-12 | 1977-10-18 | Sumitomo Heavy Industries | System for controlling injection molding machine |
| JPS5311957A (en) * | 1976-07-20 | 1978-02-02 | Meiki Seisakusho Kk | Plastic molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5775834A (en) | 1982-05-12 |
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