JPS63262219A - Injecting material in electromotive injection apparatus - Google Patents
Injecting material in electromotive injection apparatusInfo
- Publication number
- JPS63262219A JPS63262219A JP9668787A JP9668787A JPS63262219A JP S63262219 A JPS63262219 A JP S63262219A JP 9668787 A JP9668787 A JP 9668787A JP 9668787 A JP9668787 A JP 9668787A JP S63262219 A JPS63262219 A JP S63262219A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- injection
- electric motor
- check valve
- microcurrent
- 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 claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 abstract description 6
- 239000012768 molten material Substances 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5092—Intrusion moulding, i.e. the screw rotates during injection
-
- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
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】
［産業上の利用分野］
この発明は合成樹脂の成形に用いられる電動式射出装置
における材料射出方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a material injection method in an electric injection device used for molding synthetic resin.
［従来の技術］
一般に射出装置にはスクリュの回転を電動モーターによ
り行う電動式射出装置と、油圧モーターにより行う油圧
式射出装置とがある。電動式射出装置は射出シリンダ内
の逆止弁付きスクリュを前進移動させる油圧シリンダと
、コンバータにより制御可能なスクリュ回転用の電動モ
ーターとを備えており、電動モーターの回転を減速歯車
により減速してスクリュに伝達している。[Prior Art] In general, there are two types of injection devices: electric injection devices whose screws are rotated by an electric motor, and hydraulic injection devices whose screws are rotated by a hydraulic motor. The electric injection device is equipped with a hydraulic cylinder that moves forward a screw with a check valve inside the injection cylinder, and an electric motor for rotating the screw that can be controlled by a converter.The rotation of the electric motor is reduced by a reduction gear. It is transmitted to the screw.
また油圧式射出装置はスクリュを前進移動する油圧シリ
ンダと、スクリュを回転する油圧モーターとを備え、油
圧モーターの回転を減速することなくスクリュに伝達し
ている。Further, the hydraulic injection device includes a hydraulic cylinder that moves the screw forward and a hydraulic motor that rotates the screw, and transmits the rotation of the hydraulic motor to the screw without deceleration.
［発明が解決しようとする問題点］
上記油圧式射出装置では、材料計量後に油圧モーターの
油圧路をバルブ装置により閉鎖して、油圧モーターの回
転を停止するとともに固定し、射出時におけるスクリュ
の回転を防止することができるが、電動式射出装置の場
合には、スクリュと１！動モーターの間に減速歯車が介
在しているため、この減速歯車が多少なりとも摩耗しで
いると、射出圧によりスクリュが逆転する。この逆転は
僅かであるけれども計量材料の射出に影響を与え、射出
量のバラツキの原因となり、成形品の精密成形を困難な
ものとなす。[Problems to be Solved by the Invention] In the above-mentioned hydraulic injection device, the hydraulic path of the hydraulic motor is closed by a valve device after material measurement, and the rotation of the hydraulic motor is stopped and fixed, and the rotation of the screw during injection is stopped. However, in the case of an electric injection device, the screw and 1! Since a reduction gear is interposed between the moving motors, if this reduction gear is worn out to some extent, the screw will reverse due to the injection pressure. Although this reversal is slight, it affects the injection of the metered material, causes variations in the injection amount, and makes precision molding of the molded product difficult.
この発明は上記電動式射出装置における問題点を解決す
るために考えられたものであって、その目的は簡単な手
段によってスクリュの逆転を防止することができ、また
逆止弁の摩耗による材料の逆流をも防止することができ
る新たな材料射出方法を提供することにある。This invention was devised in order to solve the above-mentioned problems in the electric injection device, and its purpose is to prevent the screw from reversing by a simple means, and also to prevent the material from collapsing due to wear of the check valve. The object of the present invention is to provide a new material injection method that can also prevent backflow.
Ｆ問題点を解決するための手段］
上記目的によるこの発明は、射出シリンダ内の逆止弁付
きスクリュを、減速歯車を介して電動モーターにより回
転する射出装置において、材料計量後の射出時に、電動
モーターに微電流を通電し、スクリュを正方向に極微速
回転することによって、上記問題点を解決してなる。Means for Solving Problem F] This invention according to the above object is an injection device in which a screw with a check valve in an injection cylinder is rotated by an electric motor via a reduction gear. The above problem is solved by applying a small current to the motor and rotating the screw in the forward direction at a very small speed.
［作 用１
上記方法にあっては、スクリュ前進と同時に生ずるスク
リュの極微速正回転によって、スクリュ周囲の溶融材料
に圧力が発生し、その圧力によって逆止弁が閉鎖する間
の計量材料の逆流が防止される。[Function 1] In the above method, pressure is generated in the molten material around the screw due to the very slow forward rotation of the screw that occurs simultaneously with the forward movement of the screw, and this pressure causes the backflow of the material to be measured while the check valve closes. is prevented.
［実 施 例Ｊ
Ｏ成形条件 射出圧力 ８０Ｋｙｌｃｔｄ射
出時間 ５．５秒
冷却時間 ８〃
型締め圧力 １４０Ｋｇ／ｃｉ
Ｏ加熱温度 ） ズ ル
１７０度加熱筒前部 ２２０度
加熱筒中間 ２２０度
加熱筒後部 １８０度
０成形材料 ６６ナイロン
Ｏ使用金型 テスト用スパイラル金型０使用スクリユ
の状態
スクリュ部分の先端より約１／２
の長さのところまで、最大０．３Ｍ
摩耗したスクリュ
０１ｆ動モーター電流
Ｑ 〜１００Ｈ２（：ｌンバータ制ｔｉｌｌ）０スラリ
４回転 ６０〜１２０回転／分０射出時の電
動モーター電流 ０．５１１２０スクリュ正
方向回転 分速１／１０回転０空出し材料の重＠
２２．８８ ｇｒＯスパイラル成形
品の重量（スプルを含む）［発明の効果］
この発明は上述のように、材料計量後の射出時に電動モ
ーターに微電流を通電し、スクリュを正方向に極微速回
転して、計量材料の逆流を防止したことから、材料の射
出量が通常方法による場合よりも多くなり、電動式射出
装置であっても成形品質が優れた成形品を射出成形する
ことができる。[Example J O molding conditions Injection pressure 80Kylctd Injection time 5.5 seconds Cooling time 8 Mold clamping pressure 140Kg/ci O heating temperature)
170 degree heating cylinder front part 220 degree heating cylinder middle part 220 degree heating cylinder rear part 180 degrees Up to 0.3M Worn screw 01f dynamic motor current Q ~ 100H2 (:l inverter control till) 0 slurry 4 rotations 60 to 120 revolutions/min 0 electric motor current at injection 0.51120 screw forward rotation minute speed 1/10 rotation 0 weight of material @
22.88 Weight of grO spiral molded product (including sprue) [Effects of the invention] As described above, this invention applies a slight current to the electric motor during injection after measuring the material, and rotates the screw in the forward direction at an extremely slow speed. Since backflow of the metered material is prevented, the amount of material injected is larger than in the case of a normal method, and a molded product with excellent molding quality can be injection molded even with an electric injection device.
また電動モーターに微電流を通電するだけでよいので、
射出操作が複雑となるようなこともなく、従来装置にも
応用することができるなどの特徴を有する。Also, since it is only necessary to apply a small current to the electric motor,
It has the characteristics that the injection operation is not complicated and can be applied to conventional equipment.
Claims (1)
して電動モーターにより回転する射出装置において、材
料計量後の射出時に、電動モーターに微電流を通電し、
スクリュを正方向に極微速回転することを特徴とする電
動式射出装置における材料射出方法In an injection device in which a screw with a check valve inside an injection cylinder is rotated by an electric motor via a reduction gear, a small current is applied to the electric motor during injection after measuring the material.
Material injection method using an electric injection device characterized by rotating a screw in the forward direction at extremely low speed
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9668787A JPH0745155B2 (en) | 1987-04-20 | 1987-04-20 | Material injection method in electric injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9668787A JPH0745155B2 (en) | 1987-04-20 | 1987-04-20 | Material injection method in electric injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63262219A true JPS63262219A (en) | 1988-10-28 |
| JPH0745155B2 JPH0745155B2 (en) | 1995-05-17 |
Family
ID=14171704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9668787A Expired - Lifetime JPH0745155B2 (en) | 1987-04-20 | 1987-04-20 | Material injection method in electric injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745155B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213320A (en) * | 1990-01-18 | 1991-09-18 | Fanuc Ltd | Injection device for motorized injection molding machine |
| EP1207032A1 (en) * | 2000-11-15 | 2002-05-22 | Sumitomo Heavy Industries, Ltd. | Method for controlling injection molding machine capable of reducing variations in weight of molded product |
| JP2003154563A (en) * | 2001-11-26 | 2003-05-27 | Sumitomo Heavy Ind Ltd | Injection-controlling system |
| JP2008126533A (en) * | 2006-11-21 | 2008-06-05 | Nissei Plastics Ind Co | Control method of injection molding machine |
| WO2017096272A1 (en) * | 2015-12-04 | 2017-06-08 | Extrude To Fill, LLC | Method of molding a part |
| US9808971B2 (en) | 2014-12-04 | 2017-11-07 | Extrude To Fill, LLC | Nozzle shut off for injection molding system |
| US9931773B2 (en) | 2014-12-04 | 2018-04-03 | Extrude To Fill, LLC | Injection molding system and method of fabricating a component |
-
1987
- 1987-04-20 JP JP9668787A patent/JPH0745155B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213320A (en) * | 1990-01-18 | 1991-09-18 | Fanuc Ltd | Injection device for motorized injection molding machine |
| EP1207032A1 (en) * | 2000-11-15 | 2002-05-22 | Sumitomo Heavy Industries, Ltd. | Method for controlling injection molding machine capable of reducing variations in weight of molded product |
| JP2003154563A (en) * | 2001-11-26 | 2003-05-27 | Sumitomo Heavy Ind Ltd | Injection-controlling system |
| JP2008126533A (en) * | 2006-11-21 | 2008-06-05 | Nissei Plastics Ind Co | Control method of injection molding machine |
| US9808971B2 (en) | 2014-12-04 | 2017-11-07 | Extrude To Fill, LLC | Nozzle shut off for injection molding system |
| US9931773B2 (en) | 2014-12-04 | 2018-04-03 | Extrude To Fill, LLC | Injection molding system and method of fabricating a component |
| US10086550B2 (en) | 2014-12-04 | 2018-10-02 | Extrude To Fill, LLC | Molding machine and method of molding a part |
| US11292178B2 (en) | 2014-12-04 | 2022-04-05 | Extrude to Fill, Inc. | Nozzle shut off for injection molding system |
| US11945150B2 (en) | 2014-12-04 | 2024-04-02 | Extrude to Fill, Inc. | Nozzle shut off for injection molding system |
| WO2017096272A1 (en) * | 2015-12-04 | 2017-06-08 | Extrude To Fill, LLC | Method of molding a part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745155B2 (en) | 1995-05-17 |
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