AT9495U1 - INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE - Google Patents
INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE Download PDFInfo
- Publication number
- AT9495U1 AT9495U1 AT0075506U AT7552006U AT9495U1 AT 9495 U1 AT9495 U1 AT 9495U1 AT 0075506 U AT0075506 U AT 0075506U AT 7552006 U AT7552006 U AT 7552006U AT 9495 U1 AT9495 U1 AT 9495U1
- Authority
- AT
- Austria
- Prior art keywords
- screw
- pressure plate
- sleeve
- metering
- plate
- Prior art date
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
- B29C45/46—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
- B29C45/5008—Drive means therefor
-
- 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
- B29C45/5008—Drive means therefor
- B29C2045/5032—Drive means therefor using means for detecting injection or back pressures
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/76006—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/7618—Injection unit
- B29C2945/76214—Injection unit drive means
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Einspritzeinrichtung für eine Spritzgießmaschine mit einer Schnecke (3) zum Dosieren von Kunststoff, welche drehbar in einer Druckplatte (8) gelagert ist, welche mittels mindestens zwei elektrisch angetriebener Spindeln (5) längsverschiebbar ist, wobei der vom Kunststoff auf die Schnecke (3) ausgeübte Druck mittels mindestens eines Sensors (14; 15) festgestellt wird, der die Verformung eines zwischen einer feststehenden, das Drehlager (16) der Schnecke (3) umgebenden Hülse (9) und der Druckplatte (8) angeordneten Verbindungsringes misst, wobei das Gehäuse (30) des die Schnecke (3) drehenden Dosierantriebes (6) und des zugehörigen Getriebes (31) am Verbindungsring (10) zwischen der das Drehlager der Schnecke (3) umgebenden Hülse (9) und der Dosierplatte (8) befestigt ist und von diesem getragen wird.Injection device for an injection molding machine with a screw (3) for metering plastic, which is rotatably mounted in a pressure plate (8), which is longitudinally displaceable by means of at least two electrically driven spindles (5), wherein the plastic on the screw (3) exerted Pressure is detected by means of at least one sensor (14; 15) which measures the deformation of a connecting ring arranged between a stationary sleeve (9) surrounding the rotary bearing (16) of the screw (3) and the pressure plate (8), the housing ( 30) of the screw (3) rotating metering drive (6) and the associated gear (31) on the connecting ring (10) between the rotary bearing of the screw (3) surrounding the sleeve (9) and the metering plate (8) is fixed and from this will be carried.
Description
2 AT 009 495 U12 AT 009 495 U1
Die Erfindung bezieht sich auf eine Einspritzeinrichtung für eine Spritzgießmaschine mit einer Schnecke zum Dosieren von Kunststoff, welche drehbar in einer Druckplatte gelagert ist, welche mittels mindestens zwei elektrisch angetriebener Spindeln längsverschiebbar ist, wobei der vom Kunststoff auf die Schnecke ausgeübte Druck mittels mindestens eines Sensors festgestellt wird, der die Verformung eines zwischen einer feststehenden, das Drehlager der Schnecke umgebenden Hülse und der Druckplatte angeordneten Verbindungsringes misst.The invention relates to an injection device for an injection molding machine with a screw for metering plastic, which is rotatably mounted in a pressure plate, which is longitudinally displaceable by means of at least two electrically driven spindles, wherein the pressure exerted by the plastic on the screw detected by at least one sensor which measures the deformation of a connecting ring arranged between a stationary sleeve surrounding the rotary bearing of the worm and the pressure plate.
Bei hydraulisch angetriebenen Spritzgießmaschinen kann man davon ausgehen, daß sich der Hydraulikdruck in den im Kunststoff herrschenden Druck übersetzt. Der Druck im Kunststoff kann somit aus dem Hydraulikdruck erschlossen werden, was die Verwendung teurer und störanfälliger Sensoren im Formraum überflüssig macht. Bei elektrisch angetriebenen Spritzgießmaschinen hingegen war man zunächst der Auffassung, daß das vom Antrieb abgegebene Drehmoment, welches den Druck im Kunststoff bestimmt, hinreichend durch die momentane Stromstärke bestimmt sei. Tatsächlich wird jedoch vom Motor selbst periodisch Energie aufgenommen und abgegeben, sodass durch eine Überwachung der Stromstärke zwar ein durchschnittliches Drehmoment und damit ein durchschnittlicher Druck im Material bestimmbar ist, die Überwachung des Einspritzvorganges lediglich durch Überwachung des vom Motor aufgenommenen Stromes jedoch problematisch ist.In hydraulically driven injection molding machines, it can be assumed that the hydraulic pressure translates into the pressure prevailing in the plastic. The pressure in the plastic can thus be tapped from the hydraulic pressure, which makes the use of expensive and trouble-prone sensors in the mold space superfluous. In electrically driven injection molding machines, however, it was initially believed that the torque delivered by the drive, which determines the pressure in the plastic, was sufficiently determined by the instantaneous current. In fact, however, energy is absorbed and released periodically by the engine itself, so that although an average torque and thus an average pressure in the material can be determined by monitoring the current intensity, it is problematic to monitor the injection process merely by monitoring the current consumed by the motor.
Aus den dargelegten Gründen ist man bereits relativ früh zur Erkenntnis gekommen, daß zur Überwachung des Einspritz- und Haltedruckes der in der Schnecke auftretende Druck oder der von der Schnecke ausgeübte Druck gemessen werden muss (vgl. JP 60-174625 Nissei, EP 0 230 488 A1). Häufig ergibt sich dabei ein Problem daraus, dass der Staudruck, welcher beim Plastifizieren und Dosieren des Kunststoffes auftritt, um eine Größenordnung geringer ist als gegenüber dem Einspritz- und Haltedruck und die Verformung des in bekannter Weise ausgebildeten Verbindungsringes zwischen Lagerhülse und Druckplatte kein hinreichend deutliches Signal liefert. Gemäß EP 1 151 843 wird dieser Nachteil dadurch vermieden, dass der Verbindungsring als Ringscheibe ausgebildet ist, deren innerer Rand mit der Hülse und deren äußerer Rand mit der Druckplatte verbunden ist.For the reasons set out, it has already been discovered relatively early that in order to monitor the injection and holding pressure, the pressure occurring in the screw or the pressure exerted by the screw must be measured (compare JP 60-174625 Nissei, EP 0 230 488 A1). Frequently, this results in a problem that the back pressure, which occurs during plasticizing and dosing of the plastic, by an order of magnitude less than compared to the injection and holding pressure and the deformation of the formed in a known manner connecting ring between the bearing sleeve and pressure plate is not a sufficiently clear signal supplies. According to EP 1 151 843, this disadvantage is avoided in that the connecting ring is designed as an annular disc whose inner edge is connected to the sleeve and whose outer edge is connected to the pressure plate.
Problematisch an der bekannten Einrichtung ist die Tatsache, dass die umlaufende Last leicht zu einem Störsignal führt, welche in einem mit der Schneckendrehzahl schwankenden Messsignal resultiert. Es müssen daher Maßnahmen getroffen werden, dass die Maschinensteuerung nicht in entsprechende Schwankungen im Staudruck erzeugt, welche die Qualität der Formteile beeinflussen könnten.A problem with the known device is the fact that the circulating load easily leads to an interference signal, which results in a fluctuating with the screw speed measuring signal. It must therefore be taken measures that the machine control is not generated in corresponding fluctuations in dynamic pressure, which could affect the quality of the molded parts.
Mit der Erfindung wurde eine einfache Abhilfe gegen das Auftreten eines periodischen Störsignals gefunden. Die vorgeschlagene Maßnahme besteht darin, dass das Gehäuse des die Schnecke drehenden Dosierantriebes und des zugehörigen Getriebes am Verbindungsring zwischen der das Drehlager der Schnecke umgebenden Hülse und der Dosierplatte befestigt ist und von diesem getragen wird.With the invention, a simple remedy against the occurrence of a periodic noise signal was found. The proposed measure is that the housing of the screw rotating the metering drive and the associated gear is attached to the connecting ring between the sleeve surrounding the rotary bearing of the screw and the metering plate and is supported by this.
Einzelheiten der Erfindung werden anschließend anhand der Zeichnung erläutert. In dieser zeigt Fig. 1 einen Horizontalschnitt der wesentlichen Teile einer Einspritzeinrichtung nach EP 1 151 843, Fig. 2 die zugehörige Ansicht von rechts in Fig. 1, Fig. 3 einen Vertikalschnitt durch eine gegenüber Fig. 1 und 2 erfindungsgemäße modifizierte Einrichtung.Details of the invention will be explained with reference to the drawing. 1 shows a horizontal section of the essential parts of an injection device according to EP 1 151 843, FIG. 2 shows the associated view from the right in FIG. 1, FIG. 3 shows a vertical section through a modified device according to the invention compared to FIGS.
Die in Fig. 1 und 2 dargestellte Einspritzeinrichtung ist als solche weitgehend konventionell und muß daher nicht im Detail beschrieben werden. Sie weist eine Schnecke 3 auf, welche in einem Massezylinder 2 drehbar und längsverschiebbar gelagert ist. Der Schnecke 3 zugeführter Kunststoff wird durch die Drehung der Schnecke 3 plastifiziert und im Schneckenvorraum gesammelt, bis er durch Vorschieben der Schnecke 3 in den nicht dargestellten Formhohlraum eingespritzt wird. Während des Dosierens und Einspritzens des Kunststoffes bleibt die Träger-The injector shown in Fig. 1 and 2 is as such largely conventional and therefore need not be described in detail. It has a screw 3, which is mounted rotatably and longitudinally displaceably in a mass cylinder 2. The screw 3 supplied plastic is plasticized by the rotation of the screw 3 and collected in the screw antechamber until it is injected by advancing the screw 3 in the mold cavity, not shown. During dosing and injection of the plastic, the carrier remains
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0075506U AT9495U1 (en) | 2006-10-19 | 2006-10-19 | INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE |
DE102007039620A DE102007039620B4 (en) | 2006-10-19 | 2007-08-22 | Injection device for an injection molding machine |
CN2007101802550A CN101164761B (en) | 2006-10-19 | 2007-10-16 | Ejection device for injection forming machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0075506U AT9495U1 (en) | 2006-10-19 | 2006-10-19 | INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE |
Publications (1)
Publication Number | Publication Date |
---|---|
AT9495U1 true AT9495U1 (en) | 2007-11-15 |
Family
ID=38456703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT0075506U AT9495U1 (en) | 2006-10-19 | 2006-10-19 | INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN101164761B (en) |
AT (1) | AT9495U1 (en) |
DE (1) | DE102007039620B4 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107030998B (en) * | 2016-02-03 | 2020-11-03 | 宁波弘讯科技股份有限公司 | Injection molding machine and ejection mechanism thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174625A (en) | 1984-01-31 | 1985-09-07 | Nissei Plastics Ind Co | Detecting method of injection force in motor-driven injection device |
EP0230488B2 (en) | 1984-07-24 | 1997-04-09 | Nissei Plastic Industrial Co., Ltd. | Method for controlling back pressure in electrically-operated injection apparatus |
KR100715071B1 (en) * | 2000-02-07 | 2007-05-07 | 가부시키가이샤 메이키 세이사쿠쇼 | Injection molding machine and method of controlling the injection molding machine |
ATE232784T1 (en) * | 2000-05-02 | 2003-03-15 | Engel Maschb Gmbh | INJECTION DEVICE FOR AN INJECTION MOLDING MACHINE |
-
2006
- 2006-10-19 AT AT0075506U patent/AT9495U1/en not_active IP Right Cessation
-
2007
- 2007-08-22 DE DE102007039620A patent/DE102007039620B4/en active Active
- 2007-10-16 CN CN2007101802550A patent/CN101164761B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN101164761B (en) | 2011-11-16 |
DE102007039620A1 (en) | 2008-08-21 |
CN101164761A (en) | 2008-04-23 |
DE102007039620B4 (en) | 2010-08-05 |
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Date | Code | Title | Description |
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MK07 | Expiry |
Effective date: 20161031 |