DE10215946B4 - Rheological measuring device for an injection molding machine - Google Patents
Rheological measuring device for an injection molding machine Download PDFInfo
- Publication number
- DE10215946B4 DE10215946B4 DE2002115946 DE10215946A DE10215946B4 DE 10215946 B4 DE10215946 B4 DE 10215946B4 DE 2002115946 DE2002115946 DE 2002115946 DE 10215946 A DE10215946 A DE 10215946A DE 10215946 B4 DE10215946 B4 DE 10215946B4
- Authority
- DE
- Germany
- Prior art keywords
- injection molding
- rheological
- measuring
- measuring device
- channel
- 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 - Fee Related
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000004413 injection moulding compound Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/442—Resins; Plastics
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/7646—Measuring, controlling or regulating viscosity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
-
- 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
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Rheologische Messeinrichtung für eine Spritzgießmaschine, mit mindestens einem Messkanal für die aus der Einspritzdüse der Spritzgießmaschine ausgetriebene Spritzgießmasse sowie einer den Druckverlust der Spritzgießmasse in Messkanal-Strömungsrichtung ermittelnden Drucksensorik, gekennzeichnet durch einen mobilen, selektiv an das Auslassende der Einspritzdüse (5) andockbaren, den Messkanal (14) und die Drucksensorik (16, 17) enthaltenden Messwertgeber (9).Rheological measuring device for an injection molding machine, with at least one measuring channel for the injection molding compound expelled from the injection nozzle of the injection molding machine and a pressure sensor system that determines the pressure loss of the injection molding compound in the measuring channel flow direction, characterized by a mobile measuring channel that can be selectively docked to the outlet end of the injection nozzle (5) (14) and the pressure sensor (16, 17) containing transducer (9).
Description
Die Erfindung bezieht sich auf eine rheologische Messeinrichtung für eine Spritzgießmaschine, nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a rheological measuring device for an injection molding machine, after the preamble of claim 1.
Um in Verbindung mit Spritzgießanlagen
die rheologischen Daten der Spritzgießmasse etwa bei einem Chargenwechsel
oder auch mehrmals innerhalb ein- und derselben Materialcharge zu
ermitteln, werden entweder externe Messeinrichtungen verwendet,
mit denen die rheologisch signifikanten Prozessparameter simuliert
werden müssen,
was einen hohen -Mess- und insbesondere Bauaufwand erfordert, oder
das Fließverhalten
der Spritzgießmasse wird,
wie aus der
Aus der
Aufgabe der Erfindung ist es, eine Messeinrichtung der eingangs genannten Art so auszubilden, dass auf bauliche einfache Weise und ohne konstruktive Änderungen der Einspritzdüse eine exakte Messung der rheologischen Daten der Spritzgießmasse zu erzielen ist.The object of the invention is a To design the measuring device of the type mentioned at the outset in such a way that in a structurally simple manner and without constructive changes the injector an exact measurement of the rheological data of the injection molding compound to achieve.
Diese Aufgabe wird erindungsgemäß durch eine Messeinrichtung mit den im Patentanspruch 1 angegebenen Merkmalen gelöstAccording to the invention, this task is accomplished by a Measuring device with the features specified in claim 1 solved
Bei der erfindungsgemäßen Messeinrichtung gelangt die Spritzgießmasse im gleichen rheologischen Zustand wie während des Einspritzvorgangs unmittelbar von der Einspritzdüse in den Messwertgeber, so dass, die bei externen Messeinrichtungen vor der eigentlichen Messstrecke sonst erforderliche, baulich aufwändige Prozesssimulation entfällt, während die Einspritzdüse selbst konstruktiv unverändert bleiben, also ohne Rücksicht auf rheometrische Gesichtspunkte einspritzoptimal gestaltet werden kann, wobei eine weitere Verringerung des messtechnischen Aufwands dadurch erzielt wird, dass der Messwertgeber erfindungsgemäß für mehrere Spritzgießmaschinen gemeinsam verwendbar ist.In the measuring device according to the invention gets the injection molding compound in the same rheological state as during the injection process immediately from the injector in the transmitter, so that before external measuring devices the actual measuring section otherwise required, structurally complex process simulation does not apply while the injector remain structurally unchanged, without consideration can be designed to be optimally injected based on rheometric criteria can, with a further reduction in the metrological effort is achieved in that the sensor according to the invention for several injection molding machines can be used together.
Im Hinblick auf eine fertigungstechnisch einfache Ausgestaltung des Messwertgebers besteht dieser vorzugsweise aus einer mit der Drucksensorik versehenen Ober- und einer mit dieser den Messkanal begrenzenden Unterplatte. Aufgrund dieser Bauweise lässt sich die Messkanalgeometrie dadurch problemlos an unterschiedliche Maschinentypen anpassen, dass für die Oberplatte mehrere, an dieser jeweils auswechselbar befestigte und an der oberplattenseitigen Kontaktfläche entsprechend der jeweils geforderten, im Allgemeinen flachschlitzförmigen Kanalgeometrie genutete Unterplatten vorgesehen sind.With regard to a manufacturing technology simple design of the transmitter preferably consists consisting of an upper and a pressure sensor lower plate delimiting the measuring channel. Because of this design let yourself the measuring channel geometry can therefore be easily applied to different machine types customize that for the top plate several, each interchangeably attached to this and on the top plate-side contact surface corresponding to the respective required, generally flat-slot-shaped channel geometry Subplates are provided.
Für eine aussagefähige theologische Untersuchung der Spritzgießmasse muss die Messung mit mindestens zwei unterschiedlichen Volumenströmen durchgeführt werden. Dies lässt sich mit der erfindungsgemäßen Messeinrichtung in besonders einfacher Weise durch eine automatische Veränderung der Vorschubgeschwindigkeit der Plastifizierschnecke während des Andockens des Messwertgebers erreichen. Um einer temperaturbedingten Verfälschung des Messergebnisses auf dem Weg der Spritzgießschmelze zwischen Einspritzdüse und Drucksensorik wirksam zu begegnen, ist der Messwertgeber vorzugsweise mit einer diesen auf Prozesstemperatur haltenden Heizeinrichtung und/oder mit einem Temperaturfühler zur Temperaturmessung der den Messkanal passierenden Spritzgießschmelze versehen.For a meaningful one Theological investigation of the injection molding compound must include measurement with at least two different volume flows can be carried out. This leaves yourself with the measuring device according to the invention in a particularly simple manner by automatically changing the Feeding speed of the plasticizing screw during the Reach the transducer docking. To a temperature-related adulteration the measurement result on the way of the injection molding melt between the injection nozzle and pressure sensor system To counteract effectively, the transmitter should preferably be equipped with a this heating device maintaining the process temperature and / or with a temperature sensor for measuring the temperature of the injection molding melt passing through the measuring channel.
Das Andocken und Abkoppeln des Messwertgebers an bzw. von der Einspritzdüse wird dadurch wesentlich vereinfacht, dass der Messwertgeber zwischen die Angussöffnung des Formwerkzeugs und die Einspritzdüse der Spritzgießmaschine einsetzbar ist, wobei der Messkanal auslassseitig ins Freie mündet, also unter Umgebungsdruck steht. Dies hat den Vorteil, dass zum einen nur ein einziger, einlassseitig des Messkanals angeordneter Druckaufnehmer zur Ermittlung des Druckverlusts der Spritzgießmasse im Messkanal erforderlich ist und dass zum anderen die Spritzgießmasse während des Messvorgangs nicht mit dem Formwerkzeug in Kontakt kommt und dann in umständlicher Weise wieder entfernt werden muss. Die Auswertung des Messergebnisses für den sich an den Messvorgang anschließenden Spritzgießprozess erfolgt in besonders bevorzugter Weise durch automatische Verarbeitung der vom Messwertgeber ermittelten, rheologischen Daten in der Maschinensteuerung.Docking and uncoupling the transmitter to or from the injector is significantly simplified in that the transmitter between the gate of the mold and the injection nozzle of the injection molding machine can be used is, where the measuring channel opens on the outlet side, so is under ambient pressure. This has the advantage that, on the one hand only a single pressure sensor arranged on the inlet side of the measuring channel required to determine the pressure loss of the injection molding compound in the measuring channel and that on the other hand the injection molding compound is not during the measuring process comes into contact with the molding tool and then in awkward Way must be removed again. The evaluation of the measurement result for the injection molding process following the measuring process is carried out in a particularly preferred manner by automatic processing of the rheological data determined by the sensor in the machine control.
Die Erfindung wird nunmehr anhand eines Ausführungsbeispiels in Verbindung mit den Zeichnungen näher erläutert. Diese zeigen in stark schematisierter Darstellung:The invention will now be described using an exemplary embodiment in conjunction with the drawing nations explained in more detail. These show in a highly schematic representation:
Die in
Zur Messung der rheologischen Daten
der Schmelze wird ein insgesamt mit 9 bezeichneter Messwertgeber
mit einer Montageplatte
Nach der Befestigung des Messwertgebers
Der beschriebene Messwertgeber
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002115946 DE10215946B4 (en) | 2002-04-11 | 2002-04-11 | Rheological measuring device for an injection molding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002115946 DE10215946B4 (en) | 2002-04-11 | 2002-04-11 | Rheological measuring device for an injection molding machine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10215946A1 DE10215946A1 (en) | 2003-11-13 |
DE10215946B4 true DE10215946B4 (en) | 2004-02-26 |
Family
ID=29224472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002115946 Expired - Fee Related DE10215946B4 (en) | 2002-04-11 | 2002-04-11 | Rheological measuring device for an injection molding machine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10215946B4 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007033969A1 (en) | 2007-07-19 | 2009-01-22 | Gneuß Kunststofftechnik GmbH | Device for measuring the viscosity of plastic melts |
CN105784547A (en) * | 2010-04-26 | 2016-07-20 | 电流感应器公司 | Portable viscometer |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU229126B1 (en) * | 2010-09-23 | 2013-08-28 | Kecskemeti Foeiskola | Test device formesuring rheological characteristic of polymer molding |
US9097565B2 (en) | 2012-03-30 | 2015-08-04 | Beaumont Technologies, Inc. | Method and apparatus for material flow characterization |
CN106415236B (en) | 2014-04-11 | 2021-04-20 | 电流感应器公司 | Viscometer and method of using the same |
WO2019243185A1 (en) * | 2018-06-21 | 2019-12-26 | Klöckner Desma Elastomertechnik GmbH | Method for the online sensing of the rheology of thermoplastic and/or elastomer material for the production of injection-moulded parts |
EP4337285A4 (en) | 2021-05-10 | 2025-03-26 | RheoSense, Inc. | REDUCED DEAD VOLUME AND HIGH DYNAMIC RANGE VISCOMETER |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69308539T2 (en) * | 1992-01-28 | 1997-10-09 | Conservatoire Nat Arts | RHEOMETER FOR INJECTION MOLDING PRESS |
DE19715630C2 (en) * | 1997-04-15 | 2000-05-31 | Inst Kunststoffverarbeitung Rw | Device and method for determining rheological material data |
EP1166994A1 (en) * | 2000-06-27 | 2002-01-02 | The Secretary of State for Trade and Industry of Her Majesty's Britannic Government | Injection moulding control system |
-
2002
- 2002-04-11 DE DE2002115946 patent/DE10215946B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69308539T2 (en) * | 1992-01-28 | 1997-10-09 | Conservatoire Nat Arts | RHEOMETER FOR INJECTION MOLDING PRESS |
DE19715630C2 (en) * | 1997-04-15 | 2000-05-31 | Inst Kunststoffverarbeitung Rw | Device and method for determining rheological material data |
EP1166994A1 (en) * | 2000-06-27 | 2002-01-02 | The Secretary of State for Trade and Industry of Her Majesty's Britannic Government | Injection moulding control system |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007033969A1 (en) | 2007-07-19 | 2009-01-22 | Gneuß Kunststofftechnik GmbH | Device for measuring the viscosity of plastic melts |
DE102007033969B4 (en) * | 2007-07-19 | 2018-09-20 | Gneuss Gmbh | Device for measuring the viscosity of plastic melts |
CN105784547A (en) * | 2010-04-26 | 2016-07-20 | 电流感应器公司 | Portable viscometer |
CN105784547B (en) * | 2010-04-26 | 2019-11-05 | 电流感应器公司 | Portable viscometer |
Also Published As
Publication number | Publication date |
---|---|
DE10215946A1 (en) | 2003-11-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE19910124B4 (en) | Ejector pin with pressure sensor | |
EP2380724B1 (en) | Measuring device and measuring method for an injection moulding machine for determining a load-specific indicator | |
EP1912774A1 (en) | Method for monitoring and/or controlling the melt filling of at least one cavity | |
DE10116760A1 (en) | Device and method for determining a coefficient of friction | |
DE3619113C2 (en) | ||
DE102013009368B4 (en) | Pressure control device for an injection molding machine | |
DE10215946B4 (en) | Rheological measuring device for an injection molding machine | |
DE3880095T2 (en) | METHOD FOR QUALITY ASSESSMENT OF AN INJECTION MOLDED PRODUCT. | |
EP1056583B1 (en) | Method for evaluating moulded parts | |
DE3040762A1 (en) | METHOD AND DEVICE FOR ADJUSTING THE MASS OF LOTS OF THERMOPLASTIC MATERIALS | |
DE19813668C2 (en) | Manufacturing device with control devices for a hollow plastic body | |
DE102009014311A1 (en) | Method for monitoring and / or controlling and / or regulating functions of and in injection molding machines | |
DE112020002436B4 (en) | Method and injection molding machine for measuring a flow index of a resin melt | |
EP1260348B1 (en) | Method for adapting an extruder nozzle to an extruder | |
EP0714331B1 (en) | Operation of a hot-chamber die-casting machine, and a die-casting machine operated in this way | |
EP3810394B1 (en) | Injection moulding machine for the online sensing of the rheology of thermoplastic and/or elastomer material for the production of injection-moulded parts | |
AT518422B1 (en) | Storage container for a molding machine | |
EP0076010B1 (en) | Apparatus for the optimization of an injection moulding process | |
EP0171609A2 (en) | Apparatus for controlling and/or limiting the mould separation force in injection-moulding machines | |
DE3521948C2 (en) | ||
DE102015007568A1 (en) | Method for monitoring the movement of a piston-cylinder unit | |
DE60010325T2 (en) | CONTROL OF AN INJECTION MOLDING MACHINE WITH ONE TOOL AND AT LEAST TWO INJECTION UNITS | |
EP2788571B1 (en) | Method and device for sealing insulating glass blanks | |
EP0829349A2 (en) | Apparatus for supplying ink | |
DE102016218389B4 (en) | Capillary rheometer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: KRAUSS MAFFEI GMBH, 80997 MUENCHEN, DE |
|
8339 | Ceased/non-payment of the annual fee |