DE10243248B4 - Plasticizing and injection unit of a plastic injection molding machine - Google Patents
Plasticizing and injection unit of a plastic injection molding machine Download PDFInfo
- Publication number
- DE10243248B4 DE10243248B4 DE2002143248 DE10243248A DE10243248B4 DE 10243248 B4 DE10243248 B4 DE 10243248B4 DE 2002143248 DE2002143248 DE 2002143248 DE 10243248 A DE10243248 A DE 10243248A DE 10243248 B4 DE10243248 B4 DE 10243248B4
- Authority
- DE
- Germany
- Prior art keywords
- plasticizing
- pressure medium
- injection unit
- motor
- pump
- 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
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
- 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
- B29C2045/1794—Machine parts driven by an electric motor, e.g. electric servomotor by a rotor or directly coupled electric motor, e.g. using a tubular shaft motor
-
- 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
- B29C2045/5024—Drive means therefor screws rotated by the coaxial rotor of an electric motor
-
- 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
- B29C2045/5036—Drive means therefor using means for detecting injection or back pressures back pressure obtaining means
-
- 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
- B29C2045/5068—Drive means therefor mechanical drive means in series with hydraulic drive means for axially movable screw
Abstract
Plastifizier- und Einspritzeinheit einer Kunststoffspritzgießmaschine mit einer in einem Spritzzylinder (20) angeordneten Schnecke (19), mit einem gemeinsamen Antriebsmotor für die rotatorische und die translatorische Bewegung der Schnecke (19), wobei für die translatorische Bewegung der Schnecke (19) eine mit dem Antriebsmotor verbundene Druckmittelpumpe (12) und wenigstens ein von dieser bewegter Gleichgangzylinder (11) vorgesehen sind, wobei Hydraulikleitungen (13, 14) vorgesehen sind, die die Ein- und Ausgänge der Gleichgangzylinder (11) und der Druckmittelpumpe (12) miteinander verbinden, so dass ein geschlossener Hydraulikkreis gebildet wird, und wobei die Druckmittelpumpe (12) auch als Druckmittelmotor arbeiten kann und Elemente (15) zur Veränderung ihrer Pumpen- bzw. Motorschluckmenge besitzt, die an eine Regeleinrichtung (16) angeschlossen sind, dadurch gekennzeichnet, dass als gemeinsamer Antriebsmotor ein Hohlwellenmotor (1) vorgesehen ist, dessen Rotor-Hohlwelle (2) unmittelbar an die Antriebswelle (5) der Schnecke (19) gekuppelt ist.plasticizing and injection unit of a plastic injection molding machine with one in one Injection cylinder (20) arranged screw (19), with a common Drive motor for the rotational and the translational movement of the screw (19), being for the translational movement of the worm (19) one with the drive motor connected pressure medium pump (12) and at least one of these moved Gleichgangzylinder (11) are provided, wherein hydraulic lines (13, 14) are provided, which the inputs and outputs of the Gleichgangzylinder (11) and the pressure medium pump (12) connect to each other, so that a closed hydraulic circuit is formed, and wherein the pressure medium pump (12) can also work as a pressure medium motor and elements (15) for change their pump or Has engine intake, which is connected to a control device (16) are, characterized in that as a common drive motor a hollow shaft motor (1) is provided, the rotor hollow shaft (2) directly to the drive shaft (5) of the screw (19) coupled is.
Description
Die Erfindung betrifft eine Plastifizier- und Einspritzeinheit einer Kunststoffspritzgießmaschine gemäß dem Oberbegriff von Patentanspruch 1.The The invention relates to a plasticizing and injection unit of a Plastic injection molding machine according to the preamble of claim 1.
Aus
der gattungsbildenden
Nachteilig
an dieser bekannten Plastifizier- und Einspritzeinheit ist die Verwendung
eines mechanischen Getriebes für
die Untersetzung der Motordrehzahl des Servomotors auf die für die Plastifizierschnecke
höchstzulässige Drehzahl.
Für kleine Plastifizierschneckendurchmesser
ist die Massenträgheit
des gesamten mehrstufigen Getriebes im Verhältnis zu der Massenträgheit der
Schnecke viel zu hoch. Die Folge ist z. B. ein Nachlaufen des Getriebes
und damit der Schneckenkupplungswelle bei Dosierstop. Dies hat zur
Folge, dass die Konstanz der aufgeschmolzenen Kunststoffmenge sehr
ungenügend
ist. Aufgrund der verhältnismäßig hohen
Gesamtmasse der Einspritzeinheit, die den Spritzhub mit ausführen muss,
ist die Regelgüte
der Prozessparameter ebenfalls unzufriedenstellend. Versuche haben
gezeigt, dass die Regelbarkeit des Einspritz- und Plastifizierprozesses
mit der aus der
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine Plastifizier- und Einspritzeinheit einer Kunststoffspritzgießmaschine anzugeben, mit der eine höhere Konstanz der aufgeschmolzenen Kunststoffmenge erreicht wird, insbesondere bei kleinen Schussgewichten und mit der darüberhinaus ein sehr geräuscharmer und energieeffizienter Betrieb möglich ist.outgoing It is the object of the invention to provide a plastifying and to provide injection unit of a plastic injection molding machine, with the a higher one Constance of the molten amount of plastic is achieved, in particular at small shot weights and with the moreover a very low noise and energy efficient operation possible is.
Die Lösung dieser Aufgabe erfolgt durch eine Plastifizier- und Einspritzeinheit gemäß Anspruch 1. Vorteilhafte Ausgestaltungen und Weiterentwicklungen finden sich in den Unteransprüchen.The solution This task is performed by a plasticizing and injection unit according to claim 1. Advantageous embodiments and further developments can be found in the subclaims.
Dadurch, dass ein Hohlwellen-Motor vorgesehen ist, der direkt an die Schneckenantriebswelle gekuppelt ist, kann auf einen üblichen Servomotor und ein mechanisches Getriebe verzichtet werden. Die bewegte Masse und vor allem das Massenträgheitsmoment der rotierenden Antriebselemente ist gegenüber dem zitierten Stand der Technik signifikant kleiner und die Dynamik des Systems damit signifikant höher. Ferner ist das Bauvolumen der Einspritzeinheit durch den Einsatz des Direktantriebs erheblich kleiner und die Herstellungskosten liegen niedriger. Ausserdem eignet sich die erfindungsgemäße Plastifizier- und Einspritzeinheit in besonderer Weise für kleine Spritzgießmaschinen.Thereby, that a hollow shaft motor is provided, which is coupled directly to the worm drive shaft is, can on a usual Servomotor and a mechanical transmission are dispensed with. The moving mass and especially the mass moment of inertia of the rotating Drive elements is opposite the cited prior art significantly smaller and the dynamics the system thus significantly higher. Furthermore, the volume of construction of the injection unit through the use the direct drive considerably smaller and the manufacturing cost are lower. In addition, the plasticizer according to the invention is suitable. and injection unit in a special way for small injection molding machines.
Nachfolgend
soll die Erfindung anhand eines Ausführungsbeispiels und unter Bezugnahme
auf die
Gemäß der
Der Staudruck zwischen Schnecke und Spritzzylinder wird direkt auf den Gleichgangzylinder und damit auf den geschlossenen Hydraulikkreislauf übertragen. Durch Einsatz einer Pumpe, bei der die Förderströmrichtung des hydraulischen Mediums beliebig einstellbar ist, kann mit einfachen Mitteln unabhängig von der Drehrichtung des Elektromotors der Staudruck der Kunststoffmasse exakt eingestellt werden.Of the Back pressure between the screw and the injection cylinder is directly on the Synchronous cylinder and thus transferred to the closed hydraulic circuit. By using a pump, in which the conveying direction of the hydraulic Medium is arbitrarily adjustable, can be determined by simple means regardless of the direction of rotation of the electric motor, the back pressure of the plastic mass be set exactly.
- 11
- Hochmomenten-Hohlwellen-ServomotorHigh torque hollow shaft servomotor
- 22
- Rotor-HohlwelleRotor hollow shaft
- 33
- Mitnehmerwelleclutch shaft
- 44
- Freilauf oder Kupplung, schaltbarfreewheel or clutch, switchable
- 55
- SchneckenantriebswelleWorm drive shaft
- 66
- RücklaufsperreBackstop
- 77
- AntriebswellenlagergehäuseDrive shaft bearing housing
- 88th
- Kupplungclutch
- 99
- Lager axialcamp axial
- 1010
- Lager radialcamp radial
- 1111
- GleichgangzylinderRod cylinders
- 1212
- DruckmittelpumpeHydraulic pump
- 1313
- erste hydraulische Leitung vorfirst hydraulic line in front
- 1414
- zweite hydraulische Leitung zurücksecond hydraulic line back
- 1515
- Element zur Verstellungelement for adjustment
- 1616
- Regeleinrichtungcontrol device
- 1717
- Drucksensorpressure sensor
- 1818
- MessleitungMeasurement line
- 1919
- Schneckeslug
- 2020
- Spritzzylinderinjection cylinder
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002143248 DE10243248B4 (en) | 2002-09-17 | 2002-09-17 | Plasticizing and injection unit of a plastic injection molding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002143248 DE10243248B4 (en) | 2002-09-17 | 2002-09-17 | Plasticizing and injection unit of a plastic injection molding machine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10243248A1 DE10243248A1 (en) | 2004-04-01 |
DE10243248B4 true DE10243248B4 (en) | 2005-12-22 |
Family
ID=31969181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002143248 Expired - Fee Related DE10243248B4 (en) | 2002-09-17 | 2002-09-17 | Plasticizing and injection unit of a plastic injection molding machine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10243248B4 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004033690A1 (en) * | 2004-07-09 | 2006-02-16 | Demag Ergotech Gmbh | Injection molding machine |
DE102004056209B4 (en) * | 2004-11-22 | 2011-06-01 | Siemens Ag | Linearly displaceable rotary drive for a plastic injection molding machine |
DE102005023892A1 (en) * | 2005-05-24 | 2006-11-30 | Bosch Rexroth Aktiengesellschaft | Injection unit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0785059A1 (en) * | 1996-01-18 | 1997-07-23 | MANNESMANN Aktiengesellschaft | Plasticising and injection unit of a plastic injection moulding unit |
DE10135516A1 (en) * | 2000-08-08 | 2002-06-20 | Mannesmann Rexroth Ag | Drive for closure-, injection- or ejection units of pressure injection molding machine has electric motor selectively displacing nested concentric piston-cylinder arrangement |
DE10061329A1 (en) * | 2000-12-04 | 2002-07-18 | Mannesmann Plastics Machinery | Injection unit for an injection molding machine |
-
2002
- 2002-09-17 DE DE2002143248 patent/DE10243248B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0785059A1 (en) * | 1996-01-18 | 1997-07-23 | MANNESMANN Aktiengesellschaft | Plasticising and injection unit of a plastic injection moulding unit |
DE10135516A1 (en) * | 2000-08-08 | 2002-06-20 | Mannesmann Rexroth Ag | Drive for closure-, injection- or ejection units of pressure injection molding machine has electric motor selectively displacing nested concentric piston-cylinder arrangement |
DE10061329A1 (en) * | 2000-12-04 | 2002-07-18 | Mannesmann Plastics Machinery | Injection unit for an injection molding machine |
Also Published As
Publication number | Publication date |
---|---|
DE10243248A1 (en) | 2004-04-01 |
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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: SUMITOMO (SHI) DEMAG PLASTICS MACHINERY GMBH, , DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |