DE10009827C2 - Device for producing objects from thermoplastic material - Google Patents
Device for producing objects from thermoplastic materialInfo
- Publication number
- DE10009827C2 DE10009827C2 DE2000109827 DE10009827A DE10009827C2 DE 10009827 C2 DE10009827 C2 DE 10009827C2 DE 2000109827 DE2000109827 DE 2000109827 DE 10009827 A DE10009827 A DE 10009827A DE 10009827 C2 DE10009827 C2 DE 10009827C2
- Authority
- DE
- Germany
- Prior art keywords
- mold
- storage space
- piston
- servo motor
- plastic
- 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
- 239000012815 thermoplastic material Substances 0.000 title description 2
- 239000004033 plastic Substances 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 241000237858 Gastropoda Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007921 spray 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
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
- B29C45/542—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw using an accumulator between plasticising and injection unit, e.g. for a continuously operating plasticising screw
-
- 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
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
-
- 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
- B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
-
- 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)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Herstellen von Gegenständen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for producing articles according to the Preamble of claim 1.
Beim Spritzgießen kleiner Präzisionsteile tritt das Problem auf, daß die zum Einspritzen verwendete Dosierschnecke die Bedingungen im Formhohlraum nicht hinreichend genau bestimmen kann. Dies hängt einerseits damit zusammen, daß der Durchmesser von Plastifizierschnecken nicht beliebig klein gemacht werden kann, andererseits damit, daß die Formhohlräume zu klein sind, um direkt überwacht zu werden, der Druck in dem zwischen Schnecke und Formhohlraum liegenden Angußbereich jedoch nicht hinreichend repräsentativ ist.When injection molding small precision parts, the problem arises that they are for injection dosing screw used the conditions in the mold cavity were not sufficient can determine exactly. On the one hand, this is due to the fact that the diameter can not be made arbitrarily small by plasticizing screws, on the other hand so that the mold cavities are too small to be monitored directly, the However, pressure in the sprue area between the screw and the mold cavity is not sufficiently representative.
In EP 0 393 389 A2 ist daher bereits eine Einrichtung zum Herstellen von Gegenständen aus thermoplastischem Kunststoff durch Spritzgießen vorgeschlagen worden, unter Verwendung einer teilbaren Form mit wenigstens einem durch die Teile der Form begrenzten Formhohlraum, in den aus einem Speicherraum mittels eines Kolbens Kunststoff einspritzbar ist, welcher aus einer Plastifiziereinrichtung dem zur Plastifiziereinrichtung und zum Formhohlraum hin absperrbaren Speicherraum zugeführt worden ist, wobei der Speicherraum und der Kolben in einem Teil der Form angeordnet sind.EP 0 393 389 A2 therefore already contains a device for producing objects made of thermoplastic material by injection molding, among Using a divisible mold with at least one through the parts of the mold limited mold cavity into which from a storage space by means of a piston Plastic is injectable, which for a plasticizing device Plasticizing device and storage space that can be blocked off from the mold cavity has been supplied, with the storage space and the piston in one part of the mold are arranged.
Wird der Speicherraum in einem Teil der Form angeordnet, so stellt er sich konstruktiv als eine Erweiterung des üblichen Heißkanals dar, in welchem der Kunststoff nie erstarrt. Die zur Absperrung des Speicherraumes bevorzugten Heißkanal-Nadelver schlußdüsen können direkt an den Boden des Formhohlraumes anschließen. Physika lisch wird dadurch der Angußbereich mit dem Speicherraum zu einer Einheit zusam mengefaßt, welche vom Formhohlraum - dessen korrekte Füllung Ziel der Erfindung ist - sauber abgegrenzt ist. Die Absperrung des Speicherraumes kann konstruktiv einfach durch die Schneckenspitze selbst, aber auch durch jede andere hiefür bekannte Ein richtung erfolgen.If the storage space is arranged in a part of the form, it is constructive as an extension of the usual hot runner, in which the plastic never stiffens. The preferred hot runner needle valve to shut off the storage space end nozzles can connect directly to the bottom of the mold cavity. Physika The sprue area with the storage space becomes a unit quantified which of the mold cavity - its correct filling is the aim of the invention - is clearly delineated. Shutting off the storage space can be structurally simple by the snail tip itself, but also by any other known one direction.
Bei der bekannten Einrichtung wird der Kolben hydraulisch betätigt. In Hinblick auf die angestrebte Präzision führt dies zu erheblichem Arbeitsaufwand, wenn Zahl oder Volumen der Formhohlräume geändert wird.In the known device, the piston is actuated hydraulically. With regard to the Targeted precision leads to significant workload when number or Volume of the mold cavities is changed.
Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art dahingehend zu verbessern, daß Geschwindigkeits- und Druckprofile dynamischer und genauer gefahren werden können.The object of the invention is a device of the type mentioned to improve in that speed and pressure profiles more dynamic and can be driven more precisely.
Erfindungsgemäß wird zur Lösung dieses Problems vorgeschlagen, daß der Kolben durch einen mit einer Formhälfte verbundenen Servomotor betätigbar ist.According to the invention to solve this problem it is proposed that the piston can be actuated by a servomotor connected to a mold half.
Eine konstruktiv besonders einfache Kolbenbetätigung ergibt sich, wenn zwar der Kolben selbst in der feststehenden Formhälfte, ein Druckstab zu dessen Betätigung der den Druckstab vorschiebende Servomotor nach Trennung der Formhälften auch die Auswerfer betätigen.A structurally particularly simple piston actuation results if the Piston itself in the fixed half of the mold, a pressure rod for its actuation the servo motor pushing the compression rod after separating the mold halves operate the ejectors.
Anschließend wird ein Ausführungsbeispiel der Erfindung anhand eines zentralen Längsschnittes durch den Form- und Einspritzbereich einer Spritzgießeinrichtung beschrieben.Then an embodiment of the invention is based on a central Longitudinal section through the molding and injection area of an injection molding device described.
Zweck der dargestellten Einrichtung ist die Bildung von Präzisionsteilen in den Hohl räumen 3, durch welche die Trennfläche der Formhälften 1 und 2 verläuft.Purpose of the device shown is the formation of precision parts in the cavities 3 through which the interface of the mold halves 1 and 2 runs.
An der feststehenden Formhälfte 1 liegt eine übliche Plastifiziereinrichtung 6 mit einer Dosierschnecke 7 an. Die Formhälfte 1 ist im Bereich der Kunststoffzuführung mit einer Heizung 8 versehen, wogegen die Umgebung der Formhohlräume 3 natürlich in übli cher Weise gekühlt ist.A conventional plasticizing device 6 with a dosing screw 7 bears against the fixed mold half 1 . The mold half 1 is provided in the area of the plastic feeder with a heater 8 , whereas the surroundings of the mold cavities 3 are naturally cooled in a usual manner.
In der Formhälfte 1 ist ein Speicherraum 4 vorgesehen, welcher durch Heißkanalver schlüsse 9 gegen die Formhohlräume 3 absperrbar ist. Solche Verschlüsse sind bekannt. Die konstruktive Ausführung eines Hohlkanals mit Nadelverschluß ist beispielsweise dem Lehrbuch von Menges "Anleitung zum Bau von Spritzgießwerk zeugen", Hanser-Verlag 1991, Seite 238 zu entnehmen.In the mold half 1 , a storage space 4 is provided, which locks 9 against the mold cavities 3 can be shut off by hot runner. Such closures are known. The structural design of a hollow channel with a needle lock can be found, for example, in the textbook by Menges "Instructions for the construction of injection molding machines", Hanser Verlag 1991, page 238.
Der Speicherraum 4 befindet sich zur Gänze in der feststehenden Formhälfte 1. Zu seiner Überwachung ist ein Druckmeßgerät 10 vorgesehen.The storage space 4 is located entirely in the fixed mold half 1 . A pressure measuring device 10 is provided for its monitoring.
Wesentlich für die Erfindung ist die Möglichkeit, mittels eines Kolbens 5 die Formhohl räume 3 ausschließlich aus dem Volumen des Speicherraumes 4 mit Kunststoff zu füllen. Zum Vorschieben des Kolbens 5 ist bei der dargestellten Ausführung ein mit dem Kolben 5 nicht verbundener Druckstab 13 vorgesehen, der durch einen Servo motor 12 definiert in axialer Richtung verstellt werden kann. Diese konstruktive Aus führung ist für das Funktionieren der Erfindung keineswegs zwingend, sie erlaubt es jedoch, nach Trennung der Formhälften 1 und 2 den Servomotor so weit nach rechts zu verschieben, bis die Anschläge 14 die Auswerfer 11 betätigen.Essential to the invention is the possibility of using a piston 5 to fill the cavity 3 exclusively from the volume of the storage space 4 with plastic. For advancing the piston 5 is provided in the illustrated embodiment, a pressure rod 13 not connected to the piston 5 , which can be adjusted by a servo motor 12 defined in the axial direction. This constructive implementation is by no means mandatory for the functioning of the invention, but it allows the servo motor to be displaced to the right until the stops 14 actuate the ejectors 11 after the mold halves 1 and 2 have been separated .
Beim Betrieb der dargestellten Einrichtung wird zunächst in der Plastifiziereinrichtung 6 fließfähiger Kunststoff vorbereitet und in den Speicherraum 4 eingeführt, während die Verschlüsse 9 gesperrt sind, sodaß zunächst kein Kunststoff in die Formhohlräume 3 gelangen kann. Anschließend wird der Speicherraum 4 zur Plastifiziereinrichtung 6 hin abgesperrt, am einfachsten durch Verschieben der Dosierschnecke 7 nach links in der Zeichnung. Die Verschlüsse 9 werden nun geöffnet, und durch Vorschieben des Kolbens 5 in den Speicherraum 4 mittels des Servomotors 12 wird eine präzise definierte Menge an Kunststoff in die Formhohlräume 3 eingeführt, wobei Spritzdruck und Nachdruck mittels des Druckmeßgerätes 10 überwacht werden können. Wenn der Kunststoff in den Formhohlräumen 3 erstarrt ist, wird der Speicherraum 4 mittels der Verschlüsse 9 abgesperrt und über die Plastifiziereinrichtung 6 nachgefüllt. Während dessen wird die Formhälfte 2 nach links in der Zeichnung verfahren, wobei der Kolben 5 mit der Formhälfte 1 verbunden bleibt. Durch Betätigung des Servomotors 12 werden die in den Formhohlräumen 3 gebildeten Präzisionsteile ausgestoßen.When the device shown is in operation, flowable plastic is first prepared in the plasticizing device 6 and introduced into the storage space 4 , while the closures 9 are locked, so that no plastic can initially get into the mold cavities 3 . The storage space 4 is then shut off from the plasticizing device 6 , most simply by moving the dosing screw 7 to the left in the drawing. The closures 9 are now opened, and by pushing the piston 5 into the storage space 4 by means of the servo motor 12 , a precisely defined amount of plastic is introduced into the mold cavities 3 , spray pressure and holding pressure being able to be monitored by means of the pressure measuring device 10 . When the plastic has solidified in the mold cavities 3 , the storage space 4 is shut off by means of the closures 9 and refilled via the plasticizing device 6 . During this, the mold half 2 is moved to the left in the drawing, the piston 5 remaining connected to the mold half 1 . By actuating the servomotor 12 , the precision parts formed in the mold cavities 3 are ejected.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT34399A AT408087B (en) | 1999-03-02 | 1999-03-02 | DEVICE FOR PRODUCING OBJECTS FROM THERMOPLASTIC PLASTIC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE10009827A1 DE10009827A1 (en) | 2000-09-07 |
| DE10009827C2 true DE10009827C2 (en) | 2003-01-02 |
Family
ID=3488094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2000109827 Expired - Fee Related DE10009827C2 (en) | 1999-03-02 | 2000-03-01 | Device for producing objects from thermoplastic material |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT408087B (en) |
| DE (1) | DE10009827C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500870B8 (en) * | 2004-12-02 | 2007-02-15 | Engel Austria Gmbh | METHOD FOR INJECTION MOLDING |
| EP1844916B1 (en) * | 2006-04-12 | 2014-06-25 | ENGEL AUSTRIA GmbH | Device for expansion injection moulding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0393389A2 (en) * | 1989-04-19 | 1990-10-24 | Husky Injection Molding Systems Ltd. | Staged shooting pot for injection molding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0724513A1 (en) * | 1993-10-18 | 1996-08-07 | Thermold Partners L.P. | Method and apparatus for injection molding |
| DE19517009A1 (en) * | 1995-05-10 | 1996-11-14 | Kautex Maschinenbau Gmbh | Injection molding machine for processing thermoplastics |
-
1999
- 1999-03-02 AT AT34399A patent/AT408087B/en not_active IP Right Cessation
-
2000
- 2000-03-01 DE DE2000109827 patent/DE10009827C2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0393389A2 (en) * | 1989-04-19 | 1990-10-24 | Husky Injection Molding Systems Ltd. | Staged shooting pot for injection molding |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA34399A (en) | 2001-01-15 |
| AT408087B (en) | 2001-08-27 |
| DE10009827A1 (en) | 2000-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0393315B1 (en) | Method for injection moulding fluid-filled plastic articles and apparatus for carrying out the method | |
| DE3834917C2 (en) | ||
| DE2106546A1 (en) | Method and device for the injection molding of objects made of plastic | |
| EP1377427A1 (en) | Method for regulating the contraction of molded parts | |
| DE69605784T2 (en) | METHOD AND SYSTEM FOR INJECTION MOLDING USING AN EXCESS SURFACE WITH VARIABLE VOLUME AND OBJECT PRODUCED BY IT | |
| WO1996035568A1 (en) | Injection-moulding machine for thermoplastics | |
| DE19613134A1 (en) | Hollow plastic product manufacture and process plant | |
| DE2355458A1 (en) | Thick-walled injection moulding with outer skin and porous core - both simultaneously injected after processing at different temps | |
| EP0489363A1 (en) | Method for injecting items of mouldable plastic and apparatus for carrying out this method | |
| EP0204133B1 (en) | Method for making objects of thermoplastic material by injection moulding | |
| DE10009827C2 (en) | Device for producing objects from thermoplastic material | |
| DE10309871B4 (en) | Method for injection molding | |
| DE4221423C2 (en) | Method and device for producing objects from thermoplastic material by injection molding | |
| DE19703316B4 (en) | Method and device for producing a nozzle cartridge | |
| DE1124234B (en) | Injection molding machine for processing thermoplastics | |
| DE1554934A1 (en) | Injection molding machine for processing plasticizable or meltable materials, in particular plastics | |
| DE2128373A1 (en) | Injection machine - for reinforced plastic materials | |
| DE4331207A1 (en) | Process and apparatus for plasticising and injection-moulding | |
| WO2001003906A1 (en) | Injection-moulding method | |
| DE19515741C2 (en) | Method and injection molding device for producing an at least partially hollow plastic body | |
| DE19734834C2 (en) | Process for the production of fiber-reinforced injection molded parts | |
| DE19724346C2 (en) | Device for plasticizing and injecting thermoplastic material | |
| DE60131737T2 (en) | INJECTION MOLDING MACHINE WITH TWO CYLINDERS | |
| EP1372932B1 (en) | Closable nozzle body and method for closing the same | |
| DE2558826A1 (en) | Ceramic injection moulding machine - keeps mould halves slightly apart during injection before moving together |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |