[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

DE3516666A1 - Process for producing a moulding, in particular from low-viscosity moulding compositions - Google Patents

Process for producing a moulding, in particular from low-viscosity moulding compositions

Info

Publication number
DE3516666A1
DE3516666A1 DE19853516666 DE3516666A DE3516666A1 DE 3516666 A1 DE3516666 A1 DE 3516666A1 DE 19853516666 DE19853516666 DE 19853516666 DE 3516666 A DE3516666 A DE 3516666A DE 3516666 A1 DE3516666 A1 DE 3516666A1
Authority
DE
Germany
Prior art keywords
moulding
molding compound
viscosity
low
producing
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.)
Withdrawn
Application number
DE19853516666
Other languages
German (de)
Inventor
Heinz Dr.-Ing. 5100 Aachen Derek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19853516666 priority Critical patent/DE3516666A1/en
Publication of DE3516666A1 publication Critical patent/DE3516666A1/en
Withdrawn legal-status Critical Current

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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/42—Casting under special conditions, e.g. vacuum
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/006—Degassing moulding material or draining off gas during moulding
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/24—Feeding the material into the mould
    • 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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/568—Applying vibrations to the mould parts
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/008—Using vibrations during moulding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

In a process for producing a moulding, in particular from a low- viscosity moulding composition which is introduced via a connection into a mould cavity, the moulding composition is, during its entry into the mould cavity, set into oscillation with a frequency preferably in the ultrasonic range. The introduction of the oscillations into the moulding composition can be carried out here via a diaphragm. The application of oscillations can take place in the region of the connection of the moulding tool or in an injection unit itself. <IMAGE>

Description

Beschreibungdescription

Die Erfindung betrifft ein Verfahren zur Erzeugung eines Formteils, insbesondere aus einer niedrigviskosen Formmasse, die Uber einen Anschluß in einen Formraum eingeführt wird.The invention relates to a method for producing a molded part, in particular from a low-viscosity molding compound, which via a connection in a Mold space is introduced.

Bei der Formgebung von niedrigviskosen Foramassen, z. B.When shaping low-viscosity fora masses, e.g. B.

Kunststoffmaterialien, ist eine sehr sorgfältige Führung der Volumenströme in den Formraum erforderlich, um einen Lufteinschlag und die Bildung von Blasen im Formteil zu vermeiden.Plastic materials, is a very careful management of the volume flows Required in the mold space to an air lock and the formation of bubbles to avoid in the molded part.

Es ist bereits bekannt, durch Schrägstellen der Formwerkzeuge während der Füllung des Formraums ein möglichst gleichmßiges Ansteigen der niedrigviskosen Formmassen im Formraum zu erreichen, um damit ein Einschlagen von Luft zu verhindern.It is already known by tilting the molding tools during the filling of the mold cavity, a rise in the low viscosity as evenly as possible To reach molding compounds in the mold space in order to prevent air penetration.

Einmal eingeschlossene Luft steigt aus der Formmasse nur dann auf, wenn die vorliegenden Luftblasen eine bestimmte Größe haben. Je kleiner die eingeschlossenen Luftblasen sind, umso weniger kann mit deren Austritt aus der Formmasse gerechnet werden, wobei diese Blasen dann häufig noch in unerwünschter Weise an der Fließfront hängenbleiben.Once trapped, air only rises from the molding compound when the air bubbles present have a certain size. The smaller the included There are air bubbles, the less they can be expected to emerge from the molding compound are, with these bubbles then often in an undesirable manner at the flow front get stuck.

Die bisher angewandten Maßnahmen, Gerätschaften und Schwenkeinrichtungen sind aufwendig und teuer.The measures, equipment and swiveling devices used so far are complex and expensive.

Die Aufgabe der vorliegenden Erfindung besteht nun darin, ein Verfahren der eingangs erwähnten Art so auszubilden, daß die Bildung von Luftblasen im Formraum weitgehend ausgeschlossen wird, dennoch in den Formraum eingetretene Luftblasen - auch geringer Abmessungen - zur Fließfront aufsteigen und dann aus der Nasse austreten.The object of the present invention is now to provide a method of the type mentioned in such a way that the formation of air bubbles in the mold space is largely excluded, but air bubbles that have entered the mold space - even small dimensions - rise to the flow front and then emerge from the water.

Diese Aufgabe wird bei einem Verfahren der eingangs erwähnten Art erfindungsgemäß dadurch gelöst, daß die Formmasse bei ihrem Eintritt in den Formraum in Schwingungen versetzt wird.This task is carried out in a method of the type mentioned at the beginning solved according to the invention in that the molding compound as it enters the mold space is set in vibration.

Dadurch, daß die in den Formraum einströmende Formmmasse in Schwingungen versetzt wird, wird der Auftriebseffekt der Luftblasen beträchtlich gesteigert, so daß diese schließlich die Oberflächenspannung der Formmasse überwinden und aus dieser austreten können. Sollten dennoch Luftblasen in den Formraum selbst eingetreten sein, so bewirkt die Schwingungsbeaufschlagung der Formmasse ebenfalls ein Aufsteigen dieser Luftblasen und damit schließlich ein Austreten aus der Formmasse.Because the molding compound flowing into the mold space vibrates is added, the buoyancy effect of the air bubbles is increased considerably, so that these finally overcome the surface tension of the molding compound and out this can escape. Should air bubbles nevertheless enter the mold space itself be, the application of vibrations to the molding compound also causes it to rise these air bubbles and thus ultimately an exit from the molding compound.

Das erfindungsgemäße Verfahren kann so ausgeführt werden, daß die Frequenz der Schwingungen im Ultraschallbereich liegt.The inventive method can be carried out so that the Frequency of the vibrations is in the ultrasonic range.

Das erfingungsgemäße Verfahren kann so ausgeführt werden, daß die Formmasse über eine in Schwingungen versetzte Membran geführt wird. Für eine solche Verfahrensführung sind besonders einfache Konstruktionen möglich.The inventive method can be carried out so that the Molding compound is passed over a vibrating membrane. For such a Particularly simple constructions are possible.

Schließlich kann das erfindungsgemäße Verfahren so ausgeführt werden, daß die Formmasse in dem Einspritzaggregat in Schwingungen versetzt wird. Daraus ergibt sich der Vorteil, daß ohne Veränderung der Formwerkzeuge gearbeitet werden kann.Finally, the method according to the invention can be carried out in such a way that that the molding compound is set in vibration in the injection unit. From it there is the advantage that work can be carried out without changing the molding tools can.

Ein in dieser Weise mit einem Schwingungserreger gekoppeltes Einspritzaggregat kann ohne weiteres an verschiedene Formwerkzeuge nacheinander angeschlossen werden.An injection unit coupled in this way with a vibration exciter can easily be connected to different molds one after the other.

Im folgenden Teil wird eine Ausführungsform des erfindungsgemäßen Verfahrens anhand einer Zeichnung beschrieben.The following part is an embodiment of the invention Method described using a drawing.

Die in der Zeichnung beschriebene Vorrichtung zeigt zwei Formenteile 1,5, die einen Formraum 10 definieren und auf einer Formtrennebene 7 aufeinanderstoßen. Der Formraum 10 ist mit einem Anschluß versehen, der aus einem inneren Angußkanal 8 und einem sich daran nach außen hin anschließenden äußeren Angußkanal 6 gebildet ist. Diese Kanäle 6,8 werden im Bereich der Formtrennebene 7 von den beiden Formenteilen 1,5 gebildet. In dem Formenteil 5 ist ein Ausschnitt 9 vorgesehen, der bis zu dem Angußkanal 8 reicht. Dieser Ausschnitt 9 ist gegenüber dem Angußkanal 8 durch eine Membran 2 getrennt. An dieser Membran 2 greift ein Schwingungsgenerator 3 an.The device described in the drawing shows two mold parts 1.5, which define a mold space 10 and meet on a mold parting plane 7. The mold space 10 is provided with a connection consisting of an inner runner 8 and an outer runner 6 adjoining it to the outside is. These channels 6.8 are in the area the mold parting line 7 of the two mold parts 1.5 formed. In the mold part 5, a cutout 9 is provided, which extends as far as the sprue channel 8. This cutout 9 is opposite the runner 8 separated by a membrane 2. A vibration generator engages this membrane 2 3 on.

In den äußeren Angußkanal 6 greift ein Anschlußstutzen eines Einspritzaggregats 4 ein. Aus dem Einspritzaggregat 4 wird eine niedrigviskose Formmasse, z. B. aus Kunststoff, in den äußeren Angußkanal 6 und darauf folgend in den Angußkanal 8 geführt und tritt in den Formraum 10 ein. Diese Formmasse kommt dabei mit der Membran 2 im Bereich des Angußkanals 8 in Berührung. Dabei werden Schwingungen auf die einströmende Formmasse übertragen. Dies führt dazu, daß in der Formmasse enthaltene Luftbläschen in ihrem Auftriebseffekt gestärkt werden, sich in Richtung auf den äußeren Angußkanal 8 bewegen und schließlich aus der Formmasse austreten. Die Schwingungsbeaufschlagung der Formmasse führt dazu, daß auch Luftbläschen sehr geringer Abmessungen in der Formmasse noch sich in Richtung auf die Fließfront verlagern und aus dieser schließlich austreten können.A connecting piece of an injection unit engages in the outer runner 6 4 a. From the injection unit 4, a low-viscosity molding compound, for. B. off Plastic, guided into the outer runner 6 and then into the runner 8 and enters the mold space 10. This molding compound comes with the membrane 2 in the area of the runner 8 in contact. In doing so, vibrations are applied to the inflowing Transfer molding compound. This leads to air bubbles contained in the molding compound be strengthened in their buoyancy effect towards the outer runner 8 move and finally emerge from the molding compound. The application of vibrations the molding compound leads to the fact that even very small air bubbles in the Molding compound still shift in the direction of the flow front and out of this finally can emerge.

Die Schwingungsbeaufschlagung der Formmasse während des FUllvorgangs verhindert in hohem Maße, daß eingeschlossene Luftbläschen in den Formraum 10 mitgerissen werden. Sogar dort vorliegende Luftbläschen werden durch die Schwingungsbeaufschlagung in ihrem Auftriebseffekt verstärkt, so daß auch diese Bläschen schließlich aus der Formmasse austreten können.The application of vibrations to the molding compound during the filling process prevents trapped air bubbles from being entrained into the mold space 10 to a great extent will. Even air bubbles present there are caused by the application of vibrations Increased in their buoyancy effect, so that these bubbles finally out of the Molding compound can escape.

- Leerseite -- blank page -

Claims (4)

Patentanmeldung Verfahren zur Erzeugung eines Formteils, insbesondere aus niedrigviskosen Foramassen Ansprüche 1. Verfahren zur Erzeugung eines Formteils, insbesondere aus einer niedrigviskosen Formmasse, die über einen Anschluß in einen Formraum eingeführt wird, d a d u r c h g e k e n n z e i c h n e t , daß die Formaasse bei ihrem Eintritt in den Formraum in Schwingungen versetzt wird.Patent application Process for producing a molded part, in particular from low-viscosity foramasses claims 1. A method for producing a molded part, in particular from a low-viscosity molding compound, which has a connection in a Mold space is introduced, that is, it is not indicated that the mold space is caused to vibrate when it enters the mold space. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Frequenz der Schwingungen im Ultraschallbereich liegt.2. The method according to claim 1, characterized in that the frequency the vibrations is in the ultrasonic range. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Formmasse Uber eine in Schwingungen versetzte Membran geführt wird.3. The method according to claim 1 or 2, characterized in that the Molding compound is passed over a vibrating membrane. 4. Verfahren nach einem der vorhergehenden Ansprüche unter Verwendung eines Einspritzaggregats, dadurch gekennzeichnet, daß die Formmasse in dem Einspritzaggregat in Schwingungen versetzt wird.4. The method according to any one of the preceding claims using of an injection unit, characterized in that the molding compound in the injection unit is set in vibration.
DE19853516666 1985-05-09 1985-05-09 Process for producing a moulding, in particular from low-viscosity moulding compositions Withdrawn DE3516666A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853516666 DE3516666A1 (en) 1985-05-09 1985-05-09 Process for producing a moulding, in particular from low-viscosity moulding compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853516666 DE3516666A1 (en) 1985-05-09 1985-05-09 Process for producing a moulding, in particular from low-viscosity moulding compositions

Publications (1)

Publication Number Publication Date
DE3516666A1 true DE3516666A1 (en) 1986-11-13

Family

ID=6270232

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853516666 Withdrawn DE3516666A1 (en) 1985-05-09 1985-05-09 Process for producing a moulding, in particular from low-viscosity moulding compositions

Country Status (1)

Country Link
DE (1) DE3516666A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5399305A (en) * 1991-12-13 1995-03-21 International Business Machines Corporation Dynamic gating of polymers for isotropic properties
US5662846A (en) * 1995-03-29 1997-09-02 E. I. Du Pont De Nemours And Company One-step process for producing solid surface material with foam backing
EP0904923A1 (en) * 1997-09-30 1999-03-31 Texas Instruments Incorporated Method and system for molding
WO2004009273A3 (en) * 2002-07-19 2004-03-18 Buehler Ag Moulding of a crystallisable material in the liquid or pasty state
CN105235151A (en) * 2015-11-17 2016-01-13 重庆持恒模具有限公司 Injection mold

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876909C (en) * 1944-02-06 1953-05-18 Siemens Ag Process and injection molding device for the production of moldings from organic, powdery molding compounds
DE1206570B (en) * 1961-01-19 1965-12-09 Thiokol Chemical Corp Device for casting thixotropic materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876909C (en) * 1944-02-06 1953-05-18 Siemens Ag Process and injection molding device for the production of moldings from organic, powdery molding compounds
DE1206570B (en) * 1961-01-19 1965-12-09 Thiokol Chemical Corp Device for casting thixotropic materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5399305A (en) * 1991-12-13 1995-03-21 International Business Machines Corporation Dynamic gating of polymers for isotropic properties
US5662846A (en) * 1995-03-29 1997-09-02 E. I. Du Pont De Nemours And Company One-step process for producing solid surface material with foam backing
EP0904923A1 (en) * 1997-09-30 1999-03-31 Texas Instruments Incorporated Method and system for molding
WO2004009273A3 (en) * 2002-07-19 2004-03-18 Buehler Ag Moulding of a crystallisable material in the liquid or pasty state
CN105235151A (en) * 2015-11-17 2016-01-13 重庆持恒模具有限公司 Injection mold

Similar Documents

Publication Publication Date Title
EP0024610B1 (en) Method of filling cavities of forming devices, with a reactive mixture of at least two liquid reaction components forming a solid plastics material
DE69314009T2 (en) METHOD FOR PRESSING IN PLASTIC HARDENING BY ITS REACTION IN MOLDING SPACES, AND PRESSING AID USED FOR THIS METHOD IN THE FORM OF A PILL AND HOLDER CONTAINED FROM THIS MATERIAL
DE2802237C2 (en) Injection mold for the production of injection molded parts consisting of at least two different plastic compounds and having at least two different areas
DE2461580A1 (en) METHOD FOR MANUFACTURING SHAPED OBJECTS FROM SYNTHETIC RESINS
DE2342794B2 (en) Method and device for the discontinuous production of multilayer molded parts from thermoplastic material
DE2620816A1 (en) PLASTIC SHAPED BODY AND METHOD FOR ITS MANUFACTURING
DE2705291A1 (en) METHOD AND DEVICE FOR THE PRODUCTION OF MOLDED PARTS FROM THERMOPLASTIC PLASTIC
CH633479A5 (en) INJECTION MOLD FOR THERMOPLASTIC RESINS.
DE69025626T2 (en) INJECTION MOLDING OF CROSS-LAMINATED LAMINATES
DE19508152A1 (en) Vibrating shape
DE69411512T2 (en) Device for transporting plastic substances with a high coefficient of friction, facilitating the process by vibration
DE2211705A1 (en) Process for producing form objects
DE69812996T2 (en) DEGASSING DEVICE, VENTED MOLD AND METHOD FOR PRODUCING A MOLDED OBJECT
CH667895A5 (en) PUMP FLYER WHEEL AND METHOD FOR PRODUCING THE SAME BY KO-INJECTION MOLDING.
DE3516666A1 (en) Process for producing a moulding, in particular from low-viscosity moulding compositions
EP0000886A1 (en) Process and device for producing a reaction mixture resulting in foams or homogeneous substances and for its subsequent introduction into a cavity
EP0362648A2 (en) Method for manufacturing moulded parts
DE3313448C2 (en) Measuring tube of an electromagnetic flowmeter
DE3709480A1 (en) Process and device for joining a moulded part of plastic to a metal element
DE3719700C2 (en)
EP1005408B1 (en) Method and adjustable nozzle for injection moulding plastifiable parts
DE3306253C2 (en) Method and device for casting molded parts from glass
DE69628164T2 (en) Process for the production of injection molded articles, apparatus for carrying out this process and new molded articles
DE4216393C2 (en) Post-mixer for RIM technology molds
DE19750523B4 (en) Process for the production of finned components according to the gas injection technique

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee