DE1303857C2 - SCREW INJECTION MOLDING MACHINE FOR THE PROCESSING OF CROSS-LINKING PLASTICS - Google Patents
SCREW INJECTION MOLDING MACHINE FOR THE PROCESSING OF CROSS-LINKING PLASTICSInfo
- Publication number
- DE1303857C2 DE1303857C2 DE19631303857D DE1303857DA DE1303857C2 DE 1303857 C2 DE1303857 C2 DE 1303857C2 DE 19631303857 D DE19631303857 D DE 19631303857D DE 1303857D A DE1303857D A DE 1303857DA DE 1303857 C2 DE1303857 C2 DE 1303857C2
- Authority
- DE
- Germany
- Prior art keywords
- screw
- processing
- injection
- injection molding
- mass
- 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
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
- B29C45/58—Details
- B29C45/585—Vibration means for the injection unit or parts thereof
-
- 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1816—Feeding auxiliary material, e.g. colouring material
-
- 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
-
- 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
-
- 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
- B29C2045/548—Reciprocating plasticising screws
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
I 303I 303
dungsgemäß in der Spritzgießeinheit kurz vor der Formteilherstellung erfolgt und die Masse deshalb nic-it vorbereitet der Maschine aufgegeben werden muß. Während der Lagerung bewirkten die in den Rohmaterial-Mischungen befindlichen chemischen Komponenten schon bei Zimmertemperatur vorzeitige Vernetzungserscheinungen, wodurch dieses Material für die Weiterverarbeitung weniger — bis unbrauchbar wurde.duly takes place in the injection molding unit shortly before the molding and the mass therefore nic-it has to be prepared for the machine to be abandoned. During storage, the Chemical components contained in raw material mixtures even at room temperature premature Cross-linking, which makes this material less for further processing - up became unusable.
Die Erfindung soll nachfolgend an Hand der Zeichnung näher erläutert werden.The invention is to be explained in more detail below with reference to the drawing.
Die in der Zeichnung gezeigte und an eine Spritzform anliegende Spritzgießeinheit besteht im wesentlichen aus einem Schneckenzylinder 1, einem Getriebegehäuse 2 und einem Druckzylinder 3. Der Schneckenzylinder 1 trägt an seinem vorderen Ende eine Düse 4, während auf seiner Mantelfläche Heizbänder 5 angeordnet sind. Im Schneckenzylinder 1 ist eine Plastifizierschnecke 6 dreh- und axial verschiebbar gelagert.The injection molding unit shown in the drawing and resting against an injection mold consists essentially from a screw cylinder 1, a gear housing 2 and a pressure cylinder 3. The The screw cylinder 1 carries a nozzle 4 at its front end, while heating strips are provided on its outer surface 5 are arranged. A plasticizing screw 6 can be rotated and axially displaced in the screw cylinder 1 stored.
Ein Arbeitsvorgang nach der Erfindung läuft wie folgt ab:A working process according to the invention proceeds as follows:
Das zu verarbeitende Rohmaterial wird zunächst in an sich bekannter Weise mit den üblichen Mischungs-Bestandteilen wie Ruß, Weichmacher, Alterungs-Schutzmittel, Farbstoffe und Vernetzungsmittel gemischt. Diese Mischungen (Compounds) werden anschließend sofort dem Einfülltrichter 7 der Spritzgießeinheit aufgegeben, von wo sie in den Innenraum des Schneckenzylinders 1 gelangen. Dort erfolgt nun das vor dem Einspritzvorgang (Formteilherstellung) erforderliche Kneten, weiteres Mischen, Homogenisieren, Vorwärmen und Fördern durch die Rotation der Schnecke 6 und durch eine der Schnecke 6 überlagerte axiale Pulsation. Die Rotation der Schnecke 6 wird dabei vom Elektromotor 8 über das Getriebe 9 bewirkt, während die axiale Pulsation durch wechselseitiges Beaufschlagen der Druckräume 10 und 11 mit einem Druckmedium über die Zuleitungen 12 und 13 erfolgen kann.The raw material to be processed is first mixed with the usual in a manner known per se Mixing ingredients such as carbon black, plasticizers, anti-aging agents, dyes and crosslinking agents mixed. These mixtures (compounds) are then immediately added to the hopper 7 Injection molding unit abandoned, from where they get into the interior of the screw cylinder 1. there the kneading, further mixing required before the injection process (molding production) takes place, Homogenizing, preheating and conveying through the rotation of the screw 6 and through one of the Worm 6 superimposed axial pulsation. The rotation of the screw 6 is controlled by the electric motor 8 effected via the gear 9, while the axial pulsation is caused by alternating action of the Pressure chambers 10 and 11 can be carried out with a pressure medium via the supply lines 12 and 13.
Während dieser VorbereUungs-Phase fur de« Em spritzvorgang sammelt sich infolge der durch^e Schnecken-Rotation entstehenden Ff*™g zwischen Düse 4 und Schneckenkopf 14 d Formteil-Herstellung erforderliche MasseDuring this phase VorbereUungs for de "Em injection process accumulates due to the incurred by e ^ screw rotation F f * ™ g between the nozzle 4 and screw head 14 d molding manufacturing required mass
denthe
vorbereitete Masse wird durch eine bung der Schnecke 6 durch die Düse menhohlraum 16 der Spntzfonn 17,17 Wenn das so hergestellte Formteil imprepared mass is by an exercise of the screw 6 through the nozzle Menhohlraum 16 der Spntzfonn 17,17 If the molded part produced in this way is in
raum 16 vollständig verfestigt ^^ Formhälften 17 und 17' in an sich bekannterspace 16 completely solidified ^^ mold halves 17 and 17 'in known
TSn und das Formteil kann herausgenom-TSn and the molded part can be removed
gen erzielt, ohne daii aie l gen achieved without daii aie l
schine vorgenommenen Mischmaßnahmen nötigMixing measures carried out by the machine are necessary
wären.would be.
Eine vorzeitige Vernetzung im SchneckenzylinderPremature networking in the screw barrel
wird dadurch verhindert, daß die den Vernetzungsprozeß beschleunigende chemische Komponente (Accelerator bzw. Katalysator) in Form einer Vormischung (Masterbatch) an der Eingabeseite des Zylinders der zu verarbeitenden Masse erst währendis thereby prevented that the chemical component accelerating the crosslinking process (Accelerator or catalyst) in the form of a premix (masterbatch) on the input side of the Cylinder of the mass to be processed only during
der Vorbereitung und Förderung oder durch an sich bekannte Bohrungen der Schnecke oder des Zylinders beigegeben wird. Letzteres schließt die Möglichkeit ein, daß diese Komponente der zu verarbeitenden Masse erst während der Einspritzung durch eine Zuführleitung an der Spritzdüse zugeführt wird.the preparation and conveyance or through known holes in the screw or cylinder is added. The latter includes the possibility that this component of the to be processed Mass is only supplied during the injection through a supply line to the spray nozzle.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
drehbaren Schnecke und mit einem zum Zwecke Die Erfindung löst diese Aufgabe durch Anwender Einspritzung axial bewegbaren Kolben, bei dung des in dem deutschen Patent 1 140 340 niederder eine der Schnecke unabhängig von deren gelegten Erfindungsgedankens, nämlich durch die Drehbewegung eine pulsierende Axialbewegung Verwendung einer zur Verarbeitung von thermo-(Vibration) aufzwingende Antriebsvorrichtung 15 plastischen Kunststoffen bestimmten Schneckenvorgesehen ist, die so einstellbar ist, daß Fre- Spritzgießmaschine mit mindestens einer zum Zwecke quenz und Amplitude der pulsierenden Axial- der Förderung und Plastifizierung drehbaren und bewegung den jeweiligen Gegebenheiten des zum Zwecke der Einspritzung axial bewegbaren Spritzgießbetriebes anpaßbar ist (nach Patent Schnecke oder mit mindestens einer zum Zwecke 1140 340) zur Verarbeitung vernetzender Kunst- 20 der Förderung und Plastifizierung drehbaren stoffe, die im Rohzustand und mit Zusatzstoffen Schnecke und mit einem zum Zwecke der Einspritversehen aufgegeben werden, mit der Maßgabe, zung axial bewegbaren Kolben, bei der eine der daß die den Vernetzungsprozeß beschleunigende Schnecke unabhängig von deren Drehbewegung eine Komponente in Form einer Vormischung (Master- pulsierende Axialbewegung (Vibration) aufzwingende batch) an der Eingabeseite des Schneckenzylin- 35 Antriebsvorrichtung vorgesehen ist, die so einstellbar ders oder durch an sich bekannte Bohrungen der ist, daß Frequenz und Amplitude der pulsierenden Schnecke oder des Zylinders vor der Spritzdüse Axia'be'vegung den jeweiligen Gegebenheiten des zugegeben wird. Spritzgießbetriebes anpaßbar ist, nach Patentto prevent cross-linking of the mass able to occur axially for the purpose of injection, movable screw or at least one to make the preparatory measures more economical for the purpose of conveying and plasticizing ok and less time-consuming,
rotatable screw and with a for the purpose of the invention solves this problem by user injection axially movable piston, in the case of the lower one of the screw in the German patent 1 140 340 regardless of the inventive concept, namely through the rotary movement a pulsating axial movement using a for processing of thermo- (vibration) imposing drive device 15 plastic plastics specific screw is provided, which is adjustable so that Fre- injection molding machine with at least one for the purpose of quency and amplitude of the pulsating Axial- the promotion and plasticization rotatable and movement to the respective conditions of the for the purpose of Injection axially movable injection molding operation is adaptable (according to patent screw or with at least one for the purpose of 1140 340) for processing cross-linking plastics 20 the promotion and plasticization of rotatable materials, which in the raw state and with additives screw and with a purpose Ke the injection provided, with the proviso, axially movable piston, in which one of the that the crosslinking process accelerating screw a component in the form of a premix (master pulsating axial movement (vibration) imposing batch) on the input side of the Screw cylinder drive device is provided, which is adjustable, or by means of known bores, that the frequency and amplitude of the pulsating screw or the cylinder in front of the spray nozzle Axia'be'vendung is added to the respective conditions. Injection molding company is adaptable, according to patent
Spritzgießeinheit, zu bringen. Durch die erfindungsgemäße Maßnahme wird esPart of the processing of cross-linking substances To see the kneading, mixing, homo-preparation and feeding processes necessary for the preparation for injection (form is also in the lengthy and costly production of advantages), which are done, preheating and conveying thus have the task of a processable mass in each case by the rotation and by a superimposed axial to the processing point, for example to a pulsation of the screw or screws.
Injection molding unit to bring. The measure according to the invention makes it
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA29372A DE1140340B (en) | 1958-04-30 | 1958-04-30 | Screw injection molding machine for processing thermoplastics |
DE1303857 | 1963-02-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1303857B DE1303857B (en) | 1973-06-20 |
DE1303857C2 true DE1303857C2 (en) | 1974-05-09 |
Family
ID=32657390
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA29372A Pending DE1140340B (en) | 1958-04-30 | 1958-04-30 | Screw injection molding machine for processing thermoplastics |
DE19631303857D Expired DE1303857C2 (en) | 1958-04-30 | 1963-02-02 | SCREW INJECTION MOLDING MACHINE FOR THE PROCESSING OF CROSS-LINKING PLASTICS |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA29372A Pending DE1140340B (en) | 1958-04-30 | 1958-04-30 | Screw injection molding machine for processing thermoplastics |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE1140340B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3335457A (en) * | 1964-10-19 | 1967-08-15 | Hoover Ball & Bearing Co | Blow molding machine with continuously rotating reciprocating extruder screw |
US3978978A (en) * | 1972-03-10 | 1976-09-07 | Martin Herter | Apparatus for conveying particulate materials |
DE3315707A1 (en) * | 1983-04-29 | 1984-10-31 | Bayer Ag, 5090 Leverkusen | PLASTIC MOLDED PART WITH REINFORCED INSERTS |
US5156858A (en) * | 1984-12-21 | 1992-10-20 | National Research Development Corporation | Apparatus for controlling the molding of a solid product in a mold cavity from molten material which is repeatedly moved within the mold cavity |
CA1243462A (en) * | 1984-12-21 | 1988-10-25 | Peter S. Allan | Moulding process |
US5494426A (en) * | 1992-05-11 | 1996-02-27 | Thermold Partners L.P. | Vibrating wall surfaces for molding deformable materials |
US5770131A (en) * | 1996-01-02 | 1998-06-23 | Thermold Partners, L.P. | Method and apparatus for applying an oscillating force on a molten material |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE529680C (en) * | 1928-04-02 | 1931-07-16 | John Strindlund | Device on screw presses, conveyor screws, screw pumps, etc. like |
-
1958
- 1958-04-30 DE DEA29372A patent/DE1140340B/en active Pending
-
1963
- 1963-02-02 DE DE19631303857D patent/DE1303857C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1140340B (en) | 1962-11-29 |
DE1303857B (en) | 1973-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |