DE931677C - Injection nozzle for injection molding machines that process thermoplastic masses - Google Patents
Injection nozzle for injection molding machines that process thermoplastic massesInfo
- Publication number
- DE931677C DE931677C DEL14050A DEL0014050A DE931677C DE 931677 C DE931677 C DE 931677C DE L14050 A DEL14050 A DE L14050A DE L0014050 A DEL0014050 A DE L0014050A DE 931677 C DE931677 C DE 931677C
- Authority
- DE
- Germany
- Prior art keywords
- valve
- injection
- molding machines
- piston
- nozzle
- 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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/231—Needle valve systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
Die Erfindung betrifft eine Spritzdüse, mittels welcher ein bei höheren Temperaturen erweichter Kunststoff, wie Polyamid, unter Druck verspritzt wird. Die bekannten Düsen enthalten ein Ventil, insbesondere in Form eines Nadelventils, welches, mit einem Kolben verbunden, bei Betriebsdruck des Splritzgutes durch die Beaufschlagung der vorderen Kolbenfläche geöffnet und bei abnehmendem Druck durch die Wirkung einer Feder geschlossen wird. The invention relates to a spray nozzle, by means of which a higher Temperature softened plastic, such as polyamide, is injected under pressure. the known nozzles contain a valve, in particular in the form of a needle valve, which, connected to a piston, at the operating pressure of the spray material due to the application the front piston surface is opened and with decreasing pressure by the action of a Spring is closed.
Es hat sich gezeigt, daß die bekannten Feder materialien bei den zur Anwendung kommenden hoben Temperaturen nach einer gewissen Zeit exmüden, so daß ein zuverlässiger Verschluß der Spritzdüsle nicht mehr gewährleistet wird. It has been shown that the known spring materials in the applied elevated temperatures ex-tired after a certain time, so that a reliable closure of the spray nozzle is no longer guaranteed.
Die Spritzdüse nach der Erfindung ist. frei von diesem Nachteil, da sie auf die Anwendung einer den Temperaturen des Spritzgutes ansgesletzten Verschlußfeder verzichtet. Erfindungsgemäß ist der als Nadelventil ausgebildete Ventilschaft mit einer Zahnstange versehen, in die ein Ritzel eingreift, welches mit einem außerhalb des- Düsenkörpers befindlicben und durch eine Feder gespannten oder einem Gewicht belasteten Schwenkhebel verbunden ist. Die Öffnung des Ventils kann entweder durch Handbetätigung des Hebels erfolgen oder aber auto,matisch in Abhängigkeit von der Stellung des der Spritzguff'ördenmg dienenden Kolbens gesteuert werden. Eine besonders einfache Steuerung des Ventils ergibt sich, wenn der mit ihm verbundene Schaft in an sich bekannter Weise als Kolben ausgebildet wird, dessen Vorderfläche beim Eetriebsdruck durch das Spritzgut in die Offen-Stellung gedrückt wird. Allen Lösungen gemeinsam ist der Vorzug, daß die Verschlußb,ewegung des Ventils durch Mittel erfolgt, welche den hohen Temperaturen des erweichten Spritzgutes nicht ausgesetzt sind. The spray nozzle according to the invention is. free from this disadvantage, since it relies on the use of a locking spring attached to the temperature of the material to be sprayed waived. According to the invention, the valve stem, which is designed as a needle valve, is also included provided a rack in which a pinion engages, which with an outside des- nozzle body located and tensioned by a spring or a weight loaded pivot lever is connected. The opening of the valve can either be through The lever can be operated manually or automatically, depending on the Position of the Spritzguff'ördenmg serving piston are controlled. A special one simple control of the valve results when the stem connected to it in is designed in a known manner as a piston, the front surface of which at operating pressure is pushed into the open position by the spray material. Common to all solutions the advantage is that the closure movement of the valve takes place by means which are not exposed to the high temperatures of the softened spray material.
In den Abb. I und 2 ist ein Ausführungsbeispiel einer Spritzdüse nach der Erfindung im Längsschnitt und in der Draufsicht dargestellt. Durch einen Ringkanal Ia im Düsenkölrper r wird das Spritzgut der Austrittsöffnimg unter Kolbendruck zugeführt. Das Ventil 3, welches in Form eines Nadelventils bei außer Betrieb befindlicher Maschiene bzw. während der Betriebspausen die Austrittsöffnung 2a im Düsenkopf 2 verschließt, ist an einem Schaft 4 befestigt, der erfindnngsgemäß als Zahnstange ausgebildet und im Eingriff mit einem Ritzel 5 ist. Mit diesem ist ein Hebel 6 starr verbunden, durch dessen Drehung im einen oder anderen Sinne die Öffnung oder Schließung des Ventils kraftschlüssig erfolgt. Der Schaft 4 steht kolbenartig unter dem Druck des durch den Ringkanal zuströmenden Spritzgutes, das bei betriebsmäßigem Druck den Schaft zurückzudrücken bestrebt ist. Die Belastung des Hebels 6 mit einem Gewicht oder einer Feder ist so bemessen, daß sie bei betriebs'mäßigem Druck des Spritzgutes überwunden und das Ventil geöffnet wird. In Figs. I and 2 is an embodiment of a spray nozzle shown according to the invention in longitudinal section and in plan view. Through a Annular channel Ia in the nozzle body r, the spray material is the outlet opening under piston pressure fed. The valve 3, which is in the form of a needle valve when not in operation Machine or the outlet opening 2a in the nozzle head 2 during the operational breaks closes, is attached to a shaft 4, which according to the invention as a rack and is in engagement with a pinion 5. With this a lever 6 is rigid connected, by its rotation in one sense or another the opening or closing of the valve takes place in a non-positive manner. The shaft 4 is under pressure like a piston of the spray material flowing in through the annular channel, which is produced at normal operating pressure tries to push back the shaft. The loading of the lever 6 with a weight or a spring is dimensioned in such a way that it can be operated when the pressure of the material to be sprayed is operating overcome and the valve is opened.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL14050A DE931677C (en) | 1952-12-02 | 1952-12-02 | Injection nozzle for injection molding machines that process thermoplastic masses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL14050A DE931677C (en) | 1952-12-02 | 1952-12-02 | Injection nozzle for injection molding machines that process thermoplastic masses |
Publications (1)
Publication Number | Publication Date |
---|---|
DE931677C true DE931677C (en) | 1955-08-16 |
Family
ID=7259697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL14050A Expired DE931677C (en) | 1952-12-02 | 1952-12-02 | Injection nozzle for injection molding machines that process thermoplastic masses |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE931677C (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1077863B (en) * | 1954-05-17 | 1960-03-17 | Wilhelm Schmidt | Sealing nozzle for injection cylinders of injection molding machines |
DE1104684B (en) * | 1955-10-11 | 1961-04-13 | Paul Rzanny | Injection nozzle for thermoplastics processing injection molding machines |
DE1124234B (en) * | 1953-12-07 | 1962-02-22 | F J Stokes Machine Company | Injection molding machine for processing thermoplastics |
DE1125155B (en) * | 1957-08-05 | 1962-03-08 | Arburg Feingeraete Fabrik O H | Injection nozzle for thermoplastics processing injection molding machine |
DE1176352B (en) * | 1958-02-22 | 1964-08-20 | Plast Anstalt | Injection nozzle with closing device for injection molding machines |
DE1224913B (en) * | 1960-02-23 | 1966-09-15 | Hydroplast Sa | Method and device for the automatic control of the injection process of injection molding machines |
EP0373293A2 (en) * | 1988-12-16 | 1990-06-20 | Jobst Ulrich Gellert | Injection molding rack and pinion valve pin actuating mechanism |
WO1996027489A1 (en) * | 1995-03-03 | 1996-09-12 | Stern Christian Rene | Heated tool nozzle |
IT202000004351A1 (en) * | 2020-03-02 | 2021-09-02 | Sipa Progettazione Automaz | COMPONENT FOR NOZZLE FOR INJECTION SYSTEM TO PRODUCE PLASTIC CONTAINERS |
-
1952
- 1952-12-02 DE DEL14050A patent/DE931677C/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1124234B (en) * | 1953-12-07 | 1962-02-22 | F J Stokes Machine Company | Injection molding machine for processing thermoplastics |
DE1077863B (en) * | 1954-05-17 | 1960-03-17 | Wilhelm Schmidt | Sealing nozzle for injection cylinders of injection molding machines |
DE1104684B (en) * | 1955-10-11 | 1961-04-13 | Paul Rzanny | Injection nozzle for thermoplastics processing injection molding machines |
DE1125155B (en) * | 1957-08-05 | 1962-03-08 | Arburg Feingeraete Fabrik O H | Injection nozzle for thermoplastics processing injection molding machine |
DE1176352B (en) * | 1958-02-22 | 1964-08-20 | Plast Anstalt | Injection nozzle with closing device for injection molding machines |
DE1224913B (en) * | 1960-02-23 | 1966-09-15 | Hydroplast Sa | Method and device for the automatic control of the injection process of injection molding machines |
EP0373293A2 (en) * | 1988-12-16 | 1990-06-20 | Jobst Ulrich Gellert | Injection molding rack and pinion valve pin actuating mechanism |
EP0373293A3 (en) * | 1988-12-16 | 1991-06-12 | Jobst Ulrich Gellert | Injection molding rack and pinion valve pin actuating mechanism |
WO1996027489A1 (en) * | 1995-03-03 | 1996-09-12 | Stern Christian Rene | Heated tool nozzle |
IT202000004351A1 (en) * | 2020-03-02 | 2021-09-02 | Sipa Progettazione Automaz | COMPONENT FOR NOZZLE FOR INJECTION SYSTEM TO PRODUCE PLASTIC CONTAINERS |
WO2021176346A1 (en) * | 2020-03-02 | 2021-09-10 | S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. | Component for a nozzle of an injection molding apparatus as well as corresponding nozzle and injection molding apparatus |
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