DE848689C - Safety device for injection or compression molding machines operated by piston pressure - Google Patents

Safety device for injection or compression molding machines operated by piston pressure

Info

Publication number
DE848689C
DE848689C DEM2146D DEM0002146D DE848689C DE 848689 C DE848689 C DE 848689C DE M2146 D DEM2146 D DE M2146D DE M0002146 D DEM0002146 D DE M0002146D DE 848689 C DE848689 C DE 848689C
Authority
DE
Germany
Prior art keywords
safety device
injection
compression molding
molding machines
piston
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
Application number
DEM2146D
Other languages
German (de)
Inventor
Gustav Lieby
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.)
Mahle GmbH
Original Assignee
Mahle GmbH
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 Mahle GmbH filed Critical Mahle GmbH
Priority to DEM2146D priority Critical patent/DE848689C/en
Application granted granted Critical
Publication of DE848689C publication Critical patent/DE848689C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft eine Sicherungsvorrichtung für durch Kolbendruck betätigte Spritz- oder Preßgießmaschinen, welche die Auslösung des Gießvorganges erst dann ermöglicht, wenn die Form geschlossen ist.The invention relates to a safety device for by piston pressure operated injection or compression molding machines, which trigger the casting process only made possible when the mold is closed.

Derartige Sicherungsvorrichtungen wurden bisher stets als Verriegelung für ein das Antriebsmittel des Gießkolbens steuerndes Schaltorgan vorgesehen. Dabei ist keine Gewähr dafür gegeben, daß eine unbeabsichtigte Auslösung des Gießvorganges durch Versagen des Schaltorgans, z. B. bei hydraulisch betriebenen Maschinen, durch Undichtwerden des Einlaßventils für das den Gießkolben antreibende Druckmittel nicht vorkommen kann.Such safety devices have always been used as a lock provided for a switching element controlling the drive means of the casting piston. Included there is no guarantee that the casting process will be triggered unintentionally by failure of the switching element, e.g. B. in hydraulically operated machines by The inlet valve for the pressure medium driving the casting piston does not leak can occur.

Gemäß der Erfindung wird dieser Mangel dadurch behoben, daß eine unmittelbar auf den Gießkolben einwirkende Verriegelung vorgesehen wird, die, z. B. durch ein mechanisches oder hydraulisches Gestänge, erst ausgelöst werden kann, wenn die Form geschlossen ist. Um gleichzeitig eine Sicherung dagegen zu erhalten, daß der Gießvorgang bei ungenügendem Formenschließdruck eingeleitet wird, kann die Anordnung vorteilhafterweise so getroffen werden, daß auf die Verriegelung ständig eine dem Auslösvorgang entgegenwirkende, vom Antriebssystem der Maschine unabhängige Kraft, die nur wenig kleiner ist als die Auslöskraft, z. B. die Kraft einer entsprechend bemessenen Feder, einwirkt.According to the invention, this deficiency is remedied in that one immediately acting on the casting piston locking is provided which, for. B. by a mechanical or hydraulic linkage, can only be triggered when the mold closed is. In order to simultaneously secure against the fact that the casting process is initiated when the mold clamping pressure is insufficient, the arrangement can advantageously be made in such a way that the locking mechanism is constantly counteracted by the release process, force independent of the machine's drive system, which is only slightly smaller than the release force, e.g. B. the force of an appropriately sized spring acts.

In der Zeichnung sind zwei Ausführungsbeispiele einer Sicherungsvorrichtung gemäß der Erfindung schematisch dargestellt.The drawing shows two exemplary embodiments of a safety device shown schematically according to the invention.

Abb. i zeigt eine Horizontalspritzgießmaschine, bei welcher die Verriegelung des Gießkolbens i durch ein auf der Deckplatte 2 des Ofens 3 entgegen der Kraft einer Feder .4 verschiebbares Abstandsstück 5 bewirkt wird, gegen dessen obere Stirnfläche sich ein am Schaft des Gießkolbens angeordneter Bund 6 anlegt. Die Feder .4 ist so bemessen, daß das Wegschieben des Abstandsstücks 5 mittels der am Träger der Auswerfform 7 befestigten Stange ä nur möglich ist, wenn der vom Arbeitskolben 9 ausgeübte Druck ein bestimmtes Mindestmaß erreicht hat.Fig. I shows a horizontal injection molding machine in which the lock of the casting piston i by a on the cover plate 2 of the furnace 3 against the force a spring .4 displaceable spacer 5 is effected against the upper end face a collar 6 arranged on the shank of the casting piston rests. The spring .4 is dimensioned so that the sliding away of the spacer 5 by means of the carrier on the Ejector 7 attached rod - is only possible if the piston 9 the pressure exerted has reached a certain minimum.

Abb. 2 zeigt eine Preßgießmaschine, bei welcher die Betätigung des Gießkolbens i bei nicht genügendem Formenschließdruck durch einen schwenkbaren Riegel io verhindert wird. Die Auslösung dieses Riegels erfolgt durch einen vom Antriebsmittel des die Auswerffortn 7 bewegenden Arbeitskolben 9 beaufschlagten Kolben i i entgegen der Kraft der FederFig. 2 shows a compression molding machine in which the actuation of the Casting piston i by means of a pivoting bolt if the mold clamping pressure is insufficient io is prevented. This bolt is triggered by one of the drive means of the working piston 9 which moves the ejector port 7, the piston i i is acted upon against it the force of the spring

Claims (2)

PATENTANSPRÜCHE: i. Sicherungsvorrichtung für durch Kolbendruck betätigte Spritz- oder Preßgießmaschinen, welche die Auslösung des Gießvorganges erst dann ermöglicht, wenn die Form geschlossen ist, dadurch gekennzeichnet, daß eine unmittelbar auf den Gießkolben einwirkende Verriegelung vorgesehen ist, die z. B. durch ein mechanisches oder hydraulisches Gestänge erst ausgelöst werden kann, wenn die Form geschlossen ist. PATENT CLAIMS: i. Safety device for injection or compression molding machines operated by piston pressure, which enables the casting process to be triggered only when the mold is closed, characterized in that a lock acting directly on the casting piston is provided which, for. B. can only be triggered by a mechanical or hydraulic linkage when the mold is closed. 2. Sicherungsvorrichtung nach Anspruch i, dadurch gekennzeichnet, daß auf die Verriegelung ständig eine dem Auslösvorgang entgegenwirkende Kraft, die nur wenig kleiner ist als die Auslöskraft, z. B. die Kraft einer entsprechend gespannten Feder, einwirkt.2. Safety device according to claim i, characterized characterized in that the locking is constantly counteracting the triggering process Force that is only slightly smaller than the release force, e.g. B. the power of a corresponding tensioned spring acts.
DEM2146D 1943-04-02 1943-04-02 Safety device for injection or compression molding machines operated by piston pressure Expired DE848689C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM2146D DE848689C (en) 1943-04-02 1943-04-02 Safety device for injection or compression molding machines operated by piston pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM2146D DE848689C (en) 1943-04-02 1943-04-02 Safety device for injection or compression molding machines operated by piston pressure

Publications (1)

Publication Number Publication Date
DE848689C true DE848689C (en) 1952-09-08

Family

ID=7291559

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM2146D Expired DE848689C (en) 1943-04-02 1943-04-02 Safety device for injection or compression molding machines operated by piston pressure

Country Status (1)

Country Link
DE (1) DE848689C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785448A (en) * 1954-06-29 1957-03-19 Hodler Fritz Apparatus for the automatic expulsion of air from the die-cavity of hot and cold chamber die-casting machines
DE1278248B (en) * 1958-08-19 1968-09-19 Carborundum Co Piston pump for pumping molten non-ferrous metals
FR2391795A1 (en) * 1977-05-28 1978-12-22 Buehler Ag Geb METHOD AND DEVICE FOR PROTECTING THE CASTING UNIT OF A CASTING MACHINE AGAINST ANY UNEXPECTED TRIGGERING OF THE CASTING OPERATION
FR2424780A1 (en) * 1977-12-01 1979-11-30 Dbm Industries Ltd MACHINE FOR INJECTION MOLDING

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785448A (en) * 1954-06-29 1957-03-19 Hodler Fritz Apparatus for the automatic expulsion of air from the die-cavity of hot and cold chamber die-casting machines
DE1278248B (en) * 1958-08-19 1968-09-19 Carborundum Co Piston pump for pumping molten non-ferrous metals
FR2391795A1 (en) * 1977-05-28 1978-12-22 Buehler Ag Geb METHOD AND DEVICE FOR PROTECTING THE CASTING UNIT OF A CASTING MACHINE AGAINST ANY UNEXPECTED TRIGGERING OF THE CASTING OPERATION
FR2424780A1 (en) * 1977-12-01 1979-11-30 Dbm Industries Ltd MACHINE FOR INJECTION MOLDING

Similar Documents

Publication Publication Date Title
DE3836725C1 (en)
DE1426740C3 (en) Reciprocating engine
DE19626831C1 (en) Door fastener with door piston acting upon driven shaft
DE848689C (en) Safety device for injection or compression molding machines operated by piston pressure
DE1739352U (en) ARRANGEMENT FOR COMPRESSED AIR CONTROL FOR PRESSING, PUNCHING OR. DGL.
DE852348C (en) Safety device for oil-hydraulic circuits, especially for ship engines
DE608733C (en) Safety device to prevent the simultaneous switching of several switches that are individually driven by compressed gas and not mechanically coupled to one another
DE4216581C2 (en) Door lock for the door of a laundry treatment machine
DE638238C (en) Changeover switch for a lifting device operated with the aid of a flowing means with control members arranged in pairs
DE865087C (en) Multi-way control valve
DE564530C (en) Method and device for securing automatically operating injection molding machines
DE1214963B (en) Three-way valve with two locking pieces and pressure medium drive, especially steam-water valve for record presses
AT93896B (en) Pasta press.
DE430094C (en) control
DE729733C (en) Device for achieving a constant switching speed in pneumatic actuators of electrical switches
DE1558258B1 (en) Device for controlling the pressure curve on the press-in part of cold chamber die casting machines
AT90825B (en) Device for reversing the direction of movement of machine parts operated without flywheels.
DE514813C (en) Safety device on rotating bottle handling machines, in particular filling and closing machines
AT224389B (en) Device for switching the fuel supply to an internal combustion engine
DE2044841A1 (en) Fuel injection pump for internal combustion engines
AT329737B (en) LIFTING DEVICE FOR THE CLOSING PLATE OF COMPRESSOR VALVES
DE850783C (en) Safety device for automatically working injection or press molding machines
DE304881C (en)
DE453418C (en) Hand control for diesel vehicle engines with self-steering needle or open nozzle
DE6913568U (en) DIRECTLY HYDRAULICALLY ACTUATED CLOSING NEEDLE IN NEEDLE CLOSING NOZZLES OF INJECTION MOLDING MACHINES FOR PROCESSING THERMOPLASTIC MASSES.