AT237882B - Pulling device for foils made of thermoplastic material - Google Patents

Pulling device for foils made of thermoplastic material

Info

Publication number
AT237882B
AT237882B AT68662A AT68662A AT237882B AT 237882 B AT237882 B AT 237882B AT 68662 A AT68662 A AT 68662A AT 68662 A AT68662 A AT 68662A AT 237882 B AT237882 B AT 237882B
Authority
AT
Austria
Prior art keywords
pulling device
thermoplastic material
shaft
lever arm
foils made
Prior art date
Application number
AT68662A
Other languages
German (de)
Inventor
Heinrich Pappert
Original Assignee
Heinrich Pappert
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
Priority claimed from DEP27094A external-priority patent/DE1164641B/en
Priority claimed from DE1961P0025703 external-priority patent/DE1228394B/en
Application filed by Heinrich Pappert filed Critical Heinrich Pappert
Application granted granted Critical
Publication of AT237882B publication Critical patent/AT237882B/en

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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/38—Opening, closing or clamping 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/261—Handling means, e.g. transfer means, feeding means
    • B29C51/262—Clamping means for the sheets, e.g. clamping frames
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/306—Moulds with means for forming a rim

Description

       

   <Desc/Clms Page number 1> 
 



  Ziehvorrichtung für Folien aus thermoplastischem Kunststoff 
 EMI1.1 
 

 <Desc/Clms Page number 2> 

 gelagert und wird durch eine Feder 63, die an einem ebenfalls mit dem Rohr 54 verbundenen Arm 64 angreift, in die Nut 60 gedrückt. Dadurch wird dem Schaft 53 in jeder Lage, in der er sich gerade befindet, gegen seine Aufwärtsbewegung ein äusserst grosser Widerstand entgegengesetzt, so dass es genügt, die Patrize nur einmal kurzzeitig in die Fertigziehstellung zu drücken, um sie automatisch in dieser Lage festzuhalten.

   Ein Emporheben des Bedienungshebels 56 und damit der Patrize 2 würde, solange die Reibungsarretierung wirksam ist, Kräfte erfordern, die die normale menschliche Muskelkraft übersteigt, so dass ein unbeabsichtigtes Heben der Patrize durch äussere Einflüsse mit Sicherheit ausgeschaltet ist und die Erhärtung des Formstückes unter dem gleichen Druck erfolgen kann, der vom Bedienungsmann kurzzeitig auf die Patrize 2 ausgeübt worden ist. 



   Dagegen bietet die Reibungsarretierung so gut wie gar keinen Widerstand gegen die Abwärtsbewegung des Schaftes 53, so dass die Betätigung des Hebels 56 keinen grösseren Kraftaufwand erfordert als ohne die   erfindungsgemässe Reibungsarretierung. Soll - z.   B. nach Erhärtung des Formstückes - die Patrize 2 wieder   angehoben werden, dann genügt ein   leichtes Anheben des Sperrhebels 61 in der Richtung des Pfeiles A, um die Arretierung auszuschalten, so dass der Bedienungshebel 56 wieder gehoben werden kann. Gegebenenfalls kann das Anheben des Bedienungshebels 56 nach Ausschaltung der Arretierung auch selbsttätig erfolgen, beispielsweise durch eine Zugfeder 65 oder ein Gegengewicht, wobei die Zugfeder zwischen dem Bedienungshebel 56 und einem darüber befindlichen Punkt des Gerüstes 50 gespannt ist. 



    PATENTANSPRÜCHE :    
1. Ziehvorrichtung für Folien aus thermoplastischem Kunststoff, bestehend aus zwei gegeneinander verschiebbaren Formteilen, von denen einer an einem Schaft befestigt ist, der in einem mit dem den   an-   dernFormteil tragenden Gerüst fest verbundenen Rohr mittels eines Hebels auf- und abwärts bewegbar ist, wobei für den beweglichen Formteil in Fertigziehstellung eine Verriegelung vorgesehen ist, gekennzeichnetdurch eine auf den Schaft (53) einwirkende Reibungsarretierung (60,61, 63), die ausschliesslich gegen die Aufwärtsbewegung des Schaftes (53) wirksam ist.



   <Desc / Clms Page number 1>
 



  Pulling device for foils made of thermoplastic material
 EMI1.1
 

 <Desc / Clms Page number 2>

 and is pressed into the groove 60 by a spring 63 which engages an arm 64 which is also connected to the tube 54. As a result, the shaft 53 is opposed to its upward movement in every position in which it is currently located, so that it is sufficient to press the male part only once briefly into the finished position in order to hold it automatically in this position.

   Raising the operating lever 56 and thus the male mold 2 would, as long as the friction lock is effective, require forces that exceed normal human muscle strength, so that unintentional lifting of the male mold by external influences is definitely eliminated and the hardening of the molded part under the same Pressure that has been briefly exerted on the male mold 2 by the operator can take place.



   On the other hand, the friction lock offers virtually no resistance to the downward movement of the shaft 53, so that the actuation of the lever 56 does not require a greater expenditure of force than without the friction lock according to the invention. Should - z. B. after hardening of the molding - the male mold 2 is raised again, then a slight lifting of the locking lever 61 in the direction of arrow A is sufficient to switch off the lock so that the operating lever 56 can be raised again. If necessary, the operating lever 56 can also be raised automatically after the lock has been disengaged, for example by a tension spring 65 or a counterweight, the tension spring being tensioned between the operating lever 56 and a point on the frame 50 located above it.



    PATENT CLAIMS:
1. Pulling device for foils made of thermoplastic material, consisting of two mutually displaceable molded parts, one of which is attached to a shaft which can be moved up and down by means of a lever in a tube that is firmly connected to the other molded part a lock is provided for the movable molded part in the finished position, characterized by a friction lock (60, 61, 63) acting on the shaft (53) and acting exclusively against the upward movement of the shaft (53).

Claims (1)

2. Ziehvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Reibungsarretierung einen ortsfest gelagerten zweiarmigen Hebel (61) besitzt, dessen vorzugsweise kürzerer Hebelarm in eine Längsnut (60) des Schaftes (53) senkrecht zu diesem gerichtet eingreift, wobei auf seinen äusseren, vorzugsweise längeren Hebelarm eine Feder (63) einwirkt, welche den kürzeren Hebelarm in die Nut (60) drückt. 2. Pulling device according to claim 1, characterized in that the friction lock has a fixedly mounted two-armed lever (61), the preferably shorter lever arm of which engages in a longitudinal groove (60) of the shaft (53) directed perpendicular to this, with on its outer, preferably longer lever arm acts a spring (63) which presses the shorter lever arm into the groove (60). 3. Ziehvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Ende des in die Nut (60) eingreifenden Hebelarmes (61) kantig, zugespitzt oder aufgerauht ist. 3. Pulling device according to claim 1 or 2, characterized in that the end of the lever arm (61) engaging in the groove (60) is angular, pointed or roughened. 4. Ziehvorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der Schaft (53) mit einem Schlitz (55) versehen ist, durch den der Bedienungshebel (56) hindurchgeführt ist. 4. Pulling device according to claim 1, 2 or 3, characterized in that the shaft (53) is provided with a slot (55) through which the operating lever (56) is passed.
AT68662A 1961-05-03 1962-01-26 Pulling device for foils made of thermoplastic material AT237882B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP27094A DE1164641B (en) 1961-05-03 1961-05-03 Device for drawing hollow bodies from sheets of thermoplastic material
DE1961P0025703 DE1228394B (en) 1961-05-03 1961-05-03 Device intended for the two-stage mechanical drawing of hollow bodies made of thermoplastic material

Publications (1)

Publication Number Publication Date
AT237882B true AT237882B (en) 1965-01-11

Family

ID=25990001

Family Applications (1)

Application Number Title Priority Date Filing Date
AT68662A AT237882B (en) 1961-05-03 1962-01-26 Pulling device for foils made of thermoplastic material

Country Status (3)

Country Link
AT (1) AT237882B (en)
FR (1) FR1307368A (en)
GB (1) GB953692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295168A (en) * 1965-06-16 1967-01-03 John A Gale Sheet press device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2828831B1 (en) * 2001-08-23 2006-11-24 Erca Formseal METHOD AND INSTALLATION FOR THERMOFORMING OBJECTS SUCH AS CONTAINERS
FR3049211B1 (en) * 2016-03-24 2018-03-23 Emerging Industry REFILLING MACHINE AND REFILLING METHOD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295168A (en) * 1965-06-16 1967-01-03 John A Gale Sheet press device

Also Published As

Publication number Publication date
GB953692A (en) 1964-03-25
FR1307368A (en) 1962-10-26

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