DE2055145A1 - Plastic-coating pliable strip - on both sides by injection moulding - Google Patents
Plastic-coating pliable strip - on both sides by injection mouldingInfo
- Publication number
- DE2055145A1 DE2055145A1 DE19702055145 DE2055145A DE2055145A1 DE 2055145 A1 DE2055145 A1 DE 2055145A1 DE 19702055145 DE19702055145 DE 19702055145 DE 2055145 A DE2055145 A DE 2055145A DE 2055145 A1 DE2055145 A1 DE 2055145A1
- Authority
- DE
- Germany
- Prior art keywords
- plastic
- injection molding
- coating
- mold
- halves
- 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.)
- Pending
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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C45/14073—Positioning or centering articles in the mould using means being retractable during injection
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C45/14073—Positioning or centering articles in the mould using means being retractable during injection
- B29C2045/14081—Positioning or centering articles in the mould using means being retractable during injection centering means retracted by the injection pressure
-
- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1787—Mould parts driven by pressure of injected material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Spritzgießvorriohtung Die Erfindung betrifft eine Vorrichtung zum beidseitigen Beschichten eines biegeschlaffen Bandes mit kunststoff. Spritzgießvorriohtung The invention relates to a device for Coating of a pliable belt on both sides with plastic.
In vielen Fällen, insbesondere auch in der Reißverschlußtechnik besteht das Bedürfnis, ein biegeschlaffes Band auf beiden Seiten ganz oder nur stellenweise mit Kunststoff zu beschichten oder auch nur die Randkante des Ban des allseitig mit Kunststoff zu umgeben. Hierbei iBt es schwierig. das biegeschlaffe Band in der Spritsgießform zu fixieren, 0. SU verhindern, daß das Band bei der unter Druck erfolgenden Einleiten der knststoff-Spritsgießmasse nach der Seite des geringeren Druckes abweicht, was eine ungleichaUige Verteilung der Spritzgießmasse ino nerhalb der Form zur Folge hat, so daß ein Teil der Oberfläche des Bandes unter Umständen nicht mit Spritzgießmasse oder nicht in der gewtlnschten Stärke mit Spritzgießwasso Ubersogen wird.In many cases, especially in the zip fastener technology the need to have a slack band on both sides entirely or only in places to be coated with plastic or just the edge of the strip on all sides surrounded with plastic. Here it is difficult. the limp To fix tape in the injection mold, 0. SU prevent the tape from being underneath The plastic injection molding compound is introduced under pressure to the side of the lesser Pressure deviates, which results in an uneven distribution of the injection molding compound within the shape, so that part of the surface of the belt may not with injection molding compound or not in the desired strength with injection molding water Is oversaturated.
Um eine solche ungleichmäßige Beschichtung eines biegeschlaffen bundes mit Kunststoff zu vermeiden, wird geuU der Erfindung vorgesohlagen. die Spritzgießform so auszubilden, daß zum Festhalten des Bandes in der Bor in Jeder der beiden Formhälften die Formhohlräume durchsetzende Bolzen vorgesehen sind, die an unter der Einwirkung von Federn stehenden Druckplatten angeordnet sind, mit denen mindestens Je ein Kolben verbunden ist, der in einem mit dem Gießkanal in Verbindung stehenden Zylinder unter dem Druck der seins Stirnfläohe beaufschlagenden Spritzgießmas-Be verschiebbar angeordnet ist.To such an uneven coating of a limp band Avoid using plastic, according to the invention, pre-soles. the injection mold to be trained so that to hold the tape in the boron in each of the two mold halves the mold cavities penetrating bolts are provided, which on under the action of springs standing pressure plates are arranged, with which at least one piston each is connected, which is below in a cylinder communicating with the casting channel The pressure of the injection molding machine acting on his face is arranged to be displaceable is.
Die den Kolben und die Bolsen tragende Druckplatte und die auf diese einwirkenden Federn sind vorteilhafterweise in Aussparungen des die Form aufnehmenden Vorrichtungsuantels angeordnet. Die Form ist desweiteren vorteilhafterweise so ausgebildet, daß zlum gleichzeitigen Beschichten mehrere Tragbänder in die Form eingebracht werden können.The pressure plate carrying the piston and the bolt and the on these acting springs are advantageously in recesses of the shape receiving Device shell arranged. The shape is also advantageously designed so that that several carrier tapes are introduced into the mold for simultaneous coating can.
In der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung in schematischer Weise dargestellt, deren Funktion im folgenden anhand der Zeichnung erläutert wird. Es zeigen Fig. 1 einen senkrechten Schnitt durch die erfindungegemäße Gießvorrichtung, wobei in der rechten Hälfte der Figur die Lage der Halteelemente vor dem Einleiten der Spritsgießuasse und in der linden Hälfte die Lage der Halteelemente nach dem Einleiten der Spritzgießmasse gezeigt ist; Fig. 2 einen senkrechten Schnitt durch die Torrichtunp; nach der Schnittlinie II - II der Fig. 1; Fig. 3 einen waagerechten Schnitt durch die Vorrichtung @@@ der Schnittl@ ie @IJ - II@ der Fig. 1.In the drawing is an embodiment of the invention Device shown in a schematic manner, the function of which is based on the following the drawing is explained. 1 shows a vertical section through the according to the invention casting device, the position in the right half of the figure the holding elements before the injection molding and in the linden half the position of the holding elements is shown after the injection molding compound has been introduced; Fig. 2 a vertical section through the Torrichtunp; after the section line II - II of Fig. 1; Fig. 3 shows a horizontal section through the device @@@ the section @ ie @IJ - II @ of Fig. 1.
Die beiden Foruhälften 1 und 2 nehmen in Vertiefungen der beiden gegeneinander anliegenden Flächen die biegeschlaffen Bänder 3 und 4 auf. In den beiden Formhälften sind Bohrungen zur Aufnahme der haltebolsen 5 und 6 sowie der Kolben 7 vorgesehen. Diese Kolben und Bolgen sind alt Je einer druckplatte 8 verbunden, auf die eine Schraubeufeder 9 einwirkt, die in einer Aussparung des die Form 1 aufnchmenden Mantels 10 der Vorrichtung gehalten ist. Zwisohen den beiden Kolben 7 ist ein etwas größerer Swischenraum 11 vorgesehsn, der in Verbindung mit dem Gießkanal 12 steht. Dringt in diesen und gleichzeitig in die Formbohlräume 13 und 14 Spritagießmasse unter Druok ein, so werden die Kolben 7 entgegen der Rückstellkraft der Federn 9 auseinandergetrieben, so daß die Haltebolzen 5 und 6 von den Bändern 3 und 4 abgchoben werden. Die Forchohlräume 13 and 14 werden auf diese Weise in dem Maße mit Spritsgieß-@asse erfüllt, als die Bolsen 5 und 6 aus den Formhohlräusen zurückgezogen werden. AS diese Weise ist eine gleiohmäßige Beschiohtung bzw. U@mantelung der su umspritsenden Bänder gewährleistet.The two halves of the foru 1 and 2 take in depressions of the two against each other adjacent surfaces the slack strips 3 and 4. In the two halves of the mold bores for receiving the retaining bolts 5 and 6 and the piston 7 are provided. These pistons and bolts are each connected to a pressure plate 8 on which one Helical spring 9 acts in a recess of the shell 1 accommodating the mold 10 of the device is held. Between the two pistons 7 is a slightly larger one Swish space 11 which is in connection with the pouring channel 12. Urges in this and at the same time in the mold cavities 13 and 14 under injection molding compound Druok on, the pistons 7 are driven apart against the restoring force of the springs 9, so that the retaining bolts 5 and 6 are pushed off the belts 3 and 4. The forch cavities 13 and 14 are in this way fulfilled with injection molding @asse to the same extent as the Bolsen 5 and 6 are withdrawn from the mold cavity. AS this way is a Uniform coating and / or sheathing of the straps that are encapsulated are guaranteed.
Wis aus Fig. 3 ersiohtlich ist, wird die Spritsgießmasse vom Gießkanal 12 jeweils über eine besondere Düss in den zylindrischen Hohlrad 11 und die Formhohlräume 13 und 14 eingeleitet.Wis from Fig. 3 can be seen, the injection molding compound is from the pouring channel 12 each have a special Düss in the cylindrical ring gear 11 and the mold cavities 13 and 14 initiated.
Die Vorrichtung eignet sich in besonderer Weise zum Umspritzen der Enden eines Reißverschlußtragbandes aowie zur Bildung von Endteilen von völlig trennbaren Reißverschlüssen.The device is particularly suitable for encapsulating the Ends of a zip fastener tape as well as to form end portions of fully separable ones Zippers.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702055145 DE2055145A1 (en) | 1970-11-10 | 1970-11-10 | Plastic-coating pliable strip - on both sides by injection moulding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702055145 DE2055145A1 (en) | 1970-11-10 | 1970-11-10 | Plastic-coating pliable strip - on both sides by injection moulding |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2055145A1 true DE2055145A1 (en) | 1972-05-31 |
Family
ID=5787631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19702055145 Pending DE2055145A1 (en) | 1970-11-10 | 1970-11-10 | Plastic-coating pliable strip - on both sides by injection moulding |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2055145A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2523687A1 (en) * | 1974-05-28 | 1975-12-18 | Airfix Ind Ltd | METHOD AND APPARATUS FOR MANUFACTURING A COMPOSITE CONTAINER |
DE2751302A1 (en) * | 1976-11-17 | 1978-05-24 | Yoshida Kogyo Kk | MANUAL INJECTION MOLDING MACHINE |
FR2585617A1 (en) * | 1985-08-05 | 1987-02-06 | Waelzlager Normteile Veb | Process and device for injection coating thin-walled metal components |
DE4228585A1 (en) * | 1992-08-27 | 1994-03-03 | Peguform Werke Gmbh | Film hinge mfr. in plastic component - involves aligning and clamping hinge of new material in tool and injecting polymer from both sides to fuse with hinge |
DE19624075A1 (en) * | 1996-06-17 | 1997-12-18 | Bayerische Motoren Werke Ag | Manufacturing method for airbag system support piece |
-
1970
- 1970-11-10 DE DE19702055145 patent/DE2055145A1/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2523687A1 (en) * | 1974-05-28 | 1975-12-18 | Airfix Ind Ltd | METHOD AND APPARATUS FOR MANUFACTURING A COMPOSITE CONTAINER |
DE2751302A1 (en) * | 1976-11-17 | 1978-05-24 | Yoshida Kogyo Kk | MANUAL INJECTION MOLDING MACHINE |
FR2585617A1 (en) * | 1985-08-05 | 1987-02-06 | Waelzlager Normteile Veb | Process and device for injection coating thin-walled metal components |
DE4228585A1 (en) * | 1992-08-27 | 1994-03-03 | Peguform Werke Gmbh | Film hinge mfr. in plastic component - involves aligning and clamping hinge of new material in tool and injecting polymer from both sides to fuse with hinge |
DE19624075A1 (en) * | 1996-06-17 | 1997-12-18 | Bayerische Motoren Werke Ag | Manufacturing method for airbag system support piece |
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