DK173155B1

DK173155B1 - Method for the manufacture of a handled container

Info

Publication number: DK173155B1
Application number: DK66287A
Authority: DK
Inventors: Erik Bock
Original assignee: Erik Bock
Priority date: 1986-02-25
Filing date: 1987-02-10
Publication date: 2000-02-14
Also published as: DK66287A; DK66287D0; GB8604661D0

Description

i DK 173155 Blin DK 173155 Bl

Opfindelsen angår en fremgangsmåde af den art, der er angivet i krav l's indledning.The invention relates to a method of the kind set forth in the preamble of claim 1.

Beholderlegemer af fleksibel, elastisk plast formes 5 sædvanligvis til den ønskede form i en enkelt formningsoperation, f.eks. Ved sprøjtestøbning eller blæsestøbning.Container bodies of flexible, resilient plastic are usually formed into the desired shape in a single forming operation, e.g. For injection molding or blow molding.

Hvis beholderlegemet skal forsynes med hank, støbes det sædvanligvis med hankeophæng hvorpå hanken kan fastgøres.If the container body is to be provided with a handle, it is usually molded with handles to which the handle can be attached.

Dette nødvendiggør en mere kompliceret udformning af 10 støbeformen samtidig med at det øger cyklustiden.This necessitates a more complicated design of the mold while increasing the cycle time.

Det er formålet med opfindelsen at angive en fremgangsmåde til fremstilling af en beholder med hank, hvor det er muligt at nedsætte processens cyklustid og derved opnå en bedre udnyttelse af støbeanlægget.SUMMARY OF THE INVENTION It is an object of the invention to provide a method of making a container with a handle where it is possible to reduce the cycle time of the process and thereby achieve a better utilization of the casting plant.

15 Formålet opnås ved at udøve den indledningsvis nævnte fremgangsmåde som angivet i krav l's kendetegnende del.The object is achieved by practicing the method mentioned in the preamble as set out in the characterizing part of claim 1.

Når der anvendes et elastisk plastmateriale, såsom polypropylen eller et lignende materiale, er det ifølge 20 opfindelsen muligt at koldforme hankeophæng på beholderen, efter at denne er udkastet af formen. Ved hjælp af denne efterformningsoperation er det muligt at forøge støbehastigheden og derved opnå en bedre udnyttelse af de store investeringer til støbemaskiner og forme.When an elastic plastic material such as polypropylene or a similar material is used, according to the invention it is possible to cold-form hangers on the container after it has been ejected from the mold. By means of this post-molding operation, it is possible to increase the casting speed and thereby make better use of the large investments for molding machines and molds.

25 Et apparat til opnåelse af disse fordele indbefat ter et pneumatisk drevet stempel, der er bevægeligt koncentrisk i en matrice, fortrinsvis med en fjederbelastet bund. Diameteren af matricen er lidt større end diameteren af stemplet. Forskellen i diameter bestemmer 30 vægtykkelsen af indtrykningen, der skal fastholde hanken. Vægtykkelsen i bunden af indtrykningen kan varieres ved ændring af fjederspændingen på matricens bund. Hvis en ' tyndere bund i indtrykningen kan tillades, er der mere materiale til rådighed til sidevæggen af indtrykningen, 35 som derfor kan gøres dybere uden risiko for at den revner.An apparatus for achieving these advantages includes a pneumatically driven piston which is movably concentric in a die, preferably with a spring-loaded bottom. The diameter of the die is slightly larger than the diameter of the piston. The difference in diameter determines the wall thickness of the impression to hold the handle. The wall thickness at the bottom of the impression can be varied by changing the spring tension on the bottom of the die. If a thinner bottom of the impression can be allowed, more material is available to the sidewall of the impression, which can therefore be made deeper without the risk of it cracking.

DK 173155 Bl 2DK 173155 Pg 2

Et udvidet hoved på hankens lejringstappe kan ekspandere vaggene i indtrykningen inden for beholderens sidevæg, hvis indtrykningens vægge er tilstrækkeligt tynde. Herved vil hanken forme et modslip, der kan fast-5 holde den drejelig vinkelret på beholderens akse.An enlarged head on the bearing pin of the handle can expand the cradles of the impression within the side wall of the container if the walls of the impression are sufficiently thin. Hereby, the handle will form a counter-slip which can hold the pivot perpendicular to the axis of the container.

Hanken kan dog aftages og genindsættes i indtrykningen hvis ønsket.However, the handle can be removed and reinserted if desired.

Indtrykningen kan ske overalt på beholderen, men foretages fortrinsvis i to diametralt modstående punkter.The impression can be made anywhere on the container, but is preferably made at two diametrically opposed points.

10 I det følgende beskrives ved hjælp af et eksempel en udførelsesform for fremgangsmåden ifølge opfindelsen under henvisning til tegningen, hvor fig. 1 set fra siden og delvis i snit viser et apparat til efterformning af hanhoptagende recesser i en 15 plastbeholder, fig. 2 i større målestok viser dele af det i fig. 1 viste efter formning af en reces, fig. 3 i større målestok viser et i en reces drejeligt lejret fremspring på en hank, og 20 fig. 4 delvis i snit viser en beholder med påsat hank.10 An exemplary embodiment of the method according to the invention will now be described by way of example with reference to the accompanying drawings, in which: FIG. 1 is a side view, partly in section, of an apparatus for shaping male picking recesses in a plastic container; FIG. 2 shows on a larger scale parts of the embodiment of FIG. 1 after forming a recess; FIG. 3 shows on a larger scale a projection which is pivotally mounted in a recess, and FIG. 4 partly in section shows a container with attached handle.

Fig. 1 viser en plastbeholder 50 placeret i det værktøj, der kan forme indtrykningerne. Stemplerne 55 bevæges ved hjælp af luftcylindre (er ikke vist) frem mod 25 beholderens væg og ind i matricen 51 med den bevægelige bund 52. Denne er belastet af fjederen 53, der ligger an mod et fast anlæg 54.FIG. 1 shows a plastic container 50 located in the tool capable of forming the impressions. The pistons 55 are moved by air cylinders (not shown) towards the wall of the container and into the die 51 with the movable bottom 52. This is loaded by the spring 53 which abuts a fixed abutment 54.

Fig. 2 viser en detalje af beholderen 50 med stemplet 55 med kugleformet hoved 56 i sin bundstilling.FIG. 2 shows a detail of the container 50 with the plunger 55 with spherical head 56 in its bottom position.

30 Matricen 51 understøtter beholderen 50 på indersiden, og matricens bevægelige bund 52 er presset tilbage af stemplet, hvorved der er formet en indtrykning med en mindre vægtykkelse end beholderens oprindelige vægtykkelse .The die 51 supports the container 50 on the inside and the movable bottom 52 of the die is pushed back by the plunger, thereby forming an impression with a smaller wall thickness than the original wall thickness of the container.

35 Fig. 3 viser en detalje af beholderen 50 med en hank 57 monteret i indtrykningen. Hankens lejringstap 58 # DK 173155 B1 3 ender i et hoved 59 med en diameter lidt større end indtrykningen. Ved montagen udvides indtrykningen som vist, og danner et modslip, der fastholder hanken.FIG. 3 shows a detail of the container 50 with a handle 57 mounted in the impression. The bearing pin 58 # DK 173155 B1 3 ends in a head 59 with a diameter slightly larger than the impression. During assembly, the impression expands as shown, forming a counter slip that holds the handle.

Figur 4 Viser hele beholderen 50 med hanken 57 5 monteret. Hanken kan drejes om lej ringstappen 58 og fastholdes af hovedet 59.Figure 4 Shows the entire container 50 with the handle 57 5 mounted. The handle may be rotated about the bearing pin 58 and retained by the head 59.

10 15 20 25 30 3510 15 20 25 30 35

Claims

A method of manufacturing a container and handle combination characterized in that a container body of a flexible, resilient plastic material is cold-formed and stretched so as to form two permanent, preferably opposite hollow recesses in the container wall, designed to hold a handle, holding the handle bearing pins have oversized heads so that when mounted on the container they expand the hollow recesses, thereby holding the handle on the container.

Process for producing a container according to claim 1, characterized in that matrices on the inside of the container and mandrels on the outside of the container are preferably diametrically opposed to each other, forming the hollow recesses by pressing the mandrels against the container side and deforming and extending an area within the container. matrices.

Method for making a container according to claim 2, characterized in that the dies and mandrels are placed perpendicular to the side of the container. 25

Method for making a container according to claim 2 or 3, characterized in that the recesses are formed with a wall thickness less than the wall thickness of the container. 30

Process for making a container according to claim 2, 3 or 4, characterized in that the mandrel has a hemispherical end which is pressed into a cylindrical die with movable bottom which can follow the mandrel during the pressing.