EP0217879A1 - Recipient en plastique avec arete profilee et son procede de fabrication - Google Patents

Recipient en plastique avec arete profilee et son procede de fabrication

Info

Publication number
EP0217879A1
EP0217879A1 EP19860902295 EP86902295A EP0217879A1 EP 0217879 A1 EP0217879 A1 EP 0217879A1 EP 19860902295 EP19860902295 EP 19860902295 EP 86902295 A EP86902295 A EP 86902295A EP 0217879 A1 EP0217879 A1 EP 0217879A1
Authority
EP
European Patent Office
Prior art keywords
container
profile
edge
plastic
edges
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.)
Withdrawn
Application number
EP19860902295
Other languages
German (de)
English (en)
Inventor
Josef Kuhn
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.)
Leica Geosystems AG
Original Assignee
Wild Heerbrugg AG
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 Wild Heerbrugg AG filed Critical Wild Heerbrugg AG
Publication of EP0217879A1 publication Critical patent/EP0217879A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0209—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together stackable or joined together one-upon-the-other in the upright or upside-down position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/40—Details of walls
    • B65D1/42—Reinforcing or strengthening parts or members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/107—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
    • B65D81/113—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material of a shape specially adapted to accommodate contents

Definitions

  • the invention relates to a plastic container with at least one bead-like profile running along a container edge, according to the preamble of claim 1, and a method for its production.
  • plastic bodies of this type are produced by injection molding, deep-drawing or blowing.
  • the well-known injection molding process is generally used for large series. In addition to an injection molding machine, this process requires corresponding molding tools which, because of the high deformation pressures used in the injection molding process, must consist of high-quality and therefore expensive materials.
  • the associated high investments in the form require correspondingly high quantities in production so that the product can be manufactured at competitive prices.
  • a bead made of the same material to reinforce the edges of such plastic containers.
  • the bead is intended primarily to reinforce the shape of the body at the point in question.
  • the bead can also be designed as a grip element or as a pouring edge.
  • Known multi-part plastic containers also occasionally have bead-like edge reinforcements open outwards at the edges. Outward-facing ribs, however, are in closed containers, e.g. consist of base and lid part, undesirable, since they pose a risk of injury and also promote the deposition of dirt.
  • edge reinforcement of the same material on the edges of known multi-part, composite containers manufactured by the injection molding process in particular if they are provided with a seal for hermetically sealing the container against the effects of moisture or pressure, leads to a further increase in weight, since in particular in the case of heavily loaded containers Edges must have the necessary dimensional stability.
  • the weight of the container must be in both Particular attention should be paid to the lowest possible material consumption during manufacture and to the manageability of the finished containers.
  • multi-part hollow bodies e.g. consist of a base and a cover part and are connected to each other to form a commodity, at the contact or connection edges with non-material reinforcements, e.g. with profiled aluminum strips.
  • non-material reinforcements e.g. with profiled aluminum strips.
  • reinforcements are complex and involve several individual steps in the manufacture. There is also a risk that they will be easily damaged.
  • the object of the present invention is to improve plastic containers of the type mentioned in such a way that simple and effective edge reinforcements of the same material are provided, which do not protrude outwards and which can also be produced in small series with reasonable effort, so that technically high-quality plastic containers a wide variety of designs and shapes can actually be manufactured in line with the market.
  • This object is achieved according to the invention by the features defined in claim 1.
  • This measure also enables the economically sensible production of containers in small to medium series, which are provided with profile edges drawn inwards, even if the side walls are tapered towards the edge opening.
  • the applicability and quality of plastic containers can be decisively expanded or improved, so that small series for various applications can only be manufactured under conditions that are in line with the market.
  • the inwardly drawn edge bead proves to be particularly advantageous as a holder for inserts, in particular for shock-absorbing inserts for receiving shock-sensitive components, devices or instruments.
  • the rotary melting process also called the sintering process, and the GRP spraying or hand laying process are particularly suitable for producing such plastic containers.
  • the use of these processes results in a surprisingly simple way of producing edge-reinforced containers for small to medium-sized series of plastic containers. This also results in the possibility of being able to produce multi-part composite containers with competitive effort.
  • 3 shows the example of a counterbead for a seal
  • 4 shows the basic illustration of assembled containers, according to a first example
  • Fig. 5 consisting of a base and cover part
  • Fig. 6 shows a modified example with multi-part shock absorbing means.
  • FIG. 1 shows, as a preferred exemplary embodiment, a closed hollow body 1 made of thermoplastic material according to the rotary melting method.
  • the side walls 2 of the body can be inclined inward by an angle beta with respect to the perpendicular 3 to the floor 4. Deviating from this representation, the walls can also be perpendicular to the floor or, as the dash-dotted line 5 indicates, can be inclined outwards by an angle alpha.
  • the sintering or rotary melting technique which is preferably used and will be described in more detail later, permits a largely arbitrary wall guidance, be it with a positive one. Angle alpha according to position 5, or with negative angle beta according to position 2.
  • the left and right or the front and rear side walls can also be oriented differently to one another.
  • the closed hollow body 1 has an upper cover closure 6, which is separated from the side walls 2 by an inner bead 7 running in the circumferential direction.
  • the bead 7 itself is U-shaped here, one of the U-legs consisting of the side wall 2.
  • the bead 7 merges with the manufacturing process from the lower edge of its inner U-leg into the lid end 6.
  • the lid end 6 is later separated from the rest of the body along a cutting line 8 running parallel to the bead 7. This creates an open channel-like profile on the inside of the body.
  • the double-angled bead-like profile 7 shown here represents only one of many possible configurations.
  • the inner width 9 of the profile, between the profile beak 10 and the inner wall of the body 1, can be selected to be of different widths.
  • the profile also has to perform a reinforcement task, for example for a container formed from the body 1, there is a particularly good reinforcement effect if the web between the profile legs is not chosen too narrow.
  • the length of the profile beak 10 depends on the function intended for it.
  • the desired design of the shape for the container body 1, depending on the intended use, depends on the feasibility of the molding tool and the plastic processing system available.
  • the sintering or rotary melting method is particularly well suited for the production of such container parts.
  • measured quantities of polyethylene as PE granulate or powder are melted or polymerized onto the inner wall of a rotating, heated hollow mold.
  • the plastic powder introduced melts and is distributed evenly over the inner surface of the mold.
  • the speed of rotation of the mold is lower than in centrifugal casting, so that practically no centrifugal forces occur on the molten material.
  • the melted artificial fabric powder practically does not move in shape.
  • the rotating mold is heated from the outside by hot air, salt melt or hot oil.
  • the mold is fed from the heating station to a cooling station. After cooling, the mold with the product in it is fed to another processing station. There the product is removed from the mold. The mold is then filled again with plastic powder and returned to the heating station.
  • the resulting products have a molecular orientation so that they are free from internal stresses. The cost of the required molds can be kept particularly low compared to blowing or injection tools.
  • the wall thickness of the body 1 in the example can be determined by two parameters, namely by the amount of plastic introduced and by the calorific value of the molding tool. Shaped bodies with wall thicknesses of approximately 2 to 20 mm can be produced using this process. A multi-layer wall structure or sandwich can also be realized.
  • the mechanical properties of the bead-like profile 7 can be precisely determined.
  • Particularly good rigidity for the upper edge of the container can be achieved by a profile 7 with an internal web width 9 that is not too small.
  • the web width 9 is preferably in the range between twice to five times the wall thickness of the container.
  • a slightly trapezoidal arrangement of the two profile legs can also be advantageous.
  • a groove 20 can be provided in the upper region of the profile 7 attached to the container wall 2, into which a seal 16 can later be inserted.
  • the containers can also be produced using the GRP spraying or hand-laying process. These processes are particularly suitable for very small quantities.
  • the bead-like profile 7 on the container edge is particularly effectively reinforced by the design according to FIG. 2, so that it is possible to use their design to provide two container parts with this design Edges to be clamped against each other with the interposition of suitable sealants in such a way that the interior of the container is hermetically sealed against external influences such as moisture or pressure changes.
  • two-part or multi-part cases for components, devices or instruments can be produced, which are extraordinarily impact-resistant when using one of the preferred production methods mentioned and can be hermetically sealed by the described design of the edge profile. It is possible, for example, to produce suitcases which consist of a base part and a cover part which are connected to one another by hinges and corresponding locks. To protect sensitive devices, the case shape can be designed without difficulty in view of the respective application-related requirements.
  • the costs for the corresponding production molds are far less significant in the case of the two production processes considered than in the case of conventionally selected processes, for example the particularly complex injection molding process.
  • a relatively sharp protruding pressure edge 17 serves to ensure a perfect seal against container edges, which are designed according to FIG. 2 and which have a groove 20 with an inserted seal 16.
  • Fig. 4 shows an embodiment for plastic containers 1, which are designed as stackable containers.
  • the container can be formed on the body 1 according to the sintering process by opening the lid closure 6 along the section line 8.
  • the bead 7 is designed according to the purpose.
  • the profile beak 10 is advantageously shaped as a conical leading edge.
  • the container base 4 has an indentation 11 on the outermost circumferential edge, which corresponds in terms of shape at least approximately to the profile 7, but with a corresponding dimension allowance which enables the bodies 1 to be stacked.
  • the container part 1 has a corresponding depth depending on the purpose.
  • a second container part 12 is designed as a lid with a correspondingly smaller bottom depth. Together, the two parts form, for example, a carrying case or a transport box.
  • the inner edge of the profile 7 attached to the container part 1 or 12 serves as a limitation and support or fixation for an installation, e.g. Lining to be used in the interior of the container, for receiving and securing the respective goods to be transported.
  • the lining shown in FIG. 5 contains a receiving part 14 which, like a die, is adapted to the outer shape of the part to be transported.
  • the receiving part 14 is provided with a recess 13 and preferably consists of an elastic, e.g. resilient plastic material, so that a certain yielding is ensured to avoid damage to the transported goods when exposed to external impact forces.
  • the receiving part 14 has cavities 15 in the border area to the container bottom 4 and / or to the side walls 2 provided, whereby the receiving part is softer in these areas than in the rest of the area.
  • the goods to be protected are held securely on the one hand by the receiving part 14 and yet are resiliently elastic, and on the other hand the receiving part 14 is again resiliently supported with respect to the container.
  • a further plastic insert 19 can also be provided between the receiving part 14 and the container bottom 4 and / or the side walls, which is of a different spring-elastic or shock-absorbing quality than the material of the receiving part 14. Materials can also be used with different suspension or damping behavior compared to the floor or side walls. Furthermore, the plastic insert 19 can be designed as a film that can be inserted or glued in. As a result of this measure, the receiving part 14, and with it the goods to be protected, are floatingly supported and, accordingly, are to a great extent protected against external forces.
  • the counterpart that is to say the profile in the cover part 12 of the container, is preferably provided with a pronounced pressure edge 17 according to FIG. 3.
  • the pressure edge 17 is preferably designed such that it is pressed through the cover 12 into the seal 16 when the container is closed, as a result of which absolute tightness is established between the two container parts and the container interior is hermetically sealed.
  • Both the groove 20 for receiving the seal 16 and the pressure edge 17 can be produced particularly well and simply using the production processes mentioned, in particular in the sintering process.
  • the lid 12 can also be lined on the inside. In the example shown, this is only supplemented with a plastic insert 18, which is held clampable by the edge of the profile 7. In this example, too, the same lining technique as for container part 1 can be used. This will always be the case when certain parts of the device to be transported protrude into the cover 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Buffer Packaging (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Moulding By Coating Moulds (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Un récipient en polyéthylène (PE) ou en matériau duroplastique est pourvu d'au moins un profil renflé (7) formé longitudinalement sur une arête du corps du récipient. Pour produire un tel récipient, par frittage par exemple, un corps creux fermé (1) en plastique est produit dans un moule rotatif et ensuite divisé de telle sorte le long d'une ligne de coupe (8) parallèle au profil renflé (7) qu'il en résulte un profil en rigole faisant saillie à l'intérieur du récipient et qui clôt l'arête du corps. Ce procédé permet de produire des séries petites ou moyennes de récipients ayant une arête bombée vers l'intérieur. Cette arête profilée, ainsi que la possibilité de maintenir constante la force des parois du récipient, même dans la région des coins et des arêtes, permet de produire en petites séries et à des conditions compétitives des récipients résistant à des charges élevées. Ces récipients gardent bien leur forme, même dans les bords et lors de contraintes élevées. L'arête profilée faisant saillie à l'intérieur du récipient convient particulièrement bien comme support de revêtements de récipients.
EP19860902295 1985-04-16 1986-04-15 Recipient en plastique avec arete profilee et son procede de fabrication Withdrawn EP0217879A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1612/85 1985-04-16
CH161285 1985-04-16

Publications (1)

Publication Number Publication Date
EP0217879A1 true EP0217879A1 (fr) 1987-04-15

Family

ID=4214504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860902295 Withdrawn EP0217879A1 (fr) 1985-04-16 1986-04-15 Recipient en plastique avec arete profilee et son procede de fabrication

Country Status (3)

Country Link
EP (1) EP0217879A1 (fr)
JP (1) JPS62502457A (fr)
WO (1) WO1986006044A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH682540A5 (de) * 1991-03-01 1993-10-15 Sulzer Ag Reinstraumverpackung.
FR2824807A1 (fr) * 2001-05-16 2002-11-22 Anisa Bombonne a col rentrant, notamment pour le transport et le stockage de produits dangereux
FR2872129B1 (fr) 2004-06-23 2008-12-12 Solystic Sa Bac de stockage pour lettres et objets plats postaux
SE532608C2 (sv) * 2007-05-04 2010-03-02 British American Tobacco Co Refilenhet samt fuktig rökfri tobaksprodukt
US7766171B2 (en) 2008-02-28 2010-08-03 Northrop Grumman Systems Corporation Rigid storage tray for flat and letter mail

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2049203A1 (de) * 1969-10-17 1971-04-29 Tuwa Plastik Dr Herbert Warnecke Erzeugung von Kunststoff artikeln, Wien Dose fur Flüssigkeiten und Verfahren zum Verschließen derselben
DE2603434A1 (de) * 1976-01-30 1977-08-11 Klaus Eberhard Becker Verpang mit mindestens einem formkoerper aus geschaeumtem kunststoff sowie verfahren zu seiner herstellung
GB1514201A (en) * 1976-04-29 1978-06-14 Adaptaform Plastics Ltd Rotational moulding
DE3134814A1 (de) * 1981-09-03 1983-03-10 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Kunststoffbehaelter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606044A1 *

Also Published As

Publication number Publication date
JPS62502457A (ja) 1987-09-24
WO1986006044A1 (fr) 1986-10-23

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