EP4136358A1 - Couvercle pliable à éléments rigides et procédé de fabrication du couvercle pliable - Google Patents

Couvercle pliable à éléments rigides et procédé de fabrication du couvercle pliable

Info

Publication number
EP4136358A1
EP4136358A1 EP21715177.8A EP21715177A EP4136358A1 EP 4136358 A1 EP4136358 A1 EP 4136358A1 EP 21715177 A EP21715177 A EP 21715177A EP 4136358 A1 EP4136358 A1 EP 4136358A1
Authority
EP
European Patent Office
Prior art keywords
fold
rigid
cover
adhesive
rigid element
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
Application number
EP21715177.8A
Other languages
German (de)
English (en)
Inventor
Jürgen HEBERER
Lukas Heidrich
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.)
Hema Maschinen und Apparateschutz GmbH
Original Assignee
Hema Maschinen und Apparateschutz 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 Hema Maschinen und Apparateschutz GmbH filed Critical Hema Maschinen und Apparateschutz GmbH
Publication of EP4136358A1 publication Critical patent/EP4136358A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • B23Q11/0816—Foldable coverings, e.g. bellows

Definitions

  • the invention relates to a fold cover, in particular a fold cover for a machine tool, with a flexible fold element and one or more rigid elements connected to it, as well as a method for producing such a fold cover.
  • Rigid elements are used on fold covers, for example to stabilize the fold cover, to fix the fold cover at its ends and to protect the fold cover.
  • Fold covers and in particular fold covers for machine tools are used for variable-length areas of machine tools and are connected to a structure at the respective ends of the variable-length area.
  • the fold covers can run in any spatial direction, with common orientations being horizontal or vertical.
  • the rigid elements, which can serve to stabilize the fold cover with a corresponding alignment are usually referred to as support frames and can be designed as individual profiles arranged in the fold valleys in the form of tabs or as profiles connected to one another by spring elements.
  • the elements that connect the pleat cover to another structure are called end frames.
  • the fold element is structurally damaged, so that a weakening of the fold element occurs at these points, which can lead to breaks or tears during the continuous stress (change in length) of the fold element.
  • the connection of rigid elements to the fold material by gluing is a standard process, but it is very time-consuming.
  • the individual folds are currently exposed to a liquid adhesive that contains a solvent. A longer flash-off time must then be observed until the solvent has largely evaporated for further processing.
  • the fold element is spread out during the evacuation so that the folds to which the liquid adhesive is applied do not stick to one another during this time. There is a considerable amount of space required for this.
  • the work area must be specially ventilated during evacuation, ie extraction of solvent vapors must be ensured.
  • the actual material connection between the fold material and the rigid element is achieved after the rigid element has been positioned, for example in a fold, by thermal activation and curing of the adhesive on a heating plate.
  • the entire assembly must be precisely aligned and kept under pressure. In particular with larger dimensions and with rigid elements made of plastic, there is also the risk that the introduced rigid elements will be deformed due to the high temperature introduced and then have to be readjusted with additional effort.
  • the object of the invention is to improve a connection of fold material and rigid elements in such a way that their production process is simplified and the working conditions are improved without the durability of the fold cover produced being impaired or its construction being complicated.
  • the invention provides that the thermally activated adhesive is used as a shaped element between the fold element and the rigid Element is introduced; Introducing energy into the molded element until an activation temperature range of the thermal is reached activatable adhesive; Establishing a material connection between the fold element and the rigid element.
  • the molded element is dimensionally stable at room temperature and it can also be provided that the thermally activated adhesive is also dimensionally stable at room temperature.
  • the molded element has a carrier or a substrate for the thermally activated adhesive. This carrier or this substrate can remain between the fold element and the rigid element after the molding element has been introduced, or it can be detached from the thermally activated adhesive.
  • the provision of a method with the molded element contributes to the fact that the manufacturing process and in particular the use of adhesive in the manufacturing process can be quantified.
  • a thermally activatable adhesive it is achieved in an advantageous manner that an adhesive effect only occurs when the adhesive is activated.
  • the parts to be connected can be aligned with one another as long as activation is not carried out.
  • Activation temperature range between 90 ° C and 120 ° C. In this temperature range, it is advantageously achieved that pre-thermal damage to the elements of the fold cover is avoided. This helps to increase the service life of the pleat cover.
  • the energy is introduced by ultrasound or high-frequency vibrations.
  • the energy is introduced through mechanical vibrations around the high-frequency or ultrasonic range, molecular and / or interface friction is generated in the excited area, whereby the required heat is introduced into the thermally activated adhesive.
  • This turns out to be particularly advantageous since the activation temperature can thus be achieved in a particularly energy-efficient manner and particularly in the relevant connection area.
  • a vibration-excited clamping jaw or by a Ultrasonic sonotrode is initiated.
  • Clamping jaws are particularly suitable for introducing mechanical vibration to achieve an activation temperature of a thermally activated joining agent, since the energy can be introduced on both sides.
  • the use of a sonotrode also has the advantage that the energy can be introduced in a spatially targeted manner, as a result of which the overlap area of thermally activatable adhesive, the fold element and the rigid element can be covered particularly well.
  • the energy is introduced by direct introduction of heat by means of a heating plate or by energetic radiation.
  • the energetic radiation is provided by a suitable radiation source.
  • the respective rigid element is pre-positioned on the fold element and pre-fixed by applying adhesive dots.
  • the molded element is also pre-fixed by means of adhesive dots before the activation of the thermally activatable adhesive. This will ensure the correct alignment of all elements to be joined together.
  • the invention also relates to a pleat cover with a flexible pleat element which is variable in length in a pull-out direction and to which one or more rigid elements are attached.
  • a pleat cover with a flexible pleat element which is variable in length in a pull-out direction and to which one or more rigid elements are attached.
  • a thermally activated adhesive By providing a thermally activatable adhesive, it is achieved in an advantageous manner that an adhesive effect only occurs when the adhesive is activated. As a result, the parts to be connected can be aligned with one another as long as activation is not carried out.
  • the provision of a shaped element results in the advantage that the adhesive or the joining agent can be positioned very precisely between the rigid element and the fold element and can also be dosed very precisely. In this way, incorrect positioning and incorrect dosing are advantageously avoided.
  • the thermally activatable adhesive is arranged on a substrate of the molded element.
  • a substrate can advantageously impart structural integrity to the molded element, for example for its application. As soon as the shaped element is attached to the respective joint between the rigid element and the fold element, the substrate can be removed or it remains between the rigid element and the fold element even after the activation of the thermally activated adhesive.
  • the adhesive of the molding element is dry in an inactivated state and does not have any significant adhesive properties. This has the advantage that the shaped element remains alignable with respect to the rigid element and / or the fold element.
  • the shaped element is arranged in the region of fold tips of the fold cover.
  • the mechanical stability of the fold element is highest there and a joint between the fold element variable in length and the rigid element has an ideal point of application there.
  • At least one first rigid element is a support frame for supporting folds of the fold element.
  • the respective rigid element or at least Another rigid element is a lamella.
  • the respective rigid element or at least one further rigid element is an end support frame.
  • the variable-length cover can be connected to such movable elements, between which the pleat cover is intended to be variable in length.
  • the fold element has the lamellae on the side facing away from the support frame.
  • the lamellae it can optionally be provided that the lamellae are connected to the fold material by means of the solid adhesive.
  • the respective end support frame it can be provided that the respective end support frame is connected to a first or a last fold leg of the fold element by the solid adhesive.
  • the shaped element extends around an apex region of the support frame and the shaped element is arranged in a respective fold tip of the fold element on a respective fold leg.
  • the shaped element is a belt-shaped endless material.
  • the shaped element can be tailored particularly easily for use in joining the rigid element with the pleat element.
  • the fold element is pre-fixed on the respective rigid element by means of adhesive dots.
  • the molded element is also pre-fixed by means of adhesive dots before the activation of the thermally activatable adhesive. This will ensure the correct alignment of all elements to be joined together.
  • the fold material is multilayered. By providing several layers, different materials can be combined for the fold material. Individual layers can take on certain functions. For example, one of the multiple layers can have a resistance against chemicals, while another layer, for example, improves the tensile strength of the fold material.
  • the support frame has a support frame material made of PVC.
  • PVC polyvinyl styrene
  • the joint between the rigid element and the fold material is improved by means of the molding element with the thermally activated adhesive, since a material pairing between plastics is easier to produce than between a plastic and a metal.
  • PVC the material for the rigid member
  • the fold cover is improved in that the fold cover becomes lighter compared to metal rigid members.
  • FIG. 1 shows a schematic, perspective illustration of the fold cover 1 with a flexible fold element 10 which is variable in length in a pull-out direction A and to which a rigid element 20 is fastened by way of example in this illustration.
  • the rigid element 20 is shown here by way of example as a support frame for supporting folds of the fold element 10. Between the pleat element 10 and the rigid element 20, an integral connection is established by means of a molded element 30 with a thermally activated adhesive.
  • the shaped element 10 is arranged in the region of a fold tip 12 of the fold cover 1.
  • the shaped element 30 extends around an apex region 22 of the rigid element 20 or of the support frame and the shaped element 30 is arranged in a respective fold tip 12 of the fold element 10 on a fold leg 14a, b.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention porte sur un procédé de fabrication d'un couvercle pliable (1) comprenant un élément pliable (10) et au moins un élément rigide (20). Un adhésif thermoactivable est prévu pour relier l'élément rigide (20) à l'élément pliable (10). Selon l'invention, l'adhésif thermoactivable est introduit entre l'élément pliable (10) et l'élément rigide (20) en tant qu'élément moulé (30). Le procédé comprend les étapes consistant à introduire de l'énergie dans l'élément moulé (30) jusqu'à ce qu'une plage de température d'activation de l'adhésif thermoactivable soit atteinte; et à produire un assemblage par collage entre l'élément pliable (10) et l'élément rigide (20). L'invention concerne en outre un couvercle pliable (1) avec un élément pliable flexible (10) qui présente une longueur variable dans une direction d'extraction (A) et auquel sont fixés un ou plusieurs éléments rigides (20). Selon l'invention, un assemblage est réalisé entre l'élément pliable (10) et l'élément rigide respectif au moyen d'un élément moulé (30) avec un adhésif thermoactivable.
EP21715177.8A 2020-04-17 2021-03-22 Couvercle pliable à éléments rigides et procédé de fabrication du couvercle pliable Pending EP4136358A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020110576.2A DE102020110576A1 (de) 2020-04-17 2020-04-17 Faltenabdeckung mit starren Elementen und Verfahren zur Herstellung der Faltenabdeckung
PCT/EP2021/057208 WO2021209226A1 (fr) 2020-04-17 2021-03-22 Couvercle pliable à éléments rigides et procédé de fabrication du couvercle pliable

Publications (1)

Publication Number Publication Date
EP4136358A1 true EP4136358A1 (fr) 2023-02-22

Family

ID=75277990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21715177.8A Pending EP4136358A1 (fr) 2020-04-17 2021-03-22 Couvercle pliable à éléments rigides et procédé de fabrication du couvercle pliable

Country Status (3)

Country Link
EP (1) EP4136358A1 (fr)
DE (1) DE102020110576A1 (fr)
WO (1) WO2021209226A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240988A1 (de) * 1981-12-14 1983-06-23 Gebr. Hennig Gmbh, 8045 Ismaning Faltenbalg
FR2559228B1 (fr) * 1984-02-02 1989-05-19 Patard Roger Procede de fabrication d'un soufflet a deploiement total et soufflet obtenu
DE3735452A1 (de) * 1987-10-20 1989-05-03 Arnold Arno Gmbh & Co Faltenbalg
DE102013210407A1 (de) * 2013-06-05 2014-12-11 Arno Arnold Gmbh Eigensteife teleskopische Schutzabdeckung
DE102013015092B4 (de) * 2013-09-14 2020-12-31 Möller Werke GmbH Längenveränderbare Faltenabdeckung

Also Published As

Publication number Publication date
DE102020110576A1 (de) 2021-10-21
WO2021209226A1 (fr) 2021-10-21

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