EP3995304A1 - Pièce moulée, moyen de rembourrage, couche centrale et procédé de fabrication d'une pièce moulée - Google Patents

Pièce moulée, moyen de rembourrage, couche centrale et procédé de fabrication d'une pièce moulée Download PDF

Info

Publication number
EP3995304A1
EP3995304A1 EP21206579.1A EP21206579A EP3995304A1 EP 3995304 A1 EP3995304 A1 EP 3995304A1 EP 21206579 A EP21206579 A EP 21206579A EP 3995304 A1 EP3995304 A1 EP 3995304A1
Authority
EP
European Patent Office
Prior art keywords
fiber material
contour
contour elements
molded part
compression
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Withdrawn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
EP21206579.1A
Other languages
German (de)
English (en)
Inventor
Marek Hauptmann
Max Britzke
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.)
Technische Universitaet Dresden
Original Assignee
Technische Universitaet Dresden
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 Technische Universitaet Dresden filed Critical Technische Universitaet Dresden
Publication of EP3995304A1 publication Critical patent/EP3995304A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/006—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including controlled deformation of flat material, e.g. pleating, corrugating or embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/02—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles including pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0738—Cross sectional profile of the embossments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0754—The tools being other than rollers, e.g. belts or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0766—Multi-layered the layers being superposed tip to tip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0789—Joining plies without adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0794—Cutting

Definitions

  • the invention relates to a molded part consisting of a flat fiber material, into which contour elements projecting from a plane of the fiber material are formed by means of a compression drawing process.
  • the fiber material is clamped in a blank holder to which a force is applied during compression drawing and is drawn into a drawing gap between a drawing sleeve and a punch, the cross sections of which correspond to the cross-sectional shape of the contour element.
  • the gap dimension of the drawing gap is smaller than the thickness of the fiber material, so that the fiber material is compressed in the drawing gap in the area of the wall of the contour elements formed in the drawing gap.
  • the flat fiber material is formed, in particular three-dimensionally, by the compression drawing process.
  • the contour elements are also referred to below as indentations or indentations.
  • the invention further relates to a cushioning agent and a core layer of a sandwich material, each comprising the molded part.
  • the invention also relates to a method for producing a molded part consisting of a flat fiber material into which contour elements are molded three-dimensionally by means of a compression drawing method.
  • the fiber material is clamped in a blank holder to which a force is applied during the compression drawing and is drawn into a drawing gap between a drawing sleeve and a punch, the cross sections of which correspond to the cross-sectional shape of the contour element.
  • the dimension of the drawing gap is smaller than the thickness of the fiber material, so that the fiber material is compressed in the drawing gap.
  • the pamphlet DE 10 2014 106 427 A1 describes a method and a device for producing three-dimensional molded parts from a web of a flat, plastically deformable fiber material by deep-drawing with a stamp and an associated die.
  • a high forming ratio is to be achieved here.
  • the round, rectangular, oval or irregular blank for the molded part remains connected to the web of fiber material via at least one web during deep-drawing and is otherwise released from the web by at least one relief cut, with a forming ratio as the ratio of diameter and depth being greater than 0.2 is feasible.
  • the deformation is caused by the relief cut easier, but also reduces the stability of the track, so that it can no longer easily absorb these loads.
  • WO 2016/155710 discloses a device and a method for the three-dimensional shaping of a sheet-like fiber material using a compression-drawing method, with a continuous mode of operation being provided. There, however, the blank is separated from the flat fiber material before the compression drawing process is used, so that no stabilization of a flat fiber material can take place and it only remains as waste strips.
  • U1 discloses a folding box in a glued form that can be laid flat and erected in a packaging machine, formed from a printable cardboard blank with a padded insert.
  • the cushion insert consists of at least one single or double lamination in the form of individual and/or continuous embossings that do not, however, cross the folded edges perpendicularly.
  • the individual embossings are in the form of honeycombs or dots.
  • the printable cardboard blank with a padded overlay consists of a single or double lamination in the form of individual and/or continuous embossing that is offset from one another.
  • the embossings are embossed alternately on both sides from the plane of the paper. However, the embossings usually only have a small depth (often approx. 1 mm), so that the application as well as the effects that can be achieved are limited.
  • the pamphlet DE 197 58 126 A1 discloses a folding box with a partition for receiving tubular elements, which also has perforations. These are separated from each other by the partition, held in an upright position and can be removed from the top of the box.
  • the top and bottom walls of the folding box each consist of several layers of closure flaps arranged one on top of the other, of which at least one layer contains deformations perpendicular to its surface and/or at least one two-layer layer formed from a closure flap, of which at least one layer has deformations perpendicular to its surface. At least the respective outer layer of the top and bottom wall is connected to the layer underneath it.
  • the closure flap which has deformations perpendicular to its surface, develops a shock-absorbing effect.
  • top and/or bottom walls have high strengths, which can absorb a relatively large amount of energy under pressure via resilience of the layers exhibiting deformations. If the respective outer layer of the top and/or bottom wall is only partially bonded to the layer underneath, however, several layers of the top and/or bottom wall of the folding cardboard box can be moved relative to one another, resulting in a relatively high spring effect.
  • the deformations perpendicular to the face of the layers are formed by means of compression, preferably embossing. However, as a rule, embossings only have a small depth, so that in this case too the application and the achievable effects are limited.
  • Corrugated cardboard is known as a related application, but it can only be connected to cover layers in a line with the corrugated web. Therefore, adhesive-free corrugated board is rarely used and the energy absorption capacity, especially orthogonal to the web run, is limited. Corrugated tracks in a zigzag pattern cannot release targeted forming energy and can only be adapted to a limited extent to the product to be protected in a packaging. So-called knobbed paper is produced by an embossing process and allows only very small indentations without destroying the paper. None of the concepts mentioned above are suitable for a targeted control of the deformation energy over the deformation path.
  • Sandwich composites with a core layer made of paper are also known. Core layers of such sandwich composites are used in packaging, e.g. B. used in corrugated board, the end product being corrugated board laminated on both sides, also with several core layers. Paper honeycomb cores are also used as the core layer of light sandwich panels in interior design, furniture construction and trade fair construction. The multi-layer structure and in particular the production of honeycomb cores as the core layer are associated with increased effort.
  • Products made of plastics for example in the form of padding made of synthetic plastics, achieve a cushioning effect due to their elasticity, but are increasingly undesirable for such applications against the background of plastics recycling.
  • a molded part consisting of a, in particular three-dimensionally formed, flat fiber material, into which contour elements projecting from a plane of the fiber material are formed by means of a compression drawing process.
  • the fiber material is clamped in a blank holder subjected to a defined force during compression drawing and is drawn into a drawing gap between a drawing sleeve and a punch, which have or correspond to the cross-sectional shape of the contour element.
  • the dimension of the drawing gap is smaller than the thickness of the fiber material, so that the fiber material is compressed in the drawing gap in the area of the wall of the molded part. This is the special feature of compression drawing.
  • the compression of the fiber material in the area of the wall leads to increased strength of the wall and also to controlled fold formation, in which the folds are pressed into the wall in particular lead to a further increase in strength and are also hardly visible.
  • the molded part has a large number of contour elements and these remain at least partially connected to the surrounding fiber material.
  • the molded part is already partially separated from the flat fiber material by means of a relief cut before the compression drawing, i. H. it is also partially connected to the fibrous material.
  • the preferred relief cut follows the contour of the contour element. A number of shorter relief cuts are particularly preferably made in the fiber material concentrically around the contour.
  • the contour elements are designed, for example, in the form of a hemisphere, a cylinder, a cone, a pyramid or a truncated cone.
  • a molded part in which there is a radius R1 at a transition between the plane of the fiber material and the contour element, as well as a radius R2 between the wall of the contour element and its flattening, also promises advantages and influence compression resistance in such a way that a smaller radius causes an increased compression resistance of the contour element.
  • This effect can be used in a cushioning agent that absorbs impacts in order to adjust the properties in a targeted manner.
  • the molded part is used as the core layer of a sandwich material.
  • the stiffness of the molded part or a combination of several molded parts and cover layers is of interest.
  • an angle of 90° at the transition between the plane of the fiber material and the contour element alternatively or also an angle of 90° between the wall of the contour element and its bottom.
  • a rigidity is thus influenced in such a way that the angle of 90° causes the greatest rigidity of the wall of the contour element.
  • An advantageous embodiment provides for a cover layer and the connection of the molded part to a cover layer takes place in the region of the end of the contour elements facing away from the plane of the fiber material.
  • a further aspect relates to an upholstery means comprising a molded part as described above.
  • the contour elements can be arranged and combined in such a way that a targeted springback effect is achieved and the elastic energy component is comparatively high in order to absorb renewed loads. In addition, this is done by adjusting the angle between the plane of the fiber material and the wall of the contour element.
  • a paper web with contour elements solves the cushioning task by redirecting the stresses that occur into specific stress states in the contour elements.
  • the contour elements e.g. in the form of cups
  • the contour elements are designed in such a way that the transition radii from the web of fiber material into the contour element and from the wall to the bottom of the contour element, the shape of the wall, the distances between the radii and stiffening beads and longitudinal grooves create a targeted, tolerable energy level per element, which is released during deformation.
  • the compression drawing process is used for the reshaping, a particularly flexible adjustment of the strength, in particular of the wall of the contour elements, and the cushioning effect associated with this, is possible.
  • a blank holder control which controls the force of the blank holder on the flat fiber material
  • the formation of folds in the wall can be controlled and thus the strength or cushioning effect can also be adjusted indirectly.
  • another advantage of compression drawing is the compression of the folds in the wall, which makes it possible to achieve a visually appealing surface on the otherwise wrinkled wall.
  • Compression drawing allows the invention to be used as a cushioning agent for higher value-added products.
  • the challenge is to achieve a cushioning effect similar to that of known cushioning agents, which are often made of synthetic polymers (e.g. bubble film or air cushion webs), by absorbing energy in the form of deformation work.
  • the control of this behavior and, if necessary, the setting of a repeatable cushioning effect is the requirement for the cushioning agent and must be combined with a simple, yet flexible, reproducible process for its production in the context of cushioning agent use.
  • the elements can also be arranged and combined in such a way that a targeted resilience effect is achieved and the elastic energy component is comparatively high in order to absorb renewed loads.
  • the paper web allows a three-dimensional Deformation.
  • the distribution of the contour elements on the paper web and the cascaded design in several layers on top of each other is also used to set the overall energy absorption capacity of the semi-finished product. At the same time, a partial separation of the contour element from the web may be necessary to enable its manufacture.
  • connection with a cover layer or a comparable sheet with contour elements prevents the contour elements from moving relative to one another, so that the molded part according to the invention is also stiffened.
  • the connection also compensates for the disadvantage of the relief cuts.
  • the comparatively large connecting surfaces also enable a sufficiently strong connection using adhesive-free techniques (e.g. ultrasound-based connection).
  • a further aspect relates to a core layer of a sandwich material, comprising a molded part as previously described.
  • a particularly advantageous core layer is such that sheet-like cover layers are shear-resistant, e.g. B. are glued applied.
  • the invention thus envisages use as a core layer in sandwich composites.
  • a sandwich composite is created by applying shear-resistant cover layers on both sides. This can either be used in the packaging area (similar to a sheet of corrugated cardboard laminated on both sides) or in other areas, e.g. B. in trade fair construction (similar to the lightweight panels with paper honeycomb core).
  • the core layer can be designed as a single paper web with multiple mold cavities, as an embodiment of the molding according to the invention, or it can consist of a combination of several such webs. Further layers of web-like fiber material without mold cavities can also be arranged between the paper webs with multiple mold cavities.
  • Paper webs or another fiber material with multiple mold depressions the contour elements, as well as all other webs in the sandwich composite are used in different orientations to each other, z. B. at an angle of 90 °.
  • three-dimensional sandwich elements can be produced when using flexible cover layers.
  • the decisive factor for the resistance curve that results from orthogonal loading is the load introduction and transmission, controlled by the arrangement of the geometric elements. This determines the type of stress and its mixture and accordingly leads to different types of deformation (e.g. flexural fracture with layer delamination, buckling, pressure, shear).
  • the padding paths are influenced via the range depths B 1 , B 2 to B i .
  • the production of the contour elements in the web of the flat fiber material is achieved by an arrangement of relief cuts when the extensibility of the fiber material is exceeded. Due to the cutting pattern, webs are formed between the divergent interfaces during the forming process, which keep the molded part in the path and also allow the material to be fed into the mold due to their bending.
  • the area that can be used for gluing with cover layers or shaped webs of the same shape is defined by the bottom area and the remaining area of the web of fiber material in which no reshaping takes place.
  • the object of the present invention is also achieved by a method for producing a molded part, consisting of a flat fiber material, in which contour elements are formed three-dimensionally by means of a compression drawing process.
  • the fiber material is clamped in a blank holder subjected to a defined, preferably controllable force during compression drawing and drawn into a drawing gap between a drawing sleeve and a punch, the cross sections of which correspond to the cross-sectional shape of the contour element.
  • the gap dimension of the drawing gap is smaller than the thickness of the fiber material, so that the fiber material is compressed in the drawing gap in the area of the wall of the molded part.
  • the contour elements are continuously shaped in one or more active pairs in at least one step, with a modification of the compression drawing technique being provided by integrating blank holder technology and stamping technology in a working element that moves in the running direction of the fiber material at least for the respective work step.
  • the drawing sleeve and the stamp for carrying out the compression drawing process are integrated into a rotating or linearly repetitively moving working element. This means that a quasi-endless fiber material can be formed into the molded part.
  • the manufacturing method is thus characterized in that the contour elements are formed directly or formed in several steps in one or more active pairings without interruption. This therefore necessitates a modification of the compression drawing technique through the integration of blank holder technology and punch technology in the moving working element.
  • the pull-off speed should not have any significant influence on the forming result, so that manual pull-off can also be performed flexibly.
  • the forming unit is preferably designed to be resilient to external influences (access, material quality). It does not have linear axes that have to be controlled or regulated in a complex manner, but rather consists of mechanically or pneumatically linked movements. This leads to a particularly simple and robust solution.
  • the force applied to the blank holder is advantageously adjustable.
  • the advantageous effects of compression drawing unfold.
  • the strength of the wall can be influenced.
  • the formation of folds in the wall is influenced and controlled. This also leads to an influence on the strength and especially the rigidity.
  • an optical effect is achieved in that the folds are pressed into the wall while they are still developing and are then no longer or hardly visible.
  • cover layers and one or more molded parts are continuously brought together, for example coated separately with adhesive and then glued or by adhesive-free techniques, such as. B. ultrasound joined. They are then pressed together to form a sandwich composite. Then they are trimmed lengthwise and cut off crosswise, thus dividing them up.
  • the present invention enables the targeted adjustment of deformation energy and springback. Furthermore, the connection area to other layers that are to be connected to the semi-finished product according to the invention is increased. The invention further enables the complexity of the compression drawing process to be minimized for use in simple subsystems, aiding the manual packaging process.
  • the spacer structure made from a paper web based on the present invention allows three-dimensional formability.
  • the core according to the invention allows novel variants of sandwich composite materials.
  • the invention also achieves that the use of adhesive can be prevented or reduced by larger connecting surfaces that can be used with little or even no adhesive. It leads to a reduction in the use of plastic in the application of upholstery materials and a generally minimized use of materials Possibility of targeted voltage conduction.
  • the invention also offers the possibility of producing three-dimensional, dimensionally stable packaging and sandwich elements.
  • FIG. 1 shows a schematic perspective view of an embodiment of a molded part 1 according to the invention from the top and bottom with visible contour elements 2.
  • the contour elements 2 are raised, while from the bottom, on the right in the picture, they are indented are.
  • FIG. 2 shows a schematic perspective view of an embodiment of a molded part 1 according to the invention that is joined in two layers.
  • the two layers of the molded part 1 are connected to one another with the contour elements 2 that are flattened here. This can be done, for example, by gluing, but also by adhesive-free techniques.
  • FIG 3 shows a schematic perspective view of a further embodiment of a double-layer joined molded part 1 according to the invention, in which the two webs of fiber material 4 are connected to one another and the contour elements 2 protrude upwards and downwards.
  • FIG. 4 shows schematically a perspective view of an embodiment of a contour element 2 according to the invention in an enlarged representation. It was formed from the fiber material 4 by the compression drawing method.
  • figure 5 schematically shows a perspective side view of an embodiment of a contour element 2 according to the invention, as well as in the previous one 4 .
  • the radius R1 which is formed between the fiber material 4 and the wall 8 of the contour element 2
  • the radius R2 which connects the wall 8 to a flattening 6, is visible.
  • the flattening 6 is used, as already 2 explained, in particular to create a surface with which the connection of the contour element 2 is facilitated with another contour element 2 or a cover layer 10 or even made possible.
  • the helix angle ⁇ is also of particular importance for the rigidity of the molded part 1.
  • the energy absorption of the molded part 1 can be reduced if when it is used as a cushioning agent 20, or the rigidity of the molding 1 when it is used as a core layer 30 can be adjusted.
  • FIG. 6 shows a schematic perspective view of an embodiment of a molded part 1 according to the invention with a cover layer 10.
  • the cover layer 10 is connected to the molded part 1 via the flattening in 6 of the contour element 2 of the molded part 1.
  • FIG 7 schematically shows a perspective view of a further embodiment of a double-layer joined molded part 1 according to the invention with cover layers 10.
  • a cushioning means 20 in which the contour elements 2 absorb energy and prevent overloading of a packaged item protected by the cushioning means 20, or a core layer 30 of a sandwich material can be formed.
  • FIG. 8 shows a schematic representation of an embodiment of a manufacturing method of a molded part 1 according to the invention.
  • the compression drawing takes place via rotatable tools 12, shown only stylized here, which produce the contour elements 2 according to a continuous, rotary, roller-like method.
  • the tool 12 (at least an arrangement of several blank holders, drawing sleeves, stamps and the associated drives) could move with the fiber material at its web speed at least for the duration of the forming process in order to quickly start up after the compression drawing process has taken place to be returned to the starting point of tool movement and prepared for re-use.
  • the 9 shows a schematic sectional representation of shape variants of individual contour elements 2 of the molded part 1 according to the invention.
  • the 10 shows a schematic sectional representation of shape variants and combinations of individual contour elements 2 with different shapes in a molded part 1 according to the invention and 11 shows a schematic representation of shape variants of an embodiment of a pattern of Relief cuts 40 in the vicinity of the contour elements 2 of the molded part 1 according to the invention.
  • the decisive factor for the resistance curve that results from orthogonal loading is the load introduction and transmission, controlled by the arrangement of the geometric elements. This determines the type of stress and its mixture and accordingly leads to different types of deformation (e.g. flexural fracture with layer delamination, buckling, pressure, shear).
  • the cushioning paths of the cushioning means 20 are influenced by the different drawing depths h 1 , h 2 in the areas B1, B2.
  • the production of the contour elements 2 in the web of the flat fiber material 4 is achieved by an arrangement of relief cuts 40 when its extensibility is exceeded. Due to the cutting pattern of the relief cuts 40, webs 42 are formed between the diverging interfaces during the forming process, which webs hold the contour element 2 in the path of the flat fiber material 4 and, as a result of their bending, guide the fiber material 4 into the forming tool, the drawing sleeve with the punch, to permit.
  • the area that can be used for gluing with cover layers or similarly shaped molded parts 1 is defined by the bottom area, the flattened area 6 and the remaining web area of the fiber material 4 in which no reshaping takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP21206579.1A 2020-11-05 2021-11-04 Pièce moulée, moyen de rembourrage, couche centrale et procédé de fabrication d'une pièce moulée Withdrawn EP3995304A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020129225 2020-11-05

Publications (1)

Publication Number Publication Date
EP3995304A1 true EP3995304A1 (fr) 2022-05-11

Family

ID=78528779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21206579.1A Withdrawn EP3995304A1 (fr) 2020-11-05 2021-11-04 Pièce moulée, moyen de rembourrage, couche centrale et procédé de fabrication d'une pièce moulée

Country Status (1)

Country Link
EP (1) EP3995304A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117737A1 (de) 2022-07-15 2024-01-18 Syntegon Technology Gmbh Verfahren zur Herstellung mindestens eines Verpackungselements

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US997994A (en) * 1910-09-14 1911-07-18 John N Hahn Corrugated paper-board.
DE1863549U (de) 1962-05-18 1962-12-06 Landerer Fa A Faltschachtel.
US4778439A (en) * 1987-06-18 1988-10-18 Peerless Machine & Tool Corporation Apparatus and method for forming a clamshell assembly
DE19758126A1 (de) 1997-12-30 1999-07-01 Sanol Arznei Schwarz Gmbh Schachtel zur Aufnahme rohrförmiger Elemente
EP2463088A2 (fr) * 2010-12-08 2012-06-13 Ronald Jones Matériaux de conditionnement matelassés
DE102014106427A1 (de) 2014-05-08 2015-11-12 Technische Universität Dresden Verfahren und Vorrichtung zur Herstellung von Formteilen aus einer Faserwerkstoffbahn
WO2016155710A2 (fr) 2015-04-01 2016-10-06 Technische Universität Dresden Dispositif et procédé de mise en forme tridimensionnelle de matière fibreuse plane
DE102016106142A1 (de) * 2016-04-04 2017-10-05 Technische Universität Dresden Packmittel umfassend Fasermaterial und Verfahren zu seiner Herstellung durch Kompressionsziehen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US997994A (en) * 1910-09-14 1911-07-18 John N Hahn Corrugated paper-board.
DE1863549U (de) 1962-05-18 1962-12-06 Landerer Fa A Faltschachtel.
US4778439A (en) * 1987-06-18 1988-10-18 Peerless Machine & Tool Corporation Apparatus and method for forming a clamshell assembly
DE19758126A1 (de) 1997-12-30 1999-07-01 Sanol Arznei Schwarz Gmbh Schachtel zur Aufnahme rohrförmiger Elemente
EP2463088A2 (fr) * 2010-12-08 2012-06-13 Ronald Jones Matériaux de conditionnement matelassés
DE102014106427A1 (de) 2014-05-08 2015-11-12 Technische Universität Dresden Verfahren und Vorrichtung zur Herstellung von Formteilen aus einer Faserwerkstoffbahn
WO2016155710A2 (fr) 2015-04-01 2016-10-06 Technische Universität Dresden Dispositif et procédé de mise en forme tridimensionnelle de matière fibreuse plane
DE102016106142A1 (de) * 2016-04-04 2017-10-05 Technische Universität Dresden Packmittel umfassend Fasermaterial und Verfahren zu seiner Herstellung durch Kompressionsziehen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117737A1 (de) 2022-07-15 2024-01-18 Syntegon Technology Gmbh Verfahren zur Herstellung mindestens eines Verpackungselements

Similar Documents

Publication Publication Date Title
EP1165310B1 (fr) Structure en nid d'abeille plissee, en carton ondule, et procede et dispositif de fabrication associes
EP1287961B1 (fr) Procédé de fabrication d'un élément de revêtement multicouche
EP2991822B1 (fr) Procédé pour fabriquer des ames en nid d'abeilles ductiles
EP2094412B1 (fr) Élément structurel constitué d'un matériau plat, et son procédé de fabrication
EP0790109A1 (fr) Une méthode ainsi qu'un outil d'estampage et rainurage pour la fabrication de pièces découpées et rainurées
DE102013206086A1 (de) Mehrschichtiges Strukturbauteil
DE102008022805A1 (de) Wellfurnierplatte und daraus aufgebaute Leichtbauplatte sowie Verfahren zu deren Herstellung
EP3237183B1 (fr) Procédé et dispositif destinés à la fabrication d'une pièce en sandwich
WO2005061280A1 (fr) Bouclier thermique a absorption acoustique
DE102013202095B4 (de) Herstellung strukturierter Dekorschichten für Ausstattungsteile
EP3995304A1 (fr) Pièce moulée, moyen de rembourrage, couche centrale et procédé de fabrication d'une pièce moulée
EP1648742A1 (fr) Piece composite insonorisante
DE19610574C1 (de) Verfahren und Stanz- und Rillwerkzeug zur Herstellung von gerillten Stanzteilen
EP2712790B1 (fr) Toit de véhicule cintré avec élément d'amortissement et de renforcement
DE4312555C2 (de) Verfahren zur Herstellung von mehrlagigen Werkstücken
AT519010B1 (de) Kfz-Bauteil
DE29712684U1 (de) Mehrlagige Verbundplatte
DE10317670A1 (de) Hohlkammerelement für Kraftfahrzeuge
DE19540261C2 (de) Verfahren zur Herstellung von Formteilen
EP2856913A1 (fr) Élément de meuble de type plaque
DE102005045794B4 (de) Verfahren zur Herstellung einer mehrschichtigen Unterbodenverkleidung für Kraftfahrzeuge
DE102007004695A1 (de) Umformverfahren
DE3117095C2 (de) Verfahren zur Herstellung von Teilen beidseitig gedeckter Wellpappe sowie preß- oder prägeverformbares Wellpappe-Halbzeug zur Erzeugung formstabiler Fertigproduktteile
DE10212450A1 (de) Verkleidungsteil sowie Verfahren und Vorrichtung zur Herstellung von mehrlagigen Verkleidungsteilen, insbesondere von Innenverkleidungsteilen für Kraftfahrzeuge
EP1704041A1 (fr) Dispositif et procede pour produire une piece façonnee

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20221112