EP3127689A1 - Method and device for producing honeycomb panels - Google Patents

Abstract

The invention relates to a method for producing honeycomb panels (5) wherein a honeycomb-structured starting material (2) is transported in a transport plane (T), then separated along a parting plane (t), the resulting honeycomb strip (4) as a base strip for producing the honeycomb structure (1) and at least one further honeycomb strip (4) is joined to the base strip and stacked in a stacking plane (S) and is available as a new base strip for a subsequent expansion step, wherein the transport (T) and stacking plane (S) is nearly parallel and both aligned almost perpendicular to the parting plane (t) are characterized in that the material thickness generated before the joining process by the separation process corresponds to the final thickness of the honeycomb plate (5) to be produced. The invention also relates to a device for carrying out a previously described method, comprising: a transport device comprising a pushing and or pulling unit (12), a pressing unit (10), a separating unit (6), a joining unit (9), a guide unit (15 ) characterized in that the pressing unit (10) consists of at least two rigidly interconnected guide elements (8).

Description

The invention relates to a method for producing honeycomb panels according to the preamble of claim 1. Furthermore, the invention relates to an apparatus for performing a method according to claim 1 according to the preamble of claim 6. For the design of mobile and immobile interiors is a substitution of conventional materials by lightweight Composites necessary to reduce material, manufacturing, and transport costs.

Minimizing the use of materials can also have a positive effect on the readability of building materials and thus make a contribution to environmental protection. However, these building materials must also be produced in an affordable and high-quality manner, so that automated production is the goal. Paper honeycomb e.g. They are predominantly based on the renewable raw material wood and are less affected by resource shortages than fossil raw materials and metal raw materials. They are inexpensive, have very good mechanical properties with low material usage and therefore allow a comparatively large weight reduction. The competing embodiments are on the one hand the classic honeycomb construction (honeycomb) and on the other hand, the (bridge) honeycomb panel.

In " lightweightdesign "vol. 6 2009 p.55ff , Britzke describes the known production methods and forms.

DE10305747 describes a workpiece multilayer longitudinal section, and a method and an apparatus for its preparation.

DE3644419 discloses a laser cutting system for cutting flat material.

DE19913830 teaches corrugated board folding honeycomb and a method and apparatus for making same.

Of the DE4215261 is based on a method and an apparatus for producing a honeycomb body. For this purpose, a honeycomb body is cut, which is glued to a newly cut honeycomb body.

DE 19654672 shows a method and an apparatus for producing a corrugated cardboard honeycomb core wherein a separation of the corrugated cardboard in the feed direction is proposed.

In the state of science and technology is the production of honeycomb panels in common that a starting product must be added to a mechanically isolable intermediate product, then a separation by a mechanical separation process must be carried out and then a drying process is initiated to obtain the final product.

The object of the invention is to overcome the disadvantages of the state of science and technology.
This object is achieved by the invention by a method for producing honeycomb panels, wherein a honeycomb-structured starting material is transported in a transport plane, then separated along a parting line, the resulting honeycomb strip serves as base strip for producing the honeycomb structure and at least one further honeycomb strip joined to the base strip and stacked in a stacking plane and is available as a new base strip for a subsequent expansion step, wherein transport and stacking plane are almost parallel and both are aligned almost perpendicular to the parting plane and the material thickness of the final thickness of the honeycomb plate to be produced by the separation process before the joining process equivalent.

A honeycomb panel is to be understood as a sandwich component made of honeycomb strips, in which parallel web elements are connected to one another by material strips which do not run parallel thereto.

Under honeycomb-structured starting material is to be understood a starting material, which consists of at least one web element and are not connected to this parallel material strips.

Transport level is the level in which the starting material is moved. By stack level is meant the plane on which the honeycomb strips form the honeycomb panel by a joining together.

The advantage of this method is that no isolable intermediate must be added, so that non-mechanical separation processes can be used and a subsequent drying process is eliminated. According to the state of science and technology following honeycomb panels are joined into a block, which is then separated by a mechanical sawing process. The omission of this production-technical intermediate step not only has the advantage that such a block firstly does not have to be generated, but the additional advantage that a block not to be produced as such also does not have to be singulated; - the separation of such a block can be made economically only by mechanical separation processes, such as that of a sawing.

By eliminating such block production, separation processes, such as the use of a laser, an electron beam, plasma or a water jet can thus be realized.

It is thus particularly advantageous to carry out a separation process which is carried out by a non-mechanical separation process.

The use of these non-mechanical separation processes has the advantage, in contrast to the mechanical separation processes, of being able to produce cutting surfaces virtually without force. As a result, bruising of the honeycomb structures can be prevented. Burrs arise in the separation zones also only in minimal form. In addition, when using a mechanical separation process wears the cutting tool, which just eliminates the use of non-mechanical separation processes. Preferably, the separation process is to be carried out by a laser beam, since such produces almost burr-free cut surfaces. In addition, a corresponding laser cutting technology is relatively inexpensive and can be made without cutting, in contrast to the use of mechanical separation processes.

It is inherent in the method according to the invention that the honeycomb strip produced after the separation process is pressed onto the previously produced honeycomb strip provided with joining material (for example adhesive). By "pressing" in this sense is meant any form of bringing two joining surfaces together until physical contact. This has the advantage that immediately after the separation process, a joining process is carried out, which is the basis of the production of the honeycomb panel. As a result, slippage of the individual honeycomb strips is counteracted and additionally made by the pressurization centering of the honeycomb strip.

Of course, as a result, the positioning of two successive honeycomb strips can be made so that they can be made alternately defined within the manufacturing process. For example, the stripes may be oriented so that peaks and valleys of a wave are aligned so that peaks and valleys are nearly in one plane. Of course, an arbitrarily defined phase shift of heights and valleys can be realized.

Due to the reproducible alignment of the individual honeycomb strips to each other, the rigidity and thus the load capacity of the final product produced can be increased and thus the mechanical properties can be optimized. In this way, buckling and bending strengths can be specifically influenced.

According to a further aspect, the invention overcomes the disadvantages of science and technology by a device for carrying out a method of a transport device, which in turn from a push and or traction unit, a pressing unit, a separating unit, a joining unit and a guide unit, wherein the pressing unit consists of at least two guide elements rigidly interconnected.

Under transport device is a device to understand that consists of a push and pull unit or a support surface for the starting material. Only one unit can pull and push simultaneously depending on the direction.

The term "draw unit" is understood to mean a device which pulls the starting material in the direction of the conveying direction. Such a traction unit can consist of a roller extending tangentially to the web surface of the starting material or a belt driven by a roller, which is counteracted by a drive unit opening into a trough from the opposite side. In order to realize horizontal displacements of the transport device, this is of course also horizontally displaceable in the transport plane.

By push unit is meant a device which pushes the starting material in the conveying direction. A pushing unit can be made in the same form as a tractor unit.

Under separation unit is in turn a device to understand that is movable to the transport device and equipped with a cutting tool.

By joining unit is meant a device which has movable honeycomb strip with each other to the transport device. This can be a role in the respective case, which continuously applies adhesive to the webs of the honeycomb strip.

By guide unit is to be understood a device which guides the honeycomb plate to be formed and geometriebedingt forms. This can be done as a shaft. The width of the shaft in turn can be determined by an adjusting device.

A pressing unit is to be understood as a device which can be moved relative to the transport device and which consists of at least two guide elements and transmits a force to them.

Under a guide element is a device to understand that aligns input and output material with regard to their processing and leads.

According to a preferred embodiment, such a guide element is designed to be rotatable. At the contact surface between the guide element and the resulting honeycomb plate, the surface of the guide element can, due to its geometry, engage in the wave profile of the resulting honeycomb plate. But also a rolling of the guide element on the wave heights can be effective. In this case, a correspondingly rigid connection between the guide elements can transmit forces in all three production axes, so that not only drive forces but also centering forces can be transmitted uniformly to the guide elements. Due to the design as a rigid connection between the guide elements, it is possible to couple them at a defined distance with the separator.

Preferably, both guide elements are rotatable and almost identical running and mounted with the device connecting them so that both guide elements are compared to their storage in static equilibrium. This makes it possible to use the guide elements as a guide role for a directional manufacturing process. The respective guide element can be used depending on the direction. That During the manufacturing process, which is performed from the left to the right side, the same guide element is always engaged, while from the right to the left side, another guide element is actively involved in the manufacturing process.

Another advantage of the symmetrical design is that a force can be introduced into the static center of the connection of the guide elements and thereby, regardless of In the manufacturing process located guide element, respectively the same force or the same moment can be transferred to the guide element located in the manufacturing process. In this case, preferably in the static center of the rigidly interconnected guide elements, a torque sensor can be provided, which initiates a force or torque as needed in the guide elements.

Advantageously, an embodiment has proven in roll form. But even toothed embodiments in which each individual tooth in heights and or valleys of the input and Ausgansmaterialien are conceivable. In one embodiment, as a gear, its teeth may be structured in patterns, e.g. Intervene heights and valleys of the starting material and thereby realize centering and displacements in the form of horizontal orientations.

It is particularly advantageous if pressing, separating, joining and guiding unit are rigidly connected to each other and they can be moved relative to the transport device. As a result, pressing, separating and joining unit can be stored, guided and driven by a device. Characterized in that it is designed to be displaceable relative to the transport device, a strip-shaped separation can be realized, which is the starting product of the honeycomb panel.

If the guide unit is provided as a shaft, which is designed as a leading receptacle for the honeycomb panel to be produced, a stacking process can even be performed depending on the weight of the strip only by its gravity, in that the pressing unit places the separated honeycomb strip on a storage surface. A particularly preferred embodiment is to make the adjusting device and the guide unit movable relative to each other. Thus, in this case, a corresponding support surface can be made to be displaceable perpendicular to the stack plane, so that the uppermost layer of a honeycomb panel growing after each singulation step always has the same distance to the pressing unit.

• Figur 1 veranschaulicht das grundsätzliche Prinzip der Erzeugung der Wabenplatten in einer dreidimensionalen Zeichnung.
• Figur 2 zeigt eine dreidimensionale Ansicht der Wabenplattenerzeugung durch die Vorrichtung.
• Figur 3 zeigt eine dreidimensionale Ansicht der Vorrichtung mit Ausgangsmaterial und verfahrbarem Trennwerkzeug, Führungselementen und Fügeeinheit.
• Figur 4 zeigt eine Seitenansicht der gesamten Vorrichtung der Transportvorrichtung mit Antriebseinheit.
• Figur 5 zeigt eine Vorderansicht der Vorrichtung mit gekippten Führungselementen.
• FIG 6 zeigt dieselbe Ansicht wie Figur 5 mit entgegengesetzt gekippten Führungselementen.

The invention is explained in more detail below with reference to examples and associated figures. This is solely illustrative of the invention without limiting the generality.

• FIG. 1 illustrates the basic principle of producing the honeycomb panels in a three-dimensional drawing.
• FIG. 2 shows a three-dimensional view of the honeycomb plate production by the device.
• FIG. 3 shows a three-dimensional view of the device with starting material and movable cutting tool, guide elements and joining unit.
• FIG. 4 shows a side view of the entire device of the transport device with drive unit.
• FIG. 5 shows a front view of the device with tilted guide elements.
• FIG. 6 shows the same view as FIG. 5 with oppositely tilted guide elements.

In FIG. 1 a starting material (2) with aligned web element (3) is shown three-dimensionally. Wavy honeycomb structures (1) are applied to the web element (3). A honeycomb strip (4) is guided by the starting material (2) to be generated honeycomb plate (5). Wave troughs and heights are in each case in one plane at the honeycomb panel to be generated.

The combination of separation and stacking (transformation) is illustrated by the honeycomb strip (4) separated from the starting material (2) deposited on the honeycomb panel (5).

In FIG. 2 become the starting material and the honeycomb plate to be generated Fig. 1 shown. In addition, there are a pressing unit (10) consisting of two roller-shaped, rigidly interconnected guide elements (8), a separating unit (6), and a joining unit (9). The separation unit (6) is positioned here via a linear guide (7) parallel to the conveying device (F) and designed with a laser cutting head. The rigid connection of the guide elements (8) is mounted centrally. The starting material (2) is pushed horizontally at right angles to the honeycomb panel (5) to be produced.

In FIG. 3 a three-dimensional view of the device with starting material (2) and movable separation unit (6), guide elements (8), support surface (11) and joining unit (9) is shown.

In FIG. 4 the pull-and-push (12), and guide unit (15) of the device are shown. In this case, the starting material (2) via a support surface (11) to the pull o. Pusher unit (12) is brought forward, which promotes the starting material (2) in the direction of separation unit (6). Here, a guide member (8) having a contact area corresponding to the width of the strip presses on the stock material (2), while at the same time the separation unit (6) separates the honeycomb strip (4). The pressing unit (10) moves to the end of the starting material (2) and separates a honeycomb strip (4). The joining unit (9) has the separated honeycomb strip (4) and the honeycomb panel transport unit (14) and conveys the resulting honeycomb panel (5) of separating (6), joining (9), and pressing unit (10) for generating the honeycomb panel (5 ) in a guide unit (15) which is formed here like a shaft. In this case, the honeycomb panel (5) to be generated by a Honeycomb plate transport unit (14) moves away from the separation area. In this case, the transport unit (14) is provided in rolls and / or roll form. The shaft-shaped guide unit (15) is designed to be adjustable with respect to its guide width by an adjusting device (13), which means so much that a shaft wall is designed to be movable.
As a result, different thickness honeycomb panels (5) can be created with one and the same machine. But even during the generation process can be exercised for centering purposes by the adjusting device (13), a horizontal contact pressure on the honeycomb panel (2) to be generated. First, the separation of the honeycomb strip (4) takes place, this is added to existing honeycomb strip (4), the adjusting device (13) reduces the contact pressure on the honeycomb plate (5), is moved away from the separation area by the honeycomb plate transport unit (14), the adjusting device ( 13) builds up the pressure again and another strip (4) is separated from the starting material.

In FIG. 5 and FIG. 6 the manufacturing process is shown from the front view.

The separating unit (6), joining unit (9) and guide unit (15) coupled to the pressing unit (10) move along the guide (7) over the starting material (2), while the separating unit (6) separates a honeycomb strip (4). By being released from the starting material (2), it is pressed by the pressure of the guide element (8) on the existing, already joined honeycomb strips (4) and by the joining unit (9) with the existing honeycomb strip (4) has. The pressing unit (10) moves to the end of the starting material (2) and is tilted by the introduction of a tilting moment in the center of gravity of the pressing unit (10), so that now the other guide element (8) on the "return path" can perform the same manufacturing process, so No trips are required.

In FIG. 6 the "return" of Anpress (10) - separating (6) - guide (7) - and joining unit (9) is shown. For the details of the manufacturing process, the same conditions apply as under FIG. 5 described.

LIST OF REFERENCE NUMBERS

F

conveying direction

T

transport plane

t

parting plane

S

batch level

1

wavy honeycomb structure

2

starting material

3

web element

4

honeycomb strip

5

honeycomb panel

6

separation unit

7

guide

8th

guide element

9

joining unit

10

pressing unit

11

bearing surface

12

Pull or push unit

13

adjusting

14

Honeycomb plate transport unit

15

Guide unit

Claims (10)

Method for producing honeycomb panels (5), wherein a honeycomb-structured starting material (2) is transported in a transport plane (T), then separated along a parting plane (t) which serves as honeycomb strip (4) as a base strip for producing the honeycomb structure (1) and at least one further honeycomb strip (4) is joined to the base strip and stacked in a stack plane (S) and is available as a new base strip for a subsequent expansion step,
wherein transport (T) - and stacking plane (S) are almost parallel and both are aligned almost perpendicular to the parting plane (t), characterized in that
the thickness of material produced by the separation process before the joining process corresponds to the final thickness of the honeycomb panel (5) to be produced. Method according to the preceding claim
characterized in that
the separation process is performed by a non-mechanical separation process. Method according to one of the preceding claims
characterized in that
the separation process is carried out by a laser beam. Method according to one of the preceding claims
characterized in that
the honeycomb strip (4) produced after the separation process is pressed onto the previously produced and provided with joining material honeycomb strip (4). Method according to one of the preceding claims
characterized in that
the positioning of two successive honeycomb strips (4) within the manufacturing process can be carried out alternately. Apparatus for carrying out a method according to one of the preceding claims
consisting of: a transport device comprising a pushing and or pulling unit (12), a pressing unit (10), a separating unit (6), a joining unit (9), a guide unit (15) characterized in that the pressing unit (10) consists of at least two rigidly interconnected guide elements (8). Device according to the preceding claim
characterized in that
Both guide elements (8) are designed to be rotatable and almost identical and the connecting device is mounted so that both guide elements (8) are compared to their storage in static equilibrium. Device according to one of the preceding claims
characterized in that
Pressing (10) separating (6) and joining unit (9) are rigidly connected together and can be moved relative to the pulling and or pushing unit (12). Device according to the preceding claim
characterized in that
the guide unit (15) is provided as a shaft, which is designed as a leading receptacle for the honeycomb plate to be produced (5). Device according to one of the preceding claims
characterized in that
the adjusting device (13) and guide unit (15) are designed to be movable relative to each other.

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