Method and apparatus for producing a reinforcement mesh
10815151 ยท 2020-10-27
Assignee
Inventors
Cpc classification
B29C70/22
PERFORMING OPERATIONS; TRANSPORTING
B29C65/5078
PERFORMING OPERATIONS; TRANSPORTING
B29C66/52651
PERFORMING OPERATIONS; TRANSPORTING
B29C66/8432
PERFORMING OPERATIONS; TRANSPORTING
B29C65/4815
PERFORMING OPERATIONS; TRANSPORTING
B29K2067/00
PERFORMING OPERATIONS; TRANSPORTING
B29C66/8322
PERFORMING OPERATIONS; TRANSPORTING
B29K2031/00
PERFORMING OPERATIONS; TRANSPORTING
B29C66/72141
PERFORMING OPERATIONS; TRANSPORTING
B29C66/83221
PERFORMING OPERATIONS; TRANSPORTING
B29K2063/00
PERFORMING OPERATIONS; TRANSPORTING
E04C5/07
FIXED CONSTRUCTIONS
B29D28/005
PERFORMING OPERATIONS; TRANSPORTING
B29C70/845
PERFORMING OPERATIONS; TRANSPORTING
B29C66/1122
PERFORMING OPERATIONS; TRANSPORTING
B29C65/483
PERFORMING OPERATIONS; TRANSPORTING
B29C66/7212
PERFORMING OPERATIONS; TRANSPORTING
B29C66/71
PERFORMING OPERATIONS; TRANSPORTING
B25J15/00
PERFORMING OPERATIONS; TRANSPORTING
B29C66/71
PERFORMING OPERATIONS; TRANSPORTING
B29K2031/00
PERFORMING OPERATIONS; TRANSPORTING
B29C65/5057
PERFORMING OPERATIONS; TRANSPORTING
B29C65/5085
PERFORMING OPERATIONS; TRANSPORTING
B29K2067/00
PERFORMING OPERATIONS; TRANSPORTING
B29C66/7212
PERFORMING OPERATIONS; TRANSPORTING
C04B35/80
CHEMISTRY; METALLURGY
B29C65/524
PERFORMING OPERATIONS; TRANSPORTING
B29C66/73941
PERFORMING OPERATIONS; TRANSPORTING
B29C70/30
PERFORMING OPERATIONS; TRANSPORTING
International classification
B29D28/00
PERFORMING OPERATIONS; TRANSPORTING
B29C70/22
PERFORMING OPERATIONS; TRANSPORTING
B29B15/12
PERFORMING OPERATIONS; TRANSPORTING
C04B35/80
CHEMISTRY; METALLURGY
C03C25/1025
CHEMISTRY; METALLURGY
B25J15/00
PERFORMING OPERATIONS; TRANSPORTING
E04C5/07
FIXED CONSTRUCTIONS
B29C65/48
PERFORMING OPERATIONS; TRANSPORTING
B29C70/30
PERFORMING OPERATIONS; TRANSPORTING
B29C70/84
PERFORMING OPERATIONS; TRANSPORTING
B29C65/52
PERFORMING OPERATIONS; TRANSPORTING
B29C65/50
PERFORMING OPERATIONS; TRANSPORTING
Abstract
A method and an apparatus for producing a reinforcement mesh. Here, a reinforcement fiber strand is firstly saturated with a resin (H) and cured to form a cured, fiber-reinforced strand material. The strand material present as an endless material is then cut lengthwise into bars, which are then used as longitudinal bars or transverse bars for forming the reinforcement mesh. A connecting material is used at each intersection point between a longitudinal bar and a transverse bar and is dispensed in liquid form at the intersection point or is liquefied and then cured at the intersection point. A fixed connection is thus created between the longitudinal bars and the transverse bars at the intersection points. Between the intersection points, the longitudinal bars and the transverse bars have portions that are free of connecting material.
Claims
1. A method for producing a reinforcement mesh (45), the method comprising: feeding a reinforcement fiber strand (29) to a saturation station (31) via a conveying device (30), saturating the reinforcement fiber strand (29) with a resin (H), stripping an excess resin amount of the resin (H) from the saturated reinforcement fiber strand (29) in a stripping station (36), forming an uncured fiber-reinforced strand material (38) or curing the resin (H) in a curing station (37) to form a cured fiber-reinforced strand material (38), producing bars (26) by cutting the fiber-reinforced strand material (38) to a length in a cutting station (40), depositing a plurality of the bars (26) side-by-side as longitudinal bars (46) using a manipulator device (48), depositing another plurality of the bars (26) as transverse bars (47) on the longitudinal bars (46) using the manipulator device (48), connecting the transverse bars (47) and the longitudinal bars (46) at intersection points (64) thereof by: a) applying with a dispensing device a curable connecting material (V) exclusively to the intersection points (64), at each of which one of the longitudinal bars (46) and transverse bars (47) come into contact, either after the longitudinal and transverse bars are in contact, or prior to the transverse bars (47) being deposited on the longitudinal bars (46), and curing the connecting material (V) for connection of the transverse bars (47) to the longitudinal bars (46) at the intersection points (64) when the longitudinal bars (46) and/or transverse bars (47) are already cured, or b) curing the longitudinal bars (46) and/or transverse bars (47) for connection of the transverse bars (47) to the longitudinal bars (46) at the intersection points (64) when the longitudinal bars (46) and/or transverse bars (47) are not yet cured prior to connection thereof.
2. The method according to claim 1, further comprising holding the saturated reinforcement fiber strand (29) under tensile stress during the curing thereof.
3. The method according to claim 1, further comprising establishing the connection at the intersection points (64) without additional connecting material during the curing of the resin (H) of a longitudinal bar (46) and/or a transverse bar (47), or establishing the connection at the intersection points (64) using a second resin as the connecting material (V), the second resin having a curing property different from the resin (H) of the longitudinal bars (46) and transverse bars (47).
4. The method according to claim 3, wherein the connection is established using a second resin as the connecting material (V), the second resin having a curing property different from the resin (H) of the longitudinal bars (46) and transverse bars (47), further comprising curing the second resin at a different temperature compared to the resin (H) of the longitudinal bars (46) and transverse bars (47).
5. The method according to claim 3, wherein the connection is established using a second resin as the connecting material (V), the second resin having a curing property different from the resin (H) of the longitudinal bars (46) and transverse bars (47), further comprising curing the second resin used as connecting material (V) by supplying heat or by induction, and curing the resin (H) of the longitudinal bars (46) and transverse bars (47) by irradiation with light or vice versa.
6. The method according to claim 1, further comprising conveying the reinforcement fiber strand (29) and the strand material (38) as an endless material by a conveying device (30) to the cutting station (40).
7. The method according to claim 6, wherein the conveying device (30) is arranged after the curing station (37) and the method further comprising exerting a tensile force by the conveying device (30) onto the strand material (38).
8. The method according to claim 1, further comprising controlling a cutting device (41) of the cutting station (40) to produce a specified number of the bars (26) each of a specified length for a reinforcement mesh (45).
9. The method according to claim 1, further comprising: applying a predetermined amount of the connecting material (V) to a transverse bar (47) on all sides thereof at intersection points (64) using the dispensing device (63), and laying the transverse bar (47) on the longitudinal bars (46).
10. The method according to claim 1, further comprising: applying a predetermined amount of the connecting material (V) to the longitudinal bars (46) at all intersection points (64) using the dispensing device (63), and laying the transverse bars (47) on the longitudinal bars (46).
11. The method according to claim 1, wherein the dispensing device (63) has a mold (70) having two mold parts (71), and the mold parts (71) each surround one of the intersection points (64) once at least one of the transverse bars (47) has been deposited on the longitudinal bars (46), and wherein the method further comprises conveying the connecting material (V) into the mold (70), which is closed around the intersection point (64), and is then cured.
12. The method according to claim 1, wherein at each intersection point (64) a push-on connection part (77) of a plastic material is first connected to one of the longitudinal bars (46) or transverse bars (47) at the intersection point (64) thereof and is then connected to the other of the transverse or longitudinal bars (47 or 46) at the intersection point (64) thereof by being pushed in place or pushed on.
13. The method according to claim 12, wherein, once a connection has been established at the intersection point (64) by the push-on connection part (77), introducing the connecting material (V) into gaps between portions of the one longitudinal bar (46), the one transverse bar (47), and the push-on connection part (77), and the connecting material (V) is then cured.
14. The method according to claim 12, further comprising using at least a portion of the plastic material of the push-on connection part (77) as connecting material (V), wherein the plastic material is made flowable by introducing energy by the dispensing device (63) and the plastic material is then cured.
15. The method according to claim 1, further comprising connecting a reinforcement mesh (45) to at least one further bar (45, 46) or to a further reinforcement mesh (45) to form a three-dimensional reinforcement body.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Advantageous embodiments of the invention will become clear from the dependent claims, the description, and the drawings. Preferred exemplary embodiments of the invention will be explained in detail hereinafter with reference to the drawings, in which:
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DETAILED DESCRIPTION
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(18) The reinforcement fiber strand 29 is supplied to a saturation station 31. The saturation station 31 can have a plurality of deflection rolls or deflection cylinders 32, around which the reinforcement fiber strand is guided through a bath 33 of liquid resin H and is thus saturated with the resin H. The resin H adheres to the outer surface of filaments 34, which form the reinforcement fiber strand 29 (
(19) The saturated reinforcement fiber strand 29 is then supplied to a stripping station 36. The stripping station 36 is designed to strip excess resin H from the saturated reinforcement fiber strand 29. In accordance with the example, the stripping station is arranged vertically above the bath 33, so that the stripped resin H is fed back into the bath 33, this being illustrated in a heavily schematised manner in
(20) After the stripping station 36, the resin H is cured in one embodiment in a curing station 37. Depending on the used resin H, the curing is performed by a physical and/or chemical process. This is dependent on the curing property of the resin H. For example, heat and/or UV light can act on the resin H in the curing station 37. The energy can be introduced for example also by induction when the resin H and/or the reinforcement fiber strand 29 contains electrically conductive material. Alternatively or additionally, chemical agents can also be applied to the saturated reinforcement fiber strand 29 in order to cure the resin H in the curing station 37.
(21) As a result of the curing of the resin H, a cured, fiber-reinforced strand material 38 is created. It is also possible to further process the resin-saturated reinforcement fiber strand 29 without curing the resin H, i.e. as an uncured, fiber-reinforced strand material 38. In this case, the curing station 37 can be spared or the reinforcement fiber strand 29 can be conveyed through the non-operated curing station 37 or past the curing station 37.
(22) In accordance with the example, a tensile force is exerted onto the cured or uncured fiber-reinforced strand material 38 by means of the conveying device 30 and thus also acts on the reinforcement fiber strand 29 as far as the storage device 27 or reel 28. A removal or conveyance of the reinforcement fiber strand 29 and of the strand material 38 is thus achieved. The reel 28 or the storage device 27 can optionally be assigned a braking device 39. A tensile force which acts on the reinforcement fiber strand 29 can thus be adjusted in a defined manner, so that the reinforcement fiber strand is held under tensile stress during the optional curing 37. The braking device 39 can also optionally be arranged as a separate device before the curing station 37 and for example can have braked rolls, cylinders, conveying belts or the like, which counteract the removal force of the conveying device 30 and maintain a tensile stress of the saturated reinforcement fiber strand 29 in the curing station 37. The tensile force can be controlled by open-loop or closed-loop control.
(23) The strand material 38 can also receive thrust forces in its direction of extent in order to be transported on further. It can therefore be moved on further, through the conveying device 30, to a cutting station 40 having a cutting device 41. The cutting device 41 cuts the strand material conveyed as endless material, whereby the bars 26 are formed. In the exemplary embodiment described here, the bars 26 have a circular cross-section (
(24) The produced bars 26 are then used to form a reinforcement mesh 45 formed of a plurality of longitudinal bars 46 and a plurality of transverse bars 47.
(25) The longitudinal bars 46 are firstly deposited on a support surface 49 by means of a manipulator device 48. Adjacent longitudinal bars 46 are arranged here at a distance dy from one another. The support surface 49 is oriented parallel to a plane that is spanned by an x direction and a y direction of a Cartesian coordinate system. In accordance with the example, the longitudinal bars 46 extend parallel to one another in the x direction. Alternatively, they could also be oriented at an acute angle, inclined relative to the x direction. The distance dy between two longitudinal bars 46 can be constant or can vary (
(26) In the exemplary embodiment illustrated schematically in
(27) The separating unit 50 can be moved on the whole parallel to the support surface 49, for example along a rail 57, which can be seen schematically in
(28) By means of the storage of a plurality of longitudinal bars 46, a greater number of longitudinal bars 46 can be deposited on the support surface 49 very quickly by means of the manipulator device 48 from
(29) Alternatively to the embodiment shown in
(30) The above-described manipulator device 48 can be used traditionally to deposit the longitudinal bars 46 on the support surface 49 and also to deposit the transverse bars 47 on the longitudinal bars 46. For example, the same gripper device 60 can grasp and deposit both the longitudinal bars 46 and also the transverse bars 47. The manipulator device 48 shown in
(31) The longitudinal bars 46 and the transverse bars 47 are in contact with one another at intersection points 60 (
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(34) A further possibility for applying the connecting material V is shown schematically in
(35) In order to form the mesh structure of the reinforcement mesh 45, the connecting material V can be applied to each intersection point 64 by means of a mold 70. The connecting material V can be a resin or another plastics material, by means of which the portions of the bars 46, 47 are encapsulated at the intersection point 64.
(36) A further possibility for connecting a longitudinal bar 46 and a transverse bar 47 at an intersection point 64 will be described with reference to
(37) In the exemplary embodiment shown in
(38) As can be seen in particular in
(39) The push-on connection parts 77 for example can be firstly pushed onto the longitudinal bars 46 or alternatively onto the transverse bars 47 at the relevant intersection points 64. The other bars 47 or 46 respectively are then likewise connected to the push-on connection parts 77 at the intersection points 64. A positively engaged and/or interlocking connection is thus created between a longitudinal bar 46 and a transverse bar 47 at each intersection point 64.
(40) Two possible variants of the further sequence of the process will now be explained with reference to
(41) A further possibility is shown schematically in
(42) In a further method variant connecting material V can additionally be completely spared. Here, at least one of the bars 46, 47, which rest against one another at an intersection point 64, is not cured. The reinforcement mesh 45 is then cured as a whole in the curing device 66. The main difference in this method lies in the fact that additional connecting material V is spared. Otherwise, the process is performed similarly to the illustration according to
(43) In a further variant of the method the used connecting material V can be identical to the resin H of the bars 46, 47. The renewed curing of bars 46, 47 already cured in order to cure the connecting material V does not have any disadvantageous effects.
(44) In all methods it must be ensured when using the curing device 66 that there is no harmful effect on resin that has already been cured, for example as a result of thermal breakdown due to excessive temperatures. In the case of thermal curing, either a lower or the same curing temperature is used in the curing device 66 as for the curing of the resin H of the bars 46, 47.
(45) In all methods a portion of the longitudinal bar 46 and of the transverse bar 47 that is free of connecting material V remains between the intersection points 64. The connecting material V is applied selectively to the respective intersection points 64. The properties of the bars 46, 47 are thus maintained. For example, the bending properties of the bars 46, 47 of the reinforcement mesh 45 are not compromised by the cured connecting means V.
(46) Besides the saving of the amount of connecting material V, there is in particular also no waste material of the bars 26. The cutting device 41 in the cutting station 40 can be controlled in such a way that, in order to produce a reinforcement mesh 45 with a desired contour, merely bars 26 of the necessary length are produced and then used to form the reinforcement mesh 45. As is shown by way of example in
(47) The entire apparatus 25, 63 therefore operates very efficiently.
(48) The reinforcement mesh 45 can be used to produce a component 90, for example a concrete component. To this end, the reinforcement mesh 45 is incorporated in a matrix, in particular a cement matrix 91 of the component 90. Prior to the incorporation in the cement matrix 91, it is also possible to connect a number of reinforcement meshes to one another by means of the connecting material V (
(49) The invention relates to a method and an apparatus 25, 48, 63 for producing a reinforcement mesh 45. Here, a reinforcement fiber strand 29 is firstly saturated with a resin H and cured to form a cured, fiber-reinforced strand material 38. The strand material 38 present as an endless material is then cut lengthwise into bars 26, which are then used as longitudinal bars 46 or transverse bars 47 for forming the reinforcement mesh 45. A connecting material is used at each intersection point 64 between a longitudinal bar 46 and a transverse bar 47 and is dispensed in liquid form at the intersection point 64 or is liquefied and then cured at the intersection point 64. A fixed connection is thus created between the longitudinal bars 46 and the transverse bars 47 at the intersection points. Between the intersection points 64, the longitudinal bars 46 and the transverse bars 47 have portions that are free of connecting material V.
LIST OF REFERENCE SIGNS
(50) 25 apparatus 25 rod 27 storage device 28 reel 29 reinforcement fiber strand 30 conveying device 31 saturation station 32 deflection roll 33 bath 36 stripping station 37 curing station 38 strand material 39 braking device 40 cutting station 41 cutting device 45 reinforcement mesh 46 longitudinal bar 47 transverse bar 48 manipulator device 49 support surface 50 separating unit 51 storage container 52 dispensing shaft 53 slot-like opening 54 actuator 55 linear drive 56 slide 57 rail 60 gripper device 61 gripper finger 63 dispensing device 64 intersection point 65 pipe or line 69 metering device 70 mold 71 mold part 72 feed line 77 push-on connection part 78 longitudinal part 79 transverse part 80 clamping limb 81 slot 90 component 91 cement matrix H resin V connecting material x spatial direction Y spatial direction z spatial direction