JP2019210565A - Method for producing three-dimensional net-like structure, and three-dimensional net-like structure - Google Patents

Abstract

To simply and reliably bond nonwoven fabrics to a three-dimensional net-like structure.SOLUTION: In the process of placing nonwoven fabrics 6A and 6B on a pair of guide parts 3A and 3B, respectively, and moving them toward a coolant liquid surface 1a of a liquid coolant 1, a melted resin 22B heat-melted is extruded from a multi-hole die 24A on which melted-resin extrusion holes 24B are formed, thereby forming a plurality of melted threads 5A. The plurality of melted threads 5A are spirally dropped onto the coolant liquid surface 1a of the liquid coolant 1 in a state of being melted, and are stacked in a three-dimensional net-like shape while the melted threads 5A are heat-welded to one another, thereby forming a three-dimensional net-like structure 7A. At the same time, they are made to descend into the liquid coolant 1 at the same speed as the nonwoven fabrics 6A and 6B. In such a state that, while the melted threads 5A and the nonwoven fabrics 6A and 6B are brought into contact and welded, they are sandwiched between thickness-regulation plates 2A and 2B, they are cooled by the liquid coolant 1, thereby forming the solidified three-dimensional net-like structure 7A. Thus, the nonwoven fabrics 6A and 6B are welded to wide surfaces 7C and 7D of the three-dimensional net-like structure 7A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a three-dimensional network structure and a three-dimensional network structure in which a nonwoven fabric, a reinforcing network, or the like is thermally welded to the three-dimensional network structure in the process of manufacturing the three-dimensional network structure made of a synthetic resin.

  A manufacturing method in which a nonwoven fabric is welded in the process of forming this type of three-dimensional network structure is known. For example, in the manufacturing methods described in Patent Documents 1 and 2, a conveyor that conveys a material to be conveyed vertically downward is installed in a water tank, and the upper end of a belt conveyor or the like that advances the conveyor is up to a height at which the conveyor comes out of the water surface. Filled with water, installed one or two non-woven fabrics on a pair of conveyors, and advancing the conveyor downward while dropping a plurality of synthetic resin strips spirally vertically between the pair of conveyors. And solidify by cooling to produce a composite of a resinous three-dimensional network structure and a nonwoven fabric.

Japanese Patent Laid-Open No. 11-241263 JP-A-55-17527

  However, in the manufacturing methods of Patent Documents 1 and 2, the interval between the two nonwoven fabrics in the portion above the water surface is wider than the interval between the conveyors below the water surface, and a plurality of melting lines constituting the three-dimensional network structure. When the strips are accumulated in the vicinity of the water surface in the same thickness range as the interval between the two nonwoven fabrics and are welded and hardened together, a molded product that is larger than the interval between the conveyors is forced to pass through the conveyor. An excessive load is applied to the motor that moves the motor forward and the reduction gear installed on the way. In addition, when the maximum driving force of the power such as a motor is exceeded, the three-dimensional network structure cannot move forward, and it is considered that the continuously supplied molten filaments are hardened at the entrance of the conveyor. In particular, if the staying time on the water surface is increased in order to increase the welding strength with the nonwoven fabric, the staying time of the mesh constituent fibers that have not yet reached the equidistant region of the conveyor in the vicinity of the water surface is also increased, and the conveyor is evenly spaced. It is conceivable that a solid network structure that is thicker than the interval between the portions is formed, an excessive load is applied to the drive device of the conveyor, and the shape (thickness and mesh density) of the product becomes non-uniform.

  If the water level on the water surface is always kept constant and the water temperature cannot be kept constant, the cooling rate of the molten filaments changes, the position where the solid network structure cools and solidifies, and the thickness of the solidified structure Fluctuating, the burden on the motor for moving the conveyor forward, and the traveling speed fluctuate, making it difficult to stably produce a three-dimensional network structure having a uniform density and thickness. Depending on the case, it may be considered that it leads to a failure or breakage of a driving motor, a reduction gear, a conveyor or the like.

  Further, if the mesh density is increased, it tends to harden at the entrance of the conveyor, so the mesh density of the completed three-dimensional network structure is limited and it is difficult to increase the compressive strength.

  This invention is made | formed in view of this point, The place made into the objective is to couple | bond a nonwoven fabric to a three-dimensional network structure simply and reliably.

  In order to achieve the above object, in the present invention, a pair of guide portions is provided to reliably heat-bond the nonwoven fabric and the melted filament.

Specifically, in the first invention, a pair of thickness defining plates (2A, 2B) is installed in the liquid refrigerant (1) filled in the liquid storage tank (4),
A pair of guide portions (3A, 3B) is installed above the coolant level (1a) on the pair of thickness regulating plates (2A, 2B),
Adjusting the inner width of the lower ends of the pair of guide portions (3A, 3B) to be substantially equal to the inner width of the pair of thickness defining plates (2A, 2B);
In the process in which the nonwoven fabric (6A, 6B) is placed on the pair of guide portions (3A, 3B) and is advanced toward the coolant level (1a) of the liquid coolant (1),
The molten resin (22B) heated and melted is extruded from a plurality of porous molds (24A) having a molten resin extrusion hole (24B) to form a plurality of molten filaments (5A),
In a state where the plurality of molten filaments (5A) are melted, they are spirally dropped onto the refrigerant liquid surface (1a) of the liquid refrigerant (1), and the molten filaments (5A) are thermally welded to each other. The three-dimensional network structure (7A) is formed by stacking in a three-dimensional network while lowering into the liquid refrigerant (1) at the same speed as the nonwoven fabric (6A, 6B).
By cooling with the liquid refrigerant (1) in a state sandwiched between the thickness regulating plates (2A, 2B) while the molten filament (5A) and the nonwoven fabric (6A, 6B) are in contact and welded, Forming a solid three-dimensional network (7A);
It is set as the structure which welds a nonwoven fabric (6A, 6B) to the wide surface (7C, 7D) of the said three-dimensional network structure (7A), and manufactures a composite_body | complex (8A).

  According to the above configuration, the nonwoven fabric and the three-dimensional network structure are not drawn into the liquid refrigerant by a conveyor or the like, but the nonwoven fabric is guided by the guide portion while passing between the thickness regulation plates together with the three-dimensional network structure. A non-woven fabric is surely welded to the three-dimensional network structure, and a composite having a flat surface with a constant thickness and no undulation is obtained.

In the second invention, in the first invention,
The pair of guide portions are a pair of plate-like inclined plates (3A, 3B) or a pair of rod-shaped nonwoven fabric pulling bars,
The height of the lower end of the pair of guide portions is 0.5 mm or more and 200 mm or less from the refrigerant liquid level (1a).

  According to said structure, both are reliably welded by making a fusion filament and a nonwoven fabric contact at the position which is not too high in the position away from the refrigerant | coolant liquid level at least. Moreover, the welding force of a fusion filament and a nonwoven fabric can also be raised by keeping a certain distance.

In the third invention, in the first or second invention,
The non-woven fabric (6A, 6B) is made of a synthetic resin having an outer diameter of 10 to 200 μm and a thickness of 1 to 20 mm.

  According to said structure, the composite_body | complex with which the three-dimensional network structure for various uses was covered with the nonwoven fabric is obtained.

In a fourth invention, in any one of the first to third inventions,
The heat-melted molten resin (22B) is extruded from a porous mold (24A) having a molten resin extrusion hole (24B) having a thickness of 0.1 mm to 20 mm at a speed of 10 mm to 500 mm per second. The molten filament (5A) is 0.1 mm to 20 mm.

  According to said structure, the composite_body | complex with which the three-dimensional network structure for various uses was covered with the nonwoven fabric is obtained by supplying the molten filament which is not too thin and not too thick at an appropriate speed.

In a fifth invention, in any one of the first to fourth inventions,
Prior to contact with the molten filament (5A), a shielding plate (12A, 12B) for partitioning the molten filament (5A) and the nonwoven fabric (6A, 6B) on the upper surface of the nonwoven fabric (6A, 6B). Intermittently put in and out
Three-dimensional network of melted filaments (5A) stacked between the nonwoven fabrics (6A, 6B) while intermittently preventing welding of the nonwoven fabrics (6A, 6B) and the melted filaments (5A) at the outer edge of the wide surface. By continuously forming the structure (7A),
A composite body (8B) having a welding stop part (14A) in which the nonwoven fabric (6A, 6B) and the three-dimensional network structure (7A) are not partially welded at an arbitrary position is manufactured.

  According to said structure, when the welding stop part is cut and removed, the side surface of a three-dimensional network structure can be covered using the nonwoven fabric which has not been welded.

In a sixth invention, in the fifth invention,
While the welding of the nonwoven fabric (6A, 6B) and the molten filament (5A) is prevented using the shielding plate (12A, 12B), the thickness defining plate (2A, 2B) and the guide portion (3A, 3B) and the shielding plate (12A, 12B) are simultaneously lowered downward,
The lower end of the shielding plate (12A, 12B) is in a state below the liquid level of the liquid refrigerant (1) to prevent the welding of the nonwoven fabric (6A, 6B) and the molten filament (5A), and partially the nonwoven fabric (6A , 6B) and a three-dimensional network structure (7) are produced, and a composite body (8B) having a welding stop portion (14A) in which welding is not performed is produced.

  According to said structure, the composite_body | complex which has a welding stop part can be manufactured easily and reliably.

In a seventh invention, in any one of the first to fourth inventions,
Before the nonwoven fabric (6A, 6B) contacts the melted filament (5A), the liquid refrigerant (1) is dropped onto the nonwoven fabric (6A, 6B), and the nonwoven fabric (6A, 6B) contains the liquid refrigerant (1). While in contact with the molten filament (5A), the surface of the molten filament (5A) is cooled and is not thermally welded to the non-woven fabric (6A, 6B), while being thermally welded to the other molten filament (5A). By stacking in a three-dimensional network,
The solid network structure (7A) sandwiched between the nonwoven fabrics (6A, 6B) is continuously formed, and the nonwoven fabric (6A, 6B) and the solid network structure (7A) partially solidified are not welded. A composite body (8B) having a welding stop portion (14A) is produced.

  According to said structure, the composite_body | complex which has a welding stop part can be manufactured easily and reliably.

In the eighth invention, in the seventh invention,
Of the feed rollers (15A to 15D) and the feed drum (16A) for lowering the three-dimensional network structure (7) and the nonwoven fabric (6A, 6B) in the liquid refrigerant (1) at the time of forming the welding stop portion (14A). By rotating the progress speed faster than normal,
The three-dimensional network structure (7A) and the non-woven fabric (6A, 6B) are separated, and the adjacent molten filaments (5A) are independent without mutual welding, and are extended portions with a low network density that are easy to cut and remove ( 14E) is produced.

  According to said structure, the material cost of the part to cut and remove can be reduced, and a manufacturing speed can be accelerated. Moreover, since the extending portion has a low density of resin fibers, it can be easily cut with scissors or the like.

In the ninth invention, in the eighth invention,
At the time of forming the welding stop portion (14A), the traveling speed of the feed rollers (15A to 15D) and the feed drum (16A) is increased in the range of 5 times to 50 times the normal speed.

  According to said structure, material cost and manufacturing speed can be optimized by optimizing advancing speed.

In a tenth invention, in any one of the first to ninth inventions,
Instead of non-woven fabric, a reinforcing net (26A) made of synthetic resin, metal or carbon fiber or a perforated plate (26B) made of fiber reinforced resin or metal is welded to the molten filament (5A) to strengthen the reinforcing net ( 26A) or a perforated plate (26B) and a synthetic resin solid network structure (7A) (8D).

  According to said structure, the composite body of various uses is obtained easily.

In an eleventh invention, in any one of the first to tenth inventions,
Reinforced net (26A) made of synthetic resin, synthetic fiber, metal fiber or carbon fiber or made of fiber reinforced resin or metal on the upper surface of the nonwoven fabric (6A, 6B) to which the molten filament (5A) contacts. The three-dimensional network structure (7A) is constructed while the non-woven fabric (6A, 6B) and the reinforcing net (26A) or the perforated plate (26B) are advanced at the same speed while overlapping the perforated plates (26B). Lowering the molten filament (5A),
A composite (8E) having the reinforcing network (26A) or the perforated plate (26B) between the nonwoven fabric (6A, 6B) and the solidified three-dimensional network structure (7A) is produced.

  According to said structure, the composite_body | complex of various uses containing a reinforcement net | network or a perforated board can be manufactured easily and reliably.

In a twelfth invention, in any one of the first to eleventh inventions,
At least one of the composites (8A, 8B, 8C, 8D, 8E) is again inserted from above the guide part (3A, 3B),
It is set as the structure including the multilayer composite formation process which forms a multilayer composite (8G) by making it advance with the molten filament (5A) lowered | hung from the said porous metal mold | die (24A).

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

In a thirteenth aspect, in the twelfth aspect,
Repeat the multilayer composite formation step,
A multilayer composite (8G) of at least one of the nonwoven fabric (6A, 6B), the reinforcing net (26A) and the perforated plate (26B) and the three-dimensional network structure (7A) is formed.

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

In a fourteenth invention, in any one of the first to twelfth inventions,
When forming the composite of the three-dimensional network structure (7A) by lowering the molten filament (5A) from the porous mold (24A), one of the pair of wide surfaces having a larger area than the other side surfaces is provided. The nonwoven fabric (6A, 6B), the reinforcing net (26A) or the perforated plate (26B) is not inserted, the guide portion (3A, 3B) is not installed above the coolant level (1a), and the outer surface is nonwoven fabric. The multilayer composite (8H) is formed as a three-dimensional network structure (7A) that is not covered with (6A, 6B).

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

In the fifteenth invention,
The mold base (23A) on which the porous mold (24A) is mounted is provided with an outside air through-cavity (23C) through which the outside air circulates in the vertical direction, and the nonwoven fabric (6A, 6B), reinforced net (26A), perforated plate (26B) and composite (8A),
The nonwoven fabric is made to advance by bringing it into contact with the molten filament (5A) that descends while drawing a spiral from the porous mold (24A) disposed on both sides of the outside air penetration cavity (23C), while drawing a spiral. (6A), at least one of the reinforcing network (26A) and the perforated plate (26B) and the three-dimensional network structure (7A) are formed at the same time as a multilayer composite (8I).

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

In a sixteenth invention, in any one of the first to fifteenth inventions,
The said nonwoven fabric (6A, 6B) is a spunbonded nonwoven fabric which does not melt | fuse between constituent fibers.

  According to the above configuration, even if the needle on the surface of the feed drum penetrates the nonwoven fabric, the nonwoven fabric constituent fiber is not cut off, it is only shifted laterally, the nonwoven fabric strength is not reduced, and the laterally displaced fiber is in its original position. If it returns, it is advantageous at the point which can exhibit the original filtration performance of a nonwoven fabric.

  In the seventeenth invention, a thermoplastic resin containing any one of polypropylene, polyethylene, ethylene propylene rubber, polyolefin elastomer, and ethylene vinyl acetate copolymer is laminated in a three-dimensional network by heat-sealing spiral fused filaments. A reinforcing net (26A) made of synthetic resin, synthetic fiber, metal fiber or carbon fiber or a perforated plate (26B) made of fiber reinforced resin or metal is formed on at least one surface of the three-dimensional network structure (7A). It is a welded composite (8D).

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

  In the eighteenth invention, at least one surface of the three-dimensional network structure (7A) in which spiral fused filaments are heat-welded with each other and stacked in a three-dimensional network form is made of synthetic resin, synthetic fiber, metal fiber or carbon fiber. It is a multilayer composite (8G) in which a reinforced net (26A) or a fiber-reinforced resin or metal perforated plate (26B) and a nonwoven fabric (6A, 6B) are laminated.

  According to said structure, the multilayer composite_body | complex of various uses is obtained easily.

  As described above, according to the present invention, the nonwoven fabric can be easily and reliably bonded to the three-dimensional network structure.

It is a schematic front view which shows the whole manufacturing apparatus of the solid network structure based on Embodiment 1 of this invention. It is a schematic front view which expands and shows an inclination board, a thickness prescription | regulation board, and its periphery. It is a front view which shows an inclination board, a thickness prescription board, and a width prescription board. It is a side view which shows an inclination board, a thickness regulation board, and a width regulation board. It is a front view which shows the composite_body | complex in process. It is a front view which shows a composite_body | complex when forming an extending part. It is a disassembled front view when the extending part is cut | disconnected. FIG. 3 is a view corresponding to FIG. 2, illustrating a partially enlarged manufacturing apparatus according to Modification 1 of Embodiment 1; It is a front view which expands and shows the outline of the inclination board and shielding board which concern on the modification 1 of Embodiment 1. FIG. It is a front view which expands and shows the outline of the inclination board of another form which concerns on the modification 1 of Embodiment 1, and a shielding board. It is a side view which shows the complex in process which concerns on the modification 3 of Embodiment 1. FIG. FIG. 10 is a plan view showing a complex being processed according to Modification 3 of Embodiment 1. It is a front view which expands and shows the outline of the inclination board which concerns on Embodiment 2, a shielding board, and its periphery. It is a front view which expands and shows the outline of the inclination board which concerns on the modification of Embodiment 2, a shielding board, and its periphery. It is a perspective view which expands and shows the pressing plate which concerns on the modification of Embodiment 2. FIG. It is a front view which expands and shows the perforated board which concerns on Embodiment 2. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
-Production equipment configuration-
As shown in FIG. 1 and FIG. 2 showing a manufacturing apparatus 50 according to Embodiment 1 of the present invention, first, a liquid storage tank 4 storing a liquid refrigerant 1 such as water is prepared. The liquid refrigerant 1 may be an aqueous solution containing additives in addition to water. An extruder 20 for supplying the heated and melted resin is disposed above the refrigerant liquid level 1a of the liquid refrigerant 1. This extruder 20 is configured to be able to heat and melt a thermoplastic resin containing any of polypropylene, polyethylene, ethylene propylene rubber, polyolefin elastomer, ethylene vinyl acetate copolymer, etc., and this molten resin 22B is made into a porous mold. For example, it is configured to extrude at a thickness of 0.1 mm or more and 20 mm or less from, for example, 10 to 100,000 molten resin extrusion holes 24B opened in 24A. In the present embodiment, the distance H1 from the blowing surface 24C of the melted filament 5A of the porous mold 24A to the refrigerant liquid surface 1a of the liquid refrigerant 1 is set to 0.5 mm to 200 mm, for example (0.5 mm ≦ H1 ≦ 200 mm). ).

  Although not shown in detail, the heated liquid refrigerant 1 is pumped up by a refrigerant pump, sent to a refrigerant cooling device, cooled to a specified temperature, and then used again for cooling the molten filament 5A and the three-dimensional network structure 7A. . If the refrigerant is water, use water supply or groundwater, inject it from the refrigerant supply port in the liquid storage tank A, drain all the hot water after use, or cool and reuse part of it And it inject | pours from a refrigerant | coolant supply port (not shown) for the cooling of 5 A of molten filaments.

  In this embodiment, in order to supply nonwoven fabric 6A, 6B to the refrigerant | coolant liquid surface 1a side of the liquid storage tank 4, the nonwoven fabric roll 6D around which nonwoven fabric 6A, 6B was wound is arrange | positioned suitably. The nonwoven fabrics 6A and 6B may be supplied at a predetermined speed while being appropriately guided by the nonwoven fabric supply roller 6E. The nonwoven fabrics 6A and 6B are made of a synthetic resin having an outer diameter of 10 μm or more and 200 μm or less and a thickness of 1 mm or more and 20 mm or less, and the same material as the thermoplastic resin in the extruder 20 or easily welded to each other. Is suitable.

  Therefore, the molten resin 22B in a melted state from the extruder 20 is spirally dropped onto the refrigerant liquid surface 1a, and the fibers are thermally welded to each other and stacked to contact the outer peripheral molten filament 5A. It is lowered into the liquid refrigerant 1 at the same speed as the non-woven fabrics 6A and 6B passing through the position, and the melted wire 5 is firmly welded to the non-woven fabrics 6A and 6B in the air before the outer edge melted line 5 sinks to the refrigerant liquid surface 1a. The composite 8A of the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A, in which the strips 5 are firmly bound, can be formed.

  In this embodiment, so that the thickness of the composite 8A of the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A does not fluctuate, and the completed composite 8A becomes a flat composite 8A without undulation or the like. Thickness defining plates 2A and 2B for defining the thickness are installed. As shown in FIGS. 3A and 3B, in addition to the thickness defining plates 2A and 2B, width defining plates 2C and 2D for making the width constant may be installed.

  In this embodiment, the thickness defining plates 2A and 2B and the width defining plates 2C and 2D have a length in the depth direction vertical direction of, for example, 3 cm or more, and feed rollers 15A to 15D and feed drums that advance the composite 8A. 16A is placed under these thickness regulating plates 2A and 2B and width regulating plates 2C and 2D, and after the composite 8A is cooled and solidified in the liquid refrigerant 1 in a flat state with a constant thickness and width, It is sandwiched between rollers 15A to 15D and feed drum 16A so as to move forward.

  The nonwoven fabrics 6A and 6B and the melted filament 5A are continuously supplied from above the thickness defining plates 2A and 2B and the width defining plates 2C and 2D, and the feed rollers 15A to 15D and the feed drum 16A continue to rotate. The composite 8A in which the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A are continuously welded to each other is continuously formed.

The feed rollers 15A to 15D and the feed drum 16A for advancing the composite 8A provided in the liquid storage tank 4 have a diameter of, for example, 10 cm to 3 m, and have, for example, fine irregularities of 1 mm to 5 mm on the surface. or put a rubber sheet, the following thickness 0.5mm 2mm or more on the surface before and after both or one of the feed rollers 15A-15D, placed side by side ten following needle 30mm or more in length 2mm from two per area 1 cm ² Further, slipping between the feed rollers 15A to 15D and the feed drum 16A and the composite body 8A is prevented, the propulsion force of feed is reliably transmitted to the composite body 8A, and the thickness and density of the composite body 8A are kept uniform. When the feed rollers 15A to 15D and the feed drum 16A are made of metal, friction between the composite 8A and the drum surface may be increased by knurling to prevent slippage.

  The completed composite 8A may be distinguished from the surface that is in contact with the drum surface with the needle, and the installation front and back may be distinguished depending on the use of the composite 8A. For example, when the composite 8A is used for filtration removal of particles in the liquid, when preliminarily removing large particles, the surface in contact with the nail drum is directed to the upstream side of the filtered water flow to remove the large particles. Later, the nonwoven fabric 6A, 6B on the other side can be used for a method of filtering and removing finer particles.

  Further, if the drum contact surface with the needle is used as a machine installation surface other than the filter application surface or an adhesive fixing surface to the wall surface, there is a large difference in the degree of decrease in strength of the nonwoven fabrics 6A and 6B on the surface in contact with the needle drum surface. If there is no, it can be used. When the needle length is shorter than the thickness of the non-woven fabric 6A, 6B, and when there is no significant difference in the filtration performance, it is possible to treat the needle contact surface and the non-contact surface equally.

  Further, when the feed drum 16A is a drum having a larger diameter than the feed rollers 15A to 15D, the radius of curvature increases as the drum diameter increases, the bend becomes loose, and the finished composite 8A is less likely to be bent. In addition, since the contact area between the composite 8A and the drum increases, the displacement between the composite 8A and the feed drum 16A is reduced.

  As will be described later, in order to reduce the mesh density for cutting the composite 8C halfway, the composite 8C may be taken up at a speed of up to 10 times the normal take-up speed. Even in such a case, slipping with the composite 8C is less likely to occur, and taking over with a large diameter drum that increases the contact area is advantageous.

  As shown in FIG. 1, a composite advancing guide 17A for preventing the composite 8A from being caught may be provided between the feed roller 15A and the feed roller 15B and between the roller 15C and the roller 15D.

  Further, the nonwoven fabrics 6A and 6B lowered together with the melted filaments 5A constituting the three-dimensional network structure 7A are spunbond nonwoven fabrics that do not fuse the constituent fibers of the nonwoven fabrics 6A and 6B, so that the needles on the drum surface are nonwoven fabrics. Even if it penetrates 6A and 6B, the non-woven fabric constituent fibers will not be cut and will only be shifted to the side, and the non-woven fabrics 6A and 6B will not be reduced in strength. This is advantageous in that the original filtration performance can be exhibited.

  In the large-diameter feed drum 16A, as the drum diameter increases, the radius of curvature increases, the curve becomes loose, the resulting complex 8A is less likely to bend, and the contact area between the complex 8A and the drum increases. Therefore, the deviation between the composite 8A and the drum is also reduced. As will be described later, there is a case where the composite 8A is pulled at a speed of up to 50 times the normal take-off speed in order to reduce the mesh density for halfway cutting. Taking up with a large-diameter drum in which the contact area is large and the contact area is large is advantageous.

  Instead of using the large-diameter feed drum 16A, a plurality of small-diameter feed drums are used and arranged along the path through which the composite 8A or the like that has been formed passes, or a needle or rubber protrusion is provided on one side of the belt or chain. This can be done by arranging and driving the attached ones. In the large-diameter feed drum 16A, the feed drum 16A that has come out on the surface of the coolant is in the way, but in the small-diameter drum, belt, and chain, if only the portion that holds the composite 8A is in the liquid refrigerant 1, the cooling of the composite 8A The space on the coolant liquid level 1a can be used as a space for other machine parts, which is advantageous in designing the manufacturing apparatus 50.

-Composition of inclined plate-
Furthermore, in this embodiment, as shown in FIGS. 2 to 3B, a porous mold 24A for forming a melted line 5A on two sheets below the liquid refrigerant liquid level and a pair of thickness defining plates 2A, 2B; In the meantime, the inclined plates 3A and 3B are installed as guide portions for allowing the nonwoven fabrics 6A and 6B to enter the refrigerant liquid surface at a constant angle.

  In the present embodiment, the upper ends of the thickness regulating plates 2A, 2B and the lower ends of the inclined plates 3A, 3B are disposed above the refrigerant liquid surface 1a, for example, by a height of 0.5 mm or more and 200 mm or less, and the molten filament 5 Before the accumulated three-dimensional network-like structure 7A is cooled to the liquid refrigerant 1, the composite 8A having a constant width and a constant thickness is obtained by advancing between the thickness defining plates 2A and 2B and the width defining plates 2C and 2D. Can be formed.

  Further, if the structure is such that the inclination angle of the nonwoven fabric contact portion of the inclined plates 3A and 3B above the refrigerant liquid surface 1a can be adjusted in the range of 5 to 80 degrees with respect to the horizontal, the outer edge of the wide surface is melted by adjusting the angle. Adjusting the contact length when the filament 5A and the nonwoven fabrics 6A and 6B are in contact with each other, adjusting the number of fibers to be welded, and adjusting the lamination state of the three-dimensional network structure 7A at the time of cooling and solidifying in the liquid refrigerant 1 Is possible.

  As shown in FIG. 2, a certain amount of the liquid refrigerant 1 heated by the melted filament 5A is provided at the height portions near the refrigerant liquid surface 1a at the upper ends of the thickness regulating plates 2A and 2B and the lower ends of the inclined plates 3A and 3B. Are provided outside the thickness regulating plates 2A and 2B, and slits 10A and 10B are provided for keeping the refrigerant temperature constant. Although not shown in detail, a movable shutter may be attached so that the opening area of the slits 10A and 10B, the opening width in the horizontal direction, and the opening width in the vertical direction can be adjusted.

  Although not particularly illustrated, as a method for effectively reducing the temperature of the liquid refrigerant 1 in the portion sandwiched between the thickness defining plates 2A and 2B and the width defining plates 2C and 2D, a part of the thickness defining plates 2A and 2B is used. A refrigerant passage hole may be formed, a refrigerant delivery pipe may be connected to the refrigerant passage hole, and the liquid refrigerant 1 may be sent out from the pipe between the thickness regulating plates 2A and 2B. By controlling the temperature of this portion, it is possible to cope with the difference in hardness depending on the melting temperature and the cooling rate of the thermoplastic resin used for the molten filament 5A.

  Conversely, the heated liquid refrigerant 1 collected in the composite 8A in the region sandwiched between the thickness regulating plates 2A and 2B is sucked from the refrigerant passage hole and sent to the refrigerant cooling device via the refrigerant delivery pipe. There is also a method of returning to the liquid storage tank after being cooled. With this method, the nonwoven fabric 6A, 6B on the surface of the composite 8A is sucked into the thickness regulating plates 2A, 2B when the heated liquid refrigerant 1 is sucked, which contributes to stabilization of the thickness of the composite 8A. .

−Configuration of shielding plate−
As shown in FIG. 2, shielding plates 12A and 12B are movably provided above the inclined plates 3A and 3B at predetermined intervals from the inclined plates 3A and 3B. The shielding plates 12A and 12B may be made of a fluororesin plate or may be coated with a fluororesin-processed Teflon coating or the like so that the melted strip 5A at the outer edge of the wide surface does not adhere (Teflon is a registered trademark).

  A refrigerant dropping pipe 12E is disposed on the shielding plates 12A and 12B. The liquid refrigerant 1 is allowed to flow on the surfaces of the shielding plates 12A and 12B, and the melted strip 5A on the outer edge of the wide surface in contact with the surfaces. Only a side surface is cooled, and a welding stop portion 14A that does not cause welding with the nonwoven fabrics 6A and 6B is provided.

  The forward speed when the shielding plates 12A and 12B are advanced along the inclined plates 3A and 3B and moved onto the nonwoven fabrics 6A and 6B is the same as the traveling speed of the nonwoven fabrics 6A and 6B. In addition, it is preferable that the melted strip 5A at the outer edge of the wide surface being welded is not disturbed by the shielding plates 12A and 12B.

  In order to restart mutual welding of the nonwoven fabrics 6A and 6B and the melted filament 5A at the outer edge of the wide surface, the retreating speed for retracting the shielding plates 12A and 12B depends on the type and melting temperature of the molten resin 22B constituting the three-dimensional network structure 7A. Thus, the speed is adjusted in the range of 3 mm / sec to 300 mm / sec.

  In addition, the melted strip 5A at the outer edge of the wide surface cooled by the liquid refrigerant 1 exiting from the shielding plates 12A, 12B, etc. is a limited portion in contact with the shielding plates 12A, 12B in the outer peripheral portion of the many melted strips 5A. Most of the remaining molten filaments 5A are entangled and welded before reaching the liquid level of the liquid refrigerant 1 without being cooled, and therefore the influence on the strength of the cooled three-dimensional network structure 7A is as follows. Few.

-Procedure for producing the composite-
First, the extruder 20 equipped with the porous metal mold 24A is moved away from the liquid storage tank 4 so that the thickness regulating plates 2A and 2B and the inclined plates 3A and 3B thereon can be seen in the liquid storage tank 4. The liquid refrigerant 1 is previously extracted from the liquid storage tank 4.

  A tip mat (not shown) of the three-dimensional network structure 7A having the same thickness and width as the three-dimensional network structure 7A of the composite 8A to be prepared in advance is manufactured by another apparatus. The length of the front end mat is a length that reaches the outlet auxiliary drum 31 at the outlet of the liquid storage tank from the thickness regulating plates 2A and 2B through the feed drum 16A.

  The leading ends of the nonwoven fabrics 6A and 6B drawn from the nonwoven fabric roll 6D are fixed to the leading end mat with a wire or a double-sided tape, and are passed between the thickness regulating plates 2A and 2B in the liquid storage tank 4 to feed rollers 15A to 15D. Or after feeding into the feed drum 16A, a motor (not shown) for driving the feed rollers 15A to 15D and the feed drum 16A is driven and passed between the feed drum 16A and the feed drum outer periphery product presser (not shown). When the outlet auxiliary drum 31 is reached, the driving is stopped once.

  Next, the extruder 20 that has been withdrawn once is returned to a predetermined position.

  Next, the horizontal positions of the porous mold 24A and the two thickness defining plates 2A and 2B are adjusted.

  Next, the liquid storage tank 4 is filled with the liquid refrigerant 1, and the temperature is raised with a heater or the like to the temperature most suitable for the production of the composite 8A. When the temperature is too high, the liquid refrigerant 1 that has been cooled in another place is added.

  Next, the extruder 20 is operated to drop the molten filament 5A from the porous mold 24A. The front end of the melted filament 5A is stacked on a front end mat that is exposed to the refrigerant liquid level 1a on the liquid storage tank 4, and the feed drum 16A is actuated after resting for a few seconds.

  Next, for several seconds, the melted filament 5A comes into contact with the tip mat and the nonwoven fabrics 6A and 6B, and melts and solidifies with each other. At the same time, the tip mat and nonwoven fabrics 6A and 6B are advanced by the rotating rollers 15A to 15D and the feed drum 16A. A new three-dimensional network structure 7A is formed by the molten filament 5A descending while drawing a spiral, and the composite surface 8A is formed by mutually welding the wide surface outer edge molten filament 5A of this three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B. Is continuously produced. At this time, the traveling outer peripheral speed of the feed rollers 15A to 15D and the feed drum 16A is adjusted in the range of 1/3 to 1/50 of the descending speed of the melted filament 5A, and the mesh of the three-dimensional network structure 7A to be manufactured. Adjust the density.

  When the three-dimensional network structure 7A is formed, before the nonwoven fabrics 6A and 6B come into contact with the melted filament 5, the nonwoven fabric roll 6D wound with the nonwoven fabrics 6A and 6B is pulled in a reverse direction with a constant tension. Thus, by maintaining the thickness forming region of the three-dimensional network structure 7A formed inside the thickness defining plates 2A and 2B at a constant width, the completed composite 8A has a constant thickness. The tensile force is adjusted in the range of 50 N to 2 kN in terms of 1 m width in the direction opposite to the traveling direction of the composite 8A (reverse direction), and is based on a feed drum or the like. As an adjustment method, the nonwoven fabrics 6A and 6B are sandwiched between drums with rubber (not shown) equipped with a torque limiter (not shown) in the nonwoven fabric supply area, or the torque limiter is attached to the rotating shaft to which the nonwoven fabric roll 6D is attached. Further, there is a method of adjusting the torque at which the torque limiter starts to slide and making the tensile force of the nonwoven fabric constant.

  Here, in order to continuously supply the non-woven fabrics 6A and 6B, the non-woven fabric product is prepared with a non-woven fabric roll 6D having a winding length of 50 m or 100 m, and the non-woven fabric roll 6D of the non-woven fabric 6A or 6B is prepared for one day before the production of the composite 8A. To produce a continuous product with a length of production, it is connected with adhesive tape. In order to avoid fluctuations in the thickness of the composite 8A due to the overlapping of the nonwoven fabrics 6A and 6B and the thickness of the internal three-dimensional network structure 7A, the nonwoven fabrics 6A and 6B are not overlapped but are abutted and adhesive tape is used for connecting the seams. Is used. The application surface of the adhesive tape is the outer surface of the completed composite 8A on the opposite side of the surface to which the wide surface outer edge fused filament 5A contacts, and is peeled off after the formation of the composite 8A.

  In addition, after manufacturing the composite 8A, the non-woven fabrics 6A and 6B having a constant width may be added from above the butted portions so that fine particles such as soil do not penetrate from the butted surfaces of the nonwoven fabrics 6A and 6B. Adhesive may be used for pasting, or the non-woven fabrics 6A and 6B may be pasted together by a melted filament extruded with another thermoplastic resin extruder and a porous mold.

  Specifically, the nonwoven fabrics 6A and 6B proceed while approaching the melted filament 5A in the air above the refrigerant liquid level 1a and are heated and melted before entering the refrigerant liquid level 1a. The fibers constituting the non-woven fabrics 6A and 6B and the melted strip 5A having a wide surface constituting the three-dimensional network structure 7A are welded to each other in contact with the melted strip 5A at the outer edge of the wide surface in the row close to the wide surface in the strip 5A. Or, after the wide surface of the melted filament 5A surrounds the entire circumference of one or a plurality of fibers constituting the nonwoven fabrics 6A and 6B, it enters the liquid refrigerant 1 and is cooled and solidified to form a welded portion 13A. .

  Further, the melted filaments 5A located inside the group that do not contact the nonwoven fabrics 6A and 6B are adjacent to the melted filaments 5A adjacent to each other while falling from the porous mold 24A toward the refrigerant liquid surface 1a while drawing a spiral. Alternatively, a solid three-dimensional network structure 7A is formed by being entangled with the melted filament 5A on the outer edge of the wide surface, and welded to each other and solidified in the refrigerant.

  The nonwoven fabrics 6A and 6B and the wide surface melt filament 5A are not cooled by the liquid refrigerant 1 between the height difference 2 mm to 30 mm from the refrigerant liquid level 1a to the upper ends of the thickness regulating plates 2A and 2B. The wide surface melted filament 5A and the internal melted filament 5A are welded to each other in a melted state while passing between the thickness regulating plates 2A and 2B. A composite 8A having a thickness can be formed.

  After the start of production, the temperature of the liquid refrigerant 1 is increased by the heat of the molten resin 22B. Therefore, attention is paid to the temperature change of the liquid refrigerant 1, and the cooled liquid refrigerant 1 is supplied to the liquid storage tank 4 as necessary.

  The composite 8A that has come out of the liquid storage tank 4 is cut at the stretched portion of the mesh, and is put into a dryer to evaporate and remove the liquid refrigerant 1.

-Formation of independent isolation regions-
In this embodiment, the shielding plates 12A and 12B are temporarily inserted on the portions where the nonwoven fabrics 6A and 6B and the molten filaments 5 are in contact with each other with the inclined plates 3A and 3B, and the molten filaments 5 and the nonwoven fabrics 6A and 6B are inserted. By preventing welding, the solid network structure 7A in which the melted filaments 5A are accumulated and solidified and the nonwoven fabrics 6A and 6B are not welded to form a welding stop portion 14A, and only a part of the nonwoven fabrics 6A and 6B, or a solid network structure. It is possible to cut out only a part of the structure 7A independently or leave one of them.

  In the present embodiment, the melted strip 5A and the nonwoven fabric 6A, 6B at the outer edge of the wide surface are obtained only by the back-and-forth movement of the substantially planar shielding plates 12A, 12B at an angle approximate to that of the inclined plates 3A, 3B having a constant tilt angle. Can be isolated, and the operation is simple, and an easy and easy mechanism is possible.

  During the operation of the manufacturing apparatus 50, the nonwoven fabrics 6A and 6B are in contact with and welded to the melted strips 5A on the outer edges of the wide surfaces on the inclined plates 3A and 3B. Shield plate 12A, 12B is brought close to the upper surface on inclined plates 3A, 3B away from melted filament 5A at the outer edge of wide surface of 6B, and wide surface together with non-woven fabric 6A, 6B at the same speed as that of non-woven fabric 6A, 6B. The shield plates 12A and 12B are stopped when the outer ends of the melted filaments 5A are approached and the lower ends of the shield plates 12A and 12B reach directly above the thickness defining plates 2A and 2B. Even while the shielding plates 12A and 12B are stopped, the feed rollers 15A to 15D and the feed drum 16A for advancing the composite are operated so that the nonwoven fabrics 6A and 6B and the welded portions 13A welded to the nonwoven fabrics 6A and 6B are provided. Move forward continuously.

  As shown in FIG. 4, the contact between the nonwoven fabrics 6A and 6B on the inclined plates 3A and 3B and the melted filament 5A at the outer edge of the wide surface is temporarily blocked, and the melted filaments at the outer periphery of the nonwoven fabric 6A and 6B and the wide surface are The contact with 5A is prevented, and the non-woven fabrics 6A, 6B are not welded, and the melted filaments 5A are accumulated and welded together to form only the three-dimensional network structure 7A, whereby the nonwoven fabric 6A, A composite body 8B including a welding stop portion 14A having a network-structure independent portion 14B in which 6B and the three-dimensional network structure 7A are separated is obtained.

  In addition, since the nonwoven fabrics 6A and 6B are not welded to the network structure independent portion 14B, the independent network structure independent portion 14B can be cut out to leave the nonwoven fabric surplus portion 14D of only the nonwoven fabric.

  This non-woven fabric surplus portion 14D is a building to be embedded in the ground. When the composite 8A is pasted on the vertical wall surface of the building to remove the soil water, In order to prevent the invasion of earth and sand into the water passage space, or to wrap the end portion on the nonwoven fabric 6 of the adjacent composite 8B, in order to prevent the invasion of earth and sand at the joint portion between the composites 8B, It can be used for applications such as fixing with an adhesive.

-Formation of the extended part-
While the shielding plates 12A and 12B are inserted, the traveling speeds of the feed rollers 15A to 15D and the feed drum 16A for advancing and lowering the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B in the refrigerant liquid are temporarily set at normal times. As shown in FIGS. 5A and 5B, the melted filament 5A constituting the continuous three-dimensional network structure 7A extends to form an extended portion 14E having a coarse density. It can have. Further, since the shielding plates 12A and 12B are interposed between the nonwoven fabrics 6A and 6B and the melted strip 5A at the outer edge of the wide surface, the melt strip 5A at the outer edge of the wide surface has a welding stop portion 14A that is not welded to the nonwoven fabrics 6A and 6B. A composite 8C is obtained. For this reason, when cutting the composite 8C at this portion, it is possible to selectively use a blade suitable for the nonwoven fabrics 6A and 6B and a blade suitable for the three-dimensional network structure 7A, and the composite 8C can be easily cut. .

  Further, in the extended portion 14E corresponding to the network structure independent portion 14B, even if the three-dimensional network structure 7A is cut, the resin amount of the cutting loss may be small. In addition, since the density of the resin fibers is low, it can be easily cut with scissors or the like.

  After the extension, the traveling speed of the feed rollers 15A to 15D and the feed drum 16A is returned to the speed at the time of forming the normal density mesh, and after a certain time, the shielding plates 12A and 12B are retracted and the nonwoven fabrics 6A and 6B and the outer edges of the wide surfaces are If the molten filament 5A is brought into contact, the welded portion 13A in which the nonwoven fabrics 6A and 6B are welded to the surface of the three-dimensional network structure 7A having a constant width, a constant thickness, and a constant density, as before insertion of the shielding plates 12A and 12B. Is formed again. For this reason, even if there is the extended portion 14E, continuous production is possible without stopping the machine.

  Then, if the extending portion 14E is cut off, the remaining welded portion 13A has a uniform mesh density over the entire area, and a composite 8A having a non-woven fabric surplus portion 14D composed of only the non-woven fabric 6A and 6B is obtained at the periphery. This composite 8A can be used for covering the seam portion when the uncovered side surface of the welded portion 13A is covered or the composite 8A is connected and installed.

  While the non-woven fabrics 6A and 6B and the melted filament 5 are separated using the shielding plates 12A and 12B, the non-woven fabrics 6A and 6B are continuous in the extended portion 14E and the normal mesh density portion. If the three-dimensional network structure 7A is cut out, a part of the network structure independent part 14B separated and independent from the nonwoven fabrics 6A and 6B is cut, and the nonwoven fabric independent portion 14C of the continuous nonwoven fabric is cut in the middle of the extended portion 14E. In the composite 8A, the density of the internal three-dimensional network structure 7A is uniform, and the composite 8A having the nonwoven fabric surplus portions 14D at both ends in the length direction can be obtained.

  In the extended portion 14E where the mesh structure is elongated, the contact pressure between the feed rollers 15A to 15D and the feed drum 16A and the composite is lowered due to the reduction of the mesh density, and the driving force of the feed rollers 15A to 15D is increased by the three-dimensional network structure 7A. The feed rollers are arranged in two or more rows, and the distance between the individual rollers is wider than the length of the sparse part, so that the feed force is applied to the composite at two or more locations. It is desirable. Alternatively, a method of increasing the contact length between the feed drum 16A and the composite by using the feed drum 16A having a large outer diameter whose contact length with the composite is longer than the length of the vacant portion, and having the composite along the drum cylinder. There is also.

  Therefore, according to the manufacturing method according to the present embodiment, the nonwoven fabrics 6A and 6B can be easily and reliably bonded to the three-dimensional network structure 7A. Moreover, in the civil engineering field, a filtration unit that mainly captures particles in the liquid with the water-permeable nonwoven fabrics 6A and 6B and guides only the filtered water and liquid to the water flow space of the three-dimensional network structure 7A having an internal space. In the process of manufacturing the drainage material and the water permeable material, the formation of the three-dimensional network structure 7A and the welding of the nonwoven fabrics 6A and 6B can be performed simultaneously. Furthermore, by adjusting the shielding plates 12A and 12B, the joining location of the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A and the area of the joining portion can be freely changed.

-Modification 1 of Embodiment 1-
6 to 7A show a first modification of the first embodiment of the present invention, which differs from the first embodiment in that the inclined plates 3A and 3B as the guide portions are different in shape and the shielding plates 12F and 12G are different in shape. Different. In addition, in each following modification and each embodiment, the same code | symbol is attached | subjected about the same part as FIGS. 1-5B, and the detailed description is abbreviate | omitted.

  That is, in this modification, the shielding plates 12F and 12G are hollow, and the liquid refrigerant 1 is allowed to pass through the inside.

  Specifically, as shown in FIG. 7A, at the lower ends of the shielding plates 12F and 12G, a large amount of the refrigerant outflow holes 12H are opened and an appropriate amount of the liquid refrigerant 1 is taken out, and the liquid refrigerant 1 is infiltrated into the nonwoven fabrics 6A and 6B. The welding stop portion 14A is surely provided by preventing welding with the melted filament 5A on the outer edge of the wide surface.

  Alternatively, as shown in FIG. 7B, a plurality of refrigerant outflow holes 12H are formed on the upper surfaces of the shielding plates 12F and 12G to allow the liquid refrigerant 1 to flow out of the refrigerant outflow holes 12H. The side surface of this is cooled in advance so as to reliably provide the welding stop portion 14A.

  Furthermore, in this modified example, vertical flat plates 3C and 3D are added to the lower ends of the inclined portions of the inclined plates 3A and 3B, and as shown in FIG. 6, the connecting portion (folding) connecting the inclined plates 3A and 3B and the vertical flat plates 3C and 3D. The height of the (curved portion) can be adjusted as appropriate between the liquid level height of the refrigerant liquid level 1a and a position higher by 5 to 30 mm. Thereby, before the molten filament 5A is cooled by the liquid refrigerant 1, the nonwoven fabrics 6A and 6B and the molten filament 5A at the outer edge of the wide surface are sufficiently welded, and the molten filament 5A is cooled in the liquid refrigerant 1. By being sandwiched between the vertical flat plates 3C and 3D and the thickness defining plates 2A and 2B before being solidified, the composite 8A has the same effect as the distance between the pair of thickness defining plates 2A and 2B. Can do.

-Modification 2 of Embodiment 1
Modification 2 of Embodiment 1 of the present invention differs from Embodiment 1 in that the configuration of the guide portion is different.

  Although not particularly illustrated, in this modification, the non-woven fabrics 6A and 6B are disposed between the pair of thickness regulating plates 2A and 2B below the refrigerant liquid level 1a and the porous mold 24A that forms the melted filament 5A. A non-woven fabric pulling rod is installed as a guide for entering the refrigerant liquid surface 1a at a certain angle.

  In this way, the nonwoven fabric 6A, 6B and the wide surface melted filament 5A are not cooled by the liquid refrigerant 1 between the height difference 0.5mm to 200mm from the refrigerant liquid surface 1a to the upper end of the nonwoven fabric pulling rod, A certain thickness is obtained by passing through the non-woven pulling rod while the wide surface melt filament 5A and the internal melt filament 5A are welded to each other in a melted state while being in contact with each other over time and firmly welding. The composite 8A can be formed.

  If the inclination angle of the nonwoven fabric contact portion above the refrigerant liquid surface 1a can be adjusted within a range of 5 to 80 degrees with respect to the horizontal, the melted strip 5A and the nonwoven fabric 6A at the outer edge of the wide surface are adjusted by the angle adjustment. It is possible to adjust the contact length when 6B comes into contact and the number of fibers to be contact-welded, and to adjust the stacked state of the three-dimensional network structure 7A when cooled and solidified in the liquid refrigerant 1.

-Modification 3 of Embodiment 1-
Modification 3 of Embodiment 1 of the present invention differs from Embodiment 1 in that the configuration of the shielding plate is different.

  As shown in FIGS. 8A and 8B, the constant width of the composite is obtained by continuously shielding only a certain width of the nonwoven fabrics 6A and 6B on the inclined plates 3A and 3B continuously with a continuous shielding plate (not shown). Thus, it becomes possible to manufacture a composite having a nonwoven fabric surplus portion 14D (see FIG. 4B) in which the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B are continuously separated in the length direction. Depending on the place of use and conditions, the non-woven fabric 6A, 6B can be left as it is after cutting the width of the three-dimensional network structure 7A in the completed composite.

(Embodiment 2)
FIG. 9 shows a second embodiment of the present invention, which differs from the first embodiment in that a reinforcing net 26A, a perforated plate 26B and the like are further provided.

-Manufacturing procedure-
First, when a perforated plate 26B (for example, shown in FIG. 10C) is sandwiched between the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A, the non-woven fabric 6A, 6B and the perforated plate 26B are previously melt-coated with a hot melt resin. The welded product is loaded into the manufacturing apparatus 50.

  Next, when the perforated plate 26B that is brought into close contact with the nonwoven fabrics 6A and 6B and then brought into contact with the molten filament 5A is a fiber reinforced plastic plate (FRP plate), the constituent fiber of the FRP plate is a three-dimensional network structure 7A. The fibers of the perforated plate 26B are included in the molten filaments 5A constituting the three-dimensional network structure 7A. Since it is not melt | dissolved and it can maintain intensity | strength, intensity | strength is maintained also as a fiber reinforced plastic board. Examples of fibers that are not heat-melted include carbon fibers, polyparaphenylene benzobisoxazole (PBO) fibers, polyamide fibers, aramid fibers, polyimide fibers, polyphenylene sulfide fibers, polyarylate fibers, and the like. The mutual welding power can be increased by using fibers for reinforcing the plate and making the constituent resin of the FRP plate the same resin as the constituent filaments of the three-dimensional network structure 7A or having a lower melting point than that of the network constituent resin.

  There is also a method in which the perforated plate 26B is preheated with an infrared heater or the like immediately before coming into contact with the molten filament 5A to increase the welding force between the perforated plate 26B and the molten filament 5A.

  As shown in FIG. 9, when the nonwoven fabrics 6A and 6B and the reinforcing net 26A are lowered from the open air through-cavity 23C, the two guides are brought to a height immediately before the nonwoven fabrics 6A and 6B and the reinforcing net 26A are in contact with the melted filament 5A. Pass between the plates (not shown) so that the position does not shift. If necessary, the inside may be hollowed and cooled through the liquid refrigerant 1, or the surface may be treated with Teflon or the like to avoid contact adhesion of the molten filaments 5 (Teflon is a registered trademark).

  When the perforated plate 26B is inserted instead of the reinforcing net 26A for giving the tensile strength of the composite 8B, and the perforated plate 26B is made of FRP fiber reinforced plastic, the constituent resin of FRP is made of molten filaments. By selecting the same type of resin as 5A resin, or the melting point of the constituent resin of FRP is equal to or lower than the melting point of the constituent resin of 5A, the perforated plate 26B and the molten filament are selected. 5A can be firmly welded to each other, and the peel strength can be increased.

  In addition, a plurality of outside air penetration cavities 23C through which outside air circulates are provided in the mold base 23A on which the porous mold 24A is mounted, and the nonwoven fabrics 6A and 6B are reinforced from the plurality of outside air penetration cavities 23C. At least one of the net 26A, the perforated plate 26B, and the composite 8A is lowered, and the molten filament 5A that descends while drawing a spiral from the porous mold 24A disposed on both sides with the outside air through-hole 23C sandwiched between them. The multi-layer composite 8I may be formed simultaneously with at least one of the nonwoven fabric 6A, the reinforcing net 26A, and the perforated plate 26B and the three-dimensional network structure 7A.

  Further, when the reinforced mesh 26A and the nonwoven fabrics 6A and 6B are overlapped, the wide surface of the molten filament 5A is lowered, and immediately after the one molten filament 5A is welded to the nonwoven fabric 6A and 6B surface, The melted filaments 5A are welded to the nonwoven fabrics 6A and 6B across the reinforcing network 26A by, for example, welding to the nonwoven fabrics 6A and 6B immediately thereafter, so that the nonwoven fabrics 6A and 6B are widespread on the reinforcing network 26A. The composite 8E reinforced evenly may be manufactured.

  The structure of the mold base 23A to which the porous mold 24A is attached has a plurality of internal molten resin passage regions 23B arranged therein, and further outside the plurality of molten resin passage regions 23B. The shape is provided with a plurality of portions 23C, and while the nonwoven fabric 6A and the reinforcing net 26A are lowered from the open air through-cavity 23C, the molten filament 5A is lowered from the hole of the porous mold 24A, and the descent speed of the nonwoven fabric 6A and the reinforcing net 26A The flow rate of the melted line 5A is increased, and the melted line 5A forms a loop in the vicinity of the liquid surface of the liquid refrigerant 1 and is laminated while being welded to each other, so that the melted line 5A has a three-dimensional network structure. The three-dimensional network structure 7 is formed by mutual welding with the non-woven fabric 6A and the reinforcing net 26A while forming the body 7A, or while the fused filaments 5A sandwiching the reinforcing net 26A at the opening of the reinforcing net 26A are mutually welded. To form. If it carries out like this, the composite_body | complex 8D which has two or more reinforcement | strengthening net | network 26A and nonwoven fabric 6A, 6B in the solid network structure 7A can be formed in one process.

  When one side or both sides of the composite are finally formed into a three-dimensional network structure 7A that is not covered with the nonwoven fabrics 6A and 6B, the nonwoven fabrics 6A and 6B are not provided on one of the inclined plates 3A and 3B, and the shielding plates 12A and 12B. Are continuously used and liquid refrigerant is dropped from the refrigerant dripping pipes 12E on the shielding plates 12A and 12B, or the liquid refrigerant 1 is blown out from the refrigerant outflow holes 12H of the shielding plates 12A and 12B, so that the wide surface molten filament 5A is obtained. It is good to prevent welding to the shielding plate and disturbance of the molten filament 5A, and finish the outer edge of the loop of the wide surface molten filament 5A. When the surface of the composite is a three-dimensional network structure, when used in the soil, the surface mesh is filled with the soil, the filled soil is held in the three-dimensional network structure 7A, and the surface of the composite is the surrounding surface. It becomes the same quality as the surface of the soil, and the frictional resistance becomes stronger than when the soil and the nonwoven fabrics 6A and 6B are in contact.

-Modification of Embodiment 2-
FIG. 10A shows a part of the manufacturing apparatus 50 according to the modified example of Embodiment 2 of the present invention. In this modified example, not the nonwoven fabrics 6A, 6B, etc., but the above-described composite 8A is welded in advance. Different from the first embodiment.

  That is, the nonwoven fabrics 6A and 6B are not supplied from both sides as in the first embodiment, but the composite network 8A of the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B manufactured in advance in the first embodiment is inserted on one side. In this case, the composite 8A is overlapped on the three-dimensional network structure 7A prepared in advance, and the tip of the wire is fixed with a double-sided tape or wire, inserted into the apparatus and sandwiched between the feed drums 16A, and then the composite 8A. Is attached with a holding frame 18A (shown in FIG. 10B) for advancing in parallel with the thickness regulating plates 2A and 2B.

  As shown in FIG. 10A, when the multilayer composite 8G of the present embodiment is manufactured, the nonwoven fabrics 6A and 6B, the reinforcing net 26A, the perforated plate 26B, and the like are placed in a continuous cavity (not shown) near the porous mold 24A. Through the required number of composites 8A of the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B, which have been manufactured in advance by the manufacturing apparatus 50, are fed from the thickness regulating plates 2A and 2B in the liquid storage tank 4. 16A is passed through the outlet auxiliary drum 31, and the non-woven fabric 6A, 6B, the reinforcing net 26A, the perforated plate 26B, etc. on the continuous cavity side and the thickness regulating plates 2A, 2B side are fixed to each other with a wire, tape or the like. . After making such preparation, the liquid refrigerant 1 is put into the liquid storage tank 4, the extruder 20 is operated, and the three-dimensional network structure 7A of the molten filament 5 in each layer is continuously formed as in the first embodiment. To do.

  When the outer surface of the multilayer composite 8H is made into the three-dimensional network structure 7A, as described above, the shielding plates 12A and 12B, the refrigerant dropping pipe 12E, etc. are previously installed on the inclined plates 3A and 3B, or the inclined plate 3A. , 3B, etc., the thickness defining plates 2A, 2B having a wide upper end surface are installed. The thickness of the upper end wide surface thickness regulating plates 2A and 2B is within the range of 3 mm to 200 mm from the thickness of the molten filament 5 and the spiral size, and the diameter of the molten filament 5A extruded from the porous mold 24A. Alternatively, it may be determined according to the state of the loop in the molten state.

-Formation of multilayer composites-
In the above construction method, one nonwoven fabric 6A, 6B is placed on each of the inclined plates 3A, 3B, and the melted filament 5 descending in a spiral manner from the porous mold 24A is welded to the nonwoven fabrics 6A, 6B. The composite 8A of the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B is formed. The manufacturing apparatus 50 once forms a composite 8A, and again feeds the pre-formed composite 8A from the inclined plates 3A, 3B or the nonwoven fabric pulling bar into the apparatus with the nonwoven fabrics 6A, 6B facing up. It is possible to form multilayer composites 8G and 8H in which a nonwoven fabric and a three-dimensional network structure are overlapped on one composite by advancing the inside of the apparatus while being welded to the melted filament 5 eluted from the mold 24A. It becomes.

  When the multilayer composites 8G and 8H are formed, when the composite 8A formed in advance from the inclined plates 3A and 3B is inserted, the bent into the thickness defining plates 2A and 2B from the inclined plates 3A and 3B and the nonwoven fabric pulling rod In the portion, since it is difficult to bend due to the rigidity of the pre-molded composite body 8A and it is bent near the thickness defining plates 2A and 2B, the thickness of the three-dimensional network structure 7A formed in the apparatus may be uneven. is assumed. For this reason, the pressing frame 18A having the shape shown in FIG. 10B is applied to the inclined plate 3A, 3B or the non-woven fabric pulling rod on the pre-formed composite 8A, and the pre-formed composite 8A is inclined to the inclined plates 3A, 3B. When entering the thickness defining plates 2A and 2B from the bottom, the process proceeds downward along the thickness defining plates 2A and 2B. This presser frame 18A is not limited to the production of the multilayer composites 8G and 8H, but also when the reinforcing net 26A and the perforated plate 26B have an increased bending strength even when the three-dimensional network structure 7A is a single layer. It can also be used to follow the plates 2A and 2B.

  The portion of the presser frame 18A where the molten filament 5A extruded from the porous mold 24A hits has a structure in which a number of elongated metal bars and the like are arranged at intervals. This is because the welding strength of the three-dimensional network structure 7A and the nonwoven fabrics 6A and 6B is not reduced so as not to reduce the welding area of the surface layer nonwoven fabrics 6A and 6B such as the pre-formed composite 8A under the presser frame 18A. To help increase.

  When the molten filament 5A descending from the porous mold 24A adheres to the holding frame 18A, the mesh of the completed composite is disturbed. Therefore, the upper surface of the holding frame 18A is made of a fluororesin so that the molten filament 5A does not adhere. Alternatively, the inside is hollow and a coolant blowing hole 18B having a diameter of about 0.5 mm to 2 mm is opened from the surface, and the liquid coolant 1 is blown out from the inside. Alternatively, there is a method in which the refrigerant dropping pipe 12E is newly arranged near the holding frame 18A.

(Main applications of composites)
Next, main applications of the composite manufactured by the manufacturing apparatus 50 according to the above embodiments will be described.

  For example, when taking the composite water from a river, the composite is used as a preliminary filter for filtering and removing soil particles and plankton in water at a stage before filtration with a reverse osmosis membrane or an ultrafiltration membrane. Since the composite 8A is formed by firmly bonding the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A, in order to remove the soil particles accumulated on the surface layer of the nonwoven fabrics 6A and 6B, the surface layer is subjected to water pressure from the purified side downstream of the filtration. When removing the soil particles that are volumetric, the nonwoven fabrics 6A and 6B and the molten filaments 5 are firmly welded at a large number of contact points, and the water pressure applied to the nonwoven fabrics 6A and 6B can be shared by the many contact points. On the other hand, peeling hardly occurs and no concentrated load is applied to the single portions of the nonwoven fabrics 6A and 6B, so that the life as a filtering material is extended.

  Further, since the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A are welded at a large number of welding points, the nonwoven fabric is used even when backwashing is performed by applying pressure from the inside to the outside in order to remove the solid matter attached to the surface. Since 6A and 6B are not separated from the three-dimensional network structure 7A, the non-woven fabrics 6A and 6B of the adjacent composite 8A are adhered to each other even when a large number of composites 8A are arranged in a narrow space and the soil in the water is removed by filtration. In addition, since the water passing space between the composites 8A is also maintained, the surface deposits are reliably removed during backwashing. In addition, a large number of filtration units can be arranged in a narrow space without degrading the filtration performance.

  Also, for example, in order to lower the groundwater level in the soil on the back side of a building where a part of the building is in the soil or a vertical wall surface that touches the soil, it is affixed to the wall surface in advance before backfilling, and the surrounding ground soil or backfill soil The composite 8A can be used as a drainage material that guides the water in the interior to the space of the three-dimensional network structure 7A and drains it outside the site. In this case, the soil in contact with the surface of the composite 8A is held by the nonwoven fabrics 6A and 6B, only water is introduced into the water flow space inside the three-dimensional network structure 7A, and the drainage pipe connected to the tip of the composite 8A. Drain off the premises or drain with a drain pipe installed on the wall in advance. Only the three-dimensional network structure 7A cannot be used as a filtering material or a flat drainage material in the soil because soil particles from the surroundings flow into the water flow space of the three-dimensional network structure 7A. In order to use the three-dimensional network structure 7A for these applications, it is necessary to attach filter materials such as the nonwoven fabrics 6A and 6B to the periphery. However, in the construction methods of the above embodiments, the formation of the three-dimensional network structure 7A and the surroundings The process of attaching the nonwoven fabrics 6A, 6B and the like can be performed in a single process.

  Further, the composite 8A in which the nonwoven fabrics 6A and 6B are welded only on one side is again put into the production line, and the three-dimensional network structure 7A is formed on the nonwoven fabrics 6A and 6B of the primary composite 8A, and the nonwoven fabrics 6A and 6B are formed. When only the three-dimensional network structure 7A is formed on both surfaces of the nonwoven fabrics 6A and 6B in such a manner as to sandwich the three-dimensional network structure 7A on one side of the secondary multilayer composite 8G, the soil mixed with seeds and fertilizer is filled. Later, rooftop greening is possible by spreading on the waterproof floor of the building roof. The three-dimensional network structure 7A below the non-woven fabrics 6A and 6B becomes a water permeable layer that guides water accumulated on the rooftop floor surface to the drainage port on the outer edge of the rooftop. Helps prevent deterioration. The vegetation soil portion above the nonwoven fabrics 6A and 6B has an effect that the three-dimensional network structure 7A prevents the movement and dropping of the soil. The extra length portion 14D of the nonwoven fabric can be used for preventing spillage of the embankment at the edge of the end portion.

  A multilayer composite 8G having non-woven fabrics 6A and 6B on both sides and a reinforced net 26A and a perforated plate 26B inside, and a molten resin on the non-woven fabrics 6A and 6B on both sides of the composite in the secondary and tertiary steps. The multilayer composite 8G in which the three-dimensional network structure 7A is formed can be installed in the embankment and used for the purpose of removing water in the embankment. If the density of the three-dimensional network structure 7A is increased, it is difficult to be deformed even under a compressive load, and the internal water passage space can be maintained. In addition, this multilayer composite 8G has three-dimensional network-like fiber loops welded to the surfaces of the nonwoven fabrics 6A and 6B on both sides of the front and back, and this three-dimensional network-like structure 7A is filled with soil and fixed. It contributes to the improvement of the frictional resistance between the multilayer composite 8G and the surrounding soil. The internal reinforcing net 26A increases the tensile strength of the multilayer composite 8G.

  If a pillar of iron, stainless steel or concrete is passed through the holes of the reinforcing net 26A or the perforated plate 26B inside the multilayer composite 8G and the lower end of the pillar is fixed to a stable rock or ground in the soil, the lateral slip of the multilayer composite 8G Can be prevented. In such a portion where a hole is formed in the multilayer composite 8G, the non-woven fabric 6A, 6B on the surface layer covers the pillar and the opening of the internal three-dimensional network structure 7A to prevent intrusion of earth and sand into the internal three-dimensional network structure 7A. The non-woven fabrics 6A and 6B are separated from the three-dimensional network structure 7A by using shielding plates 12A and 12B as necessary.

  The composite three-dimensional network structure 7A in which the nonwoven fabrics 6A and 6B are welded only on one side is filled with soil containing plant seeds and fertilizer, and the plant can be grown and used as an easy planter. If the material of the molten filament 5A is made of a thermoplastic resin excellent in flexibility, such as polyethylene, polyester, ethylene propylene rubber, thermoplastic elastomer, etc., the three-dimensional network structure 7A filled with soil can be bent freely by hand force. In addition, it can be bent in accordance with the bent surface or the side surface of the cylinder, and when it is fixed, it can be fixed by sandwiching the extra length 14D of the nonwoven fabric with a fixing bracket or applying an adhesive to the surfaces of the nonwoven fabric 6A, 6B. The three-dimensional network structure 7A is welded to the non-woven fabrics 6A and 6B, and the three-dimensional network structure 7A is not easily damaged even if it is filled with soil or the weight of the soil is applied. In the case of the multilayer composite 8G in which the three-dimensional network structure 7A is formed by attaching the reinforcing net 26A, the perforated plate 26B, etc. on the non-woven fabrics 6A, 6B, holes for passing fixing screws or the like through the reinforcing net 26A or the perforated plate 26B, etc. If you leave it open, it will be convenient for fixing walls.

  When the three-dimensional network structure 7A is composed of a flexible resin such as EVA, polyethylene, polyolefin elastomer, ethylene propylene rubber, etc., if the nonwoven fabrics 6A and 6B are welded to one side or the inside of the resin of the three-dimensional network structure 7A, the breakage occurs. It is strong against stretching, and the non-woven fabrics 6A and 6B do not change the flexibility, so that the towel is provided with a flexible three-dimensional network structure 7A. In this case, the three-dimensional network structure 7A portion is not easily damaged even after repeated washing, so that it can be used for mattresses, cushions, pillows, aprons, work clothes, underlaying mats for the human body and animals.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, the entire inclined plates 3A and 3B for lowering the welding between the nonwoven fabrics 6A and 6B and the three-dimensional network structure 7A are submerged under the surface of the water, thereby preventing contact with the molten filaments in the air. A region where 6B and the three-dimensional network structure 7A are not welded may be formed.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Liquid refrigerant
1a Refrigerant liquid level
2A, 2B thickness regulation plate
2C, 2D width regulation plate
3A, 3B inclined plate (guide part)
3C, 3D vertical flat plate
4 Liquid storage tank
5A fused filament
6A, 6B non-woven fabric
6D non-woven roll
6E Nonwoven fabric supply roller
7A Three-dimensional network structure
7C, 7D Wide surface
8A, 8B, 8C, 8D, 8E complex
8G multilayer composite
8H multilayer composite
8I Co-formed multilayer composite
10A, 10B slit
12A, 12B Shield plate
12E Refrigerant dripping pipe
12F, 12G Shield plate
12H Refrigerant outflow hole
13A welded part
14A Welding cancellation part
14B Independent part of network structure
14C Non-woven fabric independent part
14D Non-woven fabric extra length
14E Extended part
15A ~ 15D Roller
16A drum
18A Presser frame
18B Refrigerant outlet
20 Extruder
22B Molten resin
23A Mold stand
23B Molten resin passage area
23C Open air through cavity
24A perforated mold
24B Molten resin extrusion hole
24C blowing face
26A Reinforcement network
26B Perforated plate
28A, 28B Guide plate
31 Exit auxiliary drum
50 Production equipment

Claims (18)

A pair of thickness regulating plates (2A, 2B) are installed in the liquid refrigerant (1) filled in the liquid storage tank (4),
A pair of guide portions (3A, 3B) is installed above the coolant level (1a) on the pair of thickness regulating plates (2A, 2B),
Adjusting the inner width of the lower ends of the pair of guide portions (3A, 3B) to be substantially equal to the inner width of the pair of thickness defining plates (2A, 2B);
In the process in which the nonwoven fabric (6A, 6B) is placed on the pair of guide portions (3A, 3B) and is advanced toward the coolant level (1a) of the liquid coolant (1),
The molten resin (22B) heated and melted is extruded from a plurality of porous molds (24A) having a molten resin extrusion hole (24B) to form a plurality of molten filaments (5A),
In a state where the plurality of molten filaments (5A) are melted, they are spirally dropped onto the refrigerant liquid surface (1a) of the liquid refrigerant (1), and the molten filaments (5A) are thermally welded to each other. The three-dimensional network structure (7A) is formed by stacking in a three-dimensional network while lowering into the liquid refrigerant (1) at the same speed as the nonwoven fabric (6A, 6B).
By cooling with the liquid refrigerant (1) in a state sandwiched between the thickness regulating plates (2A, 2B) while the molten filament (5A) and the nonwoven fabric (6A, 6B) are in contact and welded, Forming a solid three-dimensional network (7A);
A method for producing a three-dimensional network structure, wherein a non-woven fabric (6A, 6B) is welded to the wide surfaces (7C, 7D) of the three-dimensional network structure (7A) to produce a composite (8A). In the manufacturing method of the three-dimensional network structure of Claim 1,
The pair of guide portions are a pair of plate-like inclined plates (3A, 3B) or a pair of rod-shaped nonwoven fabric pulling bars,
The height of the lower end of said pair of guide part is 0.5 mm or more and 200 mm or less from the said refrigerant | coolant liquid level (1a), The manufacturing method of the solid network structure characterized by the above-mentioned. In the manufacturing method of the three-dimensional network structure of Claim 1 or 2,
The nonwoven fabric (6A, 6B) is made of a synthetic resin having an outer diameter of constituent fibers of 10 µm to 200 µm and a thickness of 1 mm to 20 mm. In the manufacturing method of the three-dimensional network structure as described in any one of Claim 1 to 3,
The heat-melted molten resin (22B) is extruded from a porous mold (24A) having a molten resin extrusion hole (24B) having a thickness of 0.1 mm to 20 mm at a speed of 10 mm to 500 mm per second. A method for producing a three-dimensional network structure, characterized in that the molten filaments (5A) have a size of 0.1 mm to 20 mm. In the manufacturing method of the three-dimensional network structure as described in any one of Claim 1 to 4,
Prior to contact with the molten filament (5A), a shielding plate (12A, 12B) for partitioning the molten filament (5A) and the nonwoven fabric (6A, 6B) on the upper surface of the nonwoven fabric (6A, 6B). Intermittently put in and out
Three-dimensional network of melted filaments (5A) stacked between the nonwoven fabrics (6A, 6B) while intermittently preventing welding of the nonwoven fabrics (6A, 6B) and the melted filaments (5A) at the outer edge of the wide surface. By continuously forming the structure (7A),
A three-dimensional structure characterized by producing a composite (8B) having a welding stop part (14A) in which a nonwoven fabric (6A, 6B) and a three-dimensional network structure (7A) are not partially welded at an arbitrary position. A method for producing a network structure. In the manufacturing method of the solid network structure according to claim 5,
While the welding of the nonwoven fabric (6A, 6B) and the molten filament (5A) is prevented using the shielding plate (12A, 12B), the thickness defining plate (2A, 2B) and the guide portion (3A, 3B) and the shielding plate (12A, 12B) are simultaneously lowered downward,
The lower end of the shielding plate (12A, 12B) is in a state below the liquid level of the liquid refrigerant (1) to prevent the welding of the nonwoven fabric (6A, 6B) and the molten filament (5A), and partially the nonwoven fabric (6A , 6B) and a composite network (8B) having a welding stop portion (14A) in which the solid network structure (7) is not welded is manufactured. In the manufacturing method of the three-dimensional network structure as described in any one of Claim 1 to 4,
Before the nonwoven fabric (6A, 6B) contacts the melted filament (5A), the liquid refrigerant (1) is dropped onto the nonwoven fabric (6A, 6B), and the nonwoven fabric (6A, 6B) contains the liquid refrigerant (1). While in contact with the molten filament (5A), the surface of the molten filament (5A) is cooled and is not thermally welded to the non-woven fabric (6A, 6B), while being thermally welded to the other molten filament (5A). By stacking in a three-dimensional network,
The solid network structure (7A) sandwiched between the nonwoven fabrics (6A, 6B) is continuously formed, and the nonwoven fabric (6A, 6B) and the solid network structure (7A) partially solidified are not welded. A method for producing a three-dimensional network structure, comprising producing a composite (8B) having a welding stop portion (14A). In the manufacturing method of the three-dimensional network structure according to claim 7,
Of the feed rollers (15A to 15D) and the feed drum (16A) for lowering the three-dimensional network structure (7) and the nonwoven fabric (6A, 6B) in the liquid refrigerant (1) at the time of forming the welding stop portion (14A). By rotating the progress speed faster than normal,
The three-dimensional network structure (7A) and the non-woven fabric (6A, 6B) are separated, and the adjacent molten filaments (5A) are independent without mutual welding, and are extended portions with a low network density that are easy to cut and remove ( 14E) is manufactured, The manufacturing method of the solid network structure characterized by manufacturing the composite (8C). In the manufacturing method of the solid network structure according to claim 8,
A three-dimensional net-like structure characterized in that when the welding stop portion (14A) is formed, the traveling speed of the feed rollers (15A to 15D) and the feed drum (16A) is increased in the range of 5 times to 50 times the normal speed. Manufacturing method of structure. In the manufacturing method of the three-dimensional network structure as described in any one of Claim 1 to 9,
Instead of non-woven fabric, a reinforcing net (26A) made of synthetic resin, metal or carbon fiber or a perforated plate (26B) made of fiber reinforced resin or metal is welded to the molten filament (5A) to strengthen the reinforcing net ( 26A) or a perforated plate (26B) and a synthetic resin three-dimensional network structure (7A) (8D). In the manufacturing method of the solid network structure according to any one of claims 1 to 10,
Reinforced net (26A) made of synthetic resin, synthetic fiber, metal fiber or carbon fiber or made of fiber reinforced resin or metal on the upper surface of the nonwoven fabric (6A, 6B) to which the molten filament (5A) contacts. The three-dimensional network structure (7A) is constructed while the non-woven fabric (6A, 6B) and the reinforcing net (26A) or the perforated plate (26B) are advanced at the same speed while overlapping the perforated plates (26B). Lowering the molten filament (5A),
A three-dimensional network having the reinforcing network (26A) or the perforated plate (26B) between the nonwoven fabric (6A, 6B) and the solid three-dimensional network (7A). Manufacturing method of structure. In the manufacturing method of the solid network structure according to any one of claims 1 to 11,
At least one of the composites (8A, 8B, 8C, 8D, 8E) is again inserted from above the guide part (3A, 3B),
Production of a three-dimensional network structure comprising a multilayer composite forming step of forming a multilayer composite (8G) by proceeding with the molten filament (5A) lowered from the porous mold (24A) Method. In the manufacturing method of the three-dimensional network structure of Claim 12,
Repeat the multilayer composite formation step,
A three-dimensional network structure characterized by forming a multilayer composite (8G) of the three-dimensional network structure (7A) and at least one of the nonwoven fabric (6A, 6B), the reinforcing network (26A) and the perforated plate (26B). Body manufacturing method. In the manufacturing method of the solid network structure according to any one of claims 1 to 12,
When forming the composite of the three-dimensional network structure (7A) by lowering the molten filament (5A) from the porous mold (24A), one of the pair of wide surfaces having a larger area than the other side surfaces is provided. The nonwoven fabric (6A, 6B), the reinforcing net (26A) or the perforated plate (26B) is not inserted, the guide portion (3A, 3B) is not installed above the coolant level (1a), and the outer surface is nonwoven fabric. A method for producing a three-dimensional network structure, comprising forming a multilayer composite (8H) that is a three-dimensional network structure (7A) that is not covered with (6A, 6B). The mold base (23A) on which the porous mold (24A) is mounted is provided with an outside air penetration cavity (23C) that is continuous in the vertical direction and through which the outside air flows.
Lowering at least one of the nonwoven fabric (6A, 6B), the reinforcing net (26A), the perforated plate (26B) and the composite (8A) from the outside air penetration cavity (23C),
The nonwoven fabric is made to advance by bringing it into contact with the molten filament (5A) that descends while drawing a spiral from the porous mold (24A) disposed on both sides of the outside air penetration cavity (23C), while drawing a spiral. (6A), production of a three-dimensional network structure characterized by forming a multi-layer composite (8I) of a three-dimensional network structure (7A) and at least one of a reinforcing network (26A) and a perforated plate (26B) Method. In the manufacturing method of the three-dimensional network structure as described in any one of Claim 1 to 15,
The said nonwoven fabric (6A, 6B) is the spun bond nonwoven fabric which does not melt | fuse between constituent fibers, The manufacturing method of the three-dimensional network structure characterized by the above-mentioned. A three-dimensional network structure in which a thermoplastic resin containing any one of polypropylene, polyethylene, ethylene propylene rubber, polyolefin elastomer, and ethylene-vinyl acetate copolymer is stacked in a three-dimensional network form by heat-sealing spiral fused filaments. 7A) on at least one surface of a reinforcing resin (26A) made of synthetic resin, synthetic fiber, metal fiber or carbon fiber, perforated plate (26B) or non-woven fabric (6A, 6B) made of fiber reinforced resin or metal A three-dimensional network structure characterized in that it is a composite (8D) in which is welded. A thermoplastic resin containing any of polypropylene, polyethylene, ethylene propylene rubber, polyolefin elastomer, and ethylene vinyl acetate copolymer is stacked in a three-dimensional network, in which spiral fused filaments are heat-bonded to each other and stacked in a three-dimensional network. A reinforcing net (26A) made of synthetic resin, synthetic fiber, metal fiber or carbon fiber or a perforated plate made of fiber reinforced resin or metal (26B) on at least one surface of the three-dimensional network structure (7A) A three-dimensional network structure comprising a multilayer composite (8G) in which nonwoven fabrics (6A, 6B) are laminated.

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