JP3483286B2 - Plate shaped body - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-like molded product such as a sleeper suitable for laying on a ballast ballast of a railway and a method for producing the same. 2. Description of the Related Art Conventionally, in a railway, lateral pressure is applied to a rail at a branch portion or a curved portion when passing through a train, so that the track tends to be laterally displaced. It was easy. For this reason, PC concrete sleepers often used for sleepers have been devised such that a rubber plate is attached to the laying surface on the bottom surface to increase frictional resistance with a ballast track. In addition, in synthetic sleepers (see Japanese Utility Model Publication No. Sho 61-23042, etc.) which have recently been used as railway sleepers, the P
As in the case of the C concrete sleeper, a device such as attaching a rubber plate has been devised. [0003] In the case of the above-mentioned synthetic sleeper, however, the synthetic sleeper itself has a certain degree of elasticity, so that the ballast bites into the sleeper without sticking a rubber plate or the like, and the lateral slippage occurs. Is prevented to some extent. However, in the high-density region of the present synthetic sleepers, it was insufficient to prevent the lateral displacement. For this reason, it is conceivable that low-density members made of the same material as the synthetic sleeper are overlapped and bonded. If the entire surface in contact with the roadbed is formed of a low-density layer, the low-density layer may be crushed, and the rail may not be maintained at an appropriate height. [0005] The present invention has been developed in view of the above problems, as sleepers capable of preventing lateral displacement of the track ballast is while maintaining necessary rigidity, or other well plate molding can be used as civil engineering and building components, etc. The purpose is to provide the body . [0006] The plate-like molded article of the present invention according to claim 1 is made of a thermosetting resin foam in which long fibers are embedded in the longitudinal direction, and has a density of 0.6. ~ 1.0g / c
m3 and a sheet having voids filled with thermosetting resin foam in the voids and having a density of 0.
2 to 0.6 g / cm3, lower density than the first layer, and a thickness of 3
A is a second layer and the plate-like molded body formed by to 10 mm, and is characterized in that the second layer is formed in a recess formed on one surface of the first layer. [ 0007 ] The plate-like molded article of the present invention according to claim 1
As the long fibers, either inorganic or organic long fibers may be used, but glass long fibers are most desirable from the viewpoint of strength and economy. [0008] Examples of the thermosetting resin foam, but in the thermosetting not be particularly limited as long as it is a resin foam rigid, especially rigid urethane resin and hard polyester resin foaming is granted Can be suitably used. [ 0009 ] In the plate-like molded product according to the first aspect of the present invention, the second layer may be a layer made of a sheet-like material in which a void is filled with a thermosetting resin foam, for example, a thermosetting resin may be placed in the void. Examples include a porous sheet layer such as a polyester nonwoven fabric sheet filled with a resin foam, and a hexagonal paper honeycomb material layer. [ 0010 ] The thickness of the second layer is about 3 to 10 mm .
You. When the thickness of the second layer is 10 mm or more, the ballast bites into the sleeper only in the second layer, and the second layer is broken by lateral pressure, and the effect of the frictional force may be lost. When the thickness is 3 mm or less, the ballast is less likely to bite into the sleepers, and the effect of the frictional force is reduced. [0011] [act invention plate-shaped molded body according to claim 1, wherein, which is configured as described above, for example, when using the plate shaped body as the sleepers are track bed is a ballast track bed Even so, the ballast penetrates well into the low-density second layer, so that the frictional force between the sleeper and the track bed is increased, and the rail is prevented from lateral displacement. Further, since the first layer is made of high-density rigid long fiber reinforced thermosetting resin foam, the necessary flexural strength as sleepers, compressive strength, etc. is ensured. [ 0013 ] Further, since the second layer is formed in the concave portion of the first layer, the width of the second layer is formed smaller than the width of the first layer. For this reason, the portion in contact with the roadbed does not entirely become the second layer, and the appropriate height of the track is maintained without collapse of the second layer. [0014] The manufacturing method of the embodiment of the present invention plate-shaped molded body and the plate-shaped molded body will be described with reference to FIG. FIG. 1 is a perspective view showing an example of the plate-shaped molded product of the present invention. In FIG. 1, 1 is a plate-shaped molded body, 2 is a first layer constituting the plate-shaped molded body 1, and 3 is a second layer. The first layer 2 is made of a thermosetting resin foam in which the reinforcing long fibers 4 are embedded in the longitudinal direction, is formed in a plate shape having a substantially square cross section, and has a density of 0.6 to 1.0 g / g. cm
3, and a concave portion 5 is formed on one surface. The second layer 3 is formed of a porous sheet in which a thermosetting resin foam is filled in voids of a porous sheet made of a polyester nonwoven fabric,
Its density is 0.2 to 0.6 g / cm3 (preferably 0.1 to 0.6 g / cm3).
3 to 0.5 g / cm 3) and is formed in the concave portion 5 formed in the first layer 2. A is the width of the first layer 2, B is the width of the second layer 3, T is the thickness of the second layer 3, B = 190 m
m, A = 230 mm and T = 5 mm. [0015] When using this plate-shaped molded body 1 as the sleepers, the second layer 3 of low density are laid on the laying surface of the ballast bed. Then, the ballast of the track bed penetrates into the second layer 3, the frictional resistance between the track bed and the sleeper increases, and the lateral displacement of the track is suppressed. [0016] FIG. 2 is a perspective view showing another example of the present invention plate-shaped molded body. In FIG. 2, reference numeral 11 denotes a plate-like molded product;
Denotes a first layer, and 13 denotes a second layer. The second layer 13 is made of a paper honeycomb material in which a void is filled with a thermosetting resin foam, and has a density of 0.2 to 0.6 g / cm3 (preferably 0.3 to 0.5 g / cm3). It is. Other configurations are the same as those of the plate-like molded body 1 shown in FIG. [0017] FIG. 3 is an explanatory diagram showing an example of a manufacturing process of the present invention plate-shaped molded body. Next, an example of the method for producing the plate-shaped molded article of the present invention will be described with reference to FIG. The fiber bundle 32 in which a number of long glass fibers 31 are bundled and arranged continuously advances on the impregnating table 30 which is disposed vertically at predetermined intervals, and the fiber bundle 32 is formed on the impregnating table 30 during the progress. A urethane resin liquid (foam-curable resin liquid) 34 is caused to flow down and adhere from the urethane resin mixing and discharging machine 33. In this case, the first layer 2 has a density of 0.6 to 1.0 g / cm3,
The supply amount of the urethane resin liquid 34 considering the glass long fiber 31 and the expansion ratio is set according to the molding size. [0018] Then, the fiber bundle 32 to the urethane resin solution 34 is deposited, nipped by the impregnation plate 35 which is disposed above the impregnation stage 30 and the impregnation stage 30. Next, the impregnating plate 35 is moved in the width direction of the fiber bundle 32 to impregnate the fiber bundle 32 with the urethane resin liquid 34. Furthermore, the fiber bundle 32 which urethane resin solution 34 is impregnated converges while maintaining a layer, below the fiber bundle 32, a roll 36 which is arranged below the impregnation stage 30
Supplies a porous sheet 37 made of a polyester non-woven fabric, and guides the fiber bundle 32 and the porous sheet 37 to a forming passage 39 surrounded by four endless steel belts 38, while moving in the forming passage 39. The plate-shaped molded body 1 is manufactured by foaming and curing. [0020] Next, the range of the first layer 2 in a weight ratio of the plate-shaped molded body 1, the composition ratio, an example of the urethane resin compounding ratio shown in Table 1. [0021] [Table 1] [0022] FIG. 4 is an explanatory diagram showing another example of the manufacturing process of the present invention plate-shaped molded body. Next, another example of the method for producing the plate-shaped molded product of the present invention will be described with reference to FIG. 4, the impregnation table 30, the urethane resin mixing / discharging machine 33, the impregnation plate 35, and the steel belt 38 use the same equipment as the example shown in FIG. As in the example shown in FIG. 3, a fiber bundle 3 in which many glass long fibers 31 are bundled and arranged.
2 is impregnated with a urethane resin liquid 34, and a paper honeycomb material 41 is supplied from a storage container 40 disposed below the impregnation table 30 below the converged fiber bundle 32 while being held in a layered state. Forming channel 42 surrounding honeycomb material 41 by four endless steel belts
Then, while moving in the molding passage 42, the foamed and cured foam is formed to form the plate-shaped molded body 11 described above. The range of the weight ratio of the first layer 12 of the plate-like body 11, the composition ratio, a urethane resin formulation ratios are the same as those shown in Table 1. [0024] [Effect of the Invention] As has been described above, in the case where the present invention plate-shaped molded body was used as a sleeper, necessary rigidity, bending strength, the first layer of high density having a compressive strength, etc. and the Since the lower layer is integrally formed with the second layer having a lower density, it is possible to easily bite in the ballast while maintaining rigidity and strength required for the sleeper. Thereby, the ballast resistance of the ballast track can be increased, so that even in a ballast track or the like, lateral displacement of the track can be reliably prevented. Further, since the portion in contact with the track bed does not become entirely the second layer can be the second layer collapses without maintaining the proper height of the rail. Further, the plate-like molded body, without limiting the intended use in the sleepers may be used in other applications including the building component. Further, as described above, since the first layer and the second layer are formed integrally, it is possible to eliminate peeling of the bonding surface, poor adhesion, and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of a plate-shaped molded product of the present invention. FIG. 2 is a perspective view showing another example of the plate-shaped molded product of the present invention. FIG. 3 is an explanatory view showing an example of the production process of the plate-shaped molded product of the present invention. FIG. 4 is an explanatory view showing another example of the production process of the plate-shaped molded product of the present invention. DESCRIPTION OF SYMBOLS 1, 11 Plate-shaped molded body 2, 12 First layer 3, 13 Second layer 4, 14 Long fiber 5, 15 Concave part 30 Impregnation table 31 Glass long fiber 32 Fiber bundle 33 Urethane resin mixed discharge liquid 34 Urethane resin liquid 35 Impregnated plate 36 Roll 37 Porous sheet

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B32B 5 / 14,5 / 18,5 / 22-5/32 E01B 3/44 B29C 44/00-44 / 60,67 / 20

Claims (1)

(57) [Claims 1] A thermosetting resin foam in which long fibers are embedded in the longitudinal direction, and have a density of 0.6 to 1.0 g /
cm3 and a density of 0.2 to 0.6 g / cm3
A lower density than the first layer, a plate-like molded body formed by a second layer having a thickness of 3 to 10 mm, wherein the second layer is formed in a recess formed on one surface of the first layer A plate-like molded product, characterized in that: