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Forming-molding tool and process for producing preforms and fiber reinforced plastics with the tool

A fiber-reinforced plastic and preform technology, applied in the field of preform and fiber-reinforced plastic manufacturing, can solve the problems of equipment cost, defective molded products, labor and time, etc., and achieve the effect of low cost

Inactive Publication Date: 2009-08-05
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepreg used here has the advantage of being able to control the reinforcing fiber volume ratio Vf to a high degree, and can obtain FRP with excellent mechanical properties, but there are problems as follows: the prepreg itself is an expensive material, and the autoclave equipment is very expensive, etc., resulting in High molding cost
[0010] However, if the above scheme is adopted, an oven must be used in order to heat the laminated sheet with heated air
An oven is cheaper than an autoclave, but when using an oven to mold aircraft structural components, a large oven that can accommodate the component is required, and during the heating process, the forming mold needs to be transferred to the oven, resulting in increased molding costs
Furthermore, depending on the shape of the molded product, there are places where the hot air from the oven can easily reach and places where it is difficult to reach, resulting in uneven heating
On the other hand, although a method of heating with a silicone rubber heater, etc. is also described, there is no description of the installation method of the silicone rubber heater, etc., and when heating a large-scale member such as an aircraft structural member, there are the following problems: Silicone rubber needs to be arranged in a very large area, and uneven heating occurs between the part where the silicone rubber contacts the mold and the part that does not contact the mold, resulting in defective molded products, etc.
[0017] Therefore, in addition to preparing the forming mold, it is necessary to prepare a forming mold separately, and at the same time, it is necessary to transfer the forming mold equipped with the preform to a heating device such as an oven, and there is a problem that the molding time is too long
[0018] In particular, structural members for aircraft have the following problems: due to the large size of the structural member, the weight of the molding die is very heavy, and it takes labor and time to transfer it to heating equipment such as an oven, or requires a lot of equipment such as a tractor. Equipment costs, etc.

Method used

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  • Forming-molding tool and process for producing preforms and fiber reinforced plastics with the tool
  • Forming-molding tool and process for producing preforms and fiber reinforced plastics with the tool
  • Forming-molding tool and process for producing preforms and fiber reinforced plastics with the tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0183] constitute figure 1 , figure 2 The forming mold 1 shown was subjected to heating and cooling tests.

[0184] (Forming mold)

[0185] figure 1 Represents a cross-sectional view of the shaping molding die 1, figure 2 Indicates a top view. but, figure 2 It is a figure which shows only the piping 4 and the piping 5 arrange|positioned in the panel part 2 and the flat board part 3 except the panel part 2 and the flat board part 3 which form the hollow convex part.

[0186] The panel part 2 forming the hollow convex part was obtained by making SUS304 with a thickness of 3 mm into a C-shape. The convex portion has a tapered shape with a width at one end ( figure 2 The right end of the middle) is 300mm, and the other end ( figure 2 left end) is 150mm. In addition, the length of the above-mentioned protrusion ( figure 2 The left and right direction) is 5000mm, the height ( figure 1 The vertical direction) is 100mm, and the length and height of the convex part are...

Embodiment 2

[0199] (reinforced fiber substrate)

[0200] Use a unidirectional carbon fiber fabric made of carbon fiber (T800S manufactured by Toray Co., Ltd.) (carbon fiber unit area weight 190g / cm 2 ) as the reinforcing fiber substrate. Attach 27g / cm on one side of the reinforcing fiber substrate 2 Particulate resin material mainly composed of thermoplastic resin (glass transition temperature Tg=70°C).

[0201] (Laminate)

[0202] The aforementioned reinforcing fiber substrates were cut and laminated to prepare a laminate. The lamination of the laminate is made of carbon fiber to [(45 / 0 / -45 / 90) 4 ] s The 32 layers oriented in the same direction have a trapezoidal shape with a height of 4900 mm, a lower base of 440 mm, and an upper base of 290 mm. It should be noted that the values ​​in the brackets ( ) represent the orientation angles (°) of the carbon fibers in each layer, and the 4 after the brackets ( ) means that the lamination was repeated four times (45 / 0 / -45 / 90). The S afte...

Embodiment 3

[0210] In the state where the preform 19 obtained in Example 2 is placed on the forming mold, as Figure 5 As shown in (C), the medium 20 serving as an auxiliary material for injecting and impregnating the matrix resin is disposed on the preform 19 . In addition, prepare 2 pieces of medium 20, respectively as Figure 5 As shown in (C), the injection port 8 is arranged as a medium for injection of the matrix resin, and the suction port 9 is connected as a medium for suction. The injection port 8 and the suction port 9 are provided with a plate 21 sandwiching a medium 20 . in addition, Figure 5 Not described in (C), a release layer is arranged between the preform 19 and the medium 20 . The release layer is an auxiliary material arranged so that the medium 20 is not bonded and integrated with the molded product after the matrix resin is cured.

[0211] In addition, a nylon tube having an outer diameter of 12 mm was attached to the connector 26 for the injection port and the ...

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Abstract

To heat a laminate of a reinforcing fiber base material uniformly with high precision, a forming-molding tool for resin transfer molding of fiber reinforced plastics obtained by integrating a face plate part and a flat plate part for forming a hollow convex part, in which metallic piping as a flow path of a heating medium is integrated with the back surface of the face plate part by a thermally conductive material and a rubber cord is integrated with an outside of a region used for forming or molding in the flat plate part is used.

Description

technical field [0001] The present invention relates to a forming mold used for manufacturing fiber-reinforced plastics by resin transfer molding (hereinafter sometimes referred to as RTM molding), a preform using the same, and a method for manufacturing fiber-reinforced plastics. More specifically, it relates to heating a forming molding die by flowing a heat medium through a pipe integrally provided in the forming molding die, whereby a reinforcing fiber base material and a matrix resin which are fiber-reinforced plastic materials can be heated without using an oven. , A forming mold for resin transfer molding for producing preforms and fiber-reinforced plastics, and a method for producing preforms and fiber-reinforced plastics using the same. Background technique [0002] Structural members constituting transportation equipment such as aircraft are required to satisfy mechanical characteristics, and also require weight reduction and cost reduction. Among them, the expect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/10B29C43/28B29C43/56B29K105/08
CPCB29C70/547B29C43/10B29C2043/3655B29C2043/3647B29C33/04B29K2105/258B29C70/443B29C33/405B29C2043/3644B29B11/16B29C70/549
Inventor 筱田知行浅原信雄山本晃之助
Owner TORAY IND INC