JPH03272820A - Manufacture of fiber-reinforced plastic - Google Patents

Abstract

PURPOSE:To manufacture easily the fiber-reinforced plastic product excellent in specific strength and high in fiber content by a method in which a part of the mold face which defines a cavity is composed of a flexible sheet, and pressure is applied to the flexible sheet from outside, whereby the pressure in the cavity is controlled. CONSTITUTION:Reinforcing fiber F is arranged in the cavity 4 of a mold 1, and the upper surface of the mold 1 is covered with a sheet 2, thereby sealing up the cavity 4. A pressure-holding vessel 3 is fixed onto the upper surface of the mold 1 through the sheet 2, and compressed air is introduced in a space 6 from a pressure-introducing port 3a. Then the inside of the cavity 4 is evacuat ed. Unreacted raw material-liquid L is injected into the cavity 4 in vacuum state from a resin-injecting port 1b. While the pressurizing due to compressed air is continued, the raw material-liquid L is injected. When the supply of the raw material-liquid L of prescribed amount is finished, and before the reaction- curing of the raw material-liquid L in the cavity 4 is completed, the compressing pressure fed to the pressure-holding vessel 3 is increased. After the curing of the resin has been finished, the pressure-holding vessel 3 and the sheet 2 are removed, and a product is obtained.

Description

[Detailed description of the invention] The present invention has the advantages of industrial 1゛ and F11.
17, especially when the cellulose ratio is <11 and the strength is excellent (
-1, Various plate materials, solid tank Jz products, etc., are used in white and fibre-reinforced plastics, so-called)' RP manufacturing.

Conventional Techniques Conventionally, this type of fiber-reinforced plastic resin has been manufactured using a manufacturing method (-7, shown in FIG. 8, t', h;)1. - Place the reinforcing fibers in the mold 1) 1. Unreacted raw material liquid■
2 was injected and the reinforcing fiber (I was impregnated with the raw material solution J and solidified by causing a reaction) was produced using the 4-b method.

That is, 71. The mold hole and the lower mold [(cavity 0 defined by the mold 1fii) thickness T are constant, and the thickness T
The amount of fiber F that enters the cavity is determined depending on If the product contains a large amount of fiber, it is not easy to produce fiber-reinforced brass with specific strength.

In addition, when making a product with a multi-weight shape by the rim method using a normal mold, there are parts that do not bunch even when sufficient pressure is applied to the fibers (for example, the dimensions shown in Figure 9). Upper mold A゛
and lower mold ■゛ If you are requesting a product with an LJ-shaped cross section,
- Apply pressure to the mold A' in the direction of the arrow.

In the case, cavity Ding F! Pressure is applied to JSC1, but on the side (1, part (,: means IF-force is not enough) in the direction different from the direction of the arrow, the fibers of side C7 The shape of the mold surface of i? becomes poor, the fiber content reaches its limit, and the thickness accuracy also deteriorates.

Furthermore, the throat is made up of a normal upper mold and a lower mold.
Figure 10 shows that it is not possible to make a product with the shape of an undercut. Therefore, the undercut I
・When making shaped products, each mold is divided into multiple parts (,
゛This requires a structure in which these are connected to each other while attaching and detaching C1, making the mold structure extremely complicated.1. -There is a problem 1
As I wrote down in [), in the conventional manufacturing method, there are the problems listed in F-) 1.) It is difficult to control the fiber w content 6.

■Complicated to add side parts etc.! , i sho;
In this case, it is not possible to apply uniform ζ: pressure 11'.

■Easily create products with the undercut shape.

Therefore, it is an object of the present invention to propose a manufacturing capacity method that solves all of the above-mentioned problems (1), (2), and (3).

In addition to achieving the above objects, the present invention uses a flexible sheet for at least a part of the mold surface of a mold that forms the product surface. After placing the reinforcing WK fibers in advance in the mold of the mold, fix the flexible sheet to the mold and form a caviar eye surrounded by the sheet and the mold.
Then, pressurize the reinforcing fibers placed inside the cavity through the sheet from the outside, and in the pressurized state L11, unreacted raw material liquid is removed from the cavity. Injection 1. Provides a method for producing Fiber Reinforced Plus-F Tsuno 7, which is characterized by causing the reaction to occur while avoiding impregnation of the reinforcing fiber with the raw material solution. , 4. - Published [7. A pressure medium is used.什：； ””’i’before(”1”
IJII-'A-21st pressure, I'J's first step, OJl, next IHE horn, primary IlE force and raw material liquid't
Set the pressure to be greater than 1 person (J, LL, L), and place it in the upper Aii: F Yahiwo~i.
Kuichi Mise, N of the raw material liquid, 1 submersion pressure added at the time of injection, Pl, = 'i-The raw material liquid injected into Yahidi will have a load of -4 before solidification'; note 2 If the next pressure is F + t, and the pressure at which the unreacted raw material liquid enters the mold is Ω, then P1≦Ω and 12 people P ls P t and Q < p t (7) Relationship (5 settings ゛ 4) is preferably 1.5.

6) Using the unreacted raw material liquid described in 7 and the molten omega-lactone containing the polymerization catalyst and initiator, this is heated to form a mono-7-caste with polyamide resin. It is preferable to prepare the structural material using the engine method. )・1-Connection-4 It is preferable that the filter part be made of non-woven cloth such as bunose, carphone, sujiru, or ej machine fiber.

In the manufacturing method according to the present invention, part of the mold surface defining the cavity is made into a flexible sheet ↓ “Reconfiguration (,2
By applying a force from the outside to the flexible sheet, the pressure inside the cavity is controlled. , the reinforcing fiber content can be controlled arbitrarily.

51. In order to apply fJ+1 pressure inside the cavity with an isodirectional assembly medium such as gas or liquid through a flexible sheet,
3. It is possible to apply a uniform i = g force to the force → ゛ A. Form 1 戊t,, ' -r る pu 1. The resin is [lil (
After the sheet is shrunk and easily released from the mold (゛, ), yo-), the 1' undercarriage-shaped product is easily molded into CY1. Can you manufacture the mold structure a-=-? 1 Real crushing j, s!・Refer to the drawings for the present invention1. Details (Explanation 4-3) Manufacturing method related to the present invention - For iron
The following is an explanation of the device shown in Figure 1-4.
), the water device consists of a mold 1, a flexible thin-walled sort 2, and a pressure holding container 3. The mold l is the main part of the pair of molds.
This embodiment consists of a fixed F mold, one side is open DL, a gate is installed with a rectangular cross section, and 1a is n'', and
The cavity 4 surrounded by the mold surface 1a has a resin injection hole 1.1 which communicates with the mold surface 1a, and a plug is detachably attached to the resin injection hole lb. After placing reinforcing fibers I:'' in the cavity 4 of the mold 1, fixing the reinforcing fibers I:'' in the cavity 4 of the mold 1; .C.1.2 (yo ljJ
Flexibility, white color, oh, 1, good, → 7, sesiri! Rubber; 1: 9 pieces Sufpal 1st; The power holding container 3 is +. 3rd self no l・21:
On the other hand, there is a pressure difference of 1 river 4, and as shown in the figure, mold 1 -1-715-1>-1-2. [, 11'-1 force 1, f-state-installation 1, te, 5... j.
, upper wall 1, 1 perforation 15, H blade grooving 1-1j aj
F) conducts the medium, the pressure disturbance =
b-. = is i/-1-2 (5: pressure is equal to i/-1-2 (5: pressure is
j−L[ '−! The person who does it is used.

1:r. gi'. U L no. :． ．． J′・),
It is sufficient to use only one side of the product to be molded using the gold molding method of the present invention. , ], the mold is good only on the L'1 side, but like a normal mold 0), both sides are good, in this case, the mold on the - side is h +ii'!.
In order to hold the pressure horn protective container, the fixing knob method of saw 12 to the mold I (limited to i-iv.
, For example, separate fixing plate with screw holes (4 general,
The fixing plate is attached through /-1 (, J, with screws on the mold.

33 manoni, soj.
2. Part fixed to mold l, 4"rigi? +:l"i
In the button area on the A side, nail the mold iNi I a of the mold 1, and set the tree scolding reservoir 9 on the mj of the mold 1 (2).
It's okay to have 1 jS.

Next, the method for manufacturing the fiber-reinforced plastic nanoknit according to the present invention will be explained with reference to FIG.
As shown in Figure (1), the reinforcing fibers F (2, mold 1,) are arranged in the mold 4. Even if the reinforcing fibers F (4) are in the form of a sheet, they are lumpy. ) Kokomoyoshi< ,,
ff. ;Autumn is optional. If you want to improve the fiber content f), stack a large number of fibers)>-1-4, etc.(7) Method
7L. , j-), for example: i'', mold 1. 9) When the thickness of the cavity 4 is set to '1'', the reinforcing fiber evaporator is arranged to be thicker than the thickness I''. , ↓, ri fibers are in a protruding state and lf-, ).

Then, as shown in Figure 2 (II), carve the saw) 2 into the soil 6 of the metal press mouth, and push the protruding reinforcing edge IR into the capacity 4.・U14-C, cover from the bottom, and attach the capacity 4 to the mold 1 and cover 2 with J and t.
) Closed 1-ru. At this time, the pressure holding vessel 3
2 G fixed] At 11j, sort 2 desired. i11
! 2. Fix the periphery of the part marked by a and b in Figure 41, using the dotted chain line 4;) using the J screw 8 to fix the metal ring 1++JrA:1, good L). , just ζ, 2nd ward] (+11)iJ elementary school -4yo.-), money η11ζ,')↓if+ii=,7..river.? Fix the pressure holding vessel ;) through 1B.

Place the pressure holding container (3). ! ．． j) >-)=
2 r:) Cut the periphery into mold 1 i. m fixed - 4 ru 5, Figure 2 (Mr.) i. ″Small Δ.J: −′1 i.
l:, I-f force holding container 3 6>pressure introduction 1""'I
:3 ;i from 'Sl? r16 i1 1EE 'A”
6 'Introduce spiritual energy. 5'）When, Kya L:'
r. (4 is a vacuum source (O 4 shown)), ii iij
L-Goki)-e ”j I 1 0) Internal) 1st
5 Throat 08・bow.

The compressed air in the pressure acting space 6 is applied to the seat 2 f′1,
Saws 1 and 2 have flexibility (-Z%),
Mold i of sheet 2: 2a shrinks the reinforcing fibers in the mold 4 by L++ and then bends along the mold surface 1a of the mold l as shown in the figure. along mold surface 1a)
The periphery of the molded sheet mold surface 2a is in close contact with the mold surface 1a.
) Both (...) The parts that come in contact with the reinforcing fibers F are in close contact with the reinforcing fibers F j-7, but the entire area is uniform 111E.
, t), pressurize the reinforcing fibers by 4 degrees (9, □), 4
Evenly fill the inside of the fiber with 'C reinforcing fiber 1.'
)・Thickness 1 between mold surface 2a is uniform.

1-', control the reinforcing fiber ■P force 11 pressure -6 to F force j:, control the filling degree of the reinforcing fiber F τ, and make the fiber content K<-# If you do so, reduce the pressure by 4 degrees (L). , the fiber gold ratio of 5" is changed to increase the amount of fibers contained without changing the thickness of the product) and change the appearance of the fiber stripes of 4". Saυ−
There is a horn method that reduces the thickness of the product without using L.
)6-゛゛゛〇　の方 u #p しh 2 wosukeL ”r
Reinforcement* Fiber Fill', controls the pressure applied.

1. Next, connect 1 lb of resin to the resin raw material liquid tank (6' shown in the figure) as shown in Figure 2 (V). 11. hand,
An unreacted raw material liquid is poured into the vacuum cavity 4 through the resin injection port 1b.The raw material liquid is injected while continuing to pressurize the reinforcing fibers with the compressed air. The injection pressure of unreacted raw material liquid I is set to be higher than the above pressure.
- If the secondary pressure is added -4, reduce the primary pressure when the raw material liquid t↑ is large (2) or release it1. (JL)

17. The reaction is carried out while impregnating the unreacted raw liquid into the reinforcing fibers L-r placed in advance in the cavity 4. t゛: Ru.

Then, as shown in FIG. 2 (Vl) L: 1, a predetermined number of raw material liquids 1. (G) When the supply is completed and the 62nd point is reached, gear 1:
Before the reaction and solidification of the raw material liquid in Day 4 is completed, supply to the pressure holding vessel 3 j4 contraction 1-1: Increase the force. Before this solidification, the secondary W force that acts 4' + 1 Jl is placed in advance 7
4. Reinforcing fibers are added to the 1st lamp [comparison with the force j, - is set to be large, and the pressure is set to be larger than the raw material liquid injection pressure;
,.

ing. That is, if the above primary pressure is P, the secondary pressure is P2, and the injection pressure of the unreacted raw material liquid into the gold ηf is Ω, then I□ S Q
And, 1.2xP+sP, or one,
To:! <P.

[,”) It is preferable to set it to the relationship: top (, ”).

jl-1 loquat quadratic addition 4. By, Kij Hif'-, (4,
17) Inside,) Reinforcing fiber 1 ゛ is resin L 1 person Y) The resin solidifies, 〉, +:. Resin 0) After solidification or completion 1. .

Remove the pressure 1-2, -) that has been applied to 1, remove the pressure holding container 3 with 7)-4-, and remove it from the mold I. Mold and take out the product.

1. Manufactured by the method described in ``2 Machine R = Fiber Reinforced Zoraf, →° I'' products have a high cellulose content, high concentration of fibers,
・Excellent in J, ;L).

The resin used in the first production method is either an unreacted raw material liquid or a molten J fl (,+-lactano class 4) containing an initiator such as a polymerization catalyst, which is flowed into the mold as an additive. It is preferable that the resin is solidified by reaction in a mold, and then molded using a casting method in which poly is mixed with a mid-resin.

Among the ω-lactams, which include the 51E monomer, α
- Pi゛'7 Liton, α-Piperidone, ω-Enantracta 8 Helen-Cabri Mouth-171'7 Tam, ω-Capri'Nolactam, ω-Belargo 2 Noractam, (,
Decanolactam, ω-r: 7nf force, Noractam 11, ω
Rau[l-7-7 tanoh, or these C-a/l-kyl-substituted lactams, I and these σ) 1. ω-rakta,? - A mixture of 3 or 3.) can be obtained. ” - Used in 5 loquats, commercially available 1 imperial premium and (
, then, Ube Industries (Aji) Company ':＞ +, )3 v＞
11-, iE! The catalytic reaction catalyst is hydroxylated,
Shika, sodium, hydroxide, potassium, hydroxide, etc. 4) Use of known ω-lacta 2 polymerization catalysts 4 to 2)
= can be done) 1. The amount of Mo added is ω-ratata l, and sentence 1
A range of 0.1-0.5000% is preferred. Also,
The initiator and (mer) are N-acetate
Futano 5 or use or other triallisono! Nure-1., N-substituted yurimine derivative, 1
゛, carbonyl bisanridino, oxazoline derivative,
2-(N-Pheny, Rubenzimitoyl)! Yatoarido, 2-(N-7, phenylbenzimidoyl)ayatoanili!・, 2-N-Morifolinocyclo 1S, -J Senkawa 3-Nocarbokatazanilide, known isocyaner 1., pflubodiimide, and other compounds can be used. this! The amount of the initiator to be added is preferably within the range of 0.05-1.0% relative to the amount of the initiator (t-, I-").

In addition, the resin used in the wooden 1-piece method is 1. a2
．． 1.1) Limited to resin; 4-1 For example,
Ebokey/tree swelling, “i′~ril resin,’) !:r [
The reinforcing fibers pre-placed in the mold may be any of those used in fiber reinforced plastics. Typical examples of C) include aramid fibers, carbon fibers, glass fibers, and various organic fibers, but carbon fibers are most preferred. stomach. It is fine to have a 0 shape with fiber + 1, and it is good to have ζ (,) without braiding.

(11) of the reinforcing fibers, shown in Figure 3-4-) (, ~
, along the mold surface of the mold and/or the back surface of the n-1)
It is advisable to arrange the non-woven fabric 10 in order to obtain a good finish (2). , Lai's non-woven fabric tiJ is used.

The non-woven fabric (fiber density: l = 35 vo1%, f
-Maj, Ri is 2~20~01%(,",)(,nogaspecial(
-1 - Good flowability of liquid liquid] 5- preferred i,
,, L, 1 r, +! Then, the method of the present invention: ↓h gi
ld, 4 examples of implementation (, 'limited notes -, 1, e.g.,
L1 1st) Shown in Figure-4 Example 11. ;Okay, 5/-1
・1 moment 1 lack F "Add t5-after, -Teraya l:"
After completing the supply of the raw material liquid of F-I...＼, add the secondary force to the solidified liquid. −
L', -1: Is the primary j'1] pressure 1 before solidification is completed?
, ゛Ko silk; Continuation 1o de muiz (, Good.

Furthermore, the shape of the mold surface of the gold plate is formed as shown in Figures 4 to 7. From this, the required 0-shaped fiber, reinforced plus f-tsuku product 4, manufactured, 9 can be found 6, i.e., Figure 4 (,, as shown) 11, mold + i7
), then when 1a is a curved shape, by setting the node 2 to recover 11 and its r node to η(surface 2a, ?), the pressure applied to the -12 and the position 4 in the mold 1 are Depending on the amount and arrangement of the reinforcing fibers, it is possible to manufacture products in the shape of 21' squares or cylinders.
First, it goes without saying that the fiber content of the product can also be controlled as appropriate.

In addition, as shown in FIG. ! 11f
ii l A is deeply cut so that the cross section A is shaped, and the reinforcing fibers 1. TeI' for -1 and 2,
E force wo f4 addition rukotoni, i j',), lze
Concave shape j,: 11ji1 It is possible to manufacture a product with 11 curved shape by bending along the reinforcing fibers. At that time, since we are using a gas or liquid such as compressed air with the upper medium, the force acting in the isodirection (1, Y) Therefore, an i' gradient equal to that of the reinforcing fiber F-2 is applied to the reinforcing fiber F-1 in the side surface part Q'). Therefore, the reinforcing fibers can be well aligned with the mold surface 1a, and the side and bottom parts can be made to have the same thickness, which improves the accuracy of the thickness.

Furthermore, products with undercut shapes such as those shown in FIGS. 6 and 7 can be easily manufactured without requiring a complicated mold configuration.

FIG. 6 shows that the shape of the mold surface 2a of the sheet 2 is preformed in the shape of
J: f
y t,,-,, is arranged in a square three-shaped IJ.

ko・-')yo-',) i,,'reinforced fiber do' and no 1・? Set (-keep, 2,]=1-yo1.H),
Note: 2 i-1', 12'l i, -, l bird no 3
When adding 4, as shown in the figure, the reinforcing fiber rpa 4・a/
Dawono-nodo shape (,-katsu'jshi); force r+ in the situation
It-1-Kill,,Resin Note 5 (A2, after solidification (-Release-4, ;-)-2F,,LoJ 16
e4 stone 4 (, JE-ko5 things) f-mejiku-↓0
Taken during the -5'- clause ζ) Outside O, -2 or out flat.

Figure 7 is at the bottom of the figure.）Yo 9゛7＞'! -Ka・)・Mannijo,
"-)Product 4. Manufacturing place iζ 1.4 A) T, gold plate:) Divide IJ to -IA, !'B... By doing so, you can easily make 1 pickle 4 ru-" .

(Experiment example 1) Reinforced edge @ L in the mold T @ 30 cm x 1.5 c
Cut to size m(7) (carbon fiber plain weave',,
,,” C) Su (Toho Shi-yo〉・Manufactured by W3101) 2
0. Noni with wisdom placed in advance.

Enhancement 1ii [Constructs part of mold surface after placement. / and 17, silicone rubber with a thickness of 0.5 mm -1-(
(manufactured by Tyee Bolimar) is taken: j' if, no 7
- To close the car tee with the toe and the mold. about,
After raising the molding temperature to 1.5 degrees C, reinforcing fibers were added to the sheet using 25 kg of J-4E of . Next, KyaL phido, fu,)
Ut force of 2.5 kg/cm2 in the reinforcing fiber R,I
M → Injected I-Ci-so (UX 71 manufactured by Ube Industries, Ltd.), Shigetani, Gi and "r:" (So-responsive solidification to produce a product made of plate material), N conducted, L, above experiment. Example + 1J: Reinforcing fibers placed in T-me, the primary pressure is greater than the primary pressure. The secondary 1F horn has been added.

(Experimental Example 2) Using the same reinforcing fibers and resin (unreacted raw material liquid) as in Experimental Example I, after the resin injection was completed and before the completion of the solidification, the air pressure applied through the sheet was increased to 2. , 5k
g,/cm' to 3,0 kg,/c- (l,) The above second experimental example (42-order pressure is added. 1 is different from the first experimental example. 15, etc.) is the same as the first experimental example.

(Experimental Example 3) Secondary pressure, i.e., after the resin ρ' is completed but before the reaction solidification is completed (
,],]a2.5 kg/e-Meha et al.4. ,
Okg/'em" L rose 1.! J's secondary Y] -7
Kai, ・I and 1 are added, t:, , a and 1 are Experimental Example 1
and difference I2, others are the same. , (Comparative example) Carphone fiber navy blue cut into a size of 30<em>X I 5 cm: Plain weave recross (W3101 manufactured by Toho 1/-Yo:/)
Twenty layers were placed in the frame. gold temperature 15
The temperature was raised to 0 degrees C [later, 2.5 kg/cm
RIM-Nylon (72 parts manufactured by Kosansha Co., Ltd., 1.J
X21) was added at tJ and polymerized.

In addition, Experimental Examples 1, 2, 3, and Comparative Examples were cut to the same prescribed method and tested for each physical property shown in the table of vacancies. .

(Margins below) As shown in the test results in Table 11, the experimental examples of the present invention were compared to the comparative examples.
As is clear from the following explanation, the bending strength has been improved by the horn manufacturing method according to the present invention. 1. By applying pressure to the binding sheet, the metal plate 1 is made to have flexibility at least partially.
Inside the Gyahikui (pre-placed (,
In order to make the reinforcing wire 4 (jo (f), it is possible to easily control the condition of the fibers by using 1 (-7, which makes it easy to adjust the force) that is opposite to the reinforcing fibers. , the fiber W content can be controlled without changing the mold.
Therefore, it is possible to easily manufacture fiber-reinforced plastic products with high fiber content and excellent specific strength, which were difficult to manufacture using conventional molds, or products with different fiber color ratios.

In addition, even if the product has an undercut shape that cannot be removed from the mold using a normal mold, since a flexible sheet is used as part of the mold surface, it can be easily removed after 1F. The sheet can be removed 7' and the mold can be released, making mold drawing easy 1
,6 becomes.

Furthermore, T1 for gases such as compressed air, liquids, etc. 1b:
The reinforcing fibers are pressurized through the flexible node 1 by the Lf force medium which applies a force of 1 m i. ,)
Pressure is applied evenly and the reinforcing fibers are placed along the lines 1 and 1.

Kano, molding 1, necessary plan ηjB, 1 single side j', IJ? l), equipment ()) manufacturing = 1 stroke decreases by 4, etc.ff+1! , ′Yomohesurumo θ).

[Brief explanation of drawings]

Figure 1 shows S! used in the present invention or method. t, a schematic cross-sectional view of the position,
Fig. 2 (1), 7't, l\', Fig. 2 (Vl) is a process diagram showing the method of the present invention, Fig. 3 is an enlarged IIT side view of the main part showing another embodiment, Figures 4, 5, 6 and 7 show other embodiments of the present invention - 4 are sectional views, and Figures 8, 9 and 10 are sectional views showing dt examples. .

Claims (1)

[Claims] 1. After placing reinforcing fibers in a mold in advance, unreacted raw material liquid is injected into the mold, and a reaction is caused while impregnating the reinforcing fibers in the mold, thereby reinforcing the fibers. In a method for manufacturing a plastic product, a flexible sheet is used on at least a part of the mold surface of a mold that forms the product surface, and reinforcing fibers are placed in advance within the mold surface of the mold, and then fixing the sheet to a mold to form a cavity surrounded by the sheet and the mold;
Next, the sheet is pressurized from the outside to pressurize the reinforcing fibers arranged inside the cavity through the sheet, and under the pressurized state, the unreacted raw material liquid is injected into the cavity to inject the raw material liquid into the reinforcing fibers. A method for producing fiber-reinforced plastic characterized by causing a reaction while being impregnated. 2. The method according to claim 1, comprising a secondary pressure application step of increasing the pressure pressurizing the reinforcing fibers after the injection of the unreacted raw material liquid is completed and before the unreacted raw material liquid is reacted and solidified. .