JPS61164817A - Apparatus for exposing reinforcing fiber present in fiber reinforced resin body - Google Patents

Abstract

PURPOSE:To remove a resin matrix at high speed thereby enabling reinforcing fiber present therein to be exposed, by providing a pair of jetting bodies that can clamp slidably a prescribed part of a fiber reinforced resin body, forming orifices in each of the jetting bodies, and feeding a heated resin solution alternatively to the jetting bodies. CONSTITUTION:A pair of jetting bodies 11 that are directed toward the inside of seals 5 are provided in a main body 1, and each of the jetting bodies 11 has a corrugated surface that can contact at its ridge sections 11a slidably with a resin body 3 and is provided with liquid jetting orifices 11b in its recesses sections. The orifices 11b are in communication with liquid chambers 11c in the jetting bodies 11. A resin removing liquid 14 heated by heaters 17 is pumped to a change-over apparatus 12 via a pipeline 13 by the action of a pump 14 and is fed via pipelines 13a, 13b alternately to the liquid chambers 11c of the jetting bodies 11. As a result, the resin removing liquid is jetted alternatively via the liquid jetting orifices 11b to the end sections of the resin body 3, and while the resin body 3 is oscillated, the resin matrix 3a is removed rapidly by the dissolving action of the resin removing liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for exposing reinforcing fibers of a fiber-reinforced resin body formed by incorporating various fibers such as glass fibers, carbon fibers, or aramid fibers into polyester resin or epoxy resin. It is related to.

Structure of the conventional example and its problems As shown in FIG. 8, a fiber-reinforced resin body (
102), conventionally, as shown in FIG.
108), and a secondary laminated bonded resin body (106) in which glass fiber (105) is included in the resin base material (1G4) is formed between both tapered surfaces (10g), or as shown in Fig. 10. Then, two resin bodies (102) that do not have tapered surfaces are butted together at their ends, and both resin bodies (102)
) in which a secondary laminated bonded resin body (106) is formed extending between the ends on one side of the resin body (106), or as shown in FIG. A secondary laminated bonded resin body (1
A double-wrap method was adopted to form the 0S).

However, in any of these methods, the glass fiber cannot pass through the interface between the two resin bodies (102) to be joined and the interface τ between both the resin bodies (102) and the bonded resin body (106), and therefore, the joint The strength of the resin body itself to be bonded cannot be increased, which poses a problem in the application of the resin body.

In order to increase the strength of the joint, the resin base material near the joint end of the two fiber-reinforced resin bodies was dissolved and removed to expose the reinforcing fibers, and the exposed fibers of both resin bodies were intertwined (wrapped). ), it is possible to harden this part with resin.

However, it has been thought that there is no technology for separating the resin base material and the reinforcing fibers because once the resin has been cured, it cannot be dissolved by simple methods.

OBJECTS OF THE INVENTION An object of the present invention is to provide a reinforcing fiber exposing device for a fiber-reinforced resin body, which can remove the resin base material at high speed and expose the internal reinforcing fibers so that subsequent bonding processing etc. can be carried out advantageously. Our goal is to provide the following.

Structure of the Invention In order to achieve the above object, the present invention provides a pair of ejection bodies that slidably sandwich a predetermined portion of a fiber-reinforced resin body,
A reinforcing fiber exposure device for a fiber-reinforced resin body is provided, in which a plurality of orifices are formed on each of the mutually opposing sides of these jet pairs, and a switching supply means is provided for alternately supplying heated resin solution to both jet bodies. provide.

According to the above configuration, the resin base material of the resin body is affected by the erosion and dissolution action of the resin removal liquid, the thermal energy imparted to the resin removal liquid, and the motion of the resin removal liquid that increases at high speed when passing through the orifice. The resin is effectively removed by the cooperation of the energy and the vibrational energy given to the resin body by alternately spouting the resin removing liquid from the jetting body.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, (1) is a main body with a U-shaped cross section, and a handle (2) is attached to the rear end of this main body (1). The main body (1) is open at the front end and the sides, so that the resin matrix (8a) (for example, polyester resin, epoxy resin, etc.) is reinforced with reinforcing fibers (8b) (for example, glass fiber, carbon fiber, or aramid). The fiber-reinforced resin body (3), which is formed by incorporating a roving or cloth made of fibers, can move laterally.

At the front end of the main body (1), there is a pair of air jet seals (5
) are provided with rectangular holding protrusions (4) that hold them facing each other. Each seal (5) has a corrugated surface that slidably contacts the resin body (3) at the peak (5a), and
Air jet orifices (5b) are provided corresponding to the valleys. The orifice (5b) of each seal (5) communicates with an air chamber (6) formed in the corresponding retaining projection (4), the air chamber (6) being formed in the body (1) and the handle (2). Air pump (9) via passage (7) (8) and pipe QO
is connected to. Inside the main body (1) and inside the seal (5), a pair of ejecting bodies a are provided facing each other. Each spouting body has a corrugated surface that slidably contacts the resin body (3) K at the peak (11a), and is equipped with a liquid jetting orifice (llb) corresponding to the valley, and these orifices (
llb) is a liquid chamber (llb) formed inside the ejector (11).
c).

The liquid chambers (IIC) of both jet bodies αη are connected to a switching device via a conduit (18a) (xab) extending in the handle (2), which switches the switching bag fi! (2) is connected via piping a:i to the pump α→ which pumps the resin removal liquid Q5 heated by the heater αη in the liquid container chamber.

The switching device @, as shown in Fig. 8, connects the pipe (18a)
A piston 4 with a piston rod 4 is guided in this cylinder Q barrel J'. Piston rod 4 is rotatably connected to one end of link ■, and the other end of link Qυ is connected to rotor (2
) is rotatably connected to the Therefore, when the rotor (2) rotates in the direction of the arrow, the piston (4) reciprocates within the cylinder and alternately opens and closes the pipes (18a) and (18b). At each opening side of the main body (1), a substantially U-shaped inflatable seal is provided which can be inflated and deflated by an air supply/suction device (not shown). Furthermore, the main body (1) is equipped with a discharge hole (c) that communicates with a discharge pipe extending from the handle (2), and the discharge pipe is a pipe in which a decompression pump holder and a filter holder are arranged. It is connected to the liquid container aQ via (e).

The reinforcing fiber exposure device having the above configuration operates as follows. That is, with the handle (2) held manually or mechanically and the end of the resin body (3) inserted into the main body (1) K, the exposure device is moved relative to the resin body (3). Ru.

The resin removal liquid (g) heated by the heater αη is pumped through the pipe q3 to the switching device 0 by the action of the pump a4, and is further transferred to the switching device 0 through the respective pipes (
xaa) (1ab) through the liquid chamber (l
lc) alternately. As a result, the resin removal liquid is alternately ejected from both the ejection bodies Qυ toward the end of the resin body (3) through the liquid ejection orifice (llb), and while the resin body (3) vibrates, it is mainly heated. The resin base material (8a) of the resin body (3) is dissolved by the dissolving action of the resin removal liquid.
is quickly removed. During this base material removal operation,
The front end of the main body (1) is sealed by the air jet ejected from the air ejection orifice (5b) of the seal (5), and the sides of the main body (1) are sealed by the incre-sheet seal □.

In addition, the resin removal liquid containing the dissolved resin and some undissolved resin particles passes from the discharge hole (c) through the pipe line (7) and piping -, is purified by a filter, and then returned to the liquid container QG. .

As the resin removal liquid, a solvent alone or a mixture of a solvent and an erosive agent can be used. Here, the solvent includes chlorine-containing hydrocarbons (e.g., methylene chloride, chloroform),
aprontic ionic systems (e.g. demethylformamide, dimethyl sulfoxide), Kents (e.g.
Methyl ethyl group, acetone), esters (for example, methyl acetate), ethers, etc. are used. Erosion agents include non-ionic (e.g. polyoxyethylene alkyl ether, polyoxyethylene alkyl phenol ether), anionic (e.g. alkyl sulfate, alkyl naphthalene sulfonate), and cationic (e.g. quaternary ammolyrum salt) etc. can be used.

The reinforcing fiber exposing device shown in FIGS. 1 to 8 is particularly suitable for application to a fiber-reinforced resin body as shown in FIG. 4. That is, the illustrated resin body (3) has an uncured or incompletely cured portion (8 are doing. The soft portion (8X) can be formed by incorporating a pair of tapes impregnated with an anti-hardening agent during lamination of the resin body (3). Materials for the tape ■ include cloth made of cotton fibers, acrylic fibers, etc.
Examples include polymeric films such as polyvinyl alcohol, polyamide, polyester, cellophane, and even paper sheets.

When the resin base material (8a) is formed of a polyester resin, a reaction inhibitor (reaction inhibitor) can be used as a curing inhibitor.
hibitor), reaction inhibitor
retardar) and radical scavengers (radi
cal scavengers) alone or in mixtures are used, examples of which include quinones (e.g. hydroquinone, benzoquinone, chloranil), nitro compounds (e.g. 2,2-diphenyl-1-picrylhydrazyl, trinitrotoluene). , anion oxide, iron chloride, iodine, etc.

On the other hand, when the resin base material (8a) is formed by cross-curing the epoxy resin with a curing agent, the curing inhibitor generally has the same functional group that reacts with the epoxy group of the epoxy resin at high speed and high reaction rate. They can be classified into compounds that have one functional group in the molecule, and compounds that have one functional group in the same molecule that reacts with the crosslinking functionality of the curing agent at high speed and high reaction rate.

As the hardening inhibitor for the front sound, aliphatic dialkylamine,
Examples include alkoxy anions and thioalkoxy anions. On the other hand, the latter curing inhibitors include monofunctional epoxy compounds such as glycidyl ether, glycidyl ester, glycidyl ester, glycidol, etc., and monofunctional thioepoxy compounds in which the oxygen of the epoxy group in these monofunctional epoxy compounds is replaced with sulfur. Further examples include monofunctional carboxylic acids.

FIG. 5 shows the resin body (3) after being treated with the apparatus shown in FIGS. 1 to 8, and the reinforcing fibers (8b) are exposed at the ends of the resin body (3). There is. The exposed reinforcing fibers (3b) of this resin body (3) are alternately overlapped with the exposed reinforcing fibers (sb') of another similarly treated resin body (≦), as shown in FIG. After that, as shown in FIG. 7, the overlapping portion is hardened with resin 0υ to form a joint.

In FIG. 4, a pair of tapes (7) are included, but the pair of tapes may be attached to the outer surface of the resin body (3) immediately after the resin body (3) is laminated. Furthermore, although the apparatus shown in FIGS. 1 to 8 is particularly suitable for processing resin bodies having soft parts, it takes a little more time to process resin bodies that are completely cured as a whole. The same applies.

Effects of the Invention As described above, in the reinforcing fiber exposure device for a fiber-reinforced resin body according to the present invention, a pair of ejecting bodies that slidably sandwich a predetermined portion of the resin body are provided, and these ejecting bodies are arranged so as to face each other. A plurality of orifices are formed on each side of the ejection body, and a switching supply means is provided to alternately supply heated resin removal liquid to both jet bodies, so that the dissolving action of the resin removal liquid and the synergistic effect of various energies can be achieved. By doing so, the resin base material of the resin body can be efficiently removed and the reinforcing fibers in a predetermined portion can be exposed to advantageously perform subsequent secondary processing.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing a reinforcing fiber exposure device according to an embodiment of the present invention, FIG. 2 is a plan view of the irises location in FIG. 1,
FIG. 8 is a schematic configuration diagram showing a switching device in the exposure device, FIG. 4 is a side view showing a fiber-reinforced resin body suitable for use with the exposure device of the present invention, and FIG. This is a side view showing the same resin body, FIG. 6 is a side view showing the state after the exposed reinforcing fibers of the same resin body are alternately overlapped with the exposed reinforcing fibers of another resin body, and FIG. 7 is a side view showing the state after being joined. FIG. 8 is a side view showing a normal fiber-reinforced resin body, and FIGS. 9 to 11 are side views showing a conventional method of joining resin bodies.

Claims (1)

[Claims] 1. A pair of ejecting bodies that slidably sandwich a predetermined portion of the fiber-reinforced resin body is provided, a plurality of orifices are formed on each of the mutually opposing sides of the ejecting bodies, and heated resin is formed in both ejecting bodies. A reinforced fiber exposure device for a fiber reinforced resin body, which is provided with a switching supply means for alternately supplying a removing liquid.