JP5091522B2 - Surface treatment method for fiber reinforced resin molded products - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an epoch-making method for surface-treating a resin member that exhibits unconventional effects. <P>SOLUTION: The method for surface-treating a resin member is a surface-treating method to be conducted before forming an adhesive bond between resin members 1, and comprises subjecting the resin member 1 to a surface treatment by injecting slurry 4 being a mixture of a liquid 2 and an abrasive grain 3. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

The present invention relates to a surface treatment method for a fiber-reinforced resin molded product performed before bonding fiber-reinforced resin molded products to each other.

  For example, when assembling by bonding resin molded products 31 such as automobile parts, if the unnecessary material 32 adheres to the surface 31a of the resin molded product 31, sufficient adhesive strength cannot be obtained. It needs to be removed.

  Therefore, conventionally, when removing the unnecessary material 32 attached to the surface 31a of the resin molded product 31, the resin molded product 31 is immersed in a chemical solution (for example, a cleaning agent disclosed in Japanese Patent Application Laid-Open No. 7-11297) and the unnecessary material 32 is immersed. In general, a chemical treatment for removing the resin is performed, but the unnecessary material 32 is, for example, a mold release agent 32 used at the time of molding, and the mold release agent 32 is a resin molded product 31 at the time of molding as shown in FIG. When the resin surface layer portion 31A enters the state, the mold release agent 32 cannot be completely removed simply by dipping in the chemical solution.

  In order to completely remove the release agent 32 that has entered the resin surface layer portion 31A of the resin molded product 31, a process of cutting the resin surface layer portion 31A of the resin molded product 31 to the position where the release agent 32 has entered is effective. Yes, for example, sandpaper processing with sandpaper can be considered, but this sandpaper processing can cause uneven cutting when the resin molded product 31 is large or has a special shape (curved shape). When shaving, shavings scatter and it is not environmentally preferable.

  In particular, when the resin molded product 31 is a resin molded product 31 using a fiber reinforced resin, the resin surface layer portion 31A of the resin molded product 31 is excessively shaved from a depth position of about 5 to 10 μm from the surface of the resin molded product 31. Even if the existing reinforcing fibers 31B are exposed, sufficient adhesive force cannot be obtained. However, it is extremely difficult to perform the quantitative cutting without exposing the reinforcing fibers 31B by the above-described sandpaper treatment.

  In addition to the sandpaper treatment described above, as a treatment for cutting the resin surface layer portion 31A of the resin molded product 31, a sandblasting treatment in which abrasive grains are accelerated and injected by compressed air can be considered. The amount of shaving can be made constant as compared with the sandpaper treatment, and since the fine irregularities are formed on the treated surface and the surface area can be increased, an improvement in the adhesion can be expected.

  However, this sandblasting treatment is also unfavorable to the environment because the sprayed abrasive grains and shavings scatter to the surroundings as in the case of the sandpaper treatment described above. When the resin surface layer portion 31A is to be cut shallowly without exposing the reinforcing fiber 31B at the depth position, the abrasive grains must be made as small as possible, but when actually trying to spray fine abrasive grains Since an effective working force cannot be obtained due to air resistance (because fine abrasive grains cannot be struck against the work surface vigorously), it is not possible to perform a good shaving treatment.

  As described above, the present situation is that no treatment has been proposed so far that the release agent 32 that has entered the resin surface layer portion 31A of the resin molded product 31 can be satisfactorily removed.

JP 7-11297 A

As a result of repeatedly conducting various experiments and researches in view of the above-mentioned problems, the present inventor performs surface treatment of a fiber-reinforced resin molded article by injecting a slurry that is a mixture of liquid and abrasive grains. An innovative surface treatment method for a fiber-reinforced resin molded product has been invented that can reliably and satisfactorily remove unwanted substances that inhibit the adhesion before the fiber-reinforced resin molded products are bonded to each other.

  The gist of the present invention will be described with reference to the accompanying drawings.

A surface treatment method performed before adhering fiber reinforced resin molded products 1 to each other , wherein slurry 4 which is a mixture of liquid 2 and abrasive grains 3 is injected at an injection pressure of 0.2 MPa or more, and the fiber reinforced resin molding is performed. By removing the resin surface layer portion 1A so that the reinforced fiber of the product 1 is not exposed, the unnecessary material 5 attached to the surface 1a of the molded product 1 of the fiber reinforced resin is removed, and the fiber reinforced resin of the liquid 2 in the slurry 4 is removed. The present invention relates to a surface treatment method for a fiber-reinforced resin molded product , wherein the contact angle with respect to the molded product 1 is known to confirm the degree of removal of the unnecessary material 5 .

Moreover, it is a surface treatment method performed before adhering the fiber reinforced resin molded products 1 to each other, and in order to remove the unnecessary material 5 attached to the surface 1a of the fiber reinforced resin molded product 1, the liquid 2 and the abrasive grains 3 The slurry 4, which is a mixture of the above, is injected at an injection pressure of 0.2 MPa or more, and the contact angle of the liquid 2 in the slurry 4 with respect to the fiber-reinforced resin molded product 1 is ascertained to confirm the degree of removal of the unnecessary material 5. However , the present invention relates to a surface treatment method for a fiber reinforced resin molded product , characterized in that the resin surface layer portion 1A is removed so that the reinforcing fiber of the fiber reinforced resin molded product 1 is not exposed, and the unnecessary material 5 is removed .

The fiber-reinforced, characterized in that the surface treatment method of a fiber-reinforced resin molded article according to any one of claims 1, 2, resin content of the fiber-reinforced resin molded article 1 is 10 to 75% The present invention relates to a surface treatment method for a resin molded product .

Further, according to the claim 1 to 3 The surface treatment method of a fiber-reinforced resin molded article according to any one, a fiber-reinforced resin moldings, characterized by employing about 10μm less fine abrasive grains as the abrasive grains 3 This relates to the surface treatment method.

Moreover, in the surface treatment method of the fiber reinforced resin molded product according to any one of claims 1 to 4, the unnecessary material 5 is a release agent used when the fiber reinforced resin molded product 1 is molded. The present invention relates to a surface treatment method for a fiber-reinforced resin molded product.

Since the present invention is configured as described above, unlike the above-described conventional treatment, it is possible to perform a surface treatment that can reliably and satisfactorily remove unwanted substances that inhibit the adhesion before bonding between fiber reinforced resin molded products. This is an innovative surface treatment method for a fiber-reinforced resin molded product that has never been seen before.

  Embodiments of the present invention considered to be suitable will be briefly described with reference to the drawings.

The present invention, prior to bonding the fiber-reinforced resin molded article 1 with each other, the slurry 4 by spraying the surface of the fiber-reinforced resin moldings 1 is a mixture of liquid 2 and the abrasive grains 3 to the fiber-reinforced resin moldings 1 Process.

At this time, the abrasive grains 3 of the slurry 4 is caused to collide carried by the liquid 2 on the surface 1a of the fiber-reinforced resin molded article 1, the fiber-reinforced resin molded article 1 resin surface layer portion 1A by colliding the abrasive grains 3 Is removed, and the unnecessary material 5 attached to the surface 1a of the fiber reinforced resin molded product 1 is removed (the unnecessary material 5 that has entered the resin surface layer portion 1A of the fiber reinforced resin molded product 1 is removed), and further. Fine irregularities are formed on the surface 1a of the fiber-reinforced resin molded product 1.

Therefore, before the fiber reinforced resin molded products 1 are bonded to each other, unnecessary substances that become an obstruction factor for the bonding can be removed surely and satisfactorily, and fine irregularities are formed on the surface 1a of the fiber reinforced resin molded product 1. As a result, the surface area is increased, and thus the fiber-reinforced resin molded products 1 are firmly bonded to each other.

Further, in the present invention , since the slurry 4 which is a mixture of the liquid 2 and the abrasive grains 3 is sprayed to treat the surface of the fiber reinforced resin molded product 1, the sprayed abrasive grains 3 and shavings are held in the liquid 2. As a result, scattering to the surroundings is suppressed as much as possible, and even the fine abrasive grains 3 are carried by the liquid 2 having a large mass and move to the surface 1a of the fiber reinforced resin molded product 1. It may conflict well, cutting processing up shallow position from the surface 1a of the fiber-reinforced resin molded article 1 will be performed reliably, thus, by appropriately selecting the abrasive grains 3, the front surface 1a of about 5~10μ The process of shaving the resin surface layer portion 1A shallowly without exposing the reinforcing fiber 1B in the depth position can be performed.

In the present invention , a test (water wettability test) for confirming the degree of removal of the unnecessary material 5 that has been conventionally performed after the removal processing of the unnecessary material 5 is also performed extremely efficiently.

That is, in this test, as shown in FIG. 8, water W is dropped on the surface 1a of the fiber reinforced resin molded article 1 after the removal treatment, and the contact angle R of the water W with respect to the surface 1a of the fiber reinforced resin molded article 1 is measured. Although the degree of removal of the unwanted object 5 is confirmed by confirmation (the larger the contact angle R is, the better the degree of removal of the unwanted object 5 is). The water W dropped on the surface 1a of the fiber reinforced resin molded product 1 is confirmed to be a ball or a film, and the smaller the contact angle R, the water W Becomes ball-shaped (the degree of removal of the unwanted matter 5 is low and the hydrophilicity is low), and the water W becomes a film shape as the contact angle R is large (the degree of removal of the unwanted matter 5 is high and the hydrophilicity is high).

In this respect, in the present invention , since the liquid 2 of the slurry 4 used when removing the unnecessary material 5 can be used as it is for the test, the unnecessary material 5 adhering to the surface 1a of the fiber reinforced resin molded product 1 is used. And a test for confirming the degree of removal of the unnecessary material 5 can be performed efficiently and quickly.

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

The present embodiment is a method of treating the surface 1a of the fiber reinforced resin molded product 1 performed before bonding the fiber reinforced resin molded products 1 to each other, and is a slurry that is a mixture of the liquid 2 and the abrasive grains 3 described later. This is done using a surface treatment device that sprays 4.

  Specifically, as shown in FIG. 2, the surface treatment apparatus has a function of conveying an object to be processed, and includes a slurry injection unit 9, a slurry storage unit 6 disposed at a lower position, and the slurry storage unit. 6, and a slurry transfer unit 8 that transfers the slurry 4 to the slurry injection unit 9 via the pump device 7. The slurry 4 injected from the slurry injection unit 9 is sent to the slurry storage unit 6 and reused. This is a configuration.

  The slurry storage unit 6 can store a predetermined amount of the slurry 4 and is provided with a slurry stirring function for constantly stirring the slurry 4 stored therein.

As shown in FIG. 1, the slurry injection unit 9 is provided with a slurry injection main body 9A disposed above the conveyance unit 10 for conveying the fiber-reinforced resin molded product 1, and projecting downward from the slurry injection main body 9A. And a nozzle body 9B.

  The slurry injection main body 9A is connected to the above-described slurry conveyance unit 8 on the side surface portion thereof, and to the upper surface portion is connected to the compressed air conveyance unit 11 provided in a separate circuit, so that the slurry supplied from the slurry conveyance unit 8 is connected. 4 is accelerated by the compressed air supplied from the compressed air conveying section 11, and is injected from the nozzle body 9B at a predetermined injection speed.

When the slurry 4 in which a mixture of a liquid 2 to about 10μm or less of fine abrasive 3 in the jet velocity of about 50 mm / sec is jetted to the surface 1a of the fiber-reinforced resin molded article 1, the surface 1a of the fiber-reinforced resin moldings 1 Unnecessary matter 5 adhering to the surface of the fiber reinforced resin molded article 1 is finely removed.

The nozzle body 9B is configured as a wide gun type in which the nozzle opening has a square shape, and the nozzle opening is set to have a width equal to or greater than the width of the fiber reinforced resin molded product 1. Therefore, the slurry 4 is injected with a width equal to or greater than the width of the fiber reinforced resin molded product 1.

  Further, the slurry 4 used in the present embodiment is a mixture of the liquid 2 and the fine particle abrasive grains 3.

  As the abrasive grains 3, fine particles of alumina, ceramic, glass, resin, stainless steel and the like are appropriately employed.

Using the surface treatment apparatus S having the above configuration, the surface treatment was performed on the fiber-reinforced resin molded article 1 under the following processing conditions.
Abrasive grain: Alumina # 2000 (average grain size 7μ)
Air pressure: 0.2 MPa
Nozzle width ... 90mm
Nozzle moving speed ... 50mm / sec
Nozzle distance to the surface 1a of the fiber reinforced resin molded product 1 ... 50 mm

Figure 3 as a fiber-reinforced resin molded article 1 as shown tree fat content adopts the 10-75% of the fiber-reinforced resin moldings, as a slurry 4, abrasive grains 3 (alumina) liquid 3 (water) Slurry 4 having a volume ratio of 20% was used.

When treated with the processing conditions, by the process of reciprocating the fiber-reinforced resin molded article 1 as shown in FIG. 4 and 6, unwanted substances on the surface 1a of the fiber-reinforced resin molded article 1 5 (release agent ) Was uniformly removed, and a uniform processed surface (fine uneven surface not shown) with no unevenness was obtained. The nozzle body 9B may be reciprocated with respect to the fiber reinforced resin molded product 1.

In addition, the present inventor has made it possible to reduce the grain size of the abrasive grains as much as possible depending on the requirements of the processing amount and the surface roughness, according to various surface experiments by changing the conditions and the like. It has been confirmed that good processing is performed. If the abrasive grains 3 have a large particle diameter, the reinforcing fibers 1B of the fiber-reinforced resin molded product 1 are exposed with the force of collision.

FIG. 9 shows the change in the amount of shaving when the air pressure is changed under the above-mentioned conditions. From this experiment, it was confirmed that 0.2 MPa or more was sufficient ( fiber reinforcement). When the resin molded products 1 are bonded to each other, they can be processed so that sufficient adhesive strength is obtained.

Further, in this example, a test (the water wettability test in FIG. 8 described above) for confirming the degree of removal of the unwanted material 5 on the surface 1a of the fiber reinforced resin molded product 1 subjected to the removal process is performed.

Specifically, after the surface treatment described above is performed and the unnecessary material 5 attached to the surface 1a of the fiber reinforced resin molded product 1 is removed, the fiber reinforced resin molded product 1 of the liquid 2 in the slurry 4 used in this surface treatment is used. The degree of removal of the unwanted material 5 is confirmed by knowing the contact angle with respect to.

  As shown in FIGS. 4 and 5, in the middle of the removal process, a part of the unnecessary material 5 still remains, so the liquid 2 in the slurry 4 becomes a ball shape, as shown in FIGS. In addition, in the final stage of the removal process, since the unnecessary material 5 does not remain, the liquid 2 in the slurry 4 becomes a film.

In this embodiment, the nozzle body 9B related to the slurry injection unit 9 is reciprocated the number of times that the unnecessary material 5 is supposed to be completely removed to perform the removal process, and then the slurry from the slurry injection unit 9 is removed. 4 is stopped, and the degree of removal of the unwanted object 5 is confirmed by knowing the contact angle of the liquid 2 in the slurry 4 with respect to the fiber-reinforced resin molded product 1, but the degree of removal of the unwanted object 5 is not confirmed. The surface treatment may be performed, that is, the movement of the nozzle body 9B may be repeatedly stopped, and the degree of removal of the unnecessary material 5 may be confirmed each time the nozzle body 9B is stopped.

FIG. 10 shows the degree of removal when the air pressure is changed under the above-mentioned conditions, and there are portions where the liquid 2 becomes a ball shape as much as 0.2 MPa, but it is only a slight amount, and 0.2 MPa If it was above, it has confirmed that it could fully implement | achieve (it can process to the state from which sufficient adhesive strength is obtained when bonding the fiber reinforced resin molded products 1 mutually).

Since the present embodiment is configured as described above, it is possible to reliably and satisfactorily remove the unnecessary material 5 (release agent) that becomes an inhibition factor of the adhesion before the fiber-reinforced resin molded articles 1 are adhered to each other. since the surface area by fine irregularities on the surface 1a of the fiber-reinforced resin molded article 1 is formed it becomes wider, so that the firm adhesion of the fiber-reinforced resin molded article 1 with each other is performed.

Further, in this embodiment, since the slurry 4 which is a mixture of the liquid 2 and the abrasive grains 3 is sprayed to perform the surface treatment of the fiber reinforced resin molded product 1, the sprayed abrasive grains 3 and shavings are transferred to the liquid 2. The dispersion to the surroundings is suppressed as much as possible, and even the fine abrasive grains 3 are carried by the liquid 2 with a large mass and are urged to the surface 1a of the fiber reinforced resin molded product 1 may conflict well, cutting processing up shallow position from the surface 1a of the fiber-reinforced resin molded article 1 will be performed reliably, thus, the fiber-reinforced using by suitably selecting the abrasive grains 3, for example, fiber reinforced resin Even if it is the resin molded product 1, the process which shaves the resin surface layer part 1A shallowly can be performed, without exposing the reinforced fiber 1B in the depth position of about 5-10 micrometers from the surface 1a.

Moreover, since the liquid 2 of the slurry 4 used when removing the unnecessary material 5 can be used for the test as it is in this embodiment, the unnecessary material 5 adhering to the surface 1a of the fiber reinforced resin molded product 1 can be used. The test for confirming the removal and the degree of removal of the unnecessary material 5 is efficiently and quickly performed.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is a perspective view which shows a present Example. It is explanatory drawing of the surface treatment apparatus which concerns on a present Example. It is sectional drawing which shows the fiber reinforced resin molded product 1 before the process by a present Example. It is explanatory drawing of the surface treatment method of the fiber reinforced resin molding 1 which concerns on a present Example. It is explanatory drawing of the surface treatment method of the fiber reinforced resin molding 1 which concerns on a present Example. It is explanatory drawing of the surface treatment method of the fiber reinforced resin molding 1 which concerns on a present Example. It is explanatory drawing of the surface treatment method of the fiber reinforced resin molding 1 which concerns on a present Example. It is explanatory drawing of the surface treatment method of the fiber reinforced resin molding 1 which concerns on a present Example. It is explanatory drawing showing the result of experimenting the effectiveness of a present Example. It is explanatory drawing showing the result of experimenting the effectiveness of a present Example. FIG. 10 is a cross-sectional view showing a resin molded product 31 before processing according to a conventional example.

1 Fiber reinforced resin molded product
1A resin surface layer part 1a Surface 2 Liquid 3 Abrasive grain 4 Slurry 5 Unnecessary

Claims (5)

A surface treatment method performed before bonding fiber reinforced resin molded products to each other , wherein a slurry, which is a mixture of liquid and abrasive grains, is injected at an injection pressure of 0.2 MPa or more, and the reinforced fiber of the fiber reinforced resin molded product By removing the resin surface layer part so as not to be exposed, the unnecessary material adhering to the surface of the fiber reinforced resin molded product is removed, and the contact angle of the liquid in the slurry with respect to the fiber reinforced resin molded product is known and the unnecessary material is removed. A method for surface treatment of a fiber-reinforced resin molded product , characterized by confirming the degree of removal of an object . A surface treatment method performed before adhering fiber reinforced resin molded products to each other, wherein a slurry, which is a mixture of liquid and abrasive grains , is removed in order to remove unnecessary substances adhering to the surface of the fiber reinforced resin molded product . Spraying at an injection pressure of 2 MPa or more, recognizing the contact angle of the liquid in the slurry with respect to the fiber-reinforced resin molded product and confirming the degree of removal of the unnecessary material, the reinforcing fibers of the fiber-reinforced resin molded product are exposed. A surface treatment method for a fiber-reinforced resin molded product , wherein the unnecessary surface is removed by scraping the resin surface layer portion . In the method of surface treatment of a fiber-reinforced resin molded article according to any one of claims 1, 2, the fiber reinforced resin molding, wherein the resin content of the fiber-reinforced resin moldings is 10 to 75% Surface treatment method. In the claims 1-3 or a surface treatment method of a fiber-reinforced resin molded article according to item 1, the fiber-reinforced resin molded article surface treatment, characterized in that employing about 10μm less fine abrasive grains as the abrasive grains Method. The surface treatment method for a fiber reinforced resin molded product according to any one of claims 1 to 4, wherein the unnecessary material is a release agent used in molding the fiber reinforced resin molded product. A surface treatment method for a fiber-reinforced resin molded product.

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