JPH02160520A - Integral molding method of window - Google Patents

Abstract

PURPOSE:To improve adhesion strength by a method whereby a rough surface is formed in a peripheral part of a plastic glass, said plastic glass is then subjected to hard-coating treatment and applied with an adhesive. CONSTITUTION:A guide rod 121 of an upper mold 12 is inserted in a guide hole 111 of a lower mold 11, so that a molding is formed by cavities 13, 14 on which embossing patterns 21 are formed at peripheral parts thereof. A molten plastic glass is injected into the obtained molding, cooled and solidified. Accordingly, a plastic glass 3 having embossing patterns 25 in the peripheral part 31 thereof is obtained. Then, the glass 3 after being subjected to hard-coating treatment is inserted into a mold composed of a lower mold 45 and an upper mold 46. A resin 41 is injected into the mold, cooled and solidified. As a result, a window having the glass 3 and molding 4 integrally bonded securely via the embossing patterns 25, a layer 51 subjected to hard coating treatment and an adhesive layer 52 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for integrally molding a window in which a molding is integrally joined to the peripheral edge of plastic glass.

[Prior art]

As shown in FIG. 9, a window in which a resin molding 4 is integrally bonded to the peripheral edge of a plastic glass 3 is known.

Conventionally, such an integrally molded window is manufactured by applying a hard coat treatment to the surface of the plastic glass 3 using a silicone-based agent to protect the surface, then applying an adhesive to the periphery of the plastic glass 3, and then attaching the plastic glass 3 to the surface of the plastic glass 3. 3 into a mold and inject molding resin onto the peripheral edge portion (see FIG. 6, described later), and integrally join the molding 4 to the peripheral edge of the plastic glass 3 (see FIG. 7, described later). Manufactured by. That is, it is integrally molded by insert injection molding.

[Problem to be solved]

However, as described above, when an adhesive is applied to a hard-coated plastic glass surface, the adhesive is repelled by the water repellency of the hard-coat treatment agent, making it difficult to apply it uniformly to the plastic glass surface. Therefore, in the window obtained by integrating the molding by insert injection molding as described above, there is a possibility that the adhesive strength between the molding and the plastic glass 7 varies, and the joint portion may peel off during use.

In order to solve this problem, a method has also been proposed in which plasma treatment is performed after hard coating treatment to improve the coating properties of the adhesive (Japanese Patent Application Laid-Open No. 62-121734
However, such a method requires high costs for plasma processing equipment (
, wind products become expensive.

In view of these conventional problems, the present invention aims to provide a method for integrally molding a window with improved adhesive applicability and excellent adhesive strength.

(Means for solving il! I!) The present invention performs a hard coating treatment on the surface of plastic glass, firstly applies an adhesive to the peripheral edge thereof, and then places the plastic glass in a mold to form a mold for the peripheral edge portion. In a method of integrally molding a window in which a molding is integrally bonded to the peripheral edge of the plastic glass by injecting a resin for molding, the peripheral edge of the plastic glass is The method of integrally molding a window is characterized by forming an uneven surface on the surface, first applying a hard coat treatment to the surface, and then applying an adhesive.

In the present invention, when forming an uneven surface on the peripheral edge of plastic glass, an uneven surface such as a grain pattern is previously formed on the peripheral edge of the cavity in a mold for molding the plastic glass. This is done by injecting the plastic glass raw material into the mold and solidifying it.

As a result, the uneven surface of the mold is transferred to the plastic glass.

The above-mentioned uneven surface includes irregularly shaped grained birch, regular shaped unevenness,
Any grooves such as straight or curved grooves may be used.

The depth of the uneven surface is preferably 5 to 50 μm; if it is shallower than 5 μm, the wettability between the adhesive and the plastic glass will be poor.50. This is because if the depth exceeds um, the depth will be too deep, leading to problems of poor coating on the convex portions.

In addition, the above-mentioned peripheral part is the part where adhesive is applied, but 2
Both parts may be exactly the same or slightly different.
In other words, one of them may protrude slightly.

In addition, the above-mentioned hard coat treatment is performed prior to applying the adhesive as in the past, and the hard coat treatment agent is as follows:
There are boronoxane-based silicone hard coating agents such as trimethoxysilane. Also.

Thiolene type such as polyester, polyacrylate, etc.
There are UV (ultraviolet) curing hard coats such as radical polymerization type acrylic type or cationic polymerization type such as epoxy resin.

Further, such hard coating treatment involves dipping the plastic glass in the above-mentioned treatment agent.

This is done by roll coating. This results in 1
A hard coat treatment layer is formed on the surface.

Therefore, it is preferable that this hard coat treated layer has a thickness of 5 to 10 μm. If it is less than 5 μm, the surface protection of the plastic glass will not be sufficient, and if it exceeds 108 m, the uneven surface will become shallow and the wettability of the adhesive may deteriorate.

In addition, as plastic glass, polycarbonate,
There are injection molded products such as acrylic and ABS resin. As the adhesive, there are nylon-based adhesives, urethane-based adhesives, and the like. In addition, polyvinyl chloride and urethane are used as resin moldings.

It is made of polyolefin, etc., and is integrally formed on the periphery of plastic glass by injection molding.

Next, as a method for forming the above-mentioned uneven surface, there is a method of sandblasting the peripheral edge of a plastic glass that has been molded at one end.

This sandblasting method is a method of forming the uneven surface by slamming hard particles such as stainless steel, 5iC (TI carbide), -h-borundum, etc. onto the peripheral edge with a high-speed air flow. The hard particles used are fine particles with a diameter of 0.1 to 1.0 mm. In addition, the particle collision speed on the plastic glass surface is 30~
It is 100m/sec.

[Action and effect]

In the present invention, an uneven surface is formed on the peripheral edge of the plastic glass, and then a hard coat treatment is performed, and then an adhesive is applied. Therefore.

The wettability of the adhesive to the peripheral edge is improved, and the adhesive can be uniformly applied to the peripheral edge of the plastic glass.

Therefore, according to one aspect of the present invention, it is possible to provide a method for integrally molding a window with improved adhesive coating properties and excellent adhesive strength. Also, manufacturing costs are low.

Furthermore, when the uneven surface is formed using a mold during the production of plastic glass, the uneven surface can be provided at the same time as the plastic glass is molded, and the process can be shortened.

Also, when forming an uneven surface by sandblasting, the shape of plastic glass.

The uneven surface can be provided in any part regardless of the area and shape of the peripheral portion forming the uneven surface.

〔Example〕

First example Regarding the integral molding method of the window related to this example.

With reference to FIGS. 1 to 9, the steps from molding the plastic glass to integrally molding the window will be explained.

First, the method for molding plastic glass will be described. As shown in FIG. 5, the plastic glass is made by providing a textured pattern 25 as an uneven surface on the entire peripheral edge 31 of a right triangular plastic glass 3. Such plastic glass 3 is manufactured using a mold 1 shown in FIG.

The mold l consists of a lower mold 11 and an upper mold 12.

The lower mold 11 has a cavity 13 in the shape of a right triangle for molding plastic glass. The cavity 13
As shown in FIGS. 2 and 3, a grain pattern 121 is formed on the inner periphery.

Similarly, the upper die 12 is also as shown in FIG.

It has a cavity 14, and a grain pattern 21 is formed on the periphery of the cavity 14, similar to the cavity 13.

However, when molding the plastic glass 3,
The guide rod 121 of the upper mold 12 is inserted into the guide hole 111 of the lower mold 11.
is inserted to form a molding part with cavities 13 and 14, into which a molten plastic glass raw material is injected,
Cool and solidify.

As a result, the plastic glass 3 having the grain pattern 25 on one peripheral edge 31 shown in FIG. 5 was obtained, and then the entire surface of the plastic glass 3 was coated.

Hard coat treatment is performed using a conventional method. As shown in FIG. 6, the hard-coated plastic glass 3 has the following properties:
It is inserted into a mold consisting of a lower mold 45 and an upper mold 46. Then, resin 41 is injected into the mold, cooled and solidified, and as shown in FIGS. 7 and 8, the plastic glass 41 is
An integrally molded product of a window is obtained in which a resin molding 4 is integrally fixed to the peripheral edge of the window.

In the mold shown in the sixth part above, the lower mold 45 and the upper mold 4
When 6 and 8 are combined, the cavity is 451.46
1, the resin molding 4 is made to have a cross-sectional shape. Note that the recesses 452, 4 of the upper mold and lower mold
The molding resin does not flow into 62.

In addition, in the integrally molded window shown in FIGS. 7 and 9, FIG. 8 shows the state of the joint between the plastic glass 3 and the molding 4.

A grain pattern 25 is formed on the surface of the plastic glass 3, a hard coat treatment 7851 is applied thereto, an adhesive 52 is applied thereto, and the molding 4 is integrally provided on the adhesive 52.

As described above, according to the method of the two examples, the plastic glass 3 and the molding 4 have a grain pattern 25. Hard coat treatment layer 51. Through the adhesive 52, it is possible to obtain a window that is integrally and firmly joined.

Second Embodiment In the first embodiment, one peripheral edge (approximately fe11 from the peripheral edge)
A plastic glass 3 made of polycarbonate material and having a grain pattern 25 formed therein (width) was molded. The grain pattern 25 is
The depth is approximately 20 μm. Next, a polysiloxane-based hard coat treatment layer 51 was formed on the entire surface of the plastic glass 3, including the peripheral edge 31, to a thickness of about 8 pm.

After that, apply urethane adhesive to the peripheral edge 31 to a thickness of approximately 10 mm.
It was applied to μm. Then, the lower mold 45 shown in FIG.
Using a mold consisting of a mold and an upper mold 46, polyvinyl chloride resin was injected into the peripheral portion to obtain a window (FIG. 9) in which the plastic glass 3 and the molding 4 were integrally molded.

In the above, the adhesive is applied on the grain pattern at the periphery.

It had good wettability and was able to be applied evenly.

Further, in the window, the plastic glass 3 and the molding 4 were firmly joined.

Third Example In the first example, the grain pattern was formed on the peripheral edge of the plastic glass by sandblasting.

That is, two SiC particles having a particle diameter of 0.3 am were used, and they were caused to collide with the peripheral edge 31 of the plastic glass 3 at a flow rate of 80 m/sec together with pressurized air.

As a result, an embossed pattern with a depth of about 30 μm was formed on the peripheral edge. After that, the window was integrally molded in the same manner as in the first embodiment.

[Brief explanation of the drawing]

1 to 9 show the manufacturing method of the window in the first embodiment, FIG. 1 is a perspective view of a mold for molding plastic glass, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. FIG. 3 is an enlarged sectional view of part B in FIG. 4. FIG. 4 is a cross-sectional view of the mold, and FIG. 5 is a front view of the plastic glass with a textured peripheral edge. FIG. 6 is a sectional view showing the state of the window during molding. FIG. 7 is a sectional view showing the bonded state of the plastic glass and the molding, FIG. 8 is an enlarged view of portion C in FIG. 7, and FIG. 9 is a front view of the window. l...Mold for plastic glass molding. 21... Grain pattern of the mold. 25... Grain pattern of plastic glass. 3...Plastic glass. 31...periphery. 4...Mold 45.46...Window mold 51...Hard coat treatment layer Fig. 1

Claims (2)

[Claims] (1) Hard-coat the surface of the plastic glass, then apply adhesive to the periphery, then put the plastic glass into a mold, inject molding resin onto the periphery, and then In a method of integrally molding a window in which a molding is integrally joined to the peripheral edge of plastic glass, an uneven surface is formed on the peripheral edge of the plastic glass in a plastic glass mold during production of the plastic glass, and then the surface is A method for integrally molding a window, which is characterized by applying a hard coat treatment to the window and then applying an adhesive. (2) Hard coat the surface of the plastic glass, then apply adhesive to the periphery, then put the plastic glass into a mold, inject molding resin into the periphery, and then apply the adhesive to the periphery. In a method of integrally molding a window in which a molding is integrally bonded to the periphery of plastic glass, an uneven surface is formed on the periphery of the plastic glass by sandblasting, then a hard coat treatment is applied to the surface, and then an adhesive is applied to the periphery of the plastic glass. A method for integrally molding a window, which is characterized by applying.