JPH0694760B2 - Method for manufacturing window glass member - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a window glass member suitable for an automobile window glass or a building window glass, and in particular, a window glass member made of a glass plate having a gasket formed in a peripheral portion in advance. The present invention relates to a manufacturing method of.

The front glass and rear glass of an automobile are usually attached to a window frame of a vehicle body through a gasket (the gasket in the present invention is sometimes called a wind seal or a molding). The gasket is usually made of rubber or elastomer, and has the role of isolating the outside of the vehicle body (preventing the circulation of air and the invasion of rain) and relaxing the stress applied to the window glass from the window frame. Conventionally, the attachment of the window glass has often been performed by a physical fixing method, but in recent years, an adhesive method has been widely used. The adhesive method has a feature that it can be easily attached and the window frame and the gasket may have a simple structure. FIG. 2 is a partial cross-sectional view showing an example of the attachment portion of the window glass attached by the bonding method. The glass plate (1) is attached to the window frame (3) via the gasket (2), and the gasket (3) and optionally the surface of the glass plate and the window frame (3) are bonded together with an adhesive (4). There is. In many cases, an isolation material called a dam or the like is provided between the glass plate (1) and the window frame (3) in order to seal the adhesive so that the adhesive does not flow out toward the center of the glass plate (to the right in the figure) during bonding. 5) is provided.
Separator material (5) may be plate glass (1) and window frame (3), depending on the case.
Also has a role of maintaining a gap. The separating material (5) is often used by being fixed in advance to a predetermined position on the surface of the window frame or the glass plate by adhesion or adhesion before adhesion. The separator is usually made of a softer material (that is, lower in hardness) than the gasket, and often enhances the sealing property with the window frame and the leakage prevention effect of the adhesive.

As a method of attaching the gasket to the peripheral portion of the glass plate, a method of fitting a linear gasket member formed by extrusion molding or the like around the glass plate is usually adopted. But,
This method is not economical because it requires a large number of steps and has many manpower. In order to solve this problem, the present inventor
Previously, a glass plate was placed in a molding die, and a melt of rubber or elastomer or a raw material mixture capable of forming rubber or an elastomer was injected into the molding die, and a gasket was formed around the glass plate in the molding die. A method for producing a window glass member made of a glass plate with a gasket by a method of taking it out from a molding die was found, and a patent application was filed (JP-A-57-
(See Japanese Patent No. 158481). By adopting this method, the above-mentioned problem regarding the attachment of the gasket was solved, but when attaching the obtained window glass part to the window frame by an adhesive method,
The isolation material needs to be attached, which requires new steps and manpower.

In the method of manufacturing a glass plate with a gasket as described above, there is known a method of integrally molding a separator with a gasket (see Japanese Patent Laid-Open No. 60-104412). The window glass member according to this method has a structure in which a gasket and a separator are connected by a connecting member called a bridge member. The synthetic resin raw material injected into the gasket forming cavity passes through the connecting passage to form the separator. The synthetic resin in the connection passage serves as a bridge member while flowing into the cavity to form a separator. In this method, the gasket and the separator are necessarily made of the same material. However, this is not desirable because both have different functions and different physical properties are required. As mentioned above, the separator is preferably made of a material having lower hardness than the gasket,
On the other hand, it is desirable that the gasket is made of a material having higher hardness and better mechanical properties than the separator. Therefore, it is considered that such a requirement cannot be satisfied by the method of integrally molding the separator and the gasket.

The present invention provides a method for solving the above-mentioned problems, and when molding a gasket and a separator in a molding die, each material and its raw material are injected simultaneously or sequentially from different injection ports of the molding die. The present invention is directed to a method of manufacturing a window glass member having a gasket and a separator attached thereto, which is characterized in that the gasket and the separator are molded. That is, the present invention relates to a method for manufacturing a window glass member made of a glass plate having a gasket provided in the peripheral portion of the glass plate and a separator provided on one surface of the glass plate with a predetermined gap from the gasket. , A glass plate is placed in a molding die, a gasket forming cavity and a separator forming cavity are formed between the glass plate and the molding die inner surface, and a gasket material or a raw material of the material is injected into the gasket forming cavity. To form the gasket, and inject the separator material or the raw material of the material different from the gasket material into the separator forming cavity from a position different from the injection position of the gasket material or the raw material of the material. A method of manufacturing a window glass member, characterized in that I will provide a.

FIG. 1 shows a plan view of a window glass member obtained by the present invention. This window glass member is a glass plate (1), a gasket (2) attached to the periphery thereof, and a separator (5) provided with a predetermined gap from the gasket (2).
Consists of. A partial cross section near the peripheral portion corresponds to the glass plate (1), the gasket (2), and the separator (5) shown in FIG.

FIG. 3 shows a schematic plan view showing the pattern of the gasket and the separator. The gasket (2) is formed of the gasket forming material injected from the injection position (X), and the separator (5) is formed of the separator forming material injected from the injection position (Y). The gasket forming material is injected from a direction substantially indicated by an arrow on the paper surface, and the separator forming material is injected from a direction substantially perpendicular to the paper surface (illustrated) or a direction on the paper surface.

The pattern of the gasket and the separator is not limited to the example shown in FIG. For example, the positions of the material injections (X) and (Y) are arbitrary, and in some cases (for example, a movable window glass on the side of an automobile), the gasket and the separator are not only the entire circumference of the glass plate but also 1 to 3. It may be formed only on the side. Further, the gasket and the separating material do not always have to be placed opposite to each other, for example, a window glass member in which the gasket is formed on the entire circumference of the glass plate and the separating material is formed only on three sides. Good.

FIG. 4 is a cross-sectional view showing an example of a molding die for carrying out the method of the present invention. The molding die comprises an upper die (10), a divided first lower die (11) and second divided lower die (12), and a support die (13). Type (1
0) and the first lower mold (11), a gasket forming cavity (14) is formed between the glass plate (1) and the first lower mold (11) and the second lower mold (12). A separator forming cavity (15) is formed therebetween. At the contact portion between the glass plate (1) around each cavity and the molding die, sealing material (16), (17), () made of an elastic material is provided to prevent leakage of the material injected into the cavity. 18) is preferably provided. Gasket material, etc. is the first inlet (19)
Is injected into the gasket forming cavity through the runner (20) from the second injection port (21) and the separator forming material (1) is passed through the runner (22).
5) is injected. After the injected material has solidified, the upper mold (1
0) is opened and the window material is taken out. Since the runner (2) is usually long, the runner (2
It is easier to be restricted than materials passing through 0). When the material of the separator is a thermoplastic resin, it is preferable to perform molding by using this runner (22) as a hot runner. On the other hand, in the case of materials such as thermosetting resin, 1
It is necessary to lower the support mold (13) every time molding is performed to remove the solidified material in the runner (22).

The glass plate used in the present invention may be so-called processed glass such as tempered glass or laminated glass used as window glass for automobiles, or bent glass. Of course, it may be an unprocessed glass plate used as a building window glass. Further, the peripheral portion of the glass plate may be subjected to a treatment for increasing the adhesive strength between the gasket or the separator and the glass plate. For example, a glass plate having a predetermined portion coated with a primer can be used. Also, since the surface on which the gasket or separator is formed can be seen through from the opposite side, it may cause a visual problem.Therefore, cover the surface with these parts and the surface of the gap between the gasket and separator with a blindfold. It is also possible to apply an opaque coating or to adhere an opaque band-shaped material. FIG. 5 shows a partial cross-sectional view of an example of a glass plate subjected to such a treatment. An opaque thin layer (21) such as ceramic paint colored in black or the like is formed on one end of one surface of the glass plate (1), and a primer layer (22) is further formed on the opaque thin layer (21). Are formed. The gasket is formed in the portion indicated by the alternate long and short dash line (23), and the separator is formed in the portion indicated by the alternate long and short dash line (24). The primer layer can be formed not only on the thin layer (21) but also on the side of the glass plate on which the gasket is further formed or on the upper surface of the figure. Thin layer (2
1) may be a coating film of organic or inorganic paint,
In some cases, it may be a layer formed by adhering an organic polymer tape or sheet or a layer formed by adhering an inorganic tape or sheet such as a metal foil. In addition, as described in JP-A-57-158481 related to the inventions of the present inventors, a peelable protective film is formed to protect the surface of a glass plate on which a gasket or a separator is not formed. You can also leave it.

As the mold, various molds as described in the above-mentioned publication can be used. If necessary, it is preferable to dispose a sealing material made of an elastic material or the like at a predetermined portion so that the injected material does not leak from the cavity (see the above-mentioned publication). The molding die may be a molding die in which all parts of the glass plate can be arranged inside, or may be a molding mold in which the glass plate part where the gasket or the like is not formed is exposed from the molding die. The latter includes, for example, a frame-shaped molding die in which the central portion of the glass plate is exposed.

In the present invention, the material of the gasket and the separator injected into the cavity or the raw material of the material is a synthetic resin or a synthetic resin raw material which can be solidified.

The solidifiable synthetic resin or synthetic resin raw material means that it can be changed from a fluid state to a non-fluid state, and in the case of a synthetic resin raw material, it means a synthetic resin when it is made non-fluid state. . In the case of a thermoplastic resin, it becomes a fluid state by heating and melting, and becomes a non-fluid state by cooling. The thermosetting resin is liquid to solid in the uncured state, and the solid one is in a fluid state by heating or the like, and is in a non-fluid state by so-called curing or crosslinking reaction. In addition, there is also one in which two or more components are mixed with a solid synthetic resin raw material which can be in a liquid state to a fluid state and reacted to form a non-fluid state synthetic resin. The solidification in the present invention means
These are changes in the state in which the synthetic resin and its raw material injected into the cavity in the fluidized state become the non-fluidized state in the cavity.

According to the method of forming a synthetic resin, in the present invention, an injection molding method, a transfer molding method, a RIM method, and L
A method such as IM method may be used. Particularly, considering the compressive stress on the glass plate, the RIM method and the LIM method which can inject the synthetic resin and the raw material thereof at a relatively low pressure are preferable. In the RIM method and the LIM method, a method of molding using a synthetic resin containing a reinforcing material or a raw material thereof may be particularly called an R-RIM method or an R-LIM method. RIM
The method and R-LIM method can also be used. Hereinafter, these are regarded as a kind of RIM method or LIM method.

RIM (Reaction Injection Molding) and LIM (Liquid Inj)
Although the distinction of ection molding is not clear, the former is a method of injecting by mixing two or more components by collision at a relatively high pressure, and the latter is an injection by mixing two or more components at a pressure of less than that. The method of doing. Although injection is performed at a relatively high pressure in the RIM method, the pressure after injection into the mold is about 3 kg / cm ² or less, which is far lower than the pressure normally used in the injection molding method. These molding methods use a synthetic raw material composed of two or more components. For example, they may be a combination of reactive raw materials such as a polyol and an isocyanate compound, or may be a combination of a polymerizable raw material and its polymerization catalyst such as caprolactam and a catalyst. These liquids may be in the form of slurries containing solids such as fillers. This synthetic resin raw material is a filler, a reinforcing material, a coloring agent, a foaming agent,
A catalyst, a stabilizer, and various other additives may be added and used. It is also possible to fill the cavity space with a reinforcing material in advance. This method may be a kind of LIM method conventionally called a resin injection molding method.

The synthetic resin obtained by the RIM method or LIM method,
Polyurethane resin, epoxy resin, polyester resin,
Vinyl ester resin, silicone resin, nylon-6, etc. are available. Particularly preferred is a polyurethane resin,
This is mainly obtained by the RIM method from at least two raw materials of a component containing a polyol as a main component and a component containing a polyisocyanate compound as a main component. In this case, it is preferable that the mold, particularly the mold portion in contact with the cavity space, is heated to room temperature to 100 ° C, particularly 40 to 70 ° C. In the case of molding another thermoplastic resin, it is preferable that the temperature is 150 ° C. or lower, particularly 50 to 150 ° C., and that of the thermosetting resin is 250 ° C. or lower, particularly 130 to 200 ° C. In the RIM method and LIM method, solidification occurs due to the increase in the molecular weight due to the reaction of the synthetic resin raw material, and the obtained synthetic resin contains the so-called thermosetting resin and thermoplastic resin as described above.

Injection molding is used for molding thermoplastic resins and thermosetting resins, and transfer molding is mainly used for molding thermosetting resins. In these molding methods, a relatively high pressure is used for injecting the synthetic resin, so that it is preferable to sufficiently seal the contact portion between the glass plate surface and the molding die by the sealing material. In addition to this, it is preferable to provide a protective coating on the contact surface of the glass plate with the molding die, and it is preferable to perform molding with high precision using a die having high dimensional accuracy and plate glass. The temperature control of the mold varies depending on the type of synthetic resin, but generally a mold heated from room temperature to heated is used.

In cases other than the RIM method and the LIM method, the thermoplastic resin is heated and melted, poured into the cavity space, and cooled and solidified in the space. The thermoplastic resin causes a curing reaction in the cavity space and solidifies. Various additives may be added to these synthetic resins as in the case of the synthetic resin raw material. In particular, thermosetting resins are often used as molding materials to which relatively large amounts of fillers and reinforcing materials are added. For example, there is a molding material containing a filler called BMC and a reinforcing material such as glass fiber. The type of these synthetic resins is not particularly limited, and an elastomer or a thermoplastic rubber having rubber elasticity can also be used.

Preferred materials in the present invention are the polyurethane resin obtained by the RIM method and the vinyl chloride resin obtained by the injection molding method. The former is polyether polyol, polyether polyamine, polymer polyol, other high molecular weight active hydrogen compounds, ethylene glycol, 1,4-
It is obtained by reacting butanediol, monochlorodiaminobenzene, diethyltolylenediamine, other low molecular weight active hydrogen compounds, liquid modified diphenylmethane diisocyanate, and other polyisocyanate compounds. The latter is a resin obtained by blending a vinyl chloride homopolymer or copolymer, or a resin obtained by blending them with another thermoplastic resin, optionally with a stabilizer or a plasticizer. Generally, the curing of a polyurethane resin can be changed by changing the kind of raw material or the composition ratio of raw materials (particularly, the ratio of high molecular weight active hydrogen compound to low molecular weight active hydrogen compound). The hardness of the vinyl chloride resin can be changed by changing the type of the copolymerization monomer and its copolymerization ratio, the type and ratio of the blended resin, the ratio of the plasticizer, and the like. Therefore, it is easy to make the materials of the gasket and the separator different in hardness. Further, generally, the polyurethane resin is easier to be softer than the vinyl chloride resin.
Therefore, if the gasket material is a vinyl chloride resin and the separator material is a polyurethane resin, and the hardness of the two is different, a window glass member having excellent physical properties can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a window glass member obtained by the present invention, and FIG. 2 is a sectional view showing a partial cross section when it is attached to a window frame. FIG. 3 is a plan view schematically showing another example of the window glass member according to the present invention,
FIG. 4 is a partial cross-sectional view of a molding die used in the method for manufacturing a window glass member of the present invention. FIG. 5 is a partial sectional view showing an end portion of the window glass member. 1 ... Glass plate, 2 ... Gasket, 5 ... Separator, 14 ...
… Gasket forming cavity, 15 …… Separator forming cavity

Claims (5)

[Claims] 1. A method of manufacturing a window glass member comprising a glass plate having a gasket provided in the peripheral portion of the glass plate and a separator provided on one surface of the glass plate with a predetermined gap from the gasket, A glass plate is placed in a molding die to form a gasket forming cavity separating material forming cavity between the glass plate and the molding die inner surface, and a gasket material or a raw material of the material is injected into the gasket forming cavity. To form a gasket, and form a separator by injecting a separator material or a raw material of the material different from the gasket material into the cavity from a position different from the injection position of the gasket material or the raw material of the material. Then, the glass plate on which the gasket and the separator are formed is taken out from the molding die. 2. The method according to claim 1, wherein the gasket and the separator are made of synthetic resin having different hardness. 3. The method according to claim 2, wherein the synthetic resin is a polyurethane elastomer obtained by the RIM method. 4. The synthetic resin is a polyvinyl chloride resin.
The method of claim 2. 5. The gasket and the separator are made of a combination of polyvinyl chloride resin and polyurethane elastomer.
The method of claim 2.