JPH01314120A - Manufacture of window glass with gasket - Google Patents

Abstract

PURPOSE:To prevent generation of a sink in the outside of a gasket, by a method wherein a part of an insert member is held by inserting into a groove or a hole formed into the inside of a molding tool and injection molding is performed by extending the other part of the insert member into a cavity space. CONSTITUTION:Window glass 14 is arranged on a fixed position on a bottom force 12. One fringe part 17a of an insert member 17 is held by inserting the same into a groove 12b of the bottom force 12. The other fringe part 17b of the insert member 17 becomes a state where it is extended into a cavity space 15. A top force 13 is put over the bottom force 12 under this state and the window glass 14 is held between the bottom and top forces 12, 13. Mold clamping is performed and a gasket forming material is injected into a cavity space 15 after that. In this instance, since the fringe part 17a of the insert member is held by inserting into a groove 12b of the bottom force 12, it does not happen that positional deviation is generated. After injection, the gasket forming material is solidified through cooling or cured through reaction, the bottom force 12 and top force 13 are broken and the window glass with a gasket is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for manufacturing a window glass with a gasket, which is applied to, for example, automobile window glass or architectural window glass.

[Prior art] It is impossible to attach rubber or synthetic resin gaskets or moldings (hereinafter collectively referred to as gaskets) to the periphery of vehicle window glass such as automobiles or architectural window glass for the purpose of decoration or sealing. As is commonly done, for example, as shown in FIGS. 3 and 4, a gasket 2 is attached to the peripheral edge of a window glass 1.

Conventionally, to attach this gasket to the window glass l\, a method has been generally adopted in which a gasket formed by extrusion molding or the like is adhered to or fitted into the periphery of the window glass. However, with this method, the linearly formed gasket is bent to match the peripheral shape of the window glass before installation, which makes installation difficult when the window glass has a complex shape, and requires additional labor, resulting in poor work efficiency. There were problems such as:

To solve this problem, the window glass is placed in a mold, and a gasket-forming material, such as a melt of rubber or elastomer or a raw material mixture capable of forming the rubber or elastomer, is injected into the mold. A method of manufacturing a gasketed window glass has been proposed, which consists of forming a gasket around the window glass and removing it from the mold (for example, Japanese Patent Laid-Open Nos. 57-158481 and 1983).
-73681, JP 58-110786, JP 60-4015, JP 60-104412, JP 60-63115, JP 61-79613, JP 61-66645 (Refer to the publication number, etc.)

To explain this method in more detail, Figure 5 (a
As shown in t, the window glass 1 is placed in a mold 5 consisting of a lower mold 3 and an upper mold 4, and as shown in FIG. A cavity space 6 is formed at the peripheral edge of the window glass 1 by sandwiching the window glass 1. and,
A gasket forming material such as a melt of rubber or elastomer or a raw material mixture capable of forming rubber or elastomer is injected into this cavity space 6 from a gate 7. The gasket 2 is formed by solidifying this gasket forming material in the cavity space 6. Then, as shown in FIG. 5(C), the lower mold 3 and the upper mold 4 are opened, and the window glass 1 provided with the gasket 2 is taken out from the mold 5.

However, such an injection molding method has a problem in that sink marks and the like are likely to occur on the outer surface of the gasket in thick parts and in complicatedly shaped parts including ribs, bosses, and the like. In order to prevent this, it is possible to increase the molding pressure, but since the molding is done while the glass is sandwiched,
Molding pressure was also limited.

On the other hand, Japanese Patent Laid-Open No. 61-283515 discloses a method of injection molding a reinforcing material placed in a cavity space at the peripheral edge of a window glass. However, because this method uses asbestos, ceramic fibers, glass fibers, carbon fibers, metal fibers, school mats, etc. as reinforcing materials, it cannot be expected to be sufficiently effective in preventing the occurrence of sink marks. .

Further, there is a problem in that the arrangement of the fibrous reinforcing material increases the resistance to the flow of the gasket forming material during injection.

Furthermore, Japanese Patent Laid-Open No. 58-73681 discloses a method in which a reinforcing member is attached to the peripheral edge of a window glass, this reinforcing member is placed in a cavity space and injection molded, and the reinforcing member is buried in a gasket. There is. However, with this method, since the reinforcing member is attached directly to the window glass, there is a problem that the reinforcing member inhibits the flexibility of the gasket relative to the window glass, resulting in poor adaptability to the window frame to which it is attached. .

"Problems to be Solved by the Invention" The present invention has been made in view of the problems of the prior art as described above, and its purpose is to create a gasket by injection molding a gasket-forming material on the peripheral edge of a window glass. An object of the present invention is to provide a method for manufacturing a window glass with a gasket, which prevents the occurrence of sink marks on the outer surface of the gasket.

"Means for Solving the Problems" In order to achieve the above object, the present invention arranges a window glass in a mold, and creates a gasket molding cavity space between the peripheral edge of the window glass and the inner surface of the mold. A method for producing a gasketed window glass in which a gasket-forming material is injected into the cavity space and solidified, in which a groove or hole is formed on the inner surface of the mold forming the cavity space, and a part of the gasket-forming material is formed into the groove or hole. The present invention is characterized in that an insert member is inserted and held in the hole and the other part extends into the cavity space, and the injection is performed with the peripheral edge of the window glass and the insert member disposed in the cavity space.

In addition, it is preferable that the insert member is arranged along a slightly inner part of the gasket outer forming surface in the cavity space.

"Operation" By placing the insert member in the cavity space and injecting it, a gasket in which the insert member is partially embedded is formed. After the gasket is formed, when the mold is opened and the gasketed window glass is taken out, a portion of the insert member is extracted from the groove or hole of the mold. Therefore, the insert member has a shape in which a portion protrudes from the surface of the gasket and the other portion is buried inside the gasket. The portion protruding from the surface of the gasket may be left as is if it is hidden by the window frame when it is attached to the window frame, for example, or may be cut and removed if it is not.

In this manner, by providing the insert member, it is possible to effectively prevent sink marks from occurring on the outer surface of the gasket in its thick portions, and in its complicatedly shaped portions including lips, bosses, and the like. Further, the dimensional accuracy of the gasket is improved, and deformation (including plastic deformation) due to pressure by hands, fingers, etc. can be prevented. Furthermore, since the insert member is not directly fixed to the window glass, the flexibility of the gasket with respect to the window glass is maintained sufficiently, and the adaptability to the window frame is not impaired.

In a preferred embodiment of the present invention, when the insert member is arranged along a portion slightly inside the gasket outer forming surface in the cavity space, the generation of the sink marks and the like on the outer surface of the gasket can be more effectively prevented.

"Example" Hereinafter, a method for manufacturing a window glass with a gasket according to the present invention will be explained with reference to the drawings.

As shown in FIG. 1, a lower mold 12 and an upper mold 13 of a mold 11
A window glass 14 is held between the two. A sealing member 12a made of rubber, elastomer, etc. is provided on the contact surface between the peripheral edge of the window glass 14 and the lower mold 12 and upper mold 13.
, 13a are provided. Seal member 12a%13
The role of a is to prevent the gasket forming material from entering during injection to prevent the occurrence of flash, and also to relieve the stress applied to the window glass 14 during mold clamping to prevent damage to the window glass 14. A cavity space 15 is formed between the peripheral edge of the window glass 14 and the inner surfaces of the lower mold 12 and the upper mold 13. A gasket forming material 16 is injected into this cavity space 15, and the gasket forming material 16 is solidified so that the gasket is formed integrally with the window glass 14. It should be noted that the mold 11 can be made of various materials that are used in ordinary molds, and for example, metals such as iron, alloys, FRP, polymer concrete, concrete, etc. are preferably used.

In the present invention, an insert member 17 is arranged in the cavity space 15.

The insert member 17 has a bent cross-sectional shape as shown in the figure, and has a shape extending in the longitudinal direction of the cavity space 15 along the peripheral edge of the window glass 14. Also,
The insert member 17 may be annular so as to completely surround the periphery of the window glass 15, or may be formed in a straight or curved shape, and may be arranged appropriately at the required location. The linear portion 17a of the insert member 17 is inserted and held in a groove 12b formed on the inner surface of the lower mold 12 facing the cavity space 15. In this case, it is preferable that the depth direction of the groove 12b coincides with the direction of product removal so that one edge 17a of the insert member 17 can be extracted from the groove 12b after gasket molding. However, if the insert member 17 is flexible Alternatively, if the insert member 17 is made of an easily deformable material, the bottom edge 17b of the insert member 17 is not necessarily extended into the cavity space 15, and in the case of this embodiment, the design side of the gasket (attached to the window frame) The outer gasket forming surface 13b of the upper mold 13 forms the outer gasket forming surface 13b of the upper mold 13 (the part that becomes the outer side when the gasket is pressed).

Note that various materials can be used for the insert member 17, such as metals such as stainless steel, and resins of the same type or different type as the gasket forming material. however,
When the protruding portion of the insert member 17 is to be removed after the gasket is formed, a resin material is preferable.

Next, a method for manufacturing a gasketed window glass of the present invention using the mold 11 will be described.

The window glass 14 can be a single piece of normal glass, a laminated glass made by bonding two pieces of glass with an interlayer film such as polyvinyl butyral, or a sheet made of polyurethane resin, polyester resin, etc. laminated on one side of a single piece of glass or laminated glass. Various types of glass can be used, including double-layered glass, which is made by laminating two sheets of glass with a gap between them, sealing the surrounding area, and filling the gap with dry air or nitrogen gas. Also,
These glasses may be air tempered.

As the gasket forming material, a molten synthetic resin that is cooled and solidified in a mold, a fluid synthetic resin raw material mixture that reacts and solidifies in a mold, etc. are preferably used. Examples of the former include molten soft vinyl chloride resin, thermoplastic polyester elastomer, and styrene.
Examples of synthetic resins obtained from the latter raw material mixture include, but are not limited to, diene thermoplastic elastomers and ethylene-unsaturated carboxylic acid copolymers, such as polyurethane elastomers and polyurethane urea Examples include, but are not limited to, elastomers, polyurea elastomers, polyamide resins, epoxy resins, and unsaturated polyester resins.

When forming the gasket, it is preferable to apply a mold release agent to the inner surface of the cavity space 15 of the mold 11. Next, the window glass 14 is placed at a predetermined position on the lower mold 12.

Furthermore, one edge 17a of the insert member 17 is attached to the lower die 12.
It is inserted and held in the full 12b. The bottom edge 17b of the insert member 17 is extended into the cavity space 15. In this state, the upper mold 13 is placed over the lower mold 12, and the lower mold 12
A window glass 14 is held between the upper mold 13 and the upper mold 13.

After the window glass 14 is thus sandwiched between the lower mold 12 and the upper mold 13, the molds are clamped with appropriate pressure and the gasket forming material is injected into the cavity space 15. At this time, the insert member 17 has its -edge 17a inserted into the lower mold 1.
Since the gasket is inserted and held in the groove 12b of No. 2, it will not be misaligned due to injection pressure. After injection, the gasket forming material is cooled and solidified or hardened by reaction, and the lower mold 12 and upper mold 13 are opened to produce the gasket. Take out the window glass with gasket.

At this time, the straight line portion 17a of the insert member 17 is connected to the lower die 1.
It is pulled out from the groove 12b of No. 2.

In this embodiment, since the wall thickness on the design side of the gasket is thicker, appearance defects such as sink marks are likely to occur with conventional methods, but by arranging the insert member 17, the occurrence of sink marks etc. can be prevented. , a gasket with good appearance can be manufactured. Further, when molding a gasket having a shape having ribs, sink marks and the like are likely to occur on the designed side of the gasket located on the back side of the ribs, but the present invention is also effective in such cases.

FIG. 2 shows another example of the insert member used in the present invention.

The insert member 27 includes a plate portion 27b bent in a “he” shape when viewed from the end surface direction, and a plurality of bins 27 protruding downward at predetermined intervals along one side of the plate portion 27b.
It is composed of a. When using this insert member 27, a hole into which the bottle 27a can be inserted may be formed instead of the groove 12b of the lower mold 12 in FIG.
In this example, the portion that protrudes from the surface of the molded gasket becomes the bottle 27a, which has the advantage of making the work easier when cutting off the protruding portion after molding.

Effects of the Invention J As explained above, according to the present invention, a part of the insert member is inserted and held in the groove or hole formed on the inner surface of the mold, and the other part of the insert member is extended into the cavity space. Since the gasket is injection molded, it is possible to prevent sink marks from occurring on the outer surface of the thick part of the gasket, or in complicatedly shaped parts including ribs, bosses, etc.
Since the insert member is partially embedded, the dimensional accuracy of the gasket is improved and deformation (including plastic deformation) due to pressure by hands, fingers, etc. can be prevented. Note that the part of the insert member that protrudes from the gasket can be removed if necessary.Furthermore, since the insert member is not directly fixed to the window glass, the flexibility of the gasket relative to the window glass is maintained sufficiently, and it can be easily attached to the window frame. The adaptability of the system is not compromised.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view showing one embodiment of the method for manufacturing a window glass with a gasket according to the present invention, Fig. 2 is a perspective view showing another example of the insert member used in the present invention, and Fig. 3 is a window with a gasket. A perspective view showing an example of the glass, FIG. 4 is a sectional view of the window glass with a gasket, and FIG.
b) and (c) are explanatory diagrams showing an example of a conventional manufacturing method step by step. In the figure, 11 is a mold, 12 is a lower mold, 12a is a gasket outer forming surface, 12b is a groove, 13 is an upper mold, 14 is a window glass, 15 is a cavity space, 16 is a gasket forming material,
17 is an insert member, 17a is one edge, 17b is a bottom edge, 27 is an insert member, 27a is a bottle, and 27b is a plate. Figure 2 Figure 32 Game in the 4th round

Claims (2)

[Claims] (1) A window glass is placed in a mold, a cavity space for gasket molding is formed between the peripheral edge of the window glass and the inner surface of the mold, and a gasket forming material is injected into this cavity space and solidified. In the method for manufacturing a window glass with a gasket, a groove or hole is formed on the inner surface of the mold forming the cavity space, a part is inserted and held in the groove or hole, and the other part extends into the cavity space. A method for manufacturing a gasketed window glass, characterized in that an insert member is attached and injection is performed with the peripheral edge of the window glass and the insert member placed in the cavity space. (2) The method for manufacturing a gasketed window glass according to claim 1, wherein the insert member is arranged along a slightly inner side of the gasket outer forming surface in the cavity space.