JPH02151522A - Window having synthetic resin frame and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture a window causing no damage to its interlayer by forming a rigid resin frame having expanded foam part on its inside integrally with the peripheral part of a window plate consisting of a laminated glass having an interlayer so that the resin frame holds the peripheral part from both front and rear faces and the resin frame is fusion-welded to the interlayer. CONSTITUTION:A window plate 2 for vehicle consists of a laminated glass having a transparent interlayer 4 made of thermoplastic synthetic resin with adhesive property between a front face plate 2a and a rear face plate 2b made up of transparent glass, etc. A synthetic resin frame 3 having expanded foam part 5 on its inside is formed integrally with the peripheral part of the window plate 2 so as to cover the peripheral part, and the synthetic resin frame 3 consists of a frame body 3a covering a gap between a car body panel and the window plate 2, and holding parts 3b, 3c extending from the frame body so as to hold the peripheral part of the window plate 2. A U-shaped cross-sectional sticking layer 7 provided on a junction between the synthetic resin frame 3 and the window plate 2 is fusion-welded to the interlayer 4 on a fusion-welding part 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle window, and particularly to a window having a synthetic resin frame integrally formed to cover the peripheral edge of a window plate, and a method for manufacturing the same. .

[Conventional technology]

FIG. 1 is a front view of a vehicle window (front window). In the figure, 1 is a window, and a synthetic resin frame 3 is integrally molded to cover the peripheral edge of a window plate 2.

Conventionally, as a window 1 in which a frame 3 is integrally molded on a window plate 2 as described above, the peripheral edge of the window plate 2 is inserted into an injection mold, and the frame 3 is formed by injection molding.
is known (for example, JP-A-58-1
No. 13480, Utility Model Application No. 118724, No. 62-118, No. 63-
However, such a manufacturing method using injection molding has a problem in that the window plate 2 is easily damaged due to the high injection pressure of the resin.

Another method is to use a long intermediate frame material with a constant cross-sectional shape in an unfoamed or intermediately foamed state made of a thermoplastic synthetic resin with a large dielectric loss that contains a foaming agent that foams when heated. 'l! A window is known in which the frame 3 is formed by fixing the J edge and placing it in the cavity of a mold and heating it to foam and expand within the mold (for example, Japanese Patent Laid-Open No. 62 -251229
No. 62-257831).

However, when the above method is applied to a laminated glass having an interlayer film made of a thermoplastic resin, there is a problem that the interlayer film is easily damaged and the sealing performance is deteriorated.

[Problem to be solved by the invention]

In order to solve the above-mentioned problems, an object of the present invention is to provide a window having a synthetic resin frame which can be manufactured by simple operations without damaging the window plate and the interlayer film, and which has excellent breakage resistance and sealing properties. The key is to figure out the manufacturing method.

[Means to solve the problem]

The present invention is a window having the following synthetic resin frame and its manufacturing method.

(1) A window plate made of laminated glass with an interlayer film made of transparent thermoplastic synthetic resin having adhesive properties, which is integrally molded so as to sandwich the periphery of this window plate from both the front and back sides, and has a foamed part inside. 1. A window having a synthetic resin frame, characterized in that the window has a synthetic resin frame and is fused to the intermediate film.

(2) The window according to (1) above, wherein the synthetic resin frame has an adhesive layer that blocks plasticizer at the joint portion with the window plate.

(3) A window plate made of laminated glass with an interlayer film made of transparent thermoplastic synthetic resin that has adhesive properties, and a foam layer inside that is integrally molded so as to sandwich the periphery of this window plate from both the front and back sides. In the method of manufacturing a window having a synthetic resin frame having a synthetic resin frame having a constant cross-sectional shape, the frame is made of a thermoplastic synthetic resin with a large dielectric loss and contains a foaming agent that foams when heated, and is made of a synthetic resin frame that is in an unfoamed or intermediately foamed state. a process of obtaining a long intermediate frame material; a process of temporarily fixing the intermediate frame material to the outer periphery of a window plate made of laminated glass with a heat-activated adhesive layer interposed; a material with low dielectric loss; a step of placing and fixing the window plate on a mold consisting of; applying a high frequency voltage to the frame forming part of the mold to cause the intermediate frame material to self-heat and expand by vaporizing the foaming agent; A method for manufacturing a window having a synthetic resin frame, the method comprising the step of fusing the window with a membrane.

(4) At the joint part of the intermediate frame material with the window plate,
The method according to (3) above, characterized in that a fixed layer having a smaller dielectric loss than the main body portion of the intermediate frame material is formed to block heat from the main body portion when a high frequency voltage is applied.

Either of the step of temporarily fixing the intermediate frame material and the step of mounting and fixing the window plate on the mold may be performed first.

In the present invention, windows include all vehicle windows such as front windows, back windows, side windows, and sunroofs. Further, the synthetic resin frame can be formed on any peripheral edge such as the entire circumference or a part of the window plate.

[For production]

In the window having a synthetic resin frame of the present invention, the peripheral edge of the window plate is held between the front and back sides by the synthetic resin frame having a foamed part inside, so that when it is installed on the vehicle body, the window plate is covered with Shock is dispersed and breakage resistance is increased.

Furthermore, since the interlayer film of the laminated glass is fused to the synthetic resin frame, tI scratches such as peeling are eliminated, sealing performance is improved, and water can be blocked from penetrating along the window plate. Forming an adhesive layer on the synthetic resin frame to block the plasticizer prevents damage to the interlayer film due to penetration of the plasticizer.

In the window manufacturing method of the present invention, an intermediate frame material having a constant cross-sectional shape that substantially corresponds to an unfoamed or intermediately foamed synthetic resin frame is formed from a synthetic resin that is fused to an intermediate film; Temporarily adhere to the outer periphery of a window plate made of laminated glass with a heat-activated adhesive layer interposed, the window plate is placed and fixed on a mold, and a high frequency voltage is applied to the frame molding part of the mold. The foamed portion of the intermediate frame material self-generates heat and expands by vaporizing the foaming agent, and is fused to the intermediate film of the window plate to manufacture a window.

In this manufacturing method, the pressure caused by foaming is small, so the window plate is not damaged, and the synthetic resin frame formed by foaming is fused to the interlayer film, so the interlayer film is not damaged. When a fixed layer having a lower dielectric loss than the foamed portion of the intermediate frame material is formed at the joint portion of the intermediate frame material with the window plate, heat transfer from the foamed portion is blocked, and the effect of preventing damage to the intermediate film is increased.

〔Example〕

Examples of the present invention will be described below.

FIG. 2 shows a first window showing a window according to one embodiment of the invention.
It is an AA sectional view of the figure. The window 1 is integrally formed with a synthetic resin frame 3 so as to cover the peripheral edge of a window plate 2. The window plate 2 is made of laminated glass having an intermediate film 4 made of a transparent thermoplastic synthetic resin having adhesive properties such as polyvinyl butyral resin between a front plate 2a and a back plate 2b made of transparent glass or synthetic resin.

The synthetic resin frame 3 includes a clamping part 3b extending from a frame main body 3a that covers the gap between the vehicle body panel and the window plate 2 so as to clamp the peripheral edge of the window plate 2 from both the front and back sides;
The inside of the frame main body 3a and the clamping parts 3b, 3c of the synthetic resin frame 3 having a diameter of 3c is made of a foamed part 5 having a large number of bubbles, and is made of a synthetic resin containing a plasticizer, which is soft and has a large dielectric loss, such as DOP ( It is preferably made of a foamed product such as a soft polyvinyl chloride resin containing a plasticizer such as dioctyl phthalate, neoprene rubber, or nitrile rubber.

A non-foamed layer 6 having a uniform surface is integrally formed on the outer surface side of the frame body 3a and the holding portion 3b of the synthetic resin frame 3. Also, the frame body 3a of the frame 3 and the clamping parts 3b, 3
The joint part c with the window plate 2 is made of a hard or semi-hard synthetic resin that contains little or no plasticizer and has a lower dielectric loss than the resin of the foamed part 5, such as hard polyvinyl chloride resin, ABS resin, etc. A fixing layer 7 consisting of is integrally formed and fixed to the window plate 2 via an adhesive layer. The intermediate film 4 of the window plate 2 and the fixing layer 7 of the synthetic resin frame 3 are fused at a fused portion 8. Reference numeral 9 denotes an opaque print layer formed on the inner surface side of the peripheral edge of the window plate 2.

The above window 1 is similar to the conventional one, with a synthetic resin frame 3 covering the gap between it and the vehicle body panel.

It is used by being attached to the car body panel.

In window 1 above, window plate 2
The peripheral edge of the frame 3 is sandwiched from both front and back sides by a synthetic resin frame 3 which has a foamed part 5 continuous in the longitudinal direction, so when it is attached to a vehicle body panel, the frame 3 does not expand or contract under high or low temperatures. However, even if the window plate 2
The impact applied to the material is dispersed, increasing breakage resistance.

In addition, since the interlayer film 4 of the window plate 2 made of laminated glass is fused to the synthetic resin frame 3 at the fused portion 8, damage such as peeling is eliminated, and the sealing performance is improved, allowing penetration along the window plate 2. Water can be cut off.

The surface of the synthetic resin frame 3 tends to become rough when the foamed portion 5 formed inside is exposed, but if the non-foamed layer 6 is formed on the outer surface side, a uniform surface can be formed and an excellent appearance can be obtained.

Furthermore, by forming the adhesive layer 7 at the joint with the window plate, it is possible to prevent the plasticizer from penetrating from the foamed part 5 and damage the intermediate film 4 and the adhesive layer, and also
, 3C clamping force can be made uniform.

Fig. 3 is a perspective view of the intermediate frame material, Fig. 4 is a front view showing the manufacturing process, Fig. 5 is a plan view of the mold, Fig. 6 is its BB sectional view, and Fig. 7 is a part of it. It is an enlarged view of. In the method for manufacturing the window 1 described above, first, as shown in FIG. 3, an intermediate frame member 11 having a similar cross-sectional shape to that of the synthetic resin frame 3, which is approximately the same or slightly smaller, is formed. The intermediate frame member 11 includes a main body portion 11a and clamping portions 11b and 11c corresponding to the frame main body 3a and clamping portions 3b and 3c of the synthetic resin frame 3. Then, a foaming agent that foams when heated is mixed into a thermoplastic resin with a large dielectric loss such as a soft vinyl chloride resin, and one foaming agent is kept in an unfoamed or intermediate foamed state, and the cross-sectional shape corresponds to the foamed portion 5. A foamed part 5a formed in a certain elongated shape, a non-foamed layer 6a made of the same kind of resin that does not contain a foaming agent and laminated on the outer surface side corresponding to the non-foamed part 6, and a fixed layer 7 corresponding to the foamed part 5a. A fixing layer 7a formed in the window plate joint portion is formed by multilayer extrusion molding, and is made of the same type of resin that contains less or no plasticizer and has a lower dielectric loss than the resin of the foamed portion 5a.

Although it is preferable that the non-foamed layer 6a and the fixed layer 7a are formed integrally in this step, they may be formed separately. When these are integrally molded, it is preferable to use the same type of synthetic resin that is mutually compatible with the main body part 5a. For example, the main body part 5a is made of soft polyvinyl chloride resin (without plasticizer DOP and foaming agent). (including), it is preferable to combine the non-foamed layer 6a with a non-foamed semi-rigid or soft polyvinyl chloride resin and the barrier layer 7a with a semi-rigid or hard polyvinyl chloride resin.

Groove 1 corresponding to window plate 2 of intermediate frame material 11
2 is formed to have the same thickness as or slightly larger than the thickness of the window plate 2, and a notch 1 is formed in a part of the innermost corner of the groove 12.
3 to facilitate insertion of the window plate 2.

On the inner surface of the groove 12 of the intermediate frame material 11 is a heat-activated adhesive that is activated by heating to bond the intermediate frame material 11 and the window plate 2 together in synchronization with extrusion molding of the intermediate frame material 11 or after extrusion molding. It is preferable to form a layer,
Alternatively, the adhesive layer may be formed on the window plate 2 side, or may be used in combination. Preferred adhesives include, for example, liquid-type adhesives in which a phenol resin component is added as a hardening agent to a main ingredient consisting of an acrylic resin as a solid component.

Next, as shown in FIG. 4, the intermediate frame member 11 is temporarily fixed mechanically to the outer peripheral edge of the window plate 2, and then placed and fixed on the mold 20 as shown in FIGS. 5 to 7. For temporary fixing, if the radius of curvature of a part of the corner of the window plate 2 is large, that is, if the intermediate frame material 11 does not deform or curl up when bent to the same curvature, the intermediate frame material 11 may be continuously fixed. Alternatively, if the radius of curvature is small, as shown in FIG. 4, a notch 15 is formed in advance at the corner corresponding to the intermediate frame member 11 to make it easier to bend. is preferable.

In addition, as a temporary fixing method, the intermediate frame material 11 is cut to a predetermined length corresponding to the side part and a part of the upper.
It is also possible to fix the ends of adjacent intermediate frame members 11 so as to abut each other.

The mold 20 has a planar shape along the outer periphery of the window plate 2, and has an upper electrode 2 connected to the upper electrode plate 21.
2, and a lower mold body 26 having a lower electrode 25 connected to the lower electrode/plate 24, and is continuous to a parting 27 formed by the upper mold body 23 and the lower mold body 26. A cavity 28 is formed.

The upper mold body 23 and the lower mold body 26 are made of a material with low dielectric loss.For example, resin molds made of silicone resin, polyolefin resin, etc. are common, but ceramic materials may also be used. You can also do it. Up,
The lower electrodes 22° 25 are provided corresponding to the portion forming the frame 3 on the window plate 2, and their horizontal width is slightly larger than the horizontal width of the cavity 28.
Moreover, it is arranged so as to maintain a substantially equal distance from the cavity 28. The cavity 28 has a shape corresponding to the synthetic resin frame 3.

Place the intermediate frame material 11 temporarily fixed to the window plate 2 in the cavity 28 of such a mold 20,
Clamp and fix the mold.

When a high frequency voltage is applied between the upper and lower electrodes 22 and 25 in this state, the foamed portion 5a of the intermediate frame member 11 self-heats because it is molded from a material with large dielectric loss. With this heat generation, the foaming agent mixed inside vaporizes and expands, thereby expanding the foamed portion 5a of the intermediate frame member 11. When a soft vinyl chloride resin containing a plasticizer is used as the foaming portion 5a, it has a high dielectric loss, so it is heated quickly and foaming occurs. On the other hand, since the non-foamed layer 6a and the fixed layer 7a have smaller dielectric loss than the resin of the foamed portion 5a, heating is delayed.

Therefore, heat transfer from the high temperature state in the foam layer 5a to the intermediate film 4 is blocked, and damage to the intermediate film 4 is prevented. Intermediate film 4
The adhesive layer 7a is made of polyvinyl butyral resin or the like.
Since the dielectric loss is approximately the same or slightly smaller than that of the intermediate frame material 11, self-heating is smaller than that of the intermediate frame material 11. be fused together. At this time, it is preferable that the intermediate film 4 is made to protrude from the end of the window plate 2 so that the fused portion 8 becomes large. In this way, the entire intermediate frame member 11 expands and sticks to the inner surface of the cavity 28. At this time, the intermediate frame material 11 is softened and melted, and thereby the adhesive layer is also heated and activated, firmly adhering the window plate 2 and the intermediate frame material 11 to the synthetic resin frame 3.
form.

On the other hand, since the mold 20 is made of a material with low dielectric loss, self-heating is unlikely to occur, and the mold 20 will not soften or deform the cavity 28. In addition, since only the expansion force due to foaming of the foamed portion 5a acts on the window plate 2, and high pressure as in normal injection molding does not act on the window plate 2, damage to the window plate 2 does not occur.

Stop applying the high frequency voltage, wait for the frame 3 to cool and solidify, open the mold, take out the window 1, and
Completed manufacturing.

In this manufacturing method, since the pressure caused by foaming is small, the window plate 2 is not damaged. Further, since the synthetic resin frame 3 formed by foaming is fused to the intermediate film 4, the intermediate film 4 is not damaged.

Then, by forming a fixed part 7a having a smaller dielectric loss than the foamed part 5a of the intermediate frame material 11 at the joint part of the intermediate frame material 11 with the window plate 2, heat transfer from the foamed part 5a is suppressed and damage to the intermediate film 4 is achieved. In addition to preventing this, it is possible to perform fusion bonding with the intermediate film 4 at an appropriate temperature.

When molding the synthetic resin frame 3 using an up-and-down mold, it is preferable to position the window plate 2 so that the outer surface side is on the lower side. This makes it easy to position the window plate 2, improving work efficiency, and since the air bubbles generated in the foamed part 5a move upward due to the application of high frequency voltage, it is possible to prevent air bubbles from being located on the outer surface side.
A clean outer surface is obtained.

In the above embodiment, the intermediate frame material is temporarily fixed to the outer peripheral edge of the window plate and then placed and fixed on the mold, but depending on the shape of the window plate and the intermediate frame material, the window plate may be placed on the mold. It is also possible to temporarily fix the intermediate frame material by pushing it in after it is placed.

〔Effect of the invention〕

According to the window of the present invention, the peripheral edge of the window plate made of laminated glass is sandwiched between the synthetic resin frame having a foamed part and fused to the intermediate frame, so the synthetic resin has excellent breakage resistance and sealing properties. A window is obtained consisting of laminated glass with a frame.

Furthermore, by providing an adhesive layer that blocks plasticizer, damage to the interlayer film is prevented, and excellent appearance, breakage resistance, and sealability are maintained.

According to the manufacturing method of the present invention, an intermediate frame material having a constant cross-sectional shape that substantially corresponds to an unfoamed or intermediately foamed synthetic resin frame is inserted into a mold, heated and foamed to form a frame, and an intermediate film and Because it is fused, the high injection pressure required in normal injection molding is not required, and the window plate is not exposed to high temperatures and pressures, eliminating damage to the window plate and the interlayer film. Since the mold does not need to withstand high pressure, it can be simple.

Also, if a fixed part with low dielectric loss is formed on the intermediate frame material,
Heat transfer from the foamed portion is blocked, further increasing the effect of preventing damage to the interlayer film.

[Brief explanation of the drawing]

FIG. 1 is a front view of the window, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1 showing a window according to an embodiment of the present invention, and FIG.
The figure is a perspective view of the intermediate frame material, Figure 4 is a front view showing the manufacturing process, Figure 5 is a plan view of the mold, Figure 6 is its BB sectional view, and Figure 7 is a partially enlarged view. It is a diagram. In each figure, the same reference numerals indicate the same or corresponding parts, 1 is a window, 2 is a window plate, 3 is a synthetic resin frame,
4 is an intermediate film, 5, 5a is a foamed part, 6.6a is a non-foamed layer,
7.7a is a fixed layer, 8 is a fusion part, 11 is an intermediate frame material, 20
22 is an upper electrode, 23 is an upper mold body, 25 is a lower electrode, 26 is a lower mold body, and 28 is a cavity. Agent: Patent Attorney Sei Yanagihara In Figure 4, Figure 7, Procedural Amendment 7, page 13, line 4 of the detailed description of the amendment, ``blocking layer'' is corrected to ``fixed layer.'' In the drawings, Figures 5 and 6 will be corrected to show the incident as shown in the attached sheet. Patent Application No. 303631 of 1988 2. Name of the invention: Window with synthetic resin frame and its manufacturing method 3. Relationship with the amended person's case.

Claims (4)

[Claims] (1) A window plate made of laminated glass with an interlayer film made of transparent thermoplastic synthetic resin having adhesive properties, which is integrally molded so as to sandwich the periphery of this window plate from both the front and back sides, and has a foamed part inside. 1. A window having a synthetic resin frame, characterized in that the window has a synthetic resin frame and is fused to the intermediate film. (2) The window according to claim (1), characterized in that the synthetic resin frame has an adhesive layer that blocks plasticizer at a joint portion with the window plate. (3) A window plate made of laminated glass with an interlayer film made of transparent thermoplastic synthetic resin that has adhesive properties, and a foam layer inside that is integrally molded so as to sandwich the periphery of this window plate from both the front and back sides. In the method of manufacturing a window having a synthetic resin frame having a synthetic resin frame having a constant cross-sectional shape, the frame is made of a thermoplastic synthetic resin with a large dielectric loss and contains a foaming agent that foams when heated, and is made of a synthetic resin frame that is in an unfoamed or intermediately foamed state. a process of obtaining a long intermediate frame material; a process of temporarily fixing the intermediate frame material to the outer periphery of a window plate made of laminated glass with a heat-activated adhesive layer interposed; a material with low dielectric loss; a step of placing and fixing the window plate on a mold consisting of; applying a high frequency voltage to the frame forming part of the mold to cause the intermediate frame material to self-heat and expand by vaporizing the foaming agent; A method for manufacturing a window having a synthetic resin frame, the method comprising the step of fusing the window with a membrane. (4) At the joint part of the intermediate frame material with the window plate,
4. The method according to claim 3, wherein a fixed layer having a smaller dielectric loss than the main body of the intermediate frame material is formed to block heat from the main body when a high frequency voltage is applied.