JP2002103384A - Method for manufacturing plate material for window with resin frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a plate material for a window with a resin frame whose surface shape is presentable, at a low cost. SOLUTION: In this method for manufacturing a plate material for a window with a resin frame, the specified part of the resin frame 14 is pressed by a pressing member 16 arranged in a molding die 10 during a period from the start of injecting a synthetic resin material to the opening of the molding die 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a window plate with a resin frame, and more particularly, to a method for manufacturing a window plate with a resin frame by integrally molding the resin frame with a molding die.

[0002]

2. Description of the Related Art Conventionally, window openings of vehicles such as automobiles are provided with:
A glass plate with a frame (a window plate with a frame) is attached.

[0003] As a method for manufacturing a window material with a frame, there is the following method, also called an encapsulation method.
First, an adhesive is applied to the periphery in advance, and if necessary, a heated window plate is mounted in a mold. At this time, a cavity space is formed in the peripheral portion of the window plate. Next, a synthetic resin material is injected into the cavity space of the molding die, and a resin frame is integrally formed on the periphery of the window plate. Then, the window plate with the resin frame is taken out of the mold. The manufactured window plate material with a resin frame is easy to assemble into a window opening or the like of a vehicle, and can provide good watertightness and an excellent appearance.

[0004]

The heat shrinkage of the synthetic resin material generated in the cooling step after the resin injection is applied to the portion of the window frame material with the resin frame manufactured as described above where the thickness of the resin frame is large. In some cases, dents (so-called sink marks) may occur on the surface of the resin frame due to the like. In some cases, the thickness of the resin frame has to be increased for reasons such as vehicle design, but if such sink marks occur on the surface of the resin frame, the window plate with the resin frame is attached to the vehicle, etc. The appearance when doing so is impaired. Further, if an attempt is made to form a sink-recessing concave portion (thickening) in the resin frame using a slide core or the like in the mold, the structure of the mold becomes complicated. Furthermore, since the frame is small in the first place, it is often impossible to form the sink preventing recess using the slide core. Further, if it is attempted to prevent the sink from occurring on the surface of the resin frame by increasing the injection pressure of the synthetic resin material, the window plate may be damaged in the molding die. The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for manufacturing a window plate with a resin frame, which has a good surface shape of the resin frame and can be manufactured at low cost. It is in.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention holds a peripheral portion of a window plate material by a molding die so that an inner surface of the molding die and a peripheral portion of the window plate material are sandwiched. A cavity space was formed, and a synthetic resin material was injected into the cavity space, and after solidifying the synthetic resin material, the mold was opened, and a resin frame was integrally formed with the window plate. A method for manufacturing a window plate with a resin frame, which removes the window plate with a resin frame from the molding die, wherein a predetermined portion of the resin frame is formed between the start of injection of the synthetic resin material and the opening of the molding die. Is pressed by a pressing member arranged in the molding die, and a method for manufacturing a window plate with a resin frame is provided.

[0006] As the "window plate material" in the present specification, a transparent or translucent glass plate or a resin plate can be exemplified. A chromatic glass plate or a resin plate may be used as long as it has sufficient transparency. Examples of the glass plate include a single glass plate and a laminated glass. Further, the glass plate may be provided with a functional coating such as a strengthening treatment or a heat ray reflective film. Examples of the “synthetic resin material” include a thermoplastic resin. Examples of the thermoplastic resin include, but are not limited to, vinyl chloride resins and general thermoplastic resins selected from polyolefin-based, polyester-based, polystyrene-based, polyamide-based, and polyurethane-based elastomers. Examples of the “resin frame” include a gasket, a molding, a weather strip, a seal rubber, and the like formed around the window plate. The resin frame may be provided on the entire circumference of the window plate, or may be provided so as to be interrupted in the middle of the entire circumference, or may be provided on one side or several sides of the window plate. "Predetermined part of resin frame"
The term refers to a portion where sinks are likely to occur due to a large thickness of the resin frame and / or the vicinity thereof. For example, in order to prevent sinks from occurring on the surface of the portion that becomes the appearance of the resin frame when the window material with the resin frame is mounted on a vehicle or the like,
It refers to a predetermined location on the back surface of that portion. In order to prevent the occurrence of sink marks at a predetermined portion of the surface of the portion that becomes the appearance of the resin frame, it is sufficient to press the back of the predetermined portion of the surface, but the back is pressed due to the design of the mold. It may not be possible. In this case, it is sufficient to press the vicinity of the back.
Further, a portion deviating from the vicinity of the back may be pressed as long as the sink at a predetermined portion on the surface can be prevented. The predetermined portion of the resin frame may be a part of the resin frame or the entire circumference. Further, they may be arranged at locations spaced apart over the entire circumference.

According to such a method of manufacturing a window plate with a resin frame, the internal pressure of the resin frame can be increased without increasing the injection pressure of the synthetic resin material. Therefore, sinks do not occur even in a portion where the thickness of the resin frame is large, and a window material with a resin frame having a good appearance when mounted on a vehicle or the like can be manufactured with high productivity.

In the method of manufacturing a window plate material with a resin frame according to the present invention, the resin frame is pressed by the pressing member in the pressure-holding / cooling step of the injection molding step so that the internal pressure of the resin frame becomes 2 to 25 MPa. Preferably, it is pressed. In this way, it is possible to obtain a window plate material with a resin frame having a very good appearance without sink marks with high productivity.

The injection molding step includes an injection step, a pressure-holding step, and a cooling step. The pressure-holding step is to prevent the volumetric shrinkage that occurs when the synthetic resin material in the cavity space is filled with the synthetic resin material in the injection process and then cooled and solidified. This is the stage in which a secondary injection pressure (holding pressure) is applied. The cooling step refers to a step of further cooling the synthetic resin material in the cavity space and solidifying it to such an extent that it can be taken out of the mold.

As a driving source for driving the pressing member, an air cylinder or the like can be exemplified. Further, the pressing member may be driven via a power transmission mechanism such as a rack and pinion mechanism. It is preferable that the timing for driving the pressing member can be arbitrarily controlled during the injection molding step of the resin frame. For example, the timing at which the pressing member is driven with the lapse of time from the start of injection of the synthetic resin material may be controlled. In order to improve the adhesion between the window plate and the resin frame, a primer treatment with a urethane-based, phenol-based, acrylic-based, epoxy-based, silane-based adhesive, etc. is performed on the periphery of the window plate in advance. May be applied.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part showing a first example of the method for manufacturing a window material with a resin frame according to the present invention. The molding die 10 includes an upper die (first die) 11 and a lower die (second die) 12. The upper mold 11 and the lower mold 12 are connected to the cavity space 1.
5 having inner surfaces 11a and 12a. First, in a state where the upper mold 11 and the lower mold 12 are opened (not shown), a glass plate 13 as a window plate is disposed at a predetermined position on the lower mold 12. Next, the upper mold 11 and the lower mold 12 are closed. At this time, the glass plate 13 is clamped by predetermined portions of the upper die 11 and the lower die 12 of the molding die 10 in the vicinity of the periphery (inside the periphery). As shown in FIG. 1, an air cylinder 16 is nested in the lower mold 12. The movable part 16a of the air cylinder 16 as a pressing member
Is movable up and down in the lower mold 12 and its tip surface 1
6 b is exposed in the cavity space 15. In other words, the cavity space 15 is defined by the inner surfaces 11a and 12a of the upper mold 11 and the lower mold 12, the peripheral edge of the glass plate 13, and the tip surface 16b of the movable portion 16a. Before the resin injection and immediately after the resin injection shown in FIG.
The tip end surface 16b of 6a does not protrude from the inner surface 12a of the lower mold 12.

The resin frame 14 is formed of the synthetic resin material injected into the cavity 15. When attached to a vehicle or the like, the resin frame 14 has a front surface 14a that forms a part of the exterior of the vehicle and a back surface 14 that is disposed inside the vehicle.
b. When the resin frame 14 is held and cooled in this state, the inner surface 11 of the upper mold 11 of the resin frame 14 is cooled.
The sink marks 17 are generated on the surface 14a in contact with a as shown by a two-dot chain line in the figure.

Therefore, in the pressure holding / cooling step, as shown in FIG.
1 to the inner surface 1 of the lower mold 12.
2a is projected into the cavity space 15. At this time, the tip end surface 16b of the movable portion 16a presses the back surface 14b of the resin frame 14. By doing so, the internal pressure of the resin frame 14 is increased in the range of 2 to 25 MPa, and the occurrence of sink marks 17 shown in FIG. 1 is prevented.

According to the method of manufacturing a glass sheet with a resin frame as described above, a predetermined portion of the back surface 14b of the resin frame 14 is pressed by the movable portion 16a of the air cylinder 16 to thereby form the resin frame 14. The generation of sink marks 17 on the surface 14a can be prevented. Further, in the glass plate with the resin frame manufactured as described above, the movable portion 16 of the air cylinder 16 is used.
The mark pressed by a remains on the back surface 14b of the resin frame 14. Since this trace is formed on the back surface 14b of the resin frame 14, when the glass plate with the resin frame is mounted on a vehicle or the like, the glass plate is not exposed to the outside of the vehicle and does not deteriorate the appearance.

FIG. 3 is a sectional view showing a main part of a second example of the method for manufacturing a window plate with a resin frame according to the present invention. In the example described below, members having the same configuration and operation as those already described in the first example are denoted by the same reference numerals or corresponding reference numerals in the drawings to simplify or omit the description. . A pressing member 26 is movably fitted to the lower mold 22 in a direction substantially perpendicular to the up-down direction (left-right direction in the figure). The pressing member 26 is disposed so as to be able to penetrate the side portion 22 b of the inner surface 22 a of the lower mold 22, and the tip surface 26 a is exposed to the cavity space 25. A rack 26b is provided behind the pressing member 26 (leftward in the figure), and the rack 26b meshes with a pinion 26c driven by a driving unit (not shown).

The synthetic resin material injected into the cavity 25 forms the resin frame 24. At this time, the distal end surface 26a of the pressing member 26 is
2a does not protrude. The resin frame 24 in this state
As the pressure is maintained and cooled, sink marks 27 are generated on the surface 24a of the resin frame 24 as shown by a two-dot chain line in the figure. Therefore, in the pressure-holding / cooling step, the pressing member 26 has its tip end surface 26a protruding into the cavity space 25 in accordance with the rack 26b moving with the rotation of the pinion 26c driven by the driving means (not shown). At this time, the distal end surface 26a of the pressing member 26 presses the side surface 24c of the resin frame 24. By doing so, the resin frame 24
To prevent the occurrence of sink marks 27.

According to the method for manufacturing a glass plate with a resin frame as described above, a predetermined portion of the side surface 24c of the resin frame 24 is pressed by the distal end surface 26a of the pressing member 26,
The occurrence of sink marks 27 on the surface 24a of the resin frame 24 can be prevented. In addition, according to the glass plate with the resin frame manufactured in this manner, a mark pressed by the pressing member 26 remains on the side surface 24c of the resin frame 24. Since this trace is formed on the side surface 24c of the resin frame 24, an adhesive surface when the glass plate with the resin frame is mounted on a body panel of a vehicle or the like can be advantageously secured. That is, the bottom surface 24 of the resin frame 24
When an adhesive or the like is applied to d and a glass plate with a resin frame is mounted on a vehicle or the like, it is preferable that the bottom surface 24d is formed of a substantially uniform flat surface. In such a case, the resin frame 24
Is pressed by the pressing member 26, the bottom surface 24d of the resin frame 24 can be smoothed.

It should be noted that the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made. The present invention may be used in combination with the above-described means for providing a sink preventing recess. Further, a hydraulic cylinder or the like may be used as an external drive source of the pressing member.

[0019]

As described above, according to the method for manufacturing a window plate with a resin frame of the present invention, the internal pressure of the resin frame can be increased without increasing the pressure when injecting the synthetic resin material. Therefore, sink marks do not occur in the portion where the thickness of the resin frame is large. Therefore, it is possible to produce a window plate with a resin frame having a good appearance when mounted on a vehicle or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a first example of a window plate with a resin frame of the present invention.

FIG. 2 is a cross-sectional view of a principal part explaining the operation of the first example of FIG.

FIG. 3 is a sectional view of a main part showing a second example of the window plate with a resin frame according to the present invention.

[Explanation of symbols]

 10, 20 Molding die 11, 21 Upper die (first die) 11a, 21a Inner surface 12, 22 Lower die (second die) 12a, 22a Inner surface 13 Window plate 14, 24 Resin frame 15, 25 Cavity space 16 Air Cylinder (pressing member) 16a Movable part 17, 27 Depression (sink) 26 Pressing member

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F202 AA15 AA45 AD08 AH23 AR03 CA11 CB01 CB12 CK18 CK43 CK52 4F206 AA15 AA45 AD08 AH23 AR034 JA07 JB12 JL02 JM05 JN25 JQ81

Claims (2)

[Claims] 1. A cavity is formed between an inner surface of a molding die and a periphery of a window plate material by holding the vicinity of a peripheral portion of the window plate material by a molding die, and injecting a synthetic resin material into the cavity space. Then, after the synthetic resin material is solidified, the molding die is opened, and the resin frame is taken out of the molding die with the window frame with the resin frame molded integrally with the window plate. In the method for manufacturing a window plate material, a predetermined portion of the resin frame body is pressed by a pressing member arranged in the molding die from the start of injection of the synthetic resin material to the opening of the molding die. Manufacturing method of a window plate with a resin frame. 2. The resin frame according to claim 1, wherein the resin member is pressed by the pressing member in a pressure holding / cooling step of an injection molding step so that the internal pressure of the resin frame is 2 to 25 MPa. Manufacturing method of window plate.