JP2668092B2 - Glass edge frame forming method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an edge frame made of a synthetic resin on a peripheral portion of glass such as a window glass for an automobile.

2. Description of the Related Art As shown in, for example, FIGS. 3 and 4, an edge frame 2 made of a synthetic resin material such as a vinyl chloride resin (PVC) is provided on a peripheral portion of a glass 1 as shown in FIGS. Some have formed.

Such an edge frame 2 plays a role as a molding for improving close contact with a sash and smoothness when mounted on an automobile.

As a method of integrally forming such an edge frame 2 on the peripheral portion of the glass 1, there is a method called module molding.

In this method, as shown in FIG. 5, the upper mold 3 and the lower mold 4 are closed with the glass 1 interposed therebetween, and a hollow shape formed so as to surround the peripheral edge of the glass 1 at that time. The synthetic resin material 6 is injected into the resin filling portion 5 and molded to form a synthetic resin frame 2 around the periphery of the glass 1. Thereafter, the upper mold 3 and the lower mold 4 are vertically moved. Opening is to take out (release) the glass 1 in which the edge frame 2 is integrally formed at the periphery.

In FIG. 5, reference numerals 7 and 8 denote opposing surfaces of the upper die 3 and the lower die 4, respectively. When they are closed, the projections 11 and 12 are arranged so as to be in close contact with the upper and lower surfaces slightly inside the outer peripheral edge of the glass 1, and are continuous with the outside of each projection 11 and 12, and the upper mold 3 and the lower mold 4 are formed so as to form a hollow resin-filled portion 5 when closed with each other.
13,14 are provided.

An injection hole for injecting the synthetic resin material 6 into the resin filling portion 5 is not shown.

An adhesive (not shown) may be provided on the periphery of the glass 1 as necessary to improve the adhesion between the glass 1 and the edge frame 2.
May be attached.

Problems to be Solved by the Invention According to the conventional module molding method as described above, when the glass 1 is a tempered glass, it can be carried out without any trouble. However, as shown in FIG. ,
When a laminated glass having a three-layer structure in which a synthetic resin material layer 17 is formed between two glass plates 15 and 16 or a non-reinforced plate glass is used, the slight difference between the upper mold 3 and the lower mold 4 Due to dimensional errors or local changes in the thickness of the glass 1, the upper mold 3
When the glass 1 is sandwiched between the lower mold 4 and the
By the corners 11a, 12a of 2 hitting the glass 1 line,
The glass 1 may be broken or cracked.

Therefore, the corners 11 of the convex portions 11 and 12 of the upper die 3 and the lower die 4
If the a and 12a are chamfered into a curved surface such as an arc, the above-described breakage or cracking of the glass 1 can be prevented, but in such a case, the boundary between the glass 1 and the edge frame 2 is unclear. And other problems such as uneven appearance and poor appearance.

In view of the above problems, the present invention can prevent the risk of breakage and cracking of the glass, and can make the boundary between the glass and the edge frame clear and improve the appearance. It is intended to provide a forming method.

Means for Solving the Problems In order to achieve the above object, the glass edge frame forming method of the present invention closes the upper mold and the lower mold with the glass interposed therebetween, at which time the peripheral portion of the glass is In a method for forming an edge frame made of synthetic resin on the periphery of glass by injecting and molding a synthetic resin material into a hollow resin-filled portion formed so as to surround the glass, an upper mold is provided. And, when the upper and lower molds are closed to each other, the corners of the convexities that are in close contact with the upper and lower surfaces of the glass are continuous with the inside of the groove forming the resin-filled portion on the opposing surface of the lower mold. A protuberance whose chamfering is on a curved surface and whose protruding amount at the tip is slightly smaller than the protruding amount at the tip of the protruding portion at a portion facing the upper or lower surface of the glass in at least one of the upper and lower grooves. Forming part and combining with resin filling part After injecting and molding the resin material, and releasing the mold, cutting off a portion inside the concave line formed on the side surface of the edge frame by the raised portion from the edge frame formed on the peripheral portion of the glass. Features.

When the upper mold and the lower mold are closed with the glass in between, the convex portions formed on the opposing surfaces of the upper mold and the lower mold are in close contact with the upper and lower surfaces of the glass, and the glass is The part is supported so as to be located at the regular position of the resin filling part.

At this time, since the corners of each convex portion are chamfered in a curved shape, even if the portions hit against the surface of the glass,
The risk of glass breakage or cracking is low.

Also, since the amount of protrusion at the tip of the protruding part is smaller than the amount of protrusion at the tip of the protruding part, when the glass is sandwiched between the upper mold and the lower mold, the tip of the protruding part must come into contact with the surface of the glass. Therefore, even if the tip of the ridge is pointed, the glass does not abut on the ridge and is not broken or cracked.

Moreover, after the mold release, by cutting off the portion inside the concave streak from the edge frame formed on the peripheral edge of the glass along the concave portion formed by the raised portion, the boundary portion between the glass and the edge frame is reduced. It becomes clear and the appearance is improved.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows one implementation of the method of the present invention. In addition,
In this embodiment, members corresponding to those shown in FIGS. 3 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, as shown in FIG.
And the corners 11a of the projections 11, 12 on the respective opposing surfaces 7, 8 of the lower mold 4,
12a is chamfered into an arcuate curved surface, and the groove 1
A protruding portion 20 is formed in a portion of the glass 4 facing the lower surface of the glass 1 so that the protruding amount A1 of the tip is slightly smaller than the protruding amount A2 of the protruding portion 12 (A1 <A2).

Corner portion 20 near the periphery of glass 1 at the tip of raised portion 20
a is preferably a right angle or a pointed shape having a slightly acute angle, and the inner corner portion 20b near the periphery of the glass 1 at the base of the raised portion 20 is preferably a gentle curved surface.
The inner corner portion 20c and the inner corner right portion 20d may have any shape.

In the first embodiment, an edge frame is formed using the upper die 3 and the lower die 4 as follows.

First, with the upper mold 3 opened upward with respect to the lower mold 4,
For example, a glass 1 made of laminated glass having a three-layer structure in which a synthetic resin material layer 7 is formed between two glass plates 15 and 16 similar to that shown in FIG. It is placed at a predetermined fixed position (the positioning means is not shown) so as to be in close contact.

At this time, since the tip of the raised portion 20 is slightly lower than the tip of the convex portion 12, the raised portion 20 does not come into contact with the glass 1.

Next, as shown in FIG. 1, the tip end surface of the convex portion 11 of the upper mold 3 is in close contact with the upper surface of the glass 1, and the outer portions of the opposing surfaces 7, 8 of the upper mold 3 and the lower mold 4 are in close contact with each other. Then, the upper mold 3 is lowered to close the upper mold 3 and the lower mold 4 together.

At this time, since the corners 11a and 12a of the projections 11 and 12 are chamfered in an arc shape, stress is prevented from being concentrated locally on the glass 1, and the risk of breakage or cracking of the glass 1 is reduced. .

Next, by closing the upper mold 3 and the lower mold 4 together,
Resin filling part 5 formed by those concave groove parts 13 and 14
Then, the synthetic resin material 6 is injected and molded.

After the synthetic resin material 6 is cured, it is opened above the upper mold 3 and the lower mold 4, and the glass 1 having the peripheral frame 2 formed on the peripheral edge is taken out from the lower mold 4 (release).

Next, as shown in FIG. 2, the raised portion 20 in the concave groove portion 14 of the lower mold 4 is moved from the edge frame 2 formed on the peripheral portion of the glass 1.
Thereby, the cut portion 2a inside the concave streak 21 formed on one side surface of the edge frame 2 is cut.

In order to cut off the cutout portion 2a from the edge frame 2, for example, as shown in FIG. 2, one side surface such as a cutter knife 22 or a rotary blade (not shown) rotatably supported by the tip of a support rod is recessed. A cut is made by moving along the outer side surface of the ridge 21 and moving the tip of the blade to reach the surface of the glass 1, and thereafter or simultaneously, between the surface of the glass 1 and the cutout 2a. Then, it is preferable that the cut-off portion 2a is peeled off from the glass 1 in the manner of deburring by inserting a single-edged stripping tool 23 and moving it along the surface of the glass 1.

For such work, the cutter knife 22 (or rotary blade)
By moving the combination of the release tool 23 and the release tool 23 along the outer side surface of the concave streak 21, automation can be achieved.

When molded in the same manner as in the first embodiment, the boundary between the surface (the lower surface in FIG. 1) of the glass 1 from which the cutout portion 2a has been cut and the edge frame 2 is clear, and exhibits a beautiful appearance.

In order to sharpen the boundary between the edge frame and the glass 1 on both surfaces of the glass 1, as shown by imaginary lines in FIG. A raised portion 24 is provided which is vertically symmetrical with 20 so that the edge frame 2
A portion of the edge frame 2 inside the concave streak (not shown) formed in the above may be cut off in the same manner as described above.

In addition, when an adhesive is used to improve the adhesion between the glass 1 and the edge frame 2, the application of the adhesive between the glass 1 and the cutout 2a is omitted, so that the cutout 2a is formed. It can be easily removed.

Advantageous Effects of the Invention As is clear from the above, according to the present invention, the corners of the protrusions on each of the opposing surfaces of the upper mold and the lower mold that are in close contact with the glass are chamfered in a curved shape to prevent breakage and cracking of the glass. It is possible to prevent the boundary between the glass and the edge from being blurred by chamfering the convex portion by cutting off a part of the edge frame that forms such a blurred boundary after the edge frame is formed. And a clear and beautiful appearance at the boundary can be provided.

In addition, by the raised portion provided in the upper or lower groove portion,
The concave streaks formed in the edge frame after molding serve as a guide when cutting a part of the edge frame, and also serve to form a part of a sharp boundary portion.

In other words, the formation of the concave streak in the edge frame by the raised portion facilitates the cutting operation of a part of the edge frame and contributes to a beautiful appearance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the method of the present invention, FIG. 2 is a perspective view showing a situation when a part of the edge frame is cut off from the same molded frame, and FIG. FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is a longitudinal sectional front view showing one embodiment of the conventional method, and FIG. The figure is a longitudinal sectional view of a main part showing an example of a conventional laminated glass. 1 ... glass, 2 ... edge frame, 2a ... cutout part, 3 ... upper mold, 4 ... lower mold, 5 ... resin filling part, 6 ... synthetic resin material, 7, 8 ... facing surface , 9,10 …… Concave part, 11,12 …… Convex part, 11
a, 12a ... corner, 13,14 ... groove, 15,16 ... glass plate, 17 ... synthetic resin material layer, 20 ... bulge, 20a, 20c ...
... corners, 20b, 20d ... inner corners, 21 ... concave streaks, 22 ... cutter knives, 23 ... strippers, 24 ... ridges.

Claims (1)

(57) [Claims] An upper mold and a lower mold are closed with glass therebetween, and a synthetic resin material is injected into a hollow resin-filled portion formed so as to surround the periphery of the glass at that time. In the glass edge frame forming method of forming an edge frame made of synthetic resin on the peripheral edge portion of the glass, the upper and lower molds are continuously formed inside the concave grooves forming the resin-filled portions on the opposing surfaces. And, when the upper mold and the lower mold are closed, the corners of the convex portions that are in close contact with the upper surface and the lower surface of the glass are chamfered in a curved shape, and the concave groove portion of at least one of the upper mold and the lower mold. In the portion facing the upper or lower surface of the glass in the above, to form a raised portion with the amount of protrusion of the tip slightly smaller than the amount of protrusion of the tip of the convex portion, inject and mold a synthetic resin material into the resin filling portion, and After demolding, molded on the periphery of the glass Edge frame forming method of the glass, characterized in that the frame, to ablate inner portion than convex formed on the side surface of the edge frame by said ridges.