JPS6337914A - Manufacture of window molding - Google Patents

Abstract

PURPOSE:To give an excellent external appearance at the corner part and prevent the lateral flow and deflection of rain water from occurring at the side part of a molding material by a method wherein a dam is formed by heating and softening the tip part of a projecting strip and at the same time by expanding a foaming resin layer under the state that the side part of the molding material is inserted in a shaping mold. CONSTITUTION:Shaping molds 28 are provided at both side parts corresponding to the side parts 6 and corner parts 11 of a molding 4. The shaping of a molding material 24 is performed by heating it under the state being pinched between the bottom force 29 and top force 30 of the shaping mold 28 with a heating source 31 so as to soften the tip part of a projecting strip 4b by heating, and at the same time to start the foaming of a foaming resin layer 17 in a solid or medium expansion state to turn into the expansion of a foamed resin layer 18 to form a dam 16. In other words, since the formation of the dam is performed by foaming the foaming resin layer after the extrusion of the molding material, a single molding, in which an upper part and the side parts are integrally and continuously foamed, can be easily and accurately manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a window molding to be attached to a front window of a vehicle.

[Conventional technology]

Fig. 11 is a perspective view of the vehicle, where 1 is the vehicle body, 2 is the window plate (windshield glass), 3 is the side window (door glass), 4 is the window molding, 5 is the upper part, and 6 is the side part. It is.

FIG. 12 is a sectional view taken along the line AA in FIG. 11, showing the conventional window molding disclosed in Japanese Utility Model Publication No. 57-54416. The molding 4 in the side part 6 extends from the molding body 4a covering the gap between the window plate 2 and the vehicle body panel (pillar) 7 to the window plate 2.
A groove 8 is formed between the window plate 2 and the window plate 2 by the protrusion 4b projecting to the side.

9 is an adhesive, and 10 is a dumb rubber.

In the window molding described above, water droplets adhering to the window plate 2 when driving in the rain are collected in the groove 8 and flow down, so that they cross the vehicle body panel (pillar) 7 and flow sideways to the side window 3, blocking the visibility of the side window 3. Obstruction is prevented.

[Problem that the invention seeks to solve]

However, in such a conventional window molding, the molding 4 has a protrusion 4b formed on the side part 6, but if the protrusion 4b has flexibility, it becomes unstable and shakes occur. There was a problem.

In addition, since the protrusion 4b is not formed in the upper part 5, it is necessary to manufacture molding materials with different cross-sectional shapes for the upper part 5 and the side part 6.
In order to integrate these, it is necessary to connect them at the corner part 11. In order to join two molding materials with different cross-sectional shapes in this way, if they are joined by injection molding or the like, cracks etc. will be formed at the joint, which will spoil the appearance.
If they were joined using a corner joint or the like, there were problems such as an increase in the number of parts and the number of assembly steps.

This invention is intended to solve the above-mentioned problems, and uses the same molding material for part of the upper part and the side part, and has a continuous excellent appearance in part of the corner, and also allows rainwater to flow horizontally in the side part. To provide a method for manufacturing a window molding that can easily and accurately manufacture a window molding that can prevent vibration and shake.

[Means for solving problems]

This invention provides a molding body that covers the gap between a window plate and a vehicle body panel, a protrusion made of a thermoplastic material that protrudes from the molding body in a lip shape so as to cover and abut the outer periphery of the window plate, and this protrusion. a step of extruding a long molding material having a constant cross-sectional shape and having a foamed resin layer in an unfoamed or intermediately foamed state continuously formed inside the molding material; a step of cutting the molding material into a certain size; inserting at least a side portion of the molding material into a shaping mold;
This method of manufacturing a window molding includes the steps of heating and softening the tips of the protrusions and foaming a foamed resin layer to form a weir.

[For production]

In the method for manufacturing a window molding of the present invention, there is provided a molding body that covers the gap between the window plate and the vehicle body panel, a protrusion that protrudes from the molding body in a lip shape so as to cover and abut the outer periphery of the window plate, and the protrusion. A long molding material with a constant cross-sectional shape having a foamed resin layer in an unfoamed or intermediately foamed state continuously formed inside the strip is extruded, and this molding material is cut into a certain size, and the molding material At least the side portions of the window molding are inserted into a shaping mold, the tips of the protrusions are heated and softened, and the foamed resin layer is foamed to form a weir, thereby producing a window molding.

The step of cutting the molding material may be performed before or after the step of forming the weir.

The window molding manufactured in this manner uses the same window molding for the upper part and the side part, and is attached so as to be continuous at the corner part. At this time, the molding body covers the gap between the window plate and the vehicle body panel through the upper part and the side part, and forms a continuous weir around the window plate in the side part.

In this state, rainwater flowing on the window plate is collected in a weir at the side portion and flows down, preventing lateral flow to the side window. Although no weir is formed in a portion of the upper, the window molding is integrally continuous with the side portion at a portion of the corner, so there is no need for a corner member for connection, resulting in an excellent appearance. Further, since no grooves are formed in the side portions, no runout occurs.

〔Example〕

FIG. 1 is a sectional view taken along line BB in FIG. 11 showing a window molding manufactured in one embodiment of the present invention;
The figure is a sectional view taken along line A-A, and the same reference numerals as in FIGS. 11 and 12 indicate the same or corresponding parts.

The window plate 2 is made of transparent inorganic glass or a transparent resin plate such as polycarbonate resin or acrylic resin.

Window molding 4 is made of soft PvC resin.

Flexible thermoplastics such as ionomer resins, EVA resins, transparent CAB resins, and other elastomer resins;
The mounting legs 14 are made of a material such as non-foamed rubber or synthetic resin and are formed into a long length with a core material 12 buried therein as required, and extend from the molding body 4a that covers the gap 13 between the window plate 2 and the vehicle body panel 7. It extends into the gap 13. The molding body 4a has a structure in which protrusions 4b and 4c are formed on both sides from the protrusion of the mounting leg 14.

The tips of the protrusions 4b form a lip 15 on the upper portion 5 and a weir 16 on the side portion 6, and are in contact with the window plate 2, respectively. On the inside of the protrusion 4b, an unfoamed or intermediately foamed foamed resin layer 17 is formed in the upper portion 5, and a foamed resin layer 18 is formed in the side portion 6. The protrusion 4c passes through the upper part 5 and the side part 6 to form a lip 15, and abuts on the end of the vehicle body panel 7 so as to cover it. An engaging fin 14a is provided on the side of the vehicle body panel 7 of the mounting leg 14, and engages with the step part fa of the vehicle body panel 7, and an engaging fin 14b is provided on the lower part of the mounting leg 14 on the side of the window plate 2.
It engages with the end of the window plate 2. Such a window molding 4 is integrated from the upper part 5 to the side part 6, and the tips of the protrusions 4b are deformed so that the upper part 5 and the side part 6 have different structures. An opaque print layer 19 is formed on the back surface of the outer peripheral portion of the window plate 2.

FIG. 3 is a sectional view taken along the line A-A showing another window molding, which has almost the same structure as the above, except that a weir 16 is formed with a 1l18.

Figure 4 is a BB sectional view showing another molding;
The figure is an AA sectional view, and the unfoamed or intermediately foamed foamed resin layer 17 and the foamed foamed resin layer 18 are exposed on the inner surface of the protrusion 4b.

6 to 10 show a method for manufacturing a window molding according to an embodiment of the present invention, FIGS. 6 and 7 are front views of another manufacturing apparatus, FIG. 8 is a front view of a shaping mold, and FIG. The figure and FIG. 10 are cross-sectional views taken along the line C--C showing the shaped state.

The manufacturing method of the molding 4 is as shown in FIG.
A molding having the same cross-sectional shape as the molding 4 in FIG. 1 is obtained by double extrusion molding a thermoplastic non-foamed resin 22 such as a resin, and a foamed resin 23 in an unfoamed or intermediate foamed state that is compatible with the resin. A material 24 is formed, cooled in a cooling tank 25, taken out by a take-up machine 26, and cut into a constant size 2 (Ω1◆Qx')"I2s by a cutting machine 27. In FIG. 7, the core material 12 is omitted. The foamed resin 23 in an unfoamed or intermediately foamed state is supplied to the extrusion mold 21 in the form of a separately manufactured string.

Next, as shown in FIGS. 8 and 9, the side portions 6 and corner portions 11 of the cut molding material 24 are inserted into a shaping mold 28 to form a weir 16.

The shaping mold 28 is provided on both sides corresponding to the side part 6 and the corner part 11 of the molding 4, and has a lower mold 29 and an upper mold 30, respectively.
A heating source 31 made of a high frequency heating electrode is provided at a portion corresponding to the tip of the ridge 4b.

The molding material 24 is shaped by sandwiching it between the lower mold 29 and upper mold 30 of the shaping mold 28 and heating it with a heating source 31.
The tips of the protrusions 4b are softened by heating, and the unfoamed or intermediately foamed foamed resin layer 17 expands to form a foamed foamed resin layer 18 as shown in FIG. 16 is formed.

At this time, if the rigidity of the molding material 24 is poor, the molding material 24 may be
It is preferable to form the weir 16 in a controlled state by pulling it loosely.

In this embodiment, a complete weir 16 is formed at a portion Ω corresponding to the side portion 6, and the weir 16 is gradually eliminated at a portion Qz corresponding to the corner portion 11.

Although it is designed to be continuous with the part Q3 corresponding to the upper part 5, the weir 16 may gradually disappear at the end of the side part 6, and the corner part 11 may have the same shape as the upper part 5.

The molding 4 shown in FIGS. 1 and 2 is manufactured in the manner described above.

The third [1q] molding 4 is manufactured by changing the structure of the shaping die 28 in the method described above. In addition, the molding 4 shown in FIGS. 4 and 5 has a different structure of the extrusion mold 21, and one foamed resin layer 17 is formed on the protrusion 4b.
It is manufactured by exposing the inner surface of the material and shaping it in the same way.

In the above description, the lower mold 29 and the upper mold 3 of the shaping mold 28
0 is preferably made of a heat insulating material that does not have a thermal effect on the molding material 24, and a separate cooling means may be provided.Also, the heating source 31 may be electrical heating, but may be made of a dielectric material such as polyvinyl chloride resin. For resins with large losses, high frequency dielectric heating is preferred, in this case type 11 type 28
It is preferable that the molding material 24 be made of a material with low dielectric loss, such as polyolefin resin or tetrafluoroethylene resin, since other parts of the molding material 24 will not be heated.

The method of using the molding 4 manufactured as described above is as follows. That is, in FIGS. 1 and 2, an opaque print layer 19 is formed in advance on the back surface of the outer periphery of the window plate 2, and the dam rubber 10 is
After the is attached, a string of liquid adhesive 9 is discharged around the entire outer circumference (including the lower part). Then, the window plate 2 is fitted into the stepped portion 7a of the intermediate suspension panel 7 and temporarily fixed to the flange portion 7b, and the mounting legs 14 of the molding 4 are attached between the window plate 2 and the vehicle body panel 7 before the adhesive 9 hardens. Insert it into the gap 13 and install it.

The same molding 4 is used through the upper part 5 and the side part 6, and is bent and attached at the corner part 11. At this time, the mounting leg 14 is inserted so that the molding body 4a covers the gap 13 between the window plate 2 and the vehicle body panel 7, and the engaging fins 14a and 14b are attached to the stepped portion 7.
a and window plate 2 and fixed with adhesive 9. At this time, the tip of the protrusion 4b contacts the window plate 2 at the lip 15 in the upper part 5 as shown in FIG. 1, and in the side part 6 by the weir 1 as shown in FIG.
6 comes into contact with the window plate 2.

When the molding 4 is used in this state, the side part 6
In this case, rainwater on the window plate 2 is collected in the weir 16 and flows down, and lateral flow to the side window 3 is prevented. Although the weir 16 is not formed in the upper part 5, the molding 4 is integrally continuous with the side part 6 at the corner part 11, so there is no need for corner parts, and the continuous surface provides an excellent appearance. In addition to this, stability against wind force while driving is improved, and no vibration occurs.

The molding 4 shown in FIGS. 3 to 5vf4 is similarly attached and used.

In addition, in the above embodiment, the upper part 5 and the side part 6
Although a lip 15 is formed at the tip of the protrusion 4c, forming a weir 16 at the tip of the upper portion 5 can prevent rainwater from flowing down from the roof panel to the window plate 2.

Further, the shape, structure, material, etc. of the molding 4, lip 15, weir 16, etc. are not limited to those shown in the drawings, and can be changed.

〔Effect of the invention〕

According to the present invention, since the molding material is extruded and then the foamed resin layer is foamed to form the weir, the same continuous molding can be easily and precisely formed as the molding in the upper part and the side part. This makes it possible to prevent rainwater from flowing sideways in the side parts, eliminates the need for connecting members and connecting processes at some corners, and provides a window molding with excellent appearance and stability that does not cause runout.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along line BB in FIG. 11 showing a molding manufactured according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA, and FIG. 3 is a sectional view taken along line AA of another molding. FIG. 4 is a BB sectional view showing another molding, FIG. 5 is an AA sectional view thereof, and FIGS. 6 to 10 show a method of manufacturing a window molding according to an embodiment of the present invention. 7 and 7 are front views of another manufacturing device, FIG. 8 is a front view of the shaping mold, FIGS. 9 and 10 are CC sectional views showing the shaping state, and FIG. 11 is a perspective view of the vehicle. figure,
FIG. 12 is a sectional view taken along line A-A showing a conventional molding. In each figure, the same reference numerals indicate the same or equivalent parts, 2 is the window plate, 4 is the molding, 4a is the molding body, 4b, 4c are the protrusions, 5 is a part of the upper,
6 is a side part, 7 is a vehicle body panel, 12 is a core material, 14 is a mounting leg, 15 is a lip, 16 is a weir, 17° and 18 are foamed resin layers, 21 is an extrusion mold, and 28 is a shaping mold. 31 is a heating source. Agent Patent Attorney Sei Yanagihara Figure 12

Claims (4)

[Claims] (1) A molding body that covers the gap between the window plate and the vehicle body panel, a protrusion made of thermoplastic material that protrudes from the molding body in a lip shape so as to cover and abut the outer periphery of the window plate; a step of extrusion molding a long molding material having a constant cross-sectional shape and a foamed resin layer in an unfoamed or intermediate foamed state continuously formed on the inside; a step of cutting the molding material into a certain size; A method for producing a window molding, comprising the steps of inserting at least a side portion of the molding material into a shaping mold, heating and softening the tips of the protrusions, and foaming a foamed resin layer to form a weir. (2) The manufacturing method according to claim 1, wherein the step of cutting the molding material is performed before or after the step of forming the weir. (3) The manufacturing method according to claim 1 or 2, wherein the shaping mold has a heating source. (4) Claim 1 in which the heating is high frequency dielectric heating
The manufacturing method according to any one of Items 1 to 3.