JP3142753B2 - Wind molding bending equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus for wind molding.

[0002]

2. Description of the Related Art For example, as shown in FIG. 6, a rear window glass W of an automobile is attached to a vehicle body B via a plastic window molding 50 formed in a long and narrow string shape. The wind molding 50 is shown in FIG.
As shown in the cross-sectional view of FIG. 5, a flexible molding body 51 has a glass fitting groove 52 in the longitudinal direction thereof.
The entire molding 50 is bent into a window frame shape in a loop while being fitted to the edge of the window glass W, and is attached to the vehicle body B with the adhesive A. Numeral 53 in the figure indicates a metal thin plate for holding the shape (it may be a metal wire), numeral 54 indicates a fin that contacts the body B, and numeral J in FIG. 6 indicates a joint between both ends of the molding 50.

However, in recent years, the bending radius of the corner portion of the window frame may be reduced due to a change in the body shape or the like. For example, the corner portion indicated by the reference symbol C in FIG. 6 has an acute angle. When the bending radius of the corner portion C becomes small,
Although the molding 50 itself bends due to its flexibility, the work of attaching to the window glass W and the body B cannot be performed smoothly due to the resilience of the plastic, and the work efficiency is deteriorated. The problem of variation in finish also arises. Therefore, in order to cope with such a corner portion C having a small bending radius, the following means have conventionally been adopted.

[0004] First, as shown in FIG. 8, each end 61, 61 of a linear molding 60, 60 is inserted and connected using a corner piece 70 without bending the molding itself. . However, when this corner piece 70 is used, it is necessary to separately mold the corner piece 70 by, for example, injection molding or the like, which requires not only equipment and steps but also a molding end portion. There is a disadvantage in cost and process, for example, a step of inserting and connecting the 61 is required. In addition, a step 64 and a joining line 65 appear between the corner piece 70 and the molding 60, and there is also a problem in appearance due to a difference in material, color, gloss, and the like between the two.

[0005] Therefore, it has been proposed to use a single molding to bend it to a predetermined radius to give a habit. As one of the means, there is a bending process using a high frequency as shown in FIG. First, the molding body is held by an upper mold 81 having a mold surface 82 formed into a predetermined curve corresponding to a bending radius of a corner portion and a lower mold 85 having a molding surface 86, while the glass fitting groove 102 of the molding body is held. Similarly, the insertion mold 90 having a predetermined curved mold surface 91 corresponding to the bending radius of the corner portion is inserted, and the molding 100 is held.

Next, a high-frequency oscillator 110 connected to the upper die 81 and the lower die 85 via electrodes to generate high frequency and hold the molding 10 held in the die.
0 is heated and bent into a predetermined mold surface shape. Note that a guide member 87 made of a non-conductive material such as silicon rubber is used to easily set the molding 100 at a predetermined position and form a predetermined shape. The insertion mold 90 that contacts the upper mold 81 and the lower mold 85 is made of a non-conductive material such as Teflon.

The bending by the high frequency heating is an excellent method itself. However, in this type of wind molding 100, a metal sheet or metal wire made of aluminum, iron, or the like is provided with a core material 105 for shape retention.
Often buried as. When the conductive material is used for the molding material,
Due to the fact that the molding is long, radio wave leakage is likely to occur, as a result, heat is applied only to the peripheral portion of the metal material and unevenness is likely to occur, and the entire molding must be set to the optimal heating state for bending. Becomes difficult. There are also safety issues.

As another means relating to the bending of the molding, there is a molding after heating the molding as shown in FIG. By this means, molding 1
Heat is applied by blowing hot air from the outside of the mold 20, usually in the vertical direction, and heated to be introduced into a mold having a predetermined mold surface to form a mold. In this method, since the external heating is performed, the problem of the metal core material 125 does not occur. However, since the warm air is blown from the outside of the molding 120, particularly from above and below, it is not possible to sufficiently heat the hanging center 122, which is the bending center of the molding 120, and it is difficult to form a bent shape, which tends to be uncertain. In addition, molding 1
Since the warm air is directly blown onto the upper surface 121 which is the design surface of the upper surface 20, the temperature of the upper surface 121 rises more than necessary, and the design surface of the corner portion to be bent is partially glossy and the whole A problem arises that the appearance of the device is impaired.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention
The present invention has been proposed in view of such a problem, and proposes a novel bending apparatus capable of efficiently and reliably performing heating for forming a molding and performing molding thereof.

[0010]

That is, the present invention provides:
An apparatus for bending a molding having a glass fitting groove for fitting an edge of a window glass in a longitudinal direction of a molding body in a predetermined curve shape, wherein a bending mold for holding the molding body in a predetermined curve shape, A plurality of insert-type surfaces that enter the glass-fitting groove and hold the glass-fitting groove in a predetermined curved shape, and that are heated by blowing hot air onto the glass-fitting groove at the tip of the insert-type surface; The present invention relates to a bending apparatus for a wind molding, which includes an insertion mold having an air blowing portion formed of a hole and a concave groove following the hole.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a main part showing an example of a bending die and an insertion die used in the present invention, FIG. 2 is a longitudinal sectional view showing a molding bending state, and FIG. 3 is a perspective view of a main part of the insertion die. 4 is a longitudinal sectional view showing a plug-in type air blowing portion, and FIG. 5 is a cross-sectional view showing another example of the plug-in type.

As shown in FIG. 1, the present invention provides a window molding 10 having a glass fitting groove 12 for fitting an edge of a window glass in a longitudinal direction of a molding body 11.
The present invention relates to an apparatus that bends into a predetermined curve so as to correspond to the corner portion shape of a window frame. In the present invention, the glass fitting groove 12 of the molding body 11 is provided.
The molding main body 11 is shaped by an insertion mold 30 that enters the glass fitting groove 12 while being heated by blowing hot air on the molding body 11.

As described in the section of the prior art, the bending of this type of wind molding 10 incorporating the metal core material 15 has many disadvantages in the heating and shaping by high frequency, while the external heating by hot air. However, there is a problem in that the heating of the center 16 of the hanging part, which is the center of the bending, is insufficient, and the appearance of the upper surface 17 which is the design surface of the molding is deteriorated due to the heat at the time of heating. In this invention, in view of such a point, warm air is blown directly onto the glass fitting groove 12 closest to the hanging center 16 of the molding main body 11 which is the bending center part of the molding, and the glass fitting is simultaneously performed. The molding body 11 is shaped by the insertion mold 30 that enters the groove 12. By employing such a means, the hanging center 16 serving as the bending center can be appropriately heated, so that the bending shape can be reliably formed. At the same time, since the upper surface 17, which is the molding design surface, is not directly heated, it is possible to avoid the problem of appearance deterioration due to excessive heating.

In order to shape the heated molding body 11 into a predetermined bent shape, this can be performed by an insertion mold 30 which enters the glass fitting groove 12. In order to perform this shaping more efficiently and reliably, the molding body 11
After being held in the bending mold 20 in advance, the molding body 1
The insertion mold 30 that enters the glass fitting groove 12 while blowing hot air into the glass fitting groove 12 and heating it is used.

As shown in FIG. 1 and FIG. 2 which is a longitudinal sectional view at the time of the bending process, the bending die 20 holds the molding body 11 except for the glass fitting groove 12 side in a predetermined curved shape. And a lower mold 21 and an upper mold 25. Reference numeral 49 is a base. The lower die 21 is formed with a groove-shaped lower die surface portion 22 formed in a predetermined curved shape. As shown in FIG. 2, the lower die surface portion 22 has a substantially lower half portion of the molding body 11 and a lower surface of the fin 13. The side is held and held. On the other hand, upper mold 2
5 is formed with a groove-shaped upper mold surface portion 26 having a predetermined curved shape corresponding to the lower mold surface portion 22 of the lower mold 21, and presses the upper surface of the molding body 11 and the upper surface of the fin 13 when the mold is closed. Hold. Although not shown, the bending mold 20 including the lower mold 21 and the upper mold 25 is provided with an appropriate mold opening / closing mechanism (eg, a hinge or a clamp).

As described above, the insertion mold 30 enters the glass fitting groove 12 while blowing hot air onto the glass fitting groove 12 of the molding body 11 and heating the molding body 11 to form the molding body 11 into a predetermined curved shape. It is shaped. Accordingly, the insertion mold 30 is formed with an insertion mold surface portion 31 that enters the glass fitting groove 12 and holds the glass fitting groove 12 in a predetermined curved shape. As shown in FIG. 3, the thickness t of the insertion type surface portion 31 is formed to be substantially the same as the thickness of the window glass fitted in the glass fitting groove 12.

An air outlet 32 is provided at the end of the insertion surface 31 for blowing hot air onto the glass fitting groove 12 to heat it. As shown in FIG. 3, the air blowing portion 32 includes a plurality of holes 33, 33 and a concave groove 34 following the holes 33, 33, and communicates with an air flow path 35 in the insertion mold 30. The air flow path 35 is connected to an external hot air blowing device (not shown) via an air reservoir 36.

The groove 34 of the air blowing portion 32 allows the warm air blown out from the holes 33, 33 to sufficiently spread to the entire glass fitting groove 12, and also forms a mold. Air can be blown out from the hole 33 even when the insertion surface 31 is pressed against the inner bottom surface 12b of the glass fitting groove 12 when closed.

In this example, hot air is supplied from a hot air blowing device provided outside. On the other hand, a heater 40 is provided inside the insertion mold 30A, as in the insertion mold 30A shown in FIG. The air may be warmed by the heater 40 and the warm air may be blown out from the air blowing unit 32. When the heater 40 is provided in the insertion mold 30, it is preferable to use Teflon excellent in heat resistance and heat insulation as a material of the insertion mold 30.

As shown in FIG. 1, an operation member 37 of an air cylinder device (not shown) is connected to the insertion mold 30, and the operation of the operation member 37 of the air cylinder device causes the operation of the insertion mold. 30 is configured to be able to advance and retreat with respect to the bending mold 20 (lower mold 21). FIG.
In the figure, reference numeral 24 denotes an insertion mold 30 provided in the lower mold 21.
Reference numeral 38 denotes a slide key of the insertion mold 30 which slides on the slide groove 24.

Next, a description will be given of a process of bending the wind molding 10 by the above-described apparatus. First, the lower half portion of the molding body 11 is inserted into the lower mold surface portion 22 provided on the lower mold 21 of the bending mold 20 and held in a predetermined shape. Next, the insertion mold 30 is advanced by the cylinder device, and the insertion mold surface portion 31 is inserted into the glass fitting groove 12 of the molding body 11 held by the lower mold 21.

At the same time, the insertion surface 3 of the insertion die 30
The molding body 11 is heated from the inside of the glass fitting groove 12 by blowing warm air from the air blowing part 32 provided on the glass fitting groove 12 to the glass fitting groove 12. The hot air temperature in this case is about 150 ° C. in the embodiment. Mall body 1 with warm air
When the heating of 1 is completed (about 10 seconds in the example),
As shown in FIG. 2, the upper die 25 is closed with respect to the lower die 21, and the lower die surface 22 of the lower die 21, the upper die surface 26 of the upper die 25, and the insertion die 30 are used to form the molding body 11.
(Shape) is performed.

In the embodiment, at the same time when the upper mold 25 is closed, the cool air (room temperature air) is blown from the air blowout portion 32 of the insertion mold 30. Switching between the warm air and the cool air blown out from the air blowing unit 32 can be performed by timer control. After a predetermined time (about 15 seconds in the embodiment) after closing the mold, the upper mold 25 is opened, the insertion mold 30 is retracted from the lower mold 21, the molding 10 is taken out, and the bending is completed.

Here, it should be added that, in the present invention in which the molding body 11 is heated by blowing hot air onto the glass fitting groove 12, in the present invention, the fin 13 which is on the opposite side to the blowing side of the hot air is provided.
In order to heat the part, as shown in FIG.
The heater 45 may be built in the vicinity of the mold surface which comes into contact with the fin piece 13 of FIG.

When the bending radius of the molding 10 is even smaller, the molding main body 11 serving as a bent portion is formed.
A plurality of saw blade-shaped notches may be formed on the glass fitting groove 12 side.

[0026]

As shown and described above, according to the present invention, hot air is directly blown into the glass fitting groove closest to the center of the hanging portion, which is the bending center of the window molding, and the glass is heated. Since it is shaped into a predetermined bending shape by the insertion mold that enters the fitting groove, the center of the hanging part, which is the bending center part of the molding, is efficiently and appropriately heated, and the bending shape is reliably formed. It can be carried out.

At the same time, according to the present invention, instead of directly heating the upper surface which is the molding design surface, the molding body is heated by blowing warm air into a glass fitting groove which does not cause a problem in appearance. Therefore, the problem of deterioration of the appearance of the molding can be completely avoided.

Further, according to the present invention, it is possible to realize an efficient wind molding bending process which can be realized by a simple device or mechanism, and which can be inexpensive and increase the cycle of the bending process. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an example of a bending die and an insertion die used in the present invention.

FIG. 2 is a longitudinal sectional view showing the state of the molding bending process.

FIG. 3 is a perspective view of a main part of the insertion type.

FIG. 4 is a longitudinal sectional view showing a plug-in type air blowing portion.

FIG. 5 is a sectional view showing another example of the insertion type.

FIG. 6 is a front view showing an attached state of a window glass by window molding.

FIG. 7 is a sectional view taken along line 7-7 in FIG. 6;

FIG. 8 is a plan view showing an example of a window molding using a corner piece in a bent portion.

FIG. 9 is a longitudinal sectional view showing an example of a molding bending method using high frequency.

FIG. 10 is a longitudinal sectional view showing an example of a molding bending method using warm air.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wind molding 11 Mold main body 12 Glass fitting groove 20 Bending mold 21 Bending mold lower mold 25 Bending mold upper mold 30 Insertion mold 31 Insertion mold surface part 32 Air blowing part

Claims (1)

(57) [Claims] 1. An apparatus for bending a molding having a glass fitting groove for fitting an edge of a window glass in a longitudinal direction of a molding body in a predetermined curve shape, wherein the molding body is held in a predetermined curve shape. A bending die, having a plug-in surface portion that enters the glass fitting groove to hold the glass fitting groove in a predetermined curve shape, and heats the glass fitting groove by blowing hot air onto the tip of the plug-in surface portion. A wind-mold bending apparatus, comprising: an insertion die formed with a plurality of holes and an air blowout portion formed by a concave groove following the holes.