JPS62251114A - Manufacture and device for window panel - Google Patents

Abstract

PURPOSE:To reduce the number of broken sheet glasses for window and eliminate flashes by transferring a wedge in such a way that the interval between split cavity mold and core varies by means of a wedge provided between split cavity molds for insert molding rubber or non-rigid synthetic resin on the edge of sheet glass, adjusting the interval between the ore and split cavity mold slightly larger than the thickness of sheet glass, and insert molding material for molding in the cavity of split cavity mold after clamping. CONSTITUTION:By moving a wedge 4 formed and backward by means of adjusting screw 6 of a bottom force 1, the height of a core 8 is adjusted, and the interval between the upper face of the core 8 and the lower face of the top force 11 is set larger than the measured value X of thickness D of the sheet glass 15 by the clearance alpha. The sheet glass 15 is set on the upper face of the core 8 and clamped. Raw material for molding constituted with non-rigid synthetic resin is insert molded in the cavity C through a gate 12, and a window panel 20 bonding integrally a weatherstrip 19 with the edge of sheet glass 15 is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a method of manufacturing a window panel to be attached to a window of an automobile, and a structure of an apparatus used in the method.

(Prior Art) Conventionally, a window panel is known in which a molded body such as a weather strip is bonded to the peripheral edge of a plate glass by insert molding rubber or soft synthetic resin.

This window panel is manufactured by a method in which a glass plate 51 is held between an upper mold 52 and a lower mold 53, and rubber or the like is inserted into a cavity 54 formed at the peripheral edge of the glass plate 51, as shown in FIG. has been done.

(Problems to be Solved by the Invention) In the method described above, when the lower surface of the periphery of the upper mold 52 and the upper surface of the periphery of the lower mold 53 are brought into close alignment, the gap [between the two surfaces of the central portion] is held between them. Thickness D of plate glass 51
If it is the same as or slightly larger than , the plate glass 51 will not be damaged during mold clamping.

However, as shown in FIG. 7, if the distance is smaller than the thickness D of the glass plate 51, the upper surface of the glass plate 51 supported by the lower mold 53 will be higher than the lower surface of the upper mold 52.
During mold clamping, the plate glass 51 receives mold clamping pressure over its entire surface,
There is a problem that the plate glass 51 is damaged.

Therefore, in the prior art, the distance between the plate glass 51 and
The thickness D is set to be somewhat larger than the thickness D, and a clearance of about 0.05 to 0.1 mm is provided between the upper surface of the plate glass 51 and the lower surface of the upper mold 52.

However, there is variation in the thickness D of the glass plate 51, and if the thickness D varies toward the thinner side, cracks will occur in the molded product, and conversely, if the thickness D varies toward the thicker side, the glass plate 51 will still be damaged. There are problems that cannot be avoided.

An object of the second invention is to provide a method for manufacturing a window panel that can solve the above-mentioned problems, and an object of the second invention is to provide an apparatus used for effectively realizing the method, in particular:
To provide a device that can finely adjust the set position of a plate glass in the vertical direction.

Structure of the Invention (Means for Solving the Problems) A measuring process for measuring the thickness of a plate glass, a nest provided between split molds for insert molding, and one mold of the split molds. an adjustment step of adjusting the interval between the two to be slightly larger than the thickness; a setting step of setting a plate glass whose thickness has been measured between the two; a clamping step of clamping the split mold; The object of the first invention is achieved by employing a method comprising insert molding a molding raw material into a cavity to obtain a window panel in which a molded body is integrally joined to the peripheral edge of the plate glass. .

In addition, a wedge member and an insert in contact with the wedge member are provided between the split molds for insert molding rubber or soft synthetic resin on the peripheral edge of the plate glass, and a mold on the insert side of the split mold is provided. The object of the second invention is achieved by providing a device in which the split mold is provided with a moving means for moving the wedge member so that the distance between the wedge member and the insert changes.

(effect) The first invention operates as follows.

In the measurement process, the thickness of the glass plate used for manufacturing the window panel is measured. The set position of the plate glass in the split mold for insert molding is determined based on the thickness measurement result of the plate glass. This set position is a position where the distance between the insert and one of the split molds is greater than the thickness.

In the adjustment process, the plate glass is set at the set position, and then in the mold clamping process, the split molds are clamped. During this mold clamping step, the surface of the glass plate does not come into contact with the split mold, so the glass plate does not receive mold clamping pressure. Therefore, the plate glass will not be damaged during mold clamping. Finally, in the molding process, the molding material is molded into the cavity.

Moreover, the second invention operates as follows.

The distance between the insert and one of the split molds is adjusted within the split mold for insert molding. The distance is adjusted by moving the wedge member back and forth with its moving member so that the distance is slightly larger than the thickness of the glass plate. In this process, the amount of displacement of the insert is small compared to the amount of displacement of the wedge member, so it is easy to finely adjust the vertical position of the insert. It can be set to -〇-. Therefore, the plate glass will not be damaged.

(Example) Next, an example in which the book box invention and the second invention are simultaneously embodied will be described based on FIGS. 1 to 3, but first the second invention will be described.

The insert molding die 10 of this embodiment is composed of a lower mold 1 as a split mold and an upper mold 11 stacked on top of the lower mold 1, and an endless cavity C is formed between the lower mold 1 and the upper mold 11. has been done.

The lower mold 1 has a rectangular planar shape, and a triangular recess 2 is formed in the center thereof as shown by the two-dot chain line in FIG. A stepped portion 3 forming a part of the cavity C surface is provided at the peripheral shoulder portion of the recessed portion 2 .

A screw hole 5 is formed in the center of the rear part of the lower mold 1 (on the left side in FIG. 1). An adjusting screw 6 serving as a moving means is screwed into the screw hole 5, and a handle 7 for rotating the adjusting screw 6 is attached to the base end thereof.

Rod-shaped guide members 9 are provided at the four corners of the lower mold 1.
is planted, and guided by the guide member 9, the upper mold 11 is vertically stacked on the lower mold 1.

A wedge member 4 having a trapezoidal longitudinal section is provided at the bottom of the recess 2, and its front and rear end surfaces 4a, 4b and the front and rear wall surfaces 2a of the recess 2,
2b, a gap S is formed so that the wedge member 4 can move back and forth.

An enlarged diameter end portion 6a of an adjusting screw 6 screwed into the screw hole 5 is locked at the rear portion of the wedge member 4, and the handle 7
When rotated, the wedge member 4 moves back and forth. Note that a wedge member 4 whose displacement has been adjusted is attached to a portion of the adjustment screw 6 that protrudes outward from the lower die 1.
A female thread 14 is screwed together to stop the rotation of the adjustment screw 6 so that the adjustment screw 6 does not move.

A metal insert 8 whose lower surface is inclined and whose upper surface is parallel to the bottom surface of the wedge member 4 is placed on the upper surface of the wedge member 4, so that a plate glass 15 can be supported on the upper surface. The shoulder part of the insert 8 has a cutout curved surface 8 that becomes a part of the cavity C surface.
a is formed.

A recess 11a, which becomes a part of the cavity C surface, is formed in a portion of the lower surface of the upper die 11 that substantially faces the stepped portion 3. Therefore, the cavity C is this recess 11
a, the stepped portion 3, and the cutout curved surface 8a of the insert 8, the cross section is formed into an umbrella shape, and the insert 8 is held between the insert 8 and the lower surface of the center of the upper die 11 within the cavity C. The outer peripheral edge of the glass plate 15 that has been removed is inserted. The molding raw material is injected into the cavity C through a gate 12 formed on the side wall of the lower mold 1.

Next, how to implement the first invention using the apparatus of the second invention will be described.

[Measurement Step] The thickness D of the plate glass 15 is measured according to known means and techniques. In this measurement, the thickness D may be measured one by one for the glass plates 15 provided for 'tAm of the window panels, but in this embodiment, the thickness D of the glass plates 15 is measured for each roll in consideration of industrial production efficiency. is measured as a statistical value of
That value is used as the measured value X.

[Adjustment process] Loosen the female screw 14 and rotate the adjustment screw 6 of the lower die 1 to adjust the height of the insert 8. Then, the upper surface of the insert 8 and the upper mold 1
1 is set to be larger than the measured value X by a clearance α. This gap α corresponds to the variation within a lot having the measured value X, and is within the range of 0.05 to 0.1 mm for plate glass having a thickness D of 3 to 4 mm.

Tighten the female thread 14 of the adjustment screw 6 to prevent the wedge member 4 from moving.

[Setting process, mold clamping process] The relationship between the rotation angle of the adjusting screw 6 and the distance E between the upper surface of the insert 8 and the lower surface of the upper mold 11 is known in advance.

Then, the height of the insert 8 is adjusted by moving the wedge member 4 back and forth. Next, a plate glass 15 is set on the upper surface of the insert 8.

When the adjustment of the vertical position of the insert 8 is completed, the female thread 14 of the adjustment screw 6 is tightened to fix the insert 8. Lower mold 1
The upper mold 11 is guided by the guide member 9, overlapped, and clamped.

[Molding process] A molding raw material made of a soft synthetic resin is inserted into the cavity C through the gate 12 and molded. Then, the forming raw material spreads to the peripheral edge of the glass plate 15, and as shown in FIG. 3, a window panel 20 is obtained in which the weather strip 19 as a molded body is integrally joined to the peripheral edge of the glass plate 15.

Next, the functions and effects of this embodiment will be explained.

By measuring the thickness D of the plate glass 15 and rotating the wedge member 4, the insert 8 is placed at a lower position that is lower than the height of the lower surface of the upper die 11 by a length equal to the thickness D plus the gap α.
Set the nest 8 so that the top surface of the nest 8 is
Since the glass plate 15 is placed on top, the glass plate 15 is not subjected to mold clamping pressure even when the mold is clamped. Therefore,
The plate glass 15 is not damaged during mold clamping.

The thickness D of the plate glass 15 is statistically measured for each lot,
Even if the present invention is carried out based on the measurement results, damage to the glass plate 15 during mold clamping can be minimized if the gap α is made slightly larger in consideration of safety. As a result, productivity in the manufacturing process of the window panel 20 can be improved.

Furthermore, if there is variation between lots, the set position of the insert 8 can be changed depending on the variation, unlike the conventional technology. Therefore, the original name is plate glass 15
It is possible to eliminate or significantly reduce damage to the material, and also eliminate the occurrence of paris.

The present invention is not limited to the above embodiments, and can be implemented, for example, in the following embodiments.

(1) As shown in FIG.
It can be counted by 1.

Then, the relationship between the count number and the distance between the lower surface of the upper die 11 and the upper surface of the insert 8 can be grasped, and the set position of the insert 8 can be adjusted based on the count number.

(2) Furthermore, as shown in FIG. 5, the thickness D of the glass plate 15 can be measured using an electronic micrometer 16, and the measurement results can be stored in the microcomputer 17. Then, the microcomputer 17 controls the rotation of the step motor 22 to move the wedge member 4 back and forth, and inserts the corresponding plate glass 15 into the insert molding die 1.
Can be set to 0.

(3) In addition to the aspect in which the split molds 1.11 of the insert molding die 10 are made into an upper mold and a lower mold, they can be made into a horizontal mold in which one of the molds moves in the left-right direction. Further, the upper mold can be a movable mold and the lower mold can be a fixed mold, and furthermore, they can be reversed.

Effects of the Invention As detailed above, when the book box-invention is clamped, the plate glass set in the insert mold hardly contacts the split mold, so no clamping pressure is applied to the plate glass. It exhibits the excellent effect of not causing breakage of the plate glass.

In the second invention, since the insert supporting the plate glass is made movable by the wedge member, the plate glass is placed inside the split mold so that the glass plate set in the insert mold does not come into contact with the split mold when the mold is clamped. It has an excellent effect of being able to be set. As a result, the device of the second invention has a bookcase.
It can be effectively used to implement the invented method. Furthermore, in the second invention, after the mold is clamped, the plate glass is brought into contact with the split mold, and then insert molding can be performed, so that the molded product does not have any cracks.

[Brief explanation of drawings]

Fig. 1 is a partial longitudinal sectional view of the embodiment, Fig. 2 is a plan view of the lower mold, Fig. 3 is a sectional view of the window panel, and Fig. 4 shows a device for setting the displacement amount of the wedge member. FIG. 5 is a partial cross-sectional view showing how the device for displacing the wedge member is assembled;
Figure 6 is a partial cross-sectional view of a conventional insert molding die;
The figure is an enlarged view of the VI portion in FIG. Pattern member 4, moving means 6, insert 8, split mold 1.11, plate glass 15, molded body 19, window panel 20, thickness of cavity C1.

Claims (1)

[Claims] 1. A measuring step of measuring the thickness (D) of the plate glass (15), an insert (8) provided between the split molds (1, 11) for insert molding, and the step of measuring the thickness (D) of the plate glass (15); an adjustment step of adjusting the distance (L) between one of the molds (1, 11) to be slightly larger than the thickness (D); a setting process of setting a plate glass (15), a mold clamping process of clamping the split molds (1, 11), and insert molding of a forming raw material into a cavity (C) in the split molds (1, 11). and a forming step of obtaining a window panel (20) in which the molded body (19) is integrally joined to the peripheral edge of the plate glass (15). 2. Between the split molds (1, 11) for insert molding rubber or soft synthetic resin on the peripheral edge of the plate glass (15),
A wedge member (4) and an insert (8) in contact with the wedge member (4) are provided, and a mold (11) on the insert (8) side of the split molds (1, 11) and the insert Moving means (6) for moving the wedge member (4) so that the distance between the wedge member (8) and the wedge member (4) changes.
) is provided on the split mold (1, 11). 3. The window panel manufacturing apparatus according to claim 2, wherein the split molds (1, 11) consist of a lower mold and an upper mold stacked on top of the lower mold.