JPS62251113A - Manufacture and device fof window panel - Google Patents

Abstract

PURPOSE:To reduce the number of broken sheet glasses to none or to a marked extent and eliminate flashes by setting a sheet glass by means of preparing the interval of core provided between split cavity molds for molding inserts and the split cavity molds more than the thickness of sheet glass, clamping, contacting the sheet glass with a mold on one side, and insert molding raw material for molding in the cavity of the inside of the insert mold. CONSTITUTION:On the upper face of a core 8 set in a position lower than the height that the thickness D of sheet glass 15 and maximum clearance alphaare deducted from the contacting face of a top force 11 and a bottom force 1, a sheet glass 15 is placed on which the top force 11 is piled up and clamped. By actuating a hydraulic unit and adjusting a pressure regulating valve, a section 9a is gradually pressurized to raise up the core 8 within a range of clearance and the sheet glass 15 on the core 8 contacts the top force 11. Thus, a window panel 16 constituted with non-rigid synthetic resin being insert molded in the cavity C and weatherstrip 14 bonded integrally on the edge of plate glass 15 is obtained.

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 plate glass 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 periphery 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. 5, if the distance is smaller than the thickness D of the glass plate 51, the entire surface of the glass plate 51 will be subjected to mold clamping pressure during mold clamping, causing a problem that the glass plate 51 will be 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 mold device that does not cause damage to a glass plate.

Structure of the Invention (Means for Solving the Problems) The distance between the insert provided between the split molds for insert molding and one of the split molds is set to a plate glass for forming a window panel. a setting process of separating the plate glass by more than the thickness of the two molds, and a mold clamping process of clamping the split mold, and moving the insert to apply a predetermined pressure to the glass plate to one of the molds. A method consisting of a contacting step of making contact with the glass plate, and a molding step of insert-molding the molding raw material into a cavity in the insert mold to obtain a window panel in which the molded body is integrally joined to the peripheral edge of the sheet glass. By employing this, the object of the first invention is achieved.

In addition, it is technically possible to provide an insert for supporting the plate glass and a fluid displacement means for displacing the insert in a split mold for insert molding for insert molding rubber or soft synthetic resin on the peripheral edge of the plate glass. By employing these means, the object of the second invention is achieved.

(effect) The first invention operates as follows.

In the setting step, the space between the insert provided between the split molds for insert molding and one of the split molds is set to be greater than the thickness of the glass plate for forming the window panel. After the plate glass is set during the mold clamping process, the split molds are clamped. When the glass plate is moved toward the insert and the one mold is moved and the mold is clamped, the glass plate is not subjected to mold clamping pressure. Therefore, the plate glass will not be damaged during mold clamping.

Next, in the abutting step, when the glass plate is brought into contact with the one mold under a predetermined pressure, no gap is created between the mold and the glass plate, so that no cracks are generated in the molded product.

Moreover, no breakage of the plate glass occurs in this process.

Finally, in the molding step, the molding raw material is insert-molded into the cavity in the split mold.

Moreover, the second invention operates as follows.

A plate glass is set between a nest provided in the split mold and one of the split molds. At this time, the distance between them is set at a distance greater than the thickness of the glass plate. Place the plate glass on the nesting side and tighten the mold. At this time, no mold clamping pressure is applied to the glass plate, and therefore mold clamping in which clamping pressure is applied to the glass plate is avoided. Next, when the fluid displacement means is actuated to bring the glass plate into contact with the one mold under a predetermined pressure, the glass plate will not be damaged and no gap will form between the two molds.

(Example) Next, an example in which the present 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 example consists of a split mold,
The split mold is composed of a lower mold 1 and an upper mold 11 stacked thereon. An endless cavity C is formed between the lower mold 1 and the upper mold 11.

The lower mold 1 includes a lower mold base 4 having a rectangular planar shape;
The lower mold body 5 is fixed onto the lower mold base 4 with bolts 7.

A cylinder chamber 4a is formed in the center of the lower die base 4 and is open to the upper surface side, and the cylinder chamber 4a communicates with an externally provided hydraulic system (not shown) via a path 4b.

A pressure receiving body 9 having a concave pressure receiving portion 9a on its lower surface is fitted into the cylinder chamber 4a as a fluid displacement means.

An O-ring chamber 9b is provided on the circumferential surface of the pressure-receiving body 9, and an O-ring 13 for preventing oil from leaking from the cylinder chamber 4a is provided in the O-ring chamber 9b.

A triangular through hole 2 is formed in the center of the lower mold main body 5 and extends vertically (see Fig. 2). An upper notch 3a and a lower notch 3b are formed so as to widen.

A insert 8 is fitted into the through hole 2 to support the glass plate 15 from below. A cutout curved surface 8a that constitutes a part of the cavity C surface is formed on the shoulder of this insert 8.
Further, a protrusion 8b that fits into the lower notch 3b is formed at the lower peripheral edge thereof. The insert 8 can move up and down within the range of the vertical difference (hereinafter referred to as gap α) between the lower surface of the lower notch 3b and the upper surface of the protrusion 8b.

In addition, rod-shaped guide members 6 are implanted in each of the four corner parts of the lower mold 1, and the upper mold 11 is guided by the guide members 6 and placed over the lower mold 1 in the vertical direction. It looks like this.

On the lower surface of the upper mold 11, a recess 1 that becomes a part of the cavity C surface is provided in a portion substantially opposite to the upper step portion 3a.
1a is formed. Therefore, the cavity C is formed into an umbrella-like cross section by the recessed portion 11a, the upper step portion 3a, and the cutout curved surface 8a of the insert 8, and the insert 8 and the upper mold are placed in the cavity C. The outer periphery of the glass plate 15 sandwiched between the central lower surface of the glass plate 11 and the lower surface of the glass plate 11 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 body 5.

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

Set process, mold clamping process] The upper surface of the insert 8 is located at a position lower than the height obtained by subtracting the thickness D of the plate glass 15 and the maximum clearance α from the contact surface between the upper mold 11 and the lower mold 1. Set nest 8.

Therefore, even if the plate glass has a thickness that exceeds the range of variation in industrial production, the thickness of the plate glass 1
5 is set on the insert 8, the plate glass 15
This position is considered to be a safe position where the upper surface will not come into contact with the lower surface of the upper mold 11 and cause damage to the glass plate 15. Next, a plate glass 15 is placed on the upper surface of the insert 8. The upper mold 11 is guided by the guide member 6 and stacked on the lower mold 1, and the molds are clamped.

[By operating a hydraulic device provided outside the contact process and adjusting the opening degree of a pressure regulating valve (not shown) provided in the middle of the yarn path 4b, pressure is gradually applied to the pressure receiving portion 9a of the pressure receiving body 9. A predetermined pressure is applied and the pressure receiving body 9 is slowly raised. Then, the insert 8 rises within the range of clearance α, and the upper surface of the glass plate 15 on the insert 8 comes into contact with the lower surface of the upper mold 11.

Molding Step] 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 16 is obtained in which the weather strip 14 as a molded body is integrally joined to the peripheral edge of the glass plate 150.

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

Since the position of the insert 8 is set to be lower than the height of the upper surface of the insert 8, which is lower than the height of the lower surface of the upper mold 11 minus the thickness D of the plate glass 15 and the gap α, Even if a glass plate 15 is placed on the insert 8 and the mold is roughly clamped, the glass plate 15 is not subjected to mold clamping pressure.

Therefore, if the gap α is set large considering the maximum variation and safety of the glass plate 15, there is no need to measure the thickness D of the glass plate 15 each time insert molding is performed, and after setting the glass plate 15 in the insert molding die 10, Even when the mold is clamped, the plate glass 15 is not damaged. Therefore, as long as the plate glass 15 has a thickness D controlled within a certain range, the window panel 16 can be manufactured with high efficiency without causing damage to the plate glass 15.

Moreover, since insert molding is performed with the upper surface of the glass plate 15 in contact with the lower surface of the upper mold 11, the clearance between the upper mold 11 and the glass plate 15 can be reduced, and the occurrence of flash can be suppressed.

In this manner, the present invention can eliminate or significantly reduce breakage of the glass sheet 15 and 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) The fluid used in the fluid displacement means 9 may be any fluid as long as it can displace the fluid displacement means 9, such as oil, water, or air. The speed at which the fluid displacement means 9 is raised can be arbitrarily set using a pressure control valve or the like provided in the middle of the path 4b as long as the glass plate 15 does not receive a large shock when it comes into contact with the lower surface of the upper mold 11.

(2) The split mold 1.11 may consist of an upper mold and a lower mold, but may also be horizontal. The upper mold may be a fixed mold and the lower mold 1 may be a movable mold, or vice versa. Guide member 6
may be provided on either the upper mold 11 or the lower mold 1.

Effects of the Invention As detailed above, in the present invention, the plate glass is brought into contact with the split mold with a predetermined pressure regardless of the thickness of the plate glass in the insert molding state, so that no flaking occurs in the molded product. Moreover, it exhibits an excellent effect of not damaging the plate glass.

In the second invention, since the insert is displaced by the fluid displacement means, the glass plate can be brought into contact with the split mold with a predetermined pressure regardless of the thickness of the glass plate in the insert molding state. Therefore, the second invention exhibits the excellent effect of not causing paris in the molded product and not damaging the plate glass.

[Brief explanation of drawings]

Figure 1 is a partial longitudinal sectional view of the embodiment, Figure 2 is a plan view of the lower mold, Figure 3 is a sectional view of the window panel, Figure 4 is a partial sectional view of a conventional insert mold, and Figure 5. is an enlarged view of portion V in FIG. 4. Split mold 1.11, fluid displacement means 6, insert 8, molded body 14,
Plate glass 15, window panel 16, cavity C1 thickness.

Claims (1)

[Claims] 1. An insert (8) provided between split molds (1, 11) for insert molding, and one mold (11) of the split molds (1, 11). a setting step of setting a plate glass (15) between the split molds (1, 11); a contacting step of moving the insert (8) and bringing the plate glass (15) into contact with the one mold (11) at a predetermined pressure; A molding step of insert-molding a molding raw material into the cavity (C) in the glass plate (1, 11) to obtain a window panel (16) in which the molded body (14) is integrally joined to the peripheral edge of the plate glass (15). A method for manufacturing a window panel, comprising: 2. Split mold for insert molding (for insert molding rubber or soft synthetic resin on the peripheral edge of the plate glass (15)
1, 11), an insert (8) for supporting the glass plate (15) and a fluid displacement means (9) for displacing the insert (8).
) A window panel manufacturing device characterized by being provided with. 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 the lower mold.