JPH0530772B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for forming curved glass sheets, such as automobile window glasses.

(Prior Art) Various molding devices have been proposed as devices for manufacturing automobile window glasses.

For example, the device disclosed in Japanese Patent Publication No. 46-13272 is
The plate glass heated to near its softening point is conveyed to the upper part of the ring mold by a conveyor roller.Then, the ring mold is raised above the conveyor roller, and the plate glass is lifted from the conveyor roller, and the gravitational and inertial forces during lifting are applied. It was designed to bend and form plate glass.
The device disclosed in No. 12931 is the device disclosed in Japanese Patent Publication No. 46-13272 with a quenching device added to perform quenching and strengthening at the same time as bending.
Further, the device disclosed in Japanese Patent Publication No. 59-3939 has a double supporting frame type ring of plate glass, the outer ring is coated with a heat insulating material, and the inner ring is comb-shaped.
First, the outer ring receives the plate glass, and then the inner ring receives the plate glass and raises it.

If the above-mentioned conventional apparatus is concretely illustrated, it becomes a molding apparatus as shown in FIG.

That is, a recess 103 is formed in the ring mold 101 for forming the peripheral edge of the plate glass so as not to interfere with the conveyance roller when the ring mold rises.
A ring mold 101 is raised to press plate glass sent by a conveying roller between gravity and inertia or an upper mold.

(Problems to be Solved by the Invention) In the above-mentioned device, the ring mold 10
1 is formed with a recess 103, and when the ring mold 101 is used to hold the peripheral edge of the glass plate G as shown in FIG. When the glass plate G is press-molded between the parts, as shown in FIG.
4... occurs.

In addition, not only the device shown in FIG. 7 but also conventional devices have a concave portion formed in the member corresponding to the ring mold to prevent interference with the conveyance roller. occurs.

(Means for Solving the Problems) In order to solve the above problems, the present invention arranges a ring mold above the conveyance roller, configures this ring mold with a plurality of divided bodies, and each divided body movable toward the outside and inside of the molding part,
Each divided body is moved outward and expanded and separated, and then the plate glass is picked up from the conveyance roller by an auxiliary ring mold, and each divided body is moved inward to unite each divided body to form a ring mold. At the same time, the peripheral edge of the plate glass taken up from the conveyance roller was held and press-formed between it and the upper die.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall front view of a plate glass press forming apparatus according to the present invention, and FIG. 2 is a side view of the same forming apparatus.

The forming apparatus 1 is provided adjacent to a heating furnace 2, and within the heating furnace 2, conveyance rollers 3 for transporting heated plate glass G to the forming apparatus 1 are provided.

On the other hand, the forming apparatus 1 has horizontal frames 5 and 6 installed above and below a frame-like frame 4, an upper die 7 is fixed to the upper horizontal frame 5, and a lower horizontal frame 6 is connected to the conveying direction of the plate glass G. It rotatably supports conveyance rollers 8 whose axes are perpendicular to each other.

The frame 4 is erected on a base 9, and a cylinder unit 10 is fixed to the base 9 with its axis facing upward, and the cylinder unit 11 is used to move the lower mold 12 up and down. ing. A flange portion 13 is provided at the lower end of the lower mold 12 , and an auxiliary ring mold 15 disposed around the lower mold 12 is connected to the lower mold 12 by cylinder units 14 , 14 erected on the flange portion 13 . It can be raised and lowered separately.

The specific structures of the lower mold 12 and the auxiliary ring mold 15 are as shown in FIG. That is, lower mold 1
2 has a hollow interior, and almost the entire upper surface is a molding surface, and nozzle holes 16 are formed in the molding surface for blowing out the cooling air introduced inside. A felt-like heat insulating material 17 made of fiber as a base material mixed with other fibers is applied, and vertical grooves 18 that open upward are formed in areas that do not interfere with the nozzle holes 16. , the conveyance roller 8 and the lower mold 12 are prevented from coming into contact with each other when the lower mold 12 rises.

Further, brackets 19 are fixed to the side surfaces of the lower mold 12, and the guide rods 20 attached to the auxiliary ring mold 15 are inserted into these brackets 19, and when the auxiliary ring mold 15 moves up and down by the operation of the cylinder units 14... A constant gap is always maintained between the lower mold 12 and the auxiliary ring mold 15. The auxiliary ring mold 15 is also formed with recesses 21 to prevent it from interfering with the conveying roller 8 when raised.

On the other hand, in the molding part S formed between the upper mold 7 and the lower mold 12 and above the conveyance roller 8, there is a ring mold 2 for molding the peripheral edge of the plate glass G.
2 are arranged. This ring mold 22 is composed of a plurality of divided bodies 22a, and the entire body is moved up and down by an elevating mechanism, and each divided body 22a is moved outward and inward of the molding part S by a moving mechanism. It's starting to move.

The specific structure will be explained based on FIG. 4, which is an enlarged front view of the upper part of the molding apparatus, and FIG. 5, which is an enlarged side view of the upper part of the molding apparatus.

A cylinder unit 23 is fixed to a frame 4a forming the upper end of the frame 4 so that its shaft 23a projects downward, and an elevating plate 25 is attached to the lower end of this shaft 23a via a joint member 24. There is. This elevating plate 25 is connected to the cylinder unit 23 and is also attached to the frame 4a by a cross-shaped support link 26.

Supports 27 are erected on the elevating plate 25. A total of four columns 27 are provided spaced apart from each other in the left-right direction and front-rear direction, and rail members 28, 28 are fixed to the columns 27, 27 (see FIG. 5), which are spaced apart in the front-rear direction, respectively, and the columns 2
Install the horizontal frame 29 between the upper ends of 7 and 27,
The cylinder unit 30 is installed horizontally on this horizontal frame, and the shaft 30 of this cylinder unit 30 is
a and lifting members 31, 31 engaged with the rail members 28, 28 are connected via links 32, 32. By operating the cylinder unit 30, the elevating members 31, 31 move up and down along the rail members 28, 28.

Also, columns 27, 27 (fourth
Between the lifting members 31 and 31 that engage with the
The shaft 33 is inserted so as to be slidable in the left and right direction.
Hanging members 34, 34 are attached to portions that protrude outward from the lifting members 31, 31 of No. 3.
These hanging members 34 are provided on two shafts 33 extending in the left-right direction, two in total, four in total, and are spaced apart from each other in the front and rear (see FIG. 5).
An angular rod 35 is inserted between the lower ends of the angular rod 35, and hanging members 36, 36 are attached to the angular rod 35.
Cylinder units 37, 37 are fixed to the lower ends of the hanging members 36, 36, and the divided body 22a constituting the ring mold 22 is tied to the rod tips of the cylinder units 37, 37. Further, as shown in FIG. 4, a pair of the square rods 35 are provided spaced apart from each other in the left and right direction, and other square rods 38, 38 are provided between both ends of these square rods 35, 35.
are attached, and hanging members 39, 39 are attached to each square rod 38. Cylinder units 40, 40 are fixedly attached to these hanging members 39, 39, and the rod tips of the cylinder units 40, 40 are fixed. A separate divided body 22a that constitutes the ring mold 22 is bonded to the ring mold 22.

To briefly explain the above, in the molding part S, square rods 35, 35 spaced apart in the front-rear direction and square rods 38, 38 spaced apart in the left-right direction are arranged so as to form a rectangular shape when viewed from above. , two hanging members are provided on each square rod, and each of the divided bodies 22a constituting the ring mold 22 is supported one by one by the cylinder unit provided on the two hanging members forming a pair. There is. Therefore, each divided body 2
2a can be moved individually by operating a cylinder unit inward or outward of the molded part S, and by moving each divided body 22a inward, each divided body 22a... is combined. The ring mold 22 becomes a continuous ring mold 22, and as each divided body 22a moves outward, each divided body 22a... is separated, and the plate glass G is placed above each divided body 22a without interfering with each divided body 22a... It becomes possible to move to.

Further, each divided body 22a is connected to the cylinder unit 3.
7 and 40 to the square rods 35 and 38, the square rods 35 and 38 are connected to the shaft 33, and the shaft 33 is attached to the lifting plate 25 via the lifting member 31, so that the cylinder unit 23, each divided body 22a moves up and down at the same time. Further, since the elevating members 31, 31 are connected to the cylinder unit 30 via the link 32, each divided body 22a moves up and down independently of the elevating plate 25 by operating the cylinder unit 30.

On the other hand, as shown in FIG. 4, a support plate 41 is provided on the elevating plate 25, a motor 42 is attached to this support plate 41, and the drive shaft of this motor 42 and the shaft 33 are connected via a cam mechanism 43. There is. This cam mechanism 43 converts the rotational motion of the drive shaft into a reciprocating linear motion. By driving the motor 42, the shaft 33 makes a reciprocating linear motion in the left-right direction in FIG.
3, square rods 35, 38, hanging member 36,
39 and the divided bodies 22a supported through the cylinder units 37, 40 also make reciprocating linear motion.

A method of bending and forming plate glass G using the forming apparatus 1 configured as described above will be explained with reference to FIG. 6 as well.

First, the plate glass G heated to near its softening point in the heating furnace 2 is transferred via the conveying rollers 3 and 8 to above the lower die 12 of the forming section as shown in FIG. 6A.

Next, the cylinder units 10 and 14 are operated to raise the lower mold 12 and the auxiliary ring mold 15, and the auxiliary ring mold 1 is raised as shown in FIG. 6B.
5 supports the lower peripheral edge of the glass plate G, and lifts the glass plate G from the conveyance roller 8 as the auxiliary ring mold 15 rises.

After this, the lower mold 12 and the auxiliary ring mold 15
continues to rise, and with each divided body 22a separated from each other, the cylinder unit 23 is operated to lower each divided body 22a, and as shown in FIG. The plate glass G is raised to a position slightly above the divided body through the space.

When the plate glass G has risen to the position shown in FIG. The ring mold 22 is formed by moving the ring mold 22 inward and combining the divided bodies 22a. Then, the upper end of the ring mold 22 supports the lower peripheral edge of the glass plate G. Thereafter, as shown in FIG. 6D, only the auxiliary ring mold 15 is lowered.

Then, as shown in FIG. 6E, the ring mold 22 and the lower mold 12 are raised, and the sheet glass G is press-bent formed between the upper mold 7 and the lower mold 12 and the ring mold 12. 22 is lowered as shown in FIG. 6F.

Here, the cylinder unit 30 is used to lower the ring mold 22 after molding.
That is, in this embodiment, the cylinder unit 3
0, the ring mold 22 is lowered, and the lowering amount is half of the lowering amount of the lower mold 12. Specifically, when the lower mold 12 is lowered by 50 mm after molding, the ring mold 22 is lowered by 25 mm, and a gap of 25 mm is formed between the plate glass G and the lower surface of the upper mold 7 and the upper surface of the lower mold 12. do it like this.

Thereafter, by driving the motor 42, the ring mold 22 and the plate glass G placed on the ring mold 22 are linearly reciprocated (oscillated), and the lower surface of the upper mold 7 and the lower mold 1 are moved.
2. Cooling air is blown onto the surface of the glass plate G from a nozzle hole formed on the upper surface to uniformly cool and strengthen the glass plate G.

Thereafter, the plate glass G is placed on the lower die 12, and the lower die 12 is lowered, and the plate glass G is transferred onto the conveyance roller 8, and carried out by the conveyance roller 8 to the next process.

In addition, in the illustrated example, the auxiliary ring mold 1
In step 5, the plate glass G is taken up from the conveyance roller 8, but the plate glass G may be taken up by the lower die 12. In this case, the auxiliary ring mold 15 becomes unnecessary.

(Effects of the Invention) As explained above, according to the present invention, a ring mold made up of a plurality of divided bodies is arranged above the transport roller, and the auxiliary ring mold arranged around the lower mold is used to control the transport roller. The plate glass taken up from the glass is received by the ring mold in which each divided body is combined, and press-formed between it and the upper mold in this state, so the ring mold has a recess to avoid interference with the conveyance roller. Since there is no need for molding, the entire circumference of the plate glass can be molded using a ring mold, and optical distortion does not occur at the peripheral edge of the plate glass after molding as in the conventional method.

Therefore, when used as an automobile window glass, etc., there is no optical distortion at the peripheral edge, so it exhibits many effects such as ensuring extremely good visibility.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of the press forming apparatus according to the present invention, FIG. 2 is an overall side view of the press forming apparatus,
Figure 3 is a perspective view of the lower mold, Figure 4 is an enlarged front view of the upper part of the molding apparatus, Figure 5 is an enlarged side view of the upper part of the molding apparatus, and Figures 6 A to F show the operation of the press molding apparatus in the order of steps. 7 is a perspective view showing a part of a conventional molding device, FIG. 8 is a diagram showing a forming state by the conventional device, and FIG. 9 is a part of a plate glass formed by the conventional device. FIG. In addition, in the drawing, 1 is a press molding device, 2 is a heating furnace,
7 is an upper mold, 8 is a conveyance roller, 12 is a lower mold, 15 is an auxiliary ring mold, 18 is a groove, 21 is a recess,
22 is a ring mold, 22a is a divided body constituting the ring mold, 23, 30, 37, 40 are cylinder units, 33 is a shaft, 35, 38 are square rods, 36, 39 are hanging members, 42 is for oscillation. motor.

Claims (1)

[Claims] 1. A plate glass heated in a heating furnace to near its softening point is transferred in a horizontal state to a forming section between an upper mold and a lower mold by conveying rollers, and is bent and formed between the upper mold and lower mold. In the molding apparatus, an auxiliary ring mold placed around the lower mold is placed above the transport roller in the molding section to hold the peripheral edge of the glass sheet lifted from the transport roller, and also to hold the peripheral edge of the glass sheet lifted from the transport roller. A ring mold for forming the peripheral edge of the plate glass is provided. A plate glass press molding apparatus characterized in that each divided body separates by moving inward, and unites by moving inward to form a ring mold.