JPH0465026B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to the manufacturing process of laminated glass, which is often used for vehicles, architecture, etc. The present invention relates to a method and apparatus for cutting and removing a portion.

(Prior art) Laminated glass is made by interposing an interlayer film such as polyvinyl butyral cut into a shape slightly larger than the sheet glass between two sheets of glass that have been processed into a desired shape and size, and then forming a layer from the area of the sheet glass. It is manufactured by cutting off the protruding end of the interlayer film, temporarily press-bonding it, and then autoclaving it.

As a device for automatically cutting and removing such an end portion of the interlayer film, there is an endless strip cutting device as disclosed in, for example, JP-A-59-3052 and JP-A-60-34298 published by the present applicant. It is known that the blade is rotated continuously.

(Problems with the prior art) In these conventional technologies, when the endless band-shaped cutting blade comes into contact with the glass periphery, cracks and chips occur in the glass, and when a gap is provided between the glass periphery and the glass periphery to prevent this, cutting occurs. Because the blade always rotates in one direction, the flexible interlayer film stretches along the direction of rotation, making it difficult to cut sharply along the periphery of the glass, sometimes resulting in poor cutting. Further, there may be a problem that chips are generated during cutting and tend to adhere to the glass.

On the other hand, regarding film cutting using ultrasonic cutter knife vibration, for example,
No. 99600 discloses that a flexible stacked sheet (film) is placed on a support stand, and a cutter knife is driven vertically and applied ultrasonic vibration to run and cut the sheet while holding it down with a presser foot. .

However, when used for cutting the edge of a laminated interlayer film,
In order to reliably place the end of the interlayer film interposed on a plate glass with a three-dimensional curved surface, such as an automobile window glass, on a support base, it is necessary to match the shape of the support base. It is not easy to adapt. Of course, it is also not easy to press the film with the corresponding presser legs, and on the other hand, without these parts, the vertical movement of the cutter knife tends to cause the ends of the film to wave up and down, making it difficult to cut, and furthermore, the cut film becomes wavy. Problems such as the end tying to the cutter knife or sticking to the glass cannot be resolved.

The present invention was completed after intensive studies to solve these problems.

(Means for Solving Problems) The present invention provides a method for cutting and removing an end of an interlayer film that is interposed between two glass plates and protrudes from the periphery of the glass plate by running a cutter knife along the peripheral edge of the glass plate. , a cutter knife is brought close to the periphery of the plate glass, and the cutter knife is caused to run along the length of the knife edge while applying ultrasonic vibrations at a frequency of 20 to 40 KHz and an amplitude of 20 to 60 μm, and the intermediate film. A device for cutting and removing edges, which includes a cutter knife that vibrates slightly along the length of the knife edge using an ultrasonic oscillator as a driving source, and a fin-like member for preventing drooping of the end of the interlayer film near the lower part of the outer surface of the cutter knife. In addition, a box-like body for temporarily storing the interlayer film end, which has a receiving opening for the cut end of the interlayer film adjacent to the cutter knife and a lower lid for discharging, is installed, and a pair of boxes are placed in parallel below the receiving opening for the cut end of the interlayer film. The apparatus includes a frame supporting discharge rolls, and the discharge rolls rotate in opposition to each other and are drive-adjustable so as to move toward and away from each other.

In the present invention, the following method is employed to cut the end portion of the interlayer film.

Although the shape and dimensions of the cutter knife are not specified,
Rectangular shape with a knife edge on one side and length 20
~30mm, width 4~6mm, thickness 0.3~0.6mm is suitable, and the material is carbon tool steel SK, for example.
-2 can be recommended.

To run a cutter knife close to each other without making them come into contact when running a cutter knife along the peripheral edge of a plate glass.

When the two come into contact, significant frictional heat is generated, which can damage the knife or chip the glass.
Therefore, if a space of about 0.5 mm is provided with a safety factor in mind, such a problem will not occur.

On the other hand, if the distance is 10 mm or more, the interlayer film is separated from the edge of the glass, which is a drawback, and excessive runout tends to occur, and sharp cutting becomes difficult. Furthermore, during autoclave treatment after cutting, the intermediate film protrusion sticks to the end surface of the glass, making it difficult to remove it.

The cutter knife may be parallel to the periphery of the glass over its width, but preferably the front edge of the knife is close to the periphery of the glass, while the rear end is slightly spaced apart. By doing this, the cut ends of the interlayer film are pushed outward, making it difficult for the interlayer film to get entangled with the knife or glass. However, it is preferable that the angle of inclination be within 20°. If the angle exceeds the above range, the resistance of the film to the running of the cutter knife will increase significantly, the knife will overheat and cause abnormal vibrations, making it easy to break and affecting the cutting efficiency.

The cutter knife uses an ultrasonic generator to generate vibrations.
Ultrasonic vibration is applied along the length of the knife edge in the range of 20 to 40 KHz, and the amplitude is in the range of 20 to 60 μm. If the frequency is higher than the above range, the cutting edge and the intermediate film cutting portion will overheat, and the intermediate film will be likely to be welded to the cutting edge, glass, etc. On the other hand, if it is smaller than the above range, sharp cutting becomes difficult and the interlayer film cutting line is likely to be disturbed. The swing width correlates with the frequency, and if it is smaller than the range, it will be difficult to cut sharply,
The interlayer film tends to run out, and if it is larger than the above range, the cutting edge and the cutting part of the interlayer film will overheat, and the interlayer film will tend to weld to the cutting edge, glass, etc.

Furthermore, in order to perform efficient cutting, it is preferable that the frequency x amplitude be in the range of 700 to 1800 KHz·μm. Within this range, sharp and smooth cutting can be performed without problems such as damage to the knife, even if the cutter speed exceeds 500 mm/sec and maximum 1000 mm/sec when cutting polyvinyl butyral film, for example.

When adopting and carrying out such a method, in order to cause the cutting device to travel along a predetermined trajectory around the peripheral edge of the sheet glass, a traveling trajectory is programmed into a computer in advance, and when cutting, x, The vehicle is made to travel in three-dimensional directions along the y and z axes.

According to the cutter knife according to the present invention, unlike conventionally known endless belt-shaped blades in which the cutting edge always rotates in one direction, by applying ultrasonic vibration, elongation of the interlayer film and cutting that sometimes occurs can be avoided. It is possible to eliminate all defects.

Furthermore, in consideration of the case where the end of the interlayer film protrudes greatly and hangs during cutting, it has the function of supporting the end of the interlayer film, and the ribbon-shaped end of the interlayer film after cutting adheres to the periphery of the glass. In order to prevent the interlayer films from binding together, a fin-like member is attached that has the function of guiding the end portion of the interlayer film in a direction away from the periphery of the glass.

The present invention will be explained in detail with reference to Examples below.

(Example) FIG. 1 is an overall schematic perspective view according to the present invention.
The plate glass 2 with the interlayer film 1 interposed therebetween is transferred and positioned by a conveyor, and is placed on four vertically movable columns 3 each having a suction pad (not shown) at the upper end.
3. It is lifted up and placed at a predetermined height.

On the other hand, above, a rod 7 is installed on the horizontal frames 6, 6 of a frame 5 having four supports 4, 4, . . . so as to be slidable in the x-axis direction shown in the figure. show y
A cutting machine 9 is installed via a vertical rod 8 vertically installed so as to be slidable in the axial direction. In addition, the connecting rod 10 at the bottom of the vertical rod 8
can be freely moved up and down in the z-axis direction shown in the figure, and can be rotated horizontally. That is, the cutting machine 9 connected to the connecting rod 10 is moved three-dimensionally along the periphery of the curved plate glass.

For example, to move the rod 7 in the x-axis direction, a roller (not shown) is fixed to the rotating shaft of the motor M1, and a rail 6' is attached to the horizontal frame 6, and the roller engaged with the rail is slid. Alternatively, a pinion-rack mechanism may be used in which rollers are replaced with pinions and rails are replaced with racks.

Using the same mechanism as described above, the motor M2 moves the vertical rod 8 in the y-axis direction, and the motor M3 moves the connecting rod 10 up and down in the z-axis direction.

Further, although not shown, a motor may be attached to the connecting rod 10, a bevel gear mechanism may be provided on its horizontal shaft, and a cutting machine 9 may be connected to the other vertical shaft to horizontally rotate the motor.

Alternatively, if a tilting mechanism for the cutting machine 9 is appropriately provided on the connecting rod 10 and the mechanism is tilted, a desired cut surface can be obtained.

As shown in FIG. 2, the cutting machine 9 includes a cutter knife 11 and an ultrasonic generator 12 that applies ultrasonic vibrations along the length of the knife edge. As mentioned above, ultrasonic vibration is applied at a frequency of 20 to 60 KHz and an amplitude of 20 to 40 μm. For example, at a frequency of 40 KHz and a width of 30 μm, a cutter running speed of 700 mm/sec or more is provided, making it smooth and sharp. allows for precise cutting. A fin-like member 14 is attached to the cutting machine 9 to prevent the end portion of the interlayer film from drooping during cutting.

The fin-like member 14 is attached to the upper surface 1 as shown in FIG. 3A.
5 has a fin shape that is tapered in the running direction and widened at the rear, so that the end portion of the interlayer film cut into a ribbon shape after cutting is attached to the outer side 1 of the fin-like member 14.
6 in a direction away from the periphery of the glass plate and hangs down. That is, the fin-like member 14 has the function of preventing the end portion of the interlayer film from swinging downward when cutting it, and is also spaced apart so that it does not wrap around the cutter knife 11 attached to the periphery of the glass plate after being cut. It has an effect.

FIGS. 3B and 3C show an improved shape of the fin-like member 14, in which the top end 17 is placed close to the peripheral area of the lower plate glass surface, so that the end of the interlayer film just before cutting can be held against the cutter knife. Keep it vertical to make cutting easier.

The fin-like members 14 are made of a non-adhesive and slippery material, such as Teflon, in order to prevent the interlayer film 1 from sticking or getting stuck.

Note that when cutting with a cutter knife from the edge of the interlayer film at the beginning of cutting, for example, at the start, the interlayer film tends to swing up and down regardless of the regulation of the frequency and amplitude of the ultrasonic waves.

The downward swing can be suppressed by the fin-like member 14. On the other hand, upward deflection can be suppressed by providing the holding plate 13 in advance.

Also, at the corners of the glass plate, the interlayer film tends to swing up and down as the cutter knife changes its running direction and speed, and the holding plate 13 and the fin-like members 14 effectively act to suppress this.

Further, the cut end portion 1' of the interlayer film is temporarily stored in a box-shaped body 18 attached to the cutting machine 9 shown in the side view of FIG. The box-like body 18 has a lower lid 19 that can be opened and closed, and after the cutting of the intermediate film is completed or when the box-like body 18 is full, the end portion 1' of the intermediate film is closed to the lower lid 19. By opening it, it falls onto the belt conveyor 20, for example, and is discharged outdoors.

Note that the interlayer film may sometimes get stuck to the side walls of the box-like body 18 depending on the material of the interlayer film or the type of additives, and a vibrator is installed in the box-like body 18 to forcefully remove this. A pair of discharge rolls 21 and 21' are provided below the box-like body 18, although there are other means to attach the rolls.

That is, as shown in the drawing, the discharge roll 21,
21' is arranged in a frame 22 that is integrated below the box-like body 18 and has openings at the top and bottom, and when the bottom cover 19 of the box-like body is opened, the discharge roll 21 is clockwise driven by a drive source (not shown). 21' counterclockwise, and turn the air cylinder 2
By driving the shafts 3 and 23', the distance between the rolls is gradually narrowed along the slit 24 to ensure that the remaining interlayer film is sandwiched and discharged downward, and as appropriate, the belt conveyor 20 provided below is discharged outdoors as described above. .

The lower lid 19 of the box-like body 18 may be opened and closed by rotating the rods 25a and 25b about the axis 26 by driving the shaft of the air cylinder 25.

Note that instead of the belt conveyor, an appropriate outdoor discharge means may be employed, such as providing an outdoor discharge chute hole in the floor surface.

In addition, various safety measures are provided, such as attaching a photoelectric fiber sensor to the area adjacent to the cutter knife 11 of the fin-like member 14 to detect breakage of the cutter knife and stopping the device, and a photoelectric detection tube is provided to the frame 22 to prevent the remaining intermediate. Of course, various operation confirmation means such as confirmation of the presence or absence of a membrane may be optionally provided.

To operate the apparatus according to the present invention, first, a plate glass with an interlayer film interposed therebetween is placed in a predetermined position. On the other hand, a cutting device placed at a predetermined location is driven and driven based on a computer program to gradually cut from the periphery of the interlayer film toward the periphery of the glass, and when it approaches the periphery of the plate glass, it cuts along the planned line of the glass periphery. The edges of the interlayer film are successively cut by running at a speed of, for example, 700 mm/sec at the edges of the glass and 100 mm/sec at the corners, and the cutter knife goes around the periphery of the glass to cut the edges of the interlayer film. are separated and temporarily stored in a box-like body attached to the building. Furthermore, when the box-like body is full after cutting a predetermined number of times, the lower discharge lid of the box-like body 18 is opened and the discharge roll is driven to drop the end of the interlayer film onto the belt conveyor and discharge it outdoors. By doing so, the series of operations ends.

The present invention also applies to the trimming of films in various laminates of glass and resin films such as bilayers and anti-laserlations, and the trimming of resin moldings applied to the periphery of automobile plate glass, which remain on the periphery of glass, such as so-called encapsulation. It will be easily understood that the method and apparatus for removing resin are also within the scope of the present invention, as they can be applied as they are to similar methods for removing unnecessary resin parts.

(Effects of the Invention) According to the present invention, it is possible to easily cut the flexible interlayer film edge sharply and smoothly, thereby preventing the glass from being chipped, the interlayer film end to be cut from wrapping around the cutter knife, and the glass from being cut off easily and smoothly. This has the advantage that there is no adhesion or generation of cut layers, and the discharge can be performed automatically and easily.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the present invention, Fig. 2 is a perspective view of the cutting machine, Fig. 3 A to C are perspective views showing various aspects of the fin-like member, and Fig. 4 is a side view of the ejection means. It is. 1... End of interlayer film, 2... Plate glass, 9... Cutting machine.

Claims (1)

[Scope of Claims] 1. In a method for cutting and removing an end of an interlayer film that is interposed between two sheets of glass and protrudes from the periphery of the sheet glass by running a cutter knife along the periphery of the sheet glass, the cutter knife is moved along the periphery of the sheet glass. The cutter knife is moved in close proximity to each other, and is caused to run while applying ultrasonic vibration to the cutter knife along the length direction of the knife at a frequency of 20 to 40 KHz and a width of 20 to 60 μm. Method for cutting and removing membrane edges. 2 In a device that runs a cutter knife along the periphery of a glass plate to cut and remove the end of an interlayer film that is interposed between two glass plates and protrudes from the periphery between the glass plates, the length of the knife edge is cut using an ultrasonic oscillator as a driving source. A cutter knife that slightly vibrates along the width direction, and a fin-like member for preventing the end of the interlayer film from drooping close to the lower part of the outer surface of the cutter knife. Cutting removal device. 3 A receiving opening for the cut end of the interlayer film adjacent to the cutter knife and a box-like body for temporarily storing the end of the interlayer film having a lower lid for ejection are provided, and a pair of parallel ejection rolls are supported below the box-like body. 3. The interlayer film end portion interposed between glass plates according to claim 2, wherein the discharge rolls are arranged to rotate oppositely to each other and can be driven and adjusted so as to move toward and away from each other. cutting and removal equipment.