JP4827267B2 - Small sheet glass manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a small thin glass, and more particularly to an apparatus for manufacturing a small thin glass used for a display window of a small device such as a mobile phone.

A display window used in a small electronic device such as a cellular phone is required to have a high degree of accuracy and accuracy with a dimensional error of ± 0.1 mm or less because the product itself is small. Recently, as the design of these electronic devices is diversified and complicated, there is a tendency that higher accuracy is required.
Conventionally, a polycarbonate resin that is lightweight and easy to process is mainly used for display windows of such small devices.

  In particular, recently, there is a tendency that a touch panel is introduced into a mobile phone. However, since the touch panel is frequently touched with a finger or pressed strongly, there is a concern that a polycarbonate resin may be scratched or distorted. Therefore, a thin glass plate having a thickness of 0.5 to 1.1 mm is increasingly used for the display window. However, when thin glass is used for small parts such as a display window of a cellular phone, the difficulty of processing when cutting out the small thin glass becomes a problem.

  As a method for cutting the thin glass, a method is disclosed in which an edge provided with a scribe line on the upper surface of the thin glass is protruded from the end of the conveyor, and the thin glass is cut along the scribe line. Patent Document 1). In this method, when the opposite end side of the scribe line is pressed and supported by the lower pressing member, the upper pressing member is lowered in an arc shape at the same time or with a time delay, and the upper pressing member becomes a scribe line of the thin glass as it descends. The sheet glass is broken and cut by pressing the edge side and applying a moment in the edge direction.

  However, although this cutting method can cut linearly, it is not suitable for cutting in a curvilinear manner, and it is likely to cause a deviation in dimensions, so high accuracy and accuracy are required. Another disadvantage is that it is not suitable for manufacturing small glass products.

  Further, in the case of flat glass products, chamfering is performed to prevent breakage and danger at the time of work, but considerable time is required for chamfering to obtain accurate dimensions. In particular, thin glass is troublesome because it tends to break and requires great care.

  As a method for cutting a glass substrate or the like with high accuracy, a laser cutting method (Patent Document 2), a cutting separation method by chemical treatment (Patent Documents 3 and 4), and a chamfering method by etching (Patent Document 5) are also disclosed. However, these methods use expensive equipment, so that the cost becomes high and the scale of the equipment becomes large. In particular, when chemical treatment is performed, since a chemical such as hydrogen fluoride is used, there is a problem in that it is complicated in terms of handling and waste liquid treatment.

JP-A-8-253336 JP2002-224870 JP2004-307337 JP 2006-182644 A JP 2000-169166 A

  Accordingly, an object of the present invention is to produce a small thin glass sheet having an outer dimension of 25 mm × 25 mm to 50 mm × 100 mm and a thickness of 0.5 to 1.1 mm, and can be manufactured quickly and inexpensively with a dimensional error of 0.01 mm or less. To provide an apparatus.

  As a result of intensive studies to achieve the above object, the present inventors have changed the scribe line constituting the shape of the small thin glass on the upper surface of the strip-shaped thin glass into the vertical scribe line and the horizontal scribe line. By providing the lines so as to cross each other and providing the vertical scribe lines so as to reach the long side end of the strip-shaped thin glass, it is possible to manufacture a small thin glass quickly and with high dimensional accuracy. It has been found that, when a scribe line is drawn using a cutter having a blade angle larger than that of a cutter conventionally used for cutting thin glass, the thin glass can be easily cut. The invention has been reached.

  That is, the present invention is a cutting device (B) for cutting out a small thin glass having a shape of a straight line and / or a curve having an outer dimension of 25 mm × 25 mm to 50 mm × 100 mm from a strip-shaped thin glass having a thickness of 0.5 to 1.1 mm. And an end processing device (C) for polishing and chamfering the end portion of the cut-out thin sheet glass, and the cutting device (B) has at least the strip-shaped sheet glass predetermined. A table having a positioning part and a fixing part to be fixed in position; and two scribe lines (a) and (b) reaching the long sides on both sides of the strip-like thin glass fixed to the table; and Shows two scribe lines (c) and (d) intersecting the scribe lines (a) and (b), and the figure surrounded by these four scribe lines constitutes the outer shape of the small thin glass. Movable cutter provided on the four; and the four scrubs The strip-shaped thin glass Eve line are provided, and having a pressurized cutting means for cutting the outer portion of the scribe line, a manufacturing system for a small thin glass.

  According to the apparatus for producing a small thin glass of the present invention, a small thin glass having a small dimensional error can be efficiently produced.

Schematic of the cutting device in the manufacturing apparatus of the present invention 1 is an enlarged plan view of the table 2 and the movable cutter 3 part of the cutting apparatus of FIG. Schematic of movable cutter of cutting device Striped thin glass with scribe lines in the form of small thin glass Schematic of scribe line outer periphery cutting means Side view of end processing equipment Schematic diagram of polishing device and thread chamfering means Schematic diagram of polishing device and yarn chamfering device

  In the present invention, the small thin glass means a plate glass having an outer dimension of 25 mm × 25 mm to 50 mm × 100 mm and a thickness of 0.5 to 1.1 mm. Here, the external shape of the small thin glass plate is not limited to a straight line, and may have a curved line.

  The apparatus for producing a small thin glass of the present invention has a cutting device (B) for cutting out the small thin glass from the strip-shaped thin glass, and an end processing device (C) for polishing and chamfering the end of the small thin glass. . As the strip-shaped sheet glass, soda-lime glass that is inexpensive and excellent in workability is used. The dimensions of the strip-shaped sheet glass are not particularly limited, and are appropriately selected in the range of 30 to 90 mm in width and 300 to 500 mm in length according to the dimensions of the desired small sheet glass.

  Moreover, you may install the cutting device (A) which cuts out strip-shaped thin plate glass from the base plate glass of thickness 0.5-1.1mm in the front | former stage of the manufacturing apparatus of this invention. A known device can be used as the cutting device (A), but it is preferable to use a material using diamond at the tip, and the cutting of the base glass is usually driven by a servo motor or the like. Is done.

FIG. 1 shows an example of the cutting device (B).
The cutting device (B) includes at least a table 2 having a positioning portion and a fixing portion for fixing the strip-shaped thin glass 1 at a predetermined position; on the upper surface of the strip-shaped thin glass fixed by the table A movable cutter 3 that repeatedly draws the scribe line forming the outer shape of the small thin glass by the number of the small thin glass to be cut out; and the strip-shaped thin glass provided with the four scribe lines. Pressure cutting means 4-1 and 4-2 are provided for cutting the outside.

The table 2 will be described with reference to FIGS. The table 2 has a positioning part 201 and a fixing part 202 for fixing the strip-shaped thin glass sheet to a predetermined position.
The strip-shaped thin glass is required to be accurately fixed at a predetermined position of the fixing portion 202 on the table 2 in order to provide a desired scribe line. Examples of the means for positioning the strip-shaped thin glass include a method of pressing a movable jig 203 from the front and rear of the strip-shaped thin glass 1 as shown in FIG. The driving of the jig is preferably controlled accurately using computer numerical control (hereinafter “CNC”).

  The positioned strip-shaped thin glass is fixed by the fixing portion 202, and then a scribe line is provided by the movable cutter 3. In the present invention, it is preferable that the fixing portion 202 having the suction hole 204 is provided on the lower side of the strip-shaped thin glass as the fixing portion 202.

As shown in FIG. 2, the movable cutter 3 is installed on a frame that can be moved in the long side direction of the strip-shaped thin glass by a motor, and moves on the frame in the short side direction of the strip-shaped thin glass by the motor. It is attached to the attachment part.
The movable cutter 3 descends from above the table, and after the tip of the cutter tip comes into contact with the upper surface of the strip-shaped thin glass, it moves in the short side direction and the long side direction of the strip-shaped thin glass, and the scribe line Is provided.

  FIG. 3 shows the vicinity of the cutting edge portion of the movable cutter 3. The cutter blade has a cutter tip 301 using diamond at the tip, and the cutter tip 301 is fixed by an attaching / detaching chuck 302. Further, the inclination angle A of the cutting edge of the cutter tip is conventionally 120 to 130 ° when used for cutting thin glass, but in the present invention, the inclination angle A is 140 to 150 °. Is preferred.

  The movable cutter 3 in the present invention is moved in the long side direction and short side direction of the strip-shaped thin glass by motors 303 and 304, respectively. Since these motors are driven by CNC, not only straight lines but also curved scribe lines can be provided.

The scribe lines constituting the outer shape of the small thin glass 1 are the two scribe lines (a) and (b) that reach the long side ends on both sides of the strip-shaped thin glass, and each of the two scribe lines. Four scribe lines (c) and (d) intersecting (a) and (b). These scribe lines are provided so that the enclosed figure becomes the outer shape of the small thin glass, but considering that the edge is cut by the chamfering process applied later, the outer shape of the desired small thin glass is Also, a scribe line is provided on the outside of 0.1 to 1.0 mm. The scribe lines (a) and (b) are provided so as to reach the end of the long side of the strip-shaped thin glass, and the scribe lines (c) and (d) are crossed with the two scribe lines. This is for facilitating the cutting out of a desired small thin glass sheet.
In the present invention, these four scribe lines can be repeatedly provided as many as the number of small thin glasses designed for the strip-shaped thin glass.

  The strip-shaped thin glass 1 in which the four scribe lines are repeatedly provided is conveyed from the table 2 to the cutting means 4 via the transport carriage 210 and the conveyor 400a, and the cutting means 4 cuts out the small thin glass. It is. As described above, when the inclination angle of the cutting edge of the movable cutter 2 is set to 140 to 150 °, the outer portion can be easily cut.

The strip-shaped sheet glass provided with the strip-shaped sheet glass and the scribe line is conveyed by a carriage 210 disposed under the table 2.
The carriage 210 includes a transport unit 211 that transports a strip-shaped thin glass plate and a transport unit 212 that transports a strip-shaped thin glass plate provided with a scribe line. By reciprocating 210b, the strip-shaped thin plate glass conveyed to the cutting device (B) is conveyed to the positioning unit 201, the fixing unit 202, and then the pressure cutting means 4.

  When the carriage 210 is at the position 210a, the transport unit 211 picks up the strip-shaped thin plate glass positioned by the positioning portion, and the transport unit 212 picks up the strip-shaped thin plate glass provided with the scribe line, The carriage 210 moves to 210b, and the conveying means 211 and 212 repeat a series of operations of placing the thin glass on the fixing portion 202 and the conveyor 400 and returning to 210a, respectively.

As means for picking up the strip-shaped thin glass of the conveying means 211 and 212, it is possible to strongly fix without damaging the thin glass, and if the suction is released, the thin glass can be easily removed, It is preferable to use a vacuum suction means (shaded portion).
Further, the shape of the conveying means 211 is not particularly limited. On the other hand, since the strip-shaped thin glass provided with the scribe line may be decomposed on the table, the conveying means 212 is arranged so that the entire upper surface of the strip-shaped thin glass is adsorbed and the section is not left on the table. It is preferable to have an adsorbing means in the form of a box or box.

In the cutting device (B), as shown in FIG. 4, a set of scribe lines (a) to (d) constituting the outer shape of the small thin glass plate and another set of scribe lines are formed by the movable cutter. It is preferable to further provide a partition line (e) between the lines (a) to (d).
As the pressure cutting means used in this case, a preferred example is the apparatus shown in FIG.

The apparatus shown in FIG. 5 cuts the strip-shaped thin plate glass provided with the scribe line, which is conveyed by the conveyor 400a, from the small thin glass partition line (e) by the pressure cutting means 4-1. A glass section containing a set of scribe lines (a) to (d) is obtained, and then the outer portions of the outer scribe lines (a) to (d) are cut by the pressure cutting means 4-2.
The pressure cutting means 4-1 and 4-2 have pressing means 411 and 421 such as a rod, and further push pins 412 and 422, and descend when the thin glass is transported to a predetermined position. When one surface divided by the line is pressed by the pressing means 411 and 421, the push pins 412 and 422 are further lowered and lightly pressed on the outside of the pressed portion to cut.

The conveyor 400a is installed horizontally, while the conveyor 400b is installed so as to descend, and the pressure cutting means 4-1 is disposed above the roller 401 in the switching portion between the conveyor 400a and the conveyor 400b. Has been.
Since the scribe line (e) of the strip-shaped thin glass 1 conveyed to the conveyor 400a passes through the roller 401 and stops before the scribe line (a ′) passes through the roller 401, the strip shape A portion of the surface of the thin glass 1 including the scribe lines (a) to (e) is in a state of floating in the air. Next, the pressure cutting means 4-1 installed above the roller 401 is lowered to cut the strip-shaped thin glass plate 1 from the scribe line (e). Thus, the thin glass part which has scribe line (a)-(d) among the strip-shaped thin glass 1 is conveyed by the conveyor 400b.

  When the conveyor 400b that conveys the thin glass having the scribe lines (a) to (d) stops at a predetermined position, the transfer means 430 descends, and the thin glass is adsorbed by the adsorbing means (shaded portion at the tip). Then, it is transferred to the thin glass fixing table 432. At that time, in order to avoid the interference of the conveyor 400b, the table 431 in which the groove is cut (see the dotted line portion in FIG. 5) is raised from below the conveyor 400b.

When the sheet glass transferred to the sheet glass fixing base 432 by the transfer means 430 is positioned so that the surface surrounded by the scribe lines (a) to (d) is fixed, the vacuum suction part (shaded part) Then, the pressure cutting means 4-2 descends and cuts the outer portions of the scribe lines (a) to (d). In this way, a small thin glass is obtained.
The cut piece of thin glass is collected in the hopper 434 via the collecting means 433 and the like.

  Next, the thin glass fixing table 432 releases the vacuum suction, and the pressure cutting means 4-2 sucks the small thin glass by the vacuum suction part (shaded part) and moves up to 4-2 'when it rises. The small thin glass is transferred to the conveyor 400c. At this time, the transfer means 430 transfers the thin glass having the next scribe lines (a ′) to (d ′) to the fixed base 432 in conjunction with the pressure cutting means 4-2.

Further, the present invention provides a lower surface of a strip-shaped thin glass plate provided with the scribe line as means for cutting the outer portion of the scribe line, instead of the pressure cutting means 4-1 and 4-2 described above. You may have the heater which heats, and the cold air blowing means which sprays 0-5 degreeC cold on the upper surface of a strip-shaped thin glass plate.
In this case, the strip-shaped thin glass plate repeatedly provided with the scribe line in the length direction by the above-described process is heated at the lower surface to 90 to 100 ° C. by the heater, and at the upper surface by the cold air blowing means at 0 to 5 ° C. Cold air is blown. Thereby, distortion arises in the scribe line peripheral part of the said thin glass, As a result, the target small thin glass is cut | disconnected from a scribe line part.

  The heater can be appropriately selected from known ones. Moreover, although the said cold air can also select and use a well-known thing suitably, in this invention, it is preferable to use compressed air with easy acquisition and handleability.

  The installation method of the heater and the cold air jetting unit, and the method of using the cutting unit using these are not particularly limited. For example, after the scribe line is provided on the strip-shaped thin glass, it may be transferred to a heater unit and the cutting means may be used, but when the scribe line is provided, the thin glass is placed inside a table for fixing the thin glass. In addition to installing a heater, it is preferable that a cold air jet nozzle is installed at the tip of the movable cutter, and a scribe line is provided on the thin glass plate and at the same time the cold air is blown. As a result, since the peripheral portion is cut at the same time as the scribe line is applied, the aforementioned pressure cutting means 4 becomes unnecessary, and the manufacturing efficiency is improved.

  The ends of the small thin glass cut out by the cutting device (B) are sharp and not only dangerous but also easy to chip and cause damage. Therefore, in this invention, the edge part of the small thin glass cut out by the edge part processing apparatus (C) is grind | polished, and also thread chamfering is carried out.

An example of the edge processing device (C) is shown in FIG.
The end processing device (C) includes at least a turntable 5 that rotates by 60 °, and 6n (n is an integer of 1 or more) small thin glass fixing portions arranged at equal intervals on the circumference of the turntable. 6, and a loading / unloading device 7, a positioning device (not shown), an end rough polishing device, and an end finish arranged at positions corresponding to the individual small thin glass fixing portions on the outside of the turntable. An end portion processing apparatus having a polishing apparatus, an upper thread chamfering apparatus, and a lower thread chamfering apparatus 8 is preferable. Specifically, each time the turntable 5 is rotated by 60 ° in order of n pieces of small thin glass cut out by the cutting device, (I) the small thin glass is loaded by the loading / unloading device 7. Loaded on the glass fixing part, (II) positioned and fixed on the small thin glass fixing part by the positioning device, (III) the end rough polishing by the end rough polishing device, (IV) The end portion is polished by the end finishing polishing device, (V) the upper side chamfering device is used to chamfer the upper side of the end, and (VI) the lower side yarn chamfering device is used to end the end portion. (VII) The end processing device is unloaded from above the small thin glass fixing portion by the loading / unloading device 5 after the lower side of the thread is chamfered. That is, all n pieces are transferred to the next step at the next 60 ° while n pieces of small thin glass are processed in each step.

In this way, by adopting a method in which the turntable 5 is used to transfer small thin glass plates between devices in a circular arrangement, the number of components of the device itself can be reduced as compared with the case of a linear arrangement.
Note that n is a number of 1 or more and is not particularly limited. However, if n is too large, the space occupied by the device increases and a powerful motor is required to drive the turntable and the like. Thus, the cost is increased, and therefore n is preferably 1 to 3.

  In the end processing apparatus (C) in the present invention, the small thin glass rotates with an axis passing through the center of the upper surface and the lower surface of the small thin glass as a rotation axis, as well as an end rough polishing device and an end finish polishing. Ends of the apparatus, the upper thread chamfering device, and the lower thread chamfering device that respectively press the cutting means against the end of the rotating small thin glass sheet to polish the end of the small thin glass sheet, or chamfer the thread. It is preferably a partial processing apparatus.

  In such end processing, it is preferable to employ cutting means using a copying cam. As shown in FIG. 7, the cutting means using the copying cam includes a copying cam 601 in which the small thin glass fixing portion 6 has a desired small thin glass shape, and the small thin plate disposed on the copying cam. It comprises means 602 for fixing glass, a fixed small thin glass, and means for rotating the copying cam. On the other hand, the end rough polishing device, the end finish polishing device, the upper side yarn chamfering device, and the lower side yarn chamfering device 8 are movable so as to reciprocate in a certain direction as they contact the side surfaces of the rotating scanning cam 601. Guide roller 801, adjusting means for always bringing the guide roller 801 into contact with the copying cam 601 with the same pressure, and a structure having the same diameter as the guide roller 801 and contacting the end of the rotating small thin glass 9 With this configuration, the cutting means 802 that polishes or chamfers the end portion can operate appropriately in conjunction with the guide roller.

  By making the diameter dimensions of the guide roller 801 and the cutting means 802 the same, the ends of the small thin glass cut out from the cutting device (B) (the painted portions at both ends of the small thin glass 9 in FIG. 7) Is cut into a small thin glass plate having a desired shape.

The means 602 for fixing the small thin glass disposed on the copying cam 601 preferably uses vacuum suction for the reasons described above.
The cutting means 802 can be appropriately selected from known means, but it is generally preferable to use a rotary cutting means such as a diamond wheel. The cutting means 802 is rotated by a motor 803.
The count used for the cutting means is preferably 350 to 500 in rough polishing, 600 to 800 in finish polishing, and 500 to 800 in upper and lower thread chamfering.

Since the guide roller 801 transmits the shape of the copying cam 601 to the rotary cutting means 802, it is necessary to reciprocate in a certain direction so as to correspond to the change in the distance between the center of the copying cam 601 and the contact portion. It is.
Further, during polishing and thread chamfering, it is necessary that the cutting means 802 is always pressed against the end of the small thin glass 9 rotating about the one-dot chain line in FIG. 8 with the same pressure. Therefore, the guide roller 801 needs to be always in contact with the copying cam 601 rotating in synchronization with the small thin glass plate 9 with the same pressure.
On the other hand, at the corner of the small thin glass 9, the cutting means 802 may jump and the small thin glass may be damaged. For this reason, the end rough polishing apparatus, the end finish polishing apparatus, the upper thread chamfering apparatus, and the lower thread chamfering apparatus 8 have substantially the same structure, and have the structure shown in FIG.

An example of such adjustment means is the method shown in FIG. That is, the plates 805 and 806 are attached to both sides of the adjusting shaft 804 that rotates around the one-dot chain line in the figure, the weight 807 is attached to one plate 805, and the guide roller 801 and the cutting are attached to the other plate 806. A means 802 is attached. The adjusting shaft 804 rotates in the direction by being pulled in the direction of the arrow by the weight 807, and the guide roller 801 and the cutting means 802 are pressed against the copying cam 601 and the small thin glass glass 9 with a constant force corresponding to the weight, respectively. It is done.
Further, the adjustment shaft 804 is provided with an oil-filled or gas-filled cylinder 808 that keeps the pressing pressure of the guide roller 801 and the cutting means 802 constant, and prevents the guide roller and the cutting means from jumping. The

The means for rotating the small thin glass sheet and the copying cam is not particularly limited. However, as shown in FIG. 6, at least the small thin glass sheet 9 and the copying cam 601 have the same rotation axis, and A small-diameter gear 603 disposed in the lower portion, having a rotating shaft located at the center of the turntable 5, and a large-diameter gear 604 disposed so as to mesh with the small-diameter gear 603 included in each small thin glass fixing portion, In addition, it is preferable to use a rotating means including a servo motor 605 that drives the large-diameter gear 604. Further, as shown in FIG. 6, the large-diameter gear may be driven via a reduction gear 606.
By using such means, it is possible to rotate all the small thin glass plates installed on the fixed part on the turntable with one motor.

  Further, the positioning device has means for positioning the small plate glass 10 so as to correspond to the copying cam 601. The means for positioning the thin glass in the present invention is not particularly limited, but it is preferable to use CNC in order to perform accurate positioning.

In order to polish and chamfer the edge of a small thin glass sheet, the edge must be free from cutting. Further, since the cutting means is pressed against the rotating small thin glass to perform polishing and thread chamfering, the small thin glass must be firmly fixed.
In order to satisfy such requirements, it is preferable to use means for fixing the lower surface of the small thin glass sheet by vacuum suction as means for fixing the small thin glass sheet on the copying cam.

  Furthermore, in order to obtain a uniform cutting surface, the rotation speed of the small thin glass is such that the end of the small thin glass is the end rough polishing device, the end finishing polishing device, the upper thread chamfering device, and the lower thread surface. It is preferable that the cutting means is controlled so as to pass at the same speed. That is, when the cutting portion is located at the end far from the rotation axis of the small thin glass, the rotation speed of the small thin glass is reduced, and conversely, when the cutting portion is located at the end close to the rotation axis, the rotation speed is increased.

  In particular, when manufacturing a small thin glass that requires high strength, the small thin glass manufacturing apparatus of the present invention may further include a chemical processing apparatus (D) that is strengthened by chemical processing. The chemical treatment device (D) is a chemical treatment device that replaces sodium contained in a small thin glass with potassium, and can rapidly cool the inside of the preheating furnace, so that one predetermined amount of the small thin glass is carried out. After that, the temperature in the furnace can be quickly returned to the initial temperature, and the next predetermined amount of small thin glass can be carried in.

  The chemical treatment apparatus (D) used in the present invention has at least a heater having means for raising the furnace temperature from room temperature to 400 to 450 ° C. at a preset temperature raising rate, and the furnace temperature from 450 ° C. Preheating furnace with a fan that cools rapidly to room temperature; Chemical treatment tank with molten potassium nitrate at 400-450 ° C; Heater, lower air inlet, upper air outlet, and preset cooling rate A slow cooling furnace having means for lowering the furnace temperature from 400 to 450 ° C. to 90 to 100 ° C .; a hot water tank having 50 to 60 ° C. water; a hot water tank having 90 to 95 ° C. water; Consists of means for conveying thin glass.

In the preheating furnace, the interior of the furnace is brought to room temperature, and after a predetermined amount of small thin glass is carried in, the furnace temperature is changed from room temperature to 400 to 450 over 30 minutes to 1 hour using a heater according to the temperature raising program. The temperature is raised to ° C.
The heated predetermined amount of small thin glass is carried out of the preheating furnace and conveyed to a chemical treatment tank. After carrying out the predetermined amount of small sheet glass from the preheating furnace, in order to carry in the next predetermined amount of small sheet glass, the fan in the preheating furnace is operated to introduce outside air into the furnace, and the preheating furnace Lower the internal temperature to room temperature.

  The said chemical processing tank has 400-450 degreeC molten potassium nitrate. The small thin glass is chemically treated and strengthened by being immersed in the treatment tank. That is, sodium contained in the small thin glass is replaced with potassium, and as a result, the strength of the small thin glass is increased. Although the immersion time depends on the size of the small thin glass, it is 30 minutes to 5 hours.

The slow cooling furnace has a heater, an intake port at the bottom and an exhaust port at the top, and the furnace temperature is set to 400 to 450 ° C. in advance before carrying the predetermined amount of small thin glass. . After carrying in the predetermined amount of small thin glass, the temperature is lowered to a predetermined temperature in 30 minutes to 1 hour by means of opening / closing of the intake port and exhaust port or switching on / off of the heater, and then the predetermined amount Unload small glass sheet.
After carrying out the predetermined amount of small thin glass, the furnace temperature is heated to 400-450 ° C. using the heater in order to carry in the next predetermined amount of small thin glass.

  Since the potassium nitrate crystals in the chemical treatment tank are attached to the surface of a predetermined amount of the small thin glass carried out from the slow cooling furnace, it is cleaned by the hot water tank and the hot water tank.

  The small thin glass manufacturing apparatus of the present invention can manufacture a small thin glass with a precision with a dimensional error of 0.01 mm or less, quickly and inexpensively, so that a display window of a small device such as a mobile phone is manufactured. Useful for.

DESCRIPTION OF SYMBOLS 1 Strip-shaped thin glass 2 Table 3 Movable cutter 4-1 Pressure cutting means 4-2 Pressure cutting means 5 Turntable 6 Small thin glass fixing part 7 Loading / unloading device 8 Type polishing / chamfering device adjustment shaft stage 9 Small thin glass 201 Positioning portion 202 Fixing portion 203 Jig 204 Suction hole 210 Cart 211 Transport means 212 Transport means 213 Cart drive motor 214 Rail 301 Cutter tip 302 Cutter tip detachable chuck 303 Movable cutter drive motor 304 Movable cutter drive Motor 400a Conveyor 400b Conveyor 400c Conveyor 401 Roller 411 Thin glass pressing means 412 Push pin 421 Thin glass pressing means 422 Push pin 423 Thin glass fixing base 430 Transfer means 4 One 433 recovery unit 434 hopper 601 copying cam 602 small thin glass fixing unit 603 diameter gear 604 large-diameter gear 605 servo motor 606 reduction gear 801 guides rollers 802 cutting means 803 motor 804 adjusting shaft 805 plate 806 plate 807 weight 808 Cylinder

Claims (14)

  A cutting apparatus (B) for cutting out a small thin glass having a shape of a straight line and / or a curve having an outer dimension of 25 mm × 25 mm to 50 mm × 100 mm from a strip-shaped thin glass having a thickness of 0.5 to 1.1 mm; Positioning having an end processing device (C) for polishing and chamfering the end of a small sheet glass, and the cutting device (B) fixing at least the strip-shaped sheet glass at a predetermined position. A table having a portion and a fixed portion; and two scribe lines (a) and (b) reaching the long side end portions on both sides of the thin glass fixed to the table, and each of the scribe lines ( Movable cutter that provides two scribe lines (c) and (d) intersecting a) and (b) so that the figure surrounded by these four scribe lines constitutes the outer shape of the small glass sheet And four scribe lines are provided. All strips of the thin glass, and having a pressurized cutting means for cutting the outer portion of the scribe line, the small thin glass manufacturing apparatus.   2. The small thin glass according to claim 1, wherein the movable cutter is a cutter in which the scribe lines of (a) to (d) are repeatedly provided by the number of small thin glasses that draw the strip-shaped thin glass. 3. Manufacturing equipment.   The movable cutter is further partitioned between a set of scribe lines (a) to (d) constituting the outer shape of the small thin glass and another set of scribe lines (a) to (d). A cutter for providing a wire (e), wherein the pressure cutting means cuts from the partition wire (e) of the small thin glass, and then has a set of scribe wires (a) to (d) obtained. The apparatus for producing a small thin glass according to claim 2, comprising means for cutting an outer portion of the scribe lines (a) to (d) from a glass piece.   Furthermore, it has a heater that heats the lower surface of the strip-shaped thin glass plate provided with the scribe line to 90 to 100 ° C., and cold air jetting means for blowing cold air of 0 to 5 ° C. on the upper surface of the strip-shaped thin glass plate. Item 4. A manufacturing apparatus for a small thin glass according to any one of Items 1 to 3.   The manufacturing apparatus of the small thin glass described in Claim 4 whose cold air which blows off from a cold air ejection nozzle is compressed air.   In addition to the table having a heater inside, the movable cutter has a cold air jetting means at the tip, and when fixed to the table, a thin glass whose lower surface is heated by the heater, The apparatus for producing a small thin glass according to claim 4 or 5, wherein the cutter has means for blowing cold air at the same time as providing the scribe line.   The apparatus for producing small thin glass according to any one of claims 1 to 6, wherein the movable cutter is a movable cutter having a blade having an inclination angle of 140 to 150 °.   The apparatus for producing a small thin glass according to any one of claims 1 to 7, wherein the table has means for fixing the strip-shaped thin glass by vacuum suction.   A turntable in which the end treatment device (C) is rotated at least by 60 °; 6n (n is an integer of 1 or more) small thin glass fixing portions arranged at equal intervals on the circumference of the turntable; And a loading / unloading device, a positioning device, an end rough polishing device, an end finish polishing device, and an upper edge thread chamfering device, which are arranged outside the turntable at positions corresponding to the individual small thin glass fixing portions. , And an end processing device having a lower thread chamfering device, each time the turntable rotates 60 ° in order of n small glass sheets cut out by the cutting device, (I) It is loaded on the small thin glass fixing part by a loading / unloading device, and (II) is positioned on the small thin glass fixing part by the positioning device, (III) The end is roughly polished by the end rough polishing device, (IV) The end is polished by the end finish polishing device, and (V) the upper edge chamfering device is used. The upper side of the end portion is chamfered, and (VI) the lower side yarn chamfering device is used to chamfer the lower side of the end portion, and then (VII) the small thin glass fixing portion is loaded by the loading / unloading device. The apparatus for producing a small thin glass according to any one of claims 1 to 8, which is an end processing apparatus unloaded from above.   The end processing device (C) rotates around the axis through which the small thin glass passes through the center of the upper surface and the lower surface of the small thin glass, the end rough polishing device, the end finish polishing device, the upper thread surface Each of the cutting device and the lower thread chamfering device is an end processing device that presses a cutting means against an end of the rotating small thin glass to polish and chamfer the end of the small thin glass, The small thin glass fixing portion includes a copying cam, a means for fixing the small thin glass disposed on the copying cam, the fixed small thin glass, and a means for rotating the scanning cam. The shape of the upper surface is the same shape as the upper surface of the small thin glass plate, and has a rotation axis passing through the center of the upper surface, and rotates in synchronization with the small thin glass plate; Imitation Means for positioning so as to correspond to the cam; the end rough polishing device, the end finish polishing device, the upper yarn chamfering device, and the lower yarn chamfering device, respectively, on the side surface of the rotating scanning cam A movable guide roller that reciprocates in a certain direction when contacted, an adjusting means that always makes the guide roller contact the copying cam with the same pressure, and the rotating thin sheet glass having the same diameter as the guide roller The manufacturing apparatus of the small thin glass of Claim 9 which has a cutting means which contacts the edge part of this and which grinds or chamfers the said edge part in conjunction with the said guide roller.   The means for rotating the small thin glass and the copying cam in the small thin glass fixing part has at least the same rotating shaft as the small thin glass and the copying cam, and a small-diameter gear disposed below the rotation shaft, the turn The rotary shaft is located at the center of the table, and includes a large-diameter gear arranged so as to mesh with the small-diameter gear included in each small thin glass fixing portion, and a servo motor that drives the large-diameter gear. Item 11. A small-sized thin glass manufacturing apparatus according to Item 10.   In the end processing device (C), the rotation speed of the small thin glass is such that the end of the small thin glass is the end rough polishing device, the end finishing polishing device, the upper side yarn chamfering device, and the lower side yarn chamfering device. The manufacturing apparatus of the small thin glass of Claim 10 or 11 currently controlled to pass through the cutting means of this at the same speed.   Furthermore, the chemical strengthening device replaces sodium contained in the small thin glass whose end has been polished and chamfered by the end processing device (C) with potassium, at least at a preset heating rate. A preheating furnace having a heater having means for raising the internal temperature from room temperature to 400 to 450 ° C. and a fan for rapidly cooling the internal temperature from 450 ° C. to room temperature; a chemical treatment tank having potassium nitrate in a molten state at 400 to 450 ° C. A slow cooling furnace having a heater, an intake port installed in the lower part, an exhaust port installed in the upper part, and means for lowering the temperature in the furnace from 400 to 450 ° C. to 90 to 100 ° C. at a preset temperature reduction rate; A hot water tank having water at 60 ° C; a hot water tank having water at 90 to 95 ° C, and a chemical strengthening device (D) comprising means for transporting a small thin glass in the order described above. Small sheet metal described Vinegar production equipment.   The small-size device according to any one of claims 1 to 13, further comprising a cutting device (A) for cutting out a strip-shaped thin plate glass from a raw glass plate having a thickness of 0.5 to 1.1 mm in a front stage of the cutting device (B). Thin glass manufacturing equipment.

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