JP2017019036A - Blasting device and product manufacturing method using blasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reduction of blasting time required for a blasting device, reduction of cost, as well as use of a common nozzle for blasting different patterns.SOLUTION: The blasting device of the invention is a blasting device which blasts portions to be blasted of a work-piece by ejecting abrasive grains 1A to the work-piece while moving above the work-piece. The blasting device comprises: a nozzle 1 for ejecting the abrasive grains; an ejection port 2 having a slit shape and provided in the nozzle 1; and a rotation mechanism 1B for rotating the nozzle around an axis in a direction to eject abrasive grains.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a blasting apparatus and a product manufacturing method by blasting.

  Chemically tempered glass is used as a cover glass used for smartphones and the like. This cover glass is manufactured by cutting a large glass to which a plurality of cover glass sizes are assigned. Chemically tempered glass includes a sheet type that is chemically tempered before cutting and a cell type that is chemically tempered after cutting. Chemically tempered glass has a compressive stress on the surface, is difficult to cut, has poor cutting quality, and a poor yield rate. As a cover glass used for smartphones, sheet types are generally not preferred and are not tempered. The cell type that cuts at is the mainstream. Large glass is cut by blasting using CNC milling or a pen-shaped nozzle. Moreover, it may be cut using a dicing saw or a diamond scriber.

  According to the blast processing method, the initial investment amount of the apparatus can be suppressed as compared with the laser processing method. On the other hand, the processing efficiency of the blast processing method is lower than that of the laser processing method. In order to improve the processing efficiency of the blasting method, a plurality of pen-shaped nozzles are attached to a blasting machine to simultaneously process a plurality of tempered glasses.

  When cutting tempered glass by blasting, a film (resist film) is pasted on both sides of the glass plate, and the film on the processing line (cutting line that cuts the glass) is cut with a cutter, exposure / development, laser light, etc. After removing by blasting.

Japanese Patent Laid-Open No. 10-58325 JP 2001-88030 A Japanese Patent Laid-Open No. 4-94887 Korean Patent No. 1020-1000008565

  Processing for each nozzle in the blast processing method is slower than laser processing. When processing a round hole with a pen-shaped nozzle, the pen-shaped nozzle must be finely circulated (moved). For example, as shown in FIG. 6, when processing is performed on the glass substrate 3 to form the outer edge 3A and the openings 3B and 3C using the pen-shaped nozzle 100, the direction of the arrow indicated by the arrow in FIG. It is necessary to move the nozzle. Since the moving distance of the nozzle is long, the processing efficiency is low.

  If the nozzle injection port and the glass plate have the same size and shape, a plurality of processing portions provided on the glass plate can be processed simultaneously. In this case, since the processing range is wider than that of the pen-shaped nozzle, the spraying pressure of the abrasive grains is dispersed, resulting in a slow processing speed.

  When the nozzle outlet and the processed portion are close to each other, the grinding abrasive grains are reflected. Since the abrasive grains injected from the injection port and the reflected abrasive grains collide, stable injection of the abrasive grains becomes difficult, and the processing speed decreases (the processing time increases). Moreover, the collection rate (ratio which can reuse the used grinding abrasive grain) falls. In particular, when the central axis of the nozzle is at right angles to the glass plate, the above-described problem due to reflection of the abrasive grains occurs. In addition, when the nozzle feed rate is slowed down, the influence of the reflected abrasive grains increases.

  When an opening pattern is formed on the film on the cutting line using laser light with an ultraviolet to near-infrared wavelength, it is possible to process the front and back at the same time, so there is no misalignment between the front and back, and processing time compared to cutters and exposure / development. Is short. However, since the adhesive layer of the film is not completely removed by laser processing alone, the adhesive layer of the film remains on the upper surface of the glass, and the remaining adhesive may adversely affect the subsequent process.

  The present invention has been made in view of the above problems.

  A blasting apparatus according to the present invention is a blasting apparatus that performs blasting at a work portion of the work piece by injecting abrasive grains onto the work piece while moving on the work piece. A nozzle for injecting the abrasive grains, an injection port provided in the nozzle and having a slit shape, and a rotation mechanism for rotating the nozzle around an axis in a direction in which the abrasive grains are ejected. .

  In one embodiment, in the blast processing apparatus, the slit-shaped longitudinal direction is tilted by a predetermined angle with respect to the moving direction of the nozzle, and the projection of the injection port onto the workpiece causes the workpiece to be processed. It is possible to arrange the nozzle so as to enclose it.

  In one embodiment, an outer edge of a product can be formed on the workpiece in the blasting apparatus.

  In one embodiment, in the blast processing apparatus, a through hole can be formed in the processed portion.

  A product manufacturing method by blasting according to the present invention is a product in which grinding abrasive grains are sprayed onto the workpiece while moving on the workpiece, thereby performing blasting at a workpiece portion of the workpiece. A method of adjusting the direction of the nozzle by rotating a nozzle about an axis in a direction in which the abrasive grains are ejected; and the grinding abrasive from an injection port having a slit shape provided in the nozzle. Spraying the grains.

  In one embodiment, in the method for producing a product by blasting, the step of adjusting the direction of the nozzle inclines the longitudinal direction of the slit shape by a predetermined angle with respect to the moving direction of the nozzle, and Arrangement of the nozzle so that projection of the injection port on the object includes the workpiece.

  In one embodiment, in the method for producing a product by blasting, the step of injecting the abrasive grains from the injection port includes a first surface of the workpiece and a second surface opposite to the first surface. Forming through holes by sequentially blasting the surface.

  In one embodiment, in the product manufacturing method by the blast processing, the workpiece has a plurality of product regions respectively corresponding to a plurality of products, and the processed portion corresponds to an outer edge of the product region.

  In one embodiment, in the product manufacturing method by the blast processing, the workpiece has a plurality of product regions respectively corresponding to a plurality of products, and the processed portion corresponds to a through hole included in the product region. To do.

  In one embodiment, the method for producing a product by blasting includes a step of providing a resist film having durability against the abrasive grains on the surface of the processed part, an opening in the resist film, and the processed part In the step of exposing the processed portion, the resist film is irradiated with laser light to provide the opening in the resist film, or the processed portion in the processed portion The opening is provided in the processed portion by attaching the resist film to the other portion.

  In one embodiment, the method for producing a product by blasting includes a step of providing a film on the surface of the processed part, and irradiating the film provided on the processed object with laser light to form an opening in the film. And a step of exposing the processed part, and the film has durability against the abrasive grains.

  In one embodiment, in the method for producing a product by blasting, the step of providing the film on the surface of the processed part includes pasting the film on the processed part using an adhesive. The adhesive is colored in a color that absorbs the laser light.

  According to the present invention, the processing time by the blast processing machine is shortened. Moreover, the cost accompanying blasting can be reduced. Moreover, blasting can be performed using the same nozzle for different patterns.

It is a figure which shows the shape of the nozzle in the blast processing apparatus which concerns on one embodiment of this invention. It is a figure for demonstrating the arrangement angle of the nozzle in the blast processing apparatus which concerns on one embodiment of this invention. It is FIG. (1) for demonstrating adjustment of the angle of a nozzle. It is FIG. (2) for demonstrating adjustment of the angle of a nozzle. It is sectional drawing which shows an example of the aspect of the film provided on a to-be-processed object. It is a figure which shows the shape of the nozzle in the conventional blast processing apparatus.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

  The blasting apparatus according to the present embodiment is a blasting apparatus that performs blasting by injecting abrasive grains onto a workpiece while moving on the workpiece such as a glass plate.

  FIG. 1 is a diagram illustrating the shape of a nozzle in the blasting apparatus according to the present embodiment. The abrasive grains 1A are ejected from the nozzle 1 as shown in FIG. The nozzle 1 includes an ejection port 2 (slit nozzle) having a straight (line segment) elongated hole shape (hereinafter referred to as “slit shape”). The length of the longitudinal side of the ejection port 2 (the width of the nozzle 1) is “w” as shown in FIG.

  A rotation mechanism 1B is provided, whereby the nozzle 1 can rotate about an axis in the direction in which the abrasive grains 1A are ejected (around the vertical axis in FIGS. 1A and 1B). The arrangement angle of the nozzle 1 is adjusted according to the shape of the part to be processed.

  FIG. 2 is a view for explaining the nozzle arrangement angle in the blasting apparatus according to the present embodiment. In the example of FIG. 2, the glass substrate 3 is processed using the nozzle 1. From the glass substrate 3, glass plates corresponding to four products are cut out. That is, the glass substrate 3 has an outer edge 3A and openings 3B and 3C corresponding to four products.

  In FIG. 2, the nozzle 1 is movable in the X-axis direction (the short direction of four products) and the Y-axis direction (the long direction of four products). The longitudinal direction (width direction) of the slit-shaped injection port 2 is inclined by a predetermined angle (for example, θ (0 ° to 45 °)) with respect to the movement direction (for example, the Y-axis direction) of the nozzle 1 and The nozzle 1 is arranged so that the projection of the injection port 2 includes the part to be processed. Note that the angle of the nozzle is not changed during blasting.

  In the example of FIG. 2, the conditions of 0 ° ≦ θ ≦ 45 °, A ≦ w · cos θ, and B ≦ w · sin θ are satisfied. Thereby, when the nozzle 1 moves in the X-axis direction, the portions corresponding to the openings 3B and 3C of the adjacent products can be processed simultaneously. Further, when the nozzle 1 moves in the Y-axis direction, a portion corresponding to the outer edge 3A of the adjacent product can be processed simultaneously.

  For example, when the distances “A” and “B” shown in FIG. 3 are changed to “A ′” and “B ′” shown in FIG. 4, the nozzle 1 is rotated (in FIG. It is rotating clockwise.)

  In the example of FIG. 2, a plurality (two) of nozzles 1 are arranged in accordance with the product pitch (center-to-center distance), and blasting is simultaneously performed on portions (product regions) corresponding to each product.

Regarding the blasting performed by the nozzle 1, the following (1) to (3) are assumed.
(1) The following (1-1) and (1-2) are used alternatively.

  (1-1) A plurality of (here, two) nozzles 1 are moved from one end of the glass substrate 3 to the other along the boundaries between the product areas corresponding to the plurality of products on the glass plate. Each nozzle 1 is arranged so that the injection port 2 of each nozzle 1 includes a processed portion in plan view.

  (1-2) All the nozzles 1 are moved along one or more rounds of the product shape to process the glass plate.

  (2) When two or more cutting lines (outer edge 3A) are provided between a plurality of product regions, the glass substrate 3 is processed simultaneously at the cutting lines. When openings 3B and 3C having a circular shape, a rectangular shape, etc. (for example, for a speaker or a button in a smartphone) are provided near the outer edge 3A, the openings 3B and 3C are processed simultaneously with the outer edge 3A.

  (3) After the processing depth of all the processing portions on the first surface of the glass substrate 3 is about 2/3 of the plate thickness, the glass substrate 3 is reversed from the second surface side of the glass substrate 3 above. The steps (1) and (2) are appropriately performed to cut the glass plate. The steps (1) and (2) may be appropriately performed on only one of the first surface and the second surface of the glass substrate 3 to cut the glass plate.

  In addition, although the processing speed by the nozzle 1 is adjusted suitably, you may make it different in a longitudinal direction and a transversal direction, and you may make it different in a linear part and a corner | angular part (corner part).

  The maximum value of the width (w) of the injection port 2 of the nozzle 1 is preferably about 100 mm or less, more preferably about 75 mm or less, and still more preferably about 50 mm or less. It is preferable that the minimum value of the width (w) is not less than a distance (for example, 10 mm) between adjacent product outlines.

  The angle θ is preferably about 0 ° to 45 °, more preferably about 5 ° to 20 °, and still more preferably about 7 ° to 15 °.

In a typical example, in a rectangular product, the distance including the outer edge of the adjacent product in the short direction and including all the small-shaped processed parts around it is L1, and the outer edge of the adjacent product in the longitudinal direction is included. When the distance including all the small-shaped processed parts around it is L2, the width (w) of the injection port 2 is w ≧ (L1 ² + L2 ² ) ^(1/2) and the outer edge 3A in the longitudinal direction The angle formed with the width direction of the injection port is θ (rad) = arctan (L2 / L1).

  By the way, in the product manufacturing method by blasting according to the present embodiment, as shown in FIG. 5, a film 30 having durability against grinding abrasive grains is provided on the surface of the processed portion of the glass substrate 3, and the condenser lens 20. The film 30 may be irradiated with the laser beam 10 that has been passed through to provide an opening in the film 30, and blasting may be performed by spraying abrasive grains onto the exposed glass substrate 3. The film 30 is pasted on the glass substrate 3 using the adhesive 40. The pressure-sensitive adhesive 40 is colored in a color that absorbs the laser light (that is, colored with a highly absorbing pigment in the ultraviolet to near-infrared wavelength band (such as black)). Thereby, you may remove the film 30 and the adhesive 40 on a cutting line using the laser beam 10 absorbed.

  As a modified example of the above process, a resist film may be formed by applying and drying a resist solution on a portion other than the processed portion of the glass substrate 3 using screen printing or inkjet. This resist film preferably has durability against grinding abrasive grains used in blasting. When a resist film is formed on a portion other than a processed portion by screen printing or inkjet, the resist film may not be colored because laser light is not used.

  The glass as the workpiece may be a chemically tempered glass or an air-cooled tempered glass.

Examples of the material of the workpiece include ceramics such as silicon carbide (SiC, ceramics), sapphire (Al ₂ O ₃ ), sapphire glass, quartz (SiO ₂ , quartz), quartz glass, heat-resistant glass, and alumina.

Next, operational effects (the following three points) of the blasting apparatus according to the present embodiment will be described.
1. Processing time is shortened (blasting speed is improved).
(1) If there is a part where two or more cutting lines or openings are formed between the products within the processing range of the nozzle, the processing time is shortened by processing simultaneously (for example, about 1/2 or less). can do.
(2) An angle at which the width direction of the nozzle is inclined with respect to the cutting line is set. In addition, the nozzle is moved at an increased speed. By these, grinding | pulverization of the grinding abrasive grain supplied from the jet nozzle 2 and the fall of a processing speed resulting from the reflected grinding abrasive grain can be prevented.
2. COO (Cost Of Ownership) is reduced.
(1) Compared with the case where a pen-shaped nozzle is used, the area that can be processed increases as the nozzle 1 moves by a unit length. Therefore, the production amount per unit time is improved.
(2) Compared to the case where a nozzle having an injection port having the same size and shape as a glass plate is used, the amount of grinding abrasive grains used is reduced by moving the nozzle 1 by a unit length. Therefore, the consumption amount of grinding abrasive grains when processing a glass plate having the same area is reduced.
(3) Since grinding of the abrasive grains is suppressed, the recovery rate of the abrasive grains is improved.
(4) For the same reason as the above (1), the processing time for the same range is shortened compared to the case of using a pen-shaped nozzle. This improves the life of the nozzle 1.
3. The same nozzle 1 can be used to cut glass plates having different product pitches and cutting line pitches. Specifically, by changing the angle of the nozzle 1 and the mounting pitch of the nozzle 1, the same nozzle 1 can cope with changes in different product pitches, different cutting line pitches, the number of cutting lines, and the like.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1,100 nozzle, 1A grinding abrasive grain, 1B rotating mechanism, 2 injection port, 3 glass plate, 3A outer edge, 3B, 3C opening, 10 laser beam, 20 condenser lens, 30 film, 40 adhesive.

Claims (12)

A blasting apparatus for performing blasting at a work part in the work piece by spraying abrasive grains on the work piece while moving on the work piece,
A nozzle for injecting the abrasive grains;
An injection port provided in the nozzle and having a slit shape;
A blasting apparatus comprising: a rotation mechanism that rotates the nozzle around an axis in a direction in which the abrasive grains are ejected.   It is possible to arrange the nozzle so that the longitudinal direction of the slit shape is inclined by a predetermined angle with respect to the moving direction of the nozzle, and the projection of the injection port onto the workpiece includes the workpiece. The blasting apparatus according to claim 1, wherein   The blasting apparatus according to claim 1 or 2, wherein an outer edge of a product can be formed on the workpiece.   The blasting apparatus according to any one of claims 1 to 3, wherein a through hole can be formed in the processed part. A product manufacturing method for performing blasting in a processed portion of the workpiece by injecting abrasive grains to the workpiece while moving on the workpiece,
Adjusting the direction of the nozzle by rotating the nozzle about an axis in the direction in which the abrasive grains are ejected;
A method for producing a product by blasting, comprising a step of ejecting the abrasive grains from an ejection port having a slit shape provided in the nozzle.   In the step of adjusting the direction of the nozzle, the longitudinal direction of the slit shape is inclined by a predetermined angle with respect to the moving direction of the nozzle, and the projection of the injection port on the workpiece includes the workpiece. The product manufacturing method by blasting according to claim 5, comprising disposing the nozzle as described above.   The step of injecting the abrasive grains from the injection port is performed by sequentially blasting the first surface of the workpiece and the second surface opposite to the first surface. A method for producing a product by blasting according to claim 5 or 6, comprising forming The workpiece has a plurality of product areas respectively corresponding to a plurality of products,
The product manufacturing method by blast processing according to any one of claims 5 to 7, wherein the processed portion corresponds to an outer edge of the product region. The workpiece has a plurality of product areas respectively corresponding to a plurality of products,
The product manufacturing method by blast processing according to any one of claims 5 to 7, wherein the processed portion corresponds to a through hole included in the product region. Providing a resist film having durability against the abrasive grains on the surface of the workpiece;
Providing an opening in the resist film, and further exposing the workpiece.
In the step of exposing the processed portion, the resist film is irradiated with laser light to provide the opening in the resist film, or the resist film is attached to a portion of the processed portion other than the processed portion. 10. The method for producing a product by blasting according to claim 5, wherein any one of providing the opening in the part to be processed is performed. Providing a film on the surface of the workpiece; and
Irradiating the film provided on the workpiece with laser light to provide an opening in the film, and further exposing the workpiece.
The method for producing a product by blasting according to any one of claims 5 to 9, wherein the film has durability against the abrasive grains. The step of providing the film on the surface of the workpiece includes pasting the film on the workpiece using an adhesive,
The method for producing a product by blasting according to claim 11, wherein the adhesive is colored in a color that absorbs the laser light.

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