CN111957537A - Blind hole dispensing method of LCD screen - Google Patents
Blind hole dispensing method of LCD screen Download PDFInfo
- Publication number
- CN111957537A CN111957537A CN202010764659.XA CN202010764659A CN111957537A CN 111957537 A CN111957537 A CN 111957537A CN 202010764659 A CN202010764659 A CN 202010764659A CN 111957537 A CN111957537 A CN 111957537A
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- CN
- China
- Prior art keywords
- dispensing
- glue
- stage
- platform
- blind hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
- B05D1/265—Extrusion coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
Abstract
The invention discloses a blind hole dispensing method of an LCD screen, wherein an LCD product is fed onto a platform, a CCD (charge coupled device) lens is adopted to capture and mark the inner diameter of a blind hole on a glass sheet and the inner diameter of a circular hole of a polaroid respectively, data are processed through equipment, the concentricity of the blind hole and the circular hole of the polaroid is judged, and whether the concentricity is less than 0.1mm or not is judged; if yes, carrying out the next step; if not, alarming and throwing the materials, and feeding again; adjusting the dispensing position of the needle head, and arranging the dispensing position of the needle head at a position which is 0.3 +/-0.1 mm away from the round hole of the polaroid and 0.1-0.2mm away from the upper surface of the glass sheet; setting the angle of the platform, and inclining the platform at 4-7 degrees, namely, forming an included angle between the glass sheet and the needle head at 83-86 degrees; executing a dispensing process, wherein the dispensing process comprises a first stage of pre-dispensing, a second stage of uniform dispensing and a third stage of ending dispensing; and (5) shooting by the CCD lens for self-checking, and detecting the dispensing effect. The technical scheme of the invention aims to improve the dispensing quality and reduce the reject ratio of products.
Description
Technical Field
The invention relates to the field of liquid crystal display module processing, in particular to a blind hole dispensing method for an LCD screen.
Background
In order to reduce the height of the camera protruding out of the mobile phone shell, a blind hole is arranged on the glass sheet for placing the camera, the glue dispensing in the hole is different from the general straight line plane glue dispensing, and the product or the needle head needs to be rotated, so that the common glue dispensing method cannot be adopted, and a new glue dispensing method is needed.
Disclosure of Invention
The invention mainly aims to provide a blind hole dispensing method for an LCD screen, aiming at improving the dispensing quality and reducing the reject ratio of products.
In order to achieve the purpose, the invention provides a blind hole dispensing method of an LCD screen, which comprises the following steps:
s1, feeding the LCD product onto a platform, respectively capturing and marking the inner diameter of a blind hole on a glass sheet and the inner diameter of a circular hole of a polaroid by using a CCD (charge coupled device) lens, processing data by using equipment, judging the concentricity of the blind hole and the circular hole of the polaroid, and judging whether the concentricity is less than 0.1 mm;
s2, if yes, the next step is carried out; if not, alarming and throwing the materials, and feeding again;
s3, adjusting the dispensing position of the needle head, and setting the dispensing position of the needle head at a position 0.3 +/-0.1 mm away from the circular hole of the polaroid and at a position 0.1-0.2mm away from the upper surface of the glass sheet;
s4, setting a platform angle, and inclining the platform at 4-7 degrees, namely, forming an included angle between the glass sheet and the needle head at 83-86 degrees;
s5, executing a dispensing process, wherein the dispensing process comprises a first stage of pre-dispensing, a second stage of uniform dispensing and a third stage of ending dispensing;
and S6, taking a picture by the CCD lens for self-inspection, and detecting the dispensing effect.
Preferably, in step S5, the first step of pre-dispensing glue is performed by setting the air pressure of the needle at 0.2 ± 0.08MPa and the speed at 130 ± 40 degrees/second, and starting dispensing glue after the platform rotates 2 ° to 3 °.
Preferably, in step S5, the second stage of dispensing at a constant speed is to dispense by rotating the platform 355 ° -358 at a constant speed of 130 ± 40 degrees/second with the area where the center of the blind hole is located as the axis.
Preferably, in step S5, the third end-to-end dispensing operation is closing the needle, the platform further rotates by 3 ° to 7 °, and the needle nozzle is driven to dispense the residual glue, so that the glue at the head and the tail of the circle slowly flows together to form a closed circle.
Preferably, in step S6, the detection objects are the hole diameter, glue width and glue height of the blind hole on the glass sheet after the glue dispensing is completed.
Compared with the prior art, the invention has the beneficial effects that:
(1) glue can flow to the edge of the polaroid more easily, so that hole light leakage and little glue are reduced;
(2) the inner diameter and the outer diameter of the roundness are more accurate;
(3) after dispensing, the blind holes are more round, and the appearance is more attractive;
(4) glue does not overflow to the polaroid;
(5) the polaroid is not scratched; the glue burrs and notches at the inner edge of the hole can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of the position of the needle and product of the present invention;
FIG. 3 is a schematic view of another needle and product of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The blind hole dispensing method for the LCD screen provided in this embodiment, as shown in fig. 1 to 3, includes the following steps:
s1, feeding the LCD product onto a platform, respectively capturing and marking the inner diameter of the blind hole 110 on the glass sheet 100 and the inner diameter of the round hole 210 on the polaroid 200 by using a CCD lens, processing data by using equipment, judging the concentricity of the blind hole 110 and the round hole 210 on the polaroid 200, and judging whether the concentricity is less than 0.1 mm; the inner diameter of the blind hole 110 circle on the glass sheet 100 is used as a first Mark, the inner diameter of the circular hole 210 of the polaroid 200 is used as a second Mark, then the concentric distance of the two circles is compared through computer data processing, the concentricity is less than 0.1mm, normal production is carried out, and the concentric distance of the incoming material POL and the circular glass hole 210 area is ensured to reach the standard.
S2, if yes, the next step is carried out; and if not, alarming, throwing and reloading.
S3, adjusting the dispensing position of the needle head 300, and setting the dispensing position of the needle head 300 at a position (indicated by L) 0.3 +/-0.1 mm away from the round hole 210 of the polarizer 200 and at a position (indicated by H) 0.1-0.2mm away from the upper surface of the glass sheet 100; so as to ensure that the needle 300 does not scratch the polarizer 200, and the hot melt adhesive can freely diffuse to the inner diameter edge of the circular hole 210 of the polarizer 200 by gravity.
S4, setting a platform angle, and inclining the platform at 4-7 degrees, namely, making an included angle a between the glass sheet 100 and the needle head 300 at 83-86 degrees; so that the glue can flow to the edge of the polarizer 200 more easily during dispensing to fill the inner diameter boundary of the polarizer 200 and reduce light leakage.
S5, executing a dispensing process, wherein the dispensing process comprises a first stage of pre-dispensing, a second stage of uniform dispensing and a third stage of ending dispensing;
and S6, taking a picture by the CCD lens for self-inspection, and detecting the dispensing effect.
In an embodiment of the present invention, in step S5, the first step of pre-dispensing is to set the air pressure of the needle 300 to 0.2 ± 0.08MPa and the speed to 130 ± 40 degrees/second, and start dispensing after the platform rotates 2 ° to 3 ° to ensure the speed is stable when the platform starts to rotate for dispensing.
In an embodiment of the invention, in step S5, the second stage of the constant dispensing operation is to perform dispensing by uniformly rotating 355 ° -358 at a speed of 130 ± 40 degrees/second with the center of the blind hole 110 as the axis O, so that the glue has a uniform width and flows to the edge of the polarizer 200 to be filled.
In a specific embodiment of the present invention, in step S5, the final dispensing operation in the third stage is that the needle 300 closes the glue, the platform continues to rotate by 3 ° to 7 °, and the needle nozzle is driven to dispense the residual glue, so that the glue at the head and the tail of the circle slowly flows together to form a closed circle; can reduce glue accumulation at the head-to-tail joint or out-of-round holes caused by insufficient glue.
In an embodiment of the present invention, in step S6, the detection objects are the hole diameter, glue width and glue height of the blind hole 110 on the dispensed glass sheet 100.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A blind hole dispensing method of an LCD screen is characterized by comprising the following steps:
s1, feeding the LCD product onto a platform, respectively capturing and marking the inner diameter of a blind hole on a glass sheet and the inner diameter of a circular hole of a polaroid by using a CCD (charge coupled device) lens, processing data by using equipment, judging the concentricity of the blind hole and the circular hole of the polaroid, and judging whether the concentricity is less than 0.1 mm;
s2, if yes, the next step is carried out; if not, alarming and throwing the materials, and feeding again;
s3, adjusting the dispensing position of the needle head, and setting the dispensing position of the needle head at a position 0.3 +/-0.1 mm away from the circular hole of the polaroid and at a position 0.1-0.2mm away from the upper surface of the glass sheet;
s4, setting a platform angle, and inclining the platform at 4-7 degrees, namely, forming an included angle between the glass sheet and the needle head at 83-86 degrees;
s5, executing a dispensing process, wherein the dispensing process comprises a first stage of pre-dispensing, a second stage of uniform dispensing and a third stage of ending dispensing;
and S6, taking a picture by the CCD lens for self-inspection, and detecting the dispensing effect.
2. The method for dispensing glue from blind holes of LCD screen of claim 1, wherein in step S5, the first step of pre-dispensing glue is performed by setting the air pressure of the needle at 0.2 + -0.08 MPa and the speed at 130 + -40 degrees/sec, and starting dispensing glue after the platform rotates 2 ° -3 °.
3. The method for dispensing glue from blind holes of LCD screen of claim 2, wherein in step S5, the second stage of dispensing glue at uniform speed is dispensing glue by rotating 355 ° -358 at uniform speed at 130 ± 40 ° per second with the center of the blind hole as the axis.
4. The method for dispensing blind holes of LCD screen of claim 3, wherein in step S5, the final dispensing operation in the third stage is that the needle head closes the glue, the platform rotates 3 ° -7 ° again to drive the needle nozzle to dispense residual glue, so that the glue at the head and tail ends of the circle slowly flows together to form a closed circle.
5. The method for dispensing blind holes of LCD screen of any one of claims 1-4, wherein in step S6, the detection objects are the hole diameter, glue width and glue height of the blind holes on the glass sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764659.XA CN111957537A (en) | 2020-07-30 | 2020-07-30 | Blind hole dispensing method of LCD screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764659.XA CN111957537A (en) | 2020-07-30 | 2020-07-30 | Blind hole dispensing method of LCD screen |
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| Publication Number | Publication Date |
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| CN111957537A true CN111957537A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010764659.XA Pending CN111957537A (en) | 2020-07-30 | 2020-07-30 | Blind hole dispensing method of LCD screen |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854594A (en) * | 2019-01-10 | 2019-06-07 | 铭研(苏州)自动化设备有限公司 | A kind of precision reaches 5 microns of dispensing applying method |
| CN110579898A (en) * | 2019-09-23 | 2019-12-17 | 武汉华星光电技术有限公司 | display module and dispensing method thereof |
| CN111337500A (en) * | 2020-02-24 | 2020-06-26 | Oppo广东移动通信有限公司 | Dispensing control method, display module and electronic equipment |
-
2020
- 2020-07-30 CN CN202010764659.XA patent/CN111957537A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854594A (en) * | 2019-01-10 | 2019-06-07 | 铭研(苏州)自动化设备有限公司 | A kind of precision reaches 5 microns of dispensing applying method |
| CN110579898A (en) * | 2019-09-23 | 2019-12-17 | 武汉华星光电技术有限公司 | display module and dispensing method thereof |
| CN111337500A (en) * | 2020-02-24 | 2020-06-26 | Oppo广东移动通信有限公司 | Dispensing control method, display module and electronic equipment |
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Application publication date: 20201120 |
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