CN109823174B - Production and manufacturing process of liquid crystal combination instrument - Google Patents
Production and manufacturing process of liquid crystal combination instrument Download PDFInfo
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- CN109823174B CN109823174B CN201910222767.1A CN201910222767A CN109823174B CN 109823174 B CN109823174 B CN 109823174B CN 201910222767 A CN201910222767 A CN 201910222767A CN 109823174 B CN109823174 B CN 109823174B
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Abstract
The invention discloses a manufacturing process of a liquid crystal combined instrument, which comprises the steps of firstly, automatically dispensing glue on a plastic shell attached with a liquid crystal screen by using an automatic glue dispenser, firstly placing the plastic shell subjected to glue dispensing on a base of a laminating machine, then placing a TP glass component on the shell according to a positioning position designed by a jig, laminating a heating panel of the laminating machine, mounting a PCBA plate on the panel component attached with the PCBA plate, fixing by using a locking screw, assembling a rear cover on a screen component provided with the PCBA, fixing by using the locking screw, carrying out vibration test and aging test on the assembled liquid crystal combined instrument, wherein the manufacturing process is simple, safe and reliable, and the difference between the upper gap and the lower gap between the TP component and the plastic shell is reduced by improving the glue dispensing process and the laminating process.
Description
Technical Field
The invention relates to a process, in particular to a production and manufacturing process of a liquid crystal combination instrument, which belongs to the production and manufacturing of large-size liquid crystal combination instruments and belongs to the related technical field of liquid crystal instrument production.
Background
The existing production process aims at the traditional production process of a small-size (less than 12.3 inches) liquid crystal instrument, the size of a plastic shell of the small-size liquid crystal instrument is 668 +/-2 mm, the deformation is 1.0-1.5mm and the deformation of a TP glass component is 0.5-0.8mm due to the small sizes and small deformation of the TP component and the plastic component, the traditional production process cannot ensure that the gap between the TP component and the plastic shell of the double 12.3 inches liquid crystal instrument is less than 0.2mm, the difference between the upper gap and the lower gap between the TP component and the plastic shell is less than 0.5mm, and the environmental test requirements of high temperature of 85 ℃ and low temperature of 30 ℃ cannot be met, so the traditional production process of the liquid crystal instrument cannot be applied after production.
The chinese patent publication No. 107132684a, 09/05 in 2017, discloses an invention named as "a process for producing a liquid crystal module". The patent comprises the following specific steps: the method comprises the steps of providing a display module and a backlight module, aligning, laminating and assembling the backlight module and the display module into a liquid crystal module, laminating an IC, an FPC and a PCB on a liquid crystal finished product panel, taking anisotropic conductive adhesive as a conductive medium and an adhesive, moving the liquid crystal finished product panel into a drying furnace for drying, and drying the liquid crystal finished product panel by using an automatic conveyor to obtain a dried product. Although this liquid crystal module's production technology has improved drying efficiency, can accurate control gluey drying effect, nevertheless is not applicable to the production of this application two 12.3 cun liquid crystal instrument, so it still has above-mentioned defect.
Therefore, the production and manufacturing process for the double 12.3-inch liquid crystal combination instrument is simple and reasonable, and meets the requirement that the liquid crystal combination instrument is used in the severe environment of the automobile (+85 ℃ to-30 ℃), and the production and manufacturing process is particularly necessary.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a production and manufacturing process of a liquid crystal combination instrument, which has simple and reasonable process, is safe and reliable, meets the requirement of the liquid crystal combination instrument on use in the severe environment of an automobile, and reduces the difference between the upper gap and the lower gap of a TP assembly and a plastic surface shell.
In order to achieve the above purpose, the present invention provides a manufacturing process of a liquid crystal combination instrument, comprising the following steps:
(1) dispensing: automatically dispensing glue on the plastic shell attached with the liquid crystal screen by using an automatic glue dispenser;
(2) attaching: placing the plastic surface shell subjected to glue dispensing on a base of a laminating machine, then placing the TP glass assembly on the surface shell according to the positioning position designed by the jig, and heating a panel by the laminating machine for laminating;
(3) assembling the PCBA: mounting the PCBA on the attached panel assembly, and fixing by locking screws;
(4) assembling a rear cover: assembling a rear cover on the screen component on which the PCBA is installed, wherein the rear cover is a hardware iron piece and is fixed by locking screws;
(5) vibration testing: placing the assembled instrument on a transportation vibration table, electrifying and vibrating, and checking;
(6) and (3) aging test: and electrifying the instrument for aging in an aging room, and checking.
As a further improvement of the invention, in the step (1), the automatic dispenser scans the plastic shell of the liquid crystal screen to judge whether the dispensing sealing edge is flat, and the automatic dispenser moves along the dispensing sealing edge to collect the height of the dispensing sealing edge relative to the automatic dispenser, the width of the dispensing sealing edge, the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane and the size of each corner of the dispensing sealing edge,
when the adhesive dispensing sealing edge of the plastic shell is judged to be uneven, the plastic shell is conveyed to a polishing station,
and when the glue dispensing sealing edge of the plastic shell is judged to be flat, the automatic glue dispenser calculates the glue dispensing position.
As a further improvement of the present invention, the automatic glue dispenser includes an image scanner and a two-dimensional sensor, the scanner is configured to read image information of the glue dispensing and sealing edge of the plastic face shell, the computer determines whether the glue dispensing and sealing edge is flat by distinguishing the image information and by surface smoothness, and calculates a width of the glue dispensing and sealing edge on an image plane, the two-dimensional sensor is configured to collect a height of the glue dispensing and sealing edge relative to the position of the automatic glue dispenser and an inclination angle of each side line of the glue dispensing and sealing edge relative to a horizontal plane, and calculate a width of the glue dispensing and sealing edge and a size of a fillet at each corner of the glue dispensing and sealing edge by the obtained inclination angle and the width of the glue dispensing and sealing edge on the image plane.
As a further improvement of the present invention, the automatic dispenser calculates and recommends a dispensing pinhole diameter of the automatic dispenser according to a dispensing sealing edge width obtained from a scanning result.
As a further improvement of the invention, the automatic dispenser comprises a straight-side dispenser and a round-corner dispenser, the straight-side dispenser dispenses straight sides of the plastic face shell in the dispensing process of the automatic dispenser, the round-corner dispenser dispenses round corners of the plastic face shell, and the automatic dispenser comprises a conversion mechanism which converts the positions of the straight-side dispenser and the round-corner dispenser.
As a further improvement of the invention, the glue outlet pipe of the automatic glue dispenser is connected with an air valve, the glue dispensing amount is controlled by controlling the output air pressure of the air valve, after the diameter of a glue dispensing pinhole of the automatic glue dispenser is selected, the glue dispensing distance and the glue dispensing amount are set according to the width of a glue dispensing sealing edge,
setting the positions of the straight edges for dispensing on the width of the corresponding dispensing sealing edge according to the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane and the width of the dispensing sealing edge,
the descending distance of the dispensing position of the automatic dispenser is set according to the height of the dispensing sealing edge relative to the position of the automatic dispenser,
and setting a dispensing arc route of the fillet dispenser according to the size of the fillet at each corner of the dispensing sealing edge.
As a further improvement of the invention, in the step (2), the pressing is carried out at the temperature of the heating panel of the pressing machine ranging from 60 ℃ to 65 ℃, and the pressure holding time is 120-130 s.
As a further improvement of the present invention, in the step (5), the vibration frequency is used: 35 ± 5HZ, vibration time: the instrument was subjected to a simulated vibration test at 120 + -10S operating conditions.
As a further improvement of the present invention, in the step (6), an aging time is used: 2 +/-0.5 h, aging temperature: the instrument was subjected to aging test at 60 + -10 deg.C.
Compared with the prior art, the invention has the following advantages and effects: the invention has simple production and manufacturing process, is safe and reliable, achieves the purpose of reducing the difference between the upper gap and the lower gap of the TP assembly and the plastic face shell by improving the glue dispensing process and the pressing process, the mounting shell of the existing liquid crystal combined instrument is designed to be curved for attaching the vehicle-mounted central control position, in addition, the pressing surface of the plastic shell and the TP glass assembly is designed to be an inward inclined pressing surface, and an inward inclined fillet is arranged at the corner, so as to reduce the difference between the upper gap and the lower gap of the TP assembly and the plastic face shell, so that the packaging of the liquid crystal combined instrument is more sealed, and the service life of the liquid crystal combined instrument is prolonged, the invention adopts the automatic glue dispenser to carry out glue dispensing, determines the glue dispensing scheme and the path by determining the specific condition of the pressing surface, carries out glue dispensing accurately, prevents the condition of poor sealing property or glue overflow, the pressing machine keeps a certain temperature, prevents liquid glue from solidifying before the glue dispensing is finished, and, the requirement that a user pursues a large-size display screen in a limited space is met, and therefore the use quality of the automobile instrument is improved.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
A production and manufacturing process of a liquid crystal combination instrument comprises the following steps:
(1) dispensing: placing a plastic shell to be attached with a liquid crystal screen on a special jig of an automatic dispenser, fixing by using a quick clamp, operating a button of the automatic dispenser, and performing automatic dispensing according to a designed dispensing position and direction programming; the position, the speed and the dispensing amount of the dispensing are set according to the design values, so that the dispensing amount is sufficient and the phenomenon of glue overflow cannot occur;
(2) attaching: the plastic face-piece after will gluing is put on the base of special pressfitting machine earlier, then places TP glass assembly on the face-piece according to the location position of tool design, and the start button of operation pressfitting machine, pressfitting machine heating panel temperature carry out the pressfitting when 60 ℃ -65 ℃, dwell time: 120-130s, after lamination, the gap between the TP screen assembly and the plastic part can be ensured to be less than 0.2mm, and the gap difference between the upper surface and the lower surface of the TP screen assembly and the surface shell after lamination is less than 0.5 mmm;
(3) assembling the PCBA: PCBA board includes mainboard and AD board, installs mainboard and AD board respectively on the panel components after the laminating, and insert the FPC connecting wire, lock and pay 10 specifications and be M3 × 8 screw, lock and pay torsion: 0.5 ± 0.05 N.M; in the process, a screw machine is used for counting and managing screws, so that potential quality hazards caused by missing locking of the screws are prevented;
(4) assembling a rear cover: the rear cover is assembled to the screen assembly on which the PCBA has been installed, the rear cover is a hardware iron, 9 screws of specification M3 × 8 are locked, and the lock is locked and is provided with a torsion force: 0.5 ± 0.05 N.M; in the process, a screw machine is used for counting and managing screws, so that potential quality hazards caused by missing locking of the screws are prevented;
(5) vibration testing: put the instrument that the equipment was accomplished and circular telegram vibration on the special tool of transportation shaking table, the inspection has phenomenons such as black screen, flower screen, splash screen, no touch, vibration frequency: 35 ± 5HZ, vibration time: 120 +/-10S; the vibration frequency is the frequency in the process of simulating the running of the automobile, the working state of a product after actual loading can be simulated, the outflow of defective products can be effectively prevented, and the product quality is improved;
(6) and (3) aging test: electrifying the instrument in an aging room for aging (voltage: 12 +/-1V), checking whether black screen, screen splash and screen flash phenomena exist or not, and aging time: 2 +/-0.5H, aging temperature: 60 +/-10 ℃; the working state of the automobile under extreme conditions after actual loading is simulated, so that the outflow of defective products can be effectively prevented, and the product quality is improved;
in addition, a function test and an appearance inspection are carried out, wherein the function test comprises the steps of placing the instrument on a special function detection jig, carrying out automatic detection through software, detecting qualified products after PASS is displayed on a computer, carrying out full-function automatic detection by using special software, and effectively preventing the outflow of defective products;
and (3) appearance inspection: the instrument is subjected to appearance inspection according to an appearance inspection standard, and special tools such as a feeler gauge and a film are used for inspection and judgment, so that the appearance meets the standard requirements of a car factory.
The invention has simple production and manufacturing process, safety and reliability, achieves the purpose of reducing the difference between the upper clearance and the lower clearance of the TP component and the plastic face shell by improving the glue dispensing process and the pressing process, the mounting shell of the existing liquid crystal combined instrument is designed to be curved surface shape for fitting the vehicle-mounted central control position, in addition, the pressing surface of the plastic shell and the TP glass component is designed to be an inward inclined pressing surface and the corner is provided with an inward inclined fillet for reducing the difference between the upper clearance and the lower clearance of the TP component and the plastic face shell, so that the packaging of the liquid crystal combined instrument is more sealed, the service life of the liquid crystal combined instrument is prolonged, the invention adopts the automatic glue dispenser for glue dispensing, determines the glue dispensing scheme and path by determining the specific condition of the pressing surface, so as to precisely perform glue dispensing, prevent the poor sealing property or glue overflow condition, the pressing machine keeps a certain temperature, and prevent the liquid, the double-12.3-inch liquid crystal combination instrument can be used in the severe environment of the automobile, and the requirement that a user pursues a large-size display screen in a limited space is met, so that the use quality of the automobile instrument is improved.
As an improved specific implementation manner, in the step (1), the automatic dispenser scans the plastic shell of the liquid crystal display to determine whether the dispensing sealing edge is flat, and the automatic dispenser moves along the dispensing sealing edge to acquire the height of the dispensing sealing edge relative to the automatic dispenser, the width of the dispensing sealing edge, the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane, and the size of each corner of the dispensing sealing edge.
The automatic glue dispenser comprises an image scanner and a two-dimensional sensor, the image scanner and the two-dimensional sensor are both connected with a computer processor, the image scanner may employ a CCD vision measuring detector, the two-dimensional sensor may employ a model ZLDS100, the scanner is used for reading the image information of the dispensing and sealing edge of the plastic face shell, the computer judges whether the dispensing and sealing edge is flat or not through distinguishing the image information and surface smoothness, and calculating the width of the dispensing and sealing edge on the image plane, wherein the two-dimensional sensor is used for acquiring the position height of the dispensing and sealing edge relative to the automatic dispenser and the inclination angle of each side line of the dispensing and sealing edge relative to the horizontal plane, and calculating the width of the dispensing sealing edge and the size of the fillet at each corner of the dispensing sealing edge according to the obtained inclination angle and the width of the dispensing sealing edge on the image plane.
When the adhesive dispensing sealing edge of the plastic shell is judged to be uneven, the plastic shell is conveyed to a polishing station,
when judging that plastic face-piece point is glued the involution border and is leveled, the automatic point gum machine calculates the point and glues the position, the automatic point gum machine is through reading the width at some glue involution border and the inclination of some glue involution border each sideline relative horizontal plane and the fillet size of each corner at some glue involution border, set up the movement track of automatic point gum machine, the automatic point gum machine is through the inclination at some glue involution border and the width at some glue involution border, set for the position on the relative point of point glue involution border width at the automatic point gum machine point of gluing position, make under the influence of plane slope condition, the automatic point gum machine can prevent that liquid glue from overflowing to the inboard flow of plastic face-piece, set up the orbit of gluing of automatic point gum machine at the corner through some glue involution border each.
As an improved specific implementation manner, the automatic dispenser calculates and recommends the diameter of the dispensing pinhole of the automatic dispenser according to the width of the dispensing sealing edge obtained from the scanning result.
As an improved embodiment, the automatic dispenser comprises a straight-edge dispenser and a fillet dispenser, the automatic dispenser dispenses the glue at the straight edge of the plastic face shell, the fillet dispenser dispenses the glue at the fillet of the plastic face shell, the automatic dispenser comprises a conversion mechanism which converts the positions of the straight-edge dispenser and the fillet dispenser, the automatic dispenser comprises a mounting frame, the straight-edge dispenser and the fillet dispenser are mounted on the mounting frame, the conversion mechanism can be a rotating motor, an output shaft of the rotating motor is connected with the mounting frame and is arranged at the middle position of the straight-edge dispenser and the fillet dispenser, the positions of the straight-edge dispenser and the fillet dispenser are converted by the rotating motor, the mounting frame is provided with a three-dimensional axial position adjusting device, and the three-dimensional axial position adjusting device is connected with a computer control system, the computer control system sets the parameters of the three-dimensional axial position adjusting device to control the path tracks of the straight-edge dispensing machine and the fillet dispensing machine.
As an improved specific implementation manner, the glue outlet pipe of the automatic glue dispenser is connected with an air valve, the glue dispensing amount is controlled by controlling the output air pressure of the air valve, after the diameter of a glue dispensing pinhole of the automatic glue dispenser is selected, the glue dispensing distance and the glue dispensing amount are set according to the width of a glue dispensing sealing edge,
setting the positions of the straight edges for dispensing on the width of the corresponding dispensing sealing edge according to the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane and the width of the dispensing sealing edge,
the descending distance of the dispensing position of the automatic dispenser is set according to the height of the dispensing sealing edge relative to the position of the automatic dispenser,
and setting a dispensing arc route of the fillet dispenser according to the size of the fillet at each corner of the dispensing sealing edge.
The invention realizes the automatic and accurate control of the dispensing path to prevent the glue from being released and overflowing, thereby achieving the effect of reducing the difference between the upper and lower gaps of the TP assembly and the plastic surface shell.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A production and manufacturing process of a liquid crystal combination instrument is characterized in that: the method comprises the following steps:
(1) dispensing: automatically dispensing glue on the plastic shell attached with the liquid crystal screen by using an automatic glue dispenser;
(2) attaching: placing the plastic surface shell subjected to glue dispensing on a base of a laminating machine, then placing the TP glass assembly on the surface shell according to the positioning position designed by the jig, and heating a panel by the laminating machine for laminating;
(3) assembling the PCBA: mounting the PCBA on the attached panel assembly, and fixing by locking screws;
(4) assembling a rear cover: assembling a rear cover on the screen component on which the PCBA is installed, wherein the rear cover is a hardware iron piece and is fixed by locking screws;
(5) vibration testing: placing the assembled instrument on a transportation vibration table, electrifying and vibrating, and checking;
(6) and (3) aging test: electrifying and aging the instrument in an aging room, and checking;
in the step (1), the automatic dispenser scans the plastic shell of the liquid crystal screen to judge whether the dispensing sealing edge is flat or not, and the automatic dispenser moves along the dispensing sealing edge to collect the position height of the dispensing sealing edge relative to the automatic dispenser, the width of the dispensing sealing edge, the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane and the size of each corner of the dispensing sealing edge,
when the adhesive dispensing sealing edge of the plastic shell is judged to be uneven, the plastic shell is conveyed to a polishing station,
and when the glue dispensing sealing edge of the plastic shell is judged to be flat, the automatic glue dispenser calculates the glue dispensing position.
2. The manufacturing process of a liquid crystal cluster according to claim 1, characterized in that: the automatic glue dispenser comprises an image scanner and a two-dimensional sensor, the image scanner is used for reading image information of a glue dispensing sealing edge of a plastic face shell, a computer judges whether the glue dispensing sealing edge is flat or not through distinguishing the image information through surface smoothness, the width of the glue dispensing sealing edge on an image plane is calculated, the two-dimensional sensor is used for collecting the position height of the glue dispensing sealing edge relative to the automatic glue dispenser and the inclination angle of each side line of the glue dispensing sealing edge relative to the horizontal plane, and the width of the glue dispensing sealing edge and the fillet size of each corner of the glue dispensing sealing edge are calculated through the obtained inclination angle and the width of the glue dispensing sealing edge on the image plane.
3. The manufacturing process of a liquid crystal cluster according to claim 2, characterized in that: and the automatic dispenser calculates and recommends the diameter of a dispensing pinhole of the automatic dispenser according to the width of the dispensing sealing edge obtained by the scanning result.
4. The manufacturing process of a liquid crystal cluster according to claim 3, characterized in that: the automatic dispenser comprises a straight-edge dispenser and a fillet dispenser, the automatic dispenser dispenses in a dispensing process, the straight-edge dispenser dispenses straight edges of the plastic face shell, the fillet dispenser dispenses at fillets of the plastic face shell, the automatic dispenser comprises a conversion mechanism, and the conversion mechanism converts the positions of the straight-edge dispenser and the fillet dispenser.
5. The manufacturing process of a liquid crystal cluster according to claim 4, characterized in that: the glue outlet pipe of the automatic glue dispenser is connected with an air valve, the glue dispensing amount is controlled by controlling the output air pressure of the air valve, after the diameter of a glue dispensing pinhole of the automatic glue dispenser is selected, the glue dispensing distance and the glue dispensing amount are set according to the width of a glue dispensing sealing edge,
setting the positions of the straight edges for dispensing on the width of the corresponding dispensing sealing edge according to the inclination angle of each side line of the dispensing sealing edge relative to the horizontal plane and the width of the dispensing sealing edge,
the descending distance of the dispensing position of the automatic dispenser is set according to the height of the dispensing sealing edge relative to the position of the automatic dispenser,
and setting a dispensing arc route of the fillet dispenser according to the size of the fillet at each corner of the dispensing sealing edge.
6. The manufacturing process of a liquid crystal cluster according to claim 1, characterized in that: in the step (2), the pressing machine is used for pressing the heating panel at the temperature of 60-65 ℃, and the pressure maintaining time is 120-130 s.
7. The manufacturing process of a liquid crystal cluster according to claim 1, characterized in that: in the step (5), the vibration frequency is used: 35 ± 5HZ, vibration time: the instrument was subjected to a simulated vibration test at 120 + -10S operating conditions.
8. The manufacturing process of a liquid crystal cluster according to claim 1, characterized in that: in the step (6), the aging time is used: 2 +/-0.5 h, aging temperature: the instrument was subjected to aging test at 60 + -10 deg.C.
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| CN201910222767.1A CN109823174B (en) | 2019-03-22 | 2019-03-22 | Production and manufacturing process of liquid crystal combination instrument |
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| CN201910222767.1A CN109823174B (en) | 2019-03-22 | 2019-03-22 | Production and manufacturing process of liquid crystal combination instrument |
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| DE19910282C1 (en) * | 1999-03-09 | 2001-01-11 | Mannesmann Vdo Ag | Front frame and process for its manufacture |
| CN101422765B (en) * | 2008-11-26 | 2012-08-29 | 信利半导体有限公司 | LCD cade-port gum dispersing device and method |
| CN102963105B (en) * | 2012-10-25 | 2015-01-21 | 昆山希盟自动化科技有限公司 | Method for dispensing and gluing of touch screen |
| CN105904209B (en) * | 2016-06-16 | 2018-10-23 | 安徽工程大学 | A kind of assembling line of automobile combination meter |
| CN107290877A (en) * | 2017-06-30 | 2017-10-24 | 安徽新创智能科技有限公司 | A kind of processing method device of LCDs |
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Denomination of invention: Manufacturing process of liquid crystal combined instrument Effective date of registration: 20210904 Granted publication date: 20201117 Pledgee: Hangzhou United Rural Commercial Bank Limited by Share Ltd. Wushan sub branch Pledgor: ZHEJIANG WILLING TECHNOLOGY Co.,Ltd. Registration number: Y2021330001361 |
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