CN110370692A - Polaroid exempts from the production technology that drills - Google Patents
Polaroid exempts from the production technology that drills Download PDFInfo
- Publication number
- CN110370692A CN110370692A CN201910747272.0A CN201910747272A CN110370692A CN 110370692 A CN110370692 A CN 110370692A CN 201910747272 A CN201910747272 A CN 201910747272A CN 110370692 A CN110370692 A CN 110370692A
- Authority
- CN
- China
- Prior art keywords
- polaroid
- laminations
- stack
- drills
- exempts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00932—Combined cutting and grinding thereof
Abstract
The present invention discloses a kind of polaroid and exempts from the production technology that drills comprising following steps clean mother matrix；Mother matrix after cleaning is die cut；Mother matrix after cross cutting forms multiple polaroids, and the hole that the same position of each polaroid offers；Multiple polaroid overlappings, form stack of laminations；The hole of multiple polaroids in stack of laminations face one by one, so that forming channel in stack of laminations；Edging processing is carried out to stack of laminations.Present invention is die cut out the hole of polaroid when being die cut polaroid, reduces the processes such as drilling, hole grinding and the hole cleaning to stack of laminations, and then reduce the polaroid production time applied and shielded comprehensively in mobile phone, improves the production efficiency of polaroid.
Description
Technical field
The present invention relates to polaroid technical fields, and in particular, to a kind of polaroid exempts from the production technology that drills.
Background technique
Polaroid is one of three big crucial compositions of liquid crystal display (LCD), be after polyvinyl alcohol film (PVA) is stretched and
A kind of compounded composite material of three cellulose acetate membrane (TAC) is, it can be achieved that liquid crystal display high brightness, high contrast features.
Polaroid area applied to mobile telephone display is smaller, is cut by mother matrix, and in order to adapt to comprehensive screen mobile phone, polaroid is needed
Circular hole needed for reserving preposition setting camera.Production for above-mentioned polaroid, in the prior art, the life of polaroid
Production. art is usually first die cut out the polaroid of corresponding mobile phone screen size, is then then transferred to the polaroid of multiple overlappings
CNC grinder is drilled by polaroid of the CNC grinder to overlapping, is then ground again by CNC to bore position, and
Periphery and the angle R to polaroid discharge again after being ground.In above-mentioned operation, CNC grinder needs first to drill, and
And in order to guarantee drilling quality and drilling cutter head be avoided to fracture, needs repeatedly to be drilled, then replace after grinding cutter head, ability
Continue to grind, additionally need to clean the hole after grinding, process is tedious, and elapsed time is long, leads to polarisation with holes
The production efficiency of piece is lower.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of polaroid and exempts from the production technology that drills.
A kind of polaroid disclosed by the invention exempts from drilling production technology
Clean mother matrix；
Mother matrix after cleaning is die cut；Mother matrix after cross cutting forms multiple polaroids, and each polaroid is same
The hole that position offers；
Multiple polaroid overlappings, form stack of laminations；The hole of multiple polaroids in stack of laminations face one by one, so that stack of laminations
Interior formation channel；
Edging processing is carried out to stack of laminations.
According to an embodiment of the present invention, while carrying out edging processing to stack of laminations, the channel in stack of laminations is carried out
It blows.
According to an embodiment of the present invention, the top from the lower section of stack of laminations towards stack of laminations to the channel in stack of laminations into
Row is blown.
According to an embodiment of the present invention, after to stack of laminations progress edging processing, further includes:
To edging, treated that polaroid detects.
According to an embodiment of the present invention, in cleaning mother matrix step, mother matrix is cleaned on the surface for pasting mother matrix.
According to an embodiment of the present invention, in the step of being die cut to the mother matrix after cleaning, it is die cut the cutting die packet of use
Include substrate, multiple rectangle blade slots and multiple hole shape blade slots；Multiple rectangle blade slots and multiple hole shape blade slots are all provided with
In the front of substrate, and multiple hole shape blade slots are arranged in a one-to-one correspondence respectively in multiple rectangle blade slots.
According to an embodiment of the present invention, one jiao close to rectangle blade slot of hole shape blade slot.
According to an embodiment of the present invention, cutting die further includes multiple magnetic；Multiple magnetic are set to the back side of substrate.
According to an embodiment of the present invention, multiple rectangle blade slots are arranged in the front of substrate in length and breadth；Wherein, longitudinal arrangement
The setting of multiple rectangle blade slot intervals, two neighboring rectangle blade slot splicing is set in transversely arranged multiple rectangle blade slots
It sets.
According to an embodiment of the present invention, the stitching portion of two neighboring rectangle blade slot splicing setting is provided with arc-shaped transition
Structure.
The application is die cut out the hole of polaroid when being die cut polaroid, reduces drilling, hole grinding to stack of laminations
And the processes such as hole cleaning, and then reduce the polaroid production time applied and shielded comprehensively in mobile phone, improve the production of polaroid
Efficiency.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the flow chart that polaroid exempts from drilling production technology；
Fig. 2 is the positive structure schematic of cutting die in the present embodiment；
Fig. 3 is the structure schematic diagram of cutting die in the present embodiment；
Fig. 4 is the portion the A enlarged drawing of Fig. 2 in the present embodiment.
Specific embodiment
Multiple embodiments of the invention will be disclosed with schema below, as clearly stated, the details in many practices
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in some embodiments of the invention, the details in these practices is non-essential.In addition, for the sake of simplifying schema,
Some known usual structures and component will be painted it in the drawings in simply illustrative mode.
It is to be appreciated that the directional instruction such as up, down, left, right, before and after ... of institute is only used in the embodiment of the present invention
In explaining relative positional relationship, motion conditions etc. in the case where a certain particular pose is as shown in the picture between each component, if the spy
When determining posture and changing, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, not especially censure
The meaning of order or cis-position, also non-to limit the present invention, the component described just for the sake of difference with same technique term
Or operation, it is not understood to indicate or imply its relative importance or implicitly indicates the number of indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.In addition, each
Technical solution between a embodiment can be combined with each other, but must can be implemented as base with those of ordinary skill in the art
Plinth will be understood that the combination of this technical solution is not present when conflicting or cannot achieve when occurs in the combination of technical solution,
Also not the present invention claims protection scope within.
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Referring to Fig.1, Fig. 1 is the flow chart that polaroid exempts from drilling production technology.Polaroid in the present embodiment exempts from drilling life
Production. art the following steps are included:
S1 cleans mother matrix.
S2 is die cut the mother matrix after cleaning；Mother matrix after cross cutting forms multiple polaroids, and each polaroid is same
The hole that one position offers.
S3, multiple polaroid overlappings, forms stack of laminations；The hole of multiple polaroids in stack of laminations face one by one, so that folded
Channel is formed in piece group.
S4 carries out edging processing to stack of laminations.
When being die cut polaroid, while it being die cut out the hole of polaroid, reduces drilling, hole grinding and Kong Qing to stack of laminations
The processes such as clean, and then reduce the polaroid production time applied and shielded comprehensively in mobile phone, improve the production efficiency of polaroid.
Again referring to Fig.1, further, further comprising the steps of after carrying out edging processing to stack of laminations:
S5, to edging, treated that polaroid detects.
It is multiple that further, in step sl, mother matrix is cleaned referring to Fig.1, specifically using the surface for pasting mother matrix
Mother matrix is cleaned.In specific application, cleaning device can be used to clean mother matrix, cleaning device have conveyer belt with
And two clearers of transmission end of tape are set, two clearer settings side by side up and down, the surface of each clearer all has
Adhesive-layer has gap between two clearers, which passes through for mother matrix.Between mother matrix is across two clearers
Gap moves under the action of the rotatory force of clearer and conveyer belt conveying capacity, and the adhesive-layer of two cleaning roller surfaces is simultaneously
The two sides of mother matrix is cleaned.Preferably, the width in gap and the consistency of thickness of mother matrix between two clearers.
In step B2, the mother matrix after cleaning is die cut, specifically using die-cutting machine driving cutting die to cleaning after
Mother matrix is die cut, so that the mother matrix after cross cutting forms multiple polaroids.It is designed by the structure of cutting die, so that every after cross cutting
The hole that the same position of one polaroid offers, hole it is in the same size, it is preferred that hole is circular hole, and the circular hole is complete to adapt to
The position of the front camera of face mobile phone, quantity can be one or two, and particular number can be according to comprehensive screen mobile phone
Depending on front camera.In this way, it is die cut out the circular hole applied to comprehensive screen mobile phone together by when being die cut polaroid,
Subsequent drilling, hole grinding and the clean process in hole can be eliminated, while eliminating the bore cutter of CNC grinder in grinding process
It is changed to the time of grinding knife, reduces the production time of polaroid, and then improves the production efficiency of polaroid.
In step s3, the position of the circular hole of corresponding each polaroid makes multiple polaroids be superimposed together, and is formed folded
Piece group, it is however generally that, 50 polaroids can be used and be overlapped into a stack of laminations.The circular hole of each polaroid in stack of laminations is one by one
Face, the superposition of 50 polarisation film perforations, just will form a cross section is circular channel.Preferably, in the upper table of stack of laminations
Face and lower surface attach protective film respectively, specifically, the size of protective film and formation are consistent with polaroid, and corresponding polarisation
The circular hole position of piece also offers identical circular hole, avoids causing to close to channel.By the setting of protective film, to subsequent grinding
Stack of laminations protected.In specific application, lamination can be carried out by hand fit's lamination jig, for example, jig uses
The cooperation of right-angle structure and bar location structure, wherein right-angle structure corresponds to the right angle of polaroid, and bar location structure corresponds to polaroid
On hole.
In step s 4, edging processing is carried out to stack of laminations, specifically, being to place stack of laminations in the jig of CNC grinder
On position, ground by periphery of the CNC grinder to stack of laminations.Preferably, while carrying out edging processing to stack of laminations, to folded
Channel in piece group is blown, specifically, can top from the lower section of stack of laminations towards stack of laminations to the channel in stack of laminations
It blows.It is understood that scrap can be generated when periphery of the CNC grinder to stack of laminations is ground, while also can
So that the temperature of stack of laminations increases, the quality of polaroid is impacted.Top from the lower section of stack of laminations towards stack of laminations is right
Channel in stack of laminations is blown, and the heat that grinding generates can be taken away, and the ascending air being formed simultaneously would also avoid scrap
It enters in channel.It is able to ascend the quality of polaroid.In specific application, it is only necessary to the jig of existing CNC grinder
Be transformed, for example, correspond to the position in the hole of polaroid in the lower section of jig, open up out a through-hole, and with it is extraneous
Air feeder connection, can realize quick transformation on the basis of not changing existing CNC grinder.
In S5 step, specifically the appearance of polaroid is detected, see whether scratch or scratches situation not
Non-defective unit, the polaroid for filtering out non-defective unit can discharge.In specific application, CCD appearance detecting device or artificial meat can be used
Eye detection, herein without limitation.
It is the positive structure schematic of cutting die in the present embodiment with continued reference to Fig. 2, Fig. 2.In order to realize cross cutting polaroid
It is die cut out circular hole simultaneously, the structure of the cutting die of cross cutting is extremely important, and the cutting die of cross cutting is further detailed now.
Cutting die includes substrate 1, multiple rectangle blade slots 2 and multiple hole shape blade slots 3；Multiple rectangle blade slots 2 and
Multiple hole shape blade slots 3 are set to the front of substrate 1, and multiple hole shape blade slots 3 are arranged in a one-to-one correspondence respectively in multiple rectangles
In blade slot 2.
Preferably, one jiao close to rectangle blade slot 2 of hole shape blade slot 3.Hole shape blade slot 3 is located at rectangle blade slot 2
Position be to be determined according to the position of the front camera of comprehensive screen mobile phone design, in order to cut the circular hole position of polaroid can
Correspond to the position of the front camera of comprehensive screen mobile phone.
It is the structure schematic diagram of cutting die in the present embodiment with continued reference to Fig. 3, Fig. 3.Further, the knife in the present embodiment
Mould further includes multiple magnetic 4.Multiple magnetic 4 are set to the back side of substrate 1.
It is understood that more rectangle blade slot can be arranged on substrate 1 in order to disposably cut more polaroid
2 and hole shape blade slot 3, and it is concentrated in the intermediate position of substrate 1, and cutting die is when in use, is the machinery by die-cutting machine
Hand clamps the side of substrate 1, a fairly large number of rectangle blade slot 2 and hole shape blade slot 3 polaroid to be cut downward,
The intermediate position of substrate 1 is concentrated on again, under gravity, the intermediate position receiving weight that will lead to substrate 1 is larger, so that
Substrate 1 will appear slight to lower recess, influence the cutting quality of cutting die.The back side of substrate 1 is set by multiple magnetic 4,
To the absorption that substrate 1 is assisted, the depression problem of aforesaid substrate 1 is avoided, guarantees the quality of cutting die cut.Specifically answering
Magnet can be used in used time, magnetic 4, is adsorbed on the manipulator of die-cutting machine by magnetic attraction, and such adsorbed state is being dismantled
When it is also more convenient, in order to the use of cutting die.
In the present embodiment, multiple magnetic 4 can be according to matrix arrangement, can also be according to the shaped formation of certain rule, for example, four
Side shape, pentagon, the shapes such as hexagon.Preferably, multiple magnetic 4 are close to the intermediate position of substrate 1, one of magnetic 4
It may be provided at the center of substrate 1.Preferably, magnetic 4 is plate, is embedded at the back side of substrate 1, and the surface of magnetic 4
It is flushed with the back side of substrate 1.
Multiple reference Fig. 2 and Fig. 3, further, the side of substrate 1 offers hand-held position 11.Hand-held position 11 is that bar shaped is poroid,
Its hand size for adapting to human body, convenient for taking for cutting die.Preferably, the quantity for holding 11 is multiple, multiple hand-held positions 11
It is respectively arranged on two opposite sides of substrate 11.The quantity of hand-held position 11 in the present embodiment is four, and four hand-held positions 11 are divided
The side of substrate 1 is not set two-by-two.
Multiple reference Fig. 2, further, 1 front of substrate is provided with nameplate region 12.Nameplate region 12 is located at the side of substrate 1
Side.Nameplate region 12 describes the essential information of cutting die, convenient for the management of cutting die.When specific setting, nameplate region 12 is located at phase
To between the hand-held position 11 of setting.Preferably, the front of substrate 11 is additionally provided with arrow 13, and arrow when convenient for storage refers to
Draw, is also convenient for being assemblied in the guide that die-cutting machine manipulator hand is, in specific setting, arrow 13 and 12 phase of nameplate region
It is right.
It is the portion the A enlarged drawing of Fig. 2 in the present embodiment with continued reference to Fig. 2 and Fig. 4, Fig. 4.Further, multiple rectangle blades
Slot 2 is arranged in the front of substrate 1 in length and breadth；Wherein, multiple rectangle blade slots 2 of longitudinal arrangement are spaced setting, and transversely arranged is more
Splice setting in a rectangle blade slot 2 between two neighboring rectangle blade slot 2.Preferably, two neighboring rectangle blade slot 2 splices
The stitching portion of setting is provided with arc-shaped transition structure 5.
It is understood that screen mobile phone has R corner structure comprehensively, rectangle blade slot 2 is also required to setting R corner structure to adapt to
The structure of comprehensive screen mobile phone, the stitching portion between two rectangle blade slots 2 so mutually spliced just will form an acute angle, and
When cutting die cuts polaroid, the stress of acute angle stitching portion is concentrated, may result in cut it is cracked, and by two squares
Arc-shaped transition structure 5 is arranged in the stitching portion of shape blade slot 2, it is possible to reduce and stitching portion cuts stress, the appearance of Crack prevention,
Subsequent grinding process, in the redundance for grinding away arc-shaped transition structure 5, to obtain qualified product.Arc in the present embodiment
The arc chord angle that radius is 0.5mm can be used in transition structure 5.
Multiple reference Fig. 4, further, rectangle blade slot 2 is provided with extension 21.Extension 21 is arcuate extents, specific
It is the inside by rectangle blade slot 2 towards the miniature arcuate structure of protrusion outside outside, stress is further reduced when cutting, into one
Step ensure that the cutting quality of polaroid.In subsequent grinding, which is milled away.Extension 21 in the present embodiment is
0.3mm。
Cutting die in the present embodiment further includes ventilating groove (not shown), gas discharge when in order to cut.This reality
The substrate 1 applied in example is made of Finland's plank.Rectangle blade slot 2 and hole shape blade slot 3 are using mountain mirror surface knife system in Japan
At.
To sum up: the polaroid in the present embodiment exempts from the production technology that drills, and when being die cut polaroid, while being die cut out polaroid
Hole, reduce the processes such as drilling to stack of laminations, hole grinding and hole cleaning, so reduce apply shield comprehensively in mobile phone it is inclined
The mating plate production time, in specific implementation, compared with the existing technology in process, the production process of each stack of laminations reduces 30
The time of second, improve the production efficiency 30% or so of polaroid.
Upper is only embodiments of the present invention, is not intended to restrict the invention.To those skilled in the art,
The invention may be variously modified and varied.All any modifications made in spirit and principles of the present invention, equivalent replacement,
Improve etc., it should all be included within scope of the presently claimed invention.
Claims (10)
1. a kind of polaroid exempts from the production technology that drills characterized by comprising
Clean mother matrix；
The mother matrix after cleaning is die cut；The mother matrix after cross cutting forms multiple polaroids, and each polarisation
The hole that the same position of piece offers；
Multiple polaroid overlappings, form stack of laminations；The hole of multiple polaroids in stack of laminations face one by one, makes
It obtains and forms channel in the stack of laminations；
Edging processing is carried out to the stack of laminations.
2. polaroid according to claim 1 exempts from the production technology that drills, which is characterized in that carry out edging to the stack of laminations
While processing, blow to the channel in the stack of laminations.
3. polaroid according to claim 2 exempts from the production technology that drills, which is characterized in that from the lower direction of the stack of laminations
The top of the stack of laminations blow to the channel in the stack of laminations.
4. polaroid according to claim 1 exempts from the production technology that drills, which is characterized in that carry out edging to the stack of laminations
After processing, further includes:
To edging, treated that polaroid detects.
5. polaroid according to claim 1 exempts from the production technology that drills, which is characterized in that in cleaning mother matrix step, stick
Mother matrix is cleaned on the surface of patch mother matrix.
6. -5 any polaroids exempt from the production technology that drills according to claim 1, which is characterized in that the mother matrix after cleaning
In the step of being die cut, the cutting die that the cross cutting uses includes substrate (1), multiple rectangle blade slots (2) and multiple hole shapes
Blade slot (3)；Multiple rectangle blade slots (2) and multiple hole shape blade slots (3) are set to the front of the substrate (1), and more
A hole shape blade slot (3) is arranged in a one-to-one correspondence respectively in multiple rectangle blade slots (2).
7. polaroid according to claim 6 exempts from the production technology that drills, which is characterized in that the hole shape blade slot (3) is leaned on
It is bordering on one jiao of the rectangle blade slot (2).
8. polaroid according to claim 6 exempts from the production technology that drills, which is characterized in that the cutting die further includes multiple magnetic
It inhales (4)；Multiple magnetic (4) are set to the back side of the substrate (1).
9. polaroid according to claim 6 exempts from the production technology that drills, which is characterized in that multiple rectangle blade slots
(2) it is arranged in the front of the substrate (1) in length and breadth；Wherein, multiple rectangle blade slot (2) interval settings of longitudinal arrangement,
Two neighboring rectangle blade slot (2) splicing setting in transversely arranged multiple rectangle blade slots (2).
10. polaroid according to claim 9 exempts from the production technology that drills, which is characterized in that the two neighboring rectangle knife
The stitching portion of sword slot (2) splicing setting is provided with arc-shaped transition structure (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747272.0A CN110370692B (en) | 2019-08-14 | 2019-08-14 | Polaroid drilling-free production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747272.0A CN110370692B (en) | 2019-08-14 | 2019-08-14 | Polaroid drilling-free production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110370692A true CN110370692A (en) | 2019-10-25 |
| CN110370692B CN110370692B (en) | 2020-12-01 |
Family
ID=68259163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910747272.0A Active CN110370692B (en) | 2019-08-14 | 2019-08-14 | Polaroid drilling-free production process |
Country Status (1)
| Country | Link |
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| CN (1) | CN110370692B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710457A (en) * | 2020-12-17 | 2021-04-27 | 江西富益特显示技术有限公司 | Polaroid hole detection equipment |
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| CN101695844A (en) * | 2009-10-18 | 2010-04-21 | 苏州达信科技电子有限公司 | Cutting die device |
| CN204658558U (en) * | 2015-05-08 | 2015-09-23 | 东莞市颖锋光电材料有限公司 | A kind of blooming hole punched device |
| CN106154387A (en) * | 2016-06-30 | 2016-11-23 | 惠州市富丽电子有限公司 | A kind of production technology of polaroid |
| CN108387965A (en) * | 2018-02-07 | 2018-08-10 | 深圳市鸿展光电有限公司 | The processing method of polaroid applied to abnormity screen |
| CN109476035A (en) * | 2016-08-02 | 2019-03-15 | 日东电工株式会社 | Cutting die, using the cutting die film process for stamping and have the stamping device of the cutting die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695844A (en) * | 2009-10-18 | 2010-04-21 | 苏州达信科技电子有限公司 | Cutting die device |
| CN204658558U (en) * | 2015-05-08 | 2015-09-23 | 东莞市颖锋光电材料有限公司 | A kind of blooming hole punched device |
| CN106154387A (en) * | 2016-06-30 | 2016-11-23 | 惠州市富丽电子有限公司 | A kind of production technology of polaroid |
| CN109476035A (en) * | 2016-08-02 | 2019-03-15 | 日东电工株式会社 | Cutting die, using the cutting die film process for stamping and have the stamping device of the cutting die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112710457A (en) * | 2020-12-17 | 2021-04-27 | 江西富益特显示技术有限公司 | Polaroid hole detection equipment |
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| CN110370692B (en) | 2020-12-01 |
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