CN109319220B

CN109319220B - Fixed film for producing curved glass cover plate

Info

Publication number: CN109319220B
Application number: CN201810106665.9A
Authority: CN
Inventors: 罗会才; 李金明
Original assignee: Shenzhen Fengtai Industrial Technology Co ltd
Current assignee: SHENZHEN FENGTAI INDUSTRIAL TECHNOLOGY Co.,Ltd.
Priority date: 2018-02-02
Filing date: 2018-02-02
Publication date: 2021-10-22
Anticipated expiration: 2038-02-02
Also published as: CN109319220A

Abstract

The invention discloses a fixed film for producing a curved glass cover plate, which comprises a bearing part and a positioning part, wherein the shape of the positioning part is matched with that of an explosion-proof film; the positioning part is respectively connected with the bearing part through two opposite side edges of the positioning part, and the two opposite side edges are pre-cut; the bearing part comprises a first fixing hole and a second fixing hole, and the first fixing hole and the second fixing hole are respectively positioned at two opposite sides of the positioning part and used for tensioning the two opposite side edges. The fixing film is beneficial to fixing the explosion-proof film, improving the accuracy and the referability of acquiring the position data of the explosion-proof film, ensuring the accurate alignment of the glass substrate and the explosion-proof film, having high alignment precision, having higher bonding precision after the joint of the positioning part and the bearing part is pre-cut, avoiding the generation of bubbles and greatly improving the qualification rate of the curved glass cover plate produced by the fixing film.

Description

Fixed film for producing curved glass cover plate

Technical Field

The invention relates to the attachment of a curved glass substrate and an explosion-proof film, in particular to a fixing film for producing a curved glass cover plate.

Background

With the development of electronic products, glass cover plates of electronic products, such as glass cover plates of smart phones, have evolved from pure planes to curved surfaces in the past, 2.5D glass cover plates are very popular with users, and with the maturity of 3D glass cover plate technology, the design and application level is not limited to small and medium sized products, and the application of 3D glass cover plates to mobile phone outer covers, shells or rear covers, even flat computer housings, gradually becomes a popular trend in the future.

The glass cover plate comprises a glass substrate and an explosion-proof membrane, the explosion-proof membrane is attached to the glass substrate and used for avoiding safety risks when the glass substrate is broken, the explosion-proof membrane can also play a role in decorating the glass cover plate, and the explosion-proof membrane is generally attached to the inner side face of the glass substrate during specific attachment.

Because the prior method for bonding the pure-plane glass substrate and the inner film generally realizes the accurate alignment and bonding of the rupture membrane and the glass substrate by aligning the corners of the rupture membrane and the glass substrate, the glass cover plate is pure-plane, has no arc design, is easy to bond and has higher yield, and the specific bonding form comprises the die alignment and bonding, the manual alignment and bonding and the alignment and bonding through a CCD camera.

However, with the application of the curved glass substrate, no matter the 2.5D glass cover plate or the 3D glass cover plate, four corners of the curved glass cover plate are arc-shaped, and no clear and easily-recognizable corner end point exists, the conventional method for attaching the explosion-proof film and the glass substrate by aligning the corners cannot accurately align and attach the curved glass substrate and the inner film, and the problems of large attachment tolerance, low attachment precision, easy generation of bubbles, low production efficiency and yield and the like exist no matter the mold is aligned and attached, or the manual alignment and attachment is performed, or the CCD camera is aligned and attached. Therefore, there is a need to improve the above deficiency.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the fixing film for producing the curved glass cover plate, which can accurately position the explosion-proof film and is beneficial to accurately aligning and laminating the curved glass substrate and the explosion-proof film. The invention is realized by the following technical scheme: a fixing film for producing curved glass cover plate comprises a bearing part and a positioning part, wherein,

the shape of the positioning part is matched with that of the explosion-proof membrane, the positioning part comprises an adhesive layer, and the adhesive layer is used for adhering and positioning the explosion-proof membrane;

the positioning part is respectively connected with the bearing part through two opposite side edges of the positioning part, and the two opposite side edges are pre-cut;

the bearing part comprises a first fixing hole and a second fixing hole, and the first fixing hole and the second fixing hole are respectively positioned at two opposite sides of the positioning part and used for tensioning the two opposite side edges.

Preferably, the bearing part comprises a first ear part and a second ear part, the first fixing hole is arranged on the first ear part, and the second fixing hole is arranged on the second ear part.

Preferably, the fixing film sequentially comprises a protective film layer, a bonding glue layer and a bearing film layer, wherein the protective film layer can be torn off, and the bonding glue layer comprises the bonding layer.

Preferably, the side edges of the positioning part are connected with the bearing part, and the side edges are pre-cut.

Preferably, the precutting treatment is precutting from the outside of the carrier film layer to the inside of the carrier film layer.

Preferably, the intersection angle of two adjacent sides of the positioning part is processed by a reverse arc angle.

Preferably, the intersection angle of two adjacent side edges of the positioning part is processed by a reversed sector angle, and the side edge of the positioning part is in a convex edge structure.

Preferably, the straight line where the first fixing hole and the second fixing hole are located is perpendicular to the two opposite side edges.

Preferably, the material of the carrier film layer is a PET material.

The fixing film is beneficial to fixing the explosion-proof film, improving the accuracy and the referability of acquiring the position data of the explosion-proof film, ensuring the accurate alignment of the glass substrate and the explosion-proof film, having high alignment precision, having higher bonding precision after the joint of the positioning part and the bearing part is pre-cut, avoiding the generation of bubbles and greatly improving the qualification rate of the curved glass cover plate produced by the fixing film.

Drawings

The invention is described in further detail below with reference to the figures and specific examples.

FIG. 1 is a schematic structural view of a glass substrate placed on a first bonding portion according to an embodiment of the invention;

FIG. 2 is a schematic structural view of an anti-explosion membrane disposed on a second bonding portion according to an embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of a cushion mold according to an embodiment of the present invention;

FIG. 4 is a front view of one embodiment of a holding film according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view along AA in FIG. 4;

FIG. 6 is a front view of another embodiment of a holding film according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line BB of FIG. 6;

FIG. 8 is a schematic view of the positioning portion of the fixing film in FIG. 6;

FIG. 9 is a schematic structural diagram of an explosion-proof membrane according to an embodiment of the present invention;

FIG. 10 is a structural view illustrating a state where the rupture disk of FIG. 9 is attached to the fixing membrane of FIG. 6;

FIG. 11 is a schematic structural view of a lower mold for fixing a film according to an embodiment of the present invention;

fig. 12 is a structural diagram illustrating a state that the fixing film of fig. 10 is limited to the lower mold of fig. 11.

In the figure, the reference numerals correspond to that in the figure, a fixing film 1, a protective film 11, an adhesive glue layer 12, a carrying film layer 13, a positioning portion 100, a convex edge structure 101, a first ear 102, a second ear 103, a precut line 2, a first fixing hole 31, a second fixing hole 32, a glass substrate 4, a first feature 40, a first alignment point 401, a first alignment edge 41, an opening 5, an explosion-proof film 6, a second feature 60, a second alignment point 601, a second alignment edge 61, a first protective film tearing hand 62, a second protective film tearing hand 63, an upper die 7, a lower die 8, a carrying table 80, a supporting surface 81, a fixing column 82 and a cushion die 9.

Detailed Description

The invention is further described with reference to the following figures and embodiments:

in the attaching method for producing the curved glass cover plate according to the embodiment, the curved glass substrate is attached to the explosion-proof membrane through the position detection device, the calculation device, the control device and the attaching device, the glass substrate includes the first characteristic portion, the explosion-proof membrane includes the second characteristic portion, and the attaching method includes the following steps:

s1, limiting the glass substrate and the explosion-proof membrane on the bonding device;

s2, collecting data of the edge and the first characteristic part of the glass substrate through the position detection device;

s3, acquiring data of the edge and the second characteristic part of the rupture membrane through a position detection device;

s4, calculating a first alignment edge and a second alignment edge according to the data of the edge of the S2 glass substrate and the data of the edge of the S3 explosion-proof film through a calculating device, and calculating a first alignment point and a second alignment point according to the data of the S2 first characteristic part and the data of the S3 second characteristic part;

and S5, the control device controls the bonding device to align the glass substrate and the explosion-proof film and bond the glass substrate and the explosion-proof film in a mode of aligning the first alignment edge and the second alignment edge and aligning the first alignment point and the second alignment point.

In specific implementation, as shown in fig. 1-2, the curved glass substrate 4 includes a first feature portion 40, the rupture disk 6 includes a second feature portion 60, and the first feature portion 40 and the second feature portion 60 are corresponding key through openings during bonding.

The attaching device preferably comprises a first attaching portion and a second attaching portion, the first attaching portion is used for limiting the glass substrate 4, the second attaching portion is used for limiting the explosion-proof membrane 6, the first attaching portion preferably comprises a first moving mechanism and an upper die 7, the control device can control the first moving mechanism to rotate the upper die 7 from a downward position to an upper position, stop moving (namely a first collecting position) after rotating from the upper position to the downward position, transversely and linearly move the upper die 7 to the position above the attaching position, vertically and linearly move the upper die 7 for attaching, the upper die 7 preferably comprises an air suction nozzle device, and the glass substrate 4 is preferably adsorbed and positioned on the upper die 7 through the air suction nozzle device; the second attaching portion preferably comprises a second moving mechanism and a lower die 8, the control device can control the second moving mechanism to adjust the position of the lower die 8 in the transverse plane, the rupture membrane 6 is limited on the lower die 8, and in the meantime, the rupture membrane attaching portion preferably further comprises a cushion die 9, the cushion die 9 is limited on the lower die 8, the rupture membrane 6 is limited on the cushion die 9, the outer surface of the cushion die 9 is preferably matched with the attaching surface of the glass substrate 4, and the material of the rupture membrane attaching portion is preferably a silica gel material.

The position detection device preferably comprises a first CCD camera and a second CCD camera, and the first CCD camera and the second CCD camera preferably perform position data acquisition based on the same position coordinate reference system so as to facilitate data calculation. The first CCD camera device preferably includes at least two CCD cameras, one of which is used for acquiring data of the first feature 40, and the other is used for acquiring data of the edge of the glass substrate 4, and the CCD camera of the first CCD camera device is preferably arranged at a downward position (i.e., a first acquisition position) facing the upper mold 7, and has a lens of the CCD camera oriented perpendicular to the plane of the glass substrate 4, and more preferably, a CCD camera is positioned directly below the first feature 40, and this structure can accurately acquire data of the first feature 40 without being affected by the curved surface and thickness of the glass substrate 4 on the accuracy of the data. The second CCD camera device preferably comprises a third motion mechanism and a CCD camera, the CCD camera is fixedly arranged at a motion part of the third motion mechanism, the control device can control the third motion mechanism to enable the motion part of the third motion mechanism to move and drive the CCD camera to do linear motion, and enable the camera to move to a second acquisition position, namely, the camera stops moving after the lower die 8 is arranged above the lower die to acquire data of the rupture membrane 6, the second CCD camera device preferably comprises at least two CCD cameras, one CCD camera is used for acquiring data of the second characteristic part 60, the other CCD camera is used for acquiring data of the edge of the rupture membrane 6, preferably, when the CCD camera of the second CCD camera device is in the second acquisition position, the lens orientation of the CCD camera is vertical to the plane of the rupture membrane 6, more preferably, one CCD camera is arranged right above the second characteristic part 60, and the structure can accurately acquire the data of the second characteristic part 60, and is not influenced by the shape of the explosion-proof membrane 6 on the accuracy of data.

The calculation device preferably comprises a computer, and the computer calculates the first alignment edge, the second alignment edge, the first alignment point 401 and the second alignment point 601 according to the set operation parameter rule according to the data of the edge of the glass substrate 4 and the first characteristic part 40 acquired by the first CCD camera when the glass substrate 4 is limited on the upper die 7 and the upper die 7 is in the downward position, that is, the glass substrate 4 is in the first acquisition position, and according to the data of the edge of the explosion-proof membrane 6 and the second characteristic part 60 acquired by the second CCD camera in the second acquisition position. In particular, the calculated parameter rules preferably include physical parameters of the glass substrate 4 and/or the rupture disk 6, such as length, width, height, thickness, etc. The first alignment edge 41 is preferably a reference edge of the glass substrate 4, and the second alignment edge 61 is preferably a reference edge of the explosion-proof film 6. The first alignment point 401 is preferably a reference point for the center point of the first feature 40 and the second alignment point 601 is preferably a reference point for the center point of the second feature 60.

The control device controls the laminating device to laminate based on the motion reference data obtained by calculation of the calculation device, and particularly controls the second movement mechanism to align the first alignment edge and the second alignment edge and align the first alignment point 401 and the second alignment point 601 after the glass substrate 4 moves to the position above the laminating position along with the transverse linear motion of the upper die 7, so that the first movement mechanism is controlled to enable the glass substrate 4 to move along with the vertical linear motion of the upper die 7, and the glass substrate 4 and the explosion-proof film 6 are accurately aligned and laminated together.

According to the method, the reference point and the reference edge are aligned, so that the curved glass substrate and the explosion-proof film can be accurately aligned and attached, the attachment precision is high, the qualified rate of the curved glass cover plate is greatly improved, the automation degree is high, and the production efficiency is high.

In some embodiments, on the basis of the above embodiments, the explosion-proof membrane 6 is preferably limited to the second attaching portion by a fixing membrane. The setting of fixed film does benefit to the fixed of rupture membrane 6 to do benefit to and improve the accuracy and the referability of gathering the positional data, further ensure to align the laminating with glass substrate 4 and rupture membrane 6 accuracy.

As an embodiment of the fixing film, referring to fig. 4 together, the fixing film 1 includes a bearing portion and a positioning portion, the shape of the positioning portion is adapted to the shape of the rupture film 6, the positioning portion includes an adhesive layer, and the adhesive layer is used for adhering and positioning the rupture film 6; the positioning part is respectively connected with the bearing part through two opposite side edges of the positioning part, and the two opposite side edges are pre-cut; the bearing part comprises a first fixing hole 31 and a second fixing hole 32, and the first fixing hole 31 and the second fixing hole 32 are respectively positioned at two opposite sides of the positioning part for tensioning two opposite side edges of the positioning part.

Specifically, the shape of the positioning part is preferably larger than or equal to that of the rupture membrane 6, so that the rupture membrane 6 is completely attached to the positioning part, and in order to adapt to the accuracy error of attachment of the rupture membrane 6 and the positioning part, a certain compensation amount is preferably reserved in the shape of the positioning part for adapting to the attachment error; line 2 in advance by subtend both sides limit form through the processing of cutting in advance, the effect that one of effect in advance lies in playing the effect of connecting location portion and carrier part before the laminating, can fix rupture membrane 6, and avoid external factors such as machine vibrations, air current disturbance to make rupture membrane 6's position change, the second effect of cutting in advance lies in when glass substrate 4 and rupture membrane 6 laminating, under the deformation effect that rupture membrane 6 produced because of the laminating, tear location portion and carrier part in 2 departments of cutting in advance and leave, this structure does benefit to the production yield of avoiding the bubble, does benefit to the production yield that improves curved surface glass apron. The material of the fixing film 1 is preferably a PET material which is not easily deformed and shrunk except for the adhesive layer, and has a good shape retaining effect and a good positioning and fixing effect.

In some embodiments, on the basis of the above-mentioned embodiment of the fixing film, it is preferable that the carrying portion includes a first ear portion 102 and a second ear portion 103, the first fixing hole 31 is disposed through the first ear portion 102, and the second fixing hole 32 is disposed through the second ear portion 103. The structure is favorable for enabling the explosion-proof membrane 6 to be arc-surface-shaped when the fixed membrane 1 is limited at the second laminating part, and is favorable for laminating the explosion-proof membrane 6 and the glass substrate 4 with the curved surface from the middle part to two sides, thereby further avoiding the generation of bubbles and improving the production yield.

In some embodiments, on the basis of the above-mentioned fixing film embodiment, referring to fig. 5 together, the positioning portion and the bearing portion each include a protective film layer 11, an adhesive glue layer 12 and a bearing film layer 13 in sequence, the protective film layer 11 can be torn off, and the adhesive glue layer 12 includes an adhesive layer. The protective film layer 11 can play the role of protecting the bonding layer and the bearing film layer 13, can avoid the bonding layer from being polluted by foreign matters, ensures the bonding effect, is favorable for ensuring the smoothness of the appearance surface of the bearing film layer 13, and can tear the protective film layer 11 during use. Because the bearing part is also provided with the adhesive glue layer 12, the bearing part can play a role of adhering foreign matters when in use, and the foreign matters and impurities are prevented from being mixed into the binding surface to a certain extent.

In some embodiments, on the basis of the above-mentioned embodiment of the fixing film, referring to fig. 6 to 7 together, the side edges of the positioning portion are connected to the bearing portion, and the side edges are pre-cut. This structure further does benefit to the fixed of supporting part to location portion, and it is better to bear the weight of the location effect, and rupture membrane 6 is better through fixed film 1 spacing cambered surface effect when in second laminating portion, and the laminating effect is better, and the effect of the 12 adhesion foreign matters in bonding glue layer of supporting part is bigger. Preferably, the intersection angle between two adjacent sides of the positioning portion is processed by an inverted arc angle, specifically, after the inverted arc angle is processed, the intersection angle between the bearing portion and the positioning portion may be a non-connected arc, preferably a connected and pre-cut arc. Further preferably, referring to fig. 8 together, the intersection angle between two adjacent sides of the positioning portion 100 is processed by a sector angle, and the side of the positioning portion 100 is a convex edge structure 101, specifically, after the sector angle is processed, the bearing portion and the positioning portion 100 form a through opening 5 at the intersection angle, and the shape of the through opening 5 is sector, which can further compensate the precision error of the adhesion between the anti-explosion membrane 6 and the positioning portion 100, and avoid the influence of the fixing membrane 1 on the adhesion between the corner of the anti-explosion membrane 6 and the glass substrate 4, so that the corner of the anti-explosion membrane 6 is adhered to the glass substrate 4 more tightly, and further avoid the generation of bubbles.

In some embodiments, on the basis of the above embodiment of the fixing film, when the fixing film 1 is implemented by using the protective film layer 11, the adhesive glue layer 12 and the carrier film layer 13, the precutting process is preferably precut from the outside of the carrier film layer to the carrier film layer, preferably precut from the protective film layer 11 to the inside of the carrier film layer 13 from top to bottom, and may be precut from the bottom surface of the carrier film layer 13 to the inside of the carrier film layer 13 from bottom to top.

In some embodiments, on the basis of the above embodiment of the fixing film, the straight line of the first fixing hole 31 and the second fixing hole 32 is perpendicular to the two opposite sides. The structure is further beneficial to the attachment of the explosion-proof membrane 6 and the curved glass substrate 4 from the middle part to the two sides, preferably from the middle part to the two sides symmetrically.

In some embodiments, when the rupture disk 6 is limited to the second joint portion by the fixing membrane 1, as shown in fig. 9-12, in operation, the protecting membrane on the bottom surface of the rupture disk 6 is torn by the second protecting membrane tearing hand 63, the protecting membrane layer 11 of the fixing membrane 1 is torn, the rupture disk 6 is bonded to the positioning portion 100 by the adhesive glue layer 12, accordingly, the lower mold 8 of the second joint portion includes a supporting surface 81 for supporting the ear portion and fixing posts 82 for matching with the fixing holes, the cushion mold 9 is limited to the bearing table 80, the first fixing holes 31 and the second fixing holes 32 of the fixing membrane 1 are respectively sleeved on the fixing posts 82, the fixing membrane 1 is linearly tensioned, and finally the protecting membrane on the joint surface on the top of the rupture disk 6 is torn by the first protecting membrane tearing hand 62, so that the limiting operation of the rupture disk 6 is completed. Preferably, the first fixing hole 31 has a semicircular shape at both ends and a rectangular shape in the middle, and the second fixing hole 32 has a circular shape, which facilitates the installation and removal of the fixing film 1 at the fixing post 82. After the glass substrate 4 and the explosion-proof membrane 6 are attached, the positioning part 100 is torn off, which is simple and convenient.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

The invention is described above by way of example, and it is obvious that the implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without modification.

Claims

1. A fixed film for producing a curved glass cover plate, the glass cover plate comprises a glass substrate and an explosion-proof film, the explosion-proof film is attached to the inner side surface of the glass substrate, the fixed film is characterized by comprising a bearing part and a positioning part, wherein,

the bearing part comprises a first fixing hole and a second fixing hole, the first fixing hole and the second fixing hole are respectively positioned at two opposite sides of the positioning part and used for tensioning the two opposite side edges, and straight lines where the first fixing hole and the second fixing hole are positioned are perpendicular to the two opposite side edges of the positioning part;

the bearing part with location portion all includes the bonding glue layer, the bonding glue layer includes the adhesive linkage.

2. The securing film as claimed in claim 1, wherein the carrier portion includes a first ear portion and a second ear portion, the first securing hole is formed through the first ear portion, and the second securing hole is formed through the second ear portion.

3. The fixing film according to claim 1, wherein the bearing portion and the positioning portion each further comprise a protective film layer and a bearing film layer, the protective film layer, the adhesive glue layer and the bearing film layer are sequentially arranged, and the protective film layer can be torn away.

4. The fastening film according to claim 3, wherein the precut treatment is precut from outside the carrier film layer into the carrier film layer.

5. The fixing film according to claim 1, wherein an intersection angle of adjacent two side edges of the positioning portion is chamfered.

6. The fixing film according to claim 1, wherein the intersection angle between two adjacent sides of the positioning portion is subjected to a reverse fan-shaped corner treatment, and the side of the positioning portion is in a convex edge structure.

7. The fastening film of claim 3, wherein the material of the carrier film layer is PET material.