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CN-121989545-A - Device and method for attaching rear cover and membrane of 3D curved glass

CN121989545ACN 121989545 ACN121989545 ACN 121989545ACN-121989545-A

Abstract

The invention discloses a device and a method for attaching a rear cover and a diaphragm of 3D curved glass, wherein a frame is used as a carrier, a feeding mechanism, a material moving mechanism, a pre-pressing adjusting mechanism, a double-station attaching platform, a vacuum extrusion mechanism and a rotating mechanism are integrated in a modularized manner, a plasma cleaning mechanism and a dust-free control system are matched, a jig of the attaching platform adopts an aluminum alloy polishing oxidation material, a silica gel layer is arranged on an attaching surface, a linear adjusting groove is formed in a negative pressure platform of the pre-pressing adjusting mechanism, the matching angle and an air cylinder are adjusted to achieve accurate positioning, and the double-station platform and the rotating mechanism are cooperated to achieve attaching synchronous operation. The method comprises the steps of feeding and positioning, glass activation, pre-pressing calibration, membrane transfer, vacuum lamination and blanking continuous production. The invention realizes high-precision and high-efficiency lamination, the production beat is 30 seconds/piece, the energy consumption is reduced by 35%, the bubble residual rate is extremely low, the radius of the adaptation curvature is more than or equal to 3MM, and the invention is suitable for processing products such as smart phones and the like, and has strong universality and practicability.

Inventors

  • FAN XIAOMENG
  • LAN YONGGUI
  • PAN LIPING

Assignees

  • 东莞市新起航实业有限公司

Dates

Publication Date
20260508
Application Date
20260130

Claims (10)

  1. 1. A device for attaching a rear cover of 3D curved glass to a membrane is characterized by comprising a frame (8), a feeding mechanism (1), a first material moving mechanism (2), a pre-pressing adjusting mechanism (3), a second material moving mechanism (4), an attaching platform (5), a vacuum extrusion mechanism (6) and a rotating mechanism (7), wherein the feeding mechanism (1), the pre-pressing adjusting mechanism (3), the attaching platform (5) and the rotating mechanism (7) are fixedly arranged on the frame (8), a jig (51) is arranged on the attaching platform (5), the jig (51) is made of an aluminum alloy polishing oxidation material, a linear adjusting groove (331) is formed in a negative pressure platform (33) of the pre-pressing adjusting mechanism (3), and the rotating mechanism (7) is in transmission connection with the attaching platform (5) and is used for driving the attaching platform (5) to rotate below the vacuum extrusion mechanism (6).
  2. 2. The device for attaching the rear cover to the membrane of the 3D curved glass, which is disclosed in claim 1, is characterized by further comprising a plasma cleaning mechanism, wherein the plasma cleaning mechanism is used for carrying out activation treatment on the surface of the rear cover (91) of the 3D curved glass to enable the dyne value of the surface of the glass to be more than 36, and the device is further integrated with a dust-free control system, and the dust-free control system is arranged at the top of the frame (8).
  3. 3. The device for attaching the rear cover to the membrane of the 3D curved glass according to claim 1, wherein the attaching surfaces of the jig (51) and the membrane (9) and the rear cover (91) of the 3D curved glass are provided with silica gel layers, and the straight-shaped adjusting groove (331) extends along the length direction of the negative pressure platform (33).
  4. 4. The device for bonding the rear cover and the membrane of the 3D curved glass according to claim 1, wherein the bonding platform (5) comprises more than two bonding platforms, the bonding platform (5) comprises a base (52), a cover plate (53) and a pressing cavity (54), the cover plate (53) is hinged with the base (52), the pressing cavity (54) is matched and covered with a vacuum cavity (63) of a vacuum extrusion mechanism (6), and the synchronous carrying out of discharging and vacuum bonding is supported.
  5. 5. The device for attaching the rear cover to the membrane of the 3D curved glass according to claim 1, wherein the vacuum extrusion mechanism (6) comprises an up-and-down moving cylinder (61), an extrusion cylinder (62) and a vacuum cavity (63), the up-and-down moving cylinder (61) is fixed at the top of the frame (8), an output end is fixedly connected with the vacuum cavity (63) and used for driving the vacuum cavity (63) to vertically lift, the extrusion cylinder (62) is arranged inside the vacuum cavity (63), and the output end is connected with an air bag soft attaching assembly.
  6. 6. The device for attaching the rear cover to the membrane of the 3D curved glass according to claim 1, wherein the rotating mechanism (7) comprises a rotating motor (71), a speed reducer (72), a pulley (73) and a rotary table (74), the rotating motor (71) is in transmission connection with the pulley (73) through the speed reducer (72), the rotary table (74) is fixedly connected with the base (52) of the attaching platform (5), and the rotary motor (71) drives the rotary table (74) to drive the attaching platform (5) to rotate and switch stations.
  7. 7. The device for attaching the rear cover to the membrane of the 3D curved glass according to claim 1, wherein the feeding mechanism (1) comprises a feeding motor (11), a feeding screw (12), a guide rail (13), a feeding platform (14), a left side adjusting mechanism (15) and a front side adjusting mechanism (16), the feeding motor (11) is in transmission connection with the feeding platform (14) through the feeding screw (12), the feeding platform (14) is in sliding connection with the guide rail (13), the left side adjusting mechanism (15) is provided with a left side adjusting knob (151), the front side adjusting mechanism (16) is provided with a front side adjusting knob (161), the pre-pressing adjusting mechanism (3) further comprises a feeding motor (31), an angle adjusting motor (32), an end adjusting mechanism (34) and a side adjusting mechanism (35), the angle adjusting motor (32) is connected with the negative pressure platform (33) through a rotating shaft (321), the end adjusting mechanism (34) is provided with an end adjusting cylinder (341), the side adjusting mechanism (35) is provided with a side adjusting cylinder (351), the second material moving mechanism (4) comprises a horizontal moving mechanism (41) and an adsorption disc (43) is provided with an adsorption disc (43).
  8. 8. A method for attaching a 3D curved glass back cover to a membrane based on the apparatus of any one of claims 1-7, comprising the steps of: S1, feeding positioning, starting a feeding motor (11) of a feeding mechanism (1), driving a feeding platform (14) to move along a guide rail (13) through a feeding screw rod (12), and conveying a membrane (9) to a preset material taking position; S2, activating glass, and performing activation treatment on the surface of a rear cover (91) of the 3D curved glass by a plasma cleaning mechanism; s3, pre-pressing and calibrating, namely placing a 3D curved glass rear cover (91) on a negative pressure platform (33) of a pre-pressing and adjusting mechanism (3), wherein the negative pressure platform (33) generates negative pressure to adsorb and fix the 3D curved glass rear cover (91), a feeding motor (31) drives the negative pressure platform (33) to move to a calibrating station, an angle adjusting motor (32) drives a rotating shaft (321) to adjust the inclination angle of the glass rear cover, an end adjusting cylinder (341) and a side adjusting cylinder (351) respectively extend out of the end part and the side of the positioning glass rear cover, and a linear adjusting groove (331) is matched to finish accurate fine adjustment, so that the film laminating reference precision is less than or equal to +/-0.1 mm; S4, transferring the membrane, namely transferring the membrane (9) from a feeding platform (14) to the surface of a pre-pressed and calibrated 3D curved glass rear cover (91) by a first material transferring mechanism (2) to finish primary lamination; S5, vacuum lamination, wherein the second material moving mechanism (4) drives the adsorption disc (43) through the horizontal moving mechanism (41) and the vertical moving mechanism (42), the glass rear cover and the membrane after preliminary lamination are transferred to the jig (51) of the lamination platform (5), the rotating motor (71) of the rotating mechanism (7) drives the rotating disc (74) to drive the lamination platform (5) to rotate below the vacuum cavity (63), the up-and-down moving cylinder (61) drives the vacuum cavity (63) to cover on the lamination cavity (54), the vacuum pump establishes a vacuum environment at a pumping speed of 50L/S, and the extrusion cylinder (62) drives the air bag soft lamination assembly to uniformly laminate; And S6, blanking is carried out continuously, after the lamination is finished, the vacuum cavity (63) is depressurized and reset upwards, the rotary mechanism (7) drives the lamination platform (5) to rotate and reset, the cover plate (53) is opened to take out a finished product, and meanwhile, the step S1 is repeated to carry out feeding of the next batch of materials, so that continuous production is realized.
  9. 9. The method for attaching the rear cover to the membrane of the 3D curved glass according to claim 8, wherein the specific parameters of the pre-pressing calibration in the step S3 are that the adsorption pressure of the negative pressure platform (33) is 0.06-0.08MPa, the angle adjusting motor (32) drives the rotating shaft (321) to rotate, the horizontal inclination angle of the rear cover (91) of the 3D curved glass is adjusted to be 0+/-0.05 degrees, the extension pressure of the end adjusting cylinder (341) and the side adjusting cylinder (351) is 0.2-0.3MPa, and the negative pressure platform (33) is locked by a fastener in the straight adjusting groove (331) after the positioning is finished, so that the position deviation in the attaching process is prevented.
  10. 10. The method for bonding the rear cover and the membrane of the 3D curved glass according to claim 8, wherein the specific parameters of vacuum bonding in the step S5 are that the vacuum degree in the vacuum cavity (63) is maintained at-0.095 MPa to-0.1 MPa, the bonding pressure of the air bag soft bonding assembly is 0.3-0.5MPa, the bonding time is 10-15 seconds, a dust-free control system continuously works in the bonding process, ambient air is filtered in real time, the particle size of an ambient dust point is controlled to be less than or equal to 0.3 mu m, and the influence of dust point residue on bonding appearance and optical performance is avoided.

Description

Device and method for attaching rear cover and membrane of 3D curved glass Technical Field The invention relates to the technical field of lamination of a 3D curved glass cover plate, in particular to a device and a method for laminating a 3D curved glass back cover and a membrane, which are particularly applied to lamination processing of curved glass and a functional membrane of products such as smart phones, tablet computers and wearable equipment. Background The existing lamination technology of the 3D curved glass and the membrane has the following core defects: The jig is unreasonable in material and structure, the traditional bonding process adopts a bakelite plate material jig, alignment accuracy deviation is easily caused by abrasion, the hole-to-hole bonding position of the jig is not adjustable, bubbles and folds are easily generated in the bonding process, and the yield is low; the production efficiency contradicts with the energy consumption, namely, the design of single station and single cavity leads to long production beat, and the process is maintained by long-time high-temperature heating, so that the energy consumption is high and the process cost is high; The alignment precision is insufficient, the positioning of the multiple cameras needs to be subjected to mapping calibration among the cameras, the process is complex, errors are easy to introduce, and meanwhile, the inclination angle of the diaphragm cannot be accurately detected, so that the fitting deviation is caused; The laminating quality is unstable, the glue spreading mode is unreasonable, glue overflows or is unevenly distributed easily, the vacuum environment tightness is poor, the bubble residual rate is high, the structural design of the equipment is redundant, and the operation space is insufficient. In view of the above problems, the prior art has not proposed an integrated solution for integrating high-precision fixture, efficient alignment, low energy consumption and high sealing bonding, so that development of a device and a method for bonding a 3D curved glass and a membrane, which are capable of achieving precision, efficiency, quality and economy, is needed. Disclosure of Invention In view of the above, the invention provides a device and a method for attaching a rear cover to a membrane of a 3D curved glass, which aim to solve the problems of unreasonable material and structure, outstanding contradiction between production efficiency and energy consumption, insufficient alignment precision, unstable attaching quality and the like of the existing attaching technology of the 3D curved glass to the membrane in the background art, and realize attaching processing with high precision, high efficiency, low energy consumption and high stability. The laminating device adopts a modularized integrated design, takes a frame as an installation carrier, integrates a feeding mechanism, a first material moving mechanism, a pre-pressing adjusting mechanism, a second material moving mechanism, a double-station laminating platform, a vacuum extrusion mechanism and a rotating mechanism, and is provided with a plasma cleaning mechanism and a dust-free control system in a matching way, so that a full-flow automatic operation system from material feeding, surface activation, accurate calibration, pre-pressing lamination to vacuum lamination and continuous blanking is formed, excessive manual intervention is not needed, and the production continuity and consistency are effectively improved. Further, the jig of the laminating platform is made of an aluminum alloy polishing oxidation material, a silica gel layer is arranged on the laminating surface of the jig and the diaphragm, and the rear cover of the 3D curved glass, so that the jig has good structural rigidity and wear resistance, the problem of alignment deviation caused by easy wear of a traditional bakelite plate jig is avoided, the surface scratch of materials in the laminating process can be prevented, a linear adjusting groove extending along the length direction is formed in the negative pressure platform of the pre-pressing adjusting mechanism, and the angle adjusting motor, the end adjusting cylinder and the side adjusting cylinder are matched, so that the multi-dimensional accurate fine adjustment of the inclination angle, the end position and the side positioning of the rear cover of the 3D curved glass can be realized, the standard accuracy of diaphragm lamination is ensured to be less than or equal to +/-0.1 mm, and the defect that the traditional positioning cannot be accurately detected and calibrated in the inclination angle is overcome. Further, the plasma cleaning mechanism activates the surface of the rear cover of the 3D curved glass to ensure that the dyne value of the surface of the glass is more than 36, the bonding adhesive force of the membrane and the glass is improved, the dust-free control system is arranged at the top of the frame, filters ambient air in r