TWI763048B - Curved surface bonding device - Google Patents

Abstract

A curved surface bonding device including a bonding head, a carrier, a first driving unit and a fluid source is provided. The boding head driven by the first driving unit includes a body and an elastic bonding element which are jointly form a chamber. The elastic bonding element has a first bonding portion with lower Young's modulus and a second bonding portion with higher Young's modulus. The fluid source connected to the chamber for generating a first and a second fluid pressure to the chamber in stages. When the pressure of the fluid source is raised to the first fluid pressure, the first bonding portion deforms elastically to press part of a soft film to meet a curved surface bonded object. When the pressure of the fluid source is raised to the second fluid pressure, the second bonding portion presses the soft film until the soft film totally meeting the curved surface bonded object. Therefore, a mold changing is not necessary for meeting different curved surface bonded object, and bubbles could be eliminated, too.

Description

Surface bonding device

The present invention relates to a lamination device, in particular to a curved surface lamination device of a membrane.

Most of the methods used in the conventional film laminating device are to transfer the soft film to a flat stage, and correct it to a designated reference position before positioning. Then place another rigid substrate with a flat shape at the designated reference position of another plane carrier, and adjust the relative position of the plane carrier to make the film and the rigid substrate coincide or reach the target difference. value, and then use a cylindrical shaft-shaped rubber roller to continuously roll at a certain height and pressure to complete the bonding between products.

If the upper surface of a mouse with a biaxial curved surface is to be pasted with a film laminating device, an upper cover that is similar in appearance to the upper surface of the mouse must be made first. Next, place the soft membrane on the inside of the upper cover. After that, attach the soft diaphragm on the inner side of the upper cover to the upper surface of the mouse. However, this kind of bonding method is prone to bubbles, and the upper cover plate needs to be designed according to the appearance of different products. Therefore, it often takes a lot of mold opening, assembly cost and time for poor bonding effect. In addition, since the upper cover plate is hard, it is easy to collide with the mouse, causing damage to the surface of the mouse.

The invention provides a curved surface bonding device, which does not need to replace the mold with different curved surfaces to be bonded, and can also avoid the generation of air bubbles.

The present invention provides a curved surface bonding device, which is suitable for bonding a soft film to a curved surface bonding object, comprising a bonding head, a carrier, a first driving unit and a fluid source. The fitting head includes a body and an elastic fitting. The elastic fit is connected to the body. The body and the elastic fitting together form a cavity. The elastic fitting has a first fitting part and a second fitting part. The Young's modulus of the first fitting portion is smaller than the Young's modulus of the second fitting portion. The stage is arranged at a position facing the elastic fitting, and is suitable for setting the curved surface to be fitted. The soft diaphragm is suitable for being arranged between the curved surface adhered object and the elastic adherent piece. The first driving unit is connected to the bonding head for driving the bonding head toward or away from the stage. The fluid source is connected to the chamber for generating a first fluid pressure and a second fluid pressure into the chamber in stages. The first fluid pressure is less than the second fluid pressure. When the pressure of the fluid source is increased to the first fluid pressure, the first bonding portion is elastically deformed to push a first portion of the soft diaphragm to be bonded to the curved surface to be bonded. After the fluid source is increased to the second fluid pressure, the second bonding portion is elastically deformed, and the first driving unit drives the bonding head to approach the stage at the same time, and pushes a second portion of the soft diaphragm to bond to the curved surface. Laminate until the soft film is completely attached to the curved surface.

In an embodiment of the present invention, the object to be attached to the curved surface has a biaxial curved surface, and the elastic attaching member is a planar elastic attaching member.

In an embodiment of the present invention, the first bonding portion is located at the center of the second bonding portion, and the first bonding portion corresponds to one of the most convex points or the most concave points of the object to be bonded on the curved surface.

In an embodiment of the present invention, the size, shape, relative positional relationship or proportional relationship of the first bonding portion and the second bonding portion correspond to the appearance of the object to be bonded with a curved surface.

In an embodiment of the present invention, the first driving unit is a pneumatic cylinder or a hydraulic cylinder, and the bonding head is disposed on a piston part of the pneumatic cylinder or the hydraulic cylinder to drive the bonding head to approach or move away from the carrier. .

In an embodiment of the present invention, the fluid source is a pneumatic source or a hydraulic source.

In an embodiment of the present invention, the curved surface bonding device further includes a guide rail and a second driving unit. The first driving unit is movably arranged on the guide rail. The second driving unit is connected to the first driving unit, and is used for driving the first driving unit to move along the guide rail. The bonding head moves along the guide rail with the second driving unit to move the elastic bonding member to a position facing the carrier.

In an embodiment of the present invention, the second driving unit is a stepping motor or a servo motor.

In an embodiment of the present invention, the curved surface laminating device further includes a reel device disposed between the laminating head and the stage for disposing and rolling the soft film.

In an embodiment of the present invention, the curved surface laminating device further includes a conveyor belt, a plurality of carriers are arranged, and the carriers are sequentially moved to the positions corresponding to the lamination heads.

In an embodiment of the present invention, the curved surface bonding apparatus further includes a heating unit for heating the chamber or the soft membrane.

In an embodiment of the present invention, the curved surface laminating device further includes a cutting unit for cutting the soft film that is completely attached to the curved surface to be attached.

Based on the above, the curved surface laminating device according to the embodiment of the present invention can attach the soft film to the surface to be attached through the elastic laminating member, and can be used for lamination of any shape, without the need for different product shapes. Open mold design upper cover. In addition, the elastic fitting has a first fitting part and a second fitting part with different Young's modulus. Therefore, no matter whether the curved surface is concave or convex, the sticking can be started from the most concave and convex part of the object to be attached, thereby avoiding the generation of air bubbles.

The following detailed description will be given in conjunction with the accompanying drawings through specific embodiments, so as to more easily understand the purpose, technical content, characteristics and effects of the present invention.

The following examples are provided and described in detail in conjunction with the drawings. The examples are only used as examples to illustrate, and are not intended to limit the scope of the claimed protection of the present invention. For the convenience of understanding, the following embodiments use the same or similar symbols to represent the same or similar elements for description. Under the premise of possible implementation, those skilled in the art can selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments. It should be understood that unless otherwise defined, all technical terms used have the same meaning as understood by one of ordinary skill in the art. However, when some terms are described or defined in the embodiments, the interpretations of the terms are based on the descriptions or definitions of the embodiments. In addition, the directional terms mentioned in the embodiments, such as "front" or "rear", "left", "right", "up", "down", etc., only refer to the directions of the accompanying drawings. Accordingly, the directional terms used are intended to illustrate and not to limit the present invention. It should be understood that in the description of the examples and all claims that follow, the use of "and/or" includes any and all combinations of one or more of the associated listed items.

FIG. 1 is a perspective view of a curved surface bonding apparatus according to an embodiment of the present invention. Please refer to FIG. 1 , the curved surface bonding apparatus 100 includes a bonding head 110 , a stage 120 , a first driving unit 130 and a fluid source 140 . The bonding heads 110 are located above the stage 120 and are opposite to each other. A curved object 60 is mounted on the stage 120 , and a soft film 50 is located between the bonding head 110 and the curved object 60 . The first driving unit 130 and the fluid source 140 are connected to the bonding head 110 . The first driving unit 130 is used to drive the bonding head 110 to approach the carrier 120 downwardly or upwardly away from the carrier 120 along a first direction D1 , and the fluid source 140 generates fluid pressure to the bonding head 110 to move the soft diaphragm. 50 is attached to the curved surface object to be attached 60 . In this embodiment, the first driving unit 130 is a pneumatic cylinder or a hydraulic cylinder, and the bonding head 110 can be disposed on a piston part of the pneumatic cylinder or hydraulic cylinder to drive the bonding head 110 to approach or move toward the stage 120 . away from the stage 120 . However, in another not-shown embodiment, the first driving unit 130 can also be implemented by other structures capable of driving the bonding head 110 to move, such as a motor, a connecting rod, a gear, etc., which is not limited thereto.

Specifically, the bonding head 110 includes a body 112 and an elastic bonding member 114 . The elastic fitting 114 is connected to the body 112 . The body 112 and the elastic fitting 114 together form a cavity C. In this embodiment, the main body 112 is a hollow cylinder with an opening below, and the elastic fitting 114 is disposed below the main body 112 and covers the opening below the main body 112 to form a closed chamber C. The carrier 120 is disposed at a position facing the elastic fitting 114 . The soft diaphragm 50 is disposed between the curved surface adhered 60 and the elastic adherent member 114 . The fluid source 140 is connected to the chamber C for generating fluid pressure to the chamber C in stages, so as to drive the elastic fitting member 114 to deform and push the soft diaphragm 50 to fit on the curved object 60 . It is worth mentioning that, by means of stepwise pressurization, it is also possible to avoid uneven thickness of the film material and avoid the generation of air bubbles.

FIG. 2 is a top view of the elastic fitting of FIG. 1 . Please refer to FIG. 1 and FIG. 2 at the same time, the elastic bonding member 114 has a first bonding portion 114A and a second bonding portion 114B. The Young's modulus of the first bonding portion 114A is smaller than the Young's modulus of the second bonding portion 114B. Young's modulus E=σ/ε, where σ represents normal stress and ε represents normal strain. That is, when the first bonding portion 114A and the second bonding portion 114B receive the same stress, the strain of the first bonding portion 114A is greater than the strain of the second bonding portion 114B. The first bonding portion 114A may be located at the center of the second bonding portion 114B, and the first bonding portion 114A and the second bonding portion 114B may be substantially concentric in design, but not limited thereto. In the present embodiment, the elastic fitting 114 may be a thermoplastic elastomer (thermoplastic elastomer, TPE), which may be selected from styrene-based thermoplastic elastomers (TPE-S and SBC), polyolefin-based thermoplastic elastomers (TPO) , Vulcanized thermoplastic elastomer (TPV), polyurethane based thermoplastic elastomer (TPU) or polyester based thermoplastic elastomer (TPE-E) and polyamide based thermoplastic elastomer (TPE-A) any one of the classifications, Among them, polyester-based thermoplastic elastomers have the best resilience.

In addition, the size, shape, relative positional relationship or proportional relationship of the first bonding portion 114A and the second bonding portion 114B may correspond to the appearance of the curved surface bonded object 60 . For example, the size, shape, relative positional relationship or proportional relationship of the first bonding portion 114A may correspond to one of the most convex points or the most concave point of the curved surface object 60 , and the second bonding portion 114B may correspond to The curved surface is adhered to other parts of the article 60 . In this embodiment, the most protruding point of the object to be pasted on the curved surface 60 is located approximately in the center, so the first bonding portion 114A is correspondingly designed to the central portion of the second bonding portion 114B. However, in another not-shown embodiment, the shape and composition of the elastic fitting member 114 can be selected according to the fitting requirements.

In this embodiment, the curved object 60 is, for example, a lens, and may have a biaxial curved surface, and the elastic attaching member 114 is a planar elastic attaching member. In other words, in this embodiment, the plate-shaped elastic bonding member 114 is used to bond the soft film 60 to the curved object to be bonded 60 . It is worth mentioning that, since the elastic bonding member 114 has elasticity, it can completely match the appearance of the curved surface bonding object 60 when the soft film 50 is pressed to be bonded to the curved surface bonding object 60 . Therefore, the curved surface laminating device 100 can be applied to objects with various surface curvatures, and can also prevent the curved surface lamination object 60 (such as a lens) from being damaged under pressure. In addition, the elastic bonding member 114 does not need to be specially made into a curved surface, nor does it need to replace the mold of the cover plate according to the shape of the object to be bonded 60 with different curved surfaces. Therefore, a single production line can carry out the lamination of different curved surfaces at the same time, without the need to replace the cover plate.

Generally speaking, a uniaxial curved surface is like holding both ends of a piece of paper with your hands so that the middle hangs naturally (in a U-shape). At this time, the paper is curved in one direction, and the other direction is still straight. Compared with the uniaxial curved surface, the biaxial curved surface of the curved object 60 has curvature in the directions of a long axis A1 and a short axis A2, wherein the long axis A1 and the short axis A2 are perpendicular to each other. For example, biaxial surfaces can be seen on common mouse shapes.

In addition, in order to facilitate alignment, the curved surface bonding apparatus 100 may further include a guide rail 150 and a second driving unit (not shown). The first driving unit 130 is movably disposed on the guide rail 150 . The second driving unit is connected to the first driving unit 130 , and can be a stepper motor or a servo motor for driving the first driving unit 130 to move left and right along the guide rail 150 in a second direction D2 . The second direction D2 and the first direction D1 may be perpendicular to each other, and correspond to a horizontal direction and a vertical direction respectively. In this way, the bonding head 110 can move left and right along the guide rail 150 along with the second driving unit to move the elastic bonding member 114 to a position facing the stage 120 , so that the elastic bonding member 114 and the curved surface are bonded 60 positions correspond to each other. In this embodiment, the second driving unit is not limited to be a stepping motor or a servo motor.

FIG. 3 is a line graph showing the fluid pressure generated by the fluid source of FIG. 1 in stages. In Figure 3, the horizontal axis is the time, and the vertical axis is the fluid pressure generated by the fluid source, but it should be noted that the scale only represents the relative situation for reference, not the actual value. Please refer to FIG. 1 and FIG. 3 , the fluid source 140 can be an air pressure source or a hydraulic pressure source, and is connected to the chamber C through a pipeline T. Thereby, the fluid source 140 can generate a first fluid pressure P1 and a second fluid pressure P2 into the chamber C in stages. The first fluid pressure P1 is lower than the second fluid pressure P2, and can be set corresponding to the Young's modulus of the first bonding portion 114A and the Young's modulus of the second bonding portion 114B, respectively. When the pressure of the fluid source 140 increases to the first fluid pressure P1 , the first bonding portion 114A elastically deforms and pushes a first portion of the soft diaphragm 50 to be bonded to the curved object to be bonded 60 . After the fluid source 140 increases to the second fluid pressure P2, the second bonding portion 114B is elastically deformed, and the first driving unit 130 drives the bonding head 110 to approach the stage 120 at the same time, and pushes a first portion of the soft diaphragm 50 The two parts are attached to the curved surface object 60 until the soft film 50 is completely attached to the curved surface object 60 .

FIGS. 4A to 4D are cross-sectional views of the lamination process of the curved surface lamination device in FIG. 1 , and the lamination process can refer to the fluid pressure change in FIG. 3 . Please refer to FIG. 1 and FIG. 4A , firstly, the curved object 60 is placed on the stage 120 , and the soft film 50 is placed between the curved object 60 and the bonding head. At this time, the first stage of boosting can be performed, and the chamber C is gradually pressurized by the fluid source 140 until the first fluid pressure P1 is reached. During or before the boosting process, the guide rail 150 and the second driving unit can be used to drive the first driving unit 130 and the bonding head 110 to move left and right in the second direction D2, so that the elastic bonding member 114 and the curved surface object 60 are bonded Accurate alignment.

Referring to FIG. 1 and FIG. 4B again, when the interior of the chamber C reaches the first fluid pressure P1, the first fitting portion 114A is elastically deformed. At this time, the first bonding portion 114A contacts and pushes the first portion of the soft film 50 to be bonded to the most convex point of the curved surface bonding object 60 . Next, a second stage of boosting is performed, and the chamber C is gradually pressurized by the fluid source 140 until the first fluid pressure P2 is reached.

Referring to FIG. 1 and FIG. 4C again, when the inside of the chamber C reaches the second fluid pressure P2, the second fitting portion 114B is elastically deformed. At this time, the bonding head 110 can be driven by the first driving unit 130 to move toward the direction of the stage 120 along the first direction D1.

Referring to FIG. 1 and FIG. 4D again, after the inside of the chamber C reaches the second fluid pressure P2 , the third stage of boosting can be performed. In detail, in the process that the first driving unit 130 drives the bonding head 110 to move in the direction of the stage 120 along the first direction D1, the chamber C can be pressurized by the fluid source 140 at the same time, so that the soft diaphragm 50 can be pressurized at the same time. The second part of the film is attached to the curved object to be attached 60 until the soft film 50 is completely attached to the curved object to be attached 60 .

It is worth mentioning that the process of attaching the soft diaphragm 50 to the curved surface object 60 starts from the most convex point, and adopts step-by-step pressurization until it is completely attached, which can avoid the film of the soft diaphragm 50 . The thickness of the material is uneven and the generation of air bubbles is avoided. In addition, those with ordinary knowledge in the art can select the materials of the first fitting portion 114A and the second fitting portion 114B of the elastic fitting 114 according to the requirements of different expansion degrees, and determine the size, shape, relative positional relationship or proportion. relationship design.

FIG. 5 is a cross-sectional view of a curved surface bonding apparatus according to another embodiment of the present invention. Please refer to FIG. 1 and FIG. 5 , the curved surface bonding apparatus 200 of this embodiment is similar to the curved surface bonding apparatus of FIG. 1 , and the same or similar elements are denoted by the same reference numerals, which will not be repeated here. In this embodiment, the curved surface laminating device 200 further includes a reel device 260 disposed between the laminating head 110 and the stage 120 for disposing and rolling the soft film 50 . For example, the reel device 260 can be provided with a protective film 70 , and the plurality of soft films 50 are attached to the protective film 70 by electrostatic adsorption or low viscosity.

In addition, an adhesive layer (not shown) may be disposed on the other side (ie, the lower surface) of the soft film 50 opposite to the protective film 70 to adhere to the curved object 60 through the adhesive layer itself. In this embodiment, the curved surface laminating device 200 may further include a heating unit (not shown), so that the gas of the fluid source 140 is maintained at a constant temperature and delivered to the chamber C or directly heats the soft film 50 to achieve the adhesion of the adhesive layer. The lowest sticking temperature enables the soft film 50 to be effectively sticked to the curved object 60 .

In this embodiment, the curved surface bonding apparatus 200 may further include a fixing bracket 250 and a conveyor belt 270 . A plurality of carriers 120 are disposed on the conveyor belt 270 , and the carriers 120 are sequentially moved to positions corresponding to the bonding head 110 for automatic transportation and bonding. In this way, the bonding head 110 can be directly fixed on the fixing bracket 250 , and the carrier 120 can be directly moved by the conveyor belt 270 , so that the bonding head 110 and the curved surface object 60 are positioned relative to each other. In another not-shown embodiment, the carrier 120 can also be set on a two-dimensional positioning platform to perform more precise positioning, which is not limited thereto.

Further, the curved surface bonding apparatus 200 may further include a cutting unit 280, and the cutting unit 280 is, for example, a laser or a hob. After the lamination of the soft film 50 and the curved object to be attached 60 is completed, the carrier 120 can be moved along the second direction by the conveyor belt 270 to a position corresponding to the cutting unit 280 . In this way, the cutting unit 280 can be used to cut the soft film 50 that is completely adhered to the curved object 60 to be adhered. It should be noted that although the size of the soft film 50 in this embodiment is larger than that of the curved surface object 60 , a cutting unit 280 can be provided. However, in another not-shown embodiment, if the soft film 50 conforms to the shape and size of the curved object 60 to be pasted, it does not need to be cut. That is, the curved surface bonding apparatus 200 can also omit the setting of the cutting unit 280 .

To sum up, the curved surface laminating device of the above-mentioned embodiment can attach the soft film sheet to the curved surface lamination object through the elastic laminating member, and can be used for lamination of any shape, without the need for different products. Type open mold design upper cover. Therefore, the curved surface bonding device of the above-mentioned embodiment does not require additional mold opening, assembling cost and time. In addition, the elastic bonding member has a first bonding portion and a second bonding portion with different Young's modulus, which can meet the requirements of different expansion degrees. Therefore, no matter whether the curved surface is concave or convex, the lamination can be started from the most concave and convex part of the object to be attached, thereby avoiding the generation of air bubbles, and the lamination effect is good.

The above-mentioned embodiments are only to illustrate the technical ideas and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the patent scope of the present invention. That is, all equivalent changes or modifications made according to the spirit disclosed in the present invention should still be covered within the patent scope of the present invention.

50 Soft diaphragm 60 The surface is pasted 70 Protective film 100, 200 Surface Fitting Device 110 Fitting head 120 Stages 112 Ontology 114 Elastic fit 114A The first fitting part 114B Second fitting part 130 The first drive unit 140 Fluid Source 150 Rails 260 reel device 250 Fixed bracket 270 Conveyor belt 280 cutting unit A1 Long axis A2 short shaft C Chamber D1 First direction D2 Second direction P1 First fluid pressure P2 Second fluid pressure T Pipeline

FIG. 1 is a perspective view of a curved surface bonding device according to an embodiment of the present invention; FIG. 2 is a top view of the elastic fitting of FIG. 1; FIG. 3 is a line graph showing the fluid pressure generated by the fluid source of FIG. 1 in stages; FIGS. 4A to 4D are cross-sectional views of the lamination process of the curved surface lamination device of FIG. 1 ; and FIG. 5 is a cross-sectional view of a curved surface bonding apparatus according to another embodiment of the present invention.

50 Soft diaphragm 60 The surface is pasted 100 Surface Fitting Device 110 Fitting head 112 Ontology 114 Elastic fit 114A The first fitting part 114B Second fitting part 120 Stages 130 The first drive unit 140 Fluid Source 150 Rails A1 Long axis A2 Short shaft C Chamber D1 First direction D2 Second direction T Pipeline

Claims (12)

A curved surface bonding device, suitable for bonding a soft film to a curved surface to be bonded, comprising: A fitting head includes a body and an elastic fitting piece, the elastic fitting piece is connected to the body, and the body and the elastic fitting piece together form a cavity, wherein the elastic fitting piece has a first a bonding portion and a second bonding portion, and the Young's modulus of the first bonding portion is smaller than the Young's modulus of the second bonding portion; a stage, disposed at a position facing the elastic fitting, suitable for disposing the curved surface to be pasted, and the soft film is suitable for being disposed between the curved surface to be pasted and the elastic fitting ; a first driving unit, connected to the bonding head, for driving the bonding head toward or away from the carrier toward the carrier; and a fluid source connected to the chamber for generating a first fluid pressure and a second fluid pressure into the chamber in stages, wherein the first fluid pressure is less than the second fluid pressure; Wherein, when the pressure of the fluid source is increased to the first fluid pressure, the first fitting portion is elastically deformed to push a first portion of the soft diaphragm to be fitted to the curved surface to be fitted; After the fluid source is raised to the second fluid pressure, the second bonding portion is elastically deformed, and the first driving unit drives the bonding head to approach the stage at the same time, and pushes a first portion of the soft diaphragm The two parts are attached to the curved surface to be attached until the soft film is fully attached to the curved surface to be attached. The curved surface bonding device according to claim 1, wherein the curved surface object to be bonded has a biaxial curved surface, and the elastic bonding member is a planar elastic bonding member. The curved surface laminating device according to claim 1, wherein the first laminating part is located at the center of the second laminating part, and the first laminating part corresponds to one of the most convex points or One of the most concave points. The curved surface bonding device according to claim 1, wherein the size, shape, relative positional relationship or proportional relationship of the first bonding portion and the second bonding portion are consistent with the appearance of the curved surface object to be bonded correspond. The curved surface laminating device according to claim 1, wherein the first driving unit is a pneumatic cylinder or a hydraulic cylinder, and the laminating head is arranged on a piston part of the pneumatic cylinder or the hydraulic cylinder to drive the lamination Move the head toward or away from the carrier. The curved surface bonding device according to claim 1, wherein the fluid source is an air pressure source or a hydraulic pressure source. The curved surface bonding device as claimed in claim 1, further comprising: a guide rail on which the first drive unit is movably disposed; and A second driving unit connected to the first driving unit for driving the first driving unit to move along the guide rail, wherein the bonding head moves along the guide rail with the second driving unit to move the elastic bonding member to the position facing the stage. The curved surface bonding device according to claim 7, wherein the second driving unit is a step motor or a servo motor. The curved surface laminating device according to claim 1, further comprising a reel device disposed between the laminating head and the stage for disposing and rolling the soft film. The curved surface laminating device according to claim 1 further comprises a conveyor belt, a plurality of the carriers are arranged, and the carriers are sequentially moved to the positions corresponding to the lamination heads. The curved surface bonding device according to claim 1, further comprising a heating unit for heating the chamber or the soft membrane. The curved surface laminating device according to claim 1, further comprising a cutting unit for cutting the soft film that is completely attached to the curved surface to be attached.

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