Film attaching apparatus and film attaching method

Abstract

The application discloses a film pasting device and a film pasting method. The film pasting device comprises a lifting platform, a film suction device and a film pressing device. The film suction device is connected with the lifting platform and is used for adsorbing a film material. The film pressing device comprises an air bag and a limiting mechanism. The limiting mechanism comprises a limiting assembly. The limiting assembly is formed with an accommodating groove for accommodating the air bag. The air bag is used for expanding to paste the film material on the surface of a workpiece. The accommodating groove cooperates with the film material to form an accommodating cavity. The inner wall of the accommodating groove is used for abutting against the air bag. Since the limiting assembly is formed with the accommodating groove for accommodating the air bag, the part of the continuously expanding air bag abutting against the groove wall of the accommodating groove and the rest part abutting against the film material, and the part of the film material is pasted on the surface of the workpiece, so that the expansion of the air bag is limited. If the air bag is continuously inflated, the pressure in the air bag is increased, so that the film pasting device can realize high-pressure film pasting.

Description

Technical Field

[0001] This invention relates to the field of film application technology for irregular curved workpieces, and more particularly to a film application device and a film application method. Background Technology

[0002] With the increasing demand for diversified product design, the workpieces that need to be coated are no longer traditional flat or only single-shaped curved surfaces, but workpieces with both concave and convex surfaces. For coating these irregularly shaped workpieces, if traditional airbags are used to coat the surface of the irregularly shaped workpieces, high-pressure coating cannot be achieved, because existing airbags will expand and explode during the pressurization process.

[0003] Therefore, it is necessary to provide a new film application device and method to solve or at least alleviate the above-mentioned technical defects. Summary of the Invention

[0004] The main objective of this invention is to provide a film-applying device and method, which aims to solve the technical problem of being unable to apply pressure to apply film to irregularly shaped curved workpieces.

[0005] To achieve the above objectives, the present invention provides a film-applying device for applying a film material to the surface of a workpiece, the film-applying device comprising:

[0006] Lifting platform;

[0007] A film suction device is connected to the lifting platform and is used to adsorb the film material.

[0008] A film pressing device includes an air bladder and a limiting mechanism. The limiting mechanism includes a limiting component, which forms a receiving groove for accommodating the air bladder. The air bladder is used to inflate to adhere the film material to the surface of the workpiece. The receiving groove cooperates with the film material to form a receiving cavity. The inner wall of the receiving groove is used to abut against the air bladder.

[0009] In one embodiment, the limiting component includes a plurality of blocking members, at least a portion of which form the receiving groove. Each blocking member is movably connected to the film suction device and has a blocking position. The inflation of the airbag can move the blocking member located at the blocking position away from the blocking position, thereby increasing the volume of the receiving groove.

[0010] In one embodiment, the plurality of blocking members are divided into a central member and a plurality of limiting members, the central member and at least a portion of the limiting members forming the receiving groove, and the plurality of limiting members being arranged around the central member so that the airbag can gradually extend outward from the central member.

[0011] In one embodiment, all of the plurality of limiting members are annular limiting members, and the plurality of annular limiting members are sequentially sleeved around the periphery of the central member from the inside to the outside along the radial direction of the central member.

[0012] In one embodiment, the limiting mechanism further includes a pressure head assembly for abutting against the blocking member to restrict the blocking member from leaving the blocking position, so that the pressure head assembly can adjust the direction of the airbag inflation extension through the blocking member.

[0013] In one embodiment, the pressure head assembly includes a pressure head drive and a pressure head body pulsatorically connected to the pressure head drive. The pressure head body is capable of abutting against the blocking member to restrict the blocking member from leaving the blocking position. The pressure head drive is connected to the lifting platform and is used to drive the pressure head body to abut or separate from the blocking member, so that the pressure head drive can adjust the volume of the receiving groove through the pressure head body and the blocking member.

[0014] In one embodiment, a gap is formed between the side of each of the blocking members facing the airbag and the surface of the workpiece.

[0015] In one embodiment, the film application device further includes a limiting member connected to the film suction device. Each of the plurality of blocking members has a limiting hole for the limiting member to pass through, and each limiting hole extends along a first direction so that the limiting member can restrict the movement of each of the blocking members in the first direction.

[0016] In one embodiment, the bottom surface shape of the limiting component is adapted to the surface shape of the workpiece so that the bottom surface of the limiting mechanism can fit against the surface of the workpiece.

[0017] In one embodiment, the suction device has a through hole for accommodating the airbag and the restraining mechanism, the through hole being oriented toward the membrane material.

[0018] Furthermore, the present invention also provides a method for applying a film, the steps of which include:

[0019] Control the adsorption of membrane material by the membrane suction device;

[0020] The control lift platform drives the film suction device to descend to a preset position;

[0021] The airbag is inflated within the containment cavity formed by the limiting mechanism and the membrane material, and the membrane material is adhered to the workpiece through the airbag until the workpiece is fully coated.

[0022] In one embodiment, the limiting mechanism includes a limiting component, which includes a plurality of blocking members. At least a portion of the blocking members forms a receiving groove for accommodating the airbag. The receiving groove cooperates with the membrane material to form a receiving cavity. Each blocking member is movably connected to the suction device, and each blocking member has a blocking position. The inflation of the airbag can cause the blocking member located at the blocking position to move away from the blocking position, thereby increasing the volume of the receiving groove. The step of controlling the inflation of the airbag within the receiving cavity formed by the limiting mechanism and the membrane material includes:

[0023] The control airbag inflates within the receiving cavity formed by the limiting mechanism and the membrane material, and the inflated airbag simultaneously drives the blocking member located at the blocking position away from the blocking position.

[0024] In one embodiment, the limiting mechanism further includes a pressure head assembly for abutting against the blocking member to restrict the blocking member from leaving the blocking position, wherein the step of the simultaneously inflated airbag driving the blocking member located at the blocking position away from the blocking position includes:

[0025] Simultaneously, the pressure head assembly is controlled to continuously release the restrictor surrounding the opening edge of the receiving cavity, while the inflated airbag drives the blocking member that has released its contact with the pressure head assembly to move away from the blocking position.

[0026] In one embodiment, the plurality of blocking members are divided into a central member and a plurality of limiting members, all of which are annular limiting members. The plurality of annular limiting members are sequentially sleeved around the central member from the inside to the outside along the radial direction of the central member. The pressure head assembly includes a pressure head drive member and a pressure head body pulsatorically connected to the pressure head drive member. The pressure head body is used to abut against the limiting members to restrict the limiting members from moving out of the blocking position. The pressure head drive member is connected to the lifting platform and is used to drive the pressure head body to move. The step of simultaneously controlling the pressure head assembly to continuously release the limiting members annularly disposed at the opening edge of the receiving cavity includes:

[0027] Simultaneously, the pressure head drive unit is controlled to drive the pressure head body to move from the limiting member located near the center member in the radial direction away from the center member, so that the pressure head body abuts against the limiting member in sequence.

[0028] In the above-mentioned technical solution of the present invention, the workpiece is placed at a designated position, the film suction device is controlled to pick up the film material, and then the lifting platform is controlled to descend so that the lifting platform drives the film material to descend to a preset position through the film suction device. Then the airbag is inflated to expand it. Since the airbag and the film material form a receiving cavity, the airbag is located in the receiving cavity, and the side of the film material away from the receiving cavity is the workpiece. The inflated airbag will drive the film material to adhere to the surface of the workpiece. Since the limiting component forms a receiving groove to receive the airbag, the plane of the continuously expanding airbag will eventually abut against the groove wall, and the remaining plane will abut against the film material. This part of the film material is also adhered to the surface of the workpiece, so that the expansion of the airbag is restricted and cannot continue to expand outward. Continuously inflating the airbag will increase the pressure inside the airbag, so that the film application equipment can achieve high-pressure film application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the film suction device of the film application equipment according to an embodiment of the present invention when the film is not adsorbed;

[0031] Figure 2 This is a schematic diagram of the structure of the film-adsorption device of a film-applying equipment according to an embodiment of the present invention after adsorbing the film material;

[0032] Figure 3 This is a schematic diagram of the structure of a film-applying device according to an embodiment of the present invention, showing the film suction device descending to a preset position;

[0033] Figure 4 This is a cross-sectional view of the film suction device of an embodiment of the present invention at a preset position.

[0034] Figure 5 for Figure 4 A magnified view of a portion at point A;

[0035] Figure 6 This is a schematic diagram of the structure of a film-applying device according to an embodiment of the present invention when the film material is applied to the workpiece;

[0036] Figure 7 This is a cross-sectional view of a film-applying device according to an embodiment of the present invention, showing the film material being applied to a workpiece.

[0037] Figure 8 This is a schematic diagram of the structure of a film-applying device after film application to a workpiece according to an embodiment of the present invention;

[0038] Figure 9 This is a flowchart illustrating the first embodiment of the film application method of the present invention;

[0039] Figure 10 This is a schematic flowchart of the second embodiment of the film application method of the present invention;

[0040] Figure 11 This is a flowchart illustrating the third embodiment of the film application method of the present invention;

[0041] Figure 12 This is a flowchart illustrating the fourth embodiment of the film application method of the present invention.

[0042] Explanation of icon numbers:

[0043]

[0044]

[0045] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications (such as up and down) in the embodiments of this invention are only used to interpret a specific posture (as shown in the attached diagram). Figure 1 The relative positions and movements of the components shown below are considered. If the specific posture changes, the directional indication will also change accordingly.

[0048] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" can explicitly or implicitly include at least one of that feature.

[0049] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0050] This invention provides a film-applying device 1, which is used to apply a film material 3 to the surface of a workpiece 2, as shown in the figure. Figures 1 to 8 As shown, in one embodiment, the film application device 1 includes a lifting platform 11, a film suction device 12, and a film pressing device 13. The film suction device 12 is connected to the lifting platform 11 and is used to adsorb the film material 3. The film pressing device 13 includes an airbag 131 and a limiting mechanism 132. The limiting mechanism 132 includes a limiting component 1321. The limiting component 1321 forms a receiving groove 13214 for receiving the airbag 131. The airbag 131 is used to expand to adhere the film material 3 to the surface of the workpiece 2. The receiving groove 13214 cooperates with the film material 3 to form a receiving cavity 13215. The inner wall of the receiving groove 13214 is used to abut against the airbag 131.

[0051] In this process, the workpiece 2 is placed at a designated position, the film suction device 12 is controlled to pick up the film material 3, and then the lifting platform 11 is controlled to descend, so that the lifting platform 11, through the film suction device 12, carries the film material 3 down to a preset position, wherein the film material 3 at the preset position is separated from the surface of the workpiece 2 by a small distance; then the airbag 131 is inflated, so that it expands. Since the airbag 131 and the film material 3 form a receiving cavity 13215, the airbag 131 is located in the receiving cavity 13215, and the side of the film material 3 away from the receiving cavity 13215 is the workpiece 2. The inflated airbag 131... The device 1 will cause the film material 3 to adhere to the surface of the workpiece 2. Since the limiting component 1321 has a receiving groove 13214 to accommodate the airbag 131, the continuously expanding airbag 131 will eventually have part of its plane abut against the groove wall of the receiving groove 13214, while the remaining part of its plane abuts against the film material 3. This part of the film material 3 is then adhered to the surface of the workpiece 2, thus restricting the expansion of the airbag 131 and preventing it from expanding outwards. Continuously inflating the airbag 131 will increase the pressure inside the airbag 131, enabling the film application device 1 to achieve high-pressure film application. It should be noted that the size of the receiving groove 13214 can be fixed or can change with the expansion of the airbag 131. If the size of the receiving groove 13214 is fixed, the receiving groove 13214 can be directly formed on the limiting component 1321, thereby forming a receiving groove 13214 of a fixed size. It should also be noted that the suction device 12 can be a workpiece 2 with a vacuum suction cup installed, or a workpiece 2 with a vacuum hole, one end of which is used to connect to a vacuum pump.

[0052] Furthermore, in one embodiment, the limiting component 1321 includes a plurality of blocking members 13211, at least some of the blocking members 13211 forming a receiving groove 13214, each blocking member 13211 being movably connected to the film suction device 12, and each blocking member 13211 having a blocking position. The inflation of the airbag 131 can drive the blocking member 13211 located at the blocking position to move away from the blocking position, thereby increasing the volume of the receiving groove 13214. Currently, the existing airbag 131 is used for film application. It relies on the airbag 131 to inflate and expand in an open space to adhere the film material 3 to the surface of the workpiece 2. However, for irregularly shaped workpieces 2 with concave and convex surfaces, during the expansion process of the airbag 131, the film material 3 generally first comes into contact with the convex surface, then with the flat surface, and finally with the concave surface. After the film material 3 comes into contact with the convex surface, the airbag 131 continues to expand, which will cause the pressure of the part of the film material 3 that comes into contact with the convex surface to continue to increase. When the airbag 131 drives the film material 3 to come into contact with the concave surface, the convex surface has already been subjected to a large pressure. The pressure distribution of the concave surface and the convex surface has a large difference, which may lead to adhesive residue and trapped air in the film material. In this embodiment, since the limiting member 13213 can move up and down relative to the film suction device 12, as the airbag 131 expands, the airbag 131 will adhere the film material 3 below the existing-sized receiving groove 13214 to the surface of the workpiece 2. As the airbag 131 is continuously inflated, it will expand outwards. The continuously expanding airbag 131 will contact the blocking member 13211 located at the blocking position and lift the blocking member 13211, thereby allowing the volume of the receiving groove 13214 to continuously increase as the airbag 131 expands. The lifted limiting member 13213 restricts the airbag 131 by its own weight, thus allowing the film to adhere. Equipment 1 can achieve high-pressure film lamination. Because the weight of the limiting member 13213 acts on the film material 3 bonded to the workpiece 2 through the airbag 131, the pressure distribution of the film material 3 on the workpiece 2 is relatively uniform. Even if the film material 3 first bonds to the convex surface of the workpiece 2 and then to the concave surface, when the airbag 131 inflates to bond the film material 3 to the concave surface of the workpiece 2, the pressure of the limiting member 13213, lifted by the airbag 131, acts on the workpiece 2 simultaneously through the airbag 131 and the film material 3. This results in a more uniform pressure distribution of the film material 3 on the workpiece 2 compared to existing technologies, effectively reducing the occurrence of adhesive residue and trapped air. It should be noted that the blocking member 13211 and the film suction device 12 can be either slidably connected or connected by a hinge. One end of the hinge intersects with the film suction device 12, and the other end is hinged to the blocking member 13211.

[0053] Furthermore, in one embodiment, the plurality of blocking members 13211 are divided into a central member 13212 and a plurality of limiting members 13213. The central member 13212 has a groove 13216 for accommodating the airbag 131. The groove 13216 communicates with the receiving groove 13214. The central member 13212 and at least some of the limiting members 13213 form the receiving groove 13214. The plurality of limiting members 13213 are arranged around the central member 13212 so that the airbag 131 can gradually extend outward from the central member 13212 as the center. Inflating the airbag 131 causes it to expand within the groove 13216, initially adhering the film 3 at the bottom of the groove 13216 to the surface of the workpiece 2. As the airbag 131 continues to expand, it causes the central component 13212 to rise, moving it away from the obstruction position and expanding outwards. With the increase in the volume of the expansion-accommodating groove 13214 of the airbag 131, the area of ​​the film 3 adhered to the surface of the workpiece 2 gradually increases, extending outwards from the central component 13212 to ensure the film 3 is evenly adhered to the surface of the workpiece 2. It should be noted that the position of the central component 13212 generally coincides with or nearly coincides with the center of the area on the workpiece 2 to which the film is applied, allowing the outward-extending airbag 131 to complete the film application to the workpiece 2 more quickly.

[0054] In one embodiment, the plurality of limiting members 13213 are all annular limiting members 13213A, and the plurality of annular limiting members 13213A are sequentially sleeved on the periphery of the central member 13212 from the inside to the outside along the radial direction of the central member 13212. Multiple annular restrictors 13213A are sequentially fitted around the central member 13212 from the inside out, so that the shape of the part of the membrane material 3 that is in contact with the workpiece 2 can gradually extend outward in the shape of or close to the annular restrictor 13213A. With the expansion of the airbag 131 in all directions, the expanded airbag 131 can move each restrictor upward from the center of the central member 13212 away from the obstruction position. Since the membrane material 3 in contact with the surface of the workpiece 2 is subjected to the gravity of the lifted annular restrictor 13213A, the pressure distribution is relatively uniform. At the same time, the pressure distribution of the membrane material 3 under the same annular restrictor 13213A on the workpiece 2 is more uniform than that of the membrane material 3 under different annular restrictors 13213A, thereby further reducing the occurrence of membrane material adhesive marks and trapped air. It should be noted that the annular limiting member 13213A extends in the vertical direction, and the shape of the annular limiting member 13213A can be circular, square, or other polygonal, etc., and is not limited here. According to an embodiment of the present invention, the annular limiting member 13213A is a circular ring limiting member.

[0055] In another embodiment, the limiting mechanism 132 further includes a pressure head assembly 1322, which abuts against the blocking member 13211 to restrict the blocking member 13211 from leaving the blocking position, so that the pressure head assembly 1322 can adjust the direction of the airbag 131's expansion and extension through the blocking member 13211. By setting the pressure head assembly 1322, the blocking member 13211, which abuts against the pressure head assembly 1322, cannot leave the blocking position, which causes the airbag 131 to be unable to continue extending along the position of the blocking member 13211, thereby allowing the extension direction of the airbag 131 to be controlled to adapt to workpieces 2 of different shapes and sizes.

[0056] Furthermore, in one embodiment, the pressure head assembly 1322 includes a pressure head drive member 13221 and a pressure head body 13222 that is throttle-connected to the pressure head drive member 13221. The pressure head body 13222 can abut against the blocking member 13211 to restrict the blocking member 13211 from leaving the blocking position. The pressure head drive member 13221 is connected to the lifting platform 11 and is used to drive the pressure head body 13222 to abut against or separate from the blocking member 13211, so that the pressure head drive member 13221 can adjust the volume of the receiving groove 13214 through the pressure head body 13222 and the blocking member 13211. The pressure head drive 13221 drives the pressure head body 13222 to move, so that the blocking member 13211 that is not in contact with the pressure head body 13222 can be moved away from the blocking position by the inflated airbag 131. However, the blocking member 13211 that is in contact with the pressure head body 13222 cannot be moved away from the blocking position by the airbag 131, thereby limiting the extension of the airbag 131. That is, the pressure head drive 13221 drives the pressure head body 13222 to abut against different blocking members 13211, thereby limiting the size of the airbag 131 by adjusting the size of the receiving groove 13214, and thus controlling the area of ​​the film material 3 that is attached to the workpiece 2. It should be noted that before the airbag 131 is inflated, the pressure head body 13222 generally abuts against the top surface of the central member 13212 or the top surface of the annular limiting member 13213A located near the central member 13212. As the airbag 131 continues to inflate and expand, before the airbag 131 adheres the membrane material 3 below the existing receiving groove 13214 to the surface of the workpiece 2, the pressure head body 13222 restricts the airbag 131 through the annular limiting member 13213A, preventing the annular airbag 131 from not fully adhering to the membrane material 3 below the existing receiving groove 13214. Before the film is applied, it expands outwards, which causes uneven pressure on the surface of the workpiece 2 caused by the film material 3. In conjunction with the film application speed of the airbag 131, when the airbag 131 applies the film material 3 below the existing receiving groove 13214 to the surface of the workpiece 2, the pressure head drive 13221 is controlled to drive the pressure head body 13222 from the annular restrictor 13213A to another annular restrictor 13213A sleeved around the annular restrictor 13213A, so that the airbag 131 can gradually extend outwards and ensure that the pressure distribution of the film material 3 on the surface of the workpiece 2 is relatively uniform.

[0057] In another embodiment, a gap 13217 is formed between the side of each blocking member 13211 facing the airbag 131 and the surface of the workpiece 2. By forming a gap 13217 between the bottom of the blocking member 13211 and the side facing the airbag 131 and the surface of the workpiece 2, the inflated airbag 131 can extend into the gap 13217 first and then gradually inflate, thereby making it easier to lift the blocking member 13211.

[0058] Reference Figure 4 and Figure 7 As shown, in one embodiment, the film application device 1 further includes a limiting member 14, which is connected to the film suction device 12. Multiple blocking members 13211 are each provided with a limiting hole 13218 through which the limiting member 14 passes. Each limiting hole 13218 extends along a first direction, so that the limiting member 14 can restrict the movement of each blocking member 13211 in the first direction. By setting the limiting member 14 and the limiting hole 13218, each blocking member 13211 can move up and down relative to the limiting member 14, allowing the inflated airbag 131 to move the blocking member 13211 upwards away from the blocking position. Furthermore, the movement of the blocking member 13211 can be limited. Specifically, when the limiting member 14 abuts against the upper wall of the limiting hole 13218, it restricts the limiting member 14 from moving downwards relative to the film suction device 12, thereby disengaging from the film suction device 12. This also allows the lifting platform 11 to move upwards and downwards simultaneously with the film suction device 12. The lifting platform 11 moves together with the limiting components 13213. When the lifting platform 11 lowers the film suction device 12 to the preset position, before the airbag 131 is inflated, the position of the blocking component 13211 is the blocking position. When the inflated airbag 131 moves the blocking component 13211 relative to the limiting component 14, the limiting component 14 abuts against the lower wall of the limiting hole 13218, thereby limiting the further rise of the limiting component 13213. This allows the limiting component 13213 to restrict the extension of the airbag 131, which is beneficial for the film application equipment 1 to perform high-pressure film application on the workpiece 2. It should be noted that the limiting hole 13218 can be an oblong hole, a rectangular hole, or a through hole 121 of other shapes, and there are no restrictions here.

[0059] Furthermore, in one embodiment, the bottom surface shape of the limiting component 1321 is adapted to the surface shape of the workpiece 2, so that the bottom surface of the limiting mechanism 132 can fit against the surface of the workpiece 2. Where the surface of the workpiece 2 is concave, the limiting component 1321 is convex at the corresponding position; where the surface of the workpiece 2 is convex, the limiting component 1321 is concave at the corresponding position, so that the distance between each blocking member 13211 and the surface of the workpiece 2 is substantially the same, allowing the inflated airbag 131 to extend evenly in all directions.

[0060] In one embodiment, the film suction device 12 has a through hole 121 for accommodating the airbag 131 and the limiting mechanism 132, and the through hole 121 is oriented towards the film material 3. By providing a through hole 121 to accommodate the limiting mechanism 132, the space occupied by the film application device 1 is effectively reduced; on the other hand, if the inflated airbag 131 causes all the blocking members 13211 to move away from their blocking positions, the airbag 131 will continue to expand and abut against the inner wall of the through hole 121, thereby limiting the airbag 131 through the inner wall of the through hole 121, which is beneficial to the realization of high-pressure film application. It should be noted that the limiting member 14 is also provided in the through hole 121, and one end of the limiting member 14 is connected to the inner wall of the through hole 121.

[0061] In addition, the present invention also provides a method for applying a film, referring to... Figure 9 As shown, Figure 9 This is a flowchart illustrating the first embodiment of the film application method of the present invention. The steps of the film application method include:

[0062] S100 controls the adsorption of membrane material by the membrane suction device;

[0063] By controlling the suction device to adsorb the membrane material, the position of the membrane material can be changed by adjusting the position of the suction device.

[0064] S200, control the lifting platform to drive the film suction device to descend to a preset position;

[0065] The control lifting platform lowers the film suction device, which in turn lowers the film material adsorbed by the film suction device. This ensures that after the film suction device descends to the preset position, there is a small gap between the film material and the surface of the workpiece. This prevents the film material from contacting the workpiece surface before the airbag expands, thus avoiding affecting the subsequent film application quality.

[0066] S300, the airbag is controlled to inflate within the cavity formed by the limiting mechanism and the membrane material, and the membrane material is adhered to the workpiece through the airbag until the workpiece is fully coated.

[0067] Inflating the airbag causes it to expand, which in turn moves the film material downwards to adhere to the workpiece surface. Because the expansion size of the airbag is limited by the limiting mechanism and the film material adhering to the workpiece, the airbag will not expand further after it has expanded to a certain size. This avoids the airbag bursting due to exceeding its expansion limit. Furthermore, as the airbag continues to expand, the internal pressure increases, thus enabling the film-applying equipment to apply high-pressure film to the workpiece.

[0068] The process involves placing the workpiece at a designated location, controlling the film suction device to pick up the film material, and then controlling the lifting platform to descend so that the lifting platform, through the film suction device, lowers the film material to a preset position. At the preset position, the film material is spaced slightly apart from the workpiece surface. Next, the airbag is inflated, causing it to expand. Since the airbag and film material form a receiving cavity, with the airbag located inside the cavity and the workpiece on the side of the film material furthest from the cavity, the expanding airbag causes the film material to adhere to the workpiece surface. Because the limiting mechanism forms a receiving groove to accommodate the airbag, part of the continuously expanding airbag eventually abuts against the groove wall, while the remaining part abuts against the film material. This portion of the film material adheres to the workpiece surface, thus restricting the expansion of the airbag and preventing it from expanding further. Continuous inflation of the airbag increases the pressure inside, enabling the laminating equipment to achieve high-pressure lamination.

[0069] In one embodiment, the limiting mechanism includes a limiting component, which includes a plurality of blocking members. At least a portion of the blocking members forms a receiving groove for accommodating the airbag. The receiving groove cooperates with the membrane material to form a receiving cavity. Each blocking member is movably connected to the suction device, and each blocking member has a blocking position. The inflation of the airbag can move the blocking member located at the blocking position away from the blocking position, thereby increasing the volume of the receiving groove. (Refer to...) Figure 10 As shown, Figure 10 This is a schematic flowchart of a second embodiment of the film application method of the present invention. The step of controlling the airbag to inflate within the receiving cavity formed by the restraining mechanism and the film material includes:

[0070] S310, the airbag is controlled to inflate within the receiving cavity formed by the limiting mechanism and the membrane material, and the inflated airbag simultaneously drives the blocking member located at the blocking position away from the blocking position.

[0071] Because the limiting component can move up and down relative to the film suction device, as the airbag expands, it adheres the film material below the existing-sized receiving groove to the surface of the workpiece. As the airbag is continuously inflated, it expands outwards. The continuously expanding airbag contacts the blocking component located at the blocking position and lifts the blocking component, thereby allowing the volume of the receiving groove to continuously increase as the airbag expands. The lifted limiting component restricts the airbag with its own weight, enabling the film application equipment to achieve high-pressure film application. Furthermore, because the weight of the limiting component acts on the film material adhered to the workpiece through the airbag, the pressure distribution of the film material on the workpiece is relatively uniform. Even if the film material first adheres to the convex surface of the workpiece and then to the concave surface, when the airbag expands to allow the film material to adhere to the concave surface of the workpiece, the pressure of the limiting component lifted by the airbag acts on the workpiece simultaneously through the airbag and the film material. This makes the pressure distribution of the film material on the workpiece more uniform than that of existing technologies, thereby effectively reducing the occurrence of film material adhesive marks and trapped air.

[0072] In one embodiment, the limiting mechanism further includes a pressure head assembly for abutting against the blocking member to limit the blocking member from leaving the blocking position, see reference. Figure 11 As shown, Figure 11 This is a schematic flowchart of the third embodiment of the film application method of the present invention. The step of the airbag, which inflates simultaneously, driving the blocking member located at the blocking position away from the blocking position includes:

[0073] S311, simultaneously control the pressure head assembly to continuously release the restrictor surrounding the opening edge of the receiving cavity, while the inflated airbag drives the blocking member that has released from contact with the pressure head assembly to leave the blocking position.

[0074] The blocking component that abuts against the pressure head assembly cannot leave its blocking position, preventing the airbag from extending further along the direction of the blocking component. This allows for adjustment of the airbag's extension direction to accommodate workpieces of different shapes and sizes. By continuously releasing the constraints on the opening edge of the receiving cavity, the airbag can lift the released constraints, and the inflated airbag, without the obstruction of these constraints, can extend outwards, adhering more film material to the workpiece surface. It should be noted that if there is more than one constraint on the opening edge of the receiving cavity, the operation of continuously releasing the constraints on the opening edge of the receiving cavity can be done by first releasing the constraints on the existing receiving cavity edges one by one and then repeating the process; or it can be done by releasing all the constraints on the existing receiving cavity edges at once and then repeating the process.

[0075] In one embodiment, the plurality of blocking members are divided into a central member and a plurality of limiting members, all of which are annular limiting members. The plurality of annular limiting members are sequentially sleeved around the central member from the inside to the outside along the radial direction of the central member. The pressure head assembly includes a pressure head drive member and a pressure head body pulsatorically connected to the pressure head drive member. The pressure head body is used to abut against the limiting members to restrict the limiting members from moving out of the blocking position. The pressure head drive member is connected to the lifting platform and is used to drive the pressure head body to move. (Refer to...) Figure 12 As shown, Figure 12 This is a schematic flowchart of the fourth embodiment of the film application method of the present invention. The step of simultaneously controlling the pressure head assembly to continuously release the restrictor surrounding the opening edge of the receiving cavity includes:

[0076] S3111, simultaneously control the pressure head drive to drive the pressure head body to move from the limiting member located near the center member in the radial direction away from the center member, so that the pressure head body abuts against the limiting member in sequence.

[0077] The pressure head drive unit drives the pressure head body to move so that the blocking parts that are not in contact with the pressure head body can be moved away from the blocking position by the inflated airbag. However, the airbag cannot move the blocking parts that are in contact with the pressure head body away from the blocking position, thus limiting the extension of the airbag. In other words, the pressure head drive unit drives the pressure head body to abut against different blocking parts, thereby adjusting the size of the receiving groove to limit the size of the airbag, and thus controlling the area of ​​the film material that is attached to the workpiece. It should be noted that before the airbag is inflated, the pressure head body is generally in contact with the top surface of the central component or the top surface of the annular limiting component near the central component. As the airbag continues to inflate and expand, before the airbag applies the film material below the existing receiving groove to the workpiece surface, the pressure head body restricts the airbag through the annular limiting component it is in contact with. This prevents the annular airbag from expanding outwards before completing the application of the film material below the existing receiving groove, which would otherwise cause uneven pressure on the workpiece surface. In conjunction with the film application speed of the airbag, once the airbag has applied the film material below the existing receiving groove to the workpiece surface, the pressure head drive component is controlled to move the pressure head body from the annular limiting component to another annular limiting component surrounding the annular limiting component. This allows the airbag to gradually extend outwards and ensures a relatively uniform pressure distribution of the film material on the workpiece surface.

[0078] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A film-applying device, wherein the film-applying device is used to apply a film material to the surface of a workpiece, characterized in that, The film application device includes: Lifting platform; A film suction device is connected to the lifting platform and is used to adsorb the film material. A film-pressing device includes an air bladder and a limiting mechanism. The limiting mechanism includes a limiting component, which forms a receiving groove for accommodating the air bladder. The air bladder is used to inflate and adhere the film material to the surface of the workpiece. The receiving groove cooperates with the film material to form a receiving cavity, and the inner wall of the receiving groove is used to abut against the air bladder. The limiting component includes a plurality of blocking members, at least a portion of which forms the receiving groove. Each blocking member is movably connected to the film-suction device and has a blocking position. The inflation of the air bladder can move the blocking member located at the blocking position away from the blocking position, thereby increasing the volume of the receiving groove.

2. The film application device according to claim 1, characterized in that, The plurality of blocking members are divided into a central member and a plurality of limiting members. The central member and at least a portion of the limiting members form the receiving groove. The plurality of limiting members are arranged around the central member so that the airbag can gradually extend outward from the central member.

3. The film application device according to claim 2, characterized in that, All of the aforementioned limiting members are annular limiting members, and the aforementioned annular limiting members are sequentially sleeved around the periphery of the central member from the inside to the outside along the radial direction of the central member.

4. The film application device according to claim 1, characterized in that, The limiting mechanism further includes a pressure head assembly for abutting against the blocking member to restrict the blocking member from leaving the blocking position, so that the pressure head assembly can adjust the direction of the airbag inflation extension through the blocking member.

5. The film-applying device according to claim 4, characterized in that, The pressure head assembly includes a pressure head drive and a pressure head body pulsatorically connected to the pressure head drive. The pressure head body can abut against the blocking member to restrict the blocking member from leaving the blocking position. The pressure head drive is connected to the lifting platform. The pressure head drive is used to drive the pressure head body to abut against or separate from the blocking member, so that the pressure head drive can adjust the volume of the receiving groove through the pressure head body and the blocking member.

6. The film application device according to claim 1, characterized in that, A gap is formed between the side of each of the blocking members facing the airbag and the surface of the workpiece.

7. The film-applying device according to claim 1, characterized in that, The film application device also includes a limiting member connected to the film suction device. Each of the plurality of blocking members has a limiting hole for the limiting member to pass through. Each limiting hole extends along a first direction so that the limiting member can restrict the movement of each blocking member in the first direction.

8. The film-applying device according to any one of claims 1 to 7, characterized in that, The bottom shape of the limiting component is adapted to the surface shape of the workpiece.

9. The film-applying device according to any one of claims 1 to 7, characterized in that, The film suction device has a through hole for accommodating the airbag and the restraining mechanism, and the through hole is oriented toward the film material.

10. A method for applying a film, characterized in that, The limiting mechanism includes a limiting component, which includes a plurality of blocking members. At least a portion of the blocking members form a receiving groove for accommodating an airbag. The receiving groove cooperates with the membrane material to form a receiving cavity. Each blocking member is movably connected to the film suction device, and each blocking member has a blocking position. The inflation of the airbag can drive the blocking member located at the blocking position away from the blocking position, thereby increasing the volume of the receiving groove. The steps of the film application method include: The membrane adsorption device is controlled to adsorb the membrane material; The control lift platform drives the film suction device to descend to a preset position; The airbag is controlled to inflate within the cavity formed by the limiting mechanism and the membrane material. Simultaneously, the inflated airbag drives the blocking member located at the blocking position away from the blocking position, and the membrane material is adhered to the workpiece through the airbag until the workpiece is fully coated.

11. The film application method according to claim 10, characterized in that, The limiting mechanism further includes a pressure head assembly for abutting against the blocking member to restrict the blocking member from leaving the blocking position, wherein the step of the simultaneously inflated airbag driving the blocking member located at the blocking position away from the blocking position includes: Simultaneously, the pressure head assembly is controlled to continuously release the restrictor surrounding the opening edge of the receiving cavity, while the inflated airbag drives the blocking member that has released its contact with the pressure head assembly to move away from the blocking position.

12. The film application method according to claim 11, characterized in that, The plurality of blocking members are divided into a central member and a plurality of limiting members, all of which are annular limiting members. These annular limiting members are sequentially sleeved around the central member from the inside out along the radial direction of the central member. The pressure head assembly includes a pressure head drive and a pressure head body pulsatorically connected to the pressure head drive. The pressure head body abuts against the limiting members to prevent them from moving out of the blocking position. The pressure head drive is connected to the lifting platform and drives the pressure head body to move. The step of simultaneously controlling the pressure head assembly to continuously release the limiting members annularly positioned at the opening edge of the receiving cavity includes: Simultaneously, the pressure head drive unit controls the pressure head body to move from the limiting member located near the center member in the radial direction away from the center member, so that the pressure head body sequentially abuts against the limiting member.

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