Vacuum-powered film-applying mechanism
A vacuum-powered film-applying mechanism for applying a flexible film to a workpiece includes a bracket, a suction member, and a rotating joint. The suction member is rotatably mounted on the bracket, and defines a peripheral surface and a plurality of suction chambers therein, and by virtue of a vacuum created in the interior of the suction member, a length of flexible film is attracted and adhered. The rotating joint on the bracket communicates with the plurality of the suction chamber, through the rotating joint, air is supplied and exhausted from the plurality of suction chambers progressively, on a one by one basis, to pick up and roll the flexible film onto itself, and by supplying air to the plurality of suction chambers one by one, unrolls and releases the flexible film onto the workpiece with a low incidence of trapping air bubbles.
1. A vacuum-powered film-applying mechanism for adhering a flexible film to a workpiece, comprising:
a bracket comprising a rotating shaft;
a suction member rotatably sleeved on the rotating shaft, and defining a peripheral suction surface along a periphery thereof and a plurality of suction chambers therein, the peripheral suction surface defining a plurality of suction holes respectively communicating with the plurality of suction chambers; and
a rotating joint rotatably sleeved on the rotating shaft and defining a plurality of air conduits respectively communicating with the plurality of the suction chambers, wherein when the suction member is rotated to suck the flexible film, the rotating joint is capable of exhausting air from the plurality of suction chambers one by one to enable the suction member to be sticking to and rolling the flexible film thereon, when the suction member is rotated to adhere the flexible film to the workpiece, the rotating joint is capable of supplying air to the plurality of suction chambers one by one to enable the suction member to unroll and release the flexible film.
2. The film-applying mechanism of claim 1 , wherein the plurality of suction holes are divided into a plurality of groups respectively communicating with the plurality of suction chamber.
3. The film-applying mechanism of claim 1 , wherein the suction member is in a cylindrical shape, and the plurality of suction holes are uniformly distributed along the peripheral suction surface of the suction member.
4. The film-applying mechanism of claim 1 , wherein the suction member comprise a main body configured in an annular shape, and a shielding cover mounted on an end of the main body, the plurality of suction chambers are defined on an end of the main body and uniformly arranged adjacent to a periphery of the main body in a looped configuration, the shielding cover seals the plurality of suction chambers.
5. The film-applying mechanism of claim 4 , wherein the shielding cover comprises a base body configured in an annular shape and a plurality of sealing portions formed on the base body, the plurality of sealing portions are uniformly arranged adjacent to a periphery of the base body in a looped configuration for respectively seal the plurality of suction chambers.
6. The film-applying mechanism of claim 5 , wherein each sealing portion defines a though hole cutting through the base body, the through hole communicates with the corresponding suction chamber for supplying air to and exhausting air from the suction chamber, the rotating joint defines a first air conduit communicating with the plurality of air conduits, the plurality of air conduits communicate with the plurality of though holes of the shielding cover, respectively.
7. The film-applying mechanism of claim 6 , wherein a diameter of the rotating joint is equal to that of the shielding cover, and the plurality of air conduits respectively connects with the plurality of though holes directly.
8. The film-applying mechanism of claim 5 , wherein the main body comprises a plurality of separating portions, each separating portion is formed between two adjacent suction chambers to separate the two adjacent suction chambers, each separating portion defines a fixing hole therein along an axial direction of the main body, the base body defines a plurality of mounting holes thereon, and each mounting hole is located between two adjacent sealing portions, the base body is fixed to the main body via the plurality of mounting holes and the plurality of fixing holes.
9. The film-applying mechanism of claim 4 , wherein the bracket further comprises a mounting plate, and a pair of supporting plates, the pair of supporting plates extends from opposite ends of the mounting plate, the rotating shaft is rotatably mounted on the pair of supporting plates, opposite ends of the rotating shaft are connected to the pair of supporting plates, respectively, the main body and the rotating joint are rotatably sleeved on the rotating shaft.
10. The film-applying mechanism of claim 9 , further comprising a mounting subassembly, wherein the main body defines a pair of receiving holes at opposite ends thereof and a sleeving hole interconnecting the pair of receiving holes, the sleeving hole is located between the pair of receiving holes and communicates with the pair of receiving holes at opposite ends of the receiving holes, the main body is rotatably sleeved on the rotating shaft via the sleeving hole, the mounting subassembly comprises a pair of bearings and a fixing member, the pair of bearings is respectively received in the pair of receiving holes and rotatably interconnects the rotating shaft and the main body, the fixing member is fittingly sleeved on the rotating shaft and resists one bearing toward the sleeving hole to hold the suction member.
11. The film-applying mechanism of claim 10 , further comprising an adjusting assembly, wherein the adjusting assembly comprises a first friction member, a second friction member, and a pair of resisting members, the first friction member and the second friction member are located between the main body and one supporting plate, the second friction member is partially received in the first friction member and resists the main body toward the fixing member, the pair of resisting members extends through the first friction member, and resist against the second friction member toward the main body.
12. The film-applying mechanism of claim 11 , wherein the resisting member comprises a head portion and a resisting portion coaxial to the head portion, the head portion exposes out of the supporting plate, and the resisting portion resists the second friction member toward the main body.
13. A vacuum-powered film-applying mechanism for adhering a flexible film to a workpiece, comprising:
a bracket comprising a mounting plate, a pair of supporting plates, and a rotating shaft, wherein the pair of supporting plates extends from opposite ends of the mounting plate, the rotating shaft is rotatably mounted on the pair of supporting plates, opposite ends of the rotating shaft are connected to the pair of supporting plates, respectively;
a suction member comprising a main body configured in an annular shape and a shielding cover mounted on an end of the main body, the main body rotatably sleeved on the rotating shaft, and defining a peripheral suction surface along a periphery thereof and a plurality of suction chambers therein for generating a negative pressure or a positive pressure on the peripheral suction surface, the suction chambers uniformly arranged adjacent to a periphery of the main body in a looped configuration, the shielding cover sealing the suction chambers; and
a rotating joint rotatably sleeved on the rotating shaft and defining a plurality of air conduits therein respectively communicating with the plurality of suction chambers, wherein when the suction member is rotated to suck the flexible film, the rotating joint is capable of exhausting air from the plurality of suction chambers one by one to enable the suction member to adhere and roll the flexible film thereon, when the suction member is rotated to adhere the flexible film to the workpiece, the rotating joint is capable of supplying air to the plurality of suction chambers one by one to enable the suction member to unroll and release the flexible film.
14. The film-applying mechanism of claim 13 , wherein the peripheral suction surface defines a plurality of suction holes respectively communicating with the plurality of suction chambers, the plurality of suction holes are divided into several groups respectively communicate with the plurality of suction chamber.
15. The film-applying mechanism of claim 13 , wherein the peripheral suction surface defines a plurality of suction holes respectively communicating with the plurality of suction chambers, the suction member is in a cylindrical shape, and the plurality of suction holes are uniformly distributed along the peripheral suction surface of the suction member.
16. The film-applying mechanism of claim 13 , wherein the shielding cover comprises a base body configured in an annular shape and a plurality of sealing portions formed on the base body, the plurality of sealing portions are uniformly arranged adjacent to a periphery of the base body in a looped configuration for respectively seal the plurality of suction chambers.
17. The film-applying mechanism of claim 16 , wherein each sealing portion defines a though hole cutting through the base body, the through hole communicates with the corresponding suction chamber for supplying air to and exhausting air from the suction chamber, the rotating joint further defines a first air conduit communicating with the plurality of air conduits, the plurality of air conduits communicate with the plurality of suction chambers via the plurality of though holes of the shielding cover.
18. The film-applying mechanism of claim 17 , wherein a diameter of the rotating joint is equal to that of the shielding cover, and the plurality of air conduits respectively connects with the plurality of though holes directly.
19. The film-applying mechanism of claim 16 , wherein the main body comprises a plurality of separating portions, each separating portion is formed between two adjacent suction chambers to separate the two adjacent suction chambers, each separating portion defines a fixing hole therein along an axial direction of the main body, the base body defines a plurality of mounting holes thereon, and each mounting hole is located between two adjacent sealing portions, the base body is fixed to the main body via the plurality of mounting holes and the plurality of fixing holes.