A film coating mechanism for PVC pipe fittings packaging

Abstract

This utility model belongs to the field of packaging equipment technology, and in particular relates to a film-coating mechanism for PVC pipe packaging. It includes a frame, a winding and film-coating device, a sealing component, a drive component, and a clamping mechanism. The winding and film-coating device spirally winds the pipe through a turntable assembly, while the clamping mechanism clamps and cuts the film. The sealing component includes an arc-shaped plate and an arc-shaped cover. The arc-shaped cover contains a heat-spreading plate and air vents, and the arc-shaped plate has a pressure roller. Hot air is transferred from a fixed heat source to a rotating heating chamber via a slip ring assembly. The drive component drives the sealing component to move, vertically lift, and rotate. During operation, after winding, the clamping mechanism cuts the film, and the drive component moves the sealing component to the sealing position. Hot air is transferred to the arc-shaped cover via the slip ring assembly to treat the end of the film with hot air, causing the film to shrink, adhere, and be firmly fixed. This device solves the problem of film end loosening in traditional packaging methods, improving packaging quality and stability.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, and in particular relates to a film coating mechanism for packaging PVC pipe fittings. Background Technology

[0002] In the production and transportation of PVC pipe fittings, the wrapping of protective film is a crucial process for ensuring product quality. Building water supply and drainage pipes, municipal pipelines, and industrial pipe fittings require protective film wrapping during storage, transportation, and installation to prevent surface scratches, contamination, and UV damage. The quality of the wrapping directly affects the appearance and market competitiveness of the pipe fittings; therefore, efficient and stable film wrapping technology is of great importance to PVC pipe fitting manufacturers.

[0003] Existing membrane winding devices mainly use rotary or robotic arm methods to spirally wind pipes. After winding, the membrane ends are processed by simple mechanical cutting. The membrane and the pipe surface, as well as the membrane layers, are mainly bonded by static friction, which has limited bonding strength. During long-term storage and transportation of pipes, especially under the influence of external environmental factors such as vibration, temperature changes, and humidity changes, the membrane is prone to loosening and displacement, resulting in loose packaging and failing to provide stable and reliable protection.

[0004] Secondly, the ends of the mechanically cut film lack effective fixing measures and rely solely on the elasticity and friction of the film itself to maintain a fixed state. The ends of the film are on the outermost layer of the wrapping layer and are not constrained by subsequent film layers. Under external force, they are prone to rebound and loosening, which in turn affects the stability of the entire packaging layer and can lead to complete packaging failure in severe cases. Utility Model Content

[0005] In view of the technical problems existing in the background art, the present invention provides a film coating mechanism for packaging PVC pipe fittings.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A film-coating mechanism for packaging PVC pipe fittings includes a frame and pipe fittings. A wrapping film-coating device and a packaging component are fixedly connected to the top of the frame. A drive component for driving the packaging component is also fixedly connected to the top of the frame. A film clamping mechanism for cutting the wrapping film is also fixedly connected to the outer end of the wrapping film-coating device.

[0008] The encapsulation assembly includes two arc-shaped plates with a fixed spacing. An arc-shaped cover is fixedly connected to the outer end of the arc-shaped plates. A heat spreader is fixedly connected to the inner wall of the arc-shaped cover. Several air holes are opened on the heat spreader. Two pressure rollers are rotatably connected to the arc-shaped plates. The pressure rollers abut against the wrapping film. A drive frame is fixedly connected to the outer end of the arc-shaped plates. The drive frame is fixedly connected to a drive assembly. A support half-ring is fixedly connected to the outer end of the drive frame. The outer end of the support half-ring is rotatably mounted on a support ring. A slip ring for transmitting hot air is rotatably connected to the outer end of the support ring.

[0009] Optionally, the slip ring includes a sealing ring fixedly connected to the outer wall of the support ring, an outer ring rotatably connected to the outer wall of the support ring, the inner wall of the outer ring abutting against the sealing ring, an air supply pipe fixedly connected to the outer wall of the outer ring, and the air supply pipe passing through the arc plate and communicating with the arc cover. A conveying air duct is opened inside the support ring, and the conveying air duct is communicating with the outer ring.

[0010] Optionally, the drive assembly includes a guide rail and a drive cylinder that are fixedly connected to the frame. A support frame is slidably connected to the outer end of the guide rail. The piston rod of the drive cylinder is fixedly connected to the support frame. A lifting cylinder is fixedly connected to the outer end of the support frame. An L-shaped support plate is fixedly connected to the top of the lifting cylinder.

[0011] Optionally, the outer end of the L-shaped support plate is fixedly connected to the support ring, the bottom end of the L-shaped support plate is slidably connected to the support frame, a motor mounting plate is fixedly connected to the outer end of the L-shaped support plate, a drive motor is fixedly connected to the outer end of the motor mounting plate, and the output shaft of the drive motor is fixedly connected to the drive frame through a transmission shaft.

[0012] Optionally, the wrapping device includes a rotating bracket fixedly connected to a frame, a turntable assembly fixedly connected to the rotating bracket, a gear ring fixedly connected to the outer end of the turntable assembly, a drive gear meshing with the outer end of the gear ring, a wrapping motor fixedly connected to the outer end of the rotating bracket, and the output shaft of the wrapping motor fixedly connected to the drive gear.

[0013] Optionally, a first tension roller and a second tension roller are fixedly connected to the outer end of the toothed ring, and an unwinding roller is also fixedly connected to the outer end of the toothed ring, with a film roll on the unwinding roller.

[0014] Optionally, the film clamping mechanism includes a film clamping bracket fixedly connected to the rotating bracket, a clamping cylinder fixedly connected to the outer end of the film clamping bracket, a connecting plate fixedly connected to the piston rod end of the clamping cylinder, and a pneumatic gripper fixedly connected to the outer end of the connecting plate.

[0015] Optionally, a cutting cylinder is fixedly connected to the outer end of the connecting plate, a cutting blade is fixedly connected to the piston rod of the cutting cylinder, and a guide rod is fixedly connected to the outer end of the connecting plate, the guide rod passing through the membrane clamping bracket and slidingly connected to the membrane clamping bracket.

[0016] This utility model has the following advantages and beneficial effects:

[0017] In this invention, by setting up a sealing component and a slip ring component, hot air shrinkage technology is used to fix the end of the membrane material. Through the heat spreader and air hole structure inside the arc-shaped cover, as well as the rotating hot air transmission of the slip ring component, 360° all-round heating of the membrane material end is achieved, causing the membrane material to shrink and deform, and tightly adhere to the surface of the pipe fitting. This method can effectively solve the problem of fixing the membrane material end, ensuring the stability of the packaging. Compared with the traditional packaging method that relies solely on static friction, there will be no loosening or displacement of the membrane material, thus avoiding packaging loosening and failure, and improving the reliability and transportation safety of PVC pipe fitting packaging. Attached Figure Description

[0018] Figure 1 The overall structure of the PVC pipe fitting packaging film coating mechanism of this utility model Figure 1 ;

[0019] Figure 2 The overall structure of the PVC pipe fitting packaging film coating mechanism of this utility model Figure 2 ;

[0020] Figure 3 This is a structural diagram of the drive component of this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified view of a section at point A in the middle;

[0022] Figure 5 This is a structural diagram of the packaging component of this utility model;

[0023] Figure 6 This is a structural diagram of the membrane clamping mechanism of this utility model;

[0024] Figure 7 This is a front view of the film-coating mechanism for PVC pipe fitting packaging according to this utility model;

[0025] Figure 8 This is a schematic diagram of the cutting and packaging of this utility model.

[0026] Reference numerals: 1. Frame; 2. Pipe fitting; 3. Wrapping and coating device; 301. Rotating support; 302. Turntable assembly; 303. Gear ring; 304. Drive gear; 305. Wrapping motor; 306. First tension roller; 307. Second tension roller; 308. Unwind roller; 309. Film roll; 4. Encapsulation assembly; 401. Arc plate; 402. Arc cover; 403. Heat spreader; 404. Air vent; 405. Pressure roller; 406. Drive frame; 407. Support semi-ring; 408. Support 5. Support ring; 501. Drive assembly; 502. Guide rail; 503. Drive cylinder; 504. Support frame; 505. Lifting cylinder; 506. L-shaped support plate; 507. Motor mounting plate; 508. Drive motor; 509. Transmission shaft; 6. Film clamping mechanism; 601. Film clamping bracket; 602. Clamping cylinder; 603. Connecting plate; 604. Pneumatic gripper; 605. Cutting cylinder; 606. Cutting blade; 607. Guide rod; 7. Sealing ring; 8. Outer ring; 9. Air supply duct; 10. Conveying air duct. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Example

[0030] like Figures 1-8 As shown, a film-coating device for packaging PVC pipe fittings includes a frame 1, a wrapping film-coating device 3, a sealing component 4, a drive component 5, and a film clamping mechanism 6.

[0031] The wrapping device 3 is installed on the frame 1 and uses rotation to spirally wrap the tube 2. When the wrapping ends, the clamping mechanism 6 clamps and cuts the film. Then, the drive assembly 5 drives the packaging assembly 4 to move to the designated position and transmits hot air to the arc-shaped cover through the slip ring assembly. The cut film end is then treated with hot air to shrink and firmly fix the film, thus completing the entire packaging process.

[0032] like Figures 1-5As shown, the encapsulation component 4 includes two arc-shaped plates 401 with a fixed spacing. An arc-shaped cover 402 is fixedly connected to the outer end of the arc-shaped plates 401. The arc-shaped cover 402 and the arc-shaped plates 401 together form a relatively closed heating cavity. A heat-spreading plate 403 is fixedly connected to the inner wall of the arc-shaped cover 402. Several air holes 404 are opened on the heat-spreading plate 403 to ensure uniform distribution of hot air. Two pressing rollers 405 are rotatably connected to the arc-shaped plates 401. The pressing rollers 405 abut against the wrapping film and compact and shape the film material under the action of hot air. A drive frame 406 is fixedly connected to the outer end of the arc-shaped plates 401. The drive frame 406 is fixedly connected to the drive assembly 5. A support half-ring 407 is fixedly connected to the outer end of the drive frame 406. The outer end of the support half-ring 407 is rotatably mounted on the support ring. A slip ring assembly for transmitting hot air is rotatably connected to the outer end of the support ring 408.

[0033] like Figure 6 As shown, the slip ring assembly includes a sealing ring 7 fixedly connected to the outer wall of the support ring 408. An outer ring 8 is rotatably connected to the outer wall of the support ring 408. The inner wall of the outer ring 8 abuts against the sealing ring 7 to form a reliable rotary seal, preventing hot air leakage. An air supply pipe 9 is fixedly connected to the outer wall of the outer ring 8. The air supply pipe 9 passes through the arc plate 401 and communicates with the arc cover 402. A conveying air duct 10 is opened inside the support ring 408. The conveying air duct 10 communicates with the outer ring 8 to form a complete hot air transmission channel, realizing the transmission of hot air from the fixed heat source to the rotary heating cavity.

[0034] like Figures 1-4 As shown, the drive assembly 5 includes a guide rail 501 and a drive cylinder 502 fixedly connected to the frame 1. The guide rail 501 is a linear guide rail, and a support frame 503 is slidably connected to the outer end of the guide rail 501. The drive cylinder 502 drives the support frame 503 to move along the guide rail 501. A lifting cylinder 504 is fixedly connected to the outer end of the support frame 503, and an L-shaped support plate 505 is fixedly connected to the top of the lifting cylinder 504.

[0035] The outer end of the L-shaped support plate 505 is fixedly connected to the support ring 408. The outer end of the L-shaped support plate 505 is fixedly connected to the motor mounting plate 506. The outer end of the motor mounting plate 506 is fixedly connected to the drive motor 507. The drive motor 507 is an AC servo motor. The output shaft of the drive motor 507 is fixedly connected to the drive frame 406 through the transmission shaft 508 to realize precise rotation control of the encapsulation component 4. When the tube 2 is wrapped with film, the drive component 5 drives the encapsulation component 4 back to the initial position. The tube 2 can freely pass through the wrapping and coating device 3. When encapsulating, the drive component 5 drives the encapsulation component 4 from the initial position to the encapsulation position to encapsulate the tube 2.

[0036] In this invention, when the tube 2 completes spiral winding to the end, the drive assembly 5 is activated, driving the encapsulation assembly 4 to move to the encapsulation position. The encapsulation assembly 4 then pushes the winding film to the position of the clamping mechanism 6. Figure 8 As shown, the film clamping mechanism 6 cuts and clamps the wrapping film to facilitate the next wrapping.

[0037] First, the drive cylinder 502 drives the support frame 503 to move along the guide rail 501 to the encapsulation position near the end of the tube 2. After it reaches the position, the lifting cylinder 504 on the support frame 503 drives the L-shaped support plate 505 to rise, so that the output shaft of the drive motor 507 is concentric with the tube 2. At this time, the two clamping rollers 405 abut against the wrapping film on the outer wall of the tube 2. Then, the drive motor 507 is started to drive the drive frame 406 to rotate. The drive frame 406 drives the two clamping rollers 405 to rotate and clamp. When it rotates to the position of the film clamping mechanism 6, the film clamping mechanism 6 cuts the wrapping film and simultaneously sends it into the conveying air duct in the support ring 408. Heated air is introduced into the heating chamber 10. After exiting through the conveying air duct 10, the hot air enters the rotating outer ring 8. The hot air then enters the arc-shaped cover 402 through the air supply pipe 9. After the distribution adjustment of the heat spreader 403 and the air holes 404, a uniform temperature field is formed in the heating chamber. Under the action of hot air, the wrapping film begins to shrink and deform, and the film material tightly adheres to the surface of the pipe fitting 2. At the same time, the pressure roller 405 applies appropriate pressure. Under the action of uniform heating and pressing, the film material forms a tight and reliable sealing layer. After the process is completed, the hot air system is turned off, and the drive component 5 drives the sealing component 4 back to the initial position, waiting for the next sealing.

[0038] Because the encapsulation component 4 adopts a rotating design, it can achieve 360° all-round hot air treatment, avoiding the problems of local overheating or uneven heating of fixed heating methods, ensuring the stability of encapsulation quality, and preventing the film material from loosening and shifting during the transportation of the tube 2, which would lead to loose packaging.

[0039] like Figures 1-2 As shown, the wrapping device 3 includes a rotating bracket 301 fixedly connected to the frame 1. A turntable assembly 302 is rotatably connected to the rotating bracket 301. A toothed ring 303 is provided on the outer periphery of the turntable assembly 302. A drive gear 304 meshes with the outer end of the toothed ring 303. A wrapping motor 305 is fixedly connected to the outer end of the rotating bracket 301. The output shaft of the wrapping motor 305 is fixedly connected to the drive gear 304, and the turntable assembly 302 is driven to rotate through gear transmission.

[0040] The outer end of the toothed ring 303 is fixedly connected to the first tension roller 306 and the second tension roller 307, which are used to adjust the tension of the wrapping film. The outer end of the toothed ring 303 is also fixedly connected to the unwinding roller 308, on which the film roll 309 is provided. The film roll 309 is a heat shrink film. The wrapping motor 305 is a variable frequency speed control motor.

[0041] During the wrapping process, the existing feeding mechanism pushes the tube 2 past the center of the turntable assembly 302. As the tube 2 moves, the wrapping motor 305 drives the drive gear 304, which in turn drives the gear ring 303 to rotate around the tube 2. The film material is released from the film roll 309 and, after tension adjustment by the first tension roller 306 and the second tension roller 307, is wound spirally around the surface of the tube 2. By controlling the ratio of the axial movement speed of the tube 2 to the rotation speed of the turntable assembly 302, the overlap rate of the spiral winding can be precisely controlled, ensuring the integrity and aesthetics of the packaging and guaranteeing the consistency of the wrapping quality.

[0042] like Figure 1 and Figures 6-8 As shown, the film clamping mechanism 6 includes a film clamping bracket 601 fixedly connected to the rotating bracket 301. A clamping cylinder 602 is fixedly connected to the outer end of the film clamping bracket 601. A connecting plate 603 is fixedly connected to the end of the piston rod of the clamping cylinder 602. A pneumatic gripper 604 is fixedly connected to the outer end of the connecting plate 603. The pneumatic gripper 604 adopts a parallel gripper structure and can reliably clamp film materials of various thicknesses.

[0043] A cutting cylinder 605 is fixedly connected to the outer end of the connecting plate 603. A cutting blade 606 is fixedly connected to the piston rod of the cutting cylinder 605, which can cleanly cut the film material. A guide rod 607 is fixedly connected to the outer end of the connecting plate 603. The guide rod 607 passes through the film clamping bracket 601 and is slidably connected to the film clamping bracket 601, providing support and guidance for the cutting blade 606 and ensuring precise guidance of the cutting action.

[0044] After the winding is completed, the turntable assembly 302 stops rotating, and the drive assembly 5 drives the encapsulation assembly 4 to contact the winding film, so that the pressure roller 405 pushes the winding film to the middle of the gap of the pneumatic gripper 604. The clamping mechanism 6 is activated, and the clamping cylinder 12 pushes the pneumatic gripper 14 to clamp the end of the film material to ensure the stability of the film material position. Then the cutting cylinder 15 pushes the cutting blade 16 to quickly cut the film material to form a flat cut surface, avoiding the film material tearing and affecting the encapsulation effect. After cutting, the drive assembly 5 drives the encapsulation assembly 4 to perform heat encapsulation.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A film-coating mechanism for packaging PVC pipe fittings, comprising a frame (1) and pipe fittings (2), characterized in that, The top of the frame (1) is fixedly connected to a wrapping device (3) and a packaging component (4). The top of the frame (1) is also fixedly connected to a drive component (5) for driving the packaging component (4). The outer end of the wrapping device (3) is also fixedly connected to a film clamping mechanism (6) for cutting the wrapping film. The encapsulation component (4) includes two arc-shaped plates (401) with a fixed spacing. An arc-shaped cover (402) is fixedly connected to the outer end of the arc-shaped plate (401). A heat-spreading plate (403) is fixedly connected to the inner wall of the arc-shaped cover (402). Several air holes (404) are opened on the heat-spreading plate (403). Two pressing rollers (405) are rotatably connected to the arc-shaped plate (401). The pressing rollers (405) abut against the wrapping film. A drive frame (406) is fixedly connected to the outer end of the arc-shaped plate (401). The drive frame (406) is fixedly connected to the drive assembly (5). A support half-ring (407) is fixedly connected to the outer end of the drive frame (406). The outer end of the support half-ring (407) is rotatably mounted on a support ring (408). A slip ring for transmitting hot air is rotatably connected to the outer end of the support ring (408).

2. The film-coating mechanism for packaging PVC pipe fittings according to claim 1, characterized in that: The slip ring includes a sealing ring (7) fixedly connected to the outer wall of the support ring (408). The outer wall of the support ring (408) is rotatably connected to an outer ring (8). The inner wall of the outer ring (8) abuts against the sealing ring (7). The outer wall of the outer ring (8) is fixedly connected to an air supply pipe (9). The air supply pipe (9) passes through the arc plate (401) and communicates with the arc cover (402). A conveying air duct (10) is opened in the support ring (408), and the conveying air duct (10) communicates with the outer ring (8).

3. The film-coating mechanism for PVC pipe fitting packaging according to claim 1, characterized in that: The drive assembly (5) includes a guide rail (501) and a drive cylinder (502) fixedly connected to the frame (1). A support frame (503) is slidably connected to the outer end of the guide rail (501). The piston rod of the drive cylinder (502) is fixedly connected to the support frame (503). A lifting cylinder (504) is fixedly connected to the outer end of the support frame (503). An L-shaped support plate (505) is fixedly connected to the top of the lifting cylinder (504).

4. The film-coating mechanism for packaging PVC pipe fittings according to claim 3, characterized in that: The outer end of the L-shaped support plate (505) is fixedly connected to the support ring (408), the bottom end of the L-shaped support plate (505) is slidably connected to the support frame (503), the outer end of the L-shaped support plate (505) is fixedly connected to the motor mounting plate (506), the outer end of the motor mounting plate (506) is fixedly connected to the drive motor (507), and the output shaft of the drive motor (507) is fixedly connected to the drive frame (406) through the transmission shaft (508).

5. A film-coating mechanism for packaging PVC pipe fittings according to claim 1, characterized in that: The wrapping and coating device (3) includes a rotating bracket (301) fixedly connected to the frame (1), a turntable assembly (302) fixedly connected to the rotating bracket (301), a gear ring (303) fixedly connected to the outer end of the turntable assembly (302), a drive gear (304) meshing with the outer end of the gear ring (303), a wrapping motor (305) fixedly connected to the outer end of the rotating bracket (301), and the output shaft of the wrapping motor (305) fixedly connected to the drive gear (304).

6. A film-coating mechanism for packaging PVC pipe fittings according to claim 5, characterized in that: The outer end of the toothed ring (303) is fixedly connected to a first tension roller (306) and a second tension roller (307), and the outer end of the toothed ring (303) is also fixedly connected to an unwinding roller (308), on which a film roll (309) is provided.

7. A film-coating mechanism for packaging PVC pipe fittings according to claim 1, characterized in that: The film clamping mechanism (6) includes a film clamping bracket (601) fixedly connected to a rotating bracket (301). A clamping cylinder (602) is fixedly connected to the outer end of the film clamping bracket (601). A connecting plate (603) is fixedly connected to the piston rod end of the clamping cylinder (602). A pneumatic gripper (604) is fixedly connected to the outer end of the connecting plate (603).

8. A film-coating mechanism for packaging PVC pipe fittings according to claim 7, characterized in that: A cutting cylinder (605) is fixedly connected to the outer end of the connecting plate (603). A cutting blade (606) is fixedly connected to the piston rod of the cutting cylinder (605). A guide rod (607) is fixedly connected to the outer end of the connecting plate (603). The guide rod (607) passes through the membrane clamping bracket (601) and is slidably connected to the membrane clamping bracket (601).

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