Sanitary napkin product coating and envelope sealing device

Abstract

The utility model provides a sanitary napkin product wrapping and film wrapping sealing device which comprises a folding mechanism, an air suction hole, a conveying belt, a belt, an air suction cavity, an air suction pump, an air suction groove, a sealing plate and a reciprocating mechanism. According to the sanitary towel, the sealing plate is arranged, the air suction groove located on the outermost side of the air suction cavity can be shielded and blocked only by sliding the sealing plate, and therefore the phenomenon that suction force is wasted due to the fact that sanitary towels small in size are folded and wrapped with toilet paper is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary napkin coating equipment, in particular to a sanitary napkin product coating and film sealing device. Background Art

[0002] The production principle of sanitary napkins is actually a physical combination and pressing and cutting process of non-woven fabrics or cotton fabrics, perforated films, fluff pulp, water-absorbing resins, cast films, hot-melt adhesives, etc. through a series of mechanical equipment. The mechanical equipment for sanitary napkin production generally includes, from front to back: the crushing of fluff pulp and the mixing and feeding of polymers into boxes, the cotton cutting knife assembly, the diversion assembly, the circumferential sealing assembly, the forming knife assembly, the four-in-one pressing and cutting assembly, and the fabric, bottom film, chip, bottom film, film unwinding device for film coating and the glue machine system of the face film, bottom film, and dispensing glue gun.

[0003] Among them, the film coating process mainly involves a coating and sealing device for toilet paper, which is used to coat the cotton core of the sanitary napkin with toilet paper or dust-free paper. During the coating process, the existing equipment mainly pastes the cotton core in the middle of the toilet paper, and then two coating plates fold the two side edges of the toilet paper or dust-free paper, thereby coating the cotton core, and then sending it to the cutting place through a conveyor belt for compaction and sealing of each sanitary napkin, and finally cutting each sanitary napkin; suction holes are provided on the belt of the conveyor belt at the folding process, and the suction holes are aligned with the suction grooves in the lower suction cavity, so as to adsorb while transporting the toilet paper, thereby preventing the toilet paper from slipping during the folding process, thereby improving the folding quality;

[0004] However, when producing smaller-sized sanitary napkins, it is necessary to reduce the folding width of the toilet paper. At this time, since there is no toilet paper above the suction holes at both ends, the surrounding air will be adsorbed, resulting in waste of suction force. Summary of the Utility Model

[0005] The purpose of the utility model is to design a sanitary napkin product coating and film sealing device to solve the problems raised in the background art. To achieve the above purpose, the utility model provides the following technical solutions: including a conveyor belt with a number of columns of suction holes provided on a folding mechanism, a suction cavity installed inside the conveyor belt and attached to the bottom of the belt in the conveyor belt, and a suction pump communicated with the suction cavity; a number of suction grooves are provided above the suction cavity, and the number of suction grooves are respectively aligned with each column of suction holes. Two sealing plates are slidably connected to the inner top of the suction cavity, and the two sealing plates are symmetrically distributed on both sides of the suction cavity. When the two sealing plates slide towards each other through a reciprocating mechanism installed inside the suction cavity, a number of suction grooves at both ends are blocked.

[0006] Further, the reciprocating mechanism includes a bidirectional screw rotatably connected to the inside of the air suction cavity and a motor fixed to the end of the bidirectional screw. The motor is fixed to the outer wall of the air suction cavity, and the two sealing plates are respectively threadedly connected to two thread segments with different helix directions in the bidirectional screw.

[0007] Further, the middle of the bidirectional screw is rotatably connected to a support ear fixed to the top of the air suction cavity. An infrared displacement sensor for measuring the moving distance of the sealing plate is fixed to the support ear. Both the air suction pump and the infrared displacement sensor are connected to a controller.

[0008] Further, an installation cavity and two negative pressure cavities are provided inside the air suction cavity. The installation cavity is located between the two negative pressure cavities. A notch for the sealing plate to slide is provided at the top of the installation cavity. The reciprocating mechanism is located inside the installation cavity, and both the two negative pressure cavities are connected to the air suction pump.

[0009] Further, the top plane of the installation cavity is lower than the top plane of the air suction groove.

[0010] Further, side plates are provided on the sealing plate, and the side plates are closely attached to the outside of the notch.

[0011] Further, two pressure equalizing cavities are provided inside the negative pressure cavity. Inside each pressure equalizing cavity, from top to bottom, there are an adsorption cavity, a pressure equalizing cavity, and a pipeline distribution cavity respectively. A plurality of the air suction grooves are provided at the top of the adsorption cavity. A plurality of air suction units are provided inside each pressure equalizing cavity. The air suction units are connected to the adsorption cavity through a plurality of negative pressure holes. The pipeline distribution cavity is provided with a pressure equalizing pipe network connected to the plurality of air suction units, and the air inlet pipe of the pressure equalizing pipe network is connected to the air suction pump.

[0012] Further, four air suction units are provided. The pressure equalizing pipe network includes a suction pipe group connected to the air suction units and a tower-shaped pipe group for connecting a plurality of the suction pipe groups. The air inlet pipe is provided on the tower-shaped pipe group.

[0013] Further, the suction pipe group includes a plurality of first vertical pipes connected to the air suction units and a first horizontal pipe for connecting the plurality of first vertical pipes.

[0014] Further, the tower-shaped pipe group includes a second horizontal pipe for connecting the first vertical pipes located in the middle of a plurality of the suction pipe groups, a third horizontal pipe connected to the second horizontal pipe through a plurality of second vertical pipes, a fourth horizontal pipe connected to the third horizontal pipe through a plurality of third vertical pipes, and the air inlet pipe connected to the middle of the fourth horizontal pipe. The second vertical pipes are located between two adjacent first vertical pipes, the third vertical pipes are located between two adjacent second vertical pipes, and the air inlet pipe is located between two adjacent third vertical pipes.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is provided with a sealing plate. By simply sliding the sealing plate, the suction groove located on the outermost side of the suction cavity can be blocked, thereby preventing the phenomenon of suction waste caused by folding and wrapping toilet paper around sanitary napkins with smaller sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the overall structure of the suction cavity;

[0019] Figure 3 is a schematic cross-sectional view of the suction cavity in the horizontal direction;

[0020] Figure 4 is a schematic cross-sectional view of the reciprocating mechanism;

[0021] Figure 5 is a schematic longitudinal cross-sectional view of the suction cavity.

[0022] Wherein: 1. Suction cavity; 2. Transmission belt; 3. Folding plate; 4. Adsorption cavity; 5. Negative pressure hole; 6. Sealing plate; 7. Side plate; 8. Bidirectional screw; 9. Motor; 10. Reciprocating mechanism; 11. Installation cavity; 12. Support ear; 13. Notch; 14. Suction unit; 15. Pipeline distribution cavity; 16. Intake pipe; 17. Tower-shaped pipe group; 18. Exhaust pipe group; 19. Suction groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in combination with the drawings and preferred embodiments, describe in detail the specific implementation manners, mechanisms, features, and their effects of the present utility model as follows.

[0024] Embodiment: Please refer to Figures 1-5, a sanitary napkin product wrapping and film sealing device, including a conveyor belt 2 with a number of rows of suction holes provided on a folding mechanism, a suction cavity 1 installed inside the conveyor belt 2 and attached to the bottom of the belt in the conveyor belt 2, and a suction pump communicated with the suction cavity 1; wherein, the folding mechanism further includes a folding plate 3 installed on the top of the suction cavity 1, the folding width of the toilet paper by this folding plate 3 can be adjusted, and the folding process of the toilet paper is the same as the prior art, so no more details will be given in this article; and there are a number of suction grooves 19 provided above the suction cavity 1, and the number of suction grooves 19 are respectively aligned with each row of suction holes. Two sealing plates 6 are slidably connected to the inner top of the suction cavity 1, and the two sealing plates 6 are symmetrically distributed on both sides of the suction cavity 1. When the two sealing plates 6 slide towards each other through a reciprocating mechanism 10 installed inside the suction cavity 1, they block a number of suction grooves 19 located at both ends; therefore, when folding and wrapping the toilet paper for a sanitary napkin with a smaller size, only by sliding the sealing plates 6 to block and seal the suction grooves 19 that adsorb the surrounding air at both ends of the suction cavity 1, the waste of suction force can be prevented; in addition, a rubber plate can be installed on the top of the sealing plates 6 to improve the sealing quality.

[0025] In this embodiment, the reciprocating mechanism 10 includes a bidirectional screw 8 rotatably connected inside the suction cavity 1 and a motor 9 fixed to the end of the bidirectional screw 8. The motor 9 is fixed to the outer wall of the suction cavity 1. The two sealing plates 6 are respectively threadedly connected to two threaded sections with different thread directions in the bidirectional screw 8; wherein, the rotatable connection method can adopt the form of bearing connection. When the motor 9 is started, it will drive the bidirectional screw 8 to rotate, thereby causing the two sealing plates 6 to move towards each other, and then block the outermost suction grooves 19; in addition, since the suction force of other suction grooves 19 will increase after the outermost suction grooves 19 are blocked, in order to prevent the toilet paper from being damaged due to excessive suction force, in this embodiment, the middle of the bidirectional screw 8 is rotatably connected to a support ear 12 fixed to the top of the suction cavity 1. A infrared displacement sensor for measuring the moving distance of the sealing plate 6 is fixed on the support ear 12. Both the suction pump and the infrared displacement sensor are communicated with a controller. The controller can control the power of the suction pump according to the moving distance of the sealing plate 6 fed back by the infrared displacement sensor, so as to ensure the constancy of the suction force of the suction grooves 19.

[0026] In other embodiments, an installation cavity 11 and two negative pressure cavities are provided inside the air suction cavity 1. The installation cavity 11 is located between the two negative pressure cavities. A notch 13 for the sliding of the sealing plate 6 is provided at the top of the installation cavity 11. The reciprocating mechanism 10 is located inside the installation cavity 11. Both negative pressure cavities are communicated with the air suction pump, so that the suction force at the front and rear positions of the suction groove 19 is as consistent as possible, ensuring the stable adsorption of the toilet paper. The top plane of the installation cavity 11 is lower than the top plane of the suction groove 19, ensuring the continuity of the top plane of the suction groove 19 and preventing the top of the installation cavity 11 from scratching the belt. The sealing plate 6 is provided with side plates 7, and the side plates 7 are closely attached to the outside of the notch 13. Four side plates 7 are provided on one sealing plate 6, which can ensure that the two negative pressure cavities are independent of each other during the movement of the sealing plate 6, preventing interference caused by the suction force on both sides.

[0027] Inside the negative pressure cavity, two pressure equalizing cavities are provided. Inside each pressure equalizing cavity, from top to bottom, there are an adsorption cavity 4, a pressure equalizing cavity, and a pipeline distribution cavity 15 respectively. A number of suction grooves 19 are provided at the top of the adsorption cavity 4. A number of air suction units 14 are provided inside each pressure equalizing cavity. The air suction units 14 are communicated with the adsorption cavity 4 through a number of negative pressure holes 5. The pipeline distribution cavity 15 is provided with a pressure equalizing pipe network communicated with a number of air suction units 14. The intake pipe 16 of the pressure equalizing pipe network is communicated with the air suction pump. Dividing the negative pressure cavity into two pressure equalizing cavities further ensures the consistency of the suction force at each place in the negative pressure cavity and improves the adsorption quality of the toilet paper. Four air suction units 14 are provided. The pressure equalizing pipe network includes a suction pipe group 18 communicated with the air suction units 14 and a tower-shaped pipe group for communicating a number of suction pipe groups 18. The intake pipe 16 is provided on the tower-shaped pipe group 17. The suction pipe group 18 includes a number of first vertical pipes communicated with the air suction units 14 and a first horizontal pipe for communicating a number of first vertical pipes. The tower-shaped pipe group 17 includes a second horizontal pipe for communicating the first vertical pipes located in the middle of a number of suction pipe groups 18, a third horizontal pipe communicated with the second horizontal pipe through a number of second vertical pipes, a fourth horizontal pipe communicated with the third horizontal pipe through a number of third vertical pipes, and an intake pipe 16 communicated with the middle of the fourth horizontal pipe. The second vertical pipes are located between two adjacent first vertical pipes, the third vertical pipes are located between two adjacent second vertical pipes, and the intake pipe 16 is located between two adjacent third vertical pipes, further improving the consistency of the suction force at each place in the entire air suction cavity 1. In addition, the intake pipe 16 of each tower-shaped pipe group 17 is respectively connected to an air suction pump, and the powers of the four air suction pumps are the same, which can improve the anti-risk ability of the air suction cavity 1. When one air suction pump breaks down, it will not cause the paralysis of the entire folding mechanism.

[0028] Working principle: When folding and wrapping the toilet paper for a sanitary napkin with a smaller size, only need to start the motor 9 to drive the bidirectional screw 8 to rotate, which can cause the two sealing plates 6 to move towards each other, and then block and seal the suction grooves 19 on the outermost side that will adsorb the surrounding air, thus preventing the waste of suction force.

[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are only for the purpose of illustration.

[0030] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A sanitary napkin product covering and film sealing device, characterized in that: The invention comprises a conveyor belt (2) with a plurality of rows of suction holes arranged on a folding mechanism, a suction chamber (1) installed inside the conveyor belt (2) and in contact with the bottom of the belt in the conveyor belt (2), and a suction pump connected to the suction chamber (1); a plurality of suction grooves (19) are arranged above the suction chamber (1), and the plurality of suction grooves (19) are respectively aligned with each row of the suction holes; two sealing plates (6) are slidably connected to the inner top of the suction chamber (1), and the two sealing plates (6) are symmetrically distributed on both sides of the suction chamber (1); when the two sealing plates (6) slide towards each other through a reciprocating mechanism (10) installed inside the suction chamber (1), the plurality of suction grooves (19) located at the two side ends are blocked.

2. The sanitary napkin product covering and film sealing device according to claim 1, characterized in that: The reciprocating mechanism (10) comprises a bidirectional screw (8) rotatably connected to the inside of the suction chamber (1) and a motor (9) fixed to the end of the bidirectional screw (8); the motor (9) is fixed to the outer wall of the suction chamber (1); and the two sealing plates (6) are respectively threadedly connected to two thread segments of different rotation directions in the bidirectional screw (8).

3. The sanitary napkin product covering and film sealing device according to claim 2, characterized in that: The middle portion of the bidirectional screw (8) is rotatably connected to a support ear (12) fixedly connected to the top of the suction chamber (1); an infrared displacement sensor for measuring the moving distance of the sealing plate (6) is fixedly connected to the support ear (12); and the suction pump and the infrared displacement sensor are both connected to a controller.

4. The sanitary napkin product covering and film sealing device according to claim 1, characterized in that: The interior of the suction cavity (1) is provided with an installation cavity (11) and two negative pressure cavities, the installation cavity (11) is located between the two negative pressure cavities, the top of the installation cavity (11) is provided with a notch (13) for the sealing plate (6) to slide, the reciprocating mechanism (10) is located inside the installation cavity (11), and the two negative pressure cavities are both connected to the suction pump.

5. The sanitary napkin product covering and film sealing device according to claim 4, characterized in that: The top plane of the installation cavity (11) is lower than the top plane of the air suction groove (19).

6. The sanitary napkin product covering and film sealing device according to claim 4, characterized in that: The sealing plate (6) is provided with a side plate (7), and the side plate (7) is closely attached to the outer side of the notch (13).

7. The sanitary napkin product covering and film sealing device according to claim 4, characterized in that: Two equalizing pressure chambers are arranged inside the negative pressure chamber, and the interior of each equalizing pressure chamber comprises an adsorption chamber (4), an equalizing pressure chamber and a pipeline distribution chamber (15) from top to bottom. A plurality of suction grooves (19) are arranged on the top of the adsorption chamber (4), and a plurality of suction units (14) are arranged inside each equalizing pressure chamber. The suction units (14) are connected to the adsorption chamber (4) through a plurality of negative pressure holes (5). The pipeline distribution chamber (15) is provided with an equalizing pressure pipe network connected to the plurality of suction units (14), and the air inlet pipe (16) of the equalizing pressure pipe network is connected to the suction pump.

8. The sanitary napkin product covering and film sealing device according to claim 7, characterized in that: Four air intake units (14) are provided, and the pressure equalizing pipe network comprises an air extraction pipe group (18) connected to the air intake unit (14), and a tower-shaped pipe group (17) used to connect a plurality of the air extraction pipe groups (18), wherein the tower-shaped pipe group (17) is provided with the air intake pipe (16).

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