CN219523034U

CN219523034U - Plastic bag's inflation film manufacturing extension device

Info

Publication number: CN219523034U
Application number: CN202320524497.1U
Authority: CN
Inventors: 张卫卫
Original assignee: Linhai Jiabao Packaging Co ltd
Current assignee: Linhai Jiabao Packaging Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-08-15
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses a film blowing extension device of a plastic bag, which comprises a film blowing frame, wherein the bottom of the film blowing frame is provided with a film outlet head, the middle part of the film outlet head is provided with a circular groove, the center of the circular groove is provided with an exhaust pipe, a rotatable blowing ring is arranged between the film outlet head and the exhaust pipe, a driving assembly is connected between the blowing ring and the bottom of the film blowing frame, a plurality of nozzles are equidistantly arranged on the upper side wall of the blowing ring around the exhaust pipe, wherein annular pressurizing cavities are formed between the blowing ring and the film outlet head, the pressurizing cavities are communicated with the nozzles, the outer walls of the nozzles are provided with air guide holes, the air guide holes are obliquely arranged in the same direction around the same axis, cold air enters the pressurizing cavities through the air guide pipes and can be sprayed out from the air guide holes beside the nozzles, the sprayed air flow acts on the inner walls of an outer expanding plate and an inner air ring, cyclone air flow can be formed, the cyclone air flow circulates from bottom to top, the heat exchange time is prolonged, the heat exchange effect is improved, and plastic cooling of the plastic bag is facilitated.

Description

Plastic bag's inflation film manufacturing extension device

Technical Field

The utility model relates to the technical field of film blowing, in particular to a film blowing extension device for a plastic bag.

Background

The film blowing is a plastic processing method, namely a plastic processing technology for heating and melting plastic particles and then blowing into a film, generally adopts extrusion molding of a tubular film blank by polymer, and the tubular film is inflated to a required thickness by high-pressure air under a better melt flow state, and is formed into the film after cooling and shaping;

chinese patent publication No. CN105415660a discloses a film blowing machine, and through the mutual cooperation of the first air outlet and the second air outlet, the inflation ratio of the film blowing machine can be adjusted more flexibly, which has the following drawbacks: (1) The air ring in the technology adopts an air flow direct blowing mode to supply air, so that the heat exchange time of cold air and the film is short, and the cooling effect is poor; (2) The plurality of air supply pipes are circumferentially arranged at equal intervals to form an air ring, and air is supplied at a fixed position, so that different expansion ratios of films in different directions are easily caused, and uniform molding is not facilitated; (3) The fixed core rod is in a columnar structure, and when the diameter of the plastic bag needs to be increased, the larger pressure is required to be increased, so that the expansion process of plastic bag film blowing is not controlled.

Disclosure of Invention

The utility model provides a film blowing and stretching device for a plastic bag, which solves the technical problem that the film blowing and stretching of the traditional plastic bag cannot improve the film blowing and forming quality.

In order to solve the technical problems, the film blowing and stretching device for the plastic bag comprises a film blowing frame, wherein a film outlet head is arranged at the bottom of the film blowing frame, a circular groove is formed in the middle of the film outlet head, an exhaust pipe is arranged in the center of the circular groove, a rotatable blowing ring is arranged between the film outlet head and the exhaust pipe, a driving assembly is connected between the blowing ring and the bottom of the film blowing frame, a plurality of nozzles are arranged on the upper side wall of the blowing ring at equal intervals around the exhaust pipe, an annular pressurizing cavity is formed between the blowing ring and the film outlet head, the pressurizing cavity is communicated with all the nozzles, air guide holes are formed in the outer walls of the nozzles, and a plurality of air guide holes are obliquely arranged in the same direction.

Preferably, the film blowing frame comprises a base table and two vertical rods fixed on the upper side of the base table, a plurality of connecting frames are fixedly connected between the two vertical rods, the connecting frame on the lowest side is fixedly connected with a film outlet head, two transmission rollers are rotationally embedded between inner walls on two sides of the connecting frame on the uppermost side, two inclined plates are fixedly connected between the two connecting frames, and the two inclined plates are distributed in an eight-shaped structure.

Preferably, the bottom of exhaust pipe and bottom table fixed connection, the top of exhaust pipe extends to between two swash plates, the middle part outside fixedly connected with of exhaust pipe expands the board outward, expand board edge upside outward and be provided with the interior wind ring of narrowing gradually.

Preferably, the outer wall of the exhaust pipe is fixedly sleeved with a conical cover above the outer expansion plate, the conical cover is of a horn-shaped structure with a narrow bottom and a wide top, and the outer wall of the bottom of the exhaust pipe is fixedly embedded with a pressure relief pipe.

Preferably, the upper side of the film outlet head is provided with an annular extrusion seam, and a flow guide pipe and an air guide pipe are fixedly embedded on one side of the film outlet head, wherein the flow guide pipe is communicated with the extrusion seam, the air guide pipe is communicated with the pressurizing cavity, and an outer air ring which is gradually widened is arranged on the upper side of the inner edge of the air guide pipe.

Preferably, the driving assembly comprises a toothed ring fixed on the inner wall of the blowing ring and a motor fixed on the upper side of the base table, wherein the output end of the motor is fixedly connected with a gear, and the gear is meshed with the toothed ring.

Compared with the related art, the film blowing and stretching device for the plastic bag has the following beneficial effects:

according to the film blowing extension device for the plastic bag, the air guide holes are obliquely arranged in the same direction around the same axis, cold air enters the pressurizing cavity through the air guide pipe and can be sprayed out from the air guide holes at the side of the nozzle, the sprayed air flow acts on the inner walls of the outer expansion plate and the inner air ring, cyclone air flow can be formed, the cyclone air flow circulates from bottom to top, the heat exchange duration is prolonged, the heat exchange effect is improved, and the plastic bag molding cooling is facilitated;

according to the film blowing and stretching device for the plastic bag, the motor drives the gear to rotate, and the gear is meshed with the transmission toothed ring to rotate, so that the air guide hole can rotate at a high speed in the air injection process, the expansion degree of the plastic film in all directions can be kept consistent, and the plastic film expansion and molding are facilitated;

according to the plastic bag film blowing and stretching device, the exhaust pipe is extended between the two inclined plates, so that air flow can be exhausted from the exhaust pipe after being sufficiently cooled, the conical cover can guide the air flow to expand outwards, further plastic film expansion and stretching are facilitated, and plastic bag film blowing and stretching are facilitated.

Drawings

FIG. 1 is a side view of a blown film extension apparatus for a plastic bag according to the present utility model;

FIG. 2 is a top view of a film outlet head in a film blowing and stretching device for plastic bags according to the present utility model;

FIG. 3 is a bottom view of the film dispensing head of the film blowing and stretching apparatus for plastic bags according to the present utility model;

FIG. 4 is a sectional view showing the combined structure of a film outlet head, an exhaust pipe and a blowing ring in a film blowing and stretching device for plastic bags;

fig. 5 is an enlarged view of the structure a of fig. 4 of a film blowing and stretching device for plastic bags according to the present utility model.

Reference numerals in the drawings: 1. a film blowing frame; 11. a base table; 12. a vertical rod; 13. a connection frame; 14. a conveying roller; 15. a sloping plate; 2. a film outlet head; 21. extruding the seam; 22. a flow guiding pipe; 23. an air guide pipe; 24. an outer wind ring; 3. an exhaust pipe; 31. an outer expansion plate; 32. an inner wind ring; 33. a cone-shaped cover; 34. a pressure relief tube; 4. a blowing ring; 5. a drive assembly; 51. a toothed ring; 52. a motor; 53. a gear; 6. a nozzle; 61. and the air guide hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: the utility model provides a film blowing and stretching device for a plastic bag, which is shown in figures 1-5, and comprises a film blowing frame 1, wherein the film blowing frame 1 comprises a bottom table 11 and two vertical rods 12 fixed on the upper side of the bottom table 11, a plurality of connecting frames 13 are fixedly connected between the two vertical rods 12, the connecting frame 13 on the lowest side is fixedly connected with a film outlet head 2, two transmission rollers 14 are rotationally embedded between the inner walls of the two sides of the connecting frame 13 on the uppermost side, two inclined plates 15 are fixedly connected between the two remaining connecting frames 13, and the two inclined plates 15 are distributed in a splayed structure;

specifically, the two inclined plates 15 can gradually squeeze the two sides of the plastic bag to deform, so that a flat structure can be formed, and the plastic bag can be gradually attached and transported.

Further, a film outlet head 2 is arranged at the bottom of the film blowing frame 1, an annular extrusion slit 21 is arranged on the upper side of the film outlet head 2, a flow guide pipe 22 and a wind guide pipe 23 are fixedly embedded on one side of the film outlet head 2, and the flow guide pipe 22 is communicated with the extrusion slit 21;

specifically, the cross section of the extrusion slit 21 is in a drop-shaped structure with a wide bottom and a narrow top, so that molten plastic can be pulled out from the upper narrow opening in a ring shape, and after the molten plastic is cooled by contact with air, a ring-shaped plastic bag can be formed.

Further, a circular groove is formed in the middle of the film outlet head 2, an exhaust pipe 3 is arranged in the center of the circular groove, a rotatable blowing ring 4 is arranged between the film outlet head 2 and the exhaust pipe 3, the bottom end of the exhaust pipe 3 is fixedly connected with the bottom table 11, the top end of the exhaust pipe 3 extends between the two inclined plates 15, an outer expansion plate 31 is fixedly connected to the outer side of the middle of the exhaust pipe 3, and an inner blowing ring 32 which is gradually narrowed is arranged on the upper side of the edge of the outer expansion plate 31;

specifically, the longer exhaust pipe 3 can prolong the heat exchange path length of the air flow and the plastic bag, and prolong the heat exchange time.

Further, the outer wall of the exhaust pipe 3 is fixedly sleeved with a cone-shaped cover 33 above the outer expansion plate 31, the cone-shaped cover 33 is in a horn-shaped structure with a narrow bottom and a wide top, and the outer wall of the bottom of the exhaust pipe 3 is fixedly embedded with a pressure relief pipe 34;

specifically, the conical cover 33 effectively fills the space inside the plastic bag, and the volume of the filled space is gradually increased, so that the air flow can be guided to expand outwards, and the expansion and stretching of the plastic film are further assisted.

Further, a driving component 5 is connected between the blowing ring 4 and the bottom of the film blowing frame 1, the driving component 5 comprises a toothed ring 51 fixed on the inner wall of the blowing ring 4 and a motor 52 fixed on the upper side of the bottom frame 11, the output end of the motor 52 is fixedly connected with a gear 53, and the gear 53 is meshed with the toothed ring 51;

specifically, the motor 52 drives the gear 53 to rotate, the gear 53 engages with the toothed ring 51 to rotate, and the toothed ring 51 can rotate synchronously with the blowing ring 4, so that the blowing ring 4 can realize uninterrupted rotation.

Further, a plurality of nozzles 6 are equidistantly arranged on the upper side of the blowing ring 4 around the exhaust pipe 3, wherein an annular pressurizing cavity is formed between the blowing ring 4 and the film outlet head 2, the pressurizing cavity is communicated with each nozzle 6, air guide holes 61 are formed in the outer wall of each nozzle 6, a plurality of air guide holes 61 are obliquely arranged in the same direction, an air guide pipe 23 is communicated with the pressurizing cavity, and an outer air ring 24 which is gradually widened is arranged on the upper side of the inner edge of the air guide pipe 23;

specifically, the blowing ring 4 is rotatably connected between the film outlet head 2 and the exhaust pipe 3, and a ring cavity is formed at the periphery of the blowing ring 4, and the ring cavity is a pressurizing cavity, so that air flow can be blown through the nozzle 6 while the blowing ring 4 keeps rotating.

Further, specifically, an inverted trapezoid structure is formed between the sections of the inner wind ring 32 and the outer wind ring 24, and the gap between the inner wind ring 32 and the outer wind ring 24 is widened gradually from bottom to top, so that the air flow can be gradually diffused outwards;

specifically, the wind guide hole 61 faces the outer wind ring 24, and the wind guide hole 61 sprays air flow to act on the inner wall of the outer wind ring 24 to form rotating air flow.

Working principle: when the device is used, molten plastic enters the extrusion slot 21 through the flow guide pipe 22, the plastic film can be continuously pulled out upwards, meanwhile, cold air enters the pressurizing cavity through the air guide pipe 23, the cold air can be sprayed out from the air guide holes 61 at the side of the nozzle 6, the air guide holes 61 are obliquely arranged in the same direction around the same axis, the sprayed air flow acts on the inner walls of the outer expansion plate 31 and the inner air ring 32, cyclone air flow can be formed, the cyclone air flow circulates from bottom to top, the air pressure in the plastic film can be increased, the plastic film is expanded, the conical cover 33 is arranged, the air flow can be guided to be expanded outwards, the expansion and stretching of the plastic film are further facilitated, in the process, the plastic film is effectively cooled until the end part of the plastic film is extruded into a belt shape to pass through the gap between the two transmission rollers 14, and the motor 52 drives the gear 53 to rotate, and the gear 53 is meshed with the gear ring 51 to rotate, so that the air guide holes 61 can rotate at high speed in the air injection process, the expansion degree of each direction of the plastic film can be kept consistent, and the expansion and molding of the plastic film are facilitated.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plastic bag's inflation film manufacturing device, includes inflation film manufacturing frame (1), its characterized in that, inflation film manufacturing frame (1) bottom is provided with out membrane head (2), it is provided with circular slot to go out membrane head (2) middle part, and this circular slot center is provided with exhaust pipe (3), be provided with rotatable ring (4) of blowing between out membrane head (2) and exhaust pipe (3), be connected with drive assembly (5) between ring (4) and inflation film manufacturing frame (1) bottom, the last side wall of ring (4) of blowing is provided with a plurality of nozzles (6) around exhaust pipe (3) equidistance, wherein, be formed with annular booster chamber between ring (4) and the play membrane head (2), this booster chamber all communicates with each nozzle (6) and set up, just the outer wall of nozzle (6) all is provided with wind guiding hole (61), a plurality of wind guiding hole (61) syntropy slope sets up.

2. A blown film extension apparatus for plastic bags according to claim 1, wherein: the film blowing frame (1) comprises a base table (11) and two vertical rods (12) fixed on the upper side of the base table (11), a plurality of connecting frames (13) are fixedly connected between the vertical rods (12), the connecting frames (13) on the lowest side are fixedly connected with a film outlet head (2), two transmission rollers (14) are rotationally embedded between inner walls on two sides of the connecting frames (13) on the uppermost side, two inclined plates (15) are fixedly connected between the connecting frames (13), and the two inclined plates (15) are distributed in an splayed structure.

3. A blown film extension apparatus for plastic bags according to claim 2, wherein: the bottom of exhaust pipe (3) and base frame (11) fixed connection, the top of exhaust pipe (3) extends to between two swash plates (15), the middle part outside fixedly connected with of exhaust pipe (3) expands board (31) outward, expand board (31) edge upside and be provided with interior wind ring (32) of narrowing gradually outward.

4. A blown film extension apparatus for plastic bags according to claim 1, wherein: the outer wall of the exhaust pipe (3) is fixedly sleeved with a conical cover (33) above the outer expansion plate (31), the conical cover (33) is of a horn-shaped structure with a narrow lower part and a wide upper part, and the outer wall of the bottom of the exhaust pipe (3) is fixedly embedded with a pressure relief pipe (34).

5. A blown film extension apparatus for plastic bags according to claim 1, wherein: the novel plastic film extrusion device is characterized in that an annular extrusion slit (21) is formed in the upper side of the film outlet head (2), a flow guide pipe (22) and an air guide pipe (23) are fixedly embedded in one side of the film outlet head (2), the flow guide pipe (22) is communicated with the extrusion slit (21), the air guide pipe (23) is communicated with a pressurizing cavity, and an outer air ring (24) which is gradually widened is arranged on the upper side of the inner edge of the air guide pipe (23).

6. A blown film extension apparatus for plastic bags according to claim 2, wherein: the driving assembly (5) comprises a toothed ring (51) fixed on the inner wall of the blowing ring (4) and a motor (52) fixed on the upper side of the base table (11), wherein the output end of the motor (52) is fixedly connected with a gear (53), and the gear (53) is in meshed connection with the toothed ring (51).