CN114603841A

CN114603841A - Film production process

Info

Publication number: CN114603841A
Application number: CN202210307336.7A
Authority: CN
Inventors: 李拓托; 龙其成
Original assignee: Anqing Kangmingna Packaging Co ltd
Current assignee: Anqing Kangmingna Packaging Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-06-10
Also published as: ZA202210219B; WO2023030490A1

Abstract

The invention provides a film production process, which uses a film production device, the device comprises a rack positioned below a blow molding head, a herringbone plate arranged on the rack, a clamping roller arranged on the rack and positioned at the lower end of the herringbone plate, a winding roller arranged on the rack and a turntable positioned at the bottom of the rack, and the process for producing the film by adopting the film production device comprises the following steps: the rotating procedure enables the rack and the equipment on the rack to rotate together; in the extrusion process, the side part of the film bubble is extruded by the herringbone plate; and a rolling procedure is used for rolling the film. According to the invention, the turntable drives the rack to rotate, so that the herringbone plate and the clamping roller can continuously rotate around the central shaft of the blow molding head, the twisted angle of the film bubble is greatly increased under the combined action of the herringbone plate and the clamping roller, the texture of the finished film is finally more uniform, the texture of the film can be changed, and the quality of the film is further improved.

Description

Film production process

Technical Field

The invention relates to the technical field of film production, in particular to a film production process.

Background

When producing medical paper-plastic packaging bags, the transparent film is one of the indispensable raw materials. The traditional technology for producing the film is to blow the film out directly through a blow molding machine and then wind the film through a wind-up roll after the film is cooled.

However, when a film is produced by such a conventional process, the texture of the produced film is not uniform. For example, the blow head of a blow molding machine has a high flow rate in some positions and a low flow rate in some positions due to uneven temperature, which causes the thickness of the produced film to be inconsistent in some positions. For another example, the film part from the blow head is cooled quickly, and the film part is cooled slowly, so that the tightness of the produced film part is different, the product quality of the film is affected, further the subsequent processing of the medical paper-plastic packaging bag is troublesome, and the product quality of the medical paper-plastic packaging bag is affected.

In order to solve the above problems, a new film production process has appeared in the prior art, in which a blowing head of a blow molding machine is placed below the blowing head, and a nip roller is disposed above the blowing head, and the nip roller is driven by a servo motor to reciprocate around a central axis of the blowing head at a certain angle. During operation, the mechanism of blowing blows in compressed air to the membrane bubble and makes the membrane bubble inflation, and the membrane bubble constantly upwards moves, through pressing from both sides the roller and be pressed from both sides the roller and flatten and become double-deck film, and servo motor drive presss from both sides the roller here simultaneously, carries out reciprocating swing with certain angle around the center pin of blowing head, makes the texture of off-the-shelf film comparatively even.

However, in the above process, because the wind-up roll is usually fixedly arranged at one side of the nip roll, the nip roll must be taken into consideration when rotating, so the actual swing angle of the nip roll is usually not too large, and thus, although the quality is improved compared with the conventional process, the improvement degree is not high.

There is therefore a need for a process which further improves the texture of the films produced by the blow moulding machine.

Disclosure of Invention

The main object of the present invention is to provide a film production process that is able to further improve the texture of the film produced by the blow molding machine.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a film production process uses a film production device, the device comprises a rack positioned below a blow head, a herringbone plate arranged on the rack, a clamping roller arranged on the rack and positioned at the lower end of the herringbone plate, a wind-up roller arranged on the rack and a turntable positioned at the bottom of the rack, and the film production process by adopting the film production device is as follows:

s1, rotation process: starting the turntable to drive the rack to rotate around the central shaft of the blow molding head, and enabling the equipment on the rack to rotate along with the rack;

s2, extrusion process: the film bubble from the blow molding head goes downwards and passes through the herringbone plate with a large opening at the upper part and a small opening at the lower part, the position of the herringbone plate relative to the blow molding head is continuously changed under the driving of the rotation of the rack, and meanwhile, the side part of the film bubble is continuously extruded;

s3, winding: the film bubble penetrating out of the herringbone plate reaches the clamping roller, is clamped to be flat by the clamping roller to form a double-layer film, and finally reaches the winding roller to be wound by the winding roller.

Furthermore, the herringbone plate comprises two plate bodies, the distance between the two plate bodies is gradually reduced from top to bottom, and the distance between the two plate bodies is adjustable.

Further, the extrusion process may be preceded by a spraying process for spraying water mist to an outer surface of the bubble coming out of the blowing head.

Further, the spraying process sprays water mist on the outer surface of the film bubble through a spraying device, and the spraying device comprises:

the device comprises two opposite supports, a plurality of film bubble nozzles and a plurality of film bubble nozzles, wherein the supports are in a semicircular shape and are provided with a plurality of nozzles facing the film bubble nozzles;

the two sides of the support are connected with the rack through the support rods.

Furthermore, the supporting rod is arranged on the rack in a sliding mode, a third fixing block and a third screw rod which correspond to the supporting rod one to one are arranged on the rack, and one end of the third screw rod penetrates through the third fixing block and is rotatably connected with the supporting rod while the third screw rod is in spiral fit with the third fixing block.

Furthermore, after the extrusion process and before the winding process, the method also comprises a baking process for baking the film to accelerate the drying speed of the film.

Further, the film is dried through a baking device in the baking process, the baking device is connected with the rack and located on a traveling path between the film and the winding roller from the nip roller, the baking device is composed of two heating plates, and the film penetrates through the two heating plates.

Furthermore, the turntable comprises a bottom plate, a fluted disc and a motor, the fluted disc is rotatably arranged on the bottom plate, the motor is used for driving the fluted disc to rotate, and the rack is mounted on the fluted disc and rotates together with the fluted disc;

the fluted disc is annular, the through-hole has been seted up to the corresponding fluted disc position department of bottom plate.

The invention has the following beneficial effects:

according to the invention, the turntable drives the rack to rotate, so that the herringbone plate and the clamping roller can continuously rotate around the central shaft of the blow molding head, the twisted angle of the film bubble is greatly increased under the combined action of the herringbone plate and the clamping roller, the texture of the finished film is finally more uniform, the texture of the film can be changed, and the quality of the film is further improved.

Drawings

In the drawings:

FIG. 1 is a schematic flow diagram of a thin film production process according to the present invention;

FIG. 2 is a perspective view of a film production apparatus according to the present invention;

FIG. 3 is a front view of FIG. 2;

fig. 4 is a view showing the structure of the spraying device according to the present invention.

Description of reference numerals:

1-a rack, 11-a winding roller, 12-a baking device, 121-a heating plate, 2-a plate body, 21-a first rod body, 22-a second rod body, 3-a clamping roller, 4-a rotating disc, 41-a bottom plate, 42-a fluted disc, 43-a motor, 44-a gear, 5-a first pushing component, 51-a first fixed block, 52-a first screw rod, 53-a moving block, 6-a second pushing component, 61-a threaded sleeve, 62-a second screw rod, 63-a second fixed block, 64-a rotating drum, 7-a spraying device, 71-a support, 711-a spraying head, 72-a support rod, 73-a third fixed block, 74-a third screw rod, 8-a film and 9-a blow molding head.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, and it should be understood that the described examples are only a part of the examples of the invention, and not all of the examples. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the invention.

See fig. 1-4.

A film production process uses a film 8 production device, the device comprises a rack 1 positioned below a blow head 9, a herringbone plate arranged on the rack 1, a clamping roller 3 arranged on the rack 1 and positioned at the lower end of the herringbone plate, a winding roller 11 arranged on the rack 1 and a turntable 4 positioned at the bottom of the rack 1, and the film 8 production process by adopting the film 8 production device is as follows:

s1, a rotation process: starting the turntable 4 to drive the rack 1 to rotate around the central shaft of the blow molding head 9, and enabling the equipment on the rack 1 to rotate together with the rack 1;

s2, extrusion process: the film bubble from the blow molding head 9 goes downward and passes through the herringbone plate with a large opening at the upper part and a small opening at the lower part, the position of the herringbone plate relative to the blow molding head 9 is continuously changed under the driving of the rotation of the rack 1, and meanwhile, the film bubble is continuously extruded;

s3, winding: the film bubble penetrating out of the herringbone plate reaches the clamping roller 3, is clamped and flattened by the clamping roller 3 to form a double-layer thin film 8, and finally reaches the winding roller 11 and is wound by the winding roller 11.

In specific implementation, the film bubble from the blow head 9 goes downward, is extruded by the herringbone plate, is gradually flattened, then passes through the nip roller 3 at the bottom of the herringbone plate, is flattened into a double-layer film 8, and then is wound by the winding roller 11. Meanwhile, the turntable 4 drives the rack 1 to rotate around the central shaft of the blow molding head 9, and the rack 1 drives the herringbone plate to rotate while rotating. Because the film bubble above the pinch roll 3 below the blow molding head 9 does not rotate along with the frame 1, the upper opening of the herringbone plate is large, and the lower opening is small. Therefore, in the process that the film bubble continuously moves downwards, the herringbone plate continuously changes the extrusion position of the film bubble, so that the two sides of the film bubble which are close to each other due to extrusion are continuously changed. Meanwhile, the clamping roller 3 and the herringbone plate are driven by the rack 1 to rotate around the central shaft of the blow molding head 9 continuously, the twisted angle of the film bubble is greatly increased under the combined action of the herringbone plate and the clamping roller 3, and therefore the uneven part of the film 8 can be distributed on the film 8 more uniformly, the texture of the finished film 8 is finally more uniform, the texture of the film 8 can be changed, and the quality of the film 8 is further improved.

In one embodiment, the herringbone plate comprises two plate bodies 2, the distance between the two plate bodies 2 is gradually reduced from top to bottom, and the distance between the two plate bodies 2 is adjustable. By the design, the size of the opening of the herringbone plate can be adjusted according to local conditions according to actual use conditions, so that the herringbone plate can be suitable for films with various sizes, and the adaptability of the herringbone plate is improved.

Preferably, a first rod body 21 and a second rod body 22 are respectively arranged on two sides of the plate body 2, the first rod body 21 is positioned above the plate body 2, and the second rod body 22 is positioned below the plate body 2;

a first pushing part 5 is arranged at a position of the frame 1 corresponding to the first rod body 21 and used for pushing the first rod body 21 to drive the upper part of the plate body 2 to be close to and far away from the other plate body 2;

a second pushing member 6 is disposed at a position corresponding to the second rod 22 of the frame 1, and is used for pushing the second rod 22 to drive the lower portion of the plate body 2 to approach and leave the other plate body 2.

The first pushing component 5 includes two first fixing blocks 51 fixed to the frame 1, the two first fixing blocks 51 are spaced apart from each other, first screws 52 are rotatably disposed on the two first fixing blocks 51, a moving block 53 is disposed on the first screws 52, the moving block 53 is in threaded fit with the first screws 52, and one end of the first rod 21 is rotatably connected to the moving block 53.

The second urging member 6 includes:

a threaded sleeve 61, one end of which is rotatably connected with the second rod 22;

a second screw 62 having one end screw-fitted to the threaded sleeve 61 and the other end extending out of the threaded sleeve 61 and rotatably connected to a drum 64;

and the second fixed block 63 is fixed on the frame 1 and is rotatably connected with the rotary drum 64.

In one embodiment, the extrusion process is preceded by a spraying process for spraying a mist on the outer surface of the film bubble exiting the blowing head 9. Due to the design, the film is cooled by adopting a natural cooling or air cooling mode in the prior art, the cooling time is long, and the travelling distance of the film needs to be increased or the speed of a film bubble coming out of a blow molding head needs to be reduced so that the film has enough time to be cooled. And this application can accelerate the cooling rate of film through spraying water smoke to the surface of membrane bubble, and it is long when reducing the cooling of film, and then just can shorten the journey of advancing of film, simplifies equipment structure, improves the production speed of film simultaneously. Meanwhile, the film bubble moves downwards, and the blow molding head is arranged above the film bubble, so that the normal work of the blow molding head is not affected by the fact that liquid enters the blow molding head.

In one embodiment, the spraying process sprays water mist on the outer surface of the film bubble by a spraying device 7, and the spraying device 7 comprises:

two oppositely arranged brackets 71, wherein the brackets 71 are semicircular, and a plurality of spray nozzles 711 with spray nozzles facing the film bubble are arranged on the brackets 71;

the two sides of the bracket 71 are connected with the frame 1 through the supporting rods 72.

In the concrete implementation, the frame can drive the device that sprinkles and rotate when rotating, sprinkles the water smoke to the surface of membrane bubble from each angle, makes water smoke sprinkle more even, avoids some positions to lead to the cooling rate to slow down because of not being infected with water smoke for a long time, causes the tightness difference, influences the product quality of film.

In an embodiment, the supporting rod 72 is slidably disposed on the frame 1, the frame 1 is provided with a third fixing block 73 and a third screw 74 corresponding to the supporting rod 72 one by one, the third screw 74 is spirally engaged with the third fixing block 73, and one end of the third screw passes through the third fixing block 73 and is rotatably connected with the supporting rod 72. Design like this, can make branch drive support remove through rotating the third screw rod, adjust the distance between two supports to be applicable to the membrane bubble of various different diameters. The sliding structure between the support bar and the frame is common knowledge of those skilled in the art, and for example, the sliding structure between the T-shaped sliding groove and the T-shaped sliding block in the drawings can be used to realize the sliding connection between the support bar and the frame. Therefore, it is not described herein.

In an embodiment, after the extruding step and before the rolling step, a baking step is further included for baking the film 8 to accelerate the drying speed of the film 8.

Wherein, the film 8 is dried by a baking device 12, the baking device 12 is connected with the frame 1 and is positioned on the advancing path of the film 8 from the nip roller 3 to the winding roller 11, the baking device 12 is composed of two heating plates 121, and the film 8 passes through between the two heating plates 121.

In an embodiment, the turntable 4 includes a bottom plate 41, a toothed disc 42 rotatably disposed on the bottom plate 41, and a motor 43 disposed on the bottom plate 41 for driving the toothed disc 42 to rotate, the frame 1 is mounted on the toothed disc 42 to rotate along with the toothed disc 42, the toothed disc 42 is ring-shaped, and a through hole is formed at a position of the bottom plate 41 corresponding to the toothed disc 42. Teeth are arranged on the outer side of the fluted disc 42, a gear 44 meshed with the fluted disc 42 is arranged on a rotating shaft of the motor 43, and the motor 43 drives the fluted disc 42 to rotate through the gear 44 so as to rotate the rack 1.

Design like this, be the annular and seted up the through-hole on the bottom plate through making the fluted disc, sprinkle the water smoke at the membrane bubble surface by the spraying device like this, flow downwards along the surface of membrane bubble, finally get into the through-hole department of bottom plate, can set up the water-collecting tray in the through-hole department of bottom plate and collect the water that flows down from the surface of film and recycle, also can set up the inlet channel in the below of through-hole, cause water outside the equipment.

Preferably, a bearing is disposed between the bottom plate 41 and the toothed plate 42, and the toothed plate 42 rotates relative to the bottom plate 41 through the bearing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a film production technology, its characterized in that has used a film (8) apparatus for producing, the device includes frame (1) that is located blowing head (9) below, the chevron board of setting on frame (1), set up on frame (1) and be located double-edged board lower extreme pinch roll (3), wind-up roll (11) of setting on frame (1) and be located carousel (4) of frame (1) bottom, adopt above-mentioned film (8) apparatus for producing to carry out the technology of film (8) as follows:

s1, rotation process: starting the turntable (4) to drive the rack (1) to rotate around the central shaft of the blow molding head (9), and enabling equipment on the rack (1) to rotate together with the rack (1);

s2, extrusion process: the film bubble from the blow molding head (9) moves downwards and passes through the herringbone plate with a large opening at the upper part and a small opening at the lower part, the position of the herringbone plate relative to the blow molding head (9) is continuously changed under the driving of the rotation of the rack (1), and meanwhile, the side part of the film bubble is continuously extruded;

s3, winding: the film bubble penetrating out of the herringbone plate reaches the clamping roller (3), is clamped and flattened by the clamping roller (3) to form a double-layer film (8), and finally reaches the winding roller (11) and is wound by the winding roller (11).

2. The process for producing a film (8) according to claim 1, wherein said herringbone plate comprises two plate bodies (2), the distance between said two plate bodies (2) decreases from top to bottom, and the distance between said two plate bodies (2) is adjustable.

3. A process for the production of a film (8) according to claim 1 or 2, wherein said extrusion step is preceded by a spraying step for spraying a water mist on the outer surface of the bubble emerging from the blowing head (9).

4. A process for the production of a film (8) according to claim 3, wherein said spraying step comprises spraying a mist on the outer surface of the bubble by means of a spraying device (7), said spraying device (7) comprising:

the film bubble spraying device comprises two opposite supports (71), wherein the supports (71) are semicircular, and a plurality of spraying nozzles (711) with spraying nozzles facing to a film bubble are arranged on each support (71);

two sides of the bracket (71) are connected with the frame (1) through a support rod (72).

5. The production process of the film (8) according to claim 4, wherein the supporting rods (72) are slidably arranged on the frame (1), the frame (1) is provided with third fixing blocks (73) and third screws (74) which correspond to the supporting rods (72) one by one, and one end of each third screw (74) penetrates through the third fixing block (73) and is rotatably connected with the supporting rod (72) while being in spiral fit with the third fixing block (73).

6. A process for producing a film (8) according to claim 1 or 2, wherein the extrusion step is followed by the winding step and further comprises a baking step for baking the film (8) to accelerate the drying of the film (8).

7. The film (8) production process according to claim 6, wherein the baking step is to dry the film (8) by a baking device (12), the baking device (12) is connected with the frame (1) and is positioned on a traveling path of the film (8) from the nip roller (3) to the take-up roller (11), the baking device (12) is composed of two heating plates (121), and the film (8) passes through between the two heating plates (121).

8. The film (8) production process according to claim 1 or 2, wherein the turntable (4) comprises a base plate (41), a toothed disc (42) and a motor (43), the toothed disc (42) is rotatably disposed on the base plate (41), the motor (43) is used for driving the toothed disc (42) to rotate, and the frame (1) is mounted on the toothed disc (42) and rotates together with the toothed disc (42);

the fluted disc (42) is annular, and a through hole is formed in the position, corresponding to the fluted disc (42), of the bottom plate (41).