Film blowing and transverse stretching production line

Abstract

The utility model relates to a film blowing and transverse stretching production line which comprises a film blowing machine and a winding machine, a transverse stretching device is arranged between the film blowing machine and the winding machine, and the transverse stretching device comprises a first transverse stretching conveying line and a second transverse stretching conveying line; the first transverse stretching conveying line and the second transverse stretching conveying line each comprise an annular conveying chain and a plurality of clamping units used for clamping or loosening a film. The multiple clamping units on each transverse stretching conveying line are annularly arranged and connected with the corresponding annular conveying chains, a thin film of the film blowing machine enters the transverse stretching device, the clamping units clamp the thin film, the thin film is transversely stretched in the process that the thin film moves to the winding machine along the film blowing machine, and when the thin film enters the winding machine, the clamping units clamp the thin film. And the clamping unit loosens the film. The transverse stretching device is arranged between the winding machine and the film blowing machine, after the film is transversely stretched, the physical performance of the film can be effectively improved, and the phenomenon that the produced film is prone to breakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing, in particular to a film blowing and transverse stretching production line. Background Art

[0002] Chinese Patent No. 202210542697.X discloses an integrated film blowing and online stretching production line, including an extruder for extruding a film, a mold, an air ring for cooling the film, an upward rotating traction device for stretching the film, a heating and stretching rotating device, and a winder for winding the film; the heating and stretching rotating device is arranged between the upward rotating traction device and the winder, and the heating and stretching rotating device includes a rotating outer shell, and a plurality of heating coils are arranged at intervals in an upper and lower manner on the rotating outer shell, and the heating coil array includes a plurality of heating elements arranged at intervals on the inner wall of the rotating outer shell.

[0003] The above-mentioned film blowing and online stretching requires setting two upper and lower traction and stretching devices to stretch the film vertically, which can prevent the thick parts of the film from becoming thicker and the thin parts from becoming thinner after winding. In order to improve the physical properties of the film, the applicant further improved the above-mentioned film blowing and transverse stretching production line. Utility Model Content

[0004] The utility model aims to provide a film blowing and transverse stretching production line. By arranging a transverse stretching device between a winder and a film blowing machine, the physical properties of the film can be effectively improved after the film is transversely stretched, thereby preventing the film from being easily broken after production.

[0005] A film blowing and transverse stretching production line designed for this purpose comprises a film blowing machine for producing a film and a winding machine for winding the film. A transverse stretching device for stretching a double-layer bubble film is arranged between the film blowing machine and the winding machine. The transverse stretching device comprises a first transverse stretching conveyor line and a second transverse stretching conveyor line arranged oppositely and spaced apart; one end of the first transverse stretching conveyor line and the second transverse stretching conveyor line are connected to the film blowing machine, and the other end of the first transverse stretching conveyor line and the second transverse stretching conveyor line are connected to the winding machine; the first transverse stretching conveyor line and the second transverse stretching conveyor line both comprise an annular conveying chain and a plurality of clamping units for clamping or releasing the film; the plurality of clamping units on each transverse stretching conveyor line are arranged in an annular shape and connected to the corresponding annular conveying chain, the film of the film blowing machine enters the transverse stretching device, the clamping unit clamps the film, when the clamping unit moves with the conveying chain, the film moves in the direction of the winding machine following the clamping unit, and the film is transversely stretched in the process of moving from the film blowing machine to the winding machine, and when the film enters the winding machine, the clamping unit releases the film.

[0006] After the tube film is cut, the transverse stretching device clamps the upper and lower films together and stretches them horizontally to achieve stretching of the double-layer bubble film.

[0007] The annular conveyor chain divides the first transverse stretching conveyor line and the second transverse stretching conveyor line into a preheating section, a stretching section, a shaping section, and a post-processing section in the direction of movement from the film blowing machine to the winder; the film enters the transverse stretching device and passes through the preheating section, the stretching section, the shaping section, and the post-processing section in sequence.

[0008] A heating device for heating the film is arranged above and / or below the preheating section and the stretching section, and the heating device comprises a plurality of heating elements arranged at intervals.

[0009] The film is cooled and shaped after being stretched, which is beneficial to improving the physical properties of the film, and the heating device is beneficial to uniform thickness of the film.

[0010] The heating power of each heating element is adjusted to adjust the heating temperature released by each heating element; the heating temperature of the heating element in the preheating section is lower than the heating temperature in the stretching section.

[0011] The heating temperature of the heating element in the preheating section does not need to be set too high, and the heating temperature of the heating element gradually increases in the direction of the film toward the winder, which is beneficial to gradually improve the physical properties of the film and uniform the thickness of the film.

[0012] A cooling device for cooling and shaping the film is provided above and / or below the shaping section and the post-processing section.

[0013] Each annular conveyor chain is provided with a driven gear and a driving gear, the driving gear is connected to the motor shaft of the motor, the driving gear and the driven gear are meshed and driven in the annular conveyor chain, when the motor shaft of the motor drives the driving gear to rotate, the driven gear drives the driven gear ring to rotate through the annular conveyor chain, and the annular conveyor chain drives several clamping units to circulate on the corresponding transverse stretching conveyor line.

[0014] A first traction device is provided at the connection between the film blowing machine and the transverse stretching device, and the film of the film blowing machine enters the feed end of the transverse stretching device along the first traction device.

[0015] A second traction device is provided at the connection between the winder and the transverse stretching device, and the film on the discharge end of the transverse stretching device enters the winder along the second traction device for winding.

[0016] The film blowing machine includes a plurality of extruders which are circumferentially arranged on the outer peripheral side of the extrusion die, an air ring is arranged above the extrusion die, and a bubble stabilizing frame is arranged above the air ring; the film blowing machine also includes an upper rotating traction device, and a herringbone splint is arranged between the bubble stabilizing frame and the upper rotating traction device. After the extruder plasticizes the plastic particles, the plastic particles enter the extrusion die through a screen changer and an adapter, and the film bubbles formed from the extrusion die are cooled and inflated in the air ring to form a film, and the film passes through the bubble stabilizing frame, the herringbone splint, and the upper rotating traction device in turn, and the film upper rotating traction device enters the transverse stretching device.

[0017] A thickness measuring device for measuring the thickness of the film is arranged on the bubble stabilizing frame.

[0018] The utility model has the following beneficial effects:

[0019] By providing a transverse stretching device between the winder and the film blowing machine, the physical properties of the film can be effectively improved after the film is transversely stretched, thereby preventing the film from being easily broken after production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the planar structure of a film blowing and transverse stretching production line according to one embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the planar structure of another aspect of a film blowing and transverse stretching production line according to an embodiment of the utility model.

[0022] Figure 3 It is a schematic diagram of the planar structure of a transverse stretching device according to one embodiment of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-Figure 3A film blowing and transverse stretching production line includes a film blowing machine 1 for producing a film 3, and a winder 2 for winding the film 3. A transverse stretching device 4 for stretching a double-layer bubble film is arranged between the film blowing machine 1 and the winder 2. The transverse stretching device 4 includes two first transverse stretching conveyor lines 5 and a second transverse stretching conveyor line 6 that are arranged oppositely and spaced apart; one end of the first transverse stretching conveyor line 5 and the second transverse stretching conveyor line 6 is connected to the film blowing machine 1, and the other end of the first transverse stretching conveyor line 5 and the second transverse stretching conveyor line 6 is connected to the winder 2; the first transverse stretching conveyor line 5, The second transverse stretching conveyor lines 6 include an annular conveyor chain and a plurality of clamping units for clamping or releasing the film 3; the plurality of clamping units on each transverse stretching conveyor line are arranged in a ring shape and connected to the corresponding annular conveyor chain, the film 3 of the film blowing machine 1 enters the transverse stretching device 4, the clamping unit clamps the film 3, and when the clamping unit moves with the conveyor chain, the film 3 moves toward the direction of the winder 2 following the clamping unit, and the film 3 is transversely stretched in the process of moving from the film blowing machine 1 to the winder 2, and when the film 3 enters the winder 2, the clamping unit releases the film 3.

[0025] In this embodiment, the clamping unit of the transverse stretching device 4 is a structure well known to those skilled in the art, such as a film transverse stretching device disclosed in Chinese Patent No. ZL201520912743.6, and the specific structure will not be described in detail here.

[0026] The annular conveyor chain divides the first transverse stretching conveyor line 5 and the second transverse stretching conveyor line 6 into a preheating section 7, a stretching section 8, a shaping section 9, and a post-processing section 10 in the direction of movement from the film blowing machine 1 to the winder 2; the film 3 enters the transverse stretching device 4 and passes through the preheating section 7, the stretching section 8, the shaping section 9, and the post-processing section 10 in sequence.

[0027] A heating device for heating the film 3 is provided above and / or below the preheating section 7 and the stretching section 8, and the heating device includes a plurality of heating elements arranged at intervals.

[0028] In the preheating end 7, the interval between the first transverse stretching conveyor line 5 and the second transverse stretching conveyor line 6 is gradually set, and the interval between the first transverse stretching conveyor line 5 and the second transverse stretching conveyor line 6 gradually increases from the preheating section 7 to the stretching section 8.

[0029] In this embodiment, the heating element may be an electromagnetic coil, a ceramic heating element or a heating tube.

[0030] The heating power of each heating element is adjusted to adjust the heating temperature released by each heating element; the heating temperature of the heating element in the preheating section 7 is lower than the heating temperature of the stretching section 8.

[0031] A cooling device for cooling and shaping the film 3 is provided above and / or below the shaping section 9 and the post-processing section 10 .

[0032] In this embodiment, the cooling device is a cooling fan.

[0033] Each annular conveyor chain is provided with a driven gear and a driving gear, the driving gear is connected to the motor shaft of the motor, the driving gear and the driven gear are meshed and driven in the annular conveyor chain, when the motor shaft of the motor drives the driving gear to rotate, the driven gear drives the driven gear ring to rotate through the annular conveyor chain, and the annular conveyor chain drives several clamping units to circulate on the corresponding transverse stretching conveyor line.

[0034] A first traction device 11 is provided at the connection between the film blowing machine 1 and the transverse stretching device 4 , and the film 3 of the film blowing machine 1 enters the feeding end of the transverse stretching device 4 along the first traction device 11 .

[0035] A second traction device 12 is provided at the connection between the winder 2 and the transverse stretching device 4 , and the film 3 on the discharge end of the transverse stretching device 4 enters the winder 2 along the second traction device 12 for winding.

[0036] The film blowing machine 1 includes a plurality of extruders 14 circumferentially arranged on the outer peripheral side of an extrusion die 13, an air ring 15 is arranged above the extrusion die 13, and a bubble stabilizing frame 16 is arranged above the air ring 15; the film blowing machine 1 also includes an upper rotating traction device 17, and a herringbone splint 18 is arranged between the bubble stabilizing frame 16 and the upper rotating traction device 17. After the extruder 14 plasticizes the plastic particles, the plastic particles enter the extrusion die 13 through a screen changer and an adapter, and the film bubbles formed from the extrusion die 13 are cooled and inflated in the air ring 15 to form a film 3. The film 3 passes through the bubble stabilizing frame 16, the herringbone splint 18, and the upper rotating traction device 17 in sequence, and the film 3 enters the transverse stretching device 4 along the upper rotating traction device 17.

[0037] A thickness measuring device 19 for measuring the thickness of the film 3 is provided on the bubble stabilizing frame 16 .

[0038] In this embodiment, the specific structure of the film blowing machine 1 has been disclosed in Chinese Patent No. ZL202210462662.5 and will not be described in detail here.

[0039] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A film blowing and transverse stretching production line, comprising a film blowing machine (1) for producing a film (3), and a winder (2) for winding the film (3), characterized in that: A transverse stretching device (4) for stretching a double-layer bubble film is provided between the film blowing machine (1) and the winding machine (2). The transverse stretching device (4) comprises two first transverse stretching conveyor lines (5) and a second transverse stretching conveyor line (6) which are arranged opposite to each other and spaced apart from each other. One end of the first transverse stretching conveyor line (5) and the second transverse stretching conveyor line (6) is connected to the film blowing machine (1), and the other end of the first transverse stretching conveyor line (5) and the second transverse stretching conveyor line (6) is connected to the winding machine (2). The first transverse stretching conveyor line (5) and the second transverse stretching conveyor line (6) both comprise an annular conveying chain, a plurality of A clamping unit for clamping or releasing the film (3); a plurality of clamping units on each transverse stretching conveyor line are arranged in a ring shape and connected to a corresponding ring-shaped conveyor chain; the film (3) of the film blowing machine (1) enters the transverse stretching device (4), and the clamping unit clamps the film (3); when the clamping unit moves with the conveyor chain, the film (3) moves along the clamping unit in the direction of the winder (2), and the film (3) is stretched transversely in the process of moving from the film blowing machine (1) to the winder (2); when the film (3) enters the winder (2), the clamping unit releases the film (3).

2. The film blowing and transverse stretching production line according to claim 1, characterized in that: The ring-shaped conveyor chain divides the first transverse stretching conveyor line (5) and the second transverse stretching conveyor line (6) into a preheating section (7), a stretching section (8), a shaping section (9), and a post-processing section (10) in the direction of movement from the film blowing machine (1) to the winder (2); the film (3) enters the transverse stretching device (4) and passes through the preheating section (7), the stretching section (8), the shaping section (9), and the post-processing section (10) in sequence.

3. The film blowing and transverse stretching production line according to claim 2, characterized in that: A heating device for heating the film (3) is provided above and / or below the preheating section (7) and the stretching section (8), and the heating device includes a plurality of heating elements arranged at intervals.

4. The film blowing and transverse stretching production line according to claim 3, characterized in that: The heating power of each heating element is adjusted to adjust the heating temperature released by each heating element; the heating temperature of the heating element in the preheating section (7) is lower than the heating temperature of the stretching section (8).

5. The film blowing and transverse stretching production line according to claim 2, characterized in that: A cooling device for cooling and shaping the film (3) is provided above and / or below the shaping section (9) and the post-processing section (10).

6. The film blowing and transverse stretching production line according to claim 1, characterized in that: Each annular conveyor chain is provided with a driven gear and a driving gear, the driving gear is connected to the motor shaft of the motor, the driving gear and the driven gear are meshed and driven in the annular conveyor chain, when the motor shaft of the motor drives the driving gear to rotate, the driven gear drives the driven gear ring to rotate through the annular conveyor chain, and the annular conveyor chain drives several clamping units to circulate on the corresponding transverse stretching conveyor line.

7. The film blowing and transverse stretching production line according to claim 1, characterized in that: A first traction device (11) is provided at the connection between the film blowing machine (1) and the transverse stretching device (4), and the film (3) of the film blowing machine (1) enters the feed end of the transverse stretching device (4) along the first traction device (11).

8. The film blowing and transverse stretching production line according to claim 1, characterized in that: A second traction device (12) is provided at the connection between the winder (2) and the transverse stretching device (4), and the film (3) at the discharge end of the transverse stretching device (4) enters the winder (2) along the second traction device (12) for winding.

9. The film blowing and transverse stretching production line according to claim 1, characterized in that: The film blowing machine (1) comprises a plurality of extruders (14) circumferentially arranged on the outer peripheral side of an extrusion die (13); an air ring (15) is arranged above the extrusion die (13); and a bubble stabilizing frame (16) is arranged above the air ring (15); the film blowing machine (1) also comprises an upper rotation traction device (17); a herringbone splint (18) is arranged between the bubble stabilizing frame (16) and the upper rotation traction device (17); after the extruder (14) plasticizes the plastic particles, the plastic particles enter the extrusion die (13) through a screen changer and an adapter; the film bubbles formed from the extrusion die (13) are cooled and inflated by the air ring (15) to form a film (3); the film (3) passes through the bubble stabilizing frame (16), the herringbone splint (18), and the upper rotation traction device (17) in sequence; and the film (3) enters the transverse stretching device (4) along the upper rotation traction device (17).

10. The film blowing and transverse stretching production line according to claim 9, characterized in that: A thickness measuring device (19) for measuring the thickness of the film (3) is provided on the bubble stabilizing frame (16).

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