A die head structure for uniform film blowing of film blowing machine

Abstract

The present invention belongs to the technical field of film blowing machine equipment, and in particular to a die head structure for uniform film blowing of a film blowing machine, the present invention comprises: a die base, a first die core and a second die core; a first die sleeve is connected to the periphery of the first die core, and a second die sleeve is connected to the periphery of the second die core; a feeding channel is provided between the first die core and the first die sleeve, and an annular die opening is provided between the second die sleeve and the second die core; a feeding port is provided on the die base, and a material channel connected to the feeding channel is provided on the feeding port; a film-lifting mechanism is provided at the inner periphery of the die opening; the film-lifting mechanism comprises an annular lifting seat, a lifting mechanism for driving the lifting seat to lift is fixedly installed on the die base, a ring track is connected to the periphery of the lifting seat, a rotating ring is rotatably connected to the ring track, and a plurality of rotatable reels are provided on the ring track for winding the film discharged from the die opening; the present invention can automatically pull the film out of the die opening evenly through the film-lifting mechanism, and the film-lifting efficiency is high and the effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of film blowing machine equipment, and in particular to a die head structure for uniform film blowing by a film blowing machine. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into thin films. There are many types of film blowing machines, including PE, POF, PVC, PVDC, etc. The new materials blown out with brand new particles are new materials with uniform color, clean, and good bag stretching. They are mainly composed of extruder, die, die head, cooling device, bubble stabilizing frame, herringbone plate, traction roller, winding device, etc. The film blowing die head is an important part of the film production equipment and directly affects the quality of the produced film. Most of the existing film blowing die heads are composed of a mold shell, a spiral body and a mold ring. The spiral body is placed in the mold shell, and the mold ring is sleeved on the spiral body. A spiral groove is opened on the side of the spiral body along its axial direction. The bottom of the spiral body is provided with a feed channel connected to the spiral groove. The melt enters the spiral groove from the feed channel and rises along the spiral groove to the discharge channel between the spiral body and the mold ring and is blown by the airway to form a film.

[0003] At present, the film blowing machine die head uses manual film pulling. The film coming out of the die mouth is manually pulled out, pulled upwards, and then handed over to the person above to pull the film away. Manual film pulling requires the cooperation of multiple people, and the manual strength is not well controlled, the film is constantly torn when the film is pulled, resulting in low film pulling efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a die head structure for uniform film blowing by a film blowing machine. By providing a film-lifting mechanism to wind the film on the surface of a reel, the film can be lifted and pulled out uniformly, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a die head structure for uniform film blowing by a film blowing machine proposed by the present invention comprises: a die base, a first die core and a second die core, the second die core is connected above the first die core; a first die sleeve is connected to the periphery of the first die core, and a second die sleeve is connected to the periphery of the second die core; a feeding channel is provided between the first die core and the first die sleeve, and an annular die opening is provided between the second die sleeve and the second die core, and the film is discharged from the die opening; a feeding port is provided on the die base, and a material channel connected to the feeding port is provided on the feeding port; a film pulling mechanism is provided on the inner periphery of the die opening, and the film pulling mechanism is used to pull out the film discharged from the die opening; the film pulling mechanism comprises an annular lifting seat, a lifting mechanism for driving the lifting seat to rise and fall is fixedly installed on the die base, an annular track is connected to the periphery of the lifting seat, a rotating ring is rotatably connected to the annular track, and a plurality of rotatable reels are provided on the annular track for winding the film discharged from the die opening.

[0006] As a preferred technical solution of the present invention, a gear ring is fixedly connected to the rotating ring, a micro motor is fixedly installed on the annular track, and a motor gear meshing with the gear ring is connected to the rotating shaft of the micro motor.

[0007] As a preferred technical solution of the present invention, a fixed seat corresponding to the reel is fixedly connected to the annular track, the reel is rotatably connected to the periphery of the fixed seat, and the inner wall of the reel is provided with a plurality of spiral guide grooves, the rotating ring is provided with a plurality of guide columns cooperating with the guide grooves, and the fixed seat is provided with an avoidance groove for avoiding the guide columns, and when the rotating ring rotates, multiple reels are driven to rotate simultaneously.

[0008] As a preferred technical solution of the present invention, the circumferential surface of the lifting seat is provided with an annular groove that cooperates with the reel, a gap is provided between the reel and the annular groove, and an introduction groove for introducing the film is provided on the annular groove, and a limiting groove is provided on the inner wall of the annular groove, and a limiting ring that cooperates with the limiting groove is provided on the surface of the reel.

[0009] As a preferred technical solution of the present invention, the lower surface of the lifting seat is evenly and fixedly connected with a plurality of connecting blocks along its circumference, and a plurality of C-shaped flip frames are rotatably connected to the connecting blocks for gathering and cutting the film; one end of the flip frame is rotatably connected to a rotating rod, an arc-shaped pressure plate is fixedly connected to the rotating rod, and a tension spring is fixedly connected between the rotating rod and the flip frame, and an arc-shaped cutter is fixedly connected to the end of the flip frame.

[0010] As a preferred technical solution of the present invention, an annular frame is slidably connected to the inner periphery of the lifting seat, a cylinder for driving the annular frame to be lifted and lowered is fixedly installed on the lifting seat, a rack corresponding to the flip frame is fixedly connected to the annular frame, a flip frame gear meshing with the rack is fixedly connected to the flip frame rotating shaft, and the annular frame can drive the flip frame to rotate when it is lifted and lowered.

[0011] As a preferred technical solution of the present invention, the die opening is in an inverted L shape, and a column cooperating with the turning frame is fixedly connected to the center of the die base.

[0012] As a preferred technical solution of the present invention, a die opening ring is connected inside the second die sleeve for adjusting the size of the die opening, and an adjusting bolt for driving the die opening ring to move is installed on the second die sleeve.

[0013] As a preferred technical solution of the present invention, a plurality of heating rings are installed on the outer wall of the first mold sleeve.

[0014] The beneficial effects of the present invention are:

[0015] 1. The film-lifting mechanism of the present invention is provided with a plurality of rollers. When the rotating ring rotates, the plurality of rollers can be driven to rotate simultaneously, and the film is wound on its surface. Then the lifting mechanism rises slowly. During the rising process, the rollers rotate slowly, and the film is evenly pulled out from the die. Compared with manual film lifting, the film-lifting mechanism has high film lifting efficiency and good effect.

[0016] 2. The present invention connects a plurality of turning frames under the circular track. After the film is pulled up, the turning frames rotate to gather the film on the surface of the column, and the cutting knife cuts the film, thereby automatically separating the film from the film-lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a schematic structural diagram of a die head structure for uniform film blowing in a film blowing machine.

[0018] Figure 2 The present invention provides a schematic cross-sectional view of a die head structure for uniform film blowing in a film blowing machine.

[0019] Figure 3 It is a structural schematic diagram of the film-lifting mechanism proposed in the present invention.

[0020] Figure 4 This is a schematic diagram from another angle of the film-lifting mechanism proposed by the present invention.

[0021] Figure 5 This is a schematic structural diagram of the lifting seat proposed by the present invention.

[0022] Figure 6 Schematic diagram of the circular track and reel proposed in the present invention.

[0023] Figure 7 This is a schematic structural diagram of the turning frame proposed by the present invention.

[0024] In the figure: 1, mold base; 2, first mold sleeve; 3, first mold core; 4, second mold sleeve; 5, second mold core; 6, film-lifting mechanism; 61, lifting seat; 611, annular groove; 612, introduction groove; 613, limit groove; 614, connecting block; 62, annular track; 621, gear ring; 622, rotating ring; 623, guide column; 63, reel; 631, limit ring; 632, guide groove; 633, fixed seat ; 64. Flip frame; 641. Flip frame gear; 642. Rotating rod; 643. Press plate; 644. Tension spring; 645. Cutter; 65. Micro motor; 66. Motor gear; 67. Cylinder; 68. Ring frame; 69. Rack; 7. Lifting mechanism; 8. Feed inlet; 9. Material channel; 10. Feed channel; 11. Die mouth; 12. Column; 13. Heating coil; 14. Adjusting bolt; 15. Die mouth ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment: This embodiment discloses a die head structure for uniform film blowing of a film blowing machine, such as Figure 1-Figure 7 As shown, it includes: a mold base 1, a first mold core 3 and a second mold core 5, the second mold core 5 is connected above the first mold core 3; the first mold core 3 is connected to the first mold sleeve 2 on the periphery, and the second mold core 5 is connected to the second mold sleeve 4 on the periphery; a feed channel 10 is provided between the first mold core 3 and the first mold sleeve 2, and an annular mold opening 11 is provided between the second mold sleeve 4 and the second mold core 5, and a film is discharged from the mold opening 11; a feed port 8 is provided on the mold base 1, and a material channel 9 connected to the feed channel 10 is provided on the feed port 8; the molten plastic enters the mold base 1 through the feed port 8, enters the feed channel 10 through the material channel 9, and finally is uniformly extruded in the form of a film through the mold opening 11, and also includes a film-pulling mechanism 6, which is arranged inside the mold opening 11, and the film-pulling mechanism 6 is used to pull out the film discharged from the mold opening 11.

[0027] Preferably, the die opening 11 is in an inverted L shape, one end of the die opening 11 for discharging materials is arranged on the inner wall of the second mold core 5 , and a column 12 cooperating with the turning frame 64 is fixedly connected to the center of the die base 1 .

[0028] Preferably, a die ring 15 is connected to the second die sleeve 4 for adjusting the size of the die opening 11, and an adjusting bolt 14 is installed on the second die sleeve 4 for driving the die ring 15 to move; the number of the adjusting bolts 14 is 8, and the discharge thickness of the film can be adjusted by adjusting the bolts 14.

[0029] Preferably, a plurality of heating coils 13 are installed on the outer wall of the first mold sleeve 2, and the heating coils 13 are arranged along the upper and lower layers of the first mold sleeve 2. The heating coils 13 ensure the stability of the molten plastic in the feeding channel 10 and ensure its fluidity.

[0030] like Figure 3-Figure 6As shown, the film-lifting mechanism 6 includes an annular lifting seat 61, and the lifting seat 61 is arranged inside the second mold core 5. A lifting mechanism 7 for driving the lifting seat 61 to lift is fixedly installed on the mold base 1. The lifting mechanism 7 adopts a cylinder. The lifting mechanism 7 can push the film-lifting mechanism 6 out of the second mold core 5. The outer periphery of the lifting seat 61 is connected to an annular track 62, and a rotating ring 622 is rotatably connected to the annular track 62. The diameter of the rotating ring 622 is the same as that of the annular track 62, and a plurality of rotatable reels 63 are provided on the annular track 62 for winding the film discharged from the die opening 11. The reel 63 is The surface is provided with an adhesive layer, and a layer is torn off each time it is used. After the film is discharged from the die opening 11, it adheres to the surface of the reel 63. When the reel 63 rotates, the film is slowly pulled out from the die opening 11, wherein the film is wound on the surface of the reel 63 from the top; a gear ring 621 is fixedly connected to the rotating ring 622, a micro motor 65 is fixedly installed on the annular track 62, and a motor gear 66 meshing with the gear ring 621 is connected to the rotating shaft of the micro motor 65; when the film is wound, the micro motor 65 and the motor gear 66 are wrapped inside, and the rotating ring 622 can be driven to rotate on the annular track 62 by the micro motor 65.

[0031] Among them, a fixed seat 633 corresponding to the reel 63 is fixedly connected to the annular track 62, and the reel 63 is rotatably connected to the outer periphery of the fixed seat 633, and the inner wall of the reel 63 is provided with a plurality of spiral guide grooves 632, and the rotating ring 622 is provided with a plurality of guide columns 623 cooperating with the guide grooves 632. When the guide columns 623 slide in the guide grooves 632, the reel 63 can be driven to rotate, and the next guide column 623 slides into the next guide groove 632 at the same time, thereby driving the reel 63 to rotate. An avoidance groove for avoiding the guide column 623 is provided on the fixed seat 633. When the rotating ring 622 rotates, it drives multiple reels 63 to rotate at the same time, thereby winding the film, so that the film can be wound around the film-lifting mechanism 6, and the film can be pulled out when the film-lifting mechanism 6 is raised or lowered.

[0032] like Figure 5-Figure 6 As shown, the circumferential surface of the lifting seat 61 is provided with an annular groove 611 which cooperates with the reel 63, and a gap is provided between the reel 63 and the annular groove 611, so that the film can be wound around the surface of the reel 63, and the lifting seat 61 can drive the annular track 62 and the reel 63 to rise and fall simultaneously when it is lifted and lowered, and an introduction groove 612 for introducing the film is provided on the annular groove 611, and a large gap is provided between the introduction groove 612 and the reel 63 to prevent the film from being blocked by the annular groove 611, and a limiting groove 613 is provided on the inner wall of the annular groove 611, and a limiting ring 631 which cooperates with the limiting groove 613 is provided on the surface of the reel 63, and a gap is provided between the limiting ring 631 and the limiting groove 613, and the position stability of the reel 63 is ensured by the setting of the limiting groove 613 and the limiting ring 631.

[0033] like Figure 3 and Figure 7 As shown, the lower surface of the lifting seat 61 is evenly fixedly connected with a plurality of connecting blocks 614 along its circumference, and a plurality of C-shaped turning frames 64 are rotatably connected to the connecting blocks 614 for gathering and cutting the film; a rotating rod 642 is rotatably connected to one end of the turning frame 64, and an arc-shaped pressure plate 643 is fixedly connected to the rotating rod 642, and a tension spring 644 is fixedly connected between the rotating rod 642 and the turning frame 64, and an arc-shaped cutter 645 is fixedly connected to the end of the turning frame 64; when the film lifting mechanism 6 pulls up the film, the turning frame 64 is rotated upward, and the turning frame 64 is turned over to the top of the reel 63, and the pressure plate 643 first contacts the film, gathers the film and presses it on the surface of the column 12, and as the turning frame 64 continues to rotate, the cutter 645 contacts the film, and the cutter 645 cuts the film, so that the film is separated from the film lifting mechanism 6.

[0034] Among them, a ring frame 68 that can move up and down is slidably connected to the inner periphery of the lifting seat 61, a cylinder 67 for driving the ring frame 68 to move up and down is fixedly installed on the lifting seat 61, a rack 69 corresponding to the flip frame 64 is fixedly connected to the ring frame 68, and a flip frame gear 641 meshing with the rack 69 is fixedly connected to the rotating shaft of the flip frame 64. The rotation of the flip frame gear 641 will drive the flip frame 64 to rotate, and the ring frame 68 can drive the flip frame 64 to rotate when it is lifted or lowered; the ring frame 68 is driven to descend by the cylinder 67, and when the ring frame 68 descends, it drives the rack 69 to descend, and the rack 69 drives the flip frame gear 641 to rotate, thereby driving the flip frame 64 to rotate.

[0035] The working principle of the film-lifting mechanism 6 is as follows: after the film is discharged from the die 11, the film adheres to the surface of the reel 63, and the rotating ring 622 is driven to rotate by the micro motor 65, thereby driving multiple reels 63 to rotate at the same time, and the film is slowly wound on the reel 63, and then the lifting mechanism 7 drives the film-lifting mechanism 6 to rise slowly. During the rising process, the reel 63 rotates slowly, and then the film is slowly pulled out until the pulled-out film is complete, and then the cylinder 67 drives the annular frame 68 to descend, and drives multiple flip frames to rotate upward, and the pressure plate 643 first contacts the film, gathers the film and presses it on the surface of the column 12, and as the flip frame 64 continues to rotate, the cutter 645 will contact the film, and the cutter 645 will cut the film, so that the film is separated from the film-lifting mechanism 6, and then the film is pulled away manually, and the film-lifting mechanism 6 descends to its original position, wherein the film on the surface of the film-lifting mechanism 6 needs to be cleaned before each use.

[0036] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A die head structure for uniform film blowing of a film blowing machine, characterized in that: include: A mold base (1), a first mold core (3) and a second mold core (5), wherein the second mold core (5) is connected above the first mold core (3); The first mold core (3) is peripherally connected to a first mold sleeve (2), and the second mold core (5) is peripherally connected to a second mold sleeve (4); A material delivery channel (10) is provided between the first mold core (3) and the first mold sleeve (2), and an annular mold opening (11) is provided between the second mold sleeve (4) and the second mold core (5), and the film is discharged from the mold opening (11); The mold base (1) is provided with a feed port (8), and the feed port (8) is provided with a material channel (9) which is connected to the material delivery channel (10); A film-pulling mechanism (6) is arranged inside the die opening (11), and is used to pull out the film discharged from the die opening (11); The film-forming mechanism (6) comprises an annular lifting seat (61), a lifting mechanism (7) for driving the lifting seat (61) to rise and fall is fixedly mounted on the die seat (1), an annular track (62) is connected to the periphery of the lifting seat (61), a rotating ring (622) is rotatably connected to the annular track (62), and a plurality of rotatable rollers (63) are provided on the annular track (62) for winding the film discharged from the die opening (11); The rotating ring (622) is fixedly connected to a gear ring (621), a micro motor (65) is fixedly mounted on the annular track (62), and a motor gear (66) meshing with the gear ring (621) is connected to the rotating shaft of the micro motor (65); A fixed seat (633) corresponding to each of the reels (63) is fixedly connected to the annular track (62); the reels (63) are rotatably connected to the periphery of the fixed seat (633); a plurality of spiral guide grooves (632) are provided on the inner wall of the reel (63); a plurality of guide posts (623) cooperating with the guide grooves (632) are provided on the rotating ring (622); an avoidance groove for avoiding the guide posts (623) is provided on the fixed seat (633); and when the rotating ring (622) rotates, the plurality of reels (63) are driven to rotate simultaneously.

2. A die head structure for uniform film blowing of a film blowing machine according to claim 1, characterized in that: The lifting seat (61) has an annular groove (611) on its circumferential surface that cooperates with the reel (63), a gap is provided between the reel (63) and the annular groove (611), an introduction groove (612) for introducing a film is provided on the annular groove (611), a limiting groove (613) is provided on the inner wall of the annular groove (611), and a limiting ring (631) that cooperates with the limiting groove (613) is provided on the surface of the reel (63).

3. A die head structure for uniform film blowing of a film blowing machine according to claim 2, characterized in that: The lower surface of the lifting seat (61) is evenly and fixedly connected with a plurality of connection blocks (614) along its circumference, and a plurality of C-shaped flip frames (64) are rotatably connected to the connection blocks (614) for gathering and cutting the film; one end of the flip frame (64) is rotatably connected to a rotating rod (642), an arc-shaped pressing plate (643) is fixedly connected to the rotating rod (642), a tension spring (644) is fixedly connected between the rotating rod (642) and the flip frame (64), and an arc-shaped cutter (645) is fixedly connected to the end of the flip frame (64).

4. A die head structure for uniform film blowing of a film blowing machine according to claim 3, characterized in that: The lifting seat (61) is slidably connected to an annular frame (68) on its inner periphery; a cylinder (67) for driving the annular frame (68) to be lifted and lowered is fixedly mounted on the lifting seat (61); a rack (69) corresponding to the flip frame (64) is fixedly connected to the annular frame (68); a flip frame gear (641) meshing with the rack (69) is fixedly connected to the rotating shaft of the flip frame (64); and the annular frame (68) can drive the flip frame (64) to rotate when it is lifted and lowered.

5. A die head structure for uniform film blowing of a film blowing machine according to claim 4, characterized in that: The die opening (11) is in an inverted L shape, and a column (12) cooperating with the turning frame (64) is fixedly connected to the center of the die base (1).

6. A die head structure for uniform film blowing of a film blowing machine according to claim 5, characterized in that: A die opening ring (15) is connected to the inside of the second die sleeve (4) and is used to adjust the size of the die opening (11). An adjusting bolt (14) is installed on the second die sleeve (4) and is used to drive the die opening ring (15) to move.

7. A die head structure for uniform film blowing of a film blowing machine according to claim 6, characterized in that: A plurality of heating rings (13) are installed on the outer wall of the first mold sleeve (2).

Images