CN115303530A

CN115303530A - Film feeding traction mechanism and plastic bag packaging machine using same

Info

Publication number: CN115303530A
Application number: CN202211251995.XA
Authority: CN
Inventors: 陆海华; 张立; 陈树冬
Original assignee: Boshile Automation Technology Kunshan Co ltd
Current assignee: Boshile Automation Technology Kunshan Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2022-11-08

Abstract

The application discloses a film feeding traction mechanism and a plastic bag packaging machine applying the same, and relates to the field of packaging equipment; a film feeding traction mechanism comprises a support and a rotating roller, wherein the rotating roller is used for sleeving a winding roller of a film, is rotatably connected with the support, and is provided with a fixing assembly used for fixing the winding roller; the support is rotatably provided with a mounting rack, and the axial direction of a rotating shaft of the mounting rack is arranged along the axial direction of the rotating roller; the mounting rack is rotatably provided with an abutting roller which is used for keeping abutting against the outermost film on the winding roller, and the abutting roller is positioned above the rotating roller; the mounting bracket is provided with a driving motor for driving the abutting roller to rotate. The butt roller can drive the winding roller to rotate so as to unwind the film, so that the traction force applied to the film can be reduced, and the risk of deformation or damage of the film can be reduced.

Description

Film feeding traction mechanism and plastic bag packaging machine using same

Technical Field

The application relates to the field of packaging equipment, in particular to a film feeding traction mechanism and a plastic bag packaging machine using the same.

Background

When a product is packaged, a packaging bag is sometimes used for packaging the product. A packaging bag for packaging a product is generally formed by packaging a film wound around a winding roll by a special packaging machine; when the packaging bags are formed, the corresponding products can be automatically packaged in the corresponding packaging bags.

The traditional Chinese patent with the publication number of CN216332970U discloses an automatic liquid packaging machine, which comprises a frame, wherein a feeding roller is rotationally arranged on the frame and used for mounting a packaging film roll; the frame is rotatably provided with a driven roller and a driving roller which are parallel to each other to clamp the packaging film; the driving rotating roller is connected with a first driving motor to drive the driving rotating roller to rotate, so that the packaging film is pulled to be unreeled from the feeding roller; a material guide hopper, a sealing device and a second traction device are sequentially arranged at the position, below the driving roller, of the frame downwards; the material guide hopper is provided with a material guide surface, and the lower end of the material guide surface is provided with a material guide end; the frame is provided with a material guide pipe extending into the material guide hopper. When the packaging film is used, the packaging film which penetrates through the space between the driving rotating roller and the driven rotating roller sequentially penetrates through the material guiding end and the edge sewing device downwards along the material guiding lower surface and extends to the position of the second traction device; the material guiding end can fold the packaging film in half, and the folded packaging film is sealed into a packaging bag body with an opening at the upper end by the edge sewing device; then, the materials to be packaged are conveyed into the packaging bag body through the material guide pipe, and meanwhile, the packaging bag body is driven to move downwards by the second traction device; when the packaging device acts again, the upper end of the packaging bag body positioned below the edge sewing device is sealed and sealed so as to package the materials in the packaging bag.

In view of the above-mentioned related art, the inventor believes that, during the conveying process of the packaging film to the guide hopper, the packaging film between the driving roller and the feeding roller is under tension, which may cause the packaging film to deform or damage, thereby affecting the packaging quality, and thus needs to be improved.

Disclosure of Invention

The application aims to provide a film feeding traction mechanism and a plastic bag packaging machine using the same, so as to solve the problem that a film for forming a packaging bag is easy to deform or damage.

In a first aspect, the present application provides a film feeding traction mechanism that adopts the following technical scheme:

a film feeding traction mechanism comprises a support and a rotating roller, wherein the rotating roller is used for sleeving a winding roller of a film, is rotatably connected with the support, and is provided with a fixing assembly used for fixing the winding roller; the support is rotatably provided with a mounting rack, and the axial direction of a rotating shaft of the mounting rack is arranged along the axial direction of the rotating roller; the mounting rack is rotatably provided with an abutting roller which is used for keeping abutting with the film on the outermost layer on the winding roller, and the abutting roller is positioned above the rotating roller; the mounting bracket is provided with a driving motor for driving the abutting roller to rotate.

Through adopting above-mentioned technical scheme, driving motor can drive the butt roller and rotate to make the live-rollers drive around winding up roller and live-rollers rotation, in order unreeling the film, move to subsequent station for the film. The abutting roller is abutted with the outermost film on the winding roller to drive the winding roller to rotate and unwind the film, so that the traction force applied to the film is favorably reduced, and the risk of deformation or damage of the film is favorably reduced; further, when the unwinding speed of the film is the same as the traction speed of the film by the traction device on the subsequent station, the traction force applied to the film between the winding roller and the corresponding traction device can be further reduced.

Optionally, the fixing assembly includes an installation ring plate connected to the rotating roller, a driving member connected to the installation ring plate, and a plurality of abutting rods for abutting against an inner side wall of the winding roller, and all of the abutting rods are sequentially arranged along a circumferential direction of the rotating roller; the abutting rod is connected with the mounting ring plate in a sliding manner along the radial direction of the rotating roller; the driving piece is used for driving the abutting rod to slide in a reciprocating mode.

By adopting the technical scheme, when the winding roller is installed, the winding roller is sleeved on the rotating roller, and the abutting rod is positioned inside the winding roller; then, the driving piece drives the abutting rod to move towards the direction departing from the rotating roller; when the abutting rod abuts against the inner side wall of the winding roller, the winding roller and the abutting rod are kept relatively fixed, so that the winding roller is fixed with the rotating roller, and the winding roller rotates relative to the support. When the winding roller is installed, the end wall of the installation ring plate can be abutted against the end wall of the corresponding end of the winding roller, so that the effect of positioning the winding roller is achieved.

Optionally, the driving member includes a plurality of driving screws rotatably connected to the mounting ring plate, a driving bevel gear rotatably connected to the mounting ring plate, and a plurality of transmission bevel gears engaged with the driving bevel gear; the transmission bevel gears correspond to the driving screw rods one by one, and the driving screw rods correspond to the abutting rods one by one; the transmission bevel gears are connected with corresponding driving screw rods, and the driving screw rods are in threaded connection with corresponding abutting rods.

Through adopting above-mentioned technical scheme, rotate drive bevel gear, transmission bevel gear drives the drive screw and rotates to the drive meets the pole and removes, simple structure, simple operation.

Optionally, the driving bevel gear is connected with a fixing rod in a sliding manner, and the mounting ring plate is provided with a fixing hole for inserting one end of the fixing rod; the fixed rod is connected with an elastic connecting piece for driving the fixed rod to move towards the direction of the fixed hole; when the abutting rod abuts against the inner side wall of the winding roller, the fixing rod is aligned with the fixing hole.

Through adopting above-mentioned technical scheme, the dead lever cooperates with the fixed orifices grafting to the rotation of restriction drive bevel gear, thereby reduce the butt pole and take place the possibility that breaks away from around the winding up roller, thereby improve the stability that the butt pole supports the inside wall tightly around the winding up roller.

Optionally, the mounting ring plate is provided with a mounting sleeve sleeved on the outer peripheral wall of the rotating roller, and the mounting sleeve is in threaded connection with an abutting screw abutted against the outer peripheral wall of the rotating roller.

Through adopting above-mentioned technical scheme, the periphery wall of live-rollers is located to the installation sleeve cover, can follow the axial of live-rollers and adjust the position of installation crown plate to the position of adjustment winding roller, thereby improve the suitability to the film of different width. After the position adjustment of the mounting ring plate is completed, the abutting screws are rotated and can abut against the peripheral wall of the rotating roller, so that the mounting ring plate and the rotating roller are kept relatively fixed, and the operation is simple and convenient.

In a second aspect, the plastic bag packaging machine using the film feeding traction mechanism provided by the application adopts the following technical scheme:

a plastic bag packaging machine applying a film feeding traction mechanism comprises a rack and the film feeding traction mechanism, wherein a support is connected with the rack; the machine frame is provided with a packaging bag forming hopper and a conveying pipe inserted in the packaging bag forming hopper; the frame is provided with a back sealing component and a traction component, wherein the back sealing component is used for sealing and connecting two sides of the film to form a packaging bag, and the traction component is used for driving the packaging bag to move downwards; the frame is provided with a horizontal sealing device for sealing the lower end of the packaging bag.

By adopting the technical scheme, when in use, the thin film output by the film feeding traction mechanism is downwards penetrated to the position of the traction assembly from the position between the packaging bag forming hopper and the material conveying pipe; in the process of drawing the film by the drawing device, two sides of the film can automatically move close to each other along the inner side wall of the packaging bag forming hopper and form a cylindrical packaging bag structure wrapped on the outer peripheral wall of the conveying pipe; the back sealing assembly is used for sealing and connecting two sides of the film, the transverse sealing device is used for sealing the lower end of the packaging bag, and at the moment, the material to be packaged is conveyed into the packaging bag through the conveying pipe; the packaging bag containing the materials can continuously move downwards; when the transverse sealing device acts again and seals the packaging bag, the upper end of the packaging bag containing the materials is automatically sealed, so that the materials are sealed in the packaging bag. The abutting roller is matched with the traction device, so that the traction force applied to the film in the conveying process can be reduced, and the possibility of deformation or damage of the film is reduced.

Optionally, the transverse sealing device includes a fixed template connected to the frame, a sliding plate slidably connected to the frame along a thickness direction of the fixed template, a sliding template connected to the sliding plate, and a sliding assembly for driving the sliding plate to slide; the fixed template and the sliding template can both heat the film of the packaging bag; the sliding template can be abutted against the fixed template so as to clamp the packaging bag.

By adopting the technical scheme, the packaging bag subjected to back sealing can move downwards to the position between the fixed template and the sliding template, at the moment, the sliding assembly drives the sliding plate to move towards the fixed template so as to drive the sliding template to move towards the fixed template, so that the sliding template is tightly abutted against the fixed template, and the packaging bag is clamped; meanwhile, the film of the packing bag is heated by the fixed template or/and the sliding template so as to enable the films at the two sides of the packing bag to be adhered to each other, thereby sealing the upper end of the packing bag.

Optionally, the sliding assembly includes a connecting rod connected to the sliding plate, a driving cam rotatably connected to the frame, a rotating member for driving the driving cam to rotate, a driving rod for abutting against a peripheral wall of the driving cam, and an elastic member for keeping the driving rod abutting against the driving cam; the driving rod is connected with the connecting rod; one end of the elastic piece is connected with the rack, and the other end of the elastic piece is connected with the driving rod.

Through adopting above-mentioned technical scheme, rotate a drive cam and rotate to the drive actuating lever removes, thereby drives connecting rod and sliding plate and removes. The elastic piece is mutually matched with the driving cam, the structure is simple, and the operation is stable.

Optionally, a transmission sleeve is arranged between the driving rod and the driving cam, and the transmission sleeve is rotatably connected with the driving rod around the axis of the transmission sleeve; the peripheral wall of the transmission sleeve is abutted against the peripheral wall of the driving cam.

Through adopting above-mentioned technical scheme, the actuating lever passes through the perisporium butt of transmission sleeve pipe with the drive cam, is favorable to reducing the frictional force between actuating lever and the drive cam to be favorable to reducing the size of actuating lever to the pivoted resistance of drive cam, so that the rotation of drive cam.

Optionally, the sliding template is connected with the sliding plate in a sliding manner along the sliding direction of the sliding plate, and the sliding template is connected with an elastic abutting part for driving the sliding template to move towards the fixed template; the side wall of the sliding template facing the direction of the fixed template is provided with a yielding hole in a penetrating manner along the sliding direction of the sliding template, a cutter is arranged in the yielding hole, and the cutter is connected with the sliding plate; the cutting edge of cutter can with the fixed die plate butt to cut the wrapping bag.

By adopting the technical scheme, when the sliding plate moves towards the fixed template, after the film of the packaging bag is tightly abutted by the sliding template and the packaging bag is sealed, the sliding plate continues to move towards the fixed plate; at the moment, the elastic piece is elastically deformed, and the movable sliding template moves relative to the sliding plate so as to enable the cutter to move towards the outside of the abdicating hole; when the cutting edge of the cutter is abutted to the fixed template, the cutter automatically cuts the sealed packaging bag down, so that the packaging bag is automatically cut.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the abutting roller can drive the winding roller to rotate and unwind the film, so that the traction force applied to the film is favorably reduced, and the risk of deformation or damage of the film is favorably reduced;

2. all the abutting rods can be driven to move by rotating the driving bevel gear so as to enable the abutting rods to abut against the inner side wall of the winding roller, and therefore the winding roller is fixed, the structure is simple, and the operation is convenient and fast;

3. when the sliding plate moves towards the fixed template, the sliding template is matched with the fixed template, the opening of the packaging bag can be sealed, meanwhile, the sealed packaging bag can be automatically cut off by the cutter, and the structure is simple and compact.

Drawings

Fig. 1 is a schematic view of the overall structure of a plastic bag packaging machine applying a film feeding traction mechanism according to an embodiment of the present application.

Fig. 2 is a schematic diagram for showing the structure of the film feeding and drawing mechanism.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view for showing the structure of the fixing member.

Fig. 5 is a schematic diagram for showing the structure of the back seal assembly.

Fig. 6 is a schematic cross-sectional view for showing the internal structure of the rack.

Fig. 7 is an exploded view for showing a connection structure between the slide mold plate and the slide plate.

In the figure, 1, a frame; 11. a film feeding guide roller; 12. a packaging bag forming hopper; 13. a hopper; 131. a delivery pipe; 14. a traction assembly; 141. a traction wheel; 142. a traction conveyor belt; 143. a traction motor; 15. a back seal assembly; 151. a connecting frame; 152. back sealing the mold rod; 153. a driving cylinder; 16. a guide hole; 2. a film feeding traction mechanism; 3. a support; 31. a placement groove; 32. installing a shaft; 321. a mounting frame; 3211. an abutment roller; 3212. a drive motor; 33. a film discharging guide roller; 4. a rotating roller; 5. a film; 51. a winding roller; 6. a fixing assembly; 61. installing a ring plate; 611. installing a sleeve; 6111. mounting a screw hole; 6112. an abutment screw; 612. a sliding groove; 613. a fixing hole; 62. a drive member; 621. a drive screw; 622. a drive bevel gear; 623. a drive bevel gear; 6231. mounting holes; 6232. a fixing rod; 6233. an elastic connecting member; 63. a butting rod; 7. a transverse sealing device; 71. fixing the template; 72. a sliding plate; 721. a slide hole; 7211. a slide bar; 7212. a limit ring plate; 73. sliding the template; 731. an elastic abutting member; 732. a hole for abdication; 733. a cutter; 74. a sliding assembly; 741. a connecting rod; 742. a drive cam; 7421. a connecting shaft; 7422. a remote section; 7423. an approach section; 7424. an abutting portion; 7425. a cutting section; 7426. a deviation part; 743. a rotating member; 744. a drive rod; 7441. a drive sleeve; 745. an elastic member.

Detailed Description

The present application is described in further detail below with reference to fig. 1-7.

A plastic bag packaging machine applying a film feeding traction mechanism refers to fig. 1 and 2 and comprises a rack 1, wherein a film feeding traction mechanism 2 is arranged on one side of the rack 1 along the length direction of the rack, the film feeding traction mechanism 2 comprises a support 3 and a rotating roller 4, and the axial direction of the rotating roller 4 is arranged along the width direction of the rack 1; the bracket 3 is fixedly connected with the frame 1 through screws. The positions of the bracket 3 at the two ends of the rotating roller 4 are both downwards provided with placing grooves 31; the winding roller 51 wound with the film 5 may be fitted around the circumferential wall of the rotating roller 4 from one end of the rotating roller 4, and then the rotating shaft of each end of the rotating roller 4 may be placed in the corresponding placing groove 31.

Referring to fig. 3 and 4, both ends of the rotating roller 4 are provided with fixing assemblies 6, and the fixing assemblies 6 include a mounting ring plate 61, a driving member 62, and a plurality of butting rods 63. The mounting ring plate 61 is coaxially sleeved on the rotating roller 4; a mounting sleeve 611 is welded and fixed to a side wall of the mounting ring plate 61 on the side away from the winding roller 51, and the mounting sleeve 611 is sleeved on the rotating roller 4. An installation screw hole 6111 is formed in the outer peripheral wall of the installation sleeve 611 in a penetrating mode along the radial direction of the installation sleeve 611, and an abutting screw 6112 is connected to the inner side wall of the installation screw hole 6111 in a threaded mode. The abutment screw 6112 is rotated, and the abutment screw 6112 can abut against the rotatable roller 4 to fix the mounting sleeve 611, thereby fixing the mounting ring plate 61.

Referring to fig. 3 and 4, the mounting ring plate 61 is provided with a sliding groove 612 along a radial direction thereof, and the sliding groove 612 penetrates along an axial direction of the mounting ring plate 61. A plurality of the sliding grooves 612 are sequentially arranged along the circumferential direction of the mounting ring plate 61; the number of the sliding grooves 612 is the same as that of the abutting rods 63, the sliding grooves 612 correspond to the abutting rods 63 one by one, and each abutting rod 63 is connected with the inner side wall of the corresponding sliding groove 612 in a sliding mode along the length direction of the sliding groove 612. One end of the abutting rod 63 near the winding roller 51 is interposed between the winding roller 51 and the rotating roller 4.

Referring to fig. 3 and 4, the driving member 62 includes a driving screw 621, a driving bevel gear 622, and a transmission bevel gear 623, the number of the driving screw 621 and the transmission bevel gear 623 being the same as the number of the abutment levers 63; the transmission bevel gears 623 correspond to the driving screws 621 one by one, and the driving screws 621 correspond to the abutting rods 63 one by one. The drive screw 621 is located on the side of the mounting ring plate 61 facing away from the winding roller 51; the axial direction of the driving screw 621 is arranged along the sliding direction of the corresponding abutting rod 63, and both ends of the driving screw 621 are rotatably connected with the mounting ring plate 61. The driving screw 621 penetrates the corresponding abutment rod 63 and is screwed with the corresponding abutment rod 63; the drive bevel gears 623 are welded to the corresponding drive screws 621.

Referring to fig. 3 and 4, the driving bevel gear 622 is coaxially and rotatably connected to the mounting ring plate 61 through a bearing, and the driving bevel gear 622 is engaged with all the transmission bevel gears 623 on the corresponding mounting ring plate 61. The driving bevel gear 622 is rotated to drive all the corresponding transmission bevel gears 623 and the driving screw 621 to rotate, so that all the corresponding abutting rods 63 synchronously move, and the abutting rods 63 abut against the inner side wall of the winding roller 51.

Referring to fig. 4, the driving bevel gear 622 penetrates through the mounting hole 6231 along the axial direction thereof, and the fixing rod 6232 is slidably connected to the inner side wall of the mounting hole 6231. One end of the fixed rod 6232 away from the mounting ring plate 61 is provided with an elastic connecting piece 6233; the resilient coupling 6233 comprises a spring. The elastic connecting piece 6233 is sleeved on the fixed rod 6232; one end of the elastic connecting member 6233 is welded to the fixing rod 6232, the other end is welded to the driving bevel gear 622, and the elastic member 745 is in a stretched state. A fixing hole 613 is formed in the side wall of the mounting ring plate 61 away from the direction of the winding roller 51; when the abutting rod 63 abuts against the inner side wall of the winding roller 51, the fixing rod 6232 is aligned with the fixing hole 613, and the elastic connecting member 6233 can drive the fixing rod 6232 to be automatically inserted into the fixing hole 613 so as to limit the rotation of the driving bevel gear 622, thereby improving the stability of the abutting rod 63 abutting against the winding roller 51.

Referring to fig. 2, the bracket 3 is welded and fixed with a mounting shaft 32, the mounting shaft 32 is provided in the axial direction of the rotating roller 4, and the mounting shaft 32 is located above the rotating roller 4. The mounting shaft 32 is sleeved with a mounting rack 321, and the mounting rack 321 can rotate around the axis of the mounting shaft 32. The mounting frame 321 is provided with an abutting roller 3211 and a driving motor 3212; the driving motor 3212 is fixedly connected with the mounting frame 321 through a bolt, and the abutting roller 3211 is connected with an output shaft of the driving motor 3212 through a flange. The abutment roller 3211 and the drive motor 3212 are both located directly above the rotating roller 4, and the peripheral wall of the abutment roller 3211 abuts against the outermost film 5 on the winding roller 51. When the driving motor 3212 drives the abutting roller 3211 to rotate, the abutting roller 3211 can drive the winding roller 51 to rotate, so as to unwind the film 5.

Referring to fig. 2, a plurality of film discharging guide rollers 33 are rotatably mounted at the position of the bracket 3 above the rotating roller 4, and a plurality of film feeding guide rollers 11 are rotatably mounted at the position of the frame 1 above the film discharging guide rollers 33; one end of the film 5 far from the winding roller 51 is wound around all the film outlet guide rollers 33 and all the film inlet guide rollers 11 in sequence.

Referring to fig. 1 and 5, a packaging bag forming hopper 12 and a hopper 13 are fixedly welded at the upper end of one side of the frame 1, which is far away from the film feeding traction mechanism 2, and the hopper 13 is positioned above the packaging bag forming hopper 12; the lower end of the hopper 13 is welded and fixed with a feed delivery pipe 131, and the lower end of the feed delivery pipe 131 extends downwards and is inserted into the packaging bag forming hopper 12 in a penetrating manner. A gap is arranged between the outer peripheral wall of the material conveying pipe 131 and the inner peripheral wall of the packaging bag forming hopper 12; the film 5 which bypasses the film inlet guide roller 11 can extend into the packaging bag forming hopper 12 along the inner side wall of the packaging bag forming hopper 12, and the film 5 can extend downwards to the outside of the lower end of the packaging bag forming hopper 12 from a gap between the material conveying pipe 131 and the packaging bag forming hopper 12; then, both sides of the film 5 can be simultaneously bent around the feed delivery pipe 131 and toward the side of the feed delivery pipe 131 away from the frame 1, so that the film 5 is in a cylindrical shape wrapping the feed delivery pipe 131.

Referring to fig. 5 and 6, the frame 1 is provided with drawing assemblies 14 at both sides of the feed delivery pipe 131, and the drawing assemblies 14 are located below the bag forming hopper 12. Traction assembly 14 includes a traction wheel 141, a traction belt 142, and a traction motor 143. Two traction wheels 141 are sequentially arranged along the vertical direction, and the two traction wheels 141 are rotatably connected with the frame 1; the traction belts 142 are wound around the outer peripheral walls of the two traction wheels 141, and the traction belts 142 are in contact with the film 5 wrapped around the outer peripheral wall of the feed pipe 131. The traction motor 143 is fixed to the inner sidewall of the frame 1 by a screw, and an output shaft of the traction motor 143 is connected to one of the traction wheels 141 to drive the corresponding traction wheel 141 to rotate, so as to drive the traction belt 142 to move, and drive the film 5 to move downward.

Referring to fig. 5 and 6, the frame 1 is provided with a back seal assembly 15, and the back seal assembly 15 is located at a position of a side of the feed conveyor pipe 131 facing away from the frame 1. The back sealing assembly 15 comprises a connecting frame 151, a back sealing mold rod 152 and a driving air cylinder 153. The connecting frame 151 is located below the packaging bag forming hopper 12, and two ends of the connecting frame 151 are welded and fixed with the rack 1. The back mold rod 152 is positioned on one side of the connecting frame 151 facing the conveying pipe 131; two back mold sealing rods 152 are sequentially arranged along the width direction of the frame 1. One of the back mold sealing rods 152 is fixed with the connecting frame 151 through a bolt; the other back mold bar 152 is slidably connected to the connection frame 151 along the width direction of the frame 1 by a guide bar. The cylinder body of the driving cylinder 153 is fixed with the connecting frame 151, and the piston rod of the driving cylinder 153 is connected with the back mold sealing rod 152 which is arranged in a sliding manner so as to drive the corresponding back mold sealing rod 152 to slide back and forth.

Referring to fig. 5, the back mold bars 152 are vertically arranged in the length direction, and both bent sides of the film 5 are located between the two back mold bars 152. An electric heating wire is installed in the back mold sealing rod 152. The electrical heating wires may heat the back mold bars 152 to heat the film 5 located between the two back mold bars 152. When the driving cylinder 153 drives the corresponding back mold bar 152 to move towards the other back mold bar 152, the two back mold bars 152 can clamp the heated film 5, so that the two sides of the film 5 are sealed and adhered to each other, and the film 5 is formed into a packaging bag.

Referring to fig. 6 and 7, the frame 1 is provided with a horizontal sealing device 7, and the horizontal sealing device 7 is located at a position below the feed conveyor pipe 131. The transverse sealing device 7 comprises a fixed template 71, a sliding plate 72, a sliding template 73 and a sliding assembly 74. The fixed template 71 is fixedly connected with the outer side wall of the frame 1 through bolts, and the side wall of one side of the fixed template 71 in the thickness direction is attached to the frame 1. The sliding plate 72 is positioned on the side of the fixed template 71 away from the frame 1; the sliding plate 72 is provided with a sliding hole 721 penetrating along the thickness direction of the fixed template 71, and the inner side wall of the sliding hole 721 is connected with a sliding rod 7211 in a sliding manner; the sliding template 73 and one end of the sliding rod 7211 close to the fixed template 71 are welded and fixed, one end of the sliding rod 7211 far away from the sliding template 73 is welded and fixed with a limit ring plate 7212, and the limit ring plate 7212 is positioned on one side of the sliding plate 72 far away from the sliding template 73.

Referring to fig. 7, the sliding template 73 is connected with an elastic abutment piece 731, and the elastic abutment piece 731 includes a spring. The elastic abutting part 731 is sleeved on the sliding rod 7211; one end of the elastic abutting piece 731 abuts against the sliding template 73, and the other end abuts against the sliding plate 72, so that the limit ring plate 7212 abuts against the sliding plate 72. The side wall of the slide die plate 73 facing the fixed die plate 71 is provided with a relief hole 732, and the relief hole 732 penetrates in the axial direction of the slide rod 7211. A cutting knife 733 is disposed in the sliding hole 721, the cutting knife 733 is fixed to the sliding plate 72 by a bolt, and a cutting edge of the cutting knife 733 is located on a side of the cutting knife 733 near the fixed die plate 71. When the sliding plate 73 moves toward the sliding plate 72, the blade of the cutting knife 733 moves to the outside of the escape hole 732.

Referring to fig. 6 and 7, the slide assembly 74 includes a connecting rod 741, a driving cam 742, a rotating member 743, a driving lever 744, and an elastic member 745; the driving cam 742, the rotating member 743, the driving lever 744, and the elastic member 745 are located inside the chassis 1. A connecting shaft 7421 is fixedly welded on the driving cam 742, and the connecting shaft 7421 is rotatably connected with the frame 1 through a bearing; the rotating member 743 includes a motor, the rotating member 743 is fixed to the frame 1, and an output shaft of the rotating member 743 is connected to the connecting shaft 7421 through a chain transmission (a chain is not shown in the figure) to drive the connecting shaft 7421 to rotate, thereby driving the driving cam 742 to rotate.

Referring to fig. 6 and 7, a guide hole 16 is formed through a side wall of the frame 1 on the side where the fixed template 71 is provided along the thickness direction of the fixed template 71, and the connecting rod 741 is slidably connected to an inner side wall of the guide hole 16. One end of the connecting rod 741 away from the inside of the frame 1 is welded to the sliding plate 72, one end of the connecting rod 741 located inside the frame 1 is welded to the driving rod 744, and the driving rod 744 is located on a side of the driving cam 742 away from the sliding plate 72. A transmission sleeve 7441 is rotatably mounted on the side wall of the driving rod 744 close to one side of the sliding plate 72, the transmission sleeve 7441 can rotate around the axis thereof, and the peripheral wall of the transmission sleeve 7441 is abutted with the peripheral wall of the driving cam 742; the elastic member 745 comprises a spring, the elastic member 745 is sleeved on the connecting rod 741, and one end of the elastic member 745 is welded to the driving rod 744, and the other end is welded to the inner side wall of the frame 1, so that the peripheral wall of the transmission sleeve 7441 and the peripheral wall of the driving cam 742 are always kept in a state of abutting.

Referring to fig. 7, the peripheral wall of the drive cam 742 is a drive surface, the drive surface includes a distance portion 7422, an approach portion 7423, an abutting portion 7424, a cutout portion 7425 and a deviation portion 7426, and the distance portion 7422, the approach portion 7423, the abutting portion 7424, the cutout portion 7425 and the deviation portion 7426 are sequentially arranged in the circumferential direction of the connecting shaft 7421 and are connected end to end. The remote portion 7422 has an arc surface coaxial with the connecting shaft 7421, the abutting portion 7424 has an arc surface coaxial with the connecting shaft 7421, and the radius of curvature of the remote portion 7422 is larger than that of the abutting portion 7424; one end of the cutout 7425 remote from the abutting portion 7424 extends in the circumferential direction of the connecting shaft 7421 and is inclined in the direction of the connecting shaft 7421.

Referring to fig. 6 and 7, when the driving cam 742 rotates and the driving sleeve 7441 abuts against the separating portion 7422, a space is formed between the sliding template 73 and the fixed template 71 for the packaging bag to pass through. Electric heating wires are arranged in the fixed template 71 and the sliding template 73 respectively, so that the fixed template 71 and the sliding template 73 can heat the film 5 of the packaging bag. When the driving sleeve 7441 abuts against the approach portion 7423, the sliding plate 72 drives the sliding template 73 to move towards the fixed template 71; when the driving sleeve 7441 abuts against the abutting portion 7424, the sliding template 73 tightly abuts against the fixed template 71, so that the films 5 of the packaging bags at the position of the fixed template 71 are mutually sealed and bonded. When the driving sleeve 7441 abuts against the cutting part 7425, the sliding plate 72 continues to move toward the fixed die plate 71, and at this time, the sliding die plate 73 relatively slides toward the sliding plate 72, so that the cutter 733 cuts the adhered position of the packaging bag. When the driving sleeve 7441 abuts against the deviation portion 7426, the sliding plate 72 moves away from the fixed template 71 under the action of the elastic member 745, so that the packaging bag moves downwards continuously.

The implementation principle of the embodiment of the application is as follows:

when materials are packaged, the driving motor 3212 drives the abutting roller 3211 to rotate so as to drive the winding roller 51 to rotate to unwind the film 5; meanwhile, the traction assembly 14 draws the film 5 so that the film 5 is continuously conveyed into the packaging bag forming hopper 12; after the film 5 is moved out downwards from the packaging bag forming hopper 12, the film 5 can automatically form a cylindrical packaging bag wrapping the conveying pipe 131; the back sealing component 15 seals the back of the packaging bag, and the transverse sealing device 7 can seal the lower end of the packaging bag; at this time, the material in the hopper 13 is conveyed into the packaging bag through the conveying pipe 131; then, the traction device continues to pull the packaging bag downwards; when the packing bag moves by a predetermined length, the sliding plate 72 moves toward the fixing plate 71 to seal the upper end of the packing bag containing the material, and the cutter 733 cuts off the sealed packing bag.

The abutting roller 3211 can drive the winding roller 51 to rotate, so that the winding roller 51 actively unwinds the film 5, thereby being beneficial to reducing the traction force applied to the film 5 and reducing the possibility of deformation or damage of the film 5.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A send membrane drive mechanism which characterized in that: the film winding device comprises a support (3) and a rotating roller (4) used for sleeving a winding roller (51) of a film (5), wherein the rotating roller (4) is rotatably connected with the support (3), and the rotating roller (4) is provided with a fixing assembly (6) used for fixing the winding roller (51); the support (3) is rotatably provided with a mounting rack (321), and the axial direction of a rotating shaft of the mounting rack (321) is arranged along the axial direction of the rotating roller (4); the mounting frame (321) is rotatably provided with an abutting roller (3211) which is used for keeping abutting contact with the outermost film (5) on the winding roller (51), and the abutting roller (3211) is positioned above the rotating roller (4); the mounting rack (321) is provided with a driving motor (3212) for driving the abutting roller (3211) to rotate;

the fixing assembly (6) comprises an installation ring plate (61) connected with the rotating roller (4), a driving piece (62) connected with the installation ring plate (61), and a plurality of abutting rods (63) used for abutting against the inner side wall of the winding roller (51), wherein all the abutting rods (63) are sequentially arranged along the circumferential direction of the rotating roller (4); the abutting rod (63) is connected with the mounting ring plate (61) in a sliding manner along the radial direction of the rotating roller (4); the driving piece (62) is used for driving the abutting rod (63) to slide in a reciprocating mode;

the driving piece (62) comprises a plurality of driving screw rods (621) which are rotatably connected with the mounting ring plate (61), a driving bevel gear (622) which is rotatably connected with the mounting ring plate (61), and a plurality of transmission bevel gears (623) which are meshed with the driving bevel gear (622); the transmission bevel gears (623) are in one-to-one correspondence with the driving screw rods (621), and the driving screw rods (621) are in one-to-one correspondence with the abutting rods (63); the transmission bevel gear (623) is connected with a corresponding driving screw rod (621), and the driving screw rod (621) is in threaded connection with a corresponding abutting rod (63).

2. The film feeding and drawing mechanism according to claim 1, characterized in that: the driving bevel gear (622) is connected with a fixed rod (6232) in a sliding mode, and the mounting ring plate (61) is provided with a fixed hole (613) for inserting one end of the fixed rod (6232); the fixed rod (6232) is connected with an elastic connecting piece (6233) for driving the fixed rod (6232) to move towards the direction of the fixed hole (613); when the abutting rod (63) abuts against the inner side wall of the winding roller (51), the fixing rod (6232) is aligned with the fixing hole (613).

3. The film feeding and drawing mechanism according to claim 1, characterized in that: the mounting ring plate (61) is provided with a mounting sleeve (611) sleeved on the outer peripheral wall of the rotating roller (4), and the mounting sleeve (611) is in threaded connection with an abutting screw (6112) abutted against the outer peripheral wall of the rotating roller (4).

4. The utility model provides an use plastic bag packaging machine that send membrane drive mechanism which characterized in that: comprising a frame (1) and a film feeding and drawing mechanism (2) according to any one of claims 1 to 3, wherein the support (3) is connected with the frame (1); the machine frame (1) is provided with a packaging bag forming hopper (12) and a material conveying pipe (131) inserted in the packaging bag forming hopper (12); the frame (1) is provided with a back sealing component (15) and a traction component (14) which are positioned below the packaging bag forming hopper (12) and used for sealing and connecting the two sides of the film (5) to form a packaging bag, and the traction component is used for driving the packaging bag to move downwards; the frame (1) is provided with a transverse sealing device (7) for sealing the lower end of the packaging bag.

5. The plastic bag packaging machine applying the film feeding traction mechanism according to claim 4, wherein: the transverse sealing device (7) comprises a fixed template (71) connected with the rack (1), a sliding plate (72) connected with the rack (1) in a sliding manner along the thickness direction of the fixed template (71), a sliding template (73) connected with the sliding plate (72), and a sliding assembly (74) used for driving the sliding plate (72) to slide; the fixed template (71) and the sliding template (73) can both heat the film (5) of the packaging bag; the sliding template (73) can be abutted with the fixed template (71) to clamp the packaging bag.

6. The plastic bag packaging machine applying the film feeding traction mechanism as claimed in claim 5, wherein: the sliding assembly (74) comprises a connecting rod (741) connected with the sliding plate (72), a driving cam (742) rotationally connected with the frame (1), a rotating piece (743) used for driving the driving cam (742) to rotate, a driving rod (744) used for abutting against the peripheral wall of the driving cam (742), and an elastic piece (745) used for keeping the driving rod (744) abutting against the driving cam (742); the driving rod (744) is connected with a connecting rod (741); one end of the elastic element (745) is connected with the frame (1), and the other end is connected with the driving rod (744).

7. The plastic bag packaging machine applying the film feeding traction mechanism as claimed in claim 6, wherein: a transmission sleeve (7441) is arranged between the driving rod (744) and the driving cam (742), and the transmission sleeve (7441) is rotatably connected with the driving rod (744) around the axis of the transmission sleeve; the outer peripheral wall of the drive sleeve (7441) and the peripheral wall of the drive cam (742) are in contact with each other.

8. The plastic bag packaging machine applying the film feeding traction mechanism as claimed in claim 5, wherein: the sliding template (73) is connected with the sliding plate (72) in a sliding mode along the sliding direction of the sliding plate (72), and an elastic abutting piece (731) used for driving the sliding template (73) to move towards the fixed template (71) is connected with the sliding template; the side wall of the sliding template (73) facing the fixed template (71) is provided with an abdicating hole (732) in a penetrating manner along the sliding direction of the sliding template (73), a cutter (733) is arranged in the abdicating hole (732), and the cutter (733) is connected with the sliding plate (72); the cutting edge of the cutter (733) can be abutted against the fixed template (71) to cut the packaging bag.