CN112706461A - Waste material cutting process of degradable plastic bag continuous production line - Google Patents

Abstract

The invention belongs to the technical field of plastic packaging bag production and processing, and particularly relates to a waste material cutting process of a degradable plastic bag continuous production line, which comprises a front conveying unit, a rear conveying unit, a pressing unit and a hot sealing and cutting unit, wherein the front conveying unit and the rear conveying unit are arranged at intervals along the horizontal direction, the pressing unit is movably arranged between the front conveying unit and the rear conveying unit along the vertical direction, and the hot sealing and cutting unit is positioned below the front conveying unit and the rear conveying unit and positioned on two sides of a movement path of the pressing unit; the waste material area is folded by the material pressing unit, the waste material is cut by the hot sealing and cutting unit, and the fracture generated by cutting is connected, so that the continuous production and processing of a production line are realized.

Description

Waste material cutting process of degradable plastic bag continuous production line

Technical Field

The invention belongs to the technical field of plastic packaging bag production and processing, and particularly relates to a waste material cutting process of a degradable plastic bag continuous production line.

Background

The plastic bag is generally processed and formed by adopting a blow molding process, and the general process flow comprises the following steps: firstly, heating and melting plastic particles by using a blowing device, blowing the plastic particles into a cylindrical plastic film, then hot-pressing the cylindrical plastic film to form a transverse hot seam, and finally cutting the cylindrical plastic film from the hot seam by using a cutting device to obtain a plastic bag monomer. In the process of blow molding of plastic bags, once impurities are mixed in molten plastic, holes are easily formed in the process of blow molding, the occurrence of the impurities is difficult to avoid, so that the phenomenon of film breakage often occurs in the prior art in the process of blow molding, and when the phenomenon occurs, the method in the prior art is as follows: firstly, the blow molding device is controlled to stop, then the broken hole area is manually torn off from the film, a knot is made on the film at the upper end of the blow molding device, then the blow molding device is restarted, and the film is pulled to the rolling position again. This type of treatment requires a blow molding device to be stopped halfway, so that it is not possible to realize a series connection with a downstream hot sealing and cutting device, and it is difficult to realize continuous automated production, which affects production efficiency. Therefore, the inventor of the invention designs a device capable of plugging and reinforcing a broken hole area on line when a broken hole occurs in a film, so that the film can still be subjected to continuous blow molding and conveyed to the downstream after the broken hole occurs, but the broken hole area cannot form a qualified plastic bag monomer, so that the film needs to be removed on a production line, and meanwhile, the seam generated after the broken hole area is removed can be effectively identified by downstream equipment so as to be avoided when the downstream equipment is processed.

Disclosure of Invention

The invention aims to provide a waste material cutting process of a degradable plastic bag continuous production line, which can be used for cutting a region with a broken hole on a material from the production line and ensuring the continuous operation of the production line.

The technical scheme adopted by the invention is as follows:

a waste material cutting process of a degradable plastic bag continuous production line adopts a waste material cutting mechanism to cut off a strip-shaped material hole area on the production line, and comprises a front conveying unit, a rear conveying unit, a pressing unit and a hot sealing cutting unit, wherein the front conveying unit and the rear conveying unit are arranged at intervals along the horizontal direction, the pressing unit is movably arranged between the front conveying unit and the rear conveying unit along the vertical direction, and the hot sealing cutting unit is positioned below the front conveying unit and the rear conveying unit and positioned on two sides of a movement path of the pressing unit; the method comprises the steps that a pressing unit is located above a front conveying unit and a rear conveying unit in a normal state, a flattened tubular plastic film is conveyed from the front conveying unit to the rear conveying unit, when a waste material section on the strip-shaped material reaches a position between the front conveying unit and the rear conveying unit, the pressing unit descends, the rear conveying unit stops conveying, meanwhile, the front conveying unit continues conveying, the pressing unit pulls the strip-shaped material accumulated between the front conveying unit and the rear conveying unit into a U shape, the pressing unit descends to a preset position and stops conveying, meanwhile, a hot sealing and cutting unit enables two side walls of the U-shaped material to be hot sealed and bonded into a whole and cuts the strip-shaped material below a hot sealing area, and then the pressing unit ascends and returns to an initial station; the pressing unit comprises a posture adjusting mechanism which is assembled to be capable of transferring the pressing unit to the side of the strip-shaped material so as to avoid the strip-shaped material when the pressing unit ascends.

The material pressing unit comprises a material pressing roller, the material pressing roller is rotatably arranged on a lifting support, the lifting support is movably connected with the rack along the vertical direction, a rotating shaft of the material pressing roller is pivoted with the lifting support to enable the rotating shaft of the material pressing roller to be capable of being switched between a horizontal state and a vertical state, and a pivoting shaft between the material pressing roller and the lifting support is located beside the strip-shaped material when the material pressing roller is seen along the vertical direction; the posture adjusting mechanism is assembled to enable the rotating shaft of the nip roll to keep a horizontal posture in the descending process of the nip roll and to keep the rotating shaft of the nip roll in a vertical state in the ascending process of the nip roll.

A pivot shaft between the material pressing roller and the lifting support is fixedly connected with a rotating shaft of the material pressing roller and is rotatably connected with the lifting support, the posture adjusting mechanism comprises a torsion spring arranged between the pivot shaft and the lifting support, and the torsion spring is assembled to enable the elasticity of the torsion spring to drive the material pressing roller to swing from a horizontal state to a vertical state; the pivot shaft is also provided with a swinging block, the upper end of the movement stroke of the lifting bracket is provided with a guide wheel, the guide wheel is rotationally connected with the rack, and when the lifting bracket moves upwards to the upper end of the movement stroke, the guide wheel can push and push the swinging block to enable the material pressing roller to swing from a vertical state to a horizontal state; the device also comprises a locking mechanism which is assembled to enable the nip roll to be kept in a horizontal state when the nip roll is in the horizontal state, and the locking mechanism can release the nip roll from the horizontal state to enable the nip roll to swing to a vertical state under the action of the torsion spring when the lifting support descends to the lower end of the movement stroke.

The locking mechanism comprises a flat shaft arranged on the pivot shaft and a locking block connected with the lifting support in a sliding manner, the locking block is provided with a U-shaped groove with the width consistent with that between two straight walls of the flat shaft and a circular groove with the diameter larger than the maximum width of the flat shaft, the circular groove and the U-shaped groove are communicated into a whole, and when the pressure roller is in a horizontal state, the two straight walls of the flat shaft are flush with two side walls of the U-shaped groove; a first elastic element is arranged between the locking block and the lifting support, and the first elastic element is assembled to drive the U-shaped groove of the locking block to be clamped on the flat shaft; the lifting support's motion stroke lower extreme is equipped with the unlocking piece, and unlocking piece and frame rigid coupling, unlocking piece and locking piece keep off and connect, move extremely when the nip rolls when predetermineeing the position unlocking piece can extrude the locking piece and make the circular slot on the locking piece relative with the flat axle, and then make the pin joint axle can swing under the torsional spring effect.

The hot sealing and cutting unit comprises two movable seats which are arranged in an opening and closing mode along the horizontal direction, cutters which are mutually in shearing fit are arranged on the two movable seats respectively, a clamping block and a hot sealing block are arranged on each movable seat respectively, each hot sealing block is an electric heating element and is in a long strip shape, the clamping block and the hot sealing block are located on one side, opposite to the two movable seats, of each hot sealing block, each hot sealing block is fixedly connected with the corresponding movable seat, each clamping block is movably connected with the corresponding movable seat along the opening and closing direction of the corresponding movable seat, a second elastic element is arranged between each clamping block and the corresponding movable seat, and the second elastic elements are assembled to enable the elastic force of each second elastic element to drive the corresponding clamping block to move in the direction away from the corresponding movable seat; the cutter is positioned below the hot sealing block; the clamping blocks protrude out of the hot sealing blocks in a normal state, namely the two clamping blocks are firstly folded when the two movable seats are mutually folded, and the two hot sealing blocks are mutually folded after one end of the second elastic unit is deformed for a distance.

The horizontal rail sliding connection that sets up on sliding seat and the frame, be equipped with aggregate unit between lifting support and the sliding seat, aggregate unit is assembled for driving two sliding seats each other and folds when lifting support drives the nip roll down extremely when predetermineeing the position, and can drive two sliding seats each other and separate when lifting support goes upward.

The link device comprises a trunnion which is movably arranged and extends upwards and a drive plate fixedly connected with a lifting support, wherein an inclined waist-shaped groove is formed in the drive plate, the lower end of the inclined waist-shaped groove penetrates through the edge of the drive plate, the trunnion can enter the inclined waist-shaped groove from the lower end of the inclined waist-shaped groove in the descending process of the lifting support, the movable seat is folded along with the descending of the drive plate, the movable seat is firstly kept away from each other along with the ascending of the drive plate in the ascending process of the lifting support, and the trunnion is moved away from the lower end of the inclined waist-shaped hole to stop keeping away the movable seat.

Two material pressing rollers are symmetrically arranged along the center line of the strip-shaped material, and the two material pressing rollers swing to the two sides of the strip-shaped material respectively when the lifting support moves upwards.

And the front conveying unit and the rear conveying unit are conveying rollers.

The on-line treatment device for the waste of the strip-shaped materials comprises a waste cutting process of the continuous production line of the degradable plastic bags.

The invention has the technical effects that: the waste material area is folded by the material pressing unit, the waste material is cut by the hot sealing and cutting unit, and the fracture generated by cutting is connected, so that the continuous production and processing of a production line are realized.

Drawings

FIG. 1 is a perspective view of a scrap cutting mechanism and a seam marking mechanism provided by an embodiment of the present invention;

FIG. 2 is a perspective view of a scrap cutting mechanism provided in accordance with an embodiment of the present invention;

fig. 3 is a perspective view of a swaging unit provided in an embodiment of the present invention;

fig. 4 is a partial exploded view of a swaging unit provided in an embodiment of the present invention;

FIG. 5 is a perspective view of a hot seal cutting unit provided by an embodiment of the present invention;

FIG. 6 is a partial exploded view of a hot seal cutting unit provided by an embodiment of the present invention;

FIG. 7 is a perspective view of a seam marking mechanism provided by embodiments of the present invention;

FIG. 8 is a perspective view of an emptying roll, pulling mechanism and shearing mechanism provided by an embodiment of the present invention;

FIG. 9 is a perspective view of a transfer mechanism provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of a transfer mechanism provided by an embodiment of the present invention;

FIG. 11 is an exploded view of a clamp provided by an embodiment of the present invention;

FIG. 12 is a side view of a pallet according to an embodiment of the present invention.

The rack in the invention refers to a supporting structure fixed with the ground, the supporting structure of the rack is hidden in the attached drawing of the invention, and the specific shape of the supporting structure can be selected according to the actual spatial layout.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 1, an online waste disposal apparatus for degrading strip-shaped materials comprises a waste material cutting mechanism 50 and a seam marking mechanism 60, which are arranged in sequence along the conveying direction of the strip-shaped materials.

As shown in fig. 2 to 6, the scrap cutting mechanism 50 includes a front conveying unit 51, a rear conveying unit 52, a pressing unit 53 and a hot seal cutting unit 54, the front conveying unit 51 and the rear conveying unit 52 are arranged at intervals along the horizontal direction, the pressing unit 53 is movably arranged between the front conveying unit 51 and the rear conveying unit 52 along the vertical direction, and the hot seal cutting unit 54 is located below the front conveying unit 51 and the rear conveying unit 52 and on both sides of the moving path of the pressing unit 53; the material pressing unit 53 is normally located above the front conveying unit 51 and the rear conveying unit 52, the band-shaped material, i.e., the flattened tubular plastic film 1, is conveyed from the front conveying unit 51 to the rear conveying unit 52, when the scrap section on the strip-shaped material reaches between the front conveying unit 51 and the rear conveying unit 52, the swaging unit 53 descends, the rear conveying unit 52 stops conveying, meanwhile, the front conveying unit 51 continues to convey, the pressing unit 53 draws the belt-shaped materials accumulated between the front conveying unit 51 and the rear conveying unit 52 into a U shape, the pressing unit 53 descends to a preset position, then the front conveying unit 51 stops conveying, meanwhile, the hot sealing and cutting unit 54 hot seals and bonds two side walls of the U-shaped material into a whole and cuts the belt-shaped material below the hot sealing area, a seam 2 with a page-shaped structure is generated on the belt-shaped material at the moment, and then the pressing unit 53 moves upwards and returns to the initial station; the swaging unit 53 includes a posture adjusting mechanism that is assembled to be able to transfer the swaging unit 53 to a side of the belt-shaped material so that the swaging unit 53 avoids the belt-shaped material when ascending.

As shown in fig. 7-12, the seam calibration mechanism 60 includes a strip-shaped calibration object 3 made of a colored hot-melt material, the strip-shaped calibration object 3 is wound on an emptying roller 61, and the axial direction of the emptying roller 61 is parallel to the length direction of the strip-shaped material; the device further comprises a drawing mechanism 62 for drawing the strip-shaped calibration object 3 from the discharging roller 61 along the width direction of the strip-shaped material, a cutting mechanism 63 for cutting the drawn strip-shaped calibration object 3, a transferring mechanism 64 for transferring the cut strip-shaped calibration object 3 to the seam 2 and clamping the strip-shaped calibration object 3 between the page-shaped structure and the strip-shaped material, and a hot pressing mechanism 65 for heat-sealing and bonding the page-shaped structure, the strip-shaped calibration object 3 and the strip-shaped material into a whole. The invention can realize the prior cutting of waste materials and simultaneously calibrate the generated seam 2, so that subsequent processing equipment can avoid the position of the seam 2 and reduce the number of defective products.

Preferably, as shown in fig. 3 and 4, the nip unit 53 includes a nip roll 531, the nip roll 531 is rotatably disposed on a lifting support 532, the lifting support 532 is movably connected to the frame along the vertical direction, a rotating shaft of the nip roll 531 is pivotally connected to the lifting support 532, so that the rotating shaft of the nip roll 531 can be switched between a horizontal state and a vertical state, and a pivoting shaft 533 between the nip roll 531 and the lifting support 532 is located beside the belt-shaped material when viewed along the vertical direction; the posture adjusting mechanism is configured to enable the rotating shaft of the nip roll 531 to maintain a horizontal posture during the downward movement of the nip roll 531, and to enable the rotating shaft of the nip roll 531 to maintain a vertical state during the upward movement of the nip roll 531.

Preferably, a pivot shaft 533 between the nip roll 531 and the lifting support 532 is fixedly connected with a rotating shaft of the nip roll 531, and is rotatably connected with the lifting support 532, the posture adjusting mechanism comprises a torsion spring 534 disposed between the pivot shaft 533 and the lifting support 532, and the torsion spring 534 is assembled such that the elasticity thereof can drive the nip roll 531 to swing from a horizontal state to a vertical state; the pivot shaft 533 is further provided with a swinging block 535, the upper end of the movement stroke of the lifting support 532 is provided with a guide wheel 539, the guide wheel 539 is rotatably connected with the frame, and when the lifting support 532 moves upwards to the upper end of the movement stroke, the guide wheel 539 can push and push the swinging block 535 to enable the nip roll 531 to swing from a vertical state to a horizontal state; the device further comprises a locking mechanism which is assembled to enable the nip roll 531 to be kept in a horizontal state when the nip roll 531 is in the horizontal state, and to enable the nip roll 531 to be released from the horizontal state to be swung to a vertical state under the action of the torsion spring 534 when the lifting bracket 532 descends to the lower end of the movement stroke; the locking mechanism comprises a flat shaft 5331 arranged on the pivot shaft 533 and a locking block 536 in sliding connection with the lifting support 532, the locking block 536 is provided with a U-shaped groove with the width consistent with that between two straight walls of the flat shaft 5331 and a circular groove with the diameter larger than the maximum width of the flat shaft 5331, the circular groove and the U-shaped groove are communicated into a whole, and when the pressure roller 531 is in a horizontal state, the two straight walls of the flat shaft 5331 are flush with two side walls of the U-shaped groove; a first elastic element 537 is arranged between the locking block 536 and the lifting bracket 532, and the first elastic element 537 is configured to drive the U-shaped groove of the locking block 536 to be clamped on the flat shaft 5331; the lower end of the movement stroke of the lifting support 532 is provided with an unlocking block 538, the unlocking block 538 is fixedly connected with the rack, the unlocking block 538 is connected with the locking block 536 in a blocking mode, when the pressure roller 531 moves to the preset position, the unlocking block 538 can extrude the locking block 536 and enable a circular groove in the locking block 536 to be opposite to the flat shaft 5331, and then the pivot shaft 533 can swing under the action of the torsion spring 534.

Preferably, as shown in fig. 5 and 6, the ironing and sealing cutting unit 54 includes two movable seats 541 arranged to open and close along a horizontal direction, the two movable seats 541 are respectively provided with a cutting knife 544 configured to be in shearing fit with each other, each of the two movable seats 541 is provided with a clamping block 542 and an ironing and sealing block 543, the ironing and sealing block 543 is an electric heating element, the clamping block 542 and the ironing and sealing block 543 are both long-strip-shaped, the clamping block 542 and the ironing and sealing block 543 are both located on opposite sides of the two movable seats 541, wherein the ironing and sealing block 543 is fixedly connected with the movable seats 541, the clamping block 542 is movably connected with the movable seats 541 along the opening and closing direction of the two movable seats 541, a second elastic element 545 is arranged between the clamping block 542 and the movable seats 541, and the second elastic element 545 is assembled such that its elastic force can drive the clamping block 542 to move in a direction away from the movable seats 541; the cutting knife 544 is positioned below the sealing block 543; the clamping block 542 protrudes from the sealing block 543 in a normal state, that is, when the two movable seats 541 are folded, the two clamping blocks 542 are folded first, and when the second elastic unit is deformed by a distance, the two sealing blocks 543 are folded.

Preferably, the movable seats 541 are slidably connected with a horizontal rail arranged on the frame, a linkage device is arranged between the lifting support 532 and the movable seats 541, and the linkage device is configured to simultaneously drive the two movable seats 541 to be closed when the lifting support 532 drives the nip roll 531 to move downwards to the preset position, and simultaneously drive the two movable seats 541 to be separated when the lifting support 532 moves upwards; the linkage device comprises trunnions 546 which are movably arranged in a protruding and extending mode and a driving plate 5321 fixedly connected with a lifting support 532, wherein an inclined waist-shaped groove 5322 is formed in the driving plate 5321, the lower end of the inclined waist-shaped groove 5322 penetrates through the edge of the driving plate 5321, the trunnions 546 can enter the inclined waist-shaped groove 5322 from the lower end of the inclined waist-shaped groove 5322 in the descending process of the lifting support 532, then the movable seats 541 are folded together along with the descending of the driving plate 5321, the movable seats 541 are firstly separated from each other along with the ascending of the driving plate 5321 in the ascending process of the lifting support 532, and then the trunnions 546 are moved away from the lower end of the inclined waist-shaped hole 422 to stop the movable.

Preferably, the two nip rolls 531 are symmetrically arranged along the center line of the strip-shaped material, and the two nip rolls 531 swing to two sides of the strip-shaped material respectively when the lifting support 532 moves upwards; the front conveying unit 51 and the rear conveying unit 52 are both conveying rollers.

Preferably, as shown in fig. 9, 11 and 12, the transfer mechanism 64 includes a pallet 642, and the strip-shaped materials are pulled by the pulling device and fed along the top surface of the pallet 642, and when the signature-like structures reach the pallet 642, the signature-like structures can be blocked by the sides of the pallet 642 and turned over to be attached to the strip-shaped materials; the transfer mechanism 64 further comprises clamping portions 641 arranged on two sides of the pallet 642, the discharging roller 61 and the drawing mechanism 62 are located below the pallet 642, the clamping portions 641 are arranged in a rotating mode along a horizontal axis, when the clamping portions 641 rotate to a first preset station, two ends of the strip-shaped calibration object 3 drawn by the drawing mechanism 62 can be clamped tightly, after the clamping portions 641 clamp the strip-shaped calibration object 3, the cutting mechanism 63 cuts the strip-shaped calibration object 3 from the discharging roller 61, and when the clamping portions 641 rotate to a second preset station, the strip-shaped calibration object 3 can be inserted between the page-shaped structure and the strip-shaped calibration object, and two ends of the strip-shaped calibration object 3 can be loosened; an arc-shaped guide surface which smoothly extends downwards from the top surface of the saddle 642 is arranged at one end of the saddle 642, namely one end of the belt-shaped material coming material, and the belt-shaped material coming direction and the top surface of the saddle 642 form a certain included angle so that the partial area of the belt-shaped material is attached to the arc-shaped guide surface; the centre of rotation of the clamping portion 641 is coaxial with the arc center of the arc guide surface, and the belt surface of the belt-shaped calibration object 3 is tangent to the arc guide surface when the clamping portion 641 rotates to the arc guide surface. The principle of inserting the strip-shaped object 3 into the seam 2 is shown in fig. 10, which is an enlarged schematic diagram, and in practical application, the strip-shaped object 3 is tightly attached to the bottom surface of the strip-shaped material during the transfer process, so that the strip-shaped object can be reliably inserted into the seam between the seam 2 and the strip-shaped material without slipping down below the seam 2.

Preferably, the clamping part 641 comprises a rotary seat 6413, the rotary seat 6413 is fixedly connected with a rotary shaft, the rotary shaft is rotatably connected with the supporting platform 642 in the horizontal direction, the rotary seat 6413 is provided with a first clamping block 6411 and a second clamping block 6412, the first clamping block 6411 is movably connected with the rotary seat 6413 in the radial direction of the rotary shaft, the second clamping block 6412 is movably connected with the rotary seat 6413 in the radial direction of the rotary shaft, and the first clamping block 6411 and the second clamping block 6412 are opened and closed; the first clamping block 6411 has a station a and a station b along the moving direction, wherein the station b is closer to the axis of the rotating shaft than the station a, the second clamping block 6412 has a station c and a station d along the moving direction, wherein the station d is closer to the axis of the rotating shaft than the station c, only when the first clamping block 6411 is at the station b and the second clamping block 6412 is at the station c, the two stations are in the clamping state, and the other stations are in the opening state; the clamping driving mechanism is assembled to drive the first clamping block 6411 and the second clamping block 6412 to be linked in the rotating process of the rotating shaft, namely, the first clamping block 6411 can be driven to the station b when the clamping portion 641 reaches the first preset station, the second clamping block 6412 can be driven to the station d when the clamping portion 641 reaches the second preset station, and the first clamping block 6411 can be driven to the station a and the second clamping block 6412 can be driven to the station c simultaneously when the clamping portion 641 rotates from the second preset station to the first preset station and does not reach the first preset station.

Preferably, the clamping driving mechanism comprises a first elastic component 6414 arranged between the first clamping block 6411 and the rotary seat 6413 and a second elastic component 6415 arranged between the second clamping block 6412 and the rotary seat 6413, wherein the first elastic component 6414 is assembled to enable the elastic force thereof to drive the first clamping block 6411 to move from the station a to the station b, and the second elastic component 6415 is assembled to enable the elastic force thereof to drive the second clamping block 6412 to move from the station c to the station d; the grip driving mechanism further includes a first locking unit and a second locking unit, the first locking unit being fitted to be able to hold the first block 6411 at the station a when the first block 6411 is at the station a and to be able to release the first block 6411 from the station a when the grip portion 641 reaches the first preset station; the second locking unit is fitted to be able to hold the second block 6412 at the station c when the second block 6412 is at the station c and to be able to release the second block 6412 from the station c when the grip portion 641 reaches the second preset station; the clamping driving mechanism further comprises a cam plate 643 fixedly connected with the frame, a wheel surface of the cam plate 643 is in rolling fit with rollers arranged on the first clamping block 6411 and the second clamping block 6412, and when the clamping portion 641 rotates from the second preset station to the first preset station and does not reach the first preset station, the first clamping block 6411 can be driven from the station b to the station a and the second clamping block 6412 can be driven from the station d to the station c.

Preferably, the first clamping block 6411 is in sliding fit with the rotating seat 6413 through a first guide rod 6416, the first locking unit includes a first locking plate 6418 slidably connected with the rotating seat 6413 along a radial direction of the first guide rod 6416, the first locking plate 6418 is provided with a first arc-shaped notch 64181, the first guide rod 6416 is provided with a first locking groove 64161, the first locking plate 6418 can enable the first arc-shaped notch 64181 to be opposite to or staggered with respect to the first locking groove 64161 during sliding, the first guide rod 6416 can freely slide with respect to the rotating seat 6413 when the first arc-shaped notch 64181 is opposite to the first locking groove 64161, and the first locking plate 6418 can be clamped in the first locking groove 64161 when the first arc-shaped notch 64181 is staggered with respect to the first locking groove 64161 so as to prevent the first guide rod 6416 from sliding with respect to the rotating seat 6413; a third elastic component 64182 and a limiting part for limiting the sliding stroke of the first locking plate 6418 are arranged between the first locking plate 6418 and the rotary seat 6413, and the first locking plate 6418 can keep the first arc-shaped notch 64181 and the first locking groove 64161 in a staggered state under the action of the third elastic component 64182; the first locking plate 6418 is provided with an arched protrusion, the frame is further provided with a first arched unlocking block 644 which is blocked with the arched protrusion of the first locking plate 6418, and when the clamping portion 641 rotates to the first preset station, the first arched unlocking block 644 can press the first locking plate 6418 to enable the first arched notch 64181 to be opposite to the first locking groove 64161.

Preferably, the second clamping block 6412 is in sliding fit with the rotary seat 6413 through a second guide rod 6417, the second locking unit includes a second locking plate 6419 slidably connected with the rotary seat 6413 along the radial direction of the second guide rod 6417, the second locking plate 6419 is provided with a second arc-shaped notch 64191, the second guide rod 6417 is provided with a second locking groove 64171, the second locking plate 6419 can enable the second arc-shaped notch 64191 to be opposite to or staggered with respect to the second locking groove 64171 during sliding, the second guide rod 6417 can freely slide with respect to the rotary seat 6413 when the second arc-shaped notch 64191 is opposite to the second locking groove 64171, and the second locking plate 6419 can be blocked in the second locking groove 64171 when the second arc-shaped notch 64191 is staggered with respect to the second locking groove 64171 so as to prevent the first guide rod 6416 from sliding with respect to the rotary seat 6413; a fourth elastic member 64192 and a limiting part for limiting the sliding stroke of the second locking plate 6419 are arranged between the second locking plate 6419 and the rotary seat 6413, and the second locking plate 6419 can keep the second arc-shaped notch 64191 and the second locking groove 64171 in a staggered state under the action of the fourth elastic member 64192; the second locking plate 6419 is provided with an arched protrusion, the frame is further provided with a second arched unlocking block 645 which is blocked with the arched protrusion of the second locking plate 6419, and when the clamping portion 641 rotates to the second preset station, the second arched unlocking block 645 can extrude the second locking plate 6419 to enable the second arc-shaped notch 64191 to be opposite to the second locking groove 64171. The clamping and releasing actions of the clamping part 641 are realized by using a simple mechanical transmission structure, the equipment structure is simplified, the equipment cost is reduced, and the reliability of the mechanical transmission structure is higher compared with a single electric control mode.

Preferably, as shown in fig. 8, the discharging roller 61 is rotatably disposed on the frame, and the discharging end of the discharging roller 61 is provided with a guiding frame 611 for the strip-shaped calibration object 3 to pass through; the drawing mechanism 62 comprises an electric cylinder 621 arranged along the width direction of the belt-shaped material, and an electric clamp 622 is arranged on a sliding block of the electric cylinder 621; the hot pressing mechanism 65 comprises a hot pressing plate 651 movably arranged in the vertical direction, a sensor 652 used for identifying the strip-shaped calibration object 3 is arranged beside the hot pressing plate 651, the hot pressing plate 651 is connected with a vertically arranged linear driving element, the linear driving element and the sensor 652 are electrically connected with a controller, when the sensor 652 detects that the strip-shaped calibration object 3 reaches the position below the hot pressing plate 651, the controller controls the action of a traction device of the strip-shaped material, so that the strip-shaped material below the hot pressing plate 651 stops feeding, and meanwhile, the hot pressing plate 651 is controlled to carry out hot pressing on the area where the strip-shaped calibration object 3 is located. The cutting device comprises two blades which are opened and closed up and down, the specific driving mode of the two blades can be selected from the prior art, and the two blades are driven by a pneumatic element or an electric element. The hot sealing device 70 and the cutting device 80 at the downstream of the production line in the invention both adopt mature structures in the prior art, and are not described again.

Example 2

A method of on-line treatment of waste material using the apparatus described in example 1 comprising the steps of:

step 1: drawing the waste material area to the lower part of the belt-shaped material conveying path to form a U shape;

step 2: two side walls of the upper end of the U-shaped waste material area are hot-sealed and bonded together, and waste materials below the hot-sealed area are cut; forming a page-shaped seam 2 on the belt-shaped material;

step 3; conveying the seam 2 to a seam 2 calibration station downstream;

and 4, step 4: and a strip of band-shaped calibration object 3 made of colored hot melt material is clamped between the page-shaped seam 2 and the band-shaped material at a calibration station of the seam 2, and the band-shaped calibration object 3, the page-shaped seam 2 and the band-shaped material are bonded into a whole by heat sealing.

In the step 1, the pressing unit 53 is adopted to draw the waste material area.

In the step 2, the upper end of the U-shaped waste area is hot sealed and cut by using the hot sealing and cutting unit 54.

In said step 4, the transfer mechanism 64 is used to transfer the strip-shaped object 3 to the seam 2 and to clamp the strip-shaped object 3 between the book-page-shaped structure and the strip-shaped material.

In the step 4, the page-shaped structure, the band-shaped calibration object 3 and the band-shaped material are thermally sealed and bonded into a whole by using the hot-pressing mechanism 65.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims (10)

1. The utility model provides a waste material excision technology of degradable plastic bag continuous production line which characterized in that: the method comprises the following steps that a waste material cutting mechanism is adopted to cut off a broken hole area of a strip-shaped material on a production line, the waste material cutting mechanism comprises a front conveying unit (51), a rear conveying unit (52), a pressing unit (53) and a hot sealing and cutting unit (54), the front conveying unit (51) and the rear conveying unit (52) are arranged at intervals along the horizontal direction, the pressing unit (53) is movably arranged between the front conveying unit (51) and the rear conveying unit (52) along the vertical direction, and the hot sealing and cutting unit (54) is located below the front conveying unit (51) and the rear conveying unit (52) and located on two sides of a moving path of the pressing unit (53); the material pressing unit (53) is positioned above the front conveying unit (51) and the rear conveying unit (52) under normal state, the belt-shaped material, namely the flattened cylindrical plastic film (1), is conveyed from the front conveying unit (51) to the rear conveying unit (52), when the waste material section on the strip-shaped material reaches between the front conveying unit (51) and the rear conveying unit (52), the pressing unit (53) descends, the rear conveying unit (52) stops conveying, meanwhile, the front conveying unit (51) continues to convey, the pressing unit (53) draws the belt-shaped materials accumulated between the front conveying unit (51) and the rear conveying unit (52) into a U shape, the pressing unit (53) descends to a preset position and then the front conveying unit (51) stops conveying, meanwhile, a hot sealing and cutting unit (54) is used for hot sealing and bonding two side walls of the U-shaped material into a whole and cutting the strip-shaped material below a hot sealing area, and then a pressing unit (53) ascends and returns to an initial station; the pressing unit (53) comprises a posture adjusting mechanism which is assembled to be capable of transferring the pressing unit (53) to the side part of the strip-shaped material so as to avoid the strip-shaped material when the pressing unit (53) ascends.

2. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 1, characterized in that: the material pressing unit (53) comprises a material pressing roller (531), the material pressing roller (531) is rotatably arranged on a lifting support (532), the lifting support (532) is movably connected with the rack along the vertical direction, a rotating shaft of the material pressing roller (531) is pivoted with the lifting support (532) to enable the rotating shaft of the material pressing roller (531) to be switched between a horizontal state and a vertical state, and a pivoting shaft (533) between the material pressing roller (531) and the lifting support (532) is positioned beside the strip-shaped material when the material pressing roller (531) and the lifting support (532) are seen along the vertical direction; the posture adjusting mechanism is assembled to enable the rotating shaft of the nip roll (531) to keep a horizontal posture during the descending process of the nip roll (531), and enable the rotating shaft of the nip roll (531) to keep a vertical state during the ascending process of the nip roll (531).

3. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 2, characterized in that: a pivot shaft (533) between the nip roll (531) and the lifting support (532) is fixedly connected with a rotating shaft of the nip roll (531) and is rotatably connected with the lifting support (532), the posture adjusting mechanism comprises a torsion spring (534) arranged between the pivot shaft (533) and the lifting support (532), and the torsion spring (534) is assembled to enable the elasticity of the torsion spring to drive the nip roll (531) to swing from a horizontal state to a vertical state; the pivoting shaft (533) is further provided with a swinging block (535), the upper end of the movement stroke of the lifting support (532) is provided with a guide wheel (539), the guide wheel (539) is rotatably connected with the frame, and when the lifting support (532) moves upwards to the upper end of the movement stroke, the guide wheel (539) can push and push the swinging block (535) to enable the material pressing roller (531) to swing from a vertical state to a horizontal state; the automatic feeding device further comprises a locking mechanism which is assembled to enable the nip roller (531) to be kept in a horizontal state when the nip roller (531) is in the horizontal state, and the locking mechanism can release the nip roller (531) from the horizontal state to enable the nip roller to swing to a vertical state under the action of the torsion spring (534) when the lifting support (532) descends to the lower end of the movement stroke.

4. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 3, characterized in that: the locking mechanism comprises a flat shaft (5331) arranged on the pivot shaft (533) and a locking block (536) connected with the lifting support (532) in a sliding manner, the locking block (536) is provided with a U-shaped groove with the width consistent with that between two straight walls of the flat shaft (5331) and a circular groove with the diameter larger than the maximum width of the flat shaft (5331), the circular groove and the U-shaped groove are communicated into a whole, and when the pressure roller (531) is in a horizontal state, the two straight walls of the flat shaft (5331) are flush with two side walls of the U-shaped groove; a first elastic element (537) is arranged between the locking block (536) and the lifting bracket (532), and the first elastic element (537) is assembled to drive the U-shaped groove of the locking block (536) to be clamped on the flat shaft (5331); the lower end of the movement stroke of the lifting support (532) is provided with an unlocking block (538), the unlocking block (538) is fixedly connected with the rack, the unlocking block (538) is connected with the locking block (536) in a blocking mode, when the pressure roller (531) moves to the preset position, the unlocking block (538) can extrude the locking block (536) and enable a circular groove in the locking block (536) to be opposite to the flat shaft (5331), and then the pivot shaft (533) can swing under the action of the torsion spring (534).

5. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 2, characterized in that: the hot sealing and cutting unit (54) comprises two movable seats (541) which are opened and closed along the horizontal direction, cutters (544) which are mutually sheared and matched are respectively arranged on the two movable seats (541), a clamping block (542) and a hot sealing block (543) are respectively arranged on the two movable seats (541), the hot sealing block (543) is an electric heating element, the clamping block (542) and the hot sealing block (543) are both strip-shaped, the clamping block (542) and the hot sealing block (543) are both positioned on one side opposite to the two movable seats (541), wherein the hot sealing block (543) is fixedly connected with the movable seats (541), the clamping block (542) is movably connected with the movable seats (541) along the opening and closing direction of the two movable seats (541), a second elastic element (545) is arranged between the clamping block (542) and the movable seat (541), and the second elastic element (545) is assembled in a way that the elastic force thereof can drive the clamping block (542) to move towards the direction far away from the movable seat (541) where the clamping block is located; the cutter (544) is positioned below the sealing block (543); the clamping blocks (542) are arranged to protrude out of the ironing seal blocks (543) in a normal state, namely when the two movable seats (541) are mutually folded, the two clamping blocks (542) are firstly folded, and when one end of the second elastic unit is deformed, the two ironing seal blocks (543) are mutually folded.

6. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 5, wherein: horizontal track sliding connection that sets up in sliding seat (541) and the frame, be equipped with aggregate unit between lift support (532) and sliding seat (541), aggregate unit is assembled and is driven two sliding seat (541) and fold each other when lift support (532) drive nip roll (531) down extremely when predetermineeing the position, and can drive two sliding seat (541) when lift support (532) goes upward and separate each other simultaneously.

7. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 6, characterized in that: the linkage device comprises a trunnion (546) which is movably arranged in a protruding and extending mode and a driving plate (5321) fixedly connected with a lifting support (532), wherein an inclined waist-shaped groove (5322) is formed in the driving plate (5321), the lower end of the inclined waist-shaped groove (5322) penetrates through the edge of the driving plate (5321) to be arranged, when the lifting support (532) descends, the trunnion (546) can enter the inclined waist-shaped groove (5322) from the lower end of the inclined waist-shaped groove (5322), then the movable seats (541) are folded with descending of the driving plate (5321), when the lifting support (532) ascends, the movable seats (541) are firstly far away from each other with ascending of the driving plate (5321), and then the trunnion (546) moves out from the lower end of the inclined waist-shaped hole (422) to stop the movable seats (541) from being far away.

8. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 4, wherein: two material pressing rollers (531) are symmetrically arranged along the center line of the strip-shaped material, and the two material pressing rollers (531) swing to the two sides of the strip-shaped material respectively when the lifting support (532) moves upwards.

9. The waste material cutting process of the continuous production line of degradable plastic bags according to claim 1, characterized in that: the front conveying unit (51) and the rear conveying unit (52) are both conveying rollers.

10. An online treatment method for waste materials of strip materials is characterized in that: a waste material cutting process comprising the continuous manufacturing line of degradable plastic bags according to any one of claims 1 to 9.

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