CN114643747B

CN114643747B - Production method of biodegradable plastic bag

Info

Publication number: CN114643747B
Application number: CN202210299169.6A
Authority: CN
Inventors: 都智刚; 李成林
Original assignee: Zhejiang Tianji New Material Technology Co ltd
Current assignee: Zhejiang Tianji New Material Technology Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-09-20
Anticipated expiration: 2042-03-25
Also published as: CN114643747A

Abstract

The invention provides a production method of a biodegradable plastic bag, which comprises the following steps: step one, a feeding process; step two, cutting and arranging process; step three, a transportation procedure; and step four, a blanking process, namely in the process that the material conveying unit enters the blanking unit, the material clamping mechanism is turned over by the pushing and rotating mechanism until the vest bag surface is parallel to the plane where the blanking table is located, then the prepressing assembly moves downwards to prepress the vest bag, then a punching needle punches a hole, and finally a cutter cuts the surface. According to the invention, after punching, the punching needles are still in the stacked vest bags and are pre-positioned for the edge cutting process, so that the defect that the edge cutting process has larger deviation due to relative sliding of the stacked vest bags in the middle part because the positioning is carried out only in a mode of extruding the upper end when the stacked vest bags are subjected to edge cutting is avoided.

Description

Production method of biodegradable plastic bag

Technical Field

The invention relates to the technical field of plastic bag production, in particular to a production method of a biodegradable plastic bag.

Background

The undershirt bag is the indispensable article in the daily life, places the in-process at the undershirt bag, generally stacks multiunit undershirt bag, then inserts couple department through the hole that will reserve at the undershirt bag opening part and places, and convenient to use person extracts at any time.

Chinese patent CN 208197678U discloses a cutting device for plastic bags, the on-line screen storage device comprises a base, the left side fixedly connected with left socle of base upper surface, the upper surface of base is seted up flutedly, the right branch frame has been placed to the inside of recess, two symmetrical through-holes have been seted up to the left surface of right branch frame, two symmetrical slide bars of inside wall fixed connection of recess, the left surface of right branch frame is fixed to be inlayed and is had the screwed pipe, the cavity has been seted up to the inside of base. This plastic bag is with tailorring device uses through the cooperation that is provided with two slide bars and first threaded rod, can make the removal of right branch frame more stable, has avoided the right branch frame crooked problem to appear at the in-process of adjusting the width, makes the last work or material rest of this cutter more facilitate the use, through being provided with positive reverse motor, for the round trip movement provides power about the right branch frame, makes the last work or material rest of this cutter not need operator manual regulation width, convenient to use and popularization.

However, the technical scheme has the following defects:

1. in the blanking process of the vest bags, the holes and the faces are synchronously blanked, when the number of the vest bags to be blanked at one time is large, the plastic bags in the middle can still slide relatively even if the upper parts of the vest bags are pressed when the vest bags on the upper parts are blanked, so that the openings of the blanked vest bags deflect, and the normal use is influenced;

2. after the punching of the vest bags is finished, the punching knife and the punching mechanism are synchronously separated from the vest bags after the punching is finished, so that the vest bags which are orderly arranged are easily lifted by the punching knife and the punching mechanism, and the vest bags need to be rearranged at a later stage.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a production method of a biodegradable plastic bag, which adopts a mode of punching first and then cutting faces, ensures that a punching mechanism is positioned inside a vest bag after punching, positions a face cutting mechanism, and avoids the problem that relatively sliding occurs between stacked vest bags in the face cutting process, which causes large deviation in cutting; in addition, the invention adopts a mode that the blanking mechanism gradually returns after the blanking operation is finished, thereby preventing the later-period rearrangement caused by lifting the stacked and orderly vest bags in the returning process.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for producing biodegradable plastic bags comprises the following steps:

step one, a feeding process, wherein raw materials are continuously fed into an arrangement unit along a feeding unit through a transmission roller;

step two, cutting off and arranging, namely, carrying out lateral alignment on the raw materials entering the arranging unit through a centering mechanism, and then synchronously driving a first eccentric part, a second eccentric part and a third eccentric part which are arranged at a certain angle to sequentially carry out cutting off, pressing down and pressing up through a transmission assembly;

step three, a transportation procedure, namely moving the material conveying unit from the blanking unit to the bottom of the arranging unit along the guide mechanism, and transporting the arranged and neatly stacked vest bags from the material sliding table to the blanking unit through the material clamping mechanism;

step four, blanking process, will get into blanking unit department in-process at the fortune material unit, the mechanism that pushes away turns over the mechanism that presss from both sides material to vest bag face parallel with the plane at blanking platform place, and prepressing assembly moves down earlier afterwards with the vest bag pre-compaction, and the rethread punch hole needle carries out punching work, cuts out the face through the cut-off knife at last.

As an improvement, the cutting arrangement process comprises:

side alignment procedure: raw materials continuously enter the arrangement unit and slide down to be in contact with the material supporting sheet along the centering mechanisms arranged at the two sides of the material sliding table;

a cutting step: when the bottom of the raw material is contacted with the material supporting sheet every time, the second eccentric part rotates to drive the cutter to cut off the raw material.

As an improvement, the cutting process comprises:

a pressing procedure: the raw materials are obliquely leaned against the lower part of the sliding table in a sheet shape when cut off, the main shaft drives the second lifting rod to move downwards through the third eccentric part, and the second lifting rod downwards flattens the lower part of the raw materials through the second flattening part and the floating part;

an upward pressing procedure: the main shaft synchronously drives the first eccentric part to rotate, and the first eccentric part drives the first flattening part to move downwards through the lifting plate so as to flatten the upper part of the raw material.

As an improvement, the transporting process comprises:

the process comprises the following steps: the rack moves to the arrangement unit along the guide mechanism, contacts with the lifting wheel through the tooth part and drives the lifting wheel to reciprocate up and down, the lifting wheel drives the containing frame to move up and down through the supporting rod, and the containing frame drives the cut raw materials to bump up and down through the material supporting piece;

a transfer process: the rack drives the first pushing piece to move through the second pushing piece, the first pushing piece pushes the supporting sheet to compress the thrust spring and enters the containing frame, the raw materials stacked on the supporting sheet enter the plane where the clamping groove and the gasket are located, and then the material clamping mechanism sends the raw materials into the blanking unit.

As an improvement, a torsional spring is arranged at the joint of the material clamping mechanism and the rack, the material clamping mechanism moves to the blanking unit, and the pushing and rotating mechanism generates reverse thrust to the material clamping mechanism, so that the material clamping mechanism overturns, and the side face of the raw material is flush with the plane where the blanking table is located.

As an improvement, the second pushing piece is located between the clamping mechanism and the first pushing piece, and the height of the second pushing piece is lower than the plane where the gasket is located.

As an improvement, the blanking process comprises:

an initial pressing procedure: the cylinder drives the pressure plate to move downwards, and the pressure plate drives the inner pressure piece to move downwards through the guide plate, so that the periphery of the end face of the raw material is supported by the inner pressure piece;

a punching procedure: the pressing disc continues to move downwards and pushes the punching hole to punch holes aiming at the folded raw materials;

a trimming procedure: after punching a hole, the pressure disk still moves down to promote the spacing ring downstream, the spacing ring passes through the pillar and drives the mounting panel downstream, makes the cut-off knife of connecting at the mounting panel lower extreme cut out the raw materials.

As an improvement, the blanking process further includes:

a return process: after the raw materials are cut out and formed, the air cylinder drives the pressure plate to move upwards, and the cut-off knife, the punching needle and the internal pressure piece sequentially perform return stroke work.

As an improvement, the inner side of the guide plate is provided with a groove for accommodating the inner pressing piece, and the width of the groove is smaller than that of the inner pressing piece;

the inner pressing piece is arranged in a U shape, the inner pressing piece is connected with the guide plate in a sliding mode, and the upper end of the inner pressing piece is propped against the top of the inner groove of the guide plate through the first adjusting spring.

As an improvement, the plane of the upper end of the punching needle is higher than the plane of the upper end of the limiting ring; the punching needle is connected with the mounting plate in a sliding mode.

In addition, the invention also provides a biodegradable vest bag production line, which comprises a feeding unit and further comprises:

the arrangement unit is arranged on the side part of the feeding unit; and

the material conveying unit is arranged below the arrangement unit;

the arrangement unit includes:

a transmission assembly;

the cutting and swinging assembly is arranged below the transmission assembly;

the material guide assembly is arranged at the lower part of the cutting and swinging assembly;

raw materials continuously enter the material guide assembly through the feeding unit to be leveled left and right, the transmission assembly controls the cutting and swinging assembly to reciprocate up and down, the raw materials are cut off, the surface of the raw materials which are positioned at the material guide assembly after being cut off is flattened synchronously, and the raw materials are moved into the lower portion of the material guide assembly through the material conveying unit to be leveled up and down and transferred after being stacked.

As an improvement, the transmission assembly comprises:

the first eccentric part, the second eccentric part and the third eccentric part are arranged along the axial direction in a certain angle in sequence.

As an improvement, the cutting pendulum assembly comprises:

the first material pressing mechanism is arranged at the lower part of the first eccentric part;

the cutting mechanism is arranged at the lower part of the second eccentric part;

and the second pressing mechanism is arranged at the lower part of the third eccentric part.

As an improvement, the first swaging mechanism includes:

a first guide plate;

the first lifting rod is movably inserted into the first guide plate;

a first return spring, the first return spring;

the first flattening piece is connected to the lower end of the first lifting rod.

As an improvement, the second pressing mechanism comprises:

the upper part of the second flattening piece is connected with a flattening piece;

the first flattening piece, the second flattening piece and the floating piece are positioned in the same inclined plane, and the inclination angle of the first flattening piece, the second flattening piece and the floating piece is the same as the bottom surface of the material guide assembly stacking position.

As an improvement, the blanking mechanism comprises:

the supporting plate is connected to the side part of the first guide plate;

the lifting plate is movably inserted in the supporting plate;

and the cutter is connected to the lower end of the lifting plate.

As an improvement, the material guide assembly comprises:

a material sliding table;

the centering mechanism is used for arranging the centering mechanism with the raw materials being leveled left and right at the bottom of the sliding table;

the pre-storing mechanism is arranged at the bottom of the material sliding table;

and the vibration block is connected to the upper side part of the sliding table.

As a refinement, the pre-storing mechanism comprises:

the accommodating frame is connected to the bottom of the sliding table;

the material supporting sheet is inserted in the accommodating frame in a sliding mode;

the lower end of the material supporting sheet and positioned in the accommodating frame are connected with a sliding block, and the upper bottom of the material supporting sheet is connected with a first pushing piece;

the lower end of the sliding block is connected with a thrust spring;

the lower end of the containing frame is connected with a supporting rod, and the lower end of the supporting rod is rotatably connected with a lifting wheel.

As an improvement, the material conveying unit comprises:

a guide mechanism;

the conveying mechanism is arranged on the upper part of the guide mechanism;

the fortune material mechanism includes:

the rack is connected to the upper part of the guide mechanism in a sliding manner;

the second pushing piece is connected to the upper end of the rack frame;

the clamping mechanism is rotatably connected to the side part of the rack;

the upper end of the material clamping mechanism is provided with a material clamping groove, and the bottom of the material clamping groove is rotatably connected with a clamping plate;

the clamping mechanisms are symmetrically provided with two groups about the rack, and a gasket is connected between the two groups of clamping mechanisms and positioned at the bottom of the clamping groove.

The invention has the beneficial effects that:

1. according to the invention, after punching, the punching needle is still in the stacked vest bags and is pre-positioned for the edge cutting process, so that the defect that the edge cutting process has larger deviation due to relative sliding of the stacked vest bags positioned in the middle part because the positioning is carried out only in a mode of extruding the upper end when the stacked vest bags are subjected to edge cutting is avoided.

2. The invention adopts a gradual return mode to ensure that the cutting knife with larger relative friction force with the vest bag returns first, the punching needle with reduced relative friction force returns later, and the inner pressing piece without relative friction force is finally activated, thereby preventing the vest bag which is stacked orderly from being brought out due to the friction action when the mechanism returns.

3. According to the invention, after raw materials are fed each time and before being cut off, the raw materials are matched with the chamfer at the upper part of the centering mechanism, and meanwhile, the stacked stations are arranged to be inclined, so that the left side and the right side of the raw materials can be in a parallel and level state in the feeding process each time.

4. According to the invention, the second flattening piece is driven by the second lifting rod to move downwards, the second flattening piece is matched with the trowelling piece to move downwards, the cut raw materials with the bottoms spreading on the upper end of the material supporting sheet are straightened, and the trouble of the soft characteristic of the vest bag on placement is reduced.

5. According to the invention, the first flattening piece is driven by the first lifting rod to move downwards, the first flattening piece flattens the straightened raw material by the second flattening piece towards the material sliding table again, and the part of the cut raw material is flattened, so that the cut raw material can be compactly stacked together.

6. According to the invention, the gear teeth and the lifting wheel are matched to drive the supporting rod to reciprocate up and down, the supporting rod drives the material supporting sheet to shake the stacked raw materials up and down slowly through the accommodating frame, and meanwhile, the accommodating frame drives the vibration block to move up and down along the guide groove through the material sliding table, so that the same moving stroke of the vibration block is ensured, and the raw materials can be stacked up and down and leveled.

In conclusion, the invention has the advantages of accurate cutting, neat arrangement of the stacked vest bags after cutting and the like.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of a blanking unit according to the present invention;

FIG. 4 is a diagram illustrating a relationship between the pre-pressing assembly and the blanking assembly;

FIG. 5 is a schematic structural view of a pre-pressing assembly according to the present invention;

FIG. 6 is a diagram showing the relationship between the cutting table and the pushing mechanism;

FIG. 7 is a drawing showing the relationship between the cutting blade and the punching pin according to the present invention;

FIG. 8 is a schematic diagram of the feed process of the present invention;

FIG. 9 is a view of the second flattening member in mating relationship with the first flattening member in accordance with the present invention;

FIG. 10 is a diagram illustrating the relationship between the material transporting unit and the arranging unit;

FIG. 11 is a diagram illustrating the operation of the arrangement unit transferred to the material handling unit according to the present invention;

FIG. 12 is a drawing of the relationship between the vibrating mass and the fixing plate according to the present invention;

fig. 13 is an enlarged view of the invention at a in fig. 12.

In the figure, 1, arranging units; 2. a material conveying unit; 3. a blanking unit; 4. a feeding unit; 11. a transmission assembly; 110. a main shaft; 111. a first eccentric member; 112. a second eccentric member; 113. a third eccentric member; 12. a cutting and swinging assembly; 121. a first material pressing mechanism; 1211. a first guide plate; 1212. a first lifting rod; 1213. a first return spring; 1214. a first flattening member; 122. a material cutting mechanism; 1221. a support plate; 1222. a lifting plate; 1223. a base; 1224. pre-tightening the spring; 1225. a guide bar; 1226. a cutter; 1227. a correction mechanism; 123. a second pressing mechanism; 1231. a second guide plate; 1232. a second lifting rod; 1233. a second return spring; 1234. a second flattening member; 1235. a floating piece; 13. a material guiding assembly; 131. a material sliding table; 132. a centering mechanism; 133. a prestoring mechanism; 1331. an accommodating frame; 13311. a strut; 13312. a lifting wheel; 1332. a material supporting sheet; 13321. a slider; 13322. a first pushing member; 1333. a thrust spring; 134. a vibration block; 14. a fixing plate; 141. a guide groove; 201. a guide mechanism; 2011. a connecting plate; 202. a material conveying mechanism; 2021. a rack frame; 2022. a second pushing member; 2023. a material clamping mechanism; 20231. a material clamping groove; 20232. a splint; 20233. a gasket; 203. a drive wheel; 301. a blanking table; 302. a support member; 3021. a guide table; 303. a pre-pressing component; 3031. a cylinder; 3032. a platen; 3033. a guide plate; 3034. an inner pressing piece; 30341. a first guide member; 30342. a first regulating spring; 304. a material cutting component; 3041. mounting a plate; 30411. a cutter; 3042. punching a hole needle; 30421. a second regulating spring; 30422. a limiting block; 3043. a pillar; 30431. a third regulating spring; 30432. a limiting ring; 305. a push-turn mechanism; 3051. a support; 3052. and (7) a fillet block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example one

As shown in fig. 1, a method for producing biodegradable plastic bags comprises the following steps:

step one, a feeding process, wherein raw materials are continuously fed into the arrangement unit 1 through a transmission roller along the feeding unit 4;

step two, a cutting and arranging procedure, namely, the raw materials entering the arranging unit 1 are subjected to lateral alignment through a centering mechanism 132, and then the transmission assembly 11 synchronously drives the first eccentric part 111, the second eccentric part 112 and the third eccentric part 113 which are arranged at a certain angle to sequentially perform cutting, pressing down and pressing up;

step three, a transportation procedure, namely moving the material conveying unit 2 from the blanking unit 3 to the bottom of the arranging unit 1 along the guide mechanism 201, and transporting the arranged and orderly stacked vest bags from the material sliding table 131 to the blanking unit 3 through the material clamping mechanism 2023;

step four, a blanking process, in the process that the material conveying unit 2 enters the blanking unit 3, the material clamping mechanism 2023 is turned over by the pushing and rotating mechanism 305 until the vest bag surface is parallel to the plane where the blanking table 301 is located, then the prepressing assembly 303 moves downwards to prepress the vest bag, then the punching pin 3042 is used for punching, and finally the surface is cut by the cutter 30411.

As an improvement, the cutting arrangement process comprises:

side alignment procedure: the raw materials continuously enter the arrangement unit 1 and slide down to contact with the material supporting sheet 1332 along the centering mechanisms 132 arranged at the two sides of the material sliding table 131;

a cutting step: the second eccentric member 112 rotates to drive the cutter 1226 to cut the material each time the bottom of the material contacts the material holding piece 1332.

Further, the cutting step includes:

a pressing procedure: the cut raw material leans against the lower part of the sliding table 131 in a sheet-like inclined manner, the main shaft 110 drives the second lifting rod 1232 to move downwards through the third eccentric part 113, and the second lifting rod 1232 flattens the lower part of the raw material downwards through the second flattening part 1234 and the troweling part 1235;

an upward pressing procedure: the main shaft 110 synchronously drives the first eccentric element 111 to rotate, and the first eccentric element 111 drives the first flattening element 1214 to move downwards through the lifting plate 1222 so as to flatten the upper portion of the raw material.

It should be noted that, in the present invention, while the vest bags are cut by the cutter 1226, the side surfaces of the cut vest bags are abutted against the lower portion of the material sliding table 131, and the bottom portions of the vest bags are located at the upper portion of the material supporting sheet 1332, the lower portions of a plurality of groups of the cut vest bags with gaps therebetween are pushed to be adhered to each other by the pressing step, and then the upper portions of the vest bags are adhered to each other by the pressing step, so that the crease phenomenon between the vest bags due to one-time pressing in the existing pressing manner is avoided gradually.

As an improvement, the transporting process comprises:

the process comprises the following steps: the rack 2021 moves to the arrangement unit 1 along the guide mechanism 201, contacts with the lifting wheel 13312 through a tooth part and drives the lifting wheel 13312 to reciprocate up and down, the lifting wheel 13312 drives the containing frame 1331 to move up and down through the supporting rod 13311, and the containing frame 1331 drives the cut raw materials to bump up and down through the supporting rod 1332;

a transfer process: the rack 2021 drives the first push piece 13322 to move through the second push piece 2022, the first push piece 13322 pushes the material supporting piece 1332 to compress the thrust spring 1333 and enter the accommodating frame 1331, at this time, the material stacked on the material supporting piece 1332 enters the plane where the material clamping groove 20231 and the gasket 20233 are located, and then, the material clamping mechanism 2023 feeds the material to the blanking unit 3.

Further, a torsion spring is arranged at the connection position of the clamping mechanism 2023 and the rack 2021, the clamping mechanism 2023 moves to the blanking unit 3, and the pushing and rotating mechanism 305 generates reverse pushing force to the clamping mechanism 2023, so that the clamping mechanism 2023 is turned over, and the side surface of the raw material is flush with the plane where the blanking table 301 is located.

It should be added that the pushing and rotating mechanism 305 includes a bracket 3051 connected to the bottom side of the blanking table 301, and a rounded block 3052 for pushing and rotating the material clamping mechanism 2023 is connected to the side of the bracket 3051.

Furthermore, the second pushing element 2022 is located between the clamping mechanism 2023 and the first pushing element 13322, and the height of the second pushing element 2022 is lower than the plane of the gasket 20233, so as to prevent the second pushing element 2022 from blocking the transfer of the raw material when the raw material enters the clamping groove 20231 from the supporting strip 1332.

It should be noted that, the invention adopts the process of upsetting, when the vest bag enters the material clamping mechanism 2023, the side faces are aligned through the side aligning process, the pressing down process and the pressing up process, and the vest bag is shaken up and down under the condition of front and back alignment, so that the multiple groups of stacked raw materials can be aligned up and down.

As an improvement, the blanking process comprises:

an initial pressing procedure: the air cylinder 3031 drives the pressure plate 3032 to move downwards, and the pressure plate 3032 drives the inner pressure member 3034 to move downwards through the guide plate 3033, so that the periphery of the end face of the raw material is resisted by the inner pressure member 3034;

a punching procedure: the platen 3032 continues to move downwards and pushes the punching needle 3042 to punch holes on the folded raw materials;

a trimming procedure: after the punching is finished, the platen 3032 still moves downward and pushes the stop ring 30432 to move downward, and the stop ring 30432 drives the mounting plate 3041 to move downward through the pillar 3043, so as to prompt the cutter 30411 connected to the lower end of the mounting plate 3041 to cut the raw material.

Further, the blanking process further includes:

a return process: after the raw material is cut and molded, the air cylinder 3031 drives the pressure plate 3032 to move upwards, and the cutter 30411, the punching needle 3042 and the inner pressure piece 3034 perform return operation in sequence.

Further, a groove for receiving the inner pressure member 3034 is formed inside the guide plate 3033, and the width of the groove is smaller than that of the inner pressure member 3034.

Wherein, the plane of the upper end of the punching needle 3042 is higher than the plane of the upper end of the spacing ring 30432; the punching needle 3042 is slidably connected with the mounting plate 3041;

a second adjusting spring 30421 is slidably sleeved outside the punching needle 3042, and the upper end of the second adjusting spring 30421 is connected with a limit block 30422.

Additionally, an n-shaped supporting member 302 is connected to the bottom of the blanking table 301, a guide table 3021 is connected to the upper side of the supporting member 302, and the spacing ring 30432 and the mounting plate 3041 are supported by a pillar 3043.

Example two

As shown in fig. 2 and 9-13, wherein the same or corresponding components as in the first embodiment are designated by the same reference numerals as in the first embodiment, only the differences from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that:

as shown in fig. 2 and 10, a biodegradable vest bag production line includes a feeding unit 4, and further includes:

the arrangement unit 1 is arranged on the side part of the feeding unit 4;

the material conveying unit 2 is arranged below the arrangement unit 1, and the material conveying unit 2 is arranged below the arrangement unit 1; and

the blanking unit 3 is arranged at the discharge end of the material conveying unit 2;

the arrangement unit 1 includes:

a transmission assembly 11;

the cutting and swinging assembly 12 is arranged below the transmission assembly 11, and the cutting and swinging assembly 12 is arranged below the transmission assembly 11;

the material guide assembly 13 is arranged at the lower part of the cutting and swinging assembly 12, and the material guide assembly 13 is arranged at the lower part of the cutting and swinging assembly 12;

raw materials continuously enter the material guide assembly 13 through the feeding unit 4 to be leveled left and right, the transmission assembly 11 controls the cutting and swinging assembly 12 to reciprocate up and down, the raw materials are cut off and the surfaces of the raw materials which are cut off and located at the material guide assembly 13 are flattened synchronously, and the raw materials which are stacked are moved into the lower portion of the material guide assembly 13 through the material conveying unit 2 to be leveled up and down and transferred.

As a modification, as shown in fig. 10, the transmission assembly 11 includes:

a first eccentric part 111, a second eccentric part 112 and a third eccentric part 113 which are arranged along the axial direction in sequence at a certain angle;

the first eccentric part 111, the second eccentric part 112 and the third eccentric part 113 are all fixedly sleeved on the outer side of the main shaft 110, and a motor is arranged at the end part of the main shaft 110.

Preferably, the first eccentric member 111, the second eccentric member 112 and the third eccentric member 113 are preferably cams.

Further, as shown in fig. 8, the cutting pendulum assembly 12 includes:

the first pressing mechanism 121, the first pressing mechanism 121 is arranged at the lower part of the first eccentric part 111;

the blanking mechanism 122 is arranged at the lower part of the second eccentric part 112;

the second pressing mechanism 123, the second pressing mechanism 123 is arranged at the lower part of the third eccentric part 113;

the second pressing mechanism 123 includes a second guide plate 1231 connected to the fixing plate 14;

a second lifting rod 1232 is movably inserted into the second guide plate 1231 and located right below the third eccentric member 113, and a second return spring 1233 is movably sleeved outside the second lifting rod 1232 and located at the upper end of the second guide plate 1231.

Further, as shown in fig. 9, the first pressing mechanism 121 includes:

a first guide plate 1211;

a first lifting rod 1212, the first lifting rod 1212 being movably inserted into the first guide 1211;

a first return spring 1213, the first return spring 1213;

a first flattening element 1214, wherein said first flattening element 1214 is attached to the lower end of said first lifting rod 1212.

Wherein, the second swaging mechanism 123 includes:

a second flattening piece 1234, wherein a floating piece 1235 is connected to the upper part of the second flattening piece 1234;

the first flattening element 1214, the second flattening element 1234 and the floating element 1235 are disposed in the same inclined plane and have the same inclination angle as the bottom surface of the material guiding assembly 13 at the stacking position.

As shown in fig. 8 and 10, the blanking mechanism 122 includes:

a support plate 1221, the support plate 1221 being coupled to a side of the first guide plate 1211;

the lifting plate 1222 is movably inserted into the supporting plate 1221;

the lower end of the lifting plate 1222 is connected with a guide rod 1225, a pre-tightening spring 1224 is movably sleeved on the outer side of the guide rod 1225, the lower end of the pre-tightening spring 1224 is connected with a base 1223, the base 1223 is L-shaped, and the bottom of the base 1223 is connected to the upper end of the supporting plate 1221.

A cutter 1226, wherein the cutter 1226 is connected to the lower end of the lifting plate 1222.

Preferably, two sets of protruding parts are arranged at the upper end of the cutter 1226, and the protruding parts are movably sleeved with a correcting mechanism 1227 which is connected with the fixing plate 14 and prevents the cutter 1226 from deflecting.

As a modification, as shown in fig. 11, the material guide assembly 13 includes:

a material sliding table 131;

the material sliding table 131 is divided into two sections, the upper end is used for sliding materials, and the lower end is arranged at the upper end of the containing frame 1331 and used for storing cut raw materials.

The centering mechanism 132 is used for arranging the centering mechanism 132 with the raw materials being leveled left and right at the bottom of the sliding table 131;

the centering mechanism 132 is provided with a chamfer angle along the raw material inlet end;

the pre-storing mechanism 133, the pre-storing mechanism 133 is arranged at the bottom of the material sliding table 131;

and the vibration block 134 is connected to the upper side part of the sliding table 131 through the vibration block 134.

Further, the pre-storing mechanism 133 includes:

an accommodating frame 1331, wherein the accommodating frame 1331 is connected to the bottom of the sliding material table 131;

a material supporting sheet 1332, wherein the material supporting sheet 1332 is inserted into the containing frame 1331 in a sliding way;

a slide block 13321 is connected to the lower end of the material supporting piece 1332 and positioned in the accommodating frame 1331, and a first push piece 13322 is connected to the upper bottom of the material supporting piece;

the lower end of the sliding block 13321 is connected with a thrust spring 1333;

the lower end of the containing frame 1331 is connected with a supporting rod 13311, and the lower end of the supporting rod 13311 is rotatably connected with a lifting wheel 13312;

the arrangement unit 1 further comprises a fixed plate 14, and guide grooves 141 for providing up-and-down swing estimation for the vibration blocks 134 are arranged on two sides of the fixed plate 14.

It should be noted that, when the raw material enters the arrangement unit 1 from the feeding unit 4, as shown in fig. 8, the head of the raw material moves down to the centering mechanism 132 along the sliding table 131, in the present invention, after each raw material feeding and before cutting, the raw material matches with the chamfer on the upper part of the centering mechanism 132, and the stacking station is set to be inclined, so that the left and right sides of the raw material can reach a level state in the feeding process;

as shown in fig. 8-9, when the bottom of the raw material contacts the material supporting sheet 1332, the motor drives the main shaft 110 to rotate, the main shaft 110 preferably drives the lifting plate 1222 through the second eccentric part 112 to drive the cutter 1226 to move downward to cut the raw material, then the main shaft 110 drives the second flattening part 1234 through the second lifting rod 1232 to move downward, the second flattening part 1234 cooperates with the smoothing part 1235 to move downward to straighten the raw material whose bottom is spread on the upper end of the material supporting sheet 1332 after cutting, so as to reduce the disturbance of the soft characteristic of the vest bag on placement;

subsequently, the main shaft 110 drives the first flattening piece 1214 to move downwards through the first lifting rod 1212, the first flattening piece 1214 flattens the raw material straightened by the second flattening piece 1234 towards the sliding table 131 again, and flattens the cut portion of the raw material, so as to ensure that the cut raw materials can be stacked together compactly.

Further, as shown in fig. 11 to 12, the material transporting unit 2 includes:

the guide mechanism 201, the position where the said guide mechanism 201 cooperates with rack 2021 is set as the U-shape, the guide mechanism 201 is connected with fixed plate 14 through the multiple-unit tie bar 2011;

the material conveying mechanism 202 is arranged at the upper part of the guide mechanism 201;

the material conveying mechanism 202 comprises:

a rack 2021, wherein the rack 2021 is slidably connected to the upper part of the guide mechanism 201;

a second pusher 2022, said second pusher 2022 being attached to said rack 2021 at the upper end thereof;

the clamping mechanism 2023 is rotatably connected to the side part of the rack 2021;

the upper end of the clamping mechanism 2023 is provided with a clamping groove 20231, and the bottom of the clamping groove 20231 is rotatably connected with a clamping plate 20232;

the clamping mechanisms 2023 are symmetrically provided with two groups about the rack 2021, and a gasket 20233 is connected between the two groups of clamping mechanisms 2023 and at the bottom of the clamping groove 20231;

the upper end of the rack 2021 is engaged with a driving wheel 203, and a driving motor is arranged at the end part of the driving wheel 203.

It should be noted that even though there is a certain gravity in the raw materials themselves, when more raw materials are stacked together, the stacked raw materials still have a phenomenon of being uneven up and down in the middle, as shown in fig. 12-13, in order to solve the problem, the present invention arranges a support rod 13311 with a lifting wheel 13312 at the lower end of the accommodating frame 1331, when the raw materials stacked on the stripping piece 1332 are transferred to the material clamping groove 20231, the driving wheel 203 drives the material clamping mechanism 2023 through the rack 2021 and moves from the blanking unit 3 towards the arrangement unit 1, the rack 2021 drives the support rod 13311 to reciprocate up and down through the gear teeth and the lifting wheel 13312, the support rod 13311 drives the material supporting piece 1332 through the accommodating frame 1 to shake the stacked raw materials 1332 up and down slowly, and at the same time, the accommodating frame 1331 drives the vibrating block 134 to move up and down 141 along the guide groove through the material sliding table 131, so as to ensure that the stroke of each movement of the vibrating block 134 is the same, the raw materials can be stacked up and down and leveled;

after the rack 2021 is moved by the driving wheel 203 so that the second pushing piece 2022 contacts the first pushing piece 13322, the second pushing piece 2022 and the material supporting piece 1332 are driven by the first pushing piece 13322 to compress the thrust spring 1333 and gradually enter the accommodating frame 1331, so that the raw materials stacked beyond the two side portions of the material supporting piece 1332 gradually transition into the material clamping groove 20231, the middle of the bottom of the raw materials is supported by the gasket 20233, and then the clamping plate 20232 is driven by the power separately arranged at the bottom of the clamping plate 20232 to rotate, so as to clamp the raw materials in the material clamping groove 20231, thereby achieving the effect of enabling the raw materials to be gently transitioned from the stacking area to the material conveying area.

As a refinement, the blanking unit 3 comprises:

a blanking table (301);

a support (302), wherein the support (302) is connected to the inner bottom of the blanking table (301);

the pre-pressing assembly (303), the pre-pressing assembly (303) is arranged inside the blanking table (301);

the material cutting assembly (304), the material cutting assembly (304) is arranged at the lower part of the pre-pressing assembly (303);

the pushing and rotating mechanism (305), the pushing and rotating mechanism (305) is arranged at the discharging end of the blanking table (301);

a guide table (3021) is connected to the upper side part of the support piece (302);

the pre-pressing assembly (303) comprises:

the air cylinder (3031), the air cylinder (3031) penetrates through the upper part of the blanking table (301);

the pressure plate (3032) is connected to the lower end of the air cylinder (3031);

the two groups of guide plates (3033) are symmetrically connected to the lower end of the pressure plate (3032);

the inner pressing piece (3034) is connected to the inner side of the guide plate (3033) in a sliding mode;

the inner pressure part 3034 is arranged in a U shape, the inner pressure part 3034 is connected with the guide plate 3033 in a sliding way, and the upper end of the inner pressure part 3034 is pressed against the top of the inner groove of the guide plate 3033 through a first adjusting spring 30342;

a first guide member 30341 connected with the pressure plate 3032 in a sliding manner is inserted into the first adjusting spring 30342;

further, the material cutting assembly (304) comprises: a mounting plate (3041); a punching needle (3042), the punching needle (3042) being slidably connected to the mounting plate (3041); a support pillar (3043), wherein the support pillar (3043) is connected with the upper end of the mounting plate (3041);

the lower end of the mounting plate (3041) is connected with a cutter (30411);

the plane of the upper end of the punching needle 3042 is higher than the plane of the upper end of the limit ring 30432; the punching needle 3042 is slidably connected to the mounting plate 3041;

a third adjusting spring 30431 is slidably sleeved outside the pillar 3043 and between the limit ring 30432 and the guide table 3021;

It should be noted that, in the blanking process, the internal pressure part 3034 compresses the aligned vest bags at the arrangement unit 1 through the initial pressure process, and then the punching process is started first and then the trimming process is started, which is different from the existing punching and trimming processes, in synchronization, in the invention, after punching, the punching needle 3042 is still in the stacked vest bags to position the trimming process in advance, so that the situation that when the stacked thicker vest bags are trimmed, the stacked vest bags in the middle are positioned only by adopting the upper end extrusion mode, and the stacked vest bags in the middle slide relatively to cause the defect of larger deviation in the trimming process is prevented;

in addition, in the return process of the blanking process, the air cylinder 3031 drives the pressure plate 3032 to move upwards, because the height of the spacing ring 30432 in the horizontal direction is lower than that of the punching pin 3042, the pressure plate 3032 firstly disengages from the upper end of the spacing ring 30432, the third adjusting spring 30431 resets and pushes the spacing ring 30432 to move upwards by means of the guide table 3021, the spacing ring 30432 drives the mounting plate 3041 provided with the cutter 30411 to move upwards by the pillar 3043, then the pressure plate 3032 disengages from the plane on which the upper end of the punching pin 3042 is located, the second adjusting spring 30421 pushes the limit block 30422 to move upwards by means of the reverse acting force of the guide table 3021, the limit block 30422 pushes the punching pin 3042 to move upwards, so that the punching pin 3042 disengages from the punching position of the back core bag, finally, the air cylinder 3031 continues to move upwards and drives the guide plate 3033 to move upwards by means of the pressure plate 3032, so that the internal pressure plate 3034 disengages from the surface of the back core bag, and a gradual return process is ensured that the return knife 30411 with the largest relative friction force with the back core bag, the inner pressure piece 3034 and the punching needle 3042 can ensure that the vest bag is kept flush as a whole, and then, when the punching needle 3042 returns, the inner pressure piece 3034 keeps a pressure state to prevent the slight friction between the punching needle 3042 and the vest bag from causing the separation of the vest bag, and the inner pressure piece 3034 and the last return stroke are because the inner pressure piece 3034 only presses on the upper surface of the vest bag, so that no friction force is generated between the inner pressure piece 3034 and the vest bag, and the vest bag cannot be taken out when the inner pressure piece 3034 separates from the vest bag.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The production method of the biodegradable plastic bag is characterized by comprising the following steps of:

step one, a feeding process, wherein raw materials are continuously fed into an arrangement unit (1) through a transmission roller along a feeding unit (4);

step two, a cutting and arranging procedure, namely, the raw materials entering the arranging unit (1) are subjected to lateral alignment through a centering mechanism (132), and then a transmission assembly (11) synchronously drives a first eccentric part (111), a second eccentric part (112) and a third eccentric part (113) which are arranged at a certain angle to sequentially perform cutting, pressing and pressing;

step three, a transportation procedure, namely moving the material conveying unit (2) to the bottom of the arranging unit (1) from the blanking unit (3) along the guide mechanism (201) and transporting the arranged and orderly stacked vest bags to the blanking unit (3) from the material sliding table (131) through the material clamping mechanism (2023);

a blanking process, in the process that the material conveying unit (2) enters the blanking unit (3), the material clamping mechanism (2023) is turned over by the pushing and rotating mechanism (305) until the bag surface of the vest is parallel to the plane where the blanking table (301) is located, then the prepressing assembly (303) moves downwards to prepress the vest bag, then the punching needle (3042) punches a hole, and finally the surface is cut by the cutter (30411);

the cutting and arranging process includes:

side alignment procedure: raw materials continuously enter the arrangement unit (1) and slide down to be in contact with the material supporting sheet (1332) along the centering mechanisms (132) arranged at the two sides of the material sliding table (131);

a cutting step: when the bottom of the raw material is contacted with the supporting piece (1332) every time, the second eccentric piece (112) rotates to drive the cutter (1226) to cut off the raw material;

the blanking process includes:

an initial pressing procedure: the air cylinder (3031) drives the pressure plate (3032) to move downwards, the pressure plate (3032) drives the inner pressing piece (3034) to move downwards through the guide plate (3033), so that the periphery of the end face of the raw material is pressed against by the inner pressing piece (3034);

a punching procedure: the pressure plate (3032) continues to move downwards and pushes the punching needle (3042) to punch holes on the folded raw materials;

a trimming procedure: after punching is finished, the pressure plate (3032) still moves downwards and pushes the limiting ring (30432) to move downwards, the limiting ring (30432) drives the mounting plate (3041) to move downwards through the support column (3043), and a cutter (30411) connected to the lower end of the mounting plate (3041) is prompted to cut the raw material.

2. The method for producing biodegradable plastic bags according to claim 1, wherein the cutting process comprises:

a pressing procedure: the cut raw materials lean against the lower part of the sliding table (131) in a sheet-shaped inclined manner, the main shaft (110) drives the second lifting rod (1232) to move downwards through the third eccentric part (113), and the second lifting rod (1232) flattens the lower part of the raw materials downwards through the second flattening part (1234) and the troweling part (1235);

a pressing procedure: the main shaft (110) synchronously drives the first eccentric part (111) to rotate, and the first eccentric part (111) drives the first flattening part (1214) to move downwards through the lifting plate (1222) so as to flatten the upper part of the raw material.

3. The method for producing biodegradable plastic bags according to claim 1, wherein the transporting step comprises:

the process comprises the following steps: the rack (2021) moves to the arrangement unit (1) along the guide mechanism (201), contacts with the lifting wheel (13312) through a tooth part and drives the lifting wheel (13312) to reciprocate up and down, the lifting wheel (13312) drives the containing frame (1331) to move up and down through the supporting rod (13311), and the containing frame (1331) drives the cut raw materials to bump up and down through the supporting piece (1332);

a transfer process: the rack (2021) drives the first pushing piece (13322) to move through the second pushing piece (2022), the first pushing piece (13322) pushes the material supporting piece (1332) to compress the pushing spring (1333) and enter the accommodating frame (1331), the raw materials stacked on the material supporting piece (1332) enter a plane where the material clamping groove (20231) and the gasket (20233) are located, and then the material clamping mechanism (2023) feeds the raw materials to the blanking unit (3).

4. The method for producing biodegradable plastic bags according to claim 3, wherein a torsion spring is arranged at the connection of the clamping mechanism (2023) and the rack (2021), the clamping mechanism (2023) moves to the blanking unit (3), and the pushing and rotating mechanism (305) generates a reverse pushing force on the clamping mechanism (2023) to turn over the clamping mechanism (2023) so that the side surface of the raw material is flush with the plane of the blanking table (301).

5. A method for producing biodegradable plastic bags according to claim 3, characterized in that the second pushing element (2022) is located between the clamping mechanism (2023) and the first pushing element (13322), and the height of the second pushing element (2022) is lower than the plane of the gasket (20233).

6. The method for producing biodegradable plastic bags according to claim 1, wherein the blanking process further comprises:

a return process: after the raw materials are cut and molded, the air cylinder (3031) drives the pressure plate (3032) to move upwards, and the cut-off knife (30411), the punching needle (3042) and the inner pressing piece (3034) sequentially return.

7. A method for producing biodegradable plastic bags according to claim 1, wherein said guide plate (3033) is provided with a groove inside for receiving the inner pressing member (3034), and the width of the groove is smaller than the width of the inner pressing member (3034);

the inner pressing piece (3034) is arranged in a U shape, the inner pressing piece (3034) is connected with the guide plate (3033) in a sliding mode, and the upper end of the inner pressing piece (3034) is pressed against the top of the inner groove of the guide plate (3033) through a first adjusting spring (30342).

8. The method for producing biodegradable plastic bags according to claim 1, wherein the plane on which the upper end of the punching needle (3042) is located is higher than the plane on which the upper end of the spacing ring (30432) is located; the punching needle (3042) is connected with the mounting plate (3041) in a sliding manner.