阅读说明：本技术 一种环保食品袋及其加工工艺 (Environment-friendly food bag and processing technology thereof ) 是由 廖振清 于 2020-11-10 设计创作，主要内容包括：本发明公开了一种环保食品袋及其加工工艺,由三层薄膜通过共挤成膜,分为外层、中层和内层,所述外层为均聚聚丙烯层,中层为共聚聚丙烯层,内层为复合层；本发明在传统组分中加入有改性玉米粉,制备的薄膜成型性好,光泽度好,软硬适中,耐酸碱、抗腐蚀、易回收,是一种新型绿色环保材料,通过该加工工艺生产的方式将有效提高了生产效率有效的填补了市面上常用的pvc膜存在的各种不足,对环境起到了良好的保护作用；工艺方式简单安全,具备良好的前景,对环境保护良好,保证了内装食物的安全。(The invention discloses an environment-friendly food bag and a processing technology thereof.A film is formed by three layers of films through coextrusion and is divided into an outer layer, a middle layer and an inner layer, wherein the outer layer is a homo-polypropylene layer, the middle layer is a co-polypropylene layer, and the inner layer is a composite layer; according to the invention, the modified corn flour is added into the traditional components, so that the prepared film has good formability, good glossiness, moderate hardness, acid and alkali resistance, corrosion resistance and easy recovery, is a novel green environment-friendly material, effectively improves the production efficiency by adopting the processing technology production mode, effectively fills various defects of the common PVC film on the market, and plays a good role in protecting the environment; the process is simple and safe, has good prospect, protects the environment well, and ensures the safety of food filled in the container.)

1. An environmental protection food bag which is characterized in that: the environment-friendly food bag is formed by three layers of films through co-extrusion and is divided into an outer layer, a middle layer and an inner layer, wherein the outer layer is a homo-polypropylene layer, the middle layer is a co-polypropylene layer, and the inner layer is a composite layer; the method is characterized in that: the composite layer is prepared from the following components in parts by weight: 20 parts of polyvinyl chloride, 15 parts of adhesive resin, 0.5 part of antioxidant, 2 parts of oxidized polyethylene, 2 parts of ethyl acetate, 2 parts of metallocene polyethylene, 1.5 parts of methyl methacrylate, 1.5 parts of epoxidized soybean oil, 1.5 parts of cyclohexanone, 5 parts of modified corn flour, 1.5 parts of sierozem powder, 2 parts of carbon fiber, 2 parts of bamboo fiber, 1.5 parts of sepiolite wool, 2 parts of aluminum sulfate and 2 parts of spider silk-like fiber; during preparation, the components are fed into a kneader to be mixed uniformly, and are treated for 6 hours at 150 ℃ to prepare the composite rubber material.

2. A process for manufacturing the eco-friendly food bag as set forth in claim 1, wherein: the method comprises the following steps: 1) Respectively mixing the homo-polypropylene and the co-polypropylene which form the outer layer and the middle layer to form a homo-polypropylene layer material and a co-polypropylene layer material; 2) Extruding a homo-polypropylene layer material, a co-polypropylene layer material and a composite rubber material through a T-shaped die; 3) Cooling the extruded film by a cooling roller, drawing and stretching, measuring the thickness, performing surface corona treatment, cutting edges, winding to form a film and inspecting; 4) Placing the material roll into a packaging bag edge sealing device, so as to spray and color the material roll and seal edges of the packaging bag; 5) The packaging bags which are finished with the colors and the edge sealing are stored and put in storage; the edge sealing device for the packaging bag in the step 4) comprises a base (1), a constant-speed feeding structure (2) arranged on one side of the base, a vertical plate (11) arranged on the base, a first roller shaft (12) with two ends fixedly connected with the vertical plate, a first roller body (13) sleeved on the first roller shaft, a convex tooth (14) arranged on the first roller body, a first motor (15) used for driving the first roller body, a first stand column (16) arranged on the first roller shaft, an edge pressing wheel (17) sleeved on the first stand column and used for pressing a film out of dents, a coloring roller (18) arranged on the vertical plate, a cooling block (19) arranged on one side of the coloring roller, an auxiliary structure (3) used for deepening the dents, an edge sealing structure (4) used for sealing the film, and a cutter (110) used for cutting the plastic bag; put into the film in the pay-off structure at the uniform velocity, thereby carry out the at the uniform velocity output of film, the film will be around locating on first roll body, first roll body receives the drive of first motor through the dogtooth, thereby rotate, first roll body will play the effect of carrying the film at the pivoted in-process, meanwhile herein, the edging wheel that the cover was located on first stand will cooperate with between the first roll body, the drive that receives first roll body rotates in step, and make the both ends of film produce a crease, and deepen the degree of depth of crease under the effect of auxiliary structure, guarantee the definition of crease, will color through last look roller along with the film, and quick drying stereotypes under the effect of cooling block, and the banding that packs is handled in finally getting into the banding structure.

3. The environment-friendly food bag and the processing technology thereof as claimed in claim 2, wherein: the uniform-speed feeding structure (2) comprises a first support (21) arranged on one side of the base, a first sliding chute (22) arranged on the first support, a placing groove (23) arranged at the bottom of the first sliding chute, a material roller (24) with two ends arranged in the placing groove, a feeding hole (25) formed in the side wall of the first sliding chute, a first sliding block (26) capable of moving back and forth in the first sliding chute, an extrusion roller (27) with two ends rotatably penetrating through the first sliding block, and a second motor (28) arranged on the first sliding block and used for driving the extrusion roller; lift first slider upwards, put into first spout through the feed inlet with the material roller afterwards, and place material roller material both ends on the standing groove, loosen the lifting to first slider afterwards, first slider will descend with the squeeze roll together, extrude the top of material roller afterwards, rotate through the second motor afterwards, can drive the material roller and rotate, thereby output film, the output speed of film and the rotational speed of squeeze roll, the rotational speed of second motor is relevant promptly, it is irrelevant with material roller volume.

4. The environment-friendly food bag and the processing technology thereof as claimed in claim 2, wherein: the auxiliary structure (3) comprises a first guide roller (31), a second guide roller (32) and a third guide roller (33), two ends of the first guide roller, the second guide roller and the third guide roller are rotatably connected to the vertical plate, a fixed block (34) fixedly connected to the vertical plate, a second roller shaft (35) arranged on the fixed block, a second roller body (36) sleeved on the second roller shaft, a second support (37) arranged on the fixed block, and a reset roller (38) rotatably arranged on the support; receive the film after the extrusion of blank pressing wheel, will be preferred to be walked around first guide roll, pass through second guide roll and third guide roll afterwards, because the position that the second guide roll set up is located the top of first guide roll, opposite direction with the perk of blank pressing, thereby after the film is walked around first guide roll, the blank pressing will be folded with the film body, the marginal portion of both sides is inwards folded promptly, and carry out further extrusion to the folding department under the effect of second guide roll, thereby deepen the indentation, will pass through the guide effect of third guide roll afterwards, on the second roll body is led to the film, and the blank pressing cover is located on the roller that resets, thereby turn over the blank pressing and open, the perk, get into the step of coloring afterwards.

5. The environment-friendly food bag and the processing technology thereof as claimed in claim 1, wherein: the preparation method of the modified corn flour comprises the following steps: 1) Fresh mature corns are used as raw materials, the moisture content of the corns is more than 60%, and the corns are subjected to impurity removal and cleaning; 2) Sending the washed mixture into a rolling and kneading machine for rolling and kneading treatment; 3) Juicing the rolled and kneaded corns, and collecting corn juice; 4) Placing the corn juice in a vacuum environment for spray drying, and controlling the temperature to be 25-30 ℃; 5) Grinding into powder, and storing.

6. The environment-friendly food bag and the processing technology thereof as claimed in claim 5, wherein: the rolling treatment in the step 2 is that the rolling is performed once every 5 minutes, the rolling is performed for 5 minutes after the vacuum pumping is completed each time, then the vacuum is discharged, and the process is circulated for 3 times; .

7. The environment-friendly food bag and the processing technology thereof as claimed in claim 2, wherein: the edge sealing structure (4) comprises a channel (41) arranged on a base, a bending rail (42) arranged on the base, a fan (43) arranged on the base, a groove (44) arranged at the top of the channel, a lug (45) arranged at the tail end of the bending rail, a first roller (46) arranged in the lug, a third motor (47) used for driving the first roller to rotate, a plurality of driving wheels (48) arranged on the side wall of the groove, heating wheels (49) arranged between the driving wheels, a cooling wheel (410) used for rapidly cooling and an extrusion structure (5) arranged at the tail end of the channel; the blank pressing machine is characterized in that after the blank pressing is turned up, a film moves through a bending track, the film is curled to be annular in a horizontal form gradually in the moving process, blank pressing at two ends of the film are in mutual contact, the blank pressing is extruded by a first roller under the driving of a third motor to feed materials into a channel, a fan provides wind of a certain degree at the moment, the film can be better attached to the inner wall of the channel, the film is conveyed and moved, the blank pressing of the film is always in an attaching state under the action of a driving wheel, the film passes through a heating wheel and is heated, the films on two sides are fused, the film is sealed, the film forms a cylindrical structure, and then the film is rapidly cooled through a cooling wheel and is reinforced.

8. The environment-friendly food bag and the processing technology thereof as claimed in claim 7, wherein: the extrusion structure (5) comprises a first cavity (51) arranged below the channel, a sliding rod (52) arranged in the first cavity, a second sliding block (53) capable of moving back and forth on the sliding rod, a second cavity (54) arranged on the second sliding block, roller groups (55) which are rotatably connected in the second cavity and are increased one by one along the axial direction of the channel, a sliding track (56) arranged on the base, a rotating ring (57) capable of moving on the sliding track, an extension block (571) arranged on the rotating ring, a plurality of groups of power rollers (58) arranged on the extension block in a pairwise opposite mode, edge sealing rollers (59) arranged between the power groups, a linkage structure (6) for switching the processing mode and a fixed edge sealing structure (7) for stabilizing the package; after the edge pressing and edge sealing are finished, the film is gradually formed into a flat shape from small to large through the roller group, the film is finally clamped and conveyed under the extrusion of the power roller, the film is kept flat through good clamping of the power roller in the conveying process, the film is subjected to sectional type edge sealing under the action of the edge sealing roller, and then the edge sealing positions are separated through the cutter to form individual packaging bags.

9. The environment-friendly food bag and the processing technology thereof as claimed in claim 8, wherein: the linkage structure (6) comprises a third cavity (61) arranged on the side wall of the first cavity, a rack (62) arranged on the second sliding block and capable of moving back and forth in the third cavity, a gear (63) arranged in the third cavity and used for linking the rack, and a connecting block (64) used for connecting the second sliding block and the rotating ring; when processing different types of wrapping bags, through rotating the change to the drive removes through the second slider that the connecting block links to each other, and drives the rack and remove in the third cavity, will drive another piece through the transmission of rack through the gear and carry out reverse removal with the second slider that the change links to each other, and the power roller will rotate certain angle this moment and be the horizontality for process other types's wrapping bags.

10. The environment-friendly food bag and the processing technology thereof as claimed in claim 8, wherein: the fixed edge sealing structure (7) comprises a second upright post (71) arranged on the extension block, a clamping block (72) arranged on the second upright post, a clamping roller (73) arranged on the clamping block, a first magnetic block (74) arranged on the clamping block, a third upright post (75) arranged on the extension block, a second magnetic block (76) arranged on the third upright post, an edge sealing wheel (77) arranged on the third upright post and used for sealing edges, and metal balls (78) corresponding to the first magnetic block and the second magnetic block; when the film passes through the power roller, the metal ball is placed in the inner wall of the cylindrical film in advance, the metal ball moves towards two sides under the magnetic force action of the first magnetic block and the second magnetic block at the moment, so that straightening is performed, the edge pressing is clamped by the clamping roller and moves, the other end of the edge pressing is positioned at the clamping position of the edge sealing wheel, the position of the film corresponding to the edge pressing is tensioned downwards due to the attraction of the second magnetic block to the metal ball, and then the edge sealing wheel seals the edge of the film above the metal ball.

Technical Field

The invention belongs to the technical field of food packaging, and particularly relates to an environment-friendly food bag and a processing technology thereof.

Background

In recent decades, the production and application of Chinese plastic flexible packaging films have been rapidly developed, but the problem that the plastic films used for food packaging may harm human health is not paid enough attention, and recently, PVC preservative films which are concerned all over the country are a good example of possible carcinogenic events. In China, the PVC film is used in candy twist packages and snack food twist packages in a large amount besides preservative films. The kinking package of candies and small foods is that the PVC kinking film directly contacts with the foods, and meanwhile, the consumer groups mainly comprise children and teenagers, so the problem that the PVC kinking film can harm human health is also paid attention to in all aspects of society.

The memory tangle film commonly seen in the market at present mainly comprises a PVC film and a PET film. PVC films are forbidden to be used in food packaging in developed countries in Europe and America, and PETG and Biaxially Oriented Polystyrene (BOPS) films are used as substitutes, but China has no plaintext to forbid the use of PVC packaging films, but with the increasing improvement of environmental requirements, the development of novel green products for replacing PVC packaging films is a fundamental way for the environmental requirements.

Meanwhile, in the production and manufacturing process of the package, the package needs to be subjected to color printing and other treatments, the two pieces of packages are generally aligned to be butted with each other after the color printing is finished, and then the edge sealing treatment is carried out.

Disclosure of Invention

The invention provides an environment-friendly food bag which reduces waste, has good product quality and protects the environment and a processing technology thereof in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: an environment-friendly food bag is formed by three layers of films through coextrusion, and is divided into an outer layer, a middle layer and an inner layer, wherein the outer layer is a homo-polypropylene layer, the middle layer is a co-polypropylene layer, and the inner layer is a composite layer; the composite layer is prepared from the following components in parts by weight: 20 parts of polyvinyl chloride, 15 parts of adhesive resin, 0.5 part of antioxidant, 2 parts of oxidized polyethylene, 2 parts of ethyl acetate, 2 parts of metallocene polyethylene, 1.5 parts of methyl methacrylate, 1.5 parts of epoxidized soybean oil, 1.5 parts of cyclohexanone, 5 parts of modified corn flour, 1.5 parts of sierozem powder, 2 parts of carbon fiber, 2 parts of bamboo fiber, 1.5 parts of sepiolite wool, 2 parts of aluminum sulfate and 2 parts of spider silk-like fiber; during preparation, the components are fed into a kneader to be mixed uniformly, and are treated for 6 hours at 150 ℃ to prepare the composite rubber material.

The method comprises the following steps: 1) Respectively mixing the homo-polypropylene and the co-polypropylene which form the outer layer and the middle layer to form a homo-polypropylene layer material and a co-polypropylene layer material; 2) Extruding a homo-polypropylene layer material, a co-polypropylene layer material and a composite rubber material through a T-shaped die; 3) Cooling the extruded film by a cooling roller, drawing and stretching, measuring the thickness, performing surface corona treatment, cutting edges, winding to form a film and inspecting; 4) Placing the material roll into a packaging bag edge sealing device, so as to spray and color the material roll and seal edges of the packaging bag; 5) The packaging bags which are finished with the colors and the edge sealing are stored and put in storage; the edge sealing equipment for the packaging bag in the step 4) comprises a base, a constant-speed feeding structure arranged on one side of the base, a vertical plate arranged on the base, a first roller shaft with two ends fixedly connected with the vertical plate, a first roller body sleeved on the first roller shaft, a convex tooth arranged on the first roller body, a first motor used for driving the first roller body, a first stand column arranged on the first roller shaft, an edge pressing wheel sleeved on the first stand column and used for pressing a film into dents, a coloring roller arranged on the vertical plate, a cooling block arranged on one side of the coloring roller, an auxiliary structure used for deepening the dents, an edge sealing structure used for sealing the film, and a cutter used for cutting the plastic bag subjected to edge sealing; the film is placed into a constant-speed feeding structure, so that the film is output at a constant speed, the film is wound on a first roller body, the first roller body is driven by a first motor through convex teeth and rotates, the first roller body plays a role in conveying the film in the rotating process, meanwhile, an edge pressing wheel sleeved on a first stand column is matched with the first roller body and synchronously rotates under the driving of the first roller body, two ends of the film are enabled to generate a crease, the depth of the crease is deepened under the action of an auxiliary structure, the definition of the crease is ensured, the film is colored through a coloring roller along with the film, and the film is quickly dried and shaped under the action of a cooling block and finally enters an edge sealing structure for packaging edge sealing treatment; through the mode that is provided with the indentation in advance, played good locate function to subsequent color printing to through the mode of blank pressing, confirmed the banding position in advance, and here with positive and negative with printing on a film, the alignment problem of positive and negative when effectively having guaranteed follow-up banding, thereby effectively avoided the extravagant problem of damaging the environment of raw materials that positive and negative dislocation leads to, effectively fully utilized to raw and other materials.

The uniform-speed feeding structure comprises a first support arranged on one side of the base, a first sliding chute arranged on the first support, a placing groove arranged at the bottom of the first sliding chute, a material roller with two ends arranged in the placing groove, a feeding hole formed in the side wall of the first sliding chute, a first sliding block capable of moving back and forth in the first sliding chute, a squeezing roller with two ends rotatably penetrating through the first sliding block, and a second motor arranged on the first sliding block and used for driving the squeezing roller; the first sliding block is lifted upwards, the material roller is placed into the first sliding groove through the feeding hole, two ends of the material roller are placed on the placing groove, then the first sliding block is lifted up and is lowered together with the extrusion roller, then the uppermost end of the material roller is extruded, and then the material roller can be driven to rotate through the rotation of the second motor, so that a film is output, wherein the output speed of the film is related to the rotating speed of the extrusion roller, namely the rotating speed of the second motor and is unrelated to the volume of the material roller; through the setting of feed inlet, effectively made things convenient for getting of material roller to put the flow, place the material roller behind the standing groove, the extrusion through the squeeze roll this moment, make the material roller rotate passively, this in-process, the speed of the ejection of compact is relevant with the rotation of first motor, then the stability of the ejection of compact has been guaranteed, the weight of squeeze roll will also effectively extrude the material roller simultaneously, thereby the rocking of material roller has been reduced, the steady at the uniform velocity ejection of compact will effectively guarantee to take place folding crooked condition emergence between the follow-up course of working in the film, thereby effectively guaranteed the film in the follow-up integrality of the in-process surface of coloring, thereby the quality of wrapping bag has been guaranteed, the extravagant condition of having reduced takes place, effectively assisted the protection of environment.

The auxiliary structure comprises a first guide roller, a second guide roller and a third guide roller, two ends of which are rotatably connected to the vertical plate, a fixed block fixedly connected to the vertical plate, a second roller shaft arranged on the fixed block, a second roller body sleeved on the second roller shaft, a second support arranged on the fixed block, and a reset roller rotatably arranged on the support; the film extruded by the edge pressing wheel preferentially bypasses the first guide roller and then passes through the second guide roller and the third guide roller, the second guide roller is arranged above the first guide roller, and the direction of the edge pressing and the tilting are opposite, so that after the film bypasses the first guide roller, the edge pressing and the film body are folded, namely edge parts on two sides are folded inwards, the folded part is further extruded under the action of the second guide roller, the indentation is deepened, then the film is guided to the second roller body under the guiding action of the third guide roller, the edge pressing is sleeved on the reset roller, and the edge pressing is turned over and tilted and then enters the coloring step; through the cooperation between first roller and the second roller, thereby first roller turns over the blank pressing and turns over, and the second roller then extrudees the blank pressing, the effect of third roller is then the buffering, the roller that resets of being convenient for spreads out the blank pressing, reduce and spread out the possibility that in-process blank pressing received the damage, reduced damage and waste to raw and other materials, effectively with the deepening of indentation through setting up of this structure simultaneously, thereby made things convenient for subsequent alignment and subsequent banding of coloring more, thereby guaranteed the final quality of product.

The preparation method of the modified corn flour comprises the following steps: 1) Fresh mature corns are used as raw materials, the moisture content of the corns is more than 60%, and the corns are subjected to impurity removal and cleaning; 2) Sending the washed mixture into a rolling and kneading machine for rolling and kneading treatment; 3) Juicing the rolled and kneaded corns, and collecting corn juice; 4) Placing the corn juice in a vacuum environment for spray drying, and controlling the temperature to be 25-30 ℃; 5) Grinding into powder, and storing.

The rolling treatment in the step 2 is that the rolling is performed once every 5 minutes, the rolling is performed for 5 minutes after the vacuum pumping is completed each time, then the vacuum is discharged, and the process is circulated for 3 times; .

The edge sealing structure comprises a channel arranged on the base, a bending rail arranged on the base, a fan arranged on the base, a groove arranged at the top of the channel, a lug arranged at the tail end of the bending rail, a first roller arranged in the lug, a third motor used for driving the first roller to rotate, a plurality of driving wheels arranged on the side wall of the groove, heating wheels arranged among the driving wheels, cooling wheels used for rapidly cooling and an extrusion structure arranged at the tail end of the channel; after the blank pressing is turned up, the film moves through the bending track, the film is gradually curled into a ring shape in a horizontal shape in the moving process, the blank pressing at two ends of the film are in mutual contact, the blank pressing is extruded by a first roller under the driving of a third motor to feed materials into the channel, at the moment, a fan provides air to a certain degree, so that the film can be better attached to the inner wall of the channel to be conveyed and moved, the blank pressing of the film is always in an attaching state under the action of a driving wheel, and the film at two sides is heated when passing through a heating wheel, so that the films at two sides are fused, the films are sealed, the films form a cylindrical structure, and then the films are rapidly cooled through a cooling wheel to be reinforced; through the setting of this structure, it is cylindric to buckle the film from the horizontality originally, and carry out the banding with the blank holder, alignment between the packing positive and negative will effectively be guaranteed to this in-process, effectively avoided the dislocation condition between the positive and negative to take place, the form through the fan will effectively generate certain pressure to the film simultaneously, thereby make the film laminate in the passageway inner wall more, alignment between the blank holder has effectively been guaranteed on the one hand, on the other hand, effectively reduced and produced the fold between the film, the condition of the adhesion of each other between the film of having avoided the result in of static simultaneously takes place, thereby effectively guaranteed the quality of film, thereby the quantity of waste product has been reduced, waste is reduced, the utilization ratio of raw and other materials is improved, thereby the environment has effectively been protected.

The extrusion structure comprises a first cavity arranged below the channel, a sliding rod arranged in the first cavity, a second sliding block capable of moving back and forth on the sliding rod, a second cavity arranged on the second sliding block, roller groups which are rotatably connected in the second cavity and are increased one by one along the axial direction of the channel, a sliding track arranged on the base, a swivel capable of moving on the sliding track, an extension block arranged on the swivel, a plurality of groups of power rollers arranged on the extension block in a pairwise opposite mode, edge sealing rollers arranged between the power groups, a linkage structure for switching processing modes and a fixed edge sealing structure for stabilizing packaging; after edge pressing and edge sealing are finished, gradually integrating the film into a flat shape through a roller group from small to large, finally clamping and conveying the film under extrusion of a power roller, keeping the film flat through good clamping of the power roller in the conveying process, performing sectional edge sealing on the film under the action of an edge sealing roller, and then separating the edge sealing positions through a cutter to form individual packaging bags; through the setting of wheel train to extrude the film, thereby flatten the film and cushion, avoid the too big condition emergence that causes of range of flattening fold, range upon range of between the film to lead to the film finally to take place the condition emergence that the dislocation took place, thereby lead to the waste of subsequent raw materials, protected the environment. Simultaneously, through the position of adjusting second slider and change, can adjust the extrusion direction of film, all possess good suitability to different types of food package this moment.

The linkage structure comprises a third cavity arranged on the side wall of the first cavity, a rack arranged on the second sliding block and capable of moving back and forth in the third cavity, a gear arranged in the third cavity and used for linking the rack, and a connecting block used for connecting the second sliding block and the rotating ring; when different types of packaging bags are processed, the second sliding block connected through the connecting block is driven to move by rotating the rotating ring, the rack is driven to move in the third cavity, the other second sliding block which is not connected with the rotating ring is driven to move reversely by the rack through the transmission of the gear, and at the moment, the power roller rotates by a certain angle to be in a horizontal state and is used for processing other types of packaging bags; the mode switching can be completed only by adjusting the rotating ring, the smoothness of equipment operation is effectively guaranteed through the arrangement of the structure, the switching between the modes is facilitated, the various types of packages are well adaptive to processing, meanwhile, the arrangement of the structure can be switched in the processing process, the machine is not required to be stopped completely, the types can be switched only by adjusting the positions of the coloring roller and the rotating ring, and the processing efficiency of the equipment is effectively improved.

The fixed edge sealing structure comprises a second upright column arranged on the extension block, a clamping block arranged on the second upright column, a clamping roller arranged on the clamping block, a first magnetic block arranged on the clamping block, a third upright column arranged on the extension block, a second magnetic block arranged on the third upright column, an edge sealing wheel arranged on the third upright column and used for sealing an edge, and metal balls corresponding to the first magnetic block and the second magnetic block; when the film passes through the power roller, the metal balls are placed in the inner wall of the cylindrical film in advance, the metal balls move towards two sides under the magnetic force action of the first magnetic block and the second magnetic block so as to be straightened, the edge pressing wheel is clamped by the clamping roller and moves, the other end of the edge pressing wheel is positioned at the clamping position of the edge sealing wheel, the position of the film corresponding to the edge pressing wheel is tensioned downwards due to the attraction of the second magnetic block to the metal balls, the edge sealing wheel is used for sealing the film above the metal balls, and if the edge sealing is not required, the metal balls can be turned into an element with the same function as the clamping roller by closing the electrification of the edge sealing wheel; here through the appeal between metal ball and first magnetic material and the second magnetic material, thereby fix a position the both ends of film, thereby the metal ball of top receives the influence of first magnetic material and pushes blank holder department to in the grip roller, thereby the stability of centre gripping has been guaranteed, the magnetic material of below then receives the attraction under the effect of second magnetic material, make the film carry out the banding by the blank holder wheel, moreover, the steam generator is simple in structure, and is effective, the stability of equipment has been guaranteed simultaneously, thereby the accuracy of the position of banding has been guaranteed, thereby the correspondence of positive and negative pattern has been guaranteed, the quality of product has been guaranteed, waste is reduced.

The invention effectively improves the production efficiency by the production mode of the processing technology, effectively fills various defects of the common PVC film on the market, and plays a good role in protecting the environment; the process is simple and safe, has good prospect, protects the environment well, and ensures the safety of food filled in the container.

According to the invention, the indentation is arranged in advance, so that a good positioning effect is achieved for subsequent color printing, the edge sealing position is determined in advance in an edge pressing manner, and the front side and the back side are printed on one film, so that the alignment problem of the front side and the back side during subsequent edge sealing is effectively ensured, the problem of environment damage caused by raw material waste due to dislocation of the front side and the back side is effectively avoided, and the raw material is effectively and fully utilized.

Drawings

Fig. 1 is a first structural schematic diagram of the present invention.

Fig. 2 is a second structural schematic diagram of the present invention.

Fig. 3 is a left side view of the present invention.

Fig. 4 is a schematic perspective cross-sectional view taken along line a-a of fig. 3.

Fig. 5 is a partially enlarged schematic view of fig. 4.

Fig. 6 is a perspective cross-sectional view of fig. 3 taken along line B-B.

Fig. 7 is a partially enlarged schematic view of fig. 6.

Fig. 8 is an enlarged schematic view at a in fig. 7.

Fig. 9 is an enlarged schematic view at B in fig. 7.

Fig. 10 is an enlarged schematic view at C in fig. 7.

Fig. 11 is a front view of the present invention.

Fig. 12 is a perspective cross-sectional view of fig. 11 taken along line C-C.

Fig. 13 is a partially enlarged schematic view of fig. 12.

Fig. 14 is a schematic view of a part of the fixing sealing structure in operation.

Fig. 15 is a schematic plan sectional view taken along line D-D of fig. 11.

Fig. 16 is a partially enlarged schematic view of fig. 2.

Detailed Description

As shown in fig. 1-16, an environment-friendly food bag is formed by co-extruding three films into a film, which is divided into an outer layer, a middle layer and an inner layer, wherein the outer layer is a homo-polypropylene layer, the middle layer is a co-polypropylene layer, and the inner layer is a composite layer; the composite layer is prepared from the following components in parts by weight: 20 parts of polyvinyl chloride, 15 parts of adhesive resin, 0.5 part of antioxidant, 2 parts of oxidized polyethylene, 2 parts of ethyl acetate, 2 parts of metallocene polyethylene, 1.5 parts of methyl methacrylate, 1.5 parts of epoxidized soybean oil, 1.5 parts of cyclohexanone, 5 parts of modified corn flour, 1.5 parts of sierozem powder, 2 parts of carbon fiber, 2 parts of bamboo fiber, 1.5 parts of sepiolite wool, 2 parts of aluminum sulfate and 2 parts of spider silk-like fiber; during preparation, the components are fed into a kneader to be mixed uniformly, and are treated for 6 hours at 150 ℃ to prepare the composite rubber material.

A process for manufacturing the eco-friendly food bag as set forth in claim 1, comprising the steps of: 1) Respectively mixing the homo-polypropylene and the co-polypropylene which form the outer layer and the middle layer to form a homo-polypropylene layer material and a co-polypropylene layer material; 2) Extruding a homo-polypropylene layer material, a co-polypropylene layer material and a composite rubber material through a T-shaped die; 3) Cooling the extruded film by a cooling roller, drawing and stretching, measuring the thickness, performing surface corona treatment, cutting edges, winding to form a film and inspecting; 4) Placing the material roll into a packaging bag edge sealing device, so as to spray and color the material roll and seal edges of the packaging bag; 5) The packaging bags which are finished with the colors and the edge sealing are stored and put in storage; the preparation method of the modified corn flour comprises the following steps: 1) Fresh mature corns are used as raw materials, the moisture content of the corns is more than 60%, and the corns are subjected to impurity removal and cleaning; 2) Sending the washed mixture into a rolling and kneading machine for rolling and kneading treatment; the rolling treatment is that the rolling is carried out once every 5 minutes, the rolling is carried out for 5 minutes after the vacuum pumping is finished each time, then the vacuum is discharged, and the process is circulated for 3 times; 3) Juicing the rolled and kneaded corns, and collecting corn juice; 4) Placing the corn juice in a vacuum environment for spray drying, and controlling the temperature to be 25-30 ℃; 5) Grinding into powder, and storing. The edge sealing equipment for the packaging bag in the step 4 comprises a base 1, a constant-speed feeding structure 2, a vertical plate 11, a first roll shaft 12, a first roll body 13, convex teeth 14, a first motor 15, a first upright post 16, an edge pressing wheel 17, a coloring roll 18, a cooling block 19, an auxiliary structure 3, an edge sealing structure 4 and a cutter 110; the uniform-speed feeding structure 2 is arranged on one side of the base, the vertical plate 11 is arranged on the base, two ends of a first roller shaft 12 are fixedly connected with the vertical plate, a first roller body 13 is sleeved on the first roller shaft, convex teeth 14 are arranged on the first roller body, a first motor 15 is used for driving the first roller body, the first motor is the prior art purchased from the market and is not repeated here, a first upright post 16 is arranged on the first roller shaft, a blank holder wheel 17 is sleeved on the first upright post and is used for pressing out dents on the film, the blank holder wheel is of a wheel body structure with a right-angle wheel body arranged on the wheel body, a coloring roller 18 is arranged on the vertical plate, the coloring roller can select a gravure printing or silk-screen printing mode, the mode can be replaced, a cooling block 19 is arranged on one side of the coloring roller and is used for rapidly cooling the design and color, an auxiliary structure 3 is used for deepening the dents, a seal structure 4, the cutter is pushed by the cylinder, so that the packaging paper is cut into sections; put into the film in the pay-off structure at the uniform velocity, thereby carry out the at the uniform velocity output of film, the film will be around locating on first roll body, first roll body receives the drive of first motor through the dogtooth, thereby rotate, first roll body will play the effect of carrying the film at the pivoted in-process, meanwhile herein, the edging wheel that the cover was located on first stand will cooperate with between the first roll body, the drive that receives first roll body rotates in step, and make the both ends of film produce a crease, and deepen the degree of depth of crease under the effect of auxiliary structure, guarantee the definition of crease, will color through last look roller along with the film, and quick drying stereotypes under the effect of cooling block, and the banding that packs is handled in finally getting into the banding structure.

The uniform-speed feeding structure 2 comprises a first support 21, a first chute 22, a placing groove 23, a material roller 24, a feeding hole 25, a first sliding block 26, an extrusion roller 27 and a second motor 28; the first support 21 is arranged on one side of the base, the first sliding groove 22 is arranged on the first support, the placing groove 23 is arranged at the bottom of the first sliding groove, two ends of the material roller 24 are arranged in the placing groove, the feed inlet 25 is arranged on the side wall of the first sliding groove, the first sliding block 26 can move back and forth in the first sliding groove, two ends of the extrusion roller 27 can rotatably penetrate through the first sliding block, the second motor 28 is arranged on the first sliding block and used for driving the extrusion roller, and the second motor is a commercially available prior art and is not repeated herein; lift first slider upwards, put into first spout through the feed inlet with the material roller afterwards, and place material roller material both ends on the standing groove, loosen the lifting to first slider afterwards, first slider will descend with the squeeze roll together, extrude the top of material roller afterwards, rotate through the second motor afterwards, can drive the material roller and rotate, thereby output film, the output speed of film and the rotational speed of squeeze roll, the rotational speed of second motor is relevant promptly, it is irrelevant with material roller volume.

The auxiliary structure 3 comprises a first guide roller 31, a second guide roller 32, a third guide roller 33, a fixed block 34, a second roller shaft 35, a second roller body 36, a second bracket 37 and a reset roller 38; the two ends of the first guide roller 31, the second guide roller 32 and the third guide roller 33 are rotatably connected to the vertical plate, the fixed block 34 is fixedly connected to the vertical plate, the second roller shaft 35 is arranged on the fixed block, the second roller body 36 is sleeved on the second roller shaft, the second support 37 is arranged on the fixed block, and the reset roller 38 is rotatably arranged on the support; receive the film after the extrusion of blank pressing wheel, will be preferred to be walked around first guide roll, pass through second guide roll and third guide roll afterwards, because the position that the second guide roll set up is located the top of first guide roll, opposite direction with the perk of blank pressing, thereby after the film is walked around first guide roll, the blank pressing will be folded with the film body, the marginal portion of both sides is inwards folded promptly, and carry out further extrusion to the folding department under the effect of second guide roll, thereby deepen the indentation, will pass through the guide effect of third guide roll afterwards, on the second roll body is led to the film, and the blank pressing cover is located on the roller that resets, thereby turn over the blank pressing and open, the perk, get into the step of coloring afterwards.

The edge sealing structure 4 comprises a channel 41, a bent track 42, a fan 43, a groove 44, a bump 45, a first roller 46, a third motor 47, a driving wheel 48, a heating wheel 49, a cooling wheel 410 and an extrusion structure 5; the channel 41 is arranged on the base, the bending track 42 is arranged on the base, the fan 43 is arranged on the base, the fan is the prior art purchased from the market, and the description is omitted here, the groove 44 is arranged on the top of the channel, the bump 45 is arranged at the tail end of the bending track, the first roller 46 is arranged in the bump, the third motor 47 is used for driving the first roller to rotate, the third motor is the prior art purchased from the market, the plurality of driving wheels 48 are arranged on the side wall of the groove, the heating wheel 49 is arranged between the driving wheels, the cooling wheel 410 is used for rapid cooling, and the extrusion structure 5 is arranged at the tail end of the channel; after the blank pressing is turned up, the film moves through the bending track, the film is curled into a ring shape in a horizontal form gradually in the moving process, the blank pressing at two ends of the film are in mutual contact, the blank pressing is extruded by a first roller under the driving of a third motor to feed into a channel, at the moment, a fan provides air to a certain degree, the film can be better attached to the inner wall of the channel, the film is conveyed and moved, the blank pressing of the film is always in an attached state under the action of a driving wheel, the film passes through a heating wheel and is heated, the films at two sides are fused, the film is sealed, the film forms a cylindrical structure, and then the film is rapidly cooled through a cooling wheel and is reinforced, the roller can be arranged on the inner wall of the channel preferentially, a guide groove can be also formed in the groove, and the clamping accuracy of the blank pressing is improved.

The extrusion structure 5 comprises a first cavity 51, a slide rod 52, a second slide block 53, a second cavity 54, a roller group 55, a sliding track 56, a rotating ring 57, an extension block 571, a power roller 58, a sealing roller 59, a linkage structure 6 and a fixed sealing structure 7; the first cavity 51 is arranged below the channel, the sliding rod 52 is arranged in the first cavity, the second sliding block 53 can move back and forth on the sliding rod, the second cavity 54 is arranged on the second sliding block, the roller groups 55 can be rotatably connected in the second cavity and can be increased one by one along the axial direction of the channel, 3 sliding tracks 56 are arranged on the base, the rotating ring 57 can move on the sliding tracks, the extending blocks 571 are arranged on the rotating ring, the power rollers 58 are provided with a plurality of groups which are arranged on the extending blocks in a pairwise opposite manner, the edge sealing rollers 59 are arranged between the power groups, the linkage structure 6 is used for switching the processing modes, and the fixed edge sealing structure 7 is used for stabilizing the package; after the edge pressing and edge sealing are finished, the film is gradually formed into a flat shape from small to large through the roller group, the film is finally clamped and conveyed under the extrusion of the power roller, the film is kept flat through good clamping of the power roller in the conveying process, the film is subjected to sectional type edge sealing under the action of the edge sealing roller, and then the edge sealing positions are separated through the cutter to form individual packaging bags.

The linkage structure 6 comprises a third cavity 61, a rack 62, a gear 63 and a connecting block 64; the third cavity 61 is arranged on the side wall of the first cavity, the rack 62 is arranged on the second sliding block and can move back and forth in the third cavity, the gear 63 is arranged in the third cavity and is used for linking the rack, and the connecting block 64 is used for connecting the second sliding block and the rotating ring; when processing different types of wrapping bags, through rotating the change to the drive removes through the second slider that the connecting block links to each other, and drives the rack and remove in the third cavity, will drive another piece through the transmission of rack through the gear and carry out reverse removal with the second slider that the change links to each other, and the power roller will rotate certain angle this moment and be the horizontality for process other types's wrapping bags.

The fixed edge sealing structure 7 comprises a second upright post 71, a clamping block 72, a clamping roller 73, a first magnetic block 74, a third upright post 75, a second magnetic block 76, an edge sealing wheel 77 and a metal ball 78; the second upright column 71 is arranged on the extension block, the clamping block 72 is arranged on the second upright column, the clamping roller 73 is arranged on the clamping block, the first magnetic block 74 is arranged on the clamping block, the third upright column 75 is arranged on the extension block, the second magnetic block 76 is arranged on the third upright column, the first magnetic block and the second magnetic block are both magnets, the edge sealing wheel 77 is arranged on the third upright column for sealing edges, the metal ball 78 corresponds to the first magnetic block and the second magnetic block, and the metal ball is made of a material which can be attracted by the magnets and can be an iron block or a nickel alloy; when the film passes through the power roller, the metal ball is placed in the inner wall of the cylindrical film in advance, the metal ball moves towards two sides under the magnetic force action of the first magnetic block and the second magnetic block at the moment, so that straightening is performed, the edge pressing is clamped by the clamping roller and moves, the other end of the edge pressing is positioned at the clamping position of the edge sealing wheel, the position of the film corresponding to the edge pressing is tensioned downwards due to the attraction of the second magnetic block to the metal ball, and then the edge sealing wheel seals the edge of the film above the metal ball.

The specific operation flow is as follows:

the film is put into the uniform feeding structure 2, so as to output the film at a uniform speed, the film is wound on the first roller body 13, the first roller body is driven by the first motor 15 through the convex teeth 14, so as to rotate, the first roller body plays a role of conveying the film in the rotating process, the material roller 24 can be driven to rotate through the rotation of the second motor 28, so as to output the film, the output speed of the film is related to the rotating speed of the extrusion roller 27, namely the rotating speed of the second motor, so as to stabilize the uniform output, and at the same time, the material roller volume is not related, the edge pressing wheel 17 sleeved on the first upright post 16 is matched with the first roller body 13, the film is driven by the first roller body to rotate synchronously, and the two ends of the film generate a crease, when the film winds the first guide roller 31, the edge pressing wheel is folded with the film body, namely the edge parts at the two sides are folded inwards, the folding part is further extruded under the action of the second guide roller 32 to deepen the impression, then the film is guided to the second roller body 36 through the guiding action of the third guide roller 33, the blank pressing is sleeved on the reset roller 38 to fold and turn the blank pressing, the blank pressing is turned and tilted, then the film enters a coloring step, after the film is colored, the film is quickly dried and shaped under the action of the cooling block 19, then the film moves through the bending rail 42 and is gradually curled in a horizontal shape into a ring shape in the moving process, the blank pressing at two ends of the film are contacted with each other, the first roller 46 is driven by the third motor 47 to extrude the blank pressing to feed the material into the channel 41, at the moment, the fan 43 provides a certain degree of wind, so that the film can be better attached to the inner wall of the channel, the film is conveyed and moved, the blank pressing is always in an attaching state under the action of the driving wheel, and when the film passes through the heating wheel 49, heating is carried out so as to fuse the films on the two sides, thereby sealing the films, forming the films into a cylindrical structure, then rapidly cooling is carried out through a cooling wheel 410 so as to reinforce the films, the films with one reinforced end are pulled out along with a power roller 58, then when the films pass through the power roller 58, the films are gradually integrated into a flat shape from small to large through a roller group 55, and finally clamping and conveying are carried out under the extrusion of the power roller, then a metal ball 78 moves towards the two sides under the magnetic force of a first magnetic block 74 and a second magnetic block 76 so as to be straightened, the edge pressing is clamped by a clamping roller 73 and moves, the other end of the edge pressing is positioned at the clamping position of an edge sealing wheel 77, and the position of the films corresponding to the edge pressing is tensioned downwards due to the attraction of the second magnetic block to the metal ball, the film of metal ball top will be sealed to the banding wheel afterwards to carry out sectional type banding to the film under the effect of banding roller, separate through cutter 110 to banding department afterwards, form individual wrapping bag, repeat above-mentioned flow.