CN114055766A

CN114055766A - Method, equipment and production line for laminating film on paper pulp container

Info

Publication number: CN114055766A
Application number: CN202111352427.4A
Authority: CN
Inventors: 卢梁辉; 黄海丰; 王朱枫
Original assignee: Shurcon Manufacturing Zhejiang Co ltd
Current assignee: Shurcon Manufacturing Zhejiang Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-18

Abstract

The invention discloses a paper pulp container film coating method, paper pulp container film coating equipment and a paper pulp container production line, wherein the method comprises the following steps: s1, transmission: directly conveying the hot-pressed hot pulp container to a receiving lower die; and the cold film is drawn above the opening of the hot pulp container on the bearing lower die, and the cold film drawn to the opening of the hot pulp container is tensioned and has a gap with the opening of the hot pulp container; and S2, laminating the film, wherein the upper die and the lower bearing die are aligned and matched with each other so that the cold film enters and is attached to the inner wall and the inner bottom surface of the hot pulp container, and the cold film is subjected to heat exchange with the hot pulp container so that the cold film subjected to temperature rise and hot melting is fixed on the inner wall and the inner bottom surface of the hot pulp container, namely the film-coated pulp container is manufactured. The method, the equipment and the production line for laminating the paper pulp container have the advantages of low energy consumption, high production efficiency and the like.

Description

Method, equipment and production line for laminating film on paper pulp container

Technical Field

The invention belongs to the technical field of paper pulp molding film covering machinery, and particularly relates to a paper pulp container film covering method, equipment and a production line.

Background

The paper pulp molding product package has the advantages of environmental protection, degradability, recycling and the like, so the paper pulp molding product package is widely applied to the package of various foods such as vegetables, fruits, eggs and the like. However, the pulp molded product is often susceptible to moisture, and when the pulp molded product is affected by moisture, the pulp molded product is susceptible to strength reduction, even direct cracking, and the like. In order to improve the strength of products, many pulp molded products are coated with a film on a part of the surface which is susceptible to moisture.

In the prior art, the process of laminating the pulp molding product usually needs to heat the film to melt the adhesive in the film and then attach the adhesive to the cold pulp molding product. For example, the chinese patent publication No. CN211843193U discloses a film covering device for pulp molded products, which is to set the temperature of a film covering machine at 500-. And in the process of heating the film, the film is required to be melted and stretched and cannot be melted and cracked. Therefore, the heating control process for the film is complex, the film is easily heated in place or the film is easily broken due to overheating in the film covering process, and the process is not easy to simplify.

In the above-mentioned process, generally, the pulp molded product is produced by hot press molding, and the hot-pressed product itself often has a certain temperature, which further affects the film temperature, and the film may be in a good state when heated, but once the film is coated on the product surface, the film temperature is excessively high and the film is broken when finally coated due to the addition of the product temperature. Therefore, in the actual production at present, the pulp molded product before film coating needs to be added with a procedure of cooling the pulp molded product, which is time-consuming and labor-consuming. Therefore, the prior production line of the molding products with the coating has the problems of energy waste and environmental pollution.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for coating a film on a pulp container, an apparatus for coating a film on a pulp container, and a pulp container production line, which can solve the above problems.

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

a method of laminating a pulp container, the method comprising the steps of:

s1, transmission: directly conveying the hot-pressed hot pulp container to a receiving lower die; and the cold film is drawn above the opening of the hot pulp container on the bearing lower die, and the cold film drawn to the opening of the hot pulp container is tensioned and has a gap with the opening of the hot pulp container;

and S2, laminating the film, wherein the upper die and the lower bearing die are aligned and matched with each other so that the cold film enters and is attached to the inner wall and the inner bottom surface of the hot pulp container, and the cold film is subjected to heat exchange with the hot pulp container so that the cold film subjected to temperature rise and hot melting is fixed on the inner wall and the inner bottom surface of the hot pulp container, namely the film-coated pulp container is manufactured.

In the above method for laminating a pulp container, in step S1, the lower receiving mold reciprocates in a translational motion between a receiving station and a laminating station, and the upper mold is located directly above the laminating station.

In the above method for laminating a pulp container, in the step S1, the upper mold and the lower receiving mold are moved toward each other in the vertical direction so that the cold film enters and adheres to the inner wall and the inner bottom surface of the hot pulp container.

According to the method for laminating the paper pulp container, the two long side edges of the cold film are respectively clamped by the clamping and pulling mechanisms, so that the cold film is tensioned in the width direction.

According to the method for laminating the paper pulp container, after the upper die and the lower bearing die are aligned and matched with each other, the continuously unreeled cold film is tensioned in the length direction of the cold film, and at the moment, the clamping traction mechanism resets to the unreeling side of the cold film and clamps the two long side edges of the cold film again.

The method for laminating the paper pulp container further comprises the following steps:

s3, cutting off, when the clamping and pulling mechanism is reset and clamps the two sides of the cold film again, cutting off the cold film between one section of the cold film which is coated in the paper pulp container and one section of the cold film which is clamped by the clamping and pulling mechanism, and then repeating the steps S1 and S2.

and S4, taking materials, resetting the upper die and the receiving lower die, and taking and transferring the coated paper pulp container retained on the receiving lower die to the outside of the receiving lower die by using a material taking mechanism.

The pulp container laminating equipment of the pulp container laminating method comprises a rack, and the equipment further comprises:

the bearing lower die is arranged on the rack and is used for bearing the hot pulp container;

the upper die is matched with the bearing lower die;

the clamping and traction mechanism is used for clamping and traction two side edges of a cold film to be coated to the position above an opening of a hot pulp container of the receiving lower die, and when the upper die and the receiving lower die are aligned and matched with each other, the cold film enters and is attached to the inner wall and the inner bottom surface of the hot pulp container, the clamping and traction mechanism is reset to the cold film unwinding side and clamps the two long side edges of the cold film again;

and the cutting mechanism is used for cutting off the cold film between the section coated with the film in the pulp container and the section clamped by the clamping and pulling mechanism.

The utility model provides a paper pulp container laminating equipment, accept the lower mould and be connected with the translation board goes up and down, the translation board is connected with the lower mould translation actuating mechanism in the frame and makes and accepts the lower mould and accept station and the reciprocal translation motion of tectorial membrane station, is equipped with the drive on the translation board accept the lower mould lift actuating mechanism that the lower mould goes up and down in vertical direction.

According to the paper pulp container film coating equipment, the upper die is located right above the film coating station, and the upper die is connected with the upper die lifting driving mechanism on the rack, so that the upper die and the lower bearing die move in the vertical direction in the opposite direction.

Above-mentioned pulp container laminating equipment, centre gripping drive mechanism includes:

the traction fixing frames are horizontally distributed;

one end of the traction fixing frame extends into the rack;

the two side clamping claws are distributed on two long sides of the cold film;

the clamping claws at the two sides are connected with a translational traction driving component on the traction fixing frame.

In the above paper pulp container film laminating equipment, the cutting mechanism is a lifting type electric heating wire cutting.

The above pulp container laminating apparatus, the apparatus further comprising:

the unwinding mechanism is used for unwinding the whole roll of cold film to the clamping and traction mechanism;

and the material taking mechanism is used for taking and transferring the coated paper pulp container retained on the receiving lower die to the outside of the receiving lower die.

A pulp container production line is provided with the pulp container film coating equipment.

Compared with the prior art, the invention has the advantages that:

the paper pulp container film covering method of the invention directly transmits the paper pulp container product after hot pressing to the lower die, and utilizes the heat of the paper pulp container product after hot pressing to directly cover with the cold film. Need not to heat the cold membrane alone, reduced the equipment and the process to cold membrane heating, great saving equipment and man-hour, improved tectorial membrane efficiency. Meanwhile, the condition that the film is heated unevenly and cracked easily when the cold film is heated is avoided.

The paper pulp container film coating equipment can directly carry out cold film coating operation on hot paper pulp container products, does not need to heat films, reduces film heating equipment and simplifies equipment structure.

The paper pulp container film covering equipment is also provided with a matched cold film clamping and traction mechanism, and the original unreeling mode is not adopted any more, but the mode of clamping and moving by the clamping claws is adopted. The mode not only can realize the unreeling of the cold film, but also can lead the clamping claws to tightly clamp the cold film when the film is coated, so that the cold film is in a tensioning state when the film is coated, and the situation of film coating wrinkles and the like is not easy to happen.

Drawings

FIG. 1 is a schematic structural view of a pulp container laminating apparatus provided by the present invention.

Fig. 2 is another side view of the structure of fig. 1.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is a schematic structural diagram of the unwinding mechanism and the clamping and pulling mechanism.

Fig. 5 is a schematic structural view of the frame and the receiving lower die.

Fig. 6 is a schematic structural view of the clamping and pulling mechanism.

Fig. 7 is a schematic structural view of the cutting mechanism.

Fig. 8 is a schematic view of the backside structure of fig. 1.

FIG. 9 is a schematic view of the structure of a pulp container film coating line with a film coating apparatus in example 5.

FIG. 10 is a schematic view of the structure of a pulp container film coating line with a film coating apparatus according to example 6.

In the figure, a paper pulp container film coating device 1, a frame 11, an upper frame 10, a receiving lower die 12, an upper die 13, a translation plate 14, a lower die translation driving mechanism 15, a lower die lifting driving mechanism 16, an upper die lifting driving mechanism 17, a clamping and traction mechanism 18, a traction fixing frame 181, a side clamping claw 182, a translation traction driving assembly 183, a cutting mechanism 19, an unwinding mechanism 2, an unwinding frame 21, an unwinding roller 22, an unwinding tensioning roller 23, a material taking mechanism 3, a material taking fixing frame 31, a material taking manipulator 32, a material taking translation driving assembly 33, an output belt 34, a cold film B, a forming machine 4, a multi-axis transfer device 5 and a hot press 6.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1, the pulp container film coating apparatus of the present embodiment includes a frame 11, a receiving lower die 12, an upper die 13, a lower die translation driving mechanism 15, a lower die lifting driving mechanism 16, an upper die lifting driving mechanism 17, a clamping and pulling mechanism 18, a cutting mechanism 19, an unwinding mechanism 2, and a material taking mechanism 3.

As shown in fig. 1, the receiving lower die 12 in this embodiment is a receiving lower die for coating a circular bowl, and in practice, the receiving lower die having a shape corresponding to various products may be replaced as needed, and is not limited to the circular bowl shape in this embodiment. The receiving lower die 12 of the present embodiment specifically includes a lower die plate 121 for circular bowl film covering, a demolding frame 122, and a film covering vacuum cover, which is not shown in the figure and is located right below the lower die plate 121. As shown in fig. 5, the receiving lower mold 12 is integrally located on the translation plate 14, and the translation plate 14 is connected to the bottom of the vacuum cover of the receiving lower mold 12 through a plurality of fixing rods 141. Due to the arrangement of the fixing rods 141, a spacing position is arranged between the translation plate 14 and the film covering vacuum cover, and a plurality of heating rods 140 are further arranged at the spacing position, and the heating rods 140 are used for heating the bearing lower die 12. Of course only when heating is required. For example, when the temperature required for film covering cannot be guaranteed after the pulp container to be covered with the film radiates excessive heat in the conveying process, the pulp container product needs to be further heated.

As shown in fig. 1, the translation plate 14 is connected to a lower mold translation drive mechanism 15 on the frame 11 so that the receiving lower mold 12 reciprocates in translation at the receiving station and the film coating station. As shown in fig. 1, when the receiving lower mold 12 is located far away from the cold film B, the station where the receiving lower mold 12 is located is a receiving station, that is, the upper side of the receiving lower mold 12 is suspended, so that the receiving lower mold can conveniently receive the hot product with the coating transferred by the transferring device. When the receiving lower die 12 receives the hot product, the receiving lower die moves right below the cold film B, and the station where the receiving lower die 12 is located is a film covering station. The lower mold translation driving mechanism 15 includes two parallel slide rails 151 located at two side edges of the translation plate 14, a slide block 152 is arranged on the slide rails 151, and two sides of the translation plate 14 close to the slide block 152 are connected with the slide block 152. The translation plate 14 can slide on the slide rail 151 along with the slide block 152, so that the receiving lower die can reciprocate and translate between a receiving station and a film covering station.

As shown in fig. 1 and 5, a lower mold lifting drive mechanism 16 for driving the receiving lower mold 12 to vertically lift is further provided on the translation plate 14. The lower mold lifting drive mechanism 16 includes a lifting bearing 162 and a first cylinder 161, but in the specific implementation, it is not limited to a lifting motor, and a gear mechanism or the like may be used instead. The translation plate 14 is fixed on the lifting bearing 162, and the lower receiving mold 12 is driven to ascend or descend by the lifting bearing 162.

As shown in figure 1, the upper die 13 is positioned right above the film covering station, and the upper die 13 is connected with an upper die lifting driving mechanism 17 on the frame 11 to realize the opposite movement of the upper die 13 and the lower receiving die 12 in the vertical direction. Specifically, the upper mold lifting drive mechanism 17 includes a second cylinder 171, a lifting bearing 172, and a cylinder fixing plate 173, the cylinder fixing plate 173 is fixed to the upper frame 10, and the lifting bearing 172 is fixed to the cylinder fixing plate 173. The upper die 13 is connected to one end of the lifting bearing 172 and can lift along with the lifting bearing 172, so that the lower die 12 can move in the vertical direction.

As shown in fig. 1, 4 and 6, the clamping and pulling mechanism 18 is used for clamping and pulling two side edges of the cold film B to be coated to the position above the opening of the hot pulp container of the receiving lower mold 12, and when the upper mold 13 and the receiving lower mold 12 are aligned and matched with each other, so that the cold film B enters and is attached to the inner wall and the inner bottom surface of the hot pulp container, the clamping and pulling mechanism 18 is reset to the cold film unwinding side and clamps the two long side edges of the cold film B again. Specifically, the clamping and pulling mechanism 18 includes two pulling fixing frames 181 parallel to each other and two corresponding side clamping claws 182, and the clamping claws 182 are translated along the length direction of the pulling fixing frames 181 under the action of the translation pulling driving assembly 180. Two mutually parallel traction fixing frames 181 are respectively fixed on the upper frame 10, and the upper frame 10 is connected with the frame 11 and is located above the frame 11.

The translational traction drive assembly 180 includes an actuator 1801, a drive shaft 1802, a gripper jaw translation seat 1803, a belt drive 1804, and a gripper jaw attachment block 1805. The belt transmission structure 1804 is fixed on the traction fixing frame 181. The gripper jaw moving base 1803 is connected to the gripper jaw 182 by a gripper jaw connecting block 1805. The driver 1801 drives the transmission shaft 1802 to rotate, and the gripper jaw moving seat 1803 moves the gripper jaw moving seat 1803 in the horizontal direction through the belt transmission structure 1804, so as to drive the gripper jaw 182 to reciprocate in the horizontal direction. The belt drive structure 1804 may be a pulley belt and pulley assembly. In specific implementation, the belt transmission structure 1804 may be replaced by a screw rod and threaded sleeve structure, and the structure is not limited to the above structure.

As shown in fig. 2, 3, 5 and 7, the cutting mechanism 19 includes a heating wire 191, a fixing frame 192, a lifting plate 193, a cutting mechanism lifting shaft 194, a cutting mechanism cylinder 195 and a heating wire connecting lifting block 196. The fixing frame 192 is fixed at one end of the frame close to the unreeling mechanism 2, the cutting mechanism lifting shaft 194 connected to the cutting mechanism cylinder 195 is connected to the fixing frame 192 in a lifting manner, one end of the cutting mechanism lifting shaft 192 is further connected with a lifting plate 193, two ends of the lifting plate 193 are respectively fixed with a heating wire connecting lifting block 196, and two ends of the heating wire 191 are respectively fixed on the two heating wire connecting lifting blocks 196. After the film covering is finished, the heating wire 191 can approach the cold film along with the lifting of the lifting plate 193, and after the cold film is approached, the heating wire 191 realizes the cutting of the cold film under the telescopic motion of the heating wire connecting lifting block 196. After cutting, the heating wire rises along with the direction that the lifting plate 193 is far away from the cold film, and reciprocates in such a way, so that the film after being coated is cut off each time. In specific implementation, the structure of the heating wire is not limited, and other fusing or cutting structures, such as a blade, may be adopted.

As shown in fig. 1, 2 and 4, the unwinding mechanism 2 is disposed at one side of the frame 11, and is used for unwinding the whole roll of cold film to the clamping and pulling mechanism 18. The unwinding mechanism 2 comprises an unwinding frame 21, an unwinding roller 22 is arranged on the unwinding frame 21, a plurality of unwinding tensioning rollers 23 are uniformly distributed at intervals on the unwinding frame 21, and the cold film B is wound on the unwinding tensioning rollers 23 and is wavy.

As shown in fig. 1 and 8, the take-out mechanism 3 is provided on the film coating station side of the frame 11, and is configured to take out and transfer the coated pulp container, which is retained on the lower receiving mold 12 after coating, to the outside of the lower receiving mold 12. Specifically, the material taking mechanism 3 comprises a material taking fixing frame 31, and the material taking fixing frame 31 is connected to the rack 11. Since it is necessary to take and transfer the coated pulp container, which is coated with the film and then remains on the receiving lower die 12, to the outside of the take-out structure outside the receiving lower die 12, a take-out robot 32 is horizontally slidably connected to the take-out holder 31. The reject robot 32 removes the coated pulp container at the coating station and moves the container to an output belt 34 of the reject mechanism. The material taking manipulator 32 is slidably connected to the manipulator slide rail 35, and the manipulator slide rail 35 is fixed to the frame 11 and located on one side of the material taking mechanism 3 and the laminating station. The material taking fixing frame 31 is connected with the tail end of the manipulator slide rail 35 through a connecting rod 36.

The material taking translation driving assembly 33 comprises a material taking translation driver 331 and an output belt rolling shaft 332, a driven shaft is further arranged at a position parallel to the opposite surface of the output belt rolling shaft 332, the output belt rolling shaft 332 and the driven shaft are respectively fixed on a material taking fixing frame, and the driven shaft is far away from the output belt rolling shaft 332, namely the driven shaft is close to the film covering station. An output belt 34 is disposed between the output belt rolling axle 332 and the driven axle. The output belt 34 reciprocates as the output belt rolling shaft 332 and the driven shaft rotate, thereby realizing the output of the pulp container taken by the material-taking manipulator 32 from the film-coating station.

The operation of the pulp container laminating device of the embodiment is as follows: when the external transfer equipment transfers the hot pulp container product after the hot press forming to the receiving lower die 12 at the receiving station, the lower die translation driving mechanism 15 drives the receiving lower die 12 to move to the film coating station. Meanwhile, the unwinding mechanism 2 where the cold film is located unwinds and is clamped by the clamping claws of the clamping and traction mechanism 18 to be drawn above the film coating station. After the cold film is pulled in place, the lower die lifting driving mechanism 16 and the upper die lifting driving mechanism 17 respectively and simultaneously drive the receiving lower die 12 and the upper die 13 to move oppositely, namely the receiving lower die 12 and the upper die 13 simultaneously approach to the cold film, and finally the cold film is pressed at the position where the hot pulp container product between the receiving lower die 12 and the upper die 13 needs to be coated with the film, so that the film coating is completed. When the lamination is completed, the cold film in situ at the lamination station is pressed between the lower receiving die 12 and the upper die 13. Namely, one end of the cold film is pressed between the lower bearing die 12 and the upper die 13, and the other end is still fixed on the unwinding mechanism. The clamping claw which clamps the cold film at the film coating station can be released to clamp the cold film, and the clamping claw is released to clamp the cold film at the film coating station, so that the clamping claw is in a pressing state, can not displace, and then resets to an original position close to the unwinding mechanism to clamp the newly unwound cold film. Next, the cutting mechanism 19 is activated, heating the heating wire 191 and lifting the heating wire 191 to a position close to the film and cutting it, and here the position of the heating wire is just at the side of the stripper frame 122, so that the cut film just coincides with the edge of the pulp container product. The newly unreeled cold film is clamped by the clamping claws to be drawn again for the cold film required by the next film covering, and the moving of the cold film required by the film covering is completed in such a reciprocating way.

And finally, after the paper pulp container product is coated, the lower bearing die 12 and the upper die 13 are removed. The pulp container product is removed by a take off robot 32 at the take off mechanism 3 and placed on an output belt 34 at the take off mechanism 3 for output.

The above process is cyclically operated to complete the film-coating work for one pulp container product after another.

Example 2

The other structure of this embodiment is the same as embodiment 1, and the difference structure is: the unwinding frame 21 is extended upward, and the traction fixing frame 181 is arranged on the upper extension section of the unwinding frame 21. The traction fixing frame 181 still extends from above the unwinding mechanism to above the film coating station. Only the fixed position is changed.

Example 3

A method of laminating a pulp container, the method comprising the steps of:

s1, transmission: directly conveying the hot-pressed hot pulp container to the receiving lower die 12; and the cold film B is drawn above the opening of the hot pulp container on the bearing lower die 12, the cold film B drawn to the opening of the hot pulp container is tensioned and has a gap with the opening of the hot pulp container; the clearance is left to transfer the heat of the pulp container to the cold film in advance, so that the cold film is heated in advance, and the cold film has better ductility.

And S2, laminating, wherein the upper die 13 and the lower receiving die 12 are aligned and matched with each other, so that the cold film B enters and is attached to the inner wall and the inner bottom surface of the hot pulp container, and the cold film B exchanges heat with the hot pulp container, so that the cold film B heated and melted is fixed on the inner wall and the inner bottom surface of the hot pulp container, and the laminated pulp container is manufactured.

In the above method for laminating a pulp container, in step S1, the lower receiving mold 12 is moved in a reciprocating translational motion between a receiving station and a laminating station, and the upper mold 13 is located right above the laminating station.

In the above method for coating a pulp container, in the above step S1, the upper mold 13 and the receiving lower mold 12 are moved toward each other in the vertical direction so that the cold film B enters and adheres to the inner wall and the inner bottom surface of the hot pulp container.

In the above method for laminating the pulp container, the two long sides of the cold film B are respectively clamped by the clamping and pulling mechanism 18 so that the cold film B is tensioned in the width direction.

According to the paper pulp container film laminating method, after the upper die 13 and the lower receiving die 12 are aligned and matched with each other, the continuously unreeled cold film B is tensioned in the length direction of the cold film, and at the moment, the clamping and traction mechanism 18 is reset to the cold film unreeling side and clamps the two long side edges of the cold film B again.

s3, cutting off, when the clamping and pulling mechanism 18 is reset and the two sides of the cold film B are clamped again, cutting off the cold film B between one section of the film covered in the pulp container and one section clamped by the clamping and pulling mechanism 18, and then repeating the steps S1 and S2.

s4, the upper mold 13 and the receiving lower mold 12 are returned to their original positions, and the coated pulp container retained on the receiving lower mold 12 is taken out by the take-out mechanism 3 and transferred to the outside of the receiving lower mold 12.

Example 4

The other steps of the method of this embodiment are the same as those of embodiment 3, except that in step S1 of the above-described pulp container coating method, the upper die 13 and the lower receiving die 12 are not moved toward each other in the vertical direction, but the lower receiving die 12 is fixed and does not move up and down, and the upper die 13 is lowered relative to the lower receiving die 12. Or the upper die 13 is fixed and does not lift, and the receiving lower die 12 lifts relative to the upper die 13.

Example 5

As shown in fig. 9, a pulp container production line with a film includes at least one forming machine 4, two hot presses 6, a multi-axis transfer device 5, and a film coating apparatus 1. And the multi-axis transfer device 5 is used for taking and transferring the hot pulp container formed by the hot press 6 out of the hot press 6. The film laminating equipment 1 is used for transferring the multi-axis transfer device 5 to a hot pulp container outside the hot press 6 for carrying, enabling a cold film B to be laminated to be directly contacted with the hot pulp container for heating, and laminating the heated cold film on the inner wall and the inner bottom surface of the hot pulp container.

The multi-axis transfer device 5 is located between the molding machine 4 and the laminating apparatus 1.

The hot press 6 is provided with two hot presses 6, and the two hot presses 6 are distributed on the same side of the multi-axis transfer device 5; or one hot press 6 is respectively distributed on two sides of the multi-axis transfer device 5. Because the multi-axis transfer device 5 firstly transfers the semi-finished product on the molding machine 4 to the hot press 5, and then directly transfers the hot product on the hot press 5 to the laminating equipment 1, that is to say, the multi-axis transfer device 5 needs to be responsible for transferring the products on the molding machine 4, the hot press 6 and the laminating equipment 1, and the specific transfer sequence can be freely set according to the process requirements.

Example 6

The other structure of this embodiment is the same as that of embodiment 1, except that, as shown in fig. 10, the production line of the pulp container with the coated film comprises 6 hot presses which are respectively distributed on both sides of the multi-axis transfer device 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A method for coating a pulp container, wherein the method comprises the following steps:

S1. Transfer: transfer the hot-pressed hot pulp container directly to the receiving lower die (12); and make the cold film (B) be drawn to the top of the opening of the hot pulp container on the receiving lower die (12), and be drawn to The cold film (B) at the opening of the hot pulp container is tensioned and has a gap with the opening of the hot pulp container;

S2. Lamination, the upper mold (13) and the receiving lower mold (12) are aligned and matched with each other so that the cold film (B) enters and adheres to the inner wall and inner bottom surface of the hot pulp container, and the cold film (B) and the hot pulp The container is heat exchanged so that the cold film (B) after heating and melting is fixed on the inner wall and inner bottom surface of the hot pulp container, that is, the film-coated pulp container is prepared.

2. The method for coating a pulp container according to claim 1, characterized in that, in the above-mentioned step S1, the receiving lower die (12) reciprocates and translates between the receiving station and the coating station, and the upper The die (13) is located just above the laminating station.

3. The method for coating a pulp container according to claim 1, characterized in that, in the above-mentioned step S1, the upper die (13) and the receiving lower die (12) move toward each other in the vertical direction to make the cold film (B) Enter and conform to the inner wall and inner bottom surface of the hot pulp container.

4. The method for coating a pulp container according to claim 1, wherein the two long sides of the cold film (B) are respectively clamped by the clamping and pulling mechanism (18) so that the width of the cold film (B) is Orientation is tensioned.

5. The method for coating a pulp container according to claim 4, characterized in that when the upper die (13) and the receiving lower die (12) are aligned and matched with each other, the continuously unrolled cold film (B) is cooled The length direction of the film is tensioned, and at this time, the clamping and pulling mechanism (18) is reset to the unwinding side of the cold film and clamps the two long sides of the cold film (B) again.

6. The method for coating a pulp container according to claim 5, wherein the method further comprises:

S3. Cut off. When the clamping and pulling mechanism (18) is reset and clamps both sides of the cold film (B) again, the cold film (B) has been covered in the pulp container and the clamped pulling mechanism (B). 18) Cut between the clamped sections, and then repeat the above-mentioned steps S1 and S2.

7. The method for coating a pulp container according to claim 6, wherein the method further comprises:

S4, take material, reset the upper die (13) and the lower receiving die (12), and use the reclaiming mechanism (3) to obtain and transfer the coated pulp container remaining on the lower receiving die (12) to the lower receiving die (12). )outside.

8. The pulp container coating equipment according to the method for coating pulp containers according to any one of claims 1-7, comprising a frame (11), characterized in that, the equipment further comprises:

The lower die (12) is accepted and installed on the frame (11) for accepting the hot pulp container;

an upper die (13), matched with the said receiving lower die (12);

The clamping and pulling mechanism (18) is used for clamping and pulling the two sides of the cold film (B) to be coated to the upper part of the opening of the hot pulp container receiving the lower mold (12). When the molds (12) are aligned and matched with each other so that the cold film (B) enters and adheres to the inner wall and inner bottom surface of the hot pulp container, the clamping and pulling mechanism (18) is reset to the cold film unwinding side and the cold film is re-rolled. The two long sides of the film (B) are clamped;

A cutting mechanism (19) is used for cutting between a section of the cold film (B) that has been coated in the pulp container and a section clamped by the clamping and pulling mechanism (18).

9 . The pulp container laminating equipment according to claim 8 , wherein the lower receiving mold ( 12 ) is connected up and down with the translation plate ( 14 ), and the translation plate ( 14 ) is connected to the frame ( 11 ). 10 . The upper and lower mold translation drive mechanism (15) is connected so that the receiving lower mold (12) reciprocates translationally in the receiving station and the laminating station, and the translation plate (14) is provided with a drive to drive the receiving lower mold (12) to A lower die lift drive mechanism (16) that lifts vertically.

10. The pulp container laminating equipment according to claim 9, characterized in that the upper die (13) is located directly above the lamination station, and the upper die (13) and the upper die (11) on the frame (11) The die lift drive mechanism (17) is connected to realize the opposite movement of the upper die (13) and the receiving lower die (12) in the vertical direction.

11. The pulp container laminating equipment according to claim 8, wherein the clamping and pulling mechanism (18) comprises:

The traction fixing frame (181) is horizontally distributed;

One end of the traction fixing frame (181) extends into the frame (11);

There are two side clamping claws (182) and are distributed on the two long sides of the cold film (B);

The clamping claws (182) on both sides are connected with the translation traction drive assembly (183) on the traction fixing frame (181).

12 . The pulp container coating equipment according to claim 11 , wherein the cutting mechanism ( 19 ) is a lift-type electric heating wire cutting. 13 .

13. The pulp container coating equipment according to claim 11, wherein the equipment further comprises:

an unwinding mechanism (2) for unwinding the whole roll of cold film to a clamping and pulling mechanism (18);

The reclaiming mechanism (3) is used to obtain and transfer the film-coated pulp container remaining on the receiving lower die (12) to the outside of the receiving lower die (12).

14. A pulp container production line, characterized in that it has the pulp container coating equipment according to any one of claims 8-13.