Circular cutter die cutting device for composite MPP foam

Abstract

The utility model relates to the technical field of foam die cutting processing, in particular to a circular cutter die cutting device for composite MPP (modified polypropylene) foam, which comprises a vertical frame. A feeding traction roller set, a first composite roller set, a second composite roller set, a first die cutting roller set, a first waste discharge guide roller set, a third composite roller set, a second die cutting roller set, a second waste discharge guide roller set and a discharging traction roller set are sequentially arranged in the middle of the vertical rack. A first double-faced adhesive tape discharging roller, a first waste discharging roller, a foam discharging roller, a second double-faced adhesive tape discharging roller, a second waste discharging roller, a third waste discharging roller, a gummed paper discharging roller, a fourth waste discharging roller and an OPP adhesive tape discharging roller are arranged at the upper part of the vertical rack; a release paper discharging roller, a bottom supporting film discharging roller and a bottom supporting film collecting roller are arranged on the lower portion of the vertical rack, and a finished product discharging box is arranged at the discharging end of the discharging traction roller set. According to the utility model, the circular cutter is adopted for punching and one-step forming, manual waste discharge is not needed, and the technical problems that foam is easy to collapse, the production efficiency is low and manual waste discharge is needed during flat cutter die cutting can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foam die cutting processing technology, especially to a circular knife die cutting device for composite MPP foam. BACKGROUND

[0002] MPP is a kind of polypropylene microcellular foaming new material, and the size of cell is less than 100 microns, due to the existence of a large number of micron-sized cells in the material, MPP has excellent shock absorption, buffering, heat insulation and sound absorption performance, and can be applied to electronic products, new energy batteries, packaging materials and the like. A new energy battery pack is usually composed of a plurality of modules, each battery module contains a plurality of battery cells, and during the charging and discharging process of the battery, the module is prone to swelling and friction, so it is necessary to attach MPP foam between the battery cells and the module for buffering, shock absorption and heat insulation, thereby improving the durability and safety of the battery pack.

[0003] Composite MPP foam is attached to a plurality of functional layers on the basis of MPP foam sheet to improve the use performance of the foam. Before being installed into a new energy power battery, the composite MPP foam needs to be cut into an appropriate size. The existing composite MPP foam die cutting mechanism usually uses a flat knife machine for punching. During the die cutting process, the product is prone to wrinkle collapse, which results in that the die cutting machine rate cannot be too large, the cutting speed is slow, and manual waste removal is required. After die cutting, manual work is required to remove the off-type paper with a jig, which occupies a large amount of labor and has low production efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a circular knife die cutting device for composite MPP foam, which can improve the wrinkle collapse caused by flat knife production, and the circular knife punching is once formed without manual waste removal, thereby improving the production efficiency and effectively solving the technical problems of easy collapse of the existing MPP foam during die cutting, low production efficiency and product qualification rate, and the need for manual waste removal.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0006] In one technical scheme of the utility model, a circular knife die cutting device for composite MPP foam is provided, which comprises a vertical rack, a plurality of roller assemblies are arranged on one side of the vertical rack in a longitudinal direction, a driving and transmission device is arranged on the other side of the vertical rack,

[0007] A feeding traction roller group, a first composite roller group, a second composite roller group, a first die cutting roller group, a first waste removal guide roller group, a third composite roller group, a second die cutting roller group, a second waste removal guide roller group and a discharging traction roller group are sequentially arranged on the same horizontal height of the middle part of the vertical rack along the material conveying direction;

[0008] The upper part of the vertical rack is sequentially provided with a first double-sided adhesive tape feeding roller, a first waste roller, a foam feeding roller, a second double-sided adhesive tape feeding roller, a second waste roller, a third waste roller, a glue paper feeding roller, a fourth waste roller and an OPP adhesive tape feeding roller along the material conveying direction;

[0009] The lower part of the vertical rack is sequentially provided with a release paper feeding roller, a backing film feeding roller and a backing film collecting roller along the material conveying direction;

[0010] The first double-sided adhesive tape feeding roller and the first waste roller are arranged above the feeding traction roller group, the release paper feeding roller is arranged below the feeding traction roller group, the foam feeding roller is arranged above the first composite roller group, the second double-sided adhesive tape feeding roller and the second waste roller are arranged above the second composite roller group, the backing film feeding roller is arranged below the second composite roller group, the third waste roller is arranged above the first waste guide roller group, the glue paper feeding roller is arranged above the third composite roller group, the fourth waste roller and the OPP adhesive tape feeding roller are arranged above the second waste guide roller group, and the backing film collecting roller is arranged below the discharging traction roller group.

[0011] The discharging end of the discharging traction roller group is provided with a finished product discharging box.

[0012] The above technical scheme is adopted, the multiple roller assemblies arranged in the middle part of the vertical rack are used for traction, roller pressing and composite of the layers of material belts in the foam product, and die cutting is performed, so that a composite MPP foam with a required shape is finally obtained, the multiple roller assemblies arranged in the upper part and the lower part of the vertical rack are used for feeding and winding of the composite layers of material belts in the foam product, manual work is reduced, automatic and synchronous linkage production is realized, and production efficiency is improved.

[0013] Further, the release paper feeding roller feeds the release paper into the feeding traction roller group, and the first double-sided adhesive tape feeding roller feeds the first double-sided adhesive tape into the feeding traction roller group, the feeding traction roller group includes a double-sided adhesive tape first pressing roller and a feeding supporting roller with opposite rotating directions, and the release paper and the first double-sided adhesive tape are pressed and bonded under the cooperation of the double-sided adhesive tape first pressing roller and the feeding supporting roller; the first waste roller is used for collecting the first glue paper waste after the first double-sided adhesive tape is peeled off and output from the feeding traction roller group.

[0014] Further, the first composite roller group includes a foam composite pressing roller and a foam composite supporting roller with opposite rotating directions, the foam feeding roller feeds the MPP foam into the first composite roller group, and the MPP foam and the first double-sided adhesive tape are pressed and bonded under the cooperation of the foam composite pressing roller and the foam composite supporting roller. The layers of material after composite in this stage are the release paper, the first double-sided adhesive tape and the MPP foam from bottom to top.

[0015] Further, the second composite roller set comprises a double-sided adhesive second pressing roller and a double-sided adhesive composite carrier roller with opposite rotating directions, the bottom supporting film feeding roller delivers the bottom supporting film to the second composite roller set, the second double-sided adhesive feeding roller delivers the second double-sided adhesive to the second composite roller set, and the second double-sided adhesive is pressed and adhered to the MPP foam roller under the cooperation of the double-sided adhesive second pressing roller and the double-sided adhesive composite carrier roller; the second waste roller is used for collecting the second adhesive paper waste after the second double-sided adhesive is peeled off from the second composite roller set.

[0016] Further, the first die cutting roller set comprises a first circular knife roller and a first die cutting carrier roller with opposite rotating directions, the material layer between the first circular knife roller and the first die cutting carrier roller is pressed and die cut under the die cutting action of the first circular knife roller, and the material layer waste after the die cutting of the first circular knife roller is collected through the third waste roller under the guidance of the first waste guide roller set.

[0017] Further, the third composite roller set comprises an adhesive paper composite pressing roller and an adhesive paper composite carrier roller with opposite rotating directions, the adhesive paper feeding roller delivers the double-sided adhesive paper to the third composite roller set, and the double-sided adhesive paper is pressed and adhered to the second double-sided adhesive under the cooperation of the adhesive paper composite pressing roller and the adhesive paper composite carrier roller. The material layer after the composite in this stage is sequentially the release paper, the first double-sided adhesive, the MPP foam, the second double-sided adhesive and the double-sided adhesive paper from bottom to top.

[0018] Further, the second die cutting roller set comprises a second circular knife roller and a second die cutting carrier roller with opposite rotating directions, the material layer between the second circular knife roller and the second die cutting carrier roller is pressed and die cut under the die cutting action of the second circular knife roller; the OPP adhesive tape feeding roller delivers the OPP adhesive tape to the second waste guide roller set, so as to adhere to the waste after the die cutting of the second circular knife roller, and the fourth waste roller is used for collecting the OPP adhesive tape waste.

[0019] Further, the material output traction roller set delivers the die-cut composite MPP foam to the finished product output box, and the bottom supporting film collecting roller is used for recycling the bottom supporting film.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] The circular die-cutting device for composite MPP foam provided by this utility model introduces a circular die to die-cut the foam in the die-cutting process. This not only controls the lateral tension, keeping the MPP foam product in a taut state during production, but also improves the wrinkles and collapses caused by flat die production, thus increasing production yield and efficiency. Furthermore, after the MPP foam product is cut by the circular die, it is directly discharged without rollers, eliminating the need for manual waste removal. The circular die-cutting can be completed in one step, eliminating the need for manual application of release paper. This not only saves a lot of labor and improves production efficiency, but also reduces production costs and improves product quality. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the circular die-cutting device for composite MPP foam in this utility model;

[0024] Figure 2 This is a schematic diagram of the internal material layer distribution of the composite MPP foam in this utility model;

[0025] Figure 3 This is a schematic diagram of the punching position of the first circular cutter roller in this utility model;

[0026] Figure 4 This is a schematic diagram of the punching position of the first circular cutter roller in this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the composite MPP foam product of this utility model.

[0028] The diagram labels are as follows: 1. Feeding traction roller group; 111. First pressure roller for double-sided adhesive; 112. Feeding idler roller; 2. First composite roller group; 211. Foam composite pressure roller; 212. Foam composite idler roller; 3. Second composite roller group; 311. Second pressure roller for double-sided adhesive; 312. Double-sided adhesive composite idler roller; 4. First die-cutting roller group; 411. First circular cutter roller; 412. First die-cutting idler roller; 5. First waste discharge guide roller group; 6. Third composite roller group; 611. Adhesive-paper composite pressure roller; 612. Adhesive-paper composite idler roller; 7. Second die-cutting roller group; 711. Second circular cutter roller; 712. Second die-cutting idler roller; 8. Second waste discharge guide roller group; 9. Discharge traction roller group; 10. Finished product discharge box; 11. 11. First double-sided adhesive feeding roller; 12. First row of waste rollers; 121. First adhesive paper waste; 13. Foam feeding roller; 14. Second double-sided adhesive feeding roller; 15. Second row of waste rollers; 151. Second adhesive paper waste; 16. Third row of waste rollers; 161. Material layer waste; 17. Adhesive paper feeding roller; 18. Fourth row of waste rollers; 181. OPP tape waste; 19. OPP tape feeding roller; 20. Release paper feeding roller; 21. Bottom film feeding roller; 22. Bottom film receiving roller; 100. Vertical frame; 101. Bottom film; 102. Release paper; 103. First double-sided adhesive; 104. MPP foam; 105. Second double-sided adhesive; 106. Double-sided adhesive with its own paper; 107. OPP tape. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment.

[0030] In the description of this embodiment, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0033] refer to Figure 2 and Figure 5 The composite MPP foam of this invention has an internal layer structure comprising, in sequence, release paper 102, first double-sided adhesive 103, MPP foam 104, second double-sided adhesive 105, and double-sided adhesive-backed paper 106. The release paper 102 has a thickness of 0.08 mm, the first double-sided adhesive 103 has a thickness of 0.05 mm, the MPP foam 104 has a thickness of 2 mm, the second double-sided adhesive 105 has a thickness of 0.05 mm, and the double-sided adhesive-backed paper 106 has a thickness of 0.1 mm.

[0034] The middle part of the composite MPP foam is a rectangular cutout, the remaining frame is rectangular in shape, and there are rectangular protrusions on different sides of the two short sides. One side of the protrusion is made of release paper 102, and the other side of the protrusion is made of double-sided adhesive paper 106.

[0035] refer to Figure 1 In one embodiment of this utility model, a circular die-cutting device for composite MPP foam is provided, including a vertical frame 100. On one side of the vertical frame 100, multiple roller assemblies are arranged in a multi-layered manner in the longitudinal direction. On the other side of the vertical frame 100, a drive and transmission device corresponding to the position of the roller assemblies is provided (not shown in the figure, but can be driven by a conventional motor or worm gear transmission).

[0036] Specifically, at the same horizontal height in the middle of the vertical frame 100, a feeding traction roller group 1, a first composite roller group 2, a second composite roller group 3, a first die-cutting roller group 4, a first waste discharge guide roller group 5, a third composite roller group 6, a second die-cutting roller group 7, a second waste discharge guide roller group 8, and a discharge traction roller group 9 are arranged sequentially along the material conveying direction. These rollers are used to pull, roll-press, and die-cut the material strips of each layer in the foam product, ultimately achieving the desired shape of composite MPP foam.

[0037] Along the material conveying direction, the upper part of the vertical frame 100 is equipped with a first double-sided adhesive feeding roller 11, a first waste roller 12, a foam feeding roller 13, a second double-sided adhesive feeding roller 14, a second waste roller 15, a third waste roller 16, an adhesive paper feeding roller 17, a fourth waste roller 18, and an OPP tape feeding roller 19. Along the material conveying direction, the lower part of the vertical frame 100 is equipped with a release paper feeding roller 20, a bottom film feeding roller 21, and a bottom film take-up roller 22. These roller assemblies are used to feed and rewind the composite layers of foam products during production, reducing manual labor, achieving automated synchronous production, and improving production efficiency.

[0038] The first double-sided adhesive feeding roller 11 and the first waste roller 12 are located above the feeding traction roller group 1, the release paper feeding roller 20 is located below the feeding traction roller group 1, the foam feeding roller 13 is located above the first composite roller group 2, the second double-sided adhesive feeding roller 14 and the second waste roller 15 are located above the second composite roller group 3, the bottom film feeding roller 21 is located below the second composite roller group 3, the third waste roller 16 is located above the first waste guide roller group 5, the adhesive paper feeding roller 17 is located above the third composite roller group 6, the fourth waste roller 18 and the OPP tape feeding roller 19 are located above the second waste guide roller group 8, the bottom film receiving roller 22 is located below the discharge traction roller group 9, and the discharge end of the discharge traction roller group 9 is provided with a finished product discharge box 10.

[0039] When working, refer to Figure 1 The release paper feeding roller 20 feeds the release paper 102 to the feeding traction roller group 1, and the first double-sided adhesive feeding roller 11 feeds the first double-sided adhesive 103 to the feeding traction roller group 1, with the adhesive side of the first double-sided adhesive 103 facing down. The feeding traction roller group 1 includes a first double-sided adhesive pressure roller 111 and a feeding support roller 112 rotating in opposite directions. Under the combined action of the first double-sided adhesive pressure roller 111 and the feeding support roller 112, the release paper 102 and the first double-sided adhesive 103 are rolled and bonded from the top and bottom sides. The first waste roller 12 is used to collect the first adhesive waste 121 after the first double-sided adhesive 103 and the release paper 102 are peeled off from the feeding traction roller group 1.

[0040] The first composite roller group 2 includes a foam composite pressure roller 211 and a foam composite support roller 212 rotating in opposite directions. The foam feeding roller 13 transfers the MPP foam 104 to the first composite roller group 2. After the first adhesive paper waste 121 is peeled off, the adhesive side of the first double-sided adhesive 103 faces upward. Under the combined action of the foam composite pressure roller 211 and the foam composite support roller 212, the MPP foam 104 and the first double-sided adhesive 103 are rolled and bonded from the top and bottom sides. The composite material layer after lamination at the discharge end of the first composite roller group 2 consists of release paper 102, first double-sided adhesive 103, and MPP foam 104 from bottom to top.

[0041] The second composite roller group 3 includes a double-sided adhesive second pressure roller 311 and a double-sided adhesive composite support roller 312 rotating in opposite directions. A bottom film feeding roller 21 transfers a bottom film 101 to the second composite roller group 3. The bottom film 101 has a thickness of 0.05 mm and is used to support the composite foam product, serving as the die-cutting bottom material. A second double-sided adhesive feeding roller 14 transfers a second double-sided adhesive 105 to the second composite roller group 3, with the adhesive side of the second double-sided adhesive 105 facing down. Under the combined action of the double-sided adhesive second pressure roller 311 and the double-sided adhesive composite support roller 312, the second double-sided adhesive 105 is rolled and bonded to the MPP foam 104 from both the top and bottom. A second waste discharge roller 15 collects the second adhesive waste 151 after the second double-sided adhesive 105 is peeled off from the second composite roller group 3. The composite layers at the discharge end of the second composite roller group 3 consist, from bottom to top, release paper 102, first double-sided adhesive 103, MPP foam 104, and second double-sided adhesive 105.

[0042] The first die-cutting roller group 4 includes a first circular cutter roller 411 and a first die-cutting support roller 412 rotating in opposite directions. Under the roll pressing and die-cutting action of the first circular cutter roller 411, the material layer between the first circular cutter roller 411 and the first die-cutting support roller 412 is roll pressed and die-cut. (Refer to...) Figure 3 As shown, the first circular cutter roller 411 cuts downwards at the L1 line to the release paper 102 layer. Under the guidance of the first row of waste guide rollers 5, the waste material 161 after the first circular cutter roller 411 is collected by the third row of waste rollers 16.

[0043] The third composite roller group 6 includes a paper-adhesive composite pressure roller 611 and a paper-adhesive composite support roller 612 rotating in opposite directions. The paper-adhesive feeding roller 17 transfers the double-sided adhesive paper 106 to the third composite roller group 6. Under the combined action of the paper-adhesive composite pressure roller 611 and the paper-adhesive composite support roller 612, the double-sided adhesive paper 106 and the second double-sided adhesive 105 are rolled and bonded from the top and bottom sides. The composite layers after this stage, from bottom to top, are release paper 102, first double-sided adhesive 103, MPP foam 104, second double-sided adhesive 105, and double-sided adhesive paper 106.

[0044] Furthermore, the second die-cutting roller group 7 includes a second circular cutter roller 711 and a second die-cutting support roller 712 rotating in opposite directions. Under the roll-pressing die-cutting action of the second circular cutter roller 711, the material layer between the second circular cutter roller 711 and the second die-cutting support roller 712 is roll-pressed and die-cut. (Refer to...) Figure 4As shown, the second circular cutter roller 711 cuts downwards at line L2 to the first double-sided adhesive layer 103, and at lines L3 and L4 downwards to the release paper layer 102, ultimately obtaining the desired shape of the composite MPP foam product. The OPP tape feeding roller 19 feeds the OPP tape 107 to the second row of waste guide rollers 8 to adhere the waste material after die-cutting by the second circular cutter roller 711, and collects the OPP tape waste 181 through the fourth row of waste rollers 18. The discharge traction roller group 9 conveys the die-cut composite MPP foam to the finished product discharge box 10 after separation by a peeling knife, and the bottom film receiving roller 22 recycles the bottom film 101.

[0045] Although the preferred embodiments of this utility model have been disclosed above, they are not intended to limit this utility model. Any person skilled in the art can make possible changes and modifications to the technical solutions of this utility model by utilizing the methods and techniques disclosed above without departing from the spirit and scope of this utility model. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solutions of this utility model shall fall within the protection scope of the technical solutions of this utility model.

Claims

1. A circular die-cutting device for composite MPP foam, comprising a vertical frame (100), wherein one side of the vertical frame (100) is provided with multiple roller assemblies distributed in a multi-layered manner in the longitudinal direction, and the other side of the vertical frame (100) is provided with a driving and transmission device, characterized in that, At the same horizontal level in the middle of the vertical frame (100), along the material conveying direction, there are sequentially arranged feeding traction roller group (1), first composite roller group (2), second composite roller group (3), first die-cutting roller group (4), first waste discharge guide roller group (5), third composite roller group (6), second die-cutting roller group (7), second waste discharge guide roller group (8) and discharge traction roller group (9). The upper part of the vertical frame (100) is provided with a first double-sided adhesive feeding roller (11), a first waste roller (12), a foam feeding roller (13), a second double-sided adhesive feeding roller (14), a second waste roller (15), a third waste roller (16), an adhesive paper feeding roller (17), a fourth waste roller (18), and an OPP tape feeding roller (19) in sequence along the material conveying direction. The lower part of the vertical frame (100) is provided with release paper feeding roller (20), bottom film feeding roller (21) and bottom film receiving roller (22) in sequence along the material conveying direction. The first double-sided adhesive feeding roller (11) and the first waste roller (12) are located above the feeding traction roller group (1), the release paper feeding roller (20) is located below the feeding traction roller group (1), the foam feeding roller (13) is located above the first composite roller group (2), the second double-sided adhesive feeding roller (14) and the second waste roller (15) are located above the second composite roller group (3), the bottom film feeding roller (21) is located below the second composite roller group (3), the third waste roller (16) is located above the first waste guide roller group (5), the adhesive paper feeding roller (17) is located above the third composite roller group (6), the fourth waste roller (18) and the OPP tape feeding roller (19) are located above the second waste guide roller group (8), and the bottom film receiving roller (22) is located below the discharge traction roller group (9). The discharge end of the discharge traction roller group (9) is provided with a finished product discharge box (10).

2. The circular die-cutting device for composite MPP foam according to claim 1, characterized in that, The release paper feeding roller (20) feeds the release paper (102) into the feeding traction roller group (1), and the first double-sided adhesive feeding roller (11) feeds the first double-sided adhesive (103) into the feeding traction roller group (1). The feeding traction roller group (1) includes a first double-sided adhesive pressing roller (111) and a feeding roller (112) rotating in opposite directions. Under the combined action of the first double-sided adhesive pressing roller (111) and the feeding roller (112), the release paper (102) and the first double-sided adhesive (103) are rolled and bonded. The first waste discharge roller (12) is used to collect the first adhesive waste (121) after the first double-sided adhesive (103) is peeled off from the feeding traction roller group (1).

3. The circular die-cutting device for composite MPP foam according to claim 2, characterized in that, The first composite roller group (2) includes a foam composite pressure roller (211) and a foam composite support roller (212) rotating in opposite directions. The foam feeding roller (13) transfers the MPP foam (104) to the first composite roller group (2). Under the combined action of the foam composite pressure roller (211) and the foam composite support roller (212), the MPP foam (104) is rolled and bonded to the first double-sided adhesive (103).

4. The circular die-cutting device for composite MPP foam according to claim 3, characterized in that, The second composite roller group (3) includes a double-sided adhesive second pressure roller (311) and a double-sided adhesive composite support roller (312) rotating in opposite directions. The bottom film feeding roller (21) transfers the bottom film (101) to the second composite roller group (3), and the second double-sided adhesive feeding roller (14) transfers the second double-sided adhesive (105) to the second composite roller group (3). Under the combined action of the double-sided adhesive second pressure roller (311) and the double-sided adhesive composite support roller (312), the second double-sided adhesive (105) is rolled and bonded to the MPP foam (104). The second waste discharge roller (15) is used to collect the second adhesive paper waste (151) after the second double-sided adhesive (105) is peeled off from the second composite roller group (3).

5. The circular die-cutting device for composite MPP foam according to claim 4, characterized in that, The first die-cutting roller group (4) includes a first circular cutter roller (411) and a first die-cutting support roller (412) with opposite rotation directions. Under the roll pressing and die-cutting action of the first circular cutter roller (411), the material layer between the first circular cutter roller (411) and the first die-cutting support roller (412) is roll pressed and die-cut. Under the guidance of the first waste guide roller group (5), the waste material layer (161) after the first circular cutter roller (411) is collected by the third waste roller (16).

6. The circular die-cutting device for composite MPP foam according to claim 5, characterized in that, The third composite roller group (6) includes a paper-adhesive composite pressure roller (611) and a paper-adhesive composite support roller (612) rotating in opposite directions. The paper-adhesive feeding roller (17) transfers the double-sided adhesive paper (106) to the third composite roller group (6). Under the combined action of the paper-adhesive composite pressure roller (611) and the paper-adhesive composite support roller (612), the double-sided adhesive paper (106) is rolled and bonded to the second double-sided adhesive (105).

7. The circular die-cutting device for composite MPP foam according to claim 6, characterized in that, The second die-cutting roller group (7) includes a second circular cutter roller (711) and a second die-cutting support roller (712) rotating in opposite directions. Under the roller pressing and die-cutting action of the second circular cutter roller (711), the material layer between the second circular cutter roller (711) and the second die-cutting support roller (712) is roller pressed and die-cut. The OPP tape feeding roller (19) feeds the OPP tape (107) to the second waste guide roller group (8) to stick the waste material after the second circular cutter roller (711) is die-cut, and collects the OPP tape waste material (181) through the fourth waste roller (18).

8. The circular die-cutting device for composite MPP foam according to claim 7, characterized in that, The discharge traction roller group (9) conveys the die-cut composite MPP foam to the finished product discharge box (10), and the bottom film receiving roller (22) recycles the bottom film (101).

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