Non-woven fabric multilayer composite reinforcing tool
By using a bottom dust collection and top cleaning mechanism in a multi-layer composite reinforcement tool for nonwoven fabrics, combined with an adhesive and pressing mechanism, the problem of surface impurities affecting the composite quality of nonwoven fabrics is solved, achieving high-quality adhesive bonding and reinforcement of nonwoven fabrics.
Patent Information
- Application Number
- CN202520262520.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In existing nonwoven multilayer composite processes, when reinforcement is achieved through adhesive bonding, surface impurities affect the bonding effect, leading to a decrease in composite quality.
The nonwoven fabric multi-layer composite reinforcement tool includes a bottom dust collection mechanism, a top cleaning mechanism, an adhesive mechanism, and a pressing mechanism. By cleaning and spraying atomized adhesive and glue, it ensures that the nonwoven fabric surface is clean and evenly bonded.
This effectively avoids impurities affecting the reinforcement effect, ensures the quality of nonwoven fabric composite, and improves bonding strength and composite quality.
Smart Images
Figure CN223904693U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to non - woven fabric composite technical field especially non - woven fabric multilayer composite reinforcing tool. BACKGROUND
[0002] Non - woven fabric, also known as non - woven fabric, is a kind of cloth that does not pass through spinning and weaving process, directly short fiber or filament is formed into net structure through random or directional arrangement, and then is made into cloth through reinforcement process, and non - woven fabric composite is the process that non - woven fabric is used as base material and is compounded with other materials (such as film, paper, fiber web etc.), the composite processing can be realized by various methods, such as hot-pressing composite, adhesive composite, needle punching composite etc., through composite processing, the advantages of non - woven fabric and other materials can be fully utilized, and the overall performance and function of material are improved, among them, in order to pursue non - woven fabric composite quality, non - woven fabric multilayer composite reinforcement is very important.
[0003] In the existing multilayer non - woven fabric composite process, most of the reinforcement of non - woven fabric multilayer composite is realized by the way of glue bonding, however, this single reinforcement mode has some limitations in practical application, because the surface of non - woven fabric is easy to adsorb dust, fiber debris and other impurities, the existence of these small particles can seriously affect the bonding effect of glue, dust and impurities not only can reduce the adhesion between glue and non - woven fabric, but also can form an isolation layer, hinder the full contact and infiltration between glue and non - woven fabric fiber, in this way, even if the glue itself has good bonding performance, it is also difficult to form a firm adhesive layer in the non - woven fabric multilayer composite structure, thereby reducing the non - woven fabric composite quality, and the practicality is poor. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at solving the problems that the reinforcement of non - woven fabric multilayer composite is realized by the way of glue bonding in the prior art multilayer non - woven fabric composite process, thereby the impurities adsorbed on the surface of non - woven fabric can affect the reinforcement effect, and further reduce the non - woven fabric composite quality, and the non - woven fabric multilayer composite reinforcing tool is provided.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: non - woven fabric multilayer composite reinforcing tool, including base, the base top end is installed with shell, the shell one end is sequentially penetrated and arranged with three groups of notches from top to bottom, and the other end of shell is penetrated and arranged with a group of through openings, three groups The notch is inserted with non - woven fabric, the inner wall of shell is installed with two groups of guide columns, and the outer wall of two groups The guide column is respectively contacted with the bottom end of the two groups of non - woven fabric located above, and further includes:
[0006] The adhesion mechanism and the pressing mechanism are arranged inside the shell and are respectively used for adhesion and pressing of the three groups of non-woven fabrics, the adhesion mechanism is located between the three groups of notches and the pressing mechanism, the three groups of non-woven fabrics pass through the adhesion mechanism and the pressing mechanism in sequence and extend outward through the through hole of the shell;
[0007] The bottom dust collecting mechanism is arranged at one end of the shell and is used for collecting dust at the bottom of the three groups of non-woven fabrics before compounding;
[0008] The top cleaning mechanism comprises a first fixed column, a second fixed column and a third fixed column, the first fixed column, the second fixed column and the third fixed column are all mounted on the inner wall of the shell and are respectively located above the three groups of non-woven fabrics, the first fixed column, the second fixed column and the third fixed column are all located between the three groups of notches and the adhesion mechanism, the bottom end of the first fixed column, the second fixed column and the third fixed column is provided with a dust brushing assembly for brushing dust at the top of the non-woven fabric, the three groups of dust brushing assemblies are the same in structure, and the shell is provided with a collecting assembly for collecting the brushed dust.
[0009] Preferably, the first fixed column, the second fixed column and the third fixed column are all longer than the width of the three groups of non-woven fabrics and are parallel to the corresponding non-woven fabrics, and the first fixed column and the second fixed column are oppositely inclined.
[0010] Preferably, the dust brushing assembly on the first fixed column comprises a connecting block, gears are mounted at both ends of the connecting block, two motors are mounted inside the connecting block for driving the two gears to rotate, a belt is commonly sleeved on the connecting block and the two gears, a plurality of notches are formed in the inner side of the belt, the belt is engaged with the gears through the plurality of notches, a brush is mounted at the bottom end of the belt, a limiting strip is mounted on the outer wall of the connecting block, the limiting strip is located between the brush and the connecting block, and the top end of the limiting strip is in contact with the bottom end of the belt.
[0011] Preferably, the collecting assembly comprises a collecting drawer, the collecting drawer is inserted through one side of the shell, and the collecting drawer is located below the three groups of non-woven fabrics, and the opening length of the top end of the collecting drawer is greater than the width of the non-woven fabric.
[0012] Preferably, the adhesion mechanism comprises two groups of receiving shells, both of which are fixedly installed on the inner wall of the shell and are located between each two adjacent non-woven fabrics, the inside of the receiving shell is provided with a partition plate, and the inside of the receiving shell is divided into upper and lower parts by the partition plate, the upper part is an upper cavity, and the lower part is a lower cavity, the upper cavity is provided with atomized adhesive, the lower cavity is provided with glue, and a connecting pipe is fixedly installed on one side of the inner wall of the upper and lower cavities, one end of the two connecting pipes penetrates the inner wall of the shell and is connected with an external atomizing device and a glue injection device respectively, a plurality of atomizing nozzles are uniformly installed at the top end of the receiving shell, and a plurality of glue nozzles are uniformly installed at the bottom end of the receiving shell.
[0013] Preferably, the pressing mechanism comprises a fixed hot pressing roller group and two groups of electric telescopic rods, the fixed hot pressing roller group is installed at the top end of the base, and the two groups of electric telescopic rods are symmetrically fixedly installed on the inner top wall of the shell, and the output ends of the two groups of electric telescopic rods are fixedly connected with a pressing and heating roller group, the pressing and heating roller group is located directly above the fixed hot pressing roller group, and the three groups of non-woven fabrics are located between the pressing and heating roller group and the fixed hot pressing roller group, and the bottom dust collecting mechanism comprises three groups of dust collecting shells, the three groups of dust collecting shells are installed at one end of the shell, and the three groups of dust collecting shells are located below the three groups of notches respectively.
[0014] Compared with the prior art, the utility model has the advantages that:
[0015] 1、The bottom dust collecting mechanism and the top cleaning mechanism cooperate with each other, can clean and collect the dust on the top and bottom of the non-woven fabric before compounding, and complete the adhesion and reinforcement of the multi-layered non-woven fabric with the adhesion mechanism, thereby effectively avoiding the influence of the dust adsorbed on the surface of the non-woven fabric on the reinforcement effect of the non-woven fabric, and effectively guaranteeing the compounding quality of the non-woven fabric.
[0016] 2、The adhesion mechanism can spray atomized adhesive on the lower surface of the non-woven fabric above the receiving shell and spray a uniform glue layer on the upper surface of the non-woven fabric below the receiving shell, since the two groups of non-woven fabrics above are in an inclined state, compared with spraying a glue layer on the lower surface of the inclined non-woven fabric, spraying atomized adhesive can avoid the movement of the sprayed glue along the lower surface of the inclined non-woven fabric, thereby avoiding the uneven thickness of the glue due to the movement of the glue, effectively guaranteeing the bonding strength of the compounded non-woven fabric, and further guaranteeing the compounding quality of the non-woven fabric. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the whole structure schematic view of the non-woven fabric multi-layer compounding and reinforcing tool of the utility model;
[0018] Figure 2The structure schematic view of the non-woven fabric multi-layer composite reinforcing tool from another perspective is provided in the utility model.
[0019] Figure 3 The structure schematic view of the non-woven fabric multi-layer composite reinforcing tool from another perspective is provided in the utility model.
[0020] Figure 4 The structure schematic view of the non-woven fabric multi-layer composite reinforcing tool from another perspective is provided in the utility model.
[0021] Figure 5 The structure schematic view of the non-woven fabric multi-layer composite reinforcing tool from another perspective is provided in the utility model.
[0022] Figure 6 The structure schematic view of the non-woven fabric multi-layer composite reinforcing tool from another perspective is provided in the utility model.
[0023] In the figure: 1, base; 2, shell; 3, ash collection shell; 4, collection drawer; 5, fixed hot roller group; 6, compression heating roller group; 7, storage shell; 8, atomizing nozzle; 9, glue nozzle; 10, first fixed column; 11, gear; 12, belt 12; 13, brush; 14, second fixed column; 15, third fixed column. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0025] Refer to Figures 1 to 6The utility model provides a non - woven fabric multilayer composite reinforcing tool, including base 1, the top of base 1 is equipped with shell 2, one end of shell 2 is sequentially penetrated from top to bottom and is equipped with three groups of notches, and one end of shell 2 is penetrated and is equipped with a group of through -opening, two groups of guide columns are installed on the inner wall of shell 2, and the outer wall of two groups of guide columns is respectively contacted with the bottom of two groups of non - woven fabrics located above, the setting of two groups of guide columns can guide and position the two groups of non - woven fabrics located above, ensure that non - woven fabric can along the predetermined path when moving or spreading, make two groups of non - woven fabrics above can keep the inclined state simultaneously, thereby ensure that there is a certain interval between three groups of non - woven fabrics, thereby avoid unnecessary three groups of non - woven fabrics to fit or overlap, non - woven fabric is inserted on three groups of notches, and the inside of shell 2 is provided with bonding mechanism and pressure mechanism, is used for making three groups of non - woven fabrics to realize bonding and is used for making three groups of non - woven fabrics to be pressed tightly respectively, bonding mechanism is located between three groups of notches and pressure mechanism, three groups of non - woven fabrics pass bonding mechanism and pressure mechanism in turn and extend outwardly through the through -opening of shell 2, bonding mechanism includes two groups of receiving shell 7, two groups of receiving shell 7 are fixedly installed on the inner wall of shell 2, and two groups of receiving shell 7 are located between every two groups of adjacent non - woven fabrics respectively, the inside of receiving shell 7 is provided with a baffle, and the inside of receiving shell 7 is divided into upper and lower two parts by the baffle, the upper part is upper chamber, and the lower part is lower chamber, atomization adhesive is arranged in the upper chamber, and glue is arranged in the lower chamber, connecting pipe is fixedly installed on the inner wall of one side of upper chamber and lower chamber, one end of two groups of connecting pipe penetrates the inner wall of shell 2 and is connected with external atomization device and glue injection device respectively, a plurality of atomization nozzles 8 are uniformly installed on the top of receiving shell 7, and a plurality of glue nozzles 9 are uniformly installed on the bottom of receiving shell 7, pressure mechanism includes fixed hot press roller group 5 and two groups of electric telescopic rods, fixed hot press roller group 5 is installed at the top of base 1, two groups of electric telescopic rods are symmetrically fixedly installed on the inner top wall of shell 2, and the output end of two groups of electric telescopic rods is fixedly connected with pressure heating roller group 6, pressure heating roller group 6 is located directly above fixed hot press roller group 5, and three groups of non - woven fabrics are located between pressure heating roller group 6 and fixed hot press roller group 5.
[0026] Three groups of non-woven fabrics enter from three groups of notches on one end of the shell 2, among the three groups of non-woven fabrics entering the shell 2, two groups of non-woven fabrics (referring to the two groups of non-woven fabrics located above) are positioned by the guide column inside the shell 2, at this time, the two groups of non-woven fabrics located above are in an inclined state, the inner wall of the shell 2 between the two adjacent groups of non-woven fabrics is fixed with a receiving shell 7, through the atomizing spray head 8 on the receiving shell 7, the lower surface of the non-woven fabric above the receiving shell 7 can be sprayed with atomized adhesive, through the glue spray head 9 on the receiving shell 7, the upper surface of the non-woven fabric below the receiving shell 7 can be sprayed with a uniform glue layer, since the two groups of non-woven fabrics located above are in an inclined state, compared to spraying a glue layer on the lower surface of the inclined non-woven fabric, spraying atomized adhesive can avoid the sprayed glue moving along the lower surface of the inclined non-woven fabric due to spraying glue, thereby avoiding the uneven thickness of the glue due to the movement of the glue, effectively ensuring the bonding strength of the non-woven fabric after compounding, that is, effectively ensuring the compounding quality of the non-woven fabric, after the spraying of the three groups of non-woven fabrics is completed, they will be concentrated between the fixed hot press roller group 5 and the compression heating roller group 6, and the compression heating roller group 6 will be controlled to move downward by the electric telescopic rod, thereby completing the compression and lamination of the three groups of non-woven fabrics, that is, completing the compounding and fixing of the three groups of non-woven fabrics, and the compounded non-woven fabric is finally output to the outside through the through hole on the shell 2.
[0027] With reference to Figures 1 to 5The bottom dust collecting mechanism is arranged at one end of the shell 2 and is used for collecting dust on the bottom of the three groups of non-woven fabrics before compounding. The bottom dust collecting mechanism comprises three groups of dust collecting shells 3, which are all installed at one end of the shell 2 and are respectively located below the three groups of notches. A top cleaning mechanism is arranged in the shell 2 and is used for cleaning and collecting dust on the top of the three groups of non-woven fabrics before compounding. The top cleaning mechanism comprises a first fixed column 10, a second fixed column 14, a third fixed column 15 and a collecting drawer 4. The first fixed column 10, the second fixed column 14 and the third fixed column 15 are all installed on the inner wall of the shell 2 and are respectively located above the three groups of non-woven fabrics. The lengths of the first fixed column 10, the second fixed column 14 and the third fixed column 15 are all greater than the widths of the three groups of non-woven fabrics, and the first fixed column 10, the second fixed column 14 and the third fixed column 15 are all located between the three groups of notches and the bonding mechanism. The first fixed column 10, the second fixed column 14 and the third fixed column 15 are respectively parallel to the corresponding non-woven fabrics. The first fixed column 10 and the second fixed column 14 are oppositely inclined. The bottom ends of the first fixed column 10, the second fixed column 14 and the third fixed column 15 are all provided with dust brushing assemblies for brushing dust off the top of the non-woven fabrics. The dust brushing assemblies on the first fixed column 10 comprise a connecting block, gears 11 are installed at both ends of the connecting block, two motors for driving the two gears 11 to rotate are installed in the connecting block, a belt 12 is jointly sleeved on the connecting block and the two gears 11, a plurality of notches are formed in the inner side of the belt 12, the belt 12 is engaged with the gears 11 through the plurality of notches, a brush 13 is installed at the bottom end of the belt 12, a limiting strip is installed on the outer wall of the connecting block, the limiting strip is located between the brush 13 and the connecting block, and the top end of the limiting strip is in contact with the bottom end of the belt 12. A collecting assembly is arranged on the shell 2 and is used for collecting the brushed dust. The collecting assembly comprises the collecting drawer 4, the collecting drawer 4 is inserted through one side of the shell 2, and the collecting drawer 4 is located below the three groups of non-woven fabrics. The top end of the collecting drawer 4 is longer than the width of the non-woven fabrics.
[0028] When the three groups of non-woven fabrics enter the shell 2 from the three groups of notches at one end of the shell 2, since the three groups of notches on the shell 2 are all provided with the dust collecting shells 3 below, the dust on the lower surface of the non-woven fabrics entering the shell 2 will be scraped off by the bottom wall edges of the notches and finally fall into the dust collecting shells 3, so that the bottom dust of the non-woven fabrics before compounding is cleaned and collected.
[0029] In the utility model, the three groups of non-woven fabrics enter from the three groups of notches at one end of the shell 2, since the three groups of notches on the shell 2 are all provided with the dust collecting shells 3 below, the dust on the lower surface of the non-woven fabrics entering the shell 2 will be scraped off by the bottom wall edges of the notches and finally fall into the dust collecting shells 3, so that the bottom dust of the non-woven fabrics before compounding is cleaned and collected, two groups of non-woven fabrics (point to the two groups of non-woven fabrics located above) in the three groups of non-woven fabrics entering the shell 2 are positioned by the guide columns in the shell 2, at this moment, the two groups of non-woven fabrics located above are in the inclined state.
[0030] The receiving shell 7 is fixed on the inner wall of the shell 2 between the two adjacent groups of non-woven fabrics, the atomized adhesive can be sprayed on the lower surface of the non-woven fabric above the receiving shell 7 through the atomizing nozzle 8 on the receiving shell 7, and the uniform glue layer can be sprayed on the upper surface of the non-woven fabric below the receiving shell 7 through the glue nozzle 9 on the receiving shell 7, since the two groups of non-woven fabrics above are in an inclined state, compared with spraying the glue layer on the lower surface of the inclined non-woven fabric, spraying the atomized adhesive can avoid the sprayed glue moving along the lower surface of the inclined non-woven fabric, thereby avoiding the uneven thickness of the glue due to the movement of the glue, effectively ensuring the bonding strength of the non-woven fabric after compounding, that is, effectively ensuring the compounding quality of the non-woven fabric, after the spraying of the three groups of non-woven fabrics is completed, the three groups of non-woven fabrics will be concentrated between the fixed hot pressing roller group 5 and the pressing and heating roller group 6, and the pressing and heating roller group 6 is controlled to move downward through the electric telescopic rod, so as to complete the pressing and fitting of the three groups of non-woven fabrics, that is, the compounding and fixing of the three groups of non-woven fabrics, and the compounded non-woven fabric is finally output to the outside through the through hole on the shell 2.
[0031] When the non-woven fabric is transported in the shell 2, the two groups of motors in the connecting block are controlled to drive the two groups of gears 11 to rotate, the rotation of the gears 11 will drive the belt 12 and the brush 13 to rotate, when the non-woven fabric passes through the brush 13, the dust on the upper surface of the non-woven fabric will be blocked by the brush 13 and transported to the two ends of the non-woven fabric along the transmission track of the brush 13, since the lengths of the first fixed column 10, the second fixed column 14 and the third fixed column 15 are all greater than the widths of the three groups of non-woven fabrics, the dust attached to the upper surface of the non-woven fabric will be brushed off and fall into the collecting drawer 4, thereby realizing the cleaning and collection of the dust on the top of the non-woven fabric before compounding, since the first fixed column 10 and the second fixed column 14 are oppositely inclined, the dust brushed off by the dust brushing assembly on the first fixed column 10 and the second fixed column 14 will not interfere, thereby effectively ensuring the smooth progress of the process of cleaning and collecting the dust on the top of the non-woven fabric, and since the first fixed column 10, the second fixed column 14 and the third fixed column 15 are parallel to the corresponding non-woven fabrics respectively, and the two groups of non-woven fabrics above are in an inclined state, the movement tracks of the two groups of brushes 13 above will be in a state from high to low, thereby being more conducive to the dust on the two groups of brushes 13 above falling into the collecting drawer 4.
[0032] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A multi-layer composite reinforcement tool for non-woven fabric, comprising a base (1), wherein a shell (2) is installed on the top of the base (1), one end of the shell (2) is provided with three sets of slots running from top to bottom, and the other end of the shell (2) is provided with a through-hole, and non-woven fabric is inserted into each of the three sets of slots; two sets of guide posts are installed on the inner wall of the shell (2), and the outer walls of the two sets of guide posts respectively contact the bottom ends of the two sets of non-woven fabric located above, characterized in that, Also include: The adhesion mechanism and the compression mechanism are arranged inside the shell (2), respectively for enabling the three groups of non-woven fabric to achieve adhesion and for enabling the three groups of non-woven fabric to be compressed and fitted, the adhesion mechanism is located between the three groups of notches and the compression mechanism, the three groups of non-woven fabric pass through the adhesion mechanism and the compression mechanism in turn, and extend outward through the through port of the shell (2); The bottom dust collection mechanism is arranged at one end of the shell (2), and is used for collecting the dust at the bottom of the three groups of non-woven fabric before compounding; The top cleaning mechanism includes a first fixed column (10), a second fixed column (14) and a third fixed column (15), which are all installed on the inner wall of the shell (2) and are located above the three groups of non-woven fabric, respectively, the first fixed column (10), the second fixed column (14) and the third fixed column (15) are located between the three groups of notches and the adhesion mechanism, the bottom end of the first fixed column (10), the second fixed column (14) and the third fixed column (15) is provided with a dust brushing assembly for brushing the dust on the top of the non-woven fabric, the three groups of dust brushing assemblies are the same structure, and the shell (2) is provided with a collecting assembly for collecting the brushed dust.
2. The nonwoven multi-layer composite reinforcement tool of claim 1, wherein, The length of the first fixed column (10), the second fixed column (14) and the third fixed column (15) is greater than the width of the three groups of non-woven fabric, and they are parallel to the corresponding non-woven fabric, respectively, the first fixed column (10) and the second fixed column (14) are oppositely inclined to each other.
3. The nonwoven multi-layer composite reinforcement tool of claim 2, wherein, The dust brushing assembly on the first fixed column (10) includes a connecting block, both ends of the connecting block are provided with a gear (11), and two groups of motors are installed inside the connecting block to drive the rotation of the two groups of gears (11), a belt (12) is commonly sleeved on the connecting block and the two groups of gears (11), a plurality of notches are formed in the inner side of the belt (12), and the belt (12) is engaged with the gear (11) through the plurality of notches, a brush (13) is installed at the bottom end of the belt (12), a limiting strip is installed on the outer wall of the connecting block, the limiting strip is located between the brush (13) and the connecting block, and the top end of the limiting strip is in contact with the bottom end of the belt (12).
4. The nonwoven multi-layer composite reinforcement tool of claim 3, wherein, The collecting assembly includes a collecting drawer (4), the collecting drawer (4) is inserted through one side of the shell (2), and the collecting drawer (4) is located below the three groups of non-woven fabric, the top opening length of the collecting drawer (4) is greater than the width of the non-woven fabric.
5. The nonwoven multi-layer composite reinforcement tool of claim 1, wherein, The adhesion mechanism comprises two groups of receiving shells (7), both of which are fixedly installed on the inner wall of the shell (2) and are located between each two groups of adjacent non-woven fabrics, the receiving shell (7) is provided with a partition plate inside, and the inside of the receiving shell (7) is divided into upper and lower parts by the partition plate, the upper part is an upper cavity, and the lower part is a lower cavity, the upper cavity is provided with an atomized adhesive, the lower cavity is provided with glue, and the inner wall of one side of the upper and lower cavities is fixedly provided with a connecting pipe, one end of the two groups of connecting pipes penetrates the inner wall of the shell (2) and is connected with an external atomizing device and a glue injection device respectively, a plurality of atomizing nozzles (8) are uniformly installed at the top end of the receiving shell (7), and a plurality of glue nozzles (9) are uniformly installed at the bottom end of the receiving shell (7).
6. The nonwoven multi-layer composite reinforcement tool of claim 1, wherein, The pressing mechanism comprises a fixed hot pressing roller group (5) and two groups of electric telescopic rods, the fixed hot pressing roller group (5) is installed at the top end of the base (1), the two groups of electric telescopic rods are symmetrically fixedly installed on the inner top wall of the shell (2), and the output ends of the two groups of electric telescopic rods are fixedly connected with a pressing and heating roller group (6), the pressing and heating roller group (6) is located directly above the fixed hot pressing roller group (5), and the three groups of non-woven fabrics are located between the pressing and heating roller group (6) and the fixed hot pressing roller group (5), and the bottom dust collecting mechanism comprises three groups of dust collecting shells (3), the three groups of dust collecting shells (3) are installed at one end of the shell (2), and the three groups of dust collecting shells (3) are located below the three groups of notches respectively.