CN117681539A - Multifunctional compounding machine for compounding and processing multi-layer fabric - Google Patents

Multifunctional compounding machine for compounding and processing multi-layer fabric Download PDF

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Publication number
CN117681539A
CN117681539A CN202311664421.XA CN202311664421A CN117681539A CN 117681539 A CN117681539 A CN 117681539A CN 202311664421 A CN202311664421 A CN 202311664421A CN 117681539 A CN117681539 A CN 117681539A
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layer
machine
liquid
roller
body part
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CN202311664421.XA
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Chinese (zh)
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顾珂里
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Yancheng Institute of Industry Technology
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Yancheng Institute of Industry Technology
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Priority to CN202311664421.XA priority Critical patent/CN117681539A/en
Publication of CN117681539A publication Critical patent/CN117681539A/en
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Abstract

The invention discloses a multifunctional compound machine for compound processing of multi-layer fabrics, which relates to the field of composite material manufacturing equipment, and comprises the following components: the machine head part is of a multi-layer compound structure, each layer of the machine head part comprises a plurality of cloth rolling roller shafts arranged along the axial direction, a liquid adhesive groove is arranged between adjacent cloth rolling roller shafts, two liquid feeding rollers are arranged above the liquid adhesive groove along the vertical direction, and foam baffles are arranged on one side or two sides of the liquid feeding rollers; the mucus conveying structure is connected with the mucus groove and the foam baffle; the vehicle body part is of a box structure, the inside of the vehicle body part comprises a plurality of heating rollers, and the vehicle head part is connected with the vehicle body part; the tail part is connected with the vehicle body part and comprises a plurality of cooling rollers, and the discharge end of the tail part is connected with a finished cloth roller shaft; the multifunctional compound machine is a one-stop multifunctional compound machine capable of carrying out multiple compound processing, and more than three layers of fiber and fabric materials are formed at one time, so that the efficiency is improved.

Description

Multifunctional compounding machine for compounding and processing multi-layer fabric
Technical Field
The invention belongs to the field of composite material manufacturing equipment, and particularly relates to a multifunctional compounding machine for compounding and processing multi-layer fabrics.
Background
Composite materials are broadly defined as materials that combine two or more materials having different physical properties to form a new material that meets certain property requirements. The properties of the composite material are superior to those of the monomer material from which it is made.
In the prior art, most of the fiber and fabric are bonded by using an adhesive for a coating machine, or are compounded by using heat energy or an adhesive by using a two-roll or three-roll compounding machine, and the multilayer material is often compounded for two times or more by using the same compounding equipment, so that the production efficiency is affected. The invention discloses a foam coating composite high-temperature-resistant filter material and a preparation method thereof (patent number ZL201710480248.6, which is authorized) of the applicant, and discloses a technology which comprises a base cloth layer and two non-woven cloth layers, wherein the base cloth and fiber webs covered on the base cloth and the fiber webs are repeatedly penetrated up and down at high speed by needling or hydroentangling in the preparation of the filter material, so that the fibers are broken, the strength of the filter material is reduced, and the composite high-temperature-resistant filter material is compounded by using an adhesive between the base cloth layers and the two non-woven cloth layers through a foam coating method. The patent achieves the aims of avoiding damage to the fiber and not damaging the fiber, but does not relate to the improvement of the composite processing equipment, and the coating machine is still required to be used for carrying out secondary repeated bonding, so that the aim is achieved, but the production efficiency is not ideal.
The novel functional polymer fiber and composite material preparation technology is a high and new technology field supported by national emphasis, and the hysteresis of preparation equipment is one of the bottlenecks for restricting the innovation and development of the composite material field.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a multifunctional compound machine for compound processing of multi-layer fabrics.
In order to achieve the above object, the present invention provides a multifunctional compound machine for multi-layer fabric compound processing, comprising:
the machine head part is of a multi-layer compound structure, each layer of the machine head part comprises a plurality of cloth rolling roller shafts arranged along the axial direction, a liquid sticking groove is arranged between adjacent cloth rolling roller shafts, two liquid feeding rollers are arranged above the liquid sticking groove along the vertical direction, and foam baffles are arranged on one side or two sides of each liquid feeding roller;
a mucous delivery structure connected to the mucous tank and the foam baffle;
the automobile body part is of a box structure, the inside of the automobile body part comprises a plurality of heating rollers, and the discharging end of the automobile head part is connected with the feeding end of the automobile body part;
the automobile body part comprises a tail part, wherein a feeding end is connected with a discharging end of the automobile body part, the tail part comprises a plurality of cooling rollers, and the discharging end of the tail part is connected with a finished cloth roller shaft.
Optionally, a first two-roller rolling mill is arranged between each layer of cloth rolling roller shafts, and a second two-roller rolling mill is respectively arranged at the feeding end and the discharging end of the vehicle body part.
Optionally, the foam baffle is arranged in an inverted eight shape on two sides of the liquid feeding roller.
Optionally, the head portion further comprises a crawler conveyor.
Optionally, the mucus conveying structure comprises a mucus storage tank and a foam generator, wherein a first liquid outlet of the mucus storage tank is connected with the mucus tank, and a second liquid outlet of the mucus storage tank is connected with the foam baffle through the foam generator.
Optionally, the two liquid feeding rollers are respectively a rubber roller and a steel roller, and the outer surface of the steel roller is uneven.
Optionally, the device further comprises an operation table part and a transmission part which are arranged oppositely.
Optionally, the wall of the mucus tank is of a sandwich structure, and a heating pipe is arranged in the jacket.
Optionally, the side wall of the box body of the car body part is a double-layer metal plate, and a heat insulation layer is filled between the metal plates.
Optionally, the rotation of all the heating rollers is consistent, and the rotation direction of all the cooling rollers is inconsistent.
The invention provides a multifunctional compound machine for compound processing of multi-layer fabrics, which has the beneficial effects that:
1. the multifunctional compounding machine can simply compound fibers and fabrics by using common adhesives, is more suitable for multi-layer adhesion by adopting complex processes such as foam coating, hot melt adhesion and the like, and can also simultaneously carry out film coating processing such as surface lamination microporous films, nano carbon films and the like;
2. the multifunctional composite machine can easily control the viscosity and the coating amount of the adhesive liquid, carry out light-weight composite of low liquid supply, lighten the unit weight of the composite material, reduce the manufacturing cost and greatly improve the mechanical property of the composite material;
3. the multifunctional compound machine can be suitable for processing various engineering base fabrics, can also be used for compounding high-end environment-friendly filter materials and the like, and is expected to play a larger role in the future light weight process of industries such as transportation, construction and the like.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a schematic structural view of a multifunctional complex machine for multi-layer fabric complex processing according to one embodiment of the present invention.
FIG. 2 illustrates a state diagram of a multifunctional compounding machine for multi-layer fabric compounding processing to compound a flexible discontinuous material and a large roll of fabric material, according to one embodiment of the present invention.
Fig. 3 shows a schematic structural view of a first viscous liquid tank according to an embodiment of the present invention.
Fig. 4 shows a schematic structural view of a second viscous liquid tank according to an embodiment of the present invention.
Fig. 5 shows a schematic structural view of a third viscous liquid tank according to an embodiment of the present invention.
FIG. 6 illustrates a schematic diagram of the connection of a mucous delivery structure to a mucous tank and foam baffle in accordance with an embodiment of the present invention.
Fig. 7 shows a schematic structural view of a heating cabinet according to an embodiment of the present invention.
Fig. 8 shows a schematic structural view of a cooling system according to an embodiment of the present invention.
Reference numerals illustrate:
1. a first cloth roller shaft; 2. a second cloth rolling roller shaft; 3. a third cloth rolling roller shaft; 4. a fourth cloth rolling roller shaft; 5. a fifth cloth rolling roller shaft; 6. a first viscous liquid tank; 7. a first liquid feed roller; 8. a second liquid feeding roller; 9. a second viscous liquid tank; 10. a third liquid feeding roller; 11. a fourth liquid feeding roller; 12. a third viscous liquid tank; 13. a fifth liquid feeding roller; 14. a sixth liquid feeding roller; 15. a first foam baffle; 16. a second foam baffle; 17. a third foam baffle; 18. a fourth foam baffle; 19. a first movable foam baffle; 20. a second movable foam baffle; 21. a third movable foam baffle; 22. a fourth movable foam baffle; 23. a mucus storage tank; 24. a foam generator; 25. a heating box; 26. a first heated roller; 27. a second heated roller; 28. a third heating roller; 29. a fourth heating roller; 30. a fifth heating roller; 31. a cooling system; 32. a first two-roll mill; 33. a second two-roll mill; 34. a third two-roll mill; 35. a fourth two-roll mill; 36. a finished product cloth roller; 37. a crawler conveyor.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a multifunctional compound machine for compound processing of multi-layer fabrics, which comprises:
the machine head part is of a multi-layer compound structure, each layer of the machine head part comprises a plurality of cloth rolling roller shafts arranged along the axial direction, a liquid adhesive groove is arranged between adjacent cloth rolling roller shafts, two liquid feeding rollers are arranged above the liquid adhesive groove along the vertical direction, and foam baffles are arranged on one side or two sides of the liquid feeding rollers;
the mucus conveying structure is connected with the mucus groove and the foam baffle;
the vehicle body part is of a box structure, the inside of the vehicle body part comprises a plurality of heating rollers, and the discharging end of the vehicle head part is connected with the feeding end of the vehicle body part;
the feeding end of the tail part is connected with the discharging end of the car body part, the tail part comprises a plurality of cooling rollers, and the discharging end of the tail part is connected with a finished cloth roller shaft.
Specifically, the multifunctional compound machine comprises a headstock part, a car body part and a car tail part, wherein the headstock part is of a multi-layer compound structure, each layer can be provided with one or more cloth rolling roller shafts, a viscose tank and a liquid feeding roller are arranged between the cloth rolling roller shafts, foam baffles are arranged on one side or two sides of the liquid feeding roller, and thus when fibers or fabrics rotate along with the liquid feeding roller, viscose liquid or foam adhesive liquid can be coated on the surface of a material; then, after each layer of material is compounded together, the composite material containing certain moisture is heated and dried through heating and cooling of a vehicle body part and a vehicle tail part, so that the moisture is removed, and a hot melting compounding process can be realized; and finally, rolling the composite material by a finished product cloth rolling roller shaft.
Optionally, a first two-roller rolling mill is arranged between each layer of cloth roller shafts, and a second two-roller rolling mill is respectively arranged at the feeding end and the discharging end of the vehicle body part.
Specifically, a first two-roll mill is arranged between two layers of cloth roller shafts, so that a cloth layer with mucus attached on the upper layer and a cloth layer with mucus attached on the lower layer are respectively adhered to the upper side and the lower side of a cloth layer of the first two-roll mill, and the cloth layer is compounded; then, the woven fabric layer is extruded by a second two-roll mill before and after entering the car body part, so that the composite strength is increased, and the heating and cooling effects are ensured.
Optionally, the foam baffle is arranged in an inverted eight shape on two sides of the liquid feeding roller.
Specifically, the foam baffles can be arranged on one side or two sides of the liquid feeding roller, and the foam baffles are detachably connected, so that when the mucilage trough adopts a full-coating mode to coat mucilage on the material, the foam baffles do not work; when the mucus groove adopts a foam coating mode to coat mucus on a material, the generated foam-shaped adhesive liquid is conveyed to a foam baffle plate through a pipeline, the liquid feeding roller rotates in the same direction with the fiber material or the fabric material, and the adhesive liquid is coated on the front surface or the back surface of the material through the foam baffle plate.
Optionally, the head portion further comprises a crawler conveyor.
Specifically, flexible discontinuous materials can be placed on the crawler conveyor, and when the crawler and the cloth roller shaft of the headstock part synchronously move in opposite directions, the discontinuous materials can be compounded with other fabrics or fibers.
Optionally, the mucus conveying structure comprises a mucus storage tank and a foam generator, a first liquid outlet of the mucus storage tank is connected with the mucus tank, and a second liquid outlet of the mucus storage tank is connected with the foam baffle through the foam generator.
Specifically, the mucus conveying structure has two conveying modes, namely, a pre-prepared adhesive liquid is conveyed into a mucus storage tank and is directly conveyed into the mucus storage tank through a first liquid outlet, and a full-coating process is implemented; and secondly, conveying the bonding liquid to a foam generator through a second liquid outlet, changing the bonding liquid from liquid into foam, conveying the foam bonding liquid to a foam baffle plate, and implementing a foam coating process.
Optionally, the two liquid feeding rollers are respectively a rubber roller and a steel roller, and the outer surface of the steel roller is uneven.
Specifically, two liquid feeding rollers are arranged on each adhesive liquid groove, the liquid feeding rollers are arranged in the vertical direction, the fabric passes through the two liquid feeding rollers, the liquid feeding rollers are arranged into a rubber roller and another steel roller, patterns and dots are carved on the surface of the steel roller to form a concave-convex surface, and when the adhesive liquid feeding rollers are fully coated in real time, the fabric layer surface can form discontinuous punctiform mucus, so that the adhesive liquid coating amount is reduced, and the composite fabric has better air permeability.
Optionally, the device further comprises an operation table part and a transmission part which are arranged oppositely.
Specifically, the multifunctional compound machine can be set as right-hand equipment, the operation panel part is arranged on the right side of the whole compound machine, auxiliary facilities such as a transmission part and the like are arranged on the left side of the compound machine, in addition, the operation panel part of the head part is arranged outside the right-side operation aisle, and the display screens of the operation panel parts of the body part and the tail part are also arranged on the right side.
Optionally, the wall of the mucus groove is of a sandwich structure, and a heating pipe is arranged in the jacket.
Optionally, the side wall of the box body of the car body part is a double-layer metal plate, and a heat insulation layer is filled between the metal plates.
Specifically, the mucus tank is designed into a jacket structure with an inner layer and an outer layer, the middle of the jacket is filled with warm water with temperature control, which is used for controlling the viscosity of the adhesive liquid in the mucus tank, and a U-shaped indirect heating pipe can be arranged in the jacket; the effect of automobile body part is to the combined material heating and drying, adopts the metal sheet of packing aerogel insulating layer, makes the heat preservation effect of automobile body part stronger.
Optionally, the rotation of all the heating drums is consistent, and the rotation direction of all the cooling drums is inconsistent.
Specifically, when the composite material enters the vehicle body part, the heating rollers are used for changing the cloth penetrating direction, and all the heating rollers arranged along a straight line synchronously rotate in the same direction; when the composite material enters the tail part, the rotation directions of all the cooling rollers are inconsistent, so that the total length and total time of passing are increased, and the cooling effect is enhanced.
Examples
As shown in fig. 1 to 8, the present invention provides a multifunctional complex machine for complex processing of a multi-layered fabric, comprising:
the machine head part is of a double-layer composite structure, a first cloth rolling roller shaft 1, a second cloth rolling roller shaft 2, a third cloth rolling roller shaft 3 and a fourth cloth rolling roller shaft 4 are arranged on a ground layer along the axial direction of the multifunctional composite machine, a fifth cloth rolling roller shaft 5 is arranged on a second layer, a first liquid-sticking groove 6 is arranged between the first cloth rolling roller shaft 1 and the second cloth rolling roller shaft 2, a first liquid-feeding roller 7 and a second liquid-feeding roller 8 are arranged above the first liquid-sticking groove 6, a second liquid-sticking groove 9 is arranged between the second cloth rolling roller shaft 2 and the third cloth rolling roller shaft 3, a third liquid-feeding roller 10 and a fourth liquid-feeding roller 11 are arranged above the second liquid-sticking groove 9, a third liquid-sticking groove 12 is arranged on one side of the fifth cloth rolling roller shaft 5, a fifth liquid-feeding roller 13 and a sixth liquid-feeding roller 14 are arranged above the third liquid-sticking groove 12, foam rollers 15, a third foam roller 14 and a fourth foam roller 14 are respectively arranged on one side of the first liquid-feeding roller 7, the second liquid-feeding roller 8, the third liquid-feeding roller 10 and the fourth liquid-feeding roller 11, a foam roller 17 and a fourth foam roller 19 are respectively arranged on one side of the third liquid-feeding roller 14 and a movable baffle plate 20 respectively;
the mucus conveying structure is connected with all the viscous liquid tanks, all the foam baffles and all the movable foam baffles;
the car body part is of a box structure and comprises a heating box 25 and five heating rollers, namely a first heating roller 26, a second heating roller 27, a third heating roller 28, a fourth heating roller 29 and a fifth heating roller 30, wherein the discharging end of the car head part is connected with the feeding end of the car body part;
the tail part, the feed end is connected with the discharge end of automobile body part, and the tail part includes a plurality of cooling roller, and a cooling system 31 is formed to a plurality of cooling roller, and the discharge end of tail part is connected with finished product cloth roller, 36.
In this embodiment, a first two-roll mill 32 is placed in a gap reserved between two layers of cloth roller shafts, a second two-roll mill 33 and a third two-roll mill 34 are placed at the feeding end of the vehicle body part, and a fourth two-roll mill 35 is placed at the discharging end of the vehicle body part.
In this embodiment, the movable foam barriers on both sides of the fifth liquid feeding roller 13 and the sixth liquid feeding roller 14 are all arranged in an inverted eight shape.
In this embodiment, the head portion also includes a crawler conveyor 37.
In this embodiment, the mucus conveying structure includes a mucus storage tank 23 and a foam generator 24, where a first liquid outlet of the mucus storage tank 23 is connected to the first mucus tank 6, the second mucus tank 9, and the third mucus tank 12, and a second liquid outlet of the mucus storage tank 23 is connected to all foam baffles and all movable foam baffles through the foam generator 24.
In this embodiment, the first liquid feeding roller 7 and the second liquid feeding roller 8 are a rubber roller and a steel roller, respectively, and the outer surface of the steel roller is uneven. The feed rollers above each of the viscous liquid tanks may be provided in the same configuration as the first feed roller 7 and the second feed roller 8.
In this embodiment, the device further comprises an operation table part and a transmission part which are arranged oppositely.
In this embodiment, the walls of the first, second and third viscous liquid tanks 6, 9 and 12 are all sandwich structures, the walls are made of stainless steel, and heating pipes are arranged in the jacket.
In this embodiment, the side wall of the box body of the vehicle body part is a double-layer metal plate, and a heat insulating layer is filled between the metal plates.
In this embodiment, the rotation of all the heating drums is uniform, and the rotation direction of all the cooling drums is not uniform.
In conclusion, the multifunctional compound machine for compound processing of the multi-layer fabric has the total length of 21m, and the head part, the body part and the tail part are 8m,8m and 5m respectively; working width is 3.5m, and effective processing width is 2.5m; the ground layer of the head part is 2.5m, and the two layers are 2.5m; the floor slab layer by layer is the decorative pattern steel sheet, and steelframe, heating cabinet 25, the cooling tank of locomotive part are the channel-section steel, and the box of heating cabinet 25 is the heat preservation steel sheet, fills aerogel insulating layer between two-layer steel sheet. When the first adhesive liquid groove 6 adopts a full-coating process, the adhesive liquid adhered by the surface layer of the first liquid feeding roller 7 when the adhesive liquid in the first adhesive liquid groove 6 is contacted with the first liquid feeding roller 7 is adhered to the back surface of the fabric layer, and the other fabric layer entering in the same direction is compounded, and the first foam baffle 15 and the second foam baffle 16 do not work in the full-coating process; when a foam coating process is used, the mucus in the mucus tank 23 is transported directly to the upper liquid-feeding roller and the lower foam baffle or movable foam baffle by the foam generator 24, and the mucus tank is always empty in the foam coating process.
The fifth cloth roller 5 in the head part is arranged at a position which can be used for attaching a polymer material film to the outermost layer in the composite material besides the multi-layer material composite, so that the film can endow the multi-layer composite material with more performance.
The multifunctional compound machine can be changed into left-hand equipment, an operation desk part is arranged on the left side, a transmission part and auxiliary facilities are arranged on the right side, a display screen, an electric control cabinet, an emergency button switch and the like of a head part are arranged on the left side, operation buttons of the head part, a body part and a tail part are arranged on the left side of the machine, walking of personnel, inspection route passages are all arranged on the left side of the machine, and the arrangement positions of a mucus storage tank 23 and a foam generator 24 of the head part are correspondingly adjusted.
The heating box 25 of the multifunctional compound machine can be changed according to the site condition, the heating box 25 can be changed from horizontal type to vertical type, and all the heating rollers are changed from flat type to vertical type.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.

Claims (10)

1. A multifunctional compounding machine for compounding a multi-layer fabric, comprising:
the machine head part is of a multi-layer compound structure, each layer of the machine head part comprises a plurality of cloth rolling roller shafts arranged along the axial direction, a liquid sticking groove is arranged between adjacent cloth rolling roller shafts, two liquid feeding rollers are arranged above the liquid sticking groove along the vertical direction, and foam baffles are arranged on one side or two sides of each liquid feeding roller;
a mucous delivery structure connected to the mucous tank and the foam baffle;
the automobile body part is of a box structure, the inside of the automobile body part comprises a plurality of heating rollers, and the discharging end of the automobile head part is connected with the feeding end of the automobile body part;
the automobile body part comprises a tail part, wherein a feeding end is connected with a discharging end of the automobile body part, the tail part comprises a plurality of cooling rollers, and the discharging end of the tail part is connected with a finished cloth roller shaft.
2. The multifunctional composite machine for composite processing of multi-layer fabrics according to claim 1, wherein a first two-roll mill is arranged between each layer of cloth rolling shafts, and a second two-roll mill is arranged at the feeding end and the discharging end of the vehicle body part respectively.
3. The multifunctional compound machine for compound processing of multi-layer fabrics according to claim 1, wherein the foam baffle is arranged in an inverted eight shape on two sides of the liquid feeding roller.
4. The multifunctional compound machine for the compound processing of multilayer fabrics according to claim 1, wherein the headstock section further comprises a crawler conveyor.
5. The multifunctional compound machine for the compound processing of multilayer fabrics according to claim 1, wherein the mucus conveying structure comprises a mucus storage tank and a foam generator, a first liquid outlet of the mucus storage tank is connected with the mucus tank, and a second liquid outlet of the mucus storage tank is connected with the foam baffle through the foam generator.
6. The multifunctional compound machine for compound processing of multi-layer fabrics according to claim 1, wherein the two liquid feeding rollers are a rubber roller and a steel roller respectively, and the outer surface of the steel roller is uneven.
7. The multifunctional complex machine for multi-layer textile complex processing of claim 1, further comprising an oppositely disposed console section and a drive section.
8. The multifunctional compound machine for compound processing of multi-layer fabrics according to claim 1, wherein the wall of the mucus groove is of a sandwich structure, and a heating pipe is arranged in the jacket.
9. The multifunctional compound machine for multi-layer fabric compound processing according to claim 1, wherein the side wall of the box body of the vehicle body part is a double-layer metal plate, and a heat insulation layer is filled between the metal plates.
10. The multifunctional compound machine for multi-layer fabric compounding according to claim 1, wherein the rotation of all the heating drums is uniform and the rotation direction of all the cooling drums is non-uniform.
CN202311664421.XA 2023-12-06 2023-12-06 Multifunctional compounding machine for compounding and processing multi-layer fabric Pending CN117681539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311664421.XA CN117681539A (en) 2023-12-06 2023-12-06 Multifunctional compounding machine for compounding and processing multi-layer fabric

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311664421.XA CN117681539A (en) 2023-12-06 2023-12-06 Multifunctional compounding machine for compounding and processing multi-layer fabric

Publications (1)

Publication Number Publication Date
CN117681539A true CN117681539A (en) 2024-03-12

Family

ID=90134537

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311664421.XA Pending CN117681539A (en) 2023-12-06 2023-12-06 Multifunctional compounding machine for compounding and processing multi-layer fabric

Country Status (1)

Country Link
CN (1) CN117681539A (en)

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