CN115257128B - Device and method for manufacturing fiber reinforced thermoplastic resin matrix honeycomb core - Google Patents

Device and method for manufacturing fiber reinforced thermoplastic resin matrix honeycomb core Download PDF

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Publication number
CN115257128B
CN115257128B CN202210830478.1A CN202210830478A CN115257128B CN 115257128 B CN115257128 B CN 115257128B CN 202210830478 A CN202210830478 A CN 202210830478A CN 115257128 B CN115257128 B CN 115257128B
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thermoplastic resin
fiber reinforced
reinforced thermoplastic
welding mechanism
resin matrix
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CN115257128A (en
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张旭
杨宗辉
李春杰
李华冠
吴超
李晓泉
孙婉昕
万金初
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/146Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is a honeycomb structure

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention discloses a fiber reinforced thermoplastic resin matrix honeycomb core manufacturing device and a fiber reinforced thermoplastic resin matrix honeycomb core manufacturing method, wherein the fiber reinforced thermoplastic resin matrix honeycomb core manufacturing device comprises a feeding guide rail, a first welding mechanism and a second welding mechanism; the feeding guide rail is used for conveying the fiber reinforced thermoplastic resin matrix composite board; the first welding mechanism and the second welding mechanism are arranged at intervals along the feeding direction of the feeding guide rail, the first welding mechanism and the second welding mechanism respectively comprise a plurality of groups of first clamps and second clamps which can move oppositely, and the first clamps and the second clamps are distributed in a staggered manner in the feeding direction perpendicular to the feeding guide rail; the first welding mechanism and the second welding mechanism are used for alternately welding two adjacent fiber reinforced thermoplastic resin matrix composite boards respectively to obtain the fiber reinforced thermoplastic resin matrix honeycomb core with the regular hexagonal honeycomb structure. The device and the method provided by the invention can realize the automatic production of the fiber reinforced thermoplastic resin matrix honeycomb core, and have the advantages of high forming precision, simplified manufacturing procedures and high production efficiency.

Description

Device and method for manufacturing fiber reinforced thermoplastic resin matrix honeycomb core
Technical Field
The invention belongs to the technical field of honeycomb core forming, and particularly relates to a device and a method for manufacturing a fiber reinforced thermoplastic resin-based honeycomb core.
Background
The fiber reinforced thermoplastic resin matrix composite honeycomb structure has the outstanding advantages of light weight, high strength, good structural stability, impact resistance and the like, and is widely applied to important fields of aerospace, transportation and the like. Along with the increasing demands of energy conservation, emission reduction and light weight design, the fiber reinforced resin matrix composite honeycomb structure also starts to show very wide application prospects in the fields of biomedical treatment, civil engineering, mechanical equipment and the like, and the manufacturing demands of the thermoplastic resin matrix honeycomb plate are high.
At present, the thermoplastic resin matrix composite honeycomb core mainly utilizes gluing to realize the combination of resin matrix plates and then prepares the honeycomb core with a corresponding hexagonal structure through traction expansion, but the processing method has poor precision, is easy to generate irregular hexagonal honeycomb, has long gluing curing time and low processing efficiency, and has poor reliability of gluing positions, thereby influencing the forming and using effects of the honeycomb plates. How to quickly and efficiently realize the reliable manufacture of the fiber reinforced thermoplastic resin matrix composite honeycomb core is one of the key technologies to be solved in the present urgent need.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a device and a method for manufacturing a fiber reinforced thermoplastic resin-based honeycomb core, which realize automatic production, have high forming precision, simplify manufacturing procedures and improve production efficiency.
The invention provides the following technical scheme:
in a first aspect, a fiber reinforced thermoplastic resin-based honeycomb core manufacturing apparatus is provided, comprising a feed rail, a first welding mechanism, and a second welding mechanism;
the feeding guide rail is used for conveying the fiber reinforced thermoplastic resin matrix composite board;
the first welding mechanism and the second welding mechanism are arranged at intervals along the feeding direction of the feeding guide rail, the first welding mechanism and the second welding mechanism respectively comprise a plurality of groups of first clamps and second clamps which can move oppositely, and the first clamps and the second clamps are distributed in a staggered manner in the feeding direction perpendicular to the feeding guide rail;
the first welding mechanism and the second welding mechanism are used for alternately welding two adjacent fiber reinforced thermoplastic resin matrix composite boards respectively to obtain the fiber reinforced thermoplastic resin matrix honeycomb core with the regular hexagonal honeycomb structure.
Furthermore, the feeding guide rail realizes step-by-step conveying through a step motor.
Furthermore, controllable resistance heating devices are arranged in the first clamp and the second clamp, and displacement of the first clamp and the second clamp is achieved through a pneumatic piston.
In a second aspect, there is provided a method of manufacturing a fibre reinforced thermoplastic resin based honeycomb core using the apparatus of the first aspect, comprising the steps of:
when the fiber reinforced thermoplastic resin matrix composite plates are conveyed to the first welding mechanism through the feeding guide rail, the first clamps of the first welding mechanism move in a pair-by-pair mode, heat and pressurize two adjacent fiber reinforced thermoplastic resin matrix composite plates and enable the two adjacent fiber reinforced thermoplastic resin matrix composite plates to be welded together, and the first clamps are restored to the original positions after the work is finished;
the fiber reinforced thermoplastic resin matrix composite board continues to advance for one unit, meanwhile, the first welding mechanism moves backwards for one unit, the second welding mechanism advances for one unit, then the second clamps of the second welding mechanism move pairwise, the two adjacent fiber reinforced thermoplastic resin matrix composite boards are heated and pressurized and welded together, and the second clamps restore to the original position after the work is finished;
the fiber reinforced thermoplastic resin matrix composite board continues to advance for one unit, meanwhile, the second welding mechanism moves backwards for one unit, the first welding mechanism advances for one unit, then the first clamps of the first welding mechanism move pairwise, the two adjacent fiber reinforced thermoplastic resin matrix composite boards are heated and pressurized and welded together, and the first clamps are restored to the original positions after the work is finished;
and repeating the two steps to enable the second welding mechanism and the first welding mechanism to work alternately, so as to obtain the fiber reinforced thermoplastic resin matrix honeycomb core with the regular hexagonal honeycomb structure.
Further, one unit length of the advancing fiber reinforced thermoplastic resin matrix composite board is the side length of the regular hexagonal honeycomb.
Further, the fiber in the fiber reinforced thermoplastic resin matrix composite board is any one of glass fiber, carbon fiber, ceramic fiber, graphite fiber, polyester fiber, aramid fiber and natural fiber.
Further, the thermoplastic resin in the fiber reinforced thermoplastic resin matrix composite board is any one of polypropylene, polyethylene, polyvinyl chloride, polyphenyl ether, polyamide and polyoxymethylene.
Further, the thickness of the fiber reinforced thermoplastic resin matrix composite board is 0.1-3.0 mm, and the width is 1.0-10.0 cm.
Further, the heating temperature of the first clamp and the second clamp when welding the fiber reinforced thermoplastic resin matrix composite board is 100-280 ℃, the extrusion force is 0.1-5.0 MPa, and the clamping time is 1-5 s.
Further, the clamping surfaces of the first clamp and the second clamp are rectangular, the length of the rectangle is 1.0-10.0 cm, and the width of the rectangle is 0.5-5.0 cm.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the fiber reinforced thermoplastic resin matrix honeycomb core with the regular hexagonal honeycomb structure is obtained through continuous feeding of the fiber reinforced thermoplastic resin matrix composite board and alternate operation of the first welding mechanism and the second welding mechanism, so that automatic production can be realized, the forming precision is high, the manufacturing process is simplified, and the production efficiency is high;
(2) According to the invention, the first clamp and the second clamp are used for heating and pressurizing two adjacent fiber reinforced thermoplastic resin matrix composite plates, so that the interface materials are fused, the thermoplastic welding effect is achieved, and the bonding strength of the composite plates is high;
(3) The manufacturing process provided by the invention is efficient and reliable, greatly improves the manufacturing capacity and quality of the fiber reinforced thermoplastic resin matrix composite honeycomb core, is not limited by resin materials and fiber reinforcement materials, and has wider application range and adaptability.
Drawings
FIG. 1 is a schematic view of a fiber reinforced thermoplastic resin-based honeycomb core manufacturing apparatus in accordance with an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating a first welding mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view showing a state in which the first bonding mechanism and the second bonding mechanism alternately move in the embodiment of the present invention;
marked in the figure as: 1. a first welding mechanism; 2. a second welding mechanism; 3. fiber reinforced thermoplastic resin matrix composite board.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a fiber reinforced thermoplastic resin-based honeycomb core manufacturing apparatus including a feed rail, a first bonding mechanism 1, and a second bonding mechanism 2.
The feeding guide rail realizes stepping conveying through a stepping motor and is used for conveying the fiber reinforced thermoplastic resin matrix composite board 3.
The first welding mechanism 1 and the second welding mechanism 2 are arranged at intervals along the feeding direction of the feeding guide rail, and the first welding mechanism 1 and the second welding mechanism 2 respectively comprise a plurality of groups of first clamps and second clamps which can move oppositely, and the first clamps and the second clamps are distributed in a staggered manner in the feeding direction perpendicular to the feeding guide rail. Controllable resistance heating devices are arranged in the first clamp and the second clamp, and displacement of the first clamp and the second clamp is realized through a pneumatic piston; the clamping surfaces of the first clamp and the second clamp are rectangular, the length of the rectangle is 1.0-10.0 cm, and the width of the rectangle is 0.5-5.0 cm. The first welding mechanism 1 and the second welding mechanism 2 are used for alternately welding two adjacent fiber reinforced thermoplastic resin matrix composite boards 3 respectively to obtain a fiber reinforced thermoplastic resin matrix honeycomb core with a regular hexagonal honeycomb structure.
Example 2
This example provides a method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core using the apparatus of example 1, wherein the rectangular clamping surfaces of the first clamp and the second clamp have a length of 2.0cm and a width of 1.0cm. The specific manufacturing steps are as follows:
(1) As shown in FIG. 1, six carbon fiber reinforced polyethylene composite sheets with a thickness of 0.5mm and a width of 1.0cm were fed stepwise through a feed rail by a step distance of 10.0mm.
(2) As shown in fig. 2, after the carbon fiber reinforced polyethylene composite sheet is stepped to the corresponding position, each first clamp of the first welding mechanism 1 is heated to 120 ℃ and moves two by two, two plates in the middle of the two first clamps are extruded together under external load, the extrusion force is 0.2MPa, the first clamps are quickly released and restored to the initial position after the extrusion force is kept for 2s, the two plates in the middle of the first clamps are firmly welded together, and the second welding mechanism 2 is kept in an original state and does not work in the whole process.
(3) As shown in fig. 3, the carbon fiber reinforced polyethylene composite sheet was further stepped forward by 10mm while the first welding mechanism was stepped backward by 10mm and the second welding mechanism was stepped forward by 10mm.
(4) The second clamps of the second welding mechanism 2 are heated to 120 ℃ and move in a pair-by-pair mode, two plates in the middle of the second clamps are extruded together under external load, the extrusion force is 0.2MPa, the second clamps are quickly released and restored to the initial position after the extrusion force is kept for 2s, the two plates in the middle of the second clamps are firmly welded together, and in the whole process, the first welding mechanism 1 is kept in an original state and does not work.
(5) The carbon fiber reinforced polyethylene composite sheet continues to step forward by 10mm while the second welding mechanism 2 steps backward by 10mm and the first welding mechanism 1 steps forward by 10mm.
(6) And (3) repeating the steps (2) to (5), and alternately working through the first welding mechanism 1 and the second welding mechanism 2 to obtain the carbon fiber reinforced polyethylene honeycomb core with the regular hexagonal honeycomb structure, so that continuous high-efficiency automatic production and manufacturing are realized, the honeycomb structure is stable, and the service performance is reliable.
Example 3
This example provides a method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core using the apparatus of example 1, wherein the rectangular clamping surfaces of the first clamp and the second clamp have a length of 1.0cm and a width of 0.5cm. The specific manufacturing steps are as follows:
(1) As shown in FIG. 1, six glass fiber reinforced polypropylene composite sheets with a thickness of 0.1mm and a width of 1.0cm were fed stepwise through a feed rail by a step distance of 5mm.
(2) As shown in fig. 2, after the glass fiber reinforced polypropylene composite sheet is stepped to the corresponding position, each first clamp of the first welding mechanism 1 is heated to 200 ℃ and moves two by two, two plates in the middle of the two first clamps are extruded together under external load, the extrusion force is 0.1MPa, the first clamp is quickly released and restored to the initial position after the extrusion force is maintained for 1s, the two plates in the middle of the first clamp are firmly welded together, and the second welding mechanism 2 is maintained in an original state and does not work in the whole process.
(3) As shown in fig. 3, the glass fiber reinforced polypropylene composite sheet continues to step forward by 5mm while the first welding mechanism 1 steps backward by 5mm and the second welding mechanism 2 steps forward by 5mm.
(4) The second clamps of the second welding mechanism 2 are heated to 200 ℃ and move in a pair-by-pair mode, two plates in the middle of the second clamps are extruded together under external load, the extrusion force is 0.1MPa, the second clamps are quickly loosened to restore to the initial position after the extrusion force is kept for 1s, the two plates in the middle of the second clamps are firmly welded together, and in the whole process, the first welding mechanism 1 is kept in an original state and does not work.
(5) The glass fiber reinforced polypropylene composite sheet continues to step forward by 5mm while the second welding mechanism 2 steps backward by 5mm and the first welding mechanism 1 steps forward by 5mm.
(6) Repeating the steps (2) to (5), and alternately working through the first welding mechanism 1 and the second welding mechanism 2 to obtain the glass fiber reinforced polypropylene honeycomb core with the regular hexagonal honeycomb structure, so that continuous high-efficiency automatic production and manufacturing are realized, the honeycomb structure is stable, and the service performance is reliable.
Example 4
This example provides a method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core using the apparatus of example 1, wherein the rectangular clamping surfaces of the first clamp and the second clamp have a length of 10cm and a width of 5cm. The specific manufacturing steps are as follows:
(1) As shown in FIG. 1, six graphite fiber reinforced polyamide composite sheets having a thickness of 3.0mm and a width of 10cm were fed stepwise through a feed rail by a step distance of 5cm.
(2) As shown in fig. 2, after the graphite fiber reinforced polyamide composite sheet is stepped to the corresponding position, each first clamp of the first welding mechanism 1 is heated to 280 ℃ and moves two by two, two plates in the middle of the two first clamps are extruded together under external load, the extrusion force is 5MPa, the first clamp is quickly released and returns to the initial position after the extrusion force is kept for 5 seconds, the two plates in the middle of the first clamp are firmly welded together, and in the whole process, the second welding mechanism 2 is kept in an original state and does not work.
(3) As shown in fig. 3, the graphite fiber reinforced polyamide composite sheet continues to step forward for 5cm while the first welding mechanism 1 steps backward for 5cm and the second welding mechanism 2 steps forward for 5cm.
(4) The second clamps of the second welding mechanism 2 are heated to 280 ℃ and move in a pair-by-pair mode, two plates in the middle of the second clamps are extruded together under external load, the extrusion force is 5MPa, the second clamps are quickly loosened to restore to the initial position after the extrusion force is 5s, the two plates in the middle of the second clamp body are firmly welded together, and in the whole process, the first welding mechanism 1 is kept in an original state and does not work.
(5) The graphite fiber reinforced polyamide composite sheet continues to step forward for 5cm while the second welding mechanism 2 steps backward for 5cm, while the first welding mechanism 1 steps forward for 5cm.
(6) And (3) repeating the steps (2) to (5), and alternately working through the first welding mechanism 1 and the second welding mechanism 2 to obtain the graphite fiber reinforced polyamide honeycomb core with the regular hexagonal honeycomb structure, so that continuous high-efficiency automatic production and manufacturing are realized, the honeycomb structure is stable, and the service performance is reliable.
Comparative examples 1 to 3
Honeycomb cores of the same specifications as in examples 2 to 4 were prepared as comparative examples 1 to 3 using the existing cementing process.
Examples 2-4 and comparative examples 1-3 were compared in terms of molding cycle and honeycomb core wall bond strength, and the corresponding molding properties are shown in Table 1 below.
Table 1 honeycomb core forming properties
As can be seen from Table 1, the manufacturing process of the embodiments 2-4 of the invention is more efficient, and greatly improves the manufacturing capacity and production efficiency of the fiber reinforced thermoplastic resin matrix composite honeycomb core; in addition, the honeycomb cores manufactured in the embodiments 2-4 have high bonding strength, better quality, high forming precision and high qualification rate, and are beneficial to reducing the production cost.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.

Claims (7)

1. The fiber reinforced thermoplastic resin-based honeycomb core manufacturing device is characterized by comprising a feeding guide rail, a first welding mechanism and a second welding mechanism;
the feeding guide rail is used for conveying the fiber reinforced thermoplastic resin matrix composite board;
the first welding mechanism and the second welding mechanism are arranged at intervals along the feeding direction of the feeding guide rail, the first welding mechanism and the second welding mechanism respectively comprise a plurality of groups of first clamps and second clamps which can move oppositely, and the first clamps and the second clamps are distributed in a staggered manner in the feeding direction perpendicular to the feeding guide rail;
the first welding mechanism and the second welding mechanism are used for alternately welding two adjacent fiber reinforced thermoplastic resin matrix composite plates respectively to obtain a fiber reinforced thermoplastic resin matrix honeycomb core with a regular hexagonal honeycomb structure;
the feeding guide rail realizes stepping conveying through a stepping motor.
2. The fiber reinforced thermoplastic resin based honeycomb core manufacturing apparatus of claim 1, wherein controllable resistive heating means are provided in the first and second clamps, the first and second clamps being displaced by pneumatic pistons.
3. A method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core using the apparatus of any one of claims 1-2, comprising the steps of:
when the fiber reinforced thermoplastic resin matrix composite plates are conveyed to the first welding mechanism through the feeding guide rail, the first clamps of the first welding mechanism move in a pair-by-pair mode, heat and pressurize two adjacent fiber reinforced thermoplastic resin matrix composite plates and enable the two adjacent fiber reinforced thermoplastic resin matrix composite plates to be welded together, and the first clamps are restored to the original positions after the work is finished;
the fiber reinforced thermoplastic resin matrix composite board continues to advance for one unit, meanwhile, the first welding mechanism moves backwards for one unit, the second welding mechanism advances for one unit, then the second clamps of the second welding mechanism move pairwise, the two adjacent fiber reinforced thermoplastic resin matrix composite boards are heated and pressurized and welded together, and the second clamps restore to the original position after the work is finished;
the fiber reinforced thermoplastic resin matrix composite board continues to advance for one unit, meanwhile, the second welding mechanism moves backwards for one unit, the first welding mechanism advances for one unit, then the first clamps of the first welding mechanism move pairwise, the two adjacent fiber reinforced thermoplastic resin matrix composite boards are heated and pressurized and welded together, and the first clamps are restored to the original positions after the work is finished;
repeating the two steps to enable the second welding mechanism and the first welding mechanism to work alternately, so as to obtain the fiber reinforced thermoplastic resin matrix honeycomb core with the regular hexagonal honeycomb structure;
the thickness of the fiber reinforced thermoplastic resin matrix composite board is 0.1-3.0 mm, and the width is 1.0-10.0 cm;
the heating temperature of the first clamp and the second clamp when welding the fiber reinforced thermoplastic resin matrix composite board is 100-280 ℃, the extrusion force is 0.1-5.0 MPa, and the clamping time is 1.0-5.0 s.
4. A method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core as set forth in claim 3, wherein one unit length of the fiber reinforced thermoplastic resin based composite sheet advancing is the side length of a regular hexagonal honeycomb.
5. The method of manufacturing a fiber reinforced thermoplastic resin-based honeycomb core according to claim 3, wherein the fiber in the fiber reinforced thermoplastic resin-based composite sheet material is any one of glass fiber, carbon fiber, ceramic fiber, graphite fiber, polyester fiber, aramid fiber, and natural fiber.
6. The method for manufacturing a fiber reinforced thermoplastic resin based honeycomb core according to claim 3, wherein the thermoplastic resin in the fiber reinforced thermoplastic resin based composite sheet material is any one of polypropylene, polyethylene, polyvinyl chloride, polyphenylene oxide, polyamide, and polyoxymethylene.
7. A method of manufacturing a fiber reinforced thermoplastic resin based honeycomb core according to claim 3, wherein the clamping surfaces of the first and second clamps are rectangular in shape, the rectangular length is 1.0 to 10.0cm, and the rectangular width is 0.5 to 5.0cm.
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JPH09290470A (en) * 1996-04-24 1997-11-11 Showa Aircraft Ind Co Ltd Honeycomb core and its manufacture
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CN109591386A (en) * 2019-01-18 2019-04-09 中南林业科技大学 A kind of staggered honeycomb core plate of reinforcing rib and its manufacturing method
CN111231428A (en) * 2019-12-13 2020-06-05 中航复合材料有限责任公司 Preparation method of high-density energy-absorbing aluminum honeycomb core material

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