CN110171146A - The production method and production equipment of thermoplasticity core material - Google Patents

Abstract

The invention discloses a production method and production equipment of a thermoplastic core material. The production method comprises: continuously outputting a flat sheet (10) along the output direction (X) of an assembly line; A plurality of sheet unit belts (20); each sheet unit belt is guided and turned over and arranged to be arranged at intervals along the broadside output direction; each sheet unit belt is processed into a corresponding sheet unit (30), at least partially The non-closed geometry body (104) that is presented repeatedly along the output direction of the assembly line is correspondingly processed on the sheet unit belt; the sheet units are gathered and stacked and spliced into a unit assembly (100) along the broadside output direction. The production equipment includes thermoplastic material molding equipment (1), a cutting assembly (4), a guiding and positioning assembly (5), a geometric body molding assembly (2), and the like. The invention can produce the thermoplastic core material suitable for the application fields with strict structural strength requirements and diversified functional requirements at low cost and in large quantities.

Description

Production method and production equipment of thermoplastic core material

technical field

The invention relates to the technical field of material forming, in particular to a thermoplastic material and its production method and production equipment.

Background technique

The thermoplastic sandwich composite material formed by the thermoplastic core material is light in weight and high in strength, and has the advantages of excellent specific strength, designability, and recyclability. widely used.

However, there are few types of thermoplastic core materials on the market, and there are roughly two types, one is a round tube honeycomb core structure, and the other is a semi-closed folded honeycomb structure. The former extrudes a single round tube with a thicker wall thickness, blows it to form a thin tube with a smaller wall thickness, stacks multiple thin tubes into a lump, puts them into an oven, and heats and bonds them to form a honeycomb structure. The latter forms a semi-honeycomb structure by plastically deforming the continuously output flat sheet through processes such as blistering, which can then be folded into a honeycomb structure along a set direction. The former has a simple process, but the production is discontinuous, and the production efficiency is low and the cost is high. Although the latter has continuous process production, there is more material waste.

What is especially important is that there is a blow molding or blister process in the production process of the two, resulting in a thin wall thickness of the part, which cannot be filled with structural fillers or functional fillers, or the filler wall is prone to breakage in the subsequent process after filling the filler. As a result, existing thermoplastic core materials have bottlenecks in enhancing structural strength and diversifying functional requirements. Existing production methods are difficult to mass-produce thermoplastic core materials that meet the needs of light weight, heavy load, and multi-function, while taking into account processing technology, processing efficiency, and processing costs, so as to meet the increasingly stringent requirements of demand and structural strength. various fields of application.

Contents of the invention

The purpose of the present invention is to provide a novel production method and production equipment for thermoplastic core materials, which can produce thermoplastic core materials suitable for applications with strict structural strength requirements at low cost and in large quantities.

In order to achieve the above object, according to one aspect of the present invention, a kind of production method of thermoplastic core material is provided, comprising:

Continuously output flat sheets along the output direction of the assembly line;

cutting the sheet along the output direction of the assembly line and dividing it into a plurality of sheet unit belts of equal width along the output direction of the broad side of the sheet;

Each of the sheet unit belts is guided to be reversed and arranged to be arranged at intervals along the broadside output direction;

Processing each of the sheet unit belts into corresponding sheet units, wherein at least part of the sheet surfaces of the sheet unit belts are correspondingly processed with non-closed geometric shapes repeated along the output direction of the assembly line ;

The sheet units are gathered along the broadside output direction and stacked and spliced to form a unit assembly.

In some embodiments, turning each of the sheet unit belts upside down and arranging them in order along the broadside output direction includes:

The sheet unit belt after being guided and reversed extends along the output direction of the assembly line, and the sheet surface of the sheet unit belt forms a plane angle with the sheet surface of the sheet.

Optionally, the plane angle between the sheet surface of the sheet unit belt and the sheet surface of the sheet is 20°-160°.

In a specific embodiment, the sheet unit belt after being guided and reversed is perpendicular to the sheet, and each of the sheet unit belts is formed into a grid of opposing boards along the broadside output direction. grid-like distribution.

In one embodiment, processing each of said sheet unit strips into corresponding sheet units comprises:

The sheet unit belt is kept perpendicular to the sheet, and the surface of the sheet unit belt is processed with a raised geometric bulge along the broadside output direction, and the geometric bulge is formed on the surface of the sheet unit belt. A geometric inner hole is formed in the section along the vertical direction of the sheet material surface of the sheet material and penetrates axially and is non-closed on the sheet material surface of the sheet material unit belt, so as to process the geometric shape body.

Optionally, the output processing method of the sheet is extrusion, calendering, casting or rolling processing, and/or, the processing method of the geometric body is roller die extrusion, plate die extrusion or Chain die extrusion.

In some embodiments, gathering and stacking the sheet units into a unit assembly along the broadside output direction includes:

Gathering each of the sheet material units along the broadside output direction;

The contact portions between any adjacent sheet units are melt-bonded to form the unit assembly by lamination and splicing.

Optionally, the fusion bonding method between the sheet units is hot-melt splicing, ultrasonic splicing or infrared splicing.

Optionally, in some embodiments, gathering and stacking and splicing the sheet units into a unit assembly along the broadside output direction includes:

applying a bonding layer on the contact portion of the sheet unit;

Gathering each of the sheet material units along the output direction of the broadside and gluing each other to form the unit assembly.

In one embodiment, gathering, stacking and splicing the sheet units into a unit assembly along the broadside output direction includes:

Moving and adjusting the sheet unit along the output direction of the assembly line, so that the unit assembly formed by stacking and splicing includes a plurality of shaft hole structures formed by splicing the geometric bodies and arranged in sequence along the output direction of the assembly line , the shaft hole structure includes an axial through hole and a circumferentially closed shaft hole peripheral wall surrounding the axial through hole.

Further, when the flat sheet is continuously output along the output direction of the assembly line, the thickness of the continuously extruded sheet is not less than 0.1 mm.

Further, the unit assembly includes a plurality of shaft hole structures formed by splicing the geometric bodies, and the shaft hole structure includes an axial through hole and a circumferentially closed shaft hole surrounding the axial through hole For the surrounding wall, the diameter of the circumscribed circle of the axial through hole of any shape is not less than 1 mm.

Further, the unit assembly includes a plurality of shaft hole structures formed by splicing the geometric bodies, and the shaft hole structure includes an axial through hole and a circumferentially closed shaft hole surrounding the axial through hole In the peripheral wall, the ratio of the axial length of the axial through hole of any shape to the diameter of the circumscribed circle of the axial through hole is not greater than 200.

Further, the production method also includes:

Such that when the vertical direction of the sheet surface of the sheet is the direction to bear the compressive load, the material volume utilization rate of the unit assembly is not lower than 60%, preferably, the material volume utilization rate is not lower than 80%;

And/or, so that on the core cross-section of the unit assembly parallel to the sheet surface of the sheet, the planar void ratio is not lower than 40%, and further, the planar void ratio is not lower than 60%. %.

According to another aspect of the present invention, a production facility for thermoplastic core material is provided, comprising:

Thermoplastic material molding equipment, used to continuously output flat sheets along the output direction of the assembly line;

a cutting component, which cuts the sheet along the output direction of the assembly line and divides it into a plurality of sheet unit belts of equal width along the output direction of the broad side of the sheet;

a guiding and positioning component, used to guide and reverse each of the sheet unit belts and arrange them to be sequentially arranged at intervals along the output direction of the broadside;

The geometrical body forming component is used to form, on at least part of the sheet unit belt, non-closed geometrical bodies that are repeatedly presented along the output direction of the assembly line, so as to form corresponding sheet units.

Optionally, the production equipment may include:

The fusion bonding assembly is used for heating the sheet units arranged at intervals along the broadside output direction so as to be capable of fusion bonding into a unit assembly.

Further, the production equipment may include:

The gathering component is used for gathering each of the sheet units along the outputting direction of the broadside.

In one embodiment, the thermoplastic material forming equipment, the cutting assembly, the guiding and positioning assembly, the geometric shape forming assembly and the heating assembly are arranged in sequence along the output direction of the assembly line.

Optionally, the guiding and positioning component is a guiding roller or a guiding box, and/or, the fusion bonding component is a baking component, an ultrasonic welding component or an infrared welding component.

Optionally, the production equipment may include:

a glue gun for applying a bonding layer on the contact portion of the sheet unit; and

The gathering component is used for gathering each of the sheet material units coated with the adhesive layer along the output direction of the broadside so as to glue each other to form a unit assembly.

In one embodiment, the thermoplastic material molding equipment, the cutting assembly, the guiding and positioning assembly, the geometric body forming assembly, the glue gun and the gathering assembly are along the output direction of the assembly line Arranged sequentially.

In one embodiment, the geometric body forming assembly is a pressing roller assembly arranged between adjacent sheet material unit belts, the guiding and positioning assembly is a guiding roller assembly, and the rotation of the pressing roller assembly The axis is perpendicular to the sheet surface of the sheet and the peripheral wall of the roller body is formed with convex-shaped edge crimping portions spaced apart in the circumferential direction.

In the production method of the thermoplastic core material of the present invention, the plastic material can be continuously output through, for example, thermoplastic material molding equipment, etc., the production continuity is good, the assembly line operation is possible, and the honeycomb body is produced in an integrated manner, the production efficiency is high, and large-scale Production application, reduce production cost, and the production process only has processing methods such as separation and rolling, and there is no material waste; in addition, through the extrusion method of thermoplastic material forming equipment, there is no process such as blister or blow molding in the intermediate processing process, so that it can be obtained The ideal large wall thickness can realize the filling of various reinforcing materials and functional materials, and prevent the filler from breaking the wall, so it can be applied to various application fields that have strict requirements on the structural strength of thermoplastic core materials. The production equipment of the thermoplastic core material of the present invention is composed of a plurality of relatively common devices, the cost is low, and the production is continuous. Different from the existing circular tube honeycomb and semi-hexagonal folded honeycomb, etc., it is convenient to realize the continuous operation of the assembly line to efficiently process and produce the thermoplastic core material in the shape of honeycomb body, thereby greatly reducing the production cost, easy to popularize and large-scale production, application.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Figure 1a shows the three-dimensional structure of the thermoplastic core material according to the first embodiment of the present invention, wherein the axial through holes are regular hexagonal honeycomb holes;

Figure 1b is a perspective view of a complete single sheet unit in the unit assembly of Figure 1a, which is composed of two adjacent sheet units spliced together;

Fig. 1c is the front view of Fig. 1a;

Figure 1d is a top view of Figure 1c;

Figure 1e is a perspective view of a sheet unit constituting the smallest unit of the unit assembly in Figure 1a;

Figure 2a and Figure 2b respectively show the structure of the thermoplastic core material according to the second embodiment of the present invention, wherein the axial through hole is a short waist-shaped hole, and the butt contact surfaces form a planar contact;

Figure 3a and Figure 3b respectively show the structure of the thermoplastic core material according to the third embodiment of the present invention, wherein the axial through hole is a short waist-shaped hole, and the butt contact surfaces form arc surface contact;

Figure 4a and Figure 4b respectively show the structure of the thermoplastic core material according to the fourth embodiment of the present invention, wherein the axial through hole is a relatively long waist-shaped hole, and the butt contact surfaces form a planar contact;

Fig. 5a and Fig. 5b respectively show the structure of the thermoplastic core material according to the fifth embodiment of the present invention, wherein the axial through hole is a relatively long waist-shaped hole, and the butt contact surfaces form an arc surface contact;

Fig. 6a and Fig. 6b respectively show the structure of the thermoplastic core material according to the sixth embodiment of the present invention, wherein the axial through holes are diamond-shaped holes, and the abutting contact surfaces form planar contact;

Fig. 7a and Fig. 7b respectively show the structure of the thermoplastic core material according to the seventh embodiment of the present invention, wherein the axial through holes are diamond-shaped holes, and the abutting contact surfaces form pointed contacts;

Figure 8a and Figure 8b show the structure of the thermoplastic core material according to the eighth embodiment of the present invention from the perspectives of perspective view and front view respectively, wherein the axial through-holes have various shapes, and the structural shapes of adjacent sheet material units different;

9 is a front view of a thermoplastic core material according to a ninth embodiment of the present invention;

Figure 10 shows a schematic diagram of the layered structure of the sheet unit;

The shaded parts in Figures 11a to 11a' respectively illustrate the total cross-sectional area of the load-bearing wall and the cross-sectional area of the effective part when the structure of the thermoplastic core material is fully penetrated and the bearing force direction is the vertical direction in the figure;

The shaded parts in Figures 11b to 11b' respectively illustrate the total cross-sectional area of the load-bearing wall and the cross-sectional area of the effective part when the structure of the thermoplastic core material has a defect at one end and the bearing force direction is the vertical direction in the figure;

The shaded parts in Figures 11c to 11c' respectively illustrate the total cross-sectional area of the load-bearing wall and the cross-sectional area of the effective part when the structure of the thermoplastic core material has defects at both ends and the bearing force direction is the vertical direction in the figure;

The shaded parts in Figures 11d to 11d' respectively illustrate the total cross-sectional area of the load-bearing wall and the cross-sectional area of the effective part when the structure of the thermoplastic core material is an intermediate defect and the bearing force direction is the vertical direction in the figure;

The shaded parts in Figures 11e to 11e' respectively illustrate the total cross-sectional area of the load-bearing wall and the cross-sectional area of the effective part when the structure of the thermoplastic core material is a combined defect and the bearing force direction is the vertical direction in the figure;

12 is a schematic flow diagram of a first production method of a plastic core material according to an embodiment of the present invention;

Fig. 13 is a schematic structural view of the production equipment used in the production method shown in Fig. 12;

14 is a schematic flow diagram of a second production method of a thermoplastic core material according to another embodiment of the present invention; and

Figures 15a to 15d are structural schematic diagrams of production equipment used in the second production method shown in Figure 14, wherein Figures 15a and 15b are perspective views, Figure 15c is a front view, and Figure 15d is a top view.

Explanation of reference signs

100 Unit assembly 101 Axial through hole

102 Highs 103 Lows

104 Geometry body 105 Geometry bore

106 Geometrically spaced holes

1 Thermoplastic forming equipment 2 Geometry forming components

3 Applicator 4 Cutting assembly

5 Guiding and positioning components 6 Stacking and splicing components

5a Forward diverter 5b Reverse diverter

7 Gathering Components 8 Fusion Bonding Components

10 Sheets 10’ Profiles

11 Peak band 12 Valley band

20-sheet unit with 30-sheet unit

31 Flat sheet unit 32 Geometric sheet unit

D1 first direction D2 second direction

D3 The third direction Z Vertical direction of assembly line platform

X Pipeline output direction Y Broadside output direction

a Included angle a’ Plane included angle

W in width direction L in length direction

OO' Geometric Bore Centerline PP' Rotation Axis

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

The thermoplastic core material according to the present invention, its production method and production equipment are described below with reference to the accompanying drawings.

Referring to Fig. 1a to Fig. 1e, the structure of the thermoplastic core material according to the first embodiment of the present invention is illustrated in different angles and ways.

In the first embodiment, the thermoplastic core material is shown in the shape of a honeycomb body, ie, the cell assembly 100 shown in FIG. 1a. In terms of composition, the unit assembly 100 is composed of a plurality of sheet units 30 extending along the first direction D1 and stacked and spliced along the second direction D2. Wherein, at least part of the sheet surface of the sheet unit 30 is formed with non-closed geometric bodies 104 sequentially distributed along the first direction D1. In terms of external shape, as shown in Fig. 1a and Fig. 1c, the unit assembly 100 formed by splicing sheet material units 30 includes a plurality of shaft hole structures formed by splicing geometric bodies 104 and distributed along the first direction D1, the shaft holes The structure includes an axial through hole 101 axially along the third direction D3 and a circumferentially closed axial hole peripheral wall surrounding the axial through hole 101 .

In the thermoplastic core material of the present invention, the sheet unit 30 can be divided into two types: a flat sheet unit 31 and a geometric sheet unit 32 with geometric shapes 104 formed on the surface of the sheet. The sheet surface of the flat sheet unit 31 is not machined with geometric shapes 104 , so that the surface of the sheet is flat, and the surface of the sheet of geometric sheet unit 32 is processed with geometric shapes 104 . In each of the illustrated embodiments, the shapes and structures of the multiple geometric bodies 104 on the same geometric sheet unit 32 are the same, that is, the geometric bodies 104 appear repeatedly along the first direction D1, but the present invention is not limited thereto , the shapes and structures of the plurality of geometric bodies 104 on each geometric sheet unit 32 may also be different. Moreover, the geometric shapes 104 on each geometric sheet unit 32 constituting the unit assembly 100 may be the same or different. In the first embodiment to the seventh embodiment shown in the drawings, each sheet unit 30 constituting the unit assembly 100 is a geometric sheet unit and the structural shape of the geometric body 104 on each geometric sheet unit 32 are the same. Each sheet unit 30 in the eighth embodiment is a geometric sheet unit, but includes two different types of geometric sheet units alternately stacked along the D2 direction, that is, the unit assembly 100 includes at least Two geometric sheet units 32 . In the ninth embodiment of FIG. 9 , it is formed by alternately stacking flat sheet units 31 and geometric sheet units 32 along the direction D2.

In terms of shape, at least a plurality of shaft hole structures distributed along the first direction D1 are formed in the unit assembly 100, and the plurality of shaft hole structures can be distributed in one or more rows, and each shaft hole structure includes axial holes along the first direction D1. The axial through hole 101 in the three directions D3 and the peripheral wall of the axial hole that surrounds the axial through hole 101 is closed in the circumferential direction. Wherein, each shaft hole structure may be composed of at least one geometric body 104 and a corresponding inner hole circumferential closure structure that closes the non-closed opening of the at least one geometric body 104 . The inner hole circumferential closed structure of the non-closed opening of the closed geometric body 104 can be a flat sheet in the adjacent sheet unit 30, or can be a part of the geometric body 104 in the adjacent sheet unit 30. non-flat sheet within.

Regarding the non-closed geometric shape body 104, it is defined as a geometric protrusion formed on the sheet surface of the sheet unit 30 along the second direction D2. The surface of the sheet has an unclosed geometric inner hole 105 . The geometric body 104 may be a press-formed structure formed on the surface of the sheet, and at this time the geometric inner hole 105 is a press-formed hole, and the geometric inner hole 105 is formed in an open state on the surface of the sheet.

Depending on the processing method and processing direction (one-way or two-way), the geometric body 104 can be formed on the same sheet surface, or on two opposite sheet surfaces of the sheet, that is, from the top surface of the sheet respectively and the bottom surface of the sheet protrude toward the opposite direction along the second direction D2. When the geometric body 104 is simultaneously formed on the top surface of the sheet and the bottom surface of the sheet, part of the geometric body 104 protrudes from the top surface of the sheet towards the bottom surface of the sheet, and the other part of the geometric body 104 protrudes from the bottom surface of the sheet towards the sheet. The top surface of the material is raised.

In the following descriptions in conjunction with the accompanying drawings, in order to facilitate understanding and avoid confusion, all take one-way processing as an example, that is, the geometric bodies 104 are all formed on the surface of the same sheet, or uniformly protrude from the top surface of the sheet toward the bottom surface of the sheet, Either uniformly protrude from the bottom surface of the sheet towards the top surface of the sheet. Therefore, the geometrical bodies 104 marked in Fig. 1d and Fig. 1e are all convex toward the single direction of the second direction D2, that is, they all protrude from the top surface of the sheet towards the bottom surface of the sheet, so that the geometrical bodies 104 are all formed with A low of 103. However, those skilled in the art can understand that if two-way processing is used, the part between the two adjacent geometric bodies 104 marked in Figure 1d and Figure 1e and formed with the high point 102 is also a geometric body, but Contrary to the machining direction (or convex direction) of the geometric body formed with the low point 103, the geometrically spaced hole 106 is also a geometric inner hole at this time.

However, whether the geometric body 104 is defined as a one-way protrusion or a two-way protrusion, as shown in FIG. The high points 102 and the low points 103 are alternately distributed, and the high points 102 and the low points 103 may be planes or lines, so as to form plane contact or linear contact with the adjacent sheet unit 30 .

Hereinafter, for ease of understanding, the sheet unit 30 is regarded as forming each geometric body 104 by adopting unidirectional processing on a flat sheet, taking Fig. 1d and Fig. 1e as examples, the geometric bodies 104 are arranged at intervals along the first direction D1 The fabrics are all geometric protrusions protruding downward from the top surface of the sheet material unit 30, that is, semi-hexahedral protrusions, so that the geometric inner hole 105 forms an open shape on the top side facing the top surface of the sheet material. The geometric bore centerline OO' is along the third direction D3. At this time, unclosed geometric interval holes 106 may also be formed between adjacent geometric shape bodies 104 , and the unclosed openings of the geometric inner holes 105 and the geometric interval holes 106 face opposite directions. In the nine embodiments shown in the accompanying drawings, the geometric bodies 104 are uniformly protruded downward from the top surface of the sheet unit 30 , as shown in FIG. 1 e . Therefore, the plane of the high point 102 is the top surface of the sheet, and the low point 103 is the convex point of the geometric body 104 .

When a plurality of sheet units 30 are stacked and arranged in the second direction D2, if the convex direction of the geometric body 104 is taken as the forward direction, the sheet units 30 can be placed forward or reversely, as long as they can be spliced into The unit assembly 100 with axial hole structures distributed sequentially along the first direction D1 is sufficient.

When splicing into the unit assembly 100, referring to Fig. 1b, Fig. 8b and Fig. 9, in any adjacent first sheet unit and second sheet unit, at least one of the first sheet unit and the second sheet unit One is a geometric sheet unit, and in the axial hole structure formed by splicing the geometric sheet units, each axial through hole 101 includes a first geometric inner hole of at least one first geometric body on the first sheet unit, Each shaft hole structure includes at least one first geometric body on the first sheet unit and an inner hole circumferentially enclosing the first geometric inner hole of the first geometric body on the second sheet unit. Closed structure, inner bore The circumferential closed structure is a flat wall or comprises at least part of a second geometric body.

As a specific example, in the first embodiment to the seventh embodiment, the geometric bodies 104 on the sheet unit 30 are uniformly protruded from the top surface of the sheet unit 30 downwards, and all the geometric bodies 104 are The structure shapes are the same. As shown in Figure 1c, when arranged along the second direction D2, the geometric shapes 104 of each sheet unit 30 are arranged along the same orientation (downward in the figure) of the second direction D2, and any adjacent first sheet unit The alignment with the second sheet unit is such that the first geometric body on the first sheet unit and the second geometric body on the second sheet unit are staggered along the second direction D2, ie a non-aligned state. At the same time, the first geometric body and the second geometric body are alternately arranged in sequence along the first direction D1. In this way, as shown in FIG. 1 b and FIG. 1 c , the axial through hole 101 is composed of a geometric inner hole 105 and geometric interval holes 106 aligned along the second direction D2 . At this time, the inner circumferential closed structure of the geometric body 104 includes the flat wall of the sheet on the adjacent sheet unit 30 and the geometric body 104 on both sides thereof. Of course, when the geometric shapes 104 of the sheet unit 30 have the same shape and structure and are arranged at equal intervals, a suitable unit assembly 100 can also be formed by properly moving and adjusting the alignment position along the first direction D1.

In FIG. 8 b , it is obvious that part of the axial through hole 101 includes one geometric inner hole 105 , and part of the axial through hole 101 includes two geometric inner holes 105 . In FIG. 9 , each axial through hole 101 includes a geometric inner hole 105 , and the circumferential closing structure of the inner hole is a flat sheet unit 31 .

In addition, it should be noted that the axial through-holes 101 sequentially distributed along the first direction D1 in the unit assembly 100 of the present invention are not limited to the first type of axial through-holes 101 including geometric inner holes 105, and there may also be axial through-holes 101 that do not include geometrical inner holes 105. The inner hole 105, and the second type of axial through hole 101 that only includes geometrically spaced holes 106, as shown in FIG. 9 . However, the unit assembly 100 includes at least one or more rows of multiple first-type axial through holes 101 composed of geometric inner holes 105 .

In the first embodiment, the unit assembly 100 is in the shape of a cuboid, the first direction D1 and the second direction D2 are perpendicular to the two sides of the unit assembly 100, and the second direction D2 is perpendicular to the sheet unit 30. On the surface of the sheet, the axial through hole 101 penetrates along the thickness direction of the unit assembly 100 , that is, the centerline OO′ of the geometric inner hole is along the thickness direction of the unit assembly 100 . The first direction D1 shown in Fig. 1 a is the length direction of the unit assembly 100, the second direction D2 is the width direction of the unit assembly 100, and the third direction D3 is the thickness direction of the unit assembly 100, but the positioning of each direction can be mutually Instead, the present invention is not limited thereto. Moreover, the first direction D1, the second direction D2 and the third direction D3 are not limited to forming a right angle between each other, for example, the third direction D3 may form an acute angle with the first direction D1 or the second direction D2, That is, the geometric inner hole 105 is an oblique hole in the cross-section of the core material defined relative to the first direction D1 and the second direction D2 , rather than a vertical hole.

Wherein, the smallest unit constituting the unit assembly 100 , that is, the sheet unit 30 , is half of a complete honeycomb unit body constituting the unit assembly 100 as shown in FIG. 1 b . In the first embodiment, each sheet unit 30 has the same structural shape, including high points 102 and low points 103 alternately distributed in sequence in the first direction D1 as shown in FIG. 1 a . Therefore, when splicing each other along the second direction D2, the high point 102 of one sheet unit 30 should abut against the low point 103 of another sheet unit 30 adjacent to one side, so as to form the entire unit assembly 100 .

Wherein, in order to form a complete unit assembly 100, the joining methods between the sheet material units 30 as the smallest constituent units can be diversified, for example, the contact portion between the butted high point 102 and the low point 103 can be made by colloidal glue. It can be completed by bonding to form an indirect connection, or it can be completed by bonding at high temperature to form a direct connection, so an adhesive layer or a melted adhesive layer can be formed between the two. The production method and production equipment will also be described in detail below. Of course, the present invention is not limited thereto, and any other feasible bonding methods may also be used.

The second to seventh embodiments shown in the drawings are all the same as the first embodiment, that is, the shape and structure of each sheet unit 30 are the same, forming the same type combination splicing.

In the second embodiment, the axial through hole 101 of the unit assembly 100 is a relatively short waist-shaped hole, or called an elliptical hole, a racetrack hole, etc., hereinafter collectively referred to as a waist-shaped hole. In the third embodiment, the axial through hole 101 of the unit assembly 100 is also a relatively short waist-shaped hole. The difference is that in the second embodiment, the butted high point 102 and the low point 103 form a planar contact along the first direction D1, and in the third embodiment, between the butted high point 102 and the low point 103 An arc surface contact is formed, that is, the area of the bonding surface of the contact portion in the third embodiment is smaller than the area of the bonding surface of the contact portion in the second embodiment.

The axial through hole 101 of the unit assembly 100 in the fourth embodiment is a waist-shaped hole that is longer than the axial through hole 101 in the second and third embodiments. In the fifth embodiment, the axial through hole 101 of the unit assembly 100 is also a relatively long waist-shaped hole. The difference is that, in the fourth embodiment, a planar contact along the first direction D1 is formed between the butted high point 102 and the low point 103; in the fifth embodiment, the butted high point 102 and the low point 103 Form arc surface contact between them, that is, the area of the joint surface of the contact part in the fifth embodiment is smaller than the area of the joint surface of the contact part in the fourth embodiment.

Similarly, Figures 6a to 6d respectively show the structure of the thermoplastic core material according to the sixth embodiment of the present invention, wherein the axial through hole 101 is a four-sided diamond-shaped hole, and the butt joint high point 102 and low point 103 7a to 7d respectively show the structure of the thermoplastic core material according to the seventh embodiment of the present invention, wherein the axial through holes 101 are also diamond-shaped holes with four sides, and Point contact is formed between the high point 102 and the low point 103 of the abutment.

In summary, when the shape and structure of each sheet unit 30 are the same, it is only necessary to surround each sheet unit 30 on the basis of a plurality of sheet units 30 aligned at both ends along the first direction D1. The axis of rotation (for example, the long side of the sheet unit 30) in a direction D1 is turned over, wherein the turning directions of any two adjacent sheet units 30 are opposite, so that the geometric shape body 104 on one sheet unit 30 is opposite to the opposite direction. The geometrically shaped bodies 104 on the other turned sheet unit 30 are aligned along the second direction D2 and integrally connected. Wherein, in the reversely turned sheet unit 30, the positions of the high point and the low point are exchanged. Of course, any two adjacent sheet units 30 can also be turned over around a rotation axis parallel to the first direction D1 (for example, the long side of the sheet unit 30 ) with the same turning direction, and then move and adjust along the first direction D1 to A certain distance is staggered, so that, as mentioned above, the first geometrical body on the first sheet unit and the second geometrical body on the adjacent second sheet unit are alternately arranged in sequence along the first direction D1. Thus, based on any of the above-mentioned arrangement inversion rules, the entire unit assembly 100 can be formed strictly correspondingly.

The eighth embodiment shown in Figures 8a and 8b is different from any of the first to seventh embodiments. In the eighth embodiment, the shape and structure of each sheet unit 30 constituting the unit assembly 100 are different, that is, at least two types of geometric sheet units are included to form a combined splicing of special-shaped sheet units. For example, the geometric inner hole 105 in a sheet unit 30 shown in FIG. The spans of the geometric bodies 104 in the seed sheet unit 30 along the first direction D1 may be different.

Since at least two types of geometric sheet units are included, the entire unit assembly 100 has various axial through holes 101 of different shapes. For example, among the plurality of axial through-holes 101 in the uppermost first row spaced along the first direction D1 shown in FIG. Geometric inner holes 105 in the shape of a semiregular hexagonal hole are formed by splicing together. Among the plurality of axial through-holes 101 in the second row above, there are two kinds of axial through-holes 101 alternately spaced along the first direction D1, and one of the axial through-holes 101 is geometrically spaced by a semiregular hexagonal hole shape. The hole 106 is composed of two geometric inner holes 105 in the shape of a semi-rhombic hole, and the other axial through hole 101 is composed of a geometric interval hole 106 in the shape of a semi-regular hexagonal hole and a geometric inner hole 105 in the shape of a semi-rhombic hole. constitute. It can be seen from Fig. 8b that when the geometric sheet units of different shapes and structures constitute the combined splicing of special-shaped sheet units, not all high points 102 and low points 103 can be connected correspondingly, and some high points 102 or low points 103 can be in the form of Dangling.

It should be noted that, when combining and splicing the above-mentioned special-shaped sheet units, other combinations such as half-diamond-shaped holes and half-waist-shaped holes can also be spliced to form axial through holes 101 . In addition, the contact surface of the contact portion between the sheet units 30 is not limited to the contact of the same type, and may also be, for example, a butt joint between a plane and an arc. In the unit assembly 100, the shape of the axial through hole 101 is not limited to the shapes shown in the drawings, and may also be a regular quadrilateral, a circle, etc., which will not be described in detail here.

In addition, the sheet unit 30 may have a single-layer sheet structure or a multi-layer sheet structure. As shown in FIG. 10 , the geometric sheet unit 32 includes three layers A, B, and C, and the materials of each layer can be the same or different. Where two adjacent layers have the same material, they can be regarded as the same layer. When the adjacent geometric sheet units 32 are combined to form the unit body assembly 100, the combination method can be A-A-C-C contact, that is, the A layer of the geometric sheet unit 32 is combined with the A layer of the geometric sheet unit 32 adjacent on one side, At the same time, the C layer of the geometric sheet unit 32 is combined with the C layer of the adjacent geometric sheet unit 32 on the other side. Of course, it can also be a combination of A-C-A-C or A-A-C-C-A-C, or a combination of two or more of the above-mentioned ways. When there is an A-C combination in the combination mode, the adjacent geometric sheet units 32 can be staggered by a certain distance and then combined.

The thermoplastic core material with a simple and novel honeycomb structure has been described above in conjunction with the accompanying drawings. The core material can be formed by simple and regular arrangement and polymerization of a single sheet unit 30, which is convenient for processing and manufacturing and reduces costs. It will be described in detail below. But the advantages of the thermoplastic core material of the present invention are not limited thereto, more importantly, due to the processing convenience described below, the thermoplastic core material according to the present invention can have a larger wall thickness, can be filled with other reinforcing materials, etc., thereby Achieve high strength, especially suitable for heavy-duty fields, etc.

The thermoplastic core material of the existing circular tube honeycomb or semi-closed folded honeycomb needs to adopt blister or blow molding process in the molding process, which limits the maximum hole wall of the honeycomb hole, and the process flow is discontinuous, and the processing efficiency is low. high cost. When the maximum wall thickness is limited, the intermediate filling material is prone to breakage, thereby destroying the structure of the core material and forming unqualified products. In the embodiment of the present invention, the sheet unit 30 is formed by pressing the flat sheet 10 or directly extruding the profile 10' without blow molding or blistering, so there is no process limitation in terms of wall thickness. Referring to Fig. 1b, in the axial through hole 101, the peripheral wall of the axial through hole 101 is divided into the wall thickness of the contact part and the wall thickness of the non-contact part. In the thermoplastic core material of the present invention, the axis of the axial through hole 101 The minimum thickness of the wall around the hole should not be less than 0.1mm, and the maximum thickness of the wall around the shaft hole is not limited by the processing technology. It can be designed according to requirements, and on the basis of ensuring light weight and heavy load, it can prevent the wall from breaking. In addition, the diameter of the circumscribed circle of the axial through hole 101 of any shape can preferably be set to not less than 1mm; The ratio of the diameters of the circumscribed circles is preferably set to be no greater than 200, so that the core material can achieve a better effect of heavy load and light weight.

In the present invention, the material of sheet unit 30 adopts thermoplastic material instead of metal forming materials such as aluminum and iron, so as to realize its own weight reduction, so the material of sheet unit 30 can include thermoplastic polymer, filler-filled thermoplastic polymer , fiber-reinforced thermoplastic resin-based composites and/or plastically deformable paper, steel-plastic composites, and the like. As examples, thermoplastic polymers can be polypropylene, polyethylene, polyamide, thermoplastic polyester, polyvinyl chloride, polystyrene, polycarbonate, polyphenylene ether, thermoplastic elastomer, multi-polymer thermoplastic, polymethacrylic acid One of methyl ester, polyphenylene sulfide, polyether ether ketone and polyimide or a blend of more than one of them. In filler-filled thermoplastic polymers, fillers can be organic, inorganic, or both. Specifically, fillers can be wax, talcum powder, carbon black, white carbon black, kaolin, calcium carbonate, stearic acid, hard One or a combination of calcium fatty acid, whiskers, titanium dioxide, iron oxide, pigments, flame retardants and antioxidants. The fibers in the fiber-reinforced thermoplastic resin-based composite material may be one or more of organic fibers, inorganic fibers, metal fibers, polymer fibers, and plant fibers. Fibers in the thermoplastic resin-based composite material reinforced by fibers can be glass fibers, carbon fibers, basalt fibers, steel wire fibers, polypropylene fibers, polyester fibers, ultra-high molecular weight polyethylene fibers, polyimide fibers and hemp fibers one or a combination of several of them.

As shown in Figure 10, the sheet unit 30 or the sheet 10 or profile 10' used to process and form the sheet unit 30 can be a single-layer structure or a multi-layer structure, such as the sandwich sandwich structure shown in the figure, which can include an intermediate A layer of filling material, such as layer B shown in the illustration. The middle layer of filler material may be a reinforcing filler material and/or a functional filler material. The reinforced filler material can significantly enhance the strength of the core material, and can also be filled with functional filler materials, such as flame-retardant materials and/or sound-insulating materials, to achieve functions such as flame-retardant and sound insulation. This kind of thermoplastic core material with filler material that can achieve a larger wall thickness can be well used in various fields that require high light weight and high strength, such as various delivery vehicles with increasingly heavy loads, especially It is a heavy-duty electric coal transport train, or an electric logistics vehicle that needs to lighten the car body due to insufficient battery life.

In order to obtain a thermoplastic core material that meets the requirements and can realize light weight and heavy load, in the molded unit assembly 100 shown in Fig. Quantify. Referring to Figure 1a, in any plane of the unit assembly 100 defined by the first direction D1 and the second direction D2 and intersecting the unit assembly 100 entity, that is, in any cross-sectional plane of the unit assembly 100, the plane void ratio It should not be lower than 40%, and further, the planar void ratio should not be lower than 60%. In the above-mentioned cross-sectional plane of the unit assembly 100, the plane porosity is the ratio of the sum of the hole cross-sectional areas of the axial through holes 101 to the total planar area of the cross-sectional plane.

While reducing weight, in order to achieve heavy loads, in addition to material selection, the volume utilization of materials should also be improved, that is, the mass ratio or volume ratio of the effective part that can bear the load to the overall part along the direction of the load force. Generally speaking, the real force-bearing part along the load-bearing direction is the effective part bearing the load, while the material part or hollow part perpendicular to the load-bearing direction is the invalid part bearing the load, and the material volume utilization rate of the invalid part is 0 . As an example, in FIG. 1a, when the third direction D3 is the direction of bearing the compressive load, the material volume utilization rate of the unit assembly 100 is not lower than 60%, preferably, the material volume utilization rate is not lower than 80%.

Among them, regarding the definition of material volume utilization rate, when the material is subjected to compressive load, the ratio of the material volume of the highest height part of the material along the load direction to the total material volume is is the material volume utilization. Since the material is usually difficult to be in a regular shape, there are defects at both ends, in the middle or other combined defects, etc., for the sake of easy understanding and combined with the content of the patent invention, the possible situations are divided into five categories, the first category is full penetration , the second type is a defect at one end, the third type is a defect at both ends, the fourth type is a defect in the middle, and the fifth type is a combined type.

Specifically, Fig. 11a-Fig. 11e' respectively illustrate the calculation descriptions of the above five types of situations, in which, the compressive load direction is the Y direction, Y ₀ is the highest height of the material, Y ₁ is the height of the solid material, and Y ₂ is Defect height and material volume utilization are both S ₁ /S ₀ , S ₀ is the global area, S ₁ is the effective area, and the calculation formula of S ₀ is S ₀ =∑dxdy. The description of the calculation of the effective area S ₁ of the five types of situations will be described one by one below. It should be noted that, in order to define the material volume utilization ratio simply, the definition of the material volume utilization ratio uses the cross-sectional area to refer to the material volume. S ₀ can be used to replace the total volume of the material, and S ₁ can be used to replace the effective volume of the material; if the cross-section along the Z direction is different from the existing diagram, the total volume is the actual volume, and the effective volume is any cross-section that satisfies the above definition The sum of the volumes of the solids of the effective cross-section. Moreover, considering that when the material is not damaged, it will undergo certain deformation under load, so that the original cumulative height is slightly lower than the maximum height and can bear the load, but the deformation of the material is limited, so the cumulative height is specified to be greater than or equal to 95 The highest height of the material in this direction, that is, Y ₁ ≥0.95Y ₀ , Y ₂ ≤0.05Y ₀ .

When the structure of the thermoplastic core material is fully through, see Figure 11a, Figure 11a', the shaded part of Figure 11a shows the total cross-section of the load-bearing wall, the total cross-sectional area of the load-bearing wall is S ₀ ; the energy contribution in the load direction The effective part of the load-bearing wall of the supporting force is the shaded part in Fig. 11a', and its area is S ₁ , where S ₁ =S ₀ =Σdxdy. When the structure of the thermoplastic core material has defects at one end, refer to Figure 11b and Figure 11b', the shaded part of Figure 11b shows the total cross-section of the load-bearing wall, the total cross-sectional area of the load-bearing wall is S ₀ ; The effective part of the bearing wall that contributes the support force is the shaded part in Fig. 11b', and its area is S ₁ , where S ₁ =∑dxdy|Y ₀ ≥y≥Y ₁ . When the structure of the thermoplastic core material has defects at both ends, refer to Fig. 11c and Fig. 11c', the shaded part of Fig. 11c shows the total cross-section of the load-bearing wall, and the total cross-sectional area of the load-bearing wall is S ₀ ; The effective part of the bearing wall that contributes the support force is the shaded part in Fig. 11c', and its area is S ₁ , where S ₁ =∑dxdy|Y ₀ ≥y≥Y ₁ . When the structure of the thermoplastic core material is an intermediate defect, see Figure 11d and Figure 11d', the shaded part of Figure 11d shows the total cross-section of the load-bearing wall, and the total cross-sectional area of the load-bearing wall is S ₀ ; The effective part of the supporting wall is the shaded part in Fig. 11d', and its area is S ₁ , where S ₁ =∑dxdy|Y ₀ ≥y≥Y ₀ −Y ₂ . When the structure of the thermoplastic core material is a combined defect, see Figure 11e and Figure 11e', the shaded part of Figure 11e shows the total cross-section of the load-bearing wall, and the total cross-sectional area of the load-bearing wall is S ₀ ; The effective part of the bearing wall that contributes the support force is the shaded part in Fig. 11e', and its area is S ₁ , where S ₁ =∑dxdy|Y ₀ ≥y≥Y ₁ and Y ₀ ≥y≥Y ₀ −Y ₂ .

In order to process the above-mentioned honeycomb-shaped thermoplastic core material, in the embodiment shown in Fig. 12 and Fig. 13, the first production method of the thermoplastic core material is provided. The processing and forming process of the unit assembly 100 will be described below with reference to the unit assembly 100 having axial through holes 101 in the shape of regular hexahedral honeycomb holes 101 shown in FIGS. 1 a to 1 e as an example.

Referring to Fig. 12 and Fig. 13, the production method of the thermoplastic core material includes the following steps of continuous operation of the assembly line:

S121. Continuously output the flat sheet 10 along the output direction X of the assembly line;

S122. Divide and process the sheet 10 into a plurality of sheet units 30 having the same width along the output direction Y of the broad side of the sheet 10 and in the shape of a belt along the output direction X of the assembly line, wherein at least part of the sheet units The surface of the sheet material 30 is processed with non-closed geometric shapes 104 repeatedly presented along the pipeline output direction X;

S123, each sheet unit 30 that has been divided and processed is reversed at a predetermined angle, so that the length direction L of the reversed sheet unit 30 is kept along the line output direction X, and the width direction W of the sheet unit 30 is consistent with the direction of the sheet 10. An angle a is formed between the broadside output directions Y;

S124 , gathering and stacking and splicing each flipped sheet unit 30 into a unit assembly 100 along the broadside output direction Y.

It can be seen that the above-mentioned production method guarantees the production continuity of the thermoplastic core material, and can be produced in an automated assembly line. The unit assembly 100 that is continuously output from the downstream end of the assembly line is processed through the sheet material 10 continuously output from the upstream end of the assembly line. Or interrupted intermittent production mode, the production efficiency is greatly improved, so that it has a large basis for universal mass production and greatly reduces the cost of finished products. Among them, the crests and troughs of the honeycomb structure are directly pressed on the sheet 10 by means of rolling, that is, the geometric body 104, etc., without steps such as blistering or blow molding, so that the wall thickness of the sheet can have a larger wall thickness. It is thick and can be filled with more reinforcing materials, so that the unit assembly 100 after roll forming can also have a larger wall thickness, high strength, and no material waste, realizing economical production.

In comparison, there are mainly two types of thermoplastic resin-based honeycomb cores currently used in large quantities. One is the circular tube honeycomb core. Thick and thin tubes with a wall thickness of 0.1-0.3 mm are formed, and multiple thin tubes are stacked into a lump and placed in an oven so that the outer layer of low-temperature material melts and the inner layer of high-temperature material remains solid, and then cut according to requirements after cooling. The second is a semi-closed folded honeycomb. The main process is that the continuous material is produced by plastic deformation perpendicular to the material surface, thereby forming a semi-hexagonal cell wall and a small connection area. By folding along the transmission direction, the cells avoid meeting, Thus forming a honeycomb structure. The process of the first type of round tube honeycomb is simple, but due to discontinuous production, that is, there is a heating and cooling process in the oven, resulting in low production efficiency and high production costs of round tube honeycomb. There is a blow molding link in the molding process, resulting in no Filled with functional fillers and reinforcing fillers, the application occasions are limited. The second kind of semi-closed folded honeycomb process is continuous in production, but its semi-closed structure leads to a lot of material waste, and there is a plastic-absorbing link in the forming process, which makes it impossible to fill the material with functional fillers and reinforcing fillers, and its application is limited.

However, the present invention can completely solve the problems of high cost, material waste and inability to fill functional fillers and reinforcing fillers in the above two solutions, and provides a novel fillable, low-cost, economical honeycomb core material and its production method and Production equipment.

In the production method of the present invention, the flat sheet 10 can be continuously output through the outlet of the thermoplastic material forming equipment 1 , and can be continuously moved and output on the horizontal assembly line operation platform along the output direction X of the assembly line. In order to facilitate the understanding of the orientation of the sheet 10 and the sheet unit 30 at different stages in the processing process and the orientation relationship with each other, in the embodiments of the various production methods and production equipment shown in the accompanying drawings, the absolute coordinate system and the relative coordinate system are defined. Coordinate System. Wherein, the sheet 10 is output smoothly without turning over, so the output direction X of the assembly line and the output direction Y of the broadside are the length direction and the width direction of the sheet 10 . Therefore, it can be considered to define the absolute coordinate system by the forming exit of the sheet forming equipment or the starting position of the assembly line operation platform. In each method and device embodiment shown in the accompanying drawings, the absolute coordinate system includes the output direction X of the assembly line, the output direction Y of the broadside, and the vertical direction Z of the assembly line platform, and the origin position is set at the forming outlet of the sheet forming equipment or the assembly line operation platform The starting position of the starting point, the line output direction X, and the broadside output direction Y jointly define the horizontal platform surface of the line work platform or the sheet surface of the sheet 10 horizontally output from the forming outlet. At the same time, a dynamic coordinate system is defined for the sheet unit 30, that is, the width direction W (ie, the third direction D3 in FIG. 1e) and the length direction L (ie, the first direction D1 in FIG. 1e) of the sheet unit 30 can be clearly understood. The positional relationship of the sheet unit 30 before and after turning in the processing process is clearly displayed.

As shown in FIG. 12 , the production method of this embodiment may roughly include an output step, a segmentation processing step, a turning step, and a gathering and splicing step. Wherein, in the segmentation and processing step S122, according to the sequence of segmentation and processing, optionally, the step S122 may include sub-steps:

S1221, cutting the sheet 10 along the output direction X of the assembly line and dividing it into a plurality of sheet unit belts 20 having the same width along the output direction Y of the broad side of the sheet 10;

S1222. Correspondingly process geometric shapes 104 on at least part of the sheet surface of the sheet unit belt 20, so as to form a plurality of sheet units 30 in a belt shape along the output direction X of the assembly line;

Wherein, in the sub-step S122, the sheet unit strip 20 processed with the geometric body 104 is formed into a geometric sheet unit, and the sheet unit strip 20 of the unprocessed geometric body 104 is formed into a flat sheet unit. In the embodiment shown in FIG. 13 , the sheet unit 30 processed and formed by substep S122 is a geometric sheet unit, the length direction L of the sheet unit 30 is along the line output direction X, and the width direction W of the sheet unit 30 is Parallel to the broadside output direction Y.

Optionally, step S122 may also include sub-steps:

S1221', machining a geometric body 104 on at least part of the surface of the sheet 10;

S1222', cutting the processed sheet 10 with equal width along the output direction Y of the broadside to form a plurality of sheet units 30 extending in a strip shape along the output direction X of the assembly line.

As shown in FIG. 13 , the outer peripheral portion of the geometrical body forming assembly 2 for processing the geometrical body 104 is formed with a protruding edge crimping portion extending continuously along the broadside output direction Y, so that the sheet can be A geometric shape body 104 is processed on the entire surface of the sheet material of 10, and a plurality of belt-shaped geometric sheet material units as shown in FIG. 13 are formed after equal width cutting. If a flat sheet unit needs to be formed, the edge crimping parts of the geometric body forming assembly 2 shown in FIG. 13 can be discontinuously arranged along the broadside output direction Y, for example, arranged at intervals.

In the dividing processing step S122, when processing the geometric shape body 104, the sheet unit 30 should be kept parallel to the sheet 10, and a surface perpendicular to the sheet should be processed on the sheet surface of the corresponding sheet 10 or sheet unit belt 20. The surface of the sheet is a raised geometric convex part, and a geometric inner hole 105 is formed in the geometric convex part along the output direction Y of the wide side and is not closed on the surface of the sheet, so that the geometric body 104 is processed. In Fig. 13, when the geometric shape body 104 is rolled out perpendicular to the sheet surface direction of the sheet material 10, the geometric inner hole centerline OO' of the geometric shape body 104 on the processed sheet unit 30 should be parallel to the width Edge output direction Y. Wherein, the processing method of the geometric body 104 may adopt, for example, roller die extrusion, plate die extrusion, or chain die extrusion. The output processing method of the sheet 10 can be extrusion, calendering, casting or rolling processing and the like.

In the turning step S123 , through turning over, the length direction L of the turned over sheet unit 30 is kept along the line output direction X, and an angle a is formed between the width direction W and the wide side output direction Y. The value range of the included angle a can be between 20° and 160°. For example, when a=20° or 160°, the axial through hole 101 is in the shape of an oblique hole. In FIG. 13 , the included angle a is preferably 90°, that is, the center line OO' of the geometric inner hole of each geometric shape body 104 of the flipped sheet unit 30 is perpendicular to the sheet surface of the sheet 10, that is, the geometric inner hole The hole centerline OO' is along the vertical direction Z of the pipeline platform. Referring to Fig. 13, the flipped sheet unit 30 is perpendicular to the sheet 10, the geometric body 104 protrudes along the broadside output direction Y, and the axial direction of the geometric inner hole 105 in the geometric protrusion is vertical along the vertical direction Z of the assembly line platform on the surface of the sheet 10.

Specifically, in the overturning step, each sheet unit 30 can be overturned by a preset angle around its respective rotation axis PP' along the output direction X of the assembly line. The preset angle is the width direction W and the broadside output direction Y The angle a between. In the embodiment shown in FIG. 13 , the flipping direction of any two adjacent sheet material units 30 can be reversed and the preset angles of flipping are both 90°, and each sheet material unit 30 after flipping is in a plate-to-plate opposing type. grid plate distribution. The board-to-board distribution of the reversed sheet unit 30 means that when they are brought closer to each other along the output direction Y of the wide side and spliced, a plurality of circumferentially closed axial through holes spaced sequentially along the output direction X of the assembly line can be formed. 101, forming a complete single honeycomb unit body as shown in Figure 1b.

In FIG. 13 , each sheet unit 30 is a geometric sheet unit and the geometric bodies 104 are the same. When any two adjacent sheet units 30 are reversed in opposite directions, it is not necessary to move and adjust in the output direction X of the assembly line. The unit assembly 100 shown in FIG. 1a and FIG. 1c can be formed by splicing. The unit assembly 100 of any one of the first embodiment to the seventh embodiment can adopt the above-mentioned flipping method, and the movement adjustment along the output direction X of the pipeline is unnecessary.

Of course, during the inversion process, the output speed after inversion along the output direction X of the assembly line can also be controlled, so as to adjust the alignment position of each sheet unit 30 by moving along the output direction X of the assembly line. For example, when forming the unit assembly 100 shown in the eighth embodiment, since the sheet unit 30 includes two types with different shapes and structures, the output speed after the overturning of the sheet unit 30, that is, the output pace, etc., can be adjusted to realize Precise alignment along the broadside output direction Y.

In the step of gathering and splicing in this embodiment, S124 may include substeps:

S1241, gather each sheet unit 30 along the broadside output direction Y, make any adjacent sheet material units 30 abut against each other along the broadside output direction Y, and form a plurality of circumferentially closed ones spaced sequentially along the pipeline output direction X Axial through hole 101;

S1242 , melting and bonding the contact portions between the gathered and abutted sheet material units 30 to form the unit assembly 100 .

That is, step S124 may include a gathering sub-step followed by a fusion bonding sub-step. Wherein, the fusion bonding method between the sheet units 30 in the sub-step S1242 can be hot-melt splicing, ultrasonic splicing or infrared splicing, etc. In addition, alternative mechanical connections and the like can also be used.

Of course, after the strip-shaped sheet unit 30 is formed in step S122, colloid is applied on the contact surface (ie the surface of the high point 102 or the low point 103) of the contact portion for splicing contact on each sheet unit 30 , that is, the adhesive layer, which is used for the contact portion of the two to be directly bonded and formed after the abutting sheet unit 30 is subsequently gathered.

In addition, as mentioned above, when outputting the sheet material 10 and processing the sheet material unit 30, care should be taken to make the assembled sheet material unit 30 meet specific parameter requirements and achieve the required light weight and heavy load functions. For example, when the vertical direction of the sheet surface of the sheet 10 is the direction of bearing the compressive load, the material volume utilization rate of the unit assembly 100 is not lower than 60%, preferably, the material volume utilization rate is not lower than 80%; and Or, on the cross-section of the core material of the unit assembly 100 parallel to the sheet surface of the sheet 10, the planar void ratio is not lower than 40%, further, the planar void ratio is not lower than 60%.

Corresponding to the production method of the thermoplastic core material in the above embodiment, a production equipment of the thermoplastic core material is also provided correspondingly, as shown in FIG. 13 , the production equipment includes:

Thermoplastic material molding equipment 1, used for continuously outputting flat sheets 10 along the output direction X of the assembly line;

The sheet unit processing and forming component is used to process the sheet 10 into a plurality of sheet units 30 with the same width along the broadside output direction Y and a belt shape along the line output direction X, wherein at least part of the sheet units 30 are The surface of the material is processed with a non-closed geometric shape body 104 that is repeatedly presented along the output direction X of the assembly line;

The guide and positioning assembly 5 is used to turn over the predetermined angles of each strip-shaped sheet unit 30 after division and processing, so that the length direction L of the turned over sheet unit 30 remains along the line output direction X, and the sheet unit 30 An angle a is formed between the width direction W and the broadside output direction Y;

The fusion bonding assembly 8 is used for heating each sheet unit 30 to form the unit assembly 100 by fusion bonding.

Wherein, referring to FIG. 13, the sheet unit processing and forming assembly may include:

The cutting assembly 4 is used to cut the sheet 10 along the output direction X of the assembly line and divide it into a plurality of sheet unit belts 20 having the same width along the output direction Y of the broad side of the sheet 10;

The geometric body forming assembly 2 is used to form a raised geometric bulge perpendicular to the surface of the sheet on at least part of the sheet surface of the sheet unit belt 20. The direction Y axially passes through and forms an open geometric inner hole 106 on the surface of the sheet.

Optionally, the positions of the cutting assembly 4 and the geometric body forming assembly 2 can also be exchanged, that is, processing first and then cutting, so the sheet unit processing forming assembly can also include:

The geometric shape body forming component 2 is used to form a raised geometric protrusion perpendicular to the surface of the sheet material on at least part of the sheet material surface of the sheet material 10. A geometric inner hole 106 that runs through the axial direction and is not closed on the surface of the sheet;

The cutting assembly 4 is used for cutting the sheet 10 along the output direction X of the assembly line and dividing it into a plurality of sheet units 30 having the same width along the output direction Y of the broad side of the sheet 10 .

Further, the production equipment may also include:

The gathering component 7 is used for gathering each sheet unit 30 along the broadside output direction Y.

The gathering assembly 7 can be arranged separately, and can achieve the purpose of gathering from both sides to the center through structural methods such as gradually narrowing guide rail side walls.

In Fig. 13, thermoplastic material molding equipment 1, cutting assembly 4, geometric body forming assembly 2, guiding and positioning assembly 5, gathering assembly 7 and fusion bonding assembly 8 are all arranged in sequence along the output direction X of the assembly line, so as to adapt to Pipeline continuous production operation. Of course, the positions of the cutting component 4 and the geometric body forming component 2 can also be interchanged.

Wherein, the geometric body forming component 2 adopts a pressure roller component. Referring to FIG. 13 , the rotation axis of the illustrated pressing roller assembly is along the output direction Y of the broadside of the sheet 10 and the peripheral wall of the roller body is formed with protruding edge crimping portions spaced along the circumferential direction. In particular, since each sheet unit belt 20 needs to be processed separately, the geometric body forming assembly 2 and the guiding and positioning assembly 5 both include a plurality of cutter units and a plurality of cutting blades arranged in sequence along the second direction D2 with the same number. Steering unit.

It should be noted that, the sheet material 10 in FIG. 13 is extruded through an extrusion die, of course, alternative methods such as sheet casting, sheet calendering, and sheet rolling may also be used. The processing method of the geometric body 104 adopts the roller die extrusion of the pressure roller assembly, of course, plate die extrusion or chain die extrusion can also be used to achieve the purpose of processing and shaping the geometric body 104 . The guiding and positioning assembly 5 is in the form of a guiding box, but it can also be in the form of guiding rollers. Similarly, the fusion bonding assembly 8 adopts a heating box, but ultrasonic welding, infrared heating, etc. can also be used, so that corresponding functional equipment can be selected.

Corresponding to the production method of thermoplastic core material shown in Figure 12, another production equipment for thermoplastic core material is also provided correspondingly, the production equipment includes:

Thermoplastic material molding equipment 1, used for continuously outputting flat sheets 10 along the output direction X of the assembly line;

The sheet material unit processing and forming assembly is used to divide and process the sheet material 10 into a plurality of sheet material units 30 having the same width along the broadside output direction Y of the sheet material 10 and a belt shape along the pipeline output direction X, at least part of which The sheet surface of the sheet unit 30 is processed with non-closed geometric shapes 104 repeatedly presented along the pipeline output direction X;

Glue gun 3, is used for coating the bonding layer on the contact surface of each sheet unit 30;

The guide and positioning assembly 5 is used to turn over the predetermined angles of each strip-shaped sheet unit 30 after division and processing, so that the length direction L of the turned over sheet unit 30 remains along the line output direction X, and the sheet unit 30 An included angle is formed between the width direction W and the broadside output direction Y of the sheet 10;

The gathering component 7 is used for gathering each sheet unit 30 along the broadside output direction Y and bonding them into a unit assembly 100 .

The difference from the production equipment shown in FIG. 13 is that this production equipment adopts the glue method, so that the fusion bonding component 8 can be omitted.

Likewise, the positions of the cutting assembly 4 and the geometric body forming assembly 2 can be exchanged.

Wherein, the geometric body forming assembly 2 can be a pressure roller assembly, and the glue gun 3 can be a roller body glue gun (not shown) with the same shape and structure, and the respective rotation axes of the pressure roller assembly and the roller body glue gun are all along the widthwise output direction Y, the peripheral wall of the roller body of the pressure roller assembly is formed with protruding edge crimping parts spaced along the circumferential direction, and the peripheral wall of the roller body of the roller body glue gun is formed with groove-shaped edge gluing parts spaced along the circumferential direction , the number of the edge crimping portion and the edge gluing portion are the same and they are arranged in the same circumferential direction.

Similarly, referring to Fig. 14, the present invention also provides a second production method of thermoplastic core material, which includes the following steps of continuous operation of the assembly line:

S141. Continuously output the flat sheet 10 along the output direction X of the assembly line;

S142, cutting the sheet 10 along the output direction X of the assembly line and dividing it into a plurality of sheet unit belts 20 having the same width along the output direction Y of the broad side of the sheet 10;

S143, guiding and turning over each sheet unit belt 20 and arranging them to be sequentially arranged at intervals along the broadside output direction Y;

S144. Process each sheet unit belt 20 into a corresponding sheet unit 30, wherein on at least part of the sheet surface of the sheet unit belt 20, correspondingly process a non-closed geometric shape repeatedly presented along the pipeline output direction X 104;

S145 , gather and stack the sheet units 30 along the output direction Y of the broadside to form a unit assembly 100 .

The same as the first production method of thermoplastic core material and its production equipment shown in Fig. 12 and Fig. 13, the second production method of thermoplastic core material and its production equipment shown in Fig. 14, Fig. 15a to Fig. 15d are also the same The continuous production operation is realized, thereby bringing many advantages, which will not be repeated here.

The difference is that in this embodiment, the rolling operation is performed after the sheet unit belt 20 is turned over, that is, the sheet unit 30 is directly processed on the arranged sheet unit belt 20, so that the same or different shapes and structures can be processed easily. The same sheet unit 30 can be processed into different geometric sheet units or unprocessed flat sheet units by using different processing methods. Even on the same sheet unit 30 , different types of geometric bodies 104 can be processed conveniently.

Therefore, in this embodiment, in step S143, the sheet unit belt 20 after being guided and reversed is extended along the line output direction X, and the sheet surface of the sheet unit belt 20 and the sheet surface of the sheet 10 form a plane clip. Angle a'. The value range of the plane angle a' may be 20°-160°. In the specific embodiment of Fig. 14, said plane included angle a'=90°, the sheet material surface guide of each sheet material unit belt 20 is turned over to be perpendicular to the sheet material surface of sheet material 10, and each sheet material unit belt 20 forms It is distributed in the shape of a grid plate with plates opposed to each other along the output direction Y of the wide side.

In step S144, when processing the geometric body 104, the geometric inner hole centerline OO' on the processed sheet unit 30 is perpendicular to the sheet surface of the sheet 10, that is, the geometric inner hole centerline OO' is along the line platform Vertical direction Z. Therefore, the rolling rotation axis of the geometric body forming assembly 2 should be perpendicular to the surface of the sheet, and each sheet unit belt 20 is equipped with a set of crimping rollers. Referring to Fig. 15a, in the specific processing process, the sheet unit belt 20 is kept perpendicular to the sheet material 10, and the geometric protrusions that are raised along the broadside output direction Y are processed on the surface of the sheet material unit belt 20. A geometric inner hole 105 axially penetrating along the vertical direction of the sheet surface of the sheet 10 and opening on the sheet surface of the sheet unit belt 20 is formed in the geometric protrusion, thereby processing a geometric body 104 .

In step S144, when each sheet unit 30 belongs to the same type, that is, when the shape and structure of each geometric body 104 are the same, as mentioned above, only the respective roller pressing pairs of the geometric body forming assembly 2 need to work synchronously , can be precisely aligned after being folded, and stacked and spliced to form a unit assembly 100 . However, if it is necessary to process different types of sheet unit 30 as shown in Fig. 8a and Fig. 8b, the rolling stroke or operating frequency of the geometric body forming assembly 2 can be adjusted to complete the precise alignment after crimping. Layered stitching.

Similarly, the output processing method of the sheet 10 can be selected as extrusion, calendering, casting or rolling processing, etc., and the processing method of the geometric body 104 can be selected as roller die extrusion, plate die extrusion or chain die extrusion. Die extrusion and so on.

Wherein, step S145 may further include sub-steps:

S1451a, gather each sheet unit 30 along the broadside output direction Y;

S1452a, melting and bonding the gathered sheet units 30 by means of baking and heating to form a unit assembly 100 by lamination and splicing. That is, step S145 may include a gathering sub-step followed by a fusion bonding sub-step. It should be noted that when a baking oven is used in Figure 15a, the stability of the baking temperature and the accuracy of the baking time should be controlled.

The method of first gathering and then heating and bonding is adopted above, but it is also possible to apply glue first and then gather and bond. That is, optionally, step S145 may further include sub-steps:

S1451b, coating an adhesive layer on the contact portion for contact connection between any adjacent sheet units 30;

S1452b. Gather each sheet unit 30 along the broadside output direction Y and glue each other to form a unit assembly 100 .

That is, step S145 may include the sub-step of applying glue and the subsequent sub-step of gathering and bonding. At this time, the setting of the glue gun is more critical, and the glue gun should be designed similarly to the profiling roller to accurately coat the glue on the corresponding contact surface.

After S145, after the sheet unit 30 is folded up along the broadside output direction Y and stacked and spliced into the unit assembly 100, the stacked and spliced unit assembly 100 includes the splicing of the geometric shapes 104 and sequentially along the pipeline output direction X. A plurality of shaft hole structures are arranged, and the shaft hole structure includes an axial through hole 101 and a circumferentially closed shaft hole peripheral wall surrounding the axial through hole 101 . Wherein, the sheet unit 30 can also be moved and adjusted along the output direction X of the assembly line to achieve precise alignment.

In step S141, the thickness of the continuously extruded sheet 10 is not less than 0.1 mm. The continuously extruded sheet 10 may comprise a sandwich structure of intermediate layers of filler material. The intermediate filling material layer may be various types of reinforcing filling materials and/or functional filling materials and the like. The thermoplastic material selection and possible layered structure of the sheet 10 have been mentioned above, and will not be repeated here.

It should be emphasized that, as mentioned above, when outputting the sheet 10 and processing the sheet unit 30, care should be taken to make the assembled sheet unit 30 meet specific parameter requirements and achieve the required light weight and heavy load functions. For example, when the vertical direction of the sheet surface of the sheet 10 is the direction of bearing the compressive load, the material volume utilization rate of the unit assembly 100 is not lower than 60%, preferably, the material volume utilization rate is not lower than 80%; and Or, on the cross-section of the core material of the unit assembly 100 parallel to the sheet surface of the sheet 10, the planar void ratio is not lower than 40%, further, the planar void ratio is not lower than 60%.

Corresponding to the second production method of the thermoplastic core material in the above embodiment, a production equipment for the thermoplastic core material is provided accordingly, as shown in FIG. 15a, the production equipment includes:

Thermoplastic material molding equipment 1, used to continuously extrude a flat sheet 10 along the output direction X of the assembly line;

The cutting assembly 4 cuts the sheet 10 along the output direction X of the assembly line and divides it into a plurality of sheet unit belts 20 having the same width along the output direction Y of the broad side of the sheet 10;

The guiding and positioning assembly 5 is used to guide and reverse each sheet unit belt 20 and arrange them to be arranged at intervals along the broadside output direction Y;

The geometrical body forming component 2 is used to form, on at least part of the sheet unit belt 20 , non-closed geometrical bodies 104 sequentially distributed along the line output direction X to form corresponding sheet units 30 .

According to the optional bonding method, the production equipment can further include:

The fusion bonding assembly 8 is used for heating the sheet units 30 arranged at intervals along the broadside output direction Y so as to be capable of fusion bonding into a unit assembly 100 .

In addition, production equipment may also include:

The gathering component 7 is used for gathering each sheet unit 30 along the broadside output direction Y. Setting up a special gathering component 7 helps to gather each sheet unit 30 quickly and accurately, so that the alignment along the output direction Y of the broadside is accurate after gathering. The gathering assembly 7 may preferably be arranged upstream of the feeding fusion bonding assembly 8 .

Referring to Fig. 15a, thermoplastic material molding equipment 1, cutting assembly 4, guiding and positioning assembly 5, geometric body forming assembly 2, gathering assembly 7 and fusion bonding assembly 8 can be arranged in sequence along the output direction X of the assembly line, so as to facilitate assembly line production Operation.

When using the adhesive bonding method, the production equipment may include:

A glue gun 3 for applying an adhesive layer on the contact portion between the sheet units 30 for contact connection; and

The gathering component 7 is used for gathering the sheet material units 30 coated with the bonding layer along the broadside output direction Y to form a unit assembly 100 by glueing each other.

Similarly, the thermoplastic material forming equipment 1 , cutting component 4 , guiding and positioning component 5 , geometric body forming component 2 , glue gun 3 and gathering component 7 can be arranged in sequence along the output direction X of the assembly line. Wherein, the geometric body forming assembly 2 can be a pressing roller assembly, and the pressing roller assembly includes multiple pairs of pressing rollers with the same number as the plurality of sheet unit belts 20, arranged oppositely on both sides of the surface of the sheet unit body 20. The guide positioning assembly 5 is preferably a guide roller assembly. As shown in FIG. 12 , each sheet unit belt 20 includes two guide rollers, and the two guide rollers are arranged at intervals along the broadside output direction Y. The guiding and positioning component 5 may adopt a guiding roller or a guiding box, and the fusion bonding component 8 may be a baking component, an ultrasonic welding component or an infrared welding component, and the like.

To sum up, the present invention provides a thermoplastic honeycomb core material that can be continuously extruded and roll-formed, and specifically relates to a sandwich body suitable for thermoplastic sandwich composite materials, which solves the problems of high manufacturing cost and high cost of traditional honeycomb core materials. The problems of material waste, non-addition of functional fillers and reinforcing fillers have realized the advantages of honeycomb core filling, low cost and economical manufacturing, effectively expanding the application field of thermoplastic composite materials.

Among them, the thermoplastic core material of the present invention is formed into a certain structure by rolling the continuous extruded sheet, the orientation of the honeycomb body is completed through the guide device, and the product bonding is completed through the hot drying tunnel, thereby forming the honeycomb body structure. The process is continuous production, the production equipment is common, the production continuity is good, the assembly line operation can be realized, the honeycomb body can be produced in an integrated way, the production efficiency is high, it can be used in large-scale production, there is no material waste in the production process, and the production cost is low. The structure of the thermoplastic core material is formed by rolling, which can realize the filling of functional fillers and reinforcing fillers. After compounding with fiber-reinforced thermoplastic composite panels, it solves the functional requirements that cannot be met by the existing round tube honeycomb and semi-closed folded honeycomb. And areas with demanding structural strength requirements. Therefore, as mentioned above, the thermoplastic core material with a larger wall thickness and filler material of the present invention can be well applied in various fields that require high light weight and high strength, such as various types of vehicles with increasingly heavy loads. Vehicles, especially heavy-duty electric coal trains, or electric logistics vehicles that need to reduce the body due to insufficient battery life.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (22)

1. Production method of thermoplastic core material, including: Continuously output flat sheets (10) along the output direction (X) of the assembly line; cutting the sheet (10) along the output direction (X) of the assembly line and dividing it into a plurality of sheet unit belts (20) of equal width along the output direction (Y) of the broadside of the sheet (10); Each of the sheet unit belts (20) is guided to turn over and arranged to be arranged at intervals along the broadside output direction (Y); Processing each of the sheet unit belts (20) into corresponding sheet material units (30), wherein at least part of the sheet surface of the sheet material unit belt (20) is correspondingly processed along the output direction of the assembly line (X) Repeatedly presented non-closed geometric shapes (104); The sheet unit (30) is gathered and laminated and spliced into a unit assembly (100) along the broadside output direction (Y). 2. The production method of thermoplastic core material according to claim 1, wherein, guiding and turning each of the sheet unit belts (20) and arranging them to be sequentially spaced along the broadside output direction (Y) comprises: The sheet unit belt (20) after being guided and reversed is extended along the output direction (X) of the assembly line, and the sheet surface of the sheet unit belt (20) and the sheet surface of the sheet (10) form a Plane angle (a'). 3. The production method of thermoplastic core material according to claim 2, wherein, the plane sandwich between the sheet surface of the sheet unit belt (20) and the sheet surface of the sheet (10) The angle (a') is 20° to 160°. 4. The production method of thermoplastic core material according to claim 2, wherein, the sheet unit belt (20) after being guided and reversed is perpendicular to the sheet (10), and each of the sheet unit belts (20) It is formed to be distributed in the shape of a grid plate facing the plate along the output direction (Y) of the broad side. 5. The production method of thermoplastic core material according to claim 4, wherein, processing each of the sheet unit bands (20) into corresponding sheet units (30) comprises: The sheet unit belt (20) is kept perpendicular to the sheet (10), and the sheet surface of the sheet unit belt (20) is processed into a raised shape along the broadside output direction (Y). The geometric protruding part is formed in the geometric protruding part and axially penetrates along the vertical direction of the sheet material surface of the sheet material (10) and is formed on the sheet material surface of the sheet material unit belt (20). A closed geometric inner hole (105), thereby processing the geometric body (104). 6. The production method of thermoplastic core material according to claim 1, wherein, the output processing method of the sheet (10) is extrusion, calendering, casting or rolling processing, and/or, the geometric shape The processing method of the body (104) is roller die extrusion, plate die extrusion or chain die extrusion. 7. The production method of thermoplastic core material according to claim 1, wherein, gathering and stacking and splicing the sheet unit (30) into a unit assembly (100) along the broadside output direction (W) comprises: Gathering each of the sheet material units (30) along the broadside output direction (Y); The contact parts between any adjacent sheet material units (30) are melted and bonded to form the unit assembly (100) by lamination and splicing. 8. The production method of thermoplastic core material according to claim 7, wherein, the fusion bonding method between the sheet material units (30) is hot melt splicing, ultrasonic splicing or infrared splicing. 9. The production method of thermoplastic core material according to claim 1, wherein, gathering and stacking and splicing the sheet unit (30) into a unit assembly (100) along the broadside output direction (Y) comprises: applying an adhesive layer on the contact portion of the sheet unit (30); Gathering each of the sheet material units (30) along the broadside output direction (Y) and gluing each other to form the unit assembly (100). 10. The production method of thermoplastic core material according to claim 1, wherein, gathering and stacking and splicing the sheet unit (30) into a unit assembly (100) along the broadside output direction (Y) comprises: Moving and adjusting the sheet unit (30) along the output direction (X) of the assembly line, so that the unit assembly (100) formed by stacking and splicing includes splicing formed by the geometric body (104) and along the A plurality of shaft hole structures arranged in sequence in the pipeline output direction (X), the shaft hole structure comprising an axial through hole (101) and a circumferentially closed shaft hole peripheral wall surrounding the axial through hole (101). 11. The production method of thermoplastic core material according to claim 1, wherein, when the flat sheet (10) is continuously output along the output direction (X) of the assembly line, the thickness of the continuously extruded sheet (10) Not less than 0.1mm. 12. The production method of thermoplastic core material according to claim 11, wherein, the unit assembly (100) includes a plurality of axial hole structures formed by splicing the geometric bodies (104), the axial holes The structure includes an axial through hole (101) and a circumferentially closed axial hole peripheral wall surrounding the axial through hole (101), and the diameter of a circumscribed circle of the axial through hole (101) of any shape is not less than 1mm. 13. The production method of thermoplastic core material according to claim 11, wherein, the unit assembly (100) includes a plurality of shaft hole structures formed by splicing the geometric bodies (104), and the shaft holes The structure includes an axial through hole (101) and a circumferentially closed axial hole peripheral wall surrounding the axial through hole (101), and the axial length of the axial through hole (101) of any shape passes through the axial The diameter ratio of the circumcircle of the hole (101) is not greater than 200. 14. The production method of the thermoplastic core material according to any one of claims 1 to 13, wherein the production method further comprises: When the vertical direction of the sheet surface of the sheet (10) is the direction of bearing the compressive load, the material volume utilization rate of the unit assembly (100) is not lower than 60%, preferably, the material volume utilization rate is not less than 60%. less than 80%; And/or, so that on the core cross-section of the unit assembly (100) parallel to the sheet surface of the sheet (10), the plane porosity is not lower than 40%, further, the plane The porosity is not less than 60%. 15. Production equipment for thermoplastic core materials, including: Thermoplastic material molding equipment (1), used for continuously outputting flat sheets (10) along the output direction (X) of the assembly line; A cutting component (4), cutting the sheet (10) along the output direction (X) of the assembly line and dividing it into a plurality of sheets of equal width along the output direction (Y) of the broad side of the sheet (10) unit belt (20); A guiding and positioning component (5), used for guiding and turning over each of the sheet unit belts (20) and arranging them at intervals along the broadside output direction (Y); A geometrical body forming component (2), configured to form, on at least part of the sheet unit belt (20), non-closed geometrical bodies (104) that are repeatedly presented along the assembly line output direction (X), to A corresponding sheet unit (30) is formed. 16. The production equipment of thermoplastic core material according to claim 15, wherein said production equipment comprises: The fusion bonding assembly (8) is used for heating the sheet units (30) arranged at intervals along the broadside output direction (Y) so as to be capable of fusion bonding into a unit assembly (100). 17. The production equipment of thermoplastic core material according to claim 16, wherein said production equipment comprises: A gathering component (7), used for gathering each of the sheet units (30) along the broadside output direction (Y). 18. The thermoplastic core material production equipment according to claim 16, wherein the thermoplastic material molding equipment (1), the cutting assembly (4), the guiding and positioning assembly (5), the geometric The body forming component (2) and the fusion bonding component (8) are arranged in sequence along the output direction (X) of the assembly line. 19. The production equipment of thermoplastic core material according to claim 16, wherein, the guide positioning component (5) is a guide roller or a guide box, and/or, the fusion bonding component (8) is a baking Components, Ultrasonic Welded Components or Infrared Welded Components. 20. The production equipment of thermoplastic core material according to claim 15, wherein said production equipment comprises: a glue gun (3) for applying a bonding layer on the contact portion of said sheet unit (30); and The gathering component (7) is used for gathering the sheet material units (30) coated with the adhesive layer along the broadside output direction (Y) to form a unit assembly (100) by glueing each other. 21. The thermoplastic core material production equipment according to claim 20, wherein the thermoplastic material molding equipment (1), the cutting assembly (4), the guiding and positioning assembly (5), the geometric The shape forming component (2), the glue gun (3) and the gathering component (7) are arranged in sequence along the output direction (X) of the assembly line. 22. The production equipment of thermoplastic core material according to claim 15, wherein, the geometric shape forming assembly (2) is a pressing roller assembly arranged between adjacent sheet material unit belts (20), The rotation axis of the pressure roller assembly is perpendicular to the sheet surface of the sheet (10) and the peripheral wall of the roller body is formed with protruding edge crimping portions spaced along the circumferential direction.