CN113290825A

CN113290825A - Orientation control element and forming device

Info

Publication number: CN113290825A
Application number: CN202110655146.XA
Authority: CN
Inventors: 葛翔; 李峰; 周步存
Original assignee: Changzhou Fuxi Technology Co Ltd
Current assignee: Changzhou Fuxi Technology Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-08-24

Abstract

The invention relates to an orientation control element provided with a stretching section which orients a material in a longitudinal direction, said stretching section comprising, from upstream to downstream in the direction of advance of said material: a transverse stretch zone, a transverse to longitudinal transition zone, and a longitudinal stretch zone.

Description

Orientation control element and forming device

Technical Field

The present invention relates to an orientation control member for aligning materials (for example, anisotropic heat conductive filler) and a molding apparatus provided with the same.

Background

In general, the anisotropic filler is aligned in a specific direction to optimize the reinforcing effect in the aligned direction, and for example, the anisotropic thermal conductive material is aligned in a vertical direction to enhance the thermal conductivity in the vertical direction.

Anisotropic materials tend to align naturally along the direction of fluid flow, an effect which has been widely reported and utilized by many researchers. The devices for controlling the orientation of the anisotropic filler are mainly extrusion equipment, injection molding equipment, and molding equipment. In the material obtained by these methods, the anisotropic fillers are aligned in the planar direction, and are difficult to align in the perpendicular direction. Therefore, it is often necessary to obtain a sheet (or a column) arranged in, for example, the X (or Y) direction, laminate and mold a plurality of such sheets into a block, and then cut in the Z direction before finally obtaining a product arranged in the perpendicular direction (Z direction).

It can be seen that when using the existing orientation control elements, at least a number of steps of extrusion, lamination, molding, cutting, etc. are required, with a low degree of continuity. And is limited by the operating size of the lamination and the size of the molding die, the size of the block to be produced is limited, and the size of the material after cutting is greatly limited. In addition, the cutting precision is limited, the thickness uniformity of the cut product is difficult to ensure, and the surface roughness is greatly increased.

The statements in the background section are merely prior art as they are known to the inventors and do not, of course, represent prior art in the field.

Disclosure of Invention

To solve one or more of the problems in the prior art, an orientation control element is provided, so that flaky materials (such as anisotropic fillers) can be easily oriented longitudinally, process steps can be reduced, the continuous production degree is improved, and the product performance stability is improved.

According to one aspect of the present invention, there is provided an orientation control element provided with a stretching portion that orients a material in a longitudinal direction, characterized in that, in an advancing direction of the material, the stretching portion comprises, from upstream to downstream: a transverse stretching zone formed as a cavity with an inner diameter gradually decreasing along the advancing direction of the material; a transverse-longitudinal transition zone contiguous with the transverse stretching zone and formed as a cavity of substantially constant internal diameter dimension; and a longitudinal stretching area which is adjacent to the transverse and longitudinal transition area and is formed into a cavity with the inner diameter gradually increasing along the material advancing direction.

In the above orientation control member, the stretching portion further includes an orientation stabilizing zone located downstream of the longitudinal stretching zone, the orientation stabilizing zone being formed as a cavity having a substantially constant inner diameter dimension.

In the above orientation control member, the material is in the form of flakes, preferably anisotropic fillers, preferably one-dimensional materials such as carbon fibers, glass fibers, ceramic fibers, metal fibers, and the like.

In the above orientation control member, the cross section of the transverse stretching region near the inlet of the stretching portion is one of circular, rectangular, rhombic, elliptical, triangular, trapezoidal, polygonal, or circular, preferably circular, square, or circular; the cross-section of the transverse stretching region adjacent to the transverse-longitudinal transition region is substantially rectangular.

In the above orientation controlling member, the height of the maximum inner diameter of the cavity of the transverse stretching region is 10 to 200mm, preferably 20 to 100 mm; the height of the minimum inner diameter is 0.1-5mm, preferably 0.5-3mm, and most preferably 1-2mm, and preferably the stroke of the transverse stretching zone is 10-500mm, more preferably 15-100mm, and most preferably 20-60 mm. .

In the above orientation control member, the cross section of the cavity of the longitudinal-transverse transition zone is substantially rectangular, preferably the cross section shape and size of the cavity are consistent with the cross section shape and size of the transverse stretching zone adjacent to the cavity, and the height of the inner diameter is preferably 0.1-5mm, more preferably 0.5-3mm, and most preferably 1-2 mm; preferably, the stroke of the transverse and longitudinal transition area is 1-20mm, more preferably 5-10 mm.

In the above orientation control member, the cross-sectional size and shape of the inlet of the longitudinal stretching zone is consistent with the cross-sectional size and shape of the outlet of the transverse-longitudinal transition zone, and is preferably rectangular, annular or trapezoidal; the height of the inner diameter at the inlet of the longitudinal stretching zone is 0.1-5mm, more preferably 0.5-3mm, and most preferably 1-2mm, the height of the inner diameter at the outlet of the longitudinal stretching zone is 0.12-12.5mm, more preferably 0.6-6mm, and most preferably 1.5-4mm, and preferably, the ratio of the height of the inner diameter at the outlet to the height of the inner diameter at the inlet of the longitudinal stretching zone is 1.2-2.5:1, preferably 1.5 to 2.0: 1, preferably, the longitudinal stretch zone has a stroke of 1 to 20mm, preferably 2 to 5 mm.

In the above orientation control member, the cross-sectional shape and size of the orientation stabilizing zone are in conformity with those at the outlet of the longitudinal stretching zone, and are preferably rectangular; preferably, the height of the inner diameter of the cavity of the orientation stabilizing zone is consistent with that of the inner diameter of the outlet of the longitudinal stretching zone, and the height of the cavity is 0.12-12.5mm, more preferably 0.6-6mm, and most preferably 1.5-4 mm; preferably, the stroke of the orientation stabilization zone is 1 to 10mm, preferably 2 to 5 mm.

In the above orientation control element, the transverse stretching region, the transverse-longitudinal transition region, the longitudinal stretching region and/or the orientation stabilizing region are of a separate structure or an integrally formed structure, or at least two of them are of an integrally formed structure.

According to another aspect of the present invention, there is provided a molding apparatus including the above-described orientation control element.

The molding device further includes a feeding section and an extruding section.

The molding apparatus further includes an injection molding apparatus or a molding apparatus.

According to another aspect of the present invention, there is provided a heat conductive gasket, which is produced by the above molding apparatus, and in which the heat conductive filler is oriented in a thickness direction of the heat conductive gasket.

The invention has the beneficial effects that:

according to the orientation control element disclosed by the invention, flaky materials (such as anisotropic fillers) can be easily longitudinally oriented, process steps such as lamination, die pressing, cutting and the like can be reduced, the product performance stability is improved (for example, the phenomena of layering and splitting caused by lamination are avoided), and meanwhile, the phenomena of uneven product thickness and rough surface caused by cutting are avoided. In addition, the continuous production degree is promoted, products with the width reaching more than meter level, unlimited length and controllable thickness can be prepared, and the preparation of coiled material products with the lamellar fillers arranged along the longitudinal direction can be realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a six-sided view and a perspective view of an orientation control element of the present invention.

Fig. 2A is a sectional view taken along line a-a of fig. 1.

Fig. 2B is a sectional view taken along line B-B of fig. 1.

Fig. 2C is an enlarged schematic view of a portion shown by a circle in fig. 2B.

Fig. 3 is a schematic sectional perspective view taken along line a-a of fig. 1 for explaining the principle of controlling/adjusting the orientation of the materials.

Fig. 4 is a perspective view of the material M.

Fig. 5(a) is a schematic perspective view of a molding apparatus according to an embodiment of the present invention.

Fig. 5(B) is a schematic view of the removal of the orientation control member from the molding apparatus.

Fig. 6 is a six-sided view of a molding apparatus of one embodiment of the present invention.

Fig. 7 is a perspective view of an extrusion part of the molding apparatus.

Fig. 8 is a perspective view of the feeding section of the molding apparatus.

Fig. 9 is a schematic perspective view of a molding apparatus according to another embodiment of the present invention.

Fig. 10(a) is a schematic perspective view of a molding apparatus according to another embodiment of the present invention.

Fig. 10(B) is a perspective view of an orientation control member of a molding apparatus according to another embodiment of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and understanding of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In addition, "upstream" and "downstream" in the present invention refer to upstream or downstream in the direction of advance of a fluid or material.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Fig. 1 to 3 are schematic views of an orientation control element 1 according to a first embodiment of the present invention. Fig. 1 is a six-sided view and a perspective view of an orientation control member 1. Fig. 2A is a sectional view taken along line a-a of fig. 1. Fig. 2B is a sectional view taken along line B-B of fig. 1. Fig. 2C is an enlarged schematic view of a portion shown by a circle in fig. 2B. Fig. 3 is a schematic sectional perspective view taken along line a-a of fig. 1 for explaining the principle of controlling/adjusting the orientation of the materials. Fig. 4 is a perspective view of the material M.

As shown in fig. 4, the material M is a substantially rectangular parallelepiped sheet having six planes: 2 XY planes, 2 YZ planes, and 2 XZ planes. In this embodiment, the length of the material M in the X direction is the largest, the length in the Z direction is the next, and the length in the Y direction is very small (i.e., very thin). As an example of the material M, there may be anisotropic fillers such as one-dimensional carbon fibers, glass fibers, ceramic fibers, metal fibers, and the like, which are used for preparing the heat conductive gasket.

Since the thickness of the material M in the Y direction is very small (thin), the natural state of the material M is a flat state (i.e., a state in which the XZ plane is the bottom surface, which is also called "transverse orientation" or "transverse alignment"), while a standing state (i.e., a state in which the YZ plane or the XY plane is the bottom surface, which is also called "longitudinal orientation" or "longitudinal alignment" or "orientation in the vertical direction") is difficult to achieve, particularly, the longitudinal orientation when the YZ plane is the bottom surface is the most difficult to achieve. In practical applications such as the preparation of a heat conduction gasket, it is often necessary to orient the material M in the longitudinal direction (thickness direction of the heat conduction gasket) of the heat conduction gasket so as to achieve excellent heat conduction and dissipation performance in the longitudinal direction.

It should be noted that XYZ coordinate axes and planes based thereon are shown in fig. 4, and those skilled in the art should understand that the definitions of these coordinate axes and planes are for convenience of description and for convenience of understanding and implementing the present invention, and are not intended to limit the present invention.

As shown in fig. 1 to 3, the orientation control element 1 according to the present invention includes a stretching portion 10, and the stretching portion 10 orients a material M in a fluid in a vertical direction. The stretching section 10 has a fluid inlet 10a and a fluid outlet 10b and comprises, from upstream to downstream in the direction of advance of the material M (or fluid): a transverse stretch zone 101, a transverse-longitudinal transition zone 102, a longitudinal stretch zone 103, and an orientation stabilization zone 104.

As shown in fig. 2, the transverse stretching region 101 is formed as a cavity having an inner diameter gradually narrowing in a direction from the inlet 10a to the outlet 10b (i.e., the inner diameter of the cavity gradually becomes smaller in the material advancing direction) for transversely orienting the randomly arranged material M flowing through the transverse stretching region 101. As shown in fig. 3, during the process of the viscous fluid passing through the transverse stretching region 101, the originally disordered material M in the fluid gradually changes to a natural state during the process of fluid flowing, and takes on an ordered transverse arrangement (i.e., the state that the XZ plane of the material M is the bottom surface and the XZ plane is attached to the surface of the transverse stretching region 101).

The cross-sectional shape of the cavity of the transverse stretching zone 101 near the inlet 10a is substantially square, and the cross-section of the cavity at a position adjacent to a transverse-longitudinal transition zone 102 (which will also be referred to as an outlet of the transverse stretching zone 101) described later is substantially rectangular, and the height of the rectangle (i.e., the length of the inner diameter perpendicular to the material advancing direction) is 2 mm. In addition, the stroke or length L1 (see FIG. 2) of transverse stretch zone 101 is 60 mm.

As shown in fig. 2 and 3, after passing through the cross stretch zone 101, the fluid enters the cross-machine transition zone 102. The longitudinal-transverse transition region 102 is formed as a substantially flat cavity. The cross-section of the chamber is substantially rectangular, that is, substantially conforming to the cross-sectional shape and dimensions of the adjacent lateral stretching region 101 to ensure smooth flow of fluid. The height of the inner diameter of the cross section of the chamber (i.e. the length of the inner diameter perpendicular to the direction of advance of the material) was 2 mm. In the present invention, unless otherwise specified, the height of the inner diameter of the cavity means the length of the inner diameter in the direction perpendicular to the material advancing direction.

In addition, the stroke or length L2 (see fig. 2) of the longitudinal-transverse transition region 102 is 5 mm. As shown in fig. 3, during the fluid flow through the transverse-longitudinal transition region 102, the material, such as anisotropic filler, is aligned in the transverse direction and is sufficiently ready for the longitudinal transition region to achieve longitudinal alignment of the filler.

As shown in fig. 2 and 3, the fluid flows through the longitudinal-transverse transition zone 102 and then into the longitudinal stretching zone 103.

The longitudinal stretching zone 103 is formed as a cavity with an inner diameter gradually increasing along the material advancing direction. The size and shape of the cross section of the cavity of the longitudinal stretching region 103 adjacent to the aforementioned transversal-longitudinal transition region 102 is identical to the size and shape of the cross section of the transversal-longitudinal transition region 102. In other words, the cross-sectional shape and the inner diameter dimension at the inlet of the longitudinal stretching section 103 substantially coincide with the cross-sectional shape and the dimension of the inner diameter at the outlet of the longitudinal-transverse transition section 102 to ensure smooth flow of fluid, and thus are rectangular in this embodiment.

The ratio of the minimum height to the maximum height of the inner diameter of the longitudinal stretching zone 103 is 1.2 to 2.5, preferably 1.5 to 2.0: 1. in other words, the ratio of the height of the inner diameter at the most downstream (or outlet) of the longitudinal stretching zone 103 to the height of the inner diameter at the most upstream (or inlet) is 1.2-2.5:1, preferably 1.5-2.0: 1.

in this embodiment, the longitudinal stretch zone 103 has a maximum inner diameter height of 5mm and a minimum inner diameter height of 2 mm. The stroke or length L3 (see fig. 2) of longitudinal stretch zone 103 is 5 mm.

As shown in fig. 3, during the passage through the longitudinal stretching zone 103, the viscous fluid may be stretched in the longitudinal direction due to the sudden increase in longitudinal dimension, and the material or filler M may gradually become longitudinally aligned with the viscous fluid. More specifically, in the present embodiment, the materials M are arranged in a longitudinal direction with the XY plane as the bottom surface, that is, in a direction oriented along the Z direction.

As shown in fig. 2 and 3, the fluid enters the orientation stabilization zone 104 after passing through the longitudinal stretch zone 103. The orientation stabilization zone 104 is a cavity having a substantially constant inner diameter. The cross-sectional shape and size of the cavity of the orientation stabilization zone 104 is consistent with that of the adjoining longitudinal stretching zone 103. Therefore, the cross-sectional shape of the cavity of the orientation stabilization zone 103 in this embodiment is substantially rectangular, the inner diameter dimension of the cavity substantially coincides with the inner diameter dimension of the cavity of the stretching zone 103 at the adjacent position, and the inner diameter height is 5 mm.

In addition, in order to more secure the effect of the longitudinal orientation, the stroke or length L4 (see fig. 2) of the orientation stabilizing zone was 5 mm.

According to the orientation control element 1, the oriented arrangement (specifically, longitudinal arrangement) of the materials M in the fluid can be realized, samples (such as heat conducting gaskets) of the materials (such as anisotropic fillers) oriented along the vertical direction (longitudinal direction) can be directly prepared, the process steps are reduced, the phenomena of layering, splitting, uneven thickness, rough surface and the like are avoided, the continuous production degree is improved, the product performance stability and the mechanical performance are improved, and the preparation of coiled products of the anisotropic materials arranged along the longitudinal direction can be realized.

In the above-described orientation control element 1, the transverse stretching region 101, the transverse-longitudinal transition region 102, the longitudinal stretching region 103, and the orientation stabilizing region 104 are formed as a continuous through-going integral structure. However, the components may be separately constructed (or partially constructed integrally and partially constructed separately) and then assembled into a continuous through-structure. For example, the transverse stretching region 101 is formed integrally with the transverse-longitudinal transition region 102, while the longitudinal stretching region 103 and the orientation stabilizing region 104 are separate structures.

In addition, the orientation stabilizing zone 104 may also be omitted. In this case, the stroke of the longitudinal stretching region 103 may be appropriately extended as long as it can ensure that the material M in the fluid can be stably longitudinally oriented.

In the above-described orientation controlling member 1, the cross section of the inlet of the transverse stretching region 101 is substantially square. But may also be circular, rectangular, diamond-shaped, oval, triangular, trapezoidal, polygonal, or annular (racetrack shape). Among them, a circular shape, a square shape, and a ring shape (racetrack shape) are preferable.

The size, shape, etc. of each region/cavity are not limited to those of the above embodiments, and may be adjusted according to specific needs.

Preferably, the height of the cavity of the transverse stretching region 101 at which the inner diameter is largest is 10 to 200mm, preferably 20 to 100 mm; the height of the smallest inner diameter is 0.1-5mm, preferably 0.5-3mm, most preferably 1-2mm, and preferably the stroke L1 of the transverse stretching zone 101 is 10-500mm, more preferably 15-100mm, most preferably 20-60 mm.

In addition, the stroke L2 of the longitudinal-transverse transition region 102 is preferably 1-20mm, more preferably 5-10 mm.

Preferably, the outlet cross-sectional shape of the longitudinal stretching region 103 is at least one of a rectangle, a loop (racetrack shape), and a trapezoid, preferably a rectangle.

Preferably, the stroke L3 of longitudinal stretch zone 103 is 1-20mm, preferably 2-5 mm. The stroke L4 of the orientation stabilization zone is preferably 1 to 10mm, preferably 2 to 5 mm.

When the viscous fluid containing the material M (e.g., graphene nanoplatelets, which are flake-like anisotropic heat conductive fillers) sequentially flows through the transverse stretching region, the transverse-longitudinal transition region, the longitudinal stretching region (and the orientation stabilizing region in the case of having the orientation stabilizing region) of the orientation control element, the randomly arranged material M will first turn into transverse orientation and then gradually become longitudinal orientation until almost all of the longitudinal orientation, thereby enabling the material M to be in a highly longitudinally oriented state in the sheet (e.g., heat conductive pad) finally coming out of the longitudinal stretching region or the orientation stabilizing region, and thus, the sheet is excellent in performance (e.g., heat conductivity) in the longitudinal direction.

If desired, the orientation control element 1 of the present invention may be assembled with other devices/components to form a molding device to further simplify the process steps and facilitate the direct preparation of longitudinally highly oriented samples (e.g., thermal pads) of materials (e.g., anisotropic fillers). As an example, the present invention provides a molding apparatus 100 including the above-described orientation control member 1, the extrusion section 20, and the feeding section 30. Fig. 5(a) is a perspective view of the molding apparatus 100 of the present invention. Fig. 5(B) is a schematic view of the removal of the orientation control member 1 from the molding apparatus 100. Fig. 6 is a six-sided view of the molding apparatus 100. Fig. 7 is a perspective view of the extruding part 20. Fig. 8 is a perspective view of the feeding portion 30.

As shown in fig. 5(B), the orientation control member 1 (stretching portion 10) may be detachably connected to the extruding portion 20 using a fastening member 401 such as an O-ring, a flange seal, or the like.

The shape and the inner cavity of the extruding part 20 are cylindrical. Of course, other shapes such as rectangular parallelepiped, etc. are also possible. The diameter or side length of the cross section of the inner cavity and the length are not particularly limited. The extrusion mode can be single screw extrusion, double screw extrusion, three screw extrusion or no screw extrusion.

The feeding section 30 may employ a feeding device commonly used in the art. The feeding mode can be piston feeding, double-wrist feeding or double-cone feeding. The sizes and dimensions of the feed portion 30 and the feed port 301 are not particularly limited and may be appropriately selected as needed.

In the exemplary molding apparatus 100, the feeding portion 30, the extruding portion 20, and the orientation controlling member 1 are separately formed and then sequentially connected in the material advancing direction to be assembled as a single body. However, the present invention is not limited to this, and two of the components may be integrally formed and then assembled with the other component to form a final molding apparatus, or the feeding unit 30, the extruding unit 20, and the orientation controlling member 1 may be integrally formed to form a final molding apparatus.

In the molding apparatus 300 (fig. 9) of an embodiment, the main differences from the molding apparatus 200 are: the feeding part 30 is formed as an integral structure with the extruding part 20, and the feeding part 30 is formed at one side of one end of the extruding part 20.

In a molding apparatus 400 of another embodiment (as shown in fig. 10, in which fig. 10(a) is a schematic perspective view of the molding apparatus of this embodiment and fig. 10(B) is a schematic perspective view of an orientation control element of the molding apparatus of this embodiment), the main difference from the molding apparatus 200 is that: the feeding part 30, the extruding part 20 and the orientation controlling member 1 are integrally formed, and the feeding part 30 is formed inside one end part of the extruding part 20, so that the profile of the molding apparatus 400 is more simplified, and complicated assembling steps are saved.

The above describes an example of connecting an orientation control member to an extrusion apparatus to form a molding device of the present invention. Without being limited thereto, the orientation control member of the present invention may be connected to an injection molding device, an embossing device, or the like to form the molding apparatus of the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An orientation control element, comprising a stretching portion for orienting a material in a longitudinal direction, characterized in that, in the advancing direction of the material, the stretching portion from upstream to downstream comprises:

a transverse stretching zone, which is formed as a cavity with a gradually decreasing inner diameter along the advancing direction of the material;

a transverse-longitudinal transition region adjoining the transverse stretching region and formed as a cavity having a substantially constant inner diameter dimension; and

The longitudinal stretching zone is adjacent to the transverse and longitudinal transition zone, and is formed as a cavity with an inner diameter gradually increasing along the advancing direction of the material.

2 . The orientation control element according to claim 1 , wherein the stretching portion further comprises an orientation stabilization zone located downstream of the longitudinal stretching zone, the orientation stabilization zone being formed as a cavity with a substantially constant inner diameter. 3 . .

3. The orientation control element according to claim 1 or 2, characterized in that, the material is flake-like, preferably an anisotropic filler, and the anisotropic filler is preferably a one-dimensional material, such as carbon fiber, glass fiber , ceramic fiber, metal fiber.

4. The orientation control element according to any one of the preceding claims, characterized in that the cross-section of the transverse stretching zone in the vicinity of the inlet of the stretching portion is circular, rectangular, rhombic, oval, triangular , trapezoidal, polygonal, or annular, preferably circular, square, or annular; the cross-section of the transverse stretching region adjacent to the transverse-longitudinal transition region is substantially rectangular.

5. The orientation control element according to any one of the preceding claims, characterized in that, the height at the maximum inner diameter of the cavity of the transverse stretching zone is 10-200 mm, preferably 20-100 mm; The height is 0.1-5mm, more preferably 0.5-3mm, and most preferably 1-2mm, and preferably, the stroke of the transverse stretching zone is 10-500mm, more preferably 15-100mm, and most preferably 20-60mm.

6. The orientation control element according to any one of the preceding claims, characterized in that the cross-section of the cavity of the transverse-longitudinal transition region is substantially rectangular, and preferably the cross-sectional shape and size of the cavity are similar to those of the cavity adjacent to it. The cross-sectional shape and size of the transverse stretching zone are consistent, and the inner diameter and height are preferably 0.1-5mm, more preferably 0.5-3mm, and most preferably 1-2mm; preferably, the stroke of the transverse and longitudinal transition zone is 1-20mm , more preferably 5-10mm.

7. The orientation control element according to any one of the preceding claims, characterized in that the cross-sectional size and shape of the inlet of the longitudinal stretching zone corresponds to the cross-sectional size and shape of the outlet of the transverse-longitudinal transition zone, preferably It is rectangular, annular or trapezoidal; the height of the inner diameter at the entrance of the longitudinal stretching zone is 0.1-5mm, more preferably 0.5-3mm, and most preferably 1-2mm, and the height of the inner diameter at the outlet of the longitudinal stretching zone 0.12-12.5mm, more preferably 0.6-6mm, and most preferably 1.5-4mm, preferably, the ratio of the height of the inner diameter at the exit of the longitudinal stretching zone to the height of the inner diameter at the entrance is 1.2-2.5:1, preferably It is 1.5-2.0:1, preferably, the stroke of the longitudinal stretching zone is 1-20mm, preferably 2-5mm.

8. The orientation control element according to any one of the preceding claims, characterized in that the cross-sectional shape and size of the orientation stabilization zone are consistent with the cross-sectional shape and size at the outlet of the longitudinal stretching zone, preferably a rectangle ; Preferably, the height of the inner diameter of the cavity of the orientation stabilization zone is consistent with the height of the inner diameter of the outlet of the longitudinal stretching zone, and its height is 0.12-12.5mm, more preferably 0.6-6mm, and most preferably 1.5-4mm; Preferably, the stroke of the orientation stabilization zone is 1-10 mm, preferably 2-5 mm.

9. The orientation control element according to any one of the preceding claims, characterized in that the transverse stretching zone, the transverse and longitudinal transition zone, the longitudinal stretching zone and/or the orientation stabilization zone are of a separate structure or an integrally formed structure , or at least both of them are integrally formed structures.

10. A molding apparatus comprising the orientation control element according to any one of the preceding claims.

11. The molding apparatus according to claim 10, further comprising a feeding part and an extruding part.

12. The molding apparatus according to claim 10, further comprising an injection molding apparatus or a molding apparatus.

13 . The thermally conductive gasket prepared by the molding device according to claim 1 , wherein, in the thermally conductive gasket, the thermally conductive filler is oriented along the thickness direction of the thermally conductive gasket. 14 .