Antenna reflector forming and assembling die and antenna reflector forming and assembling method

Abstract

The invention provides an antenna reflector forming and assembling mold and an antenna reflector forming and assembling method. The mold comprises a forming mold, a surrounding strip, a positioning lug, a lug positioning pin and a back rib positioning plate. A molded surface extension area and a horizontal extension area are arranged on the front surface of the forming die; the lug positioning pins comprise a long lug positioning pin and a short lug positioning pin; and the lug piece positioning pin is used for connecting the positioning lug piece and the molded surface extension area through the first lug piece positioning hole and the second lug piece positioning hole. The mold with the structural form can be used for forming an inner skin of the reflector, can also be used for forming a honeycomb sandwich structure of the reflector, and can also be used for gluing back ribs of the reflector, so that one set of mold can meet the use requirements of the reflector in different forming and gluing assembly states. The mold has the advantages of simple structure, low design difficulty and the like, and can be used for multiple purposes. The positioning reference of the molded surface of the reflector is unified in the states of inner skin molding, honeycomb interlayer molding, back rib gluing and the like, and the molded surface of the antenna reflector has higher precision and more stable quality.

Description

Technical Field

[0001] The invention relates to the field of composite reflector forming and assembling dies, in particular to an antenna reflector forming and assembling die and an antenna reflector forming and assembling method, and in particular to a high-precision antenna reflector forming and assembling die. Background Art

[0002] With the continuous progress and development of satellite communications, the caliber requirements of various antenna reflectors are getting larger and larger, and the surface accuracy requirements are getting higher and higher. Traditional metal antenna reflectors can no longer meet the current high-precision requirements. Carbon fiber composite skin aluminum honeycomb sandwich structure antenna reflectors have the advantages of light weight, high strength, and high resistance to thermal deformation. This type of antenna reflector has become the main antenna reflector structure.

[0003] At present, the manufacturing of high-precision carbon fiber skin aluminum honeycomb sandwich structure antenna reflectors mainly relies on high-precision molding and assembly tooling. Traditional antenna reflector molding and gluing requires the design of multiple molds such as skin molding molds, sandwich structure gluing molds, and back reinforcement gluing assembly molds, which results in high mold costs.

[0004] Therefore, how to design a mold with strong versatility that can be used in skin forming, sandwich structure bonding, back reinforcement bonding and other assembly processes is a problem that needs to be solved urgently. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide an antenna reflector forming and assembling die and an antenna reflector forming and assembling method.

[0006] According to the present invention, an antenna reflector forming and assembly mold includes a forming mold, a surrounding strip, a positioning ear piece, an ear piece positioning pin, and a back rib positioning plate;

[0007] The front side of the forming die is provided with a profile extension area along the generatrix direction of the reflector profile and a horizontal extension area parallel to the reflector placement plane;

[0008] The positioning ear piece is a step structure, the lower surface is detachably connected to the profile extension area, and the positioning ear piece is provided with a first ear piece positioning hole, and the first ear piece positioning hole includes a first circular positioning hole and a waist-shaped positioning hole;

[0009] There are multiple positioning ears; the multiple positioning ears are arranged opposite to each other in pairs, and the waist-shaped directions of the waist-shaped holes of the oppositely arranged positioning ears are collinear;

[0010] The reflector back rib positioning plate is installed in the horizontal extension area

[0011] The surround strip is installed on the profile extension area, and there is a profile compensation area of ​​the first size between the inner side of the surround strip and the reflector shape. The surround strip is a discontinuous structure, and there is a second size gap on one side at the positioning ear piece;

[0012] A second ear piece positioning hole is provided on the profile extension area, and the second ear piece positioning hole is a second circular positioning hole, and the second circular positioning hole can match the first circular positioning hole and / or waist-shaped positioning hole on the positioning ear piece.

[0013] The ear piece positioning pins include a long ear piece positioning pin and a short ear piece positioning pin; the ear piece positioning pins are used to connect the positioning ear piece and the profile extension area through the first ear piece positioning hole and the second ear piece positioning hole.

[0014] Preferably, the forming die is made of carbon structural steel.

[0015] Preferably, according to the difference between the expansion coefficient of the reflector skin and the expansion coefficient of the forming mold, the forming mold sets the mold thermal compensation coefficient, and the scaling origin of the forming mold is set at the lowest point of the molding surface corresponding to the reflector placement plane;

[0016] The center axis of the relatively arranged positioning ears is the origin of the overmolding die scaling

[0017] Preferably, a plurality of ball head support points are provided on the reverse side of the forming die.

[0018] Preferably, the plurality is three, and the three ball head support points are arranged in a triangle to support the forming mold.

[0019] Preferably, a plane support point is also provided on the reverse side of the molding die, and the ball head support point is 10 mm to 15 mm higher than the plane support point.

[0020] Preferably, a plurality of reference blocks are provided on the horizontal extension area, and each reference block is also provided with a reference hole with a tapered angle.

[0021] Preferably, the number of the reference blocks is 4, which are arranged opposite to each other in pairs, and the side surfaces of two opposite reference blocks are coplanar.

[0022] Preferably, the first size is 10 mm to 15 mm and the second size is 5 mm to 10 mm.

[0023] According to the present invention, a method for forming and assembling an antenna reflector includes the antenna reflector forming and assembling mold, and also includes the following method:

[0024] When in the skin forming state, each tab performs the following operations to position the skin:

[0025] Connecting the first ear piece positioning hole and a second circular positioning hole by using a short ear piece positioning pin;

[0026] Another short ear piece positioning pin is used to connect the waist-shaped positioning hole and another second circular positioning hole, and the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold;

[0027] At this point, the skin is located between the positioning lugs and the forming die;

[0028] When the sandwich structure is in bonding condition, each ear piece performs the following operations to position the sandwich structure:

[0029] A long ear piece positioning pin is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold;

[0030] At this time, the sandwich structure is located between the positioning ear piece and the forming mold;

[0031] When the back reinforcement is in the assembly working state, a short ear piece positioning pin is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold;

[0032] At this time, the sandwich structure is located between the positioning ear piece and the forming mold. After the process is completed, a reflector is formed.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention has a simple structure and low design difficulty. The present invention can meet the use of various different working conditions such as skin molding, sandwich structure bonding, and back reinforcement assembly, and has strong versatility. Specifically, the two second circular positioning holes of the present invention can be selectively connected with the first circular positioning hole and the waist-shaped positioning hole according to different working conditions and needs, and when connected with the waist-shaped positioning hole, they can also be selectively connected with different positions of the waist-shaped positioning hole according to different working conditions and needs; in addition, the connecting parts of the two second circular positioning holes can also be selected from long ear positioning pins and short ear positioning pins according to different working conditions and needs.

[0035] 2. The high-precision reflector forming and assembly mold of the present invention has high structural strength and rigidity, and the placement state is uniform and stable.

[0036] 3. The present invention has a simple structure, low processing difficulty and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0038] Figure 1 It is a schematic diagram of the structure of the present invention.

[0039] Figure 2 for Figure 1 Schematic diagram of the inverted structure.

[0040] Figure 3 for Figure 1 A partial schematic diagram of .

[0041] The figure shows:

[0042]

[0043] DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] The present invention provides an antenna reflector forming and assembly mold, comprising a forming mold 1, a surrounding strip 2, a positioning ear piece 3, an ear piece positioning pin 4, and a back rib positioning plate 5;

[0046] The front side of the molding die 1 is provided with a profile extension area 10 along the generatrix direction of the reflector profile and a horizontal extension area 9 parallel to the reflector placement plane;

[0047] The positioning ear piece 3 is a thin-sheet step structure, and the lower surface is detachably connected to the molding surface extension area 10. When the two are connected, the lower surface coincides with the molding surface of the molding surface extension area 10, and the positioning ear piece 3 is provided with a first ear piece positioning hole, and the first ear piece positioning hole comprises a first circular positioning hole and a waist-shaped positioning hole; the number of the positioning ear pieces 3 is multiple; the multiple positioning ear pieces 3 are arranged opposite to each other in pairs, and the waist-shaped directions of the waist-shaped holes of the relatively arranged positioning ear pieces 3 are collinear; in a preferred example, the molding assembly mold is provided with four positioning ear pieces 3, wherein the waist-shaped directions of the waist-shaped holes of two positioning ear pieces 3 are collinear, and the waist-shaped directions of the waist-shaped holes of the other two positioning ear pieces 3 are collinear, and the waist-shaped directions of the two groups of waist-shaped holes are cross-shaped, and the intersection point passes through the scaling origin of the molding mold 1.

[0048] The reflector back rib positioning plate 5 is installed in the horizontal extension area 9

[0049] The surround 2 is installed on the profile extension area 10, and there is a profile compensation area 11 of a first size between the inner side of the surround 2 and the reflector shape. The surround 2 is a discontinuous structure, and there is a second size gap on one side at the positioning ear piece 3; in a preferred example, the first size is 10mm~15mm and the second size is 5mm~10mm.

[0050] The profile extension area 10 is provided with a second ear piece positioning hole, which is a second circular positioning hole, and the second circular positioning hole can match the first circular positioning hole and / or the waist-shaped positioning hole on the positioning ear piece 3. In a preferred example, the number of the second circular positioning holes is 2, and each second circular positioning hole can match the first circular positioning hole and a waist-shaped positioning hole, but only connects with one of them at a time.

[0051] The ear piece positioning pins 4 include a long ear piece positioning pin and a short ear piece positioning pin; the ear piece positioning pins 4 are used to connect the positioning ear piece 3 and the profile extension area 10 through the first ear piece positioning hole and the second ear piece positioning hole.

[0052] The forming mold 1 is made of carbon structural steel. The outer shape of the forming mold 1 is a polygonal structure, preferably a dodecagon, or a quasi-circular structure. The forming mold 1 includes a plurality of component plates 12, and the internal component plates 12 are arranged perpendicular to each other to form a quadrilateral honeycomb structure. Since the forming mold 1 is composed of a plurality of component plates 12 spliced ​​together and a simple vertical arrangement is adopted internally, the processing difficulty, design difficulty and cost are low. A weight-reducing hole structure is provided on the component plate 12, and the weight-reducing hole structure can also play a role in ventilation. According to the difference between the expansion coefficient of the reflector skin and the expansion coefficient of the forming mold 1, the forming mold 1 sets a mold thermal compensation coefficient, and the scaling origin of the forming mold 1 is set at the lowest point of the molding surface corresponding to the reflector placement plane; the central axis of the relatively arranged positioning ear piece 3 passes through the scaling origin of the forming mold 1.

[0053] A plurality of ball head support points 6 are provided on the reverse side of the forming die 1 . In a preferred embodiment, the plurality of ball head support points 6 are three, and the three ball head support points 6 are arranged in a triangle to support the forming die 1 .

[0054] The reverse side of the forming die 1 is also provided with a plane support point 7, and the ball head support point 6 is 10 mm to 15 mm higher than the plane support point 7. When in use, the three ball head support points 6 are mainly used to contact the outside world first, such as the three ball head support points 6 first contact the ground and the test platform, and the plane support point 7 is used to adjust the flatness of the forming die 1. If the ground and the test platform are inclined, it can be adjusted by placing a pad under the plane support point 7.

[0055] The horizontal extension area 9 is provided with a plurality of reference blocks 8, and each reference block 8 is provided with a reference hole with a taper angle. In a preferred example, the number of the reference blocks 8 is 4, and they are arranged opposite to each other in pairs, and the two reference blocks 8 arranged opposite to each other are defined as a group, and the sides of the two reference blocks 8 in each group are located in the same plane, and the planes where the sides of the two groups of reference blocks 8 are located are defined as the first plane and the second plane, respectively, and the first plane is perpendicular to the second plane, and the first plane and the second plane are both perpendicular to the horizontal plane. That is, the first plane, the second plane and the horizontal plane can form a three-dimensional coordinate system.

[0056] The production steps of the present invention are as follows:

[0057] S1. Select ordinary carbon structural steel as the material of forming die 1 according to the shape structure and size requirements of the antenna reflector, confirm the thermal expansion coefficient of the steel and the inner skin of the antenna reflector, and calculate the compensation coefficient of forming die 1.

[0058] S2. Set the antenna reflector placement plane according to the shape and structure of the antenna reflector, find the lowest point of the corresponding plane, and set the scaling origin of the molding die 1 at this point.

[0059] S3. According to the size and shape of the reflector, three ball head support points 6 and multiple plane support points 7 are set at appropriate positions, wherein the ball head support point 6 is 10 mm higher than the plane support point 7.

[0060] S4. The molding die 1 is provided with a profile extension area 10 along the direction of the antenna reflector profile generatrix and a horizontal extension area 9 parallel to the reflector placement plane.

[0061] S5. Four reference blocks 8 are set in the horizontal extension area 9, the side surfaces of two relative reference blocks 8 are coplanar, and the side surfaces of the other two relative reference blocks 8 are coplanar, and the two groups of side surfaces are perpendicular to the upper surface of the reference block 8, and each reference block 8 is also provided with a reference hole with a tapered angle.

[0062] S6. Four thin-sheet step structure positioning lugs 3 are arranged according to the size and shape of the reflector, and the lower surface of the positioning lug 3 coincides with the profile of the profile extension area 10 of the forming mold 1. The positioning lug 3 is provided with a circular and a waist-shaped positioning hole, wherein the waist-shaped directions of the waist-shaped holes of two positioning lugs 3 are collinear, and the waist-shaped directions of the waist-shaped holes of the other two positioning lugs 3 are collinear, and the waist-shaped directions of the two groups of waist-shaped holes are cross-shaped and the intersection point passes through the scaling origin of the forming mold 1. At the same time, the profile extension area 10 is provided with lug positioning holes, which are two circular positioning holes and can correspond to the circular and waist-shaped holes of the positioning lug 3.

[0063] S7. Select different hole positions and long and short ear positioning pins 4 according to different molding and assembly states of the antenna reflector, select the matching relationship between the circular and waist-shaped positioning holes on the positioning ear 3 and the two circular positioning holes on the profile extension area 10 according to different molding and assembly states of the antenna reflector, and then install the positioning ear 3 on the profile extension area 10.

[0064] S8. Install the surrounding strip 2 in the profile extension area 10 of the forming mold 1. There is a 10mm profile compensation area between the inner side of the surrounding strip 2 and the reflector shape, and a 10mm gap is left on one side at the positioning ear piece 3.

[0065] S9. According to the structure and size of the back ribs of the antenna reflector, a suitable back rib positioning plate 5 is arranged in the horizontal extension area 9 of the forming die 1.

[0066] The present invention has a simple structure and low design difficulty. The present invention can be used in various working conditions such as skin forming, sandwich structure bonding, and back reinforcement assembly. Specifically, when in the skin forming working condition, each ear piece performs the following operations to position the skin:

[0067] A short ear piece positioning pin 4 is used to connect the first ear piece positioning hole and a second circular positioning hole; another short ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and another second circular positioning hole, which is a second circular positioning hole closer to the center of the forming mold 1;

[0068] At this time, the skin is located between the positioning ear piece 3 and the forming mold 1.

[0069] When in sandwich structure bonding condition, each lug performs the following operations to position the skin:

[0070] A long ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold 1;

[0071] At this time, the sandwich structure is located between the positioning ear piece 3 and the forming mold 1 .

[0072] When the back reinforcement is in the assembly state, a short ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold 1;

[0073] At this time, the sandwich structure is located between the positioning ear piece 3 and the forming mold 1. After the process is completed, a reflector is formed. In summary, the two second circular positioning holes of the present invention can be selectively connected with the first circular positioning hole and the waist-shaped positioning hole according to different working conditions and needs, and when connected with the waist-shaped positioning hole, they can also be selectively connected with different positions of the waist-shaped positioning hole according to different working conditions and needs. In addition, the connecting parts of the two second circular positioning holes can also be selected from the long ear piece positioning pins and the short ear piece positioning pins according to different working conditions and needs.

[0074] The high-precision reflector forming and assembly mold of the present invention has high structural strength and rigidity, and the placement state is uniform and stable; for example, the selection of carbon structural steel for the forming mold 1, and the internal component plates 12 are arranged perpendicular to each other to form a quadrilateral honeycomb structure, which can ensure the structural strength and rigidity of the present invention, and the three ball head support points 6 are arranged in a triangle, and the flatness of the forming mold 1 can be adjusted with the help of the plane support points 7, ensuring the uniform and stable placement state of the present invention.

[0075] In addition, the invention has the advantages of being easy to process, being reusable, and having low cost; being able to form and glue large-caliber antenna reflectors, improving the profile accuracy, and improving product quality.

[0076] In summary, the high-precision antenna reflector forming and assembly mold of the present invention can be optimized according to the constraints of the actual production of carbon fiber skin aluminum honeycomb sandwich antenna reflector form structure, size requirements and other constraints. This structural mold can be used to form the inner skin of the reflector, and can also be used to form the honeycomb sandwich structure of the reflector. At the same time, it can also be used to glue the back ribs of the reflector, so that a set of molds can meet the use requirements of reflector molding, gluing and assembly in different states. This mold form has the advantages of simple structure, low design difficulty and low cost, and can achieve multiple uses of one mold. The positioning reference of the reflector surface in the states of inner skin molding, honeycomb sandwich molding and back rib gluing is unified, and the antenna reflector surface has higher precision and more stable quality.

[0077] The present invention also provides an antenna reflector forming and assembling method, including the antenna reflector forming and assembling mold, and also includes the following method:

[0078] When in the skin forming state, each tab performs the following operations to position the skin:

[0079] A short ear piece positioning pin 4 is used to connect the first ear piece positioning hole and a second circular positioning hole;

[0080] Another short ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and another second circular positioning hole, and the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold 1;

[0081] At this time, the skin is located between the positioning ear piece 3 and the forming die 1;

[0082] When the sandwich structure is in bonding condition, each ear piece performs the following operations to position the sandwich structure:

[0083] A long ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold 1;

[0084] At this time, the sandwich structure is located between the positioning ear piece 3 and the forming mold 1;

[0085] When the back reinforcement is in the assembly state, a short ear piece positioning pin 4 is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold 1;

[0086] At this time, the sandwich structure is located between the positioning ear piece 3 and the forming mold 1. After the process is completed, a reflector is formed.

[0087] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0088] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An antenna reflector forming assembly mold, characterized in that: It comprises a forming die (1), a surrounding strip (2), a positioning ear piece (3), an ear piece positioning pin (4), and a back rib positioning plate (5); The front side of the forming die (1) is provided with a profile extension area (10) along the generatrix direction of the reflector profile and a horizontal extension area (9) parallel to the reflector placement plane; The positioning ear piece (3) is a step structure, the lower surface of which is detachably connected to the profile extension area (10), and the positioning ear piece (3) is provided with a first ear piece positioning hole, wherein the first ear piece positioning hole comprises a first circular positioning hole and a waist-shaped positioning hole; The number of the positioning ear pieces (3) is multiple; the multiple positioning ear pieces (3) are arranged opposite to each other in pairs, and the waist-shaped directions of the waist-shaped holes of the oppositely arranged positioning ear pieces (3) are collinear; The reflector back rib positioning plate (5) is installed in the horizontal extension area (9); The surrounding strip (2) is installed on the profile extension area (10), and a profile compensation area (11) of a first size is provided between the inner side surface of the surrounding strip (2) and the outer shape of the reflector. The surrounding strip (2) is a discontinuous structure, and a gap of a second size is provided on one side at the positioning ear piece (3); The profile extension area (10) is provided with a second ear piece positioning hole, which is a second circular positioning hole, and the second circular positioning hole can match the first circular positioning hole and / or the waist-shaped positioning hole on the positioning ear piece (3). The ear piece positioning pin (4) comprises a long ear piece positioning pin and a short ear piece positioning pin; the ear piece positioning pin (4) is used to connect the positioning ear piece (3) and the profile extension area (10) through the first ear piece positioning hole and the second ear piece positioning hole.

2. The antenna reflector forming assembly mold according to claim 1, characterized in that: The forming die (1) is made of carbon structural steel.

3. The antenna reflector forming assembly mold according to claim 1, characterized in that: According to the difference between the expansion coefficient of the reflector skin and the expansion coefficient of the forming mold (1), the forming mold (1) sets a mold thermal compensation coefficient, and the scaling origin of the forming mold (1) is set at the lowest point of the molding surface corresponding to the reflector placement plane; The central axis where the relatively arranged positioning ears (3) are located is the scaling origin of the overforming die (1).

4. The antenna reflector forming assembly mold according to claim 1, characterized in that: A plurality of ball head support points (6) are arranged on the reverse side of the forming die (1).

5. The antenna reflector forming assembly mold according to claim 4, characterized in that: The plurality of ball head support points (6) is three, and the three ball head support points (6) are arranged in a triangle, for supporting the forming die (1).

6. The antenna reflector forming assembly mold according to claim 5, characterized in that: A plane support point (7) is also provided on the reverse side of the forming die (1). The ball head support point (6) is 10 mm to 15 mm higher than the plane support point (7).

7. The antenna reflector forming assembly mold according to claim 1, characterized in that: A plurality of reference blocks (8) are provided on the horizontal extension area (9), and each reference block (8) is also provided with a reference hole with a cone angle.

8. The antenna reflector forming assembly mold according to claim 7, characterized in that: The number of the reference blocks (8) is four, which are arranged opposite to each other in pairs, and the side surfaces of two opposite reference blocks (8) are coplanar.

9. The antenna reflector forming assembly mold according to claim 1, characterized in that: The first size is 10 mm to 15 mm and the second size is 5 mm to 10 mm.

10. A method for forming and assembling an antenna reflector, characterized in that: The antenna reflector forming and assembly mold according to any one of claims 1 to 9 also includes the following method: When in the skin forming state, each tab performs the following operations to position the skin: A short ear piece positioning pin (4) is used to connect the first ear piece positioning hole and a second circular positioning hole; Another short ear piece positioning pin (4) is used to connect the waist-shaped positioning hole and another second circular positioning hole, wherein the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold (1); At this time, the skin is located between the positioning ear piece (3) and the forming mold (1); When the sandwich structure is in bonding condition, each ear piece performs the following operations to position the sandwich structure: A long ear piece positioning pin (4) is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold (1); At this time, the sandwich structure is located between the positioning ear piece (3) and the forming mold (1); When in the back reinforcement assembly working state, a short ear piece positioning pin (4) is used to connect the waist-shaped positioning hole and a second circular positioning hole; the second circular positioning hole is a second circular positioning hole closer to the center of the forming mold (1); At this time, the sandwich structure is located between the positioning ear piece (3) and the forming mold (1). After the process is completed, a reflector is formed.

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