Wind turbine blade adhesive blocking structure and method

Abstract

The application discloses a wind power blade bonding glue blocking structure and a method thereof. The wind power blade bonding glue blocking structure comprises a leading edge blocking glue structure; the leading edge blocking glue structure comprises a leading edge blocking glue strip; the leading edge blocking glue strip is in an overall L shape, is arranged at the front end of a leading edge bonding glue overflow channel, can make the leading edge bonding glue overflow channel turn and reduce the flux of the leading edge bonding glue overflow channel, and comprises a leading edge blocking glue connecting part and a leading edge bonding glue overflow guiding part which is connected to the leading edge blocking glue connecting part in an inclined manner. The leading edge blocking glue connecting part is arranged at the edge position of the bonding area of the leading edge of the second half skin, and the leading edge bonding glue overflow guiding part is adjacent to the end of the leading edge bonding angle, and the leading edge bonding glue overflow guiding part and the end of the leading edge bonding angle have a gap A which is suitable for the overflow of the leading edge bonding glue. Therefore, the application solves the problem of large glue extrusion amount in the leading edge bonding angle area cavity in the blade bonding, and can also assist in solving the problem of glue layer thickness exceeding the thickness caused by the deformation of the bonding angle.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wind turbine blade production, and particularly relates to a method for blocking adhesive of a wind turbine blade. BACKGROUND

[0002] The wind turbine blade is formed by bonding the windward surface skin and the leeward surface skin. At the front and rear edges of the wind turbine blade, the bonding surface is formed by bonding the angle glass fiber reinforced plastic on one side of the skin, and the other side of the skin is bonded. The bonding angle plays an auxiliary bonding role. In order to ensure the bonding quality of the blade and prevent defects such as lack of adhesive in the bonding area, the amount of adhesive used is usually increased by 1.3 times, which causes the excess adhesive to be squeezed in the inside and outside of the blade. The squeezed adhesive will slowly fall off during the operation of the blade, and the internal structure of the blade will be damaged by collision in the cavity.

[0003] In order to prevent too much adhesive from being squeezed into the inside of the blade, a blocking strip is usually arranged at the rear edge of the windward surface (PS surface) skin. At present, there are two kinds of related technologies for the blocking edge:

[0004] Chinese patent CN113968029A discloses a method for forming a blocking strip of a wind turbine blade. The specific scheme is to integrally pour the blocking strip with the skin after the blocking strip is preformed. Therefore, this method has the following defects: 1. high manufacturing cost: the secondary manufacturing cost is increased, and the production time is affected; 2. high quality risk: the blocking strip is preformed, and then the blocking strip is preformed together with the product. The flexibility of the blocking strip and the matching of the skin are problematic, which affects the blocking effect of the blocking strip; 3. material waste: the size of the blocking strip is not specified, and the smaller blocking strip has a risk of deformation during blocking; 4. the blocking edge is only suitable for the rear edge blocking edge, and the front edge area is not mentioned, so the range of use is small.

[0005] Chinese patent CN107061446A discloses a method for preparing a wind turbine blade with reduced residual adhesive residue. The front edge is directly provided with a blocking edge on the bonding angle, which affects the bonding effect. On the other hand, the cost of developing a negative mold for making the blocking strip is relatively high. In the batch production process, the negative mold is prone to accumulate rich resin, and the product needs to be cleaned before use, which increases the workload. SUMMARY

[0006] The technical purpose of the present application is to solve the problems of the prior art, and to provide a wind turbine blade bonding adhesive blocking structure and method with reasonable process design, which can solve the problem of excessive adhesive squeezing in the front edge bonding angle area of the blade in the prior art, and can also solve the problem of excessive thickness of the adhesive layer caused by deformation of the bonding angle.

[0007] To achieve the above technical purposes, the present application will adopt the following technical solutions:

[0008] The wind power blade adhesive glue blocking structure comprises a leading edge blocking glue structure capable of preventing the leading edge adhesive glue filled in the leading edge part of the wind power blade from overflowing; the leading edge of the wind power blade comprises a first half piece skin leading edge and a second half piece skin leading edge, the first half piece skin leading edge is provided with a leading edge bonding corner, and the first half piece skin leading edge and the second half piece skin leading edge are bonded into an integrated whole through the leading edge adhesive glue filled in the leading edge bonding corner; the leading edge blocking glue structure comprises a leading edge blocking glue strip; the leading edge blocking glue strip is in an overall L shape, is arranged at the front end of a leading edge adhesive glue overflow channel, can guide the leading edge adhesive glue overflow channel to change direction and reduce the flux of the leading edge adhesive glue overflow channel, and comprises a leading edge blocking glue connecting part and a leading edge adhesive glue overflow guiding part which is connected to the leading edge blocking glue connecting part in an inclined manner and has an included angle α greater than 90° with the leading edge blocking glue connecting part;

[0009] The leading edge blocking glue connecting part is arranged at the bonding area edge position of the second half piece skin leading edge, the leading edge adhesive glue overflow guiding part is adjacent to the end of the leading edge bonding corner, and a gap A suitable for the leading edge adhesive glue overflow is arranged between the leading edge adhesive glue overflow guiding part and the end of the leading edge bonding corner, so that when the first half piece skin leading edge and the second half piece skin leading edge are combined, the excess leading edge adhesive glue can be extruded through the gap A, and the leading edge adhesive glue overflow guiding part, the end of the leading edge bonding corner and the bonding area of the second half piece skin leading edge are bonded into an integrated whole through the leading edge adhesive glue.

[0010] Preferably, the leading edge blocking glue strip is preformed together with the second half piece skin leading edge or the leading edge blocking glue connecting part of the leading edge blocking glue strip is bonded to the bonding area edge position of the second half piece skin leading edge through gluing.

[0011] Preferably, the wind power blade adhesive glue blocking structure further comprises a trailing edge blocking glue structure capable of preventing the trailing edge adhesive glue filled in the trailing edge part of the wind power blade from overflowing, and the trailing edge blocking glue structure comprises a trailing edge blocking glue strip.

[0012] The trailing edge of the wind power blade comprises a first half piece skin trailing edge and a second half piece skin trailing edge, the first half piece skin trailing edge is provided with a trailing edge bonding corner, and the first half piece skin trailing edge and the second half piece skin trailing edge are bonded into an integrated whole through the trailing edge adhesive glue filled in the trailing edge bonding corner.

[0013] The rear edge glue blocking strip is V-shaped as a whole, is arranged at the front end of the rear edge bonding glue overflow channel, can guide the rear edge bonding glue overflow channel to turn and reduce the flux of the rear edge bonding glue overflow channel, and comprises a rear edge glue blocking connecting part and a rear edge glue overflow guiding part which is connected to the rear edge glue blocking connecting part in an inclined manner and the included angle β between the two is less than 90°. The rear edge glue blocking connecting part is arranged at the edge position of the bonding area of the rear edge of the second half skin, and the rear edge glue overflow guiding part is adjacent to the end of the rear edge of the first half skin. Meanwhile, the rear edge glue overflow guiding part and the first half skin have a gap B suitable for the overflow of the rear edge bonding glue. When the rear edges of the first half skin and the second half skin are combined, the excess rear edge bonding glue can be extruded through the gap B, and the rear edges of the first half skin and the second half skin and the rear edge glue overflow guiding part are combined by the rear edge bonding glue.

[0014] Preferably, the rear edge glue blocking strip is preformed together with the rear edge of the second half skin, or the rear edge glue blocking connecting part of the rear edge glue blocking strip is bonded to the edge position of the bonding area of the rear edge of the second half skin by gluing.

[0015] Another technical purpose of the present application is to provide a wind power blade bonding glue blocking method which can form the wind power blade bonding glue blocking structure described above, comprising the following steps:

[0016] Step one, forming the first and second half skins respectively

[0017] Step 1.1, preforming the first half skin, and the leading edge and the rear edge of the formed first half skin are integrally formed with a leading edge bonding corner and a rear edge bonding corner respectively;

[0018] Step 1.2, preforming the second half skin, and the formed second half skin is integrally formed with a front edge glue blocking strip and a rear edge glue blocking strip at the edge position of the front edge bonding area and the rear edge bonding area respectively;

[0019] Step two, combining the first and second half skins

[0020] Step 2.1, after the skin product is poured and cured, the surface of the preformed second half skin is cleaned by pouring auxiliary materials;

[0021] Step 2.2, after the core material filling block inside the front edge glue blocking strip and the rear edge glue blocking strip is taken out, the formed front edge glue blocking strip and the rear edge glue blocking strip are cut by using a cutting machine to obtain the front edge glue blocking strip and the rear edge glue blocking strip meeting the requirements;

[0022] Step 2.3, using a turnover mold to test the combination of the two half skins, verifying the front edge bonding gap, and confirming whether the front edge bonding corner can be inserted between the front edge glue blocking strip and the second half skin and whether the lap length of the front edge glue blocking strip and the end of the front edge bonding corner is the preset lap length. whether the gap between the front edge glue blocking strip and the end of the front edge bonding angle exceeds 20 mm, and whether the overlap length between the rear edge glue blocking strip and the first skin bonding area is the preset overlap length whether the gap between the rear edge glue overflow guide and the first skin rear edge bonding area exceeds the preset gap Ah b ;

[0023] Step 2.4, applying bonding glue on the front edge and rear edge bonding angle, and the bonding glue is applied according to the designed glue shape;

[0024] Step 2.5, using the flip-over mold to perform the mold closing operation on the two half skins, slowly lowering the first half skin to insert the front edge bonding angle with the front edge bonding glue into the lower side of the front edge glue blocking strip, continuing to slowly lower the upper part of the skin, the front edge bonding glue is squeezed out from the gap between the front edge glue blocking strip and the end of the front edge bonding angle and accumulated between the front edge glue blocking strip and the end of the front edge bonding angle, and the rear edge bonding glue is squeezed out from the gap between the rear edge glue blocking strip and the first skin rear edge bonding area and accumulated between the end of the rear edge glue blocking strip and the first skin rear edge bonding area, and then using a scraper to collect the glue, so that the squeezed out front edge bonding glue is respectively connected with the circular arc transition between the front edge glue blocking strip and the end of the front edge bonding angle, and the squeezed out rear edge bonding glue is respectively connected with the circular arc transition between the rear edge glue blocking strip and the first skin rear edge bonding area; at the same time, the length of the front edge bonding glue squeezed out from the gap between the front edge glue blocking strip and the end of the front edge bonding angle on the front edge glue blocking strip is the overlap length the length of the rear edge bonding glue squeezed out from the gap between the rear edge glue blocking strip and the first skin rear edge bonding area on the rear edge glue blocking strip is the overlap length

[0025] Step 2.6, turn on the mold heating, the glue blocking strip and the bonding glue together with the product perform the post-curing, and the lifting blade TG value is greater than or equal to 75°C.

[0026] Preferably, the specific process of integrally forming the front edge glue blocking strip on the second half skin includes the following steps:

[0027] Step 1.2.1, line positioning of the front edge glue blocking strip

[0028] In the front edge bonding area of the second half skin base material, according to the preset bonding width of the front edge glue blocking strip, the installation site A of the front edge glue blocking strip is positioned by line close to the edge position of the front edge bonding area of the second half skin base material; the installation site A of the front edge glue blocking strip is the turning point of the front edge glue blocking strip;

[0029] Step 1.2.2, placing the front edge glue blocking strip core material

[0030] The pre-prepared front edge glue blocking strip core material is placed on the second half skin base material in the prismatic direction along the installation site of the front edge glue blocking strip determined in step 1.2.1.

[0031] The front edge glue blocking strip core material is triangular in overall shape, with a bottom edge configured as a first skin fitting edge matching the shape of the second half skin base material at the installation position, and two side edges connected to the bottom edge, one of which is configured as a first glue blocking strip fitting edge with a length L q , and the first glue blocking strip fitting edge forms an angle a with the first skin fitting edge, and the remaining side edge is horizontally arranged with a length Lp;

[0032] The angle a satisfies:

[0033]

[0034] The length L of the front edge glue overflow guide part of the front edge glue blocking strip q satisfies:

[0035]

[0036] In the formula: Δh represents the distance of the end of the front edge bonding angle relative to the second skin front edge bonding area, and Δh q is the gap between the end of the front edge bonding angle and the first skin front edge bonding area; Lp represents the overlap length between the front edge glue overflow guide part and the end of the front edge bonding angle;

[0037] Step 1.2.3, laying the base material of the front edge glue blocking strip

[0038] The base material of the front edge glue blocking strip is laid such that the part of the base material of the front edge glue blocking strip overlaps the installation site of the front edge glue blocking strip determined in step 1.2.1, and the part overlaps the core material of the front edge glue blocking strip; the shape of the core material of the front edge glue blocking strip can ensure that the part of the base material of the front edge glue blocking strip overlapping the second half skin base material forms an angle a with the part overlapping the core material of the front edge glue blocking strip;

[0039] Step 1.2.4, covering the vacuum film outside the front edge glue blocking strip base material and the front edge glue blocking strip core material, and overlapping the two ends of the vacuum film to the second half skin base material;

[0040] Step 1.2.5, after vacuumizing, integrally injection molding and curing;

[0041] Step 1.2.6, cleaning the front edge glue blocking strip core material, and obtaining the required front edge glue blocking strip.

[0042] Preferably, the specific process of integrally forming the rear edge glue blocking strip on the second half skin includes the following steps:

[0043] Step 1.2.a, marking and positioning

[0044] In the second half of the skin base material rear edge bonding area, according to the preset rear edge adhesive tape bonding width, the installation site B of the rear edge adhesive tape is positioned by drawing a line close to the edge position of the rear edge bonding area of the second half of the skin base material; the installation site B of the rear edge adhesive tape is the turning point of the rear edge adhesive tape.

[0045] Step 1.2.b, laying the base material of the rear edge adhesive tape

[0046] Laying the base material of the rear edge adhesive tape, so that the base material part of the rear edge adhesive tape overlaps the installation site B of the rear edge adhesive tape determined in step 1.2.1;

[0047] Step 1.2.c, placing the core material of the rear edge adhesive tape

[0048] Placing the pre-prepared core material of the rear edge adhesive tape on the rear edge adhesive tape base material laid in step 1.2.b at the installation site B of the rear edge adhesive tape, and overlapping the remaining part of the rear edge adhesive tape base material on the rear edge adhesive tape core material, the shape of the rear edge adhesive tape core material can make the part of the rear edge adhesive tape base material overlapping the installation site of the rear edge adhesive tape form an angle β with the part overlapping the rear edge adhesive tape core material;

[0049] The overall structure of the rear edge adhesive tape core material is triangularly arranged, the bottom edge is arranged to match the second skin fitting edge of the second half of the skin shape adjacent to the installation site B of the rear edge adhesive tape; two side edges connected with the bottom edge, one of which is arranged as a second adhesive tape fitting edge, the length is And the second adhesive tape fitting edge and the second skin fitting edge form an angle β, and the remaining side edge is arranged to be inclined, and the length is

[0050] The angle β satisfies:

[0051]

[0052] In the formula: Δh b The gap between the rear edge adhesive overflow guide part and the first skin rear edge bonding area is 5-10mm; The rear edge bonding thickness between the first skin rear edge bonding area and the second skin rear edge bonding area; The overlap length between the rear edge adhesive overflow guide part and the first skin rear edge bonding area is 10mm-50mm;

[0053] The length of the second adhesive tape fitting edge satisfies:

[0054]

[0055] Step 1.2.d, covering the vacuum film on the outside of the trailing edge glue strip base material and the trailing edge glue strip core material, and the vacuum film is overlapped on the second half of the skin base material at both ends;

[0056] Step 1.2.e, after vacuumizing, the whole is injection molded and cured;

[0057] Step 1.2.f, clean the trailing edge glue strip core material, and the required trailing edge glue strip is obtained.

[0058] Preferably, the front edge and trailing edge glue strip core materials are both PVC foam structures, and are wrapped and sealed with non-porous release cloth and release cloth; the base materials of the front edge and trailing edge glue strips are both biaxial cloth.

[0059] Preferably, the positioning line of the front edge glue strip = the bonding width of the front edge glue strip + 30 ± 20, and the positioning line of the trailing edge glue strip = the bonding width of the trailing edge glue strip + 30 ± 20, in mm.

[0060] Preferably, in step 1.2.4, the length of the front edge glue strip base material overlapped on the second half of the skin base material is 30-40 mm, and the length of the front edge glue strip base material overlapped on the front edge glue strip core material is also 30-40 mm.

[0061] Based on the above technical purposes, compared with the prior art, the present application has the following advantages:

[0062] (1) The present application can reduce the extrusion of excess bonding glue in the blade cavity during the bonding of the blade by preforming or bonding the glue strip.

[0063] (2) The glue strip uses glass steel material, and the surface uses release cloth with rough bonding surface, which has good bonding effect when connected and attached with the bonding glue, and can continuously ensure that the excess bonding glue does not fall off during the operation of the blade, thereby improving the quality of the blade.

[0064] (3) The glue strip made by the present application has good formability and can completely match the skin bonding area profile, which can effectively ensure the gap and positioning of the glue strip. When the bonding angle thickness is thin and deformed during bonding, the glue strip can play a blocking role.

[0065] (4) The glue strip can be formed and made at one time by using the preforming method listed in the present application, without the need for additional molds, which can greatly reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 is a structural schematic view of the wind power blade bonding glue blocking structure at the front edge position according to the present application;

[0067] Figure 2 is a process flow structural schematic view of the integrally formed front edge glue strip;

[0068] Figure 3 is a structural schematic diagram of the first and second half skins combined (leading edge);

[0069] Figure 4 is a structural schematic diagram of the second half skin with the leading edge glue blocking strip bonded thereon;

[0070] Figure 5 is a structural schematic diagram of the first and second half skins combined (trailing edge);

[0071] Figure 6 is a process flow structural schematic diagram of the integrally formed trailing edge glue blocking strip.

[0072] Figure 7 is a sectional view of the leading edge glue blocking strip core material;

[0073] Figure 8 is a sectional view of the trailing edge glue blocking strip core material;

[0074] Figure 9 is Figure 3 is a local enlarged view of the position of the leading edge glue blocking strip in the middle;

[0075] Figures 1 to 6 : 11, first half skin leading edge; 12, second half skin leading edge; 13, first half skin trailing edge; 14, second half skin trailing edge; 2, leading edge bonding angle; 3, leading edge bonding glue; 4, leading edge glue blocking strip; 5, bonding area edge position of the second half skin leading edge; 6, glue blocking strip bonding glue; 7, leading edge glue blocking strip core material; 7-1, first skin fitting edge; 7-2, first glue blocking strip fitting edge; 8, vacuum film; 9, trailing edge glue blocking strip; 10, trailing edge glue blocking strip core material; 10-1, second skin fitting edge; 10-2, second glue blocking strip fitting edge; 10-3, included angle cutting edge. DETAILED DESCRIPTION

[0076] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is merely illustrative in nature and not intended to be limiting on the present application and its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application. The relative arrangement, expression and values of the components and steps set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. The technology, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification when appropriate. In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values.

[0077] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations).

[0078] Embodiment 1

[0079] As shown in Figures 1 to 6 , the wind power blade adhesive blocking structure of the present application comprises a leading edge blocking structure capable of preventing the leading edge adhesive 3 filled in the leading edge part of the wind power blade from overflowing (see Figure 1 ) and a trailing edge blocking structure capable of preventing the trailing edge adhesive filled in the trailing edge part of the wind power blade from overflowing (see Figure 5 ).

[0080] Generally, as Figure 1As shown, the wind power blade leading edge comprises a first half skin leading edge 11 and a second half skin leading edge 12, the first half skin leading edge 11 is provided with a leading edge bonding angle 2, and the first half skin leading edge 11 and the second half skin leading edge 12 are bonded into an integrated body by a leading edge adhesive filled in the leading edge bonding angle 2; in order to improve the adverse effects of the overflow of the leading edge adhesive, the leading edge adhesive overflow structure is provided as a leading edge adhesive overflow strip 4; the leading edge adhesive overflow strip 4 is in an overall L shape, is arranged at the front end of the overflow channel of the leading edge adhesive 3, can divert the overflow channel of the leading edge adhesive 3 and reduce the flux of the overflow channel of the leading edge adhesive 3, and comprises a leading edge adhesive overflow connecting part and a leading edge adhesive overflow guiding part which is connected to the leading edge adhesive overflow connecting part in an inclined manner and has an included angle α greater than 90° with the leading edge adhesive overflow connecting part.

[0081] The leading edge adhesive overflow connecting part is arranged at the bonding area edge position 5 of the second half skin leading edge, the leading edge adhesive overflow guiding part is adjacent to the end of the leading edge bonding angle 2, and the leading edge adhesive overflow guiding part and the end of the leading edge bonding angle 2 have a gap A suitable for the overflow of the leading edge adhesive 3 therebetween, so that when the first half skin leading edge 11 and the second half skin leading edge 12 are combined, the excess leading edge adhesive can be extruded through the gap A, and the leading edge adhesive overflow guiding part, the end of the leading edge bonding angle 2 and the bonding area of the second half skin leading edge 12 are bonded into an integrated body by the leading edge adhesive 3.

[0082] The leading edge adhesive overflow strip 4 is prefabricated together with the second half skin leading edge 12 (referring to the attached drawings 1 and 2), or the leading edge adhesive overflow connecting part of the leading edge adhesive overflow strip 4 is bonded to the bonding area edge position 5 of the second half skin leading edge by means of glue (referring to the attached drawings 3 and 4). Figure 3 Figure 5

[0083] In order to improve the adverse effects of the overflow of the trailing edge adhesive, the trailing edge adhesive overflow structure is provided as a trailing edge adhesive overflow strip 9. As shown in the attached drawings 5 and 6, the trailing edge adhesive overflow strip 9 is in an overall L shape, is arranged at the front end of the overflow channel of the trailing edge adhesive 8, can divert the overflow channel of the trailing edge adhesive 8 and reduce the flux of the overflow channel of the trailing edge adhesive 8, and comprises a trailing edge adhesive overflow connecting part and a trailing edge adhesive overflow guiding part which is connected to the trailing edge adhesive overflow connecting part in an inclined manner and has an included angle β greater than 90° with the trailing edge adhesive overflow connecting part. Figure 5 ​​As shown, generally, the trailing edge of the wind power blade includes a first half skin trailing edge 13 and a second half skin trailing edge 14, the first half skin trailing edge 13 is provided with a trailing edge bonding corner, and the first half skin trailing edge 13 and the second half skin trailing edge 14 are bonded into an integrated body by a trailing edge bonding glue filled in the trailing edge bonding corner; in the present application, the trailing edge glue blocking strip 9 is V-shaped as a whole, is arranged at the front end of the trailing edge bonding glue overflow channel, can promote the trailing edge bonding glue overflow channel to turn and reduce the flux of the trailing edge bonding glue overflow channel, includes a trailing edge glue blocking connecting part and a trailing edge glue overflow guiding part which is connected to the trailing edge glue blocking connecting part in an inclined manner and the included angle β between the two is less than 90°, the trailing edge glue blocking connecting part is arranged at the bonding area edge position of the second half skin trailing edge 14, and the trailing edge glue overflow guiding part is adjacent to the end of the first half skin trailing edge 13, and meanwhile, the trailing edge glue overflow guiding part and the first half skin trailing edge 13 have a gap B suitable for trailing edge bonding glue overflow, so that when the first half skin trailing edge 13 and the second half skin trailing edge 14 are combined, the excess trailing edge bonding glue can be extruded through the gap B, and the trailing edge bonding glue overflow guiding part, the bonding area of the first half skin trailing edge 13 and the second half skin trailing edge 14 are bonded into an integrated body by the trailing edge bonding glue.

[0084] The trailing edge glue blocking strip 9 is prefabricated and formed together with the second half skin trailing edge 14, or the trailing edge glue blocking connecting part of the trailing edge glue blocking strip 9 is bonded to the bonding area edge position of the second half skin trailing edge 14 by gluing.

[0085] Embodiment 2

[0086] The present embodiment provides a wind power blade bonding glue blocking method, referring to the accompanying drawings Figure 2 , the accompanying drawings Figure 6 , the wind power blade bonding glue blocking structure can be formed, including the following steps:

[0087] Step one, respectively forming first and second half skins

[0088] Step 1.1, prefabricating and forming the first half skin, the leading edge and the trailing edge of the formed first half skin are respectively integrally formed with a leading edge bonding corner and a trailing edge bonding corner;

[0089] Step 1.2, prefabricating and forming the second half skin, the leading edge and the trailing edge of the formed second half skin are respectively integrally formed with a leading edge glue blocking strip 9 and a trailing edge glue blocking strip 9 at the edge position of the bonding area;

[0090] The specific process of integrally forming the leading edge glue blocking strip 9 and the trailing edge glue blocking strip 9 on the second half skin includes the following steps:

[0091] Step 1.2.1, scribing and positioning

[0092] At the front edge and rear edge bonding area of the second half piece of skin base material, according to the bonding width of the preset front edge and rear edge glue blocking strip 9, the installation position A and B of the front edge and rear edge glue blocking strip 9 is positioned at the edge position of the front edge and rear edge bonding area of the second half piece of skin base material by marking; the installation position A of the front edge glue blocking strip 4 is the turning point of the front edge glue blocking strip 4, and the installation position B of the rear edge glue blocking strip 9 is the turning point of the rear edge glue blocking strip 9.

[0093] Step 1.2.2, placing the front edge glue blocking strip core material 7

[0094] The prepared front edge glue blocking strip core material 7 is placed on the second half piece of skin base material in the direction of the prism along the front edge glue blocking strip installation position A determined in step 1.2.1;

[0095] The front edge glue blocking strip core material 7 is arranged in a triangular shape as a whole, the bottom edge is arranged to match the shape of the first skin fitting edge 7-1 at the placement position, and the two side edges connected with the bottom edge, one of which is arranged as the first glue blocking strip fitting edge 7-2 (the length is denoted as L q ), and the first glue blocking strip fitting edge 7-2 forms an included angle α with the first skin fitting edge 7-1, and the remaining one side edge is arranged horizontally, and the length is denoted as Lp.

[0096] Assuming that the adjacent area of the end of the front edge bonding angle 2 is parallel to the front edge bonding area, the included angle α satisfies:

[0097]

[0098] Therefore, the length L q of the front edge glue overflow guide part of the front edge glue blocking strip 4 satisfies:

[0099]

[0100] In the formula: h represents the distance of the end of the front edge bonding angle 2 relative to the front edge bonding area, and the unit is mm, and h is usually 10 mm; Δh q is an empirical value, and Δh q is 5-10 mm, and in the present application, Δh q is 5 mm; therefore, the minimum value of the height h q is 15 mm. L represents the lap length between the front edge glue overflow guide part and the end of the front edge bonding angle 2 According to experience, the lap length L is 10-50 mm.

[0101] Based on the above-mentioned included angle α and length L q , the shape of the front edge glue blocking strip core material 7 can be determined, L represents the lap length the vertical length of the first skin, and the length of the horizontal side edge of the first skin serves as the reference for seeking the end point of the leading edge glue blocking strip.

[0102] Step 1.2.3, laying the base material of the leading edge glue blocking strip and the trailing edge glue blocking strip 9 respectively

[0103] Lay the base material of the leading edge glue blocking strip 4 so that the base material of the leading edge glue blocking strip 4 is partially overlapped on the installation site of the leading edge glue blocking strip 4 determined in step 1.2.1, and partially overlapped on the leading edge glue blocking strip core material 7; the shape of the leading edge glue blocking strip core material 7 can ensure that the part of the leading edge glue blocking strip base material overlapped on the second half skin base material forms an angle α with the part overlapped on the leading edge glue blocking strip core material 7;

[0104] The length of the leading edge glue blocking strip base material overlapped on the second half skin base material is 30-40mm, and the length of the leading edge glue blocking strip base material overlapped on the leading edge glue blocking strip core material 7 is also 30-40mm.

[0105] Lay the base material of the trailing edge glue blocking strip 9 so that the base material of the trailing edge glue blocking strip 9 is partially overlapped on the installation site B of the trailing edge glue blocking strip 9 determined in step 1.2.1.

[0106] The base material of the leading edge glue blocking strip and the trailing edge glue blocking strip 9 is biaxial cloth.

[0107] Step 1.2.4, placing the trailing edge glue blocking strip core material 10

[0108] Place the prefabricated trailing edge glue blocking strip core material 10 on the base material of the trailing edge glue blocking strip 9 laid at the installation site B of the trailing edge glue blocking strip 9 in step 1.2.3, and overlap the remaining part of the trailing edge glue blocking strip 9 base material on the trailing edge glue blocking strip core material 10; the shape of the trailing edge glue blocking strip core material 10 can ensure that the part of the trailing edge glue blocking strip 9 base material overlapped on the trailing edge glue blocking strip 9 installation site forms an angle β with the part overlapped on the trailing edge glue blocking strip core material 10;

[0109] The overall structure of the trailing edge glue blocking strip core material 10 is triangularly arranged, and the base is arranged to match the shape of the skin in the area adjacent to the trailing edge glue blocking strip 9 installation site B.

[0110] In the present application, the trailing edge glue blocking strip 9 has a required overlap length between the trailing edge glue overflow guide and the first skin trailing edge bonding area The overlap length is empirically valued at 10-50mm. The length of the trailing edge glue overflow guide is the overlap length At the same time, the first skin trailing edge bonding area and the second skin trailing edge bonding area have a required trailing edge bonding thickness Therefore, the height h of the end of the glue overflow guide part of the trailing edge relative to the second skin trailing edge bonding area b is:

[0111]

[0112] Δh b represents the gap between the glue overflow guide part of the trailing edge and the first skin trailing edge bonding area, and is 5-10 mm.

[0113] Therefore, for the trailing edge glue barrier strip core material 10, the overall structure is triangularly arranged (and is cut at the position corresponding to the included angle β to form an included angle cut edge 10-3 to facilitate the laying of the trailing edge glue barrier strip base material), the bottom edge is arranged to match the shape of the second skin bonding edge 10-1 of the second half skin in the area adjacent to the mounting site B of the trailing edge glue barrier strip 9; the two side edges connected with the bottom edge, one of which is arranged as a second glue barrier strip bonding edge 10-2, and the length is and the second glue barrier strip bonding edge 10-2 and the second skin bonding edge 10-1 form an included angle β, and the remaining side edge is arranged to be inclined, and the length is

[0114] The included angle β satisfies:

[0115]

[0116] Δh b represents the gap between the glue overflow guide part of the trailing edge and the first skin trailing edge bonding area, and is 5-10 mm; represents the trailing edge bonding thickness between the first skin trailing edge bonding area and the second skin trailing edge bonding area; represents the overlap length between the glue overflow guide part of the trailing edge and the first skin trailing edge bonding area, and is 10-50 mm;

[0117] The length of the second glue barrier strip bonding edge 10-2 satisfies:

[0118]

[0119] Knowing the overlap length and the included angle β, the structure of the trailing edge glue barrier strip core material 10 can be determined.

[0120] The leading edge and trailing edge glue barrier strip core materials 10 are both PVC foam structures, and are wrapped and sealed with non-porous release cloth and release cloth.

[0121] Step 1.2.5, covering the outside of the leading edge glue barrier strip base material, the leading edge glue barrier strip core material 7, the trailing edge glue barrier strip 9 base material, and the trailing edge glue barrier strip core material 10 with a vacuum film 8, and the two ends of the vacuum film 8 are overlapped on the second half skin base material;

[0122] Step 1.2.6, after vacuumizing, the whole is injection molded and cured;

[0123] Step 1.2.7, the front edge glue blocking strip core material 7 and the rear edge glue blocking strip core material 10 are cleaned, and the required front edge glue blocking strip and rear edge glue blocking strip 9 are obtained.

[0124] Step 2, the first and second half pieces of skin are combined

[0125] Step 2.1, after the skin product is injection molded and cured, the surface of the prefabricated second half piece of skin is cleaned.

[0126] Step 2.2, after the core filling block inside the front edge glue blocking strip and rear edge glue blocking strip 9 is removed, the formed front edge glue blocking strip and rear edge glue blocking strip 9 is cut by using a cutting machine to obtain the required front edge glue blocking strip and rear edge glue blocking strip 9;

[0127] The cutting method of the front edge glue blocking strip 4 is as follows: starting from the end of the formed front edge glue overflow guide part, the horizontal distance between the end of the formed front edge glue overflow guide part and the skin inner rib is measured point by point along the length extension direction of the formed front edge glue overflow guide part until the measured horizontal distance is consistent with the length of the horizontal side , and the position of the point is recorded; then the cutting machine is used for cutting, so that the horizontal distance between the end point of the cut front edge glue overflow guide part and the skin inner rib is consistent with the length of the horizontal side .

[0128] The cutting method of the rear edge glue blocking strip 9 is as follows: the length from the turning point of the formed rear edge glue blocking strip 9 to the end of the rear edge glue overflow guide part is measured along the length extension direction of the formed rear edge glue overflow guide part, and the position where the measured length is consistent with the lap length is marked down; then the cutting machine is used for cutting, so that the length from the end point of the cut front edge glue overflow guide part to the turning point of the rear edge glue blocking strip 9 is consistent with the lap length .

[0129] Step 2.3, the two half pieces of skin are combined by using a reversing mold to verify the front edge and rear edge bonding gap, and to confirm whether the front edge bonding angle can be inserted between the front edge glue blocking strip 4 and the second half piece of skin, and whether the lap length of the front edge glue blocking strip 4 and the end of the front edge bonding angle is the lap length whether the gap between the front edge glue blocking strip 4 and the end of the front edge bonding angle exceeds 20 mm, and whether the lap length between the rear edge glue blocking strip 9 and the bonding area of the first half piece of skin is the lap length ​Whether the gap between the trailing edge adhesive overflow guide portion and the first skin trailing edge bonding area exceeds the gap Δh b ;

[0130] Step 2.4, respectively, corresponding to the leading edge, trailing edge bonding angle respectively coated with the leading edge, trailing edge bonding glue, the leading edge, trailing edge bonding glue according to the design of the glue shape coating;

[0131] Step 2.5, using the flip mold to do the mold operation of two half skin, slowly down the upper part of the skin (ie, the first half of the skin), to insert the leading edge bonding angle coated with the leading edge bonding glue into the lower side of the leading edge glue blocking strip 4, continue to slowly down the upper part of the skin, the leading edge bonding glue from the gap between the leading edge glue blocking strip 4 and the end of the leading edge bonding angle extruded and accumulated between the leading edge glue blocking strip 4 and the end of the leading edge bonding angle, the trailing edge bonding glue from the gap between the trailing edge glue blocking strip 9 and the first skin trailing edge bonding area extruded and accumulated between the end of the trailing edge glue blocking strip 9 and the first skin trailing edge bonding area, then using the scraper to collect glue, so that the extruded leading edge bonding glue is respectively connected with the arc (the round angle is R20) between the leading edge glue blocking strip 4 and the end of the leading edge bonding angle, and the trailing edge bonding glue is respectively connected with the arc between the trailing edge glue blocking strip 9 and the first skin trailing edge bonding area, at the same time, the length of the extruded leading edge bonding glue on the leading edge glue blocking strip 4 from the gap between the leading edge glue blocking strip 4 and the end of the leading edge bonding angle is the overlap length The length of the trailing edge bonding glue on the trailing edge glue blocking strip 9 extruded from the gap between the trailing edge glue blocking strip 9 and the first skin trailing edge bonding area is the overlap length

[0132] Step 2.6, open the mold heating, the glue blocking strip together with the bonding glue and the product do the post curing, improve the blade TG value ≥75℃.

[0133] If positioning and bonding are adopted after the completion of the skin manufacturing, the following manufacturing method can be adopted:

[0134] (1) Surface cleaning: confirm the completion of the bonding surface repair, tear off the release cloth of the blocking strip to be bonded in the area to be bonded of the part to be bonded, and clean the dust and foreign matter.

[0135] (2) Time: it is required to be completed before trial molding, and the bonding can use WD3285 glue to glue at room temperature, and the room temperature curing time is 15-30 min. During the curing period, the blocking strip is prohibited from being stressed, and the blocking strip is checked and confirmed to be firmly bonded 10 min before trial molding or molding.

[0136] (3) Bonding area: the blocking strip uses WD3285 acrylic structural glue, and is fixed by point bonding at intervals of 400±100 mm. The point bonding bonding area is ≥50 mm*20, and the glue thickness does not exceed 5 mm. The glue thickness: according to the previously prepared mark line, bond the blocking strip, and press to ensure that the bonding thickness is ≤2 mm;

[0137] (4) Check the overflow of the adhesive, and remove the excess adhesive.

[0138] Through the pre-preparation or adhesive blocking strip provided by the application, when the blade is bonded, the excess adhesive can be squeezed out to the outside of the blade, reducing the excess adhesive squeezed out in the blade cavity. At the same time, the blocking strip is made of glass steel material, and the surface uses release cloth with rough adhesive surface, which has good adhesive effect when connected and adhered with the adhesive, can continuously ensure that the excess adhesive is connected firmly and will not fall off during the operation of the blade, and improves the quality of the blade. Moreover, the blocking strip made by the application has good formability, can completely match the skin bonding area profile, can effectively ensure the gap and positioning of the blocking strip, and when the bonding angle thickness is thin and deformation occurs during bonding, the blocking strip can play a slowing down role.

Claims

1. A method for sealing adhesive on wind turbine blades, capable of forming an adhesive sealing structure for wind turbine blades, characterized in that, The wind turbine blade adhesive blocking structure includes a leading edge blocking structure capable of preventing the leading edge adhesive filled in the leading edge part of the wind turbine blade from overflowing and a trailing edge blocking structure capable of preventing the trailing edge adhesive filled in the trailing edge part of the wind turbine blade from overflowing. The wind turbine blade leading edge includes a first half skin leading edge and a second half skin leading edge, the first half skin leading edge is provided with a leading edge bonding corner, and the first half skin leading edge and the second half skin leading edge are bonded into an integrated body by filling the leading edge bonding glue in the leading edge bonding corner; the leading edge blocking structure includes a leading edge blocking strip; characterized in that the leading edge blocking strip is overall L-shaped, is arranged at the front end of the leading edge adhesive overflow channel, can divert the leading edge adhesive overflow channel and reduce the flux of the leading edge adhesive overflow channel, and includes a leading edge blocking connecting part and a leading edge adhesive overflow guiding part which is connected to the leading edge blocking connecting part at an angle and the included angle α between the two is greater than 90°; The leading edge blocking connecting part is arranged at the bonding area edge position of the second half skin leading edge, and the leading edge adhesive overflow guiding part is adjacent to the end of the leading edge bonding corner, and meanwhile, the leading edge adhesive overflow guiding part and the end of the leading edge bonding corner have a gap A suitable for the overflow of the leading edge bonding glue, so that when the first half skin leading edge and the second half skin leading edge are combined, the excess leading edge bonding glue can be extruded through the gap A, and the leading edge adhesive overflow guiding part, the end of the leading edge bonding corner and the bonding area of the second half skin leading edge are bonded into an integrated body by the leading edge bonding glue; The trailing edge blocking structure includes a trailing edge blocking strip; the trailing edge of the wind turbine blade includes a first half skin trailing edge and a second half skin trailing edge, the first half skin trailing edge is provided with a trailing edge bonding corner, and the first half skin trailing edge and the second half skin trailing edge are bonded into an integrated body by filling the trailing edge bonding glue in the trailing edge bonding corner; The trailing edge blocking strip is overall V-shaped, is arranged at the front end of the trailing edge adhesive overflow channel, can divert the trailing edge adhesive overflow channel and reduce the flux of the trailing edge adhesive overflow channel, and includes a trailing edge blocking connecting part and a trailing edge adhesive overflow guiding part which is connected to the trailing edge blocking connecting part at an angle and the included angle β between the two is less than 90°, the trailing edge blocking connecting part is arranged at the bonding area edge position of the second half skin trailing edge, and the trailing edge adhesive overflow guiding part is adjacent to the end of the first half skin trailing edge, and meanwhile, the trailing edge adhesive overflow guiding part and the first half skin trailing edge have a gap B suitable for the overflow of the trailing edge bonding glue, so that when the first half skin trailing edge and the second half skin trailing edge are combined, the excess trailing edge bonding glue can be extruded through the gap B, and the first half skin trailing edge, the bonding area of the second half skin trailing edge and the trailing edge adhesive overflow guiding part are bonded into an integrated body by the trailing edge bonding glue; The wind turbine blade adhesive blocking method specifically includes the following steps: Step one, respectively forming first and second half skins Step 1.1, pre-forming the first half skin, and the leading edge and the trailing edge of the formed first half skin are respectively integrally formed with a leading edge bonding corner and a trailing edge bonding corner; Step 1.2, preform the second half of the profiled skin, the profiled second half of the skin is integrally formed with a front edge, rear edge glue blocking strip corresponding to the edge position of the front edge, rear edge bonding area respectively; Step two, the first and second half of the skin is closed Step 2.1, after the skin product is poured and cured, the surface of the preformed second half of the skin is cleaned; Step 2.2, after the core material filling block inside the front edge and rear edge glue blocking strip is taken out, the profiled front edge and rear edge glue blocking strip is cut by using the cutting machine to obtain the required front edge and rear edge glue blocking strip; Step 2.

3. Trial assembly of the two half skins using the reverse mold to verify the bonding gap of the leading edge and the trailing edge, and to confirm whether the leading edge bonding angle can be inserted between the leading edge glue blocking strip and the second half skin, and whether the overlap length of the leading edge glue blocking strip and the end of the leading edge bonding angle is the preset overlap length whether the gap between the end of the leading edge glue blocking strip and the leading edge bonding angle exceeds 20 mm, and whether the overlap length between the trailing edge glue blocking strip and the bonding area of the first half skin is the preset overlap length whether the gap between the trailing edge glue blocking overflow guide and the bonding area of the first skin trailing edge exceeds the preset gap Ah b ; Step 2.4, apply adhesive on the front edge and rear edge bonding angle, and the adhesive is applied according to the designed glue shape; Step 2.5, using the flip mold to do the two half pieces of skin operation, slowly down the first half piece of skin, to insert the front edge bonding angle coated with front edge adhesive into the lower side of the front edge adhesive strip, continue to slowly down the upper part of the skin, the front edge adhesive is extruded from the gap between the front edge adhesive strip and the end of the front edge bonding angle and accumulated between the front edge adhesive strip and the end of the front edge bonding angle, the rear edge adhesive is extruded from the gap between the rear edge adhesive strip and the first skin rear edge bonding area and accumulated between the end of the rear edge adhesive strip and the first skin rear edge bonding area, then use the scraper to collect glue, so that the extruded front edge adhesive is respectively connected with the arc transition between the front edge adhesive strip and the end of the front edge bonding angle, and the rear edge adhesive is respectively connected with the arc transition between the rear edge adhesive strip and the first skin rear edge bonding area; At the same time, the length of the front edge adhesive extruded from the gap between the front edge adhesive strip and the end of the front edge bonding angle on the front edge adhesive strip is the lap length The length of the rear edge adhesive extruded from the gap between the rear edge adhesive strip and the first skin rear edge bonding area on the rear edge adhesive strip is the lap length Step 2.6, open the mold heating, the glue blocking strip and the adhesive together with the product do the post curing, improve the blade TG value≥75℃.

2. A method according to claim 1, wherein, The specific process of integrally forming the front edge glue blocking strip on the second half of the skin includes the following steps: Step 1.2.1, scribe positioning In the front edge bonding area of the second half of the skin base material, according to the preset front edge glue blocking strip bonding width, the installation site A of the front edge glue blocking strip is positioned by scribing close to the edge position of the front edge bonding area of the second half of the skin base material; The installation site A of the front edge glue blocking strip is the turning point of the front edge glue blocking strip; Step 1.2.2, place the front edge glue blocking strip core material Place the preformed front edge glue blocking strip core material along the front edge glue blocking strip installation site determined in step 1.2.1 on the second half of the skin base material in the direction of the prism; The front edge glue blocking strip core material is triangular as a whole, the bottom edge is arranged as a first skin fitting edge matched with the shape of the second half skin base material at the arranged position, two side edges connected with the bottom edge, one of the side edges is arranged as a first glue blocking strip fitting edge, the length is L q , and the first glue blocking strip fitting edge and the first skin fitting edge form an included angle α, and the remaining side edge is horizontally arranged, and the length is Lp; The value of the included angle α satisfies: The length L of the front edge adhesive overflow guide of the front edge adhesive strip q satisfies: wherein: Δh represents the distance of the end of the leading edge bond angle relative to the second skin leading edge bond region; q Δg is the gap between the end of the leading edge bond angle and the first skin leading edge bond region; L represents the overlap length between the leading edge bond spill guide and the end of the leading edge bond angle; Step 1.2.3, lay the base material of the front edge glue blocking strip Lay the base material of the front edge glue blocking strip, so that the base material of the front edge glue blocking strip is partially overlapped on the installation site of the front edge glue blocking strip determined in step 1.2.1, and partially overlapped on the front edge glue blocking strip core material; The shape of the front edge glue blocking strip core material can ensure that the part of the front edge glue blocking strip base material overlapped on the second half of the skin base material and the part overlapped on the front edge glue blocking strip core material form an included angle α; Step 1.2.4, cover the vacuum film outside the front edge glue blocking strip base material and the front edge glue blocking strip core material, and the two ends of the vacuum film are overlapped on the second half of the skin base material; Step 1.2.5, after vacuumizing, whole pouring forming, curing; Step 1.2.6, clean the front edge glue blocking strip core material, and the required front edge glue blocking strip can be obtained.

3. The method for sealing the adhesive on wind turbine blades according to claim 2, characterized in that, The specific process of integrally forming the rear edge glue blocking strip on the second half of the skin includes the following steps: Step 1.2.a, scribe positioning In the rear edge bonding area of the second half of the skin base material, according to the preset rear edge glue blocking strip bonding width, the installation site B of the rear edge glue blocking strip is positioned by scribing close to the edge position of the rear edge bonding area of the second half of the skin base material; The installation site B of the rear edge glue blocking strip is the turning point of the rear edge glue blocking strip; Step 1.2.b, lay the base material of the rear edge glue blocking strip Lay the base material of the rear edge glue blocking strip, so that the base material of the rear edge glue blocking strip is partially overlapped on the installation site B of the rear edge glue blocking strip determined in step 1.2.1; Step 1.2.c, place the rear edge glue blocking strip core material In step 1.2.b, the pre-prepared rear edge adhesive strip core material is placed on the rear edge adhesive strip base material laid at the rear edge adhesive strip installation site B, and the remaining part of the rear edge adhesive strip base material is overlapped on the rear edge adhesive strip core material, and the shape of the rear edge adhesive strip core material is capable of enabling the part of the rear edge adhesive strip base material overlapped on the rear edge adhesive strip installation site to form an included angle β with the part overlapped on the rear edge adhesive strip core material; The overall structure of the rear edge rubber blocking strip core material is triangular, the bottom edge is arranged to match the shape of the second skin in the adjacent area of the rear edge rubber blocking strip mounting site B; two side edges are connected with the bottom edge, one of the side edges is arranged as a second rubber blocking strip matching edge, and the length is The second rubber blocking strip matching edge and the second skin matching edge form an included angle β, and the remaining side edge is arranged to be inclined, and the length is The included angle β satisfies: wherein: Δh b represents the gap between the trailing edge adhesive overflow guide and the first skin trailing edge bonding area, and has a value of 5-10 mm; represents the trailing edge bonding thickness between the first skin trailing edge bonding area and the second skin trailing edge bonding area; represents the overlap length between the trailing edge adhesive overflow guide and the first skin trailing edge bonding area, and has a value of 10-50 mm; The length of the second adhesive strip fitting edge satisfies: Step 1.2.d, covering the outer side of the rear edge adhesive strip base material and the rear edge adhesive strip core material with a vacuum film, and the two ends of the vacuum film are overlapped on the second half skin base material; Step 1.2.e, after vacuumizing, the whole is injection molded and cured; Step 1.2.f, the rear edge adhesive strip core material is cleaned, and the required rear edge adhesive strip is obtained.

4. The method of claim 2, wherein the method further comprises: The base materials of the front and rear edge adhesive strips are both biaxial cloth; the front and rear edge adhesive strip core materials are both PVC foam structures, and are wrapped and sealed with non-porous release cloth and release cloth.

5. The method of claim 2, wherein the method further comprises: The positioning line of the front edge adhesive strip = the bonding width of the front edge adhesive strip + 30 ± 20, and the positioning line of the rear edge adhesive strip = the bonding width of the rear edge adhesive strip + 30 ± 20, unit: mm.

6. The method of claim 2, wherein, In step 1.2.4, the length of the front edge adhesive strip base material overlapped on the second half skin base material is 30-40 mm, and the length overlapped on the front edge adhesive strip core material is also 30-40 mm.

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