Forming jig for three-dimensional curved surface hard film material

Abstract

The utility model discloses a forming jig for a three-dimensional curved surface hard film material, which comprises an upper die assembly, a plurality of elastic support structures, a plurality of guide positioning structures and a lower die assembly, the lower die assembly comprises a lower die holder and a lower die fitting part mounted on the lower die holder, a lower die three-dimensional concave part is arranged in the middle of the lower die fitting part, and a lower die three-dimensional concave part is arranged in the middle of the lower die fitting part. The upper die assembly comprises an upper die base and an upper die attaching part installed on the upper die base, an upper die three-dimensional protruding part is arranged in the middle of the upper die attaching part, the lower die attaching part and the upper die attaching part are the same in shape, and the lower ends of the elastic supporting structures and the lower ends of the guiding and positioning structures are fixed to the lower die base. The upper ends of the elastic supporting structures and the upper ends of the guiding and positioning structures are detachably connected to the upper die base. According to the forming jig provided by the utility model, the formed hard film material can be obtained, so that the subsequent injection molding process can be carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to in-mold insert injection molding technical field especially relates to a kind of forming fixture for three-dimensional curved surface hard film material. BACKGROUND

[0002] The injection molding structure of the existing IML (In Molding Label, in-mold insert injection molding) process is generally planar or single curved surface, so only the planar raw material (PC film sheet, etc.) needs to be cut to obtain the required substrate shape. For multi-curved surface structure substrates, not only the raw material needs to be cut, but also the raw material needs to be bent and formed. Therefore, a hard film material needs to be introduced for the forming process.

[0003] The existing film material forming is mainly prepared by a film pasting device. The film material is pasted on a film covering plate, the upper plate presses the edge (acupoint edge position), the lower cavity air expands after being heated, and the film material softens and swells; after the film material is sufficiently softened, the lower cavity is vacuumized, the air cylinder pushes the clamp to eject, the upper cavity is given a strong air pressure, so that the film material is completely pasted with the product and the clamp without wrinkles, bubbles and other defects.

[0004] However, since the coverage area of the film material can only be smaller than the acupoint length and width, and the device acupoint length and width size is constant, it can only be applied to a certain size of product film pasting. Large-size film pasting verification equipment can only be redesigned. In addition, since the film material has no adhesion, it cannot be pasted on the jig. At the same time, the stress of the film material after forming will not be released quickly. Therefore, when the film material is formed, the upper air pressure is cancelled, the film material will rebound and deform, and the required substrate shape cannot be obtained. Further, after the film material is stretched and deformed, wrinkles, bubbles and other defects will appear at the edge. In order to eliminate these defects, the film material coverage area is often increased, so that the defects appear in the part that needs to be cut off outside the product surface. This makes the film pasting waste material more, and the film material utilization rate is low.

[0005] Therefore, a new solution is needed. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a forming jig for three-dimensional curved surface hard film material.

[0007] To achieve the above object, the utility model provides a forming jig for three -dimensional curved surface hard film material, including upper die assembly, a plurality of elastic support structure, a plurality of guide positioning structure and lower die assembly, the lower die assembly includes lower die base and installs the lower die lamination of lower die base, the middle part of lower die lamination is provided with lower die three -dimensional recess, the upper die assembly includes upper die base and installs the upper die lamination of upper die base, the middle part of upper die lamination is provided with upper die three -dimensional convex, the shape of lower die lamination with upper die lamination is same, the lower end of a plurality of elastic support structure with the lower end of a plurality of guide positioning structure is fixed on lower die base respectively, the upper end of a plurality of elastic support structure with the upper end of a plurality of guide positioning structure is detachable connected to upper die base respectively.

[0008] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, the lower die base is provided with a plurality of guide positioning mounting portions in a protruding manner, the guide positioning structure is a circular truncated cone structure with diameters decreasing from bottom to top and includes an integrally formed positioning portion and a guide portion, and the positioning portion is mounted in the guide positioning mounting portion.

[0009] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, the upper die assembly further includes a plurality of linear bearings fixed on the upper die base, and the guide portion is mounted in the linear bearings.

[0010] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, the elastic support structure includes a screw gasket, a spring sliding block, a spring limiting column and a spring, the spring is sleeved on the outer surface of the spring limiting column, the spring sliding block is fixed on the upper end of the spring limiting column, and the screw gasket is mounted on the spring sliding block.

[0011] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, a plurality of support structure mounting holes are formed in the lower die base, and the lower end of the spring limiting column is fixed in the support structure mounting hole.

[0012] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, a plurality of support structure limiting grooves are formed in the edge of the upper die base, and the upper end of the spring limiting column penetrates through the support structure limiting groove.

[0013] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, the upper die three -dimensional convex and the lower die three -dimensional recess are hollow.

[0014] In the forming jig for three -dimensional curved surface hard film material provided by the utility model, the upper die assembly further includes a plurality of reinforcing ribs mounted on the upper die base and arranged opposite to the upper die lamination.

[0015] The forming jig for the three-dimensional curved hard film material further comprises a plurality of mold closing limiting assemblies mounted on the lower mold base, and the mold closing limiting assembly comprises an adjusting block and a stainless steel gasket.

[0016] In the forming jig for the three-dimensional curved hard film material, the three-dimensional recess of the lower mold comprises a clearance area and a fitting area, and the clearance area is not in contact with the film material.

[0017] The forming jig for the three-dimensional curved hard film material has the following beneficial effects: the upper mold assembly is positioned accurately and smoothly by being tightly fitted with four linear bearings; the clearance design facilitates taking and placing; the reinforcing rib not only enhances the structural stability, but also increases the heating area of the upper mold assembly, making it easier to heat; the upper-narrow-and-lower-wide design of the guide positioning structure takes into account the characteristics of smooth guidance and accurate mold closing positioning, solving the problem of frequent mold jamming during accurate positioning; the lower mold assembly is designed with a clearance area, so that the flange area of the film material is in a compressed state after mold closing, and the three-dimensional area fits the three-dimensional convex part of the upper mold, but does not contact the clearance area of the three-dimensional recess of the lower mold, solving the problems of flange wrinkles and three-dimensional area creases; by increasing the adjusting block and adding or subtracting standard gaskets below the adjusting block, the mold closing gap can be adjusted, and the thickness of the formed film material can be controlled; during use, first, a single curved film piece that fits the mold is obtained by one-time bending, and then the film piece is formed by secondary compression, making the deformation of the film material more uniform, the thickness of the fitted film piece more uniform, and the problem of film material thinning and breaking reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings:

[0019] Figure 1 Fig. 1 is a structural schematic view of a forming jig for a three-dimensional curved hard film material according to an embodiment of the present application;

[0020] Figure 2 Fig. 2 is a structural schematic view of a lower mold assembly of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application;

[0021] Figure 3 Fig. 3 is a structural schematic view of the lower mold assembly of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application, in which a resilient support structure and a guide positioning structure are installed;

[0022] Figure 4 Fig. 1 shows a structure schematic view of a front face of an upper mold assembly of a forming jig for a three-dimensional curved hard film material according to an embodiment of the present application;

[0023] Figure 5 Fig. 2 shows a structure schematic view of a back face of the upper mold assembly of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application;

[0024] Figure 6 Fig. 3 shows a cross-sectional view of a left view of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application;

[0025] Figure 7 Fig. 4 shows a structure schematic view of a lower mold assembly of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application, wherein a mold closing limiting assembly is installed;

[0026] Figure 8 Fig. 5 shows a cross-sectional view of the lower mold assembly of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application;

[0027] Figure 9 Fig. 6 shows a process schematic view of an operation of the forming jig for the three-dimensional curved hard film material according to the embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings show typical embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0030] Figure 1 Fig. 1 shows a structure schematic view of a front face of an upper mold assembly of a forming jig for a three-dimensional curved hard film material according to an embodiment of the present application; Figure 1As shown, the present invention provides a forming jig for three-dimensional curved hard film materials, comprising an upper mold assembly 10, multiple elastic support structures 20, multiple guide positioning structures 30 and a lower mold assembly 40. The lower ends of the multiple elastic support structures 20 and the lower ends of the multiple guide positioning structures 30 are respectively fixed to the lower mold assembly 40, and the upper ends of the multiple elastic support structures 20 and the upper ends of the multiple guide positioning structures 30 are respectively detachably connected to the upper mold assembly 10. Figure 9 As shown, the flat membrane material is bent into a single-sided curved membrane material; then, the four corners of the single-sided curved membrane material are glued and fixed to the lower mold assembly, and the upper mold assembly is covered; the whole is heated to 200°C and kept warm until the membrane material softens; then, the upper mold assembly is pressed to close the mold, and the pressure is maintained and cooled to room temperature; the formed membrane material is taken out and the shape is laser cut.

[0031] Figure 2 Shown is a structural schematic diagram of a lower mold assembly of a molding jig for three-dimensional curved hard membrane materials provided by one embodiment of the present invention. Figure 5 The figure shows the back side of the upper mold assembly of the molding jig for three-dimensional curved hard film material provided by one embodiment of the present invention. Figure 2 As shown, the lower mold assembly 40 includes a lower mold base 41 and a lower mold fitting portion 42 mounted on the lower mold base 41, and a lower mold three-dimensional concave portion 421 is provided in the middle of the lower mold fitting portion 42. Figure 5 As shown, the upper mold assembly 10 includes an upper mold base 11 and an upper mold fitting portion 12 mounted on the upper mold base 11. The middle part of the upper mold fitting portion 12 is provided with an upper mold three-dimensional protrusion 121, and the lower mold fitting portion 42 has the same shape as the upper mold fitting portion 12. When in use, the bent single-sided curved membrane material is placed on the lower mold fitting portion, and then the upper mold assembly is covered so that the other side of the single-sided curved membrane material contacts the upper mold fitting portion. The bent portion is adapted to the shape of the lower mold three-dimensional concave portion and the upper mold three-dimensional protrusion to facilitate the mold closing operation. Furthermore, in order to reduce the overall weight, the upper mold three-dimensional protrusion 121 and the lower mold three-dimensional concave portion 421 are hollow.

[0032] like Figure 1 As shown, the elastic support structure 20 includes a screw washer 210, a spring sliding block 220, a spring limiting column 230 and a spring 240. The spring 240 is sleeved on the outer surface of the spring limiting column 230. The spring sliding block 220 is fixed to the upper end of the spring limiting column 230. The screw washer 210 is installed on the spring sliding block 220. Figure 3 As shown, a plurality of support structure mounting holes 420 are provided on the lower die base 41, and the lower ends of the spring limit columns 230 are fixed in the support structure mounting holes 420. Figure 5As shown in the figure, the edge of the upper die base 11 is provided with a plurality of support structure limiting grooves 120, and the upper end of the spring limiting column 230 penetrates through the support structure limiting groove 120. The elastic support structure provides a stable elastic force for placing the upper die assembly to offset the gravity of the upper die assembly, so that the upper die assembly is always not in contact with the film material without external force. In use, the upper die assembly is pressed, the spring is contracted, and the upper die assembly is in contact with the film material and the lower die assembly to realize the mold closing.

[0033] Figure 6 As shown in the figure, the upper die assembly 10 provided by the utility model is used for the forming jig of the three-dimensional curved hard film material. Figure 6 As shown in the figure, the guide positioning structure 30 is a circular truncated cone structure with a diameter decreasing from bottom to top, and comprises an integral positioning part 310 and a guide part 320. The upper die assembly 10 comprises a plurality of linear bearings 13 fixed on the upper die base 11, and the guide part 320 is installed in the linear bearing 13. By making the upper part of the guide positioning structure into a long taper structure, that is, adopting a structure with a narrow upper part and a wide lower part, the influence of the enlarged hole shaft perpendicularity on the assembly precision can be prevented due to the too long guide positioning structure, and the mold clamping can be avoided.

[0034] Figure 3 As shown in the figure, the lower die assembly of the forming jig for the three-dimensional curved hard film material is provided by the utility model, wherein the elastic support structure and the guide positioning structure are installed. As shown in the figure, Figure 3 As shown in the figure, the lower die base 41 is provided with a plurality of guide positioning installation parts 410, and the positioning part 310 is installed in the guide positioning installation part 410. The guide positioning structure is positioned and installed on the lower die assembly, and the precise positioning effect can be realized. The positioning part 310 and the guide positioning installation part 410 have a very small gap, and the guide positioning installation part 410 has a very small perpendicularity when the lower die surface is processed. When the guide positioning structure is very short, these influences can be ignored; when the guide positioning structure is very long, these small deviations are enlarged, so that the top gap deviation of the installed guide positioning structure is large, and the guide part 320 cannot be installed in the linear bearing 13 or is too tight to slide. Therefore, in the utility model, the positioning part 310 only retains a 10mm transition fit positioning, so as to ensure the precise mold closing positioning and the uniform thickness of the film material after pressing; and the guide part 320 is designed to have a small taper structure, so as to ensure the smooth guiding and prevent the mold clamping. The guide positioning structure has the characteristics of smooth guiding and precise mold closing positioning, and solves the problem of frequent mold clamping of the precise positioning guide.

[0035] Figure 4 As shown in the figure, the upper die assembly of the forming jig for the three-dimensional curved hard film material is provided by the utility model. Figure 4As shown, the upper die assembly 10 further comprises a plurality of reinforcing ribs 14 mounted on the upper die seat 11 and arranged opposite to the upper die matching part 12. For the convenience of taking and placing, the upper die assembly is designed to be lightened and hollowed, that is, the upper die three-dimensional convex part 121 of the upper die matching part 12 is designed to be hollowed, which results in that the thin wall has very low strength, and therefore, the strength can be ensured by increasing the reinforcing ribs; meanwhile, the heating mode of the upper die assembly is heat radiation heating, and the reinforcing ribs increase the surface area of the upper die assembly, so that the temperature rise can be accelerated.

[0036] Figure 7 As shown in the structural schematic view of the lower die assembly of the forming jig for the three-dimensional curved hard film material provided by the embodiment of the present application, a mold clamping limiting assembly is mounted. Figure 7 As shown, the forming jig for the three-dimensional curved hard film material provided by the present application further comprises a plurality of mold clamping limiting assemblies 50 mounted on the lower die seat 41, and the mold clamping limiting assembly 50 comprises an adjusting block 510 and a stainless steel gasket. By increasing the standard stainless steel gasket, different mold clamping gaps can be adjusted. By connecting the adjusting block of precise thickness at the four corner positions of the lower die assembly and adjusting the mold clamping gap by the way of the bottom gasket of the standard stainless steel gasket, the precision is determined by the thickness of the gasket, and the highest precision can reach 5um. By increasing the adjusting block and adding or subtracting the standard gasket below the adjusting block, the mold clamping gap can be adjusted, and then the thickness of the film material after forming can be controlled.

[0037] Figure 8 As shown in the sectional view of the lower die assembly of the forming jig for the three-dimensional curved hard film material provided by the embodiment of the present application, the flange area of the film material is in a pressed state after mold clamping, and the three-dimensional area matching adopts the upper die three-dimensional convex part 121 and the lower die three-dimensional concave part 421 which are designed to be avoided. After the upper and lower dies are clamped, the corresponding positions of the upper and lower dies of the jig have some places with a die pulling angle close to 0 degrees. During the mold clamping process, the film material at these positions is equivalent to shearing motion, which is extremely easy to cause pulling and cracking, and large scraping at the inflection point is easy to cause wrinkles, damage and other defects. The upper die assembly needs to be pressed to form, so the structure cannot be changed and only the area where the die pulling slope of the lower die assembly is too small can be avoided. Therefore, in order to solve the problems of flange wrinkles and three-dimensional area folds, a small area avoidance design is adopted at the inflection point of the flange bending structure, that is, the lower die three-dimensional concave part 421 comprises an avoidance area 4211 and a matching area 4212, and the avoidance area is not in contact with the film material.

[0038] Further, the test shows that if the four straight angles of the fixed film material are pressed after being fixed, the film material is stretched unevenly, the film material is thinned too much at a certain position, and the film material is even pulled apart, so that the two ends of the three-dimensional surface in the length direction are prone to cracking. If the film material is not fixed and directly pressed, because the film material is placed freely, there is no film material stretching and extension during the pressing process, and the film material after the wrinkle is formed is equivalent to two or three laminates, and the thickness is superimposed to prevent the upper and lower molds from being completely closed, resulting in a contour NG, and the film material cannot be completely formed. Therefore, as shown in the utility model, firstly, a single curved film piece that is relatively close to the mold is obtained through one-time bending, and then the film piece is formed through secondary pressing by using the forming jig for three-dimensional curved hard film material provided in the utility model. Figure 9 Compared with direct pressing, the secondary bonding can make the film material deform more uniformly, and the thickness of the film piece after bonding is more uniform, thereby reducing the problem of film material thinning and damage.

[0039] The upper mold assembly is positioned accurately and smoothly by being tightly fitted with four linear bearings; the weight reduction and avoidance design facilitates taking and placing; and the reinforcing ribs not only strengthen the structural stability, but also increase the heating area of the upper mold assembly, so that the upper mold assembly is more easily heated. The guiding and positioning structure adopts a design of being narrow at the top and wide at the bottom, which takes into account the characteristics of smooth guiding and accurate mold closing positioning, and solves the problem of frequent mold jamming during accurate positioning and guiding. The lower mold assembly is designed with an avoidance area, so that the flange area of the film material after mold closing is in a pressed state, and the three-dimensional area is bonded to the three-dimensional convex part of the upper mold, but does not contact the avoidance area of the three-dimensional concave part of the lower mold, thereby solving the problems of flange wrinkles and three-dimensional area creases. By increasing the adjusting block and adding or subtracting standard shims below the adjusting block, the mold closing gap can be adjusted, and the thickness of the film material after forming can be controlled. In use, firstly, a single curved film piece that is relatively close to the mold is obtained through one-time bending, and then the film piece is formed through secondary pressing, so that the film material deforms more uniformly, the thickness of the film piece after bonding is more uniform, and the problem of film material thinning and damage is reduced.

[0040] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail, so as not to obscure the understanding of the specification.

[0041] Similarly, it is to be understood that the embodiments of the application can include hardwired and / or program modules and that the various embodiments of the application can be implemented by computer, hardware, software, firmware, middleware, microcode and / or any combination of the above. To clearly illustrate this interchangeability of hardware and software, various embodiments are described based on functions performed through both hardware and software.

[0042] Moreover, it will be understood that, although the terms "first" and "second", etc. can be used herein to describe various elements or steps, these elements are only called by these terms for the purpose of distinguishing one element or step from another element or step. It should be understood that one element or step can be called by different names, and that such names would not affect the meaning of the description or any element or step. Terms such as "first", "second", "third", etc. are used to distinguish different elements or steps from one another, and are not used to designate a particular order or sequence of elements or steps. It will be understood that the terms "first", "second", "third", etc. can be used to describe different elements or steps in different embodiments.

[0043] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that one skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices or means can be listed, comprising means for performing a certain task. The use of the term "means" in a claim is intended to cover one or more elements performing the function recited in the claim. The word "each" preceding the enumeration of elements or steps in a claim does not exclude the presence of additional such elements or steps. The use of the term "first", "second" and the like in the description corresponding to a claim does not imply any order or sequence. The terms "first", "second", "third", etc. are used to distinguish different elements or steps from one another and are not used to designate a particular order or sequence of elements or steps. It will be understood that the terms "first", "second", "third", etc. can be used to describe different elements or steps in different embodiments.

Claims

1. A forming jig for three-dimensional curved hard membrane material, characterized in that: The invention comprises an upper mold assembly (10), a plurality of elastic support structures (20), a plurality of guide positioning structures (30) and a lower mold assembly (40), wherein the lower mold assembly (40) comprises a lower mold base (41) and a lower mold fitting portion (42) mounted on the lower mold base (41), a lower mold three-dimensional recess (421) is provided in the middle of the lower mold fitting portion (42), and the upper mold assembly (10) comprises an upper mold base (11) and an upper mold fitting portion (12) mounted on the upper mold base (11). A three-dimensional upper mold protrusion (121) is provided in the middle of the upper mold fitting portion (12); the lower mold fitting portion (42) has the same shape as the upper mold fitting portion (12); the lower ends of the multiple elastic support structures (20) and the lower ends of the multiple guide positioning structures (30) are respectively fixed on the lower mold base (41); the upper ends of the multiple elastic support structures (20) and the upper ends of the multiple guide positioning structures (30) are respectively detachably connected to the upper mold base (11).

2. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: A plurality of guide positioning mounting portions (410) are convexly provided on the lower die base (41); the guide positioning structure (30) is a truncated cone structure with a diameter decreasing from bottom to top and comprises an integrally formed positioning portion (310) and a guide portion (320); the positioning portion (310) is mounted in the guide positioning mounting portion (410).

3. The forming jig for three-dimensional curved hard membrane material according to claim 2, characterized in that: The upper die assembly (10) further comprises a plurality of linear bearings (13) fixed on the upper die base (11), and the guide portion (320) is installed in the linear bearings (13).

4. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: The elastic support structure (20) comprises a screw washer (210), a spring sliding block (220), a spring limiting column (230) and a spring (240), wherein the spring (240) is sleeved on the outer surface of the spring limiting column (230), the spring sliding block (220) is fixed to the upper end of the spring limiting column (230), and the screw washer (210) is mounted on the spring sliding block (220).

5. The forming jig for three-dimensional curved hard membrane material according to claim 4, characterized in that: The lower die base (41) is provided with a plurality of support structure mounting holes (420), and the lower ends of the spring limiting columns (230) are fixed in the support structure mounting holes (420).

6. The forming jig for three-dimensional curved hard membrane material according to claim 4, characterized in that: A plurality of support structure limiting grooves (120) are provided on the edge of the upper die seat (11), and the upper end of the spring limiting column (230) passes through the support structure limiting groove (120).

7. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: The upper mold three-dimensional convex portion (121) and the lower mold three-dimensional concave portion (421) are hollow.

8. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: The upper mold assembly (10) further comprises a plurality of reinforcing ribs (14) mounted on the upper mold base (11) and arranged opposite to the upper mold fitting portion (12).

9. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: It also includes a plurality of mold closing and limiting assemblies (50) installed on the lower mold base (41), and the mold closing and limiting assemblies (50) include adjustment blocks (510) and stainless steel gaskets.

10. The forming jig for three-dimensional curved hard membrane material according to claim 1, characterized in that: The three-dimensional concave portion (421) of the lower mold includes a space-avoiding area (4211) and a fitting area (4222), and the space-avoiding area (4211) does not contact the film material.

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