3D mold pressing edge sealing process, 3D mold pressing mold and application of 3D mold pressing mold
By using 3D molding edge sealing technology and molds, the problem of low processing accuracy of precision 3D stereoscopic products in existing molding processes has been solved, and efficient production of 3D stereoscopic products without the need for subsequent edge sealing has been achieved.
Patent Information
- Application Number
- CN202511524061.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2025-12-30
AI Technical Summary
In existing compression molding processes, the molded products require subsequent sewing and edge sealing processes, and it is impossible to process 3D three-dimensional products with precise structures, resulting in low processing accuracy.
The 3D molding and edge sealing process is adopted. By cutting multiple layers of materials to form a composite material, positioning holes are punched around its edges. The anti-slip part and the positioning part cooperate with the molding die to form a 3D three-dimensional structure, avoiding subsequent sewing and edge sealing, and improving molding accuracy and efficiency.
It eliminates the need for subsequent edge sealing processes, improves the processing accuracy and efficiency of 3D products, makes the products less prone to deformation, and ensures that the edges are three-dimensional and flat, making it suitable for the production of 3D masks, molded cups, and other products.
Smart Images
Figure CN121224104A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of three-dimensional molding processes, and in particular to a 3D molding edge sealing process, a 3D molding die, and its applications. Background Technology
[0002] Compression molding is a process that uses a mold to apply high temperature and pressure to materials, causing physical or chemical changes in the materials and ultimately forming a product that conforms to the mold cavity. Compression molding can process products with specific shapes and sizes, and has the advantages of high product quality, high production efficiency, and the ability to process large and complex products. It is widely used in the processing of industrial products and daily necessities.
[0003] In the manufacture of textile fiber products for daily necessities, such as masks and underwear cups, molding is a common processing technology. Molding can be used to mold the shapes of masks and underwear cups. Existing molding processes mainly include two types: The first is step-by-step molding, which involves multiple molding processes according to the layer structure of the product to be molded. This method is relatively cumbersome and has low processing efficiency. The second is one-piece molding, which uses a lower mold with a convex structure and an upper mold with a concave structure. A hollow reset plate is set on the lower mold, and a corresponding hollow clamping plate is set on the upper mold. During molding, the composite fabric is first laid flat on the reset plate. As the upper mold presses down, the clamping plate first abuts against the reset plate to compress the fabric. Then, the upper mold continues to press down, and the reset plate is pressed down along with the upper mold. Finally, the upper and lower molds close, molding the product into its shape.
[0004] While the aforementioned integrated molding process improves processing efficiency, the molded products still require subsequent processes such as sewing and edge sealing. Furthermore, for products with complex layered structures and shapes, it is impossible to process 3D products with precise structures, and the processing accuracy is relatively low. Summary of the Invention
[0005] To address the issues that existing one-piece molding processes require subsequent sewing and edge sealing after molding, and that for products with complex layered structures and shapes, it is impossible to process 3D products with precise structures and low processing accuracy, this application provides a 3D molding edge sealing process, a 3D molding mold, and its application.
[0006] Firstly, this application provides a 3D molding edge sealing process, which adopts the following technical solution: A 3D molding edge sealing process includes the following steps: S1. Cut and stack the multi-layered materials according to the required product structure to obtain a composite material; S2. Several spaced positioning holes are punched out at the four edges of the composite material; S3. Place the composite material in the lower mold of the molding die. The positioning area of the periphery of the composite material is positioned and matched with the positioning part provided on the periphery of the top of the lower mold. The top of the positioning part is provided with an anti-slip part, and the positioning area of the composite material is placed on the top of the anti-slip part. S4. Drive the upper mold of the molding die to move downward. The positioning mold of the molding die first abuts against the positioning area of the composite material, pressing the positioning area to form a 3D three-dimensional shape. Then the upper mold of the molding die continues to move downward. The molding punch of the upper mold and the molding cavity of the lower mold cooperate to perform molding and forming a composite material with an overall 3D three-dimensional structure. In step S4, during compression molding, the first cutting and molding part of the upper mold and the second molding and cutting part of the lower mold are positioned and matched to form a cutting area with a 3D three-dimensional shape on the inner side of the composite fabric near the positioning area. The first sealing part of the upper mold and the second sealing part of the lower mold are positioned and matched to form a sealing area with a 3D three-dimensional shape on the inner side of the composite material near the cutting area.
[0007] By adopting the above technical solution, in step S1, the multi-layered materials are first cut and stacked according to the structure of the required product, so that the multi-layered materials form a whole composite material, which is convenient for subsequent integral molding; in step S2, positioning holes are punched around the edges of the composite material. The setting of the positioning holes facilitates the positioning and cooperation of the composite material with the positioning part of the lower mold, ensuring that the composite material is placed accurately and is not prone to displacement, thereby improving the stability and accuracy of subsequent molding; in step S3, under the action of the anti-slip part, the positioning area of the composite material is accurately placed in the positioning part of the lower mold, ensuring that the composite material will not shift during the molding process, further improving the positional accuracy of the composite material in the lower mold. This improves molding accuracy and efficiency. In step S4, the positioning mold and positioning part first press the positioning area of the composite material to form a 3D three-dimensional shape. The 3D three-dimensional shape can provide initial support for the composite material, which is beneficial to the accuracy of subsequent molding and reduces the tensile force on the composite material. Then, the molding punch of the upper mold and the molding cavity of the lower mold are used for molding. This can accurately mold a composite material with a 3D three-dimensional structure. The molding cavity of the lower mold can cooperate with the molding punch of the upper mold. Compared with the structure of the lower mold being a punch, the composite material can fit the lower mold more closely, further reducing the tensile force on the composite material during molding, thereby reducing the damage to the composite material and improving the molding accuracy. At the same time, the first cutting and molding part of the upper mold and the second molding and cutting part of the lower mold cooperate to form a 3D three-dimensional cutting area, and the first sealing part of the upper mold and the second sealing part of the lower mold cooperate to form a 3D three-dimensional sealing area, so that the composite material can be directly cut through the cutting area after molding. The setting of the sealing area means that the composite material does not need to be sealed with sewing thread after cutting.
[0008] Compared to existing technologies, this technology avoids the tedious subsequent sewing and sealing processes, improves production efficiency, and offers high processing precision for products with complex layer structures and shapes featuring precise 3D structures. The products are less prone to deformation, and the edges are three-dimensional and flat, without any misalignment between material layers. It is suitable for the production of 3D masks, 3D molded cups, and other products.
[0009] Preferably, the anti-slip part in step S2 is either a silicone foam pad or a polyurethane foam pad.
[0010] By adopting the above technical solution, using silicone foam pads or polyurethane foam pads as anti-slip parts, compared with the flat clamps in the prior art, the anti-slip parts have better support and flexibility, can closely fit the positioning area of the composite material, and form a 3D three-dimensional anti-slip structure. During the molding process, it can better fix and position the composite material, avoid the composite material from sliding and shifting, and improve the positioning accuracy and stability.
[0011] Secondly, this application provides a 3D molding die, which adopts the following technical solution: A 3D molding die is used in the aforementioned 3D molding edge sealing process. The 3D molding die includes an upper die and a lower die. A molding punch is provided at the bottom of the upper die, and a molding cavity is recessed at the top of the lower die. The molding punch and the molding cavity are correspondingly arranged. A positioning die is movably connected to the bottom of the upper die. The positioning die is hollow, and the molding punch passes through the hollow area of the positioning die. Positioning parts are provided at the four edges of the lower die, and anti-slip parts are provided at the top of the positioning parts. Both the positioning parts and the anti-slip parts have a 3D three-dimensional structure. A positioning plate is provided at the bottom of the positioning die. The positioning plate is correspondingly arranged with the anti-slip parts and is positioned and engaged with the positioning parts.
[0012] By adopting the above technical solution, the molding punch at the bottom of the upper mold and the molding cavity at the top of the lower mold are correspondingly set, enabling the molding of composite materials to form a 3D three-dimensional structure. The hollow positioning mold movably connected to the bottom of the upper mold allows the positioning mold to first abut against the positioning area of the composite material during molding, pressing the positioning area to form a 3D three-dimensional shape. The hollow design of the positioning mold facilitates the subsequent insertion and molding of the molding punch of the upper mold. The 3D three-dimensional positioning and anti-slip parts set around the edges of the lower mold, in conjunction with the positioning plate at the bottom of the positioning mold, ensure precise positioning of the positioning area of the composite material, preventing slippage during molding and improving molding accuracy.
[0013] Preferably, the top of the positioning part is provided with a plurality of first positioning posts at intervals, the anti-slip part is detachably inserted into the positioning part through the plurality of first positioning posts, and the bottom of the positioning plate is provided with a plurality of first positioning grooves, the plurality of first positioning posts and the plurality of first positioning grooves being positioned and engaged.
[0014] By adopting the above technical solution, the anti-slip part is detachably inserted into the positioning part through the first positioning post of the positioning part, which improves the anti-slip and fixing stability of the anti-slip part, and facilitates the assembly and replacement of the anti-slip part; the first positioning groove at the bottom of the positioning plate and the first positioning post at the top of the positioning part are positioned and matched, which enables the positioning plate to accurately dock with the positioning part during the molding process, ensuring that the positioning area of the composite material is precisely pressed, improving the positioning accuracy of the composite material during molding, and thus improving the molding processing accuracy of 3D stereoscopic structure products with precision structure.
[0015] Preferably, the upper mold assembly has a first cutting molding part circumferentially provided on the molding punch, and the lower mold has a second cutting molding part located at the periphery of the cavity wall of the molding cavity, with the first cutting molding part and the second cutting molding part being positioned and fitted together.
[0016] By adopting the above technical solution, the second cutting and molding part is set at the periphery of the cavity wall of the molding cavity of the lower mold, so that the first cutting and molding part of the molding punch of the upper mold can accurately mold and position itself with the periphery of the cavity wall of the molding cavity, further improving the molding accuracy of the composite material, reducing the tension of the upper mold on the composite material, and reducing the problem of molding deformation. Moreover, the positioning and cooperation between the first cutting and molding part of the upper mold and the second molding and cutting part of the lower mold can form a cutting area with a 3D shape on the inner side of the composite fabric near the positioning area, so that the 3D molding and sealing process can accurately complete the cutting operation and improve the processing accuracy of 3D three-dimensional structure products with precision structure.
[0017] Preferably, the upper mold is provided with a first sealing edge portion corresponding to the inner area of the first cutting and molding part, and the lower mold is provided with a second sealing edge portion corresponding to the inner area of the second cutting and molding part, with the first sealing edge portion and the second sealing edge portion being provided correspondingly.
[0018] By adopting the above technical solution, the first sealing part of the upper mold and the second sealing part of the lower mold are positioned and matched, and a sealing area with a 3D three-dimensional shape can be formed by molding on the inner side of the composite material near the cutting area. This eliminates the need for sewing and sealing after cutting the molded product, improving processing efficiency and providing high processing accuracy for 3D three-dimensional products with precision structures.
[0019] Preferably, the upper mold and the positioning mold are movably connected by bolts, the positioning mold is fixedly connected to the bottom of the bolts, the upper mold has through holes in the four corner areas, the diameter of the top area of the through hole is larger than the diameter of the bottom area of the through hole, the head of the bolt is movably engaged in the top area of the through hole, and a spring is sleeved on the bottom of the bolt.
[0020] By adopting the above technical solution, the upper mold and the positioning mold are movably connected, ensuring the adjustability of the position between the positioning mold and the upper mold. This allows the bolts on the top of the positioning mold to move along the through hole of the upper mold, ensuring that the positioning plate of the positioning mold is stably pressed against the positioning area of the composite material. When the positioning mold comes into contact with the positioning area of the composite material, it can achieve buffering through the elastic action of the spring, avoiding excessive compression and damage to the composite material. This is conducive to accurately pressing the positioning area to form a 3D three-dimensional shape, improving the processing accuracy and product quality of the 3D molding and sealing process. After molding, it can also achieve buffering and reset, improving molding efficiency.
[0021] Preferably, the upper mold has a second positioning post at each of the four bottom corners, and the lower mold has a second positioning groove at each of the four top corners, with the second positioning post inserted into the second positioning groove.
[0022] By adopting the above technical solution, the second positioning pins in the four corner areas of the bottom of the upper mold and the second positioning grooves in the four corner areas of the top of the lower mold can be inserted and matched to ensure that the upper mold and the lower mold are accurately positioned during the molding process, avoid misalignment between the upper mold and the lower mold, improve the stability and accuracy of the molding process, and thus improve the processing accuracy of 3D stereoscopic products with precision structure.
[0023] Thirdly, this application provides an application of a 3D molding edge sealing process, or an application of a 3D molding die, employing the following technical solution: An application of a 3D molding edge sealing process, or an application of a 3D molding mold, in 3D stereoscopic masks and 3D stereoscopic molded cups.
[0024] By adopting the above technical solutions, the 3D molding edge sealing process and 3D molding mold of this application are suitable for processing products with precision and complex structures, such as 3D stereoscopic masks and 3D stereoscopic molded cups. The processing accuracy is high, the products are not easily deformed, the edges are three-dimensional and flat, and there will be no misalignment between material layers.
[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The 3D molding and sealing process of this application involves cutting and stacking multiple layers of material to obtain a composite material. After punching positioning holes, the composite material is positioned and fitted with the lower mold positioning part and placed on top of the anti-slip part. When the upper mold presses down, the positioning mold first presses the positioning area to form a 3D three-dimensional shape. The upper mold continues to press down, and the molding punch and molding cavity are molded and formed. At the same time, the first cutting molding part and the second molding cutting part cooperate to form a cutting area, and the first sealing part and the second sealing part cooperate to form a sealing area. Compared with the prior art, this process avoids the subsequent cumbersome sewing and sealing process, improves production efficiency, and has high processing accuracy for products with precise and complex 3D three-dimensional structures. The products are not easily deformed, and the edges are three-dimensional and flat, without the problem of misalignment between material layers. This process is suitable for the production of 3D three-dimensional masks, 3D three-dimensional molded cups, and other products.
[0026] 2. Use silicone foam pads or polyurethane foam pads as anti-slip parts. The anti-slip parts are set on the top of the positioning parts, which can better fix the composite material on the positioning parts during the molding process, thereby improving the molding accuracy and stability.
[0027] 3. The 3D molding die of this application has a molding punch at the bottom of the upper die and a molding cavity at the top of the lower die. The positioning die and the positioning part are positioned and fitted together. The upper die and the positioning die are movably connected by bolts and are provided with springs. The molding punch of the upper die assembly has a first cutting molding part circumferentially. The molding cavity of the lower die has a second cutting molding part at the periphery of the cavity wall. The first cutting molding part and the second cutting molding part are positioned and fitted together. The upper die has a first sealing part in the inner area corresponding to the first cutting molding part, and the lower die has a second sealing part in the inner area corresponding to the second cutting molding part. The first sealing part and the second sealing part are correspondingly set, which can accurately mold composite materials and improve the processing accuracy of 3D three-dimensional structural products with precision structures. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of the 3D molding die of this application; Figure 2 yes Figure 1 A longitudinal sectional view; Figure 3 This is an exploded view of the 3D molding die of this application; Figure 4 This is an exploded view of the 3D molding die of this application from another angle; Figure 5 This is a partial structural schematic diagram of the first cutting and molding part, the second cutting and molding part, the first edge sealing part, and the second edge sealing part of the 3D molding die of this application; Figure 6 This is a schematic diagram of the structure of the 3D stereoscopic mask before it is cut, as shown in the application example of this application; Figure 7 This is a schematic diagram of the front structure of the 3D three-dimensional mask body in an application example of this application; Figure 8 This is a schematic diagram of the back structure of the 3D three-dimensional mask body in an application example of this application; Figure 9 This is a schematic diagram of the interlayer structure of the 3D three-dimensional mask body in an application example of this application.
[0029] Explanation of reference numerals in the attached drawings: 1. Upper mold; 11. Molding punch; 111. First cutting and molding part; 112. First edge sealing part; 12. Through hole; 13. Second positioning post; 2. Positioning mold; 21. Bolt; 22. Spring; 23. Positioning plate; 231. First positioning groove; 3. Lower mold; 31. Molding cavity; 311. Positioning part; 312. First positioning post; 313. Anti-slip part; 314. Second cutting and molding part; 315. Second sealing edge; 32. Second positioning groove; 4. Positioning area; 41. Positioning hole; 5. Cutting area; 6. Sealing area; 60. Mask body; 61. Outer layer; 611. First hollow area; 62. Breathable layer; 63. Inner layer; 631. Second hollow area; 64. First adhesive layer; 65. Second adhesive layer; 66. First support layer; 67. Second support layer; 68. Third adhesive layer; 69. Fourth adhesive layer. Detailed Implementation
[0030] The present application will be further described in detail below with reference to embodiments and application examples. Example
[0031] Example 1 Example 1 discloses a 3D molding die, referring to Figure 1 and Figure 2 It includes an upper mold 1, a positioning mold 2 and a lower mold 3. The bottom of the upper mold 1 is provided with a molding punch 11 and the top of the lower mold 3 is provided with a molding cavity 31. The molding punch 11 and the molding cavity 31 are provided correspondingly. The specific structure of the molding punch 11 and the molding cavity 31 can be designed according to the 3D three-dimensional structure of the product in need. The positioning mold 2 is movably connected to the bottom of the upper mold 1. The positioning mold 2 is hollow. The molding punch 11 passes through the hollow area of the positioning mold 2. Specifically, the upper mold 1 and the positioning mold 2 are movably connected by bolts 21. More specifically, the top of the positioning mold 2 is fixedly connected to the bottom of the bolts 21. The four corner areas of the upper mold 1 are provided with through holes 12. The diameter of the top area of the through hole 12 is larger than the diameter of the bottom area of the through hole 12, so that the through hole 12 forms a structure that is larger at the top and smaller at the bottom. The head of the bolt 21 is engaged with the top area of the through hole 12, so that the head of the bolt 21 can move along the top area of the through hole 12 without falling off along the through hole 12. A spring 22 is sleeved on the bottom of the bolt 21.
[0032] To be more specific, refer to Figures 2 to 4The lower mold 3 has a positioning part 311 at its four edges. The top of the positioning part 311 is provided with a plurality of first positioning posts 312 at intervals. The top of the positioning part 311 is provided with an anti-slip part 313. Preferably, the anti-slip part 313 is a silicone foam pad or a polyurethane foam pad, which has good flexibility, support and anti-slip properties. In this embodiment, the anti-slip part 313 is a silicone foam pad. The anti-slip part 313 is detachably inserted into the positioning part 311 through a plurality of first positioning posts 312. Both the positioning part 311 and the anti-slip part 313 have a 3D three-dimensional structure. The bottom four-sided area of the positioning mold 2 is provided with a positioning plate 23. The positioning plate 23 is correspondingly provided with the anti-slip part 313 and is positioned and cooperates with the positioning part 311. Specifically, the bottom of the positioning plate 23 is provided with a plurality of first positioning grooves 231, and the plurality of first positioning posts 312 are positioned and cooperate with the plurality of first positioning grooves 231. The upper mold 1 has a second positioning post 13 at each of the four bottom corners, and the lower mold 3 has a second positioning groove 32 at each of the four top corners, with the second positioning post 13 inserted into the second positioning groove 32.
[0033] Reference Figures 3 to 5 More specifically, the upper mold 1 has a first cutting molding portion 111 circumferentially arranged on the molding punch 11, and the lower mold 3 has a second cutting molding portion 314 arranged at the periphery of the cavity wall of the molding cavity 31. The first cutting molding portion 111 and the second cutting molding portion 314 are positioned and engaged. Specifically, the second cutting molding portion 314 is a groove formed at the periphery of the cavity wall of the molding cavity 31 of the lower mold 3, and the first cutting molding portion 111 is a protrusion circumferentially arranged on the molding punch 11 of the upper mold 1, which is engaged in the groove. The inner area of the first cutting molding portion 111 has a first sealing portion 112, and the inner area of the second cutting molding portion 314 has a second sealing portion 315. The first sealing portion 112 and the second sealing portion 315 are correspondingly arranged.
[0034] Heating plates are installed inside both the upper mold 1 and the lower mold 3. The heating plates heat the upper mold 1 and the lower mold 3 during the molding process to achieve the molding of the mask. The heating temperature is generally 110-130℃, which depends on the melting point temperature of the hot melt adhesive film of the composite material.
[0035] Example 2 Example 2 discloses a 3D molding edge sealing process, which uses the 3D molding mold of Example 1, referring to... Figures 1-6 The process includes the following steps: S1. Cut and stack the multi-layered materials according to the required product structure to obtain a composite material; S2. Several spaced positioning holes 41 are punched out at the four edges of the composite material; S3. The composite material is placed in the lower mold 3 of the molding die. The positioning area 4 of the periphery of the composite material is positioned and engaged with the positioning part 311 provided on the top periphery of the lower mold 3. The top of the positioning part 311 is provided with an anti-slip part 313, and the positioning area 4 of the composite material is placed on the top of the anti-slip part 313. S4. Drive the upper mold 1 of the molding die to move downward. The positioning mold 2 of the molding die first abuts against the positioning area 4 of the composite material, pressing the positioning area 4 to form a 3D three-dimensional shape. Then the upper mold 1 of the molding die continues to move downward. The molding punch 11 of the upper mold 1 and the molding cavity 31 of the lower mold 3 are molded together to form a composite material with an overall 3D three-dimensional structure. During the molding process in step S4, the first cutting molding part 111 of the upper mold 1 and the second molding cutting part of the lower mold 3 are positioned and cooperated to form a cutting area 5 with a 3D three-dimensional shape on the inner side of the composite fabric near the positioning area 4. The first sealing part 112 of the upper mold 1 and the second sealing part 315 of the lower mold 3 are positioned and cooperated to form a sealing area 6 with a 3D three-dimensional shape on the inner side of the composite material near the cutting area 5.
[0036] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 2 is that the top of the positioning part 311 of the lower mold 3 does not have an anti-slip part 313, and the positioning area 4 of the composite material is directly positioned with the positioning part 311 of the lower mold 3. Otherwise, it is the same as Example 2.
[0037] Comparative Example 2 The difference between Comparative Example 2 and Example 2 is that the positioning plate 23 of the positioning mold 2, the positioning part 311 and the anti-slip part 313 of the lower mold 3 are all planar structures, while the rest are the same as Example 2.
[0038] Comparative Example 3 The difference between Comparative Example 3 and Example 2 is that the integrated molding process includes a lower mold with a punch structure and an upper mold with a die structure. A hollow reset plate is provided on the lower mold, and a hollow clamping plate corresponding to the reset plate is provided on the upper mold. During molding, the composite fabric is first laid flat on the reset plate. During the downward pressing of the upper mold, the clamping plate first abuts against the reset plate to press the composite fabric tightly. Then, the upper mold continues to move downward, and the reset plate is pressed down together with the upper mold. The upper mold and lower mold 3 are then closed to form the product. Everything else is the same as in Example 2.
[0039] Application examples Application Example 1 discloses a 3D three-dimensional mask with 3D molding and sealing, which is made by the 3D molding and sealing process of Example 2.
[0040] Reference Figures 6 to 9This 3D three-dimensional mask is molded from composite materials. The composite material includes a positioning area 4, a cutting area 5, a sealing area 6, and a mask body 60. The composite material comprises, from the outer surface to the inner surface, a surface layer 61, a first adhesive layer 64, a breathable layer 62, a second adhesive layer 65, an inner layer 63, and a support portion. The support portion is positioned corresponding to the cheekbone area on both sides of the face. The surface layer 61 is made of cotton, modal, spandex, or a blended fabric, or it can be a functional fabric with UV protection. In this embodiment, the surface layer 61 is a blended fabric of spandex and nylon with UV protection, with a nylon content of 75 wt% and a spandex content of 25 wt%. The breathable layer 62 is made of cotton, which has good softness and comfort. The inner layer 63 can be made of Tencel, spandex, modal, or a blended fabric, or it can be a fabric with cooling properties. In this embodiment, the inner layer 63 is a blended fabric of spandex and nylon with cooling properties, with a nylon content of 70 wt% and a spandex content of 30 wt%. The breathable layer 62 is a sandwich fabric layer. The outer layer 61 has a first hollow area 611 corresponding to the mouth, nose and cheek areas of the face. The outer layer 61 is attached to the breathable layer 62 by the first adhesive layer 64. The inner layer 63 has a second hollow area 631 corresponding to both cheek areas of the face. The middle area and edge area of the inner layer 63 form a supporting three-dimensional structure corresponding to the face. The inner layer 63 is attached to the breathable layer 62 by the second adhesive layer 65.
[0041] Reference Figure 9 The support portion includes a first support layer 66 and a second support layer 67 sequentially bonded from the outer surface to the inner surface. The area of the second support layer 67 is larger than the area of the first support layer 66. The first support layer 66 and the inner layer 63 are bonded together by a third adhesive layer 68, and the second support layer 67 and the first support layer 66 are bonded together by a fourth adhesive layer 69. The first adhesive layer 64, the second adhesive layer 65, the third adhesive layer 68, and the fourth adhesive layer 69 are preferably polyurethane hot melt adhesive films, which have good bonding stability and environmental friendliness.
[0042] Reference Figures 6 to 9 During molding, the support part is placed with one side facing upward in the molding cavity 31 of the lower mold 3 of the molding die. During molding, the first adhesive layer 64, the second adhesive layer 65, the third adhesive layer 68 and the fourth adhesive layer 69 are melted under the heating action of the heating plate to bond the material layers together. After molding, the positioning area 4 of the composite material is cut off along the cutting area 5 to obtain the finished 3D three-dimensional mask.
[0043] Application Example 2 The difference between Application Example 2-4 and Application Example 1 is that the source of the 3D molding edge sealing process is different, as detailed in Table 1 below.
[0044] Table 1. Source Table of 3D Molding Edge Sealing Process in Application Examples 2-4 Application examples The origin of 3D molding edge sealing technology Application Example 2 Comparative Example 1 Application Example 3 Comparative Example 2 Application Example 4 Comparative Example 3 Performance testing was conducted on the 3D masks prepared according to the following test cases 1-4: 1. Test on the positional deviation of the support component Using a visual inspection device for masks, the positional deviation of the support part of the manufactured 3D three-dimensional mask is detected. The positional deviation is considered qualified if it is within 0.02mm, and the test results are recorded. 2. Edge three-dimensionality testing of 3D masks Place the 3D mask face down on the testing platform and visually inspect whether the sealing area of the 3D mask is deformed. Record the test results. The following are the performance test data of the 3D masks prepared in Examples 1-4. Please refer to Table 2 below for details.
[0045] Table 2 Performance test data of the 3D masks prepared in Application Examples 1-4 Combining Application Example 1 and Application Examples 2-3 with Table 2, it can be concluded that using the 3D molding process of this application in conjunction with the 3D molding mold of this application, the 3D three-dimensional mask produced has high molding precision and high three-dimensionality of the sealing area, with no deformation.
[0046] In Application Example 2, without the anti-slip part, the positional deviation of the support part of the 3D mask is 0.2mm, and the sealing area is deformed. This may be because the lack of anti-slip and support from the anti-slip part reduces the molding accuracy and three-dimensionality.
[0047] In Application Example 3, the positioning plate of the positioning mold, the positioning part of the lower mold, and the anti-slip part are all planar structures. The positional deviation of the support part of the 3D mask is 0.12mm, and the sealing area shows obvious deformation. This may be because the planar structure reduces the three-dimensional support of the composite material, causing positional displacement during the molding process and reducing the three-dimensionality of the 3D mask.
[0048] In Application Example 4, the upper template is set as a concave mold and the lower template is set as a convex mold. The positional deviation of the support part of the 3D mask is 0.35mm, and the sealing area shows obvious deformation. This may be because the molding structure of the lower mold as a convex mold causes the composite material to generate a large tensile force during the molding process, which reduces the molding accuracy of the composite material and the three-dimensionality of the sealing area.
[0049] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A 3D die edge process, characterized in that, It comprises the following steps: S1, cutting and stacking the multi-layer material according to the required product structure to obtain a composite material; S2, punching a plurality of positioning holes (41) at the four edge positions of the composite material; S3, placing the composite material on the lower mold (3) of the mold pressing mold, the positioning area (4) of the four edge areas of the composite material is positioned and matched with the positioning part (311) arranged at the top of the four edge of the lower mold (3), the top of the positioning part (311) is correspondingly provided with an anti-skid part (313), and the positioning area (4) of the composite material is correspondingly placed on the top of the anti-skid part (313); S4, driving the upper mold (1) of the mold pressing mold to move downward, the positioning mold (2) of the mold pressing mold first abuts against the positioning area (4) of the composite material, the positioning area (4) is pressed tightly to form a 3D solid shape, then the upper mold (1) of the mold pressing mold continues to move downward, the mold pressing convex mold (11) of the upper mold (1) is matched with the mold pressing concave cavity (31) of the lower mold (3) to perform mold pressing forming, and a composite material with a 3D solid structure is formed; In the mold pressing forming in the S4 step, the first cutting mold pressing part (111) of the upper mold (1) is positioned and matched with the second mold pressing cutting part of the lower mold (3), a cutting area (5) with a 3D solid shape is formed on the inner side of the composite fabric close to the positioning area (4), the first edge sealing part (112) of the upper mold (1) is positioned and matched with the second edge sealing part (315) of the lower mold (3), and an edge sealing area (6) with a 3D solid shape is formed on the inner side of the composite material close to the cutting area (5).
2. A 3D moulded edge process according to claim 1, characterised in that, The anti-skid part (313) in the S2 step is any one of a silica gel foam pad and a polyurethane foam pad.
3. A 3D compression mold characterized by, It is applied to the 3D mold pressing and edge sealing process of claim 1 or 2.
4. A 3D compression mold according to claim 3, comprising an upper mold (1) and a lower mold (3), characterized in that, The bottom of the upper mold (1) is provided with a mold pressing convex mold (11), the top of the lower mold (3) is concavely provided with a mold pressing concave cavity (31), the mold pressing convex mold (11) and the mold pressing concave cavity (31) are correspondingly arranged, the bottom of the upper mold (1) is movably connected with a positioning mold (2), the positioning mold (2) is hollowly arranged, the mold pressing convex mold (11) is arranged in the hollow area of the positioning mold (2), the positioning part (311) is arranged at the four edge positions of the lower mold (3), the top of the positioning part (311) is provided with an anti-skid part (313), the positioning part (311) and the anti-skid part (313) both have a 3D solid structure, the bottom of the positioning mold (2) is provided with a positioning plate (23), the positioning plate (23) is correspondingly arranged with the anti-skid part (313) and is positioned and matched with the positioning part (311).
5. A 3D compression mold according to claim 4, wherein The top of the positioning part (311) is spaced apart from a plurality of first positioning columns (312), the anti-skid part (313) is detachably connected to the positioning part (311) through the plurality of first positioning columns (312), the bottom of the positioning plate (23) is provided with a plurality of first positioning grooves (231), and the plurality of first positioning columns (312) are positioned and matched with the plurality of first positioning grooves (231).
6. A 3D compression mold according to claim 5, wherein The upper die (1) assembly is provided with a first cutting die (111) circumferentially arranged on the die pressing punch (11), and the die pressing cavity (31) of the lower die (3) is provided with a second cutting die (314) at the edge position around the cavity wall, and the first cutting die (111) and the second cutting die (314) are positioned and matched.
7. A 3D compression mold according to claim 6, wherein The upper die (1) is provided with a first edge sealing part (112) at the inner side area corresponding to the first cutting die (111), and the lower die (3) is provided with a second edge sealing part (315) at the inner side area corresponding to the second cutting die (314), and the first edge sealing part (112) and the second edge sealing part (315) are correspondingly arranged.
8. A 3D compression mold according to any one of claims 4-7, characterized in that, The upper die (1) and the positioning die (2) are movably connected through a bolt (21), the positioning die (2) is fixedly connected to the bottom of the bolt (21), four corner areas of the upper die (1) are provided with through holes (12), the diameter of the top area of the through hole (12) is larger than that of the bottom area of the through hole (12), the head of the bolt (21) can be movably connected to the top area of the through hole (12), and the bottom of the bolt (21) is sleeved with a spring (22).
9. A 3D compression mold according to claim 8, wherein, The bottom of the upper die (1) is provided with a second positioning column (13) at four corner areas, and the top of the lower die (3) is provided with a second positioning groove (32) at four corner areas, and the second positioning column (13) is inserted and matched with the second positioning groove (32).
10. Use of a 3D die edge finishing process according to any one of claims 1-2 or use of a 3D die according to any one of claims 3-9, characterized in that, Applied to 3D three-dimensional mask and 3D three-dimensional cup.