Flange-free leather cup copying mold

Abstract

The invention belongs to the technical field of molds, and particularly discloses a flash-free leather cup copying mold which comprises a mold plate, a base plate arranged below the mold plate and mold cores evenly distributed on the mold plate. The mold core comprises an upper mold core group, a middle mold core and a lower mold core which are sequentially arranged from top to bottom, and a model cavity is formed among the upper mold core group, the middle mold core and the lower mold core; the upper mold core set comprises an upper mold inner core and an upper mold core arranged outside the upper mold inner core in a sleeving mode, and the upper mold core is provided with a material injection hole communicated with the model cavity. The invention provides a flash-free leather cup copying mold which comprises a mold plate, a base plate arranged below the mold plate and mold cores evenly distributed on the mold plate, and the number of the mold cores can be set according to actual production requirements, so that it is ensured that copying operation of a plurality of leather cups can be conducted at the same time, and the production efficiency is improved. The formwork is connected with the base plate, and the base plate supports the formwork.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a no-flash skin bowl complex mold. BACKGROUND

[0002] The no-edge skin bowl product is mainly applied to the brake system of new energy vehicles. Its core function is to transmit pressure and realize sealing effect, to ensure that the piston rod can move stably and efficiently in the system, and to effectively prevent any form of leakage, thereby becoming an indispensable core sealing component of the brake system. With the rapid development of the new energy vehicle industry, the demand for no-edge skin bowls in the global automobile market is showing a trend of increasing year by year. It is estimated that by 2024, the demand for no-edge skin bowls in the world will be close to 300 million, while the market share of domestic no-edge skin bowls is only 35%. Therefore, there is still great development space and potential in the market.

[0003] In the application of no-edge skin bowl complex mold, it is mainly used for trial production and mass production, with an annual demand of nearly 200 sets. However, at present, China does not have the processing and manufacturing technology of no-edge complex mold, and all related molds completely rely on import from the United States. In recent years, with the changes in international trade environment and the large fluctuations in tariffs, not only the procurement cycle is long, but also the cost of imported molds is rising, which seriously restricts the research and development response speed and cost control of domestic related enterprises.

[0004] With the continuous and rapid development of the new energy vehicle industry, the demand for no-edge skin bowls in the market is showing a trend of significant growth. Simply relying on imported molds cannot meet the urgent needs of the development of domestic new energy vehicles. Therefore, accelerating the research and industrialization process of domestic no-edge skin bowl complex mold has become an inevitable choice and urgent task to promote the independent and controllable development of China's new energy vehicle industry.

[0005] In the prior art, the imported no-edge skin bowl complex mold has the following structural defects: first, the upper mold is of a whole structure, which cannot effectively control the pressure bearing and glue sealing behavior of the skin bowl in the inner parting area, which is easy to cause glue overflow or loose sealing, resulting in flash; second, the mold parting surface lacks special exhaust design, and the gas cannot be smoothly discharged during vulcanization, causing internal defects or incomplete surface of the product. The above problems make it necessary to add a trimming process subsequently, which not only increases the labor intensity and production cost, but also reduces the product consistency and production efficiency.

[0006] In summary, the skin bowl complex mold in the prior art has the problems of poor glue sealing effect, poor exhaust, obvious product flash and dependence on subsequent trimming due to unreasonable structure design. SUMMARY

[0007] The application provides a flash-free skin bowl complex mold, which can solve the problems of poor sealing effect, poor exhaust, obvious flash of products and dependence on subsequent trimming caused by unreasonable structure design in the prior art.

[0008] A flash-free skin bowl complex mold, comprising a mold plate, a base plate arranged below the mold plate and mold cores uniformly arranged on the mold plate. The mold core comprises an upper mold core group, a middle mold core and a lower mold core arranged in sequence from top to bottom, and a model cavity is formed between the upper mold core group, the middle mold core and the lower mold core. The upper mold core group comprises an upper mold inner core and an upper mold core sleeved on the outer part of the upper mold inner core, and the upper mold core is provided with an injection hole in communication with the model cavity. The combination surface of the lower mold core and the upper mold inner core and the combination surface of the lower mold core and the middle mold core are both provided with radial exhaust lines.

[0009] Further, the radial exhaust lines comprise a plurality of exhaust grooves, and the plurality of exhaust grooves extend from the center to the edge of the combination surface.

[0010] Further, the upper mold core and the upper mold inner core are in clearance fit.

[0011] Further, the mold plate is provided with mounting holes matched with the mold core.

[0012] Further, the mold core and the mounting holes on the mold plate are in clearance fit.

[0013] Further, a central exhaust hole is arranged at the top center of the lower mold core.

[0014] Further, the middle mold core comprises a middle mold core shell, and the inner surface of the middle mold core shell is provided with an annular protrusion A arranged between the upper mold core and the lower mold core.

[0015] Further, the outer surface of the upper mold core is provided with an annular groove A matched with the middle mold core shell at the lower end.

[0016] Further, the lower mold core comprises a lower mold core base, an intermediate step and an upper step connected in sequence from bottom to top and gradually decreasing in outer diameter. The outer surface of the middle mold core shell is sleeved on the outer part of the intermediate step.

[0017] Further, the outer surface of the upper mold inner core is provided with a plurality of annular protrusions B, and the inner surface of the upper mold core is provided with an annular protrusion C at the position corresponding to the annular protrusions B.

[0018] Compared with the prior art, the application has the following beneficial effects: 1. The present application provides a no flash skin bowl complex mold, including template, set in the template below the backing plate and uniform distribution on the template core, the number of core can be set according to actual production demand, to ensure that multiple skin bowl complex operation can be carried out at the same time, improve production efficiency. The template and the backing plate are connected, and the backing plate forms a support for the template.

[0019] 2. In the present application, the core includes upper core group, middle core and lower core arranged from top to bottom, the upper core group, the middle core and the lower core form a model cavity; the shape of the model cavity is matched with the shape of the skin bowl required for complex molding, to ensure that the size of the skin bowl is accurate and the shape is regular. The upper core group can be designed and replaced according to the top features of different skin bowls, meeting the diversified production needs. The middle core plays a stabilizing and transitional role, ensuring the overall stability of the model cavity. The lower core cooperates with the template and the backing plate to provide a solid support foundation for the entire complex molding process, ensuring that the mold will not deform or shift during the complex molding process, thereby improving the quality and success rate of complex molding.

[0020] 3. In the present application, the upper core group includes an upper mold inner core and an upper mold core sleeved on the outside of the upper mold inner core, and the upper mold core is provided with an injection hole communicating with the model cavity; the injection hole is used to ensure the smoothness of the injection process, and by arranging it on the upper mold core, the problem of bubbles and other factors affecting the quality of complex molding during injection can be effectively avoided. In addition, the upper mold core is sleeved on the outside of the upper mold inner core, which ensures that there is no relative displacement between the two during complex molding, thereby ensuring the shape stability of the model cavity and further improving the quality of the skin bowl.

[0021] 4. In the present application, the combination surface of the lower core and the upper mold inner core and the combination surface of the lower core and the middle core are both provided with radial exhaust patterns; the radial exhaust patterns can effectively exhaust the gas generated inside the mold during complex molding. Specifically, the radial exhaust patterns are arranged on the combination surface of the lower core and the upper mold inner core, which can prevent the skin bowl from having quality problems such as bubbles and defects due to gas accumulation at the combination surface, and ensure the close fit of the combination surface. Similarly, the radial exhaust patterns arranged on the combination surface of the lower core and the middle core can also avoid gas stagnation, ensure the stable connection between the middle core and the lower core, maintain the overall stability of the model cavity, and further improve the precision of complex molding and the finished product quality of the skin bowl. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A structure diagram of a no flash skin bowl complex mold provided by the present application; Figure 2A structural cross-sectional view of a burr-free leather bowl replica mold provided by the present invention; Figure 3 A cross-sectional view of the core structure of a flashless leather bowl replica mold provided by the present invention; Figure 4 A top view of the lower mold core of a flashless leather bowl replica mold provided by the present invention; Figure 5 This is a cross-sectional view of the lower mold core of a flashless leather bowl replica mold provided by the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Template; 2. Backing plate; 3. Mold core; 4. Upper mold core assembly; 5. Middle mold core; 6. Lower mold core; 7. Mold cavity; 9. Radial venting pattern; 11. Mounting hole; 41. Injection hole; 42. Upper mold inner core; 43. Upper mold core; 421. Annular protrusion B; 431. Annular groove A; 432. Annular protrusion C; 51. Middle mold core shell; 52. Annular protrusion A; 61. Central vent; 63. Lower mold core base; 64. Middle step; 65. Upper step; 66. Annular surface A; 67. Annular surface B. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0025] like Figures 1 to 3 As shown, the present invention provides a die-free leather bowl molding die, including a template 1, a pad 2 disposed below the template 1, and mold cores 3 evenly distributed on the template 1; the mold core 3 includes an upper mold core group 4, a middle mold core 5, and a lower mold core 6 arranged sequentially from top to bottom, and a model cavity 7 for forming a die-free leather bowl is formed between the upper mold core group 4, the middle mold core 5, and the lower mold core 6; The upper mold core assembly 4 includes an upper mold inner core 42 and an upper mold core 43 fitted outside the upper mold inner core 42. The upper mold core 43 is provided with an injection hole 41 that communicates with the mold cavity 7. The upper mold core assembly 4 consists of an upper mold inner core 42 and an upper mold core 43. The upper mold inner core 42 has the function of freely moving up and down along the axial direction of the upper mold core 43, thereby ensuring that the upper mold core assembly 4 can independently withstand pressure and achieve sealing. The design of the upper mold core 43 fully considers the fitting accuracy with the upper mold inner core 42 and the stability during the injection process. Its inner wall is precision machined to ensure the gap between it and the upper mold inner core 42, effectively preventing leakage problems that may occur during injection. At the same time, the position of the injection hole 41 on the upper mold core 43 is optimized, so that the material can be filled into the mold cavity 7 evenly and quickly, improving production efficiency and product quality.

[0026] The combination surface of the lower mold core 6 and the upper mold inner core 42 and the combination surface of the lower mold core 6 and the middle mold core 5 are respectively provided with a radial exhaust pattern 9; the radial exhaust pattern 9 includes a plurality of exhaust grooves, and specifically, the radial exhaust pattern 9 is formed by processing a plurality of exhaust grooves on each combination surface by a laser method; the exhaust grooves can effectively exhaust the gas generated during vulcanization, thereby avoiding the problem of air entrapment; The radial exhaust pattern 9 is designed after careful consideration, and is processed by a laser method; the groove depth, groove width and groove spacing can be optimized according to the actual gas generation amount and exhaust demand during the vulcanization process. This unique exhaust structure can quickly guide the gas to the edge of the mold and exhaust it during the vulcanization process, greatly reducing the accumulation of gas in the model cavity 7. Moreover, the exhaust grooves formed by laser processing have high surface precision and no burrs, which will not damage other parts of the mold, while ensuring the sealing performance of the mold combination surface, preventing material leakage, and further improving the performance and product quality of the mold.

[0027] Specifically, the no-flash skin bowl compound mold has the following advantages: First, the mold plate 1 is provided with a mounting hole 11 matched with the mold core 3, and the mold core 3 is in clearance fit with the mounting hole 11 on the mold plate 1. This fit not only ensures that the mold core 3 can be installed in place smoothly, but also allows it to be adjusted freely within a certain range, thereby avoiding the problems of installation difficulty caused by too tight fit and insufficient precision caused by too loose fit. By adopting this independent pressure-bearing structure of the mold plate 1 and the mold core 3, the problem of mold plate machining precision interfering with the mold core in traditional molds is successfully solved. In this structure, the mold plate 1 and the mold core 3 bear pressure independently and do not interfere with each other, thereby ensuring the overall machining precision and stability of the mold. This not only improves the service life of the mold, but also greatly improves the production efficiency and product quality, providing reliable technical support for the precise manufacturing of no-flash skin bowls; Second, the upper mold core 43 and the upper mold inner core 42 can be combined into an upper mold core group 4 through vulcanization injection, and the upper mold inner core 42 still has the ability to move freely up and down, so that the upper mold inner and outer parting can independently bear pressure and seal glue; This design greatly enhances the adaptability of the mold. During the molding process of the no-flash skin bowl with complex shape, the upper mold inner core 42 can be flexibly adjusted in position according to actual needs, ensuring uniform and consistent sealing effect, and effectively avoiding material leakage and product defects caused by poor sealing in traditional molds. At the same time, the combined structure of the upper mold core group 4 simplifies the mold assembly process, reduces the fitting error between parts, and further improves the overall precision and stability of the mold, laying a solid foundation for the production of high-quality no-flash skin bowls.

[0028] Thirdly, the mounting hole 11 is arranged on the template 1 and matched with the mold core 3, and the mold core 3 is matched with the mounting hole 11 on the template 1 in a gap manner; specifically, the mold core 3, the middle mold core 5 and the lower mold core 6 are matched with the mounting hole 11 on the template 1 in a large gap manner, so that the template deformation and the precision error do not affect the matching precision of the mold core. Fourthly, the radial exhaust pattern 9 is arranged, and the radial exhaust pattern 9 is formed by processing a plurality of exhaust grooves on each bonding surface by a laser, so that the flash is avoided in the mold vulcanization production.

[0029] As shown in the drawings, Figures 1 to 5 in some embodiments of the present application, the upper mold core 43 is matched with the upper mold inner core 42 in a gap manner; and the upper mold inner core 42 is capable of moving up and down along the axial direction of the upper mold core 43, so as to ensure that the upper mold core group 4 can independently bear pressure and realize glue sealing.

[0030] As shown in the drawings, Figures 1 to 5 in some embodiments of the present application, the central exhaust hole 61 is arranged at the top center of the lower mold core 6; the design of the central exhaust hole 61, in combination with the design of the radial exhaust pattern 9, can further optimize the exhaust effect inside the mold, so that the gas can be more smoothly discharged in the mold vulcanization production process, avoiding the gas retention to cause the product to have bubbles, defects and other problems, thereby greatly improving the quality and the qualification rate of the product. At the same time, this exhaust design can also effectively reduce the pressure accumulation inside the mold, reduce the risk of mold damage, and prolong the service life of the mold.

[0031] As shown in the drawings, Figures 1 to 5 in some embodiments of the present application, the outer surface of the upper mold inner core 42 is provided with a plurality of annular protrusions B 421, and the inner surface of the upper mold core 43 is provided with annular protrusions C 432 corresponding to the positions of the annular protrusions B 421; the annular protrusions B 421 and the annular protrusions C 432 are matched with each other, so as to form multiple lines of defense between the upper mold inner core 42 and the upper mold core 43. This design not only enhances the connection stability between the upper mold inner core 42 and the upper mold core 43, but also effectively prevents the material from seeping out of the gap between the upper mold inner core 42 and the upper mold core 43 in the mold vulcanization production process, thereby further ensuring that the mold vulcanization production has no flash. At the same time, the design of the annular protrusions also increases the friction between the upper mold inner core 42 and the upper mold core 43, so that the upper mold inner core 42 moves up and down along the axial direction of the upper mold core 43 more stably and reliably.

[0032] As shown in the drawings, Figures 1 to 5 in some embodiments of the present application, the middle mold core 5 includes a middle mold core shell 51, the inner surface of the middle mold core shell 51 is provided with annular protrusions A 52, and the annular protrusions A 52 are arranged between the upper mold core 43 and the lower mold core 6; An annular groove A 431 is formed on the lower end of the outer surface of the upper mold core 43 and matches the middle mold core shell 51; The lower mold core 6 comprises a lower mold core base 63, an intermediate step 64 and an upper step 65 connected in sequence from bottom to top and gradually decreasing in outer diameter; the lower end of the outer surface of the middle mold core shell 51 is sleeved on the outside of the intermediate step 64; With this arrangement, the upper mold core 43 can be closely arranged on the upper end of the inner surface of the middle mold core shell 51, and the lower mold core 6 can be closely arranged on the lower end of the inner surface of the middle mold core shell 51, and the upper mold core group 4 and the lower mold core 6 are separated by the annular protrusion A 52; Specifically, since the model cavity 7 is formed between the upper mold core group 4, the middle mold core 5 and the lower mold core 6; and the upper mold core group 4 comprises an upper mold inner core 42 and an upper mold core 43 sleeved on the outside of the upper mold inner core 42, and the upper mold core 43 is provided with a pouring hole 41 communicating with the model cavity 7; therefore, the model cavity 7 is specifically formed by the lower end of the outer surface of the upper mold core group 4, the outer circumferential surface of the upper step 65, the inner surface of the annular protrusion A 52 and the top surface of the intermediate step 64; In addition, the lower mold core 6 comprises a lower mold core base 63, an intermediate step 64 and an upper step 65 connected in sequence from bottom to top and gradually decreasing in outer diameter; the lower end of the outer surface of the middle mold core shell 51 is sleeved on the outside of the intermediate step 64; and the combination surface of the lower mold core 6 and the upper mold inner core 42 and the combination surface of the lower mold core 6 and the middle mold core 5 are both provided with a radial exhaust pattern 9; combined with the specific structure of the lower mold core 6; Specifically, the radial exhaust pattern 9 is arranged on the part of the top surface of the upper step 65 that is in contact with the upper mold inner core 42, and the part of the top surface of the upper step 65 that is in contact with the upper mold inner core 42 is annular in shape, which can be marked as annular surface A 66; The radial exhaust pattern 9 is also arranged on the part of the top surface of the intermediate step 64 that is in contact with the annular protrusion A 52, and the part of the top surface of the intermediate step 64 that is in contact with the annular protrusion A 52 is annular in shape, which can be marked as annular surface B 67; More specifically, the radial exhaust pattern 9 is arranged on the annular surface A 66 and the annular surface B 67, respectively, and the radial exhaust pattern 9 is formed by processing a plurality of exhaust grooves on each combination surface by laser; The exhaust grooves on the radial exhaust pattern 9 located on the annular surface A 66 extend from the center to the edge of the annular surface A 66; The exhaust grooves on the radial exhaust pattern 9 located on the annular surface B 67 extend from the center to the edge of the annular surface B 67; This venting groove maximizes venting while ensuring the structural strength of the mold. The venting groove facilitates rapid gas discharge and prevents material from seeping into the groove and causing blockages during the molding process. In actual production, this layout of the radial venting patterns 9 effectively avoids defects such as air bubbles and material shortages caused by the inability to expel gas in time during the molding of the leather cup, greatly improving the quality and yield of the leather cup mold. Moreover, this method of laser-processing the venting grooves has advantages such as high processing precision, high efficiency, and good repeatability, ensuring a high degree of consistency of the radial venting patterns 9 on each mold, providing a reliable guarantee for large-scale production.

[0033] like Figures 1 to 5 As shown, in some embodiments of the present invention, the outer surfaces of the upper mold core group 4, the middle mold core 5 and the lower mold core 6 are all provided with annular grooves. On the inner surface of the mounting hole 11 on the template 1, a protrusion that matches the annular groove is integrally formed at the position corresponding to the annular groove, thereby improving the fitting accuracy between the mold core 3 and the template 1.

[0034] like Figures 1 to 5 As shown, in some embodiments of the present invention, template 1 includes a lower template, a middle template, and an upper template arranged sequentially from bottom to top; template 1 adopts a conventional template structure, which will not be described in detail here.

[0035] This invention provides a flashless leather bowl replica mold. Through the ingenious design of the mold core and template, and the establishment of an independent pressure-bearing structure, the product demolding process is simplified, completely eliminating subsequent punching and trimming processes. This ensures the dimensional accuracy and surface quality of the leather bowl during the replica molding process, successfully achieving domestic production of flashless leather bowl replica molds. The replica mold manufacturing cycle is only 60 days, half the 120 days required for foreign procurement; the manufacturing cost is 250,000 yuan, compared to 550,000 yuan per set for imported molds, saving 55%.

[0036] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

[0037] In the description of the application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more.

[0038] In the description of the application, unless otherwise specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0039] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. A flashless skin bowl complex mold characterized by, The utility model relates to a mould core (3) is arranged on the template (1) and is uniformly distributed, and the mould core (3) includes upper mould core group (4), middle mould core (5) and lower mould core (6) from top to bottom are arranged in sequence, and the upper mould core group (4), middle mould core (5) and lower mould core (6) form model cavity (7) between them. The upper mould core group (4) includes upper mould inner core (42) and upper mould core (43) that is sleeved on the outside of the upper mould inner core (42), and the upper mould core (43) is equipped with injection hole (41) that is communicated with model cavity (7) on it. The combination surface of the lower mould core (6) and the upper mould inner core (42) and the combination surface of the lower mould core (6) and the middle mould core (5) are equipped with radial exhaust pattern (9). The radial exhaust pattern (9) includes a plurality of exhaust grooves, and a plurality of exhaust grooves extend from the center to the edge of the combination surface.

2. A flashless skin bowl compound die according to claim 1, wherein, The upper mould core (43) and the upper mould inner core (42) are gap fit.

3. A flashless skin bowl compound die according to claim 1 wherein, The template (1) is equipped with installation hole (11) that is matched with the mould core (3).

4. The no-flash skin bowl multi-mold mold of claim 1, wherein, The mould core (3) and the installation hole (11) on the template (1) are gap fit.

5. A flashless skin bowl compound die according to claim 4 wherein, The lower mould core (6) is equipped with center exhaust hole (61) in the top center.

6. A no-flash skin bowl complex mold according to claim 1, wherein The middle mould core (5) includes middle mould core shell (51), and the inner surface of the middle mould core shell (51) is equipped with annular protrusion A (52), and the annular protrusion A (52) is arranged between the upper mould core (43) and the lower mould core (6).

7. The no-flash skin bowl multi-mold mold of claim 1, wherein, The lower end of the outer surface of the upper mould core (43) is equipped with annular groove A (431) that is matched with the middle mould core shell (51).

8. A flashless skin bowl complex mold according to claim 7, wherein The lower mould core (6) includes lower mould core base (63), middle step (64) and upper layer step (65) that are connected in sequence from bottom to top and gradually reduce in outer diameter.

9. A flashless skin bowl compound die according to claim 7, wherein, The lower end of the outer surface of the middle mould core shell (51) is sleeved on the outside of the middle step (64). The outer surface of the upper mould inner core (42) is equipped with a plurality of annular protrusions B (421), and the inner surface of the upper mould core (43) is equipped with annular protrusion C (432) at the position corresponding to the annular protrusion B (421).

10. The no-flash skin bowl multi-mold mold of claim 1, wherein, ​

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