A mold with a vacuum extraction structure

Abstract

The utility model relates to mould technical field especially relates to a mould with vacuumizing structure, upper die, lower die, forming block module, first limit structure and second limit structure are provided with vacuum cavity between upper die and lower die, the vacuum cavity is provided with the limit groove, and the forming block module is clamped and set in the limit groove, the first limit structure is set in both sides of forming block module and is connected with forming block module, and the second limit structure is set in one end of limit groove, the utility model discloses through setting the vacuum cavity between upper die and lower die, has realized the effective exclusion to gas residue, has solved the product defect caused by gas residue, has improved product quality. Meanwhile, through the clamping of forming block module in the limit groove, the first limit structure and the second limit structure limit and connect, the positioning accuracy and stability of forming block module are guaranteed together, the module displacement problem is solved, and the size precision of product and reliable operation of mould are ensured.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold with a vacuuming structure. Background Technology

[0002] Traditional plastic and composite molding dies, especially injection molds, often face two major technical challenges in the production process. First, it is difficult to guarantee the quality of the molded product. With the increasing demand for high-precision and complex structural products, the gases trapped inside the mold cavity, as well as the gases generated by the volatilization of molten material due to heating, are difficult to completely expel during injection or filling. These gases often become trapped inside the product, forming defects such as bubbles, porosity, or poor welds, which seriously affect the product's mechanical properties, surface finish, and ultimate reliability.

[0003] Secondly, there is the issue of mold structure stability and precision. Many complex molds require modular molding blocks to form complex cavities within the product or for side core pulling. However, under the high temperature and pressure of injection molding, these molding block modules are prone to slight displacement or loosening due to uneven stress or imperfect limiting structures. This displacement not only leads to dimensional deviations or even flash in the molded product, but also accelerates the wear of related mold components, reduces the mold's lifespan, and may cause production interruptions.

[0004] Therefore, it is urgent to solve the product defects caused by gas residue and to ensure the positioning accuracy and stability of the molded block module. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a mold with a vacuum structure. By setting a vacuum cavity between the upper and lower molds, residual gas is effectively eliminated, solving product defects caused by residual gas and improving product quality. Simultaneously, the molding block module is secured in the limiting groove, with a first limiting structure and a second limiting structure providing restriction and connection, jointly ensuring the positioning accuracy and stability of the molding block module, solving the module displacement problem, and ensuring the dimensional accuracy of the product and the reliable operation of the mold.

[0006] To achieve the above objectives, this utility model provides a mold with a vacuuming structure, comprising an upper mold, a lower mold, a forming block module, a first limiting structure, and a second limiting structure. A vacuum cavity is provided between the upper mold and the lower mold; A limiting groove is provided inside the vacuum cavity, and the molding block module is engaged in the limiting groove; The first limiting block is disposed on both sides of the molding block module and connected to the molding block module to limit the displacement of the molding block module; The second limiting structure is disposed at one end of the limiting groove and is used to restrict the molding block module within the limiting groove.

[0007] Preferably, the molding block module includes a first guide block, a second guide block, and a third guide block; The first guide block is provided with a first limiting part, a second limiting part and a first forming part, the second guide block is provided with a second forming part, and the third guide block is provided with a third forming part; The limiting groove is provided in the lower mold; The limiting groove is provided with a limiting step, and the first limiting part abuts against the limiting step; the second guide block and the third guide block are both locked in the second limiting part; The first forming part, the second forming part, and the third forming part are joined together to form a forming cavity.

[0008] Preferably, the second limiting part is provided with a first inclined surface and a second inclined surface; The second guide block has a first mating surface corresponding to the first inclined surface, and the third guide block has a second mating surface corresponding to the first inclined surface; The first inclined surface abuts against the first mating surface, and the second inclined surface abuts against the second mating surface.

[0009] Preferably, the second limiting structure is a limiting plate, which is connected to the outside of the limiting groove and abuts against the first guide block.

[0010] Preferably, the first limiting structure includes a locking block, an alignment limiting block, and a pressing block; The locking block is fixed to the lower mold and abuts against the side of the first guide block; The alignment limiting block is fixed to the locking block and is used to dock with the upper mold; The pressure block is connected to the lower mold and presses against one side of the locking block.

[0011] Preferably, the locking block has a fixing groove on the side facing the limiting groove for abutting against the second guide block and the third guide block respectively, and the second guide block and the third guide block are connected by bolts.

[0012] Preferably, both the second guide block and the third guide block are provided with a locking block, and a locking groove is provided in the fixing groove, and the locking block is locked in the locking groove.

[0013] Preferably, the top of the alignment limiting block is provided with an alignment block, and the upper mold is provided with an alignment groove corresponding to the alignment block, and the alignment block is fitted into the alignment groove.

[0014] Preferably, the lower module is provided with a boss, and one side of the locking block is provided with a pressing edge. The pressing block is connected to the boss and pressed against the pressing edge.

[0015] Preferably, the locking block is provided with an inclined slot, the alignment limiting block is provided with an inclined guide bar, and the alignment limiting block is inserted into the inclined slot through the inclined guide bar.

[0016] The beneficial effects of this invention are as follows: By setting a vacuum cavity between the upper and lower molds, residual gas is effectively eliminated, solving product defects caused by residual gas and improving product quality. Simultaneously, by securing the molding block module in the limiting groove, and with the first and second limiting structures providing restriction and connection, the positioning accuracy and stability of the molding block module are ensured, solving the module displacement problem and ensuring the dimensional accuracy of the product and the reliable operation of the mold. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the exploded structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the lower mold and forming block module of this utility model.

[0019] Figure 3 This is an exploded structural diagram of the lower mold, forming block module, and first limiting structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the upper mold of this utility model.

[0021] The reference numerals in the figures include: 1. Upper mold; 11. Alignment groove; 2. Lower mold; 21. Boss; 3. Molding block module; 31. First guide block; 311. First limiting part; 312. Second limiting part; 313. First forming part; 314. First inclined surface; 315. Second inclined surface; 32. Second guide block; 321. Second forming part; 322. First mating surface; 33. Third guide block; 331. Third forming part; 332. Second mating surface; 34. Locking block; 4. First limiting structure; 41. Locking block; 411. Fixing groove; 412. Card slot; 413. Pressing edge; 414. Angled slot; 42. Alignment limiting block; 421. Alignment block; 422. Angled guide bar; 43. Pressing block; 5. Second limiting structure; 100. Vacuum chamber; 101. Limiting groove; 102. Limiting step. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1 to 4 As shown, the present invention provides a mold with a vacuuming structure, comprising an upper mold 1, a lower mold 2, a forming block module 3, a first limiting structure 4, and a second limiting structure 5.

[0024] A vacuum chamber 100 is provided between the upper mold 1 and the lower mold 2; the vacuum chamber 100 enables the vacuuming operation of the mold cavity area. Through the vacuum chamber 100, the mold can effectively expel the gas in the cavity during the molding process, which is expected to reduce defects such as bubbles and pores inside the product, thereby improving the quality of the molded product.

[0025] A limiting groove 101 is provided inside the vacuum chamber 100, and the molding block module 3 is locked in the limiting groove 101; The second limiting structure 5 is disposed at one end of the limiting groove 101 and is used to limit the molding block module 3 within the limiting groove 101. The first limiting structure 4 is disposed on both sides of the molding block module 3 and connected to the molding block module 3, and is used to limit the displacement of the molding block module 3.

[0026] The second limiting structure 5 restricts the movement of the molding block module 3 at one end within the limiting groove 101, and the first limiting structure 4 restricts the displacement of both sides of the molding block module 3, thereby jointly ensuring the precise locking and stability of the position of the molding block module 3 during the molding process, effectively preventing it from loosening or shifting under injection pressure, and ensuring the dimensional accuracy of the molded product and the safe operation of the mold.

[0027] During operation, the upper mold 1 and lower mold 2 close to form the product cavity. At this time, the molding block module 3 is accurately positioned in the limiting groove 101 within the vacuum chamber 100 and is precisely constrained by the first limiting structure 4 and the second limiting structure 5. The second limiting structure 5 restricts the movement of the molding block module 3 at one end within the limiting groove 101, while the first limiting structure 4 firmly connects and restricts it from both sides, ensuring the positional stability and accuracy of the molding block module 3 under high-pressure injection.

[0028] Before or simultaneously with the injection (or molding) of material into the cavity, the mold activates a vacuum system. Through the connection with the vacuum chamber 100 between the upper mold 1 and the lower mold 2, the interior and surrounding space of the cavity are evacuated to a vacuum state, effectively eliminating residual air and gases generated by material decomposition in the cavity.

[0029] Subsequently, molten material is injected (or filled) into the cavity. Because the cavity is under vacuum or low pressure, the material can smoothly, quickly, and completely fill every corner of the cavity, avoiding gas trapping and defects such as bubbles and pores. During the material filling and pressure holding process, the molding block module 3 is always protected by the first limiting structure 4 and the second limiting structure 5, ensuring the dimensional accuracy of the product.

[0030] like Figure 2 and Figure 3 As shown, the molding block module 3 in this embodiment includes a first guide block 31, a second guide block 32 and a third guide block 33.

[0031] The first guide block 31 is provided with a first limiting part 311, a second limiting part 312 and a first forming part 313, the second guide block 32 is provided with a second forming part 321, and the third guide block 33 is provided with a third forming part 331.

[0032] The limiting groove 101 is set on the lower mold 2, and the limiting groove 101 is set on the lower mold 2 to provide a stable mounting base for the molding block module 3.

[0033] A limiting step 102 is provided within the limiting groove 101. The first limiting part 311 abuts against the limiting step 102, and the second guide block 32 and the third guide block 33 are both engaged within the second limiting part 312. Through the abutment between the limiting step 102 within the limiting groove 101 and the first limiting part 311, and the engagement of the second guide block 32 and the third guide block 33 within the second limiting part 312, the precise positioning and mutual constraint of the forming block module 3 (including the first guide block 31, the second guide block 32, and the third guide block 33) in the vertical and horizontal directions are achieved. This effectively ensures the dimensional accuracy and structural stability of the forming cavity formed by the splicing of the first forming part 313, the second forming part 321, and the third forming part 331 during the forming process, and solves the module displacement problem mentioned in the background art.

[0034] The first forming part 313, the second forming part 321 and the third forming part 331 are joined together to form a forming cavity.

[0035] The modular assembly of the first forming part 313, the second forming part 321 and the third forming part 331 enables the realization of complex structures or high-precision requirements of the forming cavity, which facilitates the manufacturing, assembly and subsequent maintenance and replacement of the mold.

[0036] like Figure 2 As shown, the second limiting part 312 in this embodiment is provided with a first inclined surface 314 and a second inclined surface 315.

[0037] The second guide block 32 is provided with a first mating surface 322 corresponding to the first inclined surface 314, and the third guide block 33 is provided with a second mating surface 332 corresponding to the first inclined surface 314. The first inclined surface 314 abuts against the first mating surface 322, and the second inclined surface 315 abuts against the second mating surface 332. When the mold is closed or subjected to injection pressure, a locking force pointing towards the center of the cavity is generated. This greatly improves the radial positioning accuracy and stability of the second guide block 32 and the third guide block 33 relative to the first guide block 31, solves the problem of minor displacement that may occur when the molding block module 3 is under force, and ensures the dimensional accuracy and tight fit of the molding cavity formed by the splicing of the first molding part 313, the second molding part 321, and the third molding part 331.

[0038] In this embodiment, the second limiting structure 5 is a limiting plate, which is connected to the outside of the limiting groove 101 and abuts against the first guide block 31. By using a limiting plate for the second limiting structure 5, the structure is simple and easy to process and install. The second limiting structure 5 abuts against the first guide block 31, causing the first limiting part 311 to abut against the limiting step 102, thereby confining the first guide block 31 within the limiting groove 101. This enhances the axial positioning accuracy and stability of the entire molding block module 3, thus ensuring the dimensional accuracy of the product and the reliable operation of the mold.

[0039] Specifically, the second limiting structure 5 is bolted to the lower mold 2, located outside the limiting groove 101 and abutting against the first guide block 31. This achieves the abutting between the second limiting structure 5 and the first guide block 31, causing the first limiting part 311 to abut against the limiting step 102, thereby restricting the first guide block 31 within the limiting groove 101.

[0040] The first limiting structure 4 in this embodiment includes a locking block 41, an alignment limiting block 42, and a pressing block 43.

[0041] The locking block 41 is fixed to the lower mold 2 and abuts against the side of the first guide block 31; it provides strong lateral support and limit for the first guide block 31, effectively preventing the first guide block 31 from shifting laterally.

[0042] The alignment limiting block 42 is fixed to the locking block 41 and is used to mate with the upper mold 1. This allows the first limiting structure 4 to simultaneously serve as the alignment element for the upper and lower molds 2 when the mold is closed. This ensures the precise spatial fit and positioning of the forming block module 3 on the lower mold 2 and the upper mold 1, avoiding mismatch of the forming cavity or flash caused by mold misalignment, thereby improving the dimensional accuracy of the formed product and the operational safety of the mold.

[0043] The pressure block 43 is connected to the lower mold 2 and pressed against one side of the locking block 41, so that the locking block 41 is fixed to the lower mold 2, thereby enhancing the fixing strength and stability of the locking block 41.

[0044] In this embodiment, the locking block 41 is provided with a fixing groove 411 on the side facing the limiting groove 101 for contacting the second guide block 32 and the third guide block 33 respectively. The second guide block 32 and the third guide block 33 are both connected by bolts.

[0045] The locking block 41 abuts against the second guide block 32 and the third guide block 33 through the fixing groove 411 on the locking block 41, so that the locking block 41 not only restricts the first guide block 31, but also applies lateral support and restriction to the second guide block 32 and the third guide block 33. This enhances the overall rigidity and resistance to lateral displacement of the entire molding block module 3.

[0046] The bolted connection allows for easy disassembly and replacement of the second guide block 32 and the third guide block 33. This facilitates mold maintenance, repair, and quick mold changes for different products, thereby improving mold lifespan and production efficiency.

[0047] In this embodiment, both the second guide block 32 and the third guide block 33 are provided with locking blocks 34, and a locking groove 412 is provided in the fixing groove 411, with the locking blocks 34 locked in the locking groove 412. By locking the locking blocks 34 in the locking groove 412, the second guide block 32 and the third guide block 33 are connected to the fixing groove 411. This enhances the tightness and positioning accuracy of the connection between the second guide block 32 and the third guide block 33 and the locking block 41, greatly improving the overall resistance to high-pressure impact and displacement of the molding block module 3.

[0048] In this embodiment, the alignment limiting block 42 is provided with an alignment block 421 on its top, and the upper mold 1 is provided with an alignment groove 11 corresponding to the alignment block 421, with the alignment block 421 fitting into the alignment groove 11. By fitting the alignment block 421 into the alignment groove 11, precise and rapid alignment and locking of the alignment limiting block 42 and the upper mold 1 are achieved during mold closing. This ensures a high-precision fit between the forming block module 3 on the lower mold 2 and the cavity portion of the upper mold 1, significantly improving the overall fitting accuracy of the mold and the dimensional accuracy of the forming cavity.

[0049] In this embodiment, a boss 21 is provided inside the lower mold 2 block, and a pressing edge 413 is provided on one side of the locking block 41. The pressing block 43 is connected to the boss 21 and pressed against the pressing edge 413. By connecting the pressing block 43 to the boss 21 in the lower mold 2 block and applying a stable and strong pressing action to the pressing edge 413 on one side of the locking block 41, the fixing strength and resistance to lateral displacement of the locking block 41 are greatly enhanced. This allows the locking block 41 to abut against the first guide block 31 more stably, thereby significantly improving the lateral support and limiting accuracy of the first limiting structure 4 for the entire molding block module 3.

[0050] Specifically, the pressure block 43 and the boss 21 are connected by bolts. The bolt connection allows the pressure block 43 and the boss 21 to be easily disassembled.

[0051] In this embodiment, the locking block 41 is provided with an inclined slot 414, and the alignment limiting block 42 is provided with an inclined guide bar 422. The alignment limiting block 42 is inserted into the inclined slot 414 through the inclined guide bar 422. This allows the alignment limiting block 42 to achieve automatic tilting guidance and tight wedging during the insertion process. It eliminates the assembly gap between the alignment limiting block 42 and the locking block 41, significantly improving the positioning accuracy and connection rigidity of the alignment limiting block 42 relative to the locking block 41. This ensures the accuracy of the alignment limiting block 42 when docking with the upper mold 1.

[0052] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A mold with a vacuuming structure, characterized in that, It includes an upper mold (1), a lower mold (2), a forming block module (3), a first limiting structure (4), and a second limiting structure (5). A vacuum cavity (100) is provided between the upper mold (1) and the lower mold (2); A limiting groove (101) is provided inside the vacuum chamber (100), and the molding block module (3) is engaged in the limiting groove (101). The first limiting structure (4) is disposed on both sides of the molding block module (3) and connected to the molding block module (3) to limit the displacement of the molding block module (3); The second limiting structure (5) is disposed at one end of the limiting groove (101) and is used to limit the molding block module (3) within the limiting groove (101).

2. The mold with a vacuuming structure according to claim 1, characterized in that, The molding block module (3) includes a first guide block (31), a second guide block (32) and a third guide block (33); The first guide block (31) is provided with a first limiting part (311), a second limiting part (312) and a first forming part (313), the second guide block (32) is provided with a second forming part (321), and the third guide block (33) is provided with a third forming part (331). The limiting groove (101) is provided on the lower mold (2); A limiting step (102) is provided in the limiting groove (101), and the first limiting part (311) abuts against the limiting step (102); the second guide block (32) and the third guide block (33) are both locked in the second limiting part (312); The first forming part (313), the second forming part (321) and the third forming part (331) are joined together to form a forming cavity.

3. A mold with a vacuuming structure according to claim 2, characterized in that, The second limiting part (312) is provided with a first inclined surface (314) and a second inclined surface (315); The second guide block (32) is provided with a first mating surface (322) corresponding to the first inclined surface (314), and the third guide block (33) is provided with a second mating surface (332) corresponding to the first inclined surface (314). The first inclined surface (314) abuts against the first mating surface (322), and the second inclined surface (315) abuts against the second mating surface (332).

4. A mold with a vacuuming structure according to claim 2 or 3, characterized in that, The second limiting structure (5) is a limiting plate. The second limiting structure (5) is connected to the outside of the limiting groove (101) and abuts against the first guide block (31).

5. A mold with a vacuuming structure according to claim 2, characterized in that, The first limiting structure (4) includes a locking block (41), an alignment limiting block (42), and a pressing block (43). The locking block (41) is fixed to the lower mold (2) and abuts against the side of the first guide block (31); The alignment limiting block (42) is fixed to the locking block (41) and is used to dock with the upper mold (1); The pressure block (43) is connected to the lower mold (2) and pressed against one side of the locking block (41).

6. A mold with a vacuuming structure according to claim 5, characterized in that, The locking block (41) is provided with a fixing groove (411) on the side facing the limiting groove (101) for abutting against the second guide block (32) and the third guide block (33) respectively. The second guide block (32) and the third guide block (33) are connected by bolts.

7. A mold with a vacuuming structure according to claim 6, characterized in that, Both the second guide block (32) and the third guide block (33) are provided with a locking block (34), and a locking groove (412) is provided in the fixing groove (411), and the locking block (34) is locked in the locking groove (412).

8. A mold with a vacuuming structure according to claim 5 or 6, characterized in that, The alignment limit block (42) is provided with an alignment block (421) on its top, and the upper mold (1) is provided with an alignment groove (11) corresponding to the alignment block (421), and the alignment block (421) is fitted into the alignment groove (11).

9. A mold with a vacuuming structure according to claim 5, characterized in that, The lower mold (2) block is provided with a boss (21), and a pressing edge (413) is provided on one side of the locking block (41). The pressing block (43) is connected to the boss (21) and pressed against the pressing edge (413).

10. A mold with a vacuuming structure according to claim 5, characterized in that, The locking block (41) is provided with a slanted slot (414), and the alignment limiting block (42) is provided with a slanted guide bar (422). The alignment limiting block (42) is inserted into the slanted slot (414) through the slanted guide bar (422).

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