Outer expansion core structure of injection mold
By setting multiple sets of expanding core inclined tops of the injection mold to expand outward, the problem of gaps required when putting into the core assembly of the existing injection mold is solved, and the effect of reducing the secondary cleaning process and reducing product manufacturing costs is achieved.
Patent Information
- Application Number
- CN202510387512.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-05-16
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing injection molds require a certain gap when put into the core assembly, resulting in peaks during the injection molding process and secondary cleaning is required in the later stage, which increases the product manufacturing cost.
An external expansion core structure of injection molds is designed. By setting up multiple sets of inclined tops of the inclined tops of the inclined tops of the inclined cores, the inclined tops expand to the outside, making the product easy to put in. When closing the mold, the inclined top mechanism moves to fit with the iron core surface to ensure that the iron core surface is clean and reduces the secondary cleaning process.
After the improvement of the injection mold structure, the secondary cleaning process is reduced, the product manufacturing cost is reduced, and the filling efficiency of the mold cavity is improved.
Smart Images
Figure CN120002937A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of external expansion core structures of injection molds, in particular to an external expansion core structure of an injection mold. Background Art
[0002] Injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise size. Injection mold is also a processing method used in mass production of parts, mainly used in the industrial field; the injection mold process is to inject the heated and melted material into the mold cavity by high pressure, and after cooling and solidification, a molded product is obtained. The injection mold core is a key component used in the injection mold. It is usually made of metal material and plays a role of fixing and supporting; because a certain gap is required to put the original core component into the mold, there will be a peak inside the gap during injection molding, and secondary cleaning will be performed later, which is time-consuming and labor-intensive, and increases the product manufacturing cost. Summary of the invention
[0003] The object of the present invention is to provide an external expansion core structure of an injection mold to solve the existing problems raised in the above background technology.
[0004] To achieve the above object, the present invention provides the following technical solution: an injection mold external expansion core structure, comprising an upper code template and a lower code template, the bottom of the upper code template is provided with an upper mold square iron, the top of the upper mold square iron is provided with a valve needle bottom plate and a valve needle fixing plate in sequence from top to bottom, and the bottom of the upper mold square iron is installed with an upper pad;
[0005] A flow channel cover plate is provided at the bottom of the upper pad plate, a main flow channel plate is provided at the bottom of the flow channel cover plate, and a feed nozzle is provided on the outer wall of the main flow channel plate, a branch flow channel plate is provided at the bottom of the main flow channel plate, a flow channel outer frame plate is installed on the outer side of the branch flow channel plate, an A plate is provided at the bottom of the flow channel outer frame plate, a B plate is provided at the bottom of the A plate, an iron core plate and a lower mold core are provided inside the B plate from top to bottom, a lower mold square iron is provided at the bottom edge of the B plate, and a core expansion inclined top drive plate, a lower mold ejector pin and the like are provided in sequence in the middle of the bottom of the B plate The lower mold square iron is wrapped around the outside of the core expansion inclined top driving plate, the lower mold ejector fixing plate and the lower mold ejector bottom plate. The bottom of the lower mold square iron is connected to the lower code template. A cavity is opened in the middle of the bottom of the core expansion inclined top driving plate, and a spring is arranged inside the cavity. The bottom of the spring is connected to the top of the lower mold ejector fixing plate. Multiple groups of core expansion inclined tops are arranged inside the core plate. The core expansion inclined top driving plate is connected to the core expansion inclined top. A notch is arranged inside the core plate, and a product is arranged inside the notch.
[0006] Preferably, a through hole is opened on one side of the upper code template and the upper mold square iron, a first threaded hole is opened on one side of the top of the upper pad, and the inside of the through holes on the upper code template and the upper mold square iron are threadedly connected with the first threaded hole on the upper pad through a first screw.
[0007] Preferably, a through opening is opened on one side inside the upper pad, a second threaded hole is opened on one side of the top of the flow channel cover plate, and the through opening on the upper pad is threadedly connected to the second threaded hole through a second screw.
[0008] Preferably, a third threaded hole is opened on one side of the flow channel cover plate, the main flow channel plate and the branch flow channel plate, and the flow channel cover plate, the main flow channel plate and the branch flow channel plate are threadedly connected to the threaded hole through a third screw, and a flow channel interface is provided on one side of the flow channel cover plate, the main flow channel plate and the branch flow channel plate.
[0009] Preferably, a fourth threaded hole is provided on one side of the lower code template and the inner side of the lower mold square iron and one side of the bottom of the B plate, and a fourth screw is provided inside the fourth threaded hole.
[0010] Preferably, a groove is provided inside the lower code template, and a limiting push rod is provided inside the groove.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the external expansion core structure of the injection mold improves the existing mold. When placing the core assembly, the inclined top expands outward to facilitate the placement of the product. When closing the mold, the inclined top mechanism moves to fit the core surface, ensuring that the core surface is clean when the mold cavity is filled with material, reducing the secondary cleaning process and reducing the product manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the present invention;
[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the expansion core inclined top of the present invention.
[0014] In the figure: 1. Upper code template; 2. Upper die square iron; 3. Valve needle bottom plate; 4. Valve needle fixing plate; 5. Upper pad plate; 6. Feed nozzle; 7. Flow channel cover plate; 8. Main flow channel plate; 9. Branch flow channel plate; 10. Flow channel outer frame plate; 11. A plate; 12. B plate; 13. Iron core plate; 14. Lower die core; 15. Expanding core inclined ejector drive plate; 16. Lower die square iron; 17. Lower die ejector pin fixing plate; 18. Lower die ejector pin bottom plate; 19. Lower code template; 20. Spring; 21. Expanding core inclined ejector; 22. Product. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0016] See also Figure 1-2 , the embodiment provided by the present invention: an injection mold external expansion core structure, comprising an upper code template 1 and a lower code template 19, the bottom of the upper code template 1 is provided with an upper mold square iron 2, the top of the upper mold square iron 2 is provided with a valve needle bottom plate 3 and a valve needle fixing plate 4 in sequence from top to bottom, and the bottom of the upper mold square iron 2 is installed with an upper pad 5;
[0017] A flow channel cover plate 7 is provided at the bottom of the upper pad 5, a main flow channel plate 8 is provided at the bottom of the flow channel cover plate 7, and a feed nozzle 6 is provided on the outer wall of the main flow channel plate 8, a branch flow channel plate 9 is provided at the bottom of the main flow channel plate 8, a flow channel outer frame plate 10 is installed on the outer side of the branch flow channel plate 9, an A plate 11 is provided at the bottom of the flow channel outer frame plate 10, a B plate 12 is provided at the bottom of the A plate 11, an iron core plate 13 and a lower mold core 14 are provided inside the B plate 12 from top to bottom, a lower mold square iron 16 is provided at the bottom edge of the B plate 12, and a core expansion inclined top driving plate 15, a lower mold ejector pin fixing plate 14 are provided in sequence in the middle of the bottom of the B plate 12 7 and the lower die ejector bottom plate 18, the lower die square iron 16 is wrapped around the outside of the core expansion inclined ejector driving plate 15, the lower die ejector fixing plate 17 and the lower die ejector bottom plate 18, the bottom of the lower die square iron 16 is connected with the lower code template 19, a cavity is opened in the middle of the bottom of the core expansion inclined ejector driving plate 15, and a spring 20 is arranged inside the cavity, the bottom of the spring 20 is connected to the top of the lower die ejector fixing plate 17, a plurality of groups of core expansion inclined ejectors 21 are arranged inside the core plate 13, the core expansion inclined ejector driving plate 15 is connected with the core expansion inclined ejector 21, a notch is arranged inside the core plate 13, and a product 22 is arranged inside the notch.
[0018] A through hole is opened on one side of the upper code template 1 and the upper mold square iron 2, and a first threaded hole is opened on one side of the top of the upper pad 5. The interior of the through holes on the upper code template 1 and the upper mold square iron 2 is threadedly connected with the first threaded hole on the upper pad 5 through a first screw, and the first screw is screwed into the interior of the first threaded hole to achieve the connection effect of the upper code template 1, the upper mold square iron 2 and the upper pad 5.
[0019] A through hole is opened on one side of the inner part of the upper pad 5, and a second threaded hole is opened on one side of the top of the flow channel cover plate 7. The through hole on the upper pad 5 is threadedly connected to the second threaded hole through a second screw, and the upper pad is screwed to the flow channel cover plate 7 through the second screw.
[0020] A third threaded hole is provided on one side of the flow channel cover plate 7, the main flow channel plate 8 and the branch flow channel plate 9, and the flow channel cover plate 7, the main flow channel plate 8 and the branch flow channel plate 9 are threadedly connected to the threaded hole through a third screw, and a flow channel interface is provided on one side of the flow channel cover plate 7, the main flow channel plate 8 and the branch flow channel plate 9 for external pipes.
[0021] A fourth threaded hole is provided on one side inside the lower code template 19 and the lower mold square iron 16 and on one side at the bottom of the B plate 12, and a fourth screw is provided inside the fourth threaded hole, through which the lower code template 19, the lower mold square iron 16 and the B plate 12 are connected together.
[0022] A groove is formed inside the lower code template 19 , and a limiting ejector rod is arranged inside the groove to limit the lower die ejector pin bottom plate 18 .
[0023] Working principle: This injection mold is improved on the existing mold. When placing the core assembly, the core expansion lifter 21 expands outward to facilitate the placement of the product. When closing the mold, the lifter mechanism moves to fit the core surface, ensuring that the core surface is clean when the mold cavity is filled with material, reducing the secondary cleaning process and reducing product manufacturing costs.
[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0025] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. An injection mold external expansion core structure, comprising an upper code template (1) and a lower code template (19), characterized in that: An upper mold square iron (2) is arranged at the bottom of the upper code template (1), a valve needle bottom plate (3) and a valve needle fixing plate (4) are arranged in sequence from top to bottom at the top of the interior of the upper mold square iron (2), and an upper pad (5) is installed at the bottom of the upper mold square iron (2); A flow channel cover plate (7) is arranged at the bottom of the upper pad (5), a main flow channel plate (8) is arranged at the bottom of the flow channel cover plate (7), and a feed nozzle (6) is arranged on the outer wall of the main flow channel plate (8), a branch flow channel plate (9) is arranged at the bottom of the main flow channel plate (8), a flow channel outer frame plate (10) is installed on the outer side of the branch flow channel plate (9), an A plate (11) is arranged at the bottom of the flow channel outer frame plate (10), a B plate (12) is arranged at the bottom of the A plate (11), an iron core plate (13) and a lower mold core (14) are arranged inside the B plate (12) from top to bottom, a lower mold square iron (16) is arranged at the bottom edge of the B plate (12), and a core expansion inclined top drive plate (15), a lower mold (14) and a lower mold (14) are arranged in sequence in the middle of the bottom of the B plate (12). The invention relates to a mold comprising an ejector pin fixing plate (17) and a lower mold ejector pin bottom plate (18); the lower mold square iron (16) is wrapped around the outside of the core expansion inclined ejector driving plate (15), the lower mold ejector pin fixing plate (17) and the lower mold ejector pin bottom plate (18); the bottom of the lower mold square iron (16) is connected to a lower code template (19); a cavity is opened in the middle of the bottom of the core expansion inclined ejector driving plate (15), and a spring (20) is arranged inside the cavity; the bottom of the spring (20) is connected to the top of the lower mold ejector pin fixing plate (17); a plurality of groups of core expansion inclined ejectors (21) are arranged inside the core plate (13); the core expansion inclined ejector driving plate (15) is connected to the core expansion inclined ejector (21); a notch is arranged inside the core plate (13), and a product (22) is arranged inside the notch.
2. The external expansion core structure of an injection mold according to claim 1, characterized in that: A through hole is provided on one side of the interior of the upper code template (1) and the upper mold square iron (2), a first threaded hole is provided on one side of the top of the upper pad (5), and the interior of the through holes on the upper code template (1) and the upper mold square iron (2) are threadedly connected to the first threaded hole on the upper pad (5) via a first screw.
3. The external expansion core structure of an injection mold according to claim 1, characterized in that: A through opening is provided on one side of the interior of the upper pad (5), a second threaded hole is provided on one side of the top of the flow channel cover plate (7), and the through opening on the upper pad (5) is threadedly connected to the second threaded hole via a second screw.
4. The external expansion core structure of an injection mold according to claim 1, characterized in that: A third threaded hole is provided on one side of the flow channel cover plate (7), the main flow channel plate (8) and the branch flow channel plate (9), and the flow channel cover plate (7), the main flow channel plate (8) and the branch flow channel plate (9) are threadedly connected to the threaded hole via a third screw, and a flow channel interface is provided on one side of the flow channel cover plate (7), the main flow channel plate (8) and the branch flow channel plate (9).
5. The external expansion core structure of an injection mold according to claim 1, characterized in that: A fourth threaded hole is provided on one side of the lower code template (19) and the lower mold square iron (16) and one side of the bottom of the B plate (12), and a fourth screw is provided inside the fourth threaded hole.
6. The external expansion core structure of an injection mold according to claim 1, characterized in that: A groove is formed inside the lower code template (19), and a limiting push rod is arranged inside the groove.