Injection mold with inner side core-pulling structure
By adopting a combined structure of slider seat, oil cylinder and push plate in the injection mold, the problem of short and unstable inner core extraction distance in the prior art is solved, and long-distance inner core extraction and large-scale production of plastic products is realized. reliability.
Patent Information
- Application Number
- CN202420195459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The existing inner core pulling structure is difficult to achieve long-distance core pulling of the plastic parts during injection molding, which is easy to damage and is not suitable for large-scale production.
An injection mold with an inner core pulling structure was designed, and a combined structure of a slider seat, an oil cylinder and a push plate is adopted. The slider seat is driven to move in the rear mold insert through the oil cylinder to realize the inner core pulling of the slider needle. , ensure the stability and accuracy of the core extraction process.
The long-distance internal side core extraction of plastic products is achieved, and the core extraction process is stable and reliable, avoiding structural damage, and is suitable for large-scale production.
Smart Images
Figure CN222135838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding, in particular to an injection mold with an inner core pulling structure. Background Art
[0002] An injection mold is a tool for producing plastic products by injection molding. It is usually used for mass production of certain parts with complex shapes, and plays a role in giving plastic products a complete structure and precise size. In the actual production process, the heated and melted plastic is usually injected into the mold cavity of the injection mold by an injection molding machine at high pressure. After cooling and solidification, the molded product is ejected. Due to various process requirements of plastic parts, it is sometimes necessary to open holes or grooves on the side walls of the plastic parts. Accordingly, the injection mold needs to be provided with a corresponding side core pulling mechanism for molding, so that the molded product can be ejected from the side with the help of the side core pulling mechanism during the mold opening process, so as to achieve the purpose of forming structures such as holes or grooves on the plastic parts.
[0003] During injection molding of some plastic parts with special structures (such as negative pressure bottles), the core cannot be pulled directly from the outside of the plastic parts due to the internal grooves inside the plastic parts. In the existing inner core pulling mechanism, an inclined core pulling structure is usually used, and the core pulling distance is short. When performing the inner core pulling operation, if the core pulling distance is long, a larger core pulling taper or core pulling rod length needs to be set. The core pulling structure is easily damaged and unstable, and is not suitable for mass production. Utility Model Content
[0004] Based on this, the purpose of the utility model is to provide an injection mold with an inner core pulling structure to address the deficiencies of the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An injection mold with an inner core pulling structure comprises a front template and a rear template, a core pulling assembly is installed between the front template and the rear template, and is characterized in that the core pulling assembly comprises a rear mold insert and a slider seat that cooperate with each other, a slider groove for the movement of the slider seat is opened in the rear mold insert, a slider insert pin is connected to the head end of the slider seat, and an oil cylinder is connected to the tail end of the slider seat, and the rear mold insert is installed on the rear template through a rear mold insert fixing plate.
[0007] As a further improvement of the utility model, a pin insert hole and an insert groove are provided on the slider seat, the slider pin is installed in the pin insert hole, and a slider insert for fixing the slider pin is installed in the insert groove.
[0008] As a further improvement of the utility model, the oil cylinder is connected to a cylinder pull rod, the slider seat is provided with a pull rod groove matching with the oil cylinder pull rod, and the slider seat and the oil cylinder are fixedly connected through the oil cylinder pull rod and the pull rod groove.
[0009] As a further improvement of the utility model, a cylinder fixing seat is connected to the rear template, and the cylinder is installed on the rear template through the cylinder fixing seat.
[0010] As a further improvement of the utility model, a shovel base is installed on the front template, and a shovel base groove matching with the shovel base is opened on the slider seat.
[0011] As a further improvement of the utility model, a push plate is provided between the front template and the rear template, and a rear mold core for positioning the rear mold insert and the slider seat is provided inside the push plate.
[0012] As a further improvement of the utility model, a rear mold insert is installed on the rear mold core.
[0013] As a further improvement of the utility model, a ejector plate is provided at the bottom end of the rear template, a return pin is connected to the ejector plate, and the end of the return pin is connected to the push plate by a thread.
[0014] As a further improvement of the utility model, a front mold core is arranged inside the front mold plate, and a front mold inserting pin is arranged inside the front mold core.
[0015] As a further improvement of the utility model, the rear mold insert fixing plate is provided with a rear mold insert pin that matches the rear mold core, and the slider seat is provided with a pin insert avoidance groove for the rear mold insert pin to pass through.
[0016] The beneficial effects of the utility model are:
[0017] 1. The utility model provides an injection mold with an inner core pulling structure. After the front mold plate and the push plate are separated, the slide block seat is driven by the oil cylinder to move in the rear mold insert, and the slide block needle completes the inner core pulling activity in the rear mold insert. Finally, the push plate pushes out the plastic product, thereby realizing the long-distance inner side core pulling of the plastic product. The demoulding distance is accurately adjustable, and the oil cylinder-assisted core pulling structure is simple, and the action is stable and reliable.
[0018] 2. The utility model has a slider groove for the movement of the slider seat in the rear mold insert, so that the slider insert pin at the head end of the slider seat can complete the inner core pulling and detaching of the plastic product inside the rear mold insert, and the plastic product will not be damaged during the core pulling process. The utility model has a simple structure and is easy to operate, which is more conducive to the production and application of large-scale products. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a cross-sectional view of the overall structure of the utility model.
[0021] Figure 2 It is a schematic diagram of the local structure of the core pulling component of the utility model.
[0022] Figure 3 It is a partial structural cross-sectional view of the core pulling component of the utility model.
[0023] Figure 4 It is an exploded view of the local structure of the core pulling component of the utility model.
[0024] In the figure: 1 is the front template, 2 is the rear template, 3 is the rear mold insert, 301 is the slider groove, 4 is the slider seat, 401 is the pin hole, 402 is the insert groove, 403 is the pull rod groove, 404 is the shovel base groove, 405 is the pin avoidance groove, 5 is the slider pin, 6 is the slider insert, 7 is the oil cylinder, 8 is the oil cylinder pull rod, 9 is the oil cylinder fixing seat, 10 is the shovel base, 11 is the rear mold insert fixing plate, 12 is the push plate, 13 is the rear mold core, 14 is the rear mold insert, 15 is the ejector plate, 16 is the return pin, 17 is the front mold core, 18 is the front mold pin, and 19 is the rear mold pin. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] like Figure 1 As shown, an injection mold with an inner core pulling structure includes a front template 1 and a rear template 2, a core pulling assembly is installed between the front template 1 and the rear template 2, and is characterized in that the core pulling assembly includes a rear mold insert 3 and a slider seat 4 that cooperate with each other, a slider groove 301 for the movement of the slider seat 4 is opened in the rear mold insert 3, a slider insert pin 5 is connected to the head end of the slider seat 4, and the slider insert pin 5 is used for core pulling of the inner structure molding of the plastic product, and the rear end of the slider seat 4 is connected to the cylinder 7, and the rear mold insert 3 is installed on the rear mold plate 2 through the rear mold insert fixing plate 11.
[0027] In a specific embodiment, further, a pin hole 401 and an insert groove 402 are opened on the slider seat 4, the slider pin 5 is installed in the pin hole 401, and a slider insert 6 for fixing the slider pin 5 is installed in the insert groove 402.
[0028] In a specific embodiment, further, the oil cylinder 7 is connected to a cylinder tie rod 8, the slider seat 4 is provided with a tie rod groove 403 matching with the oil cylinder tie rod 8, and the slider seat 4 and the oil cylinder 7 are fixedly connected via the oil cylinder tie rod 8 and the tie rod groove 403.
[0029] In a specific embodiment, further, the rear template 2 is connected with a cylinder fixing seat 9 , and the cylinder 7 is installed on the rear template 2 through the cylinder fixing seat 9 .
[0030] In a specific embodiment, further, a shovel base 10 is installed on the front template 1, and a shovel base groove 404 matching with the shovel base 10 is opened on the slider seat 4, and the shovel base 10 cooperates with the shovel base groove 404 to complete the fixation of the slider seat.
[0031] In a specific embodiment, further, a push plate 12 is provided between the front template 1 and the rear template 2, and a rear mold core 13 for positioning the rear mold insert 3 and the slider seat 4 is provided inside the push plate 12, and a molding glue position for injection molding of plastic products is provided on the rear mold core 13.
[0032] In a specific embodiment, further, a rear mold insert 14 is installed on the rear mold core 13 .
[0033] In a specific embodiment, further, a ejector plate 15 is provided at the bottom end of the rear template 2, a return pin 16 is connected to the ejector plate 15, and an end of the return pin 16 is connected to the push plate 12 by a thread.
[0034] In a specific embodiment, further, a front mold core 17 is arranged inside the front template 1, a molding glue position for injection molding of plastic products is arranged on the front mold core 17, a front mold insert pin 18 is arranged inside the front mold core 17, and the front mold core 17 and the front mold insert pin 18 are used to mold the front model cavity structure of the plastic product.
[0035] In a specific embodiment, further, the rear mold insert fixing plate 11 is provided with a rear mold insert pin 19 that cooperates with the rear mold core 13, and the rear mold insert pin 19 is used to form the rear mold cavity structure of the plastic product, and the slider seat 4 is provided with a pin avoidance groove 405 for the rear mold insert pin 19 to pass through.
[0036] Preferably, an injection space is formed in the injection mold by the cooperation of the front mold core, the rear mold core, the rear mold insert and the rear mold insert block, and a front mold insert pin is provided in the molding glue position of the front mold core and a rear mold insert pin is provided in the molding glue position of the rear mold core. The core pulling inside the plastic product is completed by the cooperation of the front mold insert pin, the rear mold insert pin and the slider insert pin.
[0037] The specific working process is as follows: when the mold is opening, the ejector plate 15 and the rear template 2 move with the movable plate of the injection molding machine, thereby driving the push plate 12 to separate from the front template 1. At this time, the shovel base 10 on the front template 1 is separated from the slider seat 4, and then the oil cylinder 7 drives the slider seat 4 to move inside the slider groove 301 on the rear mold insert 3 through the oil cylinder pull rod 8, so that the slider insert pin 5 is separated from the inner groove of the plastic product, and the core pulling action of the inner side of the plastic product is completed. Then the injection molding machine applies a thrust to the ejector plate 15, and the ejector plate 15 drives the push plate 12 to move upward through the return pin 16. The push plate 12 pushes the plastic product out of the rear mold insert through the rear mold core 13, and the plastic product demolding action is completed;
[0038] When the mold is closing, the ejector plate 15 drives the push plate 12 to reset through the return pin 16, and the cylinder 7 drives the slider seat 4 to move to the outside of the slider groove 301 on the rear mold insert 3 through the cylinder pull rod 8 to reset, and then the movable plate of the injection molding machine drives the ejector plate 15 and the rear mold plate 2 to close the mold, so that the push plate 12 and the front mold plate 1 are fit and reset. At this time, the shovel base 10 on the front mold plate 1 is combined with the slider seat 4 to fix the slider seat 4, and the front mold core 17, the rear mold core 13, the rear mold insert 3, the rear mold insert block 14 and the rear mold insert pin 5 and other components are completely fit, and the mold closing action is completed.
[0039] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
[0040] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
Claims
1. An injection mold with an inner core pulling structure, comprising a front mold plate (1) and a rear mold plate (2), wherein a core pulling assembly is installed between the front mold plate (1) and the rear mold plate (2), characterized in that: The core pulling assembly comprises a rear mold insert (3) and a slider seat (4) that cooperate with each other. A slider groove (301) for the slider seat (4) to move is provided in the rear mold insert (3). The head end of the slider seat (4) is connected to a slider insert pin (5), and the tail end of the slider seat (4) is connected to an oil cylinder (7). The rear mold insert (3) is mounted on the rear mold plate (2) via a rear mold insert fixing plate (11).
2. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: The slider seat (4) is provided with a pin-inserting hole (401) and an insert groove (402); the slider pin (5) is installed in the pin-inserting hole (401); and a slider insert (6) for fixing the slider pin (5) is installed in the insert groove (402).
3. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: The oil cylinder (7) is connected to a cylinder pull rod (8), the slider seat (4) is provided with a pull rod groove (403) matching with the oil cylinder pull rod (8), and the slider seat (4) and the oil cylinder (7) are fixedly connected via the oil cylinder pull rod (8) and the pull rod groove (403).
4. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: The rear template (2) is connected to a cylinder fixing seat (9), and the cylinder (7) is mounted on the rear template (2) via the cylinder fixing seat (9).
5. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: A shovel base (10) is installed on the front template (1), and a shovel base groove (404) matching with the shovel base (10) is provided on the slider seat (4).
6. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: A push plate (12) is provided between the front mold plate (1) and the rear mold plate (2), and a rear mold core (13) for positioning the rear mold insert (3) and the slider seat (4) is provided inside the push plate (12).
7. The injection mold with an inner core-pulling structure according to claim 6, characterized in that: A rear mold insert (14) is installed on the rear mold core (13).
8. The injection mold with an inner core-pulling structure according to claim 6, characterized in that: The bottom end of the rear template (2) is provided with an ejector plate (15), the ejector plate (15) is connected to a return pin (16), and the end of the return pin (16) is connected to the push plate (12) via a thread.
9. The injection mold with an inner core-pulling structure according to claim 1, characterized in that: A front mold core (17) is arranged inside the front mold plate (1), and a front mold inserting pin (18) is arranged inside the front mold core (17).
10. The injection mold with an inner core-pulling structure according to claim 6, characterized in that: The rear mold insert fixing plate (11) is provided with a rear mold insert pin (19) that matches the rear mold core (13), and the slider seat (4) is provided with a pin insert avoidance groove (405) for the rear mold insert pin (19) to pass through.
Citation Information
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