An injection molding mold
By working together with the slider and core components in the mold design, the mechanical interference problem between the core and the inner groove of the product is solved, achieving high-precision, interference-free demolding and avoiding product deformation and performance degradation of the splicing surface.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU DESAY PRECISION PARTS CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional injection molding molds cause mechanical interference between the core and the product's inner groove during demolding due to their encapsulation relationship, leading to product deformation or cracks. Furthermore, multi-segment injection molding processes result in the degradation of physical properties at the joint surfaces, making it difficult to meet product precision requirements.
By utilizing the synergistic effect of the first slider, second slider, core assembly, and limiting assembly in the mold design, and through the cooperation of the wedge surface and the limiting assembly, the core can be pulled out in stages, avoiding mechanical interference and meeting the product precision requirements.
It achieves interference-free demolding between the core and the product's inner groove, ensuring product precision and avoiding the mechanical interference and performance degradation issues of spliced surfaces during traditional demolding.
Smart Images
Figure CN224489868U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, and in particular to an injection molding mold. Background Technology
[0002] When products with inner grooves are injection molded, the hidden space constraints of the cavity design make demolding difficult. Specifically, when the mold is closed, the core needs to completely fill the inner groove space to form the cavity. However, during the mold opening stage, the enclosing relationship between the core and the inner groove of the product will cause mechanical interference. Furthermore, when the inner groove has a corner structure, traditional ejection mechanisms, such as ejector pins or push plates, will not be able to simultaneously detach from the inner groove area along the demolding direction, causing the product to be dragged and deformed by the core, and even defects such as cracks and scratches.
[0003] In existing technologies, the solution to this problem is to use a multi-stage injection molding process, disassembling the product into separate structures without internal grooves. These structures are then molded separately through two or more injection molding processes, and finally assembled into a finished product using methods such as snap-fit splicing, adhesive bonding, or ultrasonic welding. While this method can avoid demolding interference, it has significant limitations. The physical properties of the spliced surfaces are significantly degraded, and steps or gaps at the splicing points can directly lead to functional failure of the product, making it difficult to meet the product's precision requirements. Utility Model Content
[0004] To address the shortcomings of the prior art, this utility model provides an injection molding mold that avoids the mechanical interference caused by the encapsulation relationship between the core and the product's inner groove during traditional demolding, and can meet the product's precision requirements.
[0005] The technical effect to be achieved by this utility model is realized through the following technical solution:
[0006] This utility model provides an injection molding die, comprising:
[0007] template;
[0008] The first slider is slidably connected to the template;
[0009] The second slider is slidably connected to the first slider;
[0010] A core assembly includes a first core and a second core. The first core has a wedge-shaped structure and is connected to a first slider. The second core is connected to the second slider to limit the second slider in the horizontal direction, and the second core slides against the wedge-shaped surface of the first core, the wedge-shaped surface being inclined relative to the horizontal plane.
[0011] A limiting component is disposed on the template and located on the movement path of the first slider and the second slider, the limiting component having a locking state that restricts the second slider from sliding in the horizontal direction;
[0012] The first slider moves horizontally, sequentially passing through a first position, a second position, and a third position. When the first slider is in the first position, the limiting component is locked, and the first core holds the second core in a first vertical position. When the first slider slides from the first position to the second position, the limiting component is locked, the first core slides relative to the second core, and the second core moves to a second vertical position. When the first slider slides from the second position to the third position, the limiting component is unlocked, and the first slider and the second slider slide together, so that the first core and the second core slide together horizontally.
[0013] In some implementations, there is a movable gap between the first slider and the second slider, and the second core moves through the first slider and is connected to the second slider.
[0014] In this implementation, the movable gap allows the first slider and the second slider to slide relative to each other, and with the help of the limiting component, the core pulling can be achieved in stages.
[0015] In some implementations, the limiting component includes a locking structure and an unlocking structure. The unlocking structure is located downstream of the locking structure along the demolding path. When the first slider is in a first position or a second position, the second slider is limited by the locking structure. When the first slider is in a third position, the first slider presses against the unlocking structure to release the locking structure from its locked state.
[0016] In some implementations, the locking structure and the unlocking structure are elastically connected to the template, and the locking structure and the unlocking structure are connected together.
[0017] In this implementation, when the first slider presses down on the unlocking structure, the unlocking structure presses down, causing the locking structure to press down, thereby releasing the locked state, and thus enabling the first slider to drive the second slider to slide together.
[0018] In some implementations, the locking structure includes a locking block, and the second slider is provided with a latching block that engages with the locking block for locking.
[0019] In some implementations, the unlocking structure includes an unlocking block, and the first slider is provided with a pressure block that cooperates with the unlocking structure to unlock.
[0020] In some implementations, along the movement path of the first slider, the unlocking block has a first guide surface on each of its opposite sides, and the pressing block has a second guide surface that cooperates with the first guide surface.
[0021] In this implementation, both the first guide surface and the second guide surface are inclined surfaces. The first guide surface and the second guide surface cooperate to make the pressure block gradually fit against the unlocking block as the first slider moves.
[0022] In some implementations, the snap-fit block has a third guide surface that mates with the first guide surface.
[0023] In some implementations, the first core has a limiting groove, and the second core has a limiting member that cooperates with the limiting groove for limiting.
[0024] In some implementations, the injection molding die also includes a drive mechanism that is driven and connected to the first slider.
[0025] In summary, this utility model has at least the following advantages:
[0026] The injection molding die provided by this utility model has a first core connected to a first slider and a second core connected to a second slider, with the second core slidably fitting against the wedge-shaped surface of the first core. The second slider is slidably connected to the first slider, and a limiting component is located on the moving path of the first and second sliders. Through the coordinated action of the first slider, the second slider, the core component, and the limiting component, the second core can first move vertically along the wedge-shaped surface of the first core during the mold opening process, disengaging from the corner structure of the product's inner groove. Then, as the first slider slides horizontally, the first and second cores disengage from the product's inner groove, avoiding the mechanical interference caused by the enveloping relationship between the core and the product's inner groove during traditional demolding, and meeting the product's precision requirements. Attached Figure Description
[0027] Figure 1 These are schematic diagrams of the structure of injection molding dies in some embodiments;
[0028] Figure 2 for Figure 1 The image shows a magnified view of the injection mold at point A.
[0029] Figure 3 for Figure 1 A schematic cross-sectional view of the injection molding die shown;
[0030] Figure 4 for Figure 3 The image shown is a magnified view of the injection mold at point B.
[0031] Figure 5 These are schematic diagrams of the core assembly in some embodiments;
[0032] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the core assembly.
[0033] Marked in the image:
[0034] 100. Template;
[0035] 200, First slider; 201, Movement gap; 210, Pressure block; 211, Second guide surface;
[0036] 300. Second slider; 310. Snap-fit block; 311. Third guide surface;
[0037] 400, Core assembly; 410, First core; 411, Wedge-shaped surface; 412, Limiting groove; 420, Second core; 421, Limiting component;
[0038] 500, Limiting component; 510, Locking structure; 511, Locking block; 520, Unlocking structure; 521, Unlocking block; 5211, First guide surface;
[0039] 600. Drive mechanism;
[0040] 700. Products. Detailed Implementation
[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.
[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0043] Example 1:
[0044] Please see the appendix Figure 1 ~Appendix Figure 5 The injection molding mold of this utility model includes a template 100, a first slider 200, a second slider 300, a core assembly 400, and a limiting assembly 500.
[0045] In this regard, please combine Figure 1 , Figure 3 and Figure 5 , Figure 1 and Figure 3 The diagram illustrates the structural relationship between the template 100, the first slider 200, the second slider 300, the core assembly 400, and the limiting assembly 500 in this embodiment of the present invention. Figure 5 The diagram illustrates the specific structure of the wedge-shaped surface 411 in this embodiment of the present invention. Specifically, the first slider 200 is slidably connected to the template 100; the second slider 300 is slidably connected to the first slider 200; the core assembly 400 includes a first core 410 and a second core 420, the first core 410 having a wedge-shaped structure and being connected to the first slider 200, the second core 420 being connected to the second slider 300 to limit the second slider 300 in the horizontal direction, and the second core 420 slidably fitting against the wedge-shaped surface 411 of the first core 410, the wedge-shaped surface 411 being inclined relative to the horizontal plane; the limiting assembly 500 is disposed on the template 100 and located on the movement path of the first slider 200 and the second slider 300, the limiting assembly 500 having a locking state that restricts the second slider 300 from sliding in the horizontal direction.
[0046] The first slider 200 moves horizontally, passing through a first position, a second position, and a third position in sequence. When the first slider 200 is in the first position, the limiting component 500 is locked, and the first core 410 holds the second core 420 so that the second core 420 is in the first vertical position. When the first slider 200 slides from the first position to the second position, the limiting component 500 is locked, the first core 410 slides relative to the second core 420, and the second core 420 moves to the second vertical position. When the first slider 200 slides from the second position to the third position, the limiting component 500 is unlocked, and the first slider 200 and the second slider 300 slide together so that the first core 410 and the second core 420 slide together in the horizontal direction.
[0047] In this embodiment, the injection-molded product 700 is a product 700 with an inner groove, and the inner groove has corners. When the product 700 with the inner groove is injection molded, the first slider 200 is in the first position, and the first core 410 holds the second core 420 so that the second core 420 is in the first vertical position. At this time, the inner groove of the product 700 is engaged by the second core 420. When the mold is opened, the first slider 200 slides from the first position to the second position, and the second slider 300 is locked by the limiting component 500, thereby limiting the second core 420 in the horizontal direction, so that the first slider 200 and the second slider 300 slide relative to each other, thereby causing the second core 420 to slide along the wedge surface 411 of the first core 410. Since the wedge surface 411 is inclined relative to the horizontal plane, the second core 420 slides along the wedge surface 411 of the first core 410. When core 420 slides along the wedge-shaped surface 411 of the first core 410, the second core 420 will move vertically until it is in the second vertical position. At this time, the second core 420 disengages from the corner structure in the inner groove of the product 700, that is, it is released from the state of being locked in the corner structure in the inner groove of the product 700. When the first slider 200 continues to slide to the third position, the limiting component 500 is unlocked so that the second slider 300 slides with the first slider 200, thereby causing the first core 410 and the second core 420 to slide together in the horizontal direction, thereby causing the first core 410 and the second core 420 to disengage from the inner groove of the product 700, and further realizing the demolding of the product 700.
[0048] In the aforementioned injection molding mold, the first core 410 is connected to the first slider 200, the second core 420 is connected to the second slider 300, and the second core 420 slides against the wedge-shaped surface 411 of the first core 410. The second slider 300 is slidably connected to the first slider 200, and the limiting component 500 is located on the moving path of the first slider 200 and the second slider 300. Through the synergistic action of the first slider 200, the second slider 300, the core component 400, and the limiting component 500, the second core 420 can first move vertically along the wedge-shaped surface 411 of the first core 410 during the mold opening process, disengaging from the corner structure of the inner groove of the product 700. Then, as the first slider 200 slides horizontally, the first core 410 and the second core 420 disengage from the inner groove of the product 700, avoiding the mechanical interference caused by the enveloping relationship between the core and the inner groove of the product 700 during traditional demolding, and meeting the precision requirements of the product 700.
[0049] Example 2:
[0050] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the injection molding die of this utility model. Please refer to the appendix. Figure 2 ~Appendix Figure 5 .
[0051] Please see below. Figure 3 , Figure 3 The diagram illustrates the structural relationship between the first slider 200 and the second slider 300 in this embodiment of the present invention. Specifically, there is a movable gap 201 between the first slider 200 and the second slider 300, and the second core 420 is movably inserted through the first slider 200 and connected to the second slider 300.
[0052] In this embodiment, the movable gap 201 allows the first slider 200 and the second slider 300 to slide relative to each other. Combined with the limiting component 500, this enables staged core pulling. During mold opening, the first slider 200 moves first, while the second slider 300 remains stationary due to the limiting component 500. This allows the second core 420 to move vertically along the wedge-shaped surface 411 of the first core 410, thus disengaging from the corner structure of the inner groove of the product 700, achieving the first core pulling. When the first slider is in the third position, the limiting component 500 unlocks, and the first slider 200 drives the second slider 300 to slide together, causing the first core 410 and the second core 420 to slide together in the horizontal direction, completing the second core pulling and thus successfully demolding.
[0053] In some preferred embodiments, please refer to Figure 2 , Figure 2 The diagram illustrates the structural relationship between the locking structure 510 and the unlocking structure 520 in this embodiment of the present invention. Specifically, the limiting component 500 includes a locking structure 510 and an unlocking structure 520. The unlocking structure 520 is located downstream of the locking structure 510 along the demolding path. When the first slider 200 is in the first position or the second position, the second slider 300 is limited by the locking structure 510. When the first slider 200 is in the third position, the first slider 200 presses against the unlocking structure 520 to release the locking structure 510 from its locked state. When the first slider 200 is in the first position and the second position, the locking structure 510 stably restricts the horizontal sliding of the second slider 300, ensuring that the second core 420 is only driven by the wedge surface 411 of the first core 410 to move in the vertical direction, that is, the second core 420 moves from the first vertical position to the second vertical position, realizing the separation from the corner structure of the inner groove of the product 700 and avoiding mechanical interference in the early stage of demolding; while the unlocking structure 520 triggers the unlocking when the first slider 200 reaches the third position, so that the first slider 200 and the second slider 300 slide horizontally synchronously, ensuring that the core assembly 400 is completely separated from the inner groove of the product 700.
[0054] It is understandable that the locking and unlocking states of the limit component 500 are driven by the position of the first slider 200, that is, triggered sequentially along the demolding path. No additional power source is required for control. The entire process is automated through the linkage of mechanical structures, which improves the coordination and reliability of the demolding action.
[0055] In some preferred embodiments, the locking structure 510 and the unlocking structure 520 are elastically connected to the template 100, and the locking structure 510 and the unlocking structure 520 are connected to each other. When the first slider 200 presses against the unlocking structure 520, the unlocking structure 520 presses down, causing the locking structure 510 to press down, thereby releasing the locked state, and thus allowing the first slider 200 to drive the second slider 300 to slide together.
[0056] In some preferred embodiments, the locking structure 510 includes a locking block 511, and the second slider 300 is provided with a latching block 310 that engages with the locking block 511 for locking. The latching block 310 engages with the locking block 511 to restrict the second slider 300 from sliding in the horizontal direction, ensuring that the second slider 300 will not be unexpectedly displaced by external forces when the first slider 200 is in the first position and the second position, thus providing a stable foundation for the precise vertical movement of the second core 420.
[0057] In some preferred embodiments, the unlocking structure 520 includes an unlocking block 521, and the first slider 200 is provided with a pressure block 210 that cooperates with the unlocking structure 520 for unlocking. When the first slider moves to the third position, the pressure block 210 abuts against the unlocking module and applies pressure to the unlocking module, causing the unlocking module to drive the locking module down, thereby releasing the locking module from its locked state. In this way, the preset unlocking timing can be precisely matched to ensure that the second slider 300 is unlocked only after the second core 420 has completely disengaged from the inner groove corner structure, avoiding interference between the core and the product 700 due to unlocking too early, or excessive core-pulling resistance due to unlocking too late.
[0058] In some preferred embodiments, along the moving path of the first slider 200, the unlocking block 521 has a first guide surface 5211 on each of its opposite sides, and the pressing block 210 has a second guide surface 211 that cooperates with the first guide surface 5211. Both the first guide surface 5211 and the second guide surface 211 are inclined surfaces. The cooperation of the first guide surface 5211 and the second guide surface 211 allows the pressing block 210 to gradually conform to the unlocking block 521 as the first slider 200 moves. The inclination angle of the second guide surface 211 can smoothly convert the horizontal driving force of the pressing block 210 into the unlocking force required by the unlocking block 521, ensuring that the unlocking action is smooth and without jamming from triggering to completion, thereby ensuring the reliability of the locking structure 510 in unlocking.
[0059] In some more preferred embodiments, the snap-fit block 310 has a third guide surface 311 that mates with the first guide surface 5211. The third guide surface 311 is an inclined surface. When the mold is closed, the third guide surface 311 mates with the first guide surface 5211, thereby facilitating the snap-fit block 310 to press against the unlocking block 521, which in turn drives the locking block 511 to press down, further ensuring that the first slider 200 and the second slider 300 can slide smoothly along the mold closing path.
[0060] Example 3:
[0061] The difference between this embodiment and Embodiment 2 is that this embodiment further optimizes the structure of the injection molding mold of this utility model. Please refer to the appendix. Figure 6 .
[0062] The first core 410 has a limiting groove 412, and the second core 420 has a limiting member 421 that cooperates with the limiting groove 412 for limiting.
[0063] In this embodiment, when the first core 410 and the second core 420 slide relative to each other, the limiting member 421 slides along the limiting groove 412, which avoids the problem of the first core 410 completely detaching from the second core 420 and causing functional failure.
[0064] In some preferred embodiments, the injection molding die further includes a drive mechanism 600, which is driven and connected to the first slider 200. The drive mechanism 600 drives the first slider to slide, thereby causing the second slider 300 to slide, so that the first core 410 and the second core 420 slide, thereby realizing mold closing or mold opening.
[0065] In this injection molding die, a first core 410 is connected to a first slider 200, a second core 420 is connected to a second slider 300, and the second core 420 slides against the wedge-shaped surface 411 of the first core 410. The second slider 300 is slidably connected to the first slider 200, and a limiting component 500 is located on the moving path of the first slider 200 and the second slider 300. Through the synergistic action of the first slider 200, the second slider 300, the core component 400, and the limiting component 500, the second core 420 can first move vertically along the wedge-shaped surface 411 of the first core 410 during the mold opening process, disengaging from the corner structure of the inner groove of the product 700. Then, as the first slider 200 slides horizontally, the first core 410 and the second core 420 disengage from the inner groove of the product 700. This avoids the mechanical interference caused by the enveloping relationship between the core and the inner groove of the product 700 during traditional demolding, and can meet the precision requirements of the product 700.
[0066] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0067] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0068] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0069] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0070] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. An injection molding die, characterized in that, include: Template (100); The first slider (200) is slidably connected to the template (100); The second slider (300) is slidably connected to the first slider (200); The core assembly (400) includes a first core (410) and a second core (420). The first core (410) has a wedge-shaped structure and is connected to the first slider (200). The second core (420) is connected to the second slider (300) to limit the second slider (300) in the horizontal direction. The second core (420) slides against the wedge-shaped surface (411) of the first core (410), and the wedge-shaped surface (411) is inclined relative to the horizontal plane. A limiting component (500) is disposed on the template (100) and located on the movement path of the first slider (200) and the second slider (300). The limiting component (500) has a locking state that restricts the second slider (300) from sliding in the horizontal direction. The first slider (200) moves horizontally through a first position, a second position, and a third position. When the first slider (200) is in the first position, the limiting component (500) is locked, and the first core (410) holds the second core (420) so that the second core (420) is in a first vertical position. When the first slider (200) slides from the first position to the second position, the limiting component (500) is locked, and the first core (410) slides relative to the second core (420), causing the second core (420) to move to a second vertical position. When the first slider (200) slides from the second position to the third position, the limiting component (500) is unlocked, and the first slider (200) and the second slider (300) slide together so that the first core (410) and the second core (420) slide together in the horizontal direction.
2. The injection molding die according to claim 1, characterized in that, There is a movable gap (201) between the first slider (200) and the second slider (300), and the second core (420) is movably passed through the first slider (200) and connected to the second slider (300).
3. The injection molding die according to claim 1, characterized in that, The limiting component (500) includes a locking structure (510) and an unlocking structure (520). The unlocking structure (520) is located downstream of the locking structure (510) along the demolding path. When the first slider (200) is in the first position or the second position, the second slider (300) is limited by the locking structure (510). When the first slider (200) is in the third position, the first slider (200) presses against the unlocking structure (520) to release the locking structure (510).
4. The injection molding die according to claim 3, characterized in that, The locking structure (510) and the unlocking structure (520) are elastically connected to the template (100), and the locking structure (510) and the unlocking structure (520) are connected to each other.
5. The injection molding die according to claim 4, characterized in that, The locking structure (510) includes a locking block (511), and the second slider (300) is provided with a snap-fit block (310) that engages with the locking block (511) for locking.
6. The injection molding die according to claim 5, characterized in that, The unlocking structure (520) includes an unlocking block (521), and the first slider (200) is provided with a pressure block (210) that cooperates with the unlocking structure (520) to unlock.
7. The injection molding die according to claim 6, characterized in that, Along the moving path of the first slider (200), the unlocking block (521) has a first guide surface (5211) on each of its opposite sides, and the pressing block (210) has a second guide surface (211) that cooperates with the first guide surface (5211).
8. The injection molding die according to claim 7, characterized in that, The snap-fit block (310) has a third guide surface (311) that mates with the first guide surface (5211).
9. The injection molding die according to claim 1, characterized in that, The first core (410) has a limiting groove (412), and the second core (420) has a limiting member (421) that cooperates with the limiting groove (412) to limit the movement.
10. The injection molding die according to claim 1, characterized in that, It also includes a drive mechanism (600) that is driven and connected to the first slider (200).