Injection mold with composite core-pulling structure
By using an injection mold with a composite core-pulling structure, the problem of difficult demolding of the inclined wire groove of the wire clamp was solved, achieving complete demolding of the wire clamp and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-14
AI Technical Summary
Existing injection molds are difficult to demold when molding wire clamps with inclined grooves, which can easily lead to deformation or damage of the wire clamps and fail to meet production requirements.
The injection mold with a composite core-pulling structure includes a moving mold assembly, a fixed mold assembly, an ejection mechanism, and a composite core-pulling structure. Through the synergistic action of the slider and the core-pulling block, the inclined groove of the wire clamp is completely demolded, avoiding the risk of tearing caused by traditional straight ejection.
It enables complete demolding of the inclined wire groove of the wire clamp, simplifies the mold structure, avoids downtime risks, and improves production efficiency and molding accuracy.
Smart Images
Figure CN224116642U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of injection molding dies, and in particular to an injection mold with a composite core-pulling structure. Background Technology
[0002] In the field of plastic injection molding, cable clamps are key components for cable fixing and management, and their structural design directly affects the reliability and production efficiency of wire harness assembly. Especially for cable clamps with inclined groove structures, the inclined grooves form a progressive clamping structure, generating a self-locking effect when the cable is pulled, and the inclined opening forms a trumpet-shaped guide structure, reducing assembly difficulty. However, cable clamps with inclined groove structures face the problem of inability to demold during injection molding. Traditional injection molds typically use vertical parting surfaces and parallel core-pulling structures, which can easily lead to deformation or damage of the cable clamps, failing to meet the molding and demolding requirements of the inclined grooves. Utility Model Content
[0003] The purpose of this application is to overcome the shortcomings of the prior art and provide an injection mold with a composite core-pulling structure that can meet the requirements of inclined groove forming and demolding.
[0004] The objective of this application is achieved through the following technical solution:
[0005] An injection mold with a composite core-pulling structure, comprising:
[0006] A moving mold assembly, comprising a moving mold blank, a moving mold core, and a lower pad, wherein the moving mold blank has a through hole and a guide hole that communicates with the through hole, and the lower pad has a mounting groove that communicates with the through hole;
[0007] A fixed mold assembly, the fixed mold assembly including a fixed mold blank and a fixed mold core, the fixed mold blank being provided with a limiting groove, the limiting groove being correspondingly provided with the guide hole;
[0008] An ejection mechanism, comprising an ejector rod, an ejector pin, and a spring, wherein the ejector rod is connected to the lower pad, the spring is sleeved on the ejector rod, and the ejector pin passes through the moving mold assembly;
[0009] A composite core-pulling structure includes a slider and a core-pulling block. One end of the slider away from the core-pulling block is located in the mounting groove. The slider moves vertically within the through hole. The other end of the slider is provided with a guide surface. The core-pulling block is disposed above the slider and slides along the guide surface. The core-pulling block moves within the guide hole. One end of the core-pulling block away from the slider abuts against the limiting groove. The core-pulling block, the ejector pin, the fixed mold core, and the moving mold core together form a cavity.
[0010] In one embodiment, the injection mold with the composite core-pulling structure is provided with a plurality of limiting grooves, a plurality of guide holes and a plurality of through holes. The plurality of limiting grooves are evenly distributed on the fixed mold blank, and the plurality of guide holes and the plurality of limiting grooves are provided in a one-to-one correspondence, and the plurality of through holes and the plurality of guide holes are provided in a one-to-one correspondence.
[0011] In one embodiment, a guide bar is provided at one end of the slider near the core-pulling block, and a corresponding groove is provided at one end of the core-pulling block near the slider, with the guide bar located within the groove.
[0012] In one embodiment, the core-pulling block is provided with a limiting flange, which is located on the side of the core-pulling block away from the cavity. When the mold is closed, the limiting flange abuts against the bottom of the moving mold blank.
[0013] In one embodiment, the core-pulling block is a right-angled trapezoid, the side of the groove near the cavity is parallel to the mold opening direction, and the inclined surface of the core-pulling block is set parallel to the mold opening direction.
[0014] In one embodiment, the composite core-pulling structure further includes an insert, the insert, the core-pulling block, the fixed mold core, and the moving mold core together form a cavity.
[0015] In one embodiment, the insert includes a first insert and a second insert, the first insert being used to form an inclined groove, the first insert being embedded in the core-pulling block, and the second insert being disposed on the outside of the core-pulling block.
[0016] In one embodiment, the moving mold core has a slot, the second insert is disposed in the slot, the bottom of the slot has a fixing groove, the bottom of the second insert has a fixing boss, and the fixing boss is located in the fixing groove.
[0017] Compared with the prior art, this application has at least the following advantages:
[0018] In injection molds with a composite core-pulling structure, during mold closing, the lower backing plate fits against the moving mold blank, allowing the core-pulling block, fixed mold core, and moving mold core to collectively form the cavity. During mold opening, the fixed mold assembly disengages from the wire clamp, and the ejector mechanism drives the ejector pin and slide to rise synchronously. The ejector pin pushes out the fixing part of the wire clamp, causing it to disengage from the cavity; the slide rises simultaneously, causing the core-pulling block to move forward and disengage from the inclined wire groove of the wire clamp, thus achieving demolding of the wire clamp. The ejector mechanism retracts and resets, starting the next work cycle.
[0019] Injection molds with a composite core-pulling structure achieve ejection and core pulling through the combined action of the ejection mechanism and the composite core-pulling structure, enabling complete demolding of the inclined wire groove of the wire clamp and avoiding the risk of tearing caused by traditional straight ejection.
[0020] There is no need to set up inclined guide pillars and side core pulling mechanisms, which simplifies the overall structure of injection molds, facilitates maintenance, avoids downtime caused by collisions during mold closing, and improves production efficiency. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of an injection mold with a composite core-pulling structure according to an embodiment;
[0023] Figure 2 for Figure 1 The image shows a cross-sectional view of an injection mold with a composite core-pulling structure.
[0024] Figure 3 for Figure 1 A schematic diagram of the slider of an injection mold with a composite core-pulling structure is shown.
[0025] Figure 4 for Figure 1 The diagram shows the structure of the core-pulling block of an injection mold with a composite core-pulling structure.
[0026] Figure 5 for Figure 1 The diagram shows a composite core-pulling structure of an injection mold. Detailed Implementation
[0027] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.
[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0030] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments:
[0031] Please see Figures 1 to 5 This is an embodiment of the present invention, an injection mold 10 with a composite core-pulling structure, comprising a moving mold assembly 100, a fixed mold assembly 200, an ejection mechanism 300, and a composite core-pulling structure 400. The moving mold assembly 100 includes a moving mold blank 110, a moving mold core 120, and a lower backing plate 130. The moving mold blank 110 has a through hole 1101, and the moving mold core 120 has a guide hole (not shown) communicating with the through hole 1101. The lower backing plate 130 has a mounting groove (not shown) communicating with the through hole 1101. The fixed mold assembly 200 includes a fixed mold blank 210 and a fixed mold core 220. The fixed mold core 220 has a limiting groove (not shown), which corresponds to the guide hole. The ejection mechanism 300 includes an ejector rod (not shown) and an ejector pin 310. The ejector rod and ejector pin 310 are connected to the lower pad 130, and the ejector pin 310 passes through the moving mold assembly 100. The composite core-pulling structure 400 includes a slider 410 and a core-pulling block 420. The end of the slider 410 away from the core-pulling block 420 is located in the mounting groove. The slider 410 moves vertically in the through hole 1101. The other end of the slider 410 is provided with a guide surface 411. The core-pulling block 420 is located above the slider 410. The core-pulling block 420 slides along the guide surface 411 and moves in the guide hole. The end of the core-pulling block 420 away from the slider 410 abuts against the limiting groove. The core-pulling block 420, the fixed mold core 220, and the moving mold core 120 together form a cavity (not shown).
[0032] It should be noted that, in this embodiment, the end of the slider 410 away from the core-pulling block 420 is fixedly connected to the lower pad 130 by screws.
[0033] Specifically, during mold closing, the ejector mechanism 300 is in the contracted position. At this time, the lower backing plate 130 is in contact with the moving mold blank 110, so that the core-pulling block 420, the fixed mold core 220, and the moving mold core 120 together form the cavity. During mold opening, the fixed mold assembly 200 disengages from the wire clamp, and the ejector mechanism 300 drives the ejector pin 310 and the core-pulling block 420 upward, causing the wire clamp to disengage from the moving mold core 120. Among them, the core-pulling block 420 slides forward along the guide surface 411 to achieve side ejection, and the core-pulling block 420 disengages from the inclined wire groove of the wire clamp, and the ejector mechanism 300 retracts to achieve reset.
[0034] In this embodiment, the injection mold 10 with the composite core-pulling structure 400 achieves ejection and lateral core pulling through the synergistic action of the ejection mechanism 300 and the composite core-pulling structure 400. The demolding angle matches the inclined groove, ensuring complete demolding of the inclined groove and avoiding the risk of tearing caused by traditional straight ejection. Simultaneously, it eliminates the need for inclined guide pillars and lateral core-pulling mechanisms, simplifying the overall structure of the injection mold, facilitating maintenance, preventing downtime due to collisions during mold closing, and improving production efficiency.
[0035] like Figure 2 As shown, in one embodiment, the injection mold 10 with a composite core-pulling structure 400 is provided with multiple limiting grooves, guide holes, and multiple through holes 1101. The multiple limiting grooves are evenly distributed on the fixed mold blank 210, and the multiple guide holes and multiple limiting grooves are arranged one-to-one, as are the multiple through holes 1101 and multiple guide holes. It can be understood that the injection mold 10 with the composite core-pulling structure has multiple evenly distributed cavities, and simultaneously forms multiple wire clips, improving production efficiency. The injection mold 10 with the composite core-pulling structure achieves demolding through the ejection mechanism 300 without the need for a lateral demolding driving force, increasing the flexibility of the mold's station setup. Specifically, in this embodiment, the injection mold 10 with the composite core-pulling structure has a total of eight cavities, each cavity corresponding to one composite core-pulling structure 400. Through the simultaneous ejection of the lower pad 130, multiple wire clips are simultaneously demolded, ensuring the consistency of wire clips in each cavity, improving overall production efficiency, reducing operational complexity, and optimizing the production process.
[0036] like Figures 2 to 5 As shown, in one embodiment, a guide strip 412 is provided at one end of the slider 410 near the core-pulling block 420, and a corresponding groove 421 is provided at the end of the core-pulling block 420 near the slider 410, with the guide strip 412 located within the groove 421. Specifically, in this embodiment, the guide strip 412 is a T-shaped strip, and the groove 421 is a matching T-shaped groove. Through the cooperation of the T-shaped strip and the T-shaped groove, relative sliding is achieved, while ensuring that the slider 410 and the core-pulling block 420 remain stable during movement. During mold opening, the ejection mechanism 300 drives the slider 410 to move upward, and the core-pulling block 420 moves forward along the T-shaped groove, achieving demolding.
[0037] Specifically, in this embodiment, there is one T-shaped strip located in the middle of the guide surface 411, and a corresponding T-shaped groove is provided in the middle of the bottom of the core-pulling block 420.
[0038] like Figures 2 to 5 As shown, in one embodiment, the core-pulling block 420 has a right-angled trapezoidal structure. The included angle of the inclined surface of the core-pulling block 420 is adapted to the slide groove 421. The side of the slide groove 421 near the cavity is parallel to the mold opening direction, and the inclined surface of the core-pulling block 420 is set parallel to the mold opening direction. It can be understood that the right-angled trapezoidal structure with the inclined side as a parallel surface can simplify processing and assembly. The parallelism of the inclined side with the mold opening direction reduces the difficulty of processing the inclined surface and facilitates angle verification during assembly.
[0039] like Figures 2 to 4 As shown, in one embodiment, the core-pulling block 420 is provided with a limiting flange 422. The limiting flange 422 is located on the side of the core-pulling block 420 away from the cavity. When the mold is closed, the limiting flange 422 abuts against the bottom of the moving mold blank 110. It can be understood that when the mold is closed, the limiting flange 422 and the limiting groove together limit the position of the core-pulling block 420 to ensure the forming accuracy of the wire clamp.
[0040] like Figures 2 to 5 As shown, in one embodiment, the composite core-pulling structure 400 further includes an insert 430. The insert 430, core-pulling block 420, fixed mold core 220, and moving mold core 120 together form a cavity. It is understood that the insert 430, core-pulling block 420, fixed mold core 220, and moving mold core 120 together constitute the cavity, enabling the mold to adapt to more complex wire clip structures and improving molding accuracy. Furthermore, through the combination of different components, the molding of different parts of the wire clip can be optimized, reducing overall processing errors.
[0041] like Figures 2 to 5 As shown, in one embodiment, the insert further includes a first insert 431 and a second insert 432. The first insert 431 is used to form an inclined groove and is embedded within the core-pulling block 420. The second insert 432 is disposed on the outside of the core-pulling block 420 and is used to form the back plate of the wire clamp. Specifically, the first insert 431 is adapted to the shape and inclination angle of the inclined groove of the wire clamp to ensure the dimensional stability of the inclined feature and avoid the deformation or insufficient filling problems that may occur with traditional integral core-pulling. The second insert 432 is independently disposed on the outside of the core-pulling block 420 to avoid interference with the forming of the inclined groove and to ensure the flatness and dimensional accuracy of the back plate surface.
[0042] Furthermore, the insert fits tightly with the core-pulling block 420 and the mold core, reducing the probability of molten plastic seeping into the gaps and improving the surface quality of the wire clamp.
[0043] like Figures 2 to 5As shown, in one embodiment, the moving mold core 120 has a slot (not shown), the second insert is disposed in the slot, the bottom of the slot has a fixing groove (not shown), and the bottom of the second insert has a fixing boss 4322, which is located in the fixing groove. It can be understood that the fitting design of the fixing boss 4322 and the fixing groove forms a mechanical interlock, effectively preventing the second insert from displacing or loosening due to vibration or pressure during injection molding, thus improving the stability of mold operation.
[0044] Compared with the prior art, this application has at least the following advantages:
[0045] In injection molds with a composite core-pulling structure, during mold closing, the lower backing plate fits against the moving mold blank, allowing the core-pulling block, fixed mold core, and moving mold core to collectively form the cavity. During mold opening, the fixed mold assembly disengages from the wire clamp, and the ejector mechanism drives the ejector pin and slide to rise synchronously. The ejector pin pushes out the fixing part of the wire clamp, causing it to disengage from the cavity; the slide rises simultaneously, causing the core-pulling block to move forward and disengage from the inclined wire groove of the wire clamp, thus achieving demolding of the wire clamp. The ejector mechanism retracts and resets, starting the next work cycle.
[0046] Injection molds with a composite core-pulling structure achieve ejection and core pulling through the combined action of the ejection mechanism and the composite core-pulling structure, enabling complete demolding of the inclined wire groove of the wire clamp and avoiding the risk of tearing caused by traditional straight ejection.
[0047] There is no need to set up inclined guide pillars and side core pulling mechanisms, which simplifies the overall structure of injection molds, facilitates maintenance, avoids downtime caused by collisions during mold closing, and improves production efficiency.
[0048] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. An injection mold with a composite core-pulling structure, characterized in that, include: A moving mold assembly, comprising a moving mold blank, a moving mold core, and a lower pad, wherein the moving mold blank has a through hole and a guide hole that communicates with the through hole, and the lower pad has a mounting groove that communicates with the through hole; A fixed mold assembly, the fixed mold assembly including a fixed mold blank and a fixed mold core, the fixed mold core being provided with a limiting groove, the limiting groove being correspondingly provided with the guide hole; An ejection mechanism, comprising an ejector rod and an ejector pin, wherein the ejector rod is connected to the lower pad plate and the ejector pin passes through the moving mold assembly; A composite core-pulling structure includes a slider and a core-pulling block. One end of the slider away from the core-pulling block is located in the mounting groove. The slider moves vertically within the through hole. The other end of the slider is provided with a guide surface. The core-pulling block is disposed above the slider and slides along the guide surface. The core-pulling block moves within the guide hole. One end of the core-pulling block away from the slider abuts against the limiting groove. The core-pulling block, the ejector pin, the fixed mold core, and the moving mold core together form a cavity.
2. The injection mold with a composite core-pulling structure according to claim 1, characterized in that, The injection mold with the composite core-pulling structure is provided with multiple limiting grooves, guide holes and multiple through holes. The multiple limiting grooves are evenly distributed on the fixed mold blank. The multiple guide holes and multiple limiting grooves are arranged one-to-one, and the multiple through holes and multiple guide holes are arranged one-to-one.
3. The injection mold with a composite core-pulling structure according to claim 1, characterized in that, A guide bar is provided at one end of the slider near the core-pulling block, and a corresponding groove is provided at one end of the core-pulling block near the slider, with the guide bar located within the groove.
4. The injection mold with a composite core-pulling structure according to claim 1, characterized in that, The core-pulling block is provided with a limiting flange, which is located on the side of the core-pulling block away from the cavity. When the mold is closed, the limiting flange abuts against the bottom of the moving mold blank.
5. The injection mold with a composite core-pulling structure according to claim 3, characterized in that, The core-pulling block is a right-angled trapezoid, the side of the slide groove near the cavity is parallel to the mold opening direction, and the inclined surface of the core-pulling block is set parallel to the mold opening direction.
6. The injection mold with a composite core-pulling structure according to claim 1, characterized in that, The composite core-pulling structure also includes an insert, and the insert, the core-pulling block, the fixed mold core, and the moving mold core together form a cavity.
7. The injection mold with a composite core-pulling structure according to claim 6, characterized in that, The insert includes a first insert and a second insert. The first insert is used to form an inclined groove and is embedded in the core-pulling block. The second insert is disposed on the outside of the core-pulling block.
8. The injection mold with a composite core-pulling structure according to claim 7, characterized in that, The moving mold core has a slot, the second insert is disposed in the slot, the bottom of the slot has a fixing groove, the bottom of the second insert has a fixing boss, and the fixing boss is located in the fixing groove.