An injection molding structure combining sliding and inclined top components.
By combining the injection molding structure with the sliding and inclined ejector pins, and utilizing the cooperation between the inclined ejector pins and the guide inclined holes, the mold design is simplified, the demolding problem of the undercut on the side of the complex plastic parts is solved, and efficient and reliable demolding and molding effects are achieved, reducing manufacturing costs and extending the service life of the mold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN ZEALWIN ELECTRONICS
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-26
AI Technical Summary
When dealing with the undercut areas on the sides of complex plastic parts, the traditional sliding mechanism design of existing injection molds is complicated, resulting in cumbersome mold structure, high cost and short service life.
The injection molding structure adopts a combination of sliding and inclined ejector. The longitudinal movement of the inclined ejector is achieved through the cooperation of the inclined ejector rod and the guide inclined hole, which simplifies the sliding mechanism. The lateral movement of the sliding insert drives the inclined ejector rod to demold. Combined with the limiting component and locking mechanism, the mold closing and opening process is optimized.
The mold structure was simplified, manufacturing costs were reduced, demolding reliability and mold lifespan were improved, and smooth demolding and molding accuracy of the undercut side of the plastic part were ensured.
Smart Images
Figure CN224276032U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of injection molds, and in particular to an injection structure that combines a sliding element and an inclined ejector. Background Technology
[0002] In modern mass production of plastic products, injection molding technology is widely used due to its high efficiency and economy. However, many plastic products are designed with structures such as lateral recesses, protrusions, or holes, which can create "undercuts" or "side core pulls" when the mold closes. The presence of these structures makes simple straight-line mold opening methods insufficient for separating the product from the mold, necessitating the use of special demolding mechanisms to address the demolding problem of undercut structures.
[0003] In existing technologies, the commonly used mechanisms for handling lateral undercut structures in injection molded products mainly include sliding mechanisms. However, when the undercut structure on the side of the plastic part is complex, such as having multiple undercut positions or irregular undercut shapes, traditional sliding mechanisms require the design of more complex sliding inserts or the use of multi-level sliding structures. Designing complex sliding structures requires more precise fits and more parts, making the mold design process more cumbersome and demanding higher technical skills from designers. Complex sliding mechanisms have more parts and moving pairs, increasing the possibility of wear and reducing the service life of the mold.
[0004] Therefore, how to design an injection molding structure that can effectively handle the undercut on the side of the plastic part, while simplifying the mold structure, reducing manufacturing costs, and improving demolding reliability is an important issue currently facing the field of injection mold design. Utility Model Content
[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0006] This utility model provides an injection molding structure combining a sliding member and a slanted ejector, including a front mold assembly, a rear mold assembly, a sliding member mechanism, and a slanted ejector mechanism. The front mold assembly has a front mold core, the rear mold assembly has a rear mold core, and the sliding member mechanism has a sliding member insert. The front mold core, the rear mold core, and the sliding member insert cooperate with each other to form an injection molding cavity. The sliding member insert is disposed on the side of the injection molding cavity for injection molding the side wall of the plastic part. The slanted ejector mechanism has a slanted ejector rod, and the sliding member insert has a guide slanted hole. The slanted ejector rod passes through the guide slanted hole, thereby cooperating with the sliding member insert to injection mold the undercut position on the side of the plastic part.
[0007] Furthermore, the sliding mechanism also includes a sliding seat, a sliding pressure block, and an inclined guide post. The sliding pressure block is fixed to the front mold assembly, the inclined guide post is fixed to the sliding pressure block, the sliding insert is fixed to the sliding seat, the sliding seat is slidably connected to the rear mold assembly, and the sliding seat is provided with an inclined guide hole, so that the inclined guide post passes through the inclined guide hole, thereby driving the sliding seat and the sliding insert to move laterally.
[0008] Furthermore, the inclined ejector mechanism is also provided with an auxiliary rod, and a first through hole is provided in the slide seat. The auxiliary rod passes through the first through hole, and one end of the auxiliary rod is fastened to the inclined ejector rod, while the other end extends out of the slide seat and is provided with a first inclined surface. The end of the slide pressure block away from the injection cavity is provided with a first abutment parallel to the mold closing direction. The first abutment abuts against the end of the inclined ejector rod with the first inclined surface, thereby driving the inclined ejector rod to move towards the injection cavity to complete the mold closing operation.
[0009] Furthermore, the sliding mechanism is also provided with a first long strip, which is fixed to the sliding insert. The inclined push rod is provided with a first notch that extends laterally for a certain length corresponding to the position of the first long strip, so that the first long strip falls into the first notch and slides within the first notch. The sliding insert drives the first long strip to move laterally, so that the first long strip abuts against the side wall of the first notch away from the injection cavity, thereby driving the inclined push rod to move laterally.
[0010] Furthermore, it also includes a limiting component, which is fixed to the rear mold component to limit the movement of the slide seat.
[0011] Furthermore: the limiting assembly is equipped with a limiting bolt, and the bottom of the sliding seat is provided with a limiting notch corresponding to the position of the limiting bolt. The screw head of the limiting bolt is located in the limiting notch. The sliding seat moves laterally a certain distance away from the injection cavity, so that the side wall of the limiting notch close to the injection cavity abuts against the screw head of the limiting bolt, thus forming a limiting operation.
[0012] Furthermore, the limiting component is also equipped with a limiting clamp, and the bottom of the travel seat is equipped with a limiting post. When the travel seat moves a certain distance to the side, the limiting post moves synchronously and enters the clamping range of the limiting clamp, thereby being clamped by the limiting clamp to form a limiting operation.
[0013] Furthermore, it also includes a pressure strip, which is fixed to the rear mold assembly and limits the slide seat in the mold opening direction, so that the slide seat can move laterally along the long side of the pressure strip.
[0014] Furthermore, the slide block is also equipped with a slide shovel base, which is used to lock the slide seat when the mold is closed.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. Simplified mold structure and reduced manufacturing costs: This invention utilizes the lateral movement of the slide insert, which, through a guide hole, drives the ejector pin to move longitudinally perpendicular to the lateral movement, thus enabling the ejector pin to be demolded from the undercut position on the side of the plastic part. This design avoids setting complex undercut slides on the slide mechanism, thereby simplifying the complexity of the slide mechanism and the overall mold structure, effectively reducing the mold manufacturing cost.
[0017] 2. Achieve efficient and reliable demolding of the side undercut: By cleverly utilizing the cooperation between the slide insert and the angled ejector pin, as well as the drive of the guide angled hole, the angled ejector pin moves longitudinally during demolding, allowing the angled ejector pin to smoothly detach from the side undercut of the plastic part, ensuring a reliable demolding effect.
[0018] 3. Optimized mold closing and opening drive mechanism: During mold closing, the first stop block on the slide block abuts against the first inclined surface of the auxiliary rod, driving the auxiliary rod and the inclined ejector rod to move towards the injection cavity. This ensures that the inclined top of the ejector rod is accurately positioned and cooperates with the slide insert to form a mold structure with a side undercut. This drive method, which uses the auxiliary rod and inclined surface, makes the mold closing and return of the inclined ejector rod smoother and more reliable.
[0019] During mold opening, the slide insert drives the first strip fixed to it to move laterally. When the first strip abuts against the sidewall of the ejector pin away from the injection cavity, it drives the ejector pin to move laterally, thus completing the mold opening and demolding operation of the ejector pin. This design utilizes the mold opening motion of the slide mechanism itself to drive the ejector pin, simplifying the mold opening mechanism.
[0020] 4. Optimized limiting and locking functions: The combination of limiting bolts and limiting clamps in the limiting assembly ensures the accuracy of limiting the slide seat, while the elastic buffer of the limiting clamp reduces the impact caused by hard contact, thus extending the service life of the mold; the locking effect of the slide base on the slide seat during mold closing effectively prevents the slide seat from retreating due to injection pressure or vibration, ensuring the molding accuracy of the product and improving the overall performance of the mold.
[0021] With the above improvements, this utility model provides an injection molding structure combining a sliding block and an inclined ejector. By setting an inclined ejector rod within the sliding block insert, the end of the inclined ejector rod is used to form the undercut portion on the side of the plastic part. This effectively handles the undercut portion on the side of the plastic part, while simplifying the mold structure, reducing manufacturing costs, and improving demolding reliability.
[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a cross-sectional schematic diagram of the sliding seat and sliding pressure block of this utility model;
[0025] Figure 2 This is a cross-sectional schematic diagram of the inclined ejector rod and the first long strip in the mold-closing state of this utility model;
[0026] Figure 3 This is a cross-sectional schematic diagram of the inclined ejector rod and the first long strip of this utility model in the mold opening state;
[0027] Figure 4 This is a cross-sectional schematic diagram of the auxiliary rod and the inclined top rod of this utility model;
[0028] Figure 5 This is a cross-sectional schematic diagram of the row insert and row seat of this utility model;
[0029] Figure 6 This is a schematic diagram of the structure of the first notch and the first strip of this utility model;
[0030] Figure 7 This is a schematic diagram of the rear mold core and sliding mechanism of this utility model;
[0031] Figure 8 This is a schematic diagram of the limiting component and pressure strip of this utility model;
[0032] Figure 9 This is a schematic diagram of the structure of the sliding shovel base and the first abutment block of this utility model.
[0033] The reference numerals and names in the figure are as follows:
[0034] 10 Rear mold core; 11 Pressure strip; 12 Angled guide post; 20 Slide mechanism; 21 Slide insert; 22 Guide slanted hole; 23 First long strip; 30 Slide seat; 31 Angled guide hole; 32 First through hole; 33 Limiting notch; 34 Limiting post; 40 Slide pressure block; 41 Slide shovel base; 42 First abutment block; 43 Auxiliary inclined surface; 50 Angled ejector mechanism; 51 Angled ejector rod; 52 Angled ejector position; 53 First notch; 54 Auxiliary rod; 55 First inclined surface; 60 Limiting assembly; 61 Limiting bolt; 62 Limiting clamp. Detailed Implementation
[0035] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0036] Please see Figures 1 to 9 In this embodiment of the present invention, an injection molding structure combining a sliding part and a slanted ejector includes a front mold assembly, a rear mold assembly, a sliding part mechanism 20, and a slanted ejector mechanism 50. The front mold assembly is provided with a front mold core, the rear mold assembly is provided with a rear mold core 10, and the sliding part mechanism 20 is provided with a sliding part insert 21. The front mold core, the rear mold core 10, and the sliding part insert 21 cooperate with each other to form an injection molding cavity. The sliding part insert 21 is disposed on the side of the injection molding cavity for injection molding the side wall of the plastic part. The slanted ejector mechanism 50 is provided with a slanted ejector rod 51, and the sliding part insert 21 is provided with a guide slanted hole 22. The slanted ejector rod 51 passes through the guide slanted hole 22, thereby cooperating with the sliding part insert 21 to injection mold the undercut position on the side of the plastic part.
[0037] Specifically, in the injection molding process of plastic parts, a sliding mechanism 20 is typically used for side core pulling or parting, solving the demolding problem of undercut structures through lateral movement. Its core function is to extract the side core during mold opening, ensuring smooth demolding of the plastic part. However, when the side of the plastic part has undercuts, setting corresponding undercut slides on the sliding mechanism 20 results in a relatively complex structure, increasing the overall mold manufacturing cost.
[0038] This invention provides a slanted ejector rod 51 within the slide insert 21. The end of the slanted ejector rod 51 forms the undercut position on the side of the plastic part. The lateral movement of the slide insert 21 during demolding drives the slanted ejector rod 51, which is driven by the guide slanted hole 22, to move longitudinally perpendicular to the lateral movement. This allows the slanted top position 52 of the slanted ejector rod 51 to be demolded from the undercut position on the side of the plastic part. Therefore, this invention simplifies the complexity of the slide mechanism 20, simplifies the mold structure, and reduces the manufacturing cost of the mold.
[0039] Secondly, the specific demolding process of the inclined ejector rod 51 is as follows: When the slide insert 21 moves laterally during demolding, the guide inclined hole 22 moves accordingly. Since the inclined ejector rod 51 passes through the guide inclined hole 22, the lateral movement of the guide inclined hole 22 will generate a component force perpendicular to the lateral movement direction on the inclined ejector rod 51 through its inner wall, thereby driving the inclined ejector rod 51 to move longitudinally, so that the inclined top position 52 of the inclined ejector rod 51 gradually comes out from the undercut position on the side of the plastic part, completing the demolding operation.
[0040] like Figure 1 , Figure 4 and Figure 7As shown, preferably, the sliding mechanism 20 is further provided with a sliding seat 30, a sliding pressure block 40 and an inclined guide post 12. The sliding pressure block 40 is fixedly connected to the front mold assembly, the inclined guide post 12 is fixedly connected to the sliding pressure block 40, the sliding insert 21 is fixedly connected to the sliding seat 30, the sliding seat 30 is slidably connected to the rear mold assembly, and the sliding seat 30 is provided with an inclined guide hole 31, so that the inclined guide post 12 passes through the inclined guide hole 31, thereby driving the sliding seat 30 and the sliding insert 21 to move laterally.
[0041] Specifically, in order to drive the slide insert 21 to move laterally, a slide pressure block 40 and an inclined guide post 12 can be set on the front mold assembly. At the same time, an inclined guide hole 31 matching the inclined guide post 12 can be set on the slide seat 30. By using the movement of the front mold assembly during the mold opening or closing process, the inclined guide post 12 is driven to move synchronously along the mold opening and closing direction. Then, by using the cooperation between the inclined guide post 12 and the inclined guide hole 31, the slide seat 30 and the slide insert 21 are driven to move laterally.
[0042] like Figures 1 to 6 As shown, preferably, the inclined ejector mechanism 50 is further provided with an auxiliary rod 54, and the slide seat 30 is provided with a first through hole 32. The auxiliary rod 54 passes through the first through hole 32, and one end of the auxiliary rod 54 is fastened to the inclined ejector rod 51, and the other end extends out of the slide seat 30 and is provided with a first inclined surface 55. The slide pressure block 40 is provided with a first abutment 42 parallel to the mold closing direction at one end away from the injection cavity. The first abutment 42 abuts against the end of the inclined ejector rod 51 that is provided with the first inclined surface 55, thereby driving the inclined ejector rod 51 to move towards the injection cavity to complete the mold closing operation.
[0043] Specifically, during mold closing, the inclined top position 52 of the inclined ejector pin 51 needs to be moved towards the injection cavity. Driven by the guide inclined hole 22 of the slide insert 21, the inclined ejector pin 51 is driven to move longitudinally a certain distance, so that it cooperates with the slide insert 21 and works together to form the mold structure of the undercut side of the injection molded plastic part.
[0044] Secondly, in order to drive the inclined ejector rod 51 to move towards the injection cavity, an auxiliary rod 54 can be provided at the end of the inclined ejector rod 51 away from the injection cavity. The auxiliary rod 54 and the inclined ejector rod 51 are connected by a snap-fit mechanism, allowing the auxiliary rod 54 to drive the inclined ejector rod 51 to move laterally. Simultaneously, a first abutment block 42 is provided on the sliding block 40. During mold closing, the first abutment block 42 moves in the mold closing direction along with the sliding block 40. The first abutment block 42 can be driven by the end of the auxiliary rod 54 with the first inclined surface 55, causing it to move towards the injection cavity.
[0045] Secondly, the fastening connection between the auxiliary rod 54 and the inclined push rod 51 can adopt a pre-existing concave-convex fit fastening connection structure. For example, a groove can be provided at the end of the auxiliary rod 54, and a boss can be provided at the end of the inclined push rod 51 to achieve the fastening connection. It should be noted that in the concave-convex fit fastening connection, the fastening connection is performed along the axial direction of the auxiliary rod 54 (i.e., the auxiliary rod 54). Figure 3 In the transverse direction (in the middle), the inclined push rod 51 can be restricted or driven; while in the axial direction perpendicular to the auxiliary rod 54 and parallel to the bottom of the groove (i.e., the auxiliary rod 54), the inclined push rod 51 can be restricted or driven; Figure 3 (In the longitudinal direction), the inclined ejector rod 51 can move a certain distance in the longitudinal direction, so as to perform mold closing or demolding at the side undercut position.
[0046] In addition, in order to facilitate the driving of the first inclined surface 55 of the auxiliary rod 54, the first abutment 42 is also provided with a corresponding auxiliary inclined surface 43 at the end that first abuts the auxiliary rod 54, so that when the mold is closed, the auxiliary inclined surface 43 of the first abutment 42 can be connected to the first inclined surface 55 of the auxiliary rod 54, thereby driving the auxiliary rod 54 to move towards the injection cavity.
[0047] like Figures 2 to 6 As shown, preferably, the sliding mechanism 20 is further provided with a first long strip 23, which is fixed to the sliding insert 21. The inclined push rod 51 is provided with a first notch 53 extending a certain length laterally corresponding to the position of the first long strip 23, so that the first long strip 23 falls into the first notch 53 and slides within the first notch 53. The sliding insert 21 drives the first long strip 23 to move laterally, so that the first long strip 23 abuts against the side wall of the first notch 53 away from the injection cavity, thereby driving the inclined push rod 51 to move laterally.
[0048] Specifically, in order to move the inclined ejector rod 51 away from the injection cavity for mold opening, a first notch 53 can be made on the side wall at the middle position of the inclined ejector rod 51, so that the first long strip 23 fixed inside the slide insert 21 can move within the first notch 53. When the slide insert 21 moves to the preset position, the first long strip 23 abuts against the side wall of the first notch 53 away from the injection cavity, thereby driving the inclined ejector rod 51 to move laterally and completing the mold opening operation of the inclined ejector rod 51.
[0049] like Figure 7 and Figure 8 As shown, preferably, it also includes a limiting component 60, which is fixed to the rear mold component to limit the position seat 30.
[0050] Specifically, the sliding mechanism 20 needs to move laterally a certain distance during the mold opening process, and during the mold closing process, the sliding mechanism 20 needs to be able to return to its original position safely. Therefore, a limiting device must be installed on the sliding mechanism 20, and the limiting device must be flexible and reliable to ensure that the sliding mechanism 20 can be restricted to its original position.
[0051] like Figure 7 and Figure 8 As shown, preferably, the limiting component 60 is provided with a limiting bolt 61, and the bottom of the sliding seat 30 is provided with a limiting notch 33 corresponding to the position of the limiting bolt 61. The screw head of the limiting bolt 61 is located in the limiting notch 33. The sliding seat 30 moves laterally a certain distance away from the injection molding cavity, so that the side wall of the limiting notch 33 close to the injection molding cavity abuts against the screw head of the limiting bolt 61, forming a limiting operation.
[0052] Specifically, in order to form an accurate limiting operation for the slide seat 30, it is preferable to install a limiting bolt 61 on the rear mold assembly, and use the limiting notch 33 provided at the bottom of the slide seat 30 to avoid the limiting bolt 61, so that the slide seat 30 can move normally a certain distance away from the injection cavity. Then, the side wall of the limiting notch 33 near the injection cavity can abut against the limiting bolt 61, so as to form an accurate limiting device to limit the lateral movement of the slide seat 30.
[0053] However, relying solely on the hard contact between the limiting bolt 61 and the limiting notch 33 for limiting has certain drawbacks. To further optimize the limiting effect and protect the mold, a limiting clamp 62 can also be set.
[0054] like Figure 8 As shown, preferably, the limiting component 60 is further provided with a limiting clamp 62, and the bottom of the sliding seat 30 is provided with a limiting post 34. The sliding seat 30 moves laterally a certain distance, so that the limiting post 34 moves synchronously and enters the clamping range of the limiting clamp 62, thereby being clamped by the limiting clamp 62 to form a limiting operation.
[0055] Specifically, since the contact between the limiting bolt 61 and the side wall of the limiting notch 33 is a hard contact, the slide seat 30 is easily suddenly limited during movement, resulting in an impact, which is not conducive to extending the service life of the mold. Therefore, a limiting clamp 62 can also be installed on the rear mold assembly. When the limiting post 34 installed at the bottom of the slide seat 30 moves into the clamping range of the limiting clamp 62, it can be clamped by the limiting clamp 62. The limiting clamp 62 has a certain clamping elasticity, which forms a certain buffer for the movement of the slide seat 30, reduces its impact force, prevents violent shaking, and thus extends the service life of the mold.
[0056] like Figure 7 and Figure 8As shown, preferably, it also includes a pressure strip 11, which is fixed to the rear mold assembly and limits the slide seat 30 in the mold opening direction, so that the slide seat 30 can move laterally along the long side of the pressure strip 11.
[0057] Specifically, in order to make the lateral movement of the slide seat 30 more precise and prevent jitter in the mold opening direction, a pressure strip 11 can be set in the mold opening direction to limit the slide seat 30 in the mold opening direction.
[0058] like Figure 8 As shown, preferably, the slide block 40 is also provided with a slide shovel base 41, which is used to lock the slide seat 30 when the mold is closed.
[0059] Specifically, in order to lock the slide seat 30, a slide shovel base 41, as in the prior art, can be provided on the slide pressure block 40, so that when the mold is closed, the slide seat 30 is locked by mechanical structure to prevent it from moving back due to injection pressure or vibration, thereby ensuring the product molding accuracy.
[0060] During the injection molding process, when the mold is closed, the slide block 40 drives the inclined guide post 12 to move. Through the cooperation of the inclined guide post 12 and the inclined guide hole 31, the slide seat 30 and the slide insert 21 are driven to move laterally towards the injection cavity. At the same time, the first abutment block 42 drives the inclined ejector rod 51 to move towards the injection cavity through the auxiliary rod 54. Subsequently, the lateral movement of the guide inclined hole 22 of the slide insert 21 will generate a component force perpendicular to the lateral movement direction on the inclined ejector rod 51 through its inner wall, thereby driving the inclined ejector rod 51 to move longitudinally, so that the inclined top position 52 of the inclined ejector rod 51 cooperates with the slide insert 21 to form the structure of the undercut position on the injection side, thus completing the preparation for mold closing.
[0061] After injection molding, the mold opens, and the front mold assembly separates from the rear mold assembly. The inclined guide post 12 drives the slide seat 30 and the slide insert 21 to move laterally away from the injection cavity. At the same time, the lateral movement of the guide inclined hole 22 of the slide insert 21 will generate a component force perpendicular to the lateral movement direction on the inclined ejector rod 51 through its inner wall, thereby driving the inclined ejector rod 51 to move longitudinally, so that the inclined top position 52 of the inclined ejector rod 51 gradually disengages from the undercut position on the side of the plastic part. Subsequently, during the movement of the slide insert 21, the inclined ejector rod 51 is driven to move laterally through the first long strip 23, so that the inclined ejector rod 51 is demolded from the undercut position on the side of the plastic part. Finally, the limiting assembly 60 limits the slide seat 30 to ensure the stability of the mold structure and facilitate the next injection molding operation.
[0062] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. An injection molding structure combining a sliding element and a slanted top, characterized in that, The system includes a front mold assembly, a rear mold assembly, a sliding mechanism (20), and a slanted ejector mechanism (50). The front mold assembly is provided with a front mold core, and the rear mold assembly is provided with a rear mold core (10). The sliding mechanism (20) is provided with a sliding insert (21). The front mold core, the rear mold core (10), and the sliding insert (21) cooperate with each other to form an injection cavity. The sliding insert (21) is located on the side of the injection cavity and is used to injection mold the side wall of the plastic part. The slanted ejector mechanism (50) is provided with a slanted ejector rod (51), and the sliding insert (21) is provided with a guide slanted hole (22). The slanted ejector rod (51) passes through the guide slanted hole (22) and cooperates with the sliding insert (21) to injection mold the undercut position on the side of the plastic part.
2. The injection molding structure combining a sliding position and a sloping top as described in claim 1, characterized in that, The sliding mechanism (20) is also provided with a sliding seat (30), a sliding pressure block (40) and an inclined guide post (12). The sliding pressure block (40) is fixed to the front mold assembly, the inclined guide post (12) is fixed to the sliding pressure block (40), the sliding insert (21) is fixed to the sliding seat (30), the sliding seat (30) is slidably connected to the rear mold assembly, and the sliding seat (30) is provided with an inclined guide hole (31) so that the inclined guide post (12) passes through the inclined guide hole (31), thereby driving the sliding seat (30) and the sliding insert (21) to move laterally.
3. The injection molding structure combining a sliding position and a sloping top as described in claim 2, characterized in that, The inclined ejector mechanism (50) is also provided with an auxiliary rod (54). The slide seat (30) is provided with a first through hole (32). The auxiliary rod (54) passes through the first through hole (32). One end of the auxiliary rod (54) is fastened to the inclined ejector rod (51), and the other end extends out of the slide seat (30) and is provided with a first inclined surface (55). The slide pressure block (40) is provided with a first abutment (42) parallel to the mold closing direction at one end away from the injection cavity. The first abutment (42) abuts against the end of the inclined ejector rod (51) provided with the first inclined surface (55), thereby driving the inclined ejector rod (51) to move towards the injection cavity to complete the mold closing operation.
4. The injection molding structure combining a sliding position and a sloping top as described in claim 3, characterized in that, The sliding mechanism (20) is also provided with a first long strip (23), which is fixed to the sliding insert (21). The inclined push rod (51) is provided with a first notch (53) extending a certain length laterally corresponding to the position of the first long strip (23), so that the first long strip (23) falls into the first notch (53) and slides in the first notch (53); the sliding insert (21) drives the first long strip (23) to move laterally, so that the first long strip (23) abuts against the side wall of the first notch (53) away from the injection cavity, thereby driving the inclined push rod (51) to move laterally.
5. The injection molding structure combining a sliding position and a slanted top as described in claim 1, characterized in that, It also includes a limiting component (60), which is fixed to the rear mold assembly to limit the position seat (30).
6. The injection molding structure combining a sliding position and a slanted top as described in claim 5, characterized in that, The limiting assembly (60) is provided with a limiting bolt (61), and the bottom of the sliding seat (30) is provided with a limiting notch (33) corresponding to the position of the limiting bolt (61). The screw head of the limiting bolt (61) is located in the limiting notch (33). The sliding seat (30) moves laterally a certain distance away from the injection cavity, so that the side wall of the limiting notch (33) close to the injection cavity abuts against the screw head of the limiting bolt (61), forming a limiting operation.
7. The injection molding structure combining a sliding position and a slanted top as described in claim 5, characterized in that, The limiting component (60) is also provided with a limiting clamp (62), and the bottom of the moving seat (30) is provided with a limiting post (34). The moving seat (30) moves a certain distance to the side, so that the limiting post (34) moves synchronously and enters the clamping range of the limiting clamp (62), and is thus clamped by the limiting clamp (62) to form a limiting operation.
8. The injection molding structure combining a sliding position and a slanted top as described in claim 1, characterized in that, It also includes a pressure strip (11), which is fixed to the rear mold assembly and limits the slide seat (30) in the mold opening direction, so that the slide seat (30) can move laterally along the long side of the pressure strip (11).
9. The injection molding structure combining a sliding position and a slanted top according to claim 1, characterized in that, The slide block (40) is also provided with a slide shovel base (41) for locking the slide seat (30) when the mold is closed.