Automobile trim strip processing die
By designing slots and support blocks on the fixed mold platform, combined with inclined guide pillars and oblique holes, the gap between the core-pulling block and the core-pulling slot can be precisely adjusted, solving the problem of difficulty in controlling the gap between the core-pulling block and the core-pulling slot, and improving the efficiency of mold debugging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO BAILIE MOULD&PLASTIC CO LTD
- Filing Date
- 2026-03-03
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, the fit clearance between the core-pulling block and the core-pulling groove is difficult to control precisely, which results in a long debugging time from mold design to actual production, affecting delivery.
The mold base is designed with slots and support blocks. The fit clearance between the core-pulling block and the core-pulling slot is fine-tuned by adjusting the size of the support blocks. Combined with the design of inclined guide pillars and oblique holes, the core-pulling block can be accurately slid and the clearance can be adjusted.
It effectively shortened the mold debugging time, reduced the debugging difficulty, and improved the efficiency from mold design to production.
Smart Images
Figure CN121756526B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of injection molds, and more specifically to a mold for processing automotive decorative strips. Background Technology
[0002] Injection molds are widely used in the automotive parts manufacturing industry due to their high processing efficiency and stable product quality. Automotive trim strips, in particular, often feature special structures such as snap-fits and barbs. These structures cannot be easily demolded by simple top and bottom mold opening, thus requiring a core-pulling mechanism within the mold.
[0003] Injection molds consist of a movable mold that can be raised and lowered, and a fixed mold. The fixed mold has a cavity and a mold platform surrounding the cavity, where the product is injection molded. Common core-pulling mechanisms include guide pillars connected to the movable mold, core-pulling slots formed on the mold platform of the fixed mold, and core-pulling blocks movably positioned within the core-pulling slots. The core-pulling block has a molding surface on the side facing the cavity, the shape of which corresponds to special structures such as snaps or barbs on the product. When the movable mold rises to achieve demolding, the guide pillars move the core-pulling block away from the cavity, causing the molding surface of the core-pulling block to detach from the product, allowing the product to be ejected from the cavity.
[0004] Because the core-pulling block needs to slide within the core-pulling slot, a certain clearance must be maintained between it and the core-pulling slot. However, if this clearance is too large, molten material can easily seep into this clearance during high-pressure injection molding, resulting in noticeable flash or mold lines on the corresponding area of the product surface, which is unacceptable for automotive trim parts with stringent appearance requirements. Considering that the core-pulling block is processed independently of the moving mold, the suitability of the clearance between the core-pulling block and the core-pulling slot can only be determined during trial production after assembly. If the clearance does not meet the requirements, secondary processing of the fixed mold and the core-pulling block is required. For automotive trim parts with many product models and rapid iteration speeds, each mold requires a long debugging time from design to actual production, affecting delivery. Summary of the Invention
[0005] The purpose of this invention is to solve the problem that the fit clearance between the core-pulling block and the core-pulling groove is difficult to control precisely in the prior art, which leads to a long debugging time for each mold from design to actual production, affecting delivery.
[0006] To address the aforementioned problems, this invention provides a processing mold for automotive decorative strips, comprising a movable mold and a fixed mold arranged vertically. The upper side of the fixed mold has a cavity and a mold platform surrounding the cavity. The upper side of the mold platform has a core-pulling groove, which extends laterally and includes a proximal end extending into the cavity and a distal end away from the cavity. The mold also includes:
[0007] The guide post is inclined and the core-pulling block is provided with an inclined hole. The core-pulling block can slide between the proximal end and the distal end of the core-pulling groove. The upper end of the guide post is connected to the moving mold and the lower end is slidably inserted into the inclined hole. When the moving mold rises / falls, the guide post drives the core-pulling block away from / closer to the proximal end of the core-pulling groove through the inclined hole.
[0008] The support block has an insert groove on the upper side of the mold table adjacent to the core-pulling groove. The insert groove extends through the cavity, so that the part of the insert groove and the core-pulling groove near the cavity forms a thin-walled structure. The support block can be detachably filled into the insert groove and push the thin-walled structure to deform slightly in the direction of the core-pulling groove.
[0009] The above solution designs a slot on the mold base of the fixed mold, creating a thin-walled structure near the cavity between the slot and the core-pulling slot. When the core-pulling block is assembled into the core-pulling slot, if the clearance between the core-pulling block and the core-pulling slot is large, a larger support block can be inserted into the slot. The support block pushes the thin-walled structure towards the core-pulling slot, producing a large micro-deformation and effectively reducing the clearance. If the clearance between the core-pulling block and the core-pulling slot is small, a smaller support block can be inserted into the slot. The support block pushes the thin-walled structure towards the core-pulling slot, producing only a small micro-deformation, ensuring that the clearance remains within a reasonable range. Compared to existing technologies, the above solution only requires adjusting the size of the support block to precisely adjust the clearance between the core-pulling block and the core-pulling slot. Compared to existing technologies that require secondary processing of the fixed mold and the core-pulling block, this effectively shortens the debugging time and reduces the debugging difficulty.
[0010] In an improved design, a rounded corner is provided at the junction of the side of the slot away from the cavity and the side near the core-pulling slot. The shape of the support block is adapted to the shape of the slot. The rounded corner design can effectively avoid the problem of cracking at the junction of the side of the slot away from the cavity and the side near the core-pulling slot due to stress concentration when the thin-walled structure undergoes micro-deformation.
[0011] In an improved embodiment, the upper side of the support block has a pry bar protruding from the upper side of the slot, thereby facilitating the operator to remove the support block from the slot by prying the pry bar.
[0012] In an improved embodiment, the bottom of the groove is provided with a screw hole, and the support block is provided with a vertically opened mounting hole. The mounting hole is provided with a bolt that mates with the screw hole, so that the support block can be disassembled and assembled relative to the groove by rotating the bolt, which is simple to operate.
[0013] In an improved embodiment, the upper side of the fixed mold is provided with a guide rail parallel to the core-pulling groove, and the core-pulling block includes a molding part located in the core-pulling groove and a support part slidably connected to the guide rail, thereby improving the accuracy of the sliding direction of the core-pulling block through the sliding connection between the support part and the guide rail.
[0014] In an improved embodiment, the oblique hole is located on the support portion of the core-pulling block and gradually tilts away from the cavity from top to bottom. The guide post is adapted to the tilting direction of the oblique hole, so that when the moving mold rises, the guide post drives the core-pulling block away from the cavity through the oblique hole, and when the moving mold falls, the guide post drives the core-pulling block closer to the cavity through the oblique hole.
[0015] In an improved embodiment, the core-pulling slots are multiple and distributed circumferentially along the mold table. Each core-pulling slot is equipped with a corresponding core-pulling block. The upper side of the mold table is provided with slots corresponding to the positions between any two adjacent core-pulling slots. Each slot is equipped with a corresponding support block, thereby adapting to products with special structures such as multiple snaps and barbs. Attached Figure Description
[0016] Figure 1 A schematic diagram of a mold for processing automotive trim strips;
[0017] Figure 2 This is a schematic diagram of a mold for processing automotive trim strips, with the moving mold removed.
[0018] Figure 3 A top view of a mold for processing automotive trim strips, with the moving mold removed;
[0019] Figure 4 for Figure 3 A magnified view of a portion of region C in the middle;
[0020] Figure 5 For along Figure 3 Cross-sectional view of section AA in the middle;
[0021] Figure 6 For along Figure 3 Schematic diagram of the BB section line.
[0022] Explanation of reference numerals in the attached figures.
[0023] 1. Moving mold; 2. Fixed mold; 21. Cavity; 22. Guide rail; 3. Mold table; 31. Core-pulling slot; 32. Insert slot; 32a. Rounded corner; 32b. Screw hole; 33. Thin-walled structure; 4. Guide post; 5. Core-pulling block; 51. Molding part; 52. Supporting part; 52a. Angled hole; 6. Support block; 61. Skid plate; 62. Mounting hole; 63. Bolt. Detailed Implementation
[0024] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0025] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0026] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0027] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0028] Please see Figures 1-6 An embodiment of the present invention provides a processing mold for automotive decorative strips, comprising a movable mold 1 and a fixed mold 2 arranged vertically. The upper side of the fixed mold 2 is provided with a cavity 21 and a mold platform 3 arranged around the cavity 21. The upper side of the mold platform 3 is provided with a core-pulling groove 31, which extends laterally and includes a proximal end that penetrates into the cavity 21 and a distal end that is away from the cavity 21; it also includes:
[0029] The guide post 4 is inclined and the core-pulling block 5 is provided with an inclined hole 52a. The core-pulling block 5 can slide between the proximal end and the distal end of the core-pulling groove 31. The upper end of the guide post 4 is connected to the moving mold 1 and the lower end is slidably inserted into the inclined hole 52a. When the moving mold 1 rises / falls, the guide post 4 drives the core-pulling block 5 away from / closer to the proximal end of the core-pulling groove 31 through the inclined hole 52a.
[0030] The support block 6 and the upper side of the mold table 3 are adjacent to the core-pulling groove 31 and a slot 32 is also provided. The slot 32 extends through the cavity 21, so that the part of the slot 32 and the core-pulling groove 31 near the cavity 21 forms a thin-walled structure 33. The support block 6 can be detached and filled into the slot 32, and push the thin-walled structure 33 to deform slightly in the direction of the core-pulling groove 31.
[0031] It should be understood that the shapes of the cavity 21, the mold platform 3, and the core-pulling block 5 are designed according to needs, and this design does not limit them. In this embodiment, the mold platform 3 has a ring-shaped structure, and the inner peripheral wall of the mold platform 3 encloses the cavity 21. The proximal end of the core-pulling groove 31 and the insert groove 32 both penetrate to the inner peripheral wall of the mold platform 3. When the support block 6 fills the insert groove 32, the side of the insert groove 32 corresponding to the inner peripheral wall of the mold platform 3 is closed; when the moving mold 1 and the top mold are closed, the core-pulling block 5 closes the proximal end of the core-pulling groove 31. The shape of the end face of the core-pulling block 5 corresponding to the proximal end of the core-pulling groove 31 corresponds to the special structure of the product such as the buckle and barb. This part is the prior art of the core-pulling block 5 and will not be described in detail here.
[0032] The above solution designs a slot 32 on the mold base 3 of the fixed mold 2, forming a thin-walled structure 33 near the cavity 21 between the slot 32 and the core-pulling slot 31. When the core-pulling block 5 is assembled into the core-pulling slot 31, if the fit clearance between the core-pulling block 5 and the core-pulling slot 31 is large, a larger support block 6 can be inserted into the slot 32. The support block 6 pushes the thin-walled structure 33 towards the core-pulling slot 31, producing a large micro-deformation, effectively reducing the fit clearance. If the fit clearance between the core-pulling block 5 and the core-pulling slot 31 is small, a smaller support block 6 can be inserted into the slot 32. The support block 6 pushes the thin-walled structure 33 towards the core-pulling slot 31, producing only a small micro-deformation, ensuring that the fit clearance remains within a reasonable range. Compared with the prior art, the above solution only requires adjusting the size of the support block 6 to precisely adjust the fit clearance between the core-pulling block 5 and the core-pulling slot 31. Compared with the prior art, which requires secondary processing of the fixed mold 2 and the core-pulling block 5, this effectively shortens the debugging time and reduces the debugging difficulty.
[0033] like Figure 4 As shown, as an optimization of this embodiment, a rounded corner 32a is provided at the junction of the side of the groove 32 away from the cavity 21 and the side near the core-pulling groove 31. The shape of the support block 6 is adapted to the shape of the groove 32. The design of the rounded corner 32a can effectively avoid the problem of cracking at the junction of the side of the groove 32 away from the cavity 21 and the side near the core-pulling groove 31 due to stress concentration when the thin-walled structure 33 undergoes micro-deformation.
[0034] like Figure 5 As shown, in this embodiment, the bottom of the groove 32 is provided with a screw hole 32b, and the support block 6 is provided with a vertically opened mounting hole 62. The mounting hole 62 is provided with a bolt 63 that engages with the screw hole 32b. Thus, the support block 6 can be detached from the groove 32 by rotating the bolt 63, which is simple to operate. Of course, the bolt 63 can be replaced with other forms such as a pin, or the support block 6 can be directly inserted into the groove 32. As long as the detachable connection between the support block 6 and the groove 32 can be achieved, it is within the scope of this design and invention concept.
[0035] Furthermore, in order to facilitate the easy assembly and disassembly of the support block 6 relative to the groove 32, the upper side of the support block 6 has a pry plate 61 protruding from the upper side of the groove 32, so that the operator can easily remove the support block 6 from the groove 32 by prying the pry plate 61.
[0036] like Figure 6 As shown, in this embodiment, the upper side of the fixed mold 2 is provided with a guide rail 22 parallel to the core-pulling groove 31. The core-pulling block 5 includes a molding part 51 located in the core-pulling groove 31 and a bearing part 52 slidably connected to the guide rail 22, thereby improving the accuracy of the sliding direction of the core-pulling block 5 through the sliding connection between the bearing part 52 and the guide rail 22.
[0037] Furthermore, the oblique hole 52a is located on the support part 52 of the core-pulling block 5 and gradually tilts away from the cavity 21 from top to bottom. The guide post 4 is adapted to the tilting direction of the oblique hole 52a. Thus, when the moving mold 1 rises, the guide post 4 drives the core-pulling block 5 away from the cavity 21 through the oblique hole 52a. When the moving mold 1 falls, the guide post 4 drives the core-pulling block 5 closer to the cavity 21 through the oblique hole 52a.
[0038] The number of core-pulling slots 31 can be set according to the number of special structures such as buckles and barbs on the product. In this embodiment, there are multiple core-pulling slots 31 distributed along the circumference of the mold table 3. Each core-pulling slot 31 is equipped with a corresponding core-pulling block 5. The upper side of the mold table 3 is provided with a slot 32 corresponding to the position between any two adjacent core-pulling slots 31. Each slot 32 is equipped with a corresponding support block 6.
[0039] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0040] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A mold for processing automotive decorative strips, comprising a movable mold (1) and a fixed mold (2) arranged vertically, characterized in that, The fixed mold (2) has a cavity (21) on its upper side and a mold platform (3) surrounding the cavity (21). The upper side of the mold platform (3) has a core-pulling groove (31). The core-pulling groove (31) extends laterally and includes a proximal end that extends into the cavity (21) and a distal end that is away from the cavity (21). It also includes: An inclined guide post (4) and a core-pulling block (5) with an inclined hole (52a) are provided. The core-pulling block (5) can slide between the proximal and distal ends of the core-pulling groove (31). The upper end of the guide post (4) is connected to the moving mold (1) and the lower end is slidably inserted into the inclined hole (52a). When the moving mold (1) rises / falls, the guide post (4) drives the core-pulling block (5) away from / closer to the proximal end of the core-pulling groove (31) through the inclined hole (52a). The support block (6) has a slot (32) on the upper side of the mold table (3) adjacent to the core-pulling groove (31). The slot (32) extends into the cavity (21), so that the part of the slot (32) and the core-pulling groove (31) close to the cavity (21) forms a thin-walled structure (33). The support block (6) can be detachably filled into the slot (32) and push the thin-walled structure (33) to deform slightly in the direction of the core-pulling groove (31).
2. The automotive trim strip processing mold according to claim 1, characterized in that, The junction of the side of the groove (32) away from the cavity (21) and the side near the core-pulling groove (31) is provided with a rounded corner (32a), and the shape of the support block (6) is adapted to the shape of the groove (32).
3. The automotive trim strip processing mold according to claim 1, characterized in that, The upper side of the support block (6) has a pry plate (61) protruding from the upper side of the groove (32).
4. The automotive trim strip processing mold according to claim 3, characterized in that, The groove (32) has a screw hole (32b) at the bottom, and the support block (6) has a vertically opened mounting hole (62), and the mounting hole (62) has a bolt (63) that connects to the screw hole (32b).
5. The automotive trim strip processing mold according to claim 1, characterized in that, The upper side of the fixed mold (2) is provided with a guide rail (22) parallel to the core-pulling groove (31). The core-pulling block (5) includes a molding part (51) located in the core-pulling groove (31) and a bearing part (52) slidably connected to the guide rail (22).
6. The automotive trim strip processing mold according to claim 5, characterized in that, The oblique hole (52a) is located on the support part (52) of the core-pulling block (5) and gradually tilts away from the cavity (21) from top to bottom. The guide post (4) is adapted to the tilting direction of the oblique hole (52a).
7. The automotive trim strip processing mold according to any one of claims 1-6, characterized in that, The core-pulling slots (31) are multiple and distributed along the circumference of the mold table (3). Each core-pulling slot (31) is equipped with a corresponding core-pulling block (5). The upper side of the mold table (3) is provided with a slot (32) corresponding to the position between any two adjacent core-pulling slots (31). Each slot (32) is equipped with a corresponding support block (6).