Sectional type pitched roof demolding injection mold of automobile central channel

Abstract

The invention relates to the field of automotive trim injection molds, and discloses a sectional type pitched roof demolding injection mold of an automobile central channel, the sectional type pitched roof demolding injection mold comprises a mold frame and a sliding block mechanism, and the mold frame comprises a fixed mold and a movable mold; the sliding block mechanism comprises a main sliding block and an inclined guide column; a sectional type pitched roof demolding mechanism is arranged between the main sliding block and the fixed mold and comprises an auxiliary sliding block, a pitched roof and a matching assembly; the matching assembly is used for driving the pitched roof to release at the initial stage of mold opening and guiding the auxiliary sliding block to reset at the later stage of mold closing; the auxiliary sliding block is nested in the chute of the main sliding block and slides along the chute, the chute is downwards inclined towards the center of the mold, and the pitched roof is fixed on one side, close to the center of the mold, of the auxiliary sliding block and is used for forming an internal inverted buckle of a product, and the inclination is greater than 20 degrees; the matching assembly comprises a blocking face arranged on the fixed mold, a limiting piece fixed to the fixed mold and a positioning groove formed in the auxiliary sliding block, the mold can be matched with a large-angle inclined top through sectional type demolding, and automatic and accurate demolding of a deep buckle can be achieved only by means of mold opening force.

Description

Technical Field

[0001] This invention relates to the field of automotive interior injection molds, and more particularly to a segmented inclined ejector injection mold for automotive central tunnel. Background Technology

[0002] Existing automotive center consoles, while providing conventional storage functions, also integrate features such as cup holders, wireless charging modules, and even small in-car refrigerators, leading to increasing structural complexity. For injection molds used to mold these complex automotive center consoles, the side core-pulling structure is crucial for ensuring successful product demolding. Specifically, to mold the complex undercuts and deep ribs on the sides and inside of the product, the mold typically requires large side slides with long, angled ejectors (greater than 20°) on these slides.

[0003] As the angle and length of the ejector increase, the force required for ejector demolding also increases. The conventional method of demolding the product by means of mold opening force with the help of inclined guide pillars will result in insufficient demolding force. It is necessary to use additional drive structures such as hydraulic cylinders to drive the large slider to move. Adding hydraulic cylinders will increase the cost of mold, prolong the mold opening and closing time, and encroach on the internal space of mold. Moreover, when the angle of the ejector exceeds 15°, the ejector is prone to poor force during demolding, which may lead to problems such as bending, deformation or even jamming. Summary of the Invention

[0004] This invention addresses the shortcomings of existing automotive center consoles, which, due to their complex structure, require the use of long, angled ejectors for demolding. These ejectors are prone to deformation and require hydraulic cylinders to provide the force needed for core pulling. The invention provides a segmented angled ejector injection mold for automotive center consoles, overcoming the problems of easily deformable ejectors and the need for hydraulic cylinders for demolding.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A segmented inclined ejector demolding injection mold for a car center console includes a mold base and a slider mechanism. The mold base includes a fixed mold and a moving mold. The slider mechanism includes a main slider and an inclined guide post. The main slider slides horizontally on the moving mold, and one end of the inclined guide post is fixed to the fixed mold. The inclined guide post cooperates with the main slider during mold opening and closing to drive the main slider to slide horizontally. A segmented inclined ejector demolding mechanism is provided between the main slider and the fixed mold. The segmented inclined ejector demolding mechanism includes a secondary slider, an inclined ejector, and a mating component that drives the inclined ejector to disengage during the initial stage of mold opening and guides the secondary slider to reset during the later stage of mold closing. The secondary slider is nested in the inclined groove of the main slider and moves along the inclined groove. The sliding groove is inclined downwards towards the center of the mold, and the inclined top is fixed on the side of the secondary slider near the center of the mold. It is used to form the internal undercut of the product and the inclination is greater than 20°. The mating components include a stop surface set on the fixed mold, a limiting member fixed on the fixed mold, and a positioning groove opened on the secondary slider. When the mold is opened, the limiting member and the positioning groove gradually disengage from the insertion, and the stop surface and the secondary slider gradually disengage from the abutment. When the stop surface and the secondary slider are in the abutment state, they apply a force towards the center of the mold to the secondary slider. When the mold is closed, the limiting member and the positioning groove gradually insert from the disengagement, and the secondary slider gradually returns to the initial state as the limiting member and the positioning groove are inserted.

[0006] The above scheme employs a segmented inclined ejector demolding mechanism. The mating components in this mechanism decompose the ejection of the inclined ejector into two stages: In the initial mold opening stage, the fixed mold stop forcefully drives the inclined ejector towards the center to disengage, preventing the large-angle inclined ejector from jamming or bending due to insufficient core-pulling force; in the later mold opening stage, the secondary slider disengages from the stop and moves away from the mold center synchronously with the main slider, achieving a secondary follow-up disengagement of the inclined ejector; in the initial mold closing stage, the secondary slider moves closer to the mold center synchronously with the main slider; in the later mold closing stage, with the insertion of the limiting component and the positioning groove, the secondary slider slides back along the inclined groove relative to the main slider to reset, ensuring the inclined ejector accurately returns to the molding position, guaranteeing the accuracy and consistency of product dimensions, and effectively avoiding defects such as flash and excess glue. In this mechanism, the length of the inclined ejector can be significantly shortened, and even with a moderately increased inclination angle, the inclined ejector is not easily deformed. The power required for mold opening is sufficient to meet the disengagement force, eliminating the need for an additional hydraulic cylinder, simplifying the mold structure, shortening the molding cycle, and reducing equipment and maintenance costs.

[0007] Preferably, the positioning groove is larger than the limiting member, and an extension section is integrally formed on the fixed mold core of the fixed mold. The extension section is inserted into the inclined groove in the later stage of mold closing and drives the secondary slider to move a preset stroke towards the stop surface, so that the limiting member and the inner wall of the positioning groove are in a non-tight state.

[0008] By adopting the above solution, it can be ensured that the limiting component and the positioning groove are in a non-tightening state in the final mold closing state, avoiding the limiting component from being subjected to strong extrusion force during high-pressure injection molding, reducing its wear, and thus extending the mold life; in addition, the fine adjustment action of the extension section, after the coarse positioning of the inclined guide post, performs secondary precise positioning driven by the mold forming surface itself, further ensuring the final forming position accuracy of the secondary slider and the inclined ejector.

[0009] Preferably, the limiting component is a limiting rod that is vertically fixed on the fixed mold. The side wall of the limiting rod has a keyway, and a flat key is horizontally inserted into the keyway. The flat key and the fixed mold are fixedly connected by fastening bolts.

[0010] Compared to a simple threaded connection, the above solution provides stronger resistance to torsion and shear, ensuring that the limit rod remains stable in position during long-term use and is not prone to loosening or shifting. In addition, the above installation method is relatively convenient for assembly and disassembly.

[0011] Preferably, a wear-resistant block is fixed on the side of the auxiliary slider near the stop surface. After the mold is closed, the wear-resistant block and the stop surface are in a non-tightly state.

[0012] By adopting the above solution, wear-resistant blocks are added as consumable parts to reduce damage to the secondary slider and reduce mold maintenance costs. The "non-tightening after mold closing" design ensures that the wear-resistant blocks and the stop surface only come into contact during the initial working stage of mold opening and do not interfere with each other in the mold closing state. This avoids the additional stress generated by the rigid contact between the two during high-pressure injection molding and reduces the wear of the limit rod and the secondary slider.

[0013] Preferably, the secondary slider is provided with at least one inclined top, and when there is more than one inclined top, the inclined tops are arranged parallel to each other.

[0014] The above solution allows for the installation of multiple angled ejectors on the same secondary slide block, enabling the simultaneous molding of undercuts at multiple locations. This meets the functional integration requirements of modern automotive central access systems. During demolding, these angled ejectors, due to their parallel arrangement, ensure that their movement trajectories and speeds are completely consistent, avoiding problems such as product tearing, deformation, or mold jamming caused by uncoordinated movement.

[0015] Preferably, the inclination angle of the sloping top is in the range of 20°-30°.

[0016] Using the above solution, an inclination angle greater than 15° in the conventional long inclined ejector setting already leads to the problem of the long inclined ejector being prone to deformation. However, the segmented demolding structure achieved by embedding the secondary slider in the main slider of this design can significantly shorten the length of the inclined ejector. Correspondingly, the inclined ejector can adapt to a larger angle without easily deforming, and the force required for demolding can also be significantly reduced.

[0017] Preferably, a side core-pulling structure is provided on the side of the auxiliary slider where the inclined top is provided. The side core-pulling structure includes a molding slider with a local cavity at the head, which is set horizontally. The end of the molding slider away from the molding end is vertically guided and set on the auxiliary slider.

[0018] By adopting the above solution and adding a side core-pulling structure, it can be adapted to products with undercuts in different internal directions, significantly improving the performance of the mold.

[0019] Preferably, a guide seat is fixed on the secondary slider, and a guide groove with a sealed bottom is vertically provided on the guide seat. A connecting rod is fixed at the end of the forming slider away from the forming end, and the end of the connecting rod away from the forming slider is embedded in the guide groove for sliding.

[0020] By using the above solution, the oblique motion of the secondary slider is cleverly converted into the vertical motion required by the forming slider by using the "guide seat" and "guide groove" fixed on the secondary slider. The whole process does not require any additional power source, and the structure is simple, the response is fast and the failure rate is low.

[0021] This invention, by employing the above technical solutions, achieves significant technical advantages: A segmented inclined ejector demolding mechanism is set up, in which the mating components decompose the ejection of the inclined ejector into two stages: In the initial stage of mold opening, the fixed mold stop surface forcibly drives the inclined ejector to disengage towards the center, preventing the large-angle inclined ejector from jamming or bending due to insufficient core-pulling force; in the later stage of mold opening, the secondary slider disengages from the stop surface, and the secondary slider and main slider synchronously move away from the mold center, achieving a secondary follow-up disengagement of the inclined ejector; in the initial stage of mold closing, the secondary slider and main slider synchronously approach the mold center; in the later stage of mold closing, with the insertion of the limiting component and the positioning groove, the secondary slider slides back along the inclined groove relative to the main slider to reset, ensuring the inclined ejector accurately returns to the molding position, guaranteeing the accuracy and consistency of product dimensions, and effectively avoiding defects such as flash and excess glue. In the above mechanism, the length of the inclined ejector can be significantly shortened, and the moderately increased inclination angle of the inclined ejector is not easily deformed. The power of mold opening is sufficient to meet the force required for disengagement, eliminating the need for an additional hydraulic cylinder, simplifying the mold structure, shortening the molding cycle, and reducing equipment and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a front view of a segmented inclined ejector injection mold for a car center console according to this embodiment; Figure 2 yes Figure 1 A sectional view of AA; Figure 3 yes Figure 2 A magnified view of A; Figure 4 yes Figure 1 A cross-sectional view of BB; Figure 5 yes Figure 4A magnified view of B; Figure 6 yes Figure 1 A cross-sectional view of CC; Figure 7 It is an isometric view of the moving model; Figure 8 yes Figure 7 A magnified view of C; Figure 9 It is an isometric view of the interaction between the auxiliary slider, the angled ejector, the forming slider and the product in the mold closed state; Figure 10 yes Figure 9 A magnified view of D; Figure 11 This is an isometric view of the sub-slider, inclined top, forming slider, and limiting rod after assembly in this embodiment.

[0023] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Fixed mold; 101. Stop surface; 2. Moving mold; 3. Main slide block; 301. Inclined groove; 302. Clearance groove; 4. Extension section; 5. Secondary slide block; 501. Positioning groove; 502. Boss; 6. Wear-resistant block; 7. Angled ejector; 8. Forming slide block; 9. Connecting rod; 10. Limiting rod; 11. Angled guide post; 12. Vertical guide post; 13. Pressure strip; 14. Flat key; 15. Fastening bolt; 16. Guide seat; 161. Guide groove. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] A segmented, angled ejector injection mold for a car's central tunnel, as shown in the reference. Figures 1-11 As shown, the mold includes a mold frame and a slider mechanism. The mold includes a fixed mold 1 and a moving mold 2. A fixed mold core is fixed on the fixed mold 1, and a moving mold core is fixed on the moving mold 2. Vertical guide pillars 12 are provided at the four corners of the moving mold 2, and vertical guide holes that cooperate with the vertical guide pillars 12 are provided at the four corners of the fixed mold 1. The slider mechanism includes a main slider 3 and an inclined guide pillar 11. The main slider 3 slides horizontally on the moving mold 2, and one end of the inclined guide pillar 11 is fixed on the fixed mold 1. During the mold opening and closing process, the inclined guide pillar 11 cooperates with the inclined hole on the main slider 3 and drives the main slider 3 to move horizontally. When the mold is closed, the main slider 3 is close to the center of the mold; when the mold is opened, the main slider 3 is away from the center of the mold.

[0026] When the mold is closed, a cavity with the same shape as the product is formed between the fixed mold 1, the moving mold 2, the fixed mold core, the moving mold core and the main slide block 3. The above is the prior art.

[0027] A segmented inclined ejector demolding mechanism is provided between the main slider 3 and the fixed mold 1. The segmented inclined ejector demolding mechanism includes a secondary slider 5, an inclined ejector 7, and a cooperating component that drives the inclined ejector 7 to disengage in the early stage of mold opening and guides the secondary slider 5 to reset in the later stage of mold closing.

[0028] Reference Figures 2-3 As shown, a downward inclined groove 301 is provided on the main slider 3, which is inclined towards the center of the mold. The lower end of the inclined groove 301 is sealed and the upper end is slotted. The secondary slider 5 is guided and slids on the inclined groove 301 by the pressure strip 13. The two sides of the secondary slider 5 are symmetrically provided with bosses 502 with the same inclination as the inclined groove 301. The inclination of the pressure strip 13 is the same as that of the bosses 502 and is located above the bosses 502. The pressure strip 13 is fixed to the main slider 3 by bolts. Two sets of inclined tops 7 are provided and fixed at the end of the secondary slider 5 near the center of the mold. The two sets of inclined tops 7 are parallel to each other and inclined downward towards the center of the mold. The inclination angle of the inclined tops 7 is 28°.

[0029] Combination Figures 4-5 As shown, the mating components include a stop surface 101 disposed on the fixed mold 1, a limiting member fixed on the fixed mold 1, and a positioning groove 501 opened on the secondary slider 5. The stop surface 101 is located at the slotted end of the inclined groove 301. The stop surface 101 is a vertical surface. The surface of the secondary slider 5 that mates with the stop surface 101 is also a vertical surface. When the mold is opened, the limiting member and the positioning groove 501 gradually disengage from the insertion position. The stop surface 101 and the secondary slider 5 gradually disengage from the contact position as the limiting member and the positioning groove 501 mate. When the stop surface 101 and the secondary slider 5 are in the contact position, the stop surface 101 applies a force toward the center of the mold to the secondary slider 5, completing the product release. After the stop surface 101 and the secondary slider 5 disengage, the secondary slider 5 encounters the main slider 3 and moves away from the center of the mold simultaneously, completing the secondary demolding. When the mold is closed, the limiting member and the positioning groove 501 gradually insert from the disengagement position. The secondary slider 5 gradually returns to its initial state as the limiting member and the positioning groove 501 insert.

[0030] A wear-resistant block 6 is fixed to one side of the auxiliary slider 5 opposite to the stop surface 101 by bolts. A wear-resistant plate is also fixed to the bottom of the auxiliary slider 5. The positioning groove 501 on the auxiliary slider 5 is waist-shaped. The limiting member is a limiting rod 10 that is vertically fixed on the fixed mold 1. The length of the positioning groove 501 is greater than the diameter of the limiting rod 10. An extension section 4 is integrally formed on the fixed mold core. After the mold is closed, the extension section 4 is inserted into the inclined groove 301 and drives the auxiliary slider 5 to move a preset stroke towards the stop surface 101, so that the limiting rod 10 and the inner wall of the positioning groove 501 are in a non-tight state. At this time, the wear-resistant block 6 and the stop surface 101 are also in a non-tight state.

[0031] Combination Figure 11 As shown, a keyway is provided on the side wall of the limiting rod 10, and a flat key 14 is horizontally inserted into the keyway. The flat key 14 has a mounting hole. The fastening bolt 15 passes through the mounting hole and connects to the threaded hole on the fixed mold 1 to realize the fixed installation of the limiting rod 10 and the fixed mold 1.

[0032] On the side of the secondary slider 5 where the inclined top 7 is located, a core-pulling structure is also provided, combined with... Figure 3 and Figure 11As shown, the core-pulling structure includes a horizontally arranged molding slider 8 with a partial cavity at its head. A connecting rod 9 is fixed to one end of the molding slider 8 away from the molding end. A guide seat 16 is fixed on the secondary slider 5. The guide seat 16 is provided with a guide groove 161 with a "T" shaped cross section and a sealed bottom. The guide grooves 161 are vertically distributed and the larger end of the guide grooves 161 faces inward. The end of the connecting rod 9 away from the molding slider 8 is embedded and slides in the guide groove 161.

[0033] The mold-making process using the above-mentioned mold is as follows: Phase 1: Detachment When the moving mold 2 moves away from the fixed mold 1, the main slide block 3 moves slowly away from the center of the mold under the action of the inclined guide post 11. The stop surface 101 and the wear-resistant block 6 on one side of the auxiliary slide block 5 remain in abutting state. The stop surface 101 gives the auxiliary slide block 5 a force towards the center of the mold, forcing the auxiliary slide block 5 to slide down along the inclined groove 301 of the main slide block 3. The movement of the auxiliary slide block 5 drives the inclined ejector 7 on it to move synchronously, realizing the ejector 7 to disengage from the undercut inside the product. During this stage, the limit rod 10 is always in the insertion state with the positioning groove 501.

[0034] Phase Two: Core Removal As the moving mold 2 moves further away from the fixed mold 1, the limiting component completely disengages from the positioning groove 501, and the secondary slider 5 completely disengages from the stop surface 101. The motion state of the secondary slider 5 is switched from being driven by the stop surface 101 to being driven by the main slider 3. When the main slider 3 continues to move outward horizontally under the drive of the inclined guide post 11, the secondary slider 5 moves away from the center of the mold along with the main slider 3. The inclined ejector 7 and the forming slider 8 move away from the product, thus completing the core pulling.

[0035] The mold closing process using the above-mentioned mold is as follows: Phase 1: Mold Closure and Rough Positioning When the moving mold 2 approaches the fixed mold 1, the inclined guide post 11 is inserted into the inclined hole of the main slider 3, driving the main slider 3 to move quickly towards the center of the mold. The auxiliary slider 5 moves towards the center of the mold along with the main slider 3, preparing to return to the forming position.

[0036] Phase Two: Mold Closure and Precision Positioning As the moving mold 2 continues to approach the fixed mold 1, the limiting rod 10 is inserted into the positioning groove 501. The limiting rod 10 applies a force to the secondary slider 5 away from the center of the mold, causing the secondary slider 5 to be in a limited state, while the main slider 3 continues to move towards the center of the mold. The secondary slider 5 moves obliquely upward relative to the main slider 3. In the later stage of mold closing, the extension section 4 is inserted into the inclined groove 301, causing the secondary slider 5 to move obliquely upward for a preset micro stroke, so as to achieve the final precise positioning of the inclined ejector 7. At the same time, the limiting rod 10 and the inside of the positioning groove 501 are in a non-compacting state, and the wear-resistant block 6 and the stop surface 101 are in a non-compacting state, which protects the mold and ensures the molding accuracy.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A segmented inclined ejector injection mold for a central tunnel of an automobile, comprising a mold frame and a slider mechanism, the mold frame comprising a fixed mold (1) and a moving mold (2); the slider mechanism comprising a main slider (3) and an inclined guide post (11), the main slider (3) being horizontally guided and slidable on the moving mold (2), one end of the inclined guide post (11) being fixed on the fixed mold (1), the inclined guide post (11) cooperating with the main slider (3) during the mold opening and closing process to drive the main slider (3) to achieve horizontal sliding; characterized in that: A segmented inclined ejector demolding mechanism is provided between the main slider (3) and the fixed mold (1). The segmented inclined ejector demolding mechanism includes a secondary slider (5), an inclined ejector (7), and a mating component that drives the inclined ejector (7) to disengage in the early stage of mold opening and guides the secondary slider (5) to reset in the later stage of mold closing. The secondary slider (5) is nested in the inclined groove (301) of the main slider (3) and slides along the inclined groove (301). The inclined groove (301) is inclined downward toward the center of the mold. The inclined ejector (7) is fixed on the side of the secondary slider (5) near the center of the mold and is used to form the internal undercut of the product with an inclination greater than 20°. The mating component includes a segmented inclined ejector (7) that drives the inclined ejector (7) to disengage in the early stage of mold opening and guides the secondary slider (5) to reset in the later stage of mold closing. The stop surface (101) placed on the fixed mold (1), the limiting member fixed on the fixed mold (1), and the positioning groove (501) opened on the secondary slider (5) are as follows: when the mold is opened, the limiting member and the positioning groove (501) gradually separate from the insertion, the stop surface (101) and the secondary slider (5) gradually separate from the abutment, and the stop surface (101) and the secondary slider (5) apply a force toward the center of the mold to the secondary slider (5) in the abutment state; when the mold is closed, the limiting member and the positioning groove (501) gradually insert from the separation, and the secondary slider (5) gradually returns to the initial state as the limiting member and the positioning groove (501) are inserted.

2. The segmented inclined ejector injection mold for a car center console according to claim 1, characterized in that: The positioning groove (501) is larger than the limiting member. An extension section (4) is integrally formed on the fixed mold core of the fixed mold (1). The extension section (4) is inserted into the inclined groove (301) in the later stage of mold closing and drives the secondary slider (5) to move a preset stroke towards the stop surface (101), so that the limiting member and the inner wall of the positioning groove (501) are in a non-tight state.

3. The segmented inclined ejector injection mold for a car center console according to claim 2, characterized in that: The limiting component is a limiting rod (10) that is vertically fixed on the fixed mold (1). The side wall of the limiting rod (10) is provided with a keyway, and a flat key (14) is horizontally inserted in the keyway. The flat key (14) and the fixed mold (1) are fixedly connected by fastening bolts (15).

4. The segmented inclined ejector injection mold for a car center console according to claim 2, characterized in that: A wear-resistant block (6) is fixed on the side of the auxiliary slider (5) near the stop surface (101). After the mold is closed, the wear-resistant block (6) and the stop surface (101) are in a non-tight state.

5. A segmented inclined ejector injection mold for a car center console according to any one of claims 1-4, characterized in that: The secondary slider (5) is provided with at least one inclined top (7), and when there is more than one inclined top (7), the inclined tops (7) are arranged parallel to each other.

6. The segmented inclined ejector injection mold for a car center console according to claim 5, characterized in that: The tilt angle of the sloping top (7) ranges from 20° to 30°.

7. A segmented inclined ejector injection mold for a car center console according to claim 5, characterized in that: A side core-pulling structure is provided on the side of the auxiliary slider (5) where the inclined top (7) is provided. The side core-pulling structure includes a molding slider (8) with a local cavity at the head, which is set horizontally. The end of the molding slider (8) away from the molding end is vertically guided on the auxiliary slider (5).

8. The segmented inclined ejector injection mold for a car center console according to claim 7, characterized in that: A guide seat (16) is fixed on the auxiliary slider (5). A guide groove (161) with a sealed bottom is vertically provided on the guide seat (16). A connecting rod (9) is fixed at one end of the forming slider (8) away from the forming end. The end of the connecting rod (9) away from the forming slider (8) is embedded in the guide groove (161) for sliding.

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