Integrated vulcanization mold and vulcanization forming method for automobile stabilizer bar assembly

Abstract

The invention relates to the technical field of automobile stabilizer bar assembly machining, in particular to an automobile stabilizer bar assembly integrated vulcanization mold and a vulcanization forming method.The stabilizer bar assembly comprises a stabilizer bar, a rubber bushing and a metal framework, the rubber bushing and the metal framework wrap the stabilizer bar, the mold comprises a middle mold plate and an upper mold plate which are arranged from bottom to top, and a movable half assembly is arranged between the middle mold plate and the upper mold plate; the annular rubber cavity is jointly formed by the stabilizer bar and the metal framework during mold closing; high-precision positioning and dynamic sealing are achieved through a sealing glue step, a framework positioning pin and a two-stage guiding system. According to the invention, the rubber material is injected through an optimized runner, and full-circumference rubber coating is completed in a single vulcanization period, so that the processes of pre-vulcanization, involution and sheath press fitting of a traditional split bushing are omitted, the peel strength and NVH performance of a product are remarkably improved, abnormal sound is completely eradicated, and the production efficiency is improved by more than 30%.

Description

Technical Field

[0001] This invention relates to the field of automotive stabilizer bar assembly processing technology, and in particular to an integrated vulcanization mold and vulcanization molding method for automotive stabilizer bar assemblies. Background Technology

[0002] A stabilizer bar, also known as a lateral stabilizer bar or anti-roll bar, is an auxiliary elastic element in a car's suspension. Its function is to prevent excessive lateral roll during cornering, maintaining vehicle balance, preventing rollover, and improving ride comfort. Due to the need to avoid other components of the car chassis during installation, stabilizer bars come in various forms, but they are generally integrated structures of a torsion bar and a spring arm. The main body of the stabilizer bar is a torsion bar spring made of spring steel, shaped like a "U," and mounted transversely on the front and rear suspensions. The middle of the bar is hinged to the body or frame with a rubber bushing, and both ends are connected to the suspension guide arms via rubber pads or ball joint pins at the sidewall ends.

[0003] Most stabilizer bar assemblies installed on cars today are modular structures, meaning that the rubber bushings that connect to the car body are divided into upper and lower halves, which are fitted onto the stabilizer bar and then secured with a metal bushing. While this structure is simple to install, during long-term operation, the interference fit at the assembly point gradually wears down due to cushioning and friction. This causes the gap between the rubber bushing and the stabilizer bar to gradually widen, leading to abnormal noises. This is a problem that has remained unresolved with this type of stabilizer bar.

[0004] Publication No.: CN111409408A An integrated vulcanized lateral stabilizer bar assembly structure for new energy vehicles includes a bar body and two bushing fixing assemblies. The bushing fixing assemblies include an upper bracket, a lower bracket, an upper rolling component, a lower rolling component, an upper inner half-fixed ring, and a lower inner half-fixed ring. The two ends of the upper bracket are fixedly connected to the two ends of the lower bracket, and a circular roller track is formed between the upper bracket and the lower bracket. The inner half-fixed ring and the lower inner half-fixed ring are fastened together. The upper rolling component is located between the upper bracket and the upper inner half-fixed ring, and the lower rolling component is located between the lower bracket and the lower inner half-fixed ring. Steel wire side plates are welded to both sides of the upper and lower inner half-fixed rings. A cavity is formed between the upper inner half-fixed ring, the lower inner half-fixed ring, the lower steel wire side plate, and the upper steel wire side plate. A rubber bushing is formed in the cavity by vulcanization. However, although this technical solution improves rotational performance by incorporating rolling components, it has a complex structure, a large number of parts, and complicated welding processes. Furthermore, the rolling pairs still have the risk of wear, lubrication failure, and abnormal noise during long-term service. In addition, this solution still requires the injection and vulcanization of rubber inside the assembly, which places extremely high demands on sealing and process control.

[0005] Publication No.: CN213137491U An automatic vulcanizing machine includes a frame, characterized in that: the frame is provided with upper and lower mounting seats, the upper mounting seat is movably positioned above the lower mounting seat, the upper mounting seat has first and second upper molds distributed left and right, and the first and second upper molds are adjustable left and right, the lower mounting seat has first and second lower molds distributed left and right, and the first and second lower molds are adjustable left and right, the first upper and lower molds have matching left mold cavities, the second upper and lower molds have matching right mold cavities, the first and second lower molds are respectively provided with vulcanizing holes connecting the left and right mold cavities, the corresponding lower mounting seat has a vulcanizing pipe for placing rubber, the upper end of the vulcanizing pipe is connected to the vulcanizing hole, the lower mounting seat has a hydraulic cylinder below the lower mounting seat, the hydraulic cylinder is connected to a top block drive, the top block can be moved up and down to enter and exit the vulcanizing pipe; the first and second upper molds and the first and second lower molds are all equipped with heating structures. However, relying solely on physical coating results in low bonding strength and makes it impossible to form complex rubber contours.

[0006] Therefore, there is an urgent need for a new manufacturing technology that can achieve integrated molding of the stabilizer bar, metal frame and rubber bushing under the process conditions of single mold closing and single vulcanization, eliminate assembly gaps, improve interface bonding strength and simplify the production process. Summary of the Invention

[0007] In view of this, the present invention aims to provide an integrated vulcanization mold and vulcanization molding method for automotive stabilizer bar assembly, so as to solve the problems of assembly gaps and low production efficiency between stabilizer bar and rubber bushing.

[0008] The technical solution of this invention is implemented as follows:

[0009] One objective of this invention is to disclose an integrated vulcanization mold for an automotive stabilizer bar assembly, the stabilizer bar assembly including a stabilizer bar, a rubber bushing covering the stabilizer bar, and a metal frame, the mold including a middle template and an upper template arranged sequentially from bottom to top;

[0010] A main molding cavity space is provided between the upper template and the middle template. A movable rubber assembly is provided in the main molding cavity space. When the mold is closed, the movable rubber assembly, together with the stabilizing rod and the metal skeleton, forms an annular rubber cavity.

[0011] The mold is also provided with a skeleton positioning mechanism for positioning the metal skeleton, and a clearance structure for accommodating the U-shaped bending section of the stabilizer bar.

[0012] Optionally, the movable HAF assembly includes an upper HAF block and a lower HAF block that cooperate with each other, wherein the lower HAF block is fixed to the middle template, and the upper HAF block is pressed and positioned by the upper template; the inner sides of the upper HAF block and the lower HAF block are provided with sealing steps, and the sealing steps are pressed against the surface of the metal skeleton in the mold-closed state to form a dynamic sealing interface.

[0013] Optionally, the height of the sealing step is 0.1 to 0.2 mm higher than the surface of the metal skeleton.

[0014] Optionally, the bottom surface of the upper template is provided with a receiving groove. When the mold is closed, the receiving groove fits and presses against the upper outer edge of the upper mold block, while also providing radial limiting.

[0015] Optionally, the avoidance structure is an avoidance groove formed in the middle template; the mold also includes a stabilizer bar positioning block, which is disposed on both sides of the avoidance groove to limit the lateral displacement of the stabilizer bar body.

[0016] Optionally, the skeleton positioning mechanism includes a first pin and a second pin;

[0017] The first pin is installed inside the middle template, with its top protruding from the top surface of the middle template and engaging with the positioning hole of the metal frame;

[0018] The second pin is inserted upward from the lower template, and its top is supported by the bottom of the first pin, forming an axial load-bearing structure.

[0019] Optionally, a two-stage guidance and positioning system may also be included:

[0020] The coarse positioning mechanism includes an upper guide post and a lower guide post that penetrate the middle template, used for large stroke guidance;

[0021] The precision positioning mechanism includes a precision positioning guide post located on the upper template and a precision positioning guide sleeve located on the middle template.

[0022] Optionally, it also includes a flow channel plate, which is located above the upper template and has flow channel grooves on its bottom surface;

[0023] When the mold is closed, the flow channel groove and the top surface of the upper mold plate together form a closed flow channel.

[0024] Optionally, the main molding cavity is a multi-cavity structure, with each cavity evenly distributed along the mating surface of the middle template and the upper template, and each equipped with an independent movable hafnium assembly, a clearance structure and a skeleton positioning mechanism, and the stabilizer assembly is a rear stabilizer assembly.

[0025] Another object of the present invention discloses an integral vulcanization molding method for an automotive stabilizer bar, using an integral vulcanization mold for an automotive stabilizer bar assembly as described in any of the above claims, comprising the following steps:

[0026] S1: The stabilizer bar and the metal frame, which have undergone surface treatment and adhesive coating, are placed on the lower hafn block, and the U-shaped section of the stabilizer bar is inserted into the avoidance structure;

[0027] S2: Place the upper Huff block to complete the pre-assembly of the active Huff component;

[0028] S3: Mold closing, the upper mold plate presses the upper Happen block, so that the sealing step is pressed and sealed to the surface of the metal skeleton;

[0029] S4: Inject the rubber material into the annular rubber cavity through the injection channel, maintain the mold temperature to the preset time, and allow the rubber material to fully vulcanize and mold.

[0030] S5: After mold opening, eject the product from the movable Huff component, and separate the movable Huff component by axial expansion to obtain an integrated vulcanized stabilizer bar assembly.

[0031] Compared with the prior art, the integrated vulcanization mold and vulcanization molding method for an automotive stabilizer bar assembly of the present invention have the following advantages:

[0032] 1. This invention directly inserts the stabilizer bar metal skeleton as an insert into the mold cavity and adopts an integrated vulcanization molding process, so that the rubber bushing completes vulcanization assembly within a single mold closing cycle. This achieves a dual combination of chemical bonding and mechanical interlocking between the rubber and metal interfaces, significantly improving the overall structural strength and fatigue durability of the stabilizer bar assembly. It eliminates the micro-movement gaps and interface loosening risks present in traditional split assembly structures, effectively suppressing abnormal noises and stiffness reduction caused by bushing sway during vehicle operation, thereby greatly improving the NVH quietness, response consistency, and high-speed handling stability of the chassis system.

[0033] 2. This invention fully integrates the mold structure design with the existing standard vertical rubber injection vulcanizing machine platform, eliminating the need for expensive multi-component injection equipment, special pressing tooling, or secondary vulcanizing devices. By integrating guiding positioning, HAF limiting, and flow channel distribution into one unit, high-precision one-piece molding can be completed with just a conventional injection machine and a general hydraulic system, significantly reducing the initial investment in the production line, the complexity of equipment maintenance, and the dependence on operator skills.

[0034] 3. This invention completely integrates the rubber bushing molding and metal skeleton assembly processes into a single vulcanization cycle, eliminating redundant processes such as rubber pre-vulcanization, semi-bushing assembly, sheath pressing, adhesive coating, and rework in traditional processes. Combined with modular quick-change, multi-cavity parallel layout, and auxiliary demolding system, production efficiency is increased by more than 30%, labor costs are reduced, and the first-pass yield is improved by eliminating assembly errors and interface defects, resulting in a significant reduction in overall manufacturing costs. Attached Figure Description

[0035] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1 This is a perspective view of the integrated vulcanization mold for the stabilizer bar of the present invention;

[0037] Figure 2 This is an exploded view of the integrated vulcanization mold for the stabilizer bar of the present invention;

[0038] Figure 3 This is a top view of the integrated vulcanization mold for the stabilizer bar of the present invention;

[0039] Figure 4 This is a cross-sectional view (AA) of the integrated vulcanization mold for the stabilizer bar of the present invention.

[0040] Figure 5 This is a BB cross-sectional view of the integrated vulcanization mold for the stabilizer bar of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the first type of active HAF component of the present invention;

[0042] Figure 7 This is a partial enlarged view (A) of the first type of active HAF assembly of the present invention;

[0043] Figure 8 This is a schematic diagram of the explosion of the first type of active HAF component of the present invention;

[0044] Figure 9 This is a partial enlarged view (B) of the first type of active HAF component of the present invention;

[0045] Figure 10 This is a top view of the first type of active HAF component of the present invention;

[0046] Figure 11 This is a CC cross-sectional view of the first type of active HAF assembly of the present invention;

[0047] Figure 12 This is a DD cross-sectional view of the first type of active HAF assembly of the present invention;

[0048] Figure 13 This is a schematic diagram of the structure of the second type of active HAF component of the present invention;

[0049] Figure 14 This is a schematic diagram of the explosion of the second type of active HAF component of the present invention;

[0050] Figure 15 This is a top view of the second type of active HAF component of the present invention;

[0051] Figure 16 This is an FF cross-sectional view of the second type of active HAF assembly of the present invention;

[0052] Figure 17 This is a GG cross-sectional view of the second type of active HAF component of the present invention;

[0053] Figure 18 This is a schematic diagram of the template structure in this invention;

[0054] Figure 19 This is a top view of the template in this invention;

[0055] Figure 20 This is a schematic diagram of the template structure of the present invention;

[0056] Figure 21 This is a bottom view of the template of this invention;

[0057] Figure 22 This is an EE cross-sectional view of the template in this invention;

[0058] Figure 23 This is a schematic diagram of the structure of the template of the present invention;

[0059] Figure 24 This is a top view of the template of the present invention;

[0060] Figure 25 This is a schematic diagram of the flow channel plate of the present invention;

[0061] Figure 26 This is a bottom view of the flow channel plate of the present invention;

[0062] Figure 27 This is a perspective view of the demolding tooling of the present invention.

[0063] Figure 28 This is a diagram of the rear stabilizer bar assembly;

[0064] Figure 29 This is a schematic diagram of the upper left skeletal structure;

[0065] Figure 30 This is a schematic diagram of the lower left skeletal structure;

[0066] Figure 31 This is a schematic diagram of the upper right skeleton structure;

[0067] Figure 32 This is a schematic diagram of the lower right skeleton structure;

[0068] Figure 33 This is a schematic diagram of the rubber bushing structure on the left.

[0069] Figure 34 This is a schematic diagram of the rubber bushing structure on the right side;

[0070] Figure 35 This is a schematic diagram of the stabilizer bar structure;

[0071] Figure 36 The process of placing the frame for actual production;

[0072] Figure 37 The frame has been installed and the mold is about to be closed for actual production.

[0073] Figure 38 After actual production is completed, the product and the active hafur are placed together on the auxiliary tooling.

[0074] Explanation of reference numerals in the attached figures

[0075] 1. Lower template; 2. Middle template; 201. Positioning groove; 202. Clearance groove; 3. Upper template; 301. Receiving groove; 4. Runner plate; 5. Precision positioning guide post; 6. Precision positioning guide sleeve; 7. Movable runner assembly; 701. Sealing step; 702. Upper runner block; 703. Lower runner block; 704. Transverse runner; 705. Transverse runner outlet; 8. Positioning ring; 9. Nozzle end cap; 10. Upper guide post; 11. Lower guide post; 12. Skeleton positioning pin; 1201. First pin; 1202. Second pin; 13. Stabilizer positioning block; 14. Main gate; 15. Runner groove; 16. Sub-runner; 17. Injection hole; 18. Limiting post; 19. Runner support structure; 20. L-shaped push-pull rod; 21. Drive cylinder; 22. Stabilizer bar; 23. Rubber bushing; 24. Metal skeleton. Detailed Implementation

[0076] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0077] like Figures 1 to 38 As shown, before describing the present invention, it is necessary to explain the typical manufacturing and assembly processes of current automotive stabilizer bar assemblies in order to more clearly understand the technical problems solved by the present invention and the substantial progress it brings.

[0078] Currently, the stabilizer bar assemblies widely used in mass-produced vehicles generally employ a split assembly structure for the rubber bushings 23 that connect to the vehicle body or subframe. Specifically, this structure consists of three parts: the U-shaped stabilizer bar 22 body (usually made of spring steel), the upper and lower halves of the rubber bushing 23, and the integral metal frame 24 (also called a clamp or outer ring). It should be noted that the automotive stabilizer bar assembly refers to the lateral stabilizing device in the front and rear suspensions of a vehicle used to suppress body roll, including the front and rear stabilizer bar assemblies. Although there are differences in stiffness design and installation interfaces, both face common technical problems such as bushing noise, interface delamination, and low assembly efficiency. Therefore, the integrated vulcanization solution developed for the rear stabilizer bar can be directly applied to the front stabilizer bar field. Its manufacturing and assembly process is as follows:

[0079] First, after the rubber material (such as NR, EPDM, etc.) is mixed, it is pre-formed into two symmetrical semi-cylindrical rubber parts, namely the upper bushing and the lower bushing, in a mold through compression molding or injection vulcanization. This process is an independent step. The rubber bushing 23 completes one vulcanization without the metal skeleton 24, and its inner diameter is slightly smaller than the outer diameter of the stabilizer bar 22, while its outer diameter matches the inner hole of the metal sheath. Subsequently, at the assembly station, the operator or semi-automatic equipment completes the following steps in sequence:

[0080] The lower rubber bushing is placed in the bracket positioning groove 201; the end of the stabilizer bar 22 is inserted into the inner hole of the lower bushing; the upper rubber bushing 23 is fastened to the top of the bar, aligning with the lower bushing along the parting surface to form a complete annular wrap around the bar; finally, the metal frame 24 (often preheated to reduce assembly force) is forcefully pressed onto the outer periphery of the rubber assembly using a hydraulic press, achieving a tight fit between the three components. Some designs also apply adhesive to the interface between the rubber bushing 23 and the metal frame 24, or knurling is applied to the inner wall of the metal frame 24 to enhance mechanical engagement.

[0081] Although the assembly method is technologically mature and has low equipment requirements, it has inherent defects: there is a parting gap at the joint of the upper and lower rubber bushings 23, and it is difficult to achieve a seamless fit between the rubber bushings 23 and the body of the stabilizer bar 23; during long-term service, the gap will expand due to fretting wear, which can easily cause abnormal noise; and the interface has no chemical bonding and only relies on mechanical interference, which limits its durability.

[0082] In response to the problems of structural loosening, frequent abnormal noises, and low efficiency caused by the multi-step assembly mode of separate vulcanization, manual assembly, and interference fit, this invention proposes a brand-new integrated vulcanization technology solution: through mold structure design, the metal body of the stabilizer bar 22 is directly placed into the mold cavity as an insert, and the rubber bushing 23 is formed within a single mold closing vulcanization cycle, completely eliminating redundant processes such as rubber pre-vulcanization, split assembly, and bushing press fit, fundamentally eliminating assembly gaps, and realizing the integrated manufacturing of a highly reliable and quiet stabilizer bar assembly.

[0083] The following describes in detail the mold structure, working principle, process flow and technical effects of the present invention with reference to several embodiments.

[0084] Example 1

[0085] The mold in this embodiment includes a lower mold plate 1, a middle mold plate 2, and an upper mold plate 3 arranged sequentially from bottom to top. The mold plates are initially connected by mold frame bolts and installed on a standard vertical rubber injection vulcanizing machine. The lower mold plate 1 is fixed to the lower worktable of the press; the middle mold plate 2 is connected to the lower lifter of the press and can move downwards or upwards with it; the upper mold plate 3 is connected to the upper lifter of the press and is used to perform the mold closing and clamping action. To ensure smooth movement and precise alignment of the mold plates during mold closing, the mold is equipped with a guiding and positioning system to guide the mold plates along a predetermined trajectory and achieve high-precision closure. This guiding and positioning system can be configured as a single-stage or multi-stage structure according to accuracy requirements, including a long guide post mechanism for large-stroke coarse guidance and / or a high-precision guide post and guide sleeve pair for final fine positioning. The specific structure will be described in detail below.

[0086] With the help of the aforementioned guiding and positioning system, each template of the mold can close stably, thus providing a reliable assembly basis for the internal molding components.

[0087] Specifically, two closed main molding cavities are formed between the upper mold plate 3 and the middle mold plate 2, and the movable Huff assembly 7 is housed inside these cavities. The movable Huff assembly 7 includes an upper Huff block 702 and a lower Huff block 703, which together form an annular rubber cavity surrounding the stabilizer bar 22 and the metal skeleton 24 when the mold is closed. This cavity is used to achieve vulcanization molding of the U-shaped stabilizer bar 22, the rubber bushing 23, and the metal skeleton 24 during a single mold closing process, and to precisely mold the complex geometric features of the rubber bushing 23. The side of the upper Huff block 702 and the lower Huff block 703 facing the annular rubber cavity is the inner side, and the opposite side is the outer side.

[0088] The movable Huff block assembly includes a pair of symmetrically arranged upper Huff block 702 and lower Huff block 703. The lower Huff block 703 is installed in a positioning groove 201 on the top of the middle mold plate 2, its position is fixed, and it supports the metal frame 24 of the stabilizing rod 22. The upper Huff block 702 is placed directly on the upper surface of the lower Huff block 703, covering the upper half of the metal frame 24 of the stabilizing rod 22. The bottom surface of the upper mold plate 3 has an upwardly recessed receiving groove 301, the contour of which matches the shape of the upper Huff block 702. During mold closing, the upper mold plate 3 moves downward, and the receiving groove 301 at its bottom fits and wraps around the upper outer edge of the upper Huff block 702, applying a vertical clamping force while providing radial limiting, ensuring that the upper Huff block 702 and lower Huff block 703 are precisely aligned and their end faces are tightly fitted, achieving circumferential closure. This design retains the ease of operation for manual or automatic placement of the HAF block, while the receiving groove 301 at the bottom of the upper template 3 effectively prevents the upper HAF block 702 from shifting laterally or warping under injection pressure, significantly improving the reliability of cavity sealing.

[0089] Preferably, the mating end faces between the upper Huff block 702 and the lower Huff block 703 are provided with mutually cooperating concave-convex positioning structures. For example, the bottom surface of the upper Huff block 702 is provided with at least one positioning boss, and the top surface of the lower Huff block 703 is provided with a corresponding matching positioning groove; or vice versa. The concave-convex structures automatically engage during mold closing, effectively limiting the relative sliding or rotation of the upper Huff block 702 and the lower Huff block 703 in the horizontal plane, ensuring their alignment accuracy.

[0090] To accommodate the geometric features of the U-shaped stabilizer bar 22, the middle template 2 is provided with a relief groove 202 to accommodate the bent section of the stabilizer bar 22; at the same time, the mold also includes stabilizer bar positioning blocks 13, located on both sides of the relief groove 202, to limit the lateral displacement of the bar.

[0091] To ensure the metal frame 24 of the stabilizer bar 22 maintains precise position during mold closing and glue injection, the mold is equipped with a frame positioning pin 12 for axial limiting and circumferential orientation. The frame positioning pin 12 includes a first pin 1201 and a second pin 1202, which are stacked axially and pass through the middle template 2 and the lower template 1.

[0092] The specific structure is as follows: A stepped hole is provided on the middle template 2, which includes an upper large-diameter section and a lower small-diameter section; the first pin 1201 is installed in the stepped hole, with its top protruding from the top surface of the middle template 2 and engaging with the positioning hole on the bottom surface of the metal frame 24 of the stabilizer 22 to achieve circumferential angle constraint and axial initial positioning; the bottom of the first pin 1201 protrudes downward from the bottom surface of the middle template 2 and is provided with an axial blind hole; the top surface of the lower template 1 is provided with a groove at a corresponding position to accommodate the protruding bottom of the first pin 1201 and avoid interference; the second pin 1202 is inserted upward from the bottom of the lower template 1, passes through the lower template 1, and its top extends into the groove and abuts against the blind hole at the bottom of the first pin 1201 to form a stable axial support. This design allows the first pin 1201 to be replaced as a consumable part without disassembling the entire template; the injection and mold closing loads are transferred to the second pin 1202 through the first pin 1201, and then borne by the lower template 1, avoiding excessive local stress on the middle template 2; the fit between the blind hole and the top of the second pin 1202 can absorb manufacturing errors and ensure the uniformity of the top surface height of the first pin 1201.

[0093] Before mold closing, the metal frame 24 of the stabilizer bar 22 is placed on the lower hafn block 703, and its positioning hole automatically fits into the top of the first pin 1201. During the mold closing process, the upper template 3 presses the upper hafn block 702, while the metal frame 24 is firmly fixed by the composite positioning system composed of the first pin 1201 and the second pin 1202 to prevent displacement due to impact of the rubber material or thermal expansion.

[0094] In addition, the inner sides of the upper Happen block 702 and the lower Happen block 703 are provided with sealing steps 701, the height of which is 0.1 to 0.2 mm higher than the surface of the metal skeleton 24. After the mold is closed and pressed, the sealing steps 701 press against the metal surface, forming a dynamic sealing interface under injection pressure, effectively preventing the rubber material from overflowing from the metal-rubber gap, ensuring that the product has no flash and uniform wall thickness.

[0095] The injection runner system is integrated inside the upper mold plate 3, including a main gate 14, a Y-shaped runner 16, and two symmetrically arranged injection holes 17. The injection holes 17 are located on the top surface of the upper Huff block 702 and extend vertically downwards, penetrating to the mating end face of the upper Huff block 702 and the lower Huff block 703; subsequently, the injection holes 17 are connected to the central region of the annular rubber cavity through a transverse runner 704 located inside the Huff block.

[0096] The two injection holes 17 are arranged symmetrically with the axis of the movable HAF component 7 as the axis of symmetry, so that the low hardness EPDM material is filled synchronously in both directions along the axial direction from the middle of the cavity, which effectively shortens the flow path, reduces pressure loss, and avoids uneven wall thickness or weld line defects caused by unilateral injection.

[0097] Preferably, the upper Happo block 702 and the lower Happo block 703 are provided with two sets of transverse flow channels 704, which are respectively connected to the injection hole 17; the transverse flow channel outlets 705 of the two sets of transverse flow channels 704 are located on the mating end faces of the upper Happo block 702 and the lower Happo block 703. The mating end faces of the upper Happo block 702 and the lower Happo block 703, i.e., the parting surface, are not horizontal planes. The two transverse flow channel outlets 705 are respectively located in two areas with different spatial positions: one outlet is located at a relatively high part of the parting surface, corresponding to the upper side of the straight section of the stabilizer 22; the other outlet is located at a relatively low part of the parting surface, corresponding to the lower side of the straight section. This arrangement, while ensuring the feasibility of flow channel processing, achieves efficient and balanced filling of the rubber material in the complex curved cavity, and avoids Happo block interference or sealing failure caused by forcibly setting the parting surface to be horizontal.

[0098] Although the two crossflow outlets 705 are at different heights, they are both located on their respective mating faces to ensure that the rubber material is directly injected into the annular rubber cavity from the parting surface. Thus, after entering through the same injection hole 17, the rubber material is injected into the annular rubber cavity from two different height positions through the two crossflow outlets 705.

[0099] Preferably, the injection channel system adopts an upper and lower opposing layout, with an injection hole 17 opened on the top surface of the upper Huff block 702, connecting to a transverse channel 704, the transverse channel 704 extending inward to the cavity, and the transverse channel outlet 705 located at the end of the transverse channel 704.

[0100] Another injection hole 17 is opened on the bottom surface of the lower hafnium block 703 and connects to the transverse flow channel 704. The transverse flow channel 704 extends inward to the cavity, and the transverse flow channel outlet 705 is located at the end of the transverse flow channel 704.

[0101] The two sets of flow channels are arranged symmetrically around the axis of the rubber cavity, and the rubber material flows simultaneously from both the top and bottom ends into the center of the cavity. This design is suitable for equipment configurations that require extremely high filling symmetry and allow for flow channels in the lower mold, and can further eliminate axial flow imbalance.

[0102] The integrated vulcanized stabilizer bar assembly produced by the mold in this embodiment exhibits improved peel strength at the rubber-metal interface, and the product is free of flash, bubbles, and missing adhesive. No abnormal noises were observed during vehicle bench durability and NVH testing, demonstrating significantly superior performance compared to traditional assembled structures. It eliminates assembly gaps and achieves high reliability, high quietness, and high consistency. This invention provides an integrated vulcanized automotive stabilizer bar assembly and its mold system, which is independent of specific installation positions. Through modular Huff components 7 and flow channel design, it can adapt to different geometric profiles and performance requirements of front and rear stabilizer bars, enabling platform-based manufacturing. This embodiment uses a typical automotive stabilizer bar assembly as an example. The stabilizer bar assembly includes a stabilizer bar 22, a U-shaped metal frame 24, and an integrated vulcanized rubber bushing 23. Its specific length, bending radius, and cross-sectional dimensions can be set according to the vehicle platform requirements. The mold of this invention adapts to different geometric profiles through replaceable movable Huff components 7, and the injection flow channel layout can also be adjusted accordingly, thus making it suitable for the production of front or rear axle stabilizer bars.

[0103] Example 2

[0104] Unlike Embodiment 1, the mold in this embodiment may also include a runner plate 4 as a preferred integrated component of the injection feeding system.

[0105] The runner plate 4 is an independent plate-shaped structure, fixedly installed on the upper end of the injection press head, directly above the upper mold plate 3. To ensure precise alignment of the runner system with the cavity during mold closing, the upper guide post 10 extends upward from the top of the upper mold plate 3 and penetrates the runner plate 4. Its top end is limited above the runner plate 4 by a nut or retaining ring. A through hole is provided at a corresponding position on the runner plate 4, with a diameter slightly larger than the outer diameter of the upper guide post 10 to allow for thermal expansion clearance while ensuring coaxiality. This design allows the runner plate 4 to move synchronously with the upper mold plate 3 under the drive of the press, avoiding runner misalignment or shear leakage caused by relative displacement.

[0106] The runner plate 4 has a main gate 14 inside for connecting to an external rubber injection molding machine. A positioning ring 8 is provided on the outer periphery of the main gate 14 for contacting and sealing the nozzle end face of the external rubber injection molding machine to ensure no leakage during injection. A nozzle plug 9 is detachably installed inside the main gate 14 to block non-working runners during trial molding, single-cavity production, or multi-cavity switching, maintaining system pressure balance and preventing material overflow. Extending downwards from the main gate 14, the bottom surface of the runner plate 4 is machined with an open slot-shaped runner groove 15, the cross-section of which can be semi-circular, U-shaped, or rectangular.

[0107] When the runner plate 4 and the upper mold plate 3 are closed and fitted together, the runner groove 15 and the top surface of the upper mold plate 3 together form a closed runner 16. The runner 16 is preferably a Y-shaped or multi-level star-shaped branch structure, which branches evenly from the central main channel to both sides or circumferentially, and finally connects to the rubber cavity below through the injection hole 17 provided in the upper mold plate 3.

[0108] Furthermore, the surface where the flow channel plate 4 and the upper template 3 meet is provided with an annular sealing groove, which is embedded with a high-temperature resistant fluororubber sealing ring to ensure that there is no leakage of adhesive material under injection pressure.

[0109] This embodiment uses an independent runner plate 4 and a closed runner formed by the precise fit between the runner plate 4 and the upper template 3. This avoids the sticky glue or uneven shearing caused by processing errors in traditional blind hole runners. After the mold is opened, the runner is exposed on the surface, and residual glue can be quickly removed, improving maintenance efficiency. This makes the runner function modular. The runner plate 4 can be manufactured separately using easy-to-process materials. When the product is worn or changed, only the runner plate 4 needs to be replaced, without scrapping the expensive upper template 3.

[0110] Furthermore, by optimizing the branch layout, balanced filling of long-axis or large-circumference cavities can be achieved, reducing flow imbalance defects. Therefore, it is significantly superior to the built-in flow channel solution.

[0111] Example 3

[0112] Based on Example 1, in order to ensure the smoothness of movement and the final alignment accuracy during the mold closing process, the mold is equipped with a two-stage guiding and positioning system, including a coarse positioning mechanism for guiding large strokes and a fine positioning mechanism for final precise positioning.

[0113] The coarse positioning mechanism includes a lower guide post 11 and an upper guide post 10.

[0114] The lower template 1, the middle template 2, and the upper template 3 are respectively provided with corresponding guide holes along the same axis; the lower guide post 11 is inserted upward from the guide hole at the bottom of the lower template 1 and passes through the corresponding guide hole of the middle template 2; the upper guide post 10 is inserted downward from the guide hole at the top of the upper template 3 and also passes through the corresponding guide hole of the middle template 2; the lower guide post 11 and the upper guide post 10 are arranged opposite to each other inside the middle template 2 but do not contact each other, and an axial gap is reserved between their ends, preferably 1 to 3 mm, to avoid rigid interference caused by thermal expansion or manufacturing errors;

[0115] The exposed ends of the two guide pillars, i.e. the ends away from the middle template 2, are equipped with snap-fit ​​parts, such as one or more steps, threaded sections or pin holes, to limit and fix them with the template body and prevent the guide pillars from coming out during the mold opening and closing process; the inner ends of the two guide pillars, i.e. the ends facing the middle template 2, are tapered guide heads, which facilitate automatic insertion into the corresponding guide holes in the early stage of mold closing, so as to achieve rapid centering and compensate for minor assembly deviations.

[0116] The coarse positioning mechanism effectively guides the middle template 2 to move smoothly upward in the vertical direction during the initial stage of mold closing, significantly suppressing swaying and deflection during large stroke movements, and laying the geometric foundation for subsequent fine positioning;

[0117] Based on the initial alignment achieved through coarse positioning, the mold is further equipped with a fine positioning mechanism to achieve high-precision alignment at the final mold closing stage, ensuring the sealing integrity of the rubber cavity and the consistency of product dimensions. The fine positioning mechanism includes fine positioning guide posts 5 and fine positioning guide sleeves 6, which form a sliding pair with high fitting precision. Their connection structure is described below according to the mold plate level:

[0118] Upper template 3 side structure: On the bottom surface of the upper template 3, several precision positioning guide posts 5 are evenly arranged circumferentially, preferably four. Each precision positioning guide post 5 extends vertically downward, and its outer cylindrical surface is ground or polished, with a surface roughness Ra ≤ 0.4μm and a diameter tolerance grade not lower than h6, to ensure guiding accuracy and wear resistance.

[0119] Side structure of the middle template 2: Several mounting holes, preferably four, are provided on the top surface of the middle template 2 at corresponding positions, coaxial with the precision positioning guide post 5; a precision positioning guide sleeve 6 is press-fitted or threaded onto the upper part of each mounting hole. The precision positioning guide sleeve 6 is made of high-hardness alloy steel or self-lubricating composite material, with an inner hole tolerance grade of not less than H7, forming a precision sliding fit with the precision positioning guide post 5, and the single-sided fit clearance is controlled within 0.008 to 0.015 mm.

[0120] When the upper mold plate 3 descends to the final mold closing position, the precision positioning guide post 5 is inserted into the precision positioning guide sleeve 6. Through high-precision cylindrical surface mating, the relative positional error between the upper mold plate 3 and the middle mold plate 2 is strictly limited to within ±0.02 mm. This precision is sufficient to ensure that the mating surfaces of the movable HAF block fit tightly and that the sealing step 701 effectively presses against the metal skeleton 24, thereby preventing the glue from overflowing and ensuring the uniformity of the wall thickness of the rubber bushing 23.

[0121] Example 4

[0122] Based on Example 1, in order to meet the demand of new energy vehicle platforms for large-volume and high-consistency supply of stabilizer bars 22 and rubber bushings 23, this example designs the mold as a multi-cavity parallel structure, which significantly improves the output efficiency of a single mold per batch.

[0123] Specifically, the mold has several main forming cavities, preferably 2, 4, 6, 8, 10, or 12 cavities, which are evenly distributed in multiple rows or a ring along the mating surface of the middle mold plate 2 and the upper mold plate 3. Each main forming cavity includes an independent set of movable HAF components 7, clearance grooves 202, skeleton positioning pins 12, and stabilizing rod positioning blocks 13. The cavities are physically isolated from each other by reinforcing ribs or partitions, so that they do not interfere with each other and the forming process is independently controllable.

[0124] In a multi-cavity mold, the movable rubber assembly 7 consists of multiple independent units, the number of which corresponds one-to-one with the number of main molding cavities. Each movable rubber assembly 7 includes an upper rubber block 702 and a lower rubber block 703 that cooperate with each other, which are used to cover the upper and lower halves of the corresponding stabilizing rod 22 and metal skeleton 24, respectively, to form an independent annular rubber cavity.

[0125] Each set of movable HAF components 7 is distributed horizontally, vertically, or in multiple rows along the mating surface of the middle template 2 and the upper template 3, and is physically isolated from each other by partitions or positioning platforms on the templates to ensure that they do not interfere with each other during mold closing, glue injection, and vulcanization. Each set of HAF components can be installed, replaced, or maintained independently, or can be demolded as a whole simultaneously.

[0126] This design allows multiple stabilizer bars 22, rubber bushings 23, and metal skeletons 24 to be vulcanized simultaneously within a single mold closing cycle, significantly improving production efficiency. At the same time, due to the consistent structure and balanced stress of each cavity, the product dimensions and performance are highly consistent, meeting the quality requirements of OEMs for large-volume supply.

[0127] To accommodate multi-cavity layouts, the injection runner system has been optimized through mold flow analysis, employing a balanced multi-stage flow distribution structure. The runner channels 16 within the runner plate 4 or upper mold plate 3 exhibit a symmetrical Y-shaped, H-shaped, or star-shaped topology, with each branch having strictly consistent length, cross-sectional area, and corner curvature to ensure synchronous delivery of the molding compound to each cavity. This design reduces filling time differences and cavity pressure fluctuations, effectively preventing wall thickness variations or short-fill defects caused by flow imbalances.

[0128] Furthermore, to ensure the uniformity of vulcanization in multi-cavity products, the lower mold 1 integrates zoned heat-conducting oil channels, with each cavity corresponding to an independent temperature control circuit, allowing for individual temperature adjustment to compensate for the difference in heat loss between the edge cavities and the center cavity.

[0129] Meanwhile, all cavities share the same two-stage guiding and positioning system, including upper guide post 10, lower guide post 11, precision positioning guide post 5 and precision positioning guide sleeve 6, to ensure that all cavities reach the alignment accuracy synchronously when the mold is closed.

[0130] This embodiment can produce multiple integrated vulcanized stabilizer bar assemblies, improving production efficiency and ensuring consistent quality across large batches of products.

[0131] Example 5

[0132] Based on Example 1, considering that the Huff block in the active Huff assembly 7 is a vulnerable part, this example adopts a modular quick-change design for its structure to improve maintenance efficiency and overall equipment efficiency.

[0133] Specifically, the lower hafu block 703 can slide within the positioning groove 201 on the top of the middle template 2 via a dovetail groove or T-key, achieving axial limiting and radial guidance. The side wall of the positioning groove 201 is provided with a corresponding dovetail guide rail or T-slot, and the bottom of the lower hafu block 703 is machined with a matching reverse structure. During installation, the lower hafu block 703 can be directly pushed into the positioning groove 201 along the direction of the slide. To improve the stability of the lower hafu block 703, it can be connected to the middle template 2 via screws. During disassembly, only two locking screws need to be loosened to pull the lower hafu block 703 out as a whole, without disassembling the template or using special tools.

[0134] The lower hafn 703 and the middle template 2 can also be temporarily fixed by a pressure plate or elastic clips, which facilitates quick placement before mold closing and automatic removal after mold closing. Alternatively, the lower hafn 703 can be placed in the positioning groove 201 of the middle template 2 without a fixing structure.

[0135] To improve wear resistance and service life, the working surface of the HAF block, namely the inner surface that contacts the rubber bushing 23 and the metal skeleton 24, is made of H13 hot work die steel.

[0136] Production line verification shows that adopting this modular design reduces the time required for a single HAF block replacement, thus improving production efficiency.

[0137] Example 6

[0138] Based on Example 1, this example addresses the problems that easily occur during the vulcanization process of thick-walled stabilizer bars 22 and rubber bushings 23 with a rubber thickness ≥ 8 mm, such as insufficient vulcanization of the inner layer, excessive vulcanization of the outer layer, residual bubbles, and internal stress concentration. It optimizes the thermal management and exhaust system to ensure that the vulcanization of thick-walled products is uniform, dense, and without defects.

[0139] Specifically, a heat-conducting oil channel is embedded inside the lower mold plate 1. This channel is approximately 20 mm from the bottom surface of the rubber cavity and is distributed in a ring or contour along the outline of the lower mold block 703, ensuring that heat is evenly transferred to the entire molding area. For easy connection to external temperature control equipment, a lower pad is provided at the bottom of the mold, with pre-drilled quick-connect fitting holes on its sidewalls for rapid connection to the inlet and outlet oil pipes of the mold temperature controller. Through a closed-loop temperature control system, the mold's operating temperature can be precisely adjusted within the range of 150℃ to 180℃, with a temperature control accuracy of ±2℃, effectively eliminating the vulcanization gradient caused by the lag in heat conduction in thick-walled rubber materials.

[0140] Meanwhile, to address the issue of gas venting during thick-walled filling, a self-sealing venting groove is provided on the upper surface of the lower mold plate 1, near the end of the rubber cavity. This venting groove is 0.1 mm deep and 2 mm wide, distributed radially or spirally, and connects to the outer edge of the mold. When the low-viscosity EPDM rubber flows forward under injection pressure, air in the cavity is smoothly expelled along the venting groove. When the leading edge of the rubber reaches the end of the venting groove, the rubber rapidly fills the micro-gaps under pressure and cools and solidifies, achieving automatic sealing. This ensures sufficient venting and prevents rubber overflow and flash formation.

[0141] Under the same process conditions, the thick-walled bushing with the structure of this embodiment has no air bubbles or undersulfurized areas inside, has small Shore A hardness dispersion, and maintains a high and stable peel strength.

[0142] Example 7

[0143] The specific usage method of this mold is as follows:

[0144] Step 1, Pre-treatment and installation of metal frame 24: The stabilizer bar 22 and metal frame 24 are sandblasted and coated with rubber-metal adhesive, such as Chemlok 205 / 252. After drying, they are placed on the lower hafn block 703. Its U-shaped curved section naturally falls into the clearance groove 202 opened in the middle of the middle template 2 to ensure that the axis of the bar is aligned with the center of the mold.

[0145] Step 2, place the 702 block of urea in the upper part of the container:

[0146] The upper Hf block 702 is manually or automatically placed on top of the lower Hf block 703 by a robotic arm, so that it initially wraps around the upper half of the metal frame 24, completing the pre-assembly of the Hf component.

[0147] Step 3, Mold closing and clamping:

[0148] When the press is started, the upper template 3 moves downward, and the receiving groove 301 at its bottom fits and presses the top of the upper humidor block 702, pushing the upper and lower humidor blocks 703 to achieve end-to-end contact and circumferential closure, forming a sealed annular rubber cavity; at the same time, the skeleton positioning pin 12 assembly ensures that the metal skeleton 24 maintains a precise position during the mold closing process.

[0149] Step 4, Injection and Vulcanization:

[0150] The external rubber injection machine injects low-hardness EPDM rubber into the rubber cavity through the flow channel 16 formed by the flow channel plate 4 and the upper template 3.

[0151] The vulcanization process parameters are set as follows: mold temperature 165℃, injection pressure 12 MPa, holding time 30 seconds, and vulcanization time 5 minutes.

[0152] Step 5, Mold Opening and Demolding:

[0153] After vulcanization is completed, the upper mold 3 moves upward to detach the product; then, the ejection mechanism moves to eject the lower hafnium block 703 along with the vulcanized finished product from the middle mold 2.

[0154] Step six: Using a hydraulic expansion demolding tool, the upper HAF block 702 and the lower HAF block 703 are simultaneously peeled off radially to obtain an integrally vulcanized stabilizer bar assembly.

[0155] To ensure consistency and traceability in mass production, this invention establishes a seven-step standardized operating procedure:

[0156] S1: Frame cleaning and adhesive drying;

[0157] Clean and sandblast the stabilizer bar 22 and metal frame 24, apply a rubber-metal adhesive such as Chemlok 205 / 252, and dry at 120°C for 10 minutes to ensure the adhesive is fully cured.

[0158] S2: Installation of the Huff block and positioning of the skeleton;

[0159] Install the lower hafu block 703 into the positioning groove 201 of the middle template 2, ensuring that it is aligned with the center of the mold; place the prepared metal skeleton 24 on the lower hafu block 703, with the U-shaped bent section inserted into the clearance groove 202; install the upper hafu block 702, covering the upper half of the metal skeleton 24, ensuring that the concentricity of the upper and lower hafu blocks 703 with the skeleton is ≤0.05 mm.

[0160] S3: Mold closing;

[0161] Start the press, and the upper template 3 moves downward. It is guided by the upper guide post 10 and the lower guide post 11 for a large stroke. Then, the precision positioning post 5 and the precision positioning sleeve 6 achieve high-precision alignment to ensure that the relative position error between the upper template 3 and the lower template 1 is ≤ ±0.02 mm.

[0162] S4: Injection;

[0163] The injection molding machine injects low-hardness EPDM rubber into the rubber cavity at a pressure of 10–15 MPa through the runner 16 formed by the runner plate 4 and the upper template 3, and maintains the pressure for 20 seconds to ensure that the rubber is filled evenly and without air bubbles.

[0164] S5: Vulcanization;

[0165] Vulcanization is carried out at a mold temperature of 165℃ for 300 seconds to ensure that the rubber bushing 23 is fully vulcanized and achieves the designed hardness and physical properties.

[0166] S6: Demolding and separation from Happo;

[0167] After vulcanization, the upper mold 3 moves upward to detach from the product; the ejection mechanism moves to eject the lower HAFU block 703 along with the vulcanized finished product from the middle mold 2; a hydraulic expansion demolding tool is used to simultaneously peel off the upper HAFU block 702 and the lower HAFU block 703 radially to obtain an integrally vulcanized stabilizer assembly.

[0168] S7: Online detection;

[0169] Each batch of products undergoes online testing to ensure improved peel strength and a surface free of defects such as burrs and bubbles. Non-conforming products automatically trigger a traceability system, linking the rubber batch, mold status, and process parameters to ensure traceability of quality issues.

[0170] Example 8

[0171] Based on Example 1, in order to achieve rapid and non-destructive separation of the halogenated block and the vulcanized product, this example is further equipped with an auxiliary demolding system.

[0172] Specifically, after the mold closing and vulcanization are completed, the upper mold plate 3 moves upward to open the mold, and the ejection mechanism ejects the middle mold plate 2, along with the lower humidor block 703, the upper humidor block 702, and the integrated vulcanization stabilizing rod assembly, out of the mold as a whole. Subsequently, the assembly is transferred to a special auxiliary demolding fixture for humidor stripping.

[0173] The auxiliary demolding fixtures include:

[0174] Limiting posts 18: There are two or four of them, which are vertically arranged and have a positioning head at the top. They are used to insert into and abut against the groove or stepped surface on the metal frame 24 of the stabilizer bar assembly, thereby fixing the axial position of the metal frame 24.

[0175] Hafu support structure 19: Located between or outside the two limiting posts 18, it is used to support the bottom or outer edge of the movable hafu component 7 and keep it stable during demolding.

[0176] L-shaped push-pull rod 20: Two sets are provided, symmetrically arranged on one or both sides of the stabilizer rod 22; the vertical section of each L-shaped push-pull rod 20 is inserted from above into the gap between two oppositely arranged movable haptic components 7, and the horizontal section extends outward;

[0177] Drive cylinder 21: Connected to the horizontal end of the L-shaped push-pull rod 20, used to provide a horizontal outward pulling force. The drive cylinder 21 can be two symmetrically arranged, or a single cylinder can be used in conjunction with an extended crossbeam to drive the push-pull rods 20 on both sides to move synchronously;

[0178] Base: Used to integrate the above components, facilitating overall installation on automated production lines.

[0179] During demolding, the drive cylinder 21 operates synchronously, causing the L-shaped push-pull rod 20 to move horizontally outward. Because the vertical section of the L-shaped push-pull rod 20 engages in the inner gap of the Huff block, its movement applies an axial expansion force to the upper Huff block 702 and the lower Huff block 703, forcing them to open synchronously along the axial direction of the stabilizer rod 22 and the metal frame 24, thus detaching from the rubber bushing 23. Simultaneously, the metal frame 24 is firmly fixed by the limiting post 18, and the movable Huff assembly 7 is supported by the support structure 23, ensuring a smooth, impact-free, and damage-free demolding process.

[0180] Verification has shown that using this auxiliary demolding system shortens the time for single HAF peeling, leaves no scratches or deformation on the product surface, and extends the lifespan of the HAF block, making it fully suitable for integration into automated production lines.

[0181] Furthermore, the present invention also provides an automotive stabilizer bar assembly, which is integrally vulcanized using the aforementioned mold and process. This assembly includes a U-shaped stabilizer bar 22, a metal frame 24, and a rubber bushing 23 between them. The two components achieve chemical bonding and mechanical fitting during a single vulcanization process. The rubber bushing 23 has no parting surface or seam, and there is no assembly gap between it and the metal frame 24, completely eliminating the sources of abnormal noise caused by interface micro-movement, interference fit loosening, or bonding failure in traditional split structures.

[0182] Through vehicle bench durability testing and NVH testing, the integrated vulcanized stabilizer bar assembly demonstrated no perceptible abnormal noises under simulated extreme conditions, such as high-frequency bumps and large displacement torsion, and exhibited consistently improved rubber-metal interface peel strength. This product is particularly suitable for chassis systems of new energy vehicles and high-end passenger vehicles with stringent requirements for quietness, providing key component support for improving the overall vehicle ride quality.

[0183] In summary, this invention, through multi-dimensional innovations including movable Huff block structure, precision positioning, sealing design, injection flow channel optimization, modular maintenance, and heat dissipation coordination, successfully solves the long-standing technical problems of abnormal noise, loose assembly, and low efficiency in automotive stabilizer bar bushings.

[0184] The above embodiments are technically independent and highly compatible in function, and can be applied individually or flexibly combined. For example, combining the automated pre-alignment and segmented mold closing control of Embodiment 2 with the multi-cavity parallel structure of Embodiment 4 can build a high-cycle, high-consistency intelligent vulcanization production line; integrating the quick-change design of the HAF block of Embodiment 5 with the zoned temperature control and self-sealing exhaust system of Embodiment 6 can achieve continuous and stable manufacturing of high-performance thick-walled bushings.

[0185] This invention significantly improves product performance and greatly increases production efficiency. It is particularly suitable for the upgrade requirements of new energy vehicles and high-end passenger vehicle chassis systems for lightweighting, high durability, and NVH quietness, and has broad market application prospects.

[0186] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated vulcanizing mold for an automotive stabilizer bar assembly, the stabilizer bar assembly comprising a stabilizer bar (22), a rubber bushing (23) covering the stabilizer bar (22), and a metal frame (24), characterized in that, The mold includes a middle template (2) and an upper template (3) arranged sequentially from bottom to top; A main molding cavity space is provided between the upper template (3) and the middle template (2). A movable Huff component (7) is provided in the main molding cavity space. When the mold is closed, the movable Huff component (7) together with the stabilizing rod (22) and the metal skeleton (24) form an annular rubber cavity. The mold is also provided with a skeleton positioning mechanism (12) for positioning the metal skeleton (24) and a clearance structure for accommodating the U-shaped bending section of the stabilizer bar.

2. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 1, characterized in that, The movable Huff assembly (7) includes an upper Huff block (702) and a lower Huff block (703) that cooperate with each other. The lower Huff block is fixed to the middle template (2), and the upper Huff block (702) is pressed and positioned by the upper template (3). The inner sides of the upper Huff block (702) and the lower Huff block (703) are provided with sealing steps (701). The sealing steps (701) are pressed against the surface of the metal skeleton (24) in the mold-closed state to form a dynamic sealing interface.

3. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 2, characterized in that, The height of the sealing step (701) is 0.1 to 0.2 mm higher than the surface of the metal skeleton (24).

4. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 2, characterized in that, The bottom surface of the upper template (3) is provided with a receiving groove (301). When the mold is closed, the receiving groove (301) fits and presses the upper outer edge of the upper hafu block (702), while providing radial limiting.

5. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 4, characterized in that, The avoidance structure is an avoidance groove (202) opened in the middle template (2); the mold also includes a stabilizer positioning block (13), which is located on both sides of the avoidance groove (202) to limit the lateral displacement of the stabilizer body.

6. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 1, characterized in that, The skeleton positioning mechanism (12) includes a first pin (1201) and a second pin (1202); The first pin (1201) is installed inside the middle template (2), and its top protrudes from the top surface of the middle template (2) and is inserted into the positioning hole of the metal frame (24); The second pin (1202) is inserted upward from the lower template (1), and its top is supported on the bottom of the first pin (1201) to form an axial bearing structure.

7. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 1, characterized in that, It also includes a two-stage guidance and positioning system: The coarse positioning mechanism includes an upper guide post (10) and a lower guide post (11) that penetrate the middle template (2) for guiding large strokes; The precision positioning mechanism includes a precision positioning guide post (5) on the upper template (3) and a precision positioning guide sleeve (6) on the middle template (2).

8. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 1, characterized in that, It also includes a flow channel plate (4), which is located above the upper template (3) and has a flow channel groove (15) on its bottom surface. When the mold is closed, the flow channel groove (15) and the top surface of the upper template (3) together form a closed flow channel (16).

9. The integrated vulcanizing mold for the automotive stabilizer bar assembly according to claim 1, characterized in that, The main molding cavity is a multi-cavity structure, with each cavity evenly distributed along the mating surface between the middle template (2) and the upper template (3), and each is equipped with an independent movable hafnium assembly (7), a clearance structure and a skeleton positioning mechanism (12). The stabilizer assembly is the rear stabilizer assembly.

10. A method for integral vulcanization molding of an automotive stabilizer bar, characterized in that, Using the integrated vulcanizing mold for the automotive stabilizer bar assembly as described in any one of claims 2-5, the process includes the following steps: S1: The stabilizer bar (22) and the metal frame (24) after surface treatment and adhesive coating are placed on the lower hafn block (703), and the U-shaped section of the stabilizer bar (22) is inserted into the avoidance structure; S2: Place the upper Huff block (702) to complete the pre-assembly of the active Huff component (7); S3: Mold closing, pressing the upper mold plate (3) against the upper mold block (702), so that the sealing step (701) presses and seals the surface of the metal skeleton (24); S4: Inject the rubber material into the annular rubber cavity through the injection channel, maintain the mold temperature to the preset time, and allow the rubber material to fully vulcanize and mold. S5: After mold opening, eject the product and the movable Huff component (7), and separate the movable Huff component (7) by axial expansion to obtain an integrated vulcanized stabilizer assembly.

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