Automobile air pipe integrated forming die with good sealing performance
Patent Information
- Application Number
- CN202521940716.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-10
AI Technical Summary
[0002]在汽车风管的生产加工中，吹塑技术是目前应用广泛的主流工艺，其具体流程如下：先将管状塑料型坯加热至软化状态（或直接利用刚挤出的热态型坯），将其置于对开式模具内；闭模后立即向型坯内部通入压缩空气，使塑料型坯受气压作用吹胀，并紧密贴合模具内壁；待塑料冷却定型后脱模，即可得到所需的中空结构汽车风管制品；然而，当前市面上多数汽车风管成型模具存在密封性欠佳的问题；这一缺陷在吹塑成型过程中会直接导致型坯内部气压流失、压力不足，使得塑料无法充分吹胀并完全贴合模具内壁，最终造成风管的尺寸精度与形状一致性难以满足设计要求
（1）通过左模本体的中部所设有的凸起部与右模本体中部所设有的凹陷部，对应闭合结构， “凹凸嵌合” 的定位核心，能在合模时快速校准左右模本体的相对位置，避免因模体偏移导致型腔错位。这种设计可将模具型腔的尺寸误差控制在更小范围，尤其适配汽车风管复杂的中空结构需求，确保成型后的风管管径、弧度等关键尺寸符合设计标准，因此，提高汽车风管成型精度，减少因定位偏差产生的废品率。
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Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive duct molding technology, and in particular to an integrated molding mold for automotive ducts with good sealing performance. Background Technology
[0002] In the production and processing of automotive ducts, blow molding technology is currently the most widely used mainstream process. The specific process is as follows: First, a tubular plastic preform is heated to a softened state (or a freshly extruded hot preform is used directly), and then placed in a split mold. After the mold is closed, compressed air is immediately introduced into the preform, causing it to expand under air pressure and tightly adhere to the inner wall of the mold. After the plastic cools and solidifies, it is demolded to obtain the desired hollow automotive duct product. However, most automotive duct molding molds on the market currently suffer from poor sealing. This defect directly leads to air pressure loss and insufficient pressure inside the preform during blow molding, preventing the plastic from fully expanding and completely adhering to the inner wall of the mold. Ultimately, this results in the duct's dimensional accuracy and shape consistency failing to meet design requirements. Utility Model Content
[0003] To address the aforementioned shortcomings, the purpose of this invention is to provide an integrated molding die for automotive air ducts with good sealing performance. This allows the plastic preform to be fully inflated during the blow molding process, thereby improving the product molding rate and molding accuracy of automotive air ducts.
[0004] To achieve this objective, the present invention adopts the following technical solution: A well-sealed integrated molding die for automotive air ducts includes a left mold body and a right mold body. The left mold body has a left mold cavity, and the right mold body has a right mold cavity. The left mold body has a protrusion, and the right mold body has a corresponding recess. When the left mold body and the right mold body are closed, the protrusion and the recess are closed, and the left mold cavity and the right mold cavity form a complete cavity in the shape of an automotive air duct. A sealing step is provided on the periphery of the left mold body, and an installation groove is provided on the periphery of the right mold body. The sealing step is tightly engaged with the installation groove.
[0005] Preferably, in the above-mentioned well-sealed automotive duct integrated molding mold, each of the four corners of the left mold body is provided with an installation block, and the four corners of the right mold body are correspondingly provided with fixing grooves, and the installation block is engaged with the fixing groove.
[0006] Preferably, in the above-mentioned well-sealed automotive duct integrated molding mold, the mounting block is adapted to the fixing groove.
[0007] Preferably, the above-mentioned well-sealed automotive duct integrated molding mold further includes a demolding component. A demolding hole is provided in the middle of the left mold body. The demolding component is inserted into the demolding hole. By injecting gas into the demolding hole, the demolding component can be driven to slide inside the demolding hole.
[0008] Preferably, in the above-mentioned well-sealed automotive duct integrated molding mold, the demolding component includes a pin sleeve and a demolding ejector pin, the pin sleeve is inserted into the interior of the demolding hole, and the demolding ejector pin is slidably fitted with the pin sleeve.
[0009] Preferably, in the above-mentioned well-sealed automotive duct integrated molding mold, the inner wall of the needle sleeve is provided with a guide groove, the outer wall of the demolding ejector pin is provided with a sliding block, and the demolding ejector pin is slidably connected to the guide groove through the sliding block.
[0010] Preferably, in the above-mentioned well-sealed automotive duct integrated molding mold, the demolding ejector pin is detachably connected to a lifting connecting block.
[0011] The beneficial effects of this utility model are: (1) The protrusion in the middle of the left mold body and the recess in the middle of the right mold body form a corresponding closed structure. The positioning core of "concave-convex fitting" can quickly calibrate the relative position of the left and right mold bodies when the mold is closed, avoiding cavity misalignment due to mold body offset. This design can control the dimensional error of the mold cavity within a smaller range, especially suitable for the complex hollow structure requirements of automotive air ducts, ensuring that the key dimensions such as the diameter and curvature of the formed air duct meet the design standards. Therefore, it improves the forming accuracy of automotive air ducts and reduces the scrap rate caused by positioning deviation.
[0012] (2) A “stepped sealing interface” is constructed by tightly engaging the sealing platform provided on the periphery of the left mold body with the mounting groove provided on the right mold body. Compared with the traditional flat seal, the stepped structure increases the sealing contact area. At the same time, the engagement can offset the outward force of the compressed air inside the parison during the blow molding process, effectively preventing air pressure leakage. This design can ensure that the parison always maintains sufficient pressure during blow molding, fully fits the inner wall of the mold, avoids appearance defects such as “material shortage” and “wrinkles” in the air duct, and ensures that the wall thickness of the air duct is uniform, improving its wind pressure resistance and aging resistance performance, and further improving the molding accuracy of the automotive air duct. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the left mold body; Figure 3 This is a schematic diagram of the right mold body. Figure 4 This is a sectional view of the left mold body; Figure 5 for Figure 4 Enlarged view of section AA in the middle.
[0014] The components include: left mold body 11, right mold body 12, left mold cavity 13, right mold cavity 14, protrusion 15, recess 16, sealing ladder 17, mounting groove 18, mounting block 19, fixing groove 20, demolding component 21, demolding hole 22, pin sleeve 23, demolding ejector pin 24, guide groove 25, sliding block 26, and lifting connecting block 27. Detailed Implementation
[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0016] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.
[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0019] like Figures 1-5As shown, the well-sealed integrated mold for automotive air ducts includes a left mold body 11 and a right mold body 12. The left mold body 11 has a left mold cavity 13, and the right mold body 12 has a right mold cavity 14. The left mold body 11 has a protrusion 15, and the right mold body 12 has a corresponding recess 16. When the left mold body 11 and the right mold body 12 are closed, the protrusion 15 and the recess 16 close, and the left mold cavity 13 and the right mold cavity 14 form a complete cavity in the shape of an automotive air duct. A sealing step 17 is provided around the periphery of the left mold body 11, and an installation groove 18 is provided around the periphery of the right mold body 12. The sealing step 17 and the installation groove 18 are tightly engaged. The protrusion 15 in the middle of the left mold body 11 and the recess 16 in the middle of the right mold body 12 form a corresponding closed structure, resulting in a "convex-concave interlocking" structure. The positioning core can quickly calibrate the relative positions of the left mold body 11 and the right mold body 12 during mold closing, avoiding cavity misalignment caused by mold body offset. This design can control the dimensional error of the mold cavity within a smaller range, especially suitable for the complex hollow structure requirements of automotive air ducts, ensuring that the key dimensions such as the diameter and curvature of the formed air duct meet the design standards. Therefore, it improves the forming accuracy of automotive air ducts and reduces the scrap rate caused by positioning deviation.
[0020] It is worth noting that the sealing platform 17 provided on the periphery of the left mold body 11 is tightly engaged with the mounting groove 18 provided on the right mold body 12, thus constructing a "stepped sealing interface". Compared with the traditional flat seal, the stepped structure increases the sealing contact area. At the same time, the engagement can counteract the outward force of the compressed air inside the parison during the blow molding process, effectively preventing air pressure leakage. This design can ensure that the parison always maintains sufficient pressure during blow molding, fully conforms to the inner wall of the mold, avoids appearance defects such as "material shortage" and "wrinkles" in the air duct, and at the same time ensures that the wall thickness of the air duct is uniform, improves its wind pressure resistance and aging resistance performance, and further improves the molding accuracy of automotive air ducts.
[0021] In some embodiments of the well-sealed automotive duct integrated molding mold, each of the four corners of the left mold body 11 is provided with an mounting block 19, and the four corners of the right mold body 12 are correspondingly provided with fixing grooves 20, with the mounting blocks 19 engaging with the fixing grooves 20. Since the left mold body 11 is engaged with the fixing grooves 20 provided on the right mold body 12 through the mounting blocks 19, a "four-corner positioning and fixing system" is formed: on the one hand, it can assist in calibrating the mold position when the mold is closed, forming a "double positioning" with the central concave-convex structure, further improving the mold fitting accuracy; on the other hand, during the production process (such as mold closing and pressurization, cooling and demolding), it can stably fix the left body and the right mold body 12, avoiding the mold from loosening and shifting due to external force or internal air pressure.
[0022] In some embodiments, the integrated molding mold for automotive air ducts with good sealing performance is provided, wherein the mounting block 19 is adapted to the fixing groove 20; such a design makes it easier for the mounting block 19 and the fixing groove 20 to complete the snap-fit operation.
[0023] The well-sealed automotive duct integrated molding mold in this embodiment also includes a demolding component 21. A demolding hole 22 is provided in the middle of the left mold body 11, and the demolding component 21 is inserted into the demolding hole 22. By injecting gas into the demolding hole 22, the demolding component 21 can be driven to slide inside the demolding hole 22. The demolding component 21 is driven to slide by injecting gas into the demolding hole 22 through an externally provided air inflation device, without mechanical impact or manual prying. This can avoid scratches, deformation and other damage to the surface of the duct caused by traditional demolding methods. It is especially suitable for the thin-walled and fragile structural characteristics of automotive ducts, ensuring the appearance and structural integrity of the product. Secondly, the gas-driven demolding method has a rapid response and can quickly complete the demolding action after the duct cools and solidifies, shortening the production cycle of a single batch and improving the overall production efficiency.
[0024] In this embodiment, the integrated molding mold for automotive air ducts with good sealing performance includes a demolding component 21 comprising a pin sleeve 23 and a demolding ejector pin 24. The pin sleeve 23 is inserted into the demolding hole 22, and the demolding ejector pin 24 is slidably fitted with the pin sleeve 23. The inner wall of the pin sleeve 23 is provided with a guide groove 25, and the outer wall of the demolding ejector pin 24 is provided with a sliding block 26. The demolding ejector pin 24 is slidably connected to the guide groove 25 through the sliding block 26. Through the separate design of the pin sleeve 23 and the demolding ejector pin 24, and the precise fit between the guide groove 25 on the inner wall of the pin sleeve 23 and the sliding block 26 on the outer wall of the demolding ejector pin 24, and the slidable connection between the sliding block 26 on the outer wall of the demolding ejector pin 24 and the guide groove 25 on the inner wall of the pin sleeve 23, this design can strictly limit the sliding trajectory of the demolding ejector pin 24, avoiding deviation and jamming of the demolding ejector pin 24 during the demolding process, thereby ensuring the stability and consistency of each demolding action.
[0025] In some embodiments of the integrated mold for automotive air ducts with good sealing performance, the ejector pin 24 is detachably connected to the lifting connecting block 27; the lifting connecting block 27 and the ejector pin 24 are connected by a threaded connection. This design facilitates subsequent individual disassembly and replacement without the need to replace the entire ejector pin 24, thus reducing mold maintenance costs and downtime for repair.
[0026] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A one-piece molding die for automotive air ducts with good sealing performance, comprising a left mold body and a right mold body, characterized in that: The left mold body is provided with a left mold cavity, and the right mold body is provided with a right mold cavity. The left mold body is provided with a protrusion, and the right mold body is provided with a corresponding recess. When the left mold body and the right mold body are closed, the protrusion and the recess are closed, and the left mold cavity and the right mold cavity form a complete cavity in the shape of an automobile air duct. The left mold body is provided with a sealing ladder on its periphery, and the right mold body is provided with a mounting groove on its periphery. The sealing ladder is tightly engaged with the mounting groove.
2. The automobile air pipe integrated molding mold with good sealing according to claim 1, characterized in that: Each of the four corners of the left mold body is provided with a mounting block, and the four corners of the right mold body are respectively provided with fixing grooves, and the mounting blocks are engaged with the fixing grooves.
3. The automobile air pipe integrated molding mold with good sealing property according to claim 2, characterized in that: The mounting block is adapted to the fixing groove.
4. The automobile air hose integrally formed mold having a sealing property according to claim 1, characterized in that: It also includes a demolding component. A demolding hole is provided in the middle of the left mold body. The demolding component is inserted into the demolding hole. By injecting gas into the demolding hole, the demolding component can be driven to slide inside the demolding hole.
5. The automobile air hose integrally formed mold with sealing property according to claim 4, characterized in that: The demolding component includes a pin sleeve and a demolding ejector pin. The pin sleeve is inserted into the demolding hole, and the demolding ejector pin is slidably fitted with the pin sleeve.
6. The integrated molding die for automotive air ducts with good sealing performance according to claim 5, characterized in that: The inner wall of the needle sleeve is provided with a guide groove, and the outer wall of the demolding ejector pin is provided with a sliding block. The demolding ejector pin is slidably connected to the guide groove through the sliding block.
7. The automobile air hose integrally formed mold with sealing property according to claim 6, characterized in that: The ejector pin is detachably connected to a lifting connecting block.