Disc wheel mold of layered double-air-inlet process

Abstract

The utility model provides a disc wheel mould adopting a layered double-air-inlet process, which comprises an upper mould, a lower mould and a core mould fixed between the upper mould and the lower mould, an air bag is arranged in the core mould, a disc wheel preform is attached to the surface of the air bag, the disc wheel preform comprises a disc wheel side cover part and a wheel rim main body part, an air inlet cavity is arranged in the air bag, and the air inlet cavity is communicated with the air bag. The air inlet cavity is used for ventilating and forming the side cover part of the disc wheel, a first air inlet nozzle is arranged at the bottom of the air bag, a second air inlet nozzle is arranged on the side wall of the air bag, the first air inlet nozzle and the second air inlet nozzle are communicated with the air inlet cavity, and a plurality of vent holes are formed in the side wall of the second air inlet nozzle. The vent holes are located in the wheel rim main body part, the vent holes conduct ventilation forming on the wheel rim main body part, the ventilation time of the disc wheel side cover part and the ventilation time of the wheel rim main body part can be synchronized, and the ventilation efficiency is improved. Only one air bag is needed, and the problem that rim forming deviates due to the fact that the air bag is low in price does not need to be considered.

Description

Technical Field

[0001] This utility model relates to a disc wheel mold with a layered dual-intake process, which is applied in the field of wheel rim manufacturing. Background Technology

[0002] The design concept of disc wheels is primarily based on aerodynamic principles. During high-speed cycling, the wheels experience significant air resistance, especially from the airflow resistance along the sides of the wheel. The disc-shaped rim of a disc wheel effectively reduces air turbulence along the sides of the wheel, allowing airflow to pass more smoothly over the wheel, thereby reducing air resistance and improving the bicycle's speed and riding efficiency.

[0003] Existing disc wheels, such as the disc wheel manufacturing method using a layered dual-intake process described in our patent application CN202411748373.7, use air bags to separately inflate the wheel body and side caps, thereby improving the rigidity and stability of the wheel rim through the dual-intake process. However, the wheel rim manufacturing mold has the following drawbacks:

[0004] 1. When using two air bags for air intake, the positioning of the two air bags needs to be considered. If the air bags shift during the manufacturing process of the disc wheel, it may cause deviations in the formed wheel rim.

[0005] 2. Due to the large volume difference between the internal cavity of the wheel rim body and the internal cavity of the side cover, during the process, the internal cavity of the wheel rim body completes air intake first and then waits for the internal cavity of the side cover to complete air intake, resulting in low air intake efficiency.

[0006] Therefore, in response to one or more of the above problems, this utility model designs a disc wheel mold with a layered dual-intake process. Utility Model Content

[0007] This invention provides a disc wheel mold with a layered dual-intake process, which can effectively solve the above-mentioned problems.

[0008] This utility model is implemented as follows:

[0009] A disc wheel mold with a layered dual-intake process includes an upper mold and a lower mold, and a core mold fixed between the upper and lower molds. An air bag is disposed inside the core mold, and a disc wheel preform is attached to the surface of the air bag. The disc wheel preform includes a disc wheel side cover and a wheel rim body.

[0010] An air inlet chamber is provided inside the air bag for air circulation and shaping of the disc wheel side cover. A first air inlet is provided at the bottom of the air bag, and a second air inlet is provided on the side wall of the air bag. The first and second air inlets are connected to the air inlet chamber. A plurality of ventilation holes are provided on the side wall of the second air inlet. When the disc wheel preform is attached to the surface of the air bag, the ventilation holes are located inside the main body of the wheel rim, and the ventilation holes circulate air to shape the main body of the wheel rim.

[0011] As a further improvement, the annular array of vents is disposed on the side wall of the second air inlet, and the number of vents is 2 to 5.

[0012] As a further improvement, the core mold includes several arc-shaped assembly blocks connected end to end. The arc-shaped assembly blocks are provided with first bolt holes, and the lower mold is provided with second bolt holes. The first bolt holes and the second bolt holes are fixed by bolts. A positioning block is provided on the side of the arc-shaped assembly block away from the first bolt holes, and the upper mold is provided with a positioning groove. The positioning block is located in the positioning groove.

[0013] As a further improvement, the disc wheel preform is made of carbon fiber composite material.

[0014] As a further improvement, the two sides of the air bag have a honeycomb structure.

[0015] As a further improvement, the disc wheel preform also includes a reinforcing portion corresponding to the honeycomb structure disposed on the inner wall of the disc wheel side cover portion.

[0016] As a further improvement, the two sides of the air bag have a spoked arrangement structure.

[0017] As a further improvement, the disc wheel preform also includes a reinforcing portion disposed on the inner wall of the disc wheel side cover portion, corresponding to the spoke arrangement structure.

[0018] The beneficial effects of this utility model are as follows: A first air inlet and a second air inlet are provided on an air bag. This utility model only requires one air bag and does not need to consider the problem of deviation in wheel rim forming caused by air bag slippage. The air inlet cavity is used to ventilate and form the disc wheel side cover, and the air vent is used to ventilate and form the wheel rim body. Simultaneously ventilating the air inlet cavity and the wheel rim body through the air vent allows for synchronized ventilation of the disc wheel side cover and the wheel rim body, improving ventilation efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an exploded structural diagram provided in an embodiment of the present invention.

[0021] Figure 2 This is a structural schematic diagram provided by an embodiment of the present utility model.

[0022] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0023] Figure 4 yes Figure 3 A magnified structural diagram at point B in the middle.

[0024] Figure 5 This is a schematic diagram of the reinforcing part structure provided in one embodiment of this utility model.

[0025] Figure 6 This is a schematic diagram of the reinforcing part structure provided in another embodiment of this utility model.

[0026] The accompanying diagrams are labeled as follows:

[0027] 10. Upper mold;

[0028] 20. Lower mold; 21. Second bolt hole;

[0029] 30. Core mold; 31. Arc-shaped assembly block;

[0030] 40. Air bag; 41. Air inlet chamber; 42. First air inlet; 43. Second air inlet; 431. Vent hole; 432. One-way valve;

[0031] 50. Disc wheel preform; 51. Disc wheel side cover; 52. Wheel rim body; 53. Reinforcing part. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0033] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Reference Figure 1 , Figure 2 , Figure 3 As shown, a disc wheel mold with a layered dual-intake process includes an upper mold 10 and a lower mold 20, and a core mold 30 fixed between the upper mold 10 and the lower mold 20. An air bag 40 is disposed inside the core mold 30, and a disc wheel preform 50 is attached to the surface of the air bag 40. The disc wheel preform 50 includes a disc wheel side cover portion 51 and a wheel rim body portion 52.

[0035] An air inlet chamber 41 is provided inside the air bag 40. The air inlet chamber 41 is used to ventilate and shape the disc wheel side cover portion 51. A first air inlet 42 is provided at the bottom of the air bag 40, and a second air inlet 43 is provided on the side wall of the air bag 40. The first air inlet 42 and the second air inlet 43 are connected to the air inlet chamber 41. A plurality of ventilation holes 431 are provided on the side wall of the second air inlet 43. When the disc wheel preform 50 is attached to the surface of the air bag 40, the ventilation holes 431 are located inside the wheel rim body portion 52. The ventilation holes 431 ventilate and shape the wheel rim body portion 52. A one-way valve 432 is provided between the second air inlet 43 and the air inlet chamber 41 to prevent gas from leaking from the ventilation holes 431.

[0036] In this embodiment, the vent holes 431 are arranged in an annular array on the side wall of the second air intake 43. The annular array design ensures that the airflow evenly covers the main body of the wheel rim, avoids molding defects caused by uneven local pressure, and improves air intake efficiency. The number of vent holes 431 is 2 to 5. By limiting the number of vent holes (2 to 5), sufficient air intake is ensured while preventing airflow overload and improving the structural consistency of the wheel rim body. Referring to Figure 4, in one embodiment, the number of vent holes is 2.

[0037] Reference Figure 1 As shown, the core mold 30 includes several arc-shaped assembly blocks 31 connected end to end. The arc-shaped assembly blocks 31 are provided with first bolt holes, and the lower mold 20 is provided with second bolt holes 21. The first bolt holes and the second bolt holes 21 are fixed by bolts.

[0038] The disc wheel preform 50 is made of carbon fiber composite material. The carbon fiber material significantly reduces the weight of the wheel rim while providing excellent tensile strength and fatigue resistance, making it suitable for high-speed motion scenarios.

[0039] Reference Figure 5 As shown, in one embodiment, the two sides of the air bag 40 have a honeycomb structure. The honeycomb structure improves the compressive strength of the air bag surface through biomimetic design and reduces the risk of deformation. While reducing the weight of the air bag, the honeycomb structure, together with the reinforcing part of the preform, further enhances the load-bearing capacity of the wheel rim side cover. The disc wheel preform 50 also includes a reinforcing part 53 corresponding to the honeycomb structure, which is disposed on the inner wall of the disc wheel side cover part 51.

[0040] Reference Figure 6 As shown, in another embodiment, the two side surfaces of the air bag 40 have a spoke arrangement structure. As a further improvement, the disc wheel preform 50 also includes a reinforcing part 53 corresponding to the spoke arrangement structure disposed on the inner wall of the disc wheel side cover portion 51. The spoke structure evenly distributes stress to the reinforcing part 53, avoids stress concentration, and improves the stability of the wheel rim when rotating at high speed.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disc wheel mold with a layered dual-intake process, comprising an upper mold (10) and a lower mold (20), and a core mold (30) fixed between the upper mold (10) and the lower mold (20), wherein an air bag (40) is disposed within the core mold (30), and a disc wheel preform (50) is attached to the surface of the air bag (40), the disc wheel preform (50) comprising a disc wheel side cover portion (51) and a wheel rim body portion (52), characterized in that, An air inlet chamber (41) is provided inside the air bag (40). The air inlet chamber (41) is used to ventilate and shape the disc wheel side cover (51). A first air inlet (42) is provided at the bottom of the air bag (40). A second air inlet (43) is provided on the side wall of the air bag (40). The first air inlet (42) and the second air inlet (43) are connected to the air inlet chamber (41). A plurality of ventilation holes (431) are provided on the side wall of the second air inlet (43). When the disc wheel preform (50) is attached to the surface of the air bag (40), the ventilation holes (431) are located inside the wheel rim body (52). The ventilation holes (431) ventilate and shape the wheel rim body (52).

2. The disc wheel mold with a layered dual-intake process according to claim 1, characterized in that, The ventilation holes (431) are arranged in a ring array on the side wall of the second air inlet (43), and the number of ventilation holes (431) is 2 to 5.

3. The disc wheel mold with a layered dual-intake process according to claim 1, characterized in that, The core mold (30) includes several arc-shaped assembly blocks (31) connected end to end. The arc-shaped assembly blocks (31) are provided with first bolt holes, and the lower mold (20) is provided with second bolt holes (21). The first bolt holes and the second bolt holes (21) are fixed by bolts.

4. The disc wheel mold with a layered dual-intake process according to claim 1, characterized in that, The disc wheel preform (50) is made of carbon fiber composite material.

5. The disc wheel mold with a layered dual-intake process according to claim 1, characterized in that, The two sides of the air bag (40) have a honeycomb structure.

6. The disc wheel mold with a layered dual-intake process according to claim 5, characterized in that, The disc wheel preform (50) also includes a reinforcing part (53) corresponding to the honeycomb structure disposed on the inner wall of the disc wheel side cover part (51).

7. A disc wheel mold with a layered dual-intake process according to claim 1, characterized in that, The air bag (40) has a spoke arrangement structure on both sides.

8. The disc wheel mold with a layered dual-intake process according to claim 7, characterized in that, The disc wheel preform (50) also includes a reinforcing part (53) provided on the inner wall of the disc wheel side cover part (51) corresponding to the spoke arrangement structure.

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