Core shaft pre-forming carbon fiber rim die

Abstract

The utility model belongs to the technical field of carbon fiber rim dies, and particularly relates to a mandrel pre-forming carbon fiber rim die which comprises an upper forming die and a lower forming die, a middle forming die is further arranged between the upper forming die and the lower forming die, and the upper forming die, the lower forming die and the middle forming die are overlapped to form an integral forming die during die assembly. According to the mandrel pre-forming carbon fiber rim die, the design of the mandrel is adopted, so that a product is accurately fixed and positioned in the die, and it is ensured that the position of the product in the die is accurate. The accurate positioning is beneficial to keeping the concentricity of the product, that is, the central axis of the product is aligned with the central axis of the mold; in the forming process, the mandrel can help to guide resin to flow uniformly, so that internal stress, deformation or defects caused by uneven flow are reduced; reworking and adjustment caused by unqualified products are reduced through control over the centrality, and the efficiency of a production line is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon fiber wheel rim mould technical field especially relates to a mandrel preform carbon fiber wheel rim mould. BACKGROUND

[0002] In the carbon fiber wheel rim mould manufacturing field, the traditional mould design mostly adopts the hollow setting in the middle part of the mould, and there is no any mechanism in the center, and the installation is through the guiding positioning installation, and then the concentricity of the product is not good, which can cause the balance and the rotation stability of the wheel rim to be influenced, and then the performance and the driving experience of the vehicle are influenced. In addition, the uneven flow caused by the hot pressing forming of the carbon fiber in the mould can easily cause the uneven stress distribution in the wheel rim, and cause the deformation or the defect of the wheel rim, and these quality problems can become the safety hidden danger when driving at high speed. Therefore, a mandrel preform carbon fiber wheel rim mould is needed. SUMMARY

[0003] Based on the existing technical problems, the utility model provides a mandrel preform carbon fiber wheel rim mould.

[0004] The utility model discloses a mandrel preform carbon fiber wheel rim mould, including forming upper die and forming lower die, still be provided with forming middle die between forming upper die and forming lower die, when closing mould, forming upper die, forming lower die and forming middle die superposition constitute integral forming mould.

[0005] The bottom surface of the forming upper die, the top surface of the forming lower die and the inner circle of the forming middle die are all provided with a forming cavity, the prefabricated carbon fiber wheel embryo is placed inside the forming cavity, a lower die clamping hole is formed in the inner wall center of the forming lower die, an upper die clamping hole is formed in the bottom center of the forming upper die, and a mandrel is clamped in the inner wall of the upper die clamping hole and the inner wall of the lower die clamping hole.

[0006] Preferably, the bottom of the forming upper die is respectively provided with a clamping groove, an upper die forming cavity, a pin positioning hole and an air guide hole, a plurality of pin positioning holes are arranged in a ring array on the surface of the forming upper die, and the surface of one end of the forming middle die is slidably connected with the inner wall of the clamping groove.

[0007] Preferably, the top of the forming lower die is respectively provided with a lower die forming cavity and a pin clamping hole, and when the forming upper die and the forming lower die are installed, the pin positioning hole is inserted and guided into the pin clamping hole through the pin.

[0008] Preferably, the outer arc surface of the forming middle die is fixedly installed with a plurality of supporting plate ears, and the supporting plate ears are arranged in a ring array on the outer arc surface of the forming middle die.

[0009] Preferably, the top surface of the forming middle mold is also provided with auxiliary through holes, and the plurality of auxiliary through holes are all limited by the sleeve of the pin during the installation of the forming upper mold and the forming lower mold.

[0010] Preferably, the forming middle mold is composed of an upper mold ring, a middle mold ring and a lower mold ring, the outer circular arc surface of the upper mold ring is provided with a taper, the inner wall of the upper mold ring, the inner wall of the middle mold ring and the inner wall of the lower mold ring are all provided with a side forming mold cavity, the four semicircular lower mold rings are placed in sequence on the forming lower mold in a head-to-tail manner, then the four semicircular middle mold rings are placed in sequence, and the butt joints of the head-to-tail connection are connected in a staggered manner with the butt joints of the four semicircular lower mold rings, and finally the four semicircular upper mold rings are placed on the top of the middle mold ring.

[0011] Preferably, the top surface of the forming middle mold is also provided with auxiliary through holes, and the plurality of auxiliary through holes are all limited by the sleeve of the pin during the installation of the forming upper mold and the forming lower mold.

[0012] The beneficial effects in the utility model are:

[0013] 1. The device accurately fixes and positions the product in the mold through the design of the mandrel, ensuring the accurate position of the product in the mold. This accurate positioning helps to maintain the concentricity of the product, that is, the center axis of the product is aligned with the center axis of the mold. In the forming process, the mandrel can help guide the uniform flow of resin, thereby reducing internal stress, deformation or defects caused by uneven flow. The control of the concentricity reduces the rework and adjustment caused by unqualified products, and improves the efficiency of the production line.

[0014] 2. The smooth cutting design reduces the friction and turbulence of the airflow when passing through the air guide pipe and the air guide hole. This design helps the airflow to smoothly enter the product, reducing energy loss and improving pneumatic efficiency. The streamlined air guide hole design can guide the airflow to enter the product in the direction with the least resistance, which can reduce airflow separation and backflow, improve the linearity and speed of the airflow. If the shape of the air guide hole is not properly designed, it will cause local pressure loss. The streamlined design helps to reduce such loss, so that more airflow energy can be used to improve the pneumatic performance of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of a mandrel preform carbon fiber wheel rim mold;

[0016] Figure 2 It is a forming upper mold structure perspective view of a mandrel preform carbon fiber wheel rim mold;

[0017] Figure 3 It is a forming lower die structure perspective view of a mandrel preform carbon fiber wheel rim mold;

[0018] Figure 4 It is a forming middle die structure perspective exploded view of a mandrel preform carbon fiber wheel rim mold;

[0019] Figure 5 It is a mandrel structure perspective view of a mandrel preform carbon fiber wheel rim mold;

[0020] Figure 6 It is a forming cavity structure perspective view of a mandrel preform carbon fiber wheel rim mold.

[0021] In the figure: 1, forming upper die; 11, clamping groove; 12, upper die forming cavity; 13, pin positioning hole; 14, air guide hole; 2, forming lower die; 21, lower die forming cavity; 22, pin clamping hole; 3, forming middle die; 31, auxiliary through hole; 32, upper die ring; 33, middle die ring; 34, lower die ring; 35, side forming cavity; 4, forming cavity; 5, lower die clamping hole; 6, upper die clamping hole; 7, mandrel; 8, support plate ear; 9, slider groove; 91, air nozzle slider; 92, air nozzle pressure contact hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Reference Figures 1-6 A mandrel preform carbon fiber wheel rim mold, comprising a forming upper die 1 and a forming lower die 2, and a forming middle die 3 is further arranged between the forming upper die 1 and the forming lower die 2, when the mold is closed, the forming upper die 1, the forming lower die 2 and the forming middle die 3 are stacked to form an integral forming mold.

[0024] The bottom surface of the forming upper die 1, the top surface of the forming lower die 2 and the inner circle of the forming middle die 3 are all provided with a forming cavity 4, a prefabricated carbon fiber wheel embryo is placed inside the forming cavity 4, a lower die clamping hole 5 is arranged in the center of the inner wall of the forming lower die 2, and an upper die clamping hole 6 is arranged in the center of the bottom of the forming upper die 1, the inner wall of the upper die clamping hole 6 and the inner wall of the lower die clamping hole 5 are both clamped with a mandrel 7.

[0025] The bottom of the forming upper die 1 is respectively provided with a clamping groove 11, an upper die forming cavity 12, a pin positioning hole 13 and an air guide hole 14, a plurality of pin positioning holes 13 are arranged in a circular array on the surface of the forming upper die 1, one end surface of the forming middle die 3 is slidably inserted with the inner wall of the clamping groove 11, and the non-driving surface of the device is designed with a large camber.

[0026] Specifically, this implementation facilitates the fixed installation of the forming middle mold 3 through the clamping groove 11, and the pin positioning hole 13 ensures the precise alignment between the forming upper mold 1, the forming middle mold 3 and the forming lower mold 2, reducing errors during mold assembly and improving the accuracy of wheel rim forming.

[0027] The top of the lower forming mold 2 is provided with a lower forming mold cavity 21 and a pin clamping hole 22. When the upper forming mold 1 and the lower forming mold 2 are installed, the pin positioning hole 13 is used to guide the installation through the pin and the pin clamping hole 22.

[0028] Specifically, this is implemented by using the pin clamping hole 22 and the pin positioning hole 13 for pin insertion and installation, which simplifies the mold assembly process and improves assembly efficiency.

[0029] A support plate ear 8 is fixedly installed on the outer arc surface of the molding mold 3, and multiple support plate ears 8 are distributed in a ring array on the outer arc surface of the molding mold 3.

[0030] Specifically, the tray lug 8 helps maintain the shape and positional stability of the mold 3 during molding, ensuring that the mold will not shift under high temperature and high pressure molding conditions; the tray lug 8 can prevent the carbon fiber from shifting during molding, ensuring that the fiber is cured in the predetermined direction and arrangement, thus improving the performance of the wheel rim; the tray lug 8 can serve as an auxiliary point for demolding, helping to more easily separate the mold and the molded wheel rim during demolding.

[0031] The top surface of the forming mold 3 is also provided with auxiliary through holes 31. Multiple auxiliary through holes 31 are connected and limited by pins during the installation of the upper forming mold 1 and the lower forming mold 2.

[0032] Specifically, the cooperation between the auxiliary through hole 31 and the pin can precisely control the relative positions between the upper forming mold 1, the middle forming mold 3, and the lower forming mold 2, ensuring the alignment accuracy of the mold and thus improving the forming accuracy of the product; the limiting function of the auxiliary through hole 31 and the pin can prevent the mold from accidentally opening during high-pressure forming, thus improving the safety of the production process.

[0033] The forming mold 3 is composed of an upper mold ring 32, a middle mold ring 33, and a lower mold ring 34 stacked together. The outer arc surface of the upper mold ring 32 is tapered. The inner walls of the upper mold ring 32, the middle mold ring 33, and the lower mold ring 34 are all provided with side forming cavities 35. When the forming mold 3 is installed, the four semi-arc lower mold rings 34 at the bottom are placed on the forming lower mold 2 end to end, and then the four semi-arc middle mold rings 33 are placed in sequence. The joints of the joints are staggered with the joints of the four semi-arc lower mold rings 34. Finally, the four semi-arc upper mold rings 32 are positioned on top of the middle mold rings 33.

[0034] Specifically, the taper design allows the molding middle mold 3 to be easily inserted into the clamping groove 11 of the molding upper mold 1 and automatically centered, improving installation efficiency and positioning accuracy; the taper fit has a certain self-locking effect, which can maintain the position of the molding middle mold 3 without additional fixation, preventing it from moving during the molding process; and the molding middle mold 3 is composed of the upper mold ring 32, the middle mold ring 33 and the lower mold ring 34, which can be disassembled for demolding after molding. The four-equal three-layer molding middle mold 3 staggered structure is used to form the carbon fiber rim barb under the 200T mold pressure, and the size and shape are accurately controlled without deviation and deformation; the middle mold ring 33 is installed and arranged in a staggered manner with the upper mold ring 32 and the lower mold ring 34, effectively dispersing the excessive stress concentration in the mold line area caused by the resin overflow during the molding process, thereby improving the impact resistance.

[0035] The top side of the molding upper mold 1 is also provided with a sliding block groove 9, and the inner wall of the sliding block groove 9 is fixedly communicated with the inner wall of the air guide hole 14. The inner wall of the sliding block groove 9 is slidably connected with an air nozzle sliding block 91, and the bottom surface of the air nozzle sliding block 91 and the inner top wall of the sliding block groove 9 are both provided with an air nozzle pressing hole 92.

[0036] Specifically, the design of the sliding block groove 9 and the air nozzle sliding block 91 achieves smooth cutting of the air guide pipe into the product air guide hole 14, and the air guide hole 14 has a more streamlined shape. The updated design of the air inlet mechanism has good air tightness, ensuring no air pressure leakage during the molding process.

[0037] The device achieves accurate fixing and positioning of the product in the mold by using the core shaft 7, ensuring the accurate position of the product in the mold. This accurate positioning helps to maintain the concentricity of the product, that is, the center axis of the product is aligned with the center axis of the mold; during molding, the core shaft 7 can help guide the uniform flow of resin, thereby reducing internal stress, deformation or defects caused by uneven flow; control of the center degree reduces the rework and adjustment caused by unqualified products, improving the efficiency of the production line.

[0038] The smooth cutting design reduces the friction and turbulence of the airflow when passing through the air guide pipe and the air guide hole. This design helps the airflow to flow smoothly into the product, reducing energy loss and improving aerodynamic efficiency; the streamlined air guide hole design can guide the airflow to enter the product in the direction with the least resistance, which can reduce airflow separation and backflow, improve the straightness and speed of the airflow; when the airflow passes through the air guide hole, if the shape of the air guide hole is not designed properly, it will cause local pressure loss. The streamlined design helps to reduce this loss, so that more airflow energy can be used to improve the aerodynamic performance of the product.

[0039] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A mandrel preform carbon fiber wheel rim mold characterized by: It includes a forming upper die (1) and a forming lower die (2), and a forming middle die (3) is further arranged between the forming upper die (1) and the forming lower die (2), when the dies are closed, the forming upper die (1), the forming lower die (2) and the forming middle die (3) are stacked to form an integral forming die; The bottom surface of the forming upper die (1), the top surface of the forming lower die (2) and the inner circle of the forming middle die (3) are all provided with a forming cavity (4), a prefabricated carbon fiber rim embryo is placed in the forming cavity (4), a lower die clamping hole (5) is arranged in the center of the inner wall of the forming lower die (2), an upper die clamping hole (6) is arranged in the center of the bottom of the forming upper die (1), the inner wall of the upper die clamping hole (6) and the inner wall of the lower die clamping hole (5) are both clamped with a mandrel (7).

2. A mandrel preformed carbon fiber wheel rim mold according to claim 1, wherein: The bottom of the forming upper die (1) is respectively provided with a clamping groove (11), an upper die forming cavity (12), a pin positioning hole (13) and a gas guide hole (14), a plurality of pin positioning holes (13) are arranged in an annular array on the surface of the forming upper die (1), and one end surface of the forming middle die (3) is slidably inserted into the inner wall of the clamping groove (11).

3. A mandrel preformed carbon fiber wheel rim mold according to claim 2, wherein: The top of the forming lower die (2) is respectively provided with a lower die forming cavity (21) and a pin clamping hole (22), when the forming upper die (1) and the forming lower die (2) are installed, the pin positioning hole (13) is inserted and guided into the pin clamping hole (22) through the pin.

4. A mandrel preformed carbon fiber wheel rim mold according to claim 1, wherein: The outer arc surface of the forming middle die (3) is fixedly installed with a plurality of supporting plate ears (8) which are arranged in an annular array on the outer arc surface of the forming middle die (3).

5. A mandrel preformed carbon fiber wheel rim mold according to claim 1, wherein: The top surface of the forming middle die (3) is further provided with a plurality of auxiliary through holes (31) which are sleeved and limited by pins during installation of the forming upper die (1) and the forming lower die (2).

6. A mandrel preformed carbon fiber wheel rim mold according to claim 1, wherein: The forming middle die (3) is composed of an upper die ring (32), a middle die ring (33) and a lower die ring (34), the outer arc surface of the upper die ring (32) is arranged in a taper shape, the inner wall of the upper die ring (32), the inner wall of the middle die ring (33) and the inner wall of the lower die ring (34) are all provided with a side forming cavity (35), when the forming middle die (3) is installed, the four semicircular lower die rings (34) are placed in sequence on the forming lower die (2) with their ends connected, then the four semicircular middle die rings (33) are placed in sequence, the butt joints of the connected ends of the middle die rings (33) are connected in a staggered manner with the butt joints of the four semicircular lower die rings (34), and finally the four semicircular upper die rings (32) are placed on the top of the middle die ring (33).

7. A mandrel preformed carbon fiber wheel rim mold according to claim 2, wherein: The top side of the forming upper die (1) is further provided with a sliding block groove (9), the inner wall of the sliding block groove (9) is fixedly communicated with the inner wall of the gas guide hole (14), a gas nozzle sliding block (91) is slidably inserted into the inner wall of the sliding block groove (9), and the bottom surface of the gas nozzle sliding block (91) and the inner top wall of the sliding block groove (9) are both provided with a gas nozzle pressing hole (92).

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