Carbon fiber bicycle forming die

Abstract

A carbon fiber bicycle forming mold comprises an upper mold body and a lower mold body which are used for being matched with each other to conduct carbon fiber bicycle forming operation, the upper mold body and the lower mold body are connected through a positioning pin, the inner surface of the upper mold body and the inner surface of the lower mold body are each provided with a carbon fiber forming cavity, and the shape of each carbon fiber forming cavity is matched with the appearance of a carbon fiber bicycle; a middle pipe iron core used for being matched with the forming operation of the carbon fiber bicycle middle pipe is inserted in the carbon fiber forming cavity in the corresponding position of the carbon fiber bicycle middle pipe, and a positioning groove used for clamping and fixing the middle pipe iron core is formed in the lower die. A middle pipe rear side movable block and a middle pipe front R-angle movable block are further inserted into the carbon fiber forming cavities in the two sides of the middle pipe iron core, and grooves matched with the middle pipe rear side movable block and the middle pipe front R-angle movable block are further formed in the lower die. According to the utility model, the yarn clamping amount of the front and rear parting lines of the carbon fiber bicycle middle tube can be obviously reduced, so that the problem of parting line cracking is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber bicycle molding, in particular to a carbon fiber bicycle molding die. Background Art

[0002] The traditional mold structure of the center tube of the front triangle of a carbon fiber bicycle is an integrated upper and lower mold design. Generally, a conventional upper mold is an integral piece, and a lower mold is an integral piece, which are connected by locating pins. The parting line is in the middle of the front and rear ends of the center tube. This mold design is suitable for round center tubes. The outer diameter of the center tube is controlled by the mold cavity, and the inner diameter can be controlled by external boring. For the inner diameter control of special-shaped center tubes such as teardrop-shaped, square, and hexagonal center tubes, it is necessary to control it through center tube iron core molding. However, the molding method using the traditional center tube mold structure will cause the front and rear parting line of the center tube to have too much yarn clamping, the fiber to be discontinuous, and the frequent stress during riding will cause the front and rear parting line of the center tube to crack. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a carbon fiber bicycle forming mold which can significantly reduce the yarn clamping amount of the front and rear parting lines of the carbon fiber bicycle center tube to effectively solve the problem of parting line cracking in response to the deficiencies of the existing technology.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solutions: The present invention is a carbon fiber bicycle molding die, comprising an upper die and a lower die for cooperating with each other to perform carbon fiber bicycle molding operations, the upper die and the lower die being connected by a locating pin, and a carbon fiber molding cavity being provided on the inner surface of each die, the shape of the carbon fiber molding cavity matching the outer shape of the carbon fiber bicycle;

[0005] A middle tube iron core for cooperating with the carbon fiber bicycle middle tube forming operation is inserted into the carbon fiber forming cavity at the corresponding position of the carbon fiber bicycle middle tube. A positioning groove for fixing the middle tube iron core is provided on the lower mold. The carbon fiber forming cavities on both sides of the middle tube iron core are also inserted with the middle tube rear movable block and the middle tube front R angle movable block. The lower mold is also provided with grooves that cooperate with the middle tube rear movable block and the middle tube front R angle movable block.

[0006] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the above-mentioned carbon fiber bicycle forming mold, the movable block on the rear side of the middle tube and the R-angle movable block in the front of the middle tube are connected and locked with the upper mold and the lower mold through pins, bolts or mold shovels.

[0007] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the carbon fiber bicycle forming mold described above, the shape of the carbon fiber bicycle middle tube formed by the mold is special-shaped, round or square.

[0008] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the above-mentioned carbon fiber bicycle forming mold, the structural material of the mold is mold steel, aluminum alloy or composite material.

[0009] Compared with the existing technology, the carbon fiber bicycle forming mold provided by the utility model controls the inner diameter size by pressing the iron core of the mold tube, and adjusts the parting line to the left and right sides of the special-shaped middle tube. The mold at the parting line of the original design is tightly tangential to the outer surface of the middle tube, first scraping and then compacting. Since the middle tube is manually rolled, the density of the middle tube wall thickness is difficult to ensure, which often leads to excessive yarn insertion. The utility model adds a movable block at the rear side of the middle tube and a movable block at the lower R angle in front of the middle tube. There will be an action to compact the middle tube first. After compaction, the excess material will be squeezed into the parting line, thereby significantly reducing the yarn insertion amount and solving the problem of parting line cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0011] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0012] Reference Figure 1A carbon fiber bicycle molding mold includes an upper mold 1 and a lower mold 2 for cooperating with each other to perform a carbon fiber bicycle molding operation. The upper mold 1 and the lower mold 2 are connected by a locating pin 6. A carbon fiber molding cavity is provided on the inner surface of the upper mold 1 and the lower mold 2. The shape of the carbon fiber molding cavity matches the appearance of the carbon fiber bicycle. The upper mold 1 and the lower mold 2 serve as the main parts of the mold. Through precision processing, they ensure that they can fit closely to form a complete carbon fiber molding cavity. This fit not only requires high precision, but also needs to be able to withstand the high pressure and high temperature generated during the molding process to ensure that the carbon fiber material can be evenly and completely filled into every corner of the mold. The locating pin 6 is used to ensure that the upper mold 1 and the lower mold 2 can be accurately aligned when the mold is closed to prevent molding defects caused by misalignment. The locating pin 6 is usually designed at a key position of the mold, such as the middle tube area, to ensure the molding accuracy of key components such as the middle tube. The carbon fiber molding cavity is precisely carved into a shape that matches the appearance of the bicycle according to the specific design of the carbon fiber bicycle. This includes not only the main part of the frame, but also various complex curves and details, such as the shape of the middle tube, changes in the tube diameter of the frame, etc.

[0013] A middle tube iron core 3 for cooperating with the carbon fiber bicycle middle tube molding operation is inserted into the carbon fiber molding cavity at the corresponding position of the carbon fiber bicycle middle tube. A positioning groove for fixing the middle tube iron core 3 is provided on the lower mold 2. The middle tube is a key component of the bicycle frame. Its molding quality directly affects the overall strength and stability of the frame. The design of the middle tube iron core 3 is to provide sufficient support so that the carbon fiber material can be cured according to the predetermined shape during the molding process. The shape and size of the iron core must be closely matched with the molding cavity to ensure the final shape and dimensional accuracy of the middle tube.

[0014] The carbon fiber molding cavities on both sides of the middle tube core 3 are further equipped with middle tube rear movable blocks 4 and middle tube front R angle movable blocks 5. The lower mold 2 is also provided with grooves that cooperate with the middle tube rear movable blocks 4 and the middle tube front R angle movable blocks 5. The design of the middle tube rear movable blocks 4 and the middle tube front R angle movable blocks 5 is intended to further refine the molding process of the middle tube area, especially the connection area between the middle tube and other parts of the frame, such as the rear and front R angle parts. By adjusting the position and shape of these movable blocks, the shape and size of the middle tube can be fine-tuned to meet the needs of different bicycle designs, so that excess material is squeezed into the parting line, thereby significantly reducing the amount of yarn clamping and solving the problem of parting line cracking.

[0015] Preferably, the movable block 4 at the rear side of the middle tube and the movable block 5 at the front R angle of the middle tube are connected and locked with the upper mold 1 and the lower mold 2 by means of pins, bolts or mold shovels, so as to firmly fix the movable block 4 at the rear side of the middle tube and the movable block 5 at the front R angle of the middle tube on the upper mold 1 and the lower mold 2 to prevent movement or deformation during the molding process; pins and bolts provide a simple and effective connection method, while the mold shovel allows for faster and more flexible adjustments when needed; the mold shovel is an important component in the injection mold, and its general structure is a locking module, which is used to support the movable block 4 at the rear side of the middle tube and the movable block 5 at the front R angle of the middle tube to prevent the movable block 4 at the rear side of the middle tube and the movable block 5 at the front R angle of the middle tube from moving backward due to the pressure of injection molding during injection molding, thereby ensuring the dimensional accuracy of the injection molded parts.

[0016] The mold design allows for the molding of different shaped center tubes to meet the needs of different bicycle designs. For example, the molded carbon fiber bicycle center tubes can be shaped like irregular, round, or square. The irregular center tubes can provide more complex structural strength and aerodynamic performance; the round center tubes have better structural stability and are easy to process; and the square center tubes may provide unique visual effects and strength distribution in certain specific designs.

[0017] The mold is made of mold steel, aluminum alloy, or composite materials. Mold steel is widely used in the manufacture of high-precision molds due to its high strength and heat resistance; aluminum alloy is favored for its lightweight and good processing performance; composite materials may provide higher strength and more complex shape adaptability.

[0018] In actual use, the carbon fiber preform is placed in the carbon fiber molding cavity of the mold, the middle tube iron core 3 is inserted into the middle tube cavity reserved in the carbon fiber preform, and then the side slider of the movable block 4 on the rear side of the middle tube is pushed up, and finally the lower R angle movable block 5 in front of the middle tube is pushed up. The middle tube iron core 3 is fixed in place through the positioning groove designed in the lower mold 2, and the movable block 4 on the rear side of the middle tube and the lower R angle movable block 5 in front of the middle tube are fixed by the mold shovel machine.

[0019] Compared with the traditional mold structure: the original mold structure has a large amount of yarn clamping at the front and rear parting lines and is uncontrollable. It is easy to cause breakage when testing the fatigue, strength, front and rear collapse of the middle tube according to the EN ISO4210 standard. However, the utility model controls the inner diameter of the middle tube by the middle tube iron core and the outer diameter of the middle tube by the mold cavity, and adjusts the mold line to the left and right sides of the middle tube. Then, the middle tube is compacted by the movable block 4 on the rear side of the middle tube and the movable block 5 at the lower R angle at the front of the middle tube, so that the excess material after compaction will be squeezed into the parting line, thereby reducing the yarn clamping at the parting line and preventing the defect of parting line breakage.

Claims

1. A carbon fiber bicycle molding die, characterized by: The upper mold and the lower mold are used to cooperate with each other to perform the carbon fiber bicycle molding operation. The upper mold and the lower mold are connected by a positioning pin. The inner surfaces of the upper mold and the lower mold are both provided with a carbon fiber molding cavity. The shape of the carbon fiber molding cavity matches the appearance of the carbon fiber bicycle. A middle tube iron core for cooperating with the carbon fiber bicycle middle tube forming operation is inserted into the carbon fiber forming cavity at the corresponding position of the carbon fiber bicycle middle tube. A positioning groove for fixing the middle tube iron core is provided on the lower mold. The carbon fiber forming cavities on both sides of the middle tube iron core are also inserted with the middle tube rear movable block and the middle tube front R angle movable block. The lower mold is also provided with grooves that cooperate with the middle tube rear movable block and the middle tube front R angle movable block.

2. The carbon fiber bicycle forming mold according to claim 1, characterized in that: The movable block at the rear side of the middle tube and the movable block at the R angle in front of the middle tube are connected and locked with the upper mold and the lower mold through the cooperation of pins, bolts or mold scrapers.

3. The carbon fiber bicycle forming mold according to claim 1, characterized in that: The shape of the carbon fiber bicycle center tube formed by the mold is special-shaped, round or square.

4. The carbon fiber bicycle forming mold according to claim 1, characterized in that: The structural material of the mold is mold steel, aluminum alloy or composite material.

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