Modularized mold for RTM (Resin Transfer Molding) process

Abstract

The utility model relates to a die, in particular to a modular die for an RTM (resin transfer molding) process, which comprises an upper die and a lower die which are fixedly assembled, a die cavity is formed between the upper die and the lower die, a plurality of injection nozzle devices for injecting liquid materials into the die cavity are included, and the upper die and the injection nozzle devices are of a split structure. The upper mold is provided with a plurality of mounting holes which are used for being matched with the injection nozzle device and are communicated with the mold cavity, the injection nozzle device is fixedly assembled on the upper mold through the mounting holes, and the injection nozzle device and the upper mold are designed in a split manner, and the injection nozzle part becomes an independent unit, so that the injection nozzle device has a modular functional design; the injection port can be replaced at any time, the situation that continuous use of the mold is affected due to the fact that a cavity of the injection port is frequently cleaned or the injection port deforms due to external force is avoided, in addition, the overall structural stability is improved through continuous optimization and improvement, and the injection port further has the advantages of being simple in structure, convenient to machine, easy to assemble and high in practicability.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a modular mould of RTM technology. Background Art

[0002] Resin transfer molding (RTM) is a liquid molding process for composite materials. Patents such as CN103237642BRTM, titled "Forming Device, RTM Forming Method, and Semi-Formed Body," offer advantages such as high production efficiency, high product quality, and economical and environmentally friendly manufacturing. The process involves laying a preform of reinforced material consistent with the part's structural form within the mold cavity. Liquid resin is then injected into the closed mold cavity through an injection port while simultaneously applying a vacuum. This allows the resin to permeate the molded body while displacing all air in the cavity. The product is then released from the mold after the resin solidifies. The injection port of traditional molds is often designed as an integral part of the mold. Upon reuse, a drill must be used to remove any previously cured resin. This wears out the injection port cavity with increasing frequency, impacting the lifespan of the entire mold. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a modular mold for RTM process.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a modular mold for RTM process, characterized in that it includes a fixedly assembled upper mold and a lower mold, a mold cavity is formed between the upper mold and the lower mold, and includes a plurality of injection nozzle devices for injecting liquid material into the mold cavity. The upper mold and the injection nozzle device are split structures, and the upper mold is provided with a plurality of mounting holes for cooperating with the injection nozzle device and connected to the mold cavity. The injection nozzle device is fixedly assembled on the upper mold through the mounting holes.

[0005] The injection nozzle device includes a blocking portion, the lower bottom surface of the blocking portion coincides with the upper surface of the upper mold, and the injection nozzle device is fixedly assembled at the mounting hole through the blocking portion.

[0006] An injection nozzle is provided above the blocking portion, and a through hole is provided in the center of the blocking portion to match the injection nozzle and communicate with the mold cavity. Liquid material is injected into the mold cavity through the matching of the injection nozzle and the through hole.

[0007] An extension portion for extending the through hole is provided at the bottom of the blocking portion, and the blocking portion is inserted into the mounting hole through the extension portion to achieve position limiting.

[0008] The blocking part and the injection nozzle are split structures. The top of the blocking part is provided with a mounting groove for matching the injection nozzle, and the injection nozzle is provided with a connecting part that matches the mounting groove. The injection nozzle and the blocking part are fixed and assembled through the matching of the connecting part and the mounting groove in a threaded manner.

[0009] The connecting portion and the upper mold are fixedly assembled by fastening with screws.

[0010] A connector for matching with the catheter is provided on the injection nozzle and at the other end relative to the connecting portion. The connector is a pagoda head structure.

[0011] A first sealing ring is provided on the side surface of the extension portion.

[0012] A second sealing ring is provided at the bottom of the blocking portion.

[0013] The upper die is provided with a plurality of hanging rings for conveniently suspending the upper die.

[0014] The beneficial effects of the present invention are as follows: the present invention separates the injection nozzle device and the upper mold into a separate design, and the injection nozzle component becomes an independent unit, so that the injection nozzle device has a modular functional design and can be replaced at any time, avoiding frequent cleaning of the injection nozzle cavity or deformation of the injection nozzle due to external force, thereby affecting the continued use of the mold. In addition, the overall structural stability is improved through continuous optimization and improvement. The present invention also has the characteristics of simple structure, easy processing and easy assembly, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is an exploded view of the structure of the present utility model;

[0017] Figure 3 It is a cross-sectional view of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the injection nozzle device of the utility model Figure 1 ;

[0019] Figure 5 This is an exploded view of the structure of the injection nozzle device of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the injection nozzle device of the utility model Figure 2 ;

[0021] Figure 7 This is a cross-sectional view of the injection nozzle device of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 7As shown, a modular mold for RTM process includes a fixedly assembled upper mold 100 and a lower mold 200, a mold cavity is formed between the upper mold 100 and the lower mold 200, including a plurality of injection nozzle devices 300 for injecting liquid material into the mold cavity, the upper mold 100 and the injection nozzle device 300 are split structures, the upper mold 100 is provided with a plurality of mounting holes 110 for matching the injection nozzle device 300 and connected to the mold cavity, the injection nozzle device 300 is fixedly assembled on the upper mold 100 through the mounting holes 110, changing the previous integrated structure of the injection nozzle device 300 and the upper mold 100 to a split structure, the independent unitization of the injection nozzle device 300 makes the mold a modular design structure, the injection nozzle device 300 can be replaced at any time, to avoid frequent cleaning of the cavity of the injection port or deformation of the injection port due to external force, thereby affecting the continued use of the mold.

[0023] The injection nozzle device 300 includes a blocking portion 310, the lower bottom surface of the blocking portion 310 coincides with the upper surface of the upper mold 100, and the injection nozzle device 300 is fixedly assembled at the mounting hole 110 through the blocking portion 310. Adding the blocking portion 310 increases the cross-sectional area of ​​the injection nozzle device 300 and enhances the stability of the connection.

[0024] An injection nozzle 320 is provided above the blocking portion 310 , and a through hole 311 is provided in the center of the blocking portion 310 to cooperate with the injection nozzle 320 and communicate with the mold cavity. Liquid material is injected into the mold cavity through the cooperation of the injection nozzle 320 and the through hole 311 .

[0025] The bottom of the blocking portion 310 is provided with an extension portion 330 for extending the through hole 311. The blocking portion 310 is inserted into the mounting hole 110 through the extension portion 330 to achieve positioning. The extension portion 330 is inserted into the mounting hole 110, which greatly improves the connection stability between the connecting portion 321 and the upper mold 100.

[0026] The blocking portion 310 and the injection nozzle 320 are split structures. The top of the blocking portion 310 is provided with a mounting groove 312 for cooperating with the injection nozzle 320, and the injection nozzle 320 is provided with a connecting portion 321 that cooperates with the mounting groove 312. The injection nozzle 320 and the blocking portion 310 cooperate with the mounting groove 312 through the connecting portion 321 and are fixedly assembled in a threaded manner. If only the injection nozzle 320 is blocked or needs to be cleaned or replaced, the injection nozzle 320 can be removed without removing the connecting portion 321. This is why the blocking portion 310 and the injection nozzle 320 are made split. The side of the injection nozzle 320 is provided with a connecting block 322 for convenient fastening of the injection nozzle 320. The cross-section of the connecting block 322 is a regular hexagonal structure. The addition of the connecting block 322 facilitates the disassembly and assembly of the injection nozzle 320 with fastening tools, such as a wrench.

[0027] The connecting portion 321 and the upper mold 100 are fixedly assembled by screw fastening, which is convenient for assembly and disassembly.

[0028] A connector 324 for cooperating with a catheter (not shown in the figure) is provided on the injection nozzle 320 and at the other end relative to the connecting portion 321. The connector 324 is a pagoda head structure, which is a relatively mature structure on the market and will not be described in detail here. The connector 324 is preferably a pagoda head structure for easy assembly of the catheter, which is a pipe for transporting liquid materials.

[0029] A first sealing ring 331 is provided on the side of the extension portion 330 . The addition of the first sealing ring 331 strengthens the sealing between the extension portion 330 and the mounting hole 110 .

[0030] A second sealing ring 313 is provided at the bottom of the blocking portion 310 . The second sealing ring 313 is added to strengthen the sealing between the blocking portion 310 and the upper mold 100 .

[0031] The upper mold 100 is provided with a plurality of lifting rings 120 for suspending the upper mold 100 . The addition of the lifting rings 120 facilitates the direct mechanical lifting of the upper mold 100 , thereby improving practicality.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, simple modifications and substitutions by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A modular mold for RTM process, characterized in that: The invention comprises an upper mold (100) and a lower mold (200) which are fixedly assembled, wherein a mold cavity is formed between the upper mold (100) and the lower mold (200), and comprises a plurality of injection nozzle devices (300) for injecting liquid material into the mold cavity. The upper mold (100) and the injection nozzle devices (300) are of a split structure. The upper mold (100) is provided with a plurality of mounting holes (110) for cooperating with the injection nozzle devices (300) and communicating with the mold cavity. The injection nozzle devices (300) are fixedly assembled on the upper mold (100) through the mounting holes (110).

2. A modular mold for RTM process according to claim 1, characterized in that: The injection nozzle device (300) comprises a blocking portion (310), the lower bottom surface of the blocking portion (310) coincides with the upper surface of the upper mold (100), and the injection nozzle device (300) is fixedly assembled at the mounting hole (110) through the blocking portion (310).

3. A modular mold for RTM process according to claim 2, characterized in that: An injection nozzle (320) is provided above the blocking portion (310), and a through hole (311) is provided at the center of the blocking portion (310) that matches the injection nozzle (320) and is connected to the mold cavity. Liquid material is injected into the mold cavity through the combination of the injection nozzle (320) and the through hole (311).

4. A modular mold for RTM process according to claim 3, characterized in that: An extension portion (330) for extending the through hole (311) is provided at the bottom of the blocking portion (310), and the blocking portion (310) is inserted into the mounting hole (110) through the extension portion (330) to achieve position limiting.

5. A modular mold for RTM process according to claim 3, characterized in that: The blocking portion (310) and the injection nozzle (320) are of a split structure. The top of the blocking portion (310) is provided with a mounting groove (312) for matching the injection nozzle (320). The injection nozzle (320) is provided with a connecting portion (321) that matches the mounting groove (312). The injection nozzle (320) and the blocking portion (310) are fixedly assembled in a threaded manner through the matching of the connecting portion (321) and the mounting groove (312).

6. A modular mold for RTM process according to claim 5, characterized in that: The connecting portion (321) and the upper mold (100) are fixedly assembled by screw fastening.

7. A modular mold for RTM process according to claim 5, characterized in that: A connector (324) for matching with a catheter is provided on the injection nozzle (320) and at the other end relative to the connecting portion (321). The connector (324) is a pagoda head structure.

8. A modular mold for RTM process according to claim 4, characterized in that: A first sealing ring (331) is provided on the side surface of the extension portion (330).

9. A modular mold for RTM process according to claim 8, characterized in that: A second sealing ring (313) is provided at the bottom of the blocking portion (310).

10. A modular mold for RTM process according to any one of claims 1 to 9, characterized in that: The upper mold (100) is provided with a plurality of hanging rings (120) for conveniently suspending the upper mold (100).

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