PET (Polyethylene Terephthalate) composite special-shaped part

Abstract

The utility model discloses a PET (Polyethylene Terephthalate) composite special-shaped part and an autoclave forming and curing device thereof, and belongs to the technical field of thermal forming of composite materials. The PET composite special-shaped part comprises an L-shaped first bending part, a transverse part and an L-shaped second bending part which are integrally formed, and PET + CFRT prepreg enters the forming lower die and the forming upper die after being subjected to linkage rotation through the first feeding roller pair and the second feeding roller pair; then packaging the forming lower mold, the forming upper mold, the first feeding roller pair and the second feeding roller pair by adopting a vacuum bag, then sealing, and then integrally pushing the autoclave forming and curing device into an autoclave for heating, pressurizing and curing, so as to obtain the PET composite special-shaped part. The PET composite special-shaped part which is light in weight, high in specific strength, high in wear resistance, anti-fatigue and good in forming process is designed to replace an existing adaptive connecting part made of a pure metal material, and the technical requirements for good function application of overall weight reduction, high specific strength, high wear resistance and anti-fatigue in an application scene are met.

Description

Technical Field

[0001] This utility model relates to a PET composite irregular part and its autoclave molding and curing device, belonging to the field of composite material thermoforming technology. Background Technology

[0002] PET foam, primarily composed of polyethylene terephthalate (PET), commonly known as polyester resin, is mainly used in the manufacture of synthetic fibers, films, and bottles, and also has applications in engineering plastics and other fields. While PET foam formed through foaming is relatively brittle, it possesses good heat resistance and mechanical strength. PET foam is recyclable, thus exhibiting good environmental performance. CFRT, or continuous fiber reinforced thermoplastic composite material, is widely used across various industries due to its high strength and low density.

[0003] Advanced PET composite materials possess advantages such as lightweight, high specific strength, high wear resistance, fatigue resistance, and good molding processability. They have been widely used in shipbuilding, rail vehicles, and new energy vehicles. Particularly in the shipbuilding sector, the extensive use of composite materials not only reduces ship weight and fuel consumption, increasing speed, but also lowers maintenance costs and extends the ship's service life. Therefore, it is necessary to design lightweight, high specific strength, high wear resistance, fatigue resistance, and easy-to-mold PET composite profiled parts to replace existing pure metal fitting connectors, achieving overall weight reduction, high specific strength, high wear resistance, and fatigue resistance in various application scenarios. Utility Model Content

[0004] The purpose of this utility model is to overcome the technical defects of the existing technology, solve the above-mentioned technical problems, and propose a PET composite irregular part and its autoclave molding and curing device.

[0005] The present invention specifically adopts the following technical solution: a PET composite irregular part, the PET composite irregular part includes an integrally formed first bending part, a transverse part, and a second bending part, one end of the first bending part is connected to one end of the transverse part, and the other end of the transverse part is connected to one end of the second bending part.

[0006] In a preferred embodiment, both the first bend and the second bend are L-shaped.

[0007] As a preferred embodiment, the PET composite irregular part is made of PET+CFRT prepreg formed by uniformly impregnating molten PET foaming resin with CFRT continuous reinforcing fibers in a continuous production process.

[0008] This utility model also proposes a thermoforming and curing device for PET composite irregular parts. The thermoforming and curing device includes a lower molding die, an upper molding die, and a vacuum bag for sealing. The lower molding die is disposed below the upper molding die. The PET composite irregular part is disposed in the cavity between the lower molding die and the upper molding die. A first pair of feeding rollers is provided at the front end of the lower molding die and the upper molding die, and a second pair of feeding rollers is provided at the rear end of the lower molding die and the upper molding die. The vacuum bag seals the lower molding die, the upper molding die, the first pair of feeding rollers, and the second pair of feeding rollers.

[0009] In a preferred embodiment, a first support frame and a second support frame are provided symmetrically distributed below the lower mold.

[0010] In a preferred embodiment, the PET+CFRT prepreg enters the lower mold and upper mold after being rotated in conjunction with the first and second feed roller pairs. Then, the lower mold, upper mold, first feed roller pairs, and second feed roller pairs are sealed by vacuum bags. Finally, the entire autoclave molding and curing device is pushed into the autoclave for heating and pressurization to cure, thereby producing PET composite shaped parts.

[0011] The beneficial effects achieved by this utility model are as follows: This utility model addresses the technical need to design lightweight, high-specific-strength, high-wear-resistance, fatigue-resistant, and well-molded PET composite irregularly shaped parts to replace existing pure metal adapter connectors, thereby achieving overall weight reduction, high specific strength, high wear resistance, and fatigue resistance in various application scenarios. It proposes a PET composite irregularly shaped part and its autoclave molding and curing device. The PET composite irregularly shaped part includes an integrally molded L-shaped first bending section, a transverse section, and an L-shaped second bending section. The material of the PET composite irregularly shaped part is PET formed by uniformly impregnating molten PET foaming resin with CFRT continuous reinforcing fibers in a continuous production process. The PET+CFRT prepreg is fed into the lower and upper molding dies via a first and second feed roller pair. The lower and upper molding dies, along with the first and second feed roller pairs, are then sealed in vacuum bags. The entire assembly is then pushed into an autoclave for heating and pressurization to produce PET composite shaped parts. This process comprehensively addresses the technical requirements of designing lightweight, high-specific-strength, high-wear-resistance, fatigue-resistant, and well-molded PET composite shaped parts to replace existing pure metal connectors, achieving overall weight reduction, high specific strength, high wear resistance, and fatigue resistance in various application scenarios. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the PET composite irregular part of this utility model.

[0013] Figure 2 This is a schematic diagram of the autoclave molding and curing device for PET composite irregular parts according to this utility model.

[0014] The markings in the diagram mean: 1-PET composite irregular part, 11-first bending part, 12-transverse part, 13-second bending part; 2-lower forming mold, 3-upper forming mold, 4-first support frame, 5-second support frame, 6-first feed roller pair, 7-second feed roller pair, 8-vacuum bag. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0016] Example 1: As Figure 1 As shown, this utility model proposes a PET composite irregular part. The PET composite irregular part 1 includes an integrally formed first bending part 11, a transverse part 12, and a second bending part 13. One end of the first bending part 11 is connected to one end of the transverse part 12, and the other end of the transverse part 12 is connected to one end of the second bending part 13.

[0017] In a preferred embodiment, both the first bend 11 and the second bend 13 are L-shaped.

[0018] As a preferred embodiment, the PET composite profile 1 is made of PET+CFRT prepreg formed by uniformly impregnating molten PET foaming resin with CFRT continuous reinforcing fibers in a continuous production process.

[0019] Example 2: Figure 2 As shown, this utility model also proposes a thermoforming and curing device for PET composite irregular parts. The thermoforming and curing device includes a lower molding mold 2, an upper molding mold 3, and a vacuum bag 8 for sealing. The lower molding mold 2 is disposed below the upper molding mold 3. The PET composite irregular part 1 is disposed in the cavity between the lower molding mold 2 and the upper molding mold 3. The front end of the lower molding mold 2 and the upper molding mold 3 is provided with a first feeding roller pair 6, and the rear end of the lower molding mold 2 and the upper molding mold 3 is provided with a second feeding roller pair 7. The vacuum bag 8 seals the lower molding mold 2, the upper molding mold 3, the first feeding roller pair 6 and the second feeding roller pair 7.

[0020] In a preferred embodiment, a first support frame 4 and a second support frame 5 are provided symmetrically distributed below the lower mold 2.

[0021] In a preferred embodiment, the PET+CFRT prepreg enters the lower molding die 2 and the upper molding die 3 after being rotated in conjunction with the first feed roller pair 6 and the second feed roller pair 7. Then, the lower molding die 2, the upper molding die 3, the first feed roller pair 6 and the second feed roller pair 7 are sealed by a vacuum bag 8. Then, the entire autoclave molding and curing device is pushed into the autoclave for heating and pressurizing curing to obtain the PET composite shaped part 1.

[0022] This utility model addresses the technical need to design lightweight, high-specific-strength, high-wear-resistance, fatigue-resistant, and well-molded PET composite irregular parts to replace existing pure metal adapter connectors, thereby achieving good functional applications with overall weight reduction, high specific strength, high wear resistance, and fatigue resistance. It proposes a PET composite irregular part and its autoclave molding and curing device. The PET composite irregular part 1 includes an integrally formed L-shaped first bending portion 11, a transverse portion 12, and an L-shaped second bending portion 13. The material of the PET composite irregular part 1 is a PET+CFRT prepreg formed by uniformly impregnating molten PET foaming resin with CFRT continuous reinforcing fibers in a continuous production process. The PET+CFRT prepreg is fed into the lower molding die 2 and the upper molding die 3 by the linkage of the first feed roller pair 6 and the second feed roller pair 7. Then, the lower molding die 2, the upper molding die 3, the first feed roller pair 6 and the second feed roller pair 7 are sealed by a vacuum bag 8. Then, the entire autoclave molding and curing device is pushed into the autoclave for heating and pressurization to produce the PET composite shaped part 1. This method solves the technical requirements of designing lightweight, high specific strength, high wear resistance, fatigue resistance and good molding process of PET composite shaped parts to replace the existing pure metal adapter connectors, and realizes the technical requirements of overall weight reduction, high specific strength, high wear resistance and fatigue resistance in application scenarios.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A PET composite irregular-shaped part, characterized in that, The PET composite irregular part (1) includes an integrally formed first bending part (11), a transverse part (12), and a second bending part (13). One end of the first bending part (11) is connected to one end of the transverse part (12), and the other end of the transverse part (12) is connected to one end of the second bending part (13). The autoclave molding and curing device for the PET composite irregular part includes a lower molding mold (2), an upper molding mold (3), and a vacuum bag (8) for packaging. The lower molding mold (2) is fitted onto the upper molding mold. Below the mold (3), the PET composite shaped part (1) is disposed in the cavity between the lower molding mold (2) and the upper molding mold (3). The front ends of the lower molding mold (2) and the upper molding mold (3) are provided with a first feed roller pair (6), and the rear ends of the lower molding mold (2) and the upper molding mold (3) are provided with a second feed roller pair (7). The vacuum bag (8) seals the lower molding mold (2), the upper molding mold (3), the first feed roller pair (6) and the second feed roller pair (7).

2. The PET composite irregular-shaped part according to claim 1, characterized in that, Both the first bend (11) and the second bend (13) are L-shaped.

3. The PET composite irregular-shaped part according to claim 1, characterized in that, The PET composite shaped part (1) is made of PET+CFRT prepreg formed by uniformly impregnating molten PET foaming resin with CFRT continuous reinforcing fibers in a continuous production process.

4. The PET composite irregular-shaped part according to claim 1, characterized in that, The lower mold (2) is provided with a first support frame (4) and a second support frame (5) that are symmetrically distributed on the left and right sides.

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