Composite material bullet train handrail hot press forming die

Abstract

The utility model provides a composite material bullet train handrail hot press forming die, which belongs to the composite material autoclave forming field, and comprises an upper die and a lower die, a forming cavity is formed between the upper die and the lower die, a plurality of heat dissipation holes are arranged between the upper die and the lower die, and the plurality of heat dissipation holes are arranged on the front side and the rear side of the forming cavity. According to the utility model, the bullet train armrest mold can be uniformly heated in the hot press molding of the autoclave, and the heat dissipation is sufficient, thereby improving the product quality.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of composite material autoclave molding, especially relates to a composite material bullet train handrail hot press forming die. BACKGROUND

[0002] Composite material refers to the composite material that can be used for processing main load-bearing structure and secondary load-bearing structure, and the stiffness and strength performance thereof is equivalent to or exceeds that of aluminum alloy, the autoclave forming process is that the composite material blank, honeycomb sandwich structure or glued structure is sealed on a die with a vacuum bag, is in a vacuum (or non-vacuum) state in an autoclave, is subjected to processes of temperature rising, pressure increasing, temperature keeping (medium temperature or high temperature), temperature falling and pressure releasing, so as to become a shaped process method with a required shape and quality.

[0003] The autoclave forming process is one of main shaping methods of advanced composite material structure, honeycomb sandwich structure and metal or composite material glued structure, and the manufactured component can be applied to main load-bearing and secondary load-bearing structure in the field of aerospace, and the autoclave forming process is mainly suitable for shaping of most thermosetting composite materials, honeycomb sandwich structures and glued structures.

[0004] The patent with the application number 202020030421.X provides a flat handrail arc forming die, which comprises a flat handrail upper die and a flat handrail lower die arranged in the up-down direction, can quickly form the flat handrail plate one time, greatly improves the forming efficiency and saves the working hours. The forming die provided by the patent is suitable for arc forming of all flat handrails of the car, is convenient to use and has high practicability. However, it cannot be used in the autoclave hot press forming, because the geometric size of the bullet train handrail is long, and the material in the die is not uniformly heated and not fully cooled in the process of temperature rising and falling of the autoclave, which directly affects the quality of the product. UTILITY MODEL CONTENTS

[0005] In view of the defects or deficiencies in the prior art, the utility model provides a composite material bullet train handrail hot press forming die, which can ensure that the bullet train handrail die is uniformly heated and fully cooled in the autoclave hot press forming, so as to improve the product quality.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] The embodiment of the utility model provides a composite material bullet train handrail hot press forming die, which comprises an upper die and a lower die, a forming cavity is formed between the upper die and the lower die, a plurality of heat dissipation holes are further arranged between the upper die and the lower die, and the plurality of heat dissipation holes are arranged on the front and back sides of the forming cavity.

[0008] Further, the upper die and the lower die are symmetrical.

[0009] Further, the upper die and the lower die are symmetrical.

[0010] Further, the upper die and the lower die are symmetrical.

[0011] Further, the upper die and the lower die are symmetrical.

[0012] Further, the upper die and the lower die are symmetrical.

[0013] Further, the upper die and the lower die are symmetrical.

[0014] Further, the upper die and the lower die are symmetrical.

[0015] Further, the upper die and the lower die are symmetrical.

[0016] Further, the upper die and the lower die are symmetrical.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. The utility model discloses a plurality of heat dissipation holes are set up on the forming die, and the plurality of heat dissipation holes are located at the two sides of the forming cavity, so that the cooling speed of the die during the pressure relief of the reheating pressure tank can be improved, and the defects of poor heat conductivity and uneven heating of the die are effectively improved.

[0019] 2. The utility model discloses a plurality of heat dissipation holes are set up on the forming die, and the plurality of heat dissipation holes are located at the two sides of the forming cavity, so that the cooling speed of the die during the pressure relief of the reheating pressure tank can be improved, and the defects of poor heat conductivity and uneven heating of the die are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the lower mold structure in the embodiment of the present utility model;

[0021] Among them, 1. Lower mold; 2. Threaded hole; 3. Molding groove; 4. Heat dissipation groove; 5. Handle heat dissipation hole; 6. Main heat dissipation hole; 7. Side heat dissipation hole. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] A typical implementation of the present invention is as follows: Figure 1 The figure shows a hot-pressing mold for composite material train handrails. It includes an upper mold and a lower mold 1. The upper and lower molds 1 have identical structures and are symmetrically arranged. Molding grooves 3 are provided on the lower end surface of the upper mold and the upper end surface of the lower mold 1. When the upper and lower molds 1 are fitted together, a molding cavity is formed between them. Threaded holes 2 are provided at the four corners of the upper and lower molds 1, allowing screws to secure the upper and lower molds 1 together. For simplicity, the upper mold drawing is omitted here.

[0024] When in use, the composite material blank, honeycomb sandwich structure or adhesive structure is sealed in the molding cavity of the mold with a vacuum bag, and placed in an autoclave under vacuum (or non-vacuum) state through heating, pressurizing, heat preservation (medium temperature or high temperature), cooling or pressure relief processes to achieve the required shape and quality.

[0025] In this embodiment, the molding cavity is used to mold the motor vehicle handrail, including a handle molding cavity corresponding to the handle and handle molding cavities corresponding to the handle at both ends of the handle molding cavity. The handle molding cavity is connected to the handle molding cavity. A plurality of heat dissipation grooves 4 are also provided on the lower end face of the upper mold and the upper end face of the lower mold 1. The heat dissipation grooves 4 of the upper mold and the lower mold 1 are symmetrically arranged. The cross-section of the heat dissipation grooves 4 is semicircular, so that a plurality of heat dissipation holes are formed between the upper mold and the lower mold 1. The plurality of heat dissipation holes are arranged on the front and rear sides of the handle molding cavity and are arranged side by side along the length direction of the handle molding cavity. The plurality of heat dissipation holes on the front and rear sides of the handle molding cavity are symmetrically arranged. By arranging a plurality of heat dissipation holes side by side on the front and rear sides of the handle molding cavity, the heat of the handle can be dissipated from the heat dissipation holes, thereby improving the cooling speed of the mold when the autoclave is depressurized, and avoiding uneven heat dissipation due to the handle being too long, thereby affecting the molding quality.

[0026] The upper die and the lower die 1 are also provided with a plurality of handle heat dissipation holes 5, which are respectively arranged corresponding to the handles at both ends of the handle, and the handle heat dissipation holes 5 are arranged in parallel with the handle forming cavities, wherein the handle heat dissipation holes of the upper die are located above the handle forming cavities, and the handle heat dissipation holes 5 of the lower die 1 are located below the handle forming cavities. Through the arrangement of the handle heat dissipation holes 5, the rapid heat dissipation of the handle can be realized, and the forming quality is improved.

[0027] Due to the long geometric size of the motor train handrail product, uneven heating is more likely to occur during hot pressing in the hot pressing tank, which leads to poor hot pressing effect of the product. By arranging a plurality of heat dissipation holes and handle heat dissipation holes 5 on both sides of the forming cavity, the cooling speed of the mold during pressure relief in the re-pressing tank can be improved, and the defects of poor heat conductivity and uneven heating of the mold can be effectively improved.

[0028] The upper die upper part and the lower die 1 lower part are provided with main heat dissipation holes 6 and side heat dissipation holes 7, the main heat dissipation holes 6 are located on the front and back sides of the upper die and the lower die 1, and the side heat dissipation holes 7 are located at both ends of the upper die and the lower die 1. By arranging the main heat dissipation holes 6 and the side heat dissipation holes 7 on the upper die and the lower die 1, a space connected to the outside is formed above and below the forming cavity. Therefore, when the hot pressing tank is evacuated and pressurized, the space above and below can increase the heating area of the mold, and the heat conductivity is strengthened, so that the mold is heated uniformly. At the same time, the support is beneficial to ensuring the strength of the mold in the vacuum environment of the hot pressing tank. The support also increases the pressure bearing area of the mold, increases the pressure of the mold, enhances the adhesion, improves the hot pressing forming effect of the product, and improves the product quality.

[0029] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A composite material motor car handrail hot press forming die, characterized in that, The upper die and the lower die form a molding cavity therebetween, and a plurality of heat dissipation holes are arranged between the upper die and the lower die and on the front and back sides of the molding cavity; The upper die and the lower die are symmetrical and have the same structure; The molding cavity is used for molding a handrail of a motor train and includes a handle molding cavity corresponding to a handle and handle molding cavities corresponding to handles at both ends of the handle molding cavity, and the handle molding cavity and the handle molding cavities are in communication; A plurality of heat dissipation grooves are symmetrically arranged on the lower end surface of the upper die and the upper end surface of the lower die, and the cross section of the heat dissipation grooves is semicircular, so that the heat dissipation grooves on the upper die and the lower die form the heat dissipation holes.

2. The hot press forming die for a composite material handrail of a bullet train according to claim 1, wherein Threaded holes are arranged at the four corners of the upper die and the lower die, and the upper die and the lower die are fixed together by screws.

3. The hot press forming die for a composite material handrail of a bullet train according to claim 1, wherein The plurality of heat dissipation holes are arranged on the front and back sides of the handle molding cavity and are arranged side by side along the length direction of the handle molding cavity, and the plurality of heat dissipation holes on the front and back sides of the handle molding cavity are symmetrically arranged.

4. The hot press forming die for a composite material handrail of a bullet train according to claim 1, wherein A plurality of handle heat dissipation holes are arranged on the upper die and the lower die, and the handle heat dissipation holes are respectively arranged corresponding to the handles at both ends of the handle, and the handle heat dissipation holes are arranged in parallel with the handle molding cavities.

5. The hot press forming die for a composite material handrail of a bullet train according to claim 4, wherein The handle heat dissipation holes of the upper die are above the handle molding cavities, and the handle heat dissipation holes of the lower die are below the handle molding cavities.

6. The composite material train handrail hot press forming die according to claim 1, characterized in that, The upper part of the upper die and the lower part of the lower die are provided with main heat dissipation holes and side heat dissipation holes, the main heat dissipation holes are arranged on the front and back sides of the upper die and the lower die, and the side heat dissipation holes are arranged at both ends of the upper die and the lower die.

7. The hot press forming die for a composite material handrail of a bullet train according to claim 6, wherein The main heat dissipation holes and the side heat dissipation holes form a space connected to the outside with the molding cavity.

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