A mould for hot pressing of composite material panels

Abstract

A kind of mould for hot pressing of composite material board, including upper pressing plate, intermediate baffle ring and lower bottom plate;The upper pressing plate includes upper bearing plate and is connected with the pressing composite block below upper bearing plate;The lower bottom plate includes lower bearing plate and is connected with the pressing block on the upper bearing plate;The outer edge of the intermediate baffle ring below is provided with glue flow groove;The outer edge of the pressing block is provided with the corresponding matching groove with glue flow groove;The intermediate baffle ring is sleeved on the pressing block, and glue flow groove and the corresponding matching groove with glue flow groove form a glue outlet channel;The upper pressing plate is covered on the intermediate baffle ring.The utility model is composed of upper pressing plate, intermediate baffle ring and lower bottom plate, and it is more convenient to disassemble and install;Glue outlet channel is designed, and the resin content of composite material board can be controlled, so that the excess resin flows away from glue outlet channel.

Description

Technical Field

[0001] This utility model relates to molds, specifically to a mold for hot pressing composite material sheets. Background Technology

[0002] Hot pressing of composite material sheets is an advanced manufacturing process that uses high temperature and pressure to cure prepreg or fiber-reinforced resin matrix, and it is widely used in aerospace, automotive, and electronics industries. Existing hot pressing methods for composite material sheets generally require molds. For example, the invention patent with publication number CN114211676A provides a production device for composite sheet preparation. However, the mold is cumbersome and inconvenient to install, and when molding fiber composite materials, it is difficult to ensure that the fiber layers do not slip. Resin may flow out during molding and stick to the equipment, making it difficult to handle and compromising product quality. Utility Model Content

[0003] The purpose of this utility model is to provide a mold for hot pressing of composite material sheets. The mold is easy to install and disassemble, easy to operate, and is limited by a middle retaining ring to prevent slippage.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution for a mold used for hot pressing of composite material sheets:

[0005] The device includes an upper pressure plate, a middle retaining ring, and a lower base plate. The upper pressure plate includes an upper bearing plate and a composite material protrusion connected below the upper bearing plate. The lower base plate includes a lower bearing plate and a pressure plate protrusion connected above the lower bearing plate. A glue flow groove is formed on the outer edge below the middle retaining ring. A mating groove corresponding to the glue flow groove is formed on the outer edge of the pressure plate protrusion. The middle retaining ring is fitted onto the lower base plate, and a glue outlet channel is formed between the glue flow groove and the mating groove corresponding to the glue flow groove. The upper pressure plate covers the middle retaining ring.

[0006] The intermediate retaining ring is square.

[0007] Two glue-flowing grooves are formed around the middle retaining ring; and mating grooves that cover the two glue-flowing grooves are formed around the pressure plate protrusion.

[0008] The bottom four sides of the composite material protrusion are provided with a first mold opening angle; the inner wall above the middle retaining ring is provided with a second mold opening angle that matches the first mold opening angle.

[0009] The technical effects that this utility model can achieve are:

[0010] 1. This utility model consists of an upper pressure plate, a middle retaining ring, and a lower base plate, which makes disassembly and installation relatively convenient;

[0011] 2. A glue dispensing channel was designed to control the resin content of the composite material board, allowing excess resin to flow away through the glue dispensing channel;

[0012] 3. During the hot pressing process of composite material sheets, intermediate retaining rings are used to limit movement and ensure that the fiber layers do not slip. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0014] Figure 1 This is a schematic diagram of a mold for hot pressing composite material sheets after disassembly according to this utility model;

[0015] Figure 2 This is a cross-sectional view of a mold for hot pressing of composite material sheets according to this utility model after disassembly.

[0016] Figure 3 yes Figure 2 Enlarged view of part A;

[0017] Figure 4 This is a schematic diagram of the glue dispensing channel. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] See Figures 1 to 4 .

[0020] A mold for hot pressing composite material sheets includes an upper pressure plate 1, a middle retaining ring 4, and a lower base plate 6. The upper pressure plate 1 includes an upper bearing plate 2 and a composite material pressing protrusion 3 connected below the upper bearing plate 2. The lower base plate 6 includes a lower bearing plate 8 and a pressing plate protrusion 7 connected above the lower bearing plate 8. A glue flow groove 5 is provided on the outer edge below the middle retaining ring 4, and a mating groove 9 corresponding to the glue flow groove 5 is provided on the outer edge of the pressing plate protrusion 7. Specifically, the middle retaining ring 4 is square, and two glue flow grooves 5 are provided around the middle retaining ring 4. The pressing plate protrusion 7 is provided with mating grooves 9 covering the two glue flow grooves 5 around its perimeter.

[0021] In use, the intermediate retaining ring 4 is fitted onto the lower base plate 6, forming a glue outlet channel 21 between the glue flow groove 5 and the corresponding mating groove 9. The upper pressure plate 1 covers the intermediate retaining ring 4. In specific operation, each surface of the upper pressure plate 1, intermediate retaining ring 4, and lower base plate 6 is first coated with a release agent. Then, the intermediate retaining ring 4 is placed on the lower base plate 6, and the fiber prepreg is laid up to the designed layer thickness. The upper pressure plate 1 is then pressed on top of the layer. Next, the mold of this invention is placed in the press and pressed. The required heating temperature and pressure are set on the press. After the process is completed, the mold is removed, cooled, and disassembled to obtain the desired composite material board. Alternatively, the prepreg can be replaced with dry fiber, and thermosetting or thermoplastic resin can be used for brushing, powdering, or film laying. The above steps can be repeated to obtain the composite material board.

[0022] This invention employs the aforementioned hot pressing steps, which ensures that the upper and lower surfaces of the composite board are smooth and flat, with uniform thickness. The mold consists of an upper pressure plate 1, a middle retaining ring 4, and a lower base plate 6, facilitating installation and disassembly and making operation convenient. Furthermore, during use, the resin content of the composite board can be controlled through the glue outlet channel 21, allowing excess resin to flow away from the glue outlet channel 21, thus optimally ensuring the fiber content of the composite board. During the hot pressing process of the composite board, the middle retaining ring 4 provides a limiting mechanism to prevent slippage between fiber layers.

[0023] Preferably, the present invention provides a first mold opening angle 11 around the bottom of the composite material protrusion 3, and a second mold opening angle 12 matching the first mold opening angle 11 is provided around the inner wall above the middle retaining ring 4.

Claims

1. A mold for hot pressing composite material sheets, characterized in that: The system includes an upper pressure plate (1), a middle retaining ring (4), and a lower base plate (6); the upper pressure plate (1) includes an upper bearing plate (2) and a pressure composite material protrusion (3) connected below the upper bearing plate (2); the lower base plate (6) includes a lower bearing plate (8) and a pressure plate protrusion (7) connected above the lower bearing plate (8); a glue flow groove (5) is provided on the outer edge below the middle retaining ring (4); a matching groove (9) corresponding to the glue flow groove (5) is provided on the outer edge of the pressure plate protrusion (7); the middle retaining ring (4) is fitted on the lower base plate (6), and a glue outlet channel (21) is formed between the glue flow groove (5) and the matching groove (9) corresponding to the glue flow groove (5); the upper pressure plate (1) covers the middle retaining ring (4).

2. The mold for hot pressing composite material sheets according to claim 1, characterized in that: The intermediate retaining ring (4) is square.

3. A mold for hot pressing composite material sheets according to claim 2, characterized in that: Two glue-flowing grooves (5) are provided around the middle retaining ring (4); and mating grooves (9) covering the two glue-flowing grooves (5) are provided around the pressure plate protrusion (7).

4. A mold for hot pressing composite material sheets according to claim 1, characterized in that: The bottom four sides of the composite material protrusion (3) are provided with a first mold opening angle (11); the inner wall of the middle retaining ring (4) above is provided with a second mold opening angle (12) that matches the first mold opening angle (11).

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