Simple mold pressing mold for manufacturing resin-based chopped carbon fiber composite experimental material

Abstract

The utility model provides a simple mould pressing mould for manufacturing a resin-based chopped carbon fiber composite experimental material, which comprises a bottom plate and a cover plate, a mould cavity is arranged between the bottom plate and the cover plate, a middle pressing plate used for uniformly applying pressure to a composite material is arranged in the mould cavity, a groove is arranged on the middle pressing plate, and the middle pressing plate is provided with a pressing plate. And a flexible resistance type pressure sensor for measuring the applied pressure of the composite material is placed in the groove. The device is simple in structure, reasonable in design and easy to machine, the overall manufacturing cost and manufacturing difficulty of the experimental test piece are greatly reduced, and pressure measurement and control can be completed.

Description

Technical Field

[0001] The utility model relates to a compression mold in the field of composite material production, in particular to a simple compression mold for making resin-based short-cut carbon fiber composite experimental materials. Background Art

[0002] In the field of composite materials, carbon fiber composite materials have been widely used in aerospace, automobile manufacturing, sports equipment and other fields due to their light weight, high strength and high temperature resistance. However, in the early stage of composite material research and development, problems such as large investment in experimental materials, high cost of molding molds and complex structure have always plagued scientific researchers and enterprises. Therefore, designing a simple, efficient and low-cost molding mold to produce low-cost experimental specimens that meet national standards is of great significance for the preliminary study of the basic properties of composite materials. The existing technology has the following shortcomings: 1. Professional experimental equipment such as molding machines are required; 2. The mold structure is complex, the processing is difficult, the production cycle is long, and it is not easy to modify; 3. The overall performance is that the production cost of experimental specimens for the early development of composite material performance is high. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a simple molding die for producing resin-based chopped carbon fiber composite experimental materials. The die has a simple structure, is easy to use, and reduces the production cost. It is intended to improve production efficiency, reduce equipment requirements, and simplify the production process in order to produce experimental specimens of resin-based chopped carbon fiber composite materials that meet national standards.

[0004] The technical solution provided by the utility model is: a simple molding die for making resin-based short-cut carbon fiber composite experimental materials, comprising a base plate and a cover plate, a mold cavity is installed between the base plate and the cover plate, an intermediate pressing plate for uniformly applying pressure to the composite material is arranged in the mold cavity, a groove is opened on the intermediate pressing plate, and a flexible resistive pressure sensor for measuring the pressure applied by the composite material is placed in the groove.

[0005] Furthermore, pressure bolt holes are correspondingly opened in the middle of the four edges of the bottom plate, the cover plate and the mold cavity, and the bottom plate, the cover plate and the mold cavity are fixed together by pressure bolts and pressure nuts, and the middle pressure plate is pressurized.

[0006] Furthermore, the pressure bolt passes through the pressure bolt hole of the bottom plate through the mold cavity and then passes through the pressure bolt hole of the cover plate, and is tightened and pressurized by the pressure nut.

[0007] Furthermore, an anti-loosening gasket is arranged between each of the pressure nuts and the cover plate.

[0008] Furthermore, positioning screw holes are correspondingly provided at the four corners of the bottom plate and the mold cavity, and positioning bolts are inserted into the positioning screw holes.

[0009] Furthermore, the positioning bolts are inserted from the positioning screw holes of the bottom plate into the positioning screw holes of the mold cavity for positioning and fastening.

[0010] Furthermore, two grooves are symmetrically provided, a flexible resistive pressure sensor is arranged in each groove, and each of the flexible resistive pressure sensors is connected to a multimeter via a wire.

[0011] Furthermore, chamfers are provided at four corners of the outer edge of the intermediate pressing plate, and the chamfers form exhaust holes with the inner wall of the mold cavity when the intermediate pressing plate is placed in the mold cavity.

[0012] Furthermore, the bottom plate, cover plate and mold cavity are matched in shape and size.

[0013] The beneficial effects of the utility model are as follows: (1) the structure is simple and easy to process, and only conventional wire cutting, drilling and tapping processes are used; (2) the overall sandwich structure design is adopted, the mold is easy to open, and the components will not be stuck by the resin; (3) the pressure plate is pressurized by the pressure nut and the pressure bolt, and there is no need to use a molding machine that applies pressure by external force. The positioning bolt ensures accurate positioning to prevent the upper and lower molds from being misaligned, and the steel plate and the bolt are made of standard industrial materials and are easy to obtain; (4) the flexible resistive pressure sensor is simply calibrated to complete the measurement and control of the pressure. Compared with the prior art, the utility model greatly reduces the overall production cost and difficulty of the experimental specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0016] In the figure: 1—bottom plate, 2—cover plate, 3—mold cavity, 4—middle pressure plate, 401—chamfer, 5—flexible resistive pressure sensor, 6—lead wire, 7—pressure bolt hole, 8—pressure bolt, 9—positioning screw hole, 10—positioning bolt, 11—pressure nut. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be construed as limiting the present invention. In order to better illustrate the specific implementation methods of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0018] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1 and Figure 2 A simple molding die for making a resin-based chopped carbon fiber composite experimental material is shown, comprising a base plate 1 and a cover plate 2, a mold cavity 3 is installed between the base plate 1 and the cover plate 2, an intermediate pressing plate 4 for uniformly applying pressure to the composite material is arranged in the mold cavity 3, a groove is opened on the intermediate pressing plate 4, and a flexible resistive pressure sensor 5 for measuring the pressure applied by the composite material is placed in the groove.

[0021] The bottom plate 1, cover plate 2 and mold cavity 3 are provided with corresponding pressure bolt holes 7 at the middle of the four edges thereof. The bottom plate 1, cover plate 2 and mold cavity 3 are fixed together by pressure bolts 8 and pressure nuts 11, and the middle pressure plate 4 is pressurized.

[0022] The pressure bolt 8 passes through the pressure bolt hole of the bottom plate 1, passes through the mold cavity 3, and then passes through the pressure bolt hole of the cover plate 2, and is tightened and pressurized by the pressure nut 11. An anti-loosening gasket is arranged between each pressure nut 11 and the cover plate 2.

[0023] There are two symmetrical grooves, each of which is provided with a flexible resistive pressure sensor 5, and each of the flexible resistive pressure sensors 5 is connected to a multimeter via a wire 6. The flexible resistive pressure sensor 5 is used to measure the pressure applied by the composite material, and plays a role in accurately measuring and controlling the pressure.

[0024] The four corners of the outer edge of the intermediate pressing plate 4 are all provided with chamfers 401, and the chamfers 401 form exhaust holes with the inner wall of the mold cavity when the intermediate pressing plate 4 is placed in the mold cavity 3. The exhaust holes guide the gas in the resin base to be discharged, which is helpful for demoulding operation.

[0025] Example 2

[0026] On the basis of Example 1, the four corners of the base plate 1 and the mold cavity 3 are correspondingly provided with positioning screw holes 9, and positioning bolts 10 are inserted into the positioning screw holes 9. The positioning bolts 10 are inserted from the positioning screw holes of the base plate 1 into the positioning screw holes of the mold cavity 3 for positioning and fastening. The pressure bolt hole 7 is a smooth hole, and the positioning screw hole 9 has an internal thread.

[0027] The bottom plate 1, cover plate 2 and mold cavity 3 are matched in shape and size. The positioning bolt 10 ensures accurate positioning to prevent the upper and lower molds from being misaligned; the pressure bolt 8 and the pressure nut 11 play the role of applying pressure. The positioning bolt 10 is an industrial standard bolt with a diameter of 8 mm, and the pressure bolt 8 is an industrial standard bolt with a diameter of 12 mm. The cover plate 2 and bottom plate 1 are made of steel plates, which reduces the difficulty of processing.

[0028] When the utility model is used specifically, the positioning bolt 10 is inserted from the positioning screw hole of the base plate 1 into the positioning screw hole of the mold cavity 3, so that the mold cavity 3 and the base plate 1 are positioned and fastened, and then the raw material of the composite material is added into the mold cavity 3, and the intermediate pressure plate 4 is covered on the material, and the cover plate 2 is covered. The pressure bolt 8 is inserted from the pressure bolt hole of the base plate 1 through the mold cavity 3 and then comes out from the pressure bolt hole of the cover plate 2, and the gasket and the pressure nut 11 are placed in sequence, and the pressure nut 11 is tightened. With different degrees of tightening, different pressures are applied to the intermediate pressure plate 4, and the applied pressure is measured by the flexible resistive pressure sensor 5. After the molding is completed, the pressure bolt 8 and the positioning bolt 10 are removed, the entire mold is disassembled, and the pressed composite material test piece is taken out. The whole process is simple and convenient.

[0029] The composite materials that can be manufactured by the molding die of the utility model include but are not limited to short-cut carbon fibers, short glass fibers and other composite test materials.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simple molding die for making resin-based chopped carbon fiber composite experimental materials, comprising a bottom plate (1) and a cover plate (2), characterized in that: A mold cavity (3) is installed between the base plate (1) and the cover plate (2), an intermediate pressing plate (4) for evenly applying pressure to the composite material is arranged in the mold cavity (3), a groove is provided on the intermediate pressing plate (4), and a flexible resistive pressure sensor (5) for measuring the pressure applied by the composite material is placed in the groove.

2. A simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 1, characterized in that: The bottom plate (1), the cover plate (2) and the mold cavity (3) are provided with corresponding pressure bolt holes (7) at the middle of the four edges thereof. The bottom plate (1), the cover plate (2) and the mold cavity (3) are fixed together by pressure bolts (8) and pressure nuts (11), and the middle pressure plate (4) is pressurized.

3. A simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 2, characterized in that: The pressure bolt (8) passes through the pressure bolt hole of the base plate (1), passes through the mold cavity (3), and then passes through the pressure bolt hole of the cover plate (2), and is tightened and pressurized by the pressure nut (11).

4. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 3, characterized in that: An anti-loosening gasket is provided between each of the pressure nuts (11) and the cover plate (2).

5. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 2, characterized in that: Positioning screw holes (9) are correspondingly provided at the four corners of the bottom plate (1) and the mold cavity (3), and positioning bolts (10) are inserted into the positioning screw holes (9).

6. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 5, characterized in that: The positioning bolt (10) is inserted from the positioning screw hole of the base plate (1) into the positioning screw hole of the mold cavity (3) for positioning and fastening.

7. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 1, characterized in that: Two grooves are symmetrically provided, and a flexible resistance type pressure sensor (5) is arranged in each groove. Each flexible resistance type pressure sensor (5) is connected to a multimeter via a wire (6).

8. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 1, characterized in that: Chamfers (401) are provided at the four corners of the outer edge of the intermediate pressing plate (4), and the chamfers (401) form exhaust holes with the inner wall of the mold cavity when the intermediate pressing plate (4) is placed in the mold cavity (3).

9. The simple molding die for making resin-based chopped carbon fiber composite experimental material according to claim 1, characterized in that: The bottom plate (1), the cover plate (2) and the mold cavity (3) are matched in shape and size.

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