Water-soluble sand-silicone rubber mold for forming carbon fiber material

Abstract

The utility model relates to a water-soluble sand-silicon rubber mould for forming a carbon fiber material, which comprises an upper mould, a lower mould, a left mould, a right mould and a silicon rubber core mould, a cavity is formed in the right mold, a silicon rubber core mold designed according to the shape of a part is placed in the cavity, the right mold is of a flat plate plugging structure, the left mold is of a flat plate structure embedded with a straight-through hole, the silicon rubber core mold and the left mold form an integrated core mold, water-soluble sand is poured into the silicon rubber core mold through the straight-through hole in the left mold, and the water-soluble sand is poured into the silicon rubber core mold through the straight-through hole in the right mold. The cured water-soluble sand, the silicon rubber core mold and the left mold form the water-soluble sand-silicon rubber core mold. The metal core mold solves the problem that a traditional metal core mold cannot demold special-shaped parts, and has the advantages of being low in manufacturing cost and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of non-metallic material molding, and particularly relates to a water-soluble sand-silicone rubber mold for molding carbon fiber materials. Background Art

[0002] At present, most non-metallic material forming molds are single-sided or combined metal molds. However, due to the limitations of metal mold processing technology, the inner cavity is a metal core and cannot guarantee the quality of the inner and outer surfaces of products with complex curved surfaces, such as S-shaped, tubular, box-shaped and other special-shaped products with large curvature. Figure 1 As shown, a new type of mold needs to be developed to solve this problem. Utility Model Content

[0003] Based on the above shortcomings, the utility model provides a water-soluble sand-silicone rubber mold for carbon fiber material molding, which is used to solve the defects exposed during the processing of parts of S-shaped, tubular, box-shaped and other special-shaped products with large curvature, such as difficulty in demolding, inability to demold, lack of glue in the inner cavity, delamination, etc., thereby replacing the existing metal molds.

[0004] The technical solution adopted by the utility model is: a water-soluble sand-silicone rubber mold for molding carbon fiber materials, comprising an upper mold, a lower mold, a left mold, a right mold and a silicone rubber core mold, the inner cavities of the upper mold and the lower mold are two corresponding semicircular structure mold chambers designed according to the shape of the part, a silicone rubber core mold designed according to the shape of the part is placed in the mold chamber, the left mold is a flat plate structure embedded with a straight through hole, the silicone rubber core mold and the left mold form an integrated core mold, the right mold is a flat plate sealing structure, water-soluble sand is poured into the silicone rubber core mold through the straight through hole on the left mold, and the solidified water-soluble sand, silicone rubber core mold and left mold form a water-soluble sand-silicone rubber core mold.

[0005] The utility model also has the following technical features:

[0006] 1. The upper mold, the lower mold and the water-soluble sand-silicone rubber core mold are fixed together and are blocked and limited by the right mold.

[0007] 2. The water-soluble sand-silicone rubber core mold is an integrated protruding workbench inner surface structure, which is used for part cavity molding.

[0008] 3. The surface of the water-soluble sand-silicone rubber core mold is covered with carbon fiber prepreg cloth.

[0009] The beneficial effects and advantages of the utility model are: the utility model solves the problem that traditional metal core molds cannot demold special-shaped parts, and is suitable for demolding products with S-shaped, tubular, box-shaped and even more special-shaped and complex curved surfaces. The inner and outer surfaces of the parts produced are free of processing defects such as glue deficiency and delamination, and have the advantages of low manufacturing cost and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the shape drawing of S-type parts;

[0011] Figure 2 This is a three-dimensional structural diagram of the mold assembly of the present utility model;

[0012] Figure 3 This is the exploded structure diagram of the mold of the present utility model;

[0013] Figure 4 This is a top view of the mold of the present utility model;

[0014] Figure 5 for Figure 4 Cross-sectional view of AA in the figure. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The utility model is described in detail with reference to the accompanying drawings and specific embodiments:

[0016] Example 1

[0017] like Figure 2-3As shown, a water-soluble sand-silicone rubber mold for molding carbon fiber materials includes an upper mold 1, a lower mold 2, a left mold 3, a right mold 4 and a silicone rubber core mold 5. The inner cavities of the upper mold 1 and the lower mold 2 are semicircular structure chambers designed according to the shape of S-shaped parts. The left mold 3 is a flat plate structure with a straight through hole, and the right mold 4 is a flat plate sealing structure. The inner cavity surfaces of the four modules are paved with wax sheets to reserve part thickness and expansion gaps. Unvulcanized silicone rubber is paved on the wax sheets. The silicone rubber needs to be vulcanized at 200°C for 1 hour and cured at 65°C for 4 hours. During the curing process, compressed air is filled through the straight-through hole on the left mold 3 to ensure that the silicone rubber fits the mold body to form a silicone rubber core mold 5. After curing, the silicone rubber core mold 5 forms an integrated core mold with the left mold 3. Water-soluble sand is poured into the core mold through the straight-through hole on the left mold 3. The cured water-soluble sand, silicone rubber core mold 5 and left mold 3 form a water-soluble sand-silicone rubber core mold. The water-soluble sand-silicone rubber core mold is covered with multiple layers of carbon fiber prepreg. The upper mold 1 and the lower mold 2 are combined with the water-soluble sand-silicone rubber core mold, positioned with a φ10mm positioning pin and locked with a φ16mm bolt. Finally, the right mold 4 is blocked and tightened with bolts. The end of the right mold 4 is positioned and blocked on the end of the S-shaped part through the workbench to ensure the molding of the part's margin area. When in use, the water-soluble sand-silicone rubber core mold serves as the internal cavity reference of the part. When heated and expanded, the silicone rubber core exerts pressure on the inner wall of the mold tube, and is assisted by compressed air pressurization through the straight-through hole on the left mold 3. The upper and lower molds 1 and 2 ensure the part's shape, preventing deviations due to thermal expansion of the silicone rubber. They are ultimately positioned with locating pins and secured with bolts. The upper, lower, left, and right molds 1 and 2 are made of steel. A through-hole in the left mold 3 connects to compressed air, which is used for curing the silicone rubber and for auxiliary pressurization during soluble sand-silicone rubber molding, as well as for water injection during the dissolution of the soluble sand.

[0018] This embodiment can improve the molding quality of the inner and outer surfaces of the product. Since the water-soluble sand-silicone rubber not only has good elasticity and is easy to process, but the water-soluble sand in the core mold can be dissolved in water, it can be used to produce S-shaped products with complex curved surfaces. Compared with combined metal molds, this technology can effectively reduce mold manufacturing costs.

[0019] Example 2

[0020] The steps for using the mold of Example 1 are as follows:

[0021] Step 1: According to the thickness of the S-shaped part, wax sheets are laid in the inner cavity of the upper mold 1 and the lower mold 2, and positioned with positioning pins and locked with bolts. After the silicone rubber is cured, a silicone rubber core mold 5 is formed and a combined mold body is formed with the left mold 3.

[0022] Step 2: Disassemble the upper mold 1, lower mold 2, and right mold 4, and pour water-soluble sand through the straight hole on the left mold 3. After the water-soluble sand solidifies, lay carbon fiber prepreg cloth on the water-soluble sand-silicone rubber combined core mold, pre-clamp all modules to ensure that there is no cloth stuck, and finally position all modules with locating pins and tighten bolts to compact the parts.

[0023] Step 3: Place the entire mold into a curing oven and perform pressurized curing according to carbon fiber material specifications to finalize the part's shape.

[0024] Step 4: Release the pressure below 60℃, take the parts out of the oven, clean the excess glue, pull out the positioning pins with a pin puller, unscrew the bolts, inject water through the straight hole on the left mold 3, dissolve the water-soluble sand, and then demold the parts.

Claims

1. A water-soluble sand-silicone rubber mold for molding carbon fiber materials, comprising an upper mold (1), a lower mold (2), a left mold (3), a right mold (4) and a silicone rubber core mold (5), characterized in that: The inner cavities of the upper mold (1) and the lower mold (2) are two corresponding semicircular structured cavities designed according to the shape of the part, a silicone rubber core mold (5) designed according to the shape of the part is placed in the cavity, the right mold (4) is a flat plate sealing structure, the left mold (3) is a flat plate structure embedded with a straight through hole, the silicone rubber core mold (5) and the left mold (3) form an integrated core mold, water-soluble sand is poured into the silicone rubber core mold (5) through the straight through hole on the left mold (3), and the solidified water-soluble sand, silicone rubber core mold and left mold (3) form a water-soluble sand-silicone rubber core mold.

2. The water-soluble sand-silicone rubber mold for carbon fiber material molding according to claim 1, characterized in that: The upper mold (1), the lower mold (2) and the water-soluble sand-silicone rubber core mold are fixed together and are sealed and limited by the right mold (4).

3. The water-soluble sand-silicone rubber mold for carbon fiber material molding according to claim 1, characterized in that: The water-soluble sand-silicone rubber core mold is an integrated protruding workbench inner surface structure, which is used for forming the inner cavity of the part.

4. A water-soluble sand-silicone rubber mold for carbon fiber material molding according to any one of claims 1 to 3, characterized in that: The surface of the water-soluble sand-silicone rubber core mold is covered with carbon fiber prepreg cloth.

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