A special-shaped hollow cylinder forming tool

Abstract

The utility model discloses a tooling for forming a special-shaped hollow cylinder, the tooling comprising: an intermediate core mold; an upper core mold, a lower core mold, a left core mold and a right core mold respectively installed on the intermediate core mold, the molding surface of the upper core mold, the molding surface of the lower core mold, the molding surface of the left core mold and the molding surface of the right core mold are combined into a molding surface matching the inner surface of the special-shaped hollow cylinder; the upper core mold, the lower core mold, the left core mold and the right core mold are respectively connected to the intermediate core mold through a plug-in positioning piece; a front baffle, the front baffle is respectively connected to one end of the upper core mold, the lower core mold, the left core mold and the right core mold; a rear baffle, the rear baffle is respectively connected to the other end of the upper core mold, the lower core mold, the left core mold and the right core mold. The utility model can not only ensure that the inner surface of the composite material air intake part after curing is smooth and has no step difference, but also ensure that the mold can be quickly installed and disassembled for use.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material molding, and in particular relates to a special-shaped hollow cylinder molding tool. Background Art

[0002] Special-shaped hollow cylindrical parts such as air inlets have complex structures and have aerodynamic requirements for both inner and outer surfaces. The inner and outer surfaces are required to be smooth and flat, and the parts need to be formed in an integrated manner.

[0003] Some composite material intake duct molding molds use water-soluble molds. After the parts are formed, the molds are demolded by flushing with water. This type of water-soluble mold is a disposable mold, the manufacturing process is cumbersome, and the cycle is long, which is not suitable for mass production of parts.

[0004] Some composite material air intake molding molds are made of metal and adopt a core-mold combination structure. The core molds are positioned and connected by pins. After curing, when the pins are removed during demolding, the mold will release stress and deform. When the mold is installed again, gaps will appear between the core molds, resulting in core mold positioning deviations and thus step differences on the inner surface of the air intake product. In addition, demolding and mold closing require a long time, which is time-consuming and labor-intensive. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides a special-shaped hollow cylinder forming tool, which can ensure that the inner surface of the composite material intake duct part after curing is smooth and has no step difference, and can also ensure the rapid installation and disassembly of the mold.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] In a first aspect, a tooling for forming a special-shaped hollow cylinder is provided, comprising: an intermediate core mold; an upper core mold, a lower core mold, a left core mold and a right core mold respectively installed on the intermediate core mold, wherein the molding surface of the upper core mold, the molding surface of the lower core mold, the molding surface of the left core mold and the molding surface of the right core mold are combined into a molding surface matching the inner surface of the special-shaped hollow cylinder; the upper core mold, the lower core mold, the left core mold and the right core mold are respectively connected to the intermediate core mold through plug-in positioning parts; a front baffle, wherein the front baffle is respectively connected to one end of the upper core mold, the lower core mold, the left core mold and the right core mold; and a rear baffle, wherein the rear baffle is respectively connected to the other end of the upper core mold, the lower core mold, the left core mold and the right core mold.

[0008] Furthermore, the plug-in positioning member includes positioning plugs respectively mounted on the upper core mold, the lower core mold, the left core mold and the right core mold, and a positioning socket mounted on the middle core mold and matching with the positioning plugs.

[0009] Furthermore, the outer side surfaces of the upper core mold, the lower core mold, the left core mold and the right core mold are molding surfaces, and the inner side surfaces are respectively provided with a plurality of transverse ribs and longitudinal ribs, and an inner cavity is formed between the transverse ribs and the longitudinal ribs.

[0010] Furthermore, a mounting groove is provided in the inner cavity, and the positioning plug is installed in the mounting groove.

[0011] Furthermore, limiting grooves are provided on the transverse ribs and / or the longitudinal ribs.

[0012] Furthermore, the upper core mold, the lower core mold, the left core mold and the right core mold respectively adopt an integral structure or a segmented structure.

[0013] Furthermore, the middle core mold is provided with a plurality of slide grooves, and the depths of the slide grooves increase successively in the opposite direction to the demoulding direction.

[0014] Furthermore, the middle core mold is in a conical prism shape and is provided with a plurality of weight-reducing grooves; the contact surfaces of the upper core mold with the left core mold and the right core mold are respectively set as inclined surfaces, and the contact surfaces of the lower core mold with the left core mold and the right core mold are respectively set as inclined surfaces for easy demolding.

[0015] Furthermore, one end of the upper core mold, the lower core mold, the left core mold and the right core mold are respectively provided with a front groove matching the inner cavity of the front baffle; the other end of the upper core mold, the lower core mold, the left core mold and the right core mold are respectively provided with a rear groove matching the inner cavity of the rear baffle.

[0016] In a second aspect, a method for using the special-shaped hollow cylinder molding tooling described in the first aspect is provided, comprising: installing an upper core mold, a lower core mold, a left core mold, and a right core mold on a middle core mold respectively to form a molding surface that matches the inner surface of the special-shaped hollow cylinder, and installing a front baffle and a rear baffle; laying prepreg on the molding surface, and hot pressing to obtain a special-shaped hollow cylinder; removing the tooling in the special-shaped hollow cylinder, comprising: first removing the front baffle and the rear baffle; then pulling the middle core mold out of the special-shaped hollow cylinder along the demolding direction; then applying force to the upper core mold and the lower core mold in the direction of the middle core mold, and after the upper core mold and the lower core mold are loosened, pulling them out of the special-shaped hollow cylinder; finally, applying force to the left core mold and the right core mold in the direction of the middle core mold, and after the left core mold and the right core mold are loosened, pulling them out of the special-shaped hollow cylinder.

[0017] Compared with the prior art, the utility model achieves the following beneficial effects: the utility model is installed on the middle core mold through the upper core mold, the lower core mold, the left core mold and the right core mold, and the molding surfaces of the upper core mold, the lower core mold, the left core mold and the right core mold are combined into a molding surface matching the inner surface of the special-shaped hollow cylinder; the upper core mold, the lower core mold, the left core mold and the right core mold are respectively connected to the middle core mold through plug-in positioning parts; one end of the upper core mold, the lower core mold, the left core mold and the right core mold are connected to the front baffle, and the other end is connected to the rear baffle. By setting special tightenable plug-in positioning parts and front and rear baffles, the mold connection gap is tighter and the gap is smaller, thereby ensuring that the inner surface of the cured composite material air intake duct part is smooth and has no step difference, and the mold can be quickly installed and disassembled for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure after the tooling is assembled when a special-shaped hollow cylinder forming tooling provided by an embodiment of the utility model is used for air intake forming;

[0019] Figure 2 yes Figure 1 Exploded diagram of

[0020] Figure 3 is a schematic diagram of the tooling structure after the front baffle and the rear baffle are removed, wherein (a) is a front view, (b) is a right view of (a), (c) is a left view of (a), and (d) is an AA cross-sectional view of (c);

[0021] Figure 4 yes Figure 3 (c) Schematic diagram after removing the middle core mold;

[0022] Figure 5 Yes Figure 4 Schematic diagram after the inner cavity lines are hidden;

[0023] Figure 6 Schematic diagrams after the front baffle, the rear baffle, the middle core mold, the upper core mold and the lower core mold are removed, wherein (a) is a schematic diagram of the moving directions of the left core mold and the right core mold when they are separated from the air inlet, and (b) is a schematic diagram of the withdrawal directions of the left core mold and the right core mold when they are withdrawn from the air inlet;

[0024] Figure 7 Schematic diagrams of the structure of the upper core mold and the lower core mold, wherein (a1) is a schematic diagram of the outer side surface of the upper core mold, (a2) is a schematic diagram of the inner side surface of the upper core mold, and (a3) ​​is a schematic diagram of the planar structure of the inner side surface of the upper core mold; (b1) is a schematic diagram of the inner side surface of the lower core mold, (b2) is a schematic diagram of the outer side surface of the lower core mold, and (b3) is a schematic diagram of the planar structure of the inner side surface of the lower core mold;

[0025] Figure 8Schematic diagrams of the structure of the left core mold and the right core mold, wherein (a1) is a schematic diagram of the inner side of the left core mold, (a2) is a schematic diagram of the inner side after the front section of the left core mold is separated from the rear end of the left core mold, (a3) ​​is a schematic diagram of the outer side of the left core mold, and (a4) is a schematic diagram of the outer side after the front section of the left core mold is separated from the rear end of the left core mold; (b1) is a schematic diagram of the outer side of the right core mold, (b2) is a schematic diagram of the inner side of the right core mold, (b3) is a schematic diagram of the outer side after the front section of the right core mold is separated from the rear end of the right core mold, and (b4) is a schematic diagram of the inner side after the front section of the right core mold is separated from the rear end of the right core mold;

[0026] Fig. 9 Schematic diagram of the structure of the middle core mold, wherein (a) is a schematic diagram of the overall structure of the middle core mold, (b) is a front view of the middle core mold, and (c) is a top view of (b);

[0027] Fig.10 is a schematic diagram of the structure of the front baffle and the rear baffle, wherein (a1) is a front view of the front baffle, (a2) is a rear view of the front baffle, (b1) is a rear view of the rear baffle, and (b2) is a front view of the rear baffle;

[0028] In the figure: 10, upper core mold; 11, transverse ribs; 12, longitudinal ribs; 13, inner cavity; 14, mounting groove; 15, limiting groove; 16, front groove; 17, rear groove; 18, boundary surface of upper core mold; 20, lower core mold; 30, left core mold; 31, front section of left core mold; 32, rear section of left core mold; 40, right core mold; 50, middle core mold; 51, upper boundary of middle core mold; 52, lower boundary of middle core mold; 53, weight reduction groove; 54, slide groove; 55, deep slide groove; 60, front baffle; 61, front baffle groove; 62, pin hole; 63, countersunk hole; 70, rear baffle; 80, plug-in positioning piece; 90, air intake duct. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0030] Embodiment 1:

[0031] like Figure 1 to Figure 10 As shown, a special-shaped hollow cylinder forming tool includes: an upper core mold 10, a lower core mold 20, a left core mold 30, a right core mold 40, a middle core mold 50, a front baffle 60 and a rear baffle 70.

[0032] The upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 are respectively connected to the middle core mold 50 through the plug-in positioning piece 80; the molding surface of the upper core mold 10, the molding surface of the lower core mold 20, the molding surface of the left core mold 30 and the molding surface of the right core mold 40 are combined into a molding surface matching the inner surface of the special-shaped hollow cylinder.

[0033] The front baffle 60 is connected to one end of the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 respectively; the rear baffle 70 is connected to the other end of the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 respectively.

[0034] The following takes the molding process of the air intake duct as an example to further illustrate the specific structure and use method of the special-shaped hollow cylinder molding tool of the utility model. Figure 1~Figure 2 As shown, the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 are limited by the plug-in positioning piece 80, inserted into the groove of the rear baffle 70, and then the front baffle 60 is installed and fixed with screws respectively, so that the mold forms a molding surface that matches the inner surface of the air inlet duct, and the core molds of the mold fit together, and the outer surface (molding surface) of the mold is smooth without step difference.

[0035] The composite material is laid on the forming surface and hot-pressed to obtain the air intake duct cylinder.

[0036] The tooling in the air intake tube is removed, including: first removing the front baffle 60 and the rear baffle 70, and then applying an outward pulling force F to the middle core mold 50 on the side of the front baffle 60 拉 , applying an inward pressure F to the middle core mold 50 on the side of the rear baffle plate 70 压 Under the combined force, the middle core mold 50 slides out along the conical middle core mold upper boundary 51 and the middle core mold lower boundary 52 in the direction of the combined force. Figure 3 shown.

[0037] like Figure 4 , Figure 5 The figure shows the whole tooling after the middle core mold 50 is taken out. At this time, a force is applied to the middle core mold 50 at both ends of the upper core mold 10, and the upper core mold 10 is slid toward the center along the conical upper core mold boundary surface 18. After the upper core mold 10 is loosened, the upper core mold 10 is taken out in the direction of the front baffle 60. The lower core mold 20 is taken out in the same steps.

[0038] like Figure 6 As shown, at this time, the air inlet 90 formed by the composite material still has the left core mold 30 and the right core mold 40. After loosening the left and right core molds toward the center, the left core mold 30 and the right core mold 40 are taken out along the direction of the front baffle 60. In this way, a complete air inlet 90 can be obtained for subsequent processing.

[0039] The plug-in positioning member 80 includes positioning plugs respectively installed on the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40, and a positioning socket matched with the positioning plug installed on the middle core mold 50. The middle core mold 50 is connected to the positioning socket by screws, and the upper core mold 10, the lower core mold 20, the left core mold 30, and the right core mold 40 are connected to the positioning plug by screws, and the screws do not need to be removed when demolding. The middle core mold 50 connected to the positioning socket is fixed, and the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 connected to the positioning plug are translated and slid to connect the positioning plug with the positioning socket.

[0040] like Figure 7 As shown, the outer side surface of the upper core mold 10 is a continuous curved surface that matches the corresponding position of the inner surface of the air inlet 90, and the inner side surface includes transverse ribs 11 and longitudinal ribs 12, and an inner cavity 13 is formed between the ribs for weight reduction. There is a mounting groove 14 in the inner cavity 13, and the positioning plug is installed in the mounting groove 14 for positioning and assembly between the core molds. There is a limiting groove 15 on the core mold rib, which is used for positioning, fixing and hoisting during core mold processing. The front groove 16 is installed in conjunction with the inner cavity of the front baffle 60, and each core mold except the middle core mold 50 is inserted into the inner cavity of the front baffle 60 with the front groove 16 for fixing. The rear groove 17 is installed in conjunction with the inner cavity of the rear baffle 70, and each core mold except the middle core mold 50 is inserted into the inner cavity of the rear baffle 70 with the rear groove 17 for fixing. The boundary surfaces 18 of the upper core molds on both sides present conical inclined surfaces to facilitate the disassembly of the core mold. The lower core mold 20 has a similar structure to the upper core mold 10 and has the same function.

[0041] like Figure 8 As shown, the outer side surface of the left core mold 30 is a continuous curved surface that matches the corresponding position of the inner surface of the air inlet 90, including the left core mold front section 31 and the left core mold rear section 32, which are processed in sections to reduce the difficulty of processing. The inner side of the left core mold 30 is formed with a transverse rib 11 and a longitudinal rib 12 to form an inner cavity 13 for weight reduction. There are two mounting grooves 14 in the inner cavity 13, and the positioning plug is installed in the mounting groove 14 for positioning and assembly between core molds. The limiting groove on the core mold rib is used for positioning, fixing and hoisting during core mold processing. The front groove 16 has the same function as the front groove of the upper core mold, and is used to insert the front baffle 60 into the inner cavity for fixing. The rear groove 17 has the same function as the rear groove of the upper core mold, and is used to insert the rear baffle 70 into the inner cavity for fixing. The right core mold 40 has a similar structure to the left core mold 30 and has the same function.

[0042] like Fig. 9As shown, the middle core mold 50 has a conical prism shape and includes multiple weight-reducing grooves 53. The upper boundary 51 of the middle core mold, the lower boundary 52 of the middle core mold, and the left and right boundaries are all inclined to facilitate demolding. There are six installation grooves 14 on the middle core mold 50, and positioning sockets are installed in the grooves. On the rear side of the positioning socket, in the direction opposite to the demolding direction, a slide groove 54 and a deep slide groove 55 are provided on the middle core mold 50 to avoid sliding interference with the positioning plugs on the upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40. Among them, the deep slide groove 55 is deeper than the slide groove 54, because the installation depth of the positioning sockets in the direction opposite to the demolding direction increases successively to avoid sliding interference with each other.

[0043] like Fig.10 As shown, the front baffle 60 is in a round shape, with a front baffle groove 61 (matching with the front position groove 16) inside, and is embedded and installed with the core module. The installation is positioned by the pin hole 62, and the hexagon socket round head screw is installed by the countersunk hole 63. The rear baffle 70 is similar in structure to the front baffle 60 and has the same function.

[0044] The connection between the core molds of the utility model is made by means of positioning plugs and positioning sockets, so that the upper, lower, left and right core molds are more closely fitted on the middle core mold, so that each core mold is not easy to deform, and the inner wall of the air inlet product is not easy to have a step difference. The application of positioning plugs and positioning sockets reduces the mold clearance caused by bending of the mold, ensuring the smoothness of the inner surface of the air inlet. The removal of pins between the core molds is reduced during demoulding and mold closing, reducing labor costs.

[0045] Embodiment 2:

[0046] Based on the special-shaped hollow cylinder forming tool described in the first embodiment, this embodiment provides a method for using the special-shaped hollow cylinder forming tool, including:

[0047] The upper core mold 10, the lower core mold 20, the left core mold 30 and the right core mold 40 are respectively installed on the middle core mold 50 to form a molding surface matching the inner surface of the special-shaped hollow cylinder, and the front baffle 60 and the rear baffle 70 are installed;

[0048] The prepreg is laid on the molding surface and hot-pressed to obtain a special-shaped hollow cylinder;

[0049] Dismantle the tooling inside the special-shaped hollow cylinder, including:

[0050] First remove the front baffle 60 and the rear baffle 70;

[0051] Then the middle core mold 50 is pulled out from the special-shaped hollow cylinder along the demoulding direction;

[0052] Then, the upper core mold 10 and the lower core mold 20 are respectively applied to the direction of the middle core mold 50, and after the upper core mold 10 and the lower core mold 20 are loosened, they are pulled out from the special-shaped hollow cylinder;

[0053] Finally, the left core mold 30 and the right core mold 40 are respectively forced toward the middle core mold 50 , and after the left core mold 30 and the right core mold 40 are loosened, they are pulled out from the special-shaped hollow cylinder.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tool for forming a special-shaped hollow cylinder, characterized in that: include: Intermediate core mold (50); An upper core mold (10), a lower core mold (20), a left core mold (30) and a right core mold (40) are respectively mounted on the middle core mold (50); the molding surface of the upper core mold (10), the molding surface of the lower core mold (20), the molding surface of the left core mold (30) and the molding surface of the right core mold (40) are combined to form a molding surface matching the inner surface of the special-shaped hollow cylinder; the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) are respectively connected to the middle core mold (50) via a plug-in positioning piece (80); A front baffle (60), the front baffle (60) being connected to one end of the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) respectively; A rear baffle (70) is connected to the other ends of the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) respectively.

2. The special-shaped hollow cylinder forming tool according to claim 1, characterized in that: The plug-in positioning member (80) comprises positioning plugs respectively mounted on the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40), and a positioning socket mounted on the middle core mold (50) and matching with the positioning plugs.

3. The special-shaped hollow cylinder forming tool according to claim 2, characterized in that: The outer side surfaces of the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) are respectively molding surfaces, and the inner side surfaces are respectively provided with a plurality of transverse ribs (11) and longitudinal ribs (12), and an inner cavity (13) is formed between the transverse ribs (11) and the longitudinal ribs (12).

4. The special-shaped hollow cylinder forming tool according to claim 3, characterized in that: A mounting groove (14) is provided in the inner cavity (13), and the positioning plug is mounted in the mounting groove (14).

5. The special-shaped hollow cylinder forming tool according to claim 3, characterized in that: Limiting grooves (15) are provided on the transverse ribs (11) and / or the longitudinal ribs (12).

6. The special-shaped hollow cylinder forming tool according to claim 2, characterized in that: The upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) respectively adopt an integral structure or a segmented structure.

7. The tooling for forming a special-shaped hollow cylinder according to claim 6, characterized in that: The middle core mold (50) is provided with a plurality of slide grooves, and the depths of the slide grooves increase sequentially in the direction opposite to the demoulding direction.

8. The tooling for forming a special-shaped hollow cylinder according to claim 2, characterized in that: The middle core mold (50) is in the shape of a conical prism and is provided with a plurality of weight-reducing grooves (53); the contact surfaces of the upper core mold (10) and the left core mold (30) and the right core mold (40) are respectively arranged as inclined surfaces; and the contact surfaces of the lower core mold (20) and the left core mold (30) and the right core mold (40) are respectively arranged as inclined surfaces, so as to facilitate demoulding.

9. The tooling for forming a special-shaped hollow cylinder according to claim 1, characterized in that: One end of the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) is respectively provided with a front groove (16) matching the inner cavity of the front baffle plate (60); the other end of the upper core mold (10), the lower core mold (20), the left core mold (30) and the right core mold (40) is respectively provided with a rear groove (17) matching the inner cavity of the rear baffle plate (70).

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