Helicopter diaphragm mold and forming method

Abstract

The invention relates to a helicopter diaphragm mold and a forming method, and relates to the field of diaphragm manufacturing, the helicopter diaphragm mold comprises a mold shell and a mold core, the mold shell is internally provided with a cavity, the mold core is detachably connected with the mold shell and located in the cavity, the mold core and the cavity are coaxially arranged, and one end of the mold shell is provided with at least one injection hole communicated with the cavity. The mold has the beneficial effects that when the mold is used, the mold core is fixed in the cavity, the mold core of the mold can be accurately and fixedly arranged in the middle of the spherical surface, materials are injected from the material injection holes, and it is ensured that rubber compound is evenly distributed around the mold core, so that it is ensured that the mold cavity of the mold is well filled with the rubber compound, and it is ensured that the wall thickness of a diaphragm is even.

Description

Technical Field

[0001] The invention relates to the field of diaphragm manufacturing, and in particular to a helicopter diaphragm mold and a molding method. Background Art

[0002] The hydraulic system of a certain imported helicopter features a crucial component: the accumulator. The accumulator's function is to store and discharge high-pressure oil, ensuring the coordinated and stable operation of the hydraulic system. The accumulator plays a crucial role in the hydraulic system, and the diaphragm inside the accumulator plays a key role. Over the past three years, frequent product failures have been caused by diaphragm eccentricity within the accumulator.

[0003] Currently, diaphragms are manufactured by first injecting raw material into the mold cavity, then placing the core into the cavity, and then closing the mold. Under the same repair conditions, the unstable position of the core leads to uneven wall thickness of the pressure accumulator ball diaphragms, resulting in poor product precision and consistency. This results in a short service life or inability to fully meet user requirements, resulting in unnecessary waste. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to ensure the uniformity of the diaphragm wall thickness.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a helicopter diaphragm mold, comprising a mold shell and a mold core, the mold shell having a cavity, the mold core being detachably connected to the mold shell and located in the cavity, the mold core being coaxially arranged with the cavity, and one end of the mold shell having at least one injection hole connected to the cavity.

[0006] The beneficial effects of the present invention are as follows: when the mold is in use, the mold core is fixed in the mold cavity, the mold core can be accurately positioned in the middle part of the spherical surface, and the material is injected from the injection hole to ensure that the mixed rubber is evenly distributed around the mold core, thereby ensuring that the mixed rubber fills the mold cavity well, thereby ensuring the uniform thickness of the diaphragm wall.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the mold shell includes an upper mold, a middle mold and a lower mold that are sealed and detachably connected in sequence.

[0009] The beneficial effect of adopting the above further solution is that the mold shell is divided into three parts, which facilitates the demoulding of the spherical shell-shaped diaphragm.

[0010] Furthermore, the upper mold has a hemispherical upper mold cavity at one end facing the middle mold, the middle mold has a spherical middle mold cavity inside, and the lower mold has an annular groove-shaped lower mold cavity at one end facing the middle mold. The upper mold cavity, the middle mold cavity and the lower mold cavity enclose the mold cavity.

[0011] Furthermore, the upper mold has the injection hole, and the injection hole is located at the bottom of the hemispherical upper mold cavity; the end of the upper mold facing away from the middle mold has an arc-shaped material containing cavity, and the injection hole is connected to the material containing cavity.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the injection hole is located at the bottom of the hemispherical upper mold cavity, and the material can be evenly distributed in the cavity after flowing into the cavity. The arc-shaped material receiving cavity allows the material to be temporarily stored in the material receiving cavity during injection, and then gradually flows into the cavity along the injection hole.

[0013] Furthermore, the helicopter diaphragm mold also includes an injection cover, which is sealed and detachably connected to the upper mold, and there is a gap between the injection cover and the material holding cavity.

[0014] Furthermore, the helicopter diaphragm mold also includes a bolt, the mold core has a demolding hole, one end of the demolding hole is connected to the mold cavity, and the other end is connected to the outside of the membrane shell through the lower mold, and the screw of the bolt passes through the lower mold and is threadedly connected to one end of the demolding hole.

[0015] The above further solution has the following advantages: the core is fixed to the lower mold with bolts, facilitating accurate positioning of the core before pouring. After the diaphragm solidifies, the bolts are removed and gas is injected into the mold cavity through the demolding hole to separate the diaphragm from the core and facilitate demolding.

[0016] Furthermore, the helicopter diaphragm mold also includes a core head, which is in the shape of a stepped shaft. The small diameter end of the core head is inserted into the mold core, the large diameter end of the core head is embedded in the lower mold, and the end face of the large diameter end of the core head is abutted against the mold core, and the bolt head of the bolt is abutted and embedded in the core head.

[0017] The beneficial effect of adopting the above further solution is that the small diameter end of the core head is inserted into the core, thereby positioning the core together with the bolt.

[0018] Furthermore, the mold core is spherical, and its outer wall has an annular molding groove coaxially arranged with the mold cavity.

[0019] The beneficial effect of adopting the above further solution is that the mold core is provided with an annular molding groove, thereby forming an annular protruding structure on the inner wall of the diaphragm.

[0020] Furthermore, a weight-reducing cavity is provided in the mold core.

[0021] The beneficial effects of adopting the above further solution are: providing a weight-reducing cavity, reducing the weight of the mold core, and facilitating the disassembly and assembly of the mold.

[0022] The present invention also provides a helicopter diaphragm forming method, which is implemented using the helicopter diaphragm mold, and includes the following steps: Fixing the mold core in the mold cavity and arranging it coaxially with the mold cavity; Pour the raw material into the cavity through the injection hole; After the raw material solidifies to form a diaphragm, the mold shell is disassembled and the diaphragm is removed from the cavity.

[0023] The beneficial effect is that in the molding method of the present invention, the mold core is first fixed, and then the diaphragm is manufactured by injection molding to ensure the uniformity of the diaphragm wall thickness, thereby ensuring the stability of the diaphragm working performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of a helicopter diaphragm mold of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Injection cap; 2. Upper mold; 3. Injection hole; 4. Mold core; 41. Annular molding groove; 5. Middle mold; 6. Lower mold; 7. Bolt; 8. Mold core head. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] Example 1 like Figure 1 As shown, this embodiment provides a helicopter diaphragm mold, including a mold shell and a mold core 4, wherein the mold shell has a mold cavity, the mold core 4 is detachably connected to the mold shell and is located in the mold cavity, the mold core 4 is coaxially arranged with the mold cavity, and one end of the mold shell has at least one injection hole 3 connected to the mold cavity.

[0028] When the mold is in use, the mold core 4 is fixed in the mold cavity, and the mold core can be accurately positioned in the middle of the spherical surface. Material is injected from the injection hole 3 to ensure that the mixed rubber is evenly distributed around the mold core, thereby ensuring that the mixed rubber fills the mold cavity well, thereby ensuring uniform thickness of the diaphragm wall.

[0029] Preferably, a plurality of injection holes 3 are evenly spaced apart.

[0030] On the basis of the above technical solution, the mold shell includes an upper mold 2, a middle mold 5 and a lower mold 6 which are sealed and detachably connected in sequence.

[0031] The mold shell is divided into three parts to facilitate demoulding of the spherical shell-shaped diaphragm.

[0032] Specifically, such as Figure 1As shown, the upper mold 2 has an upper mold countersunk hole on the end facing the middle mold 5, and the middle mold 5 has a middle mold protrusion on the end facing the upper mold 2. The upper mold countersunk hole and the middle mold protrusion are plugged into each other, and a first sealing groove with a sealing ring embedded in it is provided at the contact surface between the upper mold 2 and the middle mold 5 (at least one of the upper mold 2 and the middle mold 5 has a first sealing groove). A gasket is also sleeved on the outside of the middle mold protrusion and is sandwiched between the middle mold 5 and the upper mold 2.

[0033] Specifically, the middle mold 5 has a middle mold positioning groove on one end facing the lower mold 6, and the lower mold 6 has a lower mold positioning protrusion on the other end facing the middle mold 5, which is inserted into the middle mold positioning groove. The contact surfaces of the middle mold 5 and the lower mold 6 are both provided with a second sealing groove with an embedded sealing ring.

[0034] The arrangement of the upper die countersunk hole, the middle die protrusion, the lower die positioning protrusion and the middle die positioning groove enables the upper die 2, the middle die 5 and the lower die 6 to be accurately positioned when assembled in pairs, and ensures sealing.

[0035] Based on the above technical solution, the upper mold 2 has a hemispherical upper mold cavity at one end facing the middle mold 5, the middle mold 5 has a spherical middle mold cavity, and the lower mold 6 has an annular groove-shaped lower mold cavity at one end facing the middle mold 5. The upper mold cavity, the middle mold cavity and the lower mold cavity enclose the mold cavity.

[0036] Specifically, through the structural design of the upper mold cavity, the middle mold cavity and the lower mold cavity, a spherical shell-shaped diaphragm structure with one end open can be obtained. The upper mold cavity, the middle mold cavity and the lower mold cavity are coaxially arranged, and the spherical radii of the upper mold cavity and the middle mold cavity are the same.

[0037] Based on the above technical solution, the upper mold 2 has the injection hole 3, and the injection hole 3 is located at the bottom of the hemispherical upper mold cavity; the end of the upper mold 2 facing away from the middle mold 5 has an arc-shaped material receiving cavity, and the injection hole 3 is connected to the material receiving cavity.

[0038] The injection hole 3 is located at the bottom of the hemispherical upper mold cavity. After the material flows into the cavity, it can be evenly distributed in the cavity. The arc-shaped material holding cavity allows the material to be temporarily stored in the material holding cavity during injection, and then gradually flow into the cavity along the injection hole 3.

[0039] On the basis of the above technical solution, the helicopter diaphragm mold further includes an injection cover 1, which is sealed and detachably connected to the upper mold 2, and there is a gap between the injection cover 1 and the material holding cavity.

[0040] Specifically, such as Figure 1 As shown, the end of the injection cap 1 facing the upper mold 2 has a spherical cap protrusion, which is located within the material receiving cavity with a gap between the cap and the cavity. The cap protrusion also has a cap boss circumferentially, and the upper mold 2 has a cap assembly countersunk hole that mates with the cap boss.

[0041] On the basis of the above technical solution, the helicopter diaphragm mold also includes a bolt 7, the mold core 4 has a demolding hole, one end of the demolding hole is connected to the mold cavity, and the other end is connected to the outside of the membrane shell through the lower mold 6, and the screw of the bolt 7 passes through the lower mold 6 and is threadedly connected to one end of the demolding hole.

[0042] The core 4 is fixed to the lower mold 6 by bolts 7, which facilitates accurate positioning of the core 4 before pouring. After the diaphragm is solidified, the bolts 7 are unscrewed and gas is injected into the cavity through the demoulding hole to separate the diaphragm from the core 4 and facilitate demoulding.

[0043] On the basis of the above technical solution, the helicopter diaphragm mold also includes a core head 8, which is in the shape of a stepped shaft. The small diameter end of the core head 8 is inserted into the core 4, and the large diameter end of the core head 8 is embedded in the lower mold 6. The end face of the large diameter end of the core head 8 (that is, the step of the stepped shaft, the connection between the large diameter end and the small diameter end) is in contact with the core 4, and the bolt head of the bolt 7 is in contact with and embedded in the core head 8.

[0044] The small diameter end of the core head 8 is inserted into the core 4 , thereby positioning the core 4 together with the bolt 7 .

[0045] Optionally, the core head 8 is fixedly connected to the lower mold 6, detachably connected, or integrally formed.

[0046] On the basis of the above technical solution, the mold core 4 is spherical, and its outer wall has an annular molding groove 41 coaxially arranged with the mold cavity.

[0047] The mold core 4 is provided with an annular molding groove 41 , thereby forming an annular convex structure on the inner wall of the diaphragm.

[0048] On the basis of the above technical solution, a weight-reducing cavity is provided in the mold core 4 .

[0049] A weight-reducing cavity is provided to reduce the weight of the mold core 4 and facilitate the disassembly and assembly of the mold.

[0050] Example 2 This embodiment also provides a helicopter diaphragm molding method, which is implemented using the helicopter diaphragm mold, and includes the following steps: Fixing the mold core 4 in the mold cavity and setting it coaxially with the mold cavity; Pour the raw material into the cavity through the injection hole 3; After the raw material solidifies to form a diaphragm, the mold shell is disassembled and the diaphragm is removed from the cavity.

[0051] The beneficial effect is that in the molding method of the present invention, the mold core is first fixed, and then the diaphragm is manufactured by injection molding to ensure the uniformity of the diaphragm wall thickness, thereby ensuring the stability of the diaphragm working performance.

[0052] In one specific example, the molding method specifically includes: Assemble the upper mold 2, the middle mold 5 and the lower mold 6 from top to bottom. During the assembly process, the mold core 4 is fixed to the mold core head 8 by bolts 7, and the mold core 4 is located in the mold cavity and is coaxially arranged with the mold cavity; The raw material is poured into the material cavity of the upper mold 2, and the injection cover 1 is covered. The raw material is squeezed into the mold cavity from the injection hole 3 by the injection cover 1; After the raw material solidifies to form a diaphragm, first remove the bolts 7 and inject gas into the demoulding hole to separate the diaphragm from the mold core 4; then disassemble the mold shell and remove the diaphragm from the cavity.

[0053] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0055] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0056] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0057] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. 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 helicopter diaphragm mold, characterized in that: The mold shell comprises a mold shell and a mold core (4), wherein the mold shell has a mold cavity, the mold core (4) is detachably connected to the mold shell and is located in the mold cavity, the mold core (4) is coaxially arranged with the mold cavity, and one end of the mold shell has at least one injection hole (3) connected to the mold cavity.

2. A helicopter diaphragm mold according to claim 1, characterized in that: The mold shell comprises an upper mold (2), a middle mold (5) and a lower mold (6) which are sealed and detachably connected in sequence.

3. A helicopter diaphragm mold according to claim 2, characterized in that: The upper mold (2) has a hemispherical upper mold cavity at one end facing the middle mold (5), the middle mold (5) has a spherical middle mold cavity inside, and the lower mold (6) has a ring-shaped lower mold cavity at one end facing the middle mold (5). The upper mold cavity, the middle mold cavity and the lower mold cavity enclose the mold cavity.

4. A helicopter diaphragm mold according to claim 3, characterized in that: The upper mold (2) has the injection hole (3), and the injection hole (3) is located at the bottom of the hemispherical upper mold cavity; the end of the upper mold (2) facing away from the middle mold (5) has an arc-shaped material containing cavity, and the injection hole (3) is connected to the material containing cavity.

5. A helicopter diaphragm mold according to claim 4, characterized in that: It also includes an injection cover (1), which is sealed and detachably connected to the upper mold (2), and a gap is provided between the injection cover (1) and the material holding cavity.

6. The helicopter diaphragm mold according to claim 2, characterized in that: It also includes a bolt (7), the mold core (4) has a demoulding hole, one end of the demoulding hole is connected to the mold cavity, and the other end is connected to the outside of the membrane shell through the lower mold (6), and the screw of the bolt (7) passes through the lower mold (6) and is threadedly connected to one end of the demoulding hole.

7. The helicopter diaphragm mold according to claim 6, characterized in that: It also includes a core head (8), which is in the shape of a stepped shaft. The small diameter end of the core head (8) is inserted into the core (4), and the large diameter end of the core head (8) is embedded in the lower mold (6). The end face of the large diameter end of the core head (8) is in contact with the core (4), and the bolt head of the bolt (7) is in contact with and embedded in the core head (8).

8. The helicopter diaphragm mold according to claim 1, characterized in that: The mold core (4) is spherical, and its outer wall has an annular molding groove (41) coaxially arranged with the mold cavity.

9. A helicopter diaphragm mold according to any one of claims 1 to 8, characterized in that: The mold core (4) has a weight-reducing cavity therein.

10. A helicopter diaphragm forming method, characterized in that: The method is implemented by using the helicopter diaphragm mold according to any one of claims 1 to 9, comprising the following steps: The mold core (4) is fixed in the mold cavity and arranged coaxially with the mold cavity; pouring raw material into the mold cavity through the injection hole (3); After the raw material solidifies to form a diaphragm, the mold shell is disassembled and the diaphragm is removed from the cavity.

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