Reducing cylinder winding forming die convenient to disassemble

Abstract

The utility model provides a diameter-variable cylinder winding forming die convenient to disassemble, which belongs to the technical field of composite material forming and comprises a mandrel and a diameter-variable cylinder, the diameter-variable cylinder is detachably sleeved on the mandrel and comprises a left-end inner cylinder, a right-end inner cylinder and a middle-protruding combined petal die, and the left-end inner cylinder, the right-end inner cylinder and the middle-protruding combined petal die are detachably sleeved on the mandrel. The middle protruding combined petal die comprises at least two petal die bodies and is detachably arranged between the left end inner cylinder and the right end inner cylinder, and locking nuts are arranged on the sides, opposite to each other, of the left end inner cylinder and the right end inner cylinder. The left end inner cylinder, the middle protruding combined petal die and the right end inner cylinder are locked through locking nuts. According to the mold, the stress environment of the variable-diameter cylinder is optimized, the demolding rate of a product is increased, and the overall structure of the mold is a hollow structure supported by a shaft piece, so that the weight is reduced, the use of materials is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of composite material molding technology, specifically to a variable diameter cylinder winding molding die that is easy to disassemble. Background Technology

[0002] In recent years, high-performance fiber materials, with their high specific strength, high specific modulus, and strong designability, have gradually become important structural materials for high-end applications in aerospace, defense, and energy storage. This has made fiber winding a crucial molding process in fiber composite material fabrication. Fiber winding involves using winding equipment to wind continuous fibers (such as fabric tape or prepreg yarn) impregnated with resin onto a mandrel according to a specific pattern. After curing and demolding, the finished product is obtained.

[0003] With the advancement of large-scale production, integrated variable-diameter cylindrical winding molds often encounter problems such as difficulty in demolding and product damage after the fiber composite material is wound and cured. These problems arise due to various loads applied to the mold surface by the product. Integrated variable-diameter cylindrical winding molds are far from meeting design and production needs. To reduce mold weight, improve product demolding speed, ensure product quality, and reduce production costs, there is an urgent need to design and develop a variable-diameter cylindrical winding mold that meets performance requirements and is easy to disassemble and assemble. Utility Model Content

[0004] The purpose of this invention is to provide a variable diameter cylinder winding molding die that is easy to disassemble, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a detachable variable diameter cylinder winding molding die, including a mandrel and a variable diameter cylinder. The variable diameter cylinder is detachably sleeved on the mandrel. The variable diameter cylinder includes a left inner cylinder, a right inner cylinder, and a middle protruding combined petal mold. The middle protruding combined petal mold includes at least two petal molds. The middle protruding combined petal mold is detachably disposed between the left inner cylinder and the right inner cylinder. Locking nuts are provided on opposite sides of the left inner cylinder and the right inner cylinder. The left inner cylinder, the middle protruding combined petal mold, and the right inner cylinder are locked by the locking nuts.

[0007] Furthermore, the intermediate protrusion combined valve mold includes a first large valve mold, a second large valve mold, a first small valve mold, and a second small valve mold. One end of the first large valve mold and one end of the second large valve mold are movably connected through the first small valve mold, and the other end of the first large valve mold and the other end of the second large valve mold are movably connected through the second small valve mold.

[0008] Furthermore, both the left-end inner cylinder and the right-end inner cylinder include an outer end cap, an inner end cap, and a cylinder shell. The outer end cap is fixedly disposed at one end of the cylinder shell, and the inner end cap is fixedly disposed at the other end of the cylinder shell.

[0009] Furthermore, the inner end cap is provided with a V-shaped groove along the circumference on the side where it connects to the middle protrusion combined petal mold, and the two end faces of the middle protrusion combined petal mold are provided with inclined mounting protrusions that cooperate with the V-shaped groove.

[0010] Furthermore, both the outer and inner end caps are provided with several through holes along the axial direction of the mandrel.

[0011] Furthermore, the mandrel is a second-order shaft, and a second-order shaft thread section is provided on the outer side of the second-order shaft, and the locking nut cooperates with the second-order shaft thread section.

[0012] Compared with the prior art, the present invention has the following technical effects:

[0013] 1. In this utility model, the variable diameter cylinder is composed of a left-end inner cylinder, a right-end inner cylinder, and a middle protruding combined mold. It can be spliced ​​and disassembled by a mandrel. The cooperation between the middle protruding combined mold and the left-end inner cylinder and the right-end inner cylinder is used for axial and radial positioning of the product. This improves the tightness between the mold surface and the composite material, ensures the integrity and stability of the surface of the wound product, improves the overall strength of the product, optimizes the stress environment of the variable diameter cylinder, makes the demolding operation simple and convenient, and improves the demolding rate of the product.

[0014] 2. In this utility model, through holes are provided on the outer and inner end caps of the left and right inner cylinders. In addition, the overall structure of this mold is a hollow structure supported by shafts, which greatly reduces the weight of the mold itself, reduces the use of materials, and lowers production costs. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the winding molding die according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the mandrel structure according to an embodiment of the present utility model;

[0017] Figure 3 This is a front view of the combined petal mold with the central protrusion in an embodiment of the present utility model;

[0018] Figure 4 This is a side view of the central protrusion combined petal mold according to an embodiment of the present utility model;

[0019] Figure 5 This is a cross-sectional view of the left end inner cylinder of an embodiment of the present utility model;

[0020] Figure 6 This is a cross-sectional view of the inner cylinder at the right end of an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Locking nut; 2. Left inner cylinder; 3. Right inner cylinder; 4. Outer end cap; 5. Inner end cap; 6. Outer shell of the cylinder; 7. V-groove; 8. Through hole; 9. Middle protruding combined petal mold; 91. First large petal mold; 92. Second large petal mold; 93. First small petal mold; 94. Second small petal mold; 10. Mandrel; 101. First-stage shaft; 102. Second-stage shaft; 103. Threaded section of the second-stage shaft. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 6 This embodiment provides a detachable variable diameter cylinder winding molding die, including a mandrel 10, a locking nut 1 mounted on the mandrel 10, and a variable diameter cylinder. The variable diameter cylinder is detachably sleeved on the mandrel 10. The locking nuts 1 are located at both ends of the variable diameter cylinder and are used for axial positioning of the variable diameter cylinder. The variable diameter cylinder includes a left inner cylinder 2, a right inner cylinder 3, and a middle protruding combined petal mold 9. The middle protruding combined petal mold 9 is detachably disposed between the left inner cylinder 2 and the right inner cylinder 3. Locking nuts 1 are provided on the outer sides of both the left inner cylinder 2 and the right inner cylinder 3. The left inner cylinder 2, the middle protruding combined petal mold 9, and the right inner cylinder 3 are locked together by the locking nuts 1. The variable-diameter cylinder of this mold can be spliced ​​and disassembled through the mandrel 10. Through the cooperation of the middle protruding combined petal mold 9 with the left end inner cylinder 2 and the right end inner cylinder 3, the product can be axially and radially positioned, which improves the tightness between the mold surface and the composite material, ensures the integrity and stability of the surface of the wound product, improves the overall strength of the product, optimizes the stress environment of the variable-diameter cylinder, makes the product demolding operation simple and convenient, and improves the product demolding rate.

[0024] Specifically, the intermediate protruding combined petal mold 9 includes at least two petal molds, facilitating diameter variation. The effect achieved by this mold through diameter variation is the same as that achieved by existing one-piece diameter-variable cylinder winding molding molds. The intermediate protruding combined petal mold 9 can be made of a high-strength alloy. In this embodiment, as... Figure 3 and Figure 4As shown, the central raised combined petal mold 9 consists of two large petal molds and two small petal molds, including a first large petal mold 91, a second large petal mold 92, a first small petal mold 93, and a second small petal mold 94. One end of the first large petal mold 91 is movably connected to one end of the second large petal mold 92 through the first small petal mold 93, and the other end of the first large petal mold 91 is movably connected to the other end of the second large petal mold 92 through the second small petal mold 94. When a diameter change is required, the operator first tightens the locking nut 1 outward, loosening the pressure of the left inner cylinder 2 and the right inner cylinder 3 on the central raised combined petal mold 9. Then, the operator moves the four petal molds that make up the central raised combined petal mold 9 in the radial direction of the mandrel 10. After adjustment, the operator tightens the locking nut 1 inward, making the left inner cylinder 2, the right inner cylinder 3, and the adjusted central raised combined petal mold 9 tightly joined together.

[0025] Specifically, such as Figure 2 As shown, the mandrel 10 is a second-order shaft, including a first-order shaft 101 and a second-order shaft 102. The outer side of the second-order shaft 102 is provided with a second-order shaft thread section 103. The locking nut 1 cooperates with the second-order shaft thread section 103. The locking nut 1 is used to adjust the axial position of the variable diameter cylinder in the mandrel 10.

[0026] Specifically, both the left-end inner cylinder 2 and the right-end inner cylinder 3 include an outer end cap 4, an inner end cap 5, and a cylinder shell 6. The outer end cap 4 is fixedly installed at one end of the cylinder shell 6, and the inner end cap 5 is fixedly installed at the other end of the cylinder shell 6. When the left-end inner cylinder 2 and the right-end inner cylinder 3 are installed on the mandrel 10, the center hole on the outer end cap 4 is fitted onto the second-stage shaft 102 of the mandrel 10, and the center hole on the inner end cap 5 is fitted onto the first-stage shaft 101 of the mandrel 10. The side of the inner end cap 5 that connects with the intermediate protruding combined petal mold 9 has a V-groove 7 circumferentially provided. The two end faces of the intermediate protruding combined petal mold 9 have inclined mounting protrusions that cooperate with the V-groove 7. The intermediate protruding combined petal mold 9 is installed between the left-end inner cylinder 2 and the right-end inner cylinder 3 through the mounting protrusions and the V-groove 7. The intermediate protruding combined petal mold 9 is tightly spliced ​​with the left-end inner cylinder 2 and the right-end inner cylinder 3 by tightening the locking nut 1.

[0027] Specifically, the lengths of the left inner cylinder 2 and the right inner cylinder 3 can be made longer or shorter during manufacturing according to actual needs. This mold controls the length of the product through the left inner cylinder 2 and the right inner cylinder 3.

[0028] Specifically, the outer end cap 4 and inner end cap 3 of the left inner cylinder 2 and the right inner cylinder 3 are each provided with several through holes 8 along the axial direction of the mandrel 10, which helps to reduce the overall weight of the mold. In addition, the overall structure of this mold is a hollow structure supported by shafts, which greatly reduces the weight of the mold itself, reduces the use of materials and lowers production costs during the manufacturing of this mold.

[0029] When using the mold of this utility model to prepare the product, the steps are as follows:

[0030] Step 1: Install the left inner cylinder 2 and the right inner cylinder 3. Install the left inner cylinder 2 and the right inner cylinder 3 onto the mandrel 10, assemble the outer end 4 with the second-stage shaft 102, and assemble the inner end 5 with the first-stage shaft 101.

[0031] Step 2: Install the middle raised combination petal mold 9. Install the four petal molds that make up the middle raised combination petal mold 9 into the V-groove 7 of the left inner cylinder 2 and the right inner cylinder 3. Tighten the locking nut 1 to tighten the middle raised combination petal mold 9 and the left inner cylinder 2 and the right inner cylinder 3.

[0032] Step 3: Wet-wind carbon fiber onto the outer wall of the mold to create a composite material cylinder;

[0033] Step 4: After the composite material cylinder has cured and formed, remove the left inner cylinder 2, the right inner cylinder 3, the middle protruding combination mold 9 and the mandrel 10 in sequence to obtain the final product.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A variable diameter cylinder winding molding die that is easy to disassemble, characterized in that, The device includes a mandrel (10) and a variable diameter cylinder. The variable diameter cylinder is detachably sleeved on the mandrel (10). The variable diameter cylinder includes a left inner cylinder (2), a right inner cylinder (3), and a middle protruding combined petal mold (9). The middle protruding combined petal mold (9) includes at least two petal molds. The middle protruding combined petal mold (9) is detachably disposed between the left inner cylinder (2) and the right inner cylinder (3). Locking nuts (1) are provided on the opposite sides of the left inner cylinder (2) and the right inner cylinder (3). The left inner cylinder (2), the middle protruding combined petal mold (9), and the right inner cylinder (3) are locked by the locking nuts (1).

2. The easily disassembled variable diameter cylinder winding molding die according to claim 1, characterized in that, The intermediate protrusion combined valve mold (9) includes a first large valve mold (91), a second large valve mold (92), a first small valve mold (93), and a second small valve mold (94). One end of the first large valve mold (91) is movably connected to one end of the second large valve mold (92) through the first small valve mold (93), and the other end of the first large valve mold (91) is movably connected to the other end of the second large valve mold (92) through the second small valve mold (94).

3. The easily disassembled variable diameter cylinder winding molding die according to claim 2, characterized in that, The left inner cylinder (2) and the right inner cylinder (3) both include an outer end cap (4), an inner end cap (5) and a cylinder shell (6). The outer end cap (4) is fixedly installed at one end of the cylinder shell (6), and the inner end cap (5) is fixedly installed at the other end of the cylinder shell (6).

4. The easily disassembled variable diameter cylinder winding molding die according to claim 3, characterized in that, The inner end cap (5) is connected to the middle protrusion combined petal mold (9) with a V-shaped groove (7) in the circumferential direction. The two end faces of the middle protrusion combined petal mold (9) are provided with inclined mounting protrusions that cooperate with the V-shaped groove (7).

5. The easily disassembled variable diameter cylinder winding molding die according to claim 4, characterized in that, Both the outer end cap (4) and the inner end cap (5) are provided with several through holes (8) along the axial direction of the mandrel (10).

6. The easily disassembled variable diameter cylinder winding molding die according to claim 1, characterized in that, The mandrel (10) is a second-order shaft, and a second-order shaft thread section (103) is provided on the outer side of the second-order shaft (102). The locking nut (1) is engaged with the second-order shaft thread section (103).

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