Overall demolding device and method for a tubular segment

Abstract

This invention belongs to the field of composite material component manufacturing technology in the aerospace technology field, and discloses a device and method for integral demolding of cylindrical segments. The device includes a cylindrical mold and a demolding ring. The cylindrical mold has a conical, integral structure with a large end face and a small end face at each end. The outer wall of the cylindrical mold forms a working surface. From the small end face to the large end face, the working surface sequentially includes a cylindrical segment dimension forming surface and a cylindrical segment demolding auxiliary allowance forming surface. The demolding ring includes a demolding ring and an ejection assembly. The demolding ring is sandwiched between the cylindrical segment demolding auxiliary allowance and the cylindrical segment demolding auxiliary allowance forming surface. The ejection assembly is mounted on the cylindrical mold and is drivenly connected to the demolding ring, causing the demolding ring to move towards the small end face. The demolding force is transmitted to the cylindrical segment dimension forming surface through the cylindrical segment demolding auxiliary allowance. This allows for non-destructive demolding of the cylindrical segment, and the demolding ring has a simple structure, is easy to use, and is highly efficient.

Description

Technical Field

[0001] This invention relates to the field of composite material component manufacturing technology in the field of aerospace technology, and in particular to a device and method for integral demolding of cylindrical parts. Background Technology

[0002] Fuselage sections (especially composite material fuselage sections for aircraft) are composed of cap-shaped ribs and skin, and have high torsional stability and buckling strength.

[0003] There are two methods for molding composite fuselage sections: segmented molding and integral molding. To achieve demolding of integral composite fuselage sections, a combination mold is generally used for curing and demolding. Existing patents describe a combination mold for manufacturing integral sections. This combination mold includes a mold body with at least two pairs of segmented molds. During demolding, the segmented molds retract inward, thereby separating the part from the mold.

[0004] However, the above-mentioned combined mold has at least the following problems:

[0005] 1) The combined mold has a complex structure, and the individual molds need to be precisely matched to ensure that the surface of the part is flat and without defects. In addition, a complex motion mechanism is required to achieve smooth separation between the molds.

[0006] 2) Sealing is difficult. There are multiple joint interfaces between the various mold blocks, making sealing complex and high-temperature airtightness difficult to guarantee.

[0007] Based on the above, there is an urgent need for a device and method for integral demolding of cylindrical parts to solve the problems existing in the prior art. Summary of the Invention

[0008] This invention provides a device and method for demolding cylindrical parts as a whole. The demolding process is simple, easy to operate, and highly efficient, while ensuring the production quality of the cylindrical parts and reducing the occurrence of defects.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] A demolding device for integral cylindrical parts, including:

[0011] A cylindrical mold is used to form cylindrical segments. The cylindrical mold has a conical integral structure and forms a large end face and a small end face at both ends. The outer wall of the cylindrical mold forms a working surface. From the small end face to the large end face, the working surface includes a cylindrical segment size forming surface and a cylindrical segment demolding auxiliary allowance forming surface. The cylindrical segment size forming surface is used to form the cylindrical segment size forming part of the cylindrical segment, and the cylindrical segment demolding auxiliary allowance forming surface is used to form the cylindrical segment demolding auxiliary allowance part of the cylindrical segment.

[0012] A demolding ring belt includes a demolding ring and an ejection assembly. The demolding ring is sandwiched between the demolding auxiliary allowance portion of the cylindrical part and the demolding auxiliary allowance forming surface of the cylindrical part. The ejection assembly is disposed on the cylindrical mold and is drivenly connected to the demolding ring so that the demolding ring can move linearly in the direction toward the small end face, so as to transmit the demolding force to the cylindrical part forming portion through the demolding auxiliary allowance portion of the cylindrical part.

[0013] Preferably, a wedge-shaped structure is provided on the demolding ring at the connection between the demolding auxiliary allowance portion of the cylindrical part and the dimensional forming portion of the cylindrical part, and the inclined surface of the wedge-shaped structure is fitted to the demolding auxiliary allowance portion of the cylindrical part.

[0014] Preferably, at least two of the ejection components are provided at intervals on the demolding ring;

[0015] The ejection assembly includes a fixing block and an ejector. The fixing block is connected to the cylindrical mold, and the ejector is slidably disposed on the fixing block, with one end of the ejector abutting against the demolding ring.

[0016] Preferably, the fixing block is provided with a threaded inner hole, and the ejector is provided with an external threaded section, which is threadedly connected to and can pass through the threaded inner hole.

[0017] Preferably, the demolding ring includes at least two enclosing and connected annular bodies, with adjacent annular bodies spaced apart at the junction, forming a clearance to allow for thermal expansion and circumferential deformation of the annular bodies.

[0018] Preferably, the demolding ring further includes at least two connecting blocks, which are radially connected to two adjacent annular bodies and have clearance space between the connecting blocks and the annular bodies in the circumferential direction.

[0019] Preferably, the annular body is provided with a bonding portion, and the annular body is bonded to the cylindrical mold through the bonding portion.

[0020] The present invention also provides a method for integral demolding of cylindrical segments, which utilizes the aforementioned integral demolding device for cylindrical segments and includes the following steps:

[0021] S1. Fit the demolding ring onto the demolding auxiliary allowance forming surface of the cylindrical part of the cylindrical mold;

[0022] S2. The blank used to form the cylindrical part is laid on the outer wall of the cylindrical mold, and part of the blank is placed on the demolding ring.

[0023] S3. After the cylindrical mold with the blank is laid on it is made into a bag, it is sent into a hot autoclave for curing.

[0024] S4. Remove the cured cylindrical mold, drive the demolding ring to move linearly in the direction toward the small end face of the cylindrical mold by pushing out the component, apply pressure to the demolding auxiliary allowance of the cylindrical part, and transmit the demolding force to the cylindrical part size forming part through the demolding auxiliary allowance of the cylindrical part to obtain the demolded cylindrical part.

[0025] Preferably, in step S4, after the cylindrical mold is removed from the autoclave, the demolding ring is removed, and a demolding tool is used to eliminate part of the mechanical force that causes the cylindrical segment to adhere to the cylindrical mold. Then, the demolding ring and the ejection assembly are installed so that the cylindrical segment is completely separated from the cylindrical mold.

[0026] Preferably, in step S4, after the cylindrical section is completely separated from the cylindrical mold, a disassembly tool is used to remove the cylindrical section from the cylindrical mold to obtain the demolded cylindrical section.

[0027] The beneficial effects of this invention are:

[0028] This invention provides an integral demolding device for cylindrical parts. Because the cylindrical mold is a single-piece structure, its working surface is continuous and flat, eliminating the need for segmented mold construction. This simplifies the mold's structure and ensures its high-temperature airtightness and reliability. Furthermore, an annular region for forming an auxiliary demolding allowance is added to the working surface of the cylindrical mold. A demolding ring is sandwiched between this auxiliary demolding allowance and the auxiliary demolding allowance portion. Driven by the ejection assembly, the demolding ring applies a force to the cylindrical part's forming portion through the auxiliary demolding allowance portion, transforming a point-distributed force into a uniformly linearly distributed force in a circumferential direction. The linearly distributed force can be decomposed into linearly distributed forces along the radial direction of the cylindrical mold and along the axis of the cylindrical mold pointing towards the small end face. The linearly distributed force along the radial direction of the cylindrical mold can maintain the stable shape of the cylindrical section, while the linearly distributed force along the axis of the cylindrical mold pointing towards the small end face can realize the movement of the cylindrical section towards the small end face. Under the uniformly distributed circumferential force, the gap between the cylindrical section and the cylindrical mold gradually increases, thereby achieving non-destructive demolding of the cylindrical section. Moreover, the demolding ring has a simple structure, is easy to use, and has higher efficiency.

[0029] This invention also provides a method for integral demolding of cylindrical segments. Utilizing the aforementioned integral demolding device for cylindrical segments, the operation is simple and convenient, and the quality of the cylindrical segments is guaranteed without damage during both the molding and demolding processes. Furthermore, by adjusting the radial dimension of the cylindrical mold, this integral demolding method can be applied to the non-destructive demolding of cylindrical segments of different sizes, thereby greatly expanding its applicability. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the forming of the cylindrical section part on the overall demolding device of the cylindrical section part provided in the embodiment of the present invention;

[0031] Figure 2 This is a top view of the demolding ring provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the demolding ring provided in an embodiment of the present invention;

[0033] Figure 4 It is along Figure 2 Schematic diagram of the cross section at point AA;

[0034] Figure 5 This is a schematic flowchart of the integral demolding method for cylindrical sections provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the annular body installed on the cylindrical mold according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure provided in the embodiment of the present invention, in which a blank for forming cylindrical segments is laid on the outer wall of a cylindrical mold;

[0037] Figure 8 This is a schematic diagram of the structure provided in the embodiment of the present invention, showing the cylindrical mold being fed into a hot autoclave for bag making and curing.

[0038] Figure 9 This is a schematic diagram of the structure provided in the embodiment of the present invention, in which the annular body is reinstalled on the cylindrical mold;

[0039] Figure 10 This is a schematic diagram of the ejection assembly provided in an embodiment of the present invention mounted on a cylindrical mold;

[0040] Figure 11 This is a schematic diagram of the structure of the ejector provided in the embodiment of the present invention after being ejected a specified distance d along the axis of the cylindrical mold.

[0041] In the picture:

[0042] 100. Cylindrical section component; 101. Cylindrical section component dimensional forming part; 102. Cylindrical section component demolding auxiliary allowance part; 103. Cylindrical section component dimensional allowance part; 200. Blank; 300. Vacuum bag;

[0043] 1. Cylindrical mold; 11. Working surface; 111. Forming surface for cylindrical section parts; 112. Forming surface for auxiliary allowance of demolding of cylindrical section parts; 113. Dimensional allowance surface for cylindrical section parts; 12. End face baffle;

[0044] 2. Demolding ring belt; 21. Demolding ring; 211. Ring-shaped body; 2111. Wedge structure; 2112. Fitting part; 212. Allowance gap; 22. Ejection assembly; 221. Fixing block; 222. Ejection part; 23. Connecting block. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] This embodiment provides an integral demolding device for cylindrical parts, mainly used in the molding and preparation of composite material fuselage cylindrical sections for aircraft. (Refer to...) Figure 1 As shown, the overall demolding device for the cylindrical section includes a cylindrical mold 1 and a demolding ring belt 2.

[0050] The cylindrical mold 1 has a conical integral structure, and at both ends of the cylindrical mold 1, there are large end faces and small end faces with gradually decreasing cross-sectional areas. The outer wall of the cylindrical mold 1 forms a working surface 11 that fits and connects with the cylindrical section part 100, and points from the small end face to the large end face. The working surface 11 includes a cylindrical section part size forming surface 111 and a cylindrical section part demolding auxiliary allowance forming surface 112, so as to form the cylindrical section part size forming part 101 and the cylindrical section part demolding auxiliary allowance part 102 in the cylindrical section part 100, respectively.

[0051] The demolding ring 2 includes a demolding ring 21 and an ejection assembly 22. The demolding ring 21 is sandwiched between the demolding auxiliary allowance portion 102 and the demolding auxiliary allowance forming surface 112 of the cylindrical part. The ejection assembly 22 is disposed on the cylindrical mold 1 and is connected to the demolding ring 21 so that the demolding ring 21 can move linearly in the direction toward the small end face, so as to transmit the demolding force to the cylindrical part size forming part 101 through the demolding auxiliary allowance portion 102.

[0052] Through the above configuration, on the one hand, since the cylindrical mold 1 is a one-piece structure, the working surface 11 of the cylindrical mold 1 is continuous and flat, eliminating the need for mold segmentation. This simplifies the construction of the cylindrical mold 1 and eliminates the step required in the prior art to ensure precise fit between the various mold segments to guarantee a smooth and defect-free surface of the workpiece. It also ensures the high-temperature airtightness and reliability of the cylindrical mold 1. On the other hand, because an additional annular area of ​​a cylindrical section workpiece demolding auxiliary allowance forming surface 112 is added to the working surface 11 of the cylindrical mold 1, The demolding ring 21 is installed on the demolding auxiliary allowance forming surface 112 of the cylindrical part. After the demolding auxiliary allowance part 102 and the cylindrical part size forming part 101 are formed, the demolding ring 21 is sandwiched between the demolding auxiliary allowance forming surface 112 and the demolding auxiliary allowance part 102. Under the driving action of the ejection component 22, the demolding ring 21 can apply a certain force to the cylindrical part size forming part 101 through the demolding auxiliary allowance part 102, and convert the point-distributed force into a uniformly linearly distributed force in the circumferential direction. The linearly distributed force can be decomposed into linearly distributed forces along the radial direction of the cylindrical mold 1 and along the axis of the cylindrical mold 1 pointing towards the small end face. The linearly distributed force along the radial direction of the cylindrical mold 1 can maintain the stable shape of the cylindrical section 100, and the linearly distributed force along the axis of the cylindrical mold 1 pointing towards the small end face can realize the movement of the cylindrical section 100 towards the small end face. Under the uniformly distributed circumferential force, the gap between the cylindrical section 100 and the cylindrical mold 1 gradually increases, realizing the demolding of the cylindrical section 100. After demolding, the demolding auxiliary allowance 102 of the cylindrical section can be cut off without affecting the use of the cylindrical section dimensional forming part 101. Thus, the cylindrical section 100 can be demolded without damage, and the demolding ring 21 has a simple structure, is easy to use, and has higher efficiency.

[0053] refer to Figure 3 As shown, the demolding ring 21 is a modular structure, comprising at least two circumferentially arranged arc-shaped annular bodies 211. The embodiment shown in the figure has four circumferentially arranged annular bodies 211, which, when combined, form the annular band structure of the demolding ring 21. Furthermore, adjacent annular bodies 211 are spaced apart at their junctions, forming a clearance 212 to allow for circumferential deformation due to thermal expansion. This ensures that the thermal expansion of the annular bodies 211 matches that of the cylindrical mold 1 during the curing of the cylindrical part 100, preventing extrusion deformation between the annular bodies 211 and avoiding warping or protrusions on the outer circumferential surface of the annular bodies 211. This would affect the forming of the demolding auxiliary clearance portion 102 of the cylindrical part, thereby reducing the risk of damage-free demolding of the cylindrical part 100.

[0054] Further, refer to Figure 4As shown, a wedge-shaped structure 2111 is provided on the annular body 211 at the connection between the demolding auxiliary allowance portion 102 and the cylindrical part size forming portion 101. The inclined surface of the wedge-shaped structure 2111 is fitted to the demolding auxiliary allowance portion 102. The inclined surface of the wedge-shaped structure 2111 can effectively reduce the resistance of the cylindrical part 100 during the demolding process, making it easier for the cylindrical part 100 to be removed from the cylindrical mold 1, reducing friction and jamming during demolding, and also reducing stress concentration at the connection between the demolding auxiliary allowance portion 102 and the cylindrical part size forming portion 101 during demolding, thereby further reducing the possibility of damage to the cylindrical part 100.

[0055] It is understood that the angle of the tip of the wedge structure 2111 can be selectively set according to the configuration of the cylindrical section 100, and the present invention does not limit this.

[0056] The demolding ring 2 also includes multiple connecting blocks 23, see below. Figure 2 As shown, four connecting blocks 23 are provided on the demolding ring 21, corresponding to four allowance gaps 212. Furthermore, in the radial direction, the connecting blocks 23 are connected to two adjacent annular bodies 211, and in the circumferential direction, there is a clearance space between the connecting blocks 23 and the annular bodies 211. This restricts the radial displacement of the annular bodies 211, ensuring that the ends of the annular bodies 211 do not deform in the radial direction, and simultaneously ensuring that the connecting blocks 23 do not interfere with the circumferential deformation process of the annular bodies 211.

[0057] In one embodiment of this invention, the connecting block 23 is an L-shaped connecting block with an arc-shaped cross-section, matching the shape of the annular body 211, and is installed on the part of the annular body 211 without the wedge structure 2111. The connecting block 23 includes two intersecting components, each of which has two threaded parts. One component is positioned opposite the side of the annular body 211, and the circular hole on one component is aligned with the internal threaded circular hole on the side of the annular body 211. The two threaded parts on one component are threadedly connected to the internal threaded circular hole through the circular hole, thereby achieving the limiting and fixing of the connecting block 23 with the annular body 211 in the radial direction. Another component is positioned opposite the end face of the annular body 211, and the waist-shaped hole on the other component is positioned opposite the internal threaded round hole on the end face of the annular body 211. The cross-sectional shape of the waist-shaped hole is also arc-shaped. Two threaded parts on the other component are threadedly connected to the internal threaded round hole through the waist-shaped hole, so that the threaded parts can move circumferentially in the waist-shaped hole, thereby forming the aforementioned clearance space in the waist-shaped hole.

[0058] Furthermore, the annular body 211 is provided with a fitting portion 2112. Figure 3Only one fitting part 2112 is shown in the figure. The annular body 211 is fitted to the cylindrical mold 1 through the fitting part 2112 so that the annular body 211 can maintain the arc shape that matches the cylindrical mold 1, and avoid deformation of the annular body 211 that would affect the demolding efficiency of the cylindrical part 100.

[0059] At least two ejection components 22 are spaced apart on the demolding ring 21. In the embodiment shown in the figure, four ejection components 22 are provided, with one ejection component 22 located in the middle of each annular body 211. Each ejection component 22 includes a fixing block 221 and an ejector 222. The fixing block 221 is connected to the cylindrical mold 1, and the ejector 222 is slidably disposed on the fixing block 221, with one end of the ejector 222 sliding to abut against the corresponding annular body 211. This arrangement allows the four fixing blocks 221 to use the cylindrical mold 1 as a support point. By simultaneously moving the four ejector components 222 relative to the fixing blocks 221 along the demolding direction, when the four ejector components 222 abut against the four annular bodies 211, uniform pressure is applied to the demolding auxiliary allowance portion 102 of the cylindrical part through the four annular bodies 211. This ensures uniform force on the cylindrical part 100 during demolding, effectively improving the quality of the cylindrical part 100 after demolding.

[0060] It should be noted that the number of annular body 211 and pushing components can be determined according to the size and configuration of cylindrical section 100, and the present invention does not limit this.

[0061] In one embodiment of this invention, the fixing block 221 is provided with a threaded inner hole in the vertical direction, and the push-out member 222 can be a structure with an external thread section, such as a screw or bolt. The external thread section is threaded and can be inserted into the threaded inner hole. In this way, by screwing the push-out member 222, the push-out member 222 can be extended and slid on the fixing block 221.

[0062] In addition, refer to Figure 1 As shown, the cylindrical mold 1 has an end face baffle 12 at the large end face, and the fixing block 221 has an L-shaped structure. The fixing block 221 includes two intersecting parts. One part can be fixed to the end face baffle 12 by means of threaded connection, snap-fit ​​connection, etc., and the other part is set relative to the annular body 211. The other part has a threaded inner hole with an opening opposite to the annular body 211, thereby completing the installation of the ejection component 22 and ensuring the function realization of the ejection component 22.

[0063] Of course, in some other parallel embodiments, the ejection component 22 can also be directly fixedly installed on the outer wall of the cylindrical mold 1, as long as the structure of the fixing block 221 is improved so that the ejection component 222 can be directly facing the end face of the annular body 211.

[0064] This embodiment also provides a demolding method based on the above-mentioned integral demolding device for cylindrical segments, such as... Figure 5 As shown, the overall demolding process of this cylindrical section is as follows:

[0065] S1. Fit the demolding ring 21 onto the demolding auxiliary allowance forming surface 112 of the cylindrical mold 1.

[0066] In specific operations, refer to Figure 6 As shown, four annular bodies 211 are installed one by one on the demolding auxiliary allowance forming surface 112 of the cylindrical mold 1, and fixed to the cylindrical mold 1 by the fitting part 2112. In one embodiment of this example, the fitting part 2112 includes a first locking hole, a second locking hole, and a locking bolt. The first locking hole is located at the middle of the side of the annular body 211, and the second locking hole is located on the outer wall of the cylindrical mold 1 at a position higher than the demolding auxiliary allowance forming surface 112. The locking bolt is threaded to the second locking hole through the first locking hole, so that the annular body 211 can be fitted onto the outer wall of the cylindrical mold 1.

[0067] In addition, a clearance 212 is maintained between the annular bodies 211, and a connecting block 23 is installed between adjacent annular bodies 211 to form an annular structure.

[0068] S2. The blank 200 used to form the cylindrical section 100 is laid on the outer wall of the cylindrical mold 1, and part of the blank 200 is placed on the demolding ring 21.

[0069] In practice, the blank 200 used to form the cylindrical section 100 is laid and formed on the cylindrical mold 1 using a male mold. The area for laying the blank 200 is set as follows: (reference) Figure 7 As shown, a cylindrical section dimensional allowance surface 113 is provided on the working surface 11 beyond the net size line (NOP). The cylindrical section dimensional allowance surface 113 is used to form the cylindrical section dimensional allowance portion 103 and to solve the edge effect of the formed cylindrical section dimensional forming portion 101. The material continues to be laid outside the allowance line (EOP) onto the cylindrical section demolding auxiliary allowance forming surface 112, thereby ensuring that a certain amount of blank 200 is laid onto the wedge-shaped structure 2111 of the annular body 211.

[0070] S3. After the cylindrical mold 1 with the blank 200 is made into a bag, it is sent into the autoclave for curing.

[0071] In specific operations, refer to Figure 8 As shown, after the tiling is completed, a vacuum bag 300 is used to cover the entire working surface 11 and the demolding ring 21 area on the cylindrical mold 1. After the vacuum bag 300 passes the leak test, the cylindrical mold 1 is sent into an autoclave for curing.

[0072] S4. Remove the cured cylindrical mold 1, drive the demolding ring 21 to move linearly in the direction toward the small end face of the cylindrical mold 1 by pushing out the component 22, apply pressure to the demolding auxiliary allowance part 102 of the cylindrical part, and transmit the demolding force to the cylindrical part size forming part 101 through the demolding auxiliary allowance part 102 of the cylindrical part, and obtain the demolded cylindrical part 100.

[0073] In specific operation, after the cylindrical mold 1 is taken out of the autoclave, the demolding ring 21 is first removed, and a demolding tool (such as a demolding wedge) is inserted at both ends of the junction between the cylindrical section 100 and the cylindrical mold 1. The demolding tool is used to first eliminate the mechanical force of adhesion between the cylindrical section 100 and the cylindrical mold 1, specifically the adhesion and adsorption force, so that the cylindrical section 100 and the cylindrical mold 1 are initially separated, which helps to completely separate the cylindrical section 100 from the cylindrical mold 1 using the ejection assembly 22.

[0074] Next, refer to Figure 9 and Figure 10 As shown, the demolding ring 21 is then fitted onto the demolding auxiliary allowance forming surface 112 of the cylindrical part, and connected with the connecting block 23 to form an integral ring. Then, multiple ejection components 22 are installed, and the fixing block 221 is installed and fixed on the cylindrical mold 1 or the end face baffle 12.

[0075] Next, refer to Figure 11 As shown, multiple ejector parts 222 are operated simultaneously to push out a specified distance d along the axis of the cylindrical mold 1, thereby causing the demolding ring 21 to move uniformly a certain distance (i.e., the specified distance d). It is worth noting that since the cylindrical section dimensional allowance part 103, the cylindrical section dimensional forming part 101, and the cylindrical section demolding auxiliary allowance part 102 are laid and cured simultaneously, the structure has high strength. Therefore, under the action of the linearly distributed force F along the axis of the cylindrical mold 1 pointing towards the small end face, the cylindrical section 100 can move as a whole by d, thereby completely separating the cylindrical section 100 from the cylindrical mold 1.

[0076] Finally, after the cylindrical section 100 is completely separated from the cylindrical mold 1, a removal tool (such as a hook) can be used to remove the cylindrical section 100 from the cylindrical mold 1 to obtain the demolded cylindrical section 100, thereby ensuring the demolding of the cylindrical section 100 without damage.

[0077] In the above-described method for demolding the entire cylindrical part, the demolding ring 21 applies uniform downward pressure to the additionally provided demolding auxiliary allowance part 102, and transmits this pressure to the cylindrical part dimensional forming part 101. This causes the entire cylindrical part 100 to move along the axis and separate from the cylindrical mold 1, resulting in uniform force on the cylindrical part 100 during demolding. Simultaneously, the cylindrical mold 1 achieves integrated structure, eliminating the need for segmented design and manufacturing. This results in a smoother, gap-free surface of the cylindrical mold 1, effectively simplifying its tooling design and making operation more convenient. This ensures the cylindrical part 100 maintains quality and is lossless during both the forming and demolding processes. Furthermore, by adjusting the radial dimension of the cylindrical mold 1, this method can be applied to the non-destructive demolding of cylindrical parts 100 of different sizes, significantly expanding the applicability of the device and method.

[0078] The following example illustrates the molding of a cylindrical section 100 with a diameter of 3 meters:

[0079] (1) Install 6 annular bodies 211 one by one on the demolding auxiliary allowance forming surface 112 of the cylindrical mold 1. The wedge structure 2111 of the demolding ring 21 has a sharp angle of 10°. The allowance gap 212 between the annular bodies 211 is about 1mm. First, fix the annular bodies 211 to the cylindrical mold 1 with locking bolts. Then install 6 connecting blocks 23 to fix the 6 annular bodies 211 into an annular structure that matches the shape of the cylindrical mold 1.

[0080] (2) The blank 200 used to form the cylindrical section part 100 is laid and formed on the cylindrical mold 1. The axial length of the blank 200 on the demolding auxiliary allowance forming surface 112 and the dimensional allowance surface 113 of the cylindrical section part is 50mm and 25mm respectively, so as to ensure that the blank 200 with an axial length of 50mm is laid on the wedge structure 2111 of the annular body 211;

[0081] (3) After the paving is completed, it is cured on the cylindrical mold 1, and the vacuum bag 300 covers the entire working surface 11 and the demolding ring 21. After the vacuum bag 300 passes the leak test, it is placed in the autoclave for curing;

[0082] (4) Remove the vacuum bag 300, remove the locking bolts, and remove the connecting block 23 and the 6 annular bodies 211;

[0083] (5) Use demolding tools such as demolding wedges to initially separate the cylindrical part 100 from the cylindrical mold 1. The initial separation of the cylindrical part 100 from the cylindrical mold 1 can be confirmed by tapping.

[0084] (6) Reinstall the 6 annular bodies 211 and 6 connecting blocks 23, and install the ejection assembly 22. Fix the fixing block 221 in the ejection assembly 22 onto the end face baffle 12 of the cylindrical mold 1.

[0085] (7) Simultaneously operate the ejector 222 of multiple ejection components 22, so that multiple ejector 222 are ejected synchronously along the axial direction close to the small end face of the cylindrical mold 1. The ejection speed can be adjusted according to the actual situation so that the six annular bodies 211 move uniformly along the axial direction by 4mm, thereby causing the cylindrical section 100 to move 4mm away from the cylindrical mold 1 along the axial direction, thereby achieving complete separation of the cylindrical section 100 from the cylindrical mold 1.

[0086] (8) Use a hook or other dismantling tool to remove the cylindrical section 100 from the cylindrical mold 1 and transfer it to the subsequent work station.

[0087] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for integral stripping of a piece of a segment, characterized in that, include: A cylindrical mold (1) is used to form a cylindrical segment part (100). The cylindrical mold (1) has a conical integral structure and forms a large end face and a small end face at both ends. The outer wall of the cylindrical mold (1) forms a working surface (11). From the small end face to the large end face, the working surface (11) includes a cylindrical segment part size forming surface (111) and a cylindrical segment part demolding auxiliary allowance forming surface (112). The cylindrical segment part size forming surface (111) is used to form the cylindrical segment part size forming part (101) of the cylindrical segment part (100). The cylindrical segment part demolding auxiliary allowance forming surface (112) is used to form the cylindrical segment part demolding auxiliary allowance part (102) of the cylindrical segment part (100). The demolding ring (2) includes a demolding ring (21) and an ejection assembly (22). The demolding ring (21) is sandwiched between the demolding auxiliary allowance portion (102) of the cylindrical part and the demolding auxiliary allowance forming surface (112) of the cylindrical part. The ejection assembly (22) is disposed on the cylindrical mold (1) and is connected to the demolding ring (21) so that the demolding ring (21) can move linearly in the direction toward the small end face so as to transmit the demolding force to the cylindrical part size forming part (101) through the demolding auxiliary allowance portion (102) of the cylindrical part.

2. The barrel segment assembly ejection device of claim 1, wherein, On the demolding ring (21), a wedge-shaped structure (2111) is provided at the connection between the demolding auxiliary allowance part (102) of the cylindrical part and the dimensional forming part (101) of the cylindrical part. The inclined surface of the wedge-shaped structure (2111) is fitted to the demolding auxiliary allowance part (102) of the cylindrical part.

3. The barrel segment assembly ejection device of claim 1, wherein, At least two ejection components (22) are provided at intervals on the demolding ring (21); The ejection assembly (22) includes a fixing block (221) and an ejector (222). The fixing block (221) is connected to the cylindrical mold (1). The ejector (222) is slidably disposed on the fixing block (221), and one end of the ejector (222) can abut against the demolding ring (21).

4. The barrel segment assembly ejection device of claim 3, wherein, The fixing block (221) is provided with a threaded inner hole, and the ejector (222) is provided with an external threaded section, which is threadedly connected and can pass through the threaded inner hole.

5. The barrel segment assembly ejection device of claim 1, wherein, The demolding ring (21) includes at least two enclosing and connected annular bodies (211), with adjacent annular bodies (211) spaced apart at the junction, forming a clearance (212) for thermal expansion and circumferential deformation of the annular bodies (211).

6. The barrel segment assembly ejection device of claim 5, wherein, The demolding ring (2) further includes at least two connecting blocks (23), which are radially connected to two adjacent annular bodies (211) and have a clearance space between the connecting blocks (23) and the annular bodies (211) in the circumferential direction.

7. The barrel segment assembly ejection device of claim 6, wherein, The annular body (211) is provided with a fitting part (2112), and the annular body (211) is fitted to the cylindrical mold (1) through the fitting part (2112).

8. A method of integral stripping of a tubular segment assembly, characterized by, This method utilizes the integral demolding device for cylindrical sections as described in any one of claims 1-7, and includes the following steps: S1. Fit the demolding ring (21) onto the demolding auxiliary allowance forming surface (112) of the cylindrical mold (1); S2. The blank (200) for forming the cylindrical section part (100) is laid on the outer wall of the cylindrical mold (1), and part of the blank (200) is covered on the demolding ring (21); S3. After the cylindrical mold (1) on which the blank (200) is laid is made into a bag, it is sent into a hot autoclave for curing. S4. Take out the solidified cylindrical mold (1), drive the demolding ring (21) to move linearly in the direction toward the small end face of the cylindrical mold (1) by the ejection component (22), apply pressure to the demolding auxiliary allowance part (102) of the cylindrical part, and transmit the demolding force to the cylindrical part size forming part (101) through the demolding auxiliary allowance part (102) of the cylindrical part, and obtain the demolded cylindrical part (100).

9. The method of Claim 8, wherein In step S4, after the cylindrical mold (1) is removed from the autoclave, the demolding ring (21) is removed, and a demolding tool is inserted to eliminate part of the mechanical force between the cylindrical segment (100) and the cylindrical mold (1). Then, the demolding ring (21) and the ejection assembly (22) are installed so that the cylindrical segment (100) is completely separated from the cylindrical mold (1).

10. The method of claim 9, wherein, In step S4, after the cylindrical section part (100) is completely separated from the cylindrical mold (1), a disassembly tool is used to remove the cylindrical section part (100) from the cylindrical mold (1) to obtain the demolded cylindrical section part (100).

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