NOL ring winding forming and demolding equipment

Abstract

The invention discloses NOL ring winding forming and demolding equipment which comprises a plurality of NOL ring molds and a plurality of blocking discs, a positioning device comprises a rack and a control disc, each NOL ring mold comprises a plurality of groups of split circular rings, the split circular rings are connected end to end to form a closed annular structure, the control disc is rotated, the NOL ring molds are in at least two states, and the NOL ring molds are separated from the blocking discs. And in the first state, each group of split circular rings radially stretch to enable the annular structure to form a circular ring, and in the second state, each group of split circular rings radially contract to enable the annular structure to form a prismatic ring. The disc is controlled to rotate and is matched with the rack to control radial extension and contraction of the sectioned circular rings of the NOL ring mold, winding forming and demolding of the NOL ring are achieved, a multi-point separation effect is generated in a prismatic ring contraction mode, the adhesion problem between the NOL ring and the NOL ring mold 3 is effectively solved, demolding of a product is more efficient and low in loss, and therefore the quality of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material NOL ring manufacturing processes, and particularly to an NOL ring winding forming and demolding device. Background Art

[0002] The winding forming technology is an advanced manufacturing process mainly used for producing high-performance composite materials. Its basic principle is to evenly wind fiber materials (such as carbon fiber, glass fiber) and resin matrix on a mandrel through an automated machine to form a structure with high strength and high rigidity. This technology is widely used in fields such as aerospace, automotive industry, and energy, for manufacturing rocket engine rings, lightweight body components, and wind turbine blades, etc.

[0003] Currently, the research on the forming process of thermosetting NOL rings needs to be further deepened. Compared with the secondary forming technology, the preparation of thermoplastic NOL rings mainly relies on the in-situ forming process. However, the inventor found that even when the mold manufacturing, raw material quality, and specific preparation operations are all completely normal, problems such as difficult demolding and demolding damage still occur, affecting the final quality of the product. Summary of the Invention

[0004] The present invention provides an NOL ring winding forming and demolding device, which can solve the problems of difficult demolding and demolding damage in the background art that affect the final quality of the product.

[0005] An NOL ring winding forming and demolding device includes: a positioning device, the positioning device is connected with a plurality of NOL ring molds and a plurality of barrier discs, and the NOL ring molds and the barrier discs are arranged alternately;

[0006] The positioning device includes a frame and a control disc connected to the NOL ring mold. The NOL ring mold includes a plurality of split ring segments, and the plurality of split ring segments are connected end to end to form a closed annular structure;

[0007] Rotate the control disc to make the NOL ring mold present at least two states;

[0008] In the first state, each group of split ring segments radially expands, making the annular structure form a circular ring;

[0009] In the second state, each group of split ring segments radially contracts, making the annular structure form a prismatic ring.

[0010] Preferably, the frame is provided with a shaft hole, and extension parts are circumferentially and arrayedly distributed on the shaft hole, and each extension part corresponds to each group of split ring segments.

[0011] Preferably, the extension part is provided with a through groove radially and a sliding hole axially, and the through groove communicates with the sliding hole.

[0012] Preferably, each group of split rings includes a first split ring and a second split ring, and a hinge is arranged between the first split ring and the second split ring, so that the first split ring and the second split ring are rotationally connected through the hinge.

[0013] Preferably, a connecting rod is hinged to each of the first split ring and the second split ring, the contact ends of the two connecting rods are located in the through groove, and a pin is arranged at the contact ends, so that the two connecting rods are hinged to each other through the pin, and the pin is slidably connected with the sliding hole.

[0014] Preferably, the control disc is provided with a plurality of arc-shaped disc holes, and the pin is slidably connected with the disc holes.

[0015] Preferably, the extension part is provided with a first positioning hole at one end far away from the shaft hole.

[0016] Preferably, a plurality of second positioning holes are arranged in a circumferential array on the barrier disc, and the second positioning holes correspond to the first positioning holes.

[0017] Preferably, a positioning screw is arranged in the second positioning hole and the first positioning hole, and a positioning disc is fixedly installed at the end of the positioning screw.

[0018] Preferably, the positioning device includes a main shaft, and a locking block is sleeved on the main shaft.

[0019] Advantages of the present invention:

[0020] (1) In the present invention, by rotating the control disc and cooperating with the frame to control the radial expansion and contraction of the split rings of the NOL ring mold, the winding forming and demoulding of the NOL ring are realized. The multi-point separation effect generated by the contraction mode of the prismatic ring effectively solves the adhesion problem between the NOL ring and the NOL ring mold 3, making the demoulding of the product more efficient and less damaged, thereby improving the quality of the product.

[0021] (2) In the present invention, during demoulding, the split ring contracts from the first state to the second state, and by reducing the contact area between the outer contour of the NOL ring mold and the inner wall of the NOL ring, the demoulding resistance is significantly reduced, which is more suitable for the high adhesion characteristics of thermoplastic composites.

[0022] (3) In the present invention, the radial expansion and contraction mechanism of the split ring supports the continuous adjustment of the outer diameter of the NOL ring mold. By replacing the barrier disks of different sizes, it can adapt to the preparation requirements of various standard test samples. The control disk provides a multi-level limit function, and the operator can preset different shrinkage ratios to adapt to the demolding requirements of different resin systems.

[0023] (4) Through the precise alignment design of the positioning screw and the second positioning hole and the first positioning hole, the barrier disk and the NOL ring mold can be quickly and alternately stacked. In conjunction with the locking block on the main shaft, a stable axial pressure can be formed during the winding process to prevent the generation of interlayer gaps. This structure supports the synchronous operation of multiple sets of NOL ring molds, which effectively improves the single production capacity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a NOL ring winding molding and demoulding device of the present invention;

[0025] Figure 2 An exploded view of a NOL ring winding molding and demoulding device of the present invention;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure of the middle rack;

[0027] Figure 4 for Figure 2 Schematic diagram of the structure of the middle barrier disk;

[0028] Figure 5 for Figure 2 Schematic diagram of the matching structure between the middle NOL ring mold and the frame in the second state;

[0029] Figure 6 for Figure 2 Schematic diagram of the coordination structure between the middle NOL ring die, the frame and the control disc in the second state;

[0030] Figure 7 for Figure 2 Schematic diagram of the matching structure of the middle NOL ring mold, the frame and the control disc in the first state.

[0031] Description of reference numerals:

[0032] 1. Positioning device; 11. Spindle; 12. Positioning disk; 13. Frame; 131. Shaft hole; 132. Extension portion; 133. First positioning hole; 134. Through groove; 135. Sliding hole; 14. Control disk; 15. Positioning screw; 16. Disk hole; 2. Locking block; 3. NOL ring mold; 31. First petal ring; 32. Second petal ring; 33. Hinge; 34. Connecting rod; 35. Pin; 4. Blocking disk; 41. Second positioning hole. Specific Embodiments

[0033] The following will describe the specific embodiments of the present invention in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0034] In the prior art, the research on the forming process of thermosetting NOL rings remains to be deepened. Compared with the secondary forming technology, the preparation of thermoplastic NOL rings mainly relies on the in-situ forming process. In the experimental research stage, NOL ring-shaped specimens or single-layer plate structures formed by winding are usually selected to carry out mechanical property tests such as tensile and shear to obtain strength parameters. Based on the comprehensive considerations of process feasibility, economy, and production efficiency, the winding preparation process of NOL rings has become the mainstream choice.

[0035] The inventors found that even when the production of the mold, the quality of the raw materials, and the specific operations of the preparation are all completely normal, problems such as difficult demolding and demolding damage still occur, affecting the final quality of the product. This poses more stringent technical requirements for the design accuracy and material adaptability of the processing mold.

[0036] Therefore, the inventors analyzed the winding preparation process of NOL rings and found the technical difficulties in this process implementation: during the thermoplastic winding process, if the prepreg tape is not effectively constrained, high tension is likely to cause interlayer slip; due to the viscoelastic properties of the prepreg itself, fluctuations in the width and thickness of the ring body are likely to occur during winding, affecting the homogeneity of the product; the process parameters need to precisely control the preheating temperature to ensure the fluidity of the material. In addition, the interfacial adhesion between the mandrel and the composite material after winding molding will also cause demolding damage problems.

[0037] As Figure 1 - Figure 2 shown, the present invention proposes a NOL ring winding molding and demolding device, including: a positioning device 1, the positioning device 1 is connected with a plurality of NOL ring molds 3 and a plurality of barrier disks 4, and the NOL ring molds 3 and the barrier disks 4 are arranged alternately.

[0038] Among them, as Figure 1 - Figure 4 shown, the positioning device 1 includes a main shaft 11, the main shaft 11 is sleeved with a locking block 2 and a frame 13 connected to the NOL ring mold 3. The frame 13 is provided with a shaft hole 131, and the shaft hole 131 is adapted to the main shaft 11. A plurality of extension parts 132 are circumferentially arranged on the shaft hole 131. The extension part 132 is provided with a through groove 134 in the radial direction and a sliding hole 135 in the axial direction, and the through groove 134 is communicated with the sliding hole 135.

[0039] Further, a first positioning hole 133 is formed at one end of the extension portion 132 away from the shaft hole 131, and a plurality of second positioning holes 41 are formed in a circumferential array on the barrier disc 4. The second positioning holes 41 correspond to the first positioning holes 133. A positioning screw 15 is arranged in the second positioning holes 41 and the first positioning holes 133, and a positioning disc 12 is fixedly installed at the end of the positioning screw 15.

[0040] As Figure 5 - Figure 6 shown, the NOL ring mold 3 includes a plurality of split ring segments, and the plurality of split ring segments are connected end to end to form a closed annular structure, and each extension portion 132 corresponds to each group of split ring segments, and the number of extension portions 132 is the same as the number of groups of split ring segments.

[0041] Specifically, each group of split ring segments includes a first split ring segment 31 and a second split ring segment 32. A hinge 33 is arranged between the first split ring segment 31 and the second split ring segment 32, and the first split ring segment 31 and the second split ring segment 32 are rotatably connected through the hinge 33. Serrated portions are arranged at the tail ends of the first split ring segment 31 and the second split ring segment 32 (the tail ends are the ends away from the hinge 33). In the closed annular structure, the adjacent two serrated portions are engaged with each other. The engagement design of the serrated portions forms a seamless ring in the closed state, ensuring the continuous smoothness of the mold surface during the winding process and effectively suppressing the interlayer slip of the prepreg tape. In addition, the detachable performance of the positioning device 1 (the spindle 11 is matched with the shaft hole 131 of the frame 13) and the modular design of the NOL ring mold 3 enable quick replacement when a single split ring segment (the first split ring segment 31 or the second split ring segment 32) is damaged, avoiding the waste of resources caused by the scrapping of traditional integral molds. The hinge 33 can be treated with a high-hardness ceramic coating and still maintain stable opening and closing performance in a high-temperature curing environment (≤300 °C), thereby improving its service life.

[0042] A connecting rod 34 is hinged to each of the first split ring segment 31 and the second split ring segment 32. The contact ends of the two connecting rods 34 are located in the through groove 134, and a pin 35 is arranged at the contact end, and the two connecting rods 34 are hinged to each other through the pin 35. The pin 35 is slidably connected with the sliding hole 135. The sliding fit between the pin 35 and the sliding hole 135 can realize the synchronous movement of a plurality of connecting rods 34, so that the first split ring segment 31 and the second split ring segment 32 move synchronously, thereby avoiding local stress concentration and ensuring the uniformity of the ring body thickness.

[0043] The positioning device 1 further includes a control disc 14. The control disc 14 is provided with a plurality of arc-shaped disc holes 16. Each disc hole 16 corresponds to each pin 35 one by one, and the pin 35 is slidably connected with the disc hole 16.

[0044] In this embodiment, as Figure 5 - Figure 7As shown in the figure, rotating the control disc 14 can drive the pin 35 to slide within the disc hole 16. Under the limitation of the frame 13, the pin 35 slides within the sliding hole 135, thereby changing the angle between the two hinged connecting rods 34. When the angle between the two hinged connecting rods 34 increases, the first split ring 31 and the second split ring 32 gradually open. When the angle between the two hinged connecting rods 34 decreases, the first split ring 31 and the second split ring 32 gradually close.

[0045] During use, rotate the control disc 14 to make the NOL ring mold 3 present at least two states.

[0046] As Figure 7 shown, in the first state, each set of split rings radially expands, causing the annular structure to form a circular ring.

[0047] Specifically, when starting to wind, by rotating the control disc 14 clockwise, it drives the first split ring 31 and the second split ring 32 to radially expand. At this time, the angle between the two hinged connecting rods 34 increases, and the first split ring 31 and the second split ring 32 gradually open until the annular structure forms a circular ring. This state is used for the winding preparation of the NOL ring.

[0048] As Figure 5 - Figure 6 shown, in the second state, each set of split rings radially contracts, causing the annular structure to form a prismatic ring.

[0049] Specifically, after winding is completed, by rotating the control disc 14 counterclockwise, it drives the first split ring 31 and the second split ring 32 to radially contract. At this time, the angle between the two hinged connecting rods 34 decreases, and the first split ring 31 and the second split ring 32 gradually close until the annular structure changes from a circular ring to a prismatic ring. This state is used for the demolding of the NOL ring.

[0050] By driving the connecting rod 34 to slide within the disc hole 16 through the control disc 14, and at the same time, the connecting rod 34 radially moves at the sliding hole 135 within the frame 13, and then the connecting rod 34 drives the first split ring 31 and the second split ring 32 to rotate around the hinge 33, realizing the folding of the first split ring 31 and the second split ring 32. Through the contraction and folding of the NOL ring mold 3, a more convenient, efficient, and low-damage NOL finished product demolding is achieved.

[0051] In this application, the rotation of the control disk 14 drives the connecting rod 34 to control the radial expansion and contraction of the split ring, realizing the winding forming and demoulding of the NOL ring. Moreover, the efficient and low-loss demoulding method can improve the quality of the product. Combined with the positioning screw 15, the movement of the barrier disk 4 and the NOL ring mold 3 is made consistent, which helps the formed NOL ring finished product meet the test requirements. The locking block 2 restricts the axial movement of the barrier disk 4 and the NOL ring mold 3, facilitating the winding forming of the NOL ring. In some embodiments, a high-temperature resistant sensor 36 (preferably an optical fiber sensor) is arranged on the connecting rod 34. The sensor 36 can measure the fiber tension during the winding process and conduct real-time monitoring and feedback. The connecting rod 34 integrates the sensor 36, which can monitor the winding tension in real time and feedback it to the control system. By dynamically adjusting the rotation angle of the control disk 14, the stress relaxation caused by the viscoelasticity of the prepreg can be compensated, ensuring the consistency of the mechanical properties of the ring body.

[0052] The NOL ring winding forming and demoulding equipment actively peels off the product through the contraction action of the split ring, rather than the traditional ejection demoulding. It can be compatible with prepreg systems containing glass fiber / carbon fiber / aramid fiber, and is especially suitable for the non-destructive demoulding of composites with a high fiber volume fraction (≥60%). The multi-point separation effect generated by the prismatic ring contraction mode effectively solves the adhesion problem between the NOL ring and the NOL ring mold 3.

[0053] It can be understood that through the cooperation between the control disk 14, the frame 13 and the NOL ring mold 3, and through the linkage mechanism between the split ring structure (the first split ring 31 and the second split ring 32) and the control disk 14, the radial contraction and expansion of the NOL ring mold 3 are realized. During demoulding, the split ring contracts from the first state to the second state, significantly reducing the demoulding resistance by reducing the contact area between the outer contour of the NOL ring mold 3 and the inner wall of the NOL ring, and being more suitable for the high adhesion characteristics of thermoplastic composites. The radial expansion and contraction mechanism of the split ring supports the continuous adjustment of the outer diameter of the NOL ring mold 3. By replacing the barrier disk 4 with different sizes, the preparation requirements of various standard test specimens such as ASTM D2290 and GB / T 1458 can be adapted. The arc-shaped disk hole 16 of the control disk 14 provides a multi-level limiting function, and the operator can preset different contraction ratios to meet the demoulding requirements of different resin systems.

[0054] Such as Figure 1 - Figure 2 、 Figure 5 - Figure 7As shown, the NOL ring winding forming and demolding equipment needs to be assembled during use. First, install the positioning disk 12 on the main shaft 11, then align the second positioning hole 41 of the barrier disk 4 with the positioning screw 15 and sleeve it on the main shaft 11. Rotate the control disk 14 clockwise until the maximum limit is reached, so that the first split ring 31 and the second split ring 32 of the NOL ring mold 3 are opened to form a ring. Assemble the NOL ring mold 3 equipped with the frame 13 and the control disk 14 on the main shaft 11. When assembling, align the first positioning hole 133 with the positioning screw 15. Install multiple barrier disks 4 and NOL ring molds 3 alternately in this way until the last barrier disk 4 is installed. Then install the locking block 2 on the main shaft 11 to limit the axial movement of the barrier disk 4 and the NOL ring mold 3. After the winding and curing are completed, remove the locking block 2, and successively remove the paired barrier disks 4 and the NOL ring mold 3 equipped with the frame 13 and the control disk 14 from the main shaft 11. Rotate each removed NOL ring mold 3 counterclockwise. The control disk 14 drives the connecting rod 34 to move on the frame 13, so that the first split ring 31 and the second split ring 32 of the NOL ring mold 3 fold inward. The first split ring 31 and the second split ring 32 rotate inward through the hinge 33, and the intersecting area is transitioned through the serrated part at the end of the split ring. At this time, remove the prepared NOL ring finished product to realize the demolding of the NOL ring finished product with high efficiency and low damage.

[0055] During the assembly process, through the precise alignment design of the positioning screw 15 with the second positioning hole 41 and the first positioning hole 133, the rapid and alternating stacking of the barrier disk 4 and the NOL ring mold 3 is realized. Cooperating with the locking block 2 on the main shaft 11, a stable axial pressure can be formed during the winding process to prevent the generation of interlayer gaps. This structure supports the synchronous operation of multiple groups of NOL ring molds 3, effectively improving the single production capacity of the product.

[0056] The above only discloses several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A NOL ring winding forming and demoulding device, characterized in that Comprising: A positioning device (1), the positioning device (1) being connected with a plurality of NOL ring molds (3) and a plurality of barrier disks (4), the NOL ring molds (3) and the barrier disks (4) being arranged alternately; The positioning device (1) includes a frame (13) and a control disk (14) connected to the NOL ring mold (3), the NOL ring mold (3) including a plurality of split ring segments, and the plurality of split ring segments being connected end to end to form a closed annular structure; Rotate the control disk (14) to make the NOL ring mold (3) present at least two states; In the first state, each group of split ring segments radially expands, so that the annular structure forms a ring; In the second state, each group of split ring segments radially contracts, so that the annular structure forms a prismatic ring.

2. The NOL ring winding and demolding device according to claim 1, characterized in that, The frame (13) is provided with a shaft hole (131), and extension parts (132) are circumferentially and arrayedly distributed on the shaft hole (131), and each extension part (132) corresponds to each group of split ring segments.

3. The NOL ring winding and demoulding device according to claim 2, wherein The extension part (132) is provided with a through groove (134) radially and a sliding hole (135) axially, and the through groove (134) is communicated with the sliding hole (135).

4. A NOL ring winding and demolding device according to claim 3, characterized in that, Each group of split ring segments includes a first split ring segment (31) and a second split ring segment (32), and a hinge (33) is arranged between the first split ring segment (31) and the second split ring segment (32), and the first split ring segment (31) and the second split ring segment (32) are rotationally connected through the hinge (33).

5. The NOL ring winding and demolding equipment according to claim 4, characterized in that, A connecting rod (34) is hinged to each of the first split ring segment (31) and the second split ring segment (32), the contact ends of the two connecting rods (34) are located in the through groove (134), and a pin (35) is arranged at the contact ends, and the two connecting rods (34) are hinged to each other through the pin (35), and the pin (35) is slidably connected with the sliding hole (135).

6. The NOL ring winding and demolding device according to claim 5, characterized in that, The control disk (14) is provided with a plurality of arc-shaped disk holes (16), and the pin (35) is slidably connected with the disk holes (16).

7. The NOL ring winding and demoulding device according to claim 2, characterized in that The extension part (132) is provided with a first positioning hole (133) at one end far from the shaft hole (131).

8. A NOL ring winding and demolding device according to claim 7, characterized in that, The barrier disk (4) is circumferentially and arrayedly provided with a plurality of second positioning holes (41), and the second positioning holes (41) correspond to the first positioning holes (133).

9. A NOL ring winding and demoulding device according to claim 8, characterized in that, A positioning screw (15) is arranged in the second positioning hole (41) and the first positioning hole (133), and a positioning disk (12) is fixedly installed at the end of the positioning screw (15).

10. The NOL ring winding and demolding equipment according to claim 1, characterized in that, The positioning device (1) includes a main shaft (11), and a locking block (2) is sleeved on the main shaft (11).

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