MiniSAS wire and manufacturing process thereof
By employing a flat strip grounding wire and a specific manufacturing process in the miniSAS cable, the problem of difficult insertion and removal in dense spaces has been solved, achieving a smaller cross-sectional area and higher shielding performance, making it suitable for high-density data transmission in server and storage systems.
Patent Information
- Application Number
- CN202511849366.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-02-17
AI Technical Summary
The miniSAS line is difficult to plug and unplug in dense spaces, and the grounding wire requires a large amount of space, which makes it difficult to further reduce its cross-sectional area and make it difficult to use in clusters in more limited spaces.
A flat strip grounding wire is used, extending along the length of the miniSAS wire and placed between the shielding layer and the outer sheath of the wire harness. Combined with specific manufacturing processes such as direct wrapping molds and wrapping processes, it ensures that the grounding wire and the shielding layer are tightly fitted, reducing wire harness gaps and wear, and enhancing the shielding effect.
It enables convenient use of miniSAS cables in limited spaces, reduces dirt accumulation and wear between the cable sheath and shielding layer, lowers the risk of cracking and breakage of the grounding wire, and improves signal shielding performance.
Smart Images
Figure CN121545839A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of data lines, in particular to a miniSAS line and a manufacturing process thereof. BACKGROUND
[0002] The miniSAS (Mini Serial Attached SCSI) line is a high-density high-speed data transmission cable for servers and storage systems, and its original design is to realize multi-channel interconnection in a limited space, which leads to the need for plugging in a dense space. In order to facilitate plugging in a dense space, the cross-sectional area of the miniSAS line is usually small, generally not more than 5 mm2. Moreover, such a wire harness needs to use a compact connector with small terminals so as to accommodate more ports in a narrow PCB space.
[0003] REFERENCE Figure 1 In the prior art, the miniSAS line includes a transmission line core, an insulating layer, a shielding layer, a wire harness outer skin, and a ground wire. The transmission line core is provided with two, the two transmission line cores are arranged side by side, and the two transmission line cores are respectively used for receiving and relaxing signals. The insulating layer is wrapped around the two transmission line cores, the shielding layer is wrapped around the insulating layer, and the wire harness outer skin is wrapped around the shielding layer. The ground wire is provided with two, the two ground wires are respectively located on both sides of the two transmission line cores, and the distribution directions of the two ground wires are consistent with the distribution directions of the two line cores. The cross section of the ground wire is circular, and the shielding layer and the wire harness outer skin are tightly fitted on the ground wire.
[0004] In view of the above related technology, the space required for setting the ground wire is large, which makes it inconvenient to further reduce the cross-sectional area of the miniSAS line and to use it in a more limited space. SUMMARY
[0005] In order to make the miniSAS line more convenient to use in a limited space, the present application provides a miniSAS line.
[0006] The miniSAS line provided by the present application adopts the following technical scheme: A miniSAS line includes a transmission line core, an insulating layer, a shielding layer, a wire harness outer skin, and a ground wire, the transmission line core is provided with several, the several transmission line cores are arranged side by side along the width direction of the miniSAS line, the insulating layer is wrapped around each transmission line core, the shielding layer is wrapped around the insulating layer, and the wire harness outer skin is wrapped around the shielding layer. The ground wire is located between the shielding layer and the wire harness outer skin, and the shielding layer and the wire harness outer skin are attached to the ground wire. The ground wire is arranged in a flat strip shape, extends along the length direction of the miniSAS line, and the cross section of the ground wire is arranged in a rectangular shape.
[0007] By adopting the above technical scheme, the ground wire in the form of a flat strip is more easily attached to the surface of the shielding layer, the cross section of the miniSAS wire is more easily reduced, and thus the miniSAS wire is more easily used in a limited space. Moreover, it is also convenient to reduce the gap between the wire harness sheath and the shielding layer, so that dirt is not easily accumulated between the wire harness sheath and the shielding layer after the wire harness is cut, and the situation that the shielding layer is abraded by the ground wire is reduced. At the same time, the ground wire in the form of a flat strip has a large area facing the transmission line core, which can also play a certain shielding role, and thus the miniSAS wires used in a bundle are not easily interfered with each other.
[0008] Optionally, the width direction of the ground wire is consistent with the width direction of the miniSAS wire, and the ground wire and the plurality of transmission line cores are distributed along the thickness direction of the miniSAS wire.
[0009] By adopting the above technical scheme, it is beneficial to further reduce the width of the miniSAS wire, so that the wire harness is more easily used in a limited space. Moreover, the situation that the ground wire is bent along the width direction with the transmission line core is also reduced, so that the ground wire is not easily cracked or broken during production and use. In addition, the ground wire is in abutment with the relatively flat shielding layer, the situation that the shielding layer is locally subjected to excessive stress is reduced, so that the shielding layer is not easily damaged due to fatigue.
[0010] Optionally, the material of the insulation layer is PTFE, the material of the shielding layer is hot-melt aluminum foil, the material of the wire harness sheath is PET, the ground wire is provided with two, the two ground wires are respectively located on the two sides of the transmission line core, and the materials of the two ground wires are both copper materials.
[0011] By adopting the above technical scheme, it is convenient to bend the wire harness under the premise of ensuring the shielding performance of the miniSAS wire.
[0012] A manufacturing process of a miniSAS wire is used for manufacturing the above miniSAS wire, and includes the following steps. S1, conveying each transmission line core in a horizontal direction and side by side; S2, winding the PTFE tape on each transmission line core, and forming an insulation layer through the PTFE tape; S3, conveying the transmission line core with the PTFE tape wound thereon, the hot-melt aluminum foil, and the two ground wires in a horizontal direction; The hot-melt aluminum foil is located at the bottom of the transmission line core with the PTFE tape wound thereon, one of the ground wires is located at the top of the transmission line core with the PTFE tape wound thereon, and the other ground wire is located at the bottom of the hot-melt aluminum foil; S4, bending the hot-melt aluminum foil along the width direction of the hot-melt aluminum foil by a straight wrapping die and wrapping the hot-melt aluminum foil on the insulation layer, and forming a shielding layer by the hot-melt aluminum foil; S5, winding the PET tape on the transmission line core, the hot-melt aluminum foil, and the two ground wires which are sequentially wrapped with the insulation layer and the shielding layer from inside to outside, and forming a wire harness outer skin by the PET tape.
[0013] Optionally, in the S4 step: The straight wrapping die comprises a die seat body and a bending groove body, the die seat body is horizontally provided with a die seat inlet and a die seat outlet, the bending groove body is located between the die seat inlet and the die seat outlet, the bending groove body is provided with a bending groove, the bending groove extends in the horizontal direction, the bending groove is provided with a contraction part, one side of the contraction part is higher than the other side, and the contraction part is closer to the die seat outlet than the die seat inlet; The hot-melt aluminum foil and the transmission line core wrapped with the PTFE tape are sequentially arranged in the die seat inlet, the bending groove, and the die seat outlet; The bending groove body is horizontally provided with a top inlet and a bottom inlet, the top inlet is located at the top of the bending groove, and the bottom inlet is located at the bottom of the bending groove; The ground wire with a larger height is sequentially arranged in the die seat inlet, the top inlet, and the die seat outlet, and the ground wire with a smaller height is sequentially arranged in the die seat inlet, the bottom inlet, and the die seat outlet.
[0014] By adopting the above technical solution, the wire harness is not easy to deviate from the original conveying direction during production, so that the transmission line core, the insulation layer, the shielding layer, the wire harness outer skin, and the ground wire can be distributed according to the design, and the occurrence of local structure deviation of the miniSAS wire is reduced.
[0015] Optionally, the bending groove body is slidably connected to the die seat body in the horizontal direction.
[0016] By adopting the above technical solution, after the bending groove body is slid, the PTFE tape will be wrapped on the transmission line core at different positions, so that timely adjustment can be made according to the equipment condition after the small transmission line core or the ground wire is broken.
[0017] Optionally, the straight wrapping die further comprises a deflection assembly, the deflection assembly comprises a deflection seat body, a deflection disc body, and a disc body driving member, the deflection seat body is installed on the die seat body, the deflection disc body is rotatably connected to the deflection seat body, and the deflection disc body is horizontally provided with a top outlet and a bottom outlet. The high-height grounding wire is sequentially arranged in the mold base entrance, the top entrance, and the top exit, and the low-height grounding wire is sequentially arranged in the mold base entrance, the low entrance, and the bottom exit. The disc body driving member is used to rotate the deflection disc body.
[0018] By adopting the above technical scheme, when the PET tape is wound on the grounding wire, the grounding wire is deflected towards the winding of the PET, so that the PET tape has a larger contact area when contacting the grounding wire, and the breaking of the thin grounding wire during the winding of the PET tape is reduced. Moreover, it is also beneficial to reduce the stress on the corners of the flat tape-shaped grounding wire and to reduce the occurrence of cracks or notches, thereby ensuring the production quality of the miniSAS wire.
[0019] Optionally, the deflection disc body is provided with a worm gear part, the disc body driving member is a worm, the disc body driving member is rotationally connected to the deflection seat body, and the disc body driving member is engaged with the deflection disc body.
[0020] By adopting the above technical scheme, when the disc body driving member rotates, the deflection disc body is driven to rotate slowly, which is beneficial to the fine adjustment of the angle of the deflection disc body by the worker, and is beneficial to reducing the influence of the large angle of the deflection disc body on the conveying.
[0021] Optionally, in the S4 step: Before the hot melt aluminum foil is bent along the width direction of the hot melt aluminum foil and wrapped on the insulation layer by the straight wrapping mold, the deflection disc body is rotated in the deflection direction R1 by the disc body driving member, and the deflection direction R1 is opposite to the winding direction R2 of the PET tape in the S5 step.
[0022] By adopting the above technical scheme, the breaking of the thin grounding wire during the winding of the PET tape is reduced.
[0023] Optionally, the deflection disc body is slidingly connected with a pressing plate, an elastic member is arranged between the pressing plate and the deflection disc body, the pressing plate is rotationally connected with a pressing wheel, and the pressing wheel extends into the top exit or the bottom exit.
[0024] By adopting the above technical scheme, when the deflection disc body rotates, the pressing plate presses the grounding wire, so that the grounding wire is not easy to be laterally deviated at the top exit or the bottom exit, thereby reducing the occurrence of the corner lifting or cracking of the grounding wire.
[0025] In summary, the present application has at least one of the following beneficial technical effects: The flat, ribbon-shaped grounding wire fits more easily against the surface of the shielding layer, allowing for a smaller cross-section of the miniSAS wire, making it easier to use in confined spaces. It also reduces the gap between the wire harness sheath and the shielding layer, preventing dirt accumulation after cutting and minimizing shielding layer wear from the grounding wire. Furthermore, the larger area of the flat, ribbon-shaped grounding wire facing the transmission core provides some shielding, further reducing interference between bundled miniSAS wires. This allows for further reduction in the width of the miniSAS cable, making the harness easier to use in limited spaces. It also reduces the likelihood of the grounding wire bending along the width direction with the transmission core, thus making it less prone to cracking or breakage during production and use. Furthermore, it allows the grounding wire to contact a relatively straight shielding layer, reducing excessive local stress on the shielding layer and making it less susceptible to fatigue damage. Attached Figure Description
[0026] Figure 1 This is a cross-sectional view of the miniSAS line in the background art of this application.
[0027] Figure 2 This is a cross-sectional view of the miniSAS line in Embodiment 1 of this application.
[0028] Figure 3 This is a first overall schematic diagram of the direct packaging mold in Embodiment 3 of this application.
[0029] Figure 4 This is a second overall schematic diagram of the direct packaging mold in Embodiment 3 of this application.
[0030] Figure 5 This is a schematic diagram of the inlet of the straight mold base and the bending groove in Embodiment 3 of this application.
[0031] Figure 6 This is an overall schematic diagram of the deflection component in Embodiment 3 of this application.
[0032] Figure 7 This is a schematic diagram of the implementation of the direct packaging mold in Embodiment 3 of this application.
[0033] Figure 8 This is a schematic diagram of step S5, miniSAS wire wrapping of PET tape, in Embodiment 3 of this application.
[0034] Figure 9 This is a cross-sectional schematic diagram of the deflection component in Embodiment 4 of this application.
[0035] Explanation of reference numerals in the attached drawings: 1. Transmission wire core; 2. Insulation layer; 3. Shielding layer; 31. Hot melt aluminum foil; 4. Wire harness outer sheath; 41. PET tape; 5. Grounding wire; 6. Mold base; 601. Mold base inlet; 602. Mold base outlet; 603. Base groove; 7. Bending groove; 701. Bending guide groove; 702. Shrinkage section; 703. Top inlet; 704. Bottom inlet; 8. Deflection assembly; 801. Disc through groove; 802. Top outlet; 803. Bottom outlet; 81. Deflection base; 82. Deflection disc; 821. Worm gear; 822. Pressing plate; 823. Elastic element; 824. Pressing wheel; 83. Disc drive component. Detailed Implementation
[0036] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.
[0037] Example 1: This application discloses a miniSAS line. (Refer to...) Figure 2 The miniSAS cable includes a transmission core 1, an insulation layer 2, a shielding layer 3, a wire harness outer sheath 4, and a grounding wire 5. Several transmission cores 1 are provided, with two transmission cores 1 arranged side-by-side along the width direction of the miniSAS cable. Specifically, in this embodiment, there are two transmission cores 1. The cross-section of the transmission core 1 is circular. The transmission core 1 includes a conductive core and an insulating outer sheath. The conductive core is made of copper, and the insulating outer sheath is made of fluorinated ethylene propylene copolymer (FEP). The insulating outer sheath covers the conductive core to ensure insulation between two adjacent conductive cores and reduce interference during signal transmission.
[0038] Insulation layer 2 covers the two transmission cores 1, and the cross-section of insulation layer 2 is elliptical. The material of insulation layer 2 is polytetrafluoroethylene (PTFE). Shielding layer 3 covers insulation layer 2, and the cross-section of shielding layer 3 is also elliptical. The material of shielding layer 3 is hot-melt aluminum foil 31, and a hot-melt aluminum foil 31 with a hot-melt adhesive layer and an aluminum foil layer, known in the art, is selected. The hot-melt aluminum foil 31 is bonded to the outside of insulation layer 2 by the hot-melt adhesive layer. Wire harness sheath 4 covers shielding layer 3, and the cross-section of wire harness sheath 4 is also elliptical. The material of wire harness sheath 4 is polyethylene terephthalate (PET) to make shielding layer 3 less prone to damage.
[0039] Reference Figure 2Two grounding wires 5 are provided, located on opposite sides of the transmission core 1, and oriented opposite each other along the thickness direction of the miniSAS line to further reduce the size of the miniSAS line. The grounding wire 5 is located between the shielding layer 3 and the outer sheath 4 of the wire harness, with both layers attached to it. The width of the grounding wire 5 is consistent with the width direction of the miniSAS line. The grounding wires 5 are made of copper and extend along the length of the miniSAS line. The grounding wire 5 is generally arranged in a flat strip shape with a rectangular cross-section.
[0040] In this embodiment, the grounding wire 5 has a width of 0.7 mm and a thickness of 0.025 mm. For the grounding wire 5, which is arranged in a flat strip shape and distributed along the thickness direction of the miniSAS line, on the one hand, it helps to further reduce the width of the miniSAS line, making the wire harness easier to use in a limited space. On the other hand, it also reduces the occurrence of the grounding wire 5 bending along the width direction with the transmission core 1, thus making the grounding wire 5 less prone to cracking or breakage during production and use. Furthermore, it allows the grounding wire 5 to abut against the relatively straight shielding layer 3, reducing the possibility of excessive local stress on the shielding layer 3, making the shielding layer 3 less prone to fatigue damage.
[0041] The implementation principle of the miniSAS cable in Embodiment 1 of this application is as follows: The flat strip-shaped grounding wire 5 is easier to adhere to the surface of the shielding layer 3, making it easier to reduce the cross-section of the miniSAS cable, thus making it easier to use in limited spaces. Furthermore, it also helps to reduce the gap between the cable bundle sheath 4 and the shielding layer 3, preventing dirt from accumulating between them after the cable bundle is cut, and reducing the likelihood of the shielding layer 3 being worn by the grounding wire. Simultaneously, the flat strip-shaped grounding wire 5 has a larger area facing the transmission core 1, which also provides a certain degree of shielding, thus reducing the likelihood of mutual interference between bundled miniSAS cables.
[0042] Example 2: This application discloses a manufacturing process for a miniSAS line, used to manufacture the miniSAS line described in Example 1, including the following steps: S1. Transport each transmission core 1 side by side in the horizontal direction.
[0043] S2. A wrapping process is adopted, using an existing horizontal wrapping machine to wrap PTFE tape around each transmission line core 1, and forming an insulation layer 2 through the PTFE tape. During wrapping, the overlap rate is 50±10%. The overlap rate refers to the proportion of the width of the tape material overlapping with the previous spiral portion to the total width of the tape material.
[0044] S3. Horizontally conveying: a transmission core 1 wound with PTFE tape, a hot-melt aluminum foil 31, and two grounding wires 5. The hot-melt aluminum foil 31 is located at the bottom of the transmission core 1 wound with PTFE tape, one grounding wire 5 is located at the top of the transmission core 1 wound with PTFE tape, and the other grounding wire 5 is located at the bottom of the hot-melt aluminum foil 31.
[0045] During horizontal conveying, the transmission core 1 wrapped with PTFE tape, the hot-melt aluminum foil 31, and the two grounding wires 5 are tensioned. The tension of each wire is detected to determine whether the tension received by each wire is within an appropriate range, so as to reduce the occurrence of thin wires breaking due to excessive tension.
[0046] S4. Using a direct wrapping process, the hot-melt aluminum foil 31 is bent along its width direction and wrapped around the insulating layer 2 using an existing direct wrapping mold, and a shielding layer 3 is formed by the hot-melt aluminum foil 31. When the hot-melt aluminum foil 31 is wrapped around the insulating layer 2, the length direction of the hot-melt aluminum foil 31 extends along the length direction of the miniSAS line to ensure the integrity of the shielding layer 3, making the wire harness less prone to interference when transmitting high-frequency signals.
[0047] S5. Using a wrapping process, a horizontal wrapping machine wraps PET tape 41 around the transmission core 1, hot-melt aluminum foil 31, and two grounding wires 5, which are wrapped sequentially from the inside out, and forms the outer sheath 4 of the wire harness through PET tape 41.
[0048] Example 3: This application discloses a direct packaging mold for use in step S4 of Example 2, referring to... Figure 3 The system includes a mold base 6 and a bending groove 7. The mold base 6 has a horizontally extending mold base inlet 601 and a mold base outlet 602. The wire harness enters the straight-pack mold through the mold base inlet 601 and exits the straight-pack mold through the mold base outlet 602. The bending groove 7 is located between the mold base inlet 601 and the mold base outlet 602. The bending groove 7 has a bending guide groove 701, which allows the hot-melt aluminum foil 31 and the transmission wire core 1 wrapped with PTFE tape to be sequentially passed through the mold base inlet 601, the bending guide groove 701, and the mold base outlet 602.
[0049] Reference Figure 3 and Figure 4The mold base 6 has two base grooves 603, which are located on both sides of the bending groove 7. The base grooves 603 extend through the thickness of the mold base 6 and horizontally along the length of the mold base 6. The bending groove 7 slides horizontally with the mold base 6 through the base grooves 603 to facilitate adjustment of its working position. Specifically, the bending groove 7 is installed on the mold base 6 by bolts that pass vertically through itself and the base grooves 603, and by nuts (not shown in the figure). This allows the bending groove 7 to adjust its position by loosening the nuts and to quickly lock its position by tightening the nuts.
[0050] Reference Figure 4 and Figure 5 The bending guide groove 701 extends horizontally and has a contraction section 702. The contraction section 702 is closer to the mold outlet 602 than the mold base inlet 601, and the inner wall height of one side of the contraction section 702 is greater than the inner wall height of the other side. The hot-melt aluminum foil 31 gradually curls within the contraction section 702, and under the action of the side with the smaller inner wall height of the contraction section 702, one side of the hot-melt aluminum foil 31 will bend more, so that the hot-melt aluminum foil 31 on that side is located at the bottom of the other side when it is wrapped around the wire harness, thereby directly wrapping the hot-melt aluminum foil 31 around the surface of the wire harness.
[0051] The bending groove 7 has a horizontally penetrating top inlet 703 and a bottom inlet 704, which are vertically distributed along the thickness direction of the mold base 6. The openings of the top inlet 703 and the bottom inlet 704 are rounded. The top inlet 703 is located at the top of the bending guide groove 701, and the bottom inlet 704 is located at the bottom of the bending guide groove 701. In step S4, the taller grounding wire 5 is sequentially passed through the mold base inlet 601, the top inlet 703, and the mold base outlet 602, while the shorter grounding wire 5 is sequentially passed through the mold base inlet 601, the bottom inlet 704, and the mold base outlet 602, so that the two grounding wires 5 are less likely to interfere with each other during conveying and wrapping.
[0052] Reference Figure 4 The direct-package mold also includes a deflection assembly 8, which is located between the outlet of the shrinkage section 702 and the mold base outlet 602. Figure 6The deflection assembly 8 includes a deflection seat 81, a deflection disc 82, and a disc drive 83. The deflection seat 81 is installed on the mold base 6 by bolts passing through itself and the seat groove 603, and with nuts, so as to facilitate the adjustment of the installation position of the deflection seat 81. The deflection disc 82 is rotatably fitted to the deflection seat 81 by bearings. The deflection disc 82 has a horizontal through-hole 801, a top outlet 802, and a bottom outlet 803. The through-hole 801 is used for the hot-melt aluminum foil 31 and the transmission core 1 wrapped with PTFE tape to pass through the deflection assembly 8.
[0053] Reference Figure 7 The taller grounding wire 5 is sequentially threaded through the mold base inlet 601 and the top inlet 703, then through the top outlet 802, and finally exits the mold from the mold base outlet 602. The shorter grounding wire 5 is sequentially threaded through the mold base inlet 601 and the bottom inlet, then through the bottom outlet 803, and finally exits the mold from the mold base outlet 602. By rotating the deflector plate 82, the two grounding wires 5 can be tilted as the deflector plate 82 rotates.
[0054] Reference Figure 8 When the PET strip 41 is wound around the grounding wire 5, the deflection disk 82 rotates in the deflection direction R1, which is opposite to the winding direction R2 of the PET strip 41 in step S5. When the PET strip 41 first contacts the grounding wire 5, it has a large contact area, which helps reduce the likelihood of the thin grounding wire 5 breaking during the winding process. Furthermore, it also helps reduce the possibility of excessive stress on the edges and corners of the flat grounding wire 5, leading to cracks or gaps, thus ensuring the production quality of the miniSAS line.
[0055] The disc drive 83 is located at the top of the deflection disc 82 and is used to rotate the deflection disc 82. Specifically, the deflection disc 82 is provided with a worm gear 821, the shape and specifications of which are set according to the worm gear 821 of a conventional worm wheel. The disc drive 83 is a worm gear, which is rotatably fitted to the deflection seat 81 and meshes with the deflection disc 82. By rotating the disc drive 83, the deflection disc 82 is driven to rotate slowly, which allows the operator to finely adjust the angle of the deflection disc 82 and reduces the possibility of the deflection disc 82 being too large and affecting the conveying process. The end of the disc drive 83 is cylindrical and has a screw hole, allowing the operator to rotate the disc drive 83 using a suitable screwdriver or other tools.
[0056] Example 4: This application discloses a direct packaging mold, which, in addition to all the technical features of Example 3, also includes the following technical features: The deflector plate 82 has two pressing plates 822 that slide radially along a slide rod. The two pressing plates 822 are distributed along the radial direction of the deflector plate 82. An elastic element 823, which is a corrugated metal plate, is provided between the pressing plate 822 and the deflector plate 82. The pressing plate 822 and the deflector plate 82 are respectively attached to both sides of the elastic element 823. The pressing plate 822 of the elastic element 823 is rotatably fitted with pressing rollers 824. The corresponding pressing rollers 824 of the two pressing plates 822 extend into the top outlet 802 and the bottom outlet 803, respectively, to press against the grounding wire 5 that passes through the top outlet 802 or the bottom outlet 803. This makes it less likely for the grounding wire 5 to shift laterally at the top outlet 802 or the bottom outlet 803, thereby reducing the occurrence of corner warping or cracking of the grounding wire 5.
[0057] Example 5: This application discloses step S4 of a manufacturing process for a miniSAS line, including the following technical features: S4. The deflection disk 82 is rotated along the deflection direction R1 by the disk driving component 83. Then, the hot-melt aluminum foil 31 is bent along its own width direction and wrapped around the insulating layer 2 by the hot-melt aluminum foil 31 through the direct wrapping mold described in Example 3 or Example 4, and a shielding layer 3 is formed by the hot-melt aluminum foil 31.
[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A miniSAS line, characterized in that: It includes a transmission core (1), an insulation layer (2), a shielding layer (3), a wire harness sheath (4), and a grounding wire (5). The transmission core (1) is provided in a plurality of places, and the plurality of transmission cores (1) are arranged side by side along the width direction of the miniSAS line. The insulation layer (2) covers each transmission core (1), the shielding layer (3) covers the insulation layer (2), and the wire harness sheath (4) covers the shielding layer (3). The grounding wire (5) is located between the shielding layer (3) and the wire harness sheath (4), and both the shielding layer (3) and the wire harness sheath (4) are attached to the grounding wire (5). The grounding wire (5) is arranged in a flat strip shape, extends along the length direction of the miniSAS line, and the cross-section of the grounding wire (5) is rectangular.
2. The miniSAS line according to claim 1, characterized in that: The width direction of the grounding wire (5) is consistent with the width direction of the miniSAS line, and the grounding wire (5) and several transmission cores (1) are distributed along the thickness direction of the miniSAS line.
3. A miniSAS line according to claim 1 or 2, characterized in that: The insulating layer (2) is made of PTFE, the shielding layer (3) is made of hot melt aluminum foil (31), the outer sheath of the wire harness (4) is made of PET, and there are two grounding wires (5). The two grounding wires (5) are located on both sides of the transmission core (1), and the two grounding wires (5) are made of copper.
4. A manufacturing process for a miniSAS line, characterized in that: The method for manufacturing the miniSAS line of claim 3 includes the following steps: S1. Each of the transmission cores (1) is transported side by side in the horizontal direction; S2. Wrap PTFE tape around each transmission core (1) and form an insulation layer (2) through the PTFE tape; S3. Horizontal conveying: transmission core (1) wound with the PTFE tape, the hot melt aluminum foil (31) and the two grounding wires (5); The hot melt aluminum foil (31) is located at the bottom of the transmission core (1) wrapped with PTFE tape, one of the grounding wires (5) is located at the top of the transmission core (1) wrapped with PTFE tape, and the other grounding wire (5) is located at the bottom of the hot melt aluminum foil (31). S4. The hot-melt aluminum foil (31) is bent along its width direction and wrapped around the insulating layer (2) by a direct wrapping mold, and a shielding layer (3) is formed by the hot-melt aluminum foil (31); S5. Wrap the PET tape (41) around the transmission core (1), the hot melt aluminum foil (31), and the two grounding wires (5) that are sequentially covered by the insulation layer (2) and the shielding layer (3) from the inside out, and form the wire harness outer sheath (4) through the PET tape (41).
5. The manufacturing process of a miniSAS line according to claim 4, characterized in that: In step S4: The straight-pack mold includes a mold base (6) and a bending groove (7). The mold base (6) has a horizontally penetrating mold base inlet (601) and mold base outlet (602). The bending groove (7) is located between the mold base inlet (601) and the mold base outlet (602). The bending groove (7) has a bending guide groove (701) that extends horizontally. The bending guide groove (701) has a shrinkage portion (702) that is closer to the mold base outlet (602) than the mold base inlet (601). The inner wall height of one side of the shrinkage portion (702) is greater than the inner wall height of the other side. The hot-melt aluminum foil (31) and the transmission core (1) wrapped with the PTFE tape are sequentially inserted into the mold base inlet (601), the bending guide groove (701) and the mold base outlet (602); The bending groove (7) is horizontally provided with a top inlet (703) and a bottom inlet (704). The top inlet (703) is located at the top of the bending guide groove (701), and the bottom inlet (704) is located at the bottom of the bending guide groove (701). The taller grounding wire (5) is sequentially passed through the mold base inlet (601), top inlet (703) and mold base outlet (602), while the shorter grounding wire (5) is sequentially passed through the mold base inlet (601), bottom inlet (704) and mold base outlet (602).
6. The manufacturing process of a miniSAS line according to claim 5, characterized in that: The bending groove (7) slides horizontally and fits into the mold base (6).
7. The manufacturing process of a miniSAS line according to claim 5, characterized in that: The direct packaging mold also includes a deflection assembly (8), which includes a deflection seat (81), a deflection disc (82), and a disc drive (83). The deflection seat (81) is installed on the mold base (6), and the deflection disc (82) is rotatably fitted to the deflection seat (81). The deflection disc (82) has a top outlet (802) and a bottom outlet (803) horizontally through it. The taller grounding wire (5) is sequentially passed through the mold base inlet (601) and the top inlet (703) and then through the top outlet (802). The shorter grounding wire (5) is sequentially passed through the mold base inlet (601) and the bottom inlet and then through the bottom outlet (803). The disk drive (83) is used to rotate the deflection disk (82).
8. The manufacturing process of a miniSAS line according to claim 7, characterized in that: The deflection disk (82) is provided with a worm gear (821), the disk drive (83) is of the type of worm, the disk drive (83) is rotatably engaged with the deflection seat (81), and the disk drive (83) meshes with the deflection disk (82).
9. The manufacturing process of a miniSAS line according to claim 7, characterized in that: In step S4: Before the hot melt aluminum foil (31) is bent along its width direction and wrapped around the insulating layer (2) by the direct wrapping mold, the deflection disk (82) is rotated along the deflection direction R1 by the disk drive (83), the deflection direction R1 being opposite to the winding direction R2 of the PET tape (41) in step S5.
10. The manufacturing process of a miniSAS line according to claim 7, characterized in that: The deflection disk body (82) is slidably fitted with a pressing plate (822), and an elastic element (823) is provided between the pressing plate (822) and the deflection disk body (82). The pressing plate (822) is rotatably fitted with a pressing wheel (824), and the pressing wheel (824) extends into the top outlet (802) or the bottom outlet (803).