A method of moulding and potting a connector assembly

Abstract

The application discloses a method for pouring and forming a mold and a wiring assembly, the mold is configured to pour at least two conductors in the wiring assembly into one body, the mold comprises a mold body, a first positioning assembly and a second positioning assembly, the mold body has a mold cavity and at least two positioning channels which are communicated with the mold cavity and used for inserting the conductors into the mold cavity; the first positioning assembly is connected to the mold body or configured to connect the conductors, and is used for axial positioning of the conductors; and the second positioning assembly is configured to connect the conductors and used for circumferential positioning of the conductors. The application can pour multiple conductors into one body, and can ensure the integrity and stability of the wiring assembly.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a method for casting molds and wiring assemblies. Background Technology

[0002] In a magnetic resonance imaging system, gradient coils (G) generate local gradient magnetic fields by passing current through them according to electromagnetic principles. Technically, corresponding gradient coils Gx, Gy, and Gz need to be installed in the X, Y, and Z directions. This current is then provided and driven by a gradient amplifier (GPA). Pulsed current is transmitted from the gradient amplifier to the gradient coils through the gradient coil cable assembly, and these three individual coils require three separate sets of cables to transmit the current.

[0003] Currently, in high-field magnetic resonance imaging systems, the current flowing through the power supply cable of the gradient coil is usually above 1,000 amperes, and the switching rate of the pulse current reaches hundreds of A / s (amperes per second). When such a high rate of change of current and current value act on a magnetic field of several terabytes, the strong Lorentz force will cause the power supply cable to oscillate violently in the strong magnetic field. Therefore, one proposed solution is to fix the conductor rod into a whole by casting. However, the existing technology lacks a mold for casting multiple conductor rods into a whole. Summary of the Invention

[0004] In view of this, it is necessary to provide a method for casting molds and wiring assemblies to solve the technical problem of the lack of a mold for casting multiple conductor rods into a whole in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a mold configured to cast at least two conductors in a wiring assembly into a single unit, the mold comprising:

[0006] A mold body having a cavity and at least two positioning channels communicating with the cavity and used for inserting the conductor into the cavity;

[0007] A first positioning component, connected to the mold body or configured for connecting the conductor, is used for axial positioning of the conductor; and

[0008] The second positioning component is configured to connect the conductor and for circumferential positioning of the conductor.

[0009] In one embodiment, the positioning channel extends through one side of the mold body, and the other side of the mold body has an opening communicating with the cavity, so that the conductor can extend out of the mold body through the positioning channel and the opening.

[0010] In one embodiment, the first positioning component is configured to fit over the conductor and abut against the inner wall of the cavity.

[0011] In one embodiment, a sealing ring is further included, the sealing ring being configured to sleeve the conductor and disposed between the first positioning component and the inner wall of the cavity, the sealing ring being used to block the communication between the cavity and the positioning channel.

[0012] In one embodiment, the width of the cavity at one end relative to the conductor is greater than the width of the cavity at the other end relative to the conductor.

[0013] In one embodiment, the mold body includes a first mold body, a second mold body, and a third mold body. The first mold body and the second mold body are detachably connected and together form a cavity with openings at both ends. The third mold body is disposed at one end of the cavity and is detachably connected to the first mold body and the second mold body. The third mold body, the first mold body, and the second mold body together form the cavity. The third mold body has a positioning channel that communicates with the cavity.

[0014] In one embodiment, a first mounting cavity is formed at the connection between the first mold body and the second mold body, and a second mounting cavity is formed at the connection between the third mold body and the first mold body and the second mold body. The second mounting cavity is disposed around the ends of the first mold body and the second mold body. The mold body also includes a first sealing strip and a second sealing strip. The first sealing strip is embedded in the first mounting cavity for sealing connection between the first mold body and the second mold body, and the second sealing strip is embedded in the second mounting cavity for sealing connection between the third mold body and the first mold body and the second mold body.

[0015] In one embodiment, the third mold body is formed with a plurality of first fixing positions for detachably fixing the insert into the cavity.

[0016] The present invention also provides a method for casting and molding a wiring assembly, using the above-mentioned mold, and the specific process steps are as follows:

[0017] Connect the first positioning component to the conductor;

[0018] At least two of the conductors are housed within the cavity and inserted into the positioning channel, wherein the first positioning component is used to position the conductors axially.

[0019] A second positioning component is connected to the conductor, the second positioning component being used to position the conductor circumferentially;

[0020] An insulating fluid is injected into the cavity, at least two of the conductors are cast together with the insulating fluid, and the cast component is separated from the mold body.

[0021] In one embodiment, the step of injecting an insulating fluid into the cavity is further included:

[0022] The filler is fitted onto each of the conductors;

[0023] The cooling conduit is passed through the filler and made to fit the conductor.

[0024] Compared with the prior art, the beneficial effects of the present invention include: when multiple conductors need to be cast into a whole, the conductors are placed inside the cavity and inserted into the positioning channel. Then, a first positioning component is connected to the mold body or the conductor, and the conductor is positioned axially by the first positioning component. A second positioning component is connected to each conductor, and the conductor is positioned circumferentially by the second positioning component. Then, an insulating fluid is injected into the cavity, and the insulating fluid wraps around part of the conductor. After the insulating fluid solidifies, the casting formed by the insulating fluid and the conductor solidify to form a wiring assembly. Then, the formed wiring assembly is separated from the mold body, thus obtaining the solidified wiring assembly. The integral wiring assembly supplies power to the gradient coil in the magnetic resonance imaging system, which can ensure the integrity and stability of the wiring assembly. By positioning the conductor axially and circumferentially, the axial and circumferential positions of the conductor are consistent when the wiring assembly is mass-produced through the mold body, which facilitates the mass production of wiring assemblies. Attached Figure Description

[0025] Figure 1 This is an exploded view of the mold according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0027] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle.

[0028] Figure 4 This is a three-dimensional schematic diagram of a mold according to an embodiment of the present invention;

[0029] Figure 5 This is a three-dimensional schematic diagram of the mold and device according to an embodiment of the present invention after the second mold body is hidden;

[0030] Figure 6 yes Figure 5 A magnified view of a portion of point C in the middle;

[0031] Figure 7 This is a cross-sectional view of the mold according to an embodiment of the present invention;

[0032] Figure 8 yes Figure 7 A magnified view of a portion of point D in the middle;

[0033] Figure 9 This is a three-dimensional schematic diagram of the second positioning component, wiring component, cooling pipe, filler, protrusion and insert in the mold according to an embodiment of the present invention;

[0034] Figure 10 yes Figure 9 A magnified view of a portion of point E in the middle;

[0035] Figure 11 This is a three-dimensional schematic diagram of the wiring assembly, cooling pipe, filler, protrusion and insert in the mold according to an embodiment of the present invention;

[0036] Figure 12 This is a three-dimensional schematic diagram of a wiring assembly cast in a mold according to an embodiment of the present invention;

[0037] Figure 13 This is a three-dimensional schematic diagram of the connection assembly and gradient coil in the mold according to an embodiment of the present invention;

[0038] Figure 14 This is a schematic diagram of the structure of the wiring assembly and gradient coil connected in the mold according to an embodiment of the present invention;

[0039] Figure 15 yes Figure 14 A magnified view of a portion of point F in the middle.

[0040] Figure label:

[0041] Wiring assembly 1;

[0042] Conductor 11;

[0043] Second plane 11a;

[0044] First positioning hole 11b;

[0045] Cooling pipe 12;

[0046] Filler 13;

[0047] Fixed groove 13a;

[0048] Protrusion 14;

[0049] Insert 15;

[0050] Mold body 2;

[0051] Cavity 2a;

[0052] Positioning channel 2b;

[0053] First module 21;

[0054] Second module 22;

[0055] Surface 22a;

[0056] Third module 23;

[0057] Annular cavity 23a;

[0058] First mounting cavity 24;

[0059] Second mounting cavity 25;

[0060] First sealing strip 26;

[0061] Second sealing strip 27;

[0062] First positioning component 3;

[0063] Second positioning component 4;

[0064] First plane 4a;

[0065] Second positioning hole 4b;

[0066] Sealing ring 5;

[0067] Positioning plate 6;

[0068] Gradient coil 7. Detailed Implementation

[0069] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0070] Please see Figures 1 to 15 The present invention provides a mold that can be applied to a magnetic resonance imaging system for casting multiple conductors 11 into an integral wiring assembly 1, and can ensure that each conductor 11 is fixed and positioned during the casting process. When the integrally formed wiring assembly 1 supplies power to the gradient coil 7 in the magnetic resonance imaging system, it can ensure the integrity and stability of the wiring assembly 1.

[0071] Understandably, conductor 11 can be a columnar, rod-shaped, bar-shaped, strip-shaped, or sheet-shaped component.

[0072] It should be noted that the mold of the present invention is used in, but not limited to, magnetic resonance imaging systems, and can also be applied to other devices that require casting conductors 11 into a single unit. In this invention, only the application of the mold to a magnetic resonance imaging system is used as an example for explanation, while the principle of applying the mold to casting other types of conductors 11 is essentially the same as that applied to magnetic resonance imaging systems, and will not be elaborated here.

[0073] like Figure 1 , 7 As shown in Figure 8, in one embodiment, the present invention provides a mold configured to cast at least two conductors 11 in a wiring assembly 1 into a single unit. The mold includes a mold body 2, a first positioning component 3, and a second positioning component 4. The mold body 2 has a cavity 2a and at least two positioning channels 2b connected to the cavity 2a and used for inserting the conductors 11 into the cavity 2a. The first positioning component 3 is connected to the mold body 2 or configured to connect the conductors 11. The first positioning component 3 is used for axial positioning of the conductors 11. The second positioning component 4 is configured to connect the conductors 11 and for circumferential positioning of the conductors 11.

[0074] When multiple conductors 11 need to be cast into a whole, the conductors 11 are placed inside the cavity 2a and inserted into the positioning channel 2b. Then, the first positioning component 3 is connected to the mold body 2 or the conductors 11 to position the conductors 11 axially. The second positioning component 4 is connected to each conductor 11 to position the conductors 11 circumferentially. Alternatively, the second positioning component 4 can be used to connect the conductors 11 and the mold body 2 to position the conductors 11 circumferentially. Then, an insulating fluid is injected into the cavity 2a to wrap a part of the conductors 11. After the insulating fluid solidifies, the casting formed by the insulating fluid and the conductors 11 solidify to form the wiring assembly 1. Then, the cast wiring assembly 1 is separated from the mold body 2. By powering the gradient coil 7 in the magnetic resonance imaging system through the overall wiring assembly 1, the integrity and stability of the wiring assembly 1 can be guaranteed, thus solving problems such as the conductor 11 being subjected to force and vibration in a strong magnetic field and the local high resistance caused by the loose connection of the conductor 11 joint, which leads to overheating. By positioning the conductor 11 in the axial and circumferential directions, the axial and circumferential positions of the conductor 11 are consistent when the wiring assembly 1 is mass-produced through the mold body 2, which facilitates the mass production of the wiring assembly 1.

[0075] It is understandable that the number of conductors 11 to be cast into one piece can be two, three, four, five, six, etc., and the number of positioning channels 2b can be two, three, four, five, six, etc.

[0076] In one embodiment, the number of conductors 11 to be cast into one piece is six. The six conductors 11 are parallel to each other and spaced apart after being cast into one piece. The positioning channel 2b is set in a one-to-one correspondence with the conductors 11.

[0077] Understandably, cavity 2a can be fan-shaped, rectangular, or arc-shaped, etc.

[0078] In one embodiment, the cavity 2a is fan-shaped.

[0079] By setting the cavity 2a in a fan shape, the cured wiring assembly 1 is fan-shaped, and the cooperation of multiple fan-shaped wiring assemblies 1 can form a structure that can cooperate with the cylindrical gradient coil 7.

[0080] Understandably, at least two positioning channels 2b can be interconnected or spaced apart; the positioning channel 2b can be a through hole that matches the outer diameter of the conductor 11, or it can be a square hole, polygonal hole, etc., with its inner wall abutting against the conductor 11.

[0081] like Figure 8 As shown, in one embodiment, the positioning channel 2b passes through one side of the mold body 2, and the other side of the mold body 2 has an opening that communicates with the cavity 2a, so that the conductor 11 can extend outward from the mold body 2 through the opening and the positioning channel 2b.

[0082] Since the two ends of conductor 11 need to be electrically connected to other equipment, in order to avoid the two ends of conductor 11 being covered by insulating fluid, in this embodiment, the positioning channel 2b passes through one side of the mold body 2, and an opening communicating with the cavity 2a is provided on the other side of the mold body 2, so that the two ends of conductor 11 can extend outward from the mold body 2 through the opening and the positioning channel 2b, avoiding the ends of conductor 11 being covered by insulating fluid. Moreover, after conductor 11 extends outward through the opening and the positioning channel 2b, the second positioning component 4 can connect conductor 11 to any end of the mold body 2, so that the second positioning component 4 can be set at any end of the mold body 2.

[0083] like Figure 7 As shown, in one embodiment, the width of the cavity 2a at one end relative to the conductor 11 is greater than the width of the cavity 2a at the other end relative to the conductor 11.

[0084] like Figure 7 , Figures 12 to 15As shown, an insulating fluid is injected into the cavity 2a. After the insulating fluid cools and solidifies, it forms a wiring assembly 1 that matches the size of the cavity 2a. One end of the wiring assembly 1 is wider than the other end. When the wiring assembly 1 is connected to the gradient coil 7, the wider end of the wiring assembly 1 is fitted into the gradient coil 7. The wider end of the wiring assembly 1 and the gradient coil 7 form a snap-fit ​​structure, which can prevent the wiring assembly 1 from sliding out of the gradient coil 7, so that the assembled wiring assembly 1 and the gradient coil 7 are firmly connected.

[0085] Understandably, the mold body 2 can be a single mold that is hollow inside and open on one side; the mold body 2 can also be formed by two or three mold bodies joined together.

[0086] like Figure 1 and Figure 7 As shown, in one embodiment, the mold body 2 includes a first mold body 21, a second mold body 22 and a third mold body 23. The first mold body 21 and the second mold body 22 are detachably connected and together form a cavity with openings at both ends. The third mold body 23 is disposed at one end of the cavity and is detachably connected to the first mold body 21 and the second mold body 22. The third mold body 23, the first mold body 21 and the second mold body 22 together form a cavity 2a. The third mold body 23 has a positioning channel 2b that communicates with the cavity 2a.

[0087] If the mold body 2 is a single mold, it is necessary to use equipment to carve out the cavity 2a and positioning channel 2b inside the mold body 2, which is difficult to process. If the mold body 2 is divided into a left mold body and a right mold body, it is necessary to process the ends of the left mold body and / or the right mold body to block the cavity 2a and be perpendicular to itself, which is also difficult to process. In this invention, the mold body 2 is divided into a first mold body 21, a second mold body 22 and a third mold body 23. The first mold body 21, the second mold body 22 and the third mold body 23 can be spliced ​​together to form the cavity 2a and positioning channel 2b mentioned above. The first mold body 21, the second mold body 22 and the third mold body 23 can be processed separately and then spliced ​​together. It is not necessary to process by hollowing out the inside, and it is not necessary to process a structure that is connected to the first mold body 21 or the second mold body 22 and is perpendicular to it, so the processing difficulty is relatively small.

[0088] It is understandable that the first mold 21 and the second mold 22 can be detachably connected by screws, bolts, clips, etc., and the third mold 23 can be detachably connected to the first mold 21 and the second mold 22 by screws, bolts, clips, etc.

[0089] like Figure 7 As shown, in one embodiment, the inner wall of the second mold 22 away from the third mold 23 is an inclined curved surface 22a, and the curved surface 22a gradually moves away from the first mold 21 along the opening direction of the cavity 2a.

[0090] With the above settings, the width of the cavity formed by the curved surface 22a and the first mold body 21 gradually increases along the opening direction of the cavity 2a, so that the width of one side of the cavity 2a is greater than the width of the other side of the cavity 2a.

[0091] like Figures 1 to 6 As shown, in one embodiment, a first mounting cavity 24 is formed at the connection between the first mold body 21 and the second mold body 22, and a second mounting cavity 25 is formed at the connection between the third mold body 23 and the first mold body 21 and the second mold body 22. The second mounting cavity 25 is arranged around the ends of the first mold body 21 and the second mold body 22. The mold body 2 also includes a first sealing strip 26 and a second sealing strip 27. The first sealing strip 26 is embedded in the first mounting cavity 24 for sealing connection between the first mold body 21 and the second mold body 22, and the second sealing strip 27 is embedded in the second mounting cavity 25 for sealing connection between the third mold body 23 and the first mold body 21 and the second mold body 22.

[0092] Because the first mold body 21, the second mold body 22, and the third mold body 23 are detachably connected, gaps may exist between the first mold body 21 and the second mold body 22, and gaps may also exist between the third mold body 23 and the first mold body 21 and the second mold body 22. When insulating fluid is injected into the cavity 2a, it may flow outward from these gaps. In this invention, a first mounting cavity 24 is provided at the connection between the first mold body 21 and the second mold body 22, and a first sealing strip 26 is embedded in the first mounting cavity 24. The first sealing strip 26 seals the connection between the first mold body 21 and the second mold body 22, preventing leakage at the connection. A second mounting cavity 25 is provided at the connection between the third mold body 23 and the first mold body 21 and the second mold body 22, and a second sealing strip 27 is embedded in the second mounting cavity 25. The second sealing strip 27 seals the connection between the third mold body 23 and the first mold body 21 and the second mold body 22, preventing leakage at the connection.

[0093] Understandably, the first mounting cavity 24 can be a first mounting slot opened in either the first mold 21 or the second mold 22, and then the first mounting slot and the other mold 22 together enclose the first mounting cavity 24; the first mounting cavity 24 can also be formed by the enclosing of the first mounting slots opened in both the first mold 21 and the second mold 22. The second mounting cavity 25 can be formed by the enclosing of the second mounting slots opened in the first mold 21 and the second mold 22 and the third mold 23; the second mounting cavity 25 can also be formed by the enclosing of the second mounting slot opened in the third mold 23 and the first mold 21 and the second mold 22; the second mounting cavity 25 can also be formed by the enclosing of the second mounting slots opened in the first mold 21, the second mold 22 and the third mold 23.

[0094] In one embodiment, the third mold body 23 is formed with a plurality of first fixing positions for detachably fixing the insert 15 into the cavity 2a.

[0095] When it is necessary to fix the insert 15 in the cavity 2a so that the insert 15 and the insulating fluid are integrally formed, the insert 15 is fixed in the first fixed position. After casting, the insert 15 is separated from the first fixed position, so that the insert 15 and the insulating fluid are solidified into one.

[0096] like Figure 1 and Figure 5 As shown, in one embodiment, the first fixing position is a through hole opened in the third mold body 23, and the through hole is connected to the cavity 2a.

[0097] One end of the insert 15 has a threaded hole. The screw is passed through the through hole and threaded to the insert 15, so that the insert 15 can be detachably fixed to the third mold body 23. After casting, the insert 15 is embedded in the wiring assembly 1. Rotating the screw separates the screw from the insert 15. The threaded hole of the insert 15 can be used to assist in the positioning of the gradient coil 7 when the wiring assembly 1 is connected to the gradient coil 7.

[0098] like Figure 1 As shown, in one embodiment, the mold further includes a positioning plate 6, which is disposed on the side of the cavity 2a away from the positioning channel 2b and is detachably connected to the first mold body 21 and / or the second mold body 22. The positioning plate 6 has a plurality of second fixing positions on the side opposite to the positioning channel 2b, and the insert 15 can be detachably fixed to the second fixing positions and built into the cavity 2a.

[0099] By setting the positioning plate 6, the positioning plate 6 can temporarily fix the insert 15. After the insulating fluid solidifies the insert 15 and the conductor 11 into one, the positioning plate 6 is separated from the insert 15, so that the insert 15 and the conductor 11 are integrally formed. After the insert 15 and the conductor 11 are integrally formed, the insert 15 is separated from the positioning plate 6.

[0100] Understandably, the positioning plate 6 can be detachably connected to the first mold body 21 and / or the second mold body 22 by bolts, clips, etc.; the insert 15 and the first fixed position can be detachably connected by bolts, screws, clips, etc.

[0101] like Figure 1 and Figure 5 As shown, in one embodiment, the second fixing position is a through hole opened in the positioning plate 6, and the through hole is connected to the cavity 2a.

[0102] One end of the insert 15 has a threaded hole. The screw is passed through the through hole and threaded to the insert 15, so that the insert 15 can be detachably fixed to the positioning plate 6. After the casting is completed, the insert 15 is embedded in the wiring assembly 1. The screw is rotated to separate the screw from the insert 15. The threaded hole of the insert 15 can be used to assist in the positioning of the gradient coil 7 when the wiring assembly 1 is connected to the gradient coil 7.

[0103] like Figure 8 As shown, in one embodiment, the first positioning component 3 is configured to be fitted onto the conductor 11 and abut against the inner wall of the cavity 2a.

[0104] By fitting the first positioning component 3 onto the conductor 11, the first positioning component 3 is connected to the conductor 11. The first positioning component 3 abuts against the inner wall of the cavity 2a, and the inner wall of the cavity 2a restricts the first positioning component 3 and the conductor 11 from moving along the positioning channel 2b, thus limiting the axial movement of the conductor 11. Moreover, after the first positioning component 3 abuts against the inner wall of the cavity 2a, it can block the connection between the cavity 2a and the positioning channel 2b, preventing insulating fluid from flowing out of the cavity 2a through the connection between the cavity 2a and the positioning channel 2b.

[0105] Understandably, the first positioning component 3 can be integrally formed with the conductor 11, or it can be connected to the conductor 11 by means of bonding, welding, threaded connection, etc.; the second positioning component 4 can be detachably connected to the mold body 2 by screws, etc., or it can be connected only to the conductor 11.

[0106] Understandably, the first positioning component 3 can be a ring, a sleeve, a block fitted onto the conductor 11, etc.

[0107] In one embodiment, the mold further includes a sealing ring 5, which is configured to cover the conductor 11 and is disposed between the first positioning component 3 and the inner wall of the cavity 2a. The sealing ring 5 is used to block the connection between the cavity 2a and the positioning channel 2b.

[0108] In this embodiment, by setting a sealing ring 5, the gap that may exist between the first positioning component 3 and the cavity 2a can be sealed, preventing insulating fluid from flowing between the first positioning component 3 and the cavity 2a.

[0109] In one embodiment, the bottom inner wall of the third mold body 23 is provided with a plurality of annular cavities 23a. The annular cavities 23a are coaxially arranged with the positioning channel 2b and are connected to both the positioning channel 2b and the cavity 2a. The annular cavities 23a and the positioning channel 2b are arranged in a one-to-one correspondence. The sealing ring 5 is embedded in the annular cavity 23a.

[0110] like Figures 8 to 10As shown, in one embodiment, a notch is provided at one end of the positioning channel 2b where the conductor 11 is inserted. The bottom inner wall of the notch is a second plane 11a. The second positioning component 4 is configured to be detachably connected to each conductor 11. The second positioning component 4 forms a plurality of first planes 4a, each corresponding to a conductor 11. The first planes 4a are configured to fit against the second planes 11a to achieve circumferential positioning of the conductor 11.

[0111] During the process of connecting the conductor 11, the first plane 4a of the second positioning component 4 gradually comes into contact with the second plane 11a of the conductor 11. After coming into contact with the second plane 11a of multiple conductors 11, the second positioning component 4 can restrict each conductor 11 from rotating in the circumferential direction.

[0112] Understandably, the second positioning component 4 and the conductor 11 can be detachably connected by bolts, screws and clips.

[0113] like Figure 8 As shown, in one embodiment, the second positioning component 4 has a second positioning hole 4b passing through the first plane 4a, the conductor 11 has a first positioning hole 11b opposite to the second positioning hole 4b, the inner wall of the first positioning hole 11b has an internal thread, and the size of the second positioning hole 4b is smaller than that of the first positioning hole 11b.

[0114] In this embodiment, when it is necessary to connect the second positioning component 4 and the conductor 11, the screw is passed through the second positioning hole 4b and threaded into the first positioning hole 11b. During the tightening of the screw, the screw can drive the first plane 4a to fit against the second plane 11a of the conductor 11, so that the first plane 4a is tightly attached to the second plane 11a. This achieves a detachable connection between the second positioning component 4 and the conductor 11, while also achieving circumferential positioning of the conductor 11.

[0115] By setting the inner diameter of the second positioning hole 4b to be larger than that of the first positioning hole 11b, the axial position of the conductor 11 is restricted after the screw passes through the second positioning hole 4b, thus avoiding interference between the circumferential positioning and the circumferential positioning of the conductor 11.

[0116] The present invention also provides a method for casting and molding a wiring assembly, using the above-mentioned mold, and the specific process steps are as follows:

[0117] S1, connect the first positioning component 3 to the conductor 11;

[0118] S2, at least two conductors 11 are placed inside the cavity 2a and the conductors 11 are inserted into the positioning channel 2b, and the first positioning component 3 is used to position the conductors 11 axially;

[0119] S3, the second positioning component 4 is connected to the conductor 11, and the second positioning component 4 is used to position the conductor 11 in the circumferential direction;

[0120] S4, inject an insulating fluid into the cavity 2a, at least two conductors 11 are cast together with the insulating fluid, and the cast-in-place wiring assembly 1 is separated from the mold body 2.

[0121] During the process of casting multiple conductors 11 into a single unit, the first positioning component 3 can be integrally formed with the conductors 11, or the conductors 11 can be connected by welding, bonding, screws, etc. The positioning channel 2b is used to guide and position the conductors 11 inserted into the cavity 2a. The second positioning component 4 can position the conductors 11 axially. Multiple conductors 11 can be connected through the second positioning component 4, or the conductors 11 and the mold body 2 can be connected through the second positioning component 4 to position the multiple conductors 11 circumferentially. The positioning channel 2b, the first positioning component 3, and the second positioning component 4 are used to position the conductors 11. Part 4 restricts the six degrees of freedom of movement of conductor 11, realizing the complete positioning of multiple conductors 11 relative to mold body 2. Then, an insulating fluid is injected into mold body 2. After the insulating fluid solidifies, it solidifies multiple conductors 11 into one piece. Then, the integrally cast wiring assembly 1 is separated from mold body 2 to obtain wiring assembly 1. The insulating fluid can be insulating glue, insulating resin, etc. The conductors 11 are completely positioned relative to mold body 2. When the wiring assembly 1 is mass-produced through mold body 2, the axial position and circumferential position of conductor 11 are consistent, which facilitates the mass production of wiring assembly 1.

[0122] In one embodiment, the step of embedding at least two conductors 11 in the cavity 2a and inserting the conductors 11 into the positioning channel 2b includes the following steps:

[0123] S11, connect the first module 21 and the third module 23;

[0124] S12, the sealing ring 5 is fitted onto the conductor 11 and positioned below the limiting ring 32, and then the conductor 11 is inserted into the positioning channel 2b, so that the sealing ring 5 fits against the inner wall of the cavity 2a;

[0125] S13, connect the second module 22 to the first module 21 and the third module 23.

[0126] By first connecting the first mold 21 and the third mold 23, then fitting the sealing ring 5 onto the conductor 11, and then inserting the conductor 11 into the positioning channel 2b, compared to a mold in which the conductor 11 is inserted as a single unit, the present invention can more conveniently insert the conductor 11 into the open first mold 21 and the third mold 23; the first mold 21, the second mold 22, and the third mold 23 are connected to form the mold body 2. When disassembling, the first mold 21, the second mold 22, and the third mold 23 can be separated, and the wiring assembly 1 can be easily removed.

[0127] In one embodiment, before the step of fitting the sealing ring 5 onto the conductor 11 and placing it below the limiting ring 32, the method further includes the step of: S111, fixing the insert 15 to the first fixing position of the third mold body 23 by bolts.

[0128] After the casting is completed, the screws that fix the insert 15 are separated from the insert 15 by fixing the insert 15 in the first fixing position. At this time, the insert 15 and the insulating fluid are solidified into a whole, which can provide a fixing hole for the wiring assembly 1 to connect the gradient coil 7.

[0129] In one embodiment, after the step of fixing the insert 15 to the first fixing position of the third mold 23 by bolts, the step of S112 is further included: fitting the filler 13 onto each conductor 11.

[0130] By setting the filler 13, the filler 13, conductor 11 and insulating fluid are cast into one piece in the cavity 2a, which can increase the structural strength of the wire assembly 1 after molding. Moreover, after the filler 13 is fitted onto each conductor 11, the filler 13 can play a role in positioning and limiting the conductor 11, preventing the conductor 11 from moving during the casting process.

[0131] The filler 13 can have a mounting hole made relative to each conductor 11. The filler 13 is fitted onto each conductor 11 through the mounting hole. The filler 13 is made of insulating material, such as ABS, POM, or epoxy.

[0132] like Figure 1 , 5 As shown in Figures 9 and 11, there are multiple fillers 13. Multiple fillers 13 are sequentially fitted onto conductor 11 along the axial direction of conductor 11. At least one protrusion 14 is formed on one side of the filler 13 relative to the positioning channel 2b. The protrusion 14 is arranged along the axial direction of conductor 11. Adjacent fillers 13 are separated by the protrusion 14.

[0133] By setting the protrusion 14, the protrusion 14 can support the filler 13, so that the filler 13 is located above the bottom surface of the positioning channel 2b. A gap for accommodating insulating fluid is formed between the filler 13 and the bottom surface of the positioning channel 2b. While multiple fillers 13 cover most of the conductor 11, the protrusion 14 can ensure that there is an appropriate spacing between adjacent fillers 13.

[0134] Understandably, the number of filler 13 can be one, two, three, four, five, etc., and the number of filler 13 can be set according to the size of cavity 2a. The number of protrusions 14 formed on filler 13 can be one, two, three, four, etc.

[0135] In one embodiment, there are four fillers 13, which abut against each other sequentially along the axial direction of the conductor. There are two protrusions 14 formed on the fillers 13, which are parallel to each other and spaced apart.

[0136] By providing multiple protrusions 14, the fillers 13 can be spaced apart, allowing insulating fluid to enter between the fillers 13, and the protrusions 14 can also provide support for adjacent fillers 13.

[0137] In one embodiment, after the step of fitting the filler 13 onto each conductor 11, the step S113 is further included: passing the cooling conduit 12 through the filler 13 and causing the cooling conduit 12 to conform to the conductor 11.

[0138] During operation, a large current flows through the conductor 11, causing it to heat up. In this embodiment, a cooling pipe 12 is provided to fit the conductor 11. The two ends of the cooling pipe 12 are connected to the cooling system of the gradient coil 7 via quick-connect connectors. Circulating coolant is introduced into the cooling pipe 12, and the coolant exchanges heat with the conductor 11 through the cooling pipe 12, thus cooling the conductor 11. The number of cooling pipes 12 fitted to the conductor 11 is selected based on the calculated heat generation of the conductor 11.

[0139] like Figure 5 and Figure 11 As shown, the filler 13 also has a fixing groove 13a for the cooling pipe 12 to pass through. The fixing groove 13a is connected to the mounting hole, and the cooling pipe 12 passes through the filler 13 via the fixing groove 13a.

[0140] The fixing groove 13a restricts the installation position of the cooling pipe 12 and can fix and position the cooling pipe 12.

[0141] like Figure 5As shown, the fixing groove 13a passes through both ends of the filler 13 along the axial direction of the mounting hole and through one side of the filler 13 along the radial direction of the mounting hole, so that the cooling pipe 12 can be inserted into the fixing groove 13a from the side opening of the filler 13.

[0142] In one embodiment, after the step of connecting the second positioning component 4 to the conductor 11, the method further includes the step of: S31, fixing the insert 15 to the second fixing position of the positioning plate 6 by bolts, and connecting the positioning plate 6 to the first mold 21.

[0143] Since the positioning plate 6 is located on the opening side of the mold body 2, the insert 15 on the positioning plate 6 can be installed on the positioning plate 6 before the insulating fluid is filled, and no other parts need to be installed subsequently. At this time, installing the insert 15 can avoid the insert 15 interfering with the installation of other parts.

[0144] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A mold configured to cast at least two conductors (11) of a wiring assembly (1) into a single unit, characterized in that, The mold includes: The mold body (2) has a cavity (2a) and at least two positioning channels (2b) connected to the cavity (2a) and used for inserting the conductor (11) into the cavity (2a). A first positioning component (3) is connected to the mold body (2) or configured to connect the conductor (11), the first positioning component (3) being used for axial positioning of the conductor (11); and The second positioning component (4) is configured to connect the conductor (11) and to position the conductor (11) circumferentially; The positioning channel (2b) passes through one side of the mold body (2), and the other side of the mold body (2) has an opening that communicates with the cavity (2a), so that the conductor (11) can extend outward from the mold body (2) through the positioning channel (2b) and the opening; the first positioning component (3) is configured to be sleeved on the conductor (11) and abut against the inner wall of the cavity (2a); A filler (13) is provided in the cavity (2a). The filler (13), conductor (11) and insulating fluid are cast into one piece in the cavity (2a). At least one protrusion (14) is formed on one side of the filler (13) opposite to the positioning channel (2b). The protrusion (14) is arranged along the axial direction of the conductor (11). Adjacent fillers (13) are separated by the protrusion (14).

2. The mold according to claim 1, characterized in that, It also includes a sealing ring (5), which is configured to cover the conductor (11) and is located between the first positioning component (3) and the inner wall of the cavity (2a). The sealing ring (5) is used to block the communication between the cavity (2a) and the positioning channel (2b).

3. The mold according to claim 1, characterized in that, The width of the cavity (2a) at one end relative to the conductor (11) is greater than the width of the cavity (2a) at the other end relative to the conductor (11).

4. The mold according to claim 1, characterized in that, The mold body (2) includes a first mold body (21), a second mold body (22) and a third mold body (23). The first mold body (21) and the second mold body (22) are detachably connected and together form a cavity with openings at both ends. The third mold body (23) is disposed at one end of the cavity and is detachably connected to the first mold body (21) and the second mold body (22). The third mold body (23), the first mold body (21) and the second mold body (22) together form the cavity (2a). The third mold body (23) has a positioning channel (2b) that communicates with the cavity (2a).

5. The mold according to claim 4, characterized in that, A first mounting cavity (24) is formed at the connection between the first mold body (21) and the second mold body (22). A second mounting cavity (25) is formed at the connection between the third mold body (23) and the first mold body (21) and the second mold body (22). The second mounting cavity (25) is arranged around the ends of the first mold body (21) and the second mold body (22). The mold body (2) also includes a first sealing strip (26) and a second sealing strip (27). The first sealing strip (26) is embedded in the first mounting cavity (24) for sealing connection between the first mold body (21) and the second mold body (22). The second sealing strip (27) is embedded in the second mounting cavity (25) for sealing connection between the third mold body (23) and the first mold body (21) and the second mold body (22).

6. The mold according to claim 4, characterized in that, The third mold (23) has a plurality of first fixing positions, which are used to detachably fix the insert (15) into the cavity (2a).

7. A method for casting a wiring assembly, characterized in that, Using the mold according to any one of claims 1 to 6, the specific process steps are as follows: Connect the first positioning component (3) to the conductor (11); At least two of the conductors (11) are placed in the cavity (2a) and the conductors (11) are inserted into the positioning channel (2b), wherein the first positioning component (3) is used to position the conductors (11) axially; The second positioning component (4) is connected to the conductor (11), and the second positioning component (4) is used to position the conductor (11) circumferentially; An insulating fluid is injected into the cavity (2a), at least two of the conductors (11) are cast together with the insulating fluid, and the cast wiring assembly (1) is separated from the mold body (2).

8. The method for casting and molding the wiring assembly according to claim 7, characterized in that, Prior to the step of injecting an insulating fluid into the cavity (2a), the method further includes the step of: The filler (13) is fitted onto each of the conductors (11); The cooling conduit (12) is passed through the filler (13) and the cooling conduit (12) is made to fit against the conductor (11).

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