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CN-121983392-A - Production process and pretreatment equipment for low-loss millimeter wave test cable

CN121983392ACN 121983392 ACN121983392 ACN 121983392ACN-121983392-A

Abstract

The application relates to the field of cable production technology, in particular to low-loss millimeter wave test cable production technology and pretreatment equipment, which aims to solve the problems of unstable dielectric constant and large high-frequency signal loss caused by interlayer gaps; the method comprises the steps of winding a PTFE insulating layer, heat setting, layering and winding a pretreated silver-plated copper conductor by adopting a PTFE film, feeding the silver-plated copper conductor into a heat setting furnace for high-temperature heat setting after winding, winding a silver-plated copper flat belt outside the PTFE insulating layer, and sequentially winding and laminating an aluminum foil and the PTFE film outside the silver-plated copper flat belt to form a stable layer, and preparing a braided shielding layer. The application has the dual advantages of realizing high-frequency low loss and high structural stability, and solves the problems of high-frequency signal loss and poor structural stability of the conventional millimeter wave test cable.

Inventors

  • HE XIAOYUN
  • CAO GANG
  • QIAN ZHEN

Assignees

  • 苏州莱尔微波技术有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (7)

  1. 1. A production process of a low-loss millimeter wave test cable is characterized by comprising the following steps: firstly, conductor pretreatment, namely selecting a silver-plated copper conductor, cleaning the conductor through pretreatment equipment and drying the conductor; step two, wrapping and heat setting the PTFE insulating layer, namely layering and wrapping the pretreated silver-plated copper conductor by adopting a PTFE film, and sending the wrapped conductor into a heat setting furnace for high-temperature heat setting; Thirdly, wrapping the PTFE insulating layer by adopting a silver-plated copper flat belt; Step four, wrapping the silver-plated copper flat belt with a composite aluminum foil and a PTFE film in sequence to form a stable layer; fifthly, preparing a braided shielding layer, carrying out doubling treatment on a plurality of silver-plated copper wires, and braiding a shielding layer outside a stabilizing layer; and sixthly, extruding and gradient cooling the FEP sheath, wherein an FEP raw material is extruded and coated outside the braided shielding layer by a single screw extruder, and after extrusion, the cable is sent into a hot water tank for precooling and then is transferred into a cold water tank for cooling to room temperature.
  2. 2. The pretreatment equipment for producing the low-loss millimeter wave test cable is used for the production process of the low-loss millimeter wave test cable as claimed in claim 1, and is characterized by comprising the following steps: The silver-plated copper conductor winding device comprises a rack (1), wherein positioning frames (2) are fixedly connected to two ends of the rack (1), lead assemblies (3) are assembled at the top ends of each positioning frame (2), one lead assembly (3) is used for discharging a silver-plated copper conductor to be cleaned and dried, and the other lead assembly (3) is used for winding the cleaned and dried silver-plated copper conductor; the ultrasonic cleaner (4) is embedded at the top end of the frame (1), and a wire assembly (5) is arranged at the top end of the frame (1); The drying assembly (6) is assembled at one end, far away from the ultrasonic cleaner (4), of the top of the frame (1), and the wire assembly (5) is used for transmitting silver-plated copper conductors among the lead assembly (3), the ultrasonic cleaner (4) and the drying assembly (6); The silver plating device comprises two supporting plates (7), wherein the two supporting plates (7) are respectively and fixedly connected to two ends of a frame (1), a wire supply assembly (8) is assembled between the two supporting plates (7), and the wire supply assembly (8) is used for being matched with a lead assembly (3) to form the primary erection of a silver plating copper conductor to be treated.
  3. 3. The pretreatment equipment for producing a low-loss millimeter wave test cable according to claim 2, wherein said lead assembly (3) comprises: the carrying shaft lever (9), the carrying shaft lever (9) is rotationally connected to the top end of the positioning frame (2), the top of the positioning frame (2) is fixedly connected with the transmission motor (10), and the output end of the transmission motor (10) is fixedly connected with the carrying shaft lever (9); the wire coil (11), the outside at carrying axostylus axostyle (9) is established to wire coil (11) cover, the one end fixedly connected with threaded rod (12) that carrying axostylus axostyle (9) kept away from driving motor (10), the outside threaded connection of threaded rod (12) has fender dish (13).
  4. 4. The pretreatment equipment for producing a low-loss millimeter wave test cable according to claim 2, wherein said wire assembly (5) comprises: The support seats (14) are fixedly connected to the top end of the frame (1), and the top end of each support seat (14) is rotatably connected with a support roller A (15); The limiting frame (16), the top of frame (1) is fixedly connected with limiting frame (16), vertical sliding connection in top of limiting frame (16) has gag lever post (17), the bottom fixedly connected with regulating plate (18) of gag lever post (17), guide channel (19) have been seted up at the middle part of regulating plate (18); guide board (20), guide board (20) fixed connection is in the bottom of regulating plate (18), the bottom fixedly connected with of guide board (20) bears frame (21), one side rotation of bearing frame (21) is connected with a plurality of backing rolls B (22).
  5. 5. The pretreatment equipment for producing a low-loss millimeter wave test cable according to claim 4, wherein said drying assembly (6) comprises: The drying box (23), the drying box (23) is fixedly connected to one end of the top of the frame (1) far away from the ultrasonic cleaner (4), a shunt tube (24) is fixedly connected to the top inside the drying box (23), and a plurality of drying branch pipes (25) are fixedly connected to two sides of the shunt tube (24); The air supply fan (26), air supply fan (26) fixed connection is on the top of stoving case (23), the output fixedly connected with transmission tube (27) of air supply fan (26), the top fixedly connected with intensification case (28) of stoving case (23), the one end that air supply fan (26) was kept away from to transmission tube (27) still communicates with intensification case (28); The electric heating wire (29), the electric heating wire (29) is fixedly connected in the heating box (28), an air supply pipe (30) is fixedly connected to the top end of one side of the heating box (28), and one end, far away from the heating box (28), of the air supply pipe (30) is also communicated with the shunt pipe (24); The two plugging doors (31) are vertically and slidably connected to two ends of the drying box (23) respectively, an avoidance groove (32) is formed in the middle of each plugging door (31), and a heat insulation curtain (33) is fixedly connected to the avoidance groove (32); The transmission frame (34), the top at stoving case (23) is connected firmly to transmission frame (34), the top fixedly connected with pneumatic cylinder (35) of transmission frame (34), the output fixedly connected with displacement board (36) of pneumatic cylinder (35), and the both ends of displacement board (36) are connected firmly with two shutoff doors (31) respectively; the transmission assembly is assembled between one of the plugging doors (31) and the adjusting plate (18), and is used for being matched with the adjusting plate (18) to change the vertical position of the bearing frame (21).
  6. 6. The pretreatment equipment for producing the low-loss millimeter wave test cable according to claim 5, wherein the transmission assembly comprises: The extension plate (37), extension plate (37) fixedly connected with is on the top of one of them shutoff door (31), the one end fixedly connected with transfer line (38) that shutoff door (31) were kept away from to extension plate (37), the top that frame (1) is close to ultrasonic cleaner (4) one end rotates and is connected with linkage axostylus axostyle (39), the one end fixedly connected with push plate (40) of linkage axostylus axostyle (39), the one end fixedly connected with push rod (41) that linkage axostylus axostyle (39) was kept away from to push plate (40), push rod (41) still swing joint is in the inside of leading logical groove (19); The linkage plate (42), linkage plate (42) fixed connection is near one side of transfer line (38) in linkage axostylus axostyle (39), linkage logical groove (43) have been seted up at the middle part of linkage plate (42), just transfer line (38) still swing joint is in the inside of linkage logical groove (43).
  7. 7. The pretreatment equipment for producing a low-loss millimeter wave test cable according to claim 2, wherein the wire feeding assembly (8) comprises: The two linkage rods (44), the two linkage rods (44) are respectively and rotatably connected to the middle parts of the two supporting plates (7), belt wheels (45) are fixedly connected to the outer sides of the linkage rods (44), a driving motor (46) is fixedly connected to one side of one supporting plate (7), the output end of the driving motor (46) is fixedly connected with one of the linkage rods (44), and a transmission belt (47) is arranged between the two belt wheels (45); The transmission frame (48), transmission frame (48) fixed connection is on drive belt (47), the one end fixedly connected with positioning seat (49) of transmission frame (48), the inboard rotation of positioning seat (49) is connected with pivot (50), screw thread end (51) have all been seted up to top and the bottom in pivot (50) outside, and two screw thread of screw thread end (51) revolves to opposite, two equal screwed connection has locating splint (52) on screw thread end (51).

Description

Production process and pretreatment equipment for low-loss millimeter wave test cable Technical Field The application relates to the field of cable production processes, in particular to a low-loss millimeter wave test cable production process and pretreatment equipment. Background The low-loss millimeter wave test cable is a key component of the radio frequency microwave millimeter wave test system and has the characteristics of high frequency, low loss, stable structure and high dimensional accuracy; However, the insulating layer of the low-loss millimeter wave test cable in the prior art is mostly formed by single wrapping or extrusion, the dielectric constant is unstable easily caused by interlayer gaps, the high-frequency signal loss is large, the structural design of the outer conductor and the shielding layer is simple, the anti-interference capability is weak, the structure is easy to loose after long-term use, meanwhile, the sheath is mostly cooled by a single cooling water tank, the sheath is easily cracked or internal stress is remained due to overlarge temperature difference, the overall stability of the cable is influenced, and the high-precision test requirement is difficult to meet. In addition, in the manufacture of millimeter wave test cables, silver-plated copper conductors need to be pretreated to ensure extremely high bonding forces between the subsequent silver plating and the copper matrix. Because the cable can experience the effects of various mechanical stresses such as wrapping, heat setting, bending and the like in the processing and using processes, if the binding force of the coating is insufficient, the coating can be directly foamed, fall off or have other defects, and the signal transmission performance and stability of the cable are seriously affected. Among them, oil stain, oxide and other impurities on the surface of the copper conductor can prevent the silver layer from directly growing, which is a direct cause of defects such as reduced binding force, rough plating layer or pinhole generation. Disclosure of Invention In order to solve the problem of unstable dielectric constant and high-frequency signal loss caused by interlayer gaps, the application provides a production process and pretreatment equipment of a low-loss millimeter wave test cable. The application provides a production process of a low-loss millimeter wave test cable, which adopts the following technical scheme: a low-loss millimeter wave test cable production process comprises the following steps: firstly, conductor pretreatment, namely selecting a silver-plated copper conductor, cleaning the conductor through pretreatment equipment and drying the conductor; step two, wrapping and heat setting the PTFE insulating layer, namely layering and wrapping the pretreated silver-plated copper conductor by adopting a PTFE film, and sending the wrapped conductor into a heat setting furnace for high-temperature heat setting; Thirdly, wrapping the PTFE insulating layer by adopting a silver-plated copper flat belt; Step four, wrapping the silver-plated copper flat belt with a composite aluminum foil and a PTFE film in sequence to form a stable layer; fifthly, preparing a braided shielding layer, carrying out doubling treatment on a plurality of silver-plated copper wires, and braiding a shielding layer outside a stabilizing layer; and sixthly, extruding and gradient cooling the FEP sheath, wherein an FEP raw material is extruded and coated outside the braided shielding layer by a single screw extruder, and after extrusion, the cable is sent into a hot water tank for precooling and then is transferred into a cold water tank for cooling to room temperature. The application provides a pretreatment device for producing a low-loss millimeter wave test cable, which comprises: The device comprises a rack, wherein positioning frames are fixedly connected to two ends of the rack, lead assemblies are assembled at the top end of each positioning frame, one lead assembly is used for discharging silver-plated copper conductors to be cleaned and dried, and the other lead assembly is used for winding the silver-plated copper conductors after cleaning and drying; The ultrasonic cleaner is embedded at the top end of the rack, and the top end of the rack is provided with a wire assembly; The drying assembly is assembled at one end of the top of the frame far away from the ultrasonic cleaner, and the wire assembly is used for transmitting silver-plated copper conductors among the lead assembly, the ultrasonic cleaner and the drying assembly; the two supporting plates are respectively and fixedly connected to two ends of the frame, a wire supply assembly is assembled between the two supporting plates and used for being matched with the lead assembly to form the primary erection of the silver-plated copper conductor to be treated. Optionally, the lead assembly includes: The carrying shaft rod is rotationally connected to the top end of th