CN115132429A - Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof - Google Patents

Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof Download PDF

Info

Publication number
CN115132429A
CN115132429A CN202210819785.XA CN202210819785A CN115132429A CN 115132429 A CN115132429 A CN 115132429A CN 202210819785 A CN202210819785 A CN 202210819785A CN 115132429 A CN115132429 A CN 115132429A
Authority
CN
China
Prior art keywords
mold core
conductor
cone angle
machine head
arc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210819785.XA
Other languages
Chinese (zh)
Inventor
吴丹
甄志超
成天舒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Tongguang Electronic Wire & Cable Corp ltd
Original Assignee
Jiangsu Tongguang Electronic Wire & Cable Corp ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Tongguang Electronic Wire & Cable Corp ltd filed Critical Jiangsu Tongguang Electronic Wire & Cable Corp ltd
Priority to CN202210819785.XA priority Critical patent/CN115132429A/en
Publication of CN115132429A publication Critical patent/CN115132429A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/143—Insulating conductors or cables by extrusion with a special opening of the extrusion head
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/148—Selection of the insulating material therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a machine head for manufacturing a soft polytetrafluoroethylene insulated wire and a processing method thereof, and the machine head comprises a connector positioned in the machine head, wherein the top of the connector is provided with a mold core through a mold core base, a mold sleeve is arranged outside the mold core, the center of the bottom of the connector is provided with a central tube, the machine head comprises two sections of cones with different angles, namely a bottom cone angle and a top cone angle, the angles of the top cone angle are smaller than the bottom cone angle, a machine head bearing line section is horizontal to the mold core base, the connector comprises two trapezoidal cones with different angles, the bottom cone angle and a top cone angle are the same, the top cone angle is smaller than the top cone angle, the bottom of the central tube is provided with a conductor anti-shaking device, the conductor anti-shaking device comprises arc grooved wheels and springs, and the arc grooved wheels are connected through a central rod. The method comprises the following steps: a filler; installing a central pipe and relevant parts of a mold core; installing a machine head and a die sleeve; and (6) pushing. Can make the outside insulating layer of conductor compact more to avoid the conductor to take place the phenomenon of buckling when processing.

Description

Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof
Technical Field
The invention relates to the technical field of electric wire production, in particular to a machine head for manufacturing a soft polytetrafluoroethylene insulated electric wire and a processing mode thereof.
Background
The polytetrafluoroethylene extrusion insulated wire and cable is a cable with the advantages of excellent high temperature resistance, excellent chemical resistance, moisture resistance, no combustion and the like, and meets the three-prevention requirements of salt spray, mould and moisture resistance. The product can meet the requirements of information and energy transmission in severe environments in the fields of aerospace, aviation, shipboard, electronics, war chariot and the like, is mainly used for internal connection lines of electrical equipment, instrument and meter lines and other electrical devices below 600V, aircraft wiring and the like, and is particularly suitable for ground test system wiring. The conventional extruded polytetrafluoroethylene insulated wire and cable adopts a regular stranded conductor structure (such as 19/0.10 and the like), the conductor is tightly stranded, and the flexibility of the wire is poor due to the limitation of the structure, so that the installation of the wire is limited, and particularly, the wire with a larger size is obvious. A bundle conductor (such as 30/0.08) is adopted in a conventional lapped polytetrafluoroethylene insulated wire, the conductor is loosely stranded, although the conductor is soft, the surface of the conductor is uneven due to the lapped lapping cover on the surface, the wear resistance and the moisture resistance are relatively poor, and the use is limited.
Extrude insulating electric wire for regular stranded conductor, bundle conductor polytetrafluoroethylene extrudes the compliance that can promote the electric wire, reduces the bending radius of electric wire, more is favorable to the electric wire to be laid. On the other hand, compared with the conventional polytetrafluoroethylene lapped and insulated wire, the extruded insulation can improve the smoothness of the insulation surface and improve the wear resistance and moisture resistance of the product. However, the bundled conductor is easy to deform and arch under stress due to the loose structure of the conductor, and the polytetrafluoroethylene pushing insulation processing cannot be finished under the prior art.
The document CN111180141A discloses a preforming and extruding integrated machine and a processing method thereof, which is also a method for forming an electric wire, but in this structure, the insulating material extruded by the machine head is straight, so that the conductor structure is easily loosened when the insulating material is extruded, and is easily deformed and arched by force, which is not beneficial to later use and reduces the service life of the conductor.
Disclosure of Invention
In order to solve the problems, the invention discloses a machine head for manufacturing a flexible polytetrafluoroethylene insulated wire and a processing method thereof, which can enable an insulating layer outside a conductor to be more compact and avoid the phenomenon that the conductor is bent during processing.
The technical scheme of the invention is as follows: the utility model provides a soft aircraft nose for insulated wire manufacturing of polytetrafluoroethylene, including the connector that is located the aircraft nose, the connector top is equipped with the mold core through the mold core base, the mold core outside is equipped with the die sleeve, connector bottom center is equipped with the center tube, the aircraft nose includes the different cone of two sections angles, for bottom cone angle and top cone angle, the angle at top cone angle is less than the bottom cone angle, aircraft nose holding section and mold core base level, the connector includes the trapezoidal circular cone that two angles are different, bottom cone angle and tip angle, bottom cone angle and bottom cone angle are the same, the tip angle is less than the top cone angle, the center tube bottom is equipped with the conductor and prevents shaking the device, the conductor prevents shaking the device and includes arc sheave and spring, connect through well core rod between the arc sheave, well core rod and center tube lateral wall are connected.
Furthermore, the arc-shaped groove on the arc-shaped grooved wheel is V-shaped, namely the upper part is wide and the lower part is narrow, the arc-shaped grooved wheel comprises an upper arc-shaped grooved wheel and a lower arc-shaped grooved wheel, the circle centers of the upper arc-shaped grooved wheel and the lower arc-shaped grooved wheel are connected with the lateral wall of the central pipe through the transverse direction of the spring, the circle centers between the arc-shaped grooved wheels are connected with the two ends of the central rod through a bearing, and the middle part of the central rod is connected with the lateral wall of the central pipe through a fixed rod.
Furthermore, the upper arc grooved wheel is positioned on one side above the lower arc grooved wheel, one side, opposite to the upper arc grooved wheel, of the lower arc grooved wheel is on the same vertical line, a Z shape is formed among the upper arc grooved wheel, the lower arc grooved wheel and the spring, a conductor passes through the upper arc grooved wheel and the lower arc grooved wheel, the conductor just passes through a connection point of the central rod and the fixed rod, the spring is in a natural state when no conductor passes through the spring, and the spring is in a tensioning state when the conductor passes through the spring and is influenced by the conductor.
Further, a die sleeve is arranged in a die sleeve groove at the top of the machine head and between the die cores, a line bearing section is arranged between the bottom of the die sleeve groove and the inner conical structure of the machine head, the line bearing section is a cylindrical hole, the length of the line bearing section is the same as that of the die core base and ranges from 10mm to 40mm, die sleeve locking covers are arranged at the top of the machine head and the die sleeve, a material barrel is connected to the bottom of the machine head through a machine head clamp, the inner diameter of the material barrel ranges from 90mm to 110mm, and a piston is arranged in the material barrel.
Furthermore, the cone angle of the bottom of the machine head is 35-45 degrees, the cone angle of the top is 5-15 degrees, the cone angle of the top of the connecting head is smaller than the cone angle of the top of the machine head by 3-7 degrees, the internal thread of the bottom of the connecting head is connected with the external thread of the top of the central tube, the external diameter of the central tube is 50-70 mm, and the central tube is of a hollow structure.
Furtherly, the mold core base is detachable two semicylindrical bodies of equalling divide perpendicularly, connects through the locating pin each other, and mold core base both ends all have the screw thread, and bottom external screw thread and connector top female connection, top external screw thread are connected with the mold core, and mold core base external diameter is the same with connector top external diameter, and mold core base bottom round hole passes through the arc with the top round hole and links to each other, and the distance between mold core base and the aircraft nose inner wall is 3mm ~ 7 mm.
Furthermore, the mold core is formed by splicing two halves, a through groove is formed in the mold core, namely the through groove of the mold core is formed by two halves of grooves, the mold core is overall conical, internal threads are formed in the bottom of the mold core and are used for being connected with the mold core base, the outer diameter of the bottom of the mold core is the same as the outer diameter of the mold core base, the outer diameter of the top of the mold core is matched with the outer diameter of the conductor and is 0.1-0.2 mm larger than the outer diameter of the conductor, and the taper angle of the mold core is 1-3 degrees smaller than the taper angle in the mold core.
Furthermore, the bottom of the die sleeve is conical, the cone angle is 15-20 degrees, the top of the die sleeve is cylindrical, namely the sizing section, the aperture of the sizing section is matched with the outer diameter of the conductor, the length of the sizing section is 5-15 mm, the distance between the bottom of the sizing section and the top of the die core is 1-3 mm, namely the gap between the inner die sleeve and the outer diameter of the extruded part of the conductor is matched, and the aperture of the top of the die sleeve is smaller than the extruded outer diameter of the conductor by 0.03-0.1 mm.
Further, the horizontal direction of the machine head clamp is a circular ring consisting of three circular arc sections, each circular arc section is connected through a movable buckle, the vertical section of each circular arc is of a C-shaped structure, and the internal dimension of the vertical section of each circular arc is matched with the external dimensions of the bottom of the machine head and the top of the charging barrel.
The processing mode of the machine head for manufacturing the soft polytetrafluoroethylene insulated wire comprises the following steps:
step 1: filling: the piston is withdrawn to the bottom of the charging barrel, and the insulating material is placed into the charging barrel;
step 2: installation of the central tube and relevant parts of the mold core: the conductor penetrates through the bottom of a central tube and penetrates through the middle of a conductor anti-shaking device, namely the conductor penetrates through the middle of an upper arc-shaped grooved wheel and a lower arc-shaped grooved wheel and penetrates out of the top of the central tube, the conductor penetrates through a connector after penetrating out, then the connector is screwed on the central tube, then the conductor is placed in a groove of one half of a mold core base, then the other half of the mold core base is closed, the mold core base is screwed on the connector after the conductor can move in the mold core base, finally the mold core is screwed on the mold core base after penetrating through the mold core, and the position of the mold core is adjusted until the gap between the inner mold core and the mold core reaches a required value by moving the central tube up and down;
and step 3: installing a machine head and a die sleeve: after the conductor passes through the center of the handpiece, the handpiece and the charging barrel are correspondingly placed, then the handpiece clamp is used for locking the handpiece and the charging barrel, the conductor passes through the die sleeve, the die sleeve is placed in a die sleeve groove on the handpiece, and the die sleeve is locked by a die sleeve locking cover;
and 4, step 4: pushing: the piston extrudes the insulation material from the die sleeve hole through mechanical thrust or hydraulic thrust, so that the insulation material is extruded on the conductor.
The invention has the advantages that: 1. the machine head comprises two sections of cones with different angles, under the condition that the thrust is unchanged, the larger the angle of the machine head is, the larger the component force in the direction vertical to the conductor is, and the larger the component force in the direction vertical to the conductor is due to the larger angle of the large-angle cone angle part, so that the insulating material can be quickly compacted, the integral length of the machine head can be shortened, and the larger the component force in the direction vertical to the conductor is due to the smaller angle of the small-angle cone angle part, so that the pressure on a central pipe and a mold core can be reduced.
2. The machine head bearing wire is horizontal to the mold core base, the thrust direction is horizontal to the conductor at the moment, the thrust component pointing to the conductor in the vertical direction is 0, and only the force generated by the expansion of the insulating material exists in the vertical direction, so that the force in the direction vertical to the conductor is further reduced.
3. According to the invention, the ratio of the ring sectional area between the charging barrel and the central rod to the ring sectional area between the top of the die sleeve and the conductor, namely the compression ratio of the insulating material, is larger, the larger the ratio is, the larger the initial thrust N for pushing the insulating material is, correspondingly, the larger the acting force on the conductor is finally, the easier the conductor is to deform, and the compression ratio is reduced by increasing the outer diameter of the central rod, so that the initial thrust N is reduced; through setting up the line-bearing segment, when holding the line segment, insulating material parallel translation compresses insulating material again after getting into the die sleeve, uses the method of segmentation compression insulating material, further reduces the pressure to the conductor.
4. According to the anti-shaking device for the conductor in the central tube and the arc-shaped structure in the mold core base, the upper arc-shaped grooved wheel, the lower arc-shaped grooved wheel and the central rod enable the passing conductor to avoid the conductor from being deformed and loosened due to conductor shaking, and the pushing and insulating processing of the bundle stranded conductor is realized through the device.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural view of a conductor anti-sloshing apparatus according to the present invention;
FIG. 3 is a schematic view of the head of the present invention under force;
FIG. 4 is an enlarged view of portion A of FIG. 1;
wherein: 0. the conductor, 1, a charging barrel, 2, a machine head, 21, a machine head clamp, 22, a die sleeve groove, 3, a central pipe, 31, a conductor anti-shaking device, 311, an upper arc grooved wheel, 312, a lower arc grooved wheel, 313, a spring, 314, a central rod, 315, a fixing rod, 32, a connector, 4, a die core, 41, a die core base, 42, a wire bearing section, 5, a die sleeve, 51, a die sleeve locking cover, 52, a sizing section, 6 and a piston.
Detailed Description
For the purpose of promoting an understanding of the present invention, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 4, a machine head for manufacturing a flexible polytetrafluoroethylene insulated wire comprises a connector 32 located in a machine head 2, a mold core 4 is arranged at the top of the connector 32 through a mold core base 41, a mold sleeve 5 is arranged outside the mold core 4, a central tube 3 is arranged at the center of the bottom of the connector 32, the machine head 2 comprises two sections of cones with different angles, namely a bottom cone angle and a top cone angle, the angle of the top cone angle is smaller than that of the bottom cone angle, a line bearing section of the machine head 2 is horizontal to the mold core base 41, the connector 32 comprises two trapezoidal cones with different angles, the bottom cone angle and the top cone angle are the same, the top cone angle is smaller than that of the top cone angle, a conductor anti-shaking device 31 is arranged at the bottom of the central tube 3, the conductor anti-shaking device 31 comprises an arc-shaped grooved wheel and a spring 313, the arc-shaped grooved wheels are connected through a central rod 314, and the central rod 314 is connected with the side wall of the central tube 3.
The arc-shaped groove on the arc-shaped grooved wheel is V-shaped, namely the upper part is wide and the lower part is narrow, the arc-shaped grooved wheel comprises an upper arc-shaped grooved wheel 311 and a lower arc-shaped grooved wheel 312, the circle centers of the upper arc-shaped grooved wheel 311 and the lower arc-shaped grooved wheel 312 are transversely connected with the side wall of the central pipe 3 through a spring 313, the circle centers between the arc-shaped grooved wheels are connected with the two ends of a central rod 314 through bearings, and the middle part of the central rod 314 is connected with the side wall of the central pipe 3 through a fixing rod 314.
The upper arc-shaped grooved wheel 311 is positioned on one side above the lower arc-shaped grooved wheel 312, the opposite sides of the upper arc-shaped grooved wheel 311 and the lower arc-shaped grooved wheel 312 are on the same vertical line, a Z shape is formed among the upper arc-shaped grooved wheel 311, the lower arc-shaped grooved wheel 312 and the spring 313, a conductor 0 passes through the upper arc-shaped grooved wheel 311 and the lower arc-shaped grooved wheel 312, the conductor 0 just passes through a connecting point of the central rod 314 and the fixed rod 315, the spring 313 is in a natural state when no conductor 0 passes through the spring 313, and the conductor 0 is influenced by the conductor 0 to be in a tensioning state when the conductor 0 passes through the spring 313.
A die sleeve 5 is arranged between the die sleeve groove 22 at the top of the machine head 2 and the die core 4, a wire bearing section 42 is arranged between the bottom of the die sleeve groove 22 and a conical structure in the machine head 2, the wire bearing section 42 of the machine head 2 is horizontal to the die core base 41, the wire bearing section 42 is a cylindrical hole, and the wire bearing section 42 has a thrust N parallel to the conductor 0 3 The length of the wire bearing section is the same as that of the mold core base 41 and ranges from 10mm to 40mm, the top of the machine head 2 and the top of the mold sleeve 5 are provided with mold sleeve locking covers 51, the bottom of the machine head 2 is connected with a charging barrel 1 through a machine head clamp 21, the inner diameter of the charging barrel 1 ranges from 90mm to 110mm, a piston 6 is arranged in the charging barrel 1, the ratio of the circular cross section area between the charging barrel 1 and a central rod 314 to the circular cross section area between the top of the mold sleeve 5 and a conductor, namely the compression ratio of the insulating material, the larger the ratio is, the larger the initial thrust N for pushing the insulating material is, the larger the ratio is, the larger the corresponding force is, and finally the larger the acting force on the conductor 0 is, and the conductor 0 is easier to deform. By increasing the outer diameter of the center rod 314, reducing the compression ratio,thereby reducing the initial thrust N; by arranging the wire bearing section, when the wire bearing section is used, the insulating material moves in parallel, the insulating material is compressed again after entering the die sleeve 5, and the pressure on the conductor 0 is further reduced by using a method for compressing the insulating material in sections.
The cone angle of the bottom of the machine head 2 is 35-45 degrees, the cone angle of the top is 5-15 degrees, the cone angle of the top of the connector 32 is smaller than the cone angle of the top of the machine head 3-7 degrees, the internal thread of the bottom of the connector 32 is connected with the external thread of the top of the central tube 3, the external diameter of the central tube 3 is 50-70 mm, the central tube 3 is of a hollow structure, the cone angle of the machine head 2 converts the initial thrust parallel to the conductor 0 in the charging barrel 1 into the thrust N parallel to the conductor 0 at the part of the cone angle of the bottom 1Y And a thrust N perpendicular to the conductor 0 1X Converted into a thrust N with the portion of the cone angle at the top part parallel to the conductor 2Y And a thrust N perpendicular to the conductor 2X The thrust parallel to conductor 0 moves the insulation forward and the force perpendicular to conductor 0 compacts the insulation. When the taper angle is smaller, the component force perpendicular to the conductor 0 is smaller, the pressure on the conductor 0 is smaller, but the insulation material is not favorably compacted, so that the electric breakdown occurs, and meanwhile, the length of the machine head 2 is longer; when the cone angle is larger, the component force perpendicular to the conductor 0 is larger, the insulating material can be compacted, but the influence on the conductor 0 is large, the conductor is easy to deform, and the normal production is influenced. The large-angle cone angle part of the turning angle machine head 2 has a large angle, so that the converted component force in the direction vertical to the conductor is large, the insulation material can be quickly compacted, the whole length of the machine head 2 is shortened, the small-angle cone angle part has a small angle, so that the converted component force in the direction vertical to the conductor 0 is small, the final pressure on the conductor 0 can be reduced, and the schematic diagram of the internal force of the machine head 2 is shown in figure 3.
Mold core base 41 is detachable two semicylinders of equalling divide perpendicularly, connects through the locating pin each other, and 41 both ends of mold core base all have the screw thread, bottom external screw thread and connector top female connection, and the top external screw thread is connected with the mold core, and 41 external diameters of mold core base are the same with connector 32 top external diameter, and 41 bottom round holes of mold core base pass through the arc with the top round hole and link to each other, and the distance between 41 and the 2 inner walls of aircraft nose of mold core base is 3mm ~ 7 mm.
The mold core 4 is formed by splicing two halves, a through groove is formed in the mold core, namely the through groove of the mold core is formed by two grooves, the mold core 4 is conical in general, internal threads are formed in the bottom of the mold core and are used for being connected with a mold core base 41, the outer diameter of the bottom of the mold core is the same as the outer diameter of the mold core base, the outer diameter of the bottom of the mold core 4 is the same as the outer diameter of the mold core base 41, the outer diameter of the top of the mold core is matched with the outer diameter of a conductor 0 and is 0.1-0.2 mm larger than the outer diameter of the conductor 0, and the taper angle of the mold core 4 is 1-3 degrees smaller than the taper angle of the mold sleeve 5.
The bottom of the die sleeve 5 is conical, the cone angle is 15-20 degrees, and the part of the cone angle has a thrust N parallel to the conductor 4Y And a thrust N perpendicular to the conductor 4X The top is a cylindrical sizing section, the aperture of the sizing section 52 is matched with the outer diameter of the conductor, the length is 5 mm-15 mm, and the sizing section 52 has a thrust N parallel to the conductor 5 The distance between the bottom of the sizing section 52 and the top of the mold core 4 is 1 mm-3 mm, namely the gap between the inner mold sleeve and the outer diameter of the conductor 0, and the aperture of the top of the mold sleeve is matched with the outer diameter of the conductor 0 in extrusion and is smaller than the outer diameter of the conductor 0 in extrusion by 0.03-0.1 mm.
The horizontal direction of the machine head clamp 21 is a circular ring consisting of three circular arc sections, each circular arc section is connected by a movable buckle, the vertical section of each circular arc is of a C-shaped structure, and the internal dimension of the vertical section is matched with the external dimensions of the bottom of the machine head 2 and the top of the charging barrel 1.
The processing mode of the machine head for manufacturing the soft polytetrafluoroethylene insulated wire comprises the following steps:
step 1: filling: the piston 6 is retreated to the bottom of the charging barrel 1, and the insulating material is placed into the charging barrel 1;
step 2: central tube 314 and the parts associated with core 4 are mounted: a conductor 0 penetrates through the bottom of a central tube 3 and penetrates through the middle of a conductor anti-shaking device 31, namely penetrates through the middle of an upper arc grooved wheel 311 and a lower arc grooved wheel 312 and penetrates out of the top of the central tube 3, the conductor 0 penetrates through a connector 32 after penetrating out, then the connector 32 is screwed on the central tube 3, then the conductor 0 is placed in a groove of one half of a mold core base 41, then the other half of the mold core base 41 is closed, the mold core base 41 is screwed on the connector 32 after the conductor 0 can move in the mold core base 41, finally the mold core 4 is screwed on the mold core base 41 after the conductor 0 penetrates through the mold core 4, and the position of the mold core 4 is adjusted until the clearance of the inner mold core reaches a required value by moving the central tube 3 up and down;
and step 3: the machine head 2 and the die sleeve 5 are installed: after the conductor 0 passes through the center of the machine head 2, the machine head 2 and the charging barrel 1 are correspondingly placed, then the machine head 2 and the charging barrel 1 are locked by using a machine head clamp 21, the conductor 0 passes through a die sleeve 5, the die sleeve 5 is placed in a die sleeve groove 22 on the machine head 2, and the die sleeve 5 is locked by using a die sleeve locking cover 51;
and 4, step 4: pushing: the piston 6 extrudes the insulation material from a die case hole (a hole for extruding the insulation material in a die case, which is a conventional structure) by a mechanical thrust or a hydraulic thrust, thereby extruding the insulation material on the conductor 0.

Claims (10)

1. Soft polytetrafluoroethylene is aircraft nose for insulated wire manufacturing, including the connector that is located the aircraft nose, the connector top is equipped with the mold core through the mold core base, the mold core outside is equipped with the die sleeve, connector bottom center is equipped with center tube, its characterized in that: the head comprises two sections of cones with different angles, namely a bottom cone angle and a top cone angle, the angle of the top cone angle is smaller than that of the bottom cone angle, the head wire bearing section is horizontal to the mold core base, the connector comprises two trapezoidal cones with different angles, a bottom cone angle and a top cone angle, the bottom cone angle and the bottom cone angle are the same, the top cone angle is smaller than that of the top cone angle, the bottom of the central tube is provided with a conductor anti-shaking device, the conductor anti-shaking device comprises arc grooved wheels and springs, the arc grooved wheels are connected through a central rod, and the central rod is connected with the side wall of the central tube.
2. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the arc-shaped groove on the arc-shaped grooved wheel is V-shaped, namely the arc-shaped groove is wide at the upper part and narrow at the lower part, the arc-shaped grooved wheel comprises an upper arc-shaped grooved wheel and a lower arc-shaped grooved wheel, the circle centers of the upper arc-shaped grooved wheel and the lower arc-shaped grooved wheel are transversely connected with the side wall of the central pipe through springs, the circle centers between the arc-shaped grooved wheels are connected with the two ends of the central rod through bearings, and the middle part of the central rod is connected with the side wall of the central pipe through a fixed rod.
3. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the upper arc grooved wheel is positioned on one side above the lower arc grooved wheel, one side, opposite to the upper arc grooved wheel, of the lower arc grooved wheel is on the same vertical line, a Z shape is formed among the upper arc grooved wheel, the lower arc grooved wheel and the spring, a conductor passes through the upper arc grooved wheel and the lower arc grooved wheel, the conductor just passes through a connecting point of the central rod and the fixed rod, the spring is in a natural state when no conductor passes through the spring, and the spring is in a tensioning state when the conductor passes through the spring and is influenced by the conductor.
4. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the die sleeve is arranged in the die sleeve groove at the top of the machine head and between the die cores, a line bearing section is arranged between the bottom of the die sleeve groove and the internal conical structure of the machine head and is a cylindrical hole, the length of the line bearing section is the same as that of the die core base and ranges from 10mm to 40mm, the top of the machine head and the top of the die sleeve are provided with die sleeve locking covers, the bottom of the machine head is connected with a material barrel through a machine head clamp, the inner diameter of the material barrel ranges from 90mm to 110mm, and a piston is arranged in the material barrel.
5. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the cone angle of the bottom of the machine head is 35-45 degrees, the cone angle of the top of the machine head is 5-15 degrees, the cone angle of the top of the connector is smaller than the cone angle of the top of the machine head by 3-7 degrees, the internal thread of the bottom of the connector is connected with the external thread of the top of the central tube, the external diameter of the central tube is 50-70 mm, and the central tube is of a hollow structure.
6. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the mold core base is detachable two semicylinders of equalling divide perpendicularly, connects through the locating pin each other, and mold core base both ends all have the screw thread, and bottom external screw thread and connector top internal thread are connected, and top external screw thread is connected with the mold core, mold core base external diameter is the same with connector top external diameter, and mold core base bottom round hole passes through the arc with the top round hole and links to each other, and the distance between mold core base and the aircraft nose inner wall is 3mm ~ 7 mm.
7. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the mold core is formed by splicing two halves, a through groove is formed in the mold core, namely the through groove of the mold core is formed by two halves of grooves, the mold core is conical overall, internal threads are formed in the bottom of the mold core and are used for being connected with a mold core base, the outer diameter of the bottom of the mold core is the same as the outer diameter of the mold core base, the outer diameter of the top of the mold core is matched with the outer diameter of a conductor and is 0.1-0.2 mm larger than the outer diameter of the conductor, and the cone angle of the mold core is 1-3 degrees smaller than the cone angle in the mold core.
8. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: inside the die sleeve, the bottom is conical, the cone angle is 15 ~ 20 degrees, and the top is cylindrical promptly the sizing section, and sizing section aperture matches with the conductor external diameter, and length is 5mm ~ 15mm, and sizing section bottom and mold core top distance, promptly the internal mold cover clearance is 1mm ~ 3mm, and die sleeve top aperture and conductor extrude the external diameter and match, are less than the conductor and extrude external diameter 0.03 ~ 0.1 mm.
9. The handpiece for manufacturing a flexible polytetrafluoroethylene insulated wire according to claim 1, characterized in that: the horizontal direction of the machine head fixture is a circular ring consisting of three circular arc sections, each circular arc section is connected by a slipknot, each circular arc vertical section is of a C-shaped structure, and the inner size of each circular arc vertical section is matched with the outer sizes of the bottom of the machine head and the top of the charging barrel.
10. A method of manufacturing a head for use in manufacturing a flexible ptfe insulated wire as defined in any one of claims 1 to 9, comprising the steps of:
step 1: filling: the piston is withdrawn to the bottom of the charging barrel, and the insulating material is placed into the charging barrel;
step 2: installation of the central tube and relevant parts of the mold core: a conductor penetrates through the bottom of a central tube and penetrates through the middle of a conductor anti-shaking device, namely the conductor penetrates through the middle of an upper arc grooved wheel and a lower arc grooved wheel and penetrates out of the top of the central tube, the conductor penetrates through a connector after penetrating out, then the connector is screwed on the central tube, then the conductor is placed in a groove of one half of a mold core base, then the other half of the mold core base is closed, the mold core base is screwed on the connector after the conductor can move in the mold core base, finally the mold core is screwed on the mold core base after penetrating through the mold core, and the position of the mold core is adjusted until the clearance of an inner mold sleeve reaches a required value by moving the central tube up and down;
and step 3: installing a machine head and a die sleeve: after the conductor passes through the center of the handpiece, the handpiece and the charging barrel are correspondingly placed, then the handpiece clamp is used for locking the handpiece and the charging barrel, the conductor passes through the die sleeve, the die sleeve is placed in a die sleeve groove on the handpiece, and the die sleeve is locked by a die sleeve locking cover;
and 4, step 4: pushing: the piston extrudes the insulation material from the die sleeve hole through mechanical thrust or hydraulic thrust, so that the insulation material is extruded on the conductor.
CN202210819785.XA 2022-07-13 2022-07-13 Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof Pending CN115132429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210819785.XA CN115132429A (en) 2022-07-13 2022-07-13 Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210819785.XA CN115132429A (en) 2022-07-13 2022-07-13 Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof

Publications (1)

Publication Number Publication Date
CN115132429A true CN115132429A (en) 2022-09-30

Family

ID=83383300

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210819785.XA Pending CN115132429A (en) 2022-07-13 2022-07-13 Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof

Country Status (1)

Country Link
CN (1) CN115132429A (en)

Similar Documents

Publication Publication Date Title
EP2202760B1 (en) Coaxial cable and multicore coaxial cable
US11605480B2 (en) Electrical cable with dielectric foam
CN104538107A (en) Equipment and process for manufacturing power transmission conductor with carbon fiber core
CN105144485B (en) Controlled compression pipe
CN102780097A (en) Shielded cable
CN115132429A (en) Machine head for manufacturing soft polytetrafluoroethylene insulated wire and processing mode thereof
CN201266501Y (en) Expanded conductor
CN218159809U (en) Machine head for manufacturing soft polytetrafluoroethylene insulated wire
CN214279691U (en) Concentricity automatic regulating mechanism of cable insulation extrusion equipment
CN204481154U (en) A kind of coaxial radio frequency cable adapter
CN104409181A (en) Processing process of lotus-root-core-shaped polytetrafluoroethylene insulation layer for radio frequency cable
CN101093738B (en) Method for manufacturing semirigid mould for coaxial cable, and the mould
CN103738203B (en) The method of harmless compression joint type dropper and harmless crimping
CN204480763U (en) With transmission pressure and the making apparatus thereof of carbon fiber core
CN202513519U (en) Carbon fiber photoelectric composite wire connecting hardware
CN113539555B (en) High-voltage composite umbilical cable and manufacturing process thereof
CN1235235C (en) Capacity uniform voltage type stick shape suspending composite insulator
CN104733877B (en) A kind of coaxial radio frequency cable adapter
CN207691402U (en) A kind of cable head harness tapered sleeve
CN217573989U (en) Cable sheath extrusion die
CN207149305U (en) A kind of cold-resistant medium-pressure power cable
CN218548935U (en) Bolt type cable connector
CN218416708U (en) Heat tracing cable connecting piece for remote oil production
CN218462914U (en) Middle and low voltage cable extrusion molding mould
CN113936845B (en) Special-shaped high-strength instrument cable and manufacturing process thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination