CN214983001U - Integral type extrusion molding mould of central tube type optical cable sheath - Google Patents
Integral type extrusion molding mould of central tube type optical cable sheath Download PDFInfo
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- CN214983001U CN214983001U CN202120680887.9U CN202120680887U CN214983001U CN 214983001 U CN214983001 U CN 214983001U CN 202120680887 U CN202120680887 U CN 202120680887U CN 214983001 U CN214983001 U CN 214983001U
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Abstract
The utility model belongs to the technical field of optical fiber cables, and relates to an integrated extrusion molding die for a central tube type optical cable sheath, which comprises a die core and a die sleeve, wherein an annular boss is additionally arranged outside the die core, an external thread is preprocessed on the annular boss, and an internal thread is processed on the inner wall of the die sleeve to ensure that the die core is in threaded connection with the die sleeve, so that the die core and the die sleeve can be accurately positioned; the die sleeve is connected with the head of the plastic extruding machine, the center positioning is accurate, quick and convenient when the die sleeve is installed, the link of eccentric adjustment of the optical cable sheath is avoided, the waste of sheath materials is reduced, and the roundness and the appearance attractiveness of the optical cable sheath are improved. The steel wire hole is established and is being close to mold core cavity body both sides, and is loudspeaker form opening with the mold core junction, and the steel wire location and the perforation of being convenient for have then shortened the perforation time. The starting preparation time of die assembly and debugging is reduced, and the production efficiency of the optical cable sheath is improved.
Description
Technical Field
The utility model belongs to the technical field of the optical fiber cable, a integral type extrusion molding mould of center tube formula optical cable sheath is related to.
Background
The sheath is one of the main components of the optical cable, and has the function of preventing the cable core from being influenced by external mechanical action and environmental conditions, so that the stability of optical fiber communication signal transmission is ensured. The central tube type optical cable is a common optical cable and is structurally characterized in that a water blocking material and a steel strip armor layer are arranged on the outer side of a sleeve along the circumferential direction, and then two parallel steel wires are placed on two sides of the steel strip armor layer and a polyethylene sheath is extruded at the same time to form the central tube type optical cable. The sheath extrusion molding mould of central tube formula optical cable generally adopts half extrusion formula, and mold core department has two to be slightly greater than the aperture of steel wire external diameter, installs the mould on the extruding machine aircraft nose earlier during production, then passes the aperture with two steel wires, but the steel wire hole is too little, the position sets up unreasonablely and makes the steel wire be difficult for passing to the sheath eccentric adjustment degree of difficulty is big, leads to optical cable production efficiency low, the extravagant great of sheath material.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that above-mentioned prior art exists, the utility model aims to provide an integral type extrusion molding forming die of central tube formula optical cable sheath has solved the eccentric degree of difficulty of adjusting of current sheath and has reached the difficult problem that passes in steel wire hole greatly.
The utility model discloses a realize through following technical scheme:
an integrated extrusion molding die for a central tube type optical cable sheath comprises a die core and a die sleeve, wherein the die core is arranged in the die sleeve;
a mold core cavity is arranged in the mold core, the outer circular surface of the mold core comprises a first conical surface, a step surface, a second conical surface and a positioning surface which are sequentially connected, an annular boss is arranged on the step surface, and an external thread is prefabricated on the outer circular surface of the annular boss;
two symmetrical steel wire holes are formed in the front end of the first conical surface and communicated with the mold core cavity body;
a die sleeve cavity body is arranged in the die sleeve and comprises a cylindrical cavity body and a conical cavity body which are communicated, internal threads are prefabricated on the inner wall of the cylindrical cavity body, and a flow channel is formed by the conical surface of the conical cavity body and the first conical surface of the die core; the internal thread is matched with the external thread;
and the annular boss is provided with an extrusion molding hole communicated with the flow channel.
Further, the extrusion molding hole is a plurality of.
Furthermore, the extrusion molding hole is evenly opened on the annular boss.
Furthermore, the cross section of the mold core cavity is trapezoidal.
Furthermore, a flange connecting boss is prefabricated outside the die sleeve, and the die sleeve is connected with the head of the plastic extruding machine through the flange connecting boss.
Furthermore, a positioning clamping groove is processed in advance on the positioning surface, and the mold core is connected with the head of the plastic extruding machine through the positioning clamping groove.
Furthermore, a diameter bearing pipe is arranged at one end of the mold core inserted into the mold sleeve.
Furthermore, the steel wire holes are positioned on two sides of the diameter bearing pipe and are arranged close to the diameter bearing pipe.
Furthermore, one end of the steel wire hole close to the inner cavity of the mold core is a horn-shaped opening.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses an integral type extrusion molding mould of central tube formula optical cable sheath, including mold core and die sleeve, prefabricate the first conical surface for connecting gradually with the outer disc of mold core, the step face, second conical surface and locating surface, add outside the step face and established annular boss, the external screw thread of preprocessing on annular boss, at die sleeve inner wall processing internal thread, make and adopt threaded connection between mold core and the die sleeve, can fix a position mold core and die sleeve accurately, the die sleeve is connected with the extruding machine aircraft nose again, central location is accurate when having guaranteed die sleeve and mold core installation, it is quick convenient, the link of optical cable sheath eccentric adjustment has been avoided, the waste of restrictive coating material has been reduced, the roundness and the outward appearance aesthetic property of optical cable sheath have been improved. The steel wire hole is established and is being close to mold core cavity body both sides, and is loudspeaker form opening with the mold core junction, and the steel wire location and the perforation of being convenient for have then shortened the perforation time. The starting preparation time of die assembly and debugging is reduced, and the production efficiency of the optical cable sheath is improved.
Furthermore, a plurality of extrusion holes are formed in the annular boss, so that the pressure stability of the plastic melt is improved, and the extrusion roundness and the attractiveness of the optical cable sheath are ensured.
Drawings
FIG. 1 is an assembly view of a mold core and a mold sleeve of the present invention;
FIG. 2 is a schematic cross-sectional view of a mold core;
FIG. 3 is a side view of the mold core;
FIG. 4 is a schematic view of the structure of a die case;
fig. 5 is an enlarged view at the wire hole.
Wherein: 1 is a mold core; 2 is a die sleeve; 3 is a flow passage; 4 is a positioning surface; 5 is an external thread; 6 is a mold core cavity; 7 is a steel wire hole; 8 is a bearing pipe; 9 is an internal thread; 10 is a cavity body of the die sleeve; 11 is a flange connecting boss; 12 is a first conical surface; 13 is an annular boss; 14 is an extrusion molding hole; 15 is a step surface; and 16 is a second tapered surface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in figure 1, the utility model discloses an integral type extrusion molding mould of central tube formula optical cable sheath, including mold core 1 and die sleeve 2, mold core 1 installs in die sleeve 2.
As shown in fig. 2 and 3, a mold core cavity 6 is formed in the mold core 1, the outer circular surface of the mold core 1 comprises a first conical surface 12, a step surface 15, a second conical surface 16 and a positioning surface 4 which are connected in sequence, an annular boss 13 is arranged on the step surface 15, and an external thread 5 is preformed on the outer circular surface of the annular boss 13; two symmetrical steel wire holes 7 are formed in the front end of the first conical surface 12, and the steel wire holes 7 are communicated with the mold core cavity body 6.
As shown in fig. 4, a die sleeve cavity 10 is formed in the die sleeve 2, the die sleeve cavity 10 comprises a cylindrical cavity and a conical cavity which are communicated, an internal thread 9 is prefabricated on the inner wall of the cylindrical cavity, and the conical surface of the conical cavity and the first conical surface 12 of the die core 1 form a flow channel 3; the internal thread 9 is matched with the external thread 5; an extrusion hole 14 communicated with the flow passage 3 is arranged on the annular boss 13.
As shown in fig. 2, the cross-section of the core cavity body 6 is trapezoidal.
The one end that inserts die sleeve 2 at mold core 1 installs the bearing pipe 8, and the bearing pipe 8 terminal surface indents the 2 port end faces of die sleeve, and bearing pipe 8 is installed in the toper cavity, and too big and harm the cable core when can preventing the plastics fuse-element to extrude, has guaranteed the circularity that the optical cable sheath extrudes simultaneously again.
More preferably, the extrusion holes 14 are plural, and the extrusion holes 14 are uniformly formed on the annular boss 13.
The runner 3 is formed by a gap between the outer side of the mold core 1 and the inner side of the mold sleeve 2 after the mold core 1 and the mold sleeve 2 are assembled and fixed, and a plurality of extrusion holes 14 formed in an annular boss 13 of the mold core 1 are used as components of the runner 3, so that the stability and uniformity of the extrusion pressure of the plastic melt are improved.
Preferably, a positioning clamping groove is pre-processed on the positioning surface 4, and the mold core 1 is connected with the head of the plastic extruding machine through the positioning clamping groove.
The utility model relates to a central tube optical cable sheath integral type extrusion molding mould is through connecting external screw thread 5 and internal thread 9 during the assembly to fix mold core 1 and die sleeve 2, prefabricated flange joint boss 11 that has in the outside of die sleeve 2, it is fixed to be connected through flange joint boss 11 between die sleeve 2 and the extruding machine aircraft nose.
Die sleeve 2 passes through screwed connection with the aircraft nose among the traditional mounting method, and mold core 1 is connected with the aircraft nose, needs adjust the center axiality of die sleeve 2 and mold core 1 many times, the utility model discloses an extrusion molding mould when the installation, die sleeve 2 and mold core 1 are installed in advance, but both centers fix a position the accuracy fast, easily fixed connection, have avoided the link of optical cable sheath eccentric adjustment to reduce the waste of sheath material, improved optical cable sheath's rounding degree and outward appearance aesthetic property.
As shown in fig. 5, the steel wire holes 7 are arranged close to two sides of the diameter bearing pipe 8, the steel wire holes 7 and the diameter bearing pipe 8 are arranged along the axial extension of the mold core 1, and one end of the cavity close to the mold core 1 is designed into a horn-shaped opening, so that the steel wire is positioned and perforated conveniently, the steel wire perforation and time are shortened, the operation difficulty is reduced, the start preparation time of mold assembly and debugging is shortened, and the production efficiency of the optical cable sheath is improved.
Compare with the sheath extrusion molding mould of traditional center tube optical cable, the utility model discloses an integral type extrusion molding mould has reduced the preparation time of starting of mould assembly and the perforation debugging of steel wire, has reduced the perforation of steel wire and has adjusted eccentric degree of difficulty with the sheath, and the preparation time of starting shortens to 0.1h by 1h, has improved the production efficiency of optical cable sheath.
Claims (9)
1. An integrated extrusion molding die for a central tube type optical cable sheath is characterized by comprising a die core (1) and a die sleeve (2), wherein the die core (1) is arranged in the die sleeve (2);
a mold core cavity body (6) is arranged in the mold core (1), the outer circular surface of the mold core (1) comprises a first conical surface (12), a step surface (15), a second conical surface (16) and a positioning surface (4) which are sequentially connected, an annular boss (13) is arranged on the step surface (15), and an external thread (5) is prefabricated on the outer circular surface of the annular boss (13);
the front end of the first conical surface (12) is provided with two symmetrical steel wire holes (7), and the steel wire holes (7) are communicated with the mold core cavity body (6);
a die sleeve cavity body (10) is arranged in the die sleeve (2), the die sleeve cavity body (10) comprises a cylindrical cavity body and a conical cavity body which are communicated, internal threads (9) are prefabricated on the inner wall of the cylindrical cavity body, and a flow channel (3) is formed by the conical surface of the conical cavity body and a first conical surface (12) of the die core (1); the internal thread (9) is matched with the external thread (5);
the annular boss (13) is provided with an extrusion hole (14) communicated with the flow passage (3).
2. A one-piece extrusion molding die for a center tube type optical cable sheath according to claim 1, wherein the extrusion hole (14) is plural.
3. A one-piece extrusion molding die for a center tube type optical cable sheath according to claim 2, wherein the extrusion holes (14) are formed uniformly on the annular boss (13).
4. A unitary extrusion molding die for a central tube type cable sheath according to claim 1, wherein the cross section of the core cavity body (6) is trapezoidal.
5. The integral extrusion molding die for the sheath of the central tube type optical cable as claimed in claim 1, wherein a flange coupling boss (11) is preformed on the outside of the die sleeve (2), and the die sleeve (2) is connected to the head of the extruder through the flange coupling boss (11).
6. The integral extrusion molding die for the central tube type optical cable sheath as claimed in claim 1, wherein a positioning clamping groove is pre-processed on the positioning surface (4), and the die core (1) is connected with a head of the extruding machine through the positioning clamping groove.
7. A one-piece extrusion molding die for a central tube type optical cable sheath according to claim 1, wherein a neck-receiving tube (8) is installed at an end of the core (1) inserted into the die case (2).
8. The integral extrusion molding die for the central tube type optical cable sheath according to claim 1, wherein the steel wire holes (7) are located at both sides of the reducer (8) and are opened near the reducer (8).
9. The integral extrusion molding die for the central tube type optical cable sheath as claimed in claim 1, wherein the end of the wire hole (7) close to the inner cavity of the mold core (1) is a trumpet-shaped opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120680887.9U CN214983001U (en) | 2021-04-02 | 2021-04-02 | Integral type extrusion molding mould of central tube type optical cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120680887.9U CN214983001U (en) | 2021-04-02 | 2021-04-02 | Integral type extrusion molding mould of central tube type optical cable sheath |
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| CN214983001U true CN214983001U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120680887.9U Active CN214983001U (en) | 2021-04-02 | 2021-04-02 | Integral type extrusion molding mould of central tube type optical cable sheath |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431489A (en) * | 2022-09-05 | 2022-12-06 | 江苏亨通线缆科技有限公司 | Needle tube type flat photoelectric mixed cable sheath extrusion die |
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2021
- 2021-04-02 CN CN202120680887.9U patent/CN214983001U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431489A (en) * | 2022-09-05 | 2022-12-06 | 江苏亨通线缆科技有限公司 | Needle tube type flat photoelectric mixed cable sheath extrusion die |
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