CN118559994A - Automatic die changing mechanism for optical cable plastic sleeving - Google Patents

Abstract

The invention relates to an automatic die changing mechanism for optical cable plastic sleeving, which comprises the following components: the rotary table comprises at least two die changing arms, each die changing arm is provided with a containing through hole, the containing through holes penetrate through the rotary table along the thickness direction of the rotary table, and the die changing arms are provided with openings communicated with the containing through holes; the die comprises two half dies, wherein the two half dies are arranged in the accommodating through hole after being spliced, the outer walls of the two half dies are spliced to form a columnar structure, the columnar structure is inserted into the accommodating through hole and is in clearance fit with the accommodating through hole, the inner walls of the two half dies are spliced to form a conical hole, and the conical hole is used for an optical fiber to pass through. The invention provides an automatic die changing mechanism for optical cable plastic sleeving, which not only can realize the rapid die change, but also can realize the rapid die penetrating of optical fibers and improve the production efficiency of the optical fiber plastic sleeving process.

Description

Automatic die changing mechanism for optical cable plastic sleeving

Technical Field

The invention relates to the technical field of optical cable preparation, in particular to an automatic die changing mechanism for optical cable plastic sleeving.

Background

In the optical cable preparation process, optical fiber plastic sleeving is one of important processing processes, namely, loose tubes or beam tubes are prepared outside optical fibers to protect the optical fibers, when the optical fibers are sleeved, the optical fibers in an optical fiber disc are required to be introduced into a plastic sleeving machine through fiber releasing equipment, and the plastic sleeving machine extrudes plastic sleeving outside the optical fibers to form the loose tubes or the beam tubes; typically, the loose tube has 6, 12, 24 core optical fibers which are introduced from the fiber optic disc of the fiber optic payout device, and thus the fibers need to be gathered together prior to introduction into the molding machine, and fiber bundling is required.

Most of the existing optical fiber bundling modes are molds with conical holes, optical fibers are led in from the large holes of the conical holes, are combined together in the molds through the conical shapes Kong Julong, and finally are led out from the small holes of the conical holes to achieve the optical fiber bundling effect; the positions of the existing bundling modes are fixed, and the optical fibers need to be manually guided through the tapered holes, for example: in the prior art, a 12-core optical fiber with the diameter of 2.0mm needs to be prepared, a bundling mold with the aperture of 2.0mm with a conical hole is needed, and it is conceivable that the difficulty of penetrating all 12 optical fibers out of the small hole with the diameter of 2.0mm is high, and the optical fiber is a structure which is easy to damage, so that the optical fiber needs to be very durable and needs to use a certain skill in the process of penetrating the mold, and time is wasted.

Moreover, due to different order production tasks, one production line can possibly produce 2.0mm loose tubes for the former order and 2.6mm loose tubes for the latter order, so that different bundling molds also need to be disassembled and replaced, and re-threading is needed after each mold replacement, thereby wasting production time and reducing production efficiency.

Disclosure of Invention

Therefore, the invention aims to solve the technical problems that in the production of the optical fiber plastic coating process, the die needs to be replaced and the production efficiency is low due to the fact that threading is performed again after the die replacement in the prior art, and provides the automatic die replacing mechanism for the optical cable plastic coating, which not only can realize the rapid replacement of the die, but also can realize the rapid die penetration of the optical fiber, and improves the production efficiency of the optical fiber plastic coating process.

In order to solve the technical problems, the invention provides an automatic die changing mechanism for optical cable plastic sleeving, which comprises the following components:

the rotary table comprises at least two die changing arms, each die changing arm is provided with a containing through hole, the containing through holes penetrate through the rotary table along the thickness direction of the rotary table, and the die changing arms are provided with openings communicated with the containing through holes;

the die comprises two half dies, wherein the two half dies are arranged in the accommodating through hole after being spliced, the outer walls of the two half dies are spliced to form a columnar structure, the columnar structure is inserted into the accommodating through hole and is in clearance fit with the accommodating through hole, the inner walls of the two half dies are spliced to form a conical hole, and the conical hole is used for an optical fiber to pass through.

In one embodiment of the invention, protruding steps are arranged at the optical fiber inlet ends of the two half molds, after the two half molds are spliced, the two steps are spliced to form an annular boss, an annular groove is arranged at the periphery of the accommodating through hole, and the annular boss can be inserted into the annular groove.

In one embodiment of the invention, a ring magnet is disposed within the annular recess, the ring magnet holding the mold halves in a suction manner.

In one embodiment of the invention, the rotary table further comprises a plurality of fixing bolts, a plurality of bolt holes are formed in the rotary table around the annular groove, the annular magnet is placed in the annular groove, the fixing bolts are screwed into the bolt holes, and the fixing bolts press and fix the annular magnet.

In one embodiment of the present invention, the method further comprises a first photoelectric detection sensor for detecting the presence or absence of the annular boss.

In one embodiment of the invention, the mold comprises a plurality of molds of different types, and the molds of different types are respectively arranged on different mold changing arms.

In one embodiment of the present invention, the diameter of the receiving through hole on each mold changing arm is the same, and in the plurality of molds of different types, the diameters of columnar structures formed by the outer walls of the mold halves in a spliced manner are the same, and the diameters of tapered holes formed by the inner walls of the mold halves in a spliced manner are different.

In one embodiment of the invention, the mold changing device further comprises a turntable driving source, wherein the turntable driving source is connected with the turntable through a rotating shaft and drives the turntable to rotate, and different mold changing arms are controlled to rotate to a using station.

In one embodiment of the invention, a second photo detection sensor is further included for detecting a rotational position of the mold changing arm.

In one embodiment of the invention, a chamfer is provided at the opening by a circular arc.

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the automatic die changing mechanism for optical cable plastic sheathing, the turntable is arranged and at least comprises two die changing arms, the die is arranged in each die changing arm, and rapid die changing can be realized by rotating the turntable;

In the automatic die changing mechanism for optical cable plastic sleeving, the die is formed by splicing the two half dies, the die is detachably arranged in the accommodating through hole, the opening is arranged on the side surface of the accommodating through hole, when the die is changed each time, the optical fiber is firstly introduced into the accommodating through hole from the opening, and because the sizes of the opening and the accommodating through hole are larger, the optical fiber can be rapidly introduced into the accommodating through hole, and then the two half dies are buckled and spliced from the two sides of the optical fiber to form an integral die, so that the optical fiber can be rapidly introduced into the conical hole, and finally the die is inserted into the accommodating through hole, thereby realizing rapid die replacement, avoiding the optical fiber passing through the conical hole in the replacement process, saving time and avoiding the damage of the optical fiber during the die penetration;

The automatic die changing mechanism for the optical cable plastic sheathing is characterized in that the die changing arm is provided with an opening communicated with the accommodating through hole, when the die changing is carried out each time, the optical fiber is not needed to be cut off, the existing die is only needed to be taken out from the accommodating through hole, the two die halves are separated and then can be taken out from the optical fiber, then the opening of the accommodating through hole of the optical fiber die changing arm is taken out, the die changing arm is rotated, the optical fiber is placed in the opening of the accommodating through hole of the other die changing arm, and the two die halves are buckled and spliced to form an integral die from two sides of the optical fiber, so that the rapid die changing can be realized.

Drawings

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:

FIG. 1 is a schematic view of the overall structure of an automatic mold changing mechanism for optical cable molding;

FIG. 2 is a schematic view of the structure of the turntable of the present invention;

FIG. 3 is a schematic view of the structure of the mold of the present invention;

Fig. 4 is a schematic structural view of the ring magnet suction mold of the present invention.

Description of the specification reference numerals: 1. a turntable; 11. a die changing arm; 12. accommodating the through hole; 13. an opening; 14. an annular groove; 15. bolt holes; 16. arc chamfering; 2. a mold; 21. a columnar mechanism; 22. a tapered bore; 23. an annular boss; 3. a ring magnet; 31. a magnet opening; 4. a first photoelectric detection sensor; 5. a turntable driving source; 6. and a second photo detection sensor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.

The invention discloses an automatic die changing mechanism for optical cable plastic sleeving, which is applied to an optical fiber plastic sleeving production line, is arranged between optical fiber paying-off equipment and sleeve injection molding equipment, can collect optical fiber bundles discharged from the optical fiber paying-off equipment, is introduced into the sleeve injection molding equipment, and forms loose sleeve or bundle tube by injection molding outside optical fibers through the sleeve injection molding equipment, so that the optical cable is protected.

In order to collect the optical fiber bundle, an optical fiber bundle mode is generally adopted, namely a die with a conical hole, optical fibers are led in from a large hole of the conical hole, are combined together in the die through a cone Kong Julong, and finally are led out from a small hole of the conical hole to achieve the effect of optical fiber bundle.

Along with the development of automation, manufacturers find that the total disassembly and replacement of the optical fiber bundling mould are more troublesome, a turntable is also arranged, optical fiber bundling moulds of different types are arranged on the turntable, the turntable is rotated when the optical fiber bundling mould of a certain type is required to be used, and the optical fiber bundling mould of the certain type is moved to the middle of optical fiber paying-off equipment and sleeve injection molding equipment, so that quick mould replacement can be realized.

In practice, the inventor of the present invention found that, each time when changing the die, although the quick die change can be realized only by rotating the turntable, after each die change, the optical fiber still needs to be cut, and then the tapered hole of the end optical fiber bundling die of the optical fiber needs to be penetrated, and each time when penetrating the die, the damage of the optical fiber is often caused, not only the waste of materials is caused, but also the production time is wasted.

Referring to fig. 1, in order to solve the above problems, the present inventors provide a novel automatic mold changing mechanism for optical cable molding, comprising: the optical fiber bundle forming device comprises a turntable 1 and a mold 2, wherein the turntable 1 is provided with the plurality of molds 2, the turntable 1 is rotated to enable the plurality of molds 2 to sequentially move to the middle of optical fiber bundle forming equipment and sleeve injection molding equipment, bundling of optical fibers is achieved through the molds 2, rapid mold changing can be achieved through rotating the turntable 1, compared with the prior art, the mold changing device is provided with the detachable molds 2 at fixed positions, the mold changing time can be shortened by adopting a mode of rotating the turntable 1 to change the molds 2, and mold changing efficiency is improved.

Referring to fig. 2, the turntable 1 includes at least two mold changing arms 11, in this embodiment, four mold changing arms 11 are provided, an angle between two adjacent mold changing arms 11 is 90 °, in other embodiments, three, six 1 or other mold changing arms 1 may be provided, and according to actual use requirements, the number of mold changing arms 11 is provided, and it should be noted that, in order to ensure that the mold changing arms 11 can rotate in place when the mold changing arms 11 are electrically rotated, a plurality of mold changing arms 11 are provided with equal angular distributions in a circumferential direction;

Each of the die changing arms 11 is provided with a receiving through hole 12, the receiving through hole 12 penetrates through the turntable 1 along the thickness direction of the turntable 1, the die 2 is inserted into the receiving through hole 12, and the die changing arm 11 is provided with an opening 13 which communicates with the receiving through hole 12.

Referring to fig. 3, the die 2 includes two half dies, the two half dies are spliced and then are disposed in the accommodating through hole 12, outer walls of the two half dies are spliced to form a columnar structure 21, the columnar structure 21 is inserted into the accommodating through hole 12, the columnar structure 21 is in clearance fit with the accommodating through hole 12, inner walls of the two half dies are spliced to form a tapered hole 22, and the tapered hole 22 is used for an optical fiber to pass through.

When the automatic die changing mechanism for optical cable plastic sleeving is adopted, optical fibers are firstly introduced into the accommodating through holes 12 from the openings 13 when the dies 2 are replaced, and because the sizes of the openings 13 and the accommodating through holes 12 are larger, the optical fibers can be rapidly introduced into the accommodating through holes 12, at the moment, the two half dies are buckled and spliced from the two sides of the optical fibers to form the integral dies 2, so that the optical fibers can rapidly enter the conical holes 22, and finally, the dies 2 are inserted into the accommodating through holes 12, thereby realizing rapid replacement of the dies 2, and the optical fibers do not need to pass through the conical holes 22 in the replacement process, thereby saving time and avoiding damage when the optical fibers pass through the dies.

In the actual production process, the length of the common optical fiber plastic is not equal to 2 km-24 km according to the requirement of a production order, but the optical fiber is 24km or 48km in an optical fiber disc generally, namely, a disc of optical fiber can produce a plurality of plastic-covered orders, and the dimensions of loose tubes required in different plastic-covered orders are different, so that the optical fiber bundling molds of different types need to be replaced in the production process; the existing optical fiber bundling mode needs threading replacement, so that the optical fiber is cut when the optical fiber bundling mode is detached and replaced every time, and the end head of the optical fiber passes through the optical fiber bundling mode again after the optical fiber bundling mode is replaced, thereby causing production discontinuity.

After the automatic die changing mechanism for optical cable plastic sheathing is adopted, as the die changing arm 11 is provided with the opening 13 communicated with the accommodating through hole 12, when the die changing is carried out each time, the optical fiber is not needed to be cut off, the existing die 2 is only needed to be taken out from the accommodating through hole 12, the two half dies are separated and then can be taken out from the optical fiber, then the opening 13 of the accommodating through hole 12 of the optical fiber die changing arm 11 is taken out, the die changing arm 11 is rotated, the optical fiber is placed in the opening 13 of the accommodating through hole 12 of the other die changing arm 11, and then the two half dies are buckled and spliced to form the integral die 2 from two sides of the optical fiber, so that the quick die changing can be realized, and the production continuity can be ensured.

Specifically, the turntable 1 of this embodiment is provided with a plurality of mold changing arms 11, and according to actual production requirements, molds 2 of different types are placed on each mold changing arm 11, in order to ensure that each mold 2 can be quickly detached on each mold changing arm 11, the aperture of the accommodating through hole 12 on each mold changing arm 11 is set to be the same, in the molds 2 of different types, the outer walls of the mold halves are spliced to form the same diameter of the columnar structure 21, the inner walls of the mold halves are spliced to form the different apertures of the conical holes 22, so that the diameter of the columnar structure 21 of the mold 2 is the same as the aperture of the accommodating through hole 12, and different molds 2 can be inserted into different mold changing arms 11.

Specifically, as previously shown, the optical fiber is introduced into the accommodating through hole 12 from the opening 13 every time the die 2 is replaced, and since the optical fiber is easily broken by bending, the circular arc chamfer 16 is provided at the opening 13, and the optical fiber is prevented from being broken by not causing a large bending of the optical fiber when the optical fiber is introduced.

In this embodiment, the optical fiber passes through the die 2, and although the optical fiber is smaller, a certain friction force is generated between the optical fiber and the die 2, under the action of the friction force, the die 2 sometimes falls off from the accommodating through hole 12, and a certain potential safety hazard exists, so that in order to solve the problem, the die 2 needs to be fixed in the accommodating through hole 12, and in reference to the prior art, the simplest technical scheme has two steps:

The outer walls of the two half molds are spliced to form a columnar structure 21, the size of the columnar structure is slightly larger than that of the accommodating through hole 12, and the mold 2 is in interference fit with the accommodating through hole 12, so that the mold 2 can be fixed in the accommodating through hole 12, but the mold 2 has certain defects, in this way, the mold 2 is difficult to take out and needs to be taken out in a knocking way, but the automatic mold changing mechanism for optical cable plastic sleeving realizes quick mold changing on the premise of not cutting an optical fiber, and if the knocking way is adopted, the optical fiber is easy to damage;

the other is to provide a bolt through hole, the bolt is pressed against the die 2 to fix the die outside, the mode is seemingly simple, and the mode is not preferable, on one hand, the bolt is pressed against the die 2 to damage the die 2, on the other hand, the mode of screwing the bolt is used for fixing the die 2, like the detachable die 2 in the prior art, a certain time is consumed, and the improvement is not significant.

Therefore, in this embodiment, in order to solve the problem of fixing the die 2, a practical solution is provided according to the running direction of the optical fiber, as shown in fig. 2 and 3, protruding steps are provided at the optical fiber inlet ends of the two half dies, after the two half dies are spliced, the two steps are spliced to form an annular boss 23, an annular groove 14 is provided at the periphery of the accommodating through hole 12, and the annular boss 23 can be inserted into the annular groove 14, so that when the optical fiber passes through the die 2, the generated friction force only pushes the annular boss 23 to press against the annular groove 14, and the die 2 is not pushed out from the accommodating through hole 12, so that the problem of quick fixing of the die 2 is solved by one design.

However, in actual use, when the mold 2 is replaced, the mold replacing arm 11 needs to be driven to move by the rotation of the turntable 1, during the process, the mold 2 is slidably arranged in the accommodating through hole 12 without being influenced by friction force of optical fibers, so that the sliding of the mold 2 is easy to occur, in order to solve the problem, the inventor continuously improves the fixing mode of the mold 2, and finds that the mold 2 is generally made of iron blocks or steel blocks and can be absorbed by magnets, therefore, the inventor thinks that the mold 2 is fixed by magnets, and referring to fig. 1 and 4, a ring magnet 3 is arranged in the ring groove 14, a magnet opening 31 is arranged at the position corresponding to the opening 13, and the ring magnet 3 absorbs and fixes the mold half, so that the mold 2 can be prevented from freely sliding in the accommodating through hole 12 by a magnetic attraction mode.

In practical use, the inventor has found that it is easy to remove the ring magnet 3 together with the mold 2 each time the mold 2 is removed, which is not desirable for the inventor, so that the ring magnet 3 needs to be absorbed into the ring groove 14 each time the mold is mounted, and some turntables 1 are made of plastic materials and do not have the ability to be absorbed, and the ring magnet 3 can be detached from the accommodating through hole 12 even if the ring magnet 3 is arranged, so that the inventor also thinks of a method for fixing the ring magnet 3, namely, arranging a plurality of bolt holes 15 around the ring groove 14 on the turntables 1, screwing the ring magnet 3 into the bolt holes 15 by adopting fixing bolts, wherein the fixing bolts can press and fix the ring magnet 3, so that the mold 2 can be removed from the accommodating through hole 12 each time, and the ring magnet 3 is still in the ring groove 14.

Referring to fig. 1, although in the present embodiment, a sufficient structure has been provided to ensure that the mold 2 does not fall out of the accommodating through hole 12, in actual production, an unexpected situation will always occur, once the mold 2 falls out of the accommodating through hole 12, the optical fiber is easily broken, and continuing production will always affect the quality of production, even causing a safety hazard, and therefore, the automatic mold changing mechanism for optical cable sheathing according to the present invention further includes a first photoelectric detection sensor 4, where the first photoelectric detection sensor 4 is used to detect the presence or absence of the annular boss 23, that is, the first photoelectric detection sensor 4 monitors in real time whether the mold 2 falls out, and when the mold 2 falls out, the first photoelectric detection sensor 4 immediately triggers a signal to control the whole production line to stop working, thereby avoiding a larger safety accident.

Referring to fig. 1, in this embodiment, in order to ensure the accuracy of rotation of the turntable 1, a turntable driving source 5 is further provided, where the turntable driving source 5 is composed of a servo motor and a speed reducer, and can only actively control rotation, so as to prevent passive rotation of the turntable 1, and ensure that the position of the mold 2 is fixed when the optical fiber is sheathed and molded, the turntable driving source 5 is connected with the turntable 1 through a rotating shaft, and the turntable driving source 5 drives the turntable 1 to rotate, so as to control rotation of different mold changing arms 11 to a use station.

In this embodiment, in order to ensure that the turntable driving source 5 can accurately drive the turntable 1 to rotate in place, a second photoelectric detection sensor 6 is further provided, where the second photoelectric detection sensor 6 is used to detect the rotation position of the mold changing arm 11, and when the second photoelectric detection sensor 6 detects that the mold changing arm 11 rotates in place, a control signal is sent to the turntable driving source 5 to control the turntable driving source 5 to stop.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. An automatic die changing mechanism for optical cable plastic sleeving, which is characterized by comprising:

the rotary table comprises at least two die changing arms, each die changing arm is provided with a containing through hole, the containing through holes penetrate through the rotary table along the thickness direction of the rotary table, and the die changing arms are provided with openings communicated with the containing through holes;

the die comprises two half dies, wherein the two half dies are arranged in the accommodating through hole after being spliced, the outer walls of the two half dies are spliced to form a columnar structure, the columnar structure is inserted into the accommodating through hole and is in clearance fit with the accommodating through hole, the inner walls of the two half dies are spliced to form a conical hole, and the conical hole is used for an optical fiber to pass through.

2. The automatic mold changing mechanism for optical cable molding according to claim 1, wherein: the optical fiber splicing device comprises a plurality of accommodating through holes, wherein the accommodating through holes are formed in the two half mold, the optical fiber inlet ends of the two half mold are provided with protruding steps, after the two half mold are spliced, the two steps are spliced to form an annular boss, the periphery of each accommodating through hole is provided with an annular groove, and the annular boss can be inserted into the annular groove.

3. The automatic mold changing mechanism for optical cable molding according to claim 2, wherein: an annular magnet is arranged in the annular groove, a magnet opening is formed in the annular magnet corresponding to the opening, and the annular magnet is fixedly attracted to the half mold.

4. The automatic mold changing mechanism for cable molding according to claim 3, wherein: the rotary table is provided with a plurality of annular grooves, a plurality of bolt holes are formed in the rotary table around the annular grooves, the annular magnets are placed in the annular grooves, the fixing bolts are screwed into the bolt holes, and the fixing bolts are pressed and fixed on the annular magnets.

5. The automatic mold changing mechanism for optical cable molding according to claim 2, wherein: the device further comprises a first photoelectric detection sensor, wherein the first photoelectric detection sensor is used for detecting whether the annular boss exists or not.

6. The automatic mold changing mechanism for optical cable molding according to claim 1, wherein: the mold comprises a plurality of molds with different types, and the molds with different types are respectively arranged on different mold changing arms.

7. The automatic mold changing mechanism for optical cable molding according to claim 6, wherein: the diameter of the accommodating through hole on each die changing arm is the same, the diameter of the columnar structure formed by splicing the outer walls of the half dies is the same in a plurality of dies with different models, and the diameter of the conical holes formed by splicing the inner walls of the half dies is different.

8. The automatic mold changing mechanism for optical cable molding according to claim 1, wherein: the rotary table driving source is connected with the rotary table through a rotating shaft and drives the rotary table to rotate, and different die changing arms are controlled to rotate to a using station.

9. The automatic mold changing mechanism for optical cable molding according to claim 8, wherein: the mold changing device further comprises a second photoelectric detection sensor, wherein the second photoelectric detection sensor is used for detecting the rotation position of the mold changing arm.

10. The automatic mold changing mechanism for optical cable molding according to claim 1, wherein: and an arc chamfer is arranged at the opening.