CN218315122U - Polygonal plastic optical fiber mold cover - Google Patents
Polygonal plastic optical fiber mold cover Download PDFInfo
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- CN218315122U CN218315122U CN202222216859.9U CN202222216859U CN218315122U CN 218315122 U CN218315122 U CN 218315122U CN 202222216859 U CN202222216859 U CN 202222216859U CN 218315122 U CN218315122 U CN 218315122U
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- optical fiber
- plastic optical
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Abstract
The utility model provides a polygon plastics optic fibre mould lid, including the mould lid body with locate the die orifice on the mould lid body, the die orifice includes that at least three main circular arc section and a plurality of being used for connect adjacently the radius section of main circular arc section, main circular arc section is inside sunken setting, the radius section is outside protruding setting. The utility model provides a traditional mould can not produce the technical problem of polygonal plastic optical fiber.
Description
Technical Field
The utility model relates to an optic fibre processing technology field especially relates to a polygon plastics optic fibre mould lid.
Background
Fig. 1 shows a process for manufacturing a plastic optical fiber, in which a core material and a cladding material are respectively added into a core extruder 1 and a cladding extruder 2, the two materials are extruded from the same co-extrusion die 3 in a molten state (i.e., the core material and the cladding material are respectively introduced into two channels of the co-extrusion die 3, the two channels are merged at the end of the co-extrusion die 3 (i.e., the die cover of the co-extrusion die 3), the core material and the cladding material are extruded together, and the core material is embedded in the center of the cladding), and then the core material and the cladding material are detected by a laser diameter measuring instrument 4 after being stretched and cooled to form the plastic optical fiber, and finally the plastic optical fiber is drawn and palletized.
The utility model discloses a chinese utility model patent that publication number is CN213472123U, the name is an optic fibre gravity coating mould combination formula extrusion tooling, and this mould has the center to extrude the dish at the top surface middle part gomphosis of mould main part, and the surface middle part that the dish was extruded to the center has seted up the optic fibre through-hole, utilizes combination formula extrusion tooling to pass through the optic fibre through-hole in order to form plastic optical fibre. The die orifice of the die is circular, the section of the plastic optical fiber extruded through the die orifice is also circular, and the cylindrical plastic optical fiber can be installed only by sleeving a layer of skirt sheath on the cylindrical plastic optical fiber, so that the luminous uniformity of the cylindrical plastic optical fiber is influenced.
SUMMERY OF THE UTILITY MODEL
To exist not enough among the prior art, the utility model provides a polygon plastic optical fiber mold cover to traditional mould can not produce the technical problem of polygonal plastic optical fiber in solving the correlation technique.
The utility model provides a polygon plastics optic fibre mould lid, include the mould lid body and locate the die orifice on the mould lid body, a serial communication port, the die orifice includes that at least three main circular arc section and a plurality of being used for connect adjacently the radius section of main circular arc section, main circular arc section is inside sunken setting, the radius section is outside protruding setting.
Compared with the prior art, the utility model discloses following beneficial effect has: the core layer material and the cladding layer material can be converged at a die orifice, the main arc section can become the edge of the polygonal plastic optical fiber at the moment, and the inverted section can become the vertex angle of the polygonal plastic optical fiber, so that the plastic optical fiber with a corresponding polygonal structure is formed; the inward concave main arc segment can avoid the extrusion and expansion of the plastic melt under the action of traction and stretching; the outward convex round section can rapidly form the vertex angle of the plastic optical fiber so as to form the polygonal plastic optical fiber; the polygonal plastic optical fiber has good flexibility and good light-emitting uniformity, has wide size specification range and can continuously and stably produce any length.
Further, the arc length of the main arc segment is l 1 The arc length of the rounding section is l 2 And l is 1 And l 2 Satisfy l 1 ＞l 2 。
Further, the radius of the main circular arc section is r 1 The radius of the rounding section is r 2 And r is 1 And r 2 Satisfy r 1 ＞r 2 。
Further, the distance from the circle center of the main arc section to the circle center of the die cover body is d 1 The distance from the circle center of the rounding section to the circle center of the die cover body is d 2 And d is 1 And d 2 Satisfy d 1 ＞d 2 。
Further, the mould lid body is including being located the first terminal surface and the second terminal surface of die orifice both sides, be equipped with on the first terminal surface with the hole of stepping down that the die orifice is linked together, the hole of stepping down is the toper structure, and its minor diameter end is close to the die orifice.
Furthermore, a guide hole communicated with the die orifice is formed in the second end face, and the guide hole gradually shrinks from the second end face to the first end face.
Further, the second end face is provided with a mounting groove which is sunken towards the direction of the first end face.
Further, the mounting groove and the die cover body are coaxially arranged.
Drawings
FIG. 1 is a view showing a process for manufacturing a plastic optical fiber;
fig. 2 is a schematic structural diagram of a mold cover according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of FIG. 2 at another angle;
fig. 4 is a schematic structural diagram of a die in an embodiment of the present invention.
The reference numbers illustrate:
1. a core layer extruder; 2. a coating layer extruder; 3. co-extrusion mould; 4. a laser caliper; 5. a mold cover body; 51. a first end face; 52. a second end face; 6. a die orifice; 61. a main circular arc segment; 62. a rounding section; 7. a hole for abdication; 8. a guide hole; 9. and (7) installing a groove.
The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly understood, the following technical solutions of the present invention are further described with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2 to 4, the utility model provides a polygon plastics optic fibre mould lid, include mould lid body 5 and locate mould mouth 6 on the mould lid body 5, mould mouth 6 includes that at least three main circular arc section 61 and a plurality of being used for connect adjacently the radius section 62 of main circular arc section 61, main circular arc section 61 is inside sunken setting, radius section 62 is outside protruding setting.
In this embodiment, in order to prepare a plastic optical fiber with a polygonal cross section, as shown in fig. 2, the die orifice 6 on the die cover body 5 includes a main arc section 61 and a rounded section 62, and the rounded section 62 is used to connect adjacent main arc sections 61 (as shown in fig. 4, in this embodiment, four main arc sections 61 and four rounded sections 62 are taken as an example, and a die orifice 6 can be formed therebetween in an enclosing manner to prepare a plastic optical fiber with a square cross section, in other embodiments, the cross-sectional shape of the plastic optical fiber is changed by increasing or decreasing the number of the main arc sections 61 and the rounded sections 62, for example, three main arc sections 61 and three rounded sections 62 are provided, so that a plastic optical fiber with a triangular cross section can be prepared, and certainly, the number of non-cylindrical main arc sections 61 and non-cylindrical main arc sections 62 such as a rectangle, a pentagon, a hexagon, and the like, and so on, no limitation is made); furthermore, the main arc section 61 is arranged in an inward concave manner to avoid the extrusion and expansion of the plastic melt under the action of traction and stretching, and the outward convex rounded section 62 can rapidly form the vertex angle of the plastic optical fiber so as to form the polygonal plastic optical fiber; the polygonal plastic optical fiber can be prepared through the shape limitation of the main circular arc section 61 and the inverted circular section 62, has the advantages of good flexibility, good light-emitting uniformity, wide range of optical fiber size specification, continuous and stable production of any length and the like, does not need to be sheathed with a skirt sheath when being installed, and further ensures the light-emitting uniformity and flexibility.
The preparation process of the plastic optical fiber comprises the following steps:
polymethyl methacrylate is selected as a core layer material, and PVDF fluororesin is selected as a cladding material, wherein the light transmittance of the polymethyl methacrylate is more than 92%, and the refractive index of the polymethyl methacrylate is 1.49; the light transmittance of the PVDF fluororesin is not less than 90%, and the refractive index is 1.40; the light-transmitting performance of the optical fiber is ensured by selecting the core layer material with high light transmittance, and the light-transmitting performance of the square plastic optical fiber is ensured by adopting PVDF fluororesin as a cladding material.
In order to reduce the use cost of the square plastic optical fiber, polystyrene can be selected as a core material, and polymethyl methacrylate is selected as a cladding material. The light transmittance of the polystyrene is 92%, and the refractive index of the polystyrene is 1.60; the light transmittance of the polymethyl methacrylate is not less than 93 percent, and the refractive index is 1.49; the end light performance of the optical fiber is ensured by selecting the core layer material with high light transmittance, and the side light performance of the optical fiber is ensured by adopting the polymethyl methacrylate as the cladding material.
The arc length of the main circular arc section 61 is l1, the arc length of the inverted circular section 62 is l2, and l1 and l2 satisfy that l1 is larger than l2.
In this embodiment, in order to enable the main circular arc section 61 and the inverted circular section 62 to be formed into a plastic optical fiber with a polygonal structure, as shown in fig. 4, the arc length of the main circular arc section 61 is defined as l1, the arc length of the inverted circular section 62 is defined as l2, and l1 > l2; the radius of the main circular arc section 61 is defined as r1, the radius of the inverted circular section 62 is defined as r2, and r1 is greater than r2; in this way, each main circular arc section 61 can form each side length of the polygon, and each rounding section 62 can form each vertex angle of the polygon, so that the cross section of the plastic optical fiber passing through the die 6 can be in a polygonal structure, and the original cylindrical die 6 is replaced.
The distance from the circle center of the main circular arc section 61 to the circle center of the die cover body 5 is d1, the distance from the circle center of the inverted circular section 62 to the circle center of the die cover body 5 is d2, and d1 and d2 satisfy that d1 is larger than d2.
In this embodiment, as shown in fig. 4, the distance from the center of a circle of the main circular arc section 61 to the center of a circle of the mold cover body 5 is defined as d1, the distance from the center of a circle of the inverted circular arc section 62 to the center of a circle of the mold cover body 5 is defined as d2, and d1 > d2, so, the main circular arc section 61 can be arranged in a concave manner in the direction of the center of a circle of the mold cover body 5, so as to eliminate the influence of the melt swelling behavior, the inverted circular arc section 62 can be arranged in a convex manner in the direction of the center of a circle of the mold cover body 5, so that the vertex angle of the polygon can be formed under the cooperation with the adjacent main circular arc section 61, and the plastic optical fiber with the polygonal cross section can be prepared under the common cooperation of the main circular arc section 61 and the inverted circular arc section 62.
The die cover body 5 comprises a first end face 51 and a second end face 52 which are positioned at two sides of the die orifice 6, wherein the first end face 51 is provided with a yielding hole 7 communicated with the die orifice 6, the yielding hole 7 is of a conical structure, and the small diameter end of the yielding hole is close to the die orifice 6.
In this embodiment, the mold cap body 5 includes a first end surface 51 and a second end surface 52 located at two sides of the mold opening 6, as shown in fig. 2, in order to give way to the plastic optical fiber extruded from the mold opening 6, a giving way hole 7 communicated with the mold opening 6 is provided on the first end surface 51, the giving way hole 7 is in a tapered structure, and a small diameter end thereof is disposed near the mold opening 6, so that the plastic optical fiber is rapidly discharged after being molded by the mold opening 6, and the shielding thereof is reduced,
the second end surface 52 is provided with a guide hole 8 communicated with the die orifice 6, and the guide hole 8 gradually shrinks from the second end surface 52 to the first end surface 51.
In this embodiment, as shown in fig. 3, in order to guide the core layer material and the cladding layer material, the second end surface 52 is provided with a guide hole 8 communicated with the die orifice 6, and the guide hole 8 is gradually contracted from the second end surface 52 to the first end surface 51, so that the core layer material and the cladding layer material enter the die orifice 6 through the guide hole 8 to be rapidly molded.
The second end surface 52 is provided with a mounting groove 9 recessed toward the first end surface 51.
In this embodiment, in order to facilitate the installation of the mold cover body 5, the second end surface 52 of the mold cover body 5 is provided with the mounting groove 9 recessed toward the first end surface 51 thereof, and the mounting groove 9 is adapted to the external fastener, so as to install the mold cover body 5 on the mold. Further, the mounting groove 9 and the mold cover body 5 are coaxially arranged, so that the concentricity between the mold opening 6 and the plastic optical fiber and the concentricity between the mold cover body 5 and the mold are ensured.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (8)
1. The utility model provides a polygon plastics optic fibre mould lid, includes the mould lid body and locates the nib on the mould lid body, its characterized in that, the nib includes that at least three main circular arc section and a plurality of be used for connecting adjacently the radius section of main circular arc section, main circular arc section is inside sunken setting, the radius section is outside protruding setting.
2. The polygonal plastic optical fiber mold cover according to claim 1, wherein the major circular arc segment has an arc length of l 1 The arc length of the rounding section is l 2 And l is 1 And l 2 Satisfy l 1 ＞l 2 。
3. The polygonal plastic optical fiber mold cap as claimed in claim 1, wherein the radius of the major circular arc segmentIs r 1 The radius of the rounding section is r 2 And r is 1 And r 2 Satisfy r 1 ＞r 2 。
4. The polygonal plastic optical fiber mold cover according to claim 1, wherein the distance from the center of the main circular arc segment to the center of the mold cover body is d 1 The distance from the circle center of the inverted circle section to the circle center of the die cover body is d 2 And d is 1 And d 2 Satisfy d 1 ＞d 2 。
5. The polygonal plastic optical fiber mold cover according to any one of claims 1 to 4, wherein the mold cover body comprises a first end surface and a second end surface which are positioned at two sides of the mold opening, the first end surface is provided with a abdicating hole communicated with the mold opening, the abdicating hole is in a conical structure, and the small diameter end of the abdicating hole is close to the mold opening.
6. A polygonal plastic optical fiber mold cap according to claim 5, wherein said second end face is provided with a guide hole communicating with said die opening, said guide hole being gradually narrowed from said second end face to said first end face.
7. The polygonal plastic optical fiber mold cover according to claim 5, wherein the second end face is provided with a mounting groove recessed toward the first end face.
8. The polygonal plastic optical fiber mold cover according to claim 7, wherein the mounting groove is coaxially disposed with the mold cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222216859.9U CN218315122U (en) | 2022-08-19 | 2022-08-19 | Polygonal plastic optical fiber mold cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222216859.9U CN218315122U (en) | 2022-08-19 | 2022-08-19 | Polygonal plastic optical fiber mold cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218315122U true CN218315122U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222216859.9U Active CN218315122U (en) | 2022-08-19 | 2022-08-19 | Polygonal plastic optical fiber mold cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218315122U (en) |
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2022
- 2022-08-19 CN CN202222216859.9U patent/CN218315122U/en active Active
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