CN109626842A - A kind of coating die and coating method of the replaceable mold core of drawing optical fibers - Google Patents

Abstract

The present invention relates to the coating dies and coating method of a kind of replaceable mold core of drawing optical fibers, the mold includes upper mold, middle mould, lower die, upper mold core, lower mold core, upper mold core is placed in upper mold, lower mold core is placed in lower die, the mold core of mold is replaceable according to coating size requirements, on, in, lower die is integrated, the structure can be applied in the internal layer coating die and outer layer coating die of drawing optical fibers, it has the technical effect that smooth using the coating layer surface of optical fiber after the structure, zero defect, it is simple and easy to use, it is tested for special optical fiber wire drawing, strong flexibility, save raw material, it is practical, furthermore the mould structure is applicable not only to coating large-diameter fibre-optical, it can also extend in the optical fiber coating of other sizes simultaneously, import substitutes, save the cost.

Description

A kind of coating die and coating method of the replaceable mold core of drawing optical fibers

Technical field

The present invention relates to a kind of coating die of drawing optical fibers, in particular to the painting of a kind of replaceable mold core of drawing optical fibers Cover mold and coating method.

Background technique

In recent years, it large scale energy-transmission optic fibre and mixes rare earth type optical fiber and quickly grows, quartz coating cladding diameter breaches 1mm, user for coat diameter proportion there is miscellaneous requirements；This just needs a large amount of different molds to complete different paintings Cover the wire drawing task of size；At present all by import foreign countries wire drawing coating die, the price is very expensive for external wire drawing coating die, Buying Cycle is long, delays work and mistakes, at high cost, and the present invention can well solve problem above.

Summary of the invention

In order to better meet application requirement, cost is saved, meanwhile, the verifying of more sizes coating diameters is easily carried out, Guarantee that special optical fiber can reach optimal performance, the present invention provide a kind of replaceable mold core of drawing optical fibers coating die and Coating method, specific technical solution are a kind of coating dies of the replaceable mold core of drawing optical fibers, including upper mold, middle mould, under Mould, upper mold core, lower mold core, it is characterised in that: the upper mold is the stepped cylinder for having cone, cone and cylinder Body junction has external screw thread and the internal screw thread of middle mould to match, and has a boss at the top of upper mold cone, inside there is circular hole, upper mold core It is embedded in circular hole tight matched；There is central through hole in cylindrical body, it is concentric with circular hole in boss and communicate, it is another in cylindrical body There are two parallel ring packing groove Is on the periphery at end, two O-ring seals are covered in groove I, is supplied with coating Sealing is played the role of in the cooperation of glassware tensioner；The middle mould is a cylindrical body, has a cross on the periphery of cylindrical member at one end T-slot is constituted to groove and radial groove, path is inputted for coating material, makes on transverse concave groove there are four symmetrical radial through-hole The internal cavity of mold is communicated with the loader of coating, there is ring packing groove II on middle mould other end periphery, O-shaped close Seal covers in groove II；It is identical with stepped cylinder one end size that upper mold has cone that the inner face of cylindrical member at one end has Pyramid type groove and stepped hole have internal screw thread identical with external screw thread, inside there is center ladder hole, large pore hole and lower die The cooperation of four through-holes, small-diameter circular cylinder cooperation, in the other end face of middle mould, there are four screw holes and lower die fastening to use, The internal screw thread of middle mould is tightened on the external screw thread of upper mold, constitutes die combination up and down；The lower die is two rank cylindrical bodies, small There is conical socket in diameter end inner end, and lower mold core bullet is embedded in conical socket to be fitted close therewith, and center has ladder logical Hole has on one end face of major diameter and is symmetrically arranged four through-holes, four screw holes；The upper mold core is the cylinder with centre bore Body, the lower mold core are the cylindrical body that a headband has bullet, and there is through-hole at center；

The projection section of lower die is inserted into the middle mould large aperture hole of die combination up and down, with four hexagon socket head cap screws, four tops Silk screw is connected as one, by tighten squeeze after at tight fit, be allowed to possess good concentricity and leakproofness, constitute mold It is whole；The drawing optical fibers coating die of replaceable mold core can be used as internal layer coating die and outer layer coating die, but Upper mold core, the internal diameter of lower mold core are different, and upper mold core diameter is greater than lower die core diameter, 50 ~ 150um of range.

Coating step is as follows:

(ii), the protection gas and cooling water for checking wire-drawer-tower, start to warm up after pressure is errorless；

(ii), the inside and outside layer that the internal layer coating die of replaceable mold core and outer layer coating die are filled to wire-drawer-tower respectively is applied into cup In, so that the central aperture of upper mold is applied the discharge port of cup；

(iii), prefabricated rods parameter and control parameter are input in the computer of wire-drawer-tower；

(iv), the heating furnace of wire-drawer-tower reach carry out optical fiber after set temperature draw silk work, by optical fiber around to the plastics of admission machine On bucket；

(v), delivery speed is constantly regulate to increase fibre cladding diameter, and opens the feed switch of the outer application system of wire-drawer-tower With outer layer UV cure lamp, the feed switch and internal layer UV cure lamp of interior application system are opened after outer coat is in stable condition；

(vi), adjusting technological parameter makes the cladding thickness of optical fiber reach user's requirement, and adjusting application system parameter makes coating procedure just Often operation；

(vii), cooling is shut down after drawing certain length optical fiber, terminates wire drawing work.

The solution have the advantages that use process is flexible, the change in mold aperture can be more easily carried out, is saved The time for waiting gate-in mold system, substantially increase conventional efficient；Save the cost simultaneously, reduces the consumption of enterprise, to domestic big ruler The production domesticization of very little energy-transmission optic fibre, rare earth-doped fiber has important impetus, and silica clad size can be determined Special optical fiber, the verifying of the more sizes coating diameters of flexible and convenient progress reduces the cost of drawing process, can more added with The guarantee special optical fiber of effect can reach optimal performance.

Detailed description of the invention

Fig. 1 is cross-sectional view of the structure of the invention；

Fig. 2 is Structure explosion diagram of the invention；

Fig. 3 is upper die structure figure of the invention；

Fig. 4 is middle mode structure main view of the invention；

Fig. 5 is middle mode structure top view of the invention；

Fig. 6 is lower die structure main view of the invention；

Fig. 7 is lower die structure top view of the invention；

Fig. 8 is upper mold core structure chart of the invention；

Fig. 9 is lower mold core structure chart of the invention；

Figure 10 is lower mold core and lower die concentric locating figure of the invention.

Specific embodiment

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in Fig. 1~Figure 10, upper mold 1, middle mould 2, lower die 3, upper mold core 4, lower mold core 5 are by high-precision slow wire feeding electrical fire Discharge machine bed retrofit forms,

Upper mold 1 is unitary mould top half, and 1 function of upper mold is that optical fiber is made to pass through upper mold core 4.

Middle mould 2 is the coating chamber of coating die, is fixed as upper middle die combination structure with upper mold 1, purpose is to make optical fiber in mould Stable, continuous wet face state is formed in tool with coating.

Lower die 3 is mold lower part, primarily serves the effect for limiting optical fiber coating diameter, middle mould 2 is with lower die 3 in M3*12 Hex(agonal)screw is connected as one, and 3 bottom face other four hole of lower die screws in M3 jackscrew；

Upper mold core 4, lower mold core 5 are made of alloy, and core is obtained by laser boring.

Upper mold 1 is the cylindrical body for having cone, and cone and cylindrical body junction have in external screw thread 1-2 and middle mould 2 The internal screw thread 2-1 in portion is matched, and has central through hole 1-3 in cylindrical body, there is parallel two on the periphery of the cylindrical body other end A ring packing groove 1-5 inside by two sealing o type snares plays sealing with the cooperation of paint feeder tensioner Effect；Have at the top of 1 cone of upper mold a boss, it is interior have a circular hole 1-4, upper mold core 4 by way of inlaying with 1-4 close-fitting It closes；Middle mould 2 is a cylindrical body, and cylinder has a transverse direction to embed groove 2-2 on outside, and vertical another groove 2-3 constitutes T-type Slot；The effect of the T-slot is that coating material inputs path；Make mold there are four symmetrical vertical through hole 2-4 on embedded groove 2-2 Internal cavity communicated with the loader of coating, embed groove 2-2 in periphery and enable side there is also ring packing groove 2- 8, o type snare is sealed inside groove 2-8, is cooperated up and down with the ring packing sealing o type circle of groove 1-5, is applied being placed in Tensioner plays the role of gasket coating in material loader, leak out coating will not between sealing ring；The T-type of middle mould 2 There is internal screw thread 2-1 identical with 1 cone size external screw thread 1-2 of upper mold in one side end face at slot bottom end, inside there is central through hole 2- 5, the other end of middle mould 2, there are four screw hole 2-6, fastening purpose is played in effect；The internal screw thread 2-1 of middle mould 2 is tightened in On the external screw thread 1-2 of upper mold 1, die combination up and down is constituted；Lower die 3 is stepped cylinder, interior has central through hole 3-1, one end There is conical socket at center in the middle mould 2 of outer diameter and upper and lower die combination, and the other end, which has, is symmetrically arranged four through-hole 3-2, four spiral shells Nail hole 3-3, central through hole 3-1 and the lower mold core 5 of boss are tightly fixed, and the upper mold core 4 is the cylinder with centre bore Body, lower mold core 5 are outer male conical and cylindrical body interlocking matrix with central through hole, and upper mold core 4 is embedded in the boss of upper mold 1 respectively In, the lower mold core 5 with taper is placed in the boss 3-4 of the lower die 3 with identical taper, then by the boss 3-4 of lower die 3 Partial insertion in the middle mould 2 of die combination, is connected as one up and down with four hexagon socket head cap screws, four jackscrew screws, by twisting At tight fit after tight extruding, it is whole to constitute mold.

Concrete operation method with steps are as follows:

(1) the protection gas and cooling water for checking wire-drawer-tower, start to warm up after pressure is errorless；

(2) the inside and outside layer that internal layer mold and outer layer mold of the invention are filled to wire-drawer-tower respectively is applied in loader, makes to be fed The feed inlet of device is aligned with the vertical through hole 2-4 of mold, by the o type circle being placed at mold 1-5 and groove 2-8, makes its tensioner In loader, guarantee that outside leakage does not occur for coating, guarantee the coating process of normal wire drawing, if there are many apply for special optical fiber Size requirement is covered, mold core 5 can be replaced rapidly according to demand, the requirement of target size needed for meeting user；

(3) prefabricated rods parameter and control parameter are input in the computer of wire-drawer-tower；

(4) heating furnace of wire-drawer-tower reach carry out optical fiber after set temperature draw silk work；

(5) delivery speed is constantly regulate to increase fibre cladding diameter, and opens the feed switch of the outer application system of wire-drawer-tower With outer layer UV cure lamp, the feed switch and internal layer UV cure lamp of interior application system are opened after outer coat is in stable condition；

(6) adjusting technological parameter makes the cladding diameter of optical fiber reach 1mm or so, and adjusting application system parameter keeps coating procedure normal Operation, by optical fiber around on the winding barrel of admission machine；

(7) cooling is shut down after drawing certain length optical fiber, terminates wire drawing work.

In conclusion the present invention provides a kind of solutions of coating die structure for special optical fiber.The present invention Mode in being not limited to the above embodiment, to those of ordinary skill in the art, before according to the principle of the invention It puts, can also make corresponding adjustment as the case may be, Suitable content is also within protection scope of the present invention.

Advantages of the present invention:

This wire-drawing die has important impetus to the production domesticization of domestic large scale energy-transmission optic fibre, rare earth-doped fiber, The special optical fiber that can be determined for silica clad size, the verifying of the more size coating diameters of flexible and convenient progress, reduces The cost of drawing process, can significantly more efficient guarantee special optical fiber can reach optimal performance；The design can improve use Flexibility in the process can more easily carry out the change in mold aperture, save the waiting time for waiting gate-in mold system, greatly Conventional efficient is improved greatly；Simultaneously can save the cost, reduce the consumption of enterprise.

Claims (3)

1. a kind of drawing optical fibers coating die of replaceable mold core, including upper mold (1), middle mould (2), lower die (3), upper mold core (4), lower mold core (5), it is characterised in that: the upper mold (1) is the stepped cylinder for having cone, cone and cylinder Body junction has external screw thread (1-2) to match with the internal screw thread (2-1) of middle mould (2), has at the top of upper mold (1) cone one convex Platform inside has circular hole (1-4), and upper mold core (4) is embedded in circular hole (1-4) tight fit therewith；There is central through hole (1- in cylindrical body 3), concentric with circular hole in boss (1-4) and communicate, there are two parallel ring packings to use on the periphery of the cylindrical body other end Groove I (1-5), two O-ring seals is covered inner in groove I (1-5), plays the work of sealing with the cooperation of paint feeder tensioner With；The middle mould (2) is a cylindrical body, has a transverse concave groove (2-2) and radial groove on the periphery of cylindrical member at one end (2-3) constitutes T-slot, inputs path for coating material, makes mold there are four symmetrical radial through-hole (2-4) on transverse concave groove Internal cavity is communicated with the loader of coating, is had ring packing groove II (2-8) on middle mould (2) other end periphery, O-shaped Sealing snare is inner in groove II (2-8), and the inner face of cylindrical member at one end has pyramid type groove identical with upper mold (1) size and rank Terraced hole, have with external screw thread (1-2) identical internal screw thread (2-1), inside have center ladder hole (2-5), large pore hole (2-7) Cooperate with four through-holes (3-2) of lower die (3), small-diameter circular cylinder cooperation, in the other end face of middle mould (2), there are four spiral shells Nail hole (2-6) and lower die (3) fastening are used, and the internal screw thread (2-1) of middle mould (2) is tightened on the external screw thread (1-2) of upper mold (1), structure At upper and lower die combination；The lower die (3) is two rank cylindrical bodies, and there are conical socket (3-4), lower die in minor diameter one end inner end Core (5) bullet is embedded in conical socket (3-4) and is fitted close therewith, and center has ladder hole (3-1), one end face of major diameter On have be symmetrically arranged four through-holes (3-2), four screw holes (3-3)；The upper mold core (4) is the cylinder with centre bore Body, the lower mold core (5) are the cylindrical body that a headband has bullet, and there is through-hole at center；By portion boss (3-4) of lower die (3) Divide and be inserted into middle mould (2) the large aperture hole (2-7) of die combination up and down, with four hexagon socket head cap screws, four jackscrew screws connections Be integrated, by tighten squeeze after at tight fit, be allowed to possess good concentricity and leakproofness, it is whole to constitute mold.

2. a kind of coating die of the replaceable mold core of drawing optical fibers as described in claim 1, it is characterised in that: the light The fine wire drawing coating die of replaceable mold core can be used as internal layer coating die and outer layer coating die, but upper mold core (4), lower die The internal diameter of core (5) is different, and upper mold core (4) diameter is greater than lower mold core (5) diameter, 50 ~ 150um of range.

3. using a kind of coating method of the drawing optical fibers described in claim 1 with the coating die of replaceable mold core, feature Be: coating step is as follows,

(i), check and started to warm up after the protection gas of wire-drawer-tower and cooling water, pressure are errorless；

(ii), the inside and outside layer that the internal layer coating die of replaceable mold core and outer layer coating die are filled to wire-drawer-tower respectively is applied into cup In, so that the central aperture of upper mold (1) is applied the discharge port of cup；

(iii), prefabricated rods parameter and control parameter are input in the computer of wire-drawer-tower；

(iv), the heating furnace of wire-drawer-tower reach carry out optical fiber after set temperature draw silk work, by optical fiber around to the plastics of admission machine On bucket；

(v), delivery speed is constantly regulate to increase fibre cladding diameter, and opens the feed switch of the outer application system of wire-drawer-tower With outer layer UV cure lamp, the feed switch and internal layer UV cure lamp of interior application system are opened after outer coat is in stable condition；

(vi), adjusting technological parameter makes the cladding thickness of optical fiber reach user's requirement, and adjusting application system parameter makes coating procedure just Often operation；

(vii), cooling is shut down after drawing certain length optical fiber, terminates wire drawing work.