CN100410039C

CN100410039C - Extrusion molding method for ceramic pin blank tube with core and extrusion head thereof

Info

Publication number: CN100410039C
Application number: CNB2004100614207A
Authority: CN
Inventors: 李元科
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-24
Filing date: 2004-12-24
Publication date: 2008-08-13
Anticipated expiration: 2024-12-24
Also published as: CN1631634A

Abstract

The present invention relates to a core containing extrusion moulding method of a ceramic needle thrusting parison tube and an extrusion head thereof. The method is characterized in that extrusion pug material is extruded and moulded with an extrusion machine containing the extrusion head into a needle thrusting material containing a core wire, after alignment and drying, the needle thrusting material is processed through mechanical processing to be made into a needle thrusting biscuit, and the needle thrusting parison tube is obtained through degreasing and high-temperature sintering. The present invention has the advantages that the parison tube is easy to process, precision is high, etc.

Description

Ceramic contact pin base pipe contain core extruding forming method and extruder head thereof

Technical field

What the present invention relates to a kind of ceramic contact pin base pipe contains core extruding forming method and extruder head thereof, especially contains core extruding forming method and extruder head thereof as the ceramic contact pin base pipe of the joints of optical fibre.

Background technology

At the widely used joints of optical fibre of fiber optic communication field is to be used for the passive device that the optical fiber break-make connects, and its core parts are fixed fibers and make its ceramic contact pin coaxially to each other.Ceramic contact pin is a kind of ceramic tubule of the 0.125mm of having aperture.The external diameter of model at present commonly used is 10.5mm for 2.5mm length.For efficient and the reliability that guarantees Optical Fiber Transmission, the dimensional accuracy of this ceramic contact pin cylindrical and endoporus and axiality require all in 0.5 μ.

Ceramic contact pin is with after certain additive mixes with ceramic powder, make the biscuit that requires shape with extruding forming method, drying, degreasing and high temperature sintering obtain contact pin base pipe again, and the base pipe becomes the ceramic contact pin product after the Precision Machining of external diameter, endoporus and end.Produce high-precision ceramic contact pin product, at first must obtain high-precision ceramic contact pin base pipe.In the forming process of base pipe, the forming technique of aperture comprises the axiality and the higher production efficiency of the size, aperture and the cylindrical that how to guarantee aperture, has constituted the technological core and the technological difficulties of ceramic contact pin and base pipe manufacturer thereof.

At present, existing ceramic contact pin base pipe manufacturer mostly adopts injection molding technology.Form injection molding by one group of eight former with holes with by the formpiston that the mould pin of eight correspondences constitutes.During matched moulds, eight mould pins insert eight nibs respectively, and are positioned at the positive center of nib.Ceramic slurry after the heating is injected under pressure in the nib, and cooling just obtains eight ceramic cylinders that have central small hole, i.e. the ceramic contact pin biscuit after the demoulding a little.Biscuit just becomes ceramic contact pin base pipe through high temperature sintering.Obtain high-quality ceramic contact pin product in order further to process, the accuracy of manufacture of base pipe requires very high, and particularly the axiality of endoporus and external diameter must not be greater than 0.05mm.

In Japan, a kind of extruding forming method of producing ceramic contact pin base pipe is also arranged, use thermoplastic, on extruder, be extruded as long biscuit with holes, behind the sintering, with the method for accurate grinding it cut off again, chamfering and processing guiding taper hole become the ceramic contact pin product.When there is sintering in this method, the easy flexural deformation of elongated biscuit; In the machining to the base pipe, grinding process more complicated not only, and to the precision of grinding machine and the durability of emery wheel problem such as all have higher requirements.

Summary of the invention

What the object of the present invention is to provide a kind of ceramic contact pin base pipe contains core extruding forming method and extruder head thereof, and it can reduce the mechanical processing difficulty of mould manufacture difficulty and base pipe and guarantee the required precision of base pipe.

The technical scheme that realizes the object of the invention is: a kind of ceramic contact pin base pipe contain the core extruding forming method, it is characterized in that: extruding pug extrusion molding in containing the extruder of extruder head is the contact pin material that includes the core silk, material is after alignment and oven dry, extract the core silk and promptly obtain central small hole, again the contact pin material is carried out machining and makes it become the contact pin biscuit, obtain contact pin base pipe through degreasing and high temperature sintering then.

And skimming temp is 200～500 ℃, and sintering temperature is 1200-1550 ℃.

The technical scheme that realizes the object of the invention also comprises: the extruder head of a kind of ceramic contact pin base pipe moulding, comprise die body, die orifice and stock mould up and down, its distinctive feature is: be provided with a core rod pipe holder in the lower mold body, be distributed with pod apertures around this support, other has a radial hole to core rod pipe and stock mould guiding core silk, this aperture is between pod apertures, and the outer wall of lower mold body is provided with the adjustment screw of regulating the stock mould radial position.

And, one little cone is arranged at the bottom of core rod pipe holder, stud with the core rod pipe in the cone, there are two sections taper holes the inside of die orifice, the cone angle of top taper hole is 40 °～50 °, and the tapering of bottom taper hole is 1: 50～1: 20, is loading head, branch flow cone and piston on the core rod pipe holder, the typing hole of decision contact pin biscuit external diameter size is arranged in the stock mould, and there is chamfering the lower end in typing hole.

And corresponding stock mould place is uniform-distribution with 3～4 adjustment screw around lower mold body, and the afterbody of screw contacts with stock mould, and the gland of restriction stock mould axial location is connected with the bottom of lower mold body.

Advantage of the present invention is: 1. the present invention takes first extrusion molding, treats promptly to carry out machining after the alignment oven dry, carries out degreasing and high temperature sintering at last again.Like this, before workpiece is not sinter-hardened as yet, promptly carry out alignment and machining, not only reduced mechanical processing difficulty, and reduced processing cost and helped satisfying the workpiece accuracy requirement; 2. this method and extruder head are simply suitable, and material is not had specific (special) requirements, thereby the easy dismounting and change of stock mould can be made the ceramic contact pin base pipe of different size easily.3. can move radially stock mould by adjustment screw, thereby guarantee the axiality of core silk and contact pin material cylindrical.4. can contain core pottery material by continuous generation of the mode of extrusion molding, the axiality of the diameter of material inner core silk, core silk and material external diameter can be adjusted and control accurately.Contact pin material after the oven dry can be processed into the shape and size of all size easily.This kind method can serialization, produce the ceramic contact pin base pipe that meets product requirement in large quantity, does not need high-precision production equipment, and ceramic material is not had special requirement yet, so the production small investment, product cost is low, kind can variation.

Description of drawings

Fig. 1 is the schematic diagram that the present invention contains the core extrusion molding.

Fig. 2 is the structure chart that contains first embodiment of core extrusion molding apparatus.

Fig. 3 is the structure chart that contains second embodiment of core extrusion molding apparatus.

Fig. 4～Fig. 6 is the biscuit of ceramics of contact pin material through several different sizes of machining formation.

The specific embodiment

With reference to Fig. 1～Fig. 6, of the present invention be a kind of ceramic contact pin base pipe contain the core extruding forming method, it is characterized in that: extruding pug 12 extrusion molding in containing the extruder of extruder head is the contact pin material 10 that includes core silk 9, material 10 is after alignment and oven dry, extract core silk 9 and promptly obtain central small hole 20, again contact pin material 10 is carried out machining and makes it become contact pin biscuit 18.1,18.2,18.3, obtain contact pin base pipe through degreasing and high temperature sintering then.

Further technical scheme can be: the core silk 9 of certain diameter is wrapped in the center of pug 12 automatically, continuously in the extrusion of ceramic material 12, becomes contact pin material 10, after material 10 oven dry, extract core silk 9 and promptly obtain central small hole.

Further technical scheme can also be: with lathe material 10 is carried out machining, behind cut-out, chamfering, processing guiding taper hole 19, obtain contact pin biscuit 18.1,18.2,18.3, at last biscuit 18.1,18.2,18.3 is carried out degreasing in high temperature sintering furnace and high temperature sintering obtains contact pin base pipe.Suggestion: degreasing under 200～500 ℃ of temperature earlier obtains ceramic contact pin base pipe in 1200-1550 ℃ of sintering temperature again.

And, core silk 9 circular cross-section filament, contact pin material 10 for adopting organic material to pull into after alignment and oven dry, process or sintering before, core silk 9 is extracted out.

The present invention also has the extruder head of a kind of ceramic contact pin base pipe moulding, it comprises die

body

1,4, die orifice 5 and stock mould 6 up and down, it is characterized in that: be provided with a core rod pipe holder 3 in the lower mold body 4, be distributed with pod apertures 14 around this support, other has a radial hole 17 to core rod pipe 15 and stock mould 6 guiding core silks 9, this aperture 17 is between pod apertures 14, and the outer wall of lower mold body 4 is provided with the adjustment screw 7 of regulating stock mould 6 radial positions.

Upper and

lower die body

1,4 can be made into one, but assembling for convenience, preferably upper and lower die body was opened in 1,4 minutes and the two is threaded.Described pod apertures 14 is preferably 6～8.

Described core silk 9 penetrates in the horizontal aperture 17 of the radial hole 17 of lower mold body 4 and core rod pipe holder 3, passes behind the typing hole through core rod pipe 15, die orifice 5 and stock mould 6.Be subjected to of the guiding of the pug 12 of piston 13 extruding through loading head 11 and branch flow cone 2, the conical cavity that pod apertures 14 around the core rod pipe holder 3 enters die orifice 5 converges and once more after the extruding, is being with core silk 9 to be extruded as contact pin material 10 automatically and continuously from stock mould 6 holes.After material 10 oven dry, extract core silk 9 and promptly form central small hole 20.

Further technical scheme can be: a little cone is arranged at the bottom of core rod pipe holder 3, stud with core rod pipe 15 in the cone, there are two sections taper holes the inside of die orifice 5, the cone angle of top taper hole is 40 °～50 °, the tapering of bottom taper hole is 1: 50～1: 20, be loading head 11 on the core rod pipe holder 3, divide flow cone 2 and piston 13, the typing hole of decision contact pin biscuit external diameter size is arranged in the stock mould 6, there is chamfering 16 lower end in typing hole.

This extruder head can also be made an individual components (see figure 3), can directly be assemblied in the extruder that contains piston 13 during use.

And corresponding stock mould 6 places are uniform-distribution with 3～4 adjustment screw 7 around lower mold body 4, and the afterbody of screw contacts with stock mould 6, and the gland 8 of restriction stock mould 6 axial locations is connected with the bottom of lower mold body 4.

Claims

1. a ceramic contact pin base pipe contains the core extruding forming method, it is characterized in that: extruding pug extrusion molding in containing the extruder of extruder head is the contact pin material that includes the core silk, material is after alignment and oven dry, extract the core silk and promptly obtain central small hole, again the contact pin material is carried out machining and makes it become the contact pin biscuit, obtain contact pin base pipe through degreasing and high temperature sintering then.

2. ceramic contact pin base pipe according to claim 1 contain the core extruding forming method, it is characterized in that: skimming temp is 200～500 ℃, sintering temperature is 1200-1550 ℃.

3. the extruder head of ceramic contact pin base pipe moulding, comprise die body, die orifice and stock mould up and down, it is characterized in that: be provided with a core rod pipe holder in the lower mold body, be distributed with pod apertures around this support, other has a radial hole to core rod pipe and stock mould guiding core silk, this aperture is between pod apertures, and the outer wall of lower mold body is provided with the adjustment screw of regulating the stock mould radial position.

4. the extruder head of ceramic contact pin base pipe according to claim 3 moulding, it is characterized in that: a little cone is arranged at the bottom of core rod pipe holder, stud with the core rod pipe in the cone, there are two sections taper holes the inside of die orifice, the cone angle of top taper hole is 40 °～50 °, and the tapering of bottom taper hole is 1: 50～1: 20, is loading head, branch flow cone and piston on the core rod pipe holder, the typing hole of decision contact pin biscuit external diameter size is arranged in the stock mould, and there is chamfering the lower end in typing hole.

5. according to the extruder head of claim 3 or 4 described ceramic contact pin base pipe moulding, it is characterized in that: corresponding stock mould place is uniform-distribution with 3～4 adjustment screw around lower mold body, the afterbody of screw contacts with stock mould, and the gland of restriction stock mould axial location is connected with the bottom of lower mold body.