CN113319257A - Forming method for directly melting glass-coated noble metal microwire - Google Patents
Forming method for directly melting glass-coated noble metal microwire Download PDFInfo
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- CN113319257A CN113319257A CN202110701469.8A CN202110701469A CN113319257A CN 113319257 A CN113319257 A CN 113319257A CN 202110701469 A CN202110701469 A CN 202110701469A CN 113319257 A CN113319257 A CN 113319257A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0401—Moulds provided with a feed head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
A glass-coated noble metal microwire direct melting forming method, the outer diameter of the glass-coated copper ultramicro wire is 0.005-0.05 mm, the material of the coating layer is glass, the thickness of the glass coating layer is not less than 0.002mm and not more than 0.01 mm; the core wire is made of silver and silver alloy, or gold alloy. Glass and core wire metal are respectively heated into liquid in a glass melting crucible and a metal melting tube, two ends of the metal melting tube are opened, one end of the metal melting tube extends into the lower part of the molten glass, the glass melting crucible and a template are provided with continuous through holes, molten metal and molten glass are led out from the continuous through holes, and then cooling and composite forming are carried out on the microfilaments; the heating temperature of the molten glass is higher than the melting point of the core layer metal by 100-200 ℃, the relative pressure of the liquid surface of the molten glass is 0-0.05MPa, and the relative pressure of the metal liquid surface of the metal melting pipe is 0-0.06 MPa; the linear speed of the filament collecting device for collecting filaments is 0.2-5m/s, and the cooling mechanism adopts an air cooling or water mist cooling mode.
Description
Technical Field
The invention relates to a production device of metal microwires, in particular to a forming method for directly melting glass-coated noble metal microwires.
Background
With the development of the electronic and electrical industry, higher and higher requirements are put on some silver and gold noble metal wires, such as: small diameter, high strength, high corrosion resistance, high temperature resistance, high radiation resistance, high insulating property and the like. At present, the processing method of the silver and gold noble metal microwires mainly adopts a plastic processing mode of water tank drawing, and the method is restricted by characteristics of cold processing and deformation modes and is difficult to prepare the metal microwires with the diameter of several micrometers. In recent years, glass coated metal microfilaments are prepared by adopting an induction melting glass tube and a built-in metal block and spinning, although the production of microfilaments with micron-level diameters can be realized, the requirements on matching of the properties of magnetic field characteristics, physical property states of glass and the weight of the metal block are high, because the quality of the metal block is continuously reduced and the heating part of the glass tube is deformed due to the influence of the gravity of a molten pool, a system is always in a metastable state, the molten pool of the metal block is easy to drop, the stability of microfilament production is poor, the size fluctuation of the external diameter and the diameter of a core wire is large, and the requirements of the microelectronic industry on the diameter and the performance of a noble metal microfilament are difficult to meet.
Disclosure of Invention
Aiming at the defects of preparing metal microfilaments by a drawing method and a melt spinning method, the invention provides a technical scheme of a forming method for directly melting glass-coated noble metal microfilaments.
The technical principle of the method for directly melting and forming the glass-coated noble metal microwire is that a coated glass and a core layer noble metal are respectively melted in a glass melting crucible and a metal melting tube, the metal melting tube is a variable cross-section tube with openings at two ends, the small-opening end of the metal melting tube is arranged in the molten glass, the wall of the glass melting crucible is provided with a conical through hole, a template with micropores is arranged on the outer side of the conical hole of the glass melting crucible, the tip of the small-opening end of the metal melting tube extends into the conical through hole of the glass melting crucible, then certain pressure is respectively applied to the liquid level of the noble metal and the liquid level of the molten glass, then a wire drawing device is adopted to draw out the molten glass and the noble metal liquid from a template die hole, the molten glass and the noble metal microwire liquid are compounded in the die hole of the template, cooled by a cooling mechanism, and the wire collecting device is formed into a glass-coated noble metal microwire reel.
The cross section structure of the glass-coated noble metal micro-wire consists of a glass coating layer and a core wire noble metal, the outer diameter of the glass-coated copper ultra-micro-wire is 0.005-0.05 mm, the material of the coating layer is glass, and the thickness of the glass coating layer is not less than 0.002mm and not more than 0.01 mm.
The core wire noble metal is made of silver and silver alloy, or gold alloy;
the wire drawing device adopts a glass rod, and the diameter of the tip of the glass rod is not more than the outer diameter of the produced glass-coated noble metal microwire;
further, the transition temperature of the glass is 50-150 ℃ lower than the melting point of the noble metal of the core layer;
the metal melting tube extending into the tip of the glass melting bath in the figure 1 is of a conical structure, the difference value between the conical vertex angle of the tip of the metal melting tube and the vertex angle of the conical hole of the glass melting crucible is +/-1 degree, the inner diameter of the hole at the small opening end of the metal melting tube is not more than 1mm, the depth of the tip of the metal melting tube extending into the conical hole of the glass melting crucible is not less than 2mm, and the annular single-side gap between the conical shape of the tip of the metal melting tube and the conical hole of the glass melting crucible is 0.5-1 mm; the height of the microwire forming micropores of the template is 0.5-1 mm.
Further, the heating temperature of the molten glass is higher than the melting point of the core layer metal by 100-200 ℃, the relative pressure of the liquid surface of the molten glass is 0-0.05MPa, and the relative pressure of the metal liquid surface of the metal melting pipe is 0-0.06 MPa; the linear speed of the filament collecting device for collecting filaments is 0.2-5m/s, and the cooling mechanism adopts an air cooling or water mist cooling mode.
The invention has the advantages that:
1) compared with a melt spinning method, the influence of metal falling caused by suspension force change is not required to be considered, the stability of a molten pool is high, the diameter of the microfilament is controlled by adopting the template micropores, and the diameter is constant; compared with drawing method, the diameter of the produced microfilament is small, the working procedure is shorter, the broken wire rate is low, the die loss is low, and the production cost is low.
2) The production efficiency is improved, the quality of the molten metal is strictly limited due to the limitation of the suspension force in the melt spinning method, and continuous production cannot be realized.
3) The side face of the mould is provided with the mould plate, so that the drawing operation is more convenient.
4) By additionally arranging the template micropores, the metal melting pipe, the wire collecting device and the cooling mechanism, the simultaneous production of multiple wires can be conveniently realized.
Drawings
FIG. 1 is a schematic representation of the forming process principle of the present invention. In the figure, (1) is a glass melting crucible; (2) the heating system comprises a heating element and an accessory; (3) is molten glass; (4) is molten glass; (5) the metal melting pipe is a variable cross-section bent pipe with openings at two ends; (6) a glass melting crucible; (7) a ball valve or a gate valve is adopted as a stop valve; (8) is a connecting joint 2; (9) the system is a constant pressure system, the working pressure range of the system is 0-0.1MPa relative pressure, and the pressure of the metal liquid level and the pressure of the molten glass liquid level are respectively and independently controlled; (10) is a flexible tube; (11) the micro-holes are used as templates and are processed by laser; (12) glass-coated metal ultramicro-wires; (13) the wire winding mechanism is realized by driving a wire winding reel by a motor, the wire winding device is arranged below the template, the wire winding reel can move repeatedly in one direction, and the moving direction of the wire winding reel is vertical to the axial direction of the template die hole; (14) the cooling mechanism is realized in an air cooling or water mist cooling mode and is arranged below the side of the die hole of the template.
Detailed Description
EXAMPLE 1 glass-coated silver ultramicrofilament Forming Process
The outer diameter of the glass-coated silver superfine wire is 0.15 mm, the coating layer is made of glass, the thickness of the glass coating layer is 0.004mm, and the core wire is made of industrial pure silver.
The difference value between the conical vertex angle of the tip end of the metal melting tube and the vertex angle of the conical hole of the glass melting crucible is +/-0.2 degrees, the inner diameter of the hole of the tip end of the metal melting tube is 0.5 mm, the depth of the tip end of the metal melting tube extending into the conical hole of the glass melting crucible is not less than 3 mm, and the annular single-side gap between the conical shape of the tip end of the metal melting tube and the conical hole of the glass melting crucible is 1 mm. The transition temperature of the glass is 50-80 ℃ lower than the melting point of the metal of the copper layer of the core wire; the heating temperature of the molten glass is higher than the melting point of the core layer metal by 100-150 ℃, the working pressure of the glass liquid surface of the glass melting crucible is 0.04-0.05MPa, the pressure of the metal liquid surface in the metal liquid melting tube is 0.04-0.06 MPa, and the metal liquid surface is protected by nitrogen; the linear speed of the filament collecting device is 0.2-0.8 m/s, and the cooling mechanism adopts an air cooling mode.
EXAMPLE 2 glass-coated gold-copper alloy ultra-fine wire Forming Process
The outer diameter of the glass-coated gold-copper alloy ultramicro wire is 0.01mm, the coating layer is made of glass, the thickness of the glass coating layer is 0.002mm, and the core wire is made of gold-copper alloy;
the difference value between the conical vertex angle of the tip end of the metal melting tube and the vertex angle of the conical hole of the glass melting crucible is +/-0.2 degrees, the inner diameter of the hole of the tip end of the metal melting tube is 0.5 mm, the depth of the tip end of the metal melting tube extending into the conical hole of the glass melting crucible is not less than 3 mm, and the annular single-side gap between the conical shape of the tip end of the metal melting tube and the conical hole of the glass melting crucible is 1 mm. The transition temperature of the glass is 50-100 ℃ lower than the melting point of the metal of the core wire; the heating temperature of the molten glass is higher than the melting point of the core layer metal by 100-150 ℃, the working pressure of the glass liquid surface of the glass melting crucible is 0 MPa relative pressure, the pressure of the metal liquid surface in the metal liquid melting tube is 0.005-0.008MPa relative pressure, and the metal liquid surface is protected by nitrogen; the linear speed of the filament collecting device is 0.2-0.8 m/s, and the cooling mechanism adopts an air cooling mode.
Claims (3)
1. A glass-coated noble metal microfilament direct fusion forming method, the section structure of the glass-coated noble metal microfilament consists of a glass coating layer and a core wire noble metal, the outer diameter of the glass-coated copper microfilament is 0.005-0.05 mm, the material of the coating layer is glass, and the thickness of the glass coating layer is not less than 0.002mm and not more than 0.01 mm;
furthermore, the material of the noble metal of the core wire is silver and silver alloy, or gold alloy;
further, the transition temperature of the glass is 50-150 ℃ lower than the melting point of the noble metal of the core layer;
the method is characterized in that glass and core wire metal are respectively heated into liquid in a glass melting crucible and a metal melting tube, two ends of the metal melting tube are opened, one end of the metal melting tube extends into the lower part of the molten glass, continuous through holes are arranged in the glass melting crucible and a template, and molten metal and molten glass are led out from the continuous through holes, cooled and compositely formed into microfilaments;
the technological parameters of the forming method are that the heating temperature of the molten glass is higher than the melting point of the core layer metal by 100-200 ℃, the relative pressure of the liquid surface of the molten glass is 0-0.05MPa, and the relative pressure of the metal liquid surface of the metal melting pipe is 0-0.06 MPa; the linear speed of the filament collecting device for collecting filaments is 0.2-5m/s, and the cooling mechanism adopts an air cooling or water mist cooling mode.
2. The metal melting tube as set forth in claim 1, wherein the metal melting tube has a tapered configuration extending into the tip of the glass melting bath, the difference between the apex angle of the taper at the tip of the metal melting tube and the apex angle of the tapered hole of the glass melting crucible is ± 1 °, the inner diameter of the hole at the small opening end of the metal melting tube is not more than 1mm, the depth of the tip of the metal melting tube extending into the tapered hole of the glass melting crucible is not less than 2mm, and the annular one-sided gap between the taper at the tip of the metal melting tube and the tapered hole of the glass melting crucible is 0.5 to 1 mm.
3. The template of claim 1, wherein the template has a microwire forming microwell height of 0.5-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110701469.8A CN113319257A (en) | 2021-06-24 | 2021-06-24 | Forming method for directly melting glass-coated noble metal microwire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110701469.8A CN113319257A (en) | 2021-06-24 | 2021-06-24 | Forming method for directly melting glass-coated noble metal microwire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113319257A true CN113319257A (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110701469.8A Withdrawn CN113319257A (en) | 2021-06-24 | 2021-06-24 | Forming method for directly melting glass-coated noble metal microwire |
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| Country | Link |
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| CN (1) | CN113319257A (en) |
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2021
- 2021-06-24 CN CN202110701469.8A patent/CN113319257A/en not_active Withdrawn
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Application publication date: 20210831 |
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