CN106435438A - Manufacturing method of ceramic PTC surface electrodes - Google Patents
Manufacturing method of ceramic PTC surface electrodes Download PDFInfo
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- CN106435438A CN106435438A CN201510449678.2A CN201510449678A CN106435438A CN 106435438 A CN106435438 A CN 106435438A CN 201510449678 A CN201510449678 A CN 201510449678A CN 106435438 A CN106435438 A CN 106435438A
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- ptc
- ceramic
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- arc
- spray gun
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Abstract
The invention relates to a manufacturing method of ceramic PTC surface electrodes. The manufacturing method comprises the following steps of fixing an electric-arc spray gun, loading the electric-arc spray gun in an automatic front-rear swing system with adjustable vertical height and adjustable system swing frequency and arranging a conveying platform under the electric-arc spray gun, wherein a forward direction of the conveying table is vertical to the swing direction of the spray gun, the forward speed of the conveying table is adjustable, and a cover plate with an opening therein, a middle plate and a bottom plate are assembled into an opening mould; loading a formed ceramic PTC sheet in the opening mould, exposing the surface of a PTC basal body through the opening, putting the mould with the PTC ceramic onto the fixed conveying platform, taking two continuously fed electrode wires as a self-consumption electrode, generating electric arc on the end part of the self-consumption electrode as a heat source, and utilizing compressed air to spray molten electrode wire atomized slightly soluable drops to the surface of the ceramic sheet to form an electrode layer. According to the manufacturing method, electricity and compressed air are used, so that explosion possibility is removed, and use is safe; and a product manufactured by the manufacturing method is small in surface resistance, is resistant to ageing and is good in safety.
Description
Technical field
The present invention relates to a kind of manufacture method of ceramic-like PTC surface electrode.
Background technology
PTC-ceramic is a kind of Barium metatitanate. base class ceramic material, at uniform temperature point (referred to as " Curie temperature ")
Following resistance value is relatively small, and about hundreds of ohm is to several kilohms.Once reaching and exceeding Curie temperature, electricity
Resistance is increased dramatically several orders of magnitude, is therefore referred to as " critesistor " material.The components and parts of this material manufacture are extensive
For fields such as heater members, circuit overcurrent protections.And surface electrode forms ohm of no potential barrier with PTC-ceramic
Contact, thus by electrode process for PTC this semi-conducting material in heater members or circuit current-limiting protection
Application is particularly important.
Electric arc spraying is come fusing metal using the electric arc burning between two tinsels being continuously fed to, with height
Fast air-flow is atomized molten metal, and the metallic of atomization is accelerated make them spray to workpiece formation coating
Technology.Electric arc spraying is the most general in the practical application engineering such as steel structure anti-corrosion, the maintenance of wear-resistant and machine components
All over a kind of heat spraying method using.
Traditional PTC-ceramic chip electrode manufacturing process commonly uses silk material flame-spraying, i.e. acetylene-oxygen flame wire rod spray
Apply：Using oxygen, acetylene torch as heating thermal source wiry, so that wire ends is heated and reach molten state,
By means of compressed air, the silk material pyrosol of molten state is melted into microgranule, is ejected into the base material table through pretreatment
Face and form the figure layer of strong bonded.
But flame-spraying has weak point, oxygen, the storage of acetylene and transport, height in flame spraying process again
Temperature burning (acetylene flame temperature is about 3200 DEG C) all can cause potential safety hazard in the industrial production.Electric arc spraying is only
Practical electricity and compressed air, without oxygen, acetylene etc., do not have high-temp combustion process in spraying process yet, relatively
Much more secure；Electric arc spraying is not only very economical but also has its unique advantage on manufacturing ceramic PTC electrode again.
Content of the invention
The purpose of the present invention is for above-mentioned present situation, it is desirable to provide one kind can exclude explosion potential, using safety；
The product surface resistance made is little, the manufacture method of aging resistance and the good ceramic-like PTC surface electrode of safety.
The implementation of the object of the invention is, a kind of manufacture method of ceramic-like PTC surface electrode, concrete steps
As follows：
1) arc pistol is fixed on fixing transverse slat centre, and is loaded in automatization's swing system
In terminal, and spray gun vertical height, spray gun and connector hunting frequency are adjustable；
2) delivery platform, delivery platform direction of advance and arc pistol swing side are set immediately below arc pistol
To vertical, delivery platform pace is adjustable；
3) there are the cover plate of perforate and middle plate thereon, base plate screw tightens together becomes loading ceramic PTC
The opening die of piece；Described middle plate, the perforate of base plate and cover plate are same；
4) by forming ceramic PTC piece step 3) opening die load, perforate exposes ceramic-like PTC matrix
Surface, and the opening die being loaded with PTC-ceramic is positioned on delivery platform；
5) by the use of two wire electrodes being continuously fed to as consutrodes, produce electric arc as thermal source in its end, utilize
The wire electrode having melted atomization slightly soluble is dripped by compressed air, sprays to ceramic-like PTC with arc pistol with high speed
Matrix surface forms electrode layer, that is, produce ceramic-like PTC surface electrode；
Described arc voltage 20-44V, spray gun wire feed rate 8-20V, lance duct mouth are high away from PTC matrix surface
Delivery platform translational speed below degree 10-25mm, arc pistol swing speed 9-25Hz, arc pistol
10-15Hz.
The present invention, by the use of two wire electrodes being continuously fed to as consutrodes, produces electric arc as thermal source in its end；Profit
With compressed air, the wire electrode having melted is atomized, and ceramic-like PTC matrix surface is sprayed to high speed and form one
Layer surface electrode.Because the present invention uses electricity and compressed air, without acetylene with oxygen so as to safety carries
Height, eliminates the probability of blast.The ceramic-like PTC surface electrode electrical property made using the present invention and flame
Comparing of spraying has its unique advantage in terms of reducing sheet resistance, aging resistance and safety.
Brief description
Fig. 1 is the schematic diagram of invention；
Fig. 2 is the installation diagram of arc pistol；
Fig. 3 is the integral device structural representation of the present invention,
Fig. 4 is the covering plate structure schematic diagram of opening die,
Fig. 5 is opening die installation diagram.
Specific embodiment
The present invention is described in detail in detail with reference to the accompanying drawings.
With reference to Fig. 1, the present invention comprises the following steps that：
1) arc pistol 8 is fixed on (see Fig. 2) on fixing transverse slat, and is loaded in pendulum before and after automatization
In the terminal of dynamic system, and spray gun vertical height is adjustable, and spray gun and connecting member system hunting frequency are adjustable；
2) delivery platform, transfer station direction of advance and arc pistol 8 swaying direction are set immediately below arc pistol
Vertically, transfer station pace is adjustable；
3) cover plate 10 being had perforate 11 thereon tightens together and becomes loading with middle plate, base plate screw 12
The opening die of ceramic PTC piece；Described middle plate, the perforate of base plate and cover plate are same；
4) by forming ceramic PTC piece step 3) opening die load, perforate exposes PTC matrix surface,
And the mould being loaded with PTC-ceramic is positioned on fixing delivery platform 9.Opening die perforate is by ceramic PTC base
Body 5 surface exposes outside, to prevent the ceramic PTC matrix two lateral electrode short circuit of rectangular patch.
5) wire electrode is sent into by wire electrode to pipe 7, by the use of two wire electrodes being continuously fed to 3 as consutrodes, at it
End produces electric arc 1 as thermal source, and compressed air 2 is sent into by air-pressure duct 6, will be melted using compressed air
The wire electrode atomization slightly soluble changed drips 4, sprays to ceramic-like PTC matrix surface with arc pistol with high speed and is formed
Electrode layer, that is, produce ceramic-like PTC surface electrode.
In the automation spray painting apparatus of the present invention, arc voltage, spray gun wire feed rate, lance duct mouth are away from ceramic PTC
The Parameter adjustable such as delivery platform translational speed below matrix surface height, spray gun swing speed, spray gun, with
The electrode layer of this adjustment desired properties.Described arc voltage 20-44V, spray gun wire feed rate 8-20V, spray gun are led
Pipe 7 mouth of pipe away from ceramic-like PTC matrix surface height 10-25mm, arc pistol swing speed 9-25Hz,
Delivery platform translational speed 10-15Hz below arc pistol.
Described coating electrode silk is mainly zinc silk or aluminium wire.The electrode thickness that described ceramic-like PTC matrix surface is formed
0.05±0.01mm.Described ceramic PTC matrix profile, thickness are unrestricted.
The arc voltage of the present invention is divided into tri- gears of 20V, 26V, 44V, generally using two gears,
Wire feed voltage 20-40V, spray gun vertical height are 15mm, spray gun hunting frequency 8Hz, conveyer belt rotating speed are 10Hz,
Spraying effect is made to reach ceramic-like PTC surface electrode performance requirement.
The arc spraying aluminium electrode layer of the present invention and flame-spraying aluminium electrode layer are compared experiment, experimental project bag
Include tensile test and aging resistance test etc., electric arc spraying and flame-spraying tensile test Data Comparison the results are shown in Table 1.
Table 1
| EFI aluminum | Pulling force/N | Flame spurt Aluminium | Pulling force/N |
| 1 | 489.4 | 1 | 499.2 |
| 2 | 498.5 | 2 | 471.9 |
| 3 | 509.4 | 3 | 406 |
As seen from Table 1, the electrode adhesion of two kinds of spraying methods is more or less the same.
Table 2 is that electric arc spraying is shown in Table 2 with flame-spraying aging resistance test data comparing result.
Table 2
As seen from Table 2, electric arc spraying ceramic-like PTC chip and flame-spraying aging resistance experimental data, resistance becomes
Rate all below 10%, the two no significant difference.
Contrast experiment's explanation：Manufacture ceramic-like PTC electrode using the arc spraying technology of the present invention to compare and tradition
Flame-spraying has safe advantage, and electrode layer electrical property is not affected, using electric arc spraying manufacture
Pottery class porcelain PTC electrode is feasible.
Claims (3)
1. a kind of manufacture method of ceramic-like PTC surface electrode it is characterised in that：Comprise the following steps that：
1) arc pistol is fixed on fixing transverse slat centre, and is loaded in automatization's swing system
In terminal, and spray gun vertical height, spray gun and connector hunting frequency are adjustable；
2) delivery platform, delivery platform direction of advance and arc pistol swing side are set immediately below arc pistol
To vertical, delivery platform pace is adjustable；
3) there are the cover plate of perforate and middle plate thereon, base plate screw tightens together becomes loading ceramic PTC
The opening die of piece；Described middle plate, the perforate of base plate and cover plate are same；
4) by forming ceramic PTC piece step 3) opening die load, perforate exposes ceramic-like PTC matrix
Surface, and the opening die being loaded with PTC-ceramic is positioned on delivery platform；
5) by the use of two wire electrodes being continuously fed to as consutrodes, produce electric arc as thermal source in its end, utilize
The wire electrode having melted atomization slightly soluble is dripped by compressed air, sprays to ceramic-like PTC with arc pistol with high speed
Matrix surface forms electrode layer, that is, produce ceramic-like PTC surface electrode；
Described arc voltage 20-44V, spray gun wire feed rate 8-20V, lance duct mouth are away from ceramic-like PTC matrix
Below apparent height 10-25mm, arc pistol swing speed 9-25Hz, arc pistol, delivery platform moves
Speed 10-15Hz.
2. a kind of ceramic-like PTC surface electrode according to claim 1 manufacture method it is characterised in that：
Described coating electrode silk (3) is zinc silk or aluminium wire.
3. a kind of ceramic-like PTC surface electrode according to claim 1 manufacture method it is characterised in that：
Electrode thickness 0.05 ± 0.01mm that described ceramic-like PTC matrix surface is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449678.2A CN106435438A (en) | 2015-07-28 | 2015-07-28 | Manufacturing method of ceramic PTC surface electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449678.2A CN106435438A (en) | 2015-07-28 | 2015-07-28 | Manufacturing method of ceramic PTC surface electrodes |
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| Publication Number | Publication Date |
|---|---|
| CN106435438A true CN106435438A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510449678.2A Pending CN106435438A (en) | 2015-07-28 | 2015-07-28 | Manufacturing method of ceramic PTC surface electrodes |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437785A (en) * | 1999-12-28 | 2003-08-20 | 阿尔斯通公司 | Method for producing a high-quality insulation of electric conductors or conductor bundles of rotating electric machines by means of thermal spraying |
| EP1500638A1 (en) * | 2003-07-21 | 2005-01-26 | Abb Research Ltd. | Laser irradiated metallised electroceramic |
| CN103247362A (en) * | 2013-04-17 | 2013-08-14 | 隆科电子(惠阳)有限公司 | Base metal combined electrode of electronic ceramic part and preparation method of base metal combined electrode |
| CN103482982A (en) * | 2012-06-11 | 2014-01-01 | 镇江东方电热科技股份有限公司 | Method of improving voltage resistance performance of PTC ceramic element |
| CN104392816A (en) * | 2014-10-17 | 2015-03-04 | 汕头市鸿志电子有限公司 | Electric arc spraying process for inner electrode |
-
2015
- 2015-07-28 CN CN201510449678.2A patent/CN106435438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437785A (en) * | 1999-12-28 | 2003-08-20 | 阿尔斯通公司 | Method for producing a high-quality insulation of electric conductors or conductor bundles of rotating electric machines by means of thermal spraying |
| EP1500638A1 (en) * | 2003-07-21 | 2005-01-26 | Abb Research Ltd. | Laser irradiated metallised electroceramic |
| CN103482982A (en) * | 2012-06-11 | 2014-01-01 | 镇江东方电热科技股份有限公司 | Method of improving voltage resistance performance of PTC ceramic element |
| CN103247362A (en) * | 2013-04-17 | 2013-08-14 | 隆科电子(惠阳)有限公司 | Base metal combined electrode of electronic ceramic part and preparation method of base metal combined electrode |
| CN104392816A (en) * | 2014-10-17 | 2015-03-04 | 汕头市鸿志电子有限公司 | Electric arc spraying process for inner electrode |
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Application publication date: 20170222 |
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