A woven yarn guide assembly for coating composite electroplating layer and its making method

Abstract

The present invention provides a weaving yarn guide assembly for coating a composite electroplated layer having good abrasion resistance and thermal conductivity and a method for producing the same, and a method of manufacturing a composite yarn by electrochemically coating a surface of a woven yarn guide assembly of a textile machine Carbide ceramic plating layer, the composite metal carbide ceramic plating layer hardness of 750-950Hv, the friction coefficient of 0.45 or less and the thermal conductivity of 185W / (m * K) or more, can be applied to the need for high precision, high hardness, Low-friction and friction heat is not easy to accumulate the requirements of the weaving-oriented components such as healds, Shenke tablets, reed, stop sheet, or spinning needles and other components; the invention proposed the preparation of the composite metal carbide ceramic coating Electroplating method for yarn guide assembly.

Description

technical field [0001] The invention relates to the fields of chemical industry and textile equipment, in particular to a weaving guide assembly coated with a composite electroplating layer with good wear resistance and thermal conductivity and a manufacturing method thereof. Background technique [0002] Textile fibers such as cotton, rayon, polyester, polypropylene, polyamide, polyamide, wool, acrylic, elastic fiber or other elastic fibers, etc., must be woven into weaving (weaving) by using a textile machine. The weaving guide assembly is an important part of the textile machine, such as heald (heald, heddle, harness wire, guard wire, also known as heald, heddle, etc.), reed (heddle hook), sinker (sinker, also known as Known as sinker, etc.), reed (reed, loom reed, dentreed), menopause (dropper), spinning needle (knitting needle) and so on. The speed of the textile machine is high, generally above 600-1000 rpm, and the number of friction and impact of the weaving yarn on...

AI Technical Summary

Problems solved by technology

Although the surface hardness of electroplated hard chromium is harder than that of electroplated nickel layer, if it is specially treated, the hardness can reach 1000HV, but its existence uses Cr 6+ Due to the high stress of the electroplated hard chrome coating, it cannot withstand long-term repeated impact fatigue and stress corrosion, which will cause the electroplating chrome layer to break or wear, and instead cause easy-to-cut marks and burrs

European Patent EP0485633, U.S. Patent US5511587, and Chinese Patent Publication No. 201220262380.2 disclose the use of nickel sulfate electroplating baths to combine diamond-like (DLC), silicon carbide (SiC), aluminum oxide (Al 2 o 3 ), zirconia (ZrO 2 ), chromium oxide (Cr 2 o 3 ) and other wear-resistant particles and electroplated nickel are co-deposited on the special-shaped reed sheet or other weaving guide components, for example, the thickness is 5-20 μm, 1-10 μm, etc., reaching a surface hardness above 1000-2000HV and a surface friction coefficient below 0.14; For example, European patent EP0550752 discloses coating DLC ​​on titanium carbide or other carbides, oxides, and electroplated chromium to achieve high wear resistance. However, the alloy chemical composite layer of nanoparticles has poor adhesion and high production costs. problem, it is also difficult to popularize and use

[0005] Although in recent years, breakthroughs have been made in plastic materials, using plastic materials to replace metal plastic healds; plastic healds save material costs compared to metal healds, but it is difficult to solve the problem of wear resistance. Chinese Patent Publication No. CN201228305 is disclosed in Plastic Healds The part of the heald eye is made of ceramic heald eye, which can reduce the friction coefficient between the warp yarn and the warp yarn by using the smooth and high wear resistance of the ceramic; The weaving guide component of the yarn is difficult to implement in terms of mass production or cost

When weaving high-strength textile fibers with plastic healds or plastic yarn guide components, there are still problems such as short service life, frequent shutdowns and replacements, poor weaving quality, and the difficulty of recycling waste plastic healds, causing huge damage to the environment, etc.

[0006] Chromium metal materials, chromium-cobalt-molybdenum alloy materials, chromium-cobalt alloy materials, and chrome-iron alloy materials generally have good comprehensive mechanical properties, high hardness, strong wear resistance, high temperature resistance, and corrosion resistance. They can be used in harsh industrial environments, China Patent CN103060617 A discloses high-temperature alloy forging technology, but this kind of material generally has the characteristics of poor toughness and easy embrittlement, and it will be more expensive to directly use this kind of material to make the weaving guide assembly

If plasma-assisted chemical deposition, vapor deposition (CVD), high-energy micro-arc technology, high-temperature carbonization, low-temperature carbonization, physical vapor deposition (PVD), the sputtering method or vapor deposition method of US Patent No. 4925394, and the diffusion of EP1878943 Chromium method, Taiwan Patent Publication No. TW201101565 using powder bath method, Taiwan Patent TWI297365 and other prior technologies, disclosed that chromium carbide powder material can be used to convert chromium metal, chromium-cobalt-molybdenum alloy to tools in the aforementioned manner (commonly known as dry method). , chrome-cobalt alloy, chrome-iron alloy and other alloy materials are coated on the heald, although it can overcome the characteristics of poor toughness and easy embrittlement, it cannot solve the problems of high manufacturing cost and difficulty in mass production

[0007] Metallized ceramics (metallic ceramic) is a ceramic-like structure co-construct formed by doping non-metallic elements with metal elements, so that it has both metal and ceramic properties. For example, some co-constructs It has the hardness and good corrosion resistance of ordinary ceramics, or has both metallic luster and conductivity, or has both the color and luster of ceramics; Taiwan patents TWI441954, TWI441961, TWI533526 and Chinese patent CN103726091 use electroplating methods (commonly known as Wet method) forms a metallized ceramic layer of chromium carbide on the substrate. This metallized ceramic layer has hydrophobicity and good electrical conductivity. If you want to increase the hardness, you need to use high temperature baking or burning with flame; The components are light and thin, and cannot be baked at high temperature or burnt with flames to increase the hardness of the electroplating layer, otherwise the thin yarn guide components will lose their mechanical properties or warp, and the above-mentioned products have poor surface flatness and a large friction coefficient. Thin and soft weaving yarns will still have yarn scraping and cannot be used for weaving yarn guide components

[0008] In summary, the above-mentioned technologies have certain defects in solving high hardness, high hydrophobicity, anti-sticking, high conductivity, etc., and it is impossible to obtain high hardness, wear resistance, low friction, and heat conduction by using these technologies. The electroplated metallized ceramic layer with high coefficient to avoid heat accumulation is applied to the weaving guide assembly. Therefore, it is necessary to develop newer technologies and propose effective and specific improvement solutions

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