Luoyang Gefei Co.,Ltd.

youbo 发表于 2008-11-14 16:56:17

Luoyang Gefei Co., Ltd. was founded in 1989, is a high-tech enterprise. There are over 168 faculty members, 45% among whom are technological staffs.SiC heating elements

We are the leading manufacturer in non-ferrous metal industries in China.
The main products of our plant are as follows:

        Molybdenum products

All the molybdenum products meet to ASTM386 and ASTM387. It including molybdenum plates and molybdenum sheets, molybdenum rods and molybdenum bars, molybdenum crucibles and molybdenum boats, molybdenum targets and so on.

        Tungsten products

All the tungsten products meet to ASTM B760 and ASTM B761. It including tungsten plates and tungsten sheets, tungsten rods and tungsten bars, tungsten crucibles and tungsten boats, tungsten targets and so on.

        MoSi2 heating elements(used in the furance of 1300℃ to 1800℃ )
        SiC heating elements(used in the furance of 600℃ to 1600℃)
It is wildly used in the industries of metallurgy, glass, ceramic refractory, crystal electronic device, industrial furnace manufacture, etc.

        Tungsten carbide products

A very good material with high hardness, melting point and wear resistance. Some people describe it as “the teeth of manufacturing”. It is widely used in the mining, petroleum, machining and steel industry.

       Copper tungsten products

This metal composites have high physical and mechanical properties, as well as high thermal and electrical conductivity. We supply rods, plate, ring and abnormal pieces.

        Furnaces (tube furnace and box furnace)

In the past years, we send our products to all over the world, such as America, Europe, Japan,  South Korea, Taiwan and etc. We have an excellent reputation in the world.

http://www.sicheatingelements.cn
We can assure you that the products we supplied will be in the high quality and competitive. Please trust me. To cooperate with us will be your best choice.

SiC heating elements

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SiC heating elementsSiC heating elementsSiC heating elements

 

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Selecting the Right Elements

youbo 发表于 2008-11-14 16:56:17

The number of options within a given sic heating elements class is ever increasing, and the overlap in the range of application of the classes is growing as well. The information and guidelines presented here are intended to be sufficient to narrow the range of sic heating elements options for a specific application and/or to enable a general assessment of the validity of a proposed solution. However, the detailed specification and design of electric sic heating elements is best left to either a highly-qualified electric furnace/kiln builder, an experienced and unbiased electric heating system consultant, or a full-range electric sic heating elements supplier who has no bias toward a particular class of element. http://www.sicheatingelements.cn/

SiC Heating Elements at a Glance

Metallic Elements

Advantages:

  • Available in wire and strip form, so they can be formed and fabricated by conventional metal-forming techniques into a variety of shapes and sizes
  • Heating systems employing them can be designed to operate on line voltage, while systems using SiC and MoSi2 elements generally require transformers
  • Typically less expensive than SiC and MoSi2 sic heating elements for the same power output

Disadvantages:

  • Relatively low MET
  • Not self-supporting
  • Resistance increases with time due to reduction in cross-section by oxidation and elongation (creep), resulting in decreased power output and eventual failure

Silicon Carbide Elements

Advantages:

  • Available in a wide range of shapes and sizes
  • Self-supportingthey can be used in furnaces that are too wide or too long to be spanned by metallic or MoSi2 sic heating elements
  • Capable of higher operating temperatures and higher watt loadings than metallic elements
  • Relatively easy to change while the furnace is hot

Disadvantages:

  • More costly power control equipment than for metallic elements (multi-tap transformer required)
  • Electrical resistance increases with time (aging), meaning more maintenance attention (transformer tap changing and group replacement) is required than for metallic or MoSi2 elements
  • Ceramic materialrisk of fracture

Molybdenum Disilicide Elements

Advantages:

  • Available in a variety of shapes and sizes
  • Highest operating temperatures and watt loadings of the elements under http://www.sicheatingelements.cn/
  • consideration
  • Stable resistancenew and old elements can be connected in series
  • Fast thermal cycling possible without element degradation
  • Relatively easy to change while the furnace is hot
  • Longest inherent life of all electric sic heating elements

Disadvantages:

  • More costly power control equipment than for metallic elements (low voltage/high startup current, transformer required)
  • Most expensive of the elements under consideration
  • Ceramic materialrisk of fracture
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对于安全套广告灯箱走进嘉兴社区异议

youbo 发表于 2008-11-14 16:56:17

近日，一只只安全套广告灯箱打破了嘉兴一些小区往日的宁静。具有性暗示意味的安全套广告摆在了家门口，让小区居民议论纷纷。

　　在嘉兴阳光小区，记者见到了成为众人焦点的安全套广告灯箱。它外形美观，较为大气。正面写着：“全民动员、遏制艾滋”、“相互关爱、共享生命”的广告语和某品牌安全套广告的宣传画。总体而言，这是一则公益性广告。

　　时近傍晚，在灯箱的映衬下，安全套广告灯箱显得引人注目。记者发现，一些年纪大的市民，路过灯箱时总是移开视线。而带着小孩的家长，往往加快脚步，催促孩子快走。可还是有小孩指着灯箱上的安全套，问父母：“这是什么？”尴尬的场景时有发生。

　　居民宋子元一脸不快地对记者说：“只要你一出家门，不管乐不乐意，每天都会看到。且不说给小孩造成不好的影响，就是成年人看这个广告也挺尴尬的。”

　　很多中年男性市民认同这个观点。他们说，其实，安全套广告灯箱本身并没有什么不好，但是和我们国家内敛、含蓄的文化不相容。亚都社区的边浩认为：作为一种性生活用品，安全套的宣传应该有一定的隐蔽性，不能如此“张扬”。他说，安全套广告灯箱摆进社区前，应该先考虑目前群众的接受程度。

　　记者了解到，这几天已经有市民联合起来，向社区“告状”，强烈要求撤下“刺眼”的安全套广告灯箱。但是，一些社区干部却觉得安全套广告灯箱进社区，“没什么不好啊！”

　　阳光小区的一名社区干部对记者说：“这也是一种性教育……这类广告告诉人们，尤其是一些年轻人如何‘保护自己’。”

　　有意思的是，年轻人并不反感，并很快接受了这个新事物。王安里社区的小张当天就在灯箱里买了安全套。他说：“时代在进步，我们不能用老眼光来看待文明事物，安全套广告灯箱进社区，象征着社会在对待性问题的文明开放程度。”

　　嘉兴市疾控中心艾滋病性病防治科主任徐文贤告诉记者，“推广公益性安全套广告灯箱的目的，是期待全社会对性健康的关心与重视。”

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做礼品盒应如何选择开槽机？

youbo 发表于 2008-11-14 16:55:49

目前，纸箱生产企业的纸箱印刷普遍采用水性印刷开槽机，使得水性印刷开槽机市场得以迅猛发展。大中小纸箱生产企业对设备的需求，是由生产的产品、企业规模和经济实力决定的。大型企业由于对产品印刷质量要求高、批量大、规格多，经济实力强，一般使用高档水性印刷开槽机；而中小型纸箱生产企业产品比较单一，批量较小，对印刷质量要求不高，一色、二色即可，通常使用中低档水性印刷开槽机。所以，生产包装印刷机械的企业必须分别对待，既要满足大型企业生产高档纸箱产品的需求，又要满足中小企业生产中低档纸箱产品的要求，做到高、中、低档产品全面发展。
以中低档产品满足中小纸箱企业　http://www.86jg.com/kaicaoji.html
　　
　　中小企业大部分是三级厂，以购买纸板生产纸箱为主。由于产品单一，批量小、色彩少，一般购买单色、双色水性印刷开槽机或不带开槽的印刷机。传动方法是手动链条或电动链条机，价格较低，能适应产品结构和经济实力。有的企业购买三色水性印刷开槽机，还是选择手动或电动机。虽然校版较慢、车速较慢，但客户对产品质量要求不高，所以这种产品比较符合三级厂实际生产情况。
　　
　 我国三级厂占纸箱生产企业约80％以上。中低档水性印刷开槽机的增加或更换速度很快，市场销售量很大。包装机械生产企业不能因为价格低、利润薄而放弃生产低档机，必须满足中小纸箱企业的需求。


以高档产品满足大型企业

　　大型纸箱生产企业年销售额在1亿元以上，企业规模大，产品结构复杂，产品品种、规格多，批量大，质量要求高。其客户大多数是国内知名生产企业，这些客户需要的是受消费者欢迎的高档纸箱。使用高速、高精度、全自动水性印刷开槽机或水性印刷模切机，达到套色准确、色彩鲜艳、真实感强、网线美观，才能使产品与包装箱相匹配。
　
　　一些包装机械生产企业努力提高技术含量，近年来学习国外先进技术，研发高档、高速、高精全自动水性印刷开槽机，如上海鼎龙、朝昌、今昌、青云，广东东方，湖北京山，陕西北人印机等企业。这些企业生产的产品大部分部件都从先进国家进口，在国内经过精加工，形成整机，因而价格较高，一般在150万一300万元不等，适合经济实力较强的大型纸箱生产企业购买。　http://www.86jg.com/kaicaoji.html　

　　我国大型纸箱生产企业只占整个行业的5％左右，我国水性印刷开槽机的科技水平和技术含量虽然与国际先进水平还存在着较大差距，但距离正在缩小，预计再花5年左右的时间将赶上国际水平。

　　　 水性印刷开槽机的发展趋势

　　目前，国际先进国家如美国、日本、法国、意大利、德国等纸箱生产实现了两条龙工艺，而我国只实现了一条龙工艺。如瓦楞纸板生产线只是把原来比较落后的几道工艺合并为瓦楞纸板生产线一条龙生产工艺，基本上实现合并后连续化生产。纸板质量有所提高，消灭了老工艺生产局面，瓦楞纸板生产线前道工序的生产，基本全面实现机械化。但后道工序仍然分为印刷、开槽、分切、钉箱、打包几道工序，水性印刷开槽机解决了印刷、开槽http://www.86jg.com/kaicaoji.html，而分切、模切、钉箱、打包仍然分开。所以后道工序是今后发展的重点，它的发展趋势是实现印刷、模切、粘箱、捆扎一条龙生产工艺，实现自动化、连续化。后道-条龙我国还没有开发，基本上依靠进口，目前上海从日本、韩国进口。
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