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点胶机厂家:怎样解决点胶机磁芯断裂问题?

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Author:久巨自动化Source:久巨业务部

问题:怎样解决点胶机磁芯断裂问题?产品点上胶在做循环的时候磁芯总是断裂是怎么回事,试过很多厂家的磁芯还是断裂,是胶的问题还是磁芯的问题?


DD-3主图-1.jpg


以下是久巨自动化技术人员的回答,希望对你有所帮助!


回答1最好讲清楚点胶在哪个位置,断裂在哪里。一般来说,磁芯点胶后断裂,如果是胶的原因,就出现在中柱点胶,而且点的是硬胶,将磁芯中柱拉裂了。如果中柱没点胶,或者点的是软胶还断裂,磁芯就有比较大的嫌疑!烘烤的温度过高,建议调低烤箱温度.胶水应该也有问题的,可以做个实验。同一种胶水点相同的胶量,点在不同厂商的铁芯上,在同等温度下烘烤同样长的时间,限出后查看断裂情况。如果都破,就与铁芯无关,反之与铁芯有关。胶烘烤后收缩的表面张力,烘烤温度,冷却方式(尽量不要一出烤箱就用大排风扇去快速冷却),铁芯材质等直接影响这个问题。


回答2磁芯在用点胶机点完胶以后,固化过程中会产生体积收缩,从而在磁芯中产生残余应力。当残余应力比较大时,特别是在磁芯的应力集中处(如根部和拐角处等)容易产生裂纹并发生断裂。因此磁芯发生损坏的原因既和磁芯有关也和胶水有关。一般的解决办法有:
1. 使用低应力胶水;
2. 优化胶水固化工艺,降低升温速度,减小固化应力;
3. 增大磁芯的力学强度;
4. 优化磁芯的形状,尤其是减小磁芯在压制过程中的应力集中,把拐角尽量做成圆弧形。


回答3注意控制点胶量的多少,减慢老化速度和降低老化温度,会改善!


回答4铁氧体材料是一种陶瓷材料,它的导热性和抗折性均不如金属材料。热胀冷缩时容易在磁体内部产生应力,特别是磁芯点胶之后。由于磁芯合胶体的热膨胀系数不一致,导致磁芯在进行高低温循环时膨胀和收缩不一致。从而在磁体内部产生应力。如果这种应力达到磁芯的抗折弯强度的极限时就会导致磁芯破裂。选择膨胀系数和磁芯相近的胶水!延长胶水的固化时间,减少胶水固化而产生的应力!

以上就是回答了,解决你的困惑了吗?在使用点胶机进行点胶的过程中一定要注意这些问题。


圆形精密型点胶机DD3-详情-为什么需要久巨自动化.jpg


久巨自动化让工业制造更美好!


长按“识别图中二维码”关注更多点胶机、充磁机、自动化资讯!

以技术为基石,以客户为中心!做进口设备的替代者!


Article classification: 点胶类问题
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Shenzhen hangshaC Shenzhen Jiujuok Industrial Equipment co., Ltd. (www.jiujuok.com) is  National High-tech Enterprise integrating R&D, manufacturing, and sales of the Dispensing equipmentMagnetization euipment, and Industrial Robot . Over the years, the company has been committed to product research and development and innovation, and has established long-term cooperative relations with a number of universities in China, such as Changsha university of science and technology.Obtained a number of national technology patents and passed "national authoritative testing, quality qualified products" firmly, won "China's independent innovation products" and other honors.The products are widely used in electronics (loudspeaker, mobile phone, computer), automobile, optical device, plastic products and other industries, and are widely favored by the market. Learn More


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