The invention belongs to the technical field of casting coating, in particular to a low-pressure sand core coating and a preparation method thereof. The invention dispenses white mud, talc powder, graphite, water and oil in a fixed proportion, and then mixes them evenly to give full play to the characteristics of the raw materials, and enhances the integrity of the paint through white mud; seals the gap between sand grains by talc powder, improves the overall strength of the paint; enhances the dry strength of the paint through oil; enhances the coring effect of the paint by graphite powder, and also enhances the coring effect of each raw material. A low pressure sand core coating was obtained by combining the properties. After using the low-pressure sand core coating of the invention, the pouring parameters and process difficulty can be reduced, the trial production period of the casting can be shortened, the surface quality of the casting can be improved, the polishing quantity of the later process can be reduced, the cost is lower than the existing low-pressure casting coating, the adhesion ability is stronger, and the dust is not easy to fall off during core cleaning.
【技术实现步骤摘要】
一种低压砂芯涂料及其制备方法
本专利技术属于铸造涂料
,尤其涉及一种低压砂芯涂料及其制备方法。
技术介绍
低压铸造是将液态合金在压力作用下由下而上压入铸型型腔,并在压力作用下凝固获得铸件的铸造方法。低压铸造常用于生产铝合金铸件,其产品具有精度高、内部质量好的优点,金属利用率可以在90%以上,并易实现机械化和自动化,与传统的铸造方法相比有明显优势。低压浇注过程需要对铸件进行加压,而形成芯子的砂与砂之间存在间隙,在加压过程中铝液会在压力下进入型芯间隙中,造成铸件表面不同程度的物理粘砂。减小压力或延长结壳时间,铸件内部会出现缩孔疏松缺陷。因此,铸件质量优劣与否,低压铸造用涂料是其关键技术之一,直接影响铸件表面质量和尺寸精度。涂刷在低压铸造模具表面的涂料可以改善模具的表面耐热性、化学稳定性、抗金属液冲刷性能,同时使涂层与铸件顺利剥离,来减少铸件的清理工作量。因此,寻找一种喷涂后提高能砂芯的耐火度和表面致密度,保证铸件内部冶金和表面质量合格的低压砂芯涂料是当务之急。
技术实现思路
为了解决现有技术中存在的上述技术问题,本专利技术提供一种低压砂芯涂料及其制备方法,具体是通过 ...
【技术保护点】
1.一种低压砂芯涂料,其特征在于,由下列重量份原料制备而成:白泥4‑6份、滑石粉8‑12份、石墨1.5‑2.5份、水17‑23份、机油1‑4份。
【技术特征摘要】
1.一种低压砂芯涂料,其特征在于,由下列重量份原料制备而成:白泥4-6份、滑石粉8-12份、石墨1.5-2.5份、水17-23份、机油1-4份。2.根据权利要求1所述的低压砂芯涂料,其特征在于,由下列重量份原料制备而成:白泥5份、滑石粉10份、石墨2份、水20份、机油3份。3.根据权利要求1所述的低压砂芯涂料,其特征在于,所述白泥,是细度2μm通过率为98%的白泥。4.根据权利要求1所述的低压砂芯涂料,其特征在于,所述滑石粉,是细度45μm通过率为98%的滑石粉。5.根据权利要求1所述的低压砂芯涂料,其特征在于,所述石墨,是细度200-10000的石墨粉。6.制备权利要求1-5中任一项所述低压砂芯涂料的制备方法,其特征在于,包括以下步骤:(1)按照重量份称...
【专利技术属性】
技术研发人员:安进华,张艳波,赵佩剑,杨晓瑜,胡卫北,
申请(专利权)人:贵州安吉航空精密铸造有限责任公司,
类型:发明
国别省市:贵州,52
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。