通过改进浇注系统，特别是采取在进、排气道芯砂中添加特殊抗脉纹添加剂及在砂芯表面涂刷烧结型涂料等工艺，有效地预防和消除了脉纹缺陷。
Veining defects have been effectively prevented and eliminated by improvement on gating system, especially by special additive to core sand and sinter coating on surface of sand core.
通过该工艺生产的相机镜座等铸件消除了铸件表面冷隔、皱褶等缺陷，提高了铸件质量，满足了技术条件要求。
The defects of castings such as camera base have been eliminated through the process. The quality of the castings has been promoted. And it also satisfied the specification of the technical provision.
采用柔性垫层是抑制和消除多点模拉形过程中零件表面缺陷的重要措施。
Using flexible interpolator pad is an important way to suppress the part surface defect in stretch-forming process on multi-point tool.
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