How to Enhance the Gloss

사출 금형

Poor machining of the mold cavity—such as scratches, micro-pores, wear, and rough surfaces—will directly result in inferior gloss on the plastic parts. To solve this, carefully machine the mold to achieve a low surface roughness, and polish or chrome-plate the cavity if necessary.
Oil, water stains, or excessive release agent on the cavity surface can make the plastic surface dull and non-glossy. Clean away oil and water stains promptly, and use release agent in moderation.
An insufficient draft angle causes difficult demolding or excessive stress during ejection, impairing surface gloss. Increase the draft angle accordingly.
Poor mold venting traps excess gas inside the cavity, leading to poor gloss. Inspect and improve the mold venting system.
An excessively small or abruptly changing cross-section of the gate or runner creates high shear force and turbulent flow, reducing surface gloss. Properly enlarge the cross-sectional area of the gate and runner.

사출 성형[^1] Process

Low injection speed results in a non-dense surface and poor gloss. Appropriately increase the injection speed[^2].
Insufficient cooling for thick-walled parts causes a fuzzy, dull surface. Optimize the 냉각 시스템[^3].
Insufficient holding pressure and short holding time lead to low density and poor gloss. Raise the holding pressure and extend the holding time.
Low melt temperature reduces fluidity and causes poor gloss. Increase the melt temperature properly.
For parts made of crystalline resins such as PE, PP, POM, uneven cooling causes poor gloss. Improve the cooling system for uniform cooling.
Excessively high injection speed combined with an undersized gate creates a dull area near the gate. Reduce the injection speed and enlarge the gate cross-section.

결론

In summary, achieving superior gloss for injection molded products[^4] requires a balance between precise mold surface finishing and optimized injection molding parameters. By addressing issues like poor venting, insufficient cooling, and incorrect injection speed, manufacturers can significantly enhance product aesthetics and quality. This guide serves as a practical reference for solving common gloss problems in production.

[^1]: Explore this resource to discover essential techniques and insights that can enhance your injection molding process and product quality. [^2]: Learning about injection speed's effects can help optimize your processes for better product aesthetics. [^3]: Optimizing your cooling system is crucial for achieving uniform quality and gloss in injection molded products. [^4]: Explore this resource to discover expert techniques that enhance the quality and aesthetics of injection molded products.

저자 소개

Alex Yu

아이디얼 프로 매뉴팩처링

알렉스는 Ideal Pro의 공동 창립자이지만, 주요 프로젝트를 총괄하거나 기술 팀을 이끌지 않을 때는 장거리 자전거 타기를 즐기거나, 동네에서 가장 맛있는 커피를 찾아다니거나, 다음 여행 계획을 세우는 모습을 볼 수 있습니다. 국제 무역 영업과 프로젝트 관리 분야에서 20년 이상의 경력을 쌓아온 그는 촉박한 마감 기한부터 까다로운 엔지니어링 문제까지, 그 사이의 모든 상황을 다 겪어보았습니다. 그는 훌륭한 성과는 충분한 휴식을 취한 마음과 맛있는 커피에서 나온다고 믿으며, 맡은 모든 프로젝트에 그와 같은 호기심과 세심한 주의를 기울입니다. 사무실에 있지 않을 때는 대개 야외 어딘가에서 새로운 장소를 탐험하며, 나중에 나눌 이야기를 수집하곤 합니다.