一二三四在线观看免费视频-成人免费无码大片a毛片软件-国产又色又爽又黄刺激视频-久久久久88色偷偷

Technical document

ABS material injection molding products how to increase brightness?

2024-11-27 15:12:02 ABS material

1. High - Gloss ABS Raw Material Selection

Principle: ABS raw materials from different manufacturers vary in performance. Those designed for high - gloss products have optimized rubber - to - plastic phase ratios and particle sizes during synthesis, resulting in better self - gloss.
Operational Advice: Consult suppliers when purchasing. Choose high - gloss ABS grades. Well - known brands' high - gloss ABS can achieve high surface gloss and are easier to control product quality during injection molding.

2. Brightener Addition

Principle: Brighteners, like fatty acid esters and amides, form a smooth film on the ABS plastic surface, reducing micro - roughness. They migrate to the surface during plastic melt flow, enhancing surface properties.

Operation Suggestion: Add brightener at a rate of 0.5% - 2%. Test the proportion based on product requirements and brightener type. Use a high - speed mixer for pre - mixing to ensure even distribution before injection molding.

injection mould


II. Mold

1. Die Surface Treatment

Polishing Finish
Principle: Polishing the mold cavity and core reduces surface roughness, making the injection product's surface smoother and glossier. Different polishing degrees yield different gloss effects.
Operation Recommendation: For high - gloss products, achieve a cavity surface roughness (Ra) of 0.025 - 0.05μm. Combine manual and mechanical polishing. Start with sandpaper for rough polishing to remove marks, then use a polishing paste and electric polishing machine for a mirror finish.
Hard Chrome Plating
Principle: Plating a hard chromium layer on the mold surface offers high hardness, gloss, and wear resistance. It extends the mold lifespan and improves product surface gloss and release.
Operation Suggestion: The chromium plating layer is about 0.02 - 0.05mm thick. Pretreat the mold surface with cleaning, degreasing, and activation to ensure plating quality and adhesion.
Nitriding Treatment
Principle: Nitriding forms a hard nitriding layer on the mold surface, making it denser. This reduces plastic melt adhesion, resulting in a smoother product surface and better gloss.

Operating Recommendations: Nitriding temperature is around 500 - 550 °C for 10 - 50 hours, depending on mold size and material. Grind and polish the mold after nitriding to remove surface defects.

injection mould


III. Injection Molding Process

1. Increase Mold Temperature

Principle: A higher mold temperature keeps the ABS plastic melt fluid, better replicating the mold surface finish and enhancing product surface luster.
Operation Suggestion: For ABS injection molding, raise the mold temperature to 70 - 90 °C. But beware, too high a temperature may prolong cooling time, reduce efficiency, and cause product deformation. Control the mold temperature via the mold's heating device.

2. Adjust Injection Speed and Pressure

Principle: Increasing injection speed helps the plastic melt quickly fill the mold cavity, reducing temperature and pressure drops. Appropriate injection pressure ensures full cavity filling, avoiding surface defects.
Operation Suggestion: Adjust injection speed based on product size and shape, typically around 30 - 60mm/s. Set injection pressure between 70 - 100MPa. Observe product surface quality during debugging to avoid flash and trapped gas.

3. Optimize the Pressure Holding and Cooling Phases

Principle: Reasonable pressure holding prevents product shrinkage during cooling, ensuring surface flatness and gloss. Proper cooling solidifies the product surface quickly, forming a smooth surface.

Operation Suggestions: Set the pressure - holding pressure at 60% - 80% of the injection pressure. Determine the pressure - holding time based on product wall thickness (about 3 - 5 seconds per millimeter). Adjust the cooling time according to product size and shape to prevent deformation before mold opening.

injection mould


4. Gas - Assisted Injection Molding Technology

Principle: In gas - assisted injection molding, high - pressure gas (e.g., nitrogen) is injected into the cavity during plastic melt injection. It helps the melt better fit the mold surface, especially for complex shapes, and reduces internal shrinkage stress, improving product surface smoothness and gloss.
Operation Suggestion: Equip with special gas - assisted injection molding equipment. Determine the gas injection time (usually start when 70% - 90% of the cavity is filled with melt). Adjust gas pressure (5 - 20MPa) according to product size and wall thickness.

5. Microfoam Injection Molding Process

Principle: Microfoam injection involves injecting a physical blowing agent (e.g., supercritical carbon dioxide or nitrogen) into the plastic melt. The tiny bubbles formed improve melt flow and distribution, making the product surface flatter and reducing shrinkage marks, thus enhancing gloss.
Operation Recommendation: Install microfoam injection molding equipment, including a foaming agent injection system and special screw. Precise control of blowing agent injection (0.5% - 3%) is required. Adjust melt temperature (slightly lower than traditional injection molding) and injection speed to ensure uniform foaming.

6. Adopt Hot Runner System

Principle: The hot runner system keeps the plastic melt molten from the injection molding machine nozzle to the mold cavity. This reduces pressure and temperature drops in the melt flow, providing a stable and uniform melt flow for a smoother product surface and improved gloss. It also reduces waste.
Operation Suggestion: Consider installing a hot runner system during mold design. Choose the appropriate type based on product shape and size. Accurately control the hot runner temperature (190 - 230 °C for ABS). Regularly maintain the system by cleaning and checking heating elements and the runner interior.

injection mould


Home
Product
News
Contact
主站蜘蛛池模板: 日本在线视频www色| 厨房掀开馊了裙子挺进电影| 女人与公拘交酡全过女免费| 精品国产午夜肉伦伦影院| 日本五月天婷久久网站| 无码丰满熟妇| 亚洲碰碰人人av熟女天堂| 国产无av码在线观看| 8av国产精品爽爽ⅴa在线观看| 无码人妻一区二区三区免费视频| 国产精品夜色一区二区三区| 国产乱妇乱子在线播视频播放网站| 人人妻在人人| 国产又黄又大又粗的视频| 亚洲成在人线视av| 无码日韩人妻av一区二区三区| 亚洲精品无码午夜福利中文字幕| 1000部啪啪未满十八勿入下载| 色翁荡息又大又硬又粗又视频软件 | 久久久久亚洲av成人片乱码| 51看片免费视频在观看| 色偷偷88888欧美精品久久久| 日韩精品人妻av一区二区三区| 亚洲啪啪综合av一区| 中文字幕无码不卡一区二区三区| 国产欧美亚洲精品a第一页| 欧美激情内射喷水高潮| 免费无遮挡禁18污污网站| 99久久精品费精品国产一区二区| 九九久久精品无码专区| 人妻中文无码久热丝袜| 亚洲无线码高清在线观看 | 久久精品免费一区二区喷潮| 日韩人妻无码精品-专区| 国产色无码精品视频免费| 亚洲无码电影| 国产人成无码视频在线观看| 国产aⅴ夜夜欢一区二区三区| 综合色就爱涩涩涩综合婷婷| 无遮挡粉嫩小泬久久久久久久 | yw尤物av无码国产在线观看|