蜜桃久久精品成人无码AV_国产成A人片在线观看视频下载_国内精品久久久久精品爽爽_国产乱子伦

What are the processing points of PBT engineering plastics

2019-08-09 1206

Monotonic treatment: this kind of data is easy to hydrolyze under high temperature, so monotonic treatment before processing is very important. It is suggested that the monotonic condition in air is 120 ℃, 6-8 hours, maybe 150 ℃, 2-4 hours. It is necessary that the humidity be less than 0.03%. If the hygroscopic monotone is used, the recommended condition is 150 ℃ for 2.5 hours.

2. Melting temperature: 225-275 ℃, recommended temperature: 250 ℃.

Mold temperature: 40-60 ℃ for unreinforced type. The cooling cavity of the mold should be well designed to reduce the twists and turns of the plastic parts. The loss of heat must be fast and uniform. It is recommended that the diameter of the mold cooling cavity is 12mm.

3 injection pressure: medium (up to 1500bar).

4 injection speed: the injection speed should be as fast as possible (because PBT coagulates quickly).

5 runner and gate: Circular runner is recommended to increase pressure transmission (empirical formula: runner diameter = plastic thickness +1.5mm). Be able to use various types of gates. Warm runner can also be used, but attention should be paid to avoid data leakage and degradation. The gate diameter should be between 0.8-1.0*t, where t is the thickness of the plastic part. For submerged gates, a minimum diameter of 0.75mm is recommended.

Article source: PBT engineering plastics http://www.fcyou.com/


主站蜘蛛池模板: 乌审旗| 江永县| 张家口市| 凤城市| 渭南市| 南丰县| 西畴县| 烟台市| 常宁市| 孙吴县| 南丹县| 温泉县| 花莲县| 龙川县| 浑源县| 克拉玛依市| 遵义县| 房产| 武鸣县| 福州市| 宜黄县| 库车县| 霍邱县| 神木县| 兴海县| 穆棱市| 辽阳县| 同德县| 古交市| 贵港市| 牡丹江市| 岳普湖县| 山东| 含山县| 同仁县| 富民县| 无极县| 鹤山市| 临高县| 陆丰市| 长治市|