东北女人啪啪对白,日本高清无日本高清视频,久久婷婷无码欧美日韩,国产成人亚洲精品无码H

Map

Do you know how to control the temperature of the injection molding process?

2017.09.14

Source: Golden Eagle Press

Reading:

The melt temperature is very important, and the temperature of the cylinder used is only guidance.The melt temperature can be measured at the nozzle or by air injection.The temperature setting of the ejection cylinderdepends on the melt temperature, screw speed, back pressure, injection quantity and injection molding cycle. If you have no experience working with a particular level of plastic, start with the lowest setting. For easy control, the ejector cylinder is divided into sections, but not all of them are set to the same temperature. If the operation time is long or operating at high temperature, please set the temperature of the first area to a lower value, which will prevent the premature melting and shunt of plastics. Ensure that the hydraulic oil, hopper closure, mould and ejector cylinder are at the correct temperature before the injection molding begins.

1. Cylinder temperature:

The melt temperature is very important, and the temperature of the cylinder used is only guidance. The melt temperature can be measured at the nozzle or by air injection. The temperature setting of the ejection cylinder depends on the melt temperature, screw speed, back pressure, injection quantity and injection molding cycle. If you have no experience working with a particular level of plastic, start with the lowest setting.


For easy control, the ejector cylinder is divided into sections, but not all of them are set to the same temperature. If the operation time is long or operating at high temperature, please set the temperature of the first area to a lower value, which will prevent the premature melting and shunt of plastics. Ensure that the hydraulic oil, hopper closure, mould and ejector cylinder are at the correct temperature before the injection molding begins.

2. Melting temperature:

Melt temperature of the melt flow behavior plays a main role, because no specific plastics, melting point, the melting point is a segment of the temperature of the molten state, the plastic different molecular chain structure and composition, and therefore have different influence on its liquidity, molecular chain rigidity affected by temperature is obvious, such as PC, PPS, and flexible chain, such as: PA, PP, PE and so on by changing the liquid temperature is not obvious, so should be based on different materials to reasonable injection temperature calibration. Vertical injection molding machine, precision injection molding machine.


3. Mold temperature:

Some plastic materials due to their high crystallization temperature, crystallization speed is slow, need higher mold temperatures, some due to control the size and deformation, or the need of mold release, to high temperature or low temperature, such as PC generally requires more than 60 degrees, the PPS in order to achieve better appearance and improve liquidity, die temperature sometimes need more than 160 degrees, and mold temperature for improving product appearance, shape, size, has not to appraise the effect of plastic mold.

4. Injection pressure:

Melt forward to overcome the resistance, a direct impact on product size, weight and deformation, etc., different injection pressure needed for plastic products, such as PA, PP material, such as increasing pressure will significantly improve its liquidity, injection pressure determines the density of the product, namely the gloss appearance. It has no fixed numerical value, and the more difficult the mold filling is, the pressure of injection molding is also increased.

极品美女母乳大喷射电影在线播放 | 欧美成人性色生活片免费网站 | 一级a一级a爱片免费免免高潮 | 欧美 日本 亚洲 | 亚洲精品国产精品国自产网站按摩 | 亚洲AV无码一区二区三区在线 | 国产乱人伦无码视频 | 免费一级无码婬片AAAAA夜秀 | 久久久久久免费免费麻辣 | 国产又粗又猛又爽又黄的国漫视频 | 农民乡下一级毛片真人 | 内射 无码 在线播放 | 我和丰满岳疯狂做爰 | 欧美三级三级三级爽爽 | 国产无遮挡又黄又爽免费网站 | 少妇做爱免费八戒A片 | 手机成人免费视频 | 少妇媚黑黑人系列在线 | 国产AV综合AV天堂色欲四季 | 亚洲精品久久久无码白峰美 | 高清无码在线国产 | AV毛片AV毛片AV毛片AV毛片 | 精品少妇高潮乱码久久久久 | 男人的天堂AV高清在线 | 国国产自偷自偷免费一区在线 | 商场女厕一区二区三区在线 | www.juse| 色妞在线综合亚洲欧美 | 成人无码一二三产区入口 | 久久久久裸体模特视频 | 夏晴子国产一区二区在线观看 | 中文字幕精品久久久久人妻红杏Ⅰ | 嫩草研究院欧美性爱 | 国产精品一爱豆AV | 高清无码不卡免费看 | 亚洲国产成人精品女人久久久 | 中文字幕-区二区三区四区视频 | 911人人妻人人看视频 | 日本熟妇乱妇熟色A片蜜桃 女人下边被添全过视频 | zjzjzj亚洲熟妇在线观看 | 国精品人妻无码一区二区三区性色 |