无码中文字幕日韩专区,真人无码作爱免费视频禁hnn,中字幕视频在线永久在线,国产av无码专区亚洲av麻豆丫

Welcome to Dongguan ITA Intelligent Manufacturing Technology Co., Ltd Feedback | Product | Contact Us | Chinese |

National Advisory Hotline

+86-769-89296989

Plastic mold purchase these six requirements can not be ignored

The plastic mold is an abbreviation for a combined mold for compression molding, extrusion molding, injection molding, blow molding and low foam molding. The coordinated changes of the mold convex and concave molds and the auxiliary forming system can process a series of plastic parts of different shapes and sizes. In order to meet the needs of molded parts, we need to pay attention to some matters when selecting plastic molds, and put forward corresponding requirements. The choice of a more suitable plastic mold below needs to meet the six requirements.

1. High Corrosion Resistance Many resins and additives have corrosive effects on the surface of the cavity. This corrosion causes the surface of the cavity to corrode and peel off, the surface condition deteriorates, and the quality of the molded part deteriorates. Therefore, it is best to use corrosion-resistant steel or chrome-plated, nickel-plated surfaces on the cavity surface.

2, good wear resistance, the gloss and precision of the surface of plastic parts are directly related to the wear resistance of the surface of plastic mold cavity, especially when some plastics add glass fiber, inorganic filler and some pigments, they Together with the plastic melt, it flows at idle speed in the flow channel and the cavity. The friction on the surface of the cavity is very large. If the material is not wear-resistant, it will wear quickly and the quality of the plastic part will be damaged.

3, good dimensional stability In the plastic molding, the temperature of the plastic mold cavity should reach 300 ° C or more. For this reason, it is preferable to use a suitably tempered tool steel (heat treated steel). Otherwise, it will cause a change in the microstructure of the material, resulting in a change in the size of the plastic mold.

4, easy to process mold parts are mostly made of metal materials, and some structural shapes are still very complex, in order to shorten the production cycle, improve efficiency, mold materials are required to be easily processed into the shape and precision required by the drawings.

5, good polishing performance Plastic parts are usually required to have a good gloss and surface state, so the surface roughness of the cavity is required to be very small, so the surface of the cavity must be surface processing, such as polishing, grinding and so on. Therefore, the selected steel should not contain rough impurities and pores.

6. Small effect by heat treatment In order to improve hardness and wear resistance, plastic molds are generally heat treated, but this treatment should have small dimensional changes. Therefore, it is preferable to use a pre-hardenable steel that can be machined.


Share to:
Top phone map Home
精品国产乱码一区二区三区APP| 亚洲欧美黑人猛交群| 永久免费无码网站在线观看| 啊灬啊灬啊灬快高潮视频| 被绑在机器上强行高潮的视频| 亚洲欧美成人一区二区在线| 一个人看的免费视频WWW| 亚洲产国偷V产偷V自拍色戒| 国产成人AV国语在线观看| 探花口爆颜射乳交日韩| 中文字幕免费无码专区| 精品成人av一区二区三区| 台湾无码av一区二区三区| 少妇无码一区二区三区| 免费无码A片一区二三区| 亚洲中国最大AV网站| 麻豆蜜桃国产精品无码视频网站| AAA级久久久精品无码片| 日本做受高潮好舒服视频| 国产精品国产三级国AV| 日韩精品一区二区午夜成人版| 大地资源网更新免费播放视频| 午夜精品一区二区三区在线视| 午夜寂寞支持安卓精品| 亚洲AV日韩精品久久久久| 亚洲AV永久无码精品| 色V99在线影院| 国产成人欧美视频在线观看| 动漫AV永久无码精品每日更新| 国产免费高清69式视频在线观看| 又大又粗欧美黑人aaaaa片| 色婷婷婷亚洲综合丁香五月| 麻豆国产AV穿旗袍强迫女佣人| 蜜桃av抽搐高潮一区二区| 国内精品久久久久影院蜜芽| 337P人体粉嫩胞高清视频| 在线欧美精品一区二区三区| 亚洲麻豆AV无码成人片在线观看| 色偷偷成人网免费视频男人的天堂| 成熟丰满熟妇高潮xxxxx视频| 色婷婷一区二区三区四区成人网|