欧美日韩毛片熟妇有码无码,亚洲欧美日韩久久精品第一区 ,国产AⅤ激情无码久久久无码,狂躁美女大bbbbbb视频

Welcome to [ Wuxi Funecon Precision Mould Plastic Co., Ltd. ] website! Home| Sitemap| Email
Moulding Your Future

Enquiry:

138-6185-1071

138-6185-1071

How to deal with side dents in injection molds

Side dents in the injection mold are caused by local internal shrinkage caused by gate sealing or missing material injection. The depression or depression caused by the surface of the injection molded article is an old problem in the injection molding process. The dent is generally caused by a local increase in the shrinkage of the product due to an increase in the wall thickness of the plastic article. The degree of expansion and contraction depends on many factors. So, how do the side dents of the injection mold be treated?
1. In the process of holding the molded part, a plastic material is additionally injected into the cavity to compensate for the mold shrinkage. In most cases, the gate is much thinner than the rest of the part. When the molded part is still hot and shrinks continuously, the small gate has solidified. After curing, the molded part in the cavity is not pressed. kick in.
2. The molded part of the semi-crystalline plastic material has a high shrinkage rate, which makes the dent problem more serious; the molding shrinkage of the amorphous material is lower, the dent is minimized; the reinforced material is filled and maintained, The shrinkage is lower and the possibility of dents is smaller.
3. the thick injection molded parts have a long cooling time and will produce large shrinkage. Therefore, the large thickness is the root cause of the dents. The design should pay attention to the thick-walled parts. If it is impossible to avoid thick walls, it should be designed. The hollow, thick parts are smoothed to the nominal wall thickness, and the large arc instead of the sharp corners can eliminate or minimize the dents generated near the sharp corners.
2018/08/02 10:13:54 6364 次

Hot News

Copy right of the 2018 Wuxi Funecon Precision Mould Plastic Co., Ltd. All Rights Reserved

国产无套内射普通话对白| 无码人妻一区二区三区免费n鬼沢| 亚洲国产精品无码久久sm| 把极品白丝老师啪到腿软| 无码国产69精品久久久久孕妇| 被多个强壮的黑人灌满浆| 欧美变态另类刺激| 奇米影视7777久久精品人人爽| 国产精品无码免费专区午夜| 亚洲AV无码偷拍在线观看| 性色国产成人久久久精品一区二区| 人妻av中文系列| 破外女13一14在线观看| 精品久久久无码21P发布| 久久99亚洲精品久久久久| 亚洲国产精品日韩AV不卡在线| 日本公妇乱偷中文字幕| 伊人思思久99久女女精品视频| 无码人妻少妇伦在线电影| 性饥渴老太xxxxxhd| 被绑在打桩机上抹春药| 无码精品a∨在线观看免费| 色偷偷国色天香在线观看免费视频 | 亚洲中文字幕无码永久在线| 久久久www成人免费毛片| 一男一女做爰高潮a片| 日韩欧美亚洲国产精品字幕久久久| 日韩激情| 午夜夫妻试看120国产| 亚洲av在线观看| 欧美性白人极品1819hd| 久久亚洲精品无码| 局长趴在雪白的身上耸动| 欧美老妇交乱视频| 国产综合久久久久久精品| aaa级久久久精品无码片| 99久久国产福利自产拍| 无码国产精成人午夜视频一区二区| 国产在线拍偷自揄拍无码成人小说| 好爽好黄的视频| 狠天天狠天天香蕉网|