不卡国产主播在线观看,日本a线上看全网,av天堂二区视频,最新中文字幕av地址,另类校园春色小说,亚洲图片小说视频区,久久午夜国产精品www在线观看,熟女少妇欧美另类,激情综合网视频区

Polyurethane foaming machineDue to the high temperature, the injected foam cannot be pushed to the front end of the foaming process of the box body. In case of partial cavitating of the box body, the black and white materials should be treated at a constant temperature before foaming, and the foaming temp

發(fā)The temperature of the preheating furnace of the foam equipment should be controlled at 30~50℃, and the temperature of the foam mold should be controlled at 35~45℃.

Polyurethane foaming machineWhen the mold temperature is too high, the plastic liner is deformed by heat, and the reaction of the bubble liquid system is violent. Therefore, the temperature of foam mold and the ambient temperature of foam furnace must be strictly controlled. Especially in winter, it is necessary to open the line every morning to preheat the foam mold, preheating furnace, the foam furnace and the box and door body for more than 30 minutes. The foaming system must be cooled and cooled after a period of foaming in summer.