| 注塑成型植草护坡砖模具有黑斑黑纹原因 |
| 添加时间：2019/3/8 13:45:15 浏览次数： |
| 1.植草护坡砖模具注塑成型后表面产生黑斑黑纹的情况。 1. Black spots and black stripes on the surface of grass-planting slope-protection brick mold after injection moulding. 黑斑和黑纹是植草护坡砖模具表面呈现暗色点或暗色条纹，褐斑和褐纹相同类型的瑕疵只是燃烧或掉色的污染的程度没有那么严重而已。护坡模具表面发生黑斑黑点的原因主要还是因为使用的塑料颗粒本身存有杂质，或者在对塑料原料在烘干处理过程中不当，塑料颗粒在料筒中待料时间过长而过热裂解。 Black spots and black stripes are dark spots or dark stripes on the surface of the mould of grass slope protection brick. The same type of defects of brown spots and brown stripes are only less serious pollution caused by burning or discoloration. Black spots on the surface of slope protection die are mainly caused by the presence of impurities in the plastic particles used, or the improper drying treatment of the plastic raw materials, and the excessive thermal cracking of the plastic particles in the barrel due to the long waiting time. 2.塑料护坡模具浇筑成型后模具表面脆化的情况。 2. The surface embrittlement of plastic slope protection mould after casting. 脆化产生的原因主要是因为材料裂解，使用分子链变短，分子重量变低，结果使得植草护坡砖模具的韧性等物理性能变差。极有可能导致模具的断裂或破损。 The main reasons for brittleness are material cracking, shorter molecular chains and lower molecular weight. As a result, the toughness and other physical properties of the mould of grass-planting slope protection brick become worse. It is very likely that the die will be broken or damaged. 3.烧痕在水泥模具表面产生的情况。 3. The situation of burning mark on the surface of cement mould. 烧痕是植草护坡砖塑料模具接近流动路径末端或包风区域的暗色或黑色小点，其主要形成的主因是射出的速度过快或压力过高，使模穴内的空气无法逃逸，受压缩造成高热而烧焦。 Burning mark is a dark or black spot near the end of the flow path or the windshield area of the plastic mould for grass-planting slope-protection brick. The main reason is that the air in the mould cavity can not escape because of the high velocity or pressure of the injection, and the high heat caused by compression and burning. 4.植草护坡砖模具掉色的生产情况 4. Production Situation of Decoloring Mould of Grass-planting and Slope-protecting Brick 掉色的指塑料模具与原料颜色上发生的一定的变化，这可能是因为原料裂解或被污染造成的。比方说：使用的塑料原料在料筒内带的时间过长；料筒温度过高，造成的塑料变色；采用了二次回料的情况。 Decoloration refers to certain changes in the color of plastic moulds and raw materials, which may be www.baodingjiaju.com.cnwww.hupomuju.com.cnzhuzaojg.37ix.com.cnwww.baodingyasi.cn www.bdkongyaji.com.cnwww.jinzhongbanjia.cncaused by cracking or contamination of raw materials. For example: the use of plastic raw materials in the barrel for too long; barrel temperature is too high, resulting in plastic discoloration; the use of secondary recycling situation. |
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