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路沿石模具采用工程pp（聚丙烯）原料，材料具有良好的可锻性、切削加工性、淬硬性、淬透性及可磨削性、还具有小的氧化、脱碳敏感性和淬火变形开裂倾向。 The PP and polypropylene materials are used as materials for road curb. The materials have good Forgability, machinability, hardenability, hardenability and grindability, and also have small oxidation, decarburization sensitivity and quenching deformation and cracking tendency. 所有的塑料模具所用的原材料都是一级新料,不加粉碎回料,所以不要市面上用粉碎回料做的模具,使用粉碎回料做的模具使用寿命短,容易老化,变形.表面不平整,水泥件不容易脱模.购买请慎重. All raw materials used for plastic moulds are first class new materials, without crushing and returning, so do not use moulds made by crushing and returning materials on the market. The mould made by crushing and returning materials is of short service life, easy to be aged and deformed. The surface is not smooth, and the cement parts are not easy to release. 一.不要比重量,切割开塑料模具可以比较一下产品壁厚。通过回收来的粉碎回料,经过粉碎后始终还带有水泥浆粉,在同样的钢模注塑成型下,做出来的产品只有重,不会轻. One. Do not compare the weight, cutting the plastic mold can compare the thickness of the product. Through the comminuted return of the recycled material, after comminuted with cement paste, in the same steel mold injection molding, the products made are only heavy, not light. 二.不要过于比较价格，买2个40元钱的模具还不如1个50元钱的模具耐用，做出来的水泥件尺寸稳定，又不外膨胀，不存在产品不合格的风险。 Two, do not compare the price too much. Buying 2 40 yuan mold is not as good as 1 1 Yuan mold, and the size of the cement parts is stable, and no matter the product is not qualified. 三、粉碎回料做的塑料模具，表面有很多黑点，浑浊不光亮，加力变形大。 Three, the plastic mold made of pulverizing back material, there are many black spots on the surface, and the turbidity is not bright and the force is greatly deformed. 四、模具产品外观不要有很多飞边毛刺，有刀销的痕迹。影响产品外观是钢模注塑的原因，钢模开不好，塑料模具质量也好不到哪里去。 Four, mold product appearance do not have a lot of flying burr, there is a mark of the knife pin. The influence of the appearance of the product is the reason for the injection molding of the steel mould, the failure of the steel mould and the quality of the plastic mold.