高速护坡模具按加工方式主要分为注塑、挤出和热成型3种。早期由于挤出级ABS树脂较少,模具制品大多采用注塑及热成型。随着挤出级ABS树脂的研发成功和广为应用,模具挤出制品在模具制品中所占比例越来越大。目前高速护坡模具的挤出理论和用于ABS材料的挤出机、挤出模具在国外已十分成熟。而国内这方面的研究起步较晚,挤出级ABS树脂最初主要用在各类管材上。随着我国汽车工业及家电行业的迅猛发展,极大地推动了国内挤出级ABS树脂的使用。
High speed slope protection molds are mainly divided into three processing methods: injection molding, extrusion, and hot forming. In the early days, due to the limited amount of extruded ABS resin, mold products were mostly injection molded and hot formed. With the successful development and widespread application of extrusion grade ABS resin, the proportion of mold extruded products in mold products is increasing. At present, the extrusion theory of high-speed slope protection molds and extruders and extrusion molds used for ABS materials have become very mature overseas. However, research in this area started relatively late in China, and extrusion grade ABS resin was initially mainly used in various types of pipes. With the rapid development of China's automotive and home appliance industries, the use of extrusion grade ABS resin in China has been greatly promoted.
国内各主要挤出机生产厂家针对高速护坡模具加工性能,纷纷推出了与之配套的挤出设备,但应用于模具的高档挤出模具还主要依赖进口,现在国内许多高速护坡模具生产厂家也已着手ABS挤出模具的研究。
Major domestic extruder manufacturers have launched extrusion equipment to match the processing performance of high-speed slope protection molds. However, high-end extrusion molds used in molds still rely mainly on imports. Currently, many high-speed slope protection mold manufacturers in China have also started researching ABS extrusion molds.
1995年开始,一批有实力的高速护坡模具企业,开始消化吸收国外欧式型材的技术精华,研制出自己的门窗系列,成为国内塑料门窗的主导,推动门窗的技术更新和发展,也使整个行业得到了空前的发展和高速增长。进入产品成熟期后,也即从2003年起,许多弊端开始反应出来,过高的利润率导致盲目投资过多,使行业综合产能近300万吨,远高于市场需求;很多新进入的投资者没有从产品创新、技术创新入手,而是简单模仿,甚至偷工减料,假冒伪劣,行业市场竞争处于非健康状态。原料市场价格不断上扬,加剧这种非健康的竞争,使部分企业经营处于困境,出现停产或半停产状态。
Since 1995, a group of powerful high-speed slope protection mold enterprises have begun to digest and absorb the technical essence of foreign European profiles, and developed their own door and window series, which has become the leading role of domestic plastic doors and windows, promoting the technical update and development of doors and windows, and also making the entire industry get the unprecedented development and high-speed growth. After entering the mature stage of the product, starting from 2003, many drawbacks began to be reflected. The excessively high profit margin led to blind investment, resulting in the industry's comprehensive production capacity of nearly 3 million tons, far exceeding market demand; Many new investors do not start with product and technological innovation, but simply imitate, even cut corners, counterfeit and inferior products, and the industry market competition is in an unhealthy state. The continuous rise in raw material market prices has intensified this unhealthy competition, putting some enterprises in a difficult position to operate, resulting in production stoppages or semi stoppages.