(上接2009年第4期)7、双片材热成型[1-3]另一种新技术是对两片塑料热成型,并把它们焊接在一起,制成一个空心制品,很像吹塑模生产的产品。称之为双片材热成型的过程有两个基本的变化,连续的双片热成型法,把一块塑料片送入模具的一边热成型(通常是下半模),这时另一块塑料片正在加 (Continued on 2009 No. 4) 7, double sheet thermoforming [1-3] Another new technology is the two pieces of plastic thermoforming and welding them together, made of a hollow product, much like blowing Mold production of products. There are two fundamental changes in the process called thermoforming of a double sheet. A continuous two-piece thermoforming process involves thermoforming a piece of plastic (usually the lower half) onto one side of the mold, while the other piece of plastic Adding