Batch and continuous jig experiments were compared using plastic mixtures with different light and heavy particle ratios. The purity of bottom layer products of continuous jig was lower than those of batch jig because of light particle entrainment induced by the screw-type extractor. To minimize entrainment, a new discharge system consisting of a vertical restraining wall and a screw-type extractor was developed. The restraining wall was installed close to the “product-end” to separate the jig chamber into two and allow particles to transfer from one part to the other via the gap under the wall. The experimental results showed that this proposed discharge system could improve the purity of heavy particles in bottom layer products because of two reasons: (1) higher material mass ratio of heavy plastic close to product-end, and (2) changes in the flow of water and particles. Moreover, the purity of bottom layer products during continuous jig separation was influenced by the difference of material mass ratio in feed; that is, purity was higher when the ratio of heavy plastic was high. In addition, an estimation procedure based on multi-step treatment using separation curves is proposed to achieve the target purity of bottom layer products.

使用具有不同轻质和重质颗粒比的塑料混合物比较了批量和连续夹具实验。连续夹具的底层产品的纯度低于批量夹具的纯度，这是由于螺旋型提取器引起的轻粒子夹带。为了最大程度地减少夹带，开发了一种新的排放系统，该系统由垂直约束壁和螺旋式提取器组成。约束壁安装在靠近“产品端”的位置，以将夹具腔室分成两部分，并允许颗粒通过壁下的间隙从一个部分转移到另一部分。实验结果表明，提出的排料系统可以改善底层产品中重颗粒的纯度，其原因有两个：（1）较高的重质物料质量比接近产品末端，（2）水和颗粒流的变化。此外，连续夹具分离过程中底层产品的纯度受进料中物料质量比的差异的影响。即，重质塑料的比例高时，纯度高。另外，提出了基于分离曲线的多步骤处理的估计程序，以实现底层产品的目标纯度。