JP2004050427A5

JP2004050427A5 -

Info

Publication number: JP2004050427A5
Application number: JP2002206990A
Authority: JP
Filing date: 2002-07-16
Publication date: 2004-12-09
Anticipated expiration: 2022-07-16

Description

【００１８】
図示の可塑化装置２におけるリサイクル材料の可塑化と蓄積及び送出は、可塑化スクリュ２３の回転による樹脂圧又は樹脂圧による後退及び前進移動とにより行われ、計量は射出装置１における前進位置の射出プランジャ１１の樹脂圧による後退により行われるが、可塑化装置２は定位置で回転する可塑化スクリュを内装したものであってもよい。その何れの場合でも可塑化された樹脂の送出圧力（たとえば８００Ｋｇｆ／ｃｍ² ）は、射出プランジャ１１による射出圧力よりも著しく低圧であることから、樹脂圧によりフイルター４７の網目が変形して短期間で機能を失うことはない。[0018]
The plasticization, accumulation and delivery of the recycled material in the illustrated plasticizing device 2 are performed by the resin pressure due to the rotation of the plasticizing screw 23 or by the backward and forward movement by the resin pressure, and the metering is performed at the injection position of the advancing position in the injection device 1 Although it is carried out by retreating by resin pressure of plunger 11, plasticization device 2 may be one having a plasticizing screw rotating at a fixed position. In either case, the delivery pressure of the plasticized resin (for example, 800 kgf / cm ² ) is significantly lower than the injection pressure of the injection plunger 11, so the mesh of the filter 47 is deformed by the resin pressure and the short term You will not lose functionality with

【００２１】
また異物除去装置４を可塑化装置側に設けたことによって、フイルター４７が射出圧力の抵抗とならず、射出装置側に設けた場合に生ずる樹脂の流動圧力損出を来すことなく、リサイクル材料の可塑化から射出充填に至る行程を、通常のプリプラ式射出成形機と同様な成形サイクルのもとに行うことができる。これにより異物の混入を嫌って直接使用を避けていたリサイクル材料を、通常材料と同様に精密成形品などの成形用材料として使用できるようになる。この結果、熱履歴の少ないリサイクル材料による品質の高い製品の射出成形が可能となる。[0021]
Further, by providing the foreign matter removing device 4 on the plasticizing device side, the filter 47 does not become a resistance to the injection pressure, and the flow pressure loss of the resin caused when the filter 47 is provided on the injection device side The process from plasticization to injection filling can be performed under the same molding cycle as a conventional pre-plastic injection molding machine. As a result, it becomes possible to use the recycled material, which has avoided direct use from the mixture of foreign substances, as a molding material for precision molded articles, etc., as with ordinary materials. As a result, it becomes possible to injection-mold a high quality product made of a recycled material having a small heat history.