注塑模具则中英文对照版.doc

Document Owner: Lawrence Chung Maintained by: HK PDM REVISION DESCRIPTION OF CHANGE CHANGE NO. DATE RELEASED 1 Initial Release 26222 May 2006 (See Agile) APPROVALS OBTAINED IN AGILE  Injection Molding Guideline 1. Plastic Material Assume the general purpose grade plastic materials to be used for our molding In case of special grade materials, please list the material grade brand on our tool plan All the plastic materials for molding must be same as the materials during development stage. In case of material shortage or cost issue, the new sourced material shall be tested and confirmed acceptable prior use. 2. Colorant All the colorant must be conformed to heavy elements directives for both ASTM F963 EN71. Most of the dry pigments are hygroscopic; they must be properly sealed after use. For the components with high color consistence, the masterbatches or pre-color plastic materials are required. 3. Regrind Material Ratio For plastic material on structural components, no regrind is allowed For general purpose material on non structural components, 20% maximum runner regrind can be blended with virgin material. For those translucent or true white color components, no regrind is allowed. For short glass filled materials, 15% maximum regrind can be blended with virgin material For long glass filled materials, no regrind is allowed. The maximum number of regrind passes for general purpose materials shall be 3. Only 1 time of regrind pass is allowed for short glass reinforced materials The regrind ratio shall be shown in our updated tool plan to follow. The regrind ratio and no. of regrind passes has to be validated and confirmed during development stage. If not, no regrind will be allowed. ?Burned or discolored sprues or parts must not be used as regrind. Hot nozzle hot runner is our preference to eliminate runner scrap. 4. Material Drying Most plastic resins require thorough drying prior injection molding to assure maximum properties in the molded pa