http://www.plastics-china.com/Blog Blog of plastic injection molding and plastic parts Sat, 13 Feb 2010 14:05:27 +0000 http://backend.userland.com/rss092 en Today is 13th Feb 2010 - the Chinese New Year Eve of the tiger year! I representing our company best wishes to our customers of domestic and abroad, happly 2010 Chinese Tiger Year and a prosperous year for business and good health. More of company and services you can visit our showroom: ... http://www.plastics-china.com/Blog/index.php/2010/02/13/2010-chinese-new-year-eve/ Good new year to all of our customers! Here we are providing this year's best offer of our - 2" Round Polypropylene Plastic EIFS Stucco Fasteners: EIFS stands for Exterior Insulation and Finish Systems. The product is also called synthetic stucco, and refers to a multi-layered exterior finish that's been used in ... http://www.plastics-china.com/Blog/index.php/2010/01/29/plastic-eifs-stucco-fasteners-on-sale-2010/ Let us consider the methods of  incorporating cavity and core. We have now seen that in general the core is incorporated in the moving half and the cavity in the fixed half. However, there are various methods by which the cavity and core can be incorporated in their respective halves ... http://www.plastics-china.com/Blog/index.php/2009/12/08/integer-cavity-and-core-plates/ Basic Terminology Impression: The injection mold is an assembly of parts containing within it an "impression"  into which plastic material is injected and cooled. It is the impression which gives the molding its form. The impression may, therefore, be defined as that part of the mold which imparts shape to the ... http://www.plastics-china.com/Blog/index.php/2009/12/03/general-mold-construction/ Plastic foam sheets have many applications. They can be used for thermal insulation or packaging purposes, or can be thermoforming into meat trays, eggs cartons, fast-food plates, and containers. Generally the production of polymer foams by extrusion consists of the following steps. First, a polymer resin is melted in the extruder ... http://www.plastics-china.com/Blog/index.php/2009/10/27/foam-sheets-coventional-foam-sheet-processing/ Plastic foams can be defined as plastic materials that container at least two phases: a solid polymer matrix and a gaseous phase. It is possible to have extra solid phases in plastic foams, such as blend of polymers or fillers. Because of the void present in the material, foamed plastics ... http://www.plastics-china.com/Blog/index.php/2009/10/18/plastic-foam-molding/ In the extrusion process, polymers is propelled continuously along a screw through region of high temperature and pressure where it is melted and compacted, and finally forced through a die shaped to give the final object. Extrusion is used to make three main types of products: 1. Standard frofile shapes such as ... http://www.plastics-china.com/Blog/index.php/2009/10/06/plastics-extrusion-molding/ Fingering, gas bubbles, hesitation lines, burning of resin, witness lines, cold slug, and gas blow-out are typical defects normally encounterted in GAIM. Fingering, or gas permeation, is a common problem encountered in GAIM. In fingering, gas escapes from the gas channel and migrates into undesired areas of the part. Severe gas ... http://www.plastics-china.com/Blog/index.php/2009/10/05/types-of-process-defects-in-the-gaim/ Mosco city mayor Yury Luzhkov recently open fires on plastic shopping bags, hoping the supermakrts no longer provide nondegradable plastic bags to shoppers and will also charge them on environmental-friendly bags - this money will be used for charity purpose. Also the Mosco officials declared a plan, that is till the ... http://www.plastics-china.com/Blog/index.php/2009/10/04/fires-on-plastic-bags/ All processes have their disadvantages, but those of GAIM and GAMIC ( Gas-assisted injection molding with internal-water cooling) appear relatively minor compared with their significant advantages. 1. Large hollow sections GAIM is not well suited for thin-walled hollow parts such as bottles or tanks. However, the thin-wall part has also tried out ... http://www.plastics-china.com/Blog/index.php/2009/10/03/disadvantage-of-the-gaim-process/