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Polishing is essentially the removal of metal by the action of free abrasive grains carried to the work piece by a tool.Here is several reasons for plastic mold polishing are liseted below: 1)Plastic mold polishing may achieve special optical properties in a product,will enlight beams pass through the produt wall(compact disc,mirrors,etc),any major unevenness or waviness will distort the light and result in poor performance of the product. 2)Plastic mold polishing may enhance the appearance of the product,This is the most common requirement in plastic mold.It should be noted,however,that th appearance often is required for the visible outside only.Often,no polish is required on the seen inside of the product,and the finish there need not be better than that required for easy ejection of the product from the mold.For clear plastic products where the inside finish as the outside of the product. 3)Plastic mold polishing may faciliate ejection.This applies generally produced by deep recesses in the cavity or where there is little draft angle specified,the cavity must also be free of roughness that may prevent easy ejection. 4)Plastic mold polish may prevent stress risers in a product.Any sharp indent or corner in hardened mold steel,usually created during grinding,will increase the rish of breakage caused by stress concentration.Such corners must be polished to remove the sharp"gouges".

A special optical properties in a product achieve by plastic mold at time of polishing, so then enlighten beams will pass through the product wall. (Compact disc, mirrors, etc.) Any major unevenness or waviness will distort the light and result in poor performance of the product.

During 11 years of SINO team's creating, in the starting of SINO MOULD, we got to know that the workmanship is the most important at that time, and we know the workers who are dealing with air conditioner moulds or other home appliance moulds, we trust that their quality mentality will be better then the people who are dealing with motor cycle moulds...from that time, our HR department choosed the people who came to SINO. Most of our top managers and designers were dealed with air conditioner moulds or other home appliance moulds, untill now we have made many air conditioner moulds, such like air conditioner housing moulds, air conditioner mask moulds, air conditioner fan mould, air conditioner grille moulds...for the grile and mask moulds, we use DIN 1. 2316 tempering steel for cavities long lasting polishing and DIN 1. 2738 for the core side.

There are so many companies produce plastic injection chair molds all over the world. SINO is one of the manufacturers and specialized plastic injection molding chairs. arm chairs, armless chair, gas assistant chair moulds and etc. How is SINO chair moulds: 1. Good plastic chair mold design, SINO has a strong team and they have rich experience in designing the chair moulds. They are mould design is the most important step for manufacture a good plastic chair mold, reasonable mould structure, the suitable ejector system, injection system, cooling system, air venting system, guide system. 2. SINO will choose the suitable steel, DIN1.2738 is very good steel for chair mold, and if customer have wanna use P20, also ok. 3.SINO Choose the best suitable tooling technical, Using big CNC milling tooling machine and mould press machine. 4. Mould assembling, the chair mold assembling must be very carefully, check connect of every mould plate; ejector pin, stripper, eject block or slider should move smooth. 5. Good technician manual polishing or plus hard chrome plating keep the chair long time lasting shine. For more about SINO chair moulds, pls feel free to contact me.