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The difference between electric wood molds and plastic molds
2024-12-05 08:04:18

Electric wood molds should be called bakelite molds. Some of you think that electric wood molds are made by pressing electric wood powder, but now the vast majority of bakelite molds are made using specialized injection molding machines for products. The main difference between laminated wood molds and plastic molds is that laminated wood molds must be made into hard molds, with larger sprues and sprue sleeves for injection. The sprues for injection generally require inserts. The difference between laminated wood molds and plastic molds is that the molding temperature of laminated wood molds is very high, so heating is required. Therefore, there should be heating tubes in the mold, while plastic molds are generally cooled. During the molding process, there are certain gaps on the parting surface of the laminated wood mold, which are very small and depend on the size and quality requirements of the product. The products produced have burrs at the puncture site. The electric wood mold used for injection is not much different from the plastic mold, only slightly different.


1. The materials used for the electric wood mold are 8407635, SKD61 materials, which require good quality and hardness at high temperatures.


2. Electric wood molds are prone to wear and tear, so they need to be heat treated to around HRC60, which means they need to have a hardness similar to that of cutting tools. Of course, if the quantity is not large, it is also feasible to use pre hardened steel of NAK80 type, around HRC40.


3. The areas that are particularly prone to wear and tear are the injection points, so it is best to make the injection points into inserts, such as white steel or black steel. Of course, Wugang is the best, but Wugang is fragile and can only be processed by wire cutting or grinding. Made into replaceable inserts for easy replacement after wear and tear.


4. As the mold needs to be heated, a heating tube or heating element must be added.


5. In order to prevent the heat from being carried away by the injection molding machine during heating, it is necessary to add insulation boards on both the upper and lower panels, which can be asbestos or electric wood boards.


6. Due to the thermal expansion caused by heating the mold, in order to prevent the mold from getting stuck, the guide post and guide sleeve of the mold should be slightly looser than the plastic mold.


7. Electric wood molds are prone to sticking, so they should be made smooth and the surface of the mold cavity should be plated with hard chromium. The cut surface must not have any patterns, and if the top surface is large enough to be smooth, there can be some decorative patterns


8. The steel used for electric wood molds is different from that used for plastic molds. The upper and lower plates of the mold need to be covered with a layer of insulation board.



9. Electric wood belongs to thermosetting materials The temperature of electric wood powder in the barrel is 100 degrees, at the gate it is 160 degrees, and inside the mold it is 180 degrees The electric wood injection mold needs to be heated to 160 degrees before injection molding, so a heating tube needs to be added


10. The steel used for the electric wood mold is similar to that of the plastic mold, with either 8407, S136 heat treatment, or SKD61 heat treatment. However, the most important thing is that the mold must be polished to 2000 # sandpaper and then plated with hard chromium to prevent sticking to the mold. The mold must be heated with a heating rod inside to produce the product.