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Analysis of the five elements that need to be met in injection molding

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Plastic molding is the process of making various forms (powders, pellets, solutions and dispersion) of plastics into products or blanks in the desired shape.The manufacturing process of most cosmetic packaging materials is mainly through the four key processes of mold molding, surface treatment,printing,and assembly.The molding process is an indispensable key part.Injection molding is a method of producing shapes for industrial products.Products usually use rubber injection molding and plastic injection molding.Injection molding can also be divided into injection molding compression method and die-casting method.Injection molding machine is the main molding equipment that uses plastic molding molds to make plastic products of various shapes. Injection molding is realized by injection molding machines and molds.

The five elements that need to be met in injection molding are:

  1. Temperature:Temperature is the first step of injection molding.Temperature can be divided into:drying temperature,material temperature,mold temperature, these are some of the most important factors.The drying temperature is to dry the polymer in advance in order to ensure the quality of the molding,to ensure that the dry and wet of the polymer are within a certain amount;The material temperature is to ensure that the polymer is plasticized normally,and the mold is filled and formed smoothly;
  2. Speed:Speed is divided into:injection speed,Melting speed,loosening and retreating speed,opening and closing mold speed,thimble forward and backward speed.The increase of the injection speed will affect the increase of the filling pressure,and the increase of the injection speed can increase the flow length,and the product quality can be uniform to ensure the quality of the product.High-speed injection is suitable for long-process products,and the size of the product is controlled at low speed;Melting speed affects plasticizing ability,plastic mold processing is an important parameter of plasticizing quality,the higher the speed,the higher the melt temperature,the stronger the plasticizing ability;
  3. Pressure:Pressure is divided into: injection pressure,holding pressure, back pressure,clamping pressure,mold protection pressure,ejection pressure.
  4. Position:The position can be divided into:mold opening position, ejection retreat stroke,metering stroke,leg loosening amount,injection stroke,and buffering amount.The mold opening position is to ensure the normal operation of the demolding parts.The effect of the ejection back stroke on the partial spring return to the ejection limit protection.The metering stroke is to ensure that there is enough plastic to fill the mold to ensure product quality.
  5. Time:The time is divided into:cooling time,sol time,drying time, cooling time,melting time,drying time,cycle,injection time,and pressure holding time.The molding of plastic shell paintingproducts requires a certain period of time.The holding time is to prevent the melt back flow and cooling shrinkage.The cooling time ensures that the product is solidified and prevents deformation;the melting time is to ensure that the glue is fully melted;the drying time is to ensure that the product does not become elongated or defective.

The E-make company has 30 years of experience in custom-made production of injection molding.The plastic injection molding products will be exquisite in appearance,reliable in quality and delivered on time.If you want to customize the high-precision injection molding products.All information from customers was kept secret,we can sign NDA with you before starting any work.If you need any help,please feel free to contact us.

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Injection molding service

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Injection molding is a method of producing shapes for industrial products.Products usually use rubber injection molding and plastic injection molding.Injection molding can also be divided into injection molding molding method and die-casting method.Injection molding machine (abbreviated as injection machine or injection molding machine) is the main molding equipment that uses plastic molding molds to make various shapes of plastic products from thermoplastics or thermosets. Injection molding is achieved through injection molding machines and molds.Plastic injection molding is a method of plastic products.The molten plastic is injected into the plastic product mold by pressure,and then cooled and molded to obtain various plastic parts.There are mechanical injection molding machines dedicated to injection molding. The most commonly used plastics are polyethylene,ABS,PA, PC,polystyrene, etc.
As we all know,PC is commonly known as polycarbonate and has very good mechanical properties,so it is commonly known as bulletproof glue. And PC material has the characteristics of high mechanical strength,wide use temperature range,good electrical insulation performance,good dimensional stability,and transparency.Therefore,the use of PC materials can be used in many occasions. For example,it is widely used in electrical products,electrical instrument housings,and electronic product structural parts.On the other hand,there are many modified PC products,usually adding glass fiber,mineral fillers,chemical flame retardants,and other plastics.Another point is that PC materials have poor fluidity and higher processing temperatures,so the processing of modified materials requires a special plasticized injection structure.This is one of the characteristics of the PC.And Regardless of its mechanical properties,or temperature range are very superior.PC also has the characteristics of good insulation and dimensional stability.It can be used in many situations.Of course,the fire performance of PC is also good.
But Whether the design of the injection mold is reasonable will directly affect the quality of plastic products.The main factors affecting plastic shrinkage include thermal shrinkage,phase change shrinkage, orientation shrinkage,compression shrinkage and elastic recovery.
These influencing factors are related to the molding conditions or operating conditions of precision injection molded products.Therefore, mold designers must have rich design and injection molding experience, and must consider the relationship between these influencing factors and injection conditions and their apparent factors,such as injection pressure and cavity pressure and filling speed,injection melt temperature and mold temperature ,Mold structure and gate form and distribution, as well as the influence of factors such as gate cross-sectional area,product wall thickness,reinforcing filler content in plastic materials and orientation of plastic materials.
The E-make company has 30 years of experience in custom-made production of injection molding.The plastic injection molding products will be exquisite in appearance,reliable in quality and delivered on time.If you want to customize the high-precision injection molding products.All information from customers was kept secret,we can sign NDA with you before starting any work.If you need any help,please feel free to contact us.

Injection Molding For Plastic Parts

The Difference Between Steel Mold And Aluminum Mold

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The Difference Between Steel Mold And Aluminum Mold

The mold we usually use for injection molding process is steel mold or aluminum mold.Below is some difference between them.
1.Tool life.
The steel mold is with high hardness,so it is more wearable and long life.The aluminum mold is opposite,which is with low hardness and are easy to out of shape .So we will use steel mold for mass production with large quantity and use aluminum mold for small batch production.
2.Tool weight.
The steel mold is more heavier.
3.Tool cost.
For producing same product,the structure of steel mold is more complicated and are more hard to be made,so the steel mold takes more machining cost and machining time.On the contrary,aluminum mold is more easy to machining and takes less machining cost.
4.The mirror polishing property of tool.
The mirror polishing property of steel mold is better than aluminum mold.