Thin walled container molding is one of the types of molding technique which is used for the purpose of food packaging. It has a wide impact all around the world, it is very popular and also has a huge market in various parts of many countries either it is rural or urban. This method employs a wide range of injection molds for thin walled packaging and also for making containers for food and other usages. Depending upon the requirement of the customer the design may be varied. The variation of design does not mean changes in the structure of the machine but it represents the change in number of cavities present in the machine. Nowadays almost all Closure Molding Suppliers prefer this type of molding technique. They are preferred due to various advantages present in them. There are certain types of technologies involved in this type of molding technique they are

1.         Hot or High Temperature runner type injection with value gates.

2.         Technology of label and over molding.

3.         Hot or High Temperature runner type sequential injection.

4.         Vegetal and material injection.

There are certain difficulties in this method of molding which has to be overcome by the Closure Molding Suppliers. In general at the time of the injection molding there are more possibilities where the walls of the material output may be uneven in its thickness either the walls may be thick or thin. Thus it needs a high speed or velocity and an high pressure injection in it. Due to this reason the machine will be bigger than the general purpose machine it is not because of mold or higher injection weight but due to higher or more injection pressure. The clamping force must also be higher. Thus by following these steps we can overcome the problems in this method of molding. There also certain other conditions involved in this method they are the dimension of the mold should be in controlled precession .To be in controlled precession we can use very high speed milling machine and many other precession machine tool for tooling it. There are certain sub systems present in this method they are the ejector system and cooling system. At first, regarding the ejector system for making thin wall container mold we must use atmospheric air to blow at first where it helps the container not to stick in the core and they also use double plate ejector which is driven by the hydraulic cylinder which is used to eject the product of the mold. The cooling systems is also very important because in molding we need very high speed and enormous amount of  pressure which in turn causes or produce enormous amount of heat or temperature. Hence it is important to control the heat produced thus we are using this cooling system. Thus the certain step involved in Thin Walled Container Molding process is explained in detail above.

The plastics are used everywhere for different purpose. But the major application of plastic product is bottled and containers. The plastic containers are used to store gas and other chemicals like alkaline solutions, etc.. But the plastic bottles are used for filling purified drinking water and available to the market as the on demand packed drinking water. As the population increases day by day, the usage of plastic containers and bottles are also increased. This increase of usage is due to the plastic’s characteristics such as light in weight, reusability, durability and recyclable. There  are many grades or ranks of plastics based on its number of recycling process underwent.

The important part of plastic container product is the cap, which is used to open and close the container. Since there is available in different sizes of the plastic containers, need of different sizes of caps becomes important. Based on the container’s neck diameter, the cap size will be small, medium or large. The plastic caps designed by plastic injection molding machines. The number of caps manufactured can be increased by developing more cavities in the cap mold. But the more caps with different sizes can also be manufactured by using custom cap molds. The cavities in the mold can be developed by using lathe machines. The metal like stainless steel is used to cast the mold since they withstand a longer lifetime. The raw material for cap molding are thermoplast and polyethylene. Both the raw materials are mixed by equal propositions and blended. The mixture is fed to the plastic injection machine for the manufacturing process.

Different colors for the cap is also brought by adding color granules along with the feedstock. The feed stock is melted by heating it to 270?C using induction heaters constructed around the injection cylinders. The injection cylinders are designed in a volume that is sufficient to inject to the cap mold. The size of the injection cylinder varies for different custom cap molds used for manufacturing. The ultra cooling system is used to cool the mold. The water is used as the coolant and it is circulated internally around the mold. The advanced machines are more faster in production which takes 0.86 seconds to compress the mold and 2 seconds to cool the mold and 0.96 seconds to open the mold and ejecting the product out. The custom cap molds have the cavities for different cap sizes in a single mold. These molds have the interior mechanical designs which can expand the cavity for large size caps and converge the cavity for smaller size cap. This expansion and convergence mechanism is supported by the embedded systems. The embedded system is the programmable computers that control the process we desire.

The caps manufactured are put under series of tests to meet its specifications and its quality. These test are associated with the testing of its strength , withstanding of external temperature, internal threading structure and its size that fit correct to the container.

About Author:

This article is written by SINOPK which is a leading PET Preform Molding and carved out a special reputation in closure molds, Thin Walled Container Molding , China Preform Mould Maker , Closure Molds and PET Preform Moulds of the highest quality at a low and suitable price. For more, Visit http://www.preform-mold.com/Plastic_bottle_cap_molds_237.htm .