Injection molding of plastic containers and lids

The injection molding machine is composed of three parts, the clamping unit, injection and a cooling system. Inside the control panel you can set parameters such as speed, pressure, temperature and times, which are critical in the process for the production of parts with the requested quality.


How does injection molding work?

The first thing is to place the resin in the hopper, this will enter the injection system to start the melting or heating process, the temperature is generated by friction of the screws and the walls of the barrel, the second is that it has a heating bands that heats the resin to the desired consistency. Once the right temperature has been reached, the molten plastic is placed in front of the screws to be injected into the mold. Previously the machine must be cleaned to avoid contamination of the new parts at the time of injection.

First it is necessary that the mold is closed, both the pressure and the speed are controlled so that it is injected correctly, once the resin has been injected the mold remains closed so that the water coming from the cooling system solidifies the piece and can be expelled.


What parts does it work for?

Generally the raw materials used in injection molding are HDPE and PP, both are resins that are particularly chosen for making tubs, containers, large containers and bottle caps. In our case the vast majority of our lids and drums are manufactured using this process.


I need to buy containers

It is true that injection molding is widely used, however, there is also the blow molding process, used mainly for PET bottles. Regardless of the manufacturing process, what is important is that all containers undergo the necessary quality tests to ensure that they are suitable for use in the various industries.

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