For those of us who don’t know much about the relation between temperature and liquid silicone rubber moulding well, you’ve come to the right place. In this post, we are going to outline the cooling rates of manufacturing and its effects on a moulded product.

In the production sector, liquid silicone rubber moulding is the process of the creation of a new product/part. The product is not finished until its finally released from the mould; the mould is usually quite hot after the casting of the rubber mould, which usually comes after the end of the production cycle.

The cooling rate is the time taken by the molten plastic to reach the mould until the last cavity of the moulded is filled.

The cooling system used in liquid silicone rubber moulding 

At Nice Rapid, we employ an industry-wide standard when it comes to cooling. Most manufacturing plants use two methods when it comes to the cooling procedure; they are:

Chemical cooling 

The system might sound complicated, but it’s far from it, the system used two ingredients: water and ethylene glycol. The two ingredients are, in turn, fed through hoses placed over the production machines.

This is one of the most popular methods of liquid silicone molding.

Air cooling  

The system technique is quite straightforward as cold air is used to slow down the heat of the mold. It’s the slowest of the two processes, but it’s very effective; hence it’s used in the production of expensive and delicate machined parts/products.

Factors that affect the cooling rate of the silicone rubber mould

The cooling rate is one of the most vital factors in any manufacturing process; if a part/product is not cooled correctly, it can result in defects and imperfections.

Here are a few factors that can affect the cooling rates of your product.

The pressure of cavity mold

The cooling rate should be closely monitored at all times; the calibrations should clearly show the pressure curve of the temperature used to cool the mould.

Monitoring mould temperature 

In liquid silicone rubber molding, the mould’s temperature will affect the cooling rate in every step of the production process. The cooling lines function based on the temperature registered by the sensors and provide solutions based on automatic readings. 

Wear resistance 

After cooling, you can easily handle your part/product. With proper timing, you can minimize wear resistance; it’s always recommended to know everything about this particular issue.

There is an extensive list of aspects or factors which affect the cooling rate in silicone rubber moulding. Some problems might arise as a result of the tropes in manufacture like Sink marks, warpage, Molded-in Stress Mold, Molecular Weight, Resistance Jetting, Fatigue, Dimensional stability, and Creep Resistance to mention a few.

Having deep insights into cooling rates, especially in liquid silicone moulding, is very important as it brings a myriad of benefits as it will improve your outcome.

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