Different Processes in Moulding Rubber


Different Processes in Moulding Rubber

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There are a whole lot of reasons why people opt to using rubbers in their products. Because of this, many manufacturers have attempted in creating moulded rubber products, such as the ones created by Daewoong rt Co., ltd. After all, rubber is a very flexible material. And it can have many uses. As end users, we may only think that moulding rubber is just completed by one process, and produces only one result.

However, reality dictates that there are multiple, different types of rubber moulding processes. In the end, the process is completed and beautiful mould rubber items are created. Example of an item made from rubber moulding is puzzle mats, among others.

There are generally three types of processes in moulding rubber. The first is done through injection moulding. In this process, an injection machine is used. Rubber is placed in the machine’s nozzle assembly continually. The type of rubber used is one with high consistency silicone, which is also called as ‘Gum Stock’. To put the gum stock inside the injection barrel, a pressurized device which is called a stuffing box is used. The heated mould is closed while pressure is applied. This is to keep the mould closed during the curing and the injection phase. A screw in the machine injects the gum stock through the nozzle and through the mould. The process continues with the gum stock travelling inside the machine through sprues and runners and through a gate, entering the mould cavities. The packs are filled and the cavities create the shape of the item desired. When the cure phase is completed, the rubber is then removed from the mould.

Another process is called the compression moulding. By far, this is the simplest way of thermal set moulding. The output from a compression mould usually varies in size, shape, as well as its complexity. The number of cavities also differs. The process starts with the preform of an uncured rubber. Before closing the mould, the uncured rubber is placed to the mould cavity. During the entire moulding process, the rubber is squeezed between two plates. Then, the rubber undergoes vulcanizing or curing, this time with the use of heat and pressure. The end results are called moulded rubber products.

The third process is done by transfer moulding. Like the other processes, the end product may also differ in size, shape or complexity. The number of cavities may also differ, depending on some factors. The process starts with the uncured rubber placed in a pot called ‘transfer pot’. This pot is located just above the area of the cavity. Then, with the use of a Piston, the rubber goes through a series of system: Runner, Sprue, and the Gate system. Vulcanizing or curing is done afterwards, with the use of heat and pressure. This type of process is somewhat similar to the first one because the rubber is placed inside the cavity after closing the mould. This process may also prove to be less expensive compared to the other two processes.

Mike Funes invites you to take a look at Daewoongrt Co Ltd. The rubber undergoes vulcanizing or curing, this time with the use of heat and pressure. The end results are called Moulded Rubber Products .



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