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Vacuum Forming Process

Vacuum forming process can be roughly divided into five steps: material sheet production, mold production, vacuum forming, CNC cutting, post-processing.

The first process is the production of material sheet. Put the raw material granular plastic into the heating machine, heat evenly, plasticize, and then through rolling, cooling and flattening, forming the sheet.

Actually, the mold is made at the same time as the material sheet. Making mold drawings according to 3d drawings provided by customers, purchase mold materials/aluminum materials, shape the blank, and then enter the mold machine for engraving. This process is controlled by computer. After the completion of the mold, mold engineers will process the surface of the mold — grinding, polishing and so on.

Then after the mold is made, the prepared mold and material sheet will be transferred to the thermal forming workshop. The pre-prepared material sheet is softened at high temperature in a thermoforming machine, and the mold is mounted on the chassis for some preliminary work. The vacuum forming process needs several rounds of temperature adjustment to meet the temperature requirements. In general, different materials have different temperature requirements and different heating times. During the vacuum forming process, the thermal forming engineer will perform at least three rounds of temperature adjustment until the optimum temperature is reached to control the thickness, surface condition and shape of the product.

After vacuum forming process, we will use CNC machine to cut the extra parts of the semi-manufactured, to achieve the final shape we need.

However, after CNC cutting, the edges of the product will be very sharp and we need to trim the edges manually to make them rounded and smooth to avoid harm to the skin. Therefore, the product will be transferred to the packaging department for deburring, cleaning, assembling, packing and inspecting work.

Ok, the above introduction is the whole process of vacuum forming process. Hope this article can make you have some understanding of vacuum forming process. thanks for reading~

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