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Dongguan Yiyongli Industrial Co.,Ltd. [Guangdong,China] Business Type:Manufacturer , Trade Company Main Markets: Americas , East Europe , Europe , North Europe , Other Markets , Worldwide Exporter:41% - 50% Certs:ISO9001, REACH, RoHS

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The difference of blowing process and vacuum forming process

2023-09-11

The blowing process and Vacuum Forming process are both methods used to shape plastic materials, but they differ in several ways:

1. Principle: The blowing process involves inflating a heated plastic sheet or parison with air pressure to conform to the shape of a mold cavity, while the vacuum forming process uses vacuum pressure to draw a heated plastic sheet onto a mold surface.

2. Equipment: The blowing process typically requires a blow molding machine, which consists of a blow mold and a blow pin, while the vacuum forming process requires a vacuum forming machine, which includes a mold and a vacuum system.

3. Material Thickness: The blowing process is suitable for producing hollow plastic products with relatively uniform wall thickness, such as bottles and containers, while the vacuum forming process is more suitable for producing flat or shallow plastic parts with varying thicknesses, such as trays, packaging, and automotive interior components.

4. Complexity: The blowing process is generally used for producing more complex shapes with intricate details, as it allows for the creation of internal features like handles and threads. On the other hand, the vacuum forming process is better suited for simpler shapes with fewer intricate details.

5. Production Volume: The blowing process is often used for high-volume production due to its fast cycle times and ability to produce multiple parts simultaneously in a single mold. In contrast, the vacuum forming process is more commonly used for low to medium volume production.

6. Cost: The blowing process typically requires more expensive molds and machinery, making it more costly to set up and operate compared to the vacuum forming process, which can be relatively cheaper and more accessible.

Overall, the choice between the blowing process and vacuum forming process depends on the specific requirements of the desired plastic product, including its shape, complexity, volume, and cost considerations.

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