Method for producing vacuum by utilizing waste steam of expansion plastic forming machine

A molding machine and waste steam technology, applied in the field of vacuum manufacturing, can solve problems such as energy waste and achieve the effect of saving energy

Inactive Publication Date: 2006-05-03
梁志强
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Problems solved by technology

The disadvantage of the above process is that the waste steam that enters the mold for he

Method used

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  • Method for producing vacuum by utilizing waste steam of expansion plastic forming machine

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Embodiment

[0011] The waste steam discharge pipe 2 on the mold 1 of the expanding plastic molding machine is introduced into the vacuum tank 4 . The vacuum tank 4 is a sealed pressure-resistant steel plate container. The top of the vacuum tank 4 is provided with a cooling water spray pipe 6 and a vacuum gauge 18 , the side of the vacuum tank 4 is provided with a vacuum pipe 8 , and the bottom of the vacuum tank 4 is provided with a drain pipe 14 . The vacuum tube 8 of the vacuum tank 4 is connected to the vacuum tube 10 of the mold 1 of the expansion plastic molding machine. The vacuum pipes 12 of each vacuum tank 4 are connected to the total vacuum tank 13 which reserves the vacuum. Plastic particles are injected into the mold 1 of the expanding plastic molding machine, and the steam at about 120°C produced by the boiler enters the mold 1 of the expanding plastic molding machine from the steam inlet pipe 15, so that the plastic particles are melted, expanded, and expanded into strong a...

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Abstract

The invention provides a method for attaining vacuum by waste steam of plastic molding presser, which imports exhaust tube of waste steam of expanded plastic molding presser into vacuum chamber. The top of vacuum chamber has a cooling-water injection pipe and a vacuum meter, while its top part or side edge has a vacuum pipe and the bottom part has a water exhaust tube. The vacuum pipe of vacuum chamber is connection to the expanded plastic molding presser. The steam is imported into expanded plastic molding presser, and the exhaust steam is imported into vacuum chamber, then injecting cooling-water to the vacuum chamber to reduce the volume of its waster, to attain the vacuum inside the vacuum chamber. The water of expanded plastic product in the mould can be sucked into vacuum chamber via vacuum pipe. With said invention, the water steam of expanded plastic molding presser can be used secondary, while it can produce vacuum replacing the vacuum pump to save the power.

Description

technical field [0001] The invention relates to a method for manufacturing vacuum, in particular to a method for manufacturing vacuum by utilizing waste steam of an expanding plastic molding machine. Background technique [0002] In the process of manufacturing expanded plastic products, the expanded plastic molding machine injects plastic particles into the mold of the molding machine, and undergoes heating, expansion, molding, cooling, vacuum and other technological processes. Among them, the heating medium is steam. The boiler produces steam at about 120 ℃ into the mold, so that the plastic pellets are rapidly expanded and formed, and then water is injected into the mold to cool the product, and then the vacuum created by the vacuum pump is used to extract the water content of the product in the mold. The disadvantage of the above process is that the waste steam after the steam entering the mold for heating is discharged, still has a temperature a...

Claims

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Application Information

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IPC IPC(8): B29C44/34B29C44/58
Inventor 梁志强
Owner 梁志强
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