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Vacuum extrusion low-temperature drying process and equipment for pulp molding

A pulp molding and vacuum extrusion technology, applied in the dryer section, papermaking, papermaking and other directions, can solve the problems of macular plugging and other problems, and achieve the effect of avoiding macular macula, reducing thermal energy consumption, creating conditions, and reducing thermal energy consumption.

Active Publication Date: 2011-02-09
上海英正辉环保设备有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide pulp molding vacuum extrusion low-temperature drying process and equipment, and solve the problem of macular hole plugging on the premise of reducing energy consumption

Method used

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  • Vacuum extrusion low-temperature drying process and equipment for pulp molding
  • Vacuum extrusion low-temperature drying process and equipment for pulp molding
  • Vacuum extrusion low-temperature drying process and equipment for pulp molding

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Embodiment Construction

[0015] figure 1 with figure 2 The structural schematic diagrams of the implementation of the two parts of the blank forming part and the hot pressing drying and shaping part are respectively shown. Such as figure 1 with figure 2 As shown, both the first mold body 1 and the second mold body 3 are included in the implementation schematic diagram of the paper-making part of the pulp molding and the heat-pressing drying and shaping part. The first mold body is provided with a heating element 2, the second mold body 3 is provided with a mold cavity 11, and the entire inner wall of the mold cavity 11 of the second mold body 3 is provided with drainage holes that can pass through the vacuum negative pressure mold cavity 7 6. A wire mesh layer 5 is laid on the cavity 11 . Also shown in the figure is the parison 4 that is covered on the top of the wire mesh 5 and that has been sheet-formed. exist figure 2 A heating element 8 is also arranged on the second mold body 3 of the s...

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Abstract

The invention relates to a vacuum extrusion low-temperature drying process and vacuum extrusion low-temperature drying equipment for pulp molding. The process comprises the following steps of: vacuum low-temperature extrusion deep dehydration at a blank forming stage during the pulp forming, and vacuum low-temperature extrusion drying and shaping at subsequent hot pressing, drying and shaping stages. The process is characterized in that: the step of vacuum low-temperature extrusion deep dehydration at the blank forming stage during the pulp molding can ensure that a wet green body at a forming stage is dehydrated under the condition of vacuum suction and in a low-temperature extrusion environment, and generates a small amount of low-temperature vapor to further remove water in the wet green body and around the wet green body so as to fulfill the aim of deep dehydration and create conditions for efficiently avoiding yellow spots generated on molded pulp products and plugged holes on a forming die body and greatly reducing heat consumption during drying and shaping at the subsequent molding process stages; and the step of vacuum low-temperature extrusion drying and shaping at the subsequent hot pressing, drying and shaping stages can ensure that the products are dried and shaped by hot pressing under the condition of vacuum suction and in a lower temperature environment, so thatthe thermal energy consumption is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a pulp molding drying process and equipment. Background technique [0002] Pulp molded products made of annual herbaceous plant fiber as the main raw material meet the needs of modern society for sanitation, convenience, speed and health. With the characteristics of being practical, non-toxic, completely degradable after being discarded, and returning to nature, It has a broad development prospect, so the pulp molding industry is an environmental protection industry that is conducive to the sustainable development of social economy. However, the paper molding industry is still a new industry, and there are still many places to be perfected and improved in the molding and processing technology of its products. [0003] The paper molding industry is similar to the papermaking industry. Its molding process has several stages of pulp preparation, molding dehydration, and drying and setting. However, paper molding production is dif...

Claims

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Application Information

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IPC IPC(8): D21F5/14
Inventor 沈瑾琪
Owner 上海英正辉环保设备有限公司
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