Back press injection material process method
A material injection and back pressure technology, applied in the direction of presses, manufacturing tools, etc., can solve problems such as the inability to take into account the injection time, complex machine structure, juice oxidation, etc., and achieve the effect of shortening the pressing cycle
Inactive Publication Date: 2005-03-02
CHINA AGRI UNIV
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Problems solved by technology
[0002] At present, the injection and pressing of the barrel press are generally carried out independently, that is, the injection is not pressed or the material is not injected during the extrusion, and sometimes the material is fed under negative pressure, so that the time of injection and pressing cannot be taken into account, and the negative pressure feeding causes The backflow of the air will cause problems such as the oxidation of the juice. If the cavity is filled with inert gas, the structure of the machine will be complicated and the cost will be high.
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[0012] The invention relates to a back pressure injection pressing method. The back pressure injection squeezing method uses a cylindrical juicer with a squeezing cavity 4 consisting of an end cover 6, a squeezing cylinder 2 and a piston 3 installed in the squeezing cylinder 2, and the material is squeezed by the injection in the center of the end cover 6. The port 7 injects into the squeeze chamber 4 . The so-called back pressure injection pressing method is to set up a retreat resistance for the piston 3 during the material injection process, and the pressing material can push the piston back after overcoming the resistance. Its back pressure injection pressing process is composed of 3-5 unit processes, and the setting values of the 3 pressure parameters are different in each unit process; the setting values of the 3 pressure parameters are gradually changed from small to small during the pressing unit process. To large ones, the order is 0.1Mpa, 0.5Mpa, 1Mpa or 1.5Mpa....
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The back pressure material injection pressing method adopts one barrel type pressing machine comprising end caps, pressing cylinder and piston inside the cylinder, and the back pressure material injection pressing process consists of 3-5 unit processes. Specifically, in the first unit process, pressed material with pressure is fed with a material conveying pump into the pressing cavity while pressure is maintained in the no-rod cavity of the pressing oil cylinder; after the piston is withdrawn to set position, pressure is applied to the no-rod cavity for pressing; the piston moves forward to set position to enter the second unit process; and so on. During the back pressure material injection pressing process, the piston is provided with one back resistance for the pressed material to overcome and the material injection and pressing are performed simultaneously to short the pressing period, reduce material replenishing times, avoid the contact of pressed material with air and reduce oxidation of the pressed material.
Description
technical field [0001] The invention belongs to the technical scope of squeezing juice, and in particular relates to a back pressure injection squeezing method. Background technique [0002] At present, the injection and pressing of the barrel press are generally carried out independently, that is, no pressing or no injection during the injection, and sometimes negative pressure feeding, so that the injection and pressing cannot be taken into account in time, and the negative pressure feeding causes The backflow of the air will cause problems such as the oxidation of the fruit juice. If the cavity is filled with inert gas, the structure of the machine will be complicated and the cost will be high. Contents of the invention [0003] The object of the present invention is to provide a back pressure injection pressing method, which is characterized in that: the back pressure injection pressing method uses an end cover 6, a pressing cylinder 2 and a piston 3 installed in the p...
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Inventor 张绍英
Owner CHINA AGRI UNIV