30results about How to "Reduce drying difficulty" patented technology

The invention provides a drying process of gelcasting large-sized and complex-shaped silicon carbide ceramic biscuit, which belongs to the field of ceramic drying technology and solves the shortcomings of easily cracking of and deformation of green bodies by adopting the existing ceramic wet green drying process. The process provided by the invention firstly prepares liquid ethanol and deionized water into drying solution with different concentration, then puts the SiC wet green into the bottom of a drying tank, respectively adds drying solution obtained by the step one into the drying tank for soaking to obtain the contracted SiC green body, and finally puts the contracted SiC green body in a drying oven for drying. The drying process provided by the invention greatly reduces the drying difficulty of large-sized and complex-shaped SiC biscuit, and achieves the non-defect drying of 1.5m-magnitude SiC ceramic biscuit prepared by a gelcasting process.

The invention discloses a preparation method of waterborne polyurethane synthetic leather Bayse and applications of the waterborne polyurethane synthetic leather Bayse, belonging to the technical fields of the synthetic leather and the preparation method. The preparation method comprises the following steps: (1) preparing a bottom cloth; (2) impregnating the bottom cloth, wherein, the impregnation prescription contains the following components in parts by weight: 100 parts of water and 1-10 parts of metal nitrade, and the liquid rate of the impregnated bottom cloth is 10-30%; (3) heating, ironing, pressing, polishing and baking the bottom cloth after impregnating; (4) coating a waterborne polyurethane foaming layer on the bottom cloth after baking; (5) obtaining the synthetic leather Bayse after common baking, pressing and polishing. According to the preparation method, the defects of fussy operation, heavy pollution and drying difficulty in the existing preparation process of the waterborne polyurethane synthetic leather Bayse are overcome; one-time impregnation prescription and process, which are free of pollution, low in liquid rate after impregnation, and easy to bake are provided; meanwhile, a synthetic leather product taking the waterborne polyurethane synthetic leather Bayse as a base cloth is also provided; the preparation method is high in efficiency, and the obtained product is good in performance.

The invention discloses a high-content high-universality talcum powder master filler and production equipment and a method thereof. The talcum powder master filler is prepared by 90 to 98 parts of talcum powder, 1 to 2 parts of stearate, 1 to 3 parts of sodium silicate and 3 to 5 parts of water. The content of talcum powder of the master filler can reach 90% to 95%, a great quantity of energy for fusion and plasticization is saved, production cost of the master filler is reduced greatly, and the problem of high-temperature operation environments caused by high temperature equipment is solved. Talcum powder filling content is high, and adding content of the master filler is low in subsequent use, so that adding cost of the master filler is reduced, universality of the talcum powder master filler is realized thoroughly. Since the talcum powder master filler prepared by the method contains no plastic resin, the problem about consistency of matrix during subsequent use can be ignored, and the high-content high-universality talcum powder master filler can be widely added and used in various talcum powder filling modified plastic products.

The present invention relates to the technical field of animal husbandry, in particular to a pasture grading and drying system, which includes a grading conveying device, the grading conveying device includes an auger, and the auger includes a cylinder, a rotating shaft arranged in the cylinder, and a rotating shaft arranged on the rotating shaft. The helical blade on the upper side of the cylinder is provided with a strip-shaped gap along the direction of the generatrix of the cylinder. The pasture grading conveying device also includes a pasture cutting device and a first hot air device. The first hot air device is used to move toward the The blowing hole on the rotating shaft blows hot air, and a material receiving trough whose length matches the long strip-shaped notch is also arranged under the long strip-shaped notch of the cylinder. A drying device is also arranged under one end. The drying system of this application realizes the distinction between leaves and stalks of forage grass, avoids the risk of mildew in forage grass storage caused by uneven drying, and reduces the waste of forage grass and the occurrence of young animals eating stalks in the current feeding work. Adverse conditions such as indigestion.

The invention provides a chip box cleaning device and method, which relate to the field of semiconductor wafers. The chip box cleaning device includes: a cavity, including a cleaning chamber and a drying chamber; an isolation plate, located inside the cavity, and the isolation plate has a closed state In the open state, in the closed state, it is used to isolate the cleaning chamber and the drying chamber, in the open state, the cleaning chamber and the drying chamber are connected; the film box bracket is located inside the cavity, and is used to carry the film box; mechanism, the film cassette support is arranged on the driving mechanism, and the driving mechanism can drive the film cassette support to move between the cleaning chamber and the drying chamber, and can drive the film cassette support to rotate. The embodiment of the present invention effectively solves the problems of large occupied area, high cost and low drying efficiency of the existing film cassette cleaning machine.

The invention provides a drying method for gel injection molding SiC ceramic impeller wet blanks. Aiming at the problems that the ceramic impeller wet blanks are easy to crack and deform in the initial drying stage in the gel injection molding process, it is proposed to use polyethylene glycol The method of drying the wet impeller with the drying liquid and supporting the wet impeller with an inert hard tray. In this method, a high-concentration polyethylene glycol drying liquid is firstly configured, and then the wet impeller and the inert support tray are immersed in the drying liquid to complete the second stage. Dry in the first stage, and then put it into a constant temperature and constant humidity drying box to complete the second stage of drying. Adopting this method makes the drying environment milder, the green body is dried evenly and thoroughly, and defects such as cracking and deformation of the green body caused by gravity and drying stress are avoided. The method is simple in operation, low in cost, short in production cycle and high in efficiency, greatly reduces the difficulty of drying large-sized impellers, and prepares large-sized impellers with a diameter of more than 350 mm.

The present invention relates to the technical field of animal husbandry, in particular to a method for grading and drying pasture grass, comprising the following steps: Step 1, pasture harvesting: including the first harvest and the second harvest, the first harvest being: during the theoretical harvest period of pasture In the first 20‑30 days, harvest the upper part of the pasture; after the first harvest, irrigate and fertilize; the second harvest is: cut off all the pasture 30‑40 days after the first harvest, step 2, dry the pasture , drying the pasture obtained from the first harvest to obtain pasture grass for young livestock, grading the pasture grass harvested the second time, separating the leaves and stems of the pasture grass, and then drying the leaves and stems respectively, and drying the leaves to obtain pasture grass for young livestock, After the stalks dry, they can be independently used as pasture grass for adult livestock. The method of the present application realizes the graded drying of forage grass; moreover, by adopting the method of two harvests, more grass is produced, and the proportion of leaves is larger, so it is easier to obtain high-quality pasture grass for young livestock.

The invention relates to the technical field of anti-corrosion plates, in particular to a preparation method of the anti-corrosion plate. By the selection and the proportion design of raw material components of anti-corrosion liquid, when a base plate is placed in the anti-corrosion liquid for soaking, harmful bacteria on the surface of the base plate can be effectively killed, and the anti-corrosion liquid can penetrate into the base plate to prevent the interior of a wood board from being eroded by worms; then tung oil is brushed onto the base plate, so that the surface layer of the base plate can be prevented from being soaked by water; furthermore, by the soaking in the anti-corrosion liquid and the control over the moisture content in a drying process, the shortcomings of rotting due to excessive moistening of the wood board and relatively low toughness and easiness in deformation due to over drying of the wood board are avoided; and therefore, the prepared anti-corrosion plate is higher in performance and attractive in appearance.

The invention provides a preparation method of an aerogel composite thermal insulation material. The method comprises the following steps: (a), mixing a silicon source, hexamethyl-disilazane, a pH regulator and a solvent; (b), soaking a silica sol precursor solution obtained through mixing into a magnesium silicate fiber felt, and leaving the solution to stand, so as to obtain a wet gel felt body;(c), soaking the wet gel felt body into 40 to 90 DEG C organo-siloxane, and then performing microwave drying, so as to obtain the aerogel composite thermal insulation material. The method has the advantages that purification, ageing, solvent exchange and alkylation treatment of the wet gel felt body can be synchronously realized by soaking the wet gel felt body formed in the step (b) into an organo-siloxane solution on the basis of the improvement of a precursor solution formula, so that the preparation period of a material is greatly reduced, the drying difficulty of the material can be further reduced through the treatment, and the materials can be rapidly dried under normal pressure through subsequent microwave drying, in addition, chlorine ion is not introduced during the material preparation, so that corrosion to adopted equipment is small.

The invention discloses a counter-current extraction method for stevia rebaudian, which comprises the following steps: (1) using a cyclone separator for separating and removing light impurities from stevia rebaudian, using a wind power stone remover for removing heavy impurities, crushing stems and then performing multi-level counter-current extraction; (2) in a multi-level counter-current extraction process, extracting the materials at each level and then squeezing water; performing next level of extracting and squeezing on the squeezed material, returning the water squeezed at each level and extracting at the level; (3) in the multi-level counter-current extraction process, using new solvents as all the extraction agents for the latest level extraction; taking extract liquor generated from each level of extraction as the extract liquor for the superior extraction; obtaining the extraction liquor generated from level-1 extraction as final extraction liquor of stevia rebaudian. According to the invention, the pretreatment operation is performed for ensuring the basic constant characters of the materials for extraction and ensuring the stability of the subsequent production. Meanwhile, a multi-level squeezing system is added in the multi-level counter-current extraction system, so that the water consumption is reduced, energy consumption is reduced and the yield of the products is increased.

The present invention relates to the technical field of animal husbandry, in particular to a pasture grading conveying device, which includes an auger, and the auger includes a cylinder body, a rotating shaft arranged in the cylinder body, and a helical blade arranged on the rotating shaft. Both ends of the cylinder are also provided with sealing plates, and the sealing plates are provided with bearings for supporting the rotating shaft. A feed hopper is provided on the upper side of the side wall at one end of the cylinder, and the lower side wall of the other end is A discharge port is provided on the side, and a strip-shaped notch along the direction of the generatrix of the cylinder is provided on the lower side of the cylinder. The width of the strip-shaped notch is 1 / 4 to 3 / 4. In this application, the diameter of the forage stalk is the diameter of the middle part of the forage stalk at the mature stage. The grading conveying device of the present application realizes the separation of the stem segment and the leaf, and when the stem segment passes through the gap, the stem breaks, so it also greatly facilitates the subsequent work of drying the stem segment.