• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to methods for ensuring quick setting of cement in slabs and profiles containing fibrous materials with cement in the binder. In order to simplify the process, reduce carbon dioxide consumption in the manufacture of fiber products in the method of manufacturing plates and profiles, including the preparation of a mixture of cement in a binder, filler and water, feeding the mixture into the mold, pressing, carbonization with carbon dioxide and subsequent pressure relief during the pressing process along the perimeter of the plate or profile, the edge is formed with a higher density of material than in the middle. Land is molded with more effort than the middle. The peripheral part of the plate or profile is formed from a mixture with a greater than in the middle amount of fibrous material. Pressing is carried out with a force that provides a smaller volume of the preform than the predetermined one, and after the supply of carbon dioxide, the pressure is partially reduced to obtain a predetermined volume of the preform. The plates are carbonized for 3.5-4 minutes. Carbon dioxide consumption is equal to 8–10% by weight of cement added to the fibrous material. 1 sec. and 3 z. p. f-ly, 6 ill.
    公开号:SU1664116A3
    申请号:SU864003181
    申请日:1986-01-10
    公开日:1991-07-15
    发明作者:Шмидт Ерне
    申请人:Ньугатмадьярорсаги Фагаздашаши Комбинат (Инопредприятие)；
    IPC主号:
    专利说明:

    about oh
    The invention relates to methods for the manufacture of plates and profiles containing fibrous materials with cement in a binder. The method provides quick cement setting.
    The purpose of the invention is to simplify the process, reducing the consumption of carbon dioxide in the manufacture of fibrous products.
    The invention is based on the fact that the lateral closing of the plates (and thus creating a closed space inside the fibrous material) can be accomplished using the fibrous material itself based on the properties of the cement-containing fibrous material, namely as follows.
    On the edges of the product being manufactured, cement-containing fibrous material is compressed on all four sides in the form of a collar stronger than the specified thickness of the product. Compression is carried out using a flange mounted on a press press plate.
    On the edges of the product being manufactured, a greater quantity of fibrous material is metered on all its four sides, as a result of which, after pressing,
    about

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    up to a given thickness, a zone of material with a higher density is obtained.
    In any of the described solutions, the cement-containing fibrous material acquires a greater density at the edges and its gas permeability becomes less than in the middle part of the products. With a proper choice of the density of the material, it is precisely such a gas tightness that is necessary for carbonization to be decimated.
    Figure 1 shows the press in the open state: the flange is mounted on the press plate of the press; physical and mechanical characteristics of the open state of the press; 2 shows a press in a closed state: the flange is mounted on a press plate of the press; the physical and mechanical characteristics of the press under compression; FIG. 3 shows a semi-finished product with an increased dosage of fibrous material in the form of a collar when the press is open; Fig. 4 shows a semi-finished product with an increased dosage of fibrous material in the form of a collar when the press is closed; figure 5 - means of example 1; figure 6 - the means of example 2.
    The invention is illustrated by the following examples.
    Example 1. The pressure plates 1 and 2 are structural elements of a hydraulic press. The pressure plate 2 is moved up and down by means of the hydraulic cylinder of the press. Inside these pressure plates, holes 3 are provided in the longitudinal and transverse directions, with which other holes 4 communicate perpendicularly to the surface of the pressure plate 1, 2. Two holes 3 of the pressure plate 1 are provided with valves 5 and 6. Holes 3 of the pressure plate 2 are connected to another valve 7. Wet cement containing fibrous material is fed through a plate 8 into the space between the press plates of the press. Plate 8 on all four sides in a strip several centimeters wide does not have perforations, the rest of plate 8 is often perforated in the form of a sieve. The said non-perforated strip serves on both sides for compaction and is characterized by the appropriate quality and processing of the material from which it is made.
    The cement-containing fibrous material to be pressed is loaded onto the slab 8. As mentioned, the edges on the four sides are metered
    more fibrous material. Under the action of a press, the loose fibrous material is compressed. Compressed air escapes from the pores of the fibrous material.
    through valve 5. Cement-containing fibrous material receives a voltage directed against the action of compressive force, and acts on the pressure plate of the press with a corresponding recoil force, as a result of which a gas-tight condition occurs near the surface of the pressure plate. When the fibrous material is compressed by a press to the desired final volume, the valves 5 are closed. In this state
    5, two plates of fibrous material are closed by the press plates of the press, and from the sides of the plate they become gas-tight. thanks to the edge, which has a greater density. Now open valve 7 and
    0 CO 2 gas through plate 8 enters the cement-containing fibrous material 9. The air remaining in the pores of the fibrous material is forced out with an overpressure gas through the pressure plate 1, resulting in carbonation conditions. After the carbonization process is completed, it is possible to introduce water vapor into the cement-containing fibrous material or, possibly, water through valve 4 with the aim of complete and reliable hydration.
    Example 2. The pressure plates 1 and 2 are structural elements of a hydraulic press. Pressure plate 2
    5 is moved upward and downward by means of the hydraulic cylinder of the press, the pressure plate 1 is fixed. Inside the pressure plate 1 are provided in the longitudinal and transverse directions of the hole
    0 10, which communicate with other holes 11, passing perpendicularly to the surface of the pressure plate 1. Two holes 10 inside the pressure plate 1 are provided with valves 5 and 6. The pressure plate 2 does not have any holes. Wet cement containing fibrous material is loaded onto plate 8, with which it is fed into the space between the press plates of the press.
    0 Plate 8 on its four sides in a 3–4 cm wide strip has no perforations, the rest of plate 8 is often perforated in the form of a sieve.
    The specified unperforated strip
    5 serves on both sides for compaction and is characterized by the appropriate quality and processing of the material from which it is made.
    Wet cement-based fibrous material to be pressed 9
    loaded onto plate 12. On the four sides of plate 12 — beneath the non-perforated surface of plate 8 — about 10–15% more material is loaded.
    Under the influence of a hydraulic press, the fibrous material is compressed. When compressed, air escapes from the pores of the fibrous material. Mentioned, the addition of 10-15% of the material provides for a greater volumetric weight, which leads to the formation of a collar, which serves as a seal for further processing. The air displaced during pressing enters the perforated part of the plate 8 through the openings of the pressure plate 1 through the open valve 5.
    The fibrous material is compressed to a smaller volume than its final target volume should be. In this case, fewer pores are contained in the fibrous material between the pressure plates than in the state after reaching the final volume. The force of the pressure plates of the press is balanced by the relaxation pressure of the fibrous material.
    After the valve 6 is opened, the CO gas enters the openings 10 and 11 of the pressure plate 1. The air remaining in the aforementioned holes is forced out by C02 gas through the valve 5. After the C02 gas is finished washing, the valve 5 is closed and the hydraulic pressure of the piston of the press decreases so could open and as a result, it would be possible to unclench the fibrous material and the acquisition by the plate of its final technological dimensions. Due to relaxation, airless pores are formed inside the fibrous material, which is easily penetrated by CO 2 gas. The influx of C02 gas can be enhanced by increasing its pressure to 15-20 at.
    Carbonization of a plate with a thickness of 10 mm is carried out for 3.5-4 minutes, and the preliminary strength of cement-containing fibrous material reaches 45-50% of its 28-day strength. The CO2 gas consumed during the chemical process is 8-10% by weight of the cement added to the fibrous material.
    The proposed method has the following advantages.
    The method is carried out without the use of additives to the molding mixture. The extrusion device 5 does not require the use of rubber-like materials, they are replaced by densely perforated mesh natural or artificially formed gas-permeable porous layers.
    10 Gas treatment is carried out before the temperature of the molding sand is increased by 40-60 ° C in comparison with the original. In carrying out the method, a system preventing the removal of moisture is not required. Forming mixtures may include not only inorganic, but also organic or artificially made organic aggregates, as well as other types of cements. The removal process from the press is carried out by means of a perforated mesh medium in which the mixture is molded. The carbonization reaction is carried out in a press only until the product is self-holding and dimensioned.
    权利要求:
    Claims (4)
    [1]
    1. A method of manufacturing plates and profiles by preparing a mixture of cement binder, filler and water, feeding the mixture into a pressing form, carbonizing with carbon dioxide and then relieving pressure, characterized in that, in order to simplify the process, to reduce carbon dioxide consumption during the manufacture fiber products in the process
    5 pressing on the perimeter of the plate or profile forms a bead with a higher density of material than in the middle.
    [2]
    2. A method according to claim 1, characterized in that the rim is molded with a greater degree of pressing than the middle.
    [3]
    3. A method according to claim 1, characterized in that the peripheral part of the plate or profile is molded from a mixture with a greater than in the middle amount of fibrous material.
    [4]
    4. The method according to claims 1 to 3, from l and h and y and y with the fact that the pressing lead with a force that provides a smaller amount of workpiece than the specified, and after the supply of carbon dioxide
    0, the pressure is partially reduced to obtain a predetermined volume of the workpiece.
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    类似技术:
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    同族专利:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU85260A|HU189455B|1985-01-23|1985-01-23|Method for quick solidifying cement at plates and shapes containing fibrous materials and glued by cement|
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