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Device and method for preparing fiber reinforced silica sol composite shell through airflow laying

A technology of fiber reinforcement and silica sol, which is applied in the direction of molds, cores, and mold components, etc., can solve problems such as uneven fiber mixing, uneven fiber distribution, and reduced strength, so as to improve filling ability and simple operation OK, improve the effect of air permeability

Inactive Publication Date: 2018-06-29
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the document CN 103962506 B, the adding method of fiber is to mix in the paint, and after making the paint, dip-coat it on the pattern to make the shell. There will be uneven fiber mixing, entanglement, etc.; second, the fibers are wetted and agglomerated in the coating, and it is impossible to achieve complete uniform distribution through stirring. When the agglomerated fibers are made into a shell, it will cause Uneven distribution of shell properties and reduced strength after firing; Third, due to the uneven distribution of fibers in the coating, the uneven distribution of fibers at different positions in the container will eventually cause the fibers of the same batch of shells to be produced The content is different, and there is a huge difference in performance; fourth, for fibers with a large aspect ratio, this kind of fiber is added to the shell by mixing the coating, and the fibers are prone to problems such as agglomeration and clustering, which seriously affects the quality of the fiber. The uniformity of fiber distribution will cause the instability of the shell performance; fifth, the addition of fibers to the coating will affect the rheological properties and viscosity of the coating, especially when the amount of fiber added is relatively large. The rheological properties and viscosity and other process properties have a very significant impact

Method used

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  • Device and method for preparing fiber reinforced silica sol composite shell through airflow laying
  • Device and method for preparing fiber reinforced silica sol composite shell through airflow laying
  • Device and method for preparing fiber reinforced silica sol composite shell through airflow laying

Examples

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Embodiment 1

[0050] The device for preparing fiber-reinforced silica sol composite shells by airflow laying in this embodiment includes a fiber laying chamber 2, a fiber storage chamber 13, an air supply unit and a support 8; the fiber laying chamber 2 is composed of four side vertical plates It is in the shape of a hollow cube formed with an upper bottom surface exhaust hole plate 1, and the upper bottom surface exhaust hole plate 1 is provided with an exhaust hole 14, and the fiber laying chamber 2 is equipped with a container for carrying the molded shell sample 3. Rotating shaft 3; the fiber storage chamber 13 is a hollow inverted quadrangular truss shape made up of four side panels and a lower bottom surface air intake hole plate 16, and a fiber storage rack 6 is installed in the fiber storage chamber 13. The fiber storage rack 6 is provided with an airflow guide hole 7; the fiber laying room 2 is located directly above the fiber storage room 13, and the side length of the side vertica...

Embodiment 2

[0056]The method for preparing fiber-reinforced silica sol composite shells by using the device for preparing fiber-reinforced silica sol composite shells by airflow laying in Example 1, the device for preparing fiber-reinforced silica sol composite shells by airflow laying includes fiber laying chamber 2, fiber Storage chamber 13, air supply unit and support 8; the fiber laying chamber 2 is a hollow cube shape composed of four side vertical plates and an upper bottom exhaust hole plate 1, and the upper bottom surface exhaust hole plate 1 There is an exhaust hole 14 on the top, and the rotating shaft 3 for carrying the shell sample 3 is installed in the fiber laying room 2; the fiber storage room 13 is composed of four side panels and a lower bottom air intake orifice plate 16 is a hollow inverted square prism shape, the fiber storage room 13 is equipped with a fiber storage rack 6, and the fiber storage rack 6 is provided with an air flow guide hole 7; the fiber laying room 2 ...

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Abstract

The invention discloses a device and a method for preparing a fiber reinforced silica sol composite shell through airflow laying. The device comprises a fiber laying chamber, a fiber storage chamber,an air supply unit and a support, wherein the fiber laying chamber is a hollow cube and is composed of four side vertical plates and an upper bottom surface exhaust hole plate and an upper bottom surface exhaust hole plate, and an exhaust hole is formed in the upper bottom surface exhaust hole plate; a rotating shaft used for bearing the shell sample is installed in the fiber laying chamber; the fiber storage chamber is of a hollow inverted quadrangular frustum shape formed by four side plates and a lower bottom surface air inlet plate, a fiber storage rack is arranged in the fiber storage chamber, and airflow guide holes are formed in the fiber storage rack; and the fiber spreading chamber is located right above the fiber storage chamber, the side length of the side vertical plate of thefiber spreading chamber is equal to the side length of the side plate of the fiber storage chamber, and the four side vertical plates and the four side plates are fixedly connected in a one-to-one correspondence manner. According to the device and the method, the fibers can be uniformly distributed in the shell, the fibers can be laid on the shell in a quantitative mode, so that the performance ofthe prepared shell is consistent, and the fiber with the large length-diameter ratio can also be added into the shell.

Description

technical field [0001] The present invention relates to an investment pattern apparatus for casting. More specifically, it relates to a device and method for preparing a fiber-reinforced silica sol composite shell by air laying. Background technique [0002] In the production of investment casting, it is generally required that the shell has a high enough wet strength to prevent the shell from cracking during handling or dewaxing; high temperature strength to prevent the shell from cracking during roasting and casting; low residual strength to make the casting Easy to clean up. [0003] Silica sol shells have the disadvantages of low wet strength, slow drying, and long shell-making cycle. People usually adopt methods such as improving the shell-making process, using multiple adhesives to harden alternately, and accelerating the drying rate of the shell to promote the silica sol shell. Builds wet strength quickly. However, these methods often have limited enhancement effec...

Claims

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Application Information

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IPC IPC(8): B22C9/04
CPCB22C9/04
Inventor 李艳芬刘向东吕凯路焱刘琦
Owner INNER MONGOLIA UNIV OF TECH
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