Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of high-density rotary acupuncture preform

A preform and rotary technology, which can be used in needle looms, textiles, papermaking, nonwovens, etc. It can solve the problems of low density and interlayer connection performance of needle felt, unsatisfactory high cost, and long production cycle.

Active Publication Date: 2019-01-22
无锡云日智能科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the density and interlayer connection performance of the needle-punched felt prepared by the net tire plus needle punching process in the prior art are on the low side; although the long fiber integral weaving process can meet the density and interlayer connection performance requirements, the Due to the long preparation period and high cost that cannot meet the demand for mass products, a method for preparing high-density rotary needle-punched preforms is proposed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of high-density rotary acupuncture preform
  • A kind of preparation method of high-density rotary acupuncture preform
  • A kind of preparation method of high-density rotary acupuncture preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of high-density quartz fiber, uncapped conical tubular acupuncture preform: outer diameter of large end Φ320, inner diameter of large end Φ300, outer diameter of small end Φ220, inner diameter of small end Φ200, height H300mm, thickness is compressed; fiber volume The percentage content is 40%±1%. , it is known that the thicknesses of the quartz mesh cloth and the quartz plain cloth are 0.18mm and 0.22mm respectively, and the surface densities of the quartz plain cloth and the quartz mesh cloth are 198 g / m 2 and 100 g / m 2 . The preparation steps are as follows:

[0045] (1) According to the volume formula of the uncapped cone tube, the volume of the cone-shaped needle-punched preform is 2451cm³, and the density of the cone tube is 0.88g / cm3 calculated based on the fiber volume content of 40%. 3 , the weight of the conical tube is 2156g, and the conical tube is cut and unfolded along the longitudinal section, the area of ​​the fan platform is , and the cal...

Embodiment 2

[0050] Preparation of high-density quartz fiber-capped hollow cone needle-punched preform: the outer diameter of the large end is Φ520, the inner diameter of the large end is Φ500, the height is H500, and the thickness is compressed; the fiber volume content is 40% ± 1%, and the known quartz mesh The thicknesses of the grid cloth and the quartz plain cloth are 0.18mm and 0.22mm respectively, and the surface densities of the quartz plain cloth and the quartz mesh cloth are 198 g / m respectively 2 and 100g / m 2 . The preparation steps are as follows:

[0051] (1) According to the volume formula of the capped hollow cone, the volume of the cone is 2671cm³, and the density of the cone is 0.88g / cm3 calculated according to the fiber volume content of 40%. 3 , the weight of the cone is 2350g, if the cone is cut and expanded along the longitudinal section, the fan-shaped area is, and the calculated value is 0.295m 2 (The area value is the outermost surface area of ​​the cone product)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A method for preparing a high-density rotary needle-punched preform, comprising the following steps: (1) a mandrel (20) is wrapped with an isolation felt (30); Prepare the unit layer (80) of corresponding shape; (3) wrap the unit layer (80) outside the isolation felt (30) and fix it by random needle punching with three needles (50); (4) uncapped rotary pre- The molded body (40) is needled as a whole with a horizontal needling machine with three rows of needles (90) along the direction of the generatrix, then rotated by a step and then needled; Cut into fan-shaped and lotus-shaped, superimpose alternately with the top as the center, first use the needling head (50) of 3 needles to needle from the top to the bottom one by one, and change to 7 needles or even 18 needles after reaching a certain thickness Prick the head (50) until the thickness requirement is reached. The rotary needle-punched preform (40) prepared by the invention has high density, high interlayer connection strength and complex shape, and can be applied to high-temperature filtration and heat-resistant composite materials.

Description

technical field [0001] The invention relates to a method for preparing a rotary needle-punched preform, in particular to a method for preparing an uncapped or capped, high-density needle-punched preform, and belongs to the technical field of fiber aggregates. Background technique [0002] At present, special-shaped preforms such as tapered tubes, semicircles, pyramids, and concave-waisted pyramids are widely used in the field of high-temperature anti- and heat-insulating composite materials. As composite reinforcements, special-shaped preforms play a role in improving their performance Key role. The preparation process of the reinforced preform currently in use is divided into two categories: the mesh tire and cloth needle punching forming process, and the fixed-length fiber weaving forming process. The use of net tire plus needle punching technology solves the problem of rapid and low-cost manufacturing, but its bulk density and interlayer connection strength are low, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29B11/14D04H18/02
CPCD04H18/02B29B11/14B29C49/071B29C2949/0715
Inventor 蒋云陈美琴
Owner 无锡云日智能科技有限公司