阅读说明：本技术 一种碳纤维毡及其二元法制毡工艺 (Carbon fiber felt and binary method felt preparation process thereof ) 是由 张永福 于 2019-10-22 设计创作，主要内容包括：本发明涉及一种碳纤维毡及其二元法制毡工艺。所述二元法制毡工艺包括如下步骤：将碳纤维预氧丝依次进行蒸汽卷曲、短切、喷洒抗静电剂、开松,得短切碳纤维预氧丝；通过二元控制模块将短切碳纤维预氧丝依据碳纤维毡预设的密度、幅宽、厚度、丝径及X、Y、Z向碳纤维丝的比例换算成频率；将换算出的频率通过控制器分发给喂料、道夫、锡林、铺网、底帘和针刺的变频装置,各变频装置控制以上各工序部件将短切碳纤维预氧丝制成碳纤维毡。所述二元法控制模块能够精确控制碳纤维毡的密度、厚度值及X、Y、Z向丝的分配比例,且经过检测后碳纤维毡密度及厚度方差均较小,从而使碳纤维毡的结构及尺寸更为稳定。密度、厚度更加均匀一致,以满足不同需要。(The invention relates to a carbon fiber felt and a binary method felt preparation process thereof. The binary process for preparing the felt comprises the following steps: sequentially carrying out steam curling, short cutting, antistatic agent spraying and opening on the carbon fiber pre-oxidized fibers to obtain short carbon fiber pre-oxidized fibers; converting the chopped carbon fiber pre-oxidized fiber into frequency according to the preset density, breadth, thickness and fiber diameter of the carbon fiber felt and the proportion of X, Y, Z to the carbon fiber yarn by a binary control module; and distributing the converted frequency to frequency conversion devices for feeding, doffers, cylinders, lapping, bottom curtains and needling through a controller, wherein each frequency conversion device controls the above process parts to prepare the chopped carbon fiber pre-oxidized fibers into the carbon fiber felt. The binary method control module can accurately control the density and the thickness value of the carbon fiber felt and the distribution proportion of X, Y, Z to the filaments, and the density and the thickness variance of the carbon fiber felt are small after detection, so that the structure and the size of the carbon fiber felt are more stable. The density and the thickness are more uniform and consistent so as to meet different requirements.)

1. A binary process for preparing felt is characterized by comprising the following steps:

(1) sequentially carrying out steam curling, short cutting, antistatic agent spraying and opening on the carbon fiber pre-oxidized fibers to obtain short carbon fiber pre-oxidized fibers;

(2) converting the chopped carbon fiber pre-oxidized fiber obtained in the step (1) into frequency according to the preset density, breadth, thickness and fiber diameter of the carbon fiber felt and the proportion of X, Y, Z to the carbon fiber;

(3) and (3) distributing the frequency converted in the step (2) to frequency conversion devices for feeding, doffing, cylinder, lapping, bottom curtain and needling through a controller, and controlling the process parts to prepare the chopped carbon fiber pre-oxidized fiber obtained in the step (1) into a carbon fiber felt by the frequency conversion devices.

2. The binary process for manufacturing the felt according to claim 1, wherein in the step (2), the preset density of the carbon fiber felt is 720-1500 g/m²(ii) a The preset width of the carbon fiber felt is 1500-1800 mm.

3. The binary process for manufacturing the felt according to claim 1, wherein in the step (2), the preset thickness of the carbon fiber felt is 5-10 mm.

4. The binary process for manufacturing the felt according to claim 1, wherein in the step (2), the preset filament diameter of the carbon fiber felt is 1.5-3 d.

5. The binary process for preparing felt according to claim 1, wherein in the step (2), the preset proportion of X, Y, Z fibers in the carbon fiber felt is 3-4: 2-3: 3-4.

6. The binary process for making felt according to claim 1, wherein in the step (3), the feeding speed is 0.4-0.6 m/min; the rotating speed of the doffer is 250-300 r/min.

7. The binary process for making felt according to claim 1, wherein in the step (3), the rotating speed of the cylinder is 25-30 r/min; the weight of the lapping is 180-250 g/m²。

8. The binary process for making felt according to claim 1, wherein in the step (3), the speed of the bottom curtain is 0.4-0.6 m/min.

9. The binary process for making felt according to claim 1, wherein in the step (3), the needling density is 110-150 punches/cm²The frequency of needling is 200-240 needling/min.

10. A carbon fiber mat produced by the process of any one of claims 1 to 9.

Technical Field

The invention belongs to the field of carbon fiber felt making, and particularly relates to a carbon fiber felt and a binary method felt making process thereof.

Background

The prior felting process has more flows and is sequentially divided into feeding, opening, feeding, carding, lapping, pre-needling, needling down, needling up and coiling. However, the setting of feeding, carding, lapping and needling frequency is completed by the experience of the operator, and even the operator with the most experience can not make the felting completely consistent every time, and the distribution proportion of the yarns in the X, Y and Z directions is not controllable.

Further exploration is needed to make the size and structure of the carbon fiber felt more stable.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a carbon fiber felt and a binary method felt preparation process thereof. The binary method can accurately control the density and the thickness value of the carbon fiber felt and the distribution proportion of X, Y, Z to the filaments, and after detection, the density and the thickness variance of the carbon fiber felt are small, so that the structure and the size of the obtained carbon fiber felt are more stable.

The scheme of the invention is to provide a binary method felt preparation process, which is characterized by comprising the following steps:

(1) sequentially carrying out steam curling, short cutting, antistatic agent spraying and opening on the carbon fiber pre-oxidized fibers to obtain short carbon fiber pre-oxidized fibers;

(2) converting the chopped carbon fiber pre-oxidized fiber obtained in the step (1) into frequency according to the preset density, breadth, thickness and fiber diameter of the carbon fiber felt and the proportion of X, Y, Z to the carbon fiber;

(3) and (3) distributing the frequency converted in the step (2) to frequency conversion devices for feeding, doffing, cylinder, lapping, bottom curtain and needling through a controller, and controlling the process parts to prepare the chopped carbon fiber pre-oxidized fiber obtained in the step (1) into a carbon fiber felt by the frequency conversion devices.

Preferably, in the step (2), the preset density of the carbon fiber felt is 720-1500 g/m²(ii) a The preset width of the carbon fiber felt is 1500-1800 mm.

Preferably, in the step (2), the preset thickness of the carbon fiber felt is 5-10 mm.

Preferably, in the step (2), the preset filament diameter of the carbon fiber felt is 1.5-3 d.

Preferably, in the step (2), the preset proportion of X, Y, Z to the filaments of the carbon fiber felt is 3-4: 2-3: 3-4.

Preferably, in the step (3), the feeding speed is 0.4-0.6 m/min; the rotating speed of the doffer is 250-300 r/min.

Preferably, in the step (3), the rotating speed of the cylinder is 25-30 r/min; the weight of the lapping is 180-250 g/m²。

Preferably, in the step (3), the speed of the bottom curtain is 0.4-0.6 m/min.

Preferably, in the step (3), the needling density is 110-150 punches/cm²The frequency of needling is 200-240 needling/min.

Based on the same technical thought, the invention also provides the carbon fiber felt prepared by the process.

The invention has the beneficial effects that:

the binary method felt preparation process can accurately control the density, thickness, width and yarn diameter value of the carbon fiber felt and the distribution proportion of X, Y, Z to yarns, and after detection, the density and thickness variance of the carbon fiber felt are small, so that the structure and size of the obtained carbon fiber felt are more stable.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.