阅读说明：本技术 一种维管束纤维无胶胶合三维型体热压工艺 (Hot-pressing process for gluing three-dimensional body of vascular bundle fiber without glue ) 是由 徐云杰 胡晓军 管珣 于 2020-04-24 设计创作，主要内容包括：本发明提供一种维管束纤维无胶胶合三维型体热压工艺,步骤如下：将三维型体拆分成接近平面的平板块,各平板块相接处设置有交叉部；将竹维管束打散、计量、加占竹维管束纤维重量8％-10％水调湿、干燥去除纤维表面残余水；然后按拆分后的平板块形状进行铺装；分别在模具中压制,使竹维管束纤维半定型即可；将半定型的平板块组合拼装后,放入三维模具中,再次在各平板块的交叉部适量喷水,使得交叉部的纤维有分解松散迹象即可,模具合模进行热压,热压完成后,冷却成型,即得三维型体。本发明能够改善现有竹维管束纤维因流动性差而无法三维成型的问题,以及材质本身的导致的热压成型时容易出现开裂、局部发黑和变形等问题；同时,采用无胶胶合,更加环保。(The invention provides a hot-pressing process of a glue-free gluing three-dimensional body of a fiber bundle, which comprises the following steps: splitting the three-dimensional body into flat plate blocks close to a plane, wherein a crossing part is arranged at the joint of the flat plate blocks; scattering bamboo fiber bundles, measuring, adding water accounting for 8-10% of the weight of the fibers of the bamboo fiber bundles for humidifying, and drying to remove residual water on the surfaces of the fibers; then paving the split flat plate block; respectively pressing in a mould to semi-shape the bamboo fiber bundle; and (3) assembling and splicing the semi-shaped flat plates, putting the assembled flat plates into a three-dimensional mold, spraying water at the crossing parts of the flat plates in a proper amount again to enable fibers at the crossing parts to be decomposed and loosened, performing hot pressing by mold assembly, and cooling and molding after the hot pressing is finished to obtain the three-dimensional molded body. The invention can solve the problems that the prior bamboo fiber bundle fiber can not be formed in three dimensions due to poor fluidity and the problems of cracking, local blackening, deformation and the like easily occur during hot press forming caused by the material; meanwhile, the glue-free gluing is adopted, so that the environment is protected.)

1. A hot-pressing process for a glue-free gluing three-dimensional body of a fiber bundle is characterized by comprising the following steps of: the process comprises the following steps:

step 1, splitting: splitting the three-dimensional body into flat plates close to a plane or flat plates with small folded edges according to the shape characteristics, wherein the joint of the flat plates is provided with a crossing part;

step 2, preparing materials: scattering bamboo fiber bundles, measuring, adding water accounting for 8-10% of the weight of the fibers of the bamboo fiber bundles for humidifying, and drying to remove residual water on the surfaces of the fibers; then paving the split flat plate block, wherein the crossing part close to the edge is slightly thin, and the thickness is based on the integral uniformity of the flat plate block after the two crossing parts are overlapped;

step 3, semi-sizing: respectively pressing the paved bamboo fiber bundles in a mould to semi-shape the bamboo fiber bundles; the die pressing parameters were as follows: the semi-setting temperature is 90-110 ℃, and the forming pressure is 10-15 MPa;

step 4, combining and shaping: assembling and splicing the semi-shaped flat plates, putting the assembled flat plates into a three-dimensional mold, spraying water at the crossing parts of the flat plates in a proper amount again to enable fibers at the crossing parts to be decomposed and loosened, performing hot pressing by mold assembly, and cooling and molding after the hot pressing is finished to obtain a three-dimensional molded body; wherein the hot pressing parameters are as follows: the hot-pressing setting temperature is 185-.

2. The heat pressing process of the non-glue gluing three-dimensional body of the vascular bundle fiber as claimed in claim 1, which is characterized in that: the length of the fiber of the bamboo fiber bundle in the step 2 is 300-500 mu m.

3. The heat pressing process of the non-glue gluing three-dimensional body of the vascular bundle fiber as claimed in claim 1, which is characterized in that: the die pressing parameters in the step 3 are as follows: the semi-setting temperature is 100 ℃, and the forming pressure is 12 MPa.

4. The heat pressing process of the non-glue gluing three-dimensional body of the vascular bundle fiber as claimed in claim 1, which is characterized in that: the hot pressing parameters in the step 4 are as follows: the hot-press setting temperature is 190 ℃, the loading load is 20MPa, and the loading time is 10 min; and cooled in air for more than 30 minutes.

5. The process according to any one of claims 1 to 4, wherein the process comprises the following steps: the mould in the step 3 and the step 4 is a metal mould.

6. The heat pressing process of the non-glue gluing three-dimensional body of the vascular bundle fiber as claimed in claim 1, which is characterized in that: adding a proper amount of saccharides and acids extracted from natural plants into the bamboo vascular bundle in the step 2.

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of bamboo application, in particular to a hot-pressing process of a glue-free gluing three-dimensional body of vascular bundle fibers.

[ background of the invention ]

At present, a lot of substantive progress is made in the technical field of glue-free gluing at home and abroad in the field of boards, but the field of dimensional products is still at the beginning stage, the usage amount of three-dimensional products in the industrial field is far more than that of the boards, and the development and utilization of bamboo fiber three-dimensional products open up a new direction for the deep processing of bamboo wood. Benz, BMW, southeast automobile and the like have already applied the bamboo fiber composite material to automobile interior ornaments. The glue-free gluing of bamboo has an example of successful production at home and abroad, but has not been widely popularized, and the main reason is that the problems which are difficult to overcome exist in the aspects of production process, operation technology, product performance, economic benefit and the like. Therefore, it is urgent to develop products that can meet the requirements of service performance and meet the standards of environmental protection performance.

Bamboo fibers taking bamboo fiber bundles as main components are called bamboo fiber bundle fibers, but the bamboo fiber bundle fibers have poor fluidity and have certain difficulty in three-dimensional forming, and a formed body is easy to crack, blacken locally, deform and the like during one-time hot press forming; at present, the research also lacks theoretical support of a self-adhesive gluing mechanism of the system, and no proper solution is found at present. The invention provides a method for manufacturing a glue-free gluing three-dimensional forming body by using bamboo fiber bundles as raw materials and adopting a metal mold segmented semi-hard hot pressing process.

[ summary of the invention ]

The invention aims to solve the technical problems that the hot pressing process of the gluing-free three-dimensional body of the fiber bundle can solve the problems that the existing bamboo fiber bundle fiber cannot be three-dimensionally formed due to poor fluidity and the problems of cracking, local blackening, deformation and the like easily occur during hot pressing forming caused by the material per se; meanwhile, the glue-free gluing is adopted, so that the environment is protected.

The invention is realized by the following steps:

a hot-pressing process for a glue-free gluing three-dimensional body of a fiber bundle comprises the following steps:

step 1, splitting: splitting the three-dimensional body into flat plates close to a plane or flat plates with small folded edges according to the shape characteristics, wherein the joint of the flat plates is provided with a crossing part;

step 2, preparing materials: scattering bamboo fiber bundles, measuring, adding water accounting for 8-10% of the weight of the fibers of the bamboo fiber bundles for humidifying, and drying to remove residual water on the surfaces of the fibers; then paving the split flat plate block, wherein the crossing part close to the edge is slightly thin, and the thickness is based on the integral uniformity of the flat plate block after the two crossing parts are overlapped;

step 3, semi-sizing: respectively pressing the paved bamboo fiber bundles in a mould to semi-shape the bamboo fiber bundles; the die pressing parameters were as follows: the semi-setting temperature is 90-110 ℃, and the forming pressure is 10-15 MPa;

step 4, combining and shaping: assembling and splicing the semi-shaped flat plates, putting the assembled flat plates into a three-dimensional mold, spraying water at the crossing parts of the flat plates in a proper amount again to enable fibers at the crossing parts to be decomposed and loosened, performing hot pressing by mold assembly, and cooling and molding after the hot pressing is finished to obtain a three-dimensional molded body; wherein the hot pressing parameters are as follows: the hot-pressing setting temperature is 185-.

Further, the fiber length of the bamboo fiber bundle in the step 2 is 300-.

Further, the die pressing parameters in the step 3 are as follows: the semi-setting temperature is 100 ℃, and the forming pressure is 12 MPa.

Further, the hot pressing parameters in step 4 are as follows: the hot-press setting temperature is 190 ℃, the loading load is 20MPa, and the loading time is 10 min; and cooled in air for more than 30 minutes.

Further, the mold in the step 3 and the step 4 is a metal mold.

Further, a proper amount of saccharides and acids extracted from natural plants are added to the bamboo vascular bundle in the step 2.

The invention has the following advantages:

the invention adopts sectional type shaping, namely, the bamboo fiber bundles are paved into a plurality of flat plates, and after low-temperature semi-shaping treatment, high-temperature hot-pressing shaping treatment is carried out; the chemical components, the structure and the like of the bamboo fiber bundle basically do not change after the low-temperature semi-sizing treatment, but the uniform feeding of the fibers of the three-dimensional body at the inclined plane and the bending part is ensured, and meanwhile, the problem of poor flowability can be solved by arranging the overlapped crossed parts at the joint of each flat plate block. The invention adds water into the bamboo fiber bundle fiber and then carries out hot pressing and shaping, and the bamboo fiber bundle fiber can generate the following reaction: the hydrogen bond function among cellulose molecules can be enhanced; secondly, reacting the hemicellulose hydrolysis product to generate a polycondensation furan resin; thirdly, condensing the furfural compound with lignin to generate a compound similar to phenolic resin; fourthly, the lignin is spread, evenly distributed and subjected to condensation reaction to generate crosslinking effect; thereby carrying out self-gluing and bonding to form a three-dimensional molded body. When the complex forming of the three-dimensional shape is considered, a small amount of saccharides and acids extracted from natural plants can be added to improve the self-adhesive performance.

The invention can solve the problems that the prior bamboo fiber bundle fiber can not be three-dimensionally molded due to poor fluidity and the problems of cracking, local blackening, deformation and the like easily occur during hot press molding caused by the material; meanwhile, the invention adopts glue-free gluing, thus being more environment-friendly.

[ description of the drawings ]

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic view of a complete three-dimensional model in the example.

Fig. 2 is a schematic diagram of the three-dimensional molded body split into three flat plate blocks in the embodiment.

Fig. 3 is a front view of the three flat panels of fig. 2.

[ detailed description ] embodiments

The invention relates to a hot-pressing process of a glue-free gluing three-dimensional body of a fiber bundle, which comprises the following steps:

step 1, splitting: splitting the three-dimensional body into flat plates close to a plane or flat plates with small folded edges according to the shape characteristics, wherein the joint of the flat plates is provided with a crossing part;

step 2, preparing materials: scattering bamboo fiber bundles, measuring, adding water accounting for 8-10% of the weight of the fibers of the bamboo fiber bundles for humidifying, and drying to remove residual water on the surfaces of the fibers; then paving the split flat plate block, wherein the crossing part close to the edge is slightly thin, and the thickness is based on the integral uniformity of the flat plate block after the two crossing parts are overlapped;

step 3, semi-sizing: respectively pressing the paved bamboo fiber bundles in a mould to semi-shape the bamboo fiber bundles; the die pressing parameters were as follows: the semi-setting temperature is 90-110 ℃, and the forming pressure is 10-15 MPa;

step 4, combining and shaping: assembling and splicing the semi-shaped flat plates, putting the assembled flat plates into a three-dimensional mold, spraying water at the crossing parts of the flat plates in a proper amount again to enable fibers at the crossing parts to be decomposed and loosened, performing hot pressing by mold assembly, and cooling and molding after the hot pressing is finished to obtain a three-dimensional molded body; wherein the hot pressing parameters are as follows: the hot-pressing setting temperature is 185-.

The length of the fiber of the bamboo fiber bundle in the step 2 is 300-500 mu m.

The die pressing parameters in the step 3 are as follows: the semi-setting temperature is 100 ℃, and the forming pressure is 12 MPa.

The hot pressing parameters in the step 4 are as follows: the hot-press setting temperature is 190 ℃, the loading load is 20MPa, and the loading time is 10 min; and cooled in air for more than 30 minutes.

The mould in the step 3 and the step 4 is a metal mould.

Adding a proper amount of saccharides and acids extracted from natural plants into the bamboo vascular bundle in the step 2.

The present invention will be further described with reference to the following examples.