阅读说明：本技术 一种石墨裸模压延的制备方法 (Preparation method of graphite bare die calendering ) 是由 于学军 陶龙 徐贵芳 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种石墨裸模压延的制备方法,属于石墨材料技术领域。本发明通过石墨化发泡好的石墨膜卷材固定于延压机前端气胀轴上,管芯安装在后端收料气胀轴上,然后将石墨物料展开穿过压延机上两根压辊进行延压30~50cm后裁断,测量产品厚度达到要求后,继续压延1~5m,将产品导入后端收料气胀轴上,根据产品宽度用双面胶居中垂直贴于管芯上,用胶带固定后进行压延收料即可制成石墨膜。本发明可以减少异常的产生,降低制造成本,提高生产效率的需求,更好的达到降本增效的目标。(The invention discloses a preparation method for graphite bare die calendering, and belongs to the technical field of graphite materials. The graphite film roll material which is well graphitized and foamed is fixed on a front-end air expansion shaft of a rolling machine, a tube core is arranged on a rear-end material receiving air expansion shaft, then a graphite material is spread to pass through two compression rollers on a rolling machine to be rolled for 30-50 cm and then cut, after the thickness of a product is measured to meet the requirement, the product is continuously rolled for 1-5 m, the product is guided into the rear-end material receiving air expansion shaft, is vertically pasted on the tube core in the middle by using a double faced adhesive tape according to the width of the product, and is rolled and received after being fixed by using an adhesive tape, so that the graphite film. The invention can reduce the generation of abnormity, reduce the manufacturing cost, improve the requirement of production efficiency and better achieve the aims of cost reduction and efficiency improvement.)

1. A preparation method for graphite bare die calendering is characterized in that: the method comprises the following specific steps:

the first step is as follows: fixedly mounting, adjusting the air expansion shafts at the two ends of the calender, fixing the graphitized and foamed graphite film coiled material on the air expansion shaft at the front end of the calender, and mounting the tube core on the material receiving air expansion shaft at the rear end;

the second step is that: setting a pressure value and calendering parameters, setting an initial pressure value of an initial calender, spreading the graphite material to pass through two compression rollers on the calender, and calendering after setting the calendering parameters;

the third step: measuring the thickness, cutting the product after the rolling, and measuring the thickness of the product by using a ten-thousandth micrometer;

the fourth step: rolling and receiving materials, after the thickness of the product meets the requirement, continuously rolling, and guiding the rolled product onto a rear-end material receiving air expansion shaft for rolling and receiving materials;

the fifth step: winding the film, winding the pressed finished product for a plurality of circles by using the winding film, and sticking a label.

2. The method for preparing graphite by bare die calendering according to claim 1, characterized in that: the initial pressure value range of the second-step initial calender is as follows: 1-4 Mpa, and the calendering range is as follows: 30-50 cm.

3. The method for preparing graphite by bare die calendering according to claim 2, characterized in that: the initial pressure value of the primary calender is 2.5Mpa, and the calendering time is 40 cm.

4. The method for preparing graphite by bare die calendering according to claim 1, characterized in that: the tolerance thickness range of the product thickness measured in the third step is as follows: 10% -20%.

5. The method for preparing graphite by bare die calendering according to claim 4, characterized in that: the tolerance thickness is 15%.

6. The method for preparing graphite by bare die calendering according to claim 1, characterized in that: and step four, continuously rolling for 1-5 m, pasting a double-sided adhesive tape in the center of the product, vertically pasting the double-sided adhesive tape on the tube core, fixing the double-sided adhesive tape with an adhesive tape, and rolling and collecting the material.

7. The method for preparing graphite by bare die calendering according to claim 6, characterized in that: the rolling was performed for 3 m.

8. The method for preparing graphite by bare die calendering according to claim 1, characterized in that: the winding film is wound for 1-2 circles.

Technical Field

The invention relates to the technical field of graphite materials, in particular to a preparation method for graphite bare die calendering.

Background

The high heat conduction characteristic of the artificially synthesized graphite film meets the heat dissipation requirement of products in the electronic industry, the use range of the artificially synthesized graphite film is wider and wider, various assemblies are used more and more, the production and delivery management and control of the graphite film are particularly important, the delivery part of the graphite film in the first few years basically uses a release film or a low-viscosity protective film as a bottom supporting film for delivery, and because the release film and the protective film are treated by a sizing agent on the surface of PET or PE, the viscosity of the sizing agent can change after a long time and exceeds the standard range of the sizing agent, the graphite film is separated from or adhered to the release film, the release film or the low-viscosity protective film cannot be stripped well, adverse effects are generated, and waste is caused; by using the carrier film production process, if static electricity of the release film or the protective film cannot be effectively eliminated, bubbles are generated in the calendering process, and the defects are brought to subsequent production.

Therefore, a method for preparing a graphite film is desired in the art, and the method can reduce the generation of abnormalities, reduce the manufacturing cost, improve the production efficiency and better achieve the aims of cost reduction and efficiency improvement.

Disclosure of Invention

The technical problem to be solved by the invention is to produce a preparation method of a graphite film, and the preparation method can reduce the generation of abnormity, reduce the manufacturing cost, improve the production efficiency and better achieve the aims of cost reduction and efficiency improvement.

In order to solve the technical problems, the invention adopts the following scheme: a preparation method for graphite bare die calendering comprises the following specific steps:

the first step is as follows: fixedly mounting, adjusting the air expansion shafts at the two ends of the calender, fixing the graphitized and foamed graphite film coiled material on the air expansion shaft at the front end of the calender, and mounting the tube core on the material receiving air expansion shaft at the rear end;

the second step is that: setting a pressure value and calendering parameters, setting an initial pressure value of an initial calender, spreading the graphite material to pass through two compression rollers on the calender, and calendering after setting the calendering parameters;

the third step: measuring the thickness, cutting the product after the rolling, and measuring the thickness of the product by using a ten-thousandth micrometer;

the fourth step: rolling and receiving materials, after the thickness of the product meets the requirement, continuously rolling, and guiding the rolled product onto a rear-end material receiving air expansion shaft for rolling and receiving materials;

the fifth step: winding the film, winding the pressed finished product for a plurality of circles by using the winding film, and sticking a label.

As a further scheme of the present invention, the range of the initial pressure value of the second-step primary calender is as follows: 1-4 Mpa, and the calendering range is as follows: 30-50 cm.

As a further proposal of the invention, the initial pressure value of the primary calender is 2.5Mpa and the initial pressure value is 40 cm.

As a further aspect of the present invention, the tolerance thickness range of the third step for measuring the thickness of the product is: 10 to 20 percent.

As a further aspect of the invention, the tolerance thickness is 15%.

And as a further scheme of the invention, the fourth step of continuously rolling for 1-5 m, wherein a double-sided adhesive tape is pasted in the center of the product and is vertically pasted on the tube core, and the product is rolled and collected after being fixed by an adhesive tape.

As a further aspect of the invention, the calendering is 3 m.

According to a further aspect of the present invention, the winding film is wound for 1 to 2 turns.

The invention has the advantages and positive effects that: due to the adoption of the technical scheme, the invention can reduce the generation of abnormity, reduce the manufacturing cost, improve the requirement of production efficiency and better achieve the aims of cost reduction and efficiency improvement.

Drawings

Fig. 1 is a schematic view of graphite on a protective film.

Fig. 2 is a schematic view of graphite on a protective film.

Fig. 3 is a schematic view of graphite on a release film.

Fig. 4 is a schematic view of excess air bubbles on a release film.

Fig. 5 is a schematic view of excess air bubbles on a release film.

Fig. 6 is a schematic view of excess air bubbles on a release film.

Fig. 7 shows release film attaching bubbles.

Fig. 8 shows release film attaching bubbles.

Fig. 9 shows release film attaching bubbles.

Fig. 10 shows the protective film and the release film attached with edge folding wrinkles.

Fig. 11 shows the protective film and the release film attached with edge folding wrinkles.

Fig. 12 shows the protective film and the release film attached with edge folding wrinkles.

FIG. 13 is a flow chart of a method for preparing a graphite bare die by calendering.

Detailed Description

The technical solution of the present invention is described in full and clearly below by way of example applications.