阅读说明：本技术 一种针刺碳碳埚托的生产工艺 (Production process of needled carbon crucible support ) 是由 刘雄 于 2020-12-20 设计创作，主要内容包括：本发明公开了一种针刺碳碳埚托的生产工艺,具体步骤如下：依据客户图纸,设计预制体加工尺寸,并下发至车间；车间依据预制体图纸设计相应的模具；采取直接刷胶的方式,在模具上粘合泡沫,再将粘贴好泡沫后的模具安装到针刺设备上,将斜丝杠升高至与台面成90度角,手动转动模具；使用七排小针板,隔行装四排针,通过模板将其垫高后装到预定针刺位置；在模具中进行碳布、网胎的循环铺层、针刺；通过天然气沉积、树脂浸渍、碳化、机加工、封孔,得到客户图纸尺寸要求的针刺碳碳埚托成品,本发明适用于针刺碳碳埚托的生产,本发明通过在埚托铺层时采用碳布、网胎循环结构,每层铺层完成均进行针刺,层间结合力大,不易分层、起皮。(The invention discloses a production process of a needled carbon crucible support, which comprises the following specific steps: designing the machining size of the prefabricated part according to a customer drawing, and sending the prefabricated part to a workshop; designing a corresponding mold by a workshop according to a drawing of the prefabricated part; adhering foam on a mould by adopting a direct glue brushing mode, installing the mould with the adhered foam on needling equipment, lifting an inclined lead screw to form an angle of 90 degrees with a table top, and manually rotating the mould; seven rows of small needle plates are used, four rows of needles are installed in an interlaced mode, and the needles are heightened through a template and then are installed at a preset needling position; carrying out cyclic layering and needling of carbon cloth and net tire in a mold; the finished product of the needled carbon crucible support required by the drawing size of a customer is obtained through natural gas deposition, resin impregnation, carbonization, machining and hole sealing.)

1. A production process of a needled carbon crucible support is characterized by comprising the following steps: the method comprises the following specific steps:

(S1), designing the machining size of the prefabricated part according to the drawing of a customer, and sending the prefabricated part to a workshop;

(S2) designing a corresponding mold by a workshop according to the drawing of the preform, and then sending the mold to a machining workshop for size processing and surface polishing;

(S3) adopting a direct glue brushing mode, adhering foam on the mould, and then installing the mould adhered with the foam on needling equipment;

(S4) sleeving the mold with the flange on the needling equipment shaft, lifting the inclined lead screw to form an angle of 90 degrees with the table top, manually rotating the mold, and locking jackscrews on two sides of the flange after confirming that the port of the needling equipment shaft is completely contacted with the bottom of the mold;

(S5) using seven rows of small needle plates, arranging four rows of needles in an interlaced mode, heightening the needles through a template, then arranging the needles at the preset needling position, and fixing the needles through a G-shaped clamp;

(S6), layering and needling: carrying out cyclic layering and needling of carbon cloth and net tire in a mould, and then demoulding and baking;

(S7) obtaining a finished needle-punched carbon crucible support product required by the drawing size of a customer through natural gas deposition, resin impregnation, carbonization, machining and hole sealing.

2. The production process of the needled carbon crucible support of claim 1, wherein: the foam pasted in the step (S3) is divided into two parts, namely an arc section and a flat section, wherein the arc section is divided into four equal parts, the pasting is preferentially carried out, and then the flat section pasting is carried out.

3. The production process of the needled carbon crucible support of claim 2, wherein: the bonding gap between each part of the foam is less than 3 mm.

4. The production process of the needled carbon crucible support of claim 1, wherein: the length of the needle in the step (S5) is 20 cm.

5. The production process of the needled carbon crucible support of claim 2, wherein: in the step (S6), when the carbon cloth and the mesh are layered to form 1-10 layers, the needling depth of the needling equipment is 12-13 mm; when the layering of the carbon cloth and the net tire is 10-20 layers, the needling depth of the needling equipment is 16-19 mm; and when the carbon cloth and the net tire are layered after 20 layers, the needling depth of the needling equipment is 16-19 mm.

6. The production process of the needled carbon crucible support of claim 5, wherein: in the step (S6), the frequency conversion of the acupuncture is 0.68 +/-0.02, and the acupuncture frequency is 38-50.

7. The production process of the needled carbon crucible support of claim 6, wherein: in the step (S6), when the carbon cloth and the mesh tire are layered in 1-10 layers, the puncture frequency of the arc segment is 38, 42, 46, and the puncture frequency of the flat segment is 50, and when the carbon cloth and the mesh tire are layered in the last layer, the puncture frequency of the arc segment is 38, 44, and the puncture frequency of the flat segment is 50.

Technical Field

The invention belongs to the technical field of carbon crucible supports, and particularly relates to a production process of a needled carbon crucible support.

Background

In recent two years, along with the continuous increase of the thermal field size of the single crystal furnace, the initial charging amount is increased, so that new requirements on materials for bearing the crucible are met, the bearing strength of the graphite crucible support is insufficient, the weight of the crucible loaded with 32 inches cannot be borne, and moreover, the cost of the graphite crucible support is higher than that of a carbon crucible, so that the graphite crucible support cannot conform to the current large trend of cost reduction and efficiency improvement in the single crystal industry.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a production process of a needled carbon crucible support.

In order to achieve the purpose, the invention adopts the following technical scheme:

a production process of a needled carbon crucible support comprises the following specific steps:

(S1), designing the machining size of the prefabricated part according to the drawing of a customer, and sending the prefabricated part to a workshop;

(S2) designing a corresponding mold by a workshop according to the drawing of the preform, and then sending the mold to a machining workshop for size processing and surface polishing;

(S3) adopting a direct glue brushing mode, adhering foam on the mould, and then installing the mould adhered with the foam on needling equipment;

(S4) sleeving the mold with the flange on the needling equipment shaft, lifting the inclined lead screw to form an angle of 90 degrees with the table top, manually rotating the mold, and locking jackscrews on two sides of the flange after confirming that the port of the needling equipment shaft is completely contacted with the bottom of the mold;

(S5) using seven rows of small needle plates, arranging four rows of needles in an interlaced mode, heightening the needles through a template, then arranging the needles at the preset needling position, and fixing the needles through a G-shaped clamp;

(S6), layering and needling: carrying out cyclic layering and needling of carbon cloth and net tire in a mould, and then demoulding and baking;

(S7) obtaining a finished needle-punched carbon crucible support product required by the drawing size of a customer through natural gas deposition, resin impregnation, carbonization, machining and hole sealing.

Preferably, the foam pasted in the step (S3) is divided into two parts, namely, a circular arc section and a flat section, wherein the circular arc section is divided into four equal parts, the pasting is preferentially carried out, and then the flat section pasting is carried out.

Preferably, the bonding gaps between the foam parts are less than 3 mm.

Preferably, the length of the needle in the step (S5) is 20 cm.

Preferably, in the step (S6), when the carbon cloth and the mesh tire are layered to form 1-10 layers, the needling depth of the needling equipment is 12-13 mm; when the layering of the carbon cloth and the net tire is 10-20 layers, the needling depth of the needling equipment is 16-19 mm; and when the carbon cloth and the net tire are layered after 20 layers, the needling depth of the needling equipment is 16-19 mm.

Preferably, the frequency of the acupuncture in the step (S6) is 0.68 + -0.02, and the frequency of the acupuncture is 38-50.

Preferably, in the step (S6), the needling frequency in the circular arc segment is 38, 42, 46, and the needling frequency in the flat segment is 50 when the carbon cloth and the mesh tire are layered in 1-10 layers, and the needling frequency in the circular arc segment is 38, 44, and the needling frequency in the flat segment is 50 when the carbon cloth and the mesh tire are layered in the last layer.

According to the invention, a carbon cloth and net tire circulating structure is adopted when the crucible support is layered, each layered layer is needled, the interlayer binding force is large, delamination and peeling are not easy to occur, the integrity of plain cloth carbon fiber is ensured, the stress uniformity in each direction is good, and the crucible support is more durable than a graphite crucible support;

the resistivity of the carbon crucible support prepared by the process is not influenced by repeated heating, the resistivity of the material is reduced along with the increase of the graphitization degree, and the carbon-carbon composite material has better temperature fluctuation resistance than a graphite material and has good dynamic strength when working in a high-temperature environment.

Detailed Description

The following further describes a specific implementation mode of the production process of the needled carbon crucible support. The production process of the needled carbon pot support is not limited to the description of the following examples.

Example 1:

the embodiment provides a production process of a needled carbon crucible support, which comprises the following specific steps:

(S1), designing the machining size of the prefabricated part according to the drawing of a customer, and sending the prefabricated part to a workshop;

(S2) designing a corresponding mold by a workshop according to the drawing of the preform, and then sending the mold to a machining workshop for size processing and surface polishing;

(S3) adopting a direct glue brushing mode, adhering foam on the mould, and then installing the mould adhered with the foam on needling equipment;

(S4) sleeving the mold with the flange on the needling equipment shaft, lifting the inclined lead screw to form an angle of 90 degrees with the table top, manually rotating the mold, and locking jackscrews on two sides of the flange after confirming that the port of the needling equipment shaft is completely contacted with the bottom of the mold;

(S5) using seven rows of small needle plates, arranging four rows of needles in an interlaced mode, heightening the needles through a template, then arranging the needles at the preset needling position, and fixing the needles through a G-shaped clamp;

(S6), layering and needling: carrying out cyclic layering and needling of carbon cloth and net tire in a mould, and then demoulding and baking;

(S7) obtaining a finished needle-punched carbon crucible support product required by the drawing size of a customer through natural gas deposition, resin impregnation, carbonization, machining and hole sealing.

The foam pasted in the step (S3) is divided into two parts, namely, an arc section and a flat section, wherein the arc section is divided into four equal parts, the pasting is preferentially carried out, and then the flat section pasting is carried out.

The bonding gap between each part of the foam is less than 3 mm.

The length of the needle in the step (S5) was 20 cm.

In the step (S6), when the layering of the carbon cloth and the net tire is 1-10 layers, the needling depth of the needling equipment is 12-13 mm; when the layering of the carbon cloth and the net tire is 10-20 layers, the needling depth of the needling equipment is 16-19 mm; and when the carbon cloth and the net tire are layered after 20 layers, the needling depth of the needling equipment is 16-19 mm.

In the step (S6), the frequency conversion of acupuncture is 0.68 +/-0.02, and the acupuncture frequency is 38-50.

And (S6) needling, wherein when the carbon cloth and the net tire are layered to be 1-10 layers, the needling frequency of the arc section is 38, 42 and 46, and the needling frequency of the flat section is 50, and when the carbon cloth and the net tire are layered to be the last layer, the needling frequency of the arc section is 38 and 44, and the needling frequency of the flat section is 50.

By adopting the technical scheme:

in the process, the crucible support laying layers adopt a carbon cloth and net tire circulating structure, each layer is needled, the interlayer bonding force is large, the layering and peeling are not easy to occur, the integrity of plain cloth carbon fibers is ensured, the stress uniformity in each direction is good, and the crucible support is more durable than a graphite crucible support;

the resistivity of the carbon crucible support prepared by the process is not influenced by repeated heating, the resistivity of the material is reduced along with the increase of the graphitization degree, and the carbon-carbon composite material has better temperature fluctuation resistance than a graphite material and has good dynamic strength when working in a high-temperature environment.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.