Special-shaped pipe fitting forming method used in communication field

文档序号：793763 发布日期：2021-04-13 浏览：29次中文

阅读说明：本技术 一种用于通信领域的异形管件成型方法 (Special-shaped pipe fitting forming method used in communication field ) 是由杨文光孙克原夏炎王孝刚徐辉刘向阳汪海飞陈路路陈中顺于 2020-12-29 设计创作，主要内容包括：本发明公开了一种用于通信领域的异形管件成型方法,包括以下步骤：(1)将PTFE分散树脂放入振动筛上,将大的杂质及结团分离掉；(2)将PTFE分散树脂和助挤剂混合,得到混合料；(3)对混合料加热放置使之熟化；(4)将熟化后的混合料使用振动筛进行过筛,对过筛的混合料进行初步压缩,得到预压坯；(5)利用PTFE分散挤出设备将预压坯从口模中压缩后挤出,得到异形产品；(6)对挤出的异形产品进行烧结。本方法用于通信领域的异形管件成型制备出的异形管件的管壁不易变形,不存在气孔、开裂等缺陷。(The invention discloses a special-shaped pipe fitting forming method used in the field of communication, which comprises the following steps: (1) putting PTFE dispersion resin on a vibrating screen, and separating large impurities and agglomerates; (2) mixing PTFE dispersion resin and an extrusion aid to obtain a mixture; (3) heating and placing the mixture for curing; (4) sieving the cured mixture by using a vibrating screen, and primarily compressing the sieved mixture to obtain a pre-pressed blank; (5) compressing the pre-pressed blank from a neck mold by using PTFE dispersion extrusion equipment and then extruding to obtain a special-shaped product; (6) and sintering the extruded special-shaped product. The method is used for forming the special-shaped pipe fitting in the communication field, and the pipe wall of the special-shaped pipe fitting is not easy to deform and does not have the defects of air holes, cracking and the like.)

1. A method for forming a special-shaped pipe fitting used in the communication field is characterized in that: the method comprises the following steps:

(1) putting PTFE dispersion resin on a vibrating screen, and separating large impurities and agglomerates;

(2) mixing PTFE dispersion resin and an extrusion aid to obtain a mixture;

(3) heating and placing the mixture for curing;

(4) sieving the cured mixture by using a vibrating screen, and primarily compressing the sieved mixture to obtain a pre-pressed blank;

(5) compressing the pre-pressed blank from a neck mold by using PTFE dispersion extrusion equipment and then extruding to obtain a special-shaped product;

(6) and removing the extrusion aid from the extruded special-shaped product and sintering.

2. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: the step (2) is specifically as follows:

and mixing the PTFE dispersion resin, the extrusion aid and the anti-extrusion deformation powder by a mixer to obtain a mixture.

3. Method for forming a shaped pipe element for the field of telecommunications according to claim 2, characterized in that: wherein the extrusion aid comprises petroleum ether, aviation kerosene or isoparaffin.

4. A shaped pipe fitting forming method for the field of telecommunications as claimed in claim 3, characterized in that: the anti-extrusion deformation powder comprises ceramic powder and light calcium carbonate, wherein the ceramic powder is titanic acid ceramic powder or silicon dioxide ceramic powder.

5. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: the step (3) is specifically as follows:

and sealing the mixture in a barrel, placing the barrel in an oven, and heating at constant temperature of 30-80 ℃ to cure the mixture for 20-60 hours.

6. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: the step (4) is specifically as follows:

and sieving the cured mixture by using a vibrating screen, adding the mixture into the cavity, and driving a pressing block to move upwards by using hydraulic equipment to preliminarily compress the mixture in the cavity, wherein the pressure is 2-8 MPa, and the pressure maintaining time is 1-10 min.

7. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: the step (5) is specifically as follows:

compressing the pre-pressed blank from a neck mold by using PTFE dispersion extrusion equipment and then extruding to obtain a special-shaped product, and meanwhile, drawing the special-shaped product by using a drawing device at a drawing speed of 0.5-3.05 m/min; if the special-shaped product is in a symmetrical style, when the special-shaped product is directionally pulled, the pulling guide of the pulling device needs to be over against the symmetrical axis of the product; wherein the extrusion pressure of the PTFE dispersion extrusion equipment is 30-70 MPa, the extrusion speed is 0.45-3 m/min, the temperature of a material cavity is 40-80 ℃, and the temperature of a neck mold is 40-80 ℃.

8. Shaped pipe fitting forming method for the field of telecommunications, according to claim 7, characterized in that: the cone angle range of the mouth mold and the core mold on the PTFE dispersion extrusion equipment is 20-40 degrees, the matching length of the flat and straight sections of the mouth mold and the core mold is not less than 10mm, the length of the core mold protruding out of the mouth mold is not more than 5cm, and the distance between the traction device and the mouth mold is not less than 10 cm.

9. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: the step (6) is specifically as follows:

the traction device drives the special-shaped product to vertically enter a sintering section, the extrusion aid is removed at a high temperature and the special-shaped product is sintered, the sintering section comprises three sections of temperatures, and the temperatures are respectively from top to bottom: 300 +/-10 ℃, 400 +/-10 ℃ and 400 +/-10 ℃; the sintering section adopts a vertical furnace or a tunnel furnace.

10. Shaped pipe fitting forming method for the field of telecommunications, according to claim 1, characterized in that: and a static removing device is also arranged between the PTFE dispersion extrusion equipment and the sintering section and is used for removing static on the special-shaped product.

Technical Field

The invention relates to the technical field of communication, in particular to a special-shaped pipe fitting forming method used in the field of communication and used for transmitting electronic signals and high-frequency mechanical waves.

Background

The conventional signal wire harness is usually prepared from materials such as PVC, PE, PP and the like, but the materials have poor temperature resistance and corrosion resistance, and large loss also exists in transmission loss of some high-frequency signals.

The PTFE material has excellent high temperature resistance and corrosion resistance, and the loss of high-frequency signal transmission is extremely low (10 GHz, dielectric loss is 0.0002); however, the PTFE molding process has the defects of large size change and uneven molding pressure, which leads to serious product deformation, and meanwhile, the prepared special pipe fitting has the defects of air holes, cracking and the like in the pipe wall, which is not beneficial to signal transmission.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a special-shaped pipe fitting forming method for the communication field aiming at the defects of the prior art, and the special-shaped pipe fitting prepared by the special-shaped pipe fitting forming method for the communication field has the advantages of good dimensional stability, difficult deformation of a pipe wall, no defects of air holes, cracking and the like.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a method for forming a special-shaped pipe fitting in the field of communication comprises the following steps:

(1) putting PTFE dispersion resin on a vibrating screen, and separating large impurities and agglomerates;

(2) mixing PTFE dispersion resin and an extrusion aid to obtain a mixture;

(3) heating and placing the mixture for curing;

(4) sieving the cured mixture by using a vibrating screen, and primarily compressing the sieved mixture to obtain a pre-pressed blank;

(5) compressing the pre-pressed blank from a neck mold by using PTFE dispersion extrusion equipment and then extruding to obtain a special-shaped product;

(6) and removing the extrusion aid from the extruded special-shaped product and sintering.

As a further improved technical scheme of the invention, the step (2) is specifically as follows:

and mixing the PTFE dispersion resin, the extrusion aid and the anti-extrusion deformation powder by a mixer to obtain a mixture.

As a further improvement of the technical scheme, the extrusion aid comprises petroleum ether, aviation kerosene or isoparaffin.

As a further improved technical scheme of the invention, the anti-extrusion deformation powder comprises ceramic powder and light calcium carbonate, and the ceramic powder is titanic acid ceramic powder or silicon dioxide ceramic powder.

As a further improved technical scheme of the invention, the step (3) is specifically as follows:

and sealing the mixture in a barrel, placing the barrel in an oven, and heating at constant temperature of 30-80 ℃ to cure the mixture for 20-60 hours.

As a further improved technical scheme of the invention, the step (4) is specifically as follows:

As a further improved technical scheme of the invention, the step (5) is specifically as follows:

As a further improved technical scheme of the invention, the cone angle ranges of the mouth mold and the core mold on the PTFE dispersion extrusion equipment are both 20-40 degrees, the matching length of the flat straight section of the mouth mold and the flat straight section of the core mold is not less than 10mm, the length of the core mold protruding out of the mouth mold is not more than 5cm, and the distance between the traction device and the mouth mold is not less than 10 cm.

As a further improved technical scheme of the invention, the step (6) is specifically as follows:

As a further improved technical scheme of the invention, a static removing device is also arranged between the PTFE dispersion extrusion equipment and the sintering section and is used for removing static on the special-shaped product.

The invention has the beneficial effects that:

the special-shaped pipe fitting is produced by utilizing the characteristics of PTFE and adopting dispersive extrusion as a signal transmission wire harness.

The defects that products made of PTFE in the prior art are large in size change and easy to deform are overcome by dispersing and extruding PTFE dispersion resin which can be fiberized, adding extrusion deformation prevention powder into the PTFE dispersion resin and guiding and drawing. Through sieving PTFE dispersion resin and sieving the cured mixture, large-particle materials are removed: preliminarily compressing the cured mixture by using hydraulic equipment, and extruding the mixture by using PTFE dispersion extrusion equipment, wherein the molding pressure is uniform; the defects of pores, cracking and the like in the later-period product are avoided. The special-shaped pipe fitting prepared by the invention has good dimensional stability, the pipe wall is not easy to deform, and the defects of air holes, cracking and the like do not exist.

Drawings

Fig. 1 is a diagram of the forming process of the tube profile of the embodiment.

Fig. 2 is a partially enlarged view of a in fig. 1.

Detailed Description

The following embodiments of the invention are further illustrated:

example 1:

a method for forming a special-shaped pipe fitting in the field of communication comprises the following steps:

(1) cleaning the screen, placing the empty special barrel in a discharge port of the vibrating screen, opening the vibrating screen, pouring PTFE dispersion resin, and separating large impurities and agglomerates.

(2) Weighing an empty special barrel by an electronic scale, peeling, pouring 50% of PTFE dispersion resin into the barrel, taking out an extrusion aid and extrusion deformation prevention powder with specified weight by a measuring cup, wherein the weight proportion of the extrusion aid is 40%, the weight proportion of the extrusion deformation prevention powder is 10%, pouring into the barrel added with the main resin, screwing a barrel cover, fixing the barrel after mixing on a mixer, and opening the mixer for mixing to obtain a mixture. Wherein the extrusion aid comprises petroleum ether, aviation kerosene or isoparaffin, preferably isoparaffin. Wherein the anti-extrusion deformation powder comprises ceramic powder and light calcium carbonate, and the ceramic powder is titanic acid ceramic powder and/or silicon dioxide ceramic powder. The addition of the ceramic powder of titanium acids and silicon dioxide can also improve and adjust the dielectric constant, ensure the stability of dielectric property and can be applied to the transmission of 5G signals.

(3) And sealing the mixture in a barrel by using a packaging film, placing the barrel in an oven, and heating at constant temperature of 30 ℃ to cure the mixture for 20 hours.

(4) And (3) sieving the cured mixture by using a vibrating screen, adding the mixture into the cavity, and driving a pressing block to move upwards by using hydraulic equipment to preliminarily compress the mixture in the cavity, wherein the pressure is 2MPa, and the pressure maintaining time is 1 min.

(5) As shown in fig. 1 and fig. 2, a PTFE dispersion extrusion device 1 (or a plunger extrusion device) is used for compressing and extruding the pre-pressed blank from a die a1 to obtain a special-shaped product 3, and the special-shaped product 3 is pulled by a pulling device 2 at a pulling speed of 0.5 m/min; if the special-shaped product 3 is in a symmetrical style, when the special-shaped product 3 is directionally pulled, the pulling guide of the pulling device 2 needs to be over against the symmetrical axis of the product; wherein the extrusion pressure of the PTFE dispersion extrusion equipment 1 is 30MPa, the extrusion speed is 0.45m/min, the temperature of a material cavity is 40 ℃, and the temperature of a neck ring die A1 is 40 ℃.

(6) As shown in fig. 1, the traction device 2 drives the special-shaped product 3 to vertically enter the sintering section 5, the extrusion aid is removed at a high temperature and the special-shaped product is sintered, the sintering section 5 comprises three sections of temperatures, and the temperatures are respectively as follows from top to bottom: 290 ℃, 390 ℃ and 490 ℃; the sintering section 5 adopts a vertical furnace or a tunnel furnace.

As shown in fig. 2, in which the taper angles of the die a1 and the mandrel a2 on the PTFE dispersion extrusion apparatus 1 both ranged from 20 °, the material compression force was increased to make the extrusion denser, the mating length of the straight section of the die a1 and the straight section of the mandrel a2 was 10mm, the mandrel a2 was flush with the die a1, and the distance between the pulling device 2 and the die a1 was 10 cm. The distance between the mouth die A1 and the core die A2 of the PTFE dispersion extrusion equipment 1 can be adjusted, the distance between the mouth die A1 and the core die A2 can be adjusted through the adjusting bolt A3, so that the extrusion distortion can be eliminated, and the uniform wall thickness of a product is ensured.

A static removing device 4 is further arranged between the PTFE dispersion extrusion device 1 and the sintering section 5, and the static removing device 4 is used for removing static on the special-shaped product 3, so that static electricity is prevented from making the special-shaped product adhere to the wall of the sintering section 5.

Example 2:

a method for forming a special-shaped pipe fitting in the field of communication comprises the following steps:

(2) Weighing an empty special barrel by an electronic scale, peeling, pouring 40% of PTFE dispersion resin into the barrel, taking out an extrusion aid and extrusion deformation prevention powder with specified weight by a measuring cup, wherein the weight ratio of the extrusion aid is 20% and the weight ratio of the extrusion deformation prevention powder is 40%, pouring into the barrel added with the main resin, screwing a barrel cover, fixing the barrel after mixing on a mixer, and opening the mixer for mixing to obtain a mixture. Wherein the extrusion aid comprises petroleum ether, aviation kerosene or isoparaffin. Wherein the anti-extrusion deformation powder comprises ceramic powder and light calcium carbonate, and the ceramic powder is titanic acid ceramic powder and/or silicon dioxide ceramic powder. The addition of the ceramic powder of titanium acids and silicon dioxide can also improve and adjust the dielectric constant, ensure the stability of dielectric property and can be applied to the transmission of 5G signals.

(3) And sealing the mixture in a barrel by using a packaging film, placing the barrel in an oven, and heating at the constant temperature of 55 ℃ to cure the mixture for 40 h.

(5) As shown in fig. 1 and fig. 2, a PTFE dispersion extrusion device 1 (or a plunger extrusion device) is used for compressing and extruding the pre-pressed blank from a die a1 to obtain a special-shaped product 3, and the special-shaped product 3 is pulled by a pulling device 2 at a pulling speed of 1.775 m/min; if the special-shaped product 3 is in a symmetrical style, when the special-shaped product 3 is directionally pulled, the pulling guide of the pulling device 2 needs to be over against the symmetrical axis of the product; wherein the extrusion pressure of the PTFE dispersion extrusion equipment 1 is 50MPa, the extrusion speed is 1.725m/min, the temperature of a material cavity is 60 ℃, and the temperature of a neck mold A1 is 60 ℃.

(6) As shown in fig. 1, the traction device 2 drives the special-shaped product 3 to vertically enter the sintering section 5, the extrusion aid is removed at a high temperature and the special-shaped product is sintered, the sintering section 5 comprises three sections of temperatures, and the temperatures are respectively as follows from top to bottom: 300 ℃, 400 ℃ and 400 ℃; the sintering section 5 adopts a vertical furnace or a tunnel furnace.

As shown in fig. 2, in which the taper angles of the die a1 and the mandrel a2 of the PTFE dispersion extrusion apparatus 1 both ranged from 30 °, the material compression force was increased to make the extrusion denser, the combined length of the straight section of the die a1 and the straight section of the mandrel a2 was 12mm, the length of the protrusion of the mandrel a2 from the die a1 was 2cm, and the distance between the pulling device 2 and the die a1 was 12 cm. The distance between the mouth die A1 and the core die A2 of the PTFE dispersion extrusion equipment 1 can be adjusted, the distance between the mouth die A1 and the core die A2 can be adjusted through the adjusting bolt A3, so that the extrusion distortion can be eliminated, and the uniform wall thickness of a product is ensured.

Example 3:

a method for forming a special-shaped pipe fitting in the field of communication comprises the following steps:

(2) Weighing an empty special barrel by an electronic scale, peeling, pouring 50% of PTFE dispersion resin into the barrel, taking out an extrusion aid and extrusion deformation prevention powder with specified weight by a measuring cup, wherein the weight proportion of the extrusion aid is 30% and the weight proportion of the extrusion deformation prevention powder is 20%, pouring into the barrel added with the main resin, screwing a barrel cover, fixing the barrel after mixing on a mixer, and opening the mixer for mixing to obtain a mixture. Wherein the extrusion aid comprises petroleum ether, aviation kerosene or isoparaffin. Wherein the anti-extrusion deformation powder comprises ceramic powder and light calcium carbonate, and the ceramic powder is titanic acid ceramic powder and/or silicon dioxide ceramic powder. The addition of the ceramic powder of titanium acids and silicon dioxide can also improve and adjust the dielectric constant, ensure the stability of dielectric property and can be applied to the transmission of 5G signals.

(3) And sealing the mixture in a barrel by using a packaging film, placing the barrel in an oven, and heating at a constant temperature of 80 ℃ to cure the mixture for 60 hours.

(5) As shown in fig. 1 and fig. 2, a PTFE dispersion extrusion device 1 (or a plunger extrusion device) is used for compressing and extruding the pre-pressed blank from a die a1 to obtain a special-shaped product 3, and the special-shaped product 3 is pulled by a pulling device 2 at a pulling speed of 3.05 m/min; if the special-shaped product 3 is in a symmetrical style, when the special-shaped product 3 is directionally pulled, the pulling guide of the pulling device 2 needs to be over against the symmetrical axis of the product; wherein the extrusion pressure of the PTFE dispersion extrusion equipment 1 is 70MPa, the extrusion speed is 3m/min, the temperature of a material cavity is 80 ℃, and the temperature of a neck ring mold A1 is 80 ℃.

(6) As shown in fig. 1, the traction device 2 drives the special-shaped product 3 to vertically enter the sintering section 5, the extrusion aid is removed at a high temperature and the special-shaped product is sintered, the sintering section 5 comprises three sections of temperatures, and the temperatures are respectively as follows from top to bottom: 310 ℃, 410 ℃ and 410 ℃; the sintering section 5 adopts a vertical furnace or a tunnel furnace.

As shown in fig. 2, in which the taper angles of the die a1 and the mandrel a2 of the PTFE dispersion extrusion apparatus 1 both ranged from 40 °, the material compression force was increased to make the extrusion denser, the combined length of the straight section of the die a1 and the straight section of the mandrel a2 was 12cm, the length of the protrusion of the mandrel a2 from the die a1 was 5cm, and the distance between the pulling device 2 and the die a1 was 12 cm. The distance between the mouth die A1 and the core die A2 of the PTFE dispersion extrusion equipment 1 can be adjusted, the distance between the mouth die A1 and the core die A2 can be adjusted through the adjusting bolt A3, so that the extrusion distortion can be eliminated, and the uniform wall thickness of a product is ensured.

The products prepared in the above examples were tested to obtain the following data:

in summary, the defects of large size change and easy deformation of products made of PTFE in the prior art are overcome by performing dispersion extrusion by using a PTFE dispersion resin which can be fiberized, adding extrusion deformation prevention powder into the PTFE dispersion resin and guiding traction. Through sieving PTFE dispersion resin and sieving the cured mixture, large-particle materials are removed: preliminarily compressing the cured mixture by using hydraulic equipment, and extruding the mixture by using PTFE dispersion extrusion equipment 1; the defects of pores, cracking and the like in the later-period product are avoided.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

10页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：一种线缆挤出装置

Special-shaped pipe fitting forming method used in communication field

相关技术

网友询问留言