WO2022144036A1 - 一种用于通信领域的异形管件成型方法 - Google Patents

一种用于通信领域的异形管件成型方法 Download PDF

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WO2022144036A1
WO2022144036A1 PCT/CN2022/076371 CN2022076371W WO2022144036A1 WO 2022144036 A1 WO2022144036 A1 WO 2022144036A1 CN 2022076371 W CN2022076371 W CN 2022076371W WO 2022144036 A1 WO2022144036 A1 WO 2022144036A1
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Prior art keywords
special
mixture
extrusion
die
shaped pipe
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PCT/CN2022/076371
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English (en)
French (fr)
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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
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南京肯特复合材料股份有限公司
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Publication of WO2022144036A1 publication Critical patent/WO2022144036A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes

Definitions

  • the invention relates to the technical field of communications, in particular to a method for forming a special-shaped pipe fitting in the field of communications, which is used for the transmission of electronic signals and high-frequency mechanical waves.
  • Conventional signal wiring harnesses are usually made of PVC, PE, PP and other materials, but the material has poor temperature resistance and corrosion resistance, and there is also a large loss in the transmission loss of some high-frequency signals.
  • PTFE material has excellent high temperature resistance and corrosion resistance, and the loss of high-frequency signal transmission is extremely low (10GHz, dielectric loss 0.0002); however, during the PTFE molding process, there are large dimensional changes and uneven molding pressure, which leads to serious product deformation. At the same time, there are defects such as pores and cracks in the pipe wall of the prepared special-shaped pipe fittings, which is not conducive to the transmission of signals.
  • the technical problem to be solved by the present invention is to provide a special-shaped pipe fitting forming method for the communication field, aiming at the shortcomings of the prior art.
  • the special-shaped pipe fitting prepared by the special-shaped pipe fitting forming method for the communication field has good dimensional stability, The wall is not easily deformed, and there are no defects such as pores and cracks.
  • a special-shaped pipe fitting forming method used in the communication field comprising the following steps:
  • step (2) is specifically:
  • the extrusion aid includes petroleum ether, aviation kerosene or isoparaffin.
  • the anti-extrusion deformation powder includes ceramic powder and light calcium carbonate, and the ceramic powder is titanic acid-based ceramic powder or silica-based ceramic powder.
  • step (3) is specifically:
  • the mixture in a bucket, place the bucket in an oven, and heat the mixture at a constant temperature of 30°C to 80°C to mature the mixture.
  • the aging time is 20h to 60h.
  • the step (4) is specifically:
  • the aged mixture is sieved with a vibrating screen. After the mixture is added to the cavity, the mixture in the cavity is preliminarily compressed by hydraulic equipment.
  • the pressure is 2MPa to 8MPa, and the pressure holding time is 1min to 10min.
  • the step (5) is specifically:
  • PTFE dispersion extrusion equipment to compress the preform from the die and extrude it to obtain a special-shaped product.
  • the special-shaped product is pulled by a traction device, and the pulling speed is 0.5m/min ⁇ 3.05m/min; if the special-shaped product is Symmetrical style, when directional traction is performed on special-shaped products, the traction guide of the traction device needs to be facing the symmetry axis of the product;
  • the extrusion pressure of the PTFE dispersion extrusion equipment is 30MPa ⁇ 70MPa, and the extrusion speed is 0.45m/min ⁇ 3m/min , the material cavity temperature is 40°C ⁇ 80°C, and the die temperature is 40°C ⁇ 80°C.
  • the taper angles of the die and the core die on the PTFE dispersion extrusion equipment are both 20° to 40°, and the mating lengths of the straight section of the die and the straight section of the core die are different. less than 10mm, the length of the convex die of the core die is not more than 5cm, and the distance between the traction device and the die is not less than 10cm.
  • step (6) is specifically:
  • the traction device drives the special-shaped product vertically into the sintering section, removes the extrusion aid and sinters at high temperature.
  • the sintering section includes three temperature sections, the temperatures from top to bottom are: 300 ⁇ 10°C, 400 ⁇ 10°C and 400 ⁇ 10°C;
  • the sintering section adopts a vertical furnace or a tunnel furnace.
  • a static elimination device is further arranged between the PTFE dispersion extrusion equipment and the sintering section, and the static elimination device is used to remove static electricity on the special-shaped product.
  • the invention utilizes the characteristics of PTFE and adopts dispersed extrusion to produce special-shaped pipe fittings as signal transmission wire bundles.
  • the fibrillable PTFE dispersion resin for dispersion extrusion, adding anti-extrusion deformation powder to the PTFE dispersion resin, and guiding and pulling, the defects of the prior art products made of PTFE with large dimensional changes and easy deformation are solved.
  • the materials with large particles are removed by sieving the PTFE dispersion resin and the aged mixture: the aged mixture is preliminarily compressed by hydraulic equipment, and then extruded through PTFE dispersion extrusion equipment, and the molding pressure is uniform; Defects such as pores and cracks in later products are avoided.
  • the special-shaped pipe fitting prepared by the invention has good dimensional stability, the pipe wall is not easily deformed, and there are no defects such as pores and cracks.
  • FIG. 1 is a diagram of the forming process of the special-shaped pipe fitting according to the present embodiment.
  • FIG. 2 is a partial enlarged view of A in FIG. 1 .
  • a special-shaped pipe fitting forming method used in the communication field comprising the following steps:
  • the electronic scale weighs the empty special bucket, peels it, pours 50% PTFE dispersion resin into the bucket, and takes out the specified weight of extrusion aid and anti-extrusion deformation powder from the measuring cup.
  • the weight ratio of the extrusion aid is 40%
  • the weight ratio of the anti-extrusion deformation powder is 10%
  • pour it into the barrel that has added the main resin tighten the barrel cover, fix the barrel after mixing on the mixer, turn on the mixer to mix, and get the mixture material.
  • the extrusion aid includes petroleum ether, aviation kerosene or isoparaffin, preferably isoparaffin.
  • the anti-extrusion deformation powder includes ceramic powder and light calcium carbonate, and the ceramic powder is titanate ceramic powder and/or silica ceramic powder.
  • the addition of titanic acid and silica ceramic powders can also improve and adjust the dielectric constant, ensure the stability of the dielectric properties, and can be applied to the transmission of 5G signals.
  • the aged mixture is sieved with a vibrating screen, and after the mixture is added to the cavity, the hydraulic equipment is used to drive the briquette upward to initially compress the mixture in the cavity, the pressure is 2MPa, and the pressure holding time is 1min.
  • PTFE dispersion extrusion equipment 1 or plunger extrusion equipment
  • the traction device 2 is 0.5m/min; if the special-shaped product 3 is in a symmetrical pattern, when the special-shaped product 3 is oriented for traction, the traction guide of the traction device 2 needs to be facing the product symmetry axis; PTFE is dispersed and extruded.
  • the extrusion pressure of the equipment 1 was 30 MPa, the extrusion speed was 0.45 m/min, the temperature of the material cavity was 40 °C, and the temperature of the die A1 was 40 °C.
  • the traction device 2 drives the special-shaped product 3 to enter the sintering section 5 vertically, removes the extrusion aid and sinters at high temperature, and the sintering section 5 includes three temperatures, the temperatures from top to bottom are: 290 °C , 390°C and 400°C; the sintering section 5 adopts a vertical furnace or a tunnel furnace.
  • the cone angle range of the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 are both 20°, increasing the compression force of the material makes the extrusion more dense, the die A1 has a straight section and a core die A1.
  • the matching length of the straight section of the die A2 is 10 mm, the core die A2 is flush with the die A1, and the distance between the pulling device 2 and the die A1 is 10 cm.
  • the distance between the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 can be adjusted.
  • the distance between the die A1 and the core die A2 by adjusting the bolt A3 the extrusion distortion can be eliminated and the wall of the product can be guaranteed. Thick and even.
  • the PTFE dispersing extrusion equipment 1 and the sintering section 5 in this embodiment are also provided with an antistatic device 4, which is used to remove the static electricity on the special-shaped product 3, so as to avoid static electricity causing the special-shaped parts to be in the sintering section. 5 Adherent.
  • a special-shaped pipe fitting forming method used in the communication field comprising the following steps:
  • the extrusion aid includes petroleum ether, aviation kerosene or isoparaffin.
  • the anti-extrusion deformation powder includes ceramic powder and light calcium carbonate, and the ceramic powder is titanate ceramic powder and/or silica ceramic powder. The addition of titanic acid and silica ceramic powders can also improve and adjust the dielectric constant, ensure the stability of the dielectric properties, and can be applied to the transmission of 5G signals.
  • the aged mixture is sieved with a vibrating screen. After adding the mixture into the cavity, the hydraulic equipment is used to drive the briquette upward to initially compress the mixture in the cavity.
  • the pressure is 5MPa and the pressure holding time is 5.5min. .
  • PTFE dispersion extrusion equipment 1 or plunger extrusion equipment
  • the traction device 2 for traction, and the traction speed is 1.775m/min; if the special-shaped product 3 is in a symmetrical style, when the special-shaped product 3 is oriented for traction, the traction guide of the traction device 2 needs to be facing the product symmetry axis; where PTFE is dispersed and extruded.
  • the extrusion pressure of the equipment 1 was 50 MPa
  • the extrusion speed was 1.725 m/min
  • the temperature of the material cavity was 60 °C
  • the temperature of the die A1 was 60 °C.
  • the traction device 2 drives the special-shaped product 3 to enter the sintering section 5 vertically, removes the extrusion aid at high temperature and sinters, and the sintering section 5 includes three temperatures, the temperatures from top to bottom are: 300 °C , 400°C and 400°C; the sintering section 5 adopts a vertical furnace or a tunnel furnace.
  • the cone angle range of the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 are both 30°, increasing the material compression force makes the extrusion more dense, and the die A1 has a straight section and a core die A1.
  • the matching length of the straight section of the die A2 is 12 mm
  • the length of the core die A2 protruding from the die A1 is 2 cm
  • the distance between the pulling device 2 and the die A1 is 12 cm.
  • the distance between the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 can be adjusted.
  • the distance between the die A1 and the core die A2 by adjusting the bolt A3 the extrusion distortion can be eliminated and the wall of the product can be guaranteed. Thick and even.
  • the PTFE dispersing extrusion equipment 1 and the sintering section 5 in this embodiment are also provided with an antistatic device 4, which is used to remove the static electricity on the special-shaped product 3, so as to avoid static electricity causing the special-shaped parts to be in the sintering section. 5 Adherent.
  • a special-shaped pipe fitting forming method used in the communication field comprising the following steps:
  • the electronic scale weighs the empty special bucket, peels it, pours 50% PTFE dispersion resin into the bucket, and takes out the specified weight of extrusion aid and anti-extrusion deformation powder from the measuring cup.
  • the weight ratio of the extrusion aid is 30%
  • the weight ratio of the anti-extrusion deformation powder is 20%
  • pour it into the barrel that has added the main resin tighten the barrel cover, fix the barrel after mixing on the mixer, turn on the mixer to mix, and get the mixture material.
  • the extrusion aid includes petroleum ether, aviation kerosene or isoparaffin.
  • the anti-extrusion deformation powder includes ceramic powder and light calcium carbonate, and the ceramic powder is titanate ceramic powder and/or silica ceramic powder.
  • the addition of titanic acid and silica ceramic powders can also improve and adjust the dielectric constant, ensure the stability of the dielectric properties, and can be applied to the transmission of 5G signals.
  • the aged mixture is sieved with a vibrating screen. After adding the mixture into the cavity, the hydraulic equipment is used to drive the briquetting block upward to initially compress the mixture in the cavity.
  • the pressure is 8MPa and the pressure holding time is 10min.
  • PTFE dispersion extrusion equipment 1 or plunger extrusion equipment
  • the extrusion pressure of the equipment 1 was 70 MPa, the extrusion speed was 3 m/min, the temperature of the material cavity was 80 °C, and the temperature of the die A1 was 80 °C.
  • the traction device 2 drives the special-shaped product 3 into the sintering section 5 vertically, removes the extrusion aid at high temperature and sinters, and the sintering section 5 includes three temperatures, and the temperatures from top to bottom are: 310 ° C , 410°C and 410°C; the sintering section 5 adopts a vertical furnace or a tunnel furnace.
  • the cone angle range of the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 are both 40°, increasing the compression force of the material makes the extrusion more compact, the die A1 is straight and the core
  • the matching length of the straight section of the die A2 is 12 cm
  • the length of the core die A2 protruding from the die A1 is 5 cm
  • the distance between the pulling device 2 and the die A1 is 12 cm.
  • the distance between the die A1 and the core die A2 on the PTFE dispersion extrusion equipment 1 can be adjusted.
  • the distance between the die A1 and the core die A2 by adjusting the bolt A3 the extrusion distortion can be eliminated and the wall of the product can be guaranteed. Thick and even.
  • the PTFE dispersing extrusion equipment 1 and the sintering section 5 in this embodiment are also provided with an antistatic device 4, which is used to remove the static electricity on the special-shaped product 3, so as to avoid static electricity causing the special-shaped parts to be in the sintering section. 5 Adherent.
  • Example 1 Example 2
  • Example 3 Tensile Strength 25MPa 30MPa 35MPa Elongation at break 320% 300% 300% Is the solvent removed? Yes Yes Yes shape stable, not twisted stable, not twisted stable, not twisted
  • the protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that are easily thought of by those skilled in the art made by the present technology all fall within the scope of the present invention. protected range.

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  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

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。

Description

一种用于通信领域的异形管件成型方法 技术领域
本发明涉及通信技术领域，具体涉及一种用于通信领域的异形管件成型方法，用于电子信号及高频机械波的传递。
背景技术
常规的信号线束通常使用PVC、PE、PP等材料制备，但材料的耐温性，耐腐蚀性较差，在一些高频信号的传输损耗中也存在较大损耗。
PTFE材料具有优异的耐高温性、耐腐蚀性，而且高频信号传输的损耗极低(10GHz，介电损耗0.0002)；但PTFE成型过程中存在尺寸变化大，成型压力不均从而导致产品变形严重的缺陷，同时，制备出的异形管件的管壁中存在气孔、开裂等缺陷，不利于信号的传输。
发明内容
本发明所要解决的技术问题是针对上述现有技术的不足提供一种用于通信领域的异形管件成型方法，本用于通信领域的异形管件成型方法制备出的异形管件的尺寸稳定性好，管壁不易变形，不存在气孔、开裂等缺陷。
为实现上述技术目的，本发明采取的技术方案为：
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，将大的杂质和结团分离掉；
(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)对挤出的异形产品除助挤剂并进行烧结。
作为本发明进一步改进的技术方案，所述的步骤(2)具体为：
将PTFE分散树脂、助挤剂、防挤出变形粉末通过混料机混合，得到混合料。
作为本发明进一步改进的技术方案，其中助挤剂包括石油醚、航空煤油或异构烷烃。
作为本发明进一步改进的技术方案，其中防挤出变形粉末包括陶瓷粉和轻质碳酸钙，陶瓷粉为钛酸类陶瓷粉或二氧化硅类陶瓷粉。
作为本发明进一步改进的技术方案，所述的步骤(3)具体为：
将混合料密封置于桶内，将桶放置于烘箱中，在30℃～80℃条件下进行恒温加热使混合 料熟化，熟化时间为20h～60h。
作为本发明进一步改进的技术方案，所述的步骤(4)具体为：
将熟化后的混合料使用振动筛进行过筛，将混合料加入型腔后，利用液压设备初步压缩型腔内的混合料，压力为2MPa～8MPa，保压时间为1min～10min。
作为本发明进一步改进的技术方案，所述的步骤(5)具体为：
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，同时对异形产品使用牵引装置进行牵引，牵引速度为0.5m/min～3.05m/min；若异形产品为对称样式，对异形产品进行定向牵引时，牵引装置的牵引导向需要正对产品对称轴；其中PTFE分散挤出设备的挤出压力为30MPa～70MPa，挤出速度为0.45m/min～3m/min，料腔温度40℃～80℃，口模温度为40℃～80℃。
作为本发明进一步改进的技术方案，所述PTFE分散挤出设备上的口模和芯模的锥角范围均为20°～40°，口模平直段和芯模平直段的配合长度不小于10mm，芯模凸出口模的长度不大于5cm，所述牵引装置与口模的距离不小于10cm。
作为本发明进一步改进的技术方案，所述的步骤(6)具体为：
牵引装置带动异形产品垂直进入烧结段，在高温下除去助挤剂并烧结，烧结段包括三段温度，温度从上到下分别为：300±10℃、400±10℃和400±10℃；所述烧结段采用立式炉或者隧道炉。
作为本发明进一步改进的技术方案，所述PTFE分散挤出设备和烧结段之间还设有除静电装置，所述除静电装置用于除去异形产品上的静电。
本发明的有益效果为：
本发明利用PTFE的特性，采用分散挤出生产了异形管件作为信号传输线束。
通过利用可以纤维化的PTFE分散树脂进行分散挤出、在PTFE分散树脂中添加防挤出变形粉末、通过导向牵引解决了现有技术中PTFE制作的产品尺寸变化大，容易变形的缺陷。通过对PTFE分散树脂过筛、对熟化后的混合料过筛，去除了颗粒大的材料：利用液压设备对熟化后的混合料初步压缩，再通过PTFE分散挤出设备挤出，成型压力均匀；避免了后期产品中的孔隙、开裂等缺陷。本发明制备出的异形管件的尺寸稳定性好，管壁不易变形，不存在气孔、开裂等缺陷。
附图说明
图1为本实施例异形管件成型过程图。
图2为图1中A的局部放大图。
具体实施方式
下面本发明的具体实施方式作出进一步说明：
实施例1：
一种用于通信领域的异形管件成型方法，包括以下步骤：
(1)清理筛网，将空专用桶放于振动筛出料口，开启振动筛后，倒入PTFE分散树脂，将大的杂质和结团分离掉。
(2)电子秤称取空专用桶，去皮，在桶中倒入重量比例为50％的PTFE分散树脂，量杯取出指定重量的助挤剂和防挤出变形粉末，助挤剂重量比例为40％，防挤出变形粉末的重量比例为10％，倒入已加入主树脂的桶中，旋紧桶盖，将混料后的桶固定在混料机上，开启混料机混合，得到混合料。其中助挤剂包括石油醚、航空煤油或异构烷烃，优选异构烷烃。其中防挤出变形粉末包括陶瓷粉和轻质碳酸钙，陶瓷粉为钛酸类陶瓷粉和/或二氧化硅类陶瓷粉。钛酸类、二氧化硅类陶瓷粉的加入还可以提高和调整介电常数，保证介电性能的稳定性，可以应用于5G信号的传输方面。
(3)将混合料用包装膜密封置于桶内，将桶放置于烘箱中，在30℃条件下进行恒温加热使混合料熟化，熟化时间为20h。
(4)将熟化后的混合料使用振动筛进行过筛，将混合料加入型腔后，利用液压设备带动压块上行初步压缩型腔内的混合料，压力为2MPa，保压时间为1min。
(5)如图1和图2所示，利用PTFE分散挤出设备1(或者柱塞挤出设备)将预压坯从口模A1中压缩后挤出，得到异形产品3，同时对异形产品3使用牵引装置2进行牵引，牵引速度为0.5m/min；若异形产品3为对称样式，对异形产品3进行定向牵引时，牵引装置2的牵引导向需要正对产品对称轴；其中PTFE分散挤出设备1的挤出压力为30MPa，挤出速度为0.45m/min，料腔温度40℃，口模A1温度为40℃。
(6)如图1所示，牵引装置2带动异形产品3垂直进入烧结段5，在高温下除去助挤剂并烧结，烧结段5包括三段温度，温度从上到下分别为：290℃、390℃和400℃；所述烧结段5采用立式炉或者隧道炉。
如图2所示，其中PTFE分散挤出设备1上的口模A1和芯模A2的锥角范围均为20°，增加材料压缩力使得挤出的更密实，口模A1平直段和芯模A2平直段的配合长度为10mm，芯模A2与口模A1齐平，所述牵引装置2与口模A1的距离为10cm。本实施PTFE分散挤出设备1上的口模A1和芯模A2之间的间距可调节，通过调节螺栓A3对口模A1和芯模A2之间的间距进行调节可以消除挤出扭曲，保证产品壁厚均匀。
本实施例的所述PTFE分散挤出设备1和烧结段5之间还设有除静电装置4，所述除静电装置4用于除去异形产品3上的静电，避免静电使异形件在烧结段5贴壁。
实施例2：
一种用于通信领域的异形管件成型方法，包括以下步骤：
(1)清理筛网，将空专用桶放于振动筛出料口，开启振动筛后，倒入PTFE分散树脂，将大的杂质和结团分离掉。
(2)电子秤称取空专用桶，去皮，在桶中倒入重量比例为40％的PTFE分散树脂，量杯取出指定重量的助挤剂和防挤出变形粉末，助挤剂重量比例为20％，防挤出变形粉末的重量比例为40％，倒入已加入主树脂的桶中，旋紧桶盖，将混料后的桶固定在混料机上，开启混料机混合，得到混合料。其中助挤剂包括石油醚、航空煤油或异构烷烃。其中防挤出变形粉末包括陶瓷粉和轻质碳酸钙，陶瓷粉为钛酸类陶瓷粉和/或二氧化硅类陶瓷粉。钛酸类、二氧化硅类陶瓷粉的加入还可以提高和调整介电常数，保证介电性能的稳定性，可以应用于5G信号的传输方面。
(3)将混合料用包装膜密封置于桶内，将桶放置于烘箱中，在55℃条件下进行恒温加热使混合料熟化，熟化时间为40h。
(4)将熟化后的混合料使用振动筛进行过筛，将混合料加入型腔后，利用液压设备带动压块上行初步压缩型腔内的混合料，压力为5MPa，保压时间为5.5min。
(5)如图1和图2所示，利用PTFE分散挤出设备1(或者柱塞挤出设备)将预压坯从口模A1中压缩后挤出，得到异形产品3，同时对异形产品3使用牵引装置2进行牵引，牵引速度为1.775m/min；若异形产品3为对称样式，对异形产品3进行定向牵引时，牵引装置2的牵引导向需要正对产品对称轴；其中PTFE分散挤出设备1的挤出压力为50MPa，挤出速度为1.725m/min，料腔温度60℃，口模A1温度为60℃。
(6)如图1所示，牵引装置2带动异形产品3垂直进入烧结段5，在高温下除去助挤剂并烧结，烧结段5包括三段温度，温度从上到下分别为：300℃、400℃和400℃；所述烧结段5采用立式炉或者隧道炉。
如图2所示，其中PTFE分散挤出设备1上的口模A1和芯模A2的锥角范围均为30°，增加材料压缩力使得挤出的更密实，口模A1平直段和芯模A2平直段的配合长度为12mm，芯模A2凸出口模A1的长度为2cm，所述牵引装置2与口模A1的距离为12cm。本实施PTFE分散挤出设备1上的口模A1和芯模A2之间的间距可调节，通过调节螺栓A3对口模A1和芯模A2之间的间距进行调节可以消除挤出扭曲，保证产品壁厚均匀。
本实施例的所述PTFE分散挤出设备1和烧结段5之间还设有除静电装置4，所述除静电装置4用于除去异形产品3上的静电，避免静电使异形件在烧结段5贴壁。
实施例3：
一种用于通信领域的异形管件成型方法，包括以下步骤：
(1)清理筛网，将空专用桶放于振动筛出料口，开启振动筛后，倒入PTFE分散树脂，将大的杂质和结团分离掉。
(2)电子秤称取空专用桶，去皮，在桶中倒入重量比例为50％的PTFE分散树脂，量杯取出指定重量的助挤剂和防挤出变形粉末，助挤剂重量比例为30％，防挤出变形粉末的重量比例为20％，倒入已加入主树脂的桶中，旋紧桶盖，将混料后的桶固定在混料机上，开启混料机混合，得到混合料。其中助挤剂包括石油醚、航空煤油或异构烷烃。其中防挤出变形粉末包括陶瓷粉和轻质碳酸钙，陶瓷粉为钛酸类陶瓷粉和/或二氧化硅类陶瓷粉。钛酸类、二氧化硅类陶瓷粉的加入还可以提高和调整介电常数，保证介电性能的稳定性，可以应用于5G信号的传输方面。
(3)将混合料用包装膜密封置于桶内，将桶放置于烘箱中，在80℃条件下进行恒温加热使混合料熟化，熟化时间为60h。
(4)将熟化后的混合料使用振动筛进行过筛，将混合料加入型腔后，利用液压设备带动压块上行初步压缩型腔内的混合料，压力为8MPa，保压时间为10min。
(5)如图1和图2所示，利用PTFE分散挤出设备1(或者柱塞挤出设备)将预压坯从口模A1中压缩后挤出，得到异形产品3，同时对异形产品3使用牵引装置2进行牵引，牵引速度为3.05m/min；若异形产品3为对称样式，对异形产品3进行定向牵引时，牵引装置2的牵引导向需要正对产品对称轴；其中PTFE分散挤出设备1的挤出压力为70MPa，挤出速度为3m/min，料腔温度80℃，口模A1温度为80℃。
(6)如图1所示，牵引装置2带动异形产品3垂直进入烧结段5，在高温下除去助挤剂并烧结，烧结段5包括三段温度，温度从上到下分别为：310℃、410℃和410℃；所述烧结段5采用立式炉或者隧道炉。
如图2所示，其中PTFE分散挤出设备1上的口模A1和芯模A2的锥角范围均为40°，增加材料压缩力使得挤出的更密实，口模A1平直段和芯模A2平直段的配合长度为12cm，芯模A2凸出口模A1的长度为5cm，所述牵引装置2与口模A1的距离为12cm。本实施PTFE分散挤出设备1上的口模A1和芯模A2之间的间距可调节，通过调节螺栓A3对口模A1和芯模A2之间的间距进行调节可以消除挤出扭曲，保证产品壁厚均匀。
本实施例的所述PTFE分散挤出设备1和烧结段5之间还设有除静电装置4，所述除静电装置4用于除去异形产品3上的静电，避免静电使异形件在烧结段5贴壁。
上述实施例制成的产品经过检测，得到下表数据：
  实施例1 实施例2 实施例3
拉伸强度 25MPa 30MPa 35MPa
断裂伸长率 320％ 300％ 300％
溶剂是否脱除干净 是 是 是
形状 稳定，不扭曲 稳定，不扭曲 稳定，不扭曲
综上所述，通过利用可以纤维化的PTFE分散树脂进行分散挤出、在PTFE分散树脂中添加防挤出变形粉末以及通过导向牵引解决了现有技术中PTFE制作的产品尺寸变化大，容易变形的缺陷。通过对PTFE分散树脂过筛、对熟化后的混合料过筛，去除了颗粒大的材料：利用液压设备对熟化后的混合料初步压缩，再通过PTFE分散挤出设备1挤出；避免了后期产品中的孔隙、开裂等缺陷。
本发明的保护范围包括但不限于以上实施方式，本发明的保护范围以权利要求书为准，任何对本技术做出的本领域的技术人员容易想到的替换、变形、改进均落入本发明的保护范围。

Claims (10)

  1. 一种用于通信领域的异形管件成型方法，其特征在于：包括以下步骤：
    (1)将PTFE分散树脂放入振动筛上，将大的杂质和结团分离掉；
    (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)对挤出的异形产品除助挤剂并进行烧结。
  2. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述的步骤(2)具体为：
    将PTFE分散树脂、助挤剂、防挤出变形粉末通过混料机混合，得到混合料。
  3. 根据权利要求2所述的用于通信领域的异形管件成型方法，其特征在于：其中助挤剂包括石油醚、航空煤油或异构烷烃。
  4. 根据权利要求3所述的用于通信领域的异形管件成型方法，其特征在于：其中防挤出变形粉末包括陶瓷粉和轻质碳酸钙，陶瓷粉为钛酸类陶瓷粉或二氧化硅类陶瓷粉。
  5. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述的步骤(3)具体为：
    将混合料密封置于桶内，将桶放置于烘箱中，在30℃～80℃条件下进行恒温加热使混合料熟化，熟化时间为20h～60h。
  6. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述的步骤(4)具体为：
    将熟化后的混合料使用振动筛进行过筛，将混合料加入型腔后，利用液压设备初步压缩型腔内的混合料，压力为2MPa～8MPa，保压时间为1min～10min。
  7. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述的步骤(5)具体为：
    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，同时对异形产品使用牵引装置进行牵引，牵引速度为0.5m/min～3.05m/min；若异形产品为对称样式，对异形产品进行定向牵引时，牵引装置的牵引导向需要正对产品对称轴；其中PTFE分散挤出设备的挤出压力为30MPa～70MPa，挤出速度为0.45m/min～3m/min，料腔温度40℃～80℃，口模温度为40℃～80℃。
  8. 根据权利要求7所述的用于通信领域的异形管件成型方法，其特征在于：所述PTFE 分散挤出设备上的口模和芯模的锥角范围均为20°～40°，口模平直段和芯模平直段的配合长度不小于10mm，芯模凸出口模的长度不大于5cm，所述牵引装置与口模的距离不小于10cm。
  9. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述的步骤(6)具体为：
    牵引装置带动异形产品垂直进入烧结段，在高温下除去助挤剂并烧结，烧结段包括三段温度，温度从上到下分别为：300±10℃、400±10℃和400±10℃；所述烧结段采用立式炉或者隧道炉。
  10. 根据权利要求1所述的用于通信领域的异形管件成型方法，其特征在于：所述PTFE分散挤出设备和烧结段之间还设有除静电装置，所述除静电装置用于除去异形产品上的静电。
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CN112643984A (zh) * 2020-12-29 2021-04-13 南京肯特复合材料股份有限公司 一种用于通信领域的异形管件成型方法

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