CN201120716Y - 用于pvc电缆料生产的双螺杆挤出机螺杆 - Google Patents

用于pvc电缆料生产的双螺杆挤出机螺杆 Download PDF

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Publication number
CN201120716Y
CN201120716Y CNU2007203021486U CN200720302148U CN201120716Y CN 201120716 Y CN201120716 Y CN 201120716Y CN U2007203021486 U CNU2007203021486 U CN U2007203021486U CN 200720302148 U CN200720302148 U CN 200720302148U CN 201120716 Y CN201120716 Y CN 201120716Y
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threaded rod
threaded
pvc cable
screw rod
spiral shell
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CNU2007203021486U
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何军
陈文卿
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Zhejiang Wanma Macromolecule Material Co., Ltd.
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ZHEJIANG WANMA MACROMOLECULE MATERIAL CO Ltd
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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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/54—Screws with additional forward-feeding elements
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/55—Screws having reverse-feeding elements

Abstract

本实用新型涉及一种用于PVC生产的双螺杆挤出机的螺杆组合结构。所要解决的技术问题是提供的螺杆应具有适合PVC电缆料生产的剪切和混炼效果，并且生产效率高、操作方便。本实用新型采用的技术方案是：用于PVC电缆料生产的双螺杆挤出机螺杆，包括螺杆轴芯和叠合并串套安装在轴芯外部的若干螺块，螺块又包括螺纹块及剪切块，所述的螺杆上还串套夹装有至少一个密炼机转子，这些密炼机转子分隔穿插在所述的螺块中间。所述的密炼机转子叠加后的轴向总长度占螺杆螺块总长度的六分之一至七分之一。

Description

用于PVC电缆料生产的双螺杆挤出机螺杆
技术领域
本实用新型涉及一种螺杆结构，尤其用于PVC生产的双螺杆挤出机的螺杆组合结构。
背景技术
目前国内PVC电缆料的生产一般采用开炼机、密炼机和单螺杆的一种或几种组合的工艺进行生产。PVC电缆料属于剪切敏感物料，需要强混炼弱剪切的加工工艺。按照工艺配方组成的各种原料需搅拌混合均匀，且在一定的温度、压力下进行塑化，才能获得所需性能的电缆料。密炼机虽属于弱剪切强混炼的设备，然而其生产效率不高。
而采用双螺杆技术生产具有生产效率高、工艺控制自动化程度高，操作人员劳动强度低的优势。随着双螺杆技术的逐步成熟，人们开始尝试采用双螺杆挤出机生产PVC电缆料。
但双螺杆挤出机属于强剪切弱混炼的设备；人们目前是采用剪切块和螺纹块的不同组合来调节对原料的剪切强度和混炼效果；用双螺杆挤出机来生产PVC电缆料，尚未摸索出成熟的工艺方法。
实用新型内容
本实用新型所要解决的技术问题是克服上述现有技术的不足，提供一种双螺杆挤出机的螺杆的改进，该螺杆应具有适合PVC电缆料生产的剪切和混炼效果，并且生产效率高、操作方便。
本实用新型采用的技术方案是：用于PVC电缆料生产的双螺杆挤出机螺杆，包括螺杆轴芯和叠合并串套安装在轴芯外部的若干螺块，螺块又包括螺纹块及剪切块，所述的螺杆上还串套夹装有至少一个密炼机转子，这些密炼机转子分隔穿插在所述的螺块中间。
所述的密炼机转子叠加后的轴向总长度占螺杆螺块总长度的六分之一至七分之一。
本实用新型把密炼机转子作为双螺杆挤出机的螺块进行相应的组合，使得双螺杆挤出机的混炼效果大为增强；并且由于相应减少了剪切块，剪切作用则又显著减小；这一增一减平衡了原有双螺杆挤出机的剪切作用和混炼作用，使其能够更加适合PVC电缆料的生产；同时保持了双螺杆挤出机的生产效率高、操作方便的特点；受到市场的普遍欢迎。
附图说明
图1是原有的双螺杆机的螺杆主视结构示意图。
图2是本实用新型的主视结构示意图。
具体实施方式
如图1所示的双螺杆挤出机的两个螺杆具有完全相同的结构(为图面清晰，两个螺杆A和B之间特意拉开了距离)，包括螺杆轴芯和叠合并串套安装在轴芯外部的若干若干螺块，螺块又包括螺纹块3、螺纹块4、螺纹块5及剪切块1-1和剪切块1-2。其中的剪切块采用若干片椭圆片叠合排列组合成不同的角度(图1中的两组剪切块1-1和1-2分别由19片以及24片不同厚度的椭圆片叠合而成)，具有较强的剪切作用；而螺纹块则类似于一般的螺杆螺纹。工作时，两个螺杆相互配合，对所加工的物料进行混炼和剪切作用。这是现有的双螺杆挤出机的螺杆结构。
本实用新型所作的改进是在所述的螺杆上还串套夹装有至少一个密炼机转子；密炼机转子多些混炼效果更好。图2所示的实施例中，在两个相同结构的螺杆A1和B1中，分别有两个密炼机转子8分隔穿插在所述的螺块中间。所述的密炼块转子类似正反两个长导程螺纹块的组合，是直接从现有的密炼机上移植过来的；它可在PVC电缆料生产过程中提供强烈的混合效果，但是剪切作用相对比较弱。
密炼机转子的规格、形状以及其轴向长度可根据需要选定。本实用新型推荐：密炼机转子叠加后的轴向总长度占螺杆螺块长度的六分之一至七分之一。另外，剪切块叠加后的轴向总长度应当相应减少(图2所示的每个螺杆中分别装有剪切块2-1、剪切块2-2和剪切块2-3，每组剪切块分别由数量不等的椭圆片叠合而成)。除了密炼机转子和剪切块之外，螺杆上的其余部分均为螺纹块。
螺纹块、密炼机转子、剪切块之间的排列方式及次序根据工艺要求确定。

Claims (2)

1、用于PVC电缆料生产的双螺杆挤出机螺杆，包括螺杆轴芯和叠合并串套安装在轴芯外部的若干螺块，螺块又包括螺纹块及剪切块，所述的螺杆上还串套夹装有至少一个密炼机转子(8)，这些密炼机转子分隔穿插在所述的螺块中间。
2、根据权利要求1所述的用于PVC电缆料生产的双螺杆挤出机螺杆，其特征在于所述的密炼机转子叠加后的轴向总长度占螺杆螺块总长度的六分之一至七分之一。
CNU2007203021486U 2007-10-29 2007-10-29 用于pvc电缆料生产的双螺杆挤出机螺杆 Expired - Lifetime CN201120716Y (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700109A (zh) * 2012-06-19 2012-10-03 苏州博云塑业有限公司 啮合同向双螺杆挤出机用螺杆
CN106313476A (zh) * 2015-06-18 2017-01-11 合肥杰事杰新材料股份有限公司 一种用于双螺杆挤出机的密炼转子元件及螺杆组合

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700109A (zh) * 2012-06-19 2012-10-03 苏州博云塑业有限公司 啮合同向双螺杆挤出机用螺杆
CN106313476A (zh) * 2015-06-18 2017-01-11 合肥杰事杰新材料股份有限公司 一种用于双螺杆挤出机的密炼转子元件及螺杆组合

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Address after: 311301, No. 63, South Ring Road, Ling'an Economic Development Zone, Zhejiang

Patentee after: Zhejiang Wanma Macromolecule Material Co., Ltd.

Address before: 311300 No. 2 Wan Road, Zhejiang, Ling'an

Patentee before: Zhejiang Wanma Macromolecule Material Co., Ltd.

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Granted publication date: 20080924