CN202623248U - 一种双螺杆塑料挤出机用螺杆 - Google Patents

一种双螺杆塑料挤出机用螺杆 Download PDF

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Publication number
CN202623248U
CN202623248U CN2012200346519U CN201220034651U CN202623248U CN 202623248 U CN202623248 U CN 202623248U CN 2012200346519 U CN2012200346519 U CN 2012200346519U CN 201220034651 U CN201220034651 U CN 201220034651U CN 202623248 U CN202623248 U CN 202623248U
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China
Prior art keywords
screw
plastifying
zone
pvc
twin
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Expired - Fee Related
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CN2012200346519U
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English (en)
Inventor
蔡炳然
黄铭生
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Guangdong Liansu Machinery Manufacturing Co Ltd
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Guangdong Liansu Machinery Manufacturing Co Ltd
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/64Screws with two or more threads
    • B29C48/655Screws with two or more threads having three or more threads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means 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
    • B29C48/40Means 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/575Screws provided with elements of a generally circular cross-section for shearing the melt, i.e. shear-ring elements

Abstract

本实用新型涉及塑料成型设备,特别是一种双螺杆塑料挤出机用螺杆,包括依次连接的进料段、过渡段、塑化段、滞留段、排气段和挤出段,所述塑化段的螺牙边缘开有回流槽。本实用新型塑化段的螺牙边缘开有回流槽,材料可以反复在塑化段来回流动,使得材料充分混合均匀,有利于物料的塑化和混炼。能满足高填充配方(碳酸钙和PVC粉料的比例超过50%)生产时管材的质量要求。

Description

一种双螺杆塑料挤出机用螺杆
技术领域
[0001] 本实用新型涉及塑料成型设备,特别是ー种双螺杆塑料挤出机用螺杆。
背景技术
[0002] 国内外大多数厂家生产的锥型双螺杆塑料挤出机,只适合加工中低填充配方的PVC制品,一旦填充高填充配方(碳酸钙含量大于50%,即100份PVC配多于100份的碳酸钙),制得的塑料制品的质量就非常差,无法达到相关标准的要求。而在PVC管材市场,填充料(主要以碳酸钙为主)的比例越来越高,为了保证管材的质量,用于加工PVC管材的设备——锥型双螺杆塑料挤出机的螺杆必须做出相应的改进。中国国家知识产权局在2008年11月19日公开的公告号为CN201151186Y的专利公开了ー种适用于双螺杆塑料挤出机的小锥角锥形螺杆,包括进料段、塑化段、压缩段、排气段和挤出段,具有使用寿命长、背压低、易塑化的优点,但仍无法满足高填充配方的生产要求。
实用新型内容
[0003] 本实用新型提供一种双螺杆塑料挤出机用螺杆,以解决现有技术挤出机用螺杆无法满足高填充配方的技术问题。
[0004] 采用的技术方案如下:
[0005] 一种双螺杆塑料挤出机用螺杆,包括依次连接的进料段、过渡段、塑化段、滞留段、排气段和挤出段,所述塑化段的螺牙边缘开有回流槽。
[0006] 进ー步的,所述回流槽为弧形。
[0007] 进ー步的,所述双螺杆塑料挤出机用螺杆为锥形。
[0008] 本实用新型塑化段的螺牙边缘开有回流槽,材料可以反复在塑化段来回流动,使得材料充分混合均匀,有利于物料的塑化和混炼。能满足高填充配方(碳酸钙和PVC粉料的比例超过50%)生产时管材的质量要求。
附图说明
[0009] 图I本实用新型实施例的结构示意图;
[0010] 图2为图I的结构剖面图;
[0011] 图3为图I的A-A剖面图;
[0012] 图4为图I的B-B剖面图。
具体实施方式
[0013] 下面结合附图和具体实施例对本实用新型做进ー步详细的说明。
[0014] 如图I和图2所示,本实施例为ー种双螺杆塑料挤出机用锥形螺杆,包括依次连接的进料段I、过渡段2、塑化段3、滞留段4、排气段5和挤出段6,所述塑化段的螺牙边缘开有回流槽7。塑化段3的导程比常规短,滞留段4的导程比常规短。[0015] 工作原理:生产PVC管材,由于填充料的不同,需要设计不同的螺杆,保证PVC和添加剂的填充料的充分混合,从而保证管材的质量。当机筒开始加热到PVC粉料的塑化工艺温度,并把温度传递到螺杆后,到达同样的エ艺温度后,填充料(例如碳酸钙)和PVC粉料从进料段I开始进入机筒,经过过渡段2、塑化段3、滞留段4和排气段5,从挤出段6出料。进入塑化段3后,由于塑化段3的导程比常规短,填充料和PVC粉料停留在螺杆混料的时间会比常规长,且带有回流槽7,物料可以反复在塑化段来回流动,使填充料和PVC粉料混炼的效果更好。充分混合后,混合物料进入滞留段4,该段的导程也比常规短,使物料在塑化段和滞留段形成更高的压力,有利干物料的塑化和混炼。混合物料通过这两段的塑化和混炼之后,充分塑化,经过排气段5和挤出段6的输送,就可以通过模具成型。这样,在碳酸钙和PVC粉料的比例很高的时候,也能得到较好质量的管材。
[0016] 在PVC管材市场,由于生产PVC管材的配方中,填充料(主要以碳酸钙为主)的比例越来越高,为了保证管材的质量,用于加工PVC管材的设备一锥型双螺杆挤出机的螺杆必 须做出相应的改进。
[0017] 本实用新型的结构就是专门用于加工高填充配方(碳酸钙含量大于50%,即100份PVC配多于100份的碳酸钙)的。本实用新型设计了塑化段和滞留段的导程比常规的小,并且带回流槽;导程小,填充料和PVC粉料停留在螺杆混炼的时间长;带回流槽,材料可以反复在塑化段来回流动;螺杆的这两种特性使材料混合得比较充分。

Claims (3)

1. 一种双螺杆塑料挤出机用螺杆,其特征在于,包括依次连接的进料段(I)、过渡段(2)、塑化段(3)、滞留段(4)、排气段(5)和挤出段(6),所述塑化段(3)的螺牙边缘开有回流槽(7)。
2.根据权利要求I所述的双螺杆塑料挤出机用螺杆,其特征在于,所述回流槽(7)为弧形。
3.根据权利要求I所述的双螺杆塑料挤出机用螺杆,其特征在于,所述双螺杆塑料挤出机用螺杆为锥形。
CN2012200346519U 2012-02-03 2012-02-03 一种双螺杆塑料挤出机用螺杆 Expired - Fee Related CN202623248U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104690943B (zh) * 2014-03-19 2018-04-13 保定东禾新型材料科技有限公司 一种挤出机用锥形螺杆

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104690943B (zh) * 2014-03-19 2018-04-13 保定东禾新型材料科技有限公司 一种挤出机用锥形螺杆

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Granted publication date: 20121226

Termination date: 20180203