CN105799137A - 无钢衬pvc异型材生产方法及其加工模具 - Google Patents

无钢衬pvc异型材生产方法及其加工模具 Download PDF

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CN105799137A
CN105799137A CN201610236217.1A CN201610236217A CN105799137A CN 105799137 A CN105799137 A CN 105799137A CN 201610236217 A CN201610236217 A CN 201610236217A CN 105799137 A CN105799137 A CN 105799137A
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pvc
wpc
runner
steel lining
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柯友军
何浩
江长焱
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Huangshi Hongda Plastic Mould Co Ltd
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    • 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
    • B29C48/92Measuring, controlling or regulating
    • 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
    • B29C48/15Extrusion 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
    • 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
    • B29C48/30Extrusion nozzles or dies
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06Homopolymers or copolymers of vinyl chloride
    • 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
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92514Pressure
    • 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
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/9258Velocity
    • 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
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92704Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06PVC, i.e. polyvinylchloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/14Applications used for foams
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/14Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16Fibres; Fibrils
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

本发明涉及PVC型材生产领域,具体是无钢衬PVC异型材生产方法及其加工模具。无钢衬PVC异型材加工模具,包括模具主体、WPC共挤流道和PVC通道,所述WPC共挤流道整体呈直线贯通模具主体,依次设有WPC进料口、芯体间隙分道、压缩段、稳定段和WPC供料流道;所述PVC通道包括PVC进料口、减压角、减压流道、PVC供料流道,PVC进料口与WPC共挤流道相互垂直,通过减压角、减压流道转向并连接PVC供料流道,PVC供料流道出口与WPC供料流道出口趋于水平。

Description

无钢衬PVC异型材生产方法及其加工模具
技术领域
[0001]本发明涉及PVC型材生产领域,具体是无钢衬PVC异型材生产方法及其加工模具。
背景技术
[0002]塑钢门窗现已成为畅销建材之一,虽然人们已经了解到塑钢门窗的保温、隔音、耐老化等方面均优于其他材质的门窗。塑钢门窗的配方是硬质PVC聚氯乙烯型材,在其制造的过程中需要加入树脂、添加剂等,由于配方不同,会直接影响到型材抗紫外线、抗老化的能力,以及型材的强度。另外,不管是窗框还是窗扇,四条边里普遍添加钢衬,以增强门窗的抗风压强度,抗拉等性能。PVC是使用最广泛的塑料之一,PVC材料是一种非结晶性材,树脂分子链中大多数是头-尾结构,只有少数的头-头结构和尾-尾结构。工业生产的PVC的聚合度在500-2000之间。
[0003]现在塑钢门窗中所用的钢衬都必须达到一定的厚度,增加了型材的整体成本和重量。钢衬的防腐、防锈处理镶钢衬工序繁锁,增加了制造时间和成本。
发明内容
[0004]本发明旨在提供一种无钢衬的PVC异型材的生产方法,用材环保成本低,生产方法简单,并提供一种结构简单用于PVC异型材生产的加工模具。
[0005]为克服现有技术的缺点,本发明提供的技术方案如下:
[0006]本发明第一个目的提供无钢衬PVC异型材生产方法,包括工艺步骤如下:
[0007] (I)将WPC循环料按配方比例加入混料机,经物料自摩擦升温至110-130度,然后经冷凝机冷却至40-50度后加入主料斗;
[0008] (2)将PVC料按配方比例加入混料机,经物料自摩擦升温至110-130度,然后经冷凝机冷却至40-50度后加入副料斗;
[0009] (3 )WPC循环料与PVC料两分别通过两台挤出机共挤进入异型材加工模具,WPC循环料通过模具中的WPC共挤流道形成芯体,PVC料分别通过模具中的PVC异形型材流道与PVC包裹料流道进行型材外部PVC成型与PVC的包覆,形成型材I;挤出机螺杆温度为85-95度,挤出压力为8_16mpa;
[0010] (4)型材I通过定型模进行真空吸附处理,真空度0.035-0.070Mpa,形成型材II;
[0011] (5)对型材II进行水冷却后牵引拉出,牵引速度比挤出线速度快1.5%-2.5%;
[0012] (6)对步骤(5)牵引拉出的型材进行切割,检测包装。
[0013]优选的,所述WPC循环料配方为:聚氯乙烯90-110份、轻质碳酸钙45-55份、木粉8-12份、碳纤维8-12份、增塑剂1.2-1.8份、复合铅盐稳定剂5.5-7份、发泡调节剂3-5份、AC发泡剂0.2-0.3份、NC发泡剂0.25-0.35份、内润滑剂0.4-0.6份、外润滑剂0.18-0.22份、CPE-135A 4-6份、ACRl 75 2-3份。
[0014] 优选的,所述PVC料配方为:聚氯乙烯90-110份、钙粉45-55份、CPE-135A 7-9份、稳定剂 4-6 份、ACR-400 1.5-2.3份、PE 蜡 0.45-0.5 份、硬脂酸 0.38-0.45 份、增白剂0.02-0.08份、钛白粉2-4份。
[0015]更优选的,所述的增塑剂为马来酸酐,所述的内润滑剂为硬脂酸1801,所述的外润滑剂为PE蜡。
[0016]本发明的第二个目的提供无钢衬PVC异型材加工模具,包括模具主体、WPC共挤流道和PVC通道,所述WPC共挤流道整体呈直线贯通模具主体,依次设有WPC进料口、芯体间隙分道、压缩段、稳定段和WPC供料流道;所述PVC通道包括PVC进料口、减压角、减压流道、PVC供料流道,PVC进料口与WPC共挤流道相互垂直,通过减压角、减压流道转向并连接PVC供料流道,PVC供料流道出口与WPC供料流道出口趋于水平。
[0017]优选的,所述的PVC通道分为PVC包裹层流道与PVC异型材成型流道;所述PVC包裹层流道分布在WPC供料流道的顶部和两侧;所述PVC异型材成型流道位于在WPC供料流道的底部。
[0018]优选的,所述模具主体主要由模体、过渡板、支撑板、汇流板、口模板一、口模板二、
口模板三依次层叠连接组成。
[0019]更优选的,所述模体、过渡板、支撑板、汇流板、口模板一、口模板二、口模板三之间采用螺钉连接。
[0020]本发明具有以下有益效果:
[0021 ] 1、无钢衬PVC异型材,生产方式简易,环保耐用。
[0022] 2、生产模具结构简单,生产成本低,适合大范围推广应用。
附图说明
[0023]图1为本发明无钢衬PVC异型材加工模具截面结构示意图。
[0024]图2为本发明无钢衬PVC异型材加工模具正面结构示意图。
具体实施方式
[0025]下面结合实施方式对本发明内容作进一步详细描述。
[0026] 实施例1:
[0027]本实施例提供提供无钢衬PVC异型材生产方法,包括工艺步骤如下:
[0028] (I)将WPC循环料按配方比例加入混料机,经物料自摩擦升温至110度,然后经冷凝机冷却至40度后加入主料斗;
[0029] (2)将PVC料按配方比例加入混料机,经物料自摩擦升温至110度,然后经冷凝机冷却至40度后加入副料斗;
[0030] (3)WPC循环料与PVC料两分别通过两台挤出机共挤进入异型材加工模具,WPC循环料通过模具中的WPC共挤流道形成芯体,PVC料分别通过模具中的PVC异形型材流道与PVC包裹料流道进行型材外部PVC成型与PVC的包覆,形成型材I;挤出机螺杆温度为85度,挤出压力为8mpa;
[0031] (4)型材I通过定型模进行真空吸附处理,真空度0.035Mpa,形成型材II;
[0032] (5)对型材II进行水冷却后牵引拉出,牵引速度比挤出线速度快1.5%%;
[0033] (6)对步骤(5)牵引拉出的型材进行切割,检测包装。
[0034]所述WPC循环料配方为:聚氯乙烯90份、轻质碳酸钙45份、木粉8份、碳纤维8份、增塑剂1.2份、复合铅盐稳定剂5.5份、发泡调节剂3份、AC发泡剂0.2份、NC发泡剂0.25份、内润滑剂0.4份、外润滑剂0.18份、CPE-135A 4份、ACR175 2份。
[0035] 所述PVC料配方为:聚氯乙烯90份、钙粉45份、CPE-135A 7份、稳定剂4份、ACR-4001.5份、PE蜡0.45份、硬脂酸0.38份、增白剂0.02份、钛白粉2份。
[0036]所述的增塑剂为马来酸酐,所述的内润滑剂为硬脂酸1801,所述的外润滑剂为PE蜡。
[0037] 实施例2:
[0038]本实施例提供提供无钢衬PVC异型材生产方法,包括工艺步骤如下:
[0039] (I)将WPC循环料按配方比例加入混料机,经物料自摩擦升温至120度,然后经冷凝机冷却至45度后加入主料斗;
[0040] (2)将PVC料按配方比例加入混料机,经物料自摩擦升温至120度,然后经冷凝机冷却至45度后加入副料斗;
[0041] (3)WPC循环料与PVC料两分别通过两台挤出机共挤进入异型材加工模具,WPC循环料通过模具中的WPC共挤流道形成芯体,PVC料分别通过模具中的PVC异形型材流道与PVC包裹料流道进行型材外部PVC成型与PVC的包覆,形成型材I;挤出机螺杆温度为90度,挤出压力为12mpa;
[0042] (4)型材I通过定型模进行真空吸附处理,真空度0.06Mpa,形成型材II;
[0043] (5)对型材II进行水冷却后牵引拉出,牵引速度比挤出线速度快1.5%%;
[0044] (6)对步骤(5)牵引拉出的型材进行切割,检测包装。
[0045]所述WPC循环料配方为:聚氯乙烯100份、轻质碳酸钙50份、木粉10份、碳纤维10份、增塑剂1.5份、复合铅盐稳定剂6.5份、发泡调节剂4份、AC发泡剂0.25份、NC发泡剂0.3份、内润滑剂0.5份、外润滑剂0.2份、CPE-135A 5份、ACRl 75 2.5份。
[0046] 所述PVC料配方为:聚氯乙烯100份、钙粉50份、CPE-135A 8份、稳定剂5份、ACR-4001.8份、PE蜡0.47份、硬脂酸0.42份、增白剂0.05份、钛白粉3份。
[0047]所述的增塑剂为马来酸酐,所述的内润滑剂为硬脂酸1801,所述的外润滑剂为PE蜡。
[0048] 实施例3:
[0049]本实施例提供提供无钢衬PVC异型材生产方法,包括工艺步骤如下:
[0050] (I)将WPC循环料按配方比例加入混料机,经物料自摩擦升温至130度,然后经冷凝机冷却至50度后加入主料斗;
[0051] (2)将PVC料按配方比例加入混料机,经物料自摩擦升温至130度,然后经冷凝机冷却至50度后加入副料斗;
[0052] (3)WPC循环料与PVC料两分别通过两台挤出机共挤进入异型材加工模具,WPC循环料通过模具中的WPC共挤流道形成芯体,PVC料分别通过模具中的PVC异形型材流道与PVC包裹料流道进行型材外部PVC成型与PVC的包覆,形成型材I;挤出机螺杆温度为95度,挤出压力为16mpa;
[0053] (4)型材I通过定型模进行真空吸附处理,真空度0.07Mpa,形成型材II;
[0054] (5)对型材II进行水冷却后牵引拉出,牵引速度比挤出线速度快2.5%%;
[0055] (6)对步骤(5)牵引拉出的型材进行切割,检测包装。
[0056]所述WPC循环料配方为:聚氯乙烯110份、轻质碳酸钙55份、木粉12份、碳纤维12份、增塑剂1.8份、复合铅盐稳定剂7份、发泡调节剂5份、AC发泡剂0.3份、NC发泡剂0.35份、内润滑剂0.6份、外润滑剂0.22份、CPE-135A 6份、ACRl75 3份。
[0057] 所述PVC料配方为:聚氯乙烯110份、钙粉55份、CPE-135A 9份、稳定剂6份、ACR-4002.3份、PE蜡0.5份、硬脂酸0.45份、增白剂0.08份、钛白粉4份。
[0058]所述的增塑剂为马来酸酐,所述的内润滑剂为硬脂酸1801,所述的外润滑剂为PE蜡。
[0059] 实施例4:
[0060]本实施例提供无钢衬PVC异型材加工模具,如图1所示,包括模具主体1、WPC共挤流道2和PVC通道3,所述WPC共挤流道2整体呈直线贯通模具主体I,依次设有WPC进料口 21、芯体间隙分道22、压缩段23、稳定段24和WPC供料流道25;所述PVC通道3包括PVC进料口 31、减压角32、减压流道33、PVC供料流道34,PVC进料口 31与WPC共挤流道2相互垂直,通过减压角32、减压流道33转向并连接PVC供料流道34,PVC供料流道34出口与WPC供料流道25出口趋于水平。所述模具主体主要由模体4、过渡板5、支撑板6、汇流板7、口模板一8、口模板二9、口模板三1依次层叠连接组成。所述模体4、过渡板5、支撑板6、汇流板7、口模板一8、口模板二9、口模板三1之间采用螺钉连接。
[0061 ] 如图2所示,所述的PVC通道3分为PVC包裹层流道341与PVC异型材成型流道342;所述PVC包裹层流道341分布在WPC供料流道25的顶部和两侧;所述PVC异型材成型流道342位于在WPC供料流道25的底部。
[0062]对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
[0063]此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。

Claims (8)

1.无钢衬PVC异型材生产方法,其特征在于,包括工艺步骤如下: (1)将WPC循环料按配方比例加入混料机,经物料自摩擦升温至110-130度,然后经冷凝机冷却至40-50度后加入主料斗; (2)将PVC料按配方比例加入混料机,经物料自摩擦升温至110-130度,然后经冷凝机冷却至40-50度后加入副料斗; (3)WPC循环料与PVC料两分别通过两台挤出机共挤进入异型材加工模具,WPC循环料通过模具中的WPC共挤流道形成芯体,PVC料分别通过模具中的PVC异形型材流道与PVC包裹料流道进行型材外部PVC成型与PVC的包覆,形成型材I;挤出机螺杆温度为85-95度,挤出压力为8_16mpa; (4)型材I通过定型模进行真空吸附处理,真空度0.035-0.070Mpa,形成型材II ; (5)对型材II进行水冷却后牵引拉出,牵引速度比挤出线速度快1.5%-2.5% ; (6)对步骤(5)牵引拉出的型材进行切割,检测包装。
2.根据权利要求1所述的无钢衬PVC异型材生产方法,其特征在于,所述WPC循环料配方为:聚氯乙烯90-110份、轻质碳酸钙45-55份、木粉8-12份、碳纤维8-12份、增塑剂1.2-1.8份、复合铅盐稳定剂5.5-7份、发泡调节剂3-5份、AC发泡剂0.2-0.3份、NC发泡剂0.25-0.35份、内润滑剂0.4-0.6份、外润滑剂0.18-0.22份、CPE-135A 4-6份、ACRl75 2-3份。
3.根据权利要求1所述的无钢衬PVC异型材生产方法,其特征在于,所述PVC料配方为:聚氯乙烯90-110份、钙粉45-55份、CPE-135A7-9份、稳定剂4-6份、ACR-400 1.5-2.3份、PE蜡0.45-0.5份、硬脂酸0.38-0.45份、增白剂0.02-0.08份、钛白粉2_4份。
4.根据权利要求2所述的无钢衬PVC异型材生产方法,其特征在于,所述的增塑剂为马来酸酐,所述的内润滑剂为硬脂酸1801,所述的外润滑剂为PE蜡。
5.无钢衬PVC异型材加工模具,其特征在于,包括模具主体、WPC共挤流道和PVC通道,所述WPC共挤流道整体呈直线贯通模具主体,依次设有WPC进料口、芯体间隙分道、压缩段、稳定段和WPC供料流道;所述PVC通道包括PVC进料口、减压角、减压流道、PVC供料流道,PVC进料口与WPC共挤流道相互垂直,通过减压角、减压流道转向并连接PVC供料流道,PVC供料流道出口与WPC供料流道出口趋于水平。
6.根据权利要求5所述的无钢衬PVC异型材加工模具,其特征在于,所述的PVC通道分为PVC包裹层流道与PVC异型材成型流道;所述PVC包裹层流道分布在WPC供料流道的顶部和两侧;所述PVC异型材成型流道位于在WPC供料流道的底部。
7.根据权利要求5所述的无钢衬PVC异型材加工模具,其特征在于,所述模具主体主要由模体、过渡板、支撑板、汇流板、口模板一、口模板二、口模板三依次层叠连接组成。
8.根据权利要求7所述的无钢衬PVC异型材加工模具,其特征在于,所述模体、过渡板、支撑板、汇流板、口模板一、口模板二、口模板三之间采用螺钉连接。
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