CN107914373A - 一种衬氟塑阀门热模注塑工艺 - Google Patents

一种衬氟塑阀门热模注塑工艺 Download PDF

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Publication number
CN107914373A
CN107914373A CN201610880482.3A CN201610880482A CN107914373A CN 107914373 A CN107914373 A CN 107914373A CN 201610880482 A CN201610880482 A CN 201610880482A CN 107914373 A CN107914373 A CN 107914373A
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Prior art keywords
lined
valve
mould
fluoroplastic
shooting technique
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CN201610880482.3A
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盛尖峰
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Suzhou Bailey Fluorine Plastic Products Co Ltd
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Suzhou Bailey Fluorine Plastic Products Co Ltd
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Priority to CN201610880482.3A priority Critical patent/CN107914373A/zh
Publication of CN107914373A publication Critical patent/CN107914373A/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/74—Heating or cooling of the injection unit
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7375—Heating or cooling of the mould heating a mould surface by a heated gas
    • B29C2045/7381—Heating or cooling of the mould heating a mould surface by a heated gas heating by gas combustion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/7506—Valves

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

本发明公开了一种衬氟塑阀门热模注塑工艺,包括以下步骤：1、对阀门铸件进行除锈，并将阀门铸件装配到模具中；2、对所述模具进行加热，加热温度为395～400℃，加热时间为2小时；3、通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为16～20MPa；4、冷却脱模，得到衬氟塑阀门。本发明工艺合理，生产效率高，能耗低，成品率高。

Description

一种衬氟塑阀门热模注塑工艺
技术领域
本发明涉及阀门制造领域，尤其涉及一种衬氟塑阀门热模注塑工艺。
背景技术
衬氟阀门又称氟塑料衬里耐腐阀门，是将氟塑料(或型材经加工)采用模压(或镶嵌)方法置于钢质或铁质的阀门承压件的内壁(同样的方法适用于各类压力容器及管路附件的内衬)或阀门内件的外表面，利用其在抗强腐蚀介质方面的独特性能制做成各类阀门和压力容器。传统的衬氟塑阀门生产工艺包括以下流程：阀门铸件除锈-模具装配-填加FEP粉料-电热烘箱整体加热-保压成型-冷却脱模。上述流程存在以下问题：1、加工周期长，加工周期在3.5小时左右；2、每个进行填装和加热，分步间隙性生产方式效率低；3、原材料消耗大；4、加热过程中温度波动大，易导致材料过热分解、改性等问题；5、在加热塑化过程中有大量剧毒氟化氢气体散发，污染环境，造成职业危害。
发明内容
发明目的：本发明为解决上述问题，提供了一种衬氟塑阀门热模注塑工艺。
技术方案：一种衬氟塑阀门热模注塑工艺,包括以下步骤：
步骤1，对阀门铸件进行除锈，并将阀门铸件装配到模具中；
步骤2，对所述模具进行加热，加热温度为395～400℃，加热时间为2小时；
步骤3，通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为16～20MPa；
步骤4，冷却脱模，得到衬氟塑阀门。
作为本发明的一种优选方案，步骤4中冷却到200℃以下脱模。
作为本发明的一种优选方案，对所述模具进行加热，采用燃气直热式烘道，步骤3在所述燃气直热式烘道内进行。
有益效果：本发明与现有技术相比，其优点在于：
1、加热时间平均缩短了1.5小时左右；
2、可以进行流水线连续生产，提高工效可达60％；
3、定量注塑FEP物料无浪费；
4、通过注塑机进行加热注塑，实现了均匀、恒温，从本质上保证了氟塑材料的稳定性，杜绝高温分解的现象；
5、整个加热成型过程都在燃气直热式烘道内进行，防止有害气体泄漏，只需将有害气体定向回收，杜绝有害气体泄漏污染环境的风险。
具体实施方式
下面结合具体实施方式，进一步阐明本发明。
实施例1
本发明公开了一种衬氟塑阀门热模注塑工艺,包括以下步骤：
步骤1，对阀门铸件进行除锈，并将阀门铸件装配到模具中；
步骤2，对所述模具进行加热，加热温度为395℃，加热时间为2小时；
步骤3，通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为20MPa；
步骤4，冷却脱模，冷却到200℃进行脱模，得到衬氟塑阀门。
实施例2
本发明公开了一种衬氟塑阀门热模注塑工艺,包括以下步骤：
步骤1，对阀门铸件进行除锈，并将阀门铸件装配到模具中；
步骤2，对所述模具进行加热，加热温度为400℃，加热时间为2小时；
步骤3，通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为16MPa；
步骤4，冷却到200℃以下脱模，得到衬氟塑阀门。
实施例3
本发明公开了一种衬氟塑阀门热模注塑工艺,包括以下步骤：
步骤1，对阀门铸件进行除锈，并将阀门铸件装配到模具中；
步骤2，对所述模具进行加热，采用燃气直热式烘道进行加热，加热温度为398℃，加热时间为2小时；
步骤3，在燃气直热式烘道内通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为18MPa；
步骤4，冷却脱模，得到衬氟塑阀门。
对实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (3)

1.一种衬氟塑阀门热模注塑工艺,其特征在于，包括以下步骤：
步骤1，对阀门铸件进行除锈，并将阀门铸件装配到模具中；
步骤2，对所述模具进行加热，加热温度为395～400℃，加热时间为2小时；
步骤3，通过注塑机对所述模具内注塑熔融的FEP流体，注塑温度为330℃，然后保压成型，压力为16～20MPa；
步骤4，冷却脱模，得到衬氟塑阀门。
2.根据权利要求1所述的衬氟塑阀门热模注塑工艺,其特征在于，步骤4中冷却到200℃以下脱模。
3.根据权利要求1所述的衬氟塑阀门热模注塑工艺,其特征在于，对所述模具进行加热，采用燃气直热式烘道，步骤3在所述燃气直热式烘道内进行。
CN201610880482.3A 2016-10-09 2016-10-09 一种衬氟塑阀门热模注塑工艺 Pending CN107914373A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111844610A (zh) * 2020-07-15 2020-10-30 无锡市伟业化工防腐设备厂 钢衬一体注塑模压pfa管板的制造方法
CN113021755A (zh) * 2021-02-26 2021-06-25 苏州可邦自控阀业有限公司 一种衬氟阀门的生产方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111844610A (zh) * 2020-07-15 2020-10-30 无锡市伟业化工防腐设备厂 钢衬一体注塑模压pfa管板的制造方法
CN113021755A (zh) * 2021-02-26 2021-06-25 苏州可邦自控阀业有限公司 一种衬氟阀门的生产方法

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