CN107803967A - 一种注塑高光产品无保压成型工艺 - Google Patents

一种注塑高光产品无保压成型工艺 Download PDF

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CN107803967A
CN107803967A CN201711020723.8A CN201711020723A CN107803967A CN 107803967 A CN107803967 A CN 107803967A CN 201711020723 A CN201711020723 A CN 201711020723A CN 107803967 A CN107803967 A CN 107803967A
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黄建锋
冯文成
杨军
吕凡磊
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Guangzhou China New Beijing Great Automotive Components 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/77Measuring, controlling or regulating of velocity or pressure of moulding material
    • 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/78Measuring, controlling or regulating of temperature
    • 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
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76498Pressure
    • 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
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76531Temperature
    • 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
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76551Time
    • B29C2945/76561Time duration

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

Abstract

本发明涉及一种注塑高光产品无保压成型工艺,包括以下步骤:选取注射树脂材料,对其进行烘干和抽湿;对模具进行预热处理;将注射树脂材料加热至成型温度;合模,向模具中注入熔融状态的注射树脂材料;注塑完成后,向模具中通入冷却水,冷却后产品定型;开模,取出成品。本发明通过调试注塑成型工艺,发现一种在无保压注塑的成型工艺下生产高光产品的方法,通过此方法得到的产品无表面缩水;无保压成型减少了产品的应力,产品成型过程不易断裂,提高了成品率;此外,成型过程中对料筒使用多段式加热,节约能源,降低了成本。

Description

一种注塑高光产品无保压成型工艺
技术领域
本发明涉及注塑领域,特别涉及一种注塑高光产品的无保压成型工艺。
背景技术
注塑可满足工业产品结构、尺寸、形状等各方面的塑造需求,而且注塑过程速度快、效率高、可自动化,因此广泛应用于各种工业产品的加工和生产。随着消费者对产品的美观、手感等方面的追求不断增加,工业上对产品注塑的要求也越来越高,尤其是高光产品。
现有注塑高光产品的工艺过程中必须通过保压成型来消除产品表面缩水,达到高光无痕的效果,然而保压成型过程给产品施加了额外的应力,容易导致产品断裂,降低了成品率,增加了成本。
发明内容
为解决注塑高光产品过程中保压成型容易导致产品断裂的问题,本发明提供一种注塑高光产品无保压成型工艺。
本发明的技术方案如下:
一种注塑高光产品无保压成型工艺,包括以下步骤:
S1、选料:选取PMMA(Polymethyl Methacrylate,聚甲基丙烯酸甲酯,简称PMMA)作为注射树脂材料;
S2、烘干:将上述注塑树脂材料进行烘干抽湿处理;
S3、模具预热:对模具进行预热处理,预热运水设为90℃,预热时间为30分钟;
S4、材料预热:将注射树脂材料加热至熔融温度;
S5、合模:模具预热达到90℃后进行合模;
S6、注塑:向模具中注入熔融状态的注射树脂材料,注塑参数设置如下:射胶压力,200MPa;射胶速度,第一段35mm/s,第二段15mm/s,第三段10mm/s,第四段10mm/s,第五段10mm/s;射胶位置:第一段100mm,第二段30mm,第三段27mm,第四段27mm,第五段27mm;射胶时间,8s;熔胶压力120MPa;熔胶速度,75mm/s;熔胶位置,150mm;背压10MPa;保压压力,0MPa;保压时间,0s。
S7、冷却:向模具中通入90℃的运水,使模具温度保持在90℃左右,冷却时间为55~65s;
S8、开模:模具将成品顶出,取出成品。
优选地,所述步骤S2中,烘干温度为80℃,预热时间为3小时,使注射树脂材料完全干燥;
优选地,所述步骤S4中温度为220-260℃,使注射树脂材料处于熔融状态;
优选地,所述步骤S4为分段式加热,料筒第一段加热至245℃,料筒第二段加热至245℃,料筒第三段加热至245℃,料筒第四段加热至230℃,料筒第五段加热至230℃。此过程中对料筒使用多段式加热,节约能源,降低了成本。
优选地,所述步骤S7中的冷却时间为60s。
与现有技术相比,本发明的有益效果如下:通过此工艺得到的产品无表面缩水、光泽度高、无缺陷,并且过程中无需进行保压成型,避免了对产品施加额外的应力而发生产品断裂的现象,增加了成品率。
具体实施方式
下面结合实施例对本发明的具体实施方式作详细描述,以下实施例用于说明本发明,但不用来限制本发明的范围。
实施例1:
一种注塑高光产品无保压成型工艺,包括以下步骤:
S1、选料:选取PMMA作为注射树脂材料,烘干温度为80℃,预热时间为3小时;
S2、烘干:将上述注射树脂材料进行烘干抽湿处理;
S3、模具预热:对模具进行预热处理,预热运水设为90℃,预热时间为30分钟;
S4、材料预热:将注射树脂材料加热至熔融温度,熔融温度为220-260℃;
S5、合模:模具预热达到90℃后进行合模;
S6、注塑:向模具中注入熔融状态的注射树脂材料,经过多次不断地调试不同的注塑成型工艺,最终调试出一种在无保压成型工艺,其注塑参数设置如下:射胶压力,200MPa;射胶速度,第一段35mm/s,第二段15mm/s,第三段10mm/s,第四段10mm/s,第五段10mm/s;射胶位置:第一段100mm,第二段30mm,第三段27mm,第四段27mm,第五段27mm;射胶时间,8s;熔胶压力120MPa;熔胶速度,75mm/s;熔胶位置,150mm;背压10MPa;保压压力,0MPa;保压时间,0s。
S7、冷却:向模具中通入90℃的运水,使模具温度保持在90℃左右,冷却时间为60s;
S8、开模:模具将成品顶出,取出成品。
实施例2:
S1、选料:选取PMMA作为注射树脂材料,烘干温度为80℃,预热时间为3小时;
S2、烘干:将上述注射树脂材料进行烘干抽湿处理;
S3、模具预热:对模具进行预热处理,预热运水设为95℃,预热时间为30分钟;
S4、材料预热:将注射树脂材料加热至熔融温度,料筒第一段加热至245℃,料筒第二段加热至245℃,料筒第三段加热至245℃,料筒第四段加热至230℃,料筒第五段加热至230℃。此过程中对料筒使用多段式加热,节约能源,降低了成本。
S5、合模:模具预热达到90℃后进行合模;
S6、注塑:向模具中注入熔融状态的注射树脂材料,经过多次不断地调试不同的注塑成型工艺,最终调试出一种在无保压成型工艺,其注塑参数设置如下:射胶压力,200MPa;射胶速度,第一段35mm/s,第二段15mm/s,第三段10mm/s,第四段10mm/s,第五段10mm/s;射胶位置:第一段100mm,第二段30mm,第三段27mm,第四段27mm,第五段27mm;射胶时间,8s;熔胶压力120MPa;熔胶速度,75mm/s;熔胶位置,150mm;背压10MPa;保压压力,0MPa;保压时间,0s。
S7、冷却:向模具中通入90℃的运水,使模具温度保持在90℃左右,冷却时间为60s;
S8、开模:模具将成品顶出,取出成品。
上述实施方式中,生产得到的高光产品符合外观、强度标准,有效减少产品的断裂,增加成品率,降低成本。
以上所述为本发明的优选实施方式,并不限制于本发明。对本领域技术人员来说,在不脱离本发明原理的前提下作出的若干改进和变型,也应视为本发明的保护范围。

Claims (5)

1.一种注塑高光产品无保压成型工艺,其特征在于,包括以下步骤:
S1、选料:选取PMMA作为注射树脂材料;
S2、烘干:将上述注塑树脂材料进行烘干抽湿处理;
S3、模具预热:对模具进行预热处理,预热运水设为90~95℃,预热时间为30~35分钟;
S4、材料预热:将注射树脂材料加热至熔融温度;
S5、合模:模具预热达到90~95℃后进行合模;
S6、注塑:向模具中注入熔融状态的注射树脂材料,注塑参数设置如下:射胶压力,200MPa;射胶速度,第一段35mm/s,第二段15mm/s,第三段10mm/s,第四段10mm/s,第五段10mm/s;射胶位置:第一段100mm,第二段30mm,第三段27mm,第四段27mm,第五段27mm;射胶时间,8s;熔胶压力120MPa;熔胶速度,75mm/s;熔胶位置,150mm;背压10MPa;保压压力,0MPa;保压时间,0s。
S7、冷却:向模具中通入90℃的运水,使模具温度保持在90℃,冷却时间为55~65s;
S8、开模:模具将成品顶出,取出成品。
2.根据权利要求1所述的无保压成型工艺,其特征在于:所述步骤S2中的烘干温度为80℃,预热时间为3小时。
3.根据权利要求1所述的无保压成型工艺,其特征在于:所述步骤S4中温度为220-260℃。
4.根据权利要求1或3所述的无保压才成型工艺,其特征在于:所述材料预热为分段式加热,料筒第一段加热至245℃,料筒第二段加热至245℃,料筒第三段加热至245℃,料筒第四段加热至230℃,料筒第五段加热至230℃。
5.根据权利要求1所述的无保压成型工艺,其特征在于:所述步骤S7的冷却时间为60s。
CN201711020723.8A 2017-10-26 2017-10-26 一种注塑高光产品无保压成型工艺 Pending CN107803967A (zh)

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CN108748937A (zh) * 2018-06-28 2018-11-06 昆山弘正电子科技有限公司 路由器外壳的注塑成型工艺
CN108890954A (zh) * 2018-06-28 2018-11-27 昆山弘正电子科技有限公司 路由器插片的注塑成型工艺
CN110524822A (zh) * 2019-09-03 2019-12-03 江苏荣腾精密组件科技股份有限公司 高效注塑工艺
CN111634034A (zh) * 2020-05-12 2020-09-08 合肥通泰光电科技有限公司 一种导光板压缩模工艺
CN114454421A (zh) * 2021-12-22 2022-05-10 厦门易智教育科技有限公司 一种带包胶积木块的注塑生产工艺
CN114721170A (zh) * 2022-04-19 2022-07-08 温州市三普光学科技有限公司 一种结构色太阳镜镜片及其成型工艺
CN115157538A (zh) * 2022-05-24 2022-10-11 遵义群建塑胶制品有限公司 一种聚醚醚酮制备连接器盖的加工工艺

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108748937A (zh) * 2018-06-28 2018-11-06 昆山弘正电子科技有限公司 路由器外壳的注塑成型工艺
CN108890954A (zh) * 2018-06-28 2018-11-27 昆山弘正电子科技有限公司 路由器插片的注塑成型工艺
CN110524822A (zh) * 2019-09-03 2019-12-03 江苏荣腾精密组件科技股份有限公司 高效注塑工艺
CN111634034A (zh) * 2020-05-12 2020-09-08 合肥通泰光电科技有限公司 一种导光板压缩模工艺
CN114454421A (zh) * 2021-12-22 2022-05-10 厦门易智教育科技有限公司 一种带包胶积木块的注塑生产工艺
CN114454421B (zh) * 2021-12-22 2023-10-03 厦门易智教育科技有限公司 一种带包胶积木块的注塑生产工艺
CN114721170A (zh) * 2022-04-19 2022-07-08 温州市三普光学科技有限公司 一种结构色太阳镜镜片及其成型工艺
CN114721170B (zh) * 2022-04-19 2024-03-19 温州市三普光学科技有限公司 一种结构色太阳镜镜片及其成型工艺
CN115157538A (zh) * 2022-05-24 2022-10-11 遵义群建塑胶制品有限公司 一种聚醚醚酮制备连接器盖的加工工艺

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