WO2024032024A1 - Moule de produit de moulage par injection, procédé de traitement de moule de produit de moulage par injection et produit moulé par injection - Google Patents

Moule de produit de moulage par injection, procédé de traitement de moule de produit de moulage par injection et produit moulé par injection Download PDF

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Publication number
WO2024032024A1
WO2024032024A1 PCT/CN2023/089800 CN2023089800W WO2024032024A1 WO 2024032024 A1 WO2024032024 A1 WO 2024032024A1 CN 2023089800 W CN2023089800 W CN 2023089800W WO 2024032024 A1 WO2024032024 A1 WO 2024032024A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
overflow
injection
injection molding
product
Prior art date
Application number
PCT/CN2023/089800
Other languages
English (en)
Chinese (zh)
Inventor
王月
郭蜻蜻
陈运东
Original Assignee
青岛海尔空调器有限总公司
青岛海尔空调电子有限公司
海尔智家股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔空调器有限总公司, 青岛海尔空调电子有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔空调器有限总公司
Publication of WO2024032024A1 publication Critical patent/WO2024032024A1/fr

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Classifications

    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • B29C45/26—Moulds
    • B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0034—Mould parting lines

Definitions

  • the invention relates to the technical field of decorative parts processing, and in particular to an injection product mold.
  • the invention also relates to a mold processing method for injection molded products.
  • the invention also relates to a decorative strip.
  • the weld line also known as the welding line or the pinch line, refers to a defect caused by the failure of two material flows to fully merge when they meet during the filling process of the melt.
  • the flow front proceeds via fountain flow, in which polymer molecular chains are pulled from the thickness-wise core and tumble to the cavity surface.
  • fountain flow in which polymer molecular chains are pulled from the thickness-wise core and tumble to the cavity surface.
  • Welding lines are often produced during the injection molding process. Welding lines are one of the most serious molding defects of injection molded products. It not only affects the appearance quality of the product, but also has an impact on the strength of the product, and after post-processing such as painting, In the future, the welding line will be difficult to handle, resulting in reduced processing quality of injection molded products.
  • the purpose of the present invention is to provide an injection molding product mold to improve the processing quality of injection molding products. Another object of the present invention is to provide a mold processing method for injection molded products. Another object of the present invention is to provide a decorative strip.
  • the present invention provides an injection molding product mold.
  • the injection molding product mold is provided with a glue inlet, a mold cavity and an overflow groove.
  • the glue inlet is connected with the mold cavity, and the overflow groove is provided with The position of the welding line after molding of the corresponding decorative strip is on the side wall of the cavity.
  • the overflow groove is a rectangular groove.
  • the overflow chute includes a material containing chute and an intermediate channel with both ends connected to the material containing chute and the mold cavity respectively.
  • the length of the middle channel is smaller than the length of the material containing tank.
  • the thickness of the overflow groove is 0.6mm-0.8mm, and the thickness direction of the overflow groove is the mold opening direction perpendicular to the parting surface;
  • the length of the overflow trough is 10mm-15mm, and the length of the overflow trough is the distance between the outermost side of the overflow trough and the mold cavity;
  • the width of the overflow trough can be designed to be 5mm-8mm, and the width direction of the overflow trough is arranged perpendicularly to the length direction of the overflow trough.
  • the cavity is an annular structure.
  • two overflow grooves are provided at the position of the welding line after the molding of the same product, and the two overflow grooves are distributed on opposite sides of the mold cavity.
  • An injection molding product mold processing method includes the steps:
  • the overflow groove, the cavity and the glue inlet are directly formed on the mold.
  • An injection molding product mold processing method includes the steps:
  • an overflow groove is processed on the injection mold to form the injection mold according to any one of the above.
  • An injection molded product is obtained by processing the above injection molded product mold.
  • the invention provides an injection molding product mold.
  • the injection molding product mold is provided with a glue inlet, a cavity and an overflow groove.
  • the glue inlet is connected with the mold cavity, and the overflow groove is provided on the side wall of the mold cavity corresponding to the decoration. The position of the weld line after strip forming.
  • Figure 1 shows the pressure display of the welding line position after the traditional trim strip processing is completed
  • Figure 2 shows the intersection angle of the weld line after the traditional trim strip processing is completed
  • Figure 3 shows the position density of the welding lines after the traditional trim strips are processed
  • Figure 4 is a diagram showing the position pressure of the welding line after the decorative strip is processed according to the embodiment of the present invention.
  • Figure 5 is a view showing the convergence angle of the weld line after the decorative strip is processed according to the embodiment of the present invention
  • Figure 6 is a diagram showing the position density of welding lines after processing of the decorative strip provided by the embodiment of the present invention.
  • Figure 7 is a schematic structural diagram of an injection mold product provided by an embodiment of the present invention.
  • Figure 8 is a schematic structural diagram of another injection molding product mold provided by an embodiment of the present invention.
  • Figure 9 is a schematic structural diagram of an injection molding product mold processed with a decorative strip structure provided by an embodiment of the present invention.
  • Figure 10 is a schematic structural diagram of a decorative strip provided by an embodiment of the present invention.
  • the core of the present invention is to provide an injection molding product mold to improve the processing quality of injection molding products. Another core of the present invention is to provide a mold processing method for injection molded products. Another core of the present invention is to provide a decorative strip.
  • the injection molding product mold provided by the specific embodiment of the present invention, the injection molding product mold 1 is provided with a glue inlet 2, a mold cavity 3 and an overflow groove 4.
  • the glue inlet 2 is connected with the mold cavity 3, and the overflow groove 4 is connected with the mold cavity 3.
  • the material trough 4 is opened on the side wall of the mold cavity 3 to correspond to the position of the welding line after the product 6 is formed.
  • the overflow chute 4 may be a rectangular chute. Specifically, the thickness of the overflow chute 4 is preferably consistent. The overflow chute 4 may also have an arc-shaped chute structure.
  • the overflow chute 4 includes a material containing chute and an intermediate channel whose two ends are connected to the material containing chute and the mold cavity 3 respectively. , the length of the middle channel is smaller than the length of the material trough. This arrangement facilitates the removal of the flash piece 5 on the product 6 after molding. At the same time, the impact of the overflow piece 5 on the product 6 is reduced.
  • each welding line position is provided with an overflow chute 4.
  • each welding line position is provided with an overflow chute 4.
  • the thickness of the overflow chute 4 is 0.6mm-0.8mm. Specifically, the thickness of the overflow chute 4 can be 0.7mm.
  • the thickness direction of the overflow chute 4 is perpendicular to the mold opening of the parting surface. direction.
  • an overflow groove 4 is designed at the parting surface of the product to form an overflow piece, which is usually a simple plastic piece.
  • the length of the overflow groove 4 can be designed to be 10mm-15mm according to the size of the injection mold 1. Specifically, the length of the overflow groove 4 is the distance between the outermost side of the overflow groove 4 and the mold cavity 3.
  • the width of the overflow chute 4 can be designed to be 5mm-8mm. Specifically, the width direction of the overflow chute 4 is perpendicular to the length direction of the overflow chute 4 .
  • the product 6 can have a strip structure, and there can be two glue inlets 2 , and an overflow chute 4 is provided at the welding line between the two glue inlets 2 .
  • the mold cavity 3 may have an annular structure, and in this case there may be one or at least two glue inlets 2.
  • the overflow groove 4 is an annular groove body arranged around the position of the welding line in the mold cavity 3 .
  • two overflow troughs 4 are provided at the welding line position of the same product 6 after molding, and the two overflow troughs 4 are distributed on opposite sides of the mold cavity 3 .
  • the orientation of the polymer chain and filler is parallel to the wall surface, which improves the fusion of the melt front and reduces the depth of the V-shaped structure groove.
  • This application starts from the perspective of improving the air trapped in the mold and the cold material at the front end.
  • an overflow tank 4 on the injection mold 1, the gas and cold material are introduced into the overflow tank 4 to avoid appearing on the product.
  • an overflow chute 4 is provided to form an overflow piece 5 so that the melt density at the welding line of the product 6 is increased.
  • the melt density at the weld line position of product 6 of the present application increases.
  • the overflow piece 5 can be removed or not removed, which is determined according to the actual distribution and use conditions.
  • the fountain flow behavior at the confluence position of the melt polymer chain has also been improved, changing the distribution trend and location of the cold solidified layer and the molten layer, and the V-shaped structure of the cold solidified layer on the surface of the product has been Optimize or even eliminate, thereby greatly improving its welding strength.
  • This application provides an injection molding product mold processing method, including the steps:
  • the overflow groove 4, the cavity 3 and the glue inlet 2 are directly formed on the mold.
  • This application adopts the method of simulation analysis to determine the position of the main glue inlet and the position of the welding line in the glue inlet 2 in the early stage of product design, when the mold is not being developed, and determine the position of the welding line in advance. Design the overflow structure at the product parting position; advance the gate design of the mold to the early stage of product design and development, so as to avoid possible subsequent defects from the perspective of product design and improve the processing efficiency of injection molding product molds.
  • This application provides an injection molding product mold processing method, including the steps:
  • the overflow groove 4 is processed on the injection molding product mold 1 to form the above-mentioned injection molding product mold 1.
  • the optimal position of the main plastic inlet 2 and the location of the welding line are determined. Since the material thickness and material have been determined after the product design is completed, it can be realized whether the position of the main glue inlet 2 is determined based on the position of the welding line or the position of the welding line is determined by the position of the glue inlet 2.
  • This application provides an injection molded product, in which product 6 is processed using the above injection molded product mold 1.
  • the product can be arranged in linear or circular configurations for decorative strips.

Landscapes

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

Abstract

La présente invention concerne un moule de produit de moulage par injection (1), un procédé de traitement de moule de produit de moulage par injection et un produit moulé par injection (6), le moule de produit de moulage par injection (1) étant pourvu d'une entrée de colle (2), d'une cavité de moule (3) et d'une fente de trop-plein (4), l'entrée de colle (2) communiquant avec la cavité de moule (3), et la fente de trop-plein (4) étant disposée sur une paroi latérale de la cavité de moule (3) et correspondant à la position d'une ligne de soudure après moulage de bande de garniture. Lors du moulage par injection, un matériau fondu converge généralement au niveau de la ligne de soudure. Après l'ajout de la fente de trop-plein (4), au niveau de la position de convergence, la vitesse d'écoulement d'un front de matériau dans une direction verticale est supérieure à sa vitesse dans une direction parallèle, la différence de vitesse entre les deux directions fait augmenter un angle de convergence, ce qui permet d'améliorer la ligne de soudure.
PCT/CN2023/089800 2022-08-09 2023-04-21 Moule de produit de moulage par injection, procédé de traitement de moule de produit de moulage par injection et produit moulé par injection WO2024032024A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210958612.6 2022-08-09
CN202210958612.6A CN115366320A (zh) 2022-08-09 2022-08-09 注塑产品模具、注塑产品模具加工方法及注塑产品

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Publication Number Publication Date
WO2024032024A1 true WO2024032024A1 (fr) 2024-02-15

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CN (1) CN115366320A (fr)
WO (1) WO2024032024A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115366320A (zh) * 2022-08-09 2022-11-22 青岛海尔空调器有限总公司 注塑产品模具、注塑产品模具加工方法及注塑产品

Citations (13)

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JP2010201666A (ja) * 2009-03-02 2010-09-16 Gifu Tada Seiki:Kk 射出成形金型及び射出成形方法
JP2012223989A (ja) * 2011-04-20 2012-11-15 Isuzu Motors Ltd 射出成形方法及びこれに用いる射出成形用金型
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US20170291336A1 (en) * 2014-11-25 2017-10-12 Kasai Kogyo Co., Ltd. Synthetic resin molding and molding method therefor
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CN109795078A (zh) * 2018-12-30 2019-05-24 瑞声精密制造科技(常州)有限公司 一种带有溢料井的注塑模具及其使用方法
CN210552680U (zh) * 2019-05-24 2020-05-19 艾曼斯（苏州）工程塑料有限公司 一种用于纤维增强复合材料的注塑模具
CN113459421A (zh) * 2021-05-17 2021-10-01 宁波敏纳模具科技有限公司 一种用新型模具成型薄壁产品的方法
CN115366320A (zh) * 2022-08-09 2022-11-22 青岛海尔空调器有限总公司 注塑产品模具、注塑产品模具加工方法及注塑产品

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060237874A1 (en) * 2003-01-21 2006-10-26 Techno Polymer Co., Ltd. Injection molding die, injection molding method, and weldless molded product
JP2010201666A (ja) * 2009-03-02 2010-09-16 Gifu Tada Seiki:Kk 射出成形金型及び射出成形方法
JP2012223989A (ja) * 2011-04-20 2012-11-15 Isuzu Motors Ltd 射出成形方法及びこれに用いる射出成形用金型
CN103029261A (zh) * 2012-12-13 2013-04-10 瑞声声学科技(深圳)有限公司 塑料构件加工构造及加工方法
CN203580019U (zh) * 2013-12-04 2014-05-07 大连普阳铁路机车车辆配件有限公司 工程塑料保持架开放式型腔精密模具
CN204622460U (zh) * 2014-01-04 2015-09-09 上海朗亿功能材料有限公司 一种制备塑料金属制件的注塑模具
US20170291336A1 (en) * 2014-11-25 2017-10-12 Kasai Kogyo Co., Ltd. Synthetic resin molding and molding method therefor
CN106863692A (zh) * 2017-04-01 2017-06-20 上海小糸车灯有限公司 一种汽车车灯用注塑件的注塑方法
CN207915934U (zh) * 2018-01-25 2018-09-28 瑞声光电科技(常州)有限公司 注塑模具
CN109795078A (zh) * 2018-12-30 2019-05-24 瑞声精密制造科技(常州)有限公司 一种带有溢料井的注塑模具及其使用方法
CN210552680U (zh) * 2019-05-24 2020-05-19 艾曼斯（苏州）工程塑料有限公司 一种用于纤维增强复合材料的注塑模具
CN113459421A (zh) * 2021-05-17 2021-10-01 宁波敏纳模具科技有限公司 一种用新型模具成型薄壁产品的方法
CN115366320A (zh) * 2022-08-09 2022-11-22 青岛海尔空调器有限总公司 注塑产品模具、注塑产品模具加工方法及注塑产品

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