WO2023029556A1 - 一种环形浇口模具 - Google Patents

一种环形浇口模具 Download PDF

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Publication number
WO2023029556A1
WO2023029556A1 PCT/CN2022/091737 CN2022091737W WO2023029556A1 WO 2023029556 A1 WO2023029556 A1 WO 2023029556A1 CN 2022091737 W CN2022091737 W CN 2022091737W WO 2023029556 A1 WO2023029556 A1 WO 2023029556A1
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WIPO (PCT)
Prior art keywords
cutter
annular
mold core
pressure
tapered groove
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PCT/CN2022/091737
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English (en)
French (fr)
Inventor
候朝晖
房小建
王星
庞积颖
黄锐
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
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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 WO2023029556A1 publication Critical patent/WO2023029556A1/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
    • B29C45/38—Cutting-off equipment for sprues or ingates
    • B29C45/382—Cutting-off equipment for sprues or ingates disposed outside 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
    • B29C45/17—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

Definitions

  • the invention relates to the technical field of injection molding, in particular to an annular sprue mold.
  • Injection molding also known as injection molding, is a molding method of injection and molding.
  • the advantages of the injection molding method are fast production speed, high efficiency, automatic operation, various designs and colors, simple to complex shapes, large to small sizes, accurate product sizes, easy replacement of products, and complex shapes. Parts, injection molding is suitable for mass production and complex shape products and other molding processing fields.
  • injection molding will inevitably use molds, but for molds with ring gates, after the product is released from the mold, the handle and the product will be connected together, requiring manual trimming, which is not only time-consuming and laborious, but also high production costs.
  • the object of the present invention is to provide a ring gate mold to solve the problem that the ring gate mold needs to manually trim the material after the product is out of the mold, resulting in high production costs.
  • the present invention provides an annular sprue mold, comprising a front mold core, a rear mold core and a cutter assembly, a sprue is formed on the front mold core, and the rear mold core is facing the sprue
  • the position of the cutter is formed with a tapered groove.
  • the cutter assembly includes a cutter sleeve and a pressure mechanism. The cutter sleeve is slidably sleeved on the outside of the nozzle.
  • the bottom end of the cutter sleeve is formed with an annular blade, the annular blade is opposite to the outer edge of the tapered groove,
  • the pressing mechanism is arranged on the top of the cutter sleeve and is used for applying pressure to the cutter sleeve so that the annular blade abuts against the outer edge of the tapered groove.
  • the pressing mechanism includes a fixing plate fixedly connected to the top of the cutter sleeve and a pressing cover fixed on the top surface of the fixing plate, and a vertically arranged A spring installation through groove, a return spring is arranged in the spring installation through groove, one end of the return spring is fixedly connected with the pressure applying cover, and the other end of the return spring is against the top surface of the front mold core , and the return spring has an elastic force to maintain a preset movement gap between the bottom surface of the fixed plate and the top surface of the front mold core.
  • the thickness of the gate formed after the front mold core and the rear mold core are closed is 0.5 mm, and the preset movement gap is not less than 0.5 mm.
  • the pressure applying mechanism further includes a driving mechanism arranged on the top of the pressure applying cover plate, the driving mechanism is used to drive the pressure applying cover plate to move downward so that the annular blade and the cone The outer edge of the shaped groove is offset.
  • the drive mechanism is a linear telescopic rod mechanism.
  • linear telescopic rod mechanisms which are symmetrically distributed on both sides of the nozzle.
  • the linear telescopic rod mechanism is a telescopic oil cylinder, and the oil pressure pipelines of the two telescopic oil cylinders are connected and communicated with the oil pressure control system through a main pipeline.
  • vertically arranged guide posts are provided on the top of the front mold core, and guide holes matching the guide posts are provided on the fixing plate.
  • the fixing plate is fixedly connected to the pressure applying cover plate by bolts.
  • the annular blade is formed by chamfering the bottom end of the cutter sleeve, and the cutting angle of the annular blade is 30°, and the cutting width of the annular blade is 0.05mm.
  • the above-mentioned annular gate mold includes the front mold core, the rear mold core and the cutter assembly.
  • the cutter assembly includes a cutter sleeve and a pressure mechanism.
  • the cutter sleeve is slidably set on the outside of the nozzle.
  • the nozzle is used to connect with the injection molding machine and can penetrate the sprue and extend directly above the tapered groove.
  • the bottom end of the cutter sleeve is formed with an annular blade, and the annular blade is opposite to the outer edge of the tapered groove. The blade is against the outer edge of the tapered groove.
  • the injection molding machine injects the injection material into the cavity formed by the front mold core and the rear mold core after the mold is closed to complete the injection molding, and then presses the pressure mechanism to the cutter sleeve. Apply pressure so that the annular blade at the bottom of the cutter sleeve touches the outer edge of the tapered groove on the rear mold core, so that the material handle connected to the product is cut off, and it can be completed directly through the pressure-applying mechanism, eliminating the need for The step of manual trimming after demoulding improves production efficiency and saves labor costs at the same time.
  • Fig. 1 is the exploded structure schematic diagram of the annular sprue mold provided by the present invention
  • Fig. 2 is the structural representation of the top view of the annular gate mold provided by the present invention.
  • Fig. 3 is a schematic diagram of the cross-sectional structure of A-A of Fig. 2;
  • Fig. 4 is a partially enlarged schematic diagram of part B of Fig. 3;
  • Fig. 5 is a partially enlarged schematic diagram of part C of Fig. 3;
  • Fig. 6 is a top view structural schematic diagram of the cutter sleeve provided by the present invention.
  • Fig. 7 is a schematic diagram of the D-D sectional structure of Fig. 6;
  • Fig. 8 is a schematic diagram of a partial structure of part E of Fig. 7;
  • Fig. 9 is a schematic diagram of the separation of the handle and the product provided by the present invention.
  • the core of the present invention is to provide an annular gate mold to solve the problem of high production cost caused by the manual trimming of material handles after the product is released from the annular gate mold.
  • the embodiment of the present invention provides a ring-shaped sprue mold, including a front mold core 1, a rear mold core 2 and a cutter assembly 3, a sprue is formed on the front mold core 1, and a rear mold core A tapered groove 21 is formed at the position of the core 2 facing the sprue.
  • the cutter assembly 3 includes a cutter sleeve 31 and a pressure mechanism 32.
  • the cutter sleeve 31 is slidably set on the outside of the nozzle 4, and the nozzle 4 is used to Connected with the injection molding machine and able to penetrate the sprue and extend directly above the tapered groove 21 , the bottom end of the cutter sleeve 31 is formed with an annular blade 310 , and the annular blade 310 is aligned with the outer edge of the tapered groove 21 Yes, the pressing mechanism 32 is disposed on the top of the cutter sleeve 31 and is used to apply pressure to the cutter sleeve 31 so that the annular blade 310 abuts against the outer edge of the tapered groove 21 .
  • the injection molding machine injects the injection material into the cavity formed by the front mold core 1 and the rear mold core 2 after mold closing through the nozzle 4 to complete the injection molding, and then through the pressure applying mechanism 32 to
  • the cutter sleeve 31 exerts pressure so that the annular blade 310 at the bottom end of the cutter sleeve 31 is against the outer edge of the tapered groove 21 on the rear mold core 2, thereby cutting off the material handle 8 connected to the product 7 and passing through directly
  • the operation of the pressing mechanism 32 can be completed, which saves the step of manual trimming after demoulding, improves production efficiency, and saves labor costs at the same time.
  • the above-mentioned pressing mechanism 32 may specifically include a fixing plate 32a fixedly connected to the top of the cutter sleeve 31 and a pressure applying cover plate 32b fixed on the top surface of the fixing plate 32a.
  • a vertically arranged spring installation through groove 32a1 is formed, and a return spring 32c is arranged in the spring installation through groove 32a1.
  • One end of the return spring 32c is fixedly connected with the pressing cover plate 32b, and the other end of the return spring 32c is connected with the front mold core 1.
  • the top surfaces are against each other, and the return spring 32c has an elastic force to keep the bottom surface of the fixed plate 32a and the top surface of the front mold core 1 with a predetermined movement gap.
  • the pressing mechanism 32 By designing the pressing mechanism 32 into the above-mentioned structural form, the pressing mechanism 32 can be automatically reset by the return spring 32c, so as to facilitate the repetition of actions. Simultaneously, by adopting the combined form of the pressing cover plate 32b and the fixing plate 32a, the disassembly and assembly of the return spring 32c is more convenient, wherein the fixing method of the fixing plate 32a and the pressing cover plate 32b can adopt the fixed connection mode of the bolt 32e, also can Other fixing methods commonly used by those skilled in the art are adopted, and no more specific limitations are made here.
  • the thickness of the gate formed after the front mold core 1 and the rear mold core 2 are closed is preferably 0.5mm.
  • the pressure applying mechanism 32 can successfully complete the pressure application and drive the cutter sleeve to complete the cutting action.
  • Corresponding to the aforementioned preset movement gap h should not be less than 0.5mm.
  • the above-mentioned pressing mechanism 32 may also include a driving mechanism 32d arranged on the top of the pressing cover plate 32b, and the driving mechanism 32d is used to drive the pressing cover plate 32b to move downward to make the annular blade 310 It abuts against the outer edge of the tapered groove 21 .
  • the driving mechanism 32d is used to drive the pressing cover plate 32b to move downward to make the annular blade 310 It abuts against the outer edge of the tapered groove 21 .
  • the driving mechanism 32d can specifically be a linear telescopic rod mechanism, such as an electronically controlled telescopic rod, a cylinder telescopic rod or an oil cylinder telescopic rod, etc., which can be selected according to actual needs during practical application.
  • a linear telescopic rod mechanism such as an electronically controlled telescopic rod, a cylinder telescopic rod or an oil cylinder telescopic rod, etc., which can be selected according to actual needs during practical application.
  • the number of the above-mentioned linear telescopic rod mechanisms is generally preferably two, and they are symmetrically distributed on both sides of the nozzle 4 .
  • the downward pushing force of the driving mechanism to the pressing cover plate is more stable.
  • the linear telescopic rod mechanism adopts telescopic oil cylinders, that is, two telescopic oil cylinders are used to drive the pressing cover plate, and the oil pressure pipelines 5 of the two telescopic oil cylinders are generally designed to be connected to each other.
  • a main pipeline communicates with the oil pressure control system 6 .
  • the oil pressure pipelines designed to communicate with each other and communicate with the oil pressure control system 6 through a main pipeline can make the driving force of the two telescopic oil cylinders consistent and the actions executed synchronously.
  • the top of the front mold core 1 may also be provided with a vertically arranged guide column 11
  • the fixing plate 32a is provided with a guide hole 32a2 adapted to the guide column 11 .
  • the pressure-applying cover plate drives the fixed plate to move downward more smoothly, avoiding the occurrence of jamming.
  • a guide sleeve 32a3 may also be provided in the guide hole 32a2, and the guide post and the guide sleeve 32a3 are slidably matched.
  • the specific structural form of the above-mentioned annular blade 310 can be formed by chamfering the bottom end of the cutter sleeve 31.
  • the cutter angle of the annular blade 310 a is preferably 30°
  • the cutter width w of the annular blade 310 is preferably 0.05 mm.
  • the parameter design of the ring blade can ensure the service life of the ring blade is more than 100,000 times, and at the same time, it can keep the residual material as small as possible. For details, please refer to Table 2:

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

Abstract

本发明公开了一种环形浇口模具，包括前模仁、后模仁和切刀组件，前模仁上形成有浇注口，后模仁正对浇注口的位置形成有锥形槽，切刀组件包括切刀套筒和施压机构，切刀套筒滑动套设于唧咀的外侧，唧咀用于与注塑机连接且能够穿入浇注口并伸入至锥形槽的正上方，切刀套筒的底端形成有环形刀刃，环形刀刃与锥形槽的外边沿相正对，施压机构设置于切刀套筒的顶部且用于向切刀套筒施压以使环形刀刃与锥形槽的外边沿相抵。该环形浇口模具，直接通过施压机构操作即可完成，省去了脱模后人工修剪的步骤，提高了生产效率，同时节约了人力成本。

Description

一种环形浇口模具
本申请基于申请号为202111002026.6、申请日为2021年8月30日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及注塑成型技术领域，尤其涉及一种环形浇口模具。
背景技术
注塑成型又称注射模塑成型，它是一种注射兼模塑的成型方法。注塑成型方法的优点是生产速度快、效率高，操作可实现自动化，花色品种多，形状可以由简到繁，尺寸可以由大到小，而且制品尺寸精确，产品易更新换代，能成形状复杂的制件，注塑成型适用于大量生产与形状复杂产品等成型加工领域。
一般来说，注塑成型必然会用到模具，而针对于环形浇口的模具，产品出模后料把与产品会连在一起，需要人工进行修剪，不仅费时费力，而且生产成本高。
综上所述，如何解决环形浇口模具在产品出模后需人工修剪料把导致生产成本高的问题已经成为本领域技术人员亟需解决的技术难题。
发明内容
本发明的目的是提供一种环形浇口模具，以解决环形浇口模具在产品出模后需人工修剪料把导致生产成本高的问题。
为了实现上述目的，本发明提供了一种环形浇口模具，包括前模仁、后模仁和切刀组件，所述前模仁上形成有浇注口，所述后模仁正对所述浇注口的位置形成有锥形槽，所述切刀组件包括切刀套筒和施压机构，所述切刀套筒滑动套设于唧咀的外侧，所述唧咀用于与注塑机连接且能够穿入所述浇注口并伸入至所述锥形槽的正上方，所述切刀套筒的底端形成有环形刀刃，所述环形刀刃与所述锥形槽的外边沿相正对，所述施压机构设置于所述切刀套筒的顶部且用于向所述切刀套筒施压以使所述环形刀刃与所述锥形槽的外边沿相抵。
优选地，所述施压机构包括与所述切刀套筒的顶部固定连接的固定板和固定于所 述固定板的顶面的施压盖板，所述固定板上形成有竖向布置的弹簧安装通槽，所述弹簧安装通槽内设置有复位弹簧，所述复位弹簧的一端与所述施压盖板固定连接，所述复位弹簧的另一端与所述前模仁的顶面相抵，且所述复位弹簧具有使所述固定板的底面与所述前模仁的顶面保持预设运动间隙的弹性力。
优选地，所述前模仁与所述后模仁合模后所形成的浇口厚度为0.5mm，所述预设运动间隙不低于0.5mm。
优选地，所述施压机构还包括设置于所述施压盖板的顶部的驱动机构，所述驱动机构用于驱动所述施压盖板向下运动以使所述环形刀刃与所述锥形槽的外边沿相抵。
优选地，所述驱动机构为直线伸缩杆机构。
优选地，所述直线伸缩杆机构的数量为两个，且对称分布于所述唧咀的两侧。
优选地，所述直线伸缩杆机构为伸缩油缸，且两个所述伸缩油缸的油压管路相连通并通过一条总管路与油压控制系统连通。
优选地，所述前模仁的顶部设置有竖向布置的导向柱，所述固定板上设置有与所述导向柱相适配的导向孔。
优选地，所述固定板与所述施压盖板通过螺栓固定连接。
优选地，所述环形刀刃为所述切刀套筒的底端内倒角形成，且环形刀刃的切刀角度为30°，所述环形刀刃的切刀宽度为0.05mm。
相比于背景技术介绍内容，上述环形浇口模具，包括前模仁、后模仁和切刀组件，前模仁上形成有浇注口，后模仁正对浇注口的位置形成有锥形槽，切刀组件包括切刀套筒和施压机构，切刀套筒滑动套设于唧咀的外侧，唧咀用于与注塑机连接且能够穿入浇注口并伸入至锥形槽的正上方，切刀套筒的底端形成有环形刀刃，环形刀刃与锥形槽的外边沿相正对，施压机构设置于切刀套筒的顶部且用于向切刀套筒施压以使环形刀刃与锥形槽的外边沿相抵。该环形浇口模具，在实际使用过程中，注塑机通过唧咀将注塑料注入至合模后的前模仁与后模仁形成的型腔完成注塑，然后通过施压机构向切刀套筒施加压力以使切刀套筒的底端的环形刀刃与后模仁上的锥形槽的外边沿相抵，从而将产品所连接的料把切除，直接通过施压机构操作即可完成，省去了脱模后人工修剪的步骤，提高了生产效率，同时节约了人力成本。
附图说明
图1为本发明提供的环形浇口模具的爆炸结构示意图；
图2为本发明提供的环形浇口模具的俯视的结构示意图；
图3为图2的A-A剖视结构示意图；
图4为图3的B部局部放大示意图；
图5为图3的C部局部放大示意图；
图6为本发明提供的切刀套筒的俯视结构示意图；
图7为图6的D-D剖视结构示意图；
图8为图7的E部局部结构示意图；
图9为本发明提供的料把与产品分离的结构示意图。
图中：
前模仁1、导向柱11、后模仁2、锥形槽21、切刀组件3、切刀套筒31、环形刀刃310、施压机构32、固定板32a、弹簧安装通槽32a1、导向孔32a2、导向套32a3、施压盖板32b、复位弹簧32c、驱动机构32d、螺栓32e、唧咀4、油压管路5、油压控制系统6、产品7、料把8。
具体实施方式
本发明的核心是提供一种环形浇口模具，以解决环形浇口模具在产品出模后需人工修剪料把导致生产成本高的问题。
为了使本领域的技术人员更好地理解本发明提供的技术方案，下面将结合附图和具体实施例对本发明作进一步的详细说明。
如图1-图9所示，本发明实施例提供了一种环形浇口模具，包括前模仁1、后模仁2和切刀组件3，前模仁1上形成有浇注口，后模仁2正对浇注口的位置形成有锥形槽21，切刀组件3包括切刀套筒31和施压机构32，切刀套筒31滑动套设于唧咀4的外侧，唧咀4用于与注塑机连接且能够穿入浇注口并伸入至锥形槽21的正上方，切刀套筒31的底端形成有环形刀刃310，环形刀刃310与锥形槽21的外边沿相正对，施压机构32设置于切刀套筒31的顶部且用于向切刀套筒31施压以使环形刀刃310与锥形槽21的外边沿相抵。
该环形浇口模具，在实际使用过程中，注塑机通过唧咀4将注塑料注入至合模后的前模仁1与后模仁2形成的型腔完成注塑，然后通过施压机构32向切刀套筒31施加压力以使切刀套筒31的底端的环形刀刃310与后模仁2上的锥形槽21的外边沿相抵，从而将产品7所连接的料把8切除，直接通过施压机构32操作即可完成，省去了脱模 后人工修剪的步骤，提高了生产效率，同时节约了人力成本。
在一些具体的实施方案中，上述施压机构32具体可以包括与切刀套筒31的顶部固定连接的固定板32a和固定于固定板32a的顶面的施压盖板32b，固定板32a上形成有竖向布置的弹簧安装通槽32a1，弹簧安装通槽32a1内设置有复位弹簧32c，复位弹簧32c的一端与施压盖板32b固定连接，复位弹簧32c的另一端与前模仁1的顶面相抵，且复位弹簧32c具有使固定板32a的底面与前模仁1的顶面保持预设运动间隙的弹性力。通过将施压机构32设计成上述结构形式，使得施压机构32能够通过复位弹簧32c自动复位，以方便动作的重复。同时通过采用施压盖板32b与固定板32a的结合形式，使得复位弹簧32c的拆装更加方便，其中固定板32a与施压盖板32b的固定方式可以采用螺栓32e固定连接的方式，也可以采用本领域技术人员常用的其他固定方式，在此不做更具体的限定。
进一步的实施方案中，前模仁1与后模仁2合模后所形成的浇口厚度优选为0.5mm，当然为了保证施压机构32能够顺利完成施压带动切刀套筒完成切断动作，对应前述预设运动间隙h应不低于0.5mm。通过大量试验测试发现，浇口厚度设计成0.5mm能够保证产品不缺料的前提下，使得切断后残料最少，具体可以参见表1：
表1
Figure PCTCN2022091737-appb-000001
在一些更具体的实施方案中，上述施压机构32还可以包括设置于施压盖板32b的顶部的驱动机构32d，驱动机构32d用于驱动施压盖板32b向下运动以使环形刀刃310与锥形槽21的外边沿相抵。通过设计驱动机构可以使得设备自身完成切断料把的动作，无需人工操作，大大提升了环形浇口模具的自动化程度，节省了人力成本。
需要说明的是，该驱动机构32d具体可以为直线伸缩杆机构，比如电控伸缩杆，气缸伸缩杆或油缸伸缩杆等，实际应用过程中，可以根据实际需求进行选择。
进一步的实施方案中，上述直线伸缩杆机构的数量一般优选为两个，且对称分布于唧咀4的两侧。通过设计成两个直线伸缩杆机构，并且对称分布于唧咀4的两侧，使得驱动机构对施压盖板的向下推动力更加平稳。
需要说明的是，当直线伸缩杆机构采用伸缩油缸时，也即采用两个伸缩油缸对施压盖板进行驱动，两个伸缩油缸的油压管路5一般设计成相互连通的结构，并且通过一 条总管路与油压控制系统6连通。通过设计成相互连通的油压管路并通过一个总管路与油压控制系统6连通，可以使得两个伸缩油缸的驱动力一致且动作执行同步。
在一些更具体的实施方案中，上述前模仁1的顶部还可以设置有竖向布置的导向柱11，固定板32a上设置有与导向柱11相适配的导向孔32a2。通过设计导向柱与导向孔的导向结构，使得施压盖板带动固定板向下运动更加顺畅，避免了卡顿的情况发生。当然可以理解的是，一般来说，导向孔32a2内还可以设置有导向套32a3，导向柱与导向套32a3滑动配合。
在一些更具体的实施方案中，上述环形刀刃310的具体结构形式可以为切刀套筒31的底端进行内倒角而形成，另外，通过大量试验测试得出，环形刀刃310的切刀角度a优选为30°，环形刀刃310的切刀宽度w优选为0.05mm。该环形刀刃的参数设计，能够保证环形刀刃的使用寿命在10万次以上，同时能够使得残料尽可能的保证在较小的尺寸，具体可以参见表2：
表2
Figure PCTCN2022091737-appb-000002
以上对本发明所提供的环形浇口模具进行了详细介绍。需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
还需要说明的是，在本文中，诸如术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括上述要素的物品或者设备中还存在另外的相同要素。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的普通技术人员来 说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (10)

  1. 一种环形浇口模具，其特征在于，包括前模仁(1)、后模仁(2)和切刀组件(3)，所述前模仁(1)上形成有浇注口，所述后模仁(2)正对所述浇注口的位置形成有锥形槽(21)，所述切刀组件(3)包括切刀套筒(31)和施压机构(32)，所述切刀套筒(31)滑动套设于唧咀(4)的外侧，所述唧咀(4)用于与注塑机连接且能够穿入所述浇注口并伸入至所述锥形槽(21)的正上方，所述切刀套筒(31)的底端形成有环形刀刃(310)，所述环形刀刃(310)与所述锥形槽(21)的外边沿相正对，所述施压机构(32)设置于所述切刀套筒(31)的顶部且用于向所述切刀套筒(31)施压以使所述环形刀刃(310)与所述锥形槽(21)的外边沿相抵。
  2. 如权利要求1所述的环形浇口模具，其特征在于，所述施压机构(32)包括与所述切刀套筒(31)的顶部固定连接的固定板(32a)和固定于所述固定板(32a)的顶面的施压盖板(32b)，所述固定板(32a)上形成有竖向布置的弹簧安装通槽(32a1)，所述弹簧安装通槽(32a1)内设置有复位弹簧(32c)，所述复位弹簧(32c)的一端与所述施压盖板(32b)固定连接，所述复位弹簧(32c)的另一端与所述前模仁(1)的顶面相抵，且所述复位弹簧(32c)具有使所述固定板(32a)的底面与所述前模仁(1)的顶面保持预设运动间隙的弹性力。
  3. 如权利要求2所述的环形浇口模具，其特征在于，所述前模仁(1)与所述后模仁(2)合模后所形成的浇口厚度为0.5mm，所述预设运动间隙不低于0.5mm。
  4. 如权利要求2所述的环形浇口模具，其特征在于，所述施压机构(32)还包括设置于所述施压盖板(32b)的顶部的驱动机构(32d)，所述驱动机构(32d)用于驱动所述施压盖板(32b)向下运动以使所述环形刀刃(310)与所述锥形槽(21)的外边沿相抵。
  5. 如权利要求4所述的环形浇口模具，其特征在于，所述驱动机构(32d)为直线伸缩杆机构。
  6. 如权利要求5所述的环形浇口模具，其特征在于，所述直线伸缩杆机构的数量为两个，且对称分布于所述唧咀(4)的两侧。
  7. 如权利要求6所述的环形浇口模具，其特征在于，所述直线伸缩杆机构为伸缩油缸，且两个所述伸缩油缸的油压管路(5)相连通并通过一条总管路与油压控制系统(6)连通。
  8. 如权利要求2所述的环形浇口模具，其特征在于，所述前模仁(1)的顶部设置有竖向布置的导向柱(11)，所述固定板(32a)上设置有与所述导向柱(11)相适配的导向孔(32a2)。
  9. 如权利要求2所述的环形浇口模具，其特征在于，所述固定板(32a)与所述施压盖板(32b)通过螺栓(32e)固定连接。
  10. 如权利要求1-9中任一项所述的环形浇口模具，其特征在于，所述环形刀刃(310)为所述切刀套筒(31)的底端内倒角形成，且环形刀刃(310)的切刀角度为30°，所述环形刀刃(310)的切刀宽度为0.05mm。
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