WO2023092247A1 - 外置油缸加压式注塑机 - Google Patents

外置油缸加压式注塑机 Download PDF

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Publication number
WO2023092247A1
WO2023092247A1 PCT/CN2021/132210 CN2021132210W WO2023092247A1 WO 2023092247 A1 WO2023092247 A1 WO 2023092247A1 CN 2021132210 W CN2021132210 W CN 2021132210W WO 2023092247 A1 WO2023092247 A1 WO 2023092247A1
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Prior art keywords
injection molding
hot runner
molding machine
runner
oil cylinder
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PCT/CN2021/132210
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English (en)
French (fr)
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朱建伟
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朱建伟
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Priority to PCT/CN2021/132210 priority Critical patent/WO2023092247A1/zh
Publication of WO2023092247A1 publication Critical patent/WO2023092247A1/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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/28—Closure devices therefor

Definitions

  • the invention belongs to the technical field of injection molds, and relates to a device capable of fully squeezing materials into a mold during injection molding, in particular to an external oil cylinder pressurized injection molding machine.
  • the injection molding process ensures that the product can be completely filled, and the product part is guaranteed to be deformed.
  • the main realization method is the pressure maintaining function of the injection molding machine (partial pressure needs to be pressurized through the hot runner needle valve), and the pressure of the injection molding machine is aimed at the entire
  • the pressurization of the mold and the injection molding pressurization function seriously affect the life of the mold, and the pressurization is directly pressurizing the entire product, causing the shrinkage of the later product to be uneven and cannot be effectively controlled.
  • the core device in injection molding equipment is the hot runner. Before the material enters the mold, it is melted through the hot runner and then injected into the mold.
  • the cost of the hot runner for transparent products is quite high, and the technical requirements are relatively high.
  • the price of a single piece is generally 60,000 RMB, and the hot runner system is not stable enough. It is difficult to control the heating of materials in the hot runner, which is easy to cause uneven heating. For products that are difficult to maintain pressure and difficult to form, simply use hot runners. For injection molding, it is difficult to guarantee the molding; in addition, the hot runner that needs to be kept under pressure is easily damaged, and requires frequent repairs and maintenance, and the maintenance is difficult and costly.
  • the object of the present invention is to provide an external oil cylinder pressurized injection molding machine with low cost, high stability and easy molding.
  • the external oil cylinder pressurized injection molding machine includes a hot runner and a runner, one end of the runner communicates with the hot runner, and the other end communicates with the sprue of the mold, wherein the middle of the runner A storage barrel is provided, and a heating device is installed on the outer wall of the storage barrel.
  • the material that has been heated by the hot runner is not directly injected into the mold, but first enters the storage barrel for secondary pressure-holding and heating.
  • the inner cavity of the storage barrel is provided with a pusher rod, and the end of the pusher rod is provided with a power device. Driven by the power device, the pusher rod injects the material in the storage barrel into the mold to complete the injection molding.
  • the power device is a hydraulic cylinder
  • the end of the piston rod on the hydraulic cylinder is provided with a transmission device
  • the piston rod is connected with the hydraulic cylinder to realize reciprocating motion. Transmission clearance, smooth operation.
  • the transmission device includes a base and a slider, and the two can slide relative to each other, the base is connected with the piston rod, and the slider is connected with the piston rod.
  • the push rod is connected, and the piston rod and the push rod are perpendicular to each other.
  • the slide rails are arranged obliquely, and the angle formed with the horizontal plane is between 30° and 60°. between; the slider is provided with a chute that matches the slide rail, through the relative sliding of the base and the slider, while transmitting the power, the transmission direction is changed, so that the power of the hydraulic cylinder can be rotated at a 90° corner
  • the form is transported to the storage tank.
  • the inner cavity of the hot runner is provided with a valve stem
  • the top of the hot runner is provided with a cylinder that drives the valve stem to move up and down.
  • the outlet of the hot runner is tapered, and the diameter of the end of the outlet is the same as the diameter of the valve stem.
  • the outlet of the hot runner is sealed by the valve stem to prevent material from being used. Return to the hot runner.
  • the heating device is a heating wire
  • the heating wire is wound on the outer wall of the storage barrel so that the materials in the storage barrel are heated evenly. Keep as a liquid.
  • this device can easily solve the problem, avoid using too expensive hot runners, and reduce the cost by more than 50%; Extrusion improves the stability of injection molding and the quality of product molding, improves the service life of the hot runner, and reduces maintenance costs; this structure can be placed in the desired pressurized area, and its range can be well controlled, that is, the mold can be guaranteed strength, and can control the molding process of the mold; in addition, the pressurization function of the injection molding machine is converted to the pressurization of the mold to reduce the performance requirements of the injection molding machine.
  • Fig. 1 is a front view schematic diagram of the present invention
  • Fig. 2 is a schematic cross-sectional view at C-C in Fig. 1;
  • Fig. 3 is the three-dimensional structure schematic diagram of the present invention.
  • Fig. 4 is a partially enlarged schematic diagram in Fig. 3;
  • External oil cylinder pressurized injection molding machine including a hot runner 10 and a runner 11, one end of the runner 11 communicates with the hot runner 10, and the other end It communicates with the pouring port of the mould, wherein, the middle part of the runner 11 is provided with a material storage cylinder 12, and the outer wall of the material storage cylinder 12 is provided with a heating device, and the heating device is a heating wire 13, and the heating wire 13 is wound around the outer wall of the storage barrel 12, so that the materials in the storage barrel 12 are heated evenly and remain in a liquid state.
  • the material heated by the hot runner 10 is not directly injected into the mold, but first enters the storage barrel 12 for secondary pressure-holding heating.
  • the inner cavity of the storage barrel 12 is provided with a pusher rod 14.
  • the end of the push rod 14 is provided with a power device, and the power device is a hydraulic cylinder 17. Driven by the power device, the push rod 14 injects the materials in the storage barrel 12 into the mold to complete injection molding.
  • the inner cavity of the hot runner 10 is provided with a valve stem 20, and the top of the hot runner 10 is provided with a cylinder 19 that drives the valve stem 20 to move up and down.
  • the discharge port 21 of the hot runner 10 is tapered, so The caliber at the end of the discharge port 21 is the same as the diameter of the valve stem 20.
  • the cylinder 19 drives the valve rod 20 to move down to seal the discharge port 21 of the hot runner 10 to prevent The material flows back into the hot runner 10.
  • the strong power provided by the hydraulic cylinder 17 injects the materials into the mold, which improves the quality of product molding, reduces the damage to the hot runner 10, and prolongs the service life.
  • the end of the piston rod 18 on the hydraulic cylinder 17 is provided with a transmission device, and the piston rod 18 is connected with the hydraulic cylinder 17 to realize reciprocating motion without transmission gap and stable operation.
  • Described transmission device comprises base 16 and slide block 15, and both can slide relatively, and described base 16 is connected with described piston rod 18, and described slide block 15 is connected with described push rod 14, and described piston
  • the rod 18 is perpendicular to the pushing rod 14 .
  • Two protruding slide rails 22 are arranged inside the base 16, and the slide rails 22 are arranged obliquely, forming an included angle of 45° with the horizontal plane.
  • This angle can ensure that when the base 16 and the slide block 15 slide relatively, the The power in the horizontal direction is converted into the power in the vertical direction to ensure that the force is 90° when reversing; the slider 15 is provided with a chute 23 that matches the slide rail 22, and the base 16 and the slide The relative sliding of the block 15 changes the transmission direction while transmitting the power, so that the power of the hydraulic cylinder 17 is delivered to the storage barrel 12 in the form of a 90° corner, which can reduce the vertical space occupied by the device.

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

一种外置油缸加压式注塑机，包括热流道(10)和流道(11)，流道(11)一端与热流道(10)连通，另一端与模具的浇注口连通，所述流道(11)的中部设置有存料筒(12)，所述存料筒(12)的外壁上设置有加热装置，所述存料筒(12)的内腔设置有推料杆(14)，所述推料杆(14)的末端设置有动力装置。对于难以保压难以成型的产品，通过本装置可避免使用过于昂贵的热流道，降低50％以上的成本；通过二次挤压，提高注塑的稳定性及产品成型的质量，提高热流道的使用寿命，降低维修成本，此结构可以放置在想要的加压的区域，能很好的控制其范围，既能保证模具强度，又能控制模具成型工艺。

Description

外置油缸加压式注塑机 技术领域
本发明属于注塑模技术领域，涉及一种注塑时能将用料充分挤压到模具内的设备，特指一种外置油缸加压式注塑机。
背景技术
目前注塑模成型工艺保证产品能完全填充满，又保证产品部变形，主要实现方式为注塑机保压功能(局部加压需要通过热流道针阀式再进行加压)，注塑机加压针对整个模具的加压，注塑加压功能严重影响模具寿命，而且加压是正对整个产品的加压，造成后期产品的收缩量不能均匀，无法有效的控制。
在注塑成型设备当中比较核心的装置就是热流道，用料在进入模具前，先通过热流道进行融化，然后注射到模具内，透明产品的热流道的成本相当高，技术要求也相对很高，单根的价格一般都要六万人民币，而且热流道的系统不够稳定，用料在热流道内受热难以控制，容易造成受热不均匀，对于难以保压，成型比较困难的产品，单纯的采用热流道进行注塑，成型难以得到保证；另外需要保压的热流道极易损坏，需要经常维修和保养，而且维修难度大，成本高。
发明内容
本发明的目的是提供一种造价低、稳定性高、成型容易的外置油缸加压式注塑机。
本发明的目的是这样实现的：外置油缸加压式注塑机，包括热流道和流道，流道一端与热流道连通，另一端与模具的浇注口连通，其中，所述流道的中部设置有存料筒，所述存料筒的外壁上设置有加热装置，经过热流道加热处理的用料不是直接注入到 模具内，而是先进入存料筒内进行二次保压加热，所述存料筒的内腔设置有推料杆，所述推料杆的末端设置有动力装置，在动力装置的驱动下，推料杆将存料筒内的用料注入模具内，完成注塑。
据上所述的外置油缸加压式注塑机，其中，所述动力装置为液压缸，所述液压缸上的活塞杆末端设置有传动装置，活塞杆与液压缸连接，实现往复运动，没有传动间隙，运行平稳。
据上所述的外置油缸加压式注塑机，其中，所述传动装置包括基座和滑块，且两者可相对滑动，所述基座与所述活塞杆连接，所述滑块与所述推料杆连接，所述活塞杆与所述推料杆相互垂直。
据上所述的外置油缸加压式注塑机，其中，所述基座内部设置有两条凸起的滑轨，所述滑轨倾斜设置，与水平面形成的夹角在30°～60°之间；所述滑块上设置有与所述滑轨相配合的滑槽，通过基座和滑块的相对滑动，传递动力的同时，改变了传递方向，使液压缸的动力以90°拐角的形式输送到所述存料筒上。
据上所述的外置油缸加压式注塑机，其中，所述热流道的内腔设置有阀杆，所述热流道的顶端设置有驱动所述阀杆上下移动的气缸，所述热流道的出料口呈锥形，所述出料口末端的口径与所述阀杆的直径相同，在进行二次挤压时，通过阀杆封住所述热流道的出料口，防止用料回流到所述热流道内。
据上所述的外置油缸加压式注塑机，其中，所述加热装置为加热丝，所述加热丝绕在所述存料筒的外壁上，使存料筒内的用料受热均匀，保持为液态。
本发明相比现有技术突出且有益的技术效果是：对于难以保压难以成型的产品，通过本装置可以轻松解决，避免使用过于昂贵的热流道，可降低50％以上的成本；通过二次挤压，提高注塑的稳定性及产品成型的质量，提高热流道的使用寿命，降低维修成本；此结构可以放置在想要的加压的区域，可以很好的控制其范围，即能保证模具强度，又能控制模具成型工艺；另外，把注 塑机加压功能转换至模具加压，降低对注塑机的性能要求。
附图说明
图1是本发明的主视示意图；
图2是图1中C-C处的剖视示意图；
图3是本发明的立体结构示意图；
图4是图3中的局部放大示意图；
图中：10-热流道，11-流道，12-存料筒，13-加热丝，14-推料杆，15-滑块，16-基座，17-液压缸，18-活塞杆，19-气缸，20-阀杆，21-出料口，22-滑轨，23-滑槽。
具体实施方式
下面结合附图以具体实施例对本发明作进一步描述，参见图1—4：外置油缸加压式注塑机，包括热流道10和流道11，流道11一端与热流道10连通，另一端与模具的浇注口连通，其中，所述流道11的中部设置有存料筒12，所述存料筒12的外壁上设置有加热装置，所述加热装置为加热丝13，所述加热丝13绕在所述存料筒12的外壁上，使存料筒12内的用料受热均匀，保持为液态。经过热流道10加热处理的用料不是直接注入到模具内，而是先进入存料筒12内进行二次保压加热，所述存料筒12的内腔设置有推料杆14，所述推料杆14的末端设置有动力装置，所述动力装置为液压缸17，在动力装置的驱动下，推料杆14将存料筒12内的用料注入模具内，完成注塑。所述热流道10的内腔设置有阀杆20，所述热流道10的顶端设置有驱动所述阀杆20上下移动的气缸19，所述热流道10的出料口21呈锥形，所述出料口21末端的口径与所述阀杆20的直径相同，在进行二次挤压时，气缸19驱动阀杆20下移，封住所述热流道10的出料口21，防止用料回流到所述热流道10内。通过挤压的转换，用液压缸17提 供的强劲动力将用料注入模具内，提高了产品成型的质量，同时降低了对热流道10的损害，延长使用寿命。
具体地，所述液压缸17上的活塞杆18末端设置有传动装置，活塞杆18与液压缸17连接，实现往复运动，没有传动间隙，运行平稳。所述传动装置包括基座16和滑块15，且两者可相对滑动，所述基座16与所述活塞杆18连接，所述滑块15与所述推料杆14连接，所述活塞杆18与所述推料杆14相互垂直。所述基座16内部设置有两条凸起的滑轨22，所述滑轨22倾斜设置，与水平面形成的夹角45°，此角度可保证基座16和滑块15相对滑动时，将水平方向的力转换成竖直方向上的力，保证力在换向时呈90°；所述滑块15上设置有与所述滑轨22相配合的滑槽23，通过基座16和滑块15的相对滑动，传递动力的同时，改变了传递方向，使液压缸17的动力以90°拐角的形式输送到所述存料筒12上，可减小装置竖直方向的占用空间。
上述实施例仅为本发明的较佳实施例，并非依此限制本发明的保护范围，故：凡依本发明的结构、形状、原理所做的等效变化，均应涵盖于本发明的保护范围之内。

Claims (3)

  1. 外置油缸加压式注塑机，包括热流道和流道，流道一端与热流道连通，另一端与模具的浇注口连通，其特征在于：所述流道的中部设置有存料筒，所述存料筒的外壁上设置有加热装置，所述存料筒的内腔设置有推料杆，所述推料杆的末端设置有动力装置；所述动力装置为液压缸，所述液压缸上的活塞杆末端设置有传动装置；所述传动装置包括基座和滑块，且两者可相对滑动，所述基座与所述活塞杆连接，所述滑块与所述推料杆连接；所述基座内部设置有两条凸起的滑轨，所述滑轨倾斜设置，与水平面形成的夹角在30°～60°之间；所述滑块上设置有与所述滑轨相配合的滑槽。
  2. 根据权利要求1所述的外置油缸加压式注塑机，其特征在于：所述热流道的内腔设置有阀杆，所述热流道的顶端设置有驱动所述阀杆上下移动的气缸，所述热流道的出料口呈锥形，所述出料口末端的口径与所述阀杆的直径相同。
  3. 根据权利要求1所述的外置油缸加压式注塑机，其特征在于：所述加热装置为加热丝，所述加热丝绕在所述存料筒的外壁上。
PCT/CN2021/132210 2021-11-23 2021-11-23 外置油缸加压式注塑机 WO2023092247A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449795A (en) * 1965-09-09 1969-06-17 Alfred Fischbach Mold closing means for injection mold machine
DE1554952B1 (de) * 1959-08-06 1972-05-31 Uniroyal Inc Schaltwerk fuer Rundtisch-Spritzgiessmaschinen
CN1507999A (zh) * 2002-12-13 2004-06-30 四川大学 热流道注射成型动态保压装置
CN101844404A (zh) * 2009-03-25 2010-09-29 蔡伽依 塑料连续注挤机
CN104369312A (zh) * 2014-09-29 2015-02-25 朱建伟 外置油缸加压式注塑机
CN204196116U (zh) * 2014-09-29 2015-03-11 朱建伟 外置油缸加压式注塑机
CN110341126A (zh) * 2019-07-03 2019-10-18 优耐富（长兴）自动化设备有限公司 一种电池壳热流道模具结构及其成型方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1554952B1 (de) * 1959-08-06 1972-05-31 Uniroyal Inc Schaltwerk fuer Rundtisch-Spritzgiessmaschinen
US3449795A (en) * 1965-09-09 1969-06-17 Alfred Fischbach Mold closing means for injection mold machine
DE1529931A1 (de) * 1965-09-09 1970-05-27 Alfred Fischbach Spritzgiessmaschine
CN1507999A (zh) * 2002-12-13 2004-06-30 四川大学 热流道注射成型动态保压装置
CN101844404A (zh) * 2009-03-25 2010-09-29 蔡伽依 塑料连续注挤机
CN104369312A (zh) * 2014-09-29 2015-02-25 朱建伟 外置油缸加压式注塑机
CN204196116U (zh) * 2014-09-29 2015-03-11 朱建伟 外置油缸加压式注塑机
CN110341126A (zh) * 2019-07-03 2019-10-18 优耐富（长兴）自动化设备有限公司 一种电池壳热流道模具结构及其成型方法

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