WO2017140086A1 - 一种注塑模具自切浇口机构 - Google Patents

一种注塑模具自切浇口机构 Download PDF

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Publication number
WO2017140086A1
WO2017140086A1 PCT/CN2016/090385 CN2016090385W WO2017140086A1 WO 2017140086 A1 WO2017140086 A1 WO 2017140086A1 CN 2016090385 W CN2016090385 W CN 2016090385W WO 2017140086 A1 WO2017140086 A1 WO 2017140086A1
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WO
WIPO (PCT)
Prior art keywords
gate
cutter
injection
insert
mold
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Application number
PCT/CN2016/090385
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English (en)
French (fr)
Inventor
魏霓
刘俊麟
吴明华
Original Assignee
上海小糸车灯有限公司
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.)
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Publication date
Priority claimed from CN201610089265.2A external-priority patent/CN105599238A/zh
Priority claimed from CN201620124956.7U external-priority patent/CN205705112U/zh
Application filed by 上海小糸车灯有限公司 filed Critical 上海小糸车灯有限公司
Publication of WO2017140086A1 publication Critical patent/WO2017140086A1/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

Definitions

  • the present invention relates to injection molding of plastic or plastic state materials and apparatus therefor, and more particularly to a cutting device for a gate or an ingate of an injection molding apparatus.
  • the lens, light guide and mirror of the automobile lamp have complex geometric shapes, and are usually injection molded by BMC material (bulk molding compound) or PC material (polycarbonate plastic).
  • BMC material bulk molding compound
  • PC material polycarbonate plastic
  • the existing injection mold gate structure is generally a simple gate. After injection molding, the product needs to be manually removed and the excess burrs at the gate are flattened. The gate removal process not only wastes a lot of human resources, but also easily damages the product when shaving, increasing the loss of the product.
  • gate cutting injection mold discloses a gate cutting injection mold, including: base, upper mold, lower mold, top plate, guide pillar guide sleeve
  • the injection tube, the die, the spring and the heater the base is provided with a lower mold
  • the lower mold is provided with an upper mold
  • the top plate is disposed around the upper mold
  • a guide post guide sleeve is disposed around the upper mold
  • the injection tube is disposed on the upper portion
  • a die is arranged in the injection tube
  • the spring is sleeved on the die
  • a heater is arranged outside the injection tube.
  • the front end of the gate of the gate cutting injection mold is provided with a cutting head, which can facilitate the cutting of the gate to facilitate the removal of the gate mark.
  • a cutting head which can facilitate the cutting of the gate to facilitate the removal of the gate mark.
  • the cutting head of the above technical solution is placed inside the gate, which cannot meet the requirements of gates of different shapes, and can not be adapted to small batches at all. The requirements of a multi-variety of modern production models.
  • the technical solution adopted by the present invention to solve the above technical problems is:
  • An injection mold self-cutting gate mechanism consisting of a cutter device and a driving device for driving the cutter device for removing a gate of an injection molded product, characterized in that the cutter device comprises forming after clamping a first gate insert and a second gate insert for the injection passage, a gate cutter for cutting the gate and a gate holder for the fixed gate cutter, and a gate cutter and a gate holder Providing a guiding cutter guide sleeve; the inside of the second gate insert is cut and cut with a gate a cutter guide groove of the knife sliding fit; the center line of the cutter guide groove and the cutter guide sleeve is in line with the linear movement direction of the gate cutter; the gate cutter is detachably fixed to the gate cutter The seat passes through the cutter guide groove inside the second gate insert in a sliding fit manner, and the gate seat passes through the cutter guide sleeve in a sliding fit manner to form two guide lines of the gate cutter
  • the driving method drives the gate holder to move along the cutter guide sleeve, and
  • a preferred technical solution of the self-cutting gate mechanism of the injection mold of the present invention is characterized in that the maximum pressure that the cylinder bore can withstand is greater than the injection pressure of the gate cutter during the injection molding process;
  • the hydraulic cylinder can provide the locking force of the gate cutter during the mold clamping and the cutting drive force of the gate cutter during the ejection of the injection product.
  • a better technical solution of the self-cutting gate mechanism of the injection mold of the present invention is characterized in that the cutter guide sleeve is fixed on the movable mold side of the injection mold through a cutter guide sleeve; the driving device
  • the utility model comprises a bevel chute, a connecting rod and a hydraulic cylinder; the head of the inclined trough is connected to the T-shaped slider of the gate holder by an oblique T-shaped groove, and the tail of the inclined trough passes through the normal T-shaped groove a connecting rod connected to the hydraulic cylinder constitutes a ramp slider structure for driving the gate cutter; the hydraulic cylinder pushes the gate holder along the cutter guide sleeve through the inclined sliding groove, and drives the gate cutter to be in the second pouring
  • the cutter block of the mouth insert slides in the guide groove; the gate cutter cooperates with the first gate insert to generate a shearing force to cut off the gate connected to the injection molded product.
  • the injection molding machine for the self-contained side ejection mechanism characterized in that the driving device is the fixed mold side of the injection molding machine.
  • the thrust member of the mechanism, the cutter guide sleeve is fixed on the fixed mold side of the injection mold through the cutter guide sleeve, and the gate holder is connected to the fixed mold side ejection mechanism of the injection molding machine, and is molded by injection molding.
  • the ejection force on the fixed mold side pushes the gate cutter and the first gate insert together to generate shear force, and the injection gate is cut off before the mold is ejected from the mold.
  • An improved technical solution of the self-cutting gate mechanism of the injection mold of the present invention is characterized in that the first gate insert is embedded with a gate insert pad and adjusted by adjusting the gate insert pad
  • the matching gap between the cutter and the gate cutter makes the gate insert pad and the cutting edge of the gate cutter closely fit to prevent the injection material from remaining in the fit gap to form a waste edge.
  • a preferred technical solution of the self-cutting gate mechanism of the injection mold of the present invention is characterized in that the shape of the gate cutter is consistent with the shape of the gate portion of the injection product, and the angle of the cutting edge of the gate cutter is It is 45 to 55° and the thickness of the cutting edge is 1.0 to 1.5 mm.
  • the injection mold of the present invention adopts a second gate insert and a first gate insert structure for the self-cut gate mechanism, and
  • the structure of the gates with different shapes according to the injection molding product is quickly and flexibly configured, and is easy to repair and replace.
  • the replaceable gate insert pad structure is convenient for adjusting the gap between the cutter and the die during the gate cutting process, and the injection molding material can be prevented from remaining in the gap to form a waste edge, thereby improving the efficiency of injection molding production.
  • the injection mold of the invention has a two-stage guiding method for the gate cutter of the self-cutting gate mechanism, which can effectively ensure the stability of the gate cutter movement, thereby ensuring the cutting quality and improving the life of the cutter.
  • the self-cutting gate mechanism of the injection mold of the invention can realize the self-cutting of the gate of the injection product, can adapt to the requirements of the modern production mode of small batches and varieties, can not only save human resources, but also optimize the gate cross section and reduce the product. Scrap rate, reduce product loss.
  • FIG. 1 is a schematic perspective view showing the structure of a self-cutting gate of an injection mold of the present invention
  • Figure 2 is a plan view of the self-cutting gate mechanism of the injection mold of the present invention.
  • Figure 3 is a cross-sectional view showing the injection molding state of the injection mold of the present invention from the state of injection molding of the gate mechanism;
  • Figure 4 is a cross-sectional view taken along the line B-B of the injection molding state of the injection mold of the present invention.
  • Figure 5 is a cross-sectional view showing the state in which the cutting edge of the injection mold of the present invention is closed;
  • Figure 6 is a cross-sectional view taken along line B-B of the cutting edge of the injection mold of the injection mold of the present invention.
  • Figure 7 is a schematic view showing the use of a gate insert pad to adjust the gap between the cutter and the die during the gate cutting process
  • Figure 8 is a schematic view showing a gate cutter of a self-cut gate mechanism of an injection mold of the present invention.
  • FIG. 9 is a schematic view showing the gap between the gate cutter and the first gate insert of the injection mold from the gate mechanism.
  • FIGS. 1 to 4 are an embodiment of an injection mold self-cutting gate mechanism of the present invention for removing a gate of an injection molded product, which is composed of a cutter device 10 and a driving device 20 for driving the cutter device 10, such as As shown in Figures 3 and 4, the cutter device 10 includes a first gate insert 11 and a second gate insert 13 which are formed to form an injection molding material injection passage after clamping, and are used for cutting the gate of the gate.
  • the knife 14 and the gate holder 15 of the fixed gate cutter, and the gate cutter 14 And the gate holder 15 provides a guiding cutter guide sleeve 16; the inside of the second gate insert 13 is cut with a cutter guide groove 19 which is slidably engaged with the gate cutter 14; the cutter guide groove 19 And the center line of the cutter guide sleeve 16 is collinear with the linear movement direction of the gate cutter 14; the gate cutter 14 is detachably fixed to the gate holder 15 and passes through the sliding fit manner.
  • the gate holder 15 passes through the cutter guide sleeve 16 in a sliding fit manner to form a two-stage guide linear motion mode of the gate cutter 14; the driving device 20 pushes the gate
  • the knife seat 15 moves along the cutter guide sleeve 16 to drive the gate cutter 14 to slide in the cutter guide groove 19 of the second gate insert 13 to cooperate with the first gate insert 11 to generate shearing force and cut the connection.
  • the gate 30 of the injection molded product 40 The gate 30 of the injection molded product 40.
  • the first gate insert 11 is fitted with a gate insert spacer 12, which is adjusted by the gate setting.
  • the matching gap between the block pad 12 and the gate cutter 14 closely matches the gate insert pad 12 and the cutting edge of the gate cutter 14 to prevent the injection material from remaining in the matching gap to form a waste edge, thereby affecting The molding quality of the next mold.
  • the matching relationship between the gate insert pad 12 and the blade portion of the gate cutter 14 is shown in Figs. 7 and 8 (partial enlarged view).
  • the maximum pressure that the cylinder 23 can withstand is greater than the injection pressure of the gate cutter 14 during the injection molding process; the hydraulic cylinder 23 can The locking force of the gate cutter 14 is provided during the mold clamping injection molding, and the cutting driving force of the gate cutter 14 can be provided during the ejection of the injection molded product.
  • the cutter guide sleeve 16 is fixed to the movable mold side of the injection mold by the cutter guide sleeve 17 according to the embodiment of the injection mold of the present invention shown in FIGS. 1 and 3.
  • the driving device 20 includes a bevel chute 21, a connecting rod 22 and a hydraulic cylinder 23; the head of the inclined chute 21 is connected to the T-shaped slider 18 of the gate holder 15 by an oblique T-shaped groove, the inclined surface
  • the tail portion of the chute 21 is connected to the connecting rod 22 of the hydraulic cylinder 23 through a normal T-shaped groove, and constitutes a beveled slider structure for driving the gate cutter 14; the hydraulic cylinder 23 pushes the gate holder through the inclined chute 21.
  • the gate 15 moves along the cutter guide sleeve 16 to drive the gate cutter 14 to slide within the cutter guide groove 19 of the second gate insert 13; the gate cutter 14 cooperates with the first gate insert 11 to produce The gate 30 that connects the injection molded product 40 is cut by shearing force.
  • the gate cutter 14 of the injection mold of the present invention from the gate mechanism can be driven in a variety of ways and in various forms, such as hydraulic, pneumatic or electric cylinders and thimble plates.
  • 9 is an embodiment of an injection molding die self-cutting gate mechanism for a BMC mirror mold of the present invention, which is used for an injection molding machine with a fixed-die side ejection mechanism, and the driving device 20 is a fixed mold of an injection molding machine.
  • the thrust member of the side ejector mechanism, the cutter guide sleeve 16 is fixed to the fixed mold side of the injection mold by a cutter guide sleeve 17, and the gate holder 15 is connected to the fixed mold side of the injection molding machine.
  • the outlet mechanism relies on the ejection force on the fixed side of the injection molding machine to push the gate cutter 14 and the first gate insert 11 to form a shearing force, and the gate 30 is cut before the injection molded product 40 is ejected from the mold.
  • the gate cutter 14 is shown in FIG.
  • the positional relationship of the gate holder 15 and the first gate insert 11 is shown, and the injection mold is indicated by a broken line.
  • the shape of the gate cutter 14 is identical to the shape of the gate portion of the injection molded product 40, and the angle of the cutting edge of the gate cutter 14 is 45. ⁇ 55°, the cutting edge thickness is 1.0 to 1.5 mm, see Figure 8.
  • the action flow of the self-cutting gate mechanism of the injection mold of the present invention is as follows:
  • the hydraulic cylinder 23 drives the gate cutter 14 to be placed in an injection state, as shown in FIGS. 3 and 4;
  • the second step the mold clamping mold injection molding material through the injection channel and pressure forming, forming an injection molded product 40;
  • the hydraulic cylinder 23 supplies oil, and the gate cutter 14 is driven to move upward to the knife edge closed state. As shown in FIG. 5 and FIG. 6, the gate 30 formed by the injection molding material in the injection channel is cut off;
  • the injection molding product 40 is ejected, and the workpiece is taken by the robot.
  • the hydraulic cylinder 23 is reversely fed to the oil, and the gate cutter 14 is driven back to the injection molding state;
  • the mold is injected again, and the injection molding cycle is repeated.

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

Abstract

一种注塑模具自切浇口机构，由切刀装置(10)和驱动装置(20)构成，切刀装置(10)包括第一浇口镶块(11)和第二浇口镶块(13)，浇口切刀(14)以可拆卸方式固定在浇口刀座(15)上，以滑动配合方式穿过切刀导槽(19)，浇口刀座(15)以滑动配合方式穿过切刀导套(16)，形成浇口切刀(14)的两段导向直线运动方式；驱动装置(20)推动浇口切刀(14)与第一浇口镶块(11)配合产生剪切力，切断连接注塑产品(40)的浇口(30)。该注塑模具自切浇口机构可以根据注塑产品(40)不同形状浇口(30)的结构灵活地配置，便于快速维修更换，便于调整浇口切断过程中浇口切刀(14)与模具之间的间隙，可以避免注塑材料残留在间隙中形成废边，提高注塑生产的效率。

Description

一种注塑模具自切浇口机构 技术领域
本发明涉及塑料或塑性状态物质的注射成型及其设备，尤其涉及一种用于注塑设备的浇口或内浇口的切断装置。
背景技术
汽车灯具的透镜、光导和反射镜等几何形状复杂，通常采用BMC材料(团状模塑料)或PC材料(聚碳酸酯塑料)注塑成型，现有的注塑模具浇口结构一般为简易浇口，产品注塑成型后需要人为将浇口拆除，并将浇口处多余的毛边刮平。浇口拆除过程不仅会浪费大量的人力资源，而且还很容易在刮毛边时将产品损坏，增加产品的损耗。
中国发明专利申请“浇口切割注塑模具”(发明专利申请号：201410431137.2申请公布号：CN104175498A)公开了一种浇口切割注塑模具，包括：底座、上模具、下模具、顶板、导柱导套、注塑管、管芯、弹簧和加热器，所述底座设置有下模具、下模具上设置有上模具，顶板设置在上模具上方底座四周设置有导柱导套，所述注塑管设置在上模具上方，且与上模具中心轴线同轴布置，注塑管内设置有管芯，弹簧套接在管芯上，注塑管外侧设置有加热器。该浇口切割注塑模具的管芯前端设置有切断头，可方便切断的浇口实现浇口痕迹的清除。但是，由于汽车灯具的透镜、光导和反射镜等几何形状复杂，其浇口形状也是千差万别，上述技术方案的切断头置于浇口内部，无法满足不同形状浇口的要求，完全不能适应小批量多品种的现代化生产模式的要求。
发明内容
本发明的目的在于提供一种用于清除注塑产品的浇口的注塑模具自切浇口机构，本发明解决上述技术问题所采用的技术方案是：
一种注塑模具自切浇口机构，由切刀装置和用于驱动切刀装置的驱动装置构成，用于清除注塑产品的浇口，其特征在于，所述的切刀装置包括合模后形成注入通道的第一浇口镶块和第二浇口镶块，用于切断浇口的浇口切刀和固定浇口切刀的浇口刀座，以及为浇口切刀及浇口刀座提供导向的切刀导套；所述第二浇口镶块的内部开凿有与浇口切 刀滑动配合的切刀导槽；所述切刀导槽和切刀导套的中线与浇口切刀的直线运动方向共线；所述的浇口切刀以可拆卸方式固定在浇口刀座上，以滑动配合方式穿过第二浇口镶块内部的切刀导槽，所述的浇口刀座以滑动配合方式穿过切刀导套，形成浇口切刀的两段导向直线运动方式；所述的驱动装置推动浇口刀座沿切刀导套运动，带动浇口切刀在第二浇口镶块的切刀导槽内滑动，与第一浇口镶块配合产生剪切力，切断连接注塑产品的浇口。
本发明的注塑模具自切浇口机构的一种较佳的技术方案，其特征在于所述液压缸缸径所能承受的最大压力大于注塑过程中浇口切刀所承受的注塑压力；所述的液压缸既能够在模具合模注塑期间提供浇口切刀的锁紧力，又能够在注塑产品顶出脱模过程中提供浇口切刀的切断驱动力。
本发明的注塑模具自切浇口机构的一种更好的技术方案，其特征在于所述的切刀导套通过切刀导套垫板固定在注塑模具的动模侧；所述的驱动装置包括斜面滑槽，连接杆和液压缸；所述斜面滑槽的头部通过斜向T型槽连接到浇口刀座的T型滑块，所述斜面滑槽的尾部通过法向T型槽连接到液压缸的连接杆，构成驱动浇口切刀的斜面滑块结构；所述的液压缸通过斜面滑槽推动浇口刀座沿切刀导套运动，带动浇口切刀在第二浇口镶块的切刀导槽内滑动；所述的浇口切刀与第一浇口镶块配合产生剪切力，切断连接注塑产品的浇口。
本发明的注塑模具自切浇口机构的另一种更好的技术方案，用于自带定模侧顶出机构的注塑机，其特征在于所述的驱动装置为注塑机的定模侧顶出机构的推力部件，所述的切刀导套通过切刀导套垫板固定在注塑模具的定模侧，所述的浇口刀座连接到注塑机的定模侧顶出机构，依靠注塑机定模侧的顶出推力，推动浇口切刀与第一浇口镶块贴合并产生剪切力，在注塑产品顶出模具之前切断其浇口。
本发明的注塑模具自切浇口机构的一种改进的技术方案，其特征在于所述的第一浇口镶块上嵌装有浇口镶块垫板，通过调整浇口镶块垫板调节切刀与浇口切刀之间的配合间隙，使浇口镶块垫板与浇口切刀的切割刃严密配合，以避免注塑材料残留在整配间隙内形成废边。
本发明的注塑模具自切浇口机构的一种优选的技术方案，其特征在于所述浇口切刀的造型与注塑产品浇口部位的形状一致，所述浇口切刀的切割刃夹角为45～55°，切割刃厚度为1.0～1.5mm。
本发明的有益效果是：
1、本发明的注塑模具自切浇口机构采用第二浇口镶块和第一浇口镶块结构，可以 根据注塑产品不同形状浇口的结构快速灵活地配置，并且便于快速维修更换。采用可替换式的浇口镶块垫板结构，便于调整浇口切断过程中切刀与模具之间的间隙，可以避免注塑材料残留在间隙中形成废边，提高注塑生产的效率。
2、本发明的注塑模具自切浇口机构的浇口切刀采用两段导向方式，可以有效保证浇口切刀运动的稳定性，从而保证切断质量并提高切刀寿命。
3、本发明的注塑模具自切浇口机构可以实现注塑产品的浇口自切，能够适应小批量多品种的现代化生产模式的要求，不仅可以节省人力资源，还可以优化浇口截面，减少产品报废率，降低产品损耗。
附图说明
图1为本发明的注塑模具自切浇口机构的立体结构示意图；
图2为本发明的注塑模具自切浇口机构的俯视图；
图3为本发明的注塑模具自切浇口机构注塑状态的A-A剖视图；
图4为本发明的注塑模具自切浇口机构注塑状态的B-B剖视图；
图5为本发明的注塑模具自切浇口机构刀口闭合状态的A-A剖视图；
图6为本发明的注塑模具自切浇口机构刀口闭合状态的B-B剖视图；
图7为使用浇口镶块垫板调整浇口切断过程中切刀与模具间隙的示意图；
图8为本发明的注塑模具自切浇口机构的浇口切刀刀口示意图；
图9为注塑模具自切浇口机构的浇口切刀与第一浇口镶块配合间隙示意图。
以上图中的各部件的标号：10-切刀装置，11-第一浇口镶块，12-浇口镶块垫板，13-第二浇口镶块，14-浇口切刀，15-浇口刀座，16-切刀导套，17-切刀导套垫板，18-T型滑块，20-驱动装置，21-斜面滑槽，22-连接杆，23-液压缸，30-浇口，31-配合间隙，40-注塑产品。
具体实施方式
为了能更好地理解本发明的上述技术方案，下面结合附图和实施例进行进一步地详细描述。
图1至图4是本发明的注塑模具自切浇口机构的一个实施例，用于清除注塑产品的浇口，由切刀装置10和用于驱动切刀装置10的驱动装置20构成，如图3和图4所示，所述的切刀装置10包括合模后形成注塑材料注入通道的第一浇口镶块11和第二浇口镶块13，用于切断浇口的浇口切刀14和固定浇口切刀的浇口刀座15，以及为浇口切刀14 及浇口刀座15提供导向的切刀导套16；所述第二浇口镶块13的内部开凿有与浇口切刀14滑动配合的切刀导槽19；所述切刀导槽19和切刀导套16的中线与浇口切刀14的直线运动方向共线；所述的浇口切刀14以可拆卸方式固定在浇口刀座15上，以滑动配合方式穿过所述的切刀导槽19，所述的浇口刀座15以滑动配合方式穿过切刀导套16，形成浇口切刀14的两段导向直线运动方式；所述的驱动装置20推动浇口刀座15沿切刀导套16运动，带动浇口切刀14在第二浇口镶块13的切刀导槽19内滑动，与第一浇口镶块11配合产生剪切力，切断连接注塑产品40的浇口30。
根据图1和图3所示的本发明的注塑模具自切浇口机构的实施例，所述的第一浇口镶块11上嵌装有浇口镶块垫板12，通过调整浇口镶块垫板12与浇口切刀14之间的配合间隙，使浇口镶块垫板12与浇口切刀14的切割刃严密配合，以避免注塑材料残留在配合间隙内形成废边，影响下一模的成型质量。浇口镶块垫板12与浇口切刀14刀刃部的配合关系参见图7和图8(局部放大图)。
根据本发明的注塑模具自切浇口机构的实施例，所述液压缸23缸径所能承受的最大压力大于注塑过程中浇口切刀14所承受的注塑压力；所述的液压缸23既能够在模具合模注塑期间提供浇口切刀14的锁紧力，又能够在注塑产品顶出脱模过程中提供浇口切刀14的切断驱动力。
根据图1和图3所示的本发明的注塑模具自切浇口机构的实施例，所述的切刀导套16通过切刀导套垫板17固定在注塑模具的动模侧；所述的驱动装置20包括斜面滑槽21，连接杆22和液压缸23；所述斜面滑槽21的头部通过斜向T型槽连接到浇口刀座15的T型滑块18，所述斜面滑槽21的尾部通过法向T型槽连接到液压缸23的连接杆22，构成驱动浇口切刀14的斜面滑块结构；所述的液压缸23通过斜面滑槽21推动浇口刀座15沿切刀导套16运动，带动浇口切刀14在第二浇口镶块13的切刀导槽19内滑动；所述的浇口切刀14与第一浇口镶块11配合产生剪切力，切断连接注塑产品40的浇口30。
本发明的注塑模具自切浇口机构的浇口切刀14可以采用多种方式及多种形式驱动，例如液压、气动或电动缸以及顶针板等。图9是本发明的注塑模具自切浇口机构用于BMC反射镜模具的一个实施例，用于自带定模侧顶出机构的注塑机，所述的驱动装置20为注塑机的定模侧顶出机构的推力部件，所述的切刀导套16通过切刀导套垫板17固定在注塑模具的定模侧，所述的浇口刀座15连接到注塑机的定模侧顶出机构，依靠注塑机定模侧的顶出推力，推动浇口切刀14与第一浇口镶块11贴合并产生剪切力，在注塑产品40顶出模具之前切断其浇口30。为清楚起见，图9中仅表示出浇口切刀14、 浇口刀座15和第一浇口镶块11的位置配合关系，并且用虚线表示注塑模具。
根据本发明的注塑模具自切浇口机构的优选实施例，所述浇口切刀14的造型与注塑产品40浇口部位的形状一致，所述浇口切刀14的切割刃夹角为45～55°，切割刃厚度为1.0～1.5mm，参见图8。
本发明的注塑模具自切浇口机构的动作流程如下：
第一步，液压缸23驱动浇口切刀14置于注塑状态，如图3和图4所示；
第二步，模具合模通过注入通道注射注塑材料并保压成型，形成注塑产品40；
第三步，保压结束后，液压缸23给油，驱动浇口切刀14向上移动至刀口闭合状态，如图5和图6所示，将注入通道内注塑材料形成的浇口30切断；
第四步，注塑产品40顶出，通过机械手进行取件，取件后，液压缸23反向给油，驱动浇口切刀14回到注塑的状态；
第五步，返回第二步再次合模注塑，周而复始形成注塑循环。
本技术领域中的普通技术人员应当认识到，以上的实施例仅是用来说明本发明的技术方案，而并非用作为对本发明的限定，任何基于本发明的实质精神对以上所述实施例所作的变化、变型，都将落在本发明的权利要求的保护范围内。

Claims (6)

  1. 一种注塑模具自切浇口机构，由切刀装置和用于驱动切刀装置的驱动装置构成，用于清除注塑产品的浇口，其特征在于，所述的切刀装置包括合模后形成注入通道的第一浇口镶块和第二浇口镶块，用于切断浇口的浇口切刀和固定浇口切刀的浇口刀座，以及为浇口切刀及浇口刀座提供导向的切刀导套；所述第二浇口镶块的内部开凿有与浇口切刀滑动配合的切刀导槽；所述切刀导槽和切刀导套的中线与浇口切刀的直线运动方向共线；所述的浇口切刀以可拆卸方式固定在浇口刀座上，以滑动配合方式穿过第二浇口镶块内部的切刀导槽，所述的浇口刀座以滑动配合方式穿过切刀导套，形成浇口切刀的两段导向直线运动方式；所述的驱动装置推动浇口刀座沿切刀导套运动，带动浇口切刀在第二浇口镶块的切刀导槽内滑动，与第一浇口镶块配合产生剪切力，切断连接注塑产品的浇口。
  2. 根据权利要求1所述的注塑模具自切浇口机构，其特征在于所述液压缸缸径所能承受的最大压力大于注塑过程中浇口切刀所承受的注塑压力；所述的液压缸既能够在模具合模注塑期间提供浇口切刀的锁紧力，又能够在注塑产品顶出脱模过程中提供浇口切刀的切断驱动力。
  3. 根据权利要求1所述的注塑模具自切浇口机构，其特征在于所述的切刀导套通过切刀导套垫板固定在注塑模具的动模侧；所述的驱动装置包括斜面滑槽，连接杆和液压缸；所述斜面滑槽的头部通过斜向T型槽连接到浇口刀座的T型滑块，所述斜面滑槽的尾部通过法向T型槽连接到液压缸的连接杆，构成驱动浇口切刀的斜面滑块结构；所述的液压缸通过斜面滑槽推动浇口刀座沿切刀导套运动，带动浇口切刀在第二浇口镶块的切刀导槽内滑动；所述的浇口切刀与第一浇口镶块配合产生剪切力，切断连接注塑产品的浇口。
  4. 根据权利要求1所述的注塑模具自切浇口机构，用于自带定模侧顶出机构的注塑机，其特征在于所述的驱动装置为注塑机的定模侧顶出机构的推力部件，所述的切刀导套通过切刀导套垫板固定在注塑模具的定模侧，所述的浇口刀座连接到注塑机的定 模侧顶出机构，依靠注塑机定模侧的顶出推力，推动浇口切刀与第一浇口镶块贴合并产生剪切力，在注塑产品顶出模具之前切断其浇口。
  5. 根据权利要求1至4之任一权利要求所述的注塑模具自切浇口机构，其特征在于所述的第一浇口镶块上嵌装有浇口镶块垫板，通过调整浇口镶块垫板调节切刀与浇口切刀之间的配合间隙，使浇口镶块垫板与浇口切刀的切割刃严密配合，以避免注塑材料残留在整配间隙内形成废边。
  6. 根据权利要求1至4之任一权利要求所述的注塑模具自切浇口机构，其特征在于所述浇口切刀的造型与注塑产品浇口部位的形状一致，所述浇口切刀的切割刃夹角为45～55°，切割刃厚度为1.0～1.5mm。
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