WO2021248777A1 - 一种注塑模具的自动剪浇口结构 - Google Patents

一种注塑模具的自动剪浇口结构 Download PDF

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Publication number
WO2021248777A1
WO2021248777A1 PCT/CN2020/124021 CN2020124021W WO2021248777A1 WO 2021248777 A1 WO2021248777 A1 WO 2021248777A1 CN 2020124021 W CN2020124021 W CN 2020124021W WO 2021248777 A1 WO2021248777 A1 WO 2021248777A1
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guide
hole
straight
section
mold
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PCT/CN2020/124021
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English (en)
French (fr)
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陈爱平
徐建华
王昱皓
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永高股份有限公司
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Publication of WO2021248777A1 publication Critical patent/WO2021248777A1/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 invention belongs to the technical field of injection molds, and relates to an automatic gate cutting structure of an injection mold.
  • Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding.
  • the gate in the injection mold generally needs to be cut manually, and the company needs to hire a large number of people to cut the gate, which greatly increases the number of company employees and greatly increases the cost of the company.
  • Cipheral Patent Literature discloses the automatic gate cutting structure in the injection mold [application number: 201410476434.9; authorization announcement number: CN104227996B ], it is located in the runner of the rear mold cavity with a top knife that can cut off the gate.
  • the bottom of the top knife is fixedly connected with the upper end of a push rod connected to the rear mold.
  • the knife is pushed out to cut the gate, the lower end of the push rod is provided with a top knife panel located in the mold base, and the top knife panel rests on the top knife bottom plate located in the mold base.
  • the automatic gate cutting structure of this structure uses the elastic force of the elastic rod to push the ejector rod of the front mold against the reset rod.
  • an elastic rod or a spring there are problems such as deformation after a period of use, resulting in insufficient elasticity and no guarantee that the gate will be cut.
  • the elastic rod or spring needs to be repaired or replaced after insufficient elasticity, but the front mold ejector rod, elastic rod, push rod, reset rod, positioning post and spring are all located in the inner and inner positions of the injection mold, which makes the replacement elastic When using rods or springs, many parts need to be disassembled, which leads to troublesome replacement of elastic rods and springs.
  • the purpose of the present invention is to solve the above-mentioned problems in the prior art and propose an automatic gate cutting structure of an injection mold.
  • the technical problem solved is how to ensure that the automatic cutting gate structure can cut the gate and make the automatic cutting gate
  • the mouth structure is convenient for maintenance and replacement.
  • an automatic gate cutting structure of an injection mold the injection mold includes an upper mold and a lower mold, the upper mold and the lower mold can form a molding cavity after being closed, and is characterized in ,
  • the automatic gate cutting structure includes a guide post fixed at the bottom of the upper mold and a guide bar fixed at the top of the lower mold.
  • the inclined guide section of the molding cavity, the guide bar is provided with a sliding block, the sliding block has a guide hole penetrating therethrough, and the guide hole has a straight hole wall matching the straight guide section and an inclined guide section
  • An elastic piece is arranged between the outer end of the cavity and the guide bar.
  • the upper mold and the lower mold are closed together, injected into the molding cavity, and the product is cooled after cooling; when the upper mold and the lower mold are just opened, the straight guide section is inserted in the guide hole, and the straight guide section is opposite to the wall of the straight hole. Fitting, the slider will not move if it is stuck by the straight guide section.
  • the length of the straight guide section needs to ensure that the cutter will not come into contact with the upper mold, and that the cutter will not move and collide with the upper mold; the upper mold and the lower mold Continue to open the mold. At this time, the straight guide section leaves the guide hole, the oblique guide section passes through the guide hole, and the oblique guide section fits the wall of the oblique hole.
  • the oblique guide section drives the slider to move along the guide bar to make the cutter face
  • the product in the molding cavity moves until the cutting knife cuts the gate, and the sliding block and the cutting knife are driven by the guide column to move to cut the gate.
  • the cutting knife has a strong cutting force and good stability to ensure that the gate is cut.
  • the upper mold and lower mold continue to open the mold, the guide post leaves the guide hole, and the guide post no longer contacts the slider. Under the action of the elastic force, the slider is positioned and kept unchanged, which is convenient for the next cycle of the upper and lower molds.
  • the automatic gate cutting structure realizes automatic cutting of the gate through the cooperation of the guide post and the guide hole at the same time as the mold is opened, and the degree of automation is high; the guide post is set at the bottom of the upper mold, the guide bar, the slider, the cutter and the elastic part It is set on the top of the lower mold.
  • the top opening and the bottom opening of the guide hole are both flared, and the upper part of the guide hole close to the hole wall of the molding cavity is a straight hole and the lower part is an oblique hole.
  • Hole wall, the upper part of the hole wall of the guide hole away from the forming cavity is the oblique hole wall and the lower part is the straight hole wall, the oblique hole wall is parallel to the oblique guide section, and the straight hole wall is parallel to the straight guide section.
  • This structure enables the oblique guide section to drive the slider and the cutter to move, and the straight guide section to position the slider and the cutter; the top and bottom openings of the guide hole are flared, as well as the oblique hole wall and the oblique guide section Parallel, the wall of the straight hole is parallel to the straight guide section, so that there will be no jamming problem when the guide column and the sliding block are matched, and the automatic gate cutting structure can cut the gate and improve the stability of the automatic cutting gate structure.
  • the cross section of the guide hole is square, and the cross section of the guide column is square and the corners are rounded.
  • This structure increases the contact area between the guide post and the sliding block, so that the guide post can better drive the sliding block to move, and ensures that the automatic gate cutting structure can cut the gate.
  • the included angle between the straight guide section and the oblique guide section is between 150-170°.
  • the guide bar is protrudingly arranged on the top of the lower mold, and the bottom of the upper mold has a recessed accommodating cavity.
  • the guide bar, the sliding block, the cutter and the elastic member are embedded and arranged in the accommodating cavity.
  • the outer end of the guide bar is located outside the lower mold, and the outer end of the guide bar is suspended.
  • Reasonable use of space, guide bars occupy as little as possible the space of the injection mold, and only need to make small modifications to the molds of the upper and lower molds to reduce costs.
  • the bottom of the guide bar has a protruding step surface, and the step surface abuts against the side of the lower mold. Improve the firmness of the guide bar fixing, thereby improving the stability of the automatic shear gate structure.
  • the guide bar has a guide groove, one end of the guide groove near the molding cavity penetrates, and the other end away from the molding cavity is blocked.
  • the blocks are all arranged in the guide groove, one end of the elastic piece acts on the outer end of the sliding block, and the other end acts on the guide bar.
  • the sliding block can move closer to the molding cavity from one end of the guide groove, and the elastic piece can better position the sliding block.
  • the groove wall at the bottom of the guide groove is recessed to form an embedded groove, and both sides of the slider have embedding portions protruding, and the embedding portion It is embedded in the embedding groove, and the embedding part can slide along the embedding groove.
  • This kind of structure makes the slider move smoothly, thereby improving the stability of the automatic shear gate structure, and ensures that the automatic shear gate structure can cut the gate.
  • the automatic gate cutting structure of the injection mold provided by the present invention has the following advantages:
  • This automatic cutting gate structure realizes automatic cutting of the gate when the mold is opened, and returns the automatic cutting gate structure to the original position when the mold is closed, and realizes the automatic cutting of the gate during the mold opening and closing process, which improves work efficiency. save costs.
  • the guide column of the automatic gate shearing structure is divided into a straight guide section and an oblique guide section.
  • the guide column drives the slider and the cutter to move, and the cutting force of the cutter is strong to ensure Cut off the gate; at the same time, the slider and the cutter are flexibly positioned through the elastic part, so that when the next cycle of mold clamping, there will be no misalignment of the guide posts and guide holes, no failures, and improved stability.
  • the guide posts, guide bars, sliders, cutters and elastic parts of the automatic gate cutting structure are all arranged on the outside of the upper and lower molds, and it is convenient to repair and replace the above-mentioned parts; at the same time, only the current Some molds can be modified in a small range to reduce costs.
  • Figure 1 is a schematic diagram of the operation of the automatic gate cutting structure when opening and closing the mold.
  • Figure 2 is a schematic diagram of the structure of the upper mold and the guide post of the injection mold.
  • Figure 3 is a schematic diagram of the lower mold and part of the automatic gate sprue structure of the injection mold.
  • Figure 4 is a schematic diagram of the guide bar and sliding block of the automatic gate cutting structure.
  • Figure 5 is a state diagram of the automatic shear gate structure when the mold is closed.
  • Figure 6 is a state diagram of the automatic cutting gate structure when the mold is opened.
  • the injection mold includes an upper mold 1, a lower mold 2 and an automatic shear gate structure. After the upper mold 1 and the lower mold 2 are closed, a molding cavity 3 can be formed.
  • the automatic shear gate structure is located on the upper mold 1 and the lower mold. Between mode 2.
  • the automatic gate cutting structure includes a guide column 4, a guide bar 5, a sliding block 6, a cutter 8 and an elastic member 9.
  • the guide post 4 is fixed at the bottom of the upper mold 1.
  • the cross section of the guide post 4 is square and the corners are rounded.
  • the remaining part is the oblique guide section 42 inclined downward toward the molding cavity 3.
  • the angle between the straight guide section 41 and the oblique guide section 42 is 160°.
  • the straight guide section 41 The angle between the inclined guide section 42 and the inclined guide section 42 may be 150° or 170°.
  • the bottom of the upper mold 1 has a receiving cavity 10 recessed.
  • the guide bar 5 is fixed on the top of the lower mold 2 by bolts, and the guide bar 5 is protrudingly arranged on the top of the lower mold 2.
  • the guide The strip 5 is embedded in the receiving cavity 10.
  • the outer end of the guide bar 5 is located outside the lower mold 2 and the outer end of the guide bar 5 is suspended.
  • the bottom of the guide bar 5 has a stepped surface 51 protrudingly provided.
  • the guide bar 5 has a guide groove 52, one end of the guide groove 52 near the molding cavity 3 penetrates, and the other end away from the molding cavity 3 is blocked.
  • the blocks 6 are all arranged in the guide groove 52.
  • the elastic member 9 is a cylindrical spring.
  • One end of the elastic member 9 acts on the outer end of the slider 6, and the other end of the elastic member 9 acts on the guide bar 5. Both sides have a protruding embedding portion 61, the embedding portion 61 is embedded in the embedding groove 53, and a cutter 8 is fixedly connected to the inner end of the slider 6 close to the molding cavity 3.
  • the sliding block 6 has a guiding hole 7 through which the top opening and the bottom opening of the guiding hole 7 are flared.
  • the cross section of the guiding hole 7 is square, and the guiding hole 7 has a matching straight section 41
  • the straight hole wall 71 and the inclined hole wall 72 matching the inclined guide section 42.
  • the upper part of the hole wall of the guide hole 7 close to the molding cavity 3 is the straight hole wall 71 and the lower part is the inclined hole wall 72
  • the guide hole 7 The upper part of the hole wall away from the forming cavity 3 is the inclined hole wall 72 and the lower part is the straight hole wall 71.
  • the inclined hole wall 72 is parallel to the inclined guide section 42.
  • the inclined guide section 42 When the inclined guide section 42 is located in the guide hole 7, the inclined guide section 42 is The hole wall 72 is in clearance fit, and the straight hole wall 71 is parallel to the straight guide section 41. When the straight guide section 41 is located in the guide hole 7, the straight guide section 41 and the straight hole wall 71 are in clearance fit.
  • the upper mold 1 and the lower mold 2 continue to open the molds, as shown in Figure 6, at this time the straight guide section 41 leaves the guide hole 7 and the oblique guide section 42 passes through the guide hole 7, and the oblique guide section 42 is in contact with the oblique hole wall 72 Closely, the inclined guide section 42 moves continuously upward to drive the slider 6 to move along the guide bar 5, and the embedded portion 61 moves along the embedded groove 53, so that the cutter 8 moves toward the product in the molding cavity 3 until the gate is cut.
  • the upper mold 1 and the lower mold 2 continue to open the molds, the guide post 4 leaves the guide hole 7, and the guide post 4 no longer contacts the sliding block 6. Under the action of the elastic force of the elastic member 9, the sliding block 6 is positioned and kept unchanged.
  • the product in the molding cavity 3 is processed again after being blanked, the upper mold 1 and the lower mold 2 are closed, and the inclined guide section 42 is inserted into the guide hole 7 to cooperate with the inclined hole wall 72 to reset the slider 6 and the cutter 8 and then straight
  • the guide section 41 is penetrated to the guide hole 7 and the straight hole wall 71 to cooperate to position the slider 6 and the cutter 8, the upper mold 1 and the lower mold 2 are combined to form a molding cavity 3, and the product is processed again.
  • this article mostly uses the upper mold 1, the lower mold 2, the molding cavity 3, the guide column 4, the straight guide section 41, the oblique guide section 42, the guide bar 5, the step surface 51, the guide groove 52, the embedding groove 53, the sliding Terms such as the block 6, the embedded portion 61, the guide hole 7, the straight hole wall 71, the oblique hole wall 72, the cutter 8, the elastic member 9, the accommodating cavity 10, etc., but the possibility of using other terms is not excluded. These terms are used only to describe and explain the essence of the present invention more conveniently; to interpret them as any additional limitation is contrary to the spirit of the present invention.

Abstract

本发明提供了一种注塑模具的自动剪浇口结构，属于注塑模具技术领域。它解决了现有自动切浇口结构维修更换麻烦的问题。本注塑模具包括上模和下模，上模和下模合模后能形成成型腔，自动剪浇口结构包括固定在上模底部的导向柱和固定在下模顶部的导向条，导向柱靠近上模的一段为直导段，导向柱的其余部分为斜向下朝成型腔倾斜的斜导段，导向条中设有滑块，滑块中具有贯穿的导向孔，导向孔中具有与直导段相匹配的直孔壁和与斜导段相匹配的斜孔壁，斜导段穿过导向孔移动时能带动滑块沿着导向条移动，滑块靠近成型腔的内端固连有切刀，滑块远离成型腔的外端与导向条之间设有弹性件。本自动剪浇口结构具有维修更换方便的优点。

Description

一种注塑模具的自动剪浇口结构 技术领域
本发明属于注塑模具技术领域，涉及一种注塑模具的自动剪浇口结构。
背景技术
注塑是一种工业产品生产造型的方法，产品通常使用橡胶注塑和塑料注塑。现有技术中，注塑模具中的浇口一般需人工剪除，企业需要雇佣大量的人员来剪浇口，这大大增加了公司员工的数量，大大提高了企业成本。
针对以上存在的问题，人们做出各式各样的改进，有的还申请了专利，例如中国专利文献资料公开了注塑模具模内自动切浇口结构[申请号：201410476434.9；授权公告号：CN104227996B]，其位于后模型腔的流道内设有一可将浇口切断的顶刀，该顶刀的底部与一连接在后模上的推杆的上端固定连接，开模时通过推杆将顶刀推出进而切断浇口，推杆的下端部设有一位于模座内的顶刀面板，该顶刀面板搁在一位于模座内的顶刀底板上。
该种结构的自动切浇口结构，是通过弹性棒的弹力将前模顶杆顶出压住复位杆，通过弹簧将推杆顶出后带动顶刀切断浇口，即通过弹簧的弹力切断浇口，而不论是弹性棒或者弹簧，在使用一段时间后存在变形等问题，导致弹力不足，无法保证浇口被剪断。弹性棒或者弹簧弹力不足后需要维修或者更换，但前模顶杆、弹性棒、推杆、复位杆、定位柱和弹簧等均是位于注塑模具比较靠内以及内部的位置，这就使更换弹性棒或者弹簧时，需要拆卸很多零部件，导致弹性棒、弹簧更换麻烦。
发明内容
本发明的目的是针对现有技术中存在的上述问题，提出了一种注塑模具的自动剪浇口结构，解决的技术问题是如何保证自动剪浇口结构能剪断浇口，且使自动剪浇口结构维修更换方便。
本发明的目的可通过下列技术方案来实现：一种注塑模具的自动剪浇口结构，注塑模具包括上模和下模，所述上模和下模合模后能形成成型腔，其特征在于，自动剪浇口结构包括固定在上模底部的导向柱和固定在下模顶部的导向条，所述导向柱靠近上模的一段为直导段，所述导向柱的其余部分为斜向下朝成型腔倾斜的斜导段，所述导向条中设有滑块，所述滑块中具有贯穿的导向孔，所述导向孔中具有与直导段相匹配的直孔壁和与斜导段相匹配的斜孔壁，所述斜导段穿过导向孔移动时能带动滑块沿着导向条移动，所述滑块靠近成型腔的内端固连有切刀，所述滑块远离成型腔的外端与导向条之间设有弹性件。
上模和下模合模，往成型腔中注塑，冷却后产品成型；上模和下模刚开始开模时，此时直导段穿设在导向孔中，直导段与直孔壁相贴合，滑块被直导段卡住是不动的，直导段的长度需要保证切刀不会与上模发生接触，保证切刀不会移动与上模相撞；上模和下模继续开模，此时直导段离开导向孔，斜导段穿设在导向孔中，斜导段与斜孔壁相贴合，斜导段带动滑块沿着导向条移动，使切刀朝成型腔的产品移动直到切刀切断浇口，通过导向柱带动滑块和切刀移动切断浇口，切刀切断的力度大，稳定性好，保证浇口被切断。上模和下模 继续开模，导向柱离开导向孔，导向柱不再与滑块接触，在弹性件弹力的作用下，滑块定位并保持位置不变，便于下个循环上模和下模合模时，导向柱和导向孔不会存在错位的问题，导向柱能够精准的穿设到导向孔中，不会存在故障，提高加工稳定性。取下产品，再次加工时，上模和下模合模，斜导段穿设到导向孔中配合斜孔壁使滑块和切刀复位，直到直导段穿设到导向孔中和直孔壁配合使滑块和切刀定位，上模和下模合模形成成型腔，再次加工产品。本自动剪浇口结构在开模的同时通过导向柱和导向孔的配合实现浇口的自动切断，自动化程度高；导向柱设置在上模的底部，导向条、滑块、切刀和弹性件是设置在下模的顶部，只要上模和下模开模，即可对上述的零部件进行维修更换，维修更换方便。
在上述的一种注塑模具的自动剪浇口结构中，所述导向孔的顶部开口和底部开口均呈扩口状，所述导向孔靠近成型腔的孔壁的上部为直孔壁下部为斜孔壁，所述导向孔远离成型腔的孔壁的上部为斜孔壁下部为直孔壁，所述斜孔壁与斜导段相平行，所述直孔壁与直导段相平行。该种结构使斜导段能带动滑块和切刀移动，使直导段能使滑块和切刀定位；导向孔顶部开口和底部开口均呈扩口状，以及斜孔壁与斜导段相平行，直孔壁与直导段相平行，使导向柱和滑块配合时不会存在卡住的问题，保证自动剪浇口结构能剪断浇口，提高自动剪浇口结构的稳定性。
在上述的一种注塑模具的自动剪浇口结构中，当所述斜导段位于导向孔中时所述斜导段与斜孔壁间隙配合，当所述直导段位于导向孔中时所述直导段与直孔壁间隙配合。该种结构，使导向柱和滑块配合时不会存在卡住的问题，保证自动剪浇口结构能剪断浇口，提高自动剪浇口结构的稳定性。
在上述的一种注塑模具的自动剪浇口结构中，沿水平方向，所述导向孔的截面呈方形，所述导向柱的截面呈方形且边角处倒圆处理。该种结构，提高导向柱和滑块的接触面积，使导向柱能够更好的带动滑块移动，保证自动剪浇口结构能剪断浇口。
在上述的一种注塑模具的自动剪浇口结构中，所述直导段和斜导段之间的夹角在150-170°之间。该种结构，使直导段和斜导段的弯曲不会过大，使导向柱和滑块在配合时，不会卡住，提高滑块移动的稳定性，从而保证自动剪浇口结构能剪断浇口。
在上述的一种注塑模具的自动剪浇口结构中，所述导向条凸出设置在下模的顶部，所述上模的底部具有凹入设置的容纳腔，当上模和下模合模形成所述成型腔时，所述导向条、滑块、切刀和弹性件嵌入设置在容纳腔中。该种结构，使导向柱、导向条、滑块、切刀和弹性件均是设置在外部的，维护更换方便；同时只需要修改一点模具的结构即可实现自动剪浇口结构的安装，成本低。
在上述的一种注塑模具的自动剪浇口结构中，所述导向条的外端位于下模外，所述导向条的外端悬空设置。合理利用空间，导向条尽可能小的占据注塑模具的空间，只需要对上模和下模的模具做出小幅度的修改即可，降低成本。
在上述的一种注塑模具的自动剪浇口结构中，所述导向条的底部具有凸出设置的台阶面，所述台阶面抵靠在下模的侧部。提高导向条固定的牢固程度，从而提高自动剪浇口结构的稳定性。
在上述的一种注塑模具的自动剪浇口结构中，所述导向条中具有导向槽，所述导向槽靠近成型腔的一端贯穿，远离成型腔的另一端封堵，所述弹性件和滑块均设置在导向槽中，所述弹性件的一端作用在滑块的外端上，另一端作用在导向条上。滑块可以从导向槽 的一端向成型腔移动靠近，弹性件可以更好的对滑块进行定位。
在上述的一种注塑模具的自动剪浇口结构中，所述导向槽底部的槽壁凹进设置形成嵌入槽，所述滑块的两侧均具有凸出设置的嵌入部，所述嵌入部嵌入在嵌入槽中，且所述嵌入部能沿着嵌入槽滑动。该种结构，使滑块移动平稳，从而提高自动剪浇口结构的稳定性，保证自动剪浇口结构能剪断浇口。
与现有技术相比，本发明提供的注塑模具的自动剪浇口结构具有以下优点：
1、本自动剪浇口结构在开模时实现自动剪浇口，在合模时将自动剪浇口结构回复到原位，在开合模的过程中实现自动化剪浇口，提高工作效率，节约成本。
2、本自动剪浇口结构导向柱分成直导段和斜导段，配合导向孔的直孔壁和斜孔壁，实现导向柱带动滑块和切刀移动，切刀的切割力强，保证切断浇口；同时通过弹性件对滑块和切刀进行柔性定位，使下个循环合模时，导向柱和导向孔不会存在错位的问题，不会存在故障，提高稳定性。
3、本自动剪浇口结构的导向柱、导向条、滑块、切刀和弹性件均是设置在上模和下模的外部，对上述的零部件进行维修更换方便；同时只需要对现有的模具进行小范围的改动即可，降低成本。
附图说明
图1是本自动剪浇口结构开合模时的动作原理图。
图2是本注塑模具的上模和导向柱的结构示意图。
图3是本注塑模具的下模和部分自动剪浇口结构的示意图。
图4是本自动剪浇口结构的导向条和滑块等结构示意图。
图5是本自动剪浇口结构合模时的状态图。
图6是本自动剪浇口结构开模时的状态图。
图中，1、上模；2、下模；3、成型腔；4、导向柱；41、直导段；42、斜导段；5、导向条；51、台阶面；52、导向槽；53、嵌入槽；6、滑块；61、嵌入部；7、导向孔；71、直孔壁；72、斜孔壁；8、切刀；9、弹性件；10、容纳腔。
具体实施方式
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
如图1所示，注塑模具包括上模1、下模2和自动剪浇口结构，上模1和下模2合模后能形成成型腔3，自动剪浇口结构位于上模1和下模2之间。自动剪浇口结构包括导向柱4、导向条5、滑块6、切刀8和弹性件9。
如图2所示，导向柱4固定在上模1的底部，导向柱4的截面呈方形且边角处倒圆处理，导向柱4靠近上模1的一段为直导段41，导向柱4的其余部分为斜向下朝成型腔3倾斜的斜导段42，本实施例中，直导段41和斜导段42之间的夹角为160°，在实际生产中，直导段41和斜导段42之间的夹角可以为150°或者170°。上模1的底部具有凹入设置的容纳腔10。
如图3、图4所示，导向条5通过螺栓固定在下模2的顶部，导向条5凸出设置在下模2的顶部，当上模1和下模2合模形成成型腔3时，导向条5嵌入设置在容纳腔10中。导向条5的 外端位于下模2外，导向条5的外端悬空设置，导向条5的底部具有凸出设置的台阶面51，台阶面51抵靠在下模2的侧部。导向条5中具有导向槽52，导向槽52靠近成型腔3的一端贯穿，远离成型腔3的另一端封堵，导向槽52底部的槽壁凹进设置形成嵌入槽53，弹性件9和滑块6均设置在导向槽52中，弹性件9为圆柱弹簧，弹性件9的一端作用在滑块6的外端上，弹性件9的另一端作用在导向条5上，滑块6的两侧均具有凸出设置的嵌入部61，嵌入部61嵌入在嵌入槽53中，滑块6靠近成型腔3的内端固连有切刀8。
滑块6中具有贯穿的导向孔7，导向孔7的顶部开口和底部开口均呈扩口状，沿水平方向，导向孔7的截面呈方形，导向孔7中具有与直导段41相匹配的直孔壁71和与斜导段42相匹配的斜孔壁72，具体来说，导向孔7靠近成型腔3的孔壁的上部为直孔壁71下部为斜孔壁72，导向孔7远离成型腔3的孔壁的上部为斜孔壁72下部为直孔壁71，斜孔壁72与斜导段42相平行，当斜导段42位于导向孔7中时斜导段42与斜孔壁72间隙配合，直孔壁71与直导段41相平行，当直导段41位于导向孔7中时直导段41与直孔壁71间隙配合。
如图5所示，上模1和下模2刚开始开模时，此时直导段41穿设在导向孔7中，直导段41与直孔壁71相配合，滑块6被直导段41卡住不动的，导向条5、滑块6、切刀8和弹性件9整体嵌入在容纳腔10中。上模1和下模2继续开模，如图6所示，此时直导段41离开导向孔7斜导段42穿设在导向孔7中，斜导段42与斜孔壁72相贴合，斜导段42相对持续上移带动滑块6沿着导向条5移动，嵌入部61沿着嵌入槽53移动，使切刀8朝成型腔3的产品移动直到切断浇口。上模1和下模2继续开模，导向柱4离开导向孔7，导向柱4不再与滑块6接触，在弹性件9弹力的作用下，滑块6定位并保持位置不变。成型腔3中的产品下料后再次加工，上模1和下模2合模，斜导段42穿设到导向孔7中配合斜孔壁72使滑块6和切刀8复位，然后直导段41穿设到导向孔7和直孔壁71配合使滑块6和切刀8定位，上模1和下模2合模形成成型腔3，再次加工产品。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。
尽管本文较多地使用了上模1、下模2、成型腔3、导向柱4、直导段41、斜导段42、导向条5、台阶面51、导向槽52、嵌入槽53、滑块6、嵌入部61、导向孔7、直孔壁71、斜孔壁72、切刀8、弹性件9、容纳腔10等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本发明的本质；把它们解释成任何一种附加的限制都是与本发明精神相违背的。

Claims (10)

  1. 一种注塑模具的自动剪浇口结构，注塑模具包括上模(1)和下模(2)，所述上模(1)和下模(2)合模后能形成成型腔(3)，其特征在于，自动剪浇口结构包括固定在上模(1)底部的导向柱(4)和固定在下模(2)顶部的导向条(5)，所述导向柱(4)靠近上模(1)的一段为直导段(41)，所述导向柱(4)的其余部分为斜向下朝成型腔(3)倾斜的斜导段(42)，所述导向条(5)中设有滑块(6)，所述滑块(6)中具有贯穿的导向孔(7)，所述导向孔(7)中具有与直导段(41)相匹配的直孔壁(71)和与斜导段(42)相匹配的斜孔壁(72)，所述斜导段(42)穿过导向孔(7)移动时能带动滑块(6)沿着导向条(5)移动，所述滑块(6)靠近成型腔(3)的内端固连有切刀(8)，所述滑块(6)远离成型腔(3)的外端与导向条(5)之间设有弹性件(9)。
  2. 根据权利要求1所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向孔(7)的顶部开口和底部开口均呈扩口状，所述导向孔(7)靠近成型腔(3)的孔壁的上部为直孔壁(71)下部为斜孔壁(72)，所述导向孔(7)远离成型腔(3)的孔壁的上部为斜孔壁(72)下部为直孔壁(71)，所述斜孔壁(72)与斜导段(42)相平行，所述直孔壁(71)与直导段(41)相平行。
  3. 根据权利要求2所述的一种注塑模具的自动剪浇口结构，其特征在于，当所述斜导段(42)位于导向孔(7)中时所述斜导段(42)与斜孔壁(72)间隙配合，当所述直导段(41)位于导向孔(7)中时所述直导段(41)与直孔壁(71)间隙配合。
  4. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，沿水平方向，所述导向孔(7)的截面呈方形，所述导向柱(4)的截面呈方形且边角处倒圆处理。
  5. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，所述直导段(41)和斜导段(42)之间的夹角在150-170°之间。
  6. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向条(5)凸出设置在下模(2)的顶部，所述上模(1)的底部具有凹入设置的容纳腔(10)，当上模(1)和下模(2)合模形成所述成型腔(3)时，所述导向条(5)、滑块(6)、切刀(8)和弹性件(9)嵌入设置在容纳腔(10)中。
  7. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向条(5)的外端位于下模(2)外，所述导向条(5)的外端悬空设置。
  8. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向条(5)的底部具有凸出设置的台阶面(51)，所述台阶面(51)抵靠在下模(2)的侧部。
  9. 根据权利要求1或2或3所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向条(5)中具有导向槽(52)，所述导向槽(52)靠近成型腔(3)的一端贯穿，远离成型腔(3)的另一端封堵，所述弹性件(9)和滑块(6)均设置在导向槽(52)中，所述弹性件(9)的一端作用在滑块(6)的外端上，另一端作用在导向条(5)上。
  10. 根据权利要求9所述的一种注塑模具的自动剪浇口结构，其特征在于，所述导向槽(52)底部的槽壁凹进设置形成嵌入槽(53)，所述滑块(6)的两侧均具有凸出设置的嵌入部(61)，所述嵌入部(61)嵌入在嵌入槽(53)中，且所述嵌入部(61)能沿着嵌入槽(53)滑动。
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