WO2022227542A1 - 一种汽车保险杠注塑模具内部双弹针脱倒扣机构 - Google Patents

一种汽车保险杠注塑模具内部双弹针脱倒扣机构 Download PDF

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Publication number
WO2022227542A1
WO2022227542A1 PCT/CN2021/133349 CN2021133349W WO2022227542A1 WO 2022227542 A1 WO2022227542 A1 WO 2022227542A1 CN 2021133349 W CN2021133349 W CN 2021133349W WO 2022227542 A1 WO2022227542 A1 WO 2022227542A1
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Prior art keywords
groove
insert
needle
elastic
double
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PCT/CN2021/133349
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English (en)
French (fr)
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梁正华
王华良
林连明
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浙江凯华模具有限公司
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Publication of WO2022227542A1 publication Critical patent/WO2022227542A1/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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4471—Removing or ejecting moulded articles for undercut articles using flexible or pivotable undercut forming elements
    • 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

Definitions

  • the invention relates to the technical field of mold manufacturing, in particular to a double-elastic needle tripping mechanism inside an injection mold of an automobile bumper.
  • Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding.
  • the advantages of the injection molding method are that the production speed is fast, the efficiency is high, the operation can be automated, there are many varieties of colors, the shape can be from simple to complex, the size can be from large to small, and the size of the product is accurate, the product is easy to replace, and it can be formed into complex shapes. Parts, injection molding is suitable for mass production and complex shape products and other molding processing fields.
  • Chinese Patent Literature (Bulletin No.: CN203876172U) discloses "a tripping assembly and a mold containing the tripping assembly", a mold including the tripping assembly, and the tripping assembly includes a straight top and a slanted top.
  • the top block, the inclined top block is arranged through the inclined passage on the straight top, and the inclined top block is provided with a hook head hooked with the inverted buckle of the model product and a guide sliding through the outer wall of the straight top and limited by the mold core.
  • the guide block is fixed on at least one side of the inclined top block, and the outer wall of the straight top is provided with a limit groove for accommodating and limiting the guide block, and the mold core is opposite to the guide block in the axial direction of the limit groove.
  • the above technical solution provides space for the guide block that has been released from the limit of the mold core through the limit groove, so as to achieve the effect of tripping and undercutting.
  • the distance between the straight top and the inclined top block is very narrow, and the running space is insufficient, so the inclined top action cannot be completed.
  • the present invention provides an upside down release with double elastic pins inside the injection mold of an automobile bumper.
  • the product is molded through the elastic tripping mechanism provided in the core, and the tripping can be completed only by shrinking the elastic needle when the mold is opened.
  • the structure is extraordinar and the operation is convenient.
  • An internal double-elastic needle tripping mechanism for an injection mold of an automobile bumper comprising an elastic tripping mechanism arranged in the core of the mold and a locking block disposed inside the cavity; the locking block and the elastic tripping
  • the buckle mechanism is movably inserted and connected; the elastic release and inverted buckle mechanism includes an insert block assembly and a double elastic needle arranged inside the insert block assembly.
  • a locking groove is arranged inside the insert block assembly, and the locking block It is closed in the locking groove and abuts against the double elastic needle.
  • the double-bullet needle tripping mechanism inside the injection mold of the automobile bumper is provided by an elastic tripping and tripping mechanism in the core; the elastic tripping and tripping mechanism cooperates with the locking block, and drives the double-elastic needle and the inner ring in the cavity through elastic force.
  • the formed product is upside down; easy to operate.
  • the elastic snap-off mechanism includes an insert assembly that is snapped and arranged in the cavity and a double elastic needle that is arranged inside the insert assembly.
  • the insert assembly is designed according to the structure of the molded product.
  • the double-elastic needle inside the insert assembly is set according to the position of the installation hole of the molded product to ensure that the double-elastic needle can be inserted into the installation hole after the product is formed in the mold-closed state, and the tail end of the double-elastic needle in the mold-closed state Abutting with the locking blocks respectively, the head end of the double elastic needle protrudes from the outside of the insert block assembly and is arranged at the position of the installation hole after the product is formed, and the head end of the double elastic needle abuts in the installation hole of the formed product after the product is formed.
  • the insert assembly includes a left insert and a right insert that are spliced and connected, the left insert is provided with a left groove on the side close to the right insert, and the right insert is close to the left insert A right groove is provided, and the left groove and the right groove are combined to form a locking groove.
  • the left insert and the left and right grooves on the right insert are combined to form a locking groove.
  • the locking groove is a wedge-shaped groove with an upward opening
  • the insertion section of the locking block and the locking groove is a wedge-shaped structure
  • a gap is provided between the locking block and the upper groove wall of the left groove.
  • the wedge-shaped locking block is matched with the wedge-shaped locking groove, and a gap is set between the locking block and the upper groove wall of the left groove, which can not only ensure the smooth movement of the locking block when it is inserted or disengaged, but also avoid the side wall of the locking block and the elastic
  • the end of the needle forms a hard contact collision, which effectively improves the working stability of the locking block and the insert assembly.
  • the double-bounce needle includes a left-direction spring needle arranged inside the left insert and a right-direction spring needle arranged inside the right insert, and the left-direction spring needle and the right-direction spring needle are dislocated up and down and arranged in parallel,
  • the left-direction elastic pin and the right-direction elastic pin are respectively telescopically extended to the outside of the left insert and the right insert.
  • the left-direction elastic pin and the right-direction elastic pin are used to form the product mounting hole during product molding and respectively abut inside the molded product mounting hole after the product is molded, so as to ensure the smooth internal molding of the product during the injection molding process, and when the mold is opened , the left and right spring needles need to be retracted.
  • the axes of the left and right spring needles are not set at the same On the axis, the up and down parallel dislocation setting is implemented, which can make the double elastic needle quickly separate from the molded product to complete the upside down buckle, with stable support and good response.
  • the left-direction spring needle and the right-direction spring needle are separately arranged on both sides of the locking groove and are arranged in parallel, which can ensure the fastest response to retract and release when the locking block is disengaged.
  • a left accommodating groove is provided inside the left insert along an axis perpendicular to the locking groove
  • a right accommodating groove is arranged inside the right insert along an axis perpendicular to the locking groove.
  • the right accommodating groove and the left accommodating groove are arranged in parallel with up and down dislocation, the left accommodating groove and the right accommodating groove are assembled to form the accommodating groove, the left-direction elastic needle is arranged inside the left accommodating groove, and the right-direction spring needle is arranged inside the right accommodating groove.
  • the double elastic needles respectively comprise a base body and a needle body arranged coaxially, the outer diameter of the needle is smaller than the outer diameter of the base body, an elastic member is sleeved on the needle body, and the tail end of the elastic member abuts the base body.
  • the front end surface, the rear end surface of the base body is an inclined surface and abuts against the locking block.
  • the elastic piece is sleeved on the needle body.
  • a through groove is provided on the base body, and a sub-insert is arranged through the through-slot, the sub-insert is longitudinally inserted into the left insert, and the sub-insert is longitudinally inserted into the insert assembly and can be Slide left and right along the insert assembly with the double spring pin.
  • the sub-inserts are longitudinally inserted into the through grooves of the base body to limit and prevent rotation.
  • the sub-inserts can not only solve the problem that the base body falls into the locking groove when the locking block is disengaged It cannot be reset, which will cause the problem of re-clamping failure. At the same time, it can prevent the base body from rotating and wearing in the accommodating groove due to frequent actions, and even the problem that the ejection or retraction is not in place due to the gap, and the failure of molding or demolding can be avoided.
  • an assembly groove is provided on the core, and the elastic tripping mechanism is detachably installed in the assembly groove.
  • the elastic snap-fit is arranged in the assembly groove of the core.
  • the injection mold in this application includes a mold body, the mold body includes an upper cladding plate and a lower cladding plate, the cavity is arranged below the upper cladding plate, the lower cladding plate is provided with a die foot, and the die foot is provided with a top plate group,
  • the top plate group includes an upper top plate and a lower top plate, the upper top plate and the lower top plate are stacked and arranged, and the core is arranged on the top plate group.
  • the upper top plate and the lower top plate are combined to form two points to fix and strengthen the ejector rod, so as to ensure the stability of the ejector rod.
  • the present invention has the following beneficial effects: (1) product molding is carried out by means of the elastic tripping mechanism provided in the core, and the tripping can be completed only by shrinking the elastic needle when the mold is opened.
  • the structure is astonishing and the operation is convenient.
  • (2) The double elastic needles inside the insert assembly are set according to the mounting holes of the molded product, so as to ensure that the elastic needles are inserted and the position of the installation holes in the mold clamping state to complete the injection molding. When the mold is opened, the double elastic needles shrink and the installation holes remain.
  • the wedge-shaped locking block cooperates with the wedge-shaped locking groove, which can not only ensure the smooth movement of the locking block when it is inserted or disengaged, but also avoid the side wall of the locking block and the tail end of the double spring needle. Form a hard contact collision, which effectively improves the working stability of the locking block and the insert assembly;
  • the sub-insert can not only solve the problem that the base body falls into the locking groove and cannot be reset when the locking block is disengaged, resulting in the failure of re-clamping At the same time, it can avoid the rotation and wear of the base body in the accommodating groove due to frequent movements, and even the problem that the ejection or retraction is not in place due to the gap, which can effectively avoid the failure of molding or demolding.
  • FIG. 1 is a schematic structural diagram of the present invention in a clamping state
  • Fig. 2 is the structural representation of the present invention's mold opening state
  • Fig. 3 is the structural schematic diagram after demoulding of the present invention.
  • Fig. 4 is the sectional view of the elastic tripping upside down mechanism in the embodiment
  • Figure 5 is a perspective view of the elastic tripping mechanism in the embodiment
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • a double-elastic needle snap-off mechanism inside the injection mold of an automobile bumper includes a mold body, and the mold body includes an upper cladding plate 1 and a lower cladding plate 2, and the lower part of the upper cladding plate A cavity 4 is provided, a die foot 7 is arranged above the lower compound plate, a top plate group is arranged on the die foot, and a core 5 is arranged on the top plate group; wherein, an elastic tripping mechanism 3 is arranged in the core 5; The elastic tripping and inversion mechanism drives the molded product 10 in the cavity to trip the inversion through elastic force; wherein, as shown in FIG.
  • the elastic snap-off mechanism includes an insert assembly 9 that is snap-fitted and installed in the core 5.
  • the insert assembly 9 is designed according to the structure of the molded product. For the installation hole setting of the product to be molded, ensure that the injection molding is completed when the double elastic pin is inserted and the installation hole position in the mold clamping state.
  • the core 5 is provided with an assembly groove 51, and the insert assembly 9 is installed in the assembly groove 51.
  • the insert assembly 9 includes a left insert 91 and a right insert 92 that are spliced and connected.
  • the side of the left insert 91 close to the right insert 92 is provided with a left groove 911
  • the side of the right insert 92 close to the left insert 91 is provided with a right groove 921
  • the right groove 921 is assembled to form the locking groove 11
  • the cavity 4 is provided with a locking block 41 corresponding to the locking groove 11
  • the locking block is inserted and connected to the locking groove 11 .
  • the locking block is a wedge-shaped structure, including a connecting section and a wedge-shaped section, wherein the length of the slope of the wedge-shaped section toward the right insert is greater than the length of the slope toward the left insert, and the locking groove is a wedge-shaped groove with an upward opening.
  • the insert assembly is arranged in the assembling groove 51, the left insert 91 and the left and right grooves on the right insert 92 are combined to form a locking groove, and the inner edges of the left insert and the right insert are perpendicular to the locking groove.
  • a left accommodating groove and a right accommodating groove are respectively provided in the axial direction, and the axes of the left accommodating groove and the right accommodating groove are arranged in dislocation.
  • the left and right accommodating grooves form a accommodating groove 16 arranged laterally on the locking groove.
  • the double elastic pins include a left elastic pin 31 arranged on the left insert and a right elastic pin 32 arranged on the right insert.
  • the tails of the left and right elastic pins are arranged as inclined surface structures matched with the wedge-shaped structure of the locking block. The outside of the insert and the right insert.
  • the wedge-shaped locking block cooperates with the wedge-shaped locking groove, which can ensure that the locking block moves smoothly when it is inserted or disengaged. It can also avoid the hard contact collision between the side wall of the locking block and the tail end of the bullet needle, and effectively improve the working stability of the locking block and the insert assembly.
  • the structure of the left elastic pin and the right elastic pin are the same.
  • the left-direction spring needle and the right-direction spring needle respectively include a base body 12 and a needle body 13 arranged coaxially, the outer diameter of the needle is smaller than the outer diameter of the base, and the needle body is sleeved and provided There is an elastic member 14, the tail end of the elastic member abuts against the front end surface of the base body, and the rear end surface of the base body can abut against the locking block.
  • the left-direction spring needle and the right-direction spring needle are respectively abutted on the inner two sides of the inverted part of the undercut product to ensure smooth internal molding of the product during the injection molding process, and when the left-direction spring needle and the right-direction spring needle retract , It can quickly disengage the molded product to complete the upside down buckle, and the support is stable and responsive.
  • the elastic piece is sleeved on the needle body. When the locking block is inserted, the elastic needle moves in the accommodating groove, the base body compresses the elastic piece, and the needle body extends out of the insert and abuts the mounting hole position of the molded product to complete the support.
  • the elastic member 14 adopts a spring.
  • through grooves 15 are respectively provided on the bases 12 of the left elastic needle and the right elastic needle, and the axis of the through groove is arranged parallel to the axis of the locking block, and the corresponding left insert and right insert are respectively provided with
  • the sliding jacks communicate with the through grooves.
  • the through grooves and the sliding jacks form an L-shaped groove structure.
  • the through grooves 15 of the left elastic needle and the right elastic needle are respectively provided with sub-inserts 33, which are respectively longitudinally inserted. in the sockets of the left and right inserts.
  • the sub-inserts are longitudinally inserted into the through grooves of the base body to limit and prevent rotation.
  • the sub-inserts slide with the base body, which can not only solve the problem of the base body falling when the locking block is disengaged.
  • the locking groove it cannot be reset, resulting in the failure of re-clamping.
  • it can avoid the wear of the base body due to frequent movements in the receiving groove, and even the problem of ejection or retraction due to gaps. Die failed.
  • the left-direction spring needle is arranged in parallel with the right-direction spring needle.
  • the left-direction spring needle and the right-direction spring needle are respectively arranged on both sides of the locking groove and are arranged in parallel at the upper and lower positions, which can ensure the quickest response to retract and release the buckle when the locking block is disengaged.
  • the elastic tripping mechanism is detachably connected in the core.
  • the elastic snap-off is assembled in the assembly groove 51 of the core 5.
  • the top panel group includes an upper top panel 6 and a lower top panel 8, and the upper top panel and the lower top panel are stacked.
  • the combination of the upper top plate and the lower top plate forms two points to fix and strengthen the ejector rod 81 to ensure the stability of the ejector rod.
  • the insert assembly 9 is first assembled: the elastic member 14 is sleeved on the needle body 13 to obtain the left elastic needle 31 , and then the left elastic needle 31 is assembled from the left
  • the groove 911 is inserted into the accommodating groove of the left insert 91, and then the sub-insert 33 is inserted into the through slot 15 of the base body 12 from below the left insert 91 to limit the position of the left elastic pin 31; then assemble as described above
  • the right elastic pin 32 and the sub-insert 33 in the right insert 91; then the left insert and the right insert are assembled and connected to form an insert assembly.
  • the insert assembly is inserted into the assembly groove 51 to complete the elastic fall. Installation of the buckle mechanism.
  • the locking block 41 on the cavity 4 is inserted into the locking groove 11 formed by the combination of the left groove and the right groove, and the two side walls of the locking block squeeze the left and right elastic pins.
  • the needle bodies of the two spring needles extend out of the insert assembly and abut against the position where the mounting holes are located after the product is formed.
  • the left and right limit force of the locking block on the left and right spring needles disappears, and the left and right spring needles retract toward the center of the locking groove, which is the same as the one on the product.
  • the mounting hole is disengaged, the spring pin is retracted into the insert assembly 9, the molded product is de-buckled, and then the product is ejected upward through the ejector rod 81 to complete the demoulding.
  • the interior of the injection-molded part can be molded by designing an insert assembly that matches the size of the core.

Abstract

一种汽车保险杠注塑模具内部双弹针脱倒扣机构，包括设置在模具型芯(5)内的弹性脱倒扣机构(3)和设置在型腔(4)内部的锁紧块(41)；锁紧块(41)与弹性脱倒扣机构(3)活动插合连接；弹性脱倒扣机构(3)包括镶块组件(9)和设置于镶块组件(9)内部的左向弹针(31)和右向弹针(32)，镶块组件(9)内部设置有锁紧槽(11)，锁紧块(41)插合在锁紧槽(11)内部并且与左向弹针(31)和右向弹针(32)相互抵接。通过在型芯(5)内设置的弹性脱倒扣机构(3)进行产品塑型，在开模时仅通过左向弹针(31)和右向弹针(32)收缩即可完成脱倒扣，结构精巧，操作便捷。

Description

一种汽车保险杠注塑模具内部双弹针脱倒扣机构 技术领域
本发明涉及模具制造技术领域，尤其是涉及一种汽车保险杠注塑模具内部双弹针脱倒扣机构。
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。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。
其中，在塑料制品的注塑成型中，一些塑料制品结构的内部通常设置有环型倒扣或内凹，塑料制件在成型后无法通过常规的顶出机构从模具型芯上取出来。需要专门的设计加以解决。但一些塑料件由于装配的需要通常会把多个安装孔做的很近，且附近有设有台阶导致斜顶或滑块干涉没有足够的运行空间，因此按传统的设计直接设计斜顶或滑块无法实现顶出。
例如中国专利文献(公告号：CN203876172U)公开了“一种脱倒扣组件及包含该脱倒扣组件的模具”，包含该脱倒扣组件的模具，所述脱倒扣组件包括直顶和斜顶块，斜顶块贯穿设置于直顶上的斜行道内，斜顶块上设置有与模型产品的倒扣相勾持的钩头部和贯穿直顶外壁并受模芯限位的导滑块，导滑块固定设置于斜顶块的至少一面上，直顶外壁上设置有用于容纳并限位导滑块的限位槽，模芯对所述导滑块在限位槽的轴线方向的限位作用消失时，导滑块沿所述限位槽滑动。
上述技术方案通过限位槽对已脱离模芯限位的导滑块提供让位空间，从而实现脱倒扣效果，但这种方案的脱倒扣效果受到限位槽的尺寸限制，当模具尺寸较小时，所述直顶和斜顶块间距很窄，运行空间不足，因此无法完成斜顶动作。
发明内容
针对背景技术中提到的现有尺寸较小的注塑模具顶出机构运行空间受限，导致无法顺利脱倒扣的问题，本发明提供了一种汽车保险杠注塑模具内部双弹针脱倒扣机构，通过在型芯内设置的弹性脱倒扣机构进行产品塑型，在开模时仅通过弹针收缩即可完成脱倒扣，结构精巧，操作便捷。
为了实现上述目的，本发明采用以下技术方案：
一种汽车保险杠注塑模具内部双弹针脱倒扣机构，包括设置在模具型芯内的弹性脱倒扣机构和设置在型腔内部的锁紧块；所述的锁紧块与弹性脱倒扣机构活动插合连接；所述弹性 脱倒扣机构包括镶块组件和设置于镶块组件内部的双弹针，所述的镶块组件内部设置有锁紧槽，所述的锁紧块插合在锁紧槽内部并且与双弹针相互抵接。该汽车保险杠注塑模具内部双弹针脱倒扣机构，通过在型芯内设置弹性脱倒扣机构；弹性脱倒扣机构与锁紧块配合，并通过弹力驱动双弹针与型腔内的成型产品脱倒扣；操作便捷。其中，所述弹性脱倒扣机构包括卡合安置于型腔内的镶块组件和设置于镶块组件内部的双弹针，所述镶块组件根据成型产品的结构进行设计，具体地说，所述镶块组件内部的双弹针对应成型产品的安装孔位置设置，确保合模状态下双弹针在产品成型后能够插接于安装孔，在合模状态下所述双弹针尾端分别与锁紧块抵接，双弹针的头端伸出镶块组件外部设置在产品成型后的安装孔位置，在产品成型后双弹针的头端抵接在成型产品的安装孔内。开模时，型芯带动锁紧块与弹性脱倒扣机构分离，双弹针向镶块组件内部收缩，双弹针与安装孔脱离，以此顺利实现产品脱倒扣。结构精巧，操作便捷。
作为优选，所述镶块组件包括拼合连接的左镶块和右镶块，所述左镶块靠近右镶块的一侧设置有左凹槽，所述右镶块靠近左镶块的一侧设置有右凹槽，所述左凹槽与右凹槽拼合形成锁紧槽。左镶块与右镶块上的左凹槽和右凹槽拼合形成锁紧槽，当锁紧块插在锁紧槽内时，锁紧块侧壁抵合双弹针尾部，确保双弹针维持顶出状态对产品进行塑型。
进一步的，所述锁紧槽为开口向上的楔形槽，所述锁紧块与锁紧槽插合段为楔形结构，锁紧块与左凹槽上部槽壁之间设置有间隙。楔形锁紧块配合楔形锁紧槽，并且在锁紧块与左凹槽上部槽壁之产设置间隙，既可确保锁紧块插入或脱离时动作顺畅，亦可避免锁紧块侧壁与弹针尾端形成硬接触碰撞，有效提升锁紧块及镶块组件的工作稳定性。
进一步的，所述双弹针包括设置于左镶块内部的左向弹针和设置于右镶块内部的右向弹针，所述左向弹针与右向弹针上下错位且平行设置，所述左向弹针与右向弹针分别伸缩式延伸到左镶块和右镶块的外部。左向弹针与右向弹针用于在产品成型时形成产品安装孔并且在产品成型后分别抵接在成型产品安装孔内部，确保注塑成型过程中产品内部塑型顺利，而当开模时，需要左向弹针和右向弹针回缩，为了实现锁紧块与锁紧槽的快速分离以及双弹针的快速回缩，左向弹针和右向弹针的轴线不设置在同一轴线上，实行上下平行错位设置，能够使双弹针快速脱离成型产品完成脱倒扣，支撑稳定且响应性好。左向弹针与右向弹针分设于锁紧槽两侧且平行设置，能够保证在锁紧块脱离时最快响应进行回缩脱倒扣。
进一步的，所述的左镶块内部沿垂直于锁紧槽的轴线方向设置有左容纳槽，所述的右镶块内部沿垂直于锁紧槽的轴线方向设置有右容纳槽，所述的右容纳槽与左容纳槽上下错位平行设置，左容纳槽和右容纳槽拼合形成容纳槽，左向弹针设置在左容纳槽内部，右向弹针设 置在右容纳槽内部。
进一步的，所述双弹针分别包括同轴设置的基体和针体，所述针体外径小于基体外径，所述针体上套接设置有弹性件，所述弹性件尾端抵接基体前端面，所述基体后端面为斜面并抵接锁紧块。所述弹性件套设在针体上，当锁紧块插入时，弹针在容纳槽内动作，基体压缩弹性件，针体伸出镶块并抵接成型产品的安装孔位置，完成支撑。而当锁紧块脱离时，弹性件释放弹力，基体带动针体反向滑动，针体回缩至镶块内部，产品脱倒扣完成，可被顺利顶出。
作为优选，所述基体上设置有通槽，所述通槽内贯穿设置有子镶块，所述子镶块纵向插合左镶块，所述子镶块纵向插合于镶块组件并可随双弹针一起沿镶块组件左右滑动。所述子镶块纵向插合基体的通槽，起到限位和止转作用，当基体在容纳槽内滑动时，子镶块既能解决在锁紧块脱离时基体落入锁紧槽中无法复位进而造成再次合模失败的问题，同时又能够避免基体因频繁动作而在容纳槽内转动磨损，甚至产生间隙造成顶出或回缩不到位的问题，避免导致成型或脱模失败。
作为优选，所述型芯上设置有装配槽，所述弹性脱倒扣机构可拆卸式安装在装配槽内。所述弹性脱倒扣装配设置在型芯的装配槽内，当成型产品的安装孔预设位置变化时，可更换不同规格的镶块组件及弹针，使得弹针位置与产品安装孔精确匹配。
作为优选，本申请中的注塑模具包括模具本体，模具本体包括上复板和下复板，型腔设置在上复板下方，下复板上设置有模脚，模脚上设置有顶板组，所述顶板组包括上顶板和下顶板，所述上顶板与下顶板叠放设置，所述的型芯设置在顶板组上。所述上顶板与下顶板组合形成两点对顶杆进行固定和加强，保证顶杆的稳定性。
因此，本发明具有如下有益效果：(1)通过在型芯内设置的弹性脱倒扣机构进行产品塑型，在开模时仅通过弹针收缩即可完成脱倒扣，结构精巧，操作便捷；(2)所述镶块组件内部的双弹针对应成型产品的安装孔设置，确保合模状态下弹针插接与安装孔位置完成注塑成型，开模时双弹针收缩，安装孔保留，以此顺利实现产品脱倒扣；(3)楔形锁紧块配合楔形锁紧槽，既可确保锁紧块插入或脱离时动作顺畅，亦可避免锁紧块侧壁与双弹针尾端形成硬接触碰撞，有效提升锁紧块及镶块组件的工作稳定性；(4)子镶块既能解决在锁紧块脱离时基体落入锁紧槽中无法复位进而造成再次合模失败的问题，同时又能够避免基体因频繁动作而在容纳槽内转动磨损，甚至产生间隙造成顶出或回缩不到位的问题，能够有效避免导致成型或脱模失败。
附图说明
图1为本发明合模状态的结构示意图；
图2为本发明开模状态的结构示意图；
图3为本发明脱模后的结构示意图；
图4为实施例中弹性脱倒扣机构的剖面图；
图5为实施例中弹性脱倒扣机构的透视图；
图中：1-上复板、2-下复板、3-弹性脱倒扣机构、31-左向弹针、32-右向弹针、33-子镶块、4-型腔、41-锁紧块、5-型芯、51-装配槽、6-上顶板、7-模脚、8-下顶板、81-顶杆、9-镶块组件、91-左镶块、911-左凹槽、92-右镶块、921-右凹槽、10-成型产品、11-锁紧槽、12-基体、13-针体、14-弹性件、15-通槽、16-容纳槽、17-间隙。
具体实施方式
下面结合附图与具体实施方式对本发明做进一步的描述。所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
实施例1
如图1，2所示，一种汽车保险杠注塑模具内部双弹针脱倒扣机构，包括模具本体，所述模具本体包括有上复板1和下复板2，所述上复板下方设置有型腔4，所述下复板上方设置模脚7，模脚上设置有顶板组，顶板组上设置型芯5；其中，所述型芯5内设置有弹性脱倒扣机构3；弹性脱倒扣机构，通过弹力驱动型腔内的成型产品10脱倒扣；其中，如图5所示，所述弹性脱倒扣机构包括镶块组件9和设置于镶块组件内部的双弹针，合模状态下所述双弹针 末端抵接成型产品。所述弹性脱倒扣机构包括卡合安置于型芯5内的镶块组件9，所述镶块组件9根据成型产品的结构进行设计，具体地说，所述镶块组件9内部的双弹针对应成型产品的安装孔设置，确保合模状态下双弹针插接与安装孔位置完成注塑成型，开模时双弹针收缩，安装孔保留，以此顺利实现产品脱倒扣。
所述型芯5上设置有装配槽51，所述镶块组件9安装于装配槽51内，如图4所示，所述镶块组件9包括拼合连接的左镶块91和右镶块92，所述左镶块91靠近右镶块92的一侧设置有左凹槽911，所述右镶块92靠近左镶块91的一侧设置有右凹槽921，所述左凹槽911与右凹槽921拼合形成锁紧槽11，所述型腔4上对应锁紧槽11设置有锁紧块41，所述锁紧块插合连接锁紧槽11。所述锁紧块为楔形结构，包括一连接段和楔形段，其中楔形段朝向右镶块一侧的斜面长度大于朝向左镶块的斜面长度，所述锁紧槽为开口向上的楔形槽。所述镶块组件安置于装配槽51内，左镶块91与右镶块92上的左凹槽和右凹槽拼合形成锁紧槽，左镶块和右镶块内部沿垂直于锁紧槽轴线方向分别设置有左容纳槽和右容纳槽，并且左容纳槽与右容纳槽的轴线错位设置，本实施例中，右容纳槽的轴线平行设置在左容纳槽的轴线且位于左容纳槽轴线的右上方，左容纳槽和右容纳槽形成锁紧槽上横向设置的容纳槽16。
所述双弹针包括设置于左镶块上的左向弹针31和设置于右镶块上的右向弹针32，所述左向弹针与右向弹针分别抵接成型产品内部两侧，左向弹针和右向弹针的尾部设置为与锁紧块的楔形结构相配合的倾斜面结构，具体的，所述双弹针插合于容纳槽16内，并可延伸到左镶块和右镶块的外部。当锁紧块41插在锁紧槽11内时，锁紧块41侧壁分别抵合弹针尾部，确保弹针维持顶出状态对产品进行塑型。同时，锁紧块与插合后，锁紧块与左凹槽911上部槽壁之间设置有间隙17，楔形锁紧块配合楔形锁紧槽，既可确保锁紧块插入或脱离时动作顺畅，亦可避免锁紧块侧壁与弹针尾端形成硬接触碰撞，有效提升锁紧块及镶块组件的工作稳定性。本实施例中，左弹针与右弹针结构相同。
如图4、5所示，所述左向弹针和右向弹针分别包括同轴设置的基体12和针体13，所述针体外径小于基体外径，所述针体上套接设置有弹性件14，所述弹性件尾端抵接基体前端面，所述基体后端面可抵接锁紧块。所述左向弹针与右向弹针分别抵接倒扣产品倒扣部分的内部两侧，确保注塑成型过程中产品内部塑型顺利，而当左向弹针和右向弹针回缩时，能够快速脱离成型产品完成脱倒扣，支撑稳定且响应性好。所述弹性件套设在针体上，当锁紧块插入时，弹针在容纳槽内动作，基体压缩弹性件，针体伸出镶块并抵接成型产品的安装孔位置，完成支撑。而当锁紧块脱离时，弹性件释放弹力，基体带动针体反向滑动，针体回缩至镶块内部，产品脱倒扣完成，可被顺利顶出。本实施例中弹性件14采用弹簧。
如图5所示，左弹针和右弹针的基体12上分别设置有通槽15，通槽的轴线平行于锁紧块的轴线设置，对应的左镶块和右镶块上分别设置有连通通槽的滑动插孔，通槽和滑动插孔形成L型槽结构，左弹针和右弹针的通槽15内分别贯穿设置有子镶块33，所述子镶块分别纵向插合左镶块和右镶块的插孔内。所述子镶块纵向插合基体的通槽，起到限位和止转作用，当基体在容纳槽内滑动时，子镶块与基体一起滑动，既能解决在锁紧块脱离时基体落入锁紧槽中无法复位进而造成再次合模失败的问题，同时能够避免基体因频繁动作而在容纳槽内转动产生磨损，甚至产生间隙造成顶出或回缩不到位的问题，导致成型或脱模失败。
所述左向弹针与右向弹针平行设置。所述左向弹针与右向弹针分设于锁紧槽两侧且上下错位平行设置，能够保证在锁紧块脱离时最快响应进行回缩脱倒扣。
弹性脱倒扣机构可拆卸地连接在型芯内。所述弹性脱倒扣装配设置在型芯5的装配槽51内，当成型产品的安装孔预设位置变化时，可更换不同规格的镶块组件及弹针，使得弹针位置与产品安装孔精确匹配。
所述顶板组包括上顶板6和下顶板8，所述上顶板与下顶板叠放设置。所述上顶板与下顶板组合形成两点对顶杆81进行固定和加强，保证顶杆的稳定性。
如图3所示，本实施例中，合模前，首先组装镶块组件9：将弹性件14套接在针体13上组合得到左向弹针31，接着将左向弹针31自左凹槽911插入左镶块91的容纳槽内，接着从左镶块91下方将子镶块33插入基体12的通槽15内，对左向弹针31进行限位；接下来按照上述方式组装右镶块91内的右向弹针32和子镶块33；然后将左镶块与右镶块拼合连接为镶块组件，装配完成后，将镶块组件插入装配槽51内，完成弹性脱倒扣机构的安装。
在合模时，型腔4上的锁紧块41插合入左凹槽与右凹槽拼合形成的锁紧槽11，锁紧块两侧壁挤压左向弹针和右向弹针的基体尾部，两弹针的针体均伸出镶块组件并抵在产品成型后安装孔所在的位置，在产品成型后能够抵接注塑件内部，以此实现成型产品的内部支撑。开模时，上复板带动型腔向上运动，型腔与型芯分离，进而带动锁紧块41脱离锁紧槽11，顶板组带动其上的顶杆81向上顶出，此时由于锁紧块41脱出锁紧槽11，锁紧块对左向弹针和右向弹针的左右限位力消失，左向弹针及右向弹针向锁紧槽中心方向回缩，与产品上的安装孔脱离，弹针缩至镶块组件9中，成型产品脱倒扣完成，然后通过顶杆81向上顶出产品，完成脱模。本实施例中，对尺寸较小的成型产品进行注塑成型时，可通过设计与型芯尺寸相匹配的镶块组件实现注塑件内部的成型。
除上述实施例外，在本发明的权利要求书及说明书所公开的范围内，本发明的技术特征可以进行重新选择及组合，从而构成新的实施例，这些都是本领域技术人员无需进行创造性 劳动即可实现的，因此这些本发明没有详细描述的实施例也应视为本发明的具体实施例而在本发明的保护范围之内。

Claims (8)

  1. 一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于：包括设置在模具型芯(5)内的弹性脱倒扣机构(3)和设置在型腔(4)内部的锁紧块(41)；所述的锁紧块(41)与弹性脱倒扣机构(3)活动插合连接；所述弹性脱倒扣机构(3)包括镶块组件(9)和设置于镶块组件(9)内部的双弹针，所述的镶块组件(9)内部设置有锁紧槽(11)，所述的锁紧块(41)插合在锁紧槽(11)内部并且与双弹针相互抵接。
  2. 根据权利要求1所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述镶块组件包括拼合连接的左镶块(91)和右镶块(92)，所述左镶块(91)靠近右镶块(92)的一侧设置有左凹槽(911)，所述右镶块(92)靠近左镶块(91)的一侧设置有右凹槽(921)，所述左凹槽(911)与右凹槽(921)拼合形成锁紧槽(11)。
  3. 根据权利要求2所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述锁紧槽(11)为开口向上的楔形槽，所述锁紧块(41)与锁紧槽(11)插合段为楔形结构，锁紧块(41)与左凹槽(911)上部槽壁之间设置有间隙(17)。
  4. 根据权利要求2所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述双弹针包括设置于左镶块内部的左向弹针(31)和设置在右镶块内部的右向弹针(32)，所述左向弹针(31)与右向弹针(32)上下错位且平行设置，所述左向弹针(31)与右向弹针(32)分别伸缩式延伸到左镶块(91)和右镶块(92)的外部。
  5. 根据权利要求4所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述的左镶块(91)内部沿垂直于锁紧槽(11)的轴线方向设置有左容纳槽，所述的右镶块(92)内部沿垂直于锁紧槽(11)的轴线方向设置有右容纳槽，所述的右容纳槽与左容纳槽上下错位平行设置，左容纳槽和右容纳槽拼合形成容纳槽(16)，左向弹针设置在左容纳槽内部，右向弹针设置在右容纳槽内部。
  6. 根据权利要求1所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述双弹针分别包括同轴设置的基体(12)和针体(13)，所述针体(13)外径小于基体(12)外径，所述针体(13)上套接设置有弹性件(14)，所述弹性件(14)尾端抵接基体(12)前端面，所述基体(12)后端面为斜面并抵接锁紧块(41)。
  7. 根据权利要求6所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述基体上设置有通槽(15)，所述通槽(15)内贯穿设置有子镶块(33)，所述子镶块(33)纵向插合于镶块组件(9)并可随双弹针一起沿镶块组件左右滑动。
  8. 根据权利要求1-7任意一项所述的一种汽车保险杠注塑模具内部双弹针脱倒扣机构，其特征在于，所述型芯(5)上设置有装配槽(51)，所述弹性脱倒扣机构(3)可拆卸式安装在装配 槽内。
PCT/CN2021/133349 2021-04-29 2021-11-26 一种汽车保险杠注塑模具内部双弹针脱倒扣机构 WO2022227542A1 (zh)

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