WO2023040269A1 - Mécanisme d'entraînement de traction de noyau oblique droit - Google Patents

Mécanisme d'entraînement de traction de noyau oblique droit Download PDF

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Publication number
WO2023040269A1
WO2023040269A1 PCT/CN2022/088966 CN2022088966W WO2023040269A1 WO 2023040269 A1 WO2023040269 A1 WO 2023040269A1 CN 2022088966 W CN2022088966 W CN 2022088966W WO 2023040269 A1 WO2023040269 A1 WO 2023040269A1
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WO
WIPO (PCT)
Prior art keywords
core
straight
pulling
hole
oblique
Prior art date
Application number
PCT/CN2022/088966
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English (en)
Chinese (zh)
Inventor
梁正华
梁凯
王华良
林连明
Original Assignee
浙江凯华模具有限公司
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.)
Filing date
Publication date
Application filed by 浙江凯华模具有限公司 filed Critical 浙江凯华模具有限公司
Publication of WO2023040269A1 publication Critical patent/WO2023040269A1/fr

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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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies

Definitions

  • the invention relates to the technical field of injection molds, in particular to a straight-inclined core-pulling drive mechanism.
  • Forming molds for injection molding or die-casting often have a core mold and a core-pulling structure; the structure of the core-pulling mechanism can be obtained from a die-casting mold core-pulling structure disclosed in the utility model of Chinese Patent Application No. 202022594224.3; The structure can be understood from an oblique core-pulling structure disclosed in the utility model of Chinese Patent Application No. 202022594204.6.
  • FIG. 3 shows that a kind of casing type injection molding part that is provided with middle hole 31 and side wall 32, side wall is provided with straight hole group 33 and is positioned at the inclined hole group 34 of straight hole group lower side;
  • the purpose of the present invention is to overcome the disadvantages that the core-pulling mechanism has a compact structure, takes up a lot of space, is expensive and troublesome to maintain when the current forming mold has two core molds that need to be core-pulled from different core-pulling directions, and provides a
  • the core-pulling is realized by a core-pulling device with a simple structure and a small footprint, and a straight-inclined core-pulling drive mechanism with low cost and convenient maintenance.
  • a straight-inclined core-pulling drive mechanism comprising: an upper mold, a lower mold with a cavity counterbore at the upper end, a core with a central through hole and a lower convex core disc coaxial with the central through hole and connected to the lower end of the upper mold Die, core mold, upper mold and lower mold are surrounded by a cavity with a side cavity at the upper end, several straight inclined core assemblies distributed along the circumference of the middle through hole, and a straight inclined core pulling drive device;
  • the straight inclined core assembly includes : The straight core-pulling hole and the oblique core-pulling hole which are installed in the mandrel and whose two ends correspond to the central through hole and the side wall cavity one by one, the straight core-pulling rod placed in the straight core-pulling hole, and the straight core-pulling hole A straight core column connected to the outer end of the rod, an oblique core rod placed in the oblique core pulling hole, and an oblique core rod connected to the outer end of the ob
  • the straight core-pulling hole is located on the upper side of the oblique core-pulling hole.
  • the straight-inclined core-pulling driving device includes: a driving column whose upper end is provided with a diameter adapted to the diameter of the middle through hole and whose lower end is connected to the bottom surface of the counterbore of the cavity;
  • the number of push columns is the same as the number of straight inclined core components, and there is a one-to-one correspondence with the straight inclined core pulling device;
  • the straight inclined core pulling device includes: a storage counterbore arranged on the side of the middle through hole and connected with the upper end of the mandrel, The mounting counterbore provided at the outer end of the counterbore and connected to the upper end of the mandrel is placed in the counterbore and the outer end of the guide block is provided with a vertical T-shaped groove, which is located at the inner end of the guide block and is aligned with the frustum of the cone.
  • the two ends of the spring press the outer end of the guide block and the outer end of the installation counterbore one by one; the inner end of the oblique core pulling rod is connected with the guide block; the width of the guide block is adapted to the width of the accommodating counterbore.
  • the straight-inclined core-pulling drive device further includes: a limit block coaxial with the middle through hole and connected with the lower end of the upper mold.
  • the lower mold is provided with a straight counterbore located outside the side outer cavity and opposite to the straight stem, and an inclined counterbore opposite to the inclined stem.
  • the lower mold is provided with a plurality of ejector pin holes, ejector pins whose upper ends are located in the ejector pin holes, and top plates respectively connected to the lower ends of the ejector pins.
  • the upper end of the upper mold is provided with a runner communicating with the upper end of the side enclosure cavity.
  • the beneficial effect of the present invention is that: for the straight-inclined core-pulling drive mechanism, when the mold is closed, the upper end of the truncated cone-shaped push column is inserted into the conical surfaces provided at the inner ends of the guide blocks of multiple straight-inclined core-pulling devices. Between them, the frustum-shaped push column cooperates with the conical surface to push the guide block to drive the straight core rod and the oblique core rod to move outwards against the resistance of the pressure spring, and the outer ends of the straight core column and the oblique core column are inserted into the straight counterbore and the oblique core column one by one.
  • the oblique sinking hole since the right end of the straight core-pulling rod is connected with the slider placed in the large end of the vertical T-shaped slot and can slide vertically, there will be no interference; Under the action of the reset force of the compression spring, the compression spring pushes the guide block to drive the straight core-pulling rod and the oblique core-pulling rod to move inwardly, and the outer ends of the straight stem and the oblique stem respectively exit the straight counterbore and the oblique counterbore, and respectively Move inward to the straight core-pulling hole and the oblique core-pulling hole, since the right end of the straight core-pulling rod is connected with the slider placed in the large end of the vertical T-shaped slot and can slide vertically, there will be no interference; through a structure
  • the compact core-pulling device takes up less space to realize core-pulling, and the cost is low and the maintenance is convenient.
  • the limit block limits the inner end of the guide block to improve safety.
  • the lower mold is provided with a straight countersunk hole opposite to the straight stem and an oblique counterbore opposite to the slanted stem on the outside of the side enclosure cavity, which is conducive to accurate and stable positioning of the straight stem and the slant stem.
  • the lower mold is provided with a plurality of ejector pin holes, an ejector pin whose upper end is located in the ejector pin hole, and a top plate respectively connected with the lower end of the ejector pin, which is beneficial for ejecting the injection molded part.
  • Fig. 1 is a kind of structural representation of the present invention
  • Fig. 2 is the A-A view of Fig. 1;
  • Fig. 3 is a schematic structural view of an injection molded part of the case.
  • upper mold 1 cavity sink hole 2, lower mold 3, middle through hole 4, lower convex core plate 5, core mold 6, side cavity 7, cavity 8, straight core-pulling hole 9, oblique core-pulling Hole 10, straight core rod 11, straight core rod 12, oblique core rod 13, oblique core rod 14, drive column 15, frustum-shaped push rod 16, accommodating counterbore 17, installation counterbore 18, vertical T shape Groove 19, guide block 20, tapered surface 21, T-shaped slider 22, pressure spring 23, limit block 24, straight sink hole 25, oblique sink hole 26, ejector pin hole 27, ejector rod 28, top plate 29, sprue 30, middle hole 31, side wall 32, straight hole group 33, inclined hole group 34.
  • a straight-inclined core-pulling drive mechanism including: an upper mold 1, a lower mold 3 with a cavity sink hole 2 at the upper end, and a middle through hole 4 and a middle through hole 4
  • the coaxial lower convex core plate 5 and the core mold 6 screwed to the lower end of the upper mold 1, the core mold 6, the upper mold 1 and the lower mold 3 are surrounded by a cavity 8 with a side cavity 7 at the upper end, four Straight inclined core assembly uniformly distributed along the circumference of the central through hole 4, and a straight inclined core pulling drive device;
  • the straight inclined core assembly includes: pierced in the mandrel 6 and communicated with the central through hole 4 and the side enclosure cavity 7 in one-to-one correspondence at both ends
  • the straight core-pulling hole 9 and the inclined core-pulling hole 10, the straight core-pulling rod 11 placed in the straight core-pulling hole 9, and the straight core column 12 connected with the outer end of the straight core-pulling rod 11 are integrally formed, and the straight core-
  • the straight core-pulling hole 9 is located on the upper side of the oblique core-pulling hole 10 .
  • the straight-inclined core-pulling driving device includes: the upper end is provided with a driving column 15 whose diameter is in clearance fit with the diameter of the middle through hole 4, and the lower end is integrally connected with the bottom surface of the cavity 8 counterbore 2, and the large end is coaxial with the upper end of the driving column 15.
  • Conical frustum-shaped push columns 16 integrally formed, the number of which is the same as the number of straight-inclined core components and one-to-one corresponding straight-inclined core-pulling device; 6
  • the receiving counterbore 17 through which the upper end penetrates, and the installation counterbore 18 which is arranged at the outer end of the accommodating counterbore 17 and penetrates with the upper end of the mandrel 6 is placed in the accommodating counterbore 17 and the outer end is provided with a vertical T-shaped groove
  • the guide block 20 of 19 is set at the inner end of the guide block 20 and the conical surface 21 adapted to the frustum-shaped push column 16 is placed in the vertical T-shaped groove 19 and is screwed with the inner end of the straight core rod 11.
  • the slide block 22 is placed in the installation counterbore 18 and is set on the compression spring 23 outside the straight core pulling rod 11; the two ends of the compression spring 23 press the outer end of the guide block 20 and the outer end of the installation counterbore 18 correspondingly; The inner end of the core pulling rod 13 is connected with the guide block 20 .
  • the diameter of the large end of the frustum-shaped push column 16 is the same as that of the drive column 15;
  • the straight-inclined core-pulling driving device further includes: a limit block 24 coaxial with the middle through hole 4 and connected with the lower end of the upper die 1 .
  • the lower mold 3 is provided with a straight counterbore 25 located outside the side enclosure cavity 7 and opposite to the straight stem 12 , and an inclined counterbore 26 opposite to the inclined stem 14 .
  • the lower mold 3 is provided with a plurality of ejector pin holes 27, an ejector pin 28 whose upper end is located in the ejector pin hole 27, and a top plate 29 screwed to the lower end of the ejector pin 28 respectively.
  • the upper end of the upper mold 1 is provided with a runner 30 communicating with the upper end of the side enclosure cavity 7 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

La présente invention concerne un mécanisme d'entraînement de traction de noyau oblique droit, comprenant : un moule supérieur, un moule inférieur ayant une extrémité supérieure pourvue d'un contre-alésage de cavité, un moule de noyau pourvu d'un trou traversant central et d'un disque de noyau en saillie inférieur coaxial au trou traversant central, et relié à une extrémité inférieure du moule supérieur, une cavité entourée par le moule de noyau, le moule supérieur, et le moule inférieur et pourvue d'une enceinte latérale au niveau d'une extrémité supérieure, une pluralité d'ensembles noyaux obliques droits disposés le long de la direction circonférentielle du trou traversant central, et des appareils d'entraînement de traction de noyau oblique droit. Chaque ensemble noyau oblique droit comprend : un trou de traction de noyau droit et un trou de traction de noyau oblique passant à travers le moule de noyau et ayant les deux extrémités en communication avec le trou traversant central et l'enceinte latérale d'une manière de correspondance biunivoque, une tige de traction de noyau droit disposée dans le trou de traction de noyau droit, une colonne à noyau droit reliée à une extrémité externe de la tige de traction à noyau droit, une tige de traction de noyau oblique disposée dans le trou de traction de noyau oblique, et une colonne de noyau oblique reliée à une extrémité externe de la tige de traction de noyau oblique. Selon le mécanisme d'entraînement de traction de noyau oblique droit, une traction de noyau est obtenue au moyen d'un appareil de traction de noyau ayant une structure compacte, occupant un petit espace, un faible coût et un entretien pratique.
PCT/CN2022/088966 2021-09-14 2022-04-25 Mécanisme d'entraînement de traction de noyau oblique droit WO2023040269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111074580.5 2021-09-14
CN202111074580.5A CN113733490B (zh) 2021-09-14 2021-09-14 直斜抽芯驱动机构

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WO2023040269A1 true WO2023040269A1 (fr) 2023-03-23

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113733490B (zh) * 2021-09-14 2023-01-06 浙江凯华模具有限公司 直斜抽芯驱动机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060186575A1 (en) * 2005-02-24 2006-08-24 Prskalo Bill Z Multi-material mold and method of making multi-material parts
CN202399479U (zh) * 2011-12-16 2012-08-29 宁波万隆模塑成型有限公司 侧抽芯注塑模
CN106493919A (zh) * 2016-12-20 2017-03-15 宁波周龙塑胶模具有限公司 一种注塑模具向心收缩分步抽芯脱模装置
CN208728659U (zh) * 2018-08-23 2019-04-12 襄阳美利信科技有限责任公司 一种动模斜抽芯机构
CN213860407U (zh) * 2020-08-10 2021-08-03 任建平 直抽与斜抽联合抽芯结构
CN113733490A (zh) * 2021-09-14 2021-12-03 浙江凯华模具有限公司 直斜抽芯驱动机构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060186575A1 (en) * 2005-02-24 2006-08-24 Prskalo Bill Z Multi-material mold and method of making multi-material parts
CN202399479U (zh) * 2011-12-16 2012-08-29 宁波万隆模塑成型有限公司 侧抽芯注塑模
CN106493919A (zh) * 2016-12-20 2017-03-15 宁波周龙塑胶模具有限公司 一种注塑模具向心收缩分步抽芯脱模装置
CN208728659U (zh) * 2018-08-23 2019-04-12 襄阳美利信科技有限责任公司 一种动模斜抽芯机构
CN213860407U (zh) * 2020-08-10 2021-08-03 任建平 直抽与斜抽联合抽芯结构
CN113733490A (zh) * 2021-09-14 2021-12-03 浙江凯华模具有限公司 直斜抽芯驱动机构

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CN113733490A (zh) 2021-12-03

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