WO2022236958A1 - Moule ayant un coulisseau de tirage de noyau de tunnel - Google Patents

Moule ayant un coulisseau de tirage de noyau de tunnel Download PDF

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Publication number
WO2022236958A1
WO2022236958A1 PCT/CN2021/107224 CN2021107224W WO2022236958A1 WO 2022236958 A1 WO2022236958 A1 WO 2022236958A1 CN 2021107224 W CN2021107224 W CN 2021107224W WO 2022236958 A1 WO2022236958 A1 WO 2022236958A1
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WO
WIPO (PCT)
Prior art keywords
core
mold
pulling
tunnel
slider
Prior art date
Application number
PCT/CN2021/107224
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English (en)
Chinese (zh)
Inventor
李卫荣
谢启金
王贵
陈学民
庞栋
唐国平
杨潘
李艳芳
Original Assignee
东莞宜安科技股份有限公司
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Publication date
Application filed by 东莞宜安科技股份有限公司 filed Critical 东莞宜安科技股份有限公司
Publication of WO2022236958A1 publication Critical patent/WO2022236958A1/fr

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    • 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 application relates to the technical field of molds, in particular to a mold with a tunnel core-pulling slider.
  • Die-casting mold is a method of casting liquid die forging.
  • the basic process is: the molten metal is first filled into the cavity of the mold by low-speed or high-speed casting.
  • the mold has a movable cavity surface, which increases with the cooling process of the molten metal. Press forging not only eliminates the shrinkage cavity and porosity defects of the blank, but also makes the internal structure of the blank reach the broken grains of the forged state, so that the comprehensive mechanical properties of the blank are significantly improved.
  • Tunnel core-pulling is a relatively common side core-pulling structure.
  • the core-pulling slider cannot be demoulded in time during the production process, and the core-pulling slider is easy to stick to the mold and get stuck, resulting in sand holes.
  • the following mold with a tunnel core-pulling slider is proposed.
  • the purpose of the present application is to provide a mold with a tunnel core-pulling slider to improve production efficiency and product quality.
  • a mold with a tunnel core-pulling slider comprising a rear mold and at least one core-pulling assembly
  • the rear mold includes a rear mold core and a rear mold frame, the rear mold frame is connected to the periphery of the rear mold core, the At least one tunnel is arranged in the rear mold core;
  • the core-pulling assembly includes a core-pulling slider, a guide post and a slider seat, one end of the core-pulling slider is arranged in the inner cavity of the slider seat, and the other end of the core-pulling slider is movably arranged in the inner cavity of the slider seat.
  • the tunnel at least one spray hole is communicated with the tunnel;
  • Both the slider seat and the rear mold frame are provided with through holes, and the guide posts are movably inserted in the two through holes.
  • one end of the slider seat close to the core-pulling slider is provided with a slot, and one end of the core-pulling slider is clamped in the slot.
  • the inclination between the guide post and the slider seat is 30°-75°.
  • the tunnel is provided with a plurality of spray holes, and the spray holes are spaced at the same distance.
  • the front mold includes a front mold core
  • the front mold core matches the rear mold core
  • the product to be die-cast is formed between the front mold core and the rear mold core after mold closing cavity.
  • the core-pulling assembly further includes an anti-feeding pin, the anti-feeding pin is arranged on the front mold core, and the anti-feeding pin cover is set on the spray hole after the mold is closed .
  • the rear mold core is provided with an inlet gate and a gate outlet near the top of the front mold core, and a heating assembly is provided on the top surface of the front mold core away from the rear mold core, and the heating assembly The area at least covers the cavity of the product to be die-cast.
  • the heating assembly is a coil formed by winding a wire, the wire is connected to the top surface of the front mold core, and the two ends of the coil are respectively used as positive and negative poles for connection to an external power supply.
  • the mold with the tunnel core-pulling slider includes a rear mold and a core-pulling assembly, a tunnel is arranged in the rear mold core, and the core-pulling assembly includes a core-pulling slider, a guide post and a slider seat, and the guide post is movably inserted.
  • the slider seat and the rear mold frame On the slider seat and the rear mold frame, at least one spray hole is connected to the tunnel. After the mold is opened, the release agent is directly sprayed on the core-pulling slider from the spray hole to lubricate and cool the core-pulling slider.
  • the guide post When the guide post is pulled out from the slider seat, it drives the slider seat to move outward, and the slider seat drives the core-pulling slider to move in the tunnel, so that the core-pulling slider completes the core-pulling action and cools the core-pulling slider in time.
  • the block prevents the core-pulling slider from sticking to the mold and causing sand holes in the product, which effectively improves the product quality and improves the operating efficiency.
  • Fig. 1 is a schematic diagram of the rear mold structure of a mold with a tunnel core-pulling slider provided in the embodiment of the present application;
  • Fig. 2 is a schematic diagram of the mold clamping structure provided by the embodiment of the present application with a tunnel core-pulling slider;
  • Fig. 3 is a structure diagram of the product to be die-casted provided by the embodiment of the present application.
  • Rear mold core 11 rear mold frame 12, spray hole 13, core-pulling slider 21, guide post 22, slider seat 23, anti-feed insert needle 24, front mold core 31, front mold frame 32
  • the present application provides a mold with a tunnel core-pulling slider, including a rear mold 1 and at least one core-pulling assembly 2, the rear mold 1 includes a rear mold kernel 11 and a rear mold frame 12, the rear mold The mold frame 12 is connected to the periphery of the rear mold core 11, and at least one tunnel is arranged in the rear mold core 11;
  • the core-pulling assembly 2 includes a core-pulling slider 21, a guide post 22 and a slider seat 23, one end of the core-pulling slider 21 is arranged in the inner cavity of the slider seat 23, and the other end of the core-pulling slider 21 is movably arranged in the tunnel , the tunnel is provided with at least one spray hole 13, and the spray hole 13 communicates with the tunnel;
  • Both the slider base 23 and the rear mold frame 12 are provided with through holes, and the guide posts 22 are movably inserted in the two through holes.
  • the mold of this embodiment is used for die-casting the product shown in Figure 3.
  • the product to be die-casted includes two core-pulling grooves 4 to be formed.
  • the mold includes two tunnels and two core-pulling assemblies 2. One tunnel corresponds to one core-pulling assembly 2. There is a spray hole 13.
  • one end of the core-pulling slider 21 is at the position of the core-pulling groove 4 of the product to be die-casted, and the guide post 22 is inserted on the slider seat 23 and the rear mold frame 12 .
  • the mold release agent is directly sprayed on the core-pulling slider 21 from the spray hole 13 to lubricate and cool the core-pulling slider 21.
  • the guide post 22 When the guide post 22 is pulled out from the slider seat 23, it will drive the slider seat 23 to move outward, and the slider seat 23 will drive the core-pulling slider 21 to move in the tunnel, thereby pulling out
  • the core slider 21 completes the core-pulling action, which prevents the core-pulling slider from sticking to the mold and causing sand holes in the product, thereby ensuring product quality and improving production efficiency.
  • the spray hole 13 is set on the tunnel, which effectively solves the problem that the mechanical spray nozzle cannot go deep into the cavity to carry out spray lubrication and cooling on the core-pulling slider.
  • the mold can also be blown through the spray hole 13 to remove some remaining scrap in the tunnel and prevent the core-pulling slider 21 from being stuck.
  • the mold with the tunnel core-pulling slider of this embodiment has been successfully applied to actual products, and the mold sticking defect rate of the core-pulling slider has been greatly reduced from 100% to 0%, which effectively reduces the production cost.
  • a slot is provided at one end of the slider seat 23 close to the core-pulling slider 21 , and one end of the core-pulling slider 21 is clamped in the slot.
  • the inclination between the guide post 22 and the slider seat 23 is 30°-75°, preferably, the inclination between the guide post 22 and the slider seat 23 is 15°-25°.
  • the slider seat 23 gradually moves outwards in a buffered manner, which avoids damage to the die-casted product when the slider seat 23 is pulled out quickly.
  • Different numbers of spray holes 13 are selected according to the actual length of the core-pulling slider 21 .
  • a plurality of spray holes 13 are arranged on the tunnel, and the distance between the spray holes 13 is the same.
  • two spray holes 13 are arranged on the tunnel, one spray hole 13 is used for spraying the release agent, and the other spray hole 13 is used for spraying air.
  • the mold further includes a front mold 3 , the front mold 3 includes a front mold core 31 and a front mold frame 32 , and the front mold frame 32 is connected to the periphery of the front mold core 31 .
  • the front mold core 31 is matched with the rear mold core 11, and the cavity of the die-casting product is formed between the bottom of the front mold core 31 and the top of the rear mold core 11 after mold closing.
  • the core pulling assembly 2 also includes an anti-feed insert 24, which is arranged on the front mold core 31, After mold closing, the anti-feeding insert 24 is covered on the spray hole 13, and the anti-feed insert 24 blocks the spray hole 13.
  • the rear mold core 11 is provided with an inlet gate and an outlet gate near the top of the front mold core 31, and a heating assembly is arranged on the top surface of the front mold core 31 away from the rear mold core 11, and the heating assembly The area at least covers the cavity of the product to be die-cast.
  • the heating component is used to reduce the temperature difference between the inlet gate and the outlet gate. Due to the small temperature difference, it can avoid product marks caused by the slow flow of raw materials at the outlet gate.
  • the heat energy generated by the heating component can reduce the wettability of the raw material and the contact surface of the mold, inhibit the heterogeneous nucleation during the filling process, reduce the viscosity, improve the fluidity, improve the filling ability, and make the raw material more closely bonded when solidified , improve the compactness and mechanical properties of the product, and avoid defects such as pores, shrinkage cavities, flow lines, and watermarks generated when raw materials flow.
  • the heating assembly is a coil formed by winding a wire, the wire is connected to the top surface of the front mold core 31, and the two ends of the coil are respectively used as the positive pole and the negative pole for connecting to an external power supply.
  • the coil is uniformly wound by wires to form a loop, and the material of the wires can be copper.
  • the mold with the tunnel core-pulling slider in this embodiment includes the rear mold 1 and the core-pulling assembly 2, the rear mold core 11 is provided with a tunnel, and the core-pulling assembly 2 includes the core-pulling slider 21, the guide post 22 and the slide
  • the block seat 23 and the guide post 22 are movably inserted on the slider seat 23 and the rear mold frame 12. At least one spray hole 13 is connected to the tunnel.
  • the release agent is directly sprayed on the core-pulling slide On the block 21, lubricate and cool the core-pulling slider 21, so that the core-pulling slider 21 can be pulled out from the product to be die-casted in time, avoiding the sticking of the core-pulling slider 21 and causing sand holes in the product, effectively improving the product quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

La présente invention concerne un moule ayant un coulisseau de tirage de noyau de tunnel, comprenant un moule arrière (1) et au moins un ensemble de tirage de noyau (2). Le moule arrière comprend un noyau de moule arrière (11) et un cadre de moule arrière (12) ; le cadre de moule arrière est relié à la périphérie du noyau de moule arrière ; au moins un tunnel est disposé dans le noyau de moule arrière ; l'ensemble de tirage de noyau comprend un coulisseau de tirage de noyau (21), un montant de guidage (22) et un siège de coulisseau (23) ; une extrémité du coulisseau de tirage de noyau est disposée dans la cavité interne du siège de coulisseau, et l'autre extrémité du coulisseau de tirage de noyau est disposée de manière mobile dans le tunnel ; au moins un trou de pulvérisation (13) est en communication sur le tunnel ; le siège de coulisseau et le cadre de moule arrière comportent tous les deux des trous traversants ; le montant de guidage est inséré de manière mobile dans les deux trous traversants. Une fois le moule ouvert, un agent de libération est directement pulvérisé sur le coulisseau de tirage de noyau à partir du trou de pulvérisation pour lubrifier et refroidir le coulisseau de tirage de noyau, de façon à éviter l'apparition de trous de sable dans un produit causés par le collage du coulisseau de tirage de noyau, permettant ainsi d'améliorer efficacement la qualité du produit.
PCT/CN2021/107224 2021-05-13 2021-07-20 Moule ayant un coulisseau de tirage de noyau de tunnel WO2022236958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202121022492.6U CN215237718U (zh) 2021-05-13 2021-05-13 一种带有隧道抽芯滑块的模具
CN202121022492.6 2021-05-13

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WO2022236958A1 true WO2022236958A1 (fr) 2022-11-17

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283350A (ja) * 2006-04-17 2007-11-01 Ryobi Ltd トンネル中子鋳抜きピンの加圧装置及びトンネル中子鋳抜きピンの加圧装置を用いた鋳造方法
CN205217989U (zh) * 2015-12-28 2016-05-11 上海五腾金属制品有限公司 一种用于压铸件的定模隧道抽芯结构
CN206230006U (zh) * 2016-12-10 2017-06-09 福建胜亚模具有限公司 一种隧道式抽芯模具
CN107570681A (zh) * 2017-09-21 2018-01-12 宁波环亚机械制造有限公司 一种铝合金压铸模具
CN207288839U (zh) * 2017-08-16 2018-05-01 深圳市建升科技股份有限公司 易加工易修模的隧道式抽芯结构
CN207343750U (zh) * 2017-09-21 2018-05-11 宁波环亚机械制造有限公司 一种便于滑块脱模的铝合金压铸模具结构
CN208866378U (zh) * 2018-08-16 2019-05-17 东莞市弘禾伟模具有限公司 隧道抽芯结构

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283350A (ja) * 2006-04-17 2007-11-01 Ryobi Ltd トンネル中子鋳抜きピンの加圧装置及びトンネル中子鋳抜きピンの加圧装置を用いた鋳造方法
CN205217989U (zh) * 2015-12-28 2016-05-11 上海五腾金属制品有限公司 一种用于压铸件的定模隧道抽芯结构
CN206230006U (zh) * 2016-12-10 2017-06-09 福建胜亚模具有限公司 一种隧道式抽芯模具
CN207288839U (zh) * 2017-08-16 2018-05-01 深圳市建升科技股份有限公司 易加工易修模的隧道式抽芯结构
CN107570681A (zh) * 2017-09-21 2018-01-12 宁波环亚机械制造有限公司 一种铝合金压铸模具
CN207343750U (zh) * 2017-09-21 2018-05-11 宁波环亚机械制造有限公司 一种便于滑块脱模的铝合金压铸模具结构
CN208866378U (zh) * 2018-08-16 2019-05-17 东莞市弘禾伟模具有限公司 隧道抽芯结构

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