CN102601928A - Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method - Google Patents
Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method Download PDFInfo
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- CN102601928A CN102601928A CN2012100467895A CN201210046789A CN102601928A CN 102601928 A CN102601928 A CN 102601928A CN 2012100467895 A CN2012100467895 A CN 2012100467895A CN 201210046789 A CN201210046789 A CN 201210046789A CN 102601928 A CN102601928 A CN 102601928A
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Abstract
The invention relates to a fully sealed mold ultra-high vacuum die-casting and injection molding device and an operation method. A mold sealing box is arranged outside a mold in an ordinary die-casting and injection molding machine, a feed inlet of a mold cavity is provided with a sealing plug, and a micromesh screen is arranged in a vacuum-pumping pipe orifice of the mold cavity. A vacuum-pumping device is started for pumping out air in the sealing box and the mold cavity, liquid metal or plastic which is molten at high temperature firstly breaks through the sealing plug of the feed inlet from the feed inlet, smoothly flows into the mold cavity in an ultra-high vacuum state and flows in the ultra-high vacuum mold cavity in an accelerated manner, the cavity is rapidly filled with the liquid metal or the plastic for casting a workpiece, and when metal or plastic liquid which is molten at the high temperature is in contact with the edge of the vacuum-pumping pipe orifice of the mold cavity, the metal liquid or the plastic liquid is blocked by the micromesh screen arranged in the vacuum-pumping pipe orifice of the mold cavity for preventing the molten metal liquid or the plastic liquid from blocking a vacuum pipeline. A product which is formed by die-casting and injection molding through the device disclosed by the invention has the advantages of high precision, lower air hole level and high finished product rate.
Description
Technical field
The present invention relates to evacuated die-casting process injection moulding apparatus and method of operating, particularly a kind of hermetically sealed mould ultrahigh vacuum die casting injection moulding apparatus and method of operating.
Background technology
Evacuated die-casting process, injection moulding apparatus and method of operating have been widely used in metal and plastics casting field.
The method of evacuated die-casting process, injection moulding has multiple, and the technological core of evacuated die-casting process, injection moulding is a sealed mold how, improves the vacuum in the mold cavity.Up-to-date achievement in research shows that the vacuum in the mold cavity is high more, and melt metal or plastic liquid are good more in the mold cavity internal mobility, and the pore rank in metal or the plastic castings is low more.Influence at present improves the principal element of the vacuum in the mold cavity: one, mould does not have hermetically sealed.Along with improving constantly of the vacuum in the mold cavity; Air in the foundry goods thimble of die casting machine, injection machine and the slight void of dynamic model is attracted to produce high speed airflow by the high vacuum in the mold cavity and gets into mold cavity; Melt metal or plastic liquid in the direct Impact mould die cavity of air-flow; Make melt metal or plastic liquid generation turbulent flow generation pore in the mold cavity; Influence the quality of product, and oxidation takes place in air-flow and the metal or the plastic castings that get in the mold cavity under high temperature action, influence the quality of product.Two, the mold cavity charging aperture does not have sealing device.Melt metal or plastic liquid are from the process of charging aperture injection mold cavity, and the outer air of mould also gets into mold cavity thereupon, and the vacuum in the mold cavity is reduced, and do not reach the state of ultrahigh vacuum far away, influence the effect of evacuated die-casting process, injection moulding.Three, the vacuum orifice of mold cavity does not have molten metal liquid or plastic liquid baffling device.Molten metal liquid or plastic liquid are easy to from the vacuum orifice entering vacuum pipe of mold cavity, stop up vacuum pipe under the effect of condition of high vacuum degree, cause production accident.
Summary of the invention
The objective of the invention is to develop a kind of hermetically sealed mould ultrahigh vacuum die casting injection moulding apparatus and method of operating, solve three key issues of the gas clean-up in above-mentioned evacuated die-casting process, the injection machine mold cavity:
1, in common die casting, the outside of injection mold, the mould seal box is set, when vacuumizing; Form vaccum interval in the middle of seal box and the mould; Not only significantly improve the vacuum in the mold cavity, the vacuum pressure in the vacuum pressing and casting mold cavity is reduced to below 2000 handkerchiefs, quicken melt metal or the flowability of plastic liquid in mold cavity; And the slight void of die casting machine foundry goods thimble and dynamic model also is in vacuum state; Do not have melt metal or plastic liquid in the gas shock mold cavity, oxidation can not take place, improve the quality of product.
2, at the mold cavity charging aperture sealing-plug is set; Be arranged on the sealing-plug of heat-fusible materials in the charging aperture of mold cavity earlier; Find time again air in the mold cavity, make reach ultrahigh vacuum in the mold cavity after, the metal or the plastic liquid of high temperature fused state inject from charging aperture; The fusion rapidly when the metal of high temperature fused state or plastics contact of the sealing-plug of heat-fusible materials, liquid metal or plastics get into casting the mold cavity of ultra-high vacuum state from charging aperture.
3, vacuumizing of mold cavity micro-mesh high temperature resistant, constant type material is set in the pore, intercepts fused solution and get into vacuum pipe, prevent that effectively molten metal liquid or plastic liquid from stopping up vacuum pipe.
The objective of the invention is to realize like this:
One, hermetically sealed mould ultrahigh vacuum die casting injection moulding apparatus:
1, the outside of mould in common die casting, injection machine is provided with the mould seal box:
The outside of mould in common die casting, injection machine is provided with the mould seal box, cover half seal box and back dynamic model seal box before the mould seal box comprises.The outside of cover half before preceding cover half seal box is arranged on, back dynamic model seal box is arranged on the outside of back dynamic model, and back dynamic model is provided with the foundry goods thimble with back dynamic model seal box is middle, and the base of back dynamic model seal box is provided with and ejects rod, and the periphery that ejects rod is provided with sealing ring.Appropriate location at preceding cover half seal box or back dynamic model seal box is provided with one or more vacuum-pumping tube, on the contact-making surface of preceding cover half seal box and back dynamic model seal box, sealing ring is set.Become the mould seal box after current cover half seal box and the back dynamic model seal box closure, mould seal box and preceding cover half and the middle formation of back dynamic model vaccum interval when vacuumizing.In the appropriate location at preceding cover half or dynamic model edge, back or in the appropriate location at preceding cover half and edge, the closed place of back dynamic model one or more vacuum orifice is set, each vacuum orifice is communicated with die cavity and seal box vaccum interval.
2, at the mold cavity charging aperture sealing-plug is set:
The material of charging aperture sealing-plug has low melting point, low-gravity, low-density and air-locked advantage; Charging aperture sealing-plug material selection foamed plastic of the present invention, plastic sheeting; First-selected foamed plastic; Comprise the foamed plastic that polyvinyl chloride, polyethylene, polystyrene, polyurethane are processed, proportion is 10-100 milligram/cubic centimetre.Foamed plastic is processed the foamed plastic sealing-plug identical with charging aperture internal diameter shape, inserts the foamed plastic sealing-plug in the charging aperture.The metal or the plastic liquid of high temperature fused state inject from charging aperture; The fusion rapidly when the metal of high temperature fused state or plastics contact of the sealing-plug of heat-fusible materials; Liquid metal or plastics get into casting the mold cavity from charging aperture; Prevent that effectively air from getting into mold cavity from the mold cavity charging aperture; Keep mold cavity to be in ultra-high vacuum state, solved that charging aperture does not have sealing device and causes the mold cavity inner air pressure to be difficult to reach the problem of ultra-high vacuum state in the vacuum pressing and casting method.
3, vacuumizing of mold cavity micro-mesh is set in the pore:
The material requirements that micro-mesh is set in each vacuum orifice is ventilative, high temperature resistant, modification not.Micro-mesh can be selected the husky made of metal, pottery or resin for use, and the husky material of the first-selected resin of the present invention is processed the husky micropore plug of resin.With the 80-140 purpose fine sand of the high-quality of 92-98 weight portion and the phenolic resins of 2-8 weight portion; Heating phenolic resins to molten condition and with after fine sand evenly mixes; Be pressed into the husky micro-mesh of resin that the inlet internal diameter shape of the vacuum pipe that is connected with mold cavity adapts, be arranged on the husky micro-mesh of resin in the inlet of the vacuum pipe that is connected with mold cavity.
Two, the method for operating of hermetically sealed mould ultrahigh vacuum die casting injection moulding:
After preceding cover half seal box and the back dynamic model seal box closure; Start vacuum extractor find time seal box and the interior air of mold cavity; Behind the state of pressure less than 2000 handkerchiefs of air in seal box and the mold cavity; Close the valve of vacuum extractor, the liquid metal of high-temperature fusion or plastics at first break through the charging aperture sealing-plug from charging aperture, the moment that the charging aperture sealing-plug contacts with the liquid of high temperature fused state fusion volatilization rapidly; The liquid metal of high-temperature fusion or plastics flow in the mold cavity of ultra-high vacuum state smoothly; In the mold cavity of ultrahigh vacuum, quicken to flow, be full of die cavity rapidly and cast workpiece, dissatisfiedly vacuumize the pore limit to mold cavity when the metal of high-temperature fusion or plastic liquid connect; Intercepted by the micro-mesh that is provided with in the pore vacuumizing of mold cavity, prevent that molten metal liquid or plastic liquid from stopping up vacuum pipe.
The present invention and prior art contrast have following advantage:
1, the vaccum interval in the mould seal box significantly improves the vacuum in the mold cavity; Vacuum pressure in the vacuum pressing and casting mold cavity is reduced in 2000 handkerchiefs; Quicken melt metal or the flowability of plastic liquid in mold cavity, and the slight void of die casting machine thimble and back dynamic model is in vacuum state, do not have melt metal or plastic liquid in the gas shock mold cavity; Also oxidation can not take place, the precision of foundry goods is high, the pore rank is low more, yield rate is high.
2, at the mold cavity charging aperture sealing-plug is set; Make mold cavity charging aperture sealing, reach ultrahigh vacuum in the mold cavity after, the metal or the plastic liquid of high temperature fused state inject from charging aperture; The fusion rapidly when the metal of high temperature fused state or plastics contact of the sealing-plug of heat-fusible materials; Liquid metal or plastics get into casting the mold cavity from charging aperture, prevent that effectively air from getting into mold cavity from the mold cavity charging aperture, keep mold cavity to be in ultra-high vacuum state.
3, vacuumize at each the micropore plug is set in the hole, the metal of high-temperature fusion or plastic liquid inject mold cavity from charging aperture and are intercepted by micro-mesh, prevent that molten metal liquid or plastic liquid from stopping up vacuum pipe.Hole sizer is high temperature resistant, modification not; The husky micro-mesh of resin is arranged in the inlet of the vacuum pipe that is connected with mold cavity; Intercept fused solution and get into vacuum pipe, can prevent effectively that molten metal liquid or plastic liquid from stopping up vacuum pipe, guarantee the unimpeded and safety in production of vacuum tube.
Description of drawings
Fig. 1 is the embodiment side-looking cross-sectional view of apparatus of the present invention.
Among the figure: 1, preceding cover half seal box, 2, preceding cover half, 3, back dynamic model seal box, 4, the back dynamic model, 5, guide pillar; 6, sealing ring, 7, the cooling water circulating slot, 8, vacuum-pumping tube, 9, the husky micropore plug of resin; 10, foundry goods thimble, 11, eject rod, 12, sealing ring, 13, the charging aperture sealing-plug.
The specific embodiment
In conjunction with Fig. 1 and embodiment, describe device of the present invention and method of operating in detail.
Embodiment:
Adopt the device and the method for operating of hermetically sealed mould ultrahigh vacuum zinc die casting alloys stores van formwork
One, adopt the device of hermetically sealed mould ultrahigh vacuum zinc die casting alloys stores van formwork, as shown in Figure 1:
1, the mould seal box is set:
Cover half seal box 1 and back dynamic model seal box 3 before the outer setting mould seal box of mould in common die casting machine, mould seal box comprise.The outside of cover half 2 before preceding cover half seal box 1 is arranged on, back dynamic model seal box 3 is arranged on the outside of back dynamic model 4.Back dynamic model 4 and the back dynamic model seal box 3 middle foundry goods thimbles 10 that are provided with, the base of back dynamic model seal box 3 is provided with and ejects rod 11, and the periphery that ejects rod 11 is provided with two sealing rings 12.The side of dynamic model seal box 3 is provided with a vacuum-pumping tube 8 in the back, and vacuum-pumping tube 8 is communicated with evacuator.On the contact-making surface of preceding cover half seal box 1 and back dynamic model seal box 3, sealing ring 6 is set.Become seal box after current cover half seal box 1 and back dynamic model seal box 3 closures, seal box and preceding cover half 2 and back dynamic model 4 middle formation vaccum intervals when vacuumizing.Preceding cover half seal box 1 is provided with four guide pillars 5 with the periphery of back dynamic model seal box 3.Preceding cover half seal box 1 can slide front and back on guide pillar 5 with back dynamic model seal box 3.In preceding cover half 2 and back dynamic model 4, cooling water circulating slot 7 is set respectively.Both sides, middle part at preceding cover half and edge, the closed place of back dynamic model respectively are provided with a vacuum orifice, and each vacuum orifice is communicated with die cavity and seal box vaccum interval.
2, at the mold cavity charging aperture sealing-plug is set:
Preferred specific gravity is the materials of the foam polyvinyl chloride plastics of 1O milligram/cubic centimetre as charging aperture sealing-plug 13.Above-mentioned foam polyvinyl chloride plastics are processed the foamed plastic charging aperture sealing-plug 13 identical with charging aperture internal diameter shape.The height of charging aperture sealing-plug 13 is 12 millimeters, and diameter is 15 millimeters.Insert charging aperture sealing-plug 13 in the charging aperture.
3, vacuumizing of mold cavity micro-mesh is set in the pore:
Each vacuum orifice is communicated with die cavity and seal box vaccum interval, and the husky micropore plug 9 of a resin is set in each vacuum orifice.Select 120 purpose fine sands and the phenolic resins of 6 weight portions of the high-quality of 94 weight portions for use, heating phenolic resins to molten condition and with after fine sand evenly mixes is pressed into resin sand micro-mesh 9.
Two, adopt the method for operating of hermetically sealed mould ultrahigh vacuum zinc die casting alloys stores van formwork
Before after cover half seal box and the back dynamic model seal box closure, start vacuum extractor, the air in the mold cavity of finding time, make the ultrahigh vacuum that produces 2000 handkerchiefs in the mold cavity after, close the valve of vacuum extractor.Liquid zinc alloy material is quickened to flow from the mold cavity of charging aperture entering ultravacuum state, is full of die cavity and casts the car die housing.
Claims (3)
1. hermetically sealed mould ultrahigh vacuum die casting injection moulding apparatus is characterized in that:
(1), in common die casting, injection machine the outside of mould, the mould seal box is set:
The outside of mould in common die casting, injection machine; The mould seal box is set; Cover half seal box (1) and back dynamic model seal box (3) before the mould seal box comprises; Preceding cover half seal box (1) is arranged on the outside of preceding cover half (2), and back dynamic model seal box (3) is arranged on the outside of back dynamic model (4), back dynamic model (4) and the middle foundry goods thimble (10) that is provided with of back dynamic model seal box (3); The base of back dynamic model seal box (3) is provided with and ejects rod (11); The periphery that ejects rod (11) is provided with sealing ring (12), in the appropriate location of preceding cover half seal box (1) or back dynamic model seal box (3) one or more vacuum-pumping tube (8) is set, and on the contact-making surface of preceding cover half seal box (1) and back dynamic model seal box (3), sealing ring (6) is set; Become the mould seal box after current cover half seal box (1) and back dynamic model seal box (3) closure; Form vaccum interval in the middle of mould seal box and preceding cover half (2) and the back dynamic model (4) when vacuumizing, in the appropriate location at preceding cover half (2) or dynamic model (4) edge, back or in the appropriate location at preceding cover half and edge, the closed place of back dynamic model one or more vacuum orifice is set, each vacuum orifice is communicated with die cavity and seal box vaccum interval;
(2), at the mold cavity charging aperture sealing-plug is set:
Charging aperture sealing-plug material of the present invention (13) is selected foamed plastic for use; Adopt foamed plastic to process the charging aperture sealing-plug (13) identical with charging aperture internal diameter shape; Insert charging aperture sealing-plug (13) in the charging aperture; The metal or the plastic liquid of high temperature fused state inject from charging aperture, the fusion rapidly when the metal of high temperature fused state or plastics contact of the sealing-plug of heat-fusible materials, and liquid metal or plastics get into casting the mold cavity from charging aperture; Prevent that effectively air from getting into mold cavity from the mold cavity charging aperture, keep mold cavity to be in ultra-high vacuum state;
(3), vacuumizing of mold cavity micro-mesh is set in the pore:
Each vacuum orifice is communicated with die cavity and seal box vaccum interval; Vacuumizing of mold cavity micro-mesh is set in the pore; Micro-mesh is selected the husky made of resin for use; The 80-140 purpose fine sand of the high-quality of the husky micropore plug employing of resin 92-98 weight portion and the phenolic resins of 2-8 weight portion; Heating phenolic resins to molten condition and with after fine sand evenly mixes is pressed into the resin sand micro-mesh (9) that the inlet internal diameter shape of the vacuum pipe that is connected with mold cavity adapts, and is arranged on resin sand micro-mesh (9) in the inlet of the vacuum pipe that is connected with mold cavity.
2. hermetically sealed mould ultrahigh vacuum die casting injection moulding apparatus according to claim 1, it is characterized in that: described foamed plastic comprises the foamed plastic that polyvinyl chloride, polyethylene, polystyrene, polyurethane are processed.
3. the method for operating of hermetically sealed mould ultrahigh vacuum die casting injection moulding; It is characterized in that: after cover half seal box and the back dynamic model seal box closure; Start vacuum extractor find time seal box and the interior air of mold cavity, behind the state of pressure less than 2000 handkerchiefs of air in seal box and the mold cavity, close the valve of vacuum extractor; The liquid metal of high-temperature fusion or plastics at first break through the charging aperture sealing-plug from charging aperture; The moment that the charging aperture sealing-plug contacts with the liquid of high temperature fused state fusion volatilization rapidly, the liquid metal of high-temperature fusion or plastics flow in the mold cavity of ultra-high vacuum state smoothly, in the mold cavity of ultrahigh vacuum, quicken to flow; Be full of die cavity rapidly and cast workpiece; When the metal of high-temperature fusion or plastic liquid connect dissatisfied to mold cavity vacuumize the pore limit, intercepted by the micro-mesh that is provided with in the pore vacuumizing of mold cavity, prevent that molten metal liquid or plastic liquid from stopping up vacuum pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210046789.5A CN102601928B (en) | 2012-02-17 | 2012-02-17 | Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method |
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| CN201210046789.5A CN102601928B (en) | 2012-02-17 | 2012-02-17 | Fully sealed mold ultra-high vacuum die-casting and injection molding device and operation method |
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| CN102601928B CN102601928B (en) | 2015-05-13 |
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Cited By (9)
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| CN104416145A (en) * | 2013-09-11 | 2015-03-18 | 增城市运豪五金塑料有限公司 | Bolt-type mold clamping device for vacuum die-casting machine and operating method of bolt-type mold clamping device |
| CN104552790A (en) * | 2012-11-23 | 2015-04-29 | 朱保生 | Casting injection molding mold for agricultural machinery |
| CN104985156A (en) * | 2015-06-15 | 2015-10-21 | 广州城建职业学院 | Full sealing thermal type vacuum die-casting die assembly |
| WO2017118408A1 (en) * | 2016-01-06 | 2017-07-13 | 士纬科技股份有限公司 | Thermal cracking system |
| CN107984694A (en) * | 2017-11-29 | 2018-05-04 | 苏州南诚塑料制品有限公司 | A kind of die injection moulding positioner |
| CN108215052A (en) * | 2017-12-30 | 2018-06-29 | 大连銮艺精密模塑制造有限公司 | Prevent the method for liquid crystal polymer resin injection moulding process surface product defect |
| CN109194056A (en) * | 2018-07-24 | 2019-01-11 | 青岛海立美达电机有限公司 | A kind of small-power permanent magnetic multi-pole magnet ring rotor injection molding production technology |
| CN110681840A (en) * | 2019-10-21 | 2020-01-14 | 胡利丽 | High-vacuum die-casting device for die-casting die |
| CN110802211A (en) * | 2019-11-29 | 2020-02-18 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552790A (en) * | 2012-11-23 | 2015-04-29 | 朱保生 | Casting injection molding mold for agricultural machinery |
| CN104416145A (en) * | 2013-09-11 | 2015-03-18 | 增城市运豪五金塑料有限公司 | Bolt-type mold clamping device for vacuum die-casting machine and operating method of bolt-type mold clamping device |
| CN104985156A (en) * | 2015-06-15 | 2015-10-21 | 广州城建职业学院 | Full sealing thermal type vacuum die-casting die assembly |
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| CN108215052A (en) * | 2017-12-30 | 2018-06-29 | 大连銮艺精密模塑制造有限公司 | Prevent the method for liquid crystal polymer resin injection moulding process surface product defect |
| CN109194056A (en) * | 2018-07-24 | 2019-01-11 | 青岛海立美达电机有限公司 | A kind of small-power permanent magnetic multi-pole magnet ring rotor injection molding production technology |
| CN110681840A (en) * | 2019-10-21 | 2020-01-14 | 胡利丽 | High-vacuum die-casting device for die-casting die |
| CN110802211A (en) * | 2019-11-29 | 2020-02-18 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
| CN110802211B (en) * | 2019-11-29 | 2022-01-04 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
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