CN208879674U - A kind of improved vehicle cabinet low pressure casting die - Google Patents

Abstract

The utility model discloses a kind of improved vehicle cabinet low pressure casting dies, are related to aluminium alloy casting technology field, to solve the uneven and easy to form casting part stomata of die venting, owe the defects of casting or profile are unintelligible.It includes upper die and lower die and side form component, further includes sand core component cast type chamber, and sand core component is fixed in lower die by positioning base, and positioning base is equipped with the tap hole being connected to casting type chamber, and exhaust passage is equipped in upper mold；Sand core component is interconnected and main sand core is emptied.By implementing the technical program, balanced exhaust in cabinet casting process can be achieved, casting type intracavity gas is discharged rapidly, molding cabinet is not present bleb, owes the defects of casting or profile are unintelligible, product qualification rate reaches 99.9% or more, effectively improves the certified product rate of mould casting.

Description

A kind of improved vehicle cabinet low pressure casting die

Technical field

The utility model relates to aluminium alloy casting technology fields, more particularly to a kind of improved vehicle cabinet low pressure Casting mould.

Background technique

Emission control with countries in the world for vehicle exhaust is increasingly stringenter, existing commercial vehicle vent gas treatment cabinet casting Upgrading is inevitable outcome.Since market vehicle engine engine efficiency and dynamic property are more demanding, company casts vehicle tail gas in research and development When handling cabinet, improve metal liquid emphatically in the intracavitary mobility of casting type, and constantly to filling profile material, metal die and sand Core improves, and customizes automobile-used vent gas treatment cabinet casting special equipment.

Vehicle tail gas handles cabinet, and structure is complicated, in uneven thickness；The most thin place of product only has 5mm, and product most it is thick it Place reaches 30mm, and highly up to 500mm, product is easy to appear imperfect molding, shrinkage porosite, cold shut etc.；And three casting type chamber phases It to independence, cannot mutually seep water, the disposable casting and forming difficulty of product is big；Through researching and developing, vehicle tail gas handles cabinet and uses half sand Type low-pressure casting process, sand core are made of for manufacturing the material of type core casting model powder, moulding sand binder etc. in Foundry Production； Core sand is divided into clay core sand, waterglass core sand, wick sand, conjunction rouge core sand, resin core sand etc. by binder difference used.It is existing automobile-used Vent gas treatment cabinet uses the lower resin sand of gas forming amount, since structure is complicated for vehicle tail gas processing cabinet, using integral type sand Core design is difficult to reach product design precision；If being sectional type by core design, crack after sand core can be facilitated to form.

In view of the above research, it is difficult that those skilled in the art encounter following technology in vehicle tail gas processing cabinet low pressure casting Point: the leakproofness of mold should be guaranteed by being made due to low pressure cast, solve the exhausting problem of mould cast type chamber and sand core, gold again When category liquid is filled with casting type chamber, with the continuous diminution of casting cavity space, and sectional type sand core is due to molten aluminum covering generation Gas floats rapidly, if the intracavitary gas of casting type cannot be smoothly discharged rapidly, the intracavitary counter-pressure of casting type is excessive, gas Body can not only hinder molten metal further to fill type and cause to cast low efficiency；The prior box flange disk knot for being proximate to upper mold Structure exhaust is obstructed, and casting type intracavity gas immerses under pressure fills type cast-internal, is formed bleb, is owed casting or profile The defects of unintelligible.

The Chinese patent of Publication No. CN104889365B discloses a kind of metal-mold low-pressure casting exhaust apparatus and exhaust Method, exhaust apparatus include exhaust apparatus main body, and the cavity for exhaust is equipped in exhaust apparatus main body, is equipped with ceramics in cavity High temperature resistant made of fiber is every liquid air-permeable layer, and high temperature resistant is equipped with fixed frame above liquid air-permeable layer, and high temperature resistant is every under liquid air-permeable layer Side is equipped with gas vent, and gas vent includes the bellmouth and bellmouth boss of connection, and the small head end and bellmouth boss of bellmouth connect Logical, bellmouth boss is straight, and bellmouth boss is positioned close to high temperature resistant every the side of liquid air-permeable layer, have easy mold release, Good exhaust effect and the advantages of changed convenient for visual inspection cast product exhaust gas conditions and founding materials gas forming amount.

However for the large complicated special construction of vehicle tail gas processing cabinet, using such as above structure exhaust apparatus very Difficulty reaches, and casting type intracavity gas equilibrium is discharged, and especially casting type chamber upper end is revealed white close to the box flange dish cart of upper mold Band forms incomplete phenomenon.It is large complicated to be difficult to meet vehicle tail gas processing cabinet for existing low-pressure casting process as a result, Special construction, researching and designing one kind be able to satisfy vehicle tail gas processing cabinet low pressure casting die it is particularly important.

Utility model content

Uneven and easy to form casting part is vented in order to solve existing vehicle tail gas processing cabinet low pressure casting die Stomata owes the defects of casting or profile are unintelligible, and the purpose of this utility model is to provide a kind of castings of improved vehicle cabinet low pressure Modeling tool is effectively ensured cabinet and fills type equilibrium completely, avoids there are bleb, owes the defects of casting or profile are unintelligible.

The utility model specifically uses following technical scheme to achieve the goals above:

A kind of improved vehicle cabinet low pressure casting die, including upper die and lower die and between upper die and lower die The casting type chamber that side form component further includes sand core component and is surrounded by upper die and lower die and side form component around sand core component, it is described Sand core component is fixed in lower die by positioning base, and the positioning base is equipped with the tap hole being connected to casting type chamber, The upper mold is equipped with the exhaust passage being connected to casting type chamber；The sand core component includes main sand core, water channel sand cores, draw Sand core, cross sand core and the lug sand core being fixed on positioning base, are equipped in the main sand core and the exhaust passage connects The upper end of logical hollow cavity, the water channel sand cores and draw sand core positions core print by A respectively and B positions core print and is embedded in main sand In-core.

The working principle of the utility model base case are as follows: the above-mentioned die casting vehicle tail gas of application handles cabinet, molten aluminum It is intracavitary to be injected into casting type from lower to upper through tap hole, as molten aluminum is constantly filled with casting type chamber, casting type cavity space is continuous It reduces, the gas generated by the intracavitary gas for being heated expansion of casting type and sectional type sand core by molten aluminum covering is on the one hand by upper The exhaust passage of mould excludes；And more gases are then the hollow cavity discharges being connected to by main sand core with exhaust passage；Main sand core is drawn Sky can reduce sand dosage, can also reduce the sand core gas forming amount for being reduced by sand dosage and being generated.And it is fixed by A positioning core print and B Position core print is embedded in the water channel sand cores in main sand core not only can be reliable with the mutual supporting & stablizing of main sand core, positioning with draw sand core； And can effectively be connected to draw sand core, water channel sand cores with main sand core, the gas that draw sand core and water channel sand cores generate is drawn It becomes owner of in sand core, and mould cast type chamber, good exhaust effect is discharged by the main sand core of hollow setting；Even if it is complete to fill type in mold It can also be exhausted by the hollow cavity of main sand core after, cabinet fills that type is high-efficient and to fill type uniformly complete, can effectively avoid and deposits In bleb, owe the defects of casting or profile are unintelligible.

Preferred embodiment, the material of the positioning base are H13 mould steel, and the main sand core is fixed on point by cross sand core On discharge orifice, it is intracavitary that molten aluminum through the fit clearance of cross sand core and tap hole enters casting type.Positioning base uses H13 mold steel At, structural strength is high, can stablize and support other sand mold parts, and relatively traditional sand mold pedestal has better stability of strutting system, and It is not susceptible to aluminum water long-time high temperature and washes away lead to the caducous situation of pedestal sand；Can also effectively reduce mold sand using amount and by The gas forming amount that sand is formed, saving sand while, can effectively reuse metal mold positioning base.

Preferred embodiment, the lower end of the draw sand core are embedded in main sand core and main sand core location fit, the draw The upper end of sand core is equipped with cone blind hole in the side of opposite B positioning core print, and draw sand core passes through the bolt with cone blind hole cooperation It is located by connecting with side form component.Sand core, which is become owner of, using the bending part edge down of draw sand core lower end applies core binder again, to Support draw sand core lower end positioned with main sand core, and utilize draw sand core upper end B position core print directly with main sand Core cooperation, to support draw sand core upper end to be positioned with main sand core, and is inserted into bolt after molding, can be effectively by small water Road sand core is positioned with side form, accurately controls the spacing between draw sand core and main sand core, guarantee draw sand core with Main sand core supporting & stablizing, positioning are reliable, avoid causing water channel difference casting type chamber to there is mutually infiltration there is a phenomenon where dislocation, Guarantee the design accuracy of mould casting, improves mould casting certified product rate；And the matching design of bolt and cone blind hole also can reach one Fixed exhaust effect.

Preferred embodiment is offered on the side form component with the inlaid hole of casting type chamber connection and is adapted with inlaid hole Insert, bolt insertion casting type in the middle part of the insert is intracavitary；And it is set in the mating surface of side form component inlaid hole and insert There are at least two logical variable diameter conduits of layback outside casting type chamber to side form component.It is equipped in insert along the insertion of casting type chamber Along the groove of side form recess, and herein exactly in the upper end of metal casting type chamber, pass through the edge being detachably connected with side form shell Block design can efficiently use the gas drawn in the logical variable diameter conduit discharge intracavitary socket of casting type, draw sand core is effectively ensured The mould casting at top is not easy to perforate；And insert is detachably connected with side form component, can prevent from blocking convenient for cleaning variable diameter conduit Influence next exhaust effect.

Preferred embodiment, the variable diameter conduit are six, and six variable diameter conduits are uniformly set along inlaid hole side wall is equidistant It sets；And the clearance height of every variable diameter conduit is from close to the stepped increase on the outside of side form component of casting type chamber one end.To protect The intracavitary leakproofness of casting type is demonstrate,proved, and is smoothly excluded from variable diameter conduit to reach gas, it is necessary to properly determine exhaust passage Area, and by exhaust passage design into a ladder, on the one hand avoid exhaust passage drawn apart from it is too long and formed blocking, be easy to gold Belong to mold insert dismounting convenient for exhaust；On the other hand it can effectively ensure that the intracavitary leakproofness of casting type, this is reasonable in design ingenious.

Preferred embodiment, the lower end of the water channel sand cores, which is inserted on positioning base, to be fixed, and the upper end of water channel sand cores passes through A Positioning core print is inserted into main sand core and is positioned, and the mating surface of A positioning core print and main sand core is equipped at least two exhaust counterbores. Enter positioning base using the edge down of water channel sand cores lower end and apply core binder again, to support water channel sand cores lower end and positioning base It is positioned, and the A positioning core print of water channel sand cores upper end is utilized to be inserted into main sand core, to support water channel sand cores upper end and main sand Core is positioned, to be accurately positioned the spacing between water channel sand cores and main sand core, avoids misplacing in cavity filling process；And it arranges The design of gas counterbore can effectively increase the leaving area of water channel sand cores, be introduced water channel sand cores gas by two counterbore inner concaves In main sand core, leaving area is relatively large, optimizes the exhaust effect of water channel sand cores.

Preferred embodiment, the upper end of the water channel sand cores set there are two along casting type chamber upper vertical extend exhaust core Head, two exhaust core prints all extend in the exhaust passage of upper mold.The design of exhaust core print is effectively directed to casting type chamber top The special construction of portion's box flange disk designs, and gas effectively can be drawn mold through casting type chamber, avoid filling after the completion of type It can reach the effect being vented rapidly, advanced optimize casting exhaust system of cavity.

Preferred embodiment, two exhaust core prints and the intracavitary box flange disk to be formed of casting type reserve tapping fabrication hole Position it is corresponding, and each exhaust core print is cylindric, and is vented the size of core print and the screw thread of box flange disk The size in hole is adapted.The special construction that the design of exhaust core print not only can effectively avoid casting type top of chamber box flange disk is set Meter leads to the problem of upper mold exhaust passage exhaust effect difference, instead can effectively directly formation and cabinet on molding ring flange The compatible reserved tapping fabrication hole of the size of the threaded hole of ring flange, can effectively reduce box flange disk later period drilling operating, Convenient for tapping, cabinet processing efficiency can be effectively improved while improving cabinet processing quality, the smart structural design is reasonable.

As described above, the utility model having the beneficial effect that compared with the prior art:

1. each sand mold part of sectional type is mounted on metal mold positioning base by the utility model, the material of positioning base is H13 mould steel, positioning base structural strength is high, can stablize and support other sand mold parts, and positioning base is optimized for metal pedestal, relatively Traditional sand mold pedestal is not susceptible to aluminum water long-time high temperature and washes away lead to the caducous situation of pedestal sand.

2. the utility model positions core print by A and B positions the water channel sand cores and draw sand that core print is embedded in main sand core Core not only can be reliable with the mutual supporting & stablizing of main sand core, positioning；And effectively draw sand core, water channel sand cores and main sand core can be connected It is logical, the gas that draw sand core and water channel sand cores generate is introduced in main sand core, and mould is discharged by the main sand core of hollow setting Have casting type chamber, can reach preferable exhaust effect；Balanced each position exhaust of casting type chamber, even if after the completion of mold fills type It can be exhausted by the hollow cavity of main sand core, cabinet fills that type is high-efficient and to fill type uniformly complete, can effectively avoid that there are casting Stomata owes the defects of casting or profile are unintelligible.

3. the exhaust core print of the ad hoc meter in the utility model water channel sand cores upper end extended along casting type chamber upper vertical, effectively For the special construction of casting type top of chamber box flange disk, on the one hand gas can be drawn through casting type chamber by exhaust core print Mold out, avoiding the special construction of casting type top of chamber box flange disk from designing leads to asking for upper mold exhaust passage exhaust effect difference Topic；On the other hand it effectively can directly be formed on molding ring flange compatible with the size of the threaded hole of box flange disk Reserved tapping fabrication hole, can effectively reduce box flange disk later period drilling operating, be convenient for tapping, improve the same of cabinet processing quality When can effectively improve cabinet processing efficiency, the smart structural design is reasonable.

4. the utility model opens up inlaid hole and the design that insert is arranged on side form, it can efficiently use and draw logical variable diameter The gas in the intracavitary socket of casting type is discharged in conduit, and the mould casting at the top of draw sand core is effectively ensured and is not easy to perforate；And it inlays Block is detachably connected with side form component, can prevent blocking from influencing next exhaust effect convenient for cleaning variable diameter conduit, can be further excellent Change die venting effect.

Detailed description of the invention

Fig. 1 is a kind of perspective view of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 2 is a kind of sectional front view of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 3 is a kind of lateral sectional view of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 4 is a kind of top cross-sectional view of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 5 is the scheme of installation of sand core component in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 6 is the perspective view of the explosion of Fig. 5；

Fig. 7 is the schematic diagram of cross sand core in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 8 is the schematic diagram of water channel sand cores in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Fig. 9 is the schematic diagram of small water channel sand cores in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Figure 10 is the cross-sectional view of overflowing structure in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Figure 11 is the schematic diagram of overflowing structure in a kind of improved vehicle cabinet low pressure casting die of the utility model；

Figure 12 is the cut-away view of insert mounting structure in a kind of improved vehicle cabinet low pressure casting die of the utility model.

Specific embodiment

It is further described below by specific embodiment:

Appended drawing reference in Figure of description includes: 1- upper mold, 2- lower die, 3- side form component, the front side 31- mould, 32- rear side Mould, the right side 34- mould, 5- sand core component, the main sand core of 51-, 52- water channel sand cores, 53- draw sand core, 54- cross on the left of mould, 33- Sand core, 55- lug sand core, 6- positioning base, 7- tap hole, 8- exhaust passage, 9- casting type chamber, 10-A position core print, 11-B Position core print, 12- overflowing structure, 121- overflow port, 122- overflow launder, 123- exhaust duct, 13- cone blind hole, 14- bolt, 15- edge Embedding hole, 16- insert, 17- variable diameter conduit, 18- exhaust counterbore, 19- exhaust core print, 20- box flange disk, 21- upper mould fixed plate, 22- lower mold fixed plate, 23- thimble fixed plate, 24- ejecting mechanism, 25- upper mold connecting plate, 26- support column, 27- sliding rail.

Embodiment 1

It please refers to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the present embodiment provides a kind of improved vehicle cabinet low pressure casting moulds Tool, including upper mold 1, lower die 2 and the side form component 3 between upper mold 1 and lower die 2, specifically, upper mold 1 is fixed on upper mold In fixed plate 21, lower die 2 is fixed on upper mould fixed plate 22, and is equipped with and is used between upper mould fixed plate 21 and upper mould fixed plate 22 Four support columns 26 of fixed upper mould fixed plate 21 and upper mould fixed plate 22, four support columns 26 be distributed in upper mould fixed plate 21 with Four opposite right angles of upper mould fixed plate 22.The sliding rail 27 being slidably connected with side form component 3, side form are installed on bottom plate Component 3 includes front side mould 31, rear side mould 32, left side mould 33 and right side mould 34, and side form connection is mounted on four side form parts Plate drives side form component 3 to slide along sliding rail 27, realizes molding and demoulding by driving side form connecting plate；And in upper mould fixed plate 21 top is equipped with ejecting mechanism 24 by upper mold connecting plate 25, the top including thimble fixed plate 23 and driving casting demoulding Needle, and the actuator and ejecting mechanism 24 of the movement of driving side membrane module 3 are the prior art, details are not described herein.

The mold further include sand core component 5 and surrounded by upper mold 1, lower die 2 and side form component 3 around sand core component 5 with Vehicle tail gas handles the identical casting type chamber 9 of box outline, and sand core component 5 is fixed in lower die 2 by positioning base 6, positions The material of pedestal 6 is high temperature high voltage resistant metalwork, preferably H13 mould steel, and structural strength is high, can stablize and support other sand molds Part, relatively traditional sand mold pedestal have better stability of strutting system, and are not susceptible to aluminum water long-time high temperature and wash away lead to pedestal The caducous situation of sand；The gas forming amount that mold sand using amount can also be effectively reduced and formed by sand, saving sand while, can have Effect recycling metal mold positioning base 6.

Referring to figure 5., shown in Fig. 6 and Fig. 7, sand core component 5 include main sand core 51, water channel sand cores 52, draw sand core 53, Cross sand core 54 and the lug sand core 55 being fixed on positioning base 6 are equipped on positioning base 6 and are connected to casting type chamber 9 Tap hole 7, main sand core 51 is fixed on tap hole 7 by cross sand core 54, and molten aluminum is matched through cross sand core 54 and tap hole 7 Gap is closed to enter in casting type chamber 9；Specifically, it is overlapped on 7 upper end of tap hole in cross sand core 54, in the upper end of cross sand core 54 Equipped with round boss, the bottom of main sand core 51 is equipped with the groove cooperated with round boss, and cross sand core 54 is inserted by round boss It becomes owner of in the groove of sand core 51 and is positioned with it；Molten aluminum can be effectively controlled through cross sand core 54 in the careful design of cross sand core 54 With the fit clearance of tap hole 7, guarantee molten aluminum even into the casting type chamber 9 in each path.

Be equipped with the exhaust passage 8 that be connected to casting type chamber 9 in upper mold 1, exhaust passage 8 be it is a plurality of, can be by gas from casting Mold is discharged in part type chamber 9；Main sand core 51 is first emptied before being inserted vertically into positioning base 6, specifically, main sand core 51 it is transversal The rectangle that face is about 100mm × 122mm, main sand core 51 solidify layer depth in 15-20mm, with main 51 center line of sand core are The heart, sectional area are soft without cured in the sand of 80mm × 100mm, can be emptied；The cavity emptied in main sand core 51 is The hollow cavity being connected to exhaust passage 8, and the upper end of water channel sand cores 52 and draw sand core 53 respectively by A position core print 10 and B positioning core print 11 is embedded in main sand core 51, positions core print 10 by A and B positions core print 11 and is embedded in the water channel sand in main sand core 51 Core 52 and draw sand core 53 not only can be reliable with the mutual supporting & stablizing of main sand core 51, positioning；And it can be effectively by draw sand core 53, water channel sand cores 52 are connected to main sand core 51, and the gas that draw sand core 53 and water channel sand cores 52 are generated introduces main sand core 51 It is interior, and mould cast type chamber 9 is discharged by exhaust passage 8.

Incorporated by reference to shown in Fig. 5, Fig. 6 and Fig. 9, draw sand core 53 is including 53 core body of draw sand core and along draw sand The bending end of 53 core body lower end of core setting, 53 core of draw sand core as linear block structure, 53 core body of draw sand core with Bending end is equipped with arc-shaped corner structure, to be embedded in main 51 lower end of sand core, to support 53 lower end of draw sand core and main sand Core 51 is positioned；And guarantee to be not easy the phenomenon that generating drop of rubbing of colliding in position fixing process.The upper end of draw sand core 53 It is equipped with cone blind hole 13 in the side of opposite B positioning core print 11, to pass through in the insertion cone blind hole 13 of bolt 14 after molding, convenient for branch Support 53 upper end of draw sand core is positioned with metal die；And it is equipped with metal mold limited block in the bottom of cone blind hole 13, it avoids The phenomenon that generating friction drop with cone 13 bottom of blind hole in the insertion cone blind hole 13 of bolt 14 generate positioning and loosen influencing product Quality.To position the lower core operation of core print 11 convenient for draw sand core 53B, B is positioned to the circular in cross-section shape of core print 11, and B The diameter for positioning 11 cross section of core print is inserted into main 51 side of sand core along it and gradually successively decreases, and is not only convenient for lower core positioning accuracy height, and There is no the structures of corner angle seamed edge, are not easy drop of colliding with, and practicability is good.

Outside the length direction for the 53 core body of upper end edge draw sand core that 53 core body of draw sand core is connect with B positioning core print 11 Expand into arc structure, and the center of circle line of arc structure is passed through along cone 13 center of blind hole, and with the axial line of B positioning core print 11 same On straight line, the stress intensity of one end that 53 core body of draw sand core is connect with core print boss can be effectively improved, core print is avoided Boss, which is inserted into main sand core 51, to be offseted with main sand core 51 or is inserted into cone blind hole 13 and 53 core of draw sand core using bolt 14 The phenomenon that occurring sand core deformation when body offsets or losing increases by 53 locating effect of draw sand core and guarantees that its structural rigidity is strong simultaneously Degree.

Incorporated by reference to shown in Fig. 5, Fig. 6 and Fig. 8, water channel sand cores 52 include 52 core body of water channel sand cores, 52 core body of water channel sand cores Lower end insertion positioning base 6 is positioned, and end is inserted into main sand core 51 by A positioning core print 10 and is carried out with 52 core of water channel sand cores Positioning, 52 core body of water channel sand cores are inserted into main sand core 51A positioning core print 10 along the 52 perpendicular bending of core body of water channel sand cores, and vertical The A positioning core print 10 of bending is the boss structure that bottom surface is rectangle.What 52 core body of water channel sand cores and main sand core 51 were cooperatively connected Upper end is set there are two exhaust core print 19 is extended along 9 upper vertical of casting type chamber, and two exhaust core prints 19 all extend to the row of upper mold 1 In gas channel 8, the design of exhaust core print 19 is effectively designed for the special construction of 9 top canister ring flange 20 of casting type chamber, can Gas is effectively drawn into mold through casting type chamber 9, avoids filling and also can reach the effect being vented rapidly after the completion of type, it is further excellent Change casting exhaust system of cavity.And box flange disk 20 to be formed reserves tapping in two exhaust core prints 19 and casting type chamber 9 The position of fabrication hole is corresponding, and each exhaust core print 19 is cylindric, and is vented the size and box flange disk of core print 19 The size of 20 threaded hole is adapted, and then the design for being vented core print 19 not only can effectively avoid 9 top canister method of casting type chamber The special construction design of blue disk 20 leads to the problem of 1 exhaust passage of upper mold, 8 exhaust effect difference, instead can be effectively in molding method Reserved tapping fabrication hole compatible with the size of the threaded hole of box flange disk 20 is directly formed on blue disk, can effectively reduce case 20 later period of body ring flange drilling operating is convenient for tapping, can effectively improve cabinet processing efficiency while improving cabinet processing quality, The smart structural design is reasonable.

It please refers to shown in Fig. 2, Fig. 3, Figure 10 and Figure 11, the Exhausting System being connected to casting type chamber 9 is equipped in upper mold 1, Exhausting System includes the multiple overflowing structures 12 being uniformly arranged around casting type chamber 9, and each overflowing structure 12 includes Overflow port 121, overflow launder 122 and exhaust duct 123, and overflow port 121, overflow launder 122 and exhaust duct 123 are along far from casting type chamber 9 direction is sequentially communicated.Specifically design forms the row being connected to casting type chamber 9 in 1 bottom of upper mold to overflowing structure 12 after molding Excessive structure 12, structure is simple, and technological design is at low cost, and easy mold release, and Exhausting System is not easy to block, convenient for cleaning environmental protection without dirt Dye.

The problem of sealing and exhaust of low pressure mold are opposite contradiction, and introduce the overflow port of the Exhausting System of die-casting process 121 along overflow launder 122 the stepped increase of clearance height, and overflow launder 122 is stepped along the clearance height of exhaust duct 123 Reduce, just can solve the relationship of exhaust and sealing, that is, can reach the relationship of sealing, die venting ability can also be increased； And then high temperature resistant can be added at overflow port 121 every liquid air-permeable layer, avoid molten metal after the completion of filling type from entering in Exhausting System, into Even and if fill after the completion of type also can reach continue exhaust effect, optimize Exhausting System.

Specific embodiment of the present utility model are as follows: above-mentioned die casting is applied to vehicle tail gas and handles box mold, Dedicated sectional type sand core component 5 is customized first, respectively empties main sand core 51 and gas sand core component 5 is fixed on main sand On core 51；The lower end of main sand core 51 is fixed in the tap hole 7 of positioning base 6 by cross sand core 54 again；By sand core component 5 After location and installation is good, move and drive 1 downlink of upper mold to move along sliding rail 27 using existing actuator driving side membrane module 3, around The molding of sand core component 5 forms casting type chamber 9 identical with vehicle tail gas processing box outline.

Liter liquid is carried out after mold clamping and fills type, and molten aluminum is equal from lower to upper through cross sand core 54 and the fit clearance of tap hole 7 Even to be injected into casting type chamber 9, as molten aluminum is constantly filled with casting type chamber 9, space constantly reduces in casting type chamber 9, by casting The gas that the gas and sectional type sand core that expansion is heated in type chamber 9 are generated by molten aluminum covering is on the one hand by the exhaust of upper mold 1 Channel 8 is discharged；And since the special construction of 9 top canister ring flange 20 of casting type chamber designs, more gases are then by main sand Hollow cavity and the Exhausting System discharge that core 51 is connected to exhaust passage 8, main sand core 51 are vented equilibrium, and Exhausting System is arranged upper The box flange Pan20Chu of 1 bottom of mould may make molding box flange disk 20 compact-sized, and later period tapping thread silk tooth is full Full, product qualification rate reaches 99.9% or more, effectively improves the certified product rate of mould casting.

It fills after the completion of type, then carries out pressure maintaining crystallization-pressure release cooling-die sinking pickup, in view of each operating procedure and reaction Condition can be reasonably selected according to existing low-pressure casting process condition, and therefore not to repeat here.

Embodiment 2

Incorporated by reference to shown in Fig. 2 and 12, the present embodiment is further improved on the basis of embodiment 1, the mould 33 in left side On offer the inlaid hole 15 being connected to casting type chamber 9 and insert 16 compatible with inlaid hole 15, bolt 14 is along insert 16 Middle part is inserted into casting type chamber 9, and is equipped at least two along casting in the mating surface of 3 inlaid hole 15 of side form component and insert 16 The variable diameter conduit 17 that type chamber 9 leads to the outer layback of side form component 3 is equipped in insert 16 along the insertion of casting type chamber 9 recessed along side form Sunken groove, and herein exactly in the upper end of metal casting type chamber 9, it is set by the insert 16 being detachably connected with side form shell Meter can efficiently use the gas for drawing logical variable diameter conduit 17 to be discharged in casting type chamber 9 in socket, draw sand core 53 is effectively ensured The mould casting at top is not easy to perforate；And insert 16 is detachably connected with side form component 3, can be prevented convenient for cleaning variable diameter conduit 17 Only blocking influences next exhaust effect.

For the present embodiment for providing six variable diameter conduits 17, six variable diameter conduits 17 are equidistant along 15 side wall of inlaid hole Even setting to guarantee the leakproofness in casting type chamber 9, and is smoothly excluded from variable diameter conduit 17, it is necessary to properly to reach gas Determine the area of exhaust passage 8, and by and every variable diameter conduit 17 clearance height from close to 9 one end of casting type chamber along side form group On the one hand the stepped increase in the outside of part 3 avoids exhaust passage 8 from being drawn apart from too long and form blocking, is easy to metal inserted piece and tears open Dress is convenient for exhaust；On the other hand it can effectively ensure that the leakproofness in casting type chamber 9, this is reasonable in design ingenious.

Embodiment 3

Incorporated by reference to shown in Fig. 5 and Fig. 8, the present embodiment is further improved on the basis of embodiment 2, specifically, water Multiple exhaust counterbores 18 can be set in the mating surface of road positioning core print and main sand core 51；The present embodiment is to provide two exhaust counterbores 18 For, and two exhaust counterbores 18 are arranged along the bottom center of boss structure in mirror symmetry, since water channel sand cores 52 are automobile-used It places vertically and sets in vent gas treatment box mold, the exhaust counterbore 18 of mirror symmetry setting can spread direction along gas and draw gas side by side It becomes owner of in sand core 51, plays preferable exhaust effect, structure design is simple ingenious.

And diameter of the present embodiment to provide two round exhaust counterbores 18 can effectively increase water channel sand cores 52 for 12mm Leaving area.Mixed gas not only can be introduced to 9 outside of casting type chamber by two exhaust core prints 19 by the present embodiment, and can be led to The air flue for crossing two counterbore inner concaves introduces 52 gas of water channel sand cores in main sand core 51, fast by the main sand core 51 of hollow setting Speed discharge mould cast type chamber 9, is designed to circular counter bore, deflation area for exhaust counterbore 18 in the case where avoiding friction drop Product is relatively large；So that molding box flange disk 20 is compact-sized in the casting type chamber 9 at 52 top of water channel sand cores, later period tapping Screw thread silk tooth is fuller.

The above, the only preferred embodiment of the utility model, are not intended to limit the utility model, the utility model Scope of patent protection be subject to claims, it is equivalent made by all specifications and accompanying drawing content with the utility model Structure change similarly should be included in the protection scope of the utility model.

Claims (8)

1. a kind of improved vehicle cabinet low pressure casting die, the side including upper die and lower die and between upper die and lower die Membrane module, it is characterised in that: further include sand core component and the casting that is surrounded by upper die and lower die and side form component around sand core component Type chamber, the sand core component are fixed in lower die by positioning base, and the positioning base is equipped with and is connected to casting type chamber Tap hole is equipped with the exhaust passage being connected to casting type chamber in the upper mold；The sand core component includes main sand core, water channel sand Core, draw sand core, cross sand core and the lug sand core being fixed on positioning base, are equipped in the main sand core and the row The upper end of the hollow cavity of gas channel connection, the water channel sand cores and draw sand core positions core print by A respectively and B positions core print It is embedded in main sand core.

2. a kind of improved vehicle cabinet low pressure casting die according to claim 1, it is characterised in that: the positioning bottom The material of seat is H13 mould steel, and the main sand core is fixed on tap hole by cross sand core, and molten aluminum is through cross sand core and shunts It is intracavitary that the fit clearance in hole enters casting type.

3. a kind of improved vehicle cabinet low pressure casting die according to claim 1, it is characterised in that: the draw The lower end of sand core, which is embedded in main sand core, positions core print in opposite B with main sand core location fit, the upper end of the draw sand core Side is equipped with cone blind hole, and draw sand core is located by connecting by the bolt cooperated with cone blind hole with side form component.

4. a kind of improved vehicle cabinet low pressure casting die according to claim 3, it is characterised in that: the side form group The inlaid hole being connected to casting type chamber and insert compatible with inlaid hole are offered on part, the bolt is inserted in the middle part of insert It is intracavitary to enter casting type；And at least two are equipped in the mating surface of side form component inlaid hole and insert along casting type chamber to side form group The logical variable diameter conduit of the outer layback of part.

5. a kind of improved vehicle cabinet low pressure casting die according to claim 4, it is characterised in that: the variable diameter slot Road is six, and six variable diameter conduits are uniformly arranged along inlaid hole side wall is equidistant；And the clearance height of every variable diameter conduit From close to the stepped increase on the outside of side form component of casting type chamber one end.

6. a kind of improved vehicle cabinet low pressure casting die described in -5 any one according to claim 1, it is characterised in that: It is fixed on the lower end insertion positioning base of the water channel sand cores, the upper end of water channel sand cores positions core print by A and is inserted into main sand Core is positioned, and the mating surface of A positioning core print and main sand core is equipped at least two exhaust counterbores.

7. a kind of improved vehicle cabinet low pressure casting die according to claim 6, it is characterised in that: in the water channel The upper end of sand core is set there are two the exhaust core print extended along casting type chamber upper vertical, and two exhaust core prints all extend to In the exhaust passage of mould.

8. a kind of improved vehicle cabinet low pressure casting die according to claim 7, it is characterised in that: two rows Gaseous core head is corresponding with the reserved position of tapping fabrication hole of the intracavitary box flange disk to be formed of casting type, and each exhaust Core print is cylindric, and the size for being vented core print is adapted with the size of the threaded hole of box flange disk.