CN109332597A - A kind of the sand core mounting structure and its installation method of automobile-used cabinet - Google Patents
A kind of the sand core mounting structure and its installation method of automobile-used cabinet Download PDFInfo
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- CN109332597A CN109332597A CN201811217867.7A CN201811217867A CN109332597A CN 109332597 A CN109332597 A CN 109332597A CN 201811217867 A CN201811217867 A CN 201811217867A CN 109332597 A CN109332597 A CN 109332597A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
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Abstract
The invention discloses a kind of sand core mounting structure of automobile-used cabinet and its installation methods, are related to sand core manufacturing technology field, unstable to solve the positioning of existing sectional type sand core structure, and situations such as be easy to appear sand core fracture, position of leaping up after assembling, deviate.Sand core mounting structure includes box mold and the metab that is arranged in lower die, sand core is assembled on metab in order, successively include draw sand core is carried out side form installation lug sand core-after positioning-closing with main sand core cross sand core is overlapped in tap hole-main sand core is mounted on cross sand core-positioning water channel sand cores and metab and main sand core, then mold detection sand core whether be broken, position of leaping up, offset.By implementing the technical program, the stability of sand core location and installation can be effectively improved, simple and fast and accurate positioning is installed, and exhaust effect of the sectional type sand core structure in cabinet casting process can be improved.
Description
Technical field
The present invention relates to sand core manufacturing technology fields, a kind of sand core mounting structure more particularly to automobile-used cabinet and
Its installation method.
Background technique
Emission control with countries in the world for vehicle exhaust is increasingly stringenter, and existing vehicle tail gas processing cabinet casting rises
Grade is inevitable outcome.Since market vehicle engine engine efficiency and dynamic property are more demanding, company is at research and development casting vehicle tail gas
When managing cabinet, improve metal liquid emphatically in the intracavitary mobility of type, and constantly to fill profile material, metal die and sand core carry out
It improves, customizes automobile-used casting special equipment.
Through researching and developing, vehicle tail gas handles cabinet and uses half sand mold low-pressure casting process, and sand core is in Foundry Production for making
The material of moulding core is made of casting model powder, moulding sand binder etc.；Core sand is divided into clay core sand, water glass by binder difference used
Glass core sand, wick sand, conjunction rouge core sand, resin core sand etc..Existing vehicle tail gas processing cabinet uses the lower resin sand of gas forming amount, but
Structure is complicated for box mold, and three type chambers are relatively independent, cannot mutually seep water, and the disposable casting and forming difficulty of product is big.By
In vehicle tail gas processing cabinet, structure is complicated, is difficult to reach product design precision using integral type core design；If sand core is set
It is calculated as sectional type, is cracked after sand core can be facilitated to form.
In view of the above research, those skilled in the art encounter following technological difficulties in sectional type assembly of sand core: on the one hand
That structure is complicated is elongated for part sand core part (such as water channel sand cores and draw sand core), and it is disconnected that sand core is easy to appear during molding
Split, position of leaping up, offset situations such as；On the other hand, sand core weight is about 3 times of box casting weight, and each sand core is mutually indepedent, sand core
Gas production is big, if during casting sectional type sand core structure generate gas cannot in time smooth discharge, be easy to cause casting group
Knitting loose and different parts, there are different degrees of shrinkage cavities, form bleb, owe the defects of casting or profile are unintelligible.
Summary of the invention
It is unstable in order to solve the positioning of existing sectional type sand core structure, and be easy to appear after assembling sand core fracture, position of leaping up,
Situations such as offset, the purpose of the present invention is to provide a kind of sand core mounting structure of automobile-used cabinet and its installation methods, can be effective
It improves the stability of sand core location and installation and improves exhaust effect of the sectional type sand core structure in casting process.
The present invention specifically uses following technical scheme to achieve the goals above:
A kind of sand core mounting structure of automobile-used cabinet, upper mold, front side mould including box mold, rear side mould, left side mould, the right side
Side form, lower die and the metab being arranged in lower die, the metab are equipped with tap hole, and sand core structure includes main sand
The lower end of core, water channel sand cores, draw sand core, cross sand core and lug sand core, the draw sand core is equipped with bending part, and small
The upper end of water channel sand cores is equipped with the first core print protrusion of the trapezoidal shape of axial cross section, and the main sand core is equipped with convex with the first core print
The first embedded groove for playing corresponding matching, the side that the first core print boss is right against on draw sand core is equipped with cone blind hole, described
Left side mould is equipped with the pin hole with cone blind hole corresponding matching；The upper end of the water channel sand cores is equipped with the second core that bottom surface is rectangle
Head protrusion, the main sand core are equipped with the second embedded groove with the second core print male cooperation, and the metab, which is equipped with, to supply water
The recess portion of road sand core insertion, the main sand core is interior to be equipped with the cavity being connected to upper mold exhaust passage.
Preferred embodiment, the upper end of the water channel sand cores are set there are two along the vertically extending exhaust core print in upper mold direction, and two
The exhaust core print is connected to the exhaust passage in upper mold.On the one hand exhaust core print is can generate water channel sand cores during casting
Gas extraction type chamber rapidly will not cause even if water channel sand cores are still generating gas after metal liquid overflows type chamber
There are problems that largely choking with resentment and influencing casting Forming Quality in mold cavity；And the type chamber of water channel sand cores and upper intermode is exactly case
Body ring flange forms chamber, and the position that exhaust core print extends can correspond to box flange disk and reserve tapping hole setting, to be vented core
Sand core exhaust effect not only can be improved in head setting, so that the flange plate structure of molding top of the box is compact, later period tapping thread silk
Tooth is full；And box flange disk later period drilling operating can be effectively reduced, it is convenient for tapping, can has while improving cabinet processing quality
Effect improves cabinet processing efficiency, and the smart structural design is reasonable；On the other hand, it is correspondingly provided in upper mold and is vented what core print was connected to
Exhaust passage, can be used for detecting in clamping process main sand core whether accurate positioning, improve the position stability of sand core structure.
Preferred embodiment, opening up two diameters in the water channel sand cores and the second core print boss of main sand core cooperation is 12mm
Gas vent.Gas in water channel sand cores can be introduced in main sand core by the setting of gas vent along gas sprawling direction, be vented
Area is relatively large, advanced optimizes water channel sand cores exhaust effect.
A kind of installation method of above-mentioned automobile-used cabinet sand core mounting structure, specific installation steps are as follows:
Step (a): the bending part of draw sand core lower end is bonded on main sand core using sand core bonding agent and is positioned；
And it is inserted into the first embedded groove of main sand core upper end and is positioned using the first core print boss of draw sand core upper end；Positioning
Afterwards, the distance between draw sand core core body and main sand core are 5mm；
Step (b): carrying out sliding molding for rear side mould in lower die, and lug sand is installed on metab after closing rear side mould
Core；
Step (c): cross sand core is overlapped in tap hole and molten metal overflow of uniform size is formed between tap hole
Gap；
Step (d): main sand core bonding with draw sand core in step (a) is placed on cross sand core, by main sand
Core is placed in tap hole center；
Step (e): by the recess portion of the lower ends of water channel sand cores insertion metab, and by the second core of water channel sand cores upper end
Head boss is inserted into the second embedded groove of main sand core upper end, so that water channel sand cores and main sand core and metab positioning stablity,
After positioning, the distance between water channel sand cores core body and main sand core are 5mm；
Step (f): molding, the sequence of molding are as follows: front side mould-left side mould and right side mould-upper mold recycle bolt along left side
In the cone blind hole of pin hole insertion draw sand core on mould, draw sand core and mould on the left of cabinet are positioned.
The working principle of base case of the present invention are as follows: the above-mentioned sand core installation method of application installs automobile-used cabinet sand core structure,
Since water channel sand cores and draw sand core structure complexity are elongated in sectional type sand core structure, even if its lower end positioning stablity, on
End is also easy occur the case where fracture, position of leaping up, offset in clamping process；And in the upper end of draw sand core and water channel sand cores point
It is not provided with the first core print protrusion with main the first embedded groove of sand core upper end and the second embedded groove corresponding matching and the second core print is convex
It rises, is inserted into the first embedded groove and the second embedded groove by the first core print protrusion and the second core print protrusion, on the one hand can be made respectively
It obtains draw sand core and water channel sand cores and the mutual supporting & stablizing of main sand core, positioning reliably, keeps sand core core body and main sand core spacing
For 5mm；On the other hand effectively draw sand core, water channel sand cores can be connected to main sand core, by draw sand core and water channel sand cores
The gas of generation introduces in main sand core, and mould cast type chamber, good exhaust effect is discharged by the main sand core of hollow setting.
Crucial sectional type sand core structure is during the installation process using the assembling of embedded and sand core bonding agent, and main sand core is in metal
By draw sand core and water channel sand cores positioning stablity before positioning on pedestal, installation process structure is simple, and it is convenient to position；And by lug
Sand core is located in front of metab closed on rear side of mould, rear side mould can form reliable lateral register to lug sand core；Again will in turn
Bonding main sand core is overlapped on the cross sand core in tap hole with draw sand core, carries out sand core structure group according to the sequence
Sand core structure, can easily be accurately fitted in casting die by dress, finally by water channel sand cores it is corresponding be mounted on main sand core and
On metab, plays water channel sand cores and main sand core high-precision approaches and can reach and main sand core is accurately fitted within metal bottom
Practical function on seat effectively improves the stability of sand core positioning, prevents from being easy to appear sand core fracture during molding, leap up
Situations such as position, offset.
Preferred embodiment, molding includes molding twice in the step (f), the specific steps are as follows: (1) molding for the first time be by
Sequence carries out front side mould-left side mould and the molding of right side mould, and left side mould reserves the gap 3-5mm, for observing whether sand core structure produces
Whether raw displacement/box mold molds in place, and molding recycles pin hole of the bolt on the mould of left side to be inserted into draw sand afterwards in place
It is whether accurate using preset clearance confirmation insertion position in the cone blind hole of core, check whether all sand cores are broken, position of leaping up, offset；
(2) confirm mold alignment and all sand cores are not broken, position of leaping up, deviate, then is in order that upper mold downslide molding-left side mould is complete
Full molding.Insertion whether is corresponded to along the bolt that left side die pin hole is inserted into the preset clearance observable of first time molding rear left side form
In the cone blind hole of draw sand core, on the one hand whether leap up position or offset for detecting sand core, keeps sand core structure positioning
Stability；On the other hand the stability that can effectively keep draw sand core and box mold to position by bolt, and then keeping will
Sand core overall structure such as is accurately installed in mold at the superior practical function.It can easily confirm that bolt is inserted by molding twice
Whether the position for entering draw sand core prepares, it is ensured that draw sand core will not be broken, and can also confirm that sand core structure does not occur
Leap up position, offset situations such as after molded completely again, this committed step can effectively ensure that sand core structure will not in clamping process
Accuracy that is damaged and ensuring to position between sand core structure and mold occurs, and then guarantees the certified product rate of box casting, to drop
The manufacturing cost of sand core and box casting in low cabinet casting process.
Preferred embodiment, the height of the first core print boss described in step (a) is 19mm, and the depth of first embedded groove
For 14mm.It can effectively ensure that draw sand core upper end and main sand when touching to the first core print boss and the first embedded groove bottom connection
Spacing is 5mm between core, and main sand core cavity solidification layer depth is to handle cabinet according to vehicle tail gas in 15-20mm, the design of this structure
Design, it is ensured that the installation condition that the first core print boss is inserted into main sand core is more stable, and draw sand core also may make to generate
Gas can smoothly introduce in main sand core cavity and be exhausted, improve the exhaust effect of draw sand core.
Preferred embodiment, the orientation distance between the upper and lower ends of draw sand core described in step (a) and main sand core are
340mm。
Preferred embodiment, sand core bonding agent described in step (a) are resin adhesive.It is small after being bonded using resin adhesive
Water channel sand cores and main sand core connecting portion any surface finish, intensity is larger, and harmful substance will not be generated during casting, safety
Environmental protection.
As described above, the present invention having the beneficial effect that compared with the prior art:
1. the present invention combines the split type sand core structure of cabinet with the design feature of elongated complexity, using the sand core installation side
Method may make complicated sand core structure assembling quick and accurate positioning；Sectional type sand core part is successively assembled in metab
On, it is less likely to occur linkage dislocation in assembling process, the sand core structure intensity after assembling is guaranteed, and reduces sand in clamping process
The scrappage of core entirety.
2. the upper end of draw sand core of the present invention and water channel sand cores passes through the first core print protrusion and the second core print protrusion respectively
It is inserted into the first embedded groove and the second embedded groove of main sand core and is positioned, on the one hand to support draw sand core and water channel sand
The upper end of core is positioned with main sand core, between accurately controlling between draw sand core and the core body and main sand core of water channel sand cores
Away from guaranteeing the design accuracy of mould casting, improve mould casting certified product rate；On the other hand to by draw sand core and water channel sand
Core is connected to main sand core respectively, and the gas that draw sand core and water channel sand cores generate is introduced in main sand core and is discharged, is vented
Effect is good；And the design of the first core print protrusion and the second core print protrusion also uses the design method of binder instead of tradition, mentions
Also the collapsibility of sand core is more preferable after may make casting to form while high sand core exhaust effect.
3. the first assembling draw sand core and main sand core of the present invention, and using by the way of the combination of embedded and sand core bonding agent into
Row assembling, the assembling of two system sand chipwares is simple and convenient, can effectively play water channel sand cores and main sand core high-precision close to positioning
Effect；And the present invention can play water channel sand cores and main sand using finally water channel sand cores are assembled on main sand core and metab
Core high-precision is close and can reach the practical function being accurately fitted within main sand core on metab, is conducive to improve entire
The stability of sand core positioning avoids situations such as sand core fracture, position of leaping up, offset are easy to appear during molding.
It molds 4. installation method of the present invention has, on the one hand whether leaps up position or offset for detecting sand core twice, protect
Hold the stability of sand core structure positioning；On the other hand draw sand core can be effectively kept to position with box mold by bolt steady
It is qualitative, and then the superior practical function such as keep for sand core overall structure being accurately installed in mold；It can by molding twice
Ensure that draw sand core will not be broken after molding, can also confirm sand core structure do not leap up position, offset situations such as after again
It is molded completely, this committed step can effectively ensure that breakage will not occur in clamping process and ensure sand core for sand core structure
The accuracy positioned between structure and mold, and then guarantee the certified product rate of box casting, to reduce sand core in cabinet casting process
And the manufacturing cost of box casting.
Detailed description of the invention
Fig. 1 is sand core structure assembling schematic diagram in a kind of sand core mounting structure of automobile-used cabinet of the present invention；
Fig. 2 is the perspective view of the explosion of Fig. 1；
Fig. 3 is a kind of elevational cross-sectional view of the sand core mounting structure molding of automobile-used cabinet of the present invention；
Fig. 4 is a kind of side view cutaway drawing of the sand core mounting structure molding of automobile-used cabinet of the present invention.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: 1- upper mold, the front side 2- mould, 3- rear side mould, the left side 4- mould, the right side 5-
Mould, 6- lower die, 7- metab, 8- tap hole, the main sand core of 9-, 10- water channel sand cores, the second core print of 101- protrusion, 11- draw
Sand core, 111- bending part, the first core print of 112- protrusion, 12- cross sand core, 13- lug sand core, 14- recess portion, 15- exhaust core print,
16- gas vent, 17- bore blind hole, 18- pin hole, 19- exhaust passage, 22- bolt.
Embodiment 1
Shown in please refer to figs. 1 to 4, the present embodiment provides a kind of sand core mounting structures of automobile-used cabinet, including box body formwork
Upper mold 1, front side mould 2, rear side mould 3, left side mould 4, right side mould 5, lower die 6 and the metab 7 being arranged in lower die 6 of tool,
Metab 7 is equipped with tap hole 8, and the material of metab 7 is high temperature high voltage resistant metalwork, preferably H13 mould steel, knot
Structure intensity is high, can stablize and support other sand mold parts, and relatively traditional sand mold pedestal has better stability of strutting system, and is not susceptible to
Aluminum water long-time high temperature, which washes away, leads to the caducous situation of pedestal sand.
Incorporated by reference to shown in Fig. 1 and Fig. 2, sand core structure includes main sand core 9, water channel sand cores 10, draw sand core 11, cross sand
The lower end of core 12 and lug sand core 13, draw sand core 11 is equipped with bending part 111, to be embedded in main 9 lower end of sand core, to support
11 lower end of draw sand core is positioned with main sand core 9；And the upper end of draw sand core 11 is equipped with the first core print protrusion 112, it is main
Sand core 9 is equipped with the first embedded groove with raised 112 corresponding matchings of the first core print, and the first core is right against on draw sand core 11
The left side of head boss is equipped with cone blind hole 17, and left side mould 4 is equipped with the pin hole 18 with cone 17 corresponding matching of blind hole；To lead to after molding
It crosses in the insertion cone blind hole 17 of bolt 22,11 upper end of draw sand core easy to support is positioned with metal die；And in cone blind hole
17 bottom is equipped with metal mold limited block, avoids generating friction drop with cone 17 bottom of blind hole in the insertion cone blind hole 17 of bolt 22
Phenomenon generate positioning and loosen influencing product quality.To be operated convenient for the lower core of 11 first core print of draw sand core protrusion 112,
The axial cross section of first core print protrusion 112 is designed into stepped cross, and the diameter of raised 112 cross sections of the first core print is along its insertion
Main 9 side of sand core is gradually successively decreased, and is not only convenient for lower core positioning accuracy height, and the structure of corner angle seamed edge is not present, is not easy to collide with
Sand, practicability are good.
It is overlapped on 8 upper end of tap hole in cross sand core 12, is equipped with round boss, main sand core 9 in the upper end of cross sand core 12
Bottom be equipped with the groove that cooperate with round boss, cross sand core 12 by the groove that round boss is inserted into main sand core 9 it is interior and its
It is positioned.
The upper end of water channel sand cores 10 is equipped with the second core print protrusion 101 that bottom surface is rectangle, and main sand core 9 is equipped with and second
Second embedded groove of 101 cooperation of core print protrusion, metab 7 is equipped with the recess portion 14 that feeding conduit sand core 10 is inserted into, to water
Sand core 10 lower end in road is positioned, and is held with 10 core of water channel sand cores through the second embedding of the 101 main sand core 9 of insertion of the second core print protrusion
Enter in slot and positioned, the second core print protrusion 101 is along the 10 perpendicular bending of core body of water channel sand cores, the second core print vertically bent
The boss structure that protrusion 101 is rectangle for bottom surface.
The upper end of water channel sand cores 10 is set there are two along the vertically extending exhaust core print 15 in 1 direction of upper mold, two exhaust core prints
15 are connected to the exhaust passage 19 in upper mold 1, and the design of exhaust core print 15 is effectively for casting type top of chamber box flange disk
Special construction design, the gas that can effectively generate water channel sand cores 10 extraction type chamber rapidly can reach filling after the completion of type
The effect being vented rapidly advanced optimizes casting exhaust system of cavity.And two exhaust core prints 15 and casting type are intracavitary to be formed
Box flange disk reserve tapping fabrication hole position it is corresponding, and each exhaust core print 15 is cylindric, and exhaust core print
15 size is adapted with the size of the threaded hole of box flange disk, and then the design for being vented core print 15 not only can effectively avoid casting
The special construction design of part type top of chamber box flange disk leads to the problem of 1 exhaust passage of upper mold, 19 exhaust effect difference, instead may be used
Reserved tapping technique compatible with the size of the threaded hole of box flange disk is effectively directly formed on molding ring flange
Hole can effectively reduce box flange disk later period drilling operating, be convenient for tapping, can effectively improve while improving cabinet processing quality
Cabinet processing efficiency, the smart structural design are reasonable.
Importantly, the exhaust passage 19 being connected to exhaust core print 15 is correspondingly provided in upper mold 1, it can in clamping process
For detect main sand core 9 whether accurate positioning, improve the position stability of sand core structure.
The gas vent that two diameters are 12mm is opened up on cooperation the second core print boss of water channel sand cores 10 and main sand core 9
16, the gas in water channel sand cores 10 can be introduced in main sand core 9 by the setting of gas vent along gas sprawling direction, leaving area
It is relatively large, 10 exhaust effect of water channel sand cores can be advanced optimized.
It is equipped with the cavity being connected to 1 exhaust passage 19 of upper mold in main sand core 9, main sand core 9 can be drawn in the production process
Sky, the rectangle that the cross section of main sand core 9 is about 100mm × 122mm, main sand core 9 solidify layer depth in 15-20mm, with main sand
9 center line of core, cross-sectional area are soft without cured in the sand of 80mm × 100mm, can be emptied.
In above-mentioned sand core mounting structure, the part different from existing structure is mainly sand core, mold and driving mould
The mobile driving mechanism of tool is the prior art, to not repeat.
A specific embodiment of the invention are as follows: above-mentioned sand core mounting structure is applied to the installation of automobile-used cabinet sand core, by
That structure is complicated is elongated for water channel sand cores 10 and draw sand core 11 in sectional type sand core structure, even if its lower end positioning stablity,
Upper end is also easy occur the case where fracture, position of leaping up, offset in clamping process；And in draw sand core 11 and water channel sand cores 10
Upper end be respectively arranged with main 9 the first embedded groove of upper end of sand core and the first core print of the second embedded groove corresponding matching protrusion 112 and
Second core print protrusion 101 is inserted into the first embedded groove and second by the first core print protrusion 112 and the second core print protrusion 101 respectively
In embedded groove, draw sand core 11 and water channel sand cores 10 and the mutual supporting & stablizing of main sand core 9, positioning on the one hand may make reliably,
It keeps sand core core body and main 9 spacing of sand core is 5mm；It on the other hand can be effectively by draw sand core 11, water channel sand cores 10 and main sand
Core 9 is connected to, and the gas that draw sand core 11 and water channel sand cores 10 are generated introduces in main sand core 9, and passes through the master of hollow setting
Mould cast type chamber is discharged in sand core 9, and good exhaust effect, it is complete that cabinet fills type, there is no bleb, owes casting or profile is unintelligible
The defects of.
Sand core is molded after installing, and is inserted into draw sand core 11 by pin hole 18 of the bolt 22 on left side mould 4
Cone blind hole 17 in, check whether all sand cores are broken, position of leaping up, offset, between cooperation of the molten aluminum through cross sand core 12 and tap hole 8
Gap is injected into that type is intracavitary, and positioning base is made of metal from lower to upper, and 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 cause pedestal sand easy
The case where falling off.
Embodiment 2
The present embodiment provides a kind of installation method of above-mentioned automobile-used cabinet sand core mounting structure, specific installation steps are as follows:
Step (a): it is enterprising that the bending part 111 of 11 lower end of draw sand core is bonded in main sand core 9 using resin adhesive
Row positioning；And it is inserted into the first embedded groove of main 9 upper end of sand core and is carried out using the first core print boss of 11 upper end of draw sand core
Positioning；The height of first core print boss is 19mm, and the depth of the first embedded groove is 14mm, to can effectively ensure that after positioning
The distance between 11 core body of draw sand core and main sand core 9 are 5mm；And upper and lower ends between draw sand core 11 and main sand core 9
Two orientation distances be 340mm；The design of this structure is to handle cabinet design according to vehicle tail gas, it is ensured that the first core print boss
The installation condition being inserted into main sand core 9 is more stable, and the gas that also may make draw sand core 11 to generate can smoothly introduce main sand
It is exhausted in 9 cavity of core, improves the exhaust effect of draw sand core 11.
Step (b): rear side mould 3 is subjected to sliding molding in lower die 6, installs and takes on metab 7 after conjunction rear side mould 3
Sub- sand core 13, the rear side mould 3 after molding can form reliable lateral register to lug sand core 13；
Step (c): cross sand core 12 is overlapped in tap hole 8 and molten metal of uniform size is formed between tap hole 8
Overflow gap, the round boss of cross sand core 12 are placed in the center of tap hole 8 upward；
Step (d): main sand core 9 bonding with draw sand core 11 in step (a) is placed on cross sand core 12, benefit
The groove and the round boss location fit on cross sand core 12 being arranged with the bottom of main sand core 9, are placed in tap hole for main sand core 9
8 centers；
Step (e): by the recess portion 14 of the lower ends of water channel sand cores 10 insertion metab 7, and by 10 upper end of water channel sand cores
The second core print boss be inserted into the second embedded groove of main 9 upper end of sand core so that water channel sand cores 10 and main sand core 9 and metal bottom
7 positioning stablities of seat, after positioning, the distance between 10 core body of water channel sand cores and main sand core 9 are 5mm；
Step (f): molding, including mold twice, the specific steps are as follows: (1) molding for the first time is to carry out front side in order
Mould 4 and right side mould 5 mold on the left of mould 2-, and left side mould 4 reserves the gap 3-5mm, for observing whether sand core structure generates displacement/case
Whether mould molds in place, and molding recycles pin hole 18 of the bolt 22 on left side mould 4 to be inserted into draw sand core 11 afterwards in place
Cone blind hole 17 in, using preset clearance confirmation insertion position it is whether accurate, check whether all sand cores are broken, position of leaping up, offset；
(2) confirm mold alignment and all sand cores are not broken, position of leaping up, deviate, then in order by 1 downslide molding of upper mold-left side mould 4
Molding completely.Two exhausts of preset clearance confirmation 10 upper end of water channel sand cores can be further utilized in 1 downslide clamping process of upper mold
Core print 15 whether along upper mold 1 exhaust passage 19 be inserted into, exhaust core print 15 it is corresponding with exhaust passage 19 accurately after carry out again on the left of
Mould 4 molds completely, completes sand core installation.
The bolt 22 that the preset clearance observable of first time molding rear left side form 4 is inserted into along 4 pin hole 18 of left side mould whether
In the cone blind hole 17 of corresponding insertion draw sand core 11, on the one hand whether leaps up position or offset for detecting sand core, keep sand
The stability of cored structure positioning；On the other hand draw sand core 11 can be effectively kept to position with box mold by bolt 22 steady
It is qualitative, and then the superior practical function such as keep for sand core overall structure being accurately installed in mold.It can by molding twice
Whether the position that easily confirmation bolt 22 is inserted into draw sand core 11 prepares, it is ensured that and draw sand core 11 will not be broken,
Can also confirm sand core structure do not leap up position, offset situations such as after molded completely again, this committed step can effectively ensure that sand
The accuracy that cored structure will not occur breakage in clamping process and ensure to position between sand core structure and mold, and then guard box
The certified product rate of body casting, to reduce the manufacturing cost of sand core and box casting in cabinet casting process.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, patent protection model of the invention
It encloses and is subject to claims, it is all to change with equivalent structure made by specification and accompanying drawing content of the invention, similarly
It should be included within the scope of the present invention.
Claims (8)
1. a kind of sand core mounting structure of automobile-used cabinet, it is characterised in that: upper mold, front side mould, rear side mould including box mold,
Left side mould, right side mould, lower die and the metab being arranged in lower die, the metab are equipped with tap hole, sand core knot
Structure includes main sand core, water channel sand cores, draw sand core, cross sand core and lug sand core, and the lower end of the draw sand core is equipped with
Bending part, and the upper end of draw sand core is equipped with the first core print protrusion of the trapezoidal shape of axial cross section, the main sand core is equipped with
With the first embedded groove of the first core print protrusion corresponding matching, the side that the first core print boss is right against on draw sand core is equipped with
Blind hole is bored, the left side mould is equipped with the pin hole with cone blind hole corresponding matching；The upper end of the water channel sand cores is equipped with bottom surface in length
Rectangular the second core print protrusion, the main sand core are equipped with the second embedded groove with the second core print male cooperation, the metal bottom
Seat is equipped with the recess portion of feeding conduit sand core insertion, is equipped with the cavity being connected to upper mold exhaust passage in the main sand core.
2. a kind of sand core mounting structure of automobile-used cabinet according to claim 1, it is characterised in that: the water channel sand cores
Upper end is set there are two along the vertically extending exhaust core print in upper mold direction, and two exhaust core prints connect with the exhaust passage in upper mold
It is logical.
3. a kind of sand core mounting structure of automobile-used cabinet according to claim 2, it is characterised in that: in the water channel sand cores
The gas vent that two diameters are 12mm is opened up on the second core print boss of main sand core cooperation.
4. a kind of sand core installation method of automobile-used cabinet, it is characterised in that: specific installation steps are as follows:
Step (a): the bending part of draw sand core lower end is bonded on main sand core using sand core bonding agent and is positioned；And benefit
It is inserted into the first embedded groove of main sand core upper end and is positioned with the first core print boss of draw sand core upper end；It is small after positioning
The distance between water channel sand cores core body and main sand core are 5mm；
Step (b): carrying out sliding molding for rear side mould in lower die, and lug sand core is installed on metab after closing rear side mould；
Step (c): cross sand core is overlapped in tap hole and molten metal overflow of uniform size gap is formed between tap hole；
Step (d): main sand core bonding with draw sand core in step (a) is placed on cross sand core, main sand core is set
In tap hole center；
Step (e): the lower end of water channel sand cores is inserted into the recess portion of metab, and the second core print of water channel sand cores upper end is convex
Platform is inserted into the second embedded groove of main sand core upper end, so that water channel sand cores and main sand core and metab positioning stablity, positioning
Afterwards, the distance between water channel sand cores core body and main sand core are 5mm；
Step (f): molding, the sequence of molding are as follows: front side mould-left side mould and right side mould-upper mold recycle bolt along the mould of left side
Pin hole insertion draw sand core cone blind hole in, to draw sand core and cabinet left side mould position.
5. a kind of sand core installation method of automobile-used cabinet according to claim 4, it is characterised in that: in the step (f)
Molding includes molding twice, the specific steps are as follows: (1) molding for the first time is to carry out front side mould-left side mould and right side mould in order
Molding, left side mould reserve the gap 3-5mm, whether generate whether displacement/box mold molds in place for observing sand core structure, close
Mould recycles afterwards in place in the cone blind hole of pin hole insertion draw sand core of the bolt on the mould of left side, is confirmed using preset clearance and is inserted
Whether accurate enter position, checks whether all sand cores are broken, position of leaping up, offset；(2) confirm mold alignment and all sand cores do not occur
It is broken, position of leaping up, offset, then in order molds upper mold downslide molding-left side mould completely.
6. a kind of sand core installation method of automobile-used cabinet according to claim 4, it is characterised in that: described in step (a)
The height of first core print boss is 19mm, and the depth of first embedded groove is 14mm.
7. a kind of sand core installation method of automobile-used cabinet according to claim 4, it is characterised in that: described in step (a)
Orientation distance between draw sand core upper and lower ends and main sand core is 340mm.
8. a kind of sand core installation method of automobile-used cabinet according to claim 4, it is characterised in that: described in step (a)
Sand core bonding agent is resin adhesive.
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| CN201811217867.7A CN109332597B (en) | 2018-10-18 | 2018-10-18 | Sand core mounting structure of vehicle box body and mounting method thereof |
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| CN201811217867.7A CN109332597B (en) | 2018-10-18 | 2018-10-18 | Sand core mounting structure of vehicle box body and mounting method thereof |
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| CN109332597B (en) | 2020-04-28 |
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