CN102784887B - Lost foam casting die of transmission gear box body of heavy truck - Google Patents

Lost foam casting die of transmission gear box body of heavy truck Download PDF

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Publication number
CN102784887B
CN102784887B CN201210304343.8A CN201210304343A CN102784887B CN 102784887 B CN102784887 B CN 102784887B CN 201210304343 A CN201210304343 A CN 201210304343A CN 102784887 B CN102784887 B CN 102784887B
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CN
China
Prior art keywords
patrix
counterdie
mold insert
air chamber
core
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CN201210304343.8A
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Chinese (zh)
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CN102784887A (en
Inventor
刘中华
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洛阳刘氏模具有限公司
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Priority to CN201210304343.8A priority Critical patent/CN102784887B/en
Publication of CN102784887A publication Critical patent/CN102784887A/en
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Publication of CN102784887B publication Critical patent/CN102784887B/en

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Abstract

The invention belongs to the technical field of dies and discloses a lost foam casting die of a transmission gear box body of a heavy truck. The lost foam casting die of the transmission gear box body of the heavy truck comprises an upper die and a lower die, wherein the upper die has an upper die air chamber (1); the lower die has a lower die air chamber (3); the cavity of the upper die air chamber (1) is provided with a reversely buckled upper die side core pulling insert (6) for molding an outer side surface of the transmission gear box body of the heavy truck as well as an upper die insert I (7) and an upper die insert II (13) which are used for molding two end faces of the transmission gear box body of the heavy truck; and the lower die air chamber comprises a lower die insert I (15) and a lower die insert II (21) which are used for molding an inner cavity surface of the transmission gear box body, a lower die side core pulling insert (20) for molding a partition board in middle of the transmission gear box body of the heavy truck, and a partially reversely buckled lower die side core pulling insert I (19) for molding the inner cavity of the lower die air chamber; and the lower die air chamber is further provided with an automatic ejecting mechanism in a foam shape. The die structure disclosed by the invention can ensure the steady molding and hard deformation of the foam shape, and also ensures smooth demolding of the foam shape.

Description

The evaporative pattern mold of heavy type lorry transmission-gear box casing
Technical field
The invention belongs to technical field of mold, mainly propose a kind of evaporative pattern mold of heavy card gear box.
Background technology
The product that heavily blocks gear box mainly contains the requirement aspect four on market:
First: production lot amount is large.
Second: presentation quality is good.
The the 3rd: casting accuracy is high.
The the 4th: weight good stability.
Lost foam casting process can meet the above market demands that heavily block gear box, and the product that still heavily blocks gear box has following seven problems to need to solve, the product structure schematic diagram as shown in Fig. 1-Fig. 6:
One: wall thickness 8mm, Foam Pattern is easy-formation not; Two: there is dividing plate centre, porose in the middle of dividing plate, need to do side core-pulling mold insert; Three: two sides opening, Foam Pattern is yielding; Four: product cavity space is large, and Foam Pattern is difficult for the demoulding; Five: four sides sealing, product needed is divided 2 bonding combination formings; Six: divide the local back-off that produces of product of 2, mould need to be made side core-pulling mold insert, seven: the axiality of the dead eye of the dead eye of central dividing plate and an end face must guarantee.
Summary of the invention
For addressing the above problem, the object of the invention is to propose a kind of evaporative pattern mold of heavy card gear box.
The present invention takes following technical proposals to realize its goal of the invention:
An evaporative pattern mold for heavy card gear box, described evaporative pattern mold is two covers that structure is identical; Described evaporative pattern mold includes upper die and lower die; Described patrix has patrix air chamber, the cuboid that described patrix air chamber is internal cavities; Described counterdie has counterdie air chamber, the cuboid that described counterdie air chamber is internal cavities; Described patrix air chamber and counterdie air chamber are when patrix and counterdie closure, and the cavity between patrix air chamber and counterdie air chamber forms mold cavity; In the die cavity of described patrix air chamber, be provided with the patrix side core-pulling mold insert that heavily blocks gear box lateral surface back-off in order to moulding; Corresponding described patrix side core-pulling mold insert arranges the patrix cylinder of loosing core, and the described patrix cylinder of loosing core is positioned on the outer side surface of patrix air chamber;
Corresponding described patrix side core-pulling mold insert is provided with the patrix side core-pulling mold insert guiding mechanism playing the guiding role in folding mold process; Described patrix side core-pulling mold insert guiding mechanism includes copper dovetail and dovetail groove, and described copper dovetail is positioned at the upper end face of patrix side core-pulling mold insert, by CARBURIZING FURNACE FOR STAINLESS FASTENER, is fixed on patrix air chamber inner chamber, coordinates with dovetail groove fixing on patrix side core-pulling mold insert; Described dovetail groove is fixed on the upper end face of patrix side core-pulling mold insert;
Corresponding described patrix side core-pulling mold insert is provided with patrix side core-pulling mold insert detent mechanism, and described patrix side core-pulling mold insert detent mechanism consists of the locating slot on positioning boss and patrix air chamber on patrix side core-pulling mold insert; The bottom surface of patrix side core-pulling mold insert is provided with location-plate simultaneously;
Described patrix side core-pulling mold insert is hollow-core construction; The patrix air chamber side corresponding with patrix side core-pulling mold insert is reserved with vapours through hole and cooling water through hole, the forming surface of patrix side core-pulling mold insert, by the vent plug of inlaying on it, vapours through hole and the cooling water through hole of patrix air chamber, communicates with patrix air chamber inner chamber;
Described patrix air chamber has patrix mold insert I, the patrix mold insert II that moulding heavily blocks gear box both ends of the surface, and described patrix mold insert I, patrix mold insert II lays respectively on two corresponding internal faces of patrix air chamber inner chamber, and fixes by CARBURIZING FURNACE FOR STAINLESS FASTENER; Described patrix mold insert I, patrix mold insert II are hollow structure; Described patrix air chamber is connected with mold cavity by the vent plug inlayed in patrix mold insert I, patrix mold insert II and the preformed hole of patrix air chamber;
Described patrix air chamber has three locating slots, has three locating dowels that coordinate with the locating slot having on patrix air chamber on described counterdie air chamber; The detent mechanism that the locating dowel having on the locating slot having on patrix air chamber and counterdie air chamber plays the role of positioning while being jointly formed in evaporative pattern mold matched moulds;
Described counterdie air chamber has for the counterdie mold insert I of the surface of internal cavity of moulding gear box, counterdie mold insert II, and described counterdie mold insert I, counterdie mold insert II are hollow structure, are positioned in the middle of counterdie air chamber; The faying face of counterdie air chamber and counterdie mold insert I, counterdie mold insert II has the mosaic groove of counterdie mold insert I, counterdie mold insert II, on the groove wall of counterdie air chamber and counterdie mold insert I, counterdie mold insert II faying face, there is steam hole through hole and cooling water through hole, counterdie mold insert I, counterdie mold insert II forming surface are inlaid with vent plug, and mold cavity and counterdie air chamber are communicated;
Described counterdie air chamber has moulding and heavily blocks the counterdie side core-pulling mold insert II of gear box central dividing plate and the counterdie side core-pulling mold insert I of the local back-off of molding cavity; Described counterdie side core-pulling mold insert I and counterdie side core-pulling mold insert II are two; Described counterdie side core-pulling mold insert I and counterdie side core-pulling mold insert II are hollow structure; Reserved vapours through hole and cooling water through hole on the counterdie air chamber corresponding with counterdie side core-pulling mold insert I, counterdie side core-pulling mold insert II.
Described counterdie air chamber has the automatic ejecting mechanism of Foam Pattern, and described automatic ejecting mechanism comprises top board, push rod, ejects cylinder; Described top board is positioned at the die joint place of counterdie air chamber, along the surrounding setting of counterdie mold insert I, counterdie mold insert II, in the groove between counterdie air chamber and counterdie mold insert I, counterdie mold insert II, under four drives that eject cylinder, moves reciprocatingly; The through hole of reserved vapours through hole and cooling water in the groove of counterdie air chamber; Reserved vapours through hole and cooling water through hole in the middle of described top board; Described top board and ejecting between cylinder by being threaded togather on four connecting rods, four connecting rods are positioned at top board and eject in the middle of cylinder, and four connecting rods are simultaneously through the copper guide pin bushing that is fixed on counterdie air chamber, and described copper guide pin bushing is corresponding with connecting rod, have four, complete the guiding to location-plate; Described push rod is stressed according to Foam Pattern, is placed with 7 and is fixed on top board, completes the knockout course of Foam Pattern together with top board; Described four eject cylinder and are fixed on counterdie air chamber inner chamber by CARBURIZING FURNACE FOR STAINLESS FASTENER, eject the piston movement direction of cylinder by adjustment, complete the opening and closing movement of top board and push rod.
The location of described automatic ejecting mechanism and the spacing positioning boss carrying above by top board are realized.
The upper surface of described patrix air chamber as with the contact-making surface of forming machine, the upper surface of described patrix air chamber is inlaid with the patrix sealing strip sealing in order between patrix air chamber and forming machine template.
The upper surface of described counterdie air chamber is as die joint, is inlaid with the counterdie die joint sealing strip in order to play buffering and sealing function when the upper and lower mould matched moulds on the die joint of described counterdie air chamber.
The lower surface of described counterdie air chamber as with the contact-making surface of forming machine, on the lower surface of described counterdie air chamber, be inlaid with the counterdie sealing strip sealing in order between counterdie air chamber and forming machine template.
The outside of described patrix air chamber is fixed with automatic spray gun; The lower end of described automatic spray gun through the cavity of patrix air chamber, be inserted into mold cavity.
The evaporative pattern mold of a kind of heavy card gear box that the present invention proposes, can improve stability and the intensity of Foam Pattern moulding, and can greatly improve the shaping efficiency of Foam Pattern, reduces operator's labour intensity; Gear box actinal surface does two pass lacing wire, prevents that Foam Pattern is because opening is excessive, and intensity is too low, and causes the distortion of Foam Pattern, guarantees the stability of the size of Foam Pattern actinal surface moulding; Particularly Foam Pattern adopts the technique of automatic ejection, make Foam Pattern stressed even in knockout course, keep synchronous, can be good at guaranteeing the working strength of Foam Pattern, and can further improve the shaping efficiency of Foam Pattern, reduce workman's labour intensity, the uniformity of gear box moulding is improved significantly, and then guarantee casting dimension accuracy and serviceability, guarantee the axiality of the dead eye of central dividing plate and the dead eye of end face simultaneously; Adopt automatic spray gun negative pressure to fill material, can guarantee the uniformity of Foam Pattern moulding, make 8 millimeters of wall thickness also very easily be full of die cavity; In sum, mould of the present invention can be good at solving the problem in the Foam Pattern forming process of heavy type lorry transmission-gear box casing, thereby make heavy type lorry transmission-gear box casing adopt evaporative pattern cast also to become possibility, and also more and more meet development and the demand in market.
Accompanying drawing explanation
Fig. 1-Fig. 6 is the structural representation of heavy truck gear box.
Fig. 7 is structural representation of the present invention.
Fig. 8 is the structural representation of patrix in the present invention.
Fig. 9 is the structural representation of counterdie in the present invention.
Figure 10 is die opening state schematic diagram of the present invention.
Figure 11 is patrix die opening state schematic diagram in the present invention.
Figure 12 is the schematic diagram that shows copper dovetail position in the present invention.
Figure 13 is patrix side core-pulling mold insert schematic diagram in the present invention.
Figure 14 is counterdie die opening state schematic diagram of the present invention.
Figure 15 is counterdie schematic bottom view in the present invention.
In figure: 1, patrix air chamber, 2, patrix sealing strip, 3, counterdie air chamber, 4, the patrix cylinder of loosing core, 5, location-plate 6, patrix side core-pulling mold insert, 7, patrix mold insert I, 8, locating slot, 9, patrix, 10, counterdie, 11, copper dovetail, 12, dovetail groove, 13, patrix mold insert II, 14, heavy type lorry transmission-gear box casing Foam Pattern, 15, counterdie mold insert I, 16, top board, 17, locating dowel, 18, push rod, 19, counterdie side core-pulling mold insert I, 20, counterdie side core-pulling mold insert II, 21, counterdie mold insert II, 22, counterdie die joint sealing strip, 23, counterdie sealing strip, 24, eject cylinder.
The specific embodiment
With specific embodiment, the present invention is illustrated by reference to the accompanying drawings:
As shown in Figure 7 and in conjunction with Fig. 8, Fig. 9, Figure 10, Figure 11, a kind of automatic evaporative pattern mold of heavy card gear box, described evaporative pattern mold includes patrix 9 and counterdie 10; Described patrix has patrix air chamber 1, the cuboid that described patrix air chamber 1 is internal cavities; Described counterdie 10 has counterdie air chamber 3, the cuboid that described counterdie air chamber 3 is internal cavities; Described patrix air chamber 1 and counterdie air chamber 3 are when patrix 9 and counterdie 10 are closed, and between patrix air chamber 1 and counterdie air chamber 3, the cavity of contact does not form the space apperance of heavily blocking gear box, i.e. mold cavity; In the die cavity of patrix air chamber 1, be provided with the patrix side core-pulling mold insert 6 that heavily blocks gear box lateral surface back-off in order to moulding; Described patrix side core-pulling mold insert 6 slides at patrix air chamber 1 inner chamber under patrix is loosed core the drive of cylinder 4; The described patrix cylinder 4 of loosing core is positioned on the outer side surface of patrix air chamber 1, fixes, and loose core and inlay sealing plate between cylinder 4 and patrix air chamber 1 at patrix by CARBURIZING FURNACE FOR STAINLESS FASTENER; Described patrix side core-pulling mold insert 6 is under patrix is loosed core the effect of cylinder 4, to the central motion of patrix air chamber 1 die cavity, complete the matched moulds process of patrix side core-pulling mold insert 6, or the motion done away from patrix air chamber 1 die cavity center of described patrix side core-pulling mold insert 6, complete the die sinking process of patrix side core-pulling mold insert 6; Corresponding described patrix side core-pulling mold insert 6 is provided with the patrix side core-pulling mold insert guiding mechanism playing the guiding role at folding mold process.
In conjunction with Fig. 8 and Figure 12, described patrix side core-pulling mold insert guiding mechanism includes copper dovetail 11 and dovetail groove 12, copper dovetail 11 is positioned at the upper end face of patrix side core-pulling mold insert 6, by CARBURIZING FURNACE FOR STAINLESS FASTENER, be fixed on patrix air chamber 1 inner chamber, the dovetail groove 12 fixing with patrix side core-pulling mold insert 6 is used in conjunction with, and dovetail groove 12 is fixed on the upper end face of patrix side core-pulling mold insert 6; Described patrix side core-pulling mold insert 6 is provided with detent mechanism, and patrix side core-pulling mold insert detent mechanism consists of the locating slot on positioning boss and patrix air chamber 1 on patrix side core-pulling mold insert 6; The bottom surface of patrix side core-pulling mold insert 6 is provided with location-plate 5 simultaneously, and patrix side core-pulling mold insert 6 is implemented to location protective effect, makes the inner chamber motion of patrix side core-pulling mold insert 6 in sealing; Make the loose core piston center of cylinder 4 of patrix corresponding with the center of patrix side core-pulling mold insert 6 simultaneously, guarantee the closing precision of opening of patrix side core-pulling mold insert 6, guarantee heavily to block the presentation quality of gear box Foam Pattern 14.
In conjunction with Fig. 8 and Figure 11, described patrix side core-pulling mold insert 6 is hollow-core construction; Vapours through hole and cooling water through hole are left in patrix air chamber 1 side corresponding with it, the forming surface of patrix side core-pulling mold insert 6 is by the vent plug inlayed on it and vapours through hole, the cooling water through hole of patrix air chamber 1, communicate with patrix air chamber 1 inner chamber, guarantee patrix side core-pulling mold insert 6 molded surfaces throughput.
In conjunction with Fig. 8 and Figure 11, described patrix air chamber 1 has patrix mold insert I 7 and the patrix mold insert II 13 that moulding heavily blocks gear box both ends of the surface, described patrix mold insert I 7 is positioned on the internal face of the corresponding both sides of patrix air chamber inner chamber with patrix mold insert II 13, the vertical setting of die joint with patrix air chamber 1, guarantee heavily to block the depth of parallelism of gear box both ends of the surface, and by CARBURIZING FURNACE FOR STAINLESS FASTENER, fix, described patrix mold insert I 7 and patrix mold insert II 13 are hollow structure; Described patrix air chamber 1 is connected with mold cavity by the vent plug inlayed in patrix mold insert I 7 and patrix mold insert II 13 and the preformed hole of patrix air chamber 1, guarantees the throughput of patrix mold insert I 7 and patrix mold insert II 13 molded surfaces.
In conjunction with Fig. 8, Figure 14, the triangle of described patrix air chamber 1 has three locating slots 8, has three locating dowels 17 that coordinate with the locating slot 8 having on patrix air chamber 1 on described counterdie air chamber 3; The detent mechanism that the locating dowel 17 having on the locating slot 8 having on patrix air chamber 1 and counterdie air chamber 3 plays the role of positioning while being jointly formed in evaporative pattern mold matched moulds, three locating slots and three not decile settings of locating dowel 1, prevent mould installation dislocation, guarantee the formed precision of heavy type lorry transmission-gear box casing Foam Pattern 14.
In conjunction with Figure 14, described counterdie air chamber 3 has the counterdie mold insert I 15 and the counterdie mold insert II 21 that are fixed on counterdie air chamber 3, described counterdie mold insert I 15 and counterdie mold insert II 21 are hollow structure, are positioned in the middle of counterdie air chamber 3, for the surface of internal cavity of moulding gear box; The faying face of counterdie air chamber 3 and counterdie mold insert I 15 and counterdie mold insert II 21 has the mosaic groove of counterdie mold insert I 15 and counterdie mold insert II 21, on the groove surface of counterdie air chamber 3 and counterdie mold insert I 15 and counterdie mold insert II 21 faying faces, there is steam through hole and cooling water through hole, counterdie mold insert I 15 and counterdie mold insert II 21 forming surface are inlaid with vent plug, mold cavity and counterdie air chamber 3 inner chambers are communicated, guarantee the throughput at counterdie mold insert I 15 and counterdie mold insert II 21 moulding positions.
In conjunction with Figure 14, described counterdie air chamber 3 has moulding and heavily blocks the counterdie side core-pulling mold insert II 20 of gear box central dividing plate and the counterdie side core-pulling mold insert I 19 of the local back-off of molding cavity, described counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 are positioned at the molded surface of counterdie mold insert I 15 and counterdie mold insert II 21, and the dovetail groove carrying by the dovetail that carries and counterdie mold insert I 15, counterdie mold insert II 21 is used in conjunction with; Described counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 are hollow structure, and contact with 21 3 of counterdie mold insert II with counterdie mold insert I 15, at counterdie mold insert I 15 and 21 3 reserved vapours of counterdie mold insert II and cooling water through hole, described counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 forming surface are inlayed vent plug, by the reserved vapours through hole of counterdie air chamber 3 and cooling water through hole, communicate with the inner chamber of counterdie air chamber 3, guarantee the throughput at counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 moulding positions.
In conjunction with Figure 14, described counterdie air chamber 3 has the automatic ejecting mechanism of heavy type lorry transmission-gear box casing Foam Pattern, described automatic ejecting mechanism comprises top board 16, push rod 18, eject cylinder 24, described top board 16 is at the die joint place of counterdie air chamber 3, border along counterdie mold insert I 15 and counterdie mold insert II 21 arranges, and and the contact-making surface between counterdie air chamber 3 and counterdie mold insert I 15 and counterdie mold insert II 21 leaves 0.2mm gap, in groove between counterdie air chamber 3 and counterdie mold insert I 15 and counterdie mold insert II 21, the through hole of reserved vapours and cooling water in the groove of counterdie air chamber 3, reserved vapours and cooling water through hole in the middle of described top board 16, be conducive to the molded surface that the vapours of counterdie air chamber 3 inner chambers and cooling water reach counterdie mold insert I 15 and counterdie mold insert II 21.
Described top board 16 and ejecting between cylinder 24 by being threaded togather on four connecting rods, four connecting rods are positioned at top board 16 and eject in the middle of cylinder 24, four connecting rods are simultaneously through the copper guide pin bushing that is fixed on counterdie air chamber 3, described copper guide pin bushing is corresponding with connecting rod, have four, complete the guiding to top board 16, four eject cylinder and are fixed on counterdie air chamber 3 inner chambers by CARBURIZING FURNACE FOR STAINLESS FASTENER, described top board 16 under four drives that eject cylinder along the die joint of counterdie air chamber 3, do perpendicular to die joint motion upwards, 25mm moves upward, complete ejecting in advance of heavy type lorry transmission-gear box casing Foam Pattern 14, make heavy type lorry transmission-gear box casing Foam Pattern 14 realize automatic demoulding, also completed ejecting in advance of counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 simultaneously, counterdie side core-pulling mold insert I 19 and counterdie side core-pulling mold insert II 20 and counterdie mold insert I 15 and counterdie mold insert II 21 are also departed from advance, more can guarantee the stability of heavy type lorry transmission-gear box casing Foam Pattern 14 moulding, described top board 16 along the die joint of counterdie air chamber 3, does perpendicular to the prone motion of somatotype under four drives that eject cylinder, makes top board 16 returns, completes an automatic demoulding process of heavy type lorry transmission-gear box casing Foam Pattern 14, four eject cylinder and act on top board 16 simultaneously, guarantee top board 16 motions steadily, stressed evenly.
Described push rod 18 is 7, according to the demoulding force part of Foam Pattern 14, by stainless steel bolt, be fixed on top board 16, push rod 18 is consistent with top board 16 directions of motion, assistant ceiling 16 completes the automatic demoulding of heavy type lorry transmission-gear box casing Foam Pattern 14, more can guarantee heavy type lorry transmission-gear box casing Foam Pattern sticking to mould, indeformable not in knockout course.
The location of described automatic ejecting mechanism and spacingly comprise two aspects: the location of top board 16 and spacing, the location of push rod 18 and spacing; The locating slot carrying of the location of described top board 16 and the spacing positioning boss carrying above by top board 16 and counterdie mold insert II 21 is realized, between the locating slot of the positioning table of described top board 16 and counterdie mold insert II 21, the gap of reserved 0.2mm, is conducive to the motion of top board 16; The location of described push rod 18 and the spacing jogger hole of processing by counterdie mold insert I 15 and counterdie mold insert II 21 are realized, the described jogger hole relation that should be 1:1 relative to push rod 18, between push rod 18 and jogger hole, leave the gap of 0.1mm, be conducive to the motion of push rod 18.
The upper surface of described patrix air chamber 1 as with the contact-making surface of forming machine, the upper surface of described patrix air chamber is inlaid with the patrix sealing strip 2 sealing in order between patrix air chamber 1 and forming machine template.
The upper surface of described counterdie air chamber 3 is as die joint, is inlaid with the counterdie die joint sealing strip 22 in order to play buffering and sealing function when the upper and lower mould matched moulds on the die joint of described counterdie air chamber 3.
The lower surface of described counterdie air chamber 3 as with the contact-making surface of forming machine, on the lower surface of described counterdie air chamber, be inlaid with the counterdie sealing strip 23 sealing in order between counterdie air chamber 3 and forming machine template.
The outside of described patrix air chamber 1 is fixed with automatic spray gun; The lower end of described automatic spray gun through the cavity of patrix air chamber, be inserted into mold cavity and contact with heavily blocking gear box lateral surface, what complete Foam Pattern fills material action.
Described heavily card gear box evaporative pattern mold coordinates forming machine to use, and has the flange and the seal groove that contact with the cope match-plate pattern of forming machine on the lateral surface of described patrix air chamber 1; And in seal groove, inlay two bar silica gel sealing bars, on the lateral surface of described counterdie air chamber 3, there is the flange and the seal groove that contact with the lower bolster of forming machine, and in seal groove, inlay two bar silica gel sealing bars, the cope match-plate pattern of forming machine is fixed in part of the upper die by the flange on patrix air chamber 1, the cope match-plate pattern of forming machine is moving platen, drive part of the upper die is up and down, completes mould open/close action; Part of the lower die is fixed on the lower bolster of forming machine by the flange of counterdie air chamber 3, the lower bolster of forming machine is solid plate, and the part of the lower die of mould is maintained static.
The indoor chamber of mould gas will pass into vapours, and pressurize, the sealing system of mould is very important like this, the sealing system of mould comprises four parts, mosaic seal between patrix air chamber 1 and forming machine cope match-plate pattern, the lower bolster mosaic seal of counterdie air chamber 3 and forming machine, completes the sealing between mould and forming machine; Upper/lower die die joint place, at counterdie air chamber 3 die joint place mosaic seals, completes the sealing between upper/lower die, and patrix is loosed core and inlayed silica gel sealing pad between cylinder 4 and patrix air chamber 1 outer wall, completes the sealing that patrix is loosed core between cylinder and patrix air chamber 1.

Claims (1)

1. heavily block an evaporative pattern mold for gear box, described evaporative pattern mold is two covers that structure is identical; Described evaporative pattern mold includes upper die and lower die; Described patrix has patrix air chamber (1), the cuboid that described patrix air chamber (1) is internal cavities; Described counterdie has counterdie air chamber (3), the cuboid that described counterdie air chamber (3) is internal cavities; Described patrix air chamber (1) and counterdie air chamber (3) are when patrix and counterdie closure, and the cavity between patrix air chamber and counterdie air chamber forms mold cavity; It is characterized in that: in the die cavity of described patrix air chamber (1), be provided with the patrix side core-pulling mold insert (6) that heavily blocks gear box lateral surface back-off in order to moulding; Corresponding described patrix side core-pulling mold insert (6) arranges the patrix cylinder (4) of loosing core, and the described patrix cylinder (4) of loosing core is positioned on the outer side surface of patrix air chamber (1);
Corresponding described patrix side core-pulling mold insert (6) is provided with the patrix side core-pulling mold insert guiding mechanism playing the guiding role in folding mold process; Described patrix side core-pulling mold insert guiding mechanism includes copper dovetail (11) and dovetail groove (12), described copper dovetail (11) is positioned at the upper end face of patrix side core-pulling mold insert (6), by CARBURIZING FURNACE FOR STAINLESS FASTENER, be fixed on patrix air chamber inner chamber, coordinate with dovetail groove (12) fixing on patrix side core-pulling mold insert; Described dovetail groove (12) is fixed on the upper end face of patrix side core-pulling mold insert (6);
Corresponding described patrix side core-pulling mold insert (6) is provided with patrix side core-pulling mold insert detent mechanism, and described patrix side core-pulling mold insert detent mechanism consists of the locating slot on positioning boss and patrix air chamber on patrix side core-pulling mold insert; The bottom surface of patrix side core-pulling mold insert is provided with location-plate (5) simultaneously;
Described patrix side core-pulling mold insert (6) is hollow-core construction; The patrix air chamber side corresponding with patrix side core-pulling mold insert is reserved with vapours through hole and cooling water through hole, and the forming surface of patrix side core-pulling mold insert (6) communicates with patrix air chamber inner chamber by the vent plug of inlaying on it, vapours through hole and the cooling water through hole of patrix air chamber;
Described patrix air chamber (1) has patrix mold insert I (7), the patrix mold insert II (13) that moulding heavily blocks gear box both ends of the surface, described patrix mold insert I (7), patrix mold insert II (13) lays respectively on two corresponding internal faces of patrix air chamber inner chamber, and fixes by CARBURIZING FURNACE FOR STAINLESS FASTENER; Described patrix mold insert I (7), patrix mold insert II (13) are hollow structure; Described patrix air chamber (1) is connected with mold cavity by the vent plug inlayed in patrix mold insert I (7), patrix mold insert II (13) and the preformed hole of patrix air chamber (1);
Described patrix air chamber has three locating slots, has three locating dowels that coordinate with the locating slot having on patrix air chamber on described counterdie air chamber; The detent mechanism that the locating dowel (17) having on the locating slot (8) having on patrix air chamber and counterdie air chamber plays the role of positioning while being jointly formed in evaporative pattern mold matched moulds;
Described counterdie air chamber has for the counterdie mold insert I (15) of the surface of internal cavity of moulding gear box, counterdie mold insert II (21), and described counterdie mold insert I (15), counterdie mold insert II (21) are hollow structure, is positioned in the middle of counterdie air chamber (3); Counterdie air chamber (3) has the mosaic groove of counterdie mold insert I (15), counterdie mold insert II (21) with the faying face of counterdie mold insert I (15), counterdie mold insert II (21), on the groove wall of counterdie air chamber (3) and counterdie mold insert I (15), counterdie mold insert II (21) faying face, there is steam hole through hole and cooling water through hole, counterdie mold insert I (15), counterdie mold insert II (21) forming surface are inlaid with vent plug, and mold cavity and counterdie air chamber (3) are communicated;
Described counterdie air chamber (3) has moulding and heavily blocks the counterdie side core-pulling mold insert II (20) of gear box central dividing plate and the counterdie side core-pulling mold insert I (19) of the local back-off of molding cavity; Described counterdie side core-pulling mold insert I (19) and counterdie side core-pulling mold insert II (20) are two; Described counterdie side core-pulling mold insert I (19) and counterdie side core-pulling mold insert II (20) are hollow structure; Reserved vapours through hole and cooling water through hole on the counterdie air chamber corresponding with counterdie side core-pulling mold insert I (19), counterdie side core-pulling mold insert II (20);
Described counterdie air chamber (3) has the automatic ejecting mechanism of Foam Pattern, and described automatic ejecting mechanism comprises top board (16), push rod (18), ejects cylinder (24); Described top board (16) is positioned at the die joint place of counterdie air chamber, along the surrounding setting of counterdie mold insert I (15), counterdie mold insert II (21), in groove between counterdie air chamber (3) and counterdie mold insert I (15), counterdie mold insert II (21), under four drives that eject cylinder, move reciprocatingly; The through hole of reserved vapours through hole and cooling water in the groove of counterdie air chamber; Reserved vapours through hole and cooling water through hole in the middle of described top board (16); Described top board (16) and ejecting between cylinder (24) by being threaded togather on four connecting rods, four connecting rods are positioned at top board (16) and eject in the middle of cylinder (24), four connecting rods are simultaneously through the copper guide pin bushing that is fixed on counterdie air chamber, described copper guide pin bushing is corresponding with connecting rod, have four, complete the guiding to top board; Four eject cylinder and are fixed on counterdie air chamber inner chamber by CARBURIZING FURNACE FOR STAINLESS FASTENER, eject the piston movement direction of cylinder by adjustment, complete the opening and closing movement of top board (16) and push rod (18); The location of described automatic ejecting mechanism and the spacing positioning boss carrying above by top board (16) are realized.
CN201210304343.8A 2012-08-24 2012-08-24 Lost foam casting die of transmission gear box body of heavy truck CN102784887B (en)

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CN102962402A (en) * 2012-12-11 2013-03-13 洛阳刘氏模具有限公司 Side core-pulling device for evanescent mode die of motor casing
CN103394652A (en) * 2013-08-16 2013-11-20 洛阳钢丰机械制造有限公司 Device and process for preparing integrated bottom box and core sand mould
CN104226906B (en) * 2014-09-26 2016-04-20 纪汉伟 A kind of manufacture method of type cavity mould
CN105478675B (en) * 2016-01-28 2018-02-09 洛阳刘氏模具有限公司 Motor casing evaporative pattern mold with mold insert quick change construction

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