CN108788072A - A kind of die casting - Google Patents

Abstract

The invention discloses a kind of die castings, including upper mold, lower die, the elongated slot being equipped in upper mold at left and right sides of perforation, crossbeam is movably equipped in elongated slot, crossbeam is equipped with the reverse drawing bar for extending to upper mold cavity, the crossbeam compression spring against crossbeam is additionally provided on the upside of elongated slot, it is rotationally equipped with the first drag hook and corresponding position limiting structure respectively in the left and right sides of lower die, the upper end of first drag hook is equipped with hook part, the lower end of first drag hook is equipped with the first lug boss extended to the other side, catch on the beam-end for stretching out upper mold in hook part, the torsional spring for pinning the first drag hook is additionally provided in the rotation axis of first drag hook, upper mold in the first drag hook there is the side of the first lug boss to be installed with poke rod, the lower part of poke rod is equipped with the first pushing block of protrusion close to the first lug boss side, the both ends of first pushing block are equipped with guiding surface.Present invention can ensure that product all rests on the die casting of lower die when molding, to effectively avoid product after molding from flexural deformation phenomenon occur.

Description

A kind of die casting

Technical field

The present invention relates to technical field of mold, more particularly, to a kind of aluminum alloy die-casting die structure.

Background technology

Existing aluminum alloy die-casting die generally includes upper die and lower die, be arranged in upper mold into system of pouring, be arranged under Ejecting mechanism and cooling system on mould etc. are for the common product with opening or cavity towards side Convenient for the ejection of product after molding, the cavity of indent is set usually in upper mold, the core of evagination is set in lower die, when When upper and lower mould is combined, the cavity of shaped article is formed between the cavity of upper mold and the core of lower die.When formed product and cold But after shaping, upper and lower mould separates, and product rests on lower die by the Bao Moli caused by its cooling meat between core On, product is ejected along the longitudinal direction of mold finally by the ejecting mechanism in lower die, to be detached with the core of lower die.Work as product When with sidewise hole, then side core-pulling can be carried out by the mechanical structure of inclined guide pillar or hydraulic cylinder one kind.But it is existing There are following two problems for aluminum alloy die-casting die：First, when designing mould structure, typically by the opening of product or cavity It is arranged in lower die side, so as to product towards lower die side, or by the side larger Bao Moli in two side of die joint Lower die side can be rested on after molding.However, for some simultaneously have towards upper and lower both sides opening or cavity product or Person is to be located at die joint up and down for the Bao Moli products relatively of both sides, is difficult to ensure after formed product and rests on lower die On, it is susceptible to the phenomenon that product wraps mould, once product packet in upper mold, will seriously affect subsequent production, and product Therefore the packet mould force direction of upper different piece is on the contrary, easily cause the flexural deformation of product；Secondly, for some in sidewise hole For there is the product of radial blind holes simultaneously on wall, existing inclined guide pillar or a kind of core-pulling mechanism simple in structure of hydraulic cylinder It will be unable to be molded sidewise hole and radial blind holes simultaneously, people can only generally be completed by the methods of secondary operation, therefore it exists Time-consuming and laborious problem.

Invention content

It is an object of the invention to have the production of upper and lower both-side opening to solve existing aluminum alloy die-casting die in molding It is susceptible to the problem of product wraps mould and flexural deformation when product, product when one kind can ensure that molding is provided and is all rested on The die casting of lower die, to effectively avoid product after molding from flexural deformation phenomenon occur.

It is another object of the present invention to solve present in existing aluminum alloy die-casting die be difficult to be molded side simultaneously The problem of radial blind holes on forming hole and lateral forming hole inner wall, a kind of die casting of achievable twice core pulling is provided, It can disposably be molded the radial blind holes on lateral forming hole and lateral forming hole inner wall simultaneously, to avoid subsequent secondary machine Tool is processed, and production efficiency is improved.

To achieve the goals above, the present invention uses following technical scheme：

A kind of die casting includes that it is left that perforation is equipped in upper mold with the upper mold into system of pouring, the lower die with ejecting mechanism The elongated slot of right both sides, the bottom surface of elongated slot are equipped with the pilot hole for extending longitudinally to upper mold cavity along die casting, removable in elongated slot It is equipped with crossbeam dynamicly, the left and right side of upper mold is stretched out at the both ends of crossbeam respectively, and crossbeam is anti-equipped with being slidably connected with pilot hole Pull rod is equipped with spring mounting groove far from lower die side in elongated slot, is equipped with guide post in spring mounting groove, the other end of guide post is worn Cross after crossbeam and be plugged on elongated slot close to the bottom surface of lower die side, be arranged in the guide post in spring mounting groove one end against The crossbeam compression spring of crossbeam is also slidably equipped with release link in upper mold, and release link one end is connected with crossbeam, and the other end is along compression mod Tool extends longitudinally to die joint, is rotationally equipped with the first drag hook respectively in the left and right sides of lower die and can limit the first drawing The position limiting structure that hook is rotated to side, the upper end of first drag hook are equipped with the hook part extended to side, the lower end of the first drag hook Equipped with the first lug boss extended to the other side, the beam-end for stretching out upper mold is caught in hook part, is gone back in the rotation axis of the first drag hook Equipped with the torsional spring for pinning the first drag hook, upper mold in the first drag hook there is the side of the first lug boss to be installed with poke rod, poke rod Lower part the first pushing block of protrusion is equipped with close to the first lug boss side, the both ends of the first pushing block are equipped with guiding surface.

A moveable crossbeam is laterally arranged in the present invention in upper mold, while being equipped in the both sides of lower die and catching on crossbeam First drag hook, when die cast, the reverse drawing rod end surface on crossbeam is to constitute a part for upper mold cavity.When formed product terminates When upper and lower mould is separated from each other, crossbeam is relatively fixed by the effect of the first drag hook of both ends with lower die holding, to make on crossbeam Reverse drawing bar continues to push down product upper surface after molding, and then counteracting product is in the Bao Moli of upper mold side, it is ensured that product is reliable Ground rests on lower die side, and avoid product because different parts packet mould force direction it is inconsistent due to there is flexural deformation, dial at this time First pushing block of lever lower end protrusion and the first lug boss of the first drag hook lower end are separated.When upper and lower mould separates a spacing From rear, Bao Moli of the product in upper mold side is substantially reduced, and the first of the poke rod lower end protrusion being fixed at this time in upper mold pushes away Motion block is in contact with the first lug boss of the first drag hook lower end, and the first pushing block pushes the first lug boss of the first drag hook, to The first drag hook is set to rotate, in this way, the hook part of the first drag hook upper end is detached from beam-end, crossbeam and reverse drawing bar rest on It is separated in upper mold and with lower die, consequently facilitating the ejecting mechanism of lower die ejects product, crossbeam compression spring can then make reverse drawing bar, cross Beam rests on state when being detached with the first drag hook.When upper and lower mould molds again, the first pushing block of poke rod pushes first First lug boss of the first drag hook makes the first drag hook rotate, and the end of crossbeam can enter the hook part of the first drag hook at this time；Then First pushing block of poke rod is separated with the first lug boss of the first drag hook, is inverted and is resetted under the action of the torsional spring of the first drag hook, To make the hook part of the first drag hook upper end catch on crossbeam, and release link can then push reset of the crossbeam in elongated slot, reset simultaneously Bar may also function as the effect of guide rod, increase stability when cross beam movement.

Preferably, the reverse drawing bar includes the fixed section of sleeve-shaped and one end is plugged on extension inside fixed section inner cavity Section, the upper end of fixed section are fixedly connected with crossbeam, and the lower end of fixed section is equipped with necking, and extended segment is adapted with necking, extended segment Upper end in fixed section is equipped with the position-arresting disk being adapted to fixing end madial wall, and sealing is equipped on the periphery of position-arresting disk Circle is slidably connected to make extended segment be formed with fixed section, is additionally provided with telescopic oil cylinder at poke rod in the side of upper mold, stretches It is equipped with the first crotch towards the piston rod end that lower die direction extends on contracting oil cylinder, the cylinder body of telescopic oil cylinder is close to lower die side Hydraulic oil is filled in working cavity, the part that the piston rod of telescopic oil cylinder is located in working cavity is arranged with resetting spring, work Make cavity by pipeline to be connected with fixed section inner cavity, the working chamber of the cross-sectional area and telescopic oil cylinder of the fixed section inner cavity The piston effective area of body side is equal, lower die between positioned at poke rod and piston rod be equipped with rotatable second drag hook, And the limited post that the second drag hook is rotated to side can be limited, the second drag hook is curved equipped with that can hook first close to the upper end of upper mold Second crotch of hook, there are distances, the second crotch to be equipped with pushing tiltedly close to upper mold side between the first crotch and the second crotch Face is additionally provided with the torsional spring for pinning the second drag hook in the rotation axis of the second drag hook, and the lower end of the second drag hook is set close to poke rod side There are the second lug boss, poke rod lower end to be equipped with the second pushing block of protrusion, the left and right sides of upper mold close to the second lug boss side The normally opened travel switch for further respectively having locking electromagnet and being electrically connected with locking electromagnet, locking electromagnet are located at cross Side of the beam far from the first drag hook, the iron core of locking electromagnet are equipped with the locking head of taper close to first drag hook one end, and stroke is opened Off-position is equipped with stroke briquetting in side of first drag hook far from crossbeam, the first drag hook close to travel switch side, and beam-end is leaned on Nearly locking electromagnet side is equipped with the lock groove that can be adapted to locking head, when what upper and lower mould was separated from each other to poke rod first pushes away When motion block pushes the first lug boss of the first drag hook to make the hook part of the first drag hook be disengaged with crossbeam, the stroke on the first drag hook Briquetting triggers travel switch, and the energization of locking electromagnet makes iron core act, and locking head, which enters in the lock groove of crossbeam, makes crossbeam locking.

When form depth of the product in upper mold is deeper, it would be desirable to so that product is detached with upper mold longer apart from ability Ensure that Bao Moli of the product in upper mold is reduced to zero, for this purpose, reverse drawing bar is arranged to stretching structure by the present invention, to be conducive to Reduce the stroke of crossbeam, and then the thickness of upper mold can be reduced.Due between the first crotch and the second crotch there are distance, When formed product, which terminates upper and lower mould, to be separated from each other, the first drag hook works first, catches on crossbeam and pushes down production together with reverse drawing bar Product, to make product rest on lower die side.Then, poke rod makes the first drag hook break off relations, while touching travel switch, makes electromagnetism Iron acts locking crossbeam.At the same time, the second crotch of the second drag hook catches on the first crotch of telescopic oil cylinder piston rod end, makes Hydraulic oil in piston driving working cavity enters the fixing end inner cavity of reverse drawing bar by pipeline, and then pushes prolonging for reverse drawing bar It is protruding to continue to push down product to stretch section.Due to the cross-sectional area of fixed section inner cavity and the working cavity one of telescopic oil cylinder The piston effective area of side is equal, therefore, it can be ensured that the extension elongation of extended segment is equal with the separation distance of upper and lower mould, in turn Ensure that product accurately rests on lower die side.When upper and lower mould molds, the pushing inclined-plane on second the second crotch of drag hook end It is contacted with the first crotch of piston rod end, to make the second drag hook rotate, it is curved that the second crotch of end can cross first Hook, then auto-reverse reset under the action of torsional spring.

Preferably, further including the side core-drawing mechanism being arranged in upper mold, the side core-drawing mechanism includes that setting exists The drive cylinder connected with main core for the main core of shaped article sidewise hole in the side core-pulling hole of upper mold, the principal mode Core includes the core set being axially movably connected in side core-pulling hole, is rotatably connected in core set turning set, adaptation Driving in turning set draws core, the forming ends periphery that core covers front to be equipped with radial core pilot hole, turning set Periphery is equipped with circumferentially extending T shape card slots, and the depth of straight trough is from one end of T shape card slots to another in T shape card slots End is linear to be incremented by, and core pilot hole is corresponding with one end that straight trough depth in T shape card slots is shallower, the company of sliding in core pilot hole It is connected to time core, the upper end that secondary core stretches out core pilot hole is the molding of the radial blind holes for shaped article sidewise hole inner wall The lower end in portion, secondary core is stretched into T shape card slots, and the lower end of secondary core be laterally provided with screens T shape card slots translot Interior lateral pin, it is a multi-diameter shaft that core is drawn in driving, and driving draws the small end at core rear portion to be connected with the piston rod of drive cylinder, driving oil The piston rod of cylinder is equipped with the lock plate that rear end face is covered against core, and driving draws the big end periphery of core front to be equipped with spiral Slot, front end of the helicla flute far from drive cylinder and a smooth connection of guide groove axially extended, driving draw core big end and Small end intersection is equipped with transition circular conical surface, and the madial wall of turning set is equipped with the sliding pin stretched into helicla flute rear end, core set External lock core bore is radially equipped on lateral wall, the side core-pulling hole madial wall of upper mold is equipped with lock core in the position of corresponding external lock core bore Accommodating blind hole, the lock core, which houses to be equipped in blind hole, stretches into external lock core bore and the first lock core against turning set lateral wall, the Lock core compression spring is equipped between one lock core and the bottom surface of the accommodating blind hole of lock core, turning set is radial in the axial position of corresponding external lock core bore Ground is equipped with internal lock core bore, covers the second lock core of madial wall in internal lock core bore against core equipped with outer end, and the second lock core exposes rotation The inner end for covering madial wall is equipped with the sliding cap that core small end periphery is drawn against driving.

The side core-drawing mechanism of the present invention uses drive cylinder as power source, consequently facilitating the control of actuation time and active force System.When drive cylinder start action when, piston rod pulls first driving draw mandrel draw back, by driving draw core helicla flute with The effect of sliding pin on turning set, you can driving turning set rotation, secondary core of the screens at this time in the T shape card slots of turning set Gradually close to turning set axle center, to make the forming part of time core front end be extracted out from the radial blind holes of product sidewise hole inner wall, Sliding pin reaches the guide groove being connected with helicla flute at this time, and turning set stops operating, and the second lock core on turning set is rigid at this time It turns to well inconsistent with upper first lock core of core set.When driving draws core to continue to retreat, sliding pin moves in guide groove To the front end of guide groove to make to position in the axial direction between the two, and the second lock of core small end periphery is drawn against driving originally Core then draws the transition circular conical surface on core to be in contact with driving, and the second lock core is radially ejected by transition circular conical surface, to make the first lock Core is housed completely into the lock core to upper mold in blind hole, and the outer end of the second lock core then enters in the external lock core bore of core set, this Template core retainer plate is the limit released between the side core-pulling hole of upper mold.With driving draw core continuation after move, you can pull turn Dynamic set is moved together together with core set, to complete entire side core-pulling process.That is, the present invention passes through a driving oil The disposable core pulling of the radial blind holes in product sidewise hole and sidewise hole can be realized in cylinder, to significantly increase production effect Rate.

Therefore, the present invention has the advantages that：Product all rests on the die casting of lower die when can ensure that molding, There is flexural deformation phenomenon to effectively avoid product after molding, and can disposably be molded lateral forming hole and lateral simultaneously Radial blind holes on forming hole inner wall improve production efficiency to avoid subsequent secondary mechanical from processing.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of the present invention.

Fig. 2 is the side view of Fig. 1.

Fig. 3 is the structural schematic diagram of reverse drawing bar.

Fig. 4 is the structural schematic diagram of side core-drawing mechanism.

Fig. 5 is the enlarged drawing at A in Fig. 4.

In figure：1, upper mold 11, elongated slot 12, pilot hole 13, guide post 14, spring mounting groove 15, crossbeam compression spring 16, Release link 2, lower die 21, side core-pulling hole 22, die joint 3, crossbeam 31, first hook inclined-plane 32, lock groove 4, reverse drawing Bar 41, fixed section 411, necking 42, extended segment 421, position-arresting disk 422, the 5, first drag hook 51 of capping, hook part 511, the Two hook inclined-planes 52, stroke briquetting 54, spacer pin 6, poke rod 61, the first pushing block 611, push away first lug boss 53 Dynamic face 612, guiding surface 62, the second pushing block 7, telescopic oil cylinder 71, piston rod 711, the first crotch 8, the second drag hook 81, the second crotch 811, push inclined-plane 82, the second lug boss 9, locking electromagnet 91, travel switch 92, locking head 10, Core 204, core pilot hole 205, T shape card slots are drawn in product 20, main core 201, core set 202, turning set 203, driving 206, secondary core 208, helicla flute 209, guide groove 210, transition circular conical surface 211, sliding pin 212, external lock core bore 213, Lock core houses blind hole 214, the first lock core 215, lock core compression spring 216, internal lock core bore 217, the second lock core 218, sliding cap 30, drive cylinder 40, lock plate.

Specific implementation mode

The present invention will be further described with specific implementation mode below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, a kind of die casting, it is suitable for having opening or cavity towards upper and lower both sides simultaneously Product or be the Bao Moli products relatively for being located at die joint both sides up and down is specifically included with into the upper of system of pouring Mould 1, the lower die 2 with ejecting mechanism.For convenience of description, upper and lower mould is divided mould and molding direction to be known as compression mod by we The longitudinal direction of tool is correspondingly known as the transverse direction of die casting with longitudinally perpendicular direction.One perforation of setting is left first in upper mold The elongated slot 11 of the lateral arrangement of right both sides, the cross section of elongated slot is rectangular, is arranged on the bottom surface of lower die side on elongated slot Along the pilot hole 12 for extending longitudinally to upper mold cavity of die casting.Setting can be along the cross of the longitudinal movement of die casting in elongated slot Beam 3, and the both ends of crossbeam is made to stretch out the left and right side of upper mold respectively.The reverse drawing that setting is slidably connected with pilot hole on crossbeam Bar 4, reverse drawing bar extend to upper mold cavity, so that reverse drawing rod end surface is constituted a part for upper mold cavity, certainly, it would be desirable to make reverse drawing Rod end surface matches with upper mold cavity.Setting spring mounting groove 14 is also needed far from lower die side in elongated slot, and in spring mounting groove Interior setting crossbeam compression spring 15, crossbeam compression spring one end is against the bottom surface of spring mounting groove, and the other end is against crossbeam so that crossbeam exists Upper and lower mould can be automatically positioned in elongated slot when separating close to lower die side.We can also be fixedly installed in spring mounting groove Guide post 13 is plugged on elongated slot close to the bottom surface of lower die side after the other end extension of guide post, guide post is constituted with crossbeam and slided Dynamic connection, crossbeam compression spring are set in guide post.In this way, on the one hand can avoid the distortion of crossbeam compression spring, cross on the other hand can be made Beam moves longitudinally in elongated slot.In addition, we need to also be in upper mold close to the slidably setting reset respectively of left and right sides position Bar 16, release link one end are connected with crossbeam, the other end then along the die joint 22 for extending longitudinally to upper and lower mould of die casting, In this way, when upper and lower mould molds, release link is in contact with the die joint of lower die, you can crossbeam is pushed to be moved in elongated slot far It is resetted from lower die side.Further, in the left and right sides of lower die respectively rotatably arranged with substantially by the vertical of die casting To arrangement the first drag hook 5 and the position limiting structure that the first drag hook rotates to side can be limited, the upper end of the first drag hook is close to horizontal The hook part 51 extended to the bending of crossbeam side is arranged in beam side, and the first protrusion extended to the other side is arranged in the lower end of the first drag hook Portion 52, to make the first drag hook be in zigzag, the crossbeam both ends for stretching out upper mold elongated slot are caught in the hook part of two the first drag hooks respectively End is additionally provided with the torsional spring for pinning the first drag hook in the rotation axis of the first drag hook, so as to drive the first drag hook in one direction Rotation, and limited by position limiting structure.Specifically, position limiting structure can be provided in the spacer pin of the first drag hook side in lower die 54.The action of first drag hook in order to control, the side that we also need to the first lug boss close to the first drag hook in upper mold are fixed A piece longitudinally arranged poke rod 6 for substantially pressing die casting is set, and the lower part of poke rod is arranged close to the first lug boss side First pushing block 61 of protrusion, the first pushing block include the intermediate parallel longitudinal promotion face 611 with die casting and promotion The guiding surface 612 at face both ends, to keep the first pushing block trapezoidal.

When die cast, the reverse drawing rod end surface on crossbeam is to constitute a part for upper mold cavity, certainly, it would be desirable to be made anti- Pull rod end face is made to match with upper mold cavity.When formed product, which terminates upper and lower mould, to be separated from each other, crossbeam is drawn by both ends first Hook is caught on, to be relatively fixed with lower die holding, that is to say, that the reverse drawing bar on crossbeam continues to push down product upper table after molding Face, at this point, the first pushing block of poke rod lower end protrusion and the first lug boss of the first drag hook lower end are in discrete state.When After upper and lower mould is separated by a distance, Bao Moli of the product in upper mold side is reduced to close to zero, that is to say, that product can be complete Full cut-off stays in lower die side, at this time close to the guiding surface and first of upper mold one end on the first pushing block of poke rod lower end protrusion First lug boss of drag hook lower end is in contact, and to push the first lug boss of the first drag hook to be moved to side, and then makes first Drag hook overcomes the elastic force of torsional spring to rotate, in this way, the hook part of the first drag hook upper end is detached from beam-end, crossbeam and reverse drawing bar It rests in upper mold and is separated with lower die, crossbeam at this time is located in elongated slot under the action of crossbeam compression spring close to lower die Side, and release link is then pierced by the die joint of upper mold.When upper and lower mould separates in place, the ejecting mechanism of lower die can be by product Ejection, and the first drag hook is then auto-reverse under the action of torsional spring, and limited by position limiting structure.When upper and lower mould molds again When, the guiding surface far from upper mold one end connects with the first lug boss of the first drag hook first on the first pushing block of poke rod It touches, to push the first lug boss of the first drag hook to be moved to side, and then the elastic force for making the first drag hook overcome torsional spring rotates；It connects The promotion face for the first pushing block is in contact with the first drag hook, and the first drag hook keeps rotary state, in this way, the first drag hook upper end hooks Portion can cross crossbeam from the side of crossbeam；Then close to the guiding surface and the first drag hook phase of upper mold one end on the first pushing block Contact, gradually reversion resets to catch on crossbeam the first drag hook under the action of torsional spring, at this time the die joint of lower die just with it is multiple The end face contact of upper mold is stretched out on the bar of position；When upper and lower mould continues close to molding in place, the first pushing block of poke rod and the First lug boss of one drag hook is separated a distance, and crossbeam is then moved under the action of release link in elongated slot far from lower die The original state of side, in order to next time divide mould.

In addition, the first drag hook of lower die both sides can be separately positioned on the both sides of crossbeam, the hook of the first drag hook upper end by we Portion's setting can catch on the second of crossbeam and hook inclined-plane 511, and second hooks inclined-plane tilts towards upper mold side from the inside to the outside, accordingly Ground, the both ends of crossbeam are respectively set first parallel with the second hook inclined-plane on the first drag hook of phase the same side and hook inclined-plane 31, Second hook inclined-plane of hook part engages to catch on beam-end with the first hook inclined-plane of beam-end.In this way so that the Realize contact of incline plane between the hook part and crossbeam of one drag hook, therefore, when the first drag hook rotates can between crossbeam quick separating, To be conducive to accurately control hook time and the rhythm of crossbeam, and be conducive to reduce the torque for pushing the rotation of the first drag hook.

For some deeper products of the form depth in upper mold, crossbeam and reverse drawing bar need between upper mold when dividing mould It forms larger shift motion and just can ensure that product rests on lower die side, in this way, the long groove depth of upper mold needs correspondingly to increase Add, to need to increase the thickness of upper mold.For this purpose, Telescopic rod structure can be made in reverse drawing bar by we, specifically, as shown in figure 3, Reverse drawing bar includes the fixed section 41 of sleeve-shaped and one end is plugged on extended segment 42 inside fixed section inner cavity, the upper end of fixed section with Crossbeam is fixedly connected, and the lower end of fixed section has necking 411, and extended segment is adapted with necking, and extended segment is located in fixed section The position-arresting disk 421 being adapted to fixing end madial wall is then arranged in upper end, is slidably connected to make extended segment be formed with fixing end.It needs Illustrate, the capping 422 of a covering fixed section lower end can be arranged in the lower end of extended segment in we, to avoid extended segment in axis Upwards inside retraction fixed section inner cavity.In addition, as shown in Fig. 2, also needing fixed setting one at poke rod in the side of upper mold A telescopic oil cylinder 7 is bent to form the on telescopic oil cylinder towards 71 end of piston rod that lower die direction extends towards poke rod side The cylinder body of one crotch 711, telescopic oil cylinder is filled with hydraulic oil, the piston rod of telescopic oil cylinder in the working cavity of lower die side Part in working cavity is arranged a resetting spring, and working cavity is connected by pipeline with fixed section inner cavity, and The cross-sectional area of fixed section inner cavity is equal with the piston effective area of working cavity side of telescopic oil cylinder.Such telescopic oil cylinder Piston rod can with extended segment formed link, when piston rod pushing so that working cavity is reduced when, hydraulic oil is entered by pipeline Fixed section inner cavity, to push extension segment sync protruding；Conversely, exercising working cavity on piston rod when resetting spring pushes When becoming larger, working cavity forms vacuum effect, and the hydraulic oil of fixed section inner cavity is flowed back by pipeline in working cavity, by means of The vacuum effect of fixed section inner cavity, you can extension segment sync is made inwardly to bounce back reset.Certainly, it would be desirable in the circumference of position-arresting disk Corresponding sealing ring is set on face, in order to avoid the leakage of hydraulic oil.

In order to control the action of telescopic oil cylinder piston rod, we can set between being located at poke rod and piston rod in lower die Rotatable second drag hook 8 is set, the second drag hook is bent to form in the piston rod side of upper end towards telescopic oil cylinder close to upper mold The second crotch 81 of the first crotch can be hooked, is equipped with far from the first crotch side on the second crotch and pushes inclined-plane 811, the first crotch And second there are distances between crotch, that is to say, that only after upper and lower mould is separated by a distance, the just meeting of the first, second drag hook Mutually hook.In addition, need that the torsional spring for pinning the second drag hook is arranged in the rotation axis of the second drag hook, and in the second drag hook of lower die Side, which is arranged one, can limit the spacer pin that the second drag hook is rotated to side.The lower end of second drag hook is arranged close to poke rod side Second lug boss 82, and the second pushing block 62 of protrusion is then arranged close to the second lug boss side for poke rod lower end, second pushes Block includes the guiding surface in the intermediate parallel longitudinal promotion face and promotion face both ends with die casting, to make the second promotion Block is trapezoidal.

In addition, also need to be respectively set can be by locking electromagnet 9 that compression spring automatically resets, Yi Jihe for the left and right sides of upper mold The normally opened travel switch 91 of locking electromagnet electrical connection, locking electromagnet are located at side of the crossbeam far from the first drag hook, locking The locking head 92 of taper is arranged close to first drag hook one end for the iron core of electromagnet, and beam-end is arranged close to locking electromagnet side The lock groove 32 that can be adapted to locking head.Travel switch is arranged in side of first drag hook far from crossbeam, and the first drag hook leans on Nearly travel switch side setting stroke briquetting 53.When the first pushing block that upper and lower mould is separated from each other to poke rod pushes first to draw When first lug boss of hook is to make the hook part of the first drag hook be disengaged with crossbeam, the stroke briquetting triggering stroke on the first drag hook is opened It closes, the energization of locking electromagnet makes iron core act, and locking head, which enters in the lock groove of crossbeam, makes crossbeam locking.

When formed product, which terminates upper and lower mould, to be separated from each other, the first drag hook works first, catches on crossbeam together with reverse drawing bar Product is pushed down, to make product rest on lower die side.Then, the first of the first pushing block the first drag hook of pushing of poke rod is convex The portion of rising makes the first drag hook rotate and break off relations with crossbeam, and the stroke briquetting on the first drag hook is then close to travel switch, to touch row Cheng Kaiguan makes the iron core of locking electromagnet act, and locking head enters in the lock groove of crossbeam with locking crossbeam.At the same time, second Second crotch of drag hook catches on the first crotch of telescopic oil cylinder piston rod end.When upper and lower mould continues to separate, the second drag hook hooks Firmly the movement of telescopic oil cylinder piston rod makes the hydraulic oil in piston driving working cavity pass through the fixing end that pipeline enters reverse drawing bar Inner cavity, and then push the extended segment of reverse drawing bar protruding to continue to push down product.Due to the cross section face of fixed section inner cavity Product is equal with the piston effective area of working cavity side of telescopic oil cylinder, therefore, it can be ensured that the extension elongation of extended segment and work The extension elongation of stopper rod is equal, and then ensures that product accurately rests on lower die side.And crossbeam is due to being locked up electromagnet lock Only, thus can avoid telescopic oil cylinder when working crossbeam occur retreating phenomenon.Then the second pushing block on poke rod pushes the Second lug boss of two drag hooks, to make the rotation of the second drag hook and piston rod break off relations until upper and lower mould divides mould in place, and resets bullet Spring, which then pushes, exercises working cavity and becomes larger on piston rod, to make the extension segment sync of reverse drawing bar inwardly bounce back reset.At this time Stroke briquetting is detached with travel switch, locking electromagnet power-off restoration, and crossbeam is then located in by crossbeam compression spring close in elongated slot Lower die side.

When upper and lower mould molds again, the second pushing block of poke rod is first contacted with the second lug boss of the second drag hook, from And the second drag hook is made to rotate, and since automatic uplink under the action of resetting spring resets piston rod, the second drag hook end Second crotch in portion is still located at this time outside the first crotch of piston rod end.Then, on second the second crotch of drag hook end It pushes inclined-plane to contact with the first crotch of piston rod end, to make the second drag hook rotate, the second crotch of end can be got over The first crotch is crossed, it is then auto-reverse under the action of torsional spring to reset and enter in the first crotch；First on poke rod pushes away Motion block pushes the first lug boss of the first drag hook to be moved to side, and then the elastic force for making the first drag hook overcome torsional spring rotates, then The promotion face of first pushing block is in contact with the first drag hook, and the first drag hook keeps rotary state, in this way, the first drag hook upper end hook part Crossbeam can be crossed from the side of crossbeam；Then the guiding surface on the first pushing block close to upper mold one end connects with the first drag hook Touch, the first drag hook under the action of torsional spring gradually reversion reset to catch on crossbeam, at this time the die joint of lower die just with reset The end face contact of upper mold is stretched out on bar；When upper and lower mould continues close to molding in place, the first pushing block of poke rod and first First lug boss of drag hook is separated a distance, and crossbeam is then moved under the action of release link in elongated slot far from lower die one The original state of side, in order to next time after molding point of mould.

Further, die casting of the invention further includes the side core-drawing mechanism being arranged in upper mold, it is suitable at Product with radial blind holes in the sidewise hole of type product.Specifically, shown in as shown in Figure 1, Figure 4, Figure 5, side core-drawing mechanism The driving connected with main core including the main core 20 being arranged for shaped article sidewise hole in the side core-pulling hole 21 of upper mold Oil cylinder 30, wherein main core include the core set 201 being axially movably connected in side core-pulling hole, are rotatably connected on core Core 203 is drawn in turning set 202 in set, the driving fitted in turning set.We can cover rear portion in core and match with side core-pulling hole It closes and axial sliding slot is set on the periphery of section, and sliding shoe of the screens in sliding slot is then set in side core-pulling hole, you can side Just it realizes the axially movable connection of core set and side core-pulling hole, and can avoid the rotation of core set.In addition, we can be Annular groove is set on the periphery of turning set, and the position setting screens that annular groove is then corresponded on core set is recessed in annular Gag lever post in slot, you can realize rotation connection between making turning set and core cover, avoid occurring between the two axial opposite Displacement.Radial core pilot hole 204 is set on the forming ends periphery of core set front, edge is set on the periphery of turning set The T shapes card slot 205 that circumferencial direction extends, the depth of straight trough is linearly passed from one end of T shape card slots to the other end in T shape card slots Increase, core pilot hole is corresponding with one end that straight trough depth in T shape card slots is shallower, and time core is slidably connected in core pilot hole 206, the upper end that secondary core stretches out core pilot hole is the forming part of the radial blind holes for shaped article sidewise hole inner wall, secondary type The lower end of core is stretched into T shape card slots, and cross of the screens in the translot of T shape card slots is laterally arranged in the lower end of secondary core Pin, to make the lower end of time core that can be moved in T shape card slots.It is a multi-diameter shaft that core is drawn in driving, and the small end at core rear portion is drawn in driving It is connected with the piston rod of drive cylinder, the lock plate 40 of core set rear end face is positioned against on the piston rod of drive cylinder, from And it can avoid the retrogressing of core set when molding.Driving, which is drawn, is arranged helicla flute 208 on the big end periphery of core front, helicla flute is separate The front end of drive cylinder extends axially forward to form guide groove 209 along driving drawing core, helicla flute and the smooth connection of guide groove, Driving draws the big end and small end intersection setting transition circular conical surface 210 of core, the madial wall setting of turning set to stretch into helicla flute rear end Interior sliding pin 211.In addition, radial external lock core bore 212, the side core-pulling hole of upper mold is arranged on the lateral wall at core set rear portion Madial wall houses blind hole 213 in the position setting lock core of corresponding external lock core bore, which, which houses to be equipped in blind hole, stretches into outer lock core Lock core is arranged between the bottom surface that the first lock core and lock core house blind hole in hole and the first lock core 214 against turning set lateral wall Compression spring 215, turning set are radially arranged with external lock core bore in the axial position of corresponding external lock core bore in circumferencial direction dislocation The central angle of lock core hole 216, inside and outside lock core hole dislocation is equal with the central angle corresponding to the two ends of helicla flute.Internal lock core bore Interior setting outer end covers the second lock core 217 of madial wall against core, and the inner end setting that the second lock core exposes turning set madial wall is supported The sliding cap 218 of core small end periphery is drawn by driving, the outer end face of the sliding cap is spherical surface.

The side core-drawing mechanism of the present invention uses drive cylinder as power source, consequently facilitating the control of actuation time and active force System.After formed product, drive cylinder starts core pulling, and piston rod pulls driving that mandrel is drawn to draw back first, lock plate and core Cover rear end face separation.The effect of the sliding pin on the helicla flute and turning set of core is drawn by driving, you can driving turning set rotation, It is deep that the secondary core of the shallower one end of straight trough depth in the T shape card slots of turning set of screens at this time is gradually moved to straight trough in T shape card slots Deeper one end is spent, to make time core gradually close to turning set axle center, in this way, the forming part of secondary core front end can be from product It is extracted out in the radial blind holes of sidewise hole inner wall, sliding pin reaches exactly to the guide groove being connected with helicla flute at this time, and turning set stops It rotates, the second lock core on turning set just turns to inconsistent with upper first lock core of core set at this time.When driving draw core after It is continuous that driving is drawn core to form axis in turning set and is moved back when retreating, sliding pin be moved in guide groove the front end of guide groove from And make to position in the axial direction between the two, and originally against driving draw core small end periphery the second lock core sliding cap then with drive Dynamic that the transition circular conical surface on core is drawn to be in contact, the second lock core is radially ejected by transition circular conical surface, to make the first lock core completely into The lock core entered to upper mold houses in blind hole, and the outer end of the second lock core then enters in the external lock core bore of core set, in this way, core set The axial limiting between the side core-pulling hole of upper mold is released, and turning set keeps lock-out state between then being covered with core.With It is moved after the continuation of driving drawing core, you can pull turning set communicate-type core retainer plate to move together, to make core set completely from product Sidewise hole in extraction, to complete entire side core-pulling process.After upper and lower mould molds, drive cylinder, which starts action, makes principal mode Core resets, and piston rod, which stretches out, first pushes driving to draw core Forward, and the sliding pin of turning set draws the guide groove inner shaft of core in driving at this time To be moved to helicla flute junction, due at this time turning set and core set still rely on the second lock core keep lock-out state, That is, can not relatively rotate between the two, therefore, continue to move forward with driving drawing core, you can drive turning set and type Core retainer plate moves forward internally in the side core-pulling hole of upper mold；When driving draws core to continue Forward, core set resets, the second lock core and the first lock Core coincides, and the first lock core, which can push the second lock core under the action of lock core compression spring and enter in external lock core bore, makes core set Axial lock is kept, and the second lock core then exits the locking for making turning set release between core set out of external lock core bore, Sliding cap then draws the small end of core against driving；Then, driving draws core to continue to move forward and turning set is driven to rotate up to complete reset, The second lock core at this time and the first lock core reply misaligned state, and to be then moved to straight trough depth in T shape card slots shallower for secondary core One end and reset, lock plate restores the axial lock fastening position that is covered to core against core set rear end face.That is, the present invention is logical The disposable core pulling for the radial blind holes that a drive cylinder can be realized in product sidewise hole and sidewise hole is crossed, to significantly Improve production efficiency.

Claims (2)

1. a kind of die casting includes with the upper mold into system of pouring, the lower die with ejecting mechanism, characterized in that in upper mold The interior elongated slot for being equipped with the perforation left and right sides, the bottom surface of elongated slot are equipped with the guiding for extending longitudinally to upper mold cavity along die casting Hole is movably equipped with crossbeam in elongated slot, and the left and right side of upper mold is stretched out at the both ends of crossbeam respectively, and crossbeam is equipped with and pilot hole The reverse drawing bar being slidably connected is equipped with spring mounting groove far from lower die side in elongated slot, is equipped with guide post in spring mounting groove, is oriented to The other end of column is plugged on elongated slot close to the bottom surface of lower die side after passing through crossbeam, is covered in the guide post in spring mounting groove Equipped with one end against the crossbeam compression spring of crossbeam, release link is also slidably equipped in upper mold, release link one end is connected with crossbeam, separately One end extends longitudinally to die joint along die casting, lower die the left and right sides respectively rotationally be equipped with the first drag hook and The position limiting structure that the first drag hook is rotated to side can be limited, the upper end of first drag hook is equipped with the hook part extended to side, the The lower end of one drag hook is equipped with the first lug boss extended to the other side, and the beam-end for stretching out upper mold, the first drag hook are caught in hook part Rotation axis on be additionally provided with the torsional spring for pinning the first drag hook, upper mold in the first drag hook there is the side of the first lug boss to be installed with to dial Lever, the lower part of poke rod are equipped with the first pushing block of protrusion close to the first lug boss side, and the both ends of the first pushing block are equipped with Guiding surface, the reverse drawing bar includes the fixed section of sleeve-shaped and one end is plugged on extended segment inside fixed section inner cavity, fixed The upper end of section is fixedly connected with crossbeam, and the lower end of fixed section is equipped with necking, and extended segment is adapted with necking, and extended segment, which is located at, to be fixed Upper end in section is equipped with the position-arresting disk being adapted to fixing end madial wall, sealing ring is equipped on the periphery of position-arresting disk, to make The formation of extended segment and fixed section is slidably connected, and telescopic oil cylinder is additionally provided at poke rod in the side of upper mold, on telescopic oil cylinder The piston rod end extended towards lower die direction is equipped with the first crotch, the working cavity of the cylinder body of telescopic oil cylinder close to lower die side It is inside filled with hydraulic oil, the piston rod of telescopic oil cylinder is located at the part in working cavity and is arranged with resetting spring, and working cavity is logical Pipeline is crossed with fixed section inner cavity to be connected, the cross-sectional area of the fixed section inner cavity and the working cavity side of telescopic oil cylinder Piston effective area is equal, and lower die is equipped with rotatable second drag hook between positioned at poke rod and piston rod and can limit The limited post that the second drag hook is rotated to side is made, the second drag hook is equipped in the upper end of close upper mold can hook the second of the first crotch Crotch, there are distances, the second crotch to be equipped with pushing inclined-plane close to upper mold side between the first crotch and the second crotch, and second draws The torsional spring for pinning the second drag hook is additionally provided in the rotation axis of hook, the lower end of the second drag hook is equipped with the second protrusion close to poke rod side Portion, poke rod lower end are equipped with the second pushing block of protrusion close to the second lug boss side, are further respectively had at left and right sides of upper mold Locking electromagnet and the normally opened travel switch being electrically connected with locking electromagnet, locking electromagnet are located at crossbeam far from first The side of drag hook, the iron core of locking electromagnet are equipped with the locking head of taper close to first drag hook one end, and travel switch is located at first Side of the drag hook far from crossbeam, the first drag hook are equipped with stroke briquetting close to travel switch side, and beam-end is close to locking electromagnetism Iron side is equipped with the lock groove that can be adapted to locking head, when upper and lower mould is separated from each other to the first pushing block promotion the of poke rod When first lug boss of one drag hook is to make the hook part of the first drag hook be disengaged with crossbeam, the stroke briquetting triggering row on the first drag hook Cheng Kaiguan, the energization of locking electromagnet make iron core act, and locking head, which enters in the lock groove of crossbeam, makes crossbeam locking.

2. a kind of die casting according to claim 1, characterized in that further include the side core-pulling machine being arranged in upper mold Structure, the side core-drawing mechanism include be arranged in the side core-pulling hole of upper mold for shaped article sidewise hole main core and The drive cylinder of main core connection, the main core include the core set being axially movably connected in side core-pulling hole, turn The dynamic turning set being connected in core set, the driving fitted in turning set draw core, core to cover on the forming ends periphery of front Equipped with radial core pilot hole, the periphery of turning set is equipped with circumferentially extending T shape card slots, straight in T shape card slots The depth of slot is linearly incremented by from one end of T shape card slots to the other end, and core pilot hole and straight trough depth in T shape card slots are shallower One end is corresponding, and time core is slidably connected in core pilot hole, and the upper end that secondary core stretches out core pilot hole is for being molded The lower end of the forming part of the radial blind holes of product sidewise hole inner wall, secondary core is stretched into T shape card slots, and in the lower end of secondary core Be laterally provided with lateral pin of the screens in the translot of T shape card slots, it is a multi-diameter shaft that core is drawn in driving, driving draw the small end at core rear portion with The piston rod of drive cylinder is connected, and the piston rod of drive cylinder is equipped with the lock plate that rear end face is covered against core, and driving is drawn The big end periphery of core front is equipped with helicla flute, front end of the helicla flute far from drive cylinder and a guide groove axially extended Smooth connection draws the big end of core and small end intersection to be equipped with transition circular conical surface in driving, and the madial wall of turning set, which is equipped with, stretches into spiral shell Sliding pin in spin slot rear end, core set lateral wall on radially be equipped with external lock core bore, the side core-pulling hole madial wall of upper mold Be equipped with lock core in the position of corresponding external lock core bore and house blind hole, the lock core house be equipped in blind hole stretch into external lock core bore and against First lock core of turning set lateral wall is equipped with lock core compression spring, turning set between the bottom surface that the first lock core and lock core house blind hole It is radially equipped with internal lock core bore in the axial position of corresponding external lock core bore, be equipped with outer end in internal lock core bore covers madial wall against core The second lock core, the second lock core expose turning set madial wall inner end be equipped with against driving draw core small end periphery sliding cap.