CN115106511A

CN115106511A - Die opening and closing mechanism for die casting machine

Info

Publication number: CN115106511A
Application number: CN202211044471.3A
Authority: CN
Inventors: 岑业芹; 黄礼华
Original assignee: Nantong Boying Machinery Casting Co ltd
Current assignee: Nantong Boying Machinery Casting Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-09-27

Abstract

The invention relates to the technical field of mold opening and closing mechanisms for locking and opening, in particular to a mold opening and closing mechanism for a die casting machine. A die opening and closing mechanism for a die casting machine comprises a fixed plate, a fixed die, a movable die, a driving mechanism, an injection mechanism, a sliding connection plate, a jacking mechanism and a die opening mechanism. The injection mechanism comprises a die-casting pipeline, a die-casting plunger and a pressure maintaining plunger. The die-casting pipeline is fixedly arranged on the fixed plate, is communicated with the die cavity and is used for filling molten metal. The jacking mechanism comprises a jacking assembly, a first push plate and a second push plate. When the die opening and closing mechanism for the die casting machine is used for casting nonferrous metals, the die locking force between the movable die and the fixed die can be increased through the actions of the pushing assembly and the spring telescopic rod, so that the movable die and the fixed die are attached more tightly, and the phenomenon that when molten metal enters a die, a gap is generated between the movable die and the fixed die due to insufficient die locking force, and the molten metal splashes or overflows.

Description

Die opening and closing mechanism for die casting machine

Technical Field

The invention relates to the technical field of mold opening and closing mechanisms for locking and opening, in particular to a mold opening and closing mechanism for a die casting machine.

Background

The die casting machine mainly comprises a die assembly mechanism, an injection mechanism, a hydraulic system, an electric control system and the like. In addition, the die casting machine also has parts and bases, other devices, auxiliary devices and the like, wherein the die opening and closing mechanism drives the die casting die to close and open, and when the die is closed, the die opening and closing mechanism is required to have enough force to lock the die so as to ensure that the parting surface of the die cannot expand in the injection filling process. With the progress of science and technology and industrial production, die casting machines are widely used for casting nonferrous metals such as aerospace, automobiles, high-speed rails and the like, and the die casting technology is also rapidly developed.

Die-casting product is when selecting the die casting machine, and a very important work is whether the clamping force of calculating the die casting machine satisfies, if the clamping force of die casting machine is not enough, can lead to movable mould and cover half to lead to appearing the gap because do not have complete locking at the die-casting in-process, can lead to the molten metal to spill over through the gap like this, not only can make the foundry goods not reach the standard of using, still can cause danger to the other workman of die casting machine.

Disclosure of Invention

The invention provides a die opening and clamping mechanism for a die casting machine, which aims to solve the problem of insufficient clamping force of the existing die opening and clamping mechanism.

The invention discloses a die opening and closing mechanism for a die casting machine, which adopts the following technical scheme:

a die opening and closing mechanism for a die casting machine comprises a fixed plate, a fixed die, a movable die, a driving mechanism, an injection mechanism, a sliding connection plate, a jacking mechanism and a die opening mechanism. The fixing plate is fixedly arranged; the fixed die is fixedly arranged on the fixed plate, and a die cavity is formed in the fixed die; the movable die is positioned on the left side of the fixed die, the movable die is slidably arranged on the fixed plate along the left-right direction, and a die core matched with the die cavity to form a die is arranged on the movable die; the driving mechanism is used for driving the movable die to move rightwards so as to carry out die closing action. The injection mechanism comprises a die-casting pipeline, a die-casting plunger and a pressure maintaining plunger. The die-casting pipeline is fixedly arranged on the fixed plate, is communicated with the die cavity and is used for filling molten metal. The die-casting plunger is movably arranged along the up-down direction and is used for extruding molten metal liquid in the die-casting pipeline; the pressure retaining plunger is used to push the molten metal into the mold.

The sliding connecting plate is fixedly connected with the movable die in the left-right direction and is positioned on the right side of the fixed die; the jacking mechanism comprises a jacking assembly, a first push plate and a second push plate; the pushing assembly is arranged between the fixed die and the sliding connecting plate and can slide along the vertical direction, and the projection surface of the outer contour of the pushing assembly in the front-back direction is a trapezoid with a large upper end and a small lower end; first push pedal and second push pedal set up respectively in the left and right sides that pushes away the subassembly, and one side that first push pedal and second push pedal are relative all is connected with the slider through spring telescopic link, slider and the subassembly sliding connection that pushes away, and the one side of keeping away from each other of first push pedal and second push pedal offsets with cover half and sliding connection board respectively. The mold opening mechanism is used for promoting the movable mold to be separated from the fixed mold after mold closing is finished.

Further, a convex block is mounted on the upper part of the die-casting plunger; the upper end of the pushing assembly is fixedly connected with a connecting rod; the utility model provides a die sinking locking mechanism for die casting machine still includes the clamp plate, and the lantern ring is installed to the one end of clamp plate, and the die-casting plunger is located to lantern ring cover, and the other end fixed connection of clamp plate moves down to pushing away the clamp plate through the lug and moving down after the preset distance at the die-casting plunger for it moves down to push away the subassembly through the connecting rod drive.

Furthermore, the fixed die comprises a first fixing part and a second fixing part which are integrally formed, the first fixing part is positioned in front of and on the left side of the second fixing part, and the sliding connecting plate is positioned on the right side of the first fixing part; the die cavity is arranged on the left side wall of the first fixing part, and the first push plate is abutted against the right side wall of the first fixing part in an initial state: the movable mold comprises a first movable part and a second movable part which are integrally formed; the first movable part is positioned at the front side of the second movable part, the first movable part is positioned at the left side of the first fixed part, the front end of the first movable part is fixedly connected with a support plate extending rightwards, the sliding connection plate is slidably arranged on the support plate along the front-back direction, and the second movable part is positioned at the left side of the second fixed part; the die opening and closing mechanism for the die casting machine further comprises a first transmission mechanism, a second transmission mechanism and an impact mechanism; the first transmission mechanism is configured to drive the jacking mechanism to move backwards in the horizontal direction when the pressure maintaining plunger is pulled out of the die-casting pipeline until the first push plate abuts against the second movable part and the second push plate abuts against the second fixed part; the second transmission mechanism is configured to enable the pushing assembly to rotate around an axis extending in the left-right direction in the process that the pushing mechanism moves backwards in the horizontal direction, and enable the pushing assembly to rotate 180 degrees around the axis extending in the left-right direction when the pressure-retaining plunger is completely pulled out of the die-casting pipeline; the striking mechanism is used for striking the movable die after the pushing assembly rotates 180 degrees.

Further, the die opening and closing mechanism for the die casting machine further comprises a connecting rod, a sliding plate and a limiting assembly; the connecting rod is vertically arranged, and the lower end of the connecting rod is fixedly connected with the pressure maintaining plunger; the sliding plate is horizontally arranged, is positioned above the pressing plate, can be slidably sleeved on the connecting rod along the vertical direction, is provided with a sleeve hole extending along the left-right direction, and the die-casting plunger penetrates through the sleeve hole. The pressing plate is provided with a supporting seat; the supporting seat is fixedly arranged on the upper surface of the pressing plate; the first transmission assembly comprises a first screw rod, a rack, a first gear and a sliding seat. The first screw rod is horizontally arranged in the front-rear direction and can be rotatably arranged on the supporting seat around the axis of the first screw rod; the rack is horizontally arranged in the left and right direction and is fixedly connected with the sliding plate; the first gear is sleeved at the front end of the first screw rod through a one-way bearing, is meshed with the rack and is configured to drive the first screw rod to rotate when the rack moves rightwards. The rear end fixed connection of clamp plate has the level to set up the extension board, is provided with the guide way on the extension board, and the guide way extends along the fore-and-aft direction, and the sliding seat sets up along guide way slidable, the upper end and the sliding seat fixed connection of connecting rod, be provided with first screw hole on the sliding seat, the sliding seat is located first screw rod and is cooperated with first screw hole spiral through first screw hole cover, and the sliding seat slides along the guide way backward when first screw rod rotates.

Further, the pushing assembly comprises a right-angle triangular block and a semicircular ring; the number of the right-angle triangular blocks is two, a vertical surface is arranged on each right-angle triangular block, and the vertical surfaces of the two right-angle triangular blocks are arranged oppositely; the number of the semicircular rings is two, each semicircular ring extends from the top to the bottom of one right-angle triangular block and is positioned on the front side of the right-angle triangular block, and a semicircular sliding groove is formed in each semicircular ring; the lower end of the connecting rod is fixedly connected with a sliding column, and two ends of the sliding column are respectively inserted into the two semi-ring sliding grooves; the second transmission assembly comprises a rotating wheel and a fixed rack; the fixed rack is arranged along the front-back direction and is fixedly arranged on the fixed die; two limiting sliding grooves are formed in the vertical surface of each right-angle triangular block, and each limiting sliding groove is in the vertical direction in the initial state; the rotating wheel is arranged between the two right-angle triangular blocks, the lower side of the rotating wheel is meshed with the fixed rack, a plurality of clamping blocks are arranged on the rotating wheel, and each clamping block is inserted into one limiting sliding groove and arranged along the limiting sliding groove in a sliding mode. The die opening and closing mechanism for the die casting machine further comprises a limiting assembly, and the limiting assembly is configured to limit rotation of the rotating wheel in an initial state.

Further, the limiting assembly comprises a second screw, a toothed plate, a second gear and a moving rack; the second screw rod is vertically arranged, the lower end of the second screw rod is rotatably arranged on the fixed rack around the axis of the second screw rod, and the pressing plate is slidably and rotatably sleeved on the second screw rod; the toothed plate is fixedly arranged on the sliding plate; the second gear is rotatably arranged at the upper end of the second screw rod through a one-way bearing, is meshed with the toothed plate and is configured to drive the second screw rod to rotate when the toothed plate moves rightwards; the movable rack is connected to the fixed die in a sliding mode in the vertical direction, is horizontally arranged and extends in the front-back direction, a second threaded hole is formed in the front end of the movable rack, the movable rack is sleeved on the second screw through the second threaded hole and is in spiral fit with the first threaded hole, the movable rack is meshed with the upper side of the rotating wheel in the initial state, and when the second screw rotates, the movable rack slides upwards along the second screw.

Further, the second moving part of the movable mold extends rightward until contacting with a side wall of the second fixing part of the fixed mold; the impact mechanism comprises a vertical groove and an impact block; the vertical groove is arranged on the semi-circular ring, is in a vertical direction in an initial state and is communicated with the lower end of the semi-circular sliding groove; the impact block is arranged on the right-angle triangular block and is positioned at the top of the right-angle triangular block in an initial state so as to impact the movable die after the pushing assembly turns over for 180 degrees.

Further, one side of the slider towards the right-angle triangular blocks is a smooth cambered surface, through holes communicated with each other are formed in the two right-angle triangular blocks, connecting rods are mounted in the middle of the left side and the right side of the rotating wheel, and the connecting rods are fixedly connected with the slider and telescopically arranged.

Furthermore, an expansion groove is formed in the extension plate, the expansion groove is formed in the left-right direction, and the right end of the expansion groove is communicated with the rear end of the guide groove; the die opening and closing mechanism for the die casting machine further comprises a clamping and stopping mechanism, and the clamping and stopping mechanism comprises a barrier plate and a pull column; the barrier plate blocks the communication position of the expansion slot and the guide slot in an initial state; the pull column is fixedly connected with the barrier plate.

Further, the relative one side of movable mould and cover half all is provided with the guide sand grip, and the guide sand grip extends along the fore-and-aft direction, all is provided with the guide groove on first push pedal and the second push pedal, and first push pedal and second push pedal pass through the guide groove and slide along the guide sand grip.

The invention has the beneficial effects that: according to the die opening and closing mechanism for the die casting machine, in the process of casting, the die locking force between the movable die and the fixed die can be increased through the action of the pushing assembly and the spring telescopic rod, so that the movable die and the fixed die are attached more tightly, and the phenomenon that molten metal splashes or overflows due to the fact that a gap is generated between the movable die and the fixed die due to insufficient die locking force when the molten metal enters a die is avoided.

Further, can change the effort direction of spring telescopic link to movable mould and cover half through the position that removes the top subassembly when needs die sinking to make the clamping force become the die sinking power, the top subassembly can overturn under the effect of second drive assembly simultaneously, through setting up striking mechanism, makes the top subassembly upset half turn back strike the movable mould downwards, makes the movable mould vibrations, produces certain dislocation with the cover half, more makes things convenient for the movable mould to open with the cover half.

Furthermore, by arranging the clamping and stopping mechanism, the size of the opened die can be manually adjusted during die opening, so that the condition that the casting is too small and the opening is large to cause the casting to fall off is prevented, or the condition that the casting is too large and the opening is small to cause the casting not to be taken out is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a die opening and clamping mechanism for a die casting machine according to the invention;

FIG. 2 is a front view of an embodiment of a die opening and clamping mechanism for a die casting machine of the present invention;

FIG. 3 is a schematic structural diagram of a die opening and closing mechanism for a die casting machine, with movable and fixed dies removed, according to the present invention;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a partial schematic structural view of a second transmission assembly of the die opening and clamping mechanism for the die casting machine in an initial state according to the invention;

FIG. 7 is a schematic structural diagram of a first transmission mechanism of a die opening and clamping mechanism for a die casting machine according to the invention;

FIG. 8 is a schematic view of a partial state of the ejecting assembly of the die opening and clamping mechanism of the die casting machine turning 180 degrees;

FIG. 9 is a schematic view of a stop plate of a clamping mechanism of a die opening and clamping mechanism of a die casting machine in a state of communication between an expansion groove and a guide groove;

fig. 10 is a schematic view showing a state in which a connecting rod of a die opening and clamping mechanism for a die casting machine according to the present invention enters an expansion groove.

In the figure: 100. die casting a plunger; 101. a bump; 110. die casting the pipeline; 120. a pressure maintaining plunger; 121. a connecting rod; 200. moving the mold; 201. a sliding connection plate; 202. a support plate; 210. fixing a mold; 220. a first push plate; 221. a second push plate; 230. a spring telescopic rod; 240. a slider; 300. a right-angle triangular block; 301. an impact block; 302. a semicircular ring; 303. a semi-ring chute; 304. a vertical slot; 310. a sliding plate; 311. a rack; 312. a toothed plate; 320. pressing a plate; 321. a collar; 330. a connecting rod; 340. a sliding seat; 350. a first screw; 351. a first gear; 360. fixing a rack; 361. a moving rack; 362. a second screw; 363. a second gear; 370. a rotating wheel; 371. a clamping block; 380. a supporting seat; 400. pulling the column; 410. a barrier plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an embodiment of a die opening and clamping mechanism for a die casting machine of the present invention, as shown in fig. 1 to 10, the die opening and clamping mechanism for the die casting machine includes a fixed plate, a fixed die 210, a movable die 200, a driving mechanism, an injection mechanism, a sliding connection plate 201, a jacking mechanism, and a die opening mechanism. The fixed plate is fixedly arranged. The fixed mold 210 is fixedly installed on the fixing plate, and a mold cavity is formed in the fixed mold 210. The movable mold 200 is located at the left side of the fixed mold 210, the movable mold 200 is slidably installed on the fixed plate along the left-right direction, and the movable mold 200 is provided with a mold core matched with the mold cavity to form a mold. The driving mechanism is used for driving the movable die 200 to move rightwards so as to carry out die closing action. The injection mechanism includes a die cast tube 110, a die cast plunger 100, and a pressure holding plunger 120. The die-casting pipe 110 is fixedly installed on the fixing plate, and is communicated with the mold cavity, for filling molten metal, specifically, the die-casting pipe 110 includes a horizontal pipe and a vertical pipe that are communicated with each other. The die-casting plunger 100 is movably disposed in an up-down direction, and is configured to move downward to squeeze the molten metal in the die-casting pipe 110 after the molten metal is filled in the die-casting pipe 110; the pressure maintaining plunger 120 is horizontally disposed to push the molten metal into the die, and a first driving member for driving the die-casting plunger 100 to move up and down and a second driving member for driving the die-casting plunger 100 to move left and right are disposed outside the die opening and clamping mechanism of the die-casting machine in this embodiment. The molten metal is cooled after entering the mold to form a casting.

The slide connecting plate 201 is fixedly connected to the movable mold 200 in the left-right direction, and is located at the right side of the fixed mold 210. The pushing mechanism comprises a pushing assembly, a first pushing plate 220 and a second pushing plate 221. The pushing assembly is located between the fixed mold 210 and the sliding connection plate 201 and is slidably arranged along the up-down direction, and a projection plane of the outer contour of the pushing assembly in the front-back direction is a trapezoid with a large upper end and a small lower end. The first push plate 220 and the second push plate 221 are respectively arranged on the left side and the right side of the pushing assembly, one opposite sides of the first push plate 220 and the second push plate 221 are respectively connected with a sliding block 240 through a spring telescopic rod 230, the sliding block 240 is in sliding connection with the pushing assembly, one sides, far away from each other, of the first push plate 220 and the second push plate 221 are respectively abutted against the fixed die 210 and the sliding connection plate 201, so that after the die assembly action is completed, the first push plate 220 and the second push plate 221 are pushed outwards through the two spring telescopic rods 230 when the pushing assembly moves downwards, the pre-tightening force of the spring telescopic rods 230 is increased, the pre-tightening force between the movable die 200 and the fixed die 210 is increased, and the die set is prevented from generating gaps so that molten metal can be leaked. The mold opening mechanism is used for urging the movable mold 200 to be separated from the fixed mold 210 after mold closing is completed.

In the present embodiment, a boss 101 is mounted on the upper portion of the die-cast plunger 100. The upper end of the pushing assembly is fixedly connected with a connecting rod 330. The utility model provides a die sinking clamping mechanism for die casting machine still includes clamp plate 320, and the lantern ring 321 is installed to the one end of clamp plate 320, and die-casting plunger 100 is located to the lantern ring 321 cover, and the other end fixed connection of clamp plate 320 is in the upper end of connecting rod 330 for push clamp plate 320 through lug 101 and move down after die-casting plunger 100 moves down to the default distance, and then drive the top through connecting rod 330 and push the subassembly and move down.

In this embodiment, the fixed mold 210 includes a first fixing portion and a second fixing portion integrally formed, the first fixing portion is located at the front and left side of the second fixing portion, and the sliding connection plate 201 is located at the right side of the first fixing portion. The mold cavity is located on the left side wall of the first fixing portion, and the first push plate 220 is abutted against the right side wall of the first fixing portion in the initial state. The movable mold 200 includes a first movable portion and a second movable portion that are integrally molded. The first movable part is arranged at the front side of the second movable part, the first movable part is arranged at the left side of the first fixing part, the front end of the first movable part is fixedly connected with a support plate 202 extending rightwards, a sliding connection plate 201 is slidably arranged on the support plate 202 along the front-back direction, and the second movable part is arranged at the left side of the second fixing part.

The die opening and closing mechanism for the die casting machine further comprises a first transmission mechanism, a second transmission mechanism and an impact mechanism. The first transmission mechanism is configured to drive the pushing mechanism to move backwards in the horizontal direction when the pressure-retaining plunger 120 is pulled out from the die-casting pipe 110 until the first push plate 220 abuts against the second movable portion and the second push plate 221 abuts against the second fixed portion, at this time, the first push plate 220 starts to apply a leftward acting force to the second movable portion of the movable mold 200, so that the second movable portion moves leftward and is separated from the fixed mold 210, thereby opening the mold. The second transmission mechanism is configured to cause the pushing assembly to rotate around an axis extending in the left-right direction during the process that the pushing mechanism moves backward in the horizontal direction, and to cause the pushing assembly to rotate 180 degrees around an axis extending in the left-right direction when the pressure-retaining plunger 120 is completely pulled out from the die-casting pipeline 110, and the striking mechanism is configured to strike the movable mold 200 after the pushing assembly rotates 180 degrees, so as to further generate vibration between the movable mold 200 and the fixed mold 210, so that the movable mold 200 is separated from the fixed mold 210.

In this embodiment, the die opening and clamping mechanism for the die casting machine further comprises a connecting rod 121, a sliding plate 310 and a limiting assembly. The connecting rod 121 is vertically arranged, and the lower end of the connecting rod is fixedly connected with the pressure maintaining plunger 120. The sliding plate 310 is horizontally disposed above the pressing plate 320, and slidably sleeved on the connecting rod 121 along the up-down direction, a sleeve hole extending along the left-right direction is formed in the sliding plate 310, and the die-casting plunger 100 penetrates through the sleeve hole, so that the sliding plate 310 and the pressing plate 320 synchronously move up and down. The pressing plate 320 is provided with a support seat 380. The support base 380 is fixedly mounted to the upper surface of the platen 320. The first transmission assembly includes a first screw 350, a rack 311, a first gear 351, and a sliding seat 340. The first screw 350 is horizontally disposed and extends in the front-rear direction, and the first screw 350 is rotatably mounted to the support block 380 around its axis. The rack 311 is horizontally disposed in the left-right direction and is fixedly connected to the sliding plate 310. The first gear 351 is sleeved at the front end of the first screw 350 through a one-way bearing, and is engaged with the rack 311, and configured to drive the first screw 350 to rotate when the rack 311 moves rightwards. The rear end fixed connection of clamp plate 320 sets up the extension board horizontally, be provided with the guide way on the extension board, the guide way extends along the fore-and-aft direction, sliding seat 340 sets up along the guide way slidable, the upper end and the sliding seat 340 fixed connection of connecting rod 330, be provided with first screw hole on the sliding seat 340, sliding seat 340 locates first screw rod 350 and cooperates with first screw hole spiral through first screw hole cover, sliding seat 340 slides backward along the guide way when first screw rod 350 rotates, sliding seat 340 drives the top push subassembly through connecting rod 330 and moves backward simultaneously, until first push pedal 220 slide to contact with the second removal portion of movable mould 200, second push pedal 221 slides to contact with the second fixed part of cover half 210.

In this embodiment, the pushing assembly includes a right angle triangular block 300 and a semi-circular ring 302. The right-angle triangular blocks 300 are two in number, a vertical surface is arranged on each right-angle triangular block 300, and the vertical surfaces of the two right-angle triangular blocks 300 are arranged oppositely. The semicircle ring 302 is two, and every semicircle ring 302 extends to its bottom from the top of a triangle piece 300 in right angle, and is in the front side of triangle piece 300 in right angle, is provided with semi-ring spout 303 on the semicircle ring 302. The lower end of the connecting rod 330 is fixedly connected with a sliding column, the left end and the right end of the sliding column are respectively inserted into the two semi-ring sliding grooves 303, and the sliding block 240 slides along the semi-ring sliding grooves 303 when the pushing assembly rotates. The second transmission assembly includes a rotating wheel 370 and a fixed rack 360. The fixed rack bar 360 is disposed in a front-rear direction and is fixedly installed in the fixed mold 210. Two limiting sliding grooves are formed in the vertical surface of each right-angled triangular block 300, each limiting sliding groove is located in the vertical direction in the initial state, the rotating wheel 370 is located between the two right-angled triangular blocks 300, the lower side of the rotating wheel is meshed with the fixed rack 360, a plurality of clamping blocks 371 are arranged on the rotating wheel 370, each clamping block 371 is inserted into one limiting sliding groove and slidably arranged along the limiting sliding groove, when the pushing assembly moves downwards, the rotating wheel 370 ascends relative to the pushing assembly along the limiting sliding grooves through the plurality of clamping blocks 371, the rotating wheel and the fixed rack 360 are fixed, and the rotating wheel 370 cannot rotate relative to the pushing assembly. So that the rotating wheel 370 is always engaged with the fixed rack 360 when the pushing assembly moves downwards, and the synchronous pushing assembly is driven to rotate by the gear when the pushing assembly moves backwards.

A die opening and closing mechanism for a die casting machine further includes a limit assembly configured to limit rotation of the rotating wheel 370 in an initial state.

In this embodiment, the limiting assembly includes a second screw 362, a toothed plate 312, a second gear 363, and a moving rack 361. The second screw 362 is vertically disposed, a lower end of the second screw 362 is rotatably mounted to the fixed rack 360 around an axis thereof, and the pressing plate 320 is slidably and rotatably sleeved on the second screw 362. The toothed plate 312 is fixedly mounted to the sliding plate 310. The second gear 363 is rotatably mounted to an upper end of the second screw 362 through a one-way bearing, and is engaged with the tooth plate 312, and configured to rotate the second screw 362 when the tooth plate 312 moves rightward. The movable rack 361 is slidably connected to the fixed mold 210 in the up-down direction, horizontally disposed and extended in the front-back direction, a second threaded hole is formed in the front end of the movable rack 361, the movable rack 361 is sleeved on the second screw 362 through the second threaded hole and is spirally matched with the first threaded hole, the movable rack 361 is meshed with the upper side of the rotating wheel 370 in an initial state to limit the rotation of the rotating wheel 370, and when the second screw 362 rotates, the movable rack 361 slides upwards along the second screw 362 to release the limit of the movable rack 361 on the rotating wheel 370.

In the present embodiment, the second moving part of the movable mold 200 extends rightward until contacting a sidewall of the second fixing part of the fixed mold 210. The striking mechanism comprises a vertical slot 304 and a striking block 301. The vertical slot 304 is disposed on the semi-circular ring 302, the vertical slot 304 is in a vertical direction in an initial state and is communicated with the lower end of the semi-circular sliding slot 303, when the pushing assembly is turned over by 180 degrees, the sliding column slides into the vertical slot 304 along the semi-circular sliding slot 303, and at this time, the pushing assembly falls down due to the pushing of the spring expansion rods 230 on both sides because the pushing assembly has a falling space. The impact block 301 is arranged on the right-angle triangular block 300, and the impact block 301 is positioned at the top of one right-angle triangular block 300 in an initial state, so that the impact block 301 impacts the movable mold 200 after the pushing assembly turns over for 180 degrees, and the movable mold 200 is conveniently separated from the fixed mold 210.

In this embodiment, one side of the sliding block 240 facing the right triangle 300 is a smooth arc surface, so that the sliding block 240 can slide along the left and right sides of the pushing assembly. The two right-angle triangular blocks 300 are provided with communicated through holes, the middle parts of the left side and the right side of the rotating wheel 370 are respectively provided with a connecting rod 121, and the connecting rods 121 and the sliding block 240 are fixedly connected and telescopically arranged, so that the sliding block 240, the first push plate 220 and the second push plate 221 can synchronously move in the front-back direction along with the pushing assembly.

In this embodiment, still be provided with the expansion groove on the extension board, the expansion groove sets up along left and right direction, and the right-hand member communicates with the rear end of guiding groove. The utility model provides a die sinking clamping mechanism for die casting machine still includes and stops the mechanism, stops the mechanism and includes barrier plate 410 and draws post 400. The barrier plate 410 blocks the communication between the expansion slot and the guide slot in the initial state. The pull post 400 is fixedly connected with the baffle, and when the distance between the mold core and the mold cavity needs to be further increased during mold opening, the pull post 400 is pulled to separate the barrier plate 410 from the communication position of the expansion groove and the guide groove, so that the two spring expansion rods 230 are released.

In this embodiment, the opposite sides of the movable mold 200 and the fixed mold 210 are provided with guide ribs extending in the front-rear direction, the first push plate 220 and the second push plate 221 are provided with guide grooves, and the first push plate 220 and the second push plate 221 slide along the guide ribs through the guide grooves, so that the first push plate 220 and the second push plate 221 slide in the front-rear direction.

When the die-casting device works, an external driving mechanism is controlled to enable the movable die 200 to move rightwards and be attached to the fixed die 210, then molten metal liquid is added from an opening in the upper end of the die-casting pipeline 110, an external first driving part is started to drive the die-casting plunger 100 to move downwards to extrude the molten metal liquid, the molten metal liquid is pressed into a die formed between the die core and the die cavity through the die-casting pipeline 110, then an external second driving part is started, the pressure maintaining plunger 120 extends leftwards into a horizontal pipeline of the die-casting pipeline 110, and pressure maintaining is carried out on the die. In the descending process of the die-casting plunger 100, when the convex block 101 at the upper end of the die-casting plunger 100 continuously descends after contacting with the upper surface of the pressing plate 320, the sliding plate 310 and the pressing plate 320 are driven to synchronously descend, the pressing plate 320 descends to drive the connecting rod 330 to descend, the connecting rod 330 descends to drive the pushing assembly to descend, the pushing assembly descends to push the sliding block 240 to expand along the left side surface and the right side surface of the pushing assembly, so that the spring telescopic rod 230 contracts to store energy, and the energy stored by the spring telescopic rod 230 is transmitted to the movable mold 200 and the fixed mold 210 through the first pushing plate 220 and the second pushing plate 221, so as to increase the pressing force of the movable mold 200 on the fixed mold 210.

When the mold is required to be opened, the pressure maintaining plunger 120 is pulled out rightwards through the external second driving part, the pressure maintaining plunger 120 drives the sliding plate 310 to slide rightwards through the connecting rod 121, the sliding plate 310 moves rightwards, so that the rack 311 drives the first gear 351 to rotate, the first gear 351 rotates to drive the first screw 350 to rotate, the first screw 350 rotates to drive the sliding seat 340 to move backwards along the first screw 350, the sliding seat 340 moves to drive the pushing assembly to synchronously move backwards through the connecting rod 330, and the pushing assembly drives the rotating wheel 370 to move backwards. Since the sliding plate 310 moves rightwards and drives the toothed plate 312 to move synchronously, the toothed plate 312 moves and drives the second gear 363 to rotate, the second gear 363 drives the second screw 362 to rotate, and the second screw 362 rotates and drives the moving rack 361 to slide upwards along the second screw 362 to be disengaged from the rotating wheel 370. As shown in fig. 8, at this time, the rotating wheel 370 is only meshed with the fixed rack 360, so the rotating wheel 370 also rotates along the moving rack 361 during the backward movement process, and the rotating wheel 370 rotates to drive the pushing assembly to rotate until the sliding seat 340 drives the connecting rod 330 to move to the rearmost side, and at this time, the pushing assembly just rotates half a turn.

When the pushing assembly moves to the rearmost side, since the first pushing plate 220 contacts with the second moving part of the movable mold 200 and the second pushing plate 221 contacts with the second fixed part of the fixed mold 210, the spring telescopic rod 230 applies a leftward acting force to the movable mold 200 to urge the movable mold 200 to move leftward relative to the fixed mold 210, thereby opening the mold. Meanwhile, after the pushing assembly rotates 180 degrees, the sliding column moves to the vertical groove 304 along the half-ring sliding groove 303, so that the pushing assembly is integrally and suddenly descended for a certain distance under the action of the reset force of the spring telescopic rod 230, the impact block 301 impacts the movable die 200, and the movable die 200 and the fixed die 210 are further easier to open.

When the mold is opened, if the mold core and the mold cavity need to be separated further, the pull column 400 can be pulled to separate the blocking plate 410 from the communication position of the expansion slot and the guide slot, so that both the two spring expansion rods 230 are released, and the connecting rod 330 enters the expansion slot and moves along the expansion slot under the reset action of the spring expansion rods 230, so that the movable mold 200 can move to the right for a larger distance.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a die sinking locking mechanism for die casting machine which characterized in that: the device comprises a fixed plate, a fixed die, a movable die, a driving mechanism, an injection mechanism, a sliding connecting plate, a jacking mechanism and a die opening mechanism; the fixing plate is fixedly arranged; the fixed die is fixedly arranged on the fixed plate, and a die cavity is formed in the fixed die; the movable die is positioned on the left side of the fixed die, the movable die is slidably arranged on the fixed plate along the left-right direction, and a die core matched with the die cavity to form a die is arranged on the movable die; the driving mechanism is used for driving the movable die to move rightwards so as to carry out die closing action; the injection mechanism comprises a die-casting pipeline, a die-casting plunger and a pressure maintaining plunger; the die-casting pipeline is fixedly arranged on the fixed plate, is communicated with the die cavity and is used for filling molten metal; the die-casting plunger is movably arranged along the up-down direction and is used for extruding molten metal liquid in the die-casting pipeline; the pressure maintaining plunger is used for pushing the molten metal into the mold;

the sliding connecting plate is fixedly connected with the movable die in the left-right direction and is positioned on the right side of the fixed die; the jacking mechanism comprises a jacking assembly, a first push plate and a second push plate; the pushing assembly is arranged between the fixed die and the sliding connecting plate and can slide along the vertical direction, and the projection surface of the outer contour of the pushing assembly in the front-back direction is a trapezoid with a large upper end and a small lower end; the first push plate and the second push plate are respectively arranged on the left side and the right side of the pushing assembly, one sides of the first push plate and the second push plate, which are opposite to each other, are respectively connected with a slide block through a spring telescopic rod, the slide blocks are in sliding connection with the pushing assembly, and the sides, which are far away from each other, of the first push plate and the second push plate are respectively abutted against the fixed die and the sliding connecting plate;

the mold opening mechanism is used for promoting the movable mold to be separated from the fixed mold after mold closing is finished.

2. The die opening and closing mechanism for the die casting machine according to claim 1, wherein: the upper part of the die-casting plunger is provided with a convex block; the upper end of the pushing assembly is fixedly connected with a connecting rod; the utility model provides a die sinking locking mechanism for die casting machine still includes the clamp plate, and the lantern ring is installed to the one end of clamp plate, and the die-casting plunger is located to lantern ring cover, and the other end fixed connection of clamp plate moves down to pushing away the clamp plate through the lug and moving down after the preset distance at the die-casting plunger for it moves down to push away the subassembly through the connecting rod drive.

3. The die opening and closing mechanism for the die casting machine as claimed in claim 2, wherein: the fixed die comprises a first fixing part and a second fixing part which are integrally formed, the first fixing part is positioned in front of and on the left side of the second fixing part, and the sliding connecting plate is positioned on the right side of the first fixing part; the die cavity is arranged on the left side wall of the first fixing part, and the first push plate is abutted against the right side wall of the first fixing part in an initial state: the movable mold comprises a first movable part and a second movable part which are integrally formed; the first movable part is positioned at the front side of the second movable part, the first movable part is positioned at the left side of the first fixed part, the front end of the first movable part is fixedly connected with a support plate extending rightwards, the sliding connection plate is slidably arranged on the support plate along the front-back direction, and the second movable part is positioned at the left side of the second fixed part; the die opening and closing mechanism for the die casting machine further comprises a first transmission mechanism, a second transmission mechanism and an impact mechanism; the first transmission mechanism is configured to drive the jacking mechanism to move backwards in the horizontal direction when the pressure maintaining plunger is pulled out of the die-casting pipeline until the first push plate abuts against the second movable part and the second push plate abuts against the second fixed part; the second transmission mechanism is configured to enable the pushing assembly to rotate around an axis extending in the left-right direction in the process that the pushing mechanism moves backwards in the horizontal direction, and enable the pushing assembly to rotate 180 degrees around the axis extending in the left-right direction when the pressure-retaining plunger is completely pulled out of the die-casting pipeline; the striking mechanism is used for striking the movable die after the pushing assembly rotates 180 degrees.

4. The die opening and clamping mechanism for the die casting machine according to claim 3, wherein: the device also comprises a connecting rod, a sliding plate and a limiting component; the connecting rod is vertically arranged, and the lower end of the connecting rod is fixedly connected with the pressure maintaining plunger; the sliding plate is horizontally arranged, is positioned above the pressing plate and is sleeved on the connecting rod in a sliding manner along the vertical direction, a sleeve hole extending along the left-right direction is formed in the sliding plate, and the die-casting plunger penetrates through the sleeve hole; the pressing plate is provided with a supporting seat; the supporting seat is fixedly arranged on the upper surface of the pressing plate; the first transmission assembly comprises a first screw rod, a rack, a first gear and a sliding seat; the first screw rod is horizontally arranged in the front-rear direction and can be rotatably arranged on the supporting seat around the axis of the first screw rod; the rack is horizontally arranged in the left and right direction and is fixedly connected with the sliding plate; the first gear is sleeved at the front end of the first screw rod through a one-way bearing, is meshed with the rack and is configured to drive the first screw rod to rotate when the rack moves rightwards; the rear end fixed connection of clamp plate has the level to set up the extension board, is provided with the guide way on the extension board, and the guide way extends along the fore-and-aft direction, and the sliding seat sets up along guide way slidable, the upper end and the sliding seat fixed connection of connecting rod, be provided with first screw hole on the sliding seat, the sliding seat is located first screw rod and is cooperated with first screw hole spiral through first screw hole cover, and the sliding seat slides along the guide way backward when first screw rod rotates.

5. The die opening and clamping mechanism for the die casting machine according to claim 4, wherein: the pushing assembly comprises a right-angle triangular block and a semicircular ring; the number of the right-angle triangular blocks is two, a vertical surface is arranged on each right-angle triangular block, and the vertical surfaces of the two right-angle triangular blocks are arranged oppositely; the number of the semicircular rings is two, each semicircular ring extends from the top to the bottom of one right-angle triangular block and is positioned on the front side of the right-angle triangular block, and a semicircular sliding groove is formed in each semicircular ring; the lower end of the connecting rod is fixedly connected with a sliding column, and two ends of the sliding column are respectively inserted into the two semi-ring sliding grooves; the second transmission assembly comprises a rotating wheel and a fixed rack; the fixed rack is arranged along the front-back direction and is fixedly arranged on the fixed die; two limiting sliding grooves are formed in the vertical surface of each right-angle triangular block, and each limiting sliding groove is in the vertical direction in the initial state; the rotating wheel is positioned between the two right-angled triangular blocks, the lower side of the rotating wheel is meshed with the fixed rack, a plurality of clamping blocks are arranged on the rotating wheel, and each clamping block is inserted into one limiting sliding groove and is arranged along the limiting sliding groove in a sliding manner;

the die opening and closing mechanism for the die casting machine further comprises a limiting assembly, and the limiting assembly is configured to limit rotation of the rotating wheel in an initial state.

6. The die opening and clamping mechanism for the die casting machine according to claim 5, wherein: the limiting assembly comprises a second screw, a toothed plate, a second gear and a movable rack; the second screw rod is vertically arranged, the lower end of the second screw rod is rotatably arranged on the fixed rack around the axis of the second screw rod, and the pressing plate is slidably and rotatably sleeved on the second screw rod; the toothed plate is fixedly arranged on the sliding plate; the second gear is rotatably arranged at the upper end of the second screw rod through a one-way bearing, is meshed with the toothed plate and is configured to drive the second screw rod to rotate when the toothed plate moves rightwards; the movable rack is connected to the fixed die in a sliding mode along the up-down direction, the movable rack is horizontally arranged and extends along the front-back direction, a second threaded hole is formed in the front end of the movable rack, the movable rack is sleeved on the second screw rod through the second threaded hole and is in spiral fit with the first threaded hole, the movable rack is meshed with the upper side of the rotating wheel in the initial state, and when the second screw rod rotates, the movable rack slides upwards along the second screw rod.

7. The die opening and clamping mechanism for the die casting machine according to claim 5, wherein: the second moving part of the movable die extends rightwards until contacting with the side wall of the second fixing part of the fixed die; the impact mechanism comprises a vertical groove and an impact block; the vertical groove is arranged on the semi-circular ring, is in a vertical direction in an initial state and is communicated with the lower end of the semi-circular sliding groove; the impact block is arranged on the right-angle triangular block and is positioned at the top of the right-angle triangular block in an initial state so as to impact the movable die after the pushing assembly turns over for 180 degrees.

8. The die opening and closing mechanism for the die casting machine as claimed in claim 5, wherein: one side of the slider towards the right-angle triangular blocks is a smooth cambered surface, through holes communicated with each other are formed in the two right-angle triangular blocks, connecting rods are mounted in the middle of the left side and the right side of the rotating wheel, and the connecting rods are fixedly connected with the slider and telescopically arranged.

9. The die opening and clamping mechanism for the die casting machine according to claim 5, wherein: the extension plate is also provided with an extension groove which is arranged along the left-right direction, and the right end of the extension groove is communicated with the rear end of the guide groove; the die opening and closing mechanism for the die casting machine further comprises a clamping and stopping mechanism, and the clamping and stopping mechanism comprises a barrier plate and a pull column; the barrier plate blocks the communication position of the expansion slot and the guide slot in an initial state; the pull column is fixedly connected with the barrier plate.

10. The die opening and closing mechanism for the die casting machine according to claim 1, wherein: the relative one side of movable mould and cover half all is provided with the guide sand grip, and the guide sand grip extends along the fore-and-aft direction, all is provided with the guide groove in first push pedal and the second push pedal, and first push pedal and second push pedal pass through the guide groove and slide along the guide sand grip.