CN116532626B - Double injection system and die casting machine - Google Patents
Double injection system and die casting machine Download PDFInfo
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- CN116532626B CN116532626B CN202310829289.7A CN202310829289A CN116532626B CN 116532626 B CN116532626 B CN 116532626B CN 202310829289 A CN202310829289 A CN 202310829289A CN 116532626 B CN116532626 B CN 116532626B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2053—Means for forcing the molten metal into the die using two or more cooperating injection pistons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/26—Mechanisms or devices for locking or opening dies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application discloses a double injection system and a die casting machine, wherein the double injection system comprises a pair of injection pipes and a pair of injection assemblies; the injection pipes are bent, the two injection pipes are respectively connected with the tail plate in a rotating way at intervals, and the injection assembly is suitable for being in sealing sliding fit with the inner cavity of the corresponding injection pipe; when the injection work is carried out, the injection assembly is suitable for injecting molten metal into a cavity of a die arranged on one side of the tail plate along the inner cavity of the injection tube; when the die with different sizes is adapted, the injection assembly is suitable for driving the injection tube to rotate around the avoidance groove. The die casting machine comprises the double injection system. The application has the beneficial effects that: through setting up buckling with the injection tube to when the mould of die cavity that the adaptation has different sizes or shapes, can rotate the injection tube, and then change the position and the distance that are used for the head of intercommunication die cavity between two injection tubes and adapt different moulds, compare traditional structure, can effectually improve the commonality of die casting machine.
Description
Technical Field
The application relates to the technical field of metal die casting, in particular to a double injection system and a die casting machine.
Background
A die casting machine is a machine for pressure casting, and is often used for production and processing of automobile parts and the like. The die casting machine can hydraulically jet molten metal into a die under the action of pressure to be cooled and molded, and a solid metal casting can be obtained after the die is opened.
With the development of die casting technology, die casting machines are increasingly used in die casting production of automobile bodies. Because the size of the part product needing die casting molding is larger, the die casting machine generally adopts a double injection system when in use, namely the die casting machine comprises a pair of injection pipelines, thereby effectively reducing the stroke of completely filling the die cavity with the metal liquid and further improving the molding quality of large parts.
However, the existing die casting machine mainly has the following defects when in use:
(1) The distance and the position between two injection pipelines of the double injection system are fixed, so that the die casting machine can only be matched with a forming die of a specific model, and parts with different shapes and sizes are generally difficult to produce by using the same die casting machine.
(2) The clamping force of the movable die plate of the existing die casting machine comes from the dead point limiting force of the toggle connecting rod structure; however, with the use of the die casting machine, the matching precision of the toggle connecting rod structure is reduced due to abrasion, so that the toggle connecting rod structure can be positioned at a dead point, but a certain gap can be generated between the movable die plate and the tail plate, so that the die locking force for production is insufficient, and the production quality of products is reduced.
Disclosure of Invention
One of the objects of the present application is to provide a dual shot system that can accommodate the production of parts of different shapes or sizes.
Another object of the present application is to provide a die casting machine capable of solving at least one of the problems of the background art described above.
In order to achieve the purpose, the application adopts the following technical scheme: a dual shot system includes a pair of shot tubes and a pair of shot assemblies; the injection pipes are bent, the two injection pipes are respectively connected with two avoidance grooves which are arranged on the tail plate at intervals in a rotating way, and the injection assembly is suitable for being in sealing sliding fit with the inner cavities of the corresponding injection pipes; when the injection work is carried out, the injection assembly is suitable for injecting molten metal injected into the injection pipe into a cavity of a die arranged on one side of the tail plate along the inner cavity; when the die with different sizes is adapted, the injection assembly is suitable for driving the injection tube to rotate around the avoidance groove through the driving structure, so that the position of at least one injection tube for communicating the head of the die cavity is changed.
Preferably, the injection tube comprises a head, a transition section, a liquid inlet section and an extension section which are sequentially communicated; the head is parallel to the liquid inlet section and the extension section, and the transition section is obliquely arranged relative to the head; the avoiding groove comprises a rotating section and an avoiding section; the injection tube is in running fit with the rotating section through the liquid inlet section; the transition section is positioned in the avoidance section, and the shape and the size of the avoidance section are matched with the rotation path of the transition section; initially, the injection assembly is located within the extension section so that molten metal can be injected into the liquid inlet section; when the injection work is carried out, the injection assembly is suitable for extruding molten metal in the liquid inlet section into a cavity along the transition section and the head; when the moulds with different sizes are adapted, the injection assembly and the extension section are driven to rotate around the rotation section through the driving structure.
Preferably, the injection assembly comprises a pressing part and a push rod; the extrusion part can be bent, one end of the push rod is connected with the extrusion part, the other end of the push rod is connected with the injection cylinder, and the push rod is suitable for being matched with the injection tube through a driving structure; when the injection work is carried out, the push rod is suitable for driving the extrusion part to hydraulically inject metal into the cavity through the bent inner cavity of the injection tube under the driving of the injection oil cylinder; when the mold with different sizes is adapted, the push rod is driven by the injection oil cylinder to drive the injection tube to rotate through the driving structure.
Preferably, an included angle between the axial direction of the transition section and the axial direction of the head or the liquid inlet section is alpha, and the value of the included angle alpha is 15-60 degrees; the extrusion part comprises a plurality of extrusion blocks which are flexibly connected with each other, the extrusion blocks are spherical, and the extrusion blocks are in sealing sliding fit with the inner wall of the injection tube; the extrusion part is connected with the push rod through the extrusion block at the first end, and the extrusion part extrudes molten metal into the cavity along the transition section and the head through the extrusion block at the second end.
Preferably, the driving structure comprises a driving component arranged on one end side part of the push rod close to the extrusion part, and a driving groove arranged on the inner wall of the extension section; the push rod is suitable for being in sliding fit with the driving groove through the driving assembly; the driving groove comprises a non-deflection section and a deflection section, and the deflection section is close to one end of the extension section, which is far away from the liquid inlet section; the push rod is suitable for sliding along the non-deflection section through the driving assembly when in injection operation; the push rod is suitable for driving the injection tube to rotate unidirectionally by sliding the driving assembly along the deflection section when adapting to different dies.
Preferably, the driving assembly comprises a driving block which is elastically and slidably matched along the radial direction of the push rod; the driving groove comprises a plurality of first groove sections and a plurality of second groove sections; the first groove sections extend along the axial direction of the extension section, and a plurality of the first groove sections are arranged on the inner wall of the extension section at equal intervals along the circumferential direction; the second groove section is positioned at one end of the extension section far away from the liquid inlet section, and adjacent first groove sections are communicated through the inclined second groove section to form the deflection section; the positions where the adjacent two first groove sections are communicated with the corresponding second groove sections are respectively a point A and a point B; setting the depth of the point A to be equal to the depth of the corresponding end of the second groove section, wherein the depth of the point B is larger than the depth of the corresponding end of the second groove section, and the depth of the groove section extending to the position close to the point A in the first groove section is smaller than the depth of the point A; when the injection work is carried out, the driving block is suitable for sliding along the position of the first groove section away from the second groove section; when different molds are adapted, the driving block slides towards the deflection section in a first direction, and the driving block is suitable for sliding from the point A of one first groove section to the point B of the adjacent first groove section along the corresponding second groove section so as to drive the injection tube to rotate by a set angle; when the driving block slides from the point B of the first groove section to the second direction of the deflection section, the driving block is suitable for sliding from the point B to the point A along the single first groove section so as to keep the injection tube stationary.
Preferably, a pair of liquid injection components which are in sliding fit with the injection tube are fixedly arranged on one side of the tail plate, which is away from the die; the side wall of the liquid injection part is provided with a liquid injection port with an upward opening; the liquid inlet section of the injection tube is provided with a plurality of liquid inlets along the circumferential direction; when the injection tube rotates at any set angle, the liquid inlet at the uppermost part of the liquid inlet section is always aligned with the liquid injection port, and the rest liquid inlet is in sealing fit with a plurality of sealing assemblies arranged on the inner side of the liquid injection part, so that the formed metal liquid is suitable for entering the liquid inlet section from the liquid injection port along the uppermost liquid inlet.
Preferably, the liquid inlet is obliquely arranged at two sides along the circumferential direction; the sealing assembly comprises a blocking block which is elastically matched in a sliding manner along the radial direction of the inner wall of the liquid injection part, and the two sides of the blocking block along the circumferential direction are also obliquely arranged; the blocking piece is suitable for being in sealing fit with the corresponding liquid inlet in an elastic way under the action of elasticity, and at the moment, the front end of the blocking piece is flush with the side wall of the inner cavity of the liquid inlet section.
The die casting machine comprises the double injection system, a tail plate fixedly arranged on the frame, and a movable die plate slidably arranged on the frame; the movable template comprises a push plate and a pressing plate, and the push plate is elastically connected with the pressing plate through a third spring; a locking hole is formed in one side, opposite to the movable template, of the tail plate, and a locking assembly is arranged in one side, opposite to the tail plate, of the pressing plate; the movable template is driven by the die clamping mechanism to be suitable for performing a die clamping process comprising a first action and a second action; wherein, the first action: the pushing plate is suitable for pushing the pressing plate to prop against the tail plate through the third spring, and the locking assembly is inserted into the locking hole at the moment; a second action: the pushing plate compresses the third spring to prop against the pressing plate, and then the pushing plate is suitable for driving the locking assembly to be locked with the locking hole in a clamping mode.
Preferably, the locking hole is conical, and the opening of the locking hole is provided with a jack; a first cam sleeve is arranged on one side of the push plate opposite to the pressure plate; the locking assembly comprises a mounting seat, a torsion spring and a locking block; the mounting seat is fixed on the pressing plate, the locking block is in a V shape matched with the section of the locking hole, and the locking block is rotationally connected with the mounting seat through a rotating shaft with one fixed end; the torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected with the rotating shaft and the mounting seat; one end of the rotating shaft, which is far away from the locking block, is suitable for extending into a through hole arranged on the pressing plate and is fixed with a second cam sleeve; when the first action is performed, the locking block is suitable for extending into the locking hole along the jack, and the first cam sleeve and the second cam sleeve are spaced at the moment; when the second action is carried out, the first cam sleeve is suitable for extruding the second cam sleeve, and then the locking block is driven to compress the torsion spring and rotate circumferentially around the locking hole to be mutually clamped.
Compared with the prior art, the application has the beneficial effects that:
(1) Through setting up buckling with the injection tube to when the mould of die cavity that the adaptation has different sizes or shapes, can rotate the injection tube, and then change the position and the distance that are used for the head of intercommunication die cavity between two injection tubes and adapt different moulds, compare traditional structure, can effectually improve the commonality of die casting machine.
(2) Through the rotation of penetrating the pipe with pressing and penetrating the subassembly through pressing to the injection of molten metal and realizing, can improve the switching efficiency of penetrating the machine.
(3) Through dividing the movable mould board into push pedal and clamp plate to when carrying out the compound die, can lock clamp plate and tailboard through locking subassembly and locking hole, and then when compound die mechanism leads to the compound die position to change because wearing and tearing, through the locking of locking subassembly and locking hole, can guarantee that the clamp plate can produce sufficient clamping force in order to guarantee the normal production of the product in the mould to the tailboard.
Drawings
Fig. 1 is a schematic view of a partial structure of a die casting machine according to the present invention.
FIG. 2 is a schematic diagram showing an exploded view of the tail plate and the dual shot system according to the present invention.
FIG. 3 is a schematic cross-sectional view of the tailgate of the present invention.
FIG. 4 is a schematic cross-sectional view of a medium pressure jet tube according to the present invention.
Fig. 5 is a schematic structural view of the injection assembly of the present invention.
Fig. 6 is a schematic diagram of a matching state of the injection assembly and the injection tube when the injection is performed.
Fig. 7 is a schematic diagram of a matching state of an injection assembly and an injection tube when injection is performed.
Fig. 8 is a schematic view of a mounting structure of a driving assembly according to the present invention.
Fig. 9 is a schematic diagram showing a state of the driving assembly and the driving slot in the present invention.
Fig. 10 is a schematic diagram of a second state of the driving assembly and the driving slot in the present invention.
Fig. 11 is a schematic diagram of a driving assembly and a driving slot in the present invention.
Fig. 12 is a schematic diagram showing a state of the driving assembly and the driving slot in the present invention.
FIG. 13 is a schematic diagram showing the positions of the heads and the avoiding grooves of two injection tubes in the present invention.
Fig. 14 is a schematic cross-sectional view of a medium pressure tube according to the present invention.
FIG. 15 is a schematic view of the fitting structure of the sealing assembly and the injection tube according to the present invention.
Fig. 16 is a schematic view showing an exploded state of the movable die plate in the present invention.
Fig. 17 is a schematic view showing an exploded state of the locking assembly in the present invention.
Fig. 18 is a schematic view showing an internal structure of the locking seat according to the present invention.
Fig. 19 is a schematic view showing a state of the movable platen and the tail plate in the mold closing process according to the present invention.
Fig. 20 is a second schematic diagram of a closing process of the movable platen and the tail plate according to the present invention.
Fig. 21 is a third schematic view showing a state of the movable platen and the tail plate in the mold closing process according to the present invention.
Fig. 22 is a schematic diagram of a matching structure of the locking block and the mounting base in the present invention.
In the figure: the tie bar 1, the tail plate 2, the escape groove 21, the rotation section 211, the escape section 212, the liquid injection member 22, the liquid injection port 220, the first installation groove 221, the seal assembly 23, the block 231, the first spring 232, the injection tube 3, the head 31, the transition section 32, the liquid inlet section 33, the liquid inlet 330, the extension section 34, the driving groove 340, the first groove section 341, the second groove section 342, the injection assembly 4, the push rod 41, the second installation groove 410, the pressing section 42, the pressing block 420, the driving assembly 43, the driving block 431, the second spring 432, the movable mold plate 5, the first cam sleeve 511, the push plate 51, the pressing plate 52, the perforated hole 520, the third spring 53, the movable mold 610, the fixed mold 620, the locking assembly 7, the installation seat 71, the blocking groove 710, the locking block 72, the rotating shaft 721, the second cam sleeve 722, the stopper 723, the torsion spring 73, the locking seat 8, the locking hole 81, and the insertion hole 82.
Detailed Description
The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
One aspect of the present application provides a dual shot system, as shown in fig. 1-7 and 13, wherein a preferred embodiment includes a pair of shot tubes 3 and a pair of shot assemblies 4. The injection tube 3 can be bent, and the two injection tubes 3 are respectively connected with the two avoidance grooves 21 which are arranged on the tail plate 2 at intervals in a rotating way, and the avoidance grooves 21 can provide avoidance space for the injection tube 3 with a bending structure when the injection tube 3 rotates so as to avoid interference of the rotation of the injection tube 3. The two injection assemblies 4 can be respectively in sealing sliding fit with the inner cavities of the corresponding injection tubes 3. When the injection work is performed, molten metal can be poured into the injection tube 3, so that the injection assembly 4 can inject the molten metal poured into the injection tube 3 into a cavity of a die arranged on one side of the tail plate 2 along the cavity by sliding along the cavity of the injection tube 3, so as to be used for forming a required product. When different products need to be molded, namely, the moulds with different sizes are adapted, the mould which is currently installed on the tail plate 2 can be disassembled, then the position which needs to be adjusted by the injection tube 3 is obtained according to the cavity structure of the mould which needs to be replaced, then the injection assembly 4 is driven to drive the injection tube 3 to rotate around the avoiding groove 21 through the driving structure, then the position of the head 31 which is used for communicating with the cavity by changing at least one injection tube 3 is changed to meet the cavity of the mould which needs to be replaced, and finally the mould which needs to be replaced is installed on the tail plate 2 and communicated with the head 31 of the injection tube 3.
It will be appreciated that both shot channels of a conventional dual shot system are straight tube construction, so that the size of the cavity that can be accommodated is limited. As shown in fig. 13, in this embodiment, two injection tubes 3 are bent, so that the two injection tubes 3 can obtain a plurality of different combination positions and spacing distances of the heads 31 of the two injection tubes 3 through synchronous or different-angle rotation of one or two of the injection tubes, and then a plurality of dies with cavities of different shapes and sizes can be adapted; compared with the traditional mode, the universality of the double injection system can be effectively improved, so that the production cost of the existing diversified parts is reduced.
It can be further understood that, because the injection tube 3 is rotationally connected with the avoiding groove 21 formed in the tail plate 2, when the injection tube 3 is communicated with the cavity of the mold through the head 31, the head 31 of the injection tube 3 is fixed with the mold, so that the rotation of the injection tube 3 can be limited, and the structural stability of the injection tube 3 in the injection process can be ensured.
In this embodiment, as shown in fig. 3, 4, 6 and 7, the avoiding groove 21 includes a rotation section 211 and an avoiding section 212. The injection tube 3 comprises a head 31, a transition section 32, a liquid inlet section 33 and an extension section 34 which are sequentially communicated; the head 31, the liquid inlet section 33 and the extension section 34 are parallel to each other, the transition section 32 is obliquely arranged relative to the head 31, and then a bending structure is formed among the head 31, the transition section 32 and the liquid inlet section 33.
When the injection tube 3 is installed, the injection tube 3 can be in running fit with the rotating section 211 of the avoidance groove 21 through the liquid inlet section 33, and then the transition section 32 of the injection tube 3 can be located in the avoidance section 212, and the shape and the size of the avoidance section 212 can be matched with the rotating path of the transition section 32.
Initially, the injection assembly 4 may be located in the extension section 34, so as to ensure that molten metal can be injected into the liquid inlet section 33, so as to avoid interference of the injection assembly 4 with the injection of the molten metal. When injection is performed, the injection assembly 4 can press molten metal in the liquid inlet section 33 into the cavity along the transition section 32 and the head 31. When adapting to moulds of different sizes, the injection assembly 4 and the extension section 34 can drive the injection tube 3 to rotate around the rotation section 211 through a driving structure.
It will be appreciated that, in theory, the axial direction of the transition section 32 is perpendicular to the axial direction of the head 31 or the inlet section 33, and the adjustment range that can be achieved by rotating the injection tube 3 is the largest. The vertically bent transition section 32 may cause difficulty in sliding the shot assembly 4 along the transition section 32 during the injection process. As shown in fig. 4, an angle α between the axial direction of the transition section 32 and the axial direction of the head 31 or the inlet section 33 may be set, and if the length of the transition section 32 is L, the rotation radius of the head 31 of the injection tube 3, which is adjusted by rotation, may be l·sinα. Therefore, the smoothness of the subsequent injection process can be improved by properly reducing the bending angle between the transition section 32 and the head 31 or the liquid inlet section 33; meanwhile, the length of the transition section 32 is increased to compensate for the reduction of the adjusting range of the injection tube 3 caused by the reduction of the value of the included angle alpha. In general, the angle α may be 15 ° to 60 °, preferably 15 ° to 45 °.
In the present embodiment, as shown in fig. 5 to 7, the injection assembly 4 includes a pressing portion 42 and a push rod 41; the extrusion part 42 is bendable, one end of the push rod 41 is connected with the extrusion part 42, the other end of the push rod 41 is connected with an injection cylinder (not shown), and the push rod 41 can be matched with the extension section 34 of the injection tube 3 through a driving structure. When the injection work is performed, the push rod 41 can drive the extrusion part 42 to hydraulically inject metal into the cavity of the die through the bent inner cavity of the injection tube 3 under the driving of the injection cylinder. When adapting to moulds with different sizes, the push rod 41 can drive the injection tube 3 to rotate around the rotating section 211 through the driving structure under the driving of the injection oil cylinder.
It will be appreciated that the specific structure and installation location of the injection cylinder are common knowledge of those skilled in the art, and are the same as those of the conventional injection system, so they are not shown in the drawings.
It will also be appreciated that the dual shot system of the present application includes two shot assemblies 4, and that the following prior art methods can be used to control the two shot assemblies 4 to ensure their operational consistency.
(1) The corresponding injection oil cylinder can be controlled by adopting an embedded special multi-channel high-speed controller, the high-speed controller can collect the injection stroke, the rod cavity and the rodless cavity pressure of the corresponding single-set injection system at high speed, record the pressure in a special memory card in real time, automatically generate injection pressure, speed and displacement curves, respectively display the pressure, speed and displacement curves of each set of injection system on each curve, automatically calculate key characteristic parameters such as slow speed, fast speed, high-speed starting point, pressure building time and the like of the double-injection system, generate a parameter list, and compare the process data of the double-injection system through the curves and the parameter list to carry out SPC analysis.
(2) The double injection control system takes one set of injection system as a main control object, and the other set of injection system acts along with the main control object, so that position closed-loop control can be added on the basis of injection speed closed-loop, and then the positions of the two sets of material beating systems can be compared in real time, the position deviation is adjusted in real time, and the synchronicity of key parameters such as slow travel, quick starting point and the like of the double injection system is ensured.
(3) The high-speed controller adopts a high-speed interrupt control mode, the control period is 0.25ms, the high-speed controller adopts 1 CPU for control, the data exchange between two sets of injection systems is in seamless connection, the high-frequency response is combined with the closed-loop control servo valve, and the high-speed response simultaneously ensures the consistency of the instruction and the actual value.
In this embodiment, as shown in fig. 5 to 7, the pressing portion 42 includes a plurality of pressing blocks 420 flexibly connected to each other, the pressing blocks 420 have a spherical shape, and the pressing blocks 420 are in sealing sliding fit with the inner wall of the injection tube 3. The extrusion 42 may be connected to the push rod 41 by an extrusion block 420 at a first end, and the extrusion 42 may extrude molten metal into the cavity of the mold along the transition section 32 and the interior cavity of the head 31 by an extrusion block 420 at a second end.
It should be noted that, during injection, all the molten metal in the injection tube 3 needs to be extruded into the cavity of the mold, so as to avoid the occurrence of cooling and agglomeration of the molten metal in the injection tube 3, which reduces the flow performance of the subsequent molten metal. Therefore, in order to adapt to the injection tube 3 with the bending structure, the extrusion block 420 can be set to be spherical, so that the extrusion block 420 can smoothly slide along the bending positions at the two ends of the transition section 32, and then the molten metal can be fully extruded into the cavity of the die along the inner cavity of the injection tube 3.
In this embodiment, there are various connection modes between the adjacent extrusion blocks 420, and only the relative swing between the adjacent extrusion blocks 420 is ensured. It is common to have adjacent squeeze blocks 420 hinged to each other, or to have adjacent squeeze blocks 420 flexibly connected to each other by a steel cable, or the like.
In this embodiment, as shown in fig. 4, 5 and 8 to 12, the driving structure includes a driving component 43 disposed on a side portion of the push rod 41 near one end of the extrusion portion 42, and a driving slot 340 disposed on an inner wall of the extension section 34; the push rod 41 may be slidably engaged with the drive slot 340 by the drive assembly 43. The drive slot 340 includes a non-deflecting section and a deflecting section, the deflecting section being proximate to an end of the extension section 34 remote from the intake section 33. When the injection is performed, the push rod 41 may slide along the non-deflected section of the drive slot 340 by the drive assembly 43 so that the injection tube 3 remains stationary during this process. When adapting to different molds, the push rod 41 can slide along the deflection section of the driving groove 340 through the driving component 43, so as to drive the injection tube 3 to rotate unidirectionally.
It should be noted that there are in theory a myriad of positions at which the injection tube 3 rotates about the rotation section 211, but the structure required to achieve any adjustment of the rotation angle of the injection tube 3 may be relatively complex and not as many dies with corresponding structural and dimensional cavities. Therefore, in order to reduce the design cost and the design difficulty, the angle adjustment of the injection tube 3 may be set to be limited times, that is, the injection tube 3 may be adjusted to rotate multiple times, and each time the injection tube 3 may rotate at a certain angle along a single direction. That is, the number of times of angle adjustment of the injection tube 3 is N, and the angle of each rotation of the injection tube 3 in a single direction is 360 DEG/N.
Specifically, as shown in fig. 8 to 12, the driving assembly 43 includes a driving block 431 elastically slidably fitted in the radial direction of the push rod 41. The driving slot 340 includes a plurality of first slot segments 341 and a plurality of second slot segments 342; the first groove sections 341 extend along the axial direction of the extension section 34, and a plurality of first groove sections 341 are arranged on the inner wall of the extension section 34 at equal intervals along the circumferential direction; the second groove section 342 is located at one end of the extension section 34 far away from the liquid inlet section 33, and the adjacent first groove sections 341 are communicated through the second groove section 342 which is obliquely arranged to form a deflection section, so that the part of the first groove section 341 far away from the second groove section 342 is a non-deflection section.
Two adjacent first groove sections 341 and corresponding second groove sections 342 can be respectively arranged at the point A and the point B; it should be appreciated that points a and B are both located in the first slot segment 341. The depth of point a may be equal to the depth of the corresponding end of the second groove segment 342, the depth of point B is greater than the depth of the corresponding end of the second groove segment 342, and the depth of the groove segment extending from point B to near point a in the first groove segment 341 is less than the depth of point a. Therefore, when the injection work is performed, the driving block 431 can slide along the position, away from the second groove section 342, of the first groove section 341, namely, the non-deflection section, and as the driving block 431 only slides along the first groove section 341 extending axially, the injection tube 3 can be ensured to be kept static in the circumferential direction, and the structural stability of the injection tube 3 in the injection process can be improved. When adapting to different dies, the driving block 431 slides towards the deflection section in a first direction, so that the driving block 431 can slide from the point A of one first groove section 341 to the point B of the adjacent first groove section 341 along the corresponding second groove section 342, and the driving block 431 can drive the injection tube 3 to rotate by a set angle through sliding along the second groove section 342 because the driving block 431 does not deflect in the circumferential direction; when the driving block 431 slides from the point B of the first groove segment 341 to the second direction of the deflection segment, the driving block 431 may slide from the point B to the point a along the single first groove segment 341 so that the platen 3 remains stationary. If the angle to be adjusted of the injection tube 3 is larger than the set angle required by one rotation of the injection tube 3, the above process can be repeated for a plurality of times according to the angle to be adjusted until the rotation angle of the injection tube 3 meets the use requirement.
It can be understood that, as can be seen from the above description, the number of the angular adjustment times of the injection tube 3 is set to N, and the number of the first groove segment 341 and the second groove segment 342 is also N, so that the driving block 431 cooperates with each of the second groove segments 342 to drive the injection tube 3 to rotate at a set angle of 360 °/N; the specific value of N can be selected by those skilled in the art according to actual needs, and is not particularly limited.
Specifically, as shown in fig. 8, a second mounting groove 410 is radially provided on a side wall of one end of the push rod 41 adjacent to the pressing portion 42, and the driving assembly 43 is mounted in the second mounting groove 410. The driving assembly 43 includes a driving block 431 and a second spring 432, the second spring 432 is located inside the second mounting groove 410, two ends of the second spring 432 respectively prop against the bottom of the second mounting groove 410 and the driving block 431, and the driving block 431 can elastically prop against the driving groove 340 through the second spring 432. And in the process of sliding the driving block 431 along the driving groove 340, the driving block 431 can be controlled to slide against the driving grooves 340 with different depths by different deformation amounts of the second spring 432.
For ease of understanding, as shown in fig. 9-12, the inner wall of extension 34 may be expanded into a schematic plan view and a description of one embodiment of the above process may be made.
Assuming that the value of N is 8, the plurality of first groove segments 341 may be numbered #1 to #8 in the circumferential direction.
When pouring molten metal, as shown in fig. 6 and 9, the extruding portion 42 is located in the extending section 34, meanwhile, the driving block 431 on the push rod 41 is located in the first groove section 341 with the number #1, and a certain interval is still present between the driving block 431 and the second groove section 342, so as to avoid sliding between the driving block 431 and the second groove section 342.
When the injection process is performed, as shown in fig. 7 and 9, the push rod 41 may drive the driving block 431 to slide along the first slot segment 341 numbered #1 to a side away from the second slot segment 342.
When adapting to different moulds, a single turn of the shot tube 3 is made to comprise the following process:
(1) As shown in fig. 9 to 10, the push rod 41 may drive the driving block 431 to slide along the first slot segment 341 with the number #1 toward the corresponding a point direction; when the driving block 431 is located at the point a of the first slot segment 341 with the number #1, since the depth of the point a is equal to the depth of the corresponding end of the corresponding second slot segment 342, and the depth of the slot segment extending from the point B to the position close to the point a in the first slot segment 341 is smaller than the depth of the point a, the driving block 431 cannot slide from the point a to the point B of the first slot segment 341 with the number #1, and can only slide from the position a to the position B beyond the point a to the corresponding second slot segment 342. In the process that the driving block 431 slides to the b position along the second groove section 342, the arc length of the driving block 431 sliding relatively along the circumferential direction may be set as X, and then the driving block 431 drives the injection tube 3 to rotate by 180 ° X/(pi R), where R is the inner cavity radius of the injection tube 3.
(2) As shown in fig. 10 to 11, the push rod 41 continues to slide the driving block 431 along the second slot segment 342 to the point B beyond the first slot segment 341 numbered #2 to the position c. In the process of moving the driving block 431 from the b position to the c position, the arc length of the driving block 431 sliding relatively along the circumferential direction may be set as Y, and then the angle at which the driving block 431 drives the injection tube 3 to rotate is 180 ° Y/(pi R), so that the angle at which the driving block 431 slides along the entire second slot section 342 drives the injection tube 3 to rotate is 180 ° (x+y)/(pi R).
(3) As shown in fig. 11 to 12, when the push rod 41 performs one-time angular adjustment to perform the reverse sliding, since the depth of the point B is greater than the depth of the corresponding end of the second groove section 342, the driving block 431 may slide from the point B to the point a along the first groove section 341 with the number #2 until reaching the d position beyond the point a. The shot tube 3 remains stationary during this process.
It will be appreciated that in order to satisfy the depth of point a equal to the depth of the corresponding end of the second groove segment 342, the depth of point B is greater than the depth of the corresponding end of the second groove segment 342, and the depth of the groove segment extending from point B to near point a in the first groove segment 341 is less than the depth of point a. The depth of the second groove section 342 is not uniformly set, and the depth of the second groove section 342 near the point a is deeper, the depth of the second groove section 342 near the point B is shallower, and the depth between the two ends of the second groove section 342 is smoothly changed. So that the driving block 431 can slide along the second mounting groove 410 while compressing the second spring 432 during the sliding of the driving block 431 along the second groove segment 342; when the driving block 431 passes over the second groove section 342 to the B point position, the driving block 431 can slide along the second mounting groove 410 under the elastic force of the second spring 432 to release the second spring 432; when the driving block 431 moves from point B to point a along the single first groove segment 341, the driving block 431 may continue to slide along the second mounting groove 410 under the elastic force of the second spring 432, releasing the second spring 432.
In one embodiment of the present application, as shown in fig. 14, since the injection tube 3 is required to be rotated in order to fit molds having cavities of different shapes and sizes. However, the pouring position of the molten metal is generally unchanged, so in order to meet the rotation requirement of the injection tube 3, a plurality of liquid inlets 330 are required to be arranged on the liquid inlet section 33 of the injection tube 3 along the circumferential direction. When the molten metal is poured, the liquid inlet 330 at a specific position is kept open, and the rest liquid inlets 330 are kept closed. Therefore, when the injection tube 3 rotates, only the liquid inlet 330 of the injection tube 3 can be rotated to a specific position.
It can be understood from the foregoing that the number of the liquid inlets 330 is N. Generally, the pouring of the molten metal is from this to the bottom, and thus, the position where the liquid inlet 330 located at the uppermost position is located can be set to a specific position.
In this embodiment, as shown in fig. 2, 14 and 15, a pair of liquid injection components 22 in sliding fit with the injection tube 3 are fixedly mounted on one side of the tail plate 2 away from the mold, and the liquid injection components 22 not only can guide the molten metal, but also can support the extension section 34 of the injection tube 3 so as to further improve the stability of the mounting structure of the injection tube 3. The uppermost side wall of the liquid injection part 22 is provided with a liquid injection port 220 with an upward opening; the side wall of the pipe section corresponding to the liquid filling port 220 on the liquid inlet section 33 is provided with N liquid inlets 330 along the circumferential direction. When the injection tube 3 rotates by an arbitrary set angle, the liquid inlet 330 positioned at the uppermost part of the liquid inlet section 33 is aligned with the liquid injection port 220 all the time, and the rest of the liquid inlet 330 is in sealing fit with a plurality of sealing assemblies 23 arranged on the inner side of the liquid injection part 22. At this time, molten metal for molding can be poured into the pouring opening 220 and enter the liquid inlet section 33 along the liquid inlet 330 at the uppermost part of the liquid inlet section 33, so that the injection assembly 4 pushes the molten metal into the cavity of the mold for molding.
In this embodiment, as shown in fig. 14 and 15, the liquid inlet 330 is disposed obliquely along both sides of the circumferential direction, so that the cross-sectional shape of the liquid inlet 330 is in an "eight" shape, and the large end of the cross-section of the liquid inlet 330 faces the outside of the liquid inlet section 33. The sealing assembly 23 comprises a blocking block 231 which is elastically and slidably matched along the radial direction of the inner wall of the liquid injection part 22, and both sides of the blocking block 231 along the circumferential direction are also obliquely arranged, so that the cross section shape of the blocking block 231 is in an splayed shape which is matched with the shape of the liquid inlet 330; therefore, the blocking block 231 can be elastically abutted against the corresponding liquid inlet 330 under the action of elasticity, and the front end of the blocking block 231 is flush with the side wall of the inner cavity of the liquid inlet section 33 at the moment, so that interference caused by the blocking block 231 to the sliding of the injection assembly 4 along the inner cavity of the injection tube 3 is avoided, and meanwhile, the penetration of metal liquid into a gap between the liquid inlet 330 and the blocking block 231 can also be avoided.
Specifically, as shown in fig. 15, the inner wall of the liquid injection member 22 is provided with N-1 first mounting grooves 221 in the circumferential direction; the seal assembly 23 is correspondingly mounted in the first mounting groove 221. The sealing assembly 23 comprises a blocking piece 231 and a first spring 232, wherein the first spring 232 is positioned in the first mounting groove 221, and the blocking piece 231 can be sealed against the corresponding liquid inlet 330 under the elasticity of the first spring 232. When the injection tube 3 rotates, the injection tube 3 can press the inclined side wall of the blocking block 231 along the circumferential direction through the inclined side wall of the liquid inlet 330, and then can press the blocking block 231 to slide along the first mounting groove 221 to compress the first spring 232; after the injection tube 3 rotates by a desired angle, the liquid inlets 330 except for the uppermost liquid inlet 330 can correspond to the sealing assembly 23 again, and the blocking piece 231 can perform sealing fit against the corresponding liquid inlet 330 again under the elastic force of the first spring 232.
Another aspect of the present application provides a die casting machine, as shown in fig. 1, 2 and 16 to 22, wherein one preferred embodiment includes the dual injection system described above, and further includes a tail plate 2 fixedly mounted to the frame, and a movable die plate 5 slidably mounted to the frame. The movable template 5 comprises a push plate 51 and a pressing plate 52, and the push plate 51 and the pressing plate 52 are elastically connected through a third spring 53; the side of the tailboard 2 opposite to the movable die plate 5 is provided with a locking hole 81, and the side of the pressing plate 52 opposite to the tailboard 2 is provided with a locking assembly 7. When the mold is closed, the movable mold plate 5 can be driven by the mold closing mechanism to perform a mold closing process comprising a first action and a second action; wherein, the first action: the clamping mechanism can press the push plate 51 and push the pressing plate 52 to abut against the tail plate 2 through the third spring 53, and the locking assembly 7 is just inserted into the locking hole 81; a second action: the clamping mechanism continues to push the plate 51 and compresses the third spring 53 against the platen 52, and in this process, the push plate 51 drives the locking assembly 7 to perform locking with the locking hole 81.
It will be appreciated that the specific structure and operation of the clamping mechanism is well known to those skilled in the art and will not be described in detail herein. A common clamping mechanism is a double-toggle clamping mechanism, and can provide clamping force for the movable die plate 5 through the dead point position of the toggle connecting rod structure. In the present embodiment, the conventional movable mold plate 5 is divided into the push plate 51 and the pressing plate 52, and the push plate 51 and the pressing plate 52 are elastically connected by the third spring 53. So that when the die is in a die-closing state, the push plate 51 can provide a die-locking force to the pressing plate 52 through the dead center of the conventional double-toggle die-closing mechanism, so that the pressing plate 52 and the tail plate 2 are tightly adhered and are clamped and locked with the locking hole 81 through the locking assembly 7; at this time, the clamping force between the platen 52 and the tail plate 2 can be provided by the clamping force of the push plate 51 and the engagement lock of the lock assembly 7 and the lock hole 81. When the double-toggle clamping mechanism is slightly shortened in clamping stroke due to wear, that is, when a certain clearance exists between the push plate 51 and the platen 52, the clamping force between the platen 52 and the tail plate 2 can be provided by the elastic force of the third spring 53 and the engagement locking of the locking assembly 7 and the locking hole 81. Compared with the movable mould plate 5 with the traditional integral structure, the embodiment can effectively ensure the required mould clamping force of the mould after the mould clamping mechanism is worn, and further can ensure the normal production of the mould.
In this embodiment, as shown in fig. 1, 2 and 16, the frame includes four tie bars 1, the tail plate 2 is fixed at one end of the Yu Gelin column 1 through four corners, and the side of the tail plate 2, which is close to the movable mold plate 5, is fixedly provided with a fixed mold 620; the pushing plate 51 and the pressing plate 52 of the movable template 5 are both slidably arranged on the tie bar 1 through four corners, and the movable die 610 is fixedly arranged on one side of the pressing plate 52 close to the tail plate 2, so that when the die is closed, the pressing plate 52 can drive the movable die 610 to be in sealing fit with the fixed die 620 on the tail plate 2 to form a complete die; the number of the third springs 53 is four, and the third springs 53 are respectively sleeved on the four tie bars 1, so that the push plate 51 and the pressing plate 52 can be connected through the four third springs 53; to further improve the mold locking force, the diameter of the third spring 53 is appropriately increased, or the third spring 53 is a rectangular spring.
It will be appreciated that the specific structure of the frame is well known to those skilled in the art and will not be described in detail herein. Meanwhile, in order to improve the stability of the locking assembly 7 by the locking hole 81 when the platen 52 and the tail plate 2 are clamped, the number of the locking assembly 7 and the locking hole 81 may be plural, and generally, four locking assemblies 7 and locking holes 81 may be provided on the peripheral side portions of the platen 52 and the tail plate 2, respectively.
In the present embodiment, as shown in fig. 16 to 21, the locking hole 81 is tapered, and the opening of the locking hole 81 is provided with the insertion hole 82. The push plate 51 is provided with a first cam sleeve 511 at a side opposite to the pressing plate 52. The locking assembly 7 includes a mounting seat 71, a torsion spring 73 and a locking block 72. The mounting seat 71 is fixed on the pressing plate 52, the locking block 72 is in a V shape matched with the section of the locking hole 81, and the locking block 72 is rotationally connected with the mounting seat 71 through a rotating shaft 721 with one fixed end; the torsion spring 73 is sleeved on the rotating shaft 721, and two ends of the torsion spring 73 are respectively connected with the rotating shaft 721 and the mounting seat 71; the end of the shaft 721 remote from the lock block 72 may extend into a bore 520 provided in the platen 52 and secure a second cam sleeve 722. When the first action is performed, the locking block 72 may extend into the locking hole 81 along the insertion hole 82, where the first cam sleeve 511 is spaced from the second cam sleeve 722; when the second action is performed, the first cam sleeve 511 may press the second cam sleeve 722, so as to drive the locking block 72 to compress the torsion spring 73 and perform circumferential rotation around the locking hole 81 to be engaged with each other. When the clamping stroke of the clamping mechanism is shortened due to abrasion, that is, a certain clearance exists between the first cam sleeve 511 and the second cam sleeve 722, the locking block 72 can reversely rotate by a certain angle under the action of the torsion spring 73, but the locking block 72 and the locking hole 81 are still in an axial clamping locking state, so that the clamping state of pressing and fitting between the pressing plate 52 and the tail plate 2 is ensured.
In this embodiment, as shown in fig. 2 and 18, the locking seats 8 are detachably mounted on the peripheral side portions of the tail plate 2, and the locking holes 81 and the insertion holes 82 are formed in the corresponding locking seats 8.
It will be appreciated that, due to the large size of the tailboard 2, if the locking hole 81 is directly provided in the tailboard 2, the processing of the locking hole 81 will be difficult. Therefore, the locking hole 81 and the insertion hole 82 may be opened in the locking seat 8, and then the locking seat 8 may be mounted at the corresponding position of the tailgate 2 by a fastener such as a bolt.
It should be noted that the insertion hole 82 has a rectangular structure, the locking block 72 has a V-shaped plate structure, and the thickness of the locking block 72 is adapted to the width of the insertion hole 82, so that before the locking block 72 is matched with the locking hole 81, it is necessary to ensure that the locking block 72 is aligned with the insertion hole 82, so that the locking block 72 can be matched with the mounting seat 71 through a limiting structure.
Specifically, as shown in fig. 17 and 22, the inside of the mount 71 is provided with a stopper 710 in the circumferential direction, and the side wall of the spindle 721 to which the lock block 72 is rotatably mounted is provided with a stopper 723. The torsion spring 73 is always in a deformed state, so that during the first action, the stop 723 can always abut against one end of the blocking groove 710 under the elastic force of the torsion spring 73, so that the locking block 72 is opposite to the insertion hole 82. When the second process is performed, the rotation shaft 721 can drive the stop block 723 to slide along the stop groove 710 to the other end thereof; the central angle corresponding to the extension length of the blocking groove 710 is greater than or equal to the angle at which the locking block 72 is engaged and locked, so as to avoid interference of the blocking groove 710 on the rotation of the locking block 72.
For ease of understanding, the overmolding process may be described in more detail below.
(1) When the clamping mechanism is started and drives the movable platen 5 to move in the direction of the tail platen 2, as shown in fig. 19, at this time, a space is maintained between the push plate 51 and the platen 52 by the third spring 53, and a space is also maintained between the first cam housing 511 and the second cam housing 722.
(2) When the first action is performed, as shown in fig. 19 to 20, the pressing plate 52 gradually approaches the tail plate 2, so that the locking block 72 can extend into the insertion hole 82 until the locking block 72 just extends into the locking hole 81 when the movable die 610 on the pressing plate 52 abuts against the fixed die 620 on the tail plate 2. At this point, the first cam sleeve 511 is positioned within the bore 520 and remains spaced from the second cam sleeve 722.
(3) When the second operation is performed, as shown in fig. 20 to 21, the push plate 51 continues to move toward the tail plate 2, and at this time, the movable mold 610 on the platen 52 abuts against the fixed mold 620 on the tail plate 2, so that the platen 52 remains stationary, and the push plate 51 can further compress the movement of the third spring 53 until abutting against the platen 52. In this process, the first cam sleeve 511 approaches and presses the second cam sleeve 722, so that the locking block 72 rotates around the rotation shaft 721 in the locking hole 81 to compress the torsion spring 73, and the locking block 72 can be locked with the locking hole 81 in the axial direction.
(4) When the die is opened, the push plate 51 can be moved away from the tail plate 2, and the pressing plate 52 is kept stationary in the deformation stroke of the third spring 53. In this process, the first cam housing 511 is away from the second cam housing 722, and thus the lock block 72 is deflected toward an angle into the insertion hole 82 by the restoring force of the torsion spring 73. When the locking block 72 is parallel to the insertion hole 82 and the third spring 53 generates enough tension due to the movement of the push plate 51, the pressing plate 52 can slide along the tie bar 1 in a direction away from the tail plate 2 under the tension of the third spring 53, and the locking block 72 can just break away from the locking seat 8 along the insertion hole 82.
The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (10)
1. A dual shot system, comprising:
The injection pipes are bent, and the two injection pipes are respectively connected with two avoidance grooves which are arranged on the tail plate at intervals in a rotating way; and
the injection assembly is suitable for being in sealing sliding fit with the inner cavity of the corresponding injection tube;
when the injection work is carried out, the injection assembly is suitable for injecting molten metal injected into the injection pipe into a cavity of a die arranged on one side of the tail plate along the inner cavity;
when the die with different sizes is adapted, the injection assembly is suitable for driving the injection tube to rotate around the avoidance groove through the driving structure, so that the position of at least one injection tube for communicating the head of the die cavity is changed.
2. The dual shot system of claim 1, wherein: the injection tube comprises a head, a transition section, a liquid inlet section and an extension section which are sequentially communicated; the head is parallel to the liquid inlet section and the extension section, and the transition section is obliquely arranged relative to the head; the avoiding groove comprises a rotating section and an avoiding section; the injection tube is in running fit with the rotating section through the liquid inlet section; the transition section is positioned in the avoidance section, and the shape and the size of the avoidance section are matched with the rotation path of the transition section;
Initially, the injection assembly is located within the extension section so that molten metal can be injected into the liquid inlet section;
when the injection work is carried out, the injection assembly is suitable for extruding molten metal in the liquid inlet section into a cavity along the transition section and the head;
when the molds with different sizes are adapted, the injection assembly and the extension section are driven to rotate around the rotation section through the driving structure.
3. The dual shot system of claim 2, wherein: the injection assembly comprises an extrusion part and a push rod; the extrusion part can be bent, one end of the push rod is connected with the extrusion part, the other end of the push rod is connected with the injection cylinder, and the push rod is suitable for being matched with the injection tube through a driving structure;
when the injection work is carried out, the push rod is suitable for driving the extrusion part to hydraulically inject metal into the cavity through the bent inner cavity of the injection tube under the driving of the injection oil cylinder;
when the mold with different sizes is adapted, the push rod drives the injection tube to rotate through the driving structure under the driving of the injection oil cylinder.
4. A dual shot system as set forth in claim 3 wherein: the axial included angle between the transition section and the axial direction of the head or the liquid inlet section is alpha, and the value of the included angle alpha is 15-60 degrees;
the extrusion part comprises a plurality of extrusion blocks which are flexibly connected with each other, the extrusion blocks are spherical, and the extrusion blocks are in sealing sliding fit with the inner wall of the injection tube; the extrusion part is connected with the push rod through the extrusion block at the first end, and the extrusion part extrudes molten metal into the cavity along the transition section and the head through the extrusion block at the second end.
5. A dual shot system as set forth in claim 3 wherein: the driving structure comprises a driving assembly arranged on the side part of one end of the push rod, which is close to the extrusion part, and a driving groove arranged on the inner wall of the extension section; the push rod is suitable for being in sliding fit with the driving groove through the driving assembly; the driving groove comprises a non-deflection section and a deflection section, and the deflection section is close to one end of the extension section, which is far away from the liquid inlet section;
the push rod is suitable for sliding along the non-deflection section through the driving assembly when in injection operation;
The push rod is suitable for driving the injection tube to rotate unidirectionally by sliding the driving assembly along the deflection section when adapting to different dies.
6. The dual shot system of claim 5, wherein: the driving assembly comprises a driving block which is elastically matched with the pushing rod in a sliding manner along the radial direction of the pushing rod; the driving groove comprises a plurality of first groove sections and a plurality of second groove sections; the first groove sections extend along the axial direction of the extension section, and a plurality of the first groove sections are arranged on the inner wall of the extension section at equal intervals along the circumferential direction; the second groove section is positioned at one end of the extension section far away from the liquid inlet section, and adjacent first groove sections are communicated through the inclined second groove section to form the deflection section;
the positions where the adjacent two first groove sections are communicated with the corresponding second groove sections are respectively a point A and a point B; setting the depth of the point A to be equal to the depth of the corresponding end of the second groove section, wherein the depth of the point B is larger than the depth of the corresponding end of the second groove section, and the depth of the groove section extending to the position close to the point A in the first groove section is smaller than the depth of the point A;
when the injection work is carried out, the driving block is suitable for sliding along the position of the first groove section away from the second groove section;
When different molds are adapted, the driving block slides towards the deflection section in a first direction, and the driving block is suitable for sliding from the point A of one first groove section to the point B of the adjacent first groove section along the corresponding second groove section so as to drive the injection tube to rotate by a set angle; when the driving block slides from the point B of the first groove section to the second direction of the deflection section, the driving block is suitable for sliding from the point B to the point A along the single first groove section so as to keep the injection tube stationary.
7. The dual shot system of any one of claims 2-6, wherein: a pair of liquid injection parts which are in sliding fit with the injection tube are fixedly arranged on one side of the tail plate, which is away from the die; the side wall of the liquid injection part is provided with a liquid injection port with an upward opening; the liquid inlet section of the injection tube is provided with a plurality of liquid inlets along the circumferential direction; when the injection tube rotates at any set angle, the liquid inlet at the uppermost part of the liquid inlet section is always aligned with the liquid injection port, and the rest liquid inlet is in sealing fit with a plurality of sealing assemblies arranged on the inner side of the liquid injection part, so that the formed metal liquid is suitable for entering the liquid inlet section from the liquid injection port along the uppermost liquid inlet.
8. The dual shot system of claim 7, wherein: the liquid inlets are obliquely arranged along two sides of the circumferential direction; the sealing assembly comprises a blocking block which is elastically matched in a sliding manner along the radial direction of the inner wall of the liquid injection part, and the two sides of the blocking block along the circumferential direction are also obliquely arranged; the blocking piece is suitable for being in sealing fit with the corresponding liquid inlet in an elastic way under the action of elasticity, and at the moment, the front end of the blocking piece is flush with the side wall of the inner cavity of the liquid inlet section.
9. A die casting machine, characterized in that: a dual shot system comprising the dual shot system of any one of claims 1-8, further comprising a tail plate fixedly mounted to the frame, and a movable platen slidably mounted to the frame; the movable template comprises a push plate and a pressing plate, and the push plate is elastically connected with the pressing plate through a third spring; a locking hole is formed in one side, opposite to the movable template, of the tail plate, and a locking assembly is arranged in one side, opposite to the tail plate, of the pressing plate; the movable template is driven by the die clamping mechanism to be suitable for performing a die clamping process comprising a first action and a second action;
wherein, the first action: the pushing plate is suitable for pushing the pressing plate to prop against the tail plate through the third spring, and the locking assembly is inserted into the locking hole at the moment;
A second action: the pushing plate compresses the third spring to prop against the pressing plate, and then the pushing plate is suitable for driving the locking assembly to be locked with the locking hole in a clamping mode.
10. The die casting machine of claim 9, wherein: the locking hole is conical, and an opening of the locking hole is provided with a jack; a first cam sleeve is arranged on one side of the push plate opposite to the pressure plate; the locking assembly comprises a mounting seat, a torsion spring and a locking block; the mounting seat is fixed on the pressing plate, the locking block is in a V shape matched with the section of the locking hole, and the locking block is rotationally connected with the mounting seat through a rotating shaft with one fixed end; the torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected with the rotating shaft and the mounting seat; one end of the rotating shaft, which is far away from the locking block, is suitable for extending into a through hole arranged on the pressing plate and is fixed with a second cam sleeve;
when the first action is performed, the locking block is suitable for extending into the locking hole along the jack, and the first cam sleeve and the second cam sleeve are spaced at the moment;
when the second action is carried out, the first cam sleeve is suitable for extruding the second cam sleeve, so that the rotating shaft is driven to compress the torsion spring and rotate circumferentially around the locking hole until the locking block and the locking hole are mutually clamped.
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| CN202310829289.7A CN116532626B (en) | 2023-07-07 | 2023-07-07 | Double injection system and die casting machine |
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| CN118492307B (en) * | 2024-07-03 | 2025-02-18 | 广州市型腔模具制造有限公司 | Integrated double-injection die casting die |
| CN118723280B (en) * | 2024-08-02 | 2025-01-24 | 捷普电子(广州)有限公司 | Unlock buckle mechanism |
| CN119387540A (en) * | 2024-12-31 | 2025-02-07 | 宁波力劲科技有限公司 | Single-double shot die casting machine and head plate design method thereof |
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| CN116532626A (en) | 2023-08-04 |
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Application publication date: 20230804 Assignee: Ningbo Lijin Intelligent Casting Research Institute Co.,Ltd. Assignor: NINGBO L.K. TECHNOLOGY Co.,Ltd. Contract record no.: X2024330000661 Denomination of invention: A dual injection system and die-casting machine Granted publication date: 20230919 License type: Common License Record date: 20240929 |