A material injection device for die casting equipment

Abstract

The present invention discloses a material injection device for die-casting equipment, including a material injection mechanism and a longitudinal pushing mechanism connected to the material injection mechanism, wherein the longitudinal pushing mechanism includes a longitudinal pushing mounting seat, a longitudinal pushing servo motor arranged on the longitudinal pushing mounting seat, a driving gear connected to the output shaft of the longitudinal pushing servo motor, an eccentric wheel structure arranged transversely on the longitudinal pushing mounting seat and meshing with the driving gear, and a longitudinal pushing structure arranged longitudinally on the longitudinal pushing mounting seat and connected to the eccentric wheel structure; the material injection mechanism includes a furnace, a material injection mounting seat arranged on the furnace, a material injection nozzle inserted transversely into the material injection mounting seat, and a material injection pushing assembly arranged in the material injection mounting seat and connected to the longitudinal pushing structure. The material injection device for die-casting equipment provided by the present invention has high material injection stability and accuracy, and can ensure material injection filling saturation.

Description

Technical Field

[0001] The invention relates to the technical field of die casting, and in particular to a material injection device for die casting equipment. Background Art

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a metal mold with complex shapes. A die casting machine is a machine used for die casting. Under pressure, the die casting machine hydraulically injects molten metal into the mold to cool and form. After the mold is opened, a solid metal casting can be obtained.

[0003] Traditional die-casting machines have the following shortcomings:

[0004] (1) Hydraulic cylinders are used as the power source for injection. Due to the limitations of hydraulic cylinders, the speed and accuracy of their action stroke are relatively low, which affects the stability and accuracy of the injection operation.

[0005] (2) In the injection device, the push-down mechanism and the injection plunger of the injection mechanism are rigidly connected, which not only makes the mechanical structure easy to be damaged, but also makes it impossible to know when the mold cavity will be filled during injection, that is, it is impossible to know the time point when the mold cavity is filled; at the same time, it is also impossible to guarantee that the downward stroke can fill the mold cavity. As a result, the injection completion rate is reduced.

[0006] (3) In the material chamber of the shooting device, the piston that controls the feed is a simple piston structure with only an inclined surface. It moves up and down completely by air pressure without a guide structure. As a result, the piston is prone to left and right deviation and instability during the up and down movement. At the same time, the feed port is sealed only by the inclined surface, which has low stability. Summary of the invention

[0007] In view of the above-mentioned shortcomings, an object of the present invention is to provide a material injection device for die-casting equipment, which has high material injection stability and accuracy and can ensure saturated filling of the material.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0009] A material injection device for die-casting equipment, characterized in that it includes a material injection mechanism and a longitudinal pushing mechanism connected to the material injection mechanism, wherein the longitudinal pushing mechanism includes a longitudinal pushing mounting seat, a longitudinal pushing servo motor arranged on the longitudinal pushing mounting seat, a driving gear connected to the output shaft of the longitudinal pushing servo motor, an eccentric wheel structure transversely arranged on the longitudinal pushing mounting seat and meshing with the driving gear, and a longitudinal pushing structure longitudinally arranged on the longitudinal pushing mounting seat and connected to the eccentric wheel structure; the material injection mechanism includes a furnace, a material injection mounting seat arranged on the furnace, a material injection nozzle transversely inserted into the material injection mounting seat, and a material injection pushing assembly arranged in the material injection mounting seat and connected to the longitudinal pushing structure.

[0010] As a further improvement of the present invention, the eccentric wheel structure is mainly composed of a reinforcement shaft arranged on the longitudinal pushing mounting seat, and an eccentric wheel rotatably connected to the reinforcement shaft and meshed with the driving gear, wherein the rotating shaft of the eccentric wheel is connected to the longitudinal pushing structure.

[0011] As a further improvement of the present invention, the driving gear and the eccentric wheel are both bevel gears.

[0012] As a further improvement of the present invention, the longitudinal driving structure includes a longitudinal driving shaft, and the rotating shaft of the eccentric wheel is connected to the longitudinal driving shaft through a transverse translation structure. The transverse translation structure includes a connecting block arranged in the longitudinal driving shaft and sleeved on the outer periphery of the rotating shaft of the eccentric wheel, and an active cavity is formed in the longitudinal driving shaft for the connecting block to translate transversely.

[0013] As a further improvement of the present invention, the lateral translation structure also includes at least one translation slider arranged on the outside of the longitudinal driving shaft, the translation slider is connected to the linkage block and / or is sleeved on the outer periphery of the rotating shaft of the eccentric wheel, and at the same time, at least one sliding groove is formed on the outer side edge of the longitudinal driving shaft for the translation slider to translate laterally.

[0014] As a further improvement of the present invention, the longitudinal pushing structure also includes a buffer pushing shaft connected to the upper end of the shot pushing assembly, a cavity is formed in the longitudinal pushing shaft, the upper end of the buffer pushing shaft is movably inserted into the cavity, and the cavity and above the buffer pushing shaft are filled with nitrogen or inert gas.

[0015] As a further improvement of the present invention, the shooting pushing assembly includes a feeding rod arranged in the shooting mounting seat and extending to the lower end surface of the shooting mounting seat, a shooting plunger connected to the longitudinal pushing structure and inserted into the feeding rod, and a feeding piston movably arranged in the feeding rod and located below the shooting plunger, wherein a material chamber is formed in the feeding rod and passes through the upper end surface and the lower end surface of the feeding rod, and the shooting plunger and the feeding piston are both movably inserted in the material chamber; the material chamber is connected to the shooting nozzle.

[0016] As a further improvement of the present invention, the material chamber is mainly composed of an upper material chamber connected to a lower material chamber; the feeding piston is mainly composed of a blocking part movable in the upper material chamber, and a guide column connected to the lower end of the blocking part and movable in the lower material chamber, wherein an inner fitting slope is formed on the outer surface of the blocking part, and an outer fitting slope matching the inner fitting slope is formed on the inner wall of the upper material chamber close to the lower material chamber.

[0017] As a further improvement of the present invention, three planes extending along the length direction of the guide column are formed on the outer surface of the guide column, and an edge is formed between every two adjacent planes. The edge contacts the inner wall of the discharge chamber, and the cross-section of the guide column is triangular; the guide column divides the discharge chamber into three feed channels.

[0018] As a further improvement of the present invention, it also includes a shot locking mechanism, which includes a servo electric cylinder and a joint assembly connected between the servo electric cylinder and the shot mounting seat, wherein the joint assembly includes a connecting ear connected to the output shaft of the servo electric cylinder, a joint shaft arranged on the connecting ear, and a linkage plate rotatably connected to the joint shaft, and the linkage plate is connected to the shot mounting seat.

[0019] The beneficial effects of the present invention are:

[0020] (1) Through the special structural design of the longitudinal push mechanism, the longitudinal push servo motor drives the eccentric wheel structure to rotate. Due to the eccentric action of the eccentric wheel structure, the longitudinal push structure is driven to move up and down during the rotation of the eccentric wheel structure, that is, the longitudinal push structure can perform stable and accurate reciprocating actions of pushing down and pulling up. The longitudinal push servo motor is used as the power source for the injection, and its action stroke produces high speed and precision, which is conducive to improving the stability and precision of the injection action.

[0021] (2) Through the special structural design of the lateral translation structure, a lateral travel space is provided for the rotating shaft of the eccentric wheel, so that the rotating shaft of the eccentric wheel can be displaced laterally without applying a lateral force to the longitudinal driving shaft, but only applying a longitudinal force, so that the longitudinal driving shaft can always perform the reciprocating action of pushing down and pulling up stably and accurately, so as to facilitate the stable progress of the injection action.

[0022] (3) The flexible buffer push mechanism composed of a buffer push shaft and nitrogen or inert gas filled in the cavity can not only reduce mechanical damage and increase the injection pressure, but also play a buffering role, providing a balanced force for the entire action process. Specifically, since nitrogen or inert gas is used to play a buffering role, the downward stroke of the longitudinal push shaft can be increased in advance. After the downward stroke is increased, not only can the internal air pressure of the cavity be increased to increase the injection pressure, but also it can be ensured that the mold cavity can be filled. After the mold cavity is filled, due to the buffering effect of nitrogen or inert gas, the buffer push shaft can automatically move up and back, balancing the up and down movement force of the buffer push shaft, and there will be no jamming phenomenon. In this way, it can be ensured that the mold cavity is indeed filled and saturated, and there will be no problem of insufficient volume due to action accuracy errors or stroke errors.

[0023] (4) The feeding piston in the material chamber is composed of a blocking part and a guide column with a special structural design. Compared with the traditional simple piston structure with only an inclined surface, the stability is significantly improved. Specifically, the cross-section of the guide column is triangular. The principle of maintaining the center stability by three points in a circle and the guiding role played by the guide column can make the feeding piston move up and down smoothly in the loading chamber and the unloading chamber, reducing the offset. It can be seen that the guide column plays a guiding role in the up and down movement of the feeding piston, improves the stability of the up and down movement of the feeding piston, and is conducive to a smoother and more stable fit between the inner fitting inclined surface of the blocking part and the outer fitting inclined surface of the loading chamber.

[0024] The above is an overview of the technical solution of the invention. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the material injection device in the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the combination of the injection mechanism and the longitudinal pushing mechanism in the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the eccentric wheel structure combined with the driving gear in the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the eccentric wheel combined with the longitudinal driving shaft in the present invention;

[0029] Figure 5 It is a schematic diagram of the structure in which the rotating shafts of the linkage block and the eccentric wheel are arranged in the longitudinal driving shaft in the present invention;

[0030] Figure 6 is a cross-sectional view of the longitudinal pushing mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the combination of the injection nozzle and the feeding rod in the present invention;

[0032] Figure 8 It is a cross-sectional view of the combination of the injection plunger, the feeding piston and the feeding rod in the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the feeding piston in the present invention;

[0034] Fig.10 A bottom view of the feeding piston in the present invention disposed in the feeding rod;

[0035] Fig.11 It is a structural schematic diagram of the shot locking mechanism of the present invention being arranged on a longitudinal mounting plate;

[0036] Fig.12It is a schematic structural diagram of the injection device of the present invention applied to a die-casting device. DETAILED DESCRIPTION

[0037] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0038] Please refer to Figure 1 and Figure 2 The embodiment of the present invention provides a material injection device 4 for a die-casting device, comprising a material injection mechanism 41 disposed on the back of a longitudinal mounting plate 1, and a longitudinal pushing mechanism 42 connected to the material injection mechanism 41, wherein Figure 2 As shown, the longitudinal pushing mechanism 42 includes a longitudinal pushing mounting seat 421, a longitudinal pushing servo motor 422 disposed on the longitudinal pushing mounting seat 421, a driving gear 423 connected to the output shaft of the longitudinal pushing servo motor 422, an eccentric wheel structure 424 disposed transversely on the longitudinal pushing mounting seat 421 and meshed with the driving gear 423, and a longitudinal pushing structure 425 disposed longitudinally on the longitudinal pushing mounting seat 421 and connected to the eccentric wheel structure 424. Specifically, the injection mechanism 41 includes a furnace 411, an injection mounting seat 412 disposed on the furnace 411, an injection nozzle 40 transversely inserted into the injection mounting seat 412, and an injection pushing assembly 413 disposed in the injection mounting seat 412 and connected to the longitudinal pushing structure 425.

[0039] The driving gear 423 is driven to rotate by the longitudinal driving servo motor 422, which drives the eccentric wheel structure 424 meshing with the driving gear 423 to rotate. Due to the eccentric action of the eccentric wheel structure 424, the longitudinal driving structure 425 is driven to move up and down during the rotation of the eccentric wheel structure 424, that is, the longitudinal driving structure 425 performs a reciprocating action of pushing down and pulling up, thereby driving the shooting pushing component 413 of the shooting mechanism 41 to push down and pull up reciprocatingly, and the raw materials in the melting furnace 411 are shot through the shooting nozzle 40 into the mold 2 on the front side of the longitudinal mounting plate 1, as shown in FIG. Fig.12 Specifically, the raw materials in the melting furnace 411 can be metals such as zinc, aluminum or magnesium.

[0040] In this embodiment, specifically, Figures 2 to 4As shown, the eccentric wheel structure 424 is mainly composed of a reinforcement shaft 4241 arranged on the longitudinal push mounting seat 421, and an eccentric wheel 4242 rotatably connected to the reinforcement shaft 4241 and meshed with the driving gear 423, wherein the rotating shaft 42420 of the eccentric wheel 4242 is connected to the longitudinal push structure 425. Since the rotating shaft 42420 of the eccentric wheel 4242 is offset from the center position of the eccentric wheel 4242, when the eccentric wheel 4242 rotates around the rotating shaft 42420, due to the unique structure of the eccentric wheel 4242, the longitudinal push structure 425 will inevitably be driven to move up and down. Specifically, the driving gear 423 and the eccentric wheel 4242 are both bevel gears.

[0041] Due to the reinforcing effect of the reinforcing shaft 4241, during the rotation of the eccentric wheel 4242, no longitudinal or lateral displacement will occur relative to the longitudinal pushing mounting seat 421, so that the eccentric wheel 4242 can rotate stably under the drive of the driving gear 423, thereby stably driving the longitudinal pushing structure 425 to perform a reciprocating action of pushing down and pulling up.

[0042] When the eccentric wheel 4242 rotates, that is, the shaft 42420 of the eccentric wheel 4242 rotates, the shaft 42420 is displaced both longitudinally and transversely. Therefore, in order to ensure that the shaft 42420 of the eccentric wheel 4242 only drives the longitudinal driving structure 425 to produce longitudinal displacement without producing transverse displacement, the longitudinal driving structure 425 is optimized in this embodiment. Specifically, Figure 5 As shown, the longitudinal driving structure 425 includes a longitudinal driving shaft 4251, and the rotating shaft 42420 of the eccentric wheel 4242 is connected to the longitudinal driving shaft 4251 through a transverse translation structure 4252. The transverse translation structure 4252 includes a connecting block 42521 which is arranged in the longitudinal driving shaft 4251 and sleeved on the periphery of the rotating shaft 42420 of the eccentric wheel 4242, and an active cavity 42510 is formed in the longitudinal driving shaft 4251 for the connecting block 42521 to translate transversely. Due to the combined design of the linking block 42521 and the active cavity 42510 in the longitudinal driving shaft 4251, when the rotating shaft 42420 of the eccentric wheel 4242 rotates, the longitudinal displacement will directly trigger the longitudinal movement of the longitudinal driving shaft 4251, that is, to perform the reciprocating action of pushing down and pulling up; and the lateral displacement will directly trigger the linking block 42521 to translate laterally in the active cavity 42510, without applying lateral force to the longitudinal driving shaft 4251, that is, the longitudinal driving shaft 4251 will not move laterally, so that the longitudinal driving shaft 4251 can always stably perform the reciprocating action of pushing down and pulling up.

[0043] In order to improve the stability of the lateral translation of the rotating shaft 42420 of the eccentric wheel 4242, as Figure 4 and Figure 5 As shown, the lateral translation structure 4252 of this embodiment further includes at least one lateral translation slider 42522 disposed outside the longitudinal driving shaft 4251, the lateral translation slider 42522 is connected to the linkage block 42521 and / or sleeved on the outer periphery of the rotating shaft 42420 of the eccentric wheel 4242, and at least one chute 42511 for lateral translation of the lateral translation slider 42522 is formed on the outer side of the longitudinal driving shaft 4251. When the rotating shaft 42420 of the eccentric wheel 4242 drives the linkage block 42521 to lateral translate in the active cavity 42510, the lateral translation slider 42522 is synchronously driven to move in the chute 42511, and the lateral translation slider 42522 is combined with the chute 42511 to play a translation guide role, thereby improving the stability of the lateral translation of the rotating shaft 42420 of the eccentric wheel 4242, without driving the longitudinal driving shaft 4251 to perform lateral translation.

[0044] Therefore, the design of the lateral translation structure 4252 provides lateral travel space for the rotating shaft 42420 of the eccentric wheel 4242, so that the rotating shaft 42420 of the eccentric wheel 4242 can be displaced laterally without applying lateral force to the longitudinal driving shaft 4251, but only applying longitudinal force, so that the longitudinal driving shaft 4251 can always perform reciprocating actions of pushing down and pulling up.

[0045] When the longitudinal pushing mechanism 42 drives the ejection mechanism 41 to eject materials, in order to increase the ejection pressure and reduce the damage to the mechanical structure, Figure 6As shown, the longitudinal pushing structure 425 of this embodiment further includes a buffer pushing shaft 4253 connected to the upper end of the shot pushing assembly 413, a cavity 42512 is formed in the longitudinal pushing shaft 4251, the upper end of the buffer pushing shaft 4253 is movably inserted into the cavity 42512, and the cavity 42512 is sealed by the buffer pushing shaft 4253, and nitrogen or an inert gas is filled in the cavity 42512 and above the buffer pushing shaft 4253. When the longitudinal pushing shaft 4251 moves downward (pushes downward), since the buffer pushing shaft 4253 is movably connected to the longitudinal pushing shaft 4251, the longitudinal pushing shaft 4251 does not apply a downward force to the buffer pushing shaft 4253, and the buffer pushing shaft 4253 does not move downward. Therefore, the downward movement of the longitudinal driving shaft 4251 will inevitably reduce the internal space of the cavity 42512, and the nitrogen or inert gas inside the cavity 42512 will be compressed, so that the internal air pressure of the cavity 42512 will increase instantly, and act on the buffer driving shaft 4253, so that the buffer driving shaft 4253 moves downward, and pushes the shot pushing assembly 413 downward, so that the shot nozzle 40 obtains a greater shot pressure. When the longitudinal driving shaft 4251 moves upward, the internal space of the cavity 42512 will inevitably increase, and the internal air pressure of the cavity 42512 will decrease instantly, so that the buffer driving shaft 4253 moves upward in the opposite direction, and pulls the shot pushing assembly 413 upward. Repeating the above actions continuously can drive the shot pushing assembly 413 to move up and down, and complete the shot operation.

[0046] This embodiment adopts a flexible buffer push mechanism composed of a buffer push shaft 4253 and nitrogen or inert gas filled in the cavity 42512, which can not only increase the injection pressure, but also play a buffering role, providing a balanced force for the entire action process.

[0047] Specifically, since nitrogen or inert gas is used to play a buffering role, the downward stroke of the longitudinal push shaft 4251 can be increased in advance. After the downward stroke is increased, not only can the internal air pressure of the cavity 42512 be increased to increase the injection pressure, but also the mold cavity can be filled. After the mold cavity is filled, due to the buffering effect of nitrogen or inert gas, the buffer push shaft 4253 can automatically move up and back, balancing the up and down movement force of the buffer push shaft 4253, and there will be no jamming. In this way, it can be ensured that the mold cavity is indeed filled and saturated, and there will be no problem of insufficient volume due to movement accuracy errors or stroke errors.

[0048] In this embodiment, if Figure 7 and Figure 8As shown, the shooting pushing assembly 413 includes a feeding rod 4131 arranged in the shooting mounting seat 412 and extending to the lower end surface of the shooting mounting seat 412, a shooting plunger 4132 connected to the longitudinal pushing structure 425 and inserted into the feeding rod 4131, and a feeding piston 4133 movably arranged in the feeding rod 4131 and located below the shooting plunger 4132, wherein a material chamber 41310 is formed in the feeding rod 4131 and passes through the upper end surface and the lower end surface of the feeding rod 4131, and the shooting plunger 4132 and the feeding piston 4133 are both movably inserted in the material chamber 41310; the material chamber 41310 is connected with the shooting nozzle 40, specifically, a channel 4120 is opened in the shooting mounting seat 412 to connect the material chamber 41310 with the shooting nozzle 40, as shown in FIG. Figure 7 shown.

[0049] Specifically, the material chamber 41310 is mainly composed of a loading chamber 413101 connected to a lower loading chamber 413102; the feeding piston 4133 is mainly composed of a blocking portion 41331 movable in the loading chamber 413101, and a guide column 41332 connected to the lower end of the blocking portion 41331 and movable in the lower loading chamber 413102, wherein an inner fitting slope 413311 is formed on the outer surface of the blocking portion 41331, and an outer fitting slope 4131011 matching the inner fitting slope 413311 is formed on the inner wall of the loading chamber 413101 close to the lower loading chamber 413102.

[0050] like Fig. 9 and Fig.10 As shown, three planes 413321 extending along the length direction of the guide column 41332 are formed on the outer surface of the guide column 41332, and an edge 413322 is formed between every two adjacent planes 413321. The edge 413322 is in contact with the inner wall of the discharge chamber 413102, and the cross-section of the guide column 41332 is triangular; the guide column 41332 divides the discharge chamber 413102 into three feed channels 413321.

[0051] When the shot plunger 4132 is pushed downward by the longitudinal pushing structure 425, the air pressure in the loading chamber 413101 and between the shot plunger 4132 and the feeding piston 4133 increases, so that the feeding piston 4133 is pushed downward by the internal air pressure, so that the feeding piston 4133 moves downward until the inner fitting slope 413311 of the blocking portion 41331 and the outer fitting slope 4131011 of the loading chamber 413101 are sealed, that is, the blocking portion 41331 blocks the feed port between the loading chamber 413101 and the lowering chamber 413102, so that the raw materials in the furnace 411 will not enter from the lowering chamber 413102. At the same time, the downward movement of the shot plunger 4132 causes the material in the loading chamber 413101 to pass through the channel 4120 and be ejected by the shot nozzle 40, completing the operation of injecting material into the mold 2. When the injection plunger 4132 is driven upward by the longitudinal pushing structure 425, the vacuum pressure inside the loading chamber 413101 causes the feeding piston 4133 to move upward, and the feeding port between the loading chamber 413101 and the unloading chamber 413102 changes from a blocked state to an open state; the vacuum pressure inside the loading chamber 413101 causes the material in the furnace 411 to be sucked into the loading chamber 413101 through the three feeding channels 413321, thus completing the feeding process. Repeating the above actions can complete the feeding and injection operations.

[0052] The feeding piston 4133 of this embodiment is composed of a blocking portion 41331 and a guide column 41332 with a special structural design. Compared with the traditional simple piston structure containing only an inclined surface, the stability is significantly improved. Specifically, the cross-section of the guide column 41332 is triangular. The principle of maintaining the center stability by three points in a circle and the guiding role played by the guide column 41332 can make the feeding piston 4133 move up and down smoothly in the loading chamber 413101 and the unloading chamber 413102, reducing the offset. It can be seen that the guide column 41332 plays a guiding role in the up and down movement of the feeding piston 41333, improves the stability of the up and down movement of the feeding piston 41333, and is conducive to the smoother and more stable fit of the inner fitting inclined surface 413311 of the blocking portion 41331 and the outer fitting inclined surface 4131011 of the loading chamber 413101.

[0053] In order to enable the injection nozzle 40 to complete the injection action more stably, this embodiment further includes a injection locking mechanism 6, such as Fig.11As shown, the shot locking mechanism 6 includes a servo electric cylinder 61, and a joint assembly 62 connected between the servo electric cylinder 61 and the shot mounting seat 412, wherein the joint assembly 62 includes a connecting ear 621 connected to the output shaft of the servo electric cylinder 61, a joint shaft 622 arranged on the connecting ear 621, and a linkage plate 623 rotatably connected to the joint shaft 622, and the linkage plate 623 is connected to the shot mounting seat 412. When the shot nozzle 40 extends into the mold 2 to shoot, the servo electric cylinder 61 drives the linkage plate 623 of the joint assembly 62, and the linkage plate 623 applies a force toward the mold 2 to the shot mounting seat 412, thereby locking the shot mounting seat 412 at the moment of shooting, so that the shot nozzle 40 can complete the shooting action more stably. After the shooting action is completed, the shot locking mechanism 6 releases the locking action on the shot mounting seat 412. Thus, the locking and shooting actions are completed one by one.

[0054] The servo electric cylinder 61 drives the joint assembly 62 to lock the shot mounting seat 412 during the shot. The servo electric cylinder 61 has the advantages of precise speed, position and thrust control of the servo motor; moreover, it converts the rotary motion of the servo motor into linear motion, that is, converts the rotary force into linear force, which has higher stability.

[0055] In this embodiment, the longitudinal push servo motor 422 and the servo electric cylinder 61 can be controlled by a PLC controller, and the specific action stroke can be precisely controlled by programming, so that each action can be precisely controlled with high precision. At the same time, compared with the problem that the power source of the ordinary hydraulic motor must be turned on all the time to have electricity, there is a problem of high power consumption, the motor of the longitudinal push servo motor 422 only has electricity when it is started, and the power consumption is low, which saves electricity and reduces costs; at the same time, there will be no problems such as oil leakage and loud noise of ordinary hydraulic motors.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as the above-mentioned embodiments of the present invention are within the protection scope of the present invention.

Claims

1. A material injection device for die casting equipment, characterized in that: The invention comprises a material-shooting mechanism and a longitudinal pushing mechanism connected to the material-shooting mechanism, wherein the longitudinal pushing mechanism comprises a longitudinal pushing mounting seat, a longitudinal pushing servo motor arranged on the longitudinal pushing mounting seat, a driving gear connected to the output shaft of the longitudinal pushing servo motor, an eccentric wheel structure arranged transversely on the longitudinal pushing mounting seat and meshing with the driving gear, and a longitudinal pushing structure arranged longitudinally on the longitudinal pushing mounting seat and connected to the eccentric wheel structure; the material-shooting mechanism comprises a furnace, a material-shooting mounting seat arranged on the furnace, a material-shooting nozzle inserted transversely into the material-shooting mounting seat, and a material-shooting pushing assembly arranged in the material-shooting mounting seat and connected to the longitudinal pushing structure; The eccentric wheel structure is mainly composed of a reinforcement shaft arranged on the longitudinal push mounting seat, and an eccentric wheel rotatably connected to the reinforcement shaft and meshed with the driving gear, wherein the rotating shaft of the eccentric wheel is connected to the longitudinal push structure; The driving gear and the eccentric wheel are both bevel gears; The longitudinal driving structure includes a longitudinal driving shaft, the rotating shaft of the eccentric wheel is connected to the longitudinal driving shaft through a transverse translation structure, the transverse translation structure includes a linkage block arranged in the longitudinal driving shaft and sleeved on the outer periphery of the rotating shaft of the eccentric wheel, and a movable cavity for the linkage block to translate transversely is formed in the longitudinal driving shaft; The lateral translation structure also includes at least one translation slider arranged on the outside of the longitudinal driving shaft, which is connected to the linkage block and / or sleeved on the outer periphery of the rotating shaft of the eccentric wheel. At the same time, at least one slide groove is formed on the outer side of the longitudinal driving shaft for the translation slider to translate horizontally.

2. The injection device for die casting equipment according to claim 1, characterized in that: The longitudinal pushing structure also includes a buffer pushing shaft connected to the upper end of the shot pushing assembly. A cavity is formed in the longitudinal pushing shaft. The upper end of the buffer pushing shaft is movably inserted into the cavity. Nitrogen or inert gas is filled in the cavity and above the buffer pushing shaft.

3. The injection device for die casting equipment according to any one of claims 1 to 2, characterized in that: The shooting pushing assembly includes a feeding rod arranged in the shooting mounting seat and extending to the lower end surface of the shooting mounting seat, a shooting plunger connected to the longitudinal pushing structure and inserted into the feeding rod, and a feeding piston movably arranged in the feeding rod and located below the shooting plunger, wherein a material chamber is formed in the feeding rod and passes through the upper end surface and the lower end surface of the feeding rod, and the shooting plunger and the feeding piston are both movably inserted in the material chamber; the material chamber is connected to the shooting nozzle.

4. The injection device for die casting equipment according to claim 3, characterized in that: The material chamber is mainly composed of an upper material chamber connected to a lower material chamber; the feeding piston is mainly composed of a blocking part movable in the upper material chamber, and a guide column connected to the lower end of the blocking part and movable in the lower material chamber, wherein an inner fitting slope is formed on the outer surface of the blocking part, and an outer fitting slope matching the inner fitting slope is formed on the inner wall of the upper material chamber close to the lower material chamber.

5. The injection device for die casting equipment according to claim 4, characterized in that: Three planes extending along the length direction of the guide pillar are formed on the outer side surface of the guide pillar, and an edge is formed between every two adjacent planes. The edge contacts the inner wall of the material discharge chamber, and the cross section of the guide pillar is triangular; the guide pillar divides the material discharge chamber into three feeding channels.

6. The injection device for die casting equipment according to any one of claims 1 to 2, characterized in that: It also includes a shot locking mechanism, which includes a servo electric cylinder and a joint assembly connected between the servo electric cylinder and the shot mounting seat, wherein the joint assembly includes a connecting ear connected to the output shaft of the servo electric cylinder, a joint shaft arranged on the connecting ear, and a linkage plate rotatably connected to the joint shaft, and the linkage plate is connected to the shot mounting seat.

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