Injection molding equipment for metal product processing

Abstract

The injection molding equipment for metal product machining comprises a first rack and a second rack, a metal raw material melting mechanism and an injection mechanism are arranged on the first rack, a mold die-casting assembly is arranged on the second rack, and the injection mechanism comprises a second linear motor, a second hydraulic cylinder and an injection barrel; an injection punch is slidably arranged in the injection cylinder and connected with a piston rod of a second hydraulic cylinder, the piston rod of the second hydraulic cylinder is of a penetrating type, the right end of the piston rod is connected with a second linear motor, the second linear motor comprises a linear moving module, a fixing seat is fixedly installed on the side face of the linear moving module, and the fixing seat is fixedly connected with the end of the piston rod. Stepless regulation of the injection pressure is achieved, the precision of the injection pressure is improved, the response speed of injection is increased, and the problem that in the prior art, the injection pressure is controlled extensively is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal die-casting equipment, and specifically relates to an injection molding equipment for metal product processing. Background Art

[0002] The injection molding equipment for metal products includes a fixed mold assembly and a movable mold assembly. The fixed mold is fixed on the fixed mold assembly, and the movable mold is fixed on the movable mold assembly. After applying pressure to the movable mold assembly to make the fixed mold and the movable mold close together, molten metal or alloy liquid can be injected into the cavity formed by the fixed mold and the movable mold. After the metal liquid or alloy liquid cools, a die-cast product can be formed.

[0003] The existing injection molding equipment for metal products has problems such as single-stage hydraulic drive during injection, large pressure fluctuations, and local overheating leading to metal oxidation.

[0004] Therefore, we propose an injection molding equipment for metal product processing to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of the present invention is to provide an injection molding equipment for metal product processing to solve the problems mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An injection molding equipment for metal product processing, comprising: a first frame and a second frame. A metal raw material melting mechanism and an injection mechanism are arranged on the first frame, and a mold die-casting assembly is arranged on the second frame;

[0007] The injection mechanism includes a second linear motor, a second hydraulic cylinder, and an injection cylinder. An injection punch is slidably arranged in the injection cylinder, and the injection punch is connected to the piston rod of the second hydraulic cylinder;

[0008] The piston rod of the second hydraulic cylinder is a through type. The right end of the piston rod is connected to the second linear motor. The second linear motor includes a linear movement module. A fixed seat is fixedly installed on the side of the linear movement module, and the fixed seat is fixedly connected to the end of the piston rod.

[0009] Preferably, the first frame is divided into upper and lower layers. The upper layer is provided with a metal raw material melting mechanism, which includes a melting cylinder. The right part of the melting cylinder is connected to a feeding cylinder, and the injection mechanism is arranged on the lower layer of the first frame.

[0010] Preferably, a spiral blade conveying rod is arranged in the melting cylinder. The right end of the melting cylinder is connected to a gearbox, and the gearbox is connected to a motor. The spiral blade conveying rod is coaxially and fixedly connected to the output shaft of the gearbox.

[0011] Preferably, the melting cylinder comprises an inner layer of the cylinder barrel. A cooling layer is arranged outside the inner layer of the cylinder barrel. A liquid nitrogen cooling channel is opened in the cooling layer. The liquid nitrogen cooling channel is connected to a liquid nitrogen delivery device. A heating layer is wrapped outside the cooling layer. High-frequency heating coils are equidistantly arranged in the heating layer. The high-frequency heating coils are independently controlled respectively. An outer protective layer is wrapped outside the heating layer. A downward elbow part is arranged at the left end of the melting cylinder. The lower end of the elbow part is fixedly connected to a diversion cylinder through a flange. The lower end of the diversion cylinder is connected to an injection cylinder through a stop valve.

[0012] Preferably, a temperature sensor is inserted into the wall of the injection cylinder.

[0013] Preferably, three sets of seals are provided on the injection punch, namely a graphite braided packing, a metal bellows compensator, and a spring-preloaded silicon carbide seal ring.

[0014] Preferably, the second frame comprises a fixed base. Slide rails are symmetrically arranged on the upper surface of the fixed base. The slide rails are slidably connected to a sliding platform. A first linear motor is also arranged on the upper surface of the fixed base. The moving part of the first linear motor is fixedly connected to the sliding platform. A die casting assembly is installed on the sliding platform.

[0015] Preferably, the die casting assembly comprises a first hydraulic cylinder, a moving die module, and a fixed die module. The moving die module comprises a moving die fixing plate and a moving die moving plate. The moving die body is detachably installed on the side of the moving die moving plate. A moving die ejecting assembly is installed on the moving die fixing plate. The moving die ejecting assembly movably penetrates through the moving die moving plate and the moving die body.

[0016] Preferably, the fixed die module comprises a fixed die fixing plate. A fixed die support layer plate is fixedly installed on the side of the fixed die fixing plate. The fixed die body is detachably installed on the side of the fixed die support layer plate. A guide rod is installed between the moving die module and the fixed die module. The two ends of the guide rod are respectively fixedly connected to the moving die fixing plate, the fixed die fixing plate, and the fixed die support layer plate. The moving die moving plate is slidably connected to the guide rod, and the moving die moving plate is fixedly connected to the telescopic end of the first hydraulic cylinder.

[0017] Preferably, a fixed die ejecting assembly is installed on the fixed die module. The fixed die ejecting assembly comprises a linear slide bar. The linear slide bar slidably penetrates through the moving die moving plate, the fixed die support layer plate, and the fixed die fixing plate. A top block is fixedly installed at the left end of the linear slide bar. A clamp is fixedly installed at the right end of the linear slide bar. An L-shaped ejecting rod is clamped in the clamp. The other end of the L-shaped ejecting rod slidably penetrates through the fixed die body, the fixed die support layer plate, and the fixed die fixing plate. A spring is sleeved on the right part of the linear slide bar. The two ends of the spring respectively abut against the fixed die support layer plate and the clamp.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Under normal circumstances, the piston rod is driven by the second linear motor to advance, and then the liquid metal in the syringe is injected into the die-casting assembly of the mold. When a large injection thrust is required, the second hydraulic cylinder is started, and the piston rod is applied with a force by the superposition of hydraulic pressure and electromagnetic thrust of the second linear motor, realizing stepless adjustment of the injection pressure, improving the accuracy of the injection pressure, and enhancing the injection response speed, solving the problem of rough injection pressure control in the prior art;

[0020] 2. Liquid nitrogen cooling channels are provided in the cooling layer, and high-frequency heating coils are arranged equidistantly in the heating layer. The high-frequency heating coils are independently controlled respectively, realizing high-precision temperature control of induction heating and liquid nitrogen cooling, and solving the problem of metal oxidation caused by local overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic structural diagram of the related structure of the melting cylinder and the syringe in the present invention;

[0023] Figure 3 is a schematic structural diagram of the die-casting assembly of the mold in the present invention;

[0024] Figure 4 is a cross-sectional view of the melting cylinder in the present invention;

[0025] Figure 5 For the present invention Figure 4 is an enlarged view of part A;

[0026] Figure 6 is a cross-sectional view of the syringe in the present invention;

[0027] Figure 7 is a schematic structural diagram of the second linear motor and the second hydraulic cylinder in the present invention;

[0028] Figure 8 is a side view of the moving module and the fixed module in the present invention;

[0029] Figure 9 is a top view of the moving module and the fixed module in the present invention.

[0030] In the figure: 1. First frame; 2. Second frame; 21. Fixed base; 22. Slide rail; 23. First linear motor; 24. Sliding platform; 3. Die casting assembly; 31. First hydraulic cylinder; 32. Moving die module; 321. Moving die fixing plate; 322. Moving die moving plate; 323. Moving die body; 33. Fixed die module; 331. Fixed die fixing plate; 332. Fixed die support layer plate; 333. Fixed die body; 34. Moving die ejecting assembly; 35. Fixed die ejecting assembly; 351. Linear slide bar; 352. Ejecting block; 353. Spring; 354. Clamp; 355. L-shaped ejecting rod; 36. Guide rod; 4. Gearbox; 41. Motor; 5. Melting cylinder; 51. External protective layer; 52. Heating layer; 53. High-frequency heating coil; 54. Cooling layer; 55. Liquid nitrogen cooling channel; 56. Inner layer of barrel; 6. Feeding barrel; 7. Diversion barrel; 71. Cut-off valve; 8. Second linear motor; 81. Linear moving module; 82. Fixed seat; 9. Second hydraulic cylinder; 91. Piston rod; 10. Injection barrel; 101. Temperature sensor; 102. Injection punch. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figure 1-9 , the present invention provides a technical solution: an injection molding device for processing metal products, including: a first frame 1 and a second frame 2. A metal raw material melting mechanism and an injection mechanism are provided on the first frame 1, and a die casting assembly 3 is provided on the second frame 2. The metal raw material is melted at high temperature by the melting mechanism and introduced into the injection mechanism, and the injection mechanism injects the liquid metal into the die casting assembly 3 to form a whole.

[0033] Specifically, the first frame 1 is divided into upper and lower layers. The upper layer is provided with a metal raw material melting mechanism, which includes a melting cylinder 5. The right part of the melting cylinder 5 is connected to a feeding cylinder 6, and the feeding cylinder 6 introduces the metal raw material and its ingredients into the melting cylinder 5;

[0034] A spiral blade conveying rod is arranged in the melting cylinder 5. The right end of the melting cylinder 5 is connected to a gearbox 4, and the gearbox 4 is connected to a motor 41. The spiral blade conveying rod is coaxially and fixedly connected to the output shaft of the gearbox 4, realizing the automatic rotation of the spiral blade conveying rod, and pushing the material fed by the feeding cylinder 6 along the melting cylinder 5 to the left end;

[0035] The melting cylinder 5 includes an inner cylinder layer 56. A cooling layer 54 is arranged outside the inner cylinder layer 56. A liquid nitrogen cooling channel 55 is provided in the cooling layer 54. The liquid nitrogen cooling channel 55 is connected to a liquid nitrogen delivery device for delivering liquid nitrogen into the cooling layer 54 to cool and regulate the liquid metal in the inner cylinder layer 56.

[0036] The outside of the cooling layer 54 is wrapped with a heating layer 52. High-frequency heating coils 53 are equidistantly arranged in the heating layer 52. The high-frequency heating coils 53 heat and melt the metal raw materials in the melting cylinder 5 into liquid metal. The outside of the heating layer 52 is wrapped with an outer protective layer 51.

[0037] The high-frequency heating coils 53 are independently controlled respectively to heat different positions in the melting cylinder 5.

[0038] The left end of the melting cylinder 5 is provided with a downward elbow part. The lower end of the elbow part is fixedly connected to a diversion cylinder 7 through a flange. The lower end of the diversion cylinder 7 is connected to an injection cylinder 10 through a stop valve 71. The liquid metal automatically flows into the injection cylinder 10 under the control of the stop valve 71.

[0039] The injection mechanism is arranged on the lower layer of the first frame 1. The injection mechanism includes a second linear motor 8, a second hydraulic cylinder 9 and an injection cylinder 10. A temperature sensor 101 is inserted into the wall of the injection cylinder 10 to feedback the temperature of the liquid metal in the injection cylinder 10. The temperature at this place is read through the control system, and then the temperature of the liquid metal is adjusted through the high-frequency heating coils 53 and the liquid nitrogen cooling channel 55 to realize the intelligent temperature control of the liquid metal.

[0040] An injection punch 102 is slidably arranged in the injection cylinder 10. The injection punch 102 is connected to the piston rod 91 of the second hydraulic cylinder 9. The piston rod 91 is an aluminum alloy core body with a tungsten carbide coating and can withstand high temperatures.

[0041] Three groups of seals are provided on the injection punch 102, namely a graphite braided packing, a metal bellows compensator and a spring-preloaded silicon carbide seal ring, to increase the sealing performance between the injection punch 102 and the inner wall of the injection cylinder 10 and ensure the stable propulsion of the liquid metal.

[0042] The piston rod 91 of the second hydraulic cylinder 9 is a through type. The right end of the piston rod 91 is connected to the second linear motor 8. The second linear motor 8 includes a linear movement module 81. A fixed seat 82 is fixedly installed on the side of the linear movement module 81. The fixed seat 82 is fixedly connected to the end of the piston rod 91.

[0043] Under normal circumstances, the piston rod 91 is driven by the second linear motor 8 to advance, and then the liquid metal in the syringe 10 is injected into the die-casting assembly 3 of the mold. When a large thrust injection is required, the second hydraulic cylinder 9 is started, and the hydraulic pressure and the electromagnetic thrust of the second linear motor 8 are superimposed to apply a force to the piston rod 91, realizing stepless adjustment of the injection pressure (0 - 200 MPa), improving the accuracy of the injection pressure, and enhancing the injection response speed, thus solving the problem of rough injection pressure control in the prior art.

[0044] The second frame 2 includes a fixed base 21. Slide rails 22 are symmetrically arranged on the upper surface of the fixed base 21. The slide rails 22 are slidably connected to a sliding platform 24. A first linear motor 23 is also arranged on the upper surface of the fixed base 21. The moving part of the first linear motor 23 is fixedly connected to the sliding platform 24, enabling the sliding platform 24 to move precisely and quickly along the slide rails 22.

[0045] The mold die-casting assembly 3 is installed on the sliding platform 24. The mold die-casting assembly 3 includes a first hydraulic cylinder 31, a moving die module 32, and a fixed die module 33. Among them, the moving die module 32 includes a moving die fixing plate 321 and a moving die moving plate 322. A moving die main body 323 is detachably installed on the side of the moving die moving plate 322. A moving die ejecting assembly 34 is installed on the moving die fixing plate 321. The moving die ejecting assembly 34 movably penetrates through the moving die moving plate 322 and the moving die main body 323. After mold opening, the moving die moving plate 322 drives the moving die main body 323 to move leftward, and the ejector rod of the moving die ejecting assembly 34 relatively extends out of the moving die main body 323 to eject the integrally formed metal part.

[0046] The fixed die module 33 includes a fixed die fixing plate 331. A fixed die support layer plate 332 is fixedly installed on the side of the fixed die fixing plate 331. The fixed die main body 333 is detachably installed on the side of the fixed die support layer plate 332.

[0047] A guiding rod 36 is installed between the moving die module 32 and the fixed die module 33. The two ends of the guiding rod 36 are respectively fixedly connected to the moving die fixing plate 321, the fixed die fixing plate 331, and the fixed die support layer plate 332. The moving die moving plate 322 is slidably connected to the guiding rod 36, and the moving die moving plate 322 is fixedly connected to the telescopic end of the first hydraulic cylinder 31. By driving the first hydraulic cylinder 31, the moving die moving plate 322 moves linearly along the guiding rod 36, thereby realizing mold closing or mold opening between the moving die main body 323 and the fixed die main body 333. Moreover, cooling channels are provided inside the moving die main body 323 and the fixed die main body 333, and the cooling channels are connected to a coolant delivery device to realize cooling after metal injection molding.

[0048] A fixed mold ejection component 35 is installed on the fixed mold module 33. The fixed mold ejection component 35 includes a linear slide bar 351. The linear slide bar 351 slides through the moving mold moving plate 322, the fixed mold support layer plate 332, and the fixed mold fixing plate 331. The left end of the linear slide bar 351 is fixedly installed with a top block 352, and the right end of the linear slide bar 351 is fixedly installed with a clamp 354. An L-shaped ejection rod 355 is clamped inside the clamp 354. The other end of the L-shaped ejection rod 355 slides through the fixed mold body 333, the fixed mold support layer plate 332, and the fixed mold fixing plate 331. A spring 353 is sleeved on the right part of the linear slide bar 351. The two ends of the spring 353 are respectively abutted against the fixed mold support layer plate 332 and the clamp 354;

[0049] During mold closing, the spring 353 resets and pushes the clamp 354 to the right. The L-shaped ejection rod 355 retracts to the right into the fixed mold body 333. At the same time, the linear slide bar 351 moves to the right. After the spring 353 resets, the linear slide bar 351 stops moving. At this time, the moving mold moving plate 322 moves away from the top block 352. During mold opening, after the moving mold moving plate 322 moves to the left for a certain distance and contacts the top block 352, the moving mold moving plate 322 continues to move, driving the linear slide bar 351 to move to the left, and then driving the L-shaped ejection rod 355 to move to the left, ejecting the injection-molded metal part away from the fixed mold body 333. At this time, the spring 353 is compressed. By the action of the fixed mold ejection component 35, during mold opening, the injection-molded metal part is ejected away from the fixed mold body 333, keeping it on the moving mold body 323, preventing the injection-molded metal part from remaining in the fixed mold body 333 during mold opening.

[0050] Working principle: Driven by the first linear motor 23, the sliding platform 24 drives the die casting component 3 close to the injection barrel 10 until the discharge nozzle of the injection barrel 10 is inserted into the fixed mold body 333. Then, the first hydraulic cylinder 31 drives the moving mold moving plate 322 to drive the moving mold body 323 close to the fixed mold body 333, and the moving mold body 323 and the fixed mold body 333 are closed. During this process, the moving mold ejection component 34 retracts into the moving mold body 323, and the L-shaped ejection rod 355 of the fixed mold ejection component 35 retracts into the fixed mold body 333;

[0051] The metal raw materials and their ingredients are introduced into the melting cylinder 5 through the feeding cylinder 6. The motor 41 and the gearbox 4 drive the spiral blade conveying rod to push the raw materials through the melting cylinder 5. Through the cooperation of the high-frequency heating coil 53 and the liquid nitrogen cooling channel 55, the intelligent temperature control adjusts the metal raw materials to be melted into liquid metal, which is controlled by the stop valve 71 and introduced into the injection barrel 10. The second linear motor 8 and the second hydraulic cylinder 9 drive the injection punch 102 to push the liquid metal into the fixed mold body 333 and the moving mold body 323 to complete the metal injection molding. After the injection is completed, the second linear motor 8 and the second hydraulic cylinder 9 precisely control the injection punch 102 to retract. The first hydraulic cylinder 31 drives mold opening, and the moving mold ejection component 34 and the fixed mold ejection component 35 are used to complete the ejection of the metal product.

[0052] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0053] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding device for metal product processing, comprising: A first frame (1) and a second frame (2), wherein the first frame (1) is provided with a metal raw material melting mechanism and an injection mechanism, and the second frame (2) is provided with a die casting assembly (3); The invention is characterized in that: the injection mechanism comprises a second linear motor (8), a second hydraulic cylinder (9) and an injection barrel (10), an injection punch (102) is slidably arranged in the injection barrel (10), and the injection punch (102) is connected to the piston rod (91) of the second hydraulic cylinder (9); The piston rod (91) of the second hydraulic cylinder (9) is of a through-type, and the right end of the piston rod (91) is connected to the second linear motor (8). The second linear motor (8) comprises a linear motion module (81), and a fixed seat (82) is fixedly mounted on the side of the linear motion module (81). The fixed seat (82) is fixedly connected to the end of the piston rod (91).

2. The injection molding equipment for metal product processing according to claim 1, characterized in that: The first frame (1) is divided into two layers, the upper layer is provided with a metal raw material melting mechanism, which comprises a melting cylinder (5), the right part of the melting cylinder (5) is connected to the upper cylinder (6), and the injection mechanism is provided on the lower layer of the first frame (1).

3. The injection molding equipment for metal product processing according to claim 2, characterized in that: A spiral blade conveying rod is arranged inside the melting cylinder (5); the right end of the melting cylinder (5) is connected to a gearbox (4); the gearbox (4) is connected to a motor (41); and the spiral blade conveying rod is coaxially fixedly connected to an output shaft of the gearbox (4).

4. The injection molding equipment for metal product processing according to claim 3, characterized in that: The melting barrel (5) comprises a barrel inner layer (56), a cooling layer (54) is arranged outside the barrel inner layer (56), a liquid nitrogen cooling channel (55) is opened in the cooling layer (54), and the liquid nitrogen cooling channel (55) is connected to a liquid nitrogen conveying device. The cooling layer (54) is wrapped with a heating layer (52), and high-frequency heating coils (53) are arranged at equal intervals in the heating layer (52). The high-frequency heating coils (53) are independently controlled. The heating layer (52) is wrapped with an external protective layer (51). The left end of the melting barrel (5) is provided with a downward elbow part, and the lower end of the elbow part is fixedly connected to the guide barrel (7) through a flange, and the lower end of the guide barrel (7) is connected to the injection barrel (10) through a stop valve (71).

5. The injection molding equipment for metal product processing according to claim 4, characterized in that: A temperature sensor (101) is inserted into the wall of the injection barrel (10).

6. The injection molding equipment for metal product processing according to claim 1, characterized in that: The injection punch (102) is provided with three sets of sealing components, namely a graphite braided filler, a metal bellows compensator and a spring-preloaded silicon carbide sealing ring.

7. The injection molding equipment for metal product processing according to claim 1, characterized in that: The second frame (2) comprises a fixed base (21), the upper surface of the fixed base (21) is symmetrically provided with slide rails (22), the slide rails (22) are slidably connected to the sliding platform (24), the upper surface of the fixed base (21) is also provided with a first linear motor (23), the moving part of the first linear motor (23) is fixedly connected to the sliding platform (24), and the mold die-casting assembly (3) is installed on the sliding platform (24).

8. The injection molding equipment for metal product processing according to claim 7, characterized in that: The die casting assembly (3) comprises a first hydraulic cylinder (31), a movable die assembly (32) and a fixed die assembly (33), wherein the movable die assembly (32) comprises a movable die fixed plate (321) and a movable die movable plate (322), a movable die main body (323) is detachably mounted on the side of the movable die movable plate (322), a movable die ejection assembly (34) is mounted on the movable die fixed plate (321), and the movable die ejection assembly (34) movably penetrates the movable die movable plate (322) and the movable die main body (323).

9. The injection molding equipment for metal product processing according to claim 8, characterized in that: The fixed die group (33) comprises a fixed die fixing plate (331), a fixed die supporting layer plate (332) is fixedly mounted on the side of the fixed die fixing plate (331), a fixed die body (333) is detachably mounted on the side of the fixed die supporting layer plate (332), a guide rod (36) is installed between the movable die group (32) and the fixed die group (33), two ends of the guide rod (36) are respectively fixedly connected to the movable die fixing plate (321) and the fixed die fixing plate (331) and the fixed die supporting layer plate (332), the movable die moving plate (322) is slidably connected to the guide rod (36), and the movable die moving plate (322) is fixedly connected to the telescopic end of the first hydraulic cylinder (31).

10. The injection molding equipment for metal product processing according to claim 9, characterized in that: The fixed mold ejection assembly (35) is installed on the fixed mold group (33), and the fixed mold ejection assembly (35) comprises a linear slide rod (351), the linear slide rod (351) slides through the movable mold moving plate (322), the fixed mold supporting layer plate (332) and the fixed mold fixed plate (331), and the left end of the linear slide rod (351) is fixedly installed with an ejection block (352), and the right end of the linear slide rod (351) is fixedly installed with a clamp (354), an L-shaped ejection rod (355) is clamped in the clamp (354), and the other end of the L-shaped ejection rod (355) slides through the fixed mold body (333), the fixed mold supporting layer plate (332) and the fixed mold fixed plate (331), and a spring (353) is sleeved on the right part of the linear slide rod (351), and the two ends of the spring (353) are respectively against the fixed mold supporting layer plate (332) and the clamp (354).

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