Injection molding apparatus for metal product processing

Abstract

The application discloses a kind of injection molding equipment for metal product processing, comprising: first rack and second rack, first rack is provided with metal raw material melting mechanism and injection mechanism, second rack is provided with mold die-casting assembly, injection mechanism includes second linear motor, second hydraulic cylinder and injection cylinder, injection cylinder is slidably provided with injection punch, injection punch is connected with the piston rod of second hydraulic cylinder, the piston rod of second hydraulic cylinder is through type, the right end of the piston rod is connected with second linear motor, second linear motor includes linear movement module, linear movement module side fixed mounting fixed seat, the end of fixed seat is fixedly connected with the piston rod.The present application realizes stepless regulation of injection pressure, improves the accuracy of injection pressure, and improves the response speed of injection, solves the problem of injection pressure control in the prior art.

Description

Technical Field

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

[0002] The metal product injection molding equipment 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. When pressure is applied to the movable mold assembly to close the fixed mold and the movable mold, molten metal liquid 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] Existing metal product injection molding equipment 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 device for metal product processing in order to solve the problems raised above. Summary of the Invention

[0005] The object of the present invention is to provide an injection molding device for processing metal products to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an injection molding device for processing metal products, comprising: a first frame and a second frame, the first frame being provided with a metal raw material melting mechanism and an injection mechanism, and the second frame being provided with a die-casting mold assembly;

[0007] The injection mechanism comprises a second linear motor, a second hydraulic cylinder and an injection barrel, wherein an injection punch is slidably arranged in the injection barrel, 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 of a through-type, and the right end of the piston rod is connected to the second linear motor. The second linear motor includes a linear motion module. A fixed seat is fixedly installed on the side of the linear motion module, and the fixed seat is fixedly connected to the end of the piston rod.

[0009] Preferably, the first frame is divided into two 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 the loading cylinder, and the injection mechanism is provided on the lower layer of the first frame.

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

[0011] Preferably, the melting barrel includes a barrel inner layer, a cooling layer is arranged outside the barrel inner layer, a liquid nitrogen cooling channel is opened in the cooling layer, the liquid nitrogen cooling channel is connected to the liquid nitrogen conveying device, the cooling layer is wrapped around the heating layer, high-frequency heating coils are equidistantly arranged in the heating layer, the high-frequency heating coils are independently controlled, and the heating layer is wrapped around the outer protective layer. A downward elbow part is provided at the left end of the melting barrel, the lower end of the elbow part is fixedly connected to the guide barrel through a flange, and the lower end of the guide barrel is connected to the injection barrel through a stop valve.

[0012] Preferably, a temperature sensor is inserted into the wall of the syringe barrel.

[0013] Preferably, the injection punch 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.

[0014] Preferably, the second frame includes a fixed base, the upper surface of the fixed base is symmetrically provided with slide rails, the slide rails are slidably connected to the sliding platform, the upper surface of the fixed base is also provided with a first linear motor, the moving part of the first linear motor is fixedly connected to the sliding platform, and the mold die-casting assembly is installed on the sliding platform.

[0015] Preferably, the mold die-casting assembly includes a first hydraulic cylinder, a movable die group and a fixed die group, wherein the movable die group includes a movable die fixed plate and a movable die movable plate, the movable die main body is detachably installed on the side of the movable die movable plate, the movable die ejection assembly is installed on the movable die fixed plate, and the movable die ejection assembly movably passes through the movable die movable plate and the movable die main body.

[0016] Preferably, the fixed die group includes a fixed die fixing plate, a fixed die supporting layer plate is fixedly installed on the side of the fixed die fixing plate, and a fixed die body is detachably installed on the side of the fixed die supporting layer plate. A guide rod is installed between the movable die group and the fixed die group, and both ends of the guide rod are fixedly connected to the movable die fixing plate, the fixed die fixing plate and the fixed die supporting layer plate respectively. The movable die movable plate is slidably connected to the guide rod, and the movable die movable plate is fixedly connected to the telescopic end of the first hydraulic cylinder.

[0017] Preferably, a fixed mold ejection assembly is installed on the fixed mold group, and the fixed mold ejection assembly includes a linear slide rod, which slides through the movable mold moving plate, the fixed mold supporting layer plate and the fixed mold fixed plate, and the left end of the linear slide rod is fixedly installed with a ejection block, and the right end of the linear slide rod is fixedly installed with a clamp, and an L-shaped ejector rod is clamped in the clamp, and the other end of the L-shaped ejector rod slides through the fixed mold body, the fixed mold supporting layer plate and the fixed mold fixed plate, and a spring is sleeved on the right part of the linear slide rod, and the two ends of the spring are respectively against the fixed mold supporting layer plate and the clamp.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

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

[0020] 2. The cooling layer is provided with a liquid nitrogen cooling channel, and the high-frequency heating coil is arranged at equal intervals in the heating layer, and the high-frequency heating coil is independently controlled, 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 DRAWINGS

[0021] Figure 1 The structure of the present application is shown in the schematic diagram;

[0022] Figure 2 The structure of the present application is shown in the schematic diagram;

[0023] Figure 3 The structure of the present application is shown in the schematic diagram;

[0024] Figure 4 The structure of the present application is shown in the schematic diagram;

[0025] Figure 5 The structure of the present application is shown in the schematic diagram; Figure 4

[0026] Figure 6 The structure of the present application is shown in the schematic diagram;

[0027] Figure 7 The structure of the present application is shown in the schematic diagram;

[0028] Figure 8 The structure of the present application is shown in the schematic diagram;

[0029] Figure 9 The structure of the present application is shown in the schematic diagram;

[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 group; 321. Moving die fixed plate; 322. Moving die moving plate; 323. Moving die main body; 33. Fixed die group; 331. Fixed die fixed plate; 332. Fixed die support plate; 333. Fixed die main body; 34. Moving die ejector assembly; 35. Fixed die ejector assembly; 351. Linear slide; 352. Ejector block; 353. Spring Spring; 354, clamp; 355, L-shaped ejector rod; 36, guide rod; 4, gearbox; 41, motor; 5, melting barrel; 51, outer protective layer; 52, heating layer; 53, high-frequency heating coil; 54, cooling layer; 55, liquid nitrogen cooling channel; 56, barrel inner layer; 6, loading barrel; 7, guide barrel; 71, stop valve; 8, second linear motor; 81, linear motion module; 82, fixed seat; 9, second hydraulic cylinder; 91, piston rod; 10, syringe barrel; 101, temperature sensor; 102, injection punch. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-9 The present invention provides a technical solution: an injection molding device for processing metal products, comprising: a first frame 1 and a second frame 2, the first frame 1 is provided with a metal raw material melting mechanism and an injection mechanism, the second frame 2 is provided with a mold die-casting component 3, 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 mold die-casting component 3 for integrated forming.

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

[0034] A spiral blade conveying rod is provided in the melting cylinder 5. The right end of the melting cylinder 5 is connected to the gearbox 4. The gearbox 4 is connected to the motor 41. The spiral blade conveying rod is coaxially fixedly connected to the output shaft of the gearbox 4 to achieve automatic rotation of the spiral blade conveying rod, and the material fed into the feeding cylinder 6 is pushed along the melting cylinder 5 to the left end.

[0035] The melting cylinder 5 comprises a cylinder inner layer 56, a cooling layer 54 arranged outside the cylinder inner layer 56, a liquid nitrogen cooling channel 55 arranged in the cooling layer 54, and a liquid nitrogen delivery device connected to the liquid nitrogen cooling channel 55 for delivering liquid nitrogen into the cooling layer 54 to cool and regulate the liquid metal in the cylinder inner layer 56;

[0036] The cooling layer 54 is wrapped by a heating layer 52, and 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, and the heating layer 52 is wrapped by an outer protective layer 51;

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

[0038] The melting cylinder 5 is provided with a downward elbow portion at the left end, the elbow portion is fixedly connected to a flow guide cylinder 7 through a flange at the lower end, the flow guide cylinder 7 is connected to an injection cylinder 10 through a stop valve 71 at the lower end, and 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 rack 1, and comprises a second linear motor 8, a second hydraulic cylinder 9, and the injection cylinder 10, the cylinder wall of the injection cylinder 10 is inserted into a temperature sensor 101 for feeding back the temperature of the liquid metal in the injection cylinder 10, the temperature at the position is read by a control system, and the temperature of the liquid metal is adjusted by the high-frequency heating coils 53 and the liquid nitrogen cooling channel 55 to realize intelligent temperature control of the liquid metal.

[0040] The injection cylinder 10 is slidably provided with an injection punch 102, the injection punch 102 is connected to a piston rod 91 of the second hydraulic cylinder 9, and the piston rod 91 is a tungsten carbide coated aluminum alloy core body that can withstand high temperature.

[0041] The injection punch 102 is provided with three groups of sealing elements, which are graphite woven packing, metal bellows compensator, and spring pre-tightened silicon carbide sealing ring, respectively, to increase the sealing performance of the injection punch 102 and the inner wall of the injection cylinder 10 and ensure the stable advancement 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 comprises a linear movement module 81, a fixed seat 82 is fixedly installed on the side surface of the linear movement module 81, and the fixed seat 82 is fixedly connected to the end of the piston rod 91.

[0043] Under normal circumstances, the second linear motor 8 drives the piston rod 91 to advance, and then the liquid metal in the injection cylinder 10 is injected into the mold die-casting component 3. When a large thrust injection is required, the second hydraulic cylinder 9 is started, and the piston rod 91 is exerted with a force through the superposition of hydraulic pressure and electromagnetic thrust of the second linear motor 8, thereby realizing stepless adjustment of the injection pressure (0-200MPa), improving the accuracy of the injection pressure, and increasing the response speed of the injection, thereby solving the problem of extensive injection pressure control in the prior art.

[0044] The second frame 2 includes a fixed base 21, and slide rails 22 are symmetrically arranged on the upper surface of the fixed base 21. The slide rails 22 are slidably connected to the 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, so that the sliding platform 24 can move accurately and quickly along the slide rails 22.

[0045] The die-casting assembly 3 is mounted on the sliding platform 24. The die-casting assembly 3 includes a first hydraulic cylinder 31, a movable die assembly 32, and a fixed die assembly 33. The movable die assembly 32 includes a movable die fixed plate 321 and a movable die movable plate 322. The movable die movable plate 322 has a movable die main body 323 detachably mounted on its side. The movable die fixed plate 321 is mounted with a movable die ejector assembly 34. The movable die ejector assembly 34 movably penetrates the movable die movable plate 322 and the movable die main body 323. After mold separation, the movable die movable plate 322 drives the movable die main body 323 to move leftward, and the ejector rod of the movable die ejector assembly 34 extends relatively from the movable die main body 323 to eject the integrally formed metal part.

[0046] The fixed mold assembly 33 includes a fixed mold fixing plate 331, a fixed mold supporting layer 332 is fixedly mounted on the side of the fixed mold fixing plate 331, and a fixed mold body 333 is detachably mounted on the side of the fixed mold supporting layer 332;

[0047] A guide rod 36 is installed between the movable mold group 32 and the fixed mold group 33. The two ends of the guide rod 36 are fixedly connected to the movable mold fixed plate 321, the fixed mold fixed plate 331 and the fixed mold support layer plate 332 respectively. The movable mold movable plate 322 is slidably connected to the guide rod 36, and the movable mold movable plate 322 is fixedly connected to the telescopic end of the first hydraulic cylinder 31. The movable mold movable plate 322 is driven by the first hydraulic cylinder 31 to move linearly along the guide rod 36, thereby realizing the closing or opening of the movable mold body 323 and the fixed mold body 333, and the movable mold body 323 and the fixed mold body 333 have built-in cooling channels, which are connected to the coolant delivery device to realize cooling after metal injection molding.

[0048] A fixed mold ejection assembly 35 is installed on the fixed mold group 33. The fixed mold ejection assembly 35 includes a linear slide 351. The linear slide 351 slides through the movable mold moving plate 322, the fixed mold support layer plate 332 and the fixed mold fixed plate 331. The left end of the linear slide 351 is fixedly installed with a ejection block 352, and the right end of the linear slide 351 is fixedly installed with a clamp 354. The clamp 354 clamps an L-shaped ejection rod 355. 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 fixed plate 331. A spring 353 is sleeved on the right part of the linear slide 351, and the two ends of the spring 353 respectively abut against the fixed mold support layer plate 332 and the clamp 354.

[0049] When the mold is closed, the spring 353 resets and pushes the clamp 354 to the right, and the L-shaped ejector rod 355 retracts to the right into the fixed mold body 333. At the same time, the linear slide 351 moves to the right. After the spring 353 is reset, the linear slide 351 no longer moves. At this time, the movable mold moving plate 322 moves away from the ejector block 352. When the mold is parted, the movable mold moving plate 322 moves to the left for a distance and then contacts the ejector block 352. The movable mold moving plate 322 continues to move, driving the linear slide 351 to move left, and then driving the L-shaped ejector rod 355 to move left, pushing the molded metal part away from the fixed mold body 333. At this time, the spring 353 is compressed, and the fixed mold ejector assembly 35 is used to push the molded metal part away from the fixed mold body 333 during mold parting, so that it remains on the movable mold body 323, preventing the molded metal part from remaining in the fixed mold body 333 during mold parting.

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

[0051] The metal raw materials and their ingredients are introduced into the melting tube 5 through the feeding barrel 6, and the spiral blade conveying rod is driven by the motor 41 and the gearbox 4 to push the raw materials through the melting tube 5. Through the cooperation of the high-frequency heating coil 53 and the liquid nitrogen cooling channel 55, the metal raw materials are melted into liquid metal by intelligent temperature control and regulated. The shut-off valve 71 controls the introduction into the injection barrel 10, and 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 movable 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 accurately control the injection punch 102 to retract, the first hydraulic cylinder 31 drives the mold separation, and the movable mold ejection assembly 34 and the fixed mold ejection assembly 35 are used to complete the ejection of the metal product.

[0052] That which is not described in detail in the specification is considered to be known by those skilled in the art.

[0053] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as 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); 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), a fixed seat (82) is fixedly mounted on the side of the linear motion module (81), and the fixed seat (82) is fixedly connected to the end of the piston rod (91); The first frame (1) is divided into two 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 the upper cylinder (6), and the injection mechanism is provided in the lower layer of the first frame (1); The melting barrel (5) comprises a barrel inner layer (56), a cooling layer (54) is provided outside the barrel inner layer (56), a liquid nitrogen cooling channel (55) is provided in the cooling layer (54), the liquid nitrogen cooling channel (55) is connected to the liquid nitrogen conveying device, the cooling layer (54) is wrapped with a heating layer (52), high-frequency heating coils (53) are equidistantly provided in the heating layer (52), the high-frequency heating coils (53) are independently controlled, and 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 portion, the lower end of the elbow portion 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); The second frame (2) includes a fixed base (21), a slide rail (22) is symmetrically arranged on the upper surface of the fixed base (21), the slide rail (22) is slidably connected to the sliding platform (24), a first linear motor (23) is also arranged on the upper surface of the fixed base (21), a moving part of the first linear motor (23) is fixedly connected to the sliding platform (24), and a mold die-casting assembly (3) is installed on the sliding platform (24); 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 a 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); 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 main 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); The fixed mold group (33) is provided with a fixed mold ejection assembly (35), the fixed mold ejection assembly (35) comprising a linear slide (351), the linear slide (351) slidingly passing 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 (351) is fixedly provided with a ejection block (352), the right end of the linear slide (351) is fixedly provided with a clamp (354), an L-shaped ejection rod (355) is clamped in the clamp (354), the other end of the L-shaped ejection rod (355) slidingly passing 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 (351), the two ends of the spring (353) respectively abutting against the fixed mold supporting layer plate (332) and the clamp (354).

2. The injection molding equipment for metal product processing according to claim 1, characterized in that: A spiral blade conveying rod is provided in the melting cylinder (5), the right end of the melting cylinder (5) is connected to the gearbox (4), the gearbox (4) is connected to the motor (41), and the spiral blade conveying rod is coaxially fixedly connected to the output shaft of the gearbox (4).

3. The injection molding equipment for metal product processing according to claim 1, characterized in that: A temperature sensor (101) is inserted into the wall of the injection barrel (10).

4. 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.

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