A double sleeve injection integrated molding machine

Abstract

A double sleeve injection integrated molding machine, comprising a machine body and a fixed plate arranged on the machine body, wherein a mold is arranged on the fixed plate, and a injection mechanism for metal injection of the mold is arranged on the machine body, the injection mechanism is a first injection mechanism and a second injection mechanism which are arranged in parallel and have the same structure, and the discharge ends of the first injection mechanism and the second injection mechanism are connected to the mold through the fixed plate; the machine body is provided with a mounting assembly for simultaneously mounting the first injection mechanism and the second injection mechanism; compared with the prior art, the main supporting force components of the two injection mechanisms are the same part, thereby reducing the center distance between the two injection mechanisms, and further reducing the distance between the two pouring gates on the mold, which is suitable for molding injection of products with different sizes and shapes, and can form products that cannot be formed by the current single screw machine.

Description

Technical Field

[0001] This utility model relates to the field of metal injection molding technology, specifically to a dual-set integrated injection molding machine. Background Technology

[0002] Magnesium has a specific gravity approximately two-thirds that of aluminum and one-quarter that of iron, making it the lightest of the practical metals, while also possessing high strength and rigidity. These properties give magnesium alloys promising application prospects. Due to its low density, the greatest advantage of magnesium alloys lies in lightweighting, such as in the reduction of weight in automotive parts. The heavier the part, the more pronounced the advantages of using magnesium alloys become. Currently, semi-solid magnesium alloy products are primarily produced using injection molding machines in conjunction with molds.

[0003] Metal injection molding (MIM) machines are the core equipment in the metal injection molding (MIM) process, combining the flexibility of plastic injection molding with the material performance advantages of powder metallurgy. They form green parts by injecting a mixture of metal powder and binder (feed) into a precision mold. While the machine structure is similar to that of a plastic injection molding machine, the requirements for wear resistance, clamping force, temperature control accuracy, and repeatability are far higher. MIM machines are key equipment for the mass production of highly complex, high-precision, and high-performance small metal parts, and are widely used in consumer electronics, medical devices, automobiles, tools, and many other fields. Understanding their working principles, special requirements, and role in the entire MIM process is crucial.

[0004] Chinese Patent Application No. 201720709992.4 discloses a metal-plastic co-injection molding equipment. This equipment includes a clamping device, a two-component molding die, a semi-solid metal injection unit, and an injection molding unit. The two-component molding die is mounted on the clamping device and has a sprue. The semi-solid metal injection unit and the injection molding unit are located on the same side of the sprue of the two-component molding die and are interconnected. The equipment first forms a semi-solid metal in the semi-solid metal injection unit, then injects the semi-solid metal into the two-component molding die to form the base portion of the product. Then, it switches to the injection unit, injecting the plastic melt into the two-component molding die to form the insert portion, finally obtaining the product. Chinese Patent Application No. 202210546411.5 discloses a dual-injection molding machine with two injection units. This dual-injection molding machine consists of a clamping device, a first injection unit, and a second injection unit. The first injection unit and the second injection unit each have a heating cylinder, a screw, and a screw drive unit for driving the screw. The first injection unit and the second injection unit are arranged symmetrically with respect to the mechanical centerline of the mold clamping unit. Furthermore, the hydraulic accumulator, electric motor, and other drive system components provided in the screw drive unit are all arranged on the side of the screw drive unit away from the mechanical centerline.

[0005] Current magnesium alloy injection molding machines are mainly single-screw injection molding machines. The diameter of the screw and barrel is currently limited by technology and requires further breakthroughs. This results in products that cannot be molded with sufficient weight, while customer demand for heavier products remains unmet. The aforementioned existing technologies simply place two injection mechanisms side-by-side to achieve a dual-injection system. However, in this solution, the two injection mechanisms inject plastic and metal separately, and they do not inject simultaneously; one mechanism finishes injecting before the other can begin. This approach has low injection efficiency, and the large center distance between the two injection mechanisms results in a large distance between the two gates on the product. This makes it suitable only for long, narrow products and unsuitable for smaller products, limiting its applicability. Utility Model Content

[0006] The present invention aims to overcome the defects in the prior art and provide a dual-injection molding machine with two injection mechanisms that can perform metal injection simultaneously, and with a smaller distance between the two injection mechanisms, resulting in a smaller distance between the inlet gates of the product, suitable for injection of products of different sizes.

[0007] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a dual-set injection molding machine, comprising a machine body and a fixed plate disposed on the machine body, wherein a mold is disposed on the fixed plate, and an injection mechanism for injecting metal into the mold is disposed on the machine body, wherein the injection mechanism comprises a first injection mechanism and a second injection mechanism having the same structure and arranged in parallel, and the discharge ends of the first injection mechanism and the second injection mechanism both pass through the fixed plate and are connected to the mold; the machine body is provided with an installation component for simultaneously installing the first injection mechanism and the second injection mechanism.

[0008] As a preferred embodiment of the present invention, the injection mechanism includes a feed tube assembly and a screw assembly disposed in the feed tube assembly. One end of the screw assembly is connected to an injection cylinder assembly for driving the screw assembly to move axially and a storage assembly for driving the screw assembly to rotate.

[0009] As a preferred embodiment of the present invention, the feed tube assembly includes a nozzle, a front barrel, a pre-injection feed tube, and a post-injection feed tube connected in sequence. The screw assembly is disposed in the pre-injection feed tube and the post-injection feed tube. A feed tube fixing plate is provided between the pre-injection feed tube and the post-injection feed tube. A heat insulation plate is provided on the feed tube fixing plate. Heating coils are fitted on the nozzle, the front barrel, the pre-injection feed tube, and the post-injection feed tube.

[0010] As a preferred embodiment of the present invention, the nozzle end is provided with a nozzle top sleeve assembly for adjusting the axial distance between the nozzle and the mold. The nozzle top sleeve assembly includes an inner sleeve, an outer sleeve and a locking sleeve. The inner sleeve is sleeved on the nozzle, and the outer sleeve and the locking sleeve are both threaded to the inner sleeve. The outer sleeve is set in the direction closer to the mold, and the locking sleeve is set in the direction closer to the front barrel.

[0011] As a preferred embodiment of the present invention, the screw assembly includes an injection screw and a screw head disposed at the end of the injection screw. The screw head is provided with a fixing ring for fixed connection with the injection screw, and a check ring is sleeved on the screw head. The check ring is provided with a piston ring that abuts against the inner wall of the feed tube assembly.

[0012] As a preferred embodiment of the present invention, the injection cylinder assembly includes an injection cylinder and a cylinder front cover and a cylinder rear cover disposed at both ends of the injection cylinder. The injection cylinder is provided with a piston rod that passes through the cylinder front cover and is used to drive the screw assembly to move axially. The piston rod is provided with an injection piston that abuts against the inner wall of the injection cylinder.

[0013] As a preferred embodiment of the present invention, the storage assembly includes a storage drive mechanism, a transmission transition mechanism, and a storage seat. The transmission transition mechanism is disposed on the storage seat, and the output end of the storage drive mechanism is connected to the transmission transition mechanism. The storage seat is provided with a transmission shaft connected to the transmission transition mechanism to drive the screw assembly to rotate. The storage seat is fixedly connected to the injection cylinder assembly.

[0014] In a preferred embodiment of this utility model, the installation assembly includes a barrel fixing bracket and a barrel support bracket for fixing the first injection mechanism and the second injection mechanism. The barrel fixing bracket is disposed in the middle of the barrel assembly for fixing the barrel assembly, and the barrel support bracket is disposed at the tail of the barrel assembly for supporting the barrel assembly. A first tie rod is provided between the barrel fixing bracket and the barrel support bracket for connecting the barrel fixing bracket and the barrel support bracket. A second tie rod is provided between the barrel support bracket and the injection cylinder assembly for connecting the barrel support bracket and the injection cylinder assembly.

[0015] As a preferred embodiment of this utility model, the machine body is also provided with a base, the injection mechanism and the installation components are slidably connected to the base, the machine body is provided with a workstation lifting mechanism for raising and lowering the base, the workstation lifting mechanism includes a lifting cylinder, the lifting cylinder is fixedly installed on the machine body, and the output shaft of the lifting cylinder is connected to the base, and a number of shims are provided between the base and the machine body.

[0016] As a preferred embodiment of this utility model, the mounting assembly is provided with a moving and adjusting cylinder assembly for moving the injection mechanism. The moving and adjusting cylinder assembly includes a moving cylinder barrel and a moving cylinder piston rod slidably connected to the moving cylinder barrel. The moving cylinder barrel is hinged to the mounting assembly. The end of the moving cylinder piston rod is provided with a transition plate fixedly connected to a fixed plate. The transition plate is provided with a plurality of mounting holes arranged along its height direction. A hinge seat that is hinged to the moving cylinder piston rod is fixedly connected to the mounting holes.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. By simultaneously injecting the mold with the first and second injection mechanisms, which are set to have the same structure and are distributed in parallel, the injection efficiency is improved, and the weight of the molded product can be doubled. Furthermore, by setting both the first and second injection mechanisms on the mounting assembly, the main supporting force-bearing components of the two injection mechanisms are the same part, thereby reducing the center distance between the two injection mechanisms and thus reducing the distance between the two gates on the mold. This method is suitable for molding injection of products of different sizes and shapes, and can mold products that cannot be molded by single-screw presses at present. 2. Furthermore, a nozzle top sleeve assembly is provided at the end of the nozzle. By rotating the outer sleeve, the axial relative position between the outer sleeve and the inner sleeve is adjusted so that both ends of the nozzle top sleeve assembly are tightly attached to the mold and the nozzle respectively, and bear and transmit the force required by the injection mechanism. This reduces the distance between the nozzle and the mold, reduces the impact of this distance on metal injection, and improves the quality of product injection molding. 3. Furthermore, a lifting mechanism is installed on the base. The height of the base is adjusted by the lifting mechanism, which in turn adjusts the height of the injection mechanism, thereby meeting the injection needs of products of different sizes and shapes. 4. Furthermore, a hydraulic cylinder assembly is installed on the mounting component. The entire injection mechanism and mounting component are moved by the hydraulic cylinder assembly, thereby removing the injection mechanism from the mold. This facilitates the inspection, cleaning, and replacement of the injection mechanism and improves the efficiency of equipment maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a structural diagram of the feed tube assembly and the screw assembly; Figure 4 This is a schematic diagram of the heating coil. Figure 5 This is a schematic diagram of the nozzle top sleeve assembly; Figure 6 This is a schematic diagram of the injection cylinder assembly; Figure 7 This is a cross-sectional view of the injection cylinder assembly; Figure 8 This is a schematic diagram of the material storage assembly; Figure 9 This is a cross-sectional view of the storage assembly; Figure 10 This is a structural diagram of the installed components; Figure 11 This is a structural schematic diagram of the workstation lifting mechanism; Figure 12 This is a schematic diagram of the structure of the adjusting hydraulic cylinder assembly. Reference numerals: 1. Machine body; 2. Fixed plate; 201. Through hole; 3. Mold; 4. Injection mechanism; 4A. First injection mechanism; 4B. Second injection mechanism; 401. Material tube assembly; 4011. Nozzle; 4012. Front barrel; 4013. Front injection material tube; 4014. Rear injection material tube; 4015. Barrel fixing plate; 4016. Heat insulation plate; 4017. Heating coil; 4018. Inlet; 402. Screw assembly; 4021. Injection screw; 4022. Screw head; 4023. Retaining ring; 4024. Check ring; 4025. Piston ring; 403. Injection cylinder assembly; 4031. Injection cylinder; 4032. Piston rod; 4033. Cylinder front cover; 4034. Cylinder rear cover; 4035. Injection piston 4035, material storage assembly 404, material storage drive mechanism 4041, transmission transition mechanism 4042, transmission shaft 4043, material storage seat 4044, nozzle top sleeve assembly 405, inner sleeve 4051, outer sleeve 4052, locking sleeve 4053, mounting assembly 5, material cylinder fixing bracket 501, material cylinder support bracket 502, first pull rod 503, second pull rod 504, base 6, slide rail 601, slider 602, workstation lifting mechanism 7, lifting cylinder 701, shim block 702, adjusting cylinder assembly 8, adjusting cylinder piston rod 801, hinge seat 8011, adjusting cylinder cylinder barrel 802, transition plate 803, mounting hole 8031. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-12 As shown, a dual-set injection molding machine includes a machine body 1 and a fixed plate 2 disposed on the machine body 1. A mold 3 is disposed on the fixed plate 2. An injection mechanism 4 for injecting metal into the mold 3 is disposed on the machine body 1. The injection mechanism 4 consists of a first injection mechanism 4A and a second injection mechanism 4B with the same structure and arranged in parallel. The discharge ends of the first injection mechanism 4A and the second injection mechanism 4B both pass through the fixed plate 2 and are connected to the mold 3. An installation assembly 5 is disposed on the machine body 1 for simultaneously installing the first injection mechanism 4A and the second injection mechanism 4B.

[0021] Furthermore, the fixed plate 2 is disposed on one end of the machine body 1, the mold 3 is connected to one side of the fixed plate 2, and the injection mechanism 4 is located on the other side of the fixed plate 2. The injection mechanism 4 is arranged along the length of the machine body 1. The injection mechanism 4 is a dual injection system, that is, the injection mechanism 4 is divided into a first injection mechanism 4A and a second injection mechanism 4B. The first injection mechanism 4A and the second injection mechanism 4B are symmetrically arranged with respect to the center line of the fixed plate 2. The first injection mechanism 4A and the second injection mechanism 4B have the same structure, that is, the configuration of the first injection mechanism 4A and the second injection mechanism 4B is the same. The first injection mechanism 4A and the second injection mechanism 4B are connected by a design The mold is fixed by the mounting component 5. By configuring the first injection mechanism 4A and the second injection mechanism 4B, which are identical and symmetrically arranged, the injection efficiency is improved, and the weight of the molded product can be doubled. Furthermore, by setting both the first injection mechanism 4A and the second injection mechanism 4B on the mounting component 5, the main supporting force-bearing components of the two injection mechanisms are the same part, thereby reducing the center distance between the two injection mechanisms and thus reducing the distance between the two gates on the mold. This makes it suitable for molding injection of products of different sizes and shapes, and can mold products that cannot be molded by single-screw presses at present.

[0022] The injection mechanism 4 includes a feed tube assembly 401 and a screw assembly 402 disposed in the feed tube assembly 401. One end of the screw assembly 402 is connected to an injection cylinder assembly 403 that drives the screw assembly 402 to move axially and a storage assembly 404 that drives the screw assembly 402 to rotate. Further, the tail end of the screw assembly 402 is connected to the injection cylinder assembly 403, and the other end of the injection cylinder assembly 403 is connected to the storage assembly 404. The injection cylinder assembly 403 drives the screw assembly 402 to move axially in the feed tube assembly 401, and the storage assembly 404 drives the screw assembly 402 to rotate while moving axially, so as to transport magnesium material. The rotation of the screw assembly 402 driven by the storage assembly 404 does not affect the axial movement of the screw assembly 402 driven by the injection cylinder assembly 403, thereby realizing the simultaneous transport of magnesium material and injection of magnesium material into the mold 3.

[0023] The feed tube assembly 401 includes a nozzle 4011, a front barrel 4012, a pre-injection feed tube 4013, and a post-injection feed tube 4014 connected in sequence. A screw assembly 402 is disposed within the pre-injection feed tube 4013 and the post-injection feed tube 4014. A barrel fixing plate 4015 is provided between the pre-injection feed tube 4013 and the post-injection feed tube 4014. A heat insulation plate 4016 is provided on the barrel fixing plate 4015. The nozzle 4011, the front barrel 4012, and the post-injection feed tube 4014 are connected in sequence. Heating coils 4017 are fitted onto both the front feed tube 4013 and the post-injection feed tube 4014. Furthermore, the nozzle 4011, the front barrel 4012, the front feed tube 4013, and the post-injection feed tube 4014 are coaxially arranged. A through hole 201 is provided on the fixed plate 2, through which the nozzle 4011 passes and connects to the mold 3, allowing magnesium material to be injected into the mold 3 from the nozzle 4011. Additionally, a barrel fixing plate 4 is fitted onto the post-injection feed tube 4014. 015, a barrel fixing plate 4015 is disposed at the connection between the pre-injection feed tube 4013 and the post-injection feed tube 4014. The feed tube assembly 401 is connected and fixed to the mounting assembly 5 through the barrel fixing plate 4015. A heat insulation plate 4016 is provided on the side of the barrel fixing plate 4015 for heat insulation. The screw assembly 402 enters the pre-injection feed tube 4013 and the post-injection feed tube 4014 from the tail end of the post-injection feed tube 4014. It is also equipped with a feed port 4018, through which magnesium material is added into the post-injection feed tube 4014. The rotation of the screw assembly 402 conveys the magnesium material to the nozzle 4011, and the axial movement of the screw assembly 402 injects the magnesium material into the mold 3. Heating coils 4017 on the nozzle 4011, the front barrel 4012, the pre-injection feed tube 4013 and the post-injection feed tube 4014 continuously heat the magnesium material to ensure that the magnesium material is in a molten state.

[0024] The nozzle 4011 has a nozzle top sleeve assembly 405 at its end for adjusting the axial distance between the nozzle 4011 and the mold 3. The nozzle top sleeve assembly 405 includes an inner sleeve 4051, an outer sleeve 4052, and a locking sleeve 4053. The inner sleeve 4051 is fitted onto the nozzle 4011. The outer sleeve 4052 and the locking sleeve 4053 are both threaded onto the inner sleeve 4051. The outer sleeve 4052 is positioned closer to the mold 3, and the locking sleeve 4053 is positioned closer to the front barrel 4012. Further, the nozzle top sleeve assembly 405 is fitted onto the nozzle 4011. Specifically, the inner sleeve 4051 is fitted onto the end of the nozzle 4011, and the outer sleeve 4052 and the locking sleeve 4053 are both fitted onto the inner sleeve 4051. The outer wall of the inner sleeve 4051 is provided with external threads. The inner wall of the locking sleeve 4053 is provided with internal threads. Both the outer sleeve 4052 and the locking sleeve 4053 are threadedly connected to the inner sleeve 4051. By rotating the outer sleeve 4052, the axial relative position between the outer sleeve 4052 and the inner sleeve 4051 can be changed. By rotating the locking sleeve 4053, the inner sleeve 4051 and the outer sleeve 4052 can be locked. After locking, the inner sleeve 4051 and the outer sleeve 4052 can no longer move relative to each other. By adjusting the axial relative position between the outer sleeve 4052 and the inner sleeve 4051, the two ends of the nozzle top sleeve assembly 405 are respectively in close contact with the mold 3 and the nozzle 4011, and bear the force required to transmit the injection mechanism 4. This reduces the distance between the nozzle 4011 and the mold 3, reduces the impact of this distance on metal injection, and improves the quality of product injection molding.

[0025] The screw assembly 402 includes an injection screw 4021 and a screw head 4022 disposed at the end of the injection screw 4021. The tail end of the screw head 4022 is provided with a retaining ring 4023 for fixed connection with the injection screw 4021. A check ring 4024 is sleeved on the screw head 4022. A piston ring 4025 is provided on the check ring 4024 to abut against the inner wall of the feed tube assembly 401. Furthermore, the screw head 4022 is fixedly connected to the end of the injection screw 4021 and is connected and fixed to the injection screw 4021 through the retaining ring 4023. The check ring 4024 and the piston ring 4025 play a role in preventing backflow, allowing the magnesium material to flow from right to left, but not from left to right.

[0026] The injection cylinder assembly 403 includes an injection cylinder 4031 and a front cover 4033 and a rear cover 4034 disposed at both ends of the injection cylinder 4031. The injection cylinder 4031 has a piston rod 4032 passing through the front cover 4033 and used to drive the screw assembly 402 to move axially. The piston rod 4032 has an injection piston 4035 that abuts against the inner wall of the injection cylinder 4031. Furthermore, the injection cylinder 4031 has an oil inlet and an oil outlet, located on opposite sides of the injection piston 4035. The liquid enters the injection cylinder through the inlet and exits through the outlet. The piston rod 4032 and the injection piston 4035 move in the injection cylinder 4031. The end of the piston rod 4032 is fixedly connected to the injection screw 4021. The axial back-and-forth movement of the injection piston 4035 and the piston rod 4032 can drive the injection screw 4021 to move axially back and forth. The cylinder front cover 4033 and the cylinder rear cover 4034 are set at both ends of the injection cylinder 4031, and the injection cylinder 4031 is sealed by the cylinder front cover 4033 and the cylinder rear cover 4034.

[0027] The storage assembly 404 includes a storage drive mechanism 4041, a transmission transition mechanism 4042, and a storage base 4044. The transmission transition mechanism 4042 is disposed on the storage base 4044, and the output end of the storage drive mechanism 4041 is connected to the transmission transition mechanism 4042. The storage base 4044 is provided with a transmission shaft 4043 connected to the transmission transition mechanism 4042 to drive the screw assembly 402 to rotate. The storage base 4044 is fixedly connected to the injection cylinder assembly 403. Furthermore, the storage drive mechanism 4041 can be a servo motor or a hydraulic motor, and the transmission transition mechanism 4042 can be a... The structure can be either a pulley and a timing belt or a gearbox. The material storage drive mechanism 4041 drives the drive shaft 4043 to rotate through the transmission transition mechanism 4042. The drive shaft 4043 is connected to the piston rod 4032 of the injection cylinder assembly 403. The drive shaft 4043 and the piston rod 4032 are connected by a spline or a flat key. In this way, the drive shaft 4043 can drive the injection screw 4021 to rotate through the piston rod 4032. At the same time, the forward and backward movement of the piston rod 4032 will not affect the rotation of the drive shaft 4043, thus realizing the axial movement and rotation of the injection screw 4021.

[0028] Mounting assembly 5 includes a barrel fixing bracket 501 and a barrel support bracket 502 for fixing the first injection mechanism 4A and the second injection mechanism 4B. The barrel fixing bracket 501 is located in the middle of the barrel assembly 401 to fix the barrel assembly 401, and the barrel support bracket 502 is located at the tail of the barrel assembly 401 to support the barrel assembly 401. A first pull rod 503 is provided between the barrel fixing bracket 501 and the barrel support bracket 502 for connecting the barrel fixing bracket 501 and the barrel support bracket 502. A second pull rod 504 is provided between the barrel support bracket 502 and the injection cylinder assembly 403 for connecting the barrel support bracket 502 and the injection cylinder assembly 403. Further, after injection, the barrel 4014 is fixed to the barrel fixing bracket 501 by a barrel fixing plate 4015. Furthermore, the tail end of the injection tube 4014 is set on the barrel support bracket 502. In addition, the middle part of the injection tube 4014 of the first injection mechanism 4A and the second injection mechanism 4B is fixed on the same barrel fixing bracket 501, and the tail ends of the injection tube 4014 of the first injection mechanism 4A and the second injection mechanism 4B are fixed on the same barrel support bracket 502. Thus, the first injection mechanism 4A and the second injection mechanism 4B are fixedly supported by a barrel fixing bracket 501 and a barrel support bracket 502, thereby reducing the distance between the first injection mechanism 4A and the second injection mechanism 4B, thereby reducing the distance between the two gates on the mold 3. It is suitable for molding injection of products of different sizes and shapes, and can mold products that cannot be molded by the current single screw machine.

[0029] In addition, the barrel fixing bracket 501, the barrel support bracket 502 and the injection cylinder assembly 403 are connected and fixed by the first tie rod 503 and the second tie rod 504, and the material storage assembly 404 is connected to the injection cylinder assembly 403, so that the barrel fixing bracket 501, the barrel support bracket 502, the injection cylinder assembly 403 and the material storage assembly 404 are connected into an integral structure, which facilitates the overall movement of the injection mechanism 4.

[0030] The machine body 1 is also equipped with a base 6. The injection mechanism 4 and the mounting assembly 5 are slidably connected to the base 6. The machine body 1 is equipped with a workstation lifting mechanism 7 for raising and lowering the base 6. The workstation lifting mechanism 7 includes a lifting cylinder 701, which is fixedly mounted on the machine body 1. The output shaft of the lifting cylinder 701 is connected to the base 6. Several shims 702 are provided between the base 6 and the machine body 1. Furthermore, the base 6 is arranged along the length of the machine body 1. Several lifting cylinders 701 are provided on the machine body 1 and are evenly distributed on the base 6. At the bottom of the base 6, the output shaft of the lifting cylinder 701 is connected to the lower surface of the base 6. The lifting cylinder 701 lifts the base 6, thereby lifting the various components on the base 6, and thus raising the material tube assembly 401 to the required position. At the same time, several shims 702 are also provided on the machine body 1. The shims 702 are evenly distributed and placed between the base 6 and the machine body 1. Different height shims 702 are used for different height positions. The shims 702 support the base 6 and reduce the pressure on the position lifting mechanism 7.

[0031] The mounting assembly 5 is equipped with a shifting and adjusting cylinder assembly 8 for moving the injection mechanism 4. The shifting and adjusting cylinder assembly 8 includes a shifting cylinder cylinder 802 and a shifting cylinder piston rod 801 slidably connected to the shifting cylinder cylinder 802. The shifting cylinder cylinder 802 is hinged to the mounting assembly 5. The end of the shifting cylinder piston rod 801 is provided with a transition plate 803 fixedly connected to the fixed plate 2. The transition plate 803 is provided with a plurality of mounting holes 8031 ​​arranged along its height direction. A hinge seat 8011 is fixedly connected to the mounting holes 8031 ​​and hinged to the shifting cylinder piston rod 801. Further, a slide rail 601 is provided on the base 6 along its length direction. A slider 602 slidably connected to the slide rail 601 is provided at the bottom of the barrel fixing bracket 501, the barrel support bracket 502, and the injection cylinder assembly 403. The shifting and adjusting cylinder assembly 8 is arranged on opposite sides of the injection mechanism 4 and is arranged along the length direction of the base 6. The end of the cylinder 802 is hinged to the cylinder support bracket 502. A transition plate 803 is installed on the fixed plate 2. Multiple mounting holes 8031 ​​are provided on the transition plate 803. The hinge seat 8011 is installed in the mounting holes 8031 ​​by bolts. The end of the piston rod 801 of the adjustment cylinder is hinged to the hinge seat 8011. The cylinder 802 of the adjustment cylinder drives the cylinder support bracket 502 to move, which in turn drives other components to move on the base 6. The entire injection mechanism 4 and the mounting assembly 5 are moved by the adjustment cylinder assembly 8, thereby removing the injection mechanism 4 from the mold 3. This facilitates the inspection, cleaning and replacement of the injection mechanism 4 and improves the efficiency of equipment maintenance. In addition, the positions of the mounting holes 8031 ​​are suitable for stations of different heights. That is, when the base 6 is adjusted according to the height of the station, each station has a mounting hole 8031 ​​of the same height, so that the transition plate 803 and the piston rod 801 of the adjustment cylinder can be fixed at each station.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although this article makes extensive use of the reference numerals in the figures: machine body 1, fixed plate 2, through hole 201, mold 3, injection mechanism 4, first injection mechanism 4A, second injection mechanism 4B, feed tube assembly 401, nozzle 4011, front barrel 4012, front injection feed tube 4013, rear injection feed tube 4014, barrel fixing plate 4015, heat insulation plate 4016, heating coil 4017, feed port 4018, screw assembly 402, injection screw 4021, screw head 4022, retaining ring 4023, check ring 4024, piston ring 4025, injection cylinder assembly 403, injection cylinder 4031, piston rod 4032, cylinder front cover 4033, cylinder rear cover 4034, injection piston 4 The terms 035, 404, 4041, 4042, 4043, 4044, 405, 4051, 4052, 4053, 4054, 5055, 501, 502, 503, 504, 605, 601, 602, 703, 701, 702, 803, 803, 804, 803, 801, 802, 803, 8031, etc., are used, but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would be contrary to the spirit of this utility model.

Claims

1. A dual-set injection molding machine, comprising a machine body (1) and a fixed plate (2) disposed on the machine body (1), wherein a mold (3) is disposed on the fixed plate (2), and an injection mechanism (4) for injecting metal into the mold (3) is provided on the machine body (1), characterized in that, The injection mechanism (4) consists of a first injection mechanism (4A) and a second injection mechanism (4B) with the same structure and arranged in parallel. The discharge ends of the first injection mechanism (4A) and the second injection mechanism (4B) are both connected to the mold (3) through the fixed plate (2). The machine body (1) is provided with an installation assembly (5) for simultaneously installing the first injection mechanism (4A) and the second injection mechanism (4B).

2. The dual-set injection molding machine according to claim 1, characterized in that, The injection mechanism (4) includes a feed tube assembly (401) and a screw assembly (402) disposed in the feed tube assembly (401). One end of the screw assembly (402) is connected to an injection cylinder assembly (403) that drives the screw assembly (402) to move axially and a storage assembly (404) that drives the screw assembly (402) to rotate.

3. The dual-set injection molding machine according to claim 2, characterized in that, The feed tube assembly (401) includes a nozzle (4011), a front barrel (4012), a pre-injection feed tube (4013), and a post-injection feed tube (4014) connected in sequence. The screw assembly (402) is disposed in the pre-injection feed tube (4013) and the post-injection feed tube (4014). A feed tube fixing plate (4015) is provided between the pre-injection feed tube (4013) and the post-injection feed tube (4014). A heat insulation plate (4016) is provided on the feed tube fixing plate (4015). A heating coil (4017) is fitted on the nozzle (4011), the front barrel (4012), the pre-injection feed tube (4013), and the post-injection feed tube (4014).

4. A dual-set injection molding machine according to claim 3, characterized in that, The nozzle (4011) end is provided with a nozzle top sleeve assembly (405) for adjusting the axial distance between the nozzle (4011) and the mold (3). The nozzle top sleeve assembly (405) includes an inner sleeve (4051), an outer sleeve (4052) and a locking sleeve (4053). The inner sleeve (4051) is sleeved on the nozzle (4011). The outer sleeve (4052) and the locking sleeve (4053) are both threaded onto the inner sleeve (4051). The outer sleeve (4052) is set in the direction closer to the mold (3), and the locking sleeve (4053) is set in the direction closer to the front barrel (4012).

5. A dual-set injection molding machine according to claim 2, characterized in that, The screw assembly (402) includes an injection screw (4021) and a screw head (4022) disposed at the end of the injection screw (4021). The tail end of the screw head (4022) is provided with a fixing ring (4023) for fixed connection with the injection screw (4021). A check ring (4024) is sleeved on the screw head (4022), and a piston ring (4025) is provided on the check ring (4024) to abut against the inner wall of the feed tube assembly (401).

6. A dual-set injection molding machine according to claim 2, characterized in that, The injection cylinder assembly (403) includes an injection cylinder (4031) and a cylinder front cover (4033) and a cylinder rear cover (4034) disposed at both ends of the injection cylinder (4031). The injection cylinder (4031) is provided with a piston rod (4032) that passes through the cylinder front cover (4033) and is used to drive the screw assembly (402) to move axially. The piston rod (4032) is provided with an injection piston (4035) that abuts against the inner wall of the injection cylinder (4031).

7. A dual-set injection molding machine according to claim 2, characterized in that, The storage assembly (404) includes a storage drive mechanism (4041), a transmission transition mechanism (4042), and a storage seat (4044). The transmission transition mechanism (4042) is disposed on the storage seat (4044), and the output end of the storage drive mechanism (4041) is connected to the transmission transition mechanism (4042). The storage seat (4044) is provided with a transmission shaft (4043) that is connected to the transmission transition mechanism (4042) to drive the screw assembly (402) to rotate. The storage seat (4044) is fixedly connected to the injection cylinder assembly (403).

8. A dual-set injection molding machine according to claim 2, characterized in that, The mounting assembly (5) includes a barrel fixing bracket (501) and a barrel support bracket (502) for fixing the first injection mechanism (4A) and the second injection mechanism (4B). The barrel fixing bracket (501) is located in the middle of the tube assembly (401) for fixing the tube assembly (401). The barrel support bracket (502) is located at the tail of the tube assembly (401) for supporting the tube assembly (401). A first pull rod (503) is provided between the barrel fixing bracket (501) and the barrel support bracket (502) for connecting the barrel fixing bracket (501) and the barrel support bracket (502). A second pull rod (504) is provided between the barrel support bracket (502) and the injection cylinder assembly (403) for connecting the barrel support bracket (502) and the injection cylinder assembly (403).

9. A dual-set injection molding machine according to claim 1, characterized in that, The machine body (1) is also provided with a base (6), the injection mechanism (4) and the mounting assembly (5) are slidably connected to the base (6), the machine body (1) is provided with a workstation lifting mechanism (7) for lifting the base (6), the workstation lifting mechanism (7) includes a lifting cylinder (701), the lifting cylinder (701) is fixedly set on the machine body (1), and the output shaft of the lifting cylinder (701) is connected to the base (6), and a number of shims (702) are provided between the base (6) and the machine body (1).

10. A dual-set injection molding machine according to claim 1, characterized in that, The mounting assembly (5) is provided with a moving adjustment cylinder assembly (8) for moving the injection mechanism (4). The moving adjustment cylinder assembly (8) includes a moving cylinder barrel (802) and a moving cylinder piston rod (801) slidably connected to the moving cylinder barrel (802). The moving cylinder barrel (802) is hinged to the mounting assembly (5). The end of the moving cylinder piston rod (801) is provided with a transition plate (803) fixedly connected to the fixed plate (2). The transition plate (803) is provided with a plurality of mounting holes (8031) arranged along its height direction. The mounting holes (8031) are fixedly connected with hinge seats (8011) that are hinged to the moving cylinder piston rod (801).

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