Metal powder injection molding waste recycling machine

Abstract

The utility model provides a metal powder injection molding waste recycling machine, and relates to the technical field of metal powder injection molding, the metal powder injection molding waste recycling machine comprises a rack, and a crushing mechanism, a feeding mechanism, a mixing mechanism and a control part which are arranged on the rack, the crushing mechanism comprises a crushing cavity and a crushing roller arranged in the crushing cavity; the feeding mechanism comprises a first feeding bin communicating with the smashing cavity and a second feeding bin used for containing new materials. The mixing mechanism comprises a mixing bin and a stirring assembly arranged in the mixing bin; feeding assemblies are arranged between the two feeding bins and the mixing bin; the control part is triggered to drive the hopper to suck waste into the smashing cavity and smash the waste to form secondary materials, the secondary materials fall into the first feeding bin, meanwhile, the two feeding assemblies are promoted to correspondingly regulate and control the proportion of the secondary materials and new materials entering the mixing bin, and the stirring assembly is driven to evenly mix the materials. Therefore, the problems of material loss, low efficiency, easiness in environmental pollution and harm to human health in existing metal powder injection molding waste recovery are solved.

Description

Technical Field

[0001] This utility model relates to the field of metal powder injection molding technology, and more specifically, to a metal powder injection molding waste recycling machine. Background Technology

[0002] Metal powder injection molding technology is a product of the interpenetration and intersection of multiple disciplines such as plastic molding technology, polymer chemistry, powder metallurgy technology, and metal materials science. Using molds, it can injection mold preforms and rapidly manufacture high-density, high-precision, three-dimensional complex-shaped structural parts through sintering. It can quickly and accurately materialize design ideas into products with specific structural and functional characteristics and directly mass-produce parts, representing a new revolution in the manufacturing technology industry. The process involves selecting suitable metal powder and an organic binder, mixing them into a uniform feedstock under specific temperature conditions using appropriate methods, then granulating the feedstock and injecting it into a mold cavity under heated and plasticized conditions to obtain a preform. The preform is then degreased through chemical or solvent extraction methods, and finally sintered to densify it, yielding the final product. Similar to plastic parts, metal powder molded parts require the treatment of waste materials such as sprues and defective products. Currently, the treatment of metal powder injection molding waste requires separate manual and crushing equipment processing. After processing, the waste needs to be mixed with virgin material in a specific ratio to achieve waste recycling. During the crushing and mixing process, manual handling easily leads to material loss, and some waste materials contain substances harmful to human health, which is detrimental to the health of operators. Furthermore, the waste processing involves numerous steps, resulting in low efficiency and generating dust. In summary, existing methods for recycling metal powder injection molding waste suffer from problems such as material loss, low efficiency, environmental pollution, and harm to human health. Utility Model Content

[0003] This utility model discloses a metal powder injection molding waste recycling machine, which aims to improve the existing problems of material loss, low efficiency, easy environmental pollution and harm to human health in the recycling of metal powder injection molding waste.

[0004] The present invention adopts the following solution:

[0005] A metal powder injection molding waste recycling machine includes a frame and a crushing mechanism, a feeding mechanism, a mixing mechanism, and a control unit disposed on the frame. The crushing mechanism includes a crushing chamber and a crushing roller disposed within the crushing chamber. The feeding mechanism includes a first feeding bin communicating with the crushing chamber and a second feeding bin for holding new material. The mixing mechanism includes a mixing bin and a stirring assembly disposed within the mixing bin. A feeding assembly is disposed between each of the two feeding bins and the mixing bin. By triggering the control unit, the hopper is driven to suck waste material into the crushing chamber and crush it into secondary material, which falls into the first feeding bin. Simultaneously, the two feeding assemblies are directed to adjust the ratio of secondary material to new material entering the mixing bin, and the stirring assembly is driven to uniformly mix the materials.

[0006] As a further improvement, multiple rings of crushing teeth are arranged along the outer periphery of the crushing roller, wherein at least one ring of crushing teeth has higher teeth than the other rings of crushing teeth, and jaw plates are formed or installed on the side walls of the crushing chamber, and the waste material is crushed by the cooperation of the crushing teeth with the grooves on the jaw plates.

[0007] As a further improvement, the cross-section of each feed bin decreases from the feed end to the discharge end, and each feed bin is equipped with a rotary paddle level switch electrically connected to the control component to control the amount of material in the feed bin.

[0008] As a further improvement, the feeding assembly includes a feeding channel, a screw disposed in the feeding channel, and a drive component for driving the screw to rotate; wherein the feeding channel is arranged perpendicular to the discharge direction of the feed hopper, its inlet is connected to the feed hopper, and its outlet is connected to the mixing hopper.

[0009] As a further improvement, the mixing chamber is provided with at least one discharge port, which is connected to the first channel of the four-way connector. The four-way connector also includes a second channel, a third channel, and a fourth channel. The second channel is positioned opposite the first channel and is equipped with a cylinder. The cylinder is moved by the control component to control the opening and closing of the discharge port. The third channel is positioned opposite to the fourth channel and adjacent to the first channel. The third channel is used to connect to the discharge pipe. The fourth channel is equipped with a filter and a blower, which cleans the dust in the discharge pipe.

[0010] As a further improvement, the discharge pipe is connected to the injection molding machine, and the remaining material on the injection molding machine is detected by a switching valve electrically connected to the control unit to control the start and stop of the feeding assembly.

[0011] As a further improvement, the stirring assembly includes a stirring shaft and a plurality of stirring blades mounted or formed on the stirring shaft, wherein each stirring blade has a hollow center and a tail bent in the direction of rotation.

[0012] As a further improvement, both the mixing chamber and the feeding channel are provided with openable and closable covers on their bottom surfaces, and the cleaning port on the bottom surface can be exposed by pulling out the covers.

[0013] As a further improvement, the first feed hopper is provided with a discharge port near the discharge position, and the outlet end of the discharge port is equipped with a detachable cover.

[0014] As a further improvement, a cyclone separator is also included to separate and collect dust within the recycling machine.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0016] 1. In this application, waste material is drawn into the crushing chamber via a hopper and crushed to form secondary material. This secondary material falls into the first feed hopper, while virgin material is placed in the second feed hopper. The ratio of secondary material to virgin material entering the mixing hopper is adjusted by the feeding assembly, while the mixing assembly uniformly mixes the virgin and secondary material. Thus, the entire process of waste crushing, quantitative mixing of secondary and virgin material, and uniform stirring is achieved within the recycling machine, eliminating the need for manual intervention. This effectively improves work efficiency and reduces material loss due to manual handling. Furthermore, since both crushing and mixing processes are carried out within the recycling machine, environmental pollution caused by dust and other emissions is reduced, and the health effects of harmful substances during the crushing process are avoided.

[0017] 2. The crushing roller is equipped with multiple rings of short teeth and two rings of high teeth. The high teeth can split and impact large pieces of waste, while the small teeth crush the waste to the required size. The shape of the crushing teeth can be pyramidal, bullet-shaped, cylindrical, etc., without specific limitations.

[0018] 3. The cross-section of each feed hopper decreases from the feed end to the discharge end, so that the material gathers at the discharge port at the bottom under the action of gravity. Each feed hopper is equipped with a rotary paddle level switch that is electrically connected to the control unit to control the amount of material in the feed hopper. When the rotary paddle level switch reaches the set pressure range, the control unit drives the hopper to stop sucking up waste material, thereby avoiding the feed hopper from overflowing.

[0019] 4. Each feeding hopper and mixing hopper is equipped with a feeding channel. A control unit drives the corresponding screw to rotate at a preset speed, regulating the feeding speed of each feeding hopper and achieving quantitative mixing. The control unit sets the rotation speed, precisely controlling the mixing ratio, eliminating the need for manual mixing, ensuring mixing efficiency, and avoiding material waste caused by spillage or incorrect mixing ratios. Simultaneously, the control unit drives the agitator to rotate, making the mixing time and speed controllable, ensuring uniform mixing of secondary and nascent materials entering the mixing hopper.

[0020] 5. The mixing assembly includes a mixing shaft and multiple mixing blades mounted or formed on the mixing shaft. Each mixing blade has a hollow center to reduce resistance during mixing. The tail of the mixing blades is bent in the direction of rotation to scoop up material during rotation, thus accelerating mixing. The driving device for the mixing shaft is preferably a motor or electric motor, which is electrically connected to a control unit. The speed is set by the control unit to ensure uniform mixing.

[0021] 6. Both the mixing chamber and the feeding channel are equipped with openable covers on their bottom surfaces. These covers are pulled out to reveal the cleaning ports. For example, the mixing chamber has a first cover, and the feeding channel has a second cover. Operators can remove the first and second covers sequentially before or after mixing to clean any remaining material from the feeding channel and mixing chamber. The cleaning ports facilitate cleaning of the equipment and ensure that no material residue remains in the feeding channel and mixing chamber, thus guaranteeing the accuracy of the mixing ratio.

[0022] 7. The first feed hopper is equipped with a discharge port near the discharge point, and a detachable cover is provided at the outlet end of the discharge port. For example, a discharge pipe extends downward along the periphery of the discharge port, and the discharge pipe is threaded. The cover is connected to the discharge pipe through the thread, so that in the event of a malfunction or other problem requiring rapid discharge, the cover can be opened to quickly release the secondary material in the feed hopper.

[0023] 8. Cyclone separator, used to separate and collect dust in the recycling machine to further reduce dust pollution to the environment during the waste recycling process.

[0024] 9. The discharge pipe is connected to the injection molding machine. The remaining material in the injection molding machine is detected by the switching valve that is electrically connected to the control components, so as to control the start and stop of the feeding component, thereby preventing the injection molding machine from having too much material, which may cause blockage and other malfunctions. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figures 1 to 3 This is a structural schematic diagram of one embodiment of the present invention from different perspectives;

[0027] Figure 4 and Figure 5 This is a schematic diagram of the structure of a hidden cabinet door in one embodiment of this utility model from different perspectives;

[0028] Figure 6 yes Figure 3 Sectional view of AA;

[0029] Figure 7 yes Figure 3 Sectional view of BB;

[0030] Figure 8 yes Figure 3 Sectional view of CC;

[0031] Figure 9 yes Figure 3 Sectional view of DD;

[0032] Figure 10 yes Figure 3 Sectional view of EE;

[0033] Figure 11 This is a schematic diagram of the crushing mechanism according to one embodiment of the present invention;

[0034] Figure 12 This is a cross-sectional view of the crushing mechanism according to one embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the structure of the crushing mechanism with the crushing chamber hidden in one embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the structure of the feeding assembly, the conveying assembly, and the mixing assembly according to one embodiment of the present invention;

[0037] Figure 15 and Figure 16 yes Figure 14 Cross-sectional views along different sections;

[0038] Figure 17 yes Figure 14 Structural diagrams from different perspectives;

[0039] Figure 18 This is a schematic diagram of the screw structure according to one embodiment of the present invention.

[0040] icon:

[0041] 1-Frame; 11-Cabinet door; 12-Roller; 13-Brake pad;

[0042] 2-Grinding mechanism; 21-Grinding chamber; 211-Jaw plate; 22-Grinding roller; 221-Short tooth; 222-High tooth;

[0043] 3-Feeding mechanism; 31-First feed bin; 311-Discharge port; 312-Discharge pipe; 32-Second feed bin; 321-Binary door; 33-Second boss; 34-Handle; 35-Rotary paddle level switch; 351-Rotating plate;

[0044] 4-Mixing mechanism; 41-Mixing chamber; 411-Discharge port; 42-Agitator shaft; 43-Agitator blades; 431-Hollowed out; 432-Tail end; 44-Driver;

[0045] 5-Control components;

[0046] 6-Feeding assembly; 61-Feeding channel; 611-Inlet; 612-Outlet; 613-First boss; 62-Screw; 621-Helical blade; 63-Drive component;

[0047] 7-Hopper;

[0048] 81 - First cover plate; 82 - Second cover plate;

[0049] 9-Four-way connector;

[0050] A1 - Cylinder; A11 - Plug;

[0051] B1 - Discharge pipe;

[0052] C1-Filter;

[0053] D1 - Cyclone separator;

[0054] E1 - Switching valve. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0056] Example

[0057] Combination Figures 1 to 18This embodiment provides a metal powder injection molding waste recycling machine, including a frame 1 and a crushing mechanism 2, a feeding mechanism 3, a mixing mechanism 4, and a control component 5 configured on the frame 1. The crushing mechanism 2 includes a crushing chamber 21 and a crushing roller 22 configured in the crushing chamber 21. The feeding mechanism 3 includes a first feeding bin 31 communicating with the crushing chamber 21 and a second feeding bin 32 for holding new material. The mixing mechanism 4 includes a mixing bin 41 and a stirring component configured in the mixing bin 41. A feeding component 6 is configured between the two feeding bins and the mixing bin 41. By triggering the control component 5, the hopper 7 is driven to suck the waste material into the crushing chamber 21 and crush it to form secondary material that falls into the first feeding bin 31. At the same time, the two feeding components 6 are prompted to adjust the ratio of secondary material and new material entering the mixing bin 41, and drive the stirring component to mix the materials evenly.

[0058] For example, the frame 1 is equipped with openable cabinet doors 11 around its perimeter, and the bottom of the frame 1 is equipped with casters 12, each caster 12 having a brake pad 13. When the recycling machine needs to be moved, the brake pad 13 is raised, and after moving to the desired position, the brake pad 13 is pressed down to brake, thus facilitating the movement of the recycling machine. The hopper 7 is configured to suck up waste material through negative pressure. The control unit 5 is located on the top of the frame 1, including a human-machine interface and a PLC. The human-machine interface is preferably a touch screen. The circuit principle and structure of the control unit 5 are existing technologies and will not be described in detail here.

[0059] It should be noted that in this embodiment, waste material is drawn into the crushing chamber 21 via the hopper 7 and crushed to form secondary material. This secondary material falls into the first feed hopper 31, while virgin material is placed in the second feed hopper 32. The feeding assembly 6 adjusts the ratio of secondary material to virgin material entering the mixing hopper 41, while the stirring assembly uniformly mixes the virgin and secondary material. Thus, the entire process of waste crushing, quantitative mixing of secondary and virgin material, and uniform stirring is achieved within the recycling machine without manual intervention, effectively improving work efficiency and reducing material loss due to manual handling. Furthermore, since both crushing and mixing processes are carried out within the recycling machine, environmental pollution caused by dust and other external emissions is reduced, and the impact of harmful substances on human health during the crushing process is avoided.

[0060] In a preferred embodiment, multiple rings of crushing teeth are arranged along the outer periphery of the crushing roller 22, wherein at least one ring of crushing teeth has higher teeth than the other rings. Jaw plates 211 are formed or installed on the side walls of the crushing chamber 21, and the crushing teeth and the grooves on the jaw plates 211 are used to crush the waste. Specifically, in this embodiment, multiple rings of short teeth 221 and two rings of high teeth 222 are provided. The high teeth 222 can split and impact large pieces of waste, while the small teeth crush the waste to the required size. The shape of the crushing teeth can be pyramidal, bullet-shaped, cylindrical, etc., and is not specifically limited.

[0061] Based on the above embodiments, in an optional embodiment of this utility model, the feeding assembly 6 includes a feeding channel 61, a screw 62 disposed within the feeding channel 61, and a driving component 63 for driving the screw 62 to rotate. The feeding channel 61 is arranged perpendicular to the discharge direction of the feeding hopper, with its inlet 611 connected to the feeding hopper and its outlet 612 connected to the mixing hopper 41. For example, a first screw is disposed in the first feeding channel connecting the first feeding hopper 31 and the mixing hopper 41, and a second screw is disposed in the second feeding channel connecting the second feeding hopper 32 and the mixing hopper 41. The driving component 63 is preferably a motor, electrically connected to a control component 5. The control component 5 drives the first motor to rotate the first screw at a first speed, and the second motor to rotate the second screw at a second speed. The first speed and the second speed may be the same or different. Through the friction of the spiral blades 621 on the screw 62 against the material, the material moves axially along the screw 62, thereby achieving quantitative mixing of secondary and virgin materials. The mixing ratio can be determined experimentally based on the amount of material ejected by the screw 62 at different speeds, and is not limited to this. In other embodiments, three or more feed hoppers can be provided to hold multiple materials and achieve mixing of multiple materials, without specific limitations.

[0062] In a preferred embodiment, the mixing chamber 41 is located below each feeding chamber. The feeding channel 61 is arranged perpendicular to the discharge direction of the feeding chamber, with its inlet 611 connected to the feeding chamber and its outlet 612 connected to the mixing chamber 41. The perpendicular arrangement of the feeding channel 61 to the discharge direction of the feeding chamber reduces the space occupied by the structure, shrinks the device size, and makes the overall device more compact. One end of the screw 62 is coupled to a motor for synchronous rotation, while the other end is fixed to the feeding channel 61 via a bearing. During mixing, material falls from the feeding chamber into the inlet 611 of the feeding channel 61, located at the starting end of the screw 62. As the screw 62 rotates, the helical blades 621 push the material to the tail end of the screw 62 and it falls into the mixing chamber 41 from the outlet 612. In one embodiment, the feeding channel 61 is integrally formed with the mixing chamber 41 and located on one side of the mixing chamber 41. A first boss 613 extends outward along the outer wall of the feeding channel 61, and a first mounting hole is provided on the first boss 613. Each feeding chamber is also integrally formed, and a second boss 33 extends outward from the outer wall of the feeding chamber. The second boss 33 is provided with a second mounting hole corresponding to the first mounting hole. During installation, the first mounting hole and the second mounting hole are aligned and fixed by bolts and nuts to fix the feeding chamber to the feeding channel 61. During disassembly, first loosen the nut, remove the bolt, and then hold the handle 34 located on the side of the feeding chamber to pull the feeding chamber out horizontally to remove it from the frame 1 without affecting other parts, making disassembly and assembly convenient.

[0063] In another embodiment, the cross-section of each feed hopper decreases from the feed end to the discharge end, and each feed hopper is equipped with a rotary paddle level switch 35 electrically connected to the control component 5 to control the amount of material in the feed hopper. The cross-section of each feed hopper decreases from top to bottom so that the material gathers at the discharge port 411 at the bottom under gravity. The feed hopper is preferably funnel-shaped. In one embodiment, the funnel, with its four sides inclined from the feed direction to the discharge direction, is divided into two feed hoppers. The first feed hopper 31 communicates with the crushing chamber 21, and the second feed hopper 32 has an openable door 321 at its top opening. New material can be poured in directly by opening the door 321, or it can be connected to an automatic new material feeding mechanism; no specific limitation is made. The rotary paddle level switch 35 includes a pressure sensor and a rotating vane 351. When the pressure sensor detects that the rotational pressure of the vane 351 reaches the set pressure range, it transmits a signal to the control unit 5. The display screen of the control unit 5 shows that the material is full, and the hopper 7 stops sucking in waste material to prevent the feed hopper from overflowing. Preferably, the height of the rotary paddle level switch 35 can be different in different feed hoppers to match the amount of material in the feed hopper with the feeding ratio, preventing excessive material from remaining in the feed hopper after the mixing operation is completed.

[0064] Based on the above embodiments, in an optional embodiment of the present invention, referring to... Figure 16 and Figure 17 The mixing assembly includes a mixing shaft 42 and multiple mixing blades 43 mounted or formed on the mixing shaft 42. Each mixing blade 43 has a hollowed-out center 431 to reduce resistance during mixing. The tail 432 of each mixing blade 43 is bent in the direction of rotation to scoop up material during rotation, thus accelerating mixing. The drive unit 44 of the mixing shaft 42 is preferably a motor or electric motor. This drive unit 44 is electrically connected to a control unit 5, and the rotation speed is set by the control unit 5 to ensure uniform mixing.

[0065] It should be noted that in this embodiment, each feeding hopper and mixing hopper 41 is provided with a feeding channel 61. The control unit 5 drives each drive component 63 to drive the corresponding screw 62 to rotate at a preset speed, thereby regulating the feeding speed of each feeding hopper and achieving quantitative mixing. By setting the speed through the control unit 5, the mixing ratio is precisely controlled, eliminating the need for manual mixing, ensuring mixing efficiency, and avoiding material waste caused by spillage or incorrect mixing ratios during the mixing process. At the same time, the control unit 5 drives the driver 44 to rotate the stirring assembly, making the stirring time and speed controllable, ensuring that the secondary material and new material entering the mixing hopper 41 are mixed evenly.

[0066] In other embodiments, both the mixing chamber 41 and the feeding channel 61 are equipped with openable and closable covers on their bottom surfaces, allowing for the exposure of cleaning ports on the bottom surfaces by pulling out the covers. For example, the mixing chamber 41 has a first cover 81 on its bottom surface, and the feeding channel 61 has a second cover 82 on its bottom surface. Operators can sequentially pull out the second cover 82 and the first cover 81 before or after mixing to clean any remaining material from the feeding channel 61 and the mixing chamber 41. The cleaning ports facilitate cleaning or washing of the equipment by operators and ensure that there is no material residue in the feeding channel 61 and the mixing chamber 41, thus ensuring the accuracy of the material mixing ratio.

[0067] Preferably, the cover plate is L-shaped, with a guide groove along the outer periphery of the discharge port. The cover plate is inserted into and limited within the guide groove. The guide groove is a straight groove, with one end of the L-shape serving as an insertion end and the other end as a handheld end. During installation, the operator inserts the insertion end along the guide groove using the handheld end, ensuring that the handheld end abuts against the upper limit of the guide groove's outer wall. Preferably, the handheld end protrudes from the outer wall of the guide groove to facilitate the pull-out of the cover plate.

[0068] Furthermore, the first feed hopper 31 is provided with a discharge port 311 near the discharge point, and a detachable cover is provided at the outlet 612 end of the discharge port 311. For example, a discharge pipe 312 extends downward along the periphery of the discharge port 311. The discharge pipe 312 is threaded, and the cover is connected to the discharge pipe 312 via the thread. Thus, in the event of a malfunction or other problem requiring rapid discharge, the cover can be opened to quickly release the secondary material in the feed hopper. In other embodiments, a discharge port 311 may also be provided in each feed hopper, and this is not limited to this specific embodiment.

[0069] Based on the above embodiments, in an optional embodiment of this utility model, the mixing chamber 41 is provided with at least one discharge port 411, which is connected to the first channel of the four-way connector 9. The four-way connector 9 also includes a second channel, a third channel, and a fourth channel. The second channel is positioned opposite the first channel and is equipped with a cylinder A1. The cylinder A1 is moved by the control component 5 to control the opening and closing of the discharge port 411. The third channel is positioned opposite to the fourth channel and adjacent to the first channel. The third channel is used to connect to the discharge pipe B1, and the fourth channel is equipped with a filter C1 and a blower. The blower cleans the dust inside the discharge pipe B1. For example, the mixing chamber 41 has a U-shaped cross-section, with discharge ports 411 on both sides for connection to the injection molding machine. The bottom radius of the U-shape is close to the rotation radius of the stirring blade 43, so that the stirring blade 43 can fit as close as possible to the inner wall of the mixing chamber 41 when rotating, reducing dead zones and ensuring that the materials in the mixing chamber 41 are fully mixed. The mixing chamber 41 has discharge ports 411 on both sides to supply material to two injection molding machines, thus accelerating production efficiency. The four-way connector 9 is cubical, with each channel located on one side of the cube. A plug A11 is fitted onto the piston shaft of cylinder A1. When the plug A11 extends into the discharge port 411, the discharge port 411 is sealed and closed. When the plug A11 retracts away from the discharge port 411 with the piston shaft, the discharge port 411 connects with the discharge pipe B1, and the material is sucked into the injection molding machine through a negative pressure mechanism. Filter C1 is positioned on the opposite side of discharge port 411. The blowing component can be a fan, and the air blown by the fan passes through filter C1 and is directed towards discharge pipe B1. In a preferred embodiment, when discharge port 411 is closed, the fan is activated to remove or clean the dust inside discharge pipe B1. The cylinder A1 can be extended to block discharge port 411 before feeding material to the injection molding machine, or the discharge port 411 can be blocked after the injection molding operation is completed to clean the dust. In another embodiment, a cyclone separator D1 is also included. This cyclone separator D1 is connected to discharge pipe B1 to separate and collect dust from discharge pipe B1, further reducing dust pollution to the environment during waste recycling. It should be noted that the working principle and structure of cyclone separator D1 are existing technology and will not be described in detail here.

[0070] In another embodiment, the discharge pipe B1 is connected to the injection molding machine. A switching valve E1, electrically connected to the control unit 5, detects the remaining material in the injection molding machine to control the start and stop of the feeding assembly 6. For example, the switching valve E1 may include a solenoid valve and a sensor. The control unit 5 sets the time for the switching valve E1 to detect the remaining material in the injection molding machine. If the switching valve E1 detects that there is still remaining material in the injection molding machine within the set time, the corresponding control unit 5 drives the screw 62 to stop rotating, thereby preventing excessive material in the injection molding machine from causing blockages or other malfunctions. This is not limited to this embodiment.

[0071] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A metal powder injection molding waste recycling machine, characterized in that, The device includes a frame and a crushing mechanism, a feeding mechanism, a mixing mechanism, and a control unit mounted on the frame. The crushing mechanism includes a crushing chamber and a crushing roller disposed within the crushing chamber. The feeding mechanism includes a first feeding bin communicating with the crushing chamber and a second feeding bin for holding new material. The mixing mechanism includes a mixing bin and a stirring assembly disposed within the mixing bin. A feeding assembly is provided between each of the two feeding bins and the mixing bin. By triggering the control unit, the hopper is driven to suck waste material into the crushing chamber and crush it into secondary material, which falls into the first feeding bin. Simultaneously, the two feeding assemblies are directed to adjust the ratio of secondary material to new material entering the mixing bin, and the stirring assembly is driven to uniformly mix the materials.

2. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, Multiple rings of crushing teeth are arranged along the outer periphery of the crushing roller, wherein at least one ring of crushing teeth has higher teeth than the other rings of crushing teeth. Jaw plates are formed or installed on the side walls of the crushing chamber, and the waste material is crushed by the cooperation of the crushing teeth with the grooves on the jaw plates.

3. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, The cross-section of each feed hopper decreases from the feed end to the discharge end, and each feed hopper is equipped with a rotary paddle level switch electrically connected to the control component to control the amount of material in the feed hopper.

4. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, The feeding assembly includes a feeding channel, a screw disposed in the feeding channel, and a driving component for driving the screw to rotate; wherein the feeding channel is arranged perpendicular to the discharge direction of the feed hopper, its inlet is connected to the feed hopper, and its outlet is connected to the mixing hopper.

5. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, The mixing chamber is provided with at least one discharge port, which is connected to the first channel of the four-way connector. The four-way connector also includes a second channel, a third channel, and a fourth channel. The second channel is positioned opposite the first channel and is equipped with a cylinder. The cylinder is moved by the control component to control the opening and closing of the discharge port. The third channel is positioned opposite the fourth channel and adjacent to the first channel. The third channel is used to connect to the discharge pipe. The fourth channel is equipped with a filter and a blower. The blower is used to clean the dust in the discharge pipe.

6. The metal powder injection molding waste recycling machine according to claim 5, characterized in that, The discharge pipe is connected to the injection molding machine. The remaining material in the injection molding machine is detected by a switching valve that is electrically connected to the control component, so as to control the start and stop of the feeding assembly.

7. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, The stirring assembly includes a stirring shaft and multiple stirring blades mounted or formed on the stirring shaft, wherein each stirring blade has a hollow center and a tail bent in the direction of rotation.

8. The metal powder injection molding waste recycling machine according to claim 4, characterized in that, Both the mixing chamber and the feeding channel are equipped with openable and closable covers on their bottom surfaces. The cleaning port on the bottom surface can be exposed by pulling out the cover.

9. The metal powder injection molding waste recycling machine according to claim 1, characterized in that, The first feed hopper is provided with a discharge port near the discharge position, and the outlet end of the discharge port is equipped with a detachable cover.

10. The metal powder injection molding waste recycling machine according to any one of claims 1-9, characterized in that, It also includes a cyclone separator, used to separate and collect dust from inside the recycling machine.

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