Metal piece hard rubber coating injection molding device with step-by-step type automatic feeding and discharging structure

Abstract

The utility model discloses a metal piece hard rubber coating injection molding device with a step-by-step automatic feeding and discharging structure, which comprises an injection molding machine with a turntable, a welding mold, a feeding mechanism, a first grabbing mechanism, a transfer mechanism and a second grabbing mechanism, automatic feeding of metal pieces, discharging of injection molding pieces (including transferring of welding fort molds filled with the metal pieces and the injection molding pieces) and injection molding machining can be conducted synchronously, automatic discharging of the metal pieces is achieved, the trouble of existing manual discharging is avoided, the multiple metal pieces can be fed at the same time, the machining efficiency is improved, and meanwhile the machining cost is reduced. And the situation that the placement position of the metal piece on the lower mold is not accurate easily in the process that the metal piece in the jig is directly grabbed and transferred to the lower mold by a plurality of existing clamping assemblies is avoided, so that the influence on subsequent injection molding machining is prevented, and the situation that the mold is possibly damaged due to the fact that the existing metal piece falls on the lower mold is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding devices, in particular to a metal part hard-coated plastic injection molding device with a step-by-step automatic loading and unloading structure. Background Art

[0002] Spatulas and spoons are also common household utensils, including a handle and a spade body (spoon body). There are two types of spatulas (spoon). One is an integrated type. To prevent people from burning their hands, a layer of wood or rubber needs to be wrapped around the handle. The other is an assembled type, such as Figure 5 and Figure 6 As shown, it includes a shovel body, a metal part and a handle injection molding part, and the metal part is used to connect the shovel body (spoon body) and the handle injection molding part.

[0003] At present, injection molding parts of handles are usually produced by injection molding machines. During the production and loading process, in order to prevent the danger of manual loading directly into the lower mold, several metal parts are usually manually placed one by one into a jig similar to the lower mold (the jig is provided with holes for accommodating metal parts), and then a robot is used to drive the clamping assembly to grab the several metal parts and place them in the lower mold of the injection molding machine for injection molding.

[0004] Manual placement of metal parts is inefficient, and due to the small size of metal parts, they are compactly arranged on the jig and the lower mold. Therefore, when multiple clamping components grab the metal parts in the jig and transfer them to the lower mold, it is easy for the placement on the lower mold to be inaccurate, thus affecting the subsequent injection molding process. Metal parts falling on the lower mold may cause damage to the mold, and the efficiency of a single clamping component when clamping and taking materials from the jig will be reduced, thereby reducing the processing efficiency. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art that manual placement of metal parts is inefficient, multiple clamping components are prone to inaccurate placement on the lower mold during the process of grabbing and transferring the metal parts in the jig to the lower mold, and a single clamping component has reduced efficiency when clamping and taking materials from the jig, the utility model provides a metal part hard plastic injection molding device with a step-by-step automatic loading and unloading structure.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure, comprising:

[0007] An injection molding machine, used for forming an injection molded part by injection molding a hard plastic on a metal part, comprising an upper mold, a lower mold and a turntable, a processing area and a waiting area are arranged above the turntable, the processing area is located directly below the upper mold, the processing area and the waiting area are both provided with a lower mold, the lower mold comprises a base and a welding bastion mold arranged on the base, a plurality of second positioning holes are opened on the welding bastion mold, and the length of the metal part is greater than the depth of the second positioning holes;

[0008] The feeding mechanism comprises a vibrating material tray, a material receiving platform and a first driving member, wherein the material guide plate is connected to the material discharge end of the vibrating material tray, the material guide plate is provided with a material guide channel perpendicular to the top surface of the material receiving platform, the bottom surface of the material guide plate is in contact with the top surface of the material receiving platform, the top surface of the material receiving platform is provided with a first positioning hole for placing a metal piece, the output end of the first driving member is fixedly connected to the material receiving platform, the length of the metal piece is greater than the depth of the first positioning hole, a clearance groove connected to the material guide channel is provided on one side of the outer wall of the material guide plate, the length of the clearance groove is less than the length of the metal piece, and is not less than the length of the metal piece protruding from the top surface of the material receiving platform;

[0009] The transfer mechanism comprises at least two first support plates, each of which is provided with a welding bastion mold;

[0010] The first material grabbing mechanism is used to grab the metal piece in the first positioning hole on the material receiving platform and place it in the second positioning hole of the welding bastion mold;

[0011] The second material grabbing mechanism comprises a second manipulator, a loading assembly, a unloading assembly and a picking assembly, wherein the output end of the second manipulator is fixedly connected to a second support plate, and the second support plate is provided with a loading assembly, a unloading assembly and a picking assembly;

[0012] Among them, the second manipulator drives the loading component to transfer the weld burglar mold with metal parts placed on the first support plate to the base in the waiting area on the turntable, the second manipulator drives the unloading component to transfer the weld burglar mold that enters the waiting area after being processed on the turntable to form an injection molded part to the first support plate, and the second manipulator drives the picking component to unload the injection molded part on the weld burglar mold transferred to the first support plate.

[0013] Preferably, the loading assembly and the unloading assembly both include vertical plates and electromagnets, two vertical plates are fixedly mounted on the second support plate, a plurality of electromagnets are arranged on the vertical plates, and the welding bastion mold is made of iron material.

[0014] Preferably, the transfer mechanism comprises a support platform, on which two electric slide rails are arranged, and on each of the electric slide rails a first support plate is slidably arranged.

[0015] Preferably, a first fixing component is provided on the first support plate to fix the welding burgee mold, and the first fixing component includes a second driving member, a pressure plate and a back plate. The top surface of the first support plate is fixedly installed with the back plate and the second driving member, and the output end of the second driving member is fixedly connected to the pressure plate.

[0016] Preferably, the lower mold also includes a second fixing assembly for fixing the welding bastion mold on the base.

[0017] Preferably, a leveling assembly is fixedly installed on the second support plate, and the leveling assembly is located on one side of the feeding assembly. The leveling assembly includes a third driving member and a cross plate. The output end of the third driving member is fixedly connected to the cross plate, and the third driving member drives the cross plate to move downward to level the metal parts on the welding burg mold.

[0018] Preferably, the first material grabbing mechanism includes a first manipulator and a clamping assembly, the first manipulator is a four-axis manipulator, the second manipulator is a six-axis manipulator, and the clamping assembly and the material picking assembly are both pneumatic grippers.

[0019] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0020] The utility model is provided with an injection molding machine with a turntable, a welding bastion mold, a feeding mechanism, a first grasping mechanism, a transfer mechanism and a second grasping mechanism, so that automatic loading of metal parts, unloading of injection molded parts (including the transportation of the welding bastion mold filled with metal parts and injection molded parts) and injection molding processing can be carried out simultaneously, thereby realizing automatic unloading of metal parts and avoiding the trouble of existing manual unloading. It can realize the simultaneous loading of multiple metal parts to improve the processing efficiency and also avoid the situation in which the metal parts are easily placed in the lower mold in the process of directly grasping and transporting the metal parts in the fixture to the lower mold by the existing multiple clamping components, thereby preventing the subsequent injection molding processing from being affected and avoiding the existing metal parts falling on the lower mold and possibly causing damage to the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the feeding mechanism of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the transfer mechanism of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the second support plate, the loading assembly, the unloading assembly, the picking assembly, the leveling assembly and the welding bastion mold of the utility model;

[0025] Figure 5It is a schematic diagram of the structure of the metal part and the injection molded part of the utility model;

[0026] Figure 6 It is a schematic diagram of the assembled shovel structure;

[0027] Wherein: 1. injection molding machine; 2. feeding mechanism; 21. vibrating material tray; 22. material guide plate; 23. first driving member; 24. material receiving platform; 25. first positioning hole; 26. clearance groove; 3. first material grabbing mechanism; 4. transfer mechanism; 41. support platform; 42. electric slide rail; 43. first support plate; 44. abutment plate; 45. second driving member; 5. second material grabbing mechanism; 6. second support plate; 7. loading assembly; 8. unloading assembly; 81. vertical plate; 82. electromagnet; 9. material taking assembly; 10. leveling assembly; 101. third driving member; 102. horizontal plate; 11. welding burg mold; 12. turntable; 13. second fixed assembly. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0029] like Figure 1-Figure 6 As shown, the utility model provides a metal part hard plastic injection molding device with a step-by-step automatic loading and unloading structure, comprising an injection molding machine 1, a feeding mechanism 2, a welding bastion mold 11, a transfer mechanism 4, a first grabbing mechanism 3 and a second grabbing mechanism 5;

[0030] The injection molding machine 1 (which is an existing device and the specific principle will not be described here) is used to form an injection molded part by injection molding a hard glue on a metal part, and includes an upper mold, a lower mold and a turntable 12. A processing area and a waiting area are provided above the turntable 12 (here, one processing area and one waiting area are provided, so there are two bases, and they are directly arranged on the turntable 12. In order to show the subsequent second fixing component 13, the specific structure diagram of the base is not shown). The processing area is located directly below the upper mold. The processing area and the waiting area are both provided with a lower mold. The lower mold includes a base and a welding bastion mold 11 provided on the base. The welding bastion mold 11 is provided with a plurality of second positioning holes, and the length of the metal part is greater than the depth of the second positioning holes;

[0031] By setting the processing area and the waiting area, continuous and uninterrupted injection molding processing can be achieved, avoiding the waiting time when replacing the welding bastion mold 11 when there is only one processing area;

[0032] The feeding mechanism 2 includes a vibrating material tray 21, a material receiving platform 24 and a first driving member 23 (which can be set as a cylinder here). The material discharge end of the vibrating material tray 21 is connected to a material guide plate 22, and the material guide plate 22 is provided with a material guide channel perpendicular to the top surface of the material receiving platform 24. The bottom surface of the material guide plate 22 is in contact with the top surface of the material receiving platform 24. The top surface of the material receiving platform 24 is provided with a first positioning hole 25 for placing a metal piece. The output end of the first driving member 23 is fixedly connected to the material receiving platform 24. The length of the metal piece is greater than the depth (square) of the first positioning hole 25. In order to facilitate the subsequent first material grabbing mechanism 3 to grab the metal piece and place it in the second positioning hole of the welding bastion mold 11), a clearance groove 26 connected to the material guide channel is opened on one side of the outer wall of the material guide plate 22. The length of the clearance groove 26 is less than the length of the metal piece, and is not less than the length of the metal piece protruding from the top surface of the material receiving platform 24, ensuring that the metal piece will not be separated from the clearance groove 26 when it contacts the top surface of the material receiving platform 24, and the metal piece that enters the first positioning hole 25 from the material guide channel can be moved out of the clearance groove 26 later;

[0033] The transfer mechanism 4 includes at least two first support plates 43, and each first support plate 43 is provided with a welding bastion mold 11;

[0034] The first material grabbing mechanism 3 is used to grab the metal piece in the first positioning hole 25 on the material receiving platform 24 and place it in the second positioning hole of the welding bastion mold 11;

[0035] The second material grabbing mechanism 5 includes a second manipulator, a loading assembly 7, a unloading assembly 8 and a picking assembly 9. The output end of the second manipulator is fixedly connected to the second support plate 6. The second support plate 6 is provided with a loading assembly 7, a unloading assembly 8 and a picking assembly 9.

[0036] The second manipulator drives the loading assembly 7 to transfer the welding bastion mold 11 with the metal parts placed on the first support plate 43 to the base in the waiting area on the turntable 12;

[0037] The second manipulator drives the unloading assembly 8 to transfer the welding bastion mold 11 which has been processed on the turntable 12 to form an injection molded part and enters the waiting area to the first support plate 43;

[0038] The second manipulator drives the material taking component 9 to unload the injection molded parts transferred to the welding bastion mold 11 on the first support plate 43, so as to facilitate the automatic loading of metal parts through the first material grabbing mechanism 3 after the injection molded parts are unloaded;

[0039] Here, two first support plates 43 are used (by setting two first support plates 43, when the welding burg mold 11 on one first support plate 43 is loading the metal parts, the welding burg mold 11 filled with metal parts on the other first support plate 43 can be taken away synchronously, and the placement of the welding burg mold 11 filled with injection molded parts is convenient, and the two work synchronously and alternately, thereby improving the processing efficiency), and four second positioning holes are opened on the welding burg mold 11 as an example for explanation:

[0040] When using, Figure 1 and Figure 2 , the metal pieces are introduced into the material guide channel of the material guide plate 22 one by one by vibrating the material tray 21. At this time, the lowest metal piece is in contact with the top surface of the material receiving platform 24. The first driving member 23 is adjusted to drive the material receiving platform 24 to move until the first positioning hole 25 is located directly below the metal piece. At this time, the metal piece will fall into the first positioning hole 25, and then the first driving member 23 is adjusted to drive the material receiving platform 24 to move to the original position (such as Figure 2 As shown), the single feeding of metal parts is completed, ensuring the accurate feeding of each metal part;

[0041] Afterwards Figure 1 and Figure 3 As shown, by adjusting the first material grabbing mechanism 3 (including the first manipulator and the clamping assembly, which is the prior art and will not be described in detail here), the metal parts in the first positioning hole 25 are taken out one by one and transported to the second positioning hole on the welding bastion mold 11 on the first support plate 43;

[0042] Then as Figure 1 and Figure 4 As shown, by adjusting the second manipulator to drive the second support plate 6 to move, thereby driving the loading assembly 7 to move, so that the loading assembly 7 grabs the welding burg mold 11 filled with metal parts on the first support plate 43 and transfers it to the base in the waiting area on the turntable 12 to form a complete lower mold (at the same time, the first grabbing mechanism 3 continues to grab the metal parts and place them in the second positioning hole on the welding burg mold 11 on another first support plate 43, so as to realize the continuous and uninterrupted automatic loading of metal parts), and then the turntable 12 is driven to rotate (it can be driven by a motor, the specific structure is not shown, it is the prior art), so that the lower mold in the waiting area is rotated to the processing area, and then the injection molding work is completed by the injection molding machine 1;

[0043] It should be noted that before the weld burg mold 11 filled with metal parts on the first support plate 43 is grabbed and transported to the base in the waiting area on the turntable 12 to form a complete lower mold, when there is an injection molded part on the weld burg mold 11 on the base, it is necessary to first adjust the second manipulator to drive the second support plate 6 to move, thereby driving the blanking component 8 to move, so that the blanking component 8 first grabs the weld burg mold 11 with the injection molded part on the base in the waiting area, and then places the weld burg mold 11 filled with metal parts;

[0044] After the solder burg mold 11 with the injection molded parts on the base in the waiting area is first grabbed, the solder burg mold 11 with the injection molded parts is transferred to the first support plate 43 (such as the solder burg mold 11 filled with metal parts) just taken away by adjusting the second manipulator. Figure 3 shown);

[0045] Then, the second manipulator is adjusted again to drive the second support plate 6 to move, thereby driving the material taking component 9 to move, and the injection molded parts on the welding burg mold 11 are taken out by the material taking component 9 to complete the automatic unloading work, so as to facilitate the subsequent repeated loading of metal parts on the welding burg mold 11 by the first grabbing mechanism 3;

[0046] During the time period when the second grabbing mechanism 5 grabs the weld burg mold 11 filled with metal parts on a first support plate 43 and places it on the base in the waiting area, and the second grabbing mechanism 5 places the weld burg mold 11 filled with injection molded parts on the empty first support plate 43, and the second grabbing mechanism 5 takes away the injection molded parts on the weld burg mold 11, the first grabbing mechanism 3 grabs the metal parts one by one and places them in the first positioning holes 25 of the weld burg mold 11 on another first support plate 43, and the injection molding work is carried out synchronously at this time, so that the automatic loading of metal parts, the unloading of injection molded parts (including the transportation of the weld burg mold 11 filled with metal parts and injection molded parts) and the injection molding process can be carried out synchronously;

[0047] The feeding mechanism 2 realizes the automatic feeding of a single metal part, and then the first grabbing mechanism 3 is used to grab the metal parts one by one and place them on the soldering bastion mold 11, and then the second manipulator and the loading assembly 7 grab the soldering bastion mold 11 filled with metal parts and transfer it to the base in the waiting area to complete the step-by-step automatic feeding work, and the soldering bastion mold 11 with the injection molded parts is transferred to the first support plate 43, and then the injection molded parts on the first support plate 43 are taken away by the taking assembly 9, so as to complete the step-by-step automatic unloading work, and the automatic loading of metal parts and unloading of injection molded parts are completed. The welding bastion mold 11 (including the transfer of the welding bastion mold 11 filled with metal parts and filled with injection molded parts) and the injection molding process can be carried out simultaneously, realizing the automatic discharge of metal parts, avoiding the trouble of the existing manual discharge, and realizing the simultaneous loading of multiple metal parts to improve the processing efficiency. At the same time, it also avoids the situation that the metal parts are easily placed in the lower mold inaccurately during the process of the existing multiple clamping components directly grabbing and transferring the metal parts in the fixture to the lower mold, thereby preventing the subsequent injection molding process from being affected and avoiding the existing metal parts from falling on the lower mold and possibly causing damage to the mold.

[0048] like Figure 1 and Figure 4 As shown, both the loading assembly 7 and the unloading assembly 8 include a vertical plate 81 and an electromagnet 82. Two vertical plates 81 are fixedly mounted on the second support plate 6. A plurality of electromagnets 82 are arranged on the vertical plates 81 (the electromagnets 82 are existing structures, and the specific working principle is not repeated here). The welding bastion mold 11 is made of iron material;

[0049] The solder burg mold 11 can be fixed by the adsorption effect of the electromagnet 82, so that the solder burg mold 11 can be conveniently transferred by adjusting the second manipulator.

[0050] like Figure 1 and Figure 3 As shown, the transfer mechanism 4 includes a support platform 41, on which two electric slide rails 42 are provided, and on each electric slide rail 42 there is a first support plate 43 slidably provided;

[0051] By setting the electric slide rail 42, the welding bastion molds 11 on the two first support plates 43 can be placed in an interlaced position (such as Figure 4 As shown), it is ensured that when the first grasping mechanism 3 grasps the metal part and places it on the welding bastion mold 11, it will not interfere with the second grasping mechanism 5 in taking and placing the welding bastion mold 11.

[0052] like Figure 3 As shown, a first fixing assembly is provided on the first support plate 43 to fix the welding mold 11, and the first fixing assembly includes a second driving member 45 (which can be set as a cylinder here), a pressing plate and a resisting plate 44. The resisting plate 44 and the second driving member 45 are fixedly installed on the top surface of the first support plate 43, and the output end of the second driving member 45 is fixedly connected to the pressing plate;

[0053] After the weld burg mold 11 is placed on the first support plate 43, one side of it is fitted with the abutment plate 44. By adjusting the second driving member 45, it drives the pressure plate to move closer to the weld burg mold 11 until it abuts against the weld burg mold 11, thereby completing the fixation of the weld burg mold 11 and ensuring that the first supporting plate 43 is in a stable state when sliding on the electric slide rail 42. When the weld burg mold 11 needs to be removed later, adjust the second driving member 45 to drive the pressure plate to move away from the weld burg mold 11 so that it no longer presses and fixes the weld burg mold 11.

[0054] like Figure 1 As shown, the lower mold further includes a second fixing assembly 13, which is used to fix the welding bastion mold 11 on the base;

[0055] The second fixing component 13 here can be fixed by a cylinder-driven clamp (an existing fixing structure, which will not be repeated here), to ensure the stable placement of the weld burg mold 11 on the base, so that when the turntable 12 rotates, the weld burg mold 11 in the waiting area will not be displaced when it is transferred to the processing area, thereby ensuring the normal progress of subsequent injection molding work.

[0056] like Figure 4 As shown, a leveling assembly 10 is fixedly installed on the second support plate 6, and the leveling assembly 10 is located on one side of the feeding assembly 7. The leveling assembly 10 includes a third driving member 101 (which can be set as a cylinder here) and a horizontal plate 102. The output end of the third driving member 101 is fixedly connected to the horizontal plate 102, and the third driving member 101 drives the horizontal plate 102 to move downward to level the metal parts on the welding mold 11;

[0057] After the electromagnet 82 of the feeding assembly 7 adsorbs and fixes the weld burg mold 11 on the first support plate 43, the third driving component 101 is adjusted to drive the cross plate 102 to move downward, so that it can limit and squeeze the metal parts on each weld burg mold 11, to ensure that the metal parts will not move or even fall off during the process of the second manipulator driving the weld burg mold 11 to be transferred to the base in the waiting area, thereby ensuring the accurate and normal progress of the subsequent injection molding work. Before the weld burg mold 11 needs to be transferred to the base in the waiting area, the third driving component 101 is adjusted to drive the cross plate 102 to move upward, so that the cross plate 102 is no longer in contact with the metal parts.

[0058] like Figure 1As shown, the first material grabbing mechanism 3 includes a first manipulator and a clamping assembly, the first manipulator is a four-axis manipulator, and the second manipulator is a six-axis manipulator. Since the second manipulator needs to drive the loading assembly 7, the unloading assembly 8 and the picking assembly 9 to work respectively, a six-axis manipulator is used, and the first manipulator only needs to pick up the metal parts and place them on the welding bastion mold 11, so a four-axis manipulator can be used. Under the premise of not affecting the work, the equipment cost is reduced. The clamping assembly and the picking assembly 9 are both pneumatic clamps (this is an existing clamping structure, and the specific principle is not repeated);

[0059] Since four first positioning holes 25 are provided on the welding bastion mold 11, the material taking assembly 9 includes four pneumatic clamps.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure, characterized in that: include: An injection molding machine (1) is used for forming an injection molded part by injection molding a hard plastic coating on a metal part, comprising an upper mold, a lower mold and a turntable (12), wherein a processing area and a waiting area are arranged above the turntable (12), wherein the processing area is located directly below the upper mold, wherein the processing area and the waiting area are both provided with a lower mold, wherein the lower mold comprises a base and a welding bastion mold (11) arranged on the base, wherein a plurality of second positioning holes are opened on the welding bastion mold (11), and wherein the length of the metal part is greater than the depth of the second positioning holes; A feeding mechanism (2) comprises a vibrating material tray (21), a material receiving platform (24) and a first driving member (23); a material guide plate (22) is connected to the material discharge end of the vibrating material tray (21); the material guide plate (22) is provided with a material guide channel perpendicular to the top surface of the material receiving platform (24); the bottom surface of the material guide plate (22) is in contact with the top surface of the material receiving platform (24); a first positioning hole (25) for placing a metal piece is provided on the top surface of the material receiving platform (24); the output end of the first driving member (23) is fixedly connected to the material receiving platform (24); the length of the metal piece is greater than the depth of the first positioning hole (25); a clearance groove (26) connected to the material guide channel is provided on one side of the outer wall of the material guide plate (22); the length of the clearance groove (26) is less than the length of the metal piece and not less than the length of the metal piece protruding from the top surface of the material receiving platform (24); The transfer mechanism (4) comprises at least two first support plates (43), each of the first support plates (43) being provided with a welding bastion mold (11); A first material grabbing mechanism (3) is used to grab the metal part in the first positioning hole (25) on the material receiving platform (24) and place it in the second positioning hole of the welding bastion mold (11); A second material grabbing mechanism (5) comprises a second manipulator, a loading assembly (7), a unloading assembly (8) and a picking assembly (9), wherein the output end of the second manipulator is fixedly connected to a second support plate (6), and the second support plate (6) is provided with a loading assembly (7), a unloading assembly (8) and a picking assembly (9); The second manipulator drives the loading component (7) to transfer the weld bastion mold (11) with the metal parts placed on the first support plate (43) to the base in the waiting area on the turntable (12); the second manipulator drives the unloading component (8) to transfer the weld bastion mold (11) which has been processed on the turntable (12) to form an injection molded part and enters the waiting area to the first support plate (43); the second manipulator drives the picking component (9) to unload the injection molded part on the weld bastion mold (11) transferred to the first support plate (43).

2. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 1 is characterized in that: The loading assembly (7) and the unloading assembly (8) both comprise a vertical plate (81) and an electromagnet (82); two vertical plates (81) are fixedly mounted on the second support plate (6); a plurality of electromagnets (82) are arranged on the vertical plates (81); and the welding bastion mold (11) is made of iron material.

3. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 1 is characterized in that: The transfer mechanism (4) comprises a support platform (41), on which two electric slide rails (42) are arranged, and on each of the electric slide rails (42) a first support plate (43) is slidably arranged.

4. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 3 is characterized in that: The first support plate (43) is provided with a first fixing assembly for fixing the welding dam mold (11), the first fixing assembly comprising a second driving member (45), a pressing plate and a resisting plate (44), the resisting plate (44) and the second driving member (45) are fixedly installed on the top surface of the first support plate (43), and the output end of the second driving member (45) is fixedly connected to the pressing plate.

5. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 1 is characterized in that: The lower mold also includes a second fixing component (13) for fixing the welding bastion mold (11) on the base.

6. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 1 is characterized in that: A leveling assembly (10) is fixedly mounted on the second support plate (6), and the leveling assembly (10) is located on one side of the loading assembly (7). The leveling assembly (10) comprises a third driving member (101) and a transverse plate (102), and an output end of the third driving member (101) is fixedly connected to the transverse plate (102), and the third driving member (101) drives the transverse plate (102) to move downward to level the metal parts on the welding bastion mold (11).

7. The metal parts hard plastic injection molding device with a step-by-step automatic loading and unloading structure according to claim 1 is characterized in that: The first material grabbing mechanism (3) comprises a first manipulator and a clamping assembly, the first manipulator is a four-axis manipulator, the second manipulator is a six-axis manipulator, and the clamping assembly and the material picking assembly (9) are both pneumatic grippers.

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