Injection molding machine feed apparatus

Abstract

The application relates to the injection molding technical field, and particularly discloses an injection molding machine feeding device, which comprises a stock bin, a screw feeder and a screw extruder. The stock bin comprises a feeding part, a metal adsorption part and a discharging part. A rotary valve for isolating or connecting the feeding part and the metal adsorption part is arranged between the feeding part and the metal adsorption part. A rotating magnetic disc for adsorbing magnetic metal particles is arranged between the metal adsorption part and the discharging part, and a plurality of sieve holes for particle falling are arranged on the surface of the rotating magnetic disc. The screw feeder is connected with the screw extruder and used for conveying the screened particles in the discharging part to the screw extruder. A heating part for melting the particles is arranged on the outer part of the screw extruder, and a die head for feeding the material to the injection molding machine is arranged at the tail end of the screw extruder. The injection molding machine feeding device can ensure that the material sent by the screw feeder to the screw extruder and extruded after being heated does not contain magnetic metal particles, the injection molding quality of the injection molding machine is ensured, and the injection molding machine feeding device has high practicability.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and specifically discloses an injection molding machine feeding device. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection presses, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. An injection molding machine typically consists of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, and a safety monitoring system. The injection system is one of the most important components of the injection molding machine. Its function is to heat and plasticize a certain amount of plastic within a specified time during one cycle of the injection molding machine, and then inject the molten plastic into the mold cavity through a screw under certain pressure and speed. However, existing injection molding systems have difficulty adsorbing ferromagnetic metal particles, and if these metal particles are not treated in time, they will affect the quality of the plastic product, and long-term operation may also cause damage to the extruder.

[0003] To address the aforementioned problems, this application discloses a feeding device for an injection molding machine. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model discloses a feeding device for an injection molding machine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a feeding device for an injection molding machine, including a hopper, a screw feeder, and a screw extruder. The hopper includes a feeding section, a metal adsorption section, and a discharging section. A rotary valve is provided between the feeding section and the metal adsorption section to isolate or connect the feeding section and the metal adsorption section. A rotating disk is provided between the metal adsorption section and the discharging section to adsorb magnetic metal particles. The surface of the rotating disk is provided with a plurality of sieve holes for the particles to fall.

[0006] The screw feeder connects the feeding section to the screw extruder to transport the screened particles in the feeding section to the screw extruder;

[0007] The screw extruder is externally fitted with a heating element for melting particles, and the end of the screw extruder is provided with a die for supplying material to an injection molding machine.

[0008] More preferably, both the feeding section and the metal adsorption section are cylindrical structures and are detachable, and the unloading section is a conical structure and is integrally formed with the metal adsorption section.

[0009] More preferably, the rotary valve includes a door panel connected to the lower part of the feeding section via a shaft and a reduction motor located outside the feeding section and connected to the shaft.

[0010] More preferably, the lower interior of the metal adsorption section is provided with an annular step, and the rotating disk includes an annular guide rail disposed below the annular step, a plastic disc rotatably disposed on the annular guide rail, a powerful magnet detachably fixed below the plastic disc, an annular plastic rack disposed around the plastic disc, a clearance groove formed on the lower side wall of the metal adsorption section, a sealing box disposed outside the metal adsorption section corresponding to the clearance groove, a power motor disposed at the bottom of the sealing box, a plastic gear mounted on the output shaft of the power motor inside the sealing box and extending into the metal adsorption section to mesh with the annular gear, and several sieve holes correspondingly formed to pass through the plastic disc and the powerful magnet.

[0011] More preferably, the top of the plastic disc is provided with an external threaded post, and the interior of the powerful magnet is provided with an internal threaded hole. When the plastic disc and the powerful magnet are fixed together, the external threaded post is screwed into the internal threaded hole.

[0012] More preferably, the heating element includes multiple electrically driven infrared heating coils.

[0013] More preferably, the inner cavity of the screw extruder gradually narrows towards its conveying end, and the blades of the screw extruder correspondingly gradually narrow towards the conveying end.

[0014] This utility model achieves the following beneficial effects:

[0015] The hopper designed in this application can realize feeding, magnetic adsorption of magnetic metal particles, and unloading operations. It can ensure that the material fed by the screw feeder to the screw extruder for heating and extrusion does not contain magnetic metal particles, thus ensuring the injection molding quality of the injection molding machine and having high practicality.

[0016] Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the specification, serve to explain the principles of the disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure disclosed in this utility model;

[0019] Figure 2This is a schematic diagram of the silo structure disclosed in this utility model;

[0020] Figure 3 This is a schematic diagram of the rotating disk structure disclosed in this utility model;

[0021] In the diagram: 10. Hopper; 11. Feeding section; 111. Rotary valve; 1111. Shaft; 1112. Door panel; 1113. Gear motor; 12. Metal adsorption section; 121. Rotating disk; 1211. Annular step; 1212. Annular guide rail; 1213. Plastic disc; 12131. Externally threaded post; 1214. Strong magnet; 12141. Internally threaded hole; 1215. Annular plastic rack; 1216. Sealing box; 1217. Power motor; 1218. Plastic gear; 122. Clearance groove; 13. Discharge section; 20. Screw feeder;

[0022] 30. Screw extruder; 31. Heating unit; 311. Electric infrared heating coil; 32. Die head;

[0023] d. Sieve aperture. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Example

[0027] To address the challenge that existing injection molding machine extrusion systems struggle to adsorb ferromagnetic metal particles—particles that, if not promptly removed, negatively impact plastic production quality and may cause extruder damage over time—this paper refers to… Figures 1-2As shown, in some embodiments, this application discloses an injection molding machine feeding device, including a hopper 10, a screw feeder 20 and a screw extruder 30. The hopper 10 includes a feeding section 11, a metal adsorption section 12 and a discharging section 13. A rotary valve 111 is provided between the feeding section 11 and the metal adsorption section 12 for isolating or connecting the feeding section 11 and the metal adsorption section 12. A rotating disk 121 for adsorbing magnetic metal particles is provided between the metal adsorption section 12 and the discharging section 13, and the surface of the rotating disk 121 is provided with a plurality of sieve holes d for particle falling.

[0028] The screw feeder 20 connects the feeding section 13 to the screw extruder 30 to transport the screened particles in the feeding section 13 to the screw extruder 30.

[0029] The screw extruder 30 is externally fixedly fitted with a heating part 31 for melting particles, and the end of the screw extruder 30 is provided with a die head 32 for supplying material to an injection molding machine.

[0030] Based on the above structure, the operator first pours the set amount of particles into the feeding section 11, and then controls the rotary valve 111 to open so that the particles are poured into the metal adsorption section 12. At this time, the rotating disk 121 starts to rotate. During this process, the magnetic metal particles will be adsorbed by the rotating disk 121 and the particles will flow through the screen holes d into the screw feeder 20. Under the conveying of the screw feeder 20, the particles will be sent to the screw extruder 30 and heated by the heating section 31 before being extruded by the die head 32.

[0031] Specifically, the feeding section 11 and the metal adsorption section 12 of this application are both cylindrical structures and can be detached, while the unloading section 13 is a conical structure and is integrally provided with the metal adsorption section 12.

[0032] As for the assembly and disassembly of the feeding part 11 and the metal adsorption part 12, in some exemplary embodiments, the structure of the feeding part 11 and the metal adsorption part 12 can be designed; for example, an insertion step is opened on the outer surface of the metal adsorption part 12 and the lower part of the feeding part 11 is inserted into the insertion step (not shown in this application).

[0033] In one specific embodiment, the rotary valve 111 of this application includes a door plate 1112 connected to the lower part of the feeding section 11 via a shaft 1111 and a geared motor 1113 located outside the feeding section 11 and connected to the shaft 1111. When the operator pours a set amount of particles into the coating, the geared motor 1113 drives the door plate 1112 to rotate via the shaft 1111. During this process, the door plate 1112 will switch from a horizontal state to a horizontal state, so that the particles will be poured into the metal adsorption section 12.

[0034] In one specific embodiment, the metal adsorption part 12 of this application has an annular step 1211 at its lower interior. The rotating disk 121 includes an annular guide rail 1212 disposed below the annular step 1211, a plastic disk 1213 rotatably disposed on the annular guide rail 1212, a strong magnet 1214 detachably fixed below the plastic disk 1213, an annular plastic rack 1215 disposed around the plastic disk 1213, a clearance groove 122 formed on the lower side wall of the metal adsorption part 12, a sealing box 1216 disposed outside the metal adsorption part 12 corresponding to the clearance groove 122, and a power motor 1217 disposed at the bottom of the sealing box 1216. Inside the sealing box 1216, a plastic gear 1218 is installed on the output shaft of the power motor 1217 and extends into the metal adsorption section 12, meshing with a ring gear. Several sieve holes d are correspondingly opened, passing through the plastic disc 1213 and the strong magnet 1214. When the material in the feeding section 11 is poured into the metal adsorption section 12, the power motor 1217 will drive the plastic gear 1218 to rotate. During this process, the plastic gear 1218 and the ring plastic rack 1215 cooperate to drive the plastic disc 1213 to rotate. In this way, the particles located in the metal adsorption section 12 will be thrown into the feeding section 13 through the sieve holes d, while the magnetic metal particles will be adsorbed by the strong magnet 1214.

[0035] refer to Figure 3 As shown, in order to facilitate the disassembly and assembly of the powerful magnet 1214 and the plastic disc, this application provides an external threaded post 12131 on the top of the plastic disc 1213, and an internal threaded hole 12141 inside the powerful magnet 1214. When the plastic disc 1213 and the powerful magnet 1214 are fixed together, the external threaded post 12131 is screwed into the internal threaded hole 12141. When cleaning the magnetic metal particles on the powerful magnet 1214, the powerful magnet 1214 needs to be removed from the plastic disc 1213.

[0036] In one specific embodiment, the heating section 31 of this application includes a plurality of electric infrared heating coils 311. When the screw extruder 30 is working, the plurality of electric infrared heating coils 311 start to heat the screw extruder 30, so that the particles located in the screw extruder 30 will be melted and extruded from the die head 32 to the injection mold.

[0037] In order to enable the screw extruder 30 to extrude molten plastic better, this application makes the inner cavity of the screw extruder 30 gradually narrow towards its conveying end, and the blades of the screw extruder 30 correspondingly gradually narrow towards the conveying end. That is to say, the pressure of the screw extruder 30 is greater towards the rear, and the extruded molten material is more uniform.

[0038] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A feeding device for an injection molding machine, comprising a hopper (10), a screw feeder (20), and a screw extruder (30), characterized in that, The hopper (10) includes a feeding section (11), a metal adsorption section (12), and a discharging section (13). A rotary valve (111) is provided between the feeding section (11) and the metal adsorption section (12) to isolate or connect the feeding section (11) and the metal adsorption section (12). A rotating disk (121) is provided between the metal adsorption section (12) and the discharging section (13) to adsorb magnetic metal particles. The surface of the rotating disk (121) is provided with a plurality of sieve holes (d) for the particles to fall. The screw feeder (20) connects the feeding section (13) to the screw extruder (30) to transport the screened particles in the feeding section (13) to the screw extruder (30); The screw extruder (30) is externally fitted with a heating part (31) for melting particles, and the end of the screw extruder (30) is provided with a die head (32) for supplying material to an injection molding machine.

2. The injection molding machine feeding device according to claim 1, characterized in that, The feeding section (11) and the metal adsorption section (12) are both cylindrical structures and can be detached. The unloading section (13) is a conical structure and is integrally formed with the metal adsorption section (12).

3. The injection molding machine feeding device according to claim 1, characterized in that, The rotary valve (111) includes a door panel (1112) connected to the lower part of the feeding section (11) via a shaft (1111) and a geared motor (1113) located outside the feeding section (11) and connected to the shaft (1111).

4. The injection molding machine feeding device according to claim 1, characterized in that, The metal adsorption part (12) has an annular step (1211) at its lower interior. The rotating disk (121) includes an annular guide rail (1212) located below the annular step (1211), a plastic disk (1213) rotatably mounted on the annular guide rail (1212), a powerful magnet (1214) detachably fixed below the plastic disk (1213), an annular plastic rack (1215) located around the plastic disk (1213), and a ring-shaped plastic toothed rack (1215) located below the metal adsorption part (12). The wall has a clearance groove (122), a sealing box (1216) corresponding to the clearance groove (122) is provided outside the metal adsorption part (12), a power motor (1217) is provided at the bottom of the sealing box (1216), a plastic gear (1218) is installed in the sealing box (1216) on the output shaft of the power motor (1217) and extends into the metal adsorption part (12) to mesh with the ring gear, and several sieve holes (d) are correspondingly opened to pass through the plastic disc (1213) and the strong magnet (1214).

5. The injection molding machine feeding device according to claim 4, characterized in that, The top of the plastic disc (1213) is provided with an external threaded post (12131), and the inside of the powerful magnet (1214) is provided with an internal threaded hole (12141). When the plastic disc (1213) and the powerful magnet (1214) are fixed together, the external threaded post (12131) is screwed into the internal threaded hole (12141).

6. The injection molding machine feeding device according to claim 1, characterized in that, The heating element (31) includes a plurality of electrically operated infrared heating coils (311).

7. The injection molding machine feeding device according to claim 1, characterized in that, The inner cavity of the screw extruder (30) gradually narrows toward its conveying end, and the blades of the screw extruder (30) correspondingly gradually narrow toward the conveying end.

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