A feeding device for injection molding mold

Abstract

This utility model belongs to the field of injection molding material feeding technology and discloses a material feeding device for injection molds, including an injection tube, a feeding box connected to the injection tube, a crushing box installed at the top of the feeding box, a crushing mechanism installed inside the crushing box, a protective frame fixed to the inner wall of the feeding box, and a filter screen movably connected thereto. This utility model utilizes the upward movement of the telescopic end of an electric push rod to move a baffle plate together, releasing the obstruction of the feeding pipe, further causing the connecting rod to pull the filter screen upwards. The electric push rod can reciprocate to control the baffle plate to move up and down, facilitating the swinging of the filter screen and allowing the plastic to slide downwards. This allows the plastic accumulated on the filter screen to slide into the feeding pipe and finally into the feeding cylinder. Then, the operation of the motor drives the auger conveyor rod to rotate, conveying the plastic falling into the feeding cylinder upwards. Finally, the plastic is poured back into the space between the two crushing rollers through the discharge pipe for crushing.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding material feeding technology, specifically a material feeding device for injection molds. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, 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. Before heating the plastic, a feeding device is needed to add the plastic to the injection molding machine.

[0003] A search revealed that patent CN222495168U discloses a feeding device for injection molds, including an injection motor, an injection tube fixedly connected to the front end of the injection motor, a feed inlet fixedly connected to the upper rear side of the injection tube, and a filter structure fixedly connected to the upper end of the feed inlet; a bracket, a crushing and processing barrel fixedly fitted inside the upper end of the bracket, and a mating interface fixedly connected to the lower end of the crushing and processing barrel, with snap-fit ​​buckles connecting the rotating shafts on both sides of the mating interface; the beneficial effects are: the feeding device for injection molds proposed in this utility model, by setting a filter structure, allows the plastic to be filtered after crushing, blocking the plastic that is not completely crushed, and at the same time, the filter screen can be easily disassembled to clean it in time, preventing blockage, thus improving injection efficiency and the quality of injection molded parts.

[0004] Analysis of the above technical solutions reveals that when a large amount of plastic particles accumulate on the filter screen, manual removal and cleaning are required. During this process, the injection molding tube has a certain temperature, posing a risk of burns to personnel operating at close range. Furthermore, frequent removal of the filter screen for cleaning the plastic and refilling it into the crushing cylinder not only increases the workload but also reduces the practicality of the feeding device. Therefore, we provide a feeding device for injection molds to solve these problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a feeding device for injection molds.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a feeding device for injection molds, comprising an injection tube, a feeding box connected to the injection tube, a crushing box installed at the top of the feeding box, a crushing mechanism provided inside the crushing box, a protective frame fixedly connected to the inner wall of the feeding box and a filter screen movably connected thereto, an electric push rod installed inside the protective frame, a baffle fixedly connected to the telescopic end of the electric push rod, and the baffle slidingly disposed on the inner wall of the feeding box, a connecting rod hinged to the top of the baffle, and the bottom end of the connecting rod hinged to the filter screen, and a lifting mechanism for conveying the plastic on the filter screen to the crushing box is provided on the left side of the feeding box.

[0007] Preferably, the crushing mechanism includes two crushing rollers, both of which are installed inside a crushing chamber. The inner wall of the crushing chamber is fixedly connected to two opposing guide seats, which are located above the two crushing rollers.

[0008] Preferably, the lifting mechanism includes a feeding cylinder, the top end of which is connected to a discharge pipe, and the bottom end of which is connected to a feed pipe. The discharge pipe extends into the crushing chamber and is located above the guide seat. The feed pipe extends into the feeding box and is located on one side of the baffle. The left end of the filter screen is located on one side of the feed pipe. A motor is installed at the top end of the feeding cylinder. The output end of the motor extends through the feeding cylinder and is fixedly connected to a auger conveyor rod. The bottom end of the auger conveyor rod is rotatably connected to the inner bottom wall of the feeding cylinder, and the auger conveyor rod slides on the inner wall of the feeding cylinder.

[0009] Preferably, a plurality of material-loosening triangular plates are fixedly connected to the inner wall of the crushing box, and the material-loosening triangular plates are located above the two material guide seats.

[0010] Preferably, the left end of the filter screen is hinged to the inner wall of the feeding box, and there are two connecting rods.

[0011] Preferably, the right end of the filter screen is fixedly connected to an extension plate, and the extension plate slides on the inner wall of the feeding box. The inner wall of the feeding box is fixedly connected to a limit block, and the extension plate is supported on the limit block.

[0012] Preferably, the feed box has an inspection door on the front, and the inspection door is located above the filter screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention, through the coordinated arrangement of a feeding box, crushing box, protective frame, filter screen, electric push rod, baffle, connecting rod crushing mechanism, and lifting mechanism, facilitates the re-crushing of plastic particles accumulated on the filter screen. This eliminates the need for frequent manual cleaning of the filter screen and avoids the risk of burns from the injection molding tube. Simply moving the telescopic end of the electric push rod upwards moves the baffle, removing its obstruction of the feeding pipe. This causes the connecting rod to pull the filter screen upwards, and the electric push rod can reciprocate to move the baffle up and down, allowing the filter screen to swing and the plastic to slide downwards. The accumulated plastic on the filter screen then slides into the feeding pipe and finally into the feeding cylinder. The motor then drives the auger conveyor rod to rotate, conveying the plastic into the feeding cylinder upwards. Finally, the plastic is discharged through the discharge pipe back between the two crushing rollers for further crushing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model after the injection molding tube is removed;

[0017] Figure 3 This is a schematic diagram of the front section structure of the present invention after the injection molding tube has been removed;

[0018] Figure 4 This utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Injection molding pipe; 2. Feeding cylinder; 3. Feeding box; 4. Crushing box; 5. Discharge pipe; 6. Feeding pipe; 7. Inspection door; 8. Motor; 9. Conveyor rod; 10. Extension plate; 11. Filter screen; 12. Guide seat; 13. Crushing roller; 14. Material distribution triangle plate; 15. Protective frame; 16. Baffle; 17. Connecting rod; 18. Electric push rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1, such as Figure 1-4As shown, this embodiment proposes a feeding device for injection molds, including an injection tube 1, a feeding box 3 connected to the injection tube 1, a crushing box 4 installed at the top of the feeding box 3, a crushing mechanism inside the crushing box 4, capable of crushing the plastic particles poured into the crushing box 4, facilitating subsequent injection molding melting, a protective frame 15 fixedly connected to the inner wall of the feeding box 3 and a filter screen 11 movably connected thereto, since the top of the protective frame 15 is inclined, the plastic particles falling into the feeding box 3 will not accumulate at the top of the protective frame 15, an electric push rod 18 installed inside the protective frame 15, and the electric push rod 18 is located at the bottom of the protective frame 15, a baffle 16 fixedly connected to the telescopic end of the electric push rod 18, and the baffle 16 is slidably disposed on the inner wall of the feeding box 3, the operation of the electric push rod 18 can drive the baffle 16 to reciprocate up and down on the inner wall of the feeding box 3, and a connecting rod 17 is hinged to the top of the baffle 16. Furthermore, the bottom end of the connecting rod 17 is hinged to the filter screen 11. With the above structure, when a large amount of plastic particles accumulate on the filter screen 11, the operation of the electric push rod 18 drives the baffle 16 to rise, further causing the connecting rod 17 to pull the filter screen 11 upward and flip it, thus allowing the plastic accumulated on the filter screen 11 to slide off. The left side of the feeding box 3 is equipped with a lifting mechanism for conveying the plastic on the filter screen 11 to the crushing box 4. With the lifting mechanism, when the filter screen 11 is swinging, the plastic particles on the filter screen 11 can slide off into the lifting mechanism and be conveyed to the crushing box 4 for re-crushing, thus eliminating the need for frequent cleaning of the filter screen 11 and improving the practicality of the device. The machinery, parts and equipment in this device all adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0022] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. See the description below for details:

[0023] like Figure 3 As shown, the crushing mechanism includes two crushing rollers 13, both of which are installed inside the crushing box 4. The inner wall of the crushing box 4 is fixed with two opposing guide seats 12, and the two guide seats 12 are located above the two crushing rollers 13. With the above structure, the plastic poured into the crushing box 4 can be crushed. Both crushing rollers 13 are existing mature components, and will not be described in detail here.

[0024] like Figures 1 to 4As shown, the lifting mechanism includes a feeding cylinder 2, with a discharge pipe 5 connected to the top end of the feeding cylinder 2 and a feed pipe 6 connected to the bottom end. The discharge pipe 5 extends into the crushing box 4 and is located above the guide seat 12. The feed pipe 6 extends into the feeding box 3 and is located on one side of the baffle 16. The left end of the filter screen 11 is located on one side of the feed pipe 6. A motor 8 is installed at the top of the feeding cylinder 2. The output end of the motor 8 extends through the feeding cylinder 2 and is fixedly connected to a auger conveyor rod 9. The bottom end of the auger conveyor rod 9 is rotatably connected to the inner bottom wall of the feeding cylinder 2, and the auger conveyor rod 9 slides on the inner wall of the feeding cylinder 2. With the above structure, it is convenient to re-crush the plastic accumulated on the filter screen 11. No frequent manual removal and cleaning of the filter screen 11 is required. In specific operation, simply move the telescopic end of the electric push rod 18 upward to move the baffle 16 together and remove the obstruction of the feed pipe 6. This further causes the connecting rod 17 to pull the filter screen 11 upward to swing. The electric push rod 18 can reciprocate to control the baffle 16 to move up and down, so as to swing the filter screen 11 and facilitate the downward sliding of the plastic. This allows the plastic accumulated on the filter screen 11 to slide into the feed pipe 6 and finally into the feeding cylinder 2. Then, the operation of the motor 8 drives the auger conveyor rod 9 to rotate, which can convey the plastic falling into the feeding cylinder 2 upward. Finally, the plastic is poured back into the space between the two crushing rollers 13 through the discharge pipe 5 for crushing.

[0025] like Figure 3 As shown, several material distribution triangle plates 14 are fixedly connected to the inner wall of the crushing box 4, and the material distribution triangle plates 14 are located above the two material guide seats 12. With the setting of the material distribution triangle plates 14, the plastic poured into the crushing box 4 can be diverted and scattered. At the same time, the bottom of the material distribution triangle plates 14 can also prevent the crushed plastic from splashing out of the crushing box 4.

[0026] like Figure 3 and Figure 4 As shown, the left end of the filter screen 11 is hinged to the inner wall of the feeding box 3. There are two connecting rods 17, which enable the filter screen 11 to swing on the left side inside the feeding box 3. This helps to slide the unscreened plastic on the filter screen 11 into the feed pipe 6. The two connecting rods 17 can also ensure the stability of the filter screen 11 during the swing.

[0027] like Figure 2 As shown, an extension plate 10 is fixedly connected to the right end of the filter screen 11, and the extension plate 10 slides on the inner wall of the feeding box 3. A limit block is fixedly connected to the inner wall of the feeding box 3, and the extension plate 10 is supported on the limit block. With the extension plate 10, when the filter screen 11 swings, the plastic particles on the right side of the filter screen 11 can be prevented from falling off, thereby blocking the plastic on the right end of the filter screen 11.

[0028] like Figure 1As shown, the front of the feeding box 3 is provided with an inspection door 7, which is located above the filter screen 11. The inspection door 7 allows personnel to easily open it to maintain the components inside the feeding box 3, thus improving the practicality of the device. In addition, the inspection door 7 is provided with an observation window so that personnel can observe the condition of the filter screen 11 and thus facilitate its swing cleaning.

[0029] The working principle and usage process of this utility model are as follows: First, plastic granules are poured into the crushing box 4 and crushed by the crushing roller 13. Then, they are conveyed to the injection molding tube 1 for melting through the filter screen 11. However, some incompletely crushed plastic granules will accumulate on the filter screen 11. When there are many plastic granules accumulated on the filter screen 11, the extension end of the electric push rod 18 is moved upward to drive the baffle 16 to move together and remove the obstruction of the feed pipe 6. Furthermore, the connecting rod 17 pulls the filter screen 11 to swing upward, so that the plastic granules accumulated on the filter screen 11 can slide into the feed pipe 6 and finally slide into the feeding cylinder 2. Then, the operation of the motor 8 drives the auger conveyor rod 9 to rotate, so that the plastic falling into the feeding cylinder 2 can be conveyed upward. Finally, the plastic is poured back into the two crushing rollers 13 for crushing through the discharge pipe 5, so that the filter screen 11 does not need to be frequently removed and cleaned by personnel, thus improving the practicality of the device.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device for injection molds, comprising an injection tube (1), characterized in that: The injection molding tube (1) is connected to a feeding box (3). A crushing box (4) is installed at the top of the feeding box (3). A crushing mechanism is provided inside the crushing box (4). A protective frame (15) is fixedly connected to the inner wall of the feeding box (3), and a filter screen (11) is movably connected to it. An electric push rod (18) is installed inside the protective frame (15). A baffle (16) is fixedly connected to the telescopic end of the electric push rod (18), and the baffle (16) is slidably disposed on the inner wall of the feeding box (3). A connecting rod (17) is hinged to the top of the baffle (16), and the bottom end of the connecting rod (17) is hinged to the filter screen (11). A lifting mechanism for conveying the plastic on the filter screen (11) to the crushing box (4) is provided on the left side of the feeding box (3).

2. The feeding device for injection molds according to claim 1, characterized in that: The crushing mechanism includes two crushing rollers (13), both of which are installed inside the crushing box (4). The inner wall of the crushing box (4) is fixed with two opposing guide seats (12), and the two guide seats (12) are located above the two crushing rollers (13).

3. The feeding device for injection molds according to claim 2, characterized in that: The lifting mechanism includes a feeding cylinder (2), the top of which is connected to a discharge pipe (5), and the bottom of which is connected to a feed pipe (6). The discharge pipe (5) extends into the crushing box (4) and is located above the guide seat (12). The feed pipe (6) extends into the feeding box (3) and is located on one side of the baffle (16). The left end of the filter screen (11) is located on one side of the feed pipe (6). A motor (8) is installed at the top of the feeding cylinder (2). The output end of the motor (8) extends through the feeding cylinder (2) and is fixedly connected to a auger conveyor rod (9). The bottom end of the auger conveyor rod (9) is rotatably connected to the inner bottom wall of the feeding cylinder (2) and slides on the inner wall of the feeding cylinder (2).

4. The feeding device for injection molds according to claim 2, characterized in that: The inner wall of the crushing box (4) is fixed with several loose material triangular plates (14), and the loose material triangular plates (14) are located above the two guide seats (12).

5. The feeding device for injection molds according to claim 1, characterized in that: The left end of the filter screen (11) is hinged to the inner wall of the feeding box (3), and the connecting rod (17) is configured as two.

6. The feeding device for injection molds according to claim 1, characterized in that: The right end of the filter screen (11) is fixedly connected to an extension plate (10), and the extension plate (10) slides on the inner wall of the feeding box (3). The inner wall of the feeding box (3) is fixedly connected to a limit block, and the extension plate (10) is supported on the limit block.

7. The feeding device for injection molds according to claim 1, characterized in that: The feed box (3) has an inspection door (7) on the front, and the inspection door (7) is located above the filter screen (11).

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