Plastic particle mixing injection molding device

Abstract

The invention relates to the technical field of injection molding equipment, in particular to a plastic particle mixing injection molding device which is characterized in that the interior of a feeding box is divided into a plurality of feeding bins from left to right, different types of plastic particles are separately fed along the different feeding bins, and the plastic particles are fed into an injection system sequentially along a feeding opening, a gap in a material distributing cavity and a material falling cavity; the telescopic part stretches out and draws back by different lengths to drive the movable arc plate to move to be close to or away from the rotating rollers, namely the width of the gap is freely adjusted and controlled so as to adapt to plastic particles of different sizes, the specific width of the gap in the feeding bin is correspondingly set according to the matching proportion requirement, and the rotating rollers in different feeding bins can be set to rotate synchronously at the same speed. A plurality of power sources do not need to be independently arranged and are separately controlled, so that the equipment structure is more reasonable and simpler, and the control is simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to a plastic particle mixing injection molding device. Background Art

[0002] Injection molding mainly involves heating thermoplastic plastics or thermosetting plastics into a molten state, applying high pressure to the molten plastic, and injecting it into a mold cavity, and then cooling the molten plastic in the mold cavity to form it. This process involves mixing different types of plastic particles in a certain proportion, melting them through an injection molding machine, and injecting them into the mold cavity. In this regard, in the prior art, such as the multiple plastic particle mixing device and plastic color matching machine disclosed in Chinese patent document CN116619615A, different types of plastic particles are filled in each feed bin, and the actual plastic product ratio is determined according to the actual plastic product ratio. In order to meet the requirements of subsequent injection molding operations, a plurality of plastic particles are quantitatively conveyed to the inner cavity of a plastic particle mixing container by means of a quantitative conveying component. Specifically, the plastic particles in the feed bin enter between two adjacent teeth of a conveying gear to achieve quantitative conveying. The proportion of each plastic particle is regulated by controlling the rotation speed of the conveying gears in different feed bins. However, the position of the conveying gear is fixed, and the adaptability to plastic particles of different sizes is poor. In addition, each conveying gear needs to be individually and regulated to rotate at different speeds, which places high requirements on equipment and power sources and is inconvenient to operate. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a plastic particle mixing injection molding device to solve the problems of adaptability to plastic particles of different sizes and inconvenient control operations during the existing plastic particle mixing injection molding.

[0004] Based on the above purpose, the present invention provides a plastic particle mixed injection molding device, including an injection system for injection molding, the input end of the injection system is connected to a hydraulic feeding system for feeding materials into the injection system, the injection system is provided with a heating system for heating the plastic particles into a molten state, and the output end of the injection system is connected to a clamping system for cooling and molding:

[0005] A feed box is provided near the input end of the injection system, and multiple feed bins are provided in the feed box from left to right. A feed port is provided at the top of the feed bin, a material distribution cavity is provided in the middle of the feed bin below the feed port, and a material drop cavity is provided in the bottom of the feed bin below the material distribution cavity.

[0006] The material distribution cavity is designed to be in the shape of a horizontal cylinder, and a roller is rotatably connected in the material distribution cavity, and the roller is designed to be in the shape of a cylinder coaxial with the material distribution cavity;

[0007] A sealing plate is provided on one side of the feed port, and the bottom end of the sealing plate abuts against the rotating roller. A movable arc plate is provided on the inner side of the material distribution cavity, and a gap is left between the movable arc plate and the outer wall of the rotating roller. The movable arc plate is located on the other side relative to the sealing plate. A telescopic part is connected between the movable arc plate and the inner wall of the material distribution cavity. The telescopic part can be extended and retracted to different lengths to drive the movable arc plate to move closer to or away from the rotating roller.

[0008] Preferably, a roller shaft is connected through the feed box to drive the rollers in each feed bin to rotate.

[0009] Preferably, a plurality of convex teeth are arranged at intervals along the circumferential direction on the outer wall of the rotating roller, and the top end of the sealing plate is rotatably connected to the feed port. When the convex teeth rotate through the bottom end of the sealing plate, the sealing plate is driven to rotate so that the sealing plate pushes the plastic particles inward.

[0010] Preferably, the top cover of the feed bin is provided with a feed hopper, the inner diameter of the feed hopper gradually decreases from top to bottom, the bottom end of the feed hopper is connected to the top end of the feed port, and a top filter is provided at the connection.

[0011] Preferably, the blanking chamber is divided into an exhaust chamber on one side and a discharging chamber on the other side. The exhaust chamber is located below the same side of the sealing plate and is connected to an external fan for exhausting air outwards. An air outlet pipe is provided at the top of the discharging chamber below the movable arc plate. An air outlet is provided at one end of the air outlet pipe for blowing air toward the discharging chamber, which is used to blow dust and impurities in the plastic particles toward the exhaust chamber.

[0012] Preferably, a scraper is connected to the top of the exhaust chamber away from the discharge chamber, and the top of the scraper is connected to scraper hairs that abut against the rotating roller.

[0013] Preferably, a bottom filter is provided in the exhaust chamber.

[0014] Preferably, a sealing cloth is connected between the top and bottom ends of the movable arc plate and the inner wall of the material distribution chamber to form a sealed space between the movable arc plate and the inner wall of the material distribution chamber.

[0015] Preferably, one side of the air outlet pipe is connected to a branch pipe, and is communicated with the sealed space through the branch pipe. The air intake pressure of the branch pipe to the sealed space is controlled to adjust the distance between the movable arc plate and the rotating roller.

[0016] The beneficial effects of the present invention are as follows: a plurality of feed bins are divided from left to right into the feed box, a feed port is provided at the top of the feed bin, a distribution cavity is provided in the middle of the feed bin below the feed port, a blanking cavity is provided in the bottom of the feed bin below the distribution cavity, a roller is rotatably connected in the distribution cavity, different types of plastic particles are fed separately along different feed bins, and the plastic particles are fed into the injection system along the feed port, the gap in the distribution cavity, and the blanking cavity in turn, and the telescopic part is telescoped to different lengths to drive the movable arc plate to move closer to or away from the roller, that is, the width of the gap is freely adjusted to adapt to plastic particles of different sizes, and a specific gap width is set in the feed bin according to the ratio requirements, and the rollers in different feed bins can be set to rotate synchronously at the same speed, without having to separately set up multiple power sources and separately control them, so the equipment structure is more reasonable and simple, and the operation is also easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the injection molding device of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the feed bin of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the sealing plate of the present invention when rotating to push the material;

[0021] Figure 4 It is a schematic structural diagram of the movable arc plate of the present invention when it moves away from the rotating roller.

[0022] The markings in the figure are:

[0023] 100. Injection system; 200. Hydraulic feeding system; 1. Feed box; 2. Feed bin; 3. Feed port; 4. Material distribution chamber; 5. Material dropping chamber; 51. Material discharge chamber; 52. Exhaust chamber; 6. Roller; 61. Convex teeth; 7. Sealing plate; 8. Movable arc plate; 9. Telescopic part; 10. Roller; 11. Feed hopper; 12. Top filter; 13. Air outlet pipe; 131. Air outlet; 14. Scraper; 15. Scraping; 16. Bottom filter; 17. Sealing cloth; 18. Sealed space; 19. Branch pipe. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a plastic granule mixed injection molding device comprises an injection system 100 for injection molding, the input end of the injection system 100 is connected to a hydraulic feeding system 200 for feeding materials into the injection system 100, the injection system 100 is provided with a heating system for heating the plastic granules into a molten state, the output end of the injection system 100 is connected to a clamping system for cooling and molding, a feed box 1 is provided near the input end of the injection system 100, the feed box 1 is divided into a plurality of feed bins 2 from left to right, a feed port 3 is provided at the top of the feed bin 2, a feed distribution cavity 4 is provided in the middle of the feed bin 2 below the feed port 3, and the feed The bottom of the bin 2 is located below the material distribution chamber 4 and is connected to a material dropping chamber 5. The material distribution chamber 4 is designed to be a horizontal cylindrical shape. A roller 6 is rotatably connected in the material distribution chamber 4. The roller 6 is designed to be a cylindrical shape coaxial with the material distribution chamber 4. A sealing plate 7 is provided on one side of the feed port 3. The bottom end of the sealing plate 7 abuts against the roller 6. A movable arc plate 8 is provided on the inner side of the material distribution chamber 4, and a gap is left between the outer wall of the roller 6. The movable arc plate 8 is located on the other side relative to the sealing plate 7. A telescopic part 9 is connected between the movable arc plate 8 and the inner wall of the material distribution chamber 4. The telescopic part 9 is extended and retracted to different lengths to drive the movable arc plate 8 to move closer to or away from the roller 6.

[0027] The present invention is based on the existing conventional injection molding device and injection molding machine structure, such as Figure 1As shown, it includes an injection system 100 for injection molding, the input end of the injection system 100 is connected to a hydraulic feeding system 200 for feeding materials into the injection system 100, the injection system 100 is provided with a heating system for heating plastic particles into a molten state, and the output end of the injection system 100 is connected to a clamping system for cooling and molding, as shown in FIG. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a feed box 1 is provided on the injection system 100 near its input end, and the feed box 1 is divided into a plurality of feed bins 2 from left to right, a feed port 3 is opened on the top of the feed bin 2, a distribution chamber 4 is provided in the middle part of the feed bin 2 below the feed port 3, and a blanking chamber 5 is provided in the bottom part of the feed bin 2 below the distribution chamber 4. The distribution chamber 4 is designed to be a horizontal cylindrical shape, and a roller 6 is rotatably connected in the distribution chamber 4. The roller 6 is designed to be a cylindrical shape coaxial with the distribution chamber 4, and a sealing plate 7 is provided on one side of the feed port 3. The bottom end of the sealing plate 7 abuts on the roller 6, and a movable arc plate 8 is provided on the inner side of the distribution chamber 4, and a gap is left between the outer wall of the roller 6, and the movable arc plate 8 is located on the other side relative to the sealing plate 7. Thus, different types of plastic particles are fed separately along different feed bins 2, and the plastic particles are sequentially fed along the feed port 3, the gap in the distribution chamber 4, and the blanking chamber 5 to the injection molding machine. The feeding system 100 preferably includes a stirring and mixing feeding system at the bottom end of the feed box 1, which stirs and mixes the feed plastic particles with a good ratio, and then puts them into the injection system 100. In particular, a telescopic portion 9 is connected between the movable arc plate 8 and the inner wall of the distribution chamber 4. The telescopic portion 9 is extended to different lengths to drive the movable arc plate 8 to move closer to or away from the roller 6, that is, the width of the gap can be freely adjusted to adapt to plastic particles of different sizes, and a specific gap width is set in the feed bin 2 according to the ratio requirements. Obviously, the larger the gap width, the faster the material dropping speed and the larger the proportion of the material fed. The sealing plate 7 is used to control the unilateral dropping of the feed toward one side of the movable arc plate 8. The rollers 6 in different feed bins 2 can be set to rotate synchronously at the same speed. There is no need to separately set up multiple power sources and control them separately. The equipment structure is more reasonable and simple, and the operation is also easier.

[0028] The telescopic portion 9 may adopt conventional telescopic power components such as telescopic cylinders to adjust the width of the gap.

[0029] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a roller shaft 10 is connected through the feed box 1 to drive the rollers 6 in each feed bin 2 to rotate, that is, an external single power source such as a reduction motor is used to drive the rollers 6 to rotate synchronously at the same speed.

[0030] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a plurality of convex teeth 61 are arranged at intervals along the circumferential direction on the outer wall of the roller 6. The convex teeth 61 rotate synchronously with the roller 6, which is beneficial to further drive the plastic particles to fall efficiently along the roller surface of the roller 6. On the other hand, the top end of the sealing plate 7 is rotatably connected to the feed port 3, and a torsion spring can also be connected to the rotating connection. When the convex teeth 61 rotate through the bottom end of the sealing plate 7, it drives the sealing plate 7 to rotate, so that the sealing plate 7 pushes the plastic particles inward. The reciprocating shaking of the sealing plate 7 is beneficial to further disperse the feed and efficiently push the material.

[0031] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the top cover of the feed bin 2 is provided with a feed hopper 11, the inner diameter of the feed hopper 11 gradually decreases from top to bottom, the bottom end of the feed hopper 11 and the top end of the feed port are connected to each other, and a top filter screen 12 is provided at the connection point for filtering oversized impurity particles to prevent large impurity particles from entering the feed bin 2 and causing blockage.

[0032] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the blanking chamber 5 is divided into an exhaust chamber 52 on one side and a discharge chamber 51 on the other side. The exhaust chamber 52 is located below the same side of the sealing plate 7 and is connected to an external fan for exhausting air outwards. An air outlet pipe 13 is provided at the top of the discharge chamber 51 below the movable arc plate 8. An air outlet 131 is provided at one end of the air outlet pipe 13 for blowing air toward the discharge chamber 51, so as to blow dust impurities in the plastic particles toward the exhaust chamber 52, so that the lighter particle impurities in the plastic particles are blown toward the exhaust chamber 52 with the outlet air and discharged, and the plastic particles of normal weight are still discharged downward along the discharge chamber 51.

[0033] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a scraper 14 is connected to the top of the exhaust chamber 52 away from the discharge chamber 51, and the top of the scraper 14 is connected to a scraper 15 abutting against the roller 6. The scrapers 15 are densely arranged. As the roller 6 rotates, the scrapers 15 are used to scrape off impurities and dust adhering to the roller 6 and discharge them through the exhaust chamber 52. At the same time, the scrapers 15 are also used to close the distribution chamber 4 located on one side of the sealing plate 7.

[0034] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a bottom filter screen 16 is provided in the exhaust chamber 52 for filtering solid dust particles and lighter impurity particles.

[0035] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a sealing cloth 17 is connected between the top and bottom ends of the movable arc plate 8 and the inner wall of the material distribution chamber 4 to form a sealed space 18 between the movable arc plate 8 and the inner wall of the material distribution chamber 4 .

[0036] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, one side of the air outlet pipe 13 is connected with a branch pipe 19, and is connected with the sealed space 18 through the branch pipe 19. By controlling the air intake pressure of the branch pipe 19, since the sealing cloth 17 has a certain elasticity, it is used to adjust the distance between the movable arc plate 8 and the roller 6. More preferably, the air outlet pressure of the air outlet pipe 13 can be set to a fixed value, thereby adjusting the air intake pressure of the branch pipe 19. For example, the air intake pressure of the branch pipe 19 can be increased to reduce the distance between the movable arc plate 8 and the roller 6. At the same time, the air outlet pressure of the air outlet 131 is also reduced, thereby realizing the function of adaptively adjusting the dust removal wind pressure.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A plastic granule mixed injection molding device, comprising an injection system (100) for injection molding, wherein the input end of the injection system (100) is connected to a hydraulic feeding system (200) for feeding materials into the injection system (100), the injection system (100) is provided with a heating system for heating the plastic granules into a molten state, and the output end of the injection system (100) is connected to a mold clamping system for cooling and molding, characterized in that: The injection system (100) is provided with a feed box (1) near its input end, and the feed box (1) is divided into a plurality of feed bins (2) from left to right, and a feed port (3) is provided at the top of the feed bin (2), and a material distribution cavity (4) is provided in the middle of the feed bin (2) below the feed port (3), and a material drop cavity (5) is provided in the bottom of the feed bin (2) below the material distribution cavity (4); The material distribution chamber (4) is designed to be in the shape of a horizontal cylindrical body, a rotating roller (6) is rotatably connected in the material distribution chamber (4), and the rotating roller (6) is designed to be in the shape of a cylindrical body coaxial with the material distribution chamber (4); A sealing plate (7) is provided on one side of the feed port (3), and the bottom end of the sealing plate (7) is in contact with the rotating roller (6). A movable arc plate (8) is provided on the inner side of the material distribution chamber (4), and a gap is left between the movable arc plate (8) and the outer wall of the rotating roller (6). The movable arc plate (8) is located on the other side relative to the sealing plate (7). A telescopic part (9) is connected between the movable arc plate (8) and the inner wall of the material distribution chamber (4). The telescopic part (9) is telescopic to different lengths to drive the movable arc plate (8) to move closer to or away from the rotating roller (6).

2. A plastic particle mixing injection molding device according to claim 1, characterized in that: A roller shaft (10) is connected through the feed box (1) and is used to drive the rollers (6) in each feed bin (2) to rotate.

3. A plastic particle mixing injection molding device according to claim 2, characterized in that: A plurality of convex teeth (61) are arranged at intervals along the circumferential direction on the outer wall of the rotating roller (6); the top end of the sealing plate (7) is rotatably connected to the feed port (3); when the convex teeth (61) rotate through the bottom end of the sealing plate (7), the sealing plate (7) is driven to rotate, so that the sealing plate (7) pushes the plastic particles inward.

4. A plastic particle mixing injection molding device according to claim 1, characterized in that: The top cover of the feed bin (2) is provided with a feed hopper (11), the inner diameter of which gradually decreases from top to bottom, the bottom end of the feed hopper (11) is connected to the top end of the feed port (3), and a top filter screen (12) is provided at the connection point.

5. A plastic particle mixing injection molding device according to claim 1, characterized in that: The blanking chamber (5) is divided into an exhaust chamber (52) on one side and a discharge chamber (51) on the other side. The exhaust chamber (52) is located below the same side of the sealing plate (7) and is connected to an external fan for exhausting air outwards. An air outlet pipe (13) is provided at the top of the discharge chamber (51) below the movable arc plate (8). An air outlet (131) is provided at one end of the air outlet pipe (13) for blowing air toward the discharge chamber (51) for blowing dust and impurities in the plastic particles toward the exhaust chamber (52).

6. A plastic particle mixing injection molding device according to claim 5, characterized in that: A scraper (14) is connected to the top end of the exhaust chamber (52) away from the discharge chamber (51), and a scraper (15) abutting against the rotating roller (6) is connected to the top end of the scraper (14).

7. A plastic particle mixing injection molding device according to claim 5, characterized in that: A bottom filter screen (16) is provided in the air extraction chamber (52).

8. A plastic particle mixing injection molding device according to claim 5, characterized in that: A sealing cloth (17) is connected between the top and bottom ends of the movable arc plate (8) and the inner wall of the material distribution chamber (4), so as to form a sealed space (18) between the movable arc plate (8) and the inner wall of the material distribution chamber (4).

9. A plastic particle mixing injection molding device according to claim 8, characterized in that: One side of the air outlet pipe (13) is connected to a branch pipe (19), and is connected to the sealed space (18) through the branch pipe (19). The air intake pressure from the branch pipe (19) to the sealed space (18) is controlled to adjust the distance between the movable arc plate (8) and the rotating roller (6).

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