Energy-saving injection molding machine capable of recycling plastic waste

Abstract

The invention belongs to the technical field of waste recycling, and particularly relates to an energy-saving injection molding machine capable of recycling plastic waste, which comprises a working table, a mold table is arranged on the working table, a lower mold and an upper mold are respectively arranged on the mold table, an injection molding assembly is arranged on the upper mold, and a hopper is arranged on the injection molding assembly. A transmission assembly is installed on the workbench. The injection molding assembly comprises a charging barrel and a heating sleeve installed on the outer wall of the charging barrel, the transmission assembly comprises a transmission table and a transmission rod, one end of the charging barrel is connected with the transmission table, and the other end of the charging barrel is connected with the upper mold. The residual materials of the first group serve as the second group of injection molding tailings to be injected into the mold, it is ensured that the residual materials of the first group are cooled at the sprue position of the mold, and due to the fact that sprue excess materials of injection molding parts need to be cut off in subsequent machining, the accuracy of the color of the injection molding parts can be ensured while the residual materials are used for injection molding; and chromatic aberration of injection molded parts is avoided.

Description

Technical Field

[0001] This invention belongs to the field of waste recycling technology, specifically relating to an energy-saving injection molding machine capable of recycling plastic waste. Background Art

[0002] Plastic waste is a recyclable material. The plastic waste recycling process is a systematic process that aims to transform waste plastic into reusable resources. First, the recycled plastic is sorted according to type and color. Then, the sorted plastic is cleaned and broken down, and the raw material is used as a base material for injection molding.

[0003] During the injection molding process, since the colors of various injection molded parts are different, in order to avoid color differences in the injection molded parts, the material remaining in the hopper and barrel needs to be discharged after each group of workpieces is completed, so as to prevent the new color material from mixing with the residual material through the screw, resulting in color deviation of the injection molded parts. Existing technologies handle residual material inside the barrel by directly discharging it and then crushing it after cooling for reuse as injection molding raw material. However, existing technologies cannot directly use residual material in the barrel for injection molding; instead, they rely on material recycling for reuse, which increases equipment energy consumption and results in poor utilization of residual material. Therefore, this invention provides an energy-saving injection molding machine that can directly utilize residual materials. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an energy-saving injection molding machine capable of recycling plastic waste, thereby solving the technical problems in the prior art.

[0005] The objective of this invention can be achieved through the following technical solution: An energy-saving injection molding machine capable of recycling plastic waste, comprising a worktable, a mold platform mounted on the worktable, a lower mold and an upper mold respectively mounted on the mold platform, an injection molding assembly mounted on the upper mold, a hopper mounted on the injection molding assembly, and a transmission assembly mounted on the worktable; the injection molding assembly includes a barrel and a heating jacket mounted on the outer wall of the barrel, the transmission assembly includes a transmission platform and a transmission rod, one end of the barrel is connected to the transmission platform, and the other end is connected to the upper mold; a storage pipe is mounted on the end of the barrel near the upper mold, and a storage cavity is provided inside the storage pipe, the storage cavity being respectively... The device is equipped with a feed inlet and a discharge outlet. A hollow piston is slidably installed inside the storage pipe, and a screw is rotatably installed inside the material cylinder. The drive shaft of the screw has a hollow structure. The drive rod passes through the screw and connects to a bidirectional lead screw. The bidirectional lead screw passes through the hollow piston and is connected to material plates one and two inside the hollow piston. The transmission assembly also includes a motor one, a fixed ring two, and a cylinder. Motor one drives the screw to rotate, and the cylinder and motor two drive the drive rod to move and rotate, respectively. There are material inlets on both sides of the hollow piston. The rotation of the bidirectional lead screw drives material plates one and two to move relative to each other, so that material plates one and two block the material inlets.

[0006] As a further optimization or improvement of this solution, a guide rail is installed inside the transmission table, a slide block is slidably installed on the guide rail, an L-shaped plate is fixedly installed on the slide block, a second motor is installed on the L-shaped plate, the output end of the cylinder is connected to the L-shaped plate, and the output end of the second motor is connected to the transmission rod.

[0007] As a further optimization or improvement of this solution, a strip plate is slidably installed on the transmission rod. The strip plate is connected to a push plate via a connecting rod. The push plate slides inside the storage cavity. Fixing ring one and fixing ring two are respectively installed on the transmission rod, and fixing ring one and fixing ring two are located on both sides of the strip plate.

[0008] As a further optimization or improvement of this solution, an electromagnet is installed inside the storage tube, and a magnetic metal sheet is installed on the hollow piston. When the electromagnet is energized, it attracts the magnetic metal sheet.

[0009] As a further optimization or improvement of this solution, guide bars are installed inside the hollow piston, and material plate one and material plate two are slidably engaged with the guide bars respectively.

[0010] As a further optimization or improvement of this solution, a motor is fixedly installed inside the transmission table, a driven gear ring is installed on the screw, and the output end of the motor is connected to the driving gear, which meshes with the driven gear ring.

[0011] As a further optimization or improvement of this solution, an electromagnetic chuck is installed on the strip plate, and a magnetic block is installed on the fixing ring. The strip plate is connected to the fixing ring through the electromagnetic chuck.

[0012] The beneficial effects of this invention are: (1) The present invention uses the residual material of the first group as the second group of injection molding tail material to inject into the mold, ensuring that the residual material of the first group cools at the gate position of the mold. Since the gate residue of the injection molded part needs to be removed in subsequent processing, the present invention can use the residual material for injection molding while ensuring the accuracy of the color of the injection molded part and avoiding the existence of color difference in the injection molded part.

[0013] (2) The present invention uses a hollow piston to feed the residual material into the mold instead of a screw. When the residual material is pushed by the hollow piston, it can ensure that the residual material and the new color material are separated into layers, thus avoiding the mixing of the residual material and the new color material. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the injection molding component structure.

[0018] Figure 4 This is an exploded view of the injection molded component structure.

[0019] Figure 5 This is a sectional top view of the injection molding assembly and the transmission assembly.

[0020] Figure 6 This is a schematic diagram of the connection structure between the injection molding component and the transmission component.

[0021] Figure 7 This is a schematic diagram of the transmission connection between the bidirectional lead screw, material plate one, and material plate two.

[0022] Figure 8 This is a schematic diagram of the internal structure of a hollow piston.

[0023] Figure 9 This is a schematic diagram of the working state of the present invention.

[0024] Figure 10 This is a schematic diagram of the working state of the present invention.

[0025] The diagram shows: 1. Workbench; 2. Mold table; 3. Lower mold; 4. Upper mold; 5. Transmission assembly; 501. Transmission table; 502. Driven gear ring; 503. Drive gear; 504. Motor 1; 505. Transmission rod; 506. Motor 2; 507. Cylinder; 508. Slide; 509. L-shaped plate; 510. Guide rail; 511. Fixing ring 1; 512. Fixing ring 2; 513. Strip plate; 51 4. Connecting rod; 6. Injection molding assembly; 601. Barrel; 602. Heating jacket; 603. Storage tube; 604. Screw; 605. Hollow piston; 606. Double-acting lead screw; 607. Push plate; 608. Feed port; 609. Discharge port; 610. Storage chamber; 611. Electromagnet; 612. Magnetic metal sheet; 613. Material plate one; 614. Material plate two; 615. Guide bar; 616. Material inlet; 7. Hopper. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] See Figures 1-8An energy-saving injection molding machine capable of recycling plastic waste includes a worktable 1, a mold table 2 mounted on the worktable 1, a lower mold 3 and an upper mold 4 mounted on the mold table 2, an injection molding assembly 6 mounted on the upper mold 4, a hopper 7 mounted on the injection molding assembly 6, and a transmission assembly 5 mounted on the worktable 1. The injection molding assembly 6 includes a barrel 601 and a heating jacket 602 mounted on the outer wall of the barrel 601. The transmission assembly 5 includes a transmission platform 501 and a transmission rod 505. One end of the barrel 601 is connected to the transmission platform 501, and the other end is connected to the upper mold 4. A storage tube 603 is mounted on the end of the barrel 601 near the upper mold 4. The storage tube 603 has a storage cavity 610, which has an inlet 608 and a outlet 609. The storage tube 603 is hollow and slidably installed inside. The piston 605 has a screw 604 rotatably mounted inside the material cylinder 601. The drive shaft of the screw 604 is hollow. The drive rod 505 passes through the screw 604 and connects to a double-acting lead screw 606. The double-acting lead screw 606 passes through the hollow piston 605 and is connected to the material plate 613 and material plate 614 inside the hollow piston 605. The transmission assembly 5 also includes a motor 504, a fixing ring 512, and a cylinder 507. The motor 504 drives the screw 604 to rotate, and the cylinder 507 and the motor 506 drive the drive rod 505 to move and rotate, respectively. The hollow piston 605 has material inlets 616 on both sides. The rotation of the double-acting lead screw 606 drives the material plate 613 and material plate 614 to move relative to each other, so that the material plate 613 and material plate 614 block the material inlets 616, respectively.

[0028] Specifically, an electromagnetic chuck is installed on the strip plate 513, and a magnetic block is installed on the fixing ring 511. The strip plate 513 is connected to the fixing ring 511 through the electromagnetic chuck.

[0029] Specifically, a guide rail 510 is installed inside the transmission table 501, a slide block 508 is slidably installed on the guide rail 510, an L-shaped plate 509 is fixedly installed on the slide block 508, a second motor 506 is installed on the L-shaped plate 509, the output end of the cylinder 507 is connected to the L-shaped plate 509, and the output end of the second motor 506 is connected to the transmission rod 505.

[0030] Specifically, a strip plate 513 is slidably mounted on the transmission rod 505. The strip plate 513 is connected to the push plate 607 via a connecting rod 514. The push plate 607 slides inside the storage cavity 610. A first fixing ring 511 and a second fixing ring 512 are respectively mounted on the transmission rod 505, and the first fixing ring 511 and the second fixing ring 512 are located on both sides of the strip plate 513.

[0031] It should be noted that, in the initial state, see Figure 7Hollow piston 605 blocks inlet 608 and outlet 609. Electromagnet 611 is energized to attract magnetic metal sheet 612 on hollow piston 605, fixing hollow piston 605 in its current position. At the same time, material plate 1 613 and material plate 2 614 are located in the middle of hollow piston 605. During injection molding, lower mold 3 and upper mold 4 close, and screw 604 pushes material sequentially through inlet 616 on one side of hollow piston 605, material plate 2 614, material plate 1 613, and inlet 616 on the other side of hollow piston 605, injecting it into the mold.

[0032] After the first batch of injection molded parts is produced, see Figure 6 and Figure 9 The cylinder 507 drives the motor 506 to slide along the guide rail 510 and the transmission rod 505 via the L-shaped plate 509 and the slide block 508. The transmission rod 505 pushes the material plate 613 and the material plate 614 towards the discharge port 609 via the double-acting screw 606. When the fixing ring 512 on the transmission rod 505 contacts the strip plate 513, the cylinder 507 stops. When electromagnet 611 is de-energized, motor 2 506 drives transmission rod 505 and double-acting lead screw 606 to rotate synchronously. The rotation of double-acting lead screw 606 causes material plate 1 613 and material plate 2 614 to move away from each other. (See below) Figure 9 Since material plates 613 and 614 are located to the left of the hollow piston 605, when material plates 613 and 614 move relative to each other, material plate 613 first contacts the left side wall of the hollow piston 605. As material plate 613 continues to move, it pushes the hollow piston 605 to the left, i.e., towards the discharge port 609, thus opening the inlet port 608. After material plates 613 and 614 block the material passage 616 on the side wall of the hollow piston 605, the hollow piston 605 is in a blocked state. At this time, the screw 604 sends the remaining material into the storage chamber 610 through the inlet port 608. Then, the hollow piston 605, material plates 613 and 614 are reset. By sending the first set of residual material into the storage chamber 610, the mixing of new colorant and residual material is avoided, which would cause color difference in the injection molded parts.

[0033] It should be noted that, as is well known, after injection molding, residual material will be generated near the gate of the mold after the injection molded part is formed. This residual material needs to be cut off during subsequent processing.

[0034] Production of the second batch of injection molded parts; when the injection molding process is nearing completion, see... Figure 6 and Figure 10Cylinder 507 drives material plate 613 and material plate 614 towards the feed inlet 608 via transmission rod 505 and double-acting screw 606. Cylinder 507 stops when the fixing ring 511 on transmission rod 505 contacts strip plate 513. Motor 506 drives transmission rod 505 and double-acting screw 606 to rotate synchronously. The rotation of double-acting screw 606 causes material plate 613 and material plate 614 to move away from each other. (See also...) Figure 10 Since material plate 1 613 and material plate 2 614 are located on the right side of hollow piston 605, when material plate 1 613 and material plate 2 614 move relative to each other, material plate 2 614 first contacts the right side wall of hollow piston 605. As material plate 2 614 continues to move, material plate 2 614 pushes hollow piston 605 to the right, that is, to move in the direction of feed port 608, so that discharge port 609 opens. After material plate 1 613 and material plate 2 614 respectively block the feed port 616 on the side wall of hollow piston 605, hollow piston 605 is in a blocked state. The electromagnetic chuck on the strip plate 513 is connected to the fixing ring 511. The cylinder 507 pushes the transmission rod 505 to move towards the upper mold 4. During this process, the transmission rod 505 drives the strip plate 513 to move synchronously through the fixing ring 511. At this time, the strip plate 513 drives the push plate 607 through the connecting rod 514 to push the residual material inside the storage cavity 610 out of the discharge port 609. At the same time, the transmission rod 505 pushes the hollow piston 605 through the double-acting screw 606. The hollow piston 605 sends the first group of residual material into the mold gate, so that the first group of residual material is injected into the mold as the second group of injection tail material. This ensures that the first group of residual material cools at the mold gate position. Since the gate residual material of the injection molded part needs to be removed in subsequent processing, the present invention can use the residual material for injection molding while ensuring the accuracy of the color of the injection molded part and avoiding the existence of color difference in the injection molded part.

[0035] It should be noted that this invention uses a hollow piston 605 to feed the residual material into the mold, not a screw 604. When the residual material is pushed by the hollow piston 605, it ensures that the residual material and the new colorant are separated, preventing them from mixing. During the production of the second set of injection molded parts, the amount of new colorant can be appropriately reduced to ensure that the first set of residual material can be injected into the mold as tailings.

[0036] See Figure 7 An electromagnet 611 is installed inside the storage tube 603, and a magnetic metal sheet 612 is installed on the hollow piston 605. When the electromagnet 611 is energized, it attracts the magnetic metal sheet 612.

[0037] It should be noted that during the injection molding process, the electromagnet 611 is energized to attract the magnetic metal sheet 612, thereby fixing the current position of the hollow piston 605 and preventing the hollow piston 605 from shifting.

[0038] See Figure 8 The hollow piston 605 is internally fitted with a guide bar 615, and the first material plate 613 and the second material plate 614 are respectively slidably engaged with the guide bar 615.

[0039] It should be noted that when the bidirectional lead screw 606 rotates, it drives the material plate 613 and the material plate 614 to move away from each other. The guide bar 615 can provide guidance for the material plate 613 and the material plate 614 to ensure that the material plate 613 and the material plate 614 can block the material inlets 616 on both sides of the hollow piston 605, so that the hollow piston 605 is in a blocked state.

[0040] See Figures 5-6 The transmission table 501 has a motor 504 fixedly installed inside, and a driven gear ring 502 is installed on the screw 604. The output end of the motor 504 is connected to the driving gear 503, and the driving gear 503 meshes with the driven gear ring 502.

[0041] It should be noted that the motor 504 meshes with the driven gear ring 502 on the screw 604 through the driving gear 503, and drives the screw 604 to rotate through the motor 504.

[0042] The implementation principle of this invention is as follows: In the initial state, see Figure 7 Hollow piston 605 blocks inlet 608 and outlet 609. Electromagnet 611 is energized to attract magnetic metal sheet 612 on hollow piston 605, fixing hollow piston 605 in its current position. At the same time, material plate 1 613 and material plate 2 614 are located in the middle of hollow piston 605. During injection molding, lower mold 3 and upper mold 4 close, and screw 604 pushes material sequentially through inlet 616 on one side of hollow piston 605, material plate 2 614, material plate 1 613, and inlet 616 on the other side of hollow piston 605, injecting it into the mold.

[0043] After the first batch of injection molded parts is produced, see Figure 6 and Figure 9 The cylinder 507 drives the motor 506 to slide along the guide rail 510 and the transmission rod 505 via the L-shaped plate 509 and the slide block 508. The transmission rod 505 pushes the material plate 613 and the material plate 614 towards the discharge port 609 via the double-acting screw 606. When the fixing ring 512 on the transmission rod 505 contacts the strip plate 513, the cylinder 507 stops. When electromagnet 611 is de-energized, motor 2 506 drives transmission rod 505 and double-acting lead screw 606 to rotate synchronously. The rotation of double-acting lead screw 606 causes material plate 1 613 and material plate 2 614 to move away from each other. (See below) Figure 9Since material plates 613 and 614 are located to the left of the hollow piston 605, when material plates 613 and 614 move relative to each other, material plate 613 first contacts the left side wall of the hollow piston 605. As material plate 613 continues to move, it pushes the hollow piston 605 to the left, i.e., towards the discharge port 609, thus opening the inlet port 608. After material plates 613 and 614 block the material passage 616 on the side wall of the hollow piston 605, the hollow piston 605 is in a blocked state. At this time, the screw 604 sends the remaining material into the storage chamber 610 through the inlet port 608. Then, the hollow piston 605, material plates 613 and 614 are reset. By sending the first set of residual material into the storage chamber 610, the mixing of new colorant and residual material is avoided, which would cause color difference in the injection molded parts.

[0044] It should be noted that, as is well known, after injection molding, residual material will be generated near the gate of the mold after the injection molded part is formed. This residual material needs to be cut off during subsequent processing.

[0045] Production of the second batch of injection molded parts; when the injection molding process is nearing completion, see... Figure 6 and Figure 10 Cylinder 507 drives material plate 613 and material plate 614 towards the feed inlet 608 via transmission rod 505 and double-acting screw 606. Cylinder 507 stops when the fixing ring 511 on transmission rod 505 contacts strip plate 513. Motor 506 drives transmission rod 505 and double-acting screw 606 to rotate synchronously. The rotation of double-acting screw 606 causes material plate 613 and material plate 614 to move away from each other. (See also...) Figure 10 Since material plate 1 613 and material plate 2 614 are located on the right side of hollow piston 605, when material plate 1 613 and material plate 2 614 move relative to each other, material plate 2 614 first contacts the right side wall of hollow piston 605. As material plate 2 614 continues to move, material plate 2 614 pushes hollow piston 605 to the right, that is, to move in the direction of feed port 608, so that discharge port 609 opens. After material plate 1 613 and material plate 2 614 respectively block the feed port 616 on the side wall of hollow piston 605, hollow piston 605 is in a blocked state. The electromagnetic chuck on the strip plate 513 is connected to the fixing ring 511. The cylinder 507 pushes the transmission rod 505 to move towards the upper mold 4. During this process, the transmission rod 505 drives the strip plate 513 to move synchronously through the fixing ring 511. At this time, the strip plate 513 drives the push plate 607 through the connecting rod 514 to push the residual material inside the storage cavity 610 out of the discharge port 609. At the same time, the transmission rod 505 pushes the hollow piston 605 through the double-acting screw 606. The hollow piston 605 sends the first group of residual material into the mold gate, so that the first group of residual material is injected into the mold as the second group of injection tail material. This ensures that the first group of residual material cools at the mold gate position. Since the gate residual material of the injection molded part needs to be removed in subsequent processing, the present invention can use the residual material for injection molding while ensuring the accuracy of the color of the injection molded part and avoiding the existence of color difference in the injection molded part.

[0046] It should be noted that the present invention uses a hollow piston 605 to feed the residual material into the mold, rather than a screw 604. When the residual material is pushed by the hollow piston 605, it can ensure that the residual material and the new colorant are separated into layers, thus avoiding mixing between the residual material and the new colorant.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An energy-saving injection molding machine capable of recycling plastic waste, characterized in that: Includes a workbench (1), on which a mold table (2) is installed, on which a lower mold (3) and an upper mold (4) are respectively installed, on which an injection molding assembly (6) is installed, on which a hopper (7) is installed, and on which a transmission assembly (5) is installed. The injection molding assembly (6) includes a barrel (601) and a heating jacket (602) installed on the outer wall of the barrel (601). The transmission assembly (5) includes a transmission table (501) and a transmission rod (505). One end of the barrel (601) is connected to the transmission table (501), and the other end is connected to the upper mold (4). A storage tube (603) is installed at one end of the material cylinder (601) near the upper mold (4). The storage tube (603) has a storage cavity (610) inside. The storage cavity (610) has an inlet (608) and a outlet (609) respectively. A hollow piston (605) is slidably installed inside the storage tube (603). A screw (604) is rotatably installed inside the material cylinder (601). The drive shaft of the screw (604) is hollow. The drive rod (505) passes through the screw (604) and connects to a two-way lead screw (606). The two-way lead screw (606) passes through the hollow piston (605) and is connected to the material plate one (613) and material plate two (614) inside the hollow piston (605). The transmission assembly (5) also includes a motor (504), a fixed ring (512), and a cylinder (507). The motor (504) drives the screw (604) to rotate, and the cylinder (507) and the motor (506) drive the transmission rod (505) to move and rotate respectively. The hollow piston (605) has material inlets (616) on both sides. The rotation of the bidirectional screw (606) drives the material plate (613) and the material plate (614) to move relative to each other, so that the material plate (613) and the material plate (614) respectively block the material inlets (616).

2. The energy-saving injection molding machine capable of recycling plastic waste according to claim 1, characterized in that: The transmission table (501) is equipped with a guide rail (510), a slide block (508) is slidably installed on the guide rail (510), an L-shaped plate (509) is fixedly installed on the slide block (508), a second motor (506) is installed on the L-shaped plate (509), the output end of the cylinder (507) is connected to the L-shaped plate (509), and the output end of the second motor (506) is connected to the transmission rod (505).

3. The energy-saving injection molding machine capable of recycling plastic waste according to claim 2, characterized in that: A strip plate (513) is slidably mounted on the transmission rod (505). The strip plate (513) is connected to the push plate (607) via a connecting rod (514). The push plate (607) slides inside the storage cavity (610). A first fixing ring (511) and a second fixing ring (512) are respectively mounted on the transmission rod (505), and the first fixing ring (511) and the second fixing ring (512) are located on both sides of the strip plate (513).

4. An energy-saving injection molding machine capable of recycling plastic waste according to claim 1, characterized in that: An electromagnet (611) is installed inside the storage tube (603), and a magnetic metal sheet (612) is installed on the hollow piston (605). When the electromagnet (611) is energized, it attracts the magnetic metal sheet (612).

5. An energy-saving injection molding machine capable of recycling plastic waste according to claim 1, characterized in that: The hollow piston (605) is equipped with a guide bar (615), and the first material plate (613) and the second material plate (614) are respectively slidably engaged with the guide bar (615).

6. An energy-saving injection molding machine capable of recycling plastic waste according to claim 1, characterized in that: The transmission table (501) is internally fixedly equipped with a motor (504), and a driven gear ring (502) is installed on the screw (604). The output end of the motor (504) is connected to the driving gear (503), and the driving gear (503) meshes with the driven gear ring (502).

7. An energy-saving injection molding machine capable of recycling plastic waste according to claim 3, characterized in that: An electromagnetic chuck is installed on the strip plate (513), and a magnetic block is installed on the fixing ring (511). The strip plate (513) is connected to the fixing ring (511) through the electromagnetic chuck.

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