Plastic color-changing printing consumable extrusion device

Abstract

The utility model relates to the technical field of printing consumable production equipment, in particular to a plastic color-changing printing consumable extrusion device which comprises a charging barrel, a fixing shaft and a driving assembly, an extrusion die is arranged at the discharging end of the charging barrel, a branch pipe is arranged between the charging barrel and the extrusion die, a screw rod is arranged on the inner side of the charging barrel, and the fixing shaft is arranged on the inner side of the screw rod. Guide plates are arranged on the two sides of the fixed shaft, a first heating box is arranged on the outer side of the charging barrel, and a second heating box is arranged on the outer side of the branch pipe; according to the utility model, the charging barrels are separately arranged, and the plurality of groups of charging barrels are connected with the extrusion die by using the branch pipes, so that materials with various colors can be independently conveyed when the extruder is used for producing rainbow consumables, the colors are prevented from being mixed in a large area, and the fixed shaft and the flow guide plate are arranged in the screw rod, so that an air channel is formed in the screw rod; therefore, hot air can be introduced or the screw can be heated in order inside the screw, and the inside and the outside of the plastic are heated at the same time to accelerate melting.

Description

A plastic color-changing printing consumable extrusion device Technical Field

[0001] This utility model relates to the technical field of printing consumables production equipment, and in particular to a plastic color-changing printing consumables extrusion device. Background Technology

[0002] 3D printing consumables refer to the materials used in 3D printers, including the raw materials and auxiliary materials required by the printer. Among them, plastic consumables are the most common, such as PLA (polylactic acid), ABS (acrylonitrile-butadiene-styrene), TPU (thermoplastic polyurethane elastomer rubber), etc. In order to meet the needs, pigments are added to dye the consumables during production. The consumables sold are usually in rolls of thread.

[0003] To achieve better visual effects, rainbow-colored consumables have emerged. These consumables feature a variety of gradient colors. The difference between the production process of rainbow consumables and that of ordinary consumables lies in the extruder. Extruders used to produce rainbow consumables often have multiple independently controllable hoppers. During the extrusion process, these hoppers take turns feeding the screw, thus forming a rainbow shape.

[0004] The use of multiple hoppers on a single screw often results in the presence of various colors within the screw, which can easily lead to color mixing. The hoppers are arranged in a straight line above the screw, which places high demands on the control system. Discharging too early can cause color mixing, while discharging too late can create voids, resulting in a sharp drop in extrusion pressure. Furthermore, it is difficult to determine the end position of the plastic in the screw, further increasing the pressure control requirements. Summary of the Invention

[0005] To overcome the common problem of multiple hoppers on a single screw, which often results in multiple colors within the screw and a tendency for color mixing, the hoppers are arranged in a straight line above the screw. This places higher demands on the control system. Discharging too early can lead to color mixing, while discharging too late can cause voids, resulting in a sharp drop in extrusion pressure. Furthermore, it is difficult to determine the end position of the plastic in the screw, further complicating pressure control.

[0006] The technical solution of this utility model is as follows: a plastic color-changing printing consumable extrusion device, including a barrel, a fixed shaft, and a drive assembly. The number of barrels varies depending on the color of the consumable being produced. An extrusion die for extrusion molding is provided at the discharge end of the barrel. A branch pipe is provided between the barrel and the extrusion die. The branch pipe is connected to the barrel and the extrusion die by a flange. A screw for pushing the material is provided inside the barrel. A fixed shaft is provided inside the screw. Guide plates for guiding airflow are provided on both sides of the fixed shaft. A first heating box for heating is provided outside the barrel. A second heating box for heating and heat preservation is provided outside the branch pipe. A drive assembly is provided at the feed end of the barrel.

[0007] Preferably, the feed end of the material cylinder is equipped with a hopper for storing raw materials, and the hopper is connected to the material cylinder.

[0008] Preferably, the drive assembly includes a drive motor, pulleys, and a transmission belt. The drive motor is located at the feed end of the barrel, and pulleys are located at the output end of the drive motor and one end of the screw. A transmission belt is located on the outer side of the two sets of pulleys.

[0009] Preferably, a support seat is provided at one end of the fixed shaft outside the screw, and the fixed shaft is fixedly connected to the support seat.

[0010] Preferably, a rotary bearing is provided at one end of the fixed shaft that extends into the screw, and the fixed shaft is rotatably connected to the screw by means of the rotary bearing.

[0011] Preferably, the length of the guide plate is less than the length of the fixed shaft, and a gap is left at the end of the guide plate near the rotating bearing.

[0012] Preferably, a guide pipe is provided at one end of the fixed shaft outside the screw, and the two sets of guide pipes are connected and communicate with the spaces on both sides of the guide plate.

[0013] The beneficial effects of this utility model are:

[0014] Multiple drive components cycle through the screws to transport materials. When one set of screws rotates, the others stop rotating, thus enabling independent transport of materials of different colors. This process eliminates the need to position the material within the screws or use hoppers that require controlled discharge, significantly reducing production costs. Furthermore, a fixed shaft and guide plate are installed inside the screws to create an air duct, allowing hot air to be introduced or the screws to be heated internally. This ensures that the plastic is heated both inside and out simultaneously, accelerating and uniformly melting. Attached Figure Description

[0015] Figure 1 shows a three-dimensional structural schematic diagram of this utility model;

[0016] Figure 2 shows a three-dimensional structural diagram of the branch pipe of this utility model;

[0017] Figure 3 shows a three-dimensional structural diagram of the drive component of this utility model;

[0018] Figure 4 shows a schematic diagram of the three-dimensional structure of the screw of this utility model.

[0019] Figure 5 shows a three-dimensional structural diagram of the fixed shaft of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Barrel; 2. Extrusion die; 3. Branch pipe; 5. Hopper; 6. Drive motor; 7. Screw; 8. Fixed shaft; 401. First heating box; 402. Second heating box; 601. Pulley; 602. Transmission belt; 801. Support base; 802. Rotary bearing; 803. Guide plate; 804. Air guide pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to Figures 1-5. This utility model provides an embodiment: a plastic color-changing printing consumable extrusion device, including a barrel 1, a fixed shaft 8, and a drive assembly. The number of barrels 1 varies depending on the color of the consumable being produced. An extrusion die 2 for extrusion molding is provided at the discharge end of the barrel 1. A branch pipe 3 is provided between the barrel 1 and the extrusion die 2, and the branch pipe 3 is connected to the barrel 1 and the extrusion die 2 by a flange. A screw 7 for pushing the material is provided inside the barrel 1, and a fixed shaft 8 is provided inside the screw 7. Airflow guide plates 803 for guiding airflow are provided on both sides of the fixed shaft 8. A useful... The first heating box 401 is used for heating, and the second heating box 402 for heating and heat preservation is provided on the outside of the branch pipe 3. The feed end of the barrel 1 is provided with a drive assembly. By setting the barrels 1 separately and connecting multiple sets of barrels 1 to the extrusion die 2 using the branch pipe 3, the extruder can independently convey materials of various colors when producing rainbow consumables, preventing large-area mixing of colors. In addition, a fixed shaft 8 and a guide plate 803 are set inside the screw 7 to form an air duct inside the screw 7, so that hot air can be introduced or the screw 7 can be heated inside the screw 7, thereby making the plastic heat up and melt faster.

[0023] Please refer to Figure 2. In this embodiment, the feed end of the material cylinder 1 is provided with a hopper 5 for storing raw materials. The hopper 5 is connected and communicates with the material cylinder 1. The hopper 5 is used to store plastics of different colors.

[0024] Please refer to Figure 3. In this embodiment, the drive assembly includes a drive motor 6, a pulley 601, and a transmission belt 602. The drive motor 6 is provided at the feed end of the material cylinder 1. The pulley 601 is provided at the output end of the drive motor 6 and one end of the screw 7. The transmission belt 602 is provided on the outer side of the two sets of pulleys 601. The drive motor 6 outputs power, and the power is transmitted by the pulley 601 and the transmission belt 602 to make the screw 7 rotate and convey the material.

[0025] Please refer to Figures 4 and 5. In this embodiment, a support seat 801 is provided at one end of the fixed shaft 8 outside the screw 7. The fixed shaft 8 is fixedly connected to the support seat 801. A rotary bearing 802 is provided at one end of the fixed shaft 8 extending into the screw 7. The fixed shaft 8 is rotatably connected to the screw 7 via the rotary bearing 802. The length of the guide plate 803 is less than the length of the fixed shaft 8. A gap is left at the end of the guide plate 803 near the rotary bearing 802. An air guide pipe 804 is provided at the end of the fixed shaft 8 outside the screw 7. The two sets of air guide pipes 804 are respectively connected and communicate with the spaces on both sides of the guide plate 803. The seat 801 is used to fix one end of the shaft 8. The rotary bearing 802 rotatably connects the fixed shaft 8 to the screw 7 and supports the other end of the fixed shaft 8. Steam or high-temperature air is introduced into the inner space of the screw 7 through a set of air guide pipes 804. Under the guidance of the guide plate 803, the airflow enters the inner depth of the screw 7 from one side of the guide plate 803. Under the obstruction of the end of the screw 7, it enters the space on the other side of the guide plate 803 through the gap between the guide plate 803 and the screw 7, turns back, and leaves the screw 7 through another set of air guide pipes 804, forming a flowing high-temperature airflow to heat the screw 7 and the material.

[0026] In operation, the drive motor 6 outputs power, which is transmitted through the pulley 601 and the transmission belt 602 to rotate the screw 7 and convey the material in the hopper 5. The first heating box 401 heats the material cylinder 1, thereby heating the exterior of the material. Steam or high-temperature air is introduced into the inner space of the screw 7 through a set of air guide pipes 804. Guided by the guide plate 803, the airflow enters the inner depth of the screw 7 from one side of the guide plate 803, and is blocked at the end of the screw 7, exiting through the gap between the guide plate 803 and the screw 7. The material enters the space on the other side of the guide plate 803 and turns back, leaving the screw 7 through another set of air pipes 804. This forms a flowing high-temperature airflow that heats the screw 7 and the material. The material is heated both inside and out, accelerating melting and making the melting uniform. The melted material enters the branch pipe 3 and is extruded from the extrusion die 2. The second heating box 402 heats and keeps the material in the branch pipe 3 warm to prevent solidification. During this process, multiple sets of drive motors 6 are started in cycles, so that materials of different colors are circulated and transported, thus forming rainbow-colored consumables.

[0027] Through the above steps, by setting up the material barrels 1 separately and connecting multiple sets of material barrels 1 to the extrusion die 2 using the branch pipe 3, the extruder can independently convey materials of various colors when producing rainbow consumables, preventing large-area mixing of colors. In addition, a fixed shaft 8 and a guide plate 803 are set inside the screw 7 to form an air duct inside the screw 7, so that hot air can be introduced or the screw 7 can be heated inside the screw 7, thereby making the plastic heat up and melt faster.

Claims

1. A plastic color-changing printing consumable extrusion device, comprising a material cylinder (1); characterized in that: It also includes a fixed shaft (8) and a drive assembly. The number of barrels (1) varies depending on the color of the production consumables. The discharge end of the barrel (1) is provided with an extrusion die (2) for extrusion molding. A branch pipe (3) is provided between the barrel (1) and the extrusion die (2). The branch pipe (3) is connected to the barrel (1) and the extrusion die (2) by a flange. A screw (7) for pushing the material is provided on the inner side of the barrel (1). A fixed shaft (8) is provided on the inner side of the screw (7). A guide plate (803) for guiding airflow is provided on both sides of the fixed shaft (8). A first heating box (401) for heating is provided on the outer side of the barrel (1). A second heating box (402) for heating and heat preservation is provided on the outer side of the branch pipe (3). A drive assembly is provided at the feed end of the barrel (1).

2. The plastic color-changing printing consumable extrusion device according to claim 1, characterized in that: The feed end of the material cylinder (1) is provided with a hopper (5) for storing raw materials, and the hopper (5) is connected to the material cylinder (1).

3. The plastic color-changing printing consumable extrusion device according to claim 1, characterized in that: The drive assembly includes a drive motor (6), a pulley (601) and a transmission belt (602). The feed end of the barrel (1) is provided with a drive motor (6), the output end of the drive motor (6) and one end of the screw (7) are provided with a pulley (601), and the outer side of the two sets of pulleys (601) is provided with a transmission belt (602).

4. The plastic color-changing printing consumable extrusion device according to claim 1, characterized in that: A support base (801) is provided at one end of the fixed shaft (8) outside the screw (7), and the fixed shaft (8) is fixedly connected to the support base (801).

5. A plastic color shifting print consumable extrusion device according to claim 1, wherein: A rotary bearing (802) is provided at one end of the fixed shaft (8) that extends into the screw (7), and the fixed shaft (8) is rotatably connected to the screw (7) by means of the rotary bearing (802).

6. The plastic color-changing printing consumable extrusion device according to claim 5, characterized in that: The length of the guide plate (803) is less than the length of the fixed shaft (8), and there is a gap at the end of the guide plate (803) near the rotating bearing (802).

7. The plastic color-changing printing consumable extrusion device according to claim 1, characterized in that: The fixed shaft (8) is provided with an air guide pipe (804) at one end outside the screw (7). The two sets of air guide pipes (804) are connected to the space on both sides of the guide plate (803).

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