Uniform color mixing mechanism for multi-color injection molding of high-transmittance automobile lamp and mixing method of uniform color mixing mechanism

Abstract

The uniform color mixing mechanism comprises a stirring barrel, a color mixing assembly is arranged in the stirring barrel, a connecting barrel is fixedly connected to the upper portion of the stirring barrel, a first supporting plate is fixedly connected to the upper portion of the connecting barrel, and the connecting barrel penetrates through the first supporting plate to be fixedly connected to a discharging hopper; a second supporting plate is fixedly connected above the discharging hopper, the discharging hopper penetrates through the second supporting plate and is fixedly connected with a proportional valve, the top of the proportional valve is fixedly connected with a connector, and a second sieve plate is arranged in the connector; a conveying assembly is arranged in the connecting cylinder. According to the multi-color injection molding machine, the multiple sets of discharging hoppers and connecting cylinders are arranged and matched with the conveying assembly, so that multiple pigments can be used for color mixing, and injection molding finished products have more colors and different visual effects; the first rotating shaft and the second rotating shafts are arranged, the first gear is meshed with the second gear, so that the driving motor drives the second rotating shafts to rotate, and the energy consumption during operation of the color mixing mechanism is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of high-transparency automobile lamp injection molding color mixing, in particular to a uniform color mixing mechanism and a mixing method for high-transparency automobile lamp multi-color injection molding. Background Art

[0002] High-transmittance car lights refer to car light components made of high-transmittance materials (such as polycarbonate PC or optical-grade glass). Its core feature is that the transmittance can reach more than 90%, which can significantly reduce light scattering and energy loss. High-transmittance car lights usually use injection molding to manufacture lampshades or lamp shells, and different car models or design requirements often require car light parts of different colors. In the prior art, if it is necessary to produce car lights of multiple colors, it is usually necessary to replace the injection molding materials or perform secondary processing such as post-spraying and coating, which not only increases the production cost and process complexity, but may also cause problems such as color difference or coating shedding. In addition, frequent replacement of injection molding materials will also reduce production efficiency and increase scrap rate.

[0003] After searching, it was found that the application number is CN202210366472.3, which discloses an online color mixing device and method for a plastic extrusion production line, including a main feeding system, a color powder feeding system, and a material mixing system; the material mixing system includes a material feeding pipe, a gating device, a main color material feeding channel, and a color material feeding channel for mixing colors; the main feeding system and the color powder feeding system are both fixedly connected to the body of the material feeding pipe, the lower part of the material feeding pipe is fixedly connected to the gating device, and the main color material feeding channel and the color material feeding channel are respectively connected to the gating device. The device solves the problems of material color pollution and difficulty in cleaning in the prior art, and has the characteristics of high efficiency and low pollution.

[0004] However, when the above equipment is in use, only two colorants can be used for color mixing, the colors that can be produced are limited, and the visual effects achieved are also limited. At the same time, the color mixing mechanism lacks a heater and a screening structure, resulting in uneven color mixing and poor color mixing effect, which leads to poor quality of the injection molded product. Summary of the invention

[0005] The object of the present invention is to provide a uniform color mixing mechanism and a mixing method for multi-color injection molding of high-transparency automobile lamps, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps, comprising:

[0008] A mixing drum, wherein a color mixing assembly is arranged inside the mixing drum, a connecting drum is fixedly connected to the top of the mixing drum, a first support plate is fixedly connected to the top of the connecting drum, the connecting drum penetrates the first support plate and is fixedly connected to the lower hopper, a second support plate is fixedly connected to the top of the lower hopper, a quantitative valve is fixedly connected to the lower hopper through the second support plate, the top of the quantitative valve is fixedly connected to a connecting port, and a second sieve plate is arranged in the connecting port;

[0009] A conveying assembly is arranged in the connecting cylinder for conveying different colorants into the mixing cylinder.

[0010] Preferably, the conveying assembly includes a driving motor, the driving motor is fixedly connected to the bottom of the first supporting plate, the output end of the driving motor is rotatably connected to a first rotating shaft, and the first rotating shaft passes through the mixing drum and reaches the bottom of the mixing drum.

[0011] Preferably, the first rotating shaft is located above the mixing drum and is fixedly connected to a first gear, the first gear is meshed with a second gear, and a rotating ring is fixedly connected to the inner side of the second gear.

[0012] Preferably, an extension ring is fixedly connected to the top of the rotating ring, a ball is arranged on the top of the extension ring, and the extension ring and the ball are engaged with an annular rotation groove provided in the bottom of the connecting tube.

[0013] Preferably, a connecting plate is fixedly connected to the bottom of the rotating ring, a second rotating shaft is fixedly connected to the upper end surface of the connecting plate, a spiral push plate is fixedly connected to the outer side of the second rotating shaft, a cartridge heater is installed inside the second rotating shaft, and a heat conduction cavity is set between the cartridge heater and the outer wall of the second rotating shaft.

[0014] Preferably, the spiral push plate and the second rotating shaft extend into the lower hopper, a cutter is provided on the inner wall of the lower hopper, and the cutter and the spiral push plate blades are staggered.

[0015] Preferably, the color mixing component includes a first rotating shaft, which is located in a mixing drum and has a first stirring rod installed thereon. A discharge port is provided at the bottom of the mixing drum, a lower end of the discharge port is fixedly connected to a discharge pipe, and the discharge pipe is connected to the injection molding structure.

[0016] Preferably, a first sieve plate is disposed in the middle of the first rotating shaft of the mixing drum, and a plurality of sieve holes of the same size are provided on the first sieve plate.

[0017] Preferably, the first rotating shaft is located above the first sieve plate and is equipped with a second stirring rod, a brush plate is provided on the lower end surface of the second stirring rod, and the brush plate is tightly fitted to the upper end surface of the first sieve plate.

[0018] A mixing method of a uniform color mixing mechanism for multi-color injection molding of a high-transparency automobile lamp comprises the following steps:

[0019] S1: Feeding: according to the color matching needs, the amount of different colorants entering the lower hopper is controlled by the quantitative valve.

[0020] S2: Conveying, using multiple lower hoppers and the second rotating shaft and spiral push plate set in the connecting barrel to convey different colorants into the mixing barrel. At the same time, the cutter on the inner wall of the lower hopper preliminarily breaks up the colorants, and the cartridge heater in the second rotating shaft preliminarily heats the colorants.

[0021] S3: Color mixing: different color materials are transported to the mixing drum through multiple connecting drums, stirred by the first stirring rod on the first rotating shaft for color mixing, sieved by the second sieve plate, and then transported to the injection molding structure through the discharge pipe for injection molding.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention can use a variety of colorants for color mixing by arranging a plurality of groups of lower hoppers and connecting cylinders in combination with a conveying component, so that the injection molded product has more colors and different visual effects.

[0024] The present invention provides a first rotating shaft and a second rotating shaft, utilizes the first gear and the second gear to mesh with each other, and utilizes a driving motor to drive multiple second rotating shafts to rotate, thereby reducing energy consumption during operation of the color mixing mechanism.

[0025] The present invention sets a first sieve plate in the mixing drum, and the mixed colorant needs to be screened by the first sieve plate. Only qualified colorant can pass through the first sieve plate into the bottom of the mixing drum for discharge, and unqualified colorant will remain in the upper half of the mixing drum to continue mixing and color mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a three-dimensional schematic diagram of the interior of the mixing drum of the present invention;

[0028] Figure 3 A three-dimensional schematic diagram of a conveying assembly of the present invention;

[0029] Figure 4 It is a three-dimensional schematic diagram of the installation of the second gear and the rotating ring of the present invention;

[0030] Figure 5 For the present invention Figure 4 Three-dimensional schematic diagram from another perspective;

[0031] Figure 6 For the present invention Figure 1 Three-dimensional schematic diagram from another perspective;

[0032] Figure 7This is a schematic diagram of the interior of the lower hopper of the present invention;

[0033] Figure 8 This is a schematic diagram of the interior of the first rotating shaft of the present invention.

[0034] In the figure: 1-mixing drum; 101-first stirring rod; 102-second stirring rod; 103-first sieve plate; 104-discharging port; 105-discharging pipe; 2-first support plate; 3-second support plate; 4-quantitative valve; 5-connecting port; 501-second sieve plate; 6-discharging hopper; 601-cutter; 7-connecting drum; 701-annular rotating groove; 8-driving motor; 9-first rotating shaft; 10-first gear; 11-second gear; 12-rotating ring; 1201-second rotating shaft; 1202-spiral push plate; 1203-extension ring; 1204-ball; 1205-connecting plate; 1206-cartridge heater; 1207-heat transfer chamber. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example:

[0037] See also Figures 1 to 8 , the present invention provides a technical solution:

[0038] A uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps, comprising:

[0039] A mixing drum 1, wherein a color mixing component is arranged inside the mixing drum 1, a connecting drum 7 is fixedly connected to the top of the mixing drum 1, a first support plate 2 is fixedly connected to the top of the connecting drum 7, the connecting drum 7 penetrates the first support plate 2 and is fixedly connected to a lower hopper 6, a second support plate 3 is fixedly connected to the top of the lower hopper 6, a quantitative valve 4 is fixedly connected to the lower hopper 6 through the second support plate 3, the top of the quantitative valve 4 is fixedly connected to a connecting port 5, and a second sieve plate 501 is arranged in the connecting port 5;

[0040] The connecting cylinder 7 is provided with a conveying assembly for conveying different colorants into the mixing cylinder 1 .

[0041] In this embodiment, a plurality of connecting cylinders 7 and a lower hopper 6 are arranged on the mixing cylinder 1, and a plurality of colorants can be used for color mixing at the same time. A driving motor 8 is fixedly connected to the lower side of the first supporting plate 2, and an output end of the driving motor 8 is fixedly connected to a first rotating shaft 9. A first gear 10 is fixedly connected to the outside of the first rotating shaft 9, and the first gear 10 and the second gear 11 are meshed with each other. The second gear 11 is sleeved on the outer side of the rotating ring 12, and the rotating ring 12 is engaged with the bottom of the connecting cylinder 7 through an extension ring 1203. When the driving motor 8 drives the first rotating shaft 9 to rotate, the first rotating shaft 9 drives the first gear 10 to rotate, and the first gear 10 drives the second gear 11 meshed with it to rotate, and drives the rotating ring 12 to rotate. The ball 1204 on the top of the extension ring 1203 can reduce the friction of the rotating ring 12. A connecting ring 12 is arranged at the bottom of the rotating ring 12 Plate 1205, a second rotating shaft 1201 is set on the upper end surface of the connecting plate 1205, the rotation of the rotating ring 12 drives the second rotating shaft 1201 to rotate, and the rotation of the second rotating shaft 1201 drives the spiral push plate 1202 fixedly connected to the outer side of the second rotating shaft 1201 to rotate, the spiral push plate 1202 and the second rotating shaft 1201 extend to the lower hopper 6 at the top of the connecting cylinder 7, and different kinds of colorants are discharged into the lower hopper 6 through the connecting port 5 and the metering valve 4 at the top of the lower hopper 6. The spiral push plate 1202 rotates continuously to convey the colorant from the top of the lower hopper 6 to the connecting cylinder 7 and then to the mixing cylinder 1. During the conveying process, the cutter 601 set on the inner wall of the lower hopper 6 preliminarily breaks up the colorant on the spiral push plate 1202, so that the colorant particles are looser, so that the subsequent mixing rate between different colorants is faster and more efficient.

[0042] In this embodiment, the connecting port 5 is connected to the external raw material tank through a pipeline, and the connecting port 5 is fixedly connected to the metering valve 4 through threads. The connecting port 5 can be quickly disassembled through the threads. A second sieve plate 501 is installed in the connecting port 5. The sieve holes of the second sieve plate 501 are larger than the sieve holes of the first sieve plate 103. The second sieve plate 501 performs preliminary screening on the colorant to screen out colorant particles that are too large and difficult to mix. After the second sieve plate 501 is blocked, the connecting port 5 can be disassembled by disassembling the second sieve plate 501 through the threads.

[0043] Specifically, the conveying assembly includes a drive motor 8, which is fixedly connected to the bottom of the first support plate 2 through a motor support frame (not shown in the figure). The output end of the drive motor 8 is rotatably connected to a first rotating shaft 9, which passes through the mixing drum 1 and reaches the bottom of the mixing drum 1.

[0044] Specifically, the first rotating shaft 9 is located above the mixing drum 1 and is fixedly connected to a first gear 10 . The first gear 10 is meshed with a second gear 11 . A rotating ring 12 is fixedly connected to the inner side of the second gear 11 .

[0045] Specifically, an extension ring 1203 is fixedly connected to the top of the rotating ring 12 , and a ball 1204 is provided on the top of the extension ring 1203 . The extension ring 1203 and the ball 1204 are engaged with the annular rotating groove 701 provided at the bottom of the connecting tube 7 .

[0046] In the present invention, a cartridge heater 1206 is installed inside the second rotating shaft 1201. The cartridge heater 1206 continuously heats when the second rotating shaft 1201 and the spiral push plate 1202 rotate, and transfers heat through a heat conduction cavity 1207 arranged between the second rotating shaft 1201 and the cartridge heater 1206. The heat conduction cavity 1207 is filled with a heat conduction medium, and the heat generated by the cartridge heater 1206 is transferred to the colorant being transported in the connecting tube 7 for heating. There are differences in the suitable heating and melting temperatures for colorants of different materials. Too high or too low a temperature may affect the quality of the finished product. By setting different heating temperatures for the cartridge heaters 1206 in the plurality of connecting tubes 7 and the lower hopper 6, each colorant hopper can be fully heated and melted, thereby improving the quality of the mixed color finished product.

[0047] Specifically, a connecting plate 1205 is fixedly connected to the bottom of the rotating ring 12, a second rotating shaft 1201 is fixedly connected to the upper end surface of the connecting plate 1205, a spiral push plate 1202 is fixedly connected to the outer side of the second rotating shaft 1201, a cartridge heater 1206 is installed inside the second rotating shaft 1201, and a heat conduction cavity 1207 is set between the cartridge heater 1206 and the outer wall of the second rotating shaft 1201.

[0048] Specifically, the spiral push plate 1202 and the second rotating shaft 1201 extend into the lower hopper 6 , and a cutter 601 is disposed on the inner wall of the lower hopper 6 . The cutter 601 and the blades of the spiral push plate 1202 are arranged alternately.

[0049] In this embodiment, the first rotating shaft 9 is located in the mixing drum 1 and multiple groups of first stirring rods 101 are arranged. The colorant is transported to the mixing drum 1 through the lower hopper 6 and the connecting drum 7. When the driving motor 8 drives the first rotating shaft 9 to rotate, the first rotating shaft 9 is located in the mixing drum 1 and multiple groups of first stirring rods 101 are installed. The rotation of the first rotating shaft 9 drives the first stirring rods 101 to stir. The first stirring rods 101 fully mix different colorants. A first sieve plate 103 is arranged in the middle of the mixing drum 1. The mixed colorant needs to be sieved by the first sieve plate 103. Only qualified colorants can pass through the first sieve plate 103 and enter the bottom of the mixing drum 1 for discharge, and unqualified colorants will remain in the upper half of the mixing drum 1 to continue to be stirred and mixed. At the same time, the first rotating shaft 9 is located above the first sieve plate 103, and a second stirring rod 102 is arranged. A brush plate is arranged on the lower end face of the second stirring rod 102, and the brush plate is tightly fitted with the upper end face of the first sieve plate 103. When the first rotating shaft 9 drives the second stirring rod 102 to rotate, the brush plate cleans the sieve holes on the surface of the first sieve plate 103 to prevent the sieve holes of the first sieve plate 103 from being blocked.

[0050] Specifically, the color mixing component includes a first rotating shaft 9, which is located in the mixing drum 1 and is equipped with a first stirring rod 101. A discharge port 104 is provided at the bottom of the mixing drum 1, and a discharge pipe 105 is fixedly connected to the lower end of the discharge port 104. The discharge pipe 105 is connected to the injection molding structure.

[0051] Specifically, a first sieve plate 103 is disposed in the middle of the first rotating shaft 9 in the mixing drum 1 , and a plurality of sieve holes of the same size are provided on the first sieve plate 103 .

[0052] Specifically, the first rotating shaft 9 is located above the first sieve plate 103 and is provided with a second stirring rod 102 . A brush plate is provided on the lower end surface of the second stirring rod 102 . The brush plate is tightly fitted to the upper end surface of the first sieve plate 103 .

[0053] Based on the above-mentioned uniform color mixing mechanism for multi-color injection molding of high-transparency automobile headlights, the present invention also proposes a mixing method for the uniform color mixing mechanism for multi-color injection molding of high-transparency automobile headlights, comprising the following steps:

[0054] S1: Feeding: according to the color matching needs, multiple groups of quantitative valves 4 above the feed hopper 6 are set to set the appropriate feed amount of different colorants. The connecting port 5 is connected to the external raw material tank for feeding. The second sieve plate 501 inside the connecting port 5 performs preliminary screening on the colorants to screen out larger colorant particles.

[0055] S2: Conveying, using multiple lower hoppers 6 and second rotating shafts 1201 and spiral push plates 1202 set in the connecting barrel 7 to convey different colorants into the mixing barrel 1. At the same time, the cutter 601 on the inner wall of the lower hopper 6 preliminarily breaks up the colorants. The cartridge heaters 1206 in different second rotating shafts 1201 set different heating temperatures according to the colorants of different materials inside, so as to achieve better heating and melting effects.

[0056] S3: Color mixing. Different colorants are transported to the mixing drum 1 through multiple connecting drums 7, and are mixed by stirring with the first stirring rod 101 on the first rotating shaft 9. After being screened by the second sieve plate 501, they are transported to the injection molding structure through the discharge pipe 105 for injection molding.

[0057] The remaining parts of the present invention that are not described may be the same as the prior art, or are well-known technologies, or may be implemented by using the prior art, and will not be described in detail here.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A uniform color mixing mechanism for multi-color injection molding of high-transparency automobile headlights, characterized in that: include: A mixing drum (1), wherein a color mixing component is arranged inside the mixing drum (1), a connecting drum (7) is fixedly connected to the top of the mixing drum (1), a first support plate (2) is fixedly connected to the top of the connecting drum (7), the connecting drum (7) passes through the first support plate (2) and is fixedly connected to a lower hopper (6), a second support plate (3) is fixedly connected to the top of the lower hopper (6), the lower hopper (6) passes through the second support plate (3) and is fixedly connected to a metering valve (4), the top of the metering valve (4) is fixedly connected to a connecting port (5), and a second sieve plate (501) is arranged in the connecting port (5); A conveying assembly is arranged in the connecting cylinder (7) and is used for conveying different colorants into the mixing cylinder (1).

2. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 1, characterized in that: The conveying assembly comprises a driving motor (8), wherein the driving motor (8) is fixedly connected to the bottom of the first supporting plate (2), and the output end of the driving motor (8) is rotatably connected to a first rotating shaft (9), wherein the first rotating shaft (9) passes through the mixing drum (1) and reaches the bottom of the mixing drum (1).

3. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 2 is characterized by: The first rotating shaft (9) is located above the mixing drum (1) and is fixedly connected to a first gear (10); the first gear (10) and the second gear (11) are meshed with each other; and a rotating ring (12) is fixedly connected to the inner side of the second gear (11).

4. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 3 is characterized by: An extension ring (1203) is fixedly connected to the top of the rotating ring (12), a ball bearing (1204) is arranged on the top of the extension ring (1203), and the extension ring (1203) and the ball bearing (1204) are mutually engaged with an annular rotating groove (701) provided at the bottom of the connecting tube (7).

5. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 4, characterized in that: A connecting plate (1205) is fixedly connected to the bottom of the rotating ring (12), a second rotating shaft (1201) is fixedly connected to the upper end surface of the connecting plate (1205), a spiral push plate (1202) is fixedly connected to the outer side of the second rotating shaft (1201), a cartridge heater (1206) is installed inside the second rotating shaft (1201), and a heat conduction cavity (1207) is arranged between the cartridge heater (1206) and the outer wall of the second rotating shaft (1201).

6. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 5, characterized in that: The spiral push plate (1202) and the second rotating shaft (1201) extend into the lower hopper (6), and a cutter (601) is arranged on the inner wall of the lower hopper (6), and the cutter (601) and the blades of the spiral push plate (1202) are arranged in an alternating manner.

7. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 2, characterized in that: The color mixing component comprises a first rotating shaft (9), the first rotating shaft (9) being located in a mixing drum (1) and being provided with a first stirring rod (101), a discharge port (104) being provided at the bottom of the mixing drum (1), a discharge pipe (105) being fixedly connected to the lower end of the discharge port (104), and the discharge pipe (105) being connected to the injection molding structure.

8. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 7, characterized in that: The first rotating shaft (9) is located in the middle of the mixing drum (1) and is provided with a first sieve plate (103), and a plurality of sieve holes of the same size are provided on the first sieve plate (103).

9. The uniform color mixing mechanism for multi-color injection molding of high-transparency automobile lamps according to claim 8, characterized in that: The first rotating shaft (9) is located above the first sieve plate (103) and is provided with a second stirring rod (102). A brush plate is provided on the lower end surface of the second stirring rod (102), and the brush plate is tightly fitted to the upper end surface of the first sieve plate (103).

10. A mixing method of a uniform color mixing mechanism for multi-color injection molding of a high-transparency automobile lamp according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: feeding, according to the color matching requirements, the amount of different colorants entering the lower hopper (6) is controlled by the quantitative valve (4); S2: conveying, using a plurality of lower hoppers (6) and a second rotating shaft (1201) and a spiral push plate (1202) provided in the connecting barrel (7) to convey different colorants into the mixing barrel (1), while the cutter (601) on the inner wall of the lower hopper (6) preliminarily breaks up the colorants, and the cartridge heater (1206) in the second rotating shaft (1201) preliminarily heats the colorants; S3: Color mixing: different colorants are transported to the mixing drum (1) through a plurality of connecting drums (7), stirred by a first stirring rod (101) on a first rotating shaft (9) for color mixing, sieved by a second sieve plate (501), and then transported to the injection molding structure through a discharge pipe (105) for injection molding.

Images